JPH0415687B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to the structure and manufacturing method of a vacuum double bottle made of metal such as stainless steel, used in magic bottles, etc. The present invention provides a metal vacuum double bottle with excellent performance.

Conventional technology Conventionally, metal vacuum double bottles have been known, which consist of an inner tank body and an outer tank body made of metal such as stainless steel, and in which the space between the inner tank body and the outer tank body is evacuated. It has become widely used in recent years because it has excellent heat retention performance and does not have the risk of breaking like glass vacuum double-sided bottles.

This metal vacuum double bottle has a considerable degree of heat retention performance due to its structure, but it is not necessarily sufficient, and in order to further improve its heat retention performance,
Various improvements have been made. One way is to
The outer surface of the inner tank body is plated with silver or copper.Another method is to insert a stainless steel reflector between the outer tank body and the inner tank body. Furthermore, super insulation is also known, in which the space between the outer tank body and the inner tank body is filled with glass wool and aluminum foil alternately wound in several layers.

Problems to be Solved by the Invention Among the above methods, there are two methods for plating silver or copper: electrolytic plating method and electroless plating method.
Both methods are excellent methods that greatly improve heat retention performance, but on the other hand, they have poor productivity and are expensive. Also, the method of installing a stainless steel reflector is as follows.
Although it has good productivity and can be provided at low cost, it has a higher copy rate than aluminum or copper, so its heat retention performance does not improve much.

Super insulation is even better than the previous two methods in terms of heat retention, but it is extremely expensive and has the disadvantages of making the product heavy, so it is not suitable for magic bottles. It cannot be said that the vacuum double bottle used is necessarily excellent.

The present invention was made in view of the above circumstances, and it is an object of the present invention to provide a metal vacuum double bottle that has excellent heat retention performance, good productivity, and can be provided at low cost. .

Means for Solving the Problem The first invention of the present application is an invention of the structure of a metal vacuum double bottle, which is composed of an inner container body and an outer container body made of metal, and the inner container body and the outer container body are made of metal. In a metal vacuum double bottle, which has a vacuum in the space between it and the outer tank body,
It is characterized in that the outer surface of the inner tank body is covered with a thin plate of aluminum or copper.

FIG. 1 shows a metal vacuum double bottle of the present invention. In FIG. 1, 1 is an inner tank body, and 2 is an outer tank body, the inner tank body 1 is inserted into the outer tank body 2, and the inner tank body 1 and the outer tank body 2 are mutually connected at the mouth part 3. It is welded. Further, a tip pipe 4 is provided at the bottom of the outer tank body 2, and the air in the space 5 between the inner tank body 1 and the outer tank body 2 is evacuated from the chip pipe 4 to create a vacuum. The vacuum is maintained by pinching the tip tube 4.

The outer surface of the inner tank body 1 is covered with a thin plate 6 of aluminum or copper. The thin plate 6 is a foil having a thickness of about 10 to 100μ, and this foil is attached to the inner tank body 1.
The outer surface of the inner tank body 1 is covered by wrapping it around the outer surface of the inner tank body 1.
Further, instead of wrapping the thin plate 6 with foil, it is also possible to form a bottomed sleeve molded to match the outer shape of the inner tank body 1 and to fit this into the inner tank body 1.

When covering the inner tank body 1 with this thin plate 6, when exhausting air from the tip pipe 4 of the outer tank body 2 in a later manufacturing process,
In order to prevent the thin plate 6 from being sucked in and stuffing the chip tube 4, or from contacting the thin plate 6 with the outer tank body 2, as shown in FIG. It is preferable not to cover the position facing the tube 4 with the thin plate 6.

The second invention of the present application is a method for manufacturing the metal vacuum double bottle, and is a method for fixing the thin plate 6 to the inner tank body 1 during the manufacturing process. Accordingly, the present invention involves inserting a metal inner tank body into a metal outer tank body, welding the openings of the inner tank body and the outer tank body, and heating the whole while heating the chips provided in the outer tank body. A method for manufacturing a metal vacuum double bottle, in which a vacuum is created in a space between an outer tank body and an inner tank body by evacuation from a pipe, and then the tip pipe is closed to maintain the vacuum. Before inserting the tank body into the outer tank body, the outer surface of the inner tank body is covered with a thin aluminum or copper plate, and a brazing material is applied between the thin plate and the inner tank body or at least one of the overlapping parts of the thin plates. Between the
The present invention is characterized in that the inner tank body and the thin plates or the overlapping margins of the thin plates are brazed with the brazing material using the heat generated during the exhausting.

When manufacturing a metal vacuum double bottle, a metal inner tank body 1 and an outer tank body 2 are formed separately, and the inner tank body 1 is inserted into the outer tank body 2. and outer tank body 2
The mouth part 3 of the outer tank body 2 is welded, and the entire body is heated to expel the gas adsorbed on the metal surfaces of the inner tank body 1 and the outer tank body 2, while exhausting from the chip pipe 4 provided at the bottom of the outer tank body 2. Then, the space 5 between the inner tank body 1 and the outer tank body 2 is evacuated, and then the tip tube 4 is pinched off and closed.

Here, in the present invention, the inner tank body 1 is replaced with the outer tank body 2.
A thin plate 6 is attached to the outer surface of the inner tank body 1 prior to insertion into the inner tank body 1.
Wrap around. At this time, in the second invention, as shown in FIG. Insert. Then, the inner tank body 1 wrapped with the thin plate 6 is inserted into the outer tank body 2, the mouth part 3 is welded, and the inner tank body 1 and the outer tank body 2 are evacuated from the tip tube 4 while heating. A vacuum is created between them, and the heat is used to braze the inner tank body 1, the thin plates 6, and the overlapping margins of the thin plates 6.

In the present invention, the brazing may be performed between the inner tank body 1 and the thin plate 6 or at least one of the overlapping margins of the thin plates 6, but as shown in FIG. By attaching the thin plate 6, it is possible to integrally fix the thin plate 6 to the inner tank body 1 and prevent the end of the thin plate 6 from being rolled up.
preferable.

Effect In the first invention of the present application, since there is a vacuum between the inner tank body 1 and the outer tank body 2, there is no heat transfer due to convection and conduction, and the inner tank body 1 has a good shielding performance for radiant heat. Since it is covered with a thin plate 6 made of high-quality aluminum or copper, the radiant heat from the inner tank body 1 is transferred to the thin plate 6.
The heat is reflected by the heat source and does not reach the outer tank body 2, and the transfer of heat due to radiation is significantly reduced.

Further, in the second invention, a solder material 7 is provided in the inner tank body 1.
The thin plate 6 is wrapped around the thin plate 6, and the solder material 7 is melted by the heat generated during exhaust, and the melted braze material 7 brazes the inner tank body 1 and the thin plate 6, or the overlapping margin of the thin plates 6. However, peeling of the thin plate 6 from the inner tank body 1 and curling of the edge of the thin plate 6 can be prevented.

Effects of the Invention According to the present invention, the heat transfer due to radiation is significantly reduced by the thin plate 6, so that the heat retention performance of the magic bottle is significantly improved. In the experimental results,
The storage performance was comparable to that of a vacuum double-sided bottle whose outer surface was silver-plated, and it was extremely excellent as a vacuum double-sided bottle for magic bottles. Furthermore, since the outer surface of the inner tank body 1 is simply covered with a thin plate 6 of aluminum or copper, the manufacturing process is extremely simple, the productivity is high, and the manufacturing process is inexpensive.

Further, according to the method of the second invention, the thin plate 6 is firmly brazed to the inner tank body 1 in the vacuum double-bottom bottle, and the thin plate 6 may peel off from the surface of the inner tank body 1 or the end may curl up. There is nothing like that. Therefore,
Since the thin plate 6 does not come into contact with the outer tank body 2, it is possible to prevent heat transfer due to thermal conduction, and the metal vacuum double bottle has uniform heat retention performance without variations in heat retention performance. Obtainable. Further, since the thin plate 6 is soldered by heat generated during exhaust, no special process for soldering is required, and an increase in cost can be avoided.

Embodiment FIG. 3 shows an embodiment of the metal vacuum double bottle of the present invention. In this example,
A plurality of slits 8 are formed in the thin plate 6. According to this embodiment, gas molecules adsorbed on the surface of the inner tank body 1 during exhaust are effectively discharged through the slit 8. Therefore, gas molecules remain between the inner tank body 1 and the thin plate 6, and the heat retention performance does not deteriorate during use.

FIG. 4 shows another embodiment of the metal vacuum double bottle of the present invention. In this embodiment, the thin plate 6 is a bottomed sleeve lacking the center of the bottom, and a plurality of small protrusions 9 are provided on the entire surface thereof to protrude inwardly from the thin plate 6. It is supported by the inner tank body 1 by small protrusions 9.

In the metal vacuum double bottle shown in Fig. 1, the thin plate 6 closely covers the inner tank body 1, so when hot water is poured into the inner tank body 1, the temperature of the hot water changes due to heat conduction. It is transmitted through the body 1 and immediately to the thin plate 6,
The thin plate 6 has the same temperature as the inner tank body 1. Therefore, the radiant heat from the inner tank body 1 is reflected by the thin plate 6, but the radiant heat is also radiated from the thin plate 6, and a small amount of the heat leaks out from the outer tank body 2. On the other hand, according to this embodiment, the thin plate 6 has a gap of 1 with respect to the inner tank body 1.
The thin plate 6
Since the temperature of the thin plate 6 does not rise, heat transfer due to radiation from the thin plate 6 can be prevented, and the heat retention efficiency is further improved.

[Brief explanation of drawings]

FIG. 1 is a central longitudinal cross-sectional view of the metal vacuum double bottle of the present invention. FIG. 2 is a cross-sectional view of a state in which a thin plate is wrapped around an inner container body with a solder material sandwiched between them during the manufacturing process of the metal vacuum double bottle of the present invention. FIG. 3 is a front view showing the outer tank body in longitudinal section at the center, showing an embodiment of the metal vacuum double bottle of the present invention. FIG. 4 is a front view showing another embodiment of the metal vacuum double bottle of the present invention, showing the outer tank body in a central vertical section and the thin plate in a half-cut section. FIG. 5 is an enlarged sectional view of the small protrusion in the embodiment of FIG. 4. 1... Inner tank body, 2... Outer tank body, 3... Mouth part, 4
... Chip tube, 5 ... Blank space, 6 ... Thin plate, 7 ...
Brazing material, 8...Slit, 9...Small protrusion, 10...
gap.

Claims (1)

[Scope of Claims] 1. A metal vacuum double bottle consisting of a metal inner tank body and an outer tank body, in which a space between the inner tank body and the outer tank body is evacuated. A metal vacuum double bottle characterized by having the outer surface of the tank body covered with a thin plate of aluminum or copper. 2. Claim 1, characterized in that a portion of the inner tank body that is not covered with the thin plate is formed at a position facing the tip tube provided in the outer tank body.
Metal vacuum double bottle as described in section. 3. The metal vacuum double bottle according to claim 1, characterized in that a plurality of slits are formed in the thin plate. 4. The thin plate is provided with a slight gap between it and the outer surface of the inner tank body, and is supported with respect to the inner tank body by a plurality of small protrusions formed on the thin plate so as to protrude inwardly. A metal vacuum double bottle according to claim 1, characterized in that: 5. Insert the metal inner tank body into the metal outer tank body, weld the openings of the inner tank body and the outer tank body, and heat the whole body while exhausting the air from the chip pipe provided in the outer tank body. In the method for manufacturing a metal vacuum double bottle, in which a space between a tank body and an inner tank body is evacuated, and then the tip tube is closed to maintain the vacuum, the inner tank body is replaced with an outer tank body. Before inserting the inner tank, the outer surface of the inner tank is covered with a thin plate of aluminum or copper, and a solder material is inserted between the thin plate and the inner tank or at least in the overlap between the thin plates. A method for producing a metal vacuum double bottle, characterized in that the inner tank body and the thin plate or the overlapping margin of the thin plates are brazed with the brazing material using the heat of time.