Two-step injection molding
Method for making an injection-molded product having a partly thin portion Patent #: 4980115
ApplicationNo. 648818 filed on 01/31/1991
US Classes:264/163, Simultaneous severing and shaping, or severing while work remains on shaping surface264/293, Deforming the surface only264/296, One step reshapes portion only of article264/328.7, Including changing mold size or shape during injection or between multiple stages of injection280/728.3Deployment door
ExaminersPrimary: Lorin, Hubert C.
Assistant: Ortiz, A. Y.
Attorney, Agent or Firm
Foreign Patent References
International ClassesB28B 007/14
Foreign Application Priority Data1990-03-06 JP
AbstractA resin material is fed into a cavity of a mold provided with a movable member adapted to form a tear-line on the resin material and capable of moving toward, and away from, the mold cavity such that when the mold cavity is filled with the resin material and the mold is closed, the movable member is advanced toward the mold cavity thereby obtaining a modular cover provided with a tear-line having a small thickness and a high degree of strength.