principle

Basic principle:

The double injection molding is mainly based on the two injection molding machine with two feed tubes and sets of molds in order to form a double shot product by two times.

Work steps: 1.A raw material through the A tube into the 1 molding injection molding into a single shot A.

After the 2 cycle mold, A products left in the male die forming motor rotation to the mold. B template

3.B prepared by the B tube into 2 double shot molded products, mold ejector.

Design points

1. Before the design review

1 mold material

2 molding products

3 molding machine selection

4 module base structure

Two. Mold design important projects

1 Multi Color Injection combination mode

2 runner system

(1) lower injection pressure

(2) rapid filling to complete, can enhance production

(3) can be evenly shot, the product quality is better

(4) reduce the waste and shorten the injection time.

3 forming equipment:

(1) the injection volume of each injection cylinder, it is decided that the same material with the cylinder.

(2) the location of the strike and stroke.

(3) the configuration of the water circuit, oil circuit and circuit on the rotary disk.

(4) the carrying capacity of the rotating disk.

4 module design: mold core configuration design

First of all, taking into account the need to rotate 180 degrees to the side of the mold, the mold kernel must be cross symmetric, otherwise it can not be formed.

(1) the guide post: with the guidance of the common mode and the function of the master mode.

(2) return pin: as a result of the mold must rotate the movement, therefore must be fixed on the top plate, in the return pin to add the spring to make the top of the board to maintain stability.

(3) positioning block: to ensure that the two module is fixed to the large fixed plate is not due to the gap between the screws and the resulting offset.

(4) adjustment block (Nai Mokuai): the mold is mainly used in die height Z coordinate values when the error can be adjusted.

(5) ejection mechanism: the design of the top out mode is the same as the general mold.

(6) the design of the cooling circuit: the design of the cooling circuit of the mold and the mold two is the same as the one.