ABS properties:
1.The comprehensive performance is good, the impact strength is high, the chemical stability and the electrical properties are good.
2.It has good weldability with 372 plexiglass, and is made into two-color plastic parts, and can be chrome-plated and painted.
3.There are high impact resistance, high heat resistance, flame retardant, reinforced, transparent and other grades.
4.It is suitable for the production of general mechanical parts, anti-wear and wear-resistant parts, transmission parts and telecommunication parts.
5.Molding properties
6.Amorphous material, medium fluidity, large moisture absorption, must be fully dried, the surface of the glossy plastic parts must be preheated and dried for a long time 80-90 degrees, 3 hours.
7.It is advisable to take high material temperature and high mold temperature, but the material temperature is too high and easy to decompose (the decomposition temperature is >270 degrees). Thermoplastic parts, the mold temperature should be 60-80 degrees.
8.If you need to solve the water inclusion, you need to improve the fluidity of the material, adopt methods such as high material temperature, high mold temperature, or change the water level.
9.If the heat-resistant or flame-retardant material is formed, plastic decomposition will remain on the surface of the mold after 3-7 days of production, resulting in the shiny surface of the mold, and the mold needs to be cleaned in time, and the exhaust position of the mold surface needs to be increased.
10.The cooling speed is fast, the mold pouring system should be coarse and short, the cold material cavity should be set up, and the gate should be large, such as: direct gate, disc gate or fan gate, etc., but the internal stress should be prevented from increasing, and the adjustment gate can be used if necessary. The mold should be heated, and wear-resistant steel should be used.
11.The material temperature has a great impact on the quality of the plastic parts, the material temperature is too low to cause a lack of material, the surface is dull, the silver wire is disordered, the material temperature is too high and easy to overflow, the silver wire is dark, and the plastic parts are discolored and blistered.
12.Mold temperature has a great influence on the quality of plastic parts, shrinkage, elongation, impact strength, bending, compression, tensile strength are low when the mold temperature is low. When the mold temperature exceeds 120 degrees, the plastic parts are cooled slowly, easy to deform and stick to the mold, difficult to demold, and the molding cycle is long.
13.The molding shrinkage is small, easy to melt cracking, and stress concentration, so the molding conditions should be strictly controlled during molding, and the plastic parts should be annealed after molding.
14.For plastic parts larger than 200 grams, a screw injection machine should be used, the nozzle should be heated, and an open extension nozzle should be used, and the injection speed should be medium to high speed.
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