In the Air Cooler Mould, we often see that plastic products are short of materials, resulting in stress cracks, paste spots, dents, silver streaks, deformation, cracks, reticular cracks, whitening, fusion marks and other problems, which will affect the quality of air cooler mould products. So, how do we solve these problems in air cooler mould processing?
1. Raise the temperature of the air cooler mould, add the temperature of the charging barrel, increase the injection pressure, and add a gas escape groove (depth 0.02~0.04mm) with a width of 5~10mm on the parting surface. Enlarge the gate and enlarge the flow edge. When there are more than a few dies per die, the gate of that die cavity will be enlarged due to lack of material in that die cavity. In addition, the configuration of the flow edge will be changed and the gas escape pin will be added to improve the smoothness of the air cooler die.
2. Raise the injection pressure, extend the injection pressure holding time, reduce the temperature of the charging barrel and the temperature of the air cooler mould, and forcibly cool the place where dents are generated. Fill the upper edge where the dent is made. When there is a narrow place on the material passing edge of the place where the dent is formed, the edge shall be thick. Differences in thickness of designed products should be completely avoided. Reinforcing ribs prone to dents shall be as short as possible in narrow shape.
3. Avoid the difference in the thickness of the designed products, and add a gate where the thickness of the products is thick. Fully cool and solidify in the air cooler mould (a timer for prolonging the cooling time), increase the temperature of the charging barrel, reduce the injection pressure, and make the air cooler mould cool evenly.
4. To avoid the difference of product thickness, gate is set at the place where the product thickness is large, because straight line is easy to cause warping, making large R curve, air cooler mould where the product is reversibly bent, increasing the number of ejector rods and increasing the demoulding slope.
5. Avoid designing different thickness of products, add gates at places with thick thickness of products, understand the occasion of using products, and try to use materials with good fluidity if appropriate. Completely dry the material. Drying at high temperature for a short period of time is not effective. Generally, drying at 85℃ for 4 hours increases the mould temperature of the air cooler, lowers the temperature of the heating cylinder, and keeps the injection nozzle of the cylinder warm to coarsen the flow edge.
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