JP6225022B2 - Molding machine - Google Patents

Description

  The present invention relates to a molding machine such as an injection molding machine or a die casting machine having a motor as a drive source, and more particularly to a molding machine using a motor as a drive source for filling a mold cavity with a molten material.

  A general injection molding machine that has been conventionally used is roughly composed of a mold clamping unit and an injection unit. The mold clamping unit includes a fixed mold and a movable mold. The mold is opened and closed by advancing and retracting the movable mold with respect to the mold by a movable means that enables clamping such as a toggle mechanism or a direct pressure method.

  In addition, in the injection unit, a screw provided in a heating cylinder via a ball screw mechanism or the like that transmits a driving force via a pulley or a belt by a rotating force of a motor as a driving source and converts the rotating motion into a linear motion. The molten resin is injected into the mold cavity closed from the tip of the injection nozzle.

  As related to the above-described prior art, Patent Document 1 discloses an injection molding machine that drives a plurality of belts around a pulley provided on a rotating shaft portion of a motor to synchronize the rotation of the belts. Is disclosed.

JP 2004-299330 A

  However, in a conventional injection molding machine as disclosed in Patent Document 1, a plurality of belts are wound around a rotating shaft portion provided in a cantilever manner with respect to a motor body. The load applied to the shaft will increase. For this reason, the rotating shaft portion may be deformed by being bent.

  The present invention has been made in view of the above problems, and even when a relatively large load is applied to the rotating shaft portion of the driving motor, the rotating shaft portion can be prevented from being deformed. An object is to provide a molding machine.

The invention related to this molding machine
A molding machine comprising: a drive motor comprising a drive motor main body and a rotary shaft portion rotatably supported by the drive motor main body; and a pulley rotated together with the rotary shaft portion,
A detachable housing mounted on the outside of the drive motor main body, and a bearing provided on the housing and supporting the rotating shaft portion ;
The bearing comprises an outer ring, a rolling element, and an inner ring in order from the outside to the inside,
Inside the inner ring, a cylindrical bearing sleeve is provided integrally with the inner ring, and a first pulley is fixed to the bearing sleeve by a first fixing means,
Furthermore, the first pulley fixed to the bearing sleeve by the first fixing means is disposed in the housing .

The invention related to this molding machine
The front end side of the rotary shaft portion protrudes from the outside of the bearing sleeve, and a second pulley is fixed to the front end side of the rotary shaft portion by a second fixing means.

The invention related to this molding machine
The housing is provided with an opening through which the drive transmission belt wound around the first pulley can enter and exit.

The invention related to this molding machine
A vent hole for radiating heat in the housing is formed in the housing.

The invention related to this molding machine
Position adjustment means capable of adjusting the position where the housing is mounted with respect to the drive motor main body is provided.

  According to the invention of the present molding machine, since the rotation shaft portion of the drive motor is supported by the bearing provided in the housing, even if a relatively large load is applied to the rotation shaft portion, the rotation shaft portion It can suppress that a part deform | transforms by a curve etc. Therefore, failure of the drive motor can be prevented, and the life of the drive motor can be extended.

  In addition, when the load is applied, the rotation shaft portion is prevented from being misaligned by the bearing, so when the pulley around which the drive transmission belt or the like is wound is rotated together with the rotation shaft portion, It is possible to prevent the tension balance of the drive transmission belt from being lost due to the drive transmission belt shaking. Therefore, it is possible to prevent the drive transmission belt from being broken due to the loss of tension balance.

  Furthermore, since the ventilation hole is formed in the housing, it is possible to prevent the inside of the housing from being heated when the rotating shaft portion of the driving motor is driven with the operation of the molding machine. Therefore, it is possible to prevent the first pulley that is rotated together with the rotating shaft portion in the housing, the drive transmission belt that is wound around the first pulley, and the like from being heated and deteriorated.

It is a front view which shows the injection unit comprised in an injection molding machine. It is a perspective view which shows the state which looked at the principal part of the injection unit from the upper side. It is a perspective view which shows the state which looked at the principal part of the injection unit from the lower side. It is sectional drawing which shows the drive motor comprised by the injection unit.

  Embodiments for carrying out the present invention will be described below with reference to FIGS. Of course, it goes without saying that the present invention can be easily applied to configurations other than those described in the embodiments without departing from the spirit of the invention.

  The injection molding machine according to the present embodiment is roughly divided into an injection unit 1 and a mold clamping unit (not shown). The mold clamping unit includes a movable die plate to which the movable mold is fixed, a fixed die plate to which the fixed mold is fixed, and a movable die plate that moves forward and backward relative to the fixed die plate. A toggle link mechanism for opening and closing the mold is provided.

  As shown in FIGS. 1 to 3, the injection unit 1 includes two injection drive motors 2 as drive sources. These injection driving motors 2 are fixed in parallel to the fixed frame 3 by fixing means such as screws.

  As shown in FIG. 4, the injection drive motor 2 is roughly divided into an injection drive motor main body 4 and a rotary shaft portion 5 that is rotatably supported by the injection drive motor main body 4. . A first pulley 6 that rotates together with the rotation shaft portion 5 is provided on the proximal end side of the rotation shaft portion 5 of the injection drive motor 2. On the other hand, a second pulley 7 that rotates together with the rotating shaft portion 5 is provided on the distal end side of the rotating shaft portion 5 of the injection driving motor 2.

  As shown in FIGS. 1 to 3, a drive transmission pulley 10 is provided below each of the two right and left injection driving motors 2. The drive transmission pulley 10 provided corresponding to each of the injection drive motors 2 is driven when the molten resin is injected and filled into the mold cavity. A drive transmission belt 11 is wound around the first pulley 6 and the drive transmission pulley 10.

  One synchronizing belt 12 is wound around the two left and right second pulleys 7 provided in each of the left and right two injection driving motors 2, thereby driving the two injection driving motors 2. Can be synchronized. The fixed frame 3 is provided with two upper and lower tension idlers 13, and when the tension idler 13 presses the synchronization belt 12, a predetermined tension is applied to the synchronization belt 12.

  Here, the configuration of the injection driving motor 2 will be further described with reference to FIG. A motor mounting plate 14 is configured in the injection driving motor 2 including the injection driving motor main body 4 and the rotary shaft portion 5 rotatably supported by the injection driving motor main body 4. A detachable housing 15 is fitted and attached to the motor mounting plate 14 of the injection driving motor main body 2. The housing 15 is arranged so as to be concentric with the rotating shaft portion 5. A first pulley 6 is disposed in the housing 15.

  The housing 15 is integrally provided with a bearing 16. The bearing 16 includes an outer ring 17, a rolling element 18, and an inner ring 19 in order from the outside to the inside. Inside the inner ring 19, a cylindrical bearing sleeve 20 is provided integrally with the inner ring 19.

  The rotating shaft portion 5 is inserted into the bearing sleeve 20, so that the rotating shaft portion 5 is rotatably supported by the bearing 16 via the bearing sleeve 20.

  A first pulley 6 inserted through the rotary shaft portion 5 is fixed to the bearing sleeve 20 by a bolt 25 serving as a first fixing means. And the 1st pulley 6 is being fixed to the rotating shaft part 5 with the 1st friction type fastener 21 which is a 3rd fixing means.

  Further, the distal end side of the rotating shaft portion 5 protrudes outside the bearing sleeve 20 provided in the housing 15. And the 2nd pulley 7 is being fixed to the rotating shaft part 5 by the 2nd friction type fastener 22 which is a 2nd fixing means at the front end side of the rotating shaft part 5. FIG.

  A vent hole 23 for radiating heat in the housing 15 is formed above the housing 15. On the other hand, an opening 24 is formed below the housing 15 through which the drive transmission belt 11 can go in and out of the housing 15 when the drive transmission belt 11 wound around the first pulley 6 is driven. ing.

  As described above, since the rotary shaft portion 5 of the injection drive motor 2 is supported by the bearing 16 provided in the housing 15, the rotary shaft portion is provided even if a relatively large load is applied to the rotary shaft portion 5. It can suppress that 5 deform | transforms by curvature etc. Therefore, failure of the injection drive motor 2 can be prevented, and as a result, the life of the injection drive motor 2 can be extended.

  In addition, the rotating shaft 5 that is rotatably supported in a cantilevered manner by the injection driving motor body 4 is restrained from being misaligned by the bearing 16 when a load is applied. When the first pulley 6 that is wound around the drive transmission belt 11 and the like together with the rotating shaft portion 5 is rotated, the tension balance of the drive transmission belt 11 is lost due to the drive transmission belt 11 being shaken. Can be prevented. Therefore, it is possible to prevent the drive transmission belt 11 from being broken due to the loss of tension balance.

  Furthermore, since the ventilation hole 23 is formed in the housing 15 above, when the rotary shaft part 5 of the injection driving motor 2 is driven in accordance with the operation of the injection molding machine, the inside of the housing 15 is heated. Can be prevented. Therefore, it is possible to prevent the first pulley 6 and the drive transmission belt 11 wound around the first pulley 6 and the like, which are provided in the housing 15 and rotated together with the rotating shaft portion 5, from being heated and deteriorated. Can do.

  Further, the bearing 16 of the present embodiment is provided integrally with a housing 15 that is directly mounted on the injection driving motor body 4. Therefore, even if replacement occurs due to a failure of the injection drive motor 2, the drive motor 2 that can suppress the deformation of the rotating shaft portion 5 can be easily replaced. That is, for example, when the bearing 16 that supports the rotating shaft portion 5 is provided not in the housing 15 directly attached to the injection drive motor main body 4 but in other parts or the like, the injection drive motor is In the case of replacement due to failure or the like, it is necessary to finely adjust the positional relationship between the rotating shaft portion and the bearing, but such complicated work can be eliminated.

  As mentioned above, although an example of this embodiment was explained in full detail, this invention is not limited to the said embodiment, A various deformation | transformation implementation is possible within the range of the summary of this invention. In the example of the present invention, it has been described that the housing 15 is attached by being fitted to the injection driving motor main body 4. However, as a method of attaching the housing 15 to the injection driving motor main body 4, a bolt may be used. It may be attached with a stop or the like. In that case, a hole through which the bolt is inserted is formed in the housing 15, but the hole is formed as a long hole, and the long hole is used as a position adjusting means to the housing for the injection driving motor main body 4. Position adjustment for mounting 15 may be performed. In that case, it is possible to easily adjust the position of the bearing 16 and the bearing sleeve 20 with respect to the rotating shaft portion 5. Moreover, the bearing 16 which supports the rotating shaft part 5 is not restricted to one as shown in FIG.

1 Injection unit 2 Injection drive motor (drive motor)
3 Fixed frame 4 Injection drive motor body (drive motor body)
DESCRIPTION OF SYMBOLS 5 Rotating shaft part 6 1st pulley 7 2nd pulley 10 Drive transmission pulley 11 Drive transmission belt 12 Synchronization belt 13 Tension idler 14 Motor mounting plate 15 Housing 16 Bearing 17 Outer ring 18 Rolling element 19 Inner ring 20 Bearing sleeve 21 First friction type fastener (third fixing means)
22 2nd friction type fastener (2nd fixing means)
23 Vent 23
24 Opening 24
25 bolts (first fixing means)

Claims (5)

A molding machine comprising: a drive motor comprising a drive motor main body and a rotary shaft portion rotatably supported by the drive motor main body; and a pulley rotated together with the rotary shaft portion,
A detachable housing mounted on the outside of the drive motor main body, and a bearing provided on the housing and supporting the rotating shaft portion ;
The bearing comprises an outer ring, a rolling element, and an inner ring in order from the outside to the inside,
Inside the inner ring, a cylindrical bearing sleeve is provided integrally with the inner ring, and a first pulley is fixed to the bearing sleeve by a first fixing means,
A molding machine , wherein the first pulley fixed to the bearing sleeve by the first fixing means is disposed in the housing . The front end side of the rotary shaft portion is projected from the outside of the bearing sleeve, and the front end side of the rotary shaft portion is
The molding machine according to claim 1 , wherein the second pulley is fixed by a second fixing means. Said housing molding machine according to claim 1 or 2, wherein the first multiplying around a drive transmission belt to the pulley, characterized in that the out opening sections in and out is provided. The molding machine according to claim 3 , wherein a vent hole for radiating heat in the housing is formed in the housing. Molding machine according to any one of claims 1-4, characterized in that it comprises a position adjusting means capable of adjusting the position of mounting the housing to the driving motor body.

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