| 摘要 |
<p>A seal unit for male elements of sanitary appliance casting moulds comprising at least one female mould part (3) defining the moulding cavity for the appliance, and at least one male mould part (4) to be inserted into and withdrawn from said moulding cavity and provided with a contacting surface intended to cooperate with a conjugate contacting surface of said at least one female mould part, comprises an annular elastic tubular body (6) which is positioned within a perimetral groove (5) formed in the contacting surface of said at least one male mould part and is connected to a unit arranged to alternately deflate and inflate said elastic tubular body such that it assumes a first transverse profile which is completely accommodated within the corresponding transverse profile of said groove, and a second transverse profile which projects beyond the mouth of said groove, where it rests against the facing conjugate contacting surface of said at least one female mould part. <IMAGE></p> |
