An improved heater band for a hot runner injection molding machine. The heater band includes a cylindrical sleeve adapted to be disposed about a nozzle body in combination with a first wire heating element and a second wire heating element. The first wire heating element includes two contact terminals and an intermediate portion therebetween. The intermediate portion of the first wire heating element is disposed within the cylindrical sleeve. The second wire heating element includes two contact terminals and an intermediate portion therebetween. The intermediate portion of the second wire heating element is also disposed within the cylindrical sleeve. The intermediate portions of the heating elements are adjacent to and axially offset from one another within the cylindrical sleeve. The first wire heating element and the second wire heating element can be alternatively connected to an electrical power supply to extend the operational life of the heater band.

An apparatus for injection molding of plastic materials includes a mold having at least one plate, a hot runner distributor of the fluid plastic material, at least one injector and an actuator for controlling the opening and the closing of the injector, supported by the distributor and whose cooling is carried out by thermal exchange contact with the plate. Provided for the cooling of the jack actuator is at least one body made of thermally conductive material at least partly surrounding the actuator in an axially slidable manner and it is maintained in thermal exchange contact with the plate by a magnetic force and/or a fluid thrust and/or an electrical drive force.

The present disclosure provides an injection molding apparatus, including a fixed mold component, a movable mold component, a first positive electrode module, and a first negative electrode module. The fixed mold component has an injection port and a transmission runner, to receive injection-molding melt. The movable mold component has a molding groove communicated with the transmission runner. The first positive electrode module and the first negative electrode module are disposed on a first side and a second side of the molding groove respectively, where the first side and the second side are opposite to each other. The first positive electrode module cooperates with the first negative electrode module to form an electric field between the first side and the second side of the molding groove, to perform electric field excitation on the injection-molding melt flowing into the molding groove.

The invention relates to an injection molding tool having a nozzle plate which comprises a first through-hole in an axial direction, in which first through-hole an injection molding nozzle is arranged extending in the axial direction. The injection molding tool further includes a cavity plate which comprises at least one cavity half into which a second through-hole, which is arranged in the cavity plate and coaxially with respect to the first through-hole, opens. A nozzle bushing, which encloses the injection molding nozzle at least in certain regions in the assembled state, is arranged in the second through-hole. The nozzle bushing is operatively connected to the cavity plate and/or nozzle plate by way of an operative connection means, wherein the nozzle bushing and the operative connection means are operatively connected to one another at least in the axial direction.

An air freshener has a rigidifying core defining a central axis, and an outer portion or sleeve contacting the core that is formed from one or more fragrance loaded polymers. Together, the core and outer portion are shaped to surround a first axis perpendicular to the central axis. The air freshener is made by injection molding a first shot of at least one polymer material to form the core, and injection molding a second shot of at least one polymer material incorporating one or more fragrance materials over or onto or into at least a portion of the core. The second shot of polymer material may be stretched about the portion of the core during injection molding, and may flow into a first hole formed in the core at or near the core distal end, and fills a second hole formed in the core at or near the core proximal end.

To manufacture a sprue-bush which is capable of suitably cooling a melt raw resin in a raw resin-flow path as a whole, there is provided a method for manufacturing a sprue-bush, wherein a shaped part is located on a base part to manufacture the sprue-bush, the base part comprising a raw resin-flow path and a cooling medium-flow path, wherein, in the shaped part, a downstream raw resin-flow path portion is located and a downstream cooling medium-flow path portion is also located, the downstream raw resin-flow path portion corresponding to a downstream side region of a raw resin-flow path of the sprue-bush, the downstream cooling medium-flow path portion being positioned around the downstream raw resin-flow path portion and corresponding to a downstream side region of a cooling medium-flow path of the sprue-bush, and wherein the downstream cooling medium-flow path portion is located to surround the downstream raw resin-flow path portion.

In order to provide a sprue-bush which is capable of suitably cooling a melt raw resin in a raw resin-flow path as a whole, there is provided a sprue-bush, comprising a raw resin-flow path and a cooling medium-flow path located around the raw resin-flow path, wherein a width dimension of the raw-resin flow path gradually becomes larger toward a downstream side-end surface of the sprue-bush, and wherein the downstream side-end surface of the sprue-bush is a heat transfer surface.

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 method of forming a layered heater assembly includes: forming a plurality of layers onto a substrate, the plurality of layers including a resistive element layer; forming electrical terminations in contact with the resistive element layer; securing a protective cover over the layers using a laser welding process, wherein edges of the protective cover are welded circumferentially around raised end portions of the substrate and welded longitudinally along a slotted portion of the substrate; securing a pair of lead wires to the electrical terminations; and securing a lead cap assembly around the pair of lead wires and to the protective cover using a laser welding process.

A tool (100) comprises a plurality of layers (102, 104, 106) which are arranged to provide a thermally agile tool face (110) and to protect control circuitry and delicate components (150) from excessive temperatures.