Lead frame drying device

Abstract

The utility model belongs to the technical field of lead frame drying, and particularly relates to a lead frame drying device which comprises a bottom frame. A heating frame is mounted above the bottom frame; a heating plate is mounted at the bottom of the heating frame; the top of the bottom frame and the bottom of the heating frame are inclined and are arranged in parallel; a plurality of adjusting mechanisms are mounted in the middle of the bottom frame; a first motor is mounted in the middle of the adjusting mechanism; the output end of the first motor is fixedly connected with a round rod; a pair of grooves are symmetrically formed in the middle of the round rod; through the above structure, when the sheet-shaped lead frame is dried, the sheet-shaped lead frame can be turned over frequently, so that both sides of the sheet-shaped lead frame can be heated and dried effectively, and water residue is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of lead frame drying technology, specifically a lead frame drying device. Background Technology

[0002] Leadframes are a key basic material in semiconductor packaging. As the carrier of integrated circuit chips, they undertake multiple functions such as electrical connection, mechanical support and heat dissipation.

[0003] Leadframe drying is a critical step in semiconductor packaging processes, directly affecting product reliability and yield. Its core objective is to quickly remove moisture from the surface and microstructure of the leadframe by precisely controlling parameters such as temperature, humidity, and airflow, while avoiding oxidation, deformation, or damage. Existing leadframe drying equipment mostly uses a conveyor to carry the leadframe through the heating and drying area, but this is not convenient for flipping the sheet-like leadframe, making it difficult to effectively dry both sides of the leadframe.

[0004] Therefore, this utility model provides a lead frame drying device. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A lead frame drying device of this utility model includes a base frame; a heating frame is installed on the top of the base frame; a heating plate is installed at the bottom of the heating frame; the top of the base frame and the bottom of the heating frame are inclined and parallel; multiple adjustment mechanisms are installed in the middle of the base frame; a first motor is installed in the middle of the adjustment mechanism; a round rod is fixedly connected to the output end of the first motor; a pair of grooves are symmetrically arranged in the middle of the round rod; with the above structure, the sheet lead frame can be frequently flipped when drying the sheet lead frame, so that both sides of the sheet lead frame can be effectively heated and dried, reducing the residual moisture.

[0007] Preferably, a plurality of guide rods are fixedly connected to the top of the base frame; a fixing frame is fixedly connected to the top of the plurality of guide rods; an electric cylinder is fixedly connected to the top of the fixing frame; a connecting plate is fixedly connected to the bottom output end of the electric cylinder; the connecting plate is slidably connected to the middle of the plurality of guide rods; through the above structure, the baking and drying temperature of the lead frame can be adjusted, so that the device can bake and dry lead frames of different materials, thereby improving the applicability of the device.

[0008] Preferably, the base frame has a sliding groove in the middle; the adjustment mechanism includes a mounting bracket and a positioning bolt; the mounting bracket is slidably connected to the middle of the sliding groove; the first motor is fixed to the side wall of the mounting bracket; the positioning bolt is detachably installed in the middle of the mounting bracket; the side wall of the base frame has threaded holes; with the above structure, some of the round rods can be lowered, increasing the distance between adjacent round rods protruding from the top slope of the base frame, thereby reducing the occurrence of the bottom end of the lead frame being difficult to insert into the groove when drying larger lead frames.

[0009] Preferably, the heating frame is slidably connected to the bottom of the connecting plate; a second motor is fixedly connected to the side wall of the connecting plate; a lead screw is fixedly connected to the output end of the second motor; the lead screw is threadedly engaged with the heating frame; through the above structure, the lateral position of the heating frame can be easily adjusted, so that the adjusted heating plate can fully bake and dry the lead frame on the top inclined surface of the base frame.

[0010] Preferably, both the base frame and the heating frame have marking grooves on their side walls; the marking grooves are perpendicular to the inclined edges of the base frame and the heating frame; elastic ropes are fixed to the side walls of the base frame and the heating frame; with the above structure, when adjusting the position of the heating frame and the heating plate, by observing whether the elastic ropes are parallel to the marking grooves, it is easy to determine whether the heating plate is facing the top inclined surface of the base frame, thereby adjusting the heating plate to a suitable position and improving the convenience of adjusting the position of the heating plate.

[0011] Preferably, a connecting rod is fixedly connected to the middle of the mounting frame; multiple bearing rollers are rotatably connected to the top of the connecting rod; through the above structure, the middle of the round rod can be supported, making it difficult for the middle of the round rod to bend, thereby reducing the occurrence of the situation where the bottom of the lead frame is difficult to insert into the groove due to the bending of the round rod.

[0012] Preferably, a limiting plate is slidably connected to the bottom of the chute; through the above structure, a pair of limiting plates are used to support the mounting frame, so that the positioning bolt can be inserted into the middle of the mounting frame and screwed into the threaded hole in the middle of the base frame, thereby improving the ease of use of the device.

[0013] Preferably, the top of the base frame is rotatably connected to a plurality of rollers; the plurality of rollers are evenly distributed on the top of the base frame; with the above structure, when the lead frame slides on the inclined surface of the base frame, the sliding friction between the bottom of the lead frame and the inclined surface of the base frame can be transformed into rolling friction, thereby reducing the wear on the surface of the lead frame.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. The lead frame drying device of this utility model, through the arrangement of a base frame, heating frame, heating plate, first motor, round rod, and groove, can frequently flip the sheet lead frame during the drying process, so that both sides of the sheet lead frame can be effectively heated and dried, reducing the residual moisture.

[0016] 2. The lead frame drying device of this utility model, through the arrangement of guide rod, fixing frame, electric cylinder and connecting plate, can adjust the baking and drying temperature of lead frame, so that the device can bake and dry lead frames of different materials, thereby improving the applicability of the device. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a perspective view of the present invention;

[0019] Figure 2 This is a schematic diagram of the heating plate in this utility model;

[0020] Figure 3 This is a schematic diagram of the base frame structure in this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the round rod in this utility model;

[0022] Figure 5 This is a schematic diagram of the groove structure in this utility model.

[0023] In the diagram: 1. Base frame; 12. Heating frame; 13. Heating plate; 14. First motor; 15. Round rod; 16. Groove; 2. Guide rod; 21. Fixing frame; 22. Electric cylinder; 23. Connecting plate; 3. Slide groove; 31. Mounting frame; 32. Positioning bolt; 4. Second motor; 41. Lead screw; 5. Marking groove; 51. Elastic rope; 6. Connecting rod; 61. Bearing roller; 7. Limiting plate; 8. Roller. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] like Figures 1 to 5As shown, an embodiment of the present invention provides a lead frame drying device, comprising a base frame 1; a heating frame 12 is mounted on top of the base frame 1; a heating plate 13 is mounted on the bottom of the heating frame 12; the top of the base frame 1 and the bottom of the heating frame 12 are inclined and parallel; multiple adjustment mechanisms are mounted in the middle of the base frame 1; a first motor 14 is mounted in the middle of the adjustment mechanisms; a round rod 15 is fixedly connected to the output end of the first motor 14; a pair of grooves 16 are symmetrically arranged in the middle of the round rod 15; during operation, the base frame 1 is installed between a pair of lead frame conveying mechanisms, and the sheet-like lead frame is conveyed from the higher side of the base frame 1 to the higher position of the base frame 1, and then the sheet-like lead frame slides down the inclined surface of the base frame 1. When the bottom end of the lead frame slides to a round rod 15, the lead frame... The bottom end will be inserted into the groove 16, and then the first motor 14 will be started to drive the round rod 15 to rotate. This will cause the lead frame to rotate and flip using the groove 16. After the round rod 15 rotates half a turn, the groove 16 carrying the lead frame will rotate to the top of the second inclined plane. Then the flipped lead frame will slide down again. During the entire process of the lead frame sliding on the base frame 1, it will be flipped multiple times with the cooperation of multiple round rods 15, and the surface will be heated and dried by the heating plate 13. Finally, the dried lead frame will slide down to the conveying mechanism on the lower side of the base frame 1. Through the above structure, the sheet lead frame can be flipped frequently when drying, so that both sides of the sheet lead frame can be effectively heated and dried, reducing the residual moisture.

[0026] like Figures 1 to 2 As shown, multiple guide rods 2 are fixedly connected to the top of the base frame 1; a fixing frame 21 is fixedly connected to the top of the multiple guide rods 2; an electric cylinder 22 is fixedly connected to the top of the fixing frame 21; a connecting plate 23 is fixedly connected to the bottom output end of the electric cylinder 22; the connecting plate 23 is slidably connected to the middle of the multiple guide rods 2; the material properties of the lead frame are the key factors determining the drying temperature. When drying lead frames made of different materials, the operation of the electric cylinder 22 can drive the connecting plate 23 to slide up and down along the middle of the multiple guide rods 2, thereby causing the heating frame 12 to rise or fall. When the heating frame 12 is lowered, the distance between the heating frame 12 and the base frame 1 increases, causing more heat loss when the heating plate 13 reaches the inclined surface on the base frame 1, thereby reducing the baking temperature of the lead frame on the base frame 1. When the heating frame 12 is lowered, the distance between the heating frame 12 and the base frame 1 decreases, reducing the heat loss of the heating plate 13 and increasing the baking temperature of the lead frame on the base frame 1. Through the above structure, the baking and drying temperature of the lead frame can be adjusted, enabling the device to bake and dry lead frames of different materials, thus improving the applicability of the device.

[0027] like Figures 1 to 4As shown, a groove 3 is provided in the middle of the base frame 1; the adjustment mechanism includes a mounting bracket 31 and a positioning bolt 32; the mounting bracket 31 is slidably connected to the middle of the groove 3; the first motor 14 is fixed to the side wall of the mounting bracket 31; the positioning bolt 32 is detachably installed in the middle of the mounting bracket 31; the side wall of the base frame 1 has threaded holes; during operation, after multiple mounting brackets 31 are installed in the middle of the base frame 1, the spacing between multiple grooves 3 is fixed. When the length of the lead frame that needs to be dried is greater than the distance between a pair of round rods 15, the bottom of the lead frame may be difficult to insert into the groove 16. At this time, the positioning bolt 32 in the middle of part of the mounting bracket 31 can be removed so that the positioning bolt 32 is no longer inserted into the threaded hole in the middle of the base frame 1. The mounting bracket 31 is lowered, causing the corresponding round rod 15 to fall below the top slope of the base frame 1. This prevents the round rod 15 from obstructing the downward movement of the lead frame. When drying smaller lead frames, the mounting bracket 31 is slid up again, causing the round rod 15 to protrude from the slope of the base frame 1. The positioning bolt 32 is then passed through the middle of the mounting bracket 31 and screwed into the threaded hole on the side wall of the base frame 1 to fix the position of the mounting bracket 31. Through the above structure, the round rod 15 can be lowered, increasing the distance between adjacent round rods 15 protruding from the top slope of the base frame 1. This reduces the likelihood of the bottom end of the lead frame being difficult to insert into the groove 16 when drying larger lead frames.

[0028] like Figures 1 to 2 As shown, the heating frame 12 is slidably connected to the bottom of the connecting plate 23; a second motor 4 is fixedly connected to the side wall of the connecting plate 23; a lead screw 41 is fixedly connected to the output end of the second motor 4; the lead screw 41 and the heating frame 12 are threadedly engaged; during operation, when drying the lead frame, the lead frame will slide down the top slope of the base frame 1, and at the same time, the heat generated by the heating plate 13 will bake the surface of the lead frame. If the heating frame 12 only rises vertically with the connecting plate 23 so that the heating plate 13 is directly above the top slope of the base frame 1, some heat radiation generated at the higher end of the heating plate 13 is easily directed towards the top of the base frame 1. The heat radiation is diffused, and the lower part of the top of the base frame 1 receives less heat radiation, resulting in reduced heat utilization and uneven baking. At this time, the second motor 4 can be started to drive the lead screw 41 to rotate, thereby moving the heating rack 12 under the connecting plate 23. The heating rack 12 is moved to the corresponding position, so that the heating plate 13 can fully and evenly bake the lead frame on the top slope of the base frame 1. Through the above structure, the lateral position of the heating rack 12 can be easily adjusted, so that the adjusted heating plate 13 can fully bake and dry the lead frame on the top slope of the base frame 1.

[0029] like Figures 1 to 4As shown, both the base frame 1 and the heating frame 12 have marking grooves 5 on their side walls. The marking grooves 5 are set perpendicular to the inclined edges of the base frame 1 and the heating frame 12. Elastic ropes 51 are fixed to the side walls of the base frame 1 and the heating frame 12. During operation, when the positions of the heating frame 12 and the heating plate 13 are adjusted, the elastic ropes 51 will extend and retract synchronously. By observing whether the elastic ropes 51 are parallel to the marking grooves 5, it is easy to determine whether the heating plate 13 is facing the top inclined surface of the base frame 1. When the elastic ropes 51 and the marking grooves 5 are relatively parallel, the projection of the heating plate 13 on the inclined surface of the base frame 1 will not easily exceed the range of the inclined surface of the base frame 1. Thus, the heat generated by the heating plate 13 will fully bake and dry the lead frame on the inclined surface of the base frame 1, improving the convenience of adjusting the position of the heating plate 13.

[0030] like Figures 1 to 5 As shown, a connecting rod 6 is fixedly connected to the middle of the mounting bracket 31; multiple bearing rollers 61 are rotatably connected to the top of the connecting rod 6; during operation, the middle of the round rod 15 may bend and drop slightly, and this bending will make it difficult for the bottom of the lead frame to be inserted into the groove 16. By setting the connecting rod 6 and the bearing rollers 61, the bearing rollers 61 can support the middle of the round rod 15, making it difficult for the middle of the round rod 15 to bend, thereby reducing the occurrence of the situation where the bottom of the lead frame is difficult to be inserted into the groove 16 due to the bending of the round rod 15.

[0031] like Figure 4 As shown, the bottom of the slide groove 3 is slidably connected to the limiting plate 7; during operation, when the mounting frame 31 is slid up and the round rod 15 protrudes from the inclined surface of the base frame 1, the limiting plate 7 can be slid to move the limiting plate 7 below the mounting frame 31, thereby using a pair of limiting plates 7 to support the mounting frame 31, so that the positioning bolt 32 can be inserted into the middle of the mounting frame 31 and screwed into the threaded hole in the middle of the base frame 1, thus improving the ease of use of the device.

[0032] like Figure 5 As shown, multiple rollers 8 are rotatably connected to the top of the base frame 1; the multiple rollers 8 are evenly distributed on the top of the base frame 1; through the above structure, when the lead frame slides on the inclined surface of the base frame 1, the sliding friction between the bottom of the lead frame and the inclined surface of the base frame 1 can be transformed into rolling friction, thereby reducing the wear on the surface of the lead frame.

[0033] During operation, the base frame 1 is installed between a pair of lead wire frame conveying mechanisms. The sheet-shaped lead wire frame is conveyed from the higher side of the base frame 1 to the higher position of the base frame 1. Then, the sheet-shaped lead wire frame slides down the inclined surface of the base frame 1. When the bottom end of the lead wire frame slides to a round rod 15, the bottom end of the lead wire frame will smoothly insert into the groove 16. Then, the first motor 14 is started to drive the round rod 15 to rotate, thereby using the groove 16 to drive the lead wire frame to rotate and flip. After the round rod 15 rotates half a turn, the groove 16 carrying the lead wire frame will rotate to the top of the second inclined surface. Then, the flipped lead wire frame will slide down again. During the entire process of the lead wire frame sliding on the base frame 1, it will be flipped multiple times with the cooperation of multiple round rods 15 and heated by the heating plate 1. 3. The surface is heated and dried. The dried lead frame then slides onto the conveyor mechanism on the lower side of the base frame 1. The material properties of the lead frame are a key factor determining the drying temperature. For lead frames made of different materials, the operation of the electric cylinder 22 drives the connecting plate 23 to slide up and down along the middle of multiple guide rods 2, thereby raising or lowering the heating frame 12. When the heating frame 12 rises, the distance between the heating frame 12 and the base frame 1 increases, causing more heat loss when the heat plate 13 reaches the inclined surface on the base frame 1, thus reducing the baking temperature of the lead frame on the base frame 1. Conversely, when the heating frame 12 falls, the distance between the heating frame 12 and the base frame 1 decreases, reducing heat loss from the heating plate 13. To reduce the baking temperature of the lead frame on the base frame 1, multiple mounting brackets 31 are installed in the middle of the base frame 1, and the spacing between multiple sliding grooves 3 is fixed. When the length of the lead frame to be dried is greater than the distance between a pair of round rods 15, the bottom of the lead frame may be difficult to insert into the groove 16. At this time, the positioning bolts 32 in the middle of part of the mounting bracket 31 can be removed, so that the positioning bolts 32 are no longer inserted into the threaded holes in the middle of the base frame 1, so that this part of the mounting bracket 31 is lowered, thereby lowering the corresponding part of the round rods 15 to a position below the top slope of the base frame 1, so that this part of the round rods 15 no longer obstructs the downward movement of the lead frame. When drying a smaller length of lead frame, the mounting bracket 31 is slid up again to allow the round rods 15 to slide down. The mounting bracket 31 protrudes from the inclined surface of the base frame 1, and the positioning bolt 32 passes through the middle of the mounting bracket 31 and is screwed into the threaded hole on the side wall of the base frame 1 to fix the position of the mounting bracket 31. When the lead frame is dried, the lead frame will slide down the top inclined surface of the base frame 1. At the same time, the heat generated by the heating plate 13 will bake the surface of the lead frame. If the heating bracket 12 only rises longitudinally with the connecting plate 23 so that the heating plate 13 is directly above the top inclined surface of the base frame 1, some heat radiation generated by the higher end of the heating plate 13 is easy to diffuse towards the position higher than the top of the base frame 1, while the lower end of the top of the base frame 1 receives less heat radiation, resulting in a decrease in heat utilization and uneven baking. At this time, the second motor 4 can be started to drive the lead screw 41 to rotate.This allows the heating rack 12 to move below the connecting plate 23, positioning it in the appropriate location so that the heating plate 13 can fully and evenly heat the lead frame on the top slope of the base frame 1. When adjusting the positions of the heating rack 12 and the heating plate 13, the elastic cord 51 will extend and retract synchronously. By observing whether the elastic cord 51 is parallel to the marking groove 5, it is easy to determine whether the heating plate 13 is directly facing the top slope of the base frame 1. When the elastic cord 51 and the marking groove 5 are relatively parallel, the projection of the heating plate 13 on the slope of the base frame 1 will not easily exceed the range of the slope, thus ensuring that the heat generated by the heating plate 13 fully heats the base frame. During the baking and drying process of the lead frame on the inclined surface of frame 1, the middle part of the round rod 15 may slightly bend and drop. This bending makes it difficult for the bottom of the lead frame to be inserted into the groove 16. The connecting rod 6 and the bearing roller 61 provide support for the middle part of the round rod 15, preventing bending. When the mounting frame 31 is slid upwards and the round rod 15 protrudes from the inclined surface of the base frame 1, the limiting plate 7 can be slid and moved below the mounting frame 31. This provides support for the mounting frame 31 using a pair of limiting plates 7, facilitating the subsequent insertion of the positioning bolt 32 into the middle of the mounting frame 31 and screwing it into the threaded hole in the middle of the base frame 1.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A lead frame drying device, comprising a base frame (1); characterized in that: A heating frame (12) is installed above the base frame (1); a heating plate (13) is installed at the bottom of the heating frame (12); the top of the base frame (1) and the bottom of the heating frame (12) are inclined and parallel; a plurality of adjustment mechanisms are installed in the middle of the base frame (1); a first motor (14) is installed in the middle of the adjustment mechanism; a round rod (15) is fixedly connected to the output end of the first motor (14); a pair of grooves (16) are symmetrically arranged in the middle of the round rod (15).

2. The lead frame drying device according to claim 1, characterized in that: The top of the base frame (1) is fixed with a plurality of guide rods (2); the top of the plurality of guide rods (2) is fixed with a fixing frame (21); the top of the fixing frame (21) is fixed with an electric cylinder (22); the bottom output end of the electric cylinder (22) is fixed with a connecting plate (23); the connecting plate (23) is slidably connected to the middle of the plurality of guide rods (2).

3. The lead frame drying device according to claim 1, characterized in that: The base frame (1) has a sliding groove (3) in the middle; the adjustment mechanism includes a mounting frame (31) and a positioning bolt (32); the mounting frame (31) is slidably connected to the middle of the sliding groove (3); the first motor (14) is fixed to the side wall of the mounting frame (31); the positioning bolt (32) is detachably installed in the middle of the mounting frame (31); the side wall of the base frame (1) has threaded holes.

4. The lead frame drying device according to claim 2, characterized in that: The heating frame (12) is slidably connected to the bottom of the connecting plate (23); a second motor (4) is fixedly connected to the side wall of the connecting plate (23); a lead screw (41) is fixedly connected to the output end of the second motor (4); the lead screw (41) and the heating frame (12) are threaded together.

5. The lead frame drying device according to claim 1, characterized in that: The side walls of the base frame (1) and the heating frame (12) are provided with marking grooves (5); the marking grooves (5) are set perpendicular to the inclined edges of the base frame (1) and the heating frame (12); elastic ropes (51) are fixed to the side walls of the base frame (1) and the heating frame (12).

6. A lead frame drying device according to claim 3, characterized in that: A connecting rod (6) is fixedly connected to the middle of the mounting frame (31); a plurality of bearing rollers (61) are rotatably connected to the top of the connecting rod (6).

7. A lead frame drying device according to claim 3, characterized in that: The bottom of the chute (3) is slidably connected to a limiting plate (7).

8. The lead frame drying device according to claim 1, characterized in that: The top of the base frame (1) is rotatably connected to a plurality of rollers (8); the plurality of rollers (8) are evenly distributed on the top of the base frame (1).

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