CN101412273B - Once-forming mould for rotary shaft lip seal and moulding method thereof - Google Patents
Once-forming mould for rotary shaft lip seal and moulding method thereof Download PDFInfo
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- CN101412273B CN101412273B CN2008102188912A CN200810218891A CN101412273B CN 101412273 B CN101412273 B CN 101412273B CN 2008102188912 A CN2008102188912 A CN 2008102188912A CN 200810218891 A CN200810218891 A CN 200810218891A CN 101412273 B CN101412273 B CN 101412273B
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Abstract
The invention relates to a one-step forming die for a rotary shaft lip-shaped seal, and a forming method thereof. The forming die is provided with an upper die and a lower die, wherein the lower die is provided with a lip cavity, the front lip angle of the lip cavity is between 40 and 50 degrees, and the rear lip angle of the lip cavity is between 20 and 30 degrees; when the upper die and the lower die are matched with each other, the off-centering distance between the tip of the lip cavity and a convex ring of the upper die is between 0.25 and 0.55 millimeter; and the die inner diameter of the tip of the lip cavity is equal to the inner diameter of a seal ring lip plus the rubber shrinking value, and the shrinking value is between 0.3 and 0.5 millimeter. The forming method comprises the following steps: adopting the forming die, putting a framework into the forming die as a support, pouring rubber into the forming die, vulcanizing the framework enwrapped by the rubber, performing one-step forming on the framework, and mounting a spring on the framework to form a rotary shaft lip seal. The forming die and the forming method have the advantages of simple die structure, convenient forming, one-step forming, no secondary lip refit and forming, and removal of the hidden trouble of the seal ring failure, thus the forming die and the forming method are applicable to processing the rotary shaft lip seal.
Description
Technical field
The present invention relates to a kind of rotary shaft lip seal one-time-shaped mould and forming method thereof.
Background technology
Chinese patent 96228702.4,98209702.6,200420022202.8 all discloses the structure of this product of rotary shaft lip seal, be as support with skeleton, wrapping frame moulding after the vulcanization of rubber, with the lip is the seal operation position, the traditional diamond-making technique of this product is after traditional processing mold of employing Fig. 1 makes the vulcanization of rubber, by calculating the renovation process parameter, adopt the cutter trimming and the formation lip; But, for the rubber after the sulfuration, the fluorubber of material excellence particularly, the intensity height very easily produces wearing and tearing to sharp point of a knife, perhaps, the sharp inadequately or damage of the point of a knife of trimming product has a spot of impurity in the rubber and also can damage point of a knife, if can cause the product lip to produce burr, form zigzag etc., make it cooperate the hidden danger that has leakage when sealing with axle.Simultaneously, when the moulding second time was promptly rebuild moulding, the unsettled randomness of quality appearred in the product that also can produce different batches, to the production and the very inconvenience of management of product.
Summary of the invention
The objective of the invention is at above-mentioned existing problems, provide that a kind of mould structure is simple, convenient formation, one-shot forming, need not rebuild the rotary shaft lip seal one-time-shaped mould and the forming method thereof of moulding lip for the second time.
Rotary shaft lip seal one-time-shaped mould of the present invention has upper die and lower die, and counterdie is provided with the lip chamber, and the preceding labial angle in this lip chamber is 45 ± 5 degree, and the back labial angle in this lip chamber is 25 ± 5 degree; When patrix and counterdie matched moulds, the off-centring of the cusp in lip chamber and the bulge loop of patrix distance is 0.25～0.55mm; The mould interior diameter of the cusp in lip chamber is that the interior diameter of sealing ring lip adds rubber shrink value, and its shrink value is 0.3～0.5mm.
The present invention can be reserved with the forming cavity of the upper boss of molded sealing ring lip on the top in lip chamber, and the boss of sealing ring can further be got rid of the hidden danger that sealing ring lost efficacy.
Forming method of the present invention comprises:
1), its one-time-shaped mould comprises upper die and lower die, directly is processed with the lip chamber at counterdie, the preceding labial angle in this lip chamber is 45 ± 5 degree, the back labial angle in this lip chamber is 25 ± 5 degree; When patrix and counterdie matched moulds, the off-centring of the cusp in lip chamber and the bulge loop of patrix distance is 0.25～0.55mm; The mould interior diameter of the cusp in lip chamber is that the interior diameter of sealing ring lip adds rubber shrink value, and its shrink value is 0.3～0.5mm;
2), adopt above-mentioned one-time-shaped mould, insert skeleton as support, inject rubber, rubber wrapping frame sulfuration back one-shot forming, mounting spring, and become rotary shaft lip seal.
The further improvement of forming method of the present invention comprises:
1), its one-time-shaped mould comprises upper die and lower die, directly is processed with the lip chamber at counterdie, the preceding labial angle in this lip chamber is 45 ± 5 degree, the back labial angle in this lip chamber is 25 ± 5 degree; When patrix and counterdie matched moulds, the off-centring of the cusp in lip chamber and the bulge loop of patrix distance is 0.25～0.55mm; The mould interior diameter of the cusp in lip chamber is that the interior diameter of sealing ring lip adds rubber shrink value, and its shrink value is 0.3～0.5mm; Be reserved with the forming cavity of the upper boss of molded sealing ring lip on the top in lip chamber;
2), adopt above-mentioned one-time-shaped mould, insert skeleton as support, inject rubber, rubber wrapping frame sulfuration back one-shot forming, the sulfuration burr of the upper boss of flat cutter finishing sealing ring lip, mounting spring, and become rotary shaft lip seal.
Beneficial effect of the present invention is:
1), to the related dimensionally-optimised design of mould, one one is put in place, its forming die structure is simple, convenient formation replaces post forming by one-shot forming, need not to carry out any calculating, reduce the cost loss of transferring chance error mistake mistake to be brought, get rid of the hidden danger that sealing ring lost efficacy, thereby, outstanding substantive distinguishing features had;
2), replace post forming by one-shot forming, steady quality not only, operating efficiency also improves greatly, thereby, have obvious improvement.
Thereby the present invention has that mould structure is simple, convenient formation, one-shot forming, need not rebuild the moulding lip for the second time, gets rid of the advantage of the hidden danger that sealing ring lost efficacy, and is applicable to the processing of rotary shaft lip seal.
The present invention is further illustrated in conjunction with the accompanying drawings for following embodiment.
Description of drawings
Fig. 1 is the mould structure schematic diagram of an embodiment of traditional diamond-making technique;
Fig. 2 is the structural representation of the post forming of the rotary shaft lip seal after the processing of Fig. 1 traditional moulds;
Fig. 3 is the mould structure schematic diagram of one embodiment of the present of invention;
Fig. 4 is the one-time formed structural representation of the rotary shaft lip seal after the Mould Machining of Fig. 3 of the present invention.
Among the figure, 1, patrix, 2, counterdie, 3, the lip chamber, 4, the cusp in lip chamber, 5, bulge loop, 6, skeleton, 7, rotary shaft lip seal, 8, boss, 9, forming cavity, 10, the sulfuration burr, 11, spring, 12, lip, 13, lip trimming portion;
α, preceding labial angle, β, back labial angle, R, off-centring distance, ID
m, the lip chamber the mould interior diameter of cusp, the interior diameter of ID, sealing ring lip.
The specific embodiment
Embodiment 1: a kind of rotary shaft lip seal one-time-shaped mould
With reference to Fig. 3, be the mould structure of one embodiment of the present of invention, among the figure, the side form of this mould structure does not illustrate; The mould structure of this embodiment of the present invention has patrix 1 and counterdie 2, and counterdie 2 is provided with lip chamber 3, and the preceding labial angle α in this lip chamber 3 is 45 ± 5 degree, and the back labial angle β in this lip chamber 3 is 25 ± 5 degree; When patrix 1 and counterdie 2 matched moulds, the cusp 4 in lip chamber is 0.25～0.55mm with the off-centring distance R of the bulge loop 5 of patrix 1; The mould interior diameter ID of the cusp 4 in lip chamber
mFor the interior diameter ID of sealing ring lip adds rubber shrink value, its shrink value is 0.3～0.5mm; Be reserved with the forming cavity 9 of the upper boss 8 of molded sealing ring lip 12 on the top in lip chamber 3, the boss 8 of sealing ring can further be got rid of the hidden danger that sealing ring lost efficacy.
The difference of traditional processing mold of the present invention and Fig. 1 mainly is counterdie, and promptly traditional processing mold does not have the lip of direct one-shot forming rotary shaft lip seal, and its lip need moulding when rebuilding for the second time.
Embodiment 2: a kind of rotary shaft lip seal one-step moulding method
With reference to Fig. 3, Fig. 4, this one-step moulding method comprises:
1), its one-time-shaped mould comprises patrix 1 and counterdie 2, directly is processed with lip chamber 3 at counterdie 2, the preceding labial angle α in this lip chamber 3 is 45 ± 5 degree, the back labial angle β in this lip chamber 3 is 25 ± 5 degree; When patrix 1 and counterdie 2 matched moulds, the cusp 4 in lip chamber is 0.25～0.55mm with the off-centring distance R of the bulge loop 5 of patrix 1; The mould interior diameter ID of the cusp 4 in lip chamber
mFor the interior diameter ID of sealing ring lip adds rubber shrink value, its shrink value is 0.3～0.5mm; Be reserved with the forming cavity 9 of the upper boss 8 of molded sealing ring lip 12 on the top in lip chamber 3;
2), adopt above-mentioned one-time-shaped mould, insert skeleton 6 as supporting, inject rubber, the 6 sulfuration back one-shot formings of rubber wrapping frame, the sulfuration burr 10 of the upper boss 8 of flat cutter finishing sealing ring lip 12, mounting spring 11, and become rotary shaft lip seal 7; What deserves to be mentioned is, the excision of these sulfuration burr 10, because of the excision portion of sulfuration burr does not relate to the seal operation position, so, the excision nonfertilization degree restriction of sulfuration burr 10, just for attractive in appearance and a little finishing get final product.
The lip 12 of the rotary shaft lip seal after the Mould Machining of employing Fig. 3 is one-shot forming, its lip 12 need not be rebuild moulding for the second time, and the rotary shaft lip seal of the moulding of traditional processing mold of Fig. 1, need be when rebuilding for the second time during precise forming, as shown in Figure 2, the accurate lip trimming portion 13 of excising, the lip of decision rotary shaft lip seal seal operation after obtaining.
One-step moulding method of the present invention, in the sealing ring sulfidization molding, the just moulding of the shape of lip, only need flat cutter to remove overlap in the trimming operation, just promptly repair a little can, need not to carry out any calculating, reduce the cost loss of transferring chance error mistake mistake to be brought, because of sealing ring of the present invention has a boss 8 on lip top, further get rid of the hidden danger that sealing ring lost efficacy.
Claims (3)
1. rotary shaft lip seal one-time-shaped mould, have patrix (1) and counterdie (2), it is characterized in that: described counterdie (2) is provided with lip chamber (3), and the preceding labial angle (α) in this lip chamber (3) is 45 ± 5 degree, and the back labial angle (β) in this lip chamber (3) is 25 ± 5 degree; When described patrix (1) and counterdie (2) matched moulds, the cusp (4) in described lip chamber is 0.25～0.55mm with the off-centring distance (R) of the bulge loop (5) of patrix (1); Mould interior diameter (the ID of the cusp (4) in described lip chamber
m) for the interior diameter (ID) of sealing ring lip adds rubber shrink value, its shrink value is 0.3～0.5mm.
2. the one-step moulding method of a rotary shaft lip seal comprises:
1), its one-time-shaped mould comprises patrix (1) and counterdie (2), directly is processed with lip chamber (3) at counterdie (2), the preceding labial angle (α) in this lip chamber (3) is 45 ± 5 degree, the back labial angle (β) in this lip chamber (3) is 25 ± 5 degree; When described patrix (1) and counterdie (2) matched moulds, the cusp (4) in described lip chamber is 0.25～0.55mm with the off-centring distance (R) of the bulge loop (5) of patrix (1); Mould interior diameter (the ID of the cusp (4) in described lip chamber
m) for the interior diameter (ID) of sealing ring lip adds rubber shrink value, its shrink value is 0.3～0.5mm;
2), adopt above-mentioned one-time-shaped mould, insert skeleton (6) as supporting, inject rubber, rubber wrapping frame (6) sulfuration back one-shot forming, mounting spring (11), and become rotary shaft lip seal (7).
3. the one-step moulding method of a rotary shaft lip seal comprises:
1), its one-time-shaped mould comprises patrix (1) and counterdie (2), directly is processed with lip chamber (3) at counterdie (2), the preceding labial angle (α) in this lip chamber (3) is 45 ± 5 degree, the back labial angle (β) in this lip chamber (3) is 25 ± 5 degree; When described patrix (1) and counterdie (2) matched moulds, the cusp (4) in described lip chamber is 0.25～0.55mm with the off-centring distance (R) of the bulge loop (5) of patrix (1); Mould interior diameter (the ID of the cusp (4) in described lip chamber
m) for the interior diameter (ID) of sealing ring lip adds rubber shrink value, its shrink value is 0.3～0.5mm; Be reserved with the forming cavity (9) of the upper boss (8) of molded sealing ring lip (12) on the top in described lip chamber (3);
2), adopt above-mentioned one-time-shaped mould, insert skeleton (6) as supporting, inject rubber, rubber wrapping frame (6) sulfuration back one-shot forming, the sulfuration burr (10) of the upper boss (8) of flat cutter finishing sealing ring lip (12), mounting spring (11), and become rotary shaft lip seal (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102188912A CN101412273B (en) | 2008-11-01 | 2008-11-01 | Once-forming mould for rotary shaft lip seal and moulding method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102188912A CN101412273B (en) | 2008-11-01 | 2008-11-01 | Once-forming mould for rotary shaft lip seal and moulding method thereof |
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| Publication Number | Publication Date |
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| CN101412273A CN101412273A (en) | 2009-04-22 |
| CN101412273B true CN101412273B (en) | 2010-08-11 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI386571B (en) * | 2010-10-22 | 2013-02-21 | Mfc Sealing Technology Company Ltd | Magnetic sets of spring fixture |
| CN102357956B (en) * | 2011-10-27 | 2013-09-04 | 揭阳市天诚密封件有限公司 | Vulcanizing method of multifunctional hub oil seal |
| CN103144224B (en) * | 2013-02-26 | 2016-05-04 | 贵州红阳机械(集团)公司 | A kind of 45 ° of O RunddichtringO moulds and processing method thereof |
| CN107650312A (en) * | 2017-09-22 | 2018-02-02 | 台州市黄岩迅发橡塑制品厂（普通合伙） | A kind of making mould of silica gel cup, preparation method and products thereof |
| CN108790015A (en) * | 2018-04-23 | 2018-11-13 | 中国航发哈尔滨东安发动机有限公司 | A kind of processing method of metallic framework rubber sheet gasket |
| CN115122695B (en) * | 2022-07-06 | 2023-08-25 | 成都国营锦江机器厂 | Rotary shaft lip-shaped sealing ring with elastic element and preparation method thereof |
| CN116277667B (en) * | 2023-05-18 | 2023-08-04 | 扬中市天成密封科技有限公司 | Sealing washer processingequipment |
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Address after: To the north of Guangdong city of Jieyang province Jieyang 522000 industrial transfer Industrial Park Road, Chaoyang West Songtao Street Patentee after: Guangdong Tiancheng seal Limited by Share Ltd Address before: East Rong Dong Industrial Zone 522000 Guangdong Fenglin District of Rongcheng city in Jieyang Province Patentee before: Jieyang Tiancheng Seal Components Co., Ltd. |