JP4146019B2 - Mold for packaging equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mold used in a packaging device that seals liquid contents with a cylindrical packaging material. More specifically, the present invention relates to another lateral seal after filling the content from above the lateral seal of the packaging material. When the contents are sealed by applying the packaging material, the packaging material is pressed and held from the outside to form a semi-package into a predetermined shape.
[0002]
[Prior art]
Conventionally, brick-type packaging containers filled with liquid foods such as milk and juice are known, but in recent years, a substantially regular octagonal packaging container different from this brick-type packaging container has been proposed ( JP, 7-187181, A). The present applicant has proposed in Japanese Patent Application No. 9-336026 regarding a packaging device used for manufacturing the packaging container. Below, this packaging apparatus is demonstrated.
[0003]
The packaging device 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 the semi-package 3 as an intermediate is manufactured from the sheet-like packaging material 2, and from the semi-package 3 in FIG. This is divided into a second process in which the final package 4 having a substantially regular octagonal prism shape as a finished product is manufactured. The first process is executed by the packaging machine 1, and the second process is executed by a molding machine (not shown).
[0004]
The packaging machine 1 includes a magazine 5, a large 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]
The magazine 5 is attached with a sheet-like packaging material 2 made of a flexible laminate in a wound state. The packaging material 2 is formed, for example, by laminating a polyethylene resin, an aluminum foil, a paper base material, and a polyethylene resin sequentially from the inside. The wrapping material 1 is preliminarily provided with a fold line for facilitating bending in a subsequent process.
[0006]
The packaging material 2 drawn out from the wound state is guided by the guide roller 6 and guided to the uppermost portion of the packaging machine 1 and then conveyed substantially vertically downward. The packaging material 2 conveyed substantially vertically downward is curved into a cylindrical shape by the cylindrical forming mechanism 7 and is heat-bonded at both ends in the width direction by the vertical sealing mechanism 8 to become a cylindrical shape.
[0007]
Next, the horizontal seal cutting mechanism 10 applies a band-shaped horizontal seal along the width direction to the cylindrical packaging material 2, and juice, tea, etc. are fed into the packaging material 2 from the filling pipe 9 above the horizontal seal. The liquid contents are filled, and a strip-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 cut at substantially central positions. Thereby, as shown in FIG. 6A, the semi-package 3 in which the contents are sealed between the lateral seals S1 and S2 is continuously formed and continuously conveyed to a molding machine (not shown). .
[0008]
As shown in FIG. 4, the horizontal seal cutting mechanism 10 includes two seal / cutting units 11 and 12. Each of the sealing / cutting units 11, 12 includes a pair of sealing jaws 13, 14, and a pair of flaps 15, 16. In each sealing / cutting unit 11, 12, the pair of sealing jaws 13, 14 are connected to each other so as to approach and separate from each other. Further, the pair of sealing jaws 13 and 14 are connected and supported to the frame of the packaging machine 1 via an arm and an operating mechanism (both not shown) so that they can move integrally. Opposing downward projecting portions 17 and 18 project from the lower portions of the respective sealing jaws 13 and 14. A welding mechanism and a cutting mechanism (both not shown) are disposed in the lower convex portions 17 and 18.
[0009]
The lower convex portions 17 and 18 of the pair of sealing jaws 13 and 14 include pressing surfaces 17a and 18a, upper inclined surfaces 17b and 18b, and lower inclined surfaces 17c and 18c, which face each other. The packaging material 2 is inserted between the pressing surfaces 17a and 18a, and the sealing jaws 13 and 14 are 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 is activated, the thermoplastic resins on the inner surface of the packaging material 2 are thermally welded to each other, and a belt-like horizontal seal along the width direction is applied. When the cutting mechanism is activated, the central portion of the horizontal seal Is disconnected.
[0010]
Each of the sealing / cutting units 11 and 12 moves along the moving direction (vertical direction) of the packaging material 2 from the upper first position to the second position below a predetermined distance, and then the movement path of the packaging material 2. It is provided so that it may leave | separate and return to a 1st position. When one sealing / cutting unit 11 is in the first position, the sealing / cutting units 11 and 12 move with a half cycle shift so that the other sealing / cutting unit 12 is in the second position. Such movement of the sealing / cutting units 11 and 12 is driven and controlled by an arm connected to the sealing jaws 13 and 14 and an operating mechanism (both not shown).
[0011]
Each of the flaps 15 and 16 includes two side plates 19 and 19 facing each other, a bottom plate 20 between the two side plates 19 and 19, and intermediate plates 21 and 21 connecting the side plates 19 and 19 to the bottom plate 20. I have. A short shaft 22 protrudes from the outer surface of the lower end of one side plate 19 of the flaps 15 and 16, and the short shaft 22 is rotatably supported by the sealing jaws 13 and 14. Link members (see FIG. 5) 23 are connected to the upper outer surfaces of the side plates 19 and 19 of both the flaps 15 and 16. The flaps 15 and 16 are rotationally driven through the link member 23, and are between a closed position where the opposing side plates 19 and 19 are substantially parallel to each other and their upper ends are in contact with each other and an open position where the upper side is open. The cross-sections of the inner surfaces of the closed flaps 15 and 16 that are opened and closed at the end are flat octagonal shapes.
[0012]
Then, the inner surfaces 15a, 16a of the closed flaps 15, 16 of the sealing / cutting units 11, 12 in the lower second position, the upper inclined surfaces 17b, 18b of the lower convex portions 17, 18, and the upper first The inner surface of the mold is formed by the lower inclined surfaces 17c and 18c of the lower convex portion 17 of the sealing / cutting unit 11 at the position.
[0013]
That is, the inner surfaces 15a and 16a of the closed flaps 15 and 16 form the inner peripheral surface portion of the mold, and the side plates 19 and 19 of the flaps 15 and 16, the inner plates 21 and 21, and the inner surfaces 19a and 19a of the bottom plate 20, respectively. 21a, 21a, 20a constitutes a side pressing surface.
[0014]
To manufacture a semi-package, when one sealing / cutting unit 11 is in the first upper position, the flaps 15 and 16 are opened, the sealing jaws 13 and 14 are close to each other, and the lower protrusions 17 and 18 are A lateral seal S1 of the packaging material 2 is applied between the pressing surfaces 17a, 18a, and the liquid content is filled into the packaging material 2 from the filling pipe 9 above the lower lateral seal S2. After the completion of filling, one sealing / cutting unit 11 descends to the second position while holding the packaging material 1 with the horizontal seal S1. In synchronization with this, the other sealing / cutting unit 12 in the second position below returns to the first position.
[0015]
In one sealing / cutting unit 11 that has reached the second position below, the flaps 15 and 16 are closed and the lateral seal S2 is cut. At this time, in the sealing / cutting unit 12 moved to the upper first position, the sealing jaws 13 and 14 are close to each other, and the lateral seal S2 is applied to the packaging material 2 between the pressing surfaces 17a and 18a of the lower protrusions 17 and 18. Is given. As a result, the contents are sealed between the first and second lateral seals S1 and S2, the semi-package 3 is formed, and the sealing jaws 13 and 14 and the flaps 15 and 16 are held in a desired shape.
[0016]
In the packaging apparatus, the bottom plate 20 of the flaps 15 and 16 is formed in a curved surface shape such that the middle part in the vertical direction (longitudinal direction) protrudes inward, and accordingly, the intermediate plate 21, The inner surface 21a of 21 and the part by the side of the baseplate 20 of 21a are also curved. Thereby, a strong crease can be made between the side surfaces of the semi-package 3, and the moldability from the semi-package to the final package 4 becomes easy.
[0017]
[Problems to be solved by the invention]
However, when the packaging apparatus 2 is filled with the liquid contents, the semi-package 3 is expanded as shown in FIGS. 7A and 7B, and the upper side is thinned. It will be in the state of so-called bottom swelling.
[0018]
That is, when the packaging material 2 is filled with the contents, as shown in FIG. 7A, the thickness dimension L2 on the lower side becomes longer than the thickness dimension L1 on the upper side of the semi-package 3, and As shown in FIG. 7B, the width dimension L3 on the upper side is longer than the width dimension L4 on the lower side. Therefore, as shown in FIG. 6A, 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. ing.
[0019]
Accordingly, the present invention provides a packaging apparatus that can form a semi-package of a predetermined shape by making the width dimension and the thickness dimension between the upper and lower horizontal seals substantially uniform between the upper and lower horizontal seals. The purpose is to provide a mold.
[0020]
[Means for Solving the Problems]
In order to achieve the above object, the invention of claim 1 provides a cylindrical packaging material with a lower lateral seal, and fills the packaging material from above the lower lateral seal with a liquid content. The upper side seal is applied at an upper position that is a predetermined distance away from the side side seal to form a semi-package in which the contents are sealed, and the semi-package is bent to form a final package with a polygonal prism of five or more corners A plurality of side pressing surfaces that press each side surface of the semi-package, and includes an inner peripheral surface portion having a flat cross section as a whole, and is being formed when an upper horizontal seal is applied A mold for holding the semi-package in a desired shape, and among the plurality of side pressing surfaces, on the upper end surfaces of the side pressing surfaces respectively opposed to both sides in the longitudinal direction of the upper side seal, On the top of the semi-package Thickness semi package the lower side to press the support of the seal is characterized in that a projection of correcting a substantially uniform flat shape.
[0021]
In the mold of this packaging device, when the liquid content is filled from above the lower side seal, and the upper side seal is applied and held in a desired shape by the side pressing surface, the longitudinal direction of the upper side seal The protrusions are in contact with the lower sides of the two sides. When the protrusion comes into contact with the lower side on both sides in the longitudinal direction of the upper horizontal seal, the lower side of the upper horizontal seal swells in the thickness direction, so that the thickness dimension becomes substantially uniform between the upper and lower horizontal seals.
[0022]
In this case, when the packaging material is filled with a liquid content, the lower side seal side swells, so-called a bottom bulge state, and the thickness of the lower side seal side increases, so that the upper side seal side becomes longer. Although the width dimension becomes shorter, the width dimension between the upper and lower horizontal seals can be made substantially uniform by pressing and supporting the lower side of the upper horizontal seal with the protrusion. Accordingly, 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 becomes a predetermined shape.
[0023]
Invention of Claim 2 is a shaping | molding die of the packaging apparatus of Claim 1, Comprising: The said shaping | molding die has a pair of flap provided so that it could adjoin and space apart, and this flap was provided. A bottom plate, a side plate disposed on both sides of the bottom plate, and having a top plate extending above the bottom plate, and a middle plate that connects between 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 protrusion is provided on the upper end portion of the side plate.
[0024]
In this mold of the packaging apparatus, when the packaging material is filled with liquid contents and held in a predetermined shape on the inner peripheral surface formed by the bottom plate, side plate, and middle plate of a pair of flaps, The provided protrusions are in contact with the lower side on both sides in the longitudinal direction of the upper horizontal seal. When the protrusion comes into contact with the lower side on both sides in the longitudinal direction of the upper horizontal seal, the lower side of the upper horizontal seal swells in the thickness direction, so that the thickness dimension becomes substantially uniform between the upper and lower horizontal seals.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a mold for a packaging device according to the present invention will be described. The molding die of the packaging device of this embodiment is different from the packaging machine 1 shown in FIGS. 3 to 5 in the shape of the flap of the seal / cutting unit, and the other configurations are the same.
[0026]
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 and a bottom plate between the two side plates 29 and 29. 30 and intermediate plates 31, 31 that connect the side plates 29, 29 and the bottom plate 30. A short shaft 22 protrudes from the outer surface of the lower end of one side plate 29 of the flaps 25 and 26, and the short shaft 22 is rotatably supported by the sealing jaws 13 and 14. A link member 23 is connected to the upper outer surfaces of the side plates 29 and 29 of both the flaps 25 and 26. The flaps 25, 26 are rotationally driven via the link member 23, and are between a closed position where the opposing side plates 29, 29 are substantially parallel to each other and their upper ends are in contact with each other and an open position where the upper side is open. The cross sections of the inner surfaces of the closed flaps 25 and 26 that open and close at the end are flat octagonal shapes.
[0027]
Further, the inner surfaces 25a, 26a of the flaps 25, 26 and the upper inclined surfaces 17b, 18b of the lower convex portions 17, 18 and the lower inclined portions of the lower convex portions 17, 18 of the sealing / cutting unit 11 at the first upper position. The surfaces 17c and 18c constitute the inner surface of the mold. That is, the inner surfaces 25a and 26b of the closed flaps 25 and 26 form an inner peripheral surface portion of the mold, and the inner surfaces 29a and 29a of the side plates 29 and 29, the intermediate plates 31 and 31 of the flaps 25 and 26, and the bottom plate 30, 31a, 31a, 30a constitutes a side pressing surface.
[0028]
Further, of the plurality of side pressing surfaces (29a, 29a, 31a, 31a, 30a), the upper end of the side pressing surface facing the both sides in the longitudinal direction of the upper horizontal seal S1 is arranged on the upper side of the semi-package 3. Protrusions 27 and 27 are provided to press and support the lower sides 32 and 32 of the horizontal seal S1 to correct the semipackage 3 into a predetermined shape. That is, the upper ends 28 and 28 of the side plates 29 and 29 of the flaps 25 and 26 are extended above the bottom plate 30, and projections 27 and 27 are provided on the upper ends 28 and 28, respectively.
[0029]
Since the protrusions 27 and 27 are provided on the upper end portions 28 and 28 extending above the side plate 29, the trunk portion 3 a of the semi-package 3 has the bottom plate 30, the middle plate 31, and the inner surfaces 29 a and 30 a of the side plate 29. , 31a and is held flat, and the protrusions 27 and 27 are in contact with the lower sides 32 and 32 of the lateral seal S2 on the lower side of the lateral seal S1 of the semi-package 3. For this reason, the protrusion height is set so that the width L3 (see FIG. 7) on the lower side of the horizontal seal S1 is substantially equal to the width L4 on the lower horizontal seal S2.
[0030]
Further, the protrusions 27 and 27 press and support the lower sides 32 and 32 of the upper horizontal seal S1 and both sides in the longitudinal direction of the horizontal seal S1, so that the lower side of the upper horizontal seal S1 extends in the thickness direction. By swelling, it becomes substantially equal to the thickness dimension L2 on the side of the lower horizontal seal S2.
[0031]
According to the packaging device of the present embodiment, when the liquid content is filled from above the lower horizontal seal S2, and the upper horizontal seal S1 is applied and held in the desired shape by the flaps 25 and 26, the upper horizontal seal The protrusions 27 are in contact with the lower sides 32 of the seal S1 in the longitudinal direction. When the protrusions 27 and 27 come into contact with the lower sides 32 and 32 on both sides in the longitudinal direction of the upper side seal S1, the lower sides 32 and 32 of the upper side seal S1 are compressed (in the directions of arrows a1 and a2 in the drawing). The lower side of the upper horizontal seal S1 swells in the thickness direction (in the direction of the arrows b1 and b2 in the figure), so that the thickness dimension is substantially uniform between the upper and lower horizontal seals.
[0032]
In this case, when the packaging material 2 is filled with liquid content, the lower side seal S2 side swells, so-called a bottom bulge state, and the thickness dimension on the lower side seal S2 side becomes longer. Although the width dimension is shorter than the width of the horizontal seal S1, the protrusions 27 and 27 support the lower side 32 and 32 of the upper horizontal seal S1 so that the width dimension between the upper and lower horizontal seals S1 and S2 is substantially reduced. It can be made 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 be formed into a predetermined flat shape.
[0033]
In the above embodiment, the bottom plate 30, the side plates 29 and 29, and the middle plate 31 have been described with respect to the flat flaps 25 and 26. However, as shown in FIG. 4, the bottom plate 20, the side plate 19 and the middle plate 21 are arcuate. The present invention can also be applied to the formed flaps 15 and 16.
[0034]
【The invention's effect】
As described above, according to the first aspect of the present invention, when the protrusion comes into contact with the lower side on both sides in the longitudinal direction of the upper side seal, the lower side of the upper side seal swells in the thickness direction. The thickness dimension is almost uniform between the horizontal seals.
[0035]
According to the second aspect of the present invention, when the protrusions are in contact with the lower side on both sides in the longitudinal direction of the upper side seal, the lower side of the upper side seal swells in the thickness direction. The vertical dimension is almost 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 apparatus according to the present invention.
FIG. 2 is a cross-sectional view showing a flap used in a molding die of a packaging device according to the present invention.
FIG. 3 is a perspective view showing the entire packaging machine.
4 is a cross-sectional view showing a sealing / cutting unit of the packaging machine of FIG. 3;
5 is a perspective view showing an assembled state of the flap of FIG. 4; FIG.
6A is a perspective view showing a semi-package, FIG. 6B is a perspective view showing the process of molding the semi-package into a final package, and FIG. 6C is a perspective view showing the final package. .
7A is a side view of the semi-package, and FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Packaging machine 2 Packaging material 3 Semi-package 4 Final package 25, 26 Flap 25a 26a Inner surface 27 Protrusion 28 Upper end 29 Side plate 30 Bottom plate 31 Middle plate 29a, 30a, 31a Inner surface

Claims (2)

Apply a lower lateral seal to the cylindrical packaging material, fill the packaging material with liquid content from above the lower lateral seal, and place it at an upper position separated by a predetermined distance from the lower lateral seal. It is used for a packaging device that forms a semi-package in which the contents are sealed by applying an upper side seal, and bends the semi-package to form a final package of a polygonal column of five or more pentagons. A molding die comprising a plurality of side pressing surfaces to be pressed, provided with an inner surface having a flat cross section as a whole, and holding a semi-package being formed in a desired shape when an upper horizontal seal is applied, Of the plurality of side pressing surfaces, the lower side of the upper side seal of the semi-package is pressed and supported on the upper end surfaces of the side pressing surfaces facing both sides in the longitudinal direction of the upper side seal. the package Mold packaging apparatus characterized in that a projection viewed dimensions to correct a substantially uniform flat shape.   The mold of the packaging apparatus according to claim 1, wherein the mold has a pair of flaps that are movably provided so as to be close to and away from each other, and the flaps are provided on a bottom plate and on both sides of the bottom plate. The bottom plate, the side plate, and the inner surface of the middle plate, each of which is arranged and includes a side plate having 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 mold for a packaging apparatus, wherein the inner surface is formed on a side, and the protrusion is provided on an upper end portion of the side plate.

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