Film sticking roller device

Abstract

This utility model discloses a film-applying roller device, including a mounting base plate, a film-feeding roller assembly and a waste film collection assembly disposed on both sides of the upper part of the mounting base plate; a lower cutter assembly, an upper cutter assembly, and a roller assembly are respectively disposed on the lower part of the mounting base plate; a movable module is located below the mounting base plate, and a movable platform for placing a lead frame is disposed on the movable module; the lower cutter assembly includes a retractable lower cutter; the upper cutter assembly includes a liftable film paper suction head and a liftable upper cutter; the upper and lower cutters cooperate to cut the film paper; the roller assembly includes a liftable pressure roller. This utility model continuously supplies film through a film feeding and receiving mechanism, uses the movable platform to cover the entire lead frame with film paper, uses the pressure roller to press down multiple layers of film paper to ensure adhesion, and uses the upper and lower cutters to cut the film paper. This utility model can quickly apply film to the lead frame while ensuring accuracy and quality.

Description

Technical Field

[0001] This utility model belongs to the field of semiconductor packaging and testing technology, and in particular relates to a film-applying roller device for applying film to lead frames. Background Technology

[0002] To prevent resin from squeezing out and leaking through the gaps in the lead frame during the molding process, which could lead to defective products, a film-coating process is required on the back of the lead frame. Currently, lead frame film coating is still done manually, which cannot guarantee coating accuracy and quality, and the coating process is also quite time-consuming. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of manual film application by providing a film application roller device that can achieve rapid film application while ensuring accuracy and quality.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: A film-applying roller device, characterized in that: it includes a mounting base plate, a film-feeding roller assembly and a waste film collection assembly disposed on both sides of the upper part of the mounting base plate; a lower cutter assembly, an upper cutter assembly and a roller assembly are respectively disposed on the lower part of the mounting base plate; a movable module is provided below the mounting base plate, and a movable platform for placing a lead frame is disposed on the movable module; The lower cutter assembly includes a retractable lower cutter; the upper cutter assembly includes a liftable film paper suction head and a liftable upper cutter; the upper cutter and the lower cutter cooperate to cut the film paper; the roller assembly includes a liftable pressure roller; After the film is fed by the film feeding roller assembly, it separates from the base film and is pulled to the film feeding suction head; the separated base film is then wound up by the waste film collection assembly. The moving platform picks up the lead frame and moves it below the film feeding suction head. The suction head presses down to adhere the film to the head of the lead frame, and the lead frame moves to below the pressure roller. The moving platform moves forward, and after the entire frame is covered, the lower and upper cutters work together to cut the film, completing the film application.

[0005] Its further features are as follows: the lower cutter is fixed on the forward extension cylinder, and the forward extension cylinder is fixed on the first base; the upper cutter is fixed on the cutter pressing cylinder, the film paper suction head is fixed on the suction head pressing cylinder, and the cutter pressing cylinder and the suction head pressing cylinder are fixed on the second base.

[0006] A further feature is that the roller assembly includes a servo motor fixed on the base plate of the roller assembly, the servo motor is connected to a lead screw via a coupling, the lead screw and a linear bearing are fixed on the lifting block, the pressure roller lifting cylinder is fixed on the lifting block, the pressure roller is fixed on the pressure roller floating part, and the pressure roller floating part is fixed on the pressure roller lifting cylinder.

[0007] Furthermore, a position sensor is also provided on the base plate of the roller assembly to detect the descent position of the pressure roller.

[0008] Preferably, the film-dispensing wheel assembly includes a first main synchronous pulley mounted on a first rotating motor, which drives a first driven synchronous pulley to rotate via a first synchronous belt. The first driven synchronous pulley is mounted at the tail end of a first rotating shaft, and the film-dispensing disc is mounted at the head end of the first rotating shaft. The waste film collection assembly includes a second main synchronous pulley mounted on a second rotating motor, which drives a second driven synchronous pulley to rotate via a second synchronous belt. The second driven synchronous pulley is mounted at the tail end of a second rotating shaft, and the waste film collection disc is mounted at the head end of the second rotating shaft.

[0009] Preferably, the film feeding wheel assembly and the waste film collection assembly are equipped with a film pulling counterweight shaft, a film fixing cylinder, a waste film detection shaft, a film guide wheel, and a waste film tearing shaft on the film winding path. During film feeding, the film feeding disc rotates, and the film pulling counterweight shaft pulls out the film by its own weight. When the film needs to be cut, the film fixing cylinder presses down to ensure the film does not fall off. When waste film collection begins after film application, the waste film tearing shaft moves upward via a motor, separating the waste film from the film paper. When the waste film detection shaft detects the waste film in place, the waste film tearing shaft stops rising, and the waste film collection disc rotates to collect the excess waste film.

[0010] This invention utilizes a film feeding and receiving mechanism for continuous film supply, a moving platform to ensure the film covers the entire lead frame, pressure rollers to press down multiple layers of film to guarantee adhesion, and upper and lower cutters to cut the film. This invention enables rapid film application to the lead frame while maintaining precision and quality. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall mechanism of the film-applying roller device.

[0012] Figure 2 This is a schematic diagram of the roller and cutter assembly.

[0013] Figure 3 This is a schematic diagram of the lower cutter assembly mechanism.

[0014] Figure 4 This is a schematic diagram of the upper cutting blade assembly mechanism.

[0015] Figure 5 This is a schematic diagram of the roller assembly mechanism.

[0016] Figure 6 This is a schematic diagram of the film-dispensing turntable structure.

[0017] Figure 7 This is a schematic diagram of the waste film collection turntable mechanism.

[0018] Figure 8 This is a schematic diagram of the film paper winding process. Detailed Implementation

[0019] like Figure 1 , 2 As shown, a film-applying roller device includes a mounting base plate 600, film-feeding roller assemblies 400 and waste film collection assemblies 500 disposed on both sides of the upper part of the mounting base plate 600. A lower cutter assembly 100, an upper cutter assembly 200, and roller assemblies 300 are respectively disposed on the lower part of the mounting base plate 600. A movable module 42 is located below the mounting base plate 600, and a movable platform 41 for placing a lead frame is disposed on the movable module 42.

[0020] like Figure 3 As shown, the lower cutter assembly 100 includes a retractable lower cutter 103. The lower cutter 103 is fixed to the extension cylinder 102, which is fixed to the first base 101.

[0021] like Figure 4 As shown, the upper cutter assembly 200 includes a liftable film paper suction head 203 and a liftable upper cutter 205. The upper cutter 205 is fixed to the cutter pressing cylinder 204, the film paper suction head 203 is fixed to the suction head pressing cylinder 202, and the cutter pressing cylinder 204 and the suction head pressing cylinder 202 are fixed to the second base 201.

[0022] like Figure 5 As shown, the roller assembly 300 includes a liftable pressure roller 308. The roller assembly 300 includes a servo motor 302 fixed on the roller assembly base plate 301. The servo motor 302 is connected to a lead screw 304 via a coupling 303. The lead screw 304 and a linear bearing 310 are fixed to a lifting block 305. A pressure roller lifting cylinder 306 is fixed to the lifting block 305. The pressure roller 308 is fixed to a pressure roller floating part 307, and the pressure roller floating part 307 is fixed to the pressure roller lifting cylinder 306.

[0023] like Figure 6 As shown, the film-dispensing roller assembly 400 includes a first main synchronous pulley 402 mounted on a first rotating motor 401, which drives a first driven synchronous pulley 403 to rotate via a first synchronous belt 404. The first driven synchronous pulley 403 is mounted at the tail end of a first rotating shaft 405, and the film-dispensing disc 406 is mounted at the head of the first rotating shaft 405.

[0024] like Figure 7 As shown, the waste film collection assembly 500 includes a second main synchronous pulley 502 mounted on a second rotating motor 501, which drives a second driven synchronous pulley 503 to rotate via a second synchronous belt 504. The second driven synchronous pulley 503 is mounted at the tail end of the second rotating shaft 505, and the waste film collection disc 506 is mounted at the head of the second rotating shaft 505.

[0025] like Figure 1As shown, the film feeding wheel assembly 400 and the waste film collection assembly 500 are equipped with a film pulling counterweight shaft 602, a film fixing cylinder 603, a waste film detection shaft 604, a film guide wheel 601 and a waste film tearing shaft 605 on the film paper winding path.

[0026] When this utility model is in operation, the manual operation places the film paper onto the film paper suction head 203 and holds it in place. The head of the moving platform 42 holds the lead frame and moves it to below the film paper suction head 203. The suction head pressing cylinder 202 controls the film paper suction head 203 to press down, so that the film paper is attached to the head of the lead frame. Then, the suction head pressing cylinder 202 controls the film paper suction head 203 to rise. The lead frame moves to below the pressure roller 308. The servo motor 302 drives the pressure roller lifting cylinder 306 to descend. The pressure roller lifting cylinder 306 controls the pressure roller 308 to descend and press against the film paper at the head of the lead frame. The moving platform 41 continues to move forward. After the entire frame is covered, the forward extension cylinder 102 controls the lower cutter 103 to press against the upper cutter 205. The cutter pressing cylinder 204 controls the upper cutter 205 to descend and cut the film paper. The cutter pressing cylinder 204 controls the upper cutter 205 to rise. The forward extension cylinder 102 controls the lower cutter 103 to retract. The pressure roller lifting cylinder 306 controls the pressure roller 308 to rise. The film application process for one frame is completed. The subsequent processes continue to cycle according to the above steps.

[0027] Membrane paper processing flow: like Figure 8 As shown, the film-laying tray 406 rotates clockwise, and the film-pulling counterweight shaft 602 pulls out the adhesive film by its own weight. The film-laying tray 406 stops rotating after the sensing plate reaches the sensing position. When the film paper needs to be cut, the film paper fixing cylinder 603 presses down to ensure the film paper does not fall off. When waste film is collected after application, the waste film-tearing shaft 605 moves upward via a motor, separating the waste film from the film paper. When the waste film detection shaft 604 detects the correct position, the waste film-tearing shaft 605 stops rising, and the waste film collection tray 506 rotates counterclockwise to collect the excess waste film.

Claims

1. A film-applying roller device, characterized in that: The system includes a mounting base plate (600), a film-feeding wheel assembly (400) and a waste film collection assembly (500) disposed on both sides of the upper part of the mounting base plate (600); the lower part of the mounting base plate (600) is provided with a lower cutter assembly (100), an upper cutter assembly (200), and a roller assembly (300); a movable module (42) is located below the mounting base plate (600), and a movable platform (41) for placing the lead frame is provided on the movable module (42). The lower cutter assembly (100) includes a retractable lower cutter (103); the upper cutter assembly (200) includes a liftable film paper suction head (203) and a liftable upper cutter (205); the upper cutter (205) and the lower cutter (103) cooperate to cut the film paper; the roller assembly (300) includes a liftable pressure roller (308). After the film is released by the film release wheel assembly (400), it separates from the bottom film and is pulled to the film suction head (203); the separated bottom film is wound up by the waste film collection assembly (500).

2. The film-applying roller device as described in claim 1, characterized in that: The lower cutter (103) is fixed on the forward extension cylinder (102), which is fixed on the first base (101); the upper cutter (205) is fixed on the cutter pressing cylinder (204); the film paper suction head (203) is fixed on the suction head pressing cylinder (202); and the cutter pressing cylinder (204) and the suction head pressing cylinder (202) are fixed on the second base (201).

3. The film-applying roller device as described in claim 1, characterized in that: The roller assembly (300) includes a servo motor (302) fixed on the roller assembly base plate (301). The servo motor (302) is connected to a lead screw (304) via a coupling (303). The lead screw (304) and a linear bearing (310) are fixed on a lifting block (305). A pressure roller lifting cylinder (306) is fixed on the lifting block (305). The pressure roller (308) is fixed on a pressure roller floating part (307). The pressure roller floating part (307) is fixed on the pressure roller lifting cylinder (306).

4. The film-applying roller device as described in claim 3, characterized in that: A position sensor (309) is also provided on the base plate (301) of the roller assembly.

5. The film-applying roller device as described in any one of claims 1-4, characterized in that: The film-dispensing wheel assembly (400) includes a first main synchronous pulley (402) mounted on a first rotating motor (401), which drives a first driven synchronous pulley (403) to rotate via a first synchronous belt (404). The first driven synchronous pulley (403) is mounted at the tail end of a first rotating shaft (405), and the film-dispensing disc (406) is mounted at the head of the first rotating shaft (405). The waste film collection assembly (500) includes a second main synchronous pulley (502) mounted on a second rotating motor (501), which drives a second driven synchronous pulley (503) to rotate via a second synchronous belt (504). The second driven synchronous pulley (503) is mounted at the tail end of a second rotating shaft (505), and the waste film collection disc (506) is mounted at the head of the second rotating shaft (505).

6. The film-applying roller device as described in claim 5, characterized in that: The film feeding wheel assembly (400) and the waste film receiving assembly (500) are provided with a film pulling counterweight shaft (602), a film fixing cylinder (603), a waste film detection shaft (604), a film guide wheel (601) and a waste film tearing shaft (605) on the film paper winding path.

Images