JP2008006396A - Coating device and method for preparing electrode plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing an electrode with an improved precision by coating a core member of the electrode with a paste material on both sides in a form of stripes. <P>SOLUTION: The method for manufacturing an electrode comprises the step of coating a core member 13 with a paste material on both sides and the step of scraping off the excessive paste material on the core member 13 using blades 16, 18 each disposed on either side of the core member 13 respectively to adjust the thickness A of the paste material 12a on the face side of the core member 13 and the thickness B of the paste material 12b on the back side in such a manner that the thicknesses A and B satisfy a predetermined relationship. The blade 16 is constituted of a rubber lining 16-1b attached to a metal member 16-1a and the blade 18 is constituted of a single rubber member 18-1b with the core member 13 sandwiched between the rubber lining 16-1b and the rubber member 18-1b to form a uncoated part. The rubber lining 16-1b is made to have a prescribed hardness, width and thickness. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a coating apparatus and an electrode plate manufacturing method, and more particularly to a technique for coating a paste-like material in a stripe shape.

  Conventionally, electrode plates such as nickel metal hydride batteries and lithium ion batteries are formed by applying a paste-like material containing an electrode plate constituent material in stripes on both sides of a metal core or base material. The non-coated portion in the stripe shape is formed by restricting the application of the paste-like material or scraping off with a blade after coating, and the non-coated portion functions as a lead portion for joining the current collector to the electrode plate. To do.

  Patent Document 1 shown below describes an apparatus for applying a paste to a porous core material uniformly on the front and back sides. 18 and 19 show the configuration disclosed in this prior art. In FIG. 18, when the band-shaped (hoop) porous metal core 1 passes through the paste storage tank 3 via the reverse roller 2, the paste adheres to both surfaces of the porous metal core. In order to adjust this adhered paste to a certain amount of paste, excess paste is scraped off by the slits 5 formed between the pair of doctor blades 4 in FIG. Thereafter, the porous metal core on which the paste coating layer is formed passes through a drying furnace 6 to obtain a dried electrode plate.

  Further, Patent Document 2 below has at least two or more discharge slits, and the downstream lip of the discharge port surface of each discharge slit is notched rearward from the upstream lip with reference to the paint discharge direction. And a support member for slidingly supporting the continuously running base material, the die and the support member are disposed so as to sandwich the base material, and a predetermined gap is provided between the die and the support member. In other words, it is disclosed that a paint is discharged from a discharge slit and applied to a substrate in stripes.

JP-A-8-37005 JP 2001-327906 A

  After forming the paste-like material in stripes on the front and back of the core material (or base material), an electrode plate is formed through a rolling process, but the thickness of the paste-like material applied to the front and back is controlled with high accuracy. If not, the warpage and shape of the electrode plate are not stabilized in the rolling process, and the machine operation rate in the subsequent processing process and battery assembly process decreases.

  An object of the present invention is to improve the production efficiency by controlling the thickness of the paste-like material applied to the front and back surfaces of the core material to have a certain relationship.

  Another object of the present invention is to improve the formation accuracy of the uncoated portion of the paste-like material formed in a stripe shape, thereby improving the production efficiency.

  The present invention is a coating apparatus for applying a paste-like material to the front and back of the core material in a stripe shape, and scraping off the excess paste-like material applied to the front and back of the core material, the total thickness of the application portion The coating thickness adjustment section for adjusting the coating thickness and the coating thickness adjustment portion for forming the uncoated portion by setting the coating thicknesses on the front and back surfaces to a predetermined relationship and removing the paste-like material applied to the front and back surfaces The blade includes a front side blade disposed on the front side of the core material, and a back side blade disposed on the back side of the core material, the front side blade and the back side blade The at least one non-application part forming part is formed by providing an elastic member at the tip of a metal or resin member.

Further, the present invention is an electrode plate manufacturing method for manufacturing an electrode plate by applying a paste-like material in stripes on the front and back of the core material, and the coating thickness of the blade sandwiching the core material from the front side and the back side A process of adjusting the total thickness of the application part by scraping off the excess paste applied to the front and back of the core material by the adjustment unit, and a predetermined relationship between the application thicknesses of the front and back by the non-application part forming part of the blade And forming a non-coated portion by removing the paste-like material applied to the front and back, and the blade is a front blade disposed on the front side of the core material, A non-coated portion forming part of at least one of the front side blade and the back side blade is provided with an elastic member at the tip of a metal or resin member. It is characterized by.
In one embodiment of the present invention, the tip of the non-application part forming part in one of the front blade and the back blade is brought into contact with the core member by a spring elastic force.

  In another embodiment of the present invention, the predetermined relationship is that the coating thickness of either the front or back of the core material is thinner than the other, and the coating thickness of the front blade or the back blade is the coating thickness. The non-application part of the blade corresponding to the thin side is configured by providing an elastic member at the tip of the metal or resin member, and the non-application part formation part of the blade corresponding to the thick application side is an elastic member. Consists of

  Furthermore, in another embodiment of the present invention, the predetermined relationship is that the coating thickness of either of the front and back surfaces of the core material is thinner than the other, and both the front blade and the back blade are not The application part forming part is configured by providing an elastic member at the tip of a metal or resin member.

  ADVANTAGE OF THE INVENTION According to this invention, the relationship of the coating thickness of the front and back of the paste-like thing at the time of manufacturing an electrode plate can be adjusted with sufficient precision. Moreover, the width | variety of a non-application | coating part of a paste-like material at the time of manufacturing an electrode plate, and a squeezing property (ensure the metallic luster of a core material) can be adjusted with sufficient precision.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Basic configuration>
In FIG. 1, the basic composition of the electrode plate manufacturing method in this embodiment is shown. The blade 16 (fixed) and the blade 18 (movable) are arranged on the front side and the back side of the electrode plate 10, respectively, and applied to the front and back surfaces by the coating thickness adjusting sections 16-2 and 18-2 of the blade 16 and the blade 18. The excess paste-like material is scraped off to adjust the total thickness to form the coated portion 12. The non-application forming portions 16-1 and 18-1 embedded in the blade 16 and the blade 18, respectively, set the respective coating thicknesses on the front and back of the core material to a predetermined relationship and remove the paste-like material to make the non-application This is a configuration for forming the portion 14. The electrode plate 10 is moved in the Z direction in the drawing with the paste-like material applied thereto, the blade 16 is fixed at a predetermined position, and the blade 18 is moved in the X direction in the drawing substantially perpendicular to the surface of the electrode plate 10. The electrode plate 10 is sandwiched between the blade 16 and the blade 18. The thickness of the coating portion 12 is determined by the gap between the blade 16 and the blade 18 where the non-application portions 16-1 and 18-1 are not embedded (application thickness adjusting units 16-2 and 18-2). The portions where the non-application forming portions 16-1 and 18-1 are embedded contact the core material of the electrode plate 10 to remove the paste-like material.

When a paste-like material containing an electrode plate constituent material (including an active material member added to a core material, an additive member, a binding member, etc.) is formed in a stripe shape, it is necessary to pay attention to the following two points.
(1) Maintain a constant relationship between the thickness of the coated portion 12 on the front side and the thickness of the back side. (2) Maintain the width of the non-coated portion 14 and the squeezing property (ensure the metallic luster of the core material) ( The squeezing property of 2) represents the degree of removal of the paste-like material from the core material, and can be evaluated by whether or not the core material has a metallic luster.
(1) affects the production efficiency in the rolling process after the coating process, the electrode processing process, or the battery assembly process. That is, in order to cause a warp in a certain direction in the rolling process, a constant relationship between the thickness on the front side and the thickness on the back side of the coated portion 12, more specifically, one thickness is made thicker than the other. If this relationship varies, the electrode plate 10 will swell in the rolling process. As a result of diligent study, the inventor of the present application has defined that the thinner paste-like material is the front side and the thicker side is the back side (of course, this is a definition for convenience and the thicker side may be defined as the front side) Between the front side thickness A and the back side thickness B, approximately B = A × 1.3
It has been found that the electrode plate 10 can be maintained in a state in which a slight warp is generated in a certain direction during the rolling process. In addition, considering the allowable range,
A × 1.0 ≦ B ≦ A × 2.0
It is desirable that When A = 0.238 mm and B = 0.122 mm, reverse warping occurs after rolling, and when A = 0.109 mm and B = 0.253 mm, the longitudinal and width directions of the electrode plate are processed after processing. Both are warped. When A = 0.186mm, B = 0.193mm, A = 0.172mm, B = 0.224mm, and A = 0.142mm, B = 0.250mm It has been confirmed that a shape with a slight warpage can be obtained. The blade 16 and the blade 18 of the present embodiment are configured to satisfy such a relationship.

  FIG. 2 is a cross-sectional view taken along the line A-A ′ of the blade 16 and the blade 18 illustrated in FIG. 1. It is the cross section in the site | part in which the non-application part formation parts 16-1 and 18-1 which form the non-application part 14 were embedded. The electrode plate 10 has a core material 13, and a paste-like material is applied to the front and back of the core material 13. The thickness A of the paste-like material 12a on the front side and the thickness B of the paste-like material 12b on the back side are uncoated portion forming portions 16-1, 18 embedded in the blade 16 and the blade 18 so as to have the above relationship. -1 is adjusted to maintain the position of the core material 13 in the gap between the coating thickness adjusting units 16-2 and 18-2 at a predetermined position. The blade 16 is disposed on the front side of the core member 13, and the blade 18 is disposed on the back side of the core member 13. The coating thickness adjusting portions 16-2 and 18-2 of the blade 16 and the blade 18 are portions located above the blades 16 and 18, and the total thickness of the coating portion 12 is determined by this gap. The application thickness adjusting units 16-2 and 18-2 are made of a metal material.

  The non-application part forming part 16-1 arranged on the front side, that is, the side where the paste-like material is thin, is configured by lining a rubber 16-1b on the tip of the metal material 16-1a. The metal material 16-1a has a substantially rectangular parallelepiped shape, and the rubber 16-1b is bonded to the tip surface. The front end surface of the rubber 16-1b is in contact with the core member 13, and the paste-like material on the front side is removed to form the uncoated portion 14. The non-application part forming part 16-1 is configured to be able to change the position of the core material in the gap between the application thickness adjusting parts 16-2 and 18-2 by pushing out or pulling in the direction of the core material 13. The metal material is, for example, stainless steel, and the rubber is, for example, urethane rubber.

  The non-application part formation part 18-1 arrange | positioned on the back side, ie, the side where the thickness of a paste-form thing is thick, is comprised from rubber | gum single-piece | unit. The front end surface of the rubber abuts against the core material 13 and the paste-like material on the back side is removed to form the uncoated portion 14. As shown in the figure, the non-application part forming part 18-1 is urged in the direction of the core material 13 by the elastic force of a spring or the like and abuts against the core material 13, and sandwiches and presses the core material 13 from the front and back sides to paste. Remove. The rubber is, for example, urethane rubber. As described above, the configuration of the non-application part forming part 16-1 used on the front side is such that the rubber 16-1b is lined on the tip of the metal material 16-1a, whereby the application thickness adjusting part 16- The positional relationship of the core member 13 in the gap between 2 and 18-2 can be maintained with high accuracy. Moreover, in that case, when one non-application part formation part 16-1 is fixed and the other non-application part formation part 18-1 is urged | biased to the core material 13 with elastic force, such as a spring, the position of the core material 13 is further The relationship can be maintained with high accuracy. Furthermore, by optimizing the thickness and hardness of the rubber 16-1a of the non-application part forming part 16-1, the positional relationship of the core member 13 is maintained with higher accuracy. As a result, the above (1) and (2) can be achieved.

  On the other hand, when both the non-application part formation part 16-1 and the non-application part formation part 18-1 are comprised from the rubber single-piece | unit, the positional relationship of the core material 13 cannot be maintained with high precision by elastic deformation of rubber, 1) and (2) cannot be satisfied.

  In this embodiment, the non-application part forming part 16-1 on the side where the thickness of the paste-like material is thin (assumed to be the front side in this embodiment) is basically composed of a metal material and rubber, The non-application part forming part 18-1 on the thick side (the back side in the present embodiment) is composed of a single rubber, but the non-application part forming part 18-1 is the same as the non-application part forming part 16-1. Alternatively, a rubber material may be lined with a metal material.

  FIG. 3 shows a configuration example in this case. The structure of the non-application part forming part 16-1 is the same as that of FIG. 2, but the non-application part formation part 18-1 is configured by lining a rubber 18-1b on a metal material 18-1a. The metal material 18-1a is, for example, stainless steel, and the rubber 18-1b is, for example, urethane rubber. In this case, the thickness and hardness of the rubber 18-1b are set to optimum values.

  In the present embodiment, the rubber 16-1b or the rubber 18-1b may be formed by lining a hard resin instead of a metal material.

<Detailed configuration>
FIG. 4 shows a detailed configuration of the present embodiment. It is the whole structure of an electrode plate manufacturing apparatus. The paste-like material containing the electrode plate constituting material is supplied from the paste-like material tank 20 by a mono pump (uniaxial eccentric screw pump). The core material 13 is conveyed through a roller into the paste pool, and is pulled up from the paste pool with the paste-like material attached to the front and back. The core 13 pulled up from the paste pool is scraped off to some extent by the smoother 22 and then conveyed between the blades (doctor knives) 16 and 18.

  The blade 16 is a fixed blade, and an uncoated portion forming portion 16-1 having a urethane rubber rubber 16-b lined on the tip surface of a stainless steel metal material 16-1a is embedded in the upper portion of the blade 16. . The blade 18 is a movable blade and is configured to be movable in the direction of arrow 100 in the figure. The gap between the coating thickness adjusting unit 16-2 of the blade 16 and the coating thickness adjusting unit 18-2 of the blade 18 is variably adjusted by the movement of the blade 18 in the arrow 100 direction. An uncoated portion forming portion 18-1 made of urethane rubber 18-1b is embedded in the upper portion of the blade 18 at a position facing the urethane rubber 16-1b, and the urethane rubber 16-1b and the urethane rubber 18-1b The core material 13 is sandwiched between. Urethane rubber 18-1b is urged by a spring in the direction of arrow 200 in the figure, and by this urging force, the urethane rubber 18-1b is pressed against the surface of the core material 13 and the paste-like material is removed from the core material 13 to remove the uncoated portion. 14 is formed.

  The core material 13 having the coating portion 12 and the non-coating portion 14 and having the paste-like material coated in a stripe shape is further lifted and conveyed to the laser displacement meter 24. The laser displacement meter 24 measures the thickness A of the paste-like material 12a by irradiating laser light and measuring the level difference between the coated portion 12 and the non-coated portion. The allowable value of the thickness of the paste-like object 12a is, for example, 0.15 mm to 0.2 mm. Of course, the thickness B of the paste 12b may be measured using the laser displacement meter 24.

An X-ray source 26a and a detector 26b are further provided above the laser displacement meter 24, and the total thickness of the coating portion 12, that is, (the thickness of the core material 13) + (the thickness of the paste-like material 12a) + (Thickness of paste 12b) is measured. If the total thickness is not within the predetermined range, the blade 18 is adjusted by moving it in the direction of the arrow 100. If the thickness of the paste 12a is measured by the laser displacement meter 24 and the total thickness is measured by the detector 26b, the thickness of the paste 12b is calculated by calculation, and the thickness A of the paste 12a is calculated. The ratio of the thickness B of the paste-like material 12b, in other words, the ratio of the thickness A on the blade 16 side which is a fixed blade and the thickness B on the blade 18 side which is a movable blade is calculated. Thickness A and thickness B are A × 1.0 ≦ B ≦ A × 2.0
It is desirable that the ratio B / A is 1.0 ≦ B / A ≦ 2.0.
The obtained A and B are supplied to a controller (not shown), and the controller determines whether or not the calculated ratio B / A is included in this range. When B / A is not within this range, the non-application part forming part 16-1 embedded in the blade 16 is pushed out or pulled in the direction of the core material 13 to thereby apply the coating thickness adjusting part 16-2. , 18-2, the B / A can be changed with high accuracy by changing the position of the core member 13 in the gap.

  The core material 13 whose thickness has been measured is transported to a drying furnace, dried, and then assembled into a battery through a rolling process and a processing process.

  Next, the surface shape in which the rubbers 16-1b and 18-1b are in contact with the core member 13 will be described. FIG. 5 shows the configuration of the rubber 16-1b. The rubber 16-1b has a concave planar shape, and the surface 16c contacts the front side of the core member 13. The core material 13 is conveyed from the lower side to the upper side in the drawing while being in contact with the surface 16c, and the paste-like material applied to the front side is removed. The rubber 16-1b is bonded and formed on the tip surface of the metal material 16-1a. The rubber 16-1b is urethane rubber, and the hardness, the width W1 and the thickness t1 are adjusted to predetermined values as will be described later. The height h1 is set to 5 mm, for example. The width W1 is set according to the size of the width of the non-application part 14.

  FIG. 6 shows the configuration of the rubber 18-1b. The rubber 18-1b also has a concave shape so as to correspond to the rubber 16-1b, and the hardness and the width W2 are adjusted to predetermined values. For example, the height h2 is set to 5 mm, which is the same as h1. The width W2 is set according to the size of the width of the non-application part 14. The surface shape of the rubber 18-1b may be the same as that of the rubber 16-1b. As described above, by increasing the thickness at both ends in the width direction at the rubber front end, the rigidity at both ends can be improved, and the dimensional accuracy of the width for removing the foot can be improved. Further, by making the central portion of the rubber a concave portion, the rigidity of the central portion is lowered, and the rubber becomes distorted. As a result, the squeezing property (gloss on the surface of the core material after removing the paste) is improved.

  Hereinafter, the hardness, width W1, W2, and thickness t1 that the rubber 16-1b and the rubber 18-1b should have will be described. In FIG. 7, the uncoated portion forming portion 16-1 on the front side is made by lining the rubber 16-1b on the metal material 16-1a, and the thickness is ignored on the uncoated portion forming portion 18-1 on the back side. The thickness of the paste-like material 12a when the thickness t1 of the rubber 16-1b is changed from 1.0 mm to 2.0 mm by using the rubber 18-1b having a thickness to an extent (that is, equivalent to a single rubber). The change of the height A is shown. In the figure, MIN, MAX, and AVE respectively indicate the minimum value, maximum value, and average value when executed multiple times. In relation to the thickness B of the paste-like material 12b, A × 1.0 ≦ B ≦ A × 2.0 is desirable. FIG. 7 shows the variation of A in a state where the total thickness is kept constant. When t1 is 1.5 mm, the variation in A is small, indicating that coating can be performed relatively stably. On the other hand, the measurement points indicated by white symbols in FIG. 7 are obtained when the same non-coated part forming part (rubber alone) is used on the front side as well. The variation of A is very large. That is, when the rubber itself is used for both the front and back, it is strongly influenced by the elastic deformation of the rubber, and it is difficult to stably maintain the relationship of the coating thickness B / A ratio.

  FIG. 8 shows the relationship between the hardness of the rubber 16-1 b of the non-application part forming part 16-1 on the blade 16 side and the width of the foot removal, that is, the width of the non-application part 14. For the purpose of optimizing the hardness of the rubber 16-1b, the thickness of the rubber 16-1b is set to a negligible thickness (that is, the same as that of the rubber alone). In short, the front side is a single rubber and the back side is a single rubber, and the data on the front side is shown. The uncoated portion 14 functions as a lead portion for joining the current collector to the electrode plate, and needs to have a desired width. For example, the uncoated portion 14 has a width of at least 5 mm and an average value of 5.7 mm. Designed as such. When the hardness of the rubber 16-1b is increased, the squeezing width (width of the non-coated portion 14) is increased, but when the hardness is 75 °, the squeezing surface is not smooth. On the other hand, when the hardness is 60 °, there is almost no dirt on the surface for removing the foot.

  FIG. 9 shows the relationship between the hardness of the rubber 18-1b of the non-application part forming part 18-1 on the blade 18 side and the width of removing the foot (the width of the non-application part 14). The back side data is shown in the same configuration as in FIG. When the hardness is 60 ° to 75 °, the squeezing width tends to slightly increase as the hardness increases. However, when the hardness is 75 °, the squeezing surface is not smooth. On the other hand, at a hardness of 60 °, the AVE is almost as designed, and there is almost no dirt on the surface for removing the foot.

  FIG. 10 shows the relationship between the thickness t1 of the rubber 16-1b and the width of removing the foot (the width of the non-coated portion 14) when the hardness of the rubber 16-1b is 60 °. The data on the front side when rubber lining is used for both front and back are shown. This is a case where the rubber width of the rubber 16-1b is 6.5 mm. As shown in the figure, when the thickness t1 = 1.5 mm, the squeezing width becomes maximum, and a value substantially equal to the design value is obtained.

  FIG. 11 shows the relationship between the rubber thickness and the squeezing width (width of the non-coated portion 14) when the rubber hardness is 60 °. FIG. 11 shows data on the back side when both the front and back sides are made of rubber lining as in the case of FIG. 10. A stable width is obtained at a thickness of 1.5 mm.

  12 to 15 collectively show the above results. FIG. 12 shows the evaluation results of the width and width of the squeeze removal part (non-coated part 14) of the rubber 16-1b disposed on the front side of the negative electrode hoop which is an electrode plate at a hardness of 60 ° to 75 °. This corresponds to FIG. In the figure, the plain portion means the uncoated portion 14. When the hardness is 70 ° or 75 °, the clearing width of the plain portion is almost as designed, but the clearing property is not good. That is, the metallic luster is not secured. On the other hand, when the hardness is 60 °, the width of the plain portion is somewhat insufficient, but the squeezing property is good. It can be understood that 60 ° is suitable as the hardness of the rubber 16-1b, since the width of the foot can be secured by increasing the width of the rubber 16-1b.

  FIG. 13 shows the evaluation results of the width and width of the foot removing portion of the rubber 18-1b at a hardness of 60 ° to 75. This corresponds to FIG. A metallic luster is secured at a hardness of 60 °. However, the width for removing the foot is small, which indicates that the width of the rubber 18-1b needs to be larger than the width of the rubber 16-1b. While the width of the rubber 16-1b is 6.5 mm as described above, the width of the rubber 18-1b is larger than 6.5 mm, for example, 7.0 mm.

  FIG. 14 shows the evaluation results of the squeezing width and squeezing property at a thickness t1 = 1.0 mm to 2.0 mm when the hardness of the rubber 16-1b is 60 ° and the width W1 is 6.5 mm. This corresponds to FIG. When the thickness t1 = 1.0 mm and 2.0 mm, the width for removing the foot cannot be secured, and when the thickness is 1.5 mm, a value almost as designed is obtained. In addition, when the hardness is 60 °, good metallic luster can be obtained at any thickness. From the above, it is appropriate that the rubber 16-1b has a hardness of 60 °, a width W1 of 6.5 mm, and a thickness t1 of 1.5 mm.

  FIG. 15 shows the evaluation results of the width of the squeezing and the squeezing ability when the hardness of the rubber 18-1b is 60 ° and the thickness is 1.0 mm to 2.0 mm. This corresponds to FIG. In any thickness, the squeezing property is ensured. From the above, it is appropriate that the rubber 18b has a hardness of 60 °, a rubber width W2 of 7.0 mm, and a thickness t2 of 1.0 mm to 2.0 mm.

  FIG. 16 shows the production distance (m) of the negative electrode hoop and the width for removing the foot (uncoated portion 14) when the hardness of the rubber 16-1b is 60 °, the width W1 is 6.5 mm, and the thickness t1 is 1.5 mm. The width of the rubber 16-1b side). Data on the front side when the front side is rubber lining and the back side is rubber alone. For comparison, a case where the rubber 16-1b is not formed as a lining on the metal material 16-1a but is a single rubber (a case where the metal material 16-1a does not exist) is shown as a conventional example. In the present embodiment, even when the production distance reaches 12000 m, the AVE of the squeezing width is substantially constant, and the negative electrode hoop can be manufactured stably.

  FIG. 17 shows the production distance (m) of the negative electrode hoop and the width for removing the foot (the width of the non-coated part 14 on the rubber 18-1b side when the hardness of the rubber 18-1b is 60 ° and the width W2 is 7.0 mm. ). Data on the back side when the front side is rubber lining and the back side is rubber alone. For comparison, a case where the rubber 16-1b is not formed as a lining on the metal material 16a but is a single rubber (when the metal material 16-1a does not exist) is shown as a conventional example. In the present embodiment, although the AVE slightly decreases when the production distance is 10,000 m to 12000 m, the width of 5.5 mm is maintained even when the AVE reaches 12000 m, and the negative electrode hoop can be manufactured stably.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this, A various change is possible.

  For example, in the present embodiment, the width of the non-coated portion 14 is set to the minimum value 5.0 mm and the average value 5.7 mm, but other values may be set, and the rubber 16-1b is set accordingly. And the widths W1 and W2 of the rubber 18-1b may be set. However, as described above, it is desirable that W1 <W2. The reason is that, on the side where the paste-like material is thick, the width of the non-coated portion 14 may be narrowed due to paste dripping.

  In this embodiment, urethane rubber is exemplified as the elastic member. However, nitrile rubber, natural rubber, CR (chlorobrene) rubber, Teflon (registered trademark) rubber, silicon rubber, EPDM (ethylene propylene) rubber, or the like may be used. Good.

It is a basic lineblock diagram of an embodiment. FIG. 2 is a basic configuration diagram of a blade in FIG. 1. It is another basic block diagram of the blade in FIG. It is a detailed block diagram of an embodiment, and is an overall block diagram of an electrode plate manufacturing apparatus. It is a block diagram of the front side blade of embodiment. It is a block diagram of the back side braid | blade of embodiment. It is a graph which shows the relationship between the rubber thickness of a front side braid | blade, and the thickness of a paste-like thing. It is a graph which shows the relationship between the rubber hardness of a front side braid | blade, and the front side squeezing width | variety, and is a figure which shows the data on the front side in the case of a rubber | gum single body on both front and back. It is a graph which shows the relationship between the rubber hardness of a back side braid | blade, and a back side footing removal width | variety, and is a figure which shows the data of the back side in the case of a rubber | gum single body both front and back. It is a graph which shows the relationship between the rubber | gum thickness of a front side braid | blade, and the width | variety removal width | variety on a front side, and is a figure which shows the data on the front side in the case of rubber lining both front and back. It is a graph which shows the relationship between the rubber | gum thickness of a back side part rate, and a back side footing removal width | variety, and is a figure which shows the data of the back side in the case of rubber lining both front and back. It is a figure which shows the evaluation result of a front side braid | blade, and is a table | surface figure corresponding to FIG. It is a figure which shows the evaluation result of a back side blade, and is a table | surface figure corresponding to FIG. It is a figure which shows the evaluation result of a front side braid | blade, and is a table | surface figure corresponding to FIG. It is a figure which shows the evaluation result of a back side braid | blade, and is a table | surface figure corresponding to FIG. It is a graph which shows the relationship between a production distance and a front side foot-job removal width | variety. It is a graph which shows the relationship between a production distance and a back side footing removal width | variety. It is a block diagram of a prior art. It is a block diagram of a prior art.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Electrode plate, 12 Application | coating part, 12a Paste-like thing (front side), 12b Paste-like thing (back side), 13 Core material, 14 Non-application part, 16 Blade (front side blade), 16-1 Unapplication part formation part, 16 -1a metal material, 16-1b rubber, 16-2 coating thickness adjusting part, 18 blade (back side blade), 18-1 non-coating part forming part, 18-1a metal material, 18-1b rubber, 18-2 coating Thickness adjustment unit, 20 paste tank, 22 smoother, 24 laser displacement meter, 26a X-ray source, 26b detector, 28 drying furnace.

Claims (12)

A coating apparatus for applying a paste-like material in stripes on the front and back of a core material,
An application thickness adjusting unit that adjusts the total thickness of the application part by scraping off excess paste applied to the front and back of the core material;
A blade including a non-application part forming part that sets each application thickness on the front and back to a predetermined relationship and forms a non-application part by removing the paste-like material applied to the front and back;
And the blade is
A front blade disposed on the front side of the core material;
A back blade disposed on the back side of the core;
And the uncoated portion forming portion of at least one of the front blade and the back blade is configured by providing an elastic member at the tip of a metal or resin member. The coating apparatus according to claim 1,
One of the front blade and the back blade, the tip of the non-application portion forming portion is in contact with the core member by a spring elastic force. In the coating apparatus according to any one of claims 1 and 2,
The predetermined relationship is such that the coating thickness of either the front or back of the core material is thinner than the other,
The non-application portion forming portion of the blade corresponding to the thin coating thickness side of the front blade or the back blade is configured by providing an elastic member at the tip of the metal or resin member, and the coating thickness is large. The non-application part forming part of the blade corresponding to the side is formed of an elastic member. In the coating apparatus according to any one of claims 1 and 2,
The predetermined relationship is such that the coating thickness of either the front or back of the core material is thinner than the other,
In both the front blade and the back blade, the non-application portion forming portion is configured by providing an elastic member at the tip of a metal or resin member. In the coating apparatus in any one of Claims 1-4,
The coating apparatus according to claim 1, wherein the elastic member is urethane rubber. The device according to any one of claims 3 and 4,
The width of the elastic member of the non-application portion forming portion with the larger application thickness is larger than the width of the elastic member of the non-application portion formation portion with the thinner application thickness. apparatus. An electrode plate manufacturing method for manufacturing an electrode plate by applying a paste-like material in stripes on the front and back of a core material,
The step of adjusting the total thickness of the application part by scraping off the excess paste-like material applied to the front and back of the core material by the application thickness adjusting part of the blade sandwiching the core material from the front side and the back side, and the non-application of the blade A step of setting each coating thickness on the front and back to a predetermined relationship by the part forming unit, and forming a non-coated portion by removing the paste-like material applied to the front and back;
And the blade is
A front blade disposed on the front side of the core material;
A back blade disposed on the back side of the core;
And the non-application forming portion of at least one of the front blade and the back blade is configured by providing an elastic member at the tip of a metal or resin member. In the electrode plate manufacturing method according to claim 7,
The electrode plate manufacturing method according to claim 1, wherein a tip of the non-application portion forming portion in one of the front blade and the back blade is in contact with a core member by a spring elastic force. In the electrode plate manufacturing method according to any one of claims 7 and 8,
The predetermined relationship is such that the coating thickness of either the front or back of the core material is thinner than the other,
The non-application forming portion of the blade corresponding to the thin coating thickness side of the front blade or the back blade is configured by providing an elastic member at the tip of the metal or resin member, and the coating thickness is large. A method for manufacturing an electrode plate, wherein the non-application forming portion of the blade corresponding to the above is constituted by an elastic member. In the electrode plate manufacturing method according to any one of claims 7 and 8,
The predetermined relationship is such that the coating thickness of either the front or back of the core material is thinner than the other,
The electrode plate manufacturing method according to any one of claims 1 to 4, wherein the uncoated portion is formed by providing an elastic member at a tip of a metal or resin member. In the electrode plate manufacturing method according to any one of claims 7 to 10,
The electrode plate manufacturing method, wherein the elastic member is urethane rubber. In the electrode plate manufacturing method according to any one of claims 9 and 10,
The electrode plate manufacturing method according to claim 1, wherein a width of the elastic member of the blade having the thicker coating thickness is larger than a width of the elastic member of the blade having the thinner coating thickness.

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