CN109562575B - Method for producing friction lining - Google Patents
Method for producing friction lining Download PDFInfo
- Publication number
- CN109562575B CN109562575B CN201780047420.7A CN201780047420A CN109562575B CN 109562575 B CN109562575 B CN 109562575B CN 201780047420 A CN201780047420 A CN 201780047420A CN 109562575 B CN109562575 B CN 109562575B
- Authority
- CN
- China
- Prior art keywords
- preform
- cross
- equal
- oversized
- oversize
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000002783 friction material Substances 0.000 claims abstract description 48
- 239000002131 composite material Substances 0.000 claims abstract description 44
- 238000012545 processing Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 15
- 229920001187 thermosetting polymer Polymers 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 11
- 239000011347 resin Substances 0.000 claims description 11
- 239000000428 dust Substances 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 239000005060 rubber Substances 0.000 claims description 6
- 229920000642 polymer Polymers 0.000 claims description 4
- 229920013730 reactive polymer Polymers 0.000 claims description 4
- JMHCCAYJTTWMCX-QWPJCUCISA-M sodium;(2s)-2-amino-3-[4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]propanoate;pentahydrate Chemical compound O.O.O.O.O.[Na+].IC1=CC(C[C@H](N)C([O-])=O)=CC(I)=C1OC1=CC(I)=C(O)C(I)=C1 JMHCCAYJTTWMCX-QWPJCUCISA-M 0.000 claims description 4
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical group [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 3
- 239000010786 composite waste Substances 0.000 claims description 3
- 229920001568 phenolic resin Polymers 0.000 claims description 3
- 239000005011 phenolic resin Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 238000001723 curing Methods 0.000 description 14
- 239000000835 fiber Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 239000000945 filler Substances 0.000 description 6
- 238000003754 machining Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000080 wetting agent Substances 0.000 description 3
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- 239000005062 Polybutadiene Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- 229920002857 polybutadiene Polymers 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- -1 i.e. Polymers 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000013528 metallic particle Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
- B29C70/545—Perforating, cutting or machining during or after moulding
-
- 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
- F16D69/025—Compositions based on an organic binder
- F16D69/026—Compositions based on an organic binder containing fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/16—Frictional elements, e.g. brake or clutch linings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Braking Arrangements (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
A method of manufacturing a friction lining comprising: a) a step of providing a preform during which a preform made of friction material in a non-cross-linked state is provided comprising two opposite faces, b) an additional thickness step during which an additional thickness of composite material is provided on one of the two opposite faces of the preform made of friction material in a non-cross-linked state, c) a curing step during which a cross-linked assembly is obtained comprising a preform made of friction material in a cross-linked state and an additional thickness in a cross-linked state, d) a processing step during which at least one face of the cross-linked assembly is processed so as to remove the additional thickness in a cross-linked state and obtain a friction lining in a cross-linked state having two parallel opposite faces.
Description
Technical Field
The present invention relates to a method for manufacturing a friction lining, in particular for a brake disc or a clutch of a motor vehicle, and also to a friction lining obtained by this method.
Background
During the preparation of friction linings for brake discs or clutches for motor vehicles, solid materials are compressed under temperature and pressure to form cured parts. The thickness variation of the cured part after moulding is between 0.1mm and 0.3mm due to creep of the resin, aspect ratio of the materials present (such as fibres and powder) and the design of the mould.
Thus, in order to obtain the parallel surfaces required by the clutch or brake system, machining operations are performed on one and/or both surfaces of the material. The machining operation results in a material loss of 10% to 25% by weight, which relates to the manufacture of friction linings for clutches or brake pads of motor vehicles. In the case of complex and expensive materials to process, such friction loss materials also represent an economic loss.
Disclosure of Invention
It is an object of the present invention to provide a method which reduces the loss of friction material during manufacture.
The invention therefore provides a method for manufacturing a friction lining, in particular for a brake disc or a clutch for a motor vehicle, comprising:
a stage of providing a preform during which a preform made of friction material in a non-crosslinked state is provided comprising two opposite faces,
an oversize (oversize) phase during which an oversize made of a composite material comprising a mixture of fibres of variable length and cross-section and a thermosetting resin in the non-crosslinked state is provided on one of the two opposite faces of a preform made of friction material in the non-crosslinked state,
a curing phase during which a preform comprising a friction material in a non-crosslinked state and an oversized assembly is heated at a pressure greater than or equal to 50 bar and less than or equal to 300 bar and a temperature greater than or equal to 180 ℃ and less than or equal to 210 ℃ for a period of time greater than or equal to 1 minute and less than or equal to 15 minutes, so as to obtain a crosslinked assembly comprising a preform comprising a friction material in a crosslinked state and an oversized assembly in a crosslinked state,
-a processing phase during which at least one face of the cross-linked assembly is processed so as to remove the oversize in cross-linked state and obtain a friction lining in cross-linked state with the opposite faces parallel to each other.
Advantageously, providing an oversize made of composite material makes it possible to reduce the loss of friction material during the manufacturing process.
The method according to the invention may also comprise one or more of the following features, considered alone or according to all technically possible combinations:
-removing 10% to 30% of the thickness of the cross-linked component at the processing stage; and/or
-the material removed at the processing stage comprises at least 80% by weight of the oversized composite material in a cross-linked state; and/or
-the oversized composite material comprises a mixture of fibres having a size greater than or equal to 50 μ ι η and less than or equal to 300 μ ι η; and/or
-the oversized composite material comprises a mixture of particles having a diameter of less than 50 μm; and/or
-the oversized composite comprises at least 25% by weight and at most 45% by weight of fibres and/or powders of inorganic nature; and/or
-the oversized composite comprises at least 20% and at most 35% by weight of inert fillers of organic nature; and/or
The oversized composite comprises at least one wetting agent, in particular water, a tackifier or PVA, i.e. polyvinyl acetate; and/or
-the oversized composite comprises at least one reactive polymer, in particular a phenolic resin, a melamine/formaldehyde resin and/or a rubber; and/or
-the oversized composite comprises at least 30% and at most 50% by weight of the living polymer; and/or
The oversized composite material is at least partially produced from thermosetting composite waste, in particular dust from the processing of friction linings or the grinding thereof; and/or
-the oversized composite material comprises at most 10% by weight of metal particles, preferably at most 5% by weight; and/or
-preforming an oversize, in particular by compression under low pressure, before being placed on one face of a preform of friction material; and/or
-the preform of friction material is positioned on the surface of the support disc before being fixed by adhesive bonding during the curing phase; and/or
-during the oversize phase, oversize is provided on two opposite faces of the preform of friction material.
Finally, the invention relates to a friction lining, in particular for a brake disc or a clutch for a motor vehicle, for example obtained by the method according to the invention.
The friction lining may comprise one or more of the following features, considered alone or according to all technically possible combinations:
the lining comprises a decreasing concentration gradient of fibers of variable length, section and chemical nature, starting from one of the two opposite faces of the friction lining; and/or
The lining comprises a first zone comprising fibres of variable length, section and chemical nature and a second zone without fibres of variable length, section and chemical nature, the first zone extending from one of the two opposite faces of the friction lining and having a thickness less than or equal to 15% of the total thickness of the friction lining, the second zone having a thickness greater than or equal to 70% of the total thickness of the friction lining. The first region may also include composite residue, the composition of which is described above in connection with the oversize, and the second region may be free of composite residue.
Drawings
A better understanding of the present invention will be obtained from the following description which is given by way of indication only, without limiting the purpose of the invention, and with the accompanying drawings in which:
figure 1 shows the different stages of the method according to the invention,
FIG. 2 shows a preform made of a friction material in a non-crosslinked state,
FIG. 3 shows a preform made of the friction material in the non-crosslinked state, and an oversize made of the composite material in the non-crosslinked state,
FIG. 4 shows a cross-linking assembly comprising a preform made of a friction material in a cross-linked state and an oversize in a cross-linked state,
figure 5 shows the same cross-linked component and processing area,
FIG. 6 shows a preform made of friction material in the non-crosslinked state and a support disc,
figure 7 shows a friction lining obtained by the method according to the invention.
Detailed Description
The invention relates to a method for producing a friction lining, in particular for a brake disc or a clutch for a motor vehicle, comprising at least:
a stage S1 of providing a preform,
an oversize phase S2,
a curing phase S3 of the curing phase,
a processing stage S4.
The different stages of the method according to the invention are shown in fig. 1.
Friction linings are elements that rub against another body, having physical and mechanical properties that make them able to withstand high mechanical and thermal stresses. The composition, shape and size of the friction lining are decisive.
As shown in fig. 2, during a stage S1 of providing a preform, a preform 2 made of a friction material in a non-crosslinked state is provided. The preform, made of friction material in a non-crosslinked state, has two opposite faces 2a and 2b. The preform may be annular. The friction material for the friction lining may for example comprise fibres and/or thermosetting resin and/or rubber and/or wires and/or fillers.
The fibers may be arranged as a plurality of strands, that is, a group of individual filaments oriented on the same axis, continuous or cut into uniform lengths, for example greater than or equal to 2mm and less than 6mm for cutting the strands.
The thermosetting resin may be, for example, a melamine/formaldehyde resin and/or a phenol/formaldehyde resin.
The rubber may be, for example, SBR, i.e., styrene/butadiene rubber, and/or NBR, i.e., nitrile/butadiene rubber.
The wires may have a uniform cross-section, for example greater than or equal to 100 μm and less than or equal to 300 μm.
The filler may, for example, comprise BaSO 4 And/or CaCO 3 And/or a carbon-based filler.
The foregoing compositions of the friction material are given by way of example only, and any composition known to those skilled in the art may be suitable for use in the present invention.
In this case, the friction material is in a "non-crosslinked" state because the thermosetting resin constituting it is not crosslinked. These thermosetting resins can be crosslinked by curing or thermocompression.
The amount of friction material in the non-crosslinked state, and thus the thickness of the preform made of the friction material in the non-crosslinked state, is determined such that the cured thickness is less than 5%, for example less than 3%, greater than the desired thickness of the friction lining.
During the oversize phase S2, an oversize 4a or 4b made of composite material is provided on at least one of the two opposite faces of the preform made of friction material in the non-crosslinked state.
According to the embodiment of fig. 3, oversize dimensions 4a and 4b are provided on two opposite faces 2a and 2b of the preform 2 of friction material. This embodiment is not limiting; it is entirely possible to deposit oversize on only one of the two opposite faces of the preform.
The composite material of oversize 4a or 4b comprises a mixture of fibres of variable length and variable section and a thermosetting resin in a non-crosslinked state.
The fibers may be composed of filaments that are isolated from each other and randomly oriented in space.
The oversized composite material may also comprise a mixture of particles and/or powders of inorganic nature and/or inert fillers and/or wetting agents of organic nature and/or active polymers and/or metallic particles.
For example, the fibers may have a variable size greater than or equal to 50 μm and less than or equal to 300 μm.
The particles of the mixture may have a diameter of less than 50 μm.
The oversized composite material may for example comprise at least 25% by weight and at most 45% by weight of fibres and/or powders of inorganic nature.
The oversized composite material may for example comprise at least 20% and at most 35% by weight of inert fillers of an organic nature.
The wetting agent may for example be water and/or a tackifier and/or PVA.
The reactive polymer may for example be a phenolic resin and/or a melamine/formaldehyde resin and/or a rubber.
The presence of the rubber makes it possible to obtain an elastic behaviour between the layers. Advantageously, this makes it possible to reduce the stress that may cause thickness deformation and prevent warpage of the composite material.
The oversized composite may for example comprise at least 30% and at most 50% by weight of the living polymer.
The oversized composite material may for example comprise at most 10 wt% of metal particles, preferably at most 5 wt%.
According to another embodiment, the preform is oversized, particularly by compression under low pressure, before being placed on one or both opposing faces of the preform of friction material in a non-crosslinked state.
Once the oversize made of composite material in the non-crosslinked state is provided on at least one of the two opposite faces of the preform made of friction material, the assembly is crosslinked during the curing phase S3, also known as curing under pressure or hot pressure.
The curing phase comprises heating an assembly comprising a preform 2 made of friction material in a non-crosslinked state and one or more oversize dimensions 4a and/or 4b at a pressure greater than or equal to 50 bar and less than or equal to 300 bar and at a temperature greater than or equal to 180 ℃ and less than or equal to 210 ℃ for a period of time greater than or equal to 1 minute and less than or equal to 15 minutes, so as to obtain a crosslinked assembly comprising a preform made of friction material in a crosslinked state and oversize dimensions in a crosslinked state.
Prior to the curing stage, the preform 2 made of friction material in the non-crosslinked state and the one or more oversize dimensions 4a and/or 4b may be positioned in a mold suitable for hot compression and known to the person skilled in the art.
The curing procedure is given by way of example only and any curing method or apparatus known to those skilled in the art that makes it possible to crosslink thermosetting resins may be adapted for the application of the present invention.
Fig. 4 shows a cross-link assembly 10 comprising a preform 6 made of a friction material in a cross-linked state and two oversize dimensions 8a and 8b in a cross-linked state on two opposite faces of the preform 6.
This embodiment is not limiting; it is entirely possible to deposit oversize on only one of the two opposite faces of the preform.
During the curing stage S3, inhomogeneities occur at the surface of the two opposing faces 8a and 8b of the crosslinked assembly 10. These non-uniformities may be thickness variations on the order of 0.1 to 0.3mm and are not shown in fig. 4.
Preferably, the friction lining has a very small variation in thickness and their opposite faces are parallel to each other in order to provide satisfactory operation of the final product.
In order to eliminate surface irregularities, a machining stage S4 is carried out. During the working phase, at least one face of the cross-link assembly 10 is worked so as to remove one or more oversize dimensions 8a and/or 8b in the cross-linked state and obtain a friction lining in the cross-linked state with the opposite faces parallel to each other. Fig. 5 shows a cross-link assembly 10 and a processing region 12.
Oversized composites do not have the same physical properties and the same mechanical strength as friction materials; therefore, it is preferable to remove the oversize so that the composite is no longer present in the friction lining rather than in the trace state. To this end, the processing stage may remove 10% to 30% of the thickness of the cross-linked component.
The material removed during the processing stage may for example comprise at least 80% by weight of the oversized composite material in the cross-linked state.
The machining stage S4 may be capable of removing the oversize up to the interface between the oversize and the friction material. The machined area 12 shown in FIG. 5 extends slightly above the friction material 6 in the cross-linked state. Thus, during the machining stage, a portion of the friction material may be removed at the interface with the oversized dimension.
According to a preferred embodiment, the composite material of oversize 4 may be at least partially produced from thermosetting composite waste, in particular dust from the processing of friction linings or the grinding thereof. The composition of the friction material of the preceding friction lining can thus end up partly in the oversized composite material.
As described above, the working stage makes it possible to obtain a lining free from thickness variations and having opposite faces parallel to each other. Such processing generates waste materials, such as processing dust.
This process dust consists of powder, small fibers and constitutes a complex mixture, no longer having the mechanical properties of the raw material from which it originates.
Currently, composite materials with organic matrices are recovered by coincidence, pyrolysis and density separation processes.
However, the products from these treatments are difficult to recover value and the treatments themselves have high energy costs.
The repeated use of process dust in the production of composite oversized materials has the advantages of recycling waste from the production of friction linings, improving control of the life cycle of the product and reducing the economic losses incurred.
Furthermore, with the subsequent removal of the oversize by machining, the composite material will not adversely affect the composition of the friction material of the friction lining or its mechanical properties and will only be present in the lining in the form of traces.
According to another embodiment, the preform of friction material is positioned on the surface of the support disc before being fixed by adhesive bonding during the curing phase S3.
FIG. 6 illustrates this embodiment by showing the preform 2 and support disk 13 of friction material in a non-crosslinked state. In this embodiment, the oversize is provided on the face of the preform 2 in contact with the support disc 16. Subsequently, a processing stage S3 is carried out on the same side.
Figure 7 shows a friction lining 14 obtained by the method according to the invention. The friction lining has no unevenness on its surface and has parallel facing surfaces 14a and 14b.
The friction lining is composed of a friction material in a cross-linked state. However, fiber residues of variable length and variable cross-section may be present in the resin matrix near the surface of the friction lining.
These variable length and variable cross-section fibers are derived from one or more oversized composites, and the friction material as such is comprised of uniform length fibers. The presence of such residues is explained by the migration of the reduced size fibres resulting from the oversize of one or more of the composite materials made during the curing stage S3.
The friction lining 14 may exhibit a decreasing concentration gradient of fibers of variable length, variable cross-section and variable chemical nature, starting from one of its two opposite faces 14a and 14b up to its centre.
The friction lining 14 may, for example, comprise a first region comprising oversized composite residues, in particular fibers of variable length and diameter, and a second region not having oversized composite residues.
For example, the first zone may extend from one of the two opposite faces of the friction lining and have a thickness of less than or equal to 15% of the total thickness of the friction lining, and the second zone may have a thickness of greater than or equal to 70% of the total thickness of the friction lining, as such.
When oversize is provided on the two opposite faces of the preform made of friction material during the manufacturing process, the friction lining 14 then comprises two zones which comprise residues and which extend from the two opposite faces of the friction lining towards its centre. The third area, which is free of residue, is located in the center of the friction lining.
The invention has been described above using embodiments presented in the drawings, without limiting the general idea of the invention.
Many other modifications and variations will suggest themselves to those skilled in the art upon consideration of the various embodiments shown in this patent application. These examples are given by way of illustration and are not intended to limit the scope of the invention, which is to be determined solely by the claims that follow.
In the claims, the word "comprising" does not exclude other elements or stages, and the use of the indefinite article "a" or "an" does not exclude a plurality. The mere fact that different features are recited in mutually dependent claims does not indicate that a combination of these features can be used to advantage. Finally, any reference signs used in the claims shall not be construed as limiting the scope of the invention.
Claims (8)
1. A method of manufacturing a friction lining for a brake disc or a clutch of a motor vehicle, comprising:
a) A stage of providing a preform during which a preform made of friction material in a non-crosslinked state comprising two opposite faces is provided,
b) An oversize phase during which an oversize made of a composite material comprising a mixture of fibres of variable length and cross section and a thermosetting resin in a non-crosslinked state is provided on one of the two opposite faces of a preform made of friction material in a non-crosslinked state,
c) A curing phase during which a preform comprising a friction material in a non-crosslinked state and an oversized assembly is heated at a pressure greater than or equal to 50 bar and less than or equal to 300 bar and at a temperature greater than or equal to 180 ℃ and less than or equal to 210 ℃ for a period of time greater than or equal to 1 minute and less than or equal to 15 minutes, so as to obtain a crosslinked assembly comprising a preform comprising a friction material in a crosslinked state and an oversized assembly in a crosslinked state,
d) A processing phase during which at least one face of the cross-linked assembly is processed so as to remove the oversize in the cross-linked state and obtain a friction lining in the cross-linked state with the opposite faces parallel to each other,
wherein the oversized composite comprises a mixture of fibres having a size greater than or equal to 50 μm and less than or equal to 300 μm,
wherein the oversized composite comprises at least 25% by weight and at most 45% by weight of fibres and/or powders of inorganic nature, and,
wherein the oversized composite comprises at least 30% and at most 50% by weight of the living polymer.
2. The method of claim 1, wherein 10% to 30% of the thickness of the cross-linked component is removed at the processing stage.
3. The method of any one of the preceding claims, wherein the oversized composite comprises at least one reactive polymer.
4. A method according to claim 3, wherein the reactive polymer is a phenolic resin, a melamine/formaldehyde resin and/or a rubber.
5. The method of claim 1, wherein the oversized composite material is produced at least in part from thermoset composite scrap.
6. The method of claim 5, wherein the thermoset composite waste is dust from the processing of friction linings.
7. The method of claim 1, wherein the preform of friction material is positioned on a surface of the support disk prior to being secured by the adhesive bond during the curing stage.
8. The method of claim 1, wherein an oversize is provided on two opposing faces of the preform of friction material during the oversize stage.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1656222 | 2016-06-30 | ||
| FR1656222A FR3053273B1 (en) | 2016-06-30 | 2016-06-30 | METHOD FOR MANUFACTURING A FRICTION TRIM |
| PCT/FR2017/051708 WO2018002508A1 (en) | 2016-06-30 | 2017-06-27 | Method for manufacturing a friction lining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109562575A CN109562575A (en) | 2019-04-02 |
| CN109562575B true CN109562575B (en) | 2023-02-17 |
Family
ID=57348800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780047420.7A Active CN109562575B (en) | 2016-06-30 | 2017-06-27 | Method for producing friction lining |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR20190025669A (en) |
| CN (1) | CN109562575B (en) |
| FR (1) | FR3053273B1 (en) |
| WO (1) | WO2018002508A1 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4388423A (en) * | 1981-11-02 | 1983-06-14 | Glennco Trust | Friction lining material |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090169836A1 (en) * | 2007-12-26 | 2009-07-02 | Christopher Michael Thomas | Polymer bonded web friction and anti-friction composites |
-
2016
- 2016-06-30 FR FR1656222A patent/FR3053273B1/en active Active
-
2017
- 2017-06-27 CN CN201780047420.7A patent/CN109562575B/en active Active
- 2017-06-27 WO PCT/FR2017/051708 patent/WO2018002508A1/en active Application Filing
- 2017-06-27 KR KR1020197002994A patent/KR20190025669A/en unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4388423A (en) * | 1981-11-02 | 1983-06-14 | Glennco Trust | Friction lining material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109562575A (en) | 2019-04-02 |
| KR20190025669A (en) | 2019-03-11 |
| WO2018002508A1 (en) | 2018-01-04 |
| FR3053273A1 (en) | 2018-01-05 |
| FR3053273B1 (en) | 2018-08-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20100000070A1 (en) | Reusable core carbon-carbon composite brake disc | |
| CN106122321B (en) | Method of preparing friction material and method of manufacturing brake pad using the same | |
| JP4766925B2 (en) | Friction material manufacturing method | |
| US4747476A (en) | Methods of making clutch driven plates | |
| KR102503720B1 (en) | friction material | |
| KR20120135087A (en) | Brake pad backing plate and brake pad usung the same | |
| EP0751317B1 (en) | Friction brake subassembly | |
| US3068131A (en) | Clutch facing | |
| CN109562575B (en) | Method for producing friction lining | |
| JP6171031B2 (en) | Carbon ceramic brake disc and method of manufacturing the same | |
| KR20120057879A (en) | Carbon-ceramic brake disc and method for manufacturing the same | |
| KR100776485B1 (en) | Manufacturing method for friction material | |
| CN108219746A (en) | The method of manufacture enhancing friction material | |
| KR101242079B1 (en) | Carbon-ceramic brake disc and method for manufacturing the same | |
| US20210138738A1 (en) | Alternative joining method | |
| JP5135151B2 (en) | Brake pad manufacturing method | |
| JP3391120B2 (en) | Manufacturing method of disc brake pad | |
| KR101304303B1 (en) | Carbon-ceramic brake disc and method for manufacturing the same | |
| KR20110095543A (en) | Carbon-ceramic brake disc and method for manufacturing the same | |
| FR3053274A1 (en) | METHOD FOR MANUFACTURING A FRICTION TRIM | |
| KR101180004B1 (en) | Carbon-ceramic brake disc and method for manufacturing the same | |
| RU2115513C1 (en) | Method for manufacturing friction article | |
| JP6584800B2 (en) | Manufacturing method of disc brake pad | |
| JP2019005898A5 (en) | Method for producing abrasive member having substantially disk shape and abrasive member | |
| WO2024069135A1 (en) | Brake pad unit, composite backing plate and method of manufacturing a backing plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |