Showing papers on "Material flow published in 1971"

Automatic apparatus for packaging powdered material with uniform bag weight and with dust-free operation

Abstract: An automatic packaging apparatus for powdered material comprising a hopper for containing such material, a chamber disposed beneath said hopper and a housing arranged beneath the bottom of said chamber. Air inlet means are provided for admitting air into the chamber and the housing for fluidizing the material delivered thereto. The housing is provided with clog inhibiting means for urging the fluidized material through and out of said housing. Flow control means is connected to feed pipe means for controlling the rate of flow of the material through said feed pipe means, said filling means is associated with the flow control means for discharging the material into a bag, the filling means being provided with a flexible sleeve for assisting smooth flow of the material. Automatic weighing means is operatively connected to the flow control means to selectively regulate material flow according to bag weight whereby a plurality of bags may be filled to a uniform weight, and a bag seat means is arranged independent of the weighing means for urging the delivery of the bag from the apparatus. The dust in said chamber and at said filling means is recirculated back into the hopper.

A New Method for the Determination of Material Flow Stress Values under Metalworking Conditions.

Abstract: For the adequate mathematical understanding of metalworking processes and the theoretical prediction of deformation loads, there is a precise need for accurate knowledge of the basic flow stress behavior of the workpiece material under particular conditions of temperature and strain rate. This information can be obtained by means of tension, torsion, or compression testing, but because of major drawbacks with the first two methods, compression testing is most widely used.