Patent ID: 6077067
Filing Date: 2000-06-20
Classification: B29C,B29K

Abstract:
In an injection molding apparatus having an elongated cavity (66) in a mold (16) and a cooled mold core (10) made of a hollow elongated body (80) and a front cap (76) having an inner surface (130) and an outer surface (128), the elongated body (80) having an open front end (78), an outer surface (128) and a longitudinally extending central duct (104) to convey cooling fluid therethrough, whereby the outer surface (128) of the body (80) and the outer surface (128) of the front cap (76) form an inner side of the cavity (66), the improvement wherein;the front cap (76) is dome shaped and the elongated body (80) has a plurality of cooling fluid bores (118) extending longitudinally around the central duct (104), the elongated body (80) and the front cap (76) are integrally joined together whereby the front cap (76) encloses the open front end (78) of the elongated body (80) to form a cooling fluid conveying space (126) extending between the central duct (104) and the cooling fluid bores (118), and the inner surface (130) of the front cap (76) has a plurality of curved ribs (132) extending into said cooling fluid conveying space (126) to form a plurality of curved grooves (134) therebetween, each of the curved grooves (134) being aligned with one of the cooling fluid bores (118) in the elongated body (80).