PIPE FOR CONVEYING ABRASIVE MATERIALS SUCH AS CONCRETE, APPARATUS AND METHOD FOR PRODUCING SAID PIPE
First Claim
1. Method for producing a tube or curved segment of tube for transferring abrasive materials, comprising a curved external tubular element and a curved internal tubular element made of a material having a resistance to wear greater than that of the curved external tubular element and having a cross section such as to cover at least part of the internal surface of the curved external tubular element, wherein the method provides to make said curved external tubular element and said curved internal tubular element separately,the method comprising:
- heating said curved external tubular element at least to around its temperature of deformation,inserting said curved internal tubular element inside said curved external tubular element,closing a mold to form the curved external tubular element on the exact geometry of the curved internal tubular element, exploiting the heated condition of the curved external tubular element, andopening the mold and cooling with consequent shrinkage of the curved external tubular element on the curved internal tubular element.
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Accused Products
Abstract
Method and apparatus for producing a curved tubular segment comprising obtaining a curved external tubular element and a curved internal tubular element made of a material having a resistance to wear greater than that of the curved external tubular element and having a cross section such as to cover at least part of the internal surface of the curved external tubular element. It provides the insertion of the curved internal tubular element inside the curved external tubular element after heating the latter by means of a heating unit. Moreover, to form the curved external tubular element on the exact geometry of the curved internal tubular element a molding unit and a cooling unit are used to obtain a curved tubular segment without spaces between the curved external tubular element and the curved internal tubular element.
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Citations
12 Claims
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1. Method for producing a tube or curved segment of tube for transferring abrasive materials, comprising a curved external tubular element and a curved internal tubular element made of a material having a resistance to wear greater than that of the curved external tubular element and having a cross section such as to cover at least part of the internal surface of the curved external tubular element, wherein the method provides to make said curved external tubular element and said curved internal tubular element separately,
the method comprising: -
heating said curved external tubular element at least to around its temperature of deformation, inserting said curved internal tubular element inside said curved external tubular element, closing a mold to form the curved external tubular element on the exact geometry of the curved internal tubular element, exploiting the heated condition of the curved external tubular element, and opening the mold and cooling with consequent shrinkage of the curved external tubular element on the curved internal tubular element. - View Dependent Claims (2)
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- 3. Curved tubular segment for conveying abrasive materials, comprising a curved external tubular element and at least a curved internal tubular element housed inside said curved external tubular element, and having a cross section such as to cover at least part of the internal surface of the curved external tubular element and made of a material having a resistance to wear greater than that of the curved external tubular element, wherein said curved internal tubular element is inserted inside said curved external tubular element after the latter has been heated, and said curved external tubular element is formed on the exact geometry of said curved internal tubular element by applying pressure by a mold and subsequent shrinkage by cooling.
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12. Apparatus for producing a curved tubular segment for conveying abrasive materials, the curved tubular segment having a curved external tubular element and at least a curved internal tubular element housed inside said curved external tubular element, and having a cross section such as to cover at least part of the internal surface of the curved external tubular element and made of a material having a resistance to wear greater than that of the curved external tubular element, wherein said curved internal tubular element is inserted inside said curved external tubular element after the latter has been heated, and said curved external tubular element is formed on the exact geometry of said curved internal tubular element by applying pressure by a mold and subsequent shrinkage by cooling,
the apparatus comprising: -
at least one heating unit to heat the curved external tubular element to a value near its temperature of deformation; at least one molding unit consisting of at least one forming mold having an internal conformation mating with the geometry of the curved external tubular element, comprising at least a mobile part having a closed position in which it applies pressure to the external surface of the curved external tubular element against the external surface of the curved internal tubular element; and at least one cooling unit to obtain the shrinkage effect of the curved external tubular element.
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Specification