A compression collar is manufactured for reinforcing an interference fit between an end of a pipe and a fitting. A precursor form is injection molded using a cold-expansion material. The precursor form has a tubular body with an initially closed axial end and a bore initially blind formed in the other axial end. Material is removed from the initially closed axial end to form an opening that connects to the bore thereby forming the compression collar. The opening has an inner periphery with a profile in axial cross section that is different than any profile in axial cross section of an inner periphery of the bore. The collar formed lacks knitlines and includes tabs which help to position the collar on a pipe.

We disclose a component of an injection molding tool that includes a one piece side of a mold built up by additive manufacturing using a polymer, the side of the mold defining part of an injection cavity. The side of the mold further includes an injection port coupled to the injection cavity and a heating fluid manifold separated from the injection cavity by a heat transfer wall. The heat transfer wall is reinforced against pressure in the injection cavity by a backing of engineered supports. Inlet and outlet ports are coupled to the heating fluid manifold, configured to channel a thermally conductive fluid into and out of the heating fluid manifold. Additional additive manufacturing features and material properties are described. Complementary methods of manufacturing also are disclosed.

In an injection process, molten resin is successively injected from a first flow channel and a second flow channel connected with each other in order into a cavity of a metal mold. High-temperature resin existing in the first flow channel is injected in advance into the cavity as a part of a single shot of molten resin to later form a skin layer of a molded article. Other low temperature resin near a flowable limit existing in the second flow channel is subsequently injected into the cavity as another part of the single shot of molten resin to later form a core layer of the molded article. A low temperature resin remaining in the first flow channel when injection is completed is warmed to be a high-temperature resin before the next cycle, thereby allowing successive molding of molded articles.

A molded resin component includes a first surface on which a convex portion is formed, and a second surface opposite to the first surface. The convex portion includes a molding mark formed by a valve pin of a manufacturing apparatus that manufactured the molded resin component. A shape of at least a portion of a leading-end surface of the valve pin is not transferred into the molding mark.

Provided is a stack molding machine including an upper mold having formed therein a first runner and a first gate serving as a path of a resin material, a first intermediate plate provided under and combined with the upper mold, and having formed therein a first molding connected to the first gate to mold at least a portion on a first substrate placed under the first intermediate plate, a dummy plate provided under and spaced a certain distance apart from the first intermediate plate, a second intermediate plate provided under the dummy plate, and having formed therein a second molding connected to a second gate to mold at least a portion under a second substrate placed under the dummy plate, and a lower mold having formed therein a second runner and the second gate serving as a path of the resin material, and combined with the second intermediate plate.

An injection molding apparatus (10) comprising an actuator (940, 941, 942) comprised of a driver (940dr, 941dr, 942dr) receiving electrical energy or power from an electrical drive (940d, 941d, 942d), the electrical drive (940d, 941d, 942d) comprising an interface that receives and controllably distributes electrical energy or power in controllably varied amounts during the course of an injection cycle to the driver (940dr, 941dr, 942dr), the electrical drive (940d, 941d, 942d) being housed within or by an actuator housing (940h, 941h, 942h) or being mounted on or to the housing (940h, 941h, 942h), the housing (940h, 941h, 942h) and the electrical drive (940d, 941d, 942d) being mounted on, to or in close proximity to the heated manifold (40), a cooling device (940mc, 940mc1, 940mc2, 941mc, 942mc) disposed between the heated manifold (40) and the housing (940h, 941h, 942h) adapted to substantially isolate or insulate at least the electrical drive (940d, 941d, 942d) from substantial communication with heat emanating or emitted from the heated manifold (40).

An injection molding apparatus (10) comprising: an actuator (940, 941, 942) comprised of a rotor (940r, 941r, 942r) having a drive axis (Y) and a driver (940dr, 941dr, 942dr) receiving electrical energy or power from an electrical drive (940d, 941d, 942d), the electrical drive (940d, 941d, 942d) comprising an interface that receives and controllably distributes electrical energy or power in controllably varied amounts to the driver (940dr, 941dr, 942dr), the actuator including a housing (940h, 941h, 942h) within, on or to which the electrical drive (940d, 941d, 942d) is mounted, the housing (940h, 941h, 942h) being mounted in proximity or disposition relative to the heated manifold (40) such that one or the other or both of the housing (940h, 941h, 942h) and the electrical drive (940d, 941d, 942d) are in substantial heat communication or contact with the heated manifold (40).

A hot runner nozzle includes a nozzle body configured to define a flow path of molten resin, and a cover member arranged at a circumference of a tip portion of the nozzle body. The cover member includes a first engagement portion being arranged on a part of an outer periphery and configured to engage with a mold and/or a second engagement portion being arranged on a part of an inner periphery and configured to engage with the nozzle body.

A hot-runner injection molding apparatus that facilitates use of electric actuators in a compact design includes a hot-runner manifold defining resin channels for conveying resin to nozzles that serve as conduits for introducing liquid resin into a mold cavity, a valve pin configured for linear movement along a longitudinal axis of the nozzle to control flow of liquid resin through the nozzle, and an electric actuator having a body containing an electric motor, wherein the electric actuator body includes channels for circulating a coolant.

The present invention relates to an FPC connector housing, more particular to a DDRS connector housing. The invention also relates to a method for producing the connector housing as well as to a cavity mold suitable for the production of the connector housing. The cavity mold comprises a double gating system with centrally positioned injection gates. The connector housing can be used in a connector for mounting on a flexible printed circuit (FPC) assembled in various kinds of electrical and/or electronic devices.