WO2005084923A1 - プラスチック容器加工装置における罫線入りプラスチックシートの加圧接着装置 - Google Patents
プラスチック容器加工装置における罫線入りプラスチックシートの加圧接着装置 Download PDFInfo
- Publication number
- WO2005084923A1 WO2005084923A1 PCT/JP2004/004526 JP2004004526W WO2005084923A1 WO 2005084923 A1 WO2005084923 A1 WO 2005084923A1 JP 2004004526 W JP2004004526 W JP 2004004526W WO 2005084923 A1 WO2005084923 A1 WO 2005084923A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- plastic sheet
- adhesive
- plastic
- pressing
- sheet
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
- B31B50/60—Uniting opposed surfaces or edges; Taping
- B31B50/62—Uniting opposed surfaces or edges; Taping by adhesives
- B31B50/624—Applying glue on blanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
- B31B50/60—Uniting opposed surfaces or edges; Taping
- B31B50/62—Uniting opposed surfaces or edges; Taping by adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
- B31B50/60—Uniting opposed surfaces or edges; Taping
- B31B50/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure, e.g. by welding
Definitions
- the present invention relates to a plastic container processing apparatus for processing a container or the like from a thermoplastic sheet such as PET (polyethylene terephthalate) and the like.
- the present invention relates to a pressure bonding apparatus for a plastic sheet having a pressure section capable of solidifying an adhesive by pressing.
- the base material for forming packaging containers such as PET bottles is a thermoplastic plastic sheet such as PET.
- Plastic sheets are shipped from plastic manufacturing companies in long rolls, cut into sheets of a predetermined shape before processing in the intermediate process, and a line is drawn into a shape that can be assembled by an automatic packaging machine.
- the containers When shipped from a factory to various fields of use (eg, department stores, stationery stores, cosmetics companies, etc.), the containers are not assembled, but are cut into sheets (sheet shape) or immediately formed into container shapes. Glue as much as possible and ship the containers in a crushed state. Recently, since gluing can be done by machine, it is usually shipped in the latter shape.
- Patent Document 1 Japanese Patent Laid-Open Publication No. H06-144349 / 1992; hereinafter, referred to as Patent Document 1). Therefore, the outline from plastic sheet to gluing described in Patent Document 1 will be briefly described here (however, the symbol ⁇ number> in the drawing has been changed).
- Figure 1 shows a plastic sheet that has been die-cut and has a ⁇ -line blade and a ⁇ -line.
- 232, 233, 234, 235 are the lines corresponding to the sides 221, 222, 223, 224 of the box, and 225 is the glue allowance (231 corresponds to the side edge, bottom and lid surface ⁇ line is abbreviated symbol).
- 211, 212, 213, 214, 215, 216 form the bottom of the box, 24 1, 242, 243, and 244 are parts to be the lid of the box.
- Figure 2 shows the shape when it is bent to the side along the bottom line, the adhesive is dripped at 225, 225 and 221 are bonded, and further bent at the side lines 234 and 232. . At this time, the glue allowance 225 and the side surface 221 overlap.
- FIG. 4 shows the structure of the adhesive dripping device 4.
- FIG. 5 is a side cross-sectional view of the pressurizing device 5, and the folded sheet 2 moves to the next step while being pressed by the upper conveyor belt 504 and the lower conveyor belt 505.
- the pressurizing device consists of a support member 501, a spring 502, a pressure roller 503, and a conveyor belt 504 (the lower part has the same structure, so details are omitted).
- the support member and the pressure roller are connected by a spring.
- the elastic force of the spring is transmitted to the roller, and a certain force is applied to the conveyor belt.
- the box manufacturing equipment we have seen in the background art is an apparatus for assembling containers such as boxes from plastic sheets, by dropping adhesive onto the glue margin, overlapping the glue margin with the bonding surface, and applying a pressure device. Enables uniform bonding.
- the pressurizing device has both a sheet conveyor (moving) and pressurizing, and enables uniform bonding of the adhesive while moving.
- the excess adhesive discharged by the adhesive dropping device is collected, returned to the adhesive dropping device, and can be reused. But it is not without its problems.
- One of them is pressurization by the mouth, so that at a certain point in time, the pressure on the superposed sheets is not uniform, and the superposed sheets are separated at the part between the mouth and the roller. Under such circumstances, uneven bonding may occur, and this unevenness may cause cloudiness at the bonding portion (adhesive margin), impairing the transparency of the product,
- the problem to be solved by the invention is that, when processing a plastic product such as a container from a plastic sheet, the above-mentioned uneven bonding occurs in a process of bonding a part of the sheet with an adhesive.
- An object of the present invention is to develop a pressure bonding apparatus which does not have a pressure bonding apparatus, and to develop a plastic sheet processing apparatus having the pressure bonding apparatus which enables uniform and stable bonding.
- the present invention provides an adhesive sheet to a glue margin portion of a plastic sheet containing a ⁇ -ray, and a plastic sheet with a plied-line which is adhered by pressing the adhesive portions together.
- the present invention according to claim 2 is the pressure bonding apparatus for a plastic sheet with a voice line according to claim 1, wherein a surface of the sliding pressure plate in contact with the transport belt is a flat surface.
- the present invention according to claim 3 is characterized in that an elastic member is provided for urging in the direction of the plastic sheet containing the ⁇ -line, which sandwiches the sliding pressure plate, and pressurizes the plastic sheet containing the ⁇ ⁇ -line. It is a bonding device.
- a plurality of springs are usually used side by side.
- the pressure bonding apparatus for the plastic sheet containing the ⁇ -rays handled by the present invention is basically the same type as the box manufacturing apparatus of Patent Document 1 mentioned in the background art.
- the process of manufacturing plastic containers involves the following steps: die-cutting, drawing, folding, bonding, pressurized solidification, stacking (accumulation), etc. from a long roll-shaped plastic sheet in the form of a development drawing of the target container.
- the present invention is an apparatus relating to a pressure coagulation step of an adhesive.
- Conventionally, in the pressure coagulation process a plurality of pressure rollers are arranged and pressed on the back side of a conveyor belt that conveys while sandwiching an adhesive portion. The reason for using the pressure roller is to avoid friction with the conveyor belt.
- Rollers were considered to be optimal because friction generated heat due to friction, which had a negative effect on barrel machines and products.
- linear pressing is performed, and uniformity is achieved by moving the linear pressing (conveying the plastic sheet).
- adhesives with a high solidification rate often had unevenness.
- Figure 6 shows the probable cause.
- the folded plastic sheets 201 and 202 to which the adhesive 6 (corrugated line in the figure) is attached move.
- a small gap may be generated between the overlapping plastic sheets between the rollers. This is because the roller 503a and the roller 503b are linearly pressed, so that a portion where no pressure is applied is distorted.
- the outside of the belt (the surface in contact with the plastic sheet) is roughened with a high coefficient of friction.
- the surface in contact with the belt should be polished smoothly.
- a spring can be used to apply pressure to the sliding pressure plate.
- This structure is a structure in which a spring is arranged between the support member and the sliding pressure plate, as in the case of using the roller of Patent Document 1. Uniform pressure is applied to the conveyor belt, because the plastic sheet has been improved to slide from the back side of the conveyor belt and pressed by the pressure plate, instead of the conventional roller pressing which was linear pressing.
- Figure 1 is an exploded view of a box (plastic container) made of a plastic sheet that has been cut to produce a box.
- FIG. 2 is a top view of the plastic sheet when the box body of FIG. 1 is folded along a flat line.
- FIG. 3 is a cross-sectional view of a suction device / guide member in the adhesive application device and a plastic sheet in the device.
- FIG. 4 is a cross-sectional view of the adhesive dropping device.
- FIG. 5 is a cross-sectional view of a roller-type pressing device.
- FIG. 6 is a cross-sectional view of a roller, a conveyor belt, and a plastic sheet in a roller-type pressurizing device for explaining a problem of the device.
- FIG. 7 is a cross-sectional view of the pressure bonding apparatus of the present invention.
- FIG. 8 is a perspective view of a container assembled from the die-cut plastic sheets.
- FIG. 9 is a cross-sectional view of a sliding pressure plate, a conveyor belt, and a plastic sheet in the pressure bonding apparatus of the present invention, for explaining a pressing state of the plastic sheet in the apparatus.
- FIG. 7 is a sectional side view of the plastic sheet pressure bonding apparatus of the present invention.
- the plastic sheet pressure bonding device 1 of the present invention is an alternative to the roller type pressure device 5 described in the background art. It constitutes one component of the container manufacturing process of the plastic container processing device. Die-cutting, sizing, folding, and adhesive dropping follow the conventional process. Therefore, until the adhesive is dropped on the container, the procedure described in Patent Document 1 is performed as it is in the present invention.
- the die-cut plastic sheet shown in FIG. 1 is a box-shaped container as shown in FIG. 8 when completed. become.
- the glue margin 225 is located inside the side face 221, but in the case of a transparent plastic sheet, the glue margin can be seen from the outside. For this reason, if the adhesive is solidified unevenly or solidified with air bubbles in it, an opaque portion is formed and the appearance is deteriorated.
- the advantage of a transparent container is that the goods contained in the container are visible to the customer. Although the container protects the product, any dirt on the transparent container will make the contents of the product unattractive. Especially in the case of products such as cosmetics, the image is important, and the containers must also create a sense of cleanliness commensurate with it. That is the significance of the pressure bonding apparatus of the present invention. In FIG.
- the conveyor belts 111 (upper side) and 112 (lower side) are pressed by a sliding pressure plate 121.
- the pressing mechanism 120 has the same structure as the pressing mechanism in FIG. 5, and the pressing roller in FIG. 5 is replaced with a flat plate. That is, the pressure bonding apparatus 1 of the present invention has a structure in which the spring 122 is disposed between the support member 123 and the sliding pressure plate 121 to press the upper and lower transport belts 111 and 112.
- the adhesive sheet dropping device 4 moves the plastic sheet 2 (folded plastic container) on which the adhesive has been dropped on the adhesive margin while moving. The adhesive solidifies.
- FIG. 9 is a diagram showing a state where the folded plastic sheet moves between the conveyor belts.
- the adhesive is dropped between the folded plastic sheets 201 and 202, and a uniform and constant force is applied to the sheet being conveyed.
- the upper sheet portion 201 in the drawing is the container side surface 221 in FIG. 8, the lower sheet portion 202 corresponds to the glue margin 225 in FIG.
- FIG. 9 is drawn in the form of double folds, as described in Patent Document 1, the overlap is partially different from triple or quadruple, and the plastic sheet is a pressurized body with a step. It has become. For this reason, the pressing force differs in some parts, but by using a flexible I "raw belt, a constant pressure can be applied to any surface.
- a plate for pressing is used. Because it is used, the folded sheet is held down by surface pressure, so that equal force can be transmitted to the sheet at any point, in other words, constant force can be transmitted to the sheet. It enables uniform and stable solidification of the adhesive.
- a uniform pressure can be applied to the conveyor belt, a constant force is applied to the plastic sheet, the adhesive spreads evenly, and the constant pressure is applied. It adheres to the sheet surface due to its thickness and can be solidified stably. As a result, there is no unevenness in the glue margin, which enables a transparent finish with no turbidity on the adhesive surface. If turbidity occurred in the transparent plastic container, there was no problem in terms of adhesion, but the appearance was poor, the product value was reduced, and the product was rejected as defective. In the present invention, the frequency of occurrence of defective products at the time of solidification of the adhesive is almost nonexistent, and the production of plastic containers with a good yield has become possible.
- the frictional heat between the conveyor belt and the sliding pressure plate is a problem.
- the problem is solved by smoothing the contact area between the belt side and the sliding pressure plate. . Therefore, there is no adverse effect on the machine or plastic sheet due to frictional heat.
- the pressure bonding apparatus itself can be manufactured in a unit type, it is possible to replace the conventional mouth-type pressing apparatus with the pressure bonding apparatus of the present invention as a part of the conventional plastic container processing apparatus. it can.
- the conventional plastic container processing apparatus can be used as it is.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Making Paper Articles (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-063647 | 2004-03-08 | ||
JP2004063647A JP2005246897A (ja) | 2004-03-08 | 2004-03-08 | プラスチック容器加工装置における罫線入りプラスチックシートの加圧接着装置 |
Publications (1)
Publication Number | Publication Date |
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WO2005084923A1 true WO2005084923A1 (ja) | 2005-09-15 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2004/004526 WO2005084923A1 (ja) | 2004-03-08 | 2004-03-30 | プラスチック容器加工装置における罫線入りプラスチックシートの加圧接着装置 |
Country Status (2)
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JP (1) | JP2005246897A (ja) |
WO (1) | WO2005084923A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2007238133A (ja) * | 2006-03-08 | 2007-09-20 | Kao Corp | 加圧具 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06143459A (ja) * | 1992-11-11 | 1994-05-24 | Suzuki Shikoushiya:Kk | 加圧装置、加圧システム、それを利用した箱体製造装置 |
JP2003340939A (ja) * | 2002-05-27 | 2003-12-02 | Suga Seisakusho:Kk | 製凾機における糊付け折畳み凾の圧着装置 |
-
2004
- 2004-03-08 JP JP2004063647A patent/JP2005246897A/ja active Pending
- 2004-03-30 WO PCT/JP2004/004526 patent/WO2005084923A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06143459A (ja) * | 1992-11-11 | 1994-05-24 | Suzuki Shikoushiya:Kk | 加圧装置、加圧システム、それを利用した箱体製造装置 |
JP2003340939A (ja) * | 2002-05-27 | 2003-12-02 | Suga Seisakusho:Kk | 製凾機における糊付け折畳み凾の圧着装置 |
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JP2005246897A (ja) | 2005-09-15 |
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