DE400837C - End ring for centrifugal molds - Google Patents

Description

End ring for centrifugal casting molds. A well-known deficiency in watering of pipes and other hollow bodies in centrifugal casting is that after pouring a little metal still flows into the form, which unites as "overflowing metal" undesired approach at the end of the pipe-forms. This is when pulling out the tube the mold often gives rise to cracks which make the cast body unusable do. Apart from this, the removal of the approach requires special each time Job. To avoid these inconveniences, one has a closing ring at the end of the casting mold used from the height of the intended pipe wall thickness. The ones that have been used so far Rings of this type, however, only incompletely fulfill their purpose, since they are used throughout have straight inner walls and with a straight inner surface; the ring wall a smooth one Separation of the pipe body from the overflowing metal is not guaranteed. According to the invention Now (see fig.) the ring z sitting on the casting mold r is attached to its inner wall provided with an approach whose cross-section forms a triangle, which with his Point to the long axis of the shape. This creates a sharp edge on the inner wall of the ring. This, in connection with the centrifugal effect, separates in a simple manner the overflowing metal from the cast pipe and guaranteed a completely smooth pipe end that no longer requires any special processing.

Claims (1)

PATENT CLAIM: End ring for casting molds for separating the casting from the overflowing metal during the production of hollow bodies by centrifugal casting, characterized in that the inner ring wall is provided with a shoulder which has the cross-section of a triangle.