Come in and learn all about plastic molds! (High-scoring questions on mold design for foreign investment recruitment)

I only know a little bit:

1. There are three ways to eject products: mechanical, hydraulic and pneumatic. Among them, mechanical ejection is the most commonly used.

2. Secondary ejection means: if the product is still in the cavity after one ejection, or cannot fall off automatically, another ejection action is required.

3. Front mold insert (Dongru head)---I don’t know about this.

4. Precision molds refer to molds that require very high precision, and the positive and negative tolerances of dimensions are very small, some even only a few tenths of a millimeter, which are difficult to process with ordinary machine tools.

5. The biggest difference between exported molds and domestic molds is the precision requirements.