Magnetic sucker for lead frame

Abstract

The utility model relates to a magnetic sucker for a lead frame, which comprises a sucker seat. The air cylinder body is embedded in the suction cup seat; the pushing plate is fixedly mounted at the extending end of the bottom of the cylinder body; mounting screws are mounted at four corners of the bottom of the suction cup seat, a middle plate is fixedly mounted at the bottoms of the four mounting screws, a magnetic strip plate is adhered to the bottom of the middle plate, a magnetic strip is adhered to an anti-static plate, the anti-static plate is connected to the suction cup seat through screws, and during use, the magnetic strip is used for adsorbing a lead frame and then carrying the lead frame to a specified position. When the lead frame needs to be unloaded, the air cylinder drives the push plate, the push plate penetrates through the magnetic strip to push the lead frame so that the lead frame can fall off from the magnetic strip, the lead frame magnetic suction cup is an independent component, can be conveniently connected with a carrying control system of a production machine table and can be rapidly detached and replaced, and small-particle materials packaged into the iron-nickel frame are stable in carrying during automatic production. And the product percent of pass is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of material production and manufacturing equipment for small-size patch packaging of semiconductor chips, in particular to a lead frame magnetic chuck. Background Art

[0002] Currently, most traditional semiconductor packaging is produced automatically. The SOT&SOD series small particle packaging frame material is light and thin, and it is difficult for the common vacuum suction cups and grippers in the industry to achieve stable transportation. At the same time, the material of the iron-nickel frame is also prone to deformation. Therefore, unstable transportation often occurs in automatic production, leading to failures, and the product qualification rate is greatly reduced.

[0003] For example, the conductor packaging device disclosed in the authorized patent document with application number CN201821193345.3, wherein a semiconductor packaging device includes: a base; at least one shell, which is arranged on the base, and one side surface of the shell is open; at least one first template, which is arranged in the inner cavity of the shell and is arranged opposite to the bottom plate of the shell; the first surface of the first template is provided with a first groove suitable for placing the substrate to be packaged; the bottom surface of the first groove is provided with a first vacuum hole; a channel is provided inside the first template, and the first vacuum hole is connected to the channel. Through the present utility model, there is no need to provide an O-ring at the bottom of the larger base; and because the first template is small in size and easy to disassemble and assemble, and will be frequently replaced according to the different situations of the substrate to be packaged, even if an O-ring is provided at the bottom of the first template, when the O-ring is aged or worn, resulting in poor airtightness, it can be discovered in time when the first template is disassembled and replaced.

[0004] The above patent has the problem that the small particle packaging frame material is thin and light, and it is difficult to achieve stable transportation using the common vacuum suction cups and grippers in the industry. Therefore, we need to provide a lead frame magnetic suction cup. Utility Model Content

[0005] The purpose of the present utility model is to provide a lead frame magnetic suction cup, which is adhered to the anti-static plate through a magnetic strip, and the anti-static plate is screwed to the suction cup seat. When in use, the magnetic strip is used to absorb the lead frame and then transport it to a designated position. When the lead frame needs to be unloaded, the cylinder drives the push plate, and the push plate passes through the magnetic strip to push the lead frame, so that the lead frame falls off the magnetic strip. The lead frame magnetic suction cup is an independent component, which can be conveniently connected to the transportation control system of the production machine and can be quickly replaced. The material of the iron-nickel frame encapsulated in small particles can be transported stably during automatic production, and the product qualification rate is greatly improved. It solves the problem of common vacuum suction cups and grippers in the industry proposed in the above background technology. In principle, the transportation vacuum degree is low and unstable. The gripper is difficult to be grasped due to the thin material, which can easily cause material deformation and other factors that can lead to material damage and unstable machine production.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a lead frame magnetic chuck, comprising:

[0007] Suction cup seat;

[0008] and a cylinder body embedded in the suction cup seat;

[0009] A pusher plate fixedly mounted on the bottom extension end of the cylinder body;

[0010] The four corners of the bottom of the suction cup seat are all equipped with mounting screws, the bottoms of the four mounting screws are fixedly equipped with an intermediate plate, and the bottom of the intermediate plate is pasted with a magnetic strip plate.

[0011] Preferably, a fixed angle seat is fixedly installed on the top of the suction cup seat, one side of the fixed angle seat is fixedly installed on the surface of the cylinder body, and a plurality of mounting holes are opened inside the fixed angle seat.

[0012] Preferably, the middle plate is configured as an antistatic plate.

[0013] Preferably, a pushing groove for the pushing plate to pass through is provided inside the magnetic strip plate.

[0014] Preferably, rectangular grooves are provided inside the magnetic strip plate, the middle plate and the suction cup seat.

[0015] Preferably, a mounting cylinder is integrally processed on the top of the pusher plate, and the interior of the mounting cylinder is fixedly mounted to the extended end of the cylinder body.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The magnetic strip of the utility model is adhered to the anti-static plate, and the anti-static plate is screwed to the suction cup seat. When in use, the magnetic strip is used to absorb the lead frame and then transport it to a specified position. When the lead frame needs to be unloaded, the cylinder drives the push plate, and the push plate passes through the magnetic strip to push the lead frame, so that the lead frame falls off the magnetic strip, so that the material of the iron-nickel frame is transported stably during automatic production, and the product qualification rate is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a three-dimensional bottom view of the structure of the utility model;

[0020] Figure 3 It is a three-dimensional diagram of the local structure of the utility model.

[0021] In the figure: 1. Suction cup seat; 2. Cylinder body; 3. Push plate; 4. Mounting screws; 5. Middle plate; 6. Magnetic strip plate; 7. Fixed angle seat; 8. Mounting hole; 9. Push slot; 10. Rectangular slot; 11. Mounting cylinder. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1-3 The utility model provides a technical solution: a lead frame magnetic chuck, comprising:

[0024] Suction cup holder 1;

[0025] and a cylinder body 2 embedded in the suction cup seat 1;

[0026] A pusher plate 3 is fixedly mounted on the bottom extension end of the cylinder body 2;

[0027] The four corners of the bottom of the suction cup seat 1 are all installed with mounting screws 4, the bottoms of the four mounting screws 4 are fixedly installed with an intermediate plate 5, and the bottom of the intermediate plate 5 is pasted with a magnetic strip plate 6.

[0028] A fixed angle seat 7 is fixedly mounted on the top of the suction cup seat 1. One side of the fixed angle seat 7 is fixedly mounted on the surface of the cylinder body 2. A plurality of mounting holes 8 are opened inside the fixed angle seat 7.

[0029] In this embodiment, the magnetic strip is adhered to the anti-static plate, and the anti-static plate is screwed to the suction cup seat 1. When in use, the magnetic strip is used to absorb the lead frame and then transport it to the designated location. When the lead frame needs to be unloaded, the cylinder drives the push plate, which passes through the magnetic strip and pushes the lead frame, causing the lead frame to fall off the magnetic strip. The lead frame magnetic suction cup is an independent component that can be easily connected to the transportation control system of the production machine and can be quickly replaced. It can avoid the common vacuum suction cups and grippers in the industry. In principle, the transportation vacuum degree is low and unstable. The gripper is difficult to grasp due to the thinness of the material, which can easily cause material deformation and other factors that can cause material damage and unstable machine production. The lead frame magnetic suction cup uses magnetism to absorb materials, and the material is absorbed smoothly and stably. It has the effect of making the SOT&SOD series small particles encapsulated in iron-nickel frames stable during automatic production, and significantly improving the product qualification rate.

[0030] The middle plate 5 is set as an anti-static plate;

[0031] Specifically, anti-static plates (insulating materials) are configured to effectively protect materials and devices. The working principle of anti-static plates is based on electrostatic discharge and charge balance. They are usually made of special conductive materials such as conductive polymers, carbon black, or metal. These materials provide a low-impedance path, allowing static electricity to flow quickly and safely to the ground, which is called "grounding." In this way, static electricity is neutralized, thus preventing damage to the equipment.

[0032] A pushing groove 9 for the pushing plate 3 to pass through is provided inside the magnetic strip plate 6;

[0033] Furthermore, the push plate 3 can move freely in the vertical direction in the push groove 9 without contacting the magnetic strip plate 6.

[0034] Rectangular grooves 10 are formed inside the magnetic strip plate 6, the middle plate 5 and the suction cup seat 1;

[0035] It is worth noting that the rectangular groove 10 is provided in the magnetic strip plate 6, the middle plate 5 and the suction cup seat 1, which can facilitate their assembly, assist in installation and save materials.

[0036] The top of the push plate 3 is integrally processed with a mounting cylinder 11, and the interior of the mounting cylinder 11 is fixedly mounted to the extended end of the cylinder body 2;

[0037] Among them, a mounting tube 11 is provided to be connected to the extended end of the cylinder body 2, so as to facilitate the loading and unloading operations of the pusher plate 3 and facilitate replacement.

[0038] The device's magnetic strip is attached to an anti-static plate, which is screwed to a suction cup holder 1. During use, the magnetic strip attracts the lead frame and then transports it to a designated location. When the lead frame needs to be unloaded, a pneumatic cylinder drives a push plate, which pushes the lead frame through the magnetic strip, causing it to fall off the magnetic strip. The lead frame's magnetic suction cup is a separate component that can be easily connected to the production machine's handling control system for quick replacement. The small particles encapsulated in the iron-nickel frame ensure stable handling during automated production, significantly improving product qualification rates.

[0039] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lead frame magnetic chuck, characterized in that: include: Suction cup seat (1); and a cylinder body (2) embedded in the suction cup seat (1); A push plate (3) fixedly mounted on the bottom extension end of the cylinder body (2); The four corners of the bottom of the suction cup seat (1) are all installed with mounting screws (4), the bottoms of the four mounting screws (4) are fixedly installed with an intermediate plate (5), and the bottom of the intermediate plate (5) is pasted with a magnetic strip plate (6).

2. The lead frame magnetic chuck according to claim 1, characterized in that: A fixed angle seat (7) is fixedly mounted on the top of the suction cup seat (1), one side of the fixed angle seat (7) is fixedly mounted on the surface of the cylinder body (2), and a plurality of mounting holes (8) are provided inside the fixed angle seat (7).

3. The lead frame magnetic chuck according to claim 1, characterized in that: The middle plate (5) is configured as an antistatic plate.

4. The lead frame magnetic chuck according to claim 1, wherein: A pushing groove (9) for the pushing plate (3) to pass through is provided inside the magnetic strip plate (6).

5. The lead frame magnetic chuck according to claim 1, characterized in that: Rectangular grooves (10) are provided inside the magnetic strip plate (6), the middle plate (5) and the suction cup seat (1).

6. The lead frame magnetic chuck according to claim 1, characterized in that: The top of the push plate (3) is integrally processed with a mounting cylinder (11), and the interior of the mounting cylinder (11) is fixedly mounted to the extended end of the cylinder body (2).

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