ABS blister molding process and performance introduction
ABS is one of the five major synthetic resins.abs blisterIt has excellent impact resistance, heat resistance, low temperature resistance, chemical resistance and electrical properties, easy processing, stable product size, good surface gloss, etc. It is easy to paint and color, and can also be used for surface spraying metal, electroplating, welding, hot pressing, bonding and other secondary processing. ABS plastic is widely used in machinery, automobile, electronic appliances, instrumentation, textile, construction and other industrial fields.
ABS plastic is a high-strength engineering plastics as the main raw material, through absorption and hot pressing molding, plus mechanical processing and other processes, scientific design, elaborate production, to create ABS products. Multi-color, multi-faceted effect processing. ABS plastic products using ABS plastic sheet, can solve the complex surface, multi-faceted effect processing does not need to open the mold. The products produced are not easy to deform, beautiful in appearance, firm in structure, light in weight, low in noise, corrosion resistance and anti-aging.
The blister forming (also known as thermoforming) process is carried out at a temperature below the melting temperature of the ABS sheet and above the glass transition temperature. ABS sheet is always in solid state, which belongs to solid phase molding. Compared with injection molding, ABS plastic molding has the advantages of simple molding equipment, low energy consumption, short molding process cycle, high product strength, and ability to form large and complex shape products. According to the different molding die (die, punch) and the pressure required for molding (vacuum, compressed air), it can be divided into more than a dozen types. But in general, the thermoforming process includes heating, molding, cooling, demoulding and other processes.
The process control in the molding process also has a great influence on the product.abs blisterThe molding process includes bubble blowing, upper mold, plunger pressing, molding, cooling and demolding. Among them, the plate temperature, blow molding pressure, blow molding height, upper mold speed, plunger moving speed, vacuum/evacuation speed, etc. have an impact on the thickness distribution of the product.
ABS plastic not only has good thermal stability, but also is not easy to degrade during processing. In addition, ABS has high water absorption and should be dried before processing. The drying conditions of the product are generally temperature 80~85 ℃, time 2~4h. For products with special requirements (such as electroplating), the drying conditions are 70~80 ℃ and 18~18h.abs blisterIt is easy to produce internal stress during processing, and the size of internal stress can be tested by soaking. If the stress is too high to prohibit stress cracking of the product, it should be annealed. The specific conditions are to be placed in a hot air circulation drying oven at 70~80 ℃ for 2~4h, and then cooled to room temperature.
Xiamen Dacheng
2020-11-20
Xiamen Dacheng supplies ASA blister board and ODM & OEM processing service
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No. 19, Baihuyan Road, Houxi Town, Jimei District, Xiamen, China 503
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E-mail：8001@xmdcsj.cn