Plastic process molding process Plastic sheet production line
DATE：2021/2/24 8:49:56 / READ： / SOURCE：This station
Plastic process molding process
Plastic sheet production line
There are various processing methods for high molecular polymers such as plastics. Each method has its advantages and disadvantages and is more suitable for specific applications. Next, let's see how they are processed!Injection molding machine
Injection Molding
Injection molding is a manufacturing method of manufacturing parts by injecting materials into molds. The main method of processing plastic is injection molding. In this process, the plastic is placed in the hopper, and then the hopper heats and injects the plastic, which is pushed through a long chamber and a reciprocating screw. After that, it is softened into a fluid state. The nozzle is located at the end of the chamber, and the fluid plastic is forced to cool through the nozzle, closing the mold. When the plastic cools and solidifies, the semi-finished product exits the press. Plastic sheet production line hamdern.com
Plastic extrusion
Plastic Extrusion
Plastic extrusion is a mass manufacturing method in which plastic raw materials are melted to form a continuous contour. The extrusion process is usually used to make films, continuous sheets, tubes, profiles, rods, outer wires, filaments, threads, and cables. Together with the injection molding machine, the dried plastic is placed in a hopper and sent into a long heating chamber. At the end of the cavity, the material is pressed out of a small opening, or mold in the shape of the desired final product. After the plastic leaves the mold, it is placed on a conveyor belt to cool. A blower is sometimes used in this process to help it cool down.
Blow molding machine
Blow Molding
Blow molding is a molding method for manufacturing hollow plastic products. It is a secondary molding technology that uses gas pressure to inflate the rubber-like parison closed in the mold cavity into a hollow product.
Thermoforming
Thermoforming
A special plastic processing method for processing thermoplastic plastic sheets into various products. The sheet material is clamped on the frame and heated to a softened state, and under the action of external force, it is made to close to the molding surface of the mold to obtain a shape similar to the molding surface. After cooling and shaping, the finished product is finished. This process is also used in rubber processing. In recent years, thermoforming has made new progress, such as continuous production technology from extruding sheet to thermoforming.
Plastic sheet production line hamdern.com
Compression molding
Compression Molding
Compression molding is the most commonly used method for thermoset materials and is not usually used for thermoplastics. During this process, the material is extruded into the desired shape. Plastic molding powder and other materials are added to the mixture to produce special qualities. When the mold is closed and heated, the material hardens to form its desired shape. The temperature, pressure and length of time used in the process depend on the desired result.
Calender
Also known as calendering. The last process of heavy leather finishing. The plasticity of the fiber under mixed heat conditions is used to flatten the surface of the fabric or roll out parallel fine diagonal lines to enhance the finishing process of the fabric gloss. After the material is fed, it is heated and melted, then formed into a sheet or film, and then cooled and rolled up. The most commonly used calendering material is polyvinyl chloride.
Extrusion
Pultrusion
In extrusion molding, the blank is extruded from the orifice or gap of the die under the action of three-way uneven compressive stress to reduce the cross-sectional area and increase the length. The processing method that becomes the required product is called extrusion. This processing of the blank Called extrusion molding. Plastic sheet production line hamdern.com
Vacuum forming
Vacuum Forming
Vacuum forming (Vacuum Forming) is often called blister. It is a plastic processing technology. The main principle is to heat a flat plastic hard sheet to soften it, then use vacuum to absorb it on the surface of the mold and cool it to form. It is widely used in plastic packaging. , Lighting, advertising, decoration and other industries.
Rotational molding
Rotational Molding
Rotational molding is also called rotational molding, rotational molding, rotational molding, rotational casting, and rotational molding. Rotational molding process is to first add plastic raw materials into the mold, and then the mold is continuously rotated along two vertical axes and heated, so that the plastic raw materials in the mold gradually uniformly coat and melt adhere to the mold under the action of gravity and thermal energy. The whole surface of the cavity is formed into the required shape, and then cooled and shaped, demolded, and finally the product is obtained.
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