JP4782720B2 - Pre-plastic injection molding machine - Google Patents

Description

  The present invention relates to an injection molding machine, and more particularly to a pre-plastic injection molding machine in which a molten resin supplied from a plasticizing apparatus is extruded by a plunger and injected into a mold.

  The injection apparatus of the injection molding machine is roughly classified into an in-line type injection apparatus and a pre-plastic (pre-plasticizer) type injection apparatus. In the in-line type injection device, the molten resin is accumulated on the front side of the screw while rotating the screw to melt the resin, and the molten resin is injected to advance the screw. In the pre-plastic injection device, a plasticizing device that melts the resin and an injection device that injects the molten resin are provided independently, and the resin melted by the plasticizing device is supplied to the injection chamber of the injection device and injected. The molten resin is injected by advancing the plunger provided in the chamber. Compared to the in-line type injection device, the pre-plastic type injection device has an advantage that the resin can be plasticized and injected stably.

  In the pre-plastic injection device, it is necessary to fill the resin melted by the plasticizer into the injection chamber connected to the injection nozzle of the injection device, and the molten resin discharge nozzle of the plasticizer is guided to the injection chamber on the front side of the plunger of the injection device. Therefore, a molten resin supply passage is required. The injection chamber connected to the injection nozzle of the injection apparatus is arranged on the front side of the injection apparatus, and a fixed platen to which a fixed mold of the molding machine is attached is arranged in front of the injection apparatus. The space for it is limited.

Therefore, in an example of a conventional pre-plastic injection device, the plasticizing cylinder of the plasticizing device is arranged in a V shape with the nozzle side as the apex with respect to the plunger cylinder (firing cylinder) of the injection device, and the plasticizing device is melted. A molten resin supply passage for connecting the resin discharge nozzle to the injection chamber of the injection apparatus is provided (for example, see Patent Document 1).
JP 2000-263606 A

  In the above-described pre-plastic injection device described in Patent Document 1, a molten resin supply passage for connecting the molten resin discharge nozzle of the plasticizing device to the injection chamber of the injection device is provided, and the molten resin is transferred from the plasticizing device to the injection device. Supply. The molten resin flowing through the molten resin supply passage must be maintained at a temperature equal to or higher than the melting temperature. However, the resin stays in the molten resin supply passage bent in the shape of the vicinity of the V-shaped apex and gives an extra heat history to the resin. End up. Further, the resin remains in the molten resin supply passage, and labor and effort are required to remove the resin material before the change when the resin material is changed.

  Therefore, a structure in which the plasticizing cylinder of the plasticizing apparatus is directly connected to the injection cylinder in which the injection chamber of the injection apparatus is formed is conceivable. That is, it is a structure in which the plasticizing cylinder of the plasticizing apparatus is connected and fixed from the vertical direction to the injection cylinder in which the plunger moves. According to such a structure, the molten resin supply passage can be eliminated, and the molten resin can be efficiently supplied to the injection chamber of the injection cylinder through a short path.

  However, if the plasticizing cylinder is directly connected and fixed to the injection cylinder, the screw that rotates in the plasticizing cylinder and melts the resin is removed for maintenance, etc. It is necessary to remove the entire plasticizing apparatus including the motor and to remove the screw from the front side of the plasticizing cylinder.

  When removing the plasticizing device, the fixing bolts and the like are removed while supporting the plasticizing device. The plasticizing device includes the above-described measuring motor and plasticizing cylinder, and has a relatively large weight. Therefore, one worker cannot remove the fixing bolt or the like while supporting the plasticizing device. Accordingly, when removing the plasticizing apparatus, a plurality of workers are required, and a large force is required to support the plasticizing apparatus. This is also a problem when assembling the plasticizing apparatus.

  The present invention has been made in view of the above-described problems, and even a structure in which a plastic cylinder is directly connected and fixed to an injection cylinder can be easily removed by a single operator including a plasticizing cylinder. An object of the present invention is to provide a pre-plastic injection molding machine.

In order to achieve the above object, according to the present invention,
A pre-plastic injection molding machine that injects a previously melted resin into a mold by an injection plunger, comprising: a mold clamping device that performs mold clamping with a mold attached; and an injection device that injects molten resin into the mold The injection device includes a plasticizing device that melts and measures the resin, an injection cylinder in which the injection plunger is provided and supplied with the molten resin, and a meter that rotationally drives a screw of the plasticizing device A drive unit, and a guide mechanism that guides the metering drive unit while supporting the metering drive unit so as to move perpendicularly to the axial direction of the injection cylinder, and the guide mechanism includes an injection device to which the injection cylinder is attached. provided on the support member, the metering adjusting mechanism for adjusting the distance between the driving portion and the injection device supporting member is provided, wherein the injection device supporting member, to the through hopper for supplying resin material Opening is formed, pre-plasticization type injection molding machine, wherein the guide mechanism of the guide rails on either side of the opening is attached is provided.

In the above pre-plastic injection molding machine, the injection device may be disposed above the mold clamping device, and the injection device may move up and down together with the movable platen of the mold clamping device. Further, the metering drive unit is not good as it is movably supported hung below the injection-device support member.

  According to the present invention, since the metering drive part of the plasticizing device is supported by the guide mechanism so as to be movable with respect to the injection cylinder, the operator does not need to support the plasticizing device, and the plasticizing cylinder is fixed. Thus, the screw can be extracted from the front side of the plasticizing cylinder simply by moving the plasticizing device while being supported by the guide mechanism. Thereby, workability is improved and a single worker can easily perform maintenance of the plasticizing apparatus. Also, when the plasticizing apparatus is assembled, the plasticizing cylinder can be easily aligned by the guide mechanism.

  A pre-plastic type rigid injection molding machine according to an embodiment of the present invention will be described with reference to the drawings.

  First, an overall configuration of a pre-plastic type rigid injection molding machine according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a front view showing a schematic configuration of a pre-plastic type rigid injection molding machine according to an embodiment of the present invention.

  The pre-plated solid injection molding machine shown in FIG. 1 has a fixed platen 10 and a movable platen 12. The movable platen 12 is disposed above the fixed platen 10 and is movable in the vertical direction with respect to the fixed platen 10.

  The stationary platen 10 is attached to the upper surface of the lower frame 20. The lower frame 20 is a frame-like structure in which, for example, steel square pipe members are assembled to form a rectangular parallelepiped, and a fixed plate 22 to which the fixed platen 10 is attached is provided on the upper surface thereof. A mold clamping drive unit 24 for vertically moving the movable platen 12 is provided inside the lower frame 20.

  The mold clamping drive unit 24 is attached to the lower surface of the fixed plate 22, and the mold clamping drive unit 24 itself is configured to move in a direction perpendicular to the fixed plate 22. A plurality of tie bars 26 extend from the mold clamping drive unit 24 through the fixed plate 22 and the fixed platen 10. The movable platen 12 is fixed to the upper end portion of the tie bar 26. When the mold clamping drive unit 24 is driven to move vertically with respect to the fixed plate 22, the tie bar 26 also moves vertically together with the mold clamping drive unit 24, so that the movable platen 12 fixed to the tie bar 26 is attached to the fixed plate 22. The fixed platen 10 is moved. Thereby, opening and closing of a metal mold | die and mold clamping can be performed.

  The pre-plastic type solid injection molding machine shown in FIG. 1 has an injection device 30 above the movable platen 12. The injection device 30 includes a cylinder (injection cylinder) 32 having a plunger therein, and a drive mechanism 34 for driving the plunger. The cylinder 32 and the drive mechanism 34 are attached to a front flange 36 (injection device support member) that is a movable member that is movable in the vertical direction, and the front flange 36 is disposed on the left and right sides by two L-shaped support plates 38. Supported. The L-shaped support plate 38 is attached to the upper frame 50 through a linear guide 40 and a guide support plate 42 so as to be vertically movable.

  The upper frame 50 is a frame-like structure that is firmly attached on the lower frame 20, and is a frame-like body that is assembled, for example, by a steel square pipe to form a rectangular parallelepiped by bolting or welding. In the present embodiment, two rectangular frame bodies 52 are formed by a frame member 54 such as a square pipe, and a frame member 54 serving as a beam is connected between the two frame bodies 52 to form a rectangular parallelepiped frame body. A frame 50 is formed. The upper frame 50 is attached to the lower frame 20 and constitutes a surrounding frame that integrally surrounds the rigid injection molding machine. Therefore, the rigid injection molding machine according to the present embodiment has a structure in which the mold clamping device and the injection device are attached to the surrounding frame formed by the upper frame 50 and the lower frame 20.

  A plasticizing movement rod 44 extends downward from an L-shaped support plate 38 that is vertically movable with respect to the upper frame 50 via a linear guide 40. The lower end portion of the plasticizing movement rod 44 extends downward through the fixed platen 10 and the fixed plate 22, and is attached to the plasticizing movement drive unit 28 attached to the mold clamping drive unit 24. Since the plasticizing movement drive unit 28 moves in the vertical direction together with the mold clamping drive unit 24, when the mold clamping drive unit 24 moves, the plasticizing movement rod 44 also moves, whereby the injection device 30 moves together with the movable platen 12. Move vertically.

  Further, the plasticizing movement drive unit 28 can move the plasticizing movement rod 44 separately from the mold clamping drive unit 24. By vertically moving the plasticizing movement rod 44 by the plasticizing movement driving unit 28, the injection device 30 can be moved so as to approach and separate from the movable platen 12. That is, the plasticizing movement rod 44 is vertically moved by the plasticizing movement driving unit 28 to press the injection nozzle of the cylinder 32 of the injection apparatus 30 against the movable mold attached to the movable platen 12 (nozzle touch). Thus, the molten resin can be injected from the injection nozzle into the mold.

  In addition, the plasticizing apparatus mentioned later is attached to the horizontal direction of the cylinder 32 of an injection apparatus, and is supported with respect to the cylinder 32 by the guide mechanism so that a movement is possible.

  FIG. 2 is a perspective view showing the structure above the fixed plate 22. FIG. 2 shows a state in which the upper frame 50 and the guide support plate 42 are removed. In FIG. 2, the L-shaped support plate 38 is removed from the front flange 36 and separated.

  Although not shown in FIG. 1, a pair of guide support members 60 are fixed to the fixed platen 10. A linear guide rail is attached to the guide support member 60, and the vertical movement of the movable platen 12 is guided by the linear guide. The movable platen 12 is driven by four tie bars 26 that pass through the fixed platen 10 and are fixed to the movable platen 12 while being guided by the linear guide of the guide support member 60.

  Although not shown in FIG. 1, the pair of L-shaped support plates 38 are connected and fixed by a connection plate 46 having an opening at the center. The upper ends of the two plasticizing moving rods 44 extending through the fixed platen 10 are connected to and fixed to the connection plate 46. Therefore, the pair of L-shaped support plates 38 can be moved vertically by moving the plasticizing moving rod 44 vertically. The guide for the vertical movement at this time is performed by two linear guides 40 which are vertical movement guide mechanisms provided on each L-shaped support plate 38. The linear guide 40 is configured such that the inclination in the vertical plane is adjusted by an inclination adjusting mechanism for guiding the L-shaped support plate 38 in the vertical direction with high accuracy. Details of the linear guide 40 and the tilt adjusting mechanism will be described later.

  The front flange 36 which is a moving member is fixed by a fixing / adjusting mechanism in a state where the front flange 36 is placed on a portion extending in the horizontal direction of the pair of L-shaped support plates 38. The horizontal position of the front flange 36 with respect to the pair of L-shaped support plates 38 can be adjusted by a horizontal adjustment mechanism.

  A cylinder 32 of the injection device 30 is attached to the lower surface of the front flange 36, and the cylinder 32 extends downward through the opening of the connection plate 46. Four guide rods 33 extend upward from the front flange 36, and the rear flange 35 is fixed to the upper end of the guide rod 33. A pressure plate 37 that is movable along the guide rod 33 is provided between the front flange 36 and the rear flange 35.

  A plunger that applies pressure to the molten resin in the cylinder 32 is connected to the pressure plate 37. By moving the pressure plate 37 along the guide rod 33, the plunger is moved and the molten resin is injected from the injection nozzle of the cylinder 32. A moving mechanism for moving the pressure plate 37 is provided between the rear flange 35 and the pressure plate 37, and the pressure plate 37 is moved with respect to the rear flange 35 fixed to the guide rod 33. The rear flange 35, the pressure plate 37, the moving mechanism, and the like constitute a drive mechanism 34 for driving the plunger.

  Although not shown in FIG. 2, a plasticizing device is attached below the front flange 36. The plasticizing apparatus has a hopper that supplies resin, a screw that measures the resin while melting it, and supplies it to the cylinder 32, and a metering motor that drives the screw. The tip of the screw is attached in a state protruding from the outer peripheral surface of the cylinder 32 into the cylinder 32, and the molten resin is supplied into the cylinder 32 from the tip of the screw. The supplied molten resin is pressurized by the plunger in the cylinder 32 and is injected from the nozzle at the tip of the cylinder 32.

  In the above-described embodiment, the case of a pre-plastic type rigid injection molding machine is shown and described. However, in the case of a normal rigid injection molding machine, instead of the plunger arranged in the cylinder 32, it rotates at the time of metering. A screw that moves forward and backward during injection is provided.

  Next, the mounting structure of the linear guide 40 will be described with reference to FIG. FIG. 3 is a perspective view showing the linear guide 40 attached to the upper frame 50 and guiding the vertical movement of the L-shaped support plate 38 and its tilt adjusting mechanism.

  Each linear guide 40 has a guide rail 40A fixed to the guide support plate 42 and a slider 40B which is a movable part fixed to the L-shaped support plate 38, and the slider 40B moves along the guide rail 40A. It is configured as follows. Although the slider 40B is fixed to the L-shaped support plate 38, FIG. 3 also shows a state in which the slider 40B is attached to the guide rail 40A for convenience of illustration.

  The upper frame 50 is a rectangular parallelepiped frame-like structure as shown in FIG. A rib 56 is joined by welding or the like between the orthogonal frame members 54, and the upper frame 50 is reinforced by the rib 56. A processing plate 58 for processing surface joining is joined to the vertical frame member 54 of the frame body 52 of the upper frame 50 by welding or the like. The processing plate 58 is a metal plate member for providing a machined surface for fixing the guide support plate 42 to the upper frame 50, and is paired with one frame body 52 while being joined to the frame body 52. The machining plate 58 is machined to form one vertical plane. The upper frame 50 is attached to the lower frame 20 so that the machining surface of the processing plate 58 is vertical.

  The guide rail 40A of the linear guide 40 is firmly fixed to the inner surface of the guide support plate 42 that is a support plate. The two guide rails 40A fixed to each guide support plate 42 need to be parallel to each other and have a constant interval. In order to attach each guide rail 40A accurately and firmly, for example, a step is provided on the inner surface of the guide support plate 42 by machining, and the guide rail 40A is fixed by pressing the guide rail 40A against the step. It can be firmly and accurately attached to the guide support plate 42 (see FIG. 4 for the steps).

  The guide support plate 42 has openings 42a and 42b serving as maintenance windows between and outside the pair of guide rails 40A. The injection device and the like in the upper frame 50 can be seen through the openings 42a and 42b, and an adjustment operation described later can be performed by inserting a tool or the like.

  The guide support plate 42 is attached to the processing plate 58 of the frame 52 and is fixed by bolts or the like. A positioning pin 59 protrudes and is fixed to one of the pair of processing plates 58 of each frame 52. On the other hand, the guide support plate 42 is provided with positioning holes 42 c at positions corresponding to the positioning pins 59. When the guide support plate 42 is attached to the processing plate 58 of the frame body 52, the guide support plate 42 is attached to the frame body 52 by fitting the positioning holes 42 c of the guide support plate 42 into the positioning pins 59 of the processing plate 58. Can be positioned. Bolt holes for fixing the guide support plate 42 are made into fool holes (a relatively large hole with respect to the diameter of the bolt), so that the guide support plate 42 is rotated slightly within the mounting surface around the positioning pin 59. Thereby, the inclination in the vertical plane of the guide rail 40A can be adjusted. Even after the guide support plate 42 is assembled, the inclination of the guide rail 40A can be adjusted by loosening the bolts and slightly rotating the guide support plate 42. Thus, the mechanism for slightly rotating the guide support plate 42 is the tilt adjusting mechanism.

  The slider 40B of the linear guide 40 is fixed to the vertical surface of the L-shaped support plate 38 with a bolt or the like. Similarly to the above-described mechanism for fixing the guide support plate 42, the slider 40B fixing mechanism is provided with a pin at one position of the slider 40B, and this pin is fitted into the positioning hole of the L-shaped support plate 38 to make one point. The slider 40B may be slightly rotated and adjusted by positioning and placing other bolt holes as stupid holes. Thereby, the slider 40B can be attached and fixed to the L-shaped support plate 38 with high accuracy.

  In the present embodiment, two sliders 40B are provided for one guide rail 40A. Thus, by providing a plurality of sliders 40B for one guide rail 40A, play in the linear guide 40 is substantially reduced, and the highly accurate guide function of the linear guide 40 is maintained for a long time. . It is preferable to increase the distance between the sliders 40B within a possible range.

  A rib 38 a is provided on the orthogonal surface of the L-shaped support plate 38. Thereby, deformation of the L-shaped support plate is suppressed, and the perpendicularity of the orthogonal surfaces is maintained. In addition, the L-type support plate 38 is provided with two horizontal adjustment plate 38b. Similar to the ribs 38a, the leveling plate 38b has a reinforcing function, but is provided for adjusting the position of the front flange 36 in the horizontal direction.

  As described above, the moving direction of the injection device 30 by the linear guide 40 can be finely adjusted by finely rotating the guide support plate 42 by the tilt adjusting mechanism. Therefore, when the injection device 30 is assembled to the upper frame 50, the center axis of the cylinder 32 of the injection device 30 can be easily adjusted with high accuracy so as to coincide with the vertical direction.

  FIG. 4 is a plan view of the L-shaped support plate 38 and the front flange 36 fixed thereto. FIG. 4 shows a state in which the drive unit of the injection device 30 attached on the front flange 36 is removed. In FIG. 4, the frame member 54 of the upper frame 50 is shaded for easy identification.

  The left and right L-shaped support plates 38 are guided by four linear guides 40 provided between the left and right guide support plates 42 and are movable in the vertical direction (direction perpendicular to the paper surface). The front flange 36 is fixed by a bolt or the like in a state where it is placed on the horizontal portion of the left and right L-shaped support plates 38. The left and right L-shaped support plates 38 are fixed to both sides of the connection plate 46 as shown in FIG. Therefore, the connection plate 46, the left and right L-shaped support plates 38, and the front flange 36 can be moved together.

  As shown in FIG. 2, a plasticizing movement rod 44 is fixed to the lower surface of the connection plate 46. By moving the plasticization movement rod 44 up and down, the connection plate 46, the left and right L-shaped support plates 38, The front flange 36 can be moved vertically. Thereby, the injection device 30 attached to the front flange 36 can be moved in the vertical direction while being guided by the linear guide 40.

  The horizontal position of the movable platen 12 is determined by a guide support member 60 attached to the fixed platen 10 as shown in FIG. On the other hand, the horizontal position of the injection device 30 is determined by the position of the front flange 36. Therefore, in order to make the central axis of the cylinder 32 of the injection device 30 coincide with the central axis of the locating hole 12a (see FIG. 2) of the movable platen 12, the horizontal direction of the front flange 36 to which the injection device 30 is fixed. It is necessary to adjust the position.

  In the present embodiment, a horizontal adjustment mechanism is provided to adjust the horizontal position of the front flange 36. The leveling mechanism includes a positioning portion 36a that protrudes from the left and right side portions of the front flange 36, and bolts 36A and 36B that can slightly move and temporarily fix the positioning portion 36a.

  A plasticizing device 70 is attached to the lower surface of the front flange 36. In FIG. 4, a metering motor 72 constituting the metering drive unit of the plasticizing device 70 is shown below the front flange 36. In addition, a hopper mounting plate 74 that is a portion to which the hopper of the plasticizing device 70 is mounted appears in the notch portion of the front flange 36. The plasticizing device 70 is supported so as to be movable in the horizontal direction while being suspended by a guide mechanism provided on the lower surface of the front flange 36 as an injection device support member.

  Next, the guide mechanism provided on the lower surface of the front flange 36 will be described with reference to FIGS. FIG. 5 is a sectional view taken along line VV in FIG. 6 is a cross-sectional view taken along line VI-VI in FIG.

  As shown in FIG. 5, the plasticizing device 70 is disposed below the front flange 36 as an injection device support member. The plasticizing device 70 includes a plasticizing cylinder 71, a metering motor 72, and a hopper 73. The screw 75 disposed in the plasticizing cylinder 71 is rotationally driven by the measuring motor 72 and moves to the front of the plasticizing cylinder 71 while melting the resin material supplied from the hopper 73.

  A material supply unit 71a is attached to the rear side (the metering motor 72 side) of the plasticizing cylinder, and a metering motor attachment flange 71b is attached to the rear side thereof. The weighing motor 72 is attached to the weighing motor mounting flange 71b. A material supply pipe 76 extends upward from the material supply part 71a, and a hopper mounting plate 74 is fixed thereon. The hopper 73 is attached to the hopper attachment plate 74, and the resin material such as resin pellets supplied to the hopper 73 is supplied into the plasticizing cylinder 71 through the hopper attachment plate 74, the material supply pipe 76, and the material supply portion 71a. And melted by the screw 75.

  The tip of the plasticizing cylinder 71 of the plasticizing device 70 is connected and fixed in a state of protruding from the side surface of the cylinder 32 (injection cylinder) of the injection device 30. The cylinder 32 can be fixed by, for example, penetrating the plunger 32 from the opposite side of the plunger 32 and inserting a bolt.

  As shown in FIG. 4, the front flange 36 has a U-shaped notch or opening 36b on the side where the metering motor 72 is disposed, and the material supply pipe 76 passes through the opening 36b. It is extended. Accordingly, the hopper 73 is disposed above the front flange 36. A guide mechanism 80 that guides the horizontal movement of the plasticizing device 70 is provided at portions extending on both sides of the opening 36 b of the front flange 36.

  The guide mechanism 80 includes a pair of linear guides 81, and rails 82 of the linear guide 81 are attached to both sides of the opening 36b of the front flange 36 as shown in FIG. The slider block 83 of the linear guide 81 is movable along the rail 82. The two slider blocks 83 that move along the two rails 82 are attached to an adjustment plate 84, and the adjustment plate 84 can move in the horizontal direction while being guided by the linear guide 81.

  The measuring motor mounting flange 71b to which the measuring motor 72 of the plasticizing device 70 is mounted is attached to the adjustment plate 84, so that the entire plasticizing device 70 is supported by the guide mechanism 80 so as to be movable. .

  Here, the distance between the metering motor mounting flange 71b and the adjustment plate 84 can be adjusted. As shown in FIG. 6, a hollow adjusting bolt 85 is screwed through the adjustment plate, and a set bolt 86 is screwed into the metering motor mounting flange 71 b through the through hole of the adjusting bolt 85. By tightening the set bolt 86, the measuring motor mounting flange 71b is brought into contact with and fixed to the end of the adjusting bolt 85. Therefore, the distance between the metering motor mounting flange 71b and the adjustment plate 84 can be adjusted by adjusting the distance that the tip of the adjustment bolt 85 protrudes from the lower surface of the adjustment plate 84.

  By adjusting the distance between the metering motor mounting flange 71b and the adjusting plate 84, the vertical position of the metering motor mounting flange 71b can be adjusted, and as a result, the plasticizing cylinder 71 with respect to the axis of the injection cylinder 32. The inclination of the axis can be adjusted. Thereby, the plasticizing cylinder 71 can be accurately positioned with respect to the injection cylinder 32.

  According to the guide mechanism 80 configured as described above, when the plasticizing cylinder 71 of the plasticizing device 70 is removed from the injection plunger 32, the plasticizing device 70 can be removed even if the distal end portion of the plasticizing cylinder 71 is fixed. Since it is instructed by the guide mechanism 80, it is not necessary for the operator to support the plasticizing device 70. Further, since the plasticizing device 70 is supported by the guide mechanism 80 so as to be horizontally movable, the operator moves the plasticizing device 70 and applies the plasticizing cylinder 71 only by applying a small force to the plasticizing device 70 in the horizontal direction. Can be separated from the injection plunger 32. Also at this time, since the plasticizing apparatus is supported by the guide mechanism 80, the operator does not need to support the plasticizing cylinder 71 and only needs to apply a small force in the moving direction.

  Even after the plasticizing cylinder 71 is separated from the injection plunger 32, the plasticizing device is supported by the guide mechanism, and the operator has performed the maintenance work on the screw 75 from the tip of the plasticizing cylinder 71. Maintenance work can be performed. When the maintenance work is completed, the plasticizing device 70 is moved toward the injection cylinder 32 and the tip of the plasticizing cylinder 70 is inserted into the mounting portion of the injection cylinder 32. Also in this case, since the vertical position and horizontal movement of the plasticizing cylinder 71 are guided by the guide mechanism 80, the operator simply pushes the plasticizing device 70 toward the injection cylinder 32 to plasticize the plasticizing cylinder 71. The tip of the cylinder 71 can be easily positioned with respect to the injection cylinder 32.

  As described above, according to the present embodiment, the guide motor 80 provided on the front flange 36 (injection device support member) allows the metering motor mounting flange 71b (measurement drive unit) of the plasticizing device 70 to be connected to the injection cylinder 32. By supporting the movable body in a direction perpendicular to the axis, the labor of the operator during the maintenance of the plasticizing apparatus is reduced, and the maintenance work can be performed efficiently.

  In the above-described embodiment, the present invention is applied to a pre-plastic type solid injection molding machine. However, the present invention is not limited to a solid type injection molding machine, but can be applied to a pre-plastic type horizontal injection molding machine.

1 is a front view showing a schematic configuration of a pre-plastic type rigid injection molding machine according to an embodiment of the present invention. It is a perspective view which shows the structure above a fixing plate in FIG. It is a perspective view which shows the linear guide attached to an upper frame, and guides the perpendicular | vertical movement of an L-shaped support plate, and its inclination adjustment mechanism. It is a top view of an L-shaped support plate and the front flange fixed to it. It is sectional drawing along the VV line in FIG. It is sectional drawing along the VI-VI line in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Fixed platen 12 Movable platen 12a Locating hole 20 Lower frame 22 Fixed plate 24 Mold clamping drive part 26 Tie bar 28 Plasticizing movement drive part 30 Injection device 32 Cylinder 32a Plunger 33 Guide rod 34 Drive mechanism 35 Rear flange 36 Front flange 36a Positioning part 36b Opening part 36a-1 End face 36a-2, 36a-3 Side face 36A, 36B Bolt 36C, 36D Nut 37 Pressure plate 38 L-type support plate 38a Rib 38b Horizontal adjustment pad 40 Linear guide 40A Guide rail 40B Slider 42 Guide support plate 42a, 42b Opening 42c Positioning hole 44 Plasticizing movement rod 46 Connection plate 50 Upper frame 50
52 Frame body 54 Frame member 56 Rib 58 Processing plate 59 Positioning pin 60 Guide support member 70 Plasticizing device 71 Plasticizing cylinder 71a Material supply part 71b Measuring motor mounting flange 72 Measuring motor 73 Hopper 74 Hopper mounting plate 75 Screw 76 Material supply pipe 80 Guide Mechanism 81 Linear Guide 82 Rail 83 Slide Block 84 Adjustment Plate 85 Adjustment Bolt 86 Set Bolt

Claims (3)

A pre-plastic injection molding machine that injects a previously melted resin into a mold by an injection plunger, comprising: a mold clamping device that performs mold clamping with a mold attached; and an injection device that injects molten resin into the mold Have
The injection device
A plasticizing device for melting and weighing the resin;
An injection cylinder in which the injection plunger is provided, and a molten resin is supplied;
A metering drive for rotating the screw of the plasticizing device;
A guide mechanism for guiding the metering drive unit while supporting the metering drive unit so as to move perpendicularly to the axial direction of the injection cylinder;
The guide mechanism is provided on an injection device support member to which the injection cylinder is attached,
An adjustment mechanism for adjusting a distance between the metering drive unit and the injection device support member is provided ;
A pre-plastic injection molding characterized in that an opening through which a hopper for supplying a resin material passes is formed in the injection device support member, and guide rails of the guide mechanism are attached to both sides of the opening. Machine. A pre-plastic injection molding machine according to claim 1,
The pre-plastic injection molding machine, wherein the injection device is disposed above the mold clamping device, and the injection device moves up and down together with a movable platen of the mold clamping device. The pre-plastic injection molding machine according to claim 1 or 2,
The pre-plastic injection molding machine, wherein the metering drive unit is suspended below the injection device support member and is movably supported.

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