Patent ID: 6125539
Filing Date: 2000-10-03
Classification: B23P,F16F,Y10T

Abstract:
A process for producing a vibration isolator, comprising the steps of:forming an intermediate product including an axial member, an outside member and a rubber elastic member,the outside member having a cylinder-shaped portion disposed outside the axial member away therefrom by a predetermined distance and substantially coaxially therewith,the outside member furthermore having a bracket portion protruding from an outer peripheral surface of the cylinder-shaped portion in a radial direction,the bracket member being formed integrally with the cylinder-shaped portion,the rubber elastic member bing bonded to an outer peripheral surface of the axial member and to an inner peripheral surface of the cylinder-shaped portion and connecting the axial member and the cylinder-shaped portion integrally; anddrawing the cylinder-shaped portion with a drawing apparatus provided with a first drawing hole having a predetermined dimensional diameter being smaller than an outer peripheral diameter of the cylinder-shaped portion, and a second drawing hole guiding a protruding leading-end portion of the bracket portion into the cylinder-shaped portion side, by pressing the outside member into the first drawing hole and the second drawing hole along an axial direction of the cylinder-shaped portion, thereby diametrically reducing the cylinder-shaped portion to plastically deform the same, simultaneously making the bracket portion follow the dimensional variation of the cylinder-shaped portion to plastically deform the same.