Two-Color Mold Design And Injection Molding

- Aug 08, 2018-

12. The code mode of the exit die should be on the operating side and the non-operating side, not on the heaven and earth side, because their products should be fully automatic.


13. Note on the parting surface: the parting surface of the rear mold parting surface should be the back part after the combination of the two products; the front part parting surface should be taken from a single product, and the combined product is not available. Parting surface.


14. The tolerance of the front and rear flanges is minus 0.05mm, the tolerance of the two flanges is plus or minus 0.02mm, the gap between the top and the top stick holes is 0.1mm, and the center tolerance of the guide bushes of the front and rear die guide sleeves is positive or negative. 0.01, the tolerance of the four sides and the depth of the mold frame. Otherwise, when the rear mold rotates 180 degrees, the front end is generated due to the inconsistency of the height. The frame depth tolerance is minus 0.02 mm.


15. If the mold base has been processed in the mold factory, the factory should process the nozzle and the top stick hole, and take the number of the center of the guide hole of the four guide pillars as the reference. Otherwise, the deviation is too much, and the card is easy to be used. Die die. When ordering the mold embryo, it should be marked as a two-color mold base. The four guide pillar guide sleeves and the frame are symmetrical, and the rear mold can be matched with the front mold after being rotated by 180 degrees.


16. If it is the two-color rotation of the rear mold, it is much simpler. The two front cores are the same. After the hard rubber is injected, rotate 180 degrees (note that the product can not be dropped when the product is turned, the gate can be automatically separated). After the other side, the soft rubber is injected. The hard rubber does not need to be placed on the thimble. It only needs to be placed on the soft rubber core. In addition, the shrinkage should be noted. If the soft rubber is completely entangled with hard rubber, only the hard rubber should be placed. Shrinkage, if the contours are connected, the hard rubber soft glue should be shrunk.


17. If it is a two-color mold of a mold, it is a straight barrel, a 90-degree barrel shot, no need to rotate, only a core, soft and hard glue separation method by row seal glue.


18.Cavity's two shapes are different, forming one product separately. The two shapes of the Core are the same.


19. After the front and back molds of the mold are rotated 180° from the center, it is necessary to match. This check must be done during design.


20. Pay attention to the position of the thimble hole with a minimum interval of 210 mm. Large molds must properly increase the number of jack holes. Moreover, since the thimble attached to the injection molding machine itself is not long enough, it is necessary to design a long ejector pin in our mold, and the thimble grows about 150 mm from the bottom of the mold base.


21. Two positioning rings must be designed on the bottom plate of the back mold.


22. The total thickness of the front mold panel plus the A board shall not be less than 170 mm. Please carefully review other reference data for this type of injection molding machine, for example, maximum die thickness, minimum die thickness, and top bar hole spacing.