DE206563C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- JVI 206563 CLASS 806th GROUP

HERMANN RENTZSCH in MEISZEN i. S.

In the manufacture of hollow bodies based on the centrifugal process plastic mass, e.g. B. cement paste o. The like. For the greater solidification of the work piece Fibers of organic or inorganic origin or other additives are added are, as is well known, within the rotating form one after the other occurs specific gravity of the individual substances segregating in layers Deposition of these individual substances, if no countermeasures are taken. to be hit.

Such antidotes are known according to patent specification 200729, class 80b:

. i. that one uses fibers or other additives that are essential by nature have the same specific weight as the plastic mass to be thrown;

2. that the fiber or other additive, which is lighter in itself, can be soaked in water or

3. by soaking with weighting agents artificially to the appropriate specific weight brings.

Of the latter two remedies, the one listed under 2. is actually the simplest in practice feasible, while the one mentioned under 3 is more cumbersome, but also has a greater and more lasting effect.

. According to the present method, the success of the simpler means is now to be increased in the following way:

The fiber or other 40 that has been sufficiently prepared on Koller Gang, Holländer and the like

Additive (e.g. asbestos, slag wool, slag sand, etc.) is not only found in water soaked, but rather boiled or steamed in water. Then he is with the plastic mass (e.g. cement paste) well mixed, whereupon this mixture soon put into the centrifugal form and there in is processed in a known manner.

This process offers a twofold advantage in terms of the fabrication process. Because at first the material treated in this way becomes faster and more perfect more open-minded than the one just soaked in cold water, and on the other hand he takes hot treated fabric that is more completely broken down into its individual fibers or particles significantly more water; he complains about 20 percent more than the one put on in cold water and so comes the respective specific weight of the plastic mass and sufficient for practice closer.

Conversely, it can also happen that the material processed into a plastic mass is specifically lighter than the additive. . In this case, the former would then apply to the way to complain.

This artificially created, as possible equality of the specific weights of those to be thrown In production, individual substances are only relevant until the mixture of substances comes under pressure in the mold by the centrifugal force. Because here is that Excess water is squeezed out again and the mass mixture around this is relieved, on the other hand is the mass mixture now

Claims (1)

mechanically fixed by the centrifugal pressure and thus prevented from segregation. Boiling or steaming the lighter additive will make it faster and faster more completely open-minded, and at the same time the inappropriate segregation of the Mass is a far more effective antidote due to the layered deposition of its individual substances ίο advised than by mere soaking in cold Water. Sponsors τ-An SPR υ c η:
Method of counteracting the segregation that occurs as a result of the different specific gravity when plastic mass interspersed with fiber or other additives is thrown in a circulating form, characterized in that the lighter constituent of the mass before centrifuging with hot, preferably boiling water or treated with steam.