Apparatus for making plaster board
AssigneeSaint-Gobain Industries
InventorsAdrien Delcoigne, Jacques Lanneau
Life of this patent
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Abstract
The present invention is concerned with manufacturing board from a fluid evolutive product, such as a plaster and water mixture. The process comprises pouring upon a conveyor a fluid evolutive product, such as a plaster and water mixture, contained in storage above the conveyor, through a transverse, parallel slit into which the product is introduced in continuous process through a number of nozzles which discharge into the storage product mass. A reinforcement may be introduced into the poured product. The invention offers as well mechanism for the implementation of the process and products manufactured by the process. Typically the invention is applied to plaster board manufacturing.
Claims22
A device for making board from a fluid evolutive product including a moving conveyor, a reservoir having an open bottom above the conveyor and having a downstream wall which, with the conveyor, forms a transverse slit for the movement of fluid evolutive product away from the reservoir, means for moving the conveyor to pass the product from the reservoir through the slit to form the board, a plurality of product supply tubes extending through the downstream wall for discharging the fluid product into the reservoir, means including horizontal spaced nozzles on said supply tubes for continuously introducing streams of fresh fluid evolutive product substantially horizontally into the reservoir, and means for discharging the product through the nozzles into the reservoir with such force as to eliminate dead spots and prevent premature hardening of said product.
Apparatus for the continuous making of plasterboard comprising
- means for pouring a supply of plaster powder at a constant rate into a mixing tank,
- means for pouring a quantity of water into the mixing tank at a constant rate,
- means for directing a portion of the water along the walls of the tank to flush it and keep it clean,
- means for directing a portion of the water at the shaft of a turbine to flush it and keep it clean,
- means including the impeller of the turbine for mixing the plaster powder and water and throwing the mixture outwardly to create a single vortex about a vertical center line,
- means for discharging the mixture from the bottom of the tank into an ejection device,
- means for discharging the mixture from the bottom of the ejection device in a tangential manner,
- means for passing the mixture into a valve having an elastic sleeve forming an orifice,
- means for sensing the level of the mixture in the tank by weighing the tank and mixture,
- means for controlling the size of the valve orifice in accordance with the tank mixture level in order to maintain that level and the time of the mixture in the tank,
- means for vibrating the valve sleeve to prevent deposit of mixture thereon,
- means for passing the mixture to a distributor,
- means for distributing the mixture from the distributor to a number of nozzles,
- means for ejecting the mixture through the nozzles into a trough of the mixture and spreading the mixture transversely,
- means for creating a number of horizontal vortices to spread the mixture laterally in the trough and to prevent any dead spots and deposit of the mixture,
- means for moving the mixture horizontally on a moving conveyor through a slit to form a flat sheet,
- means for reinforcing the mixture by adding reinforcement material to the mixture before it sets, and
- means for allowing the mixture to set to form plaster board.
Apparatus for making a board from a fluid evolutive product including
- means for pouring said product into a reservoir above a conveyor moving at a uniform speed through a slit transverse to the conveyor so that the board is formed between the conveyor and the downstream wall of the reservoir, including
- means for introducing streams of fresh fluid evolutive product continuously into the reservoir through spaced nozzles discharging into the product in the reservoir,
- said means introducing said streams horizontally and with such force as to create agitation along closed flow lines and to eliminate dead spots in the product in the reservoir.
Dependencies are inferred from the claim text.