Double-layer pin trimming die and device

Abstract

A double-layer pin cutting mold and device, the double-layer pin cutting mold comprising: an upper mold set, a lower mold set and a cutter assembly. The upper mold set comprises an upper mold plate, below which a pressing plate is arranged, the bottom surface of the pressing plate is provided with protrusions on both sides, the bottom of the upper mold plate is provided with a column of ejector pins corresponding to both sides of the pressing plate, the bottom surface of each of the two push plates arranged on both sides of the upper mold plate has an inner inclined surface facing the pressing plate; the lower mold set comprises a bottom plate, above which a support plate is arranged, the width of the top surface of the support plate is consistent with the distance between the outer ends of the two pins on both sides of the shell; the cutter assembly comprises a pair of horizontal cutters arranged in parallel and spaced apart above the support plate; the bottom surface of the outer side of the horizontal cutter is embedded with a horizontally arranged lifting cutter; when the upper mold plate moves downward, the inner inclined surface is used to push the two horizontal cutters to move to the middle, and the ejector pin is used to push the lifting cutter to move downward. The cutting device comprises the double-layer pin cutting mold described above. The scheme has higher cutting precision and efficiency.

Description

Technical Field

[0001] This invention belongs to the field of lead cutting technology, and particularly relates to a double-layer lead cutting mold and device. Background Technology

[0002] Some network filters are packaged in a separate unit, a design choice largely determined by the filter's specifications. These filters consist of an injection-molded housing and a small circuit board, with the circuit board removably mounted within a recess in the housing. For example... Figure 1 As shown, a common housing typically has a row of pins on each of its top and bottom sides for circuit connections. The pins on the bottom sides extend towards the width of the housing, while the pins on the top sides extend upwards. During manufacturing, two lead frames are injection molded and cured integrally with the housing, placing the two lead frames on the bottom and top surfaces of the housing respectively. For ease of positioning and fixation, the lead frames are arranged in parallel. After injection molding, the two sides of the lead frames extend to the outside of the housing on both sides. Figure 2 As shown, to improve production efficiency, a row of multiple shells is usually formed on the lead frame, and then bent and punched to form a shape like... Figure 1 The image shows a single housing. Current processes typically require multiple machines and multiple steps to complete this. The first step involves bending the lead frames on both sides of the top surface of the housing upwards by 90 degrees. The second step involves punching off the process edges of the lead frames on both sides of the top surface of the housing. The third step involves punching off the process edges of the lead frames on both sides of the bottom surface of the housing, ultimately forming a housing as shown. Figure 1 The filter housing shown is an example. Because the product needs to be transferred between different devices, this not only increases time and management costs, but also requires repeated positioning and fixing of the product. Even with high equipment precision, it's impossible to guarantee that the positioning accuracy and reference point are exactly the same each time. This can easily lead to differences in the bending and rib cutting positions of the pins on each housing, affecting the final shape and position of the product pins. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a double-layer pin cutting mold and device, which has higher cutting accuracy and efficiency.

[0004] In order to achieve the objective of this invention, the following solution is proposed: A double-layer lead cutting die, comprising: an upper die, a lower die, and a cutting blade assembly.

[0005] The upper module includes an upper template that moves vertically, a pressure plate below it, and an elastic element between the pressure plate and the upper template. Both sides of the bottom surface of the pressure plate are provided with protruding strips, and the edges between the outer side and the top surface of the protruding strips are cutting edges. The bottom of the upper template is provided with a row of push rods on each side of the pressure plate, with the push rods pointing vertically downwards. Each side of the upper template is provided with a push plate parallel to the pressure plate, and the bottom surface of the push plate facing the pressure plate has an inner inclined surface. The lower module includes a base plate with a support plate on top. A support spring is provided between the bottom of the support plate and the base plate. The spring force is less than that of the elastic element. The width of the top surface of the support plate is consistent with the distance between the outer ends of the pins on both sides of the housing. The edges between the sides and the top surface of the support plate are cutting edges. The cutting assembly includes a pair of horizontal cutters, which are parallel and spaced apart above the support plate. The spacing between the horizontal cutters matches the width of the housing. The thickness of the horizontal cutters is less than the spacing between the top and bottom lead frame of the housing. The edge between the inner side of the horizontal cutter and the bottom surface is the cutting edge. A horizontally arranged lifting cutter is embedded in the bottom surface of the outer side of the horizontal cutter. A return spring is provided at the bottom of the lifting cutter. The corner between the inner side of the lifting cutter and the bottom surface is the cutting edge. When the upper template moves downward, the inner inclined surface is used to push the two horizontal cutters to move towards the middle, and the top rod is used to push the lifting cutter downward. The horizontal cutter has through holes for the top rod to pass through.

[0006] The rebar cutting device includes the aforementioned double-layer lead rebar cutting mold.

[0007] The beneficial effects of this invention are as follows: This solution only requires moving the upper module downward to sequentially and continuously complete the bending and cutting of the upper lead frame and the cutting of the lower lead frame. The entire process only requires one positioning and clamping, which effectively improves the dimensional accuracy of the product pins after cutting and reduces intermediate transfer links, thus helping to improve production efficiency. Attached Figure Description

[0008] The accompanying drawings described herein are merely illustrative of selected embodiments, not all possible implementations, and are not intended to limit the scope of the invention.

[0009] Figure 1 A schematic diagram of the network filter housing is shown.

[0010] Figure 2 This diagram shows the structure of the double-layer lead frame on the housing before the reinforcing bars are cut.

[0011] Figure 3 A schematic diagram of the rebar cutting mold of this application is shown.

[0012] Figure 4 A schematic diagram of the lifting cutter is shown.

[0013] Figure 5 A cross-sectional view of the rib-cutting mold of this application is shown when the pressure plate presses the housing.

[0014] Figure 6 A cross-sectional view of the bead-cutting die of this application is shown when the upper lead frame is bent.

[0015] Figure 7 A cross-sectional view of the bead cutting mold of this application is shown after the upper lead frame has been bent.

[0016] Figure 8 A cross-sectional view of the cutting die of this application is shown when the upper lead frame is cut.

[0017] Figure 9 A cross-sectional view of the cutting die of this application is shown when the lower lead frame is cut.

[0018] The markings in the diagram are: upper template-1, top rod-11, pressure plate-2, elastic element-21, protruding strip-22, push plate-3, inner inclined surface-31, bottom plate-4, support spring-41, guide rail-42, magnet-43, discharge chute-44, support plate-5, connecting rod-51, horizontal cutter-6, slider-61, lifting cutter-7, return spring-71, and locking block-72. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the implementation methods of the present invention will be described in detail below with reference to the accompanying drawings. However, the embodiments described in this invention are only some embodiments of the present invention, and not all embodiments.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, and are only for the convenience of describing the invention and simplifying the description. The terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "parallel," "vertical," etc., do not mean that the components are required to be absolutely parallel or perpendicular, but can be slightly tilted.

[0022] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] Example 1 like Figure 3 As shown, a double-layer pin cutting mold includes: an upper module, a lower module, and a cutting blade assembly.

[0024] Specifically, such as Figure 3 , Figure 5 As shown, the upper module includes an upper template 1 that moves vertically, a pressure plate 2 below it, and an elastic element 21 between the pressure plate 2 and the upper template 1. The elastic element 21 has a vertical elastic force direction and is used to provide vertical downward pressure to the pressure plate 2. At the same time, the elastic element 21 has a predetermined range of movement relative to the upper template 1 in the vertical direction. Both sides of the bottom surface of the pressure plate 2 are provided with horizontally arranged protrusions 22. The spacing between the outer sides of the protrusions 22 is the same as the width of the shell. The edge between the outer side of the protrusions 22 and the top surface is a cutting edge. The bottom of the upper template 1 is provided with a row of push rods 11 on each side of the pressure plate 2. The push rods 11 are vertically downward and each row of push rods 11 is parallel to the protrusions 22. Both sides of the upper template 1 are provided with a push plate 3 that is parallel to the pressure plate 2. The bottom surface of the push plate 3 facing the pressure plate 2 has an inner inclined surface 31.

[0025] Specifically, such as Figure 3 , Figure 5 As shown, the lower module includes a base plate 4, on which a support plate 5 is provided. A support spring 41 is provided between the bottom of the support plate 4 and the base plate 4. The spring force is less than that of the elastic element 21. The support plate 5 is located directly below the pressure plate 2, and the top surface of the support plate 5 is parallel to the bottom surface of the pressure plate 2. The width of the top surface of the support plate 5 is consistent with the distance between the outer ends of the pins on both sides of the finished product housing. The edges between the two sides and the top surface of the support plate 5 are cutting edges.

[0026] Specifically, such as Figure 3 , Figure 5As shown, the cutting assembly includes a pair of horizontal cutters 6, both of which are parallel to each other above the support plate 5. In the initial state, the support plate 5 is in its highest position, and the gap between its top surface and the bottom surface of the horizontal cutter 6 is greater than the thickness of the lead frame, which is used to pass through the lead frames on both sides of the bottom of the housing. The spacing between the horizontal cutters 6 matches the width of the housing, allowing the housing to pass between the horizontal cutters 6. The thickness of the horizontal cutter 6 is less than the spacing between the lead frames on the top and bottom surfaces of the housing. The edge between the inner side of the horizontal cutter 6 and the bottom surface is the cutting edge, which, in conjunction with the cutting edges on both sides of the protrusion 22, is used to cut off the lead frames on both sides of the top surface of the housing. A horizontally arranged lifting cutter 7 is embedded in the bottom surface of the outer side of the horizontal cutter 6, and a return spring 71 is provided at its bottom. The edge between the inner side of the lifting cutter 7 and the bottom surface is the cutting edge, which, in conjunction with the cutting edges on both sides of the support plate 5, cuts off the lead frames on both sides of the bottom surface of the housing.

[0027] like Figure 7 , Figure 8 As shown, when the upper template 1 moves downward, the inner inclined surface 31 is used to push the two horizontal cutters 6 to move towards the middle, and the top rod 11 is used to push the lifting cutter 7 to move downward. The horizontal cutter 6 has a through hole for passing through the top rod 11, and in the direction of movement of the horizontal cutter 6, the difference between the size of the through hole and the size of the cross section of the top rod 11 is greater than the range of the horizontal cutter 6 moving in the horizontal direction.

[0028] The above scheme is adopted for, for example Figure 2 The principle of the double-layer lead frame cutting is as follows: like Figure 5 As shown, the double-layer lead frame is inserted from one end of the lower module, so that the housing passes between the two horizontal cutters 6. The bottom surface of the housing is supported by the top surface of the support plate 5. The lead frames on both sides of the bottom of the housing pass between the top surface of the support plate 5 and the bottom surface of the horizontal cutters 6 on both sides. The inner end of the horizontal cutter 6 passes between the upper and lower lead frames. The lead frames on both sides of the top of the housing are located above the horizontal cutters 6. The purpose of limiting the double-layer lead frame can be achieved in the above way, and it has high positioning accuracy. Move the upper module down, as shown. Figure 5 As shown, the bottom surface of the pressure plate 2 will first press against the housing to prevent product displacement. Then, the pressure plate 2 will push the housing and support plate 5 downwards, compressing the support spring 41, as... Figure 6 As shown, during this process, the lead frames on both sides of the top surface of the housing gradually begin to bend upwards due to the obstruction of the upper inner edge of the horizontal cutter 6; as Figure 7As shown, when the bottom surface of the support plate 5 contacts the top surface of the base plate 4, the lead frames on both sides of the top surface of the housing are bent into a vertical state, and the top surface of the housing is lower than the bottom surface of the horizontal cutter 6 by a predetermined distance. This distance is equal to the length of the pins protruding from the housing on both sides of the top surface. During this process, the push rod 11 begins to gradually push the lifting cutter 7 downward, but there is still a gap between the lifting cutter 7 and the lower lead frame. Continue to move the upper module downward, as... Figure 8 As shown, the push plate 3 pushes the two horizontal cutters 6 towards the center via the inner inclined surface 31. The cutting edges of the horizontal cutters 6 engage with the cutting edges on both sides of the protrusion 22 to cut off excess lead frames on both sides of the top surface of the housing, thus forming leads on both sides of the top surface of the housing. During this process, the elastic element 21 begins to compress. As the horizontal cutters 6 move towards the center, the lifting cutter 7 moves along with them. When the outer side of the horizontal cutter 6 contacts the inner side of the push plate 3, the horizontal cutter 6 will not continue to move towards the center as the upper module continues to descend. On the other hand, there will be a small relative sliding distance between the push rod 11 and the lifting cutter 7. Because the horizontal cutter 6 is already close to the outer side of the housing, and the thickness of the lead frame is usually 1mm-2mm, the horizontal cutter 6 does not require a large travel distance; a travel distance of 3mm-5mm is sufficient to complete the lead cutting work. Continuing to move the upper module downwards, as... Figure 9 As shown, the push rod 11 pushes the lifting cutter 7 to continue moving downward to the predetermined position, so that the cutting edge of the lifting cutter 7 cooperates with the cutting edges on both sides of the support plate 5 to remove the excess lead frame on both sides of the bottom surface of the housing, thereby forming pins on both sides of the bottom surface of the housing. During this process, the elastic element 21 will continue to be compressed.

[0029] After the rib cutting is completed, the pressure plate 2 can be returned to the predetermined position on the upper template 1 by the elastic element 21, the support plate 5 can be raised to the initial highest position by the support spring 41, the lifting cutter 7 can be reset by the reset spring 71, and the horizontal cutter 6 can also be automatically reset by the spring. Then, the single-structure shell can be pushed out along one end of the lower module.

[0030] The above solution only requires moving the upper module downwards to sequentially and continuously complete the bending and cutting of the upper lead frame and the cutting of the lower lead frame. The entire process only requires one positioning and clamping, and there is only one positioning reference. This effectively improves the dimensional accuracy of the product pins after cutting and reduces intermediate transfer links, which helps to improve production efficiency, while reducing equipment investment and production costs.

[0031] Preferred, such as Figure 3As shown, each horizontal cutter 6 is connected to a slider 61, which facilitates the individual replacement of the horizontal cutter 6 after it wears out. At least two guide rails 42 are provided on each side of the support plate 5 on the base plate 4, which are arranged along the width direction of the support plate 5. The slider 61 is slidably mounted on the guide rails 42. Magnets 43 are also provided on both sides of the base plate 4 to attract the slider 61 so that the horizontal cutter 6 can automatically reset. When the slider 61 is attracted to the magnet 43, the distance between the two horizontal cutters 6 matches the width of the housing.

[0032] Preferred, such as Figures 3 to 5 As shown, a rectangular groove is provided at the bottom of the outer end of the horizontal cutter 6 to accommodate the lifting cutter 7, so as to prevent the bottom surface of the lifting cutter 7 from protruding from the bottom surface of the horizontal cutter 6 in the initial state, thereby affecting the horizontal cutter 6 from passing between the two layers of lead frame. A locking block 72 is provided on the outer side of the lifting cutter 7, which is slidably located on the inner side of the guide rail 42. A return spring 71 is located between the bottom of the locking block 72 and the bottom of the guide rail 42.

[0033] Preferred, such as Figure 3 , Figure 5 As shown, the top surface of the base plate 4 is provided with discharge grooves 44 on both sides of the support plate 5. The length direction of the grooves is parallel to that of the support plate 5. The grooves are used to discharge the excess material cut off by the lower lead frame. The excess material generated by the upper lead frame will be carried out by the protrusions when the upper module moves upward, and can be cleaned manually. The bottom surface of the discharge groove 44 is inclined to facilitate the automatic sliding out of the excess material.

[0034] Preferred, such as Figure 3 , Figure 5 As shown, a T-shaped groove is provided at the bottom of the upper template 1 along the length direction. The cross-section of the upper end of the pressure plate 2 matches the T-shaped groove, and the pressure plate 2 passes through the T-shaped groove from the upper end. The elastic element 21 is provided between the top surface of the pressure plate 2 and the top surface of the T-shaped groove, and is normally in a compressed state.

[0035] Preferably, the protrusions 22 on both sides of the pressure plate 2 are provided on the same flat plate, and the flat plate is detachably provided on the bottom surface of the pressure plate 2, so that it is easy to replace after wear.

[0036] Preferred, such as Figure 5 As shown, a connecting rod 51 is vertically provided at the bottom of the support plate 5, which passes downward through the base plate 4. A support spring 41 is sleeved on the connecting rod 51. A baffle is provided at the lower end of the connecting rod 51, which is located below the base plate 4 to limit the extreme position of the upward movement of the support plate 5 and prevent the connecting rod 51 from falling off. More preferably, countersunk holes are provided on the top surface of the base plate 4 at the positions where the connecting rod 51 passes through, for installing the support spring 41, providing sufficient space for the support spring 41, and avoiding affecting the contact between the support plate 5 and the base plate.

[0037] Preferred, such as Figure 3As shown, the junction between the inner side of the horizontal cutter 6 and the top surface is an arc structure to facilitate smoother bending of the upper pins.

[0038] Example 2, A rebar cutting device includes a double-layer pin rebar cutting mold as described in Embodiment 1, with the top of the upper template 1 connected to a hydraulic lifting device.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to be the only or limiting of the invention. Those skilled in the art should understand that various changes or equivalent substitutions made to the present invention without departing from its scope are all within the protection scope of the present invention.

Claims

1. A double-layer lead cutting die, comprising: The upper module, lower module, and cutting blade assembly are characterized by: The upper module includes an upper template (1) that moves vertically, and a pressure plate (2) is provided below it. An elastic element (21) is provided between the pressure plate (2) and the upper template (1). Both sides of the bottom surface of the pressure plate (2) are provided with protrusions (22). The edge between the outer side and the top surface of the protrusions (22) is a cutting edge. The bottom of the upper template (1) is provided with a row of push rods (11) on each side of the pressure plate (2). The push rods (11) are vertically downward. Each side of the upper template (1) is provided with a push plate (3) that is parallel to the pressure plate (2). The bottom surface of the push plate (3) facing the pressure plate (2) has an inner inclined surface (31). The lower module includes a base plate (4), on which a support plate (5) is provided. A support spring (41) is provided between the bottom of the support plate (5) and the base plate (4), and its elastic force is less than that of the elastic element (21). The width of the top surface of the support plate (5) is consistent with the distance between the outer ends of the pins on both sides of the housing. The edges between the sides and the top surface of the support plate (5) are cutting edges. The cutting assembly includes a pair of horizontal cutters (6), which are arranged parallel and spaced above the support plate (5). The distance between the horizontal cutters (6) matches the width of the housing. The thickness of the horizontal cutters (6) is less than the distance between the top and bottom lead frame of the housing. The edge between the inner side of the horizontal cutter (6) and the bottom surface is the cutting edge. A horizontally arranged lifting cutter (7) is embedded on the bottom surface of the outer side of the horizontal cutter (6). A return spring (71) is provided at its bottom. The corner between the inner side of the lifting cutter (7) and the bottom surface is the cutting edge. When the upper template (1) moves downward, the inner inclined surface (31) is used to push the two horizontal cutters (6) to move towards the middle, and the top rod (11) is used to push the lifting cutter (7) to move downward. The horizontal cutter (6) has a through hole for passing through the top rod (11).

2. The double-layer lead cutting die according to claim 1, characterized in that, The horizontal cutter (6) is connected to a slider (61) respectively. At least two guide rails (42) are provided on each side of the support plate (5) on the base plate (4). They are arranged along the width direction of the support plate (5). The slider (61) slides on the guide rail (42). Magnets (43) are also provided on both sides of the base plate (4). When the slider (61) is attracted to the magnet (43), the distance between the two horizontal cutters (6) matches the width of the shell.

3. A double-layer lead cutting die according to claim 2, characterized in that, A rectangular groove is provided at the bottom of the outer end of the horizontal cutter (6) to accommodate the lifting cutter (7). A locking block (72) is provided on the outer side of the lifting cutter (7), which is slidably located on the inner side of the guide rail (42). A reset spring (71) is located between the bottom of the locking block (72) and the bottom of the guide rail (42).

4. A double-layer lead cutting die according to claim 1, characterized in that, The top surface of the base plate (4) is provided with discharge grooves (44) on both sides of the support plate (5), and the length direction is parallel to the support plate (5). The bottom surface of the discharge grooves (44) is inclined.

5. A double-layer lead cutting die according to claim 1, characterized in that, The bottom of the upper template (1) is provided with a T-shaped groove along the length direction. The cross section of the upper end of the pressure plate (2) matches the T-shaped groove, and the pressure plate (2) passes through the upper end into the T-shaped groove. The elastic element (21) is provided between the top surface of the pressure plate (2) and the top surface of the T-shaped groove, and is normally in a compressed state.

6. A double-layer lead cutting die according to claim 1, characterized in that, The protrusions (22) on both sides of the pressure plate (2) are provided on the same flat plate, and the flat plate is detachably provided on the bottom surface of the pressure plate (2).

7. A double-layer lead cutting die according to claim 1, characterized in that, A connecting rod (51) is vertically provided at the bottom of the support plate (5), which passes downward through the base plate (4). A support spring (41) is sleeved on the connecting rod (51). A baffle is provided at the lower end of the connecting rod (51), which is located below the base plate (4).

8. A double-layer lead cutting die according to claim 1, characterized in that, The junction between the inner side and the top surface of the horizontal cutter (6) is an arc structure.

9. A tendon cutting device, characterized in that, The double-layer pin cutting mold according to any one of claims 1 to 8, wherein the top of the upper template (1) is connected to a hydraulic lifting device.

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