KR100533210B1 - Resin dispensing apparatus - Google Patents

Abstract

The present invention relates to a resin coating device for dispensing a resin such as epoxy for fixing a component such as a chip or an IC on a printed circuit board (PCB) used in home appliances, communication devices or similar products. As a simple structure, various applications are possible depending on the scope of application, and maintenance according to the equipment operation, ease of disassembly and coupling of cleaning parts, reduction of maintenance cost, and use without regard to the type of resin and head The present invention relates to a resin coating device that is easy to check the condition of the device and maximizes the reliability of the device.

The resin spreading apparatus of the present invention includes a robot unit in which a normal drive head is configurable along an XYZ axis, and is configured to dispense resin from the syringe by fixing a syringe containing a resin to the drive head of the robot unit. And an up-down adjustment means for varying the dispensing speed and stroke of the dot rod by converting the rotational power of the servo motor, which is a driving source installed on one side of the drive head, into a linear lifting and lowering motion by cam motion. There is this.

Description

Resin dispensing apparatus

The present invention relates to a resin coating device for dispensing a resin such as epoxy for fixing a component such as a chip or an IC on a printed circuit board (PCB) used in home appliances, communication devices or similar products. As a simple structure, various applications are possible depending on the scope of application, and maintenance according to the equipment operation, ease of disassembly and coupling of cleaning parts, reduction of maintenance cost, and use without regard to the type of resin and head The present invention relates to a resin coating device that is easy to check the condition of the device and maximizes the reliability of the device.

Generally, dispensing viscous solutions (resins) such as epoxy resins for mounting surface-mount components (chips, ICs) on printed circuit boards (PCBs), or semiconductor devices Resin coating devices (dispensers) are commercially available in various techniques in the process of underfilling flip chips by applying and encapsulating chips around the chip to protect against them.

Recently, high speed chip mounters have been developed and commercialized as surface mount machines of more than 65,000 chip / hour due to the high speed of industrial technology. In order to meet such high speed chip mounters, high speed and precision have been required to be improved. .

In particular, the resin coating device used for the surface mounting of the semiconductor chip should ensure the accuracy and rapidity of the solution distribution, and it is possible to reduce the defective rate only when the discharging of the quantitative resin is performed correctly according to the dispensing. Operation for high speed solution dispensing and a high degree of repetitive operation of dispensing the same amount of points or areas within a very small tolerance range is required.

In order to meet these demands, in recent years, an injection pressure of a pump method or a method using a vacuum has been disclosed to increase the discharge speed of a solution (resin).

The present invention is a resin coating apparatus of the pump method of the former method belongs to the scope of the present invention.

In such a resin application device, the amount of the resin (adhesive) to be used needs to be changed depending on the size of the part and the like, and an appropriate amount of application must be applied.

In other words, if the amount is small, the part can't play the role of fixing the part. On the other hand, if the amount is excessive, the adhesive flows over the soldering land, which causes a problem in soldering and a failure to obtain a good electrical connection. Sometimes.

Moreover, the viscosity changes with temperature, and the coating amount of an adhesive agent changes as a result. Therefore, when it is necessary to control the exact coating amount, it is necessary to control the adhesive temperature.

Recently, the resin coating device has a temperature control function, the coating amount can be used by changing the application nozzle according to the size of the parts, and a high precision coating device with a visual recognition function has been developed.

As the application method of this adhesive agent, it should not apply to one side under a component, Generally, the method of apply | coating an adhesive agent on a some small dot and mounting a component is used. In this case, since each dot becomes small, the influence becomes small even if the application amount varies slightly.

However, when the size of a part is large, it is possible to respond by increasing the number of dots.

This is even more the case for underfill processes.

In addition, depending on the viscosity, thixotropy (shape retention), flow characteristics, temperature stability, and tackiness of the adhesive (resin) to be applied, the setting conditions of the resin coating device to be operated will vary. Application speed) has the most influence.

However, in the past, the compatibility of the resin (adhesive) in accordance with the characteristics of the resin (adhesive) is not provided as a compatible equipment, the implementation of the equipment is very complicated, the difficulty of disassembly and assembly of the cleaning parts according to the applied resin, the stroke of the dot rod ), The complexity of the adjustment and the implementation of the shock-absorbing function of the tip is very complicated, and the replacement work of the application needle is complicated.

That is, in recent years, a high speed chip mounter has been commercialized, and a high speed coating apparatus that can actively cope with such a situation is required. However, a conventional coating apparatus is very complicated in construction, and has a disadvantage in weighting and bulking up equipment. Due to the frequent defects and maintenance required during the operation period, the disadvantages of difficult disassembly and assembly of the equipment after use, and the separation work due to the cleaning work of the cleaning parts had a difficult disadvantage.

The object of the present invention is to apply high speed quantitative resin (adhesive) in response to the high speed chip mounter, which is commercially available in recent years, so that it can be applied to more advanced surface mount technology, and the characteristics of the resin applied by simple parts replacement Dispensing speed can be implemented according to the present invention to provide a resin coating device that can be used as a universal device.

An object of the present invention is to provide a resin coating device that can be used by a simple adjustment and easy replacement of the dot rod and needle according to the type of resin applied to the surface mounting technology to minimize convenient workability and product defect rate Is in.

An object of the present invention is to provide a resin coating device that maximizes the convenience of operating the equipment is provided by easy disassembly and cleaning of the cleaning parts in the equipment operation process.

The present invention is to provide a resin coating device that can maximize the reliability of the equipment by damping the shock and vibration and noise as well as the impact on the tip even in the high-speed lifting operation of the dot rod.

The resin spreading apparatus of the present invention includes a robot unit in which a normal drive head is configurable along an XYZ axis, and is configured to dispense resin from the syringe by fixing a syringe containing a resin to the drive head of the robot unit. And an up-down adjustment means for varying the dispensing speed and stroke of the dot rod by converting the rotational power of the servo motor, which is a driving source installed on one side of the drive head, into a linear lifting and lowering motion by cam motion. There is this.

The up-down adjusting means constitutes a cam follower for vertically raising a predetermined stroke by a rotational motion of a cylindrical cam bolted and detached to a linkage pulley that receives rotational power of a servomotor installed at one side of a body of a drive head. and,

The cam follower is subjected to downward elasticity by a compression spring seated between the support plate assembled on the upper part of the body, and penetrates the central shaft hole of the support plate to seat the lower part of the spline shaft on the upper part of the cam follower. A spline assembly for fixing the outer cylinder by bolt assembly,

The cam follower, spline penetrates through the central shaft hole of the interlocking pulley, cylindrical cam, cam follower, and spline shaft, and is stepped at the lower portion of the central shaft hole of the cam follower and protrudes from the upper portion of the spline shaft. It consists of a connecting rod assembled to move together with the shaft.

The connecting rod is configured to be connected to the dot rod of the dotting nozzle means formed at the lower portion thereof, so that the cam follower strikes the resin filled with the dot rod by the lifting operation by the cam motion of the cylindrical cam to provide dispensing through the needle. In addition, by the forward and reverse rotation of the cylindrical cam (thermomotor control), the dot rod may implement a valve function to block or open the flow of the resin.

The up-down adjusting means adjusts the elastic force of the compression spring configured on the top to adjust the lifting speed and the hitting strength of the dot rod to provide effective dispensing according to the resin used.

In addition, the dot rod connected to the up-down adjusting means constitutes a damping means at its connection portion, thereby minimizing vibration and noise by buffering the impact strength on the tip according to stroke adjustment and strike of the dot rod.

Specific embodiments of the present invention having such features will be described in detail with reference to the accompanying drawings.

As shown in Figures 1 to 6, the resin coating apparatus of the present invention is mounted on a conventional robot unit along the XYZ axis, the body 100 of the conventional drive head is variable and the resin is connected to the body by a removable material The syringe 140 containing 150, the servo motor 110 installed on one side of the body 100, and the rotational power of the servo motor are transmitted to the timing belt 130 to move the rotary motion straight up and down. The dotting nozzle means 300 includes an up-down adjusting means 200 for converting to an exercise, and a dot rod 320 connected to the up-down adjusting means.

The body 100 of the drive head is assembled with a support bracket 102 on one side of the support 101 protruding from the center portion, the servo motor 110 is bolt-assembled.

The up-down adjustment means 200,

The interlocking pulley 220 is axially coupled to the plurality of bearings 103 and 103 accommodated and assembled by the bearing bracket 107 to the driving pulley 120 and the support 101 of the servo motor 110, and thus the timing belt 130. Of the cylindrical cam 210 is bolted to the upper portion of the interlocking pulley as a removable material,

As the upper portion of the cylindrical cam, a cam follower 230 for vertically raising a predetermined stroke in response to the rotational operation is assembled.

The lower spring plate 246 is seated on the upper part of the cam follower, and the support plate 240 is installed on the upper part of the body 100 in the protruding direction of the support base 101 by bolt assembly, and the lower part of the support plate. The upper spring plate 245 is seated in, but the compression spring 250 is provided between the lower spring plate 246 and provided with a downward resilience force,

The spline assembly 260 is installed by mounting the lower portion of the spline shaft 261 to the upper portion of the cam follower 230 through the central shaft hole of the support plate 240 and the outer cylinder 262 by bolt assembly.

The linkage pulley 220, the cylindrical cam 210, the cam follower 230, the spline shaft through the central shaft hole of the 261, the lower portion of the step 232 formed in the central shaft hole of the cam follow 230 Protruding the upper part in the stepped state and screwed with the nut 271 at the upper threaded portion of the spline shaft 261 to assemble the lifting connecting connecting rod 270 together with the cam follow 230 and the spline shaft 261. It is configured.

The support plate 240 is assembled without flow in the body 100 by bolt fastening with support rods 108 and 108 on both sides of the front, which are erected by bolt fastening from a central support 101, and thus the compression spring 250 is burnt. It is installed firmly to cope with power,

The cam follower 230 has a setting screw hole 233 penetrates the central shaft hole in a horizontal direction on an upper side thereof and is firmly screwed with the lower portion of the spline shaft 261 and the setting screw 234 to prevent rotation. It is supposed to carry out only the lifting movement.

As shown in FIGS. 3 and 10, the cylindrical cam 210 partitions and protrudes a plurality of cam protrusions 211 having an inclined surface 212 upward in one direction at a predetermined interval in the circumferential direction.

At this time, the cam protrusion 211 is preferably in the range of 2 to 4, it may be formed more.

In addition, the cam follower 230 is configured by axially coupling the roll bearings 231 and 231 sliding with the inclined surface 212 of the cam protrusion 211 in both directions.

As mentioned above, the cylindrical cam 210 is rotated at the same time by the interlocking pulley 220 in conjunction with the rotation of the servo motor (110).

Accordingly, the cam follower 230, which is in contact with the cam protrusion 211 of the cylindrical cam 210, rises in the vertical direction while the roll bearings 231 and 231 slide the inclined surface 212. As a result, the cam follower 230 ) Is forcibly winning and rising the repulsion force of the compression spring 250 supported on the top to pull up the connecting rod 270 in a state in which the spline shaft 261 of the spline assembly 260 is prevented from rotating,

When the roll bearings 231 and 231 descend from the top of the inclined surface 212 and descend, the connecting rod 270 is reversed again by the elastic force of the compression spring 250. The linear descending operation of descending with 230 is performed.

In addition, the increase in the cam projection 211 of the cylindrical cam 210 will increase the lifting speed of the connecting rod 270 in proportion.

For example, when the rotational speed of the servo motor 110 is 3000 rpm, the increase in the number of two, three and four cam protrusions 211 is 3000 × 2 = 6,000 cycles / min, 3000 × 3 = 9,000 The speed increases to cycle / min, 3000 × 4 = 12,000cycle / min.

At this time, between the support plate 240 and the upper spring plate 245 by screwing the spring force adjustment nut 280 to the threaded portion 241 of the support plate 240 by the lifting screw rotation the compression spring 250 It is configured to adjust the downward elasticity force of).

The spring force adjusting nut 280 is screw holes (281, 281) in both horizontal directions and the setting screw (282, 282) is screw-assembled to maintain a firm fixed state by screw tightening after the lifting adjustment.

The dotting nozzle means 300 is configured to face the lower portion of the up-down adjustment means 200, detachable to the lower support 104 having an assembly groove 105, the center portion is open to the lower portion of the body 100. And housing 310 assembled from materials.

That is, the airtight holding hole 311 formed in the upper portion and the filling hole 313 formed in the screw protrusion 312 protruding from the lower portion is formed in communication, the connection line 160 of the syringe 140 is assembled resin Inlet hole 314 is communicated in the horizontal direction and the housing 310 is assembled to the lower support 104, the removable material,

Wraps the central portion of the dot rod 320 connected to the connecting rod 270 as an assembly material and fixes the lower portion 332 to the screw portion 322 formed under the central portion via the stopper ring 333. Screw assembly with a nut 334 is accommodated in the hermetic holding hole 311, the upper portion 331 is tightly fixed to the step 315 of the hermetic holding hole 311 by the housing cap 340 is pulled in An elastic bellows sealing mill 330 is installed to block the outflow of the filled resin 150,

The filling hole 313 of the screw projection 312 is inserted into the airtight holding from the bottom, the resin guide hole 351 is inserted into the tip portion of the dot rod 320 and the resin discharge hole 352 of a small diameter is in communication The formed rod guide 350 is installed,

The needle hole 361 penetrates in the center thereof, and is assembled with the screw protrusion 312 so that the needle cap 360 tightly fixes the rod guide 350.

The housing 310 is assembled with a detachable material by a setting screw 106 which is formed with a setting groove 316 opposite to both sides of the housing and is assembled to a setting screw groove formed to face the lower support 104.

 Meanwhile, the connecting rod 270 and the dot rod are connected to each other by the damping means 290.

The damping means 290 is integrally formed at the lower end of the connecting rod 270 to form a damping groove 273 in the lower portion and the expansion head 272 having a screw portion on the outside,

An expansion head 321 integrally formed at an upper end of the disc-shaped buffer member 291 and the dot rod 320 inserted into the damping groove 273;

It is composed of a connection fixing nut 292 is screw-assembled to the screw portion in the state prevented from being separated by the expansion head 321 through the center through the lower portion of the dot rod 320.

The damping means 290 is a stroke of the dot rod 320 which is operated by lifting and lowering integrally with the connecting rod 270 by the height size of the disk-shaped buffer member 291 inserted into the damping groove (273). The adjustment as well as the impact strength of the seat surface 353 of the rod guide 350 is buffered.

The disk-shaped buffer member 291 is excellent in elastic strength, it is preferable to use the aging resistance, oil resistance, wear-resistant urethane rubber.

In the present invention, in the state where the usual cam follower 230 of the up-down adjustment means 200 is lowered, the end of the dot rod 320 of the dotting needle means 300 of the rod guide 350 Filled in the filling hole 313 of the housing 310 by blocking the resin discharge hole 352 by the downward elasticity of the compression spring 250 to the seat surface 353 formed at the bottom of the resin Anne hole 351 The flow of the resin 150 is blocked.

At this time, the roll bearings (231, 231) of the cam follower 230, as shown in Figure 11a, to the lowest inclined surface 212 of the cam projection 211 of the cylindrical cam 210 and a predetermined height gap (Ha) In the spaced apart state, the elastic force of the compression spring 250 is intact to the dot rod 320 as it effectively blocks.

In order to adjust the stroke of the dot rod 320, as mentioned above, the height of the disk-shaped buffer member of the damping means 290 connected to the connecting rod 270, that is, the height dimension when the stroke is shortened If large is replaced and the stroke is lengthened, the smaller one may be used.

The stroke adjustment of the dot rod 320 by the damping means 290 is to be varied according to the characteristics of the resin 150 applied to the dispensing operation to ensure the versatility and convenience of the device.

According to the present invention, the cylindrical cam 210 is slid in one direction along the inclined surface 212 of the cam protrusion 211 by the roll bearing 231 of the cam follower 230 by the forward rotation of the servo motor 110. While going straight up and downward movement by the compression spring 250 by pushing the dot rod 320 to the resin guide hole 351 of the rod guide 350 by hitting the resin discharge hole Discharge to 352 to implement the on / off valve function in addition to the dispensing operation by the pump function.

That is, the cylindrical cam 210 is inclined surface of the cam protrusion 211 to the roll bearing 231 of the cam follower 230 when controlled by the rocking motion of the servo motor 110 by forward and reverse rotation. A process of closely contacting the dot rod 320 at the seat surface 353 of the resin guide hole 351 of the rod guide 350 by repeatedly sliding in the section from the lowest point to the highest point (on / on) The resin discharge hole 352 can be opened and closed.

The valve function of the present invention can be used for the resin 150 to be applied has a low viscosity characteristics, and also compressed by configuring a supply path (not shown) of compressed air on one side of the needle cap (366) When the air is blown and used as the on / off valve of the flux, it is possible to utilize the dispensing operation by atomizing the flux.

In the present invention, by controlling the rotation of the cylindrical cam 210 by the servo motor 110, extremely precise stroke adjustment is possible, and in particular, the cam follower 230 by controlling the rotation angle of the cylindrical cam 210. By adjusting the distance of the sliding section of the roll bearing 231), any stroke can be adjusted at any moment to realize the best condition for various applications.

In particular, the present invention is the rod type currently commercialized is limited in speed control because the use of a cylinder, the impact of the end portion (dot rod, road guider) has a large impact effect, frequent replacement of parts, the quality is reduced And by using the servo motor drive source that can be freely adjusted the rotation angle by applying the cam drive method, the loss of parts can be minimized by freeing the speed control and cushioning the shock of the end portion as a damper structure.

As described in detail above, the present invention has a wide range of application by eliminating the disadvantage that the fine adjustment of the stroke of the dot rod caused by the conventional cylinder type is possible, and it is possible to replace a small part as one device according to the type of resin applied. It has the effect of providing versatility, and it is a simple structure that disassembles and assembles the washing parts as well as the convenience of using the equipment due to the ease of cleaning. By implementing the attenuation function to provide the effect of ensuring the reliability of the device is implemented.

1 is a perspective view of the present invention,

2 is an exploded perspective view of the present invention;

3 and 4 is an enlarged view of a part excerpt of FIG.

5 is an assembled sectional view of the present invention, a front sectional view,

6 is a side cross-sectional view of the assembled cross-sectional view of the present invention;

7 is an enlarged view of an excerpt “F” of FIG. 5;

8 is an enlarged view of an excerpt “G” of FIG. 5;

9 is an enlarged view of an “H” portion of FIG. 5;

10 is an embodiment of a cylindrical cam that is a component of the present invention,

10A is a configuration diagram of a two-division cylindrical cam,

10b is a configuration diagram of a three-division cylindrical cam,

10c is a configuration diagram of a four-segment cylindrical cam,

11 is an explanatory diagram according to the operation of the cylindrical cam of the present invention,

Figure 11a is an explanatory view of the operation of the pump function according to the dispensing,

11B is an operation explanatory diagram according to the valve function.

** Explanation of symbols for main parts of drawings **

100: body 110: servo motor

200: up-down adjustment means 210: cylindrical cam

211: cam projection 212: inclined surface

230: Cam Followers 231: Roll Bearings

240: support plate 250: compression spring

260; Spline Assembly 270: Connecting Rod

300: dotting needle means 310: housing

320: dot rod 330: bellows airtight ring

350: Road Guide 360: Needle Cap

Claims (13)

A resin coating apparatus comprising a robot unit in which a normal driving head which is variable along an X-Y-Z axis is assembled, and configured to dispense a resin from the syringe by fixing a syringe containing a resin to the driving head of the robot unit. Servo motor which is a drive source installed on one side of the body of the drive head, Up-down adjustment means for varying the dispensing speed and stroke for receiving the rotational power of the servo motor and converting it into a linear lifting and lowering motion by cam motion; Resin coating device comprising a dot rod assembled to the up-down adjustment means, comprising a dotting needle means connected to the syringe on one side and assembled to the body by a removable material. The method of claim 1, The up-down adjusting means, Cylindrical cam bolted to the interlocking pulley to receive the rotational power of the servo motor detachable material, and A cam follower for vertically raising a predetermined stroke by the rotational motion of the cylindrical cam, A compression spring provided between the lower spring plate seated on the upper part of the cam follower and the upper spring plate seated on the lower part of the support plate assembled on the upper part of the body to provide downward elasticity; A spline assembly which penetrates the central shaft hole of the support plate and seats the lower portion of the spline shaft on the upper portion of the cam follower and fixes the outer cylinder by bolt assembly; The cam follower, spline penetrates through the central shaft hole of the interlocking pulley, cylindrical cam, cam follower, and spline shaft, and is stepped at the lower portion of the central shaft hole of the cam follower and protrudes from the upper portion of the spline shaft. Resin coating device characterized in that consisting of a connecting rod assembled to move up and down with the shaft. The method of claim 2, The cylindrical cam projects a plurality of cam projections inclined upwardly in one direction to the top in radially spaced intervals, and the cam follower has a horizontally opposite roll bearing that slides with the inclined surface of the cam projections in both directions. Resin coating device, characterized in that made by combining. The method of claim 3, Resin coating apparatus characterized in that the cam projection of the cylindrical cam is formed of 2 to 4. The method of claim 2, And a spring force adjustment nut is screwed to the threaded portion of the support plate to adjust the downward resilience force of the compression spring by lifting and lowering screw rotation between the support plate and the upper spring plate. The method according to claim 1 or 2, And the connecting rod and the dot rod are connected to each other by damping means. The method of claim 6, The damping means is integrally formed at the lower end of the connecting rod to form an attenuating groove in the lower portion and having an external screw thread; An expansion head integrally formed at an upper end of the disc-shaped shock absorbing member and the dot rod inserted into the damping groove; Resin coating apparatus comprising a connection fixing nut which is screw-assembled through the center through the center of the lower portion of the dot rod screwed to the screw portion in a state that the separation is prevented to the lower portion by the expansion head. The method of claim 7, wherein And said damping means is adapted to adjust the stroke of said dot rod by the height of said disk-shaped buffer member. The method of claim 8, The disk-type buffer member is a resin coating device, characterized in that made of urethane. The method of claim 1, The dotting needle means is formed in the airtight holding hole formed in the upper portion and the filling hole formed in the screw projection protruding in the lower portion is formed, the resin inlet hole is assembled to the connection line of the syringe is in communication with the filling hole in the horizontal direction to the body The housing is assembled with a removable material, Wrap the central part of the dot rod and screw the lower part through the stopper ring and screw the lower part through the stopper ring to be accommodated in the airtight hole, and the upper part is sealed by the housing cap. Elastic bellows sealing and tightly fixed to the stepped portion of the resin to block the upper flow of the resin, A rod guide which is fitted into the filling hole of the screw protrusion from the lower part by airtightness, and communicates with a resin guide hole into which the tip portion of the dot rod is inserted and a resin discharge hole of a small diameter; Resin coating device comprising a needle cap penetrates the center in the center and the screw protrusion and the screw assembly is fixed to the rod guide. The method of claim 3 or 10, The roll bearing of the cam follower is a resin discharge hole in a state where the tip of the dot rod is in close contact with the seat surface of the resin guide hole of the rod guide in a state where the tip of the dot rod is spaced apart from the bottom slope of the cam protrusion of the cylindrical cam by a predetermined height gap. Resin coating device, characterized in that made to block. The method according to claim 1 or 3 or 10, The cylindrical cam moves up and down while the roll bearing of the cam follower moves in one direction along the inclined surface of the cam protrusion by the forward rotation of the servo motor, thereby hitting the dot rod into the resin guide hole of the rod guide. Resin coating device, characterized in that the dispensing by the pump function by pushing the discharge to the resin discharge hole The method according to claim 1 or 3 or 10, The cylindrical cam is moved up and down while the roll bearing of the cam follower moves up and down the inclined surface of the cam protrusion by forward and reverse rotation of the servo motor, thereby opening the dot rod from the seat surface of the resin guide hole of the rod guide. Resin coating apparatus, characterized in that made to perform the on / off valve function by closing.