WO1999025502A1 - Procede de production de recipient cylindrique chaudronne et recipient cylindrique chaudronne - Google Patents

Procede de production de recipient cylindrique chaudronne et recipient cylindrique chaudronne Download PDF

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Publication number
WO1999025502A1
WO1999025502A1 PCT/JP1998/005059 JP9805059W WO9925502A1 WO 1999025502 A1 WO1999025502 A1 WO 1999025502A1 JP 9805059 W JP9805059 W JP 9805059W WO 9925502 A1 WO9925502 A1 WO 9925502A1
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WO
WIPO (PCT)
Prior art keywords
cylindrical container
resin
metal plate
plate
blank
Prior art date
Application number
PCT/JP1998/005059
Other languages
English (en)
Japanese (ja)
Inventor
Yasuyuki Ikeda
Keiichi Shimizu
Original Assignee
Toyo Kohan Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyo Kohan Co., Ltd. filed Critical Toyo Kohan Co., Ltd.
Priority to AU97637/98A priority Critical patent/AU9763798A/en
Publication of WO1999025502A1 publication Critical patent/WO1999025502A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/30—Deep-drawing to finish articles formed by deep-drawing

Definitions

  • the present invention relates to an ironed cylindrical container for forming an ironing can by punching a blank having a hexagonal basic shape from a metal plate or a resin-coated metal plate and subjecting the blank to multiple steps of ironing.
  • the present invention relates to a manufacturing method, and an ironing cylindrical container.
  • the inventors of the present invention conducted various experiments to change the anisotropy, the number of blanks punched in the sheet width direction, and the like in order to reduce the occurrence of unnecessary portions in blanking.
  • cornering is rounded with a radius of curvature within a certain range, the generation of unnecessary parts is minimized, the occurrence of ears in brazing is suppressed, and long metal is produced with the maximum production yield.
  • a cylindrical container can be continuously formed from a sheet or a resin-coated metal sheet.
  • a long metal plate or a resin-coated metal plate is formed into a cylindrical container by processing mainly by ironing
  • unnecessary portions other than blank portions to be punched are reduced, and the blank is formed into a cylinder.
  • a method of forming a blank obtained by using a blanking method that produces a low level of ears at the time of squeezing into an ironed cylindrical container with a maximum yield by applying ironing mainly, and a method therefor. It is an object of the present invention to provide an ironing cylindrical container formed by processing. Disclosure of the invention
  • the method for manufacturing the ironed cylindrical container of the present invention is as follows.
  • the basic shape of a long rolled metal plate or a resin-coated metal plate is a hexagon whose two sides facing each other are substantially parallel, and each corner around the hexagon is formed in an arc shape.
  • a pair of two substantially parallel sides of the hexagon facing each other form an angle of 80 to 100 ° with respect to the rolling direction of the metal plate or the resin-coated metal plate. Blanking process,
  • a process to make a can, and It is characterized by comprising a trimming step of trimming the upper end of the ironing can in the circumferential direction and removing the same, and a step of necking and flange-forming the opened upper end after trimming.
  • a metal plate a cold-rolled steel plate with a thickness of 0.13 to 0.30 mm and tin-plated, or an aluminum plate with a thickness of 0.15 to 0.35 mm It is preferable to use an alloy plate.
  • a resin-coated metal plate in which an electrolytic chromic acid-treated steel plate having a plate thickness of 0.13 to 0.30 mm is coated with a polyester resin, or an original plate is 0.15 to 0.30 mm
  • a phosphoric acid chromate treatment it is preferable to use a phosphoric acid chromate treatment, an alumite treatment, or a zirconium phosphate treatment as the surface treatment.
  • an ironed cylindrical container of the present invention is characterized by being formed by using any one of the above-mentioned production methods.
  • the ironing can referred to here was formed by a process including one to several stages of drawing steps performed to draw a blank into a cup having a predetermined final can diameter before ironing. Means things. BRIEF DESCRIPTION OF THE FIGURES
  • FIG. 1 (A) shown in Fig. 1 is a schematic diagram in the case of punching a circular blank, and (b) shown in Fig. 1 is the angle formed by one side of a hexagon with respect to the rolling direction in a blank having a regular hexagonal basic shape. 90. It is a schematic diagram in the case of punching out so that it may become.
  • FIG. 2 (c) is a schematic diagram when blanks having a regular hexagonal basic shape are punched out so that the angle of one side of the hexagon with respect to the rolling direction deviates from 90 °.
  • FIG. 3 shows a blank whose basic shape is a hexagon in which a pair of opposing sides are non-parallel to each other, in which the angle of one side of the hexagon to the rolling direction of the metal plate is 90 °.
  • E shown in Fig. 3 shows a hexagon in which the lengths of the sides are equal, the angles of a pair of opposite corners are equal, and the angles of adjacent corners are different.
  • FIG. 4 is a schematic diagram in the case where a blank having a basic shape is punched so that an angle formed by one side of a hexagon with respect to a rolling direction of a steel sheet is 90 °.
  • FIG. 4 is a schematic diagram in a case where a blank to be formed is punched so that an angle formed by one side of a hexagon with respect to a rolling direction of a metal plate is 90 °.
  • FIG. 5 is a schematic view of a cup-shaped drawn can formed by forming a blank by drawing.
  • Fig. 6 is a schematic view of a flanged or ironed can formed by forming a blank into a cup-shaped drawn can and subjecting the drawn can to multiple stages of ironing.
  • FIG. 7 is a schematic diagram showing the final empty can shape.
  • the present invention reduces unnecessary portions other than blank portions to be punched when forming a long metal plate or a resin-coated metal plate into an ironed cylindrical container, and generates ears when the blank is formed into a cylindrical container.
  • a blanking method using a blanking method that reduces the extent to which the ears are generated when a circular blank is drawn, and then forming the ironed cylindrical container at a high yield using the blank.
  • a hexagonal shape whose two opposing sides are substantially parallel to each other is used as a basic shape from a long metal plate or a resin-coated metal plate.
  • a blank having a shape in which each peripheral corner is rounded in an arc shape, a pair of two substantially parallel sides of a hexagon opposed to each other is set to 8 i C 5 to 95 with respect to the rolling direction of the metal plate. °
  • the blank is punched at an angle of 80 to 100 °, the blank is drawn into a cup shape, and then the can is ironed by one to multiple steps.
  • W metal plate or a resin-coated metal plate is not particularly limited as long as it can be ironed, but a cold-rolled steel plate having a plate thickness of 0.13 to 0.30 mm, or Aluminum alloy plates having a plate thickness of 0.15 to 0.35 mm are preferred.
  • a cold-rolled steel plate having a plate thickness of 0.13 to 0.30 mm or Aluminum alloy plates having a plate thickness of 0.15 to 0.35 mm are preferred.
  • the upper limit is set to 0.30 mm from the viewpoint of economy.
  • Aluminum alloy For metal sheets the upper and lower limits of the sheet thickness are determined for the same reason as for cold-rolled steel sheets.
  • a tin-plated steel plate or a JIS standard 300-based aluminum alloy plate is preferably used as the metal plate.
  • the metal plate is subjected to a surface treatment in order to ensure good processing adhesion between the metal plate and the resin to be coated thereon. In the case of a cold rolled steel sheet, electrolytic chromic acid treatment is performed.
  • the electrolytic chromic acid treatment is performed by using a so-called fluoride bath composed of an aqueous solution of chromic anhydride and sodium fluoride, or a so-called sulfuric acid bath composed of an aqueous solution of chromic anhydride and sulfuric acid.
  • concentration of chromic anhydride is preferably in the range of 10 to 100 g / 1, more preferably in the range of 20 to 60 g / 1.
  • the concentration of sodium fluoride is preferably in the range of 0.5 to 30 g Z1, more preferably in the range of 2 to 20 g / 1.
  • the concentration of sulfuric acid is preferably in the range of 0.1 to 10 g Zl.
  • the temperature of the treatment liquid is preferably in the range of room temperature to 60 ° C, more preferably in the range of room temperature to 40 ° C.
  • Cathode current density is preferably in the range of 5 ⁇ 1 0 0 A / dm 2 .
  • Coating consists of two layers of a metallic chromium layer and the upper layer a lower chromium hydrated oxide layer, coating amount is preferably in the range of 3 ⁇ 3 0 O mg Zm 2 in total chromium amount combined both A range of 5 to 200 mg / m 2 is more preferred.
  • silane treatment a commercially available silane coupling agent is diluted in a solvent, applied to an aluminum alloy plate, and dried.
  • a solvent water alone can be used, which is preferable in terms of operation, but a mixed solvent of ethanol and water is preferable in terms of characteristics.
  • the mixing ratio of ethanol to water is more than 1: 4, the silane coupling agent is sufficiently uniformly dispersed in the mixed solution, but the cost of ethanol is high and the cost is not advantageous.
  • the mixing ratio is less than 4: 1, the silane coupling agent will not disperse sufficiently uniformly in the mixed solution, and it will take a long time to dry after being applied to the aluminum alloy surface.
  • the concentration of the silane coupling agent is preferably in the range of 0.5 to 20%, more preferably in the range of 1 to 10%, based on the mixed solution.
  • the temperature of the treatment liquid is preferably in the range of room temperature to 60 ° C, more preferably in the range of room temperature to 40 ° C.
  • the temperature of the treatment liquid is preferably in the range of room temperature to 60 ° C, more preferably in the range of room temperature to 40 ° C.
  • As a treatment method after immersing the aluminum alloy plate in the treatment liquid, excess liquid is squeezed with a roll and then dried. An immersion time of 1 to 15 seconds is sufficient, with a range of 3 to 10 seconds being more preferred.
  • Processing amount is preferably in a range of from 0. 3 ⁇ 3 Omg / m 2 as silicon, more preferably in the range of 1 ⁇ 1 Omg / m 2.
  • the phosphoric acid chromate treatment is performed by using a commercially available phosphoric acid chromate treatment solution.
  • the temperature of the treatment liquid is preferably in the range of room temperature to 80 ° C, more preferably in the range of room temperature to 60 ° C.
  • a processing time of 1 to 10 seconds is sufficient, and a range of 1 to 5 seconds is more preferable.
  • Coating amount is preferably in the range of 3 to 5 Omg / m 2 as chromium, the range of 5 ⁇ 30MgZm 2 is more preferable.
  • the coating weight is less than 3MgZm 2 as chromium almost no effect in improving the adhesion, 5 as Omg / m locally coating becomes large adhesion amount exceeds the 2 decreases the adhesion becomes uneven The appearance is dark brown, which is not desirable.
  • the above silane treatment is performed.
  • the alumite treatment carried out in the present invention is performed by the usual molding Unlike alumite treatment, which is performed after processing to obtain a thick film that does not require workability, the film coated on the alumite treatment layer has excellent adhesion even when subjected to severe molding processing, What is required is a thin processing film that can be continuously processed in a short time.
  • the method of anodizing by direct current electrolysis in an acid solution is most preferable.
  • the method using an alkaline solution requires a long time to wash and remove the alkaline solution remaining on the surface of the aluminum alloy plate after the treatment, and the adhesion of the film coated thereon is not sufficient.
  • the AC electrolysis method requires a long time to form an alumite film and is not suitable for high-speed processing.
  • borax is added to an aqueous boric acid solution as an acid solution.
  • the concentration of boric acid is preferably in the range of 5 to 100 g / 1. Below 5 g Zl, the conductivity of the processing solution is low, the processing current density cannot be increased, and it takes a long time to form a processing film having a predetermined thickness, which is not preferable. On the other hand, if it exceeds 100 g / 1, the amount attached to the aluminum alloy plate during continuous processing and taken out of the processing tank increases, which is not advantageous in cost. It is preferable to add borax to the boric acid solution at a concentration of 1 to 50 g / 1 to stabilize the treatment bath.
  • the bath temperature is preferably in the range of room temperature to 60 ° C.
  • the anode current density is preferably in the range of 2.5 to 50 AZ dm 2 and more preferably in the range of 3 to 20 A / dm 2 .
  • the anodic current density is less than 2.5 A / dm 2 , it takes a long time to form a film, which is not preferable in terms of productivity, and it is difficult to form a uniform thin film.
  • the electrolysis voltage becomes too high, and uneven appearance such as burning tends to occur, and a uniform thin film is hardly formed.
  • the time required for electrolysis is 0.:! A film having a sufficient thickness can be obtained in about 10 seconds. After the alumite treatment, the silane treatment is performed.
  • a treatment in which a silane treatment is performed after the zirconium phosphate treatment is performed using the treatment bath shown below under the treatment conditions shown below to form a treated film.
  • Coating weight 3-5 range O mg / m 2 is preferred as zirconium, 7-1 of 5 mg / m 2 range is more preferable. If the coating weight is less than 3 mg / m 2 on a zirconium almost no effect in improving the adhesion, so that many become locally coating adhesion amount exceeds the 50MgZm 2 is unevenly-than adhesion is lowered And becomes unfavorable.
  • the silane treatment is performed.
  • the resin to be coated may be one of polyethylene, polypropylene, polyester, polyamide, polycarbonate, polyvinyl chloride, polyvinylidene chloride, acrylic resin, copolymer resin of two or more types, or composite resin blending two or more types. Is raised.
  • These thermoplastic resins have different properties such as heat resistance, corrosion resistance, workability, and adhesiveness, but should be selected according to the intended use. For example, for cans that are subjected to particularly severe forming such as drawing after drawing and then ironing, copolymers mainly composed of polyester, especially polyethylene terephthalate and ethylene terephthalate units are used.
  • a film composed of polyester, polyester mainly composed of butylene terephthalate units, and a composite resin obtained by blending these it is more preferable to use these resins as a resin film stretched and oriented in the biaxial direction.
  • a composite resin made by blending the above polyester with polycarbonate use a composite resin made by blending the above polyester with polycarbonate. Film or two-layer film with the above composite resin as the upper layer and the above polyester as the lower layer, or three layers with the above polyester as the upper and lower layers and the above polycarbonate as the intermediate layer It is preferable to use a film of These resins are biaxially stretched and oriented resin films.
  • thermosetting resin such as an epoxy resin may be interposed between the resin layer and the metal plate as a primer.
  • Yield when punching three types of blanks in a circular arc shape (radius of curvature: R 0 to 50 mm) from a long electrolytic chromic steel sheet coated with the resin shown below, for example. Unnecessary part generation rate).
  • the yield can be improved by reducing the radius of curvature R, but even if the anisotropy of the metal material or the drawing method is changed, a drawn can with a small ear in the intended drawing cannot be obtained. That is, there is a lower limit of the radius of curvature R from the point of ear occurrence.
  • Table 1 when the number n of blanks punched in the sheet width direction is 2 or less as shown in Table 1, the yield is low for blanks of all circles, dodecagons, and hexagons, and blanks punched in the sheet width direction
  • the number n is preferably at least 3 or more.
  • the other four sets are placed in the back row, and the die sets in the front and rear rows are arranged so that the centers are staggered in the direction parallel to the rolling direction (longitudinal direction), and the blanks are punched at equal intervals So that the continuous punching Attached to the computer.
  • the margin (side bridge) in the width direction was made equal at both ends. In this way, circular blanks were continuously punched from a resin-coated steel sheet with 1 ton of cold-rolled steel sheet as the coating base sheet, and about 33,000 blanks were obtained.
  • ⁇ 0 is the back row
  • the centers of the front and back die sets are arranged in a zigzag pattern in the direction parallel to the rolling direction (longitudinal direction), and the spacing between each pseudo-hexagonal blank is the same as that for a circular blank It was attached to a continuous punching press so as to be punched at equal intervals.
  • the resin-coated steel sheet has the same steel type and thickness as the one used for punching circular blanks, and the margin (side bridge) in the width direction is the same as that used for punching circular blanks.
  • Seven sets were prepared, three sets were set as the front row, and they were arranged so that they were on the same line in the direction perpendicular to the rolling direction at the time of cold rolling of the steel sheet (the sheet width direction), and the other four sets were set as the back row, and the die set in the front and rear rows Are arranged in a zigzag pattern in the direction parallel to the rolling direction (longitudinal direction), and the quasi-hexagonal blanks are continuously punched at equal intervals as in the case of a circular blank. It was attached to a punching press.
  • the resin-coated steel sheet is made of the same steel type and the same thickness as the one used for punching circular blanks, and the margin (side bridge) in the width direction is the same as that for punching circular blanks.
  • One having an adjusted plate width was used.
  • Continuous punching from a resin-coated steel sheet using a 1-ton cold-rolled steel sheet as a coating base sheet in this way yielded approximately 34,700 blanks.
  • the blank to be punched is basically a hexagon rather than a circle or a regular dodecagon and a rounded corner. It was confirmed that the yield of blanking can be greatly improved by adopting the shape and the rounded shape.
  • blanks are formed into hexagons with rounded corners with a certain range of radius of curvature, and blanking is performed with the best yield by selecting the number of blanks in the width direction that has the best yield. It turns out that it is possible. Furthermore, considering the manufacturing of dies for punching blanks, dies having a hexagonal cross section can be manufactured much more easily than dodecagonal dies having a complex punching cross section.
  • Blanks were prepared from the test materials shown in Tables 2 and 3 under the following conditions, as shown in Figures 1 and 2.
  • a drawing process was used to draw a 90 mm can diameter cupless flange without a flange as shown in Figure 5. It was a can.
  • a one-stage redrawing process and a three-stage ironing process were performed at the same time to obtain an ironed cylindrical container without a flange with a can diameter of 65 mm as shown in FIG.
  • Rolling direction deviation angle (0) 90 ° (the angle formed by one side of the hexagon with respect to the rolling direction of the metal plate, and so on)
  • Table 2 2 types of metal plates and 4 types of resin-coated metal plates selected from the above conditions, 64 types Tables 4 to 7 show the blanking conditions and the size of the obtained cylindrical container ears. Regarding the size of the ears, the difference between the height at the highest valley and the height at the lowest valley was determined as the ear at the valleys and peaks formed at the upper end of the ironed cylindrical container. Table 2
  • the two parallel sides of the regular hexagon are in a direction in which the deflection angle in the rolling direction is slightly deviated from 90 °, and the corners are arc-shaped.
  • the yield i does not decrease if the deviation from the vertical direction is within ⁇ 10 °, and no extremely large ears are generated. If the deviation is within ⁇ 5 °, almost good yield is obtained. No large ears were found to occur.
  • the sides of the hexagon are equal in length, the angles of a pair of opposite corners are equal, and the angles of adjacent corners are different, and the corners are circular.
  • the ears are not so large and are almost in the good range as long as the deviation from the adjacent angle of 120 ° is small.
  • the angles of the six corners are equal, and the length of two sides perpendicular to the rolling direction of the six sides is different from the length of the other four sides.
  • the corners are rounded into an arc and blanked, the ears are not very large and are in good range, as long as the ratio of the different lengths is low.
  • a cylindrical container having no flange or a cylindrical shape formed in this manner is After trimming in the circumferential direction at the 3 mm part to remove the ear occurrence part, use a known method to neck-open the upper end after trimming, continue to flange, fill the contents, and tighten the lid Although it was molded into the final empty can shape shown in Fig. 7, it could be molded into the final empty can shape without any resin peeling during or after processing.
  • the present invention is based on a hexagon in which two opposite sides of a long rolled metal plate or a resin-coated metal plate obtained by coating a metal plate with a resin film are parallel to each other.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

L'invention concerne un procédé de production à rendement maximum d'un récipient cylindrique chaudronné, qui consiste à emboutir une feuille de métal allongée de sorte qu'elle prenne la forme d'une coupelle et à chaudronner ladite ébauche de sorte qu'un récipient cylindrique soit formé, que les parties inutiles autres que la partie de l'ébauche découpée à la matrice soit réduites, et que l'apparition de saillies lors du moulage de l'ébauche pour qu'elle prenne une forme cylindrique soit limitée au minimum. L'invention porte aussi sur un récipient cylindrique chaudronné formé selon ledit procédé, qui consiste à découper une ébauche à la matrice de sorte qu'elle prenne une forme hexagonale à deux côtés parallèles opposés et que ses coins entre les côtés aient, à la base, une forme arquée, et à chaudronner l'ébauche de sorte qu'un récipient cylindrique soit formé.
PCT/JP1998/005059 1997-11-14 1998-11-10 Procede de production de recipient cylindrique chaudronne et recipient cylindrique chaudronne WO1999025502A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU97637/98A AU9763798A (en) 1997-11-14 1998-11-10 Production method of ironed cylindrical container and the ironed cylindrical container

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP9/329664 1997-11-14
JP32966497 1997-11-14

Publications (1)

Publication Number Publication Date
WO1999025502A1 true WO1999025502A1 (fr) 1999-05-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1998/005059 WO1999025502A1 (fr) 1997-11-14 1998-11-10 Procede de production de recipient cylindrique chaudronne et recipient cylindrique chaudronne

Country Status (2)

Country Link
AU (1) AU9763798A (fr)
WO (1) WO1999025502A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50143777A (fr) * 1974-05-08 1975-11-19
JPS6089932U (ja) * 1983-11-18 1985-06-20 アイダエンジニアリング株式会社 円筒絞り用のブランク
JPH05305359A (ja) * 1992-05-06 1993-11-19 Sumitomo Light Metal Ind Ltd 容器の深絞り加工方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50143777A (fr) * 1974-05-08 1975-11-19
JPS6089932U (ja) * 1983-11-18 1985-06-20 アイダエンジニアリング株式会社 円筒絞り用のブランク
JPH05305359A (ja) * 1992-05-06 1993-11-19 Sumitomo Light Metal Ind Ltd 容器の深絞り加工方法

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Publication number Publication date
AU9763798A (en) 1999-06-07

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