JP2004223468A - Method for positioning coating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for positioning a coating apparatus that controls precisely the position of a table on which a die or a roll is mounted. <P>SOLUTION: The method for positioning the table on which the coating die or the coating roll of the coating apparatus to be used for coating a film or sheet of a plastic is carried for moving is characterized by installing a linear motor between the table and a fixing block as well as a linear scale for detecting the position of the table thereon and positioning the table using feedback data from the position detector to the linear motor. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method of positioning a table for mounting and moving a coating die or a coating roll of a coating apparatus for applying a coating agent to a plastic film or sheet.
[0002]
[Prior art]
The coating die and the coating roll of the coating apparatus will be described. As shown in FIGS. 5 and 6, a film 1 supplied from a feeding device (not shown) as shown by an arrow a includes a die 2 for discharging a coating agent 4 and a die 2. The coating agent 4 is applied to the film 1 through the clearance α between the rolls 3 and is sent as a coating film 5 to a drying device (not shown) as indicated by an arrow b.
[0003]
Since the positioning accuracy of the die 2 and the roll 3 is very important for setting coating conditions and obtaining a uniform film thickness, for example, the die 2 is guided by a guide 6 and is moved right and left in FIG. It is mounted on a table 8 that can be moved.
As a result, the clearance α between the die 2 and the roll 3 can be changed and once set, the die 2 can be largely retracted (leftward in the drawing) to clean the die lip, and returned to the set clearance again. That is to ensure.
[0004]
In order to return the table 8 to the preset clearance α, the table 8 is brought into contact with an adjustable stopper 10 by means of a differential screw 9 or the like to perform positioning. References are listed below.
[0005]
Japanese Patent Application Laid-Open No. 2001-187356
[0006]
[Problems to be solved by the invention]
However, in this method, when the contact with the stopper 10 changes due to a change in the sliding resistance between the guide 6 and the table 8, the stop position of the table 8, that is, the position of the die 2 changes, and the clearance α becomes inaccurate. There was a drawback that it would.
Further, since the stopper 10 is elastically deformed, the stop position of the table 8 becomes unstable.
[0007]
An object of the present invention is to provide a positioning method of a coating apparatus for stopping a table on which a conventional die or roll is mounted with high precision as described above.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is directed to a method for positioning a table for mounting and moving a coating die or a coating roll of a coating apparatus for applying a coating agent to a plastic film or sheet, and fixing the table to the table. Attach a linear motor between the parts and attach a linear scale as a position detection device to detect the position on the table, and feed back the detection result detected by the position detection device to the linear motor control device to move the table to a predetermined position. The positioning method of the coating apparatus is characterized by positioning.
[0009]
It is preferable that the table is moved by an air static pressure guide.
[0010]
Thereby, the table on which the die and the roll are mounted can be stopped at a predetermined position with high accuracy.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS.
The film 20 supplied from a feeding device (not shown) passes through a clearance α between a die 22 for discharging a coating agent 21 and a roll 23, and is dried as a coating film 24 coated with the coating agent 21 (not shown). Sent to the device.
[0012]
The die 22 is mounted on a table 25, and the table 25 is moved over a guide 30 in the left and right direction in the figure by a linear motor 29 composed of a magnet 26 mounted on the table 25 and a coil 28 provided on a fixed portion 27. It is movable. Therefore, after the clearance α is changed and set once, the die 22 is largely retracted for cleaning the die lip and the like, and then can be returned to the set clearance again.
[0013]
A linear scale 32 for detecting the position of the table 25 is attached to the table 25, and a detection value detected by the linear scale 32 is fed back to the control device 31 of the linear motor 29, so that the stop position of the table 25 can be accurately determined. I try to keep it.
[0014]
Although the linear motor 29 in the above-described embodiment is constituted by the magnet 26 attached to the table 25 and the coil 28 provided in the fixing portion 27, the present invention is not limited to this, and it goes without saying that the linear motor 29 may be attached to a member opposite to the magnet 26 and the coil 28. Is self-evident.
[0015]
Referring to FIG. 4, another embodiment of the present invention will be described.
A die (not shown) is mounted on the table 41, and a linear motor 45 composed of a magnet 42 attached to the table 41 and a coil 44 provided on a fixing portion 43 moves on a guide 46 in the left-right direction in the figure. It is movable. Therefore, after the clearance α is changed and once set, the die 40 is largely retracted for cleaning the die lip and the like, and then the clearance can be returned to the set clearance again.
[0016]
Further, a porous bearing member 47 made of bronze, carbon, ceramics, or the like is attached to the surface of the table 41 facing the guide 46, and compressed air is blown out from a pipe or the like (not shown) as shown by an arrow to It is an air static pressure guide.
【The invention's effect】
As described above, since the table on which the coating die and the coating roll are mounted is a linear motor or an air static pressure guide, there is no vibration due to rotation, and there is no resistance between the guide 46 and the table 41, so that the table can move smoothly. As a result, it has become possible to maintain the stop position with high precision.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a method of stopping a table of a coating apparatus according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram of a table stopping method of the coating apparatus according to the embodiment of the present invention, and is a cross-sectional view taken along line AA of FIG. 1;
FIG. 3 is an explanatory view of a table stopping method of the coating apparatus according to the embodiment of the present invention, and is a view as seen from the arrow Z in FIG. 2;
FIG. 4 is an explanatory diagram of a table stopping method of a coating apparatus according to another embodiment of the present invention.
FIG. 5 is a schematic explanatory view of a table stopping method of a conventional coating apparatus.
FIG. 6 is a schematic explanatory view of a table stopping method of the conventional coating apparatus, and is a view as viewed in the direction of the arrow Y in FIG. 5;
[Explanation of symbols]
Reference Signs List 20 film 21 coating agent 22 die 23 roll 24 coating film 25, 41 table 26, 42 magnet 27, 43 fixing portion 28, 44 coil 29, 45 linear motor 30, 46 guide 31 controller 32 linear scale 47 porous bearing member

Claims (2)

In the method of positioning a table for mounting and moving a coating die or coating roll of a coating device that applies a coating agent to plastic films or sheets, a linear motor is mounted between the table and a fixed part, A coating device, wherein a linear scale is mounted as a position detecting device for detecting a position on a table, and a detection result detected by the position detecting device is fed back to a control device of a linear motor to position the table at a predetermined position. Positioning method. 2. The method according to claim 1, wherein the movement of the table is performed by an air static pressure guide.

Images