TW202241328A - Method for manufacturing heat-insulating container capable of forming a vacuum insulating layer between an outer container and an inner container without providing a slot for exhaust - Google Patents

Abstract

The present invention provides a method for manufacturing a heat-insulating container, which can form a vacuum insulating layer between an outer container and an inner container without providing a slot for exhaust, wherein a heat-insulating container includes an outer container and an inner container, both of which are made of metal and have a respective opening end. The inner container is accommodated inside the outer container. The opening ends of the outer container and the inner container are joined to each other. A vacuum insulating layer is disposed between the outer container and the inner container. In a decompression situation, a member constituting the outer container and the other member constituting the outer container are welded together to form the vacuum insulating layer between the outer container and the inner container.

Description

Insulated container manufacturing method

The present invention relates to a method of manufacturing a thermally insulated container.

Conventionally, a heat-insulating container is known, which has a metal outer container and an inner container with an opening at one end, and the opening ends of the inner container are joined to each other in a state that the inner container is accommodated inside the outer container, and the outer container and the inner container are connected to each other. Equipped with vacuum insulation. Such insulated containers are widely used in beverage containers, such as water bottles and cups with heat and cold functions, as well as food containers and cookware with heat preservation functions (eg, US Patent Application Publication No. 2019/0231145).

As mentioned above, in the above-mentioned known thermal insulation container, the open ends of the outer container and the inner container are butted with each other, and the butt joints are welded together. In addition, a vacuum insulating layer is formed between the outer container and the inner container by sealing the exhaust hole portion at the bottom of the outer container with a waxy material in a decompression (vacuum) chamber.

On the other hand, the prior art proposes a method of forming a vacuum insulation layer by welding under reduced pressure to seal the slit for exhaust gas on the outer container.

Since the slots are sealed by welding, the weld traces can make them unsightly. On the other hand, if the width or length of the slot is reduced so that the weld traces are less visible, the exhaust air through the slits will be unsightly. The time required will increase, and the manufacturing efficiency will also decrease. Therefore, the present invention was made in view of the above-mentioned conventional situation, and an object thereof is to provide a method of manufacturing a heat insulating container capable of forming a vacuum heat insulating layer between an outer container and an inner container without providing a venting slot.

An object of the present invention is to provide a method of manufacturing a heat-insulating container, wherein a heat-insulating container has an outer container and an inner container made of metal having an opening at one end, and the inner container is accommodated inside the outer container. , the open ends of the outer container and the inner container will be joined to each other, a vacuum insulation layer is provided between the outer container and the inner container, and in the case of decompression, it will constitute one of the components of the outer container and the Another member of the outer container is welded together to form the vacuum insulation layer between the outer container and the inner container.

Optionally, one of the members constituting the bottom portion of the outer container and the other member constituting the trunk portion of the outer container are welded together under reduced pressure.

Optionally, one of the members constituting the shoulder portion of the outer container and the other member constituting the trunk portion of the outer container are welded together in a decompressed state.

Another object of the present invention is to provide a method of manufacturing a thermally insulated container, wherein a thermally insulated container has an outer container and an inner container made of metal with an opening at one end, and the inner container is accommodated inside the outer container. state, the open ends of the outer container and the inner container will be joined to each other, and a vacuum insulation layer is provided between the outer container and the inner container, which will constitute one of the components of the outer container and the Another member constituting the inner container is welded together to form the vacuum insulation layer between the outer container and the inner container.

Optionally, the one component and the other component are joined by laser welding.

Optionally, the outer container and the inner container are made of titanium, aluminum, magnesium or alloys thereof.

As described above, the present invention can provide a method of manufacturing a heat insulating container capable of forming a vacuum heat insulating layer between an outer container and an inner container without providing a venting slot.

In order to facilitate your review committee to further understand and understand the purpose, technical features and effects of the present invention, the embodiments are hereby combined with the drawings, and the details are as follows:

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(first embodiment)

First, the first embodiment of the present invention, such as the heat insulating container 1A shown in FIGS. 1 to 3 and its manufacturing method will be described.

Among them, Fig. 1 is a perspective view of a heat-insulating container 1A according to the first embodiment of the present invention; Fig. 2 is a cross-sectional view of the structure of the heat-insulating container 1A shown in Fig. 1; Fig. 3 is an exploded cross-section of the structure of the heat-insulating container 1A shown in Fig. 1 picture.

Please refer to Fig. 1 to Fig. 3, the heat-insulating container 1A of this embodiment has a metal outer container 2 and an inner container 3 with an opening at one end, and the heat-insulating container 1A is in a state where the inner container 3 is accommodated inside the outer container 2 The opening ends of the outer container 2 and the inner container 3 are joined to each other, and a vacuum insulation layer 4 is provided between the outer container 2 and the inner container 3 .

By having the above-mentioned vacuum heat insulation structure, it is possible to give the heat insulating container 1A of this embodiment the function of keeping warm or cold, and in the heat insulating container 1A, the outer container 2 and the inner container 3 are always placed under an internal pressure ( The state of the difference between vacuum pressure) and external pressure (atmospheric pressure) can increase the mechanical strength of the outer container 2 and the inner container 3. Thereby, even if the sheet metal thickness of the outer container 2 and the inner container 3 is very thin, the rigidity of the heat insulating container 1A can be improved, and the weight of the heat insulating container 1A can be reduced.

The heat insulating container 1A of this embodiment can be a container body with a cover, and the upper opening of the heat insulating container 1A can be opened and closed by a cover (not shown) that can be screwed on and removed from the heat insulating container 1A.

Although the heat-insulating container 1A of this embodiment has an overall bottomed and substantially cylindrical appearance, the present invention does not specifically limit the appearance of the heat-insulating container 1A according to the desired size or design. In addition, painting or printing may be applied to the outer surface of the outer container 2 .

In particular, in the heat insulating container 1A of this embodiment, the outer container 2 has an upper member 2a as one of the members and a lower member 2b as the other member. Wherein, the upper side member 2a constitutes the trunk, shoulders and head and neck of the outer container 2, and the lower side member 2b constitutes the bottom and the trunk of the outer container 2.

In the heat-insulating container 1A of this embodiment, with the inner container 3 housed inside the upper member 2a, the opening ends of the upper member 2a and the inner container 3 are butted together, and the butted portions are joined by welding.

In addition, in the heat insulating container 1A of this embodiment, the upper end of the lower member 2b is inserted into the inner side relative to the upper member 2a joined to the inner container 3, and the upper member 2a and the lower member 2b are bonded by welding. Together, thereby constituting the outer container 2.

Although FIG. 2 shows the joint portion (boundary) between the upper member 2a and the inner container 3, and the joint portion (boundary) between the upper member 2a and the lower member 2b, after joining, these joint parts are melted by welding. , will form a welding bead on the entire circle of the joint part, and the welding bead can be ground and polished after welding to complete a smooth surface.

In addition to the commonly used stainless steel, alloys of titanium, aluminum, magnesium or the like can also be used to make the outer container 2 and the inner container 3 . Moreover, welding methods, such as laser welding, can be used for fusion bonding.

The heat insulating container 1A of the present embodiment forms a vacuum heat insulating layer 4 between the outer container 2 and the inner container 3 by welding the upper member 2a and the lower member 2b constituting the outer container 2 under reduced pressure.

Specifically, when manufacturing the heat insulating container 1A, the upper end of the lower member 2b is brought into a state of being fitted inwardly of the upper member 2a in a depressurized (vacuum suction) chamber, and in this state, the transparent device is installed. The heat insulating container 1A in the chamber is irradiated with laser light from the outside through the window portion of the chamber.

At this time, by irradiating laser light along the boundary between the upper member 2a and the lower member 2b while rotating the heat insulating container 1A around the central axis, the upper member 2a and the lower member 2b can be precisely joined.

It should be noted that in the prior art, in the decompressed (vacuum suction) chamber, the method of sealing the exhaust holes provided on the bottom surface of the outer container with a wax sealing material needs to melt the wax sealing material. It is therefore necessary to heat the insulated container.

For example, when pure titanium, which is lighter than stainless steel, is used to make the outer container and inner container, the wax sealing material suitable for pure titanium must be heated to about 800°C to melt it. In this case, annealing will reduce the mechanical strength of the outer container and inner container, so it is difficult to maintain the same mechanical strength as stainless steel with the same thickness.

Therefore, compared with the case of using stainless steel in the conventional sealing method, the thickness of the outer container and the inner container must be thickened to ensure the mechanical strength of the outer container and the inner container.

Compared with the above-mentioned conventional technology, the manufacturing method of the heat-insulated container 1A of this embodiment does not need to heat the heat-insulated container 1A, and does not require annealing when the outer container 2 and the inner container 3 are made of pure titanium, so the outer container can be thinned 2 and the thickness of the inner container 3, in addition, the power and time required for heating the heat-insulated container 1A are not required.

As described above, the method of manufacturing the heat-insulating container 1A of this embodiment can form the vacuum heat-insulating layer 4 between the outer container 2 and the inner container 3 without providing a slit for exhaust gas.

In addition, the method of manufacturing the heat-insulating container 1A of the present embodiment can exhaust gas from the entire circle between the upper member 2a and the lower member 2b than the case where, for example, a slit for exhaust is provided on a part of the bottom surface of the lower member 2b. The time required for exhaust can be shortened, and the average manufacturing time can be shortened.

However, although the method of manufacturing the heat-insulating container 1A of the present embodiment is exemplified by joining the upper member 2a and the lower member 2b in a depressurized (vacuum suction) chamber as described above, the upper member 2a may be joined to the lower member 2b. 2a and the lower side member 2b leave a part of the unwelded part, and they are welded and joined in atmospheric pressure, and under the reduced pressure state, the unwelded part is sealed by welding by welding, and the outer container 2 and the inner container 3 to form a vacuum insulation layer 4.

Specifically, when sealing the unwelded portion, the heat-insulated container 1A before sealing is stored in a depressurized (vacuum suction) chamber, and the space between the outer container 2 and the inner container 3 is exhausted through the unwelded portion. In this state, the heat-insulating container 1A in the chamber is irradiated with laser light from the outside through the window portion provided in the chamber.

At this time, laser light can be irradiated along the unwelded portion while rotating the heat insulating container 1A around the central axis, whereby the unwelded portion can be accurately sealed.

In addition, in the method of manufacturing the heat-insulated container 1A of this embodiment, a part of the unwelded portion may be left between the upper member 2a and the inner container 3, and the unwelded portion may be passed through by welding under reduced pressure. Fusion sealing, whereby a vacuum insulation layer 4 is formed between the outer container 2 and the inner container 3 .

(second embodiment)

Next, a heat insulating container 1B according to a second embodiment of the present invention as shown in FIGS. 4 to 6 and its manufacturing method will be described.

Among them, Fig. 4 is a perspective view of a heat-insulating container 1B according to the second embodiment of the present invention; Fig. 5 is a cross-sectional view of the structure of the heat-insulating container 1B shown in Fig. 4; Fig. 6 is an exploded cross-section of the structure of the heat-insulating container 1B shown in Fig. 4 picture. In addition, in the following description, description of the same part as this heat insulating container 1A is abbreviate|omitted, and the same code|symbol is attached|subjected in drawing.

In the heat-insulating container 1B of this embodiment, as shown in FIGS. 4 to 6 , the outer container 2 has an upper member 2c as one of the members and a lower member 2d as the other member, wherein the upper member 2c constitutes the outer container 2 The shoulders and head and neck of the body, the bottom of the outer container 2 and the torso are formed by the lower member 2d.

In the heat-insulating container 1B of this embodiment, with the inner container 3 accommodated inside the upper member 2c, the opening ends of the upper member 2c and the inner container 3 are butted together, and the butted portions are joined by welding.

In addition, in the heat-insulating container 1B of the present embodiment, the upper member 2c and the lower member 2d are butted against each other in a state where the upper end of the lower member 2d is inserted into the inner side relative to the upper member 2c joined to the inner container 3, and the upper member 2c is welded to the lower member 2d. The outer container 2 is constructed by joining these upper member 2a and lower member 2b.

Although FIG. 5 shows the joint portion (boundary) between the upper member 2c and the inner container 3, and the joint portion (boundary) between the upper member 2c and the lower member 2d, after joining, these joint portions are melted by welding. , will form a weld bead around the entire circle of the joint. Also, a smooth surface can be achieved by grinding and polishing the bead after welding.

The heat insulating container 1B of the present embodiment forms a vacuum heat insulating layer 4 between the outer container 2 and the inner container 3 by welding the upper member 2c and the lower member 2d constituting the outer container 2 under reduced pressure.

Specifically, when manufacturing the heat insulating container 1B, the upper end of the lower member 2d is brought into a state of being fitted inwardly of the upper member 2c in a depressurized (vacuum suction) chamber. A window portion provided in the chamber irradiates laser light to the heat insulating container 1B in the chamber from the outside.

At this time, by irradiating laser light along the boundary between the upper member 2c and the lower member 2d while rotating the heat insulating container 1B around the central axis, the upper member 2a and the lower member 2b can be precisely joined.

Compared with the above-mentioned conventional technology, the manufacturing method of the heat-insulating container 1B of this embodiment does not need to heat the heat-insulating container 1B, and does not require annealing when the outer container 2 and the inner container 3 are made of pure titanium, so the outer container can be thinned 2 and the thickness of the inner container 3, in addition, the electric power and time required for heating the heat-insulating container 1B are not required.

As described above, the method of manufacturing the heat insulating container 1B of this embodiment can form the vacuum heat insulating layer 4 between the outer container 2 and the inner container 3 without providing a slit for exhaust gas.

In addition, the method of manufacturing the heat-insulating container 1B of this embodiment can exhaust gas from the entire circle between the upper member 2c and the lower member 2d compared to the case where the exhaust slit is provided on a part of the bottom surface of the lower member 2d, for example. The time required for exhaust can be shortened, and the average manufacturing time can be shortened.

However, although the method of manufacturing the heat-insulating container 1B of the present embodiment is exemplified by joining the upper member 2c and the lower member 2d in a depressurized (vacuum suction) chamber as described above, the upper member may also be 2c and the lower side member 2d leave a part of the unwelded part, and they are welded and joined in the atmospheric pressure, and under the decompressed state, the unwelded part is sealed by welding by welding, so that it can be sealed in the outer container. 2 and the inner container 3 to form a vacuum insulation layer 4.

Specifically, when sealing the unwelded portion, the heat-insulated container 1B before sealing is stored in a depressurized (vacuum suction) chamber, and the space between the outer container 2 and the inner container 3 is exhausted through the unwelded portion. In this state, the heat-insulating container 1B in the chamber is irradiated with laser light from the outside through the window portion provided in the chamber.

At this time, laser light can be irradiated along the unwelded portion while rotating the heat insulating container 1A around the central axis, whereby the unwelded portion can be accurately sealed.

In addition, in the method for manufacturing the heat-insulated container 1B of this embodiment, a part of the unwelded portion can be left between the upper member 2c and the inner container 3, and the unwelded portion can be sealed by welding under a reduced pressure state, so that A vacuum insulation layer 4 is formed between the outer container 2 and the inner container 3 .

(third embodiment)

Next, a heat insulating container 1C according to a third embodiment of the present invention as shown in FIGS. 7 to 9 and its manufacturing method will be described.

Among them, Fig. 7 is a perspective view of a heat insulating container 1C according to the third embodiment of the present invention; Fig. 8 is a cross-sectional view of the structure of the heat insulating container 1C shown in Fig. 7; Fig. 9 is an exploded section of the structure of the heat insulating container 1C shown in Fig. 7 picture. In addition, in the following description, description of the same part as this heat insulating container 1A is abbreviate|omitted, and the same code|symbol is attached|subjected in drawing.

In the heat-insulating container 1C of this embodiment, as shown in FIGS. 7 to 9, when the inner container 3 is housed inside the outer container 2, the opening ends of the outer container 2 and the inner container 3 are aligned, and the aligned parts are welded together. join.

Although Fig. 5 shows the joint portion (boundary) of the outer container 2 and the inner container 3, after joining, these joint portions are melted by welding, and a weld bead will be formed on the entire circumference of the joint portion. After welding, the bead is ground and polished to achieve a smooth surface.

The heat-insulating container 1C of this embodiment is formed by welding and joining the outer container 2 and the inner container 3 under a decompressed state to form a vacuum heat-insulating layer 4 between the outer container 2 and the inner container 3 .

Specifically, when manufacturing the heat-insulating container 1C, it is in a depressurized (vacuum suction) chamber, and the outer container 2 and the opening edge of the inner container 3 are aligned. The window portion of the chamber irradiates laser light to the heat-insulating container 1C in the chamber from the outside.

At this time, by irradiating laser light along the boundary between the outer container 2 and the inner container 3 while rotating the heat insulating container 1C around the central axis, the outer container 2 and the inner container 3 can be joined accurately.

Compared with the above-mentioned conventional technology, the manufacturing method of the heat-insulating container 1C of this embodiment does not need to heat the heat-insulating container 1C, and does not require annealing when the outer container 2 and the inner container 3 are made of pure titanium, so the outer container can be thinned 2 and the thickness of the inner container 3, in addition, the electric power and time required for heating the heat-insulating container 1C are unnecessary.

As described above, the method of manufacturing the heat-insulating container 1C of this embodiment can form the vacuum heat-insulating layer 4 between the outer container 2 and the inner container 3 without providing a slit for exhaust gas.

Also, the method for manufacturing the heat-insulating container 1C of the present embodiment can exhaust air from the entire circle between the outer container 2 and the inner container 3 compared to the case where, for example, a part of the bottom surface of the outer container 2 is provided with a slot for exhausting, so that the time can be shortened. The time required for degassing can shorten the average manufacturing time.

However, although the manufacturing method of the heat-insulating container 1C of the present embodiment is exemplified by joining the outer container 2 and the inner container 3 in a depressurized (vacuum suction) chamber as described above, the outer container 2 may also be A part of the unwelded part is left between the inner container 3, and they are welded and joined under atmospheric pressure, and the unwelded part is sealed by welding under a reduced pressure state, so that the outer container 2 and the inner container 3 are sealed. A vacuum insulation layer 4 is formed between them.

Specifically, when sealing the unwelded portion, the heat-insulated container 1C before sealing is stored in a depressurized (vacuum suction) chamber, and the space between the outer container 2 and the inner container 3 is exhausted through the unwelded portion. In this state, the heat-insulating container 1C in the chamber is irradiated with laser light from the outside through the window portion provided in the chamber.

At this time, the unwelded portion can be accurately sealed by irradiating laser light along the unwelded portion while rotating the heat insulating container 1C around the central axis.

In addition, in the method of manufacturing the heat-insulated container 1C of this embodiment, a part of the unwelded portion can be left between the outer container 2 and the inner container 3, and the unwelded portion can be sealed by welding under reduced pressure. Thereby, a vacuum heat insulating layer 4 is formed between the outer container 2 and the inner container 3 .

However, the present invention is not limited to the above-mentioned embodiments, and various changes can be made without departing from the scope of the spirit of the present invention. The case of the container body, but the present invention can also be applied to a wide range of thermally insulated containers, such as beverage containers such as water bottles and cups with heat preservation and cold preservation functions, food containers and cooking utensils with heat preservation functions.

According to, the above description is only a preferred embodiment of the present invention, but the scope of rights claimed by the present invention is not limited thereto. According to those who are familiar with the art, according to the technical content disclosed in the present invention, they can The easily conceivable equivalent changes shall all fall within the scope of protection of the present invention.

[knowledge] none [this invention] 1A, 1B, 1C: Insulated containers 2: outer container 2a, 2c: upper side member (one of the members) 2b, 2d: lower side member (another member) 3: inner container 4: Vacuum insulation layer

[Fig. 1] is a perspective view of a heat insulating container according to the first embodiment of the present invention; [Fig. 2] is a cross-sectional view of the structure of the insulated container shown in Fig. 1; [Fig. 3] is an exploded sectional view of the structure of the insulated container shown in Fig. 1; [Fig. 4] is a perspective view of a heat-insulated container according to a second embodiment of the present invention; [Fig. 5] is a cross-sectional view of the structure of the insulated container shown in Fig. 4; [Fig. 6] is an exploded sectional view of the structure of the insulated container shown in Fig. 4; [ FIG. 7 ] is a perspective view of a heat-insulated container according to a third embodiment of the present invention; [Fig. 8] is a sectional view of the structure of the insulated container shown in Fig. 7; and [ Fig. 9 ] is an exploded sectional view of the structure of the heat insulating container shown in Fig. 7 .

1A: Insulated container

2: outer container

2a: Upper member (one of the members)

2b: Lower member (another member)

3: inner container

4: Vacuum insulation layer

Claims (6)

A method of manufacturing a heat-insulating container, wherein a heat-insulating container has an outer container and an inner container made of metal having an opening at one end, and the outer container and the inner container are in a state in which the inner container is housed inside the outer container. The open ends of each other will be joined to each other, a vacuum insulation layer is provided between the outer container and the inner container, and one of the components constituting the outer container and the other component constituting the outer container are welded together under reduced pressure connected in a manner to form the vacuum insulation layer between the outer container and the inner container. The method for manufacturing a heat-insulated container according to claim 1, wherein one of the members constituting the bottom portion of the outer container and the other member constituting the trunk portion of the outer container are welded together under reduced pressure. . The method for manufacturing a heat-insulated container according to claim 1, wherein, under a reduced pressure state, one of the members constituting the shoulder portion of the outer container and the other member constituting the trunk portion of the outer container are welded together. join. A method of manufacturing a heat-insulating container, wherein a heat-insulating container has an outer container and an inner container made of metal having an opening at one end, and the outer container and the inner container are in a state in which the inner container is housed inside the outer container. The open ends of each other will be joined to each other, and a vacuum insulation layer is provided between the outer container and the inner container. Under the condition of decompression, one of the members forming the outer container and the other member forming the inner container are separated welded to form the vacuum insulation layer between the outer container and the inner container. The method for manufacturing a heat-insulated container according to any one of claims 1 to 4, wherein the one member and the other member are joined by laser welding. The method for manufacturing a thermally insulated container according to any one of claims 1 to 5, wherein the outer container and the inner container are made of titanium, aluminum, magnesium or alloys thereof.

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