JP2005289478A - Method for manufacturing double aerosol container and double aerosol container - Google Patents

Abstract

A method of manufacturing a double aerosol container and a double aerosol container in which deformation of a neck portion and a flange portion are prevented when an inner cylinder is inserted into a container body.
In a method for manufacturing a double aerosol container, an insertion rod is inserted into an inner cylinder, and the inner cylinder is inserted into the container body while the outer diameter of the inner cylinder is reduced with a funnel-shaped drawing mold. In order to prevent the neck portion and the flange portion from being deformed when the body is inserted, an inner cylinder body having a long neck portion and a plurality of convex portions around the neck portion is inserted into the container body.
[Selection] Figure 4

Description

  The present invention relates to a double aerosol container, and more particularly, to a method for manufacturing a double aerosol container and a double aerosol container in which deformation of a neck and a flange is prevented when an inner cylinder is inserted into a container body.

Conventionally, in a method for manufacturing a double aerosol container, drawings showing a manufacturing process for inserting an inner cylinder into a container body include those shown in FIGS. 5 and 6. In FIG. 5, an inner cylinder 51 filled with contents is inserted into the container body 50, and a propellant that presses the inner cylinder 51 is filled between the container body 50 and the inner cylinder 51. ing. Some propellants are filled from the hole in the bottom of the container body 50 (Patent Document 1), or some are filled from the gap between the bead portion 52 of the container body 50 and the neck portion 51a of the inner cylinder body 51 (patent). Reference 2). In such a double aerosol container, when the inner cylinder 51 is inserted into the container main body 50, the inner cylinder 51 is formed in a tapered shape of a funnel-shaped drawing die 53 as shown in FIG. When the insertion hole 57 is pressed and passed through the throttle hole 54, it is reduced and deformed so as to be substantially equal to the inner diameter of the bead portion 52 of the container body 50. The inner cylinder 51 suspended from the container body 50 is filled with contents such as a drug hair dye, and a mounting cup 59 having a valve 55 is clinched to the bead portion 52 of the container body 50, Complete the assembly work.

Japanese Utility Model Publication No. 6-6275 Japanese Utility Model Publication No. 58-3482

  However, in such a conventional insertion method, when the insertion rod 57 is inserted into the inner cylinder 51 and the inner cylinder 51 is pressed, the body 51b is reduced and deformed as shown in FIG. Accordingly, the neck portion 51a and the flange portion 51c are also affected, and the neck portion 51a and the flange portion 51c are also deformed so that a perfect circle cannot be held. Since the flange portion 51c is placed on the bead portion 52 in a shifted state or a bent state, the flange portion 51c cannot function as a packing for the flange portion 51c. There was a problem of leakage. Further, when the packing 56 is attached to the lower side of the flange portion 51a in the insertion process of the inner cylinder body 51, the packing 56 is connected to the flange in the insertion process of the inner cylinder body 51 due to deformation of the neck portion 51a and the flange portion 51c. There is a drawback that a defective double aerosol container is produced in which the packing 56 does not exist between the bead part 52 and the flange part 51c because it is detached from the part 51c. The packing 56 has a function of preventing the propellant from leaking through a flaw generated on the top surface of the bead portion 52 in an aerosol container having a large outer diameter of the container body 50 of 40% or more. The mounting of the packing 56 is extremely important. The present invention has been made paying attention to such a conventional problem, and in the process of inserting the inner cylindrical body into the container main body, by preventing deformation of the neck portion and the flange portion, the flange portion is in an appropriate state. And a method for producing a double aerosol container for the purpose of being placed at an accurate position on the bead part or for preventing the packing from coming off from the neck part of the inner cylinder in the insertion step and A heavy aerosol container is provided.

  According to a first aspect of the present invention, a double aerosol container is manufactured by inserting an insertion rod into an inner cylinder and inserting the inner cylinder into the container body while reducing the outer diameter of the inner cylinder with a funnel-shaped drawing mold. In the method, in order to prevent the neck portion and the flange portion from being deformed when the inner cylinder body is inserted, the neck body is formed to have a long dimension and a plurality of convex portions are formed around the neck portion. It is the manufacturing method of the double aerosol container characterized by inserting in. As described above, since the neck portion of the container main body is formed to have a long dimension and a convex portion is formed around the neck portion, it is formed into a funnel-shaped tapered taper shape while pressing the body portion of the inner cylinder with an insertion rod. When the body portion is squeezed by passing through the narrowed hole, the neck portion is lengthened and reinforced, so that deformation of the body portion is not transmitted to the neck portion and the flange portion. That is, since the neck portion and the flange portion are not deformed, a perfect circle is held. Therefore, it can prevent that the flange part of an inner cylinder is mounted in the state shifted | deviated on the bead part, or mounted in the broken state. Therefore, the leakage of the contents and the propellant from between the bead portion and the mounting cup is prevented in advance.

According to a second aspect of the present invention, there is provided a method for producing a double aerosol container, wherein a packing is interposed between the flange portion of the inner cylinder and the convex portion of the inner cylinder. Similarly, it is possible to prevent the neck portion and the flange portion from being deformed, so that it is possible to prevent the defective double aerosol container without the packing from being produced due to the packing falling off from the flange portion in the packing mounting operation. it can. Therefore, the top surface ridge formed in the bead portion of the container body having a large outer diameter can be reliably closed with the packing. Accordingly, similarly, the leakage of the contents and the propellant from between the bead portion and the mounting cup is prevented in advance.

  The means of the invention described in claim 3 is a double aerosol container manufactured by the method described above. In the insertion step, the flange portion of the inner cylinder body can be placed at a predetermined position of the bead portion of the container body, or the inner cylinder body having a bent flange portion can be prevented from being placed on the bead portion, In a double aerosol container with a packing attached to the lower side of the flange part, the packing and the propellant leak to the outside because the packing is securely held between the flange part and the convex part of the inner cylinder. A double aerosol container can be provided.

According to the manufacturing method according to the present invention, in the step of inserting the inner cylinder into the container body, the neck and the flange of the inner cylinder are placed in a state of being displaced or bent in the bead part. Can be prevented in advance. In addition, when the packing is mounted, there is an effect of preventing the production of a defective double aerosol container in which the packing is not mounted due to the packing falling off from the flange portion in the mounting operation process. And it has the effect which can provide the double aerosol container by which the leakage of the contents and the propellant was prevented.

In the manufacturing process of the double aerosol container, the purpose of preventing the neck portion and the flange portion of the inner cylinder body from being deformed is to form the neck portion longer and to form the convex portion around the neck portion of the inner cylinder body. Realized by synergy.

FIG. 1 is a cross-sectional view showing a state in which the inner cylinder 2 is inserted into the container body 1. The inner cylinder 2 is composed of a single layer such as polyethylene resin, polypropylene resin or nylon resin, or a multilayer of these resins and a gas barrier resin such as ethylene-vinyl alcohol copolymer resin. The outer characteristic of the inner cylinder 2 is that the neck 3 is formed long and a plurality of convex portions 5 (four in the first embodiment) are formed around the neck 3 of the inner cylinder 2. There is in point. 1 and 2, the dimension α of the neck 3 is formed to be 8% or more of the dimension β of the inner cylinder 2. For example, if the inner cylinder 2 has an outer diameter of 51 mmφ, β of the inner cylinder 2 is 119 mm and α of the neck is 16 mm. The body 2a has a plurality of folds 2b formed on the entire surface. If the plurality of folds 2b are not formed, the body portion 2a does not shrink or deform. Therefore, when the insertion rod 9 is used for insertion, the insertion resistance in the bead portion 6 is large, and the inner cylinder 2 can be smoothly inserted into the container body 1. There is a drawback that it cannot be inserted inside. When the inner cylinder 2 is forcibly inserted, there is a problem that the neck 3 and the flange 4 of the inner cylinder 2 are cracked.

When inserting the inner cylinder 2, since it inserts in the container main body 1 in the state which this crease | fold 2b was folded and the outer diameter contracted, there exists an advantage which is easy to insert in the container main body 1. The inner cylinder 2 is filled with contents such as a medicine and a hair dye, and when the contents are filled, the plurality of fold lines 2b expand in the lateral direction. That is, the bottom portion 2 c of the trunk portion 2 a is pressed by the insertion rod 9 into the narrowed hole 10 formed in the tapered shape of the funnel-shaped narrowing die 20 to pass through the inner cylindrical body 2. At that time, the plurality of creases 2b on the surface of the body portion 2a are contracted and deformed to a diameter substantially equal to the inner diameter of the bead portion 6 of the container body 1 in a folded state. The inner cylinder 2 is inserted into the container body 1 by the pressing force of the insertion rod 9. Thereafter, the mounting cup 8 having the valve 7 is clinched to the bead portion 6 to complete the assembling work. When the contents are filled in the inner cylinder 2, the outer diameter of the body 2 a of the inner cylinder 2 approximates the inner diameter of the container body 1. Therefore, as shown in FIG. 1, the inner cylindrical body 2 can be filled with a sufficient volume of content approximately approximate to the volume of the container body 1.

The container body 1 into which the inner cylindrical body 2 is inserted is made of a metal such as aluminum or steel, and the body and the bottom are integrally formed by impact processing or the like. As another method, the body portion and the bottom portion may be wound. 1 and 2 show that the body and the bottom are integrally formed by impact molding or the like, and then the opening is necked and narrowed to be smaller than the outer diameter, and then the tip of the opening is beaded. It is the container main body 1 in which the bead part 6 was formed.

2 and 3 are drawings showing Embodiment 2 of the present invention. The second embodiment is characterized in that a packing 19 is interposed between the flange portion 14 of the inner cylindrical body 12 and the convex portion 15. The manufacturing method of the aerosol container shown in Example 2 is suitable for the case of the container body 11 having a large outer diameter. That is, in the necking process, since a large number of wrinkles are formed in the vertical direction from the inner peripheral surface of the container body 11 to the top surface of the bead portion 16, the drawback is that the propellant leaks by conducting the wrinkles. There is. In order to prevent such leakage, in the container body 11 having a large outer diameter, it is essential to interpose the packing 19 below the flange portion 14 of the inner cylindrical body 12. Therefore, as shown in FIG. 2, the neck portion 13 is formed long and a plurality of convex portions 15 are formed around the neck portion 13. Accordingly, when the neck portion 13 and the flange portion 14 pass the inner cylindrical body 12 through the narrowed hole 10 formed in the tapered shape of the funnel-shaped drawing die 9 while being pressed with the insertion rod 9, the neck portion 12 a is squeezed. Further, the deformation of the trunk portion 12 a is not transmitted to the neck portion 13 and the flange portion 14. Therefore, the neck part 13 and the flange part 14 hold | maintain a perfect circle.

As an application example of the present invention, a double aerosol container of a type in which a propellant is filled from the bottom of the container body, or a double aerosol of a type in which a propellant is filled from between the container body and the flange portion of the inner cylinder body All double aerosols such as double aerosol containers with no packing between the bead part and flange, or double aerosol containers with packing between the bead part and flange. As a result, it is possible to provide an aerosol container that effectively prevents the contents and propellant from leaking from between the bead portion and the mounting cup. Can be widely filled with cosmetics, food, paint, etc.

Sectional drawing which shows the manufacturing method of the double aerosol container of Example 1 which concerns on this invention. Sectional drawing which shows the manufacturing method of the double aerosol container of Example 2 which concerns on this invention. The expanded sectional view which shows the manufacturing method of the double aerosol container of Example 2 which concerns on this invention. Sectional drawing which shows the insertion process of Example 1 and 2 which concerns on this invention. Sectional drawing which shows the manufacturing method of the conventional double aerosol container. Sectional drawing which shows the insertion process of the conventional double aerosol container.

Explanation of symbols

1 11 Container body 2 12 Inner cylinder 2a 12a Body 2b 12b Crease 2c 12c Bottom 3 13 Neck 4 14 Flange 5 15 Convex 6 16 Bead 7 7 Valve 8 18 Mounting cup 19 Packing

Claims (3)

In the method of manufacturing a double aerosol container in which an inner cylinder is inserted into a container body while inserting an insertion rod into the inner cylinder and reducing the outer diameter of the inner cylinder with a funnel-shaped drawing mold, In order to prevent the neck portion and the flange portion from being deformed, the inner cylindrical body in which a size of the neck portion is formed long and a plurality of convex portions are formed around the neck portion is inserted into the container body. A method for manufacturing a double aerosol container.
2. The method for producing a double aerosol container according to claim 1, wherein a packing is interposed between the flange portion of the inner cylinder and the convex portion of the inner cylinder.
A double aerosol container produced by the production method according to claim 1 or 2.

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