Extrusion blow molding is a method of manufacturing hollow thermoplastic parts. Well-known blow molding objects are bottles, buckets, cans, boxes, and all containers that package food, beverages, cosmetics, medicines, and daily necessities. Large blow molding containers are commonly used in the packaging of chemical products, lubricants and bulk materials.
Other blow molded products include balls, bellows and toys. For the automotive industry, fuel tanks, car shock absorbers, children's car safety seats, center brackets, and armrests and headrest covers are blow molded. For machinery and furniture manufacturing, blow molded parts are shells, door frames, frames, clay POTS, or boxes with an open side.
The more common blow-extruded plastic raw material is high-density polyethylene PE, which is usually made of most milk. Other polyolefins are also often processed by blow molding. Depending on the use, styrene polymers PS, PVC, polyester, polyurethane, polycarbonate and other thermoplastics can also be used for blow molding. Engineering plastics have recently been widely accepted in the automotive industry. Material selection is based on mechanical strength, weather resistance, electrical properties, optical properties and other properties.
In the processing and adjustment of blow molding products, the control of mold wall thickness is very important to improve product quality and reduce production costs, so early machines have used two-stage oil pressure to control the two positions of the mold core shaft gap, that is, only thick or thin two effects. In order to meet the requirements of higher and higher accuracy and stability of blow molding products, the modern embryonic wall thickness control system has been equipped with and made use of servo oil pressure system and computer to form multi-stage control, thus greatly improving the quality of products. Kunshan blow molding processing
Products in the blow molding process to accurately control, can make the finished product of the embryo wall thickness to achieve the same, through the impact resistance experiment found that the wall thickness of the same product not only use less material, but also its impact strength is higher, so, in the blow molding machine to add the wall thickness control system, you can obtain higher productivity. Reduce material costs, increase production, shorten the cooling time of finished products, that is, improve the overall production profit. Shanghai blow molding processing
If the product is not controlled in the process of blowing molding, the thickness of the embryo wall after cooling will be uneven, and these thinner positions are easier to break in the impact resistance experiment. The reason is that during the cooling process, the different thickness of the embryo wall produces different stress results, which reduces the quality of the product. If the mandrel gap can be changed with the position of different types of embryos to produce products with more uniform wall thickness, the problem of easy rupture due to different embryonic wall thickness will be solved.
Kunshan Fulong Plastic Hardware Co., Ltd. year round a large number of blow molding processing products, welcome new and old customers to come to consult and buy.
