Improved injection molding methods and molds, for forming TPU layers, especially thin TPU covers, into golf ball constructions, and having improved number, shape and placement of both the injection gates and the cold slugs within the mold in order to minimize/eliminate damage to dimples strategically positioned close to the parting line of a mold in order to maximize aerodynamic properties of the resulting golf ball.

The invention relates to an element of a vehicle luminous device, including an element made from a synthetic polymer material and includes an injection space which is formed by a primary space and a secondary space. The element further includes a material injection channel with at least two portions which extend in different directions. A first portion includes an injection location and a second portion is connected to the secondary space, and at least one angled portion with a variable angle connecting the at least two portions and including a protuberance.

An injection molding tool configured for being mounted in an injection molding apparatus for automated molding of work pieces in plastics, said injection molding tool comprising at least one main runner channel extending between the sprue channel and a runner branch where it branches into two or more branched runner channels leading to the mold cavities, and where at least the main runner channel downstream from the sprue channel comprises two flow channels being mutually joined at a runner junction downstream from the sprue channel, and wherein the two flow channels until the runner junction are linear and extending parallel to each other, and being completely or partly separated by a linear separating wall.

A molding die for molding, on a surface of a plate-like base material, an endless-shaped gasket made of an elastic material includes a cavity which is formed on the opposing surface opposed to the surface of the base material and corresponds to the shape of the gasket, a gate for introducing a molding material which is cured to become an elastic material, a first intermediate portion connecting a gate opening and the cavity and a cross section along the base surface has an area equal to or larger than an opening area of the gate opening, a vent discharging gas unnecessary for molding, and a second intermediate portion connecting an opening on the cavity portion side of the vent extending along the base surface and the cavity and a cross section along the base surface has a cross-sectional area equal to or larger than an area of the gate opening.

An injection molded article is obtained by injection molding a molten resin into a mold. The injection molded article includes: a base as a thin plate-shaped member that is connected to a gate of the mold; and a plurality of protrusions each integrally molded on the base and having a thickness greater than a plate thickness of the base. The plurality of protrusions have holes each extending through the base, and the holes in the respective protrusions are connected through another component to form a flow channel. A processed region processed to have a surface roughness greater than a surface roughness of a mirror surface region including a region between the holes on the base is formed in a projected region where a region having a predetermined thickness value is projected on the base.

An injection-molding tool has at least two separate mold parts forming a set of mold cavities, and a set of runner channels extending between the mold inlet and leading melt flow to the mold cavities. The set of runner channels comprises a number of junctions, each junction dividing a downstream end of a primary runner channel extending upstream from the junction into two or more separate secondary runner channels extending downstream from the junction. A stretch of the downstream end of the primary runner has a cross section area being smaller than the cross section area of the primary runner further upstream from the junction.

An injection molding nozzle system for delivering molten material from a manifold to a nozzle is disclosed. The manifold and nozzle are disposed within pocket of a manifold plate. The nozzle is secured to a melt-transfer bushing disposed within the manifold via a collar. The collar is secured to the bushing such that it is centered about the axis of the outlet of the bushing. A support ring supports the nozzle within the pocket such that the nozzle is centered about the axis of the pocket. In a cold state, the outlet of the bushing and the inlet of the nozzle are misaligned. In operation, thermal expansion of the components bring the outlet of the bushing and the nozzle into alignment. The melt-transfer bushing and the connection of the nozzle to the manifold, via the releasable connection between the collar and the bushing facilitates manufacture and assembly of the system.

An interdental cleaning tool producing method that enables cost reduction is provided. An interdental cleaning tool producing method according to the present invention includes; a first step of preparing a mold provided with at least one first cavity for molding a cleaning tool main body including two supporting pieces that are arranged with a predetermined interval and a handle portion that couples the two supporting pieces and can be held in a hand, the mold being configured such that at least one thread member to span between the two supporting pieces can be arranged in the mold; a second step of arranging the thread member in the mold; a third step of filling the first cavity with a resin material via a gate provided in the mold using a hot runner method; and a fourth step of removing the thread member and the cleaning tool main body fixed to the thread member from the mold.

An interdental cleaning tool producing method that enables cost reduction is provided. An interdental cleaning tool producing method according to the present invention includes; a first step of preparing a mold provided with at least one first cavity for molding a cleaning tool main body including two supporting pieces that are arranged with a predetermined interval and a handle portion that couples the two supporting pieces and can be held in a hand, the mold being configured such that at least one thread member to span between the two supporting pieces can be arranged in the mold; a second step of arranging the thread member in the mold; a third step of filling the first cavity with a resin material via a gate provided in the mold using a hot runner method; and a fourth step of removing the thread member and the cleaning tool main body fixed to the thread member from the mold.

Provided is a cleaning agent composition that is capable of efficiently performing the substitution of a molding raw material in a hot runner type mold. The cleaning agent composition contains 100 parts by weight of a thermoplastic resin; 1 part by weight to 20 parts by weight of at least one type of fatty acid ester that is selected from glycerin fatty acid ester, polyglycerin fatty acid ester, or sorbitan fatty acid ester; and 1 part by weight to 15 parts by weight of a metal salt of a fatty acid and/or a hydroxyfatty acid. The cleaning agent composition is used for cleaning a flow channel for resin in a hot runner type mold.