Split type mold structure suitable for single-side forming of lead frame

Abstract

The utility model discloses a split type mould structure suitable for unilateral forming of a lead frame, and relates to the technical field of moulds, the split type mould structure comprises a bottom plate, an insert I, an insert II, an insert III and an insert IV, the top end of the bottom plate is movably connected with a main body, the main body is provided with an insert groove I, an insert groove II and an insert groove III, and the insert I, the insert II, the insert III and the insert IV are arranged on the bottom plate. The second inlaying groove is communicated with the third inlaying groove, and the width of the third inlaying groove is larger than that of the second inlaying groove. Through the arrangement of the limiting assembly, separation of the insert in the upward moving process of the main body is avoided, the insert can be replaced or maintained through separation of the insertion rod and the insertion hole, replacement of the whole die is not needed, a single pressing unit can be adjusted, the flexibility of the lower die is improved, and the situation that when the lower die is an integral body, the pressing efficiency is high is avoided. After the upper die is punched, the quality of a finished product is damaged, meanwhile, the stability of the insert is improved, the insert can be kept in a fixed state in the using process of the die, and the pressing quality of the die is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mould technical field, concretely is a split type mould structure suitable for single side forming of lead frame. BACKGROUND

[0002] Lead frame as the core component of semiconductor discrete device, bears the heavy responsibility of connecting internal circuit and external lead of chip, is the important component of electric circuit structure, along with the continuous development of semiconductor technology, the manufacturing process of lead frame is also constantly improving and perfecting, to satisfy the increasing product performance and reliability requirement, the manufacturing flow of lead frame usually includes stamping, electroplating, post DC (forming cutting), inspection and packaging shipment etc. Link, wherein the forming cutting process of post DC link is particularly crucial, it determines the final shape and dimensional accuracy of lead frame.

[0003] However, the traditional lead frame forming cutting die has some drawbacks, which leads to the difficulty of further improving the production efficiency and product quality, the traditional integral type mould cannot adjust each PAD independently, leading to the inconsistent of PAD inclination and beating seat depth, affecting product precision, in order to ensure the coplanarity of multiple PADs in the same lead frame, the traditional mould usually adopts the way of pressing weight, however, this way is easy to cause the PAD surface to be black and smooth, which affects the subsequent welding quality, therefore, a split type mould structure suitable for single side forming of lead frame is needed to solve the existing problems. UTILITY MODEL CONTENTS

[0004] The utility model discloses a split type mould structure suitable for single side forming of lead frame, the replacement or maintenance of insert can be carried out through the limiting component, the whole mould does not need to be replaced, the single pressing unit can be adjusted, the flexibility of lower mould is improved, the main body is convenient to replace through the connecting component, and the use wear condition of insert is observed, and the replacement or recovery operation is carried out.

[0005] To achieve the above object, the utility model provides the following technical scheme: A split type mould structure suitable for single side forming of lead frame, including bottom plate, insert piece no. One, insert piece no. Two, insert piece no. Three and insert piece no. Four, the top of bottom plate swing joint has a main body, the main body is provided with insert groove no. One, insert groove no. Two and insert groove no. Three, and insert groove no. Two is communicated with insert groove no. Three, the width of insert groove no. Three is greater than the width of insert groove no. Two, the bottom of main body is provided with limit groove, and insert groove no. One, insert groove no. Two and insert groove no. Three are all communicated with limit groove, insert piece no. One swing and the inside of insert groove no. One are matched, insert piece no. Two and insert piece no. Three are matched with insert groove no. Two, and insert piece no. Four is matched with insert groove no. Three, the top of bottom plate swing joint has a limit component, and limit component is swing connected with insert piece no. One, insert piece no. Two and insert piece no. Three respectively, limit component is fixedly connected with connecting component, and connecting component is swing connected with main body, the top of main body is structured with forming groove (16), and the top of insert groove no. One, the top of insert groove no. Two and the top of insert groove no. Three are communicated with forming groove, and the side of forming groove is structured with notch inclined surface.

[0006] The utility model further sets up, insert piece no. One, insert piece no. Two, insert piece no. Three and insert piece no. Four all are L shape, and the bottom of insert piece no. One, the bottom of insert piece no. Two, the bottom of insert piece no. Three and the bottom of insert piece no. Four all are swing connected with limit groove, the top of bottom plate is fixedly connected with a plurality of positioning column, the bottom of insert piece no. One, the bottom of insert piece no. Two, the bottom of insert piece no. Three and the bottom of insert piece no. Four all are provided with positioning hole, and positioning column is matched with positioning hole respectively.

[0007] The utility model further sets up, limit component includes connecting plate, moving plate, plug rod and adjusting rod, moving plate is fixedly connected in the bottom of connecting plate, the quantity of plug rod is three, and plug rod is fixedly connected on one side of moving plate, the outside of adjusting rod is provided with screw threads, adjusting rod penetrates moving plate, and adjusting rod is connected with moving plate screw.

[0008] The utility model further sets up, the bottom of insert piece no. One, the bottom of insert piece no. Two and the bottom of insert piece no. Three all are provided with plug hole, and the front end of plug rod is matched with plug hole respectively.

[0009] The utility model further sets up, the top of bottom plate is provided with moving groove, and moving plate swing connection is in the inside of moving groove, and adjusting rod swing connection is in the inside of bottom plate, plug rod and moving plate all swing connection are in the inside of limit groove.

[0010] The utility model further sets up, connecting component includes installation cylinder, return spring and limit rod, installation cylinder is fixedly connected on one side of connecting plate, the inside of installation cylinder is fixedly connected with return spring, and the other end of return spring is fixedly connected with limit rod.

[0011] The utility model further sets up, the bottom of main part is provided with limit hole, and limit hole is linked together with limit groove, the front end structure of limit rod has bevel, and limit rod is matched with limit hole.

[0012] The utility model further sets up, the inside screw thread connection of main part has push rod, the front end of push rod extends to the inside of limit hole, and the front end of push rod is in contact with the front end of limit rod.

[0013] Compared with the prior art, the split type mold structure suitable for single side forming of the lead frame has the following beneficial effects:

[0014] 1、 the limiting component set up, avoid the process that main part moves upward causes the separation of insert, and through the separation of plug rod and insertion hole, the replacement or maintenance of insert can be carried out, the whole mold does not need to be replaced, the single pressing unit can be adjusted, the flexibility of lower mold is improved, when the lower mold is integral, the quality of finished product is damaged after the upper mold is stamped, the stability of insert is improved, the insert can keep fixed state during mold use, the quality of mold pressing is improved.

[0015] 2、 the connecting assembly set up, if the main body and the bottom plate need to be separated, but do not cause the movement of insert, then the push rod can be rotated forward, the limit rod is pushed out of the inside of limit hole, the limit rod is retracted to the inside of installation cylinder, the compression of return spring is shortened, the connection between the bottom plate and the main body is contacted at this time, the main body and the bottom plate can be separated, and the insert is affected, so that the main body is replaced conveniently, and the use wear condition of insert is observed, and replacement or recovery operation is carried out. DRAWINGS

[0016] Figure 1 It is the three-dimensional structure schematic view of the utility model;

[0017] Figure 2 It is the section structure schematic view of the utility model;

[0018] Figure 3 It is the insert and main body structure schematic view of the utility model;

[0019] Figure 4 It is another view structure schematic view of the insert and main body of the utility model;

[0020] Figure 5 It is the insert and bottom plate structure schematic view of the utility model;

[0021] Figure 6 It is the push rod and connecting assembly structure schematic view of the utility model.

[0022] In the diagram: 1. Base plate; 2. Insert 1; 3. Insert 2; 4. Insert 3; 5. Insert 4; 6. Main body; 7. Limiting groove; 8. Limiting component; 801. Connecting plate; 802. Moving plate; 803. Insert rod; 804. Adjusting rod; 9. Connecting component; 901. Mounting cylinder; 902. Return spring; 903. Limiting rod; 10. Positioning post; 11. Positioning hole; 12. Insertion hole; 13. Moving groove; 14. Limiting hole; 15. Push rod; 16. Forming groove; 17. Notch bevel. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] like Figures 1-6 As shown, this utility model provides a technical solution: a split mold structure suitable for single-sided forming of conductor frames, including a base plate 1, insert 1 2, insert 2 3, insert 3 4, and insert 4 5. A main body 6 is movably connected to the top of the base plate 1. Insert 6 has insert grooves 1, 2, and 3, with groove 2 and groove 3 connected. The width of groove 3 is greater than the width of groove 2. Inserts 1 2, 2 3, and 3 4 have identical structures. Insert 4 5 is structurally larger than the other three inserts, making it easier to connect with the insert. The bottom of the main body 6 is provided with a limiting groove 7, and the first, second, and third inserts are all connected to the limiting groove 7. The first insert 2 is movably adapted to the inside of the first insert, the second insert 3 and the third insert 4 are adapted to the second insert, and the fourth insert 5 is adapted to the third insert. The top of the base plate 1 is movably connected to a limiting component 8, and the limiting component 8 is movably connected to the first insert 2, the second insert 3, and the third insert 4, respectively. A connecting component 9 is fixedly connected to the limiting component 8, and the connecting component 9 is movably connected to the main body 6. The first insert 2, the second insert 3, and the third insert 4 are movably connected to the limiting component 8. Part 2 (3), Part 3 (4), and Part 4 (5) are all L-shaped. The bottoms of Part 1 (2), Part 2 (3), Part 3 (4), and Part 4 (5) are all movably connected to the limiting groove 7. Several positioning posts 10 are fixedly connected to the top of the base plate 1. Positioning holes 11 are provided at the bottoms of Part 1 (2), Part 2 (3), Part 3 (4), and Part 4 (5), and the positioning posts 10 are respectively adapted to the positioning holes 11, which facilitates the quick determination of the position of the inserts on the base plate 1 and facilitates the installation of the main body 6. When the inserts After being fitted with the main body 6 and the base plate 1, it can be installed on the mold groove as a lower mold, and the lead frame is stamped by the upper mold. The top of the main body 6 is constructed with a forming groove 16, and the forming groove 16 is connected to the top of the first groove, the top of the second groove and the top of the third groove. One side of the forming groove 16 is constructed with a notched inclined surface 17, and the inclination angle of the notched inclined surface 17 can be controlled between 45° and 75°. The forming groove 16 and the notched inclined surface 17 play an important role in the forming of the lead frame.

[0025] As Figure 1 , Figure 3 , Figure 4 and Figure 5 shown, the limiting assembly 8 includes a connecting plate 801, a moving plate 802, a plug rod 803 and an adjusting rod 804, the moving plate 802 is fixedly connected to the bottom end of the connecting plate 801, the number of the plug rod 803 is three, and the plug rod 803 is fixedly connected to one side of the moving plate 802, the outer side of the adjusting rod 804 is provided with a thread, the adjusting rod 804 penetrates through the moving plate 802, and the adjusting rod 804 is threadedly connected with the moving plate 802, the bottom of the insert piece one 2, the bottom of the insert piece two 3 and the bottom of the insert piece three 4 are all provided with a plug hole 12, the front ends of the plug rods 803 are respectively matched with the plug holes 12, the top of the bottom plate 1 is provided with a moving groove 13, and the moving plate 802 is movably connected to the inside of the moving groove 13, and the adjusting rod 804 is movably connected to the inside of the bottom plate 1, and the plug rod 803 and the moving plate 802 are movably connected to the inside of the limiting groove 7.

[0026] The adjusting rod 804 is rotated by a screwdriver, and drives it to rotate in the inside of the bottom plate 1. Since the adjusting rod 804 is threadedly connected with the moving plate 802, the moving plate 802 moves along the moving groove 13, drives the connecting plate 801 to move in the inside of the limiting groove 7, makes the plug rods 803 respectively inserted into the inside of the plug holes 12, and makes the limiting rods 903 inserted into the inside of the limiting holes 14. At this time, the bottom plate 1 is connected with the main body 6 and the inserts, and the three inserts are further limited, avoiding the separation of the inserts in the process of upward movement of the main body 6, and the plug rods 803 are separated from the plug holes 12, so that the replacement or maintenance of the inserts can be carried out, without the replacement of the whole mold, the single pressing unit can be adjusted, the flexibility of the lower mold is improved, the quality of the finished product is not damaged after the upper mold is stamped when the lower mold is a whole, and the stability of the inserts is improved, the inserts can be kept in a fixed state during the use of the mold, and the quality of the mold pressing is improved.

[0027] As Figure 1 , Figure 5 and Figure 6 shown, the connecting assembly 9 includes a mounting cylinder 901, a return spring 902 and a limiting rod 903, the mounting cylinder 901 is fixedly connected to one side of the connecting plate 801, the inside of the mounting cylinder 901 is fixedly connected with the return spring 902, and the other end of the return spring 902 is fixedly connected with the limiting rod 903. The bottom of the main body 6 is provided with a limiting hole 14, and the limiting hole 14 is communicated with the limiting groove 7. The front end of the limiting rod 903 is provided with a bevel, and the limiting rod 903 is matched with the limiting hole 14. The inside of the main body 6 is threadedly connected with a push rod 15, the front end of the push rod 15 extends to the inside of the limiting hole 14, and the front end of the push rod 15 abuts against the front end of the limiting rod 903.

[0028] If the main body 6 needs to be separated from the bottom plate 1 without causing the movement of the inserts, the push rod 15 can be rotated forward to push the limiting rod 903 out of the inside of the limiting hole 14, so that the limiting rod 903 is retracted into the inside of the mounting cylinder 901, so that the return spring 902 is compressed and shortened, at this time, the connection between the bottom plate 1 and the main body 6 is contacted, that is, the main body 6 can be separated from the bottom plate 1, and the inserts are affected, so as to facilitate the replacement of the main body 6, and the wear of the inserts is observed, and the replacement or restoration operation is performed.

[0029] Working principle: in use, first of all, four inserts are clamped to the top end of the bottom plate 1 in a manner that the positioning column 10 is matched with the positioning hole 11, then the main body 6 is sleeved on the outside of the four inserts, so that the insert one 2 is matched with the insert groove one, the insert two 3 and the insert three 4 are matched with the insert groove two, and the insert four 5 is matched with the insert groove three, and the bottom protruding part of the four inserts is clamped into the inside of the limiting groove 7, and the limiting assembly 8 is clamped into the inside of the limiting groove 7, then the adjusting rod 804 is rotated by a screwdriver, and the moving plate 802 is driven to rotate in the inside of the bottom plate 1, because the adjusting rod 804 is screwed with the moving plate 802, the moving plate 802 is moved along the moving groove 13, the connecting plate 801 is moved in the inside of the limiting groove 7, the plug rod 803 is respectively inserted into the plug hole 12, and the limiting rod 903 is inserted into the limiting hole 14, at this time, the bottom plate 1 is connected with the main body 6 and the inserts; if the main body 6 needs to be separated from the bottom plate 1 without causing the movement of the inserts, the push rod 15 can be rotated forward to push the limiting rod 903 out of the inside of the limiting hole 14, so that the limiting rod 903 is retracted into the inside of the mounting cylinder 901, so that the return spring 902 is compressed and shortened, at this time, the connection between the bottom plate 1 and the main body 6 is contacted, that is, the main body 6 can be separated from the bottom plate 1, and the inserts are affected.

[0030] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A split mold structure suitable for single-sided forming of a lead frame, comprising a base plate (1), an insert one (2), an insert two (3), an insert three (4) and an insert four (5), characterized in that: The top end of the bottom plate (1) is movably connected with a main body (6), the main body (6) is provided with an inlay groove one, an inlay groove two and an inlay groove three, the inlay groove two and the inlay groove three are communicated, the width of the inlay groove three is greater than that of the inlay groove two, the bottom of the main body (6) is provided with a limiting groove (7), and the inlay groove one, the inlay groove two and the inlay groove three are communicated with the limiting groove (7), the inlay piece one (2) is movably matched with the inside of the inlay groove one, the inlay piece two (3) and the inlay piece three (4) are matched with the inlay groove two, and the inlay piece four (5) is matched with the inlay groove three, the top end of the bottom plate (1) is movably connected with a limiting assembly (8), the limiting assembly (8) is movably connected with the inlay piece one (2), the inlay piece two (3) and the inlay piece three (4) respectively, the limiting assembly (8) is fixedly connected with a connecting assembly (9), and the connecting assembly (9) is movably connected with the main body (6), the top end of the main body (6) is provided with a forming groove (16), and the forming groove (16) is communicated with the top end of the inlay groove one, the top end of the inlay groove two and the top end of the inlay groove three, and one side of the forming groove (16) is provided with a notch inclined surface (17).

2. The split mold structure for single side molding of a lead frame according to claim 1, wherein: The inlay piece one (2), the inlay piece two (3), the inlay piece three (4) and the inlay piece four (5) are all L-shaped, the bottom of the inlay piece one (2), the bottom of the inlay piece two (3), the bottom of the inlay piece three (4) and the bottom of the inlay piece four (5) are movably connected with the limiting groove (7), the top end of the bottom plate (1) is fixedly connected with a plurality of positioning columns (10), the bottom of the inlay piece one (2), the bottom of the inlay piece two (3), the bottom of the inlay piece three (4) and the bottom of the inlay piece four (5) are all provided with positioning holes (11), and the positioning columns (10) are matched with the positioning holes (11) respectively.

3. The split mold structure for single side molding of a lead frame according to claim 1, wherein: The limiting assembly (8) comprises a connecting plate (801), a moving plate (802), a plug rod (803) and an adjusting rod (804), the moving plate (802) is fixedly connected to the bottom end of the connecting plate (801), the number of the plug rod (803) is three, the plug rod (803) is fixedly connected to one side of the moving plate (802), and the outer side of the adjusting rod (804) is provided with threads.

4. The split mold structure for single side forming of a lead frame according to claim 3, wherein: The bottom of the inlay piece one (2), the bottom of the inlay piece two (3) and the bottom of the inlay piece three (4) are all provided with plug holes (12), and the front ends of the plug rods (803) are matched with the plug holes (12) respectively.

5. The split mold structure for single side molding of a lead frame according to claim 3, wherein: The top of the bottom plate (1) is provided with a moving groove (13), the moving plate (802) is movably connected in the inside of the moving groove (13), the adjusting rod (804) is movably connected in the inside of the bottom plate (1), and the plug rod (803) and the moving plate (802) are movably connected in the inside of the limiting groove (7).

6. The split mold structure for single side forming of a lead frame according to claim 1, wherein: The connecting assembly (9) comprises a mounting cylinder (901), a reset spring (902) and a limiting rod (903), one side of the mounting cylinder (901) is fixedly connected with the connecting plate (801), the inside of the mounting cylinder (901) is fixedly connected with the reset spring (902), and the other end of the reset spring (902) is fixedly connected with the limiting rod (903).

7. The split mold structure for single side forming of a lead frame according to claim 6, wherein: The bottom of the main body (6) is provided with a limiting hole (14), the limiting hole (14) is communicated with the limiting groove (7), the front end of the limiting rod (903) is provided with an inclined surface, and the limiting rod (903) is matched with the limiting hole (14).

8. The split mold structure for single side forming of a lead frame according to claim 7, wherein: The inside of the main body (6) is threadedly connected with a push rod (15), the front end of the push rod (15) extends into the inside of the limiting hole (14), and the front end of the push rod (15) abuts against the front end of the limiting rod (903).

Images