JP2010052091A - Punching blade die and method of punching sheet-shaped product using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a punching blade die and a method of punching a sheet-shaped product using the same wherein the periodical work of removing punching chips is eliminated to enhance productivity. <P>SOLUTION: In the punching blade die, a cylindrical punching blade 2b for punching a hole is attached to a substrate 1, and the punching chips are fed to a rear surface side of the substrate 1 through the inside of a cylinder of the cylindrical punching blade 2b. A flow path 3 is arranged to carry the punching chips 33 to the outside along a longitudinal direction of a rear surface of the substrate and remove the punching chips 33. When punching the sheet-shaped product having a hole with such a die, the punching chips are temporarily held in the cylinder of the cylindrical punching blade 2b, the punching chip nearest to the flow path is pressed with a punching chip generated in a next punching process and pushed out into the flow path 3 one by one, and the punching chips 33 are carried to the outside of the die by an air flow flowing in the flow path 3 and removed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a punching blade die that can improve productivity by eliminating a periodic removal operation of punching waste, and a punching method for a sheet-like molded product using the same.

  Conventionally, when producing a molded product 31 having a predetermined shape having a large number of holes 32 as shown in FIG. 11 from various sheet materials 30 such as a synthetic resin sheet and a rubber sheet, a large number of holes are punched. It is widely practiced to perform punching using a punching blade die to which a shape cutting blade is attached. In this punching blade type, a sheet material 30 (indicated by a one-dot chain line), which is a workpiece, is pressed by a Thomson blade for forming an outer frame portion attached to a substrate and a cylindrical punching blade for punching a hole. A sheet-like molded product 31 having an outer frame shape and a large number of holes 32 is punched out.

  In this case, it is necessary to perform a removal process because a punched residue is generated. Conventionally, a blade type in which the punched residue is fed through the inside of the cylindrical punching blade to the residue portion on the back side of the substrate has been generally used. . That is, as shown in FIG. 12, a cylindrical punching blade 21 is attached to the substrate 20, and a scum reservoir 22 is formed on the back side of the substrate 20 so as to cover the scum reservoir 22. In general, a punching blade type having a structure in which the lid body 23 is attached to the surface, or a structure in which the back surface side of the substrate 20 is directly attached to the mounting surface of the press machine base without the lid body 23 being attached.

  For this reason, the removal operation of the punching waste is to stop the machine after operating for a certain period of time, remove the blade mold, open the lid 23 and remove the punching waste from the waste reservoir 22, and There is a problem that the production efficiency is lowered because the operation is stopped, and there is a problem that the operator is frequently forced to carry out the removal work of the waste.

  In addition, it is considered that a conventional punching blade mold is provided with an automatic discharge device for punching waste. However, since the press die and the discharge device are independent of each other, the press die and the sheet material are disposed above the sheet material. There is a problem in that the discharge device must be positioned on the lower side, and the size of the device increases.

On the other hand, as shown in Patent Document 1 and Patent Document 2, as an apparatus for removing debris, there is an apparatus in which a punched debris punched with a punch or a mold is automatically fed to an external debris storage box through a distribution pipe. Although it has been proposed, it cannot be directly applied to the punching blade mold, and there are problems that the structure is complicated and the size of the apparatus is increased, and that the cost is increased. .
JP-A-8-150433 JP-A-8-71997

  The present invention solves the above-described problems, prevents the punched debris from accumulating in the pool portion in the mold, eliminates the operation of removing the punched debris, and improves productivity. The present invention has been completed for the purpose of providing a punching die that can be manufactured easily and inexpensively with a structure, and a method for punching a sheet-like molded product using the same.

  The present invention made in order to solve the above-mentioned problems is for punching in which a cylindrical punching blade for punching holes is attached to a substrate, and the punching waste is fed into the back side of the substrate through the cylinder of the cylindrical punching blade. In the blade mold, a flow path is provided along the back surface of the substrate for conveying and removing the punched waste, and one end of the cylindrical punching blade is exposed to the flow path, and the vacuum is disposed on the discharge side of the flow path. A punching blade type having a device connected thereto.

  Further, it is preferable that a protruding portion for narrowing the flow path is formed on the upstream side of the flow path, and this is the invention according to claim 2.

  The vacuum device is preferably controlled so as to be intermittently driven, and this is the invention according to claim 3.

  Furthermore, when punching a sheet-like molded product having a hole using the punching blade mold as described above, the punching residue is once held in the cylinder of the cylindrical punching blade and is positioned closest to the flow path. The punching waste is pressed by the punching waste generated in the next punching process and pushed out into the flow path, and the punched waste is conveyed and removed to the outside of the mold by the air flow flowing in the flow path. According to a fourth aspect of the present invention, there is provided a punching method for a sheet-like molded product.

  In the present invention, a flow path for transporting and removing the punched debris to the outside is provided on the back surface of the substrate, and a vacuum device is connected to the discharge side of the flow path. After being sucked, it is automatically conveyed and removed from the mold through the flow path.

  Further, in the invention according to claim 2, since the protruding portion for narrowing the flow path is formed on the upstream side of the flow path, the air flow velocity in the flow path is increased by the throttling action of the protruding portion, and the punching is surely performed. The waste is transported and removed.

  Moreover, in the invention which concerns on Claim 3, since a vacuum apparatus is controlled so that it may drive intermittently, energy consumption can be reduced significantly.

  Further, in the invention according to claim 4, the punching waste is once held in the cylinder of the cylindrical punching blade, and the punching waste located closest to the flow path is pressed by the punching waste generated by the next punching step to be within the flow path. Since the punched residue is conveyed and removed to the outside of the mold by the air flow flowing through the flow path, the punched residue is smoothly and reliably fed into the flow path and removed.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an overall schematic view showing an embodiment of the present invention, FIG. 2 is a perspective view of the blade mold as viewed from the front surface side, and FIG. 3 is a perspective view of the blade mold as viewed from the back surface side. In the figure, 1 is a substrate made of laminated veneer plates, 2a is a Thomson blade for forming an outer frame portion of a product attached to the substrate 1, and 2b is a cylindrical punching blade for punching a hole. This is basically the same as this type of punching blade.

In the present invention, a flow path 3 is provided on the back surface of the substrate 1 for conveying and removing the punched waste. In addition, one end of the cylindrical cutting blade 2b is exposed to the flow path 3, and a vacuum device 5 is connected to the discharge side of the flow path 3.
In addition, the said flow path 3 can be shape | molded with high precision by cutting with an NC machine etc., for example. Further, as shown in FIG. 3, the flow path 3 is closed by a lid 4 or attached to a mounting surface of a press machine base (not shown) to form a tunnel-shaped passage. The flow path 3 is configured to generate an air flow from the left side to the right side indicated by an arrow by suction of the vacuum device 5 on the discharge side.

  As a result, the punched debris produced by punching with the cylindrical punching blade 2b for punching the hole is sequentially introduced into the flow path 3 as will be described later, and then a debris storage box (not shown) provided outside the mold. ) Will be automatically discharged. As a result, it is not necessary for the operator to stop the machine every time as in the past, so that the operator does not have to remove scum, so that the production efficiency can be greatly improved. It becomes possible to distribute time.

In addition, as shown in FIG. 4, a protrusion 7 that narrows the flow path 3 can be formed on the upstream side of the flow path 3. In this case, since the flow path 3 is narrowed by the projecting portion 7, the air flow rate is increased by the orifice effect, the punching waste conveying force is increased, and the punching waste is conveyed and removed more reliably.
If the protrusion 7 is provided on the downstream side, it is difficult to increase the flow rate to a level sufficient to draw the punched residue, and it is necessary to provide the protrusion 7 on the upstream side of the flow path 3. Further, the shape and the number of the projecting portions 7 can be arbitrarily designed according to the size of the punched residue.

Further, the vacuum device 5 may be controlled to be intermittently driven. In FIG. 1, reference numeral 6 denotes a timer-type controller, which is configured so that an arbitrary time can be selected and the vacuum device 5 can be intermittently driven.
In this case, the operating time of the vacuum device 5 can be shortened as much as possible, the power consumption can be reduced, and the production cost can be greatly reduced and energy saving measures can be greatly contributed.

Next, a procedure for punching a sheet-like molded product 31 having a large number of holes 32 by using the punching blade die of the present invention and the removal of the punched residue will be described.
FIG. 5 is a schematic explanatory view showing a press-type cutting processing machine. A punching blade die 10 of the present invention is set on a base 11 which can be moved up and down at the upper part of the processing machine. A sheet material 30 as a work is set on the mounting table 12 at the lower part of the substrate. When the base 11 is lowered, the punching blade mold 10 is lowered, and the sheet material 30 is pressed by the Thomson blade 2a for forming the outer frame portion and the cylindrical punching blade 2b for punching the hole portion, thereby obtaining a predetermined A sheet-like molded product 31 having an outer frame shape and a large number of holes 32 is punched out.

At this time, the punched debris punched by the cylindrical punching blade 2b is removed as follows. 6-10 is explanatory drawing of the principal part which shows the removal process of a punching dregs, and it demonstrates based on these figures.
First, as shown in FIG. 6, when the sheet material 30 as a workpiece is set on a mounting table (not shown), the punching blade mold is lowered. Next, as shown in FIG. 7, the sheet material 30 is pressed by a punching blade mold, an outer frame portion is formed by a Thomson blade (not shown), and the cylindrical punching blade 2 b for punching a hole is formed. Thus, a predetermined portion of the sheet material 30 is punched.
Next, as shown in FIG. 8, the punching blade die is raised and taken out as a sheet-like molded product 31 having a predetermined outer frame shape and a large number of holes 32 (not shown). The cycle ends.
At this time, the punching waste 33 generated by punching with the cylindrical punching blade 2b is punched in a state of being compressed in the punching direction at the time of punching, and thereafter, the compressive force is released and the contour shape is slightly expanded. As a result, the punching waste 33 slightly presses the inner peripheral surface within the cylinder of the cylindrical punching blade 2b, and is thereby temporarily held in the cylinder.

  Next, when a new sheet material 30 is set, the punching blade die is lowered and drilling is performed in the same manner. In this case, since the punching waste 33 generated during the previous processing is held in the cylinder of the cylindrical punching blade 2b, the new punching waste 33 is replaced with the old punching waste previously generated as shown in FIG. 33 is pushed up to the flow path side and held in the cylinder on the lower side.

Further, when the next sheet material 30 is set, the punching blade die is lowered and drilling is performed in the same manner. However, in the cylinder of the cylindrical punching blade 2b, there are two pieces generated during the previous processing. Since the punched debris 33 and 33 are held, the new punched debris 33 pushes up the two old punched debris 33 toward the flow path and is held in the cylinder on the lower side. At this time, as shown in FIG. 10, the oldest punched dregs 33 at the uppermost stage is pushed into the flow path 3, while a vacuum device (not shown) on the discharge side is placed in the flow path 3. Since the air flow from the left side to the right side indicated by the arrow flows by this suction, the punching waste 33 is carried and removed to the outside by riding on this air flow.
Although the air flow may be always present, it is preferable from the viewpoint of reducing energy consumption that the vacuum device 5 is controlled to be intermittently driven so as to flow in accordance with the timing when the punching debris 33 is pushed out.

By repeating the above steps, the punched debris 33 generated by punching with the cylindrical punching blade 2b is pushed out into the flow path 3 one by one, and smoothly and reliably conveyed and removed to the outside. .
As shown in the figure, the cylindrical punching blade 2b has a length equal to or greater than the thickness of the punching waste 33, and is configured to hold at least two punching wastes 33 in the cylinder. This is because if the length of the cylindrical punching blade 2b is extremely short, it is difficult to reliably punch the sheet material 30.

As is clear from the above description, the present invention can reliably prevent the punched debris from accumulating in the pool portion in the mold, and also removes the punched debris performed by stopping the conventional machine. As a result, productivity can be greatly increased.
Furthermore, the advantage that the mold can be manufactured easily and inexpensively with a simple structure, the advantage that the apparatus can be downsized because the punching waste is discharged in the longitudinal direction of the substrate, There are also various advantages that anyone can easily and accurately manufacture by cutting.
Therefore, the present invention contributes to the development of the industry as a punching die for solving the conventional problems and a punching method for a sheet-like molded product using the same.

1 is an overall schematic diagram showing an embodiment of the present invention. It is the perspective view which looked at the blade type from the surface side. It is the perspective view which looked at the blade type from the back side. It is a bottom view which shows other embodiment. It is a schematic explanatory drawing which shows a press-type cutting processing machine. It is explanatory drawing of the principal part which shows the removal process of a punching dregs. It is explanatory drawing of the principal part which shows the removal process of a punching dregs. It is explanatory drawing of the principal part which shows the removal process of a punching dregs. It is explanatory drawing of the principal part which shows the removal process of a punching dregs. It is explanatory drawing of the principal part which shows the removal process of a punching dregs. It is a perspective view which shows the molded article processed with the blade type | mold of this invention. It is the perspective view which looked at the blade type | mold of the prior art example from the surface side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Board | substrate 2a Thomson blade 2b for outer-frame part formation Cylindrical extraction blade for hole punching 3 Flow path 4 Lid body 5 Vum apparatus 6 Controller 7 Protrusion part 11 Base 12 Mounting base 30 Sheet material 31 Molded article 32 Hole Part 33 Punching waste

Claims (4)

  A punching blade mold in which a cylindrical punching blade for punching holes is attached to a substrate, and the punching waste is fed to the back side of the substrate through the inside of the cylindrical punching blade. A punching blade type characterized in that a flow path for conveying / removing to the outside is provided, one end of the cylindrical punching blade faces the flow path, and a vacuum device is connected to the discharge side of the flow path .   The punching blade mold according to claim 1, wherein a protrusion that narrows the flow path is formed on the upstream side of the flow path.   The punching blade mold according to claim 1 or 2, wherein the vacuum device is controlled to intermittently drive. When punching a sheet-like molded product having a hole using the punching blade die according to any one of claims 1 to 3, the punching residue is temporarily held in the cylinder of the cylindrical punching blade, The punching waste located on the road side is pressed with the punching waste generated in the next punching process and pushed into the flow path, and the punching waste is conveyed and removed to the outside of the mold by the air flow flowing in this flow path. A stamping method for a sheet-like molded product characterized by the above.

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