Why will appear in the process of injection molding plastic pet dog toys bubble, how to avoid?
pet toys some oil extracted from much of the raw materials, the most familiar part of the PC material is refined from the oil, PC material at the time of burning a petrol; ABS are derived from coal,
ABS in burn off when soot shaped; Derived from natural gas, POM POM at the time of burn down there will be a very smelly gas smell.
pet toys manufacturer production injection molding, frequently air trapped inside the plastic part, forming small or into a string of pore gas bubbles, the said it's not a big problem said little not small, but always there will be a really a headache. So the main cause of plastic air bubbles:
one, and if the poor production equipment exhaust system, no exhaust gas in time;
second, if in the production process of injection too fast;
third, if the cooling time of plastic production process control improper cause uneven local temperature;
4, if the production processes of charging too little or too much;
five, production process, the equipment of the holding pressure too low or the holding time is too short;
6, be affected with damp be affected with damp raw materials, high water content caused by water molecules in the produce process or other low molecular volatile matter does not discharge in time;
its seven, plastic raw material in the cylinder is too long time to stay;
the eight, the melt temperature is too high;
plastic bubble solution:
1, increase the mold temperature, reduce the injection time and cycle;
2, design cannot leave thickness disparity is too big of a plastic parts;
3, use good raw materials, to ensure that raw material particle size, don't make the diameter size difference is too large;
4, reproduction materials after drying, water content will control the
5, check the exhaust system, make sure there are no blocked channel
6, control the pressure maintaining parameters.