JPH0442033Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a device for pasting a sheet for closing the opening of a shell mold, and more specifically, a device for pasting a sheet for closing the opening of a shell mold. This invention relates to a device for attaching a sheet to an opening such as a sprue of a mold.

[Prior art]

Generally, when performing precision casting using a shell mold, shot material is filled around the shell mold in order to back up the shell mold housed in a casting box. When filling shot material, it is necessary to cover the upper openings of the shell mold, such as the sprue or feeder, in order to prevent the shot material from entering the shell mold. Conventionally, these openings were manually closed with lids made of metal or rubber and then filled with shot material, and then the shot material was scraped off at another location, the lid was removed, and the molten metal was poured out. was being injected. For example, the applicant:
Previously, Japanese Patent Application Laid-Open No. 57-100843 describes a cap device for shell molds that can improve work efficiency by mechanizing the work of attaching the lid member in conjunction with the work of filling the shot material. is proposed.

[Problem that the invention attempts to solve]

The conventional lid members described above are individually collected manually after being filled with shot material for reuse. Such recovery work is quite troublesome and time-consuming work in the casting process where labor saving is an issue. In order to avoid such collection work, a closing sheet that dissolves during pouring is used as the lid member, the opening is poured with the lid closed, and the closing sheet is used as the lid member. One idea is to have it burnt down.

This invention was made taking these circumstances into consideration,
It is an object of the present invention to provide a sheet pasting device for a shell mold opening, which can evenly apply an adhesive to a closing sheet and stick it to a mold.

[Means for solving problems]

The device for pasting a sheet to the opening of a shell mold according to the present invention traverses above an adhesive application drum provided in an adhesive tank and pastes a closing sheet coated with adhesive onto the opening of a shell mold. The apparatus includes a sponge-like elastic pressing member that presses the sheet against the drum side when applying the adhesive and presses the sheet against the mold opening when pasting, and a spongy elastic pressing member that presses the sheet against the mold opening when applying the adhesive, and a spongy elastic pressing member that presses the sheet against the drum opening when applying the adhesive, and a spongy elastic pressing member that A suction pad is provided to suction and hold the edge of the sheet.

[Effect]

In the apparatus for applying a sheet to the opening of a shell mold according to the present invention, a closing sheet is held by a suction pad and is traversed above the drum of an adhesive tank toward the mold. At this time, the back surface of the closing sheet on the lower surface of the elastic pressing member is pressed against the drum by the elastic pressing member and travels sideways while being pressed against the surface of the drum. Therefore, the drum rotates while contacting the closing sheet, and the adhesive is uniformly applied to the back surface of the closing sheet on the lower surface of the elastic pressing member. Then, when the sheet coated with the adhesive comes into contact with the opening of the shell mold, it is pressed against the opening by the elastic pressing member and is firmly affixed.

Furthermore, since the suction pad is provided above the bottom surface of the elastic pressing member, it does not come into contact with the drum through the sheet when it traverses above the drum, so the adhesive that has permeated through the sheet will not reach the suction pad. Will not stick.

[Effect of idea]

According to the sheet pasting device for the opening of a shell mold according to the present invention, as described above, the adhesive can be evenly applied to the sheet while preventing the adhesive from adhering to the suction pad, and can be applied to the opening of the mold. can be attached reliably and efficiently. Therefore, it is possible to omit the conventional work of recovering the lid member that closes the opening of the mold.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

The apparatus for pasting a sheet to the opening of a shell mold in this embodiment is used for backing up the shell mold in a casting box and filling the casting box with shot material. In order to prevent the shot material from entering the mold through the openings, this device applies a closing sheet to the openings, and is constructed as follows.

As shown in FIG. 1, a sheet supplying unit 3 having a suction pad 2 for suctioning and holding a sheet 1 and an elastic pressing member 7 uses a drive means 6 to move between a sheet rack 4 in which sheets 1 are stacked and a mold 5 and a mold 5. An adhesive tank 8 is provided within the locus of the movement, and in the adhesive tank 8 there is a pressure contact with the elastic pressing member 7 when the sheet 1 is supplied to the mold 5. A rotatable adhesive drum 10 is provided. Therefore, when the sheet supply unit 3 moves laterally on the drum 10 toward the mold 5, the lower surface of the elastic pressing member 2a and the drum 10
The back surface of the sheet 1 located between the two is pressed by the drum 10 to which adhesive is adhered, and the drum 8 rotates as the sheet supply unit 3 moves, and the back surface of the sheet 1 located on the lower surface of the elastic pressing member 7 is pressed. The adhesive is applied evenly to the back side of the

The elastic pressing member 7 is made of soft sponge and is formed into a rectangular mat shape with a predetermined thickness. On the other hand, a total of four suction pads 2 are provided at the four lateral corners of the elastic pressing member 7, and these pads are arranged so that the adhesive does not adhere to the back surface of the portion of the sheet 1 that is suctioned by these suction pads 2. The suction pad 2 is disposed at a position above the lower surface of the elastic pressing member 7, and has a suction surface 2a formed in the shape of a suction cup, and is applied with negative pressure by a vacuum pump (not shown), so that the suction pad 2 is placed above the lower surface of the elastic pressing member 7. It is designed to suction and hold the four corner ends of 1. The suction pad 2 is attached to the rod 1 of the air cylinder 13 fixed to the holding frame 12 by the support member 11.
3a, and is driven up and down to move toward and away from paper sheets 1 stacked in a sheet rack 4. Further, the elastic pressing member 7 is fixed to the supporting member 11 via the supporting member 11a, and the lower surface of the elastic pressing member 7 is provided at a position lower than the suction surface 2a of the suction pad 2 by a predetermined height. On the other hand, an air cylinder 6 serving as a driving means is fixedly supported horizontally on a column 19 erected on a base 17. The holding frame 12 is rotatably attached to a head member 14 fixed to the rod 6a of the air cylinder 6, and is attached horizontally to the head member 14 via a support member 15 along the rod 6a. The air cylinder 16 is connected to the rod 16a of the air cylinder 16 via an arm 20. Therefore, the air cylinder 16 is configured to rotate from a vertical position shown by a solid line to a horizontal position shown by a two-dot chain line. The holding frame 12 is movable between an inner position as shown by a solid line in FIG. ing. This is to enable the sheet 1 to correspond to two different positions of the opening 5a of the mold 5. Therefore, the sheet rack 4 disposed on the base 17 can be moved along the guide member 18 so as to correspond to the sheet supply unit 3.

Furthermore, the air cylinder 6 horizontally moves the sheet from the position shown by the solid line in FIG. An adhesive tank 8 containing an adhesive adhesion drum 10 that presses into contact with the pressing member 7 is attached to the base 17 via the support member 22.
An adhesive adhesion drum 10 is erected above and immersed in a thermosetting resin adhesive solution stored in an adhesive tank 8 .

Therefore, when the sheet supply unit 3 is moved horizontally by the air cylinder 6 from the position shown by the solid line to the position shown by the dashed-dotted line, the lower surface of the elastic pressing member 7 moves while being pressed into contact with the drum 10. , the drum 10 rotates and the adhesive is always on the drum 1.
The adhesive can be uniformly applied to the back surface of the portion of the sheet 1 which is supplied around the adhesive pad 0 and held by the suction pad 2 and which is located on the lower surface of the elastic pressing member 7.

Incidentally, as shown in FIG. 3, a bush 23 having a long hole 23a formed in the axial direction is fixed to the holding frame 12 that fixedly supports the air cylinder 13. The bush 23 is the bearing 2
The shaft member 2 is pivotally connected to the head member 14 via the shaft member 4.
5 is fitted onto the outside so that it can freely slide in the axial direction. And, in the long hole 23a of the bush 23,
The lever 12a screwed onto the shaft member 25 is loosely fitted,
By tightening this lever 12a, the bush 23 can be fixed to the shaft member 25. Therefore, the holding frame 12 and thus the vacuum pad 2 can be selectively fixed in the above-mentioned two positions, the inner position or the outer position.

In the figure, reference numeral 26 denotes a case cover that is integrally fixed to the support member 15 to which the head member 14 and the air cylinder 16 are attached.

Next, the operation of the sheet pasting device to the opening of the shell mold configured as described above will be explained.

Move the suction pad 2 to the inner or outer position to match the position of the opening 5a of the mold 5,
After fixing the lever 12a at that position, stacking the sheets 1 on the sheet rack 4, and moving the sheet rack 4 to the inner or outer position corresponding to the sheet supply unit 3, the air cylinder 13
The sheet supply unit 3 is lowered as shown by the two-dot chain line, and the sheet 1 is sucked by the suction pad 2. Then, the sheet supply unit 3 is raised by the air cylinder 13.

Sheet supply unit 3 by air cylinder 6
Move it horizontally to the position indicated by the dashed line. Then, the elastic pressing member 7 presses into contact with the drum 10 while holding the sheet 1 on its lower surface, moves while rotating the drum 10, and adheres uniformly to the back surface of the sheet 1 on the lower surface of the elastic pressing member 7. agent is applied. However, at this time, since the end of the sheet 1 and the suction surface 2a of the suction pad 2 that suction-holds this end are provided at a position a predetermined amount higher than the lower surface of the elastic pressing member 7, the end of the sheet 1 is not adhered to the suction pad 2. The agent will not stick to the product.

Then, after driving the air cylinder 16 and rotating the sheet supply unit 3 by 90 degrees to the position shown by the two-dot chain line to face the mold 5, the air cylinder 13
is driven to advance the sheet supply unit 3 toward the mold 5, and the sheet 1 is brought into contact with the opening 5a of the mold 5 and pasted. At this time, the elastic pressing member 7 deforms along the shape of the opening 5a, so that the sheet 1
is pasted so as to reliably close the opening 5a without tearing, especially at the edges of the opening 5a.

Then, when the negative pressure in the suction pad 2 is released to the atmosphere and the sheet supply unit 3 is moved backward by the air cylinder 13, the vacuum pad 2 is separated from the opening 5a. Then, in order to supply the sheet 1 to the next mold 5, the sheet supply unit 3 is moved back to the rear limit position by the air cylinder 6, and then the air cylinder 16 is driven to move the sheet supply unit 3 to the position shown by the solid line. Then, the same procedure is repeated. At this time, since the sheet supply unit 3 does not move across the adhesive tank 8, no adhesive adheres to the elastic pressing member 7. Thereafter, the mold 5 with the opening 5a closed by the sheet 1
is rotated together with the casting box (not shown) to open the opening 5.
A facing upward, fill with shot material, and then press sheet 1.
After removing the upper shot material, pour the metal through the opening 5a, which is a sprue. Sheet 1 is burned away by the molten metal.

Therefore, according to the apparatus for pasting a sheet onto a shell mold, the adhesive can be evenly applied to the sheet 1 without the need for manpower, and there is no need to collect the sheet, resulting in labor savings.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of a sheet pasting device to a shell mold, Fig. 2 is a front view thereof, and Fig. 3 is a partial sectional view of the rotating part of the holding frame. It is. DESCRIPTION OF SYMBOLS 1... Sheet, 2... Adsorption pad, 5a... Opening, 7... Elastic pressing member, 8... Adhesive tank, 1
0...Drum.

Claims (1)

[Scope of Claim for Utility Model Registration] A device for attaching a closing sheet coated with adhesive to the opening of a shell mold by moving above an adhesive coating drum provided in an adhesive tank, comprising: an adhesive; a sponge-like elastic pressing member that presses the sheet against the drum side during coating and presses the sheet against the mold opening during pasting; A device for pasting a sheet to an opening of a shell mold, characterized by comprising a suction pad that suctions and holds the sheet.