This injection-molded article is an injection-molded article using a cellulosic fiber composite resin, including: a resin insert piece including a colorant or a cellulose fiber; a first region formed of the cellulosic fiber composite resin; and a second region formed along a weld line of the cellulosic fiber composite resin extending from the resin insert piece, in which the first region and the second region have different color tones.

A mold, a method for producing a plate-shaped molded article, and a method for producing a test piece capable of easily producing a test piece in which an orientation direction of a filler is highly aligned are provided. A method for predicting a characteristic of a resin composition molded article is also provided, the method being able to measure an anisotropy characteristic value of a resin composition by using the test piece and to improve prediction accuracy by using the characteristic value in a computer analysis. Further in detail, a mold for injection molding the plate-shaped molded article by using a molten material of a thermoplastic resin includes a runner section that has a slit gate section provided along a width direction of the plate-shaped molded article and is configured to fill a cavity with the molten material, which is injected via a sprue section, via the slit gate section.

A first concave-convex part is formed in an outer diameter side circumferential surface of a first annular concave part provided in an axial one-side surface of an inner wheel element, and a second concave-convex part is formed in a bottom surface of a second annular concave part provided in the axial other-side surface of the inner wheel element. An outer circumferential part of the inner wheel element is embedded in an outer wheel element, and synthetic resin forming the outer wheel element partially enters into a plurality of concave parts constituting the first concave-convex part and the second concave-convex part. Thus, a configuration is achieved in which the holding power of a synthetic resin outer wheel can be secured from the metal inner wheel element, and the manufacturing error can be suppressed in the worm wheel tooth part provided in the outer circumferential surface of the outer wheel.

A first concave-convex part is formed in an outer diameter side circumferential surface of a first annular concave part provided in an axial one-side surface of an inner wheel element, and a second concave-convex part is formed in a bottom surface of a second annular concave part provided in the axial other-side surface of the inner wheel element. An outer circumferential part of the inner wheel element is embedded in an outer wheel element, and synthetic resin forming the outer wheel element partially enters into a plurality of concave parts constituting the first concave-convex part and the second concave-convex part. Thus, a configuration is achieved in which the holding power of a synthetic resin outer wheel can be secured from the metal inner wheel element, and the manufacturing error can be suppressed in the worm wheel tooth part provided in the outer circumferential surface of the outer wheel.

A system and method to dispense, mix, and inject liquids and force them into a vented investment pattern mold cavity comprises a source of raw materials in fluid communication with an injection unit for metering and delivering the raw materials. A mixing and injection head receives and mixes the metered raw materials. A movable molding cart upon which an investment pattern mold is mounted is disposed adjacent the injection unit and proximate the mixing and injection head. The movable molding cart includes a fill cup that may be engaged by the mixing and injection head. A displaceable gating tray provides fluid communication with the fill cup and a sprue aligned with an investment port on a lower portion of the investment pattern mold. The system also includes a digital computer control by which the injection process may be controlled.

A control valve includes a housing, a valve body arranged in a valve chamber of the housing, and a support member fixed to the housing and supporting the valve body in the valve chamber. The valve body has a tubular shape into which the support member is inserted, and the valve body is slidable on the support member between a first position to close an inlet passage and a second position to close a drain passage. The valve body includes a skin layer forming an outer surface of the valve body, and a core layer under the skin layer. The outer surface of the valve body includes a core exposed portion where the core layer is exposed without being covered with the skin layer.

A method may be employed to produce a variable-length steering shaft. The method may involve positioning a shaft core within a mold cavity of an injection molding tool coaxially with respect to a mold surface that delimits a toothing region, injecting molten plastic into the mold cavity between the shaft core and the mold surface of the mold cavity, removing a toothed shaft from the injection molding tool after the molten plastic has solidified, providing a hollow shaft and axially inserting the toothing region into an internal toothing of the hollow shaft. To make it possible to provide an improved sliding coating with the least possible manufacturing outlay, the injection of the molten plastic may be performed from one axial end region of the mold cavity.

A control valve includes a housing, a valve body arranged in a valve chamber of the housing, and a support portion slidably supporting an outer surface of the valve body in the valve chamber. The valve body is slidable on the support portion between an open position at which an outlet port is open and a closed position at which a seat surface of the valve body closes the outlet port. The valve body includes a skin layer forming the outer surface of the valve body, and a core layer under the skin layer. The outer surface of the valve body, other than the seat surface and a slidable area, includes a core exposed portion where the core layer is exposed without being covered with the skin layer.

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.

A system and process for injection molding polymer articles is described. The system and process are designed to reduce gate blush. In one embodiment, an injection molding device injects a molten polymer composition into a mold cavity adjacent to an interior curved surface on the mold. The flow of the polymer material is parallel to a line that is tangent to the curved surface.