Injection molding plastic parts includes furnishing resin material to a screw barrel having a rotatable screw therewithin, rotating the screw to work the resin material into a molten state, furnishing additive such as liquid color or another additive to the screw barrel interior at a first rate during screw rotation and driving the screw longitudinally from a first position to a second position to force an additive-resin material mixture resulting from screw rotation into a mold while furnishing additive with resin to the screw barrel interior at a second additive addition rate.

A controller is for an injection molding machine including an injecting member configured to push a molding material in a forward direction, the molding material containing a bioplastic; and an injection drive source configured to cause the injecting member to travel forward or backward. The controller is configured to perform filling in which a forward travel speed of the injecting member is controlled so that an actual value of a pressure applied from the injecting member to the molding material does not exceed an upper limit of the pressure. In at least a part of the filling, a value of from 550 mm/s through 700 mm/s is settable as a set value of the forward travel speed of the injecting member, and a value of 200 MPa or higher is settable as the upper limit of the pressure.

An injection device is equipped with a brake mechanism provided on a rotary shaft of an injection motor extending toward a screw side along an axial direction of the screw and configured to brake rotation of the rotary shaft, an injection motor connecting portion extending in a direction substantially perpendicular to the axial direction, and an injection motor supporting portion connected to the injection motor connecting portion so as to be adjustable in position relative to the injection motor connecting portion, and configured to support the injection motor and the brake mechanism.

A toggle lever clamping unit for an injection moulding machine includes fixed and movable platens, a support plate, a toggle lever mechanism operatively connected with both the support plate and the movable platen, a cross clamp operatively connected with the toggle lever mechanism and movable along a machine longitudinal axis, and an electric drive for moving the cross clamp. In addition, a hydraulic drive is operatively connected with the cross clamp and includes a fluid-operated piston cylinder system, with the lengths of the cylinder and the piston rod being coordinated with one another such that the hydraulic drive follows a travel path of the cross clamp as the movable platen travels between an open position of the clamping unit, in which the toggle lever mechanism is swung in, and a closed position in which the toggle lever mechanism assumes a predeterminable extended position and a clamping force is built up.

An injection device includes a spline supporting member rotatably supporting a spline shaft and attached to a pressure plate, and a nut supporting member rotatably supporting a spline nut and attached to a rear plate. The spline supporting member is provided with a spline positioning mechanism for adjusting the mounting position of the spline supporting member. The nut supporting member is provided with a nut positioning mechanism for adjusting the mounting position of the nut supporting member. The spline supporting member and the nut supporting member are formed with holes for axial-center checking, rods being inserted through the holes.

Provided is an injection molding machine (1) including a plasticizing unit (2), an injection unit (3), a communication path (5a) configured to communicate therebetween and having an opening (5b) on the plasticizing unit side which is located on an axis of the screw (21), and a backflow prevention mechanism part (6) configured to close and open the opening on the plasticizing unit side by advancing and retreating the screw (21) in the axial direction, wherein the backflow prevention mechanism part (6) includes a tapered wedge portion (61) having an inclined surface (61a), a driving portion (63) which moves the wedge portion in the forward and backward directions, and a pressing member which is pressed against the inclined surface (61a) by forward movement of the wedge portion and moves the screw toward the opening on the plasticizing unit side.

An injection molding apparatus that employs a stationary plasticating screw relative to feed port, non-reciprocal helical plasticating screw housed within an inner barrel that is coupled to a plunger head assembly, drive housing, motor and injection cylinders that is housed within an outer barrel/pressure vessel that conveys, melts, homogenizes and pumps polymeric plastic material precisely and efficiently along One axis. The helical plasticating screw is fixed in relative position within the inner barrel so that the material feed opening of the inner barrel and helical plasticating screw are aligned to accept pellets, powder or liquid of polymetric substance. The inner barrel is fixed to a plunger head assembly on the distal end that is housed within a pressure vessel with close proximity between the outside diameter of the plunger head and the inside diameter of said pressure vessel that upon screw rotation transfers polymetric material through the center passageway of said plunger head opening a normally closed one-way shut-off mechanism into said pressure vessel precisely for future displacement of polymeric mass into a mold or other. The apparatus and process of feeding, melting and injecting Polymeric material all occurs on one axis.

An injection molding machine includes a screw provided in a cylinder having a nozzle at a tip so that the screw is allowed to be driven in a rotational direction and an axial direction, a drive device configured to drive the screw, and a control device configured to control an operation of the drive device, wherein the drive device has a rotatably provided ball screw shaft and a nut screwed onto the ball screw shaft and moved forward and backward in response to rotation of the ball screw shaft, and includes a ball screw configured to drive the screw in the axial direction by forward and backward movement of the nut, and the control device sequentially moves a screw position before injection and a screw position after injection in a molding process cycle so that a forward/backward movement range of the nut in the molding process cycle is dispersed.

A screw-moving assembly (100) for a screw assembly (903), the screw-moving assembly (100) comprising: a screw-moving actuator (102); and a bias-adjustment mechanism (104); wherein the screw-moving actuator (102) and the bias-adjustment mechanism (104) are configured to connect to the screw assembly (903); the screw-moving actuator (102) is configured to transmit, in use, a screw-translation force (112) to a longitudinal central axis (905) of the screw assembly (903); and the bias-adjustment mechanism (104) is configured to transmit, in use, a biasing force (114) to the longitudinal central axis (905) of the screw assembly (903).

To provide a plasticizing device capable of easily executing maintenance of a barrel. A plasticizing device includes: a drive motor; a flat screw having a groove forming surface in which a groove is formed, and rotating around a rotation axis of the drive motor; a barrel having a facing surface facing the groove forming surface and having a communication hole formed therein; and a heating unit configured to heat a material supplied between the flat screw and the barrel. The barrel has a separate structure including, when viewed from a direction orthogonal to the rotation axis, a first barrel having the facing surface, and a second barrel separated from the facing surface.