Suzhou ASA LI968W weather resistance

Model performance: Co-extruded, good weather resistance.
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. Engineering plastics are graft copolymers of acrylic rubber, acrylonitrile and styrene. Its structure is as follows
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< :r . < :r . . The source of plastics. Plastic raw materials usually come from petrochemicals that use oil or natural gas as raw materials. They are polymer resins obtained through polymerization reactions. Plastic definition: a polymer compound with synthetic resin as the main component. Polymer: Molecular weight > Medium molecular weight, low molecular weight, three forms of plastic: glassy state, high elasticity, viscous flow state instead of solid, liquid and gaseous states. It is impossible to have liquid and gaseous states (it will decompose before reaching that temperature) ) Types and introduction:. Injection molding (injection molding). Compression molding. Extrusion molding. Extrusion molding. Blow molding, blister molding, casting molding, foam molding. The injection principle uses the thermoplasticity of plastic to first process the plastic raw materials. The screw rotates and friction generates heat and the material tube's electric heating assists in dissolving it into a fluid state and then injecting it into the designed model cavity through injection pressure. After cooling, it is taken out to form molded products of various shapes. Injection molding: process: process: raw material drying Heating, storing, plasticizing, injecting into the mold, cooling and demoulding products. The basic process of plastic injection molding: pressurizing the movable mold to fill the injection molding material, maintaining pressure and solidifying, then loosening, closing, opening and ejecting the mold.
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. Plastic molding machine conditions for plastic raw materials:? Five major elements of molding conditions: pressure, injection pressure: control melt filling. Holding pressure: Control the melt to prevent backflow after filling. Back pressure: controls resin melting. Clamping pressure: controls the speed at which the mold is not punched open. Speed storage (r value): controls resin melting. Firing rate: Controls resin filling. Holding speed: Control the recovery of resin during cooling. Mold opening and closing speed: controls the movement of the mold. Temperature tube temperature: controls the melting of plastic. Original drying temperature: control the original moisture content. Mold temperature: controls the crystallinity and cooling of the melt. Time injection time: control melt filling. Cooling time: Control the melt solidification. Mold opening and closing time: control mold transportation. Intermediate time: Control the pause after mold opening. Position injection range: control melt filling. Mold opening and closing process: control the mold process. Robotic process: controls the clamping head. Classification of plastics according to plasticizing properties: thermoplastics and thermosetting plastics. Thermoplastics: Plastics can continue to be heated and softened after they are heated and softened. Thermosetting plastics: Plastics cannot be softened and molded by continued heating (bakelite) after being heated and softened. , divided by use: general plastics and engineering plastics. General plastics: have common properties of plastics and can be widely used in production. Four general plastics: Engineering plastics: have special mechanical properties and can be used as engineering materials. . , According to crystallization: crystalline plastic raw materials and amorphous plastics. Crystalline plastics: molecular chains are arranged in order (,) Amorphous plastic: molecular chains are arranged in disorder ()
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:r .The application of plastic raw materials ranges from tiny gear screws to household appliances, phones, cleaning tools, and even cars, computers, medical equipment, etc. The applications of plastic in life are endless. I think plastic is kind to people. Covering it with the soft and bright properties of plastic can cover up the cold light emitted by the machine, making it easier for humans to get along with the machine. Therefore plastic has become indispensable in daily life. As a bridge between humans and high technology, plastics have endless potential to be developed. Here I will discuss with you some common knowledge about plastic products from the following aspects. Formula technology: Resin is mainly produced by blending technology. The main raw materials are powder and resin, as well as colorants, antioxidants, internal and external lubricants, etc. The main equipment is a twin-screw extruder. Other supporting equipment also includes high-speed batching machines, automatic weighing feeders, cooling granulators, automatic packaging machines, and quality inspection equipment (melt finger universal testing machines, etc.). When the production reaches a certain scale Finished product silos are also required.