Two-Color Mold Design And Injection Molding

- Aug 08, 2018-

1. The basic principles of two-color model design:


(1) Hard rubber is done once, and soft rubber is done twice.

(2) 1 time for transparency and 2 times for non-transparency.

(3) The plastic with high molding temperature is made once, and the molding temperature is low twice.


The above is the basic principle of making a two-color mold, otherwise the mold will be white; in addition, when sealing, try to use the sealant instead of inserting the sealant.


2. The guide bush guide bushing must be symmetrical about the top, bottom, left and right, and the front and rear modes are symmetrical.


3. The rear mold should be rotated 180 degrees, and the front mold does not move.


4. The product spacing must be based on the spacing of the injection molding machine gun nozzle. The nozzle spacing of two foreign-colored two-color injection molding machines is adjustable, some are not adjustable, and the domestic is not adjustable.


5. Two separate ejector systems, the top stick is also two. The two products of the rear die are the same, the thimbles are the same, and they are in a rotating relationship.


6. The ejector plate can only be reset by spring. It is not possible to force the reset by the screw because the rear die should be rotated.


7. The side lock must be on the four sides of the center of the mold, and the front and rear molds are symmetrical. Otherwise, when the rear mold is rotated 180, it will not be aligned with the front mold.


8. If the distance between the glue points and the distance between the nozzles of the injection molding machine are different, the top stick holes should be made into a waist type because the spacing of the top pins of the injection molding machine is not adjustable. Note that most of the injection molding nozzles of domestic two-color injection molding machines are not adjustable.


9. Pay attention to the direction of the parallel nozzle of the injection molding machine provided by the customer. It is the X-axis or the Y-axis to determine the layout of the product.


10. The direction of water in and out of the water must be on the side of the heaven and earth, and the inflow and out of each circulating water must be on the same surface. The water should not be in the sky, and the water should be on the ground side. Because the back mold should be rotated 180 degrees, pay attention to the mold. The size should not exceed the height of the water tank of the injection molding machine, otherwise the water cannot be transported.


11. The first injection of the product should be placed on the non-operating side, because the first injection of the product should be rotated 180 degrees for the second injection, just to the operating side, easy to take the product.