| 摘要 |
Apparatus for molding elastomeric stock, comprising an apertured, heat-resistant, flexible, insulation plate arranged between a heated mold and the discharge portion of an elastomeric stock injection unit such that a mold cavity is aligned with an array of apertures in the insulation plate which intercommunicate the mold cavity with an internal discharge chamber in the injection unit. A mold cavity cover is carried by the insulation plate and confronts the mold cavity, the cover and upper portion of the cavity when juxtaposed defining a constriction therebetween. When the mold and injection unit are moved relative to one another such that each presses against the other through the intermediary of the insulation plate, there is effected expulsion and transferring of a portion of elastomeric stock from the injection unit into the mold cavity to be cured, an excess portion of elastomeric stock remaining in the injection unit being prevented from undergoing curing by means of the presence of the insulation plate. The constriction between the cover and the upper portion of the cavity generates a score line in the cured transferred portion of stock along which scrap cured in the cavity may be separated from the cured product. |
