JPS588191Y2 - double container - Google Patents

Description

[Detailed description of the invention] The present invention relates to a double container such as a thermos flask, which is composed of an inner bottle and an outer bottle made of glass material, and forms a sealed space between the inner and outer bottles. The present invention relates to an improvement in a spacer that maintains a constant distance between bottles and protects inner bottles from impact.

Conventionally, in double containers such as thermos flasks, asbestos was bonded to the inner or outer bottle as a spacer using a water-soluble inorganic adhesive.

However, in the plating process, the asbestos contains the plating solution and cleaning water, which increases the drying time, does not improve the vacuum level of the double bottle space, and some of the adhesive dissolves in the plating solution or cleaning water, so the spacer cannot be used. Sometimes it came off.

In addition, there is a heating heat-insulating container that heats and retains the contents stored in the container by enclosing an evaporative heat medium in the double bottle space and heating the heating part of the container, making use of the phase change of evaporation and condensation of the heat medium. etc., the asbestos spacer decomposes in the heat medium and becomes unable to hold the inner bottle against impact.

Furthermore, asbestos has disadvantages such as the fact that at about 450°C, the water of crystallization of the chrysotile constituting asbestos is dehydrated and becomes ash-like and brittle, so that it cannot be annealed for a long time at about 600°C.

This invention has a heat resistance temperature of 600℃ to eliminate the above-mentioned drawbacks.
In addition, a spacer made of ceramic with no difference in thermal expansion coefficient between the inner bottle and the outer bottle is used, and this spacer is adhered to either the inner bottle or the outer bottle with a non-water soluble adhesive, and the drying time and This shortens the evacuation time and prevents the spacer from decomposing and causing the bottle to be easily damaged even when a heat medium is sealed.

Hereinafter, embodiments of the present invention will be explained.

FIG. 1 shows a sectional view of an embodiment of the double container of the present invention.

During bottle manufacturing, ceramics are made of borosilicate glass material and are used as an insulator between the inner bottle 1 and outer bottle 2, which has a heat resistance of 600℃.
Spacer 3 with a constant thickness made of a non-water-absorbing material
and an adhesive with a heat resistance temperature of 600°C or higher, not soluble in hardening liquid, and a coefficient of thermal expansion close to that of borosilicate glass, which is the bottle material, such as an inorganic adhesive made of silica/alumina in a phosphoric acid solvent. A double container is manufactured by adhering the spacer 3 to either the inner bottle 1 or the outer bottle 2 using the same method, maintaining a constant distance between the inner bottle and the outer bottle, and welding the bottle mouth.

The double container made using the above spacer 3 is heated to 500 to 600°C in a furnace to remove distortion from the bottle, but at this time the spacer 3 can withstand enough heat to cause it to become brittle or oxidize. There is no other deterioration.

Also, during the plating process, the spacer 3 does not absorb the plating solution or cleaning water injected between the inner bottle 1 and the outer bottle 2, so the drying time can be significantly shortened, and since the adhesive is water-insoluble, the spacer 3 There is no danger of 3 falling out of the bottle.

Furthermore, as shown in the cross-sectional view of the embodiment of the double container sealed with a heating medium in FIG. In the case of a double container of a heating and heat-insulating container in which the heat of the installed heater 5 is transferred to the stored material 6 to heat and keep it warm by utilizing the phase change of evaporation and condensation of the heat medium 4, a glycol aqueous solution is used as the heat medium 4. If an aqueous alcohol solution or the like is used, the spacer 3 will not dissolve or decompose in the heat medium 4, will not only sufficiently hold the inner bottle 1, but will not deteriorate the heat medium.

In addition, the thermal expansion coefficient of the spacer 3 of the present invention is
Since the value is close to that of the borosilicate glass of the outer bottle, there is no fear that the spacer 3 will separate from the inner bottle 1 or the outer bottle 2 due to the difference in thermal expansion coefficient.

The following table shows the expansion coefficients of the inner bottle, outer bottle, adhesive, and spacer.

From the table above, when ceramics for insulators are used for the spacer 3, the expansion coefficient is 1. Since the value is close to that of the adhesive of the silica and alumina components of the outer bottle 2 and phosphoric acid solvent, there is no risk that the spacer 3 will come off from the inner bottle 1 or the outer bottle 2 due to the difference in thermal expansion coefficient. ) is used as a spacer, the expansion coefficient is 1. Since it is smaller than the outer bottle 2 and the adhesive, there is a risk that the spacer will come off from the inner bottle 1 or the outer bottle 2 due to the difference in thermal expansion coefficient.

Furthermore, ceramic spacers for insulators are easy to manufacture and extremely inexpensive, but alumina (ceramic) spacers are laborious and expensive to manufacture.

Note that general ceramics can be used as the spacer.

FIG. 3 shows a perspective view of an embodiment of the spacer of the present invention.

The upper surface 12 and lower surface 13 of the spacers 31 and 32 are respectively connected to the inner bottle 1. If the shape is such that it makes surface contact with the outer bottle 2, the holding force of the inner bottle is strong, and damage to the inner bottle 1 or the outer bottle 2 is less likely even if an impact is applied.

Also, if the holding force may be slightly weaker, use spacers 33 and 34.
The upper surface 14 and lower surface 15 of the inner bottle 1. If surface contact is made with the outer bottle 2, it is advantageous in terms of cost.

As described above, a spacer made of ceramic is easy to manufacture and can be made at a lower cost than ceramics such as alumina, and it is possible to provide a spacer with no difference in expansion coefficient.

Furthermore, the use of the spacer described above has the advantage that there is no need to worry about contaminating the manufacturing environment like asbestos.

As described above, according to the structure of the present invention, the spacer is made of ceramic having an expansion coefficient close to that of the bottle and the adhesive, which eliminates all the previous drawbacks and provides an extremely excellent double-layered spacer. A container can be provided.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the double container of the present invention, Fig. 2 is a sectional view showing an embodiment of the double container sealed with the heat medium of the present invention, and Fig. 3 is a sectional view showing an embodiment of the double container of the present invention. FIG. 3 is a perspective view of an embodiment of a spacer. 1...Inner bottle, 2...Outer bottle, 3...
...Spacer, 4...Heating medium, 5...
Heater, 6...Storage, 31.32, 33.3
4...Spacer.

Claims (1)

[Scope of Claim for Utility Model Registration] In a double container consisting of an inner bottle and an outer bottle made of borosilicate glass material, and forming a sealed space between the inner and outer bottles, a spacer made of ceramic is provided in the inner bottle. Alternatively, it is characterized by adhering to either one of the outer bottles with an adhesive containing silica/alumina components of a phosphoric acid solvent, and using this spacer to maintain a constant distance between the inner and outer bottles. double container.