JPS6235904B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION OBJECTS OF THE INVENTION (Industrial Field of Application) The present invention relates to a method of manufacturing a dispersion container, such as an aerosol can, which defines separate product and propellant chambers.

(Prior Art) This type of dispersion container is generally referred to as a seprocan, and a product chamber and a propellant chamber are formed by a collapsible inner bag inserted into the container body. has been done. By opening a manual dispersion valve provided on the top lid of the container body, the spray liquid in the product chamber is sprayed by the pressurized propellant filled in the propellant chamber.

The inner bag is made by blow molding a plastic material such as polyethylene, and
The upper end of the inner bag is formed with an annular groove that can engage with the rim provided on the top lid, but this annular groove only functions to engage with the rim.
The annular groove is therefore a normal recess.

When manufacturing a spray container, in order to fit the inner bag to the upper lid, the inner bag is inserted through the upper opening of the container body, and after the inner bag is inserted, it is fixed to the upper opening by wrapping. The inner bag is pulled out through the opening of the upper lid, the annular groove is engaged with the rim of the upper lid, the tip of the inner bag is cut near the annular groove, and the peripheral edge of the annular groove is heat-formed into the shape of the rim. I try to make it fit.

Therefore, in the spray container configured as described above, after cutting (trimming) the tip of the inner bag, a heat forming process and a cooling process are required for the inner bag, and the material of the inner bag must be made of a highly flexible material. There are disadvantages in that it is limited and the manufacturing process increases, resulting in high cost.

(Problems to be Solved by the Invention) As described above, if the tip of the inner bag is cut off and then heat-formed to engage the inner bag with the rim, the number of manufacturing steps will increase. Unable to lower costs.

Therefore, the present invention eliminates the above-mentioned drawbacks, and eliminates the footform process that was necessary when fitting the inner bag in the conventional method, and reduces the number of processes, thereby reducing manufacturing costs. The purpose is to provide

[Structure of the invention]

(Means for Solving the Problems) The method of manufacturing the spray container of the present invention is made of a plastic material having an annular groove corresponding to the shape of the rim provided at the periphery of the opening of the top lid. An inner bag material is provided, the inner bag material is placed inside the spray container body, the upper end of the inner bag material is pulled out through the opening of the top lid of the spray container body, and the annular groove of the inner bag material is inserted into the rim of the top lid. The dispersion valve is tightly fitted into the inner bag material, the portion above the annular groove of the inner bag material is trimmed, and the dispersion valve is fixed to the opening of the upper lid.

Example An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 10 denotes a spraying container body, and an inner bag 11 in which a product to be sprayed is stored is disposed within the spraying container body 10. As shown in FIG.

The dispersion container main body 10 has a cylindrical body 1 with openings at both ends.
2, and a top cover 13 and a bottom cover 14 each fixed to both ends of the cylindrical body 12 by double seaming means.
The upper lid 13 includes an upwardly projecting dome-shaped portion 15, and the periphery of the central opening of the dome-shaped portion 15 is rolled upward and radially outward to form a rim portion 16. The bottom cover 14 protrudes upward and is provided with an injection valve 17 at the center for injecting propellant.

On the other hand, the inner bag 11 is formed by blow molding a plastic material such as polyethylene, and has a cylindrical side wall 18, a domed upper end 19, and a bottom wall 20. The cylindrical side wall 18 is provided with a large number of folds 21, 21, . . . at intervals in the longitudinal direction to prevent the side wall 18 from collapsing irregularly.

On the other hand, the upper end 19 of the inner bag 11 is provided with an annular groove 22 . Upper peripheral edge 23 of the annular groove 22
extends outward in the radial direction and is formed to match the shape of the rim portion 16 of the upper lid 13.

Therefore, in order to manufacture a dispersion container, a rim portion 1 provided at the periphery of the opening of the upper lid 13 is provided at the periphery of the opening at the upper end.
An inner bag material 11a provided with an annular groove 22 corresponding to the shape of 6 is prepared, and this inner bag material 11a is placed inside the spray container main body 10. As shown in FIG. is pulled out from the top lid 13, and the annular groove 22 of the inner bag material 11a is tightly fitted into the rim portion 16 of the top lid 13. Next, the drawn-out inner bag material 11a is cut by a trimming device (not shown) at the position shown by the dotted line to form the inner bag 11.

Further, a dispersion valve 24 is attached to the opening of the upper lid 15 of the container body 10 into which the inner bag 11 is fitted, and the dispersion valve 24 is fixed to the rim portion 16 of the upper lid 15 as shown in FIG.

Note that a propellant chamber 25 formed between the container body 10 and the inner bag 11 is filled with propellant via an injection valve 17.

When the spray valve 24 is pressed to spray the product, the propellant in the propellant chamber 25 is applied to the inner bag 1.
1, the inner bag 11 is pushed upward in the axial direction, and the product in the inner bag 11 is scattered.

〔Effect of the invention〕

As described above, according to the present invention, the shape of the annular groove provided in the inner bag is set to match the shape of the rim part of the top lid when forming the inner bag material, so that the inner bag material can be molded. When trimming to form an inner bag, no additional process is required, and therefore the manufacturing process is shortened, resulting in an effect of lowering manufacturing costs.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway cross-sectional view of a dispersion container manufactured by the method of manufacturing a dispersion container of the present invention, Fig. 2 is an explanatory diagram showing how the inner bag material is attached to the container body, and Fig. 3 is a dispersion FIG. 3 is a diagram showing a joint portion between the inner bag and the upper lid of the container. 10...Spraying container body, 11...Inner bag, 13...
... Upper lid, 16 ... Rim part, 22 ... Annular groove.

Claims (1)

[Claims] 1. An inner bag material made of a plastic material is provided on the periphery of the upper end opening and has an annular groove corresponding to the shape of the rim provided on the periphery of the opening of the upper lid, and this inner bag material is placed inside the spray container body. , pull out the upper end of this inner bag material from the opening of the top lid of the spray container body, tightly fit the annular groove of the inner bag material into the rim of the top lid, and trim the portion above the annular groove of the inner bag material. A method of manufacturing a spraying container, characterized in that a spraying valve is then fixed to an opening of the upper lid.