Vacuum forming molds, materials and production processes
Release time:
2024-04-07
Vacuum forming can be divided into vacuum forming and pressure forming, pressure forming is based on vacuum forming technology has been improved, higher efficiency, faster, is an upgraded version of vacuum forming. Whether vacuum forming, or air forming, both are through the same process of production:
1. Mold design and production
2. Purchase of vacuum forming materials
3. Vacuum (compressed air) forming production
4, product inspection package shipment
at present, the common vacuum forming materials include hips, pp, pet, pvc, pp, abs, pe, etc.... among them, hips and pp are mainly produced from white and black materials, hips are brittle, while pp materials are tough; in addition, pet and pvc are mainly produced from transparent materials, pvc is relatively tough, but EU, Japan, Australia and other countries prohibit pvc import due to environmental protection reasons; PE, ABS market share is relatively small. The above materials can be made of various color materials according to customer requirements.
Mold making. Vacuum forming is generally divided into plaster mold, copper mold, aluminum mold. Gypsum molds are generally used for trial samples, and copper molds are mostly used for mass production. Large quantity and high quality requirements of the product will choose aluminum mold production. Because of the brittle characteristics of gypsum, it is not suitable for mass production. Copper mold is filled with gypsum after copper electrolysis. Mass production takes a long time, the separation of gypsum and copper from the shell causes product deformation, and the aluminum mold has a long life and good quality! However, due to the high precision and fast speed of the compressed air mold, the mold design must consider the cold water circulation cooling after the vacuum forming mold is heated. Mold materials must be made of aluminum and steel materials by cnc processing, and the cost is more than 10 times that of vacuum aluminum molds.
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