Integrated sand core for integrated molding of railway wagon side frame guiding frame and stop key mounting surface as well as production method of integrated sand core

The invention discloses an integrated sand core for integrated molding of a railway wagon side frame guiding frame and a stop key mounting surface as well as a production method of the integrated sand core. The integrated sand core comprises a sand core part A for molding the railway wagon side frame guiding frame and a sand core part B for molding the stop key mounting surface, wherein the sand core part B is the part that the sand core part A extends in the vertical direction of the sand core part A and enlarges in the width direction to contain the stop key mounting surface, and the sand core part A and the sand core part B constitute the sand core adopting an integrated structure. Different from the technological method for molding the guiding frame and the stop key mounting surface respectively by using a sand core and a contour, the integrated sand core is used for molding the side frame guiding frame and the stop key mounting surface, that is, the side frame stop key mounting surface is molded while the side frame guiding frame is molded integrally by the aid of the integrated sand core, so that the side frame stop key mounting surface is free of draft angles, steps and trimming, the appearance quality and the inherent quality of the stop key mounting surface are effectively improved, and the cleaning work intensity of repair welding, polishing and the like caused by appearance molding is reduced.