JP2012071373A - Blanking die for molded sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blanking die for a molded sheet in which the position of a blanking blade is easily adjusted with respect to the dimensional error of the molded sheet.SOLUTION: A plurality of concave grooves (13) are formed longitudinally or laterally on the front surface side of a mounting plate (11), a plurality of concave grooves are formed on the rear surface side in a direction orthogonal to the concave grooves (13), and enlarged concave parts (16) are formed at both ends of the concave groove. Screw rods (15) or bolts are inserted into the plurality of concave grooves, and the nuts (18) and the screw rods (15) are screwed together in the enlarged concave parts via washers (17). By moving the nuts of both ends back and forth relatively to each other helically or moving the nuts back and forth helically with respect to bolt heads, the mounting plate is fastened or loosened longitudinally and/or laterally, and the entire mounting plate is elongated or contracted.

Description

  The present invention relates to a punching die for a molded sheet, and more particularly to a punching die in which the position of a punching blade can be easily adjusted with respect to a dimensional error of the molded sheet.

  Fresh foods such as fish, meat, and fruits are often divided into food trays, wrapped and displayed on shelves. Normally, this type of food tray is formed as a single large sheet 100 as shown in FIG. 5, for example, by vacuum forming or pressure forming, and after forming, individual trays 110 are punched from the forming sheet 100 using a punching die. Manufactured by unplugging.

  The molded sheet punching die described above employs a structure in which a plurality of punching blades are arranged side by side and fixed on the mounting plate in accordance with the shape of the tray. However, a dimensional error may occur in the molded sheet for each production lot due to variations in the heat shrinkage rate of the raw material resin and variations in manufacturing conditions. If there is a dimensional error, punching of the tray is not performed at a predetermined position, resulting in a product defect.

  On the other hand, a punching die has been proposed in which a punching blade is fixed to a punching unit, a plurality of punching units are mounted on a mounting plate so that the mounting position can be adjusted by bolts and nuts, and the position of the punching blade can be adjusted. (Patent Document 1, Patent Document 2, and Patent Document 3), however, it is necessary to individually adjust the positions of the plurality of punching units, and the work is complicated.

  On the other hand, the mounting plate is divided into a plurality of support plates, and adjacent support plates are fixed with a thrust rod with a gap member interposed therebetween, while a plurality of punching blades are fixed to the mounting plate side by side so as to straddle the support plate. A punching die is proposed (Patent Document 4).

  In this punching die, by rotating or reversing the thrust rod, the thrust plates at both ends of the thrust rod can be approached or separated, and the positions of a plurality of punching blades can be adjusted by reducing or increasing the interval between adjacent support plates. The complexity of adjustment is relatively small.

Japanese Patent No. 3613481 JP 2009-18378 A JP 2004-330388 A Japanese Utility Model Publication No. 06-27100

  By the way, when the present inventors variously examined the dimensional error of the molded sheet, the dimensional error of the molded sheet is unlikely to shift the position of the specific tray of the plurality, and the entire molded sheet is in the vertical direction or the horizontal direction. It came to know that it is often stretched.

  From the above knowledge, the punching die described in Patent Document 4 adjusts the position for each adjacent support plate, so there is room for improvement in this respect.

  This invention pays attention to this point, and makes it a subject to provide the punching die of the shaping | molding sheet which enabled it to adjust the position of a punching blade easily with respect to the dimension error of a shaping | molding sheet.

  Therefore, the molded sheet punching die according to the present invention is a molded sheet punching die for punching individual trays from a molded sheet formed by arranging a plurality of trays vertically and horizontally, and the mounting plate is punched from the molded sheet. A plurality of punching blades are fixed side by side in the vertical and horizontal directions, and a plurality of concave grooves extending across the entire length in the vertical or horizontal direction are formed at intervals on the surface side of the mounting plate. A plurality of concave grooves extending over the entire length in a direction orthogonal to the concave grooves on the front surface side are formed on the back surface side at intervals, and the plurality of concave grooves are screw rods formed with screws at both ends. Alternatively, a bolt having a head formed at one end and a screw formed at the other end is inserted, enlarged recesses are formed at both ends of the plurality of recessed grooves, and both ends of the screw rod are threaded into the enlarged recess. Na screwed into Or the bolt head and the nut are fitted via a washer, and the mounting plate is moved in the vertical direction and / or by screwing the nuts at both ends or screwing the nut against the bolt head. It is characterized by being tightened in the lateral direction so that the tightening can be loosened.

  One of the features of the present invention is that a plurality of grooves extending in the vertical and horizontal directions are formed on the front and back surfaces of the mounting plate, the screw rod or the bolt is inserted, and the nut is screwed back and forth with respect to the screw rod or the bolt head. Thus, the nut is screwed back and forth to tighten the mounting plate in the vertical direction and / or the horizontal direction, and the tightening is loosened.

  As a result, the concave groove is bent by the vertical and horizontal tightening, the bending is restored by releasing the tightening, and the entire mounting plate is expanded and contracted in the vertical direction and / or the horizontal direction, thereby adjusting the position of the punching blade. The position of the blade can be easily adjusted.

  The mounting plate may be integrally formed, but there is a concern that the size of the punching blade that can be adjusted is short. Therefore, if the mounting plate is divided into a plurality of support plates and the spacers between the adjacent support plates are inserted in a replaceable manner, it is possible to ensure an arbitrary dimension that allows adjustment of the punching blade.

It is a schematic perspective view which shows preferable embodiment of the punching die of the shaping | molding sheet which concerns on this invention. It is a top view which shows the said embodiment. It is a principal part perspective view of FIG. It is a schematic perspective view which shows 2nd Embodiment. It is a figure which shows an example of a shaping | molding sheet.

  Hereinafter, the present invention will be described in detail based on specific examples. 1 to 3 show a preferred embodiment of a punching die for a molded sheet according to the present invention. In the drawing, a punching die 10 is formed by penetrating grooves embedded in a mounting plate 11 such as a plywood into a shape corresponding to the arrangement of the trays 110 of the molded sheet 100 by laser beam processing or the like. The punching blade 12 is embedded.

  The punching blade 12 is rubbed with the adjacent punching blade 12 at the corner portion, and the punching blade 12 changes its position in the vertical direction and / or the horizontal direction with respect to the lateral load applied to the punching blade 12. It is designed to absorb the load.

  A plurality of concave grooves 13 extending over the entire length in the longitudinal direction are formed on the front surface side of the mounting plate 11 at equal intervals, and a direction orthogonal to the concave grooves 13 on the front surface side is formed on the back surface side of the mounting plate 11, that is, A plurality of concave grooves (not shown) extending over the entire length in the lateral direction are formed at equal intervals.

  Screw rods 15 are inserted into the plurality of concave grooves 13, male screws are formed at both ends of the screw rods 15, and enlarged concave portions 16 are formed at both ends of the plural concave grooves 13. 17 and the nut 18 are inserted, and the nut 18 is screwed into the male thread of the threaded rod 15.

  For example, when adjusting the vertical position of the punching blade 12, the nuts 18 at both ends of the screw rod 15 extending in the vertical direction are rotated in the screwing direction. Then, a plurality of concave grooves extending in the lateral direction on the back surface of the mounting plate 11 are bent and the entire mounting plate 11 is contracted in the vertical direction, so that the position of the punching blade 12 can be adjusted so that the vertical interval is narrowed. .

  On the other hand, when the nuts 18 at both ends of the screw rod 15 extending in the vertical direction are rotated (reversely rotated) in the screwing direction, the bending of the plurality of concave grooves extending in the horizontal direction is released, and the vertical contraction of the mounting plate 11 is released. Since it is released, the position of the punching blade 12 can be adjusted so that the vertical interval is wide.

  When the lateral position of the punching blade 12 is adjusted, the nuts 18 at both ends of the threaded rod extending in the lateral direction may be rotated in the screwing direction and rotated (reversely rotated) in the screwing direction.

  As described above, the position of the punching blade 12 can be adjusted by a simple operation of moving the nut 18 back and forth.

  FIG. 4 shows a second embodiment, in which the same reference numerals as those in FIGS. 1 to 3 denote the same or corresponding parts. In this example, the mounting plate 11 is divided into a plurality of support plates 11A, a spacer 20 is inserted between adjacent support plates 11A, a screw rod 15 is inserted into the spacer 20, and punching is performed by exchanging the spacer 20. A dimension capable of adjusting the position of the blade 12 can be arbitrarily set.

DESCRIPTION OF SYMBOLS 10 Punching die 11 Mounting plate 11A Support plate 12 Punching blade 13 Concave groove 15 Screw rod 16 Enlarged recessed part 17 Washer 18 Nut 20 Spacer

Claims (2)

In a punching die for a molded sheet for punching individual trays from a molded sheet formed by arranging a plurality of trays vertically and horizontally,
A plurality of punching blades (12) for punching the tray (110) from the molded sheet (100) are fixed to the mounting plate (11) side by side,
On the surface side of the mounting plate (11), a plurality of concave grooves (13) extending over the entire length in the vertical direction or the horizontal direction are formed at intervals, while on the back side of the mounting plate (11) A plurality of grooves extending over the entire length in the direction orthogonal to the groove (13) on the surface side are formed at intervals,
A screw rod (15) having a screw formed at both ends or a bolt having a head formed at one end and a screw formed at the other end are inserted into the plurality of concave grooves (13),
Enlarged recesses (16) are formed at both ends of the plurality of concave grooves (13), and nuts (18) or bolt heads screwed into both ends of the threaded rod (15) are inserted into the expanded recesses (16). Part and nut are fitted through a washer,
The mounting plates (11) are tightened in the longitudinal direction and / or the lateral direction by loosening the tightening by reciprocating the nuts (18) with each other or by reciprocating the nuts with respect to the bolt heads. A die for punching a molded sheet characterized by the above. The punching die for a molded sheet according to claim 1, wherein the mounting plate (11) is divided into a plurality of support plates (11A), and a spacer (20) between adjacent support plates (11A) is inserted in a replaceable manner. .

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