Injection molding device

In a device for injecting a thermoset casting resin in a mold at ambient temperature, the device including a source of the resin, a mold for receiving and curing the resin, a delivery vessel for injecting the resin into the mold, and a conduit in fluid communication between the mold and the delivery vessel, wherein the improvement comprises said delivery vessel defined by a piston, said piston comprising an outer body and a movable ram operatively disposed for reciprocal movement within said outer body, said outer body being formed from a plastic material and comprising a body distal end having an aperture formed therethrough in fluid-communicating relation to the conduit;

• said ram having a ram distal end in opposed relation to said body distal end, said ram distal end defining a ram cone having its vertex in opposed relation to said body distal end and a surface of said ram cone being rubber, and said body distal end comprising a body cone having its vertex disposed in opposing relation to said ram cone vertex, said aperture extending through said vertex of said body cone, the height of said ram cone vertex and of said body cone vertex being substantially equal, whereby static electricity is generated as said ram cone advances toward said body distal end and the resin is delivered to the mold such that gas bubbles existing within the resin will be attracted to the plastic material forming the outer body, away from said aperture.