Литье под давлением из полипропилена
PP injection molding has the advantages of fast injection molding speed, high production efficiency, and low cost. The products manufactured by it have smooth surface, stable size, good mechanical properties and heat resistance, and are widely used in автозапчасти, electrical appliances, toys, and mechanical parts. , furniture, packaging and other fields.
PP Injection Moulding Process
The polypropylene injection molding process is a manufacturing process used to create plastic parts made of polypropylene. Our company uses PP materials to mass-produce injection molding parts with complex shapes, high precision and good consistency.
1. PP material preparation
Feed the polypropylene pellets into the corresponding injection molding machine hopper. Dry the plastic pellets to remove moisture.
2. to melt
olypropylene pellets are melted and heated to temperatures between 204°C and 260°C, depending on the polypropylene material grade selected.
3. Injection
Molten polypropylene is injected under high pressure into the mold cavity through a hot runner system. The molten plastic fills the entire cavity and takes shape.
4. Cooling
After the mold cavity is filled with molten plastic, the mold is cooled with water or air to solidify the plastic part and ensure uniformity.
5. Ejection
After the plastic part has cooled and hardened, the mold is opened and the part is ejected using a robotic arm or other automated ejection system.
6. Finishing
After processing techniques such as trimming, drilling and final inspection, ensure that PP injection molded parts meet the requirements
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Application of PP Injection Moulding
The proportion of PP resin used in injection molding products can account for about half. Among them, ordinary PP is used as raw material for daily necessities, reinforced or toughened PP is used as raw material for auto parts, and copolymerized polypropylene PPC with high impact strength and low embrittlement temperature is the main raw material for other uses.
Car Parts
PP material has good weather resistance and impact resistance, so it is often used in the manufacture of automotive interior and exterior parts, such as instrument panels, door trims, trunk panels, etc.
Home appliance accessories
Because PP material has good heat resistance and chemical stability, it is often used to produce accessories for home appliances such as TV sets, refrigerators, and washing machines.
Medical instruments
PP material is non-toxic and tasteless, has very good heat resistance and corrosion resistance, and is often used in the production of medical devices, such as infusion bottles, syringes, surgical instruments, etc.
Packing box
PP material has good transparency and gloss, and is also relatively hard, so it is usually used to produce some packaging boxes and containers, such as food packaging boxes, beverage bottle caps, etc.
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