JPS60222016A - Production of metal thermos - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a metal container body that forms a space between an outer cylinder and an inner container, and has an opening formed on one of the outer cylinder and the inner container, and a metal container body that has a space formed between the outer cylinder and the inner container, and a metal container body that has a space formed between the outer cylinder and the inner container. The present invention relates to an improvement in the manufacturing method of a metal thermos flask, in which a metal lid is hermetically joined to a brazing material after the space is evacuated in a true chamber heating furnace.

Conventionally, as shown in Figure 18,
(see Publication No. 6), a plurality of solid brazing materials (7) are arranged between the container body and the lid (6), and the container body and the lid (6) are separated by the brazing materials (7). Using the gap (Q) formed in the darkness, exhaust the space (4) and remove the brazing material (7).
As the container body melts, the container body is lowered by its own weight, and the molten brazing material (7) is forced to flow around the entire circumference of the opening (3).

The disadvantage of the above conventional method is that when the molten brazing material (7) is swept away by the weight of the container body, sometimes the opening (3)
A large amount of molten brazing material (7) also flows to the side, and a large amount of molten brazing material (7) flowing from the opening (3) is sealed in the chamber (4) and released from the molten brazing material (7). gas (H,,C
o, Co, etc.) remained in the sealed space (4), and the heat insulation efficiency sometimes decreased due to a decrease in true nitrogen content.

In addition, when carrying the container body into the true chamber heating furnace with the brazing material (7) and lid (6) in place, care should be taken to prevent the brazing material (7) from getting into the gap (4). However, this consideration also had the disadvantage of reducing work efficiency.

In addition, when the solid brazing material (7) melts, there is a relative positional displacement between the container body and the lid (6), so there is a drawback that it may not be possible to weld the two to the correct desired position. There is also.

The object of the present invention is to improve the method of producing the lid and the brazing material to sufficiently suppress the inflow of the molten brazing material into the space of the metal thermos flask, and thereby to reduce the degree of direct collision. To improve work efficiency by making it possible to easily arrange the lid and the brazing material relative to the main body of the container, and furthermore, to ensure an airtight connection between the container body and the lid. At the point.

The characteristic means of the manufacturing method according to the present invention is that either the container body or the lid is directly placed on the other, and the brazing material is placed near the outside of the container body and the direct placement part of the placing body. The brazing material is melted and flowed onto the direct placement section, and then cooled and solidified.

Its action is as follows.

In other words, in the past, it was thought that a large gap had to be formed between the container body and the lid in order to discharge gas from between the windows of the thermos flask, and a large gap had to be formed between the container body and the lid. It was thought that it should be placed.

However, the present invention breaks away from such preconceptions and places either the container body or the lid in direct contact with the other, and the brazing material is placed outside of the position where the two are in direct contact. When conducting an A1 verification experiment, they found that it was possible to sufficiently vent the space in the container body and achieve a good "airtight seal between the container body and the lid."

More specifically, as an example of the method of the present invention, as shown in FIG. And, as a comparative example, as shown in FIG. In addition to the brazing material (7a) arranged in the same manner as in the method shown in Fig. 5, between the outer tank bottom wall (1b) and the lid (6) in the container body, 8 or 4 brazing materials are placed in the circumferential direction of the lid (6). Place a small amount of gel-like brazing material (7b) at one or more locations to create an exhaust gap to+ for the chamber (4) of the thermos on the bottom wall of the outer tank (ib). A comparative experiment was conducted on the case where the cap was formed between the lid body (6) and the lid body (6).

As a result, even if the lid (6) is placed directly inside the container body,
As in the case where the exhaust gap (Q) is formed, the chamber (4) can be sufficiently exhausted, and in either case, the lid body (6)
After the brazing material (7) or (7a) placed on the outside of the opening (3) flows into the container main body and the direct placement part tBl of the lid (6) as it melts, the brazing material (7) or (7a) ) Circumferential rotation allows a sufficient inflow, and the container body (4) and the lid (6) are airtightly connected to each other in a state where the thermos bottle (4) is reliably sealed and is sufficiently strong; It has been discovered that the unnecessary flow of brazing material (7) into the chamber (4) can actually be prevented.

In the case of the present invention, the molten brazing material (7) is generally placed inside the container body and the direct placement part (Bl) of the lid (6).
It also enters the container body and the lid (6) due to capillary action.
) is considered to be an airtight joint.

However, the brazing material (7) does not enter the container body and the direct placement part tBl of the lid (6), and the brazing material (7) does not enter the container body and the lid (6) directly.
) may be hermetically sealed.

Moreover, since the lid (6) and the container body are placed directly on top of each other, the arrangement of the lid (6) and the inside of the container body can be done easily and quickly, and the brazing material (7) can be arranged between the chambers of the thermos bottle (4). ) It is located on the outside of the lid (6) so that there are fewer defects inside the lid (6), so it can be done easily and quickly. When transporting the brazing material (7) into the room (4), the work can be carried out easily and quickly without having to take precautions to prevent crowds from entering the room (4).

The present invention has the following effects.

According to the present invention, between the thermos chambers of the melted brazing material (7) (
4) True'i! caused by a large influx to l! Temperature reduction and brazing can prevent defects and reliably provide metal thermos flasks with excellent heat insulation performance, and furthermore, such excellent metal thermos flasks can be manufactured with good work efficiency.

Next, examples will be shown.

As shown in Fig. 1, the peripheral wall (la) of the outer cylinder 11) and the inner container (2) are hermetically welded at the mouth (Wl), and the outer cylinder (
1+ peripheral wall (la) and bottom wall (lb) with opening (3) are hermetically welded at the bottom (Wl) to form a chamber (4) between the outer cylinder 11) and the inner container (2). Manufacture the container body.

The outer surface of the inner container (2) should be subjected to a surface treatment such as copper plating in advance. Next, as shown in Fig. 2, the inner container body should be placed in an inverted position inside the heating furnace (5). At the same time, the metal IR lid fil t'' that closes the opening (3) is placed directly inside the container body. Also, the brazing material (7) is placed between the inside of the container body and the lid (6).
) is placed close to the outside of the direct placement part (former) of the space (4), and the gutter material for removing gas in the space (4) is placed on the inner surface of the lid (6), the bottom wall (1b), etc. Place it near the opening (3).

Note that the direct placement portion...) means the portion where the inside of the container body and the lid (6) come into contact.

Next, while exhausting the air in the sealed vacuum heating furnace (5) with a vacuum pump (Pl), the air is sufficient to vaporize the volatile components in the container body, the lid (6), and the brazing material (7). Raw material (7
) is heated by the heater (6) to a temperature that does not melt the inside of the furnace, and the gas in the chamber (4) is sufficiently exhausted.

Thereafter, the temperature inside the furnace is raised by the heater (6) to melt the brazing material (7), and as shown in FIG. The liquid is allowed to flow directly into the mounting portion (-) by capillary action.

Next, the brazing material (7) is cooled and solidified by lowering the temperature in the furnace, and the window space (4) of the thermos flask is sealed in a high vacuum state by brazing the inside of the container body and the lid (6).

The method of arranging the brazing material (7) can be selected as appropriate, and examples thereof will be described below.

11) As shown in Fig. 4 (a) and (b), gel-like brazing material (7) made by kneading powdery brazing material with an organic solvent is applied over the entire circumference of the lid (6) and around the outer cylinder. tl) bottom wall (l
Apply from b) over the lid body (6), brazing material (7)
By temporarily fixing the lid body (6), it is possible to prevent the molten brazing material (7) from flowing into the space (4) and the displacement of the lid body (6), and also to prevent the placement of the brazing material (7). Make it easy to do.

(2) As shown in FIGS. 5(a) and 5(b), the glue-like rows vft7) are applied intermittently in the circumferential direction of the lid (6), and on the bottom wall (lb) of the outer cylinder t1). Blood is spread over the lid body (6) from above to obtain the same effect as the method described in item 11) above, and the exhaust of the compartment (4) is made more efficient due to the action of the gap tel in the brazing material (7). Let's do it well.
Note that the size and arrangement of the gap 10) can be freely selected.

(3) As shown in Figure 6 (a) and (b), maternity leave (
6) at the circumference 1oJ and outside 1iff
In addition to a part (7a) of the gel-like brazing material placed on the bottom wall (ib) of l (l) and the lid 161, the gap between the brazing material (7a) (partially located outside of Q) is Then, in a state slightly separated from the soldering material (7a) and the lid (6), apply the remaining part of the glue-like soldering material (7b) to the bottom wall (lb), and follow the steps in item (2) above. In addition to obtaining the same effect as the method, uniform flow of the molten brazing material (7) into the entire direct placement part fB+ is made more reliable by the action of the outer brazing material (7b).

Note that the number and arrangement of gaps (Q) can be changed freely.

(4) As shown in Figure 7 (a) and (b), the outer cylinder tl
The bottom wall (1b) of the + has an annular protrusion (
1O), and then the glue-like brazing material (7) is placed around the entire circumference of the lid (6) and slightly away from the end of the lid (6), and then the annular protrusion ( It is possible to prevent the molten brazing material (7) from flowing into the chamber (4), to facilitate the placement of the brazing material (7), and to prevent the harmful effects of the brazing material (7). To efficiently exhaust air between rooms (4) without having to do so.

(6) As shown in Figure 8 (a) and (b) fc, the fish body t
61, the end (6a) is bent away from the bottom wall (1b) on the end side, and the brazing material (7) is set in the same manner as in the method of item (4) above. , the same effect as the above method (4) can be obtained, and the flow of the molten brazing filler metal (7) into the directly placed area is controlled by the bottom wall (1b) and the lid (6).
A gap (C
1 will make it even more reliable.

(6) As shown in Figure 9 (a) and (b), the bottom wall (
ib) and the lid body (6) directly to the mounting part IBI.
The lid (6) side is bent to form a gap (0) on the outside, and the lid (6) is lowered on the outside of the lid (6). Then, the brazing material (7) is arranged in the same manner as in the method (4) above, so that the same effect as in the method (5) above can be obtained.

(7) As shown in Figures 1θ (a) and (b), place the annularly molded brazing material (7) on the lid (6) with the outer peripheral part protruding, and The same effect as the method in section (4) can be obtained.

(8) As shown in Fig. 11 (a) and (b), a brazing material (7) formed into a shape in which a part of the circumferential direction of the annular body is notched is processed in the same manner as in the method of item (7) above. , and the lid body (6) is positioned by the inclined part (11) with the outer peripheral part being positioned by the inclined part (11) of the bottom wall (1b).
By placing the brazing material (7) on the top, the same effect as the method of item (7) above can be obtained. ) between the chambers (4) can be more efficiently evacuated by the action of the gap (Q).

(9) As shown in FIGS. 12(a) and 12(b), the soldering material (7) molded into a shape having a notch (8) in a part of the inner peripheral edge of the annular body is ) is arranged in the same way as the method in item (8) above to obtain the same effect as in the method in item (8) above.

(lO) As shown in Fig. 18 (a) and (b), brazing material (7) is molded into a ring-shaped body with holes (9).
is set in the same manner as in the method (8) above, so that the same effect as in the method (8) above can be obtained.

(lO As shown in Figure 14 (a) and (b), the bottom wall (
lb) on the Sekiguchi (3) side of the annular protrusion (10),
The opening (3) side is formed to have a lower sloped portion, and the lid (6) is bent in the same manner as in the method (5) above, The brazing material (7) is placed in the same manner as the method in item (4) above, and the same effect as in the method in item (5) above can be obtained, and the lid body (6) can be easily placed in the predetermined position. It can be so.

(I2) As shown in Fig. 15 (a) and (b), with the fish body (6) positioned by the inclined part (11) of the bottom wall (lb), the gel-like wax material (7) is placed. Lid body (6)
The molten brazing material is disposed on the top of the lid (6) intermittently in the circumferential direction and protruding from the lid (6), and the same effect as in item (2) above can be obtained. (7) can be flowed directly into the placing part tBl more reliably, and the lid body (6
) to ensure that it is in place. Note that the gap (the number and arrangement of O20 can be changed freely).

11$ As shown in Figures 16 (a) and (b), the bottom wall (lb) is attached to the lid (6) on the outside as well as the lid (6).
The sides are bent to form a lower sloped portion (l), and the soldering material (
7), the same effect as the method described in item (4) above can be obtained, and the molten brazing material (7) can flow more reliably into the direct placement part 181, and the lid body ( 6) to ensure that it is placed in a predetermined position.

(14) As shown in FIGS. 17(a) and (b), a groove 02 is formed in the bottom wall (1b), one end of which is connected to the opening (3), and the other end of which is located outside of the lid (6). ) is formed, and the brazing material (7) is placed in the same manner as in the method (4) above, and the same effect as in the method (4) above can be obtained. ) to make the exhaust more efficient.

The outer cylinder 11) and the inner container (2) can be changed as appropriate in terms of shape, dimensions, material, etc., and the opening (
3) and the lid (6) can also be freely changed in terms of shape, dimensions, material, etc. Further, the position of the opening (3) can be changed appropriately, such as by changing the shape of the inner container (2).

The material of the raw material (7) can be appropriately selected from niggle, aluminum, #L, baladicum, steel, etc., and the material can be gel-like, solid, powder-like, or amorphous. , in the placement method, application.

Placed! It may be attached or otherwise. In addition, in some or all of the materials, properties, and arrangement methods,
Different types may be appropriately combined. Especially the 11th
As shown in the figures to FIG. 18, the brazing material (7) is formed in the same shape so as to be positioned by the bottom wall (1b), and the exhaust notch +C1, (gl, (9)) is formed in the brazing material (7). 7), a brazing material (7) which is excellent in workability, improved exhaust efficiency, etc. can be obtained.

The specific configuration of the vacuum heating furnace (5) is an exhaust configuration.

Various changes can be made in the heating configuration and others.

It is also possible to place the container body (4) directly on the lid (6).

[Brief explanation of the drawing]

1 to 17 show examples of the present invention, FIG. 1 is a longitudinal sectional view of the container body, FIG. 2 is a schematic diagram showing the processing state in a true chamber heating furnace, and FIG. 8 is a diagram showing the container body and Detailed views of the flow of molten brazing material into the space between the lids, and FIGS. 4 to 17 show different arrangements of the brazing material. In each figure, (a) is a plan view, and (b) is a cross-sectional view. It is a diagram. FIG. 18 is an explanatory diagram of a conventional example, and FIG. 19 shows a brazing material arrangement state of a comparative example, where (a) is a plan view and (b) is a sectional view. if)...Outer cylinder, (2)...Inner container,
(3)...Sekiguchi, (4)...Koma, (
6)・・・・・・Heating furnace, (6)・・・Lid, (7)(7a), (7b)・・・Brazing material,
(8)...Exhaust notch, (9)...
Exhaust hole, (10)... Annular protrusion, (11).
...Nuchal needle part, prisoner ... Container base salary, tBl
...Direct placement part, fil...Gap. Agent Patent Attorney Osamu Kitamura

Claims (1)

[Claims] ■ A metal member in which a space (4) is formed between the outer cylinder (11 and the inner container (2)), and an opening (3) is formed in one of the outer cylinder +11 and the inner container (2). The container body (5) and the opening (
3) and a lid made of gold lI4 (6) for closing the chamber are airtightly joined to the brazing material (7) after the space (4) is evacuated in the true chamber heating furnace (5). A method in which one of the container body (5) and the lid (6) is placed directly on the other, and the container body and the lid (6) are placed directly on each other! The brazing material (7) is placed near the outside of the brazing material (7) with respect to the direct mounting portion (B) by melting the brazing material (7).
A method for manufacturing a metal R-method bottle, in which the metal R-method bottle is allowed to flow into the water and then cooled and solidified. (2) The manufacturing method according to claim 0, wherein the brazing material (7) is arranged around the circumference of the lid (6) with a gap (C) in a part thereof. ■ A part (7a) of the brazing material (7) is attached to the lid (6).
The remaining part (7b) of the brazing material (7) is placed around the circumference of the brazing material (7) with a gap (C) in a part thereof, and the remaining part (7b) of the brazing material (7) is placed in a part (7a) of the brazing material outside the gap (C). ) The manufacturing method according to item 0 of the range at the end of the special I\Fi range. (1) An annular protrusion (lO) is formed on the container body (4) at an outer side and higher than the lid (6), and the lid (lO) is formed inside the annular protrusion (lO). 6) The manufacturing method according to claim 0, wherein the brazing material (7) is placed apart from the brazing material (7). (i) tilting the inside of the container body so that the lid (6) side is lower than the lid (6);
The manufacturing method according to item 0, wherein the sloped portion (U) K of the brazing material (7) is arranged within the container body. ■ Between the container main body and the lid (6), a gap lot is formed outside the direct placement part tBl, through which the brazing material (7) is melted and flows. The manufacturing method according to item 0. ■ The front ε container body (4) is tilted near the outside of the lid (6) so that the lid (6) side is lower; The inclined part of the main body (by the lid 1)
6) The manufacturing method according to claim 0, which performs the positioning. (2) The manufacturing method according to claim 0, wherein the brazing material (7) is formed into a shape in which a part of the circumferential direction of an annular body is notched. (2) The manufacturing method according to claim 0, wherein the brazing material (7) is formed into an annular shape.゛ [Co., Ltd.] The manufacturing method according to item (2), in which the brazing material (7) is placed on the lid (6) with its outer peripheral portion protruding from the lid (6). . (2) The manufacturing method according to claim (1), characterized in that an exhaust notch (8) is formed in the brazing material (7). @ Exhaust hole (9) that passes through the brazing material (7) above and below
Scope of special FfF ice forming process