JPH11199013A - Die changing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To considerably shorten workhours at the time of changing dies and improve work efficiency in the case of using a molding machine of large mold clamping force or using many kinds of dies in a plurality of molding machines in a relatively large-scaled molding plant. SOLUTION: A die changing system is provided with die storage racks 40 for storing a plurality of dies used for molding machines 31A-31D, an air- levitated die conveying truck 50 for conveying dies between the die storage racks 40 and the molding machines 31A-31D, and a stacker 70 provided in line with the die storage racks 40 so as to travel along the die storage racks 40. The stacker 70 is provided with a support part for supporting the air- levitated die conveying truck 50, and elevating mechanism for elevating the support part into a die transferable position between the air-levitated die conveying truck 50 and the die storage racks 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold changing system provided in a plastic molding factory, for example.

[0002]

2. Description of the Related Art Conventionally, in a plastic molding factory or the like, a mold exchanging system for exchanging a mold attached to a molding machine with a mold stored in a mold storage area (mold storage rack). Various techniques have been proposed. For example, a technique disclosed in Japanese Patent Application Laid-Open No. 04-267111 will be described with reference to FIGS.

FIG. 13 shows a layout of a small-sized molding plant to which the mold changing system is applied. As shown in FIG.
Forming machines 1A and 1B for 5 ton class are in the front row,
Molding machines 1C and 1D for the 0 ton class are arranged in the back row. In addition, behind the molding machines 1A to 1D (the lower part in FIG. 13), a movable mold exchanging cart 4 is juxtaposed at an adjacent position at the time of mold exchanging. further,
In a side space of these molding machine groups 1A to 1D, a mold storage slide rack 3 for housing a mold 2 used in these molding machine groups 1A to 1D is provided upright.

[0004] Further, in such a molding factory, one manually-traveled mold transporting trolley 5 is provided, and this mold transporting trolley 5 is mounted on the mold storage slide rack 3 and each molding machine 1A.
1D, the mold 2 can be conveyed between them by traveling with the mold exchanging trolley 4 placed side by side. In addition, a rail 6 for positioning the trolley is also laid in order to position the die transport trolley 5 sideways on the die storage slide rack 3 for positioning.

[0005] In FIG. 13, arrows P and Q indicate a traveling route of the mold transporting vehicle 5. Hereinafter, the mold exchanging system will be described in more detail with reference to FIGS. First, the specifications of the mold 2 incorporated in such a molding machine will be described with reference to FIGS.

As shown in FIGS. 14 (A) and 14 (B), the specifications of the mold 2 are, for example, those used in a molding machine for a molding force of 25 ton class, in which both the mouth dimensions a and b are 250 mm at the maximum. ,
The horizontal length c has a size of 140 to 300 mm, and has a weight that fits into a maximum weight of 120 kg. Also,
For example, when used in a molding machine for a molding force of 50 ton class, both the mouth dimensions a and b are 300 mm at the maximum and the horizontal length c is 1 mm.
Has a size of 60-350mm, maximum weight 200kg
With a weight that fits in

Next, the mold housing slide rack 3 will be described with reference to FIGS. As shown in FIGS. 15A and 15B, the mold storage slide rack 3
A rack plate 8 is erected on the outer frame 7 in three stages, and a guide frame 9 is laid on each rack plate 8 at equal intervals and divided into four mold storage sections, and a total of 12 mold mounting sections are provided. It is configured as having a mounting surface 10.

As shown in FIG. 16, idle rollers 11 pivotally supported by a guide frame 9 are arranged in front and rear directions on each of the mold mounting surfaces 10, and the mold 2 is slid thereon. You can slide it. In FIG. 16, reference numeral 12 denotes an interval adjusting frame for changing the width of the die mounting surface 10 in accordance with the size of the accommodated mold 2, and numeral 13 denotes the accommodated mold. 4 shows a stopper for preventing the mold 2 from dropping.

Since the mold slide rack 3 is configured as described above, a large number of molds 2 can be stored three-dimensionally and compactly without occupying a large installation area. Insertion and removal of the mold 2 from the mounting surface 10 can be manually performed without difficulty. Next, the mold exchanging cart 4 will be described with reference to FIG.

[0010] As shown in FIG.
Each of the molding machines 1A to 1D is configured such that two mold mounting surfaces are formed on a turntable disposed at the same height position as the mold mounting height. The mold 2 can be easily moved in and out by sliding operation. The mold exchanging cart 4 is retracted to a position where it does not hinder the operation except when the mold is exchanged. It is not necessary to prepare the mold changing carriage 4 for each of the molding machines 1A to 1D, and one molding machine may be shared by a plurality of molding machines.

The mold exchanging trolley 4 is provided with a turntable 16 rotatable about a vertical axis (arrow X in FIG. 17) on a trolley 14 on which a caster is mounted on a supporting leg 15. , Mold opening 1 in opposite position
It is formed by forming two mold mounting surfaces 17 and 17 having 8,18. On these mold mounting surfaces 17, 17, idle rollers 20 pivotally supported by an outer frame 19 are arranged in the mold insertion / removal direction, and the mold 2 is slid and slid thereon. You can do it.

In FIG. 17, reference numeral 21 denotes an interval adjusting frame for making the width of the mold mounting surface 17 variable according to the size of the mold 2, and reference numeral 22 denotes a fall prevention of the loaded mold 2. 1 shows a stopper for each. Since the mold exchanging cart 4 is configured as described above, by turning the turntable 16, the direction of the entrance 18 of each mold placing surface 17 can be easily adjusted. Placement surface 17
Can easily be directed to the mold transfer position. In addition, the mold transfer operation on the mold mounting surface 17 can be easily performed manually.

Next, with respect to the mold carrier 4, FIG.
This will be described with reference to FIG. As shown in FIGS. 18 and 19, the mold transporting trolley 5 has a frame 26 erected on a trolley 23 having wheels 24 and 25 and
A motor-driven lifter 27 having surface mold mounting surfaces 28, 28 is provided so as to be movable up and down. This mold transfer cart 5
Is driven by pushing the cart 23 manually, and the electric lifter 27
The vertical positioning is performed by operating the lever of the operation panel 29. That is, the mold transporting trolley 5 is a simple manual traveling type provided with the electric lifter 27.

Since the conventional mold exchanging system is configured as described above, the mold exchanging is performed as described below. That is, for example, when the mold of the molding machine 1D is exchanged, as shown in FIG. 13, first, the desired mold 2 is pulled out from the storage section of the mold storage slide rack 3, and
The mold carrier 4 is transferred to the mold mounting surface 28 of the electric lifter 27 of the mold carrier 5 laterally mounted on the mold storage slide rack 3, and then the mold carrier 5 is replaced with the molding machine 1 </ b> D. The mold 2 is transported to the vicinity of the cart 4 (indicated by an arrow P in FIG. 13), and the conveyed mold 2 is transferred to one mold mounting surface 17 of the mold exchanging cart 4.

On the other hand, in the mold exchanging trolley 4, after the mold 2 pulled out from the molding machine 1D is transferred to the other empty mold mounting surface 17, the turntable 16 is turned to convey the mold. The mold 2 transferred from the cart 5 is inserted into the molding machine 1D, and the mold 2 taken out of the molding machine 1D is moved from the mold mounting surface 17 to the mold of the electric lifter 27 of the mold transport cart 5. It is transferred to the mounting surface 28.

That is, by providing a turntable 16 having two mold platforms 17 on the mold exchanging trolley 4, the new and old dies are exchanged between the molding machine 1D and the mold delivery trolley 5 in a continuous process. It is done in. Then, the mold transporting trolley 5 on which the dies 2 are transferred from the mold exchanging trolley 4 travels (shown by an arrow Q in FIG. 13) to the horizontal position of the dies storing slide rack 3, and the molding machine 1D The mold 2 taken out of the container is returned to a predetermined storage section.

Thus, the mold exchange is completed by reciprocating the mold carrier 4 between the mold storage slide rack 3 and the molding machine 1D for mold exchange. In addition, the replacement operation is similarly performed for the other molding machines 1A, 1B, and 1C.

[0018]

However, in the above-mentioned prior art, the number of types of molds 2 used in a molding machine increases with the demand for high-mix low-volume production in a plastic molding factory, and the frequency of mold replacement is increased. Since it has been increasing more and more, it has been proposed to improve the efficiency of the management and replacement work of the mold 2. However, this technology provides a simple and inexpensive mold replacement system suitable for a small-scale molding factory. It is intended to be built.

For this reason, in a molding plant of a relatively large scale, when a molding machine having a large clamping force is used or when many types of dies 2 are used in a plurality of molding machines, this technique is applied as it is. Difficult to do. In other words, when a molding machine having a large clamping force is used, the mold 2 of the molding machine is inevitably heavy in weight, and therefore, the transfer between the molding machine and a storage place of the mold 2 such as a mold storage rack. Is generally carried out by hanging with a crane, or by a carrier truck running on rails.

However, in the case of hanging with a crane,
Since it is necessary to pay particular attention to safety in the work, it is difficult to improve the work efficiency. In addition, in the case of carrying out by using a carriage traveling on rails, it is necessary to lay rails, so that a plurality of molding machines cannot be arranged at arbitrary positions, and the layout thereof is restricted. If a plurality of molding machines are already arranged at arbitrary positions, it is difficult to lay the rails.

On the other hand, when many types of molds 2 are used, the molds 2 are stored in a three-dimensional mold storage rack or the like by an elevating device such as a stacker crane. In addition, since the work of transferring from the carrier to the elevating device is required, the work efficiency is reduced. In order to prevent a decrease in work efficiency due to such transfer work, it is conceivable to configure the mold transporting cart of the prior art as having a height approximately equal to that of the mold storage rack. It takes time for the mold to be transported by the mold carrier, and it is considered that the working efficiency cannot always be improved.

The present invention has been made in view of the above problems, and is intended for a case where a molding machine having a large clamping force is used in a molding factory having a relatively large scale, or a case where a plurality of molding machines use many types of molds. It is an object of the present invention to provide a mold exchanging system capable of greatly reducing the work time for mold exchanging and improving the working efficiency even when the mold is used.

[0023]

For this reason, a mold exchanging system according to the present invention comprises a mold accommodating rack for accommodating a plurality of molds used in a molding machine, and a mold accommodating rack for accommodating the mold accommodating rack and the molding machine. An air-floating mold transporting trolley for transporting the mold between the molds, and a stacker arranged in parallel with the mold storage rack and running along the mold storage rack. A support unit for supporting the mold carrier; and an elevating mechanism for moving the support unit up and down to a position where the mold can be transferred between the air-floating mold carrier and the mold storage rack. It is characterized by:

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 12 show a mold exchanging system according to the present embodiment. here,
FIG. 1 is a diagram showing an example of a layout of a molding machine and a mold storage warehouse in a factory to which the mold changing system according to the present embodiment is applied. FIG. 2 is a schematic front view of the mold changing system according to the present embodiment, and is a view as viewed in the direction of arrow A in FIG. FIG. 3 is a schematic side view of the mold changing system according to the present embodiment, and is a cross-sectional view taken along the line BB of FIG. FIG. 4 is a side view schematically showing an air-floating mold transfer cart. FIG. 5 is a plan view schematically showing a part of an air-floating mold transporting trolley and a mold storage rack. FIG.
FIG. 2 is a perspective view schematically showing an air-floating mold transport cart and a stacker.

The mold exchanging system according to the present embodiment
It is a suitable mold changing system used when a molding machine having a large clamping force is used in a molding factory of a relatively large scale or when many types of dies are used in a plurality of molding machines. As shown in FIG. 1, the exchange system includes a plurality of (here, four) molding machines 31 </ b> A to 31 </ b> D and a mold storage rack (hereinafter, referred to as a rack) 4 for storing and storing molds.
0, an air-floating mold carrier (hereinafter referred to as an air carrier) 50 that can be manually run as a mold carrier, and a stacker 70.

Note that the plurality of molding machines 31A to 31D are arranged at arbitrary positions. In this embodiment, since the mold is transported by the air carriage 50, it is not necessary to lay a rail to transport the mold from the molding machines 31A to 31D to the rack 40, and the clamping force is not required. A heavy metal mold used in a molding machine having a large weight can be easily transported.

First, regarding the rack 40, FIGS.
This will be described with reference to FIG. The rack 40 is shown in FIG.
As shown in FIG. 3, this is a storage space for the mold 2 and has a three-dimensional structure substantially similar to a conventional mold storage slide rack, and is vertically and horizontally (laterally) moved by an outer frame 41. It is partitioned and partitioned into a number of mold storage sections 41a. Further, as shown in FIG. 5, a free roller 42 having a guide plate 42a is provided in each mold accommodating portion 41a.
Free rollers 43 having a wide width without a guide plate are arranged in a row in the front-rear direction.

Next, the air bogie 50 will be described with reference to FIGS. This air trolley 50
As shown in FIGS. 5 and 6, the carriage body 51 is configured to include a flat rectangular carriage body 51, compressed air is supplied between the carriage body 51 and the floor surface, and a slight gap is formed. It is configured to rise. Thereby, the particularly heavy mold 2 can be easily transported, and the working efficiency can be greatly improved.

As shown in FIG. 6, a free roller 54 having a guide plate 54a for guiding the flange of the mold 2 is provided on the upper surface of the bogie main body 51, corresponding to the mold accommodating portion 41a of the rack 40. And a free roller 55 having a wide width without a guide plate are arranged in the front-rear direction.
Further, on the upper surface of the bogie main body 51, as shown in FIGS. 4 and 6, a mold pushing / pulling device 56 for moving the mold 2 by pushing or pulling the mold 2 is also provided.

The die pushing / pulling device 56 is of a push-pull chain (snake chain) type. As shown in FIG. 8, a channel-type guide rail 62 with a flange is provided in the guide rail 62. A chain (push-pull chain) 63 driven by a forward / reverse rotatable motor (not shown) and a hook member 64 attached to the tip of the chain 63 are provided.

The mold 2 is moved by engaging the hooks of the hooks 64 with the metal fittings 65 fixed to the mold 2 and driving the chain 63 to which the hooks 64 are attached by a motor (not shown). It can be made to be. Further, the engagement between the hook member 64 and the metal receiving member 65 is performed by bringing the roller 66a mounted on the tip of the lot of the air cylinder 66 into contact with the hook member 64 and moving the roller 66a to the position indicated by the two-dot chain line in FIG. Can be attached and detached.

As described above, since the transfer of the mold 2 by the air carriage 50 is performed by using the mold pushing and pulling device including the free rollers 54 and 55 and the chain 63, the air carriage of the mold 2 is used. Transfer to 50 can be performed easily. In particular, even the heavy metal mold 2 can be easily transferred, and the work efficiency can be improved.

The upper surface of the carriage body 51 is shown in FIG.
As shown in FIG. 6, one side is raised, an operation panel 57 is formed on the upper side, and a steering handle 58 is provided. On the other hand, as shown in FIG.
An air pad 52 and a leg pad 53 are fixedly provided near the four corners on the lower surface of the bogie main body 51, respectively. Also,
An air compressor 60 for generating compressed air is housed in the bogie main body 51.

The air pad 52 is constituted by a diaphragm having a shape as shown in the schematic sectional view of FIG. When compressed air is supplied from an air compressor 60 through a supply port 52a as shown by an arrow in FIG.
Are ejected from a large number of small holes 52b provided on the inner periphery of the lower surface of the air pad 52 and flow out to the outside over the entire periphery between the lower surface of the air pad 52 and the floor surface. And leg pad 5
A small gap is formed between the lower surface of the base 3 and the floor, so that the bogie main body 51 floats.

As shown in FIG. 6, step portions 99 are formed on both left and right sides of the lower surface of the bogie main body 51.
The step portion is provided with a conical positioning pin 59 (see FIG. 12) facing downward. 4 to 6, reference numeral 61 denotes a sweep type cabtire cord for supplying power.

Next, the stacker 70 will be described with reference to FIGS. This stacker 70
As shown in FIG. 2, in order to store or remove the mold 2 in or out of the rack 40, the rack 40 is designated when the air bogie 50 is introduced from a predetermined standby position (the position C in FIG. 1). It travels to the position of the mold storage part 41a, and the air bogie 5
0 is a self-propelled stacker 70 that can move up and down. In addition,
The rack 40 can be easily attached to and detached from the stacker 70.

This stacker 70 is, as shown in FIG.
The stacker main body 71 has a tall gate shape. The stacker main body 71 includes two columnar portions 71 having a rectangular cross section.
a, 71b, legs 71c, 71d formed in a flange shape below these columnar portions 71a, 71b, and a ceiling portion 71 formed above these columnar portions 71a, 71b.
e.

As shown in FIG. 2, the height of the stacker 70 is substantially the same as the height of the rack 40 in which the mold 2 is stored. As shown in FIG. 3, the interval between the stacker 70 and the rack 40 is set such that the transfer of the mold 2 can be performed reliably. Specifically, the stacker 7
0 travels along guide rails 84 and 86 which will be described later.
The mold 2 is disposed at a position such that the transfer of the mold 2 can be reliably performed between the rack 0 and the rack 40.

As shown in FIG. 2, a travel driving device 72 is provided in the leg 71c, and an air compressor 73 for generating compressed air is provided in the leg 71d. Here, as shown in FIG. 9, the traveling drive device 72 is rotatably mounted on the rocking plate 79 rotatably supported on the columnar portion 71a via the bracket 78, and is rotatably mounted on the rocking plate 79. Drive roller 8 whose outer periphery is made of rubber
0, a driving geared motor 81 rotatably mounted on the rocking plate 79 together with the driving roller 80, and the driving roller 80 and the geared motor 81.
And an air cylinder 82 that presses against the floor via the air cylinder 82.

As shown in FIG. 6, an air pad 74 and a leg pad 75 are provided near four corners on the lower surface of the stacker main body 71, respectively. These air pads 7
The 4 and the leg pad 75 are configured similarly to those provided on the cart 50. The leg 7 of the stacker body 71
As shown in FIG. 6, guide rollers 76 are attached to one side surface of 1c and 71d via brackets 83, respectively. As shown in FIG. 10, the guide roller 76 is loosely fitted to the channel-shaped guide rail 84 fixed to the floor along the rack 40 (see FIG. 1) so as to be vertically slidable.

On the other hand, as shown in FIGS. 3 and 6, two guide rollers 76 are also mounted on one side surface of the ceiling portion 71e of the stacker main body 71 via a bracket 85. These guide rollers 76 are supported by brackets (indicated by two-dot chain lines in FIG. 3) fixed to the building side, and are mounted downward with channel-shaped guide rails 86.
(Shown by a two-dot chain line in FIG. 6) is loosely fitted in a vertically slidable manner.

Here, since the guide rails 84 and 86 are disposed at positions where the transfer of the mold 2 can be reliably performed between the stacker 70 and the rack 40, the stacker 70 is provided.
Just run along the guide rails 84 and 86,
The positioning between the air cart 50 and the rack 40 introduced into the stacker 70 can be easily and accurately performed.

The bracket 83 on the leg 71d side is
As shown in FIG. 6, the bracket 83 is formed wider than the bracket 83 on the leg 71c, and a positioning pin 77 is further fixed to the bracket 83 on the leg 71d. As shown in FIG. 11, the tip of the positioning pin 77 is formed in a conical shape, and can be fitted into a hole 84 a provided in the guide rail 84. Here, the positioning pin 77 is attached to the bracket 83 on the leg 71d side, but may be attached to the bracket 83 on the leg 71c side.

As described above, the hole 84a of the guide rail 84
By inserting the positioning pins 77 into the stacker 70, the positioning of the stacker 70 in the running direction can be performed. As shown in FIG. 6, two guide rails 8 are provided on the inner surfaces of the columnar portions 71a and 71b, respectively.
8, 88 are fixedly mounted, and these guide rails 8
The receiving stands 87 are provided at 8, 88 so as to face each other. The receiving table 87 can be moved up and down along these guide rails 88 while maintaining the facing position.

For this reason, as shown in FIG. 6, an elevating drive device (elevating mechanism) 89 is attached to the receiving table 87. The elevating drive device 89 includes an elevating drive motor 90.
A drive shaft 91 connected to the motor 90; a bearing 92 supporting the drive shaft 91; a sprocket 93 connected to the drive shaft 91; and a chain 94 wound around the sprocket 93. It is composed.

The chain 94 is, as shown in FIG.
It is also wound around a sprocket 97 attached to the back surface of the pedestal 87, and its ends are respectively attached to attachment portions 98a and 98a.
98b. A linear bearing 95 that engages with the guide rail 88 is provided on the back surface of the pedestal 87.
Is also fixed. As shown in FIG. 12, the cradle 87 has an L-shaped vertical cross section,
Steps 9 formed on both left and right sides of the lower surface of the air bogie 50
9, a horizontal portion (supporting portion) 87a on which is mounted.
The horizontal portion 87a is provided with a hole 87b into which the positioning pin 59 attached to the air carrier 50 can be fitted.

When the step portion 99 of the air bogie 50 is placed on the horizontal portion 87a, as shown in FIG.
0 is provided with a conical positioning pin 59 provided on a stepped portion 99 on the lower surface of the base 87, and a hole 87b provided on a horizontal portion 87a of the receiving base 87.
And the positioning of the air bogie 50 can be performed. As shown in FIG. 6, positioning cylinders 96 are provided on both sides of the upper portion of the receiving table 87, and rods (not shown) of these positioning cylinders 96 can protrude outward. A conical pin (not shown) is fixedly mounted at the rod end of each of the positioning cylinders 96.

On the other hand, a plurality of holes 71f (see FIG. 6) into which pins (not shown) of these positioning cylinders 96 can be fitted are provided on the inner surfaces on both sides of each of the columnar portions 71a and 71b. The hole 71f is provided in the mold storage portion 4 of the rack 40.
Positioning is performed so that the height position is equivalent to the height position 1a, and a plurality of positions are provided in the vertical direction so that the height position can be adjusted in a plurality of steps.

Then, the pin at the tip of the rod of each positioning cylinder 96 provided on the receiving table 87 is connected to each columnar portion 71a,
The air bogie 50 can be positioned in the vertical direction by being fitted into holes 71f provided on the inner side surfaces on both sides of the air bogie 71b. The electric power is supplied to the ceiling 71e from a suspended cabtire cord (not shown).

The mold changing system according to the present embodiment
Because of the configuration described above, the following operations,
It works. That is, for example, when storing the mold 2 in the designated mold storage section 41a of the rack 40 from the molding machine 31A designated to perform mold exchange, first supply compressed air to the air pad 52 of the air carriage 50. Air trolley 5
In a state in which the air bogie 50 is lifted, the operator operates the handle 58 to move the air bogie 50 to the delivery position of the mold 2 beside the molding machine 31A.
Is moved to stop the supply of compressed air to the air pad 52, the leg pad 53 is grounded, and the air bogie 50 is stopped.

Next, the mold pushing / pulling device 56 of the air bogie 50 is attached to the receiving member 65 of the mold 2 placed on the molding machine 31A side.
The mold 2 is transferred onto the free roller 55 of the air carriage 50 by engaging the hook 63 with the hook 64 and driving the chain 63 to which the hook 64 is attached by a motor (not shown). When the transfer of the mold 2 is completed in this way,
Again, the compressed air is supplied to the air pad 52 to
Then, the operator moves the air bogie 50 to the side of the stacker 70 stopped at a predetermined standby position C (see FIG. 1).

At this time, the compressed air is not supplied to the air pad 74 of the stacker 70, and the leg pad 75 comes into contact with the ground and is stopped. In this state, the air bogie 50 is introduced between the columnar portions 71a and 71b of the stacker 70 while preventing the positioning pins 59 of the air bogie 50 from contacting the upper surface of the horizontal portion 87a of the receiving base 87. The positioning pin 59 is moved above the hole 87b provided in the horizontal portion 87a.

Then, the compressed air of the air pad 52 of the air carriage 50 is released to lower the air carriage 50, and the positioning pins 59 of the air carriage 50 are fitted into holes 87 b provided in the horizontal portion 87 a of the receiving base 87. Thus, the air bogie 50 is placed on the horizontal portion 87a of the receiving base 87 with the air bogie 50 positioned at an accurate position. Next, compressed air is supplied from the air compressor 73 to the air pad 74 of the stacker 70 to raise the stacker main body 71 of the stacker 70, and in this state, the traveling driving device 72 of the stacker 70 is driven to move the stacker 70 to the rack 40. It travels (moves) to the position of the designated mold storage section 41a. When the stacker body 71 is raised, the guide rollers 76 provided above and below are also raised.
It does not deviate from or interfere with 4,855.

After the stacker 70 has been moved to the position of the designated mold storage section 41a in this manner, the air pad 7
The stacker body 71 is lowered by bleeding the compressed air of step 4, and the leg pad 75 is grounded to stop the stacker 70. At this time, the positioning pin 77 of the stacker 70 is
4, the stacker 70 is accurately positioned in the running direction.

Next, the motor 90 of the lifting / lowering drive unit 89 is driven to raise the air carriage 50 mounted on the receiving table 87 to the specified height of the mold storage section 40a. Is extended, and a conical pin provided at a tip end thereof is fitted into a hole 71f provided in each of the columnar portions 71a and 71b, whereby accurate positioning of the air carriage 50 in the vertical direction is performed.

Then, the mold pressing / pulling device 56 is driven to push the mold 2 to the designated position of the mold accommodating portion 41a. Thereafter, the hook component 64 of the mold pushing and pulling device 56 is pushed up by the cylinder 66, and the engagement between the hook component 64 of the mold pushing and pulling device 56 and the receiving component 65 of the mold 2 is released. It is pulled back by the driving of the mold pushing / pulling device 56 and retreats to a predetermined position.

Conversely, in order to convey the mold 2 housed in an arbitrary mold accommodating section 41a to any of the molding machines 31A to 31D, the above-described operations may be performed in the reverse order. The operation of the stacker 70 is performed automatically by a control device (not shown). Therefore, according to the mold exchanging system according to one embodiment of the present invention, the stacker 70 is configured to have the same height as the rack 40, and the air bogie 50 on which the mold 2 is placed is the stacker 70. In this state, the stacker 70 can be moved along the guide rail 84, and further, the position where the stacker 70 can transfer the mold 2 between the air carrier 50 and the mold accommodating portion 41a. To the molding machine 3
The transfer of the mold 2 when the mold 2 is transferred between the racks 40 and 1A to 31D can be performed only by the air carrier 50. This makes it possible to use the characteristics of the air bogie 50 that rails and the like are unnecessary and that the air bogie 50 can run freely.
Can be easily transported.

Thus, for example, when a molding machine having a large clamping force is used in a molding factory having a relatively large scale, or when many types of dies 2 are used in a plurality of molding machines 31A to 31D. Even if there is, there is no need to exchange the mold 2 between the mold transporting trolley and the crane as in the conventional mold exchanging system, and the working time for mold exchanging can be greatly reduced. There is an advantage that the work efficiency can be greatly improved.

Further, since there is no work of suspending and transporting the mold 2 with a crane, there is an advantage that the safety of the work can be improved. Also, the molding machines 31A to 31D
Since the transfer of the mold 2 between the rack and the rack 40 is performed by the air carriage 50, there is also an advantage that a plurality of molding machines 31A to 31D can be arranged in a free layout.

Further, since the air carrier 50 is used as a mold carrier, there is no need to provide a traveling rail.
Without interfering with other work on the floor (on a flat surface)
There is also an advantage that the safety of the work environment can be improved. If the mold 2 is not replaced, the air bogie 5
0 can be placed on the stacker 70, so that there is also an advantage that a storage space for the air cart 50 is not required and the factory space can be effectively utilized.

In the mold exchanging system according to the present embodiment, air compressors 60 and 73 are provided in the air bogie 50 and the stacker 70, respectively. However, the present invention is not limited to this. It is also possible to use by connecting with. Alternatively, an air compressor may be provided on one side to supply compressed air, and the other side may be used by connecting factory air with a hose. Further, the air truck 50 is provided with an air compressor 60 to supply compressed air, and the supply of compressed air to the stacker 70 can be performed by the air compressor 60 of the air truck 50 mounted on the stacker 70. .

Further, in the mold changing system according to the present embodiment, the stacker 70 is configured to include the travel driving device 72, but may be configured to travel manually. The stacker 70 is configured as an air-floating type, but is not limited to this.
Further, in the mold exchanging system according to the present embodiment, the mold transport cart is an air cart, but any mold transport cart that transports the mold between the molding machine and the mold storage rack may be used. A carriage traveling along a rail may be used.

In the mold exchanging system according to the present embodiment, the air bogie is provided with a mold pushing / pulling device so that the mold can be automatically transferred. However, the present invention is not limited to this, and the mold may be manually transferred.

[0064]

As described above in detail, according to the mold exchanging system of the present invention, for example, when a molding machine having a large clamping force is used in a molding factory of a relatively large scale, or when a plurality of molding machines are used. Even if a mold of the type described above is used, the air-floating mold carrier on which the mold is placed is introduced into the support of the stacker, and the support is moved up and down by the stacker elevating mechanism. Since the mold can be moved up and down to a position where the mold can be transferred between the carrier and the mold storage rack, the transfer of the mold when transferring the mold between the molding machine and the mold storage rack is performed. It can be carried out only with the air-floating mold transfer cart. This makes it possible to easily carry various kinds of dies by utilizing the characteristics of the air-floating mold transport trolley, which eliminates the need for rails and the like and allows free travel. Therefore, there is an advantage that the work time for mold replacement can be greatly reduced, and the work efficiency can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a layout of a molding machine and a mold storage warehouse in a factory to which a mold changing system according to an embodiment of the present invention is applied.

FIG. 2 is a schematic front view of the mold changing system according to the embodiment of the present invention, and is a view as viewed in the direction of arrow A in FIG.

FIG. 3 is a schematic side view of the mold changing system according to one embodiment of the present invention, and is a cross-sectional view taken along line BB of FIG. 2;

FIG. 4 is a side view schematically showing an air-floating mold transport cart of the mold changing system according to the embodiment of the present invention.

FIG. 5 is a plan view schematically showing a part of an air-floating mold carrier and a mold storage rack of the mold changing system according to the embodiment of the present invention.

FIG. 6 is a perspective view schematically showing an air-floating mold carrier and a stacker of the mold changing system according to the embodiment of the present invention.

FIG. 7 is a cross-sectional view schematically showing an air pad section in an air-floating mold transporting vehicle of the mold changing system according to one embodiment of the present invention.

FIG. 8 is a perspective view schematically showing a mold pushing / pulling device in an air-floating mold transport cart of the mold changing system according to one embodiment of the present invention.

FIG. 9 is a perspective view schematically showing a traveling drive device of the stacker of the mold changing system according to the embodiment of the present invention.

FIG. 10 is a diagram schematically showing a guide roller of a stacker of the mold changing system according to the embodiment of the present invention.

FIG. 11 is a diagram schematically showing positioning pins of a stacker of the mold changing system according to one embodiment of the present invention.

FIG. 12 is a diagram schematically showing positioning pins of an air-floating mold transport cart of the mold changing system according to the embodiment of the present invention.

FIG. 13 is a schematic diagram showing a layout of a molding machine and a mold storage warehouse in a factory to which a conventional mold changing system is applied. .

14A and 14B are schematic views for explaining the specifications of a conventional mold, wherein FIG. 14A is a front view thereof, and FIG. 14B is a side view thereof.

FIG. 15 is a schematic view showing a conventional mold storage slide rack, in which (A) is a front view and (B) is a side view.

FIG. 16 is a partial perspective view schematically illustrating a mold mounting surface of a conventional mold storage slide rack.

FIG. 17 is a perspective view schematically showing a conventional mold changing cart.

FIG. 18 is a side view schematically showing a conventional mold transporting cart.

FIG. 19 is a plan view schematically showing a conventional mold transporting cart.

[Explanation of symbols]

 31A to 31D Molding machine 40 Mold storage rack 41 Outer frame 41a Mold storage part 42, 43 Free roller 42a Guide plate 50 Air carrier (air floating mold carrier) 51 Car body 52 Air pad 52a Supply port 52b Hole 53 Leg pad 54, 55 Free roller 54a Guide plate 56 Die pushing / pulling device 58 Handle 59 Positioning pin 60 Air compressor 61 Sweep type cabtire cord for power supply 62 Guide rail 63 Chain 64 Hook 65 Receptacle 66 Air cylinder 66a Roller Reference Signs List 70 Stacker 71 Stacker main body 71a, 71b Column-shaped portion 71c, 71d Leg 71e Ceiling 72 Traveling driving device 73 Air compressor 74 Air pad 75 Leg pad 76 Guide roller 77 Positioning pin 78 Bracket 79 Rocking plate 8 0 Drive roller 81 Geared motor 82 Air cylinder 83 Bracket 84 Guide rail 84a Hole 85 Bracket 86 Guide rail 87 Receiving stand 87a Horizontal portion (support portion) 87b hole 88 Guide rail 89 Elevating drive device (elevation mechanism) 90 Motor for elevating drive 91 Drive shaft 92 Bearing 93 Sprocket 94 Chain 95 Linear bearing 97 Sprocket 98a, 98b Mounting part 99 Step part

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[Procedure amendment]

[Submission date] June 4, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction contents]

Next, the air bogie 50 will be described with reference to FIGS. This air trolley 50
As shown in FIGS. 5 and 6, is configured with a flat rectangular carriage body 51, provided on the lower surface of the carriage body 51 et
Compressed air is supplied between the pad 52 and the floor to form a slight gap, so that the bogie main body 51 is raised. Thereby, the particularly heavy mold 2 can be easily transported, and the working efficiency can be greatly improved.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0032

[Correction method] Change

[Correction contents]

As described above, since the transfer of the mold 2 by the air carriage 50 is performed by using the mold pushing and pulling device 56 including the free rollers 54 and 55 and the chain 63,
The transfer of the mold 2 to the air carrier 50 can be easily performed. In particular, even the heavy metal mold 2 can be easily transferred, and the work efficiency can be improved.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Change

[Correction contents]

As shown in FIG. 6, step portions 99 are formed on both left and right sides of the lower surface of the bogie main body 51.
The step portion is provided with a conical positioning pin 59 (see FIG. 12) facing downward. In FIG. 4 to FIG. 6, reference numeral 61 is a key catcher Bed tire cord for power supply.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0036

[Correction method] Change

[Correction contents]

Next, the stacker 70 will be described with reference to FIGS. This stacker 70
As shown in FIG. 2, in order to store or remove the mold 2 in or out of the rack 40, the rack 40 is designated when the air bogie 50 is introduced from a predetermined standby position (the position C in FIG. 1). It travels to the position of the mold storage part 41a, and the air bogie 5
0 is a self-propelled stacker 70 that can move up and down. In addition,
The air cart 50 can be easily attached to and detached from the stacker 70.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0040

[Correction method] Change

[Correction contents]

As shown in FIG. 6, an air pad 74 and a leg pad 75 are provided near four corners on the lower surface of the stacker main body 71, respectively. These air pads 7
The 4 and the leg pad 75 are configured similarly to those provided on the air bogie 50. As shown in FIG. 6, guide rollers 76 are respectively mounted on one side surfaces of the legs 71 c and 71 d of the stacker main body 71 via brackets 83. As shown in FIG. 10, the guide roller 76 is loosely fitted to the channel-shaped guide rail 84 fixed to the floor along the rack 40 (see FIG. 1) so as to be vertically slidable.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] Explanation of sign

[Correction method] Change

[Correction contents]

DESCRIPTION OF SYMBOLS 31A to 31D Molding machine 40 Mold storage rack 41 Outer frame 41a Mold storage part 42, 43 Free roller 42a Guide plate 50 Air truck (air-floating mold carrier) 51 Truck main body 52 Air pad 52a supply ports 52b hole 53 leg pads 55 free rollers 54a guide plate 56 a die push-pull device 58 handle 59 positioning pins 60 key catcher Bed tire cord 62 guide rail 63 Chen 64 hook member 65 pivot bracket 66 air cylinder of the air compressor 61 power supply 66a Roller 70 Stacker 71 Stacker main body 71a, 71b Columnar portion 71c, 71d Leg 71e Ceiling 72 Travel drive 73 Air compressor 74 Air pad 75 Leg pad 76 Guide roller 77 Positioning pin 78 Bracket 79 Rocking plate 80 drive roller 81 geared motor 82 air cylinder 83 bracket 84 guide rail 84a hole 85 bracket 86 guide rail 87 receiving stand 87a horizontal portion (supporting portion) 87b hole 88 guide rail 89 elevating driving device (elevating mechanism) 90 elevating drive Motor 91 drive shaft 92 bearing 93 sprocket 94 chain 95 linear bearing 97 sprocket 98a, 98b mounting part 99 step part

Claims (1)

[Claims] A mold storage rack for accommodating a plurality of molds used in a molding machine; an air-floating mold transport cart for conveying the molds between the mold storage rack and the molding machine. A stacker provided in parallel with the mold storage rack and running along the mold storage rack, wherein the stacker includes a support portion for supporting the air-floating mold carrier, and the support portion A mold exchanging system, comprising: an elevating mechanism for elevating and lowering the mold to a position where the mold can be transferred between the air-floating mold transporting cart and the mold storage rack.