| 摘要 |
PURPOSE:To obtain an article with acceptable appearance, by a method wherein a gate-side end of an insert made of a rigid-elastic synthetic resin is clamped by an undercut at a weir part provided in a mold, when injection molding an article by holding the insert in the mold so that the insert is provided at the back side of the article. CONSTITUTION:The insert 1 is set in a male mold 3. In this case, since the insert 1 is made of a rigid-elastic synthetic resin, the gate-side end of the insert 1 is engaged with an undercut surface 8A of the weir part 7 by spring elasticity. Then, the mold is closed and a soft coating material is injected from an injector, and the material is fed into a cavity 6 through a sprue, a runner 9 and a gate 5. In this case, the material flows initially on the upper side of the insert 1 under the function of the weir part 7, so that the insert 1 is securely prevented from floating. Accordingly, the article can be molded with acceptable appearance. |
