JPH03256698A - Rubber lining peeling method for roll - Google Patents

Abstract

PURPOSE:To increase the efficiency of a lining peeling work by means of a liquid jet flow by forming a deep groove in a rubber lining layer by means of a high pressure narrow liquid jet flow, and removing parted small pieces by means of a wide jet flow after the small piece is peeled through rotation of a roll. CONSTITUTION:High pressure water is fed with the aid of a high pressure water pump 9, and a narrow jet flow is injected against a rubber lining layer 1d through an injection nozzle 7. Simultaneously, the nozzle 7 is moved throughout the whole length of a roll 1 to form a deep groove B1, extending in the direction of an axis A to a base part 1c, in the layer 1d, and thereafter through rotation of the roll 1 in a 180 deg. arc, the nozzle 7 is moved in a direction E to form a deep groove B2. High pressure water is injected against the layer 1d through the nozzle 7 in a separating position (a) as the roll 1 is rotated at a given speed, the nozzle 7 is continuously moved in a direction D from the one end of the roll 1 to the other end thereof to form a helical deep groove C in the layer 1d. In which case, the layer 1d parted into the deep grooves B1, B2, and C is peeled by means of the central force of the roll 1 and the impact force of a jet water flow and dropped down. A wide jet water flow is collided with a base part 1c through the nozzle 7 to perform washing.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for peeling off a rubber lining applied to the outer peripheral surface of a roll.

BACKGROUND OF THE INVENTION In general, rolls for guiding thin steel sheets into a surface treatment tank or papermaking rolls are provided with a rubber lining.

Conventionally, when removing the rubber lining of such a roll, it was scraped off using a lathe.

Invention or Problem to be Solved By the way, when removing the rubber lining using a lathe,
■When setting the roll on the lathe, centering takes a lot of time and requires skill.

■When removing the rubber lining, the roll itself is slightly scraped, so the roll diameter gradually decreases and the balance of the roll is lost. There were drawbacks such as.

Furthermore, a method of peeling using a jet stream of fluid can be considered, but this method has the problem of extremely low working efficiency.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a method for peeling rubber lining of a roll, which can be performed more efficiently than 13M.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention has a method in which a roll with a rubber lining on the outer circumferential surface of the base is left still, and a narrow high-pressure liquid jet stream is directed from an injection nozzle to the rubber lining layer. At the same time as spraying, move the spray nozzle in the direction of the roll axis,
Deep grooves are formed in the rubber lining layer in the direction of the roll axis extending to the base of at least one roll, and then the rolls are rotated around the axis and a narrow, high-pressure liquid jet stream is applied to the rubber lining layer from an injection nozzle. At the same time as jetting, the jet nozzle is moved continuously or intermittently in the direction of the roll axis,
A spiral or multiple annular deep grooves extending to the base of the roll are formed in the rubber lining layer, the rubber lining layer between the deep grooves is peeled off by rotation of the roll, and a wide liquid jet stream is injected from an injection nozzle onto the roll. The cleaning nozzle is moved in the direction of the roll axis to clean the outer circumferential surface of the base.

According to the above operation, deep grooves extending to the base are formed in the rubber lining layer by using a high-pressure narrow liquid jet flow, and the rubber lining layer is divided into small pieces, and after peeling off these small pieces by rotation of a roll, The wide liquid jet removes residues and adhesives from the rubber lining layer, completely eliminating the disadvantages of conventional lathe peeling methods, such as scraping down to the base of the roll and causing the roll to become unbalanced. Furthermore, since the entire rubber lining layer is not sequentially scraped off using a jet stream of liquid as previously thought, the work can be done in an extremely short time, and the work of rubber lining using a jet stream of liquid can be done efficiently. can be done.

EXAMPLE The method for peeling off the rubber lining of a roll according to the present invention will be explained below with reference to FIGS. 1 to 9.

First, the rubber lining peeling device will be explained with reference to FIGS. 4 to 6. 1 has a shaft part la in both tllA parts.

1b, the outer peripheral surface of the base 1c is coated with a rubber lining layer 1d of a predetermined thickness.

A cover unit 3 capable of accommodating the roll 1 is disposed on the pedestal 2, and within the cover unit 3 is a roll support portion 4A that supports the roll 1 in the horizontal direction and is rotatable.

4B is arranged. On the pedestal 2 at the rear of the cover unit 3, there is a guide frame 6 on which a guide rail 5 is laid along the roll axis entry direction, and a movable frame 6 that is guided by the guide rail 5 and has a jet water injection nozzle 7. Trolley 8
is placed. Furthermore, a high-pressure water pump 9 that supplies high-pressure water to the injection nozzle 7 and a recovery tank 10 that recovers water after injection are disposed within the pedestal 2.

Next, the details will be explained.

The cover unit 3 is provided with an opening/closing door 11 that can be freely opened and closed on the upper surface, and a nozzle insertion opening 12 into which the injection nozzle 7 can be freely inserted along the axial direction A of the roll 1 at a position directly above the roll axis A of the opening/closing door 11. An opening is formed at the bottom, and the right side of the drawing is tilted downward. There are 1 and 13.

The roll support parts 4A and 4B are formed on the right side in the drawing, the driving side roll support part 4A, and on the left side, the FJ opening side roll support part 4B. That is, in the drive-side roll support section 4A, a pair of front and rear drive rollers 14 that support the roll shaft section 1a from below are disposed on a roller support body 15 via drive shafts 16, and these drive shafts 16 are connected to the cover. The outside l that penetrates 3!
1@ section is interlocked and connected to the roll rotation motor 17 via a chino or sprocket. The adjustment side roll support part 4B is
Two adjustment rails 19 are hung between a pair of left and right supports 18A and 1.9B that are arranged at a predetermined interval in the roll axis entry direction. A movable body 21 having a pair of front and rear driven rollers 20 capable of rotatably supporting the roller 1b is movably disposed.

Then, an adjustment ball screw shaft 22, which is disposed between the adjustment rails 19 between the supports 17A and 17B and into which the female threaded portion 21a of the movable body 21 is screwed, is rotationally driven by an adjustment motor 23 on the outside of the cover unit 3. The driven roller 20 is configured to be movable and adjustable in the roll axis entry direction in accordance with the length of the roll.

The movable cart 8 has guide rails 5 mounted on a cart frame 24 movably disposed on a pair of left and right guide rails 5.
A female threaded portion 24a is provided which is screwed into a ball screw shaft 25 for moving the nozzle disposed between the two, and the movable cart 8 is reciprocated by a nozzle moving motor 26 that rotates the ball screw shaft 25 in the forward and reverse directions at the end. Constructed to be movable. Further, a support 27 is erected on the truck frame 24, and an elevating frame 29 that can be raised and lowered by being guided by a nozzle elevating ball screw shaft 30 that is vertically attached to the support 27 projects above the cover unit 3. . At the base end of this elevating frame 29,
Female threaded portion 29 screwed into the ball screw shaft 30 for nozzle elevation
a is arranged and prevented from rotating, and the ball screw shaft 3
The elevating frame 29 is raised and lowered by the nozzle elevating motor 31 that rotates the 0 at the lower end in forward and reverse directions, and the injection nozzle 7 attached to the elevating frame 29 via the support member 32 is positioned directly above the roll axis A. It can be raised and lowered. The injection nozzle 12 is a single unit, and the injection direction is aligned with the roll axis A.
As shown in FIG. 1, it is used at a cutting position a close to the rubber lining layer 1d of the roll 1 and at a cleaning position at a predetermined ratio MH. Also, inside the kite frame 6, a cable drag chain 33 is housed, which houses a water absorption hose that supplies high-pressure water from the high-pressure water pump 9 from the movable cart 8 to the injection nozzle 7, and a cable that supplies power to the nozzle lifting motor 31. is installed.

A recovery tank 1 is located at the lower part of the slope 13 at the bottom of the cover unit 3.
The drain pipe 34 that connects to 0! # Continued, recovery tank 10
The water and the rubber lining layer are separated by a screen or the like, and the water is sent to the high-pressure water pump 9 again.

Incidentally, as shown in FIG. 7(a), the momentum distribution of the jet fluid in the air changes from a bell-shaped shape to a flat bell-shaped shape as it moves away from the nozzle lower a. Therefore, as shown in FIG. 7(b), when the jet stream is applied to the rubber lining layer 1d at a position close to the nozzle lower a, a large cutting depth can be obtained although the cutting width W1 is small. Also,
As shown in FIG. 7(C), W2, which expands in the diene t- as it moves away from the nozzle lower a, is divided into a dynamic component of the sound force induced by the jet stream (the sound force is a static component due to momentum, It is known that the dynamic component caused by the collision of droplets increases and reaches a maximum value at a certain distance.

Utilizing such properties of the jet flow, as shown in Fig. 1, the injection nozzle 7 is set at a separation position a close to the rubber lining layer 1c, and a narrow, high-pressure jet flow is applied to the rubber lining layer 1d. The rubber lining layer 1d is made to collide with the rubber lining layer 1d to form narrow deep grooves B1, B2, and C extending to the base 1c, and the rubber lining layer d is divided into small pieces. Peel and separate.

Then, the injection nozzle 7 is set at a cleaning position away from the rubber lining layer 1d to a position where the dynamic component is maximum,
A cleaning operation is performed in which a wide jet stream impinges on the rubber lining layer 1d to peel off and remove thin rubber lining residue and adhesive remaining on the base IC of the roll 1. 3. Here, the relationship between the amount of erosion to the rubber lining layer 1d and the distance of the injection nozzle 7 varies depending on the diameter of the nozzle, and is approximately as shown in FIG. 8.

Next, a method for peeling off the rubber lining in the above embodiment will be explained.

First, the movable body 21 is moved by the adjustment motor 23, and the driven roller 20 is moved in accordance with the length of the roll 1 to be peeled.
Adjust the position. Then, the roll 1 is put into the cover unit 3, and the shaft parts 1a and 1b are placed on the driving roller 14 and the driven roller 20, respectively, to support the roll. Then, the nozzle lifting motor 31 is driven to lower the lifting frame 29, and the injection nozzle 7 is connected to the rubber lining layer 1d of the roll 1.
Set at separation position a approaching . Next, high-pressure water is supplied from the high-pressure water pump 9, and a high-pressure, narrow-width jet water stream is injected from the injection nozzle 7 onto the rubber lining layer 1d, and the nozzle moving motor 26 is driven to move the moving table 8 in the direction of the arrow. The injection nozzle 7 is moved over the entire length of the roll 1 to form a deep groove B1 in the direction of the roll axis hole extending to the base IC in the rubber lining layer 1d. Further, the roll rotation motor 17 rotates the roll 1 by 180 degrees to move the injection nozzle 7 in the direction of arrow E, thereby forming a deep groove B2 at a position symmetrical to the deep groove B1. Note that three or more of these deep grooves B may be formed.

Next, the nozzle rotation motor 17 is driven to drive the drive roller 14.
While the roll 1 is rotated at a predetermined speed through the pump, high pressure water from the high pressure water pump 9 is injected from the injection nozzle 7 at the separation position a toward the rubber lining layer 1d. and,
The nozzle moving motor 26 is driven to continuously move the injection nozzle 7 from one end of the roll 1 to the other end in the direction of the arrow. As a result, the rubber may be moved and a large number of annular deep grooves C' may be formed in the rubber lining layer 1d. Deep groove BIB like this
2. When C is formed, since the roll 1 is rotating, the rubber lining layer 1d separated by the deep grooves B, B2, and C peels off and falls due to its centrifugal force and the impact force of the jet water flow. .

Furthermore, when the injection nozzle 7 reaches the other end of the roll 1, the injection nozzle 7 is raised by the nozzle lifting motor 31 and set at a cleaning position a predetermined distance away from the roll 1. Then, a wide jet water stream is caused to collide with the surface of the base IC from the spray nozzle 7 and move in the direction of the arrow E to remove the residue of the rubber lining layer 1d, adhesive, etc. remaining on the outer peripheral surface of the base IC, and perform the cleaning operation. conduct.

Here, an experimental example will be explained with reference to FIG.

Length: L = 1100 (1, outer diameter: D = 30
0 rm, thickness of rubber lining layer 1d: d2-15r
m, hardness of rubber lining layer IC = H, roll 1 of A70, diameter = 1.3 mmφ, pressure = 1000 kg /
The peeling operation was performed using the Ci injection nozzle 7.

Here, the deep groove B1 in the separation operation. B2, distance between the injection nozzle 7 and the roll 1 when forming C: a20 distance, moving speed of the injection nozzle 7: V1 = 260 m, /nin, o-
Number of revolutions of roll 1: R1 = 30r, p, n (deep groove C only) Distance between spray nozzle 7 and roll 1 during cleaning work:
b = 220 +u+, moving speed of injection nozzle 7: V
2 = 38m+/min -0-Rotation speed of R1 = 2
5r, ρ1.

According to the above experiment, it is almost the same as peeling work using a lathe.
The rubber lining layer 1d could be reliably peeled off in about 0 minutes. Therefore, the problem of peeling off the rubber lining layer 1d with a lathe is solved, the life of the base 1c is semi-permanent, and the balance of the roll 1 is not lost.

In the above embodiment, the injection nozzle 7 was provided independently to adjust the positions 31a and 31b relative to the rubber lining IC.
As shown in the figure, two injection nozzles 7A and 7B are arranged in the nozzle head at a predetermined interval in the direction of the roll axis A, and the front of the moving direction F approaches the rubber lining layer 1c and is used at the separation position a. A cleaning spray nozzle 7B is used at a cleaning position 2b located a little distance from the rubber lining layer 1d at the rear in the moving direction F. Thereby, the jet water stream can be ejected from both the injection nozzles 7A and 7B at the same time, and the separation operation and the cleaning operation can be performed at the same time. Therefore, the peeling work that required one movement of the injection nozzle 7 f3j can be completed by only one movement, and work efficiency can be greatly improved.

Effects of the Invention As stated above, according to the present invention, high pressure and narrow width ? l
A jet stream is used to form deep grooves extending to the base of the rubber lining layer, dividing it into small pieces, and these pieces are peeled off by rotating rolls, and then a wide liquid jet stream removes residue and adhesive from the rubber lining layer. Therefore, the drawbacks of the conventional peeling method using a lathe, such as the problem that the base of the roll is scraped and the roll becomes unbalanced, can be completely solved. Moreover, unlike conventional methods, the entire rubber lining layer is not scraped off with a liquid jet stream, so the work can be done in an extremely short time, and the rubber lining peeling process using a liquid jet stream is more efficient. 6

[Brief explanation of drawings]

1 to 9 show one embodiment of the present invention, FIGS. 1 to 3 are perspective views and front views showing the rubber lining id1M work for a roll, respectively, and FIGS. 4 to 6 show a rubber lining operation, respectively. A front cross-sectional view, a left side cross-sectional view, and a plan cross-sectional view showing the lining stripping device, Figure 7 iamb) (c) is a diagram showing the motion distribution of the jet fluid, and Figure 8 is a diagram showing the diameter, distance, and amount of erosion of the injection nozzle. A graph showing the relationship, FIG. 9 is an explanatory diagram of an experimental example, and FIG. 10 is a partially cutaway front view showing another experimental example of the injection nozzle. 1... Roll, la, lb,... Shaft, 1d...
Base, 3... - cover integrated, 7... injection nozzle, 8...
- Moving trolley, 9... High pressure water pump, 14... Drive roller, 17... Roll rotation motor, 20... Followed roller, 25... Ball screw shaft for nozzle movement, 26...
・Nozzle movement motor, 30... Ball screw shaft for nozzle elevation, 31... Nozzle movement motor, A... Roll axis center, B1, B2... Deep groove, c, c'... Deep groove, a
... Separation position, b... Washing position.

Claims (1)

[Claims] 1. Place the roll with rubber lining on the outer peripheral surface of the base, and inject a narrow, high-pressure liquid jet flow from the injection nozzle onto the rubber lining layer, and move the injection nozzle in the direction of the axis of the roll to inject the rubber lining. A deep groove is formed in the layer in the direction of the roll axis extending to the base of at least one roll, and then the roll is rotated around the axis, and a narrow, high-pressure liquid jet stream is injected from an injection nozzle onto the rubber lining layer. At the same time, the injection nozzle is continuously or intermittently moved in the roll axis direction to form a spiral or multiple annular deep grooves extending to the base of the roll in the rubber lining layer, and as the roll rotates, the rubber lining layer between the deep grooves is peeled off and fallen off. A method for peeling a rubber lining of a roll, which further comprises spraying a wide liquid jet stream from a spray nozzle onto the roll and moving the spray nozzle in the axial direction of the roll to clean the outer circumferential surface of the base.