Overview of blown plastics
Blow molding is also called hollow blow molding, a rapidly developing plastic processing method. The blow molding process began during the Second World War to produce low-density polyethylene vials. In the late 1950s, with the birth of high-density polyethylene and the development of blow molding machines, blow molding technology was widely used. The volume of hollow containers can reach several thousand liters, and some productions have been computer controlled. Suitable plastics for blow molding are polyethylene, polyvinyl chloride, polypropylene, polyester, etc. The resulting empty containers are widely used as industrial packaging containers. Blow molding can be divided into extrusion blow molding and injection blow molding according to a method for producing a parison. Newly developed blow molding and stretch blow molding are newly developed.
A combined plastic mold for compression molding, extrusion molding, injection molding, blow molding and low foam molding, which mainly comprises a combination of a female mold combination base plate, a female mold assembly and a female mold combination card board. Cavity. The female mold includes a punch having a variable core consisting of a male mold combination substrate, a male mold assembly, a male mold combination card board, a cavity cutting assembly and a side cut combination board. Convexity of the mold, the concave surface and the coordinated change of the auxiliary molding system.
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