1. Blow-molded finished products must have good thermal stability; the shape of parts of blow-molded injection molds is often complex and difficult to process after quenching. Therefore, one with excellent thermal stability should be selected as far as possible. The expansion coefficient is small, the heat treatment deformation is small, the dimensional change rate caused by the temperature difference is small, the metallographic structure and the mold size are stable, and the mold size accuracy and surface roughness requirements can be ensured by reducing or no longer processing. Suzhou blow molding processing

2. Blow molding products must have excellent machinability; most blow molding molds require certain machining and fitter repairs in addition to EMD processing. In order to extend the service life of the cutting tool, improve the cutting performance, and reduce the surface roughness, the hardness of the steel for blow molding must be appropriate.

3. Blow molding products should have satisfactory surface hardness and wear resistance; the hardness of blow molding molds is usually below 50-60HRC, and the heat-treated molds should have satisfactory surface hardness to ensure that the molds have satisfactory rigidity. During the operation of the mold, due to the filling and flow of blow molding, it has to accept large compressive stress and friction. The mold is required to maintain the stability of shape accuracy and dimensional accuracy to ensure that the mold has a satisfactory service life. The wear resistance of the mold depends on the chemical composition of the steel and the hardness of the heat treatment, so increasing the hardness of the mold is conducive to improving its wear resistance. Shanghai blow molding processing

4. The blow-molded finished product must have excellent polishing performance; for high-quality blow-molded finished products, the roughness value of the cavity surface is required to be small. For example, the surface roughness value of the injection mold cavity is required to be less than Ra0.1~0.25, and the optical surface is required to be Ra<0.01nm, and the cavity must be polished to reduce the surface roughness value. The steel selected for this purpose requires less material impurities, fine and uniform structure, no fiber orientation, and no pitting or orange peel defects during polishing.

According to its own performance, plastics can be divided into two categories: thermoplastics that can be melted and molded for many times and can basically maintain their characteristics and thermosetting plastics that can only be melted once. According to its use, it can be divided into general-purpose plastics with wide application, low price and good comprehensive performance, such as PE, PP, PVC, PS, and amine-based plastics, which have good physical and mechanical strength and may be used in construction machinery instead of metal. Engineering plastics such as: ABS, nylon, polyester, POM, TPX-1, etc. And a class of engineering plastics with particularly good properties, such as: special plastics with particularly good radiation resistance, high temperature resistance, etc., such as: polyarylsulfone, liquid crystal polymer, etc. According to the molecular crystal size of thermoplastic resins, thermoplastics can be divided into two types: amorphous polymers and crystalline polymers. Main properties The main properties of plastics are:

1. Low density, high specific strength, can obtain higher packaging yield, that is, "packaging volume per unit mass or packaging area size.

2. Most plastics have good chemical resistance, good acid resistance, alkali resistance and resistance to various organic additives. They will not be oxidized if they are placed for a long time.

3. It is easy to form, and the energy consumption required for forming is lower than that of metal materials such as steel.Fourth, it has good transparency and easy coloring.

5. It has good strength, high strength per unit weight, impact resistance and easy modification.

6. Low processing cost.

7. Excellent insulation.

In the development of the packaging industry, 25% is used in the packaging industry, which is an important sector in the plastic packaging industry. Plastic packaging is one of the four major materials in the packaging industry: paper and cardboard account for 30%, plastics account for 25%, Metal accounts for 25% and glass accounts for 15%. The above two 25% fully illustrate the importance of the plastic packaging industry. Although the plastic packaging industry is the second packaging material, its practicality is not as good as that of paper and cardboard packaging. However, the plastic packaging industry is developing at a rate of 5% every year, while other packaging materials, including paper and cardboard, metal, glass, pottery, linen and cotton, are only growing at a rate of 2%. It will surpass paper and cardboard as the first packaging material. China's modern packaging industry has developed rapidly since the implementation of the reform and opening-up policy. After 30 years of development, China's packaging industry has become an independent, complete and complete industrial system with paper, plastic, metal, glass, packaging and printing and packaging machinery and equipment as its main industries. The packaging industry pattern in the key area of Bohai Bay.

Kunshan Fulong Plastic Hardware Co., Ltd. welcomes new and old customers to come to consult and purchase.