JP2006159357A - Punch die, and pedestal used for punch die - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive and light punch die, and a pedestal used for the punch die capable of improving supporting strength of a cutting blade supported by the pedestal with excellent dimension stability, good handling property, and good recycling property in view of environments. <P>SOLUTION: This punch die 20 is constituted by mounting a metallic cutting blade 3 on a pedestal made of planar wood-chip mixed resin board 21 fixed by PE resin 23 using a plurality of wood chips 22 as a resin material. The wood-chip mixed resin board 21 is hardened by mixing the wood chips 22 in the PE resin 23 material in a manner that a mixture ratio of the PE resin and the wood chips 22 becomes about 3: 7 in a volume ratio. Sheets such as resin or corrugated boards are punched into a predetermined shape by the cutting blade 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a punching die used when punching a molded product into a predetermined shape from a sheet-like or flat plate-like material such as a resin sheet, or a corrugated cardboard sheet, and particularly supports a base end portion of a cutting blade. The present invention relates to a punching die capable of recycling a pedestal and a pedestal used for the punching die.

  Conventional punching dies of this type are known as shown in FIGS. 9 to 11 (see, for example, Patent Document 1).

  As such, a Thomson type (Bik type) 1 is known as a punching die for punching a sheet such as a resin sheet or a cardboard sheet into a predetermined shape.

  For example, in the thing of FIG. 9 shown as an example, the Thomson type | mold 1 is mainly comprised by attaching the cutting blade 3 to the flat base 2.

  Of these, the pedestal 2 is made of only wooden veneer plywood or synthetic resin such as ABS and acrylic resin, and the groove 2b is formed in a in-plane and outward direction by a laser cutter device or the like. Yes.

  The base 3a of the cutting blade 3 is press-fitted and embedded in the groove 2b, so that the height h of the cutting edge 3b protruding from the surface 2a of the base 2 can be finely adjusted. Yes.

  A plurality of the cutting blades 3... Are mounted on the pedestal 2 and fixed to the Thomson mold 1 by a bolt member 14 and a nut member 15 so as to be difficult to insert and remove. In addition, between these cutting blades 3 and 3, the hollow tube member 4 ... which can be elastically deformed is each filled, and the cutting | disconnection of the cut | disconnected sheet | seat is prevented.

  Next, the function and effect of this conventional Thomson type 1 will be described.

  In this conventional Thomson die 1, when the Thomson die 1 is set in a punching device and the cutting blades 3 are pressed against the sheet, the upper surface portion of the hollow tube 4 is crushed while the blade tip 3b ... Is cut into the desired shape.

  Further, like the other conventional ones shown in FIGS. 10 and 11, in order to punch the corrugated cardboard sheet 7, an annular punching blade 9 is press-fitted and attached to a flat base 8 as a base, A cushion material 10 made of two kinds of first elastic body 10a and second elastic body 10b having different hardnesses is bonded to the inside of the annular punching blade 9 using an adhesive, and the annular punching blade 9 is moved outward. What prevents deformation is also known (see, for example, Patent Document 2).

  As shown in FIG. 10, the pedestal 8 is attached to the die support 12 of the flat plate type press device 11 and then directed toward the sheet 7 of the corrugated ball placed on the receiving surface 13. By moving as shown in FIG. 11, the sheet 7 is punched into a desired shape.

The depth of biting of the cutting blade 9 into the sheet 7 is adjusted so that the cutting edge 9b of the cutting blade 9 is close to the upper surface of the receiving surface 13 when the mold support 12 is at the lowest position. . For this reason, the base part 9a of these cutting blades 9 is fixed in a state where a predetermined amount is press-fitted into the groove parts 8b and 8b formed in the pedestal 8.
Japanese Patent Laid-Open No. 5-50159 JP 2004-130461 A

  In such a conventional punching die, when the pedestal 2 is made of wooden veneer plywood, a material using a Chinese material for all layers is generally used in order to improve dimensional stability. .

  Such veneer plates such as so-called shinabenea using cinnawood for all layers are relatively expensive. For this reason, a veneer plate in which a relatively inexpensive lauan material layer is provided in the inner layer may be used. In the case where the pedestal 2 is composed of such wooden veneer plates or the like, it tends to absorb moisture, swells due to the absorbed moisture, or tends to bend or warp due to subsequent drying. .

  Therefore, a veneer plate in which the lauan material layer is provided in the inner layer cannot be used for a punching die in which high dimensional accuracy is required for the punched molded article, and the expensive Cina veneer material with relatively little warping or the like. In many cases, the production cost is increased, which is a cause of an increase in manufacturing cost.

  Furthermore, the pedestal composed of conventional veneer plywood may contain formaldehyde or the like in the adhesive that bonds the layers of the veneer plywood, which may cause environmental problems.

  Further, if the pedestal 2 is to be used again in a punching process of another shape, the recessed shape of the groove 2b when used for the previous cutting blade 3 remains in the pedestal 2, so that Even if the groove 2b is formed again so that the shaped cutting edge 3 can be mounted, sufficient support strength cannot be obtained. For this reason, there is almost no recyclability.

  It is also known that the pedestal 2 and the like are made of such a wooden pedestal 2 by using a synthetic resin material such as ABS, vinyl chloride, and acrylic resin to improve the dimensional stability.

  However, since the resin pedestal 2 and the like have a high specific gravity, the weight increases when used in a punching die for a large area punching product.

  For this reason, for example, frequently used as a base 8 that is attached to and detached from the die support 12 of the flat plate type press device 11, etc. It was difficult to say that the handling property in was good.

  Further, in order to adjust the biting depth of the cutting blade 9 into the sheet 7, the cutting edge 9 b of the cutting blade 9 is close to the upper surface of the receiving surface 13 at the position where the mold support 12 is lowered most. In addition, the base 9 a of these cutting blades 9 is set with a press-fitting dimension into the grooves 8 b and 8 b formed in the pedestal 8.

  Then, when the blade edge 3b position is distorted by use and the press-fitting dimension must be adjusted, the screwing of the bolt member 14 to the nut member 15 is loosened, and the press-fitting amount of the base portion 3a is reset. Is done.

  Thus, since the biting depth is adjusted by the press-fitting dimensions, the cutting blade 9 cannot be fixed to the groove 8b formed in the base 8 with an adhesive or the like.

  In particular, in the case of using a base 2 made of synthetic resin such as ABS, vinyl chloride, and acrylic resin having low toughness, when the fitting between the base 3a and the groove 2b is set tightly, the cutting blade 3 is When press-fitting, a crack (crack K) is generated in the peripheral edge of the groove 2b, and the support strength of the cutting blade 3 and the strength of the peripheral pedestal 2 are weakened.

  Further, in such a base 2 made of synthetic resin, if the fitting between the base portion 3a and the groove portion 2b is set loosely, the frictional force between the two members is extremely reduced, and the cutting blade 3 is likely to come off. There were also conflicting problems.

  For this reason, after loosely inserting the base 3a of the cutting blade 3 into the groove 2b, the base 3a is fixed using a fixture such as a bolt member 14 and a nut member 15 as shown in FIG. In such a case, the bolt member 14 is inserted substantially horizontally into the bolt hole penetrating between the both side surface portions 2c, 2c of the base 2, and the nut member 15 is screwed to the tip and tightened. The base portions 3a of the blades 3 are sandwiched and fixed together with both side walls located on both sides of the groove portion 2b of the base 2.

  However, in the case of using the fixing member such as the bolt member 14 and the nut member 15 as described above, the number of parts is increased, and it is necessary to manage the tightening torque of the bolt member 14 and the nut member 15. It was hard to say that the property was good.

  Therefore, the present invention is excellent in dimensional stability, inexpensive, lightweight, easy to handle, environmentally friendly and recyclable, and improves the support strength of the cutting blade supported by the pedestal. It is an object of the present invention to provide a punching die that can be made and a pedestal used for the punching die.

  In order to solve the above-mentioned problem, the invention described in claim 1 of the present invention is a punch comprising a pedestal having a flat plate shape and a cutting blade having a base end portion press fitted into a groove provided in the pedestal. In the punching die, the pedestal is characterized by a punching die constituted by a wood piece-mixed resin board obtained by solidifying a crushed wood piece with a resin.

  Further, in the present invention, the resin and the piece of wood are respectively exposed on the inner surface of the groove, and the resin and the piece of wood are inserted into the press-fitting base end portion of the cutting blade. The punching die according to claim 1 is in contact with the side surface.

  Furthermore, what is described in claim 3 comprises a wood piece mixed resin board in which the crushed wood pieces are hardened with a resin, and the resin and the wood pieces are respectively exposed from the inner surface of the wood piece mixed resin board. The pedestal used in the punching die according to claim 1 or 2, wherein each of the resin and the wooden piece can form a groove portion that contacts a side surface of the base end portion of the press-fitted cutting blade.

  According to the first aspect of the present invention, the pedestal is constituted by a flat wooden piece-mixed resin board obtained by solidifying the piece of wood with a resin material, so that the periphery of the piece of wood is covered with the resin material. It is hard to absorb moisture. For this reason, so-called warpage does not occur and the dimensional stability is good.

  Moreover, when mounting the cutting blade, for example, even if a groove portion is formed and the cutting blade is press-fitted, the toughness is improved by the wooden pieces hardened inside, so that only conventional resin materials are used. There is no possibility of generating cracks in the peripheral edge of the groove portion like the pedestal configured with

  For this reason, the fitting of this groove part and the said cutting blade can be set tightly, and a dimensional accuracy can be improved. In addition, since fixtures such as bolt members and nut members can be simplified or omitted, the number of parts and work processes can be reduced.

  In addition, since the piece of wood having a relatively small specific gravity is mixed and formed in the resin material, it can be made lighter than a pedestal made of only the resin material.

  For this reason, the handleability at the time of loading / unloading to a punching device or the like is good.

  In addition, unlike a veneer plywood, there is no need to use an adhesive between the laminated woods, so that a punching die that is environmentally friendly is provided.

  Moreover, the wood board mixed resin board constituting the pedestal is pulverized, melted and hardened again, so that it can be reused as a new pedestal and has good recyclability, and as a raw material for the crushed wood pieces If the waste material is used, the raw material cost is further reduced, and a punching die having good dimensional stability can be provided at a low cost.

  Further, according to a second aspect of the present invention, the resin and the wood piece exposed from the inner surface of the groove are in contact with the side surface of the base end portion that is press-fitted among the cutting blades, and are pressed from both sides. To increase the frictional force.

  For this reason, the support strength of the cutting blade is further increased, and the fixture can be simplified or omitted, so that the number of parts and work processes can be reduced.

  And since what was described in Claim 3 is the said wood piece mixing resin board comprised by crushing the crushed wood piece with resin, it just pulverizes as it is, and only hardens again in a flat form, It can recycle a resin board mixed with wood pieces that will become a pedestal.

  For this reason, there is almost no wasted part and the recycling efficiency is good.

Hereinafter, specific best embodiments of the present invention will be described with reference to the drawings.
In addition, the same code | symbol is attached | subjected and demonstrated about the part thru | or equivalent to the said prior art example.

  1 to 8 show a punching die 20 according to an embodiment of the present invention.

  First, the structure will be described. The punching die 20 of this embodiment is mainly composed of a flat wood piece mixed resin board 21 in which a plurality of wood pieces 22... Are solidified with PE (polyethylene) resin 23 as a resin material. A metal cutting blade 3 is mounted on the pedestal. The cutting blade 3 is used to punch a sheet of resin or cardboard into a predetermined shape.

  The wood piece-mixed resin board 21 of this embodiment has the wood pieces 22... Finely pulverized waste materials so that the mixing ratio of the resin material and the wood pieces 22 is about resin 3: wood pieces 7 in volume ratio. The PE resin 23 is mixed.

  In this embodiment, the wood piece-mixed resin board 21 is formed by inserting the heat-melted PE resin 23 mixed with the wood pieces 22... Between the rolling rollers (not shown) and pressing it from both sides with a constant pressure. By this, it is formed in a flat plate shape and is configured to be cured by cooling.

  Therefore, as shown in the enlarged view of FIG. 3 or FIG. 7, in the vicinity of the front and back surfaces 21a and 21d, the ratio of the PE resin 23 is higher than the central portion in the in-plane / outward direction, and the internal wood pieces 22 ... It is formed to be hardened so that the ratio of exposure to the side surface is low.

  As shown in FIG. 2, this wood piece mixed resin board 21 is provided with a groove portion that is recessed in the in-plane direction so as to partially penetrate between the front and back surfaces 21a, 21d by a laser cutter device (not shown). 21b is formed.

  The height h at which the cutting edge 3b protrudes from the surface 21a of the wood piece mixed resin board 21 is finely adjusted by press-fitting and embedding the base portion 3a of the cutting blade 3 in the groove portion 21b. It is possible.

  Further, in this embodiment, as shown in FIG. 1, the groove 21b is formed to have a substantially rectangular shape in plan view, and a product having a substantially rectangular shape in plan view can be punched into the groove 21b. Moreover, the cutting blade 3 formed in the shape along the rectangular outer periphery line is embed | buried and mounted | worn.

  For example, if the dimension in the thickness direction of the wood piece mixed resin board 21 is about 18 mm to 20 mm, the height h at which the cutting edge 3b of the cutting blade 3 protrudes from the surface 21a is about h = about 6.5 mm. Has been adjusted.

  Furthermore, in this embodiment, as shown in FIGS. 2 and 7, the lower end surface 3 c of the cutting blade 3 is press-fitted so as to be substantially flush with the back surface 21 d of the wood piece mixed resin board 21. .

  In this embodiment, the PE resin 23 and the plurality of pieces of wood 22 exposed from both inner side surfaces of the groove portion 21b are in contact with both side surfaces of the press-fitted base portion 3a of the cutting blade 3, The frictional force is increased by pressing from both sides.

  Then, a sponge-like member as an approximately rectangular parallelepiped elastic body (not shown) is interposed in the inner space portion of the cutting blade 3 so that the punching die 20 is roughly configured.

  Next, the operation of the punching die 20 of this embodiment will be described.

  First, the order of creating the punching die 20 will be described. In order to produce the wood piece-containing resin board 21 as the pedestal, the PE resin 23 and the wood piece 22 that are thermally melted between the rolling rollers (not shown). A mixture of and is inserted.

  In the rolling roller, the front and back surfaces 21a and 21d of the wood piece-containing resin board 21 are pressed at a constant pressure, and when the wood piece-containing resin board 21 is formed into a flat plate shape, the wood pieces 22 ... are compressed and cured. It is confined in the PE resin 23.

  In this embodiment, as shown in FIG. 3, the PE resin 23 material is applied from the periphery of the wood pieces 22 to the outside surface so that the front surface 21a and the back surface 21d of the wood piece-containing resin board 21 are smooth. It goes around along and is almost sealed. For this reason, the exposure of these pieces of wood 22 to the outside is reduced, and there is no portion that directly touches the outside air except that it is partially exposed as a dot.

  Next, the wood piece-mixed resin board 21 that has been cooled and hardened into a plate shape is partially pierced between the front and back surfaces 21a and 21d by irradiation with laser light such as a laser cutter device (not shown). The groove portion 21b that is recessed so as to leave the connecting portion is cut and formed. FIG. 4 is an enlarged cross-sectional view of the wood board mixed resin board 21 at a substantially central position in the thickness direction, and schematically shows a state in which both inner side surfaces of the groove portion 21b are cut straightly in the in-plane and outer directions during cutting. .

  Since the wooden pieces 22 are compressed and confined in the cured PE resin 23, as shown in FIG. 5, after the groove portion 21b is formed by the irradiation of the laser beam, the wood piece 22 ... It tends to bulge out toward the center of the groove 21b.

  For this reason, as shown in FIG. 6, when the base portion 3a of the cutting blade 3 is press-fitted, the swelled pieces of wood 22 are pressed against both outer side surfaces of the base portion 3a, and the sliding resistance in the press-fitting and extraction directions Is increased, the movement of the cutting blade 3 in the press-fitting and drawing-out directions is suppressed.

  Here, using the table shown in FIG. 8, the sliding frictional force in the press-fitting and drawing directions is set to A: veneer plywood, B: resin material, C: wood piece mixed resin board 21 of the present embodiment. Compare the cases.

  In FIG. 8, the lower side shows the frictional forces A1, B1, and C1 with the cutting blade 3 when measured by bringing a metal object equivalent to the cutting blade 3 into sliding contact with the flat front surface of each material. The upper side shows sliding frictional forces A2, B2, and C2 in the press-fitting and pull-out directions when the base 3a of the cutting blade 3 is press-fitted into the groove 21b.

  If the pressure contact by the bulging pieces of wood 22 is not taken into consideration, the groove 21b of the wood piece-mixed resin board 21 is merely about the veneer plywood A2 or the resin material B2 as compared with the surface. Double sliding frictional force is assumed (two-dot chain line and C (2) position), but in actual measurement, in the groove portion 21b, the wooden pieces 22 having a large sliding resistance are seen from both the left and right sides. It can be seen that since it is pressed against the cutting edge 3 and exhibits a file effect, the fit can be set tightly, the resistance is remarkably increased, and the sliding frictional force C2 in the pulling direction can be set remarkably large.

  Furthermore, since the surface of the wood piece 22 has minute irregularities, even if it is in contact with the metal cutting blade 3 with the same pressing force, the surface is larger than the smooth resin. The sliding resistance can be increased even when compared with the case where the fitting dimensions are the same and the grooves are formed in the groove formed on the resin base.

  For this reason, in this embodiment, the movement of the cutting blade 3 in the press-fitting and drawing directions is suppressed so that the cutting blade 3 is not dropped from the groove 21b as compared with the case of a resin base. Support strength can be increased.

  In addition, in this embodiment, like the wood piece ratio shown on the right side in FIG. 2, the volume ratio of the wood pieces 22 of the substantially central region in the thickness direction of the wood piece mixed resin board 21 to the PE resin 23 is thick. The size is long in the vertical direction and is configured to be substantially constant. For this reason, in this substantially center area | region, the cutting blade 3 can be supported with high frictional resistance, and the support strength of a cutting blade can further be raised.

  Further, as schematically shown in FIG. 7, the wooden pieces 22 bulge and are pressed against both outer side surfaces of the base portion 3 a, so that when a load in a tilt direction is applied to the cutting blade 3, The wooden pieces 22 ... elastically deform to absorb this load.

  For this reason, there is little possibility that the said groove part 21b will generate | occur | produce a deformation | transformation which expands a width direction dimension. Therefore, even if it is used for a long time, the sliding resistance in the press-fitting and drawing directions is not reduced, and further, the movement of the cutting blade 3 is suppressed and the possibility that the cutting edge 3b is displaced can be reduced. .

  Therefore, the height h protruding from the surface 21a is almost unchanged, and the manufacturing cost of the punched product can be reduced by reducing the number of maintenance.

  Moreover, in this embodiment, as shown in the enlarged view in FIG. 7, the shape of the wood piece-mixed resin board 21 is such that the wood pieces 22 ... are mixed into the heat-melted PE resin 23 between the rolling rollers (not shown). When the material is inserted and pressed from both sides with a constant pressure, a distribution gradient of the wooden pieces 22 occurs, and when formed into a flat plate shape, in the vicinity of the front and back surfaces 21a and 21d, the PE resin 23 The ratio is higher than the central portion in the out-of-plane direction.

  Accordingly, in FIG. 7, the base 3a is press-fitted over substantially the entire region so that the cutting edge 3 has the lower end surface 3c substantially flush with the back surface 21d of the wood chip mixed resin board 21. In the state shown in the figure, in the vicinity of the front surface 21a and 21d on both sides, the lower end surface 3c does not reach the back surface 21d of the wood chip mixed resin board 21 and is in the state of being half-pressed in the vicinity of the front surface 21a. Since the base 3a is fitted at one place and the periphery is supported at least at one place by the PE resin 23 having a predetermined hardness, the accuracy of the mounting position of the cutting blade 3 is improved. It can be mounted stably, and the amount of deviation of the blade edge 3b in the blade surface inside / outside direction can be reduced.

  Moreover, in this embodiment, the cutting blade 3 can be mounted with good dimensional accuracy at two locations in the vicinity of the front and back surfaces 21a and 21d by a resin portion distributed at a high ratio, as shown in FIG. As shown in the upper and lower enlarged views, the cutting blade 3 is mainly supported by PE resin 23 having high rigidity on the front and back surfaces 21a and 21d of the wood piece-containing resin board 21, and the board of the wood piece-containing resin board 21 is supported. It becomes difficult to tilt with respect to the surface, and the cutting edge 3 can be held in a correct posture.

  Therefore, when the cutting blade 3 is mounted, even if the groove 21b is cut and formed with high accuracy by the laser cutter device as in this embodiment, the cutting blade 3 is pressed into the inside. Since the toughness is improved by the solidified wooden pieces 22..., There is no possibility of causing cracks in the peripheral edge of the groove portion 21b as in the case of the pedestal 2 or the like made of only a conventional resin material.

  For this reason, the fitting of the groove part 21b and the said cutting blade 3 can be set tightly, and a dimensional accuracy can be improved. In addition, since the conventional fasteners such as the bolt member 14 and the nut member 15 as shown in FIG. 9 can be simplified or omitted, the number of parts and work processes can be reduced.

  Further, in this wood piece mixed resin board 21, the ratio of the PE resin 23 is higher in the vicinity of the front and back surfaces 21 a and 21 d than in the central portion in the in-plane / outside direction, and the proportion of the internal wood pieces 22. It is formed to be low.

  In this way, the wood piece-mixed resin board 21 has a flat plate shape obtained by solidifying the crushed fine wood pieces 22... Using the PE resin 23 material having fluidity. As shown in the enlarged view below, the PE resin 23 material wraps around the wood pieces 22... Along the outer surface and is substantially sealed. Therefore, in the front and back surfaces 21a and 21d having the largest area in contact with the outside air, the wooden piece 22 is not exposed to the outside directly without being exposed to the outside, except that the piece of wood 22 is partially exposed to a point. Moisture does not easily enter the interior, and the wooden pieces 22 are less likely to absorb moisture.

  Further, inside the wood piece mixed resin board 21, the circumference of each wood piece 22 is covered with the PE resin 23 material, so that it does not absorb moisture.

  Moreover, even if one piece of wood 22 absorbs moisture, if the circumference of this piece of wood 22 is covered with PE resin 23 and the mixing ratio is low (for example, about 50%), it will be mixed independently. Therefore, there is little possibility that moisture will be transmitted to other adjacent wooden pieces 22.

  Therefore, there is no possibility that warping or the like occurs due to the wood piece 22 portion absorbing moisture.

  Further, even if one piece of wood 22 absorbs moisture, the surrounding PE resin 23 suppresses the expansion and contraction of the piece of wood 22 that has absorbed the moisture, and the amount of deformation is small. It is possible to improve the dimensional stability by reducing a possibility that the wood board mixed resin board 21 is warped.

  Moreover, in this embodiment, as shown in the enlarged portion in FIG. 7, the resin portion in the wood piece mixed resin board 21 can be crimped around the cutting blade 3 on the front and back surfaces 21a and 21d. Furthermore, the possibility of moisture entering the inside can be reduced.

  Further, the pieces of wood 22... Having a lower specific gravity than the resin material are formed by being hardened in a state of being mixed in the PE resin 23 material at a predetermined ratio. It can be lighter than the pedestal used.

  For this reason, for example, frequently used as a pedestal to be attached to and detached from the die support of the flat plate type die cutter apparatus, etc., in a work environment in which movement from the stock yard and attachment / detachment are performed manually. Good handleability.

  Moreover, the PE resin 23 containing the wood pieces 22 is pulverized, melted, and hardened again, so that it can be reused as a new pedestal and has good recyclability.

  Moreover, since it is not necessary to use an adhesive containing a harmful substance such as formaldehyde between laminated woods like a veneer plywood, the punching die 20 in consideration of environmental properties is provided.

  Then, the wood pieces 22... Can be cured with the PE resin 23 to form the wood piece-mixed resin board 21, so that the raw material cost is lower than that of an expensive acrylic resin or the like. For this reason, the base 8 with favorable dimensional stability can be provided at low cost.

  Further, in this embodiment, as described above, since the wood pieces 22 are mixed and cured in the PE resin 23, a certain high toughness can be obtained, and the ABS, vinyl chloride and acrylic resin can be obtained. The pedestal 2 or the like made of a synthetic resin such as a resin is higher than the low toughness, and when the cutting blade 3 is press-fitted, the stress is absorbed by the internal wood pieces 22. And the width of the groove 21b is set so that the base 3a of the cutting blade 3 and the groove 21b can be fitted to each other. It is possible to further reduce the possibility that the base 3a of the cutting blade 3 will come off.

  Moreover, since the width direction dimension of the said groove part 21b can be set so that the base 3a of the cutting blade 3 and this groove part 21b may fit tightly, the precision of the mounting position of the said cutting blade 3 is further provided. The wood board mixed resin board 21 does not warp due to moisture absorption, and the dimensional stability is good. For this reason, for example, it is suitable for use as a punching die for products requiring high accuracy among sheet processed products manufactured by punching.

  Moreover, since the fitting between the base portion 3a of the cutting blade 3 and the groove portion 21b is set tightly, the possibility of moisture entering the inside of the wood piece mixed resin board 21 is further reduced, and the dimension is stabilized. Can be improved.

  Furthermore, since the attachment stability of the base 3a of the cutting blade 3 can be made favorable, the dimension in the thickness direction of the wood piece-mixed resin board 21 can also be set thin.

  For this reason, it is possible to reduce the weight by mixing the pieces of wood 22 and also reduce the weight by thinning the plate. For example, even if it is used as a punching die for a product with a large area, an increase in weight can be suppressed to a weight that is easy to handle. Suitable for use in a work environment in which movement from a stock yard and attachment / detachment are performed manually, such as a form frequently used as a pedestal for attachment / detachment to / from a die support of the flat plate type die cutter apparatus. It is.

  Furthermore, since the wood board mixed resin board 21 has higher toughness than a pedestal made of acrylic resin or the like, it may crack even if it is dropped during the movement from the stock yard and the loading / unloading operation. There is almost no risk of breakage.

  Thus, for example, the wood piece-mixed resin board 21 used as a pedestal that is small and requires high accuracy and the large-sized wood piece-mixed resin board 21 can be created simply by changing the area of the common wood piece-mixed resin board 21. Therefore, for example, in order to obtain a desired size, it can be processed into a desired size by a simple tool such as a thread saw.

  In addition, even after use, regardless of the size, in the same recycling process, it can be reused as a new pedestal by crushing, melting, and solidifying again, and there is almost no wasted part. Recyclability is good.

  Also, since the recycling process does not contain harmful substances such as formaldehyde, an environmentally friendly punching die is provided.

  Furthermore, in the wood piece-mixed resin board 21 of this embodiment, since the waste material can be finely pulverized as the wood pieces 22..., The raw material cost is further reduced. In this respect, the pedestal of the punching die 20 having good dimensional stability can be provided at a low cost while improving environmental performance.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention, include.

  For example, in the pedestal of the above embodiment, the wood piece mixed resin board 21 in which the wood pieces 22... Are mixed with the PE resin as the resin material 23 and hardened is used. For example, if it has PP (polypropylene) resin or a certain toughness, PET (polyethylene terephthalate) resin, ABS resin polyethylene, polyvinyl chloride, polystyrene, polypropylene, polyvinyl alcohol, methacrylic resin, petroleum resin, polyamide, poly In addition to thermoplastic resins such as vinylidene chloride, polycarbonate, polyacetal, fluororesin, and acrylic resin, thermosetting resins such as phenol resin, urea resin, unsaturated polyester resin, polyurethane, alkyd resin, melanin resin, epoxy resin, and silicon resin Other synthetic resin materials If it is suitable for recycling, it can be melted or pulverized, such as using a mixture of multiple types of PE resin or PP resin and other resin materials, etc. A combination or a mixing ratio may be used.

  Further, the mixing ratio of the wood pieces 22 to the resin material is not limited to 3: 7, but may be, for example, 1: 9 to 9: 1 or the like, or may be a mixing ratio exceeding this range. Even if it exists, what is necessary is just a wood board mixing resin board which hardens the crushed wood pieces 22 ... with resin.

  As described above, instead of the PE resin 23 of the wood piece-mixed resin board 21 of the above-described embodiment, a plurality of types of resin materials such as a mixture of PE resin and PP resin or PET resin may be mixed and used. If it can exhibit toughness, the crushed wood piece 22 may be hardened with a resin in which these resin materials are mixed with other types of rubber, aggregates, and the like. There are no particular limitations on the type of resin and the mixing ratio.

  Further, the crushed wood pieces 22 may be hardened by mixing a foaming agent with a resin material and using a foamable resin having independent or open cells. In this case, since the bubble portion has an irregular shape and comes into contact with both outer side surfaces of the base portion 3a of the cutting blade 3, the frictional force in the press-fitting and drawing directions is further increased. In addition, by increasing the ratio of the bubble portions, the weight can be further reduced, and the amount of the resin material for obtaining the wood piece-mixed resin board 21 having the same volume can be reduced, thereby suppressing an increase in manufacturing cost.

  And in the said embodiment, although the waste material is grind | pulverized and it uses as the piece of wood 22, it may not be a waste material in particular, and if it becomes a piece of wood, for example, cedar, cypress, pine, oak Of course, any wood such as plywood veneer or cork may be used as a raw material.

  Moreover, in the said embodiment, when producing the said wood piece mixing resin board 21 as a base of the said punching die 20, the said PE resin 23 and wood pieces 22 ... which were heat-melted using the rolling roller apparatus not shown in figure. By inserting the mixed material, the flat wooden piece mixed resin board 21 is formed. However, the present invention is not limited to this. For example, the PE resin 23 and the wooden pieces 22. Even if it is the wooden piece mixed resin board 21 or the like to be molded by pouring and curing the mixed material, it is sufficient that the wooden pieces 22 are solidified with a resin material.

It is a perspective view explaining the structure of the punching die of the best embodiment of this invention. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1 in the punching die according to the embodiment. FIG. 3 is an enlarged cross-sectional view at a position corresponding to a portion C in FIG. 2, illustrating a configuration in the vicinity of the front and back surfaces of the wood piece mixed resin board used in the punching die according to the embodiment. It is a longitudinal cross-sectional view near the groove part of the wood piece mixing resin board explaining a mode that the groove part was formed with the punching die of embodiment by the laser cutter apparatus. It is a longitudinal cross-sectional view of the vicinity of the groove part of the wood piece mixing resin board explaining a state that the wood piece bulges after the groove part is formed by the laser cutter device in the punching die of the embodiment. It is a longitudinal cross-sectional view near the groove part of the wood piece mixing resin board explaining a mode that the cutting blade was press-fitted into the groove part by the punching die of the embodiment. It is a schematic diagram which illustrates typically a mode that the base of a cutting blade is press-contacted by the swelled wood piece with the punching die of embodiment. It is a graph which compares the friction resistance force of the wood piece mixing resin board which is a punching type base of embodiment with the friction resistance force of the base comprised with another material. It is a perspective view explaining the whole structure of a base with the punching die of one prior art example. It is a longitudinal cross-sectional view explaining the structure of the principal part of the pedestal with the punching die of another conventional example. It is the longitudinal cross-sectional view of the principal part explaining a mode that die-cutting is performed with the punching die of the other conventional example.

Explanation of symbols

3 Cutting blade 3a Base 3b Cutting edge 20 Punching die 21 Wood piece mixed resin board (pedestal)
21a Surface 21b Groove 21d Back 22 ... Wood piece 23 (Polyethylene) PE resin (resin material)

Claims (3)

A punching die comprising a pedestal that has a flat plate shape, and a cutting blade that is press-fitted and fitted with a base end in a groove provided in the pedestal,
2. The punching die according to claim 1, wherein the pedestal is constituted by a wood piece mixed resin board obtained by solidifying a crushed wood piece with a resin.   The resin and the wood piece are respectively exposed on the inner surface of the groove, and the resin and the wood piece are in contact with a side surface of the press-fitted base end portion of the cutting blade. The punching die according to 1.   It consists of a wood piece-mixed resin board formed by solidifying the crushed wood pieces with a resin, and the resin and the wood pieces are exposed from the inner surface of the wood piece-mixed resin board, and the resin and wood pieces are press-fitted. The pedestal used for the punching die according to claim 1 or 2, wherein a groove portion in contact with a side surface of a base end portion of the cutting blade can be formed.

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