CN112460163A - Manufacturing process of asbestos-free clutch facing - Google Patents
Manufacturing process of asbestos-free clutch facing Download PDFInfo
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- CN112460163A CN112460163A CN202011470553.5A CN202011470553A CN112460163A CN 112460163 A CN112460163 A CN 112460163A CN 202011470553 A CN202011470553 A CN 202011470553A CN 112460163 A CN112460163 A CN 112460163A
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- glass fiber
- clutch facing
- rubber
- asbestos
- glass fibers
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 239000003365 glass fiber Substances 0.000 claims abstract description 100
- 229920001971 elastomer Polymers 0.000 claims abstract description 53
- 239000005060 rubber Substances 0.000 claims abstract description 53
- 239000010410 layer Substances 0.000 claims abstract description 25
- 230000001681 protective effect Effects 0.000 claims abstract description 10
- 239000007888 film coating Substances 0.000 claims abstract description 4
- 238000009501 film coating Methods 0.000 claims abstract description 4
- 230000008595 infiltration Effects 0.000 claims abstract description 3
- 238000001764 infiltration Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 36
- 239000000463 material Substances 0.000 claims description 25
- 239000003292 glue Substances 0.000 claims description 20
- 239000004744 fabric Substances 0.000 claims description 16
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 14
- 238000005553 drilling Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 239000007822 coupling agent Substances 0.000 claims description 4
- 239000010425 asbestos Substances 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 230000003449 preventive effect Effects 0.000 claims description 3
- 229910052895 riebeckite Inorganic materials 0.000 claims description 3
- 239000004094 surface-active agent Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000000576 coating method Methods 0.000 abstract description 4
- 230000014759 maintenance of location Effects 0.000 abstract description 3
- 239000012779 reinforcing material Substances 0.000 abstract 1
- 239000002131 composite material Substances 0.000 description 19
- 229920000049 Carbon (fiber) Polymers 0.000 description 5
- 239000004917 carbon fiber Substances 0.000 description 5
- 239000002783 friction material Substances 0.000 description 5
- 235000015110 jellies Nutrition 0.000 description 5
- 239000008274 jelly Substances 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 241000357293 Leptobrama muelleri Species 0.000 description 4
- 238000007598 dipping method Methods 0.000 description 4
- 239000012982 microporous membrane Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000010073 coating (rubber) Methods 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 238000005470 impregnation Methods 0.000 description 3
- 230000001007 puffing effect Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 229920006231 aramid fiber Polymers 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D13/00—Friction clutches
- F16D13/58—Details
- F16D13/60—Clutching elements
- F16D13/64—Clutch-plates; Clutch-lamellae
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/12—General methods of coating; Devices therefor
- C03C25/16—Dipping
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/465—Coatings containing composite materials
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0034—Materials; Production methods therefor non-metallic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/006—Materials; Production methods therefor containing fibres or particles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0078—Materials; Production methods therefor laminated
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0082—Production methods therefor
- F16D2200/0086—Moulding materials together by application of heat and pressure
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Composite Materials (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses a manufacturing process of an asbestos-free clutch facing, which comprises the steps of carrying out infiltration treatment on glass fibers to form a protective film on the surfaces of the glass fibers, carrying out perforation treatment on a glass fiber film coating layer through a microporous needling machine, and finally carrying out bulking treatment on the glass fibers. The cohesion degree between the glass fiber and the rubber is improved, and the retention rate of the strength of the glass fiber is more than 95%. The requirement of the clutch face coating process on the strength of the glass fiber is met. And no additional reinforcing material is needed, so that the production cost of the clutch facing is greatly reduced.
Description
Technical Field
The invention relates to the technical field of friction materials, in particular to a manufacturing process of an asbestos-free clutch facing.
Background
The clutch facing is an important component of the clutch, the clutch facing mainly adopts asbestos-based friction materials, and with the increasing requirements on environmental protection and safety, semimetal type friction materials, composite fiber friction materials and ceramic fiber friction materials gradually appear. The prior clutch facing production process generally comprises three processes, namely a gum dipping process, a gum pasting process and a gum coating process. The traditional rubber coating process is to prepare rubber threads from rubber, glass fiber and various auxiliary materials according to a certain proportion, then prepare the rubber threads into rubber thread blanks, finally put the rubber thread blanks into a mould, send the mould and the mould into a hot press, and press the blanks into clutch facings.
Chinese patent document (publication number: CN 108612793A) discloses a wear-resistant automobile clutch facing manufactured by an encapsulation process and a production method thereof, and the wear-resistant automobile clutch facing comprises a clutch facing body, wherein the clutch facing body comprises a clutch facing main body and steel backs, the steel backs are fixed on two sides of the clutch facing main body through rivets, the steel backs on the same surface of the clutch facing main body are connected through splicing, carbon fiber composite wires are arranged in the clutch facing main body, and the carbon fiber composite wires are connected through carbon fiber composite reinforcing wires. The glass fiber roving and the glass fiber untwisted bulked yarn have low price, but have strong heat resistance, good corrosion resistance and high mechanical strength. The use of the two yarns can reduce the cost of the carbon fiber composite wire, improve the cost performance of the carbon fiber composite wire and enable the product to have competitive advantage in the market. The shearing strength of the clutch facing body and the splicing strength between the steel backs are effectively improved, and the fault phenomenon caused by falling and cracking of the clutch facing body is effectively prevented.
The requirement of the glue line on the combined material in the existing encapsulation process is as follows: better holding degree must be kept between the glass fiber and the rubber; the glass fibers themselves must have a high tensile strength. These two points will affect the quality of the clutch facing being made. The existing glass fiber and rubber have low cohesion degree, the base material and the rubber are easy to peel after the clutch facing is made, and the service performance of the clutch facing is reduced. After the glass fiber is subjected to bulking treatment, the cohesive force between the glass fiber and rubber is greatly improved, but the strength of the glass fiber after the bulking treatment can be greatly reduced, the process requirements cannot be met, other fibers with high strength are required to be added to make up for the deficiency of the strength, such as aramid fiber and the like, but after the aramid fiber is added, the material cost of the product can be increased rapidly, and the popularization of the market is not facilitated.
Disclosure of Invention
The invention provides a manufacturing process of an asbestos-free clutch facing, which aims to solve the technical problems and can improve the cohesion degree between glass fiber and rubber and simultaneously keep the original tensile strength of the glass fiber.
The technical scheme adopted for solving the technical problems is as follows: a manufacturing process of a non-asbestos clutch facing is characterized by comprising the following steps:
step 1, performing infiltration treatment on glass fibers to form a protective film on the glass fibers, performing perforation treatment on a glass fiber film coating layer through a microporous needling machine, and performing bulking treatment on the glass fibers;
step 2, making the glass fiber into a glue line, wherein the glue line comprises an inner layer of glass fiber and a glue layer wrapped on the periphery of the glass fiber;
step 3, arranging a plurality of rubber threads on the glass fiber cloth in the mold, and adding styrene butadiene rubber and auxiliary materials into the mold;
step 4, the die is sent into a hot press and is hot-pressed into a clutch facing blank;
and 5, conveying the clutch facing blank into an oven for drying, taking out and polishing, and drilling to form the clutch facing.
The process adopts a micropore laminating method to form a protective film on the surface of the glass fiber, the surface of the protective film is provided with a plurality of micropores, and after the treated glass fiber is puffed by a puffing machine, the glass fiber in the protective film can be puffed into a spiral shape like a thread. Experiments prove that the strength retention rate can reach more than 95 percent, the requirement of the clutch face pack rubber coating process on the strength of the glass fiber is met, the glass fiber and the rubber are tightly held together, and therefore the performance of the base material is greatly improved.
Furthermore, the components of the impregnating compound for treating the glass fiber in the step 1 are as follows: 0.4-1.2% of coupling agent, 0.3-1% of surfactant, 4.5-7.5% of binder, 0.02-0.11% of mildew preventive, 0.3-0.8% of pH value regulator and 89-94% of deionized water. The coupling agent can form a strong protective film on the surface of the glass fiber, the protective film is thick, the swelling volume of the glass fiber can be limited, and the glass fiber can be swelled spirally by matching with micropores.
Furthermore, the method for preparing the glass fiber into the glue line in the step 2 comprises the following steps: rubber and auxiliary materials are added into a single-screw extruder through an automatic feeding system, glass fibers synchronously enter the single-screw extruder through a front end feeding hole, and the rubber and the auxiliary materials are uniformly wound on the surfaces of the glass fibers through the single-screw extruder. The single screw extruder can heat and pressfitting extrusion material, and its self has reinforced convenience, advantages such as temperature is steerable, can give sufficient pressure and make rubber and other auxiliary materials evenly twine the package on the glass fiber surface, can once only satisfy all demands of production rubber line, make the manufacturing cost greatly reduced of gluing the line.
Furthermore, styrene butadiene rubber is selected as the rubber. The styrene butadiene rubber has good processability and wear resistance, and the wear resistance of the clutch facing can be improved and the production cost can be reduced by using the styrene butadiene rubber as a raw material.
Furthermore, in the step 3, a plurality of layers of glue lines are arranged on the glass fiber cloth, the glue lines in one layer are arranged in parallel, and the glue lines between two adjacent layers are arranged in an intersecting manner. The rubber thread is arranged on the glass fiber cloth in a layered mode, and the formed clutch facing is high in strength and high in wear resistance. The forming method is convenient to process and requires fewer working procedures.
Compared with the prior art, the manufacturing process of the asbestos-free clutch facing uses the microporous film covering method, improves the cohesion degree between the glass fiber and the rubber, and simultaneously the retention rate of the glass fiber strength can reach more than 95%. The requirement of the clutch face coating process on the strength of the glass fiber is met, and the glass fiber and the rubber are tightly held together, so that the performance of the base material is greatly improved. In the forming process of the clutch facing, only a single-screw extruder, a winding machine and a hot press are needed, the number of the required production processes is small, the production efficiency of the clutch facing can be improved, and the required cost is greatly reduced.
Detailed Description
The prior clutch facing production process generally comprises three processes, namely a gum dipping process, a gum pasting process and a gum coating process. The process flow of the impregnation process is as follows: fully dipping the glass fiber composite base cloth or the glass fiber composite yarn by alcohol. Then the gasoline, the rubber and other auxiliary materials are put into a special rubber dipping tank for blending. And putting the glass fiber composite base fabric or the glass fiber composite yarn into an impregnation tank for secondary impregnation to obtain jelly. And (3) airing the jelly, putting the jelly into a mold, feeding the jelly and the mold into a press, and pressing the jelly into the clutch facing blank at high temperature by the press. And then putting the clutch facing blank into an oven for drying, taking the clutch facing blank out of the oven, and then performing processes such as grinding, drilling and the like to form a clutch facing finished product.
The advantages are that: the glass fiber composite base cloth/composite yarn is fully impregnated by alcohol, rubber expands under the action of gasoline, and the rubber can uniformly cover the glass fiber composite base cloth/composite yarn. After being dried, the rubber can be tightly cohered with the glass fiber composite base cloth/composite yarns, the rubber and the glass fiber composite base cloth/composite yarns are not easy to separate, and the performance of the prepared clutch facing is stable.
The disadvantages are as follows: because of using the gasoline with higher volatility, the danger coefficient is larger in the production process, and the cost is higher.
The process flow of the rubberizing process is as follows: fully soaking the glass fiber composite base cloth by alcohol and various auxiliary materials, directly attaching the solid styrene-butadiene rubber to the surface of the base cloth by a gluing machine, putting the finished product into a mould, and then sending the mould and the mould into a press. Forming a clutch facing blank under the high-temperature pressing of a press, and then putting the clutch facing blank into an oven for drying. And taking the clutch facing blank out of the oven, and grinding, drilling and the like to form a finished clutch facing product.
The advantages are that: gasoline is removed from the raw materials, the production cost is greatly reduced, and the safety factor in the production process is higher.
The disadvantages are as follows: because gasoline is not used, the styrene butadiene rubber is not fully expanded, the rubber and the base cloth are easy to separate, and the prepared clutch facing has poor quality and short service life.
The traditional encapsulation process comprises the following process flows: rubber and various auxiliary materials are put into a rubber thread forming machine according to a certain proportion, and glass fibers synchronously enter the rubber thread forming machine through a feeding hole. The rubber wire forming machine uniformly and tightly winds the rubber and other auxiliary materials on the surface of the glass fiber to form the rubber wire. And (3) putting the rubber wire into a die, and then feeding the rubber wire into a press, and pressing the rubber wire into the clutch facing blank at high temperature by the press. And then putting the clutch facing blank into an oven for drying, taking out the clutch facing blank, and then performing processes such as grinding, drilling and the like to form a clutch facing finished product.
The advantages are that: gasoline and alcohol are not used in the whole production process, the safety coefficient is greatly improved, and the method is a common production process at present.
The disadvantages are as follows: the cohesion degree between the glass fiber and the rubber in the process is poor. In order to overcome the defects, the clutch surface produced by the process has higher cost because the glass fiber is usually subjected to bulking treatment and the reinforcing fiber is added.
The invention improves the rubber coating process and designs a manufacturing process of the asbestos-free clutch facing.
The process comprises the following steps: step 1, performing soaking treatment on glass fibers to form a protective film on the surfaces of the glass fibers. Then, the glass fiber film coating layer is perforated by a micropore needle machine, so that micropores appear on the outer layer of the glass fiber. Then the glass fiber is put into a special bulking machine for bulking treatment. During expansion, the expander is used for carrying out medium-temperature and medium-pressure micro-expansion treatment on the glass fiber. As is well known, the primary use of puffing is a process of expanding a workpiece by heating, pressurizing, and then instantaneously depressurizing and cooling. The temperature and pressure will affect the puffing degree of the processed material. The glass fiber is subjected to micro-puffing treatment at medium temperature and medium pressure, so that the glass fiber can be subjected to micro-puffing. Excessive bulking of the glass fibers can result in a dramatic decrease in the strength of the glass fibers.
Under the action of the micropores, the glass fiber is spirally micro-expanded in the protective film. The expanded glass fiber is similar to an equal-pitch spring in shape, and the whole body of the expanded glass fiber is in a rope-shaped structure when seen from a far side. The shape of the glass fiber becomes thicker after treatment, so that the contact area between the glass fiber and rubber is increased, and the cohesive force between the glass fiber and the rubber is increased. Meanwhile, when the glass fiber is stretched, the glass fiber can be pulled apart like a spring; after the tension disappears, the glass fiber shrinks like a spring, so that the glass fiber has better tensile strength after being bulked.
Or the periphery of the glass fiber after the bulking treatment is wrapped with a microporous membrane, and the microporous membrane is spirally covered on the periphery of the glass fiber by a film covering machine. The microporous membrane is a microporous membrane which is formed by taking polytetrafluoroethylene as a raw material through expansion and stretching, and has small pore diameter, uniform distribution and high porosity.
And 2, adding the styrene butadiene rubber and various auxiliary materials (such as ether and viscose) into a single-screw extruder through an automatic feeding system according to a certain proportion, synchronously feeding the glass fiber into the single-screw extruder through a front end feeding hole, and uniformly and tightly winding the rubber and other auxiliary materials on the surface of the glass fiber by the extrusion principle of the single-screw extruder so as to prepare the rubber wire, wherein the structure of the rubber wire comprises the glass fiber at the inner layer and a rubber layer wrapped on the periphery of the glass fiber.
And 3, arranging a plurality of rubber wires on the glass fiber cloth in the mold, and adding the styrene-butadiene rubber and the auxiliary materials into the mold. The glue lines are uniformly distributed on two opposite sides of the glass fiber cloth, the distributed glue lines are a plurality of layers, the glue lines in one layer are arranged in parallel, the glue lines between two adjacent layers are arranged in an intersecting manner, and the glue lines between two adjacent layers are usually arranged vertically. When the mold is arranged, after the rubber thread layer is arranged, a layer of mixture of styrene butadiene rubber particles and auxiliary materials is added, the particle size of the styrene butadiene rubber particles is less than 1mm, and the amount of the added styrene butadiene rubber particles and the auxiliary materials is not obvious until the rubber thread is exposed. According to experience, the mixture of the styrene butadiene rubber and the auxiliary materials can be automatically added through a machine, and the rubber wires can also be arranged layer by layer through a wiring machine.
And 4, conveying the mold into a hot press, and thermally pressing the rubber thread blank into a clutch facing blank sheet under the treatment of the hot press.
And 5, conveying the clutch facing blank into an oven for drying, taking out and polishing, and drilling to form the clutch facing.
The components of the impregnating compound adopted for treating the glass fiber in the step 1 are as follows: 0.4-1.2% of coupling agent, 0.3-1% of surfactant, 4.5-7.5% of binder, 0.02-0.11% of mildew preventive, 0.3-0.8% of pH value regulator and 89-94% of deionized water.
Claims (5)
1. A manufacturing process of a non-asbestos clutch facing is characterized by comprising the following steps:
step 1, performing infiltration treatment on glass fibers to form a protective film on the glass fibers, performing perforation treatment on a glass fiber film coating layer through a microporous needling machine, and performing bulking treatment on the glass fibers;
step 2, making the glass fiber into a glue line, wherein the glue line comprises an inner layer of glass fiber and a glue layer wrapped on the periphery of the glass fiber;
step 3, arranging a plurality of rubber threads on the glass fiber cloth in the mold, and adding styrene butadiene rubber and auxiliary materials into the mold;
step 4, the die is sent into a hot press and is hot-pressed into a clutch facing blank;
and 5, conveying the clutch facing blank into an oven for drying, taking out and polishing, and drilling to form the clutch facing.
2. The process for manufacturing the asbestos-free clutch facing as claimed in claim, wherein the impregnating compound used for treating the glass fibers in step 1 comprises the following components: 0.4-1.2% of coupling agent, 0.3-1% of surfactant, 4.5-7.5% of binder, 0.02-0.11% of mildew preventive, 0.3-0.8% of pH value regulator and 89-94% of deionized water.
3. The manufacturing process of the asbestos-free clutch facing according to claim 1 or 2, wherein the method for manufacturing the glass fiber into the glue line in the step 2 is as follows: rubber and auxiliary materials are added into a single-screw extruder through an automatic feeding system, glass fibers synchronously enter the single-screw extruder through a front end feeding hole, and the rubber and the auxiliary materials are uniformly wound on the surfaces of the glass fibers through the single-screw extruder.
4. The process for manufacturing the asbestos-free clutch facing of claim 3, wherein the rubber is styrene-butadiene rubber.
5. The manufacturing process of the asbestos-free clutch facing according to claim 3, wherein in the step 3, a plurality of layers of glue lines are arranged on the glass fiber cloth, the glue lines in one layer are arranged in parallel, and the glue lines between the two adjacent layers are arranged in an intersecting manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011470553.5A CN112460163A (en) | 2020-12-15 | 2020-12-15 | Manufacturing process of asbestos-free clutch facing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011470553.5A CN112460163A (en) | 2020-12-15 | 2020-12-15 | Manufacturing process of asbestos-free clutch facing |
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| Publication Number | Publication Date |
|---|---|
| CN112460163A true CN112460163A (en) | 2021-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011470553.5A Pending CN112460163A (en) | 2020-12-15 | 2020-12-15 | Manufacturing process of asbestos-free clutch facing |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2825066Y (en) * | 2005-10-13 | 2006-10-11 | 中材科技股份有限公司 | Filtering material of fiberglass coated with membrane |
| CN102993635A (en) * | 2012-12-03 | 2013-03-27 | 浙江科马摩擦材料股份有限公司 | Method for preparing clutch facing through taking water soluble phenol-formaldehyde resin as adhesion agent |
| CN103921369A (en) * | 2014-04-22 | 2014-07-16 | 湖南大学 | Dry-process pre-impregnating process of thermoplastic resin based pre-impregnated tape |
| CN104888534A (en) * | 2015-05-20 | 2015-09-09 | 赵国平 | Glass fiber cloth and macromolecular polytetrafluoroethylene microporous film composite filtering material |
| CN107083619A (en) * | 2017-07-03 | 2017-08-22 | 上海国玻汽车零部件有限公司 | A kind of glass fibre formation system and technique |
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