An extruding unit, a forming roll unit and a thick portion forming mechanism are provided. The extruding unit has an ejecting slit which ejects sheet-shaped molten resin. The ejecting slit includes a standard gap portion and an enlarged gap portion. The standard gap portion is formed as a gap having a constant size. The enlarged gap portion is formed as a gap larger than the standard gap portion in a position corresponding to a thick portion. The thick portion forming mechanism forms one or several thick portions which are thicker than other portion, in the sheet-shaped molten resin continuously in the extrusion direction.

A hot runner system having a nozzle received in a well in a mold plate. The nozzle has a melt channel, a nozzle body through which the melt channel extends, and a collar connected to and spaced apart from the nozzle body. A manifold is seated against the nozzle. The manifold has a melt channel in fluid communication between a source of moldable material and the nozzle channel. A bearing member against which a seating surface of the collar is supported is received in the well, and a biasing member is seated between a step in the well and the bearing member. The biasing member has plate loading surface and a nozzle loading surface. The nozzle loading surface and the plate loading surface are concentric with the seating surface of the collar and are circumferentially offset from the seating surface of the collar in opposite directions.

There is provided a mold including a movable side mold, a fixed side mold and a sprue bush, the sprue bush including a flow path for a cooling fluid of the fixed side mold, wherein inlet and outlet ports of the flow path for the cooling fluid are in a direct connection with a cooling tube, respectively, the cooling tube being located along a space portion provided in the fixed side mold, and wherein the space portion is in a form of an opening provided in at least one of opposed surfaces of the fixed side mold.

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.

A hot runner system includes a manifold having a heater and a manifold channel network extending between a manifold inlet and a plurality of manifold outlets for distributing a molten plastic. A nozzle seated against the manifold and received in a respective manifold outlet has an extension portion received in the respective manifold outlet, a body portion projecting downstream from the extension portion, and a nozzle channel extending through the extension portion and the body portion. The hot runner system further includes a nozzle support seated against the nozzle, the nozzle support including an upstream nozzle support and a downstream nozzle support, the downstream nozzle support is discrete from and in slidable contact with the upstream nozzle support, and the downstream nozzle support having a looser fit with the body portion of the nozzle than that of the upstream nozzle support’s fit with the body portion of the nozzle.

An injection molding apparatus (10) comprising: a heatable manifold (40) arranged to receive molten injection fluid (18); one or more nozzles (20, 22, 24); a flow channel (19, 42, 44, 46) arranged to deliver the molten injection fluid to a gate (32, 34, 36) of a mold cavity (30); an electrical drive (940d, 941d, 942d) adapted to receive and distribute electrical energy in controllably varied amounts during an injection cycle; a valve pin (1040, 1041, 1042); an actuator (940, 941, 942) coupled to the valve pin, the actuator having: a driver (940dr, 941dr, 942dr), arranged to receive the controllably varied electrical energy from the electrical drive, an actuator housing (940h, 941h, 942h); a source of heat absorptive fluid (260, 125f); and at least one channel (25, 33, 125) formed in or proximate one or the other or both of the actuator housing (940h, 941h, 942h) and the drive mount (940ds, 941ds) wherein the heat absorptive fluid absorbs heat from one or the other or both of the actuator housing and the drive mount.

A hot runner process controller configured to monitor the status and operation of a hot runner system to autonomously generate information to improve the quality of injection molding process of a hot runner system having an inlet nozzle, one or more manifolds and one or more nozzles with actuator or without actuator, and one or more heating elements, the hot runner process controller is self-operating, and independent from the injection molding machine, includes: one or more sensors located on, in or at the hot runner system to detect the status and/or the operation of the hot runner system, and a processing unit and a memory. The processing unit is connected to the one or more sensors, wherein the memory stores data and program codes. The processing unit is configured to load and execute the program code to compare sensor information with the stored data and to determine if the hot runner system is in an operable status, and in case the hot runner system is in an operable status, configured to generate status information to activate the one or more heating elements and/or the one or more actuators enabling a production operation of the injection molding machine. In case the hot runner system is not in an operable status, configured to generate status information to deactivate the one or more heating elements and/or close or deactivate the one or more actuators disabling a production operation of the injection molding machine.

Apparatus for injection molding of plastic materials having a mold including at least one plate, a hot runner distributor of the fluid plastic material, at least one injector and an electric motor for controlling opening and the closing of the injector, supported by the distributor and whose cooling is carried out by means of thermal exchange contact with the plate. Provided for the cooling of the electric motor is at least one cover made of thermally conductive material at least partly surrounding the electric motor in a slidable manner and it is maintained in thermal exchange contact with the plate by means of a magnetic or an electro-magnetic force.

Apparatus for injection molding of plastic materials comprising a mold including 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 means of thermal exchange contact with the plate. Provided for the cooling of the jack actuator provided for is at least one cover 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 means of a magnetic or an electro-magnetic force.

A mold apparatus including a mold, a cooling flow path, and a sensing module is provided. The mold has a cavity. The sensing module is adapted to sense at least one of a temperature and a pressure in the cavity. The sensing module is surrounded by the cooling flow path.