JP5713108B2 - Expanded lattice manufacturing equipment - Google Patents

Description

  The present invention relates to an apparatus for manufacturing an expanded lattice.

  Expanded lattices are mainly used for lead-acid batteries for automobiles, and are widely used because of their ease of manufacture.

  More specifically, in a lead-acid battery, an electrolytic solution and positive and negative electrodes immersed in the electrolytic solution are disposed in a battery case, and an expanded lattice is used as a substrate for the electrode.

  The expanded lattice is manufactured mainly from a sheet-like material containing lead as a main material. After the incision is made with a cutter, the expanded method is used to expand the incised portion, and the cutter. At the same time as making the incision, it is divided into a simultaneous expansion method in which the cut portion is expanded, and the simultaneous expansion method is further divided into a parallel cutter method and a right angle cutter method depending on the direction of the blade of the cutter. The sheet-like material after the expansion is punched to form an ear portion that becomes a current collecting portion. After punching, the expanded lattice is filled with a paste-like active material, divided into individual expanded lattices, and after drying and aging, becomes an electrode plate.

  As shown in FIG. 3 of Patent Document 1, the apparatus for producing an expanded lattice has an expanding processing means 3 for producing an expanded portion and an ear punching means 6 for forming a portion sandwiched between the expanded lattices at an ear portion. In the meantime, the expanding lattice is conveyed using the feeding means 4 composed of rollers.

JP 2004-63151 A

  However, since the expanding lattice manufacturing apparatus shown in Patent Document 1 expands the strip 2 (sheet-like material) by the expanding processing means 3, it expands sequentially from the outside of the sheet, but the central portion is unprocessed. In order to leave a part, distortion remains from the difference in the amount of extension, and a deflection and a wave | undulation generate | occur | produce. For this reason, it is difficult to convey the expanded lattice to the ear punching means 6 while ensuring the flatness, and the expanded lattice is conveyed in a bent or wavy state.

  When transport is performed without securing such flatness, even after punching with the ear punching means 6, the deflection and swell remain maintained, and filling as prescribed when filling the pasty active material later Cannot be performed, resulting in a defective product as an electrode plate.

  In view of such problems, the present invention removes the undulation and deflection from the expanding processing means of the sheet material containing lead as a main raw material until reaching the ear punching means, and the ear punching means in a flat state. An object of the present invention is to provide an expanding lattice manufacturing apparatus that can be transported to the outside.

  The expanded lattice manufacturing apparatus according to the present invention is as follows.

(1) Expanding means for sheet material containing lead as a main raw material, ear punching means for forming an ear of an expanded lattice processed by the expanding means by punching, and punching an ear from the expanding means A conveying direction changing roll provided in the middle of conveying the expanded lattice to the means, and a pair of upper and lower flattening rolls provided downstream of the conveying direction changing roll and passing the expanded lattice, the conveying direction changing roll However, it has the maximum diameter in the axial center part of the roll. Or it has the maximum in the same dimensional position from a center part in the intermediate position which goes to an axial direction center part and both ends.
(2) In the above (1), the flattening roll is characterized in that either one of the upper and lower roll surfaces is made of resin, and the other roll surface is made of metal.
(3) In the above (2), a roll whose surface is made of metal is a drive roll, and a roll whose surface is made of resin is a driven roll.

  According to this invention, a conveyance direction change roll shall have a maximum diameter in the axial direction center part of a roll. Or, it is assumed that it has the maximum at the same dimensional position from the central part at the intermediate position from the central part in the axial direction to remove the waviness with the subsequent flattening roll. Thus, the expanded lattice can be conveyed to the ear punching means while maintaining the planar shape. Therefore, the subsequent paste-like active material filling can be reliably performed without causing defects.

  In addition, when the flattening roll is made of one of the upper and lower surfaces made of resin and the other surface is made of metal, than when the upper and lower roll surfaces are made of resin, Since the crushing effect is enhanced, even if the sheet is an expanded lattice having a thick and high rigidity, the swell can be removed and flattened. Since one surface is made of resin, there is no sliding of the expanded lattice during transportation.

  Furthermore, when a roll whose surface is made of metal is a drive roll and a roll whose surface is made of resin is a driven roll, it is easy to replace the roll whose surface that is the driven roll is made of resin due to the mechanism of the apparatus. Become. This is because a roll whose surface is made of resin is easier to scrape and has a higher replacement frequency than a roll whose surface is made of metal.

It is the schematic of the expanded-grid manufacturing apparatus of this invention. It is a side view of the direction change roll used for this invention. It is a figure which shows the contact state of the direction change roll of this invention, and an expanded lattice.

<Method for producing expanded lattice substrate>
With reference to FIG. 1, an apparatus for manufacturing an expanded lattice will be described.

  In the expanded lattice manufacturing apparatus, the feed roll 3 is sandwiched between the expanding processing means 1 and the ear part punching means 2. The feed roll 3 includes a transport direction changing roll 5, a tension roll 6, and a flattening roll 7.

<Expanding means>
The expand processing means 1 described in the present invention is not particularly limited as long as a sheet-like material containing lead as a main material is expanded, and any of the post-expansion method or the simultaneous expansion method described above. Any of the parallel cutter method and the right angle cutter method can be used as long as it is a simultaneous expansion method.

  Further, the expanding means 1 is preferably performed by the simultaneous expansion method, and the expanding means 1 of the simultaneous expansion method is left on both sides of the sheet-like material (for example, lead alloy strip) in the width direction. The process is expanded to form a continuous expanded lattice. In addition to the simultaneous expansion method, there is also a rear expansion method, but if you want to easily obtain high accuracy after changing the parts of the processing machine when changing the expanded deployment shape, Rather than performing fine adjustment of the spreading blade, a simultaneous spreading method in which the unitized simultaneous spreading portions are completely replaced is preferable.

<Direction change roll>
The transport direction changing roll 5 described in the present invention changes the transport direction of the expanded lattice 4 discharged from the expanding processing means 1, and has a maximum diameter in the central portion in the axial direction of the roll. Or it is not restrict | limited as long as it has the maximum diameter in the same dimension position from a center part in the intermediate position which goes to an axial direction center part and both ends.

  In FIG. 2, the side view of the conveyance direction change roll 5 is shown. As shown in FIG. 2 (a), a roller having a maximum diameter at the central portion in the axial direction of the roll can be used that inclines along a gentle curve from the central portion in the roll axial direction toward both ends of the roll.

  In this drawing, the gentle curve is convex upward, but it can also be a downward convex curve. It may be a straight line instead of a curve.

  In addition, as shown in FIG. 2 (b), the maximum diameter at the central portion in the axial direction is the maximum diameter with an equal dimension width from the central portion in the axial direction toward both ends, and from the edge on the maximum diameter side to the end portion. It is possible to use one that is connected by a curved line with a convex upward.

  In addition, it can also connect with the curve which makes convex downward from the edge of a largest diameter side to an edge part, and can also make it a concave shape. It may be a straight line instead of a curve.

  Furthermore, as shown in FIG. 2 (c), an intermediate position from the central part in the axial direction toward the both ends and having the maximum diameter at the same dimensional position from the central part, from the maximum diameter side edge to the end part, It is possible to use one that is connected by an upwardly convex curve.

  In addition, it can also connect with the curve which makes convex downward from the edge of a largest diameter side to an edge part, and can also make it a concave shape. It may be a straight line instead of a curve.

  As shown in FIG. 3, the expanded lattice 4 is bent at the portion in contact with the transport direction change roll 5 by pushing up the central portion in the width direction of the expanded lattice 4 or in the vicinity of the center. It transforms into a uniform barrel shape as a whole. And this barrel type | mold is planarized by the planarization roll 7 mentioned later.

  Although the diameter of the conveyance direction change roll 5 is suitably set, specifically, the maximum diameter can be set to 100 to 500 mm, and the minimum diameter can be set to 10 to 100 mm.

  The material of the transport direction change roll 5 is not particularly limited as long as it has a higher altitude than the expanded lattice 4. Specifically, iron, stainless steel or the like can be used, and stainless steel is used among them. It is preferable because of excellent strength and corrosion resistance.

<Tension roll>
The tension roll 6 described in the present invention is provided in the middle of feeding the sheet-like workpiece 4 sent from the transport direction changing roll 5 to the next flattening roll 7. Since the expanding processing means 1 has a high processing speed, the expanded lattice 4 is sent in a state of being slack to some extent in order to be connected to the next step. The tension roll 6 moves up and down, and sends the sheet-like material 4 to the flattening roll 7 with a certain tension applied.

<Flatening roll>
The flattening roll 7 described in the present invention is provided on the downstream side of the transport direction changing roll 5 and is a pair of upper and lower rolls through which the expanded lattice 4 passes.

  The flattening roll 7 flattens the barrel-shaped expanded lattice material 4 by passing and sandwiching the expanded lattice 4 between the upper roll and the lower roll, and one roll surface is made of resin. The other roll surface is preferably made of metal. By doing in this way, there exists an effect which removes the unevenness | corrugation at the time of an expanding process, and the unevenness | corrugation which cannot be eliminated with a conveyance direction change roll.

  The resin constituting the one roll surface is not particularly limited, but polypropylene, vinyl chloride resin, polyethylene terephthalate, and the like can be used. In particular, it is preferable in terms of cost to use polypropylene.

  The resin roll surface is preferably constituted by covering a metal roll with a resin layer having a thickness of 3 to 30 mm. If it is less than 3 mm, the expanded lattice is crushed too much because the elasticity of the resin is small. On the contrary, when the thickness exceeds 30 mm, there is no difference in effect, and only the cost increases.

  The material when the surface of the flattening roll is made of metal may be the same as or different from the material of the transfer direction changing roll, but it is desirable that the thermal expansion coefficient is the same, so the same material should be used. preferable.

  Although it does not restrict | limit especially as a metal, Iron, stainless steel, etc. can be used, and it is preferable from a cost viewpoint to use the thing which gave the plating process to iron especially.

  The surface of the flattening roll made of resin and the one made of metal may be either the upper roll or the lower roll, but the roll whose surface is made of metal is the driving roll, and the roll made of resin is the driven roll It is preferable that This is because resin rolls need to be replaced due to wear more frequently than metal rolls, so it is easier to replace them with a driven roll that can complete the replacement work in a shorter time. is there.

<Ear punching means>
The ear punching means 2 described in the present invention forms the ears of the expanded lattice by press working using a mold. Moreover, it can also carry out with the rotary type cutting machine which gave the processing teeth for punching to the surface of the roll.

  The present invention will be described in detail by way of examples and comparative examples. However, the present invention is not limited to these.

<Example 1>
As a basic design, the expand manufacturing apparatus shown in FIG. 1 is used. At this time, the conveyance direction changing roll 5 having the shape shown in FIG. This is an axial length: 400 mm, a maximum diameter in the axial center: 160 mm, and a minimum diameter at both axial ends: 100 mm. And the thing which connected the axial direction center and the axial direction both ends linearly was used. As the flattening roll 7, a driving roll whose surface was made of metal and a driven roll whose surface was made of metal were used.

<Example 2>
In Example 1, a driving roll whose surface was made of metal and a driven roll whose surface was made of resin (resin: polypropylene, resin layer thickness: 20 mm) were used as the flattening roll 7. The driven roll is made of metal having an axial length of 400 mm and a roll diameter of 100 mm, and has a configuration in which a central portion in the axial direction is coated with the resin layer at 30 mm.

<Example 3>
In Example 1, a driving roll whose surface was made of metal and a driven roll whose surface was made of resin (resin: polypropylene, resin layer thickness: 20 mm) were used as the flattening roll 7. The driven roll is made of metal having an axial length of 400 mm and a roll diameter of 100 mm, and has a configuration in which the central portion in the axial direction is coated with the resin layer at 100 mm.

<Example 4>
In Example 1, a driving roll whose surface was made of metal and a driven roll whose surface was made of resin (resin: polypropylene, resin layer thickness: 20 mm) were used as the flattening roll 7. The driven roller is made of metal having an axial length of 400 mm and a roll diameter of 100 mm, and is configured to be covered with the resin layer over the entire axial length.

<Comparative Example 1>
As the basic design, the expand production apparatus shown in FIG. 1 was used, and the axial length: 400 mm and the diameter: 100 mm (uniform diameter over the entire length in the axial direction) were used as the transport direction changing roll 5. Further, as the flattening roll 7, the same one as in Example 2 was used.

<Evaluation>
An expanded lattice was manufactured and evaluated in Examples 1 to 4 and Comparative Example 1 described above. The evaluation method is as follows.
(A) Process stop status During the operation for 1 hour, the number of abnormal stops in the punching machine due to waviness and deflection, no stop: ○, stop 1-2 times: Δ, stop 3 times or more: × did.
(B) Dimensional abnormality of the expanded grid The number of times a dimensional abnormality occurred due to waviness and deflection during the one-hour process operation, no abnormality occurred: ○, abnormality occurred once or twice: did.

  If there is no process stop, about 10,000 pieces of expanded lattice cut per hour can be manufactured. However, if the process is stopped once, it takes about 15 minutes to restart due to removal of abnormal products and process check. Therefore, the production quantity is greatly reduced, and the production yield is also lowered.

  The evaluation results are shown in Table 1.

From the evaluation results in Table 1, the following can be said.

  In Comparative Example 1, waviness and deflection frequently occur in the expanded lattice, the process is frequently stopped, and there are many dimensional anomalies. On the other hand, in Examples 1-4 of the present invention, they were improved. In particular, in Example 4, the entire surface of the flattening roll was covered with a resin, so that an expanded lattice without dimensional abnormality could be stably manufactured.

  As described above, according to the present invention, it is understood that an expanded lattice with less swell and deflection and less dimensional abnormality can be manufactured.

  Although the said Examples 1-4 are about the shape of (a) of FIG. 2, the same effect was acquired also in the shape of (b) (c) of FIG.

  DESCRIPTION OF SYMBOLS 1 ... Expand processing means, 2 ... Ear part punching means, 3 ... Feed roll, 4 ... Expanding lattice, 5 ... Conveyance direction change roll, 6 ... Tension roll, 7 ... Flattening roll

Claims (2)

Expand processing means for sheet material mainly composed of lead;
Ear punching means for forming the ears of the expanded lattice processed by the expanding processing means by punching;
A transport direction changing roll provided in the middle of transporting the expanded lattice from the expanding means to the ear punching means;
A pair of upper and lower flattening rolls that are provided on the downstream side of the transport direction changing roll and pass through the expanded lattice;
The conveying direction changing roll, or have a maximum diameter in the axially central portion of the roll, or, in an intermediate position towards the both end portions from the central portion in the axial direction, have a maximum diameter equal dimension position from the central portion,
The flattening roll is an expanded lattice manufacturing apparatus in which either one of the upper and lower roll surfaces is made of resin, and the other roll surface is made of metal . In claim 1 ,
An expanded lattice manufacturing apparatus having a roll whose surface is made of metal as a driving roll and a roll whose surface is made of resin as a driven roll.

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