JP2018103236A - Scrap chute - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scrap chute that can prevent scrap from sticking even when an inclination angle is low and can reliably discharge scrap.SOLUTION: A scrap chute 13 receives falling scrap 12 and discharges the scrap to the outside of a press die 1. A slide surface 15a on which the scrap 12 of the scrap chute 13 slides is constituted of an embossed plate 18 with a plurality of projections 18a and has a hole part 18b formed downstream in a sliding direction of the scrap 12 relative to an apex of each of the projections 18a to jet an air stream toward the sliding direction of the scrap 12.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a scrap chute used for a press die.

Conventionally, there is known a press die that uses an upper die and a lower die each having a cutting portion, presses a metal material, a resin material, etc. sandwiched between each die, and cuts the material to a predetermined size. It has been. In this press mold, the excess portion cut from the material is called scrap. Since this scrap is an unnecessary item, it is discharged outside the mold and conveyed or accommodated.
As means for discharging scrap to the outside of the mold, a slide-like member made of a metal plate called a scrap chute is generally used. The scrap chutes are respectively disposed at the scrap discharge portions of the mold, and the scrap falling when the mold is pressed is dropped downward by its own weight.

However, when the mold height is low, a sufficient inclination angle cannot be given to the scrap chute. is there.
Therefore, a technique has been proposed in which air is ejected from below the scrap chute to convey the scrap in a floating state (see, for example, “Patent Document 1”).
Further, a technique has been proposed in which the scrap chute is shaped like a mountain to prevent the material from sticking to the scrap chute (see, for example, “Patent Document 2”).

JP 2000-61566 A JP 2004-216394 A

The materials and scrap chutes used for press dies are often made of metal that is easily rusted, and the surface is often coated with a rust inhibitor. For this reason, when the scrap adheres to the scrap chute by the rust preventive agent, there is a problem that it is difficult to reliably convey the scrap by the technique described in “Patent Document 1”.
Further, in the technique disclosed in “Patent Document 2”, since the scrap chute is mountain-shaped, it is necessary to increase the interval between the peaks in order to reliably prevent scrap sticking. For this reason, there is a problem that the scrap enters between the mountains and cannot be surely discharged.
An object of the present invention is to provide a scrap chute that solves the above-described problems and has an inclination angle that can prevent at least scrap sticking and can reliably discharge scrap.

  The invention according to claim 1 is a scrap chute for receiving a falling scrap and discharging it to the outside of a press die, wherein a sliding surface on which the scrap of the scrap chute is constituted by an emboss plate having a plurality of protrusions, Holes capable of injecting an air flow toward the scraping direction of the scrap are formed on the downstream side of the scraping direction from the apexes of the plurality of protrusions.

  According to a second aspect of the present invention, in the scrap chute according to the first aspect, the hole portion is provided in the vicinity of a raised end portion of the plurality of protrusions on the downstream side in the sliding direction of the scrap. .

  According to a third aspect of the present invention, in the scrap chute according to the first or second aspect, the scrap chute further forms a space through which an air flow can pass between the upper plate having the sliding surface and the upper plate. However, the upper plate is configured by overlapping the embossed plate on the upper surface of a porous member having a plurality of through holes, and the porous member and the embossed plate. The plurality of protrusions are disposed at positions where the through holes of the porous member and a part of the non-formed portion where the through holes are not formed are accommodated in the scrape sliding downstream side of the plurality of protrusions. It is characterized by being.

  According to a fourth aspect of the present invention, in the scrap chute according to the third aspect of the present invention, the length of the non-formed portion that is housed in the plurality of protrusions is an end of the hole portion on the upstream side in the sliding direction of the scrap. The end of the non-formed portion on the upstream side in the sliding direction of the scrap is positioned upstream in the sliding direction of the scrap, and the length of the through hole accommodated in the plurality of protrusions is longer than the length of the hole portion. It is characterized by being formed to be large.

  According to a fifth aspect of the present invention, in the scrap chute according to any one of the first to fourth aspects, the plurality of protrusions and the plurality of through holes are respectively arranged in a staggered manner. Features.

  According to the present invention, the scrap that has fallen on the scrap chute is prevented from being brought into surface contact with the sliding surface by the protrusions of the embossed plate, and is further lifted from the protrusions by the air flow that is blown out. As a result, even if rust preventive oil is applied to the scrap, it is reliably prevented from sticking to the running surface, and even if the tilt angle is small, a scrap chute that can reliably discharge scrap Can be provided.

It is the schematic which shows the state before the material cutting | disconnection of the press die used for one Embodiment of this invention. It is the schematic explaining the workpiece and scrap which are cut-formed by the press die in one Embodiment of this invention. It is the schematic which shows the state after the material cutting | disconnection of the press die used for one Embodiment of this invention. It is a schematic perspective view of the scrap chute used conventionally. It is a schematic perspective view of the scrap chute | shoot used for one Embodiment of this invention. It is a schematic perspective view explaining the upper board of the scrap chute | shoot used for one Embodiment of this invention. It is principal part sectional drawing explaining the scrap chute | shoot used for one Embodiment of this invention. (A) The top view of the embossed board used for one Embodiment of this invention (b) It is a top view of the embossed board used for the modification of one Embodiment.

FIG. 1 is a schematic view of a press die to which one embodiment of the present invention can be applied. In the figure, a press die 1 holds an upper blade 3 and a lower blade 4 for cutting a plate-shaped material 2 made of a material such as metal or resin, an upper die holder 5 for holding the upper blade 3, and a lower blade 4. The lower mold holder 6 has a support portion 7 that supports the upper mold holder 5 so as to be movable up and down with respect to the lower mold holder 6.
The press die 1 is entirely installed inside a large press device, and is configured such that the upper die holder 5 moves up and down relative to the lower die holder 6 by a pressing operation of the press device. And the material 2 supplied between the upper blade 3 and the lower blade 4 by the material supply apparatus which is not shown in figure is cut | disconnected so that it may become the workpiece 8 as shown, for example in FIG.

  As shown in FIG. 2, the workpiece 8 is formed by cutting the material 2. In FIG. 2, the material 2 that becomes unnecessary when forming the workpiece 8 is called scrap 12 (see FIG. 3). The scraps 12 are integrally formed when the workpiece 8 is formed by the upper blade 3 and the lower blade 4, and the upper die holder 5 is further lowered with respect to the lower die holder 6 after the workpiece 8 is formed. As a result, it is divided into a plurality of pieces as shown in FIG. 2 by a scrap cutter (not shown) provided in the vicinity of the lower blade 4. The scrap 12 formed by dividing is dropped downward by its own weight as shown by a two-dot chain line in FIG. 3, and dropped on a scrap chute 13 arranged in the lower mold holder 6 as shown by a solid line. Then, it is discharged to the outside of the press die 1.

  Here, the conventionally used scrap chute is a scrap chute 14 formed by bending a single metal plate as shown in FIG. 4. There is a problem that the scrap 12 sticks to the scrap chute 14 due to the rusting agent. This is more noticeable as the slope angle of the scrap chute becomes gentler.

  In order to solve the above-described problems, the present invention uses a scrap chute 13 shown in FIG. The scrap chute 13 includes an upper plate 15 having a sliding surface 15a on which the dropped scrap 12 slides, and a support member 16 that supports the upper plate 15. The support member 16 has a box shape made of a sheet metal having an open upper surface, and a compressor (not shown) provided in a factory in which the press mold 1 is provided in the inner space of the support member 16 from the press mold 1. The compressed air to be sent is branched and sent.

As shown in FIG. 6, the upper plate 15 is formed by bending both side edges 17 a, 17 a upward as in the conventional scrap chute 14 and has a plurality of through holes 17 b, both sides The embossing plate 18 is provided so as to be fitted between the edges 17a and 17a so as to cover the upper surface of the porous member 17 and has a plurality of protrusions 18a. The protrusion 18a has an elliptical shape extending in the scrap conveyance direction, and the distance from the bulge start site to the apex on the upstream side is the same as the distance from the bulge start site on the downstream side to the apex, or the bulge start on the upstream side The distance from the part to the apex is formed so as to be longer than the distance from the downstream bulge start part to the apex.
The embossing plate 18 is formed such that each protrusion 18a formed so as to protrude on the surface thereof corresponds to each through-hole 17b located below, and in the vicinity of the downstream end of each protrusion 18a in the scrap conveyance direction Are respectively formed with holes 18b communicating with the corresponding through holes 17b.

Here, the relationship between the through hole 17b formed in the porous plate 17 and the protrusion 18a and the hole 18b formed in the embossed plate 18 will be described.
FIG. 7 shows a sectional side view of the main part of the scrap chute 13. As shown in FIGS. 6 and 7, each hole 18b formed in the embossed plate 18 has a circular shape or an elliptical shape, and one end portion of the diameter A is shown by a two-dot chain line in FIG. The projection 18a occupies substantially the same position as the bulge start site, and the other end is formed so as to occupy a position lower than the peak of the projection 18a on the downstream side in the scrap conveyance direction.
Since the hole 18b is formed at a position lower than the apex of the protrusion 18a in this manner, dust such as dust and dust is prevented from entering the hole 18b and the sliding scrap 12 is caught. Is prevented. Further, the hole 18b is provided in the vicinity of the end of each protrusion 18a on the downstream side in the scrap conveyance direction, so that the air flow can be reliably ejected toward the downstream side in the scrap conveyance direction. The air flow ejected toward the downstream side in the scrap conveyance direction collides with the protrusion 18a located on the downstream side, and changes its direction obliquely upward with respect to the scrap conveyance direction.

  From the above-described configuration, the compressed air sent through the inside of the support member 16 is ejected from each hole 18b toward the downstream side in the scrap conveying direction through each through hole 17b as shown by an arrow in FIG. Is done. The scrap 12 falling on the scrap chute 13 is prevented from being brought into surface contact with the upper plate 15 by the projections 18a of the embossing plate 18, and further, from the projections 18a to the obliquely upstream and downstream side in the scrap conveying direction by the jetted air flow. It is lifted up. Thereby, even if rust preventive oil is applied to the scrap 12, it is reliably prevented from sticking to the upper plate 15, and the scrap 12 can be reliably discharged even when the inclination angle is small. A scrap chute 13 can be provided.

  In the above-described configuration, as shown in FIG. 7, the plurality of protrusions 18 a are formed in the interior of the porous member 17 on the downstream side in the scrap conveyance direction with a part 17 c of the non-formed part where the through hole 17 b is not formed. It is formed so that it may be in a position to be housed. With this configuration, the compressed air that has flowed through the support member 16 comes into contact with a part 17c of the non-formed part that forms the end of the through hole 17b that protrudes into the protrusion 18a. Since the direction is changed to 18b, the compressed air can be stably ejected toward the downstream side in the sliding direction of the scrap.

  Further, in the above-described configuration, the protrusion amount that the non-formed portion 17c protrudes toward the inside of the protrusion 18a, in other words, the length B stored inside the protrusion 18a is the scrap conveyance direction of the hole 18b. The upstream end of the non-formed portion 17c in the sliding direction of the scrap is positioned upstream of the upstream side of the scrap conveyance direction, that is, the hole 18b is the downstream end of the protrusion 18a in the scrap conveyance direction as in the present embodiment. When provided in the vicinity, the protruding amount B of the non-formed portion 17c is larger than the length A of the hole 18b, and the length D of the through hole 17b accommodated inside the protrusion 18a is the length A of the hole 18b. It is formed to be larger. With this configuration, the size D of the inlet for allowing the compressed air flowing through the support member 16 to enter the protrusion 18a can be made larger than the diameter A of the hole 18b. The flow rate of the air flow is increased. Thereby, since the force which blows off the scrap 12 is increased, the discharge of the scrap 12 can be further facilitated. Further, since the protruding amount B of the non-formed portion 17c is longer than the length A of the hole portion 18b, the compressed air that has flowed through the support member 16 reliably contacts the non-formed portion 17c to the hole portion 18b. Therefore, the compressed air can be reliably ejected as an air flow toward the downstream side in the scrap conveyance direction.

In the embodiment described above, as the embossed plate constituting the upper plate 15, the embossed plate 18 having the protrusions 18 a aligned and the holes 18 b formed in the protrusions 18 a as shown in FIG. 8A is used. . However, instead of this, as shown in FIG. 8B, an emboss plate 19 in which the protrusions 19a and the holes 19b formed in the protrusions 19a are arranged in a staggered manner may be used.
By using the emboss plate 19, the air flow blown out from the hole 19b provided on the upstream side in the scrap conveyance direction passes between the two protrusions 19a provided on the downstream side in the scrap conveyance direction. Guided by the protrusion 19a. For this reason, the flow direction of the air flow blown from the hole portion 19b of the emboss plate 19 is more determined than the flow direction of the air flow blown from the hole portion 18b of the emboss plate 18, and the power is increased. Can be further improved.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the specific embodiments described above, and is described in the claims unless specifically limited by the above description. Various modifications and changes can be made within the scope of the present invention. The effects described in the embodiments of the present invention are only the most preferable effects resulting from the present invention, and the effects of the present invention are not limited to those described in the embodiments of the present invention. .

DESCRIPTION OF SYMBOLS 1 ... Press die main body, 12 ... Scrap, 13 ... Scrap chute, 15 ... Upper plate, 15a ... Sliding surface, 16 ... Support member, 17 ... Porous member , 17b ... through hole, 18, 19 ... embossed plate, 18a, 19a ... projection, 18b, 19b ... hole, 18c ... part of non-formed part

Claims (5)

In scrap chute that receives falling scrap and discharges it outside the press die,
A sliding surface on which the scrap of the scrap chute slides is configured by an embossed plate having a plurality of protrusions, and an air flow is provided downstream of the top of the plurality of protrusions in the sliding direction of the scrap in the sliding direction of the scrap. A scrap chute characterized in that a hole that can be ejected is formed. The scrap chute according to claim 1,
The scrap chute characterized in that the hole is provided in the vicinity of a raised end of the plurality of protrusions on the downstream side in the sliding direction of the scrap. The scrap chute according to claim 1 or 2,
The scrap chute includes an upper plate having the sliding surface, and a support member that supports the upper plate while forming a space through which airflow can pass between the upper plate and the upper plate. The embossed plate is overlaid on the upper surface of a porous member having a through-hole, and the porous member and the embossed plate have the plurality of protrusions formed by the through-hole and the through-hole of the porous member. A scrap chute characterized in that a part of a non-formed portion that is not formed is disposed at a position where the plurality of protrusions are accommodated in a downstream side in the sliding direction of the scrap. The scrap chute according to claim 3,
The length of the non-formation part accommodated in the plurality of projections is such that the end of the non-formation part upstream in the sliding direction of the scrap is more than the end part of the hole in the sliding direction upstream of the scrap. A scrap chute, which is located upstream in the sliding direction of scrap and is formed such that a length of the through hole accommodated in the plurality of protrusions is larger than a length of the hole portion. In the scrap chute according to any one of claims 1 to 4,
The scrap chute characterized in that the plurality of protrusions and the plurality of through holes are respectively arranged in a staggered manner.

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