JPH079310A - Grinding method and grinding device of elastic roll - Google Patents

Abstract

PURPOSE:To provide a grinding device which can grind an elastic roll safely, automatically, and accurately, in a short time, without removing the elastic roll from the intrinsic operational member, by using the grinding device as a grinding device to restore a damage generated on the surfaces of various elastic rolls including a packing roll and the like. CONSTITUTION:Near a roll 1 having a surface layer 1a which consists of an elastic material, a screw shaft 3 is provided parallel to the roll shaft of the roll 1, a rotating drive means to rotate the screw shaft 3 regularly and reversely is provided, and a grinding member 2 having a grinding surface 2a which can be abutted to the roll surface is installed to a moving means 5 to move parallel to the roll shaft by the rotation of the screw shaft 3 being screwed to the screw shaft 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention polishes the surface of an elastic roll which is interposed in the transfer process of various sheet-like substances, including backing rolls used in the coating section of various coated papers and coated sheets. The present invention relates to a polishing method and a polishing apparatus for smoothing and smoothing.

[0002]

2. Description of the Related Art Generally, in a coating section such as a blade coater or a roll coater in a process of manufacturing various coated papers, a base paper is continuously run through a backing roll having a rubber lined surface, and a blade is applied to the surface. Coating is performed by pressing the coating roll or coating roll with a predetermined contact pressure. However,
Both sides of the base paper contact the same position on the surface of the backing roll until the application of one roll of base paper is completed, and the surface of the backing roll always has a step corresponding to the paper thickness at this contact part. Since the pressing force is continuously applied at, the side surface edge of the paper causes scratches on the rubber surface. And
If the base paper having a wider paper width than the previous one is applied with such scratches, uneven coating or streaks are generated in the scratched portions and the coating quality is deteriorated.

Therefore, when changing the paper width of the base paper to be applied by the same coater, in order to avoid the influence of the scratches on the surface of the backing roll, the coating is performed in order from the widest paper. However, finally, the surface of the backing roll is polished to remove scratches and reused. Further, the surface of the backing roll may be abruptly damaged due to a paper-cutting accident during coating, etc., in addition to the above-described normal damage due to the side edge of the paper, and in this case, polishing is also required.

In the prior art, the backing roll was removed from the coater for the above-mentioned polishing and replaced with a spare roll that had been polished, and the removed backing roll was carried to a department having polishing equipment such as a roll grinder.
Therefore, it was usual to perform mechanical polishing. In addition, depending on the degree of scratches, the person in charge may manually polish the scratches with sandpaper without removing the backing roll.

[0005]

However, the blur
Since the backing roll used for a do coater, roll coater, etc. is large and heavy, the conventional means for mechanically polishing it is detached from the coater, replaced with a spare roll, and between the coating section and the polishing section. There is a problem that it takes a lot of time and effort to carry and set the polishing apparatus in the polishing unit in the transportation and polishing section, and a great deal of labor and time are spent. In addition, with the manual method, sandpaper is pressed against the surface of the rotating backing roll, so the risk of entanglement is high, a high degree of skill is required for the work, and the entire width of the roll is kept constant until it is polished. Since it is extremely difficult to maintain the pressing force, there is a drawback that the polishing accuracy is deteriorated.

[0006] In view of the above situation, the present invention provides a short-term process for repairing scratches on the surface of various elastic rolls including the above-mentioned backing roll without removing the roll from its original working part. It is an object of the present invention to provide a polishing method and a polishing apparatus capable of polishing a surface with high accuracy and safely and automatically and removing scratches.

[0007]

In order to achieve the above-mentioned object, a method for polishing an elastic roll according to claim 1 of the present invention comprises:
While rotating the roll 1 having the surface layer 1a made of an elastic material in the original working part A of the roll, by pressing the abrasive surface 2a of the polishing member 2 moving at a constant speed in parallel with the roll axis to the roll surface, The structure is characterized in that the surface of the roll 1 is polished.

For the same purpose, the second aspect of the present invention is provided.
In the polishing apparatus for elastic rolls according to the present invention, a screw shaft 3 is disposed in the vicinity of the roll 1 having a surface layer 1a made of an elastic material in parallel with the roll shaft, and the screw shaft 3 is rotated in a forward or reverse direction. A driving means 4 is provided, and a polishing member 2 having an abrasive surface 2a capable of contacting the roll surface is attached to a moving member 5 which is screwed onto the screw shaft 3 and moves parallel to the roll shaft by its rotation. It adopts the following configuration.

According to a third aspect of the present invention, in the polishing apparatus according to the second aspect, the moving member 5 is slidably held by a sliding guide bar 6 arranged in parallel with the screw shaft 3. It was adopted.

The claim 4 of the present invention is the above claim 2 or 3.
In the polishing apparatus, the polishing member 2 is composed of a polishing tool body 20 having a polishing surface 2a and a holding frame 21 thereof, and the polishing tool body 20 swings on the holding frame 21 in a plane including the moving direction of the moving member 5. It adopts a structure that is movably and pivotally supported.

According to a fifth aspect of the present invention, in the polishing apparatus according to any one of the second to fourth aspects, the moving member 5 is provided with a support rod 7.
Is pivotally attached at one end side so as to be swingable in the direction of contact with and away from the roll surface, and the polishing member 2 is variably attached to the attachment position through the support rod 7 in the longitudinal direction of the support rod 7. It was done.

[0012]

According to the polishing method of claim 1, the polishing surface 2a of the polishing member 2 that moves at a constant speed in parallel with the roll axis is pressed against the surface of the roll that is rotating in the original operating part, Since the surface of the roll 1 can be polished, there is no need to remove the roll from the operating part and replace it with a spare roll as in the case of performing conventional mechanical polishing, or carry the removed roll to a department having polishing equipment. Required polishing can be done in a short time. Also, because it is automatic polishing, no skill is required,
Highly accurate polishing can be performed safely.

In the polishing apparatus of claim 2, the screw shaft 3
When the polishing member 2 held by the moving member 5 moves in parallel with the roll shaft, the roll width is automatically driven by rotating the roll shaft 1 while rotating the screw shaft 3. Highly accurate polishing can be performed evenly over.

In the structure of claim 3, the load of the moving member 5 and the polishing member 2 is supported by the sliding guide bar 6 and is not applied to the screw shaft 3, so that the moving member 5 and thus the roll shaft of the polishing member 2 are supported. The movement stability in the direction is improved, the sliding contact state between the polishing surface 2a and the surface of the backing roll 1 is also stabilized, and the polishing member 2 of the polishing member 2 is less likely to jump or vibrate.

In the structure of claim 4, since the polishing tool body 20 is pivotally supported by the holding frame 21 of the polishing member 2 so as to be swingable in a plane including the moving direction of the moving member 5, the polishing tool body 20 is When a roll is caught in the axial direction of the roll while sliding on the surface of the roll, the polisher body 20 is prevented from catching on the roll, thereby preventing the roll from being caught in the roll. .

According to the structure of claim 5, since the polishing member 2 can be displaced in the separating / contacting direction with respect to the roll surface by swinging the support rod 7, for example, the rotation axis of the roll swings or the sliding guide portion vibrates. Even if the pressure is applied, the sliding contact pressure of the grinding surface 2a with respect to the roll surface is little changed, and an excessive pressing force does not act on the roll surface, resulting in a stable polishing state. Further, since the mounting position of the polishing member 2 can be adjusted in the longitudinal direction of the support rod 7, the sliding contact position of the polishing member 2 with respect to the roll surface can be arbitrarily set.

[0017]

1 to 3 show an embodiment in which a polishing apparatus of the present invention is applied to a backing roll 1 of a blade coater A. As shown in FIG. 1, in this blade coater A,
The convex shaft portions 1b, 1b of the backing roll 1 are attached to the bearing portions 8, 8
Brackets 9a and 9b are respectively erected on pedestals 9 and 9 on both left and right sides which are horizontally supported by a backing roll 1 between the brackets 9a and 9b. Is installed in parallel with the roll shaft of the screw shaft 3, and a timing belt 4b is wound between a pulley 3a on one end side of the screw shaft 3 and a pulley 4a of a variable speed reversible motor 4 mounted on a bracket 9a on one side. Thus, the screw shaft 3 is set so as to be able to rotate normally and reversely at an arbitrary rotation speed. The backing roll 1 has a surface layer 1a made of a rubber lining, as shown in FIG.

As shown in FIGS. 2 and 3, the sliding guide bar 6 comprises a rectangular metal frame 6a and a guide rail 6b fitted and fixed to the lower portion of the metal frame 6a. The moving member 5 is slidably held by 6b. In this moving member 5, a hanging frame portion 5b engaged with a guide rail 6b and a nut portion 5c screwed onto the screw shaft 3 are integrally fixed to an upper portion of a downwardly open U-shaped main body frame 5a. , And moves in parallel with the roll axis of the backing roll 1 as the screw axis 3 rotates. As shown in FIG. 3, fitting grooves 10, 10 that are open to the front are provided on the inner surfaces of both sides of the body frame 5a.
A pin hole 11 penetrating in and out is formed at the innermost position of the main body frame 5a, and a substantially C-shaped lock piece 12 is pivotally attached to the outer surface on one side of the main body frame 5a. Reference numeral 12a is a set handle for tightening the lock piece 12 so as not to rotate.

Reference numeral 7 denotes a support rod for attaching the polishing member 2 to the moving member 5, which is in the form of a vertical strip plate bent in a substantially V shape, and has a pipe-like attachment portion 13 fixed to its upper end and a lower end to its lower end. The grips 14 projecting to both the left and right sides are fixed, and both ends 13a, 13a of the mounting portion 13 having a small outer diameter are fitted into the fitting grooves 10, 10 of the moving member 5 so that the mounting portion 13 and both The mounting pin 15 is inserted into the pin holes 11 and 11, and the lock piece 12 is engaged with the locking groove 15a to set the handle 1.
By tightening 2a, the moving member 5 can be connected to the backing roll 1 so as not to be pulled out and to be swingable in the contact / separation direction.

The polishing member 2 includes a polishing tool body 20 integrally formed with a connecting convex portion 20b at the center of the upper surface of a base plate 20a, and a downwardly open U-shaped holding frame 2 through which an upper portion 7a of a support rod 7 is inserted.
The connecting convex portion 20b of the polishing tool body 20 is fitted to the forked portion of the holding frame 21, and the connecting pin 22 is inserted into the fitting portion. The connecting pin 22 is non-rotatable with respect to the polishing tool body 20 and rotatable with respect to the holding frame 21, whereby the polishing tool body 20 is supported by the support rod 7.
It is possible to swing in a plane orthogonal to, that is, in a plane including the moving direction of the moving member 5, and at the same time, the set bolt 23 screwed to the holding frame 21 is fastened to the connecting pin 22 so as not to swing. it can. Further, the holding frame 21 can be moved along the upper portion 7a of the support rod 7 by loosening the fixing bolts 21a, 21a, and the upper portion 7a of the support rod 7 can be moved.
Can be fixed at any position.

In the polishing tool body 20, the lower surface side of the base plate 20a forms a concave curved surface corresponding to the peripheral surface of the backing roll 1,
Sandpaper 25 is superposed on the lower surface side with an elastic layer 24 made of a soft foam of rubber or synthetic resin or the like interposed therebetween, and the front and rear ends of the sandpaper 25 are pressed down by the pressing plates 26, 26.
And the mounting screws 2 on the upper surface of the front and rear ends of the base plate 20a.
The lower surface side constitutes the grinding surface 2a by being fastened with 7, 27.

As shown in FIG. 2, the lower portion 7a of the support rod 7 has engaging recesses 16 ... Formed on the upper edge thereof at regular intervals, and has a substantially U-shaped weight 17 with a handle 17a. The set handle 19 is tightened and fixed in a state in which the locking pins 18, 18 fixed to the inner bottom portion are engaged with the engaging recesses 16, 16 at two places.

In the above construction, the supporting rod 7 is detached from the moving member 5 in a normal operating state in which the base paper is coated by the blade coater A. Then,
When it is necessary to repair the scratch generated on the surface layer 1a of the backing roll 1 by polishing, the supporting rod 7 is connected to the moving member 5 and the polishing member 2 held by the supporting rod 7 is supported. Secure it in place on the upper part 7a of the rod 7,
If necessary, the weight 17 is fixed to the lower part of the supporting rod 7 by being fitted over the required position. At this time, the moving member 5 is previously positioned on one end side of the sliding guide bar 6.

Next, the support rod 7 is lifted by the handle 14, and the backing roll 1 is rotated at a low speed in a state where the polishing surface 2a of the polishing member 2 is separated from the surface of the backing roll 1. Then, the supporting rod 7 is released and the polishing surface 2a of the polishing member 2 is brought into sliding contact with the surface of the backing roll 1 by its own weight, and the rotation speed of the backing roll 1 is increased to a rotation speed suitable for polishing.
The screw shaft 3 is rotationally driven. As a result, the moving member 5 moves in parallel with the roll axis, and along with this, the surface layer 1a of the backing roll 1 is polished by the polishing surface 2a of the polishing member 2 and the scratches are removed. When the moving member 5 reaches the other end side of the sliding guide bar 6, the screw shaft 3 may be reversely rotated and the moving member 5 may be folded back in the opposite direction. Therefore, the normal repair of the scratch is required only to reciprocate the moving member 5, that is, the polishing member 2.

In the above polishing, since the polishing surface 2a is pressed against the surface of the backing roll 1 with a constant load and moves in the roll axial direction at a constant speed, the surface layer 1a is uniformly polished over the entire surface, There is no risk of unevenness or fluctuations in the polishing depth in the roll axis direction. Further, since the polishing member 2 can be displaced in the separating / contacting direction with respect to the roll surface by swinging the support rod 7, for example, even if the rotation axis of the backing roll 1 is swung or vibration is applied to the sliding guide portion, etc. 2a
The fluctuation of the sliding contact pressure with respect to the roll surface is small, an unreasonable pressing force does not act on the roll surface, a stable polishing state is secured, and high polishing accuracy is obtained. Further, in the configuration of the above embodiment, since the elastic layer 24 is interposed between the base plate 20a of the polishing tool body 20 and the sandpaper 25, the abrasive surface 2a elastically presses against the surface of the backing roll 1 and A stable polishing state with less vibration is obtained. If the sandpaper 25 becomes clogged, it is necessary to replace it with a good abrasive surface 2
a It can be reproduced repeatedly.

However, if the polishing tool body 20 of the polishing member 2 is set to be swingable on the holding frame 21, the polishing surface 2
In the process in which a moves in the roll axial direction while slidingly contacting the backing roll 1, it is difficult for the backing roll 1 to be caught or bite into the surface of the backing roll 1 due to the escape of the polishing tool main body 20 due to the swinging of the polishing tool main body 20. Uneven polishing such as excessive abrasion is avoided, and higher polishing accuracy can be obtained. Also, if necessary, in order to avoid catching or biting on the front edge side in the movement of the grinding surface 2a in the roll axis direction, the polishing tool body 20 is held in a state in which the movement front edge side thereof is slightly floating from the surface of the backing roll 1. It is also possible to fix it to the frame 21. Further, depending on the material of the surface layer and the degree of scratches, the support rod 7 may be pressed by hand to increase the pressing force against the backing roll 1.

By the way, a diameter of 965 mm and a length of 2150 m with a thickness of 25 mm and a rubber lining having a hardness of 65 to 75 degrees are applied.
For the backing roll 1 of m, the sandpaper 25 of the polishing member 2 of # 400 is used, and the polishing tool body 20 can be swung without being fixed to the holding frame 21 and the weight 17 is not attached. The rotation speed of the backing roll 1 is 16 rpm when the polishing surface 2a is in contact with the polishing surface 1
When polishing was performed by one reciprocation of the moving member 5 under the setting conditions of 00 rpm and the feeding speed of the moving member 5 of 530 mm / min, the scratches on the surface of the backing roll 1 disappeared completely during the coating process. The time required during this period is 10
It was about a minute. And the backing roll 1 after polishing
It was confirmed that the surface of No. 2 had an average surface roughness of 6 μm or less as measured by a surface roughness meter and was in a very good finished state.

The support rod 7 is a weight 17 in the above embodiment.
Although it is a structure that can be attached and pressed by hand, it may be a short one composed of only the upper portion 7a. Sandpaper 25 is provided on the polishing surface 2a of the polishing member 2.
Other materials may be used, and in order to press the abrasive surface 2a against the surface of the backing roll 1, only the self-weight of the polishing member 2 and the supporting rod 7 may be used, or an appropriate weight may be added. Alternatively, a structure in which a spring or an air cylinder is used for pressing may be employed. Further, in the present invention, the screw shaft 3
And the arrangement of the sliding guide bar 6, the structure of the polishing member 2, the moving member 5, the sliding guide bar 6, the supporting rod 7, the mutual connecting structure and the fixing structure, etc. Various design changes are possible. Further, the polishing apparatus of the present invention is not limited to a backing roll used in a coating section such as a blade coater or a roll coater in a coated paper manufacturing process, and is interposed in the transfer process of various sheet-like substances including paper. It is applicable to surface polishing of various rolls having a surface layer made of an elastic material.

[0029]

According to the polishing method of claim 1, when repairing the scratches generated on the surface of various elastic rolls intervening in the transfer process of various sheet-like substances such as paper, the roll is used. In a short time without removing it from the original moving part
Moreover, it is possible to safely and automatically polish the surface with high precision to remove scratches.

In the polishing apparatus of the second aspect, the polishing method of the first aspect can be surely carried out with an extremely simple apparatus configuration.

According to the polishing apparatus of the third aspect, the moving stability of the moving member, and thus the polishing member, in the roll axis direction is improved,
The polishing member is unlikely to jump up or vibrate during polishing, and high polishing accuracy can be obtained.

According to the polishing apparatus of claim 4, when the polishing surface moves in the axial direction of the roll while being in sliding contact with the roll, it is difficult for the polishing surface to be caught or bite into the surface of the roll.
It is possible to avoid uneven polishing such as partial excessive cutting due to these factors, and to obtain higher polishing accuracy.

According to the polishing apparatus of the fifth aspect, even if the rotation axis of the roll is swung or the sliding guide portion is vibrated,
An unreasonable pressing force does not act on the roll surface, a stable polishing state is obtained, and the sliding contact position of the polishing member with respect to the roll surface is adjusted according to operability, roll size, equipment conditions around the roll, and the like. There is an advantage that you can.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment in which a polishing device of the present invention is applied to a backing roll of a blade coater.

FIG. 2 is a sectional view taken along the line II-II of FIG.

FIG. 3 is an exploded perspective view of a main part of the polishing apparatus.

[Explanation of symbols]

 1 Backing Roll (Roll) 1a Surface Layer 2 Polishing Member 3 Screw Shaft 4 Reversible Motor (Rotation Driving Means) 5 Moving Member 6 Sliding Guide Bar 7 Support Rod 20 Abrasive Tool Body 21 Holding Frame A Blade Coater (original Roll Original) (Operating department)

Claims (5)

[Claims] 1. A roll having a surface layer made of an elastic material is rotated in its original working part while the abrasive surface of a polishing member that moves at a constant speed in parallel with the roll axis is pressed against the roll surface. A method for polishing an elastic roll, which comprises polishing the surface of the roll. 2. A screw shaft is provided in the vicinity of a roll having a surface layer made of an elastic material, in parallel with the roll shaft, and rotation driving means for rotating the screw shaft in the forward and reverse directions is provided. A polishing device for an elastic roll in which a polishing member having an abrasive surface capable of contacting the roll surface is attached to a moving member that is screwed onto the shaft and moves in parallel with the roll shaft by its rotation. 3. The polishing apparatus for an elastic roll according to claim 2, wherein the moving member is slidably held by a sliding guide bar arranged parallel to the screw shaft. 4. The polishing member comprises a polishing tool body having a polishing surface and a holding frame for holding the polishing tool body, and the polishing tool body is pivotally supported on the holding frame so as to be swingable within a plane including the moving direction of the moving member. The polishing device for an elastic roll according to claim 2 or 3. 5. A support rod is pivotally attached to the moving member at one end side so as to be swingable in the direction of contact with and away from the roll surface, and the mounting position of the polishing member can be changed in the longitudinal direction of the support rod via the support rod. The polishing device for an elastic roll according to any one of claims 2 to 4, wherein the polishing device is mounted on the elastic roll.