Punching die
By designing a dual -knife -mouth punch mold, two types of blades set by the ladder are used to combine rough -sized punching, which solves the problem of difficulty removing the injection molding embryo. life.
Patent Information
- Application Number
- CN202421188119.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-05-29
AI Technical Summary
In the prior art, the injection molding embryo obtained after injection molding has large residues at the gate position, resulting in low manual trimming efficiency and difficult to guarantee product quality. Especially for products with high requirements for residue residues in the pouring mouth, manual trimming is not only Inefficient efficiency and are prone to problems such as overcutting and deformation, which increases the defect rate and production costs.
Designed a dual -knife -mouth punch mold, including upper molding, lower molds, and knife blocks. The knife block has the first and second punch cutting blades. First use the first blade for rough processing, retain a small amount of pouring residue, and then use the second blade for precision cutting to avoid the rush and deformation caused by the punch.
Through the punch mold, the residue of the product is accurately removed, which improves production efficiency, reduces the generation of burrs, ensures the quality of the punch and the product yield, and extend the service life of the mold.
Smart Images
Figure CN222406929U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to a punching die, in particular to a punching die with double cutting edges. Background Art
[0002] In the existing production technology, the injection molded embryo obtained after injection molding has a large residue at the gate position. If the traditional manual trimming method is used, it will waste manpower, low production efficiency, and product quality cannot be guaranteed. Especially for products with high requirements for gate residue, manual trimming is not only inefficient, but also prone to overcutting, resulting in a high product defect rate, which seriously affects production efficiency and increases production costs.
[0003] Therefore, the above situation needs to be resolved urgently. Utility Model Content
[0004] Purpose of the utility model: In order to overcome the above shortcomings, the utility model provides a punching die, specifically a punching die with double cutting edges.
[0005] Technical solution: In order to achieve the above-mentioned purpose, a punching die includes an upper die, a lower die, and a knife block. The upper die and the lower die are opposite to each other. A groove is provided in the middle part of the top surface of the lower die close to the upper die, and a first punching blade for the knife block to pass through is provided at one end of the groove, and a feed hole passes through the lower die. The knife block is fixedly connected to the upper die, and the knife block extends into the feed hole. The knife block is provided with a first punching blade and a second punching blade, and the first punching blade is lower than the second punching blade in a stepped arrangement. During punching, the product is placed in a groove consistent with the product shape, and the groove consistent with the product shape limits the product, and the part to be punched is placed above the feed hole. By limiting the product by the groove consistent with the product shape, the stability of the limit is improved and the product defective rate is reduced. The feed hole passes through the lower die. The knife block is provided with a first punching blade and a second punching blade, and the first punching blade is lower than the second punching blade in a stepped arrangement. During the punching process, the upper die moves toward the lower die, and then the knife block enters the feed hole to punch the product. The first punching blade punches the gate residue first, leaving a small amount of gate residue, and then the second punching blade performs precision punching on the product. Avoid punching once, because the gate residue is large, the product will have problems such as punching and deformation. Punching and removing the gate residue of the product through the punching die improves production efficiency. The single-edged blade of the traditional blade is changed to a double-edged blade, and one rough processing and one fine processing are achieved in one punching, thereby reducing the generation of burrs, ensuring punching efficiency, improving punching quality, and improving the yield rate of the product. In addition, the double-edged blade block can disperse the stress during punching, reduce the wear of the blade edge, and thus extend the service life of the mold.
[0006] Furthermore, in the above-mentioned punching die, the first punching blade and the second punching blade are in an arc shape. The traditional punching blade is a straight line. When the punching blade contacts the product, the punching surface is large, the product is subjected to a large instantaneous force, and it is easy to produce impact and vibration. The product is prone to chipping and deformation, and burrs and deformation are increased, resulting in reduced product quality. The punching blade is changed to an arc shape. When the punching blade contacts the product, the punching surface is smaller, the product is subjected to less force, the punching process is smoother, and the impact and vibration during punching are reduced. The product is not prone to chipping and deformation, and burrs are reduced. The punching quality is improved, and the subsequent processing steps are reduced. In addition, the arc-shaped blade can disperse the stress during punching, reduce blade wear, and increase the service life of the mold.
[0007] Furthermore, in the above punching die, the first punching blade and the second punching blade are arranged on the same side of the blade block, the first punching blade is lower than the second punching blade in the vertical direction, the distance between the second punching blade and the blade block in the horizontal direction is greater than the distance between the first punching blade and the blade block in the horizontal direction, and the first punching blade and the second punching blade are stepped. The horizontal and vertical distances between the first punching blade and the second punching blade can also be determined according to different usage requirements and design requirements to meet the punching efficiency and punching quality.
[0008] Furthermore, in the above punching die, the upper die includes an upper die seat and a knife plate. The lower die includes a lower die seat and a concave die. The upper die seat, the knife plate, the concave die, and the lower die seat are arranged in sequence. The knife block is fixedly connected to the upper die seat, and the knife plate is provided with a knife hole for the knife block to pass through. During punching, the knife block slides in the knife hole.
[0009] Furthermore, in the above-mentioned punching die, a guide column is fixed to the upper die seat, and the knife plate is provided with a through hole corresponding to the guide column. The die is provided with a first positioning hole corresponding to the guide column, and the guide column extends through the through hole into the first positioning hole, and the lower end of the guide column maintains a distance from the upper surface of the lower die seat. During the punching process, the guide column always slides in the first positioning hole, and the guide column limits the relative position of the upper die seat, the knife plate, and the die from shifting, thereby preventing the knife block from shifting during the punching process and causing overcutting.
[0010] Furthermore, in the above-mentioned punching die, the knife plate is provided with a knife hole for the knife block to pass through, and the knife plate is provided with a countersunk hole on the side close to the upper die seat, and a spring is provided in the countersunk hole, the lower end of the spring is connected to the bottom surface of the countersunk hole, and the upper end of the spring forms an extrusion on the bottom surface of the upper die seat. A countersunk through hole is provided on the side of the knife plate away from the upper die seat, and the knife plate is connected to the upper die seat through the countersunk through hole by a screw. Before punching, the spring applies a thrust to the upper die seat, pushing the upper die seat away from the knife plate and maintaining the punching distance, at which time the distance between the screw head of the above-mentioned screw and the bottom surface of the knife plate is greater than the above-mentioned punching distance. During punching, the knife plate first moves downward and contacts the die to press the product placed in the groove, and then the upper die seat moves toward the knife plate, and then the upper die seat drives the knife block to move toward the die, and the knife block enters the blanking hole to punch the product.
[0011] Furthermore, in the above punching die, a side of the blade plate adjacent to the die is provided with an avoidance groove, and the avoidance groove is provided on the upper side of the groove. The avoidance groove avoids the raised part of the product, and during the punching process, the blade plate moves downward and contacts the die, and the avoidance groove and the groove jointly squeeze and fix the product. There is an avoidance hole in the avoidance groove.
[0012] Furthermore, in the above-mentioned punching die, the lower die seat is provided with a discharge trough, and waste materials in the punching process are discharged from the discharge trough.
[0013] Furthermore, in the above-mentioned punching die, the groove is provided with a second positioning hole and a positioning surface, and the second positioning hole and the positioning surface cooperate to position the product. The second positioning hole and the positioning surface can position the product to reduce the processing difficulty and improve the positioning accuracy.
[0014] Furthermore, in the punching die mentioned above, the second positioning hole is elliptical, and only the second positioning hole is needed to position the product, thereby reducing the difficulty of processing.
[0015] It can be seen from the above technical scheme that the utility model has the following beneficial effects: the punching die of the utility model can punch and remove the product gate residue through the punching die, thereby improving production efficiency, changing the single-edged blade of the traditional blade block to a double-edged blade, achieving one rough processing and one fine processing in one punching, thereby reducing the generation of burrs, ensuring the punching efficiency, improving the punching quality, and improving the product yield. In addition, the double-edged blade block can disperse the stress during punching, reduce the wear of the blade edge, and thus extend the service life of the mold. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of the punching die of the utility model;
[0017] Figure 2 It is a left side view of the punching die of the utility model;
[0018] Figure 3 For this utility model Figure 2 A-axis sectional view;
[0019] Figure 4 It is a right side view of the knife block described in the utility model;
[0020] Figure 5 It is a structural schematic diagram of the knife block described in the utility model;
[0021] Figure 6 It is a top view of the punching die of the utility model;
[0022] Figure 7 For the utility model Figure 6 Middle B-direction sectional view;
[0023] Figure 8 For the utility model Figure 6 Middle C-axis sectional view;
[0024] Fig. 9 This is a bottom view of the knife plate of the utility model;
[0025] Fig.10 It is a top view of the concave mold described in the utility model.
[0026] In the figure: 1 upper die, 11 upper die seat, 111 guide column, 12 knife plate, 120 groove, 121 through hole, 122 knife hole, 123 countersunk hole, 124 spring, 125 countersunk through hole, 126 avoidance groove, 13 blanking groove, 2 lower die, 21 lower die seat, 211 second positioning hole, 212 positioning surface, 22 concave die, 221 first positioning hole, 23 blanking hole, 3 knife block, 31 first punching edge, 32 second punching edge. DETAILED DESCRIPTION
[0027] Example 1
[0028] like Figure 1-4 A punching die shown includes an upper die 1, a lower die 2, and a blade block 3. The upper die 1 and the lower die 2 are opposite to each other. A groove 120 is provided in the middle part of the top surface of the lower die 2 near the upper die 1, and a feed hole 23 for the blade block 3 to pass through is provided at one end of the groove 120, and the feed hole 23 passes through the lower die 2. The blade block 3 is fixedly connected to the upper die 1, and the blade block 3 extends into the feed hole 23. The blade block 3 is provided with a first punching blade 31 and a second punching blade 32, and the first punching blade 31 is lower than the second punching blade 32 and is arranged in a step. When punching, the product is placed in the groove 120 that is consistent with the shape of the product, and the groove 120 that is consistent with the shape of the product limits the product, and the part to be punched is placed above the feed hole 23. The blade block 3 is provided with a first punching blade 31 and a second punching blade 32, and the first punching blade 31 is lower than the second punching blade 32, and the first punching blade 31 and the second punching blade 32 keep a distance in the horizontal direction. The first punching blade 31 and the second punching blade 32 are arranged in a stepped manner. During the punching process, the upper die 1 moves toward the lower die 2, and the blade 3 enters the blanking hole 23 to punch the product. The first punching blade 31 first punches the gate residue, leaving a small amount of gate residue, and then the second punching blade 32 performs precision punching on the product.
[0029] like Figure 4-5 In the punching die shown, the first punching edge 31 and the second punching edge 32 are arranged on the same side of the blade block 3, and the first punching edge 31 and the second punching edge 32 are in an arc shape. The first punching edge 31 is lower than the second punching edge 32 in the vertical direction, and the distance between the second punching edge 32 and the blade block 3 in the horizontal direction is greater than the distance between the first punching edge 31 and the blade block 3 in the horizontal direction.
[0030] like Figure 6-7In the punching die shown, the upper die 1 includes an upper die base 11 and a knife plate 12. The upper die base 11 is fixed with a guide column 111, and the knife plate 12 is provided with a through hole 121 corresponding to the guide column 111. The lower die 2 includes a lower die base 21 and a die 22. The upper die base 11, the knife plate 12, the die 22, and the lower die base 21 are arranged in sequence. The die 22 is provided with a first positioning hole 221 corresponding to the guide column 111, and the guide column 111 extends into the first positioning hole 221 through the through hole 121, and the lower end of the guide column 111 maintains a distance from the upper surface of the lower die base 21. The lower die base 21 is provided with a material discharge trough 13, and the punching waste is discharged from the material discharge trough 13.
[0031] like Figure 8-9 In the punching die shown, the blade block 3 is fixedly connected to the upper die seat 11, the blade plate 12 is provided with a blade hole 122 for the blade block 3 to pass through, the blade plate 12 is provided with a countersunk hole 123 on the side close to the upper die seat 11, a spring 124 is provided in the countersunk hole 123, the lower end of the spring 124 is connected to the bottom surface of the countersunk hole 123, and the upper end of the spring 124 presses the bottom surface of the upper die seat 11. The blade plate 12 is provided with a countersunk through hole 125 on the side away from the upper die seat 11, and the blade plate 12 is connected to the upper die seat 11 through the countersunk through hole 125 by a screw. Before punching, the spring 124 applies a thrust to the upper die seat 11, pushing the upper die seat 11 away from the blade plate 12 and maintaining the punching distance. At this time, the distance between the screw head of the screw and the bottom surface of the blade plate 12 is greater than the above-mentioned punching distance.
[0032] like Fig. 9 In the punching die shown, a side of the blade 12 adjacent to the die 22 is provided with an avoidance groove 126, which is provided on the upper side of the groove 120. The avoidance groove 126 avoids the protruding part of the product. During the punching process, the blade 12 moves downward and contacts the die 22, and then the avoidance groove 126 and the groove 120 jointly press and fix the product. An avoidance hole is provided in the avoidance groove 126.
[0033] like Fig.10 In the punching die shown, the groove 120 is provided with a second positioning hole 211 and a positioning surface 212, and the second positioning hole 211 and the positioning surface 212 cooperate to position the product. The second positioning hole 211 is oval.
[0034] The above embodiments are exemplary, and their purpose is to illustrate the technical concept and features of the utility model so that people familiar with this field can understand the content of the utility model and implement it accordingly, and they cannot limit the protection scope of the utility model in turn. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.
Claims
1. A punching die, characterized in that: The invention comprises an upper die (1), a lower die (2) and a knife block (3); the upper die (1) and the lower die (2) are opposite to each other; a groove (120) is provided at the middle part of the top surface of the lower die (2) close to the upper die (1); a feed hole (23) for the knife block (3) to pass through is provided at one end of the groove (120); the knife block (3) and the upper die (1) are fixedly connected, and the knife block (3) extends into the feed hole (23); the knife block (3) is provided with a first punching edge (31) and a second punching edge (32); the first punching edge (31) is lower than the second punching edge (32) and is arranged in a stepped manner.
2. A punching die according to claim 1, characterized in that: The first punching edge (31) and the second punching edge (32) are in an arc shape.
3. A punching die according to claim 1, characterized in that: The first punching blade (31) and the second punching blade (32) are arranged on the same side of the knife block (3); the first punching blade (31) is lower than the second punching blade (32) in the vertical direction, and the distance from the second punching blade (32) to the knife block (3) in the horizontal direction is greater than the distance from the first punching blade (31) to the knife block (3).
4. A punching die according to claim 1, characterized in that: The upper die (1) comprises an upper die base (11) and a knife plate (12); the lower die (2) comprises a lower die base (21) and a concave die (22); the upper die base (11), the knife plate (12), the concave die (22) and the lower die base (21) are arranged in sequence; the knife block (3) is fixed to the upper die base (11), and the knife plate (12) is provided with a knife hole (122) for the knife block (3) to pass through.
5. A punching die according to claim 4, characterized in that: The upper die seat (11) is fixed with a guide column (111), the knife plate (12) is provided with a through hole (121) corresponding to the guide column (111), and the die (22) is provided with a first positioning hole (221) corresponding to the guide column (111); the guide column (111) passes through the through hole (121) and extends into the first positioning hole (221), and the lower end of the guide column (111) maintains a distance from the upper surface of the lower die seat (21).
6. A punching die according to claim 4, characterized in that: A countersunk hole (123) is provided on the side of the knife plate (12) close to the upper die seat (11), a spring (124) is provided in the countersunk hole (123), the lower end of the spring (124) is connected to the bottom surface of the countersunk hole (123), and the upper end of the spring (124) squeezes the bottom surface of the upper die seat (11); a countersunk through hole (125) is provided on the side of the knife plate (12) away from the upper die seat (11), and the knife plate (12) is connected to the upper die seat (11) by a screw passing through the countersunk through hole (125); the spring (124) applies a thrust to the upper die seat (11), pushes the upper die seat (11) away from the knife plate (12) and maintains the punching distance, at which time the distance between the screw head and the bottom surface of the knife plate (12) is greater than the above-mentioned punching distance.
7. A punching die according to claim 4, characterized in that: A side of the knife plate (12) adjacent to the die (22) is provided with an avoidance groove (126), and the avoidance groove (126) is provided on the upper side of the groove (120); the avoidance groove (126) and the groove (120) together squeeze and fix the product.
8. A punching die according to claim 1, characterized in that: The lower mold (2) is provided with a material discharge chute (13).
9. A punching die according to claim 1, characterized in that: The groove (120) is provided with a second positioning hole (211) and a positioning surface (212), and the second positioning hole (211) and the positioning surface (212) cooperate to position the product.
10. A punching die according to claim 9, characterized in that: The second positioning hole (211) is elliptical.