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How To Remove Mold Dents?
Original: Original | Author: DGMF Mold Clamps | Publish Time: 2020-12-14 | 3925 Views | Share:
1. Causes of dents
2. Related knowledge
3. The solution
4. Differences in materials
5. References

How To Remove Mold Dents - DGMF Mold Clamps Co., Ltd


1. Causes of dents


1.1 The thickness of each part of the product is different


1.2 Insufficient pressure inside the mold


1.3 Insufficient mold cooling


1.4 Deformation due to the insufficient cooling time


2. Related knowledge


2.1 In the process of producing products, dents are the most frequent occurrence of undesirable phenomena.

The plastic injected into the mold shrinks in volume when it is cooled. The early cooling part, that is, the surface hardens first, and bubbles will be generated inside. The so-called dent is slow cooling. The part of the bubble produces a conspicuous concave surface in the direction of the bubble shrinkage.


2.2 Materials with large shrinkage are also prone to dents. When changing the molding conditions to eliminate dents, the setting conditions should be set in the direction of small shrinkage.


That is, the mold temperature and barrel temperature decrease, and the injection pressure increases, but it should be noted that this may cause residual internal stress.