The wall thickness of plastic parts has a great impact on its quality. Wall thickness is too small, the flow resistance, large and complex products will be difficult to fill the cavity. The minimum size of the wall thickness of the workpiece shall meet the following requirements:
⒈ with sufficient strength and stiffness;
⒉ stripping can withstand the impact of stripping mechanism and vibration;
⒊ assembly can withstand tightening force.
Plastic parts processing
General plastic processing plants are required to have a minimum wall thickness, due to plastic varieties, grades and products vary in size. Thickness is not only a waste of raw materials, the thermosetting plastic molding process, but also increased the molding time, and easily lead to incomplete curing; and for thermoplastic, then increase the cooling time (according to experience, Doubled, the cooling time will increase four times). Also affect the quality of the product, such as prone to bubbles, shrinkage, warping and other defects.
Thermosetting plastic small plastic parts processing, wall thickness generally take 1.6 ~ 2.5mm, large parts take 3.2 ~ 8mm. Buji phenolic plastic and other poor mobility of the species should take a larger value, but generally should not be greater than 10mm. Fragile plastic parts processing wall thickness should not be less than 3.2mm. Precision plastic parts processing |
