JPH0557225A - Coating method by coater roll with groove and apparatus therefor - Google Patents

Abstract

PURPOSE:To obtain a coating method and an apparatus by a coater roll with a groove by engaging a shaping metallic material with a similar shape to a rubber roll groove with the rubber roll groove and operating by pressing it. CONSTITUTION:The shaping metallic material 3 uses a wear-resistant hard metal and the groove shape is similar to the groove 2c of the rubber roll and a proper number of mountains are provided and it traces the groove 2c of the coater roll 2, but it is needed that the phase is hardly shifted even by tracing repeatedly and also the pressing force is kept always in an adequate range. When a roll rotation angle is a notched point angle at a position of a double number L1 of a groove pitch from a roll end face, based on the roll rotation angle and the horizontal traveling position which the forming metallic material 3 coincides with the notched point P0 of the groove of the coater roll 2 end face, the deviation S is calculated and the deviation is corrected before it travels horizontally and arrives the notched point P0. Then, with the control under the pressure of the shaping metallic material 3 and the control of phase positioning with the groove 2c of the coater roll 2, the shape of the rubber roll groove is kept for a long period and a uniform coated film 14 is obtained, so that quality can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a squeeze type coating method and apparatus using a grooved coater roll.

[0002]

2. Description of the Related Art A squeeze type coater is a type that is often used unless it has a simple structure and a particularly clean appearance is required. 5 and 6 show an example of the coater of this system. The coating film is controlled by this coater by sandwiching a continuously flowing steel plate 1 with opposing rubber-lined coater rolls 2 and applying a coating liquid 14 supplied to the surface of the steel plate 1 by a spray nozzle 13 provided on the upstream side to a coater roll. It is controlled by the groove 2c formed on the surface of the roll 2 and the pressure applied by the coater roll reduction device 12. 2b is a rubber lining and 2a is an iron core. Further, 11 is a coater roll drive motor.

[0003]

The drawbacks of the above-mentioned conventional coater are that when the roll is worn out, the groove shape changes, making it impossible to control the coating film thickness and the appearance, and the film thickness difference between the plate width direction and the front and back sides. That is, problems such as increase in size and generation of vertical stripes occur. Note that the abrasion rate of the roll depends on the coating speed, but if the speed is economical, generally, frequent roll replacement is required and the operation load is large.

An object of the present invention is to provide a coating method and apparatus using a grooved coater roll that solves the above-mentioned drawbacks of the prior art.

[0005]

The method of the present invention is a squeeze type coating method using a coater roll in which a plurality of grooves are formed on the peripheral surface of a rubber roll, and the groove of the coater roll is formed in the axial direction of the coater roll. Formed into a spiral shape and having a shaping metal object having a ridged blade having the same shape as the groove of the coater roll, is pressed while being matched with each groove of the coater roll, and being repeatedly followed by the groove of the coater roll. It is a coating method using a grooved coater roll.

Further, the apparatus of the present invention is a squeeze type coating apparatus using a coater roll having a plurality of grooves formed on the peripheral surface of a rubber roll, wherein the groove of the coater roll is spirally formed with respect to the axial direction of the coater roll. A shaping device having a ridged blade having the same shape as the groove of the coater roll, which can be inserted into and removed from each groove of the coater roll, and a pressing device for pressing the shaping metal product to the coater roll; A grooved coater row characterized by comprising a traverse device for moving a metal object in parallel with the axis of the coater roll, and a phase control device for repeatedly following the ridged edge of the shaping metal object so as to match the groove of the coater roll. It is a coating device by a tool.

Although the coating surface of the coater roll of the present invention is made of rubber in the specification, a soft elastic material (polymer material) other than rubber can be used because of its compatibility with paints.

[0008]

[Operation] In the conventional coating method, since the groove shape is destroyed by the abrasion of the rolls and the coating control becomes impossible, periodic dressing is required. The shape of the groove is broken because a part of the groove is selectively worn away. Fig. 4 (a) shows a new groove when the groove shape is triangular, and Fig. 4 (b) shows a worn groove.
It shows in comparison with. In the case of the triangular groove, the apex corresponding to the outer diameter of the roll is selectively worn away.

Therefore, in the present invention, a shaped metal article having the same shape as the rubber roll groove is made to match the rubber roll groove and is pressed and operated to forcibly abrade a part of the contour of the rubber roll groove, which wears slowly. The initial shape was maintained. Thereby, the groove shape can be maintained for a long period of time. The forced dressing of the rubber roll groove with the orthopedic metal may be appropriately performed constantly or intermittently.

In the present invention, as shown in FIG. 3, the groove 2c of the coater roll is traced by the shaping hardware 3, but the phase does not shift even if it is repeatedly traced, and the pressing force of the shaping metal 3 is always in the proper range. Must be maintained at. If the phase shifts, the shape of the groove 2c of the coater roll changes, and it becomes impossible to control the coating film thickness.

If the pressing force of the shaping hardware 3 is weak, the effect is lost, and if it is too strong, the rubber is deteriorated or cracked due to frictional heat. Therefore, it is indispensable to control the pressing force of the orthopedic metal and the phase matching control with the groove 2c of the coater roll.
The method of tracing applied the screw processing technology. A virtual spiral portion 2d is set on the end face of the roll, and the phase is matched during simulated tracing of that portion. That is, with reference to the roll rotation angle and the traverse position at which the shaping metal piece 3 matches the cut point P ₀ of the groove of the coater roll end surface, the roll rotation angle is the cut point angle at the position of the multiple L ₁ of the groove pitch from the roll end surface. , The deviation δ is calculated, and the deviation is corrected until the coater roll cutting point (P ₀ ) is traversed and reached.

Since the frictional force and the inertial force of the guide portion of the traversing device cause an error during the correction operation, it is preferable to improve the accuracy by providing a plurality of correction points. The cutting powder generated with dressing may be harmful or harmless depending on the form of the cutting powder, the material of the roll, and the type of coating film. That is, when pressing with a light pressure at all times,
Since the cutting powder becomes a fine powder and is dispersed very thinly in the coating film, there is often no problem. If even a small amount should not be mixed, dressing is performed intermittently, and a trough is provided under the cutting blade to collect all coating fluid containing cutting powder and remove cutting powder.

[0013]

An embodiment of the present invention will be described with reference to the drawings. 1 is a side view of an embodiment of the device of the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is a block diagram of a control device thereof. .. In FIGS. 1, 2, and 3, reference numeral 1 is a steel plate that is an object to be coated. 2 is a coater roll, 2a is an iron core, 2b is a rubber lining, 2c is a rubber lining 2b
It is a spiral groove processed into.

Reference numeral 3 is a shaping metal, which is made of wear-resistant cemented metal, has the same groove shape as the groove 2c of the rubber roll, and is provided with an appropriate number of ridges (for example, 20 ridges). Here, it is important to control the pressing force for pressing the shaping metal piece 3 into the groove 2c of the rubber roll. If the pressing force is too strong, the rubber roll may be deteriorated or cracked due to frictional heat. Further, if the pressing force in the roll cylinder length direction is non-uniform, the abrasion of the rubber roll will be non-uniform, making it impossible to control the application.

In order to prevent this, the shaping hardware pressing device 4
Is provided. Reference numeral 4a is a reduction motor, 4b is a load cell for detecting a reduction force, 4c is a position sensor, and 4d is a table with a slide guide on which a transverse fine adjustment device 6 to be described later is mounted.
In the present invention, as shown in FIG. 3, the groove 2c of the coater roll is traced by the shaping metal piece 3, but it is necessary that the phase does not shift even if it is traced repeatedly. This is because if the phase shifts, the shape of the groove 2c of the coater roll changes, and it becomes impossible to control the coating film thickness.

As the tracing method, a threading technique is applied. A virtual spiral portion 2d is set on the end face of the roll, and the phase is matched during simulated tracing of that portion.
That is, with reference to the roll rotation angle and the traverse position where the shaping metal piece 3 matches the cut point P ₀ of the groove on the end face of the coater roll,
When the roll rotation angle is at the cutting point angle at the position of the multiple L ₁ of the groove pitch from the roll end face, the deviation δ is calculated, and the deviation is calculated before traversing and reaching the coater roll cutting point (P ₀ ). Fix it.

A traverse device 5 is controlled by a speed control device 10 in synchronization with the coater roll drive motor 11. 5a is a traverse motor, 5b is a feed screw, 5c is a guide rod, 5
Reference numeral d is a table with a slide guide on which the shaping hardware lowering device 4 is placed. Reference numeral 6 is a traverse fine adjustment device for performing phase adjustment in the virtual spiral portion 2d, 6a is a fine adjustment motor, 6b is a position sensor,
6c is a table with a slide guide for fixing the shaping hardware 3.

Reference numeral 7 is a rotation angle transmitter of the coater roll. Reference numeral 8 is a position sensor, and 8a is a roll end surface sensor. 8b and 8c are position sensors that are multiples of the groove pitch. In this embodiment, phase matching is performed at two points L ₁ and L ₂ , for example, L ₁ = 50 mm (groove pitch 1 mm × 50),
L ₂ = a 100 mm (groove pitch 1 mm × 100). 8d and 8
e is a sensor that determines the transverse range.

Reference numeral 9 is a rolling force and phase control device. 12
Is a coater roll pressure reducing device, 13 is a spray nozzle for supplying a coating liquid, and 14 is a coating liquid. Excess coating liquid 14 is liquid receiver 20
Received by, returned to the coating liquid tank 17, and circulated by the circulation pump 18. Further, the coating liquid 14 carrying the cutting waste carry-over is returned to the coating liquid tank 17 through the receiving filter 16 by the trough 19. Reference numeral 15 indicates piping.

Since the frictional heat is cooled by the coating liquid, a cooling device is unnecessary. Next, specific examples will be described. In the device of Figures 1 and 2, the diameter is 200mm,
Using an equilateral triangular coater roll 2 with a rubber lining thickness of 20 mm and a groove 2c pitch of 1.0 mm, apply MgO slurry liquid to a steel plate 1 with a plate thickness of 0.2 to 0.5 mm and a plate width of 900 to 1200 mm.
It was applied at 50 to 150 m / min. As a result, the roll life was extended to about 3 times that of the conventional one.

[0021]

As described above, according to the present invention, the shape of the rubber roll groove can be secured for a long period of time, and the operating cost can be greatly reduced. In addition, it is possible to obtain a uniform coating film and improve the quality.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view showing an embodiment of the present invention.

FIG. 2 is a plan view showing an embodiment of the present invention.

FIG. 3 is a block diagram showing an embodiment of a control device of the present invention.

FIG. 4 is a cross-sectional view showing a new groove and a worn groove formed on the rubber lining surface of the coater roll.
4A shows a new product, and FIG. 4B shows a worn product.

FIG. 5 is a sectional view of a conventional squeeze roll coater.

FIG. 6 is a front view of a conventional squeeze type roll coater.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Steel plate 2 Coat roll 2a Iron core 2b Rubber lining 2c Groove 2d Virtual spiral part 3 Shaping hardware 4 Reduction device 4a Reduction motor 4b Load cell 4c Position sensor 4d table 5 Traverse device 5a Traverse motor 5b Feed screw 5c Guide 5d table 6 Traverse fine adjustment device 6a the fine motor 6b position sensor 6c table 7 the angle transmitter 8 position sensors 8a roll end surface sensor 8b L ₁ position sensor 8c L ₂ position sensor 8d traverse range sensor 8e traverse range sensor 9 pressure and the phase control unit 10 speed controller 11 coating rolls Drive motor 12 Coater roll reduction device 13 Spray nozzle 14 Coating liquid 15 Piping 16 Filter 17 Coating liquid tank 18 Circulation pump 19 Trough 20 Liquid receiver

Claims (2)

[Claims] 1. A squeeze-type coating method using a coater roll having a plurality of grooves formed on the peripheral surface of a rubber roll,
The groove of the coater roll is formed in a spiral shape in the axial direction of the coater roll, and a shaping metal object having a convex strip blade having the same shape as the groove of the coater roll is pressed in conformity with each groove of the coater roll. A coating method using a grooved coater roll is characterized in that the coating is performed while repeatedly following the groove of the coater roll. 2. A squeeze type coating apparatus using a coater roll in which a plurality of grooves are formed on the peripheral surface of a rubber roll,
The groove of the coater roll is formed in a spiral shape in the axial direction of the coater roll, and a shaping metal article having a ridge blade having the same shape as the groove of the coater roll is provided so as to be able to move in and out of each groove of the coater roll. , And a pressing device that presses the shaped metal object on the coater roll, a traverse device that moves the shaped metal object parallel to the axis of the coater roll, and a ridge of the shaped metal object that is aligned with the groove of the coater roll. A coating device using a grooved coater roll, which is equipped with a phase control device that follows the groove.