JPH0487914A - Horizontal bag-making, filling and packaging method - Google Patents

Abstract

PURPOSE:To perform a longitudinal sealing of a film with their edges kept in butted state by a method wherein the continuous tubular-shaped film with a thermoplastic upper face is continuously led to a former to butt both edges of the film, and the edges are bonded from inside with a double-thermoplastic seam-sealing tape to perform a longitudinal sealing. CONSTITUTION:A seam sealing tape T is placed on an anvil board 5 by a feed roller 10, and a strip film F is led inside a former 2 through a space between an article conveyer l and the former 2 from below and up to the downstream position of a lateral sealing-cutter 16. The film F is folded into a square tubular shape by an upright plate and a floor plate of the former 2 and a film edge butting guide, and both edges are butted together on the sealing tape F on the anvil board 5. When packaging operation takes place, the article to be packaged is sent into the former 2 by the conveyer 1, and a vacuum type belt conveyer 4 sucks the bottom face of the square tubular-shaped film F and transfers it. A longitudinal heater bar 11 is lowered to heat both edges of the tape T and the film F, and a press roller 12 presses the film F and the tape T flowing on the anvil board 5 to perform a longitudinal sealing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a horizontal bag making, filling and packaging method in which both edges of a band-shaped bag film, which is a wrapping material, are vertically sealed by vertically abutting exactly against each other.

[Prior art] In the conventional horizontal bag-form-fill-fill packaging method known as reverse billow packaging, a continuous bag strip-shaped film overcoated with a thermoplastic film on one side, which becomes the inner surface of the bag, is placed on a former. ``Continuously guide the film from below on the second flow side, and by the folding function of the former, bend it into a cylindrical shape so that the seam between the film edges is in the center of the two parts, and seal the seam between the film edges vertically. At the same time as forming a packaging cylinder, the products carried into the former at a required pitch by a carry-in conveyor are successively introduced into the packaging cylinder, and horizontal sealing is performed in two strips between the objects to be packaged in the packaging cylinder. A cut was made between the two horizontal seals.

The vertical sealing is performed by bringing the edges of the film together at the center of the upper part of the packaging tube, and sandwiching this between a pair of heater bars and a pair of film feed rolls for heat sealing. It is called 3-sided sticker packaging.

[Problems to be achieved by the invention] -I- The folding three-sided seal packaging is not neat in shape because the vertical seal portion is ribbed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a horizontal bag-forming-filling-packaging method that allows vertical sealing with film edges butted against each other.

[Means for Achieving the Object] The present invention, as a means for solving the above-mentioned problem, provides the following method: ``A continuous bag strip film having two thermoplastic sides is continuously guided to a former from the upstream side downward. Then, using the film guide function of the former, the film is bent into a cylindrical shape so that both edges of the film are placed in the center of the upper part, and both edges of the film are vertically sealed to form a packaging tube, and the product is carried in at the required pitch by the carry-in conveyor. In the horizontal bag-forming-fill-packaging method, in which the materials to be packaged are introduced into the packaging tube one after another to form two horizontal seals between the objects to be packaged in the packaging tube, and the space between the two horizontal seals is cut. It is introduced from the upstream side of the former and supports both edges of the bag strip film from the inside.
A seam sealing tape having both sides of thermoplastic is introduced and placed on the anvil plate from the upstream side of the former, and the seam sealing tape is placed on the anvil plate on the seam sealing tape. Both edges of the bag strip film are brought into contact with each other without any gaps or overlaps, and the lower surface of the bag strip film bent into a cylindrical shape by the former is received by a conveyor belt.
・Film is fed by rotating the conhair belt while vacuuming from the bottom side, so that both edges of the bag strip film that is overlamped and transferred by the two sides of the duck plate are transported. The "Joint 1" sealing tape is heated as required by a heater bar installed on the anvil plate in a small gap with respect to the anvil plate, and then, the sealing tape is heated as required by a heater bar installed on the anvil plate in a small gap with respect to the anvil plate, and then the tape is heated downstream of the heater bar on the anvil plate. By rolling the packaging tube with the installed rolling pressure roll, the packaging cylinder is joined by the seam sealing tape such that both edges of the bag strip film are abutted together and overlapped on the inner surface side by the seam sealing tape. The present invention provides a horizontal bag making, filling and packaging method characterized by having a vertically sealed structure.

[Example] Hereinafter, an example of the horizontal bag making, filling and packaging method of the present invention will be described with reference to the drawings.

First, the configuration of a horizontal bag-form-fill-seal machine for carrying out the horizontal bag-form-fill-seal method of the present invention will be explained with reference to FIGS. 1 to 5.

The horizontal bag-form-fill-packaging machine is a so-called reverse pillow packaging machine. The carry-in conveyor 1 has an endless chain 1a wrapped around the drive sprocket) and 1b and the tensioning sprocket IC.
When the product conveying claw 1d attached to the endless chain 1a with a required pinch reaches the tensioning sprocket 1c, it is raised by the guide rail 1e and is conveyed by pushing the rear surface of the packaged article W supplied onto the table 1f. Then, the article W to be packaged is sent to a former 2 located adjacently on the downstream side.

The raw roll R of the strip film for bags is inserted into the roll holder shaft 3 provided below the carry-in conveyor 1, and the strip film F for bags fed out from the raw roll R is such that the inside surface of the bag is the top surface. It is introduced into former 2 so that it becomes like this. The belt-shaped bag film F is overcoated with a thermoplastic film on one side of the required heat-resistant film, which becomes the inner surface of the bag.
In addition, a laminated film with desired printing is used on the other side, which is the outer surface of the bag.

The former 2 consists of two vertical plates 2a, 2a in the form of strips of a required length in the horizontal direction with a required distance from each other so that the object W to be packaged can be passed through, and a lower end upstream side of each vertical plate 2a. Floor boards 2b, 2 extending horizontally from the end toward the other elevation board 2a
b, and a film both edge butting guide 2C.

Each vertical plate 2a, 2a is supported by a horizontal rod 2d to the machine frame 17, and the spacing between the vertical plates 2a, 2a is adjusted by moving the horizontal rod 2d. The upstream end of each band-shaped vertical plate 2a is triangular in shape, with the second-stream end slanting downward at a predetermined angle. The former 2 is a strip film F for bags.
was folded up into a rectangular tube shape so as to occupy a rectangular tube space surrounded by the vertical plates 2a, 2a, floor plates 2b, 2b, and film both edge butt guides 2d, and both edges of the film were aligned with the upper end of the vertical plate 2a. It has a folding function that allows the elevation plates to butt at the center at the height.

On the lower side of the former 2, there are two vertical plates 2a.

2a, there is a vacuum type film conveying belt device 4 provided so that its conveying surface substantially coincides with the lower end of the vertical plate 2a. The vacuum type film feeding belt device 4 has an endless conveyor belt 4a wound around a driving roll 4b and a tensioning roll 4ci, and an air suction belt 4a (7) 4111 conveyor belt (4111) is tightly attached to the lower surface of the conveyor belt 4a. A suction box 4d is provided so that the inside of the suction box 4d is brought into a suction negative pressure state by a negative pressure generating device (not shown) connected to the suction box 4d. The conveyor bell 4a has, for example, small openings at an appropriate pitch or is made of a porous belt so as to have air circulation. Therefore, the vacuum film transport belt device 3 is capable of transporting the film by suctioning and transporting the drawing of the bag strip film F folded into a rectangular tube shape.

Between the vertical plates 1a and 1a of the former 2, there is an anobile plate 5 which substantially coincides with one end of the vertical plate 1a.

The anvil plate 5 is cantilevered by a bracket 7 that hangs down from a suspension frame 6 that can be raised and lowered, and the anvil plate 5 has an end that does not substantially bend even when a required pushing force is applied to the downstream end. It is a strip-shaped horizontal plate with the required width and thickness. The upper surface of the anvil plate 5 is treated with Teflon. The article W to be packaged can pass under the anvil plate 4. The anvil plate 5 receives the seam sealing tape T introduced from the upstream side of the former 2, and the state in which both edges of the bag strip film F are butted together by the seam sealing tape T. fulfill the role of

A holder shaft 9 is provided on a rib plate 8 erected on the upper surface of the hanging frame 6, and a tape roll r is inserted into the holder shaft 9, and the seam sealing tape T is fed out from the tape roll r.
is guided so as to flow tightly onto the anvil plate 4 via a tensioning roll 10 provided from one hanging frame 6.

The seam sealing tape T is made by laminating thermoplastic films such as polyethylene on both sides of a heat-resistant film.

On the anvil plate 5, there is a vertical heater bar 11 on the second flow side.
There is a compaction roll 12 on the downstream side.

The vertical heater /<-11 is tightened with screws to a channel bracket 13 attached to be able to be lowered to the hanging frame 6 above, and is lowered by the extension operation of a linear actuator 14 attached to the hanging frame 6 when the film is fed. The film is positioned so that the gap with the anvil plate 5 is 0.5 to 1 mm, and the tape T for sealing the seam and both edges of the bag strip film F, which is transported while being overlapped on the anvil plate 5, is It is designed to heat up as required.

It should be noted that the linear actuator 14 is operated to reduce the size at the same time as the film transport is stopped, thereby raising the vertical heater bar 11 by 2'.

The compaction roll 12 is attached to the suspension frame 6, and by turning a handle 15, the compaction force applied to the anvil plate 5 can be finely adjusted.The compaction roll 12 is rotated by a motor (not shown), and is overlapped and transferred on the anvil plate 5. Tape T for sealing the film edges and seams of the bag strip film F
is transferred by rolling pressure at the same feed speed as the vacuum type film feed belt device 4. Therefore, the rolling pressure roll 12 performs vertical sealing in which both edges of the bag strip film F which are abutted against each other are connected by the seam sealing tape T overlapped on the inner surfaces thereof. It has become.

A horizontal seal cutter device 16 is located downstream of the vacuum film feed belt device 4. The horizontal seal φ cutter device 16 has a rotary structure,
It is possible to apply two horizontal seals between the objects to be packaged in the packaging tube and then cut between the two horizontal seals.

The horizontal seal cutter device 16 may have an appropriate structure such as a box motion type structure.

Next, the operation of the horizontal bag-forming-filling-sealing machine will be explained, along with examples and explanations of the horizontal bag-forming-filling-packaging method of the present invention.

First, a raw roll R of a strip film for bags is inserted into the roll holder 3, and a Tepro roll R is inserted into the holder shaft 9. Then, the vertical heater bar 11 and compaction roll 12 are separated from the anvil plate 5, the horizontal seal cutter device 16 is left open, and the sealing tape T is fed out from the tape roll r and stretched. It is placed on the anvil plate 5 via the loading roll 10, and then the bag strip film F is fed out from the raw roll R and guided into the inside of the former 2 from below between the carry-in conveyor 1 and the former 2. and guide it to the downstream side of the horizontal seal cutter device 16. Then, due to the folding function of the former 2, the bag strip film F guided inside the former 2 becomes a rectangular tube surrounded by the vertical plates 2a, 2a, the floor plates 2b, 2b, and the film both edge butt guides 2d. The film is raised into a rectangular tube shape to occupy space, and both edges of the film are butted together on the seam sealing tape T on the anvil plate 5.

At this time, if there is a slight gap or a slight overlap between both edges of the film, adjust the passage of the bag strip film F and adjust the length of the vertical plate 2a.

By finely adjusting the spacing between 2a, they can be easily adjusted to fit perfectly.

Next, the vertical heater bar 1 separated from the duck plate 5
1 is energized to preheat it, and the handle 15 is turned to lower the rolling pressure roll 12, and the sealing tape T and the film edges of the bag strip film F are attached to the joints -1- of the anvil plate 5. press

Then, when the operation switch is turned on and the packaging operation is performed, the carry-in conveyor 1 conveys the packaged object W at a predetermined speed and sends it into the former 2, and the vacuum type film feeding belt device 4 The lower surface of the bag strip film F, which is folded up into a rectangular tube shape, is held by suction and transferred at a predetermined speed, and the vertical heater bar 11 is lowered by the extension operation of the linear actuator 14 to join the anvil plate 5. Both edges of the sealing tape T and bag strip film F are heated to a required welding temperature while being lightly pressed so that they flow smoothly, and the rolling pressure roll 12 is heated to the required welding temperature 1- of the anvil plate 5; Both edges of the seam sealing tape T flowing through the bag and the strip film F for bags are rolled and vertically sealed.

In short, the bag strip film F is suction-transferred by the vacuum-type film feed belt device 4, and
It is folded into a rectangular tube shape by the former 2, and one part of the anvil plate 5 is folded by the vertical heater bar 11 and the compaction roll 12.
- A seam sealing tape T guided so as to overlap is welded to both edges of the strip film F for bags and vertically sealed to form a packaging tube H.
Accordingly, the objects W to be packaged are fed into the packaging tube H at a required packaging pitch.

Then, the horizontal seal cutter device 16 performs two horizontal seals between the objects to be packaged in the packaging tube H and cuts between the two horizontal seals.

As a result, the packaged product becomes a three-sided sealed package in which the film edges are vertically sealed with the film edges butted against each other.

Next, a modified embodiment of the horizontal bag making, filling and packaging method of the present invention will be described.

The seam sealing tape is usually made of a heat-resistant film made of the same material as the belt film for bags, and a thermoplastic film is overcoated on both sides of the tape. In this case, open the bag with the seam sealing tape close to it. In order to make the tape tear linearly in the vertical direction along the butt of the edges of the film, either a heat-resistant film that can be torn linearly in the vertical direction is used as the main tape, or it has a tear strength higher than that of a strip film for bags. It is best to use a tape with a small diameter and make a tear cut at the edge of the horizontal seal portion at a position corresponding to the above-mentioned "Join I" sealing tape.

Another method is to use a seam-sealing tape that allows the bag to be opened along the vertical seal, using a tape that is made of a heat-resistant film that is torn in a substantially straight line in the vertical direction, and the width of the inner surface of the tape. Either use one in which a thread with high tensile strength is stretched in the center of the direction and overcoated with a thermoplastic film, and make a necessary indentation in the lateral seal part so that the end of the thread can be grasped. Alternatively, as a seam sealing tape, a thermoplastic film is formed by stretching a film-like strip wire with high tensile strength in the widthwise center of the inner surface of the tape main body, which is made of a heat-resistant film that can be torn in a substantially straight line in the longitudinal direction. It is preferable to use an overcoated one and make a necessary indentation in the horizontal seal portion so that the end of the film-like band wire can be grasped.

[Effects of the Invention] As explained above, according to the horizontal bag making, filling and packaging method of the present invention, ■Both edges of the strip film for bags are abutted and connected with a seam sealing tape that overlaps the inner surface. Since it is sealed vertically, it creates a beautiful packaging similar to envelope packaging. The seam sealing tape is
Since both sides are thermofusible, there will be no sealing failure at the horizontal sill portion where the joint seal crosses, and a good hermetic seal can be achieved.

■Compared to the conventional three-sided seal packaging, the packaging is more beautiful, and the width of the strip film for bags is smaller, reducing the cost of the strip film for bags.

■Since it is possible to print across the entire width of the strip film for bags, if you devise a way to make the printed part of the seam of the vertical sticker continuous, -
As you can see, it is possible to realize a three-sided seal package with only upper and lower horizontal seals.

[Brief explanation of the drawing]

FIG. 1 is a schematic overall front view of a horizontal bag-form-fill-seal machine for implementing the horizontal bag-form-fill-seal method of the present invention, FIG. 2 is a plan view of main parts, and FIG. 3 is a m- ■Cross section, 4th
The figure is a sectional view taken along IV-IV in FIG. 2, and FIG. 5 is a sectional view taken along line V-V in FIG. 111111 + Loading conveyor, 2 fists...Former 4...Φ Vacuum type film feed belt device, 5 fists φ
・Anvil plate, 11... Vertical heater bar 12... Compaction roll, 16... Horizontal seal cutter device, F... Strip film for bags, H... Packaging tube, T... Seam. Sealing tape, W...Item to be packaged, Patent applicant: Kawashima Seisakusho Co., Ltd. Figure 4 Figure 5 d

Claims (6)

[Claims] (1) Continuously guiding a continuous bag strip film whose upper surface side is thermoplastic to the former from the lower upstream side,
The former's film guide function bends the film into a cylindrical shape so that both edges of the film are in the center of the upper part, and vertically seals both edges of the film to form a packaging cylinder.The products carried in at the required pitch by the carrying conveyor are then wrapped in the packaging cylinder. In the horizontal bag making and filling packaging method, in which the packaging tube is introduced one after another into a cylinder to form two horizontal seals between the objects to be packaged in the packaging cylinder, and to cut the space between the two horizontal seals, An anvil plate is provided that is introduced from the side and can support both edges of the bag strip film from the inside, and a seam sealing tape having both sides of thermoplastic is introduced and placed on the anvil plate from the upstream side of the former. At the same time, both edges of the bag strip film are brought into close contact with each other on the seam sealing tape on the anvil plate, and the lower surface of the bag strip film is bent into a cylindrical shape by the former. is received by a conveyor belt, and the film is fed by rotating the conveyor belt while vacuuming from the underside of the conveyor belt, whereby the bag strips are overlapped and transferred on the anvil plate. Both edges of the film and the seam sealing tape are heated as required by a heater bar installed on the anvil plate with a small gap to the anvil plate, and then the heater bar on the anvil plate is heated as required. By rolling the packaging cylinder with a rolling pressure roll installed on the downstream side of the bag, both edges of the bag strip film are butted together with no gaps or overlaps, and overlapped on the inner surface side by the seam sealing tape. A horizontal bag making, filling and packaging method, characterized in that the bags are joined together with the seam sealing tape and vertically sealed. (2) As the seam sealing tape, a tape mainly made of a heat-resistant film that can be torn in a substantially straight line in the longitudinal direction is overcoated with a thermoplastic film on both sides. Horizontal bag making and filling packaging method described in . (3) The horizontal bag form-fill-package method according to claim 2, wherein the tape main body uses a tape having a tear strength lower than that of the bag strip film. (4) A horizontal bag making, filling and packaging method according to any one of claims 1 to 3, characterized in that a tearing cut is made at a position corresponding to the seam sealing tape on the edge of the horizontally sealed portion. . (5) As the seam sealing tape, a thread with high tensile strength is stretched in the widthwise center of the inner surface of the tape main body, which is made of a heat-resistant film that can be torn in a substantially straight line in the longitudinal direction, and the thermoplastic film is overlaid. 2. The horizontal bag making, filling and packaging method according to claim 1, characterized in that a coated yarn is used and a required protrusion is made in the horizontal seal portion so that the end of the yarn can be grasped. (6) As the seam sealing tape, a film-like band wire with high tensile strength is stretched in the widthwise center of the inner surface of the tape main body, which is made of a heat-resistant film that can be torn in a substantially straight line in the longitudinal direction, and is made of thermoplastic material. 2. The horizontal form-fill-fill packaging according to claim 1, wherein an overcoated film is used, and a required protrusion is made in the horizontal seal portion so that the end of the film-like band wire can be grasped. Method.