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which safety matter should be pay attention during the plastic mold processing
Jan 24, 2018


1. The shrinkage coefficient of each material is different, and the plastic mold should have reasonable shrinkage.

2. The plastic mold should have sufficient rigidity, otherwise, it will produce deformation when the mold is under pressure, causing "flying edge".

3. The injection molding machine thimble can be set (but some injection molding machines do not have this function) if the product is pushed out by the edge.

4. Select the reasonable mode of stripping, choose the reasonable top bar position and quantity, and ensure that the product is not damaged during the ejection process.

5. The cooling (water channel) in the plastic mold is related to the product size, shape, plastic properties, and pressure maintaining time.

6. The plastic mould should choose reasonable exhaust position and control of its quantity.Otherwise, it will cause the plastic to complain and the product "lack of materials".

7. The plastic mold and the injection molding machine should be fixed in a reasonable manner, so that it should be reliable and firm, so as to prevent accidents caused by changes in the mold.It's easy to disassemble.

8. The plastic mold is moved with the injection molding machine in the condition of no return spring, which is connected with the needle bar of the machine (commonly known as the strong top).

9. The injection channel should be selected reasonably, so that the material can reach each place evenly (the flow path is equal), and there should be enough storage to ensure that the plastic is replenished during the contraction.

10. The post-treatment of plastic mold materials is not required because: plastic is soft and does not require any special requirements of hardness, and the heat treatment process may cause deformation of the mold.

11. The roughness level of the mold cavity of the plastic mold should reach the "mirror level", otherwise the product will not be able to remove the mold, and the product will be damaged due to excessive force when the product is pushed out.The roughness of locating pin, mould surface and other parts is standard.


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