China has become a major player in the global automotive industry. With the rise of domestic automakers and the increasing demand for cars, China has also become a leading manufacturer of auto parts, including molds. In this post, we will provide an overview of China's auto mold industry and its current state.
China's auto mold industry has been growing rapidly in recent years. According to a report by Research and Markets, the market for auto molds in China is expected to reach $4.5 billion by 2022, with a CAGR of 6.2% from 2017 to 2022. The growth of the industry is driven by several factors, including the increasing demand for cars, the rise of domestic automakers, and the government's support for the industry.
China Auto Mould
China auto mold industry is highly competitive, with many local and international players. The industry is dominated by a few large companies, such as FAW Group, Dongfeng Motor Corporation, and Shanghai Automotive Industry Corporation. These companies have a significant presence in the global market and have established partnerships with major automakers.
The quality of China's auto molds has also improved significantly in recent years. Many Chinese companies have invested in technology and equipment to improve their production processes and ensure high-quality products. Additionally, the government has implemented strict quality standards and regulations to ensure that products meet international standards.
Despite the growth and improvements in China's auto mold industry, there are still some challenges that need to be addressed. One of the major challenges is intellectual property rights (IPR) protection. Many Chinese companies have been accused of stealing designs and technology from foreign companies, which has led to legal disputes and trade tensions.
Another challenge is the environmental impact of the industry. The production of molds requires a significant amount of energy and resources, which can have a negative impact on the environment. The Chinese government has implemented regulations to address this issue, but more needs to be done to ensure sustainable production practices.
In conclusion, China's auto mold industry is a rapidly growing and highly competitive market. The industry has made significant improvements in quality and technology, but there are still challenges that need to be addressed. As demand for cars continues to rise, China's auto mold industry will play an increasingly important role in the global automotive industry.
CNMOULDING is a professional plastic mold manufacturer in China
As a full-service contract plastic mold manufacturer in China, we can provide turnkey solutions for your plastic product manufacturing needs. From product design support through order fulfillment and distribution, PMP offers our clientele a multitude of services. including:
Product Design Support
High Quality Made Tooling in china
Insert & Over-Molding in china
In-Mold Decorating, Pad Printing & Plating
Product Design
A plastic mold manufacturer in China will assist your engineering team in optimizing your product design to aid in its manufacturability, strength, and quality. High Quality Made Tooling in China. From Single cavity and double Inserts to Multi-cavity Hot Runner Molds, Precision Molded Plastics contributes to the GDP of China.
We do not outsource from another supplier. Molded-in mechanical fasteners or highly conductive electronic connectors, Plastic mold manufacturer china will be molded Plastics provides technical service solutions to exceed your every need.
Value-Added Services of plastic mold manufacturer china
In-mold decorating, labeling, pad printing, or chrome plating; Plastic mold manufacturer china possesses the skills and resources to handle any of your product's secondary needs. Secondary Operations Machining Operations and/or hardware installation; We'll build your sub-assemblies and ship them ready for integration into the final product.Complete Assemblies Injection molding, product assembly, retail packaging& distribution, Plastic mold manufacturer in china provides turn-key contract manufacturing fulfillment services.
We work closely with our customers assessing both short and long term requirements. If you require china overmolding, china insert molding, or china two-shot molding, Plastic mold manufacturer china has the experience to create the tooling and molding processes to get your job done right. Material properties and plastic technology are very important when developing precision injection molded parts. When your part has to meet the specific regulations of your industry, having the right material is essential. The correct storage, handling, drying, and processing of today’s highly engineered resins is critical to the production of precision molded parts. Plastic injection molders in china. we pay attention to all aspects of the molding process, from tooling and material to machine and processing
How to choose a plastic injection mold manufacturer
mold making company is very popular with everyone's attention at the moment, it is not particularly suitable for direct production of some products that can be made of plastic models, produced under a single customer after making the decision, both for the convenience and efficiency is high, so are as many customers, so if you choose plastic mold manufacturers to cooperate, in the end how to choose?
Select plastic mold manufacturers to cooperate, then there are a few caveats if you can pay attention to the good, then you can find the best manufacturers of cooperation, the first thing to note is that the manufacturers of credibility, if appeared before manufacturers specified when not completed within the time, then we better take account of, or the customer may not see the model when they took it out.
Choose plastic mold manufacturers also need to pay attention is sure to look at how manufacturers of equipment, is now the model-making equipment is also in constant update them, 3D printers can also be said to be very common, if the manufacturer of the device relatively aging words may be made out of many models have some defects
First important, we own 8 CNC machines, 6 wire cutters, 8 milling machines, 6 EDM machines, and outside good supply chain allows our experienced mold makers to meet compressed lead times while maintaining our reputation for quality injection molding making.From single cavity & prototype injection molding making to multi-cavity and family injection molding making.
Mold maker in china is fully equipped to meet your unique tooling challenges
Our mold making shop is geared to work with injection molds from the small to medium to big size range, i.e. injection mold makers that are designed to run in presses of 800 tons and smaller. China mold makers work with a variety of plastic injection molding making configurations and a summary of available options can be found here Mold Types:
Injection mold designing, injection molding making, and specialty tooling have been the backbone of our business since our inception in 2002. We apply our decade of expertise in producing precision injection mold. We are particularly adept at tooling for Automotive, Printer, Electronic precision, and. Medical Connector Parts.
mold making company
china mould maker, china mold making, china mold makers, mold makers in china above 4 hot tag usually for customer search/find good mold manufacturer in china.
Cn-moulding means Plastic Injection Molding manufacturers in China
Description of Injection Molds
Product Name: Plastic injection mold Mold core&cavity steel: NAK 80, 718, P20,H13,2344, etc. Mold base: LKM, HASCO, DME, etc. Mold life: 200k-1 million shots Packaging: Wooden case Delivery time: 25-60 days.
Our factory has five sets of CNC machining centers. Up to 30,000 rpm spindle machining centers. P. M. speed CNC machining centers. 9 to CNC EDM machines and 5 WEDM. CMM has the function of reverse scan data to ensure mold production in a timely, effective, and accurate completion of the process design. It can produce pulled stamping dies, automotive testing tools, and thermoplastic molding tools. The core of the injection molding shop's annual production capacity of 400 sets of precision injection molds or 800 sets of ordinary medium-sized injection molds our service is a one-stop injection molding manufacturer solutions company for polymer-based products.
We focus on plastics design, plastic injection molding manufacturing, tight tolerance molding, part joining and assembly, and painting, and serve a number of markets including Medical-Diagnostic, Industrial, Electronics, Communication, Consumer, and Automotive. we are always manufacturing highly- demanding and tight-tolerance precision parts for industries such as the automotive, banking, and healthcare industries. And we are able to offer our customers a quick turnaround and high-quality injection molds, prototyping, and plastic injection molding manufacturing services.
Our mold making company's Competitive Advantages:
Electronic Online Experienced Engineer Guarantee within 7 days. International Approvals Military Specifications Quotation 1-day Product Features Product Performance Prompt Delivery Quality. Approvals Reputation Service 24 hours of project Control.
Globe Markets:
Eastern EuropeNorth AmericaMid EastCentral/South AmericaSouth AfricaWestern Europe-Australia Welcome to provide samples or 2D / 3D drawing in step, XMT or IGES 3D drawing type, or AutoCAD and PDF type. We can design and produce the molds need. If you want to compare prices, find a very professional injection mold company's products in China. Please send the information to us you are interested, we will give you a good price report. This will be our big pleasure if we have a chance for your services.
Due to the rapid development of plastic materials and the extensive demand for plastic products, more requirements are put forward for the properties of plastic injection mould steel. Therefore, many developed countries in Europe and America have created a wide range of plastic mold steel series, including carbon steel, Carburizing plastic mold steel, aging hardening plastic mold steel, corrosion-resistant plastic mold steel, free processing plastic mold steel, and permeable plastic mold steel. Maraging plastic mold steel and mirror polishing plastic mold steel, etc.
NAK80 is a 40 HRC pre-Hardened, high-performance, high-precision, mold steel.
Applications include plastic molds, rubber molds, jigs & fixtures, and press dies.
Features:
Machines up to 20 percent faster than HRC 30 P20
Pre-hardened to 38-42 HRC
Uniform microstructure & hardness (40 HRC between surface & interior)
Never needs stress relieving, even after heavy machining
Highly weldable, HAZ gets softer not harder (re-age harden to bring back to 40 HRC)
EDM layer is easy to remove
DAIDO DHA1 – High performance hot-work tool steel JIS SKD61
“SKD-61” is special tool steel, also known as “die steel”! The brand corresponding to our country (GB/T 1299-2000) is 4Cr5MoSi V1, which is the most widely used hot die steel. It can replace the SKD61.SKD61 corresponding to the US standard is H13, Korea is STD61. The chemical composition of SKD61, Japan grade hot work die steel (JIS4404-1983) is as follows:%): C: 0.32n0.42 Si: 0.81.2 Mn: < 0.50 Cr: 4.505.50 Mo: 1.001.50V: 0.80.3P: < 0.03P: < 0.03 heat treatment: air quenching, quenching temperature 10201050 degrees, hardness 5658HRC, heat treatment deformation small, surface nitriding.
5 Classes of mould
According to the length of mould life, molds can be divided into five categories. The number of shots in the first type mould is 1 million or more, the second mold is 500000-1 million times, the third mold is 300000-500000 times, the fourth mold is 100000 times, the fifth level is less than 100000 times, The steel materials required for the first and second grade dies are: they can be hardened and the hardness is about HRC 50, otherwise the mould is easy to wear, which leads to the tolerance of the injection molding products exceeding the standard. Therefore, the selected steel material should have good heat treatment properties and machinability despite its high hardness.
There are, of course, other considerations. Typically, steel options include Sweden 8407 and S 136; USA 420 and H13; Europe 2316, 2344 and 2083; and Japan, SKD 61. For strongly corrosive plastics, steel S 136C 2316 and 420 are usually used. In addition to steel S136H2316 and steel 420, SKD 61Nak 80 / PAK90 and 718M steels can also be used for low corrosion plastics. The appearance of the products also has a great influence on the die materials. The steel materials S136H 2316718 SNAK80 PAK90 and 420 steel are suitable for transparent polishing and mirror polishing products, while the high transparent products should mainly use S136, followed by 420 steel class .3 dies mainly using pre-hardened steel such as S136H, S136H 2316HN718H, and 083H, etc. The hardness is between HB 270 and 340. Type 4 and Class 5 dies are usually made of steel P20718, 738, 6182311, and 2711. For extremely low demand dies, S 50 C and 4 steel can be used, that is, a cavity can be made directly on the mould frame.
Product description: Rich experience producing transparent plastics part mold and part in china. It needs high-quality requests for the injection molding control process.
Clear transparent plastics characteristics: transparent insulation thermoplastic environmental protection plastic products, plastic transparent. After burning the odorless tasteless. It does not produce poisonous gas. Transparent, surface water ripple, crystal point, ones like white, grease, and toughness. And strong resistance, chemical resistance, good resistance to impact strength. Low-temperature resistance to impact strength is also good. Is about 20% higher than the PVC standard). Used for blister, folding boxes, packaging, printing, CARDS, etc.
Transparent insulation use of transparent insulation is used in electronics, printing, packaging, insulation, soft lines. A display screen saver PET, membrane switch, membrane Windows, printing film, puzzle film base, stickers bottom paper, glue. Silicon coating, belt, instrument panel, cable capacitance motor gasket. Insulation stripping, furniture, window film, protective film inkjet printing. And decoration, etc. PC transparent insulation slices are double-sided polishing film, have good pervious to light quality, and high dimensional stability. It can make the required electroplating process and screen printing various textures, decorations, and optical effects for aesthetics.
PC material
PC is a kind of amorphous, odorless, non-toxic. Highly transparent colorless or yellowish thermoplastic engineering plastics. Has excellent physical and mechanical properties.
Especially the excellent impact resistance. High tensile strength, bending strength, compression strength. Creep is small, size stable. Has good heat resistance. And low-temperature resistance. A relatively wide temperature range has stable mechanical properties.
Dimensional stability, electrical properties, and flame retardancy can use for a long time under 60 ~ 120 ℃. No obvious melting point, in 220-230 ℃ in the molten state.
Due to the molecular chain rigidity, resin melt viscosity. Bibulous rate is small, small shrinkage rate, high dimensional accuracy.
Good dimensional stability, membrane permeability is small. Self-extinguishing material. Light is stable. But not resistant to ultraviolet light, good weather ability.
They can withstand oil, acid, alkali resistant, oxidizing acid, and amine, ketone, soluble in chlorinated hydrocarbons. And aromatic solvents, Easy cause hydrolysis and crack in the water for a long time.
The disadvantage is that because of the fatigue strength is poor, prone to stress cracking. The solvent resistance is poor, with poor wear resistance. The product features environmental protection. Flame retardant, impact resistance, high and low-temperature resistance. Good dimensional stability, and good insulation.
Specifications china transparent injection molds making
1. Our clear transparent parts are widely recognized and trusted by users. And can meet continuously developing economic and social needs.
2. A quality hot runner already widely used to reduce cycle times and maintaining the shinning. And clear surfaces during long-time production.
3. We guarantee the mold life and injection mold spare part use /changeable.
4.S7/H13/2344 after heat-treat. The hardness will be up to 52-54 HRC to get longer mold life.NAK80. 718 is also a good choice for transparent clear injection mold making in China.
5. High-quality steel has to be tested and certificated from steel suppliers in accordance with the transparent parts.
Injection Mold Slider Design: Key Principles & Best Practices
Sliders (also called side-action cores or cam mechanisms) are essential mold components used to form undercuts or complex geometries that cannot be released by standard ejection systems. Here’s a comprehensive guide to slider design for injection molds:
1. When to Use Sliders?
Sliders are needed when:
The part has external undercuts (e.g., side holes, hooks, threads).
The part has internal undercuts (e.g., snap fits, internal grooves).
Straight ejection would damage the part.
2. Slider Types & Mechanisms
Type
Description
Application
Angled Pin Slider
Driven by a tapered pin during mold opening.
Simple side undercuts, low-cost.
Hydraulic Slider
Uses a hydraulic cylinder for controlled movement.
Larger angle = Faster movement but higher friction.
Smaller angle = Smoother but slower action.
(2) Guiding & Locking
Wear Plates (hardened steel) reduce friction.
Locking Blocks prevent slider deflection during injection.
(3) Cooling Considerations
Avoid cooling lines near sliding surfaces to prevent warping.
Use baffles/bubblers if cooling is necessary.
(4) Draft Angles
Add 1°–3° draft on slider contact surfaces to ease release.
4. Step-by-Step Slider Design Process
Identify Undercut Location
Check part CAD for undercuts requiring side action.
Choose Slider Type
Angled pin for simple designs; hydraulic for complex motions.
Calculate Travel & Angle
Ensure full undercut clearance without interference.
Design Slider & Core
Use split cores if undercut is deep.
Add Locking & Ejection
Locking blocks + return pins for stability.
Simulate Motion
Check for collisions in mold-opening sequence.
5. Common Slider Defects & Solutions
Issue
Cause
Solution
Slider Sticking
Poor lubrication/wear.
Use self-lubricating materials (e.g., bronze guides).
Part Damage
Insufficient travel/draft.
Increase slider stroke or draft angle.
Flash Formation
Worn locking surfaces.
Replace hardened lock blocks.
6. Advanced Tips
Micro-Sliders: For tiny undercuts (<2mm), use spring-loaded mini-sliders.
Collapsible Cores: For threaded parts, use retractable cores.
3D-Printed Sliders: For prototypes, use metal 3D printing for complex geometries.
Conclusion
A well-designed slider ensures smooth demolding of complex parts while maintaining mold longevity. Prioritize: ✔ Precise travel calculation ✔ Robust locking/guiding ✔ Proper cooling & lubrication
For high-volume production, hydraulic sliders offer better control, while angled pin sliders are cost-effective for simpler molds.
Would you like a specific case study (e.g., automotive part slider design)?
injection mold sliderinjection mold slider design
In conclusion, the design of an injection mold slider is a critical factor in the success of any injection molding process. By carefully considering factors such as material choice, shape, mechanism, placement, and maintenance, it is possible to design a slider that functions correctly and produces high-quality parts. With careful planning and attention to detail, it is possible to create injection molds that deliver excellent results time and time again.
As a professional china injection mold company, we focus on precision mold making manufacturing in china for the complicated slider.
In China, a long-standing tradition of export mold manufacturers, we share here the basic injection mold making overview:
1. Parts Design (client may provide completed 3D files) The tooling process begins with a completed and checked part design. CNMOULDING can optionally optimize your design before tooling to lower your costs and ensure that your design will work well.
If you would like to validate your parts design with a machined piece that you can see and feel, CNmoulding can use Computer Numerical Control (CNC) techniques to prototype your parts.
3. Tool / Mold Design
At this stage the tool is designed, using the information from your completed tools and molds design
4. Tool / Mold Check and Mold Flow Analysis The tool design is validated for correctness.
5.Tool / Mold Fabrication
(including use of Computerized Numerical Control (CNC) and Electrical Discharge Machining (EDM) technologies) The tool is precisely fabricated according to the validated design.
6. New Injection Molds First Shots To Client Once the injection molds are made, the first test shot samples will be sent out soon after via an international courier. Once sent, these usually take around 2-5 days to arrive.
7. Tool / Mold Modifications and Texturing At this stage, the Mold shop completes the tool and makes any required changes to bring the tool into the approved spec. Changes made to bring the tool to spec (specifically excluding design changes, which are always charged) are made free of charge. At this stage, texturing also takes place, which is normally the last stage before mass production.
8. Mass Production Run or Export At this stage, parts are produced and delivered to the customer, or the tool is released for export use.
Technical Topics:
Molding begins with tooling. No matter how good the design, if the tooling is not up to the task. The quality of the parts will suffer.
Achieving consistent dimensions and quality requires up-to-date molding machines, operating to specifications, with precise position and pressure control capabilities. The basic construction of a molding machine is fairly straightforward.
Material is fed in through a hopper into a screw and barrel where it is heated to a molten condition. The melt is then injected under high pressure into the mold while the mold is held closed with the high force of a toggle or hydraulic ram. The goal is to melt resin in a very uniform and repeatable fashion. Inject it into the mold under very precise and repeatable pressure conditions. And hold the steel temperatures in the entire flow system very stable. After the molten plastic is solidified, the mold is opened and the gear is ejected. It then continues to cool in the open air.
There are many handling and pre-processing requirements for injection molding materials. Engineering polymers quite often must be dried to a specific dew point before use. When parts are made, runners are formed that some shops regrind and put back in the melt. This quite often raises more quality concerns than the slight savings in material expense may justify, and CPIM uses only virgin material.
The method of injecting the plastic into the mold is very important. In most cases, the plastic should be injected under high pressure very quickly to maintain the good characteristics of the melt completely during the injection. As the mold cavity fills, the injection pressure should be held at the same high value and the speed of injection slowed to maintain that pressure. At the moment when the part is filled, and the molding machine switches over from injection to a pack & hold condition, the plastic melt is held at the same high pressure. This pressure is held for as long as it takes to freeze the gates and achieve the highest weight possible for the molded part.
Custom mold making service
Custom mold-making service for export to the U.S. and other countries is becoming more popular. Cnmoulding builds a large portion of its custom design tools for export. Our clients have found that they can save 50-70% on tooling by having us manufacture the tools for them in China. And export them to their facility, a local plastic shop, or our plastic injection molding facility. By making the molds in China customers can reduce their initial investment substantially, and allocate that revenue towards extra inventory if they choose.
Cnmoulding ensures 100% satisfaction with our tools. Detailed drawings are provided for customer approvals, and we always provide prototypes for first article approval before packaging and shipping the tools. Custom mold making services are also designed to fit in whatever injection molding equipment our customers or their suppliers might have. Those dimensions are obtained from our customers before finalizing pricing and drawings.
Mold making is a thermoplastic, thermosetting plastics, and relatively low melting point metal molding mold. This article is particularly concerned with the processing of thermoplastic mold making. Through the injection molding company owned steel, metal cutting, using a variety of processing machines. The finished inserts are assembled by experienced technicians into a custom-made mold base and the desired design molds are obtained. Injection mold making processing in China is currently the most widely used export. The most mature technology of the strong foreign trade industry.
Send us your next custom mold making project for a free reference quote from our factory. We guarantee you will be impressed with the quality and savings!
PPSU Part Mold Making Company： As we know, PPSU is a high-performance plastic material. They are used more and more in the medical and food field. First of all, let us learn the character of the PPSU:
High Heat, High Impact Performance
The high heat resistance and excellent hydrolytic stability of PPSU make it an excellent choice for hot water fittings, and medical devices requiring repeated steam sterilization. PPSU products are specially formulated for use in aircraft interiors. And are in compliance with stringent FAA regulations requiring low heat release. China injection mold has low smoke generation and low toxic gas emissions.PPSU offers cost advantages for applications with less demanding requirements.
PPSU Parts Mold Makin Key Features
High HDT of 207°C (405°F)
Superior toughness and impact strength
Exceptional long-term hydrolytic stability
Better chemical resistance than PPSU and PEI
Withstands over 1,000 cycles of steam sterilization without any significant loss of properties
Inherently flame retardant
Transparent
Colorable
Now they are used in the fields as follows:
PPSU (Polyphenylsulfone) is a high-performance engineering thermoplastic material that is known for its excellent mechanical properties, heat resistance, and chemical resistance. PPSU parts can be used in a wide range of applications in the medical, aerospace, automotive, and electrical industries. Some common PPSU parts include:
Medical instruments – PPSU is often used to manufacture medical instruments such as dental tools, surgical instruments, and blood filtration devices due to its biocompatibility and sterilization capabilities.
Aerospace components – PPSU is lightweight, strong, and resistant to high temperatures and chemicals, making it an ideal material for aerospace components such as aircraft interiors, electrical connectors, and engine parts.
Automotive components – PPSU is used in automotive applications such as fuel system components, electrical connectors, and engine parts due to its resistance to heat, chemicals, and high-pressure fluids.
Electrical components – PPSU is an excellent electrical insulator, making it an ideal material for electrical components such as circuit breakers, switches, and electrical housings.
Food and beverage industry components – PPSU is FDA-compliant and can be used in food and beverage industry applications such as water filtration systems, food processing equipment, and beverage dispensers.
After we study the PPSU character, we should know how to choose the steel for the mold. Since the mold temperature is about 300 °C-400°C during production. The first is important to make good cooling systems for mold making. If the mold temperature is always high because of the poor cooling system. The mold life will be affected, injection mold companies the second the flowability of PPSU is not good as ABS, PA. We always avoid point gates and make the game as big as possible. Third, produce this kind of mold. We should equip a special screw and nozzle in the injection machine, the high temperature will hurt the normal machine.
Polyethylene Terephthalate (PET) has gained widespread popularity across various industries due to its exceptional properties and versatility. PET is extensively used in the production of packaging materials, automotive components, electronic devices, and numerous other applications, making it a cornerstone of modern manufacturing.
Key Advantages of PET Material
1. Exceptional Mechanical Strength PET is renowned for its high tensile and impact strength, making it ideal for applications that demand durability and resistance to external forces. This ensures that PET parts can endure harsh environments while maintaining their structural integrity over time.
2. Superior Chemical Resistance PET exhibits excellent resistance to a wide range of chemicals, including acids, alkalis, and solvents. This property makes it a preferred material for industries such as automotive manufacturing and chemical processing, where exposure to aggressive substances is common.
3. Outstanding Dimensional Stability PET parts have low moisture absorption, ensuring their dimensions remain stable even under fluctuating humidity levels. This characteristic is critical for applications requiring precise measurements and tight tolerances.
4. High Transparency PET is highly transparent, offering excellent light transmission. This makes it a popular choice for food and beverage packaging, where product visibility is essential. Additionally, its transparency facilitates easy inspection and quality control during manufacturing.
5. Recyclability and Sustainability PET is fully recyclable, contributing to a more sustainable and eco-friendly manufacturing process. Its ability to be reused has made it a favored material in industries prioritizing environmental responsibility and waste reduction.
6. Versatile Processing Methods PET can be processed using various techniques, including injection molding, blow molding, and thermoforming. This versatility allows manufacturers to produce PET parts in a wide range of shapes and sizes, catering to diverse application needs.
Applications of PET Material
- Packaging: PET is widely used for bottles, containers, and films due to its transparency, strength, and recyclability. - Automotive: ET components are used in interior and exterior parts, benefiting from their durability and chemical resistance. - Electronics: PET is employed in insulating films, connectors, and other components requiring dimensional stability and electrical properties. - Consumer Goods: PET’s versatility makes it suitable for products like household items, textiles, and more.
Conclusion
PET material stands out as a superior choice for manufacturing high-quality parts across industries. Its combination of mechanical strength, chemical resistance, dimensional stability, transparency, recyclability, and processability makes it an indispensable material. As industries continue to evolve and seek innovative solutions, PET is poised to remain a key player in meeting these demands, driving both performance and sustainability.
At present, the injection mould in the mould industry accounted for about 30% of the import and export proportion up to 50 to 70%. In recent years, China’s rapid development of injection mould. With the growing use of plastic products for plastic moulds to provide a very broad market. So that the overall trend of the mold market steady upward.
It is expected that in the future mould market. The development of plastic moulds will be higher than other kinds molds in the mould industry will gradually increase the proportion.
And which plastic mould processing technology generally presents the following trends:
1, Precision mould making manufacturer is an inevitable trend
The mould precision will be higher and higher. 10 years ago, the precision molds are generally 5 microns, has now reached 2-3 microns, 1 micron precision injection moulds will also be listed. At the same time, so-called precision mould making is the mould development process and manufacturing results in terms of concrete manifestations. Stamping process and mould structure design rationalization, high precision molds, mould products, high reliability. And technical management Tightness. Precision mould manufacturing is not a single technology. But also the designing, processing, and management of a comprehensive reflection of technology. To realize precision mould manufacturing, in addition, to rely on technical excellence, it will also be strict management to ensure.
2, Scientific management and information technology is the injection mould enterprise development direction
Another important aspect of injection mould technology development is scientific management and information technology. China injection mould making companies use scientific management continue to just-in-time manufacturing and lean production direction, enterprise management more accurate. A substantial increase in productivity, ineffective institutions, links, and personnel streamlined.
3, Mould (Mold) is becoming larger and larger
Injection mould forming parts size and high productivity parts are increasing, requiring a multi-cavity, resulting in increasing the mold size, large mould tonnage up to 100 tons. A few hundreds of cavities, several thousand cavities, require mold processing equipment Table. Increase the y-axis z-axis travel, large load-bearing, high strength, high consistency. The fine processing of the mold makes the processing equipment more complex and more interesting. High-speed milling with the processing of high hardness materials, processing a smooth, cutting force is small. The workpiece temperature, deformation, and many other mold enterprise’s advantages to paying more attention to high-speed processing.
4, Multi-functional composite mold will be further developed.
Mould processing die steel material hardness is high, requires mould processing equipment with thermal stability, high reliability. For the complex cavity and multi-functional composite mould, with the workpiece complexity shape, we must improve the mold design and manufacturing level, a variety of trenches, a variety of materials in a set of moulds or assembled into multi-functional composite components Mould, requires a large number of processing program, with a high hole integrated cutting capacity and high stability, improve the processing difficulty.
5. High dynamic accuracy.
Mould machine has a static performance in the mould three-dimensional surface processing, can not reflect the actual processing situation. The high precision machining of the three-dimensional surface of the mould is proposed. The high precision is also realized in the high rigidity, thermal stability, high reliability, and high quality machine control system
Injection molding is a complex manufacturing process that can produce high-quality plastic parts. However, there are several defects that can occur during the injection molding process. Here are some common injection molding process defects:
Warping:
This occurs when the plastic part cools and contracts unevenly, causing it to warp or twist. Warping can be caused by uneven cooling, improper mold design, or incorrect material selection.
Sink marks:
These are depressions or indentations that appear on the surface of a plastic part. Sink marks are caused by uneven cooling, thick areas of the part, or insufficient packing pressure.
Flash:
Flash is excess plastic material that protrudes from the parting line of the mold. It is caused by excessive injection pressure, poor mold alignment, or worn or damaged molds.
Short shots:
Short shots occur when the plastic material does not completely fill the mold cavity, leaving the part incomplete or with missing sections. Short shots can be caused by insufficient injection pressure, improper material selection, or inadequate venting.
Burn marks:
The burn marks are dark or discolored areas on the surface of the part caused by overheating of the plastic material. Burn marks can be caused by excessive injection speed or pressure, inadequate cooling, or poor venting.
Voids:
Voids are empty spaces or air pockets within the plastic part. Voids can be caused by inadequate injection pressure, poor mold design, or insufficient cooling.
Overall, injection molding process defects can be caused by a variety of factors and can be challenging to prevent. Careful attention to mold design, material selection, and process parameters can help to minimize these defects and produce high-quality plastic parts.
Injection Mold Slider Design: Key Principles & Best Practices
Sliders (also called side-action cores or cam mechanisms) are essential mold components used to form undercuts or complex geometries that cannot be released by standard ejection systems. Here’s a comprehensive guide to slider design for injection molds:
1. When to Use Sliders?
Sliders are needed when:
The part has external undercuts (e.g., side holes, hooks, threads).
The part has internal undercuts (e.g., snap fits, internal grooves).
Straight ejection would damage the part.
2. Slider Types & Mechanisms
Type
Description
Application
Angled Pin Slider
Driven by a tapered pin during mold opening.
Simple side undercuts, low-cost.
Hydraulic Slider
Uses a hydraulic cylinder for controlled movement.
Larger angle = Faster movement but higher friction.
Smaller angle = Smoother but slower action.
(2) Guiding & Locking
Wear Plates (hardened steel) reduce friction.
Locking Blocks prevent slider deflection during injection.
(3) Cooling Considerations
Avoid cooling lines near sliding surfaces to prevent warping.
Use baffles/bubblers if cooling is necessary.
(4) Draft Angles
Add 1°–3° draft on slider contact surfaces to ease release.
4. Step-by-Step Slider Design Process
Identify Undercut Location
Check part CAD for undercuts requiring side action.
Choose Slider Type
Angled pin for simple designs; hydraulic for complex motions.
Calculate Travel & Angle
Ensure full undercut clearance without interference.
Design Slider & Core
Use split cores if undercut is deep.
Add Locking & Ejection
Locking blocks + return pins for stability.
Simulate Motion
Check for collisions in mold-opening sequence.
5. Common Slider Defects & Solutions
Issue
Cause
Solution
Slider Sticking
Poor lubrication/wear.
Use self-lubricating materials (e.g., bronze guides).
Part Damage
Insufficient travel/draft.
Increase slider stroke or draft angle.
Flash Formation
Worn locking surfaces.
Replace hardened lock blocks.
6. Advanced Tips
Micro-Sliders: For tiny undercuts (<2mm), use spring-loaded mini-sliders.
Collapsible Cores: For threaded parts, use retractable cores.
3D-Printed Sliders: For prototypes, use metal 3D printing for complex geometries.
Conclusion
A well-designed slider ensures smooth demolding of complex parts while maintaining mold longevity. Prioritize: ✔ Precise travel calculation ✔ Robust locking/guiding ✔ Proper cooling & lubrication
For high-volume production, hydraulic sliders offer better control, while angled pin sliders are cost-effective for simpler molds.
Would you like a specific case study (e.g., automotive part slider design)?
injection mold sliderinjection mold slider design
In conclusion, the design of an injection mold slider is a critical factor in the success of any injection molding process. By carefully considering factors such as material choice, shape, mechanism, placement, and maintenance, it is possible to design a slider that functions correctly and produces high-quality parts. With careful planning and attention to detail, it is possible to create injection molds that deliver excellent results time and time again.
As a professional china injection mold company, we focus on precision mold making manufacturing in china for the complicated slider.
