JP3879049B2 - Method for producing double aerosol container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a double aerosol container, and more particularly to a method for manufacturing a double aerosol container in which a synthetic resin inner cylinder (hereinafter referred to as “inner cylinder”) can be smoothly and smoothly inserted into an aerosol container.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a double aerosol container that separates and stores contents ejected from an aerosol container and compressed gas for pressurizing an inner cylinder that stores the contents has been used. Such a double aerosol container is usually composed of a double structure of a pressure-resistant metal container made of a metal such as aluminum or steel and an inner cylinder crushed by the pressing force of compressed gas. In addition, as another double aerosol container, the inner cylinder in which the permanent wave liquid, hair dye, etc. are housed is installed on the inner peripheral surface of the metal container, thereby preventing the metal container from being corroded by the contents. There are corrosion resistant aerosol containers. In this corrosion-resistant aerosol container, the inner cylinder is in close contact with the inner surface of the metal container in order to prevent the gap between the metal container and the inner cylinder from being filled with compressed gas and preventing the contents from directly contacting the inner surface of the metal container. .
[0003]
Such a conventional double aerosol container is shown in FIG. 50 is an aerosol container and 51 is an inner cylinder inserted into the aerosol container 50. The aerosol container 50 is formed by integrally molding the body and the bottom by impact molding or the like, and then the necking process is performed on the opening 52. After the opening 52 is squeezed from the outer diameter of the body, the opening is curled. A curled portion 53 is formed on 52. The inner cylinder 51 is folded and inserted into the aerosol container 50 through the opening 52 of the curl 53, and then a mounting cup (not shown) is fixed and assembled.
[0004]
[Problems to be solved by the invention]
However, in such an invention, the opening diameter of the curled portion 53 to which the mounting cup is fixed is small and constant regardless of the outer diameter of the body portion of the aerosol container 50. This is because if the opening diameter is small and constant, the pressure resistance and leakage are excellent. However, in the aerosol container 50 having a large barrel outer diameter, the barrel outer diameter of the inner cylinder 51 to be inserted is similarly large. Therefore, in the step of inserting the inner cylinder 51, the inner cylinder 51 is smaller than the curled portion 53. There was a drawback that it could not be inserted into the aerosol container 50 from the opening. Accordingly, the outer diameter of the body portion of the inner cylinder 51 is limited to that which can be inserted from the opening of the curled portion 53, so that the capacity of the contents to be stored is limited.
[0005]
The present invention has been made by paying attention to such a conventional problem, and is a double aerosol container capable of smoothly and smoothly installing an inner cylinder mounted in an aerosol container having a large barrel outer diameter in an aerosol container. An object is to provide a manufacturing method.
[0006]
[Means for Solving the Problems]
In order to solve this problem, the first invention according to this application is to insert an inner cylinder made of a synthetic resin into a bottomed cylindrical metal container, press the opening of the inner cylinder, and By embedding it in the body part of the metal, the length of the inner cylinder is reduced, and then the opening part of the metal container is necked to squeeze the opening part, and then the curling process is performed. A method for producing a double aerosol container, comprising: a step of forcibly pulling out a flange portion of a cylinder onto a curled portion of a metal container, and a step of fixing a valve via a mounting cup. The second invention inserts an inner cylinder made of synthetic resin into a bottomed cylindrical metal container, presses the opening of the inner cylinder, and embeds the opening in the trunk of the inner cylinder. A process of forcing the opening of the inner cylinder from the inside of the barrel of the inner cylinder using a drawing device. Then, it is the manufacturing method of the double aerosol container characterized by passing through the process of fixing a valve | bulb in an opening part .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show an embodiment outside the scope of the present invention , and relate to a double aerosol container with an inner cylinder that is crushed by a pressing force of compressed gas. In FIG. 1A, reference numeral 1 denotes a metal container, and the metal container 1 is formed integrally with a body portion and a bottom portion by impact molding or the like of aluminum slag. In addition, this metal container 1 may be formed by separately forming a body portion and a bottom portion and winding them. Next, FIG. 1B is a view showing a state in which the opening 1a of the metal container 1 is squeezed using the squeezing die 2a. The intermediate process of the necking process in which the necking process was performed at the drawing rate of% is shown. Next, FIG. 2C shows a state in which the inner cylinder 3 is folded and inserted into the metal container 1 from the opening 1a subjected to the necking process. Since the opening 1a is narrowed at a drawing ratio of about 25% with respect to the outer diameter of the body portion, the opening diameter is relatively large, and the inner cylinder 3 can be inserted smoothly and smoothly. In addition, when inserting the inner cylinder 3, it cannot be overemphasized that the opening diameter of the opening part 1a in the intermediate process of necking can be determined arbitrarily.
[0008]
FIG. 2D is a drawing in which necking is further applied to the opening 1a using the drawing die 2b. In this step, the opening 1 a is narrowed down with a drawing ratio of 40% or more of the outer diameter of the body portion of the metal container 1. FIG. 3E shows a state in which the opening neck 1a has been subjected to final necking, and the valve 4 is inserted and the tip 1b of the opening 1a is bent at the top surface of the valve 4. FIG. 4 is a view showing a state in which the valve 4 is fixed in the opening 1a. In the next step, the contents are filled into the inner cylinder 3 from the valve 4, and the compressed gas is filled between the metal container 1 and the inner cylinder 3 from the hole 1 c at the bottom of the metal container 1.
[0009]
The inventors devised this manufacturing method in view of the fact that it is impossible to subsequently insert the inner cylinder 3 having a large barrel outer diameter from the opening 1a having a dimension to which the valve 4 is fixed. In an intermediate process in which the opening 1a is not necked up to the final opening diameter, the inner cylinder 3 is inserted into the metal container 1 and then the opening 1a is further necked to make the inner cylinder 3 smooth and smooth. It has been found that the metal container 1 can be installed inside. Incidentally, FIGS. 1 to 3 is composed of a double structure of an inner cylinder 3 to be crushed by the pressing force of the compressed gas and the metal container 1, there is shown an embodiment of a dual aerosol container, compression The present invention can also be applied to the production of a corrosion-resistant aerosol container composed of only the metal container 1 that is not filled with gas and the inner cylinder 3 that is internally provided inside the metal container 1.
[0010]
Next, FIGS. 4 and 5 show an embodiment outside the scope of the present invention . Similar to the double aerosol container of FIG. 1, the double cylinder with an inner cylinder that is crushed by the pressing force of compressed gas. It relates to aerosol containers. In FIG. 4 (O), reference numeral 1 denotes a metal container. The metal container 1 is formed integrally with a body portion and a bottom portion by impact molding or the like of aluminum slag, as in the first invention. An inner cylinder 3 is inserted into the metal container 1. This form differs from the form of FIG. 1 in that the inner cylinder 3 is inserted before the opening 1a of the metal container 1 is necked. Thereafter, as shown in FIG. 4 (P), the opening 1a of the metal container 1 is narrowed down by a drawing die 2a. The drawing rate in the process of FIG. 4 (P) is about 4% with respect to the outer diameter of the body portion of the metal container 1. Furthermore, FIG. 5 (Q) is a drawing in which the opening 1a is drawn using the drawing die 2b. In the process of FIG. 5 (Q), the metal container 1 is narrowed down to about 20% of the outer diameter of the body portion. FIG. 5 (R) is a view showing a state in which the valve 4 is inserted and fixed after the final necking process is performed on the opening 1a. That is, the drawing shows a state in which the valve 4 is fixed in the opening 1 a by bending the tip 1 b of the opening 1 a at the top surface of the valve 4. In the next step, the contents are filled into the inner cylinder 3 from the valve 4, and the compressed gas is filled between the metal container 1 and the inner cylinder 3 from the hole 1 c at the bottom of the metal container 1. 4 and 5 showing this embodiment show an embodiment of a double aerosol container constituted by a double structure of the metal container 1 and the inner cylinder 3 crushed by the pressing force of the compressed gas. However, this embodiment can also be applied to the production of a corrosion-resistant aerosol container that is composed only of the metal container 1 that is not filled with the compressed gas and the inner cylinder 3 that is housed inside the metal container 1.
[0011]
6 and 7 show an embodiment of the first invention and relate to a corrosion-resistant aerosol container. In FIG. 6 (W), 5 is a metal container, and this metal container 5 is made of an aluminum slag integrally made of a barrel and a bottom by impact molding or the like. An inner cylinder 6 is inserted into the metal container 5. Next, the inserted inner cylinder 6 is configured so that the length of the inner cylinder 6 is shortened by the mouth 6a being pressed from above and embedded in the body of the inner cylinder 6 [FIG. W) Refer to a two-dot chain line]. FIG. 6 (X) is a view showing a state in which the opening 5a of the metal container 5 is necked to narrow down the opening 5a. In this case, since necking is performed with the mouth 6a of the inner cylinder 6 buried below, the mouth 6a of the inner cylinder 6 is not damaged during necking. In this state, the opening 5a is narrowed down to an opening diameter capable of fixing the mounting cup 9.
[0012]
FIG. 7 (Y) is a view showing a state in which the inner cylinder 6 is pulled out onto the curled portion 5 b of the metal container 5 using the drawer device 8. The drawer device 8 shown in FIG. 7Y has a structure in which the balloon portion 8a expands when air is supplied to the inside. Then, the balloon portion 8a is engaged with the root of the mouth portion 6a of the inner cylinder 6, and the drawer device 8 is lifted in this state, thereby forcibly pulling out the flange portion 6b of the mouth portion 6a onto the curled portion 5b. Can do. FIG. 7 (Z) is a cross-sectional view showing a state in which the valve 9 is fixed with the flange 6b of the inner cylinder 6 interposed therebetween. As shown in FIG. 8, the drawer device 11 may be a device composed of a link mechanism 11 a having a hooking claw, or air is directly supplied into the inner cylinder 6 and the inner cylinder 6 is expanded. A method of forcibly pulling out the flange portion 6b may be used. 6 and 7 showing the first invention show an embodiment of a corrosion-resistant aerosol container, but the first invention is composed of a double structure of an inner cylinder and a metal container that are crushed by the pressing force of compressed gas. It can also be applied to the production of double aerosol containers.
[0013]
The second invention is a further embodiment of the first invention, the first invention is to fix the mounting cup 9 to curl portion 5b downward, the type of aerosol for fixing the valve 10 to the opening 5a of the metal container 5 In contrast to the container, the second invention does not form a curled portion at the opening of the metal container, but the tip of the metal container is bent at the top surface of the valve, or the opening is covered with a lid to crimp the valve. By this, it is an aerosol container of the type which fixes a valve in an opening. (Not shown)
[0014]
[Reference example]
Specific examples outside the scope of the present invention are shown below. 1-3, after narrowing the opening 1a of the metal container 1 having a body outer diameter of 45φ to an opening diameter of 34φ (squeezing ratio of 24%), the inner cylinder 3 having a body outer diameter of 43φ is Inserted from the opening 1a. After that, the opening 1a was further necked and narrowed down to a final opening diameter of 23φ to fix the valve 4. As a result of the test, in the metal container 1 having the outer diameter of the body portion of 35 mm of the metal container 1, it is possible to insert the inner cylinder 3 having an inner body size of 33% from the opening 1 a having the final opening diameter of 23 φ. However, in the case of the metal container 1 having a barrel outer diameter of 40φ or more, it is impossible to insert the internal cylinder 3 from the opening 1a having the opening diameter of 23φ, and the opening 1a is narrowed down. It was found that it was necessary to insert the inner cylinder 3 once in the intermediate process. The following table shows the dimensions of each part of the metal container 1 and the inner cylinder 3.
[Table 1]
[0015]
【The invention's effect】
As described above, according to the manufacturing method of the present invention, when inserting an inner cylinder having a large barrel outer diameter into an aerosol container having a large barrel outer diameter, the inner cylinder is smoothly and smoothly inserted. it can.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a method for producing a double aerosol container outside the scope of the present invention.
FIG. 2 is a cross-sectional view showing a method for manufacturing a double aerosol container outside the scope of the present invention.
FIG. 3 is a cross-sectional view showing a method for manufacturing a double aerosol container outside the scope of the present invention.
FIG. 4 is a cross-sectional view showing a method for manufacturing a double aerosol container outside the scope of the present invention.
FIG. 5 is a cross-sectional view showing a method for manufacturing a double aerosol container outside the scope of the present invention.
FIG. 6 is a sectional view showing the manufacturing method of the first invention according to the present invention.
FIG. 7 is a sectional view showing the manufacturing method of the first invention according to the present invention.
FIG. 8 is a cross-sectional view showing another embodiment of the drawer device in the first invention according to the present invention.
FIG. 9 is a perspective view showing a state where an inner cylinder is inserted into a conventional aerosol container.

Claims (2)

By inserting a synthetic resin inner cylinder into a bottomed cylindrical metal container, pressing the opening of the inner cylinder, and embedding the opening in the barrel of the inner cylinder, the length of the inner cylinder is reduced. After that, necking is performed on the opening of the metal container, the opening is squeezed and curled, and then the inner cylinder flange is forcibly pulled out onto the curl of the metal container using a drawing device. A method for producing a double aerosol container, characterized by passing through a step and a step of fixing a valve via a mounting cup. Inserting a synthetic resin inner cylinder into a bottomed cylindrical metal container, pressing the opening of the inner cylinder, and embedding the opening in the barrel of the inner cylinder reduces the length of the inner cylinder. Then, the opening of the metal container is necked to narrow the opening, and then, using a drawing device, the opening of the inner cylinder is forcibly pulled out from the body of the inner cylinder, and then into the opening. A method for producing a double aerosol container, comprising a step of fixing a valve.