Molding method, equipment for carrying out said method and mold obtained by means of said method

Abstract

A molding method, equipment for carrying out said method and mold obtained by means of said method are disclosed. The method comprises obtaining at least two semi-molds ( 23, 24 ), wherein each semi-mold ( 23, 24 ) is obtained outside the axis of advance ( 3 ) by sand blowing by means of horizontal molding on a pattern plate ( 15, 16 ) which is located horizontally during said molding, said pattern plate ( 15, 16 ) defining an impression on one face of each semi-mold ( 23, 24 ). The method comprises rotating 90° and vertically facing said at least two semi-molds ( 23, 24 ) to one another by the faces incorporating the impression to define a cavity ( 26 ) which can be filled with the molten material of the part to be obtained. The molding equipment comprises at least a shooting chamber ( 4, 5 ) comprising a sand blowing chamber ( 20 ), located outside the axis of advance ( 3 ), wherein the semi-mold ( 23, 24 ) can be obtained and rotating means ( 27 ) for rotating the pattern plate ( 15, 16 ) with the semi-mold ( 23, 24 ) 90° for the vertical arrangement thereof and transferring means ( 6,7 ) for transferring the semi-mold ( 23, 24 ) to a semi-mold assembly area ( 8 ) provided in the mold axis of advance ( 3 ). The mold obtained comprises two semi-sand molds ( 23, 24 ) comprising an impression on one face, such that once facing one another by the face of the impression they comprise a casting basin ( 21 ) the volume of which is at least 15% of the volume of the cavity ( 26 ) defined by the facing impressions of both semi-molds ( 23, 24 ).

1 . Molding method comprising obtaining sand molds by means of pressure blowing, wherein said molds move forward along an axis of advance of a mold line in order to pour the molten material into a cavity defined by said molds, wherein the method comprises obtaining at least two semi-molds, wherein each semi-mold is obtained outside the axis of advance by sand blowing by means of horizontal molding on a pattern plate which is located horizontally during said molding, said pattern plate defining an impression on one face of each semi-mold, and it comprises rotating 90° and vertically facing said at least two semi-molds to one another by the faces incorporating the impression, to define a cavity which can be filled with the molten material of the part to be obtained. 
     
     
         2 . Method according to  claim 1 , wherein during the molding process, the pattern plate defines in each semi mold, on one side face, a semi-basin, such that a basin is defined once said at least two semi-molds are facing one another by the faces incorporating the impression. 
     
     
         3 . Method according to  claim 2 , wherein the volume of the basin defined by each pair of semi-molds is at least 15% of the volume of the cavity defined by said semi-molds. 
     
     
         4 . Method according to  claim 1 , wherein said at least two semi-molds are obtained in two shooting chambers located outside the axis of advance. 
     
     
         5 . Method according to  claim 1 , which comprises using a single piston serving exclusively for assembling and pushing the vertically facing semi-molds according to the axis of advance. 
     
     
         6 . Method according to  claim 1 , which comprises obtaining at least one male semi-mold, which has a flange on the face opposite the impression, and at least one female semi-mold, which has a notch on the face opposite the impression configured for receiving by bridle joint attachment means the flange of the male semi-mold. 
     
     
         7 . Molding equipment for obtaining sand molds by means of pressure blowing, comprising an axis of advance of a mold line wherein molten material can be poured into a cavity defined by said molds, wherein it comprises at least one shooting chamber comprising a sand blowing chamber, located outside the axis of advance, wherein a semi-mold can be obtained by means of horizontal molding, wherein said at least one shooting chamber comprises a pattern plate which is located horizontally during said molding, said pattern plate defining an impression on one face of the semi-mold, and it comprises rotating means for rotating the pattern plate with the semi-mold 90° for its vertical arrangement and transferring means for transferring the semi-mold to a semi-mold assembly area provided in the mold axis of advance such that the semi-molds are facing one another by the faces incorporating the impression, defining a cavity which can be filled with the molten material of the part to be obtained. 
     
     
         8 . Equipment according to  claim 7 , wherein during the molding process, the pattern plate defines in each semi-mold, on one side face, a semi-basin, such that a basin is defined once the two semi-molds are facing one another by the faces incorporating the impression. 
     
     
         9 . Equipment according to  claim 8 , wherein the volume of the basin defined by a pair of semi-molds is at least 15% of the volume of the cavity defined by said semi-molds. 
     
     
         10 . Equipment according to  claim 7 , comprising at least two shooting chambers, located outside the axis of advance, wherein at least two semi-molds can be obtained. 
     
     
         11 . Equipment according to  claim 7 , comprising a single closing and pushing piston serving exclusively for closing the vertically facing semi-molds according to the axis of advance to form the mold and for pushing the formed mold until it is placed against the row of molds. 
     
     
         12 . Mold obtained by means of a method according to  claim 1 , comprising two semi-molds of sand comprising an impression on one face, such that once facing one another by the face of the impression they comprise a casting basin the volume of which is at least 15% of the volume of the cavity defined by the facing impressions of both semi-molds. 
     
     
         13 . Mold according to  claim 12 , comprising a male semi-mold, which has a flange on the face opposite the impression, and a female semi-mold, which has a notch on the face opposite the impression configured for receiving the flange of the male semi-mold by bridle joint attachment means.