CN102528401B - Food tin can production process - Google Patents
Food tin can production process Download PDFInfo
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- CN102528401B CN102528401B CN201210044534.5A CN201210044534A CN102528401B CN 102528401 B CN102528401 B CN 102528401B CN 201210044534 A CN201210044534 A CN 201210044534A CN 102528401 B CN102528401 B CN 102528401B
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- tinned food
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Abstract
The invention discloses a food tin can production process which comprises the following steps of: treating a 5052 aluminum alloy strip through five passes rolling (2.3 mm, 1.3 mm, 0.8 mm, 0.5 mm, 0.30 mm and 0.22 mm) to form a first prefabricated part; annealing the first prefabricated part to form a second prefabricated part; drawing and correcting the second prefabricated part to form a third prefabricated part; coating the third prefabricated part to form a fourth prefabricated part, cutting the fourth prefabricated part and waxing to obtain a fifth prefabricated part; and molding the fifth prefabricated part to form a finished product of a food tin can. Accordingly, the food tin can production process disclosed by the invention can effectively improve the production quality of food tin cans.
Description
Technical field
The present invention relates to food package box manufacturing technology field, particularly a kind of Tinned food container production technology.
Background technology
Tinned food container, as the fresh product of a kind of long-life food prod, has obtained being widely used of people.
At present, the Tinned food container product main exit of China is to Europe, and European countries are very high for the quality requirement of Tinned food container product, first, the deep drawability of Tinned food container product is had to certain requirement, and the deep-draw of Tinned food container product is highly 15-20mm; Secondly, very high to the film performance requirement of Tinned food container, as: resistance to water: 121/60min; Acid resistance: 3% acetic acid 121/30min; Resistance to sulphur: cysteine salt and phosphate mixed solution 121/60min, without bubbling, without turning white, without the requirement such as coming off,
But because the existing cold-rolling process of Tinned food container of China adopts the directly mode of rolling to produce, cold rolling process does not carry out annealing in process, so this technique exists following shortcoming:
1, finished product strip-rolling lines is obvious, causes in four edges and corners punching of Tinned food container and forms netting twine.Because this technique is not carried out intermediate annealing processing, strap cold rolling roll-force is larger, the lubricated unstable surface rolling strip flaw that easily causes in rolling, during tin can punching edges and corners distortion less, striped cannot be eliminated and form netting twine defect.
2, in Tinned food container punching process, easily there is avulsion phenomenon.Because this technique is not carried out finished products processing, band intensity is high, percentage elongation is low, and plasticity is poor, the unstable avulsion defect that causes of punching quality.
3, film de-acid resistance, resistance to sulphur of four corner angle of Tinned food container is defective.Owing to forming netting twine in four edges and corners punching of Tinned food container, film by drawing crack, under acidproof, resistance to sulfur test, react with base material, causing filming comes off.
4, in punching, film and come off.Because band need carry out punching deformation process, easily there is obscission in band coating under unlubricated condition.
5, contain bisphenol-A composition in filming, do not meet food hygiene requirement.Existing packaging for foodstuff coating adopts epoxy coating, and epoxy resin is synthetic with bisphenol-A, theoretically due to the imperfection of chemical reaction, causes containing all the time in coating micro-bisphenol-A.
Therefore there are serious quality problems in the quality of production of the tin can of China.
So how the quality of production of raising Tinned food container is provided is the important technological problems that those skilled in the art need to solve at present.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of Tinned food container production technology, it can effectively improve the quality of production of Tinned food container.
For solving the problems of the technologies described above, the invention provides following technical scheme:
A kind of Tinned food container production technology provided by the invention, comprises step:
Rolling, by 2.3-1.3-0.8-0.5-0.30-0.22mm five passage roll-in sheet materials, forms the first prefabrication by 5052 aluminium alloy strips;
Annealing, carries out annealing in process to described the first prefabrication, forms the second prefabrication;
Straightening, carries out straightening processing to described the second prefabrication, forms the 3rd prefabrication;
Coating, carries out coating to described the 3rd prefabrication, forms the 4th prefabrication;
Cut waxing, described the 4th prefabrication is cut, and the processing of waxing, the 5th prefabrication formed;
Moulding, by described the 5th prefabrication moulding, forms Tinned food container finished product.
Preferably, in described rolling step, adopting roughness is that the roll of 0.15-0.22 μ m carries out the 4th and the rolling of the 5th passage, and rolling speed is less than 500m/min.
Preferably, in the annealing of described step, described the first prefabrication is placed on to lower 3 hours of the environment that temperature is 210 degree.
Preferably, in described step coating, select polyester coating to carry out coating to described the 3rd prefabrication.
Preferably, in described step coating, the working viscosity of the inner side coating of described the 3rd prefabrication is 65-68 second, and the working viscosity of outside coating is 30-35 second.
Preferably, in described step coating, the heavy 11-13g/m of the inner side coating of described the 4th prefabrication of formation
2, the heavy 5-7g/m of outside coating
2.
Preferably, described step cut be coated with cured in, the interior outside waxing amount of described the 4th prefabrication is 90-140mg/m
2.
Preferably, after described step moulding, also comprise step:
Packing, packs described Tinned food container finished product.
A kind of Tinned food container production technology provided by the invention, comprises step: rolling, by 2.3-1.3-0.8-0.5-0.30-0.22mm five passage roll-in sheet materials, forms the first prefabrication by 5052 aluminium alloy strips; Annealing, carries out annealing in process to described the first prefabrication, forms the second prefabrication; Straightening, carries out straightening processing to described the second prefabrication, forms the 3rd prefabrication; Coating, carries out coating to described the 3rd prefabrication, forms the 4th prefabrication; Cut waxing, described the 4th prefabrication is cut, and the processing of waxing, the 5th prefabrication formed; Moulding, by described the 5th prefabrication moulding, forms Tinned food container finished product.
It should be noted that, because Mg content in 5052 alloys is between 2.2%-2.8%, it is high that the alloy foil of its production possesses tensile strength simultaneously, good percentage elongation, and good thermal conduction advantage, has incomparable advantage in making containers for food use industry compared with other material.Therefore, the raw material of Tinned food container of the present invention adopts 5052 aluminium alloy strips that thickness is 2.3mm, the present invention adopts five passage rolling technology to carry out rolling to band, so that band reaches instructions for use, reach the thickness of 0.22mm, and adopt five passage rollings can solve the streaky defect of strip-rolling surface tool of Tinned food container; The first prefabrication is carried out to annealing process processing, can effectively reduce the strength of materials, improve the percentage elongation of material simultaneously, guarantee punching requirement.In addition, Tinned food container production technology provided by the invention, following adopted is coated with ceroplastic, and the surface lubrication that can effectively improve tin can band, effectively ensures that obscission does not appear in band coating in punching process.
Therefore, Tinned food container production technology provided by the invention, it can effectively improve the quality of production of Tinned food container.
Accompanying drawing explanation
Fig. 1 is Tinned food container production technological process in the specific embodiment of the invention.
The specific embodiment
Core of the present invention is to provide a kind of Tinned food container production technology that can improve canned food quality.
In order to make those skilled in the art person understand better the present invention program, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 1, Fig. 1 is Tinned food container production technological process in the specific embodiment of the invention.
This concrete a kind of Tinned food container production technology, comprises step:
Rolling, by 2.3-1.3-0.8-0.5-0.30-0.22mm five passage roll-in sheet materials, forms the first prefabrication;
Annealing, carries out annealing in process to described the first prefabrication, forms the second prefabrication;
Straightening, carries out straightening processing to described the second prefabrication, forms the 3rd prefabrication;
Coating, carries out coating to described the 3rd prefabrication, forms the 4th prefabrication;
Cut waxing, described the 4th prefabrication is cut, and the processing of waxing, the 5th prefabrication formed;
Moulding, by described the 5th prefabrication moulding, forms Tinned food container finished product.
It should be noted that, because Mg content in 5052 alloys is between 2.2%-2.8%, it is high that the alloy foil of its production possesses tensile strength simultaneously, good percentage elongation, and good thermal conduction advantage, has incomparable advantage in making containers for food use industry compared with other material.Therefore, the raw material of Tinned food container of the present invention adopts 5052 aluminium alloy strips that thickness is 2.3mm, the present invention adopts five passage rolling technology to carry out rolling to band, so that band reaches instructions for use, reach the thickness of 0.22mm, and adopt five passage rollings can solve the streaky defect of strip-rolling surface tool of Tinned food container; The first prefabrication is carried out to annealing process processing, can effectively reduce the strength of materials, improve the percentage elongation of material simultaneously, guarantee punching requirement.In addition, Tinned food container production technology provided in the present embodiment, following adopted is coated with ceroplastic, and the surface lubrication that can effectively improve tin can band, effectively ensures that obscission does not appear in band coating in punching process.
Therefore, Tinned food container production technology provided in the present embodiment, it can effectively improve the quality of production of Tinned food container.
In the preferred version of this specific embodiment, in step rolling, adopting roughness is that the roll of 0.15-0.22 μ m carries out the 4th and the rolling of the 5th passage, and rolling speed is less than 500m/min.
So, adopt roll that roughness is less to carry out the 4th and the rolling of the 5th passage to band, and carry out roll speed limit, can further evade the defect that striped appears in strip surface.
In addition, in another preferred version of this specific embodiment, in step annealing, the first prefabrication is placed on to lower 3 hours of the environment that temperature is 210 degree.
According to the instructions for use of material and 5052 alloy aluminum annealing process and mechanical curves, selected following 3 kinds of Annealing Schemes carry out port annealing test, and 180 ℃/3hrs, 210 ℃/3hrs, 230 ℃/3hrs, concrete outcome sees the following form:
| 5052H24 | Tensile strength Mpa | Yield strength Mpa | Percentage elongation % |
| 180℃/3hrs | 300-300 | 280-280 | 5.5-6.0 |
| 210℃/3hrs | 280-285 | 245-250 | 9.0-9.0 |
| 230℃/3hrs | 255-260 | 220-225 | 11.0-12.0 |
Because this kind finished product mechanical property requirements is strict:
| Tensile strength Mpa | Yield strength Mpa | Percentage elongation % |
| 265-285 | 240-255 | ≥8％ |
Therefore,, when annealing process is 210 ℃/3hrs, the mechanical property of band is best.
It should be noted that, in prior art, the coating of Tinned food container contains bisphenol-A composition, does not meet food hygiene requirement.
Given this, the coating that this specific embodiment adopts is polyester coating, and it does not contain bisphenol-A composition, so it can reach the requirement of food safety and sanitation.
In addition, in this specific embodiment, the working viscosity of the inner side coating of the 3rd prefabrication is 65-68 second, and the working viscosity of outside coating is 30-35 second.So, can guarantee the caking ability of coating and the 3rd prefabrication.
The 3rd prefabrication carries out the heavy 11-13g/m of inner side coating of the 4th prefabrication that forms after coating
2, the heavy 5-7g/m of outside coating
2.So, can guarantee that the inside and outside both sides of the 4th prefabrication have more suitable coating layer thickness.
In addition, in this specific embodiment, step cut be coated with cured in, the interior outside waxing amount of the 4th prefabrication is 90-140mg/m
2.
So, can effectively guarantee that band there will not be the problem coming off in punching process.
The Tinned food container production technology that this specific embodiment provides also can comprise step packing after step moulding, and Tinned food container finished product is packed, and so, has formed the final products of Tinned food container.
Applied specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (7)
1. a Tinned food container production technology, is characterized in that, comprises step:
Rolling, 5052 aluminium alloy strips are passed through to 2.3-1.3-0.8-0.5-0.30-0.22mm five passage roll-in sheet materials, adopting roughness is that the roll of 0.15-0.22 μ m carries out the 4th and the rolling of the 5th passage, and rolling speed is less than 500m/min, forms the first prefabrication;
Annealing, carries out annealing in process to described the first prefabrication, forms the second prefabrication;
Straightening, carries out straightening processing to described the second prefabrication, forms the 3rd prefabrication;
Coating, carries out coating to described the 3rd prefabrication, forms the 4th prefabrication;
Cut waxing, described the 4th prefabrication is cut, and the processing of waxing, the 5th prefabrication formed;
Moulding, by described the 5th prefabrication moulding, forms Tinned food container finished product.
2. Tinned food container production technology according to claim 1, is characterized in that, in the annealing of described step, described the first prefabrication is placed on to lower 3 hours of the environment that temperature is 210 degree.
3. Tinned food container production technology according to claim 2, is characterized in that, in described step coating, selects polyester coating to carry out coating to described the 3rd prefabrication.
4. Tinned food container production technology according to claim 3, is characterized in that, in described step coating, the working viscosity of the inner side coating of described the 3rd prefabrication is 65-68 second, and the working viscosity of outside coating is 30-35 second.
5. Tinned food container production technology according to claim 4, is characterized in that, in described step coating, and the heavy 11-13g/m2 of the inner side coating of described the 4th prefabrication of formation, the heavy 5-7g/m2 of outside coating.
6. Tinned food container production technology according to claim 5, is characterized in that, described step cut be coated with cured in, the interior outside waxing amount of described the 4th prefabrication is 90-140mg/m2.
7. according to the Tinned food container production technology described in claim 1-6 any one, it is characterized in that, after described step moulding, also comprise step:
Packing, packs described Tinned food container finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210044534.5A CN102528401B (en) | 2012-02-24 | 2012-02-24 | Food tin can production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210044534.5A CN102528401B (en) | 2012-02-24 | 2012-02-24 | Food tin can production process |
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| Publication Number | Publication Date |
|---|---|
| CN102528401A CN102528401A (en) | 2012-07-04 |
| CN102528401B true CN102528401B (en) | 2014-08-20 |
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| CN201210044534.5A Active CN102528401B (en) | 2012-02-24 | 2012-02-24 | Food tin can production process |
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| CN107433426A (en) * | 2016-05-26 | 2017-12-05 | 沃维克自动化公司 | Method for manufacturing the bush type supporting member sleeve to crack |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032194A (en) * | 1987-06-24 | 1989-04-05 | 塞格杜尔·皮奇尼铝加工公司 | Be suitable for making the aluminium alloy containing magnesium sheet material of can body and the method for producing this sheet material with punching press and stretching method |
| US6231970B1 (en) * | 2000-01-11 | 2001-05-15 | E. Khashoggi Industries, Llc | Thermoplastic starch compositions incorporating a particulate filler component |
| CN1708532A (en) * | 2002-10-24 | 2005-12-14 | 纳幕尔杜邦公司 | Sulfonated aliphatic-aromatic polyetherester films, coatings, and laminates |
| CN101397622A (en) * | 2008-06-26 | 2009-04-01 | 江苏常铝铝业股份有限公司 | Aluminium alloy foil material for container and method for producing the same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6789602B2 (en) * | 2002-02-11 | 2004-09-14 | Commonwealth Industries, Inc. | Process for producing aluminum sheet product having controlled recrystallization |
| US7503986B2 (en) * | 2003-01-21 | 2009-03-17 | Alcoa, Inc. | Method for shortening production time of heat treated aluminum alloys |
| US6787245B1 (en) * | 2003-06-11 | 2004-09-07 | E. I. Du Pont De Nemours And Company | Sulfonated aliphatic-aromatic copolyesters and shaped articles produced therefrom |
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2012
- 2012-02-24 CN CN201210044534.5A patent/CN102528401B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032194A (en) * | 1987-06-24 | 1989-04-05 | 塞格杜尔·皮奇尼铝加工公司 | Be suitable for making the aluminium alloy containing magnesium sheet material of can body and the method for producing this sheet material with punching press and stretching method |
| US6231970B1 (en) * | 2000-01-11 | 2001-05-15 | E. Khashoggi Industries, Llc | Thermoplastic starch compositions incorporating a particulate filler component |
| CN1708532A (en) * | 2002-10-24 | 2005-12-14 | 纳幕尔杜邦公司 | Sulfonated aliphatic-aromatic polyetherester films, coatings, and laminates |
| CN101397622A (en) * | 2008-06-26 | 2009-04-01 | 江苏常铝铝业股份有限公司 | Aluminium alloy foil material for container and method for producing the same |
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| CN102528401A (en) | 2012-07-04 |
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