JP2009012078A - Manufacturing method for can with cylindrical barrel portion - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method for a can with a cylindrical barrel portion capable of preventing any skeleton from being remained in a cupping device with excellent can formability without generating any black stripe in the barrel portion of the can, allowing a punch sleeve to be excellently drawn in a DI working step, and allowing punch damage to be hardly generated on the inner surface side of the can. <P>SOLUTION: In the can manufacturing method in which a can having a cylindrical barrel portion is manufactured by performing the drawing and the ironing a plate 50 after applying lubricants 40, 41 on one side and the other side of the plate-like aluminum alloy plate 50, the properties of the lubricants 40, 41 are different on one side and the other side of the plate 50. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a can having a cylindrical body.

In general, a can having a cylindrical body such as a bottle can is obtained by punching a circular plate from an aluminum alloy metal plate and drawing it to obtain a cylindrical cup member. It is manufactured by drawing and ironing to reduce the diameter of the can opening.
Here, in the step of punching the circular plate material from the metal plate material, the skeleton that is the metal plate material left after the circular plate material is punched is then discharged from the cupping device.
In the redrawing / ironing process, the cylindrical cup obtained by the cupping press which is the previous step is placed on the punch sleeve and the redrawing die, and the cup holder sleeve and the punch sleeve are advanced in this state. Accordingly, the cup holder sleeve presses the bottom surface of the cup against the end surface of the redraw die. Next, while the cup pressing operation is performed by the cup holder sleeve, the punch sleeve redraws the cup to form the cup into an elongated flat bottom can. And this flat bottom can passes through the ionizing die one after another and is gradually ironed, and the bottom of the can is formed by pressing the bottom of the can against the bottom mold. Furthermore, the diameter of the open end of the flat bottom can is reduced using a dynacker to produce a bottle can having a cylindrical portion.

In this process, when lubrication is insufficient during drawing or ironing, problems arise in the formability of the bottle can such as the occurrence of black streaky surface patterns called black streaks on the surface of the can body and the lack of body. Therefore, conventionally, a lubricant is applied to a metal plate by a ruble cater immediately before the drawing process, and there are mainly two application methods. One is a method in which a metal plate material is immersed in emulsified oil (emulsion) and then a required amount of lubricant is adhered by a squeeze roll, and the other is a method in which a stock solution of lubricant is adhered to the metal plate material by a roll or the like. It is.
And the manufacturing method of the bottle can which uses the metal plate material by which the lubricant was apply | coated to the following patent document 1 is proposed.
In patent document 1, it is a manufacturing method of the bottle can which performs drawing and ironing, after apply | coating the lubricant for draw forming to each surface of the metal plate of the aluminum alloy for bottle cans.
Japanese Patent Laid-Open No. 10-85872

However, in the bottle can manufacturing method described in Patent Document 1, lubricating oil having the same kinematic viscosity is applied to both surfaces of the metal plate material.
For this reason, when the kinematic viscosity of the applied lubricating oil is high, there is a problem that the skeleton sticks to the mold and that the punch sleeve can be easily removed from the flat bottom can.
That is, when the kinematic viscosity of the lubricant applied to the outer surface side of the cylindrical cup is high, the skeleton sticks to the mold after the step of punching the circular plate from the metal plate, and the skeleton is placed in the cupping device. Since it remained, there was a problem that production of the can was hindered.
Also, if the lubricant applied to the inner surface of the cylindrical cup has a high kinematic viscosity, when the air is injected into the flat bottom can and the punch sleeve is pulled out of the flat bottom can, the punch sleeve will not come off the flat bottom can well. Therefore, there is a problem that the can is blown, the can hits the bottom mold, etc., the can bottom side of the can is bent, and bottom deformation occurs.

On the other hand, when the kinematic viscosity of the lubricant applied to the surface of the metal plate material is low, there are problems that the moldability of the bottle can deteriorates and punch scratches.
That is, when the kinematic viscosity of the lubricant applied to the outer surface side of the cup or flat bottom can is low, black streaks are likely to occur in the can body during drawing or ironing, and bottle cans are easily cut. There was a problem with moldability.
Furthermore, if the kinematic viscosity of the lubricant applied to the inner surface side of the flat bottom can is low, the punch sleeve damages the inner surface side of the flat bottom can, and there is a problem that punch scratches occur on the inner surface of the flat bottom can.

In order to achieve the above object, the present invention proposes the following means.
According to the first aspect of the present invention, when a can having a cylindrical body is manufactured, a lubricant is applied to one surface and the other surface of a plate-like aluminum alloy, and then the plate material is drawn. And in the manufacturing method which manufactures the can provided with the said cylindrical trunk | drum by ironing, the property of the said lubricant differs in the one surface and the other surface of the said board | plate material, It is characterized by the above-mentioned.

According to the method for manufacturing a can having a cylindrical body according to the present invention, in the process of drawing and ironing, while the processing conditions on one surface and the other surface of the metal plate are different, A lubricant that matches the processing conditions of the surface is applied to each surface of the metal sheet.
The property in the present invention is a concept including static viscosity, kinematic viscosity and density.

  According to a second aspect of the present invention, there is provided a method for manufacturing a can having the cylindrical body portion according to the first aspect, wherein the lubricant applied to the outer surface of the plate is on the outer surface side of the plate. The kinematic viscosity is higher than the kinematic viscosity of the lubricant applied to the inner surface of the plate material.

  According to the method for manufacturing a can having a cylindrical body according to the present invention, it is necessary to ensure the pull-out property and suppress the occurrence of punch scratches on the surface of the plate material which is the inner surface side of the can. In order to ensure the moldability of the can and prevent the skeleton from remaining in the cupping press, the surface on the outer surface side of the can is the surface on the inner surface side. Therefore, a lubricant having a higher kinematic viscosity is applied.

According to a third aspect of the present invention, there is provided a method for manufacturing a can having the cylindrical body according to the second aspect, wherein the lubricant is applied to a surface of the plate material on the inner surface side of the can. The viscosity is 6 × 10 ⁻⁶ m ² / s or more and less than 25 × 10 ⁻⁶ m ² / s, and the kinematic viscosity of the lubricant applied to the outer surface is 11 × 10 ⁻⁶ m ² / s or more. It is characterized by being less than 100 × 10 ⁻⁶ m ² / s.

According to the method of manufacturing a can having a cylindrical body according to the present invention, the can has excellent moldability on the surface of the metal plate material on the outer surface side of the can, and the skeleton is discharged well from the cupping device. A lubricant with high kinematic viscosity is applied.
Also, a lubricant having a low kinematic viscosity that is excellent in can pull-out and hardly causes punch scratches is applied to the surface of the aluminum alloy sheet that is the inner surface side of the can.
That is, when the kinematic viscosity of the lubricant applied to the surface of the aluminum alloy plate material on the inner surface side of the can is lower than 6 × 10 ⁻⁶ m ² / s, punch scratches are likely to occur on the inner surface of the can. This is because, when the kinematic viscosity is 25 × 10 ⁻⁶ m ² / s or more, the removal property of the can is deteriorated.
That is, when the kinematic viscosity of the lubricant applied to the inner surface of the aluminum alloy sheet is 6 × 10 ⁻⁶ m ² / s or more and less than 25 × 10 ⁻⁶ m ² / s, The ability to remove the can can be secured, and the occurrence of punch scratches can be prevented. In particular, when the kinematic viscosity of the lubricant is 6 × 10 ⁻⁶ m ² / s or more and less than 11 × 10 ⁻⁶ m ² / s, the can can be reliably removed and punch scratches can be generated. It can be surely prevented.
On the other hand, if the kinematic viscosity of the lubricant applied to the surface of the aluminum alloy sheet which is the outer surface side of the can is lower than 11 × 10 ⁻⁶ m ² / s, the moldability of the can deteriorates. When the kinematic viscosity is 100 × 10 ⁻⁶ m ² / s or more, the skeleton is difficult to be removed from the mold, and the skeleton remains in the cupping apparatus, thereby inhibiting the production of the can.
On the other hand, the kinematic viscosity of the lubricant applied to the outer surface of the aluminum alloy sheet is 11 × 10 ⁻⁶ m ² / s or more and less than 100 × 10 ⁻⁶ m ² / s. This is because the moldability of the can can be ensured and the cup transportability can be ensured. In particular, when the kinematic viscosity of the lubricant is 25 × 10 ⁻⁶ m ² / s or more and less than 100 × 10 ⁻⁶ m ² / s, the moldability of the can can be reliably ensured, and the punching step In this case, the skeleton does not stick to the mold and is well discharged from the cupping device.

  According to a fourth aspect of the present invention, when manufacturing a can having a cylindrical body, a lubricant is applied to one side and the other side of a plate-like aluminum alloy plate, and then the plate is drawn. In the manufacturing method for manufacturing a can having a cylindrical body by ironing, a surface which is the outer surface side of the can among the surfaces of the plate after applying reoil to the plate-like aluminum alloy plate It is characterized in that a lubricant is applied to the surface.

  According to the method for manufacturing a can having a cylindrical body according to the present invention, after the lubricant is applied, the metal material and the lubricant are well-matched, and the lubricant is applied satisfactorily and the lubricant is released. Furthermore, since the lubricant is not applied to the inner surface of the bottle can among the surfaces of the metal plate material, when the lubricant is applied to the surface of the metal plate material, the temperature of the lubricant and the amount of application can be adjusted. Troublesome management is reduced.

According to a fifth aspect of the present invention, in the method for manufacturing a can having the cylindrical body portion according to the fourth aspect, the kinematic viscosity of the lubricant is 11 × 10 ⁻⁶ m ² / s or more and 100 × 10 ^−. It is less than ⁶ m ² / s. However, it is preferably a lubricant having a kinematic viscosity of 25 ⁻⁶ m ² / s or more and less than 100 ⁻⁶ m ² / s.

  According to the method for manufacturing a can having a cylindrical body according to the present invention, the lubricant capable of ensuring the moldability and cup transportability of the can on the outer surface side of the can of the plate material. Will be applied.

  As described above, according to the present invention, the punch sleeve can be secured from the can such as a flat-bottomed can and a barrel can, and the occurrence of punch scratches can be prevented. It is good, and the skeleton is prevented from remaining in the cupping device, so that the production of a good can can be ensured.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
First, the manufacturing method of the bottle can 51 is demonstrated. As shown in FIG. 1, a bottle can 51 (can having a cylindrical body) includes a cylindrical body 52, a tapered portion 53 that is reduced in diameter toward the distal end side, and a tapered portion 53. A base part 54 formed on the front end side is a main component. The base part 54 mainly includes a hull part 55 bulging in the radial direction, a screw part 56 formed on the front end side of the fog part 55, and a curl part 57 formed on the opening end part 59 of the base part 54. As a component.
Examples of the metal plate material (aluminum alloy plate material) 50 for producing the bottle can 51 include aluminum, an aluminum alloy (aluminum-manganese alloy, etc.), a steel plate, a surface-treated steel plate (galvanized steel plate, tin-plated steel plate) and the like.
In order to manufacture the bottle can 51, first, as shown in FIG. 2, the gravure roller 70 is used to apply the lubricant 40 to the inner surface of the bottle can 51 among the surfaces of the metal plate material 50, and the bottle Lubricant 41 is applied to the outer surface of the can 51.

  As shown in FIG. 2, an oil pan 73a filled with the lubricant 40, an oil pan 73b filled with the lubricant 41, and a gravure roll 75a supplied with the lubricants 40 and 41 from the oil pans 73a and 73b. 75b, doctor blades 74a, 74b scraping off the excessively supplied lubricants 40, 41 to the gravure rolls 75a, 75b, and applicators to which the lubricants 40, 41 accumulated in the cells of the gravure rollers 75a, 75b are transferred Lubricants 40 and 41 are applied to the metal plate material 50 by the gravure roller 70 composed of the rolls 76 a and 76 b and the conveyance roller 72 that conveys the metal plate material 50.

  In this case, the applicator roll 76a applies the lubricant 40 to the inner surface of the metal plate 50, and the applicator roll 76b applies the lubricant 41 to the outer surface of the can. . Specific examples of the lubricants 40 and 41 will be described later.

Here, the kinematic viscosity of the lubricant 40 applied to the inner surface of the bottle can 51 is 6 × 10 ⁻⁶ m ² / s or more and less than 25 × 10 ⁻⁶ m ² / s. The kinematic viscosity of the lubricant 41 on the outer surface side is 11 × 10 ⁻⁶ m ² / s or more and less than 100 × 10 ⁻⁶ m ² / s.
Here, a lubricant having a higher kinematic viscosity than the lubricant 40 is selected. However, the kinematic viscosity of the lubricant 40 is preferably 6 × 10 ⁻⁶ m ² / s or more and less than 11 × 10 ⁻⁶ m ² / s, and the kinematic viscosity of the lubricant 41 is 25 × 10 ⁻⁶ m ^2. / S or more and less than 100 × 10 ⁻⁶ m ² / s.

In this way, the metal plate 50 having the surface coated with the lubricants 40 and 41 is punched into a circular shape, and the circular metal plate 50 is drawn to form a cylindrical cup shown in FIG. 15 is formed. Next, the cup 15 is redrawn and ironed using a DI processing apparatus.
As shown in FIG. 4, the DI processing apparatus has one redraw die 1 having a circular through hole 1a, and is arranged coaxially with the redraw die 1 and has circular through holes 3a, 5a, and 7a. Three ironing dies (Ioning dies) 3, 5, and 7 and cylindrical punch sleeves 9 that can be fitted into the through holes 1a to 7a and are movable in the axial direction, A cylindrical cup holder sleeve 11 fitted to the outside of the punch sleeve 9 is provided. A pilot ring 13 is disposed behind each of the ionizing dies 3 to 7 to prevent the punch sleeve 9 from coming into contact with each die due to an impact when the can comes off each die.

In addition, DI coolant can be supplied to the redraw die 1 and the ionizing dies 3 to 7 for lubrication and cooling.
In the redrawing process by the DI processing apparatus, the cup 15 manufactured by the cupping press which is the previous process is disposed between the punch sleeve 9 and the redrawing die 1, and the cup holder sleeve 11 and the punch sleeve 9 are advanced in this state. Let As a result, the cup holder sleeve 11 presses the bottom surface of the cup 15 against the end surface of the redraw die 1 (two-dot chain point in FIG. 4). Next, while the cup pressing operation by the cup holder sleeve 11 is performed, the punch sleeve 9 pushes the cup 15 into the through hole 1 a of the redraw die 1. As a result, the cup 15 is redrawn to form the cup 15 into a flat bottom can 17 shown in FIG.

  The flat bottom can 17 that has passed through the redraw die 1 further sequentially passes through the through holes 3a to 7a of the ionizing dies 3 to 7, and is gradually ironed, as shown in FIG. 3 (c). Thus, it forms in the can 19 which has predetermined | prescribed thickness. The punch sleeve 9 is formed into a dome shape, for example, by pushing the barrel can 19 after the ironing process is finished further forward and pressing the bottom of the barrel can 19 against the bottom molding die. Here, when the redrawing process and the ironing process are completed, the punch sleeve 9 is pulled out of the barrel can 19 by injecting air into the barrel can 19 from the tip of the punch sleeve 9.

The can body 19 thus obtained is then subjected to a trimming process, followed by a cleaning / surface treatment / drying process, an inner surface painting / baking process, and a necking / screw forming process to form a bottle can 51. .
By the way, in this embodiment, the lubricant 40 is applied to the surface of the metal plate material which is the inner surface side of the bottle can 51. For this reason, even when the punch sleeve 9 is pulled out of the barrel can 19 by injecting air into the barrel can 19, friction is reduced between the inner surface side of the barrel can 19 and the punch sleeve 9. The punch sleeve 9 can be pulled out satisfactorily.
Therefore, the barrel can 19 is prevented from being blown from the punch sleeve 9, the bottom portion of the barrel can 19 is prevented from being bent and bottom deformation is prevented, and a good barrel 19 is formed. It will be.

Further, even during redrawing and ironing, an oil film of the lubricating oil 40 is formed between the cup 15, flat bottom can 17 or body can 19 and the punch sleeve 9, and the punch sleeve 9, cup 15, flat bottom can 17 Or it becomes difficult to contact | abut with the trunk can 19 directly.
Therefore, punch scratches are hardly generated on the inner surface of the cup 15, the flat bottom can 17, or the barrel can 19 by the punch sleeve 9 even during redrawing and ironing.

Also, when punching a circular plate material from the metal plate material 50, the skeleton which is the metal plate material 50 after the circular plate material is punched is discharged well from the cupping device without sticking to the mold. Will be.
Thus, since the skeleton is satisfactorily discharged from the cupping device, the skeleton remains in the cupping device, so that the manufacture of the bottle can 51 is not hindered and the bottle can 51 can be manufactured satisfactorily. it can.
Further, since the lubricating oil 41 is applied to the outer surface side of the cup 15, the flat bottom can 17 or the barrel can 19 during drawing and ironing, the outer surface of the can and the ionizing dies 3, 5, 7 can be obtained. The bottle can 51 can be manufactured with good moldability, in which black streaks, patterns, torso cuts, and the like hardly occur in the can body.

Here, as the lubricants 40, 40, any one can be used as long as it is within the above kinematic viscosity range.
Lubricants 40 and 41 are both water-insoluble squeezing lubricants, and any of mineral oil, synthetic oil, and fat can be used as the base oil. Examples of mineral base oils that can be used for the lubricants 50 and 41 include solvent desorption, solvent extraction, hydrocracking, and the like for lubricating oil fractions obtained by subjecting crude oil to atmospheric distillation and vacuum distillation. Mention may be made of paraffinic or naphthenic mineral oils obtained by appropriately combining one or more purification means such as solvent dewaxing, catalytic dewaxing, hydrorefining, sulfuric acid washing, clay treatment, etc. . Examples of the fat base oil include beef tallow, lard, soybean oil, rapeseed oil, rice bran oil, coconut oil, palm oil, palm kernel oil, and hydrogenated products thereof. Synthetic oil base oils include, for example, polyolefins (ethylene-propylene copolymers, polybutenes, 1-octene oligomers, 1-decene oligomers) and their hydrides, alkylbenzenes, alkylnaphthalenes, esters, polyoxyalkylenes. Examples include glycols, polyphenyl ethers, dialkyl diphenyl ethers, phosphate esters (such as tricresyl phosphate), fluorine-containing compounds (such as perfluoropolyethers and fluorinated polyolefins), and silicone oils. As the base oil of the lubricants 40 and 41, the above base oils may be used alone or in combination of two or more. Among the above-mentioned base oils of the lubricants 40 and 41, from the viewpoint of excellent workability, the ester is 5% by mass or more, preferably 10% by mass or more, more preferably 20% by mass or more based on the total amount of the lubricant. It is desirable to include.

  The alcohol constituting the ester may be a monohydric alcohol or a polyhydric alcohol, and the acid may be a monobasic acid or a polybasic acid. As the monohydric alcohol, those having 1 to 24 carbon atoms, preferably 1 to 12 carbon atoms, more preferably 1 to 8 carbon atoms are usually used. Such alcohols may be linear or branched. Specific examples of the alcohol having 1 to 24 carbon atoms include methanol, ethanol, linear or branched propanol, linear or branched butanol, linear or branched pentanol, linear or branched hexanol, direct Linear or branched heptanol, linear or branched nonanol, linear or branched decanol, linear or branched undecanol, linear or branched dodecanol, linear or branched tridecanol, linear Or branched tetradecanol, linear or branched pentadecanol, linear or branched hexadecanol, linear or branched heptadecanol, linear or branched octadecanol, linear or branched nonadecanol, Straight or branched icosanol, straight or branched heikosano Le, straight or branched docosanol, straight or branched Torikosanoru, straight or branched tetracosanol, and the like and mixtures thereof. As the polyhydric alcohol, those having 2 to 10 valences, preferably 2 to 6 valences are usually used. Specific examples of the divalent to 10-valent polyhydric alcohol include, for example, ethylene glycol, diethylene glycol, polyethylene glycol (3 to 15 mer of ethylene glycol), propylene glycol, dipropylene glycol, and polypropylene glycol (3 to 3 of propylene glycol). 15-mer), 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 2-methyl-1,2-propanediol, 2-methyl-1, Dihydric alcohols such as 3-propanediol, 1,2-pentanediol, 1,3-pentanediol, 1,4-pentanediol, 1,5-pentanediol, neopentylglycol; glycerin, polyglycerin (glycerin 2 ~ 8-mer such as diglycerin, triglyceride Phosphorus, tetraglycerin, etc.), trimethylol alkanes (trimethylol ethane, trimethylol propane, trimethylol butane, etc.) and their 2- to 8-mer, pentaerythritol and their 2- to 4-mer, 1,2,4- Butanetriol, 1,3,5-pentanetriol, 1,2,6-hexanetriol, 1,2,3,4-butanetetrol, sorbitol, sorbitan, sorbitol glycerin condensate, adonitol, arabitol, xylitol, mannitol, etc. Polyhydric alcohols; sugars such as xylose, arabinose, ribose, rhamnose, glucose, fructose, galactose, mannose, sorbose, cellobiose, maltose, isomaltose, trehalose, sucrose, and the like Compounds, and the like. Among these, ethylene glycol, diethylene glycol, polyethylene glycol (ethylene glycol 3-10 mer), propylene glycol, dipropylene glycol, polypropylene glycol (propylene glycol 3-10 mer), 1,3-propanediol, 2-methyl-1,2-propanediol, 2-methyl-1,3-propanediol, neopentyl glycol, glycerin, diglycerin, triglycerin, trimethylolalkane (trimethylolethane, trimethylolpropane, trimethylolbutane, etc. ) And their 2-4 tetramers, pentaerythritol, dipentaerythritol, 1,2,4-butanetriol, 1,3,5-pentanetriol, 1,2,6-hexanetriol, 1, , 3,4 butane tetrol, sorbitol, sorbitan, sorbitol glycerin condensate, adonitol, arabitol, xylitol, divalent to hexavalent polyhydric alcohols such as mannitol, and mixtures thereof are more preferred. More preferred are ethylene glycol, propylene glycol, neopentyl glycol, glycerin, trimethylol ethane, trimethylol propane, pentaerythritol, sorbitan, and mixtures thereof.

As the monobasic acid, a fatty acid having 6 to 24 carbon atoms is usually used. Such fatty acids may be linear or branched, and may be saturated or unsaturated. Specific examples of the fatty acid having 6 to 24 carbon atoms include linear or branched hexanoic acid, linear or branched heptanoic acid, linear or branched octanoic acid, linear or Branched nonanoic acid, linear or branched decanoic acid, linear or branched undecanoic acid, linear or branched dodecanoic acid, linear or branched tridecanoic acid, linear or Branched tetradecanoic acid, linear or branched pentadecanoic acid, linear or branched hexadecanoic acid, linear or branched heptadecanoic acid, linear or branched octadecanoic acid, linear or Branched nonadecanoic acid, linear or branched icosanoic acid, linear or branched henicosanoic acid, linear or branched docosanoic acid, linear or branched tricosanoic acid, linear or Saturated fatty acids such as branched tetracosanoic acid, or linear or branched hexenoic acid, linear or branched heptenoic acid, linear or branched octenoic acid, linear or branched nonene Acid, linear or branched decenoic acid, linear or branched undecenoic acid, linear or branched dodecenoic acid, linear or branched tridecenoic acid, linear or branched tetradecene Acid, linear or branched pentadecenoic acid, linear or branched hexadecenoic acid, linear or branched heptadecenoic acid, linear or branched octadecenoic acid, linear or branched nonadecene Acid, linear or branched icosenoic acid, linear or branched henicosenoic acid, linear or branched docosenoic acid, linear or branched tricosenoic acid, linear or branched Unsaturated fatty acids such as Jo of tetracosenoic acid, and mixtures thereof. Among these, saturated fatty acids having 8 to 20 carbon atoms, unsaturated fatty acids having 8 to 20 carbon atoms, and mixtures thereof are particularly preferable. Examples of the polybasic acid include dibasic acids having 2 to 16 carbon atoms and trimellitic acid. The dibasic acid having 2 to 16 carbon atoms may be linear or branched, and may be saturated or unsaturated.
Specifically, for example, ethanedioic acid, propanedioic acid, linear or branched butanedioic acid, linear or branched pentanedioic acid, linear or branched hexanedioic acid, linear Or branched heptanedioic acid, linear or branched octanedioic acid, linear or branched nonanedioic acid, linear or branched decanedioic acid, linear or branched undecanedioic acid Acid, linear or branched dodecanedioic acid, linear or branched tridecanedioic acid, linear or branched tetradecanedioic acid, linear or branched pentadecanedioic acid, linear or Saturated dibasic acids such as branched hexadecanedioic acid, linear or branched butenedioic acid, linear or branched pentenedioic acid, linear or branched hexenedioic acid, linear or Branched heptenedioic acid, linear or branched Octenedioic acid, linear or branched nonenedioic acid, linear or branched decenedioic acid, linear or branched undecenedioic acid, linear or branched dodecenedioic acid, linear Unsaturated dibasic acids such as linear or branched tridecene diacids, linear or branched tetradecene diacids, linear or branched pentadecene diacids, linear or branched hexadecene diacids, and These mixtures etc. are mentioned.

  Moreover, as a combination of alcohol and acid, (1) ester of monohydric alcohol and monobasic acid (2) ester of polyhydric alcohol and monobasic acid (3) ester of monohydric alcohol and polybasic acid (4) ester of polyhydric alcohol and polybasic acid (5) monohydric alcohol, mixture of polyhydric alcohol and polybasic acid (6) mixture of polyhydric alcohol, monobasic acid and polybasic acid (7) Arbitrary combinations such as monohydric alcohols, mixtures of polyhydric alcohols with monobasic acids, polybasic acids, and the like are possible. When polyhydric alcohol is used as the alcohol component, it may be a complete ester in which all the hydroxyl groups in the polyhydric alcohol are esterified, or a partial ester in which some of the hydroxyl groups are not esterified and remain as hydroxyl groups. May be. In addition, when a polybasic acid is used as the acid component, it may be a complete ester in which all the carboxyl groups in the polybasic acid are esterified, and a portion of the carboxyl group that remains as a carboxyl group without being esterified Esters may be used. As the base oil of the lubricants 40 and 41, one or two or more esters selected from the above (1), (2), (3) and (4) are used in order to further improve workability. It is preferable to use it. Further, among these, one or more esters selected from (1), (2) and (4) are more preferable, and one or more esters selected from (1) and (2) The ester of (2) is even more preferred, and it is most preferred to use one or more of the esters of (2).

As the lubricants 40 and 41, those composed only of the above-described base oil may be used, but those obtained by appropriately adding an additive to the base oil may be used. Examples of such additives include oily agents, extreme pressure agents, corrosion inhibitors, detergents, dispersants, antioxidants, and antifoaming agents. Examples of the oily agent include fatty acids, higher alcohols, amines and amides. Examples of extreme pressure agents include phosphorus compounds such as tricresyl phosphate, sulfur compounds such as sulfurized fats and oils, polysulfides, chlorine compounds such as chlorinated paraffin, zinc dialkyldithiophosphate, molybdenum dialkyldithiophosphate, zinc And organometallic compounds such as dialkyldithiocarbamate and molybdenum dialkyldithiocarbamate. Examples of the corrosion inhibitor include benzotriazole, mercaptobenzothiazole, mercaptobenzothiazole sodium salt, and tolyltriazole. Examples of the detergent include alkali metal or alkaline earth metal sulfonate, alkali metal or alkaline earth metal salicylate, alkali metal or alkaline earth metal phenate, and fatty acid soap. Examples of the dispersant include alkenyl succinimide (including those modified with boric acid), nonionic surfactants, and the like.
Examples of the antioxidant include phenolic compounds such as 2,6-ditertiarybutyl-p-cresol (DBPC), aromatic amines such as phenyl-α-naphthylamine, and the like. Examples of the antifoaming agent include silicon compounds, higher alcohols, metal soaps, amides, and ethylene-propylene copolymers. The content of these additives is 5% by mass or less, preferably 1% by mass or less (both based on the total amount of lubricants 40 and 41).
In addition, the said lubricants 40 and 41 can set kinematic viscosity in 40 degreeC in the range of 5 * 10 < ^-6 > m < ² > / s or more and 70 * 10 < ^-6 > m < ² > / s.

  In the present embodiment, as shown in FIG. 2, the lubricants 40 and 41 are applied using the gravure roller 70, but the present invention is not limited to this. That is, any coating apparatus that can vary the lubricant applied to one and the other of the surfaces of the metal plate 50 may be used.

In the present embodiment, the lubricants 40 and 41 are applied without applying reoil to the metal plate material 51. For this reason, the step of applying reoil can be omitted, and the manufacturing time can be shortened.
Further, the lubricants 40 and 41 may be applied after reoiling.
When the lubricants 40 and 41 are applied to the metal plate 51 to which reoiling has been applied, the metal material and the lubricants 40 and 41 become more familiar, the lubricants 40 and 41 are applied satisfactorily, and the lubricants 40 and 41 are detached. No longer. For this reason, the lubricating oils 40 and 41 are uniformly formed, and the lubricants 40 and 41 are prevented from being formed thick or thin on a part of the surface of the metal plate 50. Therefore, the punch sleeve 9 can be reliably pulled out, punch scratches can be prevented, can moldability can be ensured, and cup transportability can be ensured.

Furthermore, after applying reoil to the metal plate material 50, the lubricant 41 may be applied to the surface of the metal plate material 50 that is the outer surface side of the bottle 51 can.
In this case, since the lubricant 40 is not applied to the inner surface of the bottle can 51 among the surfaces of the metal plate material 50, the temperature and application of the lubricant 40 when the lubricant 40 is applied to the surface of the metal plate material. Troublesome management such as adjusting the amount can be reduced.
The reoil is of the same properties as the lubricants 40 and 41, and the kinematic viscosity is the same as or lower than that of the lubricant.

  Here, in Table 1, lubricating oils 40 and 41 having various kinematic viscosities were applied to the surface of the aluminum alloy plate material, and evaluation was made on the slipping property, punch scratch, formability, and the presence or absence of jam in the cupping press. . In performing this evaluation, the lubricants 40 and 41 are applied to the aluminum alloy sheet without reoiling.

Here, the unit of kinematic viscosity of the lubricants 40 and 41 is (cSt = 10 ⁻⁶ m ² / s).
Further, the detachability is an evaluation of whether the punch sleeve is easily detached from the can after completion of the redrawing / ironing process. The punch scratch is an evaluation of whether the punch sleeve 9 causes a scratch on the inner surface side of the can in the process of redrawing and ironing. Formability is an evaluation of whether black streaks, torso cuts, etc. occur on the outer surface of the can during drawing, redrawing and ironing processes. The presence or absence of jam in the cupping press means that, after the punching process, the skeleton, which is a metal plate from which a circular plate is punched, is not discharged from the cupping device, and the skeleton is crushed and remains in the cupping device. It is evaluated for the presence or absence.
The coating amount is 30 to 40 mg / cup, and the reduction is 45%.
With respect to pull-out property, the number of test cans is evaluated as 1 million cans. Here, ◯ means a case where there is no can that causes bottom deformation among the test cans. Further, Δ means that the number of cans causing bottom deformation is less than 30% of the test cans. Furthermore, x means that cans with small bottom deformation account for 30% or more of the test cans, or one or more cans with large bottom deformation occur.
Punch scratches are made by visual inspection. Here, ○ means a case where no scratch is recognized on the inner surface of the can. Further, Δ means that the scratch formed on the inner surface of the can is extremely thin. Furthermore, x means that the scratch formed on the inner surface side of the can is deep.
The moldability is evaluated based on whether or not a test can has 1,000,000 cans, whether or not the torso is cut, and scratches on the outer surface of the can. Here, “◯” means that, among the test cans, the number of cans that are torn out is 10 or less, and there are no noticeable scratches on the outer surface side of the can. In addition, Δ means that the number of cans that are torn down is less than 50, and there are no noticeable scratches on the outer surface. Furthermore, x means that there are 50 or more cans in which the body is cut or there are noticeable scratches on the outer surface.
The jam in the cupping press is evaluated based on whether or not a jam occurs in the cupping apparatus.
Here, the jam in the cupping press means that the skeleton sticks to the mold and remains in the cupping apparatus during the punching process. Here, ◯ means a case where no jam occurs in the cupping device. Moreover, x means that even one jam may occur in the cupping device.

As can be seen from the results in Table 1, the kinematic viscosity is 6 × 10 ⁻⁶ m ² / s or more to less than 25 × 10 ⁻⁶ m ² / s on the inner surface of the can of the surface of the metal plate 50. When the lubricant 40 in the range is applied, it is possible to ensure the slipping-out property and prevent the occurrence of punch scratches. In particular, when the kinematic viscosity is in the range of 6 × 10 ⁻⁶ m ² / s or more to less than 11 × 10 ⁻⁶ m ² / s, it is possible to ensure good slipping out and ensure punch scratches. Can be prevented.
In addition, a lubricant 41 having a kinematic viscosity in the range of 11 × 10 ⁻⁶ m ² / s or more to less than 100 × 10 ⁻⁶ m ² / s was applied to the surface of the metal plate material on the outer surface side of the can. In some cases, black streaks and torso cuts can be prevented and the moldability of the can can be ensured. Furthermore, since the skeleton is satisfactorily removed from the mold during the punching process, the skeleton does not remain in the cupping apparatus, and the can can be manufactured satisfactorily.
In particular, when lubricants 40 and 41 having a kinematic viscosity of 25 × 10 ⁻⁶ m ² / s or more and less than 100 × 10 ⁻⁶ m ² / s are applied, the moldability of the can must be ensured. On the other hand, the skeleton will be well discharged from the cupping device.

It is a front view of the bottle can which concerns on embodiment of this invention. It is the schematic of the gravure roller which apply | coats a lubricant to the surface of a metal material. It is a figure which shows the process of a drawing and ironing process. It is the schematic of DI processing apparatus.

Explanation of symbols

40, 41 Lubricant 50 Metal plate material (aluminum alloy plate material) 51 Bottle can (can with cylindrical body) 70 Gravure roller

Claims (5)

When manufacturing a can having a cylindrical body, the cylindrical material is formed by drawing and ironing the plate material after applying a lubricant to one side and the other side of the plate-like aluminum alloy. In a manufacturing method for manufacturing a can having a body part of
The manufacturing method of the can provided with the cylindrical trunk | drum characterized by the property of the said lubricant differing in said one surface and said other surface of the said board | plate material. In the manufacturing method of the can provided with the said cylindrical trunk | drum part of Claim 1,
The kinematic viscosity of the lubricant applied to the surface on the outer surface side of the can among the surfaces of the plate material is higher than the kinematic viscosity of the lubricant applied to the surface on the inner surface side of the surface of the plate material The manufacturing method of the can provided with the cylindrical trunk | drum used. In the manufacturing method of the can provided with the cylindrical trunk | drum part of Claim 2,
The kinematic viscosity of the lubricant applied to the inner surface of the plate material is 6 × 10 ⁻⁶ m ² / s or more and less than 25 × 10 ⁻⁶ m ² / s, and is on the outer surface side. A method for producing a can having a cylindrical body, wherein the kinematic viscosity of the lubricant applied to the surface is 11 × 10 ⁻⁶ m ² / s or more and less than 100 × 10 ⁻⁶ m ² / s. . When manufacturing a can having a cylindrical body, a cylindrical aluminum alloy sheet is coated with a lubricant on one side and the other side, and then the sheet is drawn and ironed to form a cylindrical shape. In a manufacturing method for manufacturing a can having a torso,
After applying reoil to the plate-shaped aluminum alloy plate material, a lubricant is applied to the surface of the plate material on the outer surface side of the can. Method. In the manufacturing method of the can provided with the cylindrical trunk | drum part of Claim 4,
Can manufacturing method of having a tubular body portion, wherein the kinematic viscosity of the lubricant is less than 11 × ¹⁰ -6 ^m 2 / s or more ^{100 × 10 -6 m 2 / s} .

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