LAMINATED RUBBER SUPPORT BODY

摘要

PURPOSE:To give stable creep characteristic by laminating metal plates and rubber plates in non-bonding manner or by reducing bonding area and realizing the composition of rubber plate in which carbon black is blended into natural rubber or polyisoprene rubber at a specific ratio and which does not contain softener. CONSTITUTION:A laminated rubber support body consists of a plural number of metal plates 6, 7 and rubber plates 5 which are laminated alternately in non-bonding manner or in the condition where bonding area is reduced. Natural rub rubber or polyisoprene rubber of polymer of synthetic isoprene is used as component of rubber plate, and softener such as stearic acid and rosin which is added to rubber usually is not blended. Carbon black is blended at the ratio of 20 weight parts or less for 100 weight parts of rubber to improve strength. It is vulcanized and molded to prepare the rubber plate having the predetermined thickness. Additive of amine or phenol system can be blended to improve ageing characteristics. Owing to the above composition, creep amount for load in vertical direction is small and variation with the lapse of time is scarcely observed. Good vibration-free performance can be obtained for a long period of time.