A die-cutting device for molded sheets and a method for cutting using the same.

Abstract

Depending on the usage conditions, the positioning of the cutting die relative to the molded sheet is made more efficient, thereby improving work efficiency. [Solution] The device comprises a plurality of dies 2 that are movable laterally on a substrate 1, a guide member 33 that is movable vertically by a screw rod 14 installed vertically on the dies 2, and a biasing means 41 that biases the guide member 33 away from the substrate 1. By pressing the pressing plate 61 toward the substrate 1, the resin molded body 52 is punched out by the dies 12 provided on the dies 2. Since the device is equipped with fixing means 71 for fixing the position of the plurality of dies 2 on the substrate 1, in a die-cutting device in which a plurality of dies 2 are movable laterally on a substrate 1, by fixing the position of some of the dies 2, the fixed dies 2 serve as a reference, and the amount of movement of the plurality of dies 2 as a whole is suppressed during alignment, thereby preventing the occurrence of defective products.

Description

Technical Field

[0001] The present invention relates to a mold extraction device for resin molded products formed by vacuum molding or pneumatic molding of food trays, product storage packages, etc. More specifically, it relates to a punching blade type device configured to be able to accurately punch a plurality of molded bodies formed on a resin molding sheet onto a substrate in one step by a punching blade type, and a punching method using the same.

Background Art

[0002] Conventionally, resin molded products such as food trays and product storage packages are used by punching a resin molded body formed by vacuum molding or pneumatic molding on a resin raw sheet into a desired dimensional shape by a punching device in a separate process.

[0003] When punching the package molded body into a desired size by a punching device, it is necessary to accurately match the arrangement position dimensions of each molded body formed on the raw sheet and the installation position relationship of the punching blade type before punching. The reason is that, for example, if there is a deviation or deformation in the punching position in the width dimension of the flange portion of the molded body, which is a food tray, when setting the molded body in a dedicated machine for packing food, it cannot be accurately set within its installation frame and the dedicated machine line may stop abnormally. Also, in the process of closing the lid of the molded body and adhering and sealing the peripheral edge of the flange portion, a uniform adhesive area cannot be ensured, which may cause many problems such as leakage of internal food or spoilage of internal food due to poor airtightness.

[0004] Therefore, conventionally, as a countermeasure, when installing a punching blade type block body with a punching blade embedded on a base, in order to accurately match the arrangement and positional relationship of each molded body formed on the resin molding sheet, the horizontal installation position of the punching blade type block body is repeatedly fine-tuned and then determined, and then the punching process is carried out.

[0005] To give an example of this type of prior art, in Japanese Patent Publication No. 10-113897 (Patent Document 1), a replacement block and a positioning block are provided on a base plate on which the blade-removing block body is mounted, and after repeatedly making temporary adjustments with fixing bolts to confirm the installation position, the bolts are tightened to fix them in place.

[0006] Furthermore, in Japanese Patent Publication No. 3613481 (Patent Document 2), the bolt mounting holes of the punching unit with embedded punching blades are made larger than the diameter of the bolts protruding from the mounting plate on the mounting side, allowing for fine adjustment of the mounting position of the punching unit. Also, in Japanese Patent Application Publication No. 2004-330388 (Patent Document 3), the bolt insertion holes of the block body with embedded punching blades are set to a diameter larger than the bolt shaft diameter, and the installation position is determined by repeatedly performing temporary tightening and position adjustment when mounting it to the support plate.

[0007] The aforementioned die-cutting devices all have a structure in which, in order to accurately match the arrangement dimensions of each molded body on the resin molded sheet with the installation position of the die-cutting block body, the fixing bolts are temporarily tightened in advance, and fine adjustments to the horizontal installation position are repeatedly made until the position is finalized and then tightened and fixed. Therefore, there is a problem that the work required to determine the positional relationship between the arrangement dimensions of each molded body on the molded sheet and the die-cutting block body is cumbersome.

[0008] Furthermore, because the insertion holes for the fixing bolts of the punching block body are made larger than the diameter of the bolts to allow for fine adjustment, the tightening gradually loosens during repeated punching operations, causing the installation position of the punching block to shift laterally and easily resulting in a large number of defective punched molded products. In addition, special tools are required for the installation and replacement of the punching block body, and the actual situation is that there are many problems with its structure and workability.

[0009] In contrast, a punching die device (for example, Patent Document 4) has been proposed in which a plurality of movable bases (corresponding to punching dies) that can move horizontally via guide rods (corresponding to pivots) are provided on a cutting blade base (corresponding to a substrate), and a receiving block (corresponding to a guide member) that can move vertically via plungers (corresponding to a biasing means) is provided on the movable base, and a cutting blade receiving seat (corresponding to a pressing plate) is placed on the cutting blade base, and the resin sheet (corresponding to a resin molded body) is punched out by pressing the movable base from above with this cutting blade receiving seat.

[0010] Furthermore, the die-cutting device described in Patent Document 4 comprises a sheet feeding unit having a sheet feeding device (not shown) for feeding resin sheets from a resin sheet roll, a heated molded body having a press molding device for press molding a molded body onto a resin sheet, and a cutting unit having a trimming press machine for separating the molded body from the resin sheet. The cutting blade support base is movably positioned between a cutting position and a molded product removal position in the cutting unit. After punching out the molded body from the resin sheet at the cutting position, the cutting blade support base is moved to the molded product removal position. At this molded product removal position, the molded body is held by a molded product transfer device and transported to a molded product transport conveyor. The scrap sheet after punching out the molded body is then wound onto a scrap sheet winding device.

[0011] In the cutting die device described in Patent Document 4, multiple (four in the figure) regulating shafts are erected and fixed to the cutting blade base via screw holes. These regulating shafts are loosely fitted into loose fitting holes formed in a movable base, and the play of the regulating shafts within the loose fitting holes allows the movable base to slide in the front-to-back and left-to-right directions when the molded body is fitted into the receiving block, thereby aligning the movable base with the molded body. Similarly, there is also a cutting die device (for example, Patent Document 5) that aligns the cutting die with the molded body by employing a configuration in which a cutting die that can move horizontally on a base plate and a guide member that can move vertically on a pivot located approximately in the center of the cutting die, with a biasing member provided on the cutting die. By covering the molded body of the resin molded sheet with the guide member, the installation position of the cutting die can be accurately positioned relative to the molded body.

[0012] However, in a cutting blade device like the one described in Patent Document 4, where the cutting blade base is movable between the cutting position and the molded product removal position, when the cutting blade base moves from the molded product removal position and stops at the cutting position, all the movable bases move so that they converge forward in the direction of movement. That is, in Figure 6 of Patent Document 4, the cutting blade unit at the cutting position becomes biased to the left, which negatively affects the subsequent alignment work by moving the movable bases and can lead to the production of defective products such as misaligned cutting positions.

[0013] Furthermore, even with devices where the operator places the molded sheet onto the cutting blade base before inserting it into the cutting position, if the depth of the molded body is shallow, or if the molded sheet is soft after pressing due to continuous molding, the molded body may not fit properly into the receiving block, making it difficult to align the molded body with the receiving block and increasing the likelihood of defective products. Alternatively, if the number of molded bodies punched out at one time increases, molded bodies with large misalignments may not fit properly into the receiving block, increasing the likelihood of defective products.

[0014] In particular, when forming molded bodies using this type of molded sheet with a heated press, the molded sheet hardens and shrinks from the center outwards after heating. Due to errors during this shrinkage, the outer molded bodies are more prone to misalignment compared to the central molded bodies, leading to the production of defective products. Furthermore, in systems where the molded bodies are automatically collected by suction or other means after punching, the failure to collect even one molded body causes the system to stop.

[0015] Furthermore, due to variations in the material and thickness of the molded sheet, shrinkage errors occurred, and the final product differed depending on temperature and humidity. As a result, it was sometimes impossible to align the molded body with the receiving block or guide member. [Prior art documents] [Patent Documents]

[0016] [Patent Document 1] Japanese Patent Publication No. 10-113897 (Figure 1) [Patent Document 2] Japanese Patent Publication No. 3613481 (Figure 2) [Patent Document 3] Japanese Patent Publication No. 2004-330388 (Figure 3) [Patent Document 4] Japanese Patent Publication No. 2004-17211 [Patent Document 5] Japanese Patent Publication No. 2010-137330 [Disclosure of the Invention] [Problems that the invention aims to solve]

[0017] Therefore, in view of the above-mentioned problems, the present invention aims to provide a die-cutting device for a molded sheet and a die-cutting method using the same, which can improve work efficiency by increasing the efficiency of the die-cutting operation on the molded sheet according to the usage conditions. [Means for solving the problem]

[0018] To achieve the above objective, the invention of claim 1 is a molded sheet die-cutting device comprising: a plurality of die-cutting dies provided on a substrate so as to be movable in the lateral direction; a guide member so as to be movable in the vertical direction by a pivot vertically provided on the die-cutting dies; and a biasing means provided on the die-cutting dies for biasing the guide member away from the substrate, wherein a pressing plate having an insertion hole for the guide member is placed on the substrate, and the resin molded body is punched out by a die-cutting dies provided on the die-cutting dies by pressing the pressing plate in a direction toward the substrate, the invention is characterized in that it comprises fixing means for fixing the plurality of die-cutting dies in position on the substrate.

[0019] Furthermore, the invention of claim 2 is characterized in that the pivot is vertically positioned in the center of the blade-removing mold, and the fixing means are provided on both sides of the pivot.

[0020] Further, in the invention of claim 3, the fixing means includes a fixing screw rod that is inserted through the punching blade type and the substrate, a female screw body that is screwed onto the tip of the fixing screw rod, and a tool engaging portion provided at the base end of the fixing screw rod. The guide member is fitted into the resin molded body, and recesses are provided on the opposing side surfaces of the guide member, and these recesses are provided corresponding to the tool engaging portion of the fixing screw rod.

[0021] Further, in the invention of claim 4, the female screw body is provided with a flange portion whose length direction is longer than the width direction. A stepped hole for inserting the fixing screw rod is formed in the substrate, and a through hole for inserting the fixing screw rod is provided in the punching blade type. The stepped hole has a female screw insertion portion for loosely inserting the female screw body and a flange insertion portion that is larger than the female screw insertion portion and for loosely inserting the flange portion. The flange portion has edge portions in the length direction on both sides in the width direction, and the flange insertion portion has inner peripheral portions in the length direction on both sides in the width direction. One end of the edge portion on one side in the width direction of the flange portion and the other end of the edge portion on the other side in the width direction are configured to be able to abut in a non-rotating state against the inner peripheral portion on one side in the width direction and the inner peripheral portion on the other side in the width direction.

[0022] Further, in the invention of claim 5, in the punching method of the molded sheet using the punching blade device of the molded sheet described in claim 1, three or more odd numbers of punching blade types are arranged in the front and back direction and the same number as in the front and back are arranged in the left and right direction. After fixing only the central punching blade type to the substrate by the fixing means, the resin molded body is punched.

Advantages of the Invention

[0023] According to the configuration of claim 1, in a punching blade type device in which a plurality of punching blade types are provided on a substrate so as to be movable in the lateral direction, by fixing some of the punching blade types in position, the fixed punching blade type serves as a reference, and the movement amount of the plurality of punching blade types as a whole can be suppressed during alignment, and the occurrence of defective products can be prevented.

[0024] According to the configuration of claim 2, by fixing the punching blade type to the substrate on both sides sandwiching the pivot, the punching blade type can be reliably fixed in position.

[0025] According to the configuration of claim 3, with the guide member attached, a tool can be inserted from the recess, the tool can be engaged with the tool engagement portion, the screw rod can be rotated, and the position can be fixed and released.

[0026] According to the configuration of claim 4, the stepped hole has a female screw insertion portion into which the female screw body is loosely inserted, and a flange insertion portion which is larger than the female screw insertion portion and into which the flange portion is loosely inserted. Therefore, in the unfixed state, the gap between the stepped hole and the female screw body and flange portion allows the blade removal die to move laterally. On the other hand, even if the fixing screw rod is turned in the tightening direction and the flange portion rotates together with the fixing screw rod, one end of the edge on one side in the width direction and the other end of the edge on the other side in the width direction come into contact with the inner circumference on one side in the width direction and the inner circumference on the other side in the width direction, preventing the female screw body with the flange portion from rotating. As a result, the fixing screw rod can be screwed into the female screw body and fixed.

[0027] According to the configuration of claim 5, the molded body on the central side of the molded sheet is less susceptible to the effects of shrinkage, and by fixing the position of the central die, compared to the case where all die-cutting molds are movable and their positions are uneven, the fixed central die-cutting mold serves as a reference, allowing for alignment with less movement of the other die-cutting molds, and effectively preventing the occurrence of defective products. [Brief explanation of the drawing]

[0028] [Figure 1] This is a perspective view showing an example of the present invention: a die-cutting mold, a molded sheet, and a pressing plate. [Figure 2] The same as above, this is an enlarged plan view of the main part of the blade-drawing type. [Figure 3] The same as above, this is an overall plan view of the blade-drawing type. [Figure 4] The same as above, this is a cross-sectional view of the main part of the blade-drawing type. [Figure 5] The same as above, this is an enlarged perspective view of the main part of the blade-drawing type. [Figure 6] The same as above, this is an exploded perspective view of the lower part of the blade-drawing type. [Figure 7] The above is an exploded perspective view of the upper part of the blade-drawing type. [Figure 8]The same as above, this is a perspective view of the lower surface of the loose fitting plate, stepped nut, and base plate. [Figure 9] The same as above, this is a perspective view showing a flanged nut installed in a stepped hole. [Figure 10] The same as above, this is a plan view showing a flanged nut installed in a stepped hole. [Figure 11] The same as above, this is a cross-sectional view of the biasing member. [Modes for carrying out the invention]

[0029] Preferred embodiments of the present invention will be described with reference to the accompanying drawings. Note that the embodiments described below do not limit the scope of the present invention as defined in the claims. Furthermore, not all of the configurations described below are essential requirements of the present invention. [Examples]

[0030] Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. Figures 1 to 11 show Embodiment 1 of the present invention. Figure 1 shows an overall view of the die-cutting device of the present invention. The substrate 1, which is roughly rectangular in plan view, consists of a substrate body 1A and a substrate base plate 5. The substrate body 1A has openings 3 for housing a plurality of die-cutting dies 2. In this example, die-cutting dies 2 arranged in three rows in the front-to-back direction and three rows in the left-to-right direction can be housed with spacing between them in the front-to-back and left-to-right directions, and the surrounding die-cutting dies 2 can be housed with spacing between them and the inner wall surface 4 of the opening 3.

[0031] Furthermore, a base plate 5, which constitutes part of the base plate 1, is detachably fixed to the lower surface of the base plate body 1A by screws 7 (Figure 4), which are means of attachment and detachment. The base plate 5 closes the lower surface of the opening 3, and multiple cutting dies 2 are mounted on the upper surface of the base plate 5 so as to be movable in the lateral direction. Gaps 6 are formed between adjacent cutting dies 2, 2 and between the surrounding cutting dies 2 and the inner wall surface 4 of the opening 3. Since multiple cutting dies 2, 2... are housed in one opening 3, the gaps 6 can be widened or narrowed by moving the cutting dies 2.

[0032] The blade removal type 2 comprises a wooden blade removal base 11 and a frame-shaped blade removal blade 12 on which the base 11 is mounted. A through hole 13 is drilled approximately in the center of the base 11, and a stepped hole 21 is drilled approximately in the center of the base plate 5. A pivot screw rod 14 is inserted through a loose fitting plate 16 made of synthetic resin or the like, and the screw rod 14 is inserted from below through the stepped hole 21 and the through hole 13. A through hole 17 for inserting the screw rod 14 is provided in the center of the loose fitting plate 16, corresponding to the through hole 13, and a tapered hole portion 17T (Figure 8) for housing the head 15 of the screw rod 14 is provided below the through hole 17. The head 15 is dish-shaped and has a tool engagement portion 15K into which a tool such as a Phillips head screw engages.

[0033] As shown in Figure 6 and other figures, the loose-fitting plate 16 integrally has a ring-shaped large diameter portion 18 and a small diameter portion 19. A stepped hole 21 for loosely fitting the large diameter portion 18 and the small diameter portion 19 is formed on the lower surface of the base plate 5. This stepped hole 21 has a large diameter hole portion 22 for housing the large diameter portion 18, a circular small diameter hole portion 23 for housing the small diameter portion 19, and a stepped surface 21D provided between the large diameter hole portion 22 and the small diameter hole portion 23. The small diameter portion 19 is smaller in diameter than the small diameter hole portion 23, and the maximum diameter of the large diameter portion 18 is smaller than the large diameter hole portion 22. The gap between the stepped hole 21 and the loose-fitting plate 16 allows the loose-fitting plate 16 to move horizontally within the stepped hole 21.

[0034] Furthermore, as shown in Figure 4, when the loose fitting plate 16 is housed in the stepped hole 21, the lower surface of the loose fitting plate 16 is positioned slightly above the lower surface of the base plate 5.

[0035] With the loosely fitted plate 16 housed in the stepped hole 21, the screw rod 14 is inserted from below through the through hole 17 and the through hole 13. A clawed nut 24, which acts as a locking nut, is screwed onto the upper part of the screw rod 14 that has passed through the through hole 13, and the screw rod 14 is positioned vertically in the cutting die 2. As shown in Figure 6, this clawed nut 24 has a flange-like portion 26 at one end of a cylindrical tubular nut 25, and multiple sharp claw portions 27 protruding downwards from this flange-like portion 26.

[0036] Then, when the screw rod 14 is screwed into the claw nut 24, the metal claw portion 27 is inserted into and locked onto the upper surface of the wooden base 11, fixing the claw nut 24 in an anti-rotation state. The lower surface of the flange portion 26 abuts against the upper surface of the base 11. Once the cutting die 2 is fixed to the screw rod 14 in this way, the cutting die 2 can move horizontally relative to the substrate 1 together with the screw rod 14.

[0037] As shown in Figure 4, the smaller diameter portion 19 is formed to be longer in the vertical direction (along the axis of the central part of the smaller diameter portion) than the smaller diameter hole portion 23. When the screw rod 14 is tightened and the tip of the smaller diameter portion 19 contacts the lower surface of the base 11, a gap is formed between the stepped surface 21D and the upper surface of the larger diameter portion 18. This gap prevents the upper surface of the larger diameter portion 18 of the loose fitting plate 16 from pressing against the stepped hole 21 on the lower surface of the substrate body 1A, allowing the cutting die 2 to move horizontally relative to the substrate 1. As mentioned above, the range of horizontal movement of the cutting die 2 is the range of the gap between the stepped hole 21 and the loose fitting plate 16.

[0038] Furthermore, the device includes a guide member 33 that guides the molded body 52 formed from the molded sheet 51. A recess 34 is formed in the center of the upper surface of the guide member 33, and a through hole 35 is drilled through the bottom surface of the recess 34 and the lower surface of the guide member 33. The upper part of the threaded rod 14 is inserted through this through hole 35, and a flanged nut 36 is screwed onto the tip of the inserted threaded rod 14. The flanged nut 36 has a cylindrical nut portion 37 with a substantially rectangular plate-shaped flange portion 38 integrally attached to one end, and is housed within the recess 34.

[0039] The guide member 33 is set to be constantly and evenly biased upward by a plurality of biasing means 41 embedded in the lower blade base 11. The structure of the biasing means 41 is such that a piston pin 43 inserted inside an outer cylinder 42 is configured to slide axially by the biasing force of a spring 44, as shown in Figure 11. A plurality of these (preferably four) are arranged near the periphery of the blade base 11, as shown in Figure 5, to bias the guide member 33 upward with an even force.

[0040] Furthermore, the biasing means 41 is not limited to the piston-shaped type described above, but may also be a coil spring or a bamboo spring (not shown), for example. In short, as long as it is a structure that maintains the horizontal position of the guide member 33 while biasing it evenly from below, its structure is not particularly limited.

[0041] Furthermore, a cylindrical member 45, which is an aluminum receiving member, is fixed to the recess 45A on the lower surface of the guide member 33, and the tip of the piston pin 43 of the biasing means 41 is always fitted into the engaging recess 46 on the lower surface of this cylindrical member 45, so that the blade-drawing die 2 and the guide member 33 move together horizontally, and the guide member 33 moves vertically relative to the base 11 between the position where the bottom surface of the recess 34 abuts against the flange portion 38 and the lower limit position of the piston pin 43.

[0042] The guide member 33 is movable along the screw rod 14 in the vertical direction (up and down direction) in the figure in response to the pressing and release of the pressing plate 61 from above during the punching process of the resin molded sheet 51. The upper limit of the guide member 33 is the position where it contacts the upper surface of the recess 34 with respect to the flange portion 38 of the flanged nut 36, and the lower limit of the guide member 33 is the position where the lower surface of the guide member 33 contacts the upper surface of the clawed nut 24 or the outer cylinder 42.

[0043] Furthermore, in this embodiment, the substrate base plate 5 provided at the bottom of the substrate body 1A is a separate component in order to facilitate the processing of the stepped hole 21 and the opening 3 of the substrate body 1A. It goes without saying that it may also be processed directly onto the substrate body 1A for processing convenience.

[0044] On the other hand, the pressing plate 61 (Figure 1) is attached to the pressing device of a punching machine (not shown) and is used to punch out the molded body 52 by pressing the resin molded sheet 51, which is placed on the punching die 2, in a direction that brings it closer to the substrate 1, that is, from above in this example. Multiple insertion holes 62 are provided on the substrate 1 corresponding to the number of punching die 2s, and are sized to surround and allow the guide member 33 on the punching die 2 and the molded body 52 that covers it to pass through. The contact plate 63 provided on the lower surface of the pressing plate 61 contacts the punching die 12 and presses, thereby punching out the molded body 52 on the resin molded sheet 51.

[0045] Furthermore, the guide member 33 has side guide surfaces 39 corresponding to the four sides of the molded body 52, and the spacing between adjacent side guide surfaces 39, 39 in the front-to-back direction decreases upward, and the spacing between adjacent side guide surfaces 39, 39 in the left-to-right direction decreases upward.

[0046] A contact plate 63 made of synthetic resin is detachably provided on the lower surface of the pressing plate 61, and the contact plate can be partially replaced when it wears out due to repeated pressing operations on the cutting die 2, thereby reducing mold costs. In terms of manufacturing, the pressing plate 61 and the contact plate 63 can be selectively molded as an integral part or as separate parts, depending on the size and number of molded bodies 52 to be manufactured.

[0047] In a cutting die device in which the cutting die 2 described above is provided to be movable in the horizontal direction, a fixing means 71 is provided for fixing the position of the cutting die 2 with respect to the substrate 1. This fixing means 71 comprises a flanged nut 36A having the same configuration as the flanged nut 36, and a fixing screw rod 72 that screws into the cylindrical nut portion 37 of the flanged nut 36A.

[0048] As shown in Figure 2, a semicircular recess 73 (Figure 4) is provided in the center of the opposing front and rear side guide surfaces 39, 39 of the guide member 33. A through hole 74 is drilled in the base 11 of the cutting die 2 below the recess 73, and a stepped hole 75 is drilled in the base plate 5 corresponding to this through hole 74. Above the through hole 74, a tapered hole portion 74T (Figure 6) is provided to house the head 72T of the fixing screw rod 72. The head 72T is countersunk and has a tool engagement portion 72K such as a Phillips groove.

[0049] As shown in Figure 8, the stepped hole 75 comprises a circular, large-diameter hole 76 into which the flange portion 38 of the flanged nut 36A is loosely inserted, a small-diameter hole 77 into which the cylindrical nut portion 37 is loosely inserted, and a downward-facing stepped surface 75D provided between the large-diameter hole 76 and the small-diameter hole 77. The large-diameter hole 76 has a substantially rectangular shape in plan, into which the flange portion 38 is loosely inserted.

[0050] Furthermore, since the gap between the stepped hole 75 and the flanged nut 36A is the same as or greater than the gap between the stepped hole 21 and the loose fitting plate 16, the cutting die 2 can move horizontally within the range of the gap between the stepped hole 21 and the loose fitting plate 16.

[0051] As shown in Figures 9 and 10, the flange portion 38 is longer in the length direction than in the width direction and has parallel longitudinal edges 81, 81 located on both sides in the width direction, and arc-shaped edges 83, 83A that connect one end 82, 82 of these longitudinal edges 81, 81 to each other, and the other ends 82A, 82A to each other. The large diameter hole portion 76, which is larger in length and width on a plane than the flange portion 38, is longer in the length direction than in the width direction and has parallel longitudinal inner circumferential portions 91, 91 located on both sides in the width direction, and arc-shaped inner circumferential portions 92, 92 that connect the ends of these longitudinal inner circumferential portions 91, 91.

[0052] The length L between one end 82 of the edge portion 81 on one side in the width direction and the other end 82A of the edge portion 81A on the other side in the width direction is longer than the length L1 between the inner circumference portions 91, 91. As shown in Figure 10, the one end 82 of the edge portion 81 on one side in the width direction (lower side in Figure 10) and the other end 82A of the edge portion 81 on the other side in the width direction (upper side in Figure 10) abut against the inner circumference portion 91 on one side in the width direction and the inner circumference portion 91 on the other side in the width direction in a rotation-preventing state.

[0053] Even if the flanged nut 36A rotates together with the threaded rod 72, as shown in Figure 10, one end 82 of the edge portion 81 on one side in the width direction and the other end 82A of the edge portion 81 on the other side in the width direction come into contact with the inner circumference portion 91 on one side in the width direction and the inner circumference portion 91 on the other side in the width direction, preventing the flanged nut 36A from rotating, thus allowing the fixing threaded rod 72 of the flanged nut 36A to be screwed in.

[0054] Furthermore, when the fixing screw rod 72 is turned in the loosening direction, and a force is applied to the flanged nut 36A in the opposite direction to the tightening direction, one end 82 of the flange portion 38 of one edge 81 (in this case, the upper side in Figure 10) and the other end 82A of the flange portion 38 of the other edge 81 (in this case, the lower side in Figure 10) come into contact with the inner circumference portions 91, 91, preventing rotation and allowing the fixing screw rod 72 to be loosened.

[0055] Thus, the cylindrical nut portion 37, which is the female screw body, is provided with a flange portion 38 that is longer in the length direction than in the width direction, a stepped hole 75 is drilled in the base plate 5 of the base plate 1 for inserting the fixing screw rod 72, and a through hole 74 is provided in the cutting die 2 for inserting the fixing screw rod 72, the stepped hole 75 has a small diameter hole portion 77 which is the female screw insertion portion for loosely inserting the cylindrical nut portion 37, and a larger diameter hole portion 76 which is larger than the small diameter hole portion 77 and is the flange insertion portion for loosely inserting the flange portion, the flange portion 38 has edges 81, 81A in the length direction on both sides in the width direction, and the larger diameter hole portion is the flange insertion portion The part 76 has longitudinal inner circumferential portions 91, 91 on both sides in the width direction, and one end 82 of the edge portion 81 on one side in the width direction and the other end 82A of the edge portion 81 on the other side in the width direction are configured to abut against the inner circumferential portion 91 on one side in the width direction and the inner circumferential portion 91 on the other side in the width direction in a rotation-preventing state. Therefore, the stepped hole 75 has a small diameter hole portion 77 into which the fixing screw rod 72 is loosely inserted, and a larger diameter hole portion 76 which is larger than the small diameter hole portion 77 and into which the flange portion 38 is loosely inserted. In the unfixed state, the gap between the stepped hole 75 and the cylindrical nut portion 37 and the flange portion 38 allows the cutting die 2 to move laterally. On the other hand, even if the fixing screw rod 72 is turned in the tightening direction and the flange portion 38 rotates together with the fixing screw rod 72, one end 82 of the edge portion 81 on one side in the width direction and the other end 82A of the edge portion 81 on the other side in the width direction come into contact with the inner circumference portion 91 on one side in the width direction and the inner circumference portion 91 on the other side in the width direction, preventing the cylindrical nut portion 37 with the flange portion 38 from rotating. Therefore, when the fixing screw rod 72 is screwed into the cylindrical nut portion 37, the upper surface of the flange portion 38 of the flanged nut 36A presses against the stepped surface 75D of the stepped hole 75, and the cutting die 2 can be fixed to the base plate 1.

[0056] Then, a flanged nut 36A is placed in the stepped hole 75, a fixing screw rod 72 is inserted through the through hole 74 from the top of the base 11, and this fixing screw rod 72 is screwed into the flanged nut 36A. When the front and rear fixing screw rods 72, 72 are tightened, the base 11 is fixed to the base plate 5, and the cutting die 2 is fixed in position relative to the base plate 1.

[0057] In this case, a semicircular recess 73 is provided in the center of the opposing front and rear side guide surfaces 39, 39 of the guide member 33. By inserting a tool through this recess 73 and engaging the tool with the tool engagement portion 72K of the fixing screw rod 72, the fixing screw rod 72 can be operated. Therefore, the position fixing and release operations of the blade removal type 2 can be easily performed without removing the guide member 33.

[0058] Next, a method for punching out a molded body 52 using the punching die device of the present invention will be described. In this embodiment, when the punching dies 2 are arranged in three rows in the front-to-back direction and three rows in the left-to-right direction, first, the central punching die 2 is fixed in place.

[0059] Furthermore, the blade-drawing molds 2 may be arranged in odd numbers, such as 5 vertically and 7 horizontally. However, if 9 are arranged vertically and 9 horizontally, since the number is large, it will be necessary to fix not only the central one, but also several other blade-drawing molds 2, though not all of them. Moreover, in the case of 3 vertically, 7 horizontally, and 9 horizontally, only the 3, 7, or 9 arranged vertically or horizontally, including the central one, may be fixed.

[0060] Then, the substrate 1 is transferred or placed on the table of a die-cutting machine (not shown), and a resin molded sheet 51, which has been separately formed by vacuum forming or pneumatic forming, is placed over the guide member 33 on the die-cutting die 2 that is set on the substrate 1.

[0061] At this time, the molded bodies 52 formed on the molded sheet 51 are fitted onto each of the guide members 33, guided by the guide members 33. The cutting die 2, which is integrally pivotally supported by the screw rod 14 on the guide members 33, also moves horizontally in accordance with the arrangement dimensions of each molded body 52, and its installation position is precisely determined.

[0062] In this case, the molded body 52 on the central side of the molded sheet 51 is less susceptible to shrinkage and other effects. By fixing the position of the central die 2, all other die 2s become movable. Compared to the case where all die 2s are positioned unevenly, the fixed central die 2 serves as a reference, allowing for alignment with less movement of the other die 2s, thus effectively preventing the occurrence of defective products.

[0063] Next, when the pressing plate 61 attached to the pressing device descends and presses against the blade 12, the guide member 33 also moves along the screw rod 14 and descends. At the same time, the piston pin 43 of the biasing means 41 that biases the guide member 33 from below is also pressed downward, and the piston pin 43 hangs down against the tension of the built-in spring 44.

[0064] Then, when the pressing plate 61 and the punching blade 12 press together sufficiently to punch out the molded body 52 from the resin molded sheet 51, the pressing plate 61 rises, releasing the pressure on the punching blade 12. At the same time, the biasing force of the biasing means 41 causes the guide member 33 to spring up forcefully. Simultaneously, the punched-out molded body 52 also springs up due to this recoil and detaches from the guide member 33.

[0065] Furthermore, since the range of movement of the guide member 33 is restricted by the claw nut 24 that is screwed onto the screw rod 14, it does not detach from the screw rod 14, and by repeating this operation, a suitable punching operation can be performed.

[0066] As described above, if defective products still occur even when the central die-cutting die 2 is fixed in place, then the central die-cutting die 2 and any one adjacent die-cutting die 2 are fixed together and tested. Furthermore, if necessary, the central die and the two adjacent die-cutting dies 2, 2, 2 are fixed together in a row of three, either front to back or left to right, and then the number of fixed die-cutting dies 2 is increased and tested to prevent the occurrence of defective products. The conditions are derived. Note that all die-cutting dies 2 may also be fixed.

[0067] As described above, according to the present invention, the guide member 33 determines the placement position of the molded body 52 of the resin molded sheet 51 and the installation position of the punching die 2 accurately and immediately, and the punched molded body 52 can be easily removed, thus improving work efficiency more than ever before.

[0068] Furthermore, the preparatory work such as temporary fixing and test firing to determine the installation position of the blade-removing type 2, which was previously performed, is no longer necessary, resulting in significant advantages and benefits.

[0069] Thus, in this embodiment, corresponding to claim 1, a plurality of laterally movable cutting blades 2, 2... are provided on a substrate 1, a guide member 33 is movable vertically by a pivot screw rod 14 vertically installed on a cutting blade 2, and a biasing means 41 is provided on a cutting blade 2 that biases the guide member 33 away from the substrate 1. A pressing plate 61 having an insertion hole 62 for the guide member 33 is placed on the substrate 1, and by pressing the pressing plate 61 in a direction toward the substrate 1, the cutting blades provided on the cutting blade 2 are removed. In a die-cutting device for a molded sheet 51 configured to punch out a resin molded body 52 using 12, the device is equipped with fixing means 71 for fixing the position of multiple die-cutting dies 2, 2... on a substrate 1. Therefore, in a die-cutting device in which multiple die-cutting dies 2, 2... are provided on a substrate 1 so as to be movable laterally, by fixing the position of some of the die-cutting dies 2, the fixed die-cutting dies 2 serve as a reference, and the amount of movement of the multiple die-cutting dies 2, 2... as a whole is suppressed during alignment, thereby preventing the occurrence of defective products.

[0070] Thus, in this embodiment, in accordance with claim 2, a pivot screw rod 14 is vertically installed in the center of the blade-removing mold 2, and fixing means 71, 71 are provided on both sides of this screw rod 14, so that the blade-removing mold 2 can be reliably fixed in position.

[0071] Thus, in this embodiment, corresponding to claim 3, the fixing means 71 includes a fixing screw rod 72 that is inserted through the cutting die 2 and the base plate 5 which constitutes a part of the base plate, a cylindrical nut portion 37 which is a female screw body that is screwed onto the tip of the fixing screw rod 72, and a tool engagement portion 72K provided at the base end of the fixing screw rod 72. The guide member 33 is fitted into the molded body 52, and recesses 73 are provided on the side guide surfaces 39, 39 which are opposing sides of the guide member 33. Since these recesses 73, 73 are provided corresponding to the tool engagement portion 72K of the fixing screw rod 72, with the guide member 33 attached, a tool can be inserted through the recess 73, the tool can be engaged with the tool engagement portion 72K, and the fixing screw rod 72 can be rotated to fix and release the position.

[0072] Thus, in this embodiment, corresponding to claim 4, a flange portion 38 is provided on the cylindrical nut portion 37 which is the female screw body, and the flange portion 38 is longer in the length direction than in the width direction. A stepped hole 75 is drilled in the base plate 1 for inserting the fixing screw rod 72, and a through hole 74 is provided in the cutting die 2 for inserting the fixing screw rod 72. The stepped hole 75 has a small diameter hole portion 77 which is the female screw insertion portion for loosely inserting the cylindrical nut portion 37, and a larger diameter hole portion 76 which is larger than the small diameter hole portion 77 and is the flange insertion portion for loosely inserting the flange portion 38. The flange portion 38 has edges 81, 81 in the length direction on both sides in the width direction, and the large diameter hole portion 76 is width The stepped hole 75 has longitudinal inner circumferential portions 91, 91 on both sides, and one end 82 of one edge portion 81 in the width direction and the other end 82A of the other edge portion 81 in the width direction are configured to abut against the inner circumferential portion 91 on one side in the width direction and the inner circumferential portion 91 on the other side in the width direction in a rotation-preventing state. Therefore, the stepped hole 75 has a small diameter hole portion 77 into which the cylindrical nut portion 37 is loosely inserted, and a larger diameter hole portion 76 which is larger than the small diameter hole portion 77 and into which the flange portion 38 is loosely inserted. In the unfixed state, the gap between the stepped hole 75 and the cylindrical nut portion 37 and the flange portion 38 allows the cutting die 2 to move laterally. On the other hand, even if the fixing screw rod 72 is turned in the tightening direction and the flange portion 38 rotates together with the fixing screw rod 72, one end 82 of the edge portion 81 on one side in the width direction and the other end 82A of the edge portion 81 on the other side in the width direction come into contact with the inner circumference portion 91 on one side in the width direction and the inner circumference portion 91 on the other side in the width direction, preventing the cylindrical nut portion 37 with the flange portion 38 from rotating. As a result, the fixing screw rod 72 can be screwed into the cylindrical nut portion 37 and fixed in place.

[0073] Thus, in this embodiment, corresponding to claim 5, in the method for punching out a molded sheet 51 using the molded sheet punching device described in claim 1, the punching dies 2 are arranged in an odd number of three or more in the front-to-back direction, and the same number of three in the left-to-right direction. Only the central punching die 2 is fixed in position on the substrate 1 by the fixing means 71, and then the resin molded body 52 is punched out. As a result, the molded body 52 on the central side of the molded sheet 51 is less affected by shrinkage, etc. By fixing the position of the central punching die 2, compared to the case where all the punching dies 2 are movable and their positions are uneven, the fixed central punching die 2 becomes a reference, and the amount of movement of the other punching dies 2 is reduced to align them, thereby effectively preventing the occurrence of defective products.

[0074] As an effect of the embodiment described below, the small-diameter portion 19 is formed to be longer than the small-diameter hole portion 23, and when the screw rod 14 is tightened and the tip of the small-diameter portion 19 comes into contact with the lower surface of the base 11, a gap is formed between the stepped surface 21D and the upper surface of the large-diameter portion 18, and this gap allows the cutting die 2 to move horizontally with the substrate 1 together with the screw rod 14.

[0075] Furthermore, since the gap between the stepped hole 75 and the flanged nut 36A is the same as or greater than the gap between the stepped hole 21 and the loose fitting plate 16, the cutting die 2 can move horizontally within the range of the gap between the stepped hole 21 and the loose fitting plate 16.

[0076] Furthermore, the length L between one end 82 of the edge portion 81 on one side in the width direction and the other end 82A of the edge portion 81A on the other side in the width direction is longer than the length L1 between the inner circumference portions 91, 91, and as shown in Figure 10, the one end 82 of the edge portion 81 on one side in the width direction and the other end 82A of the edge portion 81A on the other side in the width direction abut against the inner circumference portion 91 on one side in the width direction and the inner circumference portion 91 on the other side in the width direction in a rotation-preventing state.

[0077] Furthermore, in this punching method using a die-cutting device, one central die-cutting die 2 is fixed among multiple die-cutting dies 2, 2..., while the other die-cutting dies 2 are movable. After performing a punching test on the molded body 52, the die-cutting dies 2 adjacent to the fixed die-cutting die 2 are fixed and a punching test is performed. In the same manner, the number of die-cutting dies 2 fixed is sequentially increased for testing. Therefore, compared to a case where all die-cutting dies 2 are movable, the amount of movement of the die-cutting dies 2 during alignment is reduced, and the occurrence of defective products can be prevented.

[0078] In this embodiment, the substrate 1 and pressing plate 61 are preferably made of wooden plywood, taking into consideration processability and cost, but they may also be made of molding resin, and it goes without saying that various modifications are possible within the scope of the gist of the present invention.

[0079] Furthermore, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the gist of the invention. For example, in the embodiments, a die-cutting mold is provided on the substrate and a pressing plate is placed on the substrate, but the die-cutting mold may be provided below the substrate and the pressing plate may be placed below the substrate. Also, in claims 1 and 2, the molded body may be fitted inside the guide member. Furthermore, in claim 1, there may be one fixing means, or three or more fixing means may be provided. Also, in the embodiments, an example is shown in which three die-cutting molds are arranged vertically and horizontally, but they may be arranged in five vertically and horizontally, or seven vertically and horizontally. [Explanation of symbols]

[0080] 1 circuit board 2 Cutting die 5. Circuit board base plate (circuit board) 12. Removing the blade 14. Screw rod (pivot) 21 stepped holes 33 Guide member 36A Flanged Nut 37. Cylindrical nut section (female screw body) 38 Guard section 39 Side guide surface (side) 41. Biasing means 51 Molded Sheet 52 Molded body 61 Pressing plate 62 Through hole 71 Fixing means 72 Fixing screw rod 72K Tool engagement part 74 Through holes 75 stepped holes 76 Large diameter hole (flange insertion part) 77 Small diameter hole (female screw insertion area) 81. Edge on one side in the longitudinal direction 81 The other side of the longitudinal edge 82 One end (one edge) 82A Other end (the other edge) 91 Inner circumference in the longitudinal direction

Claims

1. Multiple cutting blades are provided on the substrate so as to be movable laterally, A guide member that can move vertically on the aforementioned blade-removing mold by a pivot, The cutting die is provided with a biasing means that biases the guide member in a direction away from the substrate, In a die-cutting device for a molded sheet, a pressing plate having an insertion hole for the guide member is placed on the substrate, and the resin molded body is punched out by a punching blade provided in the die-cutting device by pressing the pressing plate in a direction toward the substrate, A molded sheet cutting die apparatus characterized by comprising fixing means for positioning and fixing the plurality of cutting dies on the substrate.

2. The molded sheet die-cutting device according to claim 1, characterized in that the pivot is vertically positioned in the center of the die-cutting die, and the fixing means are provided on both sides of the pivot.

3. The fixing means comprises a fixing screw rod inserted through the cutting die and the substrate, a female screw body that screws onto the tip of the fixing screw rod, and a tool engagement portion provided at the base end of the fixing screw rod. The molded sheet cutting die device according to claim 1 or 2, characterized in that the guide member is fitted into the resin molded body, recesses are provided on opposing sides of the guide member, and these recesses are provided corresponding to the tool engagement portion of the fixing screw rod.

4. The female screw body is provided with a flange portion that is longer in the length direction than in the width direction, a stepped hole is drilled in the substrate for inserting the fixing screw rod, and a through hole is provided in the cutting die for inserting the fixing screw rod. The stepped hole has a female screw insertion portion into which the female screw body is loosely inserted, and a flange insertion portion which is larger than the female screw insertion portion and into which the flange portion is loosely inserted. The flange portion has longitudinal edges on both sides in the width direction, and the flange insertion portion has longitudinal inner circumferences on both sides in the width direction. The die-cutting device for a molded sheet according to claim 3, characterized in that one end of the edge on one side in the width direction and the other end of the edge on the other side in the width direction are configured to be able to contact the inner circumference on one side in the width direction and the inner circumference on the other side in the width direction in a rotation-preventing state.

5. A method for punching out a molded sheet using the molded sheet punching device described in claim 1, wherein the punching dies are arranged in an odd number of three or more in the front-to-back direction, and the same number are arranged in the left-to-right direction, and only the central punching die is fixed in position on the substrate by the fixing means, and then the resin molded body is punched out.

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