Injection Moulding Manufacturing Process
There are several grades of ABS (especially flame retardant grade), after the plasticizing , its adhesion force is large on the screw, after long time it will decompose. When that happens, we need to pull, wipe and clean up the screw regularly with PS and other plastic material.
injection moulding manufacturing process
1,plastic pre-treatment for abs injection molding
ABS water absorption ratio is about 0.2% -0.8%. for the normal ABS before molding ,itsdrying time in oven is for 2-4 hours at 80-85 ℃ ,or in hopper 80 ℃ at 1-2 hours. if PC material mixed with heat-resistant grade ABS, its drying temperature should be increased to 100 ℃. The proportion of the recycled ABS materials can not exceed 30%, electroplating grade ABS can not be used again at plastic injection moulding manufacturer facilities.
2, mold and gate design
The mold for abs injection temperature can be set to 60-65 ℃. Runner diameter is 6-8mm. Gate width is 3mm, if the thickness of the article should be same as gate, the gate length is less than 1mm. Vent width 4-6mm, and its thickness 0.025-0.05mm.
Melt temperature could be decided by Air injection . Different grades of ABS means that their melt temperatures are also different, we recommend the following settings for plastic injection moulding manufacturer:
Impact resistance grade: 220 ℃ -260 ℃, 250 ℃ better
Plating grade: 250 ℃ -275 ℃, 270 ℃ better
Heat-resistance grade: 240 ℃ -280 ℃, 265 ℃ -270 ℃ better
Flame Retardant grade: 200 ℃ -240 ℃, 220 ℃ -230 ℃ better
Transparent grade: 230 ℃ -260 ℃, 245 ℃ better
Glass fiber reinforced grade: 230 ℃ -270 ℃
High requirements for products surface is, the higher melt temperature and mold temperature should be.
4, the injection speed
Flame Retardant grade with slow speed, Heat-resistance grade with quick speed. abs injection molding products with high surface requirements should take use of high-speed and multi-stage injection rate .
We are a national grade high-tech enterprise which professionally specialized in high precise injection parts, high precise machining parts and stamping parts. Our team have highly skilled manufacturing process for any complex parts, thin wall, micro parts, titanium alloy parts, peek parts etc especially, We provide total solution to customers including products design, molding design, DFM and manufacture, parts mass production and assembly “one-stop service”. As an OEM factory, With the principle of "high-quality, efficiency, honesty and service", the aim of "sustainable operation, customers uppermost" and the good attitude of work and service, we are looking forward to building long-term and win-win business relationships with clients from all over the world.
Xiamen Goldcattle Plastic & Metal Products Co.,
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