CN101549536A - Mold for oil seal - Google Patents
Mold for oil seal Download PDFInfo
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- CN101549536A CN101549536A CNA2009100839951A CN200910083995A CN101549536A CN 101549536 A CN101549536 A CN 101549536A CN A2009100839951 A CNA2009100839951 A CN A2009100839951A CN 200910083995 A CN200910083995 A CN 200910083995A CN 101549536 A CN101549536 A CN 101549536A
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- lip
- mold
- core rod
- spring groove
- oil seal
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Abstract
The present invention provides a mold for oil seal includes an outside diameter upper mold, an oil seal lip mold core and a spring groove lower mold, the oil seal lip mold core is composed of a semi-minor lip mold core, a main lip and a semi-minor mold core, the main lip and the semi-minor lip mold core follow-up with the spring groove lower mold and the semi-minor lip mold core follow-up with the outside diameter upper mold. Applying the mold for oil seal of the invention can assure the machining accuracy and assembly accuracy easily that assures structure of the lip. No matter how much the compound blank weight differs, as long as it can full fill the cavity that can assure products of the same mold with identical lip structure and identical quality. The mold for oil seal can be used for various molding technics of molding, pressure casting and injection, which is suitable for all forms of oil seal production.
Description
Technical field
The present invention relates to a kind of mould, be specifically related to a kind of mold for oil seal.
Background technology
Oil sealing (oil seal) is the custom appellation of general seal, briefly is exactly the sealing of lubricating oil.As its name suggests: oil sealing is to be used for the mechanical organ of oil sealing (oil is modal liquid substance in the transmission system, also makes a general reference general liquid substance), and it isolates the parts that need in the drive disk assembly to lubricate and the parts of exerting oneself, and is unlikely to allow oil seepage.
Can be divided into various ways and different calls from sealing function, characteristics, structure type, duty and the sealing mechanism etc. of oil sealing, but traditionally generally with rotary shaft lip seal on oil sealing, also there are a lot of reciprocating lip-type packings in society on oil sealing now.Static seal and movable sealing (general move back and forth) with seal seal.
The sealing of oil sealing is to form by the interference fit between a flexible seal (leather, rubber, polytetrafluoroethylene (PTFE), polytrifluorochloroethylene or polyimides etc.) and the rotating shaft.Its sealing mechanism is: simultaneously and deposit dry friction, boundary lubrication and three kinds of situations of fluid lubrication, do not break off a friendship for producing on the contact surface between oil sealing lip and the axle.Dry friction produces wearing and tearing, and fluid lubrication produces and leaks, and under boundary lubrication, forms the stable hydrodynamic oil film of one deck, the about 0.0025mm of oil film thickness between the interface of oil sealing lip and axle; This layer oil film also seals except that as lubricated.Oil film is too thick, and fluid will leak; Oil film is too thin, just can not form the fluid lubrication film, and lip will wear and tear.Therefore, in order to obtain excellent sealing performance and long working life, will ask for help use all and will provide condition in the processing of structural design and product, rubber compounding design and installation for forming thin stabilized uniform borderline oil film.
Oil sealing at first produces prototype in Germany from nineteen twenty-seven, now be widely used in the parts such as engine, gearbox, drive axle of engineering machinery, as the bent axle front and rear oil seals of engine, the front and back output shaft of gearbox, the main reducing gear of drive axle, wheel limit etc. are located, its function is an oil pocket and extraneous the isolation, internally oil sealing, externally dustproof.
The oil enveloping structure pattern of domestic a large amount of employings at present is many, and its basic structure comprises main lip 15, secondary lip 13, skeleton 9 and spring 10.Basic structure as shown in Figure 1.
Main lip is the wedge shape, presses the last item surface at the lip place, plays fluid-encapsulated effect.Generally be made up of with main lip distance value R and spring groove 14 main lip 16, two-way inclination angle A, B, waist inclination angle C and waist thickness changing value L and the spring groove center of circle, material adopts ox-hide, NBR, HNBR, ACM, AEM, FKM, FPM, VMQ, SBR, EPDM, felt, PTFE and PTFE+ rubber+felt combination etc. more.Structure as shown in Figure 2.
Two-way inclination angle A, B are used for balance internal flow and extraneous pressure contrast, reach internal and external equilibrium by design.
Waist inclination angle C and waist thickness changing value L and the spring groove center of circle and main lip distance value R value can be controlled the elasticity and the pressure of main lip, main lip is a sealing elastomer, be designed to still can keep stable sealing function under the influence to the vibration of machinery and fluid-encapsulated pressure oscillation, and play an effect that keeps main lip and axle surface-stable contact condition.
In the time of in oil sealing is fixed on cavity, skeleton 9 plays a part to support and keep external diameter coordinate force, and material adopts carbon steel, stainless steel, aluminium, copper or plastics etc. more.
The factor that influences the oil sealing product quality has a lot, such as, it is unreasonable that material and formula for a product are selected for use; The detection means that production technology is incorrect and unnecessary; Most critical be structural factor, all can cause the factor of structural change, all are the factors that causes quality problems.The mistake of material, reduction be its life-span, the mistake of structure is the life that directly finishes it.In the structure of oil sealing, the most important thing is the lip structure, the factor that influences the lip structure has following aspect:
1. correct mould structure is first prerequisite that ensures the lip structure, does not have correct mould design, the oil sealing product quality of just not knowing where to begin.Current oil sealing mould all is two die sinkings or three-part pattern basically, no matter which kind of mould structure all is the combination of major-minor lip one core rod 3 and spring groove counterdie 2, forms major-minor lip cavity structure 4.Shown in Fig. 3 and 4.But, major-minor lip core rod 3 and spring groove core rod 2 all be servo-actuated in different mould parts, 3 servo-actuateds of major-minor lip one core rod are in external diameter patrix 1, and move up and down with patrix location-plate 11, spring groove counterdie 2 self disjunctor moves up and down with counterdie location-plate 12; Be die sinking, patrix location- plate 11 and 12 counter motions of counterdie location-plate, major-minor lip one core rod 3 separates with spring groove counterdie 2; Matched moulds, patrix location-plate 11 and counterdie location-plate 12 move toward one another, major-minor lip one core rod 3 and 2 combinations of spring groove counterdie.Therefore, the machining accuracy of mould and assembly precision (after being matched moulds, the relative positional accuracy of major-minor lip one core rod 3 and spring groove counterdie 2) are directly determining the structure of major-minor lip A, B, C, L, R.
2. the sizing material stabilized quality guarantees the stable of shrinkage factor.After the oil sealing depanning, lip has contraction, and stable shrinkage factor is second prerequisite that ensures the lip structure.
3. glue embryo, particularity in view of the oil sealing mould structure, the variation of glue embryo size weight, can directly cause the change of oil seal lip structure, because how many instabilities of sizing material, can cause the height difference of upper and lower mould matched moulds, thereby cause major-minor lip one core rod 3 and spring groove counterdie 2 make the oil sealing major-minor lip A that is combined into because of the upper and lower mould die height changes, B, C, L, the R structural change, have a strong impact on product quality, this puts extremely difficult control, because glue embryo weight can not be all the same, the different moulds of same kind can not accomplish that also the die cavity that cuts and assemble out is just the same big.
4. deburring, current lip moulding (A, B angle and R value) has two kinds of technologies: a kind of is the Japanese lip of cutting: behind molding semi product, adjust and remedy the structural failure that sulfuration causes because of glue embryo weight and mold cavity volume difference during matched moulds with deburring machine maintenance lip, each semi-finished product just necessarily have new error to occur but have to adjust, because all can have slight structural failure; Two kinds is American-European formula mold pressing lip: use mould just oil seal lip to be synthesized, during semi-finished product, the major-minor lip is finalized the design, only pare off unnecessary burr, motionless lip (A, B angle and R value) structure, though can evade the deburring error like this, can't solve the oil seal lip structural failure that glue embryo weight and mold cavity volume difference cause.
As seen from last, very important cannot say for sure most again of oil enveloping structure demonstrate,proved, and external flourishing level has been employed high equipment cost for guaranteeing structure, but can't tackle the problem at its root.Therefore, need improve, to obtain constitutionally stable oil sealing product to existing oil sealing mould.
Summary of the invention
The objective of the invention is to address the above problem, a kind of mold for oil seal is provided, machining accuracy and assembly precision all can be guaranteed, obtain stable oil enveloping structure, and can save the trimming error of trimmer fully with this.
The inventor is through a large amount of analysis and research, discovery is out of question by the moulding design principle that major-minor lip one core rod and spring groove counterdie are combined into major-minor procheilon structure, problem be major-minor lip one core rod with the spring groove counterdie all be servo-actuated in different mould parts, i.e. the reason of die sinking separation, matched moulds combination has caused the changeability factor of the lip structure A of oil sealing, B, C, L, R too many and uncontrollable.
In order to realize purpose of the present invention, technical scheme of the present invention is:
A kind of mold for oil seal, it comprises external diameter patrix, oil sealing lip core rod and spring groove counterdie, described oil sealing lip core rod reaches half secondary lip core rod by half secondary lip core rod and main lip and forms, wherein, described main lip and half secondary lip core rod and the servo-actuated of described spring groove counterdie, described half secondary lip core rod and the servo-actuated of described external diameter patrix.
Be that described main lip and half secondary lip core rod and described spring groove counterdie are positioned at same mould position; Described main lip and half secondary lip core rod are fixed in the described spring groove counterdie by the location jump ring, and the two relative slip, guarantee and can slide up and down with this, but can not fall.
Described half secondary lip core rod and described external diameter patrix are positioned at same mould position.Described half secondary lip core rod is fixed in the described external diameter patrix by the location jump ring, and the two relative slip, guarantees and can slide up and down with this, but can not fall.
Described spring groove counterdie is made up of spring groove combination counterdie and spring groove close-fitting embedding core.
Main lip described in the mould of the present invention and half secondary lip core rod, described half secondary lip core rod, described spring groove combination counterdie and spring groove close-fitting embedding core are combined into major-minor lip cavity structure.
During die sinking, described external diameter patrix and half secondary lip core rod servo-actuated together, described main lip and half secondary lip core rod, described spring groove combination counterdie and the servo-actuated together of described spring groove close-fitting embedding core, this three part is not separated.Therefore, guaranteed the structure of oil sealing master lip critical component A, B, C, L, R.
Oil sealing mould of the present invention can be used for the various moulding process of mold pressing, pressure injection, injection, is applicable in the oil sealing production process of form of ownership.
Adopt oil sealing mould of the present invention, machining accuracy guarantees that easily assembly precision guarantees easily, has also just guaranteed the lip structure.No matter glue embryo weight differential is much, as long as can be full of die cavity, just can guarantee same mould product, the lip structure is identical, and quality is identical.
By this stable mold pressing lip mould structure, saved the risk of the trimming error of trimmer fully.Thereby realize that as long as the sizing material process stabilizing the simplest vulcanizing equipment is as long as basic function is up to standard, just can produce the batch oil sealing product of stabilised quality.
Description of drawings
Fig. 1 is the oil enveloping structure schematic diagram;
Fig. 2 is an oil sealing master procheilon structure schematic diagram;
Fig. 3 is the structural representation of existing mold for oil seal;
Fig. 4 is the structural representation of Fig. 3 mould open mode;
Fig. 5 is the structural representation of mold for oil seal of the present invention;
Fig. 6 is the structural representation of Fig. 5 mould open mode;
Fig. 7 is the partial structurtes schematic diagram of the another kind of mold for oil seal of the present invention.
Among the figure:
1 external diameter patrix, 2 spring groove counterdies, 3 major-minor lip one core rods
4 major-minor lip cavity structures, 5 main lips and half secondary lip core rod 6 spring groove close-fitting embedding cores
7 spring grooves combination counterdie, 8 half secondary lip core rod 9 skeletons
10 springs, 11 patrix location-plates, 12 counterdie location-plates
13 secondary lip 14 spring grooves 15 main lips
16 main lip 17,18,19,20 location jump rings
A, C waist inclination angle, the two-way inclination angle of B master's lip L waist gradual change value
The R spring groove center of circle and main lip distance value
The specific embodiment
Following examples are used to illustrate the present invention, but are not used for limiting protection scope of the present invention.
Fig. 5 is the structural representation of mold for oil seal of the present invention; As shown in Figure 5, mold for oil seal of the present invention, it comprises external diameter patrix 1, oil sealing lip core rod and spring groove counterdie, and oil sealing lip core rod reaches half secondary lip core rod 5 by half secondary lip core rod 8 and main lip to be formed, and the spring groove counterdie is made up of spring groove combination counterdie 7 and spring groove close-fitting embedding core 6.
Wherein, main lip and half secondary lip core rod 5 and spring groove combination counterdie 7 and 6 servo-actuateds of spring groove close-fitting embedding core are positioned at counterdie location-plate 12, and half secondary lip core rod 8 and 1 servo-actuated of external diameter patrix is positioned at patrix location-plate 11.
As shown in Figure 6, during die sinking, patrix location- plate 11 and 12 counter motions of counterdie location-plate, external diameter patrix 1 and half secondary lip core rod 8 are positioned at same mould position, servo-actuated together, and main lip and half secondary lip core rod 5, spring groove combination counterdie 7 and spring groove close-fitting embedding core 6 are positioned at same mould position, servo-actuated together, and this three part is not separated.A, B, C, L, the R structure of the crucial main lip spare of oil sealing have been guaranteed.
During matched moulds, patrix location-plate 11 and counterdie location-plate 12 move toward one another, external diameter patrix 1, oil sealing lip core rod and the combination of spring groove counterdie each several part, wherein external diameter patrix 1, half secondary lip core rod 8, main lip and half secondary lip core rod 5, spring groove combination counterdie 7 and spring groove close-fitting embedding core 6 are combined into major-minor lip cavity structure 4.
Major-minor lip cavity structure 4 comprises main lip 15, secondary lip 13 and spring groove 14.The planform of main lip 15 and secondary lip 13 is embodied in half secondary lip core rod 8 and main lip and the half secondary lip core rod 5, and the type matrix of common product trade mark or name of product can be located on the half secondary lip core rod 8, plays the effect of propaganda, protection.
As because of product needed, half secondary lip core rod 8 also can only work to push down skeleton, does not have the structure of secondary lip; At this moment, the structure of secondary lip all embodies in main lip and half secondary lip core rod 5, is another kind of version, as shown in Figure 7.
The architectural feature that is embedded with the oil sealing part (being commonly referred to as the locating support part) of skeleton 9 is embodied in the part of external diameter patrix 1, spring groove combination counterdie 7 and half secondary lip core rod 8.
The miscellaneous part of mold for oil seal of the present invention can adopt the same base part in the existing oil sealing mould.
With the die pressing is example, adopts the process of Mould Machining oil seal of the present invention:
At first, with location jump ring 20,17 main lip and half secondary lip core rod 5 and half secondary lip core rod 8 are separately fixed in spring groove close-fitting embedding core 6 (spring groove close-fitting embedding core 6 close-fittings are embedded in the spring groove combination counterdie 7) and the external diameter patrix 1, can slide and can not fall about making it.Location jump ring the 18, the 19th, respectively with external diameter patrix 1 and patrix location-plate 11, spring groove combination counterdie 7 fixes with counterdie location-plate 12.
Again mould matched moulds in the vulcanizer of folding is up and down pressurizeed, is heated to the production temperature, the patrix location-plate 11 that will move up and down of starting shooting is then opened with counterdie location-plate 12, external diameter patrix 1 and spring groove combination counterdie 7 is separated fully with separately core rod, half secondary lip core rod 8 is by locating 17 one-tenth catenary of jump ring at this moment, and main lip and half secondary lip core rod 5 make up counterdie 7 by conducting oneself with dignity with spring groove close-fitting embedding core 6 and spring groove and combine closely.
Then, with punching press in advance, oil removing, rust cleaning, the skeleton 9 that coats glue is enclosed within on the spring groove combination counterdie 7, ensure the concentricity of skeleton 9 and oil sealing with the support of spring groove combination counterdie 7, again the process batching, refining glue, the good glue embryo of system embryo is put on the skeleton 9, during matched moulds, half secondary lip core rod 8 is by skeleton 9 and glue embryo top return, main lip and half secondary lip core rod 5, spring groove close-fitting embedding core 6, spring groove combination counterdie 7 mutual alignments are constant all the time, the machine pressurization, heat, make sizing material become semi liquid state and under pressure, be full of major-minor lip cavity structure 4 in moment, and bonding with skeleton 9 parcels, self begin sulfuration simultaneously, it is solid-state to become rubber.
Molding time, after temperature reaches, start is opened the patrix location-plate 11 that moves up and down with counterdie location-plate 12, in the opening procedure, by external diameter patrix 1 and half secondary lip core rod 8 combinations the oil sealing in the major-minor lip cavity structure 4 is extracted from spring groove combination counterdie 7 and spring groove close-fitting embedding core 6 earlier, main lip and half secondary lip core rod 5 servo-actuateds are risen in external diameter patrix 1 and half secondary lip core rod 8, when the location jump ring 20 that rises to main lip and half secondary lip core rod 5 blocks spring groove close-fitting embedding core 6 when motionless, location jump ring 20 is extracted main lip and half secondary lip core rod 5 from the oil sealing external diameter patrix 1 and half secondary lip core rod 8, main lip and half secondary lip core rod 5 are by the deadweight return, external diameter patrix 1 and half secondary lip core rod 8 are being with oil sealing to continue to rise, at this moment, thimble on the machine begins half secondary lip core rod 8 is pushed up downwards from half secondary lip core rod 1, push up the location jump ring 17 of half secondary lip core rod 8 will half secondary lip core rod 8 fastenings on half secondary lip core rod 1 when motionless, oil sealing is ejected from half secondary lip core rod 1.Thereby finished a production process.Can begin next production process more subsequently, back and forth carry out.
Adopt oil sealing mould of the present invention, machining accuracy guarantees that easily assembly precision guarantees easily, has also just guaranteed the lip structure.No matter glue embryo weight differential is much, as long as can be full of die cavity, just can guarantee same mould product, the lip structure is identical, and quality is identical.
By this stable mold pressing lip mould structure, saved the risk of the trimming error of trimmer fully.Thereby realize that as long as the sizing material process stabilizing the simplest vulcanizing equipment is as long as basic function is up to standard, just can produce the batch oil sealing product of stabilised quality.
Oil sealing mould of the present invention can be used for the various moulding process of mold pressing, pressure injection, injection, is applicable in the oil sealing production process of form of ownership.
Though above the present invention is described in detail with a general description of the specific embodiments, on basis of the present invention, can make some modifications or improvements it, this will be apparent to those skilled in the art.Therefore, these modifications or improvements all belong to the scope of protection of present invention without departing from theon the basis of the spirit of the present invention.
Claims (6)
1, a kind of mold for oil seal, it is characterized in that, it comprises external diameter patrix, oil sealing lip core rod and spring groove counterdie, described oil sealing lip core rod reaches half secondary lip core rod by half secondary lip core rod and main lip and forms, described main lip and half secondary lip core rod and the servo-actuated of described spring groove counterdie, described half secondary lip core rod and the servo-actuated of described external diameter patrix.
2, mold for oil seal according to claim 1 is characterized in that, described main lip and half secondary lip core rod and described spring groove counterdie are positioned at same mould position.
As mold for oil seal as described in the claim 2, it is characterized in that 3, described main lip and half secondary lip core rod are fixed in the described spring groove counterdie by the location jump ring, and the two relative slip.
4, mold for oil seal according to claim 1 is characterized in that, described half secondary lip core rod and described external diameter patrix are positioned at same mould position.
5, mold for oil seal according to claim 1 is characterized in that, described half secondary lip core rod is fixed in the described external diameter patrix by the location jump ring, and the two relative slip.
6, as mold for oil seal as described in any one of the claim 1-5, it is characterized in that described spring groove counterdie is made up of spring groove combination counterdie and spring groove close-fitting embedding core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100839951A CN101549536B (en) | 2009-05-15 | 2009-05-15 | Mold for oil seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100839951A CN101549536B (en) | 2009-05-15 | 2009-05-15 | Mold for oil seal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101549536A true CN101549536A (en) | 2009-10-07 |
| CN101549536B CN101549536B (en) | 2011-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100839951A Active CN101549536B (en) | 2009-05-15 | 2009-05-15 | Mold for oil seal |
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| CN (1) | CN101549536B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102101333A (en) * | 2010-12-17 | 2011-06-22 | 哈尔滨东安实业发展有限公司 | Preparation method of die device of double-skeleton spark plug guide rod oil seal |
| CN102173023A (en) * | 2011-01-08 | 2011-09-07 | 山东莱阳市昌誉密封产品有限公司 | One-time compression molding method of modified polytetrafluoroethylene oil seal and special mold thereof |
| CN102601986A (en) * | 2012-03-16 | 2012-07-25 | 重庆天工油封有限公司 | Oil seal mould |
| CN104175499A (en) * | 2014-07-08 | 2014-12-03 | 安徽省宁国宁阳量清模具科技有限公司 | Wave type lip processing mould |
| CN105171977A (en) * | 2015-08-27 | 2015-12-23 | 成都盛帮密封件股份有限公司 | Semi-encapsulated oil sealing die and vulcanizing production process |
| CN107718406A (en) * | 2017-11-10 | 2018-02-23 | 郭彩娇 | Mold for oil seal |
| CN108973030A (en) * | 2018-09-28 | 2018-12-11 | 安徽宁国中鼎模具制造有限公司 | A kind of modified oil sealing class mold |
| CN109367033A (en) * | 2018-10-18 | 2019-02-22 | 吉林省红星轨道车辆装备有限公司 | A kind of composite gland bush processing method |
-
2009
- 2009-05-15 CN CN2009100839951A patent/CN101549536B/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102101333A (en) * | 2010-12-17 | 2011-06-22 | 哈尔滨东安实业发展有限公司 | Preparation method of die device of double-skeleton spark plug guide rod oil seal |
| CN102101333B (en) * | 2010-12-17 | 2012-12-05 | 哈尔滨东安实业发展有限公司 | Preparation method of die device of double-skeleton spark plug guide rod oil seal |
| CN102173023A (en) * | 2011-01-08 | 2011-09-07 | 山东莱阳市昌誉密封产品有限公司 | One-time compression molding method of modified polytetrafluoroethylene oil seal and special mold thereof |
| CN102601986A (en) * | 2012-03-16 | 2012-07-25 | 重庆天工油封有限公司 | Oil seal mould |
| CN104175499A (en) * | 2014-07-08 | 2014-12-03 | 安徽省宁国宁阳量清模具科技有限公司 | Wave type lip processing mould |
| CN105171977A (en) * | 2015-08-27 | 2015-12-23 | 成都盛帮密封件股份有限公司 | Semi-encapsulated oil sealing die and vulcanizing production process |
| CN107718406A (en) * | 2017-11-10 | 2018-02-23 | 郭彩娇 | Mold for oil seal |
| CN108973030A (en) * | 2018-09-28 | 2018-12-11 | 安徽宁国中鼎模具制造有限公司 | A kind of modified oil sealing class mold |
| CN108973030B (en) * | 2018-09-28 | 2023-09-15 | 安徽宁国中鼎模具制造有限公司 | Improved oil seal mold |
| CN109367033A (en) * | 2018-10-18 | 2019-02-22 | 吉林省红星轨道车辆装备有限公司 | A kind of composite gland bush processing method |
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|---|---|
| CN101549536B (en) | 2011-05-18 |
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