KR20110093617A - Screen printer - Google Patents

Abstract

PURPOSE: A screen printer is provided to improve the performance of equipment by reducing the temperature change of equipment inside. CONSTITUTION: A screen printer comprises a main body(200) and a conveying part(300). An installation position of a stencil mask(S) work area is formed inside the main body. The main body comprises a lead-in slot and draw-off slot. The stencil mask is led in the lead-in slot. The stencil mask is drawn from the work area to outside through the draw-off slot. The conveying part transfers the stencil mask, which is led in the installation position, to the draw-off slot, when the stencil mask is replaced. The conveying part transfers the stencil mask, led in the lead-in slot, to the installation position.

Description

Screen printer

The present invention relates to a screen printer, and more particularly to a screen printer that can easily replace the stencil mask without the need for the operator to manually open and close the cover by forming a slot (slot) for entering and withdrawing the stencil mask. will be.

In general, a screen printer is a device for applying a cream solder type lead liquid for installing components such as an integrated circuit (IC) and a resistor in a plurality of contact spaces formed on a surface of a printed circuit board.

Conventional screen printers, a conveyor (conveyer) which is provided in the working area of the main body to transfer the printed circuit board drawn from the outside in both directions, a work stage for positioning the stencil mask above the conveyor, and A squeegee that draws the lead liquid placed on the surface of the mask stencil into the contact space of the printed circuit board while moving in both directions from above the stencil mask located on the work stage, and moves the printed circuit board and the mask stencil It consists of a camera to check the position and a cleaning device for wiping the lead-through holes of the mask stencil.

In the conventional screen printer, the recognition side mark displayed on the printed circuit board and the recognition mark displayed on the stencil mask are moved by moving the printed circuit board (PCB) to the upper part of the work plate provided with the work conveyor at the central work position by the side side conveyor. The camera is recognized by the camera to accurately align the solder faces on the printed circuit board (PCB) and the countless lead passage holes drilled in the stencil mask.

Subsequently, the work conveyor is raised and the stencil mask and the squeeze are lowered to bring the stencil mask and the printed circuit board into close contact with each other. After moving the squeeze blade forward and backward, the lead placed on the stencil mask is pushed on the squeeze mask, and the lead liquid on the stencil mask is pushed. Pass through holes allow lead to be applied to the solder surface on the printed circuit board (PCB). Thereafter, lead-coated printed circuit boards are transferred from the central conveyor to the withdrawal side conveyor located opposite the intake side conveyor.

The screen printer described above requires a change of the production model during equipment operation. Changing the production model involves replacing the stencil mask for printing new substrates, repositioning the backup pins used to improve the print quality of the substrate, replacing the backup block, and replacing the stencil mask for printing. Such as sorting.

Among these, in order to replace the stencil mask, the operator opens the cover rotatably installed on the front of the screen printer, and then takes out the existing stencil mask to the outside and introduces a new stencil mask.

However, in the conventional screen printer, after the operator opens and opens the cover, a new stencil mask should be drawn in through the open area. Therefore, the manual operation of the operator increases during operation of the equipment, and thus, the stencil mask replacement is very difficult. There was a troublesome problem.

In addition, the screen printer has a characteristic that the temperature must be kept inside, but if the operator opens the cover of the screen printer to replace the stencil mask, the screen is affected by the temperature inside the screen printer and different external temperatures. The operation performance of the printer is reduced, thereby causing a problem in the work.

Accordingly, an object of the present invention is to solve the above problems, and forms a separate slot for drawing and withdrawing similar to the outer diameter of the stencil mask without a separate open cover, and is preset when the drawing of the stencil mask is detected. By counting the waiting time and inserting the stencil mask semi-automatically through the slot, it prevents the temperature inside the screen printer from being abnormally changed by the outside temperature, and maintains the normal operation performance of the screen printer. There is provided a screen printer that can reduce the number of manual operations for the operator to insert the stencil mask into the printer because no manual operation is required.

 According to the present invention for achieving the above object, a work area that is an installation position of the stencil mask is formed therein, an inlet side slot into which the stencil mask is drawn in, and a drawout side slot in which the stencil mask is drawn out from the work area to the outside. And a transfer unit for transferring the stencil mask, which is inserted into and positioned in the work area, to the withdrawal side slot and transferring the stencil mask that is withdrawn from the inlet slot, to the work area when the stencil mask is replaced. It is characterized by.

The inlet side slot and the outlet side slot, the blocking member is further provided, both sides of the blocking member is coupled to both ends of the inner shaft of the slot, it is preferable to be opened and closed by rotation about the axis.

Preferably, the shaft is provided with an elastic member to which a torsional elastic force is applied to return the blocking member to the position of closing the slot.

On the other hand, the pull-in slot and the pull-out slot, the inlet and the draw direction of the stencil mask can be changed with each other, the inlet and the drawer of the stencil mask can be made both in the inlet slot.

The transfer unit forms a transfer path between the inlet and the outlet slots, a pair of mask guides for slidingly supporting both ends of the stencil mask, and a power supplied from a driving unit, and the stencil mask above the mask guide. When the slide unit is installed to be reciprocally moved along the transfer path of the, and the rod is installed in the slide portion, and the rod coming out to the lower portion is caught on the front or rear end of the stencil mask, or when the rod is raised A transfer cylinder that is released from the stencil mask, and is electrically connected to the transfer cylinder and the slide unit, and receives the stencil mask replacement signal from the outside to drive the transfer cylinder, and the drive unit connected to the slide unit. It is preferable to have a control unit for driving the.

On the upper surface of the pair of mask guides, it is preferable that seating grooves having a “b” shape for supporting both ends of the stencil mask correspond to each other.

At the end of the rod, it is preferable to further include a packing for mitigating the impact at the locking position at the end of the stencil mask.

In the work area, a sensing sensor disposed adjacent to the slot on the inlet side to detect the inflow of the stencil mask and applying a detection signal to the control unit when detecting the inlet is further provided.

When the detection signal of the detection sensor is applied, the control unit preferably drives the transfer unit after a predetermined operation waiting time from the time when the detection signal is applied.

The inlet slot and the outlet slot, both of the stencil mask can be pulled in / out, and the transfer unit, the inlet slot or the outlet side slot can be drawn in the opposite direction stencil mask have.

The detection sensor may be provided at the work area position and the inlet and outlet positions with respect to the work area, respectively, and apply a detection signal detecting the stencil mask to the controller.

As described above, the present invention forms slots for stencil mask insertion and withdrawal so that the stencil mask can be easily replaced without opening the cover manually, thereby eliminating the need for the operator to manually open and close the cover. Therefore, there is an advantage that can improve the performance of the equipment by reducing the temperature change in the equipment according to the external temperature.

1 is a perspective view showing a screen printer according to the present invention.
2 is an enlarged perspective view illustrating a slot and a blocking member of the screen printer according to the present invention.
3 is an enlarged perspective view of the slide unit and the transfer cylinder of the screen printer according to the present invention.
Figures 4a to 4c is an operating state diagram of the screen printer according to the present invention.
5A is a plan view schematically illustrating a normal installation state of a stencil mask and a mode of retracting a mask for a screen printer according to the present invention.
5B is a plan view schematically illustrating a mode of drawing out a stencil mask in a normal installation state of a stencil mask for a screen printer according to the present invention.
5C is a plan view schematically illustrating a replacement mode of the stencil mask in the screen printer according to the present invention.

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

In describing the present invention, the defined terms are defined in consideration of the function of the present invention, and should not be understood in a limiting sense of the technical elements of the present invention.

1 is a perspective view showing a screen printer according to the present invention, Figure 2 is an enlarged perspective view showing a slot and a blocking member of the screen printer according to the present invention, Figure 3 is a slide portion and a transfer cylinder of the screen printer according to the present invention 4A to 4C are enlarged perspective views of the screen printer according to the present invention, and FIG. 5A is a schematic view showing a normal installation state of a stencil mask and a mode of retracting the mask for the screen printer according to the present invention. 5B is a plan view schematically illustrating a mode of drawing out a stencil mask in a normal installation state of a stencil mask for a screen printer according to the present invention, and FIG. 5C is a view illustrating a replacement mode of the stencil mask in the screen printer according to the present invention. A schematic top view.

As shown in FIGS. 1 to 5c, the screen printer 100 according to the present invention has a work area in which a normal installation position of the stencil mask S is formed, and an entrance side slot into which the stencil mask S is introduced. (Slot, 210 '), the main body 200 having a slot side (Slot, 210' ') that the stencil mask (S) is drawn out from the working area to the outside, and when the stencil mask (S) is replaced Transferring the stencil mask S, which is inserted into and positioned in the work area, to the withdrawal side slot 210 ″, and transferring the stencil mask S that is introduced from the withdrawal side slot 210 ′ to the work area. It includes a transfer unit 300.

Here, a conveyor (not shown) for transferring the printed circuit board in both directions and a work stage (not shown) for positioning the stencil mask S on the conveyor are located in the inner working area of the main body 200. Can be arranged.

In addition, a squeeze (not shown) for introducing lead liquid placed on the surface of the mask stencil (S) into each contact space of the printed circuit board (not shown) while moving in both directions from above the work stage. While the camera (not shown) to check the position of the printed circuit board and the stencil mask (S), and the cleaning device (not shown) for wiping the hole for the passage of the lead solution of the stencil mask (S). Can be.

The conveyor, the squeeze, the camera and the cleaning device are generally applied components, so detailed description thereof will be omitted.

The slots 210 ′ and 210 ″ are formed to introduce a stencil mask S into the working area of the main body 200 or to withdraw the stencil mask S when the stencil mask S is replaced. The shape of '') may be formed to be equal to or slightly larger than the widths of the top, bottom, left, and right sides of the stencil mask S so as not to receive nutrition from the external temperature.

On the other hand, the slots 210 'and 210' 'are opened when the stencil mask S is drawn in, and when the stencil mask S is drawn out, the slots 210' and 210 'are returned to their original positions. Blocking member 400 for closing ') may be further provided.

Both sides of the blocking member 400 may be coupled to both inner ends of the slots 2100 ′ and 210 ″ and the shaft 410, and may be opened and closed by rotation about the shaft 410.

In addition, both ends of the shaft 410 in the longitudinal direction may be provided with an elastic member 500 to which a torsional elastic force is applied to return the blocking member 400 to a position where the closing member 400 is closed. Here, one end of the elastic member 500 may be connected to the shaft 410, the other end may be connected to the inner end or the main body 200 of the slot (210 ', 210' ').

That is, when the blocking member 400 introduces the stencil mask S into the inlet slot 210 ′ formed in front of the main body 200, the blocking member 400 is connected to the inlet side end of the stencil mask S. It is pushed and rotated toward the main body.

Such a blocking member 400, the slot member 400 is automatically returned to its original position by the elastic force after the stencil mask (S) passes, without hindering the introduction of the stencil mask (S) slot (210 ', 210' ') can be closed.

On the other hand, the direction in which the blocking member 400 is opened is preferably open to the work area of the main body 200, but after the operator rotates the blocking member 400 to the front side of the main body 200, the inlet side opened The stencil mask S may be introduced through the slot 210 ′.

Thus, the blocking member 400 prevents foreign matter from flowing through the open slots 210 'and 210' 'and prevents the temperature of the work area from being affected by the external temperature. In addition, it is possible to eliminate the need to open and close the stencil mask (S) replacement cover as in the conventional screen printer.

The transfer unit 300 moves the stencil mask S to be withdrawn when the stencil mask S is replaced to the draw-out slot 210 ″ formed at the rear of the main body 200, or moves the new stencil mask S. It transfers to the work stage.

Here, the transfer unit 300 forms a transfer path between the inlet side slot 210 'and the outlet side slot 210' ', and a pair of mask guides for slidingly supporting both ends of the stencil mask S. 310 and a slide part 320 which is installed to be reciprocally moved along the transfer path of the stencil mask S above the mask guide 310 by receiving power from a driving part (not shown), and the slide part. Is installed in the 320, the position is caught in the front or rear end of the stencil mask (S) when the rod coming out of the lower, or when the rod 31 is raised is caught in the stencil mask (S) is released. It is electrically connected to the transfer cylinder 330, the transfer cylinder 330 and the slide 320, and receives the stencil mask (S) replacement signal from the outside to drive the transfer cylinder 330, the slide The drive connected to the unit 320 To a control unit (not shown) for driving (not shown) it is preferred.

Here, the upper surface of the pair of mask guide 310 is preferably formed so that the mounting grooves 311 of the "b" shape for supporting both ends of the stencil mask (S) to face each other.

In addition, the end of the rod 331 is preferably provided with a packing 331a made of a soft synthetic resin in order to alleviate the impact of the locking position at the end of the stencil mask (S). That is, as the end of the rod 331 provided with the packing 331a is positioned at the front end or the rear end of the stencil mask S, the stencil mask S is moved along the movement of the slide 320. It is moved.

On the other hand, the main body 200 is provided with a control unit (not shown) for driving the transfer unit 300, the work area of the main body 200 is disposed adjacent to the inlet side slot 210 'is a stencil mask (S) In addition to the detection of the input, it is preferable that a detection sensor 600 for applying a detection signal to the control unit when the input is detected.

Here, the detection sensor 600 is provided at the work area position and the inlet and outlet positions with respect to the work area position, respectively, and apply a detection signal detecting the stencil mask S at each position to the controller. It is desirable to. That is, three detection sensors 600 may be installed to detect the position of the stencil mask S in the work area, the inlet and the outlet positions. Of course, the number and position of the detection sensor 600 is not limited to the bar will be found that can be applied in various ways.

In addition, when a detection signal of the detection sensor 600 is applied, the controller may drive the components of the transfer unit 300 after a preset operation waiting time from the time when the detection signal is applied.

That is, the sensor 600 detects a state in which the operator inserts the stencil mask S into the slots 210 'and 210' 'at a predetermined length or completely, and the controller detects a preset operation waiting time. Counting.

When the count is completed, the transfer unit 300 is driven by the control unit to move the stencil mask S to be withdrawn to the withdrawal side slot 210 ″ and the stencil mask located at the withdrawal side slot 210 ′ ( S) is transferred to the work stage.

Hereinafter, an operation sequence of the screen printer 100 according to the present invention will be described with reference to FIGS. 4A to 4C.

 First, when the operator inserts the stencil mask S in a predetermined length or completely through the inlet slot 210 ', the blocking member 400 rotatably installed in the slots 210' and 210 '' is the stencil mask. It rotates to the working area side of the main body 200, pushing in the state which contact | connects the edge part of (S). At this time, the detection sensor 600 detects the input of the stencil mask S, and the control unit receiving the detection signal of the detection sensor 600 counts a preset operation waiting time.

When the count is completed, the slide 320 is located on the upper portion of the stencil mask (S) to be taken out while moving along the transfer path, the rod 331 of the transfer cylinder 330 installed in the slide 320 is withdrawn The lower position is in contact with the front or rear end of the stencil mask S.

Next, after the slide unit 320 moves along the transport path, the work stage to be withdrawn is moved to the withdrawal slot 210 ″, and then the rod 331 of the transport cylinder 330 is raised to its original position. Done.

Finally, the slide unit 320 moves to the withdrawal side slot 210 ″ and moves to the upper portion of the new stencil mask S, and then moves the new stencil mask S to the work stage in the same manner as described above. To complete the replacement of the stencil mask (S).

On the other hand, as shown in FIGS. 5A to 5C, on the other hand, in the above-described pull-in slot 210 ′ and the pull-out slot 210 ″, the pull-in and pull-out directions of the stencil mask S may be changed. In addition, it will be appreciated that both the inlet and the outlet of the stencil mask S may be achieved in the inlet slot 210 '.

In other words, the pull-in slot 210 'and the pull-out slot 210' 'may both pull in and pull out the stencil mask S, and the transfer unit may include the pull-in slot ( 210 ') or the stencil mask S drawn into the withdrawal side slot 210' 'may be withdrawn in the opposite direction.

That is, the sensing sensor 600 is provided at the work area position and the inlet and the outlet positions with respect to the work area, respectively, to apply the sensing signal of detecting the stencil mask S at the respective positions to the controller. do.

As shown, the sensor 600 1 recognizes the stencil mask (S) at the front and rear of the equipment, the sensor 600, 2 recognizes the stencil mask (S) of the normal installation state, the sensor 600 ) 3 recognizes the stencil mask (S) at the back and forth of the equipment.

In FIG. 5A, two modes of inserting the stencil mask S and the stencil mask S are shown. In the normal installation state (left side), the stencil mask is positioned at the position where printing is possible on the printed board. (S) is positioned, and in this state, the sensor 600 2 senses.

And, if there is no stencil mask (S) in the equipment, the stencil mask (S) is supplied from the outside, the two modes of mask loading the stencil mask (S) to the normal installation position is indicated in "Load".

In the first mode, the stencil mask S is positioned at the front of the device so that the sensor 600 1 is sensed as a method of pulling in the front of the device. In mode 2, the mask is placed in front of the equipment so that the sensor 3 is sensed.

In FIG. 5B, two modes of removing a mask and two modes of removing a mask for cleaning are shown. Each of two modes of extracting a stencil mask S in a normal installation state in "Remove" is shown. Shown.

Here, the third mode is to draw the stencil mask (S) to the front of the equipment, the fourth mode is to show the drawing of the stencil mask (S) to the rear of the equipment, the third and fourth modes are the stencil mask Withdraw (S) out of the equipment to show that the equipment operator (Operator) to remove the stencil mask (S) out of the equipment without opening the cover (cover).

In FIG. 5B, "Remove Cleaning" is a mode used when the operator wants to manually clean the stencil mask S, not to pull out the stencil mask S. FIG. In other words, it is to allow the equipment operator to open the cover (cover) and manually clean the stencil mask (S) by positioning the mask at the end of the equipment without pulling out of the equipment. In addition, mode 5 allows cleaning from the front of the equipment, and mode 6 allows cleaning from the back of the equipment.

Next, in FIG. 5C, two change modes for exchanging the stencil mask S are illustrated, and mode 7 is a mode for replacing the stencil mask S in front of the apparatus.

Here, the mode 7-1 is to draw the stencil mask (S) in the normal installation state to the rear of the equipment, the 7-2 mode is a method of moving the stencil mask (S) in the normal installation state to the front of the equipment. And mode 8 is to replace the stencil mask (S) in the rear of the equipment, mode 8-1 is to draw the stencil mask (S) in the normal installation state to the front of the equipment, mode 8-2 It is a method to move the stencil mask (S) to the normal installation state to the rear of the equipment.

Modes 7 and 8 described as described above may enable a temporary storage of the stencil mask S in the equipment. In addition, after drawing the stencil mask S in the third mode from the front of the equipment, a method of introducing the stencil mask S in the first mode may be used. In addition, after the withdrawal of the stencil mask S in the fourth mode from the rear side of the equipment, the method of introducing the stencil mask S in the second mode may be used.

As a result, the present invention by forming only the insertion and withdrawal slots (210 ', 210 ″) and the same as the outer diameter of the stencil mask (S) without a separate open cover, the equipment by the external temperature when replacing the stencil mask (S) The internal temperature of the system can be prevented from being affected, thereby improving the operating performance of the equipment.

In addition, by counting the time when the detection of the stencil mask (S) is pulled in and semi-automatically, the number of manual operations of the operator can be reduced, thereby reducing the time for replacing the stencil mask (S).

The technical idea of the screen printer 100 according to the present invention has been described above with reference to the accompanying drawings, but this is by way of example and not by way of limitation.

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.

100: screen printer 200: main body
210 ': Incoming side slot 210'': Outgoing side slot
300: transfer unit 310: mask guide
311: seating groove 320: the slide portion
330: transfer cylinder 331: rod
331a: packing 400: blocking member
410: shaft 500: elastic member
600: Sensor S: Stencil Mask

Claims (11)

A main body having a work area that is an installation position of a stencil mask therein, an inlet side slot into which the stencil mask is retracted, and a withdrawal side slot through which the stencil mask is withdrawn from the work area; And
And a transfer unit transferring the stencil mask, which is inserted into and positioned in the work area, to the withdrawal side slot and transferring the stencil mask that is withdrawn from the intake slot, to the work area when the stencil mask is replaced. Screen printer. The method of claim 1,
A blocking member is further provided in the inlet slot and the outlet slot, and both sides of the blocking member are axially fastened to both ends of the inner side of the slot and opened and closed by rotation about the axis. The method of claim 2,
And the shaft is provided with an elastic member to which a torsional elastic force is applied to return the blocking member to the position of closing the slot. The method of claim 2,
The inlet and outlet sides of the inlet slot and the outlet slot may be interchanged with each other.
The inlet side slot, the screen printer, characterized in that to achieve both the entry and withdrawal of the stencil mask. The method of claim 1,
The transfer unit may include a pair of mask guides forming a transfer path between the inlet and the outlet slots and slidingly supporting both ends of the stencil mask;
A slide unit which receives power from a driving unit and is installed to reciprocate along a transfer path of the stencil mask above the mask guide;
A transfer cylinder installed in the slide unit and positioned to be caught at the front or rear end of the stencil mask when the rod coming out from the lower portion is lowered, or released to the stencil mask when the rod is raised; And
And a controller electrically connected to the transfer cylinder and the slide unit to drive the transfer cylinder by receiving the stencil mask replacement signal from the outside, and to drive the drive unit connected to the slide unit. Screen printer. The method of claim 5,
The upper surface of the pair of mask guide, the screen printer, characterized in that the "b" shaped mounting grooves for supporting both ends of the stencil mask are formed to correspond to each other. The method of claim 5,
At the end of the rod, the screen printer, characterized in that the packing is further provided for mitigating the impact when the position is caught at the end of the stencil mask. The method of claim 5,
The work area, the screen printer, characterized in that disposed adjacent to the inlet side slot to detect the intake of the stencil mask, the sensing sensor for applying a detection signal to the control unit when the inlet detection. The method of claim 8,
The control unit, when the detection signal of the detection sensor is applied, the screen printer, characterized in that for driving the transfer unit after a predetermined operation waiting time from the time when the detection signal is applied. The method of claim 1,
The inlet side slot and the outlet side slot, both the in / out of the stencil mask is possible,
And the transfer unit draws out the stencil mask drawn into the inlet slot or the outlet slot in the opposite direction. The method of claim 8,
The detection sensor may be provided at the work area and the inlet and outlet positions with respect to the work area, respectively, and apply a detection signal for detecting the stencil mask to the controller. .

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