JPH081699A - Embossed sheet manufacturing apparatus - Google Patents

Abstract

PURPOSE:To enhance workability while dispensing with roll replacing work at every product by arranging a plurality of independent collars to the outer periphery of a shaft roll to assemble a grooved pressure-roll. CONSTITUTION:A pair of pressure rolls consisting of a grooved pressure roll having groove parts applying unevenness to the semi-molten sheet extruded from a die provided to the peripheral surface thereof and a pressure roll equipped with a pressure surface pressing the semi-molten sheet from the outside are arranged just before the die molding a flat sheet member in opposed relationship at a predetermined interval. A cooling device is provided in front of these pressure rolls to produce an embossed sheet. The grooved pressure roll is formed by arranging a plurality of independent collars 11, 12 to the outer periphery of a shaft roll 10. Only by replacing the collars, the grooved pressure roll capable of forming the uneven shapes corresponding to various products such as longitudinal ribs, lateral ribs or a combination of both ribs is assembled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing a ribbed separator for a storage battery, for example, by calendering a sheet extruded from an extruder into an uneven sheet.

[0002]

2. Description of the Related Art A manufacturing apparatus for making a sheet extruded from an extruder into an uneven sheet by calendering is well known. In particular, an example of manufacturing a ribbed separator for a storage battery using the apparatus is shown in FIG. A conventional example will be described. In the figure, reference numeral 1 denotes an extrusion molding machine. The extrusion molding machine 1 heats and melts a compound composed mainly of a polyolefin-based resin and a precipitating silica and a pore-forming agent, and is heated by a screw (not shown). Is extruded from the molding die 2 as a flat semi-molten sheet 3 having a relatively thick wall, and then the grooved pressure roll 4 having a plurality of annular concave grooves for rib formation formed in parallel with the circumferential surface is opposed to the pressure roll 4. The sheet 3 is rolled into a predetermined wall thickness by passing between the pressure roll 5 having a flat peripheral surface and then cooled by the cooling roll 6, and at the same time, a plurality of parallel ribs of the grooved pressure roll 4 are formed. Forming a plurality of parallel ribs according to the shape of the annular groove for use to form a pore-containing agent-containing sheet 7, and then removing the pore-forming agent with a solvent to produce a microporous ribbed separator. To do.

[0003]

However, the production of the conventional ribbed separator has the following inconveniences, and an improvement is desired. That is, the ribbed separator may be, for example, a vertical rib, a horizontal rib, a combination of a vertical rib and a horizontal rib, an S-shaped rib, a diagonal rib, a thick rib, a combination of a thick rib and a thin rib, a thick rib, a medium rib and a thin rib. There are various products such as a combination of the above, and each product requires a separate grooved pressure roll. For this reason, many expensive rolls are required, resulting in high product cost, inefficient work due to the machine stand being stopped because rolls need to be replaced, and a large space for storing many rolls is required. , If rolls are damaged, it is necessary to repair each roll,
If there is no spare roll, the desired product cannot be manufactured, and if the spare roll is used, the cost is further increased, and a storage space for the spare roll is required. Also, roll repair costs are quite expensive. Further, the ribbed separator is a sheet containing a pore-forming agent that is extruded by an extruder and roll-formed, and then the pore-forming agent is extracted with a solvent, and the solvent is dried to form a microporous sheet. However, since it is known that the sheet containing the pore-opening agent shrinks, the grooved pressure roll is designed in consideration of the product width and the shrinkage rate. However, if the compounding ratio is different, the degree of opening in the separator will also change and the shrinkage ratio will be slightly different. Therefore, even with the same product size, fine adjustment is necessary during the manufacturing process. However, since it is difficult to adjust the extrusion, extraction, and drying rate for each product and to adjust the pore-forming agent concentration in the solvent in the extraction tank, the size of the pore-forming agent-containing sheet must be adjusted. It was necessary to order a new pressure roll.

[0004]

Means for Solving the Problems An apparatus for producing a sheet with projections and depressions according to the present invention eliminates the disadvantages of the prior art described above.
Immediately in front of the flat sheet member forming die, a grooved pressure roll having a groove portion on the peripheral surface for imparting unevenness to the semi-molten sheet extruded from the die, and a pressure surface for pressurizing the semi-molten sheet from the outside In a manufacturing apparatus for a sheet with projections and depressions, in which a pair of pressure rolls each including a pressure roll are arranged to face each other with a predetermined gap, and a cooling device is provided in front of these pressure rolls, The pressure roll is characterized by being assembled by disposing a plurality of independent collars on the outer circumference of the shaft roll.

[0005]

[Operation] Vertical ribs, horizontal ribs,
Grooves that can be formed with irregular shapes corresponding to various products, such as vertical ribs and horizontal ribs, S-shaped ribs, oblique ribs, thick ribs, thick ribs and thin ribs, thick ribs, medium ribs, and thin ribs. It is possible to assemble attached pressure rolls.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a perspective view of the shaft roll 10,
The peripheral surface of is flat, and there is a single row of collar guide protrusions 1 in the width direction.
0a is provided. In addition, this color guide protrusion 10a
Multiple lines may be provided. In addition, the shaft roll 10
Has the same structure as the conventional pressure roll 5, and a heating source is provided inside so that the temperature of the roll surface can be heated to a desired temperature so that the semi-molten sheet is not hindered by crystallization due to sudden cooling and solidification. It has a heating medium such as steam or an electric heater connected to, and can control the pressure surfaces of the pressure rolls 4 and 5 to a desired temperature.

FIG. 3 is a perspective view of the collar 11. The illustrated collar 11 is formed as an annular body having a flat peripheral surface for forming a flat portion which will be a fusion-bonded portion during bag processing of the ribbed separator. There is. FIG. 4 is a perspective view of another collar 12. The illustrated collar 12 is configured as an annular body with a peripheral surface groove for forming a rib portion so that the electrode plate of the ribbed separator and the separator do not come into direct contact with each other. Has been done. still,
Reference numeral 12a in the figure denotes a groove portion provided on the peripheral surface of the collar 12. Further, guide grooves 11b and 12b for fitting with the guide projections 10a of the shaft roll 10 are provided on the inner peripheral surfaces of the collar 11 and the collar 12, respectively.

FIG. 5 shows the shaft roll 10 with the collar 1
1 is a perspective view showing a state in which a collar 12 is incorporated, and the collar 11 and the collar 12 are alternately fitted into the shaft roll 10 so as to form a pair, and assembled into a grooved pressure roll. In this case, the collars 11 and 12 at both ends are prevented from being displaced and the gaps are not generated.
The shaft roll 10 is fixed to the shaft roll 10 or is fixed to the shaft roll 10 by another member.

By combining the collar 11 and the collar 12, for example, products having different product widths can be manufactured at the same time, and conventionally, when a product having a predetermined size cannot be manufactured due to a difference in shrinkage ratio or a flaw is repaired in a roll. In that case, it was necessary to grind the surface once and then dig a groove. However, in the case of different dimensions, a dimension adjusting collar (not shown) may be combined with the collar 11 and the collar 12,
Further, since only the damaged collars 11 and 12 need to be replaced, the work of removing the entire roll from the machine base becomes unnecessary.

In the above-mentioned embodiment, an embodiment using two kinds of collars is shown. However, by preparing various colors, it is possible to assemble a grooved pressure roll having various groove portions.

[0011]

According to the uneven sheet manufacturing apparatus of the present invention, since the grooved pressure roll is a combination of the axial roll and the collar, it is not necessary to replace the roll for each product, and only the color adjustment is required. Therefore, the adjustment time is short, the workability is good without stopping, and moreover, if there is only one shaft roll, all that is needed is to store the collar, so there is no need to install it. In addition, the number of expensive rolls can be reduced as much as possible, the repair cost is low even if scratches occur, and as a result, an inexpensive product can be provided.

[Brief description of drawings]

FIG. 1 is a front view of an uneven sheet manufacturing apparatus.

FIG. 2 is a perspective view of a shaft roll.

FIG. 3 is a perspective view of a collar.

FIG. 4 is a perspective view of a collar.

FIG. 5 is a perspective view of a shaft roll with a collar incorporated therein.

[Explanation of symbols]

 1 Extrusion Molding Machine 2 Molding Die 3 Semi-Melted Sheet 4 Pressure Roll with Groove 5 Pressure Roll with Flat Perimeter 6 Cooling Roll 7 Cooling Roll 7 Pore Agent-Containing Sheet 10 Shaft Roll 10a Color Guide Protrusion 11 Color 11b Guide Groove 12 Color 12a Groove 12b Guide groove

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Minoru Kawato 630 Tarui-cho, Fuwa-gun, Gifu Pref.

Claims (1)

[Claims] 1. A grooved pressure roll provided with a groove portion on the peripheral surface immediately ahead of a flat sheet member forming die for giving unevenness to the semi-molten sheet extruded from the die, and the semi-molten sheet outside. A pair of pressure rolls composed of a pressure roll having a pressure surface to be pressed from are arranged facing each other with a predetermined interval, and in a manufacturing apparatus for a sheet with projections and depressions provided with a cooling device in front of these pressure rolls. The grooved pressure roll is assembled by disposing a plurality of independent collars on the outer circumference of a shaft roll and is assembled.