Anti-warping device for material receiving of lead frame

Abstract

The utility model discloses a lead frame material receiving anti-warping device, which comprises a rack, a material receiving channel for the lead frame to enter is formed on the rack, and a conveying assembly for pushing the lead frame to move in the material receiving channel is arranged on the rack; the pressing piece is installed on the rack through a fixing seat, and the pressing piece is located on the side edge in the material receiving channel so as to be pressed on the upper surface of the lead frame; the pressing piece is a rolling wheel, and the rolling wheel is rotationally arranged at the bottom of the fixed seat and can be rolled on the lead frame; the utility model can solve the problems that the lead frame is easy to deform after being welded at high temperature in a vacuum furnace, and is difficult to quickly convey due to the warping phenomenon caused by cooling deformation after being discharged from the furnace.

Description

Technical Field

[0001] The utility model relates to the technical field of lead frame vacuum material collecting devices, in particular to a lead frame material collecting and anti-warping device. Background Art

[0002] As the chip carrier of 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 lead ends of the chip and the external leads to form an electrical circuit. It serves as a bridge to connect to external wires. Lead frames are required in most semiconductor integrated blocks and are an important basic material in the electronic information industry.

[0003] The lead frame is prone to deformation after high-temperature welding in a vacuum furnace, and warping occurs when it cools down after being taken out of the furnace. Abnormal conveying often occurs during the conveying process, causing the product to be stranded on the conveyor line or unable to enter the receiving box, seriously affecting product quality and production progress. Utility Model Content

[0004] In order to overcome the above disadvantages, the purpose of the utility model is to provide a lead frame material collection and anti-warping device.

[0005] In order to achieve the above objectives, the technical solution adopted by the utility model includes:

[0006] A frame, on which a material receiving channel for the lead frame to enter is formed, and the frame is provided with a conveying assembly for pushing the lead frame to move in the material receiving channel;

[0007] A pressing piece is installed on the frame through a fixing seat, and the pressing piece is located at the side edge of the material receiving channel to be pressed on the upper surface of the lead frame.

[0008] In the preferred technical solution of the lead frame material collection and anti-warping device, the pressing member is a rolling wheel, which is rotatably arranged at the bottom of the fixing seat and can roll on the lead frame.

[0009] In the preferred technical solution of the above-mentioned lead frame material collection and anti-warping device, the rolling wheel is movably mounted on the bottom of the fixed seat through a bracket, and a first elastic member is installed between the bracket and the fixed seat. With the help of the elastic force of the first elastic member, the rolling wheel is pushed to a static position to elastically press the lead frame.

[0010] In the preferred technical solution of the lead frame receiving and anti-warping device, the first elastic member is a spring or elastic steel.

[0011] In the preferred technical solution of the above-mentioned lead frame material receiving and anti-warping device, the conveying assembly includes a conveyor belt unit installed on the frame and a propulsion structure installed on the conveyor belt unit; wherein, the propulsion structure is located in the middle of the material receiving channel, and the conveyor belt unit is used to drive the propulsion structure to rotate in a circle to push the lead frame in the material receiving channel.

[0012] In the preferred technical solution of the lead frame receiving and anti-warping device, the pushing structure is a pushing block installed on the conveyor belt unit.

[0013] In the preferred technical solution of the lead frame material collection and anti-warping device, the push block is installed on the conveyor belt unit through a connecting seat, and the push block and the connecting seat are connected by a second elastic member.

[0014] In the preferred technical solution of the lead frame receiving and anti-warping device, a polytetrafluoroethylene coating is sprayed inside the receiving channel.

[0015] In the preferred technical solution of the lead frame material collection and anti-warping device, a rubber cushion layer is installed around the circumference of the rolling wheel.

[0016] The beneficial effect of the present invention is that the present application always presses the rolling wheel against the side of the lead frame through the first elastic member, so that when the lead frame moves, the side of the lead frame is pressed and no warping problem occurs. Moreover, there is rolling friction between the rolling wheel and the side of the lead frame, which can avoid warping of the lead frame while reducing damage to the lead frame, thereby increasing the moving speed of the lead frame 2 and improving the production efficiency of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the front view of the utility model;

[0018] Figure 2 It is a side view of the utility model;

[0019] Figure 3 It is a connection relationship diagram between the pressing piece and the fixing seat;

[0020] Figure 4 It is a schematic diagram of the propulsion structure;

[0021] In the figure: a frame 1, a lead frame 2, a material receiving channel 3, a pressing member 4, a fixing seat 5, a bracket 6, a first elastic member 7, a pushing block 81, a connecting seat 82, and a second elastic member 83. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0023] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "front", "rear" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] like Figures 1 to 4 As shown, the lead frame material receiving and anti-warping device of the present invention comprises: a frame 1, on which a material receiving channel 3 for the lead frame 2 to enter is formed, and the frame 1 is provided with a conveying assembly for pushing the lead frame 2 to move in the material receiving channel 3; a pressing piece 4, the pressing piece 4 is installed on the frame 1 through a fixing seat 5, and the pressing piece 4 is located at the side of the material receiving channel 3 to be pressed on the upper surface of the lead frame 2.

[0026] See also Figure 1 , Figure 2 A roller is rotatably installed in the receiving channel 3, the lead frame 2 can move on the roller, and the conveying component is arranged above the roller. The conveying component can push the lead frame 2 to move toward the pressing piece 4 in the receiving channel 3. When the lead frame 2 is located directly below the pressing piece 4, the pressing piece 4 located at the two inner sides of the receiving channel 3 can limit and press the two side edges of the lead frame 2 in the moving direction. As the conveying component pushes the lead frame 2, the two side edges of the lead frame 2 can be limited before blanking, effectively avoiding the problem that the side edges of the lead frame 2 are warped and affect the blanking of the product and reduce the production efficiency.

[0027] In one or more embodiments, the pressing member 4 is a rolling wheel, which is rotatably arranged at the bottom of the fixing seat 5 and can roll on the lead frame 2; the rolling wheel is movably installed at the bottom of the fixing seat 5 through a bracket 6, and a first elastic member 7 is installed between the bracket 6 and the fixing seat 5. With the help of the elastic force of the first elastic member 7, the rolling wheel is pushed to a static position to elastically press the lead frame 2.

[0028] See also Figure 2 , Figure 3 The fixing seat 5 arranged on the frame 1 extends into the material receiving channel 3, and the rolling wheel installed at the bottom of the fixing seat 5 through the bracket 6 is located directly above the side of the lead frame 2. Under the action of the first elastic member 7, the rolling wheel can always be elastically pressed against the side of the lead frame 2, thereby reducing the damage of the pressing member 4 to the lead frame 2, and the rolling wheel and the lead frame 2 are in rolling friction, which can increase the moving speed of the lead frame 2, avoid the warping problem of the lead frame 2, and improve the production efficiency of the present application.

[0029] In one or more embodiments, the first elastic member 7 is a spring or elastic steel.

[0030] In one or more embodiments, the conveying assembly includes a conveyor belt unit installed on the frame 1 and a propulsion structure installed on the conveyor belt unit; wherein the propulsion structure is located in the middle of the receiving channel 3, and the conveyor belt unit is used to drive the propulsion structure to rotate in a circular manner to push the lead frame 2 in the receiving channel 3.

[0031] The accompanying drawings do not show the conveying unit. Only a set of propulsion structures are shown in the accompanying drawings as an example. The conveyor belt unit includes a conveyor belt, an active conveying roller, a driven conveying roller and a driving motor, wherein the conveyor belt is installed on the active conveying roller and the driven conveying roller, and the conveyor belt is arranged on the active conveying roller and the driven conveying roller in a roughly "mouth" shape.

[0032] See also Figure 1 , Figure 2 There are multiple propulsion structures on the conveyor belt. When the conveyor belt rotates, the propulsion structure can rotate synchronously with the conveyor belt.

[0033] When the lead frame 2 in the receiving channel 3 is pushed, the active conveying roller is controlled to rotate by the driving motor, and the active conveying roller drives the conveyor belt to rotate in a cycle, so that the propulsion structure moves synchronously with the conveyor belt. When the propulsion structure is located directly below the conveyor belt in the horizontal direction, the propulsion structure contacts the lead frame 2, and while the conveyor belt rotates, the propulsion structure can push the lead frame 2 along the receiving channel 3. When the propulsion structure moves to the side of the conveyor belt with the conveyor belt, the propulsion structure rotates and no longer contacts the lead frame 2, thereby realizing the removal of the lead frame 2. The present application can realize the rapid detachment of the lead frame 2 by arranging the conveyor belt to rotate the propulsion structure in a cycle, and at the same time can reduce the number of retreat steps of the propulsion structure, thereby improving the pushing and conveying efficiency of the lead frame 2 by the propulsion structure.

[0034] In one or more embodiments, the propulsion structure is a push block 81 installed on the conveyor belt unit; the push block 81 is installed on the conveyor belt unit through a connecting seat 82, and the push block 81 and the connecting seat 82 are connected by a second elastic member 83.

[0035] See also Figure 2 , Figure 4 The connecting seat 82 is installed on the conveyor belt, the pushing block 81 is installed on the connecting seat 82 at one end away from the conveyor belt, and the second elastic member 83 installed between the pushing block 81 and the connecting seat 82 is a spring.

[0036] When the conveyor belt drives the push block 81 to move against the lead frame 2 , the push block 81 is in elastic contact with the lead frame 2 under the action of the second elastic member 83 , thereby preventing the lead frame 2 from being damaged due to excessive pressing of the push block 81 .

[0037] In one or more embodiments, a polytetrafluoroethylene coating is sprayed in the receiving channel 3. It should be noted that the polytetrafluoroethylene coating has a certain self-lubricating effect, and spraying the polytetrafluoroethylene coating in the receiving channel 3 can facilitate the lead frame 2 to move in the receiving channel 3.

[0038] In one or more embodiments, a rubber cushion is installed around the circumference of the rolling wheel. The rubber cushion is not shown in the drawings; through the above arrangement, the damage of the rolling wheel to the lead frame 2 can be reduced, and the product can be protected.

[0039] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A lead frame material collection and anti-warping device, characterized in that: include: A frame, on which a material receiving channel for the lead frame to enter is formed, and the frame is provided with a conveying assembly for pushing the lead frame to move in the material receiving channel; A pressing piece is installed on the frame through a fixing seat, and the pressing piece is located at the side edge of the material receiving channel to be pressed on the upper surface of the lead frame.

2. The lead frame material collection and anti-warping device according to claim 1, characterized in that: The pressing member is a rolling wheel, which is rotatably arranged at the bottom of the fixing seat and can be rolled on the lead frame.

3. The lead frame material collection and anti-warping device according to claim 2, characterized in that: The rolling wheel is movably mounted on the bottom of the fixing seat through a bracket, and a first elastic member is installed between the bracket and the fixing seat. With the help of the elastic force of the first elastic member, the rolling wheel is pushed to a static position to elastically press the lead frame.

4. The lead frame material collection and anti-warping device according to claim 3, characterized in that: The first elastic member is a spring or elastic steel.

5. The lead frame material collection and anti-warping device according to claim 1, characterized in that: The conveying assembly includes a conveyor belt unit installed on the frame and a propulsion structure installed on the conveyor belt unit; wherein the propulsion structure is located in the middle of the material receiving channel, and the conveyor belt unit is used to drive the propulsion structure to rotate cyclically to push the lead frame in the material receiving channel.

6. The lead frame material collection and anti-warping device according to claim 5, characterized in that: The propulsion structure is a push block installed on the conveyor belt unit.

7. The lead frame material collection and anti-warping device according to claim 6, characterized in that: The push block is installed on the conveyor belt unit through a connecting seat, and the push block and the connecting seat are connected through a second elastic member.

8. The lead frame material collection and anti-warping device according to claim 1, characterized in that: A polytetrafluoroethylene coating is sprayed inside the material receiving channel.

9. The lead frame material collection and anti-warping device according to claim 2, characterized in that: A rubber cushion layer is installed around the circumference of the rolling wheel.

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