Lead frame traction mechanism and feeding equipment

Abstract

The utility model discloses a lead frame traction mechanism and feeding equipment, which comprises a traction guide rail for guiding the movement of a lead frame and a traction device for controlling the directional movement of the lead frame, and the side wall of the inner side of the traction guide rail is in sliding connection with a bearing device. The surface of the bearing device is provided with a plurality of bearing openings for accommodating the main body part of the lead frame, and the bearing openings are stepped openings and are linearly arranged at intervals along the moving direction of the bearing device. According to the utility model, a plurality of lead frames can be synchronously conveyed at one time, and the conveying efficiency and stability of the lead frames are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lead frame production, in particular to a lead frame traction mechanism and feeding equipment. Background Art

[0002] The traditional lead frame is in the shape of a strip, which is grabbed between the upper and lower packaging molds through the coordinated cooperation of belt conveyor equipment, rotating equipment, negative pressure grippers, etc. The resin material is melted and wrapped around the lead frame strip to achieve effective frame packaging processing.

[0003] Traditional lead frames are in direct contact with the conveying equipment. In the initial loading state, only one lead frame can be pulled and loaded at a time. The traditional lead frame pulling efficiency is low, and the bottom of the lead frame is in contact with the conveying equipment, which is subject to certain wear; especially for some lead frames with stepped shapes, the bottom contact area of ​​the lead frame strip is small during transportation, which affects the stability of the lead frame during transportation. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a lead frame traction mechanism and a feeding device, which can synchronously convey a plurality of lead frames at one time, thereby improving the efficiency and stability of lead frame conveyance.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A lead frame traction mechanism comprises a traction guide rail for guiding the movement of the lead frame and a traction device for controlling the directional movement of the lead frame, wherein the inner side wall of the traction guide rail is slidably connected with a bearing device, and the surface of the bearing device is provided with a plurality of bearing openings for accommodating a main part of the lead frame, wherein the bearing openings are stepped openings and are linearly spaced along the moving direction of the bearing device.

[0007] Preferably, the carrying device includes a first carrying plate slidably connected to the traction guide rail, the upper end of the first carrying plate is detachably connected to a second carrying plate, the carrying opening includes a carrying opening 1 opened on the surface of the first carrying plate and a carrying opening 2 opened on the surface of the second carrying plate, and the horizontal projection size of the carrying opening 2 is smaller than the horizontal projection size of the carrying opening 1.

[0008] Preferably, a bearing protrusion located outside the bearing opening is fixed to the upper end of the second bearing plate.

[0009] Preferably, the traction guide rail comprises two symmetrically arranged strip guide rails, and the side walls of the strip guide rails are provided with traction grooves.

[0010] Preferably, a detection device is installed at the lower end of the traction guide rail.

[0011] Preferably, the traction device comprises a telescopic device, a mounting seat is fixed to the telescopic end of the telescopic device, a clamping claw assembly is installed on the side wall of the mounting seat, and the traction device further comprises a sliding joint for controlling the linear movement of the telescopic device.

[0012] Preferably, the clamping jaw assembly comprises an upper clamping jaw and a lower clamping jaw, and the upper clamping jaw and the lower clamping jaw are movably connected via a pneumatic joint.

[0013] A lead frame feeding device comprises the lead frame traction mechanism mentioned above, and also comprises a pushing device, a material box is arranged between the pushing device and the traction guide rail, and also comprises a rotary lifting device for controlling the lifting and lowering movement of the material box.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] Through the design of the carrying device and the surface carrying opening, multiple lead frames can be pulled and transported at one time, ensuring the efficiency of lead frame transportation; and during the pulling process, no relative friction will be generated between the lead frame and the pulling guide rail, avoiding damage to the surface of the lead frame; at the same time, the stepped arrangement of the carrying opening here can effectively accommodate the stepped lead frame, increase the contact area of ​​the lead frame, and ensure the stability of the lead frame during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the lead frame pulling mechanism.

[0017] Figure 2 for Figure 1 Schematic diagram of the main structure.

[0018] Figure 3 for Figure 1 Schematic diagram of the top view structure.

[0019] Figure 4 for Figure 3 A is an enlarged structural diagram of FIG.

[0020] Figure 5 It is a three-dimensional schematic diagram of the lead frame loading equipment.

[0021] In the figure: 100, traction guide rail; 110, strip guide rail; 111, traction groove; 200, carrying device; 210, first carrying plate; 211, carrying opening one; 220, second carrying plate; 221, carrying opening two; 222, carrying protrusion; 300, lead frame; 310, main body; 320, lead part; 400, traction device; 410, telescopic device; 420, mounting seat; 430, jaw assembly; 431, upper jaw; 432, lower jaw; 500, detection device; 600, pushing device; 700, material box. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0024] The lead frame is a carrier for producing semiconductor materials. During the production of semiconductor materials, the lead frame strips and semiconductor devices need to be transported to a packaging mold to achieve hot pressing packaging of the lead frame at high temperature.

[0025] The traditional lead frame is in the shape of a strip, which is grabbed between the upper and lower packaging molds through the coordinated cooperation of belt conveyor equipment, rotating equipment, negative pressure grippers, etc. The resin material is melted and wrapped around the lead frame strip to achieve effective frame packaging processing.

[0026] Traditional lead frames are in direct contact with the conveying equipment. In the initial loading state, only one lead frame can be pulled and loaded at a time. The traditional lead frame pulling efficiency is low, and the bottom of the lead frame is in contact with the conveying equipment, which is subject to certain wear; especially for some lead frames with stepped shapes, the bottom contact area of ​​the lead frame strip is small during transportation, which affects the stability of the lead frame during transportation.

[0027] See attached Figure 1 -Attached Figure 4A lead frame traction mechanism includes a traction guide rail 100 for guiding the movement of a lead frame 300 and a traction device 400 for controlling the directional movement of the lead frame 300. The traction device 400 can traction the lead frame 300, allowing the lead frame 300 to move along the traction guide rail 100, and traction the lead frame 300 to a predetermined position, thereby completing the traction and loading of the lead frame.

[0028] A carrying device 200 is slidably connected to the inner side wall of the pulling guide rail 100, and a plurality of carrying openings for accommodating the main part 310 of the lead frame 300 are opened on the surface of the carrying device 200, and the carrying openings are stepped openings and are linearly spaced along the moving direction of the carrying device 200; during the transportation process, a plurality of lead frames 300 are respectively placed in the carrying openings, and through the design of the carrying device 200 and the surface carrying openings, a plurality of lead frames 300 can be pulled and transported at one time, thereby ensuring the efficiency of the lead frame 300 transportation; and during the pulling process, no relative friction will be generated between the lead frame 300 and the pulling guide rail 100, thereby avoiding damage to the surface of the lead frame 300; at the same time, the stepped arrangement of the carrying openings here can effectively accommodate the stepped lead frame 300, thereby increasing the contact area of ​​the lead frame bearing and ensuring the stability of the lead frame during transportation.

[0029] Please refer to the attached Figure 4 Specifically, the carrying device 200 includes a first carrying plate 210 slidably connected to the traction guide rail 100, and the upper end of the first carrying plate 210 is detachably connected to the second carrying plate 220. The carrying opening includes a carrying opening 1 211 opened on the surface of the first carrying plate 210 and a carrying opening 221 opened on the surface of the second carrying plate 220. The horizontal projection size of the carrying opening 221 is smaller than the horizontal projection size of the carrying opening 1 211. Under the combination of the first carrying plate 210, the second carrying plate 220, the carrying opening 1 211 and the carrying opening 221, a stepped carrying opening is formed. The carrying opening 221 here is adapted to the size of the main body 310, which can ensure the stability of the main body 310 during the transportation process; after the main body 310 is placed in the carrying opening 221 and sinks, the lead part 320 contacts the surface of the second carrying plate 220, which ensures the stability of the main body 310.

[0030] A bearing protrusion 222 located outside the bearing opening is fixed on the upper end of the second bearing plate 220. By setting the bearing protrusion 222, the lead part 320 can be supported from the bottom position, further ensuring the stability of the lead part 320. The above structural design is suitable for supporting the lead part 320 with a longer size and a larger gap.

[0031] Specifically, the traction guide rail 100 includes two symmetrically arranged strip guide rails 110, and the side walls of the strip guide rails 110 are provided with traction grooves 111. The distance between the two strip guide rails 110 is adjusted according to the size of the first supporting plate 210. The two sides of the first supporting plate 210 are respectively limited in the traction grooves 111 and slide relative to them.

[0032] A detection device 500 is installed at the lower end of the pulling guide rail 100. The detection device 500 here can be selected as an optical detection element, which can detect the presence and position of the upper carrier device 200 to ensure the accuracy of the conveying position of the carrier device 200 and multiple lead frames 300 on the surface of the carrier device 200.

[0033] The traction device 400 includes a telescopic device 410, a mounting seat 420 is fixed to the telescopic end of the telescopic device 410, and a clamping jaw assembly 430 is installed on the side wall of the mounting seat 420. The traction device 400 also includes a sliding joint for controlling the linear movement of the telescopic device 410. The horizontal position of the telescopic device 410 can be controlled by the sliding joint, and then the bearing device 200 is pulled by the clamping jaw assembly 430 to drive the lead frame 300 to move linearly, thereby completing the traction control process. The sliding joint here can select an existing telescopic structure or a flexible guide rail.

[0034] Specifically, the clamp assembly 430 includes an upper clamp 431 and a lower clamp 432, which are movably connected via a pneumatic joint. The clamping surfaces of the upper clamp 431 and the lower clamp 432 are parallel to the surface of the carrier device 200. The upper clamp 431 and the lower clamp 432 are controlled to approach each other to complete the clamping of the carrier device 200, thereby ensuring the stability of the carrier device 200 and the lead frame 300 during transportation.

[0035] See attached Figure 5 A lead frame feeding device includes the lead frame traction mechanism mentioned above, and also includes a pushing device 600, a material box 700 is arranged between the pushing device 600 and the traction guide rail 100, and also includes a rotating lifting device for controlling the lifting and lowering movement of the material box 700.

[0036] During the process of loading the lead frame, the pushing device 600 is controlled to enter the material box 700 to push the corresponding layer of the carrier device 200 and the multiple lead frames 300 to the side of the traction guide rail 100, and then the pushed-out carrier device 200 and the multiple lead frames 300 are pulled by the traction device 400, and the carrier device 200 and the multiple lead frames 300 are pulled to the outside to complete the traction and loading of the lead frame, and then the multiple lead frames 300 are simultaneously gripped with negative pressure and grabbed into the packaging mold to complete hot pressing packaging.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lead frame pulling mechanism, comprising a pulling rail (100) for guiding the movement of a lead frame (300) and a pulling device (400) for controlling the directional movement of the lead frame (300), characterized in that: The inner side wall of the pulling guide rail (100) is slidably connected to a bearing device (200), and a surface of the bearing device (200) is provided with a plurality of bearing openings for accommodating a main part (310) of a lead frame (300), the bearing openings being stepped openings and arranged linearly at intervals along a moving direction of the bearing device (200).

2. The lead frame pulling mechanism according to claim 1, characterized in that: The bearing device (200) comprises a first bearing plate (210) slidably connected to the traction guide rail (100); the upper end of the first bearing plate (210) is detachably connected to a second bearing plate (220); the bearing opening comprises a first bearing opening (211) opened on the surface of the first bearing plate (210) and a second bearing opening (221) opened on the surface of the second bearing plate (220); the horizontal projection size of the second bearing opening (221) is smaller than the horizontal projection size of the first bearing opening (211).

3. The lead frame pulling mechanism according to claim 2, characterized in that: A bearing protrusion (222) located outside the bearing opening is fixed to the upper end of the second bearing plate (220).

4. The lead frame pulling mechanism according to claim 1, characterized in that: The traction guide rail (100) comprises two symmetrically arranged strip-shaped guide rails (110), and a traction groove (111) is formed on the side wall of the strip-shaped guide rail (110).

5. The lead frame pulling mechanism according to claim 1, characterized in that: A detection device (500) is installed at the lower end of the traction guide rail (100).

6. The lead frame pulling mechanism according to claim 1, characterized in that: The traction device (400) comprises a telescopic device (410), a mounting seat (420) being fixed to the telescopic end of the telescopic device (410), a clamping claw assembly (430) being mounted on the side wall of the mounting seat (420), and the traction device (400) further comprises a sliding joint for controlling the linear movement of the telescopic device (410).

7. The lead frame pulling mechanism according to claim 6, characterized in that: The clamping jaw assembly (430) comprises an upper clamping jaw (431) and a lower clamping jaw (432), and the upper clamping jaw (431) and the lower clamping jaw (432) are movably connected via a pneumatic joint.

8. A lead frame feeding device, characterized in that: The lead frame traction mechanism comprises the lead frame traction mechanism according to any one of claims 1 to 7, further comprising a pushing device (600), a material box (700) being arranged between the pushing device (600) and the traction guide rail (100), and further comprising a rotary lifting device for controlling the lifting and lowering movement of the material box (700).

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