Back to results
US 4,074,867 AGranted
Method and apparatus for comminuting sand clods
OwnerHermann Jacobinventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerHermann Jacobinventor
Estimating the term…
A method and apparatus for removing form sand from a casting box and for comminuting and sand clods formed by the sand removed from the box, in which the casting box is placed on a grate having two grate portions, preferably tiltable about spaced tilting axes between a first position, in which the grate portions are located in a common substantially horizontal plane for receiving a filled casting box on its upper surface, and a second position in which the two grate portions extend upwardly inclined from a center line of the grate. The grate portions are vibrated in the first and in the second position by vibrators connected thereto to remove first the form sand from the casting box and to hold, after removing of the casting box and the casting from the grate, any sand clods, which have not been passed through the grate during the first vibration step, between the upwardly inclined grate portions so that the sand clods will rub against each other and the grate portions to be comminuted thereby during the second vibration step.
A method for removing form sand from a casting box and for comminuting any sand clods formed by the sand removed from the box, comprising the steps of placing a casting box having an open side with the sand and the cast product therein with the open side of the box on a planar substantially horizontally extending upper surface of a grate;
Apparatus for removing form sand from a casting box and for comminuting any sand clods formed by the sand removed from the box, comprising a grate having at least two grate portions each having an inner and an outer end and being tiltable about a common longitudinal tilting axis between a first position in which said at least two grate portions extend in a common substantially horizontal plane and a second position in which the outer ends of said grate portions are upwardly displaced out of said plane so that the two grate portions extend upwardly inclined from a center line of the grate;
Apparatus for removing form sand from a casting box and for comminuting any sand clods formed by the sand removed from the box, comprising a grate having at least two grate portions movable between a first position in which said at least two grate portions extend in a common substantially horizontal plane and a second position in which said at least two grate portions extend upwardly inclined from a center line of said grate, each of said grate portions being tiltable about a fixed axis located between opposite ends of the respective grate portion;
Apparatus for removing form sand from a casting box and for comminuting any sand clods removed from the box, comprising a grate having at least two grate portions movable between a first position in which said at least two grate portions extend in a common substantially horizontal plane and a second position in which said at least two grate portions extend upwardly inclined from a centerline of the grate, each of said grate portions being tiltable about a fixed horizontal tilting axis located between opposite ends of the respective grate portion and said tilting axis of each grate portion being located relative to the center of gravity thereof so that said grate portions normally assume, due to their own weight, said second position;
Apparatus for removing form sand from a casting box and for comminuting any sand clods removed from the box, comprising a grate having at least two grate portions movable between a first position in which said at least two grate portions extend in a common substantially horizontal plane and a second position in which said two grate portions extend upwardly inclined from a center line of said grate, said grate portions being respectively tiltable about fixed horizontal tilting axes;
Dependencies are inferred from the claim text.