1.Middle plate mold structure
In general, the two moving parts of the two-color injection mold are exactly the same. However, due to the product's two-color injection mold process structure needs, it requires that the two moving mode is different, also does not need to use the side core pulling mechanism, then needs to use the plate mold structure to solve. Working principle of the middle plate mold: in the process of injection molding, two sets of moving molds do not rotate. After the injection molding machine completes one injection, the fixed moving mold is opened. First, the middle plate is pushed out, and then the middle plate is rotated 180°.In this way, the inserts of the first and second parts of the plate can be made into different shapes to achieve the desired design purpose.
2."The Twin" structure
"The Twin" structure two-color injection mold generally has two sets of mold, also need two sets of the mold frame. Sometimes two similar products (symmetrical or matching upper and lower covers, with similar dimensions) are formed at a time and two parts are made on a set of die frames. This is where "the twin" structure is used. For "the twin" mold, because in the same set of mold design two different positions of the nozzle position, this needs to be determined according to the choice of injection molding machine fixed die fixed plate cylinder position."The Twin" structure working principle: the mold is designed to have only one set of die frame, according to the position of the injection molding machine barrel to determine the two glue points, the die frame is divided into two parts, one part of the forming, one part of the forming. It is also the same two moving molds and two different fixed molds. Such molds are injected once and twice at the same time. The ejection is also the part that only ejects the product twice. Every time a similar product is produced.
3.Seesaw structure
A seesaw is a structure in which the two sides rotate around a central axis, one side moving up, the other side moving down, and so on. The seesaw structure is mainly used in the design of keyboard molds with Numbers and letters. With closed Numbers or letters, such as 0, 4, 6, 8, A, B, D, O, only the seesaw structure can allow the secondary material to flow into the closed area smoothly, forming A beautiful appearance. The working principle of the seesaw structure is as follows: after injection molding, the mold is opened and the seesaw rotates around the rotation axis by the broken needle under the action of the push rod, and the seesaw is pushed upward by the broken ejector plate. In this way, the broken needle moves upward to make a broken hole at the boundary of the closed area of the product. Then when the second injection molding, in the role of the broken plate return pin by the broken needle to move down, so that the second material can rely on the broken hole drilling closed area.
