Refractory material coated metal surfaces adapted for continuous molding of concrete blocks
OwnerLance A. Heitzinventor
Life of this patent
Estimating the term…
Abstract
A concrete block molding apparatus and component molding parts coated with a flame spray refractory material and binder composition. The coatings can be smoothed to provide a finished surface for the blocks as by polishing, pressure on the coated surface or preferably by a coating of a thermoset resin as a binder. A preferred thermoset resin includes polytetrafluoroethylene (PTFE) in the coating to improve slipperiness. The parts have a greatly increased life cycle and the apparatus has a much longer cycle time between changes of the parts.
Claims18
In an apparatus for continuous molding of concrete blocks of the kind having a frame, a vibratable open bottom mold supported on and in contact with the frame, a pallet support beneath the mold, a pallet carried on the pallet support, motion transmission means connected to the pallet support for raising the pallet toward the mold a distance sufficient to seat the pallet against the bottom of the mold, vibration means for vibrating the mold and a stripper head for removing the block from the mold by pushing the block towards the pallet, the improvement which comprises providing metal wear surfaces of at least some of the parts of the apparatus which come into contact with the blocks or which come into contact with each other during the molding with a coating, which comprises a flame sprayed metal refractory material admixed with a binder and covered with a polymer.
In a concrete block molding apparatus of the kind having a frame, a vibratable open bottom mold supported on and in contact with the frame, a pallet support beneath the mold, a pallet carried on the pallet support, motion transmission means connected to the pallet support for raising the pallet toward the mold a distance sufficient to seat the pallet against the bottom of the mold, vibration means for vibrating the mold and a stripper head for removing the block from the mold by pushing the block towards the pallet, the improvement which comprises:
- providing metal wear surfaces of the mold and stripper head which come in contact with the block and which come into contact with other parts of the apparatus during the molding with a coating which comprises a flame sprayed metal refractory material and a binder covered with a polymer wherein the refractory material coating has a thickness between about 0.05 and 30 mils.
Dependencies are inferred from the claim text.