How to choose plastic injection molds steel?

-

How to choose plastic injection molds steel?

How to choose the injection mold steel reasonably is a complicated project, and it is also the key link of the injection mold manufacturing. This is an important task related to the life of the mold and the cost of the injection mold. Generally, the materials used to make plastic injection molds first need to have a certain degree of hardness and abrasion resistance. Second, it should have strength and toughness. Before choosing injection mold steel, we first need to understand the classification of the mold. Molds are usually divided into 5 levels according to their service life:

Level 1: The service life of the mold exceeds one million times.

Level 2: The service life of the mold is 500,000 to 1 million times.

Level 3: The service life of the mold is 300,000 to 500,000 times.

Level 4: The service life of the mold is 100,000 to 300,000 times.

Level 5: The service life of the mold is less than 100,000 times.

In addition, the basic properties of steel need to be understood

1. Steel has sufficient surface hardness and wear resistance.

The surface roughness and dimensional accuracy of plastic parts and the service life of injection molds are directly related to the hardness and wear resistance of the mold surface, especially the molding surface of the mold, such as the core and cavity of the mold. Therefore, it is required that the molding surface of the injection mold has sufficient hardness. For small plastic molds, you can choose high carbon high alloy steel. For large plastic molds, you can choose carburized steel and heat treatment to harden it, so as to obtain higher wear resistance and prolong the service life of the mold.

2. Steel has sufficient strength and toughness.

Because injection molds, especially injection molds, are subjected to large molding pressure during the injection process, large and medium-sized injection molds or injection molds with complex cavity shapes should have high strength and toughness to meet the requirements for use performance.

3. Steel has good processability.

Most injection molds require some machining and benchmarking. In order to extend the service life of cutting tools, improve cutting performance and reduce surface roughness, plastic injection molded steel must have appropriate hardness to obtain the necessary accuracy and surface roughness.

4. Heat treatment deformation is small.

Injection mold parts are usually complex in shape and difficult to process after quenching, or even impossible to process at all. Therefore, steel with a small heat treatment deformation should be selected. In this way, the processing of injection mold parts can be reduced or no longer performed after heat treatment, so that the dimensional accuracy and surface quality requirements of plastic molds can be guaranteed.

5. Has good corrosion resistance

Plastics and additives are chemically corrosive to steel surfaces. Therefore, the selected mold steel should have certain corrosion resistance.

6. Has good polishing performance

In order to obtain smooth plastic parts, the surface roughness of the mold cavity is required to be small, so the mold cavity must be polished to reduce the surface roughness of the mold cavity. Moreover, the selected steel does not have rough impurities and pores, and does not occur during polishing, pitting or orange peel defects

TAIZHOU HEYA PLASTIC MOLD CO., LTD

MOB/WHATSAPP: 86-13867644770



评论

发表评论

此博客中的热门博文

How to set your injection molding machine parameters?

-
图片
 How to set your injection molding machine parameters? Injection Molding Machine Introduction Technology: Polycarbonate injection molding is an engineering technology that involves transforming plastic into useful and original products. Important process conditions for polycarbonate injection molding are temperature, pressure and corresponding individual time of action that affect plasticizing flow and cooling. Injection moulding machine setting – temperature control 1.  Barrel temperature : Temperature to be controlled during moulding process is barrel temperature, nozzle temperature and mold temperature. First two temperatures primarily affect plasticization and flow of plastic, while latter temperature primarily affects flow and cooling of plastic. Each plastic has a different flow temperature. Same plastic has different flow and decomposition temperatures due to different sources or grades. This is due to difference in average molecular weight and distribution. Plastics are injecte
阅读全文

What Is Plastic Injection Mold?

-
图片
  What Is Plastic Injection Mold? A plastic injection tooling is a special type of manufacturing tool used for injection moulding. They are usually made of steel. Essentially, a plastic injection mold consists of a large cavity into which plastic is injected. This plastic flows around the core and the cavity, which have been built to create the proper size and shape of your component. Then, the plastic part solidifies on the mold, and is ejected from the mold once it’s hardened and solidified. Then, this process is repeated. A high-quality thermoplastic mold can be used to make millions of plastic components, and is a must-have if you are creating high-quality, high-volume injection-molded components. Plastic Injection Mold Terms If you are new to the world of injection moulding, there are some key terms you may want to know while working with an injection mold supplier. Injection mould This is a steel or aluminum mold that is used to injection mold plastic parts in a high-volume produ
阅读全文

PLASTIC BUS CHAIR MOULD

-
图片
  PLASTIC BUS CHAIR MOULD HEYA MOLD is professional in mould design and custom production of all kinds of chair mould, we have provided the  plastic bus chair mould  for many customers. The public transport plastic chair is a common public facility in our daily life. The public transport plastic chair requires high strength and certain flexibility. In the shaping process of the bus chair, we generally choose ABS plastic material with good mechanical comprehensive performance. In the design process, we first on the bus plastic chair plastic parts for process analysis, to select the appropriate mould and injection moulding machine, and so on. The bus chair for large plastic parts, accordingly need to design large mould and large injection moulding machine. The mould is suitable for single cavity mould structure, using a single point direct gate injection, plastic parts after stripping, the excess part of artificial resection. The steel material of the bus chair mould is usually 718H, the
阅读全文