A mold for a lead frame with a multi-angle bending structure

Abstract

This utility model provides a mold for a lead frame with a multi-angle bending structure, belonging to the technical field of lead frame molds. It includes a lower mold frame and an upper mold plate, with the lower mold frame located below the upper mold plate. A lead frame forming cavity is formed at the top of the lower mold frame. A stamping block is located at the bottom of the upper mold plate. Through slots are respectively formed at the bottom of the lead frame forming cavity, the bottom of the stamping block, and the top of the upper mold plate. An electric push rod is fixed to the bottom of the lower mold frame by bolts. A lead frame contact bending assembly is fixed to the output end of the electric push rod. This utility model, through the use of an arc transition plate and a support platform at the hinge of the bending table and the bending adjustment plate after angle adjustment, and by designing arc transition plates of different bending specifications and supporting them with the support platform, can stamp and form lead frame contacts of the required bending shape using the combined structure, without needing to replace the entire mold, resulting in low cost.

Description

Technical Field

[0001] This utility model belongs to the field of lead frame mold technology, specifically relating to a mold for a lead frame with a multi-angle bending structure. Background Technology

[0002] As a chip carrier for integrated circuits, the lead frame is a key structural component that uses bonding materials to achieve electrical connection between the internal circuit leads of the chip and the external leads, forming an electrical circuit. The contacts on the lead frame need to be stamped using molds.

[0003] Most existing lead frame molds can only form contacts with one bending angle. When it is necessary to form contacts with different bending shapes, the entire mold needs to be replaced, which is costly.

[0004] Therefore, a mold for a lead frame with a multi-angle bending structure is proposed. Summary of the Invention

[0005] This invention provides a mold for a lead frame with a multi-angle bending structure, the purpose of which is to solve the problems mentioned above.

[0006] This utility model provides a mold for a lead frame with a multi-angle bending structure, including a lower mold frame and an upper mold plate, wherein the lower mold frame is located below the upper mold plate; a lead frame forming cavity is formed at the top of the lower mold frame; a stamping block is provided at the bottom of the upper mold plate; through slots are respectively formed at the bottom of the lead frame forming cavity, the bottom of the stamping block, and the top of the upper mold plate; an electric push rod is fixed to the bottom of the lower mold frame by bolts; and a lead frame contact foot bending assembly is fixed to the output end of the electric push rod; the lead frame contact foot bending assembly includes: a bending table fixed to the output end of the electric push rod; and a bending table provided at the top of the bending table. The bending arc transition unit comprises: a bending support unit disposed on one side of the outer wall of the bending table; and a bending adjustment plate hinged to one side of the outer wall of the bending table; wherein the bending arc transition unit comprises: a mating plate fixed to the outer wall of the bending table and the bending adjustment plate; an arc transition plate disposed on the outer wall of the mating plate; and an arc portion disposed at the bending point of the arc transition plate; wherein the bending support unit comprises: a support platform disposed on one side of the outer wall of the bending table near the lower part of the bending adjustment plate; an inclined surface opened at the top of the support platform; a replacement cover disposed at the top of the upper template; and a bending cavity opened at the bottom of the replacement cover.

[0007] Furthermore, the top of both the bending table and the bending adjustment plate is provided with a slot, and the bottom of the arc transition plate is provided with a strip. The slot and the strip slide together, and the cross-section of both the slot and the strip is T-shaped. By using the cooperation of the slot and the strip, the arc transition plate can be inserted into the hinge of the bending table and the bending adjustment plate.

[0008] Furthermore, four guide pillars are symmetrically arranged on the top of the lower mold frame, and guide holes are provided on the top of the upper mold plate for the guide pillars to pass through.

[0009] By adopting the above technical solution, the movement trajectory of the upper template can be guided, thereby ensuring that the upper template fits precisely against the lower template.

[0010] Furthermore, the support platform and the bending platform are slidably connected and fastened with screws;

[0011] By adopting the above technical solution, the sliding connection ensures that the support platform is accurately positioned and inserted into the bending platform.

[0012] Furthermore, the bottom and inclined surface of the bending adjustment plate are precisely matched and fitted together;

[0013] By adopting the above technical solution, the inclined surface can effectively and stably support the bending adjustment plate, ensuring the stability and firmness of the bending adjustment plate after the angle is adjusted.

[0014] Furthermore, the top of the inner cavity of the bending cavity matches the top of the bending table and the arc transition plate.

[0015] By adopting the above technical solution, the workpiece can be stamped and formed into the required shape of the contacts on the lead frame.

[0016] Furthermore, the lead frame forming cavity, the stamping block, and the through groove on the upper template are all on the same vertical axis;

[0017] By adopting the above technical solution, the through slots are connected, thereby enabling the bending and forming of the contacts on the lead frame.

[0018] The beneficial effects of this utility model are as follows:

[0019] This invention utilizes an arc transition plate and a support platform at the hinge of the bending table and bending adjustment plate after angle adjustment. By designing arc transition plates with different bending specifications and supporting them with the support platform, the combined structure can stamp and form the lead frame contacts of the required bending shape. By using arc transition plates of different specifications, the contacts on the lead frame can be bent to different angles, thus adapting to the forming of lead frames with more requirements. There is no need to replace the entire mold; only the matching arc transition plate needs to be replaced, resulting in low cost.

[0020] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0023] Figure 2 This is a schematic diagram of the upper template structure according to an embodiment of the present utility model;

[0024] Figure 3 This is a top view of the lower mold frame according to an embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the lower mold frame structure according to an embodiment of the present utility model;

[0026] Figure 5 This is a schematic diagram of the lead frame contactor bending assembly structure according to an embodiment of the present utility model;

[0027] Figure 6 This is an exploded view of the lead frame contact bending assembly according to an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the bent arc transition unit structure according to an embodiment of the present utility model;

[0029] Reference numerals: 1. Lower mold frame; 2. Upper mold plate; 3. Lead wire frame forming cavity; 4. Stamping block; 5. Through slot; 6. Electric push rod; 7. Lead wire frame contact foot bending assembly; 71. Bending table; 711. Bending adjustment plate; 712. Slot; 72. Bending arc transition unit; 721. Arc transition plate; 722. Locking strip; 723. Butt plate; 724. Arc part; 73. Bending support unit; 731. Support platform; 732. Inclined surface; 8. Replacement cover; 9. Bending cavity; 10. Guide column. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0031] Reference Figure 1-7 This utility model embodiment proposes a mold for a lead frame with a multi-angle bending structure, including a lower mold frame 1 and an upper mold plate 2. The lower mold frame 1 is located below the upper mold plate 2, and a lead frame forming cavity 3 is provided at the top center of the lower mold frame 1. A stamping block 4 matching the lead frame forming cavity 3 is provided at the bottom center of the upper mold plate 2. The stamping block 4 is used to stamp the workpiece inside the lead frame forming cavity 3 to realize the forming of the lead frame.

[0032] The bottom of the lead frame forming cavity 3, the top of the upper template 2, and the top of the stamping block 4 are all provided with through slots 5. The lead frame forming cavity 3, the stamping block 4, and the through slots 5 on the upper template 2 are on the same vertical axis to ensure that the through slots 5 are connected, thereby realizing the bending and forming of the contact feet on the lead frame. An electric push rod 6 is fixedly connected to the bottom of the lower mold frame 1 near the position directly below the through slot 5 by bolts. The electric push rod 6 is fixedly connected to the bending table 71 in the lead frame contact foot bending assembly 7 through its output end on one side. A bending adjustment plate 711 is hinged to the outer wall of one side of the bending table 71. The top of the bending adjustment plate 711 and the bending table 71 are both provided with slots 712.

[0033] A connecting plate 723 in the bending arc transition unit 72 is fixedly connected to one side of the bending table 71 by screws. An arc transition plate 721 is integrally formed on the top of the connecting plate 723. The arc transition plate 721 is provided with multiple specifications. By installing arc transition plates 721 of different specifications, the contacts on the lead frame can be bent to different angles, thereby adapting to the forming of lead frames with more requirements. A retaining strip 722 is provided at the bottom of the arc transition plate 721. The retaining groove 712 and the retaining strip 722 slide and cooperate with each other. The cross-section of the retaining groove 712 and the retaining strip 722 is T-shaped. By cooperating with the retaining groove 712 and the retaining strip 722, the arc transition plate 721 can be inserted into the hinge of the bending table 71 and the bending adjustment plate 711. The bending part of the arc transition plate 721 is provided with an arc part 724. The arc part 724 can ensure that the bending part of the contacts on the lead frame is smooth and reduce the generation of sharp corners.

[0034] A support platform 731 from the bending support unit 73 is fixedly connected to one side of the outer wall of the bending table 71 near the lower part of the bending adjustment plate 711 by screws. The support platform 731 and the bending table 71 slide against each other. The sliding connection ensures that the support platform 731 is accurately positioned and inserted into the bending table 71. The top of the support platform 731 is provided with an inclined surface 732. The bottom of the bending adjustment plate 711 is precisely matched and fitted with the inclined surface 732. The inclined surface 732 can effectively and stably support the bending adjustment plate 711, ensuring the stability and firmness of the bending adjustment plate 711 after the angle is adjusted.

[0035] A replacement cover 8 is bolted to the top of the upper template 2 near the top of the through slot 5. A bending cavity 9 is opened at the bottom of the replacement cover 8. The top of the inside of the bending cavity 9 fits with the top of the bending table 71 and the arc transition plate 721, which can stamp and form the workpiece, thereby forming the required shape of the contact foot on the lead frame. Four guide pillars 10 are symmetrically arranged on the top of the lower mold frame 1 near the outside of the lead frame forming cavity 3. A guide hole is opened on the top of the upper template 2 for the guide pillars 10 to pass through, which can guide the movement trajectory of the upper template 2, thereby ensuring that the upper template 2 fits the lower mold frame 1 precisely.

[0036] The specific implementation method is as follows: When forming the lead frame contact, the workpiece is placed on top of the lower mold 1. Under the guidance of the guide post 10, the upper mold 2 moves downward under the action of external driving force. The stamping block 4 at the bottom of the upper mold 2 contacts the workpiece, and the stamping block 4 extrudes and forms the workpiece in the lead frame forming cavity 3. After the lead frame is initially stamped and formed, the electric push rod 6 is controlled to drive the lead frame contact bending assembly 7 upward through its output end on one side. The bending table 71 and the arc transition plate 721 move upward synchronously. The bending table 71 and the arc transition plate 721 contact the workpiece, and with the cooperation of the bending cavity 9, the contact on the lead frame is formed. To form contacts with different bending angles, the lead frame contact bending assembly 7 is removed from the electric push rod 6. Then, the bending arc transition unit 72 and the bending support unit 73 are removed. The bending adjustment plate 711 is rotated on the bending table 71 and its hinge is made to the required bending angle. Then, the matching arc transition plate 721 is inserted into the hinge. The support table 731 is inserted under the bending adjustment plate 711 and the arc transition plate 721 and the support table 731 are locked. The bending shape of the lead frame contact is adjusted. Finally, the lead frame contact bending assembly 7 is installed at the output end of the electric push rod 6 to realize the subsequent bending and forming of the lead frame contact.

[0037] 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 claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A mold for a lead frame with a multi-angle bending structure, characterized in that: It includes a lower mold frame and an upper mold template, wherein the lower mold frame is located below the upper mold template; A lead frame forming cavity is formed at the top of the lower mold frame; A stamping block located at the bottom of the upper template; Through slots are respectively opened at the bottom of the lead frame forming cavity, the bottom of the stamping block, and the top of the upper template; An electric push rod is fixed to the bottom of the lower mold frame by bolts; A lead frame contact foot bending assembly fixed to the output end of the electric actuator; The lead frame contact bending assembly includes: A bending table fixed to the output end of the electric push rod; A bending arc transition unit located at the top of the bending table; and A bending support unit is provided on the outer wall of one side of the bending table; A bending adjustment plate hinged to one side of the outer wall of the bending table; The bent arc transition unit includes: A mating plate fixed to the outer wall of the bending table and the bending adjustment plate; An arc transition plate is provided on the outer wall of the mating plate; The arc portion is located at the bend of the arc transition plate; The bending support unit includes: A support platform is provided on one side of the outer wall of the bending table, near the lower part of the bending adjustment plate; An inclined surface formed at the top of the support platform; Replacement cover located on top of the upper template; A bending cavity is formed at the bottom of the replacement cover.

2. The mold for a lead frame having a multi-angle bending structure according to claim 1, wherein: The top of both the bending table and the bending adjustment plate is provided with a slot, and the bottom of the arc transition plate is provided with a strip. The slot and the strip slide together, and the cross-section of both the slot and the strip is T-shaped.

3. The lead frame mold with multi-angle bending structure according to claim 1, characterized in that: The lower mold frame has four guide pillars symmetrically arranged on its top, and the upper mold plate has guide holes on its top for the guide pillars to pass through.

4. The lead frame mold with multi-angle bending structure according to claim 1, characterized in that: The support platform and the bending platform are slidably connected and fastened with screws.

5. The lead frame mold with multi-angle bending structure according to claim 1, characterized in that: The bottom and inclined surface of the bending adjustment plate are precisely matched and fitted.

6. The mold for a lead frame having a multi-angle bending structure according to claim 1, wherein: The top of the inner cavity of the bending cavity matches the top of the bending table and the arc transition plate.

7. The lead frame mold with multi-angle bending structure according to claim 1, characterized in that: The lead frame forming cavity, the stamping block, and the through slot on the upper template are all on the same vertical axis.

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