TWI458403B - Roll coater - Google Patents

Description

Roller coating device

The present invention relates to the field of coating technology, and more particularly to a roller coating device for circuit board printing.

Printed circuit boards have been widely used due to their high assembly density. For application of the circuit board, please refer to the literature Takahashi, A.Ooki, N.Nagai, A.Akahoshi, H.Mukoh, A.Wajima,M.Res.Lab,High density multilayer printed circuit board for HITAC M-880,IEEE Trans .on Components, Packaging, and Manufacturing Technology, 1992, 15(4): 1418-1425.

In the production process of a circuit board, it is usually required to form a full-face solder resist layer or a photoresist layer on the surface of the circuit board. When the entire surface of the solder resist layer or the photoresist layer is applied, it is usually applied by a roll coater. At the time of coating, the viscosity of the ink material for coating increases due to the continuous rotation of the roller. In the prior art, the viscosity of the ink is generally reduced by adding an organic solvent to the ink. However, as the coating continues, the solvent in the ink evaporates, so that the viscosity of the ink is not easily controlled, and the uniformity of the obtained coating layer is poor. Adding an organic solvent causes an increase in the production cost of the circuit board, and is likely to cause Environmental pollution.

In view of this, it is necessary to provide a roller coating device to be able to control the coating oil. The viscosity of the ink.

A roller coating device for coating a substrate. The substrate has a first coated surface and a second coated surface opposite the first coated surface. The roller coating device includes a first roller, a second roller, a first scraper, a second scraper, a first carrier, a second carrier, and a controller. The first carrier tray and the second carrier tray are both used to carry ink. The first carrier disk is in contact with the first roller, and the second carrier disk is in contact with the second roller. The first roller and the second roller are disposed adjacent to each other and parallel to each other, and the first roller and the second roller are located between the first carrier tray and the second carrier tray. The first roller is used for rolling the ink of the first carrier tray to the first coating surface of the substrate, and the second roller is for applying the second coating of the ink of the second carrier tray to the second coating of the substrate. surface. The first scraper and the second scraper are disposed adjacent to each other and are parallel to each other, and the first scraper is located above the first roller for smoothing the ink coated on the first coated surface by the first roller. The second scraper is located above the second roller for smoothing the ink applied to the second coated surface by the first roller. A first temperature sensor and a plurality of first heating resistor wires are disposed in the first carrier. The first carrier tray includes a first carrier plate and a first stop plate that are vertically connected. One end of the first carrier plate is in contact with the first roller. The first stop plate is disposed at the other end of the first carrier plate away from the first roller. The first carrier plate is parallel to the first doctor blade. The first carrier plate has opposing first and second surfaces. The first surface is for carrying ink. The first temperature sensor is exposed to the first surface. The plurality of first heating resistor wires are disposed on the first carrier board. A second temperature sensor and a plurality of second heating resistor wires are disposed in the second carrier. The second carrier tray includes a second carrier plate and a second stop plate that are vertically connected. One end of the second carrier plate is in contact with the second roller. The second stop plate is disposed at the other end of the second carrier plate away from the second roller. The second carrier plate is parallel to the second doctor blade. The second carrier plate has opposing third and fourth surfaces. The third table The face is used to carry ink. The second temperature sensor is exposed to the third surface. The plurality of second heating resistor wires are disposed on the second carrier board. The controller is connected to the first temperature sensor, the second temperature sensor, the plurality of first heating resistor wires and the plurality of second heating resistor wires, and the first temperature sensor is configured to sense the first carrier disk The temperature of the ink inside, the second temperature sensor is for sensing the temperature of the ink in the second carrier, and the controller controls whether the first heating resistor wire is based on the result sensed by the first temperature sensor Heating the ink in the first carrier, the controller further controlling whether the second heating resistor wire heats the ink in the second carrier according to the result sensed by the second temperature sensor, so that the first roller and the second The viscosity of the roller coated ink meets the requirements.

The coating device provided by the technical solution has heating resistor wires and a temperature sensor respectively disposed in the first carrier tray and the second carrier tray, and is heated according to the temperature sensed by the temperature sensor during coating. The electric resistance wire heats the ink in the first carrier tray and the second carrier tray, so that the viscosity of the ink for coating can meet the requirements, and the yield of substrate printing is provided.

20‧‧‧Substrate

21‧‧‧First coated surface

22‧‧‧Second coated surface

100‧‧‧Roller coating device

110‧‧‧First wheel

120‧‧‧Second wheel

130‧‧‧First carrier

131‧‧‧First carrier board

132‧‧‧First stop

1311‧‧‧ first surface

1312‧‧‧ second surface

1313‧‧‧First temperature sensor

1314‧‧‧First heating resistor wire

140‧‧‧Second carrier

141‧‧‧Second carrier board

142‧‧‧second stop baffle

1411‧‧‧ third surface

1412‧‧‧ fourth surface

1413‧‧‧Second temperature sensor

1414‧‧‧second heating resistor wire

150‧‧‧First ink stop

160‧‧‧Second ink stop

170‧‧‧first scraper

180‧‧‧second scraper

190‧‧‧claw

191‧‧‧First claw

192‧‧‧second claw

101‧‧‧ Controller

FIG. 1 is a schematic perspective view of a roller coating device provided by an embodiment of the present technical solution.

Figure 2 is a cross-sectional view taken along line II-II of Figure 1.

FIG. 3 is a schematic perspective view of a roller coating device provided by an embodiment of the present technical solution for coating a substrate.

Referring to FIG. 1 and FIG. 2 together, an embodiment of the present technical solution provides a roller coating device 100 for coating opposite sides of a substrate to be coated. The roller coating device 100 includes a first roller 110, a second roller 120, and a first carrier. The disc 130, a second carrier tray 140, two first ink stops 150, two second ink stops 160, a first scraper 170, a second scraper 180, a jaw 190 and a controller 101. Of course, the roller coating apparatus 100 further includes an organic table (not shown) for carrying or mounting the above components.

The first roller 110 and the second roller 120 are both disposed adjacent to each other in the horizontal direction, and the central axis of the first roller 110 and the central axis of the second roller 120 are parallel to each other. The gap width between the first roller 110 and the second roller 120 should correspond to the thickness of the substrate to be coated. The surfaces of the first roller 110 and the second roller 120 are capable of adsorbing ink for printing.

The first carrier tray 130 is disposed on a side of the first roller 110 away from the second roller 120. The first carrier tray 130 is configured to carry the ink to be printed by the first roller 110 and excess ink adhered on the first roller 110. scrape. The first carrier tray 130 includes a first carrier plate 131 and a first stop plate 132 disposed substantially vertically. The first carrier plate 131 is substantially horizontally disposed. The longitudinal direction of the first carrier plate 131 is parallel to the extending direction of the central axis of the first roller 110, and one side of the first carrier plate 131 is adjacent to the first roller 110. The first carrier plate 131 has opposing first and second surfaces 1311, 1312. A first temperature sensor 1313 is disposed on a side of the first carrier 130 adjacent to the first surface 1311. The first temperature sensor 1313 is exposed from the first surface 1311, and the first temperature sensor 1313 is used to sense the first The temperature of the ink carried in a carrier disk 130. On a side of the first carrier plate 131 adjacent to the second surface 1312, a plurality of first heating resistor wires 1314 are disposed. It can be understood that the plurality of first heating resistor wires 1314 can also be disposed inside the first carrier plate 131. When the plurality of first heating resistor wires 1314 are connected to the power source, heat can be generated to increase the temperature of the ink carried in the first carrier tray 130 and the first carrier tray 130. The first stop plate 132 is located at the first carrier plate 131 away from the first roller 110 One side extends from the first surface 1311 of the first carrier plate 131 in a direction away from the first surface 1311. Preferably, the first carrier tray 130 is made of a metal material having good heat conduction properties. When heating is performed using the first heating resistor wire 1314, heat can be quickly transferred to the ink carried by the first carrier plate 131.

The two first ink stops 150 are disposed on the first carrier plate 131 and located between the first roller 110 and the first stop plate 132, so that the first carrier plate 131, the first roller 110, and the first stop plate 132 and the two 0th ink stops 150 together form a receiving space, and the ink is defined in the receiving space. The distance between the two first ink stops 150 is less than the length of the first roller 110. The width of the adhered ink on the surface of the first roller 110 can be controlled by adjusting the distance between the two first ink stops 150 to accommodate coating of substrates of different sizes.

The first scraper 170 is disposed above the first roller 110 for flattening the ink coated on the substrate by the first roller 110 so that the ink is evenly distributed on the substrate. The first scraper 170 and the first roller 110 are disposed in parallel with each other. The first scraper 170 may be made of a material such as rubber.

The second carrier 140 is disposed on a side of the second roller 120 away from the first roller 110. The second carrier 140 is configured to carry the ink to be printed by the second roller 120 and excess ink adhered on the second roller 120. scrape. The second carrier tray 140 includes a second carrier plate 141 and a second stop plate 142 that are disposed substantially vertically. The second carrier plate 141 is disposed substantially horizontally, the length direction of the second carrier plate 141 is parallel to the extending direction of the second roller 120, and one side of the second carrier plate 141 is adjacent to the second roller 120. The second carrier plate 141 has opposing third and fourth surfaces 1411, 1412. A second temperature sensor 1413 is disposed on a side of the second carrier 140 adjacent to the third surface 1411. The second temperature sensor 1413 is exposed from the third surface 1411, and the second temperature sensor 1413 is used to sense the first The temperature of the ink carried in the second carrier tray 140. On a side of the second carrier 140 adjacent to the fourth surface 1412, a plurality of second heating resistor wires 1414 are disposed. It can be understood that the plurality of second heating resistor wires 1414 can also be disposed inside the second carrier plate 141. When the plurality of second heating resistor wires 1414 are connected to the power source, heat can be generated to increase the temperature of the ink carried in the second carrier tray 140 and the second carrier tray 140. The second stop plate 142 is located on a side of the second carrier plate 141 away from the second roller 120 and extends from the third surface 1411 of the second carrier plate 141 in a direction away from the third surface 1411. Preferably, the second carrier tray 140 is made of a metal material having good heat conduction properties. When heating is performed using the second heating resistor wire 1414, heat can be quickly transferred to the ink carried by the second carrier plate 141.

The two second ink stops 160 are disposed on the second carrier plate 141 and located between the second roller 120 and the second stop plate 142, so that the second carrier plate 141, the second roller 120, and the second stop plate The 142 and the two second ink stops 160 together define a receiving space, and the ink is defined in the receiving space. The distance between the two second ink stops 160 is less than the length of the second roller 120. The width of the adhered ink on the surface of the second roller 120 can be controlled by adjusting the distance between the two second ink stops 160 to accommodate coating of substrates of different sizes.

The second scraper 180 is disposed above the second roller 120 and is parallel to the first scraper 170. The first scraper 170 is adjacent to the second scraper 180, and the gap width between the first scraper 170 and the second scraper 180 should be substantially equal to the thickness of the coated substrate. That is, the distance between the first scraper 170 and the second scraper 180 is substantially equal to the distance between the first roller 110 and the second roller 120. The second doctor blade 180 is used to flatten the ink coated on the substrate by the second roller 120 so that the ink is evenly distributed on the substrate. The second scraper 180 and the second roller 120 are disposed in parallel with each other. The second scraper 180 may be made of a material such as rubber.

The jaws 190 are disposed above the first blade 170 and the second blade 180 for clamping and driving the upper portion of the substrate to be coated to complete the coating. In the present embodiment, the jaw 190 includes a first claw body 191 and a second claw body 192 which are disposed opposite each other. When the first claw body 191 and the second claw body 192 are driven close to each other, the substrate therebetween can be clamped.

The controller 101 is connected to the first temperature sensor 1313, the second temperature sensor 1413, the plurality of first heating resistor wires 1314, and the plurality of second heating resistor wires 1414, and the controller 101 senses according to the first temperature sensor 1313. As a result of the measurement, it is controlled whether the first heating resistor wire 1314 heats the first carrier tray 130. The controller 101 controls whether the second heating resistor wire 1414 heats the second carrier tray 140 according to the result sensed by the second temperature sensor 1413.

Referring to FIG. 3, the roller coating device 100 of the present technical solution is used to coat opposite surfaces of the substrate 20. The substrate 20 has opposing first coated faces 21 and second coated faces 22. During the coating process, under the driving of the clamping jaw 190, the coated substrate 20 is located between the first roller 110 and the second roller 120, the first roller 110 rotates counterclockwise, and the second roller 120 performs smoothing. When the hour hand is rotated, the ink adhered by the first roller 110 is applied to the first coating surface 21 of the substrate 20, and the ink adhered by the second roller 120 is applied to the second coating surface 22 of the substrate 20. The ink for coating is placed in the first carrier tray 130 and the second carrier tray 140. During the rotation of the first roller 110 and the second roller 120, the ink in the first carrier tray 130 is attached to the surface of the first roller 110. The ink in the second carrier tray 140 is attached to the surface of the second roller 120. When the coating is performed, the viscosity of the ink for coating needs to be adjusted, and when the viscosity of the ink is large, the coating thickness and the streak change are likely to occur. Since the coating time continues for a long time, the solvent in the ink volatilizes, causing the viscosity of the ink to increase. The viscosity of the ink used for coating will become smaller as the temperature increases. Passing through the first temperature sensor disposed in the first carrier 130 1313 and a second temperature sensor 1413 disposed in the second carrier 140 sense the temperature of the ink. The controller 101 controls whether the first heating resistor wire 1314 heats the first carrier tray 130 according to the sensed temperature, and controls whether the second heating resistor wire 1414 heats the second carrier tray 140, so that the ink for coating is maintained at The temperature that meets the viscosity requirements.

The roller coating device 100 provided by the present technical solution is provided with a heating resistor wire and a temperature sensor respectively in the first carrier tray 130 and the second carrier tray 140, and is sensed according to the temperature sensor during coating. At the temperature, the ink in the first carrier tray 130 and the second carrier tray 140 is heated by the heating resistor wire, so that the viscosity of the ink for coating can meet the requirements, and the yield of substrate printing is provided.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be covered by the following claims.

100‧‧‧Roller coating device

110‧‧‧First wheel

120‧‧‧Second wheel

131‧‧‧First carrier board

132‧‧‧First stop

1311‧‧‧ first surface

1312‧‧‧ second surface

1313‧‧‧First temperature sensor

1314‧‧‧First heating resistor wire

141‧‧‧Second carrier board

142‧‧‧second stop baffle

1411‧‧‧ third surface

1412‧‧‧ fourth surface

1413‧‧‧Second temperature sensor

1414‧‧‧second heating resistor wire

150‧‧‧First ink stop

160‧‧‧Second ink stop

170‧‧‧first scraper

180‧‧‧second scraper

190‧‧‧claw

191‧‧‧First claw

192‧‧‧second claw

101‧‧‧ Controller

Claims (9)

A roller coating device for coating a substrate, the substrate having a first coating surface and a second coating surface opposite to the first coating surface, the roller coating device comprising a first roller and a second roller a first scraper, a second scraper, a first carrier and a second carrier, wherein the first carrier and the second carrier are both for carrying ink, and the first carrier is in contact with the first roller, The second carrier is in contact with the second roller, the first roller and the second roller are disposed adjacent to each other and are parallel to each other, and the first roller and the second roller are located between the first carrier and the second carrier. The first roller is used for rolling the ink of the first carrier tray to the first coating surface of the substrate, and the second roller is for applying the ink of the second carrier tray to the second coating surface of the substrate by rolling. The first scraper and the second scraper are disposed adjacent to each other and are parallel to each other, and the first scraper is located above the first roller for scraping the ink coated on the first coated surface by the first roller, the second The scraper is located above the second roller for smoothing the second roller The coated surface ink, wherein the roller coating device further comprises a controller, wherein the first carrier is provided with a first temperature sensor and a plurality of first heating resistor wires, the first carrier disk comprising a vertical a first carrier plate and a first stop plate, one end of the first carrier plate is in contact with the first roller, and the first stop plate is disposed on the other end of the first carrier plate away from the first roller, a carrier plate parallel to the first doctor blade, the first carrier plate having opposing first and second surfaces, the first surface for carrying ink, the first temperature sensor being exposed to the first a surface, the plurality of first heating resistor wires are disposed on the first carrier, the second carrier is provided with a second temperature sensor and a plurality of second heating resistor wires, and the second carrier includes a vertical connection a second carrier plate and a second stop plate, one end of the second carrier plate is in contact with the second roller, and the second stop plate is disposed on the other end of the second carrier plate away from the second roller, the second carrier The plate is parallel to the second scraper, the second carrier plate Having opposite third and fourth surfaces, the The third surface is for carrying ink, the second temperature sensor is exposed to the third surface, the plurality of second heating resistor wires are disposed on the second carrier, the controller and the first temperature The sensor, the second temperature sensor, the plurality of first heating resistor wires, and the plurality of second heating resistor wires are connected, wherein the first temperature sensor is configured to sense a temperature of the ink in the first carrier. The second temperature sensor is configured to sense the temperature of the ink in the second carrier, and the controller controls whether the first heating resistor wire heats the ink in the first carrier according to the result sensed by the first temperature sensor And the controller further controls, according to the result sensed by the second temperature sensor, whether the second heating resistor wire heats the ink in the second carrier tray, so that the viscosity of the ink coated by the first roller and the second roller is satisfied. Claim. The roller coating device of claim 1, wherein the plurality of first heating resistor wires are embedded in the first carrier plate, and the plurality of second heating resistor wires are embedded in the second carrier plate . The roller coating device of claim 1, wherein the plurality of first heating resistor wires are exposed to the second surface, and the plurality of second heating resistor wires are exposed to the fourth surface. The roller coating device of claim 1, wherein the roller coating device further comprises two first ink stops and two second ink stops, the two first ink stops And disposed between the first roller and the first stop plate and located on the first surface of the first carrier plate, the two first ink stops are used to define the length of the ink adhered by the first roller, the two second The ink stop is disposed between the second roller and the second stop plate and is located on the third surface of the second carrier plate, and the two second ink stops are used to define the length of the ink adhered by the second roller. The roller coating device of claim 4, wherein the distance between the two first ink stops is smaller than the length of the first roller, and the distance between the two second ink stops is smaller than the second roller length. The roller coating device of claim 1, wherein a distance between the first roller and the second roller is equal to a distance between the first blade and the second blade, and is equal to the substrate thickness of. The roller coating device of claim 6, wherein a central axis direction of the first roller is parallel to a longitudinal direction of the first blade, and a central axis direction of the second roller is parallel to a second blade Longitudinal direction. The roller coating device of claim 7, wherein the roller coating device further comprises a jaw located above the first blade and the second blade for clamping and pulling the substrate Moving in a direction perpendicular to the central axis of the first roller. The roller coating device of claim 1, wherein the first carrier tray and the second carrier tray are both made of a metal material.