Injection mold manufacturing and processing is a very complex process. From mold manufacturing is a complex process, from design, processing, assembly, commissioning, and other steps, to the final real use, any point in the whole process may affect the quality of the injection mold, so what are the factors that affect the quality of the injection mold in the end?

1. Mould steel

Steel is the decisive factor in the quality of injection molds, and choosing reasonable steel is the most important thing.

The criteria for steel selection are：

Requirements of injection molding materials Different plastics should use different steel, such as the requirements of high polish, corrosion resistance, etc.

Price The steel is good if it works, not the more expensive the better; taking into account the cost of the mold, the mold steel should be used and the mold life of the corresponding material to avoid unnecessary waste.

General P20 material life in 300,000 or so; 2738 material in 500,000 no problem, H13/2344 usually in 800,000-1,000,000 or more, can be selected according to the situation.

Surface treatment The surface treatment of the mold is also very important. Nitriding can enhance the surface hardness of the steel and effectively extend the life of the mold; electroplating can effectively modify the mold steel, and for some plastic parts that need high brightness and corrosion resistance can use electroplating to enhance and improve the performance of the steel.

2. Structure design

Mature mold structure not only takes into account the product material properties, shrinkage rate, molding temperature, elastic tensile deformation coefficient, etc. but also takes into account the cooling water circuit, the speed of opening and closing the mold, etc.

Reasonable mold structure can effectively extend the injection mold life and ensure the smooth production of the mold, improve efficiency and reduce costs.

3. Mold processing

If you want to do a good job, you must first make a good tool. The arrangement of the injection molding process is especially important.

A reasonable process arrangement can speed up the production cycle, shorten the processing time and effectively save cost. And more importantly, accurate and reasonable processing can ensure stability and extend the life of the mold in the production process.

Some of the processing errors will lead to mold welding, no matter how good the welding is, it is a loss to the mold; in addition, bad processing may also affect the mold action, reduce the life of the mold, resulting in the mold in the production process of pulling crack or even broken.

4. Standard parts

What determines the capacity of the bucket is the lowest bar. We all understand this truth, but often do not notice it when doing it. The same goes for the mold. Although the standard parts are not directly involved in the molding, they control the operation of the whole mold.

Good standard parts should be able to be wear-resistant, hard enough, high precision, and should not be deformed. Different brands of the standard parts price difference are very big, so do not just kill the price of the mold, your mold from Mercedes-Benz straight down to the public.

5. Clash (flying mold)

The clash relies on the experience of mold pliers, seemingly simple work is the most technical work. Complex molds mainly depend on this kung fu. Flat mold is the most simple, fractal surface as long as there is no flying edge break difference basic on OK.

Like auto parts mold is very troublesome, not only the fractal surface is more irregular, and often includes more than one slider, top block. At the same time, the clash can also improve and perfect other problems of the mold, so it is a comprehensive work.

6. Polishing/skin pattern

The polishing of the mold is the last part of the manufacture of the mold. Polishing reflects directly on the plastic part, so it is the most important work. Polishing can also help and complement the mold action, especially very meaningful for mold release.

Often some mold production is not smooth is because the polishing is not in place, too much resistance, difficult to take off the mold, and even top white, top crack, etc.

7. Mold assembly

The mold assembly is like assembling a machine, each part, and each screw can not be wrong, otherwise, the consequences will be quite serious, the light will lead to product defects, affecting production, and the heavy will completely damage the injection mold,resulting in scrap.

So the assembly work must be very careful. The Assembly process especially pays attention to the clean work of the mold, the waterway, and screw holes, which must be blown clean inside the iron chips.

8. Hot runner or cold runner

This has the least impact on the quality of the mold because the hot runner is generally the brand specified by the customer, especially some large customers. Foreign well-known brands whether in the quality or after-sales service are very in place, so the quality of the general will not have problems.

Just some of the domestic hot runner is a big difference in quality. Individual small enterprises to save costs, and fight for price advantages, with some unreliable heating and conduction accessories, it is easy to have problems. The main problem of the cold runners is how to ensure the balance of injection, gate size, injection pressure, and so on.

9. Cooling water channel

Anyone who has experience in injection molds knows how important cooling is to a mold. Due to the increase in price and labor wage, when mass production of products, the profit brought by not reducing one second of the injection cycle is unimaginable.

But speeding up the production cycle at the same time will be the rise of mold temperature, if not effectively controlled, it will make the mold too hot to mold, or even lead to mold deformation failure scrap. So good water circuit design is especially important, including the density of water circuit arrangement, diameter, the link between each other, and so on.

10. Mold maintenance

Mold maintenance is mainly the maintenance and repair of the production process. Mold is just like a car, if it is not used for a long time and not maintained, it may lead to the scrapping of the mold.

Therefore, every time after using the mold, we should carry out comprehensive maintenance, especially the rust prevention of the injection molding part and the rust prevention of the main action parts.

Because the mold has to receive water during the production process, there may be sleep on the mold during installation or disassembly, so make sure the injection mold is dry, and then brush a layer of oil to protect it.