| 摘要 |
A plastic tub for a clothes washing machine, in particular a washing machine of front-loading type, comprising a front shell (10) and a rear shell (11), the rear shell being formed by a cylindrical envelope (12) and a rear wall (13) provided with reinforcing ribs, a passing through hub (18) provided at the centre of the rear wall for supporting the bearing of a central shaft by means of which a clothes containing drum is driven into rotation within the tub, said hub (18) being made by cast iron over injected by plastic material. <??>The rear circular wall (13) of the rear shell (11) is shaped with a plurality of ribbed circular sectors (14,15) alternatively oriented in opposite axial direction, and at least one circular crown of radial ribs (21) is provided around the hub. <??>The tub structure results with a reduced and constant thickness of the rear part of the tub, so as the injection moulding cycle for producing it is correspondingly reduced. <IMAGE>
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