| 摘要 |
PURPOSE:To minimize the permanent compression strain and at the same time obtain the fair surface on a rubber extruded part by a method wherein peroxide cure base agent is used as the rubber compounding agent of a sponge sealing part, against the surface of which electron rays are directed and, after that, which is cured by heating. CONSTITUTION:First, peroxide vulcanizing agent such as dicumyl peroxide is compounded as the rubber compound at a sponge sealing part 1. Secondly, an extruded part W equipped with the sponge sealing part 1 is past through an electron ray irradiating device so as to direct the predetermined amount of electron rays against it. In the case, heads 6, 6 and 6 of an electron ray accelerator are arranged so as to be able to uniformly irradiate the surface of the sponge sealing part 1 from three directions, for example. Finally, the extruded part, the surface layer part of the sponge sealing part 1 of which is electron radiation-induced cross-linked, is heated with a low pressure heating device, such as microwave heating device or hot air oven, fluidized bed heating device in order to complete the curing of it. |
