JP2009248388A - Molded article taking-out apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To take out a molded article to the outside of a molding machine in a satisfactory condition by avoiding interference, with the molding machine, of the molded article conveyed by the rotation of an operation arm. <P>SOLUTION: A molded article taking-out apparatus is provided in which the molded article 70 molded in the metallic die of the molding machine 10 is taken out to the outside of the molding machine by the operation arm 20 turnably supported on the molding machine 10. At the distal end of the operation arm 70, there is installed a chuck 28 capable of clamping the molding. The operation arm can be switched between an extended state in which a distance from the turning fulcrum to the chuck is extended and a contracted state in which the distance is reduced. The operation arm 20 is set so as to be switched to the contracted state when it is turned from the metallic die side to the outside of the molding machine 10 with the molded article clamped by the chuck. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a molded product take-out apparatus for taking out a molded product molded with a mold mainly in a molding machine for resin products.

As for this kind of take-out device, for example, the technique disclosed in Patent Document 1 is already known. In this technique, the base end portion of the swivel arm is turnable on the axis of the tie bar in the molding machine and is supported so as to be movable along the axis of the tie bar. A chuck capable of gripping is provided. The swivel arm is controlled to rotate or move by a drive mechanism such as a motor, and can hold a molded product molded by a mold with a chuck and take it out of the molding machine.
JP 2004-291337 A

  In the take-out device disclosed in Patent Document 1, when the molded product gripped by the chuck is carried by the rotation of the swivel arm, the turning radius of the swivel arm is increased by the amount of the molded product. May interfere with a part of Due to this interference, the design surface of the molded product may be scratched. As a result, in particular, a molded product for which a very thin metal film is planned to be applied to the design surface by metal vapor deposition (sputtering) is a defective product because even a slight scratch appears on the surface of the metal film.

  The present invention is intended to solve such problems, and its purpose is to prevent the molded product carried by the rotation of the operating arm from interfering with the molding machine side, and molding the molded product in a good state. Take it out of the machine.

The present invention is for achieving the above object, and is configured as follows.
A first aspect of the present invention is a take-out device of a type that takes out a molded product molded by a mold of the molding machine to the outside of the molding machine by an operating arm rotatably supported by the molding machine. A chuck capable of gripping a molded product is provided at the front end of the head. The operating arm can be switched to an extended state in which the distance between the rotation fulcrum and the chuck is increased, or a shortened state in which the distance is reduced. When the operating arm rotates from the mold side to the outside of the molding machine with the molded product held by the chuck, the operating arm is set to be switched to the shortened state.

  In this configuration, it is possible to avoid that the molded product conveyed by the rotation of the operating arm switched to the shortened state interferes with the tie bar of the molding machine. Thereby, the molded product can be taken out of the molding machine without scratches, and it is possible to cope with a case where a process of applying a very thin metal film by sputtering on the design surface of the molded product is planned.

According to a second invention, in the first invention, when the operating arm rotates outward of the molding machine and the molded product held by the chuck is moved to the next process, the operating arm is switched to the extended state. Is set to
Thereby, a molded article can be moved to the next process at a safe position away from the molding machine.

According to a third invention, in the first or second invention, when the molded product molded by the mold is gripped by the chuck, the operating arm is set to be switched to the extended state.
Thereby, the chuck can be moved to a position suitable for gripping the molded product on the mold side.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.
A molding machine 10 shown in FIG. 1 and FIG. 2 is for molding resin interior parts such as a center cluster for automobiles, for example, and a fixed die plate 14 and an upper surface of a frame 12 constituting the gantry. A movable die plate 15 is placed. The movable die plate 15 is guided by four tie bars 16 (FIG. 1) and is driven by hydraulic control or the like in a direction in which the movable die plate 15 approaches or separates from the fixed die plate 14. Further, a fixed mold 18 and a movable mold 19 are individually assembled on the opposing surfaces of both die plates 14 and 15. Accordingly, by driving the movable die plate 15 along each tie bar 16, the molds 18 and 19 for resin molding are clamped or opened. FIG. 2 shows the mold open state of the dies 18 and 19.

1 and 2 show the overall structure of the molded product take-out apparatus. The structure of this take-out device is such that an operating arm 20 capable of carrying a molded product 70 (FIGS. 9 to 14), which will be described later formed by the molds 18 and 19, to the outside of the molding machine 10, and the operating arm 20 And a drive mechanism 40 for driving the motor.
First, the configuration of the operating arm 20 will be described with reference to FIGS. 3 and 4 as well.
An annular (pipe-like) shaft support portion 22 is fixed to the base end portion of the operating arm 20. The shaft support portion 22 is supported on the shaft of a tie bar 16 </ b> A located at the lower portion of the tie bar 16 of the molding machine 10 on the side where the molded product 70 is taken out. The inner peripheral surface of the shaft support portion 22 and the outer peripheral surface of the tie bar 16A slide smoothly with each other via, for example, an oilless bush (not shown). As a result, the operating arm 20 can rotate about the axis of the tie bar 16A and can reciprocate along the axis of the tie bar 16A.

Near the distal end of the operating arm 20, a movable member 24 that is separate from the operating arm 20 and that constitutes the distal end portion of the operating arm 20 is provided. The movable member 24 is supported by a guide 26 so as to slide in the direction in which the length of the operating arm 20 is expanded and contracted. The movable member 24 is attached with a chuck base 29 having a chuck 28 described below. The chuck base 29 is positioned by an attachment pin 25 (FIG. 3) fixed to the movable member 24, and is attached to the movable member 24 by using a combination of bolts.
An air cylinder 30 used as a drive source for expansion and contraction is assembled to the operating arm 20, and the distal end portion of the operating rod 32 in the air cylinder 30 is connected to the movable member 24 by a joint 34. Therefore, by sliding the movable member 24 by driving control of the air cylinder 30, the shaft center of the shaft support portion 22 that becomes the rotation fulcrum of the operating arm 20, and the shaft center of the mounting pin 25 that positions the chuck base 29 The distance L (FIG. 3) can be expanded and contracted. That is, the operating arm 20 can be switched to an extended state in which the distance L is extended or a shortened state in which the distance L is reduced by driving control of the air cylinder 30. Note that the operating arm 20 in FIGS. 3 and 4 is shown in an extended state.

The chuck 28 and the chuck base 29 are configured to correspond to the size and shape of the molded product 70 (FIGS. 9 to 14), and the chuck base 29 can be detached from the movable member 24 of the operating arm 20. is there. Thereby, the chuck 28 and the chuck base 29 can be exchanged according to the type of the molded product 70.
The chuck 28 is provided at a plurality of locations on the chuck base 29. Each chuck 28 has a known configuration capable of gripping an object or releasing the grip by controlling supply of air pressure to the chuck 28. In addition, in the molded product 70 shown in FIGS. 9-14, with the resin remaining in the several resin supply path (illustration omitted) in the fixed metal mold | die 18 and the part outside a product finally cut | disconnected as a scrap, A part of the product is set to be gripped by each chuck 28.

Next, the drive mechanism 40 of the operating arm 20 will be described with reference to FIGS.
In the molding machine 10, a support base 44 is supported by a support bracket 42 on the frame 12 on the side where the molded product 70 is taken out. The support base 44 is set in a rectangular plate shape having a long side in a direction parallel to the axis of the tie bar 16 (FIG. 6). On one side of the short side of the support base 44 (the left side in FIGS. 5 and 6), a servo motor 46 used as a drive source for applying a reciprocating force to the operating arm 20 is assembled. In addition, a ball screw 48 disposed in parallel with the axis of the tie bar 16 is supported on the support base 44 so as to be able to rotate around the axis. One end of the ball screw 48 and the drive shaft of the servo motor 46 are coupled by a joint 47, and a moving body 49 (ball screw nut) is provided on the shaft of the ball screw 48.
When the ball screw 48 rotates about its axis by driving the servo motor 46, the moving body 49 moves in a direction parallel to the axis of the tie bar 16 in conjunction with this. The moving direction and moving speed of the moving body 49 can be switched by controlling the rotation driving direction and the rotating speed of the servo motor 46.

The slide base 50 is integrally assembled on the upper surface of the moving body 49 so as to move together with the moving body 49. The slide base 50 has a pair of left and right side plates 51 that are close to the outer periphery of the tie bar 16A so as to sandwich the shaft support portion 22 of the operating arm 20 from both ends (FIGS. 1 and 2). Therefore, when the moving body 49 is reciprocated together with the slide base 50, the operating arm 20 reciprocates on the axis of the tie bar 16A along with the slide base 50.
A cylinder bracket 52 and a receiving bracket 54 are respectively fixed inside the side plate 51 on one side (left side in FIG. 2) of the slide base 50. An air cylinder 60 is attached to the cylinder bracket 52 as a drive source for supplying rotational force to the operating arm 20. Further, shock absorbers 56 and 57 are attached to the receiving bracket 54 in opposite directions at opposite positions (FIG. 1).

As is apparent from FIGS. 7 and 8 showing the mounting state of the air cylinder 60, the air cylinder 60 is supported with respect to the cylinder bracket 52 by a support shaft 53 with a bush so as to be rotatable within a certain angle range. Has been. On the other hand, a connecting bracket 23 protruding outward is fixed to the outer periphery of the shaft support portion 22 in the operating arm 20, and an operating rod 62 of the air cylinder 60 is connected to the connecting bracket 23 by a knuckle joint 64. Accordingly, the operation arm 20 is rotated about the axis of the tie bar 16 </ b> A through the connection bracket 23 by the operation of the operation rod 62 accompanying the drive control of the air cylinder 60.
The pair of shock absorbers 56 and 57 are for restricting the amount of rotation of the operating arm 20 about the axis of the tie bar 16A. When the operating arm 20 rotates counterclockwise in FIG. 2, one shock absorber 56 receives the operating arm 20 itself. On the contrary, when the operating arm 20 rotates in the clockwise direction in FIG. 1, the other shock absorber 57 receives the connection bracket 23 positioned on the outer periphery of the shaft support portion 22.

Next, the operation of taking out the molded product 70 molded by the molds 18 and 19 of the molding machine 10 to the outside of the molding machine 10 by the take-out device will be mainly described with reference to FIGS.
The operating arm 20 shown in FIGS. 9 and 10 rotates most outward (counterclockwise direction) of the molding machine 10 around the axis of the tie bar 16A. Further, the operating arm 20 in this state is in a shortened state in which the distance L shown in FIG. 3 is shortened by sliding the movable member 24 toward the axis of the tie bar 16A by the drive control of the air cylinder 30. The operating arm 20 at this time is received by one shock absorber 56 as described above.
In the molding machine 10 that has finished the molding process, the movable die plate 15 is driven along each tie bar 16, whereby the movable die 19 is separated from the fixed die 18 and the mold is opened. In synchronism with this, the air cylinder 60 is driven and controlled, and the operating rod 62 is operated in the direction of drawing from the state shown in FIGS. In conjunction with this, the operating arm 20 rotates in the clockwise direction of FIG. 9 around the axis of the tie bar 16A in the shortened state.

The operating arm 20 rotates from the state of FIG. 9 to the state of entering between the molds 18 and 19 through the rotation position shown in FIG. At this time, the connection bracket 23 positioned on the outer periphery of the shaft support portion 22 in the operating arm 20 is received by the shock absorber 57. Thereafter, the air cylinder 30 is driven and controlled to slide the movable member 24 away from the axis of the tie bar 16A, whereby the operating arm 20 is switched to the extended state in which the distance L in FIG. Thus, the chucks 28 of the chuck base 29 attached to the movable member 24 are positioned so as to face each other so that the molded product 70 held on the mold surface of the movable mold 19 can be gripped.
In synchronization with the ejection of the molded product 70 from the mold surface by the ejecting operation of the movable mold 19, the servo motor 46 of the driving mechanism 40 is driven and controlled, and the slide base 50 moves the operating arm 20 along the axis of the tie bar 16A. It is moved toward the movable mold 19, that is, toward the molded product 70. Here, a part outside the product of the molded product 70 and a part of the product are gripped by each chuck 28, and then the servo motor 46 is driven and controlled in the reverse rotation direction, and the slide base 50 moves the operating arm 20 of the tie bar 16A. Move to the original position along the axis. This state is shown in FIG. 11 and FIG.

11 and 12, the molded product 70 held by each chuck 28 remains at a height separated from the mold surface of the movable mold 19. When the operating arm 20 is rotated to take out the molded product 70 of this height from between the molds 18 and 19 to the outside of the molding machine 10, the tie bar 16 and the molded product 70 positioned immediately above the tie bar 16A May interfere.
Therefore, after the operation arm 20 is switched to the shortened state by the drive control of the air cylinder 30, the operation rod 62 is operated in the pushing direction from the state shown in FIGS. 11 and 12 by the drive control of the air cylinder 60. In conjunction with this, the operating arm 20 rotates together with the molded product 70 in the counterclockwise direction of FIG. 11 around the axis of the tie bar 16A. As a result, as shown in FIGS. 13 and 14, the molded product 70 passes with a sufficient distance from the tie bar 16 positioned directly above the tie bar 16 </ b> A, and is indicated by an imaginary line in FIGS. 9 and 10. Thus, it is taken out of the molding machine 10.

Depending on the type of the molded product 70, there may be a case where a finishing process for applying a metal film to the design surface by metal deposition (sputtering) is scheduled. Since the film thickness of the metal film by sputtering is as very thin as 2 to 3 microns, even if there is a slight scratch on the design surface of the molded product 70, it appears on the surface of the metal film. For this reason, it is required to carefully take out the molded product 70 formed by the molds 18 and 19 to the outside of the molding machine 10, but the take-out device in the present embodiment is sufficiently sufficient for such a demand. Can respond.
Although the operating arm 20 for taking out the molded product 70 is supported on the axis of the tie bar 16A, the drive mechanism 40 for applying a driving force to the operating arm 20 is supported by the frame 12 of the molding machine 10. That is, the weight of the operating arm 20 and the drive mechanism 40 is shared by the tie bar 16A and the frame 12, and even when the weight increases, the increase in the weight applied to the tie bar 16A is suppressed, and the distortion of the tie bar 16A is avoided. be able to.

The molded product 70 taken out of the molding machine 10 is released from the gripping by the chucks 28 and moved to the next process. When the molded product 70 is transferred, the molded product 70 can be moved to a safe position away from the molding machine 10 by switching the operating arm 20 to the extended state by driving control of the air cylinder 30. Similarly, when the molded product 70 is transferred, the operating arm 20 is moved along with the molded product 70 along the axis of the tie bar 16A in the direction of the movable mold 19 (right direction in FIG. 10) by the drive control of the servo motor 46. At that position, the molded product 70 can be transferred to the next process.
In the present embodiment, the example in which the shaft support portion 22 of the operating arm 20 is supported on the axis of the tie bar 16A in the molding machine 10 is described. However, the present invention is not limited to this configuration. It is also possible to support the shaft support 22 on a rod fixed to the frame 12.

The side view which represented the whole structure of the molded article extraction apparatus with a part of molding machine. The front view of FIG. The side view showing the action | operation arm of the molded article extraction apparatus. FIG. 4 is a front view of FIG. 3. The front view showing the drive mechanism of the action | operation arm of a molded article extraction apparatus. FIG. 6 is a plan view of FIG. 5. The side view showing the mounting state of the air cylinder which gives rotational force to an action arm. The front view of FIG. The side view showing the molded product taking-out apparatus in a state where the operating arm is waiting outside the molding machine. The front view of FIG. The side view showing the molded product taking-out apparatus in the state which the operation | movement arm approached between the metal mold | dies and is holding the molded product. The front view of FIG. The side view showing the molded product taking-out apparatus in the middle of the operation | movement arm taking out a molded product to the outward of a metal mold | die. FIG. 14 is a front view of FIG. 13.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Molding machine 18, 19 Mold 20 Actuating arm 28 Chuck 40 Drive mechanism 70 Molded product

Claims (3)

A take-out device of a type that takes out a molded product molded by a mold of the molding machine to the outside of the molding machine by an operating arm rotatably supported by the molding machine,
A chuck capable of gripping the molded product is provided at the tip of the operating arm.
The operating arm can be switched to an extended state in which the distance between the rotation fulcrum and the chuck is extended, or a shortened state in which the distance is reduced,
A molded product take-out device that is set to switch the operating arm to a shortened state when the operating arm rotates from the mold side to the outside of the molding machine while the molded product is gripped by the chuck. The molded article take-out device according to claim 1,
A molded product take-out device that is set to switch the working arm to the extended state when the working arm rotates outward of the molding machine and moves the molded product held by the chuck to the next process. The molded product takeout device according to claim 1 or 2,
A molded product take-out device that is set to switch an operating arm to an extended state when a molded product molded with a mold is gripped by a chuck.

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