Patent ID: 7094376
Filing Date: 2006-08-22
Classification: B29C

Abstract:
1. A method molding a molded article comprising: a) introducing molten material into a mold cavity; b) receiving a predetermined amount of molten material into a passage adjacent said mold cavity; c) displacing said predetermined amount of material from said passage and into said mold cavity during solidification of said molten material; d) providing for travel of a movable member within said passage substantially equal to twice a determined amount of height loss caused by material shrinkage; and e) determining an amount of said molten material received within said passage according to a relationship between material shrinkage and mold injection pressures comprising determining a biasing force for biasing movement of said movable member against injection pressures such that movement of said movable member within said passage is substantially equal to twice the amount of height loss caused by material shrinkage.