Abstract: A universal radius metal forming system wherein a bottom die elastomer is used on a sheet metal bending machine or press brake. The bottom die includes a forming pad used in combination with a wear pad to form virtually any radius in any type of metal. The forming pad includes a bottom cavity that is sized according to the volumetric relationship with the press punch. The wear pad is designed and coupled to the forming pad according to the gauge and shape of the metal being bent.

Abstract: A compound type polyurethane toilet seat, comprising a surface coating layer, a positioning structure and a seat support; the surface coating layer is made from polyurethane and seamlessly covers the outer surface of the seat support by means of the positioning structure; the preparation process comprises: step 1, spraying a release agent and an in-mold paint in a cavity of a mold; step 2, cleaning the surface of the seat support; step 3, polishing or abrasive blasting; step 4, thermally treating the seat support; step 5, spraying the release agent in the cavity of the mold, and installing the seat support in the cavity of the mold; step 6, injecting a polyurethane raw material into the cavity of the mold, and shaking the mold; step 7, foaming the polyurethane raw material.