Plastic during the injection molding,
in-house products sometimes bloomings appear, and if plastics are transparent
member, it will seriously affect the quality of plastic products, resulting in
product failure, so why have plastic blooming it? When the product bloomings,
plastic products factory is generally how to solve these problems?
1. The vacuum blooming, this blooming
is mainly caused due to plastic shrinkage, plastic wall thickness at the time
of cooling, since the cooling speed of the surface than the intermediate
cooling faster, which would lead to lack of adhesive at the center of the
plastic article , creating a vacuum-like. Solve such vacuum bloomings by
reducing the injection speed, increase the injection pressure, increased
feeding, high melt viscosity grade materials to improve.
2. As the rubber compound ingredients
to hit the gas. Such bloomings can be solved in two ways, 1. lengthen drying
material time, of plastic materials sufficiently dry. 2. Reduce the temperature
of rubber, plastic decomposition avoid more gas.
3. Since the gas illiquid plastic
produced, these bloomings we can be resolved by increasing the resin and
plastic mold temperature, increase the injection rate.
These are the injection molding
process, because plastic bloomings generated and solutions.
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