Extrusion molding application of plastic toys
Plastic toys in thermoplastics and rubber processing can be continuously produced, such as ingredients, granulation, rubber filtration, etc., and can produce various continuous products, such as tubes, shapes, plates (or sheets), membranes, etc., with high production efficiency.
-. Granules
are melted on an extruder, and then the polymer is mixed with various additives to further mix evenly. Through the multi-porous mold, multiple strips of materials are formed and then cut into particles. Cutting is divided into hot cutting and cold cutting. After the feed is opened before opening the mold, use a rotating knife to immediately cut it off while cooling it with air or water. The latter method is to cool the strips and send them to a pelletizer.
2. Pipe
material forms a tubular material through the annular gap composed of the mouth mold and the core mold, and then after shaping and cooling, a tubular material with smooth surface, accurate dimensions and geometric shapes are obtained. A common setting method is to use outer diameter setting, that is, through a fixed sleeve with the same inner diameter as the product's outer diameter, the pressure difference is used to make the pipe come into contact with the inner wall of the fixed sleeve, thereby obtaining accurate outer diameter setting. To create a pressure difference, compressed air can be passed into the tube or generated negative pressure outside the tube.
3. Thin plates and films
Any flat products with a thickness greater than 0.25 mm and a length greater than width are called thin sheets, and a thickness less than 0.25 mm is called thin films.
If the film is formed with a flat mouth, it is cooled and set with a very smooth surface cooling drum, and a flat film can be made. This method is also called the extrusion casting method. This method is usually used for polypropylene films. If the obtained flat film is fed into the tenter and stretched 4 to 10 times in the longitudinal and transverse directions (it can also be stretched longitudinally and then transversely), a biaxially oriented film can be made. During the stretching process, the macromolecule orientation makes the film very strong, but the permeability decreases. Commonly used in the manufacture of polypropylene and polyester films. If a foaming agent is added to the material and a special screw and die are used, a low foaming plate can also be made.
4. Covering line
Modified plastic When the metal bare wire passes through the T-shaped mold, a cladding layer is formed around the bare wire. After cooling and curling, various wire and cable products can be made.
5-blown film
Most of the film is made by blowing. The law stipulates that the pipes produced from the mouth mold are inflated by compressed air, and the film bubbles formed are blown cold by the air ring, and then drained by the guide roller (or plywood), and then curled into a roll, which can be made into a blow-molded film. Many packaging bags and agricultural films use this method to make cylindrical films, and are welded and cut.
6. Compound preparation
uses multiple extruders to supply a variety of plastics at the same time, and then extrude through a shared head to form an integrated composite product, which can produce a variety of composite films, composite sheets, plates, shapes, and tubes.
Seventh, melt spinning
When melt spinning, some resins with high viscosity are often extruded for melting materials. The molten material enters the spinneret directly through the filter or is injected into the spinneret by the spinneret pump.
Injection molding Application
Injection molding is a molding method for industrial products. Injection molding can also be divided into injection molding method and die-casting molding method. Injection molding machine (referred to as injection molding machine) is the main equipment for molding thermoplastic or thermosetting materials into plastics in various shapes. Injection molding is accomplished through injection molding machinery and molds.
1. Injection molding
Plastic injection molding is a method of plastic products. The molten plastic is injected into the mold of the plastic product with pressure, and the various plastic products needed are cooled and molded. There is also a dedicated mechanical injection molding machine for injection molding. Polystyrene is the most commonly used plastic at present. The shape obtained by
is usually the final product, and no other processing will be performed before installation or before use as the final product. In one step of injection molding, many details can be formed, such as protrusions, ribs, threads, etc.
2. Rubber injection
Rubber machine injection molding is a production method of directly injecting the rubber in the barrel into the model vulcanization. The advantages of rubber plastic injection molding are: although it is intermittent production, the molding cycle is short and the production efficiency is high. The embryo preparation process is cancelled, labor intensity is reduced, and product quality is excellent.
Article source: Dibo Technology
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