JPH0217739Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an automatic take-out trimming device for taking out and trimming a workpiece molded by a molding machine of a die-casting machine or an injection molding machine.

Conventional technology A trimming device is placed next to a molding machine such as a die-casting machine or an injection molding machine, and the workpiece formed by the molding machine is held by a workpiece holding arm and moved at right angles to the mold opening/closing direction of the molding machine. An automatic trimming device is known in which the trimming device is transferred to a trimming device, and is mounted on a trimming mold of the trimming device to perform trimming (for example, Japanese Patent Application Laid-Open No. 56-74360, Japanese Utility Model Publication No. 59-32446).

Problems that the invention aims to solve However, with the conventional automatic take-out trimming device on the upper rail, the workpiece taken out from the molding machine must be reinstalled into the mold of the trimming device, and a complicated mechanism is required for positioning and transfer. There are issues that require it.

The present invention was devised in view of such conventional problems, and it is an object of the present invention to provide an automatic take-out trimming device that eliminates the need to attach a workpiece taken out from a molding machine to a mold of a trimming device.

Means for Solving the Problems In order to solve the above problems, in the present invention, the trimming female mold 28 and the work clamp 29 are held at the tip of the work holding arm 26, and when taking out the work from the molding machine 2, The workpiece is configured to be held at a predetermined position relative to the female trimming mold. On the other hand, the trimming section 7 is provided with a movable plate 9 that holds the trimming male mold 14 and moves in parallel to the mold opening/closing direction of the molding machine, and a fixed plate 8 that faces the movable plate. The fixing plate 8 supports the back side of the work holding arm holding the female trimming mold, and supports the load applied to the female trimming mold. Furthermore, the work holding arm 2
6 in a direction perpendicular to the fixing plate 8 of the trimming section, and a cylinder mechanism 25 that moves the workpiece holding arm to a position where it contacts the fixing plate 8.
Concatenate.

Operation In the trimming device configured as described above, the workpiece holding arm 26 is placed at a position slightly apart from the fixing plate 8 of the trimming section, and in this state, it is moved in a direction parallel to the fixing plate to remove the trimming female mold 28 at the tip and the workpiece. The clamp 29 is positioned between the open molds of the molding machine, and the molded workpiece is held in a predetermined position relative to the female trimming mold by the workpiece clamp. Next, the trimming female mold holding the workpiece and the workpiece clamp are moved in front of the fixing plate 8 of the trimming section 7, and the cylinder mechanism 25 is used to
Trimming is performed by bringing the workpiece holding arm into contact with the fixing plate, and then pushing out the male trimming mold 14 toward the female trimming mold. In this operation, when the workpiece holding arm moves between the trimming section and the molding machine, the workpiece holding arm moves away from the fixed plate of the trimming section, so friction may occur between it and the fixed plate. do not have. Furthermore, during trimming, the trimming male mold is operated with the workpiece holding arm in contact with the fixing plate, which prevents a large impact from occurring between the workpiece holding arm and the fixing plate. Moreover, deformation of the workpiece holding arm is prevented.

Embodiments Hereinafter, preferred embodiments of the present invention shown in the drawings will be described in detail.

FIG. 1 is a plan view of an automatic trimming device according to a preferred embodiment of the present invention, and FIG. 2 is a side view thereof. A trimming device, designated as a whole by the reference numeral 1, is arranged next to an injection molding machine 2, designated by a chain double-dashed line. The trimming device 1 is provided movably on a rail 4 arranged parallel to the opening/closing direction (line X-X direction) of the molds (fixed mold 2A and movable mold 2B) of the injection molding machine 2. It has a movable pedestal 5 and a cylinder mechanism 6 for moving the movable pedestal 5. This movable stand 5 is equipped with various parts to be described later, and when replacing the mold of the injection molding machine 2, it creates a work space on both sides of the injection molding machine and facilitates the mold replacement work. It is movable together with the various parts thereon from the solid line position shown in FIG. 1 to the position shown by the two-dot chain line 5A. Further, a round bar 4a is arranged parallel to the rail 4 between the pair of rails 4, and the movable pedestal 5 is provided with a brake 5a that engages the round bar 4a in a sandwiching manner. The brake 5a is movable relative to the round bar 4a when loosened, but is fixed to the round bar 4a when tightened, and has the effect of fixing the movable frame 5 at any suitable position relative to the injection molding machine 2. do.

A trimming section 7 is arranged on the movable pedestal 5. The trimming part 7 is Y-Y parallel to the line X-X.
A guide rod 10 that guides the fixed plate 8 and the movable plate 9 perpendicular to the line Y-Y in a movable manner in the Y-Y direction, a cylinder mechanism 11 that moves the movable plate 9, and the fixed plate. Work discharge path 1 behind 8
2. It has a burr discharge path 13 and the like below the front surface of the fixed plate. The fixed plate 8 supports the trimming female mold, which will be described later, against the trimming load during trimming, while the movable plate 9 supports the trimming male mold 1.
Hold 4. Thus, by moving the movable plate 9 toward the fixed plate 8 in the Y-Y direction, the workpiece is trimmed by the female mold and the male mold.

The movable pedestal 5 further has rails 16 and 17 extending perpendicularly to the line XX, and a support 18 is movably supported on the rails. Furthermore, a cylinder mechanism 19 and a chain holding plate 20 that is reciprocated by the cylinder mechanism 19 are provided parallel to the rail 17. The chain holding plate 20 has chain wheels 21 at both ends (see Figures 3 and 8).
The chain wheel 21 is supported by an endless chain. In this chain, the running part on the side of the support stand 18 meshes with teeth provided on the side surface of the support stand 18, and the running part on the opposite side is fixed to the movable frame 5 at an appropriate position. Thus, when the chain holding plate 20 moves to the left in FIG. can be moved twice as much as the stroke of the cylinder mechanism 19.

As shown in an enlarged view in FIG. 3, the support base 18 includes a rail 23 extending perpendicularly to the rail 16 and thus parallel to the line X--X, a movable base 24 movably held thereon, and A cylinder mechanism 25 and the like for moving the moving table 24 is provided, and the moving table 24 supports a work holding arm 26. The workpiece holding arm 26 holds a trimming female mold 28 (see FIG. 1) equipped with a workpiece clamp 29 at its tip. The cylinder mechanism 25 is composed of two pneumatic cylinders, a small stroke pneumatic cylinder 25A and a large stroke pneumatic cylinder 25B. The small stroke pneumatic cylinder 25A functions to move the moving table 24 to the left from the position shown in FIG. Large stroke pneumatic cylinder 25
B moves the moving table 24 to the right and moves the work clamp 29 held by the work holding arm 26 in the direction of the movable mold 2B of the molding machine in FIG. Note that the cylinder mechanism 25 is not limited to a pneumatic cylinder, but may also be a hydraulic cylinder. If a hydraulic cylinder is used, the piston can be stopped at any position, so there is no need to use two cylinders. , a single cylinder is sufficient.

As shown in FIG. 4, the workpiece holding arm 26 is
It consists of two members, namely a first arm part 26A fixed to the moving table 24 and a second arm part 26B connected to it by a connecting device 31. A mold fixture 30 and a large opening 32 for attaching the trimming mold 28 are provided at the tip of the second arm portion 26B. As can be seen from FIG. 1, the mold fixture 30 has grooves into which the flanges at both ends of the female trimming mold 28 are inserted, and the mold 28 can be removed by simply inserting the mold 28 into the grooves from above. It is possible to install mold 28. Furthermore, in order to prevent the collar of the mold 28 from wobbling in the groove, the vertical portion of the mold fixture 30 is provided with a suitable means for elastically pressing the collar of the mold 28, such as a spring. A ball plunger 30a (see FIG. 4) equipped with a ball is attached.

As shown in FIGS. 5 to 7, the coupling device 31 is
First metal fitting 33 fixed to first arm portion 26A
and a second metal fitting 35 that fits into a groove 34 formed on the side of the first metal fitting 33 facing the second arm part 26B and is fixed to the second arm part 26B.
A hole 36 is formed in the second metal fitting 35, and a ball 37 is formed in the first metal fitting 33 at a position corresponding to the hole 36.
A ball plunger equipped with a spring 38 and the like for pressing the ball into the hole 36 is arranged. In this way, the first metal fitting 33 and the second metal fitting 35 are normally fixed to each other by the engagement of the ball 37 pushed by the spring 38 and the hole 36, but the second arm part 26B has an arrow Z in FIG. When a large force in the direction shown by is applied, the engagement between the ball 37 and the hole 36 is disengaged, and the second metal fitting 35 can be removed from the groove 34 of the first metal fitting 33 in the Z direction. This configuration is shown in FIG.
If the movable mold 2B of the molding machine 2 closes by mistake,
When the work holding arm 26 is pushed in the direction of the fixed mold 2A with strong force, the first arm part 26A and the second arm part 26B are prevented from coming off and damaging these arm parts and parts related thereto.

Next, the operation of the trimming device 1 will be explained.
Normally, the pneumatic cylinder 25B is extended, the pneumatic cylinder 25A is retracted, and the work holding arm 26 is in the third position when viewed from the side.
As shown in the figure, it is located slightly away from the fixing plate 8 of the trimming section 7. In FIG. 1, when molding in the injection molding machine 2 is completed and the molds 2A and 2B are opened as shown, the workpiece holding arm 26, which has a trimming female mold 28 attached to its tip, is moved to the mold 2.
It is inserted between A and 2B. Note that the position of the movable pedestal 5 is adjusted in advance so that the position of the work holding arm 26 relative to the molds 2A and 2B (position in the X--X direction) at this time is a suitable position for receiving the work. In this state, the workpiece in the mold 2B is pushed out and held in a predetermined position relative to the trimming female mold by the workpiece clamp 29. Note that if a special mold is used and the workpiece cannot be held in the workpiece clamp 29 by simply ejecting it with the ejection pin (not shown) of the mold 2B, the pneumatic cylinder 25B is activated. and move the workpiece holding arm 26 in the direction of line XX to the moving mold 2B.
move it towards. After the work clamp 29 holds the work (not shown), the support stand 18 is moved to the left by the cylinder mechanism 19, and the work clamp 29 holding the work and the trimming female mold 28 are shown in FIG. Position it on the trimming section 7 as shown. Next, the pneumatic cylinder 25A is operated to press the workpiece holding arm 26 against the fixing plate 8. In this state, the moving plate 9 is moved by the cylinder mechanism 11.
is pushed out, and the trimming male mold 14 held on the movable plate 9 is fitted into the female mold 28 to trim the workpiece. At this time, the pressing force applied to the female mold 28 is supported by the fixed plate 8. The workpiece that has been trimmed passes through the female mold 28 and is discharged from the workpiece discharge path 12 behind it. After that, the cylinder mechanism 11 returns the male mold 14 and the movable plate 9 to their original positions, and the pneumatic cylinder 25A returns the workpiece holding arm 26 to its original position slightly away from the fixed plate 8. The workpiece removal and trimming operations are completed.

In the above operation, the position of the movable pedestal 5 is set to a suitable position for taking out the work from the molding machine 2, and the work holding arm 26 is moved into the molding machine 2 with the pneumatic cylinder 25B extended. When the workpiece holding arm 26 is moved to a position suitable for receiving the workpiece, instead of this,
A stopper is provided to restrict the retracted position of the pneumatic cylinder 25B, and when receiving a work, the pneumatic cylinder 25B is moved to the position regulated by this stopper.
The position of the workpiece holding arm 26 in the X--X direction may be adjusted by retracting the workpiece holding arm 26.

Effects of the invention As described above, in the present invention, the female mold 28 for trimming and the work clamp 29 are held in the work holding arm 26, which holds the work and moves from the molding machine to the trimming section. There is no need to transfer the removed workpiece to the mold at the trimming section. Moreover, since the workpiece holding arm 26 moves away from the fixing plate 8 of the trimming section 7 when taking out the workpiece, no frictional resistance or wear occurs. Furthermore, during trimming, the work holding arm is pressed against the fixing plate 8 by the cylinder mechanism 25, and then the male trimming mold 14 is pressed against the female trimming mold 28, so that a large load during trimming is applied to the work holding arm. There will be no problem even if it is added. That is, if the trimming male mold 14 is pushed toward the female mold while the workpiece holding arm is separated from the fixing plate, the impact caused when the male mold 14 collides with the workpiece and the female mold 28 The work holding arm is attached to the fixing plate 8.
However, in the present invention, the male trimming die is pushed out while the workpiece holding arm is in contact with the fixed plate, so such damage is prevented.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an automatic take-out trimming device according to an embodiment of the present invention, Fig. 2 is a side view of the same, Fig. 3 is a sectional view of the trimming section 7, and Fig. 4 is an enlarged view of the workpiece holding arm. A front view, FIG. 5 is a top view of the coupling device 31, FIG. 6 is a cross-sectional view taken in the direction of the arrow in FIG. 5, FIG. 7 is a cross-sectional view taken in the direction of the arrow in FIG. 7 is a plan view when the supported trimming female fitting 28 is positioned in the trimming part 7. FIG. 1...trimming device, 2...injection molding machine, 2
A, 2B...Mold, 7...Trimming part, 8...
Fixed plate, 9... Moving plate, 11... Cylinder mechanism,
14...Male mold for trimming, 18...Support stand,
24...Moving table, 25...Cylinder mechanism, 25A
...Pneumatic cylinder, 26...Work holding arm,
28... Female mold for trimming, 29... Work clamp, 31... Connection device.

Claims (1)

[Scope of utility model registration request] In an automatic take-out trimming device that is placed next to a molding machine and takes out and trims a workpiece molded by the molding machine, a fixed plate placed perpendicular to the opening/closing direction of the mold of the molding machine, and a fixed plate placed parallel to the fixed plate. a movable plate that holds a trimming male mold and is movable toward the fixed plate; a cylinder mechanism that drives the movable plate; a workpiece holding arm that holds a trimming female metal fitting and a workpiece clamp; a support base for moving the work holding arm parallel to the fixed plate so that the female trimming fitting moves from inside the molding machine to a position between the fixed plate and the movable plate; , a moving table that supports the work holding arm and is movable in a direction perpendicular to the moving direction of the support stand, and a cylinder mechanism that drives the moving table, and the cylinder mechanism at least moves the work holding arm to the An automatic take-out trimming device characterized in that it is configured to be moved to a position where it comes into contact with a fixed plate.