JP2777527B2 - Manufacturing method of package with exterior film - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package for continuously and efficiently performing a finishing step of a package using a tightening step by heat shrinkage of a heat shrinkable film around a body or a lid of the package. The present invention relates to a method for producing a body.

[0002]

2. Description of the Related Art Heretofore, by utilizing the heat shrinkage property of a heat-shrinkable film which is mainly shrunk in a stretching direction when heated, the cover portion of the package is integrally formed with the body outside the cover portion of the package. Finishing process of the package such as virgin seal in the finishing process of fixing and sealing the lid (commonly called cap seal) and covering of the label attached to the body of the package or labeling of the label made of the heat shrink film. Have been done. In such a finishing step, a ring-shaped cylindrical film that contracts in the circumferential direction is required. The diameter of this ring-shaped film should be slightly larger than the circumference of the package,
This is placed around the package and then heated to shrink in the circumferential direction. At this time, since the circumferential direction of the cylindrical film shrinks, the diameter of the cylindrical film is reduced, and the periphery of the package is fastened and fixed. At this time, in order to shrink the annular heat-shrinkable film used in the circumferential direction, the film must be stretched in the circumferential direction. In the production of such a heat-shrinkable ring-shaped film, first, a long film is stretched in the transverse direction with respect to the longitudinal direction, and then both edges are heat-sealed to produce a tubular film. After covering this around the lid of the package, or before covering, the end of the tubular film is cut off to separate the ring-shaped film, and the step of heating and shrinking this to tighten the package is performed. (Japanese Patent Laid-Open No. 4-8)
7933, JP-A-4-87915, JP-A-4-102533). This process has many problems, as listed below. In the stretching process of the film, the stretching process in the transverse direction with respect to the winding direction requires a complicated and expensive apparatus compared to the stretching process in the winding direction. It is necessary to perform a process of forming a sheet-like film and then heat-sealing to form a tube-like film. Light and unstable shaped tubular films are very difficult to float in the air and continuously install around the bottle. For this reason, the machine for the film installation operation becomes complicated, and it is not possible to use a film having a very small thickness. In view of the fact that these bottlenecks do not require much cost in the finishing process of the package, this improvement is urgently required to reduce the finishing cost.

[0003]

SUMMARY OF THE INVENTION Using a heat-shrinkable film tape stretched in a longitudinal direction with respect to a longitudinal direction, a process of finishing a package in which a ring-shaped heat-shrinkable film can be easily and continuously installed around a package. It is intended to provide.

[0004]

In contrast to the conventional method using a tubular film stretched in the transverse direction, the inventors of the present invention have performed a packaging process using a tape-like film stretched in the longitudinal direction. It is an inevitable process to wind the tape film around the package and then seal both ends of the film.When such a tape film is wound around the package and cut, It is indispensable for the continuous process to fix the leading end of the long film so that it does not separate.As a fixing method, the leading end of the tape-like film is attached to the leading end of the other film using fusing. The present invention has been completed by conceiving a method of facilitating the operation of winding the package around the next package by fixing the package.

That is, the present invention comprises the following aspects. (1) A heat-shrinkable raw film stretched in the longitudinal direction is sent out from two raw film supply rolls, and the front end of the raw film is welded by a fusing seal at an intermediate position between the two rolls. To the sides of the web, approach the package from a direction perpendicular to the surface of the web, apply a predetermined side of the package to the web, and wind the web around the predetermined side. The film that has wrapped around the side surface of the package is melted at the position where the film overlaps to form a cylindrical film around a predetermined side surface of the package, and the direction opposite to the direction in which the package mounted with the cylindrical film is approached. Then, the tubular film on the side of the package is heated and shrunk to complete the film exterior, while the ends of the raw material remaining after separating the tubular film are connected to each other by the fusing. And applying a tension thereto to form the same original film as the first one, applying a predetermined side surface of the next package to this original film, and repeating the above-mentioned process, wherein the packaging with the outer film is repeated. How to make the body. (2) The heat-shrinkable raw film stretched in the longitudinal direction is continuously fed from one raw film supply roll,
In a state where the end of the source film is tensioned by a fusing seal to the source film welded to the end of the film from the descaling roll, the package is approached from one side of the source film, The raw film is wrapped around a predetermined side of the body in a tubular shape, and at a position where the raw film that has circulated around the package is superimposed, the overlapped portion is blown off and cut off, and the cylindrical film is packaged. Formed around a predetermined side surface of the package, and cuts the package attached with the tubular film from the raw film in a direction opposite to the approaching direction, and then heats the tubular film on the package by heat shrinkage. Along with completing the film exterior, by fusing, the leading end of the raw film and the film on the scraping roll side are connected, and then the next package is approached to this raw film. Manufacturing method of the package film with package, characterized by repeating the serial process.

The heat shrinkable film tape used in the present invention is
It is possible to use a thin, long thermoplastic film sheet which has been stretched in the machine direction at a stretch ratio of 2 to 6 times in the longitudinal direction, and a material having a maximum heat shrinkage of 15 to 80% is appropriately used. be able to. In some cases, a biaxially stretched film can also be suitably used. As the thermoplastic resin for the heat-shrinkable film used in the present invention, a known resin for a heat-shrinkable film can be used without any particular limitation, for example, polyethylene, polypropylene, vinyl chloride resin, polystyrene, polyester, vinylidene chloride copolymer. Coalescence and the like can be used. The thickness of the heat-shrinkable film tape used in the present invention is not particularly limited and can be appropriately selected depending on the application. In particular, in the present invention, since the operation can be performed while fixing the leading end of the film tape, for example, 10 to 10 A thin film having a thickness of about 30 μm can be suitably used. As the package used in the present invention, a package conventionally packaged with a heat-shrinkable film can be applied without any particular limitation, and is particularly suitably applied to a glass or plastic bottle package as shown in FIG. be able to. The fusing step employed in the present invention can be performed by a conventional fusing method for processing a plastic bag, and a hot blade heated higher than the melting point of the raw film is pressed against two superposed films. The film is melted and cut, and the upper and lower two films on both edges separated by cutting are heat-sealed.

The present invention will be described in further detail with reference to the drawings. FIG. 1 is a process diagram of one embodiment in which a cover (cap seal) of a heat-shrinkable film is installed on a cap C of a package (not shown; only a cap is shown in the figure). The figure is a drawing viewed from above vertically.
First, as shown in FIG. 1a, both ends of the heat-shrinkable raw films 2 and 3 supplied from the raw film supply rolls 4 and 5 supported on the vertical shafts located at both ends are located at the center of the figure, and the fusing seal portion S Linked by _one . The connected heat-shrinkable raw film is stretched between two raw material supply rolls so that the heat-shrinkable raw film having a width slightly larger than the cap C of the package 1 is adjusted to the height at which the cap C is located. I have. A pair of tension adjusting rolls 9 and 10 at the outlets of the raw material supply rolls 4 and 5 are pulling the heat-shrinkable film tape so that a constant weak tension is applied to the heat-shrinkable film tape. When the heat shrink film tape is pulled by force, the material supply roll 4
The heat-shrinkable film tape can be pulled out of the heat-shrinkable film tape from the first and the fifth through the tension adjusting rolls 9 and 10. The adjustment of the tension can be performed by controlling the motors of the tension adjusting rolls 9 and 10. Moreover, the photocell detects the position of the heat-sealing portion S _1, adjusted to come rotary tensioning rolls by this information in the regulation to just beside the position of the heat-sealing portion S ₁ is cradle 8 back and forth be able to. The package 1 on which the exterior is to be constructed is fixed to a conveyor (not shown), approaches the heat-shrinkable raw film from the left side of the heat-shrinkable film tape in a vertical direction, and winds the heat-shrinkable film on the label. After that, pass through the right side of the heat shrinkable film. Conveyor movement is intermittent,
When one particular package moves from FIG. 1a to the position of FIG. 1d and stops, the next package comes to the position of FIG. 1a and stops. Before that, the preceding package is shown in FIG.
It moves to the next heat treatment step from the position of d and stops.
As the conveyor used in this embodiment, any mechanism can be used without limitation as long as the package is fixed and moves one pitch.

For example, in order to fix a portion of the package other than the side to be exteriorized, one that fixes the bottom or body of the package or one that moves one pitch while holding the lid of the package is used. be able to. In FIG. 1a, the package 1 fixed to the conveyor approaches the heat-shrinkable raw film from the left side, and further presses the raw film until the side of the cap C is pressed against the cradle 8 that has descended from above. move on. At this time, the heat-shrinkable raw film is sandwiched and fixed between the receiving stand 8 and the center of the label, and the state shown in FIG. Next, the guide bars 6 and 7 provided on both sides of the receiving table 8 are operated, and the guide bar 6 is pressed while pressing the heat-shrinkable film tape against the side surface of the cap C of the package 1.
Move in the order of LMN in FIG. 1b, and the guide bar 7 moves on the side surface of the package cap C in the order of LPN. As the guide bar, a roll having a rotating surface can be used in addition to a simple metal rod. By the action of the guide bars 6 and 7, the state shown in FIG.
The original film is wound around the cap C of the package in the state of FIG. Guide bar 6
The heat-shrinkable film tape is wound substantially tightly along the circumference of the package 1 by the action of (7) and the tension of the tension adjusting rolls (9) and (10). Then, the guide bars 6 and 7 in the state of the position of d in FIG.
Are sandwiched between two heat-shrinkable raw films and stopped.
At this time, the fusing mechanism 11 descends from above. As shown in FIG. 3, two heat-shrinkable film tapes are first fixed by metal plates 12 and 13 and then superposed by a hot blade 14 sliding along the surface of one metal clip 13 as shown in FIG. And the raw film wound around the package is separated as a cylindrical film F. This blown, blown seal portion R is formed in a cylindrical shape film F side, the raw film side heat-sealing section S ₂ is formed. When the metal plates 12 and 13 are opened, the fusing seal portion R passes between the guide bars and the tubular film F is cut off.

[0009] Alternatively, this fusing is illustrated in FIG.
It can also be implemented between the guide bars 6 and 7 and the cap C. Due to this fusing, the heat-shrinkable film tape wound around the cap C is separated, and the ends of the wound heat-shrinkable film tape are connected by the fusing seal portion R, so that the heat-shrinkable film tape is wound around the cap C of the package 1. The film is formed, and the package is separated on the opposite side of the raw film. Next, the cradle 8 is lifted up and removed, the conveyor on which the package is fixed is moved one pitch to the right, and hot air is blown around the cap C at that position to shrink the heat-shrinkable film. When holding the separated cylindrical film F around the cap C is unstable,
After the heat shrinkage starts and the film partially shrinks,
Can be removed. The cylindrical film F is a heat-shrinkable film that has been stretched in the circumferential direction. Since the width of the cylindrical film F is larger than the height of the cap C, the upper and lower edges of the cylindrical film are formed by the action of tension at the time of winding. Since the film is bent so as to enclose the upper and lower edges of the film C, the film can be held at the wound position as it is, even if the film is not supported by a receiving stand or the like. Further, a method can also be adopted in which a frictional material by a guide bar or a frictional substance that slides on a heat-shrinkable film tape is separately provided, and the heat-shrinkable film tape is charged and adsorbed on the package.
On the other hand, the fusing step, fusing seal S ₂ separated from the package body are connected to the tip of the raw film, to restore the initial state of FIG. 1a under tension thereto, the next package Used for construction of the exterior of the cap. In this embodiment,
During the fusing operation of FIGS. 1d to 1e, the immediately preceding package has undergone heat shrinkage at the next conveyor stop, completing the cap seal. The next package is waiting at the position of FIG. 1A, and when the fusing operation is completed, moves to the fusing process section of FIG. 1D by the next one-pitch movement. As shown in FIG. 2, the cap seal obtained by the above-described embodiment of the present invention has a seal portion of the cap seal vertically extending to R and S ₁ .
There are places, which is convenient when removing the cap seal.

Referring to FIG. 4, another embodiment of the present invention, in which the packaging of the label of the body of the package body by the film is applied. In FIG. 4, the heat-shrinkable film tape fed from the heat-shrinkable film tape supply roll 5 is connected to the leading end of the waste film coming out of the waste removing roll 51 via the tension adjusting roll 10 and the tension adjusting roll 9. On the right side of the heat-shrinkable film tape of FIG. 4a, a guide bar 6, a guide bar 7, and a cradle 8 are installed as in the embodiment of FIG. The point that a weak tension is applied to the heat-shrinkable raw film 3 by the tension adjusting roll 10 and the tension adjusting roll 9 is similar to the embodiment of FIG. Also,
Also, the position of the _first fusing seal portion S1 is detected by a photoelectric tube following the source film 3, and the position of the fusing seal portion of the heat shrinkable film tape is controlled in the same manner as the embodiment of FIG. in a while, the embodiment of FIG. 1 in that the positioning away slightly longer distance than the distance half of the body of the package from the position opposed to the position of the heat-sealing portion S ₁ of the position cradle 8 Is different from FIG. 4 is a process diagram of one embodiment in which a cover of a heat-shrinkable film is installed on the body of the package 1, and this process diagram is a drawing viewed from a vertical upper direction. First, as shown in FIG. 4A, the leading end of the heat-shrinkable film tape 3 supplied from the raw material supply rolls 5 supported on the vertical shafts located at both ends is moved from the center receiving stand 8 to the dust removing roll 51 in the direction of the package body. Approximately 1cm from the half circumference of the part
Through the first heat-sealing portion S ₁ in the remote location is connected to the scrap film.

The heat-shrinkable raw film is stretched so that the heat-shrinkable raw film having a width larger than that of the label on the body of the package 1 is aligned with the label. A pair of tension adjusting rolls 9 at the outlet of the raw film supply roll 5 and a tension adjusting roll 10 at the outlet of the scrap removing roll are subjected to heat shrinkage so as to apply a constant weak tension to the heat shrinkable raw film 3. If the heat-shrinkable film tape is pulled with a force greater than the weak tension, the heat-shrinkable raw film or waste film is pulled out from the raw film supply roll 5 via the tension adjusting roll 9 or 10. Can be. The adjustment of the tension can be performed by controlling the motors of the tension adjusting rolls 9 and 10. Moreover, the photocell detects the heat-sealing portion S _1, to adjust the tensioning rolls adjusted cradle 8 the heat-sealing portion S ₁ in the rotation before and after this information to come to a position of a predetermined distance be able to. The package 1 on which the exterior is to be constructed is fixed to a conveyor (not shown) from the left side of the heat-shrinkable film tape, approaches the heat-shrinkable film tape, and winds the heat-shrinkable raw film 3 on the label. Then, it moves to the right side of the heat shrinkable film sheet. The operation of the conveyor is intermittent and one particular package is shown in FIG.
From a, when the package moves to the position of FIG. 4B and stops, the next package comes to the position of FIG. 4A and stops. Also,
Before that, the preceding package has moved from the position of FIG. 4a to the next heat treatment section and stopped. In FIG. 4a, the package 1 on the conveyor belt approached from the left side approaches the heat-shrinkable raw film 3 and comes into contact therewith until the side of the body is pressed against the cradle 8 which has descended from above. FIG. 4b
Go right until The body of the package 1 has a heat-shrinkable film tape sandwiched between the cradle 8 and the package 1,
When the guide bars 6 and 7 are operated, the raw film 3 is wound in the state shown in FIGS. 1c and 1d. From the position shown in FIG. 4a to the state shown in FIG. 4d, the heat-shrinkable film tape is almost tightly loosened along the circumference of the package 1 by the action of the guide bars 6 and 7 and the tension of the tension adjusting rolls 9 and 10. Can be wound without. Then, in the state of the position d in FIG. 4, the guide bars 6 and 7 hold the two heat-shrinkable film tapes and stop. At this time, the fusing mechanism 11 descends to the outside of the guide bar from above, and FIG.
As shown in FIG. 1, first, the hot blade 1 is fixed with the metal clips 12 and 13 and then slides into one of the metal clips 13.
The two heat-shrinkable film tapes polymerized by 4 are blown. By this fusing, the heat-shrinkable film tape wound around the cap is separated and forms a cylindrical film F. That is, the end of the heat-shrinkable raw film 3 wound by the fusing seal portion R is fused to form a cylindrical film F around the body of the package 1.

Next, the cradle 8 is pulled up and removed,
The conveyor on which the package 1 is fixed is moved one step to the right, and hot air is blown around the body at that position to shrink the heat-shrinkable film. When the holding of the separated cylindrical film around the body is unstable, the cradle 8 can be removed from the side surface of the package after the film contracts after the thermal contraction starts. Normally, this cylindrical film is a heat-shrinkable film that has been stretched in the circumferential direction, and has a width greater than the height of the body portion. Since the edge is bent so as to enclose the upper and lower edges of the body, the film is held in the wound position as it is, even if the film is not supported by a receiving stand or the like. Further, a method can also be adopted in which a frictional material by a guide bar or a frictional substance that slides on a heat-shrinkable film tape is separately provided, and the heat-shrinkable film tape is charged and adsorbed on the package. On the other hand, the fusing seal S ₀ on the web film separated from the package by the fusing step connects the new tip of the web film 3 slightly before the fusing seal portion S ₁ , and returns to the initial state in FIG. It is restored and provided for the construction of the label exterior of the next package. A film having a fusing seal portion is wound around the dust removing roll 51 little by little. In this embodiment, during the fusing operation shown in FIGS. 1d to 1e, the immediately preceding package is subjected to heat shrinkage at the stop position of the next conveyor to complete the label film packaging. The package to be processed next is waiting at the position shown in FIG. 4A, and when the fusing operation is completed, moves to the fusing section in FIG. 1D at the next pitch. FIG.
In the case where film exterior finishing is performed according to the embodiment, there is only one fusing seal portion of the exterior film, and this is applied to the fusing seal portion R at the break of the label on the front of the bottle back as shown in FIG. Lines can be matched.
Therefore, the fusing seal portion does not cover the label and does not obstruct the character and pattern of the label. When used for protecting a label, the heat-shrinkable film is preferably transparent.

[0013]

According to the present invention, the cap seal, the packaging of the label, and the labeling can be carried out by a continuous process using the heat-shrinkable film tape stretched in the longitudinal direction in the packaging process using the heat-shrinkable film. In addition, since the raw film can be cut by fusing, and the leading end of the raw film can be fixed to the leading end of the other film, the outer packaging operation for the next package is easy, and a thinner film than usual can be used. There is also an advantage that the cost of film exterior can be reduced.

[Brief description of the drawings]

FIG. 1 is a process diagram illustrating a sequence of steps of one embodiment of the present invention.

FIG. 2 is a perspective view of a package body whose exterior is finished according to the present invention.

FIG. 3 is a side view of an example of a fusing mechanism used in the present invention.

FIG. 4 is a process chart illustrating a sequence of steps of a method according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Package 2, 3 Raw film 4, 5 Raw film supply roll 51 Dust removal roll 6, 7 Guide bar 8 Receiving stand 9, 10 Tension adjusting roll 11 Fusing mechanism 12, 13 Metal plate 14 Hot blade S, R Fusing Seal part B Packaging bottle C Cap D Label F Cylindrical film

Claims (4)

(57) [Claims] 1. A heat-shrinkable raw film stretched in a longitudinal direction is sent out from two raw film supply rolls, and the front end of the raw film is welded by a fusing seal at a position between the two rolls. Pull the anti-film on both sides,
The package is approached from a direction perpendicular to the surface of the source film, a predetermined side of the package is applied to the source film, and the source film is wound around the predetermined side, and the side of the package is wrapped. Fusing at the position where the film around
A cylindrical film is formed around a predetermined side surface of the package, and the package on which the cylindrical film is mounted is separated in a direction opposite to the approaching direction, and then the cylindrical film on the side of the package is heated. To shrink the film to complete the film exterior, while separating the tubular film and connecting the tips of the remaining stock to each other by fusing, applying tension to this to form the same stock film as the first. A method of manufacturing a package with an exterior film, comprising: applying a predetermined side surface of the next package to the raw film and repeating the above steps. 2. A process of winding the raw film while approaching the original film plane in a direction perpendicular to the plane of the raw film by one pitch, fixing the package to a conveyer passing therethrough, and stopping at a position of the raw film. 2. The method according to claim 1, wherein the preceding package is subjected to an exterior step by heat shrinkage at the next stop position of the conveyor. 3. The heat-shrinkable raw film stretched in the longitudinal direction is continuously fed from one of the raw film supply rolls, and the front end of the raw film is fused by a fusing seal, and the leading end of the film from the descaling roll. In a state in which tension is applied to the source film that is welded to the source film, the package is approached from one side of the source film, and the source film is wound around a predetermined side surface of the package in a tubular shape, and At the position where the raw film that has circulated around is overlapped, the overlapped portion is blown off and cut off to form a tubular film around a predetermined side surface of the package, and a package in which the tubular film is attached. The body is cut off from the source film on the opposite side to the approaching direction, and then the tubular film on the package is heated and thermally contracted to complete the film exterior, and by the fusing, In conjunction with the tip and the dregs-up roll side of the anti-film film, then, the production method of the outer film with package, characterized by repeating the step is brought closer to the next package in the raw film. 4. The step of winding the raw film while approaching the raw film plane in a direction perpendicular to the plane of the raw film by one pitch and fixing the package to a conveyer passing therethrough and stopping at the position of the raw film. 4. The method for manufacturing a package with an exterior film according to claim 3, wherein at the same time, the preceding package performs an exterior step by heat shrinkage at a next stop position of the conveyor.