JPH0677267A - Jet honing device - Google Patents

Abstract

PURPOSE:To enable a jet honing device to be lessened in production man-hours and production term and enhanced in productivity by a method wherein a jet honing device used for removing dam resin is combined with a water brush unit into a device of integral structure. CONSTITUTION:A jet honing device is equipped with a lead frame feed section 11 which feeds resin-sealed lead frames 2 one by one, a lead frame positioning- fixing section 8 which positions and fixes a lead frame 2, and a nozzle head 5 which jets water of high pressure against the lead frame 2 with a jet nozzle 4 to remove dam resin. A water brush unit section 19 is provided to spout out water of high pressure from a linear nozzle 15 fixed to a movable stage 17 against both the rear and front of the lead frame 2 where dam resin has been removed off to remove resin burrs and smuts from the lead frame 2. Furthermore, a lead frame housing section 12 where the lead frame 2 passing through the water brush unit section 19 is housed in a magazine 10 and a lead frame transfer section 9 are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jet honing device, and more particularly to a jet honing device for removing dam resin, resin flash, smut, etc. of a lead frame for a fine pitch LSI package after resin molding.

[0002]

2. Description of the Related Art Conventionally, this type of jet honing apparatus is used in two separate processes depending on the purpose of use. One is to remove the dam resin,
It is composed of the following five functional unit parts. This will be described with reference to the configuration perspective view of FIG. 3 and the lead frame plan view of FIG. 4. First, a pallet 3 for sandwiching and fixing the lead frame 2 having the dam resin 1 from both sides in the longitudinal direction, From the upper part of the lead frame 2 to the motor 16 by using the direct injection nozzle 4 with a high pressure liquid to dam the resin portion of the dam.
Secondly, the nozzle head portion 5 is aimed at while moving in the XY directions, and secondly, the lead frame 2 is formed by the high pressure liquid by digging according to the shape of the resin mold package 6 on the lead frame 2 fixed to the pallet 3. A lead frame positioning portion 8 having a lower receiving plate 7 for preventing deformation, thirdly, a lead frame transporting portion 9 for transporting the lead frame 2 along a transportation path, and fourthly, from a magazine 10. The lead frame supply unit 11 supplies the lead frames 2 one by one, and fifthly, the lead frame storage unit 12 stores the lead frame 2 from which the dam resin has been removed in the magazine 10.

Another purpose is to remove resin burrs on the surface of the lead frame and smut generated on the surface of the lead frame during the pretreatment of plating, and it is composed of the following two unit parts. This will be described with reference to the perspective view of FIG. 5. First, the lead frame 2 is transported by the rotation of the rotary roller 13, and the second transport portion 14 is used.
In addition, the high pressure water linearly jetted by the linear nozzle 15 provided in the middle of the transport unit 14 is being transported by the lead frame 2
And a water brush portion for removing resin flash and smut on the lead frame 2. Regarding supply and storage of the lead frame, a worker is usually arranged at the entrance and the exit of the transport unit 14.

[0004]

Conventionally, in this water brush process, the treatment is carried out by a dedicated water brush device different from the dam resin removal, and there is a drawback that the number of production steps becomes large. Further, the strength of the lead frame has been reduced due to the recent fine pitch of the lead frame, and the lead frame is often deformed by being caught by a rotating roller or the like of a carrying section when passing through the water brush process. Therefore, in order to prevent the deformation, the lead frames are placed one by one on the deformation preventing plate and the water brush process is performed. Therefore, in order to remove resin burrs and smut on both the front and back surfaces of the lead frame, it was necessary to replace the front and back surfaces of the lead frame and pass through the process twice. Therefore, it is difficult to pass the fine-pitch lead frame without deforming it by simply connecting the transport unit of the water brush device immediately after the lead frame transport unit of the conventional jet honing device for dam resin removal. It was

An object of the present invention is to combine a water brush unit with a jet honing device for dam resin removal to form an integrated device, thereby making it possible to shorten the number of production steps and the period, and improve the productivity. Is.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a high-pressure liquid is jetted from a direct nozzle to aim a dam resin of a lead frame and destroy or wash away the dam resin, and a lead frame for aiming. A lead frame positioning part for positioning and fixing the lead frame, and a lead frame carrying part for feeding the lead frame,
In a jet honing device having a lead frame supply unit for supplying resin-sealed lead frames one by one from a magazine and a lead frame storage unit for storing a lead frame from which dam resin has been removed, a resin flash on the entire lead frame In order to remove the smut, both ends of the lead frame are sandwiched and fixed from both sides. A step of removing the dam resin between the leads of the lead frame by arranging them in the lead frame conveying path between them and operating the above-mentioned respective parts in conjunction with each other on the basis of the periodical conveying index operation; The function to perform the process of removing Eteiru.

[0007]

The present invention will be described below with reference to the drawings. First, the water brush unit 19 used in one embodiment of the present invention will be described with reference to the perspective view of FIG. Both ends of the lead frame 2 are sandwiched and fixed by pallets 3 from the front and back sides. Furthermore, there is a linear nozzle moving stage 17 having a mechanism for moving the linear nozzle 15 back and forth with an air cylinder 18 at the lower part thereof, and by linearly ejecting a high-pressure liquid from the linear nozzle 15 and moving back and forth, The smut and resin flash on the back surface of the lead frame 2 are removed. The same mechanism as the lower mechanism is also installed in the upper part of the pallet 3 at symmetrical positions with the pallet 3 interposed therebetween, and simultaneously removes smut and resin flash on both the front and back surfaces of the lead frame 2.

When the lead frame 2 is fixed by such a mechanism to remove smut and resin flash, the lead frame thickness is 0.125 mm, the lead width is 0.3 mm, and the material C is
Using u lead frame, linear nozzle spray angle 4
0 °, distance from lead frame 55mm, pressure 100K
By spraying with water of g / cm ² , smut and resin flash can be removed without deformation of the lead frame.

Next, an embodiment of the jet honing device according to the present invention will be described with reference to the structural perspective view of FIG. The lead frames 2 are taken out one by one from the magazine 10 by the lead frame supply unit 11. The lead frame 2 taken out is conveyed to a position for aiming the dam resin with high-pressure water by the lead frame conveying section 9 moving in the apparatus. Lead frame 2 transported
Is fixed by sandwiching both side ends from both sides with a pallet 3, and the lower receiving plate 7 in which the lead frame positioning portion 8 is vertically moved is dug in accordance with the shape of the package 6 resin-molded on the lead frame 2. By doing so, it rises to the bottom surface of the lead frame 2 and receives the lead frame 2.

On the upper portion of the lead frame 2, a direct nozzle 4 for injecting high-pressure water, a nozzle head portion 5 for fixing the direct nozzle 4, and the nozzle head portion 5 in XY directions according to the shape of the package. Motor for moving 1
There is 6, and the dam resin is removed by moving while jetting high-pressure water and aiming at the dam resin. The lead frame from which the dam resin has been removed is again transported to the water brush unit 19 by the lead frame transport unit 9, and the smut and resin flash are removed as described above.
The lead frame 2 with the smut and resin burr removed is
Finally, the lead frame storage section 12 stores the sheets one by one in the magazine 10 to complete the work.

With such a mechanism, the smut and the resin flash can be automatically removed only by setting the magazine containing the lead frame, and the work man-hours conventionally performed by two persons can be completely eliminated. it can. Further, by adopting the same pallet method as the dam resin removing portion for fixing the lead frame at the water brush portion, it is not necessary to newly design.

[0012]

As described above, according to the present invention, the water brush unit for removing the smut and the resin burr is connected between the dam resin removing section and the lead frame housing section of the jet honing apparatus for aiming with the high pressure liquid. With this integrated structure, it is possible to process the work processes that were conventionally separated in one process, shortening the work man-hours and work period, and moving the nozzle unit with the water brush unit vertically sandwiching the lead frame. By doing so, there is an effect that a product with stable quality can be manufactured.

[Brief description of drawings]

FIG. 1 is a perspective view showing a unit configuration of an embodiment of the present invention.

FIG. 2 is a perspective view of a water brush unit that is a part of an embodiment of the present invention.

FIG. 3 is a perspective view showing a unit configuration of a conventional jet honing device.

FIG. 4 is a plan view of a resin-molded lead frame.

FIG. 5 is a perspective view of a conventional water brush device.

[Explanation of symbols]

 1 Dam Resin 2 Lead Frame 3 Pallet 4 Direct Nozzle 5 Nozzle Head 6 Resin Mold Package 7 Lower Support Plate 8 Lead Frame Positioning 9 Lead Frame Conveying 10 Magazine 11 Lead Frame Supply 12 Lead Frame Storage 13 Rotating Roller 14 Conveying Part 15 Linear nozzle 16 Motor 17 Linear nozzle moving stage 18 Air cylinder 19 Water brush unit

Claims (1)

[Claims] 1. A lead frame supply unit for supplying resin-sealed lead frames one by one from a magazine, a lead frame positioning fixing unit for positioning and fixing the supplied lead frames, and a fixed lead frame. High-pressure water is sprayed from a direct nozzle to aim and remove dam resin, and a high-pressure water is jetted from a linear nozzle mounted on a moving stage toward both the front and back sides of the lead frame from which dam resin has been removed. A water brush unit that removes resin burrs and smut on the frame, a lead frame housing that houses the lead frame that has passed through the water brush unit, and a lead frame carrier that connects the above-mentioned parts with a carrier path and carries the lead frame. And a jet honing device.