CN100393796C - Polytetrafluoroethylene oil seals and production thereof - Google Patents
Polytetrafluoroethylene oil seals and production thereof Download PDFInfo
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- CN100393796C CN100393796C CNB2006100420910A CN200610042091A CN100393796C CN 100393796 C CN100393796 C CN 100393796C CN B2006100420910 A CNB2006100420910 A CN B2006100420910A CN 200610042091 A CN200610042091 A CN 200610042091A CN 100393796 C CN100393796 C CN 100393796C
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Abstract
The present invention discloses a polytetrafluoroethylene oil seal containing 60 to 80 wt% of polytetrafluoroethylene, 10 to 30 wt% of glass fiber and 5 to 10 wt% of molybdenum disulfide. The polytetrafluoroethylene oil seal is prepared by material proportioning, material mixing, pressing, sintering, sheet processing, surface treatment, sheet bonding, vulcanization and finishing. Polytetrafluoroethylene is adopted as a raw material to produce the oil seal. The produced oil seal has the characteristics of wide medium resistance range, high and low temperature resistance, small friction coefficient, good weatherability and long service life, and is suitable for an engine with a high rotary speed.
Description
One, technical field
The invention belongs to the engine oil seal technical field, especially relate to a kind of polytetrafluoroethyloil oil seals production method.
Two, background technology
The oil sealing of engine generally adopts rubber to process as raw material at present, though the oil sealing of rubber material plays certain sealing function, but because the restriction of its rubber self character, there are a large amount of problems, at sulfur-bearing, extreme pressure agents such as phosphorus, under the harsh sour oil environment, rubber oil sea is difficult to be competent at, the rubber oil sea maximum speed is 25m/ second, be not suitable for the needs of high-speed engine, the rubber oil sea heatproof is up to 200 ℃, low temperature-40 ℃, limited its use range, the frictional coefficient of rubber is bigger, be generally 〉=0.7, the weathering resistance of rubber is relatively poor simultaneously, rubber oil sea is in 2 years left and right sides loss of performance of outdoor exposure, and work-ing life is short; The appearance of materials such as tetrafluoroethylene, make instead of rubber become possibility as producing the squalid raw material, but because tetrafluoroethylene and rubber difficulty are bonding, because PTFE is the perfluor homopolymer, because molecular chain regularity and molecular symmetry, stability is high, and viscosity does not increase, can not be bonding with usual way, and the modification difficulty is big.Because material itself has " cold flow properties ".Intensity is low, wears no resistance.The easy conglomeration of normal temperature, the difficult dispersion.Common hybrid technology can't solve, and can't use tetrafluoroethylene to produce engine oil seal always.
Three, goal of the invention
The objective of the invention is to improve the deficiency of prior art and a kind of employing tetrafluoroethylene is provided is the raw material production oil sealing, and the oil sealing of production has that wide, the suitable rev-happy engine of media-resistant scope, high-low temperature resistant, frictional coefficient are little, the polytetrafluoroethyloil oil seals and the production method thereof of good weatherability, long service life.
The object of the present invention is achieved like this, and a kind of polytetrafluoroethyloil oil seals is characterized in that this oil sealing comprises (weight percent) tetrafluoroethylene 60-80%, glass fibre 10-30%, molybdenumdisulphide 5-10%.
In order further to realize purpose of the present invention, that polytetrafluoroethyloil oil seals of the present invention is this oil sealing is bonding through batching, batch mixing, compacting, sintering, sheet processing, surface treatment, sheet, sulfuration, arrangement form, specific as follows:
A, batching, automatically weigh per-cent is that the tetrafluoroethylene of 60-80%, the glass fibre of 10-30%, the molybdenumdisulphide of 5-10% are prepared burden, batching finishes to change over to after the assay was approved batch mixing;
B, batch mixing are poured the material for preparing into automatic mixer and are carried out batch mixing, and mixing, mixing time are at 20-60S, and rotating speed is 3000 rev/mins;
C, compacting, former powder behind the mixing is sieved back the adding rapidly in the plastics hydraulic forming machine mold cavity, under room temperature 20-25 ℃ condition, treat that with the speed pressurization of 10MPa/min gauge pressure reaches the 2MPa venting, rise to the preload pressure pressurize, dwell pressure after pressurize 20-50 minute, takes out prefabrication at 5-20MPa;
D, sintering are put into sintering oven with the prefabrication that suppresses, and carry out sintering by sintering process parameter, and the sintering parameter is:
Under 25 ℃ of conditions of room temperature, rise to 375 ℃ by room temperature, temperature rise rate is 80 ℃/h, the control heating-up time is between 4 hours 10 minutes to 4 hours 35 minutes;
Keep temperature be 375 ℃ 5 hours;
Temperature is reduced to 200 ℃ by 375 ℃, and rate of temperature fall is 40 ℃/h, and the control temperature fall time is between 4 hours 10 minutes to 4 hours 35 minutes;
Temperature naturally cools to room temperature by 200 ℃;
After sintering finishes, take out goods;
E, sheet processing are contained in digital controlled lathe with bar behind the sintering and process, and the thickness of the sheet that processing obtains is between 0.6-1.2mm;
F, surface treatment, the sheet that processes is put into tetrafluoroethylene handle the line processing, put into 50 ℃ of baking oven preheating 15-30min, to protect atmospheric pressure to transfer to 0.15-0.25Mpa, in treatment trough, feed protection gas, teflon plate after the preheating is immersed in the treatment solution 3-5min takes out and put into rinse bath and clean, clean and put into 80 ℃ of dry 20-30 of baking oven minutes after finishing, take out and dry in the air to room temperature;
G, sheet are bonding, the teflon plate after the surface treatment are placed on the automatic glue spreaders gluing, plastic emitting pressure: 0.5-1.0Kg/cm
2
H, sulfuration are placed on the glue-coated teflon plate in surface in the vacuum oil sealing rubber vulcanizing machine mould keep certain hour under certain temperature and pressure, carry out moulding, pressure: 10-15Mpa, time: 3-5min, temperature: 195 ± 5 ℃;
I, arrangement are put into the oil sealing trimming machine with the sulfurized oil sealing and are repaired, check, pack, put in storage.
Compared with the prior art the present invention has following distinguishing feature and positively effect: it is raw material that the present invention adopts tetrafluoroethylene,, sulfuration bonding through batching, batch mixing, compacting, sintering, sheet processing, surface treatment, sheet, arrangement and make oil sealing.Polytetrafluoroethylmaterial material adopted dose nano-material modifiedly, increase its intensity and wear resistance; Take special mixing equipment and envrionment temperature, control of process parameters, solved its difficult dispersion; Adopt the state-of-the-art TNJ process of surface treatment in the world today, the surface of polytetrafluoroethylmaterial material has been activated, strengthened the avidity with other material, thoroughly solved the bonding problem of tetrafluoroethylene and rubber.Stripping strength＞8KN/M after in-35 ℃ of-180 ℃ of intervals, alternately testing 6 months.
Tetrafluoroethylene engine oil seal of the present invention, can be competent at extreme pressure agents such as sulfur-bearing, phosphorus, use under the harsh sour oil environment, polytetrafluoroethyloil oil seals changes scooter 35m/ second, high-low temperature resistant, polytetrafluoroethyloil oil seals heatproof are up to 260 ℃, and low temperature is-60 ℃, coefficient of friction≤0.2 does not have noticeable change in outdoor exposure outward appearance more than 6 years and mechanical property.
Four, specific embodiments
Embodiment 1, a kind of polytetrafluoroethyloil oil seals is that this oil sealing comprises (weight percent) tetrafluoroethylene 60-80%, glass fibre 10-30%, molybdenumdisulphide 5-10%,, sulfuration bonding through batching, batch mixing, compacting, sintering, sheet processing, surface treatment, sheet, arrangement form; Batching adopts the DNP-1 automatic batching system, after the adjustment balance, carries out automatic weighing by the prescription requirement, and present embodiment is to take by weighing 70 kilograms of tetrafluoroethylene, 20 kilograms in glass fibre, and 10 kilograms of molybdenumdisulphide, batching finishes to change over to after the assay was approved batch mixing; Batch mixing adopts the automatic mixer of SHR-10A, pours material into automatic mixer and carries out batch mixing, and mixing, mixing time are 20-60 second, and for guaranteeing that the each batch mixing capacity of compounding effect is 9L, rotating speed keeps 3000 rev/mins; Compacting, adopt Y/TD71-100A plastics hydraulic forming machine, former powder behind the mixing is sieved back rapid the adding in the mold cavity, in room temp under 20-25 ℃ of condition, treat that with the speed pressurization of 10MPa/min gauge pressure reaches the 2MPa venting, rise to the preload pressure pressurize, dwell pressure is at 5-20MPa, after pressurize 20-50 minute, take out prefabrication; Sintering adopts the 151A sintering oven, and the prefabrication that suppresses is put into sintering oven, carries out sintering by sintering process parameter, after sintering finishes, takes out goods, and room temperature is with 25 ℃ of calculating, parameter such as following table:
| The sintering program | Temperature control speed | Period |
| Room temperature → 375 ℃ | 80℃/h | 4 hours 23 minutes |
| 375 ℃ of insulations | 5 hours | |
| 375℃→200℃ | 40℃/h | 4 hours 23 minutes |
| 200 ℃ → room temperature | Naturally cooling |
The CJK0632 digital controlled lathe is adopted in sheet processing, bar behind the sintering is contained in digital controlled lathe, the thickness 0.6-1.2mm of the sheet that processes; Surface treatment, adopt the FY01.02.03 tetrafluoroethylene to handle line, the sheet that processes is put into 50 ℃ of baking oven preheating 15-30min, to protect atmospheric pressure to transfer to 0.15-0.25Mpa, in treatment trough, feed protection gas, teflon plate after the preheating is immersed in the treatment solution 3-5min takes out and put into rinse bath and clean, clean and put into 80 ℃ of dry 20-30 of baking oven minutes after finishing, take out and dry in the air to room temperature; Sheet is bonding, adopts the TT501E automatic glue spreaders, and the teflon plate after the surface treatment is placed on the automatic glue spreaders gluing, and plastic emitting pressure is 0.5-1.0Kg/cm
2THP-V-100-2RT vacuum oil sealing rubber vulcanizing machine is adopted in sulfuration, the glue-coated teflon plate in surface is placed in the mould keep certain hour under certain temperature and pressure, carry out moulding, pressure: 10-15Mpa, time: 3-5min, temperature: 195 ± 5 ℃; G12-2 oil sealing trimming machine is adopted in arrangement, and the sulfurized oil sealing is repaired, and inspection, packing, warehouse-in get final product.
Embodiment 2, a kind of polytetrafluoroethyloil oil seals is that this oil sealing comprises (weight percent) tetrafluoroethylene 60-80%, glass fibre 10-30%, molybdenumdisulphide 5-10%,, sulfuration bonding through batching, batch mixing, compacting, sintering, sheet processing, surface treatment, sheet, arrangement form; Batching adopts the DNP-1 automatic batching system, adjust balance after, carry out automatic weighing by the prescription requirement, present embodiment is to take by weighing 60 kilograms of tetrafluoroethylene, 30 kilograms in glass fibre, 10 kilograms of molybdenumdisulphide, other and embodiment 1 are identical.
Embodiment 3, a kind of polytetrafluoroethyloil oil seals is that this oil sealing comprises (weight percent) tetrafluoroethylene 60-80%, glass fibre 10-30%, molybdenumdisulphide 5-10%,, sulfuration bonding through batching, batch mixing, compacting, sintering, sheet processing, surface treatment, sheet, arrangement form; Batching adopts the DNP-1 automatic batching system, adjust balance after, carry out automatic weighing by the prescription requirement, present embodiment is to take by weighing 80 kilograms of tetrafluoroethylene, 10 kilograms in glass fibre, 10 kilograms of molybdenumdisulphide, other and embodiment 1 are identical.
Embodiment 4, a kind of polytetrafluoroethyloil oil seals is that this oil sealing comprises (weight percent) tetrafluoroethylene 60-80%, glass fibre 10-30%, molybdenumdisulphide 5-10%,, sulfuration bonding through batching, batch mixing, compacting, sintering, sheet processing, surface treatment, sheet, arrangement form; Batching adopts the DNP-1 automatic batching system, adjust balance after, carry out automatic weighing by the prescription requirement, present embodiment is to take by weighing 75 kilograms of tetrafluoroethylene, 20 kilograms in glass fibre, 5 kilograms of molybdenumdisulphide, other and embodiment 1 are identical.
Present embodiment has only provided a kind of concrete enforcement concrete scheme of the present invention; concrete equipment and parameter that the content that the present invention protected not only is confined to embodiment and is provided; can be by putting into practice the present invention, as long as this method does not exceed scope of the present invention with aiming at the embodiment diverse ways of setting forth usefulness.
Claims (1)
1. polytetrafluoroethyloil oil seals production method is characterized in that this oil sealing is bonding through batching, batch mixing, compacting, sintering, sheet processing, surface treatment, sheet, sulfuration, arrangement form, and be specific as follows:
A, batching, automatically weigh per-cent is that the tetrafluoroethylene of 60-80%, the glass fibre of 10-30%, the molybdenumdisulphide of 5-10% are prepared burden, batching finishes to change over to after the assay was approved batch mixing;
B, batch mixing are poured the material for preparing into automatic mixer and are carried out batch mixing, and mixing, mixing time are at 20-60S, and rotating speed is 3000 rev/mins;
C, compacting, former powder behind the mixing is sieved back the adding rapidly in the plastics hydraulic forming machine mold cavity, under room temperature 20-25 ℃ condition, treat that with the speed pressurization of 10MPa/min gauge pressure reaches the 2MPa venting, rise to the preload pressure pressurize, dwell pressure after pressurize 20-50 minute, takes out prefabrication at 5-20MPa;
D, sintering are put into sintering oven with the prefabrication that suppresses, and carry out sintering by sintering process parameter, and the sintering parameter is:
Under 25 ℃ of conditions of room temperature, rise to 375 ℃ by room temperature, temperature rise rate is 80 ℃/h, the control heating-up time is between 4 hours 10 minutes to 4 hours 35 minutes;
Keep temperature be 375 ℃ 5 hours;
Temperature is reduced to 200 ℃ by 375 ℃, and rate of temperature fall is 40 ℃/h, and the control temperature fall time is between 4 hours 10 minutes to 4 hours 35 minutes;
Temperature naturally cools to room temperature by 200 ℃;
After sintering finishes, take out goods;
E, sheet processing are contained in digital controlled lathe with bar behind the sintering and process, and the thickness of the sheet that processing obtains is between 0.6-1.2mm;
F, surface treatment, the sheet that processes is put into tetrafluoroethylene handle the line processing, put into 50 ℃ of baking oven preheating 15-30min, to protect atmospheric pressure to transfer to 0.15-0.25Mpa, in treatment trough, feed protection gas, teflon plate after the preheating is immersed in the treatment solution 3-5min takes out and put into rinse bath and clean, clean and put into 80 ℃ of dry 20-30 of baking oven minutes after finishing, take out and dry in the air to room temperature;
G, sheet are bonding, the teflon plate after the surface treatment are placed on the automatic glue spreaders gluing, plastic emitting pressure: 0.5-1.0Kg/cm
2
H, sulfuration are placed on the glue-coated teflon plate in surface in the vacuum oil sealing rubber vulcanizing machine mould keep certain hour under certain temperature and pressure, carry out moulding, pressure: 10-15Mpa, time: 3-5min, temperature: 195 ± 5 ℃;
I, arrangement are put into the oil sealing trimming machine with the sulfurized oil sealing and are repaired, check, pack, put in storage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100420910A CN100393796C (en) | 2006-01-20 | 2006-01-20 | Polytetrafluoroethylene oil seals and production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100420910A CN100393796C (en) | 2006-01-20 | 2006-01-20 | Polytetrafluoroethylene oil seals and production thereof |
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| CN1817961A CN1817961A (en) | 2006-08-16 |
| CN100393796C true CN100393796C (en) | 2008-06-11 |
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| CNB2006100420910A Active CN100393796C (en) | 2006-01-20 | 2006-01-20 | Polytetrafluoroethylene oil seals and production thereof |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5461166B2 (en) * | 2009-12-17 | 2014-04-02 | 住友重機械工業株式会社 | Gear motor for freezer |
| JP5363299B2 (en) * | 2009-12-21 | 2013-12-11 | 住友重機械工業株式会社 | Gear motor for freezer |
| CN102166800B (en) * | 2011-01-07 | 2014-08-27 | 中山富茂密封科技有限公司 | Manufacture technology of telescopic and elastic piston oil seal |
| CN104387708A (en) * | 2014-09-26 | 2015-03-04 | 苏州博利迈新材料科技有限公司 | Polytetrafluoroethylene piston ring and preparation method thereof |
| CN106832697A (en) * | 2017-03-01 | 2017-06-13 | 苏州轩朗塑料制品有限公司 | The preparation method of corrosion-resistant PTFE base hydraulic seal |
| CN106883537A (en) * | 2017-03-01 | 2017-06-23 | 苏州轩朗塑料制品有限公司 | The preparation method of the automobile-used seal of antifriction antiwear high |
| CN106916397A (en) * | 2017-03-01 | 2017-07-04 | 苏州轩朗塑料制品有限公司 | The preparation method of polytetrafluoroethylene (PTFE) and polyether-ketone composite material sealing part |
| CN106928600A (en) * | 2017-03-01 | 2017-07-07 | 苏州轩朗塑料制品有限公司 | The preparation method of the rubber-coated seal of polytetrafluoroethylene (PTFE) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1131083A (en) * | 1995-03-11 | 1996-09-18 | 张洪法 | Regenerated polytetrafluoroethylene products and producing method thereof |
| CN1464023A (en) * | 2002-06-11 | 2003-12-31 | 上海上化氟材料有限公司 | Stuffing perfluoroethylene material for oil sealing element and process for preparing the same |
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2006
- 2006-01-20 CN CNB2006100420910A patent/CN100393796C/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1131083A (en) * | 1995-03-11 | 1996-09-18 | 张洪法 | Regenerated polytetrafluoroethylene products and producing method thereof |
| CN1464023A (en) * | 2002-06-11 | 2003-12-31 | 上海上化氟材料有限公司 | Stuffing perfluoroethylene material for oil sealing element and process for preparing the same |
Non-Patent Citations (2)
| Title |
|---|
| 改性聚四氟乙烯密封材料的研究与开发. 乐启发，叶昌明等.中国塑料，第14卷第7期. 2000 |
| 改性聚四氟乙烯密封材料的研究与开发. 乐启发，叶昌明等.中国塑料，第14卷第7期. 2000 * |
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| CN1817961A (en) | 2006-08-16 |
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Address after: 265200, No. 057 West Longmen Road, Yantai, Shandong, Laiyang Patentee after: Laiyang Changyu Sealing Technology Co.,Ltd. Address before: 265200, No. 057 West Longmen Road, Yantai, Shandong, Laiyang Patentee before: SHANDONG LAIYANG CHANGYU SEALING PRODUCTS CO.,LTD. |