JPS634870A - Device for adjusting gap in coater - Google Patents

Abstract

PURPOSE:To improve the working efficiency and the precision in coating thickness by outputting a reference gap value signal to a gap measuring instrument when a slider cotter passes a reference position, and driving a motor until the deviation between the measured value and the set value reaches zero. CONSTITUTION:The detection part 31a of the gap measuring instrument 31 is arranged between the carrying part 21 and supporting part 22 of the coater main body 19. A reference gap value signal (a) is outputted to the gap measuring instrument 31 from a reference value setting device 32 when the slider cotter 23 passes the specified reference position. A driving signal (d) is outputted to the motor 25 from a controller 33 until the deviation between the gap measured value (b) outputted from the gap measuring instrument 31 which is automatically preset after receiving the signal (a) and the set value (c) set by a target gap dimension setting device 42 reaches zero. As a result, coating can be immediately started, the working efficiency is improved, and the precision in coating thickness can be remarkably improved since the dimensional error of the gap can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement of a gap adjustment device in a coating machine. In the reverse roll coating machine 1 shown in FIG. 7, the locations that require highly accurate gap openings in coating □ are between the coating roll 2 and the metering roll 3 that moves close to the coating roll 2. Furthermore, in the case of the bar coating leprosy 5 shown in FIG. be. In the figure, 9 is a coating agent, and 10 is a base sheet.

[Prior Art] As shown in FIG. 9, a gap adjustment device for adjusting the gap portion 4 (8) (hereinafter referred to as gap portion G) is used to adjust the gap portion 4 (8) (hereinafter referred to as “gap portion G”), as shown in FIG.
A slide roller 13 that can freely move back and forth in the front and back direction is disposed between a support section 11 that supports the metering roll 3 or the doctor par 7 (hereinafter referred to as the measuring body N.1). , a feed screw 14 that is long in the front-rear direction and is screwed onto the slide screw 13, and a slide screw driver driving motor 15 that rotates the feed screw 14.

Slide Kotta 13. Gap adjustment devices 18, each consisting of a feed screw 14 and a motor 15, are provided on both left and right sides of the roll R and the measuring body M, respectively.

The procedure for adjusting the gap G between the roll R and the weighing body M using this gap adjustment device 18 is to insert and remove a standard thickness gauge (not shown) from the gap G and check the gap G while the motor 15 is adjusted. By driving, each slider 13 is moved forward from the waiting position on the right side in the figure to the left side in the figure, and the gap G becomes the standard gap size.

When this occurs, the motor 15 is stopped and the presetting of the motor 15 is completed. In order to set the gap size of the gap G to a desired value that is increased or decreased from the standard gap size, the required rotation speed of the motor 15 is determined based on the increase or decrease of the gap G per rotation of the motor 15. , the pulse signals from the encoder 16 directly connected to each motor 15 are counted, and then the motor 15 is rotated forward or reverse by the required number of rotations.

[Problems to be Solved by the Invention] However, the gap adjustment device @18 had the following drawbacks.

(al) Control of the motor 15 at the end of the coating operation
When the input electricity to A17 is cut off, encoder 16
The memory of the current rotation speed will be erased. Therefore, conventionally,
When restarting the coating operation, it is necessary to perform the presetting again using the thickness gauge as described above. However, the presetting work requires a long time and a lot of effort, which reduces the operating efficiency of the coating machine.

(b) Since there is backlash between the feed screw 14 and the slide roller 13, even if the motor 15 is rotated forward and backward by a predetermined number of rotations, the slide roller 13 cannot be moved forward or backward by a predetermined distance. , an unnoticeable error (for example, 5 to 10 μl) may occur in the dimension of the gap G, resulting in a decrease in coating thickness accuracy.

SUMMARY OF THE INVENTION In order to solve the above-mentioned drawbacks, the present invention aims to provide a gap adjustment device capable of improving the operating efficiency of applying pus and improving the accuracy of the coating thickness.

[Means for Solving the Problems] The present invention solves the above-mentioned problems, and the present invention is arranged such that it can move forward and backward between a support part that supports a roll and a holding part that holds a measuring body that moves close to the roll. A gap adjusting device for a coating machine, which is equipped with a slide roller that adjusts the gap between a roll and a measuring body, and a motor that drives the slide roller forward and backward, the gap measuring device having a detection section between the supporting section and the holding section. a reference value setting device that issues a reference gap value signal to a gap measuring device when the slide cotter passes a predetermined reference position; and a gap that is automatically preset by the gap measuring device upon receiving the reference gap value signal. Adjustment ff1j that issues a drive signal to the motor until the deviation between the actual measurement value and the set value becomes zero.
It becomes more like a vessel.

[Function] The present invention is provided with a reference value setting device that emits a reference gap value signal to the gap measuring device when the slide cotter passes a predetermined reference position. Perform self-help presetting of gap measuring device.

Further, the present invention is provided with a regulator that issues a drive signal to the motor until the deviation between the actual gap measurement value generated by the automatically preset gap measuring device and the set value becomes zero, so that the gap size is adjusted to the set value. The motor drives the slide footer until the value is reached.

[Description of Embodiments] Hereinafter, a gap adjusting device in a coating machine according to the present invention will be described based on embodiments shown in the drawings.

The gap adjustment device in the coating machine is, as shown in FIG.
0, and left and right motors 25 that operate each gap adjustment device 20.
, 25, and left and right adjusters 33. for adjusting each motor 25.
33, left and right gap measuring devices 31.31 that feed back actual measured values of the left and right gaps, and left and right reference value setting devices 32.32 that preset reference values in each gap measuring device 31.

As shown in FIGS. 2 and 3, the applicator main body 19 includes an O-ru R that is pivotally supported on support parts 21.21 consisting of left and right fixed frames, and an O-ru R that is pivoted on support parts 21.21 that is made up of left and right fixed frames. A holding section 22.22 consisting of a swinging arm, and a left and right moving means 2 consisting of an air cylinder or the like for raising and lowering the holding section 22.22.
3.23, and a measuring body M held by a holding portion 22.22.

Gap G formed between roll R and measuring body M (fourth
A pair of gap adjustment mechanisms 20 for adjusting the gap size (see figure) are provided on the left and right sides. Each gap adjustment mechanism 20 is
Between the support part 21 and the holding part 22, there is a slide lever 23 (for example, the slope of the upper surface 23a is 1/20 to 1/30) arranged so as to be able to move back and forth in the front and rear directions, and a front and rear part that is screwed into the slide lever 23. It is composed of a feed screw 24 that is long in the direction.

Left and right motors 25 25 for rotationally driving the feed screws 24 , 24 are fixed at appropriate positions on the applicator main body 19 , and motor output portions are connected to the corresponding feed screws 24 .

Each motor 25 moves the corresponding slider 23 with the arrow A.
direction (see Figure 2) at an appropriate speed (for example, 40 to 80μ).
m/Sec) to make the measuring body M separate from the roll R, thereby increasing the gap dimension of the gap G, and conversely, by moving the measuring body M closer to the roll R by moving it forward in the direction of the arrow B. Reduce the gap size of the gap.

As shown in FIG. 1, the control devices 30 that automatically control the gap size of the gap G are provided in sets on the left and right sides.

Each control device 30 includes a gap measuring device 3 in which a detection section 31a is disposed between the support section 21 and the holding section 22 of the applicator main body 19.
1 and the reference gap value signal a when the slide roller 23 passes a predetermined reference position (a position (position in the middle of FIG. 4) where the slide roller 23 is slightly advanced from the upper limit standby position (position C in the figure)). A reference value setting device 3 that issues a value to a gap measuring device 31.
2, the motor is operated until the deviation between the actual gap value issued by the gap measuring device 31, which is automatically preset in response to the reference gap value signal a, and the set value C set by the target gap size setting device 42 becomes zero. 25 and a regulator 33 which issues a drive signal d.

The gap measuring device 31 has a minimum reading value of about 0.65 to 1 μl, and is capable of high-precision measurement using an appropriate method, such as using the operating principle of inductosin, which detects a position by extracting changes in induced voltage. Use a vessel. The detecting section 31a of the gap measuring device 31, as shown in FIGS. 4 and 5,
A bracket 34 fixed to the holding part 22 of the applicator main body 19
is maintained.

The reference surface 35a that the measuring element 31b of the detection part 31a comes into contact with is the mirror-finished upper surface of the bolt 35 fixed to the support part 21 of the applicator main body 19 via the bracket 36. The position is at the gap G
This is a position where the gap size can be actually measured, that is, a position where the probe 31b coincides with an extension of an imaginary vertical plane erected on the outer circumferential surface of the roll R so as to pass through the gap G.

The reference value setter 32 (see FIG. 1) uses a high-precision position detection switch of an appropriate type, such as a non-contact type switch that detects the position of the magnet with a magnetically sensitive element and issues a detection signal. As shown in FIGS. 4 and 5, the reference setter 32 has a structure including a magnetic body 32a fixed to the inner surface 23a of the slide roller 23, and fixed to the support portion 21 of the applicator body 19 via a bracket 37. a detection head 32b and a detector 32C that detects the position of the magnetizing body 32a when the advancing slide roller 23 reaches a predetermined reference position (the middle position in the figure) and generates the reference gap value signal a; (See Figure 1). In addition, roll R
The gap size of the gap G between the measuring body M and the measuring body M is uniquely determined by the relationship with the coordinate position of the slide roller 23 in the advancing and retreating direction. Therefore, the slide roller 23 is stopped at a predetermined reference position (the middle position in FIG. 4), and the gap G
A value obtained in advance by measuring the gap size with a thickness gauge or the like becomes a known reference gap value.

The support part 21 of the applicator main body 19 has a slide tipper 23.
upper limit position detector 3 that detects that has reached the upper and lower limit positions;
8 and a lower limit position detector 39 are attached via brackets 40 and 41 to prevent the slide roller 23 from overrunning. As shown in FIG. 1, the upper limit position detector 38 detects the slide roller 23 that has reached the upper limit standby position (position C in the figure) and issues a motor stop signal e to the regulator 33. The position detector 38 is
7J by detecting the slide roller 23 that has reached the lower limit position (position E in the figure) that makes the gap size of the gap G a predetermined minimum value.
This is to issue a motor stop signal f to the J node 33.

In addition, in a production line equipped with two or more coating machine bodies, efficient coating work can be achieved by linking the main sequencer and each regulator 33 into a link module.

(Operation) Next, an example of the operation of the gap adjustment device in the coating machine according to the present invention will be described based on the circuit diagram shown in FIG. 1 and the flowchart shown in FIG. 6.

■ When the power is turned on to the motor 25.25 at the start of coating work, the started motor 25.25 moves the slide coater 2.
3. Retract 23 to the upper limit position on its own.

■ Lower the holding part 22.22 and roll the body M.
to form a gap G (state shown in FIG. 4).

(2) Set a desired gap size value as a set value using the target gap size i setter 42.

(2) Turn on the positioning switch, start each motor 25, and move each slide roller 23 forward in a direction that reduces the gap size of the gap G. At the moment when each slide roller 23 passes a predetermined reference position, the reference value setting device 32 issues a reference gap value signal a to the corresponding gap measuring device. In fact, the gap measuring device 31 that receives the reference gap value signal a is automatically preset so that 1 value becomes the reference gap value.

(2) The regulator 33 issues a drive signal to the corresponding motor 25 until the difference between the actual measured value of the gap size generated by the preset gap measuring device 31 and the set value becomes zero, and when the deviation becomes zero, The motor 25 is stopped to complete the gap adjustment. It is also possible to send the actual measured value generated by the gap measuring device 31 to a computer and use it for quality control.

■ The applicator body 19 is a bar applicator (see Figure 8).
In this case, if the coating thickness is uneven due to the thickness unevenness in the width direction of the base sheet 1o, by appropriately correcting the preset reference value, the corresponding motor 25 can be driven to achieve a uniform coating thickness. The gap size of the gap part G is automatically adjusted so that The preset reference value can be corrected manually or automatically by inputting the output signal of the coating thickness tester or the gap dimension command signal of the computer into which various conditions of the base sheet 10 have been input into the adjuster 33 in advance. You can also do it.

[Effects of the Invention] As described in detail above, the gap adjusting device for a coating machine according to the present invention has the following excellent effects.

(1) The presetting of the gap measuring device is carried out automatically just by the slide cotter passing the predetermined reference position, so the presetting work by hand #7Il, which requires a long time as in the past, is eliminated, and the coating work can be started immediately. This makes it possible to dramatically improve the operating efficiency of the coating machine.

(2) Since the motor automatically stops when the deviation between the gap measurement value generated by the automatically preset gap measuring device and the set value becomes zero, there is no need to worry about any backlash between the feed screw and the slide screw. As a result, the dimensional error in the gap can be reduced from 5 to 10 μm to ±1 μm, dramatically improving coating thickness accuracy. .

(3) Thickness variation of the base sheet during the coating process.

If there is a change in coating thickness due to a change in the viscosity of the coating agent, etc., it can be corrected instantly without stopping the coating machine by correcting the preset value of the gap measuring device or changing the gap size setting. This dramatically improves operating efficiency.

[Brief explanation of the drawing]

1 to 6 show an embodiment of the gap adjustment device in a coating machine according to the present invention, in which FIG. 1 is a block diagram showing the entire circuit, and FIG. Right side view, Figure 3 is a rear view of the applicator gutter body, Figure 4 is an enlarged right side view showing the main part of the applicator body near the slide tip, Figure 5 is a front view of the same as above, and Figure 6 is a flowchart explaining the operation, FIG. 7 is a side view explaining the essentials of reverse roll coating, FIG. 8 is a side view explaining the overview of the bar coating machine, and FIG. 9 is gap control in a conventional coating machine. FIG. 3 is a right side view showing the device. 19... Applicator main body 20... M gap adjustment structure 21... Support part 22... Holding part 23.
...Slide controller 25...Motor 30...Gap control device 31...Gap measuring device 32...Reference ta setting device 33...Adjuster 42...Target gap size value setting device Patent applicant Representative of Inoue Kinbu Industries Co., Ltd. Patent attorney 1) Toshihiko Figure 2 Figure 3 Figure 5 Figure 4 Figure 1υ Figure 8 Figure 7 Figure 9

Claims (1)

[Claims] 1. A slide kettle is arranged to be able to move forward and backward between a supporting part that supports the roll and a holding part that holds a measuring body that moves close to the roll, and that adjusts the gap between the roll and the measuring body, and a slide kettle that moves back and forth. A gap adjusting device for a coating machine, which includes a driving motor, a gap measuring device having a detecting section between the support section and the holding section, and a gap measuring device that generates a reference gap value signal when the slide cotter passes a predetermined reference position. a reference value setter that issues a reference gap value to the gap measuring device, and a drive signal to the motor until the deviation between the actual gap value and the set value that is automatically preset by the gap measuring device in response to the reference gap value signal becomes zero. A gap adjustment device in a coating machine, which consists of a regulator that emits .