KR20130038010A - Dispense apparatus for sheet - Google Patents

Dispense apparatus for sheet Download PDF

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Publication number
KR20130038010A
KR20130038010A KR1020110102630A KR20110102630A KR20130038010A KR 20130038010 A KR20130038010 A KR 20130038010A KR 1020110102630 A KR1020110102630 A KR 1020110102630A KR 20110102630 A KR20110102630 A KR 20110102630A KR 20130038010 A KR20130038010 A KR 20130038010A
Authority
KR
South Korea
Prior art keywords
support shaft
sheet
roll support
buffer sheet
recovery
Prior art date
Application number
KR1020110102630A
Other languages
Korean (ko)
Inventor
반준우
최성우
박근표
Original Assignee
주식회사 아바코
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 아바코 filed Critical 주식회사 아바코
Priority to KR1020110102630A priority Critical patent/KR20130038010A/en
Publication of KR20130038010A publication Critical patent/KR20130038010A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/06—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers
    • B65H5/068—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers between one or more rollers or balls and stationary pressing, supporting or guiding elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1303—Apparatus specially adapted to the manufacture of LCDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1313—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells specially adapted for a particular application

Abstract

PURPOSE: A dispense apparatus for a sheet is provided to apply tension to a buffer sheet between an ACF(Anisotropic Conductive Film) and a pressurization unit and to collect the buffer sheet with predetermined tension. CONSTITUTION: As the amount of a buffer sheet(BS) wound on a collection roller(122) increases, a load is generated. A second driving unit(124) smoothly rotates a collection roller support shaft(120) according to the generation of the load. Therefore, the pressurization level of the buffer sheet on a guide roller(130a,130b) becomes weak. A sensor outputs the detection result of pressurization information to a control unit(150). According to is the detection result, the control unit increases the rotation speed of the collection roller support shaft to enhance the torque of the second driving unit. [Reference numerals] (150) Control unit;

Description

Sheet feeding apparatus {Dispense apparatus for sheet}

The present invention relates to a sheet feeder, and more particularly, to a sheet feeder for supplying a buffer sheet used to attach various chips or packages to a flat panel display substrate such as an LCD and a PDP.

In general, anisotropic conductive film (ACF) is an adhesive on a film in which conductive particles such as metal-coated plastic or metal particles are dispersed. In the field of liquid crystal display (LCD) mounting, driver IC or TCP ( Tape Carrier Packages are widely used to electrically connect panels or printed circuit boards (PCBs). With the recent development of the technology of the liquid crystal display device, the ACF is also rapidly improving the connection reliability and miniaturization of the connection pitch. As a result, it has recently attracted attention as a connection material such as a chip on glass (COG) in which a bare chip is directly mounted on an LCD panel.

As described above, ACF is a double-sided tape material in which a heat-hardened adhesive and a fine conductive ball are mixed therein, and when a high temperature is applied, the conductive ball is destroyed while the conductive ball in the part where the pad (bump) of the circuit pattern contacts is destroyed. The ball is energized with the pad (bump), and the remaining adhesive is filled / hardened on the uneven surface other than the pad (bump) part to be bonded to each other. That is, ACF is a film adhesive which disperse | distributed conductive particles (this is called a conductive ball), such as a metal-coated plastic or metal particle.

When the two media are connected by using such an ACF, the temperature of the thermosetting resin has to be given a constant temperature, pressure, and time, and thus a method of pressurizing the contact surface by heating means is used. That is, after preparing a substrate, pre-bonding the ACF to the substrate by pressing means, removing the protective film from the ACF, and then leaving the sample to be connected thereto and pressurizing by pressing means again, the main bonding by thermal fusion. It is supposed to be.

Conventionally, in the pre-bonding and main bonding as described above, in order to prevent damage to the substrate and the sample by the pressing means, and to prevent the attachment of the ACF and the pressing means, heat resistance such as Teflon sheet or silicon sheet between the pressing means and the ACF. After the sheet, ie, the buffer sheet, prebonding and main bonding were performed.

Such a cushioning sheet is provided to the sheet feeder shown in FIG. 1 in a state of being wound on a reel. The sheet feeder is provided on the work table S on which the substrate P is mounted, the feed roll supporting shaft 10 for mounting the feed roll 12 on which the buffer sheet BS is wound, and the buffer sheet used. And a recovery roll support shaft 20 for mounting the recovery roll 22 for recovering the BS, and a plurality of guide rollers 30 forming a conveying path of the buffer sheet BS. The sheet feeder rotates the feed roll support shaft 10 and the recovery roll support shaft 20 through the driving means 14 and 24 to bind the buffer sheet BS wound on the feed roll 12 to the above-mentioned bonding operation. After use, it is again wound up and collect | recovered by the collection roll 22.

At this time, the supply roll support shaft 10 and the recovery roll support shaft 20 are connected to different driving means to rotate. Usually, the servo motor 14 is connected to the supply roll support shaft 10 and the recovery roll support shaft. An AC torque motor 24 is connected to 20. The servo motor 14 detects the diameter or load of the supply roll 10 by using a displacement sensor 16 or the like provided around the supply roll support shaft 10, and controls the control unit 50 according to the detection result. While the rotational speed of the feed roll support shaft 10 can be precisely controlled through the AC torque motor 24, the rotational speed, that is, after the torque is set, has the characteristic of being driven under the set conditions. .

However, if the radius and the load of the recovery roll 22 increase as the recovery amount of the buffer sheet BS increases, a load is generated on the AC torque motor 24, and the rotational speed of the recovery roll support shaft 20 is slowed. Has a problem. When the rotational speed of the recovery roll support shaft is lowered in this way, the used cushioning sheet BS cannot be recovered smoothly. Thus, as shown in FIG. 2, the tension of the buffer sheet BS is not kept constant between the supply roll 10 and the recovery roll 20, for example, between the pressurizing means 40 and the ACF, so that the wrinkles in the buffer sheet BS are not. Will be created. As a result, it is difficult to pressurize the ACF constantly, and there is a problem in that the high temperature pressurizing means 40 directly contacts the ACF, the substrate P, etc., thereby increasing the defective rate of the product and lowering the productivity.

KR 0810086 B1 KR 20090090762 B1

The present invention provides a sheet feeding apparatus capable of measuring the tension of the buffer sheet to be recovered.

The present invention provides a sheet feeder capable of precise torque control of the drive means.

The present invention provides a sheet feeding apparatus that can reduce the defective rate of the product produced.

A sheet feed apparatus according to an embodiment of the present invention includes a feed roll support shaft for rotatably mounting a feed roll on which a sheet is wound; A recovery roll support shaft spaced apart from the supply roll support shaft, for rotatably mounting a recovery roll for recovering the sheet wound on the supply roll; A plurality of guide rollers provided between the feed roll support shaft and the recovery roll support shaft to form a feed path of the sheet; A sensor provided on at least one of the plurality of guide rollers to detect pressure; And a controller configured to adjust the rotational speed of the recovery roll support shaft according to the pressure detected by the sensor.

In this case, the supply roll support shaft may be formed to be rotated by the drive of the servo motor, a displacement sensor for detecting the amount of the sheet wound on the feed roll is provided around the supply roll support shaft, the servo motor is The rotational speed may be changed according to the amount of the sheet detected by the displacement sensor.

The recovery roll support shaft may be formed to rotate by driving of a servo motor or an AC torque motor.

And at least one sensor may be provided on the guide roller closest to the recovery roll support shaft of the plurality of guide rollers, the sensor is preferably formed so as to detect the pressure for the sheet to press the guide roller. .

In particular, the sensor may be formed of at least one of a load cell and a strain gauge to detect a pressure applied to the guide roller by the sheet.

The sheet feeding apparatus according to the embodiment of the present invention can impart a constant tension to the cushioning sheet provided between the ACF and the pressing means. That is, by monitoring the tension, load and the like of the buffer sheet to be recovered, by adjusting the recovery speed of the buffer sheet used, the buffer sheet can be recovered with a constant tension. In this way, it is possible to improve the productivity by reducing the defective rate of the product produced.

In addition, it is possible to reduce the volume of the recovered buffer sheet to reduce the place for storing it, it can also reduce the cost of transport.

1 is a view schematically showing the structure of a sheet feeding apparatus according to the prior art.
2 is a view showing a problem occurring in the sheet feeding apparatus of FIG.
Figure 3 is a schematic view showing the structure of a sheet feeder according to an embodiment of the present invention.
4 is a view showing an operating state of the sheet feeder according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various different forms, and the present embodiments are only provided to make the disclosure of the present invention complete and to those skilled in the art. It is provided for complete information.

The sheet supply apparatus according to the present invention may be applied to various industries using various kinds of sheets or films, and in the embodiment of the present invention, when attaching a driver IC or a TAB package to a substrate of a flat panel display device such as an LCD or a PDP. A sheet feeder for supplying a cushioning sheet to be used will be described.

3 is a view schematically showing the structure of a sheet feeding apparatus according to an embodiment of the present invention.

Referring to FIG. 3, the sheet supply apparatus is provided on the work table S on which the substrate P is mounted, and a feed roll support shaft for rotatably mounting the supply roll 112 on which the buffer sheet BS is wound. And a recovery roll support shaft for rotatably mounting the recovery roll 122 for recovering the buffer sheet BS wound on the supply roll support shaft 110 and spaced apart from the supply roll support shaft 110. 120, a plurality of guide rollers 130a and 130b provided between the feed roll support shaft 110 and the recovery roll support shaft 120 to form a transfer path of the buffer sheet BS, and a plurality of guides. A sensor 126 provided on at least one of the rollers 130a and 130b to detect pressure applied to the guide rollers 130a and 130b; And a controller 150 for adjusting the rotational speed of the recovery roll support shaft 120 according to the pressure detected by the sensor 126.

The feed roll support shaft 110 is a bar-shaped shaft, and is formed to mount the feed roll 112 wound with a buffer sheet BS having heat resistance, such as a Teflon sheet and a silicon sheet. The first driving means 114 is connected to the supply roll supporting shaft 110 and configured to be rotatable, and the shock absorbing sheet BS wound on the supply roll 112 by rotating the supply roll 112 mounted together with the rotation. Is released at a constant speed to provide a process location, ie, between the ACF and the pressurizing means 140.

The first driving means 114 may be used a variety of means for rotating the feed roll support shaft 110 in accordance with the drive, preferably the buffer sheet (BS) wound on the feed roll 112 is always constant Precise controllable servomotors can be used to provide the process location. At this time, a displacement sensor 116 for detecting the diameter of the feed roll 112, that is, the amount of the buffer sheet BS wound around the feed roll 112 may be provided around the feed roll support shaft 110. As the buffer sheet BS wound on the supply roll 112 is provided as a supply means, the diameter of the supply roll 112 is reduced, and the displacement sensor 116 detects this and outputs a detection result to the controller 150. The controller 150 adjusts the rotational speed of the first driving means 114, that is, the servomotor, according to the detection result. For example, in the initial stage of the process, the amount of the buffer sheet BS wound on the supply roll 112 is large, and thus the supply roll 112 has a relatively large diameter. In this case, since the load of the supply roll 112 is large, the first driving means ( 114 is operated with a relatively large torque, and as the process proceeds, if the amount of the cushioning sheet BS is reduced, the load of the supply roll 112 is reduced, so that the first driving means 114 has a smaller torque than before. Operation is possible. Through this configuration, the first driving means 114 can always rotate the feed roll support shaft 110 at a constant speed. (Example of sensor that can be used as displacement sensor)

The recovery roll support shaft 120 may be spaced apart from the supply roll support shaft 110, and may be formed as a bar shaft like the supply roll support shaft 110. The recovery roll support shaft 120 is equipped with a recovery roll 122 for rewinding and recovering the buffer sheet BS, ie, the used buffer sheet BS, which has passed through the process position. The second driving means 124 is connected to the recovery roll support shaft 120 and is configured to be rotatable. The buffer sheet BS, which is used by rotating the recovery roll 122 mounted together with the rotation, is transported at a constant speed. Wind up and collect.

As the second driving means 124, various means capable of rotating the recovery roll support shaft 120 may be used. Preferably, a motor such as a servo motor or an AC torque motor may be used.

The guide rollers 130a and 130b are provided between the supply roll support shaft 110 and the recovery roll support shaft 120 so that the buffer sheet BS passes through the process position on the supply roll 112 through the recovery roll 122. The transport path of the buffer sheet BS is formed to be recovered. The guide rollers 130a and 130b are formed in a bar-shaft, and are rotatably formed so that the buffer sheet BS may be naturally transported without causing friction.

In addition, the guide rollers (130a, 130b) are each provided with a plurality in the direction of the feed roll support shaft 110 and the recovery roll support shaft 120 so that the buffer sheet (BS) can be conveyed with a constant tension at the process position. good. This configuration allows the buffer sheet BS to be constantly released without being entangled by tension even when the buffer sheet BS is unwound by the supply roll 112, and is tightly wound on the recovery roll 122.

The guide rollers 130a and 130b thus formed may be provided with a sensor 126 for detecting the tension of the buffer sheet BS. The sensor 126 may be formed on any one of the plurality of guide rollers 130a and 130b, but may be formed on the guide roller 130b provided on the recovery roll support shaft 120 side. That is, as described in the problem of the prior art, the feed roll support shaft 110 is always rotated at a constant speed by the servo motor easy to precise control, but the recovery roll support shaft 120 is rotated by the AC torque motor Therefore, as the recovery amount of the buffer sheet (BS) increases, it is required to adjust the appropriate rotational speed.

Therefore, the sensor 126 is formed on the guide roller 130b provided on the recovery roll support shaft 120 to measure the tension of the buffer sheet BS transferred to the recovery roll 122, and the measurement result is controlled by the controller 150. By controlling the operation of the second driving means 124 through the control by the control unit 150 to control the rotational speed of the recovery roll support shaft 120. At this time, the sensor 126 is preferably formed at an optimal position to measure the tension of the buffer sheet (BS) to be recovered, preferably formed on the guide roller (130b) closest to the recovery roll support shaft 120 Good to do.

The sensor 126 measures the degree to which the guide roller 130b is pressed by the buffer sheet BS, and a load cell, a strain gauge, or the like may be used.

The controller 150 is connected to the first driving means 114, the second driving means 124, the displacement sensor 116 and the sensor 126, the detection result output from the displacement sensor 116 and the sensor 126 Received to control the operation of the first driving means 114 and the second driving means (124).

Looking at the method for supplying the buffer sheet (BS) using the sheet feeder according to an embodiment of the present invention configured as described above are as follows.

4 is a view showing a state of use of the sheet feeder according to an embodiment of the present invention.

4 (a) is an initial process for main bonding the AFC prebonded to the substrate S through the pressing means 140, and a buffer sheet BS is provided between the pressing means 140 and the AFC. Is showing. In this case, a large amount of the buffer sheet BS is wound on the supply roll 112, and a relatively small amount of the buffer sheet BS is wound on the recovery roll 122. At this time, the guide rollers (130a, 130b) provided on the recovery roll support shaft 120 side is a certain amount of pressure, that is, the buffer sheet (BS) is wound on the recovery roll 122 while maintaining a constant tension, The two drive means 124 operates with the torque initially set to rotate the recovery roll support shaft 120.

4 (b) shows that the amount of the buffer sheet BS wound on the recovery roll 122 is increased as the process proceeds to some extent. Accordingly, the second driving means 124 may not rotate the recovery roll support shaft 120 smoothly due to an increase in the amount of the buffer sheet BS wound on the recovery roll 122. As a result, the buffer sheet BS is unable to maintain a constant tension, and thus the degree of pressing the guide rollers 130a and 130b is weakened, and the sensor detects this and outputs the detection result to the controller 150.

Referring to FIG. 4C, the control unit 150 determines that the tension of the buffer sheet BS is weakened using the detection result, thereby increasing the torque of the second driving means 124 to support the recovery roll support shaft. Show the state of increasing the rotation speed of 120. The buffer sheet (BS) is tightly wound on the recovery roll 122 is to maintain a constant tension again.

As described above, the sheet feeding apparatus according to the embodiment of the present invention may be provided at a process position while maintaining a constant tension of the cushioning sheet at all times, thereby preventing product defects due to process defects. In addition, it is possible to reduce the volume of the recovered buffer sheet to reduce the place for storing it, it can also reduce the cost of transport.

As described above, in the detailed description of the present invention, specific embodiments have been described. However, various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

110: feed roll support shaft 112: feed roll
114: first driving means 116: displacement sensor
120: recovery roll support shaft 122: recovery roll
124: second driving means 126: sensor
130a, 130b: guide roller 140: pressing means
150:
BS: Buffer Sheet P: Substrate
S: work table

Claims (5)

A feed roll support shaft for rotatably mounting the feed roll on which the sheet is wound;
A recovery roll support shaft spaced apart from the supply roll support shaft, for rotatably mounting a recovery roll for recovering the sheet wound on the supply roll;
A plurality of guide rollers provided between the feed roll support shaft and the recovery roll support shaft to form a feed path of the sheet;
A sensor provided on at least one of the plurality of guide rollers to detect pressure; And
A control unit for adjusting the rotational speed of the recovery roll support shaft according to the pressure detected by the sensor;
Sheet feeder comprising a. The method according to claim 1,
And the recovery roll support shaft is formed to rotate by driving of a servo motor or an AC torque motor. The method according to claim 1,
And at least one sensor provided on the guide roller closest to the recovery roll support shaft among the plurality of guide rollers. The method according to claim 1 or 3,
And the sensor is configured to detect the pressure at which the sheet presses the guide roller. The method according to claim 1 or 3,
And the sensor is at least one of a load cell and a strain gauge.
KR1020110102630A 2011-10-07 2011-10-07 Dispense apparatus for sheet KR20130038010A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110102630A KR20130038010A (en) 2011-10-07 2011-10-07 Dispense apparatus for sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110102630A KR20130038010A (en) 2011-10-07 2011-10-07 Dispense apparatus for sheet

Publications (1)

Publication Number Publication Date
KR20130038010A true KR20130038010A (en) 2013-04-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020110102630A KR20130038010A (en) 2011-10-07 2011-10-07 Dispense apparatus for sheet

Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101695482B1 (en) * 2015-08-31 2017-01-23 글로벌텍(주) Lamination apparatus for flexible display panel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101695482B1 (en) * 2015-08-31 2017-01-23 글로벌텍(주) Lamination apparatus for flexible display panel

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