An injection molding apparatus includes an electric motor, a torque variable mechanism that changes an output torque of the electric motor, and a screw driving unit that transmits the output torque of the torque variable mechanism to a feed screw, whereby the feed screw is turned by the electric motor, the torque variable mechanism and the screw driving unit. The torque variable mechanism applies, to the feed screw, a torque equivalent to a hydraulic drive. The electric motor is interchangeable with a hydraulic motor to enable the injection molding apparatus to change between electric and hydraulic drive of the feed screw.

A mould tool (100) has a first part (102) defining a first area (114) of a mould profile, an actuated part (130) defining a second, adjacent area (132) of the mould profile, which actuated part is configured to move from a moulding position to an actuated position at the end of each mould cycle to facilitate removal of a moulded component. The actuated part (130) comprises a temperature control apparatus (108) configured to control the temperature of the actuated part to influence a clearance (C) between the first part and the actuated part by thermal expansion and/or contraction of the actuated part.

An injection molding apparatus includes a melting section configured to melt a solid material into a shaping material and a nozzle configured to inject the shaping material supplied from the melting section into a mold. The melting section includes a screw having a groove forming surface on which a groove is formed, a barrel having an opposed surface opposed to the groove forming surface, a communication hole communicating with the nozzle being provided in the barrel, a heating section configured to heat the solid material supplied to between the screw and the barrel, a driving motor, a first gear configured to transmit a driving force of the driving motor to the screw and rotate the screw, and a first injecting section including a first injection port for injecting a first lubricant and a first injection path leading from the first injection port to the first gear.

A self-lubricating alignment mold or bar lock assembly which has male and female lock halves with slidably contacting engagement surfaces formed with lubricant-retaining recesses deep enough to hold lubricant that re-lubricates the engagement surfaces during slidable contact therebetween shallow enough to be self-cleaning by shedding debris that ordinarily would cause abrasive wear. The recesses are uniformly spaced and arranged into an array of uniformly spaced rows and columns of recesses that define a lubricant-film retaining region of the engagement surface. Recesses form at least 40% of the total area of the engagement surface and overlap adjacent recesses in adjacent rows and columns providing uniform re-lubrication and lubricant distribution. Each recess has a depth no greater than 25 microns deep enough to hold lubricant but shallow enough to shed debris into an adjacent deeper debris well. Each debris well serves as a gravity feed lubricant reservoir that returns lubricant to recesses.

A self-lubricating alignment mold or bar lock assembly which has male and female lock halves with slidably contacting engagement surfaces formed with lubricant-retaining recesses deep enough to hold lubricant that re-lubricates the engagement surfaces during slidable contact therebetween shallow enough to be self-cleaning by shedding debris that ordinarily would cause abrasive wear. The recesses are uniformly spaced and arranged into an array of uniformly spaced rows and columns of recesses that define a lubricant-film retaining region of the engagement surface. Recesses form at least 40% of the total area of the engagement surface and overlap adjacent recesses in adjacent rows and columns providing uniform re-lubrication and lubricant distribution. Each recess has a depth no greater than 25 microns deep enough to hold lubricant but shallow enough to shed debris into an adjacent deeper debris well. Each debris well serves as a gravity feed lubricant reservoir that returns lubricant to recesses.

A mould closing unit (100) for an injection-moulding machine has an electromechanical closing mechanism (M) for opening and closing an injection mould, said electromechanical closing mechanism (M) being actuated by means of at least one spindle unit (10) having at least one spindle (12) and at least one spindle nut (14). Cooling by way of cooling ducts (32) for heat dissipation from the spindle unit (10) is provided. Since the spindle (12) has, in the core, at least one bore (24) in which a cooling and/or lubricating medium is passed into the region of the contact points between the spindle nut (14) and the spindle (12) via at least one lance (20), efficient cooling of the spindle unit is achieved.

A mould closing unit (100) for an injection-moulding machine has an electromechanical closing mechanism (M) for opening and closing an injection mould, said electromechanical closing mechanism (M) being actuated by means of at least one spindle unit (10) having at least one spindle (12) and at least one spindle nut (14). Cooling by way of cooling ducts (32) for heat dissipation from the spindle unit (10) is provided. Since the spindle (12) has, in the core, at least one bore (24) in which a cooling and/or lubricating medium is passed into the region of the contact points between the spindle nut (14) and the spindle (12) via at least one lance (20), efficient cooling of the spindle unit is achieved.

A mold clamping mechanism includes a seal member for sealing in lubricant that has leaked from a through-hole, attached to a peripheral side surface of a tie bar exposed from the moving platen, and a housing that is separate from the moving platen, contacts a surface of the moving platen, and covers the tie bar, from the moving platen to the seal member, and the seal member.

A mold clamping mechanism includes a seal member for sealing in lubricant that has leaked from a through-hole, attached to a peripheral side surface of a tie bar exposed from the moving platen, and a housing that is separate from the moving platen, contacts a surface of the moving platen, and covers the tie bar, from the moving platen to the seal member, and the seal member.

A lubricant pump device includes a lubricant cartridge having a tank in which a lubricant is accommodated, and a pump body which is coupled to the lubricant cartridge and receives the lubricant from the lubricant cartridge, wherein the pump body includes a suction path into which the lubricant accommodated in the tank is introduced, a discharge path through which the lubricant introduced from the suction path is supplied to a lubricant path, a temporary storage path disposed between the suction path and the discharge path, a pressure detector provided at one side of the discharge path and configured to measure an internal pressure of the discharge path, and a lubricant supply controller including a cylinder communicating with the temporary storage path and a piston accommodated in the cylinder and moved forward and backward in a longitudinal direction of the cylinder.