Patent US2539101A successfully refreshed from Google Patents.
EP0100233A1
Expired / Lapsed
EP
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Method of and apparatus for making disc brake pads and like products
Assignee: ATK Launch Systems LLC
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Filing: 1983-07-25
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Granted: —
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Expires: 2003-07-25
Abstract
Abstract A method of and apparatus for making disc brake pads and like products comprises producing a continuous flow of a ribbon-like blended but uncured hydrocarbon cold forming friction formulation (24), pressing or stamping out (at 34) form-retaining shaped disc brake pads or preforms (36) from the ribbon-like formulation, and curing the preforms in an oven (42) at an appropriate temperature for several hours.. Featured is the recovery of uncut trimmings and reincorporation in the uncured hydrocarbon cold forming friction formulation for recycling, the fabrication of composite brake pads or preforms in which metal components useful for installation purposes are incorporated in the preforms while still uncured, and the production of disc brake pads or other preforms in a continuous manner by automatic machinery.
Inventors
- 👤 John P. Gallagher
- 👤 Philip P. Dougherty
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 09:03
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/025; F16D69/026
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
71 words
A method of making friction elements such as disc brake pads and like products from blended hydrocarbon cold forming friction materials comprising the steps of: producing a ribbon(24) of material from said blended hydrocarbon cold forming materials, pressing out the operation of a blanking die(34) at least one shaped friction element preform (36) from said ribbon of material, and curing said friction element preform by the application of heat (at 42).
Claim 2
Independent Claim
71 words
A method of making friction elements such as disc brake pads and like products from blended hydrocarbon cold forming friction materials comprising the steps of: producing a ribbon(24) of material from said blended hydrocarbon cold forming materials, pressing out the operation of a blanking die(34) at least one shaped friction element preform (36) from said ribbon of material, and curing said friction element preform by the application of heat (at 42).
Claim 3
Dependent Claim
36 words
A method as specified in claim 1 wherein said hydrocarbon cold forming friction materials comprise a liquid thermosetting resin binder that is thoroughly blended with various fibers and particles that, conventionally, are added to friction materials.
Claim 4
Dependent Claim
41 words
A method as specified in claim 2 wherein said hydrocarbon cold forming materials include inorganic fibers, cellulose fibers, optionally carbon and/or graphite particles, and a liquid thermosetting organic binder comprising a homopolymer or copolymer of butadiene which has terminal functional groups.
Claim 5
Dependent Claim
19 words
A method as specified in claim 3 wherein said liquid thermosetting organic binder is a hydroxyl terminated butadiene copolymer.
Claim 6
Dependent Claim
67 words
A method as specified in claim 4 wherein said hydroxyl terminated butadiene copolymer has the empirical formula where X is phenyl or CN, a has a value of from 0.5 to 0.95, b has a value of from 0.05 to 0.5, and n is an integer from about 10 to 140; the binder having been cured with from about 0.1 to about 5 percent of peroxide catalyst..
Claim 7
Dependent Claim
29 words
-A method as specified in claim 2 wherein said hydrocarbon cold forming materials include metallic materials and graphite particles bonded together with a liquid thermosetting hydroxyl terminated butadiene copolymer.
Claim 8
Dependent Claim
68 words
A method as specified in claim 6 wherein said hydroxyl terminated butadiene copolymer has the empirical formula wherein X is phenyl or CN, a has a value of from 0.5 to 0.95, b has a value of from 0.05 to 0.5, and n is an integer from about 10 to 140; the copolymer having been cured with from about 0.02 to about 12.5 percent of a peroxide catalyst.
Claim 9
Dependent Claim
37 words
any preceding 8. A method as specified in any preceding claim, wherein said blended hydrocarbon cold forming materials are ueezed in a rolling will (16)to compact the materials into a ribbon(24) of substantially uniform thickness and width.
Claim 10
Dependent Claim
34 words
any preceding 9. A method as specified in/claim , further including the step of subjecting said shaped friction elenent preform (36), while as yet uncured, to pressure (at 38) to ecrease the surface porosity
Claim 11
Dependent Claim
59 words
10 . A method as specified in any preceding claim, wherein a plurality of shaped friction element preforms (36) are simultaneously pressed out with each operation of said blanking die(34) and wherein said plurality of preforms are cured simultaneously by the application of heat(at 42) at a temperature of about 350° to 60D°F. for a period of several hours.
Claim 12
Independent Claim
73 words
A method as specified in any preceding claim,1 further including the steps of cutting said ribbon of material(24) into a plurality of segments, stacking said segments(at 30) successively pressing out by the operation of a blanking die34 a plurality of shaped friction element preforms(36) from each of said segments, disposing said shaped friction element preforms in stacks(4), and curing said stacks of shaped friction element preforms by the application of heat (at 42).
Claim 13
Dependent Claim
24 words
A method as specified in claim 11, further including the step of reincorporating residue of said segments/in said blended hydrocarbon cold forming friction materials.
Claim 14
Dependent Claim
34 words
A method as specified in claim 11 or claim 12, further including the step of incorporating a metal component insert with at least some of said shaped friction element preformed prior to curing thereof.
Claim 15
Dependent Claim
70 words
Apparatus for making friction elements such as disc brake pads and like products from blended hydrocarbon cold forming friction materials comprising, first means (16) for producing a continuous flow of said materials in the form of a ribbon (24), second means(34) to press out at least one shaped friction. element preform (36) from said ribbon, and third means(42) to apply heat to said friction element preform for the curing thereof.
Claim 16
Dependent Claim
70 words
Apparatus for making friction elements such as disc brake pads and like products from blended hydrocarbon cold forming friction materials comprising, first means (16) for producing a continuous flow of said materials in the form of a ribbon (24), second means(34) to press out at least one shaped friction. element preform (36) from said ribbon, and third means(42) to apply heat to said friction element preform for the curing thereof.
Claim 17
Dependent Claim
34 words
-Apparatus as specified in claim 14, wherein said hydrocarbon cold forming friction materials comprise a liquid thermosetting binder that is thoroughly blended with various fibers and particles that, conventionally, are added to friction materials.
Claim 18
Dependent Claim
46 words
or 15, 16. Apparatus as specified in claim 14/further including a mixing mill(10) in which said blended hydrocarbon cold forming materials are formed by the blending of inorganic fibers, optionally carbon and/or graphite particles, and a liquid thermosetting inorganic binder comprising a hydroxyl terminated butadiene copolymer.
Claim 19
Dependent Claim
50 words
Apparatus as specified in claim 16, wherein said mixing mill includes automatic screw supply means, and wherein said first means includes surge hopper means, a rolling mill and a compression and stripper knife, said automatic screw supply means feeding said blended hydrocarbon cold forming materials to said surge hopper means.
Claim 20
Dependent Claim
68 words
Apparatus as specified in any of claims 14 to 17, wherein said first means further includes a knife segment cutter (25) for cutting said :.r.ibbon of material in segments (28) and means (30) for stacking said segments, and said second means includes a disc segment die-cut press (34) that is operative to press out said at least one shaped friction element preform from each of said stacked segments.
Claim 21
Dependent Claim
32 words
Apparatus as specified in claim 18, wherein said disc segment die-cut press includes a plurality of blanking dies for pressing out a plurality of shaped friction element preforms in each pressing operation.
Claim 22
Dependent Claim
32 words
Apparatus as specified in any of claims 14 to 19, wherein said third means comprises an oven, and further including means for conveying said stacked shaped friction element preforms into said oven..
Claim 23
Dependent Claim
37 words
Apparatus as specified in any of claims. 17 to 20, further including means (14) for recovering trimmings from said segments (28) and reincorporating said trimmings in said blended hydrocarbon cold forming materials in said surge hopper (14).
References Cited (Backward Citations)
US2811750A
Cited
US4125496A
Cited
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