DE228268C - - Google Patents

Description

IMPERIAL

PATENT OFFICE

For the production of fine furniture, musical instruments, physical apparatus, parquet floors etc., depending on the type of wood, many years (4, 6 and more) are required in the air

.5 dried wood, which as a result of the capital stipulated so long, the large space requirement for storage, fire risk, management costs, etc. becomes very expensive. No wonder, that one strove in many ways to have freshly felled wood in the shortest possible time for everyone To make purposes ready for processing. I.a. one dipped the wood in mostly far above ioo ° heated, water-immiscible liquids for a long time. Yes, even liquid made metals and metal alloys have been suggested as baths therefor. Here in most types of wood as a result of the often explosive phenomena Sudden steam formation in the pores of the wood even when air-drying is only under Under favorable circumstances, partially avoidable tearing is so much favored that one such Do not use processes for better uses of the wood or for valuable wood can. Others looked for individual components of the fresh through various solvents Remove wood one at a time, creating, if any, suitable solvents would have been used, a very cumbersome and expensive process would have resulted, which certainly does not leave the natural, valuable properties of wood unaffected would have. A similar but more rational process is based on the use of alcohol, optionally mixed with a volatile hydrocarbon to remove the moisture pulling out the cells, then the alcohol that has replaced them, and e.g. B. the gasoline, expelled from the cells and pores of the wood by heating. That by it a number of important components have been removed from the wood, is in the the patent in question is expressly cited; there is therefore no need to discuss whether the natural properties of the wood as with that of the air-dried remain. Attention is drawn to this procedure because it is the only one in which has become known in the literature, this is in accordance with that described below The aim of the process is to remove the ripening agent from the wood, while the other processes result in either displacing the water with an impregnating agent, or to make it evaporate by heating.

The present process aims and achieves freshly felled wood under complete Preservation of the natural properties so valuable for its extensive areas of use in a few days the well-aged, air-dried wood to all of it To make possible uses completely equivalent.

It consists in the fact that in the wood impregnation vessels simulated apparatus

th, which are provided with a steam jacket, which brings in the freshly cut wood, the vessel and then fill it with a bath liquid until the wood is completely covered with it is covered. By heating the steam jacket, the liquid is brought in gradually to a temperature that is suitable for gradually expelling the water in vapor form and the protein bodies for curdling

ίο to bring. When finally out of the apparatus If no more vapors escape, the bath fluid will be used in some suitable way removed from the vessels as completely as possible. The final temperature at which no more vapors escape, depends on the type of wood used, and it was found that, for example, for walnut and some similar woods, the temperature of the Bath with 120 to 125 ° C. not exceeded if you don't want to compromise the quality of the wood. In certain circumstances the used bath liquid can go through a cooler, through which it is brought to the initial temperature is brought back to be pressed straight into a second maturation kettle, etc., to the liquid proper to take advantage of.

Substances that do not mix with water are recommended as bath fluids and have a boiling point considerably higher than this, and those with water vapors are as little volatile as possible, for example pure paraffin for fine woods, with less fine tar distillates also more or less colored, those at 50 to 60 ° are easily liquid, and without decomposition and volatilization, the one required for the respective wood Withstand temperature. With colorless paraffin z. B. you have it in your hand, in it soluble dyes or dye formers up to to introduce into the interior of the pores of the wood and the same desired color nuances of great depth and perfect penetration.

In order to remove the bath fluid from the wood again, the wood is treated with an appropriate dissolving liquid for the bath substance used Paraffin, which was chosen as an example of such, i.e. carbon disulfide, benzene, carbon tetrachloride or any other suitable solvent in several series connected Maturation kettles according to the counter-current principle until the solvent with paraffin is saturated. Did you have a dye former in the Wood is introduced, so you can use the appropriately chosen solvent the appropriate Introduce dye developer in order to only add a dye inside the wood fiber to develop. In this way, two operations are combined in one process: maturation and the coloring of the wood.

The second measure of the method effects one depending on the processing specification Extraction of the bath fluid taken to a greater or lesser extent. For some purposes, e.g. B. in the case of wood of greater thickness, it does no harm - it may even be useful -, if some of the bath fluid remains in the core. In the case of wood veneers, there must be After gluing and polishing, paraffin, grease, etc., must be well removed.

Wood treated in this way can no longer crack, wood pests are destroyed, the pollution during storage and the loss of material are avoided. In addition to the speed of the process, there would also be the To emphasize the extraordinary security with which worked compared to the air drying can be, since in the latter case the weather conditions, the wind direction, etc. the same piece alternately uneven drying and thus tearing and warping of the Cause wood.

If construction timber is treated in this way, dry rot is ruled out once and for all. For this material one will use the raw paraffin or the tar oils and little or not remove the desiccant at all, especially on timber that is exposed to the elements is or is intended to serve chemical purposes.

After the extraction has been carried out far enough according to the intended use of the wood is, the extractant is known under Precautionary measures pressed and, if necessary, the remainder remaining in the wood into a condenser with the help of a warm gas stream driven.

The paraffin etc. can be used again and again, as can the solvent, if it is cleaned again from time to time in a known manner.

Claims (1)

Patent claim: Process for rapid ripening of the wood, characterized in that it is fresh Sawn wood in suitable containers first a bath of water-repellent or not mixing with it, if necessary liquid exposed to made or molten substance with a correspondingly lower initial temperature introduced, then gradually warmed up and for so long at the temperature suitable for the type of wood in question is held until no more water vapors and other vapors arise from the same. soft, then somehow separates the bath liquid from the wood and the wood pores remaining portion of the bath fluid by extraction with a suitable Solvent more or less removed again, to which a dye may be added can be, if this was not already added in ■ the bath liquid, and it is not preferred to produce dye by dividing the dye former and developer on bath and solvent zuiMiren. tffis