A method for producing a part consisting of a polymer material involves injection-moulding said polymer material in a mould comprising a main section for forming the part and an additional section for forming an add-on for the part. The additional section is arranged between the injection point and the main section. The part and the add-on are separated by cutting.

A system or method of forming an oral care implement and an oral care implement formed thereby comprising a base structure having a handle portion and a head portion. The method may comprise providing a first mold that defines a first mold cavity having a first portion that corresponds to the handle portion and a second portion that corresponds to the head portion; injecting a first material into the first portion of the first mold cavity via a first injection orifice with a first hot runner sub-system; and injecting a second material into the first portion of the first mold cavity via a second injection orifice with a second hot runner sub-system, the second material being injected into the first material thereby forming the base structure, the second material forming a core component and the first material forming a shell component of the base structure that surrounds the core component.

A cavity plate assembly (400) for a preform mold (100), which includes a cavity plate (410) having an array of seats (412) and a corresponding array of cavity inserts (440) mounted to a front face (CVF) of the cavity plate (410) and in communication with a respective seat (412). Each cavity insert (440) includes a body (441) with a mounting face (441a) and a spigot (443) projecting from the mounting face (441a) and received in a respective seat (412) of the cavity plate (410) such that the mounting (441a) face abuts the front face (CVF) of the cavity plate (410). Each cavity insert (440) also includes a molding surface (448) along its length, at least two thirds of which extends beyond the cavity plate (410).

An injection molding machine includes an edge gate nozzle with a nozzle body having a primary melt channel and a nozzle head having first and second secondary melt channels that feed melt to first and second nozzle tips. First and second heaters are disposed in the nozzle head to provide heat to the secondary melt channels. In some embodiments, the heaters are positioned adjacent to the secondary melt channels, with first heater is closer to the first secondary melt channel than to the second secondary melt channel. In some embodiments, the heaters are positioned adjacent to the nozzle tips, with the first heater closer to the first nozzle tip than to the second nozzle tip. In some embodiments, each heater is adjacent to both the respective nozzle tip and secondary melt channel. In some embodiments, each heater is individually controllable.

A molding method for a synthetic resin molding that includes a molding body, a bent portion, and a flange. The bent portion and the flange are continuous in a longitudinal direction of the side edge. The flange includes a wide portion and a narrow portion. The molding method for the synthetic resin molding includes arranging a gate at a position corresponding to an end of one side of the flange in a longitudinal direction, performing injection molding using a colored resin material containing a luster agent kneaded in the material, and forming a protrusion along the side edge in the longitudinal direction at a back of a boundary portion between the flange and the molding body to reduce interference of flow of the molten resin from the flange toward the molding body during the injection molding.

The present invention is directed to a golf ball having a non-planar parting line on its spherical surface.

The reliability of a semiconductor device is improved. During resin injection in a molding step, in a plan view, a plurality of gates of a molding die are arranged at positions different from those over extended lines of a plurality of dicing regions and a resin is injected from the gates. In this way, it becomes possible to reduce entrainment of air in the dicing regions and to lower an occurrence rate of voids. As a consequence, it becomes possible to suppress an occurrence of poor appearance such as formation of voids in a sealing body and to suppress formation of a starting point of a crack which may occur during a reflow process. Thus, the reliability of the semiconductor device can be improved.

The present invention refers to an injection molding nozzle for introducing a molten plastic to a mold cavity (15) of an injection molding tool via a slot gate (2, 2, 3). The injection molding nozzle includes a nozzle core (2, 3, 3) having an elongate edge (3B) and is received in an opening (1A, 1) in a housing (1, 1). A portion of the nozzle core (2, 3, 3) is spaced apart from the housing (1, 1) so as to define a nozzle flow channel that is in fluid communication between a source of the molten plastic and the slot gate (2, 2, 3), and at least a downstream portion of the nozzle flow channel that is between the housing (1, 1) and the nozzle core (2, 3, 3) surrounds the nozzle core (2, 3, 3) on all sides.

A molded body according to one aspect of the present disclosure is a molded body obtained by molding resin and used by allowing light to pass through the resin. In this molded body, a gate mark as a mark of a gate through which resin was injected during molding is disposed to a bonding surface to be bonded to an other member having no light transmittance, that is, to a bonding surface in the molded body.

Plural ejector pins are made to project before a molten resin containing reinforcing fibers is injected into an inside of a cavity through pin point gates in a web forming portion in the inside of the cavity and at positions outside the pin point gates in a radial direction. The ejector pins are retracted from the inside of the cavity after a flow of the molten resin containing reinforcing fibers injected into the inside of the cavity through the pin point gates impinges on the ejector pins and is divided and before a tooth portion forming portion in the inside of the cavity is filled with the molten resin containing reinforcing fibers. Accordingly, weld lines which extend along the radial direction are formed at positions outside the ejector pins in the radial direction, and the molten resin is filled in portions formed after the ejector pins are retracted.