Injection molding Tips


Injection molding process, wherein the thermoplastic resin is injected into a mold, cooled and hardened in front of the machine. The end result is a series made of the same plastic articles. Injection molding may be used to make industrial products such as automotive parts or smaller products, such as a plug receiver, camera parts or containers.


Choose your resin in advance

Although you can wait until the last moments of the injection molding process of the game, select and use your resin, the resin earlier picking speed up the process and save time and money. Already considering using resin helps simplify the design of any further design choices along the way, at a later stage, and to reduce the need for additional work. For example, one product has a very thick part of the ABS resin, which is likely to dent the mold thick around the place is not a good idea. Similarly, selecting a set mold polystyrene is a bad idea, thinner regions will simply break due to the brittle nature of the material. A prototype, the freedom to change the resin, if necessary.

Avoid sink marks

Dent of the surface occurs in the mold thicker portion recess or void. When the occurrence of dents, thickness of the resin is cooled at different speeds set portion hardens inside the external heat is still in a molten state, and the edges of the coolness of the contract, which creates a dimple or depression. Industry professionals a trick used is the hollowing out of the thick set of part or core strength and durability still be avoided dent.

Avoid premature freeze

Prior to occur when the thermoplastic resin is cooled and solidified prematurely hardened, the mold has been completely filled. A possible solution is to increase the temperature of the resin, until the mold has been filled, which will keep the thermal material. Another tip is to improve the injection speed, should ensure a thermoplastic resin has fully pumped into the mold before setting. Other tips to avoid premature solidification include mold temperature, injection pressure and to improve the high melt flow rate less than the MFI (melt flow index) level.