• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention provides an aluminum negative electrode base plate having a dielectric insert at the upper edge portion near the solution line of the electrolytic cell when the aluminum negative electrode base plate is placed in the electrolytic cell for zinc electrodeposition. The dielectric insert has a flat surface that rises or protrudes above the surface of the aluminum negative electrode base plate by a distance of 0.5 mm to 1.5 mm on both sides of the aluminum negative electrode base plate. In this manner, if the peeling knife penetrates between the zinc sheet and the aluminum cathode base plate after stripping the electrodeposited zinc sheet, it does not strike the vertical interface between the dielectric insert and the aluminum cathode base plate. Will not damage. This will prevent the rapid deterioration of the aluminum negative electrode base plate and significantly extend the life of the aluminum negative electrode base plate.
    公开号:KR19990062917A
    申请号:KR1019980053869
    申请日:1998-12-09
    公开日:1999-07-26
    发明作者:마크 제이 보이손니얼트；가스톤 에이 기라드；존 로버트 맥린
    申请人:이. 앤쏘니 세쓰；팔콘브리지 리미티드；
    IPC主号:
    专利说明:

    Aluminum Cathode Base Plate with Dielectric Material Insert
    The present invention relates to an aluminum negative electrode base plate which is used for electrodepositing a zinc sheet and strips the zinc sheet deposited continuously, in particular an aluminum negative electrode provided with a dielectric material or an insulating material insert at the edge of the base plate near the solution line of the electrolytic cell. It is about a base plate.
    Aluminum negative electrode base plates with dielectric material inserts are already known in the art so that the blade of the peeling knife first strikes the dielectric surface and then penetrates between the zinc sheet and the negative electrode base plate to peel off the zinc sheet from the negative electrode base plate. This technique is a method and apparatus for automatically peeling a zinc sheet from an aluminum cathode base plate, filed on June 11, 1996 by the Applicant (Method and Apparatus for Automated Stripping of Zinc Sheets from Aluminum Cathode Base Plates). Canadian Patent Application No. 2,178,776.
    This prior art base plate uses a dielectric insert or insulating insert having essentially the same height as the surface of the adjacent base plate, which is disclosed in Canadian Patent No. 1,169,025 issued June 12, 1984.
    It is an object of the present invention to provide an improved aluminum cathode base plate in which the surface of the dielectric material insert is raised relative to the surface of the adjacent base plate.
    Another object of the present invention is to provide an insert having a protrusion of any shape, in particular in the region where the blade penetrates between the zinc sheet and the negative electrode base plate.
    1 is a plan view of the edge portion of the aluminum negative electrode base plate according to the embodiment of the present invention.
    2 is a cross-sectional view taken along the line A-A of FIG.
    Figure 3 is a plan view of the edge portion of the aluminum negative electrode base plate according to another embodiment of the present invention.
    4 is a sectional view taken along the line D-D of FIG.
    5 is a schematic view of a peeling apparatus for automatically peeling off a zinc sheet from a base plate of the present invention.
    Explanation of symbols on the main parts of the drawings
    12 aluminum cathode base plate 14 dielectric insert
    18 hole 20 edge portion of dielectric insert
    24: support bar 26: framework
    28: peeling device 30: peeling knife
    32: pivot 34: arm
    36: U type container
    In a conventional aluminum cathode base plate where the dielectric insert has the same height as the base plate, the base plate has a lifespan of less than 200 strips and is used for about 12 to 13 months. Thus, these base plates should be replaced approximately every year, costing approximately $ 1 million or more, depending on the size of the zinc plant. It has been found that breakage of the aluminum negative base plate at the same height as the dielectric insert is caused by the gap in the interface between the insert and the adjacent aluminum surface. The interface here is perpendicular to the surface of the base plate. When the base plate with the insert of the same height is peeled off by the peeling device, the blade runs across the interface and pushes the aluminum plate back, causing the interface to be greatly opened. The zinc is electrodeposited at the interface after the peeling process, and if the zinc is subsequently peeled off, the interface is further damaged, eventually making the interface too wide, which hinders the peeling knife from peeling the electrodeposited zinc. Therefore, the negative electrode base plate must be removed in advance because it can be peeled off by the automatic peeling device.
    Applicant has surprisingly found that the above problem can be easily solved by raising the height of the dielectric insert slightly above the aluminum cathode base plate. That is, the blade still penetrates between the negative base plate and the zinc sheet but will not strike the vertical negative base plate-dielectric insert interface. The protrusion of the flat surface of the dielectric insert is generally 0.5 to 1.5 mm, most preferably about 0.8 mm over the surface of the aluminum base plate. Although the entire insertion surface is raised to simplify the installation of the dielectric insert, it is sufficient to raise only the area where the blade penetrates between the cathode base plate and the zinc sheet, while the remainder of the insert will be essentially flush with the cathode plate. It may be.
    Although any type of dielectric insert can be used in connection with the present invention, it has been found that teardrop shaped inserts are particularly advantageous. The region where the insert extends furthest into the base plate corresponds to the point where the blade penetrates between the base plate and the zinc sheet to strip the zinc sheet, and at least such region is formed to protrude above the surface of the aluminum cathode as described above. .
    Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
    In all drawings, the same reference numerals are used for the same elements.
    A portion 10 of the aluminum negative electrode base plate shown in FIGS. 1 and 3 is a portion 10 of the aluminum negative electrode base plate 12 shown in FIG. 5. According to one embodiment of the invention, the upper edge of the base plate 12 is equipped with a dielectric insert 14 in the form of a teardrop. Although this is the preferred form of the dielectric insert, other suitable forms may be used.
    As shown in FIG. 2, an insert 14 is mounted on the base plate 12, wherein the insert is mounted to protrude beyond the surface of the plate 12 by the length shown by arrow CC, The length is 0.8 mm. The dielectric material may be a vinyl ester polymer or polyester such as an epoxy-based vinyl ester to which elastomer is added, but other dielectric resin materials having a suitable form may be used. Preferably, the dielectric resin material is used as an inert filler such as a silicone based filler. The projection CC is provided in the region B in FIG. 1, in which the peeling knife shown by the break line 30 is deposited on the aluminum negative electrode base plate 12 by electrolysis. It is an area where the price is taken to remove the sheet. During the electrodeposition process, both sides of the base plate 12 are coated with zinc except for the portion 14 covered with the dielectric material, and the side strip 16 is also made of a suitable dielectric material, as is known in the art. Likewise, it is fixed on each edge of the negative plate to prevent zinc from depositing on the edges, which makes automatic peeling impossible.
    Dielectric insert 14 is installed on base plate 12 by any method. One method is to machine the desired area of the base plate to a thin thickness, and then cover the processed area with dielectric material using resin transfer molding or compression molding. If the dielectric material is well secured, one or more holes 18 may be formed in the thin lower region, which interconnects the dielectric material from both sides. If the dielectric material is well mounted and secured and has the desired protrusion as indicated by the arrow CC of FIG. 2 in the area B shown in FIG. Not so important. Also, as shown in FIG. 2, the edge 20 of the raised portion may be shaved at an angle of 45 °.
    3 and 4 illustrate another embodiment of base plate 12 having dielectric insert 14. Here, the upper edge portion of the base plate 12 is cut along the break line 15. The thin lower fragment of the base plate 12 is then formed into a strip 17 running between the break line 15 and the edge portion 20 of the rise. A plurality of holes 18 are formed in this strip 17 through which the dielectric material is connected to the base plate 17 only in the region of the strip 17, while the remaining portion of the insert 14 is formed. Form a solid dielectric insert. This is particularly illustrated in FIG. 4, which is a cross sectional view taken along the line D-D in FIG. 3, wherein the projection C-C is the same as that shown in FIG.
    FIG. 5 shows the automatic peeling device disclosed in Applicant's own Canadian Patent Application No. 2,178,776, where a plurality of aluminum negative electrode base plates 12 are deposited with zinc sheets deposited on each side of the support bars 24. Suspended in parallel in the framework 26, and then the base plate 12 is in turn by a peeling device 28 having a peeling knife 30 that rotates about the pivot 32 in a predetermined order. Peel off automatically. During the peeling process, the negative electrode base plate 12 is maintained in a straight position with the aid of the arm 34 descending simultaneously with the peeling device 28. Once the zinc sheet is peeled off, the peeled zinc sheet falls into the U-shaped container 36, which has a conveyor at its bottom that carries the sheet peeled off from the peeling device. The region 10 of the aluminum cathode base plate 12 shown in FIG. 5 is the subject of the present invention. If the dielectric insert 14 uses a standard base plate having the same height as the negative base plate 12, and the stripping device as described above is operated, the peeling of less than 200 before the negative base plate 12 is replaced. The cycle can be achieved. On the other hand, in the case of using the same device on the negative electrode base plate of the present invention, where the 0.8 mm dielectric insert 14 protrudes over the surface of the negative electrode base plate 12, the negative electrode is still achieved after at least 360 peeling cycles have been achieved for 25 months. The base plate 12 can be used. In the accelerated erosion test, it was found that the negative electrode base plate 12 could withstand about 500 peeling cycles before the surface of the dielectric insert was abraded to the same height as the negative electrode base plate. Thus, the lifetime of the negative electrode base plate of the present invention may have a life of more than twice as long as the negative electrode base plate whose surface is the same height as the dielectric insert. This is a significant advance in the prior art.
    The present invention described above provides a dielectric material insert having a protrusion of a predetermined shape in an area where the peeling blade penetrates between the zinc sheet and the negative electrode base plate to be raised relative to the surface of the adjacent base plate, whereby the peeling blade is made of the aluminum negative electrode base. By not hitting the interface between the plate and the dielectric insert, the life of the aluminum negative electrode base plate can be significantly extended.
    权利要求:
    Claims (7)
    [1" claim-type="Currently amended] An aluminum negative electrode base plate having a dielectric insert at an upper edge portion near a solution line of the electrolytic cell when placed in an electrolytic cell,
    The dielectric insert passes through the surface of the aluminum negative electrode base plate such that a peeling knife penetrates between the aluminum negative electrode base plate and the zinc sheet electrodeposited thereon without hitting a vertical interface between the aluminum negative electrode base plate and the dielectric insert. It has a flat surface that rises up,
    And the dielectric insert is raised at least in the region that strikes the dielectric insert before the peeling knife passes between the aluminum cathode base plate and the zinc sheet electrodeposited thereon.
    [2" claim-type="Currently amended] The aluminum negative electrode base plate of claim 1, wherein a distance from which the surface of the dielectric insert projects beyond each side of the aluminum negative electrode base plate is about 0.5 mm to 1.5 mm.
    [3" claim-type="Currently amended] The aluminum cathode base plate of claim 2 wherein the distance is about 0.8 mm.
    [4" claim-type="Currently amended] 4. The aluminum negative electrode base plate according to claim 1, 2, or 3, wherein the raised edge portion of the dielectric insert is shaved in a region where the raised edge portion meets the aluminum negative electrode base plate.
    [5" claim-type="Currently amended] The aluminum negative electrode base plate of claim 4 wherein the raised inserts are shaved at an angle of 45 °.
    [6" claim-type="Currently amended] 6. The method of any one of claims 1 to 5, wherein the raised dielectric insert that meets the aluminum negative electrode base plate is in the form of a tear drop, and in the region where the peeling knife protrudes farthest into the aluminum negative electrode base plate. An aluminum negative electrode base plate adapted to strike the dielectric insert.
    [7" claim-type="Currently amended] The aluminum negative electrode base plate according to any one of claims 1 to 6, wherein the dielectric insert is composed of an epoxy-based vinyl ester polymer.
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    同族专利:
    公开号 | 公开日
    BR9805334A|1999-12-14|
    CA2224790A1|1999-06-12|
    PT102224B|2000-06-30|
    ITRM980762A1|1999-06-14|
    AR017203A1|2001-08-22|
    ZA9811159B|1999-06-08|
    CA2224790C|2003-06-03|
    CN1146677C|2004-04-21|
    IT1302913B1|2000-10-10|
    CN1219612A|1999-06-16|
    KR100581466B1|2006-08-30|
    PT102224A|1999-06-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1997-12-12|Priority to CA2,224,790
    1997-12-12|Priority to CA 2224790
    1998-12-09|Application filed by 이. 앤쏘니 세쓰, 팔콘브리지 리미티드
    1999-07-26|Publication of KR19990062917A
    2006-08-30|Application granted
    2006-08-30|Publication of KR100581466B1
    优先权:
    申请号 | 申请日 | 专利标题
    CA2,224,790|1997-12-12|
    CA 2224790|CA2224790C|1997-12-12|1997-12-12|Aluminum cathode base plate with insert of dielectric material|
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