JP2000203512A - Forming tool for packaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a package whose width and thickness between upper and lower lateral seals are almost uniform by providing a projection, for correcting a semi-package into a specific shape by the pressing and supporting of parts under the upper lateral seal, on the upper-end face of each of opposite sidewise pressing faces. SOLUTION: A projection 27 for correcting a semi-package 3 into a specific shape is provided at the upper end 28 of each of the opposite flat side-plates 29 of flaps 25 and 26 used for pressing the sides of the semi-package 3. When liquid contents are filled from above a lower lateral seal S2, an upper lateral seal S2 is formed, and the package is held in a desired shape by the flaps 25 and 26 from both sides, the projections 27 come into contact with parts 32 on both sides under the upper lateral seal S1 and compress the parts 32 in a1 and a2 directions, so that the parts under the lateral seal S1 are caused to bulge in b1 and b2 directions. Thus, the tendency of the semi-package 3 to bulge in its lower part is hindered, and it can be formed in a specific flat shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding die used for a packaging device for sealing a liquid content with a cylindrical packaging material, and more particularly, to filling the content from above a horizontal seal of the packaging material. The present invention relates to a molding die for forming a semi-package into a predetermined shape by pressing and holding the packaging material from the outside when sealing the contents by further applying another horizontal seal after the sealing.

[0002]

2. Description of the Related Art Brick-type packaging containers filled with liquid foods such as milk and juice have been known.
In recent years, a packaging container having a substantially regular octagonal column shape different from the brick type packaging container has been proposed (Japanese Patent Laid-Open No. 7-18718).
No. 1). The present applicant has proposed a packaging device used for manufacturing the packaging container in Japanese Patent Application No. 9-336026. Hereinafter, this packaging apparatus will be described.

[0003] The packaging apparatus includes a packaging machine 1 shown in FIG. 3 and a molding machine (not shown). As shown in FIG. 6A, the manufacturing process of the packaging container includes a first process in which a semi-package 3 as an intermediate is manufactured from the sheet-like packaging material 2, and FIG.
(B) A second process in which a substantially regular octagonal final package 4 as a finished product is manufactured from the semi-package 3. The first step is executed by the packaging machine 1, and the second step is executed by a molding machine (not shown).

The packaging machine 1 includes a magazine 5, a number of guide rollers 6, a cylindrical forming mechanism 7, a vertical seal mechanism 8, a filling pipe 9, and a horizontal seal cutting mechanism 10.

[0005] A sheet-like packaging material 2 made of a flexible laminate is attached to the magazine 5 in a wound state. The packaging material 2 is formed by, for example, laminating a polyethylene resin, an aluminum foil, a paper base material, and a polyethylene resin in this order from the inside. The packaging material 1 is provided with a folding line in advance to facilitate bending in a later step.

[0006] The packaging material 2 pulled out from the wound state is guided by guide rollers 6 and guided to the uppermost part of the packaging machine 1 and then conveyed substantially vertically downward. The packaging material 2 conveyed substantially vertically downward is cylindrically curved by the cylindrical forming mechanism 7, and both ends in the width direction are thermally welded to each other by the vertical sealing mechanism 8 to be cylindrical.

Next, a band-shaped horizontal seal is applied to the cylindrical packaging material 2 along the width direction by the horizontal seal cutting mechanism 10, and juice or the like is introduced into the packaging material 2 from the filling pipe 9 above the horizontal seal. A liquid content such as tea is filled, a band-shaped horizontal seal is further provided at a position above the horizontal seal by a predetermined distance, and the upper and lower horizontal seals are respectively cut at substantially center positions. As a result, as shown in FIG. 6A, the semi-package 3 in which the contents are sealed between the two horizontal seals S1 and S2.
Are continuously formed and continuously conveyed to a molding machine (not shown).

As shown in FIG. 4, the horizontal seal cutting mechanism 10 has two sealing / cutting units 11 and 12. Each of the sealing / cutting units 11 and 12 includes a pair of sealing jaws 13 and 14 and a pair of flaps 15 and 16, respectively. Each sealing / cutting unit 11,
In 12, a pair of sealing jaws 13 and 14 are connected to each other so as to approach and separate from each other. The pair of sealing jaws 13 and 14 are connected to and supported by the frame of the packaging machine 1 via an arm and an operating mechanism (both are not shown) so as to be able to move integrally with each other. The lower portions of the sealing jaws 13, 14 are provided with opposing lower convex portions 17, 1.
8 are protruded. In the lower convex portions 17 and 18,
A welding mechanism and a cutting mechanism (both not shown) are provided.

The lower convex portion 1 of the pair of sealing jaws 13 and 14
7 and 18 have opposing pressing surfaces 17a and 18a, upper inclined surfaces 17b and 18b, and lower inclined surfaces 17c and 18c, respectively. The packaging material 2 is inserted between the pressing surfaces 17a and 18a, and the sealing jaws 13 and 14 come close to each other, whereby the packaging material 2 is sandwiched and pressed between the pressing surfaces 17a and 18a. In this state, when the welding mechanism operates, the thermoplastic resins on the inner surface of the packaging material 2 are heat-welded to each other to form a strip-shaped horizontal seal along the width direction. Is disconnected.

Each of the sealing / cutting units 11 and 12 is moved along the moving direction (vertical direction) of the packaging material 2 from a first position at an upper position to a second position at a predetermined distance below the first position. Is provided so as to return to the first position away from the movement path of the vehicle. When one sealing / cutting unit 11 is in the first position, the other sealing / cutting unit 12 is in the second position.
And the sealing / cutting units 11 and 12
Moves half a cycle apart. Such movement of each sealing / cutting unit 11, 12 is performed by sealing jaws 13, 14.
Are driven and controlled by an arm and an operating mechanism (both not shown) connected to the arm.

Each of the flaps 15 and 16 is composed of two opposing side plates 19 and 19 and a bottom plate 2 between the two side plates 19 and 19.
0, the middle plate 2 connecting the side plates 19, 19 and the bottom plate 20
1 and 21 are provided. A short axis 22 protrudes from an outer surface of a lower end portion of one of the side plates 19 of the flaps 15 and 16, and the short axis 2
2 is rotatably supported by the sealing jaws 13 and 14. A link member (see FIG. 5) 23 is connected to upper outer surfaces of both side plates 19, 19 of the flaps 15, 16. The flaps 15 and 16 are rotationally driven via a link member 23, and are located between a closed position where the opposing side plates 19 are substantially parallel to each other and their upper ends abut against each other, and an open position where the upper side is open. Closed flap 15, which opens and closes with
The cross section of the inner surface of 16 is a flat octagon.

[0012] Then, the seal at the lower second position.
The closed flaps 15, 1 of the cutting units 11, 12
6, the upper inclined surface 17b, 18b of the lower convex portion 17, 18 and the lower inclined surface 17c of the lower convex portion 17 of the sealing / cutting unit 11 at the upper first position.
The inner surface of the mold is constituted by 18c.

That is, the closed flaps 15, 16
Inner surfaces 15a, 16a form the inner peripheral surface of the mold, and the inner surfaces 19a, 19a, 21a, 21a of the side plates 19, 19, the middle plates 21, 21 and the bottom plate 20 of the flaps 15, 16 are formed.
20a constitutes a side pressing surface.

To manufacture a semi-package, the flaps 15, 16 open and the sealing jaws 13, 14 when one of the sealing and cutting units 11 is in the upper first position.
Are close to each other, and the pressing surfaces 17a, 1
The horizontal seal S1 of the packaging material 2 is applied between the portions 8a, and the inside of the packaging material 2 is filled with the liquid content from the filling pipe 9 above the lower horizontal seal S2. After the filling is completed, one sealing / cutting unit 11 is lowered to the second position while holding the packaging material 1 with the horizontal seal S1. Synchronously, the other sealing and cutting unit 12 in the lower second position returns to the first position.

One of the seals reaching the lower second position
In the cutting unit 11, the flaps 15 and 16 are closed, and the horizontal seal S2 is cut. At this time, in the sealing / cutting unit 12 moved to the first position above, the sealing jaws 13 and 14 are close to each other, and the lower convex portions 17 and 18
The horizontal seal S2 is applied to the packaging material 2 between the pressing surfaces 17a and 18a. Thereby, the contents are sealed between the first and second horizontal seals S1, S2, the semi-package 3 is formed, and the sealing jaws 13, 14, and the flaps 15, 16 are held in a desired shape.

In the packaging device, the flaps 15 and
The bottom plate 20 of 16 is formed in a curved surface shape such that an intermediate portion in the vertical direction (longitudinal direction) protrudes inward, and accordingly, the bottom plates 2 of the inner surfaces 21a of the middle plates 21 and 21 are formed.
The portion on the 0 side is also curved. Thereby, a strong fold can be formed between the side surfaces of the semi-package 3, and the moldability from the semi-package to the final package 4 becomes easy.

[0017]

However, when the packaging material 2 is filled with the liquid content by the above-mentioned packaging device, the semi-package 3 is moved downward as shown in FIGS. 7 (a) and 7 (b). The side swells and the upper side becomes thinner, which is a so-called lower swelling state.

That is, when filling the contents into the packaging material 2, the thickness L2 on the lower side becomes longer than the thickness L1 on the upper side of the semi-package 3 as shown in FIG. Also, as shown in FIG. 7B, the width L on the upper side
3 is longer than the lower width L4. Therefore, FIG.
As shown in (a), there is a problem that the semi-package 3 having a predetermined shape in which the width dimension and the thickness dimension between the upper and lower horizontal seals S1 and S2 are substantially uniform cannot be obtained.

Therefore, according to the present invention, the width dimension and the thickness dimension between the upper and lower horizontal seals can be made substantially uniform between the upper and lower horizontal seals, and a semi-package having a predetermined shape can be formed. The purpose of the present invention is to provide a mold for a packaging device.

[0020]

In order to achieve the above object, according to the first aspect of the present invention, a tubular packing material is provided with a lower horizontal seal, and the inside of the packaging material is inserted from above the lower horizontal seal. Fill the liquid content, apply the upper horizontal seal at a predetermined distance above the lower horizontal seal, form a semi-package in which the content is sealed, bend the semi-package and pentagon Used in a packaging device for forming the above-mentioned polygonal pillar final package, comprising an inner peripheral surface having a plurality of side pressing surfaces for pressing each side surface of the semi-package and having a flat cross section as a whole, A molding die for holding a semi-package being formed in a desired shape when applying a horizontal seal, wherein a side of each of the plurality of side pressing surfaces opposed to both longitudinal sides of the upper horizontal seal. On the upper end surface of the It is characterized in that a projection of correcting semi packages into a predetermined shape by pressing supporting the lower side of the transverse seal above the semi-packaged.

In the molding die of this packaging apparatus, when the liquid content is filled from above the lower horizontal seal, the upper horizontal seal is applied, and the desired shape is held by the side pressing surface. The projections respectively contact the lower sides on both sides in the longitudinal direction. When the projections abut on the lower sides on both sides in the longitudinal direction of the upper horizontal seal, the lower side of the upper horizontal seal expands in the thickness direction, so that the thickness dimension between the upper and lower horizontal seals becomes substantially uniform.

In this case, when the liquid content is filled into the packaging material, the lower horizontal seal side expands, that is, a so-called lower swelling state occurs, and the thickness dimension of the lower horizontal seal side becomes longer, so that the upper horizontal seal side becomes longer. Although the width dimension is shorter than that of the horizontal seal side, the lower side of the upper horizontal seal is pressed and supported by the projection, so that the width dimension between the upper and lower horizontal seals can be made substantially uniform. Therefore, the width dimension and the thickness dimension between the lower horizontal seals can be made substantially uniform between the upper and lower horizontal seals, and the semi-package has a predetermined shape.

According to a second aspect of the present invention, there is provided a molding die of the packaging device according to the first aspect, wherein the molding die has a pair of flaps provided so as to be movable toward and away from each other, The flap is a bottom plate, each side plate is disposed on both sides of the bottom plate, a side plate having an upper end extending above the bottom plate, and a middle plate connecting between the both sides of the bottom plate and the side plate. The inner peripheral surface portion is formed on the inner surface side of the bottom plate, the side plate, and the middle plate, and the projection is provided at an upper end portion of the side plate.

In the molding die of this packaging apparatus, the packaging material is filled with a liquid content and held in a predetermined shape by the inner peripheral surface formed by the bottom plate, the side plate, and the middle plate of the pair of flaps. The protrusion provided on the upper end portion is in contact with the lower portion on both sides in the longitudinal direction of the upper horizontal seal. When the projections abut on the lower sides on both sides in the longitudinal direction of the upper horizontal seal, the lower side of the upper horizontal seal expands in the thickness direction, so that the thickness dimension between the upper and lower horizontal seals becomes substantially uniform.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a molding die of a packaging device according to the present invention will be described. The molding die of the packaging device of the present embodiment is different from the packaging machine 1 shown in FIGS.
The flap shape of the sealing / cutting unit is different, and the other configuration is the same.

As shown in FIGS. 1 to 3, the flaps 25 and 26 used in the packaging machine of the present embodiment include two flat plate-like side plates 29 and 29 facing each other and two side plates 29 and 29.
A bottom plate 30 is provided between the side plates 29, 29 and the bottom plate 30. Flaps 25, 26
A short shaft 22 protrudes from an outer surface of a lower end portion of one of the side plates 29, and the short shaft 22 is rotatably supported by the sealing jaws 13 and 14. Both side plates 29, 2 of the flaps 25, 26
The link member 23 is connected to an upper outer surface of the upper part 9. The flaps 25, 26 are driven to rotate via the link member 23, and between a closed position where the opposing side plates 29, 29 are substantially parallel to each other and their upper ends contact each other, and an open position where the upper side is open. The cross-section of the inner surfaces of the closed flaps 25 and 26 that open and close with a flat octagonal shape.

The inner surfaces 25a of the flaps 25, 26,
26a and upper inclined surfaces 17b, 18 of the lower convex portions 17, 18
b and the sealing and cutting unit 1 in the first position above
The inner surfaces of the mold are constituted by the lower inclined surfaces 17c, 18c of the lower convex portions 17, 18. That is, the inner surfaces 25a, 26b of the closed flaps 25, 26 form the inner peripheral surface of the mold, and the side plates 29, 2 of the flaps 25, 26 are formed.
9, each inner surface 29a, 29 of the middle plate 31, 31 and the bottom plate 30
a, 31a, 31a and 30a constitute side pressing surfaces.

Further, a plurality of side pressing surfaces (29a, 29
a, 31a, 31a, 30a), the lower sides 32, 32 of the upper horizontal seal S1 of the semi-package 3 are pressed against the upper ends of the side pressing surfaces respectively opposed to both sides in the longitudinal direction of the upper horizontal seal S1. Projections 27, 27 for supporting and correcting the semi-package 3 into a predetermined shape are provided. That is, the upper ends 28, 28 of the side plates 29, 29 of the flaps 25, 26 extend above the bottom plate 30, and the upper ends 28, 28 are provided with protrusions 27, 27, respectively.

Since the protrusions 27 are provided on the upper end portions 28 extending above the side plate 29, the body 3a of the semi-package 3 includes the bottom plate 30, the middle plate 31, and the side plate 2
9 are held flat by the inner surfaces 29a, 30a, 31a of the semi-package 3, and are located on the lower side of the horizontal seal S1 of the semi-package 3 and both sides 32, 32 in the longitudinal direction of the horizontal seal S2.
, The projections 27, 27 contact. Therefore, the horizontal seal S1
Is set so that the width L3 (see FIG. 7) on the lower side of the lower side is substantially equal to the width L4 on the side of the lower side seal S2.

The lower portions 32, 32 of the upper horizontal seal S1 are pressed and supported by the protrusions 27, 27 on both sides in the longitudinal direction of the horizontal seal S1, so that the lower side of the upper horizontal seal S1 is thick. By expanding in the vertical direction, the thickness becomes substantially equal to the thickness L2 of the lower horizontal seal S2.

According to the packaging device of the present embodiment, the liquid contents are filled from above the lower horizontal seal S2, the upper horizontal seal S1 is applied, and the desired shape is held by the flaps 25 and 26. The projections 27 abut against the lower sides 32 on both sides in the longitudinal direction of the upper horizontal seal S1, respectively. Lower side 3 on both sides in the longitudinal direction of upper side seal S1
When the protrusions 27 abut against the second and second 32, the lower side 32 of the upper horizontal seal S1 is compressed (arrows a1, a2 in the figure).
Direction), so that the lower side of the upper horizontal seal S1 expands in the thickness direction (the direction of the arrow b1, b2 in the drawing),
The thickness dimension is substantially uniform between the upper and lower horizontal seals.

In this case, when the liquid content is filled into the packaging material 2, the lower side seal S2 side expands, that is, a so-called lower swelling state, and the thickness dimension of the lower side seal S2 side becomes longer. Although the width dimension is shorter than that of the upper horizontal seal S1, the lower sides 32, 32 of the upper horizontal seal S1 are pressed and supported by the projections 27, 27,
The width between the upper and lower horizontal seals S1 and S2 can be made substantially uniform. Therefore, the width dimension and the thickness dimension between the upper and lower horizontal seals can be made substantially uniform between the upper and lower horizontal seals S1 and S2, and the semi-package 3 can have a predetermined flat shape.

In the above embodiment, the bottom plate 30, the side plates 29, 29, and the middle plate 31 have been described as the flat flaps 25, 26. However, as shown in FIG. 4, the bottom plate 20, the side plate 19, the middle plate 21 Flap 15 is formed in an arc shape,
The present invention can also be applied to the sixteenth embodiment.

[0034]

As described above, according to the first aspect of the present invention, when the projections come into contact with the lower portions on both sides in the longitudinal direction of the upper horizontal seal, the lower portion of the upper horizontal seal expands in the thickness direction. This makes the thickness dimension substantially uniform between the upper and lower horizontal seals.

According to the second aspect of the present invention, when the projections come into contact with the lower sides on both sides in the longitudinal direction of the upper horizontal seal, the lower side of the upper horizontal seal expands in the thickness direction, so that the space between the upper and lower horizontal seals is reduced. Thus, the thickness dimension becomes substantially uniform.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a pair of flaps used in a molding die of a packaging device according to the present invention.

FIG. 2 is a cross-sectional view showing a flap used in a molding die of the packaging device according to the present invention.

FIG. 3 is a perspective view showing the entire packaging machine.

FIG. 4 is a sectional view showing a sealing / cutting unit of the packaging machine of FIG. 3;

FIG. 5 is a perspective view showing an assembled state of the flap of FIG. 4;

6A and 6B show a packaging container, wherein FIG. 6A is a perspective view showing a semi-package, FIG. 6B is a perspective view showing a process of forming the semi-package into a final package, and FIG. 6C is a perspective view showing the final package. .

7A and 7B show a downward swelling state of the semi-package, wherein FIG. 7A is a side view and FIG. 7B is a plan view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wrapping machine 2 Wrapping material 3 Semi-package 4 Final package 25, 26 Flap 25a 26a Inner surface 27 Projection 28 Upper end 29 Side plate 30 Bottom plate 31 Middle plate 29a, 30a, 31a Inner surface

Claims (2)

[Claims] 1. A tubular packaging material is provided with a lower horizontal seal, and the interior of the packaging material is filled with a liquid content from above the lower horizontal seal by a predetermined distance from the lower horizontal seal. An upper horizontal seal is applied to a distant upper position to form a semi-package in which the contents are sealed, and the semi-package is bent to form a pentagonal or larger polygonal pillar final package, and is used in a packaging apparatus, Molding that consists of a plurality of lateral pressing surfaces that press each side of the package, has an inner surface with a flat cross section as a whole, and holds the semi-package being formed in the desired shape when applying the upper horizontal seal And a lower side of the upper horizontal seal of the semi-package, on an upper end surface of a side pressing surface facing each of both sides in a longitudinal direction of the upper horizontal seal among the plurality of side pressing surfaces. Press and support semi A molding die for a packaging device, comprising a projection for correcting a package into a predetermined shape. 2. The molding die of the packaging device according to claim 1, wherein the molding die has a pair of flaps movably provided so as to approach and separate from each other, wherein the flaps include a bottom plate, Each of the bottom plate and the side plate includes a side plate that is disposed on both sides of the bottom plate and has an upper end extending above the bottom plate, and a middle plate that connects between both sides of the bottom plate and the side plate. A molding die for a packaging device, wherein the inner surface is formed on an inner surface side of a middle plate, and the projection is provided on an upper end portion of the side plate.