JPH069797Y2 - Mold changer - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] <Technical Field of the Invention> The present invention relates to a mold exchanging device such as a molding machine, in particular, without providing an auxiliary plate for mounting the mold on the mold, Further, the present invention relates to a device capable of exchanging the mold without standardizing the size of the mold.

<Prior Art> In a conventional mold exchanging device, a mold can be exchanged only with respect to a mold in which the dimension from the center of the molding machine in the height direction to the upper surface of the mold conveying path is the same. For small-sized molds, the size of the mounting part to the machine is unified by mounting the mold on an auxiliary plate or the like. As an example of such a mold exchanging device, a mold having a predetermined size is pushed into the mold exchanging device, and then the lift pin is lifted by a certain amount by a hydraulic cylinder or the like located under the mold exchanging device. Lifting the mold by a predetermined amount by performing the rough positioning in the height direction of the mold and the molding machine, then fit the molding machine and the mold with the locate ring hole of the molding machine and the locate ring of the mold. Position accurately. After that, the mold is fixed to the molding machine by the clamp device.

<Problems to be Solved by the Invention> As described above, the conventional mold exchanging device must use a mold having a predetermined size, and when the mold is attached to the molding machine, the mold is raised by a certain amount. Since it is a method, the structure is simple, but the size of the mold must be constant or an auxiliary plate etc. must be provided for a small mold, so it can not be applied to molds of arbitrary size It was

It is an object of the present invention to provide a mold exchanging device capable of automatically exchanging molds without attaching auxiliary plates to molds having different heights.

[Constitution of device]

<Means for Solving the Problems> In order to achieve the above object, the mold exchanging device of the present invention includes an upper clamp for mounting and fixing the upper part of the mold on the fixed side and movable side mounting plates, and an upper clamp. The upper guide moving means that supports the mounting board so that it can move in the vertical direction in parallel with the mold mounting surface, the lower clamp that mounts and fixes the lower part of the mold on the mounting board, and the lower clamp on the mounting surface of the mounting board. And a lower guide moving means for supporting the fixed side and the movable side in parallel with each other at the same level so as to be movable by an arbitrary commanded amount in the vertical direction. The lower guide moving means includes a guide surface or a guide shaft extending in the opening / closing direction of the molding machine, and a jack mechanism for raising and lowering the guide surface or the guide shaft in a horizontal state, and supports the lower clamp on the fixed side. A vertically movable lower clamp base is supported or fitted on a guide surface or a guide shaft, and a vertically movable lower clamp base that supports a movable lower clamp is movable along the guide surface or the guide shaft. It is preferable to support or insert.

<Operation> The mold is first positioned between the fixed side and movable side mounting boards and loaded into the machine.

Next, raise the fixed side and movable side lower clamps at the same level by a predetermined amount to position the center of the mold in the height direction to the center of the machine in the height direction, then close the movable platen and then lower the upper clamps. Move to and make the upper clamp abut on the mold, and operate the upper and lower clamps to fix the mold to the mounting plate.

<Embodiment> A first embodiment of the present invention will be described with reference to FIGS.

A mold clamping cylinder (not shown in FIG. 1) and a fixed platen 11 are connected by a tie bar 12, and a movable platen 13 is provided between them. The movable platen 13 moves along the tie bar 12 by the forward / backward movement of the mold clamping piston 14 and moves toward and away from the fixed platen. In the present embodiment, the case where the support plates 15 and 16 are attached to the fixed plate 11 and the movable plate 13 will be described below. The case of having a function is also included in the present invention.

Special locate ring hole for centering the die on support plates 15 and 16
As shown in FIG. 3, 17 has a substantially triangular shape, and the upper semicircle is formed to have a size that fits with the mold side locate ring 52.

A guide groove 18 is provided on the upper side of the support plates 15 and 16 as shown in FIG. 3, and the fixed side and movable side clamp bases 22 of the fixed side and movable side upper clamps 20A and 20B are provided.
A and 23A are attached so as to be movable up and down, and guide grooves 18 and guides 19 are provided on the lower side of the support plates 15 and 16, so that fixed side and movable side lower clamps 21A and 21B are fixed and movable. The lower side clamp bases 22B and 23B are attached so as to be movable up and down.

It is the mold clamp moving cylinder 25 mounted by the mounting member 24 on the support plates 15 and 16 that moves the fixed upper clamp base 22A and the movable upper clamp base 23A.

The lower side of the fixed side clamp base 22B has a parallel member at its lower end.
It is regulated by 26, and lowering of the fixed side lower clamp 21A is regulated below this.

The movable lower clamp base 23B has wheels 27 at its lower end.
Is provided to prevent the movable lower clamp 21B from descending below the fixed lower and movable lower clamps 21A and 21B.
Are kept at the same level, and the wheels 27 move on the parallel member 26 when the movable platen 13 moves.

The parallel member 26 is movably provided on the fixed frame 50 by the vertically extending guide pin 36, and the nut 29 attached to the parallel member 26 is engaged with the feed screw 28 rotatably attached to the fixed frame 50. is doing. The feed screw 28 is connected to the electric motor 32 via a sprocket 31A, a chain 30, and a sprocket 31B.

, And at both ends of the parallel member 26, as shown in FIG.
The link 33 and the synchronous link 34, which are connected by 35, are connected to each other to balance and perform vertical movement.

A position detector 37 such as a pal scale detects the amount of movement of the parallel member 26 and feeds it back to a controller (not shown) of the electric motor 32 to perform accurate positioning control of the parallel member 26.

A die transfer roller 38 is attached to the support plates 15 and 16 to facilitate the transfer of the die 51.

With the above-described structure, according to this embodiment, the mold 51 as described below can be replaced.

The mold 51 is transferred from an external roller (not shown) to the mold conveying roller.
When loading onto 38, fixed side and movable side upper clamp
20A and 20B are placed in the ascending position, the fixed side and movable side lower clamps 21A and 21B are placed in the descending position by lowering the parallel member 26, and the maximum space is secured so that the mold 51 can be carried in. The die transfer roller 38 is aligned with the height of an external roller (not shown). The movable platen 13 is placed at a position where a space slightly larger than the thickness of the die 51 to be attached is secured between the movable platen 13 and the fixed platen 11.

The mold 51 is first positioned between the fixed platen 11 and the movable platen 13 and moved on an external roller (not shown) and the mold transfer roller 38 to be loaded into the machine and leftward and rightward with respect to the machine center. Stop at a position that almost coincides with. Next, the electric motor 32 is driven to drive the sprocket 31B, the chain 30, and the sprocket 31A.
Rotate the feed screw 28. The rotation of the feed screw 28 raises the nut 29 and thus the parallel member 26.

By raising the parallel member 26, the fixed side lower clamp base 22
As B rises, the movable side lower clamp base 23B also rises via the wheels 27, and the fixed side and movable side lower clamp bases 22B, 23B rise at the same level.

The amount of this rise is detected by the position detector 37, and the height dimension of the mold 51 is known in advance.Therefore, by giving a predetermined command value to the electric motor 32, the mold side locate ring 52 causes the supporting plate to move.
When it is moved up to the position corresponding to the special locate ring hole 17 for centering the mold on the parts 15 and 16, the electric motor 32 is stopped and the parallel member 26 is stopped and kept at that position.

Next, the mold clamping piston 14 is operated to fit the mold side locate ring 52 into the special locate ring hole 17 for centering the mold.

At this time, the movable platen 13 is stopped slightly before the complete mold clamping state, and the parallel member 26 is raised again to bring the mold side locate ring 52 into contact with the upper half circle of the special locate ring hole 17. , The mold clamping piston 14 is actuated again and the mold is clamped and locked in this state, then the fixed side and movable side upper clamps 20A and 20B are moved downward by the mold clamp moving cylinder 25, The fixed side and movable side upper clamps 20A, 20B are brought into contact with the upper end of the mold 51, and the fixed side and movable side upper clamps 20A, 20B are operated at this abutting position, and the fixed side and movable side lower clamps 21A, 21B are also operated. Actuate and clamp.

The machine with the mold 51 attached as described above starts a molding operation next time, but when the mold 51 is opened, the wheels 27 roll on the parallel member 26 to keep the movable side of the mold 51 safe. To support. The movable side of the mold 51 is fixed to the support plate 16 by the upper and lower clamps 20B and 21B, so that the movable platen is movable.
It is not necessary to provide the parallel member 26 over the entire stroke amount of 13, and it suffices if the length that can support the wheels 27 when the mold 51 is loaded into the machine is secured, and therefore the parallel member 26 is not necessarily required.
Does not have to have the length shown in FIG. Rather, it is sufficient to have a length that can accommodate various thicknesses of the mold 51.

The mold 51 may be removed in the reverse order of the work described above. A nozzle touch cylinder (not shown) is used to remove the mold 51 from the special locate ring hole 17 for centering the mold.
The mold 51 may be moved slightly by using.

Next, a second embodiment will be described with reference to FIGS. Except for the parts common to the first embodiment, the different parts will be described.

The difference from the first embodiment is that vertically extending racks 44 and 45 are provided at the lower portions of the support plates 15 and 16, respectively, and instead of the parallel member 26, a guide shaft with a spline cut (hereinafter referred to as a guide spline shaft 41) is used. The guide spline shaft 41 is provided with the spline shaft bearing 46, and the pinion 43 corresponding to the rack 45 is slidably fitted to the guide spline shaft 41, and also corresponds to the rack 44. Pinion 43
Is slidably fitted to the guide spline shaft 41.

Further, both the fixed-side lower clamp base 22B and the movable-side lower clamp base 23B have pinions 42 and 43 rotatably attached to the outer periphery of their bosses through bearings 42A and 43A.

According to the second embodiment, since it is constructed as described above, the fixed lower clamp base 22B and the movable lower clamp base 23B can be vertically adjusted as described below.

That is, when the nut 29 moves up and down by the rotation of the feed screw 28, the spline bearing 46 also moves up and down, and the guide spline shaft 41 also moves up and down in parallel.

The vertical movement of the guide spline shaft 41 causes the pinions 43 and 42, which are slidably fitted to the guide spline shaft 41 and engaged with the racks 44 and 45, to rotate.

The rotations of the pinions 43 and 42 are naturally synchronized by the guide spline shaft 41, and the racks 44 and 45 are fixed in the vertical direction, so that the guide spline shaft 41 is translated. As a result, the fixed lower clamp base 22B and the movable lower clamp base 23B are vertically adjusted at the same level. In the above-described embodiment, the support plate 1 is supported by bringing the mold-side locate ring 52 on the mold 51 side into contact with the upper semicircle of the special locate ring hole 17 on the support plates 15 and 16.
Although the example in which the final positioning of the molds 5 and 16 and the mold 51 is performed is shown, the present invention is not limited to this, and the final positioning may be performed by an ordinary taper type locate member. The lower guide moving means for moving the movable side clamps 21A and 21B up and down at the same level is not limited to the first and second embodiments, and needless to say, can be variously modified.

<Effects of the Invention> As described above, according to the mold exchanging device of the present invention, even if the molds have different sizes, the molds can be replaced with a high degree of freedom.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing a first embodiment of a mold exchanging device of the present invention, FIG. 2 is an enlarged view of a C portion of FIG. 1, and FIG. 3 is AA of FIG. FIG. 4 is a partially cutaway side view showing a second embodiment of the present invention, and FIG. 5 is a sectional view taken along line BB in FIG. 11 …… Fixed board, 12 …… Tie bar, 13 …… Movable board, 14 ……
Mold clamping piston, 15, 16 …… Support plate, 17 …… Special locate ring hole, 18 …… Guide groove, 19 …… Guide, 20A…
… Fixed side upper clamp, 20B …… Movable side upper clamp,
21A: Fixed lower clamp, 21B: Movable lower clamp, 22A: Fixed upper clamp base, 22B: Fixed lower clamp base, 23A: Movable upper clamp base, 23B: Movable lower clamp Base, 24 …… Mounting member, 25 …… Mold clamp moving cylinder, 26 …… Parallel member, 27 …… Wheel, 28 …… Feed screw, 29 …… Nut,
30 …… Chain, 31A, 31B …… Sprocket, 32 ……
Electric motor, 33 ... Link, 34 ... Synchronous link, 35 ... Synchronous shaft, 36 ... Guide pin, 37 ... Position detector, 38 ... Mold transfer roller, 41 ... Guide spline shaft, 42, 43 …… pinion, 42A, 43A …… bearing, 44,45 …… rack, 46 …… spline shaft bearing, 50 …… fixed frame,
51 …… Mold, 52 …… Locate ring on the mold side.

Claims (2)

[Scope of utility model registration request] 1. In an apparatus for exchanging a die to and from a molding machine, an upper clamp for attaching and fixing an upper portion of the die to a fixed side and a movable side mounting board, respectively, and the upper clamp for the mounting board. Upper guide moving means for movably supporting the mold mounting surface in the vertical direction in parallel with each other, a lower clamp for fixing and fixing the lower part of the mold to the mounting plate, and a lower clamp for mounting the lower clamp on the mounting plate. The lower guide moving means, which is parallel to the mold mounting surface and supports the fixed side and the movable side so as to be movable at the same level in the vertical direction by an arbitrary dimension, is provided, and the lower guide moving means opens and closes the molding machine mold. Has a guide surface extending in a direction and a jack mechanism for vertically moving the guide surface while keeping the guide surface horizontal, and supports a vertically movable lower clamp base supporting the lower clamp on the fixed side on the guide surface. In addition, the mold exchanging device is characterized in that a vertically movable lower clamp base that supports a movable lower clamp is movably supported along the guide surface. 2. An upper clamp for fixing and fixing the upper part of the mold to a fixed side and a movable side mounting plate in a mold exchanging device for carrying out and carrying in the mold to the molding machine, and the upper clamp for the mounting plate. Upper guide moving means for movably supporting the mold mounting surface in the vertical direction in parallel with each other, a lower clamp for fixing and fixing the lower part of the mold to the mounting plate, and a lower clamp for mounting the lower clamp on the mounting plate. The lower guide moving means, which is parallel to the mold mounting surface and supports the fixed side and the movable side so as to be movable at the same level in the vertical direction by an arbitrary dimension, is provided, and the lower guide moving means opens and closes the molding machine mold. A guide shaft extending in the same direction and a jack mechanism for vertically moving the guide shaft while keeping the guide shaft horizontal, and a vertically movable lower clamp base that supports a fixed lower clamp is fitted into the guide shaft. At the same time, a vertically movable lower clamp base that supports a lower clamp on the movable side is movably fitted along the guide shaft.