First, blow molding products should have outstanding thermal stability; The shape of the parts of the blow molding injection mold is often more complex, difficult to process after quenching, so it should be selected as far as possible with outstanding thermal stability, when the mold molding processing after heat treatment due to the linear expansion coefficient is small, heat treatment deformation is small, the scale change rate caused by the temperature difference is small, the metallographic arrangement and the mold scale is stable, can be cut or no longer processed, To ensure mold scale accuracy and surface roughness requirements. Suzhou blow molding processing
Second, the blow molding product should have excellent machinability; Most blow molding molds, in addition to EMD processing also need to carry out a certain cutting and fitter repair. In order to extend the service life of the cutting tool, improve the cutting function, and reduce the surface roughness, the hardness of the steel used in blow molding mold is necessary to be appropriate.
Third, blow molding products to meet the appearance of hardness and wear resistance; The hardness of the blow mold is usually below 50-60HRC, and the mold should meet the external hardness through heat treatment to ensure that the mold has a satisfied stiffness. The mold in the work because of the filling and flow of blow molding to accept large compressive stress and friction, the mold is required to adhere to the accuracy of the shape and the stability of the scale accuracy, to ensure that the mold has a satisfied service life. The wear resistance of the die depends on the chemical composition of the steel and the hardness of the heat treatment, so improving the hardness of the die is conducive to improving its wear resistance. Shanghai blow molding processing
Fourth, blow molding finished products should have outstanding polishing function; High quality blow molding products require a small roughness value on the surface of the cavity. For example, the surface roughness value of the injection mold cavity is required to be less than the level of Ra0.1 ~ 0.25, the optical surface is required to be Ra<0.01nm, and the cavity must be polished to reduce the surface roughness value. For this purpose, the selected steel requires less impurities, uniform arrangement, no fiber orientation, and should not show pitting or orange peel defects when polishing.
According to its own performance, plastic packaging materials can be divided into: blow molding can be repeatedly melted molding processing and basically maintain its characteristics of thermoplastics and thermosetting plastics can only be melted once. According to its use, it can be divided into a wide range of use, cheap price, good comprehensive performance of general plastics, such as PE,PP,PVC,PS, and amine plastics have good physical and mechanical strength, and may replace metal used in engineering machinery engineering plastics such as: ABS, nylon, polyester,POM,TPX-1, etc. And a class of engineering plastics with particularly good performance, such as: special plastics with particularly good radiation resistance, high temperature resistance, such as: polyaromatic sulfone, liquid crystal polymers, etc. According to the molecular crystal size of thermoplastic resin, thermoplastics can be divided into amorphous polymers and crystalline polymers. The main characteristics of plastics are:
First, the density is small, the specific strength is high, and a higher packaging yield can be obtained, that is, the package volume or the package area size per unit mass.
Second, most plastics have good chemical resistance, good acid resistance, alkali resistance, resistance to all kinds of organic paste, long-term placement, no oxidation.
Third, the molding is easy, the required molding energy consumption is lower than that of metal materials such as steel.
Fourth, it has good transparency and easy coloring.
5, with good strength, high strength per unit weight, impact resistance, easy to modify.
6. Low processing cost.
Seven, excellent insulation.
Packaging industry development in the synthesis, 25% used in the packaging industry, for this plastic packaging industry is an important sector, plastic packaging is one of the four major materials in the packaging industry: paper and cardboard accounted for 30%, plastic accounted for 25%, metal accounted for 25%, glass accounted 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, in fact, the surface is not as good as the packaging of paper and cardboard. But the plastic packaging industry grows at a rate of 5% per year, while other packaging materials, including paper and paperboard, gold, glass, pottery, etc. grow at a rate of only 2%. Therefore, one day the plastic packaging industry will surpass paper and paperboard and become 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 printing and packaging machinery and equipment as the main industries, and the packaging industry pattern in the Yangtze River Delta, Pearl River Delta and Bohai Bay as the key region.
Kunshan Fulong Plastic Hardware Co., Ltd. welcomes new and old customers to come to consult and buy.
