JP6055624B2 - Double aerosol container and method for producing double aerosol container - Google Patents

Description

  The present invention relates to a method for manufacturing a double aerosol container and a double aerosol container. More specifically, the present invention relates to a double aerosol container that uses a small outer diameter valve to reduce costs, and a metal container having a small diameter mouth portion. It is related with the manufacturing method of the double aerosol container which can insert an inner bag smoothly without damage inside.

(1) The valve | bulb 52 with which the outer diameter was large was used for the valve | bulb 52 with which the metal container 50 of the conventional double aerosol container was mounted | worn. As shown in FIG. 7, Y / X × 100> 65% is generally between the outer diameter X of the metal container 50 and the outer diameter Y of the valve 52 inserted into the mouth portion 51.
(2) Conventionally, the step of inserting the inner bag 53 into the metal container 50 has been performed manually, or the inner bag 53 into which the insertion rod has been inserted is squeezed by the tapered portion of the inner bag insertion device. However, it was performed by the method of inserting in a metal container. Related prior art documents include Patent Document 1 and Patent Document 2.

Patent No. 4648501 Japanese Patent No. 4773590

However, the conventional methods have the following drawbacks.
(1) Conventionally, since the outer diameter of the valve 52 attached to the mouth portion 51 of the metal container 50 is large, there is a drawback that the manufacturing cost of the double aerosol container as a whole increases. This is because the cost of the double aerosol container greatly depends on the price of the valve 52.
(2) Conventionally, when the inner bag 53 is inserted into the metal container 50, the inner bag 53 is inserted into the metal container 50 with an insertion rod, but the inner bag 53 is smaller than the inner diameter of the mouth 51 of the metal container 50. When the outer diameter of the inner bag is large, it is difficult to insert, and the inner bag 53 is subjected to an excessive force and cannot be smoothly inserted, so that the inner bag is damaged.
Therefore, the inner bag 53 has been inserted through the tapered portion of the inner bag insertion device. However, when the inner diameter of the mouth 51 of the metal container 50 is narrow and the outer diameter of the inner bag 53 is large. It was difficult to insert the inner bag. This is because the inner bag 53 was inserted without determining setting conditions such as the shape of the bottom of the inner bag 53 and the inner diameter and inclination angle of the tapered portion that squeezes the inner bag 53.
The present invention has been made paying attention to such a conventional problem. In a double aerosol container, a small outer diameter valve is used to reduce the cost of the double aerosol container and When inserting the inner bag through the tapered portion, by finding an insertion condition that allows the inner bag to be easily inserted into a metal container having a small-diameter mouth portion, the inner bag can be smoothly inserted without damaging the inner bag. It aims at providing the manufacturing method of a heavy aerosol container and a double aerosol container.

  In order to solve this problem, the solution means of the invention according to claim 1 is a metal container having a body part, a mouth part and a shoulder part having a diameter reduced from the body part, and an inner bag inserted into the metal container. A double aerosol container in which a propellant is present between the metal container and the inner bag, between a body outer diameter A of the metal container and an outer diameter B of the valve inserted into the mouth And B / A × 100 ≦ 65% is satisfied.

  According to a second aspect of the present invention, there is provided a means for solving the problem through an inner bag guiding device having a tapered portion inclined so as to reduce the diameter of the body portion of the inner bag toward the traveling direction of the inner bag into which the insertion rod is inserted. A method for producing a double aerosol container comprising the step of inserting an inner bag into a metal container while shrinking the outer diameter of the body portion of the inner bag.

  According to a third aspect of the present invention, in the case where the barrel portion of the inner bag is contracted by the tapered portion, the outer diameter E of the barrel portion of the inner bag and the inner diameter C of the mouth portion of the metal container, 55. <= C / E * 100 <= 75% is materialized, The manufacturing method of the double aerosol container of Claim 2 characterized by the above-mentioned.

  According to a fourth aspect of the present invention, an inclined portion is formed at the tip of the body portion of the inner bag, and an angle θ with respect to the central portion of the inclined portion and the inner bag is 12.5 ° ≦ θ ≦ 25 °. And the inner angle α of the tapered portion of the inner bag guiding device is formed such that 30 ° ≦ α ≦ 50 °.

  According to the double aerosol container according to the present invention, the cost can be reduced by using a small outer diameter valve whose price is low. Moreover, it has the effect that it can insert smoothly in a metal container, without damaging an inner bag in a metal container which has a small diameter opening part.

Drawing which shows Example 1 of the double aerosol container which concerns on this invention. Drawing which shows Example 2 of the double aerosol container which concerns on this invention. The drawing which shows Example 3 which shows the inner bag insertion method which is the manufacturing method of the double aerosol container which concerns on this invention, and the inner bag guidance | induction apparatus which is an apparatus. Drawing which shows Example 4 which shows the inner bag insertion method which is the manufacturing method of the double aerosol container which concerns on this invention, and the inner bag guidance | induction apparatus which is an apparatus. Sectional drawing which shows the outer aerosol type double aerosol container which concerns on this invention. Sectional drawing which shows the inner container type aerosol container which concerns on this invention. Sectional surface which shows the conventional double aerosol container.

Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.
The metal containers 8, 18, and 38 shown in Examples 1 to 6 are manufactured by the following method. First, a cylindrical seamless one-piece container having bottom portions 10 and 20 is made by a method of impact extrusion of slag such as pure aluminum or aluminum alloy or a method of drawing and ironing a sheet of aluminum alloy or steel. It is done. Next, after undergoing a chemical conversion treatment / cleaning process for the inner and outer surfaces of the container, a coating process for the inner surface of the container, a printing process for the outer surface of the container, and the like, the opening of the bottomed cylindrical container is subjected to necking multiple times. The diameter of the opening is reduced, and a frustoconical shoulder and mouths 9, 19, 39 are formed. Grooves 9a and 39a are formed in the mouth by roll processing or the like.

In the inner surface coating process, a paint such as a polyamide-imide resin, an epoxy phenol resin, or a fluorine resin such as polyvinylidene fluoride resin or tetrafluoroethylene copolymer resin (ETFE) is applied by spray coating or the like. It is baked.
Further, as shown in FIG. 4, a trumpet-shaped portion may be formed at the tip portion of the opening by slightly expanding the diameter thereof, and the inner bag is smoothly smoothed in the container by the trumpet-shaped portion. Can be inserted into.
Further, a burr is generated at the front end portion of the opening due to trimming processing for aligning the height of the container, and this burr may damage the inner bag when the inner bag is inserted. Therefore, it is preferable to perform processing to remove burrs.
Finally, since the lubricant is generally used in opening processing such as necking, roll processing, and trimming, the lubricant is removed by the cleaning process, and the metal container is completed.

Next, the inner bag 1,11,31 shown in Examples 1-6 has a funnel-shaped mouth part 2 and a body part 4 formed through a constricted part 3, and at the tip of the body part 4, Bottom portions 5 and 15 having inclined portions 5a and 15a are formed. Such a shape is integrally formed by blow molding or the like.
Materials constituting the inner bag are polyolefin resins such as polyethylene (PE), polypropylene (PP) and cyclic olefin copolymer (COC), polyester resins such as polyethylene terephthalate (PET), ethylene vinyl alcohol copolymer (EVOH) Or a gas barrier resin such as polyamide (PA) may be used, and only one layer may be used, or a laminate of two or more layers may be used. As a single layer structure of only one layer, there is a single layer structure such as low density polyethylene (LDPE), linear low density polyethylene (LLDPE), etc., and as a multilayer structure of two or more layers, from the inner layer side toward the outer layer side, Metallocene linear low density polyethylene / low density polyethylene, low density polyethylene or linear low density polyethylene / modified polyethylene / ethylene vinyl alcohol copolymer / modified polyethylene / low density polyethylene or linear low density polyethylene, ethylene vinyl There are multilayer structures such as alcohol copolymer / modified polyethylene / low density polyethylene or linear low density polyethylene. The thickness of such an inner bag is usually 0.2 to 0.8 mm.

The inner bag thus produced is inserted into the metal container by the method of Example 3 (FIG. 3) described later, and the state after the insertion is shown in Example 1 (FIG. 1) or Example 2 (FIG. 2). ). The contents filled in the inner bag are usually filled in the state of FIG. 1 or FIG. 2, but as in Example 4 (FIG. 5) and Example 5 (FIG. 6) described later, the valve 6, After 36 is crimped to the metal containers 8 and 38, it may be filled via the stems 6b and 36b.
Next, the valves 6 and 16 are attached to the mouth portions of the inner bags 1 and 11, and the propellant is placed inside the mouth portions 9 and 19 of the metal container and outside the mouth portion 2 of the inner bag by an undercup filling method. The outer space of the inner bag in the metal container is filled from the gap (not shown). In FIG. 1, this gap is formed when the inner bag 1 is inserted into the metal container 8. On the other hand, when the inner bag 11 shown in FIG. 2 is inserted into the metal container 18, the mouth portion of the inner bag is in contact with and suspended from the mouth portion 19 of the metal container. Clear gaps are not formed. Therefore, by slightly lifting the inner bag, a gap is formed as shown in FIG.

Immediately after filling with the propellant, the inner bags 1 and 11 are pushed down into the metal containers 8 and 18. The mouth portion of the inner bag and the valves 6 and 16 are pressed against the inner surfaces of the mouth portions 9 and 19 of the metal container and the groove portion 9a, and the mouth portions 9 and 19 of the metal container are sealed by the valves 6 and 16. Here, since the mouth part 2 of the inner bag protrudes from the mouth part 9 of the metal container 8, the inner bag 1 shown in FIG. Is adjusted.
Finally, the valves 6, 16, and 36 are caulked to the mouth portions 9 of the metal containers 8, 18, and 38 by the method of Example 4 (FIG. 5) and Example 5 (FIG. 6) to be described later. Is completed.

The double aerosol container thus manufactured has a metal container body outer diameter A of 15 to 45 mm, preferably 20 to 35 mm. The outer diameter of the body portion of the inner bag is set to a size slightly smaller than the outer diameter A of the body portion of the metal container in consideration of the accommodation space for the propellant. The outer diameter B of the valve is preferably 20 mm or less, which is smaller than the conventional outer diameter of 28 mm, from the viewpoint of cost reduction. Corresponding to the outer diameter B of the valve, the inner diameter C of the mouth of the metal container is formed to be less than 20 mm. However, if the inner diameter C of the mouth is small, the insertion resistance of the inner bag increases and the inner bag is damaged. It becomes easy. Therefore, it is preferable that the outer diameter A of the body portion of the metal container is 45 mm or less.
As described above, the double aerosol container of the present invention lacks the capacity of the contents by the amount that the outer diameter B of the valve, the inner diameter C of the mouth portion of the metal container, and the outer diameter A of the trunk portion are smaller than the conventional container. . Therefore, the capacity | capacitance of the content is ensured by making the height H of a metal container into the range of 70-200 mm higher than the conventional container. However, if the outer diameter A of the body is less than 15 mm, the capacity of the contents is remarkably reduced, which is not practical.

  FIG. 1 is a drawing showing Example 1 of a double aerosol container according to the present invention, in which a double aerosol container of a type in which a bottom part 5 of an inner bag 1 is placed on a bottom part 10 of a metal container 8 is illustrated. ing. For example, the outer diameter A of the body of the metal container 8 is 35 mm, and the outer diameter B of the bulb 6 is 17 mm. In this case, B / A × 100 = 48.6%. The angle θ of the inclined portion 5a of the bottom 5 with respect to the central axis of the inner bag is formed so that 12.5 ° ≦ θ ≦ 25 °. Furthermore, the inner diameter C of the mouth portion 9 of the metal container 8 is 14.9 mm, and the length H of the metal container is 100 mm ≦ H ≦ 168 mm. In Example 1, for example, when a valve with an outer diameter of 17 mmφ is used, it is manufactured 6 to 7 yen cheaper per double aerosol container than when a conventional valve with an outer diameter of 28 mmφ is used. Can do.

  Next, FIG. 2 is a drawing showing Example 2 of the double aerosol container according to the present invention, and shows a double aerosol container of a type in which the bottom 15 of the inner bag 11 does not contact the bottom 20 of the aerosol container 18. Has been. The outer diameter of the body of the metal container 18, the outer diameter of the valve 16, the angle of the inclined portion 5a of the bottom 5 with respect to the central axis of the inner bag, the inner diameter of the mouth 19 of the metal container 18, and the length of the metal container are examples. The same dimensions as 1. Similarly, in Example 2, for example, when a valve having an outer diameter of 17 mmφ is used, it is 6 to 7 yen per double aerosol container as compared with the case of using a conventional valve having an outer diameter of 28 mmφ. It can be manufactured cheaply.

  FIG. 3 is a view showing a method and an apparatus for manufacturing a double aerosol container showing Example 3 of the present invention. Specifically, FIG. 3 is a view showing a state in which the inner bag 1 is inserted into the metal container 8. is there. In the third embodiment, the inner bag 1 is inserted into the metal container 8 from the mouth 9 of the metal container 8 by, for example, an insertion rod 21 that reciprocates by a cam mechanism (not shown). The At this time, the inner bag 1 is contracted and inserted via the inner bag guiding device 22. That is, the inner bag 1 is inserted by the insertion rod 21 from the mouth 9 of the metal container 8 through the tapered portion 23 of the inner bag guiding device 22. The inner angle α of the tapered portion 23 of the inner bag guiding device 22 is formed as 30 ° ≦ α ≦ 50 ° as shown in FIG. 4, while the bottom portion 5 of the inner bag 1 takes into account the resistance during insertion, An inclined portion 5a having an angle θ of 12.5 ° ≦ θ ≦ 25 ° with respect to the central axis of the inner bag is formed.

  The outer diameter of the insertion rod 21 is 4 to 10 mm, and can be appropriately changed according to the outer diameter of the inner bag 1. Incidentally, when the outer diameter of the inner bag 1 is 24.7 mm, the outer diameter of the insertion rod 21 is suitably 6 mm. Furthermore, the distance F between the inner bag guiding device 22 and the mouth portion 9 of the metal container can be 3 to 3 as a distance that can accurately push the bottom 5 and can insert the inner bag 1 accurately from the center of the inner bag. 7 mm is suitable and 5 mm is more preferred. In the present invention, due to the synergistic effect of these numerical values, the inner bag 1 is smoothly inserted into the metal container 8 through the tapered portion 23 of the guide device 22 without being damaged without resistance. As shown in FIG. 4, the insertion condition of the tapered portion 23 in this case is as follows: [the inner diameter C of the mouth portion of the metal container (≈the inner diameter of the outlet of the inner bag guiding device) / the outer diameter E × 100 of the inner bag] ≦ C / E × 100 ≦ 75%. Under this condition, the inner bag 1 is reasonably contracted and smoothly inserted into the metal container 8 from the mouth portion 9 of the metal container 8 via the guide device 22. The inventor has found these conditions. As a specific example, A = 35 mm, B = 17 mm, C = 14.9 mm, E = 24.7 mm, F = 5 mm, 100 mm ≦ H ≦ 168 mm. In the double aerosol container according to the present invention, the inner diameter C of the mouth portion 9 of the metal container 8 is made small in order to fix the small valve 6, so that the inner bag 1 is damaged under the conventional normal insertion conditions. However, according to the insertion condition of the present invention, it can be inserted smoothly and without damage.

Further, a fold-like crease may be formed in the lower portion of the tie portion 3 of the inner bag, and the trunk portion of the inner bag can be easily contracted by this fold.
Furthermore, the inner bag can be formed by adding a lubricant to the synthetic resin used for the inner bag. This lubricant can reduce the frictional resistance when the inner bag is inserted. In the case of two or more inner bags, the same effect can be obtained by adding a lubricant to the outermost layer. Usable lubricants include fatty acid amides such as erucic acid amide and stearic acid amide, stearic acid monoglyceride, stearyl stearate, esters such as hardened castor oil, hydrocarbons such as liquid paraffin and polyethylene wax, and higher grades such as stearyl alcohol There are alcohol soaps and metal soaps such as zinc stearate.

  FIG. 5 is an example of a double aerosol container manufactured by the method for manufacturing a double aerosol container according to the present invention (hereinafter referred to as “outer swallow type double aerosol container”). The valve 6 used for the outer swallow type double aerosol container includes a packing 6a placed on the upper surface of the housing, a stem 6b biased by a spring, and a cup-shaped upper lid 7. After the valve 6 is mounted on the mouth of the inner bag 1, the propellant is filled in the outer space of the inner bag 1 in the metal container 8. When the inner bag is pushed down into the metal container, the mouth portion of the inner bag and the valve 6 are pressed against the inner surface of the mouth portion 9 of the metal container and the groove portion 9a, and the mouth portion 9 of the metal container is sealed by the valve 6. The Thereafter, the tip 7 a of the upper lid 7 is caulked from the outside into the groove 9 a of the metal container 8. By this caulking, the valve 6 is securely fixed to the mouth portion 9 and the mouth portion 9 of the metal container 8 is sealed. Then, the inner bag 1 is filled with contents such as a hair dye from the stem 6 b of the valve 6.

  FIG. 6 is an example of a double aerosol container manufactured by the method for manufacturing a double aerosol container according to the present invention (hereinafter referred to as “inner swallow type double aerosol container”). The valve 36 used in the inner double aerosol container includes a packing 36a and a top plate 36c that are placed on the upper surface of the housing, and a stem 36b that is biased by a spring. After the valve 36 is attached to the mouth of the inner bag 31, the propellant is filled in the outer space of the inner bag 31 in the metal container 38. When the inner bag is pushed down into the metal container, the mouth part of the inner bag and the valve 36 are pressed against the inner surface of the mouth part 39 and the groove 39a of the metal container, and the mouth part 39 of the metal container is sealed by the valve 36. The Thereafter, the distal end portion of the mouth portion 39 is bent inward on the top plate 36 c of the bulb 36 and crimped. By this caulking, the valve 36 is securely fixed to the mouth portion 39 and the mouth portion 39 of the metal container 38 is sealed. Then, the inner bag 31 is filled with contents such as a hair dye from the stem 36 b of the valve 36.

In the case where two outer-floor type double aerosol containers or two inner-floor type double aerosol containers manufactured by the method for manufacturing a double aerosol container according to the present invention are connected by a combination cover member (not shown), It can be implemented as a double aerosol container. For example, a double aerosol container filled with one hair dye can be used as a first container, and a double aerosol container filled with two hair dyes can be used as a second container. Two valve stems are respectively fitted to the cover member, and when the push button of the cover member is pressed, the first container and the hair dye 1 and the hair dye 2 in the second container are discharged from the cover member. Are simultaneously discharged in a mixed state.
The metal container of this embodiment preferably has a barrel outer diameter of 35 mm or less in consideration of ease of gripping.

  The double aerosol container according to the present invention can be widely used as an aerosol container for storing medicines, cosmetics, foods, adhesives and the like.

1, 11, 31 Inner bag 4 Body portion 5, 15 Bottom portion 5a, 15a Inclined portion 6 Valve 8, 18, 38 Metal container 9, 19, 39 Mouth portion 21 Insertion rod 22 Inner bag guiding device 23 Tapered portion

Claims (3)

Toward the traveling direction of the inner bag by inserting the insertion rod, through the inner bag guiding device having a tapered portion that is inclined so as to shrink the body of the inner bag, to contract the outer diameter of the body portion of the inner bag while, and have a step of inserting the inner bag into the metal container,
The body portion outer diameter A of the metal container is 20 to 35 mm,
The body bag outer diameter E of the inner bag is smaller than the body outer diameter A of the metal container,
The outer diameter of the valve attached to the mouth of the metal container is 20 mm or less, and the inner diameter C of the mouth is less than 20 mm,
At the front end of the body portion of the inner bag, a bottom portion formed of a flat portion having a diameter smaller than the outlet inner diameter of the inner bag guiding device and an inclined portion extending from the periphery thereof is formed.
The outer diameter of the insertion rod is substantially the same as the diameter of the flat portion of the inner bag, and the tip surface is flattened,
An angle θ with respect to the inclined portion and the central axis of the inner bag is formed so that 12.5 ° ≦ θ ≦ 25 °,
The method for producing a double aerosol container, wherein an inner angle α of the tapered portion of the inner bag guiding device is formed to be 30 ° ≦ α ≦ 50 ° . The method for producing a double aerosol container according to claim 1, wherein the outer diameter of the insertion rod is 4 to 10 mm. In the case of contracting the body of the inner bag by the tapered portion, and the outer diameter E of the body portion of the inner bag, 5 5% ≦ C / E × 100 ≦ between the mouth portion inner diameter C of the metal container 75 method for producing a dual aerosol container according to claim 1, wherein the% is characterized in that hold.

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