In order to calculate a ball screw abrasion amount of an injection-axis ball screw or a mold-clamping-axis ball screw, a position of a ball nut fitted to the ball screw is photographed by a camera installed in an injection molding machine. Then, if the photographed position of the ball nut is found, as a result of analysis of an image captured by the camera, to be deviated from the position of the ball nut when a ball screw has no abrasion, it is determined that the ball screw is abraded.

In order to calculate a ball screw abrasion amount of an injection-axis ball screw or a mold-clamping-axis ball screw, a position of a ball nut fitted to the ball screw is photographed by a camera installed in an injection molding machine. Then, if the photographed position of the ball nut is found, as a result of analysis of an image captured by the camera, to be deviated from the position of the ball nut when a ball screw has no abrasion, it is determined that the ball screw is abraded.

A system of injection-moulding machine closing units is provided. In addition to two closing units of a first kind and third kind in a standard program, the closing units having closing forces F1 and F2, a further closing unit of a second kind having a closing force F1 is provided. The closing unit of the second kind forms an intermediate variable and is formed from components of the closing units of the first and third kind provided. The platens and the support plate with the dimensions of the closing unit of the third kind (closing force F2) and the toggle lever mechanism of the closing unit of the first kind (closing force F1) and the drive thereof are combined with one another. The articulated levers of the toggle lever mechanism of the closing unit of the second kind are hinged to the support plate and movable platen at a greater distance from the axis of symmetry than the articulated levers of the toggle lever mechanism of the closing unit of the first kind. The articulated levers themselves are identical. At the same time, the crosshead of the closing unit of the second kind is larger in the direction of the articulated levers of the toggle lever mechanism than the crosshead of the closing unit of the first kind such that the toggle lever mechanisms of the two closing units have the same kinematics.

An injection molding machine includes: a moving platen connected to a rear platen via a toggle link and configured to be moved closer to and away from a stationary platen; a guide rod support provided between the rear platen and the moving platen, and configured to support a guide rod for guiding a cross head of the toggle link; a safety rod fixed to the moving platen and extending toward the guide rod support; and a safety latch provided on the guide rod support and configured to restrict movement of the moving platen by engagement with the safety rod.

An injection device (2) of an injection molding machine (1) includes a heating cylinder (18) having a gas introduction port (30) and a screw (19), and a gas supply device (5) is connected to the gas introduction port (30). The gas supply device (5) includes a gas supply source (33) and a gas pressure regulating unit (34). The gas pressure regulating unit (34) regulates a gas pressure and supplies the gas when a gas from the gas supply source (33) is introduced into the gas introduction port (30). Specifically, the gas pressure is caused to change in a molding cycle and is increased to a high pressure in a metering process (61). That is, a pressure increasing period (71) in which the gas pressure increases at least partially overlaps with the metering process (61).

An injection device (2) of an injection molding machine (1) includes a heating cylinder (18) having a gas introduction port (30) and a screw (19), and a gas supply device (5) is connected to the gas introduction port (30). The gas supply device (5) includes a gas supply source (33) and a gas pressure regulating unit (34). The gas pressure regulating unit (34) regulates a gas pressure and supplies the gas when a gas from the gas supply source (33) is introduced into the gas introduction port (30). Specifically, the gas pressure is caused to change in a molding cycle and is increased to a high pressure in a metering process (61). That is, a pressure increasing period (71) in which the gas pressure increases at least partially overlaps with the metering process (61).

A clamping device includes: a stationary platen; a rear platen; a tie bar; a moving platen; a toggle mechanism connected to both the rear platen and the moving platen and used for making the moving platen advance and retreat; a guide rod having one end fixed to the rear platen and the other end extending toward the moving platen; a guide rod support supported by the tie bar at a supported part and supporting the guide rod at a supporting part; and a crosshead configured to advance and retreat under guidance by the guide rod. The advance and retreat of the crosshead expands and contracts the toggle mechanism to make the moving platen advance and retreat. The guide rod support is provided in such a manner that the supported part is arranged rearward of the supporting part and closer to the rear platen than the supporting part along a center axis.

A clamping device includes: a stationary platen; a rear platen; a tie bar; a moving platen; a toggle mechanism connected to both the rear platen and the moving platen and used for making the moving platen advance and retreat; a guide rod having one end fixed to the rear platen and the other end extending toward the moving platen; a guide rod support supported by the tie bar at a supported part and supporting the guide rod at a supporting part; and a crosshead configured to advance and retreat under guidance by the guide rod. The advance and retreat of the crosshead expands and contracts the toggle mechanism to make the moving platen advance and retreat. The guide rod support is provided in such a manner that the supported part is arranged rearward of the supporting part and closer to the rear platen than the supporting part along a center axis.

The invention is directed to an injection nozzle (1) for an injection molding device comprising. At least one closure element (4) is arranged movable in a nozzle head (2) in a first direction (a). A cam mechanism (5) comprises a cam head (6) with a cam head block (7). Per closure element (4) the cam head block (7) comprises a bracket (8). The bracket (8) comprises at least one inlay (9). Per closure element (4) the at least one inlay (9) comprises a first drive surface (10) which interacts with a second drive surface (11) arranged at the closure element (4) at least during closing of the closure element (4). The cam head block (7) per closure element (4) comprises a third drive surface (12) which interacts with a fourth drive surface (13) arranged at the closure element (4) at least during opening of the closure element (4).

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.