China auto industry of Die-casting

 

China auto industry of Die-casting Overview

Auto mold includes stamping Dies, plastic molds, Die casting molds. Wherein the stamping and Die-casting molds proportion of 50%, automobile mold having a size with a complex process, and high technical standards, technology-intensive products. Automotive panel Die is an important automotive body production technology. And equipment, the design, and manufacture of the automotive development cycle time of approximately two-thirds. It is a major constraint to change car type. Automobile production in more than 90% of the parts you want to rely on the molding. In the United States, Japan and other developed countries, automobile manufacturing, mold industry for more than 40% of the products are automobile mold. While China is only about 1/3 of the mold for the automotive industry and services. Therefore, auto mold is known as the “automobile of industry mother “

China auto industry of Die-casting demand trends

Die casting mold in a category. With the rapid development of China’s automobile and motorcycle industry. The casting industry ushered in a new period of development. But also on the mechanical properties of the casting mold, life, and put forward higher requirements. To meet the increasing demand for use of performance relying solely on new mold material applications is still difficult to meet. Various surface treatment techniques must be applied to the surface treatment of Die-casting mold for casting molds. Which can achieve high efficiency, high precision, and high-life requirements? In various molds, die-casting mold working conditions are more demanding. Pressure casting mold is filled with a molten metal cavity under high pressure, high speed and Die casting. Repeated contact with the hot metal in the course of their work. Thus requiring casting molds have a higher resistance to thermal fatigue. Thermal conductivity, wear resistance, corrosion resistance impact toughness, red hardness, good release and so on. Therefore, surface treatment technology of Die-casting mold high demand.


It is understood that, at present, China’s market is a very active Die-casting mold. Die-casting mold products will become a new consumption hot spots and new points of economic growth. Although China’s mold industry started earlier, the development of increasingly mature. But technically still need to work, my overall level of mold industry is still lagging behind the international advanced level. Mold products still can not meet the market demand for mold, mold on the domestic market to meet the rate of less than 80%.

 Die-casting localization speed, high-opportunity emerging markets

 

This year, China’s mold the backbone enterprises in the overall strength of continuous improvement, car manufacturers cost pressures and the joint role of the state vigorously support. Our many own-brand car companies have required the development of the mold from the mold vehicle imports to domestic procurement, Volkswagen, GM. And other auto companies have begun joint-known high-end mold coverage to domestic procurement. Localization of mold to further expand domestic demand, especially high-end auto mold market.

Meanwhile, as China’s auto mold enterprise technology and equipment. The level of design and manufacturing level continues to improve. The gap between the technical level and product quality of the domestic mold. And Western developed countries gradually reduces the domestic auto mold companies already have production of high-grade car cover the ability to mold. While China’s average labor costs are cheap, the mold price advantage is obvious. Therefore, in recent years, foreign car manufacturers have turned to our purchasing. And our country as a new car covering mold manufacturing base can visit on the spur of automobile panel export mold. Which is to expand the production scale of China’s automobile mold manufacturing enterprises to enter the international market provides a rare historical opportunity.

What is the difference between two-color mold and over mold

 

What is the difference between two-color mold and over mold?

A. two-color mold:

A two-color mold is a type of injection mold that can produce a plastic part with two different colors or materials. It has two cavities, each having a different material or color. The mold is designed in such a way that the two materials can be injected into the mold in two separate stages. The first material is injected into the first cavity, and then the second material is injected into the second cavity, which is connected to the first cavity. This creates a part with two colors or materials that are seamlessly blended together. Two-color molds are commonly used in the production of automotive parts, electronic products, and household items.

B. Over mold (overmolding):

What is overmolding?

Overmolding is a process in which a plastic part is created by molding one material over another material. This technique is used to create a part with a soft, rubber-like grip or a more durable surface. The process involves molding a substrate or base material, and then molding a second material, the overmold, onto the first material while it is still in the mold. The second material is usually a thermoplastic elastomer (TPE) or a rubber material that is molded onto the surface of the substrate. Overmolding is commonly used in the production of consumer products, such as toothbrushes, razors, and power tools, to provide a comfortable grip and improve the product's performance. It is also used in the production of medical devices and automotive parts, where it can improve the safety and durability of the product.

Two-color mold and over-mold Overview:

Plastic mold in the design should pay attention to the positioning of the hard plastic pieces, and shrink, to prevent plastic deformation. Two-color mold is increasingly prevalent in the market, in this process can make the appearance of the product more beautiful, easy For color and can not spray, but expensive, high technical requirements.

 

1, Regarding the mold aspect difference

1，Cavity's two shapes are different, respectively, forming a product. The Core's two shapes are exactly the same.

2. Die cavity, core to the center of rotation 180o, must match. The design must do this check action.

3. Note thimble hole location, the minimum distance 210mm. Large mold to be appropriate to increase the number of top hole sticks. And, because the thimble attached to the injection molding machine itself is not long enough, we must design an extension thimble in our mold. The thimble should grow about 150mm around the mold base. Rear mold base plate must be designed 2 locating ring

4.cavity panel plus the total thickness of the A plate can not be less than 170mm. Look carefully at the other reference data for this type of injection molding machine. For example, the maximum Die thickness, the minimum die thickness, the distance to the top stick hole, and more.

5. Three board mold outlet can best be designed to automatically release action. Special attention should be paid to the release of soft glue outlet action is possible.

 

2, Regarding the injection molding aspect difference

1，The depth of the front sprue, not more than 65mm. The distance from the top of the sprue on the upper side (large spout) to the center of the mold embryo is not less than 150mm.

2. In the design of the second injection of the cavity, in order to avoid cavity scratches the first good product glue bits, you can design part of the avoidance. However, we must carefully consider the strength of each sealing plastic position, that is: in the injection molding, whether there will be a large injection pressure, the plastic deformation, resulting in the second injection may have approved the production possible?

3.The first injection molding product size can be slightly larger, so that it can be pressed in the second cavity with another tight, in order to achieve the role of plastic closures.

4. Note that in the second injection, the plastic flow will rush to the first good product that has been formed, the plastic deformation? If this is possible, we must find ways to improve.

Inverse Globalization Industry chain leaves China

 

Reverse the trend of globalization will happen soon

After the new crown epidemic, it will be a trend for countries around the world to set up more independent, complete, and safe industrial chains. Which will reverse the trend of globalization inevitable and will eventually become a foregone conclusion. “But in In the short term, it is difficult for countries to construct independent industrial chains and industrial systems, globally the industry chain. Is also difficult to reverse in the short term. And the global industry chain will not be able to decouple
from China in the short term.

Over the past few decades, countries around the world have benefited from globalization, and each country’s industrial chain has not been able to stand alone must be embedded in the global industrial chain. But mistrust will increase after the outbreak. I’m sure every country will. It will be a trend for countries to set up more independent, complete, and safe industrial chains. In the global industry chain Under the trend of transformation, the shadow of reverse globalization will appear.
Perhaps the trend against globalization is inevitable and will eventually become a foregone conclusion, but against the whole. Spheroidization can cause great harm to countries and is a great disaster for the global economy.

Establish a new Industrial chain include mold and injection molding industry

After the epidemic, all countries want to establish an independent and complete industrial chain and the global industrial chain will be simplified. After the outbreak, the global industrial chain will be reduced Less dependence on China, we must be alert to the global industrial chain to China.

Especially the basic medical and people’s livelihood industries go to China. Will be inevitable. As a matching mold and injection molding industry, because it is done parts processing, so the impact will not be very big.

However, in the short term, it is difficult for countries to construct independent industrial chains and industrial systems, and for global industrial chains to occur in the short term。 A reversal change. Some countries have the ability to construct independent industrial chains, while others do not. Even America, Europe
In the developed countries, it is not easy to form an independent and complete industrial chain after the epidemic. In the past few decades, the United States Many developed countries in Europe have been pursuing the policy of de-industrialization and vigorously developing the virtual economy. Now it seems that these countries have been industrialized. It’s almost gone, and many industries are dead.

 

Restore the manufacturing industry and form an independent industrial chain system is very difficult

First, lack of industrial investment, lack of bosses

Whether Japan, the United States, or Europe, many manufacturing companies second generation.Unwilling to take over factories, make manufacturing, prefer to do the Internet, finance and another virtual economy;

Second, lack of labor, go to industry

Turn causes young people to go to finance, real estate, and other industries, manufacturing lacks young workers. In America, Europe, the cheapest electricity, natural gas, and other energy resources, the most expensive is labor costs, developed countries labor costs are higher than in China.

Third, lack of funding

In addition, the existence of a trade union system, labor tension between the United States and Europe hindered the development of manufacturing, this difficulty. The problem is difficult to deal with. This is because
the bipartisan campaign mechanism and campaign platform are the main sources of labor tension and the problem can not be solved in the short term Settlement.

Now some industrial chains are moving to Southeast Asia. But now Southeast Asia, like China at the beginning of reform and opening-up has poor infrastructure. Poor roads lead to poor traffic flow, often unstable water and electricity supplies. And the re-establishment of a job in another area. The factory will take at least two or three years, these are the costs to be considered by the enterprise. Take the mold as an example, a generation of technicians trained at least need more than 10 years,
so Southeast Asia wants to establish a complete mold manufacturing and processing system, at present, can not challenge China.

China still have time and opportunity

From the perspective of China’s social and economic environment. After more than 40 years of reform and opening-up. China’s economy and the world economy intersect, you have me, I have you. The global supply chain and industrial chain and China decoupling will bring great harm to both sides. And now look all over the world, from Russia, Japan, South Korea to Europe, and the United States, only our hardworking Chinese workers are still working hard. It can also be seen from the epidemic that Chinese technology is not the best in the world. But the executive power can indeed be called the first in the world to say is obedient.

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