阅读说明：本技术 一种铝瓶及其制备方法 (Aluminum bottle and preparation method thereof ) 是由 洪晓辉 于 2021-01-04 设计创作，主要内容包括：本发明提供了一种铝瓶及其制备方法,属于合金技术领域。本发明通过控制锰的含量为0.03～0.5wt％,能够改善结构,增强铝材的冲击力学性能；镍能够提高铝材的强度和防锈能力,锶元素能够形成铝-锶结合体,调整金属晶格晶向,改善成型,能够大幅增强柔韧性,锆元素协同作用,提高铝材的耐腐蚀性,改善表面光泽,制得的铝材质轻,且具有承压强度大的优势。(The invention provides an aluminum bottle and a preparation method thereof, and belongs to the technical field of alloys. According to the invention, the manganese content is controlled to be 0.03-0.5 wt%, so that the structure can be improved, and the impact mechanical property of the aluminum material can be enhanced; the nickel can improve the strength and the antirust capacity of the aluminum product, the strontium element can form an aluminum-strontium combination body, the crystal orientation of metal lattices is adjusted, the forming is improved, the flexibility can be greatly enhanced, the zirconium element has a synergistic effect, the corrosion resistance of the aluminum product is improved, the surface gloss is improved, and the prepared aluminum product is light in weight and has the advantage of high bearing strength.)

1. The utility model provides an aluminum bottle, its characterized in that includes undercoating, aluminum plate stratum basale, surface passivation layer, amino priming paint layer, printing pigment layer, surface lacquer inoxidizing coating and the wearing layer that stacks gradually, aluminum plate stratum basale includes the following mass percent's of element: 0.1-0.2% of Si, 0.25-0.35% of Fe, 0-0.05% of Cu, 0.03-0.5% of Mn, 0-0.03% of Mg, 0-0.05% of Zn, 0-0.05% of Ti, 0-0.03% of Ni, 0-0.05% of Sr, 0-0.05% of Zr, 0-0.05% of B and the balance of Al, wherein the mass percent of Al is more than or equal to 99.2%, and the mass percent of Si, Cu, Mg, Zn, Ti, Ni, Sr, Zr and B is not 0.

2. The aluminum bottle of claim 1, wherein the inner coating is made of an epoxy coating or a polyester coating.

3. The aluminum bottle of claim 1, wherein the wear layer is a polytetrafluoroethylene layer.

4. A method for producing an aluminum bottle as set forth in any one of claims 1 to 3, characterized by comprising the steps of:

after being mixed according to the elements of the aluminum plate substrate layer, the aluminum plate substrate layer is smelted to obtain molten aluminum;

carrying out primary slagging-off, refining and refining, secondary slagging-off, refining and degassing and cast rolling on the molten aluminum in sequence to obtain an aluminum coil blank;

sequentially carrying out primary hot casting rolling, cooling, secondary cold rolling and punching on the aluminum coil blank to obtain an aluminum block blank;

sequentially annealing and carrying out first time effect treatment on the aluminum block blank to obtain a first time effect product;

carrying out surface treatment and second aging treatment on the first aging product to obtain an aluminum material;

performing punch forming on the aluminum material to obtain a bowl-shaped aluminum block;

sequentially carrying out sheet arrangement, extrusion and surface treatment on the bowl-shaped aluminum block to obtain a tank body with a surface passivation layer;

spraying the inner surface of the tank body with the surface passivation layer to form an inner coating;

sequentially forming an amino primer layer, a printing pigment layer, a surface paint protective layer and a wear-resistant layer on the outer surface of the tank body with the surface passivation layer to obtain a treated tank body;

and necking the treated can body to obtain the aluminum bottle.

5. The preparation method of claim 4, wherein the step of forming the amino primer layer is to apply an amino paint, and the step of applying the amino paint further comprises drying at 100-200 ℃ for 5-15 minutes.

6. The preparation method of claim 4, wherein the step of forming the topcoat protective layer is to apply a topcoat protective coating, the topcoat protective coating comprises an improved polyester material and polytetrafluoroethylene, and the step of applying the topcoat protective coating further comprises drying, wherein the drying temperature is 100-200 ℃ and the drying time is 5-15 minutes.

7. The preparation method according to claim 6, wherein the mass content of the polytetrafluoroethylene in the topcoat protective coating is 0.2-0.4%.

8. The preparation method according to claim 6 or 7, wherein the step of forming the wear-resistant layer is to sequentially perform heat curing and aging treatment on the surface paint protective layer to form the wear-resistant layer on the surface of the surface paint protective layer.

9. The method according to claim 4, wherein the forming of the surface passivation layer is performed by cleaning with a cleaning solution, and the cleaning solution comprises a sodium salt, a potassium salt, a zirconium salt and a surfactant.

10. The method of claim 4, wherein the reducing is performed in 40 passes, and the reducing amount in each pass is 1-5 mm.

Technical Field

The invention relates to the technical field of alloys, in particular to an aluminum bottle and a preparation method thereof.

Background

The aluminum bottle is formed by cold extrusion deep drawing by adopting pure aluminum as a base material, the aluminum bottle is made of soft aluminum, the processing flexibility is very excellent, and the applicability of processing and forming is very high. As a new star in the field of metal packaging, aluminum bottles are highlighted in the application and packaging market of food and beverage packaging products in recent years, and are increasingly widely applied. The product application of the famous brand customers such as beer packages, soft drink packages and the like is not lacked.

The bottle weight of the current aluminum bottle technology reaches 45g by taking a 12floz aluminum bottle as a reference. With the aggravation of environmental resources and cost control, the demand of aluminum bottle light weight needs to be solved urgently. The complexity of the aluminum bottle light weight process presents huge instability along with the increase of the pipe diameter specification, and the difficulty is extremely high.

Disclosure of Invention

In view of the above, the present invention provides an aluminum bottle and a method for manufacturing the same. The aluminum bottle provided by the invention is light in weight, and the light weight of the aluminum bottle is realized.

In order to achieve the above object, the present invention provides the following technical solutions:

the invention provides an aluminum bottle which comprises an inner coating, an aluminum plate substrate layer, a surface passivation layer, an amino primer layer, a printing pigment layer, a surface paint protective layer and a wear-resistant layer which are sequentially stacked, wherein the aluminum plate substrate layer comprises the following elements in percentage by mass: 0.1-0.2% of Si, 0.25-0.35% of Fe0.25-0.35%, 0.05% of Cu0, 0.03-0.5% of Mn0.03, 0.03% of Mg0, 0.05% of Zn0, 0.05% of Ti0, 0.03% of Ni0, 0.05% of Sr0, 0.05% of Zr 0-0.05%, 0.05% of B0 and the balance of Al, wherein the mass percent of the Al is not less than 99.2%, and the mass percent of the Si, the Cu, the Mg, the Zn, the Ti, the Ni, the Sr, the Zr and the B is not 0.

Preferably, the inner coating is made of an epoxy coating or a polyester coating.

Preferably, the wear resistant layer is a polytetrafluoroethylene layer.

The invention also provides a preparation method of the aluminum bottle in the technical scheme, which comprises the following steps:

after being mixed according to the elements of the aluminum plate substrate layer, the aluminum plate substrate layer is smelted to obtain molten aluminum;

carrying out primary slagging-off, refining and refining, secondary slagging-off, refining and degassing and cast rolling on the molten aluminum in sequence to obtain an aluminum coil blank;

sequentially carrying out primary hot casting rolling, cooling, secondary cold rolling and punching on the aluminum coil blank to obtain an aluminum block blank;

sequentially annealing and carrying out first time effect treatment on the aluminum block blank to obtain a first time effect product;

carrying out surface treatment and second aging treatment on the first aging product to obtain an aluminum material;

performing punch forming on the aluminum material to obtain a bowl-shaped aluminum block;

sequentially carrying out sheet arrangement, extrusion and surface treatment on the bowl-shaped aluminum block to obtain a tank body with a surface passivation layer;

spraying the inner surface of the tank body with the surface passivation layer to form an inner coating;

sequentially forming an amino primer layer, a printing pigment layer, a surface paint protective layer and a wear-resistant layer on the outer surface of the tank body with the surface passivation layer to obtain a treated tank body;

and necking the treated can body to obtain the aluminum bottle.

Preferably, the step of forming the amino primer layer is to coat an amino paint, and the step of drying is further comprised after the amino paint is coated, wherein the drying temperature is 100-200 ℃, and the drying time is 5-15 minutes.

Preferably, the step of forming the surface paint protective layer is coating a surface paint protective coating, the surface paint protective coating comprises an improved polyester material and polytetrafluoroethylene, and drying is further performed after the surface paint protective coating is coated, wherein the drying temperature is 100-200 ℃, and the drying time is 5-15 minutes.

Preferably, the mass content of the polytetrafluoroethylene in the surface paint protective coating is 0.2-0.4%.

Preferably, the step of forming the wear-resistant layer is to sequentially perform heating curing and aging treatment on the surface paint protective layer, and form the wear-resistant layer on the surface of the surface paint protective layer.

Preferably, the surface passivation layer is formed by cleaning with a cleaning solution, wherein the cleaning solution comprises sodium salt, potassium salt, zirconium salt and a surfactant.

Preferably, the necking is performed by 40 passes of necking, and the necking amount in each pass of the process is 1-5 mm.

The invention provides an aluminum bottle which comprises an inner coating, an aluminum plate substrate layer, a surface passivation layer, an amino primer layer, a printing pigment layer, a surface paint protective layer and a wear-resistant layer which are sequentially stacked, wherein the aluminum plate substrate layer comprises the following elements in percentage by mass: 0.1-0.2% of Si, 0.25-0.35% of Fe0.25-0.35%, 0.05% of Cu0, 0.03-0.5% of Mn0.03, 0.03% of Mg0, 0.05% of Zn0, 0.05% of Ti0, 0.03% of Ni0, 0.05% of Sr0, 0.05% of Zr 0-0.05%, 0.05% of B0 and the balance of Al, wherein the mass percent of the Al is not less than 99.2%, and the mass percent of the Si, the Cu, the Mg, the Zn, the Ti, the Ni, the Sr, the Zr and the B is not 0. According to the invention, the manganese content is controlled to be 0.03-0.5 wt%, so that the structure can be improved, and the impact mechanical property of the aluminum material can be enhanced; the nickel can improve the strength and the antirust capacity of the aluminum product, the strontium element can form an aluminum-strontium combination body, the crystal orientation of metal lattices is adjusted, the forming is improved, the flexibility can be greatly enhanced, the zirconium element has a synergistic effect, the corrosion resistance of the aluminum product is improved, the surface gloss is improved, and the prepared aluminum product is light in weight and has the advantage of high bearing strength. In addition, the surface passivation layer, the amino primer layer, the printing pigment layer, the surface paint protective layer and the wear-resistant layer can improve the wear resistance and the corrosion resistance of the aluminum bottle. The aluminum material provided by the invention has the hardness of 23-30 HB, the tensile strength of 70-100 MPa, the yield strength of 35-59 MPa and the elongation at break of 40-60%, does not have oil stain, dust, air holes and slag inclusion on the surface, does not have pull marks on the surface, does not have surface tearing condition, does not have sharp burrs and pits exceeding 0.2mm, and does not have obvious texture direction on the surface. The invention takes a 12-floz aluminum bottle as an example, the bottle weight of the aluminum bottle process reaches 32g, the aluminum bottle mass is reduced by 10-30% under the condition of the same pressure-bearing strength, and meanwhile, the aluminum can with the diameter of more than D40mm is light, so that the aluminum can has the advantages of energy conservation and consumption reduction.

The invention also provides a preparation method of the aluminum bottle in the technical scheme, which comprises the following steps: after the elements of the bottom layer of the aluminum substrate are mixed according to the technical scheme, smelting is carried out to obtain molten aluminum; carrying out primary slagging-off, refining and refining, secondary slagging-off, refining and degassing and cast rolling on the molten aluminum in sequence to obtain an aluminum coil blank; sequentially carrying out primary hot casting rolling, cooling, secondary cold rolling and punching on the aluminum coil blank to obtain an aluminum block blank; sequentially annealing and carrying out first time effect treatment on the aluminum block blank to obtain a first time effect product; carrying out surface treatment and second aging treatment on the first aging product to obtain an aluminum material; performing punch forming on the aluminum material to obtain a bowl-shaped aluminum block; sequentially carrying out sheet arrangement, extrusion and surface treatment on the bowl-shaped aluminum block to obtain a tank body with a surface passivation layer; spraying the inner surface of the tank body with the surface passivation layer to form an inner coating; sequentially forming an amino primer layer, a printing pigment layer, a surface paint protective layer and a wear-resistant layer on the outer surface of the tank body with the surface passivation layer to obtain a treated tank body; and necking the treated can body to obtain the aluminum bottle. According to the invention, most impurities (large-particle foreign matters which are mixed in the aluminum alloy and mainly non-metal and iron-based infusions) and oxides can be removed by primary slagging-off, crystal grains can be refined by refining refinement, impurities (small particles which are mixed in the aluminum alloy melting and producing process and high-melting-point wastes) and oxides can be completely removed by secondary slagging-off, the melt quality can be improved by refining degassing, qualified cast-rolling materials can be conveniently produced, stress can be dispersed by annealing and first aging treatment, anisotropic stress is uniform, good metal material fluidity is provided for subsequent aluminum block forming, and the difference of the internal structures of aluminum products in different periods can be reduced by surface treatment and second aging treatment.

Drawings

FIG. 1 is a micro-topography of a substrate layer of an aluminum substrate made in example 1;

FIG. 2 is a schematic view of the overall structure of the aluminum bottle of the present invention;

fig. 3 is a schematic diagram of a layered structure of an aluminum bottle according to the present invention, wherein P1 is an aluminum substrate layer, P2 is a surface passivation layer, P3 is an amino primer layer, P5 is a printing pigment layer, P4 is a topcoat protective layer, P6 is an abrasion resistant layer, and P7 is an undercoat layer.

Detailed Description

The invention provides an aluminum bottle which comprises an inner coating, an aluminum plate substrate layer, a surface passivation layer, an amino primer layer, a printing pigment layer, a surface paint protective layer and a wear-resistant layer which are sequentially stacked, wherein the aluminum plate substrate layer comprises the following elements in percentage by mass: 0.1-0.2% of Si, 0.25-0.35% of Fe0.25-0.35%, 0.05% of Cu0, 0.03-0.5% of Mn0.03, 0.03% of Mg0, 0.05% of Zn0, 0.05% of Ti0, 0.03% of Ni0, 0.05% of Sr0, 0.05% of Zr 0-0.05%, 0.05% of B0 and the balance of Al, wherein the mass percent of the Al is not less than 99.2%, and the mass percent of the Si, the Cu, the Mg, the Zn, the Ti, the Ni, the Sr, the Zr and the B is not 0.

Fig. 2 is a schematic view of the overall structure of the aluminum bottle of the present invention, and fig. 3 is a schematic view of the layered structure of the aluminum bottle of the present invention, wherein P1 is an aluminum substrate layer, P2 is a surface passivation layer, P3 is an amino primer layer, P5 is a printing pigment layer, P4 is a surface paint protective layer, P6 is an abrasion resistant layer, and P7 is an inner coating layer.

According to the mass percentage, the aluminum plate base layer preferably comprises 0.15-0.18 wt% of Si, and the Si can enhance the strength of the aluminum bottle.

According to the mass percentage, the aluminum base layer preferably comprises 0.28-0.32 wt% of Fe, and the Fe can enhance the strength of the aluminum bottle.

The aluminum substrate base layer preferably comprises 0.01-0.03 wt% of Cu in percentage by mass, and the Cu can enhance the strength of the aluminum bottle.

According to the mass percentage, the bottom layer of the aluminum plate substrate preferably comprises 0.1-0.3 wt% of Mn, and the Mn can improve the structure and enhance the impact mechanical property of the aluminum bottle.

According to the mass percentage, the bottom layer of the aluminum plate substrate preferably comprises 0.01-0.02 wt% of Mg, and the Mg can enhance the antirust capacity of the aluminum bottle and improve the surface processing fluidity.

According to the mass percentage, the aluminum substrate bottom layer preferably comprises 0.01-0.03 wt% of Zn, and the Zn can adjust a crystal grain structure and promote the optimization of an aluminum bottle.

According to the mass percentage, the bottom layer of the aluminum plate substrate preferably comprises 0.01-0.03 wt% of Ti, and the Ti can be used as a regulator to adjust the internal crystal phase structure of the aluminum bottle and refine crystal grains.

According to the mass percentage, the bottom layer of the aluminum plate substrate preferably comprises 0.01-0.02 wt% of Ni, and the Ni can improve the strength and the antirust capacity of the aluminum bottle.

According to the mass percentage, the bottom layer of the aluminum plate substrate preferably comprises 0.01-0.03 wt% of Sr, and the strontium element can form an aluminum-strontium combination body, adjust the crystal orientation of a metal lattice, improve the forming and greatly enhance the flexibility.

According to the mass percentage, the bottom layer of the aluminum base plate preferably comprises 0.01-0.03 wt% of Zr, and the zirconium element and the strontium element have a synergistic effect, so that the corrosion resistance of the aluminum bottle is improved, and the surface gloss is improved.

In the invention, the hardness of the aluminum plate base layer is preferably 23-30 HB, the tensile strength is preferably 70-100 MPa, the yield strength is preferably 35-59 MPa, and the elongation at break is preferably 40-60%.

In the invention, the thickness of the aluminum plate base layer is preferably 0.2-0.6 mm.

In the invention, the material of the inner coating is preferably high molecular weight polyester, and the thickness of the inner coating is preferably 5-30 μm.

In the invention, the surface passivation layer is preferably made of epoxy paint or polyester paint, and the thickness of the surface passivation layer is preferably 1-5 μm.

In the invention, the amino primer layer is preferably obtained by spraying an amino primer, and the thickness of the amino primer layer is preferably 5-30 μm. In the invention, the viscosity of the amino primer is preferably 70-120 s (25 ℃).

In the present invention, the thickness of the printing pigment layer is preferably 2 to 10 μm.

In the present invention, the top coat protective layer is preferably obtained by applying a top coat protective coating, and the top coat protective coating preferably comprises an improved polyester material and polytetrafluoroethylene. In the invention, the mass content of the polytetrafluoroethylene in the surface paint protective coating is preferably 0.2-0.4%.

In the invention, the thickness of the surface paint protective layer is preferably 5-30 μm.

In the invention, the wear-resistant layer is preferably a polytetrafluoroethylene layer, the thickness of the wear-resistant layer is preferably 1-5 μm, and the diameter of polytetrafluoroethylene particles in the polytetrafluoroethylene layer is preferably 0.2-2 μm.

In the invention, the step of forming the wear-resistant layer is to form the wear-resistant layer on the surface of the surface paint protective layer after the surface paint protective layer is heated and cured.

The invention also provides a preparation method of the aluminum bottle in the technical scheme, which comprises the following steps:

after being mixed according to the elements of the aluminum plate substrate layer, the aluminum plate substrate layer is smelted to obtain molten aluminum;

carrying out primary slagging-off, refining and refining, secondary slagging-off, refining and degassing and cast rolling on the molten aluminum in sequence to obtain an aluminum coil blank;

sequentially carrying out primary hot casting rolling, cooling, secondary cold rolling and punching on the aluminum coil blank to obtain an aluminum block blank;

sequentially annealing and carrying out first time effect treatment on the aluminum block blank to obtain a first time effect product;

carrying out surface treatment and second aging treatment on the first aging product to obtain an aluminum material;

performing punch forming on the aluminum material to obtain a bowl-shaped aluminum block;

sequentially carrying out sheet arrangement, extrusion and surface treatment on the bowl-shaped aluminum block to obtain a tank body with a surface passivation layer;

spraying the inner surface of the tank body with the surface passivation layer to form an inner coating;

sequentially forming an amino primer layer, a printing pigment layer, a surface paint protective layer and a wear-resistant layer on the outer surface of the tank body with the surface passivation layer to obtain a treated tank body;

and necking the treated can body to obtain the aluminum bottle.

In the present invention, unless otherwise specified, the starting materials used are all commercially available products which are conventional in the art.

According to the technical scheme, the elements of the bottom layer of the aluminum plate substrate are mixed and then smelted to obtain the molten aluminum.

In the invention, preferably 1090 standard aluminum ingots and 3003 recycled aluminum bottles are used in the batching process, the materials are mixed, uniformly split, mixed, lifted by taking 3-10T as a unit, dispersed, started to reach 600-900 ℃ for smelting, stirred for 15-45 minutes at the rotating speed of 2-20 rpm under the disturbance of a high-pressure gas column after the molten state is maintained for 0.5-1H, and then added with Fe agent, Si agent, Cu agent, Mn agent, Mg agent, Zn agent, Ti agent, Ni agent, Zr agent and Sr agent. In the invention, the gas of the high-pressure gas column is preferably inert gas, and the pressure is preferably 2-8 bar. The 3003 recycled aluminum bottles can be used for realizing resource recycling, improving the environmental protection performance and achieving the effect of reducing the cost, and in the invention, the 3003 recycled aluminum bottles are preferably used in an amount of 10 wt% of the feed.

After the molten aluminum is obtained, the invention carries out primary slag skimming, refining and refining, secondary slag skimming, refining and degassing and cast rolling on the molten aluminum in sequence to obtain the aluminum coil blank.

In the present invention, the primary skimming preferably stirs the molten aluminum using an air column.

In the invention, preferably, the method further comprises sampling analysis and secondary adjustment after the primary slagging-off is finished, wherein the secondary adjustment can be used for adding an alloying agent to adjust the content of each element in the alloy to be consistent with the scheme.

In the invention, the secondary slagging-off preferably adopts a TI-B refiner, the TI-B refiner preferably comprises TiB particles and a rare earth refiner, the dosage of the TI-B refiner is preferably 0.08 wt% of the molten aluminum, the dosage of the TiB refiner is preferably 0.05-0.07 wt%, and the dosage of the rare earth refiner is preferably 0.01-0.03 wt%. The method uses the TiB particles and the rare earth refiner as grain refiners, and achieves the problem of not influencing the effect of grain refinement and not conflicting with other alloy elements by refining and stabilizing the grains and then adding alloy strengthening alloy.

In the invention, the TI-B refiner is preferably kept at the constant temperature for 0.5 to 1 hour after being added.

In the invention, the refining degassing process is preferably to perform online purification, degassing and deslagging in a degassing device so as to remove stress, improve the quality of the melt and facilitate the production of qualified cast-rolled materials.

In the present invention, the refining degassing preferably further comprises impurity removal and filtration by using a secondary filtration device.

In the invention, the casting and rolling are preferably carried out on a rotary belt casting machine, and the aluminum liquid after impurity removal and filtration is cast and rolled into an aluminum coil blank by a casting roller which continuously rotates. The present invention is not particularly limited to the above-described rotary belt casting machine, and a rotary belt casting machine composed of a casting wheel and a steel belt, which is well known in the art, may be used.

After the aluminum coil blank is obtained, the aluminum coil blank is sequentially subjected to primary hot casting rolling, cooling, secondary cold rolling and punching to obtain an aluminum block blank.

In the invention, the thickness after the primary hot casting rolling is preferably reduced by 30-80%, and the thickness after the secondary cold rolling is preferably reduced by 20-60%. In the embodiment of the invention, the reduction amount of each thickness is preferably 3-15 mm.

In the present invention, the cooling is preferably performed by cooling at 500 ℃ for 0.5 to 2 hours and cooling at 300 ℃ for 0.5 to 2 hours in sequence.

In the present invention, the width of the cold rolled material obtained by the secondary cold rolling is preferably 0.3 to 1.5 m.

In the invention, the punching is preferably to punch the aluminum block by using a punching machine with the tonnage of 100 tons or more.

In the invention, an oil product is preferably selected to protect the punched surface of the aluminum block in the punching process, the oil product is preferably MOBILSHCCIBUS68 lubricating oil, and 5-10 g/50-100 g of workpiece is sprayed each time. In the invention, the cold-rolled material directly enters the subsequent punching process, and has the advantages of no cutting process, high efficiency and less consumption.

After the aluminum block blank is obtained, the aluminum block blank is sequentially subjected to annealing and first time effect treatment to obtain a first time effect product.

In the invention, the annealing and the first time effect treatment are independently preferably carried out at the temperature of 300-500 ℃, more preferably at the temperature of 400-500 ℃, and the time is independently preferably carried out for 2-20 hours, more preferably for 10-15 hours.

After the first time effect treatment is finished, the first time effect treatment product is preferably naturally cooled and stored for 2-8 hours.

In the present invention, it is preferred to keep the furnace headspace filled with inert gas continuously during the annealing process to prevent the problem of excessive oxidation. During the annealing, the aluminum block is softened and the oil remaining during the punching is removed.

After the first time-effect product is obtained, the surface treatment and the second time-effect treatment are carried out on the first time-effect product to obtain the aluminum material.

In the invention, the surface treatment is preferably an aluminum alloy surface granulation treatment process, more preferably, the obtained material after the first time effect treatment is passed through a dense spraying tunnel to obtain a dense annular gravure aluminum block with a uniform corrugated surface, aluminum alloy particles with high surface strength are sprayed in the tunnel, and the particle size of the aluminum alloy particles is preferably 0.3-1 mm. In the invention, the high-surface-strength aluminum alloy particles are preferably 3003 aluminum alloy particles with the hardness of 24-30 HB.

In the invention, the dense annular gravure aluminum block is easy to perform surface lubrication treatment, and the surface quality of the subsequent stretching forming is better.

In the invention, the air pressure of the intensive spraying is preferably 2-10 bar, and the density of the intensive spraying is preferably 10-20 dot matrix/mm²。

In the invention, the temperature of the second aging treatment is preferably 80-200 ℃, and the time is preferably 0.5-2 h.

In the invention, the second aging treatment can reduce the difference of the aluminum bottle structure.

After the second aging product is obtained, the invention preferably mixes the obtained second aging product, the polyhydric alcohol and the fatty acid surface treating agent, then carries out surface additive treatment to obtain the transition layer, and then removes the transition layer to obtain the aluminum bottle. In the invention, the transition layer can increase the surface lubricating effect of the aluminum bottle, and the surface lubricating effect is realized during subsequent use, so that the forming and processing efficiency is improved.

In the present invention, the polyhydric alcohol is preferably ethanol or ethylene glycol, and the fatty acid-based surface treatment agent is preferably sodium stearate, stearamide or N, N' -ethylene bisstearamide.

In the invention, the mass ratio of the second aging product, the polyhydric alcohol and the fatty acid surface treatment agent is preferably 300-400: 0.3-1.0: 0.03-0.5.

In the invention, the surface additive processing is preferably carried out under the condition of surface rolling, the rotating speed of the surface rolling is preferably 10-80 rpm, the time is preferably 10-30 minutes, the surface additive processing can promote the surface of the aluminum bottle to generate a transition layer, the surface lubrication effect of the subsequent processing of the aluminum bottle is realized, and the forming processing efficiency is improved.

After the aluminum material is obtained, the aluminum material is subjected to punch forming to obtain the bowl-shaped aluminum block.

In the invention, the outer diameter of the bowl-shaped aluminum block is preferably 34-80 mm, the depth is preferably 0.5-2 mm, the diameter of the inner concave surface is preferably 10-66 mm, and the angle between the inner concave surface and the horizontal plane is preferably 1-12 degrees. In the invention, the corner part of the bowl-shaped aluminum block is a right angle, so that the bowl-shaped aluminum block has relatively few sharp corner abrasion conditions, less aluminum scraps, capability of keeping a mold clean for a long time, and has an arch structure, good lubrication, contribution to aluminum material flowing during extrusion, stretching and forming and good appearance of a formed part.

The present invention is not particularly limited to the specific operation of the press molding, and may be performed in a manner known to those skilled in the art.

After the bowl-shaped aluminum block is obtained, the bowl-shaped aluminum block is sequentially subjected to sheet arrangement, extrusion and surface treatment to obtain the tank body with the surface passivation layer.

In the invention, the bowl-shaped aluminum blocks are preferably arranged with the concave surfaces consistent, and more preferably are arranged with the concave surface wafer selecting machine consistently. In the invention, the speed of the concave surface wafer sorting machine is preferably 200-500 pc/min.

In the invention, the bowl-shaped aluminum block is extruded into a barrel shape by a stable and strong extrusion force action by using an integrated extruder, and the obtained barrel-shaped structure has uniform and smooth processing deformation positions, no wrinkles, no scratches and no cracks. In the invention, the minimum extrusion height is preferably 130-240 mm; the thickness of the bottom of the tank of the barrel-shaped structure is preferably 0.35-0.65 mm, and the wall thickness of the barrel-shaped structure is preferably 0.2-0.35 mm.

After the extrusion is finished, the invention preferably also comprises the step of trimming the tubbiness aluminum can body according to the designed can body length, and the opening part of the trimmed aluminum can is preferably free of wrinkles and gaps.

In the present invention, the surface treatment preferably includes a first surface treatment and a second surface treatment which are sequentially performed, and the first surface treatment preferably includes the steps of: brushing and grinding reticulate pattern-shaped stripes on the outer surface of the barrel-shaped aluminum can body, and removing uneven bulges and irregular stripes on the surface of the extruded aluminum material to enable the surface to be flat and smooth so as to be beneficial to printing and further forming; the second surface treatment preferably comprises the steps of: and cleaning the obtained first surface treatment product with cleaning solution, and drying. In the invention, the cleaning solution preferably comprises sodium salt, potassium salt, zirconium salt and a surfactant, the cleaning temperature is preferably 50-100 ℃, more preferably 60-70 ℃, and the cleaning time is preferably 1-5 minutes, and the cleaning can form a surface passivation layer P2 on the surface of the bottom layer of the aluminum plate substrate, so that the printing and coating performance and the processing performance are further improved. The invention has no special limitation on the specific drying parameters, and can completely remove the cleaning solution. In the invention, the mass ratio of the sodium salt, the potassium salt, the zirconium salt and the surfactant is 3:3:2: 3.

After the can body with the surface passivation layer is obtained, the inner surface of the can body with the surface passivation layer is sprayed to form an inner coating.

In the invention, the coating used for forming the inner coating is preferably epoxy-polyester resin coating, the spraying is preferably carried out for 1-3 times, the coating layer on the wall of the can is uniform from the bottom to the body, and the inner coating can enable the aluminum bottle to have good content corrosion resistance effect.

After the spraying is finished, the paint is preferably dried and cured in a drying oven, the specific parameters of the drying and curing are not specially limited, the paint adhesion test of the inner coating can reach level I, and the compactness test of the inner coating is less than or equal to 5 mA.

After the tank body with the surface passivation layer is obtained, the surface passivation layer, the amino primer layer, the printing pigment layer, the surface paint protective layer and the wear-resistant layer are sequentially formed on the outer surface of the formed surface passivation layer, and the treated tank body is obtained.

In the invention, the amino primer layer is preferably obtained by spraying an amino primer, and the viscosity of the amino primer is preferably 70-120 s (25 ℃).

In the invention, after the coating is finished, the method preferably further comprises drying, wherein the drying temperature is preferably 100-200 ℃, and the drying time is preferably 5-15 minutes.

In the invention, the printing pigment layer is preferably formed by synchronous printing by a multicolor printing machine, the overprinting precision of the synchronous printing by the multicolor printing machine is preferably 0.02mm, the printing pigment layer is preferably dried after being formed, the drying temperature is preferably 100-200 ℃, and the time is preferably 5-15 minutes.

After the printing pigment layer is formed, the invention preferably further comprises the step of coating gloss oil on the printing pigment layer, wherein the gloss oil can ensure that the necking deformation process does not damage the printing pigment layer and enhance the visual gloss effect. In the invention, the viscosity of the gloss oil is preferably 70-120 s (25 ℃), and after the coating is finished, the coating also preferably comprises drying, wherein the drying temperature is preferably 100-200 ℃, and the drying time is preferably 5-15 minutes.

In the present invention, the top coat protective layer is preferably obtained by applying a top coat protective coating, and the top coat protective coating preferably comprises an improved polyester material and polytetrafluoroethylene.

In the invention, the mass content of the polytetrafluoroethylene in the surface paint protective coating is preferably 0.2-0.4%.

In the present invention, the step of forming the wear-resistant layer is preferably to sequentially perform heat curing and aging treatment on the top coat protective layer, so as to form the wear-resistant layer on the surface of the top coat protective layer.

In the invention, the heating curing temperature is preferably 150-200 ℃, and the time is preferably 5-15 minutes after curing; the temperature of the aging treatment is preferably 50 ℃, and the time is preferably 1-2 hours.

After the treated can body is obtained, the invention necks down the treated can body to obtain the aluminum bottle.

In the present invention, the necking is preferably performed in 40 passes, and the amount of necking in each pass is preferably 1 to 5 mm.

In the invention, the necking is preferably carried out by adopting a rolling and pressing integrated construction process, and the necking is preferably carried out according to different forming angles to form a formed tank with necking and rolling shapes on the tank body, so that the processing deformation position of the necking tank body is uniform and smooth, and the necking tank body is wrinkle-free, scratch-free, crack-free and pit-free.

In the present invention, the neck per batch can weight deviation value is preferably ± 2 g; the outer diameter of the bottle mouth after necking is preferably 26.6 +/-0.2 mm, the inner diameter of the bottle mouth is preferably 20.5 +/-0.2 mm, the height of a curled edge is preferably 3.85 +/-0.2 mm, and the deviation of the height of the can is preferably H +/-0.5 mm, wherein H is the height of the can.

After necking is completed, the method preferably further comprises leak detection, wherein the leak detection is preferably automatically detected after being filled with air pressure, so that micropores with the size of 0.1mm are found in a highlight detector.

After the leak detection is finished, the method preferably further comprises drying, and preferably, the obtained aluminum can is washed by pure water in a post-washing machine and dried at high temperature in a 10 ten thousand-level purification workshop.

After the drying is finished, the whole tray is preferably recycled to a clean room after the inner packaging is finished, the outer tray is replaced and packaged, the outer part of the whole aluminum can tray is packaged and fixed by using the winding film, and the mark is made to obtain the aluminum bottle.

After the aluminum bottle is obtained, the method preferably further comprises finished product inspection, more preferably, the inspection is strictly carried out according to the product standard requirements, and the inspection preferably comprises finished product paint film adhesion detection, outer coating hardness detection, inner coating compactness detection, pressure resistance detection, inner and outer coating chemical stability detection and microorganism detection.

In order to further illustrate the present invention, the following detailed description of the aluminum bottle and the method for manufacturing the same will be given with reference to examples, but they should not be construed as limiting the scope of the present invention.

Example 1

The aluminum bottle comprises an inner coating (5 mu m), an aluminum plate substrate layer (0.2mm), a surface passivation layer (5 mu m), an amino primer layer (5 mu m), a printing pigment layer (2 mu m), a surface paint protective layer (5 mu m) and an abrasion-resistant layer (5 mu m) which are sequentially stacked.

The aluminum base layer of the aluminum bottle of the embodiment comprises the following elements in percentage by mass: 0.1% of Si, 0.25% of Fe0, 0.01% of Cu0, 0.3% of Mn0.03%, 0.02% of Zn0.02%, 0.02% of Ti0.03%, 0.01% of Ni0.01%, 0.01% of Sr0, Zr0.01%, 0.01% of B and the balance of Al.

The preparation method comprises the following steps:

preparing materials: 1090 standard aluminum ingots and 10 wt% 3003 recycled aluminum bottles are used in the batching process, mixing configuration is carried out, uniform slitting and mixing processing is carried out, after a blast furnace is hoisted by taking 3T as a unit, dispersing processing is carried out, the smelting furnace is started to reach 600 ℃ for smelting, and after the molten state is 0.5H, high-pressure gas columns are disturbed and stirred for 15 minutes, so that molten aluminum is obtained. The gas column is inert gas, Fe agent, Si agent, Cu agent, Mn agent, Mg agent, Zn agent, Ti agent, Ni agent, Zr agent and Sr agent are added, then primary slag skimming (air column stirring) is carried out, then sampling analysis and secondary adjustment are carried out, after refined grains in a refining furnace are added, air column stirring is carried out, and special TI-B refining agent is added for refining (the TI-B refining agent comprises TiB particles and rare earth refining agent, the dosage of the TI-B refining agent is 0.08 wt% of molten aluminum, the TiB particles are contained by 0.05 wt%, and the rare earth refining agent is contained by 0.03 wt%). Then the aluminum liquid in the standing furnace enters a degassing device through a backflow pipeline for on-line purification, degassing and deslagging, and stress relief operation, after impurity removal and filtration are carried out by using a secondary filtration device, the aluminum liquid is cast and rolled into an aluminum coil blank through a casting roller which continuously rotates on a rotating belt casting machine, then the aluminum coil blank is guided from the casting machine to a hot rolling machine, the thickness is reduced by 30% after hot rolling, and then the aluminum coil blank enters a cold rolling machine through a roller rail, and the thickness is reduced by 20% after cold rolling. Finally forming a 0.6m wide aluminum plate; the rolled aluminum plate is propagated to a punching line, an aluminum block is punched by using a punching machine of 100 tons (oil (model number MOBILHCCIBUS 68 lubricating oil is used in the punching process, 5g/50 of workpiece is coated every time), then annealing is carried out in an annealing furnace (500 ℃) for 2 hours, the top space of the annealing furnace is continuously kept full of inert gas in the annealing process, after annealing, 400 ℃ is adopted for keeping for 2 hours for first time effect treatment, then the first time effect product is naturally cooled and stored for 2 hours, and then dense spraying is carried outThe aluminum alloy particles with extremely high surface strength (3003 aluminum alloy particles with the hardness of 24-30 HB are used, the particle size is 0.3-1 mm, the air pressure of intensive spraying is 2bar, and the density of the intensive spraying is 10 dot matrixes/mm²) Keeping the temperature of 80 ℃ for 2 hours for second aging treatment, putting the obtained product into a rotary surface treating machine, adding polyol (ethanol) and a fatty acid surface treating agent (sodium stearate), performing surface rolling treatment at 10rpm for 10 minutes, and finally performing vibration treatment on a finished aluminum block by using a fine stainless steel sieve to screen out impurities, and fixing and encasing to obtain the aluminum material;

the bowl-shaped aluminum block is characterized in that an aluminum material is punched, a special punching die is added on the basis of ordinary punching, the manufactured bowl-shaped aluminum block with a non-planar structure is provided, the outer diameter of the bowl-shaped aluminum block is 34mm, the depth of the bowl-shaped aluminum block is 0.5mm, the diameter of an inner concave surface of the bowl-shaped aluminum block is 10mm, the angle between the inner concave surface and a horizontal plane is 1 degree, the bowl-shaped aluminum block obtained in the embodiment has no oil stain, dust, air holes and slag inclusion on the appearance, no pull mark or tearing condition on the surface, no sharp burr or pit exceeding 0.2mm, and no obvious texture direction;

carrying out concave consistent arrangement on the bowl-shaped aluminum blocks, and carrying out consistent arrangement through a concave surface chip selecting machine, wherein the chip selecting speed is set to be 200 pc/min;

then, extruding the bowl-shaped aluminum blocks after the sheets are arranged into a barrel shape by using an integrated extruder, wherein the processing deformation position of the tank body is uniform and smooth, and has no wrinkle, scratch or crack, the minimum extrusion height is 130mm, the thickness of the bottom of the tank is 0.35mm, and the thickness of the wall of the tank is 0.2 mm;

trimming the barrel-shaped aluminum can body according to the designed can body length, wherein the trimmed aluminum can opening has no crease or gap;

first surface treatment: the outer surface of the barrel body is brushed and ground by reticulate pattern-shaped stripes, uneven bulges and irregular stripes on the surface of the extruded aluminum material are removed, and the surface becomes flat and smooth, so that printing and further forming are facilitated;

and (3) second surface treatment: cleaning by mixing a cleaning solution containing sodium salt, sylvite, zirconium salt and a surfactant (in a mass ratio of 3:3:2:2), and cleaning at 60 ℃ for 1 minute to clean the tank body, so that the tank body is convenient to further print and process; then the barrel body is put into a baking oven to be dried for 10 minutes at the temperature of 100 ℃.

Coating of an inner coating: carrying out internal spraying by using unsaturated epoxy-polyester resin paint; each can body is sprayed for 3 times by the spraying system, and the coating layers on the can walls are uniform and consistent from the bottom to the body;

drying: the paint on the inner spraying is dried and cured at 200 ℃ for 10 minutes by a drying furnace, and the result of a film adhesion test of a product dried and cured on the inner coating is as follows: i, grade; and (3) testing the compactness of the inner coating: less than or equal to 5 mA.

Preparing an amino primer layer: coating amino primer on the outer part of the tank wall, wherein the viscosity of the coating is 70s (25 ℃), and the drying temperature of the amino primer is 180 ℃, and drying is carried out for 10 minutes;

preparation of a printing pigment layer: the printing pigment layer is synchronously printed by adopting a multicolor printing machine, the image is clear, the overprinting precision is 0.02mm, and the printing pigment layer is matched with a high-precision imaging detection system, so that the appearance of the obtained printing pigment layer is free from foreign matter adhesion, and then the printing pigment layer is dried for 10 minutes at 180 ℃.

Glazing and drying: a layer of gloss oil is coated on the printing pigment layer, so that the printing ink layer is prevented from being damaged in the necking deformation process, and the visual gloss effect is enhanced; gloss oil viscosity is 70s (25 ℃), and then drying is carried out for 10 minutes at 180 ℃;

preparing a surface paint protective layer and a wear-resistant layer: coating a surface paint protective coating on the surface of the gloss oil, wherein the surface paint protective coating contains an improved polyester material and PTFE, the mass content of the PTFE in the surface paint protective coating is 0.2%, after the coating is finished, carrying out high-temperature curing at 200 ℃, for 10 minutes and at 50 ℃ for 1 hour for aging treatment to form a wear-resistant layer on the PTFE layer, and separating out the PTFE at the high-temperature curing stage to form a surface paint protective layer to form the wear-resistant layer;

necking: the cylindrical can body is subjected to a 40-station necking process, a rolling and pressing integrated construction process is adopted, the necking quantity in each process is controlled to be 5mm according to different forming angles, and the can body forms a forming can with the shapes of necking, rolling opening and the like; the processing deformation of the necking can body is uniform and smooth, and has no wrinkles, no scratches, no cracks and no pits; the weight deviation value of each batch of cans is +/-2 g; after necking down, the outer diameter of the bottle mouth is controlled to be 26.6 +/-0.2 mm, the inner diameter of the bottle mouth is controlled to be 20.5 +/-0.1 mm, the height of a turned edge is controlled to be 3.85 +/-0.2 mm, and the deviation of the height of the can is controlled to be H +/-0.5 mm;

and (3) leak detection: the formed tank body is automatically detected after being filled with air pressure, and even micropores with the size of 0.1mm can be found in a strong light detector;

drying: the aluminum can is washed by pure water in a post-washing machine in a 10 ten thousand grade purification workshop and dried for 10 minutes at the high temperature of 100 ℃;

outsourcing: after the inner package is finished, the whole aluminum can tray is transferred to a clean room to be packaged by replacing an outer tray, the outer part of the whole aluminum can tray is packaged and fixed by using a winding film, and identification is made;

and (4) inspecting a finished product: and strictly carrying out item-by-item inspection according to the standard requirements of products, and carrying out adhesion detection on a finished paint film, hardness detection on an external coating, compactness detection on an internal coating, pressure resistance detection, chemical stability test on the internal coating and the external coating and microorganism detection to obtain the aluminum bottle, wherein the specification of the aluminum bottle is the same as that of a commercially available 12floz aluminum bottle.

Fig. 1 is a micro-topography of the aluminum substrate layer prepared in example 1, and it can be seen from fig. 1 that the aluminum substrate layer has a uniform internal structure and refined grains.

Example 2

The aluminum substrate of the present embodiment is the same as embodiment 1, except that the aluminum substrate of the present embodiment includes the following elements by mass percent: 0.1% of Si, 0.3% of Fe0, 0.05% of Cu0, 0.03% of Mn0, 0.03% of Mg0, 0.05% of Zn0.05%, 0.05% of Ti0.03%, 0.03% of Ni0, 0.05% of Sr0, 0.05% of ZrB, 0.05% of B and the balance of Al.

Example 3

The only difference was that a D66mm aluminum can was made, as in example 1.

Comparative example 1 a commercial 1070 aluminum bottle of 12 floz.

The 1070A aluminum bottle comprises the following elements in percentage by mass: 0.2% of Si, 0.25% of Fe0, 0.03% of Cu0.03%, 0.03% of Mn0.03%, 0.03% of Mg0, 0.07% of Zn0.03% of Ti0.03% and the balance of Al.

Comparative example 2 commercial D66mm aluminum bottle

The performance of the aluminum bottles of examples 1 to 2 and comparative example 1 was measured, and the results were as follows: the aluminum bottles of examples 1 to 2 and comparative example were 32, 35 and 45g in weight, respectively, the aluminum bottles of examples 1 to 2 and comparative example 1 were 5.6, 4.8 and 4KN in bearing strength, respectively, and the empty can was 1.7, 1.3 and 0.9MPa in internal pressure resistance, respectively.

The results of comparing the properties of the aluminum bottles of example 3 and comparative example 2 are shown in table 1, and it is understood from table 1 that the aluminum bottles produced by the present invention are light in weight and excellent in pressure resistance and breakage resistance.

TABLE 1 aluminum bottle performance data for example 3 and comparative example 2

	Comparative example 2	Example 3
			Specification of	D66×150	D66×150
Weight of the pot	62g	55g
			Pressure resistance	1.9Mpa	1.93Mpa
Burst resistance	2.15Mpa	2.21Mpa

The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be construed as the protection scope of the present invention.