Containers and methods for manufacturing containers

Abstract

Provided is a container that is resistant to external force and heat despite the use of a pottery.　A cup (1A) serving as a container is provided with: an outer container part (2) having translucency; an inner container part (3) disposed inside the outer container part (2) at a gap therefrom and joined to the outer container part (2); and a pottery (5) movably disposed in an inner space (4) formed by the gap between the outer container part (2) and the inner container part (3).

Description

Technical Field

[0001] The present invention relates to a container and a method for manufacturing the container.

Background Art

[0002] Conventionally, various containers using ceramics have been proposed. As an example of such a container, there is one composed of ceramics and a glass coating portion adhered to all outer peripheral surfaces of the ceramics (see Patent Document 1).

[0003] In the container of this conventional example, the internal ceramics can be visually observed through the glass coating portion. Ceramics can exhibit a unique design that cannot be expressed by other materials, and there is an advantage that this can be visually observed.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the above conventional example, since the ceramics and the glass coating portion are adhered and fixed, there is a problem that the ceramics may be thermally damaged (broken, discolored, etc.) due to the difference in the thermal expansion coefficients of the two materials. Also, since the ceramics and the glass coating portion are adhered and fixed, there is a problem that external force or heat from the glass coating portion directly acts on the internal ceramics, and the ceramics are easily damaged by external force or heat from the outside.

[0006] As mentioned above, ceramics can express unique designs that cannot be achieved with other materials, so there is a strong desire to develop containers that are resistant to external forces and heat by combining ceramics with other materials. If such containers are developed, it is expected that not only the ceramics industry but also the industries of materials used with ceramics (for example, the glass industry) will be revitalized and expanded.

[0007] Therefore, the present invention aims to provide a container that is resistant to external forces and heat despite being made of ceramics, and a method for manufacturing such a container. [Means for solving the problem]

[0008] This invention was made in view of the above problems. It has a side portion and a bottom portion that closes the bottom surface of the side portion, A light-transmitting outer container portion, and arranged inside the outer container portion, Having a side portion and a bottom portion that closes the bottom surface of the side portion An inner container portion joined to the outer container portion, and the outer container portion The side portion and the bottom portion and the inner container portion The side portion and the bottom portion The internal space formed between them Among these, at least are located in the region between the side surface of the outer container portion and the side surface of the inner container portion, and within the internal space move freely This container is characterized by having ceramics arranged in a specific way.

[0009] Other inventions include, A method for manufacturing a container comprising: an outer container portion having a side portion and a bottom portion that closes the bottom of the side portion and being translucent; an inner container portion arranged inside the outer container portion and joined to the outer container portion, having a side portion and a bottom portion that closes the bottom of the side portion; and a ceramic material that is at least placed in the region between the side portion of the outer container portion and the side portion of the inner container portion within the internal space formed between the side portion and the bottom portion of the outer container portion and the side portion and the bottom portion of the inner container portion, and that is movable within the internal space, the method for manufacturing a container comprising: an outer container portion having a side portion and a bottom portion that closes the bottom of the side portion and being translucent; an inner container portion having a side portion and a bottom portion that closes the bottom of the side portion and being joined to the outer container portion; and a ceramic material that is at least placed in the region between the side portion of the outer container portion and the side portion of the inner container portion within the internal space formed between the side portion and the bottom portion of the outer container portion and is movable within the internal space, the method for manufacturing a container comprising: outer container part, The aforementioned Inner container section and The aforementioned A method for manufacturing a container, comprising: a parts manufacturing step for each ceramic component; a parts assembly step for assembling the outer container and inner container in a temporary joint state, with the ceramic component placed in the gap between the outer container and the inner container; and a welding step for heating and welding the joint between the outer container and the inner container to form a joint. [Effects of the Invention]

[0010] According to the present invention, the ceramic is movable within the internal space surrounded by the outer and inner container portions, and is not fixed to either the outer or inner container portion. Therefore, it is not susceptible to thermal damage caused by differences in thermal expansion coefficients between the outer and inner container portions. Furthermore, compared to cases where the ceramic is in close contact with the outer and inner container portions, it does not receive direct heat or external forces from the outer or inner container portions, thus suppressing damage from heat and external forces. As a result, a container that is resistant to external forces and heat can be provided despite using ceramics. Moreover, ceramics can express a wide variety of unique and elaborate designs that cannot be expressed with other materials, and a container can be provided in which the design of the ceramic is visible through the outer container portion. [Brief explanation of the drawing]

[0011] The drawings illustrate specific embodiments of the present invention relating to this disclosure, including not only essential components of the invention but also optional and preferred embodiments. [Figure 1] The first embodiment is shown, where (a) is a front view of the cup and (b) is an enlarged view of part Ib in (a). [Figure 2] This is a cross-sectional view of a cup, showing the first embodiment. [Figure 3] This is an exploded perspective view showing the first embodiment before the cups are joined (welded). [Figure 4] A second embodiment is shown, where (a) is a front view of the cup and (b) is an enlarged view of part IVb of (a). [Figure 5] A second embodiment is shown, which is a cross-sectional view of a cup. [Figure 6] This shows a second embodiment, an exploded perspective view of the cups before joining (welding). [Figure 7] A third embodiment is shown, where (a) is a front view of the cup and (b) is an enlarged view of part VIIb of (a). [Figure 8] This shows a third embodiment, a cross-sectional view of a cup. [Figure 9] This shows a third embodiment, an exploded perspective view of the cups before joining (welding). [Figure 10]Shows the manufacturing method of the cup of the second embodiment, and is a perspective view of the main part of the processing apparatus. [Figure 11] Shows the manufacturing method of the cup of the second embodiment, and is a plan view of the main part of the processing apparatus showing the process of attaching the cup to the processing apparatus. [Figure 12] Shows the manufacturing method of the cup of the second embodiment. (a) is a plan view of the main part of the processing apparatus showing the welding process of the cup, and (b) is a view seen from the direction of arrow XIIb in (a). [Figure 13] Shows the manufacturing method of the cup of the second embodiment. (a) is a front view of the main part of the processing apparatus showing the welding process of the cup, and (b) is a view seen from the direction of arrow XIIIb in (a). [Figure 14] Shows the manufacturing method of a modified example of the cup of the second embodiment, and is a schematic diagram explaining the actions of heating by the flame of the burner, heat insulation of the flame by the carbon panel, and cooling by the blowing of the blowing means.

Embodiments for Carrying Out the Invention

[0012] Hereinafter, each embodiment will be described in detail with reference to the accompanying drawings. In this embodiment, descriptions of technologies that are already known will be omitted. Also, what is illustrated is an apparatus and method for embodying the technical idea of the invention, and the technical idea of the present invention is not limited to the following. The technical idea of the present invention can be variously modified within the scope of the matters described in the claims. In particular, it should be noted that the drawings are schematic and different from the actual ones.

[0013] A container is a receptacle and is not limited by the contents. That is, the contents are not limited by foodstuffs, solids, granular substances, fluids, etc. In this embodiment, a cup for containing a fluid, a drink, will be described as an example.

[0014] (First Embodiment) Figures 1 to 3 show a first embodiment of the present invention. As shown in Figures 1 to 3, the container, a cup 1A, comprises an outer container portion 2, an inner container portion 3 positioned inside the outer container portion 2 with a gap between them and joined to the outer container portion 2, and a ceramic 5 that is movably disposed in the internal space 4 formed by the gap between the outer container portion 2 and the inner container portion 3.

[0015] The outer container portion 2 has a substantially frustoconical side portion 2a and a bottom portion 2b that closes the bottom surface of the side portion 2a, with the top surface of the side portion 2a being open.

[0016] The outer container part 2 is made of translucent glass. In other words, the inside can be seen from the outside of the outer container part 2. The inner container portion 3 has a side portion 3a that is slightly smaller in diameter than the outer container portion 2 but is roughly frustoconical in shape, and a bottom portion 3b that closes the bottom surface of the side portion 3a, with the top surface of the side portion 3a being open.

[0017] The inner container section 3, like the outer container section 2, is made of translucent glass. In other words, the contents can be seen from the inside of the inner container section 3.

[0018] The upper ends of the outer container section 2 and the inner container section 3 are set to the same height when they are stacked on top of each other, and both upper ends are connected by a joint 6 around their entire circumference. The joint 6 forms the drinking spout. The joint 6 is formed by welding the upper ends of both the outer container section 2 and the inner container section 3 together by flame firing, as described below. Therefore, the surface of the joint 6 is formed in an arc shape by surface tension during the solidification process of the molten glass material (see Figure 1(b)).

[0019] As described above, both the outer container section 2 and the inner container section 3 are made of glass, and more specifically, borosilicate glass.

[0020] The internal space 4 between the outer container portion 2 and the inner container portion 3 has a shape that is continuous between the side portions 2a, 3a and the bottom portions 2b, 3b of both sides.

[0021] The ceramic vessel 5 has a frustoconical side portion 5a and a bottom portion 5b that closes the bottom surface of the side portion 5a. The ceramic vessel 5 is arranged across the internal space 4 region of the side portions 2a and 3a of the outer container portion 2 and the inner container portion 3, and the internal space 4 region of the bottom portions 2b and 3b of the inner container portion 3 of the outer container portion 2.

[0022] The ceramic 5 is not fixed to either the outer container portion 2 or the inner container portion 3, but is movably positioned in the internal space 4. In this first embodiment, it is positioned to be slightly movable in the vertical direction and slightly more movable in the horizontal (lateral) direction than in the vertical direction.

[0023] The design is displayed on the outer surface of ceramic 5, but the illustration is omitted. Ceramics 5 is a material containing 60% or more silica and feldspar (Na, K, Ca, Ba)(Si, Al) 408.

[0024] As described above, in the first embodiment, the cup 1A comprises a translucent outer container portion 2, an inner container portion 3 positioned inside the outer container portion 2 with a gap between them and joined to the outer container portion 2, and a ceramic 5 movably positioned in the internal space 4 formed by the gap between the outer container portion 2 and the inner container portion 3.

[0025] Therefore, the ceramic 5 is movable in the internal space 4 surrounded by the outer container portion 2 and the inner container portion 3, and is not fixed to either the outer container portion 2 or the inner container portion 3. As a result, it is not subjected to thermal damage caused by the difference in thermal expansion coefficients between the outer container portion 2 and the inner container portion 3. In other words, if the ceramic 5 were fixed to the outer container portion 2 or the inner container portion 3, thermal stress or other factors would act on the ceramic 5 at the fixing point due to the difference in thermal expansion coefficients, potentially causing damage (breakage, stress, etc.). However, the ceramic 5 is not subjected to such damage.

[0026] Furthermore, compared to when the ceramic 5 is in close contact with the outer container 2 or inner container 3, it does not receive direct heat or external force from the outer container 2 or inner container 3, thus suppressing damage from heat and external force. Therefore, even though ceramic 5 is used, a cup 1A that is resistant to external force and heat can be provided.

[0027] Furthermore, since cup 1A has an internal space 4 between the outer container part 2 and the inner container part 3, it has good heat insulation and therefore excellent heat retention.

[0028] In this first embodiment, the inner container portion 3 is translucent. Therefore, the ceramic 5 can be seen through the inner container portion 3, and thus the design on the back side of the ceramic 5 can be seen.

[0029] In this first embodiment, the upper ends of the outer container portion 2 and the inner container portion 3 are formed at the same height, and the upper ends of both the outer container portion 2 and the inner container portion 3 are joined by the joint portion 6. Therefore, because the storage space for the ceramics 5 is large, there is a high degree of freedom in the dimensions of the ceramics 5. In other words, it is possible to set it so that ceramics 5 that are slightly shorter in dimensions than the height of the outer container portion 2 and the inner container portion 3 can also be stored.

[0030] In this first embodiment, the ceramic 5 is positioned to be movable both vertically and horizontally within the internal space 4. Therefore, the user can hear a sound when shaking the cup 1A vertically or horizontally. The ceramic 5 moves vertically and the user can hear a sound each time they drink the beverage in the cup 1A.

[0031] In this first embodiment, the outer container portion 2 and the inner container portion 3 are made of glass. Therefore, since the entire outer surface of the cup 1A is made of glass, it is superior in terms of hygiene compared to other materials. Glass is inferior to plastic compared to other materials, but is generally superior in terms of productivity, etc.

[0032] In this first embodiment, the outer container portion 2 and the inner container portion 3 are specifically made of borosilicate glass. Therefore, since borosilicate glass has a thermal expansion coefficient of 30 × (10 to the power of 7), which is about one-third that of ordinary glass, thermal stress caused by temperature differences is reduced, resulting in cup 1A that is resistant to thermal damage. Borosilicate glass has a heat resistance temperature of 450°C, which is higher than that of ordinary glass, so in this respect as well, cup 1A is resistant to thermal damage.

[0033] In this first embodiment, the ceramic material 5 is made of a material containing 60% or more silica and feldspar (Na, K, Ca, Ba)(Si, Al) 408. Therefore, the ceramic material 5 has strong heat resistance and will not crack when heated to high temperatures.

[0034] (Second Embodiment) Figures 4 to 6 show a second embodiment of the present invention. As shown in Figures 4 to 6, the cup 1B, which is the container of this second embodiment, differs from that of the first embodiment only in the following configuration.

[0035] In other words, the upper end of the outer container portion 2 is set lower than the upper end of the inner container portion 3 when superimposed on the inner container portion 3. More specifically, the side portion 3a of the inner container portion 3 is composed of a frustocone 3c whose lower end is continuous with the bottom portion 3b, an enlarged frustocone 3d which is continuous with the upper end of the frustocone 3c and has a large inclination angle, and a cylindrical portion 3e which is connected from the upper end of the enlarged frustocone 3d. The outer container portion 2 is set to the same height as the upper end of the enlarged cone frustum 3d of the inner container portion 3 when superimposed on it. The outer container portion 2 is joined to the inner container portion 3 at its upper end by a joint portion 6. Specifically, the joint portion 6 is formed by welding the upper end of the outer container portion 2 to the corresponding upper end of the enlarged cone frustum 3d of the inner container portion 3. Therefore, the joint portion 6 is formed in an arc shape by surface tension during the solidification process of the molten glass material (see Figure 4(b)). In this second embodiment, the upper end of the inner container portion 3, that is, the upper end of the cylindrical portion 3e, forms the drinking spout.

[0036] The ceramic vessel 5 has only a truncated cone-shaped side portion 5a and does not have a bottom portion as in the first embodiment. Therefore, the ceramic vessel 5 is positioned in the internal space 4 region of the side portions 2a and 3a of both the outer container portion 2 and the inner container portion 3.

[0037] In this second embodiment, the ceramic piece 5 is positioned to be highly mobile in the vertical direction and slightly mobile in the horizontal (lateral) direction.

[0038] Other components are the same as those in the first embodiment, and their descriptions are omitted to avoid redundant explanation. In Figures 4 to 6, components identical to those in the first embodiment are denoted by the same reference numerals for clarity.

[0039] As explained above, this second embodiment has substantially the same effects as the first embodiment. That is, since the ceramic 5 is not fixed to both the outer container portion 2 and the inner container portion 3, it is not affected by damage caused by the difference in thermal expansion coefficients between the outer container portion 2 and the inner container portion 3. Furthermore, compared to the case where the ceramic 5 is in close contact with the outer container portion 2 and the inner container portion 3, it does not receive heat or external force directly from the outer container portion 2 and the inner container portion 3, thus suppressing damage from heat and external force. As a result, despite using ceramic 5, it is possible to provide a cup 1B that is resistant to external force and heat, among other effects.

[0040] In this second embodiment, the upper end of the outer container portion 2 is set lower than the upper end of the inner container portion 3, and the upper end of the outer container portion 2 is joined to the inner container portion 3 by a joint portion 6. Therefore, the part above the outer container portion 2 is a single-layer structure of the inner container portion 3 (specifically, a structure consisting only of the cylindrical portion 3e), which allows for weight reduction and reduction of material costs compared to the case where the outer container portion 2 and inner container portion 3 are a two-layer structure up to the upper end (in the case of the first embodiment).

[0041] (Third embodiment) Figures 7 to 9 show a third embodiment of the present invention. As shown in Figures 7 to 9, the cup 1C, which is the container of this third embodiment, differs from that of the second embodiment only in the following configuration. In other words, the side surface 3a of the inner container portion 3 is composed of a frustocone 3c whose lower end is continuous with the bottom surface 3b, a stepped cylindrical portion 3f which is continuous with the upper end of the frustocone 3c, and a cylindrical portion 3e which is connected to the upper end of the stepped cylindrical portion 3f. The lower end surface 3g of the stepped cylindrical portion 3f protrudes outward from the upper end of the frustocone 3c, and the gap d (shown in Figure 7(b)) between the outer surface of the stepped cylindrical portion 3f and the inner surface of the side surface 2a of the outer container portion 2 is set to a small size that prevents the ceramic 5 from fitting inside. As a result, the ceramic 5 is set to be able to move only slightly in the vertical direction compared to that of the second embodiment. Other components are the same as those in the second embodiment, and their descriptions are omitted to avoid redundant explanation. In Figures 7 to 9, components identical to those in the second embodiment are denoted by the same reference numerals for clarity.

[0042] As explained above, this third embodiment has substantially the same effects as the first embodiment. That is, since the ceramic 5 is not fixed to both the outer container portion 2 and the inner container portion 3, it is not affected by damage caused by the difference in thermal expansion coefficients between the outer container portion 2 and the inner container portion 3. Furthermore, compared to the case where the ceramic 5 is in close contact with the outer container portion 2 and the inner container portion 3, the ceramic 5 does not receive direct heat or external force from the outer container portion 2 and the inner container portion 3, thus suppressing damage from heat and external force. As a result, despite using ceramic 5, it is possible to provide a cup 1C that is resistant to external force and heat, among other effects.

[0043] In this third embodiment, as in the second embodiment, the upper end of the outer container portion 2 is set lower than the upper end of the inner container portion 3, and the upper end of the outer container portion 2 is joined to the inner container portion 3 by a joint portion 6. Therefore, since the structure above the outer container portion 2 is a single layer structure of the inner container portion 3 (specifically, a structure consisting only of the cylindrical portion 3e), weight reduction and material cost reduction can be achieved compared to the case where the outer container portion 2 and inner container portion 3 are a two-layer structure up to the upper end (in the case of the first embodiment).

[0044] (How to manufacture a cup) Next, the manufacturing method of cup 1B of the second embodiment will be explained as an example. The processing apparatus 10 shown in Figure 10 is used to manufacture cup 1B. The processing apparatus 10 has a first holding part 11 and a second holding part 12 that are arranged opposite each other, and the first holding part 11 and the second holding part 12 are provided to be movable in the direction of proximity and the direction of separation, respectively. The first holding part 11 has gripping parts 11a that protrude at three locations in the circumferential direction with respect to the rotation center, and these three gripping parts 11a grip the outer container part 2. The second holding part 12 has a frustoconical insertion jig 12a, and the inner container part 3 is held by fitting this insertion jig 12a into the internal space of the inner container part 3. The three gripping parts 11a of the first holding part 11 and the insertion jig 12a of the second holding part 12 are provided to be rotatable at the same speed with respect to the same axis of rotation.

[0045] The processing apparatus 10 is equipped with a burner 15, which is a heating means, and a carbon panel 17, which is a heat shielding member. The burner 15 emits a flame toward the cup 1B attached to the processing apparatus 10. It is preferable that the burner 15 has a narrow flame emission range and can emit heat precisely to the joining (welding) area.

[0046] The carbon panel 17 is positioned near the burner 15. The carbon panel 17 has an arc-shaped recess 17a. The recess 17a is formed to fit almost seamlessly around the outer circumference of the outer container portion 2 near the joint (welding) area (see Figure 13(b)). The tip of the carbon panel 17, the inclined portion 17b, is inclined toward the upper end of the inner container portion 3 (see Figure 13(a)).

[0047] Next, the manufacturing process of cup 1B will be explained. The manufacturing process of cup 1B mainly consists of a parts manufacturing process, a parts assembly process, and a welding process. In the parts manufacturing process, the outer container part 2, the inner container part 3, and the ceramic part 5 are each manufactured separately. The outer container part 2 and the inner container part 3 are manufactured, for example, by the glassblowing method. The outer container part 2 is manufactured to have a ventilation hole 2c (shown in Figure 6) in the bottom surface part 2b. The ceramic part 5 is manufactured, for example, by mixing clay with powder of a predetermined material such as feldspar, molding, and firing.

[0048] In the parts assembly process, as shown in Figure 11, the outer container portion 2 is rotatably attached to the three gripping portions 11a of the first holding portion 11, and the inner container portion 3 is rotatably attached to the insertion jig 12a of the second holding portion 12. Then, the ceramic 5 is temporarily placed on top of the outer container portion 2 or on the outside of the inner container portion 3, and the distance between the first holding portion 11 and the second holding portion 12 is narrowed so that the ceramic 5 is sandwiched between the outer container portion 2 and the inner container portion 3, and the outer container portion 2 and the inner container portion 3 are assembled in a temporarily joined state (see Figures 10 and 11).

[0049] In the welding process, as shown in Figures 12 and 13, the outer container portion 2 and the inner container portion 3 are rotated together by the rotation of the three gripping portions 11a of the first holding portion 11 and the insertion jig 12a of the second holding portion 12, and the joint between the outer container portion 2 and the inner container portion 3 is heated with a burner 15 to weld them together. In this second embodiment, the joint (welding) location of the outer container portion 2 and the inner container portion 3 is the upper end of the outer container portion 2 and the corresponding location on the inner container portion 3, and the entire circumference of this location is heated. As a result, the glass material at the upper end of the outer container portion 2 and the corresponding location on the inner container portion 3 melts and mixes together. Then, as the temperature drops after heating, it solidifies and the joint portion 6 is formed.

[0050] During the solidification process caused by the decrease in temperature of the glass material, the surface of the joint 6 is formed in an outward-projecting arc shape due to the surface tension of the glass material (see Figure 4(b)). The joint 6 and the surrounding surface continuous with it are then connected by a smooth curve without any irregularities.

[0051] After forming the joint 6 in this manner, the manufacturing process is completed by filling the ventilation holes (2c) of the outer container part 2 with the melting and solidification of glass material.

[0052] Next, the heating of the joint area by the burner 15 described above will be explained in more detail. A carbon panel 17 is placed on the outer circumference of the outer container 2 between the flame of the burner 15 and the position of the ceramic 5. The carbon panel 17 prevents the flame of the burner 15 from scattering towards the ceramic 5, thus preventing flame entrapment. Since the carbon panel 17 has a sloping tip 17b, the flame emitted from the burner 15 changes direction after hitting the joint area, moving away from the ceramic 5. This also suppresses damage to the ceramic 5 due to heating.

[0053] The carbon panel 17 prevents the ceramic 5 from rapidly increasing in temperature due to its heat shielding against flames, thus preventing the ceramic 5 from suffering thermal damage (such as breakage, discoloration, or deformation).

[0054] As a pre-heating step before heating with the burner 15, the ceramic 5 is gradually heated for 3 minutes to preheat it to approximately 590°C. Performing this pre-heating step prevents rapid temperature changes during the welding process, thus preventing heat damage during the welding process.

[0055] The welding process and subsequent temperature control are described below. The upper edge of the rotating outer container section 2 and the corresponding joint area of ​​the inner container section 3 are heated to 1000°C to 1200°C for 3 to 6 minutes, then rapidly cooled to 590°C, and then slowly cooled to room temperature over 90 to 120 minutes. By performing this temperature control, abrupt temperature changes after the welding process can be prevented, thus preventing heat damage during the welding process.

[0056] As described above, the manufacturing method of cup 1B comprises a parts manufacturing step of manufacturing the outer container part 2, the inner container part 3, and the ceramic part 5 respectively; a parts assembly step of assembling the outer container part 2 and the inner container part 3 in a temporary joint state, with the ceramic part 5 placed in the gap between the outer container part 2 and the inner container part 3; and a welding step of heating and welding the joint between the outer container part 2 and the inner container part 3 to form a joint part 6.

[0057] More specifically, the manufacturing method for cup 1B includes a parts manufacturing step of manufacturing the outer container part 2, the inner container part 3, and the ceramic part 5, respectively; a parts assembly step of rotatably attaching the outer container part 2 to the first holding part 11, rotatably attaching the inner container part 3 to the second holding part 12 which is positioned opposite the first holding part 11, temporarily placing the ceramic part 5 on top of the outer container part 2 or outside the inner container part 3, narrowing the distance between the first holding part 11 and the second holding part 12, and assembling the outer container part 2 and the inner container part 3 in a temporarily joined state with the ceramic part 5 positioned between the outer container part 2 and the inner container part 3; and a welding step of heating and welding the joint between the outer container part 2 and the inner container part 3 to form a joint part 6 while the outer container part 11 and the inner container part 12 rotate together as the first holding part 11 and the second holding part 12 rotate.

[0058] The cup 1B manufactured in this manner has the following effects: The ceramic 5 is not subjected to thermal damage caused by the difference in thermal expansion coefficients between the outer container portion 2 and the inner container portion 3. Furthermore, since the ceramic 5 is not directly subjected to heat or external forces from the outer container portion 2 or the inner container portion 3, damage from heat and external forces is suppressed. As a result, a cup 1B that is resistant to external forces and heat can be manufactured despite using ceramic 5. In addition, since the cup 1B has an internal space 4 between the outer container portion 2 and the inner container portion 3, it has good heat insulation properties and therefore excellent heat retention.

[0059] In the parts manufacturing process, the outer container section 2 and the inner container section 3 are manufactured, for example, by a glassblowing method. While this glassblowing method can accurately produce the outer diameter dimensions of the outer container section 2 and the inner container section 3, it is difficult to accurately produce the wall thickness. In other words, it is not possible to accurately produce the inner diameter dimensions of the outer container section 2. However, in the cup 1B of the second embodiment (the same applies to the cup 1A of the first embodiment), a movable ceramic 5 is placed in the internal space 4, so it is possible to design the cup to have a large tolerance for the dimensional error of the internal space 4 from the beginning. By making such a design, manufacturing can be made easier. Moreover, it is possible to provide products in which the sound generated by the movement of the ceramic 5 differs from product to product.

[0060] Since the manufacturing methods for the cups 1A and 1C of the first and third embodiments are substantially the same as those of the second embodiment described above, we will avoid redundant explanations and only explain the differences. In other words, in the cup 1A of the first embodiment, the joining (welding) locations are the upper ends of both the outer container portion 2 and the inner container portion 3, and these upper ends are heated around their entire circumference. As a result, the glass materials at the upper ends of the outer container portion 2 and the inner container portion 3 melt and mix together. Then, as the temperature drops after heating, they solidify and the joint portion 6 is formed.

[0061] During the solidification of the glass material, the surface shape of the joint 6 is formed into an outward-projecting arc shape due to the surface tension of the glass material (see Figure 1(b)). The joint 6 and the surrounding surface continuous with it are connected by a smooth curve without any irregularities. In the cup 1A of the first embodiment, the joint 6 becomes the drinking rim, and the drinking rim is formed in a shape that is comfortable against the lips. Therefore, no additional processing is required to form the drinking rim. The manufacturing of cup 1C in the third embodiment is the same as that of cup 1B in the second embodiment.

[0062] (Variations in the manufacturing method) As shown by dashed lines in Figures 10 to 13, the processing apparatus 10 may be provided with a blower 16. The blower 16 is positioned on the side of the first holding part 11 that is closer to the joint (welding) point between the outer container part 2 and the inner container part 3. In other words, the blower 16 blows air toward the outer circumferential surface of the outer container part 2 in which the ceramic 5 is contained. The blower 16 may be positioned in two or more locations.

[0063] When heating the joint area (the region indicated by G in Figure 14) with the burner 17, the blower 16 blows air (cooling air) to the outer circumference of the outer container 2 on the ceramic 5 side. This blowing air suppresses the temperature rise of the ceramic 5 inside the outer container 2. Furthermore, the air blown by the blower 16 is blocked by the carbon panel 17 and does not blow onto the joint area where the burner 15 flame hits. As a result, the joint area where the burner 15 flame hits does not experience a temperature drop due to the blowing air and is reliably heated to the predetermined temperature by the burner 15.

[0064] In other words, the heat shielding from the flames by the carbon panel 17 and the airflow provided by the air blowing means 16 prevent the ceramic 5 from rapidly rising in temperature, thereby more reliably preventing the ceramic 5 from suffering thermal damage (breakage, discoloration, deformation, etc.).

[0065] (Variations of the first to third embodiments) In the first to third embodiments, there is one ceramic 5 placed in the internal space 4, but multiple ceramics may be placed. The ceramic 5 can be porcelain or earthenware, and both are applicable in this invention. In the first to third embodiments, the internal space 4 is a single space, but it may also be multiple spaces. In the first to third embodiments, both the outer container portion 2 and the inner container portion 3 are translucent, but the inner container portion 3 may be configured so that light does not pass through it. In the first to third embodiments, the joint 6 between the outer container portion 2 and the inner container portion 3 was formed by welding, but it may also be formed by adhesive or mechanical joining. However, welding is preferred because there is a risk of deterioration over time, corrosion peeling, damage, etc. In the first to third embodiments, the outer container portion 2 and the inner container portion 3 are made of glass, but they may be made of materials other than glass. In the first to third embodiments, the outer container portion 2 and the inner container portion 3 are made of borosilicate glass, but they may be made of glass other than borosilicate glass. For example, they may be made of quartz glass. Since quartz glass has the same coefficient of thermal expansion and heat resistance temperature as borosilicate glass, it will result in a container that is similarly resistant to heat damage. In the first to third embodiments, the ceramic material 5 may be a material containing sintered alumina. By including sintered alumina, the melting point of the ceramic material 5 is increased, resulting in cups 1A to 1C with excellent heat resistance. The ceramic material 5 also includes ordinary pottery, which is more brittle than porcelain or clay containing alumina. In the first to third embodiments, the container is a cup 1A to 1C, but the present invention can also be applied to containers other than cups.

[0066] Although each embodiment has been described in detail above, the invention is not limited to any particular embodiment, and various modifications and changes are possible within the scope described in the claims. Furthermore, it is possible to combine all or more of the components of the embodiments described above.

[0067] The present invention described above may include at least the following embodiments. These embodiments may be adopted separately or in combination with each other. (1) The inner container portion is a translucent container. (2) The upper ends of the outer container portion and the inner container portion are formed at the same height, and the upper ends of both the outer container portion and the inner container portion are joined by a joint. (3) The upper end of the outer container portion is formed lower than the upper end of the inner container portion, and the upper end of the outer container portion is joined to the outer container portion by a joint. (4) The outer container portion and the inner container portion are glass containers. (5) The outer container portion and the inner container portion are containers made of borosilicate glass or quartz glass. (6) The ceramics mentioned above are porcelain or earthenware containers. (7) The ceramic container is made of a material that contains 60% or more silica and feldspar (Na, K, Ca, Ba)(Si, Al) 408. (8) The container manufacturing method is characterized in that the component assembly step is performed by mounting the components onto a processing device, and the welding step is performed by heating with a burner as a heating means. (9) A method for manufacturing a container in which a heat-shielding member prevents the flame of the burner from scattering onto the outer container portion on the ceramic side. (10) A method for manufacturing a container in which air is blown into the outer container portion on the ceramic side using an air blowing means. (11) A method for manufacturing a container, in which, as a step before heating with the burner, the ceramic is gradually heated for 3 minutes to give it a preheating temperature of about 590°C. (12) The welding process involves heating the joint between the inner container portion and the outer container portion to 1000°C to 1200°C for 3 to 6 minutes, then rapidly cooling to 590°C, and then cooling to room temperature over a period of 90 to 120 minutes. [Explanation of Symbols]

[0068] 1A, 1B, 1C Cups (containers) 2 Outer container part 3 Inner container part 4. Interior space 5 Ceramics 6 Joint 10 Processing equipment 15. Burner (heating means) 17. Carbon Panel (Heat Shielding Material)

Claims

1. An outer container portion having a side portion and a bottom portion that closes the bottom surface of the side portion, and being light-transmitting, An inner container portion is positioned inside the outer container portion and has a side portion and a bottom portion that closes the bottom surface of the side portion, and is joined to the outer container portion. A container characterized by comprising a ceramic object that is at least disposed in the region between the side surfaces of the outer container portion and the side surfaces of the inner container portion, and that is movable within the internal space formed between the side surfaces of the outer container portion and the bottom surface of the inner container portion.

2. The container according to claim 1, characterized in that the inner container portion is translucent.

3. The container according to claim 1, characterized in that the upper ends of the outer container portion and the inner container portion are formed at the same height, and the upper ends of both the outer container portion and the inner container portion are joined by a joint.

4. The container according to claim 1, characterized in that the upper end of the outer container portion is formed lower than the upper end of the inner container portion, and the upper end of the outer container portion is joined to the outer container portion by a joint.

5. The container according to claim 2, characterized in that the outer container portion and the inner container portion are made of glass.

6. The container according to claim 2, characterized in that the outer container portion and the inner container portion are made of borosilicate glass or quartz glass.

7. The container according to claim 1, characterized in that the ceramic is porcelain or earthenware.

8. The container according to claim 1, characterized in that the ceramic material contains 60% or more silica and feldspar (Na, K, Ca, Ba) (Si, Al) 408.

9. An outer container portion having a side portion and a bottom portion that closes the bottom surface of the side portion, and being light-transmitting, An inner container portion is positioned inside the outer container portion and has a side portion and a bottom portion that closes the bottom surface of the side portion, and is joined to the outer container portion. A method for manufacturing a container comprising: ceramics positioned in the region between the side surfaces of the outer container portion and the side surfaces of the inner container portion, within the internal space formed between the side surfaces of the outer container portion and the bottom surface of the inner container portion, and which are movable within the internal space, A method for manufacturing a container, comprising: a parts manufacturing step for manufacturing the outer container portion, the inner container portion, and the ceramic, respectively; a parts assembly step for assembling the outer container portion and the inner container portion in a temporary joint state, with the ceramic placed in the gap between the outer container portion and the inner container portion; and a welding step for heating and welding the joint between the outer container portion and the inner container portion to form a joint.

10. The method for manufacturing a container according to claim 9, characterized in that the component assembly step uses a processing device capable of attaching the outer container portion, the inner container portion, and the ceramic, and the welding step uses a burner as a heating means.

11. A method for manufacturing a container according to claim 10, characterized in that the flame of the burner is prevented from scattering to the outer container portion on the ceramic side by a heat-shielding member.

12. A method for manufacturing a container according to claim 10, characterized in that air is blown into the outer container portion on the ceramic side using a blowing means.

13. The method for manufacturing a container according to claim 10, characterized in that, as a preheating step before heating with the burner, the ceramic is gradually heated for 3 minutes to give it a preheated temperature of about 590°C.

14. The method for manufacturing a container according to claim 9, characterized in that, in the welding step, the joint between the inner container portion and the outer container portion is heated to 1000°C to 1200°C for 3 to 6 minutes, then rapidly cooled to 590°C, and then cooled to room temperature over a period of 90 to 120 minutes.

Images