JP2011006728A - Edge part insulating member and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an edge part insulating member in which an insulating member body and an edge part covering member can be firmly connected, and the infiltration of an electrolytic solution into them is prevented, and which can be stably used in an electrolytic refining process over a long period of time, and to provide a method for producing the edge part insulating member.SOLUTION: The edge part insulating member 10 is fitted to the edge part of an electrode plate 1 used for an electrolytic refining process for metal, and includes: an insulating member body 11 which is formed into a bar shape and has a mounting groove 14 elongate in the longitudinal direction of the insulating member body 11; and an edge part covering member 12 arranged at the longitudinal-direction edge part of the insulating member body 11; wherein a part 16 to be engaged is formed on at least either the outer face in the edge part or the mounting groove 14, in the edge part covering member 12, while a melted resin material is fixed to the edge part so as to be integrally formed, and further, the edge part covering member 12 has an engagement part 17 formed in accordance with the shape of the part 16 to be engaged.

Description

  The present invention relates to an edge insulating member attached to an edge of an electrode plate used in an electrolytic refining process such as electrolytic refining or electrowinning of metal, and a method for manufacturing the edge insulating member.

  In general, in the electrolytic refining of metal, an electrode plate made of a metal such as stainless steel is used as a cathode, and it is placed in an electrolytic cell together with an anode made of a metal to be refined, immersed in an electrolytic solution, electrolyzed, and subjected to electrolysis. A method has been applied in which a metal is deposited on both surfaces and the plate-like purified product is obtained by peeling the metal.

  Conventionally, in the electrolytic refining of copper, for example, after performing electrolysis for a relatively short time using an electrode plate made of stainless steel as a cathode, a copper seed plate having a thickness of about 0.5 mm to 1.0 mm is obtained. A conventional method has been used in which electrolysis is performed again using the plate as a cathode, and copper is deposited on the surface of the seed plate.

  On the other hand, in recent years, a permanent cathode method has been introduced in which long-time electrolysis is performed using a stainless steel electrode plate as a cathode to directly obtain a copper plate having a thickness of about 8 mm to 10 mm. In the permanent cathode method, the thickness of the electrode plate can be secured and the suspension property (verticality) of the electrode plate can be improved compared to the case of using a conventional seed plate, so the distance between the cathode and the anode is shortened. Current density can be increased. As a result, productivity is greatly improved, and high-quality electrolytic copper with few impurities and no abnormal precipitation can be obtained.

  When the seed plate or copper plate as described above is electrodeposited on both surfaces of an electrode plate made of stainless steel or the like, it is necessary to peel off the electrodeposited metal. When copper is electrodeposited on the side edges) and the front and back side seed plates or the copper plates are connected to each other, it is difficult to peel off the seed plate and the copper plate. Therefore, an edge insulating member for preventing the electrodeposition of copper on the edge of the electrode plate is provided (for example, see Patent Documents 1 and 2). The edge insulating member is generally formed using a resin material such as engineering plastic.

  An edge strip (edge insulating member) shown in Patent Document 1 is arranged in a bar shape (insulating member main body) which is formed in a rod shape and extends in the vertical direction and has a U-shaped cross section, and a lower end portion of the channel member. And an end cap (end covering member). The channel member is provided with a groove along its longitudinal direction, and a side edge portion of a cathode plate (electrode plate) is fitted into the groove. That is, the channel member is mounted so as to cover the side edge of the cathode plate, so that copper is not electrodeposited on the side edge.

  The end cap is for preventing the lower end surface of the side edge portion accommodated in the groove of the channel member from being exposed to the electrolyte. That is, when the lower end surface is exposed to the electrolytic solution and copper is electrodeposited on this part, the seed plate and the copper plate electrodeposited on both the front and back surfaces of the cathode plate are difficult to peel off from the cathode plate and the quality of the product is lowered. Since the edge strip is broken, such an inconvenience is prevented by providing an end cap. The end cap is generally fixed to the channel member using ultrasonic bonding, solvent bonding, or the like.

Special table 2003-502511 JP 2007-2282 A

  However, when the end cap and the channel member are bonded using ultrasonic bonding, solvent bonding, or the like, the mutual bonding area cannot be sufficiently secured, and a gap may be formed on the bonding surface. During electrolysis, the electrolyte may enter the inside of the edge strip from this gap, and copper may be deposited, causing the edge strip to break. In addition, since the adhesive strength between the end cap and the channel member cannot be sufficiently secured, the adhesive surface peels off during repeated use, and the end cap may fall off the channel member.

  The present invention has been made in view of such circumstances, and it is possible to firmly connect the insulating member body and the end covering member, and to prevent the electrolyte from entering into these, An object of the present invention is to provide an edge insulating member that can be stably used for an electrolytic refining process for a long period of time and a method for manufacturing the edge insulating member.

In order to achieve the above object, the present invention proposes the following means.
That is, the present invention is an edge insulating member to be attached to an edge of an electrode plate used in a metal electrolytic refining process, which is a rod-shaped insulating member main body having a mounting groove extending along its longitudinal direction, An end covering member disposed at an end in the longitudinal direction of the insulating member main body, and an engaged portion is formed on at least one of the outer surface of the end and the mounting groove, and the end The part covering member is characterized in that the melted resin material is solidified and integrally formed at the end part, and has an engaging part formed corresponding to the shape of the engaged part.

  According to the edge insulating member according to the present invention, the end covering member is formed integrally with the molten resin material solidified at the end of the insulating member main body. That is, since the end covering member is integrally formed with the insulating member main body by injection molding or the like, there is no gap between them, and sufficient adhesion is secured and the bonding area is secured. Is secured.

  Therefore, it is possible to reliably prevent the electrolyte from entering between the insulating member main body and the end covering member. That is, conventionally, since the insulating member main body and the end covering member are bonded using ultrasonic bonding, solvent bonding, or the like, a gap is formed between the bonding surfaces, and the edge insulating member is formed from the gap. In some cases, the electrolyte infiltrated into the metal, and the metal was deposited inside, thereby damaging the edge insulating member. On the other hand, according to the present invention, since the gap is not generated, the infiltration of the electrolytic solution can be prevented, and the above-described damage is not caused.

  Also, since the joint area between the insulating member main body and the end covering member is sufficiently secured by the integral molding, the insulating member main body and the end covering member are firmly connected, and the joint strength between them is greatly increased. Has been enhanced. Further, at the time of the integral molding, the engaging portion is formed by solidifying the molten resin material corresponding to the shape of the engaged portion. Therefore, the engaged portion and the engaging portion are reliably engaged, and the joining area between the insulating member main body and the end covering member is further increased.

  With such a configuration, the edge insulating member has sufficient mechanical strength against an external force that relatively displaces the insulating member main body and the end covering member. Here, for the engagement between the engaged portion and the engaging portion, for example, a three-dimensional engagement such as an engagement by a concave portion and a convex portion or an engagement using surface roughness can be considered. The rigidity against the external force applied from various directions is enhanced as compared with a configuration in which the insulating member main body and the end covering member are simply two-dimensionally joined to each other in a plane.

  Furthermore, by forming these engaged parts and engaging parts, shrinkage (thermal deformation) due to cooling when the end covering member is solidified is also suppressed.

  Further, for example, in the electrolytic refining process of copper, a heat cycle in a copper sulfate solution can be considered. According to the edge insulating member of the present invention, the insulating member main body and the end portion are formed by the integral molding and engagement described above. Since the adhesiveness with the covering member is enhanced and the mechanical strength against thermal stress is ensured, the corrosion resistance and heat resistance are improved, and it can be used stably in the electrolytic refining process for a long time.

  In the edge insulating member according to the present invention, the engaged portion may be any one of a bottomed hole, a through hole, and a groove.

  According to the edge insulating member according to the present invention, since the engaged portion is formed in any of the bottomed hole, the through hole, and the groove, the engaged portion can be formed relatively easily. That is, for example, after the insulating member main body is formed by extrusion, the engaged portion can be easily formed by drilling or cutting the end portion of the insulating member main body.

  Further, since the engaged portion is formed in this way, when the end covering member is molded, the melted resin material is easily filled in the engaged portion, and the engaged portion is formed with high accuracy. Therefore, the engaged portion and the engaging portion can be engaged with each other relatively easily and stably.

  In the edge insulating member according to the present invention, a sealing film made of an elastic material is formed in the mounting groove, and the insulating member body and the sealing film are integrally formed by a two-color molding method. It is good to be.

  According to the edge insulating member according to the present invention, the edge of the electrode plate fitted in the mounting groove is in close contact with the sealing film made of an elastic material and is covered with the insulating member body. Therefore, the edge insulating member is stably supported by the electrode plate without being displaced or dropped with respect to the electrode plate, and the mounting groove is provided between the edge of the electrode plate and the seal film. It is possible to prevent the electrolyte from entering the inside.

  Furthermore, since the insulating member main body and the seal film are integrally formed by a two-color molding method, the electrolytic solution does not enter between the insulating member main body and the seal film. Accordingly, it is possible to more reliably prevent the metal from depositing inside the mounting groove and expanding the mounting groove, so that the edge insulating member is detached or displaced from the electrode plate.

  The present invention also relates to a method for manufacturing an edge insulating member to be attached to an edge of an electrode plate used in a metal electrolytic refining process, the step of forming a rod-shaped insulating member body by extrusion, and the insulating member A step of forming an engaged portion at an end portion in the longitudinal direction of the main body, and an end covering member is integrally formed at the end portion by injection molding, and an engaging portion that engages with the engaged portion. And a forming step.

  According to the manufacturing method of the edge insulating member according to the present invention, since the insulating member main body is formed by extrusion molding, the degree of freedom for setting the shape and dimensions of the insulating member main body increases, It is relatively easy to meet this demand.

  That is, according to the present invention, for example, compared to a method in which the entire edge insulating member is formed by injection molding, the equipment cost is greatly reduced, and not only for mass production but also for high-mix low-volume production. Can also respond flexibly. Further, when the entire edge insulating member is to be molded by injection molding, there is a risk of deformation due to residual thermal stress, but according to the present invention, the insulating member body is molded using extrusion molding. There is no fear of the aforementioned deformation.

  Further, the end covering member is integrally formed at the end of the insulating member main body by injection molding, and an engaging portion that engages with the engaged portion of the end is formed. Accordingly, there is no gap between the end covering member and the insulating member main body, and sufficient adhesion is ensured and a bonding area is ensured. Therefore, it is possible to reliably prevent the electrolyte from entering between the insulating member main body and the end covering member, and there is no possibility that the edge insulating member may be damaged due to precipitation of metal inside. .

  Further, in the conventional manufacturing method, when the insulating member main body and the end covering member are bonded using solvent bonding, the work environment due to the organic solvent was considered to be poor, but in the present invention, the insulating member main body and Since the end covering member is integrated with the injection molding, there is no fear of the above-described poor working environment.

  According to the edge insulating member and the manufacturing method thereof according to the present invention, it is possible to firmly connect the insulating member body and the end covering member, and it is possible to prevent the electrolyte from entering the inside of the insulating member main body and the long term. It can be used stably in the electrolytic refining process.

It is a front view which shows the state which mounted | wore the electrode part with the edge part insulation member which concerns on one Embodiment of this invention. It is a front view which expands and shows the edge part in the edge part insulation member of FIG. It is a bottom view which shows arrow A of FIG. It is a figure which shows the BB cross section of FIG. It is a figure which shows CC cross section of FIG. It is a figure explaining manufacture of an insulating member main part in a manufacture procedure of an edge insulating member concerning one embodiment of the present invention. It is a figure which shows the DD cross section of FIG. It is a figure explaining manufacture of an edge covering member in the manufacture procedure of the edge insulating member concerning one embodiment of the present invention. It is a figure explaining manufacture of an edge covering member in the manufacture procedure of the edge insulating member concerning one embodiment of the present invention. It is a figure which shows the EE cross section of FIG. It is a figure explaining the procedure of mounting | wearing the electrode part with the edge part insulation member which concerns on one Embodiment of this invention. It is a figure explaining the procedure of mounting | wearing the electrode part with the edge part insulation member which concerns on one Embodiment of this invention. It is a figure explaining the procedure of mounting | wearing the electrode part with the edge part insulation member which concerns on one Embodiment of this invention. It is (a) sectional drawing and (b) front view which show the modification of the to-be-engaged part in the edge part insulation member which concerns on one Embodiment of this invention. It is the (a) sectional view showing the modification of the to-be-engaged part in the edge insulating member concerning one embodiment of the present invention, and (b) the figure showing the FF section.

  An edge insulating member according to an embodiment of the present invention is attached to an edge of an electrode plate used in an electrolytic refining process such as electrolytic refining or electrowinning of metal. Used for refining.

  As shown in FIG. 1, in this electrolytic refining of copper, a stainless steel electrode plate 1 is immersed in an electrolytic solution S made of a copper sulfate solution stored in an electrolytic cell, and this electrode plate 1 is used as a cathode. Use. Then, a permanent cathode method is employed in which copper is electrodeposited on both the front and back surfaces of the electrode plate 1 to obtain a copper plate having a thickness of about 8 mm to 10 mm.

  The electrode plate 1 has a rectangular plate shape, and a pair of suspenders 2 are attached to the upper edge portion (the upper side in FIG. 1). Moreover, these suspension hands 2 are supported by a rectangular bar-shaped hanger bar 3 extending in the horizontal direction. A V-shaped groove (not shown) is formed at the lower edge of the electrode plate 1. The edge insulating member 10 of this embodiment is detachably attached to the left and right side edges of the electrode plate 1.

  The edge insulating member 10 is formed from a resin material such as plastic. In the present embodiment, the edge insulating member 10 is made of an engineering plastic having insulating properties, heat resistance, and acid resistance. As described above, by employing the engineering plastic, even when the edge insulating member 10 is immersed in the electrolytic solution S for a long time, deterioration is prevented.

  Examples of the engineering plastic include silicon resin (SI), polyethylene terephthalate (PET), polyvinylidene fluoride (PVDF), polyamide (PA), polyoxymethylene (POM), polycarbonate (PC), polyarylate (PAR), Polyphenylene oxide (PPO), polysulfone (PSF), polyphenylsulfone (PPSF), polyethersulfone (PES), polyetherimide (PEI), polyphenylene sulfide (PPS), polyetheretherketone (PEEK), polyphenyl An ether (PPE) etc. are mentioned.

  Here, since the material of the edge insulating member 10 differs depending on required heat resistance, acid resistance, the electrolytic solution to be immersed, etc., a suitable material is selected in consideration of the acid, temperature, etc. constituting the electrolytic solution. It is preferable to do. For example, in the electrolytic refining of copper in the present embodiment, since the electrolytic solution S is composed of sulfuric acid and is maintained at about 60 ° C., it has acid resistance against sulfuric acid and does not soften or deteriorate at 60 ° C. It is preferable to use polyphenyl ether (PPE) having heat resistance.

  The edge insulating member 10 is arranged along the insulating member main body 11 having a rod shape, the substantially rectangular parallelepiped end covering member 12 disposed at the end in the longitudinal direction of the insulating member main body 11, and the insulating member main body 11. And a round rod-shaped fastening rod 13 which is detachably mounted.

  A pair of edge insulating members 10 are provided on both side edges of the electrode plate 1, and the longitudinal direction of the insulating member body 11 is arranged along the vertical direction. The end covering member 12 is disposed at the lower end of the insulating member main body 11. The lower end surface of the end covering member 12 is disposed so as to protrude downward from the lower end surface of the electrode plate 1. Further, the upper end portion of the insulating member main body 11 is disposed above the liquid surface of the electrolytic solution S.

  As shown in FIGS. 2 to 5, a mounting groove 14 extending along the longitudinal direction of the insulating member body 11 is formed on a side surface (hereinafter referred to as “one side surface”) facing the electrode plate 1 side in the insulating member body 11. ing. In FIG. 4, the mounting groove 14 has a substantially U-shaped cross section perpendicular to the longitudinal direction, and is open and formed on the one side surface.

  Moreover, the opening width of the mounting groove 14 is set to be substantially the same as the thickness dimension of the electrode plate 1, and the depth of the mounting groove 14 is set to about 18 mm, for example. With this setting, the mounting groove 14 can block a hole (not shown) formed in the edge of the electrode plate 1 used in the ISA method.

  The mounting groove 14 is formed with a seal film 14A made of an elastic material such as thermoplastic elastomer. The sealing film 14 </ b> A extends along the longitudinal direction so as to follow the mounting groove 14, and the cross section thereof is formed in a substantially U shape.

  As the thermoplastic elastomer constituting the sealing film 14A, a thermoplastic elastomer that does not deteriorate even if immersed in the electrolyte solution S for a long time is used. Examples of such thermoplastic elastomers include styrene (SBC), olefin (TPO), urethane (TPU), polyester (TPEE), polyvinyl chloride (PVC), polyamide (PA), and ethylene vinyl acetate. A copolymer (EVA), a fluorine resin, etc. are mentioned.

  Specifically, as styrene (SBC), styrene butadiene styrene block copolymer (SBS), styrene isoprene styrene block copolymer (SIS), styrene ethylene butylene styrene block copolymer (SEBS), styrene ethylene propylene styrene block copolymer. A polymer (SEPS) etc. are mentioned.

  Moreover, as olefin type (TPO), various rubber materials are finely dispersed in polypropylene (PP), PP-EPM, PP-EPDM, PP-NBR, PP-IR, and polyethylene (PE) in ethylene. Examples include PE-EPDM in which propylene rubber is finely dispersed.

  Examples of the urethane (TPU) include polytetramethylene glycol (PTMG), poly (butylene adipate) diol (PBA), polycaprolactone (PCL), and poly (hexamethylene carbonate) diol (PHC).

  Examples of the polyester (TPEE) include polybutylene terephthalate-polycaprolactone (PBT-PCL) and polybutylene agitate (PBA).

  In this embodiment, a styrene ethylene butylene block copolymer (SEBS), which is a kind of styrene elastomer, is used as the seal film 14A. The hardness of the seal film 14A is set to be within the range of A30 to A90 with a type A durometer, and is set to A82 in this embodiment.

  The insulating member main body 11 and the seal film 14A are integrally formed by a two-color molding method. That is, the polyphenyl ether constituting the insulating member body 11 and the styrene ethylene butylene block copolymer constituting the sealing film 14A are filled in the same mold and integrally molded. With such a configuration, a bonding layer such as an adhesive member is not formed between the seal film 14 </ b> A and the insulating member body 11.

  Further, in the insulating member main body 11, a rod fitting groove 15 extending along the longitudinal direction of the insulating member main body 11 is formed on a side surface (hereinafter referred to as “other side surface”) facing the side opposite to the one side surface where the mounting groove 14 opens. Is formed. The rod fitting groove 15 has a cross section perpendicular to the longitudinal direction thereof formed in an arc shape or a substantially C shape in which a part of a circle is cut out, and is open to the other side surface.

  A tightening rod 13 is fitted into the rod fitting groove 15. The tightening rod 13 has a long cylindrical shape, and is formed so that its outer diameter is slightly larger than the diameter of the arc formed by the cross section of the rod fitting groove 15. That is, by fitting the tightening rod 13 into the rod fitting groove 15, the rod fitting groove 15 is deformed so as to be expanded.

  Further, an engaged portion 16 is formed at the lower end portion along the longitudinal direction of the insulating member main body 11. The engaged portion 16 is formed on at least one of the outer surface of the insulating member body 11 and the mounting groove 14 at the lower end portion.

  As shown in FIG. 5, in this embodiment, the engaged portion 16 has a cylindrical hole-like through hole that penetrates the insulating member main body 11 in the thickness direction (vertical direction in FIG. 5) from the front surface to the back surface. Is formed. That is, the engaged portion 16 is formed at both ends of the lower end portion of the insulating member body 11 so as to communicate the outer surface of the insulating member body 11 and the mounting groove 14.

  Further, in the lower end portion of the insulating member main body 11, the portion corresponding to the rod fitting groove 15 on the other side surface is gradually moved from the one side surface side to the other side surface from the lower end portion side to the upper end portion side of the insulating member main body 11. A chamfered portion 11B is formed so as to be inclined toward the side.

  A fixing hole 11 </ b> A that penetrates the insulating member body 11 in the thickness direction is formed at the upper end portion along the longitudinal direction of the insulating member body 11. 11 A of fixing holes are provided in order to fix the insulating member main body 11 to the electrode plate 1, and are arrange | positioned above the liquid level of the electrolyte solution S in the case of electrolytic refining, as shown in FIG.

  Further, the end covering member 12 is integrally formed at the lower end portion of the insulating member main body 11 using molding (injection molding). That is, the end covering member 12 is integrally formed by melting the engineer plastic (resin material) at the lower end. As shown in FIGS. 2 and 3, the end covering member 12 has a lower end surface disposed below the lower end surface of the insulating member main body 11, and the mounting groove 14 of the insulating member main body 11. It is formed so as to cover the lower part of the opening.

  As shown in FIG. 5, the end covering member 12 is also formed on the outer surface of the lower end portion of the insulating member main body 11 and in the mounting groove 14. Further, the end covering member 12 is filled and formed in the engaged portion 16 corresponding to the shape of the engaged portion 16 of the insulating member main body 11, and corresponds to the engaged portion 16. The portion is an engaging portion 17.

  Specifically, as shown in FIGS. 2 and 3, the end covering member 12 is formed in a substantially rectangular parallelepiped shape as a whole. Further, as shown in FIG. 5, portions of the end covering member 12 that are disposed in the outer surface of the insulating member main body 11 and in the mounting groove 14 are each formed in a rectangular plate shape. The portions are connected to each other by a cylindrical engaging portion 17. Thus, the end covering member 12 is integrated with the insulating member main body 11.

  Further, as the material of the end covering member 12, a resin material such as the engineering plastic same as that of the insulating member main body 11 can be used. In the present embodiment, the same polyphenyl ether as the insulating member main body 11 is used as the end covering member 12.

  Note that a resin material different from the material of the insulating member main body 11 may be used as the end covering member 12. In this case, it is desirable that the melting point of the resin material used for the end covering member 12 is set to be equal to or higher than the melting point of the resin material constituting the insulating member body 11. Thereby, the surface of the insulating member main body 11 is heated and melted by the melted end portion covering member 12 at the time of molding described later, so that the mutual bonding becomes stronger.

  Further, as the material of the end covering member 12, a resin material having excellent impact resistance such as polyphenylsulfone (PPSF) other than polyphenyl ether may be used. In this case, the electrode plate 1 is mounted on the floor or the like. The mechanical strength is sufficiently secured against the impact received by the edge insulating member 10 during placement.

  Next, a procedure for manufacturing the edge insulating member 10 will be described with reference to FIGS.

  As shown in FIGS. 6 and 7, first, the insulating member body 11 is formed by extrusion molding. Specifically, by using a two-color molding method, the polyphenyl ether constituting the insulating member body 11 and the styrene ethylene butylene block copolymer constituting the seal film 14A are filled in the same mold and extruded integrally. Mold.

  Next, the fixing hole 11 </ b> A and the engaged portion 16 are formed so as to penetrate the insulating member main body 11 in the thickness direction. The fixing hole 11A and the engaged portion 16 are formed so as to open to the seal film 14A of the mounting groove 14, respectively.

  Further, as shown in FIG. 6, the chamfered portion 11 </ b> B is formed in the portion corresponding to the rod fitting groove 15 on the other side surface in the lower end portion (left side in FIG. 6) of the insulating member body 11 by cutting.

  Next, as shown in FIGS. 8 to 10, the end covering member 12 is integrally formed at the lower end portion of the insulating member main body 11 and is engaged with the engaged portion 16 by molding (injection molding). A portion 17 is formed. Specifically, as shown in FIG. 8, an injection molding apparatus 20 is used, and the lower end portion of the insulating member main body 11 is disposed in a mold of the injection molding apparatus 20. Then, the mold is placed in a high pressure state, the molten resin material is injected toward the lower end portion, and the mold is filled into the mold to be solidified into the shape of the end covering member 12.

  At this time, as shown in FIG. 10, the melted resin material is also filled into the engaged portion 16 formed at the lower end portion of the insulating member main body 11. Specifically, in the mold, a melted resin material is placed in both ends of the lower end portion of the insulating member main body 11 facing outward in the thickness direction, and in the mounting grooves 14 disposed therebetween. The resin material is filled in each of the both end faces and the engaged portion 16 opened in the mounting groove 14.

  In this injection molding, if the portion of the insulating member main body 11 that is disposed in the mold is set so that its surface is slightly melted by heating (temperature and material selection), the insulating member main body 11 and the end covering member 12 are preferable because the bonding strength is further increased. Further, the sealing film 14A having a melting point lower than that of the insulating member main body 11 surely melts the portion disposed in the mold. As a result, even in the mounting groove 14, no gap is generated between the insulating member main body 11 and the end cover member 12, and bonding with adhesive force is performed.

  Further, although not particularly illustrated, the fastening rod 13 is formed by extrusion molding. As the material of the fastening rod 13, for example, it is preferable to use the same resin material as that used for the insulating member body 11 or a material having a hardness higher than that.

  Next, a procedure for mounting the edge insulating member 10 thus manufactured to the electrode plate 1 will be described with reference to FIGS. 11 to 13.

  First, as shown in FIG. 11, the edge insulating member 10 is mounted on the electrode plate 1 by fitting the side edge of the electrode plate 1 into the mounting groove 14 of the insulating member body 11. Here, what is indicated by reference numeral 1A in the figure is a rectangular cutout formed at the lower end of the side edge of the electrode plate 1 corresponding to the shape in the mounting groove 14 of the end covering member 12. With this mounting, the notch 1A and the end covering member 12 are brought into close contact with each other.

  At this time, as shown in FIG. 4, the end surface of the side edge portion of the electrode plate 1 is abutted against the bottom surface (that is, the surface facing the one side surface) of the mounting groove 14. Further, in the cutout portion 1A of the electrode plate 1, the surface facing the side is an end surface facing the one side surface of the portion disposed in the mounting groove 14 of the end covering member 12, as shown in FIG. Abut. Further, in the cutout portion 1A of the electrode plate 1, the surface facing downward is the end surface facing the upper end portion of the portion disposed in the mounting groove 14 of the end covering member 12, as shown in FIG. Abutted.

  Next, as shown in FIGS. 12 and 13, the fastening rod 13 is inserted into the rod fitting groove 15 of the insulating member body 11. Specifically, the tightening rod 13 is inserted into the rod fitting groove 15 from the chamfered portion 11 </ b> B from the lower end side toward the upper end side along the longitudinal direction of the edge insulating member 10. Thus, by fitting the fastening rod 13 into the rod fitting groove 15 on the other side surface of the insulating member body 11, the groove width of the mounting groove 14 on one side surface side (that is, the inner dimension in the thickness direction) is increased. In addition to being reduced, the sealing film 14 </ b> A is more firmly attached to the electrode plate 1.

  After the edge insulating member 10 is mounted on the electrode plate 1, the electrode plate 1 is used as a cathode, and immersed in the electrolyte solution S together with an anode made of crude copper. In the state shown in FIG. Perform electrolysis for hours. As a result, copper having a thickness of 8 mm to 10 mm is deposited on both surfaces of the electrode plate 1, and a high purity copper plate is obtained by peeling them off.

  As described above, according to the edge insulating member 10 according to the present embodiment, the end covering member 12 is formed integrally with the molten resin material solidified at the lower end portion of the insulating member main body 11. That is, since the end covering member 12 is integrally formed with the insulating member main body 11 by molding, a gap is not generated between the end covering member 12 and sufficient adhesion is secured. Area is secured.

  Therefore, the electrolyte solution S can be reliably prevented from entering between the insulating member main body 11 and the end covering member 12. That is, conventionally, since the insulating member main body and the cap-shaped end covering member are bonded using ultrasonic bonding, solvent bonding, or the like, a gap is generated between the bonding surfaces. In some cases, the electrolytic solution S permeates into the inside of the part insulating member and copper precipitates inside, thereby damaging the edge insulating member. On the other hand, according to the edge insulating member 10 of the present embodiment, since the gap is not generated, the infiltration of the electrolyte S can be prevented and the above-described damage is not caused.

  Also, since the joint area between the insulating member main body 11 and the end covering member 12 is sufficiently secured by the integral molding, the insulating member main body 11 and the end covering member 12 are firmly connected to each other and joined together. The strength is greatly increased. Furthermore, the engaging portion 17 is formed by solidifying the melted resin material corresponding to the shape of the engaged portion 16 during the integral molding. Therefore, the engaged portion 16 and the engaging portion 17 are securely engaged, and the joining area between the insulating member main body 11 and the end covering member 12 is further increased.

  With such a configuration, the edge insulating member 10 has sufficient mechanical strength against an external force that relatively displaces the insulating member main body 11 and the end covering member 12. Further, since the engagement between the engaged portion 16 and the engaging portion 17 is a three-dimensional engagement with the through hole and the columnar member filled and solidified therein, the insulating member main body 11 and the end portion Compared with the configuration in which the covering member 12 is simply two-dimensionally joined to each other in plane, the rigidity against the external force applied from various directions is greatly enhanced.

  Furthermore, the engagement portion 16 and the engagement portion 17 are formed, so that shrinkage (thermal deformation) due to cooling when the end covering member 12 is solidified is also suppressed.

  Further, in the copper electrolytic refining process as described in the present embodiment, a heat cycle in the copper sulfate solution (electrolytic solution S) can be considered. According to this edge insulating member 10, the above-described integral molding and Engagement improves the adhesion between the insulating member main body 11 and the end covering member 12 and also ensures the mechanical strength against thermal stress. It can be used stably in the electrolytic refining process.

  Moreover, since the engaged portion 16 of the insulating member main body 11 is formed of a through hole, the engaged portion 16 can be formed relatively easily by a simple process such as a drilling process.

  Further, since the engaged portion 16 is formed of a through hole, when the end covering member 12 is molded, the melted resin material can be easily filled in the engaged portion 16, and the engaging portion 17 can be accurately obtained. Thus, the engaged portion 16 and the engaging portion 17 can be engaged with each other relatively easily and stably.

  In addition, a sealing film 14A made of an elastic material is formed in the mounting groove 14, and the side edge portion of the electrode plate 1 fitted in the mounting groove 14 is brought into close contact with the sealing film 14A to form the insulating member body 11. Will be covered. Therefore, the edge insulating member 10 is stably supported by the electrode plate 1 without being displaced or dropped with respect to the electrode plate 1, and the side edge of the electrode plate 1 and the sealing film 14A. The electrolytic solution S is prevented from entering the mounting groove 14 from between the two.

  Further, since the insulating member main body 11 and the seal film 14A are integrally formed by the two-color molding method, the electrolytic solution S does not enter between the insulating member main body 11 and the seal film 14A. Therefore, it is more reliably prevented that copper is deposited inside the mounting groove 14 and the mounting groove 14 is pushed and widened, and the edge insulating member 10 is detached from or displaced from the electrode plate 1.

  In this embodiment, since the sealing film 14A is composed of a styrene ethylene butylene block copolymer that is a thermoplastic elastomer, the sealing film 14A is immersed in the electrolytic solution S maintained at about 60 ° C. for a long time. Even in this case, the sealing film 14A is not deteriorated, the electrode plate 1 and the edge insulating member 10 are firmly fixed, and the edge insulating member 10 is detached from or shifted from the electrode plate 1 during electrolysis. Can be prevented.

  Furthermore, since the hardness of the sealing film 14A is set to A82 with a type A durometer, the adhesion between the electrode plate 1 and the sealing film 14A is reliably improved. Further, when a hole is formed like the electrode plate 1 used in the ISA method, the seal film 14A is elastically deformed into the hole, and the seal film 14A entering the hole is anchored. Since the effect is produced, the edge insulating member 10 can be more firmly fixed to the electrode plate 1.

  Further, the insulating member main body 11 and the end covering member 12 are made of polyphenyl ether excellent in insulation, impact resistance, heat resistance, and acid resistance, so that the edge insulating member 10 is made of sulfuric acid 60. Even when immersed in the electrolytic solution S at 0 ° C. for a long time, deterioration of the insulating member main body 11 and the end covering member 12 can be prevented.

  Further, the edge insulating member 10 can be attached to and detached from the electrode plate 1 by fitting or removing the tightening rod 13 from the rod fitting groove 15. Therefore, it is possible to easily attach and remove the edge insulating member 10 to and from the electrode plate 1. Further, since the sealing film 14A is tightly adhered to the surface of the electrode plate 1 by the above-described fitting of the clamping rod 13, the electrolytic solution S does not enter between the electrode plate 1 and the copper plate deposited on the electrode plate 1 Can be easily peeled off.

  Moreover, according to the manufacturing method of the edge insulating member 10 described above, since the insulating member main body 11 is formed by extrusion molding, the degree of freedom for setting the shape and dimensions of the insulating member main body 11 is increased, and the edge insulating body is increased. Various requirements for the member 10 can be handled relatively easily.

  That is, according to the present embodiment, for example, compared to a method in which the entire edge insulating member 10 is formed by injection molding, the equipment cost is greatly reduced, and not only mass production but also high-mix low-volume production is possible. It is possible to respond flexibly to production. In addition, when the entire edge insulating member 10 is to be formed by injection molding, there is a risk of deformation due to residual thermal stress. However, according to the present embodiment, the insulating member body 11 is formed using extrusion molding. Therefore, there is no risk of the above-described deformation.

  Further, in the conventional manufacturing method, for example, when the insulating member main body 11 and the end covering member 12 are bonded using solvent bonding, the working environment due to the organic solvent is considered to be inadequate. In addition, since the insulating member main body 11 and the end cover member 12 are integrated using injection molding, there is no fear of the above-described poor working environment.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the engaged portion 16 of the insulating member main body 11 is formed by a cylindrical hole-like through hole, but the present invention is not limited to this. That is, the engaged portion 16 may have a prismatic hole shape other than the cylindrical hole shape or other shapes. Further, the shape of the engaging portion 17 formed corresponding to the engaged portion 16 is not limited to the above-described embodiment.

  Moreover, the to-be-engaged part 16 and the engaging part 17 may each be formed in multiple numbers.

  14 and 15 show a modified example of the engaged portion 16 described in the above embodiment. As shown in the drawing, as the engaged portion of the insulating member body 11, an engaged portion 26 made of a bottomed hole and an engaged portion 36 made of a groove are formed instead of the engaged portion 16 described above. It is good as well.

  Specifically, as shown in FIG. 14, the engaged portions 26 and 36 may be formed only on the outer surface of the lower end portion of the insulating member main body 11. In the illustrated example, the engaged portions 26 and 36 are formed on at least one of a pair of surfaces of the insulating member body 11 facing outward in the thickness direction.

  Further, as shown in FIG. 15, the engaged portions 26 and 36 may be formed only in the mounting groove 14 in the lower end portion of the insulating member main body 11. In the illustrated example, the engaged portions 26 and 36 are formed on at least one of a pair of surfaces facing the inner side (center) in the thickness direction in the mounting groove 14.

Further, the engaged portions 26 and 36 may be formed on both the outer surface of the lower end portion of the insulating member main body 11 and the mounting groove 14.
Moreover, the shape, arrangement | positioning, and quantity of the to-be-engaged parts 26 and 36 are not limited to the example of illustration.

  In addition to the above-described engaged portions 16, 26, and 36, the surface roughness of the insulating member main body 11 is increased by using convex portions protruding from the outer surface or the mounting groove 14, blasting, or the like. You may use the set uneven | corrugated | grooved part.

  Thus, even if the shape of the engaged portion is variously set, the engaging portion of the end covering member 12 is formed without a gap corresponding to the shape of the engaged portion. .

  In the above-described embodiment, the insulating member main body 11 and the end covering member 12 have been described as being composed of polyphenyl ether. However, the present invention is not limited to this, and other resin materials may be used. . However, it is preferable to select an engineering plastic excellent in acid resistance and heat resistance in consideration of the component, temperature, and time of the electrolytic solution S in which the electrode plate 1 is immersed.

  In addition, the thermoplastic elastomer constituting the sealing film 14A of the mounting groove 14 has been described using a styrene-based styrene ethylene butylene block copolymer (SEBS), but is not limited thereto. It may be a thermoplastic elastomer. However, urethane type (TPU) is poor in acid resistance, and polyester type is inferior in warm water resistance. Therefore, it is more preferable to use a styrene (SBC) or olefin (TPO) thermoplastic elastomer. .

  Moreover, although the insulating member main body 11 and the sealing film 14A are integrally formed by the two-color molding method, the present invention is not limited to this. That is, the insulating member main body 11 and the seal film 14A may be manufactured separately and then integrally connected by an adhesive member such as an adhesive. However, as described in the above-described embodiment, it is desirable to use a two-color molding method because a bonding layer made of an adhesive member is not formed between the seal film 14A and the insulating member body 11.

  Further, as shown in FIGS. 14 and 15, the seal film 14 </ b> A may not be formed in the mounting groove 14.

  Further, in the above-described embodiment, the electrolytic refining of copper by the permanent cathode method has been described. However, the present invention is not limited to this, and is used for electrolytic refining and electrowinning of other metals such as Ni and Zn. The edge insulating member 10 attached to the electrode plate 1 may be used.

DESCRIPTION OF SYMBOLS 1 Electrode plate 10 Edge insulating member 11 Insulating member main body 12 End covering member 14 Mounting groove 14A Seal film 16, 26, 36 Engagement part 17 Engagement part

Claims (4)

An edge insulating member attached to the edge of an electrode plate used in a metal electrolytic refining process,
An insulating member body having a rod-like shape and having a mounting groove extending along the longitudinal direction;
An end covering member disposed at an end in the longitudinal direction of the insulating member main body,
An engaged portion is formed on at least one of the outer surface of the end portion and the mounting groove,
The end portion covering member is formed integrally with the melted resin material by solidifying the end portion, and has an engaging portion formed corresponding to the shape of the engaged portion. Edge insulation member. The edge insulating member according to claim 1,
The edge insulating member, wherein the engaged portion is one of a bottomed hole, a through hole, and a groove. The edge insulating member according to claim 1 or 2,
A sealing film made of an elastic material is formed in the mounting groove,
The edge insulating member, wherein the insulating member main body and the seal film are integrally formed by a two-color molding method. A method of manufacturing an edge insulating member to be attached to an edge of an electrode plate used in a metal electrolytic refining process,
A step of forming a rod-shaped insulating member body by extrusion molding;
Forming an engaged portion at the longitudinal end of the insulating member body;
And a step of integrally forming an end covering member at the end by injection molding and forming an engaging portion that engages with the engaged portion. .

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