A notebook computer housing side cutting die

Abstract

This utility model discloses a side-cutting mold for laptop casing, used for side-cutting the sidewall of C-part casing. The side-cutting mold includes an upper mold and a lower mold that cooperates with the upper mold. The upper mold includes an upper mold assembly, several elastic mechanisms disposed within the upper mold assembly, an inner ejector plate connected to the upper mold assembly, and an upper mold cutting edge disposed on one side of the inner ejector plate. The lower mold includes a lower mold assembly, a contour plate disposed on the upper end of the lower mold assembly for supporting the casing, several positioning components disposed on the contour plate, a driving assembly disposed on the lower end of the contour plate, a side-cutting assembly distributed on one side of the driving assembly, and two spaced lower mold cutting edges. The side-cutting assembly includes a lower mold punch adapted to the shape of the area to be cut. In the mold-closed state, the inner ejector plate presses against the upper end of the casing, the upper mold cutting edge can abut against the outside of the upper part of the area to be cut on the casing, and the lower mold punch is located inside the area to be cut on the casing. The cutting edge is divided into an upper mold cutting edge and a lower mold cutting edge according to the area to be cut, which improves the structural strength and prevents material jamming.

Description

Technical Field

[0001] This utility model belongs to the field of laptop shell processing technology, specifically relating to a side-cutting mold for laptop shells. Background Technology

[0002] In a laptop's casing structure, the C-shell refers to the keyboard surface, which includes the keyboard, palm rest, and touchpad. With the laptop lid closed, the components from top to bottom are: A-shell (top cover), B-shell (screen area), C-shell (keyboard area), and D-shell (bottom). As the main frame of the laptop, the C-shell not only protects the internal electronic components, but its structural design and manufacturing quality directly affect the laptop's aesthetics, overall weight, heat dissipation, and user experience. Due to the complex shape and structure of the C-shell, the edge-cutting process requires separate design. If a notch is left during blanking, subsequent stretching processes will cause side deformation, resulting in dimensional and shape distortions. Therefore, a rough notch is usually cut using a side-cutting process to allow for more precise edge-cutting and other processing operations, ensuring the casing's dimensional accuracy and shape meet design requirements.

[0003] Currently, the traditional die cutting edge layout for side-cutting of C-part housings either concentrates all cutting edges in the upper die or places them all in the lower die. When using a full lower die cutting edge layout, the lower die cutting edges need to be designed as a semi-enclosed shape, resulting in a large cutting edge span, weak structural strength, and a tendency for scrap to get stuck during stamping. On the other hand, when using a full upper die cutting edge layout, if the lower die punch jams or withdraws slowly, the die punch and cutting edges are very likely to break and be damaged during the forced demolding process of the press, seriously affecting production efficiency and die life. Utility Model Content

[0004] In view of the technical problems existing in the prior art, this utility model provides a side-cutting mold for a laptop casing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A side-cutting die for a laptop casing, used for side-cutting the sidewall of a C-piece casing, the sidewall having a punching area, including:

[0007] The upper mold includes an upper mold assembly, a plurality of elastic mechanisms disposed within the upper mold assembly, an inner ejector plate connected to the upper mold assembly, and an upper mold cutting edge disposed on one side of the inner ejector plate. The inner ejector plate is capable of reciprocating along the height direction of the upper mold assembly, and the elastic mechanisms are used to reset the inner ejector plate.

[0008] The lower die includes a lower die assembly, a contour plate disposed on the upper end of the lower die assembly for supporting the housing, a plurality of positioning members disposed on the contour plate, a drive assembly disposed on the lower end of the contour plate, a side cutting assembly distributed on one side of the drive assembly, and two spaced lower die cutting edges. The side cutting assembly includes a lower die punch adapted to the shape of the area to be punched. One end of the lower die punch is connected to the drive assembly, and the other opposite end is adjacent to the lower die cutting edge.

[0009] In the mold-closed state, the inner ejector plate is pressed against the upper end of the housing, the upper die cutting edge can abut against the outside of the upper part of the housing to be punched, the lower die punch is located inside the housing to be punched, the driving component can drive the lower die punch to move towards the housing until the housing to be punched is cut off, and the two lower die cutting edges can abut against the two sides outside the housing to be punched during the punching process.

[0010] Furthermore, the upper mold assembly includes an upper mold base, an upper pad, and an upper template arranged sequentially from top to bottom. The upper template has a mounting cavity in the middle for mounting the inner ejector plate. A plurality of guide slide rods are provided in the mounting cavity. The inner ejector plate is slidably connected to the guide slide rods, so that the inner ejector plate can reciprocate along the guide slide rods.

[0011] The lower end of the upper template is provided with spaced-apart clearance cavities that correspond one-to-one with the cutting edge of the lower mold. The clearance cavities are used to avoid the cutting edge of the lower mold when the mold is closed.

[0012] Furthermore, the shape of the bottom surface of the inner ejector plate is adapted to the shell, and when the mold is in the open state, the height of the bottom surface of the inner ejector plate is lower than the height of the bottom surface of the upper mold cutting edge.

[0013] Furthermore, the elastic mechanism includes a plurality of mounting slots and a return spring installed in each mounting slot. The mounting slots extend vertically from the bottom surface of the upper pad towards the upper mold base, and one end of the return spring abuts against the inner release plate.

[0014] Furthermore, the positioning element is a positioning pin.

[0015] Furthermore, the lower mold assembly includes a lower template, a lower stripper plate, a lower pad plate, a lower mold base, a lower support foot, and a lower support plate arranged sequentially from top to bottom. The lower template is located at the lower end of the contour plate, and the lower template has an installation notch that can accommodate the lower mold punch portion.

[0016] A plurality of springs are provided between the lower ejector plate and the lower pad plate, and the lower ejector plate is guided to reciprocate along the height direction of the guide rods by a plurality of guide rods. When the mold is closed, the springs are compressed so that the drive assembly can drive the lower mold punch.

[0017] Furthermore, the two drive components are spaced apart. Each drive component includes a insert, a transmission push block distributed on one side of the insert, and a slide groove disposed on the lower template with one end adjacent to and communicating with the mounting notch for fitting the transmission push block. One end of the insert is connected to the lower ejector plate, while the other opposite end can pass through the lower template. The passing end of the insert has an insert bevel surface.

[0018] The transmission push block has a push block inclined wedge surface at one end near the insert blade, which can cooperate with the inclined wedge surface of the insert blade, while the end away from the insert blade can abut against the lower die punch to drive the lower die punch to move away from the mounting notch to complete the processing of the area to be punched.

[0019] Furthermore, the bottom surface of the slide groove is provided with a U-shaped limiting groove, the opening end of the limiting groove is close to the lower die punch, and the bottom surface of the transmission push block is provided with a limiting block that matches the limiting groove.

[0020] Furthermore, the side-cutting assembly also includes a pressure block disposed on the outside of the lower die punch and distributed between the two lower die cutting edges, and a reset mechanism for resetting the lower die punch. The pressure block has a protrusion on the side near the lower die punch, and a recessed groove for engaging and connecting the protrusion is provided at the corresponding position of the lower die punch.

[0021] The reset mechanism includes a plurality of first mounting holes formed on the lower die punch, a plurality of through cavities extending laterally through the pressure block, a plurality of return springs installed in the through cavities one by one, and a plurality of abutment blocks. The positions of the through cavities correspond one-to-one with the positions of the first mounting holes. One end of the return spring is installed in the first mounting hole, and the other end passes through the through cavity. Abutment blocks for pressing against the return springs are also installed in the through cavities.

[0022] When the mold is open, the protrusion partially enters the recessed groove but does not abut against it. When the mold is closed, the lower die punch moves outward so that the protrusion can be fully embedded along the depth direction of the recessed groove.

[0023] Furthermore, the lower die punch is slidably connected to the lower stripper plate via a slide rail. The lower die punch has a guide portion on each side. The two lower die cutting edges are provided with sliding portions that correspond to and slide with the guide portions. The bottom surface of the contour plate is provided with a first avoidance portion for avoiding the lower die punch.

[0024] The top surface of the lower die punch includes a first horizontal surface distributed near the lower die cutting edge, an inclined surface connected to the end of the first horizontal surface away from the lower die cutting edge, and a second horizontal surface connected to the inclined surface. The height of the first horizontal surface is higher than the height of the second horizontal surface.

[0025] When the mold is opened, the first horizontal plane is adjacent to the sliding part and located on one side of the sliding part; when the mold is closed, the guide parts on both sides of the lower mold punch slide into the corresponding sliding parts, and the lower mold cutting edge can abut against the first horizontal plane on one side of the contour plate, and the upper mold cutting edge is located between the two lower mold cutting edges and also contacts the first horizontal plane.

[0026] In summary, the beneficial effects of this utility model are as follows: 1. It overcomes the structural defects of the full-bottom die cutting edge and improves the durability of the cutting edge. Traditional full-bottom die cutting edges need to be designed as semi-enclosed shapes, which have problems such as large span, weak strength, and easy chipping, and are prone to scrap jamming during stamping. This mold separates the cutting edge into an upper die cutting edge (corresponding to the non-punching upper area) and a lower die cutting edge (corresponding to the non-punching side area) according to the area to be punched. After the mold is closed, they are assembled into a complete cutting frame: the lower die cutting edge does not need to bear the stress of the semi-enclosed structure, the structural strength is greatly improved, and the deformation and chipping of the cutting edge due to excessive force during punching are effectively avoided; at the same time, the separate layout of the upper and lower die cutting edges provides sufficient scrap channels, and the scrap can fall naturally along the gap between the cutting edges after punching, completely solving the problem of scrap jamming in traditional molds and reducing downtime for cleaning. 2. It avoids the risk of punch breakage in the full-top die cutting edge and extends the mold life. In traditional full-top die cutter layouts, when the lower die punch jams or retracts slowly, forced demolding by the press can easily lead to breakage of the punch and cutter. This die is optimized through a "cutting frame + directional punching" design: the upper and lower die cutters first assemble to form a stable punching boundary, and the lower die punch only needs to move within the frame along a preset trajectory (double constraint of slide rail + guide section), resulting in more stable force direction and more controllable stroke; combined with a reset mechanism (return spring + limit groove), the punch can accurately reset after the die is opened, avoiding jamming; and the elastic holding of the inner ejector plate and the yielding design of the lower ejector plate reduce hard contact between the punch and cutter, significantly reducing the risk of punch breakage, extending the service life of the core components of the die (punch and cutter), and reducing the cost of die maintenance and replacement. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the shell to be side-cut in this utility model.

[0028] Figure 2 yes Figure 1 The main view.

[0029] Figure 3 This is a schematic diagram of the structure of a side-cutting mold for a laptop casing provided in this utility model.

[0030] Figure 4 yes Figure 3 Vertical sectional view.

[0031] Figure 5 yes Figure 4 A magnified view of part A in the middle.

[0032] Figure 6 This is a schematic diagram of the upper mold in the closed state in this utility model.

[0033] Figure 7 This is a schematic diagram of the upper mold in the open state in this utility model.

[0034] Figure 8 This is a schematic diagram of the structure of the lower mold supporting the shell in this utility model.

[0035] Figure 9 This is a schematic diagram of the lower mold in this utility model.

[0036] Figure 10 This is a structural schematic diagram of the lower mold without the template plate installed in this utility model.

[0037] Figure 11 yes Figure 10 A magnified view of a section at point B in the middle.

[0038] Figure 12 This utility model Figure 10 Top view of the lower die plate without the lower die punch installed.

[0039] Figure 13 This is a three-dimensional structural diagram of the lower die punch in this utility model.

[0040] In the diagram, 100-C part housing, 110-side wall, 111-area to be punched, 112-non-punching upper area, 113-non-punching side area, 120-positioning hole, 200-upper die assembly, 210-upper die base, 220-upper pad, 230-upper template, 240-guide slide rod, 250-avoidance cavity, 300-inner stripper plate, 400-upper die cutting edge, 500-lower die assembly, 510-lower template, 511-installation notch, 520-lower stripper plate, 530-lower pad, 540-lower die base, 550-lower foot, 560-lower support plate, 570-spring, 580-guide rod, 600 - Contouring plate, 610- Positioning component, 620- First clearance part, 700- Drive assembly, 710- Inserting knife, 711- Inserting knife inclined wedge surface, 720- Transmission push block, 730- Slide groove, 731- Limiting groove, 800- Side cutting assembly, 810- Lower die punch, 811- Recessed groove, 812- Slide rail, 813- Guide part, 814- First horizontal surface, 815- Inclined surface, 816- Second horizontal surface, 820- Pressure block, 821- Protrusion, 830- Reset mechanism, 831- First mounting hole, 832- Return spring, 833- Holding block, 900- Lower die cutting edge, 910- Sliding part. Detailed Implementation

[0041] The present invention will be further illustrated below with reference to specific figures.

[0042] Please see Figure 1 and Figure 2 The C-part housing 100 to be processed (hereinafter referred to as the housing) has side walls 110 surrounding it. One of the side walls 110 has a notch, and a punching area 111 is distributed within the notch. The upper part of the punching area 111 is defined as a non-punching upper area 112, and the two sides of the punching area 111 are defined as non-punching side areas 113. The C-part housing 100 is also provided with a plurality of positioning holes 120 penetrating the C-part housing 100.

[0043] Please see Figure 3This utility model provides a side-cutting mold for a laptop computer casing, used for side-cutting the sidewall 110 of a C-part casing 100. The side-cutting mold includes an upper mold and a lower mold that cooperates with the upper mold. The upper mold includes an upper mold assembly 200, a plurality of elastic mechanisms disposed within the upper mold assembly 200, an inner ejector plate 300 connected to the upper mold assembly 200, and an upper mold cutting edge 400 disposed on one side of the inner ejector plate 300. The inner ejector plate 300 can reciprocate along the height direction of the upper mold assembly 200, and the elastic mechanisms are used to reset the inner ejector plate 300. The lower die includes a lower die assembly 500, a contour plate 600 disposed on the upper end of the lower die assembly 500 for supporting the housing, a plurality of positioning elements 610 disposed on the contour plate 600, a drive assembly 700 disposed on the lower end of the contour plate 600, a side-cutting assembly 800 distributed on one side of the drive assembly 700, and two spaced-apart lower die cutters 900. The side-cutting assembly 800 includes a lower die punch 810 adapted to the shape of the area 111 to be punched. One end of the lower die punch 810 is connected to the drive assembly 700, and the other opposite end is adjacent to the lower die cutter 900. Please refer to [link to relevant documentation]. Figure 4 and Figure 5 In the mold-closed state, the inner ejector plate 300 presses against the upper end of the housing. The upper die cutting edge 400 abuts against the outer part of the upper portion of the housing's area to be punched 111 (i.e., the non-punching upper area 112). The lower die punch 810 is located inside the housing's area to be punched 111. The drive assembly 700 can drive the lower die punch 810 to move towards the housing until it cuts off the housing's area to be punched 111. During the punching process, the two lower die cutting edges 900 abut against the outer sides of the housing's area to be punched 111 (i.e., the non-punching side areas 113). Please refer to [link to relevant documentation]. Figure 8The housing is initially fixed on the contour plate 600 by the positioning pin 610. During mold closing, the upper mold moves closer to the lower mold. Before the drive assembly 700 drives the lower die punch 810 to perform side cutting, the upper die cutting edge 400 abuts against the non-punching upper area 112, while the lower die cutting edge 900 abuts against the non-punching side area 113, exposing the area to be punched 111. The cutting edges are no longer all located on either the upper or lower mold, but are designed to correspond to the area to be punched 111, with the upper die cutting edge 400 distributed on the upper mold and the lower die cutting edge 900 distributed on the lower mold. After mold closing, the upper die cutting edge 400 and the lower die cutting edge 900 can cooperate to form a complete cutting edge with a shape that matches the area to be punched 111, and then cooperate with the lower die punch 810 to complete the rough side cutting. Abandoning the traditional layout of a semi-enclosed cutting edge in the lower die or a single cutting edge in the upper die, the cutting edges are split and set separately in the upper and lower dies. The upper die cutting edge 400 does not need to bear the overall punching force, and the lower die cutting edge 900 also avoids the span problem of the semi-enclosed structure, greatly improving the structural strength of the individual cutting edge, effectively preventing the cutting edge from chipping or deforming due to excessive force during punching, and extending the service life of the cutting edge. The upper die cutting edge 400 and the lower die cutting edge 900 are first assembled to form a stable "cutting frame". The lower die punch 810 only needs to push the material to be punched within the frame to complete the separation. The force direction of the lower die punch 810 is more stable and the stroke is more controllable, reducing the wear of the core components of the die and extending the service life of the overall die.

[0044] The upper mold assembly 200 includes, from top to bottom, an upper mold base 210, an upper pad 220, and an upper template 230. The upper template 230 has a mounting cavity in its center for mounting an inner ejector plate 300, and several guide rods 240 are provided within the mounting cavity. The inner ejector plate 300 is slidably connected to the guide rods 240, allowing the inner ejector plate 300 to reciprocate along the guide rods 240. The lower end of the upper template 230 has spaced-apart clearance cavities 250, each corresponding to a lower mold cutting edge 900. These clearance cavities 250 are used to avoid the lower mold cutting edge 900 during mold closing. Each layer of components has a clearly defined function: the upper mold base 210 is responsible for fixation; the upper pad 220 provides cushioning and protection; and the upper template 230 supports the core working components, with a layered structure enhancing rigidity.

[0045] Please see Figure 6 and Figure 7The inner ejector plate 300's bottom surface shape is adapted to the shell, ensuring uniform force distribution over a large area. This prevents plastic deformation or indentation of the shell (especially the thin-walled C-part shell 100) due to excessive local pressure, protecting the shell's surface quality and original structural precision. In the open mold state, the height of the inner ejector plate 300's bottom surface is lower than the height of the upper mold cutting edge 400, achieving a sequence of pressing first, then cutting edge engagement. During mold closing, the upper mold moves downwards. Because the inner ejector plate 300's bottom surface is lower, it contacts the shell before the upper mold cutting edge 400 and applies pressure, firmly pressing the shell onto the lower contour plate 600. At this point, the shell is completely fixed, preventing positional displacement due to workpiece loosening during subsequent contact or punching by the upper mold cutting edge 400. If the inner ejector plate 300 is at the same height as or higher than the upper die cutting edge 400, the upper die cutting edge 400 may contact the housing first when the mold is closed. At this time, the workpiece has not been fully pressed, and the housing is easily displaced due to the thrust of the cutting edge, or even the cutting edge collides with the non-punching area of ​​the housing, resulting in unnecessary scratches or deformation.

[0046] The elastic mechanism includes several mounting slots and corresponding return springs installed in the mounting slots. The mounting slots extend vertically from the bottom surface of the upper pad 220 towards the upper mold base 210. One end of the return spring abuts against the inner ejector plate 300, while the other end is installed in the mounting slot. During mold closing, the inner ejector plate 300 first contacts the housing and is pushed upward. At this time, the inner ejector plate 300 compresses the return spring in the mounting slot. The reaction force generated when the return spring is compressed is converted into a continuous holding force of the inner ejector plate 300 on the housing. After punching is completed, the upper mold moves upward (mold opening), the downward pressure on the inner ejector plate 300 disappears, and the compressed return spring releases its elastic force, pushing the inner ejector plate 300 downward along the guide slide 240 until it returns to the mold opening state: that is, the bottom surface of the inner ejector plate 300 is lower than the initial position of the bottom surface of the upper mold cutting edge 400. This automatic reset function requires no additional power (such as cylinders or motors), which simplifies the mold structure and quickly frees up space above the housing, making it easier for operators or automated equipment to pick up and put down workpieces, thus improving production efficiency.

[0047] Please see Figure 9The lower die assembly 500 includes, from top to bottom, a lower template 510, a lower stripper plate 520, a lower pad plate 530, a lower die base 540, a lower pad foot 550, and a lower support plate 560. The lower template 510 is located at the lower end of the contour plate 600. The lower template 510 has an installation notch 511 that can accommodate part of the lower die punch 810. The lower template 510 is directly connected to the contour plate 600 that supports the housing. The installation notch 511 is used to accommodate the lower die punch 810, which provides initial positioning for the lower die punch 810, prevents the lower die punch 810 from shifting, and limits the lateral sway of the lower die punch 810, ensuring that the lower die punch 810 moves along a preset trajectory during subsequent side cutting, thus ensuring the accuracy of the cut on the side wall 110 of the housing. Several springs 570 are provided between the lower ejector plate 520 and the lower backing plate 530, and the lower ejector plate 520 is guided to reciprocate along the height direction of the guide rods 580 by several guide rods 580. When the mold is closed, the springs 570 are compressed, enabling the drive assembly 700 to drive the lower die punch 810. When the upper die opens upward, the compressed springs 570 release their elasticity, pushing the lower ejector plate 520 upward along the guide rods 580 to return to its initial position, preparing for the next mold closing and punching, and improving the continuous operation efficiency of the mold.

[0048] Please see Figure 10 and Figure 11 Two drive components 700 are spaced apart. Each drive component 700 includes a insert 710, a transmission pusher 720 distributed on one side of the insert 710, and a groove 730 disposed on the lower template 510, one end of which is adjacent to and communicates with the mounting notch 511 for assembling the transmission pusher 720. One end of the insert 710 is connected to the lower ejector plate 520, while the other opposite end can pass through the lower template 510. The passing end of the insert 710 has an insert wedge surface 711. The end of the transmission pusher 720 near the insert 710 has a pusher wedge surface that can cooperate with the insert wedge surface 711, while the end away from the insert 710 can abut against the lower die punch 810 to drive the lower die punch 810 to move away from the mounting notch 511 to complete the processing of the area 111 to be punched. In the open mold state, several springs 570 push the lower ejector plate 520 to reset, causing the insert cutter's inclined wedge surface 711 to move away from the push block's inclined wedge surface. The bottom surface of the contour plate 600 is provided with a second clearance part to avoid the insert cutter 710. When the mold is closed, the upper mold applies downward pressure to push the lower ejector plate 520 to compress the springs 570, and the insert cutter 710 connected to the lower ejector plate 520 moves accordingly (vertically). At this time, the inclined wedge surface of the insert cutter 710 contacts the inclined wedge surface of the transmission push block 720. Through the guiding effect of the inclined surface, the vertical downward force of the insert cutter 710 is converted into a force that pushes the transmission push block 720 to move horizontally along the slide 730. The transmission push block 720 then transmits the horizontal force to the lower mold punch 810, driving the lower mold punch 810 to move away from the mounting notch 511 (i.e., towards the housing to be punched area 111), finally completing the side cutting process.

[0049] The bottom surface of the slide groove 730 is provided with a U-shaped limiting groove 731. The opening end of the limiting groove 731 is close to the lower die punch 810. The bottom surface of the transmission push block 720 is provided with a limiting block that matches the limiting groove 731, which forcibly limits the movement trajectory of the transmission push block 720 and avoids deviation and misalignment.

[0050] The side-cutting assembly 800 also includes a pressure block 820 disposed outside the lower die punch 810 and distributed between the two lower die cutting edges 900, and a reset mechanism 830 for resetting the lower die punch 810. The pressure block 820 has a protrusion 821 on the side near the lower die punch 810, and a recessed groove 811 for engaging and connecting the protrusion 821 is provided at the corresponding position on the lower die punch 810. The reset mechanism 830 includes a plurality of first mounting holes 831 formed on the lower die punch 810, a plurality of through cavities extending laterally through the pressure block 820, a plurality of return springs 832 installed one-to-one in the through cavities, and a plurality of abutment blocks 833. The positions of the through cavities correspond one-to-one with the positions of the first mounting holes 831. One end of the return spring 832 is installed in the first mounting hole 831, and the other end passes through the through cavity. Abutment blocks 833 for pressing against the return spring 832 are also installed in the through cavity. The return spring 832 causes the lower die punch 810 to return to its original position in the open state, while the limiting groove 731 provided in the slide 730 regulates the return stroke of the lower die punch 810. In the open state, the protrusion 821 is partially embedded in the recessed groove 811, but the two do not form a tight fit and a certain gap remains. When the mold is closed, as the lower die punch 810 moves outward, the protrusion 821 sinks down and completely fits into the recessed groove 811, ultimately forming a tight fit. When the mold is closed, the lower die punch 810 moves outward (for side cutting), and the protrusion 821 then "completely fits and abuts" against the recessed groove 811. At this time, the concave and convex structure forms a "rigid positioning," strictly constraining the lower die punch 810 to move only along the preset side cutting direction, preventing the lower die punch 810 from moving up and down or tilting left and right due to force. The core function of the reset mechanism 830 (return spring 832, first mounting hole 831, and abutment block 833) is to pull the lower die punch 810 back from the "side cutting station" to the "initial station" after the mold is opened, in preparation for the next side cutting action when the mold is closed, and to avoid the mold jamming due to the punch not being able to return to its original position.

[0051] Please see Figure 12 and 13The lower die punch 810 is slidably connected to the lower ejector plate 520 via a slide rail 812. The lower die punch 810 has a guide portion 813 on each side, and both lower die cutting edges 900 are provided with sliding portions 910 that correspond to and slide in conjunction with the guide portions 813. The bottom surface of the contour plate 600 is provided with a first clearance portion 620 to avoid the lower die punch 810. The double-guide structure of the lower die punch 810 (the cooperation of the slide rail 812, guide portions 813, and sliding portions 910) ensures the displacement accuracy of the lower die punch 810.

[0052] Please continue reading. Figure 13 The top surface of the lower die punch 810 includes a first horizontal surface 814 distributed near the lower die cutter 900, an inclined surface 815 connected to the end of the first horizontal surface 814 away from the lower die cutter 900, and a second horizontal surface 816 connected to the inclined surface 815. The height of the first horizontal surface 814 is higher than the height of the second horizontal surface 816. When the die is opened, the first horizontal surface 814 is adjacent to the sliding part 910 and located on one side of the sliding part 910. When the die is closed, the guide parts 813 on both sides of the lower die punch 810 slide into the corresponding sliding parts 910, and the lower die cutter 900 can abut against the first horizontal surface 814 on one side of the contour plate 600. The upper die cutter 400 is located between the two lower die cutters 900 and also contacts the first horizontal surface 814, but the upper die cutter 400 does not interfere with the movement of the lower die punch 810. The upper die cutting edge 400 is located between the two lower die cutting edges 900 and is in contact with the first horizontal surface 814. However, the second horizontal surface 816 is lower than the first horizontal surface 814. This design allows for "longitudinal space" to be reserved for the lateral movement of the lower die punch 810 while the upper die cutting edge 400 is in contact with the lower die punch 810. (When the punch moves, the upper die cutting edge 400 only slides in contact with the flat first horizontal surface 814 and will not be stuck by the second horizontal surface 816 or the inclined surface 815). This achieves coordinated action of "upper die positioning and lower die movement punching" without interference. The inclined surface 815 between the first horizontal surface 814 and the second horizontal surface 816 can prevent sharp steps from appearing on the top surface of the punch. On the one hand, this reduces stress concentration during punching (preventing the punch from cracking), and on the other hand, it can prevent the material to be processed from getting stuck at the step (especially for flexible or thin materials), ensuring smooth feeding. The distribution of the upper die cutting edge 400 and the lower die cutting edge 900 leaves enough space for waste material to pass through, avoiding material jamming.

[0053] The working process of this side-cutting die is as follows: The C-part housing 100 to be processed (with side wall notches, punching area 111, and positioning holes 120) is placed on the lower die's contour plate 600. The positioning piece 610 on the contour plate 600 is inserted into the positioning hole 120 of the housing to achieve initial fixation of the housing, ensuring that the punching area 111 of the housing corresponds to the lower die punch 810, the upper die cutting edge 400, and the lower die cutting edge 900. The upper die moves towards the lower die under the drive of the punch press. Since the bottom surface of the inner ejector plate 300 is lower when the die is opened, the inner ejector plate 300 contacts the upper end surface of the housing first during the downward movement of the upper die. As the upper die continues to move downward, the inner ejector plate 300 moves upward along the guide slide rod 240 under the reaction force of the housing, compressing the return spring in the upper die assembly 200. The reaction force of the return spring is converted into a continuous and uniform holding force of the inner ejector plate 300 on the housing, firmly fixing the housing on the contour plate 600 (to prevent subsequent punching displacement). As the upper die continues to descend, the inner ejector plate 300 is compressed to its limit. The upper die cutting edge 400 then moves to the upper outside of the area 111 to be punched in the housing and presses against it (corresponding to the non-punching upper area 112). At the same time, the lower die cutting edge 900 presses against the outer sides of the area 111 to be punched in the housing (corresponding to the non-punching side area 113). At this time, the upper die cutting edge 400 and the lower die cutting edge 900 combine to form a complete cutting frame that matches the shape of the area 111 to be punched, exposing only the area 111 to be punched, thus defining a precise boundary for subsequent punching. When the upper die descends to near the closing position with the lower die, the pressure of the upper die is transmitted to the lower ejector plate 520, pushing the lower ejector plate 520 downward along the guide rod 580, compressing the spring 570 between the lower ejector plate 520 and the lower pad plate 530; the insert 710 connected to the lower ejector plate 520 moves accordingly, passes through the lower die plate 510 and approaches the transmission push block 720, until the inclined wedge surface of the insert 710 contacts the inclined wedge surface of the push block 720. Through the inclined guide effect, the inclined wedge surface of the insert 710 and the inclined wedge surface of the push block convert the vertical downward movement of the insert 710 into the horizontal movement of the transmission push block 720 along the slide groove 730. When the transmission push block 720 moves horizontally, the end away from the insert 710 presses against the lower die punch 810, pushing the lower die punch 810 to move towards the direction of the punching area 111 of the housing. After the lower die punch 810 contacts the area 111 to be punched on the housing, under the limitation of the complete cutting frame (upper and lower die cutting edges 900), the area 111 to be punched is cut off from the side wall 110 of the housing; at the same time, the space reserved by the upper and lower die cutting edges 900 allows the waste material to fall naturally, avoiding material jamming.

[0054] This side-cutting die addresses two key issues: 1. It overcomes the structural defects of the 900mm lower die cutter edge, improving its durability. Traditional 900mm lower die cutters require a semi-enclosed design, resulting in large spans, weak strength, and susceptibility to chipping, as well as material jamming during stamping. This die separates the cutter edge into an upper die cutter edge 400 (corresponding to the non-punching upper area 112) and a lower die cutter edge 900 (corresponding to the non-punching side area 113) according to the area to be punched 111. After mold closing, they form a complete cutting frame. The lower die cutter edge 900 does not need to bear the stress of the semi-enclosed structure, significantly improving structural strength and effectively preventing die deformation and chipping due to excessive force during punching. Simultaneously, the separate layout of the upper and lower die cutters 900 provides ample waste material channels, allowing waste to fall naturally along the gaps between the cutters after punching, completely solving the problem of waste jamming in traditional dies and reducing downtime for cleaning. 2. It avoids the risk of punch breakage in the 400mm upper die cutter edge, extending the die's lifespan. In traditional full-top die cutter layouts (400mm), if the lower die punch 810 jams or retracts slowly, forced demolding by the press can easily lead to breakage of the punch and cutter. This die is optimized through a "cutting frame + directional punching" design: the upper and lower die cutters 900 first assemble to form a stable punching boundary, and the lower die punch 810 only needs to move within the frame along a preset trajectory (double constraint of slide rail 812 + guide part 813), resulting in more stable force direction and more controllable stroke; with the reset mechanism 830 (return spring 832 + limit groove 731), the punch can be accurately reset after mold opening, avoiding jamming; and the elastic holding of the inner ejector plate 300 and the yielding design of the lower ejector plate 520 reduce hard contact between the punch and cutter, significantly reducing the risk of punch breakage, extending the service life of the core components of the die (lower die punch 810, cutter), and reducing the cost of die maintenance and replacement.

[0055] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structure made using the contents of this utility model specification and drawings, whether directly or indirectly applied to other related technical fields, shall also be within the patent protection scope of this utility model.

Claims

1. A side-cutting mold for a laptop casing, used for side-cutting the sidewall of a C-piece casing, the sidewall having a punching area, characterized in that, include: The upper mold includes an upper mold assembly, a plurality of elastic mechanisms disposed within the upper mold assembly, an inner ejector plate connected to the upper mold assembly, and an upper mold cutting edge disposed on one side of the inner ejector plate. The inner ejector plate is capable of reciprocating along the height direction of the upper mold assembly, and the elastic mechanisms are used to reset the inner ejector plate. The lower die includes a lower die assembly, a contour plate disposed on the upper end of the lower die assembly for supporting the housing, a plurality of positioning members disposed on the contour plate, a drive assembly disposed on the lower end of the contour plate, a side cutting assembly distributed on one side of the drive assembly, and two spaced lower die cutting edges. The side cutting assembly includes a lower die punch adapted to the shape of the area to be punched. One end of the lower die punch is connected to the drive assembly, and the other opposite end is adjacent to the lower die cutting edge. In the mold-closed state, the inner ejector plate is pressed against the upper end of the housing, the upper die cutting edge can abut against the outside of the upper part of the housing to be punched, the lower die punch is located inside the housing to be punched, the driving component can drive the lower die punch to move towards the housing until the housing to be punched is cut off, and the two lower die cutting edges can abut against the two sides outside the housing to be punched during the punching process.

2. The laptop casing side-cutting mold according to claim 1, characterized in that: The upper mold assembly includes an upper mold base, an upper pad, and an upper template arranged sequentially from top to bottom. The upper template has a mounting cavity in the middle for mounting the inner ejector plate. A plurality of guide slide rods are provided in the mounting cavity. The inner ejector plate is slidably connected to the guide slide rods, so that the inner ejector plate can reciprocate along the guide slide rods. The lower end of the upper template is provided with spaced-apart clearance cavities that correspond one-to-one with the cutting edge of the lower mold. The clearance cavities are used to avoid the cutting edge of the lower mold when the mold is closed.

3. The laptop casing side-cutting mold according to claim 2, characterized in that: The shape of the bottom surface of the inner ejector plate is adapted to the shell. When the mold is in the open state, the height of the bottom surface of the inner ejector plate is lower than the height of the bottom surface of the upper mold cutting edge.

4. The laptop casing side-cutting mold according to claim 2, characterized in that: The elastic mechanism includes several mounting slots and a setback spring installed in each mounting slot. The mounting slots extend vertically from the bottom surface of the upper pad towards the upper mold base, and one end of the setback spring abuts against the inner release plate.

5. The laptop casing side-cutting mold according to claim 1, characterized in that: The positioning component is a positioning pin.

6. The laptop casing side-cutting mold according to claim 1, characterized in that: The lower mold assembly includes, from top to bottom, a lower template, a lower stripper plate, a lower pad plate, a lower mold base, a lower pad foot, and a lower support plate. The lower template is located at the lower end of the contour plate and has an installation notch that can accommodate the lower mold punch portion. A plurality of springs are provided between the lower ejector plate and the lower pad plate, and the lower ejector plate is guided to reciprocate along the height direction of the guide rods by a plurality of guide rods. When the mold is closed, the springs are compressed so that the drive assembly can drive the lower mold punch.

7. The laptop casing side-cutting mold according to claim 6, characterized in that: The two drive components are spaced apart. Each drive component includes a insert, a transmission push block distributed on one side of the insert, and a groove provided on the lower template with one end adjacent to and communicating with the mounting notch for fitting the transmission push block. One end of the insert is connected to the lower release plate, while the other opposite end can pass through the lower template. The passing end of the insert has an insert bevel surface. The transmission push block has a push block inclined wedge surface at one end near the insert blade, which can cooperate with the inclined wedge surface of the insert blade, while the end away from the insert blade can abut against the lower die punch to drive the lower die punch to move away from the mounting notch to complete the processing of the area to be punched.

8. The laptop casing side-cutting mold according to claim 7, characterized in that: The bottom surface of the slide groove is provided with a U-shaped limiting groove, the opening end of the limiting groove is close to the lower die punch, and the bottom surface of the transmission push block is provided with a limiting block that matches the limiting groove.

9. The laptop casing side-cutting mold according to claim 6, characterized in that: The side-cutting assembly also includes a pressure block disposed on the outside of the lower die punch and distributed between the two lower die cutting edges, and a reset mechanism for resetting the lower die punch. The pressure block has a protrusion on the side near the lower die punch, and a recessed groove for engaging and connecting the protrusion is provided at the corresponding position of the lower die punch. The reset mechanism includes a plurality of first mounting holes formed on the lower die punch, a plurality of through cavities extending laterally through the pressure block, a plurality of return springs installed in the through cavities one by one, and a plurality of abutment blocks. The positions of the through cavities correspond one-to-one with the positions of the first mounting holes. One end of the return spring is installed in the first mounting hole, and the other end passes through the through cavity. Abutment blocks for pressing against the return springs are also installed in the through cavities. When the mold is open, the protrusion partially enters the recessed groove but does not abut against it. When the mold is closed, the lower die punch moves outward so that the protrusion can be fully embedded along the depth direction of the recessed groove.

10. The notebook computer casing side-cutting mold according to any one of claims 6-9, characterized in that: The lower die punch is slidably connected to the lower stripper plate via a slide rail. The lower die punch has a guide portion on each side. The two lower die cutting edges are provided with sliding portions that correspond to and slide with the guide portions. The bottom surface of the contour plate is provided with a first avoidance portion for avoiding the lower die punch. The top surface of the lower die punch includes a first horizontal surface distributed near the lower die cutting edge, an inclined surface connected to the end of the first horizontal surface away from the lower die cutting edge, and a second horizontal surface connected to the inclined surface. The height of the first horizontal surface is higher than the height of the second horizontal surface. When the mold is opened, the first horizontal plane is adjacent to the sliding part and located on one side of the sliding part; when the mold is closed, the guide parts on both sides of the lower mold punch slide into the corresponding sliding parts, and the lower mold cutting edge can abut against the first horizontal plane on one side of the contour plate, and the upper mold cutting edge is located between the two lower mold cutting edges and also contacts the first horizontal plane.

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