KR20010097134A - Head for Surface Mounting Device - Google Patents

Abstract

The present invention relates to a mounter head, comprising: a vacuum generating unit for generating a vacuum, and a nozzle unit for attaching an electronic component to a desired position by moving the vacuum generated by the vacuum generating unit, wherein the vacuum generating unit And an ejector for generating a vacuum by passing a pneumatic pressure supplied from the first solenoid valve through a narrow tube and a first solenoid valve operating by externally supplied power to transfer the pneumatic pressure supplied from the line. A second solenoid valve which is operated by an externally supplied power to transfer the vacuum generated by the ejector, a pneumatic breakdown pressure delivered by the line, and a vacuum supplied through the second solenoid valve The size of the vacuum is measured by measuring the nozzle to be attached and the magnitude of the vacuum supplied to the nozzle. It is characterized by including a vacuum sensor to notify the outside.

According to the above configuration, the present invention reduces the volume of the mounter head by separating the vacuum generating unit and the nozzle unit, and separates the ejector and the nozzle when the vacuum breaking air pressure is transmitted using a 4-port solenoid valve for vacuum breaking to the ejector side. By preventing the outflow of pneumatic pressure, the vacuum generation time can be shortened.

Description

Mounter Head {Head for Surface Mounting Device}

The present invention relates to a mounter head, and more particularly, to a mounter head to separate the adsorption pad into two to reduce the volume of the adsorption pad.

In general, the mounter head refers to an apparatus for attaching an electronic component to a vacuum nozzle and inserting the electronic component into a printed circuit board.

The mounter head 10 includes a presser 11, a first solenoid valve 12, a second solenoid valve 13, an ejector 14, as shown in FIG. 1. And a filter 15, a nozzle 16, a third solenoid valve 17 and a switch 19. In the drawing, reference numeral 18 is a silencer for removing noise generated from the ejector 14, and 19 is a needle valve for externally controlling the strength of the pneumatic pressure supplied from the third solenoid valve 17 to the nozzle 16. Valve).

First, the presser 11 is configured to generate compressed air and supply the first to third solenoid valves 12, 13, and 17.

The first solenoid valve 12 is connected to the presser 11 in a pipeline to operate the second solenoid valve 13 by the pneumatic pressure supplied from the presser 11 by operating with the power applied from the system. An electromagnet is connected to the power supply. Here, the first solenoid valve 12 is a pilot system.

The second solenoid valve 13 moves the piston (not shown) up and down according to the pneumatic pressure supplied through the first solenoid valve 12 to transfer the pneumatic pressure supplied from the presser 11 to the ejector 14. A piston is connected to the output port of the first solenoid valve 12 and is installed between the presser 11 and the ejector 14.

The ejector 14 is connected to the input port of the second solenoid valve 13 so that a vacuum is generated in the lower center-centered pipeline while passing the pneumatic pressure transmitted from the second solenoid valve 13 through an inner narrow pipe.

In addition, the filter 15 is installed on the pipe connected from the ejector 14 to the nozzle 16 is configured to remove various foreign matter.

The nozzle 16 is connected through a conduit connected to the center of the lower end of the ejector 14 to attach the electronic component (not shown) to the vacuum supplied from the ejector 14.

In addition, the third solenoid valve 17 is operated by the power applied from the system, the first solenoid valve 12 is operated in the intersection, and the pneumatic pressure supplied from the presser 11 to the ejector 14 and the nozzle 16 An input port is connected to the presser 11 to supply vacuum to the connecting conduit, an output port is connected to a conduit connecting the ejector and the nozzle 16, and an electromagnet is connected to the power supply terminal of the system. . Here, the second solenoid valve 13 is a pilot system.

The switch 20 is operated under the control of the system and is electrically connected to the system to maintain the vacuum in the nozzle 16, and is installed on the connecting conduit between the ejector 14 and the nozzle 16.

Hereinafter, the operation of the conventional mounter head will be described in more detail with reference to FIG. 1.

First, when power is applied to the first solenoid valve 12 in the system while the presser 11 is operated, the piston of the first solenoid valve 12 is moved downward to the piston of the second solenoid valve 13. Pneumatic is delivered.

Then, the piston of the second solenoid valve 13 is moved downward by the pneumatic pressure transmitted from the first solenoid valve 12 so that the pneumatic pressure of the presser 11 is transmitted to the ejector 14.

When pneumatic pressure is transmitted to the ejector 14, the pneumatic pressure is transmitted to the silencer 18 while passing through a narrow pipe of the ejector 14. At this time, a vacuum is formed in the pipe connected to the center of the lower end of the ejector 14.

Then, the flat surface of the electronic component existing at its adjacent position is adsorbed to the nozzle 16 connected to the pipeline.

When the electronic component is adsorbed to the nozzle 16, the system operates the switch 20 to separate the ejector 14 and the nozzle 16 to maintain the vacuum in the nozzle 16 and at the same time the first solenoid valve 12. Cut off the power supply.

The system moves the mounter head 10 with the electronic component attached to the nozzle 16, and the mounter head 10 moves to the position where the electronic component is to be inserted. The system applies power to the third solenoid valve 17. Thus, the compressed air, that is, the vacuum breaking air pressure, is transferred to the pipe connecting the ejector 14 and the nozzle 16 through the third solenoid valve 17 to detach the electronic component.

When the electronic component is detached, the system shuts off the power applied to the third solenoid valve 17, returns the switch 20 again, moves the mounter head 10 to its original position, and then repeats the above operation.

However, such a conventional mounter head has a problem that the volume is increased by being formed as one assembly.

In addition, when the vacuum breaking air pressure is supplied to the nozzle, the vacuum breaking air pressure flows out to the ejector side, which causes another problem of delaying the time that the vacuum is generated by the air pressure when the vacuum is generated.

An object of the present invention to solve the above problems is to reduce the volume of the mounter head by separating the vacuum generating unit and the nozzle unit.

In addition, another object of the present invention is to reduce the vacuum generation time by separating the ejector and the nozzle to prevent the outflow of the vacuum breakdown pneumatic pressure to the ejector side when the vacuum breakdown pneumatic is delivered using a four-port solenoid valve.

1 is a pneumatic circuit diagram showing a typical mounter head,

2 is a pneumatic circuit diagram showing a mounter head according to the present invention;

3 is a cross-sectional view showing a coupling state of a nozzle, a solenoid valve and a vacuum sensor according to the present invention.

* Description of the symbols for the main parts of the drawings *

1: line 100: mounter head

110: vacuum generator 111: first solenoid valve

112: ejector 120: nozzle unit

121: second solenoid valve 122: nozzle

123: vacuum sensor 124: printed circuit board

In order to achieve the above object, the present invention is a mounter head including a vacuum generating unit for generating a vacuum, and a nozzle unit for attaching an electronic component to a desired position by moving the vacuum generated in the vacuum generating unit, The vacuum generating unit includes a first solenoid valve which is operated by an externally supplied power to transfer the pneumatic pressure supplied from the line, and an ejector which generates a vacuum by passing the pneumatic pressure supplied from the first solenoid valve through a narrow tube, The nozzle unit is operated by a power supplied from the outside to the vacuum generated through the ejector, the second solenoid valve for delivering the vacuum pressure for vacuum delivery delivered from the line, and the vacuum supplied through the second solenoid valve The nozzle to which the electronic component is attached and the magnitude of the vacuum supplied to the nozzle are measured. It provides a mounter head comprising a vacuum sensor for notifying the size of the ball to the outside.

Here, the second solenoid valve has four ports, and when the vacuum breakdown air is delivered from the line, the first port and the second port are connected to supply the vacuum breakdown air pressure to the nozzle. Four ports are connected to prevent the ejector's vacuum from being supplied to the nozzle.

(Example)

Hereinafter, the configuration and operation of the mounter head according to the present invention will be described in detail with reference to FIGS. 2 and 3.

Figure 2 is a pneumatic circuit diagram showing a mounter head according to the present invention, Figure 3 is a cross-sectional view showing a coupling state of a nozzle, a solenoid valve and a vacuum sensor according to the present invention.

As shown in FIG. 2, the mounter head 100 includes a vacuum generating unit 110 and a nozzle unit 120.

The vacuum generator 110 includes a first solenoid valve 111 and an ejector 112.

The first solenoid valve 111 is operated by the power supplied from a control unit (not shown) of the system to transfer the line 1 and the ejector 112 to the ejector 112 which delivers the pneumatic pressure supplied from the line 1. It is installed on the connecting pipe. The ejector 112 is configured to generate a vacuum while passing the pneumatic pressure transmitted from the first solenoid valve 111 through a narrow tube therein.

The nozzle unit 120 includes a second solenoid valve 121, a nozzle 122, and a vacuum sensor 123.

On the other hand, the second solenoid valve 121 is four ports consisting of A, B, P, and R, and the R port and the A port are connected to the output side of the ejector 112, and when the power is applied from the controller of the system, the piston moves. R port and B port are connected, A port and P port are connected to deliver the pneumatic breakdown pressure, the air pressure of the ejector 112 is passed to the B port to the vacuum ejector 112 to the ejector 112 side by the nozzle 122 It is configured to block the delivery of the pneumatic pressure. The nozzle 122 attaches an electronic component (not shown) to the vacuum supplied through the second solenoid valve 121, and is configured to detach the electronic component by the vacuum breaking air pressure transmitted from the second solenoid valve 121. do.

The vacuum sensor 123 measures the magnitude of the vacuum supplied to the nozzle 122 and informs the magnitude of the vacuum to the outside. As shown in FIG. 3, a passage through which the A port of the second solenoid valve 121 and the nozzle are connected is provided. It is fixedly installed by the printed circuit board 124 on.

Hereinafter, the operation of the mounter head according to the present invention will be described in more detail with reference to FIG. 2.

First, when the control unit of the system moves the piston of the first solenoid valve 111 to the left in the drawing, the pneumatic pressure passing through the line 1 is transmitted to the ejector 112 through the first solenoid valve 111.

The pneumatic pressure delivered to the ejector 112 passes through a narrow tube of the ejector 112 and flows out through a silencer (not shown). At this time, a vacuum is formed in the pipe connecting the ejector 112 and the nozzle 122. do.

This vacuum is transferred to the nozzle 122 through the R port and the A port of the second solenoid valve 121, and the nozzle 122 adsorbs the electronic component by the transferred vacuum. At this time, the vacuum sensor 123 senses the magnitude of the vacuum supplied to the nozzle 122.

In this case, when the nozzle 122 adsorbs the electronic component, the controller of the system moves the nozzle unit 120 to the insertion position of the electronic component, and then applies operating power to the second solenoid valve 121.

As the piston of the second solenoid valve 121 is moved to the left in the drawing, the R port and the B port are connected, and the A port and the P port are connected, so that the pneumatic pressure of the line 1, that is, the vacuum breaking air pressure, is connected to the nozzle 122. ), And the vacuum supplied from the ejector 112 is passed to the B port.

Thus, the electronic component adsorbed by the nozzle 122 is detached by pneumatic breakdown and inserted into the printed circuit board.

After that, the control unit of the system returns the nozzle unit 120 to the original position, completes one cycle, and repeats the above operation.

Therefore, since the vacuum generating unit and the nozzle unit are separated and only the nozzle unit is moved, the volume of the mounter head is made small, and the air generation time is shortened by blocking the transfer of air pressure to the ejector side.

As described above, the mounter head according to the present invention reduces the volume of the mounter head by separating the vacuum generator and the nozzle unit, and separates the ejector and the nozzle when the pneumatic pressure for vacuum destruction is transmitted using a 4-port solenoid valve. There is an advantage that the vacuum generation time can be shortened by preventing the pneumatic breakdown pressure from flowing out to the side.

Claims (2)

In the mounter head including a vacuum generating unit for generating a vacuum, and a nozzle unit for attaching an electronic component to the desired position by the vacuum generated by the vacuum generating unit, The vacuum generating unit, A first solenoid valve actuated by an externally supplied power to deliver pneumatics supplied from the line; It includes an ejector for generating a vacuum by passing the pneumatic pressure supplied from the first solenoid valve through a narrow tube, The nozzle unit, A second solenoid valve operated by an externally supplied power source to transfer the vacuum generated by the ejector and the vacuum breaking air pressure delivered from the line; A nozzle for attaching the electronic component to a vacuum supplied through the second solenoid valve; Mounter head comprising a vacuum sensor for measuring the magnitude of the vacuum supplied to the nozzle to inform the outside of the magnitude of the vacuum. According to claim 1, wherein the second solenoid valve is four ports, when the vacuum breakdown air pressure is transmitted in the line, the first port and the second port is connected to supply the vacuum breakdown air pressure to the nozzle, and at the same time And a third port and a fourth port are connected to prevent the vacuum of the ejector from being supplied to the nozzle.