Author: MULAN -Plastic Molding Manufacturer
When processing our plastic molds, how to improve the precision of the molds? First of all, we must know which aspects affect the processing precision of plastic molds. So what are the precautions in the process of plastic mold processing? The following editors from Shanghai Plastic Mold Factory Xingye will introduce them. 1. The shrinkage coefficient of each material is different, and the plastic mold should have a reasonable shrinkage rate.
2. The plastic mold should have sufficient rigidity, otherwise it will be deformed when the mold is clamped and kept under pressure, resulting in flash. 3. If you eject the product while opening the mold, you can set the ejector page of the injection molding machine (but some injection molding machines do not have this function). 4. Choose a reasonable demoulding method, choose a reasonable position and quantity of ejector pins, and ensure that the product is not damaged during the ejection process.
5. The water passage in the plastic mold is related to factors such as product size, shape, plastic properties, and pressure holding time. 6. The plastic mold should choose a reasonable exhaust position and control amount. Otherwise, it will cause plastic injection dissatisfaction and product shortage.
7. The fixing method of the plastic mold and the injection molding machine should be reasonable, reliable and firm to prevent accidents caused by displacement during mold closing. Easy to disassemble. 8. The plastic mold moves the mold part together with the injection molding machine without a return spring, and the mold ejector plate is connected with the machine ejector rod (commonly known as strong ejector).
9. The injection channel should be selected reasonably so that the material can reach every place evenly (equal flow path), and there is enough storage to ensure that the plastic is replenished during the shrinking process. 10. There is no need for post-processing of plastic mold materials, because the plastic is soft and does not require special requirements such as hardness, and the heat treatment process may cause mold deformation. 11. The roughness level in the cavity of the plastic mold should reach the mirror level, otherwise the product will be difficult to demould, and the product will be ejected with excessive force, resulting in product damage.
There are standards for the roughness of positioning pins and mold surfaces. For more information about injection molds, please visit the official website of Xingye: http://www.dgxingyesj.com/.