JP2008183667A - Punching blade die device of resin molded sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To precisely and easily attach and detach a punching blade die for a resin molded sheet. <P>SOLUTION: This punching blade die device for punching a resin molded sheet 5 comprises a punching blade die 4, in which a punching blade 7 is embedded, and a base 2, to which the punching blade is installed. A hook and loop fastener is mounted to a bottom face of the punching blade die, and a hook and loop fastener for engagement is mounted on the base opposite to the fastener, and the punching blade die 4 and the base 2 are so composed as to be engaged and disengaged via the respective hook and loop fasteners. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a resin molded product punching apparatus in which a food tray, a product storage package, or the like is molded by vacuum molding or pneumatic molding, and more specifically, a plurality of cutting blade molds mounted on a substrate are installed accurately and in one step. The present invention relates to an extraction blade type device for punching a resin molded sheet that is easily attached and detached.

  Resin molded products such as food trays and product storage packages are vacuum molded or pneumatically molded in a state in which multiple package molded products are arranged in a single large original sheet, and the molded resin molded sheets are separated from each other. It is used after being punched into a desired shape by a punching die in the process.

  In this case, when punching out the package molded body to a desired size by the punching die, it is necessary to punch after making the arrangement position dimension of each molded body formed on the raw fabric sheet and the installation positional relationship of the punching blade die exactly coincide. is there. The reason for this is that, for example, if there is a deviation of the punching position in the width dimension of the heel part of each food tray, it is not possible to ensure a uniform adhesion area in the process of bonding and sealing the periphery of the heel part of the molded body after stuffing food, This causes many problems such as leakage of the internal food and poor airtightness, causing the food to rot.

  Therefore, in order to accurately match the arrangement and the positional relationship of the individual molded bodies formed on the resin molded sheet when installing the extracted blade type block main body embedded with the extracted blade on the base as a countermeasure for the above, The horizontal installation position of the mold block main body is determined with repeated fine adjustments, and then the process proceeds to the punching process.

  As this kind of known technology, for example, in Japanese Patent Laid-Open No. 10-113897 (Patent Document 1), a replacement block and a positioning block are provided on a base plate on which the extracted blade type block main body is mounted, and these are temporarily fixed by a fixing bolt. The bolts are tightened and fixed after confirming the installation position by repeatedly performing stop adjustment. Further, in Japanese Patent No. 3613481 (Patent Document 2), the bolt mounting hole of the punching unit in which the punching blade is embedded is formed larger than the diameter of the bolt projecting on the mounting plate on the mounting side, and the mounting position of the punching unit is set. Further, in Japanese Patent Application Laid-Open No. 2004-330388 (Patent Document 3), the bolt insertion hole of the block body in which the extraction blade is embedded is set to be larger in diameter than the bolt shaft diameter, and this is used as a support plate. It is configured to fix the installation position while repeating temporary tightening and position adjustment at the time of mounting.

JP-A-10-113897 (FIG. 1) Japanese Patent No. 3613481 (FIG. 2) Japanese Patent Laying-Open No. 2004-330388 (FIG. 3)

Each of the above-described punching blade type devices has a fixing bolt in a temporarily tightened state as a means for accurately matching the arrangement size of each molded body of the resin molded sheet and the installation position of the punching blade block body in the horizontal direction. It is a structure that repeatedly performs fine adjustment of the installation position and tightens and fixes after confirmation, so the work to determine the positional relationship between the array dimensions of each molded body of the molded sheet and the extraction blade block body is troublesome, In addition, since the insertion hole is made large enough to allow fine adjustment to the diameter of the fixing bolt of the extraction blade block body, the tightening gradually loosens during repeated punching operations, and the installation position of the extraction blade die shifts laterally. As a result, there are many problems in the structure and workability of the punched molded body, as well as the need for special tools in the installation and replacement work of the punched-blade block body. In .

  Therefore, the present invention can be installed by making the arrangement size of each molded body of the resin molded sheet and the installation position of the cutting blade type block main body exactly match in one work process, and specially for exchanging the cutting blade type block main body. It is an object of the present invention to provide a punching blade type device for punching a resin molded sheet that can be carried out easily and quickly without using a tool.

  In order to achieve the above object, the present invention provides an extraction blade mold apparatus for punching a resin molded sheet 5 comprising a extraction blade mold 4 in which an extraction blade 7 is embedded and a base 2 on which the extraction blade mold is installed. A hook-and-loop fastener is mounted on the lower surface of the blade mold, and a hook-and-loop fastener for engagement is mounted on the base so as to face the hook-and-loop fastener, and the extraction blade mold 4 and the base 2 are mutually connected via the hook-and-loop fasteners. (1).

  Further, one of the extraction blade type and the hook-and-loop fastener to be mounted on the base is mounted using both the hook-type hook-and-loop fastener 15 and the loop-type hook-and-loop fastener 16, and the hook-and-loop fastener to be mounted on the other is the hook-type hook-and-loop fastener. Preferably, the engaging elements 15a and 16a of these hook-and-loop fasteners are opposed to each other and are engaged with each other when they come into surface contact with each other (claim 2).

  Further, the front end portions 15b and 16b of the engaging elements of the hook-and-loop fastener mounted on the lower surface of the punching blade mold are mounted so as to be recessed from the lower surface 11 of the punching blade mold, and the depth of the recess is set by the cutting blade. It can also be configured to be adjustable by changing the height of the contact plate 10 mounted on the bottom plate 9 below the mold.

  Furthermore, the hook-and-loop surface fasteners 15 and 16 attached to the lower surface of the punched-blade die are attached with hook-type hook-and-loop fasteners 15 along the vicinity of the inner peripheral edge of the abutting plate, and loop-type hook-and-loop fasteners 16 are mounted at substantially the center. The base 2 may be formed with a recessed groove 3 that is recessed from the top surface of the base, and a hook-type hook-and-loop fastener 15 may be attached to the bottom wall 14 of the base 2 (Claim 4).

  In the punching die apparatus for punching a resin-molded sheet comprising a punching die 34 in which a punching blade 37 is embedded and a base 32 on which the punching die is installed, a stepped recess hole is formed in the bottom wall 35 of the base. 40 is provided, and a loose fitting plate 41 that is fastened and fixed to the bottom plate 39 of the extraction blade type via a screw screw 42 is fitted into the stepped recess hole to move the extraction blade type in the horizontal and vertical directions. And a hook-and-loop fastener 16 is mounted on the loose-fitting plate 41 which is the lower surface of the extraction blade die 34, and a hook-and-loop fastener 15 for engagement is mounted on the base side so as to face the hook-and-loop fastener. The extraction blade die 34 and the base 32 can be configured to be able to engage and disengage with each other via a fastener (claim 5).

  According to the present invention, a hook-and-loop fastener is mounted on the lower surface of the punching die 4 of the punching die device for punching the resin molded sheet 5 and the hooking fastener for engagement is provided on the base 2 so as to face the hook-and-loop fastener. Since the cutting blade die 4 and the base 2 are configured to be mounted and disengaged from each other via the respective hook-and-loop fasteners, the cutting blade die 4 in the punching process of resin molded sheets such as food trays and product storage packages. Can be accurately determined in one process in accordance with the arrangement size of the molded bodies 6 on the resin molded sheet side, and can be easily and quickly performed without using a special tool even in the replacement operation of the extraction blade block main body. As a result, the finished dimensions of the punched molded body 6 are accurate without error, and the sealed packaging of the periphery of the tray flange portion is also ensured. Therefore, it is possible to eliminate corruption of food due to leakage of internal food and poor airtightness (Claim 1).

  In addition, either the hook-type surface fastener 15 or the loop-type surface fastener 16 is mounted on one of the blade type and the surface fastener to be mounted on the base, and the hook-type surface fastener is mounted on the other. 15, since the hook-and-loop fasteners are configured to engage with each other when they come into surface contact with each other, the extraction blade mold 4 can be installed reliably and quickly, and a suitable engagement state is maintained even in repeated extraction operations. (Claim 2).

  Further, the front end portions 15b and 16b of the hook fastener engaging elements 15a and 16a attached to the lower surface of the extraction blade mold are mounted so as to be recessed from the lower surface 11 of the extraction blade mold, and the depth of the depression is determined by the extraction blade. Since it is configured to be adjustable by changing the height of the abutting plate 10 below the mold, even if there is a variation in the height dimension of the hook-and-loop fastener to be used and the type of the hook-and-loop fastener or the dimensions of the engagement element The engagement / disengagement force between the blade mold 4 and the base 2 can be set to a certain degree (Claim 3).

  The hook-and-loop surface fastener 15 is mounted along the vicinity of the inner peripheral edge of the abutment plate, and the loop-type surface fastener 16 is mounted at a substantially central portion of the hook-and-loop fastener attached to the bottom surface of the punching blade mold. Is formed with a recessed groove 3 that is recessed from the upper surface of the base, and a hook-type hook-and-loop fastener 15 is mounted on the bottom wall 14 thereof, so that the installation state of the extraction blade mold 4 with respect to the base 2 can be reliably maintained. In addition, the workability of attaching and detaching the extraction blade mold 4 is improved (claim 4).

  Further, according to the present invention, a stepped recess hole 40 is provided in the base bottom wall 35 of a punching blade type apparatus for punching a resin molded sheet, and a screw screw 42 is attached to the bottom plate 39 of the punching blade type in the stepped recess hole. The loose fitting plate 41 to be tightened and fixed is inserted to limit the amount of movement of the extraction blade mold in the horizontal direction and the vertical direction, and the hook-and-loop fastener 16 is attached to the loose fitting plate 41 which is the lower surface of the extraction blade die 34. Since the hook-and-loop fastener 15 for engagement is mounted on the base side so as to face the hook-and-loop fastener so that the extraction blade die 34 and the base 32 can be engaged and disengaged with each other. Even if there is a rebound vibration generated during the punching operation, the punching die does not rise significantly from the base, and the punched molded body can be easily taken out.

  In a punching die device for punching a resin molded sheet 5 comprising a punching die 4 having a punching blade 7 embedded therein and a base 2 on which the punching die is installed, a hook-and-loop fastener is attached to the lower surface of the punching die. And by mounting a hook-and-loop fastener for engagement on the base so as to face the hook-and-loop fastener, and by configuring the extraction blade mold 4 and the base 2 so as to be able to engage and disengage with each other via the hook-and-loop fastener, The installation position of the extraction blade die can be accurately determined in one step and the installation position of the extraction blade die can be accurately determined.

  Embodiments of the present invention will be described below with reference to FIGS. The punching blade type device 1 includes a base plate 2 made of laminated plywood in a substantially square shape in plan view, and a punching blade die 4 installed on a bottom wall 14 made of synthetic resin formed below a recessed groove 3 on the base plate. The punching blade mold is detachably adjacent and disposed in accordance with the arrangement size of the molded body 6 of the resin molded sheet 5 to be described later.

  The punching blade mold 4 includes a base plate 8 having a laminated plywood plate embedded with a punching blade 7 framed in a substantially square shape corresponding to the punching shape of the molded body 6, and a synthetic resin bottom plate 9 provided below the base plate 8. An independent small block body is formed by the contact plate 10 (FIG. 3), and a space 13 (FIG. 1) is provided adjacent to the base plate 2 so that these small block bodies can be finely adjusted in the horizontal direction. Thus, the molded body 6 on the resin molded sheet 5 is punched at once. Reference numeral 4a denotes a cutout groove for inserting the protruding portion 6a of the molded body 6 of the resin molded sheet, which also serves as an insertion guide for the molded body of the resin molded sheet described later.

  Further, as shown in FIG. 3, the base 8 of the punching die 4 has an upper plate 8a, a stopper blade 8b, an intermediate holding plate 8c, a bottom plate 9 and a contact plate 10 which are integrally bonded and laminated together. An opening 12 is formed in the central portion of the contact plate 10 so as to be recessed from the lower surface 11 of the extraction blade type (the lower surface of the contact plate). A hook-and-loop fastener (common name) is formed on the bottom plate 9 facing the opening. Velcro (registered trademark) 15 and 16 are attached (FIG. 4).

  This hook-and-loop fastener is a hook-type hook-and-loop fastener 15 and a loop-type hook-and-loop fastener 16, which will be described later, and each is appropriately combined and arranged in accordance with the shape and size of the extraction blade mold 4. For example, as shown in FIG. A hook-type hook-and-loop fastener 15 is mounted along the vicinity of the inner peripheral edge of the opening 12 that is also in the vicinity of the inner peripheral edge of the contact plate 10, and a loop-type hook-and-loop fastener 16 is mounted in the vicinity of the substantially central portion thereof. On the other hand, a hook type surface fastener 15 is attached to the installation position of the extraction blade die 4 on the bottom wall 14 of the recessed groove 3 of the base 2, and the surface fasteners 15 and 16 attached to the extraction blade die face each other. ing.

  As shown in FIG. 5, the hook-type hook-and-loop fastener 15 described above has a tip portion 15b of each engaging element 15a formed in a substantially umbrella shape or a swollen shape by a synthetic resin. A thin resin fiber is knitted in a loop shape on a base fabric and has an engaging element 16a whose tip 16b is substantially looped or hooked (FIG. 6), and is in surface contact with the hook type surface fastener. Are engaged with each other.

  In this type, for example, a hook type surface fastener is disclosed in JP-A-6-133808, while a loop type surface fastener is disclosed in JP-A-2003-289910. Further, as a commercially available hook-and-loop fastener, the trade name “Majirok” (manufactured by Kuraray Co., Ltd.) is used for the hook-type hook-and-loop fastener 15, and the brand name “Magic Tape” (registered trademark) (manufactured by Kuraray Co., Ltd.) for the loop-type hook-and-loop fastener. In the present invention, the shape and configuration of the engagement element are not particularly limited as long as it is a surface fastener having a structure in which the engagement elements are engaged with each other by surface contact as described above.

  More specifically, in order to accurately determine the installation positional relationship of the extraction blade die 4 with respect to the base 2, and to maintain an appropriate fixing and holding force, and to facilitate the attachment / detachment of the extraction blade die, the mounting area of each surface fastener It is most important to appropriately set the protrusion height of each engaging element. For example, on the side of the punching die 4, as shown in FIG. It is preferable that the hook-type surface fasteners 15 having an area of about 50% are dispersedly arranged, and the loop-type surface fastener 16 having an area of about 20-50% of the opening area is attached to the substantially central portion thereof. Specifically, it is set appropriately according to the size of the punching die 4 and the thickness of the resin molded sheet 5.

  Further, it is preferable that the front end portion of the engaging element of each hook-and-loop fastener is mounted so as to be recessed from the lower surface 11 of the extraction blade mold 4, and according to experiments, the depth of the depression is the height of the hook-type hook-and-loop fastener 15. A dimension of about 20 to 40% is preferable. In other words, in this state, the surface fasteners are in an engagement degree of about 60 to 80% (FIG. 7) in a state where the lower surface of the punching die 4 is in contact with the bottom wall 14 of the base plate 2. Most suitable for installing / removing blade type. The depth of the recess is set by changing the height of the contact plate 10 in accordance with the height of the engaging element or the base fabric of the surface fastener to be employed.

  By setting as described above, it is possible to obtain an engagement force suitable for enduring repeated punching work when the punching blade mold 4 is installed on the base 2 and facilitating the attachment / detachment of the punching blade mold. In other words, the engagement force between the hook-and-loop fasteners increases as the degree of engagement between the engagement elements becomes 100% or closer to it, and much effort is required to attach and detach the extraction blade die 4. Conversely, as the degree of engagement approaches 0%, the installation of the extraction blade type becomes insufficient and the installation position is likely to be misaligned.

  Next, the operation of the present invention will be described. First, each small block body of the extraction blade mold 4 is temporarily placed adjacent to a predetermined position of the recessed groove 3 on the base. At this time, the tip portions 15b of the surface side fastener 15 on the base side are in a state of light surface contact with the surface fasteners 15 and 16 on the extraction blade mold 4 side as shown in FIG. The degree of engagement is movable in the direction, and therefore, there is also a state where a gap is generated between the bottom surface 11 of the punching die and the bottom wall 14 of the recessed groove of the base.

  Next, after the base 2 is installed on a table of a punching machine (not shown), a resin molded sheet 5 molded in advance by vacuum molding or the like is placed on the punching blade mold 4 and the pressing plate of the punching machine is gradually moved from above. When the resin molded sheet is pushed down and pressed onto the resin molded sheet, the protruding portion 6a of the molded body 6 of the resin molded sheet becomes an insertion guide into the cutout groove 4a (FIG. 1) of the punched blade mold and gradually enters the cutout groove. In this way, the installation position of the extraction blade mold 4 inevitably coincides with the array size of the molded body.

  At the same time, the tip 15b of the engaging element 15a of the hook-type hook-and-loop fastener 15 on the extraction blade die 4 side is pushed between the tips 15b of the engaging element 15a of the hook-and-loop fastener 15 on the base 2 side as shown in FIG. At the same time, the distal end portion 16b of the engaging element 16a on the loop-type surface fastener side is similarly lightly engaged as shown in FIG. 9B, and the horizontal positional relationship is first determined. Next, when the pressing plate 22 is pushed down as it is, the lower surface 11 of the punching blade mold and the bottom groove wall 14 of the base come into contact with each other, and at this point, the engaging elements are securely engaged with each other, and the punching blade die 4 is installed. Complete. Thereafter, the process proceeds to a punching process according to a predetermined procedure, and when the punching die 4 is removed, the punching die 4 can be removed simply by inserting a tool such as a screwdriver into the space 13 between adjacent punching dies and lightly swirling it. Therefore, it is easy to replace the extraction blade type.

  FIG. 10 shows a second embodiment of the present invention. The same members as those in the first embodiment described above are denoted by the same names and reference numerals, and only different portions will be described. In the bottom plate 9 below the punching blade mold 4, a distance piece 20 having a flat plate shape and a height similar to that of the corresponding contact plate is provided with respect to the bottom plate 9 instead of the frame-shaped contact plate 10 described in the first embodiment. The lower surface 21 is in contact with the bottom wall 14 (FIG. 2) of the recessed groove 3 when the punching blade mold is installed on the base 2 so that the surface fasteners are connected to each other. Engage suitably.

  Further, in the region surrounded by the distance piece of the bottom plate 9, the surface fasteners 15 and 16 are mounted in the same manner as in the first embodiment. Since the mounting manner of the surface fastener and the depth of the recess from the lower surface 21 of the distance piece 20 to the front end portion of the surface fastener are the same as those in the above-described embodiment, the description thereof will be omitted. Needless to say, the distance piece may be mounted on the bottom wall 14 of the recessed groove 3 of the base plate, which makes it easy to process the distance piece itself and facilitate bonding.

FIG. 11 shows a third embodiment of the present invention, which restricts the amount of lifting of the punched-blade mold caused by the vibration associated with the punching process of the resin molded sheet. The same members as those in the first embodiment are designated by the same names and reference numerals. Only different parts will be described. A punching blade mold 34 is installed in the recessed groove 33 of the base 32, and the base 38 and the bottom plate 39 of the punching blade mold are integrally fitted inside the punching blade 37. Further, a substantially circular stepped recess hole 40 is provided in the bottom wall 35 of the base 32, and a loosely fitting plate 41 is fitted therein, and penetrates the loosely fitting plate and the bottom blade type bottom plate 39 at a substantially central portion. The seat plate 44 is detachably attached to the lower surface of the bottom wall 35 of the base below it by a screw screw (not shown) or other fixing means. It is attached to.

  Further, a stepped protrusion 45 is provided on one side of the loose fitting plate 41, and the outer diameter of the large diameter portion and the small diameter portion is slightly smaller than the inner diameter of the large diameter hole and the small diameter hole of the stepped recess hole 40. In addition to being formed, the height of the stepped convex portion is set to be slightly higher than the height of the stepped portion 46 (small diameter portion) of the stepped recess hole, so that the vertical direction of the punching die 34 is set. The amount of movement with respect to the height of the stepped protrusion is limited to the difference between the height of the stepped recess 46 and the stepped recess 46, and also the horizontal fit between the loose fitting plate 41 and the stepped recess 40. It is limited to the movement amount of the diameter difference.

  Further, a loop type surface fastener 16 is mounted on the lower surface of the loose fitting plate 41, and a hook type surface fastener 15 is mounted on the seat plate 44 so as to face the surface fastener, and the surface fasteners are engaged with each other. The horizontal position of the punching blade die 34 is fixed. In this embodiment as well, this degree of engagement is determined by the height of the large-diameter portion of the loose-fitting plate 41 and the stepped recess hole 40, and the value is the same as in the first embodiment.

  In the third embodiment, the loose fitting plate 41 and the stepped recess hole 40 are provided as described above so as to limit the amount of movement in the vertical direction and the horizontal direction of the extraction blade die 34. Even if there is a rebound vibration associated with the punching operation of the molded sheet, the punching blade mold does not rise significantly from the base 32. Further, when the molded body 6 that has been punched out is taken out, it is normal that the molded body fits between the extraction blades 37 as the plate thickness of the molded body increases. Since it is tightened and held, the molded body 6 punched out in combination with the limitation of the amount of rebounding pops out, so that it can be taken out easily and its installation position is not greatly deviated.

  Furthermore, the mounting area of the hook-and-loop fastener 15.16 used in the present embodiment is economical because it may be a small area necessary for simply determining the installation position of the extraction blade type. Further, the surface fasteners 15 and 16 may be appropriately changed or deleted according to the material and thickness of the resin molded sheet to be punched, and either on the base 2 side or the punching die 4 side. A combination to be worn may be used, and the wearing mode is not particularly limited.

  As described above, according to the present invention, the work that has been determined after repeating the temporary fixing and trial hitting a plurality of times in order to determine the installation position of the conventional extraction blade type can be achieved in only one step and fixed. The loosening of the bolt can be eliminated, and a suitable engaged / fixed state can be maintained. Further, when removing the cutting blade mold 4 from the base 2, the operation and effect are great, such as being able to be easily detached without requiring a dedicated tool.

  The hook-and-loop fasteners 15 and the loop-type hook-and-loop fasteners 16 are mounted on the base plate 2 side and the cutting blade die 4 side. The hook-type surface fastener 15 may be attached to the side, and each of the attachment methods may be arranged such that the hook-type surface fastener 16 is disposed at the center of the bottom plate and the loop-type surface fastener is disposed at the periphery thereof. Needless to say, the hook-type surface fasteners or the loop-type surface fasteners have the same functions and effects, and various modifications are possible within the scope of the present invention.

It is a whole perspective view of the extraction blade type | mold apparatus for this invention resin sheet shaping | molding. It is explanatory drawing of a base | substrate. It is sectional drawing of an extraction blade type | mold. It is explanatory drawing of an extraction blade type | mold bottom face. It is explanatory drawing of a hook type surface fastener. It is explanatory drawing of a loop type surface fastener. It is explanatory drawing regarding the engagement of a hook_and_loop | surface fastener. It is explanatory drawing of the temporary engagement state of surface fasteners. It is explanatory drawing which shows the engagement state of surface fasteners. It is sectional drawing of 2nd Example of this invention. It is sectional drawing of 3rd Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Extraction blade type apparatus 2 Base 3 Recessed groove 4 Extraction blade type 5 Molded resin sheet 6 Molded body 7 Extraction blade 8 Base 9 Bottom plate 10 Contact plate 11 Lower surface 12 Opening 14 Bottom wall 15 Hook type surface fastener 16 Loop type surface fastener

Claims (5)

In a punching die device for punching a resin molded sheet comprising a punching die embedded with a punching blade and a base on which the punching die is installed, a hook-and-loop fastener is attached to the lower surface of the punching die and the base And a hook-and-loop fastener for engaging with the hook-and-loop fastener, facing the hook-and-loop fastener. Extraction blade type device for extraction. Either one of the extraction blade mold and the hook-and-loop fastener to be mounted on the base is mounted using both the hook-type hook fastener and the loop-type hook-and-loop fastener, and the hook-and-loop hook is a hook-type hook-and-loop fastener, 2. A punching blade type device for punching a resin molded sheet according to claim 1, wherein the engaging elements of the hook-and-loop fasteners are opposed to each other when they face each other and come into surface contact with each other. The tip of the engaging element of the hook-and-loop fastener mounted on the lower surface of the extraction blade mold is mounted to be recessed from the lower surface of the extraction blade mold, and the depth of the recess is set on the bottom plate below the extraction blade mold. 2. A punching blade type apparatus for punching a resin molded sheet according to claim 1, wherein the apparatus is adjustable by changing the height of the contact plate. The hook-and-loop surface fastener is mounted along the vicinity of the inner peripheral edge of the contact plate, and the loop-type surface fastener is mounted at a substantially central portion of the hook-and-loop surface fastener mounted on the bottom surface of the punching blade mold. 4. A punching blade type apparatus for punching a resin molded sheet according to claim 3, wherein a recessed groove is formed so as to be recessed from the upper surface of the sheet, and a hook type surface fastener is attached to the bottom wall thereof. In a punching die apparatus for punching a resin molded sheet comprising a punching die with a buried cutting blade and a base on which the punching die is installed, a stepped recess is provided in the bottom wall of the base. The hole is fitted with a loose-fitting plate that is fastened and fixed to the bottom plate of the extraction blade mold via a screw screw to limit the amount of movement of the extraction blade die in the horizontal and vertical directions, and the bottom surface of the extraction blade die. A hook-and-loop fastener is mounted on the loose-fitting plate, and a hook-and-loop fastener for engagement is mounted on the base side so as to oppose the hook-and-loop fastener. A punching blade type device for punching a resin molded sheet, characterized in that it can be freely attached and detached.

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