WO2006040857A1 - マンガン乾電池負極亜鉛材料の製造方法 - Google Patents
マンガン乾電池負極亜鉛材料の製造方法 Download PDFInfo
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- WO2006040857A1 WO2006040857A1 PCT/JP2005/010378 JP2005010378W WO2006040857A1 WO 2006040857 A1 WO2006040857 A1 WO 2006040857A1 JP 2005010378 W JP2005010378 W JP 2005010378W WO 2006040857 A1 WO2006040857 A1 WO 2006040857A1
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- Prior art keywords
- zinc
- negative electrode
- rolling
- zinc alloy
- lead
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0602—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a casting wheel and belt, e.g. Properzi-process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/06—Electrodes for primary cells
- H01M4/08—Processes of manufacture
- H01M4/12—Processes of manufacture of consumable metal or alloy electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/24—Electrodes for alkaline accumulators
- H01M4/244—Zinc electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
- H01M4/42—Alloys based on zinc
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a method for producing a negative electrode zinc material for a manganese dry battery, which is less polluting than conventional methods in which lead is not actively added to zinc, which is a negative electrode active material.
- zinc which is a negative electrode active material for manganese dry batteries
- lead is usually added with 0.1 to 0.7% by mass of lead for the purpose of imparting workability and corrosion resistance of the zinc plate.
- lead has a ductility and prevents cracking around the zinc plate during rolling and prevents cracking during canning.
- the added lead also prevents corrosion due to self-discharge by imparting corrosion resistance to the electrolyte and corrosive impurities when zinc is used as the negative electrode in the battery.
- lead is an effective metal additive element that imparts both workability and anticorrosion effects to the negative electrode zinc, and from these remarkable effects, the negative lead strength of manganese dry batteries can also remove lead. Has been said to be extremely difficult.
- lead is one of the environmental pollutants, it is desired to provide a negative electrode zinc material that does not contain lead, and development is underway (JP-A-6-196156). reference).
- a conventional molten bismuth-added zinc alloy is poured into a bowl shape, naturally cooled to form an ingot, then rolled to a predetermined thickness by a rolling mill, and a manganese dry battery negative electrode zinc material is formed by a pressing machine.
- a manufacturing method there were problems such as slow cooling and poor productivity, cracks around the zinc plate, and defective products.
- the current lead-added zinc pellets have a continuous forging and rolling method, so the productivity is extremely poor compared to that, which is disadvantageous in terms of cost.
- Patent Document 1 JP-A-6-196156
- Patent Document 2 JP-A-7-45272
- the present invention was made to solve the problems in the method for producing a lead-free zinc alloy negative electrode zinc material for manganese dry batteries, and uses a zinc alloy containing no lead.
- the object of the present invention is to provide a method for producing a zinc alloy sheet material which has good corrosion resistance and does not generate cracks, cracks or breaks in the forging and rolling processes. Means for solving the problem
- the first aspect of the present invention is a molten zinc obtained by melting a material composed of zinc, bismuth in an amount of 0.1% by mass or more and 0.7% by mass or less, and other elements in an inevitable impurity amount in a melting furnace.
- An alloy adjusting step for preparing an alloy a forging step in which a molten zinc alloy prepared by the alloy adjusting step is forged by a forging machine and formed into a band-shaped formed body, and a rolling for rolling the obtained band-shaped formed body
- a method for producing a manganese dry battery lead-free zinc material comprising at least a step and a pressing step of punching the obtained plate material into a predetermined shape such as a circle or a hexagon by a press.
- the zinc alloy is poured into a bowl shape, naturally cooled to form an ingot, then rolled to a predetermined thickness by a rolling mill, and the manganese dry battery negative electrode zinc material is formed by a press. It is a manufacturing method.
- This method creates an ingot, cools with water from the periphery of the saddle before rolling, and quenches to refine the crystals and prevent cracking of the zinc plate during rolling.
- Productivity can be improved by preparing and continuously cooling. Even in this case, rolling is not performed twice, and it is desirable to perform rolling gradually in six times.
- FIG. 1 is a schematic diagram of a manufacturing apparatus used in the first embodiment.
- FIG. 2 is a schematic diagram of a manufacturing apparatus used in the second embodiment.
- FIG. 3 is a schematic cross-sectional view of a manganese dry battery to which the present invention can be applied.
- FIG. 4 is a schematic sectional view of a manganese dry battery to which the present invention can be applied.
- FIG.5 Cross-sectional metallographic structure of a zinc band-shaped compact containing acicular crystals cut perpendicular to the longitudinal direction
- FIG. 6 Photograph of a cross-sectional metallographic structure of a zinc band-shaped compact that contains almost no acicular crystals, cut perpendicular to the longitudinal direction.
- FIG. 7 Enlarged view of the main parts of the manufacturing equipment shown in Fig. 1.
- FIG. 1 is a schematic view of the production apparatus.
- the manufacturing method of the present embodiment includes an alloy adjustment step of preparing a zinc alloy using a melting furnace, a forging step of forging with a forging machine and forming into a strip-shaped body, and the strip-shaped body from the above steps.
- a zinc alloy sheet rolled to a predetermined thickness with a rolling process that is rolled on a rolling mill and then punched into a predetermined shape such as a circle, hexagon, or rectangle with four corners chamfered by a press. As shown in FIG.
- FIG. 1 is a manufacturing apparatus suitable for use in the present invention
- FIG. 7 is an enlarged view of a main part in the vicinity of the zinc alloy molten metal forging part of the manufacturing apparatus of FIG.
- the zinc alloy molten metal forging part of this apparatus comprises a zinc alloy melting furnace 11, a molten zinc alloy outlet 12 for taking out the molten metal from the zinc alloy melting furnace 11, and this molten zinc alloy outlet 12
- a mold 13 is provided for supplying the molten zinc alloy flowing out from the groove 14c formed on the outer periphery of the rotatable disc-like disk 14. As shown in FIG.
- the mold 13 is composed of flow path forming members 13a and 13b called side dams and a bottom portion (not shown), and the outer circumferential groove portion in which the side dam and the bottom portion are formed in the disk-shaped disk 14.
- 14c and the groove side wall 14d forming the groove are arranged in sliding contact with each other, and the molten zinc alloy is supplied to the groove 14c of the disk-shaped disc 13 for production.
- the temperature control is important, and although not shown, it is preferable to control the temperature by arranging a heating device, a cooling device and a temperature measuring device.
- a heat-resistant belt 16 is disposed on the outer periphery of the disk-shaped disk 14 so as to be in contact with the groove 14c, and melts in the space formed by the groove 14c of the disk-shaped disk 13 and the heat-resistant belt 16.
- the zinc alloy is cooled to form a band-shaped compact 17.
- the strip-shaped body 17 is then rolled to a predetermined thickness by one or a plurality of rolling rolls 19 and punched into a desired shape by the punch device 21.
- bismuth is added to pure zinc and melted in a melting furnace 11 to prepare a zinc alloy.
- the amount of bismuth added to zinc is 0.1 to 0.7% by mass of the alloy composition.
- the amount of magnesium added is preferably in the range of 0.0005 mass% or more and 0.05 mass% or less with respect to the alloy composition.
- the negative electrode zinc plate for 6F22 which is a prismatic laminated battery defined by JIS
- the negative electrode zinc material of cylindrical manganese dry batteries and the crystals during fabrication can be refined.
- the manufacturing method of the negative electrode zinc material for dry batteries is improved. That is, by adding magnesium to the zinc alloy, crystallization is suppressed and the crystal grains are reduced, and it is possible to prevent the band-shaped formed body from being broken at the outlet of the forging machine and cracking during compression. In that respect, the larger the amount of magnesium added, the better. However, if the amount is too large, the Vickers hardness of zinc becomes too high, and the can-making ability deteriorates.
- the addition of lead to the zinc alloy exerts a favorable function for formability, so it is completely supported.
- the amount of lead is small in consideration of environmental problems.
- the zinc alloy contains lead in an amount of inevitable impurities.
- other elements such as Fe, Cu, Cd, Sn, and Al may be contained in amounts of inevitable impurities.
- the molten zinc alloy is fed into the mold 13 through the take-out port 12 of the melting furnace 11 and formed into a strip shape by a rotating forging machine.
- This forging machine is provided with a disk-shaped disk 14, which is a roll-shaped rotating member capable of water cooling, and has a groove (not shown) formed on the outer peripheral surface thereof.
- rolls 15a, 15b, and 15c are provided in contact with a part of the disk-shaped disc, and a belt 16 having heat resistance such as a steel belt is stretched around these rolls.
- the belt 16 moves at the same speed in the same direction as the disk-shaped disk 14 to form a space in cooperation with a groove formed on the outer periphery of the disk-shaped disk 14, and the melt is contained therein.
- Zinc alloy is filled and cooled to form a band-shaped compact 17.
- the temperature of the molten zinc alloy supplied from the outlet 12 of the melting furnace 11 to the disc-like disk 14 is preferably in the range of 400 ° C to 600 ° C. When this temperature is out of the above range, the obtained band-shaped molded product is easily broken.
- the disc-like disk 14 supplied with the molten zinc alloy is rapidly cooled in order to refine the crystal.
- the rapid cooling of the disk-shaped disk 14 can be performed by water cooling. That is, a water-cooled water supply is provided inside the disc-shaped disk 14, and water at a temperature of 40 ° C or less is sent to the inside at a water pressure of about 0.2 MPa for cooling.
- the thickness of the band-shaped formed body is determined by the depth of the groove formed on the outer periphery of the disc-like disk 14.
- the thickness of the band-shaped molded body is preferably as thin as possible because it is less likely to break and is easy to handle.
- the finally obtained zinc material for negative electrode is restricted and defined by the electric capacity and mechanical strength of the battery obtained by this, its thinness is limited.
- Strip shaped When the thickness is reduced, the compression ratio is reduced in the rolling process. In this case, there is a possibility that the quality of the plate material obtained by the compression cannot be maintained, such as the disappearance of the cavity inside the plate material by the compression. In this way, the thickness of the strip shaped body is set by the thickness and compression rate of the zinc pellet or zinc plate of the final product.
- the diameter of the disk-shaped disk 14 is preferably set to 200 cm or more. Further, when the thickness of the belt-shaped molded body is in the range of 1 mm or more and 30 mm or less, the diameter of the disk-shaped disk 14 is preferably in the range of 20 to 200 cm.
- the band-shaped molded body 17 tends to be broken near the exit of the forging machine due to the curvature, and many cracks are generated on the surface of the band-shaped molded body 17, and the negative electrode zinc The production yield of materials decreased, and it was not economical.
- the diameter of the disk-shaped forming drum is larger than the above range, the cooling time becomes longer, the cooling speed needs to be lowered, and there is a problem that the control range for setting the temperature condition of the forging machine becomes smaller.
- the needle-like crystal of the zinc alloy extends in a direction perpendicular to the longitudinal direction of the band-shaped body.
- the belt-shaped compact is cooled by the upper and lower surface forces, but the cooling of the central part of the plate tends to be delayed, and the acicular crystal seems to grow.
- the band-shaped formed body is likely to be broken, and is liable to be cracked even in the later rolling process.
- FIG. 5 and FIG. 6 are obtained by cutting the zinc band-shaped compact perpendicularly to the longitudinal direction, and the structure of Fig. 5 is a cross section of the zinc band-shaped compact having acicular crystals, and the structure of Fig. 6 is acicular. It is a cross section of a zinc band shaped product having a crystal structure substantially free of crystals. As shown in Fig. 5, these crystals include not only the complete crystal structure but also the uniaxial anisotropy crystal structure and the imperfect force structure.
- the cross section of the zinc plate or the zinc strip is a surface obtained by cutting or polishing the zinc plate or the zinc strip in an arbitrary direction, and the observation surface has an average crystal structure of the cross section. This is an observation of the crystals in the region.
- the strip-shaped molded body 17 obtained by the above process is conveyed by a guide roll 18 to a rolling apparatus in the next process.
- the rolling device is composed of at least two pairs of twin rolls 19 la, b, 19 2a, b, and an appropriate amount of reduction is performed to form the zinc alloy sheet 20.
- the thickness of this zinc alloy sheet varies depending on the type and size of the dry cell, and is usually set in the range of 4 to 7 mm for zinc pellets for zinc cans.
- the temperature of the strip-shaped formed body before rolling is preferably in the range of 100 to 190 ° C. By setting the temperature condition within this range, it is possible to prevent cracking and cracking at the side end of the band-shaped molded body.
- the compression ratio (the thickness of the rolled plate material Z the thickness of the plate material before being rolled) is preferably in the range of 30% or more. If the compressive force falls below this range, voids and other cavities that exist inside the strip shaped structure remain after the rolling process, and it is not possible to improve the pellet quality. Compared to the current alloy composition containing lead, this alloy composition is prone to cracks and cracks on the side edges, and it is inconvenient because the structure of the plate material deteriorates if it is compressed at once. Is likely to occur. In order to avoid this, it is preferable to divide the rolling into two or more times to reduce the rolling reduction per rolling. Moreover, it is preferable to perform the rolling by dividing it within 6 times. If rolling is performed 6 times or more, the surface temperature of the rolling of the final stage decreases and cracks are promoted. It is not preferable.
- the zinc alloy plate material 20 obtained by the above process is punched into a required shape such as a rectangle, a disk shape, or a hexagonal shape with chamfered corners by a pressing device 21.
- the punched negative electrode zinc material is used as a negative electrode zinc plate for 6F22, or as a zinc pellet for a cylindrical manganese dry battery, and then deep drawn and molded into a bottomed cylindrical container for use.
- the obtained negative electrode zinc plate for 6F22 and a bottomed cylindrical container can be used to assemble a battery in combination with members such as a positive electrode, a negative electrode, and a current collector according to a conventional method.
- a conventionally well-known apparatus can be used for this press apparatus.
- this molding apparatus is fitted to a base, a die that is a female die fixed to the base for punching a strip-shaped molded body into a predetermined shape such as a circle or a hexagon, and an internal recess of the die.
- the tap is a male mold, and a drive device that drives the tap so as to be able to feed and retract.
- a zinc alloy plate material such as a zinc alloy cover is disposed in the gap between the die and the tap, and is punched by driving the tap.
- dies and taps can be exchanged, and a combination of dies and taps suitable for the shape to be molded can be selected and used.
- this embodiment is a manufacturing method in which the forging process and the rolling process or pressing process of the zinc plate material are separated in one or several processes.
- FIG. 2 shows a schematic diagram of the manufacturing equipment used in the forging and rolling processes.
- the same members as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
- the zinc alloy adjusted in the melting furnace 11 is formed into a strip-shaped formed body by a forging device, and this is formed into a required thickness by a rolling device 19-la, b, 19-2a, b.
- the sheet material 20 is rolled and formed.
- the plate 20 thus formed is wound up into a roll until it has a predetermined diameter.
- the wound zinc alloy sheet material roll 22 is rewound and is pressed by a press machine (not shown). Punching is performed to produce negative electrode container pellets.
- the zinc plate obtained through the forging process and rolling process can be cut to a predetermined size and supplied to the pressing process.
- the separation is performed at the forging, rolling process, pressing process force, or several places, the degree of freedom of the manufacturing process is improved and workability is improved.
- the same conditions as in the first embodiment can be adopted as conditions such as the temperature in the manufacturing process of the plate material.
- the zinc alloy is poured into a mold (mold) to form a plate-like formed body, and then applied to a rolling mill, rolled to a predetermined thickness, and then pressed into a manganese dry battery negative electrode zinc material by a pressing machine. Is a manufacturing method.
- the production equipment shown in FIG. 2 is equipped with a forging machine having a disc-shaped disk having a diameter of 100 cm, in which 100 kg of pure zinc is added with the additive components so as to form the alloy shown in Table 1 to prepare a zinc alloy.
- a zinc plate material was manufactured under the following conditions.
- Cooling water temperature 32 ° C
- an R20 manganese dry battery shown in Fig. 3 was prepared using the zinc pellets, and prototype evaluation was performed. First, acetylene black as a conductive agent is weighed and mixed in a positive electrode active material containing manganese dioxide as a main component. This is sprayed with an electrolytic solution and wet-mixed in a wet state to form a positive electrode mixture powder.
- a cylindrical separator and dish-shaped bottom insulating paper are inserted into the inner wall of the negative electrode container formed by the above method, and the molded positive electrode mixture is inserted therein.
- the mixture pressure brim paper is placed on the upper surface of the positive electrode mixture, and pressed so that the zinc can, the separator, and the positive electrode mixture are in close contact with each other.
- a carbon rod serving as a positive electrode current collector rod is inserted into the center of the positive electrode mixture under pressure, and the separator is moistened with the electrolyte that has been leached as much as possible.
- the battery thus produced was stored in a constant temperature room at 20 ° C ⁇ 2 ° C for 10 days, then stored in a constant temperature bath at 45 ° C for 30 days, and then stored in a constant temperature room at 20 ° C and 2 ° C.
- ⁇ A discharge of 4 hours a day was performed, the life performance at 0.9V was evaluated, and the relative value was determined with the conventional performance set to 100.
- the number of evaluation batteries is nine.
- a 10 cm 2 zinc can made by extrusion molding was cut into a sample for corrosion test (thickness 0.3 mm, width 10. Omm, length 50. Omm), and the sample surface was # 400, 600, 800, 1000, 1200 Polished with a sandpaper until the mirror surface was obtained, and degreased in an ultrasonic cleaner. 10 mass for degreasing liquid % NaOH was used. The degreased sample was weighed to the order of 0.1 mg and immersed in a battery electrolyte prepared in advance. A thermostatic water bath was prepared, and the weight loss of the sample after 66 hours at 45 ° C was regarded as the weight loss of corrosion.
- the electrolyte used in the test is a standard battery solution for atomic absorption spectrophotometers, which is a standard battery electrolyte for 25% by weight of zinc chloride and 2.0% by weight of ammonium chloride.
- Ni, Co, A certain amount of Cu was added to the electrolyte as an external standard, and the concentrations of Ni, Co and Cu in the electrolyte were adjusted to 2.9 ppm, 0.40 ppm and 0.86 ppm.
- Ar was used for 10 minutes for publishing and the test solution was used. The average corrosion weight loss value was obtained for 6 samples. The results are also shown in Table 1.
- the zinc pellets produced by this production method have good corrosion resistance and good life performance, so that they can be used in batteries. Further, in the test examples of the present invention, no cracks were observed, and it became clear that excellent can-making processability was exhibited.
- Zinc plate thickness at the forging machine exit 15mm
- Cooling water temperature 32 ° C
- Impossible There are many cracks that are deeply cracked to the pellet punching position and cannot be used as pellets.
- Zinc plate thickness at the forging machine exit 15mm
- Cooling water temperature 32 ° C
- the temperature of the molten zinc alloy in the mold is more preferable, and the optimum value is 400-6.
- Zinc plate thickness at the forging machine exit 15mm
- Zinc plate thickness at the forging machine exit 15mm
- a zinc alloy in which 0.3% by mass of bismuth was added to 100 kg of pure zinc was prepared.
- the disk-shaped disk diameter of the forging machine was changed variously, and the conditions listed in Table 6 below were applied. After manufacturing the band-shaped body, the appearance and crystal structure of the band-shaped body and the zinc plate obtained in the rolling process were observed.
- the strip-shaped molded body after forging is thin, it is flexible and difficult to break, but it is necessary to take a compression ratio of at least 30% in the rolling process, which is limited by the thickness of the zinc pellet of the product. If it is thick, it may break near the exit of the forging machine, so the disk diameter of the forging machine is increased, and it is cooled and pulled out from the disk in a semi-solid state, so that it does not bend significantly during the process of flattening. Is effective.
- Rolling machine zinc plate temperature 110 ° C Number of twin rolls: 2 sets
- the disk-shaped disk diameter of the forging machine was changed within the range of 18 cm to 220 cm, and the thickness of the belt-shaped development body was changed from lmm to Table 6 shows the results of manufacturing and comparing zinc plates under the conditions described in Table 6 below.
- the strip-shaped body taken out from the forging machine is 30 mm
- the strip-shaped body does not fold when the forging machine disk diameter is 220 cm, but the small-diameter disk such as 18 cm does not occur.
- the molded product was easily broken, and many cracks were generated around the rolled zinc plate. Since this is thick, the core is thought to promote acicular crystallization by being gradually cooled without being cooled.
- Forging machine exit Forging machine die Forging machine exit Forging machine exit Rolled zinc strip diameter (c strip shaped body Zinc plate cracking Form thickness ( m m) Breakage rate Crystallized state (needle state (excellent) , Good, m) (%) Crystal generation rate) Yes, No)
- a zinc alloy in which 0.3% by mass of bismuth was added to 100 kg of pure zinc was prepared, and an experiment was conducted using the production apparatus shown in FIG. 2 under the following conditions.
- the average grain size of the cross-section of the obtained rolled zinc plate, the area ratio of crystals of 200 m or more, and the cracked state of the rolled zinc plate Considered the relationship.
- the results are shown in Table 7 below.
- the crystal grain size was calculated with a microscope magnification of 100, an actual field of view of 25 mm x 25 mm, and the size of the projection or photographic print was 10 mm x 10 mm.
- Crystal here
- the metal structure part used for the measurement of the particle size was an average part representing the structure, and the part was free from distortion and slippage of the crystal.
- the band-shaped band is formed under the condition that the ratio of the acicular crystals exceeds the area ratio of the cross-sectional area by 10% in the cross-section of the band-shaped molded body formed into a band with a predetermined thickness by the forging machine
- the molded body was very broken and could not be stably and continuously forged.
- the rolling condition is such that the average grain size is 75 m or more in the cross section of the rolled zinc alloy sheet due to the rolling process to a predetermined thickness, large cracks are generated around the sheet. As a result, the yield was extremely deteriorated, resulting in deterioration of manufacturing efficiency and the inclusion of defective products with cracks.
- the average particle diameter of the zinc alloy crystal is 75 m or less. In any cross section of the zinc alloy sheet, it exceeds 200 / zm. It has become apparent that the total cross-sectional area of the zinc alloy crystal having a grain size is preferably 10% or less with respect to the cross-sectional area of an arbitrary cross section of the zinc alloy sheet.
- Cooling water Roller sub-forging machine outlet sub-rolled zinc plate Rolled zinc Lead plate input Average crack in the cross-section of the crystalline shape of the lead plate
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Abstract
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05751594.2A EP1808917B1 (en) | 2004-10-15 | 2005-06-06 | Method for producing manganese dry cell negative electrode zinc material |
KR1020077010012A KR100929283B1 (ko) | 2004-10-15 | 2005-06-06 | 망간 건전지 음극 아연재료의 제조방법 |
JP2006540827A JP5072363B2 (ja) | 2004-10-15 | 2005-06-06 | マンガン乾電池負極亜鉛材料の製造方法 |
US11/577,267 US7874346B2 (en) | 2004-10-15 | 2005-06-06 | Method for producing manganese dry cell negative electrode zinc material |
HK08104508.9A HK1110152A1 (en) | 2004-10-15 | 2008-04-23 | Method for producing manganese dry cell negative electrode zinc material |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004-301215 | 2004-10-15 | ||
JP2004301215 | 2004-10-15 |
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WO2006040857A1 true WO2006040857A1 (ja) | 2006-04-20 |
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PCT/JP2005/010378 WO2006040857A1 (ja) | 2004-10-15 | 2005-06-06 | マンガン乾電池負極亜鉛材料の製造方法 |
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US (1) | US7874346B2 (ja) |
EP (1) | EP1808917B1 (ja) |
JP (1) | JP5072363B2 (ja) |
KR (1) | KR100929283B1 (ja) |
CN (1) | CN100530775C (ja) |
HK (1) | HK1110152A1 (ja) |
PL (1) | PL1808917T3 (ja) |
WO (1) | WO2006040857A1 (ja) |
Cited By (2)
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KR101500643B1 (ko) * | 2007-05-10 | 2015-03-10 | 재단법인 포항산업과학연구원 | 연속 성형 장치 및 연속 성형 방법 |
WO2020071350A1 (ja) * | 2018-10-03 | 2020-04-09 | 三井金属鉱業株式会社 | 亜鉛箔、これを用いた一次電池用負極活物質材料及び亜鉛箔の製造方法 |
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JP5091408B2 (ja) * | 2003-11-07 | 2012-12-05 | 東芝ホームアプライアンス株式会社 | 電池用負極活物質材料、電池用負極缶、電池用負極亜鉛板、マンガン乾電池、及びその製造方法 |
JP5091409B2 (ja) * | 2003-12-25 | 2012-12-05 | 東芝ホームアプライアンス株式会社 | 電池用負極缶、およびこれを用いたマンガン乾電池 |
CN101383410A (zh) * | 2003-12-25 | 2009-03-11 | 东芝电池株式会社 | 锰干电池 |
CN103480811B (zh) * | 2013-10-12 | 2015-07-01 | 武汉钢铁(集团)公司 | 急冷制带的设备及工艺 |
EP3624963B1 (de) | 2017-05-19 | 2021-08-25 | IQ Power Licensing AG | Vorrichtung zum giessen von elektrodenträgern für blei-säure-batterien |
CN110756778A (zh) * | 2019-11-04 | 2020-02-07 | 武汉深蓝自动化设备股份有限公司 | 一种铅酸蓄电池板栅连续铸造装置 |
EP4130313A4 (en) | 2020-03-27 | 2023-09-27 | Mitsui Mining & Smelting Co., Ltd. | ZINC SHEET, ACTIVE MATERIAL FOR BATTERY NEGATIVE ELECTRODE USING SUCH SHEET AND METHOD FOR PRODUCING ZINC SHEET |
CN112371847A (zh) * | 2020-10-23 | 2021-02-19 | 昆山智盛精密铸造有限公司 | 一种高散热性合金笔记本电脑壳体成型模具及生产方法 |
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-
2005
- 2005-06-06 CN CNB2005800429302A patent/CN100530775C/zh active Active
- 2005-06-06 US US11/577,267 patent/US7874346B2/en not_active Expired - Fee Related
- 2005-06-06 JP JP2006540827A patent/JP5072363B2/ja not_active Expired - Fee Related
- 2005-06-06 PL PL05751594.2T patent/PL1808917T3/pl unknown
- 2005-06-06 WO PCT/JP2005/010378 patent/WO2006040857A1/ja active Application Filing
- 2005-06-06 EP EP05751594.2A patent/EP1808917B1/en active Active
- 2005-06-06 KR KR1020077010012A patent/KR100929283B1/ko active IP Right Grant
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JPH07296813A (ja) | 1994-04-27 | 1995-11-10 | Fuji Elelctrochem Co Ltd | 電池の負極亜鉛缶 |
JP2000058045A (ja) * | 1998-08-10 | 2000-02-25 | Toshiba Battery Co Ltd | マンガン乾電池 |
WO2000077868A1 (en) | 1999-06-11 | 2000-12-21 | Ever Ready Limited | Method of preparing zinc alloy foil |
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KR101500643B1 (ko) * | 2007-05-10 | 2015-03-10 | 재단법인 포항산업과학연구원 | 연속 성형 장치 및 연속 성형 방법 |
WO2020071350A1 (ja) * | 2018-10-03 | 2020-04-09 | 三井金属鉱業株式会社 | 亜鉛箔、これを用いた一次電池用負極活物質材料及び亜鉛箔の製造方法 |
US11848441B2 (en) | 2018-10-03 | 2023-12-19 | Mitsui Mining & Smelting Co., Ltd. | Zinc foil, primary battery negative electrode active material using same, and zinc foil production method |
Also Published As
Publication number | Publication date |
---|---|
HK1110152A1 (en) | 2008-07-04 |
EP1808917A4 (en) | 2008-01-16 |
US20080029189A1 (en) | 2008-02-07 |
KR20070083911A (ko) | 2007-08-24 |
KR100929283B1 (ko) | 2009-11-27 |
EP1808917B1 (en) | 2016-03-30 |
EP1808917A1 (en) | 2007-07-18 |
CN101080829A (zh) | 2007-11-28 |
PL1808917T3 (pl) | 2016-09-30 |
JP5072363B2 (ja) | 2012-11-14 |
JPWO2006040857A1 (ja) | 2008-05-15 |
US7874346B2 (en) | 2011-01-25 |
CN100530775C (zh) | 2009-08-19 |
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