Method and apparatus for manufacturing lining plates and products thereof

Claim 1

A method of manufacturing covering plates having a base of hard materials, granulated and pulverulent matter, respectively, agglomerated with synthetic resins, comprising the following successive operations coating a conveyor belt with a stripping agent, uniformly depositing on the converyor belt a fine layer of binding agent of uniform thickness of accelerated catalyzed synthetic resin, containing hard pulverulent matter from 10 to 300 microns exclusively, and dyes, regularly and in graded manner by a binding agent distributor, sprinkling dried and clean granules of a size from 1.5 mm to 10 mm exclusively, mixed in favorable proportions, on the layer of binding agent, the sprinkling being effected by a doser distributor spreader, coating the granules prior to the sprinkling step with a wetting agent methyl methacrylate, the preceding operations being conducted by varying the speed of the belt, the thickness of the layer of binding agent, its fluidity, and the quantity of granules introduced into the binding agent so as to obtain an aggregate to binding agent weight ratio as high as possible, vibrating the following section of the conveyor belt, effecting a sedimentation of the granules until the level of the binding agent has risen above said granules, thereby effecting a complete integration and homogeneous distribution of the granules in the binding agent, covering the resulting strip with a base layer of granules which adhere on the upper surface of the strip, vibro-compressing the resulting strip with rollers, passing the resulting strip into a polymerization furnace, recovering excess granules by suction from the base layer of the resulting layer, removing the strip from the conveyor belt, guillotining and cutting the removed strip into plates of large dimensions, coarse polishing the faces of the plates on a grindstone, fine finishing the faces of the plates, sawing the plates to desired sizes, and passing the plates into a final furnace.

Claim 2

A method of manufacturing covering plates having a base of hard materials, granulated and pulverulent matter, respectively, agglomerated with synthetic resins, comprising the following successive operations coating a conveyor belt with a stripping agent, uniformly depositing on the converyor belt a fine layer of binding agent of uniform thickness of accelerated catalyzed synthetic resin, containing hard pulverulent matter from 10 to 300 microns exclusively, and dyes, regularly and in graded manner by a binding agent distributor, sprinkling dried and clean granules of a size from 1.5 mm to 10 mm exclusively, mixed in favorable proportions, on the layer of binding agent, the sprinkling being effected by a doser distributor spreader, coating the granules prior to the sprinkling step with a wetting agent methyl methacrylate, the preceding operations being conducted by varying the speed of the belt, the thickness of the layer of binding agent, its fluidity, and the quantity of granules introduced into the binding agent so as to obtain an aggregate to binding agent weight ratio as high as possible, vibrating the following section of the conveyor belt, effecting a sedimentation of the granules until the level of the binding agent has risen above said granules, thereby effecting a complete integration and homogeneous distribution of the granules in the binding agent, covering the resulting strip with a base layer of granules which adhere on the upper surface of the strip, vibro-compressing the resulting strip with rollers, passing the resulting strip into a polymerization furnace, recovering excess granules by suction from the base layer of the resulting layer, removing the strip from the conveyor belt, guillotining and cutting the removed strip into plates of large dimensions, coarse polishing the faces of the plates on a grindstone, fine finishing the faces of the plates, sawing the plates to desired sizes, and passing the plates into a final furnace.