JP2010167708A - Injection molding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily change the position of an injection nozzle of an injection molding machine. <P>SOLUTION: In an injection device 120 of the injection molding machine 101 having two units of injection device bodies 18, a Y direction moving means 23 using a ball screw mechanism is provided with respect to the respective injection device bodies 18 between a frame 1 and the respective injection device bodies 18. The respective injection device bodies 18 are respectively independently moved by a worker turning the dial knob 30 connected to an end part of a ball screw 27 in the Y direction (horizontal direction orthogonal to a mold clamping direction). <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an injection molding machine having two injection nozzles.

  For example, when a long member such as a protector for a wire harness of a vehicle as shown in FIG. 6 is injection-molded, two gates serving as molten resin injection ports are provided, and the molten resin is injected into each gate with a predetermined time difference. A molding method is known (see Patent Document 1). That is, after the resin filled from the primary side gate is solidified (after a predetermined time), the remaining molten resin is injected into the secondary side gate. At this time, in the primary side molding, because of incomplete filling, only the resin flow pressure is generated inside the molding die, resulting in a low pressure. Further, in the secondary side molding, since the resin injected to the primary side has already been cooled and solidified, the substantial projected area of the cavity is reduced, and the mold clamping force is correspondingly reduced.

  In order to carry out the molding method described above, two injection nozzles are required in the injection apparatus. An injection molding machine having two injection nozzles is known, for example, as a two-color molding machine (see Patent Document 2). However, in an injection molding machine having two conventional injection nozzles, it is difficult to change the position of the injection nozzle. Thereby, the position of the gate in the mold is fixed, and the degree of freedom in designing the mold is reduced. As a result, it is difficult to form a protector having various shapes with one injection molding machine, and a dedicated injection molding machine is required for each.

JP 2002-355866 A Japanese Patent Laid-Open No. 5-104577

  This invention makes it a subject to make it possible to change easily the position of the injection nozzle of an injection molding machine in view of the above-mentioned situation.

The present invention for solving the above problems is as follows.
A mold clamping device that clamps the fixed mold and the movable mold by bringing the movable mold mounting board to which the movable mold is attached close to the fixed mold mounting board that is arranged in a fixed state on the frame and to which the fixed mold is attached;
The molten resin is injected into a cavity formed between the fixed mold and the movable mold, which are arranged opposite to the surface of the fixed mold mounting plate opposite to the fixed mold mounting surface and clamped by the mold clamping device. An injection molding machine comprising:
The injection device includes two injection device main body portions arranged at a predetermined interval in a width direction that is a horizontal direction intersecting an axis that is the center of the mold clamping direction of the mold clamping device,
In each injection device main body, an injection nozzle that comes into contact with a gate portion serving as an injection port of the molten resin into the cavity of the fixed mold through the fixed mold mounting plate faces the opposite surface of the fixed mold. Projecting,
The frame is provided with a width direction moving means for moving each injection device main body in the width direction,
The fixed mold to be attached to the fixed mold mounting board is provided with two gate portions at a predetermined interval, and the injection device main body corresponding to the interval between the fixed mold gate portions by the width direction moving means. Part has been moved,
The intervals between the injection device main body portions are adjusted corresponding to the intervals between the fixed-type gate portions, so that the injection nozzles are in contact with the fixed-type gate portions.

  The injection molding machine according to the present invention is configured as described above, and includes two injection device main bodies in the injection device. And each injection device main-body part moves to the width direction (horizontal direction which cross | intersects a mold clamping direction) by the width direction moving means provided between the frames. Thereby, even if the interval between the fixed-type gate portions serving as the injection ports of the molten resin is different because the molded product is different, by adjusting the position of each injection device main body portion with the width direction moving means, It is possible to match the interval between the gate portions of the fixed molds of different molded products. As a result, it is possible to deal with molded products of various shapes with a single injection molding machine, and the effect that the degree of freedom in designing the mold is increased. The interval between the injection apparatus main body portions may be adjusted before or after the molding die is attached.

  The width direction moving means is provided for each of the two injection device main body portions, and each injection device main body portion can be moved independently of each other by operating each width direction moving means. desirable.

  Thereby, even if it is a case where the position of one gate part is changed among the two gate parts in a fixed type | mold, the injection nozzle of each injection apparatus main-body part can be arrange | positioned facing each gate part.

  The width direction moving means can include a ball screw screwed to a nut member attached to each injection device main body, and a driving means for driving and rotating the ball screw.

  Since the width direction moving means can be configured by using a ball screw and a nut member, which are highly versatile parts, the cost becomes low and maintenance is easy.

The movement operation part or driving means of the width direction moving means is a dial knob connected to one end of the ball screw,
Each injection device main body may move in the width direction by manually rotating the dial knob.

  Since the operator moves each injection device main body by turning the dial knob, the operation is simple. In particular, when the dial knob is provided with a pointer and a scale, the moving position of each injection device main body can be finely adjusted by visual observation.

  It is desirable to provide locking means for locking each injection device main body part, in which the position of the injection nozzle has been changed by the width direction moving means, so that it cannot move at that position.

  Thereby, each injection apparatus main-body part after moving is locked so that it cannot move at the position. This locking means is, for example, a taper pin.

And the injection molding machine of this invention for solving the above-mentioned subject is
A common mold clamping device that molds a mold composed of a fixed mold and a movable mold that can be exchanged as a set, and forms a cavity for each mold;
At least two injection nozzles that are formed in the mold for each set and are formed at specific intervals and individually contacted with at least two injection ports communicating with the respective cavities, and each of the injection nozzles is a molten resin An injection molding machine comprising: a resin supply unit that supplies the injection nozzle; and an injection device that includes at least two injection device main bodies including an injection nozzle moving mechanism that moves each injection nozzle in a direction that contacts and separates from the injection port. In
When the interval between the injection ports of the mold attached to the mold clamping device and the interval between the injection nozzles of the injection device main body do not match, in order to match it,
Each injection nozzle or the entire injection device main body including the injection nozzle can be moved in the width direction, which is a direction intersecting the axis of the injection nozzle, so as to enlarge or reduce the interval between the injection nozzles. A width direction moving means supported by
The injection nozzle or the injection device main body supported by the width direction moving means is arranged such that the interval between the injection ports of the mold coincides with the interval between the injection nozzles in the width direction so that the injection ports and the injection nozzles are A moving operation unit or driving means for moving until facing each other;
It is characterized by providing.

It is a front view of the injection molding machine 101 of 1st Example of this invention. It is also a plan view. Similarly, it is a right side view. 2 is a perspective view of an injection device 120. FIG. Similarly, it is a rear view 1. (A) is a front view of the protector 130, and (b) is a front view of another protector 131. It is operation | movement explanatory drawing when the protector 130 is injection-molded. It is operation | movement explanatory drawing when another protector 131 is injection-molded. It is a figure explaining another advantage by moving injection device main-body part 18. FIG. It is a rear view of the injection apparatus 120 of the injection molding machine 102 of 2nd Example. (A) is a top view of the injection apparatus 120 of the injection molding machine 103 of 3rd Example, (b) is operation | movement explanatory drawing of the state which isolate | separated the injection apparatus 120 similarly.

  Hereinafter, embodiments of the present invention will be described in detail. 1 is a front view of an injection molding machine 101 according to a first embodiment of the present invention, FIG. 2 is also a plan view, FIG. 3 is a right side view, FIG. 4 is a perspective view of an injection device 120, and FIG. It is.

  As shown in FIGS. 1 to 3, a mold clamping device 110 and an injection device 120 are mounted on the frame 1 of the injection molding machine 101 according to the first embodiment of the present invention. Here, the mold clamping direction (longitudinal direction of the frame 1) of the mold clamping device 110 is described as “X direction” and is denoted by reference numeral “X”, and the horizontal direction (width direction) orthogonal to the X direction is “Y direction”. And indicated by the symbol “Y”.

  First, the mold clamping device 110 will be described. As shown in FIGS. 1 and 2, a fixed mold mounting plate 3 to which the fixed mold 2 is mounted is fixed to a substantially central portion in the longitudinal direction (X direction) of the frame 1 of the injection molding machine 101. In addition, a support plate 4 facing the fixed mounting plate 3 is fixed to one end portion of the frame 1 (left end portion in the drawing view of FIG. 1). Four tie rods 5 are attached in a bridging state to the corners of the fixed mounting plate 3 and the support plate 4. A movable mounting plate 7 to which the movable mold 6 is mounted is disposed between the fixed mold mounting plate 3 and the support plate 4. Four tie rods 5 are inserted through the corners of the movable mounting board 7. The movable mounting plate 7 is guided by the four tie rods 5 and can move between the fixed mounting plate 3 and the support plate 4 in the X direction. 1 and 2, both the fixed mold 2 and the movable mold 6 are indicated by two-dot chain lines.

  The support plate 4 and the movable mounting plate 6 are connected by a ball screw 8. The axis CL of the ball screw 8 is disposed at the center position of the support board 4 and the movable mounting board 6. One end of the ball screw 8 is fixed to the movable mounting board 7. The other end of the ball screw 8 is threadedly inserted into a nut member 9 attached to the support board 4, and a pulley 10 is mounted at a position protruding from the support board 4. A mold clamping motor 11 for driving and rotating the ball screw 8 is attached to a portion of the frame 1 below the support plate 4. A belt 13 is hung between a pulley 10 of the ball screw 8 and a motor pulley 12 attached to a motor shaft of the mold clamping motor 11, and by rotating the motor shaft of the mold clamping motor 11 in a predetermined direction, The ball screw 8 is driven to rotate in a predetermined direction. As a result, the movable mounting board 7 is guided by the four tie rods 5, and approaches / separates toward the fixed mounting board 3. Then, the movable mold 6 of the movable mold mounting plate 7 is pressed against the fixed mold 2 by two hydraulic cylinders 14 mounted on both sides of the ball screw 8, and a clamping force is applied to them.

  Next, the injection device 120 will be described. As shown in FIGS. 1 to 3, the injection device 120 is disposed on the back side of the mounting surface 3 a of the fixed mold 2 in the fixed mold mounting plate 3. The injection device 120 includes a heating cylinder 15 that measures and melts a resin material, an injection cylinder 16 that extrudes a molten resin material (molten resin) and injects only a fixed amount, an injection nozzle 17 that is attached to the tip of the injection cylinder The injection device main body 18 has a base plate 19 on which the injection device main body 18 is placed. In the case of the injection device 120 of the first embodiment, two injection device main body portions 18 are arranged in the Y direction so as to sandwich the axis CL. Since the configuration of each injection device main body 18 is the same, only the front side (operator side) injection device main body 18 will be described in this specification. If necessary, the front side injection device main body 18 and the members constituting the same are denoted by a symbol “a”, and the rear side injection device main body 18 and the members constituting the same are denoted by a symbol “b”. To distinguish. In FIG. 1 to FIG. 3, the illustration of a hopper for supplying a pellet-shaped resin material to the heating cylinder 15 is omitted.

  As shown in FIG. 4, the base plate 19 is provided with X-direction moving means 20 for moving the injection device main body 18 in the X direction. The X direction moving means of the first embodiment is a guide rail mechanism. That is, on the upper surface of the base plate 19, a pair of guide rails 21 are laid along the X direction at a constant interval in the Y direction. And the guide member 22 attached to four places of the bottom face part of the injection device main-body part 18 is fitted by the corresponding guide rail 21. As shown in FIG. The injection device main body 18 is guided by a pair of guide rails 21 and is movable in the X direction. This movement is performed by, for example, a hydraulic cylinder or a motor.

  As shown in FIGS. 4 and 5, Y direction moving means 23 for moving the injection device main body 19 in the Y direction is provided between the frame 1 and the base plate 19. The Y direction moving means 23 of the first embodiment is a ball screw mechanism. That is, a pair of guide blocks 24 are fixed to both ends in the X direction on the bottom surface of the base plate 19, and the guide bars 25 are inserted into these guide blocks 24. Each guide bar 25 is attached along the Y direction, and both end portions thereof are supported by guide brackets 26 fixed to both end portions of the frame 1 in the Y direction. A pair of ball screws 27 are attached between the pair of guide bars 25 so as to be parallel to the guide bar 25 at a predetermined interval in the X direction. The pair of ball screws 27 are rotatably supported by guide brackets 28 fixed to both ends in the Y direction of the frame. Of the pair of ball screws 27, the ball screw 27 (27a) on one side (the side close to the fixed mounting plate 3) is the base plate 19 (19a) on which the injection device main body 18 (18a) on the near side is placed. The nut member 29 (29a) attached to the bottom portion is screwed. The ball screw 27 (27b) on the other side is screwed to a nut member 29 (29b) attached to the base plate 19 (19b) on which the injection device main body 18 (18b) on the back side is placed (FIG. 5). reference).

  The front end of each ball screw 27 protrudes from the guide bracket 28, and a dial knob 30 is attached to the protruding portion. The outer peripheral edge of the dial knob 30 has a wave shape so that the operator can easily grip it, and a pointer and a fine adjustment scale 31 are provided at the center. When the operator turns the dial knob 30 (30a) in a predetermined direction, the ball screw 27 (27a) rotates in the same direction. Thereby, the injection device main body 18 (18a) on the near side moves in the Y direction by an amount corresponding to the pitch of the ball screws 27 (27a) while being guided by the pair of guide bars 25. Similarly, when the operator turns the dial knob 30 (30b) in a predetermined direction, the ball screw 27 (27b) rotates in the same direction, and the injection device main body 18 (18b) on the back side moves in the Y direction. . Thus, when the operator turns the dial knob 30, each injection device main body 18 can be moved in the Y direction, and the positions of the injection nozzles 17 can be changed.

  Next, a molded product molded by the injection molding machine 101 of the first embodiment will be described. As shown in FIG. 6A, the molded product is a long member such as a protector 130 for a wire harness of a vehicle. Then, as shown in FIG. 7, the molten resin is injected from the two gates 32 and 33 (gate portions) in the fixed mold 2 with a time difference. For this reason, the fixed mold 2 is provided with two sprues 34 and 35. In addition, the fixed mold mounting plate 3 is provided with nozzle passage holes 36 for passing the injection nozzles 17 corresponding to the sprues 34 and 35 of the fixed mold 2. A cavity 37 corresponding to the protector 130 is formed in the fixed mold 2. The interval L1 between the injection nozzles 17 is set to be the same as the interval L1 between the two gates 32 and 33 in the molded product 130. As a result, the injection nozzles 17 of the two injection device main body portions 18 are arranged to face the gates 32 and 33 of the fixed mold 2. The molten resin may be injected at the same time. The “gate portion” in this specification is a concept including the gates 32 and 33 and their peripheral portions (for example, the sprues 34 and 35).

  The operation of the injection molding machine 101 of the first embodiment will be described. As shown in FIGS. 1 and 2, the fixed mold 2 of the protector 130, which is an example of a molded product, is mounted on the fixed mold mounting board 3, and the movable mold 6 of the protector 130 is mounted on the movable mold mounting board 7. . As shown in FIGS. 4 and 5, the Y-direction positions of the two injection device main body portions 18 are adjusted by the operator turning the dial knob 30 corresponding to each injection device main body portion 18 in a predetermined direction. . Thereby, the interval L1 between the injection nozzles of the two injection apparatus main body portions 18 is set to be the same as the interval L1 between the gates 32 and 33 of the fixed mold 2. In addition, the injection nozzle 17 (17a) of the injection device main body 18 (18a) on the front side is disposed opposite to the first gate 32 of the protector 130, and the injection nozzle of the injection device main body 18 (18b) on the back side. 17 (17b) is disposed opposite to the second gate 33 of the protector 130 (see FIG. 7).

  The mold clamping motor 11 constituting the mold clamping device 110 is operated, and the ball screw 8 rotates in a predetermined direction. Thereby, the movable mounting board 7 approaches the fixed mounting board 3. Then, the cylinder rods (not shown) of the two hydraulic cylinders 14 move forward, and the fixed mold 2 and the movable mold 6 are clamped. Subsequently, the X-direction moving means 20 of the injection device 120 is operated to move each injection device main body 18 toward the fixed mold mounting plate 3 so that each injection nozzle 17 contacts the fixed mold 2 (nozzle touch). . In this state, molten resin is injected from each injection device main body 18 into the cavity 37 formed between the fixed mold 2 and the movable mold 6 with a time difference. After holding the pressure in this state of clamping, the movable mold mounting plate 7 is separated from the fixed mold mounting plate 3 to open the mold. Then, the molded product (protector 130) released from the movable mold 6 is discharged by a protruding means (not shown).

  Next, a case where the fixed mold 2 and the movable mold 6 are exchanged in order to injection mold another molded product with the injection molding machine 101 of the first embodiment (replacement) will be described. Another molded product is, for example, the protector 131 shown in FIG. 6B, and the distance L2 between the gates 38 and 39 is longer than the distance L1 between the gates 32 and 33 of the protector 130 (L1). <L2). In this case, the operator operates the Y direction moving means 23 to move each injection device main body 18 in the Y direction. That is, as shown in FIGS. 4 and 5, the operator turns each dial knob 30 in a predetermined direction. Then, the ball screw 27 connected to each dial knob 30 rotates in the same direction. Each injection device main body 18 is regulated by a pair of guide bars 25 so as to be movable only in the Y direction, and each injection device main body 18 is moved in the Y direction by the action of the ball screw 27 and the nut member 29. Moving. Since the dial knobs 30 of the ball screws 27 for moving the injection device main body portions 18 are all provided on the front side, the operator can turn the dial knob 30 at the same position. Since each dial knob 30 is provided with a pointer and a scale 31, fine adjustment of the position of each injection device main body 18 is easy. The two injection device main body portions 18 move independently of each other.

  As shown in FIG. 8, by the above-described operation, the interval L2 between the injection device main body portions 18 is matched with the interval L2 between the gates 38 and 39 of the protector 131 which is another embodiment of the molded product, and Each injection nozzle 17 can be disposed opposite to the corresponding gate 38, 39. As a result, a single injection molding machine 101 can perform injection molding of a plurality of types of molded products having different distances L1, L2 between the gates 32, 33, 38, 39. In addition, the changeover operation is easy because it is only necessary to turn the dial knob 30. As a result, a single injection molding machine 101 can cope with a plurality of types of molded products, and can be adapted to high-mix low-volume production.

  Another advantage of being able to move the injection device main body 18 will be described. As shown in FIG. 9 (a), in normal injection molding, a gate 41 is provided at the central portion of the fixed mold 2 (the portion of the axis CL). This is because the mold clamping force acting on the cavity 37 in this case becomes the most uniform. However, when the portion where the gate 41 is provided is a design surface of the molded product, the gate mark remains on this surface, and the aesthetics of the molded product is deteriorated. If the gate 42 is provided on a surface other than the design surface, the overall length of the runner 43 is increased as shown in FIG. However, when the injection device main body 18 can be moved in the Y direction as in the injection molding machine 101 of the present embodiment, a gate 42 is provided on the non-design surface as shown in FIG. As a result, the overall length of the runner 44 can be shortened. Thereby, the injection quantity of molten resin can be decreased, without reducing the aesthetics of a molded article.

  Further, it is easy to shorten the runner 44 to “runnerless”.

  In the injection molding machine 101 of the first embodiment described above, the two injection device main body portions 18 can be moved independently of each other. However, like the ball screw 45 constituting the injection device 120 of the injection molding machine 102 of the second embodiment shown in FIG. 10, the right screw portion 46 is provided from the axial center to the front side (left side in the drawing). It is also possible to form the left screw portion 47 on the back side (also on the right side). In the case of the injection device 120 of this embodiment, when the operator turns the dial knob 30, the injection device main body portions 18 relatively approach and separate from each other. For this reason, the injection molding machine 102 of the second embodiment has an advantage that only one ball screw 45 is used for the Y-direction moving means 23 of the injection device 120.

  In the case of the injection devices 120 of the injection molding machines 101 and 102 of the first and second embodiments, each injection device main body 18 moves when the operator turns the dial knob 30. However, the ball screws 27 and 45 may be driven and rotated by a motor. Further, the Y-direction moving means 23 may be a guide rail mechanism similar to the X-direction moving means 20, and each injection device main body 18 may be moved by the power of a hydraulic cylinder, a motor or the like.

  Next, an injection molding machine 103 according to the third embodiment will be described. As shown in FIG. 11, a base plate 48 is attached to the upper surface of the portion of the frame 1 where the injection device 120 is disposed. An end portion in the X direction of the base plate 48 is slightly higher, and a guide wall portion 49 is formed on the inner surface thereof. And the base plate 19 of each injection device main-body part 18 is mounted so that isolation | separation from the base plate 48 is possible (refer FIG.10 (b)). When each injection device main body 18 is placed on the base plate 48, the end surface portion 19 a of the base plate 19 contacts the guide wall portion 49 of the base plate 48. When the injection apparatus main body 18 is moved in the Y direction, the entire injection / injection apparatus main body 18 is slid in the Y direction while the end surface 19a of the base plate 19 is in contact with the guide wall 49 of the base plate 48. At this time, the position in the X direction of the injection device main body 18 is unchanged. That is, in the injection molding machine 103 of the third embodiment, the Y-direction moving means 23 is that the operator slides the injection device main body 18.

  And in order to fix the injection apparatus main body part 18 after moving to the position, the taper pin 51 (locking means) penetrates the base plate 19 and is driven into the frame 1. For this reason, taper pin holes 52 and 53 are provided in the base plate 19 and the base plate 48 in advance. It is desirable to provide a large number of taper pin holes 53 in the base plate 48 at predetermined intervals. Thereby, it can respond to the molded product of various shapes.

  In the case of the injection molding machine 103 according to the third embodiment, the molding machine 103 is used for a molded product that requires less setup changes. And there exists an advantage that the structure of the Y direction moving means 23 becomes simple.

  In the conventional injection molding machine, since it is difficult to adjust the interval between the two injection device main body portions 18, the injection molding is performed at a constant interval regardless of the shape of the molded product. For this reason, it has been difficult to perform optimal injection molding according to the molded product. However, in the injection molding machines 101 to 103 of the present embodiment, each injection device main body 18 can be moved in the Y direction. For this reason, while being able to respond | correspond to the molded product of various shapes with one injection molding machine, there exists an effect that the freedom degree with respect to design of a shaping | molding die becomes large.

  In addition, the two injection device main bodies of each of the embodiments described above are used as a single unit, and this injection nozzle is brought into contact with one injection port (gate portion) on the mold side, or a plurality of shots between the molds. It is also possible to perform injection by sequentially contacting the outlets. The injection molding machine is as follows.

A common mold clamping device that molds a mold composed of a fixed mold and a movable mold that can be exchanged as a set, and forms a cavity for each mold;
An injection nozzle that is formed at a unique position of the mold for each set and is in contact with an injection port that communicates with the cavity, a resin supply unit that supplies molten resin to the injection nozzle, and the injection nozzle with respect to the injection port In an injection molding machine comprising: an injection apparatus having an injection apparatus main body including an injection nozzle moving mechanism that moves in a contact / separation direction;
When the axes of the injection port of the molding die attached to the mold clamping device and the injection nozzle of the injection device main body do not match, in order to match it,
A width direction moving means for supporting the injection nozzle or the whole of the injection apparatus main body including the injection nozzle so as to be movable in a width direction that is a direction intersecting the axis of the injection nozzle;
A moving operation unit or driving means for moving the injection nozzle or the injection apparatus main body supported by the width direction moving means until the injection nozzle and the axis of the injection nozzle coincide in the width direction;
An injection molding machine comprising:

  INDUSTRIAL APPLICABILITY The injection molding machine according to the present invention can be used for production of long-sized injection molded products that are produced in small quantities.

101-103 Injection molding machine 110 Clamping apparatus 120 Injection apparatus 1 Frame 2 Fixed mold (molding mold)
3 fixed mold mounting board 3a mounting surface 6 movable mold (molding mold)
7 Movable mounting board 15 Heating cylinder (resin supply part)
17 Injection nozzle 18, 18a, 18b Injection device main body 20 X direction moving means (injection nozzle moving mechanism)
23 Y direction moving means (width direction moving means)
27, 45 Ball screw 29 Nut member 30 Dial knob (moving operation unit, driving means)
32, 33, 38, 39, 41, 42 Gate (gate part)
34, 35 Sprue (gate part)
37 Cavity 51 Tapered pin (locking means)
CL Axis L1, L2 Interval XX direction (Clamping direction)
Y Y direction (width direction)

Claims (6)

A mold clamping device that clamps the fixed mold and the movable mold by bringing the movable mold mounting board to which the movable mold is attached close to the fixed mold mounting board that is arranged in a fixed state on the frame and to which the fixed mold is attached;
The molten resin is injected into a cavity formed between the fixed mold and the movable mold, which are arranged opposite to the surface of the fixed mold mounting plate opposite to the fixed mold mounting surface and clamped by the mold clamping device. An injection molding machine comprising:
The injection device includes two injection device main body portions arranged at a predetermined interval in a width direction that is a horizontal direction intersecting an axis that is the center of the mold clamping direction of the mold clamping device,
In each injection device main body, an injection nozzle that comes into contact with a gate portion serving as an injection port of the molten resin into the cavity of the fixed mold through the fixed mold mounting plate faces the opposite surface of the fixed mold. Projecting,
The frame is provided with a width direction moving means for moving each injection device main body in the width direction,
The fixed mold to be attached to the fixed mold mounting board is provided with two gate portions at a predetermined interval, and the injection device main body corresponding to the interval between the fixed mold gate portions by the width direction moving means. Part has been moved,
Injection molding, characterized in that the intervals between the injection device main body portions are adjusted corresponding to the intervals between the fixed mold gate portions so that the injection nozzles come into contact with the fixed mold gate portions. Machine.   The width direction moving means is provided for each of the two injection device main body portions, and each injection device main body portion moves independently of each other by operating each width direction moving means. The injection molding machine according to claim 1.   The said width direction moving means is provided with the ball screw screwed together by the nut member attached to each said injection apparatus main-body part, and the drive means which drive-rotates the said ball screw, It is characterized by the above-mentioned. The injection molding machine described in 1. The movement operation part or driving means of the width direction moving means is a dial knob connected to one end of the ball screw,
4. The injection molding machine according to claim 3, wherein each of the injection device main body portions moves in the width direction when the dial knob is manually rotated.   5. The apparatus according to claim 1, further comprising: a lock unit that locks each of the injection device main bodies, the position of the injection nozzle of which has been changed by the width direction moving unit, so as not to move at that position. Injection molding machine. A common mold clamping device that molds a mold composed of a fixed mold and a movable mold that can be exchanged as a set, and forms a cavity for each mold;
At least two injection nozzles that are formed in the mold for each set and are formed at specific intervals and individually contacted with at least two injection ports communicating with the respective cavities, and each of the injection nozzles is a molten resin An injection molding machine comprising: a resin supply unit that supplies the injection nozzle, and an injection device that includes at least two injection device main bodies including an injection nozzle moving mechanism that moves each injection nozzle in a direction that contacts and separates from the injection port. In
When the interval between the injection ports of the mold attached to the mold clamping device and the interval between the injection nozzles of the injection device main body do not match, in order to match it,
Each injection nozzle or the entire injection device main body including the injection nozzle can be moved in the width direction, which is a direction intersecting the axis of the injection nozzle, so as to enlarge or reduce the interval between the injection nozzles. A width direction moving means supported by
The injection nozzle or the injection device main body supported by the width direction moving means is arranged such that the interval between the injection ports of the mold coincides with the interval between the injection nozzles in the width direction so that the injection ports and the injection nozzles are A moving operation unit or driving means for moving until facing each other;
An injection molding machine comprising:

Images