PROCEDE DE FABRICATION DE PIECES DE FRICTION ET PIECES FABRIQUEES SUIVANT CE PROCEDE

• Main Authors: A.M. GRIFFITH, R.H. GILBERT
• Format: Patent
• Language: French
• Published: 16.09.1971
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BLASTING; BRAKES; CHEMISTRY; CLUTCHES; COMPOSITIONS BASED THEREON; COUPLINGS FOR TRANSMITTING ROTATION; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; THERMAL INSULATION IN GENERAL; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WEAPONS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

1350268 Moulding friction elements ABEX CORP 19 April 1971 [21 April 1970] 27008/71 Heading B5A Friction elements such as brake shoes or linings are moulded from a composition having fillers including at least 5 % by weight of asbestos fibres and a thermosetting resin binder, the composition being placed in a die cavity conforming in shape to the desired element and subjected in a first stage to a constant pressure for a sufficient time to expel all air entrapped in the composition, and thereafter, in a second stage, gradually increasing the initial pressure to a value producing the desired density for the composition; the thus pressed article is then stripped from the die cavity and heated to cure the binder. The fillers may include cast iron, graphite and alumina particles.