| 摘要 |
PURPOSE:To insert resin tablets efficiently into molds by softening nothing but part of the resin tablets supplied to the molds with a heating electrode that takes temperature distribution with a specified inclination. CONSTITUTION:An upper electrode 23 and a lower electrode 24 are provided so that an inclination angle is made between their opposite ends. A plurality of resin tablets 25 to be preheated are preheated by a preheater 20 constructed in this manner. At a specified temperature gradient the resin tablets 25 can be preheated by the upper and the lower electrode 23, 24 that are made uneven in the opposite distance. As a result, in the preheating bodies 25, the lower portion in the pot of the mold is softened and the portion that comes in contact with an upper extruding plunger can be hardened. In this manner, air is not engulfed in the preheating bodies 25 of resin tablets in the mold and voids are prevented from occurring. |
