Three structures of two-color injection molds
The seesaw structure consists of two sides revolving around a central axis, with one side moving upwards and the other side moving downwards, repeating this process. The seesaw structure is mainly used in the design of keyboard molds with numbers and letters. Containing enclosed numbers or letters such as 0, 4, 6, 8, A, B, D, O, etc., only by using a seesaw structure can secondary materials flow smoothly into the enclosed area, forming a beautiful appearance. The working principle of the seesaw structure is: after one injection molding, the mold is opened, and the seesaw rotates around the rotation axis under the action of the push rod with the breaking needle, causing the breaking out plate to push upwards under the push of the seesaw. In this way, the breaking needle moves upwards to break out a hole at the boundary of the enclosed area of the product. When the second injection molding is carried out, the broken pin is used to move downwards and create a circular hole, allowing the secondary material to enter the enclosed area through the broken hole.