Golf ball methods and molds for quickly and efficiently eliminating air/gas from within a mold while better centering a subassembly in the mold during golf ball manufacture and the improved golf balls resulting therefrom.

The present invention is directed to a mold for forming the cover of a golf ball having a non-planar parting line on its spherical surface.

Disclosed are injection molds, injected molded articles, and methods for using the same. The injected molds include a mold cavity and an injection molding conduit having a first end, a second end defining an outlet in fluid communication with the mold cavity, a first interior transverse dimension that is perpendicular to a longitudinal axis of the injection molding conduit, a second interior transverse dimension that is perpendicular to the longitudinal axis and to the first interior transverse dimension, and at the second end, the second interior transverse dimension is at least three times larger than the first interior transverse dimension, and the second interior transverse dimension of the injection molding conduit is substantially aligned with a thickness of a portion of the mold cavity that is adjacent to the outlet of the injection molding conduit.

An interior part for a vehicle is formed by core-back expansion molding. The interior part includes a foamed plastic body formed by injecting a foamable plastic resin into a mold and separating the mold portions of the mold to allow foaming expansion of the foamable plastic resin. An edge portion of the foamed plastic body includes a projecting freeze section and a core-back expansion radius located adjacent to the projecting freeze section. The projecting freeze section is formed in a freeze seal area of the mold adjacent a parting line to help prevent excessive flashing of material at the parting line during separation.

A protective cover includes: a synthetic resin disc part having formed therein a separation wall which is thinner than other parts of the disc part and separates a magnetic encoder and a magnetic sensor from each other; and a synthetic resin sensor holder part protruding inward from the disc part. A gate mark caused by the injection molding is present n an outer peripheral surface of the disc part or an outer peripheral surface of a cylindrical part continuous with the disc part, in the radially outer side of the separation wall. Since the gate is at the radially outer side, of the separation wall, which is near the separation wall, no charging end weld is generated on the separation wall when a molten synthetic resin material is injected from the gate into the cavity of the injection mold die and solidified in an injection molding step.

An interior part for a vehicle is formed by core-back expansion molding. The interior part includes a foamed plastic body formed by injecting a foamable plastic resin into a mold and separating the mold portions of the mold to allow foaming expansion of the foamable plastic resin. An edge portion of the foamed plastic body includes a projecting freeze section and a core-back expansion radius located adjacent to the projecting freeze section. The projecting freeze section is formed in a freeze seal area of the mold adjacent a parting line to help prevent excessive flashing of material at the parting line during separation.

A spacer (1) is injection molded by using an injection molding die having resin flow channels that are designed such that a plurality of gates (6) are arranged along the longitudinal direction at a position corresponding to the outer peripheral surface of a side wall part (4) in which a plurality of arc-like peripheral surface parts (2) are connected through a waist part (3). After opening the mold and ejecting the spacer, the spacer is cooled with a runner (7) being connected to the gate (6), and thereafter, the runner (7) is cut off. As a result, when producing a water jacket spacer that is assembled to the inside of the water jacket and controls the flow of cooling water by injection molding, while producing with a high productivity without being affected by design constraints caused by draft angle, deformation in the post-molding cooling step is prevented.

An injection-molded impeller includes a center shaft portion and a plurality of vanes. The plurality of vanes are formed at a peripheral area of the center shaft portion at regular intervals. The injection-molded impeller is rotated around an axial center CL of the center shaft portion to flow out a fluid flowed in between the adjacent vanes from a direction along the axial center CL of the center shaft portion toward a radially outer side. The vanes include non-deflecting shape portions and arc-shaped flow deflecting portions. The non-deflecting shape portions linearly extend from the center shaft portion along a radial direction. The flow deflecting portions extend from the non-deflecting shape portions to radially outward ends. The vanes are formed in a spiral pattern from one end side to another end side along the axial center CL of the center shaft portion.

A roller is capable of smoothly rotating without any burr on a rolling surface. A dish washer including the roller includes: a case; a basket configured to accommodate dishes; a rail configured to guide the basket to be put into or taken out of the case; and a basket roller coupled with the basket and configured to move along the rail, the basket roller comprising a rolling portion configured to roll in contact with the rail, a first flare portion extending in a first direction from the rolling portion, and a second flare portion extending in a second direction from the rolling portion, the second direction being opposite to the first direction, wherein a diameter of the first flare portion is greater than a diameter of the second flare portion.

A spacer (1) is injection molded by using an injection molding die having resin flow channels that are designed such that a plurality of gates (6) are arranged along the longitudinal direction at a position corresponding to the outer peripheral surface of a side wall part (4) in which a plurality of arc-like peripheral surface parts (2) are connected through a waist part (3). After opening the mold and ejecting the spacer, the spacer is cooled with a runner (7) being connected to the gate (6), and thereafter, the runner (7) is cut off. As a result, when producing a water jacket spacer that is assembled to the inside of the water jacket and controls the flow of cooling water by injection molding, while producing with a high productivity without being affected by design constraints caused by draft angle, deformation in the post-molding cooling step is prevented.