Conventional molds for standard product and thin wall plastic mold is very different in structure and system. Let's see the difference below.

First, the cooling system has changed. Thin-walled products are not as capable of withstanding large residual stresses caused by uneven heat transfer as traditional thick-walled parts. In order to ensure the dimensional stability of the product and to control shrinkage and warpage within an acceptable range, it is necessary to strengthen the cooling of the mold to ensure balanced cooling. Better cooling measures include using unclosed cooling lines in the core and cavity modules, and increasing the cooling length can enhance the cooling effect. If necessary, add highly conductive metal inserts to speed up heat transfer.

The second is the change in the exhaust system. Thin-wall injection molds usually need to have good exhaust performance, and it is best to perform vacuum operation. Due to the short filling time and high injection speed, it is very important to completely empty the mold, especially in the collection area at the flow front, to prevent the trapped air from catching fire. The gas is usually discharged through the core, ejector pins, stiffeners, studs and parting surfaces. The end of the runner should also be completely exhausted.

Finally, the demolding system has changed. Because the walls and ribs of thin-walled products are very thin, they are easily damaged, and the shrinkage in the thickness direction is small, making it easy to bond the ribs and other small structures, and the high packaging pressure makes the shrinkage smaller. In order to avoid mold release and mold adhesion, thin-wall injection molding should use a larger number and larger size of ejector pins than traditional injection molding.

The difference between thin-walled plastic mold and plastic pipe fitting injection mould or some other mold is still very obvious. Therefore, no matter which type of mold, there will be some differences to different degrees. If you want to make a mold, you need to understand it one by one from the perspective of shape, structure or each system to make a more complete and better mold.