JPH1148000A - Method and device for taking out press-formed article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide such a method and device for taking out a press-formed article that has superior productivity. SOLUTION: In the tip end of the slider 14 that can enter, retreat and shift against the press base 2 equipped with a pair of upper and lower dies 6, 7; a product take-out part 4 is provided on the lower face, as is a skin feeding part 5 on the upper face. With the upper die 6 rising to the releasing position, the slider 14 extends to the take-out feeding position of the press base 2; while the product take-out part 4 on the lower face holds a press-formed article 3, the skin feeding part 5 on the upper face supplies to the upper die 6 a skin material for the next press.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing a press-formed product and an apparatus for removing the same.

[0002]

2. Description of the Related Art FIG. 15 shows a state of robots 106A and 106B around a press table 105 for producing a press-formed product 101 shown in FIG.
Among these, the robot 106A disposed on the short side of the press table 105 is for placing the skin material 101A on the resin before processing the press-formed product 101, and the two robots 106B on the long side are used. Is for taking out the press-formed product 101.

[0003] Now, in the case of processing a press-formed product 101 having an undercut 100 (a portion formed on the back side with respect to the pressing direction of the upper die in the press die 102) as shown in FIG. As shown in FIG. 17, a part of the lower press die 102 is set as an ejector pin 103 which can be moved up and down. This ejector pin 10
3 is pressed down and then press-formed 1
01 is lifted from the lower press mold 102 while being placed on the upper surface of the ejector pin 103. Here, the holder 104 attached to the tip of the robot arm 107 of the robot 106 </ b> B sandwiches the press-formed product 101 and rotates vertically, thereby removing the press-formed product 101 from the ejector pins 103.

[0004]

However, in the process of removing the press-formed product 101 as described above, a work space is required for the robot arm 107 to rotate vertically. For this reason, there is a problem as described below in the case where such a press-formed product 101 is to be pressed using a plurality of press dies. That is, the same number of robots 106A, 106
When B is used, there is a possibility that the space around the press table 105 is crowded and the robot arms 107 come into contact with each other. on the other hand,
If only a smaller number of robots 106A and 106B than the number of the press-formed products 101 are used to avoid this, the removal process will take a long time and the productivity will deteriorate.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a method for removing a press-formed product having good productivity and a device for removing the same.

[0006]

According to a first aspect of the present invention, there is provided a method for removing a press-formed product, comprising the steps of:
After ejecting from the molding die while locking the undercut portion and the hook portion by an ejector pin having a hook portion at the tip, a gripping device is positioned above the press-formed product, and the gripping device is used. When the press-formed product is sandwiched from the width direction, the press-formed product is rotated around the undercut portion in conjunction with the sandwiching operation, so that the engagement between the undercut portion and the hook portion is released. Then, the press-formed product removed from the ejector pin is carried out of the mold by a gripping device.

According to a second aspect of the present invention, there is provided an apparatus for removing a press-formed product, wherein the press-formed product partially having an undercut portion is separated from the undercut portion and the hook portion by an ejector pin having a hook portion at a tip. A device for ejecting the press-formed product from the ejector pin while releasing the engagement between the hook portion and the undercut portion after projecting from the molding die while locking the A gripping device is provided that is capable of entering and retracting between the molding dies, and that can be approached from above the press-formed product, and the gripping device approaches the press-formed product from the undercut portion side. A first clamp portion for receiving the undercut portion from the lower surface side, and a clamp by the first clamp portion approaching from the opposite side to the undercut portion. Created by characterized by comprising a second clamping portion engageable releasably with the said hook portion by rotating the press-molded product around the undercut portion.

According to a third aspect of the present invention, there is provided an apparatus for removing a press-formed product from a molding die while locking the press-formed product with an ejector pin, and then removing the press-formed product from the ejector pin. And
While being able to enter and retract between a pair of molding dies in the mold open state, a gripping device that can be gripped in proximity to the press-formed product is provided, and on the upper surface side of the gripping device,
A skin supply unit for supplying a skin material covering the surface of the press-formed product formed by the next pressing operation to the upper molding die is connected. The invention of claim 4 is the invention according to claim 2, wherein a skin material covering the surface of a press-formed product formed by the next press operation is formed on an upper surface of the gripping device. It is characterized in that a skin supply part for supplying to the mold is connected.

[0009]

According to the first and second aspects of the present invention, the undercut portion can be unlocked in conjunction with the gripping operation of the gripping device. There is no need to perform this operation, and the device space for removal can be reduced.

According to the third and fourth aspects of the present invention, the skin mounting device and the molded product removing device are conventionally provided separately, and act on the mold in two directions. According to the present invention, since it is only necessary to act on the mold from one direction, the space required for the apparatus can be reduced.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS.

FIG. 1 shows a press-formed product 3 formed by the press-formed product removal apparatus 1 of the present embodiment. The press-formed product 3 is an upper base (not shown) of a door trim attached to the inner surface of an automobile door (not shown), and has a substantially fan-shaped cross section and is elongated. Four undercut portions 3A are formed intermittently on one string of the fan. The presence of the undercut 3A makes it impossible to remove the press-formed product 3 from the press mold in one direction after the press working. Further, a skin material 8 is provided on the surface of the arc-shaped surface 3B of the press-formed product 3 which forms an arc.

FIG. 2 shows an outline of a press-formed product removing apparatus 1 for processing the above-mentioned press-formed product 3. The press table 2
And a skin supply unit 5 for supplying a skin material 8 to the press-formed product 3. The product take-out section 4 and the skin supply section 5 are attached to a front end portion of a slider 14, and the slider 14 can be moved toward and away from the press table 2. A tunnel-shaped transfer path 29 is formed below the slider 14, and the belt conveyor 9 is provided so as to pass through the transfer path 29. One end of the belt conveyor 9 is outside the transfer path 29 (in a direction away from the press table 2, right side in FIG. 2).
, While the other end is located below the product take-out section 4 in the retracted position. The belt conveyor 9 transfers the press-formed product 3 conveyed from the press table 2 by the product gripping device 15 to one end side.

The operation of the press-formed product removing apparatus 1 will be briefly described as follows. Press stand 2
When the press-formed product 3 is formed by the pair of upper and lower molds 6 and 7 arranged in the above, the upper mold 6 rises to the open position. Here, the device 1 for removing the press-formed product, which has been retracted to the retracted position shown by the solid line in FIG. 2, extends in the direction of the press table 2 and reaches the removal supply position above the lower mold 7 (FIG. At the position indicated by the two-dot chain line). Next, the product take-out section 4 takes out the press-formed product 3 and the skin supply section 5 puts the skin material 8 for the next press cycle into the upper mold 6.
To supply. Then, the press-formed product removal device 1 is contracted and displaced to the retracted position, and the press-formed product 3 carried by the product take-out section 4 is dropped on the belt conveyor 9 and carried to the outside of the transfer path 29. At this time, the skin material 8 for the next press is placed in the skin supply unit 5.
On the other hand, in the press table 2, the mold 6 holding the upper skin material 8 descends when the molten resin is discharged from the lower mold 7, and the press-formed product 3 is formed. By repeating such a press cycle, a press-formed product 3 is produced.

The press table 2 has columns 2B extending upward from the four corners of a rectangular base 2A.
C is mounted. An upper mold 6 is provided on the lower surface of the upper base 2C, and is suspended and supported by suspension columns which are moved up and down by hydraulic pressure (not shown). Although not shown, a skin material 8 is provided around the upper mold 6.
There is an air pipe for sucking and holding the air. On the other hand, as shown in FIG. 3, a lower mold 7 is provided on the upper surface of the base 2A, and four press dies 10 are juxtaposed on the mold 7 in parallel.

The press die 10 is long in the front-rear direction and has a substantially fan-shaped cross section, and one string of the fan is integrated with the lower surface. The left and right two of the four press dies 10 form a pair. In each set, the press dies 10 face the chords, and the undercut portion 3A of the press-formed product 3 described above is formed. It is arranged so that it faces the outside. Four arcuate grooves 12 for pins are formed intermittently in the arcuate surface 10A of each press mold 10, which is provided with an ejector pin 11 (see FIG. 7). The ejector pin 11 is configured to be accommodated flush with the shape of the pin groove 12. However, this ejector pin 11
Is formed as a hook portion 41 so that a gap is formed between the hook portion 41 and the pin groove 12 so as to open toward the arcuate surface 10A. An undercut portion 3A of the press-formed product 3 is formed in this gap. Also, two lifting shafts 11A are connected to the lower surface of the ejector pin 11, and a driving device (not shown) is provided below the lifting shaft 11A.
Thus, the ejector pin 11 can be moved up and down. The ejector pin 11 has a pin groove 12 during press working.
When the press-formed product 3 is to be detached, the press-formed product 3 is protruded from the arc-shaped surface 10A while being locked to the hook 41 while being housed therein and connected to the arc-shaped surface 10A flush. In addition, a resin hole 1 opening downward is formed in the arc-shaped surface 10A.
3 is provided, and a predetermined amount of molten resin serving as a raw material of the press-formed product 3 is discharged therefrom during the press working.

FIG. 4 shows a product take-out part 4 of the press-formed product removing device 1 and a skin supply part 5 located on the upper surface thereof.
Is shown. Both parts 4 and 5 are provided at the tip of a slider 14 formed in a plate shape. Slider 14
Is provided on the upper surface of a transfer path 29 to be described later, so that the press-molded-product removing device 1 can be slid and displaced between a retreat position and an unloading supply position.

The skin supply section 5 is assembled on the upper portion of the slider 14, and is formed in a frame shape having four skin material grooves 5A on which the skin material 8 is placed. This skin material groove 5A
Are provided in accordance with the positions of the four press dies 10 described above. A skin feeding unit 5 includes a skin feeding device 3 described later.
The skin material 8 is supplied by 3.

The product take-out section 4 is attached to the lower surface of the slider 14. The product take-out part 4 is provided with a plate-shaped base 19 via a lifting column 18 which can be moved up and down from the slider 14, and four product gripping devices 15 are arranged in parallel with the four press dies 10 from the base 19. Hanging. FIG.
FIG. 6 shows the product gripping device 15. The product gripping device 15 has a pair of left and right clamp portions 20 and 21 at positions where the press molded product 3 is sandwiched along the length direction thereof.
After the press-formed product 3 is positioned between them, the second clamp portion 21 is displaced close to the first clamp portion 20 so that the press-formed product 3 is sandwiched from the ejector pins 11. Remove it.

Each of the product gripping devices 15 is provided with a support board 22 along the side where the undercut portion 3A of the press-formed product 3 is formed. First clamp part 2 that can be turned up and down
0 is disposed, and a second clamp portion 21 that can be moved in and out of the horizontal direction is provided above the support board 22. The first drive section 16 is suspended and supported on the back side of the support board 22 (on the side opposite to the direction in which the second clamp section 21 protrudes). A first rod 23 is provided at the tip of the first drive unit 16.
Is extended, and an operation piece 20A of the first clamp portion 20 is rotatably assembled to a distal end portion of the first rod 23.

The first clamp portion 20 includes a base 24 provided along the length direction of the press-formed product 3 and four equally spaced portions extending from the base 24 toward the second clamp portion 21. The distance between the branches 25 is the same as the distance between the ejector pins 11. Further, a U-shaped support piece 26 is protruded at the center of the base branch 24,
The first clamp portion 20 is supported by the support board 22 by a shaft member 39 that penetrates an insertion hole formed at the distal end portion of the support piece 26 and an insertion hole formed at the distal end side of the support board 22.
Is rotatably attached to the tip of the. An operation piece 20 </ b> A protrudes from the center of the support piece 26 on the back surface side of the support board 22. The operation piece 20 </ b> A is connected to the rod 23 of the first drive unit 16 and is moved up and down so that the shaft member 39 is rotated about The branch 25 can be turned up and down.

A second drive section 17 projects from the upper surface of the support board 22 on the front side (the side where the press-formed product 3 is located). A second rod 27 is provided at the tip of the second drive unit 17 so as to come into contact with and separate from the support board 22 in the vertical direction. A substantially Y-shaped second clamp portion 21 is attached to the tip of the second rod 27 so as to hang down, and is maintained substantially parallel to the support board 22 by the operation of the second drive portion 17. Contact and separation displacement. The second clamp portion 21 has three scraping branches 28, and the tip portion is slightly bent toward the first clamp portion 20. The scraping branches 28 are configured to be alternated with the four branches 25 described above. When the product gripping device 15 sandwiches the press-formed product 3, the three scraping branches 28 It is located in the middle of four ejector pins 11 projecting from 10 (see FIG. 7).

As shown in FIG. 8, on the side of the end of the belt conveyor 9 which is close to the press table 2, a skin material supply table 30 is provided in a direction perpendicular to the belt conveyor 9. The skin material supply table 30 is provided for a plurality of transport bodies 40 on which the skin materials 8 arranged in four rows are stacked. An idle roller 31 is provided on the upper surface of the skin material supply table 30, and the transport body 40 can be sequentially pushed in the direction of the belt conveyor 9. In addition,
The empty transporter 40 can be removed by pushing it out to the slope (not shown) (provided along the side surface of the skin material supply table 30). The support frame 32 is configured to connect the upper space between the skin material supply table 30 and the end of the belt conveyor 9. At the upper part of the support frame 32, two rails 34 running from the skin material supply table 30 toward the belt conveyor 9 are provided, and the lower part of the rails 34 is supported by six legs 32A. A skin loading device 33 is slidably mounted on the rail 34.

The skin loading device 33 is for transporting the skin material 8 from the carrier 40 placed on the skin material supply table 30 to the skin supply section 5. The skin loading device 33 includes a slide plate 35 adapted to the width of the pair of rails 34, and four rows of vacuum nozzles 3 arranged on the lower surface of the slide plate 35.
6. A cylinder 37 and a vacuum nozzle 3 for raising and lowering the vacuum nozzle 36 are provided on the upper surface of the slide plate 35.
6 is provided with an air guide 38 for sucking out air. The vacuum nozzles 36 are configured to correspond to the positions of the four skin material grooves 5A provided in the skin supply section 5 on the upper surface of the slider 14, and are connected at the upper part of two rows on the left and right sides, and one for each of them. Cylinder 37
And a pair of air guides 38 sandwiching the cylinder 37
Are linked.

Next, the operation and effect of the present embodiment configured as described above will be described. In addition, since the operation of the press-formed product removing device 1 constitutes a cycle, it can be described from any place, but for convenience of description, it starts from the place where the press-formed product 3 is processed on the press table 2. .

First, on the press table 2, the upper mold 6 is lowered by hydraulic pressure, and four press-formed products 3 are formed between the pair of molds 6,7. At this time, the slider 14 is at the retracted position, and four skin materials 8 are placed in the skin material groove 5A of the skin supply unit 5. After a predetermined press time in this state, the upper mold 6 rises to the open position. Then, the slider 14 is moved to the press table 2
The product take-out part 4 and the skin supply part 5 reach the take-out supply position.

Next, the product gripping device 15 moves the press-formed product 3
The operation of removing from the ejector pin 11 will be described with reference to FIGS. Press mold 10
The press-formed product 3 formed on the upper part of the four ejector pins 11 rises, and the four ejector pins 1
It moves upward while being locked at 1 (see FIG. 9). On the other hand, in the product removal section 4 at the removal supply position, the first rod 23 is located at the uppermost end, the branch 25 faces downward, and the first clamp section 20 is in the open state. At this time, the second rod 27 is most extended and the second clamp portion 2
1 is farthest from the support board 22 (FIG. 1).
0).

Next, the lifting column 18 is lowered by driving means (not shown), and the press-formed product 3 is positioned between the pair of clamp portions 20 and 21. First drive unit 16 and second drive unit 1
7 in conjunction with the direction in which the first rod 23 extends,
The second rod 27 is displaced toward the side close to the support board 22 (see FIG. 11). When the second clamp portion 21 draws the upper end side of the press-formed product 3 toward the support board 22, the press-formed product 3 rotates while the undercut portion 3A is the center of rotation. And the hook portion 41 is released. At this time, the first clamp portion 20 has been rotated to a position where the press-formed product 3 falls off. In this way, as if the UFO catcher of the game machine sandwiches the prize, the two clamps 2
The press-formed product 3 is gripped between 0 and 21 (see FIGS. 12 and 13). As shown in FIG.
With the press-formed product 3 held by 0 and 21, the lifting column 18 is raised to the original position. At this time, in the lower mold 7, the ejector pins 11 descend, and the press mold 10 returns to a substantially flush state.

On the other hand, while the product take-out section 4 performs the above-described operation, the upper mold 6 is lowered on the upper surface of the slider 14 with respect to the skin material 8 transported by the skin supply section 5. Then, the mold 6 is raised and returned to the original position while the skin material 8 is suction-held by an air pipe (not shown).

Next, when the slider 14 slides from the take-out supply position to the retracted position, the first drive section 16 and the second drive section 17 in the product take-out section 4 operate in the opposite direction to the above-described operation, and The product gripping device 15 is displaced in the opening direction. Then, the press-formed product 3 is detached from the product gripping device 15 (see FIG. 14), dropped on the belt conveyor 9 and transported outside the transfer path 29.

At this time, the skin material 8 is charged into the skin supply unit 5 by the skin charging device 33. The operation at that time is as follows. First, the skin loading device 33
Is above the skin material supply table 30 for taking out the skin material 8. When the cylinder 37 lowers the vacuum nozzle 36 and the vacuum nozzle 36 sucks and holds the four rows of skin materials 8, the cylinder 37 moves up to a predetermined position. next,
While holding the skin material 8, the skin feeding device 33 slides toward the belt conveyor 9, and when it reaches the upper surface of the skin supply unit 5, the cylinder 37 descends and places the skin material 8 in the skin groove 5 </ b> A. Here, the skin material 8 is detached from the vacuum nozzle 36, and the preparation of the skin supply unit 5 is completed. Then, the skin loading device 33 slides above the skin material supply table 30 to suck the skin material 8 in the next cycle.

Thus, the product take-out unit 4 and the skin supply unit 5 finish preparing for the next cycle. During this time, the upper die 6 of the press table 2 is replaced with the lower die 7.
And the press-formed product 3 is created. By repeating the above cycle, the press-formed product 3 is continuously formed.

As described above, according to the present embodiment, the undercut 3A of the press-formed product 3 can be unlocked in conjunction with the gripping operation of the product gripping device 15, so that the robot arm 107 can be released as in the prior art. In addition, it is not necessary to rotate the entire holder 104, so that a space for removing the apparatus can be reduced. For this reason, since the press-formed products 3 formed in four rows in parallel can be removed from the ejector pins 11 at a time, the press-formed product removal apparatus 1 with good productivity is provided.
It can be.

Further, a skin supply section 5 and a product take-out section 4 are attached to the tip of the slider 14, and only by taking the slider 14 in and out of the press table 2, can the press-formed product 3 be taken out and the skin material 8 can be Carry in is carried out. For this reason,
Conventionally, a robot 106A for attaching the skin and a robot 106B for removing the molded product are separately provided,
As compared with the case where the mold is operated from two directions, the space required for the apparatus can be reduced.

The present invention is not limited to the above-described embodiment. For example, the following ones are also included in the technical scope of the present invention. (1) The number of press-formed products is not limited to four. It may be less or more. (2) The shape and number of the undercut portions of the press-formed product are not limited to those of the present embodiment. (3) A device having a product take-out portion and a skin supply portion at the tip end portion of the slider, such as the press-formed product removal device of the present embodiment, can be used even when a press-formed product without an undercut portion is produced. Can be used.

[Brief description of the drawings]

FIG. 1 is a perspective view of a press-formed product according to an embodiment.

FIG. 2 is a side view of an apparatus for removing a press-formed product.

FIG. 3 is a perspective view of a lower mold.

FIG. 4 is a perspective view of a tip portion when the slider is at a retracted position.

FIG. 5 is a perspective view of a product takeout unit.

FIG. 6 is a perspective view of a product holding device.

FIG. 7 is a perspective view showing a positional relationship with an ejector pin when a horizontal scraping unit of the product gripping device scrapes a press-formed product.

FIG. 8 is a perspective view when the product holding device is positioned above the press-formed product when the product is lifted by the ejector pins;

FIG. 9 is a cross-sectional view when the product gripping device starts scraping a press-formed product.

FIG. 10 is a cross-sectional view of the product gripping device during scraping of a press-formed product.

FIG. 11 is a cross-sectional view when the product gripping device scrapes and transports a press-formed product.

FIG. 12 is a sectional view when the product gripping device drops a press-formed product at a position above the belt conveyor.

FIG. 13 is a cross-sectional view of a skin loading device.

FIG. 14 is a cross-sectional view when an ejector pin rises after a press-formed product is created in a lower mold.

FIG. 15 is a perspective view showing a state around a press table in a conventional example.

FIG. 16 is a perspective view of a press-formed product in the same example.

FIG. 17 is a sectional view when the press-formed product is removed from the ejector pin in the same example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Removal method of press molded article 3 ... Press molded article 3A ... Undercut part 5 ... Skin supply part 7 ... Lower mold (molding mold) 8 ... Skin material 11 ... Ejector pin 15 ... Product gripping device ( Gripping device) 20: first clamp portion 21: second clamp portion 41: hook portion

Claims (4)

[Claims] 1. A press-formed product having an undercut portion at a part thereof is ejected from a molding die while locking the undercut portion and the hook portion by an ejector pin having a hook portion at a tip. When a gripping device is positioned above the press-formed product and the press-formed product is sandwiched from the width direction by the gripping device, the press-formed product is rotated about the undercut portion in conjunction with the sandwiching operation. A method for removing a press-formed product, comprising releasing the engagement between the undercut portion and the hook portion, and carrying out the press-formed product removed from the ejector pin out of the mold by a gripping device. 2. A press-formed product partially having an undercut portion is ejected from a molding die while locking the undercut portion and the hook portion by an ejector pin having a hook portion at a tip. An apparatus for removing the press-formed product from an ejector pin while releasing the engagement between a hook portion and an undercut portion, wherein the press-formed product can enter and retract between a pair of molding dies in an open state. A first clamping unit for providing a gripping device that can be approached from above the press-formed product, and the gripping device approaches the press-formed product from the undercut portion side and receives the undercut portion from the lower surface side; When,
A second clamp which approaches from the side opposite to the undercut portion and is capable of releasing the engagement with the hook portion by rotating a press-formed product about the undercut portion by a clamping operation with the first clamp portion; And a press-molded article removing device. 3. A device for removing a press-formed product from an ejector pin after projecting from a molding die while locking the press-formed product with an ejector pin, wherein the pair of molding products are in a mold-open state. A gripping device that can enter and retract between the molds and that can be gripped in close proximity to the press-formed product is provided. On the upper surface side of the gripping device,
An apparatus for removing a press-formed product, wherein a skin supply unit for supplying a skin material covering the surface of the press-formed product formed by the next pressing operation to an upper molding die is connected. 4. An upper surface side of the gripping device is connected to a skin supply portion for supplying a skin material covering a surface of a press-formed product formed by a next pressing operation to an upper molding die. 3. The apparatus for removing a press-formed product according to claim 2, wherein: