JPH10337519A - Multilayered die coater gap displacement measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the reproducibility of optimum coating conditions by measuring the displacement of a gap between each of a plurality of lip parts of a multilayered die coater and a packing roll. SOLUTION: There are provided a roll rotating mechanism 30 to slightly rotate a packing roll 12 when a gap displacement is measured and a contact displacement gage 50 which is provided so as to be movable in the axial direction of the roll 12 and which is rotated together with the roll 12 when a gap displacement is measured. When a multilayered die coater body 20 is located at a gap displacement measuring point recessed from the roll 12 farther than a coating point, a gage head 51 of the gage 50 rotates slightly at a point in the longitudinal direction of the body 20, while the head 51 is in contact with a plurality of tip end lip parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring the gap displacement of a multilayer die coater for discharging a coating material from a plurality of slots and applying a multilayer coating to the surface of a continuously running belt-like substrate.

[0002]

2. Description of the Related Art In general, in a multilayer die coater for applying a multilayer coating to a strip-shaped substrate, a plurality of paint discharge slots are formed between a plurality of tip lip portions. In the case of a two-layer die coater having two slots, It has upper, middle and lower three tip lips. In order to stably perform simultaneous two-layer coating with beautiful gloss with this two-layer die coater, it is necessary that each gap between each tip lip portion and the base material surface is set to an optimum condition. The adjustment range for this is about 1 to 1.6 times the wet coating film thickness, specifically about 20 to 80 μm.

[0003]

When two layers of wet-on-wet are simultaneously coated by a two-layer die coater in the coating of a color coated steel sheet for general building materials, the undercoat layer is usually in a wet state to a thickness of about several tens of micrometers. In order to uniformly apply the paint discharged from the undercoating slot, the gap between the middle lip located downstream of the undercoating slot in the paint outflow direction of the undercoating slot among the three upper, middle, and lower lip portions is required. Must be set correctly.

However, in the conventional gap measuring method using a gap gauge which has been simply performed for a single-layer die coater, only the narrowest gap portion of any of the upper and lower lip portions can be measured. Even when the method was applied to a two-layer die coater, accurate gap measurement for the middle lip could not be performed, and fine gap adjustment could not be performed. In addition, since there was no other appropriate gap measurement method, to check whether the gap at the middle lip was set to the optimum condition, it was necessary to perform a trial and error test while checking the coating condition by actually performing a coating test. Had to repeat the fine-tuning. Therefore, there is a problem that it takes time and effort to set the optimum gap, and that the applied base material used for the test is wasted.
Further, the coating specifications are not uniform, and a gap optimizing operation is required according to the change in the coating specifications, but the reproducibility of the optimum gap conditions was extremely poor. Here, even if a predetermined value is obtained by measuring between the upper lip portion and the backing roll, since the backing roll surface is a curved surface,
The gap between the middle or lower lip and the backing roll should be different from the value obtained for the upper lip. Therefore, it is important to accurately measure the gap that changes between each lip and the roll curved surface, that is, the gap displacement.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a multilayer die coater gap displacement measuring apparatus according to the present invention has a multilayer die coater main body having a plurality of tip lip portions having a small gap in a backing roll. In a multilayer die coater which is disposed so as to face each other at a distance, and applies a multilayer coating to a strip-shaped base material which is continuously conveyed while being supported by a backing roll by discharging paint from a plurality of slots formed between the respective tip lip portions. A roll rotation mechanism that minutely rotates the backing roll when measuring the gap displacement, and a contact displacement meter that is provided so as to be movable in the axial direction of the backing roll and that minutely rotates together with the backing roll when measuring the gap displacement. Gap where the die coater is retracted from the backing roll beyond the application position Measuring element of the contact displacement gauge when in the position measurement position is obtained so as to microspheroidal while contacting with the respective end lip portion at any point in the longitudinal direction of the multilayer die coater body.

In this multilayer die coater gap displacement measuring device, the backing roll is minutely rotated by the roll rotating mechanism when measuring the gap displacement. At this time, since the contact displacement meter is set so as to interlock with the backing roll, it rotates minutely with the backing roll. When the multilayer die coater main body is at the gap displacement measurement position retracted from the backing roll from the application position, the measuring element of the contact displacement meter makes minute rotation with the backing roll while contacting the plurality of tip lips of the multilayer die coater main body. This makes it possible to accurately measure the gap displacement between each tip lip portion and the backing roll. Further, since the contact displacement meter is movable in the axial direction of the backing roll, it is possible to measure the gap displacement of each tip lip at any point in the longitudinal direction of the multilayer die coater main body.

In the apparatus for measuring the gap displacement of the multilayer die coater according to the present invention, the measurement output signal from the contact displacement meter may be input to an automatic recording device, and the measurement result may be automatically displayed in a graph. In this case, the measurement results are automatically recorded and displayed, so that the labor for recording can be saved, and the gap adjustment can be performed while confirming the displayed measurement data immediately. Can be done quickly.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view of a multilayer die coater gap displacement measuring apparatus according to the present invention, and FIG.
Is a top view thereof. As shown in FIG.
The multi-layer die coater gap displacement measuring device denoted by reference numeral 0 is attached to the backing roll 12. The backing roll 12 is rotatable with a rotating shaft 14 protruding from both ends supported by a roll bearing 16.

A two-layer die coater main body 20 is opposed to the backing roll 12 in parallel. The two-layer die coater main body 20 has upper, middle, and lower tip lip portions facing the backing roll 12, and a top coating slot 21 is formed between the upper lip portion and the middle lip portion. An undercoating slot 22 is formed between the lip and the lower lip. At the time of application, the coating material is discharged from each of the slots 21 and 22, and is continuously transported while being supported on the outer peripheral surface of the backing roll 12 (not shown).
Are simultaneously coated with two layers.

The two-layer die coater main body 20 is mounted on a gantry 23. The gantry 23 is fixed on a base plate 24. The base plate 24 is attached by a linear bearing 27 to a linear rail 26 provided on an inclined surface above a support 25. When the gantry 23 and the base plate 24 move along the linear rail 26, the two-layer die coater main body 20
Move forward and backward in the direction toward the rotation center 18. As a result, the two-layer die coater main body 20 has a coating position (a position shown by a dotted line 28) where the tip lip portion is opposed to the backing roll 12 with a slight gap g, and a predetermined distance from the coating position. The retracted gap displacement measurement position (the position shown by the solid line) can be taken. The gantry 23 is provided with an adjustment mechanism (not shown) capable of finely adjusting the angle and height of the two-layer die coater main body 20 with respect to the backing roll 12.

A roll rotation mechanism 30 is provided above the roll bearing 16. The roll rotation mechanism 30 includes a ball screw 32 connected to a handle 31 and a ball screw 32.
, And a turnbuckle rod 34 having one end connected to the nut 33. The other end 36 of the turnbuckle rod 34 is a backing roll 1
2 is detachably screwed to a position near the outer peripheral surface of the end face. When the handle 31 is turned, the nut portion 33 moves in accordance with the rotation of the ball screw 32, and the backing roll 12 moves by the arrow a due to the movement of the turnbuckle rod 34.
It rotates slightly in the direction.

On the upper part of the backing roll 12,
A displacement meter support mechanism 40 is provided. Displacement meter support mechanism 40
Is provided with a U-shaped fixing plate 41. The fixing plate 41 is detachably screwed to both end surfaces of the backing roll 12. Two linear rails 4 are provided on the upper surface of the fixed plate 41.
2 is provided in parallel with the axial direction of the backing roll 12. A moving table 44 is attached to the linear rail 42 via a linear bearing 43, and is movable along the backing roll 12. An X-axis stage 45 is provided on the movable base 44 so as to be movable in the direction of arrow b. The X-axis stage 45 includes brackets 46, 4
7, a lever-type contact displacement meter 50 is attached. Thereby, the contact displacement meter 50 can be moved along the axial direction of the backing roll 12.

A lever-type measuring element 5 of the contact displacement meter 50
For example, the tip of 1 is in contact with the tip surface of the upper lip of the two-layer die coater body 20 at the gap displacement measurement position. The measuring element 51 can be minutely rotated around the supporting point in the direction of arrow c, and this rotation can cope with the gap displacement between the tip lip of the two-layer die coater main body 20 and the backing roll 12. ing. Also,
When the backing roll 12 is slightly rotated in the direction of arrow a by the roll rotation mechanism 30, the contact displacement meter 50 is also rotated in the same manner, whereby the tracing stylus 51 rotates while contacting the upper, middle, and lower lip portions. The gap displacement between each lip and the backing roll 12 can be measured. Further, when the moving table 44 moves in the axial direction of the backing roll 12 along the linear rail 42, the measuring element 51 of the contact displacement meter 50 moves in the longitudinal direction of the two-layer die coater main body 20 while contacting the tip lip. Therefore, the gap displacement between the tip lip and the backing roll 12 can be measured at an arbitrary position in the longitudinal direction of the two-layer die coater main body 20.

As shown in FIG. 2, the contact displacement meter 50 is connected to a personal computer 60 which is an automatic recording device. The measurement output signal from the contact displacement meter 50 is input to a data collection system 61 connected to a personal computer 60, and the measurement results are automatically graphed by spreadsheet software.
Is displayed.

Next, the measurement of the gap displacement by the multilayer die coater gap displacement measuring device 10 having the above configuration will be described. When measuring the gap displacement, first, the two-layer die coater main body 20 is moved a predetermined distance (for example, 1) from the coating position in the previous process.
(0 mm) to the gap displacement measurement position retracted. In the normal application state, the turnbuckle rod 34 of the roll rotation mechanism 30 is detached from the backing roll 12, and the displacement meter support mechanism 40 and the contact displacement meter 50 are also detached from the backing roll 12. Therefore, when measuring the gap displacement, the tip 36 of the turnbuckle rod 34 is fixed to the backing roll 12 and the displacement gauge support mechanism 40 is attached to the backing roll 12 so that the tip of the lever measuring element 51 of the contact displacement gauge 50 is The upper edge of the upper lip of the two-layer die coater body 20 at the displacement measurement position is brought into contact with the upper edge.

In this state, the backing roll 12 is slightly rotated by rotating the handle 31 of the roll rotation mechanism 30. With the rotation of the backing roll 12, the contact displacement meter 50 also rotates minutely, and the tip of the probe 51 moves while sequentially contacting the upper lip, the middle lip, and the lower lip of the two-layer die coater body 20. Alternatively, the tracing stylus 51 contacting the lower lip may be moved so as to contact the middle lip and the upper lip in this order. During this movement, the gap displacement between each lip portion and the backing roll 12 is measured, and the time interval of the measurement is set to 10 to 20 msec.
, About 200 points of measurement data are collected. Subsequently, the contact displacement meter 50 is moved in the axial direction of the backing roll 12, and a gap displacement measurement is performed at another point in the longitudinal direction of the two-layer die coater body 20 in the same manner as described above. In this way, gap displacement measurement is performed at at least two or more points.

The results of measurement by the contact displacement meter 50 are immediately graphed and displayed on the personal computer 60 as shown in FIG. It is the gap displacement between each lip portion and the backing roll 12 that is directly measured by the contact displacement meter 50, but the displacement distance when the two-layer die coater body 20 is retracted from the application position to the gap displacement measurement position. Since the thickness of the strip-shaped base material to be applied in the next step is known, the respective gap displacement values between each lip portion and the strip-shaped base material can be easily obtained based on the measurement results, and FIG. 3 is a graph of the gap displacement values. Things. Based on this graph, the advance / retreat position, height and angle of the two-layer die coater main body 20 are finely adjusted so that the gap for each lip portion is an optimum gap according to the application conditions.

When the above series of adjustment operations is completed, the turnbuckle rod 34 and the displacement meter support mechanism 40 are removed from the backing roll 12. Then, the band-shaped substrate is set so as to be supported on the outer periphery of the backing roll 12 through the space between the two-layer die coater body 20 and the backing roll 12, and then the two-layer die coater body 20 is advanced by a predetermined distance from the gap displacement measurement position. Set to the application position. Then, the coating material is supplied to the die coater body 20 and discharged from the slots 21 and 22, and the two-layer simultaneous coating is performed by running the strip-shaped base material.

As described above, according to the multilayer die coater gap displacement measuring apparatus 10, the backing roll 12 is slightly rotated by the roll rotating mechanism 30, whereby the measuring element 51 of the contact displacement meter 50 is moved to the two-layer die coater main body. 2
By making a minute rotation in the same manner while making contact with the zero-end lip portion, the gap displacement can be measured for each of the plurality of lip portions. In addition, since the contact displacement meter 50 can be moved over the entire length of each lip portion, the gap displacement can be measured at all places where gap adjustment is required. Therefore, the operation for reproducing the optimum coating conditions for each gap of each lip portion can be performed quickly and accurately, so that labor can be saved and productivity can be improved. Further, by moving the contact displacement meter 50 in the axial direction of the backing roll 12, the gap displacement can be measured at any point in the longitudinal direction of the two-layer die coater main body 20, so that the gap can be set uniformly over the coating width direction. Becomes easier.

Further, the measurement results obtained by the contact displacement meter 50 are automatically recorded on the personal computer 60, are graphed, and are immediately displayed. Therefore, the labor for recording is saved, and the gap is checked while confirming the displayed measurement data. Since the adjustment work can be performed, the work of setting the optimum gap can be performed quickly.

When the height and angle of the two-layer die coater main body 20 are changed by an adjusting mechanism (not shown), the gap of each lip portion also changes. By examining the relationship of the changes in advance, it is possible to establish the optimum gap conditions in various coating conditions.

In the above description, the displacement meter support mechanism 40 is removed at the time of coating.
May be larger than the width of the backing roll and fixed and supported by appropriate means provided at positions distant from both sides of the backing roll, and the coating operation may be performed by removing only the contact displacement meter 50. In addition, various modes are conceivable for mounting the contact displacement meter 50. For example, the contact displacement meter 50 may be mounted on the outer peripheral surface of the backing roll 12 using an appropriate bracket.

In the above description, an example of a two-layer die coater has been described. However, the present invention can be similarly applied to a multilayer die coater having three or more layers.

[0024]

As is apparent from the above description, according to the present invention, the gaps at a plurality of lip portions of a multilayer die coater can be accurately measured, and the work for reproducing the optimum coating conditions can be performed quickly. , Labor can be saved and productivity can be improved.

[Brief description of the drawings]

FIG. 1 is a side view of a multilayer die coater gap displacement measuring device.

FIG. 2 is a top view of the multilayer die coater gap displacement measuring device.

FIG. 3 is a graph of a measurement result obtained by a contact displacement meter.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Multilayer die coater gap displacement measuring device, 12 ... Backing roll, 20 ... Multilayer die coater main body, 21 and 22
2. Slot, 30: Roll rotation mechanism, 40: Displacement meter support mechanism, 50: Contact displacement meter, 51: Probe.

Claims (2)

[Claims] 1. A multilayer die coater main body is disposed such that a plurality of tip lip portions thereof are opposed to a backing roll with a slight gap therebetween, and paint is discharged from a plurality of slots formed between the respective tip lip portions. A multi-layer die coater that applies a multi-layer coating to a belt-shaped base material that is continuously conveyed while being supported by a backing roll, and a roll rotation mechanism that slightly rotates the backing roll when measuring a gap displacement, and is provided so as to be movable in the axial direction of the backing roll. And a contact displacement meter that rotates minutely with the backing roll at the time of gap displacement measurement, and the contact point of the contact displacement meter when the multilayer die coater body is at a gap displacement measurement position retracted from the backing roll from the application position. At each point in the longitudinal direction of the multilayer die coater body. Multilayer die coater gap displacement measuring apparatus being characterized in that so as to microspheroidal while contacting the up section. 2. The multi-layer die coater gap displacement measuring device according to claim 1, wherein a measurement output signal from said contact displacement meter is input to an automatic recording device, and a measurement result is automatically displayed as a graph.