JP3718003B2 - Blank sheet manufacturing method and apparatus for plastic sheet - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a punching and ruled line processing method and apparatus used for manufacturing a box blank plate from a plastic sheet, and more particularly to a processing method capable of preventing the deflection and distortion of the manufactured box blank plate. Is.
[0002]
[Prior art]
As part of the process of manufacturing a folding box using paper or plastic sheet, the sheet or plastic sheet is punched out and creased to create a blank plate (developing flat plate with creased lines inside) There are processing steps to manufacture. For this processing, a punching die in which a punching blade and a ruled blade are implanted in a base material is usually used by being attached to a press-type automatic flat plate punching machine (Auton die cutting machine). In the conventional die used by attaching to this automatic flat plate punching machine, a piece of sheet paper or plastic sheet punched by the punching blade at the time of punching does not adhere around the cutting blade. In addition, sticking rubber with a small width was attached to both sides of the cutting blade.
[0003]
[Problems to be solved by the invention]
In the above-described conventional punching method using a punching die, a small-width protruding elastic body is affixed on both sides of the punching blade of the cutting die, and the box blank plate is punched by the action of the protruding elastic body. Although there was an effect that the sheet or plastic sheet did not adhere to the cutting blade immediately after being pulled out, but at the same time as punching with the cutting blade, a ruled line for folding was provided on the blank board for the box with the stamping blade In particular, when a box blank plate is manufactured using a plastic sheet, there is a big problem as described in detail below.
[0004]
That is, when a plastic sheet is punched with a die and a ruled line is provided at the same time, the inner side of the blank sheet for a plastic sheet box whose periphery is regulated by a cutting blade is expanded while being pressed by the ruled blade. Therefore, there is a problem that the box blank plate is bent or distorted, and the entire flatness is impaired.
[0005]
Therefore, when a box is made using the box blank plate with such deflection and distortion and a plastic folding box is assembled, a product with poor appearance due to unevenness on each side of the box is produced. There was a problem. Furthermore, when making a box with a cartoning machine (automatic box making machine), the process of inserting and closing the flap of the box is unstable due to deflection and distortion of the box blank plate, and many defective products occur. There was a problem that due to troubles, continuous box making was not possible and operation was stopped.
[0006]
Conventionally, as a method of manufacturing and processing a box blank board from a sheet or a plastic sheet, for example, Japanese Patent Publication No. Sho 62-47680 (first known technique), Japanese Patent Publication No. Sho 61-50772 (second known technique), Techniques such as JP-A-5-212783 (third known technique) and JP-A-5-154901 (fourth known technique) have been invented.
[0007]
That is, in the first known technique, when manufacturing a blank box for a paper box using a punching die in which a punching blade and a ruled blade are implanted, the face plate corresponding to the punching is placed at a predetermined position. A technique for attaching and processing a surface paper having a shape corresponding to the cutting blade and the ruled blade is described in detail. In addition, the second known technique describes a punching method in which a punching die having a plurality of punching blades is divided into blocks, and processing is performed by shifting the cutting processing timing of the punching die for each block. .
[0008]
Furthermore, the third known technique and the fourth known technique each describe a method of processing a plastic sheet. In particular, in the third known technique, a thermoplastic sheet is placed on a molding table heated to near its softening temperature and pressed with a similarly heated ruler blade to fold the plastic sheet. A technique for forming ruled lines for music is described. Further, in the fourth known technique, a box blank plate is processed by disposing a crease line heat processing part and a punching part for providing a crease on the intermittent conveyance line, respectively. The technology is described.
[0009]
However, any of the first to fourth known techniques described above can easily punch a box blank plate or provide a folding line, but these techniques can be used. In particular, it has been difficult to prevent bending and distortion from occurring in a box blank plate produced by punching out a thin plastic sheet having a thickness of 0.1 to 0.8 mm.
[0010]
The plastic sheet blank plate manufacturing method and apparatus according to the present invention is a completely new invention developed in view of the above-mentioned conventional problems, and particularly when a blank sheet for a box is manufactured by punching a plastic sheet. Projecting almost the entire surface of the blank plate, sticking an elastic body, and punching out the plastic sheet with a cutting blade, the plastic sheet of the portion that becomes the blank plate for the box protrudes and is supported by the elastic body in its entirety, This is a completely new technology that can prevent the box blank plate from being bent or distorted.
[0011]
[Means for Solving the Problems]
The plastic sheet blank manufacturing method according to the present invention is a method for producing a plastic sheet that is subjected to ruled line processing on a plastic sheet or a developed plastic sheet of a box using a mold in which a cutting blade and a ruled blade are implanted in a base material. In the blank plate manufacturing method, a protruding elastic body that is higher than the cutting edge implanted in the die is pasted on almost the entire surface of the portion corresponding to the blank plate portion of the mold, and the entire surface of the plastic sheet is elastically protruding. It is characterized in that the processing is performed while being supported by the body.
[0012]
Also, in the blank sheet manufacturing method of the plastic sheet described above, when punching out the plastic sheet with a punching blade, the blanking plate and the ruled line are simultaneously processed while supporting substantially the entire surface of the blank sheet with a protruding elastic body. You can also.
[0013]
The plastic sheet blank plate manufacturing apparatus according to the present invention is an apparatus for performing ruled line processing on a plastic sheet or a developed plastic sheet of a box using a mold in which a cutting blade and a ruled blade are implanted in a base material. In this case, a protruding elastic body higher than the cutting edge implanted in the punching die is attached to substantially the entire surface of the portion corresponding to the portion that becomes the blank plate of the die.
[0014]
Furthermore, in the plastic sheet blank plate manufacturing apparatus, the protruding elastic body is adhered along the entire surface excluding the portion where the ruled blade inside the cutting blade is raised and along the outside of the cutting blade. It is good also as a structure.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a plan view of a die used for carrying out the processing method of the present invention, and FIG. 2 is a plan view of the present invention. It is a top view of the blank board for boxes manufactured by enforcing a processing method.
[0016]
The die used for the processing method of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a die, which is a box blank plate on the peripheral edge of the surface of the base material 2 made of a veneer plate, a plastic plate or the like. A cutting blade 3 having a shape capable of forming a ridge is provided so as to stand upright on the surface side through the base material 2. Reference numeral 4 denotes a plurality of ruled blades, which are erected vertically and horizontally on a predetermined position surface side inside the cutting blade 3. The punching blade 3 is for punching a plastic sheet, and the ruled blade 4 is for providing a folding ruled line on the plastic sheet, each having a predetermined shape and size. Is formed.
[0017]
Next, 5 and 6 are elastic bodies (protruding rubbers), which stick out along the entire surface excluding the part where the ruled blade 4 is erected on the inside of the cutting blade 3 and the outside of the cutting blade 3. Has been. As materials for these protruding elastic bodies 5 and 6, plastic materials such as urethane sponge and polyvinyl chloride, natural or artificial rubber materials, corks or spring materials, etc. are used, respectively. Actually, the die 1 is mounted in parallel on the same base material 2 in consideration of the area of the plastic sheet and the production efficiency.
[0018]
The thickness of the protruding elastic bodies 5 and 6 used in the practice of the present invention is such that the thickness of the protruding elastic bodies 5 and 6 is higher by about 0.1 to 7 mm than the cutting edge protrudingly provided on the die 1. When the height of the surface of the protruding elastic bodies 5 and 6 is too low, the force for pressing the surface of the plastic sheet to be punched is insufficient, and the punched blank plate for box causes deflection and distortion. There is. On the other hand, if the height of the surface of the protruding elastic bodies 5 and 6 is too high, the punching pressure of the punching machine becomes excessive, or the protruding elastic bodies 5 and 6 obstruct the pulling operation of the die 1 and the cutting blade There is a problem that the punching of 3 and the pressing of the ruled blade 4 are insufficient.
[0019]
Therefore, it is necessary to determine the thickness of the protruding elastic bodies 5 and 6 by sufficiently considering the material and hardness of the protruding elastic bodies 5 and 6. Further, when sticking the protruding elastic bodies 5 and 6 to the surface of the base material 2 of the die 1, an adhesive or a double-sided adhesive tape is used, and the entire inside and outside of the inside with the cutting blade 3 as a ridge. Can be attached to each.
[0020]
In carrying out the processing method according to the present invention, the punching die 1 having the structure as described above is set in a punching machine, a sheet-fed plastic sheet is supplied to the punching machine, and the plastic sheet is pressed by the punching die 1. A blank sheet 8 for plastic box having a folding line 7 inside as shown in FIG. 2 is manufactured by punching a plastic sheet with the punching blade 3 and simultaneously pressing with the ruled blade 4. I can do it.
[0021]
The box blank plate 8 processed with the die 1 in this way is the entire surface of the plastic sheet (box blank plate) surrounded by the cutting blade 3 when the plastic sheet is pressed with the die 1 with the die 1. Since it is projected and supported by the elastic body 5 at the same time, it is simultaneously pressed by the ruled blade 4, so that even if the plastic sheet of the ruled part is expanded, the plastic sheet will not be bent or distorted. Accordingly, it is possible to manufacture the box blank plate 8 having a flatness and smoothness close to those of the plastic sheet before processing.
[0022]
In the above-described embodiment, the method has been described in which the punching blade 3 and the ruled blade 4 are provided in parallel on the base material 2 of the punching die 1 and the punching process and the ruled line process are simultaneously performed on the plastic sheet. Such punching and ruled line processing can be performed separately as will be described below. That is, only one cutting blade 3 is provided in one die 1, only the ruled blade 4 is provided in the other die 1, and a plastic sheet is first punched with the die 1 provided with the cutting blade 3. Then, the plastic sheet can be subjected to ruled line processing with the die 1 provided with the ruled blade 4. Alternatively, a blank plate can be manufactured by processing a ruled line with the ruled blade 4 and then punching a plastic sheet with the cutting blade 3.
[0023]
As described above, even when the punching process and the ruled line process are separately performed, the processed plastic sheet needs to be supported by the protruding elastic body 5 provided on the entire inner surface of the cutting blade 3. In particular, when a ruled line is applied to the plastic sheet with the ruled blade 4, the plastic sheet at the portion where the ruled line is pressed is expanded as described above, so that the periphery protrudes and is supported by the elastic body 5, and is bent by the plastic sheet. It is necessary not to cause distortion.
[0024]
〔Example〕
A veneer plate having a size of 920 × 600 mm and a thickness of 18 mm was used for the entire base material 2, but the one shown in FIG. 1 is an enlarged one-sixth portion of the base material 2. A punching blade 3 having a height of 6 mm was planted on the peripheral edge of the base material 2 to stand upright. A plurality of ruled blades 4 having a height substantially equal to the punching blade 3 are arranged vertically and horizontally at a predetermined position inside the punching blade 3, and the base material 2 is the same as the punching blade 3. It was planted on the surface of the building and stood upright.
[0025]
In addition, a plastic protruding elastic body (trade name “Green Soft”, manufactured by Yukiko Shito Trading Co., Ltd.) 5 having a wall thickness of 8 mm is disposed on the inner side of the cutting blade 3 excluding the portion where the ruled blade 4 is implanted. The entire surface of the base material 2 was adhered with an adhesive. Further, a protruding elastic body 6 having a width of about 7 mm (using the same material as the protruding elastic body 5) was adhered to the surface of the base material 2 outside the cutting blade 3 with an adhesive.
[0026]
Next, the die 1 having the above-described structure is set in an automatic flat plate punching machine (trade name “TRP-1060-SE”) manufactured by Sanwa Manufacturing Co., Ltd., and is 0.3 mm thick manufactured by Idemitsu Petrochemical Co., Ltd. While the transparent sheet plastic sheet (trade name “Super Pure Lay”) is supplied to the automatic flat plate punching machine at a speed of 2,000 sheets per hour, the plastic sheet is punched and creased by the above-mentioned die cutting. A box blank plate 8 as shown was produced.
[0027]
Further, the box leaf blank plate 8 configured as described above is supplied to an automatic folding and pasting machine of Asma Machine, bent along a crease-folded folding curve, and provided in the margin provided on the box blank plate 8. A plastic box folded into a flat shape was manufactured by gluing and bonding.
[0028]
The plastic box manufactured in this flat shape is opened manually, side flaps (flaps provided on both sides of the opening) are folded, and the flap is inserted into the opening of the box to form a three-dimensional hollow When the box was formed, it was possible to manufacture a plastic box with a flat and beautiful appearance with less deflection and distortion on each side of the box. In addition, as a result of automatic box making using a cartoning machine (trade name: KCV type) manufactured by OMM Manufacturing Co., Ltd., without manually making the box as described above, box opening, side flap folding, and box opening In addition, it was possible to accurately and smoothly perform the work of inserting the insertion flap into the plastic box, and it was possible to produce a plastic box with less deflection and distortion on each side at a high speed as in the case of manual boxing.
[0029]
[Comparative example]
The punching die of the above embodiment is used as it is, and the protruding elastic body 5 is not attached to the entire inner surface of the punching blade 3 as in the above embodiment, but only around the cutting blade 3 inside the punching blade 3. After sticking with a narrow width, a plastic box folded into a flat shape was manufactured by performing stamping and ruled line processing and bending pasting process in the same process as in the above example.
[0030]
Next, when the plastic box manufactured in this way was assembled manually, deflection and distortion occurred on each side of the box, and the surface was undulating, resulting in a box with an extremely poor appearance. Furthermore, when the plastic box folded into a flat shape is supplied to the same cartoning machine as in the previous embodiment and automatic box making is performed, the side flaps of the box are not bent or the insertion flap opens smoothly. Something that could not be inserted into the department occurred. Therefore, it became clear that there were many things that could not be boxed in a complete plastic box.
[0031]
【The invention's effect】
Since the plastic sheet punching method according to the present invention has the above-described configuration and operation, the following great effects can be obtained by implementing the processing method of the present invention.
[0032]
(1) In the processing method of the present invention, since the entire inner surface of the plastic sheet protrudes and is supported by an elastic body, punching with a cutting blade and ruled pressing with a ruled pressing blade are performed. There is no distortion. (2) Therefore, when a box is configured using the box blank plate, uneven surfaces due to deflection or distortion are not formed on each surface of the box.
[0033]
(3) Moreover, since the box blank plate manufactured by the processing method of the present invention has no deflection or distortion, even when supplied to the automatic folding and pasting machine in the next process, there is no feed error and smooth operation. And it can be processed at high speed. (4) Further, even when automatically making a box with a cartning machine, it is possible to automatically and smoothly make a box by accurately performing operations such as inserting a flap into the opening.
[Brief description of the drawings]
FIG. 1 is a plan view of a die used for carrying out a processing method of the present invention.
FIG. 2 is a plan view of a box blank plate manufactured by carrying out the processing method of the present invention.
[Explanation of symbols]
1 Punching die 2 Base material 3 Punching blade 4 Ruled blade
5,6 Protruding elastic body 7 Folding curve 8 Blank board for box

Claims (4)

In a plastic sheet blank plate manufacturing method in which ruled line processing is performed on a plastic sheet or a developed plastic sheet of a box using a mold in which a cutting blade and a ruled blade are implanted in a base material, the blank of the mold A protruding elastic body higher than the cutting edge planted in the punching die is attached to almost the entire surface corresponding to the plate portion, and processing is performed while supporting almost the entire surface of the plastic sheet with the protruding elastic body. A method for producing a blank sheet of a plastic sheet. 2. The plastic sheet blank plate according to claim 1, wherein, when the plastic sheet is punched with a punching blade, the blanking plate and the ruled line processing are simultaneously performed while supporting substantially the entire surface of the blank plate portion with a protruding elastic body. Production method. Corresponding to the part that becomes the blank plate of the mold in the device that performs the ruled line processing on the plastic sheet in the development drawing of the plastic sheet or box using the mold with the cutting blade and the ruled blade embedded in the base material An apparatus for manufacturing a blank plate of a plastic sheet, characterized in that a protruding elastic body higher than the cutting edge planted in the die is attached to substantially the entire surface of the plastic sheet. 4. The plastic sheet blank according to claim 3, wherein the protruding elastic body is adhered along the entire surface excluding a portion where the ruled blade inside the cutting blade is raised and along the outside of the cutting blade. Board manufacturing equipment.

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