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How is the plastic turnover box made?

by:Qusheng     2021-02-24
How is the plastic crates made? There are many characteristics of plastic crates. Good impact resistance, light weight, safety and health, long service life, etc., can replace wooden boxes, cartons and other transportation packaging containers, and are widely used in food and beverage industries. It is generally made in two ways. 1. Hot extrusion and cold pressing. The raw materials for making plastic turnover boxes mainly include plastic materials such as high-density polyethylene, copolymer polypropylene and polyvinyl chloride. Plastic turnover boxes are produced by hot extrusion and cold pressing, with low equipment investment, low energy consumption, simple structure and low technical requirements, but low production efficiency, rough surface of the product, poor mechanical properties, and less use in actual production. The process flow is as follows: resin ingredients -u003e dyeing -u003e melt extrusion -u003e storage tank insulation -u003e die casting -u003e finishing. 2. Injection molding. Plastic turnover boxes are the same as plastic pallets. In addition to hot extrusion and cold pressing, injection molding is most commonly used for production. Injection molding is also called injection molding or injection molding. Its principle is similar to the principle and operation method of injection syringes, so some people call this The process is injection molding. Injection molding is suitable for molding processing of various thermoplastics and some thermosetting plastics. Feed the powdery or granular plastic from the hopper of the injection machine into the barrel for heating to melt the plastic, reach a fluid state and have good plasticity, and then inject the temperature through the nozzle at the front of the barrel under the push of a plunger (or screw) In the lower cavity, after cooling and shaping, the mold is opened to obtain plastic products. The process is as follows: feeding -u003e heating plasticization -u003e injection -u003e shaping -u003e demoulding. At present, the most used injection molding machine is the horizontal moving screw injection molding machine. Injection molding equipment requires large investment, complex mold structure, and high processing cost, making it suitable for mass production.
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