JP6295279B2 - Method for manufacturing vacuum insulated double container - Google Patents

Description

  The present invention relates to a method for manufacturing a vacuum insulated double container.

  As containers for pouring beverages such as beer, various materials such as glass and ceramics have been proposed so far, and the applicant of the present invention is made of metal (made of titanium) disclosed in Japanese Patent Application Laid-Open No. 2003-129291. A vacuum insulated double container is proposed.

JP 2003-129291 A

  As a result of further research and development of this metal vacuum insulated double container, the present applicant has developed an innovative manufacturing method capable of providing a vacuum insulated double container having extremely high commercial value.

  The gist of the present invention will be described with reference to the accompanying drawings.

A titanium inner cylinder 2 is disposed in the titanium outer cylinder 1 through a space S, and a vacuum insulation is provided with the space S between the outer cylinder 1 and the inner cylinder 2 as a vacuum heat insulation space. A method of manufacturing a double container, wherein the space S is deaerated while the outer cylinder 1 and the inner cylinder 2 are heated in a vacuum heating furnace 6 to vacuum seal the deaeration holes, and then the vacuum Nitrogen gas T is introduced into the heating furnace 6 to form a nitriding part 10 on the surface of the outer cylinder 1, and then the nitriding part 10 is heat-treated . The present invention relates to a method for producing a vacuum heat insulating double container characterized by anodizing and coloring.
Record
The outer cylinder 1 is used as an anode, and a conductive metal is used as a cathode, and an anodic oxide film 9 is formed on the surface of the outer cylinder 1, and the thickness of the anodic oxide film 9 is determined depending on the applied voltage and time. Process to adjust appropriately.

Further, a titanium inner cylinder 2 is disposed in the titanium outer cylinder 1 via a space S, and the space S between the outer cylinder 1 and the inner cylinder 2 is used as a vacuum heat insulating space. A method for manufacturing a vacuum insulated double container, wherein the outer cylinder 1 and the inner cylinder 2 are heated in a vacuum heating furnace 6 to degas the space S and vacuum seal the deaeration holes, The outer cylinder 1 and the inner cylinder 2 are cooled, then the outer cylinder 1 and the inner cylinder 2 are heated in the vacuum heating furnace 6, and then nitrogen gas T is introduced into the vacuum heating furnace 6. Then, a nitriding part 10 is formed on the surface of the outer cylinder 1, and then the nitriding part 10 is heat-treated, and then the surface of the outer cylinder 1 is colored by the following anodizing process. It concerns on the manufacturing method of the vacuum heat insulation double container.
Record
The outer cylinder 1 is used as an anode, and a conductive metal is used as a cathode, and an anodic oxide film 9 is formed on the surface of the outer cylinder 1, and the thickness of the anodic oxide film 9 is determined depending on the applied voltage and time. Process to adjust appropriately.

Moreover, in the manufacturing method of the vacuum heat insulation double container of any one of Claim 1, 2, nitrogen gas T is introduce | transduced in the said vacuum heating furnace 6 in the state which obstruct | occluded the opening part of the said inner cylinder 2. The present invention relates to a method for manufacturing a vacuum insulated double container, characterized in that a nitriding portion 10 is formed on the surface of the outer cylinder 1.

Moreover, in the manufacturing method of the vacuum heat insulation double container of Claim 3, it arrange | positions the said inner cylinder 2 to the mounting surface 6a of the said vacuum heating furnace 6, and closes the opening part of this inner cylinder 2 The present invention relates to a method for producing a vacuum heat insulating double container.

  The vacuum insulated double container obtained by the present invention is colored by subjecting the nitrided portion formed on the metal surface to heat treatment and then anodizing, so that it has an unprecedented unique texture and is very high quality. The unique texture of this surface uses nitridation by nitrogen gas used for cooling in the vacuum heating furnace, so it can be realized reliably, and the high-quality vacuum insulated double container described above can be realized. This is an epoch-making method for producing a vacuum insulated double container that exhibits unprecedented effects such as reliable and efficient production.

It is a perspective view of the vacuum heat insulation double container manufactured by the present Example. It is the elements on larger scale of the vacuum heat insulation double container manufactured by the present Example. It is a plane sectional view of the vacuum heat insulation double container manufactured by the present Example. It is manufacturing process explanatory drawing of the vacuum heat insulation double container which concerns on a present Example. It is explanatory sectional drawing of the to-be-processed object 3. FIG. It is explanatory sectional drawing of the to-be-processed object 3. FIG. It is manufacturing process explanatory drawing of the vacuum heat insulation double container which concerns on a present Example. It is manufacturing process explanatory drawing of the vacuum heat insulation double container which concerns on a present Example. It is manufacturing process explanatory drawing of the vacuum heat insulation double container which concerns on a present Example. FIG. 3 is an explanatory perspective view of an object to be processed 3. It is manufacturing process explanatory drawing of the vacuum heat insulation double container which concerns on a present Example.

  An embodiment of the present invention which is considered to be suitable will be briefly described with reference to the drawings showing the operation of the present invention.

  In the present invention, while the outer cylinder 1 and the inner cylinder 2 are heated in the vacuum heating furnace 6, the space S is deaerated to vacuum seal the deaeration holes, and then the nitrogen gas T is introduced into the vacuum heating furnace 6. Then, the nitriding part 10 is formed on the surface of the outer cylinder 1, and then the nitriding part 10 is heat-treated, and then the surface of the outer cylinder 1 is anodized and colored. The surface of the outer cylinder 1 has a unique texture that glitters with a metal crystal pattern colored by anodizing (for example, purple or yellow).

  Therefore, it is possible to manufacture a container with a completely new design that exhibits a unique texture by a simple method.

  Specific embodiments of the present invention will be described with reference to the drawings.

  In the present embodiment, the inner cylinder 2 is disposed in the outer cylinder 1 via the space S, and the vacuum insulation double container having the space S between the outer cylinder 1 and the inner cylinder 2 as a vacuum insulation space. It is a manufacturing method. In the present embodiment, the vacuum insulated double container is configured as a tumbler used when drinking alcoholic beverages such as wine and whiskey, but is not limited thereto.

  As shown in FIGS. 1 and 3, the outer cylinder 1 and the inner cylinder 2 according to the present embodiment are bottomed cylindrical bodies made of metal (made of titanium), and the inner cylinder 2 has a diameter as compared with the outer cylinder 1. Small and low in height, and the openings 1a and 2a are set to have substantially the same diameter.

  Therefore, the inner cylinder 2 is coaxially arranged in the outer cylinder 1 and the openings 1 a and 2 a are joined together, so that a space S is formed between the outer cylinder 1 and the inner cylinder 2.

  Titanium in this specification refers to pure titanium and titanium alloys. The material (component), thickness and size (shape) of each of the outer cylinder 1 and the inner cylinder 2 are the functions (particularly heat insulation) of the vacuum heat insulating double container when manufactured as a vacuum heat insulating double container described later. It is selected as appropriate in consideration of the formation of concavo-convex portions 4 and 5 which will be described later to such an extent that the function is not lowered.

  In addition, the raw material which comprises the outer cylinder 1 and the inner cylinder 2 may be other metals, such as stainless steel, and will be employ | adopted suitably if it is the structure which exhibits the characteristic of a present Example.

  A recess 1b is provided at the center of the bottom of the outer cylinder 1, and a deaeration hole 1b 'for vacuum sealing is provided at the center of the recess 1b.

  The outer cylinder 1 and the inner cylinder 2 are formed with innumerable irregularities 4 and 5 on the surfaces thereof in the manufacturing process described later as shown in FIGS.

  Therefore, the uneven parts 4 and 5 provided on the surface of the vacuum heat insulating double container composed of the outer cylinder 1 and the inner cylinder 2 are made of titanium (metal), but have a design that feels like a pottery. Will be presented.

  The manufacturing method of the vacuum heat insulation double container using the outer cylinder 1 and the inner cylinder 2 which consist of the above structure is demonstrated.

  First, the inner cylinder 2 is arranged in the outer cylinder 1, the openings 1a and 2a are joined to each other by welding (TIG welding), and the object 3 is provided. A space S is formed between the inner surface of the outer cylinder 1 and the outer surface of the inner cylinder 2 constituting the workpiece 3. This space part S becomes a vacuum heat insulation space part by vacuum processing later.

  Subsequently, the space S between the outer cylinder 1 and the inner cylinder 2 is deaerated to vacuum seal the deaeration hole 1b '.

  Specifically, as shown in FIGS. 4 and 5, the object 3 is placed in the vacuum heating furnace 6. At this time, the object to be processed 3 is placed upside down on the flat mounting surface 6a so that the opening 3a is closed, and in this state, the brazing material is disposed around the deaeration hole 1b 'provided at the bottom of the outer cylinder 1. 7 (titanium brazing) is disposed, and a sealing plate 8 is placed on the brazing material 7.

In this state, the temperature in the vacuum heating furnace 6 is set to about 800 ° C. or higher, gradually deaerated to a high vacuum state (10 ⁻³ to 10 ⁻⁵ Torr), and the temperature is further increased to about 1050 ° C.

  At this time, the brazing material 7 is melted, the outer cylinder 1 and the sealing plate 8 are integrated, the deaeration hole 1b ′ is closed, and the space S between the outer cylinder 1 and the inner cylinder 2 is sealed in a vacuum state. It stops and a vacuum heat insulation space part is formed (refer FIG. 6).

  When the heating is stopped and the temperature in the vacuum heating furnace 6 is lowered to a temperature lower than 700 ° C. (about 630 ° C. to 670 ° C.) by natural cooling, nitrogen gas T is introduced into the vacuum heating furnace 6 and normal pressure is applied. (At this point, the concave and convex portions 4 and 5 are formed), the temperature of the object to be processed 3 is cooled down to room temperature at once, and the vacuum sealing operation is completed.

Specifically, the temperature in the vacuum heating furnace 6 is set to about 1,050 ° C. which is equal to or higher than the recrystallization temperature of titanium and exceeds the transformation point 880 ° C. of titanium (a temperature at which the α structure changes from the β structure). The state (10 ⁻³ to 10 ⁻⁵ Torr) is set, and this state is maintained for 15 to 20 minutes. Thereby, the outer cylinder 1 and the inner cylinder 2 of the to-be-processed object 3 recrystallize (it becomes (beta) structure | tissue), and ductility increases (the part which is not recrystallized is in the state where the crystal grain became coarse). Thereafter, the heating is stopped, and when the temperature in the vacuum heating furnace 6 becomes about 700 ° C. or less due to natural cooling, nitrogen gas T is introduced into the vacuum heating furnace 6 to return to normal pressure and normal temperature at once. The body 3 is rapidly cooled. In this heating / cooling normal pressure process, the outer cylinder 1 and the inner cylinder 2 have uneven portions 4 and 5.

  The process of returning to atmospheric pressure (introducing nitrogen gas) at a temperature lower than 700 ° C. is because the material is too soft at a high temperature of about 700 ° C. or higher. When the pressure is returned to normal pressure), the outer cylinder 1 and the inner cylinder 2 are largely recessed, and a portion where the outer cylinder 1 and the inner cylinder 2 come into contact with each other is formed. This is to prevent this. However, even if the pressure is returned to normal pressure at a too low temperature, the unevenness is hardly formed and it takes too much time, resulting in poor productivity.

  The outer cylinder 1 and the inner cylinder 2 placed in the vacuum heating furnace 6 under the atmospheric pressure environment have countless large uneven portions 4 and 5 formed on the surface (see FIG. 6), and nitrogen gas With the introduction of T, the concavo-convex portions 4 and 5 are fixed by returning to normal temperature.

  Although not shown, a cover body is fitted in advance on each object to be processed 3 during the vacuum sealing operation, and when the object to be processed 3 is cooled with the nitrogen gas T, The nitrogen gas T is not touched. When the titanium brazing material is used as the brazing material 7, the brazing material 7 is nitrided when it is exposed to the nitrogen gas T at a high temperature, and the performance as the brazing material 7 is deteriorated. Therefore, the brazing material 7 is prevented from touching the nitrogen gas T. At this time, when the object 3 is cooled, it may be cooled using argon gas.

  Subsequently, the object to be processed 3 that has been subjected to the vacuum sealing operation is again placed in the vacuum heating furnace 6 so that the cover body is fitted, and heating / cooling normal pressure including heating / cooling similar to that described above is performed. Process.

  By this process, titanium crystal grains grow larger and the uneven portions 4 and 5 become larger.

  Subsequently, a nitriding portion 10 (nitriding layer) is formed on the surface of the workpiece 3 (outer cylinder 1) that has been vacuum-sealed.

  Specifically, in the vacuum heating furnace 6, the object to be processed 3 is not covered with the cover body, and is heated in this state (to the extent that the brazing material 7 is not melted). When cooled, the nitriding portion 10 is formed on the outer surface 3 b of the workpiece 3 by touching the nitrogen gas T. The nitriding portion 10 is black and frosted. Further, the inner surface 3b (the inner surface of the inner cylinder 2) of the object to be processed 3 is not nitrided because it does not touch the nitrogen gas T, and exhibits a silvery white texture of the material (titanium).

  In forming the nitriding portion 10, the concavo-convex portions 4 and 5 are formed although not as in the steps described above.

  In addition, you may carry out by covering the opening part 3a of the to-be-processed body 3 as a structure for not touching the nitrogen gas T to the inner surface 3b of this to-be-processed body 3. FIG.

  In this embodiment, in order to form the uneven portions 4 and 5 satisfactorily, the heating / cooling normal pressure treatment for cooling the object to be processed 3 after heating is performed three times in total. It may be performed only once, or twice during the vacuum sealing and the formation of the nitride portion 10. In the former case, it is performed in a state in which the cover body is not fitted to the object to be processed 3 and the performance of the brazing material 7 cannot be denied, but the vacuum sealing and the formation of the nitriding portion 10 can be performed efficiently and simultaneously. become.

  Subsequently, the nitriding portion 10 of the workpiece 3 is heat-treated.

  Specifically, the workpiece 3 is placed in the vacuum heating furnace 6. At this time, the object to be processed 3 is arranged upside down on the flat mounting surface 6a so that the opening 3a is closed, and a cover body 11 is fitted on the object to be processed 3.

  When the temperature in the vacuum heating furnace 6 is raised to about 1050 ° C. in this state, the nitriding section 10 is heated to become white (gray) (see FIG. 8). At this time, about 30% of the titanium crystal glitters on the entire outer surface 3c of the object 3 to be processed. In this embodiment, this is anodized as described later to color the surface. Even if the nitrogen gas T is introduced for rapid cooling after the nitriding portion 10 is heat-treated, the nitriding portion 10 is not formed on the outer surface 3c of the object 3 because the cover body 11 is fitted. (See FIGS. 9 and 10).

  Subsequently, the object 3 is anodized to color the inner and outer surfaces 3b and 3c to complete.

  Specifically, as shown in FIG. 10, the anodizing treatment is performed by subjecting an object to be treated 3 as an anode and a conductive metal 15 (for example, aluminum or copper) as a cathode to a conductive aqueous solution 13 (electrolyte). Solution / sulfuric acid aqueous solution or phosphoric acid aqueous solution), and a voltage is applied to form the anodic oxide film 9 on the inner and outer surfaces 3b, 3c of the object 3 to be treated. Reference numeral 12 denotes a processing container, and 14 denotes an electric circuit.

  By this anodic oxidation treatment, the inner and outer surfaces 3b and 3c of the workpiece 3 are colored.

  The anodized film 9 formed on the inner and outer surfaces 3b and 3c of the object 3 can be various colors depending on the composition of the conductive metal 15 and the aqueous solution 13 as a cathode. Due to the refraction action (interference action), a color different from the ground color before the anodizing treatment is developed (see FIGS. 1 and 2).

  Further, the thickness of the anodic oxide coating 9 can be varied by adjusting the applied voltage and time, and the color of the anodic oxide coating 9 changes depending on the thickness. Specifically, for example, colors such as yellow, blue, and purple can be naturally developed in order from the thicker to the thinner anodic oxide coating 9.

  If a brazing material that melts at a temperature lower than the recrystallization temperature of titanium is used, a double container having a vacuum heat-insulating space portion in which the uneven portions 4 and 5 are not formed is formed. Using this double container, the outer surface 3c of the outer cylinder 1 may be nitrided, and the inner and outer surfaces 3b, 3c may be anodized. Further, the anodizing treatment may be performed only on the outer surface 3c of the outer cylinder 1 where the nitriding portion 10 is formed.

  Since the present embodiment is configured as described above, the nitrided portion 10 formed on the metal surface 3c is heated and then anodized to be colored, so that the vacuum insulation with a very high quality exhibiting an unprecedented unique texture. The unique texture of the surface of this vacuum insulated double container is based on the use of nitriding with nitrogen gas used for cooling in the vacuum heating furnace when manufacturing the vacuum insulated double container. Therefore, it can be surely realized, and the above-described high-quality vacuum insulated double container can be reliably and efficiently manufactured.

  In the present embodiment, the inner surface 3b where the nitriding portion 10 is not formed is also colored by anodizing treatment, so that a high-class feeling can be improved and the commercial value can be further enhanced.

  In addition, the present embodiment is made of titanium, and has an extremely high-grade (high artistic) high-quality that exhibits a design like a pottery from the unevenness formed by the uneven portions 4 and 5 provided on the surface thereof. A vacuum insulated double container having the added value that there is no two of the same will be obtained, and the uneven part provided on the surface of this vacuum insulated double container uses recrystallization of titanium. Therefore, it is possible to reliably and efficiently manufacture the above-described high-quality vacuum insulated double container that does not have two identical ones.

  Further, in this embodiment, a unique texture design (titanium crystal pattern) with large crystal grains can be obtained by heating the outer cylinder 1 and the inner cylinder 2 of the object 3 to be processed. The sheath, shape, arrangement, and the like are random, so that not only the uneven portions 4 and 5 described above but also various patterns can be manufactured without intention. In the actual manufacturing process, a portion that does not recrystallize will also appear, and this will appear as an original pattern. In addition, in this example, the process of heating and returning to room temperature is repeated a plurality of times. Concavities and convexities are formed on the part, and this also forms an original pattern.

  In the present embodiment, since the outer cylinder 1 and the inner cylinder 2 are made of titanium, it is possible to further increase the sense of quality by making them all titanium.

  In addition, this example is also useful in this respect because the anodized film has an action of improving antibacterial action and corrosion resistance.

  Note that the present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate.

S space T nitrogen gas 1 outer cylinder 2 inner cylinder 6 vacuum heating furnace
6a mounting surface 9 anodized film
10 Nitriding part

Claims (4)

A method for manufacturing a vacuum insulated double container in which a titanium inner cylinder is disposed in a titanium outer cylinder via a space, and the space between the outer cylinder and the inner cylinder is a vacuum heat insulating space. The space and the inner cylinder are heated in a vacuum heating furnace while the space is deaerated to vacuum seal the deaeration holes, and then nitrogen gas is introduced into the vacuum heating furnace. the nitride portion is formed on the surface of the outer cylinder, then, the nitride portion heat treatment, followed by vacuum insulated double characterized by coloring the surface of the outer cylinder and anodized below Container manufacturing method.
Record
A process of adopting the outer cylinder as the anode and a conductive metal as the cathode, and forming an anodic oxide film on the surface of the outer cylinder, and appropriately adjusting the thickness of the anodic oxide film according to the applied voltage and time . A method for manufacturing a vacuum insulated double container in which a titanium inner cylinder is disposed in a titanium outer cylinder via a space, and the space between the outer cylinder and the inner cylinder is a vacuum heat insulating space. The outer cylinder and the inner cylinder are heated in a vacuum heating furnace and the space is deaerated to vacuum seal the deaeration holes, and then the outer cylinder and the inner cylinder are cooled. The outer cylinder and the inner cylinder are heated in the vacuum heating furnace, and then nitrogen gas is introduced into the vacuum heating furnace to form a nitriding portion on the surface of the outer cylinder, and then the nitriding A method for producing a vacuum heat insulating double container, characterized in that the part is heat-treated and then the surface of the outer cylinder is colored by the following anodizing treatment.
Record
A process of adopting the outer cylinder as the anode and a conductive metal as the cathode, and forming an anodic oxide film on the surface of the outer cylinder, and appropriately adjusting the thickness of the anodic oxide film according to the applied voltage and time . The method for manufacturing a vacuum insulated double container according to any one of claims 1 and 2, wherein nitrogen gas is introduced into the vacuum heating furnace with the opening of the inner cylinder closed, and the surface of the outer cylinder A method for producing a vacuum heat insulating double container, characterized in that a nitriding part is formed in 4. The method for manufacturing a vacuum insulated double container according to claim 3, wherein the inner cylinder is placed upside down on the mounting surface of the vacuum heating furnace to close the opening of the inner cylinder. A method of manufacturing a double container.