Control mechanism for forming Z-shaped pin of lead frame

Abstract

According to the control mechanism for forming the Z-shaped pin of the lead frame, the upper mold assembly and the lower mold assembly move relatively, and the side pushing block, the pre-pressing assembly and the side pushing column are matched with one another, so that the Z-shaped pin is formed; the pre-pressing assembly abuts against or is staggered with the first protrusion of the side pushing block through the second protrusion of the ejector plate under the matching effect of the first inclined face of the side pushing block and the second inclined face of the side pushing column, and therefore the effects of pre-pressing the pin and delaying stripping are achieved.

Description

[Technical field]

[0001] The utility model relates to the technical field of lead frame manufacturing, in particular to a control mechanism for forming Z-shaped pins of a lead frame. [Background technology]

[0002] The lead frame is the chip carrier of semiconductor discrete devices. It uses bonding wires to achieve electrical connection between the internal circuit lead-out terminals of the chip and the external leads to form an electrical circuit structure. It acts as a bridge to connect to external wires. Semiconductor discrete devices are widely used in many different types of products including diodes, triodes, transistors, field effect transistors, capacitors, resistors, inductors, etc.

[0003] However, the Z-shaped lead frame manufactured by stamping process has the following problems: a. The gaps between the leads are punched out first, and then the leads are bent and formed. Figure 12-14 As shown in the figure, during the bending process, the pin tip will first be lifted up and hit the forming insert, causing the tip to be damaged. As the punch press moves downward, the damaged area will also increase. Finally, after the pin is formed, it will collapse due to the damage to the tip, resulting in a reduction in the plane area of ​​the pin functional area and damage to the electroplating layer in this area, resulting in a low yield rate of the product; b. First, a narrow gap is built between the pins to connect the two pins together as a whole, then the pins are bent and formed, and finally the narrow gap between the pins is punched out. However, when punching the pin gap, waste is easy to jump out of the die surface, resulting in a low yield rate of the product, and the corresponding punching insert needs to be contoured and ground into the shape during forming, which is time-consuming and easily affects the product delivery time. [Contents of the utility model]

[0004] The utility model aims to provide a control mechanism for forming Z-shaped pins of a lead frame, so as to solve the problems of the manufacturing process of the Z-shaped pin lead frame in the prior art.

[0005] A control mechanism for forming Z-shaped pins of a lead frame comprises a side push block connected to an upper mold component and used for controlling the movement of the mechanism, a pre-pressing component for pre-pressing the pins is arranged between the side push block and the upper mold component, the upper mold component is connected to a side push column for cooperating with the side push block to control the movement of the mechanism, the side push column is connected to a lower mold component and passes through a stripping and forming component.

[0006] In the control mechanism for Z-shaped pin molding of a lead frame as described above, the side push block slides horizontally relative to the upper mold component and abuts against or separates from the pre-pressing component and the side push column respectively.

[0007] As described above, the control mechanism for forming the Z-shaped pins of the lead frame, the pre-pressing component includes a pin plate that slides vertically relative to the upper component and abuts against or separates from the side push block, the pin plate is provided with a pin for pre-pressing the pin that passes through the side push block and the stripping and forming component in sequence, and the pin cooperates with the stripping and forming component to press the pins of the material strip before stamping.

[0008] As described above, in the control mechanism for forming the Z-shaped pins of the lead frame, the side push block is provided with a clearance groove for the ejector pin to pass through and for the side push block to slide in the horizontal direction relative to the ejector pin.

[0009] In the control mechanism for forming the Z-shaped pins of the lead frame as described above, the side push block is provided with a first inclined surface and a first protrusion, the side push column is provided with a second inclined surface matching the first inclined surface, and the ejector plate is provided with a second protrusion.

[0010] As described above, in the control mechanism for forming the Z-shaped pins of the lead frame, chamfers for controlling the relative movement state between the side push block and the ejector plate are respectively provided on both sides of the first protrusion and the second protrusion.

[0011] As described above, in the control mechanism for Z-shaped pin molding of the lead frame, the side of the side push block away from the side push column is connected to the upper mold component through a side push spring, and the ejector plate is connected to the upper mold component through an ejector spring.

[0012] As described above, in the control mechanism for forming the Z-shaped pins of the lead frame, when the upper mold component moves upward relative to the lower mold component, the first protrusion and the second protrusion are driven to be misaligned under the cooperation of the first inclined surface and the second inclined surface, so that the ejector plate is close to the side push block, and then the stripping and forming component is brought into contact with the strip pin through the cooperation of the ejector.

[0013] As described above, in the control mechanism for Z-shaped pin forming of the lead frame, when the upper mold component moves downward relative to the lower mold component, the first protrusion is driven to abut against the second protrusion under the cooperation of the first inclined surface and the second inclined surface, so that the ejector plate is away from the side push block, thereby separating the ejector from the stripping and forming movable block.

[0014] As described above, in the control mechanism for forming the Z-shaped pins of the lead frame, the spacing distance between the side push block and the upper mold component is S, the thickness of the ejector plate is D, the height of the first protrusion is H1, the height of the second protrusion is H2, and the thickness of the material strip is B, wherein S≥D+H1+H2+B.

[0015] The utility model proposes a control mechanism for Z-shaped pin forming of a lead frame, through the relative movement between the upper mold component and the lower mold component, through the mutual cooperation between the side push block, the pre-pressing component and the side push column, so that the pre-pressing component can be abutted or misaligned with the first protrusion of the side push block through the second protrusion of the ejector plate under the cooperation of the first inclined surface of the side push block and the second inclined surface of the side push column, thereby achieving the effect of pre-pressing the pin and delaying the stripping, so as to avoid the problem of bruises caused by displacement of the pin tip during the subsequent stamping process, improve the integrity of the pin tip, reduce the reduction of the functional area plane area and the damage of the electroplating layer caused by bruises, thereby improving the electrical performance and reliability of the final product, and at the same time preventing the material strip that has been pressed and formed from being squeezed and deformed, ensuring the integrity of the pin, thereby ensuring the electrical performance and reliability of the final product. The utility model solves the problem that the tip of the Z-shaped pin is easily bruised during bending and forming, resulting in low product yield.

Brief Description of the Drawings

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0017] Figure 2 yes Figure 1 Magnified view at A in the middle;

[0018] Figure 3 yes Figure 1 Enlarged view at center C;

[0019] Figure 4 This is a schematic diagram of the first working state of the embodiment of the present application;

[0020] Figure 5 This is a schematic diagram of the second working state of the embodiment of the present application;

[0021] Figure 6 This is a schematic diagram of the third working state of the embodiment of the present application;

[0022] Figure 7 This is a schematic diagram of the fourth working state of the embodiment of the present application;

[0023] Figure 8 This is a schematic diagram of the fifth working state of the embodiment of the present application;

[0024] Fig. 9 This is a schematic diagram of the sixth working state of the embodiment of the present application;

[0025] Fig.10 This is a schematic diagram of the seventh working state of the embodiment of the present application;

[0026] Fig.11 This is a schematic diagram of the eighth working state of the embodiment of the present application;

[0027] Fig.12It is a schematic diagram of the initial bending forming state of the conventional pin bending forming;

[0028] Fig.13 It is a schematic diagram of the intermediate bending forming state of the conventional pin bending forming;

[0029] Fig.14 It is a schematic diagram of the final bending forming state of traditional pin bending. [Specific implementation method]

[0030] A control mechanism for forming Z-shaped pins of a lead frame comprises a side push block 2 connected to an upper mold component 1 for controlling the movement of the mechanism, a pre-pressing component 3 for pre-pressing the pins is arranged between the side push block 2 and the upper mold component 1, the upper mold component 1 is connected to a side push column 4 for cooperating with the side push block 2 to control the movement of the mechanism, the side push column 4 is connected to a lower mold component 6 and passes through a stripping and forming component 5.

[0031] Furthermore, the side thrust block 2 slides horizontally relative to the upper mold component 1 and abuts against or separates from the pre-pressing component 3 and the side thrust column 4 respectively.

[0032] Furthermore, the pre-pressing component 3 includes a pin plate 31 that slides vertically relative to the upper mold component 1 and abuts against or separates from the side push block 2. The pin plate 31 is provided with a pin 32 for pre-pressing pins that passes through the side push block 2 and the stripping and forming component 5 in sequence. The pin 32 cooperates with the stripping and forming component 5 to press the pins of the material strip 7 before stamping.

[0033] Furthermore, the upper mold component 1 includes an upper mold base 11, an upper pad 12 and a punch fixing plate 13 which are sequentially connected from top to bottom, and the stripping forming component 5 includes a stripping back plate 53 and a stripping plate 54.

[0034] Furthermore, the lower mold component 6 includes a lower mold base 61, a lower pad 62 and a concave mold plate 63 connected in sequence from bottom to top, and the lower mold component 6 also includes a concave mold plate 63 for stripping, and the concave mold plate 63 is provided with a concave mold forming insert pad 631, a concave mold forming insert fixing block 632, a concave mold forming insert floating block 633, and a concave mold forming insert 634 which is arranged on the concave mold forming insert pad 631 and passes through the concave mold forming insert fixing block 632 and the concave mold forming insert floating block 633 upward in sequence.

[0035] Furthermore, the stripping forming component 5 includes a stripping forming insert 51 for pin forming, and a stripping forming movable block 52 for pre-pressing the pin and disposed inside the stripping forming insert 51 , and the stripping forming movable block 52 slides up and down relative to the stripping forming insert 51 .

[0036] In this embodiment, the side push block and the side push column cooperate to realize the horizontal sliding connection of the side push block on the upper mold component, so that the side push block can be accurately adjusted and controlled according to the needs, thereby improving the flexibility and adaptability of the stamping die. Secondly, the ejector plate is located on the inner side of the side push block and is connected to the upper mold component. The ejector plate is provided with an ejector. This structural design enables the ejector to accurately press the pin tip of the material strip through the stripping and forming movable block, thereby avoiding damage to the pin tip during the stamping process and improving the production quality of the lead frame. The function of the ejector is to cooperate with the stripping and forming movable block to control the sliding of the stripping and forming movable block through abutting or separating actions. When the ejector abuts against the stripping and forming movable block, the ejector will apply a downward pressure to the stripping and forming movable block, causing the stripping and forming movable block to be relatively stripped. The material forming insert slides downward, and this sliding action makes the stripping forming movable block flush with the bottom surface of the stripping plate, preparing for the subsequent cooperation with the die forming insert to clamp the material strip pins. Through the abutment cooperation between the ejector pin and the stripping forming movable block, the sliding stroke of the stripping forming movable block can be accurately controlled, ensuring that during the stamping process, the stripping forming movable block can accurately press the pins of the material strip in the first time, and release it in time when the stripping forming movable block and the die forming insert cooperate to clamp the material strip pins, avoiding deformation of the material strip or damage and deformation of the pins caused by excessive compression. In addition, the stripping forming insert on the stripping forming assembly and the stripping forming movable block slidably connected therein cooperate with the ejector pin to realize the stamping and stripping functions of the material strip, making the stamping process more efficient and reliable.

[0037] Furthermore, the side push block 2 is provided with a clearance groove for the ejector pin 32 to pass through and enable the side push block 2 to slide in the horizontal direction relative to the ejector pin 32. In this embodiment, the existence of the clearance groove enables the ejector pin to pass through the side push block smoothly, avoids the ejector pin from hindering the movement of the side push block, and ensures that the side push block can move in the horizontal direction.

[0038] Furthermore, the side thrust block 2 is provided with a first inclined surface 21 and a first protrusion 22 , the side thrust column 4 is provided with a second inclined surface 41 matched with the first inclined surface 21 , and the ejector plate 31 is provided with a second protrusion 311 .

[0039] Furthermore, chamfers 24 are provided on both sides of the first protrusion 22 and the second protrusion 311 for controlling the relative motion state of the side push block 2 and the ejector plate 31. In this embodiment, the setting of the chamfers makes the relative motion of the first protrusion and the second protrusion smoother when they are converted from a mutually misaligned state to a mutually corresponding abutting state, thereby reducing jamming or friction resistance.

[0040] Furthermore, a side of the side thrust block 2 away from the side thrust column 4 is connected to the upper mold component 1 via a side thrust spring 23 , and the ejector plate 31 is connected to the upper mold component 1 via an ejector spring 33 .

[0041] In this embodiment, by setting the first inclined surface and the second inclined surface on the side push block and the side push column, and setting the first protrusion and the second protrusion on the side push block and the ejector plate, and combining the connection between the ejector spring and the side push spring, the precise positioning and flexible movement of the pre-pressing assembly are achieved. The cooperation of the first inclined surface and the second inclined surface can drive the ejector plate to drive the ejector to move in the vertical direction; the setting of the first protrusion and the second protrusion can realize that the relative position between the side push block and the ejector plate is restricted or released when the upper mold assembly rises or falls relative to the lower mold assembly, respectively, so that the stripping and forming movable block can just press the pin tip of the material strip or perform the next stamping operation. The connection between the ejector spring and the side push spring provides the necessary elastic restoring force, ensuring the stable operation and reliable positioning of the pre-pressing assembly.

[0042] Further, when the upper mold component 1 moves upward relative to the lower mold component 6, the first protrusion 22 and the second protrusion 311 are misaligned under the cooperation of the first inclined surface 21 and the second inclined surface 41, so that the ejector plate 31 is close to the side push block 2, and then the ejector 32 cooperates to make the stripping and forming component 5 abut against the pins of the material belt 7. Furthermore, the stripping and forming movable block 52 of the stripping and forming component 5 abuts against the pins of the material belt 7.

[0043] Further, when the upper mold component 1 moves downward relative to the lower mold component 6, the first protrusion 22 is driven to abut against the second protrusion 311 under the cooperation of the first inclined surface 21 and the second inclined surface 41, so that the ejector plate 31 is away from the side push block 2, and then the ejector 32 is separated from the stripping and forming component 5. Furthermore, the ejector 32 is separated from the stripping and forming movable block 52 of the stripping and forming component 5.

[0044] Furthermore, when the upper mold component 1 moves downward relative to the lower mold component 6, the die forming insert floating block 633 slides downward along the die forming insert 634 relative to the die forming insert fixing block 632, and the top of the die forming insert 634 sinks into the die forming insert floating block 633.

[0045] In this embodiment, when the floating block of the die forming insert drives the already pressed and formed material strip to move upward, under the cooperation of the pre-pressing assembly, the ejector moves up a certain distance so that the stripping forming movable block is not abutted by the ejector, so as to provide a space when the floating block of the die forming insert drives the material strip to rise, and prevent the already pressed and formed material strip pins from being squeezed and deformed, thereby achieving the effect of delayed stripping. And when the floating block of the die forming insert slides upward, the top of the die forming insert sinks into it, so that the material strip can be smoothly placed on the die forming insert. And when the floating block of the die forming insert slides downward, the top of the die forming insert bulges outward, and cooperates with the stripping forming insert to stamp the material strip. This floating structure design enables the die forming insert to be flexibly raised and lowered according to the needs of the stamping process, which not only facilitates the positioning and placement of the material strip, but also ensures the accuracy and consistency of the stamping. In addition, the gap distance between the ejector pin and the stripping and forming movable block can be specifically set according to the bending height of the upper and lower pins of the Z-shaped material strip.

[0046] Furthermore, the spacing distance between the side push block 2 and the upper mold component 1 is S, the thickness of the ejector plate 31 is D, the height of the first protrusion 22 is H1, the height of the second protrusion 311 is H2, and the thickness of the material strip 7 is B, wherein S≥D+H1+H2+B.

[0047] In this embodiment, by setting the spacing S between the side push block and the upper mold component and ensuring that S is greater than the sum of the ejector plate thickness D, the first protrusion height H1, the second protrusion height H2 and the strip thickness B, interference between the side push block and the ejector plate during the stamping process can be effectively avoided, ensuring that the ejector can smoothly pass through the side push block and accurately press the pin tip of the strip through the stripping and forming movable block, and leaving space for the ejector plate to float up during stamping. The ejector plate is prevented from colliding or getting stuck, thereby reducing the wear and failure risk of the mold. At the same time, the correct positioning and pressing of the ejector pin to the pin tip of the strip is ensured, thereby improving the manufacturing accuracy and yield rate of the lead frame.

[0048] The working principle of this embodiment is as follows: Figure 4-11 As shown, E is the gap between the punch fixed plate and the stripping back plate, F is the gap between the ejector pin and the stripping back plate, G is the gap between the side push block and the ejector plate, J is the distance between the stripping forming active block and the stripping forming insert surface, and K is the gap between the stripping plate and the concave template;

[0049] The first working status is as attached Figure 4 As shown, the upper mold assembly is at the bottom dead center, the second protrusion of the ejector plate and the first protrusion of the side push block are spaced 0.500mm apart, and the ejector is in contact with the stripping and forming movable block. At this time, E is 8.48mm, F is 0.220mm, G is 0.500mm, J is 0.250mm, and K is 0.000mm;

[0050] The second working state is as follows Figure 5 As shown, the upper mold component is in a state of 1mm upward on the basis of the first working state, the stripper plate is fitted with the concave mold plate, the second protrusion of the ejector plate is in the initial contact state with the first protrusion of the side push block, and at this time, the ejector and the stripper forming movable block are spaced 0.5mm to provide a gap when the floating block of the concave mold forming insert drives the material strip to rise, so as to prevent the pressed and formed material strip from being squeezed and deformed, and achieve the effect of delayed stripping. At this time, E is 9.48mm, F is 0.720mm, G is 0.000mm, J is 0.250mm, and K is 1.000mm;

[0051] The third working state is as follows Figure 6 As shown, the upper mold component is in the state of 1mm upward on the basis of the second working state, the die forming floating block rises 1mm, the stripper plate sticks to the die forming floating block, the second protrusion of the ejector plate and the first protrusion of the side push block are in a zero-gap contact state, and the side push column pushes the side push block to start moving to the left. At this time, E is 9.48mm, F is 0.720mm, G is 0.000mm, J is 0.250mm, and K is 2.000mm;

[0052] The fourth working state is as follows Figure 7 As shown, the upper mold component moves up 1mm on the basis of the third working state, the die forming floating block stays in the third working state position, the stripper plate is out of contact with the die forming floating block, the second protrusion of the ejector plate and the first protrusion of the side push block are in a zero-gap contact state, and the side push column pushes the side push block to continue to move to the left. At this time, E is 9.48mm, F is 0.720mm, G is 0.000mm, J is 0.250mm, and K is 3.000mm;

[0053] The fifth working state is as follows Figure 8 As shown, the upper mold component is in a state of 9mm upward on the basis of the fourth working state, the die forming floating block stays in the fourth working state position, the stripper plate is away from the contact with the die forming floating block, the second protrusion of the ejector plate is misaligned with the first protrusion of the side push block, that is, it falls into the groove of the side push block, and the side push column pushes the side push block to continue to move to the left. At this time, E is 9.48mm, F is 0.000mm, G is 0.280mm, J is 0.000mm, and K is 12.00mm;

[0054] The sixth working state is as attached Fig. 9As shown, the upper mold component is in a state of 5mm upward on the basis of the fifth working state, the die forming floating block stays in the seventh working state position, the stripper plate is away from the contact with the die forming floating block, the second protrusion of the ejector plate is misaligned with the first protrusion of the side push block, that is, it is in the groove of the side push block, and the side push block is in the leftmost position and does not continue to move to the left. At this time, E is 9.48mm, F is 0.000mm, G is 0.280mm, J is 0.000mm, and K is 17.00mm;

[0055] The seventh working status is as attached Fig.10 As shown, the upper mold component moves upward to the upper dead center position on the basis of the sixth working state, the die forming floating block stays in the sixth working state position, the stripper plate is away from the contact with the die forming floating block, the second protrusion of the ejector plate is misaligned with the first protrusion of the side push block, that is, it is in the groove of the side push block, and the side push block is in the leftmost position and does not continue to move to the left. At this time, E is 9.48mm, F is 0.000mm, G is 0.280mm, J is 0.000mm, and K is 25.00mm;

[0056] The eighth working state is as attached Fig.11 As shown, the upper mold component moves downward from the top dead center position until the stripper plate is away from the contacting die forming floating block (the die forming floating block is 1mm higher than the die plate surface). At this time, the stripper forming movable block presses the pin to prevent the pin from warping up during forming. The second protrusion of the ejector plate is misaligned with the first protrusion of the side push block, that is, it is in the groove of the side push block. The side push block is in the leftmost position and does not continue to move to the left. At this time, E is 9.48mm, F is 0.000mm, G is 0.280mm, J is 0.000mm, and K is 2.00mm.

[0057] The utility model proposes a control mechanism for Z-shaped pin forming of a lead frame, through the relative movement between the upper mold component and the lower mold component, through the mutual cooperation between the side push block, the pre-pressing component and the side push column, so that the pre-pressing component can be abutted or misaligned with the first protrusion of the side push block through the second protrusion of the ejector plate under the cooperation of the first inclined surface of the side push block and the second inclined surface of the side push column, thereby achieving the effect of pre-pressing the pin and delaying the stripping, so as to avoid the problem of bruises caused by displacement of the pin tip during the subsequent stamping process, improve the integrity of the pin tip, reduce the reduction of the functional area plane area and the damage of the electroplating layer caused by bruises, thereby improving the electrical performance and reliability of the final product, and at the same time preventing the material strip that has been pressed and formed from being squeezed and deformed, ensuring the integrity of the pin, thereby ensuring the electrical performance and reliability of the final product. The utility model solves the problem that the tip of the Z-shaped pin is easily bruised during bending and forming, resulting in low product yield.

[0058] As described above, an implementation method is provided in combination with specific content, and it is not intended that the specific implementation of the utility model is limited to these descriptions. Any technical deduction, replacement, improvement, etc. that is identical or similar to the scheme of the utility model or made based on this should be regarded as the scope of protection of this patent.

Claims

1. A control mechanism for forming Z-shaped pins of a lead frame, characterized in that: The invention comprises a side push block (2) connected to an upper mold component (1) for controlling the movement of a mechanism, a pre-pressing component (3) for pre-pressing a pin is arranged between the side push block (2) and the upper mold component (1), the upper mold component (1) is connected to a side push column (4) for cooperating with the side push block (2) to control the movement of the mechanism, and the side push column (4) is connected to a lower mold component (6) and passes through a stripping and forming component (5).

2. The control mechanism for forming Z-shaped pins of a lead frame according to claim 1, characterized in that: The side thrust block (2) slides in the horizontal direction relative to the upper mold component (1) and abuts against or separates from the pre-pressing component (3) and the side thrust column (4) respectively.

3. The control mechanism for forming Z-shaped pins of a lead frame according to claim 2, characterized in that: The pre-pressing component (3) comprises a pin plate (31) which slides vertically relative to the upper mold component (1) and abuts against or separates from the side push block (2); the pin plate (31) is provided with a pin (32) for pre-pressing pins which passes through the side push block (2) and the stripping and forming component (5) in sequence; the pin (32) cooperates with the stripping and forming component (5) to press the pins of the material strip (7) before stamping.

4. The control mechanism for forming Z-shaped pins of a lead frame according to claim 3, characterized in that: The side push block (2) is provided with a clearance groove for the ejector pin (32) to pass through and enables the side push block (2) to slide in a horizontal direction relative to the ejector pin (32).

5. The control mechanism for forming Z-shaped pins of a lead frame according to claim 3, characterized in that: The side thrust block (2) is provided with a first inclined surface (21) and a first protrusion (22), the side thrust column (4) is provided with a second inclined surface (41) matching with the first inclined surface (21), and the ejector plate (31) is provided with a second protrusion (311).

6. The control mechanism for forming Z-shaped pins of a lead frame according to claim 5, characterized in that: Chamfers (24) for controlling the relative motion state of the side push block (2) and the ejector plate (31) are respectively provided on both sides of the first protrusion (22) and the second protrusion (311).

7. The control mechanism for forming Z-shaped pins of a lead frame according to claim 3, characterized in that: The side of the side thrust block (2) away from the side thrust column (4) is connected to the upper mold component (1) via a side thrust spring (23), and the ejector plate (31) is connected to the upper mold component (1) via an ejector spring (33).

8. The control mechanism for forming Z-shaped pins of a lead frame according to claim 5, characterized in that: When the upper mold component (1) moves upward relative to the lower mold component (6), the first bevel (21) and the second bevel (41) cooperate to drive the first protrusion (22) and the second protrusion (311) to be misaligned, so that the ejector plate (31) is close to the side push block (2), and then the ejector (32) cooperates to make the stripping and forming component (5) abut against the pin of the material strip (7).

9. The control mechanism for forming Z-shaped pins of a lead frame according to claim 5, characterized in that: When the upper mold component (1) moves downward relative to the lower mold component (6), the first protrusion (22) and the second protrusion (311) are driven to abut against each other under the cooperation of the first inclined surface (21) and the second inclined surface (41), so that the ejector plate (31) is moved away from the side push block (2), thereby separating the ejector (32) from the stripping and forming component (5).

10. The control mechanism for forming Z-shaped pins of a lead frame according to claim 5, characterized in that: The spacing distance between the side push block (2) and the upper mold component (1) is S, the thickness of the ejector plate (31) is D, the height of the first protrusion (22) is H1, the height of the second protrusion (311) is H2, and the thickness of the material strip (7) is B, wherein S≥D+H1+H2+B.

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