Injection mold inserts are referred to mold accessories used to be embedded in the core of injection molds, which require high precision. So why bother making inserts during injection molding?

The main purposes are as follows:

1. Save materials for injection mold manufacturing
As is well known, the fixing material for injection molds is a relatively regular block shaped steel, but the material of the front and rear molds is determined by the height of z. Whether it is the front or rear mold, if one place is higher than others, inserts can be made to reduce the height of the mold.

2. Convenient mold modification
The parts that are frequently modified in injection molds can be removed and made into inserts. In the future, when changing the mold, only the inserts can be replaced, and even a few more inserts can be made during mold opening to facilitate mold modification.

plastic injection mold

3. Beneficial for exhaust of injection molds
Venting of injection molds is of vital importance; insufficient venting will allow trapped air to accumulate within its mold cavity and potentially result in defects such as bubbles or shrinkage during injection molding, lack of glue application, white spots or black spots appearing as defects on finished products. Therefore inserts may be added wherever additional ventilation may be required – with any spaces between inserts being utilized as venting space.

4. Convenient injection mold processing
In injection molds, there are some deep bone positions that are difficult to machine with cutting tools. Although EDM can be used for machining, EDM processing speed is slow and processing efficiency is not high. Therefore, inlays are generally chosen to reduce processing difficulty and facilitate exhaust. In addition, there is a deep bone type saving mold, because saving the mold in areas where it is necessary to save is very inconvenient, but opening inserts in these areas makes it much more convenient to disassemble the saving mold.

5. Extend the service life of injection molds
Generally speaking, injection molds require the design of inserts, which are often easily damaged areas in the mold. Once the inserts are damaged, they can be replaced to extend the service life of the injection mold.