CN112296615A - O-shaped sealing ring die and machining process thereof - Google Patents
O-shaped sealing ring die and machining process thereof Download PDFInfo
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- CN112296615A CN112296615A CN202011091578.4A CN202011091578A CN112296615A CN 112296615 A CN112296615 A CN 112296615A CN 202011091578 A CN202011091578 A CN 202011091578A CN 112296615 A CN112296615 A CN 112296615A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/24—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass dies
Abstract
The invention provides an O-shaped sealing ring mold which comprises a lower template and an upper template, wherein the lower template and the upper template are mutually matched to form at least one molding cavity for molding an O-shaped sealing ring, the molding cavity comprises an annular groove arranged on the upper end surface of the lower template and an annular bulge arranged on the lower end surface of the upper template and matched with the annular groove, and the annular bulge and the upper template are of an integrated structure; according to the O-shaped seal ring die, the integrated upper die plate and lower die plate are arranged, and the corresponding forming cutter and the forming process are matched, so that the processing period of the die can be shortened, and the production efficiency is improved.
Description
Technical Field
The invention relates to the technical field of design and manufacture of silicon rubber molds, in particular to an O-shaped sealing ring mold and a processing technology thereof.
Background
With the development of science and technology, the application of the O-shaped sealing ring is more and more extensive, and the O-shaped sealing ring is mainly used for static sealing and reciprocating motion sealing and is used for rotary motion sealing (only limited to a low-speed rotary sealing device). The types of the dies for the O-shaped sealing ring are various, but most dies are provided with an upper die plate mounting die core or a lower die plate mounting die core or both the upper die plate and the lower die plate mounting die core, and then the upper die plate and the lower die plate are matched to form a cavity for processing the O-shaped sealing ring.
The mold core adopting the disassembly and assembly type is arranged on the template, and has the following defects:
firstly, the assembly and disassembly type is adopted, so that the requirement on the installation precision is high, and the cost is increased;
secondly, the mold core needs to be arranged on the template, so that the production process of the O-shaped sealing ring mold is increased, and the efficiency is low;
thirdly, a gap may exist at the installation position of the mold core and the mold plate, and after long-time use, the gap is increased, so that burrs except the parting surface position exist in the O-shaped sealing ring.
In view of the above, the present invention provides an O-ring mold and a processing method thereof.
Disclosure of Invention
In order to solve the problems, the technical scheme of the invention is as follows:
in a first aspect, an object of the present invention is to provide an O-ring mold, which includes a lower template and an upper template, where the lower template and the upper template are matched with each other to form at least one molding cavity for molding an O-ring, the molding cavity includes an annular groove disposed on an upper end surface of the lower template and an annular protrusion disposed on a lower end surface of the upper template and matched with the annular groove, and the annular protrusion and the upper template are of an integrated structure.
Furthermore, a first overflow groove is formed in the lower template and located at the bottom of the annular groove.
Furthermore, a first chamfer is arranged at the opening of the first overflow groove, a second chamfer is arranged around the end face, close to the lower template, of the annular protrusion, and the first chamfer and the second chamfer form a first channel.
Further, first chamfer and second chamfer parallel arrangement, the distance between the two is 10-50 um.
Furthermore, a second overflow groove is formed in the end face, close to the lower template, of the upper template and located on the periphery of the annular protrusion.
Furthermore, a third chamfer is arranged at the opening of the annular groove, a fourth chamfer is arranged at the opening of the second overflow groove, and the third chamfer and the fourth chamfer form a second channel.
Further, the third chamfer and the fourth chamfer are arranged in parallel, and the distance between the third chamfer and the fourth chamfer is 10-50 um.
Further, the inner side wall of the annular groove is concave outwards, the bottom of the annular groove is concave downwards, the outer side wall of the annular protrusion is concave inwards, the joint of the outer side wall and the upper die plate is concave upwards, and the outer side wall and the upper die plate form a forming cavity of an O-shaped ring.
Furthermore, a plurality of molding cavities form a molding unit, guide grooves are formed in the periphery of the molding unit, and the guide grooves are formed in the upper end face of the lower template.
In a second aspect, a second object of the present invention is to provide a forming tool, configured to machine the annular groove and the annular protrusion in the first aspect, the forming tool includes a tool shank and a forming tool bit, the tool shank is connected to the forming tool bit through a transition portion, the forming tool bit is disposed at 135 degrees, a terminal of the forming tool bit is semicircular, and a specific center of the forming tool bit and a center of the tool shank are at 135 degrees.
In a third aspect, the invention provides a molding process of an O-ring mold, including molding an annular groove and molding an annular protrusion, where the annular groove is integrally formed on a lower mold plate and the annular protrusion is integrally formed on an upper mold plate, and where,
the annular groove forming comprises the following steps:
sa1, machining circular grooves: processing a circular groove by using a milling cutter;
sa2, bevel machining: boring the inner side wall of the circular groove by using a cutter with a 45-degree inclined surface, so that an opening of the inner side wall faces outwards to form an inclined surface, and a first overflow groove is formed at the bottom of the circular groove;
sa3, machining annular grooves: scraping the inclined surface by using a forming cutter of the second aspect, so that the upper part of the inclined surface is concave outwards and the lower part of the inclined surface is concave downwards to form an annular groove with a semicircular cross section;
the annular bulge forming comprises the following steps:
sb1, processing a circular boss, processing the circular boss by using a milling cutter, and forming a second overflow groove around the circular boss;
sb2, machining a conical table, boring the outer side wall of the circular boss by using a cutter with a 45-degree inclined plane, and forming the conical table on the outer side wall;
sb3, processing an annular bulge: and scraping the conical table by using the forming cutter of the second aspect, so that the upper part of the conical table is inwards concave and the lower part of the conical table is downwards concave to form an annular bulge with a semicircular cross section at two sides.
Further, when the annular groove is machined, the forming cutter scrapes clockwise; and when the annular boss is machined, the forming cutter scrapes anticlockwise.
According to the O-shaped seal ring die, the integrated upper die plate and lower die plate are arranged, and the corresponding forming cutter and the forming process are matched, so that the processing period of the die can be shortened, and the production efficiency is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Wherein:
FIG. 1 is a schematic structural view of a lower template of the present invention;
FIG. 2 is a schematic structural view of the upper die plate of the present invention;
FIG. 3 is a cross-sectional view of a single molding unit of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 of the present invention;
FIG. 5 is an exploded view of FIG. 3 of the present invention;
FIG. 6 is an enlarged view of a portion of FIG. 5 of the present invention;
FIG. 7 is a schematic structural view of a forming tool according to the present invention (schematic view of a machining annular protrusion);
FIG. 8 is a schematic view of the forming tool machining an annular groove of the present invention;
FIG. 9 is a front view of a forming blade head of the forming knife of the present invention;
FIG. 10 is a side view of a forming head of the forming knife of the present invention;
FIG. 11 is a flow chart of the annular groove process of the present invention;
FIG. 12 is a flow chart of the process of the annular projection of the present invention.
Description of reference numerals:
10. a lower template; 10a, a circular groove; 10b, a bevel; 11. an annular groove; 12. a first overflow tank; 13. a first chamfer; 14. a third chamfer; 15. a diversion trench; 20. mounting a template; 20a, a circular boss; 20b, a conical table; 21. an annular projection; 22. a second overflow tank; 23. a second chamfer; 24. a fourth chamfer; 30. forming a cavity; 40. a first channel; 50. a second channel; 60. forming a cutter; 61. a knife handle; 62. a transition section; 63. and (5) forming a cutter head.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In a first aspect, please refer to fig. 1 to 6, which are provided by the present invention, the O-ring mold includes a lower mold plate 10 and an upper mold plate 20, the lower mold plate 10 and the upper mold plate 20 are assembled to form at least one molding cavity 30 for molding an O-ring, the molding cavity 30 includes an annular groove disposed on an upper end surface of the lower mold plate 10 and an annular protrusion 21 disposed on a lower end surface of the upper mold plate 20 and engaged with the annular groove, the annular protrusion 21 and the upper mold plate are of an integrated structure, that is, the molding cavity 30 corresponding to the upper mold plate 20 and the lower mold plate 10 can be formed by integral molding, and a parting surface is disposed at a 45-degree position corresponding to the O-ring, so as to avoid a sealing working surface of the O-ring, and greatly improve a sealing effect of the O.
A first overflow groove 12 is formed in the lower die plate 10 and located at the bottom of the annular groove and used for storing redundant plastic, a first chamfer 13 is arranged at an opening of the first overflow groove 12, a second chamfer 23 is arranged on the periphery of the end face, close to the lower die plate 10, of the annular protrusion 21, the first chamfer 13 and the second chamfer 23 form a first channel 40, the first chamfer 13 and the second chamfer 23 are arranged in parallel, and the distance between the first chamfer 13 and the second chamfer 23 is 10-50 microns. A second overflow groove 22 is arranged on the end surface of the upper template close to the lower template 10 and around the annular bulge 21; a third chamfer 14 is arranged at the opening of the annular groove 11, a fourth chamfer 24 is arranged at the opening of the second overflow groove 22, a second channel 50 is formed by the third chamfer 14 and the fourth chamfer 24, the third chamfer 14 and the fourth chamfer 24 are arranged in parallel, and the distance between the third chamfer 14 and the fourth chamfer 24 is 10-50 mu m, so that a thin wall is formed between the formed sealing ring and the second overflow groove 22, and the sealing ring is convenient to take down; the first channel 40 and the second channel 50 are provided to facilitate the removal of the remnants (burrs left on the sealing rings after the sealing rings are formed) in the first overflow chute 12 and the second overflow chute 22 from the sealing rings.
The inner side wall of the annular groove 11 is concave outwards, the bottom of the annular groove is concave downwards, the outer side wall of the annular bulge 21 is concave inwards, the joint of the annular bulge and the upper template 20 is concave upwards, the annular bulge and the upper template form a forming cavity 30 of an O-shaped ring, and fluid plastic material enters the forming cavity 30 to form the O-shaped sealing ring; the mold of the invention further comprises positioning columns which are all conventional means and are not described in detail herein.
The forming units are composed of a plurality of forming cavities 30, the guide grooves 15 are arranged on the periphery of the forming units, the guide grooves 15 are arranged on the upper end surface of the lower template 10, the second overflow grooves 22 in the forming units are mutually communicated, after the upper and lower mold closing, the second overflow grooves 22 are communicated with the guide grooves 15, if a plurality of groups of forming units exist, the guide grooves 15 among the forming units are mutually communicated, namely, during production, plastic materials are placed on the upper end surface of the lower template 10 and cover the end surfaces of the forming cavities 30, the upper template 20 is close to the lower template 10 for hot pressing, the plastic materials are melted into fluid shapes, the fluid plastic materials enter the forming cavities 30, redundant plastic materials are retained in the second overflow grooves 22 and the guide grooves 15, the plastic materials retained in the second overflow grooves 22 connect the sealing rings (forming completion) in the forming cavities 30 in a single forming unit, and the plastic materials retained in the guide grooves 15 connect the sealing rings in the forming units, after hot press forming, one corner of the plastic material is pulled upwards, and then the formed sealing ring can be completely taken out, so that the time is saved, and the production efficiency is improved.
In a second aspect, please refer to fig. 7 to 10, which are provided by the present invention, a forming cutter 60 is used for processing the annular groove 11 and the annular protrusion 21 in the first aspect, the forming cutter 60 includes a cutter handle 61 and a forming cutter head 63 connected to a numerical control center, the cutter handle 61 and the forming cutter head 63 are connected through a transition portion 62, the forming cutter head 63 is disposed at 135 degrees, and the end is in a semi-circular shape, the center of the specific forming cutter head 63 and the center of the cutter handle 61 are 135 degrees, i.e., are fixedly connected to the transition portion 62 at 45 degrees downward, the same sides of the transition portion 62 and the forming cutter head 63 are both flush with one side of the cutter handle 61, two ends of the forming cutter head 63 are disposed as inclined surfaces 10b, the cross-sectional area of the forming cutter head 63 is gradually reduced from the side flush with the cutter handle 61 to the side away from the side flush with.
The specific use mode of the forming cutter 60 is as follows: in the manufacturing of the O-shaped sealing ring, the upper template 20 and the lower template 10 are required to be matched and then injected with glue. When the O-shaped sealing ring scraping machine is used, one side of the forming tool bit 63, which is flush with the tool shank 61, is driven by the machine to abut against the side wall of a template to be machined, tool setting is carried out, after the tool setting is finished, the tool shank 61 is taken as an origin of a coordinate axis, and one side of the forming tool bit 63, which is flush with one side of the tool shank 61, is flush with the other side of the tool shank 61, so that the position of the forming tool bit 63 can be easily positioned, the positioning precision is ensured, the forming tool bit 63 is inclined downwards by 45 degrees, and if the upper template 20 is scraped, the position of the forming tool bit 63, which faces the middle part; if the lower template 10 is scraped, the molding cutter head 63 is adjusted to face away from the lower template 10, so that the inner cavity of the lower template 10 of the 0-shaped sealing ring can be scraped clockwise; the upper and lower templates 10 of the O-shaped sealing ring can be processed by only one cutter, so that the effects of simple process and guaranteed processing precision are achieved.
In a third aspect, please refer to fig. 7 to 12, which are forming processes of an O-ring mold according to the present invention, including forming an annular groove 11 and forming an annular protrusion 21, where the annular groove 11 is integrally formed on the lower mold plate 10, and the annular protrusion 21 is integrally formed on the upper mold plate 20.
Wherein the forming of the annular groove 11 comprises the following steps:
sa1, circular groove 10 a: machining the circular groove 10a with a milling cutter;
sa2, bevel 10b machining: boring the inner side wall of the circular groove 10a by using a cutter with a 45-degree inclined surface 10b, so that the opening of the inner side wall is outward to form the inclined surface 10b, and the bottom of the circular groove 10a forms a first overflow groove 12;
sa3, machining annular groove 11: scraping the inclined surface 10b with a forming cutter 60 of the second aspect such that an upper portion of the inclined surface 10b is outwardly concave and a lower portion is downwardly concave and forms an annular groove 11 having a semicircular cross section;
sa4, the first chamfer 13 and the third chamfer 14 are machined, and the first chamfer 13 and the third chamfer 14 are respectively machined at corresponding positions by a chamfering tool.
The forming of the annular projection 21 comprises the following steps:
sb1, machining a circular boss 20a, machining the circular boss 20a by using a milling cutter, and forming a second overflow groove 22 around the circular boss 20 a;
sb2, machining a conical table 20b, boring the outer side wall of the circular boss 20a by using a cutter with a 45-degree inclined plane 10b, and forming the conical table 20b on the outer side wall;
sb3, machining annular projection 21: scraping the tapered table 20b with a forming cutter 60 of the second aspect such that the upper portion of the tapered table 20b is concave inward and the lower portion is concave downward and forms an annular projection 21 whose both sides in cross section are semicircular;
sb4, the second chamfer 23 and the fourth chamfer 24 are machined, and the second chamfer 23 and the fourth chamfer 24 are respectively machined at corresponding positions by a chamfering tool.
In the forming process, when the annular groove 11 is processed, the forming cutter 60 scrapes clockwise; when the annular boss is machined, the forming cutter 60 scrapes anticlockwise; the prior art is adopted when the circular groove 10a, the inclined surface 10b, the first chamfer 13, the third chamfer 14, the circular boss 20a, the tapered table 20b, the second chamfer 23 and the fourth chamfer 24 are processed, and therefore detailed description is omitted.
In conclusion, the O-shaped sealing ring die is provided with the integrated upper die plate and the integrated lower die plate, and is matched with the corresponding forming cutter and the forming process, so that the processing period of the die can be shortened, and the production efficiency is improved.
The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.
Claims (10)
1. The utility model provides a O type sealing washer mould, its characterized in that, includes lower bolster and cope match-plate pattern, the lower bolster forms at least one shaping cavity that is used for shaping O type sealing washer with the cope match-plate pattern of mutually closing, the shaping cavity is protruding including setting up in the annular groove of lower bolster up end and setting up terminal surface under the cope match-plate pattern and with annular groove complex annular, annular is protruding and last masterplate formula structure as an organic whole.
2. The O-ring die of claim 1, wherein a first overflow channel is formed in the lower die plate at the bottom of the annular groove.
3. The O-ring die of claim 2, wherein a first chamfer is provided at the first overflow groove opening, a second chamfer is provided around the end surface of the annular protrusion near the lower die plate, and the first chamfer and the second chamfer form a first channel.
4. An O-ring die according to claim 3, wherein said first chamfer and said second chamfer are disposed in parallel, and the distance between them is 10-50 um.
5. The O-shaped seal ring die as claimed in claim 1, wherein the second overflow chutes are arranged on the end face of the upper template close to the lower template and around the annular protrusion.
6. An O-ring die according to claim 5, wherein a third chamfer is provided at the opening of the annular groove, a fourth chamfer is provided at the opening of the second overflow channel, and the third chamfer and the fourth chamfer form a second channel.
7. The O-ring mold of claim 1, wherein the inner sidewall of the annular groove is concave and concave, the bottom of the annular groove is concave, the outer sidewall of the annular protrusion is concave and concave, and the connection with the upper mold plate is concave, and both of them form a forming cavity of the O-ring.
8. The O-shaped seal ring mold according to claim 1, wherein a plurality of molding cavities form a molding unit, flow guide grooves are formed in the periphery of the molding unit, and the flow guide grooves are formed in the upper end face of the lower mold plate.
9. A shaping knife is used for processing the annular groove and the annular bulge according to any one of claims 1 to 7, and is characterized by comprising a knife handle and a shaping knife head, wherein the knife handle and the shaping knife head are connected with a numerical control center, the knife handle and the shaping knife head are connected through a transition part, the shaping knife head is arranged at 135 degrees, and the tail end of the shaping knife head is in a semicircular shape.
10. A forming process of an O-shaped sealing ring die is characterized by comprising the steps of forming an annular groove and an annular bulge, wherein the annular groove is integrally formed on a lower die plate, the annular bulge is integrally formed on an upper die plate,
the annular groove forming comprises the following steps:
sa1, machining circular grooves: processing a circular groove by using a milling cutter;
sa2, bevel machining: boring the inner side wall of the circular groove by using a cutter with a 45-degree inclined surface, so that an opening of the inner side wall faces outwards to form an inclined surface, and a first overflow groove is formed at the bottom of the circular groove;
sa3, machining annular grooves: scraping the inclined surface with a forming cutter as claimed in claim 7 so that the upper portion of the inclined surface is outwardly concave and the lower portion is downwardly concave and forms an annular groove having a semicircular cross section;
the annular bulge forming comprises the following steps:
sb1, processing a circular boss, processing the circular boss by using a milling cutter, and forming a second overflow groove around the circular boss;
sb2, machining a conical table, boring the outer side wall of the circular boss by using a cutter with a 45-degree inclined plane, and forming the conical table on the outer side wall;
sb3, processing an annular bulge: the tapered table is shaved by a forming cutter of the type described in claim 7 such that the upper portion of the tapered table is concave and the lower portion is concave and forms an annular protrusion with a cross-section that is semicircular on both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011091578.4A CN112296615B (en) | 2020-10-13 | 2020-10-13 | O-shaped sealing ring die and machining process thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011091578.4A CN112296615B (en) | 2020-10-13 | 2020-10-13 | O-shaped sealing ring die and machining process thereof |
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| CN112296615A true CN112296615A (en) | 2021-02-02 |
| CN112296615B CN112296615B (en) | 2023-03-31 |
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| CN112692313A (en) * | 2020-12-28 | 2021-04-23 | 大连长丰实业总公司 | Numerical control turning tool for machining inner annular groove of O-shaped rubber ring die with die parting surface of 45 degrees |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11170266A (en) * | 1997-12-10 | 1999-06-29 | Nok Corp | Molding mold for rubber product and molding method |
| JP2006076231A (en) * | 2004-09-13 | 2006-03-23 | Kayaba Ind Co Ltd | Sealing ring, method and apparatus for molding sealing ring |
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| CN112296615B (en) | 2023-03-31 |
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