JPS59200616A - Metal vacuum double container - 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 Technical Field The present invention relates to a metal vacuum double-walled container having heat insulating properties formed by a metal vacuum double-wall.

BACKGROUND OF THE INVENTION In this type of container, several parts of the vacuum double wall forming the container are hermetically joined by welding or brazing to form a metal vacuum double container in a desired shape. In order to seal the double walls forming a container in a predetermined vacuum state, a so-called batch method is used, in which the final joint of the double walls is brazed in a vacuum space that has reached a predetermined degree of vacuum. In particular,
Since it is difficult to work while handling the objects to be welded, the only option was to heat the double-walled structure with the brazing material interposed between the surfaces to be welded and the surfaces to be welded by leaving them in a vacuum space. 5
2-133162).

In the case of a metal vacuum double container that is vacuum-sealed in this way,
Partial joint failure is sometimes observed in the brazed joints left unused, and the heat insulating effect may be lost during the manufacturing stage or early after use. This means that when the filler metal interposed in the joint melts, the joint surface with the solid filler metal in contact with the surface to be joined is in the correct position relative to the surface to be joined when the solid filler metal is melted. This is thought to be due to the fact that it has become loose and settled, and has been bonded.

Purpose This invention provides a metal vacuum double container which can solve the conventional drawbacks in the case of final soldering by the batch method, for example, by improving the joint structure of the metal vacuum double container. The purpose is to provide

Structure/Operation In the present invention, a double-walled brazed joint portion surrounding a vacuum space has one surface to be joined that includes a molten solder storage recess at least in part, and the other surface to be joined that is aligned with the surface to be joined. It is assumed that the wire is soldered between the wire and the wire.

The molten solder storage recess is used to store the heated and melted brazing material that is interposed between the surfaces to be joined and the surfaces to be joined during joint brazing until all of the brazing material is melted and the surfaces to be joined are brought together. And even after joining together, along the molten wax storage recess,
Therefore, the flow is spread along a predetermined area. By including such a molten solder storage recess in at least a small part of the surface to be joined, the surface to be joined and the predetermined area of the surface to be joined, which are simply left as they are, are , the molten wax will rotate reliably without manual adjustment work. In addition, the surface to be joined has a non-planar shape that includes four molten solder reservoirs, and the surface to be joined to it also has a non-planar shape that matches the surface to be joined, so both surfaces are filled with brazing filler metal. When they come together as they melt, even if there is a slight positional shift between them, they will guide each other and settle into the alignment position and position without manual adjustment.

Such a joining structure is applied, for example, to a final soldering part by a batch method, and preferably the molten solder storage recess is formed continuously over the entire length of the surfaces to be joined in the soldering part to which it is applied. be done.

Further, in the case of final soldering by a batch method, for example, the surface to be joined is formed around the bottom opening of a double vacuum container made of metal, and the joining surface is formed around the outer periphery of a lid plate that closes the opening. This makes it difficult for the final soldering part of the metal vacuum double container to be damaged in appearance by the batch method, and it becomes easier to cover the soldering part with a suitable plate material or the like.

Embodiment The embodiment shown in FIGS. 1 to 4 is a metal vacuum double container with a vacuum double wall, with a vacuum space 3 between an inner container 1 and an outer container 2 made of stainless steel. is shown as a portable moisturizing bottle. The inner container 1 is formed by welding and joining 4 a lower half 1a and an upper half 1b, which are press-formed products, and the lower half 1a can withstand normally expected external forces such as adding ice or hitting a cleaning tool. On the other hand, the upper half 1b is made of a thinner plate than the lower half 1a, partly because it does not receive much external force, and is designed to prevent heat conduction from the bottom to the mouth. In addition to suppressing heat dissipation due to heat dissipation, weight reduction and material cost savings are being achieved.

The outer container 2 also has a lower half 2a and an upper half 2 that are press-molded products.
b and are welded together 4, and together with the inner container 1, it is possible to reduce the product cost by reducing the number of molding steps and number of unit components. Since both the lower half 2a and the upper half 2b receive similar external forces, they are formed of a plate material that is the same or slightly thicker than the lower half 1a of the inner container.

The inner container 1 and the outer container 2 are welded together 4 between their mouths.
It is integrated into a bottle-shaped metal container with double walls (1, 2). The outer container 2 has an opening 5 at the center of its bottom.
The opening 5 is closed by the lid plate 7 by a soldering table 9 between the surface 6 to be joined around the opening 5 and the joint surface 8 on the outer periphery of the lid plate 7 made of stainless steel that closes the opening 5, The space between 1° and 2 double walls is sealed. The soldering table 9 is used in a vacuum chamber where a predetermined degree of vacuum has been reached for the double-walled metal container having the double-walled 1 and 2 walls after each welding 4 has been completed.)
A vacuum space is provided between the sealed double walls 1 and 2.

The surface to be joined 6 has an annular molten solder storage recess 10 that is continuously formed over the entire length of the surface to be joined between the corner portion of the recessed portion 12 in which the opening 5 is formed at the bottom of the outer container 2. It is formed into a conical surface connected to the bottom of the recess 10 so as to have a part thereof. Furthermore, the joint surface 8 is formed into the same conical surface that closely matches the surface 6 to be joined.

The soldering 9 between each joining surface 6.8 is performed by attaching a metal container with a double wall 1, 2 structure to a second
It is installed upside down as shown in the figure, and placed on the four molten solder storage parts 10, with sliced, pelleted, or paste solder material 11 equally distributed, and on top of that is a lid plate with the joint surface 8 facing downward. 7 is placed thereon as shown in FIG. 3, and then the brazing filler metal 11 is melted by heating the container installation space while maintaining a predetermined degree of vacuum. The brazing filler metal 11 melted at this time is
While being melted, the flow spreads along the molten solder storage recess 10 until and even after the υ surface contact surfaces 6 and 8 come together due to all the melting, and the surface contact surfaces 6 and 8 Since the molten solder in the recess 10 is forced into the space between the recesses 10 and further expanded without being lost to others, it flows almost uniformly between the contact surfaces 6°8 as shown in Fig. 4, and the overall Of course, no bonding failure occurs even locally.

In the embodiment shown in FIGS. 5 and 6, the molten wax storage recess 10 is a recess 12 in which the opening 5 at the bottom of the outer container 2 is provided.
is formed in an annular shape at the center of the bottom width direction, and the surface to be joined 6 is formed of a plane that connects the recess 10 to the inner peripheral side of the recess 10, and the surface to be joined 8 is thus aligned with the surface to be joined 6. It is said to be the shape. FIG. 5 shows the state before soldering, and FIG. 6 shows the state after soldering. A shallower large-diameter recess 21 is formed on the outside of the recess 9.
A decorative lid 22 made of a suitable material such as synthetic resin, metal, or cork is attached to the bottom of 1 by gluing or the like, and hides the soldered joint 1 9.

In the embodiment shown in FIG. 7, brazing material device positioning portions 10a, which are partially expanded laterally, are formed at equal number of locations in the molten solder storage recess 10. This positioning part 1
0a serves as a positioning part when placing the brazing filler metal 11 in the recess 10 during soldering, and prevents unevenness in the entire soldering condition due to uneven placement of the brazing filler metal 110 and movement of the placed brazing filler metal 11. prevents and guarantees the stability of the soldered lid plate. Furthermore, it is possible to make a comparison at a glance using the concave portion 10 of the placed brazing material 11.
To prevent shortage or excess of brazing filler metal 11.

In the above embodiment, only a bottle-shaped container is shown, but it goes without saying that other containers such as flattened lunch boxes may be used.

Effects According to the present invention, a double-walled brazed joint portion surrounding a vacuum space has one surface to be joined that includes the molten solder storage recess at least in part, and the other surface that is aligned with the surface to be joined. Since the solder is soldered to the surface, the molten solder storage recess will spread the molten solder to a predetermined area, and the non-planar surface with the molten solder storage recess in a part and its alignment. Due to the posture and positioning action between the joint surfaces, it is possible to detect uneven filling of the filler metal without manual adjustment, or parts of the solder metal may have been washed away, or the positional relationship or posture of both joint surfaces may be incorrect. Poor bonding due to improper contact is prevented.

[Brief explanation of drawings]

Figure 1 is a longitudinal cross-sectional view of one embodiment, and Figures 2 to 4 are the first embodiment.
5 and 6 are partial sectional views showing the full state of soldering in another embodiment. FIG. 7 is a partial sectional view showing the full state of soldering in another embodiment. FIG. 3 is a partially sloped view showing an example. 1.2... double wall, 3... vacuum space, 5... opening, 6... surface to be joined, 7... cover plate, 8... joint surface,
9... Brazing joint, IO... Molten solder storage recess, 1
1... Wax analysis applicant Tiger Thermos Co., Ltd.

Claims (1)

[Scope of Claims] (1) A double-walled brazed joint surrounding a vacuum space includes at least a portion of the molten solder reservoir four parts, and is aligned with the welded surface. (2) The soldering part is the final soldering of the metal vacuum double container made in a vacuum space. (3) The metal vacuum double container according to claim 1, wherein the soldering part is located at the bottom of the container, the surface to be joined is formed on the opening surface of the bottom, and the joining surface (4) The molten solder storage recess is formed continuously over the entire length of the surface to be joined. The metal vacuum double container (5) according to any one of claims 1 to 3 is in a state in which the four molten wax storage parts are partially expanded laterally at an appropriate number of locations. The metal vacuum double container according to any one of claims 1 to 4, which has a brazing material device positioning part.