Patent ID: 7438552

Claim:
A molding apparatus for making an elongated hollow, tubular plunger part having a tip portion and an axially directed flexible wiper lip extending forwardly and outwardly to overlap a portion of the tip at a predetermined angle comprising an elongated one-piece rear mold having a generally cylindrical bore extending axially the length of the mold, an elongated cylindrical core slidably mounted in said bore, said bore tapering downwardly and outwardly at one end, a front mold having a circumferentially extending axially projecting front wall at one end engageable in the rear mold and spaced therefrom to form said axially directed flexible wiper lip spaced from the tip portion and extending forwardly and outwardly therefrom so that when the core is activated axially to withdraw the plunger part, the lip is compressed radially inwardly to a point where it freely slides in the mold bore to permit the finished plunger part to be withdrawn axially.