JPH0220307B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an aerosol container equipped with an aluminum inner bag and a method for manufacturing the same. The purpose is to prevent wrinkles, etc.

Prior Art Conventionally, an idea as described in Publication of Utility Model Publication No. 15283-1983 is known for attaching an inner bag to an aerosol container to separate the injection contents from the propellant, or to separate and store multiple injection contents. ing. Various materials have been used for the inner bag, but those using plastic, such as the one proposed above, often allow the propellant and contents to pass through each other, and have many problems with barrier properties. It was hot.

In addition, a thin aluminum inner bag that is easily deformable is often used as a material with excellent barrier properties.
The inner bag is attached to the container body by inserting it from the upper opening edge of the container body. An inner bag made of thin aluminum that is easily deformed, such as aluminum foil, is extremely prone to wrinkles due to contact during installation, etc., and when wrinkles occur, the wrinkles may form in the area and have poor resilience against bending. Therefore, conventionally, as shown in FIG. 1, the entire inner bag 1 has an outer diameter smaller than the inner diameter of the upper opening edge of the container body 2, and is inserted from the upper opening 4 of the container body 2 to which the bottom lid 3 is fixed in advance. A method of attaching it is used. Although this method does not cause wrinkles, bends, etc. in the inner bag 1, it has the drawback that the amount of contents to be filled is limited and small, making it uneconomical.

Problems to be Solved by the Invention The present invention aims to solve the above-mentioned problems by increasing the filling amount of aerosol contents while using an aluminum inner bag with excellent barrier properties. This is intended to make it possible to prevent the occurrence of cracks, etc.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention forms an aluminum inner bag that has a shoulder that approximately matches the shape of the shoulder on the inner surface of the container body using a thin aluminum material that is easily deformable. However, the diameter of the bottom of this inner bag is smaller than the diameter of the opening at the lower end of the container body, and a propellant injection valve is provided in the bottom cover of the container body.

In addition, this aerosol container manufacturing method involves inserting a thin aluminum inner bag that is easily deformable and having a shoulder shape that roughly matches the shoulder shape of the inner surface of the container body into the container body through the opening at the lower end of the container body. After engaging the opening edge of the bag along the opening edge of the container body, fixing the bottom cover with the injection valve to the lower end opening, filling the inner bag with the contents, and then moving the valve body along the opening edge of the inner bag. It is characterized in that the propellant is fixed to the opening edge of the container body via the container body, and finally the propellant is filled into the container body from the injection valve in the bottom cover.

Further, the aluminum inner bag may be formed entirely of aluminum material to be easily deformable and thin.

Further, the aluminum inner bag may have an opening edge portion formed from a plastic molded product.

Function As described above, the present invention uses an aluminum inner bag that is formed to have an outer diameter larger than the inner diameter of the upper opening edge of the container body and has a shoulder shape that approximately matches the shoulder shape of the container body. Therefore, the filling capacity of the inner bag is significantly increased compared to the conventional method,
It can be used economically. In addition, the inner bag with a larger diameter has a lower bottom diameter smaller than the diameter of the opening at the bottom of the container body, and is inserted from the opening at the bottom of the container body, so the inner bag may wrinkle when worn and may not be easily restored. It can be inserted and fixed into the container body without causing difficult bending, and it is possible to increase the filling amount without damaging the inner bag.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings of FIGS. forms a lower end opening 14 to which the bottom cover 13 can be fixed. The inner bag 17, which has a shoulder 16 that substantially matches the inner surface shape of the shoulder 15 of the container body 10, is made of aluminum material and has a thin wall that is easily deformable. , is formed smaller than the diameter of the container body 10, and is inserted into the inner bag 17 from the lower end opening 14 of the container body 10. After the opening edge 18 of the inner bag 17 is bent and engaged with the opening edge 19 of the container body 10, the bottom lid 13 having the injection valve 21 is secured to the lower end opening 14 by tightening. After filling the inner bag 17 fixed in the container body 10 with the contents that do not contain propellant, the mounting cup of the valve body 11 and the like are inserted into the container via the opening edge 18 of the inner bag 17. Main body 1
0 opening edge 19. Finally, the propellant is filled into the container body 10 through the injection valve 21 of the bottom lid 22, but this filling is carried out through the soft rubber part 21 of the injection valve 21.
Alternatively, injection may be carried out by penetrating the injection needle, or by removing the soft rubber part 23, filling the propellant, and fitting the soft rubber part 23 into the injection valve 21 after filling is completed. good.

In addition, in the first embodiment, the aluminum inner bag 17 is made entirely of aluminum and has a thin wall that is easily deformable. However, in the present invention, the aluminum inner bag 17 is This does not mean that it is formed only of aluminum material, but also includes those in which part of it is replaced with other materials, and in other different embodiments, Figs. 4 and 5 As shown in the figure, the inner bag 17 made of aluminum has an opening edge 18 and a shoulder portion 16 made of a plastic molded product 24 made of a soft elastic material, and a part filled with contents connected to the plastic molded product 24. The opening edge 1 of the container body 10 is made of aluminum material with a thin wall that is easily deformable.
9, and securely prevents the possibility of cracks, wrinkles, etc. due to excessive tension, aperture, etc. at the shoulder portion 16 and opening edge 18 when integrally molded with aluminum material. It is something that can be done.

Effects of the Invention As described above, the present invention forms an aluminum inner bag having a shoulder that substantially matches the shape of the shoulder on the inner surface of the container body using a thin aluminum material that is easily deformable, and the inner bag has a lower bottom diameter. Since the diameter of the inner bag is smaller than the diameter of the opening at the bottom end of the container body, the filling capacity of the inner bag is significantly increased compared to the conventional method using an aluminum inner bag, and it is economical. It can be used for various purposes. In addition, this inner bag with a larger diameter can be inserted from the bottom opening of the container body, and can be inserted and fixed into the container body without causing wrinkles or bends that are difficult to restore. This makes it possible to increase the filling amount without damaging the inner bag.

[Brief explanation of drawings]

The drawings show embodiments of the present invention; FIG. 1 is a cross-sectional view of a conventionally known example, FIG. 2 is a cross-sectional view of the first embodiment of the inner bag of the present invention, and FIG. 3 is a cross-sectional view of the inner bag of the present invention. FIG. 4 is a cross-sectional view showing another different embodiment, and FIG. 5 is an enlarged cross-sectional view of the opening edge portion of FIG. 4. 10... Container body, 11... Valve body, 13...
... Bottom lid, 14 ... Lower end opening, 15, 16 ... Shoulder, 17 ... Inner bag, 18, 19 ... Opening edge, 21
... Injection valve, 22 ... Bottom cover, 24 ... Plastic molded product.

Claims (1)

[Claims] 1. An aluminum inner bag is formed from a thin aluminum material that is easily deformable and has a shoulder that approximately matches the shape of the shoulder on the inner surface of the container body, and the diameter of the bottom of this inner bag is set to the diameter of the bottom of the container. An aerosol container equipped with an aluminum inner bag, the diameter of which is smaller than the diameter of the opening at the bottom of the main body, and a propellant injection valve provided on the bottom cover of the container main body. 2. An aerosol container equipped with an aluminum inner bag according to claim 1, wherein the aluminum inner bag is made entirely of aluminum material and is thin enough to be easily deformed. 3. An aerosol container equipped with an aluminum inner bag according to claim 1, wherein the aluminum inner bag has an opening edge portion made of a plastic molded product. 4. Insert a thin aluminum inner bag that is easily deformable and has a shoulder shape that roughly matches the shoulder shape of the inner surface of the container body through the opening at the lower end of the container body, and insert the opening edge of the inner bag into the container body. After engaging along the opening edge, the bottom cover with the injection valve is fixed to the lower end opening, and after filling the inner bag with contents, the valve body is inserted along the opening edge of the container body through the opening edge of the inner bag. A method for manufacturing an aerosol container equipped with an aluminum inner bag, characterized by fixing the aerosol container to the aluminum inner bag, and finally filling the container body with a propellant from an injection valve in the bottom cover. 5. The method for manufacturing an aerosol container equipped with an aluminum inner bag according to claim 4, wherein the aluminum inner bag is made entirely of aluminum material and has a thin wall that is easily deformable. 6. The method of manufacturing an aerosol container with an aluminum inner container according to claim 4, wherein the aluminum inner bag has an opening edge portion made of a plastic molded product.