JPH05323326A - Production of liquid crystal panel - Google Patents

Abstract

PURPOSE:To solve the formation of nonuniform film quality and to provide the liquid crystal panel of a high contrast for gradation display by uniform film quality in a printing stage for the oriented films, insulation films, etc., of the liquid crystal panel. CONSTITUTION:A servo motor 8' is used as a kneading motor of a printing machine and a stage traveling region is formed by extending this region longer than heretofore. As a result the uniformly oriented films and insulating films are formed and, therefore, the production of the liquid crystal panel of the gradation display and the high contrast is possible and this process is extremely advantageous for practicability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal panel manufacturing method for forming a uniform alignment film and insulating film on a flexographic printing machine.

[0002]

2. Description of the Related Art In recent years, with the increase in production of liquid crystal panels for gradation display and high contrast, a manufacturing method of forming an alignment film and an insulating film of a liquid crystal panel using a flexographic printing machine has been adopted. ..

A flexographic printing machine will be described below with reference to the drawings. FIG. 3 shows the configuration of a conventional flexographic printing machine.

The flexographic printing machine is equipped with a nozzle 1 below the alignment film droplets.
Alignment film liquid 3 dripped from the anilox roll 2 onto the surface
Is a device for kneading and thinning with a printing pressure of a doctor roll 4 and transferring it under pressure onto a glass substrate 6 through a plate cylinder 5 of a metal roll to which a resin type relief sheet is attached. Since the anilox roll 2 holds the liquid on the surface, 50 μ to 10 μm per side
It is a metal roll in which 0 μ concave pyramids are arranged like a grid pattern.

The main operation is to drop the alignment film liquid 3
The kneading operation of forming a kneading thin film on the surface of the anilox roll 2 and the printing operation of transferring the thin film formed on the anilox roll surface onto the glass substrate 6 on the printing stage 7 via the plate cylinder 5 under pressure.

First, the kneading operation will be described. Only the anilox roll 2 and the rubber doctor roll 4 are rotated by the kneading induction motor 8. The rotation of the kneading induction motor 8 is synchronized with the output shaft thereof by the key A9,
It is transmitted to the anilox roll 2 via the held gear A10 and the gear B12 containing the one-way clutch 11. Furthermore, from the anilox roll 2, use the key B13
Is transmitted to the doctor roll 4 via a gear C14 which is held so as to rotate synchronously with and a gear D16 which is held so as to rotate synchronously with a key C15. For the doctor roll, the rotation speed ratio to the anilox roll is 1/2 to 1/3.
(The rolls 2 and 4 rotate in the directions of arrows A and B, respectively.) The anilox roll 2 has side plates A19, via a housing A17 (a pair of left and right) having a bearing 18 built therein.
It is rotatably fixed to the side plate B20. Color A2
1, a color B22 is a disengagement of the gear C14 and the gear B12. Gear E23 with built-in one-way clutch 24
Is used for the printing control motor 25 during the printing operation described later.
It is for power transmission from to anilox roll 2.

Here, the anilox roll 2 is synchronized with one of the rotations by the kneading induction motor 8 or the printing control motor 25 by the one-way clutches 11 and 24, which is the faster rotation in the arrow B direction. The doctor roll 4 is a housing B27 (a pair of left and right) with a bearing 26 built-in.
It is held by the side plate A19 and the side plate B20 via.

The collar C28 is a disengagement of the gear D16. The kneading control motor 8 is attached to the side plate B by the bracket 29.
The number is side by side. Regarding the dropping of the alignment film liquid 3, so that it can be made uniform on the surface of the anilox roll 2,
The alignment film droplet lower nozzle 1 is moved left and right. On the nozzle moving table 30, there are a pulley 32 rotatably fixed to a column 31 and a dripping motor 33, and a timing belt 35 stretched between them is provided with a nozzle 1 for aligning film droplets.
Is installed. The dripping motor 33 is a bracket 36
It is fixed to the nozzle moving table 30.

Next, the printing operation will be described. FIG. 2 shows the speed state of each part during the printing operation. The printing control motor 25 controls the printing stage 7, the plate cylinder 5, and the anilox roll 2.
Is synchronous operation (stage speed and each roll peripheral speed are constant)
When

[0010]

[Equation 1]

It can be seen that the rotational vibration region (part (b) in FIG. 2) is large because it cannot be set. (However, for doctor roll 4, rotation speed ratio to anilox, 1/2 to 1
/ 3).

The printing control motor 25 is a coupling 3
7, reducer 38, coupling 39, shaft A40,
The printing stage 7 is moved forward in the arrow direction or backward in the opposite direction via the key D41, the gear E42, and the rack A43. The shaft A40 is rotatably held in a housing B45 via a bearing 44 (not visible in the figure). The printing stage 7 is fixed on two linear ways 47 fixed to a base 46 so as to be able to move forward and backward. There is. Further, when the printing stage 7 moves forward and backward, the rack B4
8, gear F49, shaft B50, gear G51, gear H
The plate cylinder 5 is rotated in the forward and reverse directions via 52 and the gear I53. It is transmitted from the plate cylinder 5 to the anilox roll 2 via a gear I53, a gear E23 and a one-way clutch 24. (However, only when the peripheral speed of the print control motor 25 is higher than or equal to the peripheral speed of the kneading control motor 8.) The gear F49 and the gear G51 are integrated with the shaft B50 by the key D54 and the key E55. Rotate. The shaft B50 is rotatably fixed to the housing C57 via a bearing 56. The gear H52 is rotatably fixed to the support column 59 via a bearing 58. The plate cylinder 5 is rotatably fixed by bearings 60. The plate cylinder 5 is rotatably held by a bearing 60, and the gear I5
3 and 3 are rotated integrally by the key F61. The plate cylinder 5 must be in contact with the anilox roll 2 when the stage 7 advances and print, and must be separated from the anilox roll 2 when the alignment film stage 7 retracts. For this reason, the bearing portion of the plate cylinder 5 moves up and down in the diagonal direction of arrow C and separates from the anilox roll 2 at the bottom dead center. As for its structure, the plate cylinder 5 is rotatably held by a bearing 60, the bearing 60 is built in a slide block 62, and the slide block 62 is guided by a guide block 64 via a cross roller bearing 63.
Is held up and down in the diagonal direction of arrow C. The bracket 65 moves up and down by a cylinder 66 attached to the side plate A19 and the side plate B20.

[0013]

However, in the above conventional configuration, since the induction motor is used as the drive source for the kneading operation,
The peripheral speed varies and (1) (V1: Anilox roll peripheral speed during printing operation, V2: Anilox roll peripheral speed during kneading operation) cannot be set with high accuracy. Therefore, in the process in which the anilox roll is synchronized with the peripheral speed V2 to V1, the rotational vibration region (part (2) in FIG. 2) due to the impact is long and uneven printing is performed.

Further, the anilox roll becomes a printing region (the portion shown in FIG. 2B) while there is rotational vibration (the portion shown in FIG. 2B), so that non-uniform printing is performed because the stage traveling region is set.

Due to the above reasons, the non-uniform alignment film and insulating film are formed. However, even with such a non-uniform alignment film and insulating film, there is no problem in manufacturing a liquid crystal panel for binary display and low contrast, but it is difficult to manufacture a liquid crystal panel for gradation display and high contrast. there were.

It is an object of the present invention to provide a method for manufacturing a liquid crystal panel for gradation display and high contrast by solving the above conventional problems and forming a uniform alignment film and an insulating film.

[0017]

To achieve this object, the flexographic printing machine of the present invention uses a kneading operation drive source and a control motor for the printing operation drive source. An anilox roll is provided from the plate cylinder side. The stage travel area is extended so that a thin film is formed after the rotational vibration is attenuated when synchronizing with the speed.

[0018]

With this configuration, the rotational vibration region due to impact is reduced and uniform printing can be performed in the process in which the anilox roll is synchronized with the peripheral speed V2 to V1, and a thin film is formed after the rotational vibration is attenuated, so that uniform printing can be performed.

[0019]

EXAMPLE In this example, a servomotor 8'is used as a driving source for kneading instead of the conventional induction motor (8). The other structure is the same as the conventional one, and will be described with reference to FIG. The operation of the flexographic printing machine having such a configuration is different from the conventional one in that the anilox roll 2 is synchronously operated (the stage speed and each roll peripheral speed are constant).
At this time, since the servomotor 8'is used, the peripheral speed difference V1-V2 (a in FIG. 1C) between the anilox roll peripheral speed V1 during the printing operation and the kneading operation is set to (Equation 1). The rotation vibration region (Fig. 1B) is small. Further, by extending the stage traveling area by the amount of D in FIG. 1A, when the anilox roll 2 is synchronized with the speed given from the plate cylinder side, a thin film is formed after the damping (FIG. 3C). .. Therefore, after the vibration is completely dampened, the printing operation is started, and uniform printing can be performed.

[0020]

As described above, the present invention uses a control motor for a kneading operation driving source and a printing operation driving source. By extending the stage traveling area, uniform alignment film and insulating film printing can be performed. It is an excellent manufacturing method capable of producing a liquid crystal panel for gradation display and high contrast.

[Brief description of drawings]

FIG. 1 is a characteristic diagram showing a speed state of a flexographic printing machine during a printing operation in an embodiment of the present invention.

FIG. 2 is a characteristic diagram showing speed states of various parts during printing operation in a conventional flexographic printing machine.

FIG. 3 is an exploded perspective view of a flexographic printing machine.

[Explanation of symbols]

 1 Alignment Layer Droplet Nozzle 2 Anilox Roll 3 Alignment Layer Liquid 4 Doctor Roll 5 Plate Cylinder 6 Glass Substrate 7 Printing Stage 8 Kneading Induction Motor 8'Kneading Servo Motor 25 Printing Control Motor

Claims (1)

[Claims] 1. A method of manufacturing a liquid crystal panel using a flexographic printing machine, comprising forming a thin film of an alignment film liquid or an insulating film liquid on the surface of an anilox roll and transferring it under pressure to a glass substrate through a plate cylinder. A servo motor is used as a kneading operation driving source and a printing operation driving source of the machine, and thin film printing is performed after the rotation vibration generated when the anilox roll is synchronized with the speed given from the plate cylinder side is attenuated. A method for manufacturing a liquid crystal panel, comprising setting a stage traveling area.