JP2005081677A - Vertical injection molding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vertical injection molding machine capable of performing the cleaning, maintenance or the like of a lower mold safely and easily. <P>SOLUTION: The vertical injection molding machine 10 is equipped with shuttle trucks 41 and 42 horizontally movable between a molding station 20 and programming stations 21 and 22. A first upper mold 32 and a first lower mold 33 are provided to one shuttle truck 41, and a second upper mold 36 and a second lower mold 37 are provided to the other shuttle truck 42. The lower mold holder 70 of the first shuttle truck 41 is erected along with the lower mold 33 by a first revolving mechanism 75 while the lower mold holder 90 of the second shuttle truck 42 is erected along with the lower mold 37 by a second revolving mechanism 92. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vertical injection molding machine suitable for, for example, insert molding.

In order to avoid stopping the injection operation when repairing or exchanging molds, an extraction station is provided on both sides of the molding station so that a plurality of molds can move between the extraction station and the molding station. A die casting apparatus has been proposed. (For example, see Patent Document 1 below)
In this type of mold casting apparatus, the upper mold is usually fixed to a movable mold opening / closing movable plate by a clamp mechanism, and the lower mold is fixed to the fixed platen. When taking out the product after injection, the upper die is moved upward by the raising / lowering drive unit integrally with the mold opening / closing movable platen at the take-out station.

In addition, an injection molding machine has been proposed in which the mold mounting operation can be performed safely and easily. In this conventional example, the upper upper mold mounting plate rotates so that the mold can be taken out from the upper opening. (For example, see Patent Document 2 below)
JP 2002-254152 A Utility Model Registration No. 2528647

  In a conventional vertical injection molding machine, when checking the mold or performing maintenance on the mold at the take-out station, the upper mold is lifted by the lifting / lowering drive unit, and between the upper mold and the lower mold. An operator puts a part of the body into the space formed in the work. For this reason, it is difficult to work and is dangerous.

  Further, in an injection molding machine that inserts and molds glass, the glass may be broken by contact between the glass and the mold or pressure during molding. When the glass is broken in the vertical injection molding machine, it takes time because the fragments in the mold are conventionally removed with a brush or a vacuum cleaner. In addition, debris tends to remain on the inner surface of the mold (particularly the lower mold). If foreign matter such as broken pieces remains in the mold, it not only causes molding defects but also causes glass to break again in the next production.

  Accordingly, an object of the present invention is to provide a vertical injection molding machine that can safely and efficiently perform the removal of foreign matters in the lower mold, the maintenance work of the lower mold, and the like.

  A vertical injection molding machine of the present invention based on the first aspect includes a molding station provided with a clamping device, a setup station located on the side of the molding station, and between the molding station and the setup station. A shuttle carriage that can move the upper and lower molds, a drive mechanism that moves the shuttle carriage between the molding station and the setup station, and holds the lower mold on the shuttle carriage; A lower mold holder that is rotatable between a horizontal attitude and an upright attitude; and a rotation mechanism that moves the lower mold holder between the horizontal attitude and the upright attitude at the setup station.

  In the present invention, when performing maintenance or the like of the lower mold provided in the shuttle carriage, the shuttle carriage is moved to the setup station, and the lower mold is erected by the rotating mechanism, so that the lower mold molding surface is operated. Can be directed toward the person.

  The vertical injection molding machine of the present invention based on the second aspect includes a molding station provided with a mold clamping device, a first setup station located on the side of the molding station, the molding station, and the first A first shuttle carriage that is movable between the first and second lower molds and the first shuttle carriage between the molding station and the first setup station. A first drive mechanism to be moved; a first lower mold holder that holds the lower mold on the first shuttle carriage and is rotatable between a horizontal posture and a standing posture; and the first setup A first rotation mechanism for moving the first lower mold holder between the horizontal posture and the standing posture at the station; and the first setup step with the molding station interposed therebetween. A second set-up station located on the opposite side of the station, a second shuttle carriage movable between the forming station and the second set-up station and carrying a second upper mold and a lower mold; A second drive mechanism for moving the second shuttle carriage between the molding station and the second setup station; and holding the lower mold on the second shuttle carriage and maintaining a horizontal posture and standing A second lower mold holder that can be rotated over a predetermined position, and a second rotation mechanism that moves the second lower mold holder between the horizontal position and an upright position in the second setup station. Are provided.

  In the present invention, the first upper mold and the lower mold provided on the first shuttle carriage move between the molding station and the first setup station. Further, when the second upper mold and the lower mold provided in the second shuttle carriage move between the molding station and the second setup station, injection molding is performed using these molds. .

  When performing maintenance or the like of the first lower mold, the first shuttle carriage is moved to the first setup station, and the first lower mold is erected by the first rotation mechanism. The molding surface is directed toward the operator. When performing maintenance or the like of the second lower mold, the second shuttle carriage is moved to the second setup station, and the second lower mold is erected by the second rotation mechanism, thereby lowering the lower mold. Direct the molding surface of the worker.

  The vertical injection molding machine of the present invention is suitable for insert molding, but can also be used for products other than insert molded products. Also, it can be applied to injection molding machines for synthetic resin products, and it can be applied to injection molding machines for elastic products such as rubber (including synthetic rubber including silicon rubber and natural rubber) or elastomer. You can also. Alternatively, it can be applied to an injection molding machine for metal products such as aluminum die casting.

  According to the first aspect of the present invention, the lower mold is erected at the set-up station, so that foreign matter removal and maintenance work in the lower mold can be performed between the upper mold and the lower mold at the set-up station. It can be done safely and easily from the side without any part.

  According to the invention described in claim 2, in addition to the effect of claim 1, two shuttle carriages and a mold that can move independently between the molding station and the first and second setup stations are used. Injection molding can be performed efficiently, and even if the mold on one shuttle carriage is under maintenance, the other shuttle carriage can be moved and injection molding can be performed using the mold on this shuttle carriage. it can.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
A vertical injection molding machine 10 shown in FIG. 1 is provided on a base 11 with a mold clamping device 12, an injection device 15 including a barrel 13, a hopper 14, and the like. The injection device 15 can be moved in the arrow A direction along a guide member (not shown) by a linear drive source such as a motor or a cylinder. A nozzle 16 is formed at the tip of the barrel 13.

  As shown in FIG. 4, the mold clamping device 12 is provided in the molding station 20. A first setup station 21 and a second setup station 22 are provided on both the left and right sides of the molding station 20. The second setup station 22 is located on the opposite side of the first setup station 21 across the molding station 20.

  The mold clamping device 12 includes a frame 25 fixed to the base 11 and a mold clamping frame 26 that can be raised and lowered with respect to the frame 25. The mold clamping frame 26 is driven up and down by a drive source 27 such as a hydraulic cylinder. When the mold clamping frame 26 is lowered, the first mold set 31 (or the second mold set 35) is vertically moved between the mold clamping frame 26 and the fixed frame 28. It is designed to clamp.

  An example of the first mold set 31 includes an upper mold 32 and a lower mold 33 for insert molding. The second mold set 35 also includes an upper mold 36 and a lower mold 37 for insert molding.

  As shown in FIG. 4 and the like, a first shuttle carriage 41 and a second shuttle carriage 42 are provided on a guide rail 40 extending in the horizontal direction. The shuttle carriages 41 and 42 can move independently in the horizontal direction by rollers 45 and 46 that are in rolling contact with the guide rail 40, respectively. 2 and 3 show the first shuttle carriage 41.

  The first shuttle carriage 41 reciprocates along the guide rail 40 between the molding station 20 and the first setup station 21 by the rod member 51a of the first drive mechanism 51 using, for example, a cylinder mechanism. It has become.

  The second shuttle carriage 42 reciprocates along the guide rail 40 between the molding station 20 and the second setup station 22 by the rod member 52a of the second drive mechanism 52 using, for example, a cylinder mechanism. It has become. These drive mechanisms 51 and 52 are not limited to fluid pressure cylinders, and may be a ball screw mechanism or a gear mechanism driven by a motor.

  As shown in FIG. 2, the first shuttle carriage 41 is provided with a first mold opening / closing mechanism 61. The first mold opening / closing mechanism 61 includes a frame member 62 that is movable in the vertical direction. The frame member 62 is driven in the vertical direction across the first position P1 and the second position P2 shown in FIG. The upper mold 32 of the first mold set 31 is fixed to the lower surface of the frame member 62 by a clamp mechanism 64.

  An example of the lifting / lowering actuator 63 is a fluid pressure cylinder having a rod member 63a that moves in the vertical direction, but a ball screw mechanism or a gear mechanism driven by a motor may be used.

  The lower mold 33 is fixed to the lower mold holder 70 provided on the first shuttle carriage 41 by the clamp mechanism 71. The lower mold holder 70 can rotate from the horizontal posture shown in FIG. 2 to the upright posture shown in FIG.

  The first shuttle carriage 41 is provided with a first rotation mechanism 75 that rotates the lower mold holder 70 between a horizontal posture and an upright posture. This rotation mechanism 75 has a drive source 76 using, for example, a fluid pressure cylinder, and has a posture in which the lower die 33 is horizontal (lateral position shown in FIG. 2) and a posture in which the lower die 33 stands up (see FIG. 3). The vertical holder 70 has a function of rotating the lower holder 70 in the vertical direction by about 90 °.

  An example of the drive source 76 is a fluid pressure cylinder including a rod portion 76a that reciprocates in a substantially horizontal direction. However, a ball screw mechanism or a gear mechanism driven by a motor may be used. The distal end portion of the rod portion 76 a is connected to the lower mold holder 70 via a link 77. The drive source 76 is supported by the frame 41 a of the shuttle carriage 41 via the support portion 78.

  The first shuttle carriage 41, the mold opening / closing mechanism 61, the lifting / lowering actuator 63, the lower mold holder 70, the clamp mechanisms 64 and 71, the rotation mechanism 75, and the like described above can be moved in the horizontal direction. One shuttle unit is configured.

  The second shuttle carriage 42 is configured in the same manner as the first shuttle carriage 41. The second shuttle carriage 42 includes a second mold opening / closing mechanism 82. The second mold opening / closing mechanism 82 includes a frame member 83 that is movable in the vertical direction. The frame member 83 is driven in the vertical direction across the first position P1 and the second position P2 shown in FIG. The upper mold 36 of the second mold set 35 is fixed to the lower surface of the frame member 83 by a clamp mechanism 85.

  An example of the lifting actuator 84 is a fluid pressure cylinder having a rod member 84a that moves in the vertical direction, but a ball screw mechanism or a gear mechanism driven by a motor may be used.

  The lower die 37 is fixed to the lower die holder 90 provided on the second shuttle carriage 42 by the clamp mechanism 91. The lower mold holder 90 can rotate from a horizontal attitude to an upright attitude, similarly to the lower mold holder 70 of the first shuttle carriage 41.

  The second shuttle carriage 42 is provided with a second rotation mechanism 92 that rotates the lower mold holder 90 between a horizontal posture and an upright posture. The rotation mechanism 92 is configured in the same manner as the first rotation mechanism 75, and the lower mold holder 90 is moved vertically by 90 ° between the attitude in which the lower mold 37 is horizontal and the attitude in which the lower mold 37 stands. It is responsible for the ability to rotate to a certain extent.

  The second shuttle carriage 42, the mold opening / closing mechanism 82, the lifting / lowering actuator 84, the lower mold holder 90, the clamp mechanisms 85 and 91, the rotation mechanism 92, and the like described above can be moved in the horizontal direction. Two shuttle units are configured.

Next, the operation of the vertical injection molding machine 10 configured as described above will be described.
As shown in FIG. 4, in the molding station 20, the upper mold 32 and the lower mold 33 of the first mold set 31 are clamped in the vertical direction by the mold clamping device 12, and by the injection device 15 (shown in FIG. 1). Then, an injection molding material such as resin is injected into the upper mold 32 and the lower mold 33.

  At this time, the second mold set 35 is located at the second setup station 22. In the second setup station 22, the frame member 83 is raised to the second position P <b> 2 by the lifting / lowering actuator 84 of the die opening / closing mechanism 82, so that the upper die 36 fixed to the frame member 83 is also raised.

  In this manner, the insert part W1 is set at a predetermined position of the lower mold 37 while the upper mold 36 is raised at the second setup station 22. After that, as shown in FIG. 5, the frame member 83 is lowered to the first position P1 by the lifting actuator 84, and the upper die 36 is lowered, so that the upper die 36 is placed on the lower die 37 and waits at that position. To do.

  As shown in FIG. 5, at the molding station 20, the mold clamping frame 26 is raised by the mold clamping stroke ST, and the first mold set 31 is in an unclamped state. After that, as shown in FIG. 6, the first shuttle carriage 41 is moved to the first setup station 21 by the first drive mechanism 51, so that the first mold set 31 is also in the first setup. Move to station 21.

  At the same time, the second shuttle carriage 42 is moved to the molding station 20 by the second drive mechanism 52, so that the second mold set 35 on the second shuttle carriage 42 is also moved to the molding station 20.

  Thereafter, the upper mold 36 and the lower mold 37 of the second mold set 35 are clamped in the vertical direction by the mold clamping device 12 of the molding station 20, and further, the material inside the upper mold 36 and the lower mold 37 is injected by the injection device 15. Is ejected.

  By repeating the series of operations described above alternately at the first setup station 21 and the second setup station 22, insert molding can be performed efficiently using the two mold sets 31, 35. , Cycle time can be shortened.

  When it is necessary to clean the lower mold 33 because the glass parts inserted into the first mold set 31 are damaged, or when the maintenance of the lower mold 33 is performed, the first shuttle carriage 41 is used. Are moved to the first setup station 21. Then, as shown in FIG. 2, the upper mold 32 is raised to the raised position P <b> 2 by the lifting / lowering actuator 63.

  After that, as shown in FIG. 3, the lower mold holder 70 and the lower mold 33 are moved to the vertical position around the shaft 72 by driving the rod portion 76 a of the drive source 76 of the first rotation mechanism 75 to the extension side. Stand up.

  Since the lower mold 33 is in the vertical position and the molding surface (cavity) of the lower mold 33 faces the operator, operations such as cleaning or maintenance of the lower mold 33 can be performed from the side of the setup station 21. Work can be done safely and easily. After the work is completed, the lower mold holder 70 and the lower mold 33 are returned to the horizontal positions shown in FIG. 2 by driving the rod portion 76a of the drive source 76 of the rotation mechanism 75 to the contraction side.

  When the second lower mold 37 is cleaned or maintained, the second shuttle carriage 42 is moved to the second setup station 22. Then, the upper die 36 is raised to the raising position P2 by the lifting actuator 84, and then the lower die 37 is raised to the vertical position by the second rotating mechanism 92, so that the molding surface of the lower die 37 is made to the operator. Turn. After the work is completed, the lower mold 37 is returned to a horizontal posture by the rotation mechanism 92.

  As described above, according to the present embodiment, for example, when an insert part such as glass is cracked, the lower molds 33 and 37 are erected in a substantially vertical posture in order to remove fragments remaining in the lower molds 33 and 37. Therefore, it can be performed safely and efficiently in the setup stations 21 and 22.

  Further, since each shuttle carriage 41 and 42 can move independently between the stations 20, 21, and 22, even if the mold on one shuttle carriage is under cleaning or maintenance, the other shuttle carriage The carriage can be moved and injection molding can be performed using the mold on the shuttle carriage.

  In carrying out the present invention, the constituent elements of the present invention such as a shuttle carriage, a drive mechanism, a lower mold holder, and a rotation mechanism, as well as a molding station and a setup station, are variously modified without departing from the gist of the present invention. Needless to say, this can be done.

The side view of the vertical type injection molding machine which shows one Embodiment of this invention. The side view which shows the 1st shuttle trolley and die set of the vertical injection molding machine shown by FIG. FIG. 3 is a side view of a state in which a lower mold on the shuttle carriage shown in FIG. 2 is raised. FIG. 3 is a front view showing a state where the upper mold of the first mold set is closed and the upper mold of the second mold set is opened in the vertical injection molding machine shown in FIG. 1. The front view of the state which the upper mold | type of the 2nd metal mold | set set closed in the vertical type injection molding machine shown by FIG. The front view of the state which the 1st shuttle trolley moved to the 1st setup station in the vertical injection molding machine shown by FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Vertical injection molding machine 12 ... Clamping apparatus 20 ... Molding station 21 ... 1st setup station 22 ... 2nd setup station 31 ... 1st metal mold set 35 ... 2nd metal mold set 41 ... 1st Shuttle carriage 42 ... second shuttle carriage 51 ... first drive mechanism 52 ... second drive mechanism 70 ... first lower mold holder 75 ... first rotation mechanism 90 ... second lower mold holder 92 ... Second turning mechanism

Claims (2)

A molding station provided with a clamping device;
A setup station located on the side of the molding station;
A shuttle carriage that is movable between the molding station and the set-up station and has an upper mold and a lower mold mounted thereon;
A drive mechanism for moving the shuttle carriage between the molding station and the setup station;
A lower mold holder that holds the lower mold on the shuttle carriage and is rotatable between a horizontal posture and a standing posture;
A rotation mechanism for moving the lower mold holder between the horizontal posture and an upright posture at the setup station;
A vertical injection molding machine characterized by comprising: A molding station provided with a clamping device;
A first setup station located on the side of the molding station;
A first shuttle carriage movable between the molding station and the first setup station and carrying a first upper mold and a lower mold;
A first drive mechanism for moving the first shuttle carriage between the molding station and the first setup station;
A first lower mold holder that holds the lower mold on the first shuttle carriage and is rotatable between a horizontal posture and a standing posture;
A first rotating mechanism for moving the first lower mold holder between the horizontal posture and an upright posture at the first setup station;
A second setup station located on the opposite side of the first setup station across the molding station;
A second shuttle carriage movable between the molding station and the second setup station and carrying a second upper mold and a lower mold;
A second drive mechanism for moving the second shuttle carriage between the molding station and the second setup station;
A second lower mold holder that holds the lower mold on the second shuttle carriage and is rotatable between a horizontal posture and a standing posture;
A second rotating mechanism for moving the second lower mold holder between the horizontal posture and an upright posture at the second setup station;
A vertical injection molding machine characterized by comprising:

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