Method for producing a cylinder for a two-stroke engine and casting core therefor

Abstract

The invention relates to a method for producing a cylinder ( 10, 110 ) for a two-stroke engine, comprising the following steps: producing a casting core ( 30, 130 ), wherein a central core slide ( 31, 131 ) for the cylinder chamber ( 11, 111 ) and at least one salt core ( 33, 133 ) for an overflow channel ( 18, 19; 118, 119 ) are produced and the at least one salt core ( 33, 133 ) is connected to the central core slide ( 31, 131 ), inserting the casting core ( 30, 130 ) into a casting mold, casting the cylinder ( 10, 110 ) in a die-casting process, removing the central core slide ( 31, 131 ) from the cylinder ( 10, 110 ), wherein the at least one salt core ( 33, 133 ) is separated from the central core slide ( 31, 131 ), and flushing the at least one salt core ( 33, 133 ) out of the cylinder ( 10, 110 ). The invention further relates to a casting core ( 30, 130 ) for such a method.

1 . Method for the production of a cylinder ( 10 ,  110 ) for a two-stroke engine, having the following method steps:
 production of a casting core ( 30 ,  130 ), wherein a central core slide ( 31 ,  131 ) for the cylinder chamber ( 11 ,  111 ) and at least one salt core ( 33 ,  133 ) for an overflow channel ( 18 ,  19 ;  118 ,  119 ) are produced, and the at least one salt core ( 33 ,  133 ) is connected with the central core slide ( 31 ,  131 ),   introduction of the casting core ( 30 ,  130 ) into a casting mold,   casting of the cylinder ( 10 ,  110 ) using a die-casting method,   removal of the central core slide ( 31 ,  131 ) from the cylinder ( 10 ,  110 ), wherein the at least one salt core ( 33 ,  133 ) is separated from the central core slide ( 31 ,  131 ),   flushing of the at least one salt core ( 33 ,  133 ) out of the cylinder ( 10 ,  110 ).   
     
     
         2 . Method according to  claim 1 , wherein the at least one salt core ( 33 ,  133 ) is pressed. 
     
     
         3 . Method according to  claim 1 , wherein the at least one salt core ( 33 ,  133 ) is sintered. 
     
     
         4 . Method according to  claim 1 , wherein the at least one salt core ( 33 ,  133 ) is produced using the injection-molding method. 
     
     
         5 . Method according to  claim 1 , wherein the at least one salt core ( 33 ,  133 ) is produced from sodium chloride as the main component. 
     
     
         6 . Method according to  claim 1 , wherein the at least one salt core ( 33 ,  133 ) is produced from potassium chloride as the main component. 
     
     
         7 . Method according to  claim 1 , wherein the at least one salt core ( 33 ,  133 ) is produced using at least one alkali carbonate and/or at least one earth alkali carbonate. 
     
     
         8 . Method according to  claim 1 , wherein the central core slide ( 31 ,  131 ) is produced from a steel material. 
     
     
         9 . Method according to  claim 1 , wherein the cylinder ( 10 ,  110 ) is cast from an aluminum alloy. 
     
     
         10 . Casting core ( 30 ,  130 ) for the production of a cylinder ( 10 ,  110 ) for a two-stroke engine, having a central core slide ( 31 ,  131 ) for the cylinder chamber ( 11 ,  111 ), wherein at least one salt core ( 33 ,  133 ) for an overflow channel ( 18 ,  19 ;  118 ,  119 ) is connected with the central core slide ( 31 ,  131 ). 
     
     
         11 . Casting core according to  claim 10 , wherein the at least one salt core ( 33 ,  133 ) is pressed. 
     
     
         12 . Casting core according to  claim 10 , wherein the at least one salt core ( 33 ,  133 ) is sintered. 
     
     
         13 . Casting core according to  claim 10 , wherein the at least one salt core ( 33 ,  133 ) is produced using the injection-molding method. 
     
     
         14 . Casting core according to  claim 10 , wherein the at least one salt core ( 33 ,  133 ) consists of sodium chloride as the main component. 
     
     
         15 . Casting core according to  claim 10 , wherein the at least one salt core ( 33 ,  133 ) consists of potassium chloride as the main component. 
     
     
         16 . Casting core according to  claim 10 , wherein the at least one salt core ( 33 ,  133 ) contains at least one alkali carbonate and/or at least one earth alkali carbonate. 
     
     
         17 . Casting core according to  claim 10 , wherein the central core slide ( 31 ,  131 ) consists of a steel material.