Process for combining mouth of stainless steel container with enamel inside and enamel stainless steel container

Abstract

The invention discloses an enamel-attached stainless steel container mouth combination technology and an enamel stainless steel container. The enamel stainless steel container comprises a shell and an inner container which are used for manufacturing the stainless steel container, the stainless steel container is provided with an open mouth, and the bottom of the stainless steel container is blocked; only titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is combined at the opening part of the stainless steel container to surround the opening of the container for one circle; the inner wall of the inner container of the stainless steel container is sprayed / soaked with enamel glaze, the enamel glaze completely covers the inner container of the stainless steel container, the lower portion of the enamel glaze is attached to stainless steel, and the upper portion of the enamel glaze is attached to titanium / nickel / chromium / cobalt / tungsten / molybdenum metal; sintering the container coated with the porcelain glaze; the opening of the container is polished to form a smooth outer chamfer, and redundant titanium / nickel / chromium / cobalt metal is polished away; and performing appearance treatment on the outer wall of the container. According to the method, second metal and stainless steel are fused to prevent rust water from overflowing, and the purpose of saving cost is further achieved by adopting a local fusion method.

Description

Technical Field

[0001] The invention belongs to the field of containers, relates to an enamel container, and in particular to a mouth combination process of an enamel-stainless steel container. Background Art

[0002] The enameled container consists of metal on the outside and an enamel layer on the inner surface of the metal.

[0003] The principle is that the enamel is sprayed or dipped on the inner wall of the stainless steel container, and sintered at a high temperature of about 700-900 degrees. The enamel is formed into a hard layer on the inner surface of the stainless steel. Then the burnt stainless steel outer wall is polished to make it a bright layer or painted.

[0004] The above process is an existing public structure, such as a porcelain enameled stainless steel thermos cup and a manufacturing method thereof disclosed in patent announcement number CN108903545A, and a corrosion-resistant porcelain enameled material and a preparation method thereof disclosed in CN113832406B.

[0005] The existing problem is that for stainless steel enamel without curling at the mouth of the container, the stainless steel layer will produce oxides after being heated at high temperature (not produced at low temperature), that is, the above substances exist between the stainless steel layer and the enamel layer. The mouth of the container generally needs to be chamfered and polished, and the stainless steel layer and the enamel layer are clearly separated, and the rust water produced by the oxide will seep out from the separation. Therefore, after the container is used for a long time, there will be a rusty taste when drinking water. Summary of the invention

[0006] The invention provides an enamel container mouth bonding process and an enamel container, which are convenient for preventing rusty water from being generated between a stainless steel shell and an enamel inner container, and the process consumes very little cost for solving the problem.

[0007] The technical solution adopted by the present invention to solve the above technical problems is: a stainless steel container mouth bonding process with internal enamel, comprising the following process steps: S1, manufacturing a shell and an inner liner of a stainless steel container, wherein the stainless steel container is provided with an opening, and the bottom of the stainless steel container is sealed; S2, titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is combined only at the mouth of the stainless steel container, and the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal surrounds the container mouth; S3, spraying / dipping enamel glaze on the inner wall of the inner tank of the stainless steel container, the enamel glaze completely covers the inner tank of the stainless steel container, the lower part of the enamel is attached to the stainless steel, and the upper part of the enamel is attached to the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal; S4, the enamel-coated container is sintered at a temperature of 700-900 degrees; S5, after sintering, the mouth of the container is polished to form a smooth outer chamfer, and the excess titanium / nickel / chromium / cobalt metal is polished off; the outer wall of the container is subjected to appearance treatment.

[0008] Furthermore, the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal described in S2 includes titanium metal; or titanium-based metal; or nickel-based metal; or chromium-based metal; cobalt-based metal; molybdenum-based metal or tungsten carbide, which is coated, sintered, clad, or sprayed on the mouth of stainless steel; the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is fused with the stainless steel surface.

[0009] Furthermore, when the container mouth in S2 is combined with titanium / nickel / chromium / cobalt / tungsten / molybdenum metal, the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is higher than the upper edge of the stainless steel mouth. In S5, the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is polished above the upper edge of the stainless steel so that the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal extends downward from the upper edge of the mouth to a depth of only 1-10 mm.

[0010] Furthermore, the enamel on the inner side of the container mouth after grinding in S5 is not higher than the upper edge of the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal.

[0011] Furthermore, the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal described in S2 spans the connection between the shell and the liner.

[0012] Furthermore, in S5, the outer wall treatment of the container includes polishing / plastic spraying / sticker / electroplating.

[0013] Another subject is a stainless steel container with enamel inside, the stainless steel container comprises a shell and an inner liner made of stainless steel, the enamel is attached to the stainless steel inner liner, and the stainless steel container has an open mouth; Titanium / nickel / chromium / cobalt / tungsten / molybdenum metals are only combined at the mouth of the stainless steel container, and the titanium / nickel / chromium / cobalt / tungsten / molybdenum metals surround the mouth of the container. The titanium / nickel / chromium / cobalt / tungsten / molybdenum metal extends only 1-10mm from the upper edge of the mouth; Titanium / nickel / chromium / cobalt / tungsten / molybdenum metals are formed into one piece by coating, sintering / cladding / spraying on the mouth of the stainless steel surface. The glaze completely covers the inner liner of the stainless steel container. The bottom of the glaze is attached to the stainless steel, and the top of the glaze is attached to the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal.

[0014] Furthermore, the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal includes titanium metal; or titanium-based metal; or nickel-based metal; or chromium-based metal; cobalt-based metal; molybdenum-based metal or tungsten carbide.

[0015] Furthermore, the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal spans the connection between the shell and the liner.

[0016] Another technical solution is a process for bonding the mouth of a stainless steel container with an inner enamel, which is characterized by comprising the following process steps: Independent process one S1, manufacturing an inner liner of a stainless steel container, wherein the inner liner is provided with an open mouth; S2, titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is only combined at the mouth of the stainless steel liner, and titanium / nickel / chromium / cobalt / tungsten / molybdenum metal surrounds the mouth; S3, spray / dip enamel on the inner wall of the stainless steel inner tank, the enamel completely covers the inner tank, the lower part of the enamel is attached to the stainless steel, and the upper part of the enamel is attached to the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal; S4, the enamel-coated inner tank is sintered at a temperature of 700-900 degrees; Independent process 2 S5, manufacturing the shell of the stainless steel container; Combine independent process 1 with independent process 2 S6, combining the inner liner and the shell to form the stainless steel container, with a vacuum layer provided between the inner liner and the shell; S7, grind the mouth to form a smooth chamfer, grind off the excess titanium / nickel / chromium / cobalt metal; perform appearance treatment on the outer wall of the shell.

[0017] The titanium / nickel / chromium / cobalt / tungsten / molybdenum metal described in S2 includes titanium metal; or titanium-based metal; or nickel-based metal; or chromium-based metal; cobalt-based metal; molybdenum-based metal or tungsten carbide, which is coated, sintered, clad, or sprayed at the mouth; titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is surface-fused with stainless steel.

[0018] When the container mouth in S2 is combined with titanium / nickel / chromium / cobalt / tungsten / molybdenum metal, the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is higher than the upper edge of the outlet. In S7, the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is polished above the upper edge of the stainless steel so that the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal extends downward from the upper edge of the mouth to a depth of only 1-10 mm.

[0019] In S7, the enamel on the inside of the mouth after polishing is no higher than the upper edge of the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal.

[0020] Another technical solution is a process for bonding the mouth of a stainless steel container with an inner enamel, which is characterized by comprising the following process steps: Independent process one S1, manufacturing an inner liner of a stainless steel container, wherein the inner liner is provided with an open mouth; S2, titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is only combined at the mouth of the stainless steel liner, and titanium / nickel / chromium / cobalt / tungsten / molybdenum metal surrounds the mouth; S3, spray / dip enamel on the inner wall of the stainless steel inner tank, the enamel completely covers the inner tank, the lower part of the enamel is attached to the stainless steel, and the upper part of the enamel is attached to the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal; S4, the enamel-coated inner tank is sintered at a temperature of 700-900 degrees; S5, polish the mouth to remove the excess titanium / nickel / chromium / cobalt metal; Independent process 2 S6, manufacturing the shell of the stainless steel container; Combine independent process 1 with independent process 2 S6, combining the inner liner and the shell to form the stainless steel container, with a vacuum layer provided between the inner liner and the shell; S7, grinding the opening of the combined stainless steel container to form a smooth chamfer, and performing appearance treatment on the outer wall of the shell.

[0021] The titanium / nickel / chromium / cobalt / tungsten / molybdenum metal described in S2 includes titanium metal; or titanium-based metal; or nickel-based metal; or chromium-based metal; cobalt-based metal; molybdenum-based metal or tungsten carbide, which is coated, sintered, clad, or sprayed at the mouth; titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is surface-fused with stainless steel.

[0022] When the container mouth in S2 is combined with titanium / nickel / chromium / cobalt / tungsten / molybdenum metal, the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is higher than the upper edge of the outlet. In S5, the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is polished above the upper edge of the stainless steel so that the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal extends downward from the upper edge of the mouth to a depth of only 1-10 mm.

[0023] In S6, the enamel on the inside of the mouth after polishing is no higher than the upper edge of the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal.

[0024] Compared with the prior art, the advantage of the present invention is that it solves the problem of rust generated at the container mouth when stainless steel and enamel are sintered at high temperature. The second metal is fused with the stainless steel so that the second metal blocks the oxide layer channel between the stainless steel and the enamel layer, thereby preventing the rust water formed by the oxide from overflowing.

[0025] The present invention adopts a partial fusion method, stainless steel and the second metal molecules are combined, and no oxide is generated at the junction of metal and metal. At the same time, because the second metal is generally more expensive than stainless steel, the partial fusion technology further achieves the purpose of cost saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0027] Figure 1 For salt spray test Figure 1 .

[0028] Figure 2 For salt spray test Figure 2 .

[0029] Figure 3 This is a schematic diagram of the distribution between the layers of the containers of Example 1 and Example 2.

[0030] Figure 4 Polishing the container Figure 1 .

[0031] Figure 5 Schematic diagram of the distribution between the layers of the containers of Example 3 and Example 4.

[0032] Figure 6 Schematic diagram of polishing the container Figure 2 .

[0033] In the figure, 1 is a shell; 2 is an inner liner; 3 is titanium / nickel / chromium / cobalt / tungsten / molybdenum metal; 4 is porcelain enamel. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that these descriptions are only illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0035] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings. Example 1

[0036] For existing stainless steel enamel containers, there are mainly two types: those with curled edges and those without curled edges. It is easier to prevent rust on the mouth of the container with curled edges. However, the stainless steel layer of the container without curled edges will produce oxides after high temperature heating (a necessary step for enamel 4) (not produced at low temperature), that is, the above substances exist between the stainless steel layer and the enamel 4 layer. The mouth of the container generally needs to be chamfered and polished, and the stainless steel layer and the enamel 4 layer are clearly separated. The rust water produced by the oxide will seep out from the separation. Therefore, after long-term use of the container, there will be a rusty taste when drinking water.

[0037] Figure 3-Figure 4 As shown, the process steps for combining the mouth of the stainless steel container with internal enamel of the present invention are as follows: S1. Manufacture the shell 1 and the liner 2 of the stainless steel container. Taking a thermos cup as an example, the shell 1 and the liner 2 are welded by a cylinder, a cavity is set between the shell 1 and the liner 2, the bottom of the stainless steel container is sealed, the cavity is evacuated, and an open mouth is set in the stainless steel container.

[0038] S2, only the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 is combined at the mouth of the stainless steel container, and the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 surrounds the container mouth to form a thin layer. This is a surface bonding technology, which only fuses a layer of metal on the surface of the stainless steel container mouth.

[0039] The titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 includes titanium metal; or titanium-based (alloy) metal; or nickel-based (alloy) metal; or chromium-based (alloy) metal; cobalt-based (alloy) metal; molybdenum-based (alloy) metal or tungsten carbide.

[0040] By coating sintering / cladding / spraying on the mouth of stainless steel; titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 is fused with stainless steel.

[0041] Coating sintering can apply titanium / nickel / chromium / cobalt / tungsten / molybdenum metal powders to the mouth of a stainless steel container and use a welding gun for high-temperature fusion; cladding can use a laser to perform high-temperature fusion of titanium / nickel / chromium / cobalt / tungsten / molybdenum metal powders attached to the mouth of a stainless steel container. It is a local surface fusion technology that adds cladding material to the surface of the stainless steel and uses a high-energy-density laser beam to melt it together with a thin layer on the surface of the stainless steel to form a metallurgically bonded additive cladding layer on the surface of the stainless steel. This is the most preferred process, which is characterized by low manufacturing cost, simple operation and good effect; spraying can heat and melt titanium / nickel / chromium / cobalt / tungsten / molybdenum metal powders, and impact them on the upper edge of the mouth of the stainless steel container under high-speed gas conveyance, where they accumulate and solidify to form a film thickness or coating.

[0042] The titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 is higher than the upper edge of the stainless steel mouth, which is convenient for the attachment of the enamel 4 and the subsequent polishing.

[0043] Preferably, the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 spans the welding joint between the shell 1 and the inner tank 2. The welding joint understood here is not covered by the glaze 4, and the welding joint is located at the mouth, that is, the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 forms a circle of edge cover.

[0044] S3, spraying / dipping enamel 4 on the inner wall of the inner liner 2 of the stainless steel container, the enamel 4 completely covers the inner liner 2 of the stainless steel container, this process is also a relatively conventional technology.

[0045] Then, the bottom of the glaze 4 is attached to the stainless steel material, and the top of the glaze 4 is attached to the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3.

[0046] S4, the container coated with the enamel 4 is sintered at a temperature of 700-900 degrees, preferably 800-880 degrees. Multiple containers can be assembled and sintered together. The purpose of sintering is to solidify the enamel 4.

[0047] S5, after sintering, the mouth of the container is polished to form a smooth outer chamfer, and the excess titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 is polished off.

[0048] The part above the upper edge of the stainless steel is polished, and the polishing degree is slight, just for the roundness of the mouth. Finally, the depth of the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 extending downward from the upper edge of the mouth is only 1-10mm. This step can be controlled in S2, that is, the width of a circle of titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 is controlled to be 1-10mm, preferably 2mm, so that the cost can be further controlled.

[0049] After polishing, the enamel on the inner side of the container mouth is at the same height as the upper edge of the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 or the enamel is lower than the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3. The above setting is to prevent the lower plane of the lid from contacting and rubbing with the enamel, causing enamel wear.

[0050] Then the outer wall of the container is processed, which can be polishing / spraying / sticker / electroplating.

[0051] When titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 is fused with stainless steel, the stainless steel and titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 are molecularly bonded when heated at high temperature, and no rust will be produced, and there will be no stratification like between stainless steel and enamel 4.

[0052] The bottom of the container is a combination of stainless steel and enamel 4, but the mouth has been blocked by titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3, so there will be no rust between the layers, and it will not affect the taste. The above laminated structure is more reliable than ordinary electroplating rust prevention.

[0053] The following are the rust test instructions: Example 2

[0054] The present invention is an enameled stainless steel container. Figure 3 As shown, the stainless steel container includes a shell 1 and an inner liner 2 made of stainless steel. The shell 1 and the inner liner 2 are welded by a cylinder. A cavity is provided between the shell 1 and the inner liner 2. The bottom of the stainless steel container is sealed, and the cavity is evacuated. The stainless steel container is provided with an open mouth.

[0055] Enamel is attached to the inner liner 2 of the stainless steel, and titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 is combined only on the mouth surface of the stainless steel container. The titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 surrounds the mouth of the container. The titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 includes titanium metal; or titanium-based (alloy) metal; or nickel-based (alloy) metal; or chromium-based (alloy) metal; cobalt-based (alloy) metal; molybdenum-based (alloy) metal or tungsten carbide.

[0056] The titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 is fused with the stainless steel by coating, sintering / cladding / spraying on the mouth of the stainless steel container, and the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 is formed into one piece by coating, sintering / cladding / spraying on the mouth of the stainless steel.

[0057] The titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 extends downward from the upper edge of the mouth only to a depth of 1-10 mm, preferably 2 mm.

[0058] The enamel 4 completely covers the stainless steel container liner 2, the enamel 4 is attached to the stainless steel below, and the enamel 4 is attached to the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 above. Preferably, the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 spans the weld between the shell 1 and the liner 2, and the weld understood here is not covered by the enamel 4, the weld is located at the mouth, and the weld is a separate joint and rust may also be generated.

[0059] The enamel on the inside of the container mouth is not higher than the upper edge of the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3. Example 3

[0060] For existing stainless steel enamel containers, there are mainly two types: those with curled edges and those without curled edges. It is easier to prevent rust on the mouth of the container with curled edges. However, the stainless steel layer of the container without curled edges will produce oxides after high temperature heating (a necessary step for enamel 4) (not produced at low temperature), that is, the above substances exist between the stainless steel layer and the enamel 4 layer. The mouth of the container generally needs to be chamfered and polished, and the stainless steel layer and the enamel 4 layer are clearly separated. The rust water produced by the oxide will seep out from the separation. Therefore, after long-term use of the container, there will be a rusty taste when drinking water.

[0061] Figure 5-Figure 6 The process steps of the present invention are as follows: Independent process 1, this step can be produced by one producer: S1, manufacturing a stainless steel inner liner 2 of a stainless steel container, wherein the inner liner 2 is provided with an opening.

[0062] S2, titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 is only combined at the mouth of the inner liner 2, and the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 surrounds the container mouth to form a thin layer. This is a surface bonding technology, and only a layer of metal is fused on the inner surface of the mouth.

[0063] The titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 includes titanium metal; or titanium-based (alloy) metal; or nickel-based (alloy) metal; or chromium-based (alloy) metal; cobalt-based (alloy) metal; molybdenum-based (alloy) metal or tungsten carbide.

[0064] By coating sintering / cladding / spraying at the mouth; titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 is fused with stainless steel.

[0065] Coating sintering can apply titanium / nickel / chromium / cobalt / tungsten / molybdenum metal powders to the mouth of a stainless steel container and use a welding gun for high-temperature fusion; cladding can use a laser to perform high-temperature fusion of titanium / nickel / chromium / cobalt / tungsten / molybdenum metal powders attached to the mouth of a stainless steel container. It is a local surface fusion technology that adds cladding material to the surface of the stainless steel and uses a high-energy-density laser beam to melt it together with a thin layer on the surface of the stainless steel to form a metallurgically bonded additive cladding layer on the surface of the stainless steel. This is the most preferred process, which is characterized by low manufacturing cost, simple operation and good effect; spraying can heat and melt titanium / nickel / chromium / cobalt / tungsten / molybdenum metal powders, and impact them on the upper edge of the mouth under high-speed gas conveyance, where they accumulate and solidify to form a film thickness or coating.

[0066] Preferably, the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 can be higher than the upper edge of the mouth of the inner tank 2, so as to facilitate the attachment of the glaze 4 and the subsequent polishing.

[0067] S3, spraying / dipping enamel 4 on the inner wall of the inner tank 2, the enamel 4 completely covers the inner tank 2, this process is also a relatively conventional technology. The innovation is that the bottom of the enamel 4 is attached to the stainless steel material, and the top of the enamel 4 is attached to the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3.

[0068] S4, the inner container 2 coated with the enamel 4 is sintered at a temperature of 700-900 degrees, preferably 800-880 degrees. Multiple inner containers 2 can be assembled and sintered together. The purpose of sintering is to solidify the enamel 4.

[0069] Then comes the independent process 2, which can be produced by the same manufacturer or separately: S5, manufacturing the shell 1 of the stainless steel container.

[0070] Combine independent process 1 with independent process 2 S6, combining the inner liner 2 and the shell 1 to form the stainless steel container, with a vacuum layer provided between the inner liner 2 and the shell 1, and the combination is carried out by welding.

[0071] S7, after welding, the weld and the mouth are polished to form a smooth chamfer, and the excess titanium / nickel / chromium / cobalt metal is polished off; the upper edge portion protruding from the stainless steel is polished, and the degree of polishing is slight, just for the roundness of the mouth. Finally, the depth of the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 extending downward from the upper edge of the mouth is only 1-10mm, preferably 2mm, which can further control the cost.

[0072] After polishing, the enamel on the inner side of the container mouth is at the same height as the upper edge of the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 or the enamel is lower than the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3. The above setting is to prevent the lower plane of the lid from contacting and rubbing with the enamel, causing enamel wear.

[0073] Finally, the outer wall of the container can be processed by polishing / plastic spraying / sticker / electroplating.

[0074] When titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 is fused with stainless steel, the stainless steel and titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 are molecularly bonded when heated at high temperature, and no rust will be produced, and there will be no stratification like between stainless steel and enamel 4.

[0075] The bottom of the inner pot 2 is a combination of stainless steel and enamel 4, but the mouth has been blocked by titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3, so there will be no rust between the layers, and it will not affect the taste. The above laminated structure is more reliable than ordinary electroplating rust prevention. Example 4

[0076] Figure 5-Figure 6 The process steps of the present invention are as follows: Independent process 1, this step can be produced by one producer: S1, manufacturing a stainless steel inner liner 2 of a stainless steel container, wherein the inner liner 2 is provided with an opening.

[0077] S2, titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 is only combined at the mouth of the inner liner 2, and the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 surrounds the container mouth to form a thin layer. This is a surface bonding technology, and only a layer of metal is fused on the inner surface of the mouth.

[0078] The titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 includes titanium metal; or titanium-based (alloy) metal; or nickel-based (alloy) metal; or chromium-based (alloy) metal; cobalt-based (alloy) metal; molybdenum-based (alloy) metal or tungsten carbide.

[0079] By coating sintering / cladding / spraying at the mouth; titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 is fused with stainless steel.

[0080] Coating sintering can apply titanium / nickel / chromium / cobalt / tungsten / molybdenum metal powders to the mouth of a stainless steel container and use a welding gun for high-temperature fusion; cladding can use a laser to perform high-temperature fusion of titanium / nickel / chromium / cobalt / tungsten / molybdenum metal powders attached to the mouth of a stainless steel container. It is a local surface fusion technology that adds cladding material to the surface of the stainless steel and uses a high-energy-density laser beam to melt it together with a thin layer on the surface of the stainless steel to form a metallurgically bonded additive cladding layer on the surface of the stainless steel. This is the most preferred process, which is characterized by low manufacturing cost, simple operation and good effect; spraying can heat and melt titanium / nickel / chromium / cobalt / tungsten / molybdenum metal powders, and impact them on the upper edge of the mouth under high-speed gas conveyance, where they accumulate and solidify to form a film thickness or coating.

[0081] Preferably, the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 can be higher than the upper edge of the mouth of the inner tank 2, so as to facilitate the attachment of the glaze 4 and the subsequent polishing.

[0082] S3, spraying / dipping enamel 4 on the inner wall of the inner tank 2, the enamel 4 completely covers the inner tank 2, this process is also a relatively conventional technology. The innovation is that the bottom of the enamel 4 is attached to the stainless steel material, and the top of the enamel 4 is attached to the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3.

[0083] S4, the inner container 2 coated with the enamel 4 is sintered at a temperature of 700-900 degrees, preferably 800-880 degrees. Multiple inner containers 2 can be assembled and sintered together. The purpose of sintering is to solidify the enamel 4.

[0084] S5, grind the mouth to form a smooth chamfer and grind off the excess titanium / nickel / chromium / cobalt metal; grind the upper edge portion above the stainless steel, the degree of grinding is slight, just for the roundness of the mouth, and finally the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 extends downward from the upper edge of the mouth to a depth of only 1-10mm, preferably 2mm, which can further control the cost.

[0085] Then there is the independent process 2, which can be produced by the same producer or separately: S6, manufacturing the shell 1 of the stainless steel container.

[0086] Combine independent process one with independent process two: S7, combining the inner liner 2 and the shell 1 to form the stainless steel container, with a vacuum layer provided between the inner liner 2 and the shell 1, and the combination is carried out by welding.

[0087] S7, grind the weld after welding.

[0088] S8, the final treatment of the outer wall of the container can be polishing / plastic spraying / sticker / electroplating.

[0089] When titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 is fused with stainless steel, the stainless steel and titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3 are molecularly bonded when heated at high temperature, and no rust will be produced, and there will be no stratification like between stainless steel and enamel 4.

[0090] The bottom of the inner pot 2 is a combination of stainless steel and enamel 4, but the mouth has been blocked by titanium / nickel / chromium / cobalt / tungsten / molybdenum metal 3, so there will be no rust between the layers, and it will not affect the taste. The above laminated structure is more reliable than ordinary electroplating rust prevention.

[0091] The present invention is introduced above, and specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the present invention and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. The process of combining the mouth of a stainless steel container with an inner enamel is characterized by: The process steps include: S1, manufacturing a shell and an inner liner of a stainless steel container, wherein the stainless steel container is provided with an opening, and the bottom of the stainless steel container is sealed; S2, titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is combined only at the mouth of the stainless steel container, and the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal surrounds the container mouth; S3, spraying / dipping enamel glaze on the inner wall of the inner tank of the stainless steel container, the enamel glaze completely covers the inner tank of the stainless steel container, the lower part of the enamel is attached to the stainless steel, and the upper part of the enamel is attached to the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal; S4, the enamel-coated container is sintered at a temperature of 700-900 degrees; S5, after sintering, the mouth of the container is polished to form a smooth outer chamfer, and the excess titanium / nickel / chromium / cobalt metal is polished off; the outer wall of the container is subjected to appearance treatment.

2. The process for joining the mouth of a stainless steel container with internal enamel according to claim 1 is characterized in that: The titanium / nickel / chromium / cobalt / tungsten / molybdenum metal described in S2 includes titanium metal; or titanium-based metal; or nickel-based metal; or chromium-based metal; cobalt-based metal; molybdenum-based metal or tungsten carbide, which is coated, sintered, clad, or sprayed on the mouth of stainless steel; titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is surface-fused with stainless steel.

3. The process for joining the mouth of a stainless steel container with internal enamel according to claim 1 or 2, characterized in that: When the container mouth in S2 is combined with titanium / nickel / chromium / cobalt / tungsten / molybdenum metal, the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is higher than the upper edge of the stainless steel mouth. In S5, the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is polished above the upper edge of the stainless steel so that the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal extends downward from the upper edge of the mouth to a depth of only 1-10 mm.

4. The process for joining the mouth of a stainless steel container with internal enamel according to claim 1, characterized in that: In S5, the enamel on the inside of the container mouth after grinding is no higher than the upper edge of the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal.

5. The process for joining the mouth of a stainless steel container with internal enamel according to claim 1 or 2, characterized in that: The titanium / nickel / chromium / cobalt / tungsten / molybdenum metal described in S2 spans the connection between the shell and the liner.

6. The process for joining the mouth of a stainless steel container with internal enamel according to claim 1, characterized in that: In S5, the outer wall treatment of the container includes polishing / plastic spraying / sticker / electroplating.

7. Enameled stainless steel container, the stainless steel container comprises a shell and an inner liner made of stainless steel, the enamel is attached to the stainless steel inner liner, and the stainless steel container has an open mouth; It is characterized in that Titanium / nickel / chromium / cobalt / tungsten / molybdenum metals are only combined at the mouth of the stainless steel container, and the titanium / nickel / chromium / cobalt / tungsten / molybdenum metals surround the mouth of the container. The titanium / nickel / chromium / cobalt / tungsten / molybdenum metal extends only 1-10mm from the upper edge of the mouth; Titanium / nickel / chromium / cobalt / tungsten / molybdenum metals are formed into one piece on the mouth surface of stainless steel by coating, sintering / cladding / spraying. The glaze completely covers the inner liner of the stainless steel container. The bottom of the glaze is attached to the stainless steel, and the top of the glaze is attached to the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal. The enamel on the inside of the container mouth is not higher than the upper edge of the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal.

8. The enameled stainless steel container according to claim 7, characterized in that: The titanium / nickel / chromium / cobalt / tungsten / molybdenum metal includes titanium metal; or titanium-based metal; or nickel-based metal; or chromium-based metal; cobalt-based metal; molybdenum-based metal or tungsten carbide.

9. The enameled stainless steel container according to claim 7, characterized in that: The titanium / nickel / chromium / cobalt / tungsten / molybdenum metal spans the junction between the shell and the liner.

10. The process for joining the mouth of a stainless steel container with an inner enamel is characterized by: The process steps include: Independent process one S1, manufacturing an inner liner of a stainless steel container, wherein the inner liner is provided with an open mouth; S2, titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is only combined at the mouth of the stainless steel liner, and titanium / nickel / chromium / cobalt / tungsten / molybdenum metal surrounds the mouth; S3, spray / dip enamel on the inner wall of the stainless steel inner tank, the enamel completely covers the inner tank, the lower part of the enamel is attached to the stainless steel, and the upper part of the enamel is attached to the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal; S4, the enamel-coated inner tank is sintered at a temperature of 700-900 degrees; Independent process 2 S5, manufacturing the shell of the stainless steel container; Combine independent process 1 with independent process 2 S6, combining the inner liner and the shell to form the stainless steel container, with a vacuum layer provided between the inner liner and the shell; S7, grind the mouth to form a smooth chamfer, grind off the excess titanium / nickel / chromium / cobalt metal; perform appearance treatment on the outer wall of the shell.

11. The process for joining the mouth of a stainless steel container with internal enamel according to claim 10, characterized in that: The titanium / nickel / chromium / cobalt / tungsten / molybdenum metal described in S2 includes titanium metal; or titanium-based metal; or nickel-based metal; or chromium-based metal; cobalt-based metal; molybdenum-based metal or tungsten carbide, which is coated, sintered, clad, or sprayed at the mouth; titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is surface-fused with stainless steel.

12. The process for joining the mouth of a stainless steel container with internal enamel according to claim 10 or 11, characterized in that: When the container mouth in S2 is combined with titanium / nickel / chromium / cobalt / tungsten / molybdenum metal, the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is higher than the upper edge of the outlet. In S7, the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is polished above the upper edge of the stainless steel so that the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal extends downward from the upper edge of the mouth to a depth of only 1-10 mm.

13. The process for joining the mouth of a stainless steel container with internal enamel according to claim 10, characterized in that: In S7, the enamel on the inside of the mouth after polishing is no higher than the upper edge of the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal.

14. A process for joining the mouth of a stainless steel container with an inner enamel, characterized in that The process steps include: Independent process one S1, manufacturing an inner liner of a stainless steel container, wherein the inner liner is provided with an open mouth; S2, titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is only combined at the mouth of the stainless steel liner, and titanium / nickel / chromium / cobalt / tungsten / molybdenum metal surrounds the mouth; S3, spray / dip enamel on the inner wall of the stainless steel inner tank, the enamel completely covers the inner tank, the lower part of the enamel is attached to the stainless steel, and the upper part of the enamel is attached to the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal; S4, the enamel-coated inner tank is sintered at a temperature of 700-900 degrees; S5, polish the mouth to remove the excess titanium / nickel / chromium / cobalt metal; Independent process 2 S6, manufacturing the shell of the stainless steel container; Combine independent process 1 with independent process 2 S6, combining the inner liner and the shell to form the stainless steel container, with a vacuum layer provided between the inner liner and the shell; S7, grinding the opening of the combined stainless steel container to form a smooth chamfer, and performing appearance treatment on the outer wall of the shell.

15. The process for joining the mouth of a stainless steel container with internal enamel according to claim 14, characterized in that: The titanium / nickel / chromium / cobalt / tungsten / molybdenum metal described in S2 includes titanium metal; or titanium-based metal; or nickel-based metal; or chromium-based metal; cobalt-based metal; molybdenum-based metal or tungsten carbide, which is coated, sintered, clad, or sprayed at the mouth; titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is surface-fused with stainless steel.

16. The process for joining the mouth of a stainless steel container with internal enamel according to claim 14 or 15, characterized in that: When the container mouth in S2 is combined with titanium / nickel / chromium / cobalt / tungsten / molybdenum metal, the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is higher than the upper edge of the outlet. In S5, the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal is polished above the upper edge of the stainless steel so that the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal extends downward from the upper edge of the mouth to a depth of only 1-10 mm.

17. The process for joining the mouth of a stainless steel container with internal enamel according to claim 14, characterized in that: In S6, the enamel on the inside of the mouth after polishing is no higher than the upper edge of the titanium / nickel / chromium / cobalt / tungsten / molybdenum metal.

Images