JP3872543B2 - Air floating mold changer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air flotation type mold exchanging apparatus applied to exchanging molds for molding machines such as injection molding machines and press machines.
[0002]
[Prior art]
FIGS. 9 to 11 show a Japanese Patent Application No. 5-71815 of a conventional example of a die replacement cart. This mold exchanging carriage is used for exchanging molds for molding machines such as injection molding machines and press machines. In the figure, 50 is a carriage for exchanging molds, 51 is a carriage main body whose plane is rectangular. , 52, 53 are four air pads and leg pads respectively fixed to the four corners of the lower surface of the cart body 51, and 54, 55 are V-shaped convex blocks and flat surfaces fixed at intervals on both side surfaces. A block 56 is a handle.
[0003]
57a and 57b are traveling wheels of the same structure fixed on the lower surface of the cart body 51. The traveling wheels 57a are for traveling in the longitudinal direction (longitudinal direction) of the cart body 51, and the traveling wheels 57b are the longitudinal wheels. It is for running in the lateral direction perpendicular to the direction. Both traveling wheels 57a and 57b are rotatably supported by a frame 59 with a rubber roller 58 having a large friction. Then, both ends of the frame 59 are pinned to the rods of two air cylinders 60 fixed to the lower surface of the cart body 51, and the air motor 61 fixed to the frame 59 is directly connected to the rotating shaft of the rubber roller 58. is doing. The central surfaces of the traveling wheels 57 a and 57 b are arranged so as to pass through the center of gravity of the carriage main body 51. A mold moving device 62 is provided on the carriage main body 51, and includes a driving conveyor 63, a driving air motor 64, a guide 65, and the like.
[0004]
66 is an air switching valve for operation, and is composed of switching valves for floating the carriage (for the air pad 52), traveling in the vertical and horizontal directions (for the air cylinder 60 and the air motor 61), and for moving the mold (for the air motor 64). Has been. 67 is an air hose for supplying compressed air, and 69 is a hose protection roller having a U-groove, which is rotatably attached to the floor where the carriage 50 changes its direction. 70 and 71 are V-shaped concave blocks and flat blocks fixed on the molding machine 75 side, 72 is a floor pad fixed on the floor before the molding machine 75, 73 is a drive conveyor for the molding machine 75, and 74 is gold. A mold 75 is a molding machine.
[0005]
In the mold exchanging apparatus, when compressed air is sent to the mold exchanging carriage 50 by opening the carriage floating valve of the air switching valve 66, the air pad 52 swells upside down and blows out from the hole on the lower surface. The air pad 52 floats away from the floor surface due to the air that flows. Further, the traveling wheels 57 a and 57 b of the cart body 51 are rotated to move the cart 50 in front of the target molding machine 75. That is, when the longitudinal or lateral traveling valve of the air switching valve 66 is opened, the traveling wheel 57a or the traveling wheel 57b is lowered by the air cylinder 60 and comes into contact with the floor, and at the same time, the air motor 61 is rotated. Travel vertically or horizontally. The direction is changed by manually operating the handle 56 and rotating the carriage 50. When it reaches the front of the molding machine 75, first, the V-shaped convex block 54 provided on the cart body 51 is fitted into the V-shaped concave block 70 provided on the molding machine 75 side, and the cart body 51 side The flat block 55 is brought into contact with the flat block 71 on the molding machine 75 side, and the air from the air pad 52 is released while maintaining this state.
[0006]
As a result, the carriage 50 descends and stops by contacting the leg pad 53 on the lower surface of the carriage body 51 on the floor pad 72 on the floor side. The height of the floor pad 72 is adjusted in advance so that the height of the drive conveyor 63 of the die moving device 62 on the cart 50 side is the same as the height of the drive conveyor 73 on the molding machine 75 side. Next, the mold 74 is put into and out of the molding machine 75 using the mold moving device 62 provided on the carriage main body 51. The driving conveyor 63 is driven by an air motor 64. The air hose 67 is fed out from a reel (not shown) provided at the base. A hose protection roller 69 is provided at a location where the carriage 50 bends so as not to interfere with peripheral devices, and the movement resistance of the air hose 67 is reduced.
[0007]
[Problems to be solved by the invention]
The above-mentioned conventional mold exchanging cart is an air-floating type and can be moved and installed at the location where the molding machine needs to be exchanged. Is moved to an engagement position with the molding machine, and is performed by a roller-type drive conveyor of a mold moving device. The width direction of the drive conveyor is fixed and the size of the mold to be mounted is limited, and the height of the drive conveyor also requires the moving conveyor of the molding machine and adjustment each time.
[0008]
In addition, only one set of molds can be mounted on the above-mentioned cart for exchanging molds. Therefore, after moving the exchange mold from the molding machine to another place, the mold to be exchanged is transferred. Therefore, it takes a lot of manpower and time to replace the mold, which increases the cost including the equipment.
[0009]
The object of the present invention is to make it possible to carry out mold replacement without special movement means and adjustment, continuously and without the need for human power means, reducing the number of mold replacement man-hours or shortening the replacement time. An object of the present invention is to provide a mold exchanging device that has a reduced exchanging cost.
[0010]
[Means for Solving the Problems]
The present invention is intended to solve the above problems, means for its gist, an injection molding machine having a fixed platen and a movable platen for fixing a pair of the stationary mold and the movable mold, the molding machine such as a press machine molding In a mold exchanging apparatus for exchanging molds, an air capable of mounting the mold on the exchange table by arranging the mold exchange table having a frame provided at a constant height on the outer periphery in the molding machine. A floating type receiving plate for holding the lower surface of the mold, a holding base for positioning the combination direction of the mold, and a mold moving device in which a mold receiving base integrally formed with a mold positioning bracket is fixed to the upper surface A transfer table in which a frame for loading / unloading a mold into / from the molding machine is provided at a constant height on the outer periphery is inserted between the fixed platen and the movable platen from the center of the exchange table. disposed allowed protruding manner, and most small clamping dimension of the mold The width is also small, and the structure is integrated with the exchange table, the mold can be maintained or prepared on the exchange table, and the mold can be taken out and fed from the molding machine continuously. It is in the air floating mold changer.
[0011]
In the above means, it is preferable that the mold moving device is detachably mounted on the upper surface of the mold receiving table corresponding to various mold sizes.
[0012]
According to the above means, a plurality of mold moving devices are placed on a single exchange table, and a mold for changing molds is always provided and mounted, and is integrated from the center of the exchange table. In addition, the transfer table for picking up and feeding out the mold is set to a width smaller than the minimum tightening dimension of the mold, so that it is not limited to the size of the mold. The mold can be exchanged without changing or adjusting the table. Therefore, by combining a replacement table of the same size and a plurality of mold moving devices, a plurality of molds can be exchanged continuously.
[0013]
In the above means, a vertical or pivotable handle is attached to the front of the mold moving device, and the mold moving device is moved by operating the handle when the mold is replaced, and the mold is when to wait on exchange table is one of the specific means of the present invention with the child configured allowed to position the handle in a vertical direction.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. FIGS. 1-7 is a block diagram of the metal mold | die exchange apparatus based on 1st Embodiment of this invention. The mold exchanging apparatus 1 according to this embodiment is used for a mold for a molding machine such as an injection molding machine or a press. In FIG. 1, 1 is a mold exchanging device, 2 is a mold exchanging table, and the exchanging table 2 is arranged in parallel with an injection molding machine 75. Two air-floating mold moving devices 3 are placed in parallel on the exchange table 2, and mold receiving bases 4 </ b> A and 4 </ b> B are fixed to the upper surface of the mold moving device 3.
[0015]
On both sides of the exchange table 2, an operation panel 6 is fixed via a bracket 11, and a reel and an air switching valve for automatically winding an air hose 12 are provided inside the operation panel 6. . In addition, a fixed hose 13 connected to an air supply source is connected to the operation panel 6, and air can be switched by operating the handle 6a. 7 and 8 are molds for a molding machine, and the molds 7 and 8 are positioned and held by the mold bases 4, 4 A and 4 B, and can be moved on the exchange table 2 by the floating of the mold moving device 3. It has become.
[0016]
FIG. 2 shows details of the exchange table 2. In the figure, the upper surface of the exchange table 2 has a convex shape, a table 21 having a space in which a plurality of the mold moving devices 3 can be placed, and a central portion. It is comprised by the conveyance table 22 protruded from. A frame 23 for preventing the mold moving device 3 from falling off is provided at a constant height on the outer periphery, and a frame 23 a at the tip of the transfer table 22 serves as a positioning stopper for the mold moving device 3. . The conveyance table 22 is disposed so as to enter between the injection molding machine fixed platen 75a and the movable platen 75b, and has a structure for supporting the load of the mold conveyed by the support column 24. Moreover, the connection part of the said table 21 and the conveyance table 22 is made into the frame 23b which has an inclination, and the smooth movement of the metal mold | die moving apparatus 3 from the table 21 to the conveyance table 22 becomes easy.
[0017]
3 to 4 show details of the air-floating mold moving device 3. The mold moving device has a pad plate 26 fixed to the lower portion of the frame 25 with a bolt 30 via a bracket 25a. A plurality (three in this embodiment) of air pads 28 are disposed on the lower surface of the pad plate 26. An L-type joint 31 is connected to the air supply port 28 a of the air pad 28, and the L-type joint 31 is connected to an L-type joint 34 fixed to the front surface of the moving frame 25 via pipes 32 and 33. Reference numeral 29 denotes a handle. The handle 29 is attached to the upper end of the frame 25 so as to be vertically and horizontally rotatable via a hinge. In addition, screw holes (plurality) 25b for fixing the mold cradles 4A and 4B and alignment pins 25c are disposed on the front and rear portions of the upper surface of the frame 25.
[0018]
FIG. 5 shows the details of the mold cradle 4 (4A, 4B). The mold receiving bases 4A and 4B differ depending on the size of the molds mounted thereon, and in this embodiment, only two of them are shown. In FIG. 5, the mold receiving bases 4A and 4B are integrally formed by fixing holding bases 36a and 36b for positioning the combination direction of the molds at the centers of receiving plates 35a and 35b that hold the lower surface of the mold. Yes. The longitudinal dimension L and the mounting dimensions P1, P2, and P3 to the frame 25 are the same as those of the mold receiving bases 4A and 4B, and the heights of the receiving plates 35a and 35b and the holding bases 36a and 36b are the same. The dimensions H1, H2 and the width dimensions W1, W2, W3 are determined by the size of the mold to be mounted.
[0019]
Further, in order to facilitate engagement with the mold, inclined surfaces 36c, 36d, 36e are provided on the upper and distal ends of the holding bases 36a, 36b, and the longitudinal directions (both sides) of the upper surfaces of the receiving plates 35a, 35b are provided. ) A trapezoidal mold positioning metal fitting 37 is provided at the center. Further, a bolt hole 35c that engages with the screw hole 25b of the frame 25 of the mold moving device 3 and a vertical groove 35d that engages with the alignment pin 25c are provided in the front and rear portions, respectively.
[0020]
Based on FIGS. 6 to 7, the installation size in the conveyance table 22 of the exchange table 2 and the mold fixing part of the molding machine 75 will be described. The width dimension M of the transfer table 22 is 3 to 10 mm smaller than the combined dimension N of the minimum molds which do not come into contact even when the mold 8 (8a, 8b) is clamped. The gap L with respect to 41 is set to 2 to 5 mm, and the height is set to the minimum dimension that does not interfere with the tie bar 43.
[0021]
The frame 25 width R of the mold moving device 3 is smaller than the inner width M1 of the transfer table 22 by 3 to 10 mm, and the frame 25 does not engage with the table 22 during mold clamping. Further, the locating ring 44 provided on the convex portion 8c of the fixed mold 8a and the fixed platen 41 is provided with a tapered guide portion 44a and an engaging portion 44b for absorbing misalignment as shown in FIG. The shape makes it easier to align the mold 8 and the stationary platen 41.
[0022]
Next, the operation of the mold exchanging apparatus 1 configured as described above will be described. On the upper surface of the exchange table 22 of the mold exchanging apparatus 1 provided side by side with the injection molding machine 75, two mold moving apparatuses 3 to which the mold receiving bases 4A and 4B are fixed are mounted. One of the molds 7 to be used next is mounted and held, and the remaining one is kept on the exchange table 2 to take out the mold 8 incorporated in the molding machine 75.
[0023]
When the switching valve is opened by operating the handle 6a of the operation panel 6 to send the compressed air to the mold moving device 3 shown in FIGS. 3 to 4, the air pad 28 swells upside down, and the air pad 28 Due to the air ejected from the hole on the lower surface of the air pad 28, the air pad 28 floats away from the table surface (floats by a dimension H shown in FIG. 4B) and can be conveyed.
[0024]
As shown in FIG. 1, when changing the mold, first, the handle 6a of the operation panel 6 of the mold moving device 3 (in which the mold receiving base 4B is fixed) on which the mold is not mounted is moved. By operating, the compressed air is sent to the mold moving device 3 and floated. Then, the handle 29 of the mold moving device 3 is tilted forward, and the mold moving device 3 is aligned with the holding table 36b of the mold receiving table 4B and the mold 8 within the protruding transfer table 22 by operating the handle. When it is fed in, the front end of the frame 25 of the mold moving device 3 comes into contact with the front end frame 23 a of the transfer table 22, whereby positioning in the width direction with the mold 8 is performed.
[0025]
Here, the handle 6a of the operation panel 6 is operated again to pressurize the air pad 28 of the mold moving device 3 with compressed air, so that it further floats, and the lower surface of the mold 8 is the receiving plate 35b of the mold receiving base 4B. It is held on the upper surface by fitting the positioning fitting 37 and the trapezoidal depression 8 c of the mold 8.
[0026]
The mold clamp (not shown) of the fixed platen 41 of the injection molding machine 75 is loosened, and the movable platen 42 is retracted to a position where the convex portion 8c of the fixed die 8a is separated from the locating ring 44 of the fixed platen 41 (FIG. 6 to 7), by loosening the mold clamp (not shown) of the movable platen 42, the mold 8 (8a, 8b) is separated from the movable platen 42 and mounted on the mold moving device 3. Then, by pulling out the handle 29 of the mold moving device 3, the mold moving device 3 is moved to the standby position of the table 21 (the right end of the table 21), and the handle 6a of the operation panel 6 is operated to apply a negative pressure to the air pad 28. The state is temporarily stored on the exchange table 3.
[0027]
Next, the mold moving device 3 on which the mold 7 to be newly incorporated in the injection molding machine 75 is floated in a movable state by operating the handle 6 a of the operation panel 6, and the transfer table 22 is operated by operating the handle 29. Move in. The mold 7 sent into the transfer table 22 is positioned in the width direction of the mold 7 by the front end of the frame 25 of the mold moving device 3 coming into contact with the front end frame 23 a of the transfer table 22. The mold 7 positioned in the width direction is aligned in the height direction by air operation of the operation panel 6, and the projecting portion 7 c of the mold 7 is moved to the locating ring of the fixed plate 41 by the forward movement of the movable plate 42. 44, the mold 7 is sandwiched between the fixed platen 41 and the movable platen 42, and the fixed die 7a and the fixed platen 41, the movable mold 7b and the movable platen 42 via a mold clamp (not shown). Fix it.
[0028]
When the fixing of the mold 7 is completed, the mold moving device 3 is lowered to the lowest position where it can be moved by operating the operation panel 6, and the trapezoidal depression 7c and the positioning bracket 37 of the mold 7 are moved horizontally. The mold moving device 3 on which the mold is not mounted is moved to the standby position of the table 21 (the left end of the table 21) by pulling out the handle 29. Then, the handle 6a of the operation panel 6 is operated to bring the air pad 28 into a negative pressure state, and the lower surface of the frame 25 is brought into contact with the upper surface of the table 21 to be temporarily stored. The handle 29 of the mold moving device 3 stored in the table 21 is positioned in the vertical direction so that it protrudes outside the replacement table 2 and does not interfere with other members. Further, the mounting / removal of the mold on the mold moving device 3 placed on the exchange table 2 is performed by lifting means such as a crane provided separately.
[0029]
FIG. 8 shows a mold moving apparatus according to another embodiment of the present invention. In this embodiment, the shape of the mold cradle fixed to the mold moving device 3 is changed. The difference will be described with reference to FIG.
[0030]
104 (104A, 104B) is a mold cradle, and the mold cradles 104A and 104B are the same parts as the mold cradle 4A, 4B of the embodiment of FIGS. 1-7 except for the positioning brackets 107a, 107b. It is constituted by. The positioning brackets 107a and 107b are fixed to the end surfaces of the holding bases 36a and 36b by bolts or the like, and when the mold is mounted, the side surfaces of the mold are brought into contact with the inner side surfaces of the positioning brackets 107a and 107b for positioning. . Other configurations and operations are the same as those of the embodiment shown in FIGS.
[0031]
【The invention's effect】
The present invention is configured as described above. According to the present invention, a plurality of mold moving devices are placed on a single exchange table, and a mold for constantly changing molds is maintained and mounted, and is on standby. In addition, the transfer table for taking out and sending in the mold is provided so as to protrude integrally from the central part of the exchange table, and the width of the mold is smaller than the minimum mold clamping dimension of the mold. However, it is possible to replace the mold without changing or adjusting the mold moving device and the transfer table.
[0032]
This eliminates the need to move the mold exchanging carriage and move to the mold storage location each time the mold is replaced, and allows the mold to be taken out and fed continuously. Time can be reduced, and the cost for mold replacement can be reduced. In addition, since the mold moving device is an air floating type by supplying compressed air, an effect that only a small amount of power is required to move the mold can be obtained.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a mold exchanging apparatus according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a mold exchange table according to the embodiment.
FIG. 3 is a perspective view showing a mold moving device according to the embodiment.
4 is a cross-sectional view taken along the line S-S in FIG. 3;
FIG. 5 is a perspective view showing a mold cradle according to the embodiment.
FIG. 6 is a cross-sectional view showing the installation relationship of the mold exchange table according to the embodiment.
7 is a partial cross-sectional view of the locate ring in FIG. 6. FIG.
FIG. 8 is a perspective view showing another embodiment of a mold cradle according to an embodiment of the present invention.
FIG. 9 is a perspective view showing a conventional mold exchanging carriage.
10 is a front view of FIG. 8. FIG.
11 is a plan view of FIG. 8. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Mold changing apparatus 2 Exchange table 3 Mold moving apparatus 4, (4A, 4B), 104 Mold receiving stand 6 Operation panel 7, 8 Mold 21 Table 22 Transfer table 25 Frame 26 Pad plate 28 Air pad 29 Handle

Claims (3)

Injection molding machine having a fixed platen and a movable platen for fixing a pair of the stationary mold and the movable mold, in the mold exchanging apparatus for exchanging a molding die of a molding machine such as a press machine, the frame is outer periphery the molding machine An exchange table of the above-mentioned molds provided at a certain height is arranged side by side, and a receiving plate for holding the lower surface of the above-mentioned mold, an air floating type on which the above-mentioned mold can be mounted , A frame for loading / unloading the mold into / from the molding machine by placing a plurality of mold moving devices with a holding base for positioning the assembly direction and a mold receiving base integrally formed with a mold positioning bracket fixed to the upper surface. Is arranged so as to protrude from the center of the exchange table so as to enter between the fixed plate and the movable plate , and is smaller than the minimum mold clamping size of the mold. Width and integral structure with the exchange table, the mold The replacement maintenance or to allow ready on the table, forming machine air floating mold changer characterized by continuously be enforceable to constitute and the mold was removed, infeed than.   The mold moving device is detachably mounted on its upper surface with a mold cradle corresponding to various mold sizes, and a plurality of molds can be formed by the same size exchange table and the same mold moving device. 2. The air floating mold exchanging apparatus according to claim 1, wherein the air flotation mold exchanging apparatus is configured to be exchangeable. A handle that can be rotated vertically or horizontally is attached to the front of the mold moving device, and the mold moving device is moved by operating the handle when replacing the mold, and the mold is placed on the exchange table. The air-floating mold exchanging apparatus according to claim 1 or 2, wherein the handle is positioned in a vertical direction when the apparatus is on standby .

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