Water gap stamping die

Abstract

The utility model relates to the technical field of stamping dies, in particular to a water gap stamping die. The water gap stamping die comprises a lower die base, an upper die base and a cutting piece. The lower die base is used for containing a workpiece, and a blanking opening is formed in the top face of the lower die base and used for discharging water gap waste of the workpiece. The upper die base is located on the top of the lower die base. The cutting piece is arranged on the upper die base and comprises an annular cutting part, the annular cutting part is located between the upper die base and the lower die base, and the annular cutting part corresponds to the blanking opening; the upper die base can move relative to the lower die base in the gravity direction so as to drive the cutting piece to move, and then the annular cutting part cuts off waste at the water gap of the workpiece. According to the water gap stamping die, waste materials at the water gap of a workpiece can be more efficiently cut off, and the section formed after the workpiece is punched off can be more complete and smooth.

Description

TECHNICAL FIELD

[0001] The utility model relates to punch die technical field, especially a water gap punch die. BACKGROUND

[0002] The injection molding workpiece in the packaging material is usually formed by the special mold injection molding. These special molds need to be provided with a water gap for injecting molten plastic into the mold to finally form a semi-finished injection molding workpiece. The semi-finished injection molding workpiece needs to be punched by a punching device to break the waste at the water gap to form the final finished product.

[0003] The punching device usually includes a lower pressing seat, a jig and a cutting knife. The jig is used to install the workpiece, and the cutting knife is installed on the lower pressing seat, and the front end of the cutting knife is conical. During cutting, the lower pressing seat drives the cutting knife to move towards the jig, so that the front end of the cutting knife cuts the waste at the water gap of the injection molding workpiece.

[0004] However, in the above structure, when the conical cutting knife cuts the waste, the stress point is concentrated in the center of the waste, and then gradually spreads to the surrounding, which leads to poor cutting effect, and the injection molding part often needs to be repeatedly punched, and the punching efficiency is low. SUMMARY

[0005] The technical problem to be solved by the embodiments of the utility model lies in providing a water gap punch die to solve the problem of low punching efficiency of the water gap waste of the injection molding part in the prior art.

[0006] The water gap punch die provided by the embodiments of the utility model comprises:

[0007] A lower die seat is used to place the workpiece, and a blanking port is arranged on the top surface of the lower die seat, which is used to discharge the water gap waste of the workpiece;

[0008] An upper die seat is arranged on the top of the lower die seat;

[0009] A cutting piece is arranged on the upper die seat, and the cutting piece comprises an annular cutting part, which is arranged between the upper die seat and the lower die seat, and the annular cutting part is arranged in correspondence with the blanking port;

[0010] The upper die seat can move relative to the lower die seat in the direction of gravity to drive the cutting piece to move, so that the annular cutting part cuts the waste at the water gap of the workpiece.

[0011] In an embodiment, the annular cutting part comprises an outer side wall and an inner side wall arranged oppositely, and the inner side wall has a gradually narrowing trend in the direction away from the lower die seat.

[0012] In an embodiment, the cutting member comprises a connecting portion connected to the annular cutting portion on a side away from the lower die holder; the side of the upper die holder facing the lower die holder is provided with a mounting groove comprising a first accommodating portion and a second accommodating portion, the second accommodating portion being located on the side of the first accommodating portion facing the lower die holder, the connecting portion being accommodated in the first accommodating portion, and the annular cutting portion being arranged in the second accommodating portion, wherein the outer contour of the connecting portion is larger than the outer contour of the annular cutting portion and the second accommodating portion.

[0013] In an embodiment, a positioning assembly is further included, which comprises a positioning post and a positioning sleeve, the positioning post being arranged to extend in the direction of gravity, the positioning post being arranged on one of the upper die holder and the lower die holder, and the positioning sleeve being arranged on the other of the upper die holder and the lower die holder and facing the positioning post, so that the positioning post can be inserted into the positioning sleeve.

[0014] In an embodiment, the side of the positioning post facing the positioning sleeve has a circular arc surface.

[0015] In an embodiment, an elastic pressing assembly is further included, which comprises a pressing member and an elastic element, the pressing member being movably arranged on the side of the upper die holder facing the lower die holder in the direction of gravity, and the annular cutting portion being arranged in the pressing member, and the elastic element being arranged between the pressing member and the upper die holder, so that the pressing member can be elastically pressed on the top of the workpiece.

[0016] In an embodiment, the side of the pressing member facing the lower die holder is provided with a profiling groove, the shape of the profiling groove being matched with the shape of the workpiece.

[0017] In an embodiment, the side of the lower die holder facing the upper die holder is provided with a profiling portion having an arc surface, the blanking port being arranged at the center of the arc surface, and a plurality of positioning protrusions being arranged around the blanking port on the arc surface, the positioning protrusions being used to limit the rotation of the workpiece.

[0018] In an embodiment, the arc surface is further provided with a positioning clamping groove, one end of the positioning clamping groove being communicated with the blanking port, and the other end extending along the arc surface away from the blanking port, the clamping groove being used to limit the installation of the workpiece.

[0019] In an embodiment, a stop pressing member is further included, which is arranged on the side of the lower die holder facing the upper die holder, and the stop pressing member can abut against the upper die holder to limit the movement of the upper die holder towards the lower die holder.

[0020] Compared with the prior art, the water gap stamping die has the advantages that the water gap stamping die can cut off the waste material at the water gap of the workpiece more efficiently, and the cross section formed after the workpiece is punched off is more complete and smooth.

[0021] Specifically, the lower die seat is used for placing the workpiece, and the blanking opening of the lower die seat corresponds to the waste material position of the water gap of the workpiece, and the upper die seat can drive the cutting piece to move to the workpiece in the direction of gravity, so that the cutting piece cuts off the waste material of the water gap of the workpiece. Since the annular cutting part of the cutting piece is designed to uniformly distribute the pressure applied on the waste material, the situation that the waste material is difficult to be punched off due to uneven stress is reduced, the impact force can be more effectively transmitted to the waste material, and the punching efficiency is improved. In addition, since the annular cutting part can cut off the complete waste material, the possibility of stress concentration in the local area is reduced, so that the cross section formed after the workpiece is punched off is more complete and smooth. BRIEF DESCRIPTION OF DRAWINGS

[0022] The specific implementation of the utility model will be further described in detail below in combination with the drawings and examples, and the drawings are as follows:

[0023] Figure 1 is a perspective view of the water gap stamping die provided by the utility model embodiment, wherein the cutting piece is not in contact with the workpiece;

[0024] Figure 2 is one of side views of the water gap stamping die provided by the utility model embodiment, wherein the cutting piece is not in contact with the workpiece;

[0025] Figure 3 is Figure 2 is a cross-sectional view along the A-A line in the figure;

[0026] Figure 4 is a perspective view of the water gap stamping die provided by the utility model embodiment, wherein the cutting piece is in contact with the workpiece;

[0027] Figure 5 is one of side views of the water gap stamping die provided by the utility model embodiment, wherein the cutting piece is in contact with the workpiece;

[0028] Figure 6 is Figure 5 is a cross-sectional view along the C-C line in the figure;

[0029] Figure 7 is Figure 3 is a local enlarged view of the B position in the figure;

[0030] Figure 8 is Figure 6 is a local enlarged view of the D position in the figure;

[0031] Figure 9is a three-dimensional schematic view of a cutting piece provided by the embodiment of the utility model;

[0032] Figure 10 is a top view of the upper die holder and the lower die holder provided by the embodiment of the utility model;

[0033] Figure 11 is Figure 10 is a sectional view along the line E-E;

[0034] Figure 12 is a disassembly schematic view of the upper die holder, the elastic pressure connecting assembly and the cutting piece provided by the embodiment of the utility model;

[0035] Figure 13 is Figure 10 is a sectional view along the line F-F;

[0036] Figure 14 is an assembly schematic view of the upper die holder, the elastic pressure connecting assembly and the cutting piece provided by the embodiment of the utility model;

[0037] Figure 15 is an assembly schematic view of the lower die holder and the pressure stopping piece provided by the embodiment of the utility model;

[0038] Figure 16 is Figure 15 is a local enlarged view of G position.

[0039] The reference signs in the drawings are as follows:

[0040] 1000, a water gap stamping die;

[0041] 100, a lower die holder; 110, a blanking port; 120, a profiling part; 121, an arc surface; 121a, a positioning protrusion; 121b, a positioning clamping groove;

[0042] 200, an upper die holder; 210, a mounting groove; 211, a first containing part; 212, a second containing part; 220, an upper plate; 230, a lower plate; 240, a sliding hole; 250, a T-shaped hole;

[0043] 300, a cutting piece; 310, an annular cutting part; 311, an outer side wall; 312, an inner side wall; 313, an edge; 320, a connecting part;

[0044] 400, a positioning assembly; 410, a positioning column; 411, a circular arc surface; 420, a positioning sleeve;

[0045] 500, an elastic pressure connecting assembly; 510, a pressing piece; 511, a profiling groove; 512, an opening; 520, an elastic element; 530, a limiting guide shaft; 531, a head end; 532, a body end;

[0046] 600, a pressure stopping piece;

[0047] 2000, workpiece. DETAILED DESCRIPTION

[0048] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. Now, the preferred embodiments of the present application will be described in detail with reference to the drawings.

[0049] The water port stamping die 1000 provided by the embodiments of the present application includes a lower die seat 100, an upper die seat 200, and a cutting piece 300. Figure 1 Figure 6 The water port stamping die 1000 includes a lower die seat 100, an upper die seat 200, and a cutting piece 300. The lower die seat 100 is used for placing a workpiece 2000, and a blanking port 110 is arranged at the top surface of the lower die seat 100, which is used for discharging the water port waste of the workpiece 2000. The upper die seat 200 is located at the top of the lower die seat 100. The cutting piece 300 is arranged on the upper die seat 200, and the cutting piece 300 includes an annular cutting part 310, which is located between the upper die seat 200 and the lower die seat 100, and the annular cutting part 310 is arranged in correspondence with the blanking port 110. The upper die seat 200 can move relative to the lower die seat 100 in the direction of gravity (for example, the Z direction in the figure) to drive the cutting piece 300 to move, so as to make the annular cutting part 310 cut off the waste at the water port of the workpiece 2000. The present application can solve the problem of low stamping and cutting efficiency in the prior art. The water port stamping die 1000 can more efficiently cut off the waste at the water port of the workpiece 2000, and can also make the cross section of the workpiece 2000 after stamping and cutting more complete and smooth. Figure 1 Specifically, the lower die seat 100 is used for placing the workpiece 2000, and the blanking port 110 of the lower die seat 100 corresponds to the position of the water port waste of the workpiece 2000. The upper die seat 200 can drive the cutting piece 300 to move towards the workpiece 2000 in the direction of gravity, so as to make the cutting piece 300 cut off the water port waste of the workpiece 2000. Since the annular cutting part 310 in the cutting piece 300 is designed to uniformly distribute the pressure applied on the waste, the situation that the waste is difficult to be cut off due to uneven stress is reduced, the impact force can be more effectively transmitted to the waste, and the cutting efficiency is improved. In addition, since the annular cutting part 310 can completely cut off the waste, the possibility of stress concentration in a local area is reduced, so that the cross section of the workpiece 2000 after stamping and cutting is more complete and smooth.

[0050]

[0051] ​​It is worth mentioning that in the above scheme, after the cutting member 300 cuts off the nozzle waste of the workpiece 2000, the waste can fall into the drop opening 110, and the nozzle stamping die 1000 is also conducive to the centralized collection and cleaning of the waste. At the same time, since the nozzle stamping die 1000 can efficiently punch off the waste and ensure the flatness of the broken section, it helps to improve the yield of the workpiece 2000.

[0052] In the present application, there are many ways to set up the driving of the upper die holder 200, for example, hydraulic drive such as hydraulic cylinder; pneumatic drive such as air cylinder; of course, linear motor module can also be used for driving, which is not limited here.

[0053] Referring to Figure 7 With Figure 8 In an embodiment, the annular cutting part 310 includes an outer side wall 311 and an inner side wall 312 arranged opposite to each other, and the inner side wall 312 has a gradually narrowing trend away from the lower die holder 100. In this way, on the one hand, the edge 313 formed at the connection position of the inner side wall 312 and the outer side wall 311 is more sharp and sharp, and when the annular cutting part 310 contacts the waste, the sharp and sharp edge 313 not only can concentrate the cutting stress to the workpiece 2000, but also can reduce the surface area in contact with the workpiece 2000 during cutting, thereby reducing the cutting resistance, and finally enabling the annular cutting part 310 to more easily overcome the resistance of the workpiece 2000, achieving faster and more efficient cutting; on the other hand, the inner side wall 312 gradually narrows away from the lower die holder 100, thereby increasing the thickness of the inner side wall 312 and the outer side wall 311, so that the overall strength of the annular cutting part 310 is higher, and it is also conducive to the transmission and concentration of cutting stress at the edge 313, improving the cutting stability and durability of the annular cutting part 310.

[0054] Referring to Figures 7 to 12 In an embodiment, the cutting member 300 includes a connecting part 320 connected to the side of the annular cutting part 310 away from the lower die holder 100; the side of the upper die holder 200 facing the lower die holder 100 is provided with a mounting groove 210, the mounting groove 210 includes a first accommodating part 211 and a second accommodating part 212, the second accommodating part 212 is located on the side of the first accommodating part 211 facing the lower die holder 100, the connecting part 320 is accommodated in the first accommodating part 211, and the annular cutting part 310 is arranged in the second accommodating part 212, wherein the outer contour of the connecting part 320 is larger than the outer contour of the annular cutting part 310 and the second accommodating part 212. In this way, the cutting member 300 can be firmly connected to the upper die holder 200, the connection stability is better, and no additional parts are needed for connection during assembly, reducing the complexity and time cost of assembly and improving the assembly efficiency.

[0055] In an embodiment, the upper die holder 200 comprises an upper plate 220 and a lower plate 230, which are sequentially arranged in the direction of gravity, and together define a mounting slot 210. The upper plate 220 and the lower plate 230 are detachably connected, so that when they are separated, the connecting part 320 can be placed in the mounting slot 210, and when they are connected, the connecting part 320 is limited in position in the mounting slot 210.

[0056] Specifically, the side of the lower plate 230 facing away from the lower die holder 100 is provided with a T-shaped hole 250, which can limit the movement of the cutting part 300 in the horizontal direction (indicated by the X direction in Figure 1 ). The upper plate 220 covers the T-shaped hole 250 to limit the movement of the cutting part 300 in the vertical direction (indicated by the Y direction in Figure 1 ). Thus, the cutting part 300 is connected to the upper die holder 200.

[0057] The detachable connection between the upper plate 220 and the lower plate 230 can be achieved in many ways, such as snap connection, riveting or threaded connection, etc. In the present embodiment, one of the upper plate 220 and the lower plate 230 is provided with threaded holes, and the other is provided with through holes corresponding to the threaded holes, and screws are threaded through the through holes and screwed into the threaded holes.

[0058] Preferably, both the through holes and the threaded holes are provided with multiple ones to improve the stability of the connection. In the present embodiment, both the through holes and the threaded holes are provided with four ones, which are arranged at the corners of the upper plate 220 or the lower plate 230.

[0059] In an embodiment, the first accommodating part 211 is shaped to match the shape of the connecting part 320, the second accommodating part 212 is shaped to match the shape of the annular cutting part 310, and both the first accommodating part 211 and the connecting part 320 are cylindrical. In this way, the support and fixation of the cutting part 300 are enhanced, the stability of the connection is improved, and the outer contour of the cylindrical connecting part 320 is arc-shaped, which is smoother and reduces the friction with other components, making the assembly and disassembly process more smooth and convenient.

[0060] Referring to Figure 13In an embodiment, the nozzle stamping die 1000 further comprises a positioning assembly 400, which comprises a positioning post 410 and a positioning sleeve 420. The positioning post 410 extends in the direction of gravity and is arranged on one of the upper die seat 200 or the lower die seat 100. The positioning sleeve 420 is arranged on the other one of the upper die seat 200 or the lower die seat 100 and is opposite to the positioning post 410, so that the positioning post 410 can be inserted into the positioning sleeve 420. In this way, the positioning post 410 inserted into the positioning sleeve 420 can limit the relative position of the upper die seat 200 and the lower die seat 100, thereby ensuring that the annular cutting part 310 is aligned with the nozzle waste of the workpiece 2000, effectively ensuring the position accuracy of cutting and improving the correctness of cutting.

[0061] The connection between the positioning post 410 and the upper die seat 200 or the lower die seat 100 and the connection between the positioning sleeve 420 and the upper die seat 200 or the lower die seat 100 can be in many ways, such as plug-in, threaded connection, etc. In this application, the connection between the positioning sleeve 420 and the upper die seat 200 or the lower die seat 100 and the connection between the positioning post 410 and the upper die seat 200 or the lower die seat 100 are consistent with the connection between the cutting member 300 and the upper die seat 200, for easy disassembly and assembly.

[0062] In an embodiment, the side of the positioning post 410 facing the positioning sleeve 420 has a circular arc surface 411. In this way, the circular arc surface 411 can reduce the contact area between the positioning post 410 and the positioning sleeve 420 at the initial contact stage, thereby reducing the friction and guiding the positioning post 410 to be more smoothly placed into the positioning sleeve 420, improving the stability of the cooperation between the positioning post 410 and the positioning sleeve 420 and making the overall structure more reliable.

[0063] Referring to Figure 12 With Figure 14In an embodiment, the water gap stamping die 1000 further comprises an elastic pressing assembly 500, which comprises a pressing piece 510 and an elastic element 520. The pressing piece 510 is movably arranged on the side of the upper die seat 200 facing the lower die seat 100 in the direction of gravity, and the annular cutting part 310 is arranged through the pressing piece 510. The elastic element 520 is arranged between the pressing piece 510 and the upper die seat 200, so that the pressing piece 510 can be elastically pressed on the top of the workpiece 2000. In this way, the elastic element 520 makes the pressing piece 510 always have a tendency to move towards the lower die seat 100. Before cutting, the pressing piece 510 can abut against the workpiece 2000 first, and generate a reaction force to overcome the elastic force, so as to shorten the gap between the pressing piece 510 and the upper die seat 200. At this time, the pressing piece 510 has a certain buffer when pressing the workpiece 2000, and the workpiece 2000 is also less likely to be damaged during pressing. After the workpiece 2000 is pressed, the cutting piece 300 continues to move towards the lower die seat 100 under the action of the upper die seat 200, and penetrates through the pressing piece 510 to cut off the waste of the workpiece 2000. After the upper die seat 200 is reset, the elastic element 520 releases the energy to make the pressing piece 510 return to the original position. This cutting process can effectively ensure the position of the workpiece 2000 and improve the cutting precision.

[0064] Specifically, the elastic element 520 is a spring, and the pressing piece 510 is provided with an opening 512 in the direction of gravity. The annular cutting part 310 is located on the side of the opening 512 close to the lower die seat 100.

[0065] The elastic pressing assembly 500 and the upper die seat 200 can be connected in many ways. In this application, the elastic pressing assembly 500 further comprises a limiting guide shaft 530 movably connected to the upper die seat 200 in the vertical direction. The spring is sleeved on the limiting guide shaft 530, so that the pressing piece 510 can be movably connected to the upper die seat 200.

[0066] The limiting guide shaft 530 and the spring can be provided in multiple numbers to improve the connection stability of the pressing piece 510 and the upper die seat 200. For example, the limiting guide shaft 530 and the spring are each provided in four numbers. The four limiting guide shafts 530 are respectively arranged at the four corners around the pressing piece 510.

[0067] Referring to Figure 12 In an embodiment, the limiting guide shaft 530 comprises a head end 531 and a body end 532. The upper die seat 200 is provided with a sliding hole 240. The body end 532 is movably connected to the sliding hole 240 in the vertical direction and penetrates through the sliding hole 240 to be connected to the pressing piece 510. The outer contour of the head end 531 is larger than the outer contour of the body end 532 and the sliding hole 240, so as to limit the limiting guide shaft 530 from being separated from the sliding hole 240. In this way, the connection stability of the elastic pressing assembly 500 is better, and it is easier to install and disassemble.

[0068] Referring to Figure 14 In an embodiment, the pressing piece 510 is provided with a profiling groove 511 on the side facing the lower die seat 100, and the profiling groove 511 is shaped to match the shape of the workpiece 2000. In this way, the profiling groove 511 can increase the contact area with the top of the workpiece 2000, so that when the pressing piece 510 exerts pressure on the workpiece 2000, the workpiece 2000 is more evenly stressed and is less likely to shift position.

[0069] Referring to Figure 15 With Figure 16 In an embodiment, the lower die seat 100 is provided with a profiling portion 120 on the side facing the upper die seat 200, and the profiling portion 120 has an arc surface 121, the blanking port 110 is arranged at the center of the arc surface 121, and a plurality of positioning lugs 121a are arranged on the arc surface 121 around the blanking port 110. In this way, the positioning lugs 121a are used to limit the rotation of the workpiece 2000 relative to the lower die seat 100, which can effectively prevent unnecessary rotation or shifting of the workpiece 2000 during cutting, ensure the stability of the position of the workpiece 2000, and improve the accuracy of processing.

[0070] Referring to Figure 15 With Figure 16 In an embodiment, the arc surface 121 is further provided with a positioning clamping groove 121b, one end of the positioning clamping groove 121b communicates with the blanking port 110, and the other end extends along the arc surface 121 away from the blanking port 110, and the positioning clamping groove 121b is used to limit the installation of the workpiece 2000. In this way, the positioning clamping groove 121b can further limit the movement of the workpiece 2000 relative to the lower die seat 100, ensuring the stability during cutting, thereby effectively improving the cutting accuracy.

[0071] Referring to Figure 15 In an embodiment, the water gap stamping die 1000 further comprises a pressure stopping piece 600, which is arranged on the side of the lower die seat 100 facing the upper die seat 200, and the pressure stopping piece 600 can abut against the upper die seat 200 to limit the movement of the upper die seat 200 towards the lower die seat 100. In this way, the pressure stopping piece 600 can prevent the upper die seat 200 from being over-pressed, i.e. the upper die seat 200 moves beyond a predetermined distance relative to the lower die seat 100, thereby improving the safety of the overall structure.

[0072] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features can be replaced by equivalents; all these modifications and replacements shall fall within the protection scope of the claims of the present application.

Claims

1. A sprue stamping die, characterized in that, include: The lower mold base is used to place the workpiece. The top surface of the lower mold base is provided with a discharge port for discharging the sprue waste of the workpiece. The upper mold base is located on top of the lower mold base; A cutting component is mounted on an upper mold base. The cutting component includes an annular cutting part, which is located between the upper mold base and the lower mold base, and the annular cutting part is correspondingly arranged with the blanking port. The upper mold base can move relative to the lower mold base in the direction of gravity to drive the cutting part to move, thereby causing the annular cutting part to cut off the waste material at the sprue of the workpiece.

2. The sprue stamping die according to claim 1, characterized in that, The annular cutting section includes an outer side wall and an inner side wall arranged opposite to each other, and the inner side wall has a gradually narrowing trend in the direction away from the lower mold base.

3. The sprue stamping die according to claim 1, characterized in that, The cutting component includes a connecting portion connected to the annular cutting portion on the side away from the lower mold base; the upper mold base has a mounting groove on the side facing the lower mold base, the mounting groove includes a first receiving portion and a second receiving portion, the second receiving portion is located on the side of the first receiving portion facing the lower mold base, the connecting portion is received in the first receiving portion, and the annular cutting portion passes through the second receiving portion, wherein the outer contour of the connecting portion is larger than the outer contours of the annular cutting portion and the second receiving portion.

4. The sprue stamping die according to any one of claims 1-3, characterized in that, It also includes a positioning component, which includes a positioning post and a positioning sleeve. The positioning post extends in the direction of gravity and is installed on one of the upper mold base or the lower mold base. The positioning sleeve is installed on the other of the upper mold base or the lower mold base and is directly opposite the positioning post, so that the positioning post can be inserted into the positioning sleeve.

5. The sprue stamping die according to claim 4, characterized in that, The side of the positioning post facing the positioning sleeve has an arc surface.

6. The sprue stamping die according to any one of claims 1-3, characterized in that, It also includes an elastic pressing assembly, which includes a pressing member and an elastic element. In the direction of gravity, the pressing member is movably disposed on the side of the upper mold base facing the lower mold base, and the annular cutting portion passes through the pressing member. The elastic element is sandwiched between the pressing member and the upper mold base so that the pressing member can be elastically pressed against the top of the workpiece.

7. The sprue stamping die according to claim 6, characterized in that, The pressing component has a contour groove on the side facing the lower mold base, and the shape of the contour groove is adapted to the shape of the workpiece.

8. The sprue stamping die according to claim 1, characterized in that, The lower mold base has a contouring part on the side facing the upper mold base. The contouring part has an arc-shaped surface. The blanking port is located at the center of the arc-shaped surface. The arc-shaped surface is also provided with a number of positioning protrusions. The number of positioning protrusions are arranged around the blanking port. The positioning protrusions are used to restrict the rotation of the workpiece.

9. The sprue stamping die according to claim 8, characterized in that, The arc-shaped surface is also provided with a positioning slot. One end of the positioning slot is connected to the material discharge port, and the other end extends along the arc-shaped surface in a direction away from the material discharge port. The slot is used to limit the installation of the workpiece.

10. The sprue stamping die according to claim 1, characterized in that, It also includes a pressure-stopping component, which is installed on the side of the lower mold base facing the upper mold base. The pressure-stopping component can abut against the upper mold base to restrict the movement of the upper mold base toward the lower mold base.

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