DE594101C - Process for producing large disks from synthetic masses - Google Patents

Description

Process for producing large disks from synthetic masses In the main patent 584398 there is a process for producing large disks from synthetic masses from condensation products of formaldehyde, its polymers and ureas. Thioureas or mixtures thereof are described by pouring them into molds and then drying the moldings, in which, after casting, the solidified plane-parallel moldings are subjected to a specially controlled drying process.

It has now been shown that the panes dry faster at the edge than in the middle. In order to obtain more evenly dried slices, according to the invention covered the end faces of the discs, creating an equally fast Drying of the edge and middle parts is brought about. Designed to be particularly simple the process, if one uses fast-drying varnishes to - cover the front sides, easily melting masses and the like are used. Depending on the type and strength of the used This coating can also overlap over the edges of the end faces in order to achieve the desired to ensure the same rapid drying of the edge and middle parts. The cover the end faces can of course also be preformed by folding over a permanently attached Body take place, for example by a rubber band, by spring-mounted wooden strips and the like. Slices dried in this way show uniformity at all points Texture so that stresses which can lead to cracking are avoided will.

Claims (1)

PATENT CLAIM: Process for the production of large disks from synthetic masses according to patent 584 398, characterized in that for the same rapid drying the Edge and middle parts cover the front sides of the panes in any way, for example before or during drying with coatings made of quick-drying Paints, easily melting compounds and the like.