| 摘要 |
PURPOSE:To mold by a general injection molding process by a method wherein normal injection molder is used for molding a door integrally with a packing under the condition that the thickness of an elastic sealing material and the dimension of a cavity in the molder are controlled. CONSTITUTION:A mold for resin is split in two mold halves. When one mold half 3, in which elastic sealing material 2 is inserted, and the other mold half 4 are closed together, the elastic sealing material 2 is held in a cavity under the condition being compressed to a thickness, which is about 80 - 40% of the initial thickness. After that, when molten resin for the main body 1 is injected from the gate 5 of the mold half 4 under the pressure of 1,000 - 2,000kg/cm<2>, the elastic sealing material 2 is compressed to the dimension A. As a result, a space for the main body 1 and a space for the elastic sealing material 2 under the condition being compressed at injection must be provided in advance in the cavity of the mold. The degree of compaction of the elastic sealing material under free state is 85 - 45% (in other words, the residual thickness is 15 - 55%) of the initial thickness, resulting in allowing to show the function as sealing material. |
