Abstract: A sand casting mold configured to cast a component and a method of forming the sand casting mold configured to cast the component by 3D printing are disclosed. The sand casting mold includes: an upper portion and a lower portion; a mold cavity defined by the upper portion and the lower portion; an upper sprue in the upper portion; a lower sprue which is in the lower portion and is in communication with the upper sprue; an upper runner which is in the upper portion, is separated from the upper sprue by a predetermined distance, and is in communication with the mold cavity; and a lower runner which is in the lower portion, is in communication with the lower sprue, is separated from the mold cavity in the lower portion, and has a first end in communication with the lower sprue, and a second end in communication with the upper runner. With the sand casting mold configured to cast the component according to the embodiments of the present invention, for example, a production cost can be reduced.

Abstract: A sand casting mold configured to cast a component and a method of forming the sand casting mold configured to cast the component by 3D printing are disclosed. The sand casting mold includes: an upper portion and a lower portion; a mold cavity defined by the upper portion and the lower portion; an upper sprue in the upper portion; a lower sprue which is in the lower portion and is in communication with the upper sprue; an upper runner which is in the upper portion, is separated from the upper sprue by a predetermined distance, and is in communication with the mold cavity; and a lower runner which is in the lower portion, is in communication with the lower sprue, is separated from the mold cavity in the lower portion, and has a first end in communication with the lower sprue, and a second end in communication with the upper runner. With the sand casting mold configured to cast the component according to the embodiments of the present invention, for example, a production cost can be reduced.

Abstract: In a scroll machining method, a scroll has a disc-like end plate and a scroll wall extending from a first side surface of the disc-like end plate, and the scroll is driven to rotate around a center axis C of the scroll, and a first cutter machines a side wall surface of the scroll wall while the scroll is rotating. The first cutter is a non-rotary cutter. When the scroll is machined, the scroll rotates around its center axis, and the first cutter does not rotate around its axis, thereby improving the scroll's machining precision and machining efficiency.

Abstract: In a scroll machining method, a scroll has a disc-like end plate and a scroll wall extending from a first side surface of the disc-like end plate, and the scroll is driven to rotate around a center axis C of the scroll, and a first cutter machines a side wall surface of the scroll wall while the scroll is rotating. The first cutter is a non-rotary cutter. When the scroll is machined, the scroll rotates around its center axis, and the first cutter does not rotate around its axis, thereby improving the scroll's machining precision and machining efficiency.