Automotive injection mould in china tells about the knowledge of molds that generate bubbles during the injection molding process
Release time:
2021-10-20 09:28
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Why do bubbles appear in the product during the injection molding process? If you want to know, just follow the editor of Automotive injection mould in china to have a simple understanding!
1. Defects in mold design. Such as: poor gate position, too small gate, asymmetric gate arrangement of multi-gate parts, small runners, unreasonable mold cooling system, so that the mold temperature difference is too large, etc., causing the melt to flow in the mold cavity. Continuously, blocking the air passage.
2. The mold parting surface lacks required vents or vents are insufficient, blocked, poorly positioned, and there is no processing gap such as inserts, thimble, etc. to vent, resulting in the air in the cavity not being able to enter the plastic at the same time Leave.
3. The surface roughness of the mold is poor, and the frictional resistance is large, causing local hot spots and decomposing the passing plastic.
To sum up, the editor of Automotive injection mould in china tells about the introduction of the knowledge about bubbles appearing in the injection moulding process.
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