KR20020022429A - Lead-frame feeder of auto molding device - Google Patents

Abstract

PURPOSE: A lead frame supplier of an apparatus for automatically molding a lead frame is provided to automatically supply the lead frame to the automatic molding apparatus, by placing the lead frame on a lead frame loading unit so that the lead frame is automatically exhausted by a pusher and is aligned in an alignment unit and by making a loader of a molding unit pick up the lead frame and supply the lead frame to a cavity of a lower molding die. CONSTITUTION: Multistage lead frames inserted in a cassette are loaded to a lead frame loading unit(100). A pusher 1(200) sequentially pushes the lead frame loaded in the cassette, positioned in the rear portion of the end of the lead frame loading unit. A pusher 2(300) secondly pushes out the lead frame exhausted from the cassette by the pusher 1. A pusher 3(400) ultimately pushes the lead frame pushed out by the pusher 2. The lead frame pushed out by the pusher 3 is settled in the alignment unit(500).

Description

Leadframe feeder for leadframe automatic molding machine {LEAD-FRAME FEEDER OF AUTO MOLDING DEVICE}

The present invention relates to a lead frame feeder of an automatic lead frame molding apparatus, which is capable of automatically supplying a lead frame laminated on a cassette after molding and wire bonding to a lower mold for molding in a molding die. will be.

In general, during the semiconductor manufacturing process, the thermosetting resin is molded on a lead frame after die bonding and wire bonding, followed by a lead frame molding process to protect chip circuits, followed by trimming and forming. The present invention relates to an apparatus for taking out a lead frame loaded on a cassette, and aligning and preheating the mold with a mold in a device for automatically molding a resin on a lead frame during the semiconductor manufacturing process. .

A conventional technique related to a lead frame supply device for supplying a lead frame after die bonding and wire bonding to a molding unit is disclosed in Korean Patent Publication No. 2000-9145, which is referred to as a lead frame supply and alignment unit. Its structure is that when the bonding magazine is moved up and down in accordance with the operation of the elevator to move the bonding magazine equipped with the lead frame in the wire bonded state to a predetermined position, the pusher is provided on one side The lead frame was pushed by the lead frame, and the lead frame that was pushed out was configured to be transported and aligned by the feed roller into the lead frame alignment unit.

On the other hand, in the above-described conventional leadframe feeder, the cassette from which the leadframe was discharged had to be manually removed, and the leadframe does not settle correctly in the alignment when the leadframe is supplied or when the leadframe is supplied. Excessive force is applied to the lead frame, causing the lead frame to break or a failure in the lead frame feeder, and when the size or type of lead frame to be molded is different, there is a problem that the entire feeder needs to be replaced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to load lead cassettes from the cassettes in order by stacking a plurality of cassettes which are loaded in a magazine state in which the lead frames have been completed in the wire bonding process. After the discharge of the lead frame is completed, the cassette is automatically removed and the next cassette is supplied to the discharge position so that the lead frame can be continuously supplied, and the lead frame discharged from the cassette is aligned according to the mold arrangement. It is possible to supply to the lower mold by the negative loader, and does not cause breakage of the lead frame or failure of the feeder from discharge of the lead frame to the alignment process, and it is aligned with the mold arrangement, that is, the lead frame is Preheating to a certain temperature to increase the molding efficiency To provide a de-feeder frame.

Another object of the present invention is to change the size and type of lead frame to be molded, the lead frame feeder that can be used interchangeably by adjusting the dimensions, such as replacement or position or width of some parts constituting the feeder without replacing the entire feeder To provide.

In order to achieve the above object, the present invention sequentially provides a lead frame mounting table on which a lead frame loaded in multiple stages on a cassette is loaded, and a lead frame placed on the rear end of the lead frame mounting table in the cassette. Pusher 1 which pushes out, Pusher 2 which is located in front of the front end of the said lead frame loading stand, and pushes the lead frame which was pushed out from a cassette by pusher 1 and the lead frame pushed out by this pusher 2 finally It provides a lead frame feeder comprising a pusher 3 and an alignment in which the lead frame completely pushed out by the pusher 3 is seated and aligned with the mold.

The lead frame loading table includes a horizontal moving means for horizontally moving a cassette loaded with a lead frame to a discharge position, a separation means for spaced apart a horizontally moved cassette, and a vertical movement for lifting one spaced cassette to a discharge position. Means and ejecting means for removing the empty cassette from which the leadframe is discharged.

The pusher 1 is configured to push the lead frame inserted into the cassette in the discharge position by the vertical movement means of the mounting table while the pushing pin is moved forward by the cylinder, the position adjustment before and after the lead frame It has a possible structure.

The pusher 2 is installed in front of the loading table and installed to pull out the lead frame pushed forward from the cassette by the pusher 1, which consists of a pinch roller type in a state where the lead frame is sandwiched between upper and lower rollers. When the roller rotates, the lead frame is pushed out.

The pusher 3 is installed to completely seat the lead frame pushed out by the pusher 2 to the seating portion of the alignment. The pusher 3 pushes the lead frame by a push lever pinned to a feed hole horizontally moved by a cylinder, and the alignment of the lead frame is seated. The transfer port is coupled to the piston rod of the cylinder by magnetic force. When the force applied to the lead frame is excessively greater than the magnetic force when the lead frame is transferred, the transfer hole is separated from the piston rod of the cylinder. It is to prevent the breakage of the lead frame and breakage of the feeder by stopping the transfer of the frame.

The alignment may include a rotating disc in which two seating parts on which the lead frame is seated are symmetrically in a rotational direction at a center thereof, a driving motor for rotating the rotating disc, a rotating shaft on which the rotating disc is detachably mounted, and the rotation. A heater plate installed in the lower part of the disc and contacting the rotating disc to preheat the lead frame seated on the rotating disc, and the heater plate being raised to contact the rotating disc or rotating the rotating disc when the lead frame is seated. It includes a lifting cylinder for lowering the heater plate.

Pusher 1 is to adjust its position, installed between pusher 2 and pusher 3

The lead frame conveying channel is made of a variable-adjustable structure so that it can be adjusted according to the size or type of the lead frame, and the rotating disc on which the lead frame is seated is provided with a plurality of different seating parts. Select and install the one suitable for the size or type of leadframe.

1 is a plan view showing the overall configuration of a lead frame feeder according to the present invention,

Figure 2 is a front view showing the overall configuration of the lead frame feeder according to the present invention,

Figure 3 is a side view showing a mounting table of the lead frame feeder according to the present invention,

4 is an enlarged plan view of the pusher 1 of the lead frame feeder according to the present invention;

5 is an enlarged front view of the pusher 1 of the lead frame feeder according to the present invention;

6 is an enlarged front view of the pushers 2 and 3 of the lead frame feeder according to the present invention;

7 is an enlarged side view of the pushers 2 and 3 of the lead frame feeder according to the present invention;

8 is a plan view of an alignment rotating disc of the lead frame feeder according to the present invention;

9 is an alignment sectional view of the lead frame feeder according to the present invention;

10 is an alignment side cross-sectional view of the leadframe feeder according to the present invention.

* Explanation of symbols for main parts of the drawings

1: lead frame feeder 100: loading table

110: horizontal moving means 120: vertical moving means

130: separation means 140: ejection means

200: pusher 1 210: cylinder

220: pushing pin 230: position adjusting handle

300: pusher 2 310: idle roller

320: driving roller 330: driving motor

400: pusher 3 410: cylinder

420: transfer port 430: push lever

440: tension spring 450: protrusion

460,462 Channel 464 Adjustment screw

500: alignment 510: rotating disc

520: drive motor 530: rotation axis

540: heater plate 550: lifting cylinder

560 sensor

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

As shown in FIG. 1 and FIG. 2, the lead frame feeder 1 of the present invention includes a lead frame mounting table 100 and a lead frame mounting table 100 in which lead frames stacked in multiple stages on a cassette are loaded. Pusher 1 (200), which is located at the rear of the front end and pushes the lead frame loaded in the cassette in order, pusher 2 (300) which pushes the lead frame out of the cassette by pusher 1 (200), and , Pusher 3 (400) for finally pushing the lead frame pushed out by the pusher 2 (300) and the lead frame pushed out completely by the pusher 3 (400) is composed of an alignment (500).

The mounting table 100 has a horizontal moving means 110 for horizontally moving the cassette loaded with the lead frame to the discharge position, a separation means 130 for separating the horizontally moved cassette, and one cassette spaced apart from each other. The vertical movement means 120 for elevating to the discharge position is provided, and the ejection means 140 for removing the empty cassette from which the lead frame is discharged is further provided.

The horizontal moving unit 110 is installed in the supply unit 102 under the mounting table 100 to transfer the cassette into which the lead frame mounted on the supply unit 102 is inserted to one side (right side in the drawing), The pushing plate 116 is attached to the pushing cylinder 114 which is horizontally moved on the guide bar 112 provided accordingly, and the cassette is conveyed by pneumatic pressure. Reference numeral 118 in the figure serves as a guide installed on the side of the supply unit 102 to guide the cassette to be neatly transported.

The vertical movement means 120 is a male screw shaft 122 installed vertically to be rotated by the driving of the lifting motor 121, screwed on the male screw shaft 122, the rotation is stopped by the guide bar 123 It consists of the lifting body 124, and the lift 125 of the "L" shape attached to one side of the lifting body 124.

The male screw shaft 122 is fixed so that the upper and lower ends thereof are rotatable by the bearings 126a and 126b, and pulleys 122a and 121a are respectively formed on the upper end of the male screw shaft 122 and the shaft of the lifting motor 121. Coupled, the power transmission means such as the belt 127 is connected between the two pulleys (122a, 121a) to be driven.

The spacer 130 slightly pushes the lift 125 attached to the lifting body 124 laterally to space the cassette seated on the lift 125 at a predetermined interval so that interference occurs during vertical movement of the cassette. In order to prevent the damage, it is provided with a pushing cylinder 132 positioned at the rear of the lift and fixed on the frame of the mounting table 100, a contact plate 134 contacting the pushing cylinder 132, and the contact plate ( The rear end is attached to 134 and the tip is composed of a guide bar 136 attached to the lift, and a guide bush 138 into which the guide bar 136 is fitted and slides and returns the guide bar 136 to its original position.

The ejector means 140 is installed in the discharge part 104 provided on the supply part 102 to discharge the empty cassette from which the lead frame is drawn out, which is an ejector 144 horizontally transported by the cylinder 142. )

The pusher 1 200 is a vertical movement means of the mounting table 100 while the pushing pin 220 is moved forward by the cylinder 210 is operated by pneumatic as shown in the enlarged view of Figures 4 and 5 It is configured so as to push out the lead frame inserted in the cassette at the discharge position by the 130.

In addition, the pusher 1 (200) is provided with a position adjusting handle 230 to be able to adjust the position before and after to meet the specifications of the lead frame.

The rear end of the pushing pin 220 is maintained to be pushed by the compression spring 222, the middle portion of the pushing pin 220 is installed so as to slide back and forth between the upper and lower rollers (224, 226), The rear end of the pushing pin 220 is provided with a sensor 228 for detecting that the pushing pin 220 is pushed backward when an excessive load is applied to the pushing pin 220 when the pushing pin 220 moves forward. When the pushing pin 220 is detected by the sensor 228, the compressed air supply to the cylinder 210 can be controlled to stop the abnormal pushing operation of the lead frame.

The pusher 2 (300) is installed in front of the mounting table 100 is installed to secondary pull the lead frame pushed forward from the cassette by the pusher 1 (200), which is shown in Figures 6 and 7 As described above, when the lower driving roller 320 rotates by the driving motor 330 while the lead frame is inserted between the upper idle roller 310 and the lower driving roller 320, the driving roller 320 and the idle roller are rotated. The lead frame sandwiched between the 310 is pushed out.

The pusher 3 400 is installed to completely seat the lead frame pushed out by the pusher 2 300 to the seating portions 512 and 514 of the alignment 500, which is a cylinder as shown in FIGS. 6 and 7. The transport port 420 horizontally transported by 410, the push lever 430 pin-bonded to the transport hole 420, and the transport hole 420 so that the push lever 430 is vertically erected. And a tension spring 440 installed between the push lever 430 and the projection 450 for maintaining the inclined state so as not to interfere with the movement of the lead frame in the initial (standby) position.

The pusher 3 400 is a lead when the lead frame is caught in the middle without being inserted into the seating portions 512 and 514 of the alignment 500 when the lead frame is finally seated on the seating portions 512 and 514 of the alignment 500. The magnet 414 is attached to the tip of the piston rod 412 of the cylinder 410 and the transfer hole 420 is provided with a magnetic body 422 to which the magnet 414 is attached so as not to apply excessive force to the frame. When excessive force is generated in the lead frame during the transfer of the frame, the magnet 414 attached to the tip of the piston rod 412 of the cylinder 410 is separated from the feed hole 420 and the piston rod 412 of the cylinder 410. Only contraction operation and the transfer port 420 to stop the movement.

In addition, one side 460 of the lead frame transfer channels 460 and 462 installed between the pusher 2 (300) and the pusher 3 (400) is fixed so that the other side 462 is movable horizontally. The screw 464 is installed to adjust the gap between the lead frame transfer channels 460 and 462 according to the size of the lead frame, that is, the width of the lead frame.

As shown in FIGS. 8 to 10, in the alignment 500 in which the lead frame which is pulled out from the cassette is seated by the coupling operation of the pushers 1, 2, 3 (200, 300, 400), two seating parts 512, 514 rotate in the center. A rotation disc 510 formed symmetrically in a direction, a drive motor 520 for rotating the rotation disc 510, a rotation shaft 530 on which the rotation disc 510 is detachably seated, and the rotation A heater plate 540 installed at a lower portion of the disc 510 and in contact with the rotation disc 510 to preheat the lead frame seated on the rotation disc 510, and the heater plate 540 is raised to raise the heater plate 540. It includes a lifting cylinder 550 for lowering the heater plate 540 for the rotation of the rotating disk 510 when contacting the rotating disk 510 or the seat of the lead frame, the rotation of the disk 510 Detect whether the lead frame is seated to control the rotation Sensor 560 is installed.

In the lead frame feeder of the present invention having the above configuration, a process of supplying and arranging lead frames to alignment will be described.

After the die bonding and wire bonding process is completed, the lead frame is loaded in the cassette in multiple stages, and the lead frame supply unit is loaded by loading a plurality of cassettes in which the lead frame is stacked in the stage 100 of the lead frame feeder 1. When operated, the horizontal moving means 110 is first operated so that the cassettes placed side by side on the mounting table 100 are pushed toward the discharge position at the same time, and the front cassette is lifted on the vertical moving means 120. In order to vertically move the cassette only, the pushing cylinder 132 of the separating means 130 installed behind the vertical moving means 120 is operated to space the next cassette. Slightly pushed toward the direction, only the front cassette is placed on the vertical moving means 120.

Next, when the vertical movement means 120 is driven, the front cassette loaded with the lead frame is raised to a height suitable for the ejection position, and the cassette is multistage from top to bottom or bottom to top as set in the program. As the height is changed, the lead frame inside the cassette is sequentially pushed out by the pusher 1 (200).

The lead frame is seated on the seating portions 512, 514 of the alignment 500 by the interlocking operation of the pushers 1, 2, 3 (200, 300, 400) used to move the lead frame inside the cassette to the alignment 500.

On the other hand, the empty cassette from which the lead frame is discharged is removed above the mounting table 100 by the ejection means 140, and the following cassette is repeatedly supplied to the supply standby state.

In addition, the rotation disc 510 of the alignment 500 senses the supply state of the lead frame by the sensor 560 and rotates by 180 ° to receive one lead frame from each of the seating portions 512 and 514 of both sides.

The rotation disc 510 of the alignment 500 maintains contact with the heater plate 540 positioned below the heat source 510 so that the lead frame seated thereon is preheated by preheating the lead frame. The heater plate 540 is moved downward by the operation of the elevating cylinder 550 only when the rotation is required for accommodating, so as to be spaced apart from the rotation disc 510 to allow the rotation operation.

When the lead frame is seated on the alignment 500, the loader of the molding unit waits for access while maintaining the preheated state.

As described above, in the present invention, when a lead frame loaded in a magazine state is placed on a lead frame mounting table, the lead frame is automatically discharged by the pusher and is seated and aligned on an alignment to maintain a preheated state. According to the present invention, the lead frame is automatically supplied to the lead frame molding apparatus, and according to the present invention, the position of the pusher 1 can be adjusted according to the size of the lead frame, and between the pushers 2 and the pusher 3 The distance between the channels installed in the can be adjusted, and can be used interchangeably simply by replacing the rotation disc of the alignment can supply a variety of lead frame by a single feeder, the present invention, the lead during the supply of the lead frame If there is a problem with the feeding of the frame, the feeding of the leadframe is automatically It consists of a structure in which it is possible to prevent the breakage of the breakage and the supply of the lead frame occurs, since the lead frame is fed to the mold by the loader, in the warm-up state on the alignment molding efficiency is also well have to improve the effect.

Claims (7)

In the lead frame feeder for supplying the lead frame after the die bonding and wire bonding process to the molding die for molding into a resin, A lead frame mounting table 100 in which lead frames inserted in a plurality of stages are stacked on a cassette, and a pusher 1 (200) positioned at the rear end of the lead frame mounting table 100 to sequentially push lead frames loaded on the cassette. ), Pusher 2 300 which pushes the lead frame out of the cassette by pusher 1 200 secondly, and pusher 3 which finally pushes the lead frame pushed out by pusher 2 300. And an alignment (500) on which the lead frame pushed out by the pusher 3 (400) is seated. The method according to claim 1, The loading table 100 is different from the horizontal moving means 110 for horizontally moving the plurality of cassettes loaded with the lead frame to the discharge position in the lower supply part 102 and the cassette at the front end of the plurality of cassettes horizontally moved. Spacing means 130 for separating the cassette, vertical movement means 120 for elevating the spaced end cassette to the discharge position, and empty cassette after the lead frame is discharged to the upper discharge portion 104 Lead frame feeder of the lead frame automatic molding apparatus, characterized in that the ejecting means for ejecting 140 is provided. The method according to claim 1, The pusher 1 (200) is installed at the rear of the mounting table 100 in the discharge position by the vertical movement means 130 of the mounting table 100 while the pushing pin 220 is moved forward by the cylinder 210 The lead frame feeder of the lead frame automatic molding apparatus is configured to push out the lead frame inserted in the cassette, and the position adjusting handle 230 is provided so as to adjust the position before and after the lead frame. . The method according to claim 1, The pusher 2 (300) is installed in front of the mounting table 100, the lower driving roller 320 is driven in the state in which the lead frame is sandwiched between the upper idle roller 310 and the lower driving roller 320. The lead frame feeder of the lead frame automatic molding apparatus, characterized in that configured to push out the lead frame sandwiched between the drive roller 320 and the idle roller 310 when rotated by the motor (330). The method according to claim 1, The pusher 3 (400) is a vertically conveying port (420) by the cylinder 410, the push lever 430 pin-coupled to the conveying port 420, and the push lever 430 vertically The tension spring 440 installed between the transfer hole 420 and the push lever 430 and the projection 450 for maintaining the inclined state so as not to interfere with the movement of the lead frame in the initial position to ensure And a magnet 414 is attached to the tip of the piston rod 412 of the cylinder 410, and a magnetic material 422 to which the magnet 414 is attached and detached is provided at the transfer hole 420 to transfer the lead frame. When excessive force is generated in the frame, the magnet 414 attached to the tip of the piston rod 412 of the cylinder 410 is separated from the feed hole 420 so that only the piston rod 412 of the cylinder 410 is contracted and transferred. Sphere 420 is a lead frame automatic mole characterized in that the movement is configured to stop Lead frame feeder for dings. The method according to claim 1, Lead frame transfer channels 460 and 462 are installed between the pusher 2 300 and the pusher 3 400, and one channel 460 is fixed and the other channel 462 is connected to the lead frame. Lead frame feeder of the lead frame automatic molding apparatus, characterized in that the adjustment screw 464 is provided to be movable horizontally to match the width. The method according to claim 1, The alignment 500 includes a rotating disc 510 having two seating parts 512 and 514 symmetrically in a rotational direction from a center thereof, a driving motor 520 for rotating the rotating disc 510, and the rotating disc. A rotary shaft 530 on which the 510 is detachably seated and a lead frame mounted on the rotary disk 510 in contact with the rotary disk 510 and installed in the lower portion of the rotary disk 510. Raising and lowering the heater plate 540 and the heater plate 540 to raise the heater plate 540 to contact the rotating disc 510 or to lower the heater plate 540 for rotation of the rotating disc 510 when the lead frame is seated. Lead frame feeder of the lead frame automatic molding apparatus comprising a cylinder (550), and a sensor (560) for detecting whether the lead frame is seated in order to control the rotation operation of the rotating disc (510).