An injection molding apparatus comprising a clamp plate, a heated manifold, an actuator, a mold and a cooling device, wherein the cooling device comprises: a heat transmitter comprising a distal arm or member and a proximal base or member, the distal arm or member being mounted by a spring loadable interconnection or engagement to or with the proximal base or member, the clamp plate, the mold, the manifold, the actuator and the heat transmitter being assemblable together in an arrangement wherein the spring loadable interconnection is loaded urging the distal end surface of the distal arm or member into compressed engagement with the clamp plate.

An injection molding apparatus comprising a clamp plate, a heated manifold, an actuator, a mold and a cooling device, wherein the cooling device comprises: a heat transmitter comprising a distal arm or member and a proximal base or member, the distal arm or member being mounted by a spring loadable interconnection or engagement to or with the proximal base or member, the clamp plate, the mold, the manifold, the actuator and the heat transmitter being assemblable together in an arrangement wherein the spring loadable interconnection is loaded urging the distal end surface of the distal arm or member into compressed engagement with the clamp plate.

In some embodiments, an injection molding apparatus comprises: a first mold section comprising a first molding surface, wherein the first mold section is configured for attachment to a presser; a second mold section and disposed opposite the first mold section, a thermoelectric device disposed in one of the first and second mold sections and in thermal communication with at least one of the first and second mold surfaces; an electrical control system disposed in electrical communication with the thermoelectric device; the presser in mechanical communication with the first mold section and configured to move at least one of the first and second mold sections toward the other to define a molding space; and an injector for introducing a material to be molded into the molding space.

A molding system and a method for operation of the molding system are provided. The method includes flowing a molten polymeric material from an upstream device into an in-mold tuning chamber in a filling position where the in-mold tuning chamber is positioned at least partially within a mold cavity. The method also includes adjusting at least one of a temperature of and a pressure applied to the molten polymeric material in the in-mold tuning chamber to create a first tuned molten polymeric material and releasing the tuned molten polymeric material into the mold cavity from the in-mold tuning chamber.

In some embodiments, an injection molding apparatus comprises: a first mold section comprising a first molding surface, wherein the first mold section is configured for attachment to a presser; a second mold section and disposed opposite the first mold section, a thermoelectric device disposed in one of the first and second mold sections and in thermal communication with at least one of the first and second mold surfaces; an electrical control system disposed in electrical communication with the thermoelectric device; the presser in mechanical communication with the first mold section and configured to move at least one of the first and second mold sections toward the other to define a molding space; and an injector for introducing a material to be molded into the molding space; wherein at least one of the first and second mold sections is formed from a ceramic material.

Techniques disclosed herein relate to molding inserts with improved cooling performance. A mold insert includes a body and a plurality of heat sink elements coupled to the body. The body includes an area with a recessed surface that has different depths in a plurality of different regions. The plurality of heat sink elements is configured to provide different thermal resistances in the plurality of different regions of the mold insert, where a thermal resistance of the mold insert in a region with a higher recessed surface depth is lower than a thermal resistance of the mold insert in a region with a lower recessed surface depth. In some embodiments, the plurality of heat sink elements form cooling channels that are configured to conduct a cooling fluid from regions of the mold insert with higher recessed surface depths to regions of the mold insert with lower recessed surface depths.

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.

A thermoplastics injection molding process coats a field joint of a pipeline by positioning a mold tool around the field joint to define a mold cavity. Thermoplastics material injected into the mold cavity forms a field joint coating that will set in the mold cavity. As the thermoplastics material shrinks in the mold cavity while the field joint coating sets, compacting pressure is applied radially inwardly within the mold cavity against a radially outer side of the field joint coating. A compacting fluid introduced into the mold cavity between the mold tool and the field joint coating may be used to apply pressure against the field joint coating. This accelerates and controls cooling of the field joint coating while maximizing quality.

An injection molding apparatus comprising a heated manifold, an actuator comprised of an actuator housing containing a drive member interconnected to a valve pin having a drive axis, one or more heat convectors each heat convector comprised of a heat conductive leg disposed within a gap disposed between the manifold and a downstream end of the actuator housing and a heat conductive arm extending distally upstream and away from the gap such that heat is conducted from the leg to the arm upstream and away from the downstream end of the actuator housing.

An injection molding apparatus and method for adjusting the axial position of a valve pin in an injection molding system, the apparatus comprising: a top clamp plate, a heated manifold receiving and distributing an injection fluid to an exit of a fluid delivery channel to a cavity of the mold, an actuator comprising a housing having a chamber enclosing a drive member for driving a valve pin along an axial path of travel, the actuator housing slidably mounted and adapted for controlled upstream and downstream movement of the drive member along a path complementary to the axial path of travel of the valve pin, a mounting plate and an axial position adjustment screw screwably mounted within the mounting plate upstream of the housing of the actuator for controllably moving the valve pin to selectable starting or ending injection cycle axial positions.