CN100507294C - Base thrust washer of thermoplastic polymer, and preparation method - Google Patents
Base thrust washer of thermoplastic polymer, and preparation method Download PDFInfo
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- CN100507294C CN100507294C CNB2007100250420A CN200710025042A CN100507294C CN 100507294 C CN100507294 C CN 100507294C CN B2007100250420 A CNB2007100250420 A CN B2007100250420A CN 200710025042 A CN200710025042 A CN 200710025042A CN 100507294 C CN100507294 C CN 100507294C
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Abstract
This invention relates to a thermoplastic polymer thrust gasket and its preparation method including: weighing thermoplastic polymer and a solid lubricant and mixing them with a high speed mixer, then putting and sizing them in a double-screw extruder and adding reinforced fiber and whisker in it to prepare a material of high temperature resistance, high strength, anti-strike, large elasticity, low friction coefficient and low abrasion and thrust gaskets of complicated structure and different sizes can be made by injection forming at one run with the special material.
Description
Technical field
The present invention relates to a kind of thrust pushing pad circle and preparation method thereof, relate in particular to a kind of thermoplastic polymer composite material thrust washer and preparation method thereof.
Background technique
In machine driven system, between two counterrotating unsteady metal zero ones, because the part that floats, makes certain collision and the friction relatively of meeting product between two part end faces along axial the moving of running shaft.But the high-modulus of metallic material and low spreading resistance, the direct collision meeting between the rotating metallic part causes metal deformation relatively, produces bigger wearing and tearing, even the mutual interlock between the metal parts can occur, and influence the running of entire equipment.Therefore must between two metal partss, place packing ring,, transmit axial force, and play the effect that rubs of holding, reduce the wearing and tearing of transmission component, prolong service life of equipment and maintenance period in order to bear axial impact.U.S. Pat 6702711 has been mentioned a kind of use of vehicle planet cage thrust washer.Chinese patent (authorizing publication number CN 1114768C) has also been mentioned a kind of improved vehicle gear box and thrust washer thereof.U.S. Pat 6655910 has been mentioned a kind of turbo-compressor, also uses a kind of thrust washer of special construction in its pneumatic bearing system.U. S. Patent 6336868 has also been mentioned the application of thrust washer in driving universal joint.This shows that thrust washer is one of component important in the transmission system, its performance impact is to the running of whole system.Because the needs of working environment, that this type of thrust washer must will have is wear-resistant, selflubricating, shock-resistant, antifatigue and characteristics such as high temperature resistant.
But early stage thrust washer is mainly based on the metal base product.U.S. Pat 6511226 just provides a kind of preparation method of aluminium base thrust washer, and patent is mentioned by adding selflubricating, the abrasion resistance properties that auxiliary agents such as silicon, copper improve aluminium base packing ring.But because the metallic material spreading resistance is poor, the distortion that is hit is big, is easy to lose efficacy, and the metal driving component is also had certain wearing and tearing, and is not favourable to the working life and the maintenance period that prolong equipment; And the metal bump easily produces noise in the working procedure, and the vibration of equipment.And metal thrust washer molding procedure complexity, molding cycle is long, and is than great, also not favourable with energy saving to reducing cost.
U.S. Pat 6502994B2 and US20010033704A1 optimize the performance of vehicle gear box from the configuration aspects of device assembles and packing ring, mention the thrust washer of gearbox selector, but the composition and the moulding process of gasket materials are not all mentioned with the polyimide resin matrix of excellent performance.The international market has polyimide-based thrust washer to sell, and is Dupont VESPEL product, is a kind of thermoset polyimide resin product, its moulding process complex procedures.U.S. Pat 5967674, US5918987, US5683184 and US5374171 mention rotary component thrust surface interpolation thrust washers such as thrust bearing, and optimize from the gasket construction aspect, to reduce the wearing and tearing of component, the optimizing equipment usability, the thrust washer of mentioning in the patent also is to be body material with plastics, but kind, composition and the preparation process of plastics all do not mentioned.U.S. Pat 6264566, US5813916 and international monopoly WO96/35059 place thrust washer between driving universal joint bearing cup and needle bearing, can reduce the scratch and the wearing and tearing of metal parts.The thrust washer of mentioning in the patent with nylon as body material.But because the working environment of thrust washer needs it to have performances such as high temperature resistant, high strength, wear-resistant, selflubricating, with regard to the temperature resistant grade and the intensity of nylon, it can only suit to be applied to the lower occasion of working condition requirement.And also the composition and the preparation process of foot couple nylon based thrust washer material explain in the patent.
Summary of the invention
The objective of the invention is for overcome existing thrust washer molding procedure complexity, efficient is low, cost of production is high, in the using process problem such as big, easily deformable inefficacy of noise and use occasion condition harshness and propose a kind of be the thrust washer of matrix with the exsertile thermoplastic polymer of processability; Another object of the present invention provides the preparation method of above-mentioned material.
Technological scheme of the present invention is:
A kind of base thrust washer of thermoplastic polymer, it is as follows to it is characterized in that its material component of this thrust washer and each component account for the weight percentage of raw material total amount:
Thermoplastic polymer: 60%～90%
Reinforcing fiber or whisker: 0%～20%
Solid lubricant: 5%～20%
Described thermoplastic polymer is a kind of or both mixtures in acid imide, the ether ketone thermoplastic polymer.Wherein acid imide preferred thermoplastic polyimide, polyamide-imides (Torlon), ether ketone preferred, polyethers ketone (Kadel), polyether-ether-ketone (Victrex), PEKK (PEKK), polyetherketoneetherketoneketone (Ultrapek).
Described reinforcing fiber is a kind of or both mixtures of carbon fiber (Formosa Plastics's production) or glass fibre (Nanjing Glass Fibre Research and Design Institute provides).
Described enhancing whisker is a kind of in potassium titanate crystal whisker (the compound composite material of Shanghai whisker factory provides) or the silicon carbide whisker (the grand military nanometer material in Xuzhou Co., Ltd provides).
Described solid lubricant is to be at least a kind of in teflon, graphite, the molybdenum disulfide.
A kind of base thrust washer of thermoplastic polymer is characterized in that this gasket materials adopts double screw extruder to extrude the method preparation of blend, and its manufacturing process is as follows:
Take by weighing thermoplastic polymer that accounts for raw material gross weight 60～90% and the solid lubricant that accounts for raw material gross weight 5～20%, mix the back through high-speed mixer and add double screw extruder blend granulation, be metered into 0～20% reinforcing fiber of raw material gross weight in this process by the method for adding continuous fiber, or be metered into 0～20% enhancing whisker of raw material gross weight by the side feeding machine, promptly obtain thrust washer material particle thus.
Expressing technique is as follows: temperature: 340～400 ℃; Engine speed: 200～300rpm; Feeding frequency: 8～15Hz.
A kind of base thrust washer of thermoplastic polymer is characterized in that this gasket materials can adopt injection molding method once-through complex structure, the different thrust washer of size, and its process parameter is as follows:
Injecting forming temperature: 340～400 ℃; Injection pressure: 90～150MPa; Injection speed: 2～3s; Die temperature: 120～200 ℃; Cool time: 8～20s.
Beneficial effect:
It is matrix that the present invention selects the exsertile thermoplastic polymer of processability for use, but has the performance of thermoplastic processing, has simplified production technology, has improved manufacturing efficiency.That the thermoplastic polymer that the present invention selects for use has is high temperature resistant, the excellent properties of high strength, antifatigue.Compare with metal washer, this type of plastic washer elastic strain is big, and is not yielding, and has the selflubricating characteristics, can reduce vibration, reduce noise, prolongs service life of equipment and maintenance period.
That the method preparation that blend is extruded in employing has is high temperature resistant, the power packing ring composite material PP Pipe Compound of high strength, shock-resistant, elastic strain big (not yielding), low coefficient of friction, low wear extent; This composite material PP Pipe Compound can adopt injection molding method once-through complex structure, the different thrust washer of size.
Material typical case performance is as follows:
Embodiment
Embodiment 1: with the thermoplastic polyimide (GCPI of quality percentage composition 70%
TM, Aurum), 10% teflon, after 5% molybdenum disulfide mixes by high-speed mixer, add double screw extruder blend granulation, in this process, be metered into the glass fibre (Nanjing Glass Fibre Research and Design Institute provides) of quality percentage composition 15%, extrude and make material and promptly get packing ring material particle, particle through injection moulding get final product packing ring.Concrete process parameter and material property are referring to subordinate list.
Embodiment 2: with the polyether-ether-ketone (Victrex) of quality percentage composition 75%, 6% teflon, after 4% graphite mixes by high-speed mixer, add double screw extruder blend granulation, in this process, be metered into the carbon fiber (Formosa Plastics's production) of quality percentage composition 15%, extrude and make material and promptly get packing ring material particle, particle through injection moulding get final product packing ring.Concrete process parameter and material property are referring to subordinate list.
Embodiment 3: with the thermoplastic polyimide (Aurum) of quality percentage composition 30%, 30% polyether-ketone (Kadel), 10% teflon, after 5% graphite and 5% molybdenum disulfide mix by high-speed mixer, add double screw extruder blend granulation, in this process, be metered into the carbon fiber (Formosa Plastics's production) of quality percentage composition 10% and 10% glass fibre (Nanjing Glass Fibre Research and Design Institute provides), extrude and make material and promptly get packing ring material particle, particle through injection moulding get final product packing ring.Concrete process parameter and material property are referring to subordinate list.
Embodiment 4: with the thermoplastic polyimide (GCPI of quality percentage composition 90%
TM, Aurum), after 3% teflon, 7% graphite mix by high-speed mixer, add double screw extruder blend granulation, promptly get packing ring material particle, particle pass through injection moulding get final product packing ring.Concrete process parameter and material property are referring to subordinate list.
Embodiment 5: with the polyamide-imides (Torlon) of quality percentage composition 80%, 5% teflon, after 5% graphite mixes by high-speed mixer, add double screw extruder blend granulation, in this process, be metered into the carbon fiber (Formosa Plastics's production) of quality percentage composition 10%, extrude and make material and promptly get packing ring material particle, particle through injection moulding get final product packing ring.Concrete process parameter and material property are referring to subordinate list.
Embodiment 6: with the thermoplastic polyimide (GCPI of quality percentage composition 65%
TM, Aurum), 5% teflon, after 15% graphite mixes by high-speed mixer, add double screw extruder blend granulation, in this process, be metered into the potassium titanate crystal whisker (the compound composite material of Shanghai whisker factory provides) of quality percentage composition 15%, extrude and make material and promptly get packing ring material particle, particle through injection moulding get final product packing ring.Concrete process parameter and material property are referring to subordinate list.
Embodiment 7: with the polyetherketoneetherketoneketone (Ultrapek) of quality percentage composition 70%, 10% teflon, after 10% molybdenum disulfide mixes by high-speed mixer, add double screw extruder blend granulation, in this process, be metered into the silicon carbide whisker (the grand military nanometer material in Xuzhou Co., Ltd provides) of quality percentage composition 10%, extrude and make material and promptly get packing ring material particle, particle through injection moulding get final product packing ring.Concrete process parameter and material property are referring to subordinate list.
Embodiment 8: with the thermoplastic polyimide (GCPI of quality percentage composition 40%
TM, Aurum), 20% polyether-ether-ketone (Victrex), 10% teflon, after 5% graphite and 5% molybdenum disulfide mix by high-speed mixer, add double screw extruder blend granulation, in this process, be metered into the potassium titanate crystal whisker (the compound composite material of Shanghai whisker factory provides) of quality percentage composition 20%, extrude and make material and promptly get packing ring material particle, particle through injection moulding get final product packing ring.Concrete process parameter and material property are referring to subordinate list.
Embodiment 9: with the thermoplastic polyimide (GCPI of quality percentage composition 90%
TM, Aurum), after 5% teflon mixes by high-speed mixer, add double screw extruder blend granulation, in this process, be metered into the silicon carbide whisker (the grand military nanometer material in Xuzhou Co., Ltd provides) of quality percentage composition 5%, extrude and make material and promptly get packing ring material particle, particle injection moulding get final product packing ring.Concrete process parameter and material property are referring to subordinate list.
Embodiment 10: with the PEKK (PEKK) of quality percentage composition 60%, 15% teflon, after 5% molybdenum disulfide mixes by high-speed mixer, add double screw extruder blend granulation, in this process, be metered into the potassium titanate crystal whisker silicon (the compound composite material of Shanghai whisker factory provides) of quality percentage composition 20%, extrude and make material and promptly get packing ring material particle, particle through injection moulding get final product packing ring.Concrete process parameter and material property are referring to subordinate list.
Subordinate list:
Claims (6)
1, a kind of base thrust washer of thermoplastic polymer, it is as follows to it is characterized in that its material component of this thrust washer and each component account for the weight percentage of raw material total amount:
Thermoplastic polymer 60%～90%
Strengthen whisker 0%～20%
Solid lubricant 5%～20%
Above-mentioned thermoplastic polymer is a kind of or both mixtures in acid imide or the ether ketone thermoplastic polymer, and wherein acid imide is a polyamide-imides; Described enhancing whisker is a kind of in potassium titanate crystal whisker or the silicon carbide whisker.
2, thrust washer according to claim 1 is characterized in that described ether ketone is polyether-ketone, polyether-ether-ketone, PEKK or polyetherketoneetherketoneketone.
3, thrust washer according to claim 1 is characterized in that described solid lubricant is at least any one in teflon, graphite, the molybdenum disulfide.
4, a kind of method for preparing base thrust washer of thermoplastic polymer as claimed in claim 1, its concrete steps are as follows:
A. take by weighing thermoplastic polymer that accounts for raw material gross weight 60～90% and the solid lubricant that accounts for raw material gross weight 5～20%, mix the back through high-speed mixer and add double screw extruder blend granulation, be metered into 0～20% enhancing whisker of raw material gross weight by the side feeding machine, promptly obtain thrust washer material particle thus;
B. adopt injection molding method once-through to make thrust washer with the material particle above-mentioned prepared thrust washer.
5, preparation method according to claim 4 is characterized in that the expressing technique parameter is in the steps A: 340～400 ℃ of temperature; Engine speed 200～300rpm; Feeding frequency 8～15Hz.
6, preparation method according to claim 4 is characterized in that the injection moulding parameter is among the step B: 340～400 ℃ of temperature; Injection pressure 90～150MPa; Injection speed 2～3s; 120～200 ℃ of die temperatures; Cool time 8～20s.
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| CNB2007100250420A CN100507294C (en) | 2007-07-09 | 2007-07-09 | Base thrust washer of thermoplastic polymer, and preparation method |
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| CNB2007100250420A CN100507294C (en) | 2007-07-09 | 2007-07-09 | Base thrust washer of thermoplastic polymer, and preparation method |
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