chinamoldmaker

2025年7月8日星期二

CNMOULDING -- Professional TPE Injection Molding Solutions Provider

CNMOULDING is a high-tech enterprise specializing in TPE (thermoplastic elastomer) injection molding, committed to offering customers comprehensive one-stop services ranging from material development, mold design, injection molding to finished product assembly. Equipped with advanced production equipment, a stringent quality control system, and extensive industry expertise, we have established long-term partnerships with numerous internationally renowned brands.

Core Advantages

One. Advanced TPE Injection Molding Technology

Utilizing all-electric injection molding machines and high-precision molds to ensure consistent product dimensions and smooth surface finishes.

Supporting Overmolding and 2K Molding processes, achieving robust bonding between TPE and materials such as PP, ABS, and PC.

Customizable TPE materials with varying hardness levels (Shore A 0-100), color options, transparency, and specialized properties (e.g., flame retardancy, UV resistance, oil resistance, etc.).

Two. Rigorous Quality Control

Certified under the ISO 9001 quality management system to ensure standardized production processes.

Conducting comprehensive testing throughout the entire production cycle, including physical property evaluations (tensile strength, tear resistance, rebound resilience, etc.) and environmental compliance assessments (ROHS, REACH, FDA).

Providing PPAP (Production Part Approval Process) and IQC/OQC quality control measures to meet the stringent requirements of industries such as automotive and medical.

Three. Swift Response and Flexible Production

Capable of supporting small-scale trial production to large-scale mass production, adapting flexibly to customer demands.

Featuring an in-house mold workshop that offers mold design, development, and optimization services to expedite delivery timelines.

A fully integrated supply chain ensures a stable supply of raw materials while minimizing production costs.

Application Fields of TPE Injection Molding

Automotive Components: Sealing strips, dust covers, interior components.

Electronics and Appliances: Cable sheaths, headphone housings, keyboard pads.

Daily Consumer Goods: Toothbrush handles, kitchenware grips, toys.

Medical Supplies: Breathing masks, infusion tubes, medical gaskets.

Why Choose CNMOULDING?

Professional Team: With over 10 years of experience in TPE injection molding, our team provides expert advice on material selection and process optimization.

High Cost-Effectiveness: By optimizing production processes and reducing defect rates, we assist customers in effectively controlling costs.

Full-Service Solution: From design support and mold development to mass production delivery and after-sales tracking, we offer a seamless and worry-free experience.

Global Supply Capability: Our products are exported to international markets, including Europe, the United States, Japan, and South Korea, adhering to global environmental protection and safety standards.

The Role and Working Principle of Lifters in Molds

1. Definition of a Lifter

A lifter is a common ejection mechanism in injection molds, primarily used to address demolding challenges caused by undercuts in plastic parts. It operates through an angled movement (typically driven by an angle pin or guide rail) during mold opening, allowing the part to be released smoothly without sticking or damage.

2. Functions of Lifters

(1) Resolving Undercut Demolding Issues

-When a plastic part has internal recesses, side holes, or snap-fit features, standard ejector pins cannot release it directly. Lifters provide lateral movement to clear the undercut, enabling successful ejection.

(2) Simplifying Mold Structure and Reducing Costs

Compared to sliders or hydraulic core pulls, lifters have a simpler design, making them cost-effective for small to moderately complex undercuts.

(3) Improving Production Efficiency

Lifter movement is automatically controlled by mold opening/closing, eliminating the need for external power sources (e.g., hydraulics or pneumatics), making them ideal for high-speed injection molding.

(4) Enhancing Product Aesthetics

Lifters are usually placed on non-cosmetic surfaces (e.g., inner sides or bottoms) to avoid visible parting lines or ejection marks.

3. Working Principle of Lifters

Lifter movement relies on mold opening, following this typical process:

1. Mold Closing

- The lifter remains stationary during injection to ensure proper part formation.

2. Mold Opening

- As the mold opens, the lifter is pushed by the ejector plate while being guided by an angle pin or rail, forcing it to move at an angle.

3. Ejection Completion

- The lifter slides at a predetermined angle (usually 5°–25°) to clear the undercut, followed by full part ejection via ejector pins.

Schematic:

Mold closed → Mold opens → Lifter moves along angle pin → Clears undercut → Part ejected

4. Common Types of Lifters

(1) Standard Lifter

- Driven by an angle pin, suitable for simple undercuts.

(2) Delayed Lifter

- Remains stationary initially, then moves at an angle later, ideal for complex undercuts or multi-stage ejection.

(3) Hydraulic Lifter

- Powered by a hydraulic cylinder, used for long strokes or high-precision applications (less common, often replaced by sliders).

(4) Two-Stage Lifter

- Uses dual motion (lateral shift followed by ejection) for deep cavities or special geometries.

5. Key Design Considerations for Lifters

(1) Angle Selection

- The lifter angle (typically 5°–25°) must balance ease of ejection with wear resistance. Too shallow an angle may cause sticking; too steep may lead to jamming.

(2) Material and Heat Treatment

- Lifters are often made of hardened steel (e.g., SKD61, H13) and heat-treated (HRC 48–52) for durability.

(3) Lubrication and Guidance

- Wear plates or oil grooves reduce friction and extend lifter lifespan.

(4) Stroke Calculation

The ejection stroke must exceed the undercut depth to ensure complete release.

6. Conclusion

Lifters are essential in mold design, particularly for plastic parts with undercuts. Their simplicity, cost efficiency, and reliability make them widely used in electronics, appliances, automotive components, and more. Proper design of angles, materials, and motion ensures longer mold life and higher product quality.

CNMOULDING-Professional Medical Transparent Plastic Injection Molding Solutions

CNMOULDING As a specialized manufacturer of medical-grade transparent plastic injection molding products, we leverage advanced production equipment, stringent quality control systems, and extensive industry expertise to deliver high-quality, safe, and reliable transparent plastic components for medical devices, pharmaceutical packaging, and laboratory consumables. Our products are widely used in syringes, infusion sets, reagent bottles, Petri dishes, transparent protective shields, and other medical applications, complying with international standards such as GMP and ISO 13485.

Core Products & Services

1. Medical-Grade Transparent Plastic Injection Molded Products

We use premium medical-grade PP (polypropylene), PC (polycarbonate), PETG (glycol-modified PET), and PMMA (acrylic) to produce high-clarity, chemically stable, low-leachate plastic components, ensuring safety and biocompatibility when in contact with pharmaceuticals and bodily fluids.

Key Products Include:

Medical Device Components: Syringe barrels, infusion three-way valves, nebulizer housings, etc.

Lab Consumables: Centrifuge tubes, PCR plates, specimen containers, etc.

Protective Equipment: Face shields, goggles, transparent isolation barriers, etc.

Packaging Solutions: Medicine bottles, blister packs, sealing caps, etc.

2. Custom Development Capabilities

Precision Molding: Microgram-level precision parts with tolerances as tight as ±0.01mm.

Cleanroom Production: Sterile manufacturing in Class 10,000 cleanrooms for critical applications.

Surface Treatments: Anti-fog, anti-static, UV-cured coatings, and other specialized finishes.

3. Rigorous Quality Assurance

Traceable raw materials compliant with USP Class VI, FDA 21 CFR, and other certifications.

Full-process testing: Light transmittance, chemical resistance, biocompatibility validation, etc.

Sterilization validation support (EO, gamma irradiation, etc.).

Industry Advantages

Medical Specialization: 30+ years of experience in medical injection molding.

Rapid Response: One-stop service from mold design to mass production.

Regulatory Compliance: Assistance with product registration and documentation.

For OEM/ODM services in medical transparent plastic products, we offer cost-effective, high-reliability solutions.

2025年7月3日星期四

Plastic mold manufacturer

When you develop a new plastic model, you need to find plastic moulding china to make the mold.
Since the company size, location and history are different. They will quote you different prices.at the moment lots of trading companies pretend to be a plastic mold manufacturer to dealing with you. They will take at least a 30% profit from you and do nothing. Just think about it. If your competitor finds a true plastic mold manufacturer but you find the trading company to develop the same project. They will have a 30% price advantage compared to you. Do you think if you have any chance to win the market?

How to find a reliable plastic mold manufacturer?

I think it’s better to spend some time to get to know one or China injection molding several plastic mold manufacturer really well. Visiting them is the best idea once you get a good feeling about it (after discussions about mold engineering or making a small test mold). When you have a good relationship with a plastic mold manufacturer. And you will know how they think about the technologies and use the same language to discuss mold engineering, more effective. You can move on to your project very fast. That’s where the profit is along with the life of the project. Steel is steel and CNC machines are the same for every shop. In the end, it counts on the people who work with you and if someone does a value stream analysis of a project, the mold quality will be different.

Visit the plastic mold plant

Visit the plastic mold plant and check the facility available with them. Injection molding company asks about his existing customers and main marketing. Check the molds which are in construction in the shop, see the project management system. Look at the sample components they made in the past. All this will give you an idea of the capability and the quality levels of plastic mold manufacturer.
Then check which is your most concern like, lead time of mold building, the finish of the samples, dimensional criticality, quality of steel. After-sales service like modification of mold based on the change in design change during the mold life, the durability of the product.

Know injection mold cost

The cost of mould includes： material fee + design fee + processing fee and profit + VAT + trial fee + packaging transportation fee. According to material cost calculation, mold price =(6~10)* material cost.

Visible, the cost of the mold is mainly in the technology and processing costs above, the material ratio is smaller. The more complex the structure of the mold, the greater the difficulty of production, the higher the cost of course. In addition, the higher the precision of the mold requirements, the greater the difficulty of processing, the greater the effort spent. Of course, the cost of mold production will go.

The most important is: find many plastic mold manufacturers for price and quality checks. Choose the best and proper one as your business partner.

Medical supplies

How is CNMOULDING Supporting Medical Device Manufacturing?

CNMOULDING is currently supporting the medical industry through rapid prototyping, mold creation, and engineering design. The medical industry is quickly advancing technology and products that are being developed specifically with plastic injection molding in mind. CNMOULDING has a rigorous quality initiative for day-to-day operations, which was recognized during our ISO 9001: 2015 certification. Our management system keeps our molded products at the highest quality before distribution to a finished device manufacturer or an end consumer.

Why Does CNMOULDING Recommend Plastics for the Medical Industry?

Reduced Manufacturing Side Effects – Plastic injection molding produces few side effects and has very little scrap material after the injection molding process.

Reduced Tooling Investment – Metal casting and stamping dies can take 12-16 weeks to complete after the initial design is complete. Plastic injection molding dies can be ready to make products in as little time as 6 weeks. Plastic injection molds can last up to six times as long as casting and stamping die.

Unlimited Design Options – Complex metal product designs often require a significant amount of development time and cost to ensure casting or stamping molds will survive a long life cycle. Plastic injection molding can fill molds faster with better results, and plastic products have also seen a rise from 3D printing as new equipment, software, and materials are in constant evolution.

Corrosion Resistance – Plastic is naturally corrosion-resistant by nature, whereas most metals need a secondary or tertiary operation to apply a coating to resist corrosion.

Reduced Product Weight – Engineered plastics can reduce the overall weight of most products. Reducing weight can positively reduce shipping costs and make ergonomic improvements within a manufacturing process.

Biocompatibility – Medical grade plastics are biocompatible which makes them easier to incorporate into new ideas and redesigns of older products.

Recyclable – Medical grade plastics can be recycled without concern of extra protective coatings contaminating new materials.

Mold making project for thermoplastic elastomer molded parts

Recently, we produced three molds for Austrian companies, injection molding products are
thermoplastic elastomers. We call TPE. The customer is a medical company, and the product requirements more stringent. We encountered some problems in the production process, but in the end, they are the perfect solution.

1， Products design

2, Mold design

3. Mold making

4, Mold making for medical-mold teat

5， Work with customers to improve the design

6， The product is covered with a layer of rubber

7， Laser and Silk printing

8， The final product

Troubleshooting for PC plastic molded parts

Focus on Polycarbonate Project success

We are very honored, for a Polycarbonate molded parts project between China and US injection mold company. We become the winner.

There is an American medical company needs 1 set of high precision injection molding part, the part we are going to mold is made in PC raw resin, also called Polycarbonate. Although the transparent plastics piece is our strength, in the actual production process, some problems. Our experts cost time and solve it finally, it should be we can learn and share.

Here’s a simple idea about the injection mold for PC medical products.

Deep Injection Molding Manufacturing Expertise

As you can see the transparent body is a hook surface. The product surface needs to be transparent and no rod traces and dirty marks. We need to ensure that the plastic products will not stick in the side of the cavity during the injection molding process. So it is necessary to use a slider block structure. Because the customer needs all the wall thickness must be uniform, then the light reflection is the same. Look at the pictures and videos can know, for an elliptic shape, the problem is difficult to solve.

Another problem is the bubble inside, the product safety reason, customer have to design and make the wall thickness reaches 5 MM, PC accessories will have some bubbles, from the picture you are hard to find, but the actual existence, made a bubble in the PC material parts get cooling and sealing the door quickly, there are some defects on the surface is easy to produce because of big thickness, to do the right thing, there are a few things you might want to check if the resin completely drying, a suitable mold temperature, injection speed, using multi-point hot runner feeding, etc. here is the final approved sample to see the clean off, there is no bubble at all!

“INCREASE YOUR COMPANY PROFIT WITHOUT SACRIFICING QUALITY “

Trusty Tooling & Mold Making, China Supplier– CNMOULDING.COM

Mold making in China is generally much more affordable than in the West .Cnmoulding.com will devise the appropriate tool and mold-making strategy for you.

China plastic injection molding and injection moulds will save your company 50% to 70% of the cost of U.S. Manufactured molds and we will produce them in half the time it takes to produce the same mold in the U.S.

Manufacture your injection molded products and injection molding with us in China. Send us your 3D solid model CAD drawings or sample or even only your idea. And we will provide you with the absolute lowest price for injection molds as well as your injection molded products with quality standards meeting or exceeding your expectations.

2025年7月1日星期二