A production device for micro sealing rings

Abstract

The application provides a production device for micro sealing rings, which comprises a mold and a punching tool. The mold is used for forming a sheet-shaped semi-product with multiple micro sealing rings connected together with flash. The punching tool is used for automatically punching and removing the semi-product to obtain independent micro sealing rings. The mold comprises an upper mold plate and a lower mold plate. The mold core of the upper mold plate cooperates with the mold core of the lower mold plate to form multiple cavity modules. The cavity module comprises multiple mold cavities. An inner ring excess material groove is arranged at the inner ring of the mold cavity. An outer ring excess material groove is arranged at the outer ring of the mold cavity. A connecting inclined surface structure is arranged between the mold cavity and the inner ring excess material groove and the outer ring excess material groove. The production device has the following advantages: 1. automatic flash removal, high efficiency and low cost; 2. ensuring that the flash of the inner and outer rings is uniform and controllable, and improving the overall quality of the product; 3. accurately controlling the residual length of the flash to be less than 0.08 mm; and 4. the obtained product can adapt to dynamic sealing and has good sealing effect.

Description

Technical Field

[0001] This invention relates to the field of rubber seal manufacturing and processing technology, and more specifically, to a production apparatus for miniature sealing rings. Background Technology

[0002] Rubber O-rings are widely used in sealing systems across various industries. Depending on the application, the size of the O-rings varies. O-rings with an inner diameter less than 5mm and a cross-sectional diameter less than 1mm fall into the category of miniature O-rings. The production of miniature O-rings presents certain bottlenecks. Due to their small size, the cost of removing burrs from rubber O-rings is too high. Using liquid nitrogen freezing for burr removal results in the product's thin cross-section and small inner diameter, leading to freezing damage and requiring manual inspection to remove defective products, which is also costly. Manual trimming is inefficient due to the small size and difficulty in handling the product manually, resulting in high costs.

[0003] In summary, existing miniature sealing rings have the following disadvantages during production:

[0004] 1. Removing burrs is difficult, inefficient, and costly.

[0005] 2. The uneven removal of flash on the inner and outer rings of the product affects the overall quality.

[0006] 3. The length of residual flash cannot be effectively controlled, and the residual flash of the product often exceeds the quality requirement of 0.08mm.

[0007] 4. The miniature sealing rings produced cannot adapt to the harsh working conditions of dynamic sealing. The sealing rings are prone to generating debris during use, resulting in poor sealing performance.

[0008] 5. The outer edges of the sheet-like semi-finished products formed by existing technology are prone to curling, resulting in poor fit with the punching fixture. This leads to inaccurate clamping and positioning, which in turn results in low punching accuracy and low product qualification rate.

[0009] In view of this, the present invention is hereby proposed. Summary of the Invention

[0010] The purpose of this invention is to provide a production apparatus for miniature sealing rings, addressing the following shortcomings in the production of miniature sealing rings in the prior art: 1. Difficulty in removing flash, resulting in low efficiency and high cost; 2. Inconsistent flash removal effects between the inner and outer rings, affecting overall quality; 3. Inability to effectively control the residual flash length, often exceeding the quality requirement of 0.08mm; 4. The produced miniature sealing rings cannot adapt to the harsh conditions of dynamic sealing, and are prone to generating debris during use, resulting in poor sealing performance.

[0011] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0012] A production apparatus for miniature sealing rings includes a mold and a punching fixture. The mold is used to form a sheet-like semi-finished product with multiple miniature sealing rings connected together, and the punching fixture is used to automatically punch away the flash of the sheet-like semi-finished product to obtain individual miniature sealing rings. The mold includes an upper template and a lower template, and multiple mold cores are provided on both the upper and lower templates. The mold cores of the upper template and the mold cores of the lower template cooperate to form multiple cavity modules. Each cavity module includes multiple mold cavities. An inner ring material groove is provided on the inner ring of the mold cavity, and an outer ring material groove is provided on the outer ring of the mold cavity. A connecting inclined surface structure is provided between the mold cavity and the inner ring material groove and the outer ring material groove, and the tip of the connecting inclined surface structure is located on the side close to the mold cavity.

[0013] Furthermore, the angle of inclination of the connecting inclined surface structure is 25°~40°.

[0014] Furthermore, a tearing groove is provided around the periphery of the mold core, and an outer residual material groove is provided around the periphery of the tearing groove.

[0015] Furthermore, a positioning groove structure is provided on the mold core, which is used to form a positioning boss on the sheet-like semi-finished product after demolding.

[0016] Furthermore, the positioning groove structure includes a first positioning groove, which is located at the center of the mold core.

[0017] Furthermore, the positioning groove structure includes a second positioning groove, which is disposed at the edge of the mold core.

[0018] Furthermore, a positioning guide post is provided on one of the upper template and the lower template; a positioning guide sleeve is provided on the other of the upper template and the lower template, and the positioning guide sleeve cooperates with the positioning guide post for positioning.

[0019] Furthermore, the punching fixture includes, from top to bottom, an upper pad, a punch plate, a pre-pressing plate, a punch blade plate, and a lower pad; the punch plate is fixed to the upper pad, the pre-pressing plate is installed below the punch plate, and an elastic element is provided between the pre-pressing plate and the punch plate; the punch blade plate is fixed to the lower pad; a first punch for punching the inner circle flash of the product and a second punch for blanking the product are provided on the punch plate; a first through hole and a second through hole are provided on the pre-pressing plate, the first through hole cooperating with the first punch; the second through hole cooperating with the second punch; a punching station for punching the inner circle flash of the product and a punching station for blanking the product are correspondingly provided on the punching station, and multiple contour grooves are provided on both the punching station and the punching station, the contour grooves are used to position each product, and a punching structure is provided inside the contour grooves; a first drawer and a second drawer are installed on the lower pad, the first drawer is used to collect the flash residue of the punched inner hole; the second drawer is used to collect the independent micro sealing rings after punching.

[0020] Furthermore, the punching structure includes a first punch and a second punch, wherein the position of the first punch corresponds to the position of the first punch, and the position of the second punch corresponds to the position of the second punch.

[0021] Furthermore, at least one positioning hole structure is provided on both the inner hole punching station and the product punching station, and the positioning hole structure cooperates with the positioning boss on the sheet-like semi-finished product.

[0022] Compared with the prior art, the micro-sealing ring production device of the present invention has the following advantages:

[0023] 1) The micro sealing ring production device of the present invention has a punching tool that can automatically punch and remove the flash of the sheet-like semi-finished product to obtain an independent micro sealing ring. The automatic flash removal greatly improves efficiency and reduces cost.

[0024] 2) The micro sealing ring production device of the present invention provides an inner ring material groove in the inner ring of the mold cavity and an outer ring material groove in the outer ring of the mold cavity, so as to ensure that the flash of the inner and outer rings of the product is uniform and controllable, and improve the overall quality of the product.

[0025] 3) The production device for a miniature sealing ring of the present invention includes a connecting inclined surface structure between the mold cavity and the inner ring material groove and the outer ring material groove. The tip of the connecting inclined surface structure is located on the side close to the mold cavity, which can increase the strength of the mold cavity opening, prevent the tip from being crushed, and accurately control the residual length of the flash to <0.08mm.

[0026] 4) The micro sealing ring production device of the present invention produces micro sealing rings that can adapt to the harsh working conditions of dynamic sealing and have a good sealing effect. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of a micro sealing ring production device according to an embodiment of the present invention;

[0028] Figure 2 This is a top view of a micro-sealing ring production apparatus according to an embodiment of the present invention;

[0029] Figure 3 For along Figure 2 A sectional view of the center section line AA;

[0030] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0031] Figure 5 For along Figure 2 A sectional view of the mid-section line BB;

[0032] Figure 6 This is a three-dimensional structural diagram of the lower template of a micro sealing ring production device according to an embodiment of the present invention;

[0033] Figure 7 for Figure 6 Enlarged structural diagram at point A;

[0034] Figure 8 for Figure 7 Enlarged structural diagram at point A;

[0035] Figure 9 This is a three-dimensional structural diagram of the lower template of a micro sealing ring production device according to an embodiment of the present invention;

[0036] Figure 10 This is one of the three-dimensional structural schematic diagrams of a punching fixture for a miniature sealing ring according to an embodiment of the present invention;

[0037] Figure 11 This is a top view of a punching fixture for a miniature sealing ring according to an embodiment of the present invention;

[0038] Figure 12 For along Figure 11 A sectional view of the center section line AA;

[0039] Figure 13 This is a three-dimensional structural diagram of the punch plate of a punching fixture for a miniature sealing ring according to an embodiment of the present invention;

[0040] Figure 14This is a second three-dimensional structural schematic diagram of a punching fixture for a miniature sealing ring according to an embodiment of the present invention;

[0041] Figure 15 This is the third three-dimensional structural schematic diagram of a punching fixture for a miniature sealing ring according to an embodiment of the present invention;

[0042] Figure 16 for Figure 15 Enlarged structural diagram at point A;

[0043] Figure 17 This is a three-dimensional structural diagram of the lower pad of a punching fixture for a miniature sealing ring according to an embodiment of the present invention.

[0044] Explanation of reference numerals in the attached figures:

[0045] 1. Upper template; 11. Positioning guide post; 12. First mounting hole; 2. Lower template; 21. Positioning guide sleeve; 22. Second mounting hole; 3. Mold core; 31. Mold cavity; 32. Inner ring material groove; 33. Outer ring material groove; 34. Outer side material groove; 35. Tear edge groove; 36. Positioning groove structure; 361. First positioning groove; 362. Second positioning groove; 37. Connecting inclined surface structure; 371. First connecting inclined surface; 372. Second connecting inclined surface; 4. Punching fixture; 41. Upper pad; 42. Lower pad ; 421, First mounting slot; 422, Second mounting slot; 43, Punch plate; 431, First punch; 432, Second punch; 44, Pre-press plate; 441, First through hole; 442, Second through hole; 443, Connector; 45, Punch blade plate; 451, Punching inner hole station; 452, Punching product station; 453, Positioning hole structure; 454, Contouring groove; 455, Punching structure; 4551, First punch; 4552, Second punch; 46, First drawer; 47, Second drawer; 48, Elastic element. Detailed Implementation

[0046] To make the technical means and objectives and effects of the present invention easier to understand, the embodiments of the present invention will be described in detail below with reference to specific illustrations.

[0047] It should be noted that all directional and positional terms used in this invention, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "bottom," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connections between components in a specific state (as shown in the accompanying drawings). They are merely for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0048] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0051] Example 1

[0052] Existing miniature sealing rings have the following disadvantages during production:

[0053] 1. Removing burrs is difficult, inefficient, and costly.

[0054] 2. The uneven removal of flash on the inner and outer rings of the product affects the overall quality.

[0055] 3. The length of residual flash cannot be effectively controlled, and the residual flash of the product often exceeds the quality requirement of 0.08mm.

[0056] 4. The miniature sealing rings produced cannot adapt to the harsh working conditions of dynamic sealing. The sealing rings are prone to generating debris during use, resulting in poor sealing performance.

[0057] 5. The outer edges of the sheet-like semi-finished products formed by existing technology are prone to curling, resulting in low fit with the punching fixture 4. This leads to inaccurate clamping and positioning, and consequently, low punching accuracy and product qualification rate.

[0058] To address the aforementioned technical problems, this embodiment provides a micro-sealing ring production apparatus, such as... Figures 1-17 As shown, the production apparatus includes a mold and a punching fixture 4. The punching fixture 4 is interconnected with the mold. The mold is used to form a sheet-like semi-finished product with multiple micro-sealing rings connected together, and the punching fixture 4 is used to automatically punch away the flash of the sheet-like semi-finished product to obtain individual micro-sealing rings. In this application, the micro-sealing ring refers to a rubber sealing ring with an inner diameter of less than 5 mm and a cross-sectional diameter of less than 1 mm.

[0059] like Figures 1-9 As shown, the mold includes an upper template 1 and a lower template 2; multiple mold cores 3 are provided on both the upper template 1 and the lower template 2. The mold cores 3 of the upper template 1 and the mold cores 3 of the lower template 2 cooperate to form multiple cavity modules. Each cavity module includes multiple mold cavities 31, such as... Figure 4 As shown, an inner ring material groove 32 is provided in the inner ring of the mold cavity 31, and an outer ring material groove 33 is provided in the outer ring of the mold cavity 31. A connecting inclined surface structure 37 is provided between the mold cavity 31, the inner ring material groove 32, and the outer ring material groove 33. The tip of the connecting inclined surface structure 37 is located on the side close to the mold cavity 31.

[0060] The miniature sealing ring production apparatus described in this embodiment has the following advantages:

[0061] 1. The punching fixture 4 can automatically punch and remove the flash of sheet-like semi-finished products to obtain independent micro-sealing rings. The automatic flash removal greatly improves efficiency and reduces costs.

[0062] 2. An inner ring excess material groove 32 is provided on the inner ring of the mold cavity 31, and an outer ring excess material groove 33 is provided on the outer ring of the mold cavity 31 to ensure that the flash of the inner and outer rings of the product is uniform and controllable, thereby improving the overall quality of the product.

[0063] 3. A connecting inclined surface structure 37 is provided between the mold cavity 31 and the inner ring material groove 32 and the outer ring material groove 33. The tip of the connecting inclined surface structure 37 is located on the side close to the mold cavity 31, which can increase the strength of the mold cavity 31 opening, prevent the tip from being crushed, and make the residual length of the flash accurately controlled to <0.08mm.

[0064] 4. The miniature sealing rings produced can adapt to the harsh working conditions of dynamic sealing and have a good sealing effect.

[0065] The mold core 3 of the upper template 1 is matched with the mold core 3 of the lower template 2, that is, the number of mold core 3 of the upper template 1 and the mold core 3 of the lower template 2 are the same and their positions correspond.

[0066] Each cavity module is formed into a sheet-like semi-finished product with multiple micro-sealing rings connected together, featuring burrs.

[0067] Specifically, such as Figure 6 and Figure 9 As shown, annular bearing surfaces are provided on both the upper template 1 and the lower template 2. The mold core 3 of the upper template 1 is evenly distributed in a 360° annular shape on the annular bearing surface of the upper template 1; the mold core 3 of the upper template 1 is evenly distributed in a 360° annular shape on the annular bearing surface of the lower template 2.

[0068] This arrangement ensures that the multiple cavity modules are evenly distributed in a 360° ring around the center of the mold, so that the distribution range of the cavity modules is exactly within the working range of the hydraulic cylinder of the vulcanizing press, thus guaranteeing that each cavity module is subjected to uniform force during production.

[0069] Furthermore, the number of cavity modules is not specifically limited.

[0070] The number of cavity modules can be set to eight, nine, or ten, and is not limited to these.

[0071] In this embodiment, as Figure 6 As shown, the cavity module is configured as eight.

[0072] Furthermore, the number of cavities 31 included in each cavity module is not specifically limited.

[0073] Each cavity module can include 96 cavities 31, or 98 or 100 cavities, and is not limited thereto.

[0074] In this embodiment, as Figure 7 As shown, each cavity module includes ninety-six cavities 31.

[0075] More specifically, such as Figure 4 As shown, a first connecting slope 371 is provided between the mold cavity 31 and the inner ring material groove 32, and a second connecting slope 372 is provided between the mold cavity 31 and the outer ring material groove 33. The tips formed by the first connecting slope 371 and the second connecting slope 372 are located on the side close to the mold cavity 31.

[0076] Specifically, the inclined angle of the connecting inclined structure 37 is 25°~40°.

[0077] This setting can both increase the strength of the mold cavity 31 opening to prevent the mold edge from being crushed during production, and can precisely control the residual length of the flash to <0.08mm.

[0078] Preferably, in this embodiment, the inclined angle of the connecting inclined surface structure 37 is 30°.

[0079] This setting can both increase the strength of the mold cavity 31 opening to prevent the mold edge from being crushed during production, and can precisely control the residual length of the flash to <0.08mm.

[0080] Specifically, such as Figure 8 As shown, a tearing groove 35 is provided around the mold core 3, and an outer residual material groove 34 is provided around the tearing groove 35.

[0081] This design prevents the outer edges of the sheet-like semi-finished product from curling, ensuring a high degree of fit with the punching fixture 4, thereby achieving high clamping and positioning accuracy, and consequently, high punching precision and yield.

[0082] The cross-section of the inner ring material groove 32 is elliptical, and the outer circle dimension of the inner ring material groove 32, i.e., the major axis of the ellipse, is the inner diameter dimension D of the mold cavity 31. 内 / 1.02, the depth of the inner ring material groove 32, i.e. the minor axis of the ellipse, is 0.1~0.2mm smaller than the cross-sectional diameter d of the mold cavity 31.

[0083] This setup ensures that during subsequent stamping, the sheet-like semi-finished product is first fixed in place, while the excess material in the inner ring is freely punched away.

[0084] The cross-section of the outer ring material groove 33 is elliptical, and the inner circle dimension of the outer ring material groove 33 is equal to the outer diameter D of the mold cavity 31. 外 The minor axis (depth) of the ellipse of the outer ring material groove 33 is 1.10 times the cross-sectional diameter d of the mold cavity 31; the major axis (width) of the ellipse of the outer ring material groove 33 is 1.25 times the cross-sectional diameter d of the mold cavity 31.

[0085] This setup ensures that during subsequent punching, the sheet-like semi-finished product is fixed on the punching fixture 4, and the outer ring of the excess material groove 33 is fully locked and fixed, allowing the product to be punched and dropped freely.

[0086] Specifically, such as Figure 7 As shown, a positioning groove structure 36 is provided on the mold core 3. The positioning groove structure 36 is used to form a positioning boss on the sheet-like semi-finished product after demolding, so that the sheet-like semi-finished product can be quickly and accurately positioned during punching, and the positioning accuracy is higher.

[0087] Specifically, such as Figure 7As shown, the positioning groove structure 36 includes a first positioning groove 361, which is located at the center of the mold core 3.

[0088] This setting ensures accurate positioning during the punching of sheet-like semi-finished products.

[0089] Specifically, such as Figure 7 and Figure 8 As shown, the positioning groove structure 36 includes a second positioning groove 362, which is disposed at the edge of the mold core 3.

[0090] This setting further improves the accuracy of positioning during the punching of sheet-like semi-finished products.

[0091] Furthermore, the number of the second positioning grooves 362 is not specifically limited.

[0092] More specifically, in this embodiment, such as Figure 7 As shown, there are four second positioning grooves 362, which are evenly distributed on the edge of the mold core 3.

[0093] This setting further improves the accuracy of positioning during the punching of sheet-like semi-finished products.

[0094] Specifically, a positioning guide post 11 is provided on one of the upper template 1 and the lower template 2; a positioning guide sleeve 21 is provided on the other of the upper template 1 and the lower template 2, and the positioning guide sleeve 21 cooperates with the positioning guide post 11 for positioning.

[0095] This setting facilitates quick mold closing between the upper template 1 and the lower template 2.

[0096] Specifically, in this embodiment, such as Figure 5 and Figure 9 As shown, positioning guide posts 11 are provided on the upper template 1; as Figure 5 and Figure 6 As shown, a positioning guide sleeve 21 is provided on the lower template 2.

[0097] Specifically, in this embodiment, such as Figure 5 As shown, a first mounting hole 12 is provided on the upper template 1, and the positioning guide post 11 is installed in the first mounting hole 12; a second mounting hole 22 is provided on the lower template 2, the second mounting hole 22 cooperates with the first mounting hole 12, and the positioning guide sleeve 21 is installed in the second mounting hole 22.

[0098] During actual production, the mold is fixed on a 250T vulcanizing press manufactured by Pan Petrochemical. The vulcanizing press heats the upper mold platen 1 and lower mold platen 2 to 180-200℃ using resistance wire heating. Granular nitrile rubber raw material is added to the mold cavity 31 via a feeder. Then, the upper mold platen 1 and lower mold platen 2 close, and the vulcanizing press provides a 250T clamping force to the mold. The raw material is vulcanized for 240 seconds under the pressure and temperature of the mold cavity 31, and the molding process is complete after the product is fully vulcanized. The raw material for the micro-sealing ring is nitrile rubber, with a single-product consumption of 0.52-0.6g.

[0099] In this embodiment, after demolding, eight sheet-like semi-finished products with multiple micro-sealing rings connected together are obtained, and each sheet-like semi-finished product has ninety-six micro-sealing rings and five positioning bosses.

[0100] In addition to the structure described above, the mold also includes other related components. Since the specific structure and assembly relationship of these components are existing technologies, they will not be described in detail here.

[0101] like Figures 10-16 As shown, the punching fixture 4 includes, from top to bottom, an upper pad 41, a punch plate 43, a pre-pressing plate 44, a punch blade plate 45, and a lower pad 42. The punch plate 43 is fixed to the upper pad 41, and the pre-pressing plate 44 is installed below the punch plate 43, with an elastic element 48 provided between the pre-pressing plate 44 and the punch plate 43. The punch blade plate 45 is fixed to the lower pad 42. A first punch 431 for punching the inner circumference of the product and a second punch 432 for blanking the product are provided on the punch plate 43. A first through hole 441 and a second through hole 442 are provided on the pre-pressing plate 44, with the first through hole 441 connecting to the first punch. The second through hole 442 is engaged with the second punch 432; the punching station 451 for punching the inner circle flash of the product and the punching station 452 for blanking the product are correspondingly provided on the punching plate 45. Multiple contouring grooves 454 are provided on both the punching station 451 and the punching station 452. The contouring grooves 454 are used to position each product. A punching structure 455 is provided inside the contouring grooves 454; a first drawer 46 and a second drawer 47 are installed on the lower pad plate 42. The first drawer 46 is used to collect the flash residue after punching the inner hole; the second drawer 47 is used to collect the punched product.

[0102] Furthermore, the elastic element 48 is not specifically limited.

[0103] In this embodiment, the elastic element 48 is a spring.

[0104] Furthermore, the number of elastic elements 48 is not specifically limited.

[0105] In this embodiment, the number of elastic elements 48 is set to six.

[0106] More specifically, such as Figure 14 As shown, the preload plate 44 is suspended on the punch plate 43 by the connector 443.

[0107] Furthermore, the connector 443 is not specifically limited.

[0108] In this embodiment, the connector 443 is a shoulder bolt.

[0109] Furthermore, the number of the connectors 443 is not specifically limited.

[0110] In this embodiment, the number of connectors 443 is set to four.

[0111] This configuration improves the connection stability between the preload plate 44 and the punch plate 43.

[0112] The four connectors 443 are symmetrically arranged on the front and rear sides of the preload plate 44.

[0113] This configuration improves the connection balance between the preload plate 44 and the punch plate 43.

[0114] The punch plate 43 and the punch blade plate 45 are precisely positioned by guide posts and guide sleeves.

[0115] like Figure 16 As shown, the punching structure 455 includes a first punch 4551 and a second punch 4552. The position of the first punch 4551 corresponds to the position of the first punch 431, and the position of the second punch 4552 corresponds to the position of the second punch 432.

[0116] More specifically, the center distance between two adjacent first punches 4551 is 0.05~0.08mm larger than the center distance between two actual adjacent products; the center distance between two adjacent second punches 4552 is 0.05~0.08mm larger than the center distance between two actual adjacent products.

[0117] This feature effectively prevents the product from being damaged by impact.

[0118] More specifically, the gap between the first punch 431 and the first punch hole 4551 is 0.03~0.06mm, and the gap between the position of the second punch hole 4552 and the second punch 432 is 0.03~0.06mm.

[0119] This gap is used to control the residual length of the flash, so that the residual length of the flash is precisely controlled to <0.08mm.

[0120] like Figure 16 As shown, at least one positioning hole structure 453 is provided on both the inner hole punching station 451 and the product punching station 452. The positioning hole structure 453 cooperates with the positioning boss on the sheet-like semi-finished product.

[0121] Specifically, such as Figure 17 As shown, a first mounting groove 421 and a second mounting groove 422 are provided on the lower pad 42. The first drawer 46 is installed in the first mounting groove 421, and the second drawer 47 is installed in the second mounting groove 422.

[0122] The hardness of the punch plate 43 and the punch blade 45 shall reach HRC58-65.

[0123] This setting ensures punching accuracy and die life.

[0124] The punching fixture 4 operates in two steps:

[0125] Step 1: Punching the inner circumference flash: First, the sheet-like semi-finished product is installed on the punching station 451 of the punch plate 45. The punch plate 43, carrying the pre-pressure plate 44, descends. The pre-pressure plate 44 first contacts the punch plate 45, pressing the sheet-like semi-finished product tightly onto the punch plate 45. As the punch plate 43 continues to descend, the elastic element 48 is compressed. The first punch 431 of the punch plate 43 passes through the first through hole 441 on the pre-pressure plate 44 and accurately enters the first punch hole 4551 of the punch plate 45, punching away the inner circumference flash of the product located at the inner hole position. At this time, the inner circumference flash of the sheet-like semi-finished product is completely removed. After punching is completed, the external pressure is released, the elastic element 48 springs back, and the punch plate 43 retracts to its original position.

[0126] Step 2, Blanking: Remove the sheet-like semi-finished product with the inner circumference burrs removed and install it at the punching station 452. The punch plate 43 moves downward with the pre-pressing plate 44. The pre-pressing plate 44 first contacts the punching plate 45. At this time, the pre-pressing plate 44 presses the sheet-like semi-finished product tightly onto the punching plate 45. As the punch plate 43 continues to move downward, the elastic element 48 is compressed. The second punch 432 of the punch plate 43 passes through the second through hole 442 on the pre-pressing plate 44 and accurately enters the second punch hole 4552 of the punching plate 45, successfully blanking each micro-sealing ring on the sheet-like semi-finished product into the second drawer 47 at the bottom. At this time, an individual micro-sealing ring is obtained.

[0127] The punching fixture 4 described in this embodiment has the following advantages:

[0128] 1. Integrated two-step punching design, streamlined process, and high efficiency: The punching fixture 4 of this application integrates internal burr punching and product blanking into different stations of the same fixture (internal hole punching station 451 and product punching station 452). During operation, the sheet-like semi-finished product only needs to be transferred between the two stations once to complete all burr removal and blanking operations. The fixture structure of this application is more compact and easier to operate, reducing positioning errors and time losses caused by multiple product transfers. Trimming one sheet-like semi-finished product (96 products) takes only 60 seconds, improving efficiency by approximately 900%.

[0129] 2. Pre-pressure plate 44 ensures punching accuracy and high product qualification rate: The setting of pre-pressure plate 44 ensures that the sheet-like semi-finished product is firmly fixed and does not move during punching, thereby ensuring punching accuracy and avoiding the problems of punching deviation and uneven flash residue caused by poor product positioning in the existing technology. The product punching qualification rate is as high as 99.4%.

[0130] 3. The contour groove 454 and the positioning boss form a dual positioning, which is accurate and reliable: The contour groove 454 is used in conjunction with the positioning boss (formed by the positioning groove structure 36 of the mold) on the sheet-like semi-finished product to form a dual positioning mechanism, which ensures that each micro sealing ring is in a precise position before punching. The positioning accuracy is much higher than the positioning method of the existing technology that relies solely on the shape of the limiting groove.

[0131] 4. Dual-drawer sorting and collection, eliminating the need for additional air blowing for chip removal: A first drawer 46 and a second drawer 47 are installed on the lower pad 42. The first drawer 46 is used to collect the inner hole flash scrap after punching, and the second drawer 47 is used to collect the individual punched products. During the punching process, the inner hole flash scrap and the finished product fall into their respective drawers, achieving automatic sorting and collection of waste and products.

[0132] The drawer collection method of this application is simpler, eliminating the need for a blower and a corresponding blower station, further simplifying the equipment structure and reducing manufacturing costs.

[0133] 5. Precise fit between the punch and the through hole ensures punching quality: The pre-pressing plate 44 is provided with a first through hole 441 and a second through hole 442, which respectively mate with the first punch 431 and the second punch 432. When the punch passes through the through hole, the through hole guides and limits the punch, ensuring that the punch accurately enters the punching structure 455 of the punching plate 45, and the punching position is precise. Combined with the design that the gap between the first punch 431 and the first punch 4551 is 0.03~0.06mm, and the gap between the second punch 4552 and the second punch 432 is 0.03~0.06mm, the residual length of the flash can be precisely controlled to less than 0.08mm, meeting the strict quality requirements of the miniature sealing ring.

[0134] 6. Modular structure for easy maintenance and replacement: The punching fixture 4 adopts a layered modular structure consisting of an upper backing plate 41, a punch plate 43, a pre-pressing plate 44, a punch blade plate 45, and a lower backing plate 42. Each layer is precisely positioned by guide posts and guide sleeves. When the punch wears out or needs to be replaced with a different specification, only the corresponding layer plate needs to be removed, making maintenance convenient and replacement costs low.

[0135] 7. Co-design with the mold to form a complete production chain: The structural parameters of the punching fixture 4 (the gap between the first punch 431 and the first punch 4551 is 0.03~0.06mm, the position of the second punch 4552 and the gap between the second punch 432 are designed to be 0.03~0.06mm, the center distance between two adjacent first punches 4551 is 0.05~0.08mm larger than the center distance between two actual adjacent products; the center distance between two adjacent second punches 4552 is 0.05~0.08mm larger than the center distance between two actual adjacent products) are precisely matched with the dimensions of the mold cavity 31 and the dimensions of the material groove, forming a complete automated production chain from mold forming → positioning boss → contour groove 454 positioning → precision punching → drawer collection, realizing the technological leap from "manual inefficient trimming" to "automated and efficient punching" of micro sealing rings.

[0136] The punching fixture 4 includes other related components in addition to the structure described above. Since the specific structure and assembly relationship of these related components are existing technologies, they will not be described in detail here.

[0137] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A production apparatus for miniature sealing rings, characterized in that, The production device includes a mold and a punching fixture (4). The mold is used to form a sheet-like semi-finished product with multiple micro-sealing rings connected together with flash. The punching fixture (4) is used to automatically punch and remove the flash of the sheet-like semi-finished product to obtain independent micro-sealing rings. The mold includes an upper template (1) and a lower template (2). Multiple mold cores (3) are provided on both the upper template (1) and the lower template (2). The mold cores (3) of the upper template (1) and the mold cores (3) of the lower template (2) cooperate to form multiple cavity modules. The cavity modules include multiple mold cavities (31). An inner ring material groove (32) is provided in the inner ring of the mold cavity (31). An outer ring material groove (33) is provided in the outer ring of the mold cavity (31). A connecting inclined surface structure (37) is provided between the mold cavity (31) and the inner ring material groove (32) and the outer ring material groove (33). The tip of the connecting inclined surface structure (37) is located on the side close to the mold cavity (31).

2. The micro-sealing ring production apparatus according to claim 1, characterized in that, The inclined angle of the connecting inclined structure (37) is 25°~40°.

3. The micro-sealing ring production apparatus according to claim 1, characterized in that, A tearing groove (35) is provided on the periphery of the mold core (3), and an outer residual material groove (34) is provided on the periphery of the tearing groove (35).

4. The micro-sealing ring production apparatus according to claim 1, characterized in that, A positioning groove structure (36) is provided on the mold core (3), and the positioning groove structure (36) is used to form a positioning boss on the sheet-like semi-finished product after demolding.

5. The apparatus for producing a miniature sealing ring according to claim 4, characterized in that, The positioning groove structure (36) includes a first positioning groove (361), which is located at the center of the mold core (3).

6. A production apparatus for a miniature sealing ring according to claim 4 or 5, characterized in that, The positioning groove structure (36) includes a second positioning groove (362), which is located at the edge of the mold core (3).

7. The apparatus for producing miniature sealing rings according to claim 1, characterized in that, A positioning guide post (11) is provided on one of the upper template (1) and the lower template (2); a positioning guide sleeve (21) is provided on the other of the upper template (1) and the lower template (2), and the positioning guide sleeve (21) cooperates with the positioning guide post (11) for positioning.

8. The apparatus for producing a miniature sealing ring according to claim 1, characterized in that, The punching fixture (4) includes, from top to bottom, an upper pad (41), a punch plate (43), a pre-pressing plate (44), a punch blade plate (45), and a lower pad (42); the punch plate (43) is fixed to the upper pad (41), the pre-pressing plate (44) is installed below the punch plate (43), and an elastic element (48) is provided between the pre-pressing plate (44) and the punch plate (43); the punch blade plate (45) is fixed to the lower pad (42); a first punch (431) for punching the inner circle flash of the product and a second punch (432) for blanking the product are provided on the punch plate (43); a first through hole (441) and a second through hole (442) are provided on the pre-pressing plate (44), and the first through hole (441) and the first punch are connected. (431) are matched; the second through hole (442) is matched with the second punch (432); the punching station (451) for punching the inner circle flash of the product and the punching station (452) for blanking the product are respectively set on the punching plate (45). Multiple contouring grooves (454) are set on the punching station (451) and the punching station (452). The contouring grooves (454) are used to position each product. The punching structure (455) is set inside the contouring grooves (454); the first drawer (46) and the second drawer (47) are installed on the lower pad plate (42). The first drawer (46) is used to collect the flash residue of the inner hole after punching; the second drawer (47) is used to collect the independent micro sealing rings after punching.

9. The apparatus for producing a miniature sealing ring according to claim 8, characterized in that, The punching structure (455) includes a first punch (4551) and a second punch (4552). The position of the first punch (4551) corresponds to the position of the first punch (431), and the position of the second punch (4552) corresponds to the position of the second punch (432).

10. The apparatus for producing a miniature sealing ring according to claim 8, characterized in that, At least one positioning hole structure (453) is provided on both the inner hole punching station (451) and the product punching station (452), and the positioning hole structure (453) cooperates with the positioning boss on the sheet-like semi-finished product.

Images