JP2010089846A - Chuck roll - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To minimize manufacturing cost, by sucking and carrying a web while very well maintaining the web in surface roughness and a distortion surface, by sucking and carrying the web in an excellent state without causing disruption, separation and strain between respective members of a check roll, even when there is a temperature change in use. <P>SOLUTION: This chuck roll is formed as a structure for respectively and independently arranging the axis of the chuck roll and a porous ceramics part chucked by a surface in the longitudinal direction of the roll. Thus, even when the working temperature is separate from the ordinary temperature, the web can be excellently sucked and carried without separating and disrupting the chuck roll. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The invention relates to a cylindrical chuck roll that adsorbs and conveys a continuous strip-shaped thin plate (hereinafter simply referred to as “web”) of several μm to 1 mm made of organic matter or metal, and particularly high temperature (upper limit is 50 ° C. to 300 ° C. It can withstand use at about ° C.

  Adsorption rolls for adsorbing and transporting webs have traditionally been equipped with a number of through-holes for adsorption on the surface of metal rolls, and the web is adsorbed and transported by the action of an external gas control device connected to the inside of the roll. "Was the mainstream.

This through-hole type has a weak point, and because it absorbs only through the through-hole part, it does not adsorb the part that does not hit the through-hole, so there is a scratch around the outline of the through-hole of the web, or the web is distorted. I can do it. This problem is slightly improved by increasing the number of through holes and reducing the diameter, but it is not perfect and the price of the roll at that time becomes very expensive.

For this purpose, it has been proposed that a porous body made of ceramics, plastic, metal, or the like is provided on the surface layer of a roll and the web is adsorbed on the entire surface of the porous body by sucking gas from the inside of the cylinder. Therefore, by increasing the surface accuracy, it is possible to suppress web damage and distortion, which is one of the problems, to some extent.

When used at a high temperature, it is required that the members do not peel or break due to thermal expansion of each member forming the chuck roll.

JP 2002-255423 A JP 2004-142936 A Japanese Patent Application No. 2008-137804

The technique described in the cited document 1 describes that uniform adsorption is performed by providing a porous vent (4) in the outermost layer and providing a through hole (11) having a larger eye in the innermost layer. The size of the air hole is 20 to 125 mesh, and when the web is thin and easily deformed, the transfer of the mesh shape may be a problem. As for heat, although it is described that the roll member is integrated by utilizing thermal expansion in the manufacturing process, the temperature change at the time of use is not considered, and the temperature rises from room temperature. There is no suggestion of whether or not it is suitable for use in a harsh environment. Considering that shrink fitting is performed by raising the temperature, it is natural that it cannot be used due to changes in temperature.

  The technique described in the cited document 2 is a suction roll whose outer peripheral surface is made of a porous material and shields a portion that does not contact the web. By shielding, it is designed to eliminate leakage from a portion not in contact with the workpiece and increase the attractive force. This suction roll has no problem with respect to the suction force, and the material of the cylindrical porous body 20 is not specified, but it is described as part of the invention that a porous sintered plastic sheet is pasted on the surface. Although details of the plastic sheet are unknown, it is not sufficient in terms of maintaining a certain surface roughness and surface shape. Also, under conditions where the temperature changes during use, the thermal expansion of each member is different, so that destruction, delamination, and deformation occur between the members, making it difficult to use at room temperature.

The technique described in the cited document 3 includes side plates 40 and 41 having vent holes (openings 31) to the outside on both end sides of the cylindrical porous body 26, and from the cylindrical porous body 26 to the support 22. It is a structure of a suction roll that allows gas to enter and exit from the opening. In addition, a mechanism for discharging dust and chemicals attached to the cylindrical porous body 26 to the outside in order to prevent clogging is provided. This technique is also not described regarding the temperature change during use, and is not considered in view of the structure. If this suction roll is used in an application where the temperature change is large, the support frame and the suction roll main body, the cylindrical porous body, the side plate, the gear-like support, etc. are destroyed, peeled off or deformed due to thermal expansion. It becomes difficult to use it at room temperature.

In the conventional techniques described above, use in an environment in which temperature changes occur becomes difficult as the temperature goes away from normal temperature, and breakage, peeling, and web quality deterioration occur. Examples of applications in which the temperature deviates from the normal temperature include drying, fixing, solidifying, and heat treatment of the drug applied to the web.

An object of the present invention is to obtain a chuck roll having the following characteristics.
(Ii) A chuck roll that can be attracted and transported in a good condition without causing breakage, peeling or distortion between the members of the chuck roll even when there is a temperature change during use.
(B) A chuck roll that can be sucked and conveyed while maintaining a very good surface roughness and distortion. (A) A chuck roll with low manufacturing costs.

The present invention described in claim 1 is a chuck roll that sucks and conveys a thin plate-like web at the outer periphery of the roll, and at least the following (1) to (3) from the center of the roll toward the surface layer The roll end face has the following (4) and (5), and at least one of the following (1), (4) and (5) has the following (2) via the following (3) This chuck roll has a vent passage for communicating with the inside of the cylinder from inside the cylinder and controlling the pressure in the chuck roll with an external gas control device.

  In addition, about (1)-(5) which are the main members which comprise the chuck | zipper roll of this invention demonstrated below, in a specification, it will express as (1)-(5) as it is except for one part.

(1) As shown in the schematic diagram of FIG. 2, the central axis is a cylindrical central axis that transmits a driving force for rotating the chuck roll from external power to the entire chuck roll. It is the central axis which has a part for. Specifically, (1) is rotated by power driven by a motor or a prime mover. Since it becomes the center of rotation, it is desirable to use a material having a Young's modulus of 200 GPa or more, such as tool steel, which has less deformation such as deflection as its length increases. Further, when it is desired to reduce the deflection, a ceramic having a Young's modulus of 350 GPa or more is preferable. The roundness is preferably within 5 μm. It is also possible to provide an air passage that is transmitted from the end face to the inside through (2) to (3) by an external gas flow control device.

(2) The intermediate porous body is an intermediate body made of a porous body having continuous open pores in which a plurality of rings whose inner diameter sides are provided in accordance with the outer diameter of (1) above are overlapped and joined in the thickness direction of the ring. It is a porous intermediate body that is bonded and fixed to the following (4) and is not bonded to (1) and is coaxial with the above (1). This conceptual diagram is shown in FIG. Reference numeral 10 denotes a bonded ring, and the ring shape before bonding is shown in 11. The adhesive part is 12 parts. As for the adhesion between the rings, it is more desirable not to apply the adhesive to a part of the end face, not the entire face, in order to make the gas flow in the thickness direction of the ring smooth.
The ring is made of a porous body, and metal, ceramics, cemented carbide, hard organic matter, or the like can be used. At the time of selection, the condition is that the shape is maintained even at the maximum use temperature of the chuck roll and no chemical reaction occurs.
The gas pressure increase / decrease controlled by the external gas control device is transmitted to the surface layer portion through the porous body (3). Therefore, the porosity and the average pore diameter are preferably relatively large so that the movement of the gas is not hindered. For example, a porosity of about 40% and an average pore size of about 50 μm are sufficient. However, if the porosity and the average pore diameter are too high, they become brittle and are easily deformed or broken by an external force. Therefore, it is suitable that the porosity does not exceed 80%.
Moreover, this intermediate porous body is not joined to the outer diameter portion of the central axis (1) but is in contact with the movable portion, and is supported by (4) and (5). Therefore, even when (1) and (2) move in the roll length direction relatively from the normal temperature position due to (1) and thermal expansion, etc., because the length direction is independent of (1), There is no fear of delamination or destruction expected when both are joined.
Use multiple rings. The advantage of using a plurality is the ease of manufacturing and the low manufacturing cost. Taking ceramics as an example, in order to produce a long cylindrical object, a raw material powder is obtained by a cold isostatic press or rubber press to obtain a cylindrical green body, which is subjected to intermediate processing, degreased and fired. It is necessary to process the length, inner diameter, and outer diameter later. Since the required sintered body is large, the rate of occurrence of press cracks, cracks during intermediate processing, cracks and chips during handling, degreasing cracks, sintered cracks, and the like increases. Further, when degreasing and sintering, it is necessary to slow down or lengthen the temperature raising rate and the holding rate, so that much time and electricity are required for sintering. On the other hand, in the case of a plurality of ring shapes, pressing can be performed accurately with a ring die press, and intermediate processing can be easily performed with a lathe with an outer shape and an inner diameter. Degreasing and sintering do not require a particularly long time, and since the sintered body is small, there are very few cracks. After sintering, the thickness may be determined using a surface grinder or a double-side grinder, and the inner diameter and outer shape may be adjusted after bonding and integration.
In both cases, the obtained product can be used in the same manner. However, it is very advantageous to use a plurality of rings for the cost, time, difficulty, pressing device, processing device, and the like.
A plurality of rings having the same thickness may be stacked, or there may be a plurality of types of thickness as shown in FIG.

(3) The surface layer portion is a surface layer portion in the circumferential direction of the chuck roll, and is adhered to the outer periphery of (2) and adsorbs and holds the web on the outer peripheral surface. It is a surface layer portion made of a ceramic porous body having a small pore diameter and having continuous open pores. Adhesion is performed while leaving an area that can be sufficiently adsorbed to the entire bonding surface. The bonding pattern may be a portion that does not bond in parallel with the diameter or length direction, or a lattice shape, or a meander shape, as long as the adhering force can be secured and the adhesion does not come off. . Ceramics should be mainly of a type that is relatively easily available and has established manufacturing techniques, such as aluminum oxide, silicon oxide, zirconium oxide, silicon nitride, silicon carbide, titanium carbide, and tungsten carbide. In addition, it is possible to select one that does not worry about corrosion in the use atmosphere. For example, when used at about 300 ° C. in the air atmosphere, it is suitable to use oxide ceramics because carbides and nitride ceramics have a risk of surface oxidation.

In addition, the surface roughness of the surface is preferably low considering the quality of the web, but if the average pore diameter is reduced in order to reduce the surface roughness, the adsorptive power decreases. If the adsorptive power is sufficient, an average pore diameter of 0.2 to 2 μm is desirable because the shape of the surface layer portion is difficult to be transferred to the web. Usually, if there is no adsorbate on the entire surface of the porous body, it cannot be adsorbed due to leakage from other parts, but if the average pore diameter is in the above range, there is no adsorbate on the entire surface of the porous body. “Partial adsorption” is also possible. This is because leakage from other parts is much smaller than the capacity of the gas control device. Since the surface layer portion in this range is basically used in the present invention, the leakage from the portion where the web is not adsorbed on the outer peripheral surface of (3) is not particularly considered.
The reason why both the porosity and the pore diameter are smaller than those in (2) is that the most acting point of the flowing gas is between the web and the surface layer portion. On the other hand, if the pore diameter is larger than (2), the gas movement regulation point is between (2) and (3), so that the chuck surface adsorption cannot be controlled.

(4) The end face member 1 is a ring-shaped dense body which is joined to the above (1) and is provided on one end face of the above members (2) and (3), and seals one end face of the chuck roll. It is an end surface member to do. A schematic diagram is shown in FIG. The left figure of FIG. 5 is the figure seen from the edge part of a roll, and the right side is the figure seen from the center direction of the roll. (2) Since the porous body of (3) has a gas leak toward the end face of the cylinder, a member for sealing the end face is required on the end face. The material is not particularly limited as long as it can be sealed, and even if it is made of metal, ceramic or organic material, it can be appropriately sealed. By the action of this member, (3) adsorption and release of the surface layer portion can be followed by an external gas control device. Moreover, this end surface member 1 is joined to (1). In the same figure, the case where it has the blind hole 32 opened in order to bolt both is shown. By this bonding, the entire chuck roll can be rotated simultaneously by rotating (1).
Further, when the gas between (3) and the web is controlled through (2) by an external gas control device, an air passage 31 penetrating this member is provided.

(5) The end face member 2 is an end face member on the side facing the end face described in the above (4), is a ring-shaped dense body, and the chuck roll end face is joined by joining with the above (2) and (3). If the lengths of (1) and (2) change relatively due to sealing and thermal expansion, follow (2) and move relative to (1) only in the length direction of the chuck roll. Thus, the end face member has a structure for maintaining a sealed state. An example of the structure is shown in FIG. In this figure, (2) and (5) are examples in which a through hole 41 for bolting is provided.
There is not much problem if the chuck roll is used only at room temperature, but in the case of handling at a temperature higher than room temperature, it is necessary to consider the thermal expansion coefficient depending on the temperature. Specifically, the application in which the temperature rises is applied to drying, fixing, solidification and the like of the coating agent applied to the web, and the temperature may be as high as 300 ° C. If the chuck roll members are all made of the same material, this temperature change will not be a problem. However, when there are multiple materials such as ceramics, iron, stainless steel, and organic matter, the thermal expansion between the members due to thermal expansion in the length direction of the roll. The difference becomes a problem. Since the size is limited in the radial direction, there is little problem unless the diameter is very large.
As an example, the surface layer portion is a silicon carbide ceramic having a thermal expansion coefficient of 4 × 10 ⁻⁶ (K ⁻¹ ), the central axis is 13 × 10 ⁻⁶ (K ⁻¹ ) stainless steel, and the length is 2000 mm. Consider a chuck roll whose temperature is increased to 200 ° C. The difference in thermal expansion coefficient between them is 9 × 10 ⁻⁶ (K ⁻¹ ), and the temperature change is 175 (K) from room temperature (25 ° C.). In this case, the difference in elongation due to thermal expansion is 3.15 mm, which is a value that ensures peeling and breakage when both (1) and (2) are firmly joined also in the length direction of the roll. is there. The chuck roll of the present invention is not constrained by using (5) for one end face, even when the relative lengths of the central axis (1) and the porous intermediate (2) are changed. No peeling or destruction occurs.

  By manufacturing the chuck roll with the members shown in (1) to (5) described above, the chuck surface can be uniformly adsorbed and can be used without problems even when there is a temperature change during use, and the cost is low. A chuck roll that can be manufactured can be obtained.

According to the second aspect of the present invention, the structure described in (5) that moves relative to (1) and maintains a sealed state is provided in a portion closer to the end of the chuck roll than (5). The chuck roll according to claim 1, wherein the chuck roll has a structure movable by expansion and contraction of the elastic body. This schematic diagram is shown in FIG. As described above, although (1) and (2) are fitted to each other so as to be movable, they are not joined. There is no. However, it should be avoided that the outer diameter of (1), the inner diameter of (2), and the gap of (5) are left open. As a countermeasure against this, it is desirable to have a structure in which (5) is pressed in the direction of (4) with a constant pressure. The simplest and least expensive method is to press (5) toward the center of the chuck roll using the elastic body 51 provided on the end side of the chuck roll from (5). Since the elastic body can expand and contract, (1) and (2) can move relatively in the length direction of the roll within the range of expansion and contraction. The elastic body is not particularly limited, but a heat resistant resin such as silicon rubber or PTFE that can be used even at high temperatures is preferable. When the elastic body is pressed, it also serves to prevent leakage that may occur between (1) and (5). Further, when the heat resistance is not sufficient even with the organic material as described above, a structure in which cooling water is allowed to flow through (5) or 52 can be employed.

According to a third aspect of the present invention, there is provided the chuck according to the first or second aspect, wherein the (3) includes a plurality of cylinders, and the end portions are bonded and integrated, or are closely adhered without a gap. It is a roll. A schematic diagram at the time of this bonding is shown in FIG. 21 is a cylinder before adhesion of the end faces, and 22 is a joined cylinder. Reference numeral 23 denotes an adhesive surface between the cylinders. Bonding is more advantageous in terms of strength, but bonding is more preferable in terms of uniformity of adsorption, and can be selected according to the application. In any case, the advantages of creating (3) from a plurality of cylinders are described below.
Compared with (3) manufactured as one cylinder, the advantages in use are exactly the same. On the other hand, a structure in which a plurality of cylinders are joined together by bonding has an advantage that manufacturing is easier and manufacturing costs are lower than a structure in which one cylinder is formed. There are various difficulties in making a long cylinder. First, it is difficult to obtain a molded body, and an apparatus corresponding to the length is required. A device such as a lathe capable of machining an appropriate length is also required for intermediate machining. In the case of degreasing and sintering, it is necessary to sinter over a long time in a furnace with a wide soaking part, and long ceramics are easily broken and easily deformed during degreasing and sintering. Considering the yield, manufacturing equipment, handling, manufacturing time, etc., it is much more advantageous to make a plurality of cylinders and bond them together.

The present invention described in claim 4 provides a plurality of cylinders constituting the (3) comprising a joint portion between a plurality of intermediate porous bodies forming the (2) and a plurality of cylinders according to the fifth aspect. The chuck roll according to claim 3, wherein a portion between the seams is not in an overlapping position. For example, in the conceptual diagram of the chuck roll shown in FIG. 1, it is shown that the positions of the adhesive portion 53 of (2) and the adhesive portion 54 of (3) do not overlap.
In both (2) and (3), the bonded part is slightly less than the other part, but the gas flow is hindered. (2) When the adhesive portions in (3) overlap, the possibility of causing a problem in the adsorptivity of the portions is generated, so it is preferable to have a structure that is intentionally shifted.

Although not particularly described in the above description, since (2) and (3) are bonded, it is preferable that the difference in thermal expansion coefficient between the two is small. For this purpose, it is most suitable to manufacture both with the same material. For example, this is a method in which a silicon carbide porous body having a porosity of 50% is used in (2) and a silicon carbide porous body having a porosity of 20% is used in (3). When this is difficult, for example, it is preferable to use two materials whose difference in thermal expansion coefficient is within 1 × 10 ⁻⁶ (K ⁻¹ ).

In the present invention, the following problems can be solved.
(Ii) Even when there is a temperature change during use, the chuck roll can be adsorbed and transported in a good state without being broken, peeled off or distorted.
(B) The web can be adsorbed and conveyed while maintaining a very good surface roughness and strain.
(Ha) The manufacturing cost is kept low.

  The chuck roll of the present invention can be obtained as follows.

First, select the material to be used in (3) according to the usage environment. Important factors are porosity, average pore diameter, heat resistance, chemical reactivity, thermal expansion coefficient, and the like. Appropriate materials are selected according to the purpose. Ceramics are suitable as the material of the porous body, and as oxide-based aluminum oxide, silicon oxide, zirconium oxide, iron oxide, magnesium oxide, nitrides are silicon nitride, aluminum nitride, sialon, titanium nitride, carbides It is preferable to select from materials that are easily available, such as silicon carbide, titanium carbide, tungsten carbide, and chromium carbide.
Compared with materials other than ceramics, the ceramics are suitable for chuck rolls in terms of characteristics such as high wear resistance, low atmosphere and reactivity with the web, and high Young's modulus.

Next, the intermediate porous body (2) is selected. The selection criteria of (2) are that the thermal expansion coefficient is close to (3) and that the average pore diameter and porosity are larger than (3). If the thermal expansion coefficient is not the same as or close to that of (3), when the temperature rises during use, the lengthwise dimensions of (2) and (3) will be separated, and both will be easily peeled off and broken. The difference in thermal expansion coefficient is ideally 0, but there is no problem if it is 1 × 10 ⁻⁶ (K ⁻¹ ) or less. Although (3) is ceramics, the material of (2) is not limited to ceramics, and iron-based metals, alloys between metals, and cemented carbides can be used as long as their thermal expansion coefficients match (3). By making the porosity and average pore diameter of (2) larger than (3), the adsorption and release of (3) and the web can be performed without problems.

The central axis of (1) is preferably made of a material having a Young's modulus of 200 GPa or more, desirably 350 GPa or more and having little deformation. In addition, the shape is a cylindrical shape that is fitted to the extent that it is movable in the roll length direction with respect to (2), but also includes a portion that can be joined to the member of (4). For example, a member that can be bolted with (4) may be provided on the outer peripheral portion by welding or the like, or only that portion may have a large diameter structure, and can be fixed by bolting or welding (see FIG. 2, 2). 3). The shape is basically cylindrical, but as shown in FIG. 7, a gas can be exchanged with (3) by providing a vent hole 61 communicating with an external gas control device in the cylinder. Moreover, it is not limited to a columnar shape, and a cylindrical structure can be used as long as the strength is sufficient.

  The end face member 1 of (4) has a ring shape in which the inner diameter is fitted with (1), and is joined and fixed to (1) at one end face. On the other end face side, (2) and (3) are joined, and (2) and (3) are fixed. This end face member 1 has a role of preventing leakage in the end face direction from (2) and (3). It is preferable to select a dense material that has a ring shape and does not significantly change its shape retention and heat characteristics. Further, since the thickness direction of the ring is not a significant distance, there is little need to consider the coefficient of thermal expansion. This material may be selected from various iron materials, stainless steel, ceramic materials, cemented carbide, high temperature resistant resin such as PTFE, and the like.

(5) is a ring-shaped member in which the inner diameter side is fitted to the central axis, and one side of the end face is coupled to (2) and (3). One end face side is joined and bonded to (2) and (3). This end face member 2 has a role of preventing leakage in the end face direction from (2) and (3). It is preferable to select a dense material that has a ring shape and does not significantly change its shape retention or heat characteristics. In addition, since the length direction of the ring is not a significant distance, there is little need to consider the coefficient of thermal expansion. What applies to the material may be selected from various iron materials, stainless steel, ceramic materials, cemented carbide, high temperature resistant resin such as PTFE, and the like.

  As another requirement, for (2), the parts made separately are bonded to make the length a desired length. For this, grinding of the end face that determines the length and processing with a cylindrical grinder and an internal grinder for determining the inner and outer shapes are performed. The inner diameter side is fitted so that it can be moved in the roll axis direction due to the difference in thermal expansion coefficient of the outer shape of (1).

  In the same way as (2), (3) is joined and integrated with the outer shape of (2) with an adhesive or the like in a dimension in which the outer diameter is provided for the diameter of the roll.

  On the other hand, (1) and (4) are joined together. Next, (1) is inserted into the joined body of (2) and (3) so that the end face is in contact with (4). In this state, the joined body of (2) and (3) is fixed at its end face and integrated with (4). This method may be bonding, or may be a method in which a screw thread is cut in advance and integrated with a bolt or the like, as long as the end face does not leak. When the external gas control device is configured to communicate with (2) (61 in FIG. 1), a through hole (31 in FIG. 5) is made in advance in (4), or a hole is formed after assembly. Can be opened. Next, the other end face of the joined body of (2) and (3) is joined to (5). As long as the end face does not leak, any method can be used.

After finishing the assembly, (1) to (5) are finished with a cylindrical grinder. The chuck roll of the present invention can be obtained by grinding the outer periphery of (3) and finishing it to desired dimensions and surface roughness.
Hereinafter, the present invention will be described in more detail with reference to examples.

The material of each member of (1)-(5) was selected as follows.
(1) SUS430 stainless steel (2) Porosity 50%, average pore diameter 20 μm 95% alumina porous body (3) Porosity 20%, average pore diameter 1.0 μm 99% alumina porous body (4) SUS430 stainless steel (5 ) SUS430 stainless steel The thermal expansion coefficient of the (1) (4) (5) is 13 × 10 ⁻⁶ (K ⁻¹ ),
(2) The thermal expansion coefficient of 7 × 10 ⁻⁶ (K ⁻¹ ) in (3).

  In (1), the flange 2 in FIG. 2 used for joining with (4) was formed by welding. A hole in the longitudinal direction was made in the flange 2 and the tap 3 was cut.

  For (2), 10 rings having the same outer diameter and inner diameter were integrated by bonding, and the end face and inner and outer circumferences were ground and finished. The inner diameter dimension was set to the dimension that fits to the extent that the outer diameter of (1) can be moved in the roll axis direction.

  In (3), four rings having the same outer diameter and inner diameter were integrated by bonding, and end faces and inner and outer circumferences were ground and finished. The gas flowability was ensured by leaving a portion that did not adhere about 20% in area on each bonding surface. The inner diameter was a dimension that allowed for several to several tens of μm of the outer diameter and bonding allowance of (2), and the allowance was left for the outer diameter. The three bonded portions by the four rings were not overlapped with the nine joint portions of the ten rings constituting (2).

  In (4), the inner diameter is the same as the diameter of (1), and the outer diameter is the outer diameter of the chuck roll. In addition, two holes penetrating from the end face were provided to allow ventilation through (3). In addition, a plurality of blind holes were provided separately, and taps were cut on the holes so that they could be firmly bolted to the flange portion of (1).

  (5) makes it possible to fix to the other end face side of (3) with an adhesive and a bolt. Further, a disc-like plate 52 made of silicon rubber is put on the end face side of the chuck roll of (5) so as to be sandwiched between the fixing auxiliary tool 52 movable in the length direction of the roll provided in (1). I made it.

  First, (2) and (3) were integrated by bonding (1) to (5). The application of the adhesive was based on a striped pattern in which a strip-shaped portion that was applied and a strip-shaped portion that was not applied alternately continued, and the adhesion area was about 30% of the entire surface. Next, after joining (1) and (4), the flange 2 and the tap portion (32) of (4) were firmly bolted. Subsequently, (1) was inserted into the integrated inner diameters of (2) and (3), and the parts were integrated with the part except for the through hole part of (4). Further, (5) was fitted to the remaining end portion of (1), and integrated with the end surfaces of (2) and (3) by bonding. Then, a silicon rubber disk 51 was brought into close contact with the end side from (5) and fixed by the fixing auxiliary tool 52 provided in advance in (1).

  Finally, the integrated chuck roll was applied to a cylindrical grinder to finish (3) to a desired outer diameter. Finishing was performed with a # 400 grindstone, and the surface roughness of the finished surface was an arithmetic average roughness Ra of 0.8 μm and a maximum height Ry of 3.0 μm.

  As shown in the conceptual diagram of FIG. 8, the obtained chuck roll was fixed on a support base by bearings (not shown) so that it could be rotated by power 71. In addition, a leak tape was used for the through hole provided in (4), and a joint was connected thereto and connected to an external gas control device 72.

  The chuck roll completed in this way was used for transporting PTFE webs 74 and 75 having a thickness of 50 μm coated with about 10 μm of pigment dispersed in a solvent using a coating tool 73. It should be noted that the environment is an air atmosphere, and the webs 74 and 75 and the chuck roll 70 are used in a dryer maintained at a temperature of 150 ° C. in order to dry and fix the pigment in a short time.

  The chuck roll and other parts were installed before operating the dryer, and after confirming that the chuck roll had no abnormality, the temperature was raised to 150 ° C. as described above. With the conveyance by the chuck roll, the pigment as the coating agent was conveyed by the chuck roll in the course of drying the PTFE sheet as the web. The operation was continued for 10 hours, and the chuck roll and web were checked after cooling.

  As a result, as for the chuck roll, there was no peeling, breakage, scratches, etc. at all locations including the outer diameter surface of (3), and it was in a state completely unchanged from before use. (1) should have expanded more than (2) due to the temperature rise to 150 ° C, but (1) and (2) are only joined via (4) and the length It seems that no problems such as peeling or cracking occurred because the directions were not bound to each other. In the case of (3) in contact with the web, there was no welding of the web or coating agent, nor any wear or discoloration.

Regarding the treated web, the surface of the PTFE sheet was examined, but there was no suction mark by the chuck, and the coating agent was uniformly dried, and there was no problem at all.

It is a figure which shows the typical structure of the chuck | zipper roll of this invention. It is a schematic diagram of the central axis (1) which is a component of the present invention. It is a schematic diagram of the intermediate | middle porous body (2) which is a component of this invention. It is a schematic diagram of the surface layer part (3) which is a component of this invention. It is a schematic diagram of the end surface member 1 (4) which is a component of this invention. It is a schematic diagram of the end surface member 2 (5) which is a component of this invention. It is a figure which shows one example of implementation of the chuck | zipper roll of this invention. An example in which the chuck roll of the present invention is used in a web conveyance process is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Center axis 2 Collar part 3 which joins with end surface member 1 Bolt hole 10 for joining with end surface member 1 Intermediate porous body 11 which integrated several porous rings by adhesion | attachment Single porous body ring 12 Ring-to-ring joint 20 Surface layer 21 to which two or more cylinders are bonded 21 Single cylinder 22 before bonding Bonded cylinder 23 Cylindrical bonding 30 End surface member 1
31 A vent passage 32 leading from the end face member 1 to the intermediate porous body A blind bolt hole 40 for joining the end face member 1 and the central axis 2 end face member 2
41 Bolt hole 50 for integrating with the intermediate porous body One schematic diagram of the chuck roll of the present invention 51 Elastic body 52 Fixing aid 53 Adhesive portion 54 between rings constituting the intermediate porous body Between cylinders constituting the surface layer portion Bonding portion 55 Communication path 61 with external gas control device Ventilation hole 70 Chuck roll 71 External power 72 External gas control device 73 Application tool 74 Web (before application)
75 Web (after application)
76 Direction of web travel

Claims (4)

A chuck roll that adsorbs and conveys a thin plate-like web at the outer peripheral portion of the roll, and has at least the following members (1) to (3) from the center of the roll toward the surface layer. (4) have (5),
At least one member of the following (1), (4) and (5) is communicated from the inside of the cylinder to the following (3) via (2) below, and the pressure in the chuck roll is controlled by an external gas control device A chuck roll having an air passage for carrying out.
(1) Central axis: A cylindrical central axis that transmits a driving force for rotating the chuck roll from external power to the entire chuck roll, and a central axis having a portion for joining with the following (4).
(2) Intermediate porous body: An intermediate porous body having a continuous open pore formed by joining a plurality of rings provided on the inner diameter side according to the outer diameter of (1) above in the thickness direction of the rings and joining them. A cylindrical intermediate porous body that is a porous body and is bonded and fixed to the following (4) and is not bonded to the above (1) and coaxial with the above (1).
(3) Surface layer portion: a surface layer portion in the circumferential direction of the chuck roll, which is bonded to the outer periphery of (2), adsorbs and holds the web on the outer peripheral surface, and has a porosity and average higher than those of (2). A surface layer portion made of a ceramic porous body having a small pore diameter and continuous open pores.
(4) End surface member 1: A ring-shaped dense body which is joined to (1) and is provided on one end surface of the members (2) and (3) at the same time, and seals one end surface of the chuck roll. End face member to be used.
(5) End face member 2: It is an end face member on the side facing the end face described in the above (4), is a ring-shaped dense body, and the chuck roll end face is bonded to the above (2) and (3). If the lengths of (1) and (2) change relatively due to sealing and thermal expansion, follow (2) and move relative to (1) only in the length direction of the chuck roll. End face member with a structure that keeps the sealed state. The structure described in (5) above, in which the structure that moves relative to (1) and maintains a sealed state is movable by expansion and contraction of an elastic body provided nearer to the chuck roll end than (5) The chuck roll according to claim 1, wherein 3. The chuck roll according to claim 1, wherein (3) includes a plurality of cylinders, and has a structure in which end portions are integrated by adhesion, or end surfaces are in close contact with each other without a gap. A position where a seam portion between a plurality of intermediate porous bodies forming the (2) and a seam portion between a plurality of cylinders constituting the (3) consisting of the plurality of cylinders according to claim 3 overlap. The chuck roll according to any one of claims 1 to 3, wherein the chuck roll is not present.

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