Brief history of blow molding process in blow molding products processing plant-Ningbo Beilun Jingtong Mold Co., Ltd.

2023/04/26

Author: MULAN -Plastic Molding Manufacturer

Blow molding, also known as hollow blow molding, refers to a molding method in which the molten plastic parison in a closed mold is blown into a hollow product by the pressure of compressed air. The main forms of blow molding in blow molding products processing plants are injection blow molding, extrusion blow molding and stretch blow molding, but the latter cannot independently become a processing method and must be combined with injection blow molding or extrusion blow molding Forming injection stretch blow molding or extrusion stretch blow molding. Blow molding technology was transplanted from glass processing. It originated in the early 1930s and experienced the low-density polyethylene (LDPE) period (1945-1956), high-density polyethylene (HDPE) early stage (1956-1964) years), high-density polyethylene HDPE later period (1965-1970) and polyethylene terephthalate (PET) period (1971-1978), developed to today's highly automated industrial system of blow molding products processing plant file period. Although there are differences in the form of different blow molding processes, the basic steps of the blow molding process are the same, that is, melting the material → making the molten material into a tube or parison → placing the parison in the blow mold for fusion sealing → using Compressed air inflates the parison in the mold → cooling → taking out the product → trimming. At present, plastic blow molding has become the third largest molding method in the world after extrusion molding and injection molding, and it is also the fastest growing plastic molding method. Blow molding products processing plants can use this method to produce containers, industrial parts and daily necessities, as well as auto parts. Plastics suitable for blow molding include LDPE, HDPE, PVC-U, PVC, PS, PP, PC, etc. Z Commonly used or PE and PVC. Proficient in moulds|Blow molding products processing factory| Since 1998, it is trustworthy.

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