Characteristics and injection process of PC + ABS injection material

What is PC + ABS material?

PC plastic is a new type of thermoplastic with 90% transparency, so it is called transparent metal. It is very hard, with high impact strength and high dimensional stability, as well as a wide range of application temperature, good electrical insulation, heat resistance and non-toxic properties ABS is a tough and rigid thermoplastic. It is a blend or terpolymer of acrylonitrile, butadiene and styrene. Styrene endows ABS with excellent moldability, gloss and rigidity; acrylonitrile endows ABS with excellent heat resistance, chemical resistance and surface hardness; butadiene endows ABS with great impact strength and low temperature resilience.

What products are PC + ABS suitable for?

PC + ABS is a thermoplastic made of PC and ABS alloy, which combines the excellent properties of the two materials. It is widely used in automobile trim, lampshade, handle and other components; consumer and commercial electrical appliances, such as computers, peripherals and mobile phones; it can replace PC to produce thin-walled products and products with long flow path; camera components, instrument panel, fan cover, safety cap shell, nut, radiator grille, computer and optical instrument shell, hair dryer and coffee Machine and so on.

Injection molding process of PC + ABS:

Drying: it must be dried before processing to keep the humidity below 0.04%. The recommended drying conditions are 90 ° c-110 ° C for 2-4 hours;

Barrel temperature: feed section – 50-70 ° C (70 ° C);

Melting temperature: 230-300 ℃;

Constant barrel temperature: 200 ° C;

mold temperature: 70-90 ° C;

Injection pressure: 80-150mpa (800-1500bar);

Pressure maintaining: 40% – 50% of the injection pressure to avoid product shrinkage; in order to reduce the internal stress of the product to a greater extent, the back pressure should be set as low as possible, i.e. 5-10mpa (50-100bar), to prevent friction heat.

Injection speed: apply medium injection speed to optimize friction heat; for some products, multi-stage injection is recommended from slow to fast injection;

Screw speed: the screw speed is equal to the linear speed of 4.0m/s;

Screw back position: (1.0 to 3.0) d, because the melt is sensitive to overheating and the residence time in the barrel is too long;

The dwell time shall not exceed 6 minutes and shall be as short as possible in the hot runner. The amount of cushion is 2 to 5mm, depending on the screw’s recline position.

About PTJMould Industrial Company Limited

PTJmould is a China mold maker of plastic molds- injection mold, die casting moulds, plastic blow molding, rotational molding, medical plastic injection molding, two shot plastic injection molding, insert molding, overmolding, metal injection molding, micro injection molding, powder injection molding, ceramic injection molding, liquid injection molding, husky injection molding, household mold, casting mold, die mold tool, custom molds, china moulds, rapid prototyping tooling, plastic prototyping tooling, punch press tooling, die and tooling for mobile/ cell phone parts, automotive parts, vacuum cleaners, rechargeable tools, telephones, copiers, computers, multimedia speakers, and many other electronic products and household appliances. And also a plastic product manufacturer, mold manufacturer China– plastic parts, plastic water tank, plastic balls, plastic containers, plastic buckle, plastic anchor, plastic hanger, plastic spoon, plastic pipe fitting, plastic tumble, plastic tableware, plastic cups, plastic bottles, plastic tray, plastic cosmetic container, plastic case, plastic food container, plastic chairs, plastic caps, plastic cap closure, plastic tubes, plastic water pipes, plastic knobs, plastic tubing, plastic utility boxes, plastic racks and so on.