TWI559049B - Screen printing device and method - Google Patents

Description

Screen type film device and method

The invention relates to the field of film processing technology for continuous production in a liquid crystal panel process, in particular to a screen type film sticking device and method.

In the conventional liquid crystal panel manufacturing process, there are mainly two kinds of filming methods for continuous production: one of them is a film that is attached to the film carrier and the film carrier by relative motion. During the filming process, the diaphragm and the diaphragm stage may cause friction or displacement due to relative sliding, and are usually used in a continuous production line; the other is that the object carrier and the film stage are relatively fixed, and the film stage is fixed. The screen is used to support the diaphragm, and the film roller is applied to the diaphragm by means of a screen press, which is usually used on a separate machine.

The conventional filming operation mainly has the following problems and shortcomings: on the one hand, the finished film of the film may generate bubble lines (line or band shape formed by fine bubbles) due to the initial relative position of the roller and the film, during the filming process. Because of the characteristics of the diaphragm, the quality of the film cannot be completely guaranteed (including the accuracy of ensuring and no bubble generation). On the other hand, since the protective film on the diaphragm needs to be manually removed by tape, or added with a complicated mechanism, it does not have continuous production capacity on the production line. However, whether it is manually removed or mechanically removed, it is limited by the adsorption force of the vacuum cage, but can only be torn from the corner, and cannot be widely applied to various current types of equipment.

The object of the present invention is to solve the above deficiencies and provide a screen type sticker. The membrane device and method can not only effectively solve the product defect caused by the bubble line, but also greatly reduce the production cost of the customer, and is not limited by the existing production equipment, and can be widely applied to the laminating machine of various automatic continuous production lines. .

In order to achieve the above object, a screen type film sticking device is developed. The invention comprises a screen plate, a net frame and a vacuum net box. The screen plate and the net frame are sealed and connected at an upper end of the vacuum net box, and a vacuum chamber is arranged in the vacuum net box. The vacuum chamber is provided with two sets of sliding tables composed of a servo motor, a ball lead screw and a linear slide. The above sliding table group drives the film roller and the vacuum suction cup respectively. The output end of the servo motor is connected to the ball lead screw, which is connected to the linear slide. The servo motor is connected to the control system through a Programmable Logic Controller (PLC). The film roller adopts high-precision anti-static roller, and the high-precision stainless steel supporting roller is arranged under the film roller.

The screen film applicator of the present invention further includes a blower that provides a negative pressure to the vacuum chamber.

The screen film applicator of the present invention further includes a vacuum pump that provides a vacuum to the vacuum chuck.

The screen type film sticking device of the present invention, wherein a pressure switch and a ruler are disposed on an outer side wall of the vacuum cage.

The screen type film coating method provided by the invention comprises the following steps: the first step: first extracting the gas inside the vacuum cage to maintain the negative pressure, continuously raising the vacuum chuck and pumping the air, and the diaphragm of the read position is taken. Aspirating through a mechanical arm and placing it on a vacuum cage, the vacuum suction cup adsorbing the membrane to be attached through the screen diaphragm; The second step: after tearing off the protective film on the surface of the film to be attached, the vacuum net cage is raised to bring it close to the liquid crystal panel, and is stopped after maintaining a certain distance; the third step: the film roller moves up and moves, the film The film and the liquid crystal panel are pressed and pressed, and after the film roller exceeds the bonding range, the film is lowered back to the original point to complete the entire operation procedure.

Compared with the prior art, the present invention has the following advantages:

(1) In the present invention, since the initial position of the film roller is outside the diaphragm, the bonding starts to enter the bonding range, so that the product defect caused by the bubble line can be effectively solved 100%.

(2) The invention can be applied without a large amount of tape consumables or a large change in the structure of the original production equipment, which can greatly reduce the production cost of the customer.

(3) The traditional film is limited by the tear-off protective film program, so that other net-type film laminating machines in the market can only be produced as a single machine, and cannot be integrated into the continuous automatic production mode of the whole process. However, the device of the present invention can be widely applied to various types of automated continuous line film laminating machines without being limited by existing production equipment.

(1)‧‧‧ Screen

(2) ‧‧‧ net frame

(3) ‧‧‧vacuum cage

(4) ‧‧‧vacuum chamber

(5)‧‧‧Servo motor

(6) ‧‧‧Ball lead screw

(7)‧‧‧Linear slides

(8)‧‧‧film roller

(9)‧‧‧vacuum suction cup

(10)‧‧‧Stainless steel support roller

(11)‧‧‧ Pressure switch

(12)‧‧‧ rule

(13)‧‧‧ helical gears

(14) ‧‧‧thin cylinder

(15)‧‧‧Deep groove ball bearings

(16) ‧‧‧floor

(17) ‧‧‧Filling layer

First Figure: A schematic view of the structure of the present invention.

Second drawing: a perspective view of a screen and a vacuum cage of the present invention.

Third Figure: is a plan view of the screen and vacuum cage of the present invention.

Figure 4: Front view of the screen and vacuum cage of the present invention.

Fig. 5 is a partial enlarged view of the area A of the fourth figure.

The screen-type film sticking device of the present invention will be further described below with reference to the first drawing. As shown in the first figure, the screen-type film sticking device of the present invention comprises: a screen (1), a frame (2) and a vacuum cage (3). ). The screen (1) and the frame (2) are sealed and connected to the upper end of the vacuum cage (3). A vacuum chamber (4) is disposed in the vacuum cage (3), and two sets of components such as a servo motor (5), a ball lead screw (6), a linear slide rail (7), and the like are disposed in the vacuum chamber (4). The set of slides. This slide group drives the film roller (8) and the vacuum chuck (9) respectively. The output end of the servo motor (5) is connected to the ball lead screw (6), which is connected to the linear slide (7). The servo motor (5) is connected to the control system through a Programmable Logic Controller (PLC); wherein the film roller (8) adopts a high-precision antistatic roller, and a high-precision stainless steel support roller is arranged under the film roller (8) ( 10).

The screen film applicator of the present invention further includes a blower (not shown) that supplies a vacuum to the vacuum chamber (4) and a vacuum pump (not shown) that supplies a vacuum to the vacuum chuck (9).

As shown in the first figure, the screen film applicator of the present invention further has a pressure switch (11) and a ruler (12) on the outer side wall of the vacuum cage (3).

As shown in the second to fifth figures, the screen type film sticking device of the present invention, wherein the screen (1) is subjected to a plurality of times of coating and standing to dry, and finally exposed and washed to make a filler layer (17). The thickness is equal to the total thickness of the screen (1) to achieve a better vacuum.

The maximum value of the vacuum test of the conventional screen is between -80 and -85 kPa, which can no longer be increased (the direct adsorption value is -101 kPa without the screen). After the original change of the invention, the minimum can reach -85kpa, the normal state can reach -90kpa, and the best can reach -91~-92kpa. After the improvement of the invention, all the existing protective film tests can be smoothly removed, and there is no difference in the specifications of the protective film. The situation can not be torn off or the cage is broken.

The invention utilizes a screen and a vacuum chamber to form a vacuum cage as the support and limit fixing of the diaphragm. A plurality of traverse and lifting mechanisms composed of a servo motor (5) and a ball screw (6) slide group are arranged in the vacuum chamber (4) to apply pressure and displacement to the film roller (8). In the vacuum chamber (4), another set of traverse and lifting mechanisms composed of a servo motor (5) and a ball lead screw (6) slide group are provided as displacement of the vacuum chuck. The vacuum chamber is used to provide a negative pressure to the vacuum chamber (4), and the vacuum pump is used to provide a vacuum to the vacuum chuck (9).

The screen printing method of the present invention has the following steps:

1. First withdraw the gas inside the vacuum cage (3) to maintain the negative pressure, continue to raise and vacuum the vacuum chuck (9), and take the diaphragm in the interpreted position through the robot arm and place it in the vacuum cage ( 3) On, the vacuum chuck (9) adsorbs the film to be attached across the screen film.

2. After tearing off the protective film on the surface of the film to be attached by the tearing mechanism, the vacuum cage (3) is raised to bring it close to the liquid crystal panel, and is stopped after maintaining a certain distance.

3. The film roller (8) moves up and moves, and pressurizes the film and the liquid crystal panel. After the film roller (8) exceeds the bonding range, it returns to the original point, thus completing the entire operation procedure.

The invention adopts the following structure: (1) Control part: consists of a programmable controller (Programmable Logic Controller, PLC for short) and various servo controllers to control components; (2) drive unit: servo motor, ball The lead screw and the linear slide constitute a sliding table group, and the sliding roller group and the vacuum suction cup are respectively driven by the sliding table group; (3) the vacuum net box portion: is composed of a screen plate group and a net box which can be quickly replaced, and is composed of a blower; The screen version is designed for quick disassembly and adopts special coating process to ensure the vacuum degree. (4) Film roller part: high-precision anti-static roller, supplemented by high-precision stainless steel support roller to maintain the film The straightness of the roller; (5) Vacuum suction cup: vacuum suction cup designed with special flow path to ensure the vacuum or vacuum suction may be insufficient when the protective film is torn.

Compared with the prior art, the present invention has the following advantages: the screen type film coating apparatus and method of the present invention have the following advantages:

(1) In the present invention, since the initial position of the film roller is outside the diaphragm, the bonding starts to enter the bonding range, so that the product defect caused by the bubble line can be effectively solved 100%.

(2) The invention can be applied without a large amount of tape consumables or a large change in the structure of the original production equipment, which can greatly reduce the production cost of the customer.

(3) The traditional film is limited by the tear-off protective film program, so that other net-type film laminating machines in the market can only be produced as a single machine, and cannot be integrated into the continuous automatic production mode of the whole process. However, the device of the present invention can be widely applied to various types of automated continuous line film laminating machines without being limited by existing production equipment.

The present invention is not limited to the above-described embodiments, and any other changes, modifications, substitutions, combinations, and simplifications that are made without departing from the spirit and scope of the invention are equivalent to the alternatives and are included in the present invention. Within the scope of protection.

(1)‧‧‧ Screen

(2) ‧‧‧ net frame

(3) ‧‧‧vacuum cage

(4) ‧‧‧vacuum chamber

(5)‧‧‧Servo motor

(6) ‧‧‧Ball lead screw

(7)‧‧‧Linear slides

(8)‧‧‧film roller

(9)‧‧‧vacuum suction cup

(10)‧‧‧Stainless steel support roller

(11)‧‧‧ Pressure switch

(12)‧‧‧ rule

(13)‧‧‧ helical gears

(14) ‧‧‧thin cylinder

(15)‧‧‧Deep groove ball bearings

(16) ‧‧‧floor

Claims (7)

A screen type film sticking device comprises: a screen plate; a net frame; and a vacuum net box; the net screen and the net frame are sealed and connected at an upper end of the vacuum net box, and a vacuum chamber is arranged in the vacuum net box, and the vacuum chamber is arranged in the vacuum chamber There are two sets of slide table composed of a servo motor, a ball lead screw and a linear slide rail, and the slide table group drives the film roller and the vacuum suction cup respectively, and the output end of the servo motor is connected with the ball lead screw, and the ball lead screw and the ball lead screw The linear slide rails are connected, and the servo motor is connected to the control system through a programmable controller; wherein the film roller is an antistatic roller, and the foil roller is provided with a stainless steel support roller. The screen film applicator according to claim 1, further comprising a blower that supplies a vacuum to the vacuum chamber. The screen film applicator according to claim 2, further comprising a vacuum pump that supplies a vacuum to the vacuum chuck. The screen film applicator according to claim 1, further comprising a vacuum pump that supplies a vacuum to the vacuum chuck. A screen-type filming device according to claim 3 or 4, wherein a pressure switch and a ruler are provided on the outer side wall of the vacuum cage. The screen type film sticking device according to claim 1, wherein the screen plate is subjected to a plurality of times of coating and standing to dry, and finally exposed and washed to make the thickness of the filler layer equal to the total thickness of the screen. A screen-type filming method comprising the following steps: The first step: first withdrawing the gas inside the vacuum cage to maintain the negative pressure, and then raising and vacuuming the vacuum chuck, and sucking the diaphragm of the read position through the robot arm and placing it on the vacuum cage, the vacuum suction tray is separated The screen plate absorbs the film to be attached; the second step: after tearing off the protective film on the surface of the film to be attached by the tear film mechanism, the vacuum net box is raised to bring it close to the liquid crystal panel, and is stopped after maintaining a certain distance; The third step: the film roller moves up and moves, and pressurizes the film and the liquid crystal panel. After the film roller exceeds the bonding range, it returns to the original point to complete the entire operation procedure.