Casting process for producing barrel thread bushing of plastic extruding machine by using vertical injection and extrusion production line

The invention discloses a casting process for producing a barrel thread bushing of a plastic extruding machine by using a vertical injection-pressing production line and a manufacturing mold of the casting process, and belongs to the technical field of metallurgical casting. The method comprises the following process steps: producing the barrel thread bushing of the double-screw plastic extruding machine by using a vertical parting flaskless shoot-squeeze automatic molding production line, wherein the molding sand performance is controlled as follows: the moisture is 3.5%-4.5%, the air permeability is 100-140, the wet compression strength is 100-150 KPa, and the compaction rate is 34%-40%; when the positive pressure plate molding box and the negative pressure plate molding box are closed, a plurality of molding cavities for producing the barrel thread bushing blanks of the double-screw plastic extruding machine are formed, feeding heads are formed in the tops of the molding cavities, and inner gates are forme