JPH0794275B2 - Method for manufacturing sealed container - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a hermetically-sealed container, and more specifically, after the contents are stored in the container, the opening can be easily sealed in the sealing step, and the sealing property can be improved. The present invention relates to a method for manufacturing an excellent sealed container.

2. Description of the Related Art Conventionally, as a method for manufacturing a hermetically sealed container, there has been a manufacturing method in which a lid is placed on the opening of the container and the outer peripheral edge of the lid and the opening of the container are integrally wound. FIG. 7 is a drawing showing a cross-sectional view of a container wound by such a method.
In FIG. 7, reference numeral 50 denotes a container body, and a lid 51 is placed on the opening 50a of the container body 50. The outer peripheral edge of the lid 51 and the opening 50a of the container body 50 are integrally formed. It was wound up.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, such an invention has the following drawbacks.

(1) When the diameter of the container body 50 is small (for example, in the case of a container having a diameter of 30 mm or less), it is difficult to integrally wind the container body and the lid body together in the manufacturing process.

(2) Especially in a container having a ring shape, it has been impossible to simultaneously fasten the outer peripheral edge or the inner peripheral edge of the lid around the outer edge and the inner edge of the opening of the container body.

(3) In the case where the inside of the container body 50 has a high pressure instantaneously, the winding lid has a difficulty in sealing.

Means for Solving the Problem In order to solve this problem, the present invention provides an annular collar 2 of a lid 1.
After applying the bonding agent 3 to the inner surface, the annular collar 2 of the lid 1 is placed in the opening 5 of the container body 4, and then the mold 7 connected to the press 6 is lowered onto the lid 1. First, the tip of the lid pressing punch 8 of the die 7 is brought into contact with the central portion 12 of the lid body, the rising wall 2a of the annular collar 2 is joined to the inner wall 5a of the opening of the container body 4, and then the sandwiching die 9 is attached. Abut on the bent wall 2b of the annular collar 2,
A method for manufacturing a hermetically sealed container, characterized in that the bent wall 2b is forcibly joined to the outer wall 5b of the opening of the container body 4, and the annular collar 2 is sandwiched and fixed in the opening 5. The bonding agent 3 is an adhesive agent, a lining agent, or packing, and the knockout punch 10 is provided in the cylinder 11 of the mold 7.
And the tip of the knockout punch 10 is brought into contact with the upper surface of the lid 1 to separate the container body 4 from the mold 7. Further, the opening 5 of the container body 4 is closed. After being sealed with the lid 1, the sandwiching portion 15 is bent inside the container body 4.

Actions and Examples First, an apparatus used for container sealing work and a structure of a container to be sealed will be described based on Examples. In Figure 1,
6 is a press machine that operates by hydraulic pressure, etc.
A ring-shaped mold 7 that moves up and down above the container body 4 and the lid 1 is attached to the lower side. In the example,
The die 7 is composed of a ring-shaped lid pressing punch 8, a sandwiching die 9 and a knockout punch 10. A lid pressing punch 8 is slidably inserted into the sandwiching die 9, a spring body 13 is incorporated above the lid pressing punch 8, and a flange portion of a knockout punch 10 is placed on the spring body 13. Has been done. The knockout punch 10 is configured to slide in the lid pressing punch 8 against the spring body 13 by compressed air.
Compressed air is supplied to a cylinder 11 provided above the knockout punch 10 through an air supply pipe 14. Cylinder 11
Is an air cylinder or a hydraulic cylinder.

Next, the structure of the sealed container will be described. In FIG. 1, the container body 4 is a ring-shaped container having a hollow central portion. On the opening 5 of the container body 4, a lid 1 having an annular collar 2 whose inner surface is coated with an adhesive, a coating agent, etc. is placed. The opening 5 is sandwiched between the annular collars 2, and the container body 4 is completely sealed by the lid 1. As a material for the container body 4 and the lid 1, a metal such as aluminum, a synthetic resin material, or the like is used.

Further, a method for manufacturing the hermetically sealed container according to the present invention will be described. As shown in FIG. 2, the lid 1 in which the bonding agent 3 is applied to the inner surface of the annular collar 2 is placed on the opening 5 of the container body 4. As the bonding agent 3, a polyester-based adhesive, a nylon-based adhesive, a two-component adhesive, a rubber-based coating agent, or the like can be used, and packing such as rubber may be used as necessary. Next, the press machine 6 is operated to lower the mold 7 on the lid 1 and the container body 4. As shown in FIG. 3, first, the tip of the lid pressing punch 8 of the die 7 contacts the central portion 12 of the lid. Then, since the central portion 12 of the lid body is fixed to the opening portion 5 of the container body 4 and, at the same time, the outer periphery of the lid pushing punch 8 contacts the rising wall 2a of the annular collar 2.
The rising wall 2a is bonded to the opening inner wall 5a via the bonding agent 3. Thereafter, as shown in FIG. 4, the lid pressing punch 8 holds the above state, and then the sandwiching die 9 descends to move the sandwiching die 9
The concave portion 9a of the ring abuts on the bent wall 2b of the annular collar 2. Then, the bent wall 2b is forcedly attached to the outer wall 5b of the opening of the container body 4 with the bonding agent 3
Are joined through. In this way, the annular brim 2 is sandwiched between the lid pressing punch 8 and the sandwiching die 9 and securely sandwiched in the opening 5. The lid pressing punch 8 and the sandwiching die 9 may be heated as needed. When the sealing work is completed,
As shown in FIG. 5, the lid pressing punch 8 and the sandwiching die 9 are both raised. At this time, from the air supply pipe 14 into the cylinder 11,
Compressed air is supplied, the knockout punch 10 moves downward in the lid pressing punch 8, and the tip of the knockout punch 10 presses the lid central portion 12 downward. Then, the container fitted in the mold 7 is forcibly dropped. When the pressure in the container body 4 instantly becomes high, the method for manufacturing the hermetically sealed container is as follows:
As shown in the figure, the holding portion 15 of the container body 4 is
Just fold it inside. As a result, the clamping force of the lid body 1 on the container body 4 is further strengthened and the sealing performance is improved.

It should be noted that the container body 4 and the lid body 1 are, as shown in the embodiment, not only in the case of having a ring shape, but also of a normal cylindrical shape,
It can also be used as a method for manufacturing a sealed container such as a rectangle.

Effects As described above, according to the present invention, particularly in the case of a container having a small diameter, the work of sealing the opening of the container with the lid is very simple. Further, in the case of a container having a ring shape, the outer peripheral edge and the inner peripheral edge of the lid can be simultaneously sandwiched between the outer peripheral edge and the inner peripheral edge of the opening of the container main body, so that the sealing operation is simple. And the container has an excellent hermeticity.

[Brief description of drawings]

1 to 6 are drawings showing an embodiment of a method for producing a hermetically sealed container according to the present invention, and FIG. 1 is a sectional view showing the structure of an apparatus and a container used for hermetically sealing work, and FIG. Figure ~
FIG. 5 is a sectional view showing the order of the method for manufacturing a hermetically sealed container, FIG. 6 is a sectional view showing another embodiment of the method for manufacturing a hermetically sealed container, and FIG. 7 is a sectional view of a container by a conventional manufacturing method. Is. 1 ... Lid, 2 ... Annular collar 2a ... Standing wall, 2b ... Bending wall 3 ... Bonding agent, 4 ... Container body 5 ... Opening part, 5a ... Opening inner wall 5b ... Opening Outer wall, 6 …… Press machine 7 …… Mold, 8 …… Lid pushing punch 9 …… Clamping type, 10 …… Knockout punch 11 …… Cylinder, 12 …… Cover central part 15 …… Clamping section

Claims (4)

[Claims] 1. After applying a bonding agent to the inner surface of the annular collar of the lid, the annular collar of the lid is placed in the opening of the container body, and then a mold connected to a press is placed on the lid. Then, the tip of the lid pressing punch of the die is first brought into contact with the central portion of the lid to join the rising wall of the annular collar to the inner wall of the opening of the container body, and then the sandwich die is bent into the bent wall of the annular collar. The method for producing a hermetically sealed container, wherein the bent wall is forcibly joined to the outer wall of the opening of the container body, and an annular collar is sandwiched and fixed to the opening. 2. The method for producing a hermetically sealed container according to claim 1, wherein the bonding agent is an adhesive, a lining agent, or packings. 3. The knockout punch is lowered in the cylinder of the mold, and the tip of the knockout punch is brought into contact with the upper surface of the lid to separate the container body from the mold. Method for manufacturing sealed container of. 4. The method for producing a hermetically sealed container according to claim 1, further comprising sealing the opening of the container main body with a lid and bending the sandwiching portion inside the container main body.