High-speed film tearing equipment for QFN (Quad Flat No-lead) frame

Abstract

The invention belongs to the technical field of semiconductor packaging, and relates to high-speed film tearing equipment for a QFN (Quad Flat No-lead) frame. The equipment mainly comprises a frame feeding and discharging mechanism (1), a frame sucking and placing mechanism (2), a vacuum film tearing platform movement mechanism (3), a glue film separating mechanism (4) and a glue film clamping movement mechanism (5), the frame feeding and discharging mechanism (1) comprises a plurality of frame material boxes (11) used for containing QFN frames, the frame sucking and placing mechanism (2) is used for sucking the QFN frames and conveying the QFN frames to the vacuum film tearing platform movement mechanism (3), and the vacuum film tearing platform movement mechanism (3) drives an adhesive film separation ejector pin (315) to stretch out to achieve preliminary separation of adhesive films. And then the adhesive film is thoroughly separated from the QFN frame through the adhesive film separation mechanism (4), and finally the adhesive film is clamped and taken away by the adhesive film clamping movement mechanism (5). The adhesive film on the QFN frame can be quickly removed, the production efficiency is improved, and the product quality is improved.

Description

Technical Field

[0001] The present application belongs to the field of semiconductor packaging technology, and in particular relates to a QFN frame high-speed film tearing device. Background Art

[0002] With the development of semiconductor technology, lead frame products have become one of the most mature products in semiconductor packaging. QFN is a square surface mount package without pins, and is currently one of the main packaging forms for mid-to-high-end semiconductor integrated circuit packaging. Due to the advantages of QFN packaging such as good electrical and thermal performance, high density, small size, and light weight, its application in the field of electronic packaging has developed rapidly.

[0003] The QFN packaging production process requires that a polyimide film be attached to the back of the QFN lead frame before the die bonding process or after the wire bonding process. This film is a semiconductor packaging electronic material with certain viscosity, high temperature resistance, and corrosion resistance. After the film is attached to the back of the frame, it can prevent the resin from squeezing out and leaking from the hollow gap of the frame during the molding process, causing overflow problems, thereby causing poor packaging. After the molding is completed, the film on the back of the lead frame needs to be torn off to complete subsequent electroplating, cutting and other processes.

[0004] At present, the conventional method of tearing off the lead frame film is to tear it off manually. Due to the strong viscosity of the film, the manual operation force cannot be accurately controlled, and the operation standards are difficult to unify. Manual film tearing is easy to cause product quality problems such as film breakage and frame deformation. In addition, manual operation is inefficient and requires a lot of manpower. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides a QFN frame high-speed film tearing device, which mainly includes a frame loading and unloading mechanism, a frame suction and placement mechanism, a vacuum film tearing platform motion mechanism, a film separation mechanism, and a film clamping motion mechanism;

[0006] Among them, the frame loading and unloading mechanism includes a plurality of frame material boxes for holding QFN frames, the frame suction and placement mechanism includes a track arranged above the frame loading and unloading mechanism and the vacuum film tearing platform movement mechanism, and a suction mechanism moving on the track, the suction mechanism has a spring buffer suction cup for sucking the QFN frame and transporting it to the vacuum film tearing platform movement mechanism, the vacuum film tearing platform movement mechanism has a vacuum platform and a plurality of groups of film separation pins located on the vacuum platform, after the vacuum platform absorbs the QFN frame, the film separation pins are driven to extend and pass through the end gaps of the QFN frame, and then the film on the QFN frame is lifted, the film separation mechanism includes a film separation sheet, the film separation sheet is inserted between the film and the QFN frame to separate the film from the QFN frame, and the film clamping movement mechanism includes a film clamping mechanism, and the film clamping mechanism drives the film clamps thereon to clamp the film.

[0007] Preferably, the frame loading and unloading mechanism also includes a frame lifting mechanism and a material box moving mechanism, the material box moving mechanism includes a material box moving mechanism bottom plate, on which is a material box moving positioning track, the frame lifting mechanism includes a lifting mechanism bottom plate, on which is a material box positioning track docking with the material box moving positioning track, the material box positioning track is located below the track of the frame suction and placement mechanism, the end of the material box moving positioning track away from the material box positioning track is a manual operation end, and the frame material box is driven to move on the material box moving positioning track and the material box positioning track by the driving mechanism.

[0008] Preferably, a movable bottom plate is provided at the bottom of the frame material box, a plurality of QFN frames are stacked on the movable bottom plate, a movable pin is provided on the side of the movable bottom plate, the movable pin is inserted into a strip hole extending up and down on the side of the frame material box, and the frame lifting mechanism includes an electric push rod, and when the QFN frame moves to the material box positioning track, the movable bottom plate is pushed up and down in the frame material box by the electric push rod.

[0009] Preferably, a column is provided on the bottom plate of the frame lifting mechanism, and a position sensor is provided on the top of the column. The position sensor faces the frame material box on the material box positioning track to monitor the height of the QFN frames stacked in the frame material box.

[0010] Preferably, the suction mechanism of the frame suction and placement mechanism includes a frame loading suction mechanism and a frame unloading suction mechanism, both of which include a suction cup fixing plate, a plurality of spring buffer suction cups are arranged below the suction cup fixing plate, and a frame pressing plate is also arranged below the suction cup fixing plate, after the QFN frame is sucked up by the plurality of spring buffer suction cups and transferred to the vacuum film tearing platform movement mechanism, it is pressed onto the vacuum platform by the frame pressing plate, the spring buffer suction cup and the frame pressing plate are driven up and down by the cylinder, the frame loading suction mechanism is used for sucking the untorn QFN frame from the frame material box, and the frame unloading suction mechanism is used for placing the torn QFN frame into the frame material box.

[0011] Preferably, the vacuum platform of the vacuum film tearing platform motion mechanism is provided with X-direction motion positioning clamps and X-direction fixed positioning blocks on both sides along the X direction, and the vacuum platform is provided with Y-direction motion positioning clamps and Y-direction fixed positioning blocks on both sides along the Y direction, and the QFN frame is positioned to fit the X-direction fixed positioning block and the Y-direction fixed positioning block by driving the X-direction motion positioning clamp and the Y-direction motion positioning clamp.

[0012] Preferably, the vacuum platform absorbs the QFN frame through a plurality of groups of vacuum suction cups arranged thereon.

[0013] Preferably, the film separation mechanism further comprises a film blowing nozzle, which is arranged above the film separation sheet and faces the film separation sheet, and is used to blow up the film separated by the film separation sheet.

[0014] Preferably, the film separation mechanism further comprises an air blowing pressure regulating valve, which is arranged on a ventilation pipeline connected to the film blowing nozzle.

[0015] Preferably, the clamping motion mechanism also includes a motion timing belt, a linear guide rail, and a motion motor. The motion motor drives the film clamping mechanism to move along the linear guide rail through the motion timing belt. The film clamping mechanism also includes a film blowing nozzle for blowing the film into a waste box after the film clamp releases the clamped film.

[0016] The present application can quickly remove the adhesive film on the QFN frame, thereby improving production efficiency and enhancing product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an axonometric diagram of a preferred embodiment of the QFN frame high-speed film tearing device of the present application.

[0018] Figure 2 This application Figure 1 Left side view of the illustrated embodiment.

[0019] Figure 3 It is a schematic diagram of the structure of the frame loading and unloading mechanism.

[0020] Figure 4 It is a schematic diagram of the structure of the frame material box and the frame lifting mechanism.

[0021] Figure 5 This is a schematic diagram of the installation of the frame suction placement mechanism.

[0022] Figure 6 It is a schematic diagram of the structure of the frame suction and placement mechanism.

[0023] Figure 7 It is a schematic diagram of the motion mechanism of the vacuum film tearing platform.

[0024] Figure 8 It is a schematic diagram of the structure of the vacuum film tearing platform.

[0025] Fig. 9 It is a schematic diagram of the structure of the film separation mechanism.

[0026] Fig.10 It is a schematic diagram of the film clamping motion mechanism.

[0027] Fig.11 Schematic diagram of the film clamping mechanism.

[0028] Among them, 1-frame loading and unloading mechanism, 11-frame material box, 111-QFN frame, 112-frame material box, 113-material box handle, 114-movable bottom plate, 115-movable pin, 12-frame lifting mechanism, 121-lifting mechanism bottom plate, 122-material box positioning track, 123-electric push rod, 124-guide column, 125-position sensor, 126-front separation plate, 13-material box moving mechanism, 131-material box moving mechanism bottom plate, 132-material box moving fork, 133-material box moving positioning track;

[0029] 2-frame suction placement mechanism, 21-frame loading suction mechanism, 22-frame unloading suction mechanism, 211-front upper and lower cylinders, 212-rear upper and lower cylinders, 213-frame pressing plate cylinder, 214-frame pressing plate, 215-spring buffer suction cup, 216-suction cup fixing plate;

[0030] 3- Vacuum film tearing platform motion mechanism, 31- Vacuum film tearing platform, 311- Vacuum platform, 312- Y direction motion positioning clamp, 313- X direction motion positioning clamp, 314- Y direction fixed positioning block, 315- Film separation ejector pin, 316- X direction fixed positioning block, 317- Vacuum suction cup, 318- Vacuum sensor, 32- Mechanism fixed bottom plate, 33- Linear guide rail, 34- Motion motor;

[0031] 4-adhesive film separation mechanism, 41-adhesive film separation back plate, 42-adhesive film separation upper and lower cylinders, 43-adhesive film separation sheet, 44-adhesive film blowing nozzle, 45-blowing nozzle fixing block, 46-blowing pressure regulating valve;

[0032] 5-film clamping motion mechanism, 51-film clamping mechanism, 511-film clamping upper and lower cylinders, 512-film clamping front and rear cylinders, 513-film clamping cylinders, 514-film clamp, 515-film blowing nozzle, 516-film detection sensor, 52-motion synchronous belt, 53-linear guide rail, 54-motion motor. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the implementation of this application will be described in more detail in combination with the drawings in the implementation of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described implementation is a part of the implementation of this application, not all of the implementations. The implementation described below with reference to the drawings is exemplary and is intended to be used to explain this application, and cannot be understood as a limitation on this application. Based on the implementation in this application, all other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The implementation of this application is described in detail below in combination with the drawings.

[0034] The purpose of this application is to provide a QFN frame high-speed film tearing device to achieve fully automated operation of the QFN frame film tearing process.

[0035] The QFN frame high-speed film tearing device provided by this application is as follows Figure 1 and Figure 2 As shown, it mainly includes a frame loading and unloading mechanism 1, a frame suction placement mechanism 2, a vacuum film tearing platform motion mechanism 3, a film separation mechanism 4, and a film clamping motion mechanism 5. The equipment can achieve efficient and high-quality film tearing of the QFN frame after the plastic sealing process. The left and right direction when a person stands in front of the equipment is defined as the X direction, and the front and back direction is the Y direction.

[0036] The frame loading and unloading mechanism 1 includes a plurality of frame material boxes 11 for holding QFN frames 111, such as Figure 3 and Figure 4 As shown, the QFN frame 111 in the frame material box 11 can be sucked by the frame suction placement mechanism 2, and the frame suction placement mechanism 2 includes a track arranged above the frame loading and unloading mechanism 1 and the vacuum film tearing platform movement mechanism 3, and a suction mechanism moving on the track, such as Figure 5 and Figure 6As shown, the suction mechanism has a spring buffer suction cup 215 for sucking the QFN frame 111, so as to suck the QFN frame 111 from the frame material box 11 or put the sucked QFN frame 111 into the frame material box 11, and the sucked QFN frame 111 is transported to the vacuum film tearing platform motion mechanism 3, refer to Figure 7 and Figure 8 The vacuum film tearing platform motion mechanism 3 comprises a vacuum platform 311 and a plurality of film separation ejector pins 315 located on the vacuum platform 311. After the vacuum platform 311 adsorbs the QFN frame 111, the film separation ejector pins 315 are driven to extend and pass through the end gap of the QFN frame 111, and then the film on the QFN frame 111 is lifted up, and then the film separation mechanism 4 separates the film. Fig. 9 As shown, the film separation mechanism 4 includes a film separation sheet 43, which is inserted between the film and the QFN frame 111 to separate the film from the QFN frame. The vacuum film tearing platform motion mechanism 3 also drives the QFN frame 111 to move to the position where the film clamping motion mechanism 5 is located. Fig.10 and Fig.11 As shown, the film clamping movement mechanism 5 includes a film clamping mechanism 51 , and the film clamping mechanism 51 drives the film clamp 514 thereon to clamp the film.

[0037] In some optional embodiments, the frame loading and unloading mechanism 1 also includes a frame lifting mechanism 12 and a material box moving mechanism 13. The material box moving mechanism 13 includes a material box moving mechanism bottom plate 131, on which is a material box moving positioning rail 133. The frame lifting mechanism 12 includes a lifting mechanism bottom plate 121, on which is a material box positioning rail 122 docked with the material box moving positioning rail 133. The material box positioning rail 122 is located below the track of the frame suction and placement mechanism 2. The end of the material box moving positioning rail 133 away from the material box positioning rail 122 is a manual operation end, and the frame material box 11 is driven by a driving mechanism to move on the material box moving positioning rail 133 and the material box positioning rail 122.

[0038] In this embodiment, the frame loading and unloading mechanism 1 is mainly used for transporting the frame material box 11. Figure 1 and Figure 3 As shown, the present application arranges 5 sets of frame loading and unloading mechanisms 1 on the operating platform, which are evenly arranged in the X direction at the front of the equipment, and are used for loading and unloading various materials such as untorn film frames, finished product frames, release paper, defective frames, etc. Figure 3In the figure, the leftmost frame magazine 11 is located at the rearmost end of the magazine moving positioning track 133 along the Y axis, and this end is the manual operation end. The QFN frame 111 is manually placed in the frame magazine 11, or the QFN frame 111 stored in the frame magazine 11 is taken out. The frame magazine 11 loaded with the QFN frame 111 moves forward along the Y axis and stops on the magazine positioning track 122. Figure 3 In the figure, the positions of the other four frame magazines 11 are located. The moving process is based on the magazine moving fork 132, which drives the frame magazine 11 from the magazine moving positioning track 133 to the magazine positioning track 122.

[0039] refer to Figure 4 At the magazine positioning track 122, the bottom of the frame magazine 11 is a frame lifting mechanism 12, and the top is a frame suction placement mechanism 2. The frame lifting mechanism 12 lifts the QFN frame 111 in the frame magazine 11 so that the frame suction placement mechanism 2 can absorb and transfer it. For this reason, the present application first designs the frame magazine 11. For example, in some optional embodiments, a movable bottom plate 114 is provided at the bottom of the frame magazine 11, and multiple QFN frames 111 are stacked and placed on the movable bottom plate 114. The side of the movable bottom plate 114 has a movable pin 115, and the movable pin 115 is inserted into a strip hole extending up and down on the side of the frame magazine 11. The frame lifting mechanism 12 includes an electric push rod 123. When the QFN frame 111 moves to the magazine positioning track 122, the movable bottom plate 114 is pushed up and down in the frame magazine 11 by the electric push rod 123.

[0040] In this embodiment, after the frame material box 11 is fixed on the top of the frame lifting mechanism 12 by the material box fixing rail 122 and the front separation plate 126, if this material box is used for loading untorn film frames, the electric push rod 123 moves upward to push the movable bottom plate 114, driving the QFN frame 111 stacked on it to move upward. As the number of untorn film frames in the material box continues to decrease, the movable bottom plate 114 continues to move upward until there are no untorn film frames in the frame material box 11. If this material box is used for unloading finished film frames after film tearing, the electric push rod 123 first moves upward to push the movable bottom plate 114 to the upper limit position. After placing a piece of QFN frame 111 in the frame material box 11, the electric push rod 123 moves downward for a certain distance, and the movable bottom plate 114 also moves downward under the action of gravity. As the number of film-torn frames in the material box continues to increase, the movable bottom plate 114 continues to drop until the movable bottom plate 114 drops to the lower limit position.

[0041] In this embodiment, the movable pins 115 usually include 4, and correspondingly, the number of the strip holes extending up and down on the side of the frame material box 11 is also 4, such as Figure 4 As shown, two are arranged on each of the left and right sides.

[0042] In some optional embodiments, a column is provided on the lifting mechanism bottom plate 121 of the frame lifting mechanism 12, and a position sensor 125 is provided on the top of the column. The position sensor 125 is opposite to the frame material box 11 on the material box positioning track 122 to monitor the height of the QFN frame 111 stacked in the frame material box 11.

[0043] In this embodiment, the position sensor 125 is used to monitor the rising or falling position of the QFN frame. When the QFN frame 111 moves to the position of the position sensor 125, the electric push rod 123 stops moving. Regardless of the number of frames in the material box, the position of the top QFN frame in the material box is always kept stable.

[0044] In some optional embodiments, the suction mechanism of the frame suction and placement mechanism 2 includes a frame loading suction mechanism 21 and a frame unloading suction mechanism 22. The frame loading suction mechanism 21 and the frame unloading suction mechanism 22 both include a suction cup fixing plate 216. A plurality of spring buffer suction cups 215 are arranged below the suction cup fixing plate 216. A frame pressing plate 214 is also arranged below the suction cup fixing plate 216. After the QFN frame 111 is sucked up by the plurality of spring buffer suction cups 215 and transferred to the vacuum film tearing platform movement mechanism 3, it is pressed onto the vacuum platform 311 by the frame pressing plate 214. The spring buffer suction cup 215 and the frame pressing plate 214 are driven up and down by the cylinder. The frame loading suction mechanism 21 is used to suck the untorn QFN frame 111 from the frame material box 11, and the frame unloading suction mechanism 22 is used to place the torn QFN frame 111 into the frame material box 11.

[0045] like Figure 1 and Figure 5 As shown, the frame suction placement mechanism 2 drives the suction mechanism to move left and right in the X direction and stays above each group of frame material boxes 11 and the vacuum film tearing platform 31. The frame loading suction mechanism 21 is used to suck the QFN frame from the frame material box 11 and place it on the vacuum film tearing platform 31 during loading, and the frame unloading suction mechanism 22 is used to suck the QFN frame from the vacuum film tearing platform 31 and place it in the frame material box 11 during unloading.

[0046] refer to Figure 6 , frame loading is carried out according to the following steps:

[0047] (1) The front up-down cylinder 211 and the rear up-down cylinder 212 drive the suction cup fixing plate 216 and the plurality of spring buffer suction cups 215 fixed thereon to move downward, and vacuum-absorb the QFN frame 111 from the frame material box 11.

[0048] (2) The front upper and lower cylinders 211 and the rear upper and lower cylinders 212 are lifted, and the QFN frame is moved to the top of the vacuum film tearing platform 31 by the motion mechanism.

[0049] (3) The front up-and-down cylinder 211 and the rear up-and-down cylinder 212 descend to place the QFN frame on the vacuum film tearing platform 21.

[0050] (4) The upper and lower cylinders 212 are lifted up, and the frame pressing plate cylinder 213 drives the frame pressing plate 214 to move downward, flattening the QFN frame to limit the warping of the QFN frame, and waiting for the vacuum film tearing platform to position the QFN frame.

[0051] (5) After the waiting is completed, the front upper and lower cylinders 211 and the frame pressure plate cylinder 213 are lifted to complete the frame loading.

[0052] The structure of the frame material unloading suction mechanism 22 and the material unloading suction action and the type of the frame material loading suction mechanism will not be repeated.

[0053] In some optional embodiments, the vacuum platform 311 of the vacuum film tearing platform motion mechanism 3 is provided with X-direction motion positioning clamps 313 and X-direction fixed positioning blocks 316 on both sides along the X direction, and the vacuum platform 311 is provided with Y-direction motion positioning clamps 312 and Y-direction fixed positioning blocks 314 on both sides along the Y direction. By driving the X-direction motion positioning clamps 313 and the Y-direction motion positioning clamps 312, the QFN frame 111 is positioned to fit the X-direction fixed positioning blocks 316 and the Y-direction fixed positioning blocks 314.

[0054] like Figure 8 As shown, after the frame loading and sucking mechanism 21 places the QFN frame 111 on the vacuum platform 311 of the vacuum film tearing platform 31, the Y-direction fixed positioning block 314 is pushed out and exceeds the upper surface of the vacuum platform 311, and the Y-direction moving positioning clamp 312 pushes the QFN frame 111 in the Y direction and abuts against the Y-direction fixed positioning block 314, completing the positioning of the frame in the Y direction. Then, the X-direction moving positioning clamp 313 pushes the QFN frame in the X direction and abuts against the X-direction fixed positioning block 316, completing the positioning of the frame in the X direction.

[0055] In some optional embodiments, the vacuum platform 311 absorbs the QFN frame 111 through a plurality of groups of vacuum suction cups 317 arranged thereon. In this embodiment, after the frame is positioned, the vacuum system generates vacuum through a plurality of groups of vacuum suction cups 317 evenly distributed on the vacuum platform 311, and absorbs the QFN frame 111 onto the vacuum platform 311.

[0056] In some optional embodiments, the vacuum film tearing platform 31 further includes a vacuum sensor 318 and other sensors for detecting whether the frame is correctly positioned and adsorbed.

[0057] It should be noted that the vacuum film tearing platform mechanism 3 also includes a mechanism fixed base plate 32, a linear guide rail 33, a motion motor 34 and other parts, such as Figure 7 As shown, the motion motor 34, the linear guide rail 33 and other motion mechanisms are fixed on the mechanism fixed bottom plate 32, driving the vacuum film tearing platform 31 to move forward and backward in the Y direction, as shown in FIG. Figure 1 As shown, on the side close to the manual work in the Y direction, it is used to cooperate with the frame suction placement mechanism 2 and the film separation mechanism 4. After moving to the side away from the manual work in the Y direction, it is used to cooperate with the film clamping mechanism 5. Two groups of this mechanism are provided, located on the left and right sides of the frame loading and unloading mechanism 1.

[0058] In some optional embodiments, the film separation mechanism 4 further includes a film blowing nozzle 44, which is disposed above the film separation sheet 43 and faces the film separation sheet 43, for blowing up the film separated by the film separation sheet 43.

[0059] like Fig. 9 As shown, the film separation mechanism 4 includes a film separation back plate 41, upper and lower film separation cylinders 42, a film separation sheet 43, a film blowing nozzle 44, a blowing nozzle fixing block 45 and other parts. The vacuum film tearing platform 31 transfers the QFN frame 311 to the bottom of the film separation mechanism 4, and the upper and lower film separation cylinders 42 drive the film separation sheet 43 and the film blowing nozzle 44 to move downward. The film separation sheet 43 is inserted into the gap between the film and the QFN frame to further separate the film from the frame. At the same time, air is blown through the film blowing nozzle 44 to ensure that the separated film will not adhere to the QFN frame again. The blowing nozzle fixing block 45 is used to fix and adjust the angle of the film blowing nozzle 44. The entire device has two sets of film separation mechanisms 4, corresponding to the two sets of vacuum film tearing platform mechanisms 3.

[0060] In some optional embodiments, the film separation mechanism 4 further includes an air blowing pressure regulating valve 46 , which is disposed on a ventilation pipeline connected to the film blowing nozzle 444 and is used to adjust the pressure and flow rate of the blowing air.

[0061] In some optional embodiments, the clamping motion mechanism 5 also includes a motion timing belt 52, a linear guide rail 53, and a motion motor 54. The motion motor 54 drives the film clamping mechanism 51 to move along the linear guide rail 53 through the motion timing belt 52. The film clamping mechanism 51 also includes a film blowing nozzle 515, which is used to blow the film into the waste box after the film clamp 514 releases the clamped film.

[0062] like Fig.10As shown, the motion motor 54 drives the film clamping mechanism 51 to move in the X direction through the motion synchronous belt 52. The film clamping mechanism 51 is fixed on the linear guide rail 53 to achieve the clamping of the QFN frame film on the two sets of vacuum film tearing platform mechanisms 3 and the complete separation of the film and the QFN frame. Fig.11 As shown, it is composed of film clamping upper and lower cylinders 511, film clamping front and rear cylinders 512, film clamping cylinders 513, film clamps 514, film blowing nozzles 515, film detection sensors 516 and other parts. When the film separation mechanism 4 separates the film from the frame to a certain length, the film clamping mechanism 51 moves to the corresponding position of the vacuum film tearing platform 31, and the film clamping front and rear cylinders 512 extend forward, then the film clamping upper and lower cylinders 511 descend, and several film clamping cylinders 513 drive several groups of film clamps 514 fixed thereon to close, firmly clamp the separated film, and the vacuum film tearing platform 31 moves forward along the Y direction to complete the complete separation of the film and the frame. A pair of film detection sensors are installed on each group of film clamps 514 to detect whether the film clamps 514 clamp the film. After the film and the frame are completely separated, the film clamping mechanism 51 moves to the top of the waste box, opens the film clamp 514, and blows air through the film blowing nozzle 515 to throw the torn film into the waste box.

[0063] The overall action flow of the QFN frame high-speed film tearing equipment provided in this application is as follows:

[0064] 1. Alternately stack the untorn film frames and release papers in the frame material box 11.

[0065] 2. Place the frame magazine 11 on the magazine moving positioning track 133 .

[0066] 3. The material box moving mechanism 13 moves the frame material box 11 to the top of the frame lifting mechanism 12 and fixes it.

[0067] 4. The frame lifting mechanism 12 lifts the QFN frame in the frame material box 11 to a set position.

[0068] 5. The frame suction placement mechanism 2 moves along the X direction to the top of the corresponding frame material box 11 and sucks a QFN frame.

[0069] 6. The vacuum film tearing platform 31 moves forward along the Y direction to the loading position.

[0070] 7. The frame suction placement mechanism 2 moves along the X direction to above the vacuum film tearing platform 31 , and places the QFN frame on the vacuum film tearing platform 31 .

[0071] 8. The vacuum film tearing platform 31 positions and adsorbs the QFN frame.

[0072] 9. The frame suction placement mechanism 2 can perform other operations.

[0073] 10. The vacuum film-tearing platform 31 performs preliminary separation on the film and transfers the QFN frame to the film-separating station.

[0074] 11. The adhesive film separation mechanism 4 further separates the adhesive film and the frame.

[0075] 12. The film clamping mechanism 51 moves to the top of the vacuum film tearing platform 31 to clamp the separated film.

[0076] 13. The vacuum film tearing platform 31 moves forward along the Y direction to the unloading position, and the film and the frame are completely separated.

[0077] 14. The film clamping mechanism 51 moves to the top of the waste box to discard the separated film.

[0078] 15. The frame suction placement mechanism 2 moves along the X direction to the top of the vacuum film tearing platform 31 to suck the frame after film tearing.

[0079] 16. The frame suction placement mechanism 2 places the frame after film tearing in the product frame material box 11.

[0080] Since the equipment is provided with several groups of frame material boxes 11, two groups of vacuum film tearing platforms 21, and film separation mechanism 4, by optimizing the action flow of each mechanism, the two groups of vacuum film tearing platforms 21 operate alternately, which can maximize the production efficiency of the entire equipment. The equipment considers the problems that may arise in each link, adopts corresponding solutions, realizes the automation of each link, can effectively maintain the quality stability of the process, and reduce the production of defective products.

[0081] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the scope of protection of the present application.

Claims

1. A QFN frame high-speed film tearing device, characterized in that: It comprises a frame loading and unloading mechanism (1), a frame suction and placement mechanism (2), a vacuum film tearing platform movement mechanism (3), a film separation mechanism (4), and a film clamping movement mechanism (5); The frame loading and unloading mechanism (1) comprises a plurality of frame material boxes (11) for holding QFN frames (111); the frame suction placement mechanism (2) comprises a track arranged above the frame loading and unloading mechanism (1) and the vacuum film tearing platform movement mechanism (3); and a suction mechanism moving on the track; the suction mechanism has a spring buffer suction cup (215) for sucking the QFN frame (111) and transporting it to the vacuum film tearing platform movement mechanism (3); the vacuum film tearing platform movement mechanism (3) has a vacuum platform (311) and a plurality of sets of film separation devices located on the vacuum platform (311). The ejector pin (315) and the vacuum platform (311) drive the film separation ejector pin (315) to extend and pass through the end gap of the QFN frame (111) after adsorbing the QFN frame (111), and then lift up the film on the QFN frame (111). The film separation mechanism (4) includes a film separation sheet (43), which is inserted between the film and the QFN frame (111) to separate the film from the QFN frame. The film clamping movement mechanism (5) includes a film clamping mechanism (51), which drives the film clamp (514) thereon to clamp the film.

2. The QFN frame high-speed film tearing device according to claim 1, characterized in that: The frame loading and unloading mechanism (1) further comprises a frame lifting mechanism (12) and a material box moving mechanism (13); the material box moving mechanism (13) comprises a material box moving mechanism bottom plate (131) on which a material box moving positioning track (133) is disposed; the frame lifting mechanism (12) comprises a lifting mechanism bottom plate (121) on which a material box positioning track (122) docking with the material box moving positioning track (133) is disposed; the material box positioning track (122) is located below the track of the frame suction placement mechanism (2); the end of the material box moving positioning track (133) away from the material box positioning track (122) is a manual operation end; the frame material box (11) is driven by a driving mechanism to move on the material box moving positioning track (133) and the material box positioning track (122).

3. The QFN frame high-speed film tearing device according to claim 2, characterized in that: A movable bottom plate (114) is provided at the bottom of the frame material box (11), and a plurality of QFN frames (111) are stacked and placed on the movable bottom plate (114). A movable pin (115) is provided on the side of the movable bottom plate (114), and the movable pin (115) is inserted into a strip hole extending up and down on the side of the frame material box (11). The frame lifting mechanism (12) includes an electric push rod (123). When the QFN frame (111) moves onto the material box positioning track (122), the movable bottom plate (114) is pushed up and down in the frame material box (11) by the electric push rod (123).

4. The QFN frame high-speed film tearing device according to claim 3, characterized in that: A column is arranged on the lifting mechanism bottom plate (121) of the frame lifting mechanism (12), and a position sensor (125) is arranged on the top of the column. The position sensor (125) is directly opposite to the frame material box (11) located on the material box positioning track (122) to monitor the height of the QFN frame (111) stacked in the frame material box (11).

5. The QFN frame high-speed film tearing device according to claim 1, characterized in that: The suction mechanism of the frame suction placement mechanism (2) comprises a frame loading suction mechanism (21) and a frame unloading suction mechanism (22), the frame loading suction mechanism (21) and the frame unloading suction mechanism (22) both comprising a suction cup fixing plate (216), a plurality of spring buffering suction cups (215) being arranged below the suction cup fixing plate (216), a frame pressing plate (214) being further arranged below the suction cup fixing plate (216), the QFN frame (111) being clamped by the plurality of spring buffering suction cups (21 5) After being sucked up and transferred to the vacuum film-tearing platform movement mechanism (3), the frame pressing plate (214) is pressed on the vacuum platform (311), and the spring buffer suction cup (215) and the frame pressing plate (214) are driven by the cylinder to move up and down. The frame loading suction mechanism (21) is used to suck the un-torn QFN frame (111) from the frame material box (11), and the frame unloading suction mechanism (22) is used to put the QFN frame (111) after the film is torn into the frame material box (11).

6. The QFN frame high-speed film tearing device according to claim 1, characterized in that: The vacuum platform (311) of the vacuum film tearing platform motion mechanism (3) is provided with an X-direction motion positioning clamp (313) and an X-direction fixed positioning block (316) on both sides along the X direction, and the vacuum platform (311) is provided with a Y-direction motion positioning clamp (312) and a Y-direction fixed positioning block (314) on both sides along the Y direction. By driving the X-direction motion positioning clamp (313) and the Y-direction motion positioning clamp (312), the QFN frame (111) is positioned to fit the X-direction fixed positioning block (316) and the Y-direction fixed positioning block (314).

7. The QFN frame high-speed film tearing device according to claim 1, characterized in that: The vacuum platform (311) absorbs the QFN frame (111) through a plurality of groups of vacuum suction cups (317) arranged thereon.

8. The QFN frame high-speed film tearing device according to claim 1, characterized in that: The adhesive film separation mechanism (4) further comprises an adhesive film blowing nozzle (44), which is arranged above the adhesive film separation sheet (43) and directly faces the adhesive film separation sheet (43) and is used to blow up the adhesive film separated by the adhesive film separation sheet (43).

9. The QFN frame high-speed film tearing device according to claim 8, characterized in that: The film separation mechanism (4) further comprises an air blowing pressure regulating valve (46) which is arranged on a ventilation pipeline connected to the film blowing nozzle (444).

10. The QFN frame high-speed film tearing device according to claim 1, characterized in that: The clamping motion mechanism (5) further comprises a motion synchronous belt (52), a linear guide rail (53), and a motion motor (54). The motion motor (54) drives the film clamping mechanism (51) to move along the linear guide rail (53) via the motion synchronous belt (52). The film clamping mechanism (51) further comprises a film blowing nozzle (515) for blowing the film into a waste box after the film clamp (514) releases the clamped film.

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