| 摘要 |
PURPOSE:To cause the injection molding for the cup having a handle, etc. without the cracks or the breakages of the cup by a method in which the handle is inserted into the recessed groove provided on the core surface of a pair of side cores opened mutually, and then resin material is packed under pressure into a cavity from the ring gate provided on the periphery of the cavity, whereby the injection molding is achieved at the condition where the tip part of the handle is buried in the resin material. CONSTITUTION:The handle 20 having been preformed is inserted into the recessed groove 15 provided on the core surface of side cores 13. The template 10 on a movable side is raised, and the angular pins 17 of the template 8 on a stationary side are simultaneously inserted into the hole 14 of the side cores 13, whereby the side core 13 is moved to a core 6 and is caused to be in contact with the lower surface of the template 8 on the stationary side and then is closed. Then, resin material is poured and packed into the formed cavity 11 through a sprue 18 and by way of a ring gate 16. After the resin has been solidified or cured, the cores 13 are opened and the template 10 on the movable side is lowered and then the molded product is taken out. Thus, the handle 20 having been preformed is recieved in the side cores 13 and moreover the resin is poured from the whole periphery of the cavity 11, whereby the occurrence of the cracks or breakages in the product may be prevented. |
