Shrinkage rate of Quality Big size injection mold in Shenzhen
Release time:
2023-04-06 11:27
Source:
Quality Big size injection mold in Shenzhen tells you that the main reason why it is difficult to accurately determine the shrinkage rate is that the shrinkage rate of various plastics is not a fixed value, but a range. Quality Big size injection mold in Shenzhen tells you that because the shrinkage rate of the same material produced by different factories is different, even the shrinkage rate of the same material produced by different batches in a factory is not the same.
Quality Big size injection mold in Shenzhen tells you that each factory can only provide users with the shrinkage range of the plastics produced by the factory. Secondly, the actual shrinkage rate during the forming process is also affected by factors such as the shape of the plastic part, mold structure, and forming conditions.
Plastic shape. Quality Big size injection mold in Shenzhen tells you that for the wall thickness of the formed part, generally due to the longer cooling time of the thick wall, the shrinkage rate is also larger. For general plastic parts, when the difference between the dimension L in the flow direction of the molten material and the dimension W perpendicular to the direction of the molten material flow is large, the difference in shrinkage rate is also large.
Quality Big size injection mold in Shenzhen tells you that from the point of view of the melt flow distance, the pressure loss of the part away from the gate is large, so the shrinkage rate there is also larger than that near the gate. Shapes such as ribs, holes, bosses, and engravings are shrink-resistant, so these areas will shrink less.
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