JP2012097310A - Method of manufacturing vacuum heat insulation double container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a vacuum heat insulation double container with a very high commercial value.SOLUTION: The method of manufacturing a vacuum heat insulation double container is such that a metal inner cylinder 2 is arranged in a metal outer cylinder 1 through a space S, and the space S between the outer cylinder 1 and the inner cylinder 2 is made a vacuum heat insulation space, and is characterized in that while heating a process object 3 consisting of the outer cylinder 1 and the inner cylinder 2 by a vacuum heating furnace, the space S of the process object 3 is deaerated, and a deaeration hole is vacuum locked, then a nitrogen gas is introduced into the vacuum heating furnace, and a nitrided part 10 is formed on a surface of the process object 3, and the nitrided part 10 is ground.

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 vacuum insulation is provided in which a metal inner cylinder 2 is disposed in a metal outer cylinder 1 through a space S, and the space S between the outer cylinder 1 and the inner cylinder 2 is a vacuum heat insulation space. In the method for manufacturing a double container, the space S of the object to be treated 3 is degassed and removed while the object to be treated 3 comprising the outer cylinder 1 and the inner cylinder 2 is heated in a vacuum heating furnace 6. The pores are vacuum-sealed, and then a nitrogen gas T is introduced into the vacuum heating furnace 6 to form a nitriding portion 10 on the surface of the object 3 to be processed, and the nitriding portion 10 is polished. The present invention relates to a method for manufacturing a vacuum insulated double container.

  Moreover, the metal inner cylinder 2 is arrange | positioned through the space part S in the metal outer cylinder 1, and the space part S between the said outer cylinder 1 and the said inner cylinder 2 is made into a vacuum heat insulation space part. A method for manufacturing a vacuum insulated double container, wherein the object 3 comprising the outer cylinder 1 and the inner cylinder 2 is heated in a vacuum heating furnace 6 while the space S of the object 3 is degassed. The deaeration holes are vacuum-sealed, and then the object to be processed 3 is cooled. Subsequently, the object to be processed 3 is heated in the vacuum heating furnace 6, and then the nitrogen gas T is placed in the vacuum heating furnace 6. Is applied to form a nitriding portion 10 on the surface of the object 3 to be processed, and the nitriding portion 10 is polished.

  Moreover, in the manufacturing method of the vacuum heat insulation double container of any one of Claim 1, 2, The said outer cylinder 1 concerns on the manufacturing method of the vacuum heat insulation double container characterized by being made from titanium. is there.

  Moreover, in the manufacturing method of the vacuum heat insulation double container of any one of Claims 1-3, when the temperature in the said vacuum heating furnace 6 becomes about 700 degrees C or less, nitrogen is contained in this vacuum heating furnace 6 The present invention relates to a method for producing a vacuum heat insulating double container characterized by introducing a gas T.

  Moreover, in the manufacturing method of the vacuum heat insulation double container of any one of Claims 1-4, nitrogen gas T is introduce | transduced in the said vacuum heating furnace 6 in the state which obstruct | occluded the opening part 3a of the said to-be-processed object 3. The present invention relates to a method for manufacturing a vacuum heat insulating double container.

  Moreover, in the manufacturing method of the vacuum heat insulation double container of any one of Claims 1-5, it is based on the manufacturing method of the vacuum heat insulation double container characterized by employ | adopting buffing as said grinding | polishing. .

  Moreover, in the manufacturing method of the vacuum heat insulation double container of any one of Claims 1-6, uneven | corrugated | grooved parts 4, 5 are formed in the surface of the said outer cylinder 1 and the said inner cylinder 2 by the pressure_rising | fluctuation by the introduction of the said nitrogen gas T. It is related with the manufacturing method of the vacuum heat insulation double container characterized by providing.

  The vacuum heat insulating double container obtained by the present invention becomes an extremely high quality vacuum heat insulating double container that exhibits an unprecedented unique texture obtained by polishing a nitrided portion formed on a metal surface. The unique texture provided on the surface of the heat insulating double container can be reliably realized because it uses nitridation by nitrogen gas used for cooling in the vacuum heating furnace when manufacturing the vacuum heat insulating double container. This is an epoch-making method for producing a vacuum insulated double container that exhibits unprecedented effects such as the ability to reliably and efficiently produce the above-described high-quality vacuum insulated double container.

It is a 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.

  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.

  The present invention degass the space S of the object to be processed 3 while heating the object to be processed 3 consisting of the outer cylinder 1 and the inner cylinder 2 in the vacuum heating furnace 6 and vacuum seals the deaeration holes, Nitrogen gas T is introduced into the vacuum heating furnace 6 to form a nitriding portion 10 on the surface of the object to be processed 3, and when the nitriding portion 10 is polished, the surface of the object to be processed 3 has a unique texture that shines black. Presents.

  Therefore, by a simple method, it is possible to manufacture a container with a completely new design that has never been seen so that the surface is black and has a unique texture.

  A specific embodiment 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.

  The outer cylinder 1 and the inner cylinder 2 according to the present embodiment are metal (titanium) bottomed cylindrical bodies as shown in FIGS. 1 and 2, and the inner cylinder 2 is in comparison with the outer cylinder 1. The diameter is small and the height is set low, and the openings 1a and 2a are set to have substantially the same diameter. The material constituting the outer cylinder 1 and the inner cylinder 2 may be other metals such as stainless steel.

  Therefore, when the inner cylinder 2 is arranged in the outer cylinder 1 and the openings 1 a and 2 a are joined to each other, a space S is formed between the outer cylinder 1 and the inner cylinder 2.

  In addition, the titanium in this specification shows pure titanium and a titanium alloy. 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 appropriately selected in consideration of the formation of the concavo-convex portions 4 and 5 to such an extent that the function) is not lowered.

  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 provided with an infinite number of concave and convex portions 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 above outer cylinder 1 and the inner cylinder 2 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 (argon welding), and the object to be processed 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 and the deaeration hole 1b 'is vacuum-sealed.

  Specifically, as shown in FIGS. 3 and 4, the workpiece 3 is placed in the vacuum superheated 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 vacuum state (10 ⁻³ to 10 ⁻⁴ 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. 5).

  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. Then, the uneven portions 4 and 5 are formed. At this time, the temperature is lowered to room temperature to cool the workpiece 3 and the vacuum sealing operation is completed.

Specifically, the temperature in the vacuum heating furnace 6 is about 800 ° C. or more (about 1,050 ° C. exceeding the recrystallization temperature of titanium and exceeding the transformation point of 880 ° C. (temperature at which the α structure is changed to the β structure)). And a vacuum state (10 ⁻³ to 10 ⁻⁴ Torr), and this state is maintained for 15 to 20 minutes. At this time, the outer cylinder 1 and the inner cylinder 2 of the workpiece 3 are recrystallized (having an α structure), and the ductility is increased (the crystal grains are coarsened in the portion that is not recrystallized). 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 reason for returning to the atmospheric pressure state (introducing nitrogen gas) at a temperature lower than 700 ° C. is that 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. 5), 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 previously fitted to each object 3 during this vacuum sealing operation, and each object is covered during rapid cooling using nitrogen gas T. The treatment body 3 is prevented from touching the nitrogen gas T. In the vacuum sealing operation, the cover body is fitted to the object 3 to be processed. When a titanium brazing material is used as the brazing material 7, when the nitrogen gas T is touched at a high temperature, the performance as the brazing material sharply decreases. This is because the brazing material 7 does not touch the nitrogen gas T. Note that argon gas may be used when the object to be processed 3 is cooled so as not to form the nitriding portion 10.

  Subsequently, a nitride portion 10 (nitride layer / nitride film) is formed on the surface of the workpiece 3 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 when heated in the same manner as described above and rapidly cooled using the nitrogen gas T, the object to be processed 3 is obtained. A nitriding portion 10 is formed on the surface of the substrate by touching the nitrogen gas T. The nitriding portion 10 is black and frosted. Note that the inner surface of the object to be processed 3 (the inner surface of the inner cylinder 2) is not nitrided because it does not touch the nitrogen gas T, and exhibits a texture shining in the color of the material (titanium) (see FIG. 1).

  Subsequently, the nitriding portion 10 of the workpiece 3 is polished and completed.

  Specifically, in this embodiment, as shown in FIG. 7, the nitriding portion 10 formed on the surface of the object 3 is buffed (the surface of the object 3 is pressed against the buff 9 rotating at high speed). The surface of the object 3 to be processed after the nitriding portion 10 has been polished exhibits a unique texture that shines in black (light density is black).

  In this embodiment, in order to form the recesses 4 and 5 satisfactorily, the heating / cooling normal pressure treatment for cooling the workpiece 3 after heating is performed a plurality of times (total) before the nitriding portion 10 is polished. 2 times), but only once during the vacuum sealing operation. In this case, the process is performed in a state in which the cover body is not fitted to the object 3 to be processed, and the vacuum sealing operation and the forming operation of the nitriding unit 10 are performed simultaneously.

  Since the present embodiment is configured as described above, it is possible to obtain an extremely high-quality vacuum insulated double container that exhibits an unprecedented unique texture obtained by polishing the nitride portion 10 formed on the titanium surface. In addition, the unique texture provided on the surface of the vacuum insulated double container utilizes nitridation by nitrogen gas when cooling the inside of the vacuum heating furnace when manufacturing the vacuum insulated double container. Therefore, the high-quality vacuum insulated double container described above can be reliably and efficiently manufactured.

  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.

  Further, in the present embodiment, not only the outer cylinder 1 but also the inner cylinder 2 is made of titanium, so that the quality can be further enhanced by making it all titanium.

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

S space part T nitrogen gas 1 outer cylinder 2 inner cylinder 3 to-be-processed object 3a opening part 4 uneven part 5 uneven part 6 vacuum heating furnace
10 Nitriding part

Claims (7)

  A method for manufacturing a vacuum insulated double container in which a metal inner cylinder is disposed in a metal outer cylinder via a space, and the space between the outer cylinder and the inner cylinder is a vacuum heat insulating space. The process object comprising the outer cylinder and the inner cylinder is heated in a vacuum heating furnace to degas the space of the process object and vacuum seal the deaeration holes, and then the vacuum heating A method for producing a vacuum insulated double container, wherein nitrogen gas is introduced into a furnace to form a nitriding portion on the surface of the object to be processed, and the nitriding portion is polished.   A method for manufacturing a vacuum insulated double container in which a metal inner cylinder is disposed in a metal outer cylinder via a space, and the space between the outer cylinder and the inner cylinder is a vacuum heat insulating space. The object to be processed comprising the outer cylinder and the inner cylinder is heated in a vacuum heating furnace to deaerate the space of the object to be processed and the deaeration holes are vacuum-sealed, and then the object to be processed The body is cooled, and then the object to be processed is heated in the vacuum heating furnace, and then a nitrogen gas is introduced into the vacuum heating furnace to form a nitriding portion on the surface of the object to be processed. A method for producing a vacuum insulated double container, characterized by polishing a part.   The method for manufacturing a vacuum insulated double container according to any one of claims 1 and 2, wherein the outer cylinder is made of titanium.   In the manufacturing method of the vacuum heat insulation double container of any one of Claims 1-3, when the temperature in the said vacuum heating furnace becomes about 700 degrees C or less, nitrogen gas is introduce | transduced in this vacuum heating furnace. A method for producing a vacuum insulated double container characterized by the above.   In the manufacturing method of the vacuum heat insulation double container of any one of Claims 1-4, nitrogen gas is introduce | transduced in the said vacuum heating furnace in the state which obstruct | occluded the opening part of the said to-be-processed object. A method for manufacturing a vacuum insulated double container.   The manufacturing method of the vacuum heat insulation double container of any one of Claims 1-5 WHEREIN: Buffing was employ | adopted as the said grinding | polishing.   In the manufacturing method of the vacuum heat insulation double container of any one of Claims 1-6, an uneven | corrugated | grooved part is provided in the surface of the said outer cylinder and the said inner cylinder by the pressurization by introduction | transduction of the said nitrogen gas, The vacuum characterized by the above-mentioned. A method of manufacturing an insulated double container.