JPH06697U - Foam punching device - Google Patents

Abstract

(57) [Summary] [Purpose] It is not necessary to place a buffer plate on the surface of the foam for punching or to remove it from the surface of the foam after punching, and to buffer at an appropriate time. An object of the present invention is to provide a foam punching device capable of easily changing the position of a plate or exchanging a buffer plate. A pressing device 10 having an upper plate 18 and a lower plate 20 facing each other, and a Thomson die 12 arranged on the surface of the lower plate 20 with the cutting edge on which the foam for punching is placed facing the upper plate 18. In the foam punching device having the punching foam and the buffer plate 14 disposed between the upper plate 18, a material for magnetically attracting the lower plate side surface of the upper plate 18 and the buffer plate 14 back side to each other. The buffer plate 14 is detachably attached to the lower plate side surface of the upper plate 18 by magnetic attraction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a foam punching device, and more particularly to a device for punching a foam into a predetermined size and shape with a Thomson blade.

[0002]

[Prior art]

 A conventional punching device for the foam is shown in FIG. The punching device is such that a punching foam F such as urethane foam is placed on the blade 34 tip of a Thomson die 32 arranged on the surface of the lower plate 30 of the press machine, and the polypropylene foam F is punched on the polypropylene foam F. A cushioning plate 36 made of, for example, is placed, and in that state, the lower platen 30 is raised toward the upper platen 38 and the tip of the Thomson blade 34 is pressed against the upper platen 38 to punch out the punching foam F. Is.

The buffer plate 36 is for preventing the Thomson blade 34 from directly hitting the surface of the hard upper plate 38 and being damaged. Further, if the edge of the Thomson blade 34 always hits the same position of the buffer plate 36, the same portion will be repeatedly damaged and the life will be shortened. Therefore, the cushioning plate 36 is placed on the surface of the punching foam F by appropriately changing the direction or the position of the cushioning plate 36 so that the cutting edge of the Thomson blade 34 does not hit the same position.

However, in the foam punching device, it is necessary to place the cushioning plate on the punching foam or remove it from the surface of the foam after punching each time the foam is punched. The work was troublesome. Further, since the work of placing and removing the buffer plate is required every time, it is not possible to increase the punching cycle of the foam.

[0005]

[Problems to be solved by the device]

 Therefore, in view of the above points, the present invention does not require that the cushioning plate be placed on the surface of the foam for punching or removed from the surface of the foam after punching each time the punching of the foam is performed. (EN) Provided is a foam punching device capable of easily changing the position of the sheet or exchanging a buffer plate.

[0006]

[Means for Solving the Problems]

 This invention is composed of a pressing device having an upper plate and a lower plate which face each other, a Thomson type in which the cutting edge on which the foam for punching is placed is placed on the surface of the lower plate, and In a foam punching device having a foam and a buffer plate arranged between the upper plate, a lower plate side surface of the upper plate and a buffer plate back side are made of a material that magnetically attracts each other, and The present invention relates to a foam punching device, wherein the cushion plate is detachably attached to the lower plate surface of the upper plate.

[0007]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is a plan view of the lower plate side of the same embodiment, FIG. 3 is an enlarged partial sectional view of a buffer plate, and FIGS. It is a side view.

The foam punching device of this embodiment includes a pressing device 10, a Thomson die 12, a buffer plate 14, and a repulsion member 16.

The press device 10 is mounted on a frame (not shown) such that an upper plate 18 and a lower plate 20 that moves up and down by a hydraulic cylinder device or the like face each other. At least the surface of the upper plate 18 on the lower plate 20 side is made of iron so that the magnet sheet 22 on the back surface of the buffer plate 14, which will be described in detail later, can be attracted.

The Thomson mold 12 has Thomson blades 26 on the surface of the pedestal 24 in a grid pattern, and the pedestal 24 is arranged at a predetermined position on the surface of the lower plate 20 with the blade edge of the Thomson blade 26 facing the upper plate 18. ing. The Thomson blade 26 has a height according to the thickness of the punching foam, and is provided on the surface of the Thomson pedestal 24 at intervals and shapes according to the punching shape.

Since the Thomson die 12 is replaced when the punching shape of the foam is changed or when the Thomson blade 26 becomes bad, it is simply placed on the surface of the lower plate 20 or an adhesive tape. It is fixed to the surface of the lower plate 20 so as to be detachable. In order to quickly and accurately place the Thomson die 12 at a predetermined position on the surface of the lower board 20 when replacing the Thomson die 12, a block with magnets is previously attached to the outer periphery of the planned Thomson die arrangement area on the surface of the lower board 20. It is also possible to dispose the following positioning block and dispose the Thomson type inside the positioning block.

The buffer plate 14 is composed of a main body 28 and a magnet sheet 22 provided on the back surface thereof, and is detachably attached to the lower plate side surface of the upper plate 18 by the magnetic force of the magnet sheet 22.

The buffer plate main body 28 is made of various materials, particularly plastics, but polypropylene is most often used. The thickness of the main body 28 is generally set to about 3 to 5 mm, and the size of the main body 28 is set so that the tip of the Thomson blade 26 does not directly contact the surface of the upper plate 18 when the foam is punched. It is made larger than the department.

The magnet sheet 22 of the buffer plate is made of a plastic or rubber sheet manufactured by kneading or dispersing magnets, and a known material is used. The magnet sheet 22 is adhered to the back surface of the main body 28 with an adhesive tape or an adhesive. Instead of the magnet sheet 22, a magnetic attraction material such as an iron plate may be provided on the back surface of the buffer plate body 28, and a magnet may be embedded on the lower plate side surface of the upper plate 18.

The repulsion body 16 is composed of a block made of a high-density elastic body such as rubber or urethane elastomer, and is fixed to the four corners of the pedestal 24 outside the Thomson blade 26 with an adhesive or the like. The height of the repulsion body 16 is the height at which the repulsion body 16 is compressed between the upper board 18 and the Thomson type pedestal 20 when the lower board 20 is raised and the foaming body is punched out by the Thomson blade 26.

The repulsion member 16 prevents the Thomson die 12 from being lifted up to the upper plate 18 side together with the buffer plate 14 when expanding the upper and lower plates after punching the foam. When the Thomson die 12 is lifted up, when the foam is punched out, the edge of the Thomson blade 26 bites into the cushioning plate 14 on the surface of the upper plate 18, and an electrostatic adhesive force is generated between the punching foam and the cushioning plate 14. Caused by The buffer plate 14 is merely attracted to the surface of the upper plate 18 by magnetic force, but since it is surface attraction, it exerts a great force against the separating force in the direction orthogonal to the attraction surface. .

Next, the operation of this punching device will be described. First, as shown in FIG. 1, the buffer plate 14 is attracted and fixed to a predetermined position on the lower plate side surface of the upper plate 18 by the magnetic force of the magnet sheet 22 on the rear surface. Further, as shown in FIG. 4, a punching foam F made of urethane foam or the like is placed on the blade tip of the Thomson blade 26 of the Thomson die 12 arranged on the surface of the lower plate 20.

Then, the lower plate 20 is lifted to press the punching foam F at the tip of the Thomson blade 26 against the buffer plate 14 on the surface of the upper plate 20 as shown in FIG. The foam F is punched out by being pierced by the blade 26. At this time, the cutting edge of the Thomson blade 26 that has pierced the foam F partially cuts into the main body 28 of the buffer plate 14. Further, the repulsive members 16 at the four corners of the Thomson type pedestal 24 are compressed between the pedestal 24 and the upper mold 18, and a restoring repulsive force is generated.

Subsequently, the lower plate 20 is lowered to expand the space between the upper and lower plates as shown in FIG. At this time, the Thomson type 12 is separated from the buffer plate 14 by the restoring repulsive force of the repulsion member 16 and descends together with the lower plate 20. Then, the punched foam is removed from the Thomson mold 12.

Thereafter, another punching foam is punched in the same manner as described above. Then, after repeating the punching a suitable number of times, the cushioning plate 14 is peeled from the lower surface of the upper plate 18, the position is changed, and the lower plate surface of the upper plate 18 is magnetically attracted again to repeat the punching of the foam. When the buffer plate 14 is significantly damaged, the buffer plate 14 is peeled off from the lower surface of the upper plate 18 and the new buffer plate 14 is magnetically attracted to the lower plate surface of the upper plate 18. At this time, only the main body 28 of the buffer plate 14 may be replaced and the magnet sheet 22 may be repeatedly used.

Although the lower plate 20 is movable in the above embodiment, the invention is not limited to this, and the upper plate 18 may be movable.

[0022]

[Effect of device]

 As shown and described above, in the foam punching device of the present invention, since the buffer plate is attracted to the upper plate by magnetic force, the buffer plate is placed on the punching foam each time the foam is punched. There is no need to remove it from the foam surface after punching, which makes the work extremely efficient. Moreover, since the buffer plate is attracted to the lower plate side surface of the upper plate by magnetic attraction, it can be easily peeled off and its position freely changed. Therefore, the tip of the Thomson blade can be prevented from hitting a certain position, and the life of the buffer plate can be extended. Also, the buffer plate can be easily replaced.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the present invention.

FIG. 2 is a plan view of the lower plate side of the embodiment.

FIG. 3 is an enlarged partial cross-sectional view of a buffer plate according to the embodiment.

FIG. 4 is a side view showing a state where a foam for punching is placed when punching a foam by using the same embodiment.

FIG. 5 is a side view showing a state where the lower plate is raised when punching out the foam.

FIG. 6 is a side view showing a state where the lower platen is descended when the foamed body is punched out.

FIG. 7 is a side view showing a conventional foam punching device.

[Explanation of symbols]

 10 Pressing Device 12 Thomson Type 14 Buffer Plate 16 Repulsive Body 18 Upper Plate 20 Lower Plate 22 Magnet Sheet

Claims (2)

[Scope of utility model registration request] 1. A press device having an upper plate and a lower plate which face each other, a Thomson die in which a cutting edge on which a foam for punching is placed is placed on the surface of the lower plate, and the die for punching. In a foam punching device having a foam and a buffer plate disposed between the upper plate, the lower plate side surface of the upper plate and the buffer plate back surface side are made of a material that magnetically attracts each other, and the buffer is provided by magnetic attraction. A foam punching device characterized in that a plate is removably attached to a lower plate side surface of an upper plate. 2. A repulsion member made of an elastic material, which is compressed between the upper plate and the Thomson mold when the foam is punched, is provided outside the blade of the upper plate side surface edge of the Thomson type. Characteristic foam punching device.