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Saturday, 26 April 2014

Casting Defects

Casting Defects Points : Casting Defects Some kind of defects might take place through casting greatly reducing the total output of castings besides raising the cost of their creation. It is thus essential to know the causes behind these defects so that they may he properly eliminate. Casting defects may be define as those characteristics that create a deficiency or defect converse to the excellence specifications imposed by the design with the service necessities. Defects in castings may be of three basic types:

(i) Small defects, which visibly allow. The casting to be inexpensively salvaged and thereby leave sensible margining for profit.
(ii) Detect that can be remind but whose cost of repair might not defend the recover attempt.
(iii) Main defects which cannot be rectified, resulting in rejection of casting and total loss.
Mostly the defects might be recognized to: (i) Application of unsatisfactory moulding or costing practice by the individual worker or wrong advice by the controller.
(ii) Inappropriate or unacceptable raw materials use in moulding, core make or castings.
(iii) Unethical administration policy relating to the fixing of inducement plans and setting up of production procedure defective organization and poor work regulation, or lack of guidance.
(iv) Use of unseemly tools, equipment, appliances or patterns.

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