Film uncovering positioning device for lead frame

Abstract

The utility model discloses a film uncovering positioning device for a lead frame, which relates to the technical field of film uncovering for the lead frame, and comprises a film uncovering device main body, an operation table top, a positioning conveying belt and a lead frame material box, the operation table top is arranged on the film uncovering device main body, and the positioning conveying belt is slidably connected onto the operation table top through a positioner. The sliding end of the positioning conveying belt is connected with a lead frame material box, the lead frame material box can sequentially pass through the position under the first film uncovering mechanism, the detection mechanism and the second film uncovering mechanism, and one lead frame product is placed in the lead frame material box at a time. A lead frame material box is conveyed to the position below the first film uncovering mechanism and the second film uncovering mechanism through the positioner and the conveying belt to be subjected to multiple times of film uncovering operation, so that a lead frame product without successful film uncovering is ensured to be subjected to smooth film uncovering, and errors are effectively prevented.

Description

Technical Field

[0001] This utility model relates to the field of lead frame film removal technology, specifically a lead frame film removal and positioning device. Background Technology

[0002] As a chip carrier for integrated circuits, the lead frame is a key structural component that uses bonding materials (gold wire, aluminum wire, copper wire) to achieve electrical connection between the internal circuit leads of the chip and the external leads, forming an electrical circuit. It acts as a bridge connecting to external wires. Before leaving the factory, the lead frame must undergo film coating and film removal operations. However, traditional film removal devices are prone to failure because the ends of the film are not successfully lifted.

[0003] Currently, lead frame unwrapping devices only perform a single unwrapping operation, without testing or a second unwrapping process for unsuccessfully unwrapped products, leading to customer complaints. For example, the QFN frame fully automatic unwrapping machine disclosed in CN115332115A includes: a chassis, a film-tearing and conveying mechanism, a film-tearing clamping mechanism, a frame fixing platform, a film-tearing and dicing mechanism, and a pressing roller mechanism. The chassis forms the supporting base of the fully automatic unwrapping machine; the film-tearing and conveying mechanism is mounted on the chassis to enable the film-tearing clamping mechanism to move in the XY plane; the film-tearing clamping mechanism is mounted on the film-tearing and conveying mechanism to enable the unwrapping of the lead frame. The adhesive film is peeled off; a frame fixing platform is installed in the housing to support the lead frame; a film peeling and dicing mechanism is installed on the housing and can be inserted between the adhesive film with the separation edge and the lead frame, separating the adhesive film and the lead frame by slitting along the Y direction; and a pressure roller mechanism is installed on the housing at the same end of the film peeling and dicing mechanism to press the lead frame when the adhesive film on the lead frame is lifted, preventing the lead frame from being lifted off the frame fixing platform. In this solution, the film peeling operation is prone to failure to peel off the film, which may go undetected and result in unpeeled film, affecting customer complaints.

[0004] Therefore, in order to address the above problems, the applicant needs to design a lead frame film-removing positioning device to solve the problem. Utility Model Content

[0005] The purpose of this invention is to provide a film-removing and positioning device for lead frame, so as to solve the problem of film-removing devices that are prone to failure in the above-mentioned background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a film-removing and positioning device for lead frames, comprising a film-removing device body, an operating table, a positioning conveyor belt, and a lead frame material box. The film-removing device body is provided with an operating table, and a positioning conveyor belt is slidably connected to the operating table via a locator. The sliding end of the positioning conveyor belt is connected to the lead frame material box, which can sequentially pass under the first film-removing mechanism, the detection mechanism, and the second film-removing mechanism. One lead frame product is placed in the lead frame material box at a time.

[0007] Furthermore, a cylinder is installed on the first film-removing mechanism, and a sliding groove is opened in the first film-removing mechanism. A slider is slidably connected in the sliding groove. The slider is driven by the cylinder, and a push rod is connected to the slider. The surface of the push rod is in close contact with the surface of the first film-removing rod, and a spring is provided at the bottom of the first film-removing rod.

[0008] Furthermore, a motor is installed on the back of the second film-removing mechanism, a rotating disk is connected to the motor, and an arc-shaped guide plate is fixedly connected to the rotating disk.

[0009] Furthermore, one end of the inner side of the guide plate is connected to a guide roller via a spring and a connecting rod, and the other end of the inner side of the guide plate is connected to a second film-removing rod, on which a scraper is fixedly connected.

[0010] Furthermore, a take-up film roller is fixedly connected to the center of the rotating disk, and the take-up film roller can contact the surface of the guide roller.

[0011] Furthermore, the surface of the second film-removing rod is uniformly provided with rubber protrusions, and the length of the second film-removing rod matches the length of the guide plate.

[0012] Furthermore, an antistatic roller is fixedly installed on the second film-unwrapping mechanism, and the antistatic roller never comes into contact with the rotating guide plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. By using a positioner and a conveyor belt to transport the lead frame material box to the first and second film peeling mechanisms for multiple film peeling operations, the lead frame products that have not been successfully peeled are guaranteed to be successfully peeled, effectively preventing errors.

[0015] 2. The cylinder in the first film-removing mechanism presses the push rod and the first film-removing rod downwards onto the film on the product surface. The film is then torn off by the rolling of the first film-removing rod and wrapped around the push rod, completing the first film-removing operation. The entire process is intelligent and requires no manual intervention.

[0016] 3. Products that have not been successfully peeled are inspected by the inspection mechanism before the second peeling mechanism. The products that have not been successfully peeled are then transported to the second peeling mechanism for secondary peeling. The scraper and the rubber protrusions on the peeling rod ensure that the end of the film is lifted. The rotating guide plate can smoothly peel off the film and smoothly transport it from the guide roller to the take-up roller, thus realizing secondary peeling and ensuring the success rate of peeling. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the lead frame box of this utility model in its moving state;

[0019] Figure 3 This is a three-dimensional structural diagram of the testing mechanism of this utility model;

[0020] Figure 4 This is a schematic diagram of the connection structure of the second film-removing mechanism of this utility model;

[0021] Figure 5 This is a three-dimensional structural diagram of the guide plate of this utility model.

[0022] In the diagram: 1. Main body of the film peeling device; 2. Operating table; 3. Positioning conveyor belt; 4. Lead wire frame material box; 5. First film peeling mechanism; 501. Cylinder; 502. Slide groove; 503. Slider; 504. Push rod; 505. First film peeling rod; 6. Second film peeling mechanism; 601. Motor; 602. Rotary disk; 603. Guide plate; 604. Guide roller; 605. Second film peeling rod; 606. Scraper; 607. Rewinding film roller; 608. Antistatic roller; 7. Detection mechanism. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1-5As shown, the present invention discloses a film-removing and positioning device for lead frame, comprising a film-removing device body 1, an operating table 2, a positioning conveyor belt 3, and a lead frame material box 4. The operating table 2 is provided on the film-removing device body 1, and the positioning conveyor belt 3 is slidably connected to the operating table 2 via a locator. The sliding end of the positioning conveyor belt 3 is connected to the lead frame material box 4. The lead frame material box 4 can pass directly below the first film-removing mechanism 5, the detection mechanism 7, and the second film-removing mechanism 6 in sequence. One lead frame product is placed in the lead frame material box 4 at a time.

[0025] The entire film-removing device 1 uses a lead frame material box 4 to place the lead frame products that need to be peeled. The positioning conveyor belt 3 is used to drive the products to the designated area for film removal. The first film-removing mechanism 5 and the second film-removing mechanism 6 are used to perform film removal detection on the products before the film removal operation.

[0026] A cylinder 501 is installed on the first film-removing mechanism 5. A slide groove 502 is opened in the first film-removing mechanism 5. A slider 503 is slidably connected in the slide groove 502. The slider 503 is driven by the cylinder 501. A push rod 504 is connected to the slider 503. The surface of the push rod 504 is in close contact with the surface of the first film-removing rod 505. A spring is provided at the bottom of the first film-removing rod 505.

[0027] The first film-removing mechanism 5 can perform the first film removal on the lead frame product. The cylinder 501 uses the film-removing rod 505 to elastically squeeze into contact with the film of the product. The film is torn off by the rolling process of the film-removing rod 505 and collected by the push rod 504.

[0028] The second film-unwrapping mechanism 6 has a motor 601 mounted on its back. A rotating disk 602 is connected to the motor 601. An arc-shaped guide plate 603 is fixedly connected to the rotating disk 602. One end of the inner side of the guide plate 603 is connected to a guide roller 604 via a spring and a connecting rod. The other end of the inner side of the guide plate 603 is connected to a second film-unwrapping rod 605. A scraper 606 is fixedly connected to the second film-unwrapping rod 605. A take-up film roller 607 is fixedly connected to the center of the rotating disk 602. The take-up film roller 607 can contact the surface of the guide roller 604. Rubber protrusions are evenly distributed on the surface of the second film-unwrapping rod 605. The length of the second film-unwrapping rod 605 matches the length of the guide plate 603. An anti-static roller 608 is also fixedly installed on the second film-unwrapping mechanism 6. The anti-static roller 608 never contacts the rotating guide plate 603.

[0029] The second film-peeling mechanism 6 can perform repeated film-peeling processing on the lead frame material box 4 that has not been successfully peeled. It uses the rotating disc 602 and the scraper 606 at the bottom of the guide plate 603 to make priority contact with the film, and lift the end of the film. The film is then peeled off by multiple rubber protrusions on the second film-peeling rod 605. While being peeled off, the film is conveyed along the guide plate 603 to the guide roller 604, and finally wrapped around the winding film roller 607 during the final conveying.

[0030] Working principle: The lead frame that needs to be peeled is placed in the lead frame material box 4. The positioning conveyor belt 3 is used to transport it to the position of the first peeling mechanism 5. The cylinder 501 pushes the push rod 504 to press the peeling rod 505 into contact with the film on the surface. The film is torn off by the rotation of the peeling rod 505 itself.

[0031] Then it is transported to the testing mechanism 7 to check whether the film was successfully peeled off. (If the film was successfully peeled off, the lead frame material box 4 is continued to be transported to the end of the operating table 2.) If the film was not successfully peeled off, it is transported to the bottom of the second film peeling mechanism 6.

[0032] The ends of the film are lifted by scraper 606 and film-peeling rod 605. The film is torn off by rotating guide plate 603. The torn film will stick tightly to the surface of guide plate 603. The ends are conveyed by guide roller 604 to take-up film roller 607 and wound up. (Under the action of antistatic roller 608, the film will not stick tightly to guide plate 603 all the time, but only the ends).

[0033] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A film-removing and positioning device for lead frame, comprising a film-removing device body (1), an operating table (2), a positioning conveyor belt (3), and a lead frame material box (4). The operating table (2) is provided on the film-removing device body (1). The positioning conveyor belt (3) is slidably connected to the operating table (2) via a locator. The sliding end of the positioning conveyor belt (3) is connected to the lead frame material box (4). The lead frame material box (4) can pass under the first film-removing mechanism (5), the detection mechanism (7), and the second film-removing mechanism (6) in sequence. One lead frame product is placed in the lead frame material box (4) at a time.

2. The lead frame film-removing and positioning device according to claim 1, characterized in that: A cylinder (501) is installed on the first film-removing mechanism (5). A slide groove (502) is provided in the first film-removing mechanism (5). A slider (503) is slidably connected in the slide groove (502). The slider (503) is driven by the cylinder (501). A push rod (504) is connected to the slider (503). The surface of the push rod (504) is in close contact with the surface of the first film-removing rod (505). A spring is provided at the bottom of the first film-removing rod (505).

3. The lead frame film-removing and positioning device according to claim 1, characterized in that: The second film-removing mechanism (6) has a motor (601) installed on its back. A rotating disk (602) is connected to the motor (601), and an arc-shaped guide plate (603) is fixedly connected to the rotating disk (602).

4. The lead frame film-removing and positioning device according to claim 3, characterized in that: One end of the inner side of the guide plate (603) is connected to a guide roller (604) via a spring and a connecting rod, and the other end of the inner side of the guide plate (603) is connected to a second film-removing rod (605), on which a scraper (606) is fixedly connected.

5. The lead frame film-removing and positioning device according to claim 3, characterized in that: The center of the rotating disk (602) is fixedly connected to a take-up film roller (607), which can contact the surface of the guide roller (604).

6. The lead frame film-removing and positioning device according to claim 4, characterized in that: The surface of the second film-removing rod (605) is uniformly provided with rubber protrusions, and the length of the second film-removing rod (605) matches the length of the guide plate (603).

7. The lead frame film-removing and positioning device according to claim 3, characterized in that: An antistatic roller (608) is also fixedly installed on the second film-removing mechanism (6). The antistatic roller (608) and the rotating guide plate (603) never come into contact.

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