JP6779533B2 - Flexible container manufacturing equipment and manufacturing method - Google Patents

Description

The present invention relates to an apparatus and method for producing a soft container, for example, an apparatus and method for producing a soft container suitable for containing a fluid filling material such as an adhesive or a paint.

In general, this type of soft container has a flexible body and an advanced resin member made of an injection molded product of a hard resin (see Patent Documents 1 to 3 and the like). The body of Patent Document 1 has a tubular shape in which a resin sheet is rolled. A circular lid-shaped tip resin member is provided at the tip of the body. A discharge port is formed in the center of the tip resin member. Moreover, a barrier sheet including an aluminum layer is attached to the inner surface of the advanced resin member. The barrier sheet has a flat shape along the inner surface of the tip resin member. The discharge port is blocked by the central part of the barrier sheet.

The tip resin member in the soft container of Patent Documents 2 and 3 integrally has a tapered shoulder portion and a tubular mouth and neck portion. A barrier sheet containing an aluminum layer is attached to the inner surface of the tip resin member. The barrier sheet has a tapered portion along the inner surface of the shoulder portion and a central flat portion. The central flat part is stretched into the mouth and neck to close the mouth and neck.

Japanese Patent No. 5713649 Japanese Unexamined Patent Publication No. 2013-233982 Japanese Unexamined Patent Publication No. 2011-195144

The barrier sheets of Patent Documents 1 to 3 described above are parts attached to a tip resin member made of an injection molded resin, and lose their support without the tip resin member. That is, in order to close the tip of the body, two members, a tip resin member and a barrier sheet, are required.
An object of the present invention is to provide a manufacturing apparatus and a manufacturing method for a soft container in which the tip end portion of a body portion can be closed by one sheet member.

The soft container manufacturing apparatus according to the present invention
A flexible body portion, a tip sheet member, and a tubular or annular discharge port member are provided, and the tip sheet member has a tubular peripheral side portion joined to the body portion and a tip portion of the body portion. It is composed of a self-supporting film molded body having a uniform thickness and integrally having a closing portion, and the discharge port member is joined to the outer surface of the portion of the tip sheet member that closes the tip portion of the body portion. A device for manufacturing a soft container in which the outer diameter of the discharge port member is smaller than the inner diameter of the tip portion of the body portion.
A sheet molding portion having a convex drawing mold portion and drawing and molding the tip sheet member from a blank film,
A cavity is defined at the same time as the drawing molding, and a cavity is defined between the tip sheet member, which faces the drawing die portion and closes the tip portion of the body portion of the tip sheet member, which is still held on the drawing die portion. It is characterized by comprising a discharge port molding portion for injection molding the discharge port member by injecting the material of the discharge port member into the cavity.
The method for manufacturing a soft container according to the present invention includes a flexible body portion, a tip sheet member, and a tubular or annular discharge port member, and the tip sheet member is joined to the body portion in a tubular peripheral shape. It is composed of a self-supporting film molded body having a uniform thickness and integrally having a side portion and a portion that closes the tip portion of the body portion, and is a portion of the tip sheet member that closes the tip portion of the body portion. A method of manufacturing a soft container in which the discharge port member is joined to an outer surface and the outer diameter of the discharge port member is smaller than the inner diameter of the tip portion of the body portion.
A drawing step of drawing and molding the tip sheet member from a blank film by a sheet forming portion,
A cavity is defined at the same time as the drawing molding step between the portion of the tip sheet member held by the sheet molding portion that closes the tip portion of the body portion and the discharge port molding portion facing the tip end side. , An injection molding step of injecting the material of the discharge port member into the cavity,
It is characterized by being equipped with.
The soft container includes a flexible body portion and a tip sheet member that closes the tip end portion of the body portion, and the tip sheet member comprises.
A tubular peripheral side portion joined to the body portion and
A shoulder portion whose diameter is tapered from the peripheral side portion to the tip end side, and
It may be composed of an independent film molded body having a uniform thickness and integrally having a top portion that closes the tip portion of the shoulder portion.

Self-supporting means that the film molded body constituting the tip sheet member has self-retaining property and does not require a support to be provided so as to close the tip portion of the body portion. A film molded product is a film having a certain shape.
As a result, the tip portion of the body portion can be closed by the tip sheet member alone. A support that supports the tip sheet member is not required, and the product cost can be reduced.
When discharging the fluid-like object to be contained, for example, a hole is made in the top. If the shoulder portion is tapered, the contained object can be discharged smoothly.
It is preferable that the peripheral side portion has a tapered shape in which the diameter is gradually reduced from the shoulder portion toward the shoulder portion. As a result, the tip sheet member can be easily die-cut from the molding apparatus.
It is preferable that the top portion has a dome shape that is convex from the shoulder portion toward the tip end side. As a result, the pressure resistance against the internal pressure of the contained object can be increased. In addition, the design can be enhanced.
Further, it is preferable that the shoulder portion and the top portion are smoothly continuous. As a result, it is possible to prevent a large stress from being applied to the continuous portion between the shoulder portion and the top portion.

It is preferable that a bottom sheet member that closes the bottom of the body portion is further provided, and the bottom sheet member has substantially the same shape as the tip sheet member and can be fitted into the tip sheet member.
By making a hole in the top and pushing the bottom sheet member toward the tip sheet member instead of the plunger, the contained object can be discharged. Along with this, the body is crushed. Finally, the bottom sheet member fits into the inner surface side of the tip sheet member, so that the object to be contained can be completely removed. Therefore, the waste of the contained object can be reduced.

The tip end side portion of the sheet constituting the body portion extends toward the tip end side from the tip end sheet member to form the tip extension portion, and the tip end portion of the tip extension portion is sealed. It is preferable to have.
As a result, the tip sheet member can be enclosed in the tip extension portion. Therefore, it is possible to prevent the tip sheet member from being touched directly by hand and to prevent bacteria and dust in the air from adhering to the tip sheet member, and hygiene can be improved. Even if the tip sheet member has some dents, by covering the tip sheet member with the tip extending portion, it is possible to prevent the appearance from being spoiled.

It is preferable that a tubular or annular discharge port member is joined to the outer surface of the shoulder portion of the tip sheet member, and the outer diameter of the discharge port member is smaller than the inner diameter of the tip portion of the body portion.
As a result, the discharge port member is supported by the tip sheet member. The discharge port member does not have to reach the body. Therefore, the discharge port member can be made smaller than the structure in which the discharge port member serves as a support for the tip sheet member (Patent Documents 1 to 3 and the like). The material cost can be reduced accordingly.

According to the manufacturing apparatus according to the present invention, the tip sheet member and the discharge port member can be manufactured by one device, and the manufacturing cost can be reduced.

According to the manufacturing method according to the present invention, the tip sheet member and the discharge port member can be manufactured almost at the same time, and the manufacturing cost can be reduced.

According to the present invention, the tip of the body of the soft container can be closed by one tip sheet member.

FIG. 1A is a cross-sectional view taken along the line Ia-Ia of FIG. 1B showing a soft container according to a first embodiment of the present invention in a state of being filled with an object to be contained. FIG. 1B is a cross-sectional view of the soft container along the line Ib-Ib of FIG. 1A. FIG. 1 (c) is a perspective view of a soft container unfilled with an object to be contained. FIG. 2A is an enlarged cross-sectional view showing a portion on the tip end side of the soft container. FIG. 2B is an enlarged cross-sectional view of the circular portion IIb of FIG. 2A. FIG. 3A is a cross-sectional view showing a molding apparatus for the tip sheet member and the discharge port member of the soft container in a set state of the blank film for the tip sheet member. FIG. 3B is a cross-sectional view showing the molding apparatus in a drawing state of the tip sheet member. FIG. 3C is a cross-sectional view showing the molding apparatus in an injection molded state of the discharge port member. FIG. 4A is a front view showing a stage before high frequency welding of the tip sheet member and the body portion. FIG. 4B is a front view showing a process of high-frequency welding the tip sheet member and the body portion. FIG. 5 is an enlarged cross-sectional view of a tip end side portion of the soft container according to the second embodiment of the present invention. FIG. 6A is a cross-sectional view showing a state in which a plurality of soft containers of the second embodiment are bundled. FIG. 6B is an enlarged cross-sectional view of the circular portion VIb of FIG. 6A. FIG. 7A is an enlarged cross-sectional view of the tip end side portion of the soft container according to the third embodiment of the present invention. FIG. 7B is a plan view of the discharge port member of the soft container of the third embodiment. FIG. 8A is an enlarged cross-sectional view showing the bottom portion of the soft container according to the fourth embodiment of the present invention in a state after being filled with the contents to be contained. FIG. 8B is an enlarged cross-sectional view of the circular portion VIIIb of FIG. 8A. FIG. 9 is a cross-sectional view showing the tip end portion of the soft container according to the fourth embodiment in a state in which the contained object is almost completely removed. FIG. 10A is a cross-sectional view taken along the line Xa-Xa of FIG. 10B, showing a soft container according to a fifth embodiment of the present invention in a state of being filled with an object to be contained. FIG. 10B is a cross-sectional view of the soft container along the line Xb-Xb of FIG. 10A. FIG. 11A is a cross-sectional view showing the tip end side portion of the soft container of the fifth embodiment in an opened state. FIG. 11B is a cross-sectional view showing the tip end side portion of the soft container of the fifth embodiment in a state at the time of storage after opening.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<First Embodiment>
1 to 4 show the first embodiment of the present invention. As shown in FIGS. 1A to 1C, the soft container 1 includes a body portion 10, a tip sheet member 20, and a discharge port member 30. The container 9 of the soft container 1 is, for example, a fluid or viscous material such as an adhesive, a paint, or a beverage.

The body portion 10 is, for example, one sheet 19 rolled into a tubular shape and attached to an envelope. As shown in FIG. 1 (c), the bottom of the body portion 10 of the contained object 9 before filling is open. The body portion 10 has a tapered shape that shrinks in diameter very gently from the bottom to the tip. Taper angle of the body portion 10 is, for example, preferably with respect to the axis _{L 1} of the flexible container 1 is 0.1 ° to 0.5 °, more preferably about becomes approximately 0.3 °.
As shown in FIGS. 1 (a) and 1 (b), after filling the contained object 9, the bottom portion of the body portion 10 is closed by a heat seal to form the bottom heat seal portion 12.

As shown in FIG. 2B, the sheet 19 constituting the body portion 10 has, for example, a four-layer (plurality) laminated structure. The outermost layer 14 and the innermost layer 17 of the body portion 10 are both made of linear low density polyethylene (LLDPE). This makes it possible to attach envelopes. A barrier layer 15 and a resin layer 16 are sandwiched between the outermost layer 14 and the innermost layer 17. The barrier layer 15 is made of a metal such as aluminum, and its thickness t ₁₅ is, for example, t ₁₅ = 7 μm to ₁₅ μm, preferably t ₁₅ = 12 μm. As a result, the gas barrier property can be reliably exhibited, and the flexibility of the body portion 10 can be ensured. The resin layer 16 is made of polyethylene terephthalate (PET).
The number of laminated films of the body portion 10, the thickness of each layer, the material, the seal structure, and the like are not necessarily limited to those described above, and can be appropriately modified.

A tip sheet member 20 is provided at the tip of the body 10. The tip portion of the body portion 10 is closed by the tip sheet member 20. As shown in FIG. 2A, the tip sheet member 20 integrally has a peripheral side portion 21, a shoulder portion 22, and a top portion 23. Axis of the tip seat member 20 is disposed on the axis L ₁ of the flexible container 1.
The peripheral side portion 21 has a tubular shape with a circular cross section. Specifically, the peripheral side portion 21 has a tapered shape that narrows the diameter very gently toward the tip end side (the side of the shoulder portion 22). Taper angle theta ₂₁ of the peripheral side portion 21 is aligned with the taper angle of the body portion 10, for example, preferably with respect to the axis _{L 1} of the flexible container 1 is θ ₂₁ = 0.1 ° ~0.5 ° about , More preferably, θ ₂₁ = about 0.3 °.
The tip of the body 10 is joined to the peripheral side 21. Specifically, the tip end portion of the body portion 10 covers the outer peripheral surface of the peripheral side portion 21, and the body portion 10 and the peripheral side portion 21 are welded together. Here, high-frequency welding is used as the welding method, but the welding method is not necessarily limited to this, and other welding methods such as ultrasonic welding and heat welding may be used.

A shoulder portion 22 is connected to the tip portion of the peripheral side portion 21. The shoulder portion 22 has a tapered shape (conical surface shape) whose diameter is reduced from the peripheral side portion 21 toward the tip end side (upper side in FIG. 2A). The taper θ ₂₂ angle of the shoulder portion 22 is sufficiently larger than the taper angle θ ₂₁ of the peripheral side portion 21 (θ ₂₂ > θ ₂₁ ), and is preferably about θ ₂₂ = 45 ° to 75 ° with respect to the axis L ₁ , for example. Is about θ ₂₂ = 60 °. That is, the peripheral side portion 21 is a gently tapered portion, and the shoulder portion 22 is a steeply tapered portion.
The tip (center) of the shoulder 22 is closed by the top 23. The top portion 23 has a dome shape (partially spherical shape) that is smoothly continuous with the shoulder portion 22 and is convex toward the tip end side.

The tip sheet member 20 is composed of a film molded body 28. The film molded body 28 has a uniform (uniform) thickness as a whole and is self-supporting. Self-supporting means that the film molded body 28 has self-retaining property and does not require a support such as a hard injection molding resin to be provided at the tip of the body portion 10. The self-retaining property means that the film molded body 28 retains its own shape only by the film molded body 28, and the shape does not collapse by its own weight or some external force.

As shown in FIG. 2B, the film molded body 28 and thus the tip sheet member 20 have, for example, a three-layer laminated structure. The outer layer 24 of the tip sheet member 20 is made of linear low density polyethylene (LLDPE), and the inner layer 26 is made of polyethylene terephthalate (PET). The outer layer 24 faces the outside of the soft container 1, and the inner layer 26 faces the inside of the soft container 1. A barrier layer 25 is sandwiched between the outer layer 24 and the inner layer 26. The barrier layer 25 is made of a metal such as aluminum and has a gas barrier property. The thickness t ₂₅ of the barrier layer ₂₅ is larger than the thickness t ₁₅ of the barrier layer 15 (t ₂₅ > t ₁₅ ), for example, t ₂₂ = about 30 μm to 50 μm, preferably about t ₂₂ = 40 μm. Since the barrier layer 25 is relatively thick, the film molded body 28 and thus the tip sheet member 20 are harder than the body portion 10, and are provided with self-retaining property or self-supporting property.
The number of laminated films of the film molded body 28 and thus the tip sheet member 20, the thickness of each layer, the material, and the like are not necessarily limited to the above, and can be appropriately modified.

As shown in FIG. 2A, a discharge port member 30 is provided on the outer surface of the tip sheet member 20. The material of the discharge port member 30 is a hard resin such as polyethylene (PE) or polypropylene (PP). The discharge port member 30 integrally includes a discharge port portion 31 and a flange portion 32. The discharge port portion 31 has a tubular shape and protrudes from the tip sheet member 20 toward the tip side (upper side in FIG. 2A). The axis of the discharge port portion 31 is coincident with the axis L ₁ of the flexible container 1. A male screw portion 31b is formed on the outer peripheral surface of the discharge port portion 31. Although not shown, a nozzle or cap with a female screw is attached to the discharge port 31.

A collar portion 32 is formed at the base end side (the side facing the tip sheet member 20) of the discharge port portion 31. The flange portion 32 protrudes outward in the radial direction from the outer circumference of the discharge port portion 31, and has an annular shape over the entire circumference of the discharge port portion 31. The bottom surface of the collar portion 32 is joined to the outer surface of the shoulder portion 22. As a result, the discharge port member 30 is supported by the tip sheet member 20. That is, the tip sheet member 20 and thus the film molded body 28 are not only self-supporting, but also have strength or hardness enough to support other members (discharge port member 30).
The outer diameter of the flange portion 32, and thus the outer diameter of the discharge port member 30, is smaller than the inner diameter of the tip portion of the body portion 10. The discharge port member 30 is not in direct contact with the body portion 10, but is connected to the body portion 10 via the tip sheet member 20.
The opening on the base end side (lower side in FIG. 2A) of the discharge port portion 31 is closed by the top portion 23. The dome-shaped top portion 23 is slightly inserted into the discharge port portion 31.

The soft container 1 is manufactured as follows.
<Molding equipment 50 (soft container manufacturing equipment)>
As shown in FIG. 3, the tip sheet member 20 and the discharge port member 30 in the soft container 1 are manufactured by a molding apparatus 50 (soft container manufacturing apparatus). As shown in FIG. 3A, the molding apparatus 50 includes a first mold 51, a second mold 52, and a third mold 53. These molds 51 to 53 are sequentially arranged from bottom to top.
The first mold 51 has a convex drawing mold portion 51b. The tip (upper end) of the drawing mold portion 51b has a conical surface shape that matches the shape of the tip sheet member 20. A sheet set portion 52c formed of an annular recess is formed in the second mold 52. The sheet forming portion 50b is mainly composed of the first mold 51, the second mold 52, and the third mold 53, which are described later, the drawing receiving portion 53b and the sheet pressing portion 53c .
The third mold 53 has a conical concave drawing receiving portion 53b and a cylindrical concave injection mold portion 53d with a screw groove. An injection mold portion 53d is provided at the center of the diaphragm receiving portion 53b.
The top plate 54 is arranged on the upper part of the third mold 53. An injection nozzle 55 is provided at the center of the top plate 54. The injection nozzle 55 is inserted into the cylindrical concave injection mold portion 53d.
The injection port molding portion 50c is mainly composed of the injection mold portion 53d of the third mold 53 and the injection nozzle 55. The discharge port molding portion 50c is arranged to face the tip side (upper side) of the sheet molding portion 50b.
The third mold 53 is divided into a plurality of pieces (two on the left and right in FIG. 3) 63a. The third mold 53 can be opened and closed by separating or approaching these pieces 63a about the injection nozzle 55.

<Aperture process>
As shown in FIG. 3A, a disk-shaped blank film 29 (pre-molded film) to be the tip sheet member 20 is set in the sheet set portion 52c. The second mold 52 and the third mold 53 are brought close to each other, and the outer peripheral portion of the blank film 29 is pressed by the sheet pressing portion 53c of the third mold 53.
Subsequently, as shown in FIG. 3B, the first mold 51 and the second mold 52 are brought close to each other and molded. By the mold clamping, the drawing mold portion 51b protrudes from the center hole of the sheet setting portion 52c and enters the drawing receiving portion 53b while drawing and deforming the blank film 29. As a result, the sheet forming portion 50b draws and forms the film molded body 28 and thus the tip sheet member 20 from the blank film 29.
Barrier layer 25 thicker than the barrier layer 15 of the body 10 (preferably theta ₂₅ = 30-50 microns, more preferably about theta ₂₅ = about 40 [mu] m) by leaving the barrier layer 25 that breaks during drawing Can be prevented. Incidentally, when the barrier layer 25 has the same thickness as the barrier layer 15 (for example, θ ₂₅ = about 10 μm to 15 μm), it is easily torn during drawing molding.

<Injection molding process>
At the same time that the tip sheet member 20 is drawn and molded, a cavity 50d is defined between the tip sheet member 20 and the inner surface of the injection mold portion 53d above (tip side) and the outer peripheral surface of the injection nozzle 55. Will be done. Further, the diaphragm receiving portion 53b hits the shoulder portion 22, and the lower end surface of the injection nozzle 55 hits the top portion 23.
Subsequently, as shown in FIG. 3C, the molten resin 39 (material of the discharge port member 30) is transferred from the injection path 55a of the injection nozzle 55 to the cavity 50d while the tip sheet member 20 is held by the sheet molding portion 50b. Inject. As a result, the discharge port member 30 can be injection-molded at the same time as or immediately after the drawing molding of the tip sheet member 20. Moreover, at the same time as injection molding, the discharge port member 30 can be integrally joined with the tip sheet member 20 due to the adhesiveness of the molten resin 39.
After that, the molds 51 to 53 are separated from each other to release the mold clamping, and the tip sheet member 20 with the discharge port member 30 is removed from the mold. Since the peripheral side portion 21 has a gentle taper shape, the tip sheet member 20 can be easily die-cut.
As a result, the tip sheet member 20 and the discharge port member 30 are manufactured. The tip sheet member 20 and the discharge port member 30 can be efficiently manufactured by one molding device 50, and the manufacturing cost can be reduced.

Next, as shown in FIG. 4, the separately prepared body portion 10 and the tip sheet member 20 with the discharge port member 30 are joined.
Specifically, as shown in FIG. 4A, a core metal 61 is prepared as a joining jig. The core metal 61 has a columnar shape and is gradually reduced in diameter toward the tip side (upper side).
The tip sheet member 20 (with the discharge port member 30) is put on the tip (upper end) of the core metal 61.
Next, the body portion 10 is put on the outer circumference of the core metal 61 from above. As a result, the tip end portion (upper end portion) of the body portion 10 covers the outer peripheral portion of the peripheral side portion 21. By forming both the body portion 10 and the peripheral side portion 21 in a tapered shape, the body portion 10 can be brought into close contact with the entire circumference of the peripheral side portion 21.
Next, as shown in FIG. 4B, an annular high-frequency welding device 60 is set outside the tip of the core metal 61, and the tip of the body 10 and the peripheral side 21 are high-frequency welded.
After that, the soft container 1 is removed from the core metal 61.
As a result, the soft container 1 (the container 9 is not filled) can be produced.

According to the soft container 1, the tip portion of the body portion 10 can be closed by the tip sheet member 20 alone. A support for supporting the tip sheet member 20 is unnecessary, and the product cost can be reduced.
The flange portion 32 of the discharge port member 30 does not need to reach the body portion 10, and the discharge port member 30 is more than a structure in which the discharge port member 30 serves as a support for the tip sheet member 20 (Patent Documents 1 to 3 and the like). Can be made smaller. The material cost can be reduced accordingly.
The bottom of the soft container 1 in which the container 9 is not filled is open. Another soft container 1 can be inserted into the inside through the bottom opening. Since the body portion 10 is slightly tapered, the insertion operation can be facilitated. Further, by inserting a plurality of soft containers 1, 1 ... In a row in order and bundling them, the size can be reduced (see FIG. 6A). As a result, the storage space for the plurality of soft containers 1, 1 ... Can be reduced, and the efficiency of transportation and the like can be improved.

The container 9 is filled into the soft container 1 from the bottom of the soft container 1. After filling, the bottom of the soft container 1 is heat-sealed. As a result, the soft container 1 is sealed. The barrier layer 15 of the body portion 10 and the barrier layer 25 of the tip sheet member 20 can prevent outside air from entering the soft container 1. As a result, the quality of the contained object 9 can be maintained for a long period of time.
Since the shoulder portion 22 and the top portion 23 are smoothly continuous, it is possible to prevent a large stress from being applied to the continuous portion of the shoulder portion 22 and the top portion 23. Further, by forming the top portion 23 into a dome shape, the pressure resistance against the internal pressure of the contained object 9 can be increased. Further, the design can be enhanced.

When using the object 9 to be contained, for example, a hole is made in the top 23. A nozzle (not shown) attached to the male screw portion 31b may be sharpened, and the tip of the nozzle may be inserted into the discharge port member 30 and pierced into the top portion 23 to open the hole. By setting the thickness of the barrier layer 25 to about 30 to 50 μm, preferably about 40 μm, it is possible to prevent the opening operation from being hindered.
The opened soft container 1 is set in, for example, a discharge gun, and the body portion 10 is crushed in the axial direction with a plunger of the discharge gun. As a result, the object 9 is discharged from the discharge port member 30 through the opening portion of the top portion 23. Since the shoulder portion 22 has a tapered shape, the contained object 9 can be smoothly discharged.

Next, other embodiments of the present invention will be described. In the following embodiments, the same reference numerals are given to the drawings for configurations that overlap with the above-described embodiments, and the description thereof will be omitted.
<Second Embodiment>
FIG. 5 shows a second embodiment of the present invention. As shown in FIG. 5, the soft container 1B of the second embodiment is not provided with the discharge port member 30. The entire outer surface of the shoulder portion 22 and the top portion 23 of the tip sheet member 20 faces the outside of the soft container 1B.
As shown in FIG. 6, in the second embodiment, when another soft container 1B is inserted into the inside from the open portion of the bottom portion (lower end in FIG. 6A) of the soft container 1B, these soft containers 1B, The tip sheet members 20 and 20 of 1B can be inserted deeply until they almost overlap each other. Therefore, by sequentially inserting the plurality of soft containers 1B, 1B ... In a row and bundling them, the plurality of soft containers 1B, 1B ... Can be stored and transported in a more compact state.

<Third Embodiment>
FIG. 7 shows a third embodiment of the present invention. As shown in FIG. 7B, the tip sheet member 20 of the soft container 1C of the third embodiment has an annular (ring-shaped) discharge instead of the discharge port member 30 of the first embodiment (FIG. 1). An outlet member 30C is provided. As shown in FIG. 7A, the discharge port member 30C is supported by the tip sheet member 20 by being joined to the outer surface of the shoulder portion 22. The outer diameter of the discharge port member 30C is sufficiently smaller than the inner diameter of the tip portion of the body portion 10. The discharge port member 30C is not in direct contact with the body portion 10. Further, the height of the discharge port member 30C (the vertical dimension in FIG. 7A) is sufficiently smaller than that of the discharge port member 30 of the first embodiment (FIG. 2A). Although not shown, the nozzle of the discharge gun can be connected to the discharge port member 30C.
The tip sheet member 20 with the discharge port member 30C can be manufactured by the same method as in the first embodiment.

<Fourth Embodiment>
8 to 9 show a fourth embodiment of the present invention. As shown in FIG. 8A, in the soft container 1D of the fourth embodiment, the bottom sheet member 40 is provided at the bottom of the body portion 10 after the container 9 is filled. The bottom of the body 10 is closed by the bottom sheet member 40. The bottom sheet member 40 has substantially the same shape as the tip sheet member 20. That is, the bottom sheet member 40 integrally has a gently tapered peripheral side portion 41, a steeply tapered shoulder portion 42, and a dome-shaped top portion 43. Moreover, the bottom sheet member 40 is composed of the second film molded body 48. The second film molded body 48 has a uniform (uniform) thickness as a whole and is self-supporting. The second film molded body 48 can be produced by drawing molding in the same manner as the film molded body 28.
Further, as shown in FIG. 8B, the film molded body 48 and thus the bottom sheet member 40 have the same laminated structure as the tip sheet member 20. That is, the bottom sheet member 40 includes an outer layer 44 made of linear low density polyethylene (LLDPE), an inner layer 46 made of polyethylene terephthalate (PET), and an intermediate barrier layer 45 made of aluminum. The thickness of the barrier layer 45 and the like are the same as those of the barrier layer 25.
The number of laminated films of the bottom sheet member 40, the thickness of each layer, the material, and the like are not necessarily limited to the above, and can be appropriately modified. Further, the shape and size of the bottom sheet member 40 may be slightly different from those of the tip sheet member 20.

The bottom sheet member 40 is joined to the bottom of the body portion 10. Specifically, the bottom portion of the body portion 10 covers the outer peripheral surface of the peripheral side portion 41, and the body portion 10 and the peripheral side portion 41 are welded together. Here, high-frequency welding is used as the welding method, but the welding method is not necessarily limited to this, and other welding methods such as ultrasonic welding and heat welding may be used.

The bottom sheet member 40 is a substitute for the plunger. That is, as shown in FIG. 9, by making a hole in the top 23 of the tip sheet member 20 and pushing the bottom sheet member 40 axially toward the tip sheet member 20, the contained object 9 can be discharged. .. Along with this, the body portion 10 is crushed. As shown in FIG. 9, finally, the bottom sheet member 40 is fitted into the inner surface side of the tip sheet member 20. As a result, the contained object 9 can be completely removed, and the waste of the contained object 9 can be reduced.

<Fifth Embodiment>
10 and 11 show a fifth embodiment of the present invention. As shown in FIGS. 10A and 10B, in the soft container 1E of the fifth embodiment, the tip end side portion (upper portion in the figure) of the sheet 19 constituting the body portion 10 is the tip end. It extends toward the tip end side (upper side in the figure) from the seat member 20 and the discharge port member 30, and constitutes the tip extension portion 11.
The base end portion (lower end portion in the figure) of the tip extending portion 11 is circular along the outer circumference of the tip sheet member 20 and is integrally connected to the body portion 10.
The tip end portion (upper end portion in the figure) of the tip extension portion 11 is sealed by superimposing one side portion and the other side portion in the circumferential direction and heat-sealing to form a sealing portion 13. The internal space 11d of the tip extending portion 11 between the tip sheet member 20 and the sealing portion 13 is sealed.

As shown in FIG. 10A, a semicircular recess 13d is formed in the bottom portion (lower side portion in the figure) of the sealing portion 13. The internal space 11d of the tip extending portion 11 has entered the inside of the semicircular recess 13d.
A notch 13e is formed near the bottom portion of one side edge (left edge in FIG. 10A) of the sealing portion 13.
Further, a hook hole 13f (eyelet) is formed in the sealing portion 13. By passing a hook or the like through the hook hole 13f, the soft container 1E can be suspended and stored.

In the soft container 1E of the fifth embodiment, the tip sheet member 20 and the discharge port member 30 can be sealed in the tip extending portion 11. Therefore, when transporting or storing the soft container 1E, the tip sheet member 20 and the discharge port member 30 may not be touched directly by hand, and bacteria and dust in the air may enter the tip sheet member 20 and the discharge port member 30. It can prevent adhesion and improve hygiene. In particular, it is effective when the contained object 9 is a food material such as a beverage or a chemical solution that requires hygiene management. In addition, it is possible to prevent dust and the like from entering the inside of the discharge port member 30 and clogging the inside.
Further, in the soft container 1E, even if the tip sheet member 20 has some dents, the tip extending portion 11 covers the tip sheet member 20 to prevent the tip sheet member 20 from being spoiled in appearance.

As shown in FIG. 11A, when the soft container 1E is used, the sealing portion 13 is cut in the width direction (left and right in the figure) triggered by the notch 13e. As a result, the sealing portion 13 on the tip side of the notch 13e can be cut off. The tip extending portion 11 on the body portion 10 side of the notch 13 is left behind. Further, when the cut end 11e crosses the semicircular recess 13d, the internal space 11d of the tip extending portion 11 is opened through the cut end 11e. As shown by the alternate long and short dash line in FIG. 11A, the base end portion of the nozzle 2 is inserted into the tip extending portion 11 through the cut end 11e (opening), and the discharge nozzle 2 is attached to the discharge port member 30. .. Further, the top portion 23 of the tip sheet member 20 is opened (see FIG. 11B). As a result, the object 9 to be contained can be discharged from the nozzle 2.

As shown in FIG. 11B, when storing the soft container 1E after opening, it is preferable to remove the nozzle 2 and close the cut end 11e with the adhesive tape 3. As a result, it is possible to prevent or suppress the invasion of air into the soft container 1E, and it is possible to prevent or suppress the deterioration or deterioration of the contained object 9.
The tip end port of the nozzle 2 may be closed by wrapping a film or the like with the nozzle 2 attached.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the top 23 may be flat.
Independence may be ensured by selecting the thickness and material of the resin layer of the sheet molded body 28.
Multiple embodiments may be combined with each other. For example, the bottom sheet member 40 of the fourth embodiment (FIGS. 8 to 9) may be applied to the second embodiment (FIGS. 5 to 6) or the third embodiment (FIG. 7). The tip extending portion 11 of the fifth embodiment (FIG. 10) may be applied to the second embodiment (FIGS. 5 to 6) or the third embodiment (FIG. 7).

The present invention is applicable, for example, as a discharge gun cartridge for a fluid or viscous material such as an adhesive or paint.

1,1B, 1C, 1D, 1E Soft container 2 Discharge nozzle 3 Adhesive tape 9 Contents 10 Body 11 Tip extension 11d Inside 11e Cut 13 Sealing 13d Semi-circular recess 13e Notch 13f Hook hole 19 Sheet 20 Tip sheet member 21 Peripheral side 22 Shoulder 23 Top 24 Outer layer 28 Film molded body 29 Blank film (pre-molded film)
30, 30C Discharge port member 39 Molten resin (material of discharge port member)
40 Bottom sheet member 41 Peripheral side 42 Shoulder 43 Top 48 Second film molded body 50 Molding device (soft container manufacturing device)
50b Sheet molding part 50c Discharge port molding part 50d Cavity 51b Squeeze mold part 53d Injection mold part
55 injection nozzle

Claims (2)

A flexible body portion, a tip sheet member, and a tubular or annular discharge port member are provided, and the tip sheet member has a tubular peripheral side portion joined to the body portion and a tip portion of the body portion. It is composed of a self-supporting film molded body having a uniform thickness and integrally having a closing portion, and the discharge port member is joined to the outer surface of the portion of the tip sheet member that closes the tip portion of the body portion. A device for manufacturing a soft container in which the outer diameter of the discharge port member is smaller than the inner diameter of the tip portion of the body portion.
A sheet molding portion having a convex drawing mold portion and drawing and molding the tip sheet member from a blank film,
A cavity is defined at the same time as the drawing molding, and a cavity is defined between the tip sheet member, which faces the drawing die portion and closes the tip portion of the body portion of the tip sheet member, which is still held on the drawing die portion. A discharge port molding portion for injection molding the discharge port member by injecting the material of the discharge port member into the cavity is provided .
The sheet molding portion further includes a sheet set portion having a center hole, a sheet pressing portion that faces the sheet set portion and temporarily presses the outer peripheral portion of the blank film, and a diaphragm receiving portion. By projecting the portion from the center hole, the drawing is performed while pulling out the outer peripheral portion from between the sheet setting portion and the sheet pressing portion, and at the same time, the drawing receiving portion is formed on the tip sheet member. The outer peripheral portion of the portion that closes the tip portion of the body portion is pressed from the side opposite to the drawing mold portion.
The discharge port molding portion is provided in the central portion of the throttle receiving portion to form a cylindrical concave injection mold portion that forms the outer periphery of the discharge port member, and the discharge port member is inserted into the injection mold portion. A soft container manufacturing apparatus having an injection nozzle for molding an inner circumference, wherein the cavity is defined between an inner surface of the injection mold portion and an outer surface of the injection nozzle . A flexible body portion, a tip sheet member, and a tubular or annular discharge port member are provided, and the tip sheet member has a tubular peripheral side portion joined to the body portion and a tip portion of the body portion. It is composed of a self-supporting film molded body having a uniform thickness and integrally having a closing portion, and the discharge port member is joined to the outer surface of the portion of the tip sheet member that closes the tip portion of the body portion. A method of manufacturing a soft container in which the outer diameter of the discharge port member is smaller than the inner diameter of the tip portion of the body portion.
The blank is temporarily pressed by the sheet set portion and the sheet presser portion of the sheet molding portion, and then the drawing mold portion of the sheet molding portion is projected from the center hole of the sheet set portion. A drawing step of drawing and molding the tip sheet member from the blank film while pulling out the outer peripheral portion of the film from between the sheet setting portion and the sheet pressing portion .
At the same time as the drawing step, a step of pressing the outer peripheral portion of the tip sheet member in the portion closing the tip portion of the body portion by the drawing receiving portion from the side opposite to the drawing mold portion.
A portion inside the outer peripheral portion of the portion of the tip sheet member that is held by the drawing mold portion and the drawing receiving portion of the sheet molding portion and that closes the tip portion of the body portion, and a discharge facing the tip side thereof. An injection molding step in which a cavity is defined with the outlet molding portion at the same time as the drawing step and the material of the discharge port member is injected into the cavity.
A method for manufacturing a soft container, which is characterized by being provided with.

Images