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Injection mold failure of a few troubleshooting tips
Release time:
Jun 23,2023
Briefly describe the influence of mold temperature on product deformation?
In terms of mold, the factors affecting the deformation of plastic parts are mainly pouring system, cooling system and ejection system.
For the control of mold temperature, should be based on the structural characteristics of the product to determine the moving mold and fixed mold, mold core and mold wall, mold wall and the temperature difference between the inserts, so as to use the control of the product parts of the cooling contraction rate of different.
After the product is demolded, it tends to bend to the higher temperature side of the traction direction characteristics, to offset the difference in orientation shrinkage, to avoid deformation of the product according to the orientation law. For the product shape of the product is identical, the mold temperature should be maintained accordingly, so that the cooling of all parts of the product is balanced.
If a product is not completely filled and there are flying edges at the same time in the production process, what are the possible reasons?
Gap between the moving and fixed mold nuts against the broken surface.
Poor mold venting
Insufficient machine clamping force
Foreign matter on the mold surface
Why is the back-off process after plasticizing necessary? How to optimize it?
Suction back or big or small will directly affect the product quality problems, big easy to cause the product surface with silver wire, small products are easy to have a residual amount of unstable, unstable quality of the product, the mold runner overflow, the water spout draws silk and so on. General experience value should not be less than 5mm.
How to optimize: According to the empirical value in the actual production of the product to see the bad phenomenon of up and down fine-tuning, until the overflow does not produce and hit the qualified products.
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