With the continuous development of China's construction industry, the market demand for rigid polyvinyl chloride pipe and its fittings is increasing. Many township enterprises have been mounted hard PVC injection molding production line. However, due to the weak technical force, the production of poor product quality, high scrap rate, seriously affecting the efficiency of the enterprise. This paper presents the common problems and solutions of PVC pipe fittings.
PVC pipe fittings injection molding common problems
In the injection molding process, there are often molds can not be filled. When the injection molding machine just started, the mold temperature is too low. pvc heat loss of molten material, easy to solidify. Mold cavity resistance, the material can not fill the cavity. This phenomenon is normal. Just temporary continuous injection of digital mold will automatically disappear.
Problem Cause and Solution
The set injection pressure is too low for PVC pipe fittings. The injection pressure can be increased appropriately.
2: Setting time is not enough, can increase the holding pressure time appropriately.
3: Cooling time is not enough, can increase the cooling time appropriately.
4: The amount of solution is not enough, you can increase the amount of solution appropriately.
5: The mold into the water is not uniform, can adjust the cooling circuit, so that the mold of the mold cooling uniform.
6: The size of the mold casting system is small, can increase the casting portal or increase the size of the main, sub, runner section.
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