CN103342985A - Friction material without asbestos layer and manufacturing method - Google Patents
Friction material without asbestos layer and manufacturing method Download PDFInfo
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- CN103342985A CN103342985A CN2013102225039A CN201310222503A CN103342985A CN 103342985 A CN103342985 A CN 103342985A CN 2013102225039 A CN2013102225039 A CN 2013102225039A CN 201310222503 A CN201310222503 A CN 201310222503A CN 103342985 A CN103342985 A CN 103342985A
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Abstract
The invention relates to a friction material without an asbestos layer and a manufacturing method thereof. The friction material without the asbestos layer consists of an adhesive, reinforcing fibers and a friction performance regulating agent. The reinforcing fibers comprise glass fibers, aramid fibers, copper wires and friction spinning yarns. The manufacturing method of the friction material without the asbestos layer comprises the steps: acquiring the friction spinning yarns; twisting together for two times to obtain twisted threads; weaving the twisted threads to form a piece of mesh cloth; dipping the mesh cloth with the adhesive, and baking; clipping; carrying out press vulcanization after overlapping; and grinding the surface to obtain the finished product. The production cost of the friction material without the asbestos layer is low, the base material has better overall associativity, the metal wire distribution is more uniform, and the heat conductivity and the heat dissipation of the friction material are faster and better. The precision of the manufactured friction element size is higher than that of a friction element manufactured by a conventional method. Phenomena of blistering, swelling, stratifying and warping that often appear during the production of laminated products are completely avoided. The manufactured finished product has higher curing degree and more stable friction coefficient.
Description
Technical field
What the present invention relates to is the widely used stopper of industry such as mine, oil recovery, boats and ships, automobile, metallurgy, papermaking and clutch coupling with friction materials and manufacturing technologies thereof, especially for friction materials and the manufacturing technology thereof of stopper and the clutch coupling of high-power braking moment.
Background technology
Friction materials be for many movable machineries and equip transmission, braking, slowed down, turned to, functional accessory that Parking etc. acts on, we can say from mechanical movement is arranged, the human requirement that drag has just been arranged, wooden unit, ox-hide, rubber etc. all once were used as brake material.Asbestos friction material is used by the mankind as traditional product always in a large number before the 1970s and 1980s in last century, after this, because known widely asbestos can cause pulmonary lesion and mesothelioma and relevant with the generation of lung cancer.International tumour medical science discussion in 1972 confirms that fibrous magnesium silicate contains carcinogenic substance, and after this, the no asbestosization of friction goods and pollution-freeization become the common recognition of worldwide development gradually.In No. 13 rules of UNECE (ECE) and the international standard council (ISO) related standards, expressly provide and forbid producing and selling and using asbestos product.The 1974SOLAS of International Maritime Organizaton pact 2000 amendments stipulate that clearly " for all boats and ships, the novelty that contains asbestos material is installed and should be forbidden, unless particular requirement is arranged." State Bureau of Technical Supervision stipulates " from October 1st, 2003, brake lining should not contain asbestos " in mandatory standard GB 12676-1999.
In existing asbestos-free friction material technology, equivalent material as the fibrous magnesium silicate strongthener is a lot, steel fiber, carbon fiber, glass fibre, ceramic fiber and aramid fiber all are the comparatively desirable strongtheners of making in the starting material of friction elements such as all kinds of stoppers, clutch facing, and its characteristic and price and proportioning are each other determining performance and the application prospect of friction element to a great extent.Friction materials mainly is made up of three parts: 1, tackiness agent; 2, fortifying fibre; 3, frictional property regulator.The selection of various prescriptions and composition material be must carry out according to the re-set target that will reach, and suitable manufacture method and production technique selected.
Summary of the invention
It is bad that existing in order to overcome " press type friction materials " carries out the mechanical workout aftershaping, particularly carry out mechanical gear shaping after tooth portion intensity relatively poor, can not satisfy the shortcoming of customer requirements; Technical problem to be solved by this invention is, a kind of high strength is provided, easily processing, and frictional behaviour is good, and long service life is pollution-free, high-quality no asbestos lamination friction materials and manufacture method.
The invention provides a kind of no asbestos lamination friction materials of being formed by tackiness agent, fortifying fibre and frictional property regulator.Wherein, tackiness agent is liquid phenolic resin or modified liquid resol, and fortifying fibre is glass fibre, aramid fiber, copper wire and friction spun yarn, and friction spun yarn is formed by viscose fiber, glass fibre and acrylic fiber blending.
The use of glass fibre is that wear resisting property is also good, low price because it has good heat-resistant and mechanical property.Aramid fiber (for example, E.I.Du Pont Company's commodity are by name: Kevlar) light weight, specific surface area is big, intensity is high, high temperature resistant, wear-resistant, fluffy, good with the consistency of resin, but price is more expensive.Copper wire has good thermal conductivity, produce the brake failure that localized hyperthermia causes in the time of can avoiding the friction materials braking, add that it can play the effect of the carburization zone that cleaning brake surface generates more firmly with respect to the other materials material, thereby strengthen the restorability of friction materials.The use of friction spun yarn is for the wetting property that improves resol and resin content, strengthens its adhesiveproperties.
The weight percent of no each composition of asbestos lamination friction materials provided by the invention is:
Wherein friction spun yarn is formed by weight blending in 1: 1: 1 by viscose fiber, glass fibre and acrylic fiber.
The present invention simultaneously also provides the manufacture method of described no asbestos lamination friction materials, may further comprise the steps:
1) viscose fiber, glass fibre and acrylic fiber are obtained the friction spinning by weight blending in 1: 1: 1;
2) glass fibre, aramid fiber, copper wire and friction spun yarn are pooled capital with certain proportion, to twist with the fingers good line, wherein can be as required or cost select the copper wire of different diameter for use, select 0.1～1mm usually, preferred 0.2mm;
3) will twist with the fingers then that braiding machine is woven into grid cloth on the good line;
4) grid cloth is put in the immersion trough of filled with fluid resol or modified liquid resol and fully flooded, pull drip-dry out, enter baking oven baking back and take out;
5) cut out according to the size of the friction element of wanting to obtain then;
6) be the thickness that the thickness gauge of 1mm is calculated required friction element according to each layer cloth, put into flat-bed press after folding and carry out press vulcanization;
7) cooling is polished to the surface after taking out, and makes finished product.
Can save a large amount of die costs with flooding the mode of production of carrying out hot pressing after grid cloth is folded by the number of plies among the present invention, also be beneficial to very much the discharge of the gas that produces in the sulfidation, thereby can effectively avoid causing the generation of goods foaming, swelling, layering and warping phenomenon.
Goods of the present invention can carry out the processing of the friction element of various different sizes and size according to user's different demands, both can satisfy the diversified demand of user, can also satisfy the demand that its short run is ordered goods.Save a large amount of die cost, shorten the product delivery cycle.
Compare with the friction enhancing material of existing non-woven fabrics or Bao Xin spinning, each body material of the present invention is by the secondary direct combination of twisting thread, need not surrounding layer, reduced production cost, the body material integral coherence is better, directly fit with dual face, simultaneously the metal copper wire distributes more evenly, and friction materials heat conduction, heat radiation are faster, more excellent.Existing core yarn technology is to constitute the glass fibre of friction material matrix and steel fiber as core material, by one or more layers outer wrapping fiber layer of looping outside it its core body material is tightly restrainted, because the existence of surrounding layer is arranged, the stickiness of friction body material and friction pair face is poor, in actual use, at first need the friction by certain hour, destroy surrounding layer, the body material that is wrapped by is wherein played a role, the present invention adopts glass fibre, aramid fiber, and the metal copper wire is as body material, need not to use surrounding layer, to directly twist with the fingers into strand with aramid fiber through the glass fibre of expanded mistake by a first twist, again first twist gained strand is become line with the metal copper wire by the secondary retwist, the body material integral coherence is better, it is more even, in actual use, also better with the direct stickiness of dual face to distribute simultaneously.Simultaneously because wire directly becomes line with the common blending of other filamentary materials, make copper wire regularity of distribution and more even in integral material, thereby the heat conduction and heat radiation of gained friction materials of the present invention also the gained material that rubs is more excellent than existing methods.
The present invention is by the twist thread blending friction strand of gained of secondary, last braiding machine is woven into grid cloth, and warp density, weft density can be by the adjusting number of share of stock controls that spins, thereby, precision is higher than existing methods for made friction element size, but the thickness precision of every layer of cloth is to 1mm.
The later grid cloth of steeping liq resin of the present invention at first through once baking, is folded the back hot-press vulcanization with it by the number of plies again.This production method is beneficial to the discharge of the gas that produces in the sulfidation very much; In the production of this laminate product, particularly the more big product of size tend to occur to bubble, the generation of swelling, layering and warping phenomenon, these all can not effectively discharge great relation with the gas that produces in the hot pressing.This method can thoroughly solve this difficult problem.The state of cure of gained finished product is higher, and frictional coefficient is more stable.
Description of drawings
Fig. 1 is no asbestos lamination friction materials cross-sectional view of the present invention.
Embodiment
Selecting liquid phenolic resin (or modified phenolic resins) for use is caking agent.Can use or inapplicable frictional property regulator.Strongthener is: glass fibre, aramid fiber, copper wire and friction spun yarn.Friction spun yarn is formed by blending in 1: 1: 1 by viscose fiber, glass fibre and acrylic fiber.Its prescription is as follows:
Manufacture method is as follows:
Glass fibre, aramid fiber, 0.2mm copper wire and friction spun yarn are pooled capital according to the above ratio, and the plying twist is 9～10/10CM.
To twist with the fingers then that braiding machine is woven into the wide grid cloth of 900mm, warp density 38/CM, weft density 30/CM on the good line.
Grid cloth is put in the immersion trough of filled with fluid resol and fully flooded, pull drip-dry out, enter 100 ℃ of bakings of baking oven and take out after 1 hour.
Cut out according to the size of the friction element of wanting to obtain then, be the thickness that the thickness gauge of 1mm is calculated required friction element according to each layer cloth, put into flat-bed press after folding and carry out press vulcanization, curing temperature is 150 ℃～200 ℃, pressure is 15～30Mpa, and curing time is 30～120 minutes.
Cooling is taken out the back and is polished in the surface, enters 120 ℃～180 ℃ bakings of baking oven again, and the time is 120～240 minutes, and goods reach optimal performance.
Goods are carried out outward appearance and frictional behaviour check, qualified product packing warehouse-in.
Goods of the present invention not only have good tribological property, but also have good various mechanics and mechanical property, are embodied in:
Above specific embodiment is the description to aim of the present invention, and can not be interpreted as limitation of the scope of the invention.
Claims (10)
1. there is not asbestos lamination friction materials, formed by tackiness agent, fortifying fibre and frictional property regulator, wherein, described tackiness agent is liquid phenolic resin or modified liquid resol, described fortifying fibre is glass fibre, aramid fiber, copper wire and friction spun yarn, and described friction spun yarn is formed by viscose fiber, glass fibre and acrylic fiber blending.
2. no asbestos lamination friction materials as claimed in claim 1 is characterized in that the weight percent of each composition is:
3. no asbestos lamination friction materials as claimed in claim 2 is characterized in that friction spun yarn is formed by weight blending in 1: 1: 1 by viscose fiber, glass fibre and acrylic fiber.
4. as the manufacture method of the arbitrary described no asbestos lamination friction materials of claim 1-3, may further comprise the steps:
1) viscose fiber, glass fibre and acrylic fiber are obtained the friction spinning by weight blending in 1: 1: 1;
2) glass fibre, aramid fiber, copper wire and friction spun yarn are pooled capital with certain proportion, obtain to twist with the fingers good line;
3) will twist with the fingers then that braiding machine is woven into grid cloth on the good line;
4) grid cloth is put in the immersion trough of filled with fluid resol or modified liquid resol and fully flooded, pull drip-dry out, enter baking oven baking back and take out;
5) cut out according to the size of the friction element of wanting to obtain then;
6) be the thickness that the thickness gauge of 1mm is calculated required friction element according to each layer cloth, put into flat-bed press after folding and carry out press vulcanization;
7) cooling is polished to the surface after taking out, and makes finished product.
5. the manufacture method of no asbestos lamination friction materials as claimed in claim 4 is characterized in that, described step 2) in the plying twist be 9～10/10CM.
6. the manufacture method of no asbestos lamination friction materials as claimed in claim 4 is characterized in that, the wide 900mm of grid cloth in the described step 3), warp density 38/CM, weft density 30/CM.
7. the manufacture method of no asbestos lamination friction materials as claimed in claim 4 is characterized in that, oven temperature is 100 ℃ of storing times 1 hour in the described step 4).
8. the manufacture method of no asbestos lamination friction materials as claimed in claim 4 is characterized in that, curing temperature is 150 ℃～200 ℃ in the described step 6), and pressure is 15～30Mpa, and curing time is 30～120 minutes.
9. the manufacture method of no asbestos lamination friction materials as claimed in claim 4 is characterized in that, in the described step 7), the finished product after the polishing enters 120 ℃～180 ℃ bakings of baking oven again, and the time is 120～240 minutes.
10. the manufacture method of no asbestos lamination friction materials as claimed in claim 4 is characterized in that, also comprises the step of quality test and packing warehouse-in after step 7).
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| CN201310222503.9A CN103342985B (en) | 2013-06-06 | 2013-06-06 | Friction material without asbestos layer and manufacturing method |
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| CN201310222503.9A CN103342985B (en) | 2013-06-06 | 2013-06-06 | Friction material without asbestos layer and manufacturing method |
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| CN103342985A true CN103342985A (en) | 2013-10-09 |
| CN103342985B CN103342985B (en) | 2015-01-14 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104277764A (en) * | 2014-08-13 | 2015-01-14 | 贵阳天龙摩擦材料有限公司 | Industrial metal-free asbestos-free friction material and manufacturing method thereof |
| CN108138860A (en) * | 2016-02-16 | 2018-06-08 | 吉凯恩传动系统日本株式会社 | Multiplate clutch |
| CN112226206A (en) * | 2020-11-09 | 2021-01-15 | 贵阳天龙摩擦材料有限公司 | Preparation method of integrally woven friction material |
| CN112321266A (en) * | 2020-11-11 | 2021-02-05 | 广西中久电力科技有限责任公司 | Sound-absorbing material for noise reduction of centrifugal machine and preparation method thereof |
| CN112384713A (en) * | 2018-05-18 | 2021-02-19 | 洛科威国际有限公司 | Friction material |
| CN113025272A (en) * | 2021-03-30 | 2021-06-25 | 贵阳天龙摩擦材料有限公司 | Friction material and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104277764A (en) * | 2014-08-13 | 2015-01-14 | 贵阳天龙摩擦材料有限公司 | Industrial metal-free asbestos-free friction material and manufacturing method thereof |
| CN108138860A (en) * | 2016-02-16 | 2018-06-08 | 吉凯恩传动系统日本株式会社 | Multiplate clutch |
| CN108138860B (en) * | 2016-02-16 | 2020-08-14 | 吉凯恩传动系统日本株式会社 | Multi-plate clutch |
| CN112384713A (en) * | 2018-05-18 | 2021-02-19 | 洛科威国际有限公司 | Friction material |
| CN112226206A (en) * | 2020-11-09 | 2021-01-15 | 贵阳天龙摩擦材料有限公司 | Preparation method of integrally woven friction material |
| CN112321266A (en) * | 2020-11-11 | 2021-02-05 | 广西中久电力科技有限责任公司 | Sound-absorbing material for noise reduction of centrifugal machine and preparation method thereof |
| CN113025272A (en) * | 2021-03-30 | 2021-06-25 | 贵阳天龙摩擦材料有限公司 | Friction material and preparation method thereof |
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