KR101540701B1 - Stencil feeder of screen printer - Google Patents

Abstract

A stencil supply device of a screen printer according to the present invention comprises a conveyor having a plurality of conveying pins along a back and forth movement path of a belt disposed on both sides thereof; A transfer hole and a fixing hole formed on both sides of the conveyor so as to insert the transfer pin of the conveyor, and a stencil having a charging port for applying a lead solution on the surface; And when the supplied stencil is detected to be located in the work area, the pressing member is engaged with the fixing hole to open both ends of the stencil on both sides and presses the upper and lower sides to maintain the tension, Releasing state and switching to the discharge state.

According to the present invention, since both sides of the stencil from which the outer frames are removed are transported while being supported, and the stencil supplied to the working area is given a tensile force to keep it flat, it is easy to handle, It is possible to operate the stencil automatic supply system in the equipment, and it is possible to shorten the replacement time of the stencil to be replaced according to the shape of the substrate.

Screen printer, stencil, fixing device

Description

[0001] Stencil feeder of screen printer [0002]

The present invention relates to a screen printer, and more particularly, to a screen printer in which both sides of a stencil from which an outer frame has been removed are transported while being supported, and a stencil supplied to a work area is given a tensile force to keep it flat. The present invention relates to a stencil dispenser for a screen printer which can shorten the replacement time of a stencil which needs to be replaced according to the shape of a substrate, because the stencil automatic dispensing system can be operated in the apparatus due to ease of handling.

Generally, a screen printer is a device for applying a cream solder type lead for installing an electronic component such as an integrated circuit (IC) and a resistor in each contact space formed on the surface of a printed circuit board.

The structure of such a screen printer includes a conveyor for conveying the printed circuit board in both directions and a lead placed on the surface of the mask stencil which is moved forward and backward and which has an input hole corresponding to each contact space of the printed circuit board, A camera for checking the positions of the printed circuit board and the mask stencil while moving in the front and rear directions and in the left and right directions, and a camera for wiping each input port of the mask stencil And a cleaning device.

In the operation of the screen printer configured as described above, first, the printed circuit board is moved to the working position through the conveyor, and the position of the recognition mark provided on the printed circuit board and the position of the recognition mark provided on the mask stencil are confirmed by the camera, Adjust the position.

Then, the mask stencil and the squeeze are lowered, and the work conveyor is lowered, and the contact holes of the printed circuit board are provided at the lower portions of the respective input holes of the mask stencil, The space is brought into close contact.

Next, by moving the squeeze blade in the front-rear direction so that the lead positioned at one side of the surface of the mask stencil passes through each of the injection holes of the mask stencil, the lead drops falling into the respective contact holes of the mask stencil Can be applied.

Here, the shape of the mask stencil is determined according to the material, and a filling port for filling a cream solder type lead is formed on the mask stencil. The input port is formed to correspond to a position where the lead is printed on the printed circuit board. Further, the mask stencil is installed in the screen printer in a frame form together with the frame, and is used for printing.

The mask stencil has to be provided with a corresponding mask stencil according to the type of the printed circuit board to be supplied to the screen printer when the screen printing process is performed. Thereafter, the used mask stencil is kept in a storage room until it is used again in the future.

As shown in Figs. 1 and 2, a conventional mask stencil fixing and stretching apparatus is disclosed in 1996-7002385 (European 0 703 859 B1).

However, the above-mentioned conventional mask stencil fixing and stretching apparatus is a method of manually fixing a mask stencil to a frame, which is insufficient in its effectiveness to be included in a screen printer apparatus. In order to replace and clean the mask stencil in a screen printer apparatus The movement function of the mask stencil is required, but the movement function of the mask stencil can not be used in the above conventional technique.

In other words, it was difficult to design a structure for automatically supplying the mask stencil in the equipment. Accordingly, it takes much time to replace the mask stencil according to the type of the substrate. Further, as shown in Fig. 3, since the frame 2 having a predetermined hardness is provided on the outer periphery of the mask stencil 1, it is bulky and difficult to handle.

This makes it difficult to secure the storage space of the mask stencil 1, and it is difficult to clean the mask stencil by the outer frame 2 even when the mask stencil is cleaned. Further, since the process of fixing the stencil to the frame necessarily occurs, there is a problem in that the number of steps increases.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a stencil dispenser in which both sides of a stencil from which an outer frame is removed are transported while being supported, A stencil dispensing apparatus for a screen printer capable of operating a stencil automatic supply system in the apparatus and shortening a stencil replacement time by providing a stencil which is easy to handle, There is a purpose.

To achieve the above object, according to the present invention, there is provided a conveyor comprising: a conveyor having a plurality of conveying fins along a forward and backward movement path of belts disposed on both sides; A transfer hole and a fixing hole formed on both sides of the conveyor so as to insert the transfer pin of the conveyor, and a stencil having a charging port for applying a lead solution on the surface; And when the supplied stencil is detected to be located in the work area, the pressing member is engaged with the fixing hole to open both ends of the stencil on both sides and presses the upper and lower sides to maintain the tension, And a releasing device for releasing the releasing device to the discharging state.

It is preferable that a plurality of fixing members are provided on the upper portion of the belt of the conveyor to fix the lower portion of the conveying pin and support both ends of the stencil.

The belt of the conveyor may be a chain, and it is preferable that the stencil is used in which the frame is removed.

Further, the stencil may be supplied through the conveyor in a state of being wound around the ring bar.

Preferably, the stencil is supplied to the conveyor in a state in which the stencil is pressed by the press rollers corresponding to the upper and lower pressures while the tension is maintained.

The fixing device may include upper and lower plates to which both ends of the stencil are inserted, and a plurality of fixing pin insertion holes corresponding to the fixing holes are formed in the longitudinal direction of the lower plate. A lifting member positioned between the upper and lower plates of the bracket so as to be able to move up and down; A guide block having a plurality of upwardly inclined grooves formed on the front and rear sides thereof along the movement path at an upper portion of the elevation member; And a guide pin which is positioned between the guide blocks and protruded in front and rear directions is slid upward and downward at a diagonal angle along the inclined grooves and a fixing pin protruded upward is inserted into the fixing pin insertion hole through a fixing hole of the stencil And a pressing member that is inserted correspondingly.

Preferably, the fixing hole and the fixing pin have a rhombic shape in which the vertex points toward both sides of the conveyor.

The inclined grooves of the guide block are formed to be inclined outward while forming a round upward from the center, and the lower portion is formed to be inclined inward while forming a round downward.

In addition, the elevating member can be raised and lowered by a pneumatic cylinder provided vertically downward.

In addition, it is preferable that a plurality of balls are rotatably provided on a lower portion of the pressing member so as to be moved to both sides along the upper surface of the elevating member.

The fixing device may include a sensor for detecting the entry of the stencil, and the sensor may be provided inside the bracket of the fixing device to detect the entry of the stencil.

As described above, since the outer frame is not present, the volume is small and the winding is possible. Therefore, it is easy to handle and there is an advantage that the storage space can be easily secured.

In addition, since the stencil automatic supply system can be operated in the equipment due to the ease of handling, the replacement time of the stencil according to the shape of the substrate can be shortened.

In addition, there is an advantage in that the stencil cleaning process can be automatically performed in the equipment using the stencil automatic supply system, and the process can be shortened because a step of fixing the stencil to the frame is not necessary.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 4 is a perspective view showing a stencil feeder of a screen printer according to the present invention, FIG. 5 is an enlarged perspective view of a stencil according to FIG. 6B is an operational state diagram showing a state in which the stencil according to Fig. 5 is fixed by the fixing device. Fig.

As shown, the stencil supply device 100 of the screen printer of the present invention includes a conveyor 200, a stencil 300, and a fixing device 400.

A belt 210 is disposed on both sides of the conveyor 200, and a plurality of conveying pins 211 protrude upward from the belt 210 along a forward and backward movement path.

The transfer pins 211 are inserted into the both-side transfer holes 310 of the stencil 300 so that the stencil 300 can be supplied and discharged to the work area in a fixed state.

That is, since there is no frame on the outer edge of the stencil 300, when the stencil 300 is supported on both sides of the stencil 300, the stencil 300 can be supplied and discharged with a certain degree of flatness.

A plurality of fixing belts 212 are provided on the belt 210 of the conveyor 200 along the longitudinal direction to fix the lower portion of the conveyance pin 211 and support both ends of the stencil 300. [ May be provided.

The fixing member 212 preferably has a plate shape extending further to the inside of the conveyor 200 in order to support both sides of the stencil 300.

Alternatively, the conveyor 200 may use a chain (not shown) instead of the conveyor belt 210, and the stencil 300 may be one in which an outer frame is removed.

The stencil 300 is provided with a plurality of transfer holes 310 at corresponding intervals to the above-described transfer pins 211 so that the transfer pins 211 of the conveyor 200 can be inserted and discharged along the movement path. And a plurality of vertical holes 330 are formed along the movement path direction.

In addition, on the surface of the stencil 300, a vertically penetrating hole (not shown) is formed for passing the lead through the contact space of the substrate.

The pressing member 440 is moved upward and simultaneously moved to the stencil 300 in a state in which the fixing pin 442 of the pressing member 440 is inserted from below into the fixing hole 320, A tension can be given. Thus, the stencil 300 can form a flat surface.

It is preferable that the fixing hole 320 and the fixing pin insertion hole 411a of the bracket 410 to be described later are formed in a rhombic shape in which the vertex points toward both sides of the conveyor 200.

On the other hand, the stencil 300 can be supplied through the feeding direction of the conveyor 200 in a state of being wound around a ring bar (not shown). That is, since the stencil 300 has no outer frames, the stencil 300 can be easily wound on a ring (not shown) to reduce the volume. Accordingly, a large number of stencils 300 can be effectively installed in the screen printer equipment.

In addition, the stencil 300 may be fed to the conveyor 200 in a state in which the stencil 300 is pressed by the pressurizing rollers 500 corresponding to the upper and lower sides while the tension is maintained. That is, since the stencil 300 is made of a flexible material, if the flat surface of the stencil 300 is maintained by the pressure roller 500 during feeding, both sides of the stencil 300 can be supplied by the conveyor 200 while being maintained in a plate- .

The fixing device 400 includes an upper plate 411 and a lower plate 412 to which both ends of the stencil 300 are inserted and includes a plurality of fixed And a bracket 410 formed with a pin insertion hole 411a.

The lifting member 420 is positioned between the upper plate 411 and the lower plate 412 of the bracket 410 to be movable up and down. A guide block 430 having upward inclined grooves 431 formed on both sides thereof is provided.

A guide pin 441 is disposed between the guide blocks 430 and protrudes from the front and rear surfaces of the guide block 430 so as to be slid upward and downward along the slant groove 431, And a pressing member 440 inserted into the fixing pin insertion hole 411a through the fixing hole 320 of the stencil 300. [

Here, the inclined grooves 431 of the guide block 430 are formed to be inclined outward while forming a round upward from the center, and the lower portion is formed to be inclined inward while forming a round downward.

When the supplied stencil 300 stops at the work area of the conveyor 200, the fixing device 400 opens both ends of the stencil 300 to both sides by the upward movement, Thereby maintaining the tension. Accordingly, a tensile force is applied to the stencil 300 so that the stencil 300 can be flattened.

On the other hand, when discharging the stencil 300, the stencil 300 can be switched to a state capable of discharging the stencil 300 in the discharging direction by releasing the fixing by reverse operation.

The elevating member 420 may be moved up and down by a pneumatic cylinder 421 vertically disposed below and the lower portion of the pressing member 440 may be moved to both sides along the upper surface of the elevating member 420 It is preferable that a plurality of balls 443 are rotatably provided.

The fixing device 400 may include a sensor for detecting the entry of the stencil 300. The sensor may be provided inside the bracket 410 of the fixing device 400 to detect the stencil 300 ) Can be detected.

As a result, since the outer frame is not present, the volume is small and the winding is possible, so that it is easy to handle and it is easy to secure the storage space. In addition, since the automatic supply system of the stencil 300 can be operated in the equipment due to the ease of handling, the replacement time of the stencil 300 according to the shape of the substrate can be shortened.

In addition, there is an advantage that the cleaning process of the stencil 300 can be automatically performed in the equipment using the automatic supply system of the stencil 300, and the process of fixing the stencil 300 to the frame is not necessary, There are advantages.

While the present invention has been described in connection with the accompanying drawings, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

Accordingly, it is a matter of course that various modifications and variations of the present invention are possible without departing from the scope of the present invention. And are included in the technical scope of the present invention.

1 shows a conventional screen printer.

Fig. 2 is an enlarged view of a recess according to Fig. 1; Fig.

3 is a perspective view showing a conventional stencil.

4 is a perspective view showing a stencil feeder of a screen printer according to the present invention.

5 is an enlarged perspective view of the stencil according to FIG.

Fig. 6A is an operational state diagram showing a state in which the stencil according to Fig. 5 is placed in a work area in which a fixing device is installed. Fig.

Fig. 6B is an operational state diagram showing a state in which the stencil according to Fig. 5 is fixed by a fixing device. Fig.

Description of the Related Art

100: Feeder 200: Conveyor

210: Belt 211: Feed pin

212: fixing member 300: stencil

310: Feed hole 320: Fixed hole

400: Fixing device 410: Bracket

411: Upper plate 411a: Fixing pin insertion hole

412: Lower plate 420: Lift member

421: pneumatic cylinder 430: guide block

431: Inclined groove 440:

441: guide pin 442: fixing pin

443: ball 500: pressure roller

Claims (13)

A conveyor having a plurality of conveying pins along a forward and backward movement path of belts disposed on both sides thereof; A transfer hole and a fixing hole formed on both sides of the conveyor so as to insert the transfer pin of the conveyor, and a stencil having a charging port for applying a lead solution on the surface; And when the supplied stencil is detected to be located in the working area, the pressing member is engaged with the fixing hole to open both ends of the stencil on both sides and presses the upper and lower sides to maintain the tension, And a releasing device for releasing the releasing device to the discharging state, Wherein the pressing member lifts the stencil from the conveyor and lifts the stencil to the upper side of the conveyor when the both ends of the stencil are opened and the upper and lower portions are pressed. The method according to claim 1, Wherein a plurality of stencils are provided on the upper portion of the belt of the conveyor so as to fix a lower portion of the conveying pin and support both ends of the stencil. Claim 3 has been abandoned due to the setting registration fee. 3. The method according to claim 1 or 2, Wherein the belt of the conveyor uses a chain. The method according to claim 1, Wherein the outer frame is removed from the stencil. The method according to claim 1, Wherein the stencil is fed through the conveyor while being wound around the loop bar. The method according to claim 1, Wherein the stencil is supplied to the conveyor in a state in which the stencil is pressed by the press rollers corresponding to the upper and lower pressures while the tension is maintained. The method according to claim 1, The fixing device includes a bracket having an upper plate and a lower plate on which both ends of the stencil are inserted, and a plurality of fixing pin insertion holes corresponding to the fixing holes in a longitudinal direction of the upper plate; A lifting member that is vertically movable between an upper plate and a lower plate of the bracket; A guide block having a plurality of upwardly inclined grooves formed on the front and rear sides thereof along the movement path at an upper portion of the elevation member; And A guide pin positioned between the guide blocks and protruding from the front and rear surfaces is slid in an upper and lower diagonal angles along the inclined grooves and a fixing pin protruded upward is inserted into the fixing pin insertion hole through the fixing hole of the stencil Wherein the stencil supply device includes: a stencil supply unit for stencil printing; Claim 8 has been abandoned due to the setting registration fee. 8. The method of claim 7, Wherein the fixing hole and the fixing pin have a rhombic shape with a vertex point toward both sides of the conveyor. Claim 9 has been abandoned due to the setting registration fee. 8. The method of claim 7, Wherein the inclined grooves of the guide block are formed obliquely outward while forming a round from the center, and the lower portion is inclined inward while forming a round downward. Claim 10 has been abandoned due to the setting registration fee. 8. The method of claim 7, Wherein the elevating member is moved up and down by a pneumatic cylinder provided vertically downward. Claim 11 has been abandoned due to the set registration fee. 8. The method of claim 7, Wherein a plurality of balls are rotatably provided on a lower portion of the pressing member so as to be moved to both sides along an upper surface of the elevating member. Claim 12 is abandoned in setting registration fee. 8. The method of claim 7, Wherein the fixing device is provided with a sensor for detecting entry of the stencil. Claim 13 has been abandoned due to the set registration fee. 13. The method of claim 12, Wherein the sensor is provided inside the bracket of the fixing device to sense the entry of the stencil.

Images