Manufacture of a Small Leather Cup and Investigation of the Process of Impregnation with Candle Wax

摘要

A new small deepwell pump, the CEW 49 D pump, is under design to be coupled to the CWD 2000 windmill. The leather cup of this pump has been manufactured according to the procedure which is also used for leather cup of other CWD pumps. To investigate if it is possible to manufacture more flexible cups which cause less friction, two different types of cow leather were studied. One type is chrome tanned leather; the other type is vegetable tanned leather as used for harnesses of horses. With both types of leather, some leather cups have been manufactured and tested.