JP2008118013A - Resin sealed device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin sealed device which is high in inspection accuracy even if the discrimination of the quality of a molding is carried out in the close vicinity of a press while reducing a rate of the generation of a defective article. <P>SOLUTION: An inspection section 12 performing the quality test of a molding 16 taken out of a press 3 by an unloader 6 by imaging the molding is provided in the vicinity of the press 3. When it is determined that the molding is defective, succeeding resin sealing operation at the press 3 is stopped. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention provides a resin seal in which a workpiece and a sealing resin are held by a loader from a workpiece supply unit and are carried into a press unit to be resin-sealed, and a molded product is held by the unloader from the press unit and carried out. It relates to a stopping device.

  The resin sealing device includes an extension rail unit having various functions in a separable manner between the workpiece supply unit and the workpiece storage unit. Each unit has a moving rail portion and a pedestal portion, and a press portion having a mold, a radiator plate supply portion, a film unit, and the like are appropriately installed on the pedestal portion. In particular, the press section can be increased or decreased as necessary.

A substrate such as a lead frame, a resin substrate, a resin tablet, a heat radiating plate, and the like are supplied from the work supply unit, and are respectively conveyed by a loader to each press unit provided in the extension rail unit. The resin-sealed work is taken out to the work storage unit by the unloader, the unnecessary resin is removed by the delegate part, and the molded product is stored in the molded product storage part.
A loader for carrying the work into the press section and an unloader for taking out the work after resin sealing from the press section move on a common moving rail. For example, when a resin sealing operation is performed by a plurality of press units, a workpiece supply operation by a loader and a molded product unloading operation by an unloader are continuously performed by alternating operations (see Patent Document 1).
JP 2001-300906 A

The inspection unit for determining the quality of the molded product is provided immediately before the molded product storage unit, and stores the non-defective product and the defective product separately. Further, when a defective product is detected, the subsequent resin sealing operation in the press section is stopped in order to prevent the generation of the defective product. For example, when mold resin remains in a resin flash or a mold cavity, it is necessary to stop the resin sealing operation of each press part as quickly as possible.
However, in a resin sealing device with a large number of press sections or a resin sealing device with a high machine cycle, when a defective product is detected, a new work loading operation or resin sealing operation by the loader to the press section Is likely to be continuously performed, and defective products are continuously generated.
In addition, when the inspection device is provided in the vicinity of the press unit, dust is picked up by dropping the resin piece (scrap) when taking out the molded product or cleaning the mold (upper die) with the cleaning brush provided in the unloader. There is a situation that it is difficult to provide because it is easily attached electrostatically.

  An object of the present invention is to provide a resin sealing device that has high inspection accuracy even when the quality determination of a molded product is performed in the immediate vicinity of a press portion, and has a reduced incidence of defective products.

In order to achieve the above object, the present invention comprises the following arrangement.
That is, a resin sealing device in which a workpiece and a sealing resin are held by a loader from a workpiece supply unit and are carried into a press unit and resin sealing is performed, and a molded product is held by an unloader from the press unit and carried out. An inspection unit is provided in the vicinity of the press unit for imaging a molded product taken out from the press unit by an unloader and performing a quality inspection. The resin sealing operation is stopped.
The inspection unit is provided below the workpiece transfer surface of the unloader, and includes an illumination unit that irradiates light toward the molded product and an imaging unit that reads reflected light from the workpiece, from the illumination unit toward the molded product. An image is picked up by an image pickup unit while the unloader is pitch-fed or continuously fed while irradiating light, and the quality is judged by image analysis.
Moreover, non-reflective glass is used for the cover upper surface part which covers a test | inspection part, The static elimination apparatus and the air blow apparatus are provided on this non-reflective glass, It is characterized by the above-mentioned.
In addition, a plurality of press units continuously perform a workpiece supply operation by a loader and a workpiece removal operation by an unloader.

If the above-described resin sealing device is used, an inspection unit that performs an image quality inspection by imaging a molded product taken out from the press unit by an unloader in the vicinity of the press unit is provided. The further resin sealing operation in the press part to be stopped was stopped. For this reason, the continuous resin sealing operation | movement in a single or several press part can be stopped quickly, and the incidence rate of inferior goods can be reduced.
The inspection unit is provided below the workpiece transfer surface of the unloader, and images are captured and imaged by the imaging unit while the molded product is pitch-fed or continuously fed by the unloader while irradiating light from the illumination unit toward the molded product. The pass / fail judgment is performed by the above. Therefore, all the workpieces immediately after the resin sealing can be inspected and the quality can be judged quickly.
In addition, non-reflective glass is used for the upper surface of the cover that covers the inspection part, and if a static eliminator and an air blower are provided on the non-reflective glass, the resin piece falls from the work that is held and taken out by the unloader. Even in such a case, the dust generated by the mold cleaning is prevented from being blown off by air or electrostatically attracted to the imaging surface, so that the accuracy of the inspection can be maintained.
In particular, in a resin sealing device in which a workpiece feeding operation by a loader and a workpiece unloading operation by an unloader are continuously performed in a plurality of press units, a pass / fail judgment can be made after the resin sealing operation of any press unit is completed. The continuous occurrence rate of defective products can be reduced as much as possible.

Hereinafter, preferred embodiments of a resin sealing device according to the present invention will be described in detail with reference to the accompanying drawings.
The resin sealing device includes an extension rail unit C having various functions between the workpiece supply unit A and the workpiece storage unit B so as to be separable. Each unit is provided with a moving rail portion 1 and a pedestal portion 2. The pedestal unit 2 is provided with various functional units.

  In the present embodiment, as the extension rail unit C, a press unit including the press unit 3 and a heat radiating plate supply unit 4 for supplying a heat radiating plate (heat spreader) are provided. These (especially press units) can be increased or decreased as necessary. Each press unit 3 includes a mold die, a known mold opening / closing mechanism for opening the mold die, and a known transfer mechanism for sending a sealing resin while applying resin pressure to the cavity of the mold die. Equipped.

  Further, the moving rail portions 1 between the units are connected to each other in a continuous manner, and a loader 5 for carrying the workpiece into the press portion 3 and an unloader 6 for taking out the workpiece after resin sealing from the press portion 3 are commonly moved. It moves on the rail part 1.

  In the workpiece supply unit A, a substrate (work) such as a lead frame or a resin substrate is supplied to the preheat table 7, and a resin tablet is supplied to the resin cassette 8 through the index table. In the heat sink supply unit 4, a heat sink (heat spreader) is supplied to the tray 9. The loader 5 receives the substrate from the preheat table 7, the resin tablet from the resin cassette 8, and the heat sink from the tray 9, moves along the moving rail unit 1, and carries it into the predetermined press unit 3 provided in the extension rail unit C. To do. Further, the resin-sealed workpiece is taken out to the workpiece storage unit B by the unloader 6, unnecessary resin is removed by the delegation unit 10, and the molded product is stored in the molded product storage unit 11. When the resin sealing operation is performed by the plurality of press portions 3 as in the present embodiment, the workpiece supply operation by the loader 5 and the molded product unloading operation by the unloader 6 are performed continuously and alternately.

  In FIG. 1, an inspection unit 12 is provided in the vicinity of the press unit 3 for imaging a molded product taken out from the press unit 3 by the unloader 6 and performing a quality inspection. The inspection unit 12 performs a quality inspection, and when it is determined as a defective product, the further resin sealing operation in the press unit 3 is stopped.

  2 and 3, the inspection unit 12 is provided in the vicinity of the press unit 3 and below the work conveyance surface P of the unloader 6. The inspection unit 12 includes an illumination unit 13 that emits light toward the molded product, and an imaging unit 14 that reads reflected light from the workpiece. The illuminating unit 13 pitches the unloader 6 while irradiating the molded product with light, and the imaging unit 14 captures an image and analyzes the image to determine pass / fail.

  In FIG. 3, a high-luminance array light source such as an LED is used for the illuminating unit 13, and light irradiated in the horizontal direction is irradiated directly upward via the half mirror 15. In FIG. 2 and FIG. 4, the imaging camera 14 a configuring the imaging unit 14 is provided at two locations corresponding to the passing position of the molded product 16.

  In FIG. 3, the inspection unit 12 is covered with a cover 17. A non-reflective glass 17 a is used on the upper surface of the cover 17. As a result, unnecessary light radiated from the illumination unit 13 is reduced, and the sharpness of the image captured by the imaging camera 14a is increased. In addition, unnecessary resin (scrap) is also attached to the molded product 16, and there is a possibility of dropping onto the lens portion of the imaging camera 14 a. Or there exists a possibility that the dust which generate | occur | produced by the metal mold | die cleaning by the cleaner provided in the unloader 6 may electrostatically adsorb | suck to the non-reflective glass 17a. For this reason, in FIG.2 and FIG.4, the static eliminating glass 18a and the air blower 19 are provided in the non-reflective glass 17a. The static eliminator 18 contacts the cover 17 to remove static electricity. In the air blowing device 19, a nozzle for blowing air is provided on the non-reflective glass 17a. Thereby, it is possible to prevent the resin pieces and dust from being electrostatically adsorbed to the non-reflective glass 17a, and to blow them off with air so that the upper surface of the cover can be kept clear.

5A to 5C, the workpiece unloading operation and the quality inspection by the unloader will be described.
In FIG. 5A, the cleaning brush is attached to the tip side of the unloader 6 with respect to the workpiece take-out chuck. When the unloader 6 grips the molded product 16 back from the mold, the unloader 6 returns to the standby position 20c while cleaning the mold. Between 20a and 20b is a mold cleaning area by an unloader.

  In FIG. 5B, when the molded product 16 reaches just above the imaging camera 14a (camera position), it stops once, and thereafter, the unloader 6 starts pitch feeding. That is, the operation of stopping after transporting to the camera position in accordance with the pitch of the molded product 16 is repeated for all. In FIG. 5C, when the last molded product 16 passes the camera position, the unloader 6 returns to the normal conveyance speed and conveys the workpiece.

  FIG. 6 shows an example of a work image captured by the imaging camera 14 a of the inspection unit 12. A lead frame 22 is used as a workpiece. In FIG. 6, when a black block is detected in the inspection region 21 corresponding to the molded product 16, a failure determination is made that a resin burr has occurred, and the resin sealing operation of the corresponding press unit 3 is quickly stopped. As a result, the incidence of defective products can be reduced.

  Although the said embodiment demonstrated the apparatus with which the press unit which has a press function is provided so that isolation | separation is possible, it is applicable also to the resin sealing apparatus which has a single or several press part in the normal apparatus main body. In this embodiment, the unloader 6 captures a still image by the inspection unit 12 by a pitch feed operation. However, the image is captured by the inspection unit 12 while continuously transporting the unloader 6 using a trigger device. You may make it take in.

It is a top view of a resin sealing device. It is explanatory drawing which shows the layout of a test | inspection part. It is explanatory drawing which shows the layout of a test | inspection part. It is a front view of an inspection part. It is explanatory drawing of the conveyance operation and inspection state of an unloader. It is explanatory drawing which shows an example of a workpiece | work image.

Explanation of symbols

A Work supply unit B Work storage unit C Extension rail unit 1 Moving rail part 2 Base part 3 Press part 4 Heat sink supply unit 5 Loader 6 Unloader 7 Preheating table 8 Resin cassette 9 Tray 10 Digate part 11 Molded product storage part 12 Inspection Section 13 Illumination section 14 Imaging section 14a Imaging camera 15 Half mirror 16 Molded product 17 Cover 17a Non-reflective glass 18 Static neutralizer 19 Air blow apparatus 20 Cleaning brush 21 Inspection area 22 Lead frame

Claims (4)

A resin sealing device in which a workpiece and a sealing resin are held by a loader from a workpiece supply unit, are carried into a press unit, and resin sealing is performed, and a molded product is held by an unloader from the press unit and carried out. And
An inspection unit is provided in the vicinity of the press unit for picking up an image of a molded product taken out from the press unit by an unloader and performing a pass / fail inspection. When the inspection unit determines that the product is defective, further resin sealing in the corresponding press unit Resin sealing device that stops operation.   The inspection unit is provided below the workpiece transfer surface of the unloader and includes an illumination unit that irradiates light toward the molded product and an imaging unit that reads reflected light from the workpiece, and irradiates light from the illumination unit toward the molded product. The resin sealing device according to claim 1, wherein the unloader is picked up by the image pickup unit while pitch-feeding or continuously feeding the unloader, and the quality determination is performed by image analysis.   The resin sealing device according to claim 1, wherein non-reflective glass is used for an upper surface portion of the cover that covers the inspection portion, and a static eliminator and an air blowing device are provided on the non-reflective glass.   The resin sealing device according to claim 1, wherein a workpiece supply operation by a loader and a workpiece take-out operation by an unloader are successively performed in a plurality of press sections.

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