JP2018083646A - Lamination layer detached container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a production method of a lamination layer detached container which has superior productivity.SOLUTION: According to this invention, a production method of a lamination layer detached container comprises: a container body forming step for forming a container body having an outer shell and an inner bag; an outside air introducing hole forming step for forming an outside air introducing hole for penetrating only the outer shell of the container body on a storage portion which stores contents; a pushing step which pushes an edge portion of the inner bag side of the outside air introducing hole; and a valve member mounting step for mounting a valve member capable of opening and closing the outside air introducing hole to the outer shell.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a delamination container.

Conventionally, a container body having an outer shell and an inner bag, and the inner bag peels off from the outer shell and shrinks as the contents are reduced, an intermediate space between the outer shell and the inner bag, and an outer space of the container body A lamination peeling container provided with a check valve that adjusts the flow of air between the two is known (for example, Patent Documents 1 and 2).
In patent document 1, the valve is incorporated in the cap attached to the opening | mouth part of a container main body.
In patent document 2, the valve is provided inside the trunk | drum of an outer shell.

JP 2013-35557 A JP-A-4-267727

  In the configuration of Patent Document 1, the structure of the cap becomes complicated, leading to an increase in production cost. In the configuration of Patent Document 2, a troublesome process of adhering a check valve to the inside of the body portion of the outer shell is required, leading to an increase in production cost.

  This invention is made | formed in view of such a situation, and provides the manufacturing method of the lamination peeling container excellent in productivity.

  According to the present invention, a container body forming step for forming a container body having an outer shell and an inner bag, and an outside air introduction hole penetrating only the outer shell in a container housing the contents of the container body are formed. An outside air introduction hole forming step, a pressing step of pressing the edge portion of the outside air introduction hole on the inner bag side, and a valve member attaching step of attaching a valve member capable of opening and closing the outside air introduction hole to the outer shell. A method for producing a delamination container is provided.

  As a result of intensive studies, the inventor has formed an outside air introduction hole in the outer shell, and the valve member can be attached to the outer shell by pushing the valve member into the outside air introduction hole of the outer shell from the outside of the outer shell. did. According to such a structure, since it is not necessary to provide a check valve in the cap and the valve member can be easily attached, the structure is simple and the productivity is high.

  Further, when a further detailed study was conducted, it was found that when the outside air introduction hole was formed in the outer shell, burrs were generated in the outside air introduction hole and could interfere with the valve member.

  As a result of examining measures against such problems, by performing a pressing step of pressing the inner bag side edge of the outside air introduction hole toward the outside in the radial direction of the outside air introduction hole before the valve member mounting step. The present inventors have found that it is possible to prevent the burr from tilting outward with respect to the outside air introduction hole and interfering with the valve member, thereby completing the present invention.

  Hereinafter, various embodiments of the present invention will be exemplified. The following embodiments can be combined with each other.

  Preferably, in the pressing step, the inner bag side edge of the outside air introduction hole is pressed by an insertion tool inserted into the outside air introduction hole.

  Preferably, the insertion tool has an expanded diameter portion having a larger diameter than the outside air introduction hole, and the edge portion is pressed by inserting the expanded diameter portion into the outside air introduction hole.

  Preferably, the insertion tool has a distal end portion having a diameter smaller than that of the expanded diameter portion on the distal end side of the expanded diameter portion, and the inner bag is pushed into the inside of the container body by the distal end portion. The inner bag is separated from the outer shell before the diameter portion is inserted into the outside air introduction hole.

  Preferably, the distal end side and the proximal end side of the expanded diameter portion are each formed in a taper shape, and the inclination on the proximal end side of the expanded diameter portion is formed more gently than the inclination on the distal end side of the expanded diameter portion.

  According to the present invention, there is provided a container body having an outer shell and an inner bag, and the inner bag shrinks from the outer shell as the contents are reduced, and an outside air introduction hole penetrating only the outer shell. A delamination container including a valve member that can be opened and closed, wherein the valve member is inserted into the outside air introduction hole and is slidable with respect to the outside air introduction hole, and the inner bag of the shaft part And a lid portion having a cross-sectional area larger than that of the shaft portion, and a burr formed at an edge portion of the outside air introduction hole on the inner bag side faces outward with respect to the outside air introduction hole. A delamination container is provided that is inclined.

  Preferably, the lid portion has an inclined surface which is inclined toward the shaft portion side and abuts against an edge portion of the outside air introduction hole on the inner bag side, and an inclination angle of the burr is set to be inclined. It is formed so as to be substantially the same as the inclination angle of the surface or larger than the inclination angle of the inclined surface.

It is a perspective view of the lamination peeling container 1 of 1st Embodiment of this invention. FIG. 2 is an enlarged cross-sectional view of the vicinity of an opening 9 and an outside air introduction hole 15 of the delamination container 1 in FIG. 1. It is an enlarged view of the valve member 5, (a) is a perspective view, (b) is a side view. 3 is a cross-sectional view showing a layer configuration of an outer layer 11 and an inner layer 13. FIG. The manufacturing process of the lamination peeling container 1 of FIG. 1 is shown. FIG. 6 shows a manufacturing process of the delamination container 1 of FIG. 1 subsequent to FIG. 5, and particularly shows an outside air introduction hole formation and an inner layer preliminary peeling process. FIG. 6 shows a configuration of a drill 30 used for forming the outside air introduction hole 15, (a) is a front view, (b) is a left side view, (c) is an AA cross-sectional view, and (d) is a cross-sectional view. An enlarged view of region B, (e) is an enlarged view of region C. FIG. FIG. 6 shows another configuration of the drill 30 used for forming the outside air introduction hole 15, where (a) is a front view and (b) is a left side view. The manufacturing process following FIG. 6 of the lamination peeling container 1 of FIG. 1 is shown, and an inner bag separation process and a press process are shown especially. It is explanatory drawing of the inner bag separation | spacing process and press process of FIG. 9, (a)-(c) shows an inner bag separation | spacing process, (c)-(e) shows a pressing process. It is explanatory drawing which shows a mode that the burr | flash Br formed in the external air introduction hole 15 deform | transforms in the press process of FIG. It is a figure which shows the state which mounted | wore the external air introduction hole 15 with the valve member 5, (a) is a side view, (b) is a principal part enlarged view of (a). The process following FIG. 9 of the lamination peeling container 1 of FIG. 1 is shown. It is explanatory drawing which shows the usage method of the lamination peeling container 1 of FIG. It is a figure which shows another method of the inner bag separation process of FIG. 9, and a press process, (a)-(b) shows an inner bag separation process, (c) shows a press process.

  Hereinafter, embodiments of the present invention will be described. Various characteristic items shown in the following embodiments can be combined with each other. The invention is established independently for each feature.

  As shown in FIG. 1, a delamination container 1 according to an embodiment of the present invention includes a container body 3 and a valve member 5. The container body 3 includes a storage portion 7 that stores the contents, and a mouth portion 9 that discharges the contents from the storage portion 7.

  As shown in FIG. 2, the container body 3 includes an outer layer 11 and an inner layer 13 in the accommodating portion 7 and the mouth portion 9, an outer shell 12 is constituted by the outer layer 11, and an inner bag 14 is constituted by the inner layer 13. The As the content decreases, the inner layer 13 peels from the outer layer 11, whereby the inner bag 14 peels from the outer shell 12 and contracts.

  The mouth portion 9 is provided with a male screw portion 9d. A cap or a pump having a female screw is attached to the male screw portion 9d. FIG. 2 shows a part of the cap 23 having the inner ring 25. The outer diameter of the inner ring 25 is substantially the same as the inner diameter of the mouth portion 9, and the outer surface of the inner ring 25 abuts against the abutting surface 9a of the mouth portion 9, thereby preventing leakage of the contents.

  In addition, the accommodating portion 7 is provided with a valve member 5 that adjusts the flow of air between the intermediate space 21 between the outer shell 12 and the inner bag 14 and the outer space S of the container body 3. The outer shell 12 is provided with an outside air introduction hole 15 that communicates the intermediate space 21 and the outer space S in the housing portion 7. The outside air introduction hole 15 is a through hole provided only in the outer shell 12 and does not reach the inner bag 14. As shown in FIGS. 2 and 3, the valve member 5 includes a shaft portion 5 a disposed in the outside air introduction hole 15 and a lid having a shape capable of closing the outside air introduction hole 15 and disposed in the intermediate space 21. A locking portion 5b provided on the outer space S side of the shaft portion 5a and preventing the valve member 5 from entering the inside of the outer shell 12 is provided. The diameter of the shaft portion 5 a is smaller than the diameter of the outside air introduction hole 15 and is slidable relative to the outside air introduction hole 15. Moreover, the diameter of the cover part 5c is larger than the diameter of the external air introduction hole 15, and the cross-sectional area is larger than the axial part 5a.

  The lid portion 5c is configured to close the outside air introduction hole 15 when the outer shell 12 is compressed, and includes a tapered surface 5d so that the cross-sectional area decreases as the shaft portion 5a is approached. The inclination angle θ1 of the tapered surface 5d shown in FIG. 3B is preferably 15 to 45 degrees with respect to the direction D in which the shaft portion 5a extends, and more preferably 20 to 35 degrees. This is because if the inclination angle θ1 is too large, air leakage tends to occur, and if it is too small, the valve member 5 becomes long.

  With such a configuration, when the outer shell 12 is compressed, the pressure in the intermediate space 21 becomes higher than the external pressure, and the lid portion 5c is further strongly pressed against the outside air introduction hole 15 by this pressure difference, and the lid portion 5 c closes the outside air introduction hole 15. Since the lid portion 5c is provided with the tapered surface 5d, the lid portion 5c easily fits into the outside air introduction hole 15 and closes the outside air introduction hole 15.

  When the outer shell 12 is further compressed in this state, the pressure in the intermediate space 21 is increased. As a result, the inner bag 14 is compressed and the contents in the inner bag 14 are discharged. Further, when the compressive force applied to the outer shell 12 is released, the outer shell 12 tries to recover by its own elasticity. At this time, the lid portion 5 c is separated from the outside air introduction hole 15, the outside air introduction hole 15 is released from being blocked, and outside air is introduced into the intermediate space 21. In addition, a flow passage 5w is provided in the locking portion 5b so that the locking portion 5b does not block the outside air introduction hole 15, and even when the locking portion 5b is in contact with the outer shell 12, the flow is prevented. Outside air can be introduced into the intermediate space 21 through the passage 5 w and the outside air introduction hole 15.

  The valve member 5 can be attached to the container main body 3 by inserting the lid portion 5 c into the intermediate space 21 while the lid portion 5 c expands the outside air introduction hole 15. Therefore, it is preferable that the tip of the lid portion 5c has a tapered shape. Such a valve member 5 can be mounted simply by pushing the lid 5c into the intermediate space 21 from the outside of the container body 3, and thus is excellent in productivity. The valve member 5 is molded by injection molding or the like.

  The accommodating part 7 is covered with a shrink film after the valve member 5 is attached. At this time, the valve member 5 is mounted in a valve member mounting recess 7 a provided in the housing portion 7 so that the valve member 5 does not interfere with the shrink film. Further, an air flow groove 7b extending from the valve member mounting recess 7a in the direction of the mouth 9 is provided so that the valve member mounting recess 7a is not sealed with the shrink film (see FIG. 1).

  Next, the layer configuration of the container body 3 will be described with reference to FIG. The container body 3 includes an outer layer 11 and an inner layer 13. The outer layer 11 is formed to be thicker than the inner layer 13 so that the restoring property is high.

  The outer layer 11 is composed of, for example, low density polyethylene, linear low density polyethylene, high density polyethylene, polypropylene, an ethylene-propylene copolymer, and a mixture thereof. The outer layer 11 may have a multi-layer configuration. For example, as shown in FIG. 4, the repro layer 11 c may be sandwiched between layers 11 a and 11 b formed of virgin material. Here, the repro layer refers to a layer that is used by recycling burrs produced during the molding of the container. Moreover, the outer layer 11 is formed thicker than the inner layer 13 so that the restoring property becomes high. The outer layer 11 is preferably made of a random copolymer between propylene and another monomer. The monomer copolymerized with propylene may be any monomer that improves the impact resistance of the random copolymer when compared with a polypropylene homopolymer, and ethylene is particularly preferable. In the case of a random copolymer of propylene and ethylene, the ethylene content is preferably 5 to 30 mol%. The weight average molecular weight of the random copolymer is preferably from 100,000 to 500,000, more preferably from 100,000 to 300,000. The tensile modulus of the random copolymer is preferably 400 to 1600 MPa, and preferably 1000 to 1600 MPa. This is because the shape restoring property is particularly good when the tensile elastic modulus is in such a range. If the container is excessively hard, the feeling of use of the container is deteriorated. Therefore, for example, a flexible material such as linear low-density polyethylene may be mixed with the random copolymer to form the outer layer 11.

  The inner layer 13 includes an EVOH layer 13a provided on the outer surface side of the container, an inner surface layer 13b provided on the container inner surface side of the EVOH layer 13a, and an adhesive layer 13c provided between the EVOH layer 13a and the inner surface layer 13b. . By providing the EVOH layer 13a, the gas barrier property and the peelability from the outer layer 11 can be improved.

  The EVOH layer 13a is a layer made of an ethylene-vinyl alcohol copolymer (EVOH) resin, and is obtained by hydrolysis of ethylene and vinyl acetate copolymer. The ethylene content of the EVOH resin is, for example, 25 to 50 mol%, and preferably 32 mol% or less from the viewpoint of oxygen barrier properties. Although the minimum of ethylene content is not prescribed | regulated, since the softness | flexibility of EVOH layer 13a tends to fall, so that ethylene content is small, 25 mol% or more is preferable. The EVOH layer 13a preferably contains an oxygen absorbent. By containing the oxygen absorbent in the EVOH layer 13a, the oxygen barrier property of the EVOH layer 13a can be further improved.

  The inner surface layer 13b is a layer that comes into contact with the contents of the delamination container 1, and is, for example, a polyolefin such as low density polyethylene, linear low density polyethylene, high density polyethylene, polypropylene, ethylene-propylene copolymer, and a mixture thereof. It is preferably made of low-density polyethylene or linear low-density polyethylene. 50-300 MPa is preferable and, as for the tensile elasticity modulus of resin which comprises the inner surface layer 13b, 70-200 MPa is preferable. This is because the inner surface layer 13b is particularly flexible when the tensile elastic modulus is in such a range. Specifically, the tensile elastic modulus is, for example, 50, 100, 150, 200, 250, or 300 MPa, and may be in a range between any two of the numerical values exemplified here.

  The adhesive layer 13c is a layer having a function of adhering the EVOH layer 13a and the inner surface layer 13b. And ethylene vinyl acetate copolymer (EVA). An example of the adhesive layer 13c is a mixture of low-density polyethylene or linear low-density polyethylene and acid-modified polyethylene.

  Next, an example of the manufacturing method of the lamination peeling container 1 of this embodiment is demonstrated.

  First, as shown in FIG. 5 (a), a laminated structure corresponding to the container body 3 to be manufactured (one example is PE layer / adhesive layer / EVOH layer / PP layer / repro layer / PP layer in order from the container inner surface side). The laminated parison in a molten state provided with the laminated structure is extruded into a split mold for blow molding, and the split mold is closed. Next, as shown in FIG.5 (b), a blow nozzle is inserted in the opening part by the side of the opening | mouth part 9 of the container main body 3, and air is blown in in the cavity of a division mold in the state which clamped.

  Next, as shown in FIG.5 (c), a division | segmentation metal mold | die is opened and a blow molded product is taken out. The split mold has a cavity shape such that various shapes of the container body 3 such as the valve member mounting recess 7a, the air circulation groove 7b, and the bottom seal protrusion 27 are formed in the blow molded product. Further, the split mold is provided with a pinch-off portion below the bottom seal protrusion 27, and a lower burr is formed at a lower portion of the bottom seal protrusion 27, and is thus removed. The container main body 3 having the outer shell 12 and the inner bag 14 is formed by the above steps (container main body forming step).

  Next, as shown in FIG.5 (d), the taken-out container main body 3 is aligned.

  Next, as shown in FIGS. 6A to 6C, the outside air introduction hole 15 is formed in the outer shell 12 of the container body 3 using the perforation apparatus 2 (outside air introduction hole forming step). Hereinafter, this process will be described in detail.

  First, as shown in FIG. 6A, the container main body 3 is set at a position close to the punching device 2. The drilling device 2 includes a drilling drill 30 having a main body 31 and a tip 32, and a motor 2c that rotationally drives the drilling drill 30 through the transmission belt 2b. The piercing device 2 is supported by a servo cylinder (not shown) that moves the piercing device 2 in a single axis by the rotation of a servo motor. The direction of the arrow X1 in FIG. 6A and the direction of the arrow X2 in FIG. It is configured to be movable. With this configuration, the tip 32 can be pressed against the outer shell 12 of the container body 3 while rotating the drilling drill 30. Further, the tact time can be shortened by controlling the position and moving speed of the punching device 2 with a servo motor.

  The drilling drill 30 is provided with a cavity 33 extending from the main body 31 to the tip 32 (see FIGS. 7 and 8), and a ventilation pipe 2e communicating with the cavity 33 is connected thereto. The ventilation pipe 2e is connected to an intake / exhaust device (not shown). Thereby, air suction from the inside of the drilling drill 30 and blowing of air into the inside of the drilling drill 30 are possible.

  As shown in FIG. 7, the distal end portion 32 of the drilling drill 30 has a cylindrical shape with a C-shaped cross section. The distal end portion 32 is provided with a flat surface 34 and a notch portion 37, and a side surface of the notch portion 37 is a blade portion 38. The side surface 32a of the tip end portion 32 may be perpendicular to the flat surface 34 as shown in FIG. 7, and as shown in FIG. 8, the tapered surface is inclined toward the center as the flat surface 34 is approached. It may be. In the latter case, since the edge of the formed outside air introduction hole 15 becomes a tapered surface that expands outward, there is an advantage that the valve member 5 can be easily inserted.

  The width W in the radial direction of the flat surface 34 is preferably 0.1 to 0.2 mm, and more preferably 0.12 to 0.18 mm. If the width W is too small, the inner bag 14 is likely to be damaged during drilling, and if the width W is too large, the blade portion 38 is difficult to contact the outer shell 12, making it difficult to perform drilling smoothly. The range in which the notch 37 is provided is preferably 60 to 120 degrees, and more preferably 75 to 105 degrees. If this range is too large, the inner bag 14 is easily damaged during drilling, and if this range is too small, it is difficult to perform drilling smoothly. The angle α of the inclined surface P2 with respect to the circumscribed surface P1 in the blade portion 38 is preferably 30 to 65 degrees, and more preferably 40 to 55 degrees. If the angle α is too small, the inner bag 14 is liable to be damaged during drilling, and if the angle α is too large, it is difficult to perform drilling smoothly.

  Further, the inner surface 35 of the distal end portion 32 is provided with a tapered surface 36 that widens toward the distal end. As a result, the excision piece 15a (see FIG. 6C) generated at the time of drilling does not remain on the container main body 3 side, but easily shifts to the inner surface 35 side. The angle of the tapered surface 36 with respect to the flat surface 34 is preferably 95 to 110 degrees, and more preferably 95 to 105 degrees. In other words, as shown in FIG. 7E, the angle β of the tapered surface 36 with respect to the direction X parallel to the rotation axis of the drilling drill 30 is preferably 5 to 20 degrees, and more preferably 5 to 15 degrees. Further, a concave or V-shaped substantially annular groove 39 having a depth of 0.05 to 0.1 mm and a width of 0.1 to 0.2 mm is formed on the inner surface 35 in a direction perpendicular to the flat surface 34 (the drilling drill 30 It is preferable to apply at a pitch of 0.2 to 1 mm in the direction X) parallel to the rotation axis. In this case, the excision piece 15a further easily moves to the inner surface 35. The pitch of the grooves 39 is more preferably 0.3 to 0.7 mm. Further, the inner surface 35 is preferably subjected to a blasting process, so that the cut piece 15a is further easily transferred to the inner surface 35.

  Next, as shown in FIG. 6B, the flat surface 34 is pressed against the outer shell 12 while rotating the drilling drill 30. At this time, the flat surface 34 slightly sinks into the outer shell 12. As a result, the outer shell 12 partially enters the cutout portion 37, the blade portion 38 contacts the outer shell 12, and the outer shell 12 is cut. When the flat surface 34 reaches the boundary between the outer shell 12 and the inner bag 14, the outer shell 12 is cut out in a circular shape to form a round hole-shaped outside air introduction hole 15. At this time, by aspirating the air inside the drilling drill 30, the cut piece 15 a formed by hollowing out the outer shell 12 is sucked into the cavity 33 of the drilling drill 30.

  After the flat surface 34 reaches the boundary between the outer shell 12 and the inner bag 14, when the flat surface 34 is pressed against the inner bag 14, the inner bag 14 is peeled from the outer shell 12 toward the inside of the container body 3. Since it deform | transforms easily, the flat surface 34 does not dig into the inner bag 14, the blade part 38 does not contact the inner bag 14, and it is suppressed that the inner bag 14 is damaged.

  In this embodiment, the drilling drill 30 is used without being heated, and this has the advantage that the edge of the outside air introduction hole 15 is not melted and the edge is formed sharply. Moreover, in order to suppress the influence by the heat | fever which generate | occur | produces by the friction with the drill 30 and the outer shell 12, the drill 30 has a high thermal conductivity (example: 35 W / (m · ° C.) or higher at 20 ° C.) It is preferable to form by. In order to make drilling easier, the drill 30 may be heated. In this case, the melting point of the resin constituting the outermost layer of the inner bag 14 is preferably higher than the melting point of the resin constituting the innermost layer of the outer shell 12 so that the inner bag 14 is not melted by the heat of the drill 30. .

  In addition, when the hole 15 is made in the outer shell 12 from the outer space S side by the drilling drill 30, the burr Br is generated on the inner bag 14 side, that is, the intermediate space 21 side. As shown in FIGS. 10A, 10 </ b> B, and 11 </ b> A, the burr Br is formed to extend substantially perpendicular to the direction in which the drill 30 is inserted, that is, the outer shell 12. In FIG. 11 and the like, the burr Br is described in a straight line, but this is drawn for the sake of convenience in order to show the direction in which the burr Br is formed, and does not represent the actual shape. Actually, the burr Br is irregularly generated for each product. If the valve member 5 is attached to the outside air introduction hole 15 in such a state, the burr Br may interfere with the valve member 5 and the valve member 5 may not operate normally. The burr Br does not interfere with the valve member 5 by the (burr treatment step).

Next, as shown in FIG. 6C, the excavation device 15 is retreated in the direction of the arrow X <b> 2 and air is blown into the cavity 33 of the drilling drill 30, thereby releasing the excision piece 15 a from the tip of the drilling drill 30. .
Through the above steps, the formation of the outside air introduction hole 15 in the outer shell 12 is completed.

  Next, as shown in FIG. 6D, the inner bag 14 is preliminarily separated from the outer shell 12 by blowing air between the outer shell 12 and the inner bag 14 through the outer air introduction hole 15 using the blower 48. (Preliminary peeling step). Further, by blowing a specified amount of air while preventing air leakage through the outside air introduction hole 15, it is easy to control the preliminary peeling of the inner bag 14. Preliminary peeling may be performed on the entirety of the accommodating portion 7 or may be performed on a part of the accommodating portion 7. However, in a portion where the preliminary peeling is not performed, the inner bag 14 is checked for the presence or absence of pinholes. Since this is not possible, it is preferable that the inner bag 14 is preliminarily peeled from the outer shell 12 over substantially the entire housing portion 7. The air may be blown between the outer shell 12 and the inner bag 14 by another method. For example, air can be blown between the outer shell 12 and the inner bag 14 through an opening provided in the outer shell 12 in the upper cylindrical portion 41 shown in FIG.

  Next, as shown in FIG. 6 (e), hot air is applied to the bottom seal projection 27 to soften the thin portion 27 a, and the bottom seal projection 27 is bent.

  Next, as shown in FIGS. 9A and 9B, the insertion tool 42 is moved as shown by the arrow X <b> 1 direction to insert the insertion tool 42 from the outside air introduction hole 15. Then, the inner bag 14 is separated from the outer shell 12 by pushing the inner bag 14 into the container body 3 with the insertion tool 42 (inner bag separation step). According to this method, the inner bag 14 can be largely separated from the outer shell 12 locally. Following this, the insertion tool 42 is moved as indicated by the arrow X2 direction, and the expanded air portion 45 (see FIGS. 9A and 10) formed in the insertion tool 42 allows the outside air introduction hole 15 to be moved. The edge on the inner bag 14 side is pressed toward the outside in the radial direction of the outside air introduction hole 15 (pressing step, but hereinafter also referred to as a burr processing step). By this step, the burr Br formed at the edge of the outside air introduction hole 15 by the outside air introduction hole forming step can be processed so as not to interfere with the valve member 5. Hereinafter, the inner bag separation step and the pressing step (burr processing step) using the insertion tool 42 will be described in detail.

  As shown in FIG. 10, the insertion tool 42 includes a base end portion 43 held by a jig, a connection portion 44 that is continuous with the base end portion 43 and has a smaller diameter than the base end portion 43, and a connection portion 44. It is a rod-shaped member having a bulging portion 45 that is continuous and has the largest diameter, and a tip portion 46 that is continuous with the bulging portion 45 and has a rounded tip. Here, the distal end portion 46 (and the connection portion 44) has a diameter that can be inserted into the outside air introduction hole 15 without pushing the outside air introduction hole 15, and the diameter is substantially the same as the diameter of the outside air introduction hole 15. Or smaller than the diameter of the outside air introduction hole 15. The ratio of the diameter of the tip 46 to the diameter of the outside air introduction hole 15 is preferably 0.5 to 1.0, more preferably 0.6 to 0.8, and 0.70 to 0.75. More preferably. Specifically, the ratio of the diameters is 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0,. 95 and 1.0, and may be within a range between any two of the numerical values exemplified here. Moreover, it is preferable that the length from the place with the largest diameter of the enlarged diameter part 45 to the front-end | tip of the front-end | tip part 46 is sufficiently longer than the thickness of the outer shell 12, for example 10 times or more.

  Next, as shown in FIG. 11, the expanded diameter portion 45 has a gently tapered shape on both the distal end surface (referred to as the insertion surface 45a) and the proximal end surface (referred to as the pressing surface 45b). Are smoothly connected to the connecting portion 44 and the tip portion 46, respectively. The tapered insertion surface 45a and the pressing surface 45b referred to here are flat surfaces when the portion in contact with the outer shell 12 is viewed microscopically, and when viewed macroscopically, projecting outward. It may be arcuate. Further, the inclination of the insertion surface 45a is formed more gently than the inclination of the pressing surface 45b. When the inclination of the insertion surface 45a is made steep, the elastic energy is accumulated in the outer shell 12 by engaging the outer shell 12 when the insertion tool 42 is inserted, and the expanded diameter portion 45 passes through the outside air introduction hole 15. This is because a force in the X1 direction is applied to the insertion tool 42 and the abrupt movement in the X1 direction is suppressed.

  Further, the diameter of the thickest portion of the expanded diameter portion 45 is larger than the diameter of the outside air introduction hole 15, and the ratio of the diameter (thickest portion) of the expanded diameter portion 45 to the diameter of the outside air introduction hole 15 is 1 0.011 to 1.06 is preferable, 1.02 to 1.05 is more preferable, and 1.03 to 1.04 is even more preferable. The ratio of the diameters is specifically, for example, 1.01, 1.015, 1.02, 1.025, 1.03, 1.035, 1.04, 1.045, 1.05, 1.055 and 1.06, and may be within a range between any two of the numerical values exemplified here. If the diameter of the expanded diameter portion 45 is too small, the burr Br remains at a position where it interferes with the valve member 5, and if it is too large, the outside air introduction hole 15 will be deformed. In this way, these can be prevented.

  In the inner bag separation step, as shown in FIGS. 10A to 10C, the insertion tool 42 configured as described above is inserted into the outside air introduction hole 15 while being moved in the arrow X1 direction. As shown in FIG. 10B, the inner bag 14 is separated from the outer shell 12 in the vicinity of the outer air introduction hole 15. Here, the expanded diameter portion 45 has a diameter larger than the diameter of the outside air introduction hole 15, but the insertion surface 45a on the distal end portion 46 side of the expanded diameter portion 45 has a gentle taper shape. It can be smoothly inserted into the outer shell 12. Further, as shown by an imaginary line 12 a in FIG. 10C, the outer shell 12 is elastically deformed in the direction of the inner bag 14 at the edge of the outside air introduction hole 15, so that the expanded diameter portion 45 is in the outside air introduction hole 15. Can pass through.

  Since the inner bag 14 has a small restoring force, once it is in the state as shown in FIG. 10B, even if the insertion tool 42 is pulled out, it does not return to the state in FIG. Also, as shown in FIG. 10 (a), a gap G is formed between the outer shell 12 and the inner bag 14 by a preliminary peeling process. Therefore, when the insertion tool 42 is pressed against the inner bag 14, In addition to the load from the tool 42 being distributed over a wide range and transmitted to the inner bag 14, the inner bag 14 is easily deformed toward the inside of the container body 3, so that the inner bag 14 is damaged. There is no. However, depending on the material of the outer shell 12 and the inner bag 14, the inner bag 14 can be easily peeled from the outer shell 12. In such a case, the preliminary peeling step may be omitted and the inner bag separating step may be performed.

  Next, after inserting the insertion tool 42 into the outside air introduction hole 15 in the inner bag separation step, in the burr processing step, the insertion tool 42 is moved in the direction of the arrow X2, as shown in FIGS. 10 (c) to 10 (e). The burr Br formed at the edge of the outside air introduction hole 15 on the inner bag 14 side shown in FIG. 11A by pulling it out from the outside air introduction hole 15 while moving to the outside air as shown in FIG. It is inclined outward with respect to the introduction hole 15.

  Specifically, the insertion tool 42 is moved in the direction of the arrow X2, the pressing surface 45b of the expanded diameter portion 45 is brought into contact with the burr Br, and the insertion tool 42 is further moved in the direction of the arrow X2 in this state. The burr Br is pressed toward the outside in the radial direction of the outside air introduction hole 15. As a result, the burr Br is inclined in substantially the same direction as the inclination of the pressing surface 45b of the expanded diameter portion 45. Here, the angle formed between the pressing surface 45b of the expanded diameter portion 45 and the moving direction X2 is θ2 (see FIG. 11A), and the angle formed between the direction in which the burr Br is originally formed and the direction after the inclination by the pressing. Is θ3 (see FIG. 11B), θ2 and θ3 are substantially the same. Accordingly, the angle θ2 formed with the movement direction X2 of the pressing surface 45b of the expanded diameter portion 45, that is, the inclination angle θ2 of the pressing surface 45b of the expanded diameter portion 45, is a tapered surface 5d formed on the lid portion 5c of the valve member 5 ( By setting the inclination angle θ1 equal to or larger than θ1 in FIGS. 3B and 12B), the inclination angle θ3 of the burr Br is equal to or smaller than θ1 of the tapered surface 5d. Also grows. By having the burr Br of such a shape, it is possible to prevent the burr Br from interfering with the valve member 5 when the outside air introduction hole 15 is also fitted with the valve member 5 in the later-described valve member fitting step. Can do.

  In the burr processing step, after the pressing surface 45b of the expanded diameter portion 45 comes into contact with the burr Br, the pulling speed of the insertion tool 42 when the expanded diameter portion 45 passes through the outside air introduction hole 15 is the inner bag separation step. It is preferable to make it slower than the moving speed in other scenes, including when the expanded diameter portion 45 is inserted into the outside air introduction hole 15.

  Next, as shown in FIGS. 13A to 13B, the robot arm 47 is moved in the direction of the arrow X <b> 1 while the valve member 5 is attracted by the robot arm 47, and the valve member 5 is moved into the outside air introduction hole 15. By pushing in, the valve member 5 is mounted on the outer shell 12 (valve member mounting step). Specifically, from the outside of the outer shell 12, the lid 5 c of the valve member 5 is pushed into the outside air introduction hole 15 to be inserted therethrough, as shown in FIGS. 12 (a) and 13 (b). Is attached to the outer shell 12. Since the lid portion 5 c has a diameter larger than that of the outside air introduction hole 15, the lid portion 5 c passes through the outside air introduction hole 15 while expanding the outside air introduction hole 15. Then, immediately after the lid 5 c passes through the outside air introduction hole 15, the lid 5 c moves vigorously toward the inside of the container body 3. At this time, if the lid 5c collides with the inner bag 14, the inner bag 14 may be damaged. However, in the present embodiment, the inner bag 14 is separated from the outer shell 12 in advance in the inner bag separating step. The lid 5c hardly contacts or does not contact the inner bag 14, and the inner bag 14 is not damaged. On the other hand, when the inner bag 14 is adjacent to the outer shell 12 without performing the inner bag separation step, the lid 5c moves vigorously toward the inside of the container body 3 immediately after passing through the outside air introduction hole 15. Then, it collides with the inner bag 14 and damages the inner bag 14. Therefore, it is important to perform the inner bag separating step before the valve member mounting step. In the present embodiment, the valve member 5 is configured to open and close the outside air introduction hole 15 by opening and closing the gap between the edge of the outside air introduction hole 15 and the valve member 5 by the movement of the valve member 5. However, the valve member 5 itself may be provided with a through hole and a valve that can be opened and closed, and the outside air introduction hole 15 may be opened and closed by opening and closing the through hole by the action of this valve. Even when the valve member 5 having such a configuration is used, there is a problem that the inner bag 14 may be damaged when the valve member 5 is pushed into the outside air introduction hole 15 from the outside of the outer shell 12. Similarly to the present embodiment, the inner bag 14 can be prevented from being damaged by performing the preliminary peeling step and the inner bag separating step before the valve member mounting step.

Next, as shown in FIG.13 (c), the upper cylindrical part 41 is cut.
Next, as shown in FIG. 13D, the inner bag 14 is inflated by blowing air into the inner bag 14.
Next, as shown in FIG.13 (e), the inner bag 14 is filled with the contents.
Next, as shown in FIG. 13 (f), the cap 23 is attached to the mouth portion 9.
Next, as shown in FIG. 13G, the housing portion 7 is covered with a shrink film, and the product is completed.

  The order of the various steps shown here can be changed as appropriate. For example, the hot air bending step may be performed before the outside air introduction hole opening step or before the inner layer preliminary peeling step. Further, the step of cutting the upper tubular portion 41 may be performed before the valve member 5 is inserted into the outside air introduction hole 15.

Next, the principle of operation when using the manufactured product will be described.
As shown in FIGS. 14A to 14C, the product filled with the contents is tilted and the side surface of the outer shell 12 is gripped and compressed to discharge the contents. At the start of use, since there is substantially no gap between the inner bag 14 and the outer shell 12, the compressive force applied to the outer shell 12 directly becomes the compressive force of the inner bag 14, and the inner bag 14 is compressed. The contents are discharged.

  The cap 23 incorporates a check valve (not shown), and can discharge the contents in the inner bag 14, but cannot take outside air into the inner bag 14. Therefore, when the compressive force applied to the outer shell 12 after discharging the contents is removed, the outer shell 12 tries to return to its original shape by its own restoring force, but the inner bag 14 remains deflated and only the outer shell 12 remains. Will expand. Then, as shown in FIG. 14 (d), the inside of the intermediate space 21 between the inner bag 14 and the outer shell 12 is in a reduced pressure state, and outside air is introduced into the intermediate space 21 through the outside air introduction hole 15 formed in the outer shell 12. be introduced. When the intermediate space 21 is in a reduced pressure state, the lid 5c is not pressed against the outside air introduction hole 15, and thus does not hinder the introduction of outside air.

  Next, as shown in FIG. 14 (e), when the side surface of the outer shell 12 is gripped and compressed again, the lid 5 c closes the outside air introduction hole 15, thereby increasing the pressure in the intermediate space 21. The compressive force applied to the outer shell 12 is transmitted to the inner bag 14 through the intermediate space 21, and the inner bag 14 is compressed by this force and the contents are discharged.

  Next, as shown in FIG. 14 (f), when the compressive force applied to the outer shell 12 after discharging the contents is removed, the outer shell 12 introduces outside air from the outside air introduction hole 15 into the intermediate space 21. It is restored to its original shape by its own restoring force.

In addition, this invention can be implemented also with the following aspects.
-In embodiment mentioned above, the edge part by the side of the inner bag 14 of the external air introduction hole 15 is pressed outside with the insertion tool 42 which has the enlarged diameter part 45 larger in diameter than the external air introduction hole 15, and burr | flash Br is carried out. Although it is configured to expand, as shown in FIG. 15, it is possible to process the burr Br using the insertion tool 42 that does not have the expanded diameter portion 45. Specifically, a rotating body is attached to the insertion tool 42, and after the preliminary peeling process of FIGS. 15A and 15B, the insertion tool 42 is inserted into the outside air introduction hole 15 as shown in FIG. Is rotated so that the tip of the insertion tool 42 forms a circle having a diameter larger than the diameter of the outside air introduction hole 15, so that the side surface of the insertion tool 42 faces the edge of the outside air introduction hole 15 on the inner bag 14 side outside. The burr Br can be expanded.
In the above-described embodiment, the inner bag separation step and the burr processing step are performed by a series of operations using the same insertion tool 42, but the inner bag separation step and the burr processing step are performed at different timings. It is also possible to use another device. If there is no possibility that the inner bag 14 is damaged when the valve member 5 is inserted, it is possible to omit the inner bag separating step and perform only the burr processing step.

DESCRIPTION OF SYMBOLS 1 Lamination peeling container 3 Container main body 5 Valve member 5a Shaft part 5c Cover part 7 Storage part 9 Portion part 11 Outer layer 12 Outer shell 13 Inner layer 14 Inner bag 15 Outer air introduction hole 21 Intermediate space 42 Insertion tool 45 Expanded diameter part 45a Insertion surface 45b Pressing surface 46 Tip Br Burr θ1 to θ3 Inclination angle

Claims (7)

A container body forming step for forming a container body having an outer shell and an inner bag;
An outside air introduction hole forming step of forming an outside air introduction hole penetrating only the outer shell in the container portion of the container body for containing the contents;
A pressing step for pressing the inner bag side edge of the outside air introduction hole;
A method for manufacturing a delamination container, comprising a valve member mounting step of mounting a valve member capable of opening and closing the outside air introduction hole on the outer shell.   2. The method according to claim 1, wherein, in the pressing step, an edge portion of the outside air introduction hole on the inner bag side is pressed by an insertion tool inserted into the outside air introduction hole.   The method according to claim 2, wherein the insertion tool has an expanded diameter portion having a larger diameter than the outside air introduction hole, and the edge portion is pressed by inserting the expanded diameter portion into the outside air introduction hole. .   The insertion tool has a distal end portion having a diameter smaller than that of the expanded diameter portion on the distal end side of the expanded diameter portion, and the expanded diameter portion is pushed by pushing the inner bag into the container body by the distal end portion. The method according to claim 3, wherein the inner bag is separated from the outer shell before being inserted into the outside air introduction hole.   The distal end side and the proximal end side of the expanded diameter portion are each formed in a taper shape, and the inclination on the proximal end side of the expanded diameter portion is formed more gently than the inclination on the distal end side of the expanded diameter portion. Or the method according to claim 4. A container main body having an outer shell and an inner bag and shrinking from the outer shell as the contents are reduced, and a valve member capable of opening and closing an outside air introduction hole penetrating only the outer shell. A delamination container,
The valve member includes a shaft portion that is inserted into the outside air introduction hole and is slidable with respect to the outside air introduction hole, and a lid that is provided on the inner bag side of the shaft portion and has a larger cross-sectional area than the shaft portion. Department and
A delamination container in which burrs formed at an edge of the outside air introduction hole on the inner bag side are inclined outward with respect to the outside air introduction hole.   The lid portion has an inclined surface that is inclined toward the shaft portion side and abuts against an edge portion of the outside air introduction hole on the inner bag side, and an inclination angle of the burr is an inclination of the inclined surface. The delamination container according to claim 6, wherein the delamination container is formed so as to be substantially the same as a corner or larger than an inclination angle of the inclined surface.