JPH09118345A - Container for filling liquid substance and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container for filling liquid substance which is easy to have a sense of high quality and a feeling of metal, which is hardly to be broken and which is excellent in anticorrosion. SOLUTION: A container for filling liquid substance comprises a bottomed cylindrical can 1a made of metal having a body 2, a shoulder 3 and a narrow- diameter neck 5, and a screw ring 8 attached to the neck 5 of the can 1a. The screw ring 8 has a flange 14 and a screw ring body 8a, wherein the flange 14 is formed to protrude outward in a diameter direction and formed with a cut, and a screw part 7 is formed on the screw ring body 8a. An end rim of the neck 5 is bent outward to form a curl 6 with the flange 14 rolled in and also is locked to the cut of the flange 14, while a protective paint film 4 is formed on an inner face of the can 1a and on an outer face of the curl 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container for filling a liquid material such as a hair liquid, a tonic, a hair-growth agent, an emulsion, a lotion and a method for producing the same. More specifically, the present invention relates to a liquid material filling container having good corrosion resistance, and a manufacturing method capable of manufacturing the liquid material filling container by slightly modifying an existing aerosol can manufacturing device.

[0002]

2. Description of the Related Art As a container for filling a liquid substance such as cosmetics, a container having a shape as shown in FIGS. 7 and 8 is known. The container 31 illustrated in FIG. 7 is made of synthetic resin, is made by blow molding, and has a bottomed cylindrical body portion 32, a shoulder portion 33 formed on the upper portion thereof, and a cylindrical neck portion 35. A screw portion 37 is provided on the outer circumference of the neck portion 35.

Such a container is mainly filled with a hair liquid, a tonic, a hair-growth agent, etc., an inner plug 39 for adjusting the discharge amount is fitted into the neck portion 35, and the container mouth portion is screwed into the screw portion 37. Used with a matching protective cap or pump assembly closed. There is also a container formed of glass, and in this case, it is mainly used for containers such as emulsions and lotions.

A container 41 shown in FIG. 8 is formed of a metal such as aluminum and has a bottomed cylindrical body 42, a shoulder 43 formed on the upper portion thereof, and a cylindrical neck 45. A screw portion 47 is provided on the outer circumference of the neck portion 45.
A concave portion 48 is formed at a position corresponding to the screw portion 47 on the inner peripheral surface side of the neck portion 45 of the container 41. Similar to the above-mentioned synthetic resin container and glass container, such a container is used not only by filling a liquid substance such as cosmetics and closing the mouth with a protective cap or the like, but also by using a felt or the like on the neck 45. The formed writing member is attached and it is also used as a writing instrument such as a magic pen.

[0005]

It is desirable that a container for filling a liquid material such as a cosmetic product should have a high-class feeling and a metallic feeling depending on the design and material of the outer surface. However, in the above-mentioned conventional synthetic resin container, since the material is synthetic resin, it is difficult to give a high-class feeling and a metallic feeling even if the outer surface is printed with a package design or the like. Further, in the case of the above-mentioned conventional glass container, it is possible to give a high-grade feeling by making the surface thereof a ground glass shape, but it is difficult to give a metallic feeling. It also has a problem that it is easily damaged by a shock such as dropping.

Further, in the above conventional metal container,
Although it is easy to give a high-grade feeling and a metallic feeling, there are the following problems. In such a metal container, the inner surface of the container is usually coated to prevent corrosion of the inner surface of the container to form a protective coating film. When performing the formation of this protective coating, in the manufacturing process of the container, either a method of forming a coating film before forming the container, or a method of forming a container after forming the coating film. Has been taken.

However, when the container is molded after forming the protective coating film on the inner surface of the container, the protective coating film may be damaged during the molding operation (Japanese Patent Publication No. 6-5151).
No. 0). In particular, the protective coating is often damaged when molding the screw portion. On the other hand, when the inner surface is coated after molding, as shown in FIG. 8, since the concave portion 48 is formed on the inner peripheral surface of the neck and there is unevenness, the protective coating film is evenly formed on this portion. It is difficult to form, and there are cases where a portion where the protective coating film is not formed remains. Further, it may be difficult to apply the coating on the upper surface of the neck opening end 45a of the neck 5 depending on the current coating device, and the protective coating may not be formed.

When the protective coating film is damaged or is poorly formed as described above, depending on the contents filled in the container, the container may be corroded due to the contact of the contents with this portion.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a container for filling a liquid material, which easily gives a high-grade feeling and a metallic feeling, is hard to be broken, and has good corrosion resistance. To do.

[0010]

A container for filling a liquid material according to the present invention comprises a body, a shoulder formed on the upper part of the body, and a neck having a small diameter formed on the upper part of the shoulder. A bottomed tubular can part made of metal and a screw ring attached to the outer periphery of the neck of the can part, the screw ring comprising a flange formed at the upper end of the screw ring, and a screw. A ring body, the flange is formed to project radially outward, and a notch is formed in a side portion or a bottom portion of the flange, and a screw portion is formed on an outer periphery of the screw ring body. The end edge portion of the neck portion is curved outward in the radial direction to wind the flange to form a curl portion, and the end portion of the neck portion is locked in the notch of the flange so that the screw ring is fixed to the neck portion. , A protective coating film on the inner surface of the can portion and the outer surface of the curl portion. Made is characterized in that is.

Further, a ring-shaped neck inner peripheral projection is formed on the inner periphery of the neck of the can portion, a ring-shaped neck outer peripheral recess is formed on the outer periphery of the neck, and a ring-shaped screw is formed on the inner periphery of the screw ring. A ring inner peripheral convex portion may be formed, and the screw ring inner peripheral convex portion may be provided so as to be fitted into the neck outer peripheral concave portion.

Further, in the method for producing a liquid filling container of the present invention, a protective coating film is formed on the inner surface of a bottomed cylindrical container, the outer surface is printed, and then the upper part of the bottomed cylindrical container is formed. After forming a shoulder portion and a neck portion on the outer periphery of the neck portion, a screw ring having a flange at the upper end is attached to the outer periphery of the neck portion, and then the end edge portion of the neck portion is curved outward in the radial direction, and the flange is wound and locked. It is characterized by

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of a liquid material filling container according to the present invention, in which reference numeral 1 is a liquid material filling container. The liquid material filling container 1 is roughly configured by a can portion 1 a and a screw ring 8.

The can portion 1a is made of a metal such as aluminum or tin, and has a cylindrical body portion 2, a shoulder portion 3 formed on the upper portion of the body portion 2, and an upper portion of the shoulder portion 3. And a neck portion 5 having a small diameter. Here, the neck portion 5 is formed in a cylindrical shape.

Further, as shown in FIG. 2, a ring-shaped neck outer peripheral concave portion 10 is formed on the outer periphery of the neck portion 5, and a neck-shaped inner peripheral convex portion 13 is formed on the inner periphery of the neck portion 5 so as to project small in a ring shape. Are formed. This neck peripheral recess 10
The cross section of each of the inner peripheral convex portion 13 and the neck is substantially arcuate.

The screw ring 8 has a hollow cylindrical shape made of synthetic resin or the like, and its inner peripheral surface is attached to the neck portion 5 in close contact with the outer peripheral surface of the neck portion 5. This screw ring 8
Is a flange 14 provided on the upper end of the screw ring 8,
It is composed of a screw ring body portion 8a and a reduced diameter portion 8b which separates these.

3 to 5 show the screw ring 8. As shown in FIGS. 3 and 4, the flange 14 is formed so as to project outward in the radial direction, and has a plurality of notches 15 provided along the circumferential direction on its side portion.

A screw portion 7 is provided on the outer periphery of the screw ring body portion 8a, and as shown in FIG. 5, a ring-shaped screw ring inner peripheral convex portion 11 is formed on the inner periphery of the screw ring 8.
Is provided. The inner peripheral projection 11 of the screw ring is formed so as to have a substantially arcuate cross section, and is fitted into the outer peripheral recess 10 of the neck 5.

Further, as shown in FIG. 2, the end portion of the neck portion 5 of the can portion 1a is curved outward in the radial direction, and the flange 1
4 is rolled up to form a curl portion 6. The edge 6a of the curl portion 6 is arranged below the bottom surface 14a of the flange 14.

The curl portion 6 is in contact with the upper side edge 14b and the lower side edge 14c of the flange 14, and the flange 1
4 is locked. Further, the curl portion 6 is formed in the notch 15 of the flange 14 so as to bulge slightly inward in the radial direction (not shown). Further, the curl portion 6 is formed so that its outer diameter is equal to or smaller than the outer diameter of the screw ring body portion 8 a of the screw ring 8.

An inner plug 9 is fitted on the neck portion 5. The inner plug 9 is provided with an inner plug concave portion 12, and the inner plug concave portion 12 of the inner plug 9 is fitted on the neck inner peripheral convex portion 13 of the neck portion 5. It is fixed together.

A protective coating film 4 is formed on the entire inner surface of the can portion 1a and the outer surface of the curl portion 6. The protective coating film 4 includes, for example, epoxy-phenol resin, polyamide-imide resin, epoxy-urea resin,
A paint used for general aerosol cans such as vinyl organosol resin, polyethylene resin, and fluororesin is used.

Further, in the above example, the body portion of the can portion 1a has a cylindrical shape, but it may have an elliptic cylindrical shape or a polygonal cylindrical shape. Further, the notch 15 may be provided on the bottom surface 14 a of the flange 14.

In the liquid material filling container 1 as described above, since the can portion 1a is made of metal, it is easy to give a high-class feeling and a metallic feeling by printing the outer surface.
Also, it is less likely to be damaged even if shocked.

Further, since the screw ring 8 having the screw portion 7 is attached to the outer periphery of the neck portion 5, the screw portion is attached to the neck portion 5.
It is not necessary to form Therefore, damage to the protective coating film 4 at the time of forming the screw portion and defective formation of the protective coating film due to unevenness of the inner circumference of the neck portion do not occur, and the corrosion resistance is good.

Further, in the curl portion 6 of the can portion 1a,
Since the edge 6a is formed to be curved outward in the radial direction, the edge 6a does not come into contact with the content liquid even when the protective coating is not formed on the edge 6a, Corrosion does not occur at the edge 6a.

The curl portion 6 is in contact with the upper side edge 14b and the lower side edge 14c of the flange 14, and the flange 1
The screw ring 8 is fixed to the neck portion 5 because it is formed so as to bulge slightly inward in the radial direction in the notch 15 of 4. Therefore, when the protective cap or the like is screwed onto the screw ring 8, the screw ring 8 does not idle,
The protective cap etc. can be screwed on easily.

Further, since the curl portion 6 is formed so that the outer diameter thereof is equal to or smaller than the outer diameter of the screw ring body portion 8a, when the protective cap or the like is screwed onto the screw ring 8, the curl portion is curled. The part 6 does not interfere with the mounting of the protective cap or the like.

Further, a ring-shaped neck outer peripheral recess 10 is formed on the outer periphery of the neck 5, and a ring-shaped screw ring inner peripheral protrusion 11 is formed on the inner periphery of the screw ring 8. The screw ring inner peripheral protrusion 11 is the outer periphery of the neck. Since the screw ring 8 is configured to fit in the recess 10, the position of the screw ring 8 is stable, and the can portion 1 is used in the manufacturing process of the liquid material filling container 1 as described below.
The curl portion 6 of a can be easily molded.

When the curling portion 6 is molded, with the screw ring 8 attached to the neck portion 5 as will be described later, the end edge portion of the neck portion is curved outward in the radial direction, and the curling portion 6 of the screw ring 8 is bent. The flange 14 is rolled up to form the curl portion 6. At this time, since the screw ring inner peripheral convex portion 11 fits into the neck outer peripheral concave portion 10 to stabilize the position of the screw ring 8, the curl portion 6
Molding becomes easy.

Further, since the neck inner circumference convex portion 13 is provided on the inner circumference of the neck portion 5 of the can portion 1a, when the inner plug 9 having the inner plug concave portion 12 is fitted, the neck inner circumference convex portion 1 is inserted.
3 is fitted into the inner plug recess 12 to stabilize the position of the inner plug 9 and prevent the inner plug 9 from coming off.

Further, since the protrusion height of the neck inner peripheral convex portion 13 of the neck portion 5 is formed to be extremely small, when the neck inner peripheral convex portion 13 is formed in the manufacturing process of the liquid material filling container 1, The protective coating film 4 on the peripheral surface is not damaged.

Next, one embodiment of the method for manufacturing the liquid filling container according to the present invention will be described with reference to FIG. As shown in FIG. 6 (A), the bottomed tubular body 21 is formed by impact molding of a metal ingot or DI molding (draw and ironing molding) of a metal plate material. The tubular body 21 is formed in a cylindrical shape, an elliptic cylindrical shape, a polygonal cylindrical shape, or the like.

Next, as shown in FIG. 6B, the vicinity of the open end of the tubular body 21 is cut at a predetermined position, and the tubular body 21 is cut.
Has a predetermined length. Subsequently, the inner surface of the tubular body 21 is washed and dried, and then an epoxyphenol resin, a polyamideimide resin or the like is applied and baked to form a protective coating film 4 on the inner surface.

Further, after printing such as a package design on the outer peripheral surface of the tubular body 21, the upper portion of the container is reduced in diameter by press working as shown in FIG. 6C, and the shoulder portion 3 and the neck portion 5 are removed. Form.

Subsequently, as shown in FIG. 6 (D), after the neck portion 5 of the tubular body 21 is stretched, roll processing is performed while rotating the tubular body 21 to form a neck outer peripheral recessed portion on the outer periphery of the neck portion 5. 1
0, and a neck inner peripheral projection 13 is formed on the inner periphery of the neck 5.

At this time, in order to adjust the open end of the neck portion 5, the vicinity of the upper end of the neck portion 5 may be cut. Further, in order to facilitate the formation of the curl portion 6 described later, the vicinity of the open end of the neck portion 5 may be formed thin.

Thereafter, as shown in FIG. 6 (E), a separately formed screw ring 8 is attached to the outer periphery of the neck portion 5. At that time, the screw ring inner peripheral convex portion 11 provided on the screw ring 8
Is fitted into the neck outer peripheral recess 10 of the neck 5.

Next, the open end of the neck portion 5 is curved outward in the radial direction, the flange 14 provided on the screw ring 8 is rolled up, and the vicinity of the open end of the neck portion 5 is locked in the notch 15 of the flange 14 to curl. 6 is formed.

By the way, in the conventionally known method for manufacturing an aerosol can, following the steps shown in FIGS. 6A to 6C, the open end of the neck 5 is curved radially outward to The method of forming the curl portion of the aerosol can on the uppermost part of the is adopted.

Therefore, the method for manufacturing the liquid material filling container shown in this embodiment is the same as the method for manufacturing the aerosol can in the steps shown in FIGS. 6 (A) to 6 (C). Further, the curling portion 6 has many parts in common with the forming operation of the aerosol can curling part in the aerosol can manufacturing method. Therefore, in the method of manufacturing the liquid material filling container shown in the present embodiment, the container can be manufactured by adding a slight improvement to the existing manufacturing apparatus used in the manufacturing process of the aerosol can. Therefore, manufacturing costs such as equipment costs can be reduced.

[0043]

EFFECTS OF THE INVENTION Since the can of the liquid material filling container of the present invention is made of metal, it is possible to give a high-class feeling or a metallic feeling by printing the outer surface. Also, it is less likely to be damaged even if shocked.

Since the threaded ring having the threaded portion is attached to the neck, it is not necessary to form the threaded portion on the neck. Therefore, the protective coating is not damaged during molding of the screw portion and the formation of the protective coating due to the unevenness of the inner circumference of the neck does not occur, and the corrosion resistance is good. Further, since a curl portion in which the end edge portion of the neck portion is curved outward in the radial direction is formed in the neck portion, even if a protective coating film is not formed on the end edge portion of the curl portion, the end portion is not exposed to the content liquid. There is no contact and no corrosion occurs in this part.

Further, since the notch is formed on the outer circumference of the flange, the curl portion is locked in the notch and the screw ring is fixed to the neck portion. There is no idle rotation, and it becomes easier to screw on a protective cap or the like.

A ring-shaped neck outer peripheral recess is formed on the outer periphery of the neck, a ring-shaped screw ring inner peripheral protrusion is formed on the inner periphery of the screw ring, and the screw ring inner peripheral protrusion is fitted into the neck outer peripheral recess. Since the position of the screw ring is stable, the curl portion of the can portion can be easily molded in the manufacturing process of the liquid material filling container.

Further, since the neck inner peripheral convex portion is provided on the neck portion of the can portion, when the one having the inner plug concave portion as the inner plug is fitted into the neck portion, the neck inner peripheral convex portion fits into the inner plug concave portion, Stabilize the position of the inner stopper and prevent it from coming off.

Since the method for manufacturing the liquid filling container of the present invention has many steps in common with the method for manufacturing an aerosol can, the container can be prepared by making a slight modification to the existing apparatus used for manufacturing the aerosol can. Can be manufactured. Therefore, manufacturing costs such as equipment costs can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a liquid material filling container of the present invention.

FIG. 2 is an enlarged view of a main part of the liquid material filling container shown in FIG.

FIG. 3 is a top view showing a screw ring of the liquid material filling container of the embodiment.

FIG. 4 is a front view of the screw ring shown in FIG.

5 is a front sectional view of the screw ring shown in FIG.

FIG. 6 is a process drawing showing an embodiment of a method for manufacturing a liquid filling container according to the present invention.

FIG. 7 is a cross-sectional view showing an example of a conventional liquid material filling container.

FIG. 8 is a cross-sectional view showing another example of a conventional liquid material filling container.

[Explanation of symbols]

1 ... Container for filling liquid material, 1a ... Can portion, 2 ... Body portion, 3 ...
..Shoulders, 4 ... Protective coating, 5 ... Neck, 6 ... Curl,
7 ... screw part, 8 ... screw ring, 8a ... screw ring body part, 10 ... neck outer peripheral concave part, 11 ... screw ring inner peripheral convex part, 13 ... neck inner peripheral convex part, 14 ... ..Flanges, 15 ...
Notch

Claims (3)

[Claims] 1. A metal bottomed cylindrical can portion having a body portion, a shoulder portion formed on the upper portion of the body portion, and a thin neck portion formed on the upper portion of the shoulder portion, And a screw ring attached to the outer periphery of the neck of the can portion, the screw ring having a flange formed at the upper end of the screw ring and a screw ring body, and the flange being radially outward. It is formed to project toward
A notch is formed on the outer periphery of the screw ring body, and a screw portion is formed on the outer periphery of the screw ring body, and the edge portion of the neck portion is curved outward in the radial direction and the curl portion is wound around the flange. Along with forming the notch of the flange, the screw ring is fixed to the neck portion, a protective coating is formed on the inner surface of the can portion and the outer surface of the curl portion. Characteristic liquid filling container. 2. A ring-shaped neck inner convex portion is formed on the inner periphery of the neck of the can portion, a ring-shaped neck outer peripheral concave portion is formed on the outer periphery of the neck portion, and a ring-shaped screw is formed on the inner periphery of the screw ring. 2. The liquid material filling container according to claim 1, wherein a ring inner peripheral convex portion is formed, and the screw ring inner peripheral convex portion is provided by being fitted into the neck outer peripheral concave portion. 3. A method of manufacturing a liquid filling container, comprising:
After forming a protective coating film on the inner surface of the bottomed cylindrical container and printing on the outer surface, a shoulder portion and a neck portion are formed on the upper portion of the bottomed tubular container, on the outer periphery of the neck portion, on the upper end. A method for manufacturing a liquid material filling container, comprising: mounting a screw ring having a flange, bending an end edge portion of the neck portion outward in a radial direction, and winding the flange to lock the container.