Method of amber processing

FIELD: chemistry.

SUBSTANCE: invention relates to production of amber half-stock, primarily, of minor fractions and large-size amber articles and work pieces. Proposed method consists in loading amber stock in elastic shell made from waterproof material to be sealed and placed in hydro barometric chamber. The latter is filled with fluid. Elastic shell filled with amber stock is subjected to hydrostatic compression at high fluid pressure. Note here that temperature inside said chamber is kept not higher than 120°C during the entire period of hydrostatic effects.

EFFECT: production of large-size amber articles with normal physical, chemical, aesthetic and therapeutic qualities of natural monolithic amber, recovery of industrial wastes, cheap amber half-stock.

4 cl

 

The invention relates to a method of processing amber raw materials, mainly fine fractions, and obtaining large amber products and billets.

A method of processing amber (ed. mon. The USSR №1283106, publishing, 1987), including the amber heat treatment in an inert atmosphere of nitrogen at a temperature of 150-170°C with simultaneous longitudinal compression with a force of from 7 to 15 kg over 10-20 min followed by cooling with the conservation efforts of longitudinal compression.

The disadvantage of this method is the anisotropy of the resulting amber, due to the nature of pressure distribution for longitudinal compression of the loaded raw materials, as well as the destruction of the structure of amber (thermal decomposition), and a low degree of purification of amber from the dissolved products of thermal degradation of emitted during heating after reaching the temperature in the working space of 130°C.

A method of processing amber (ed. mon. The USSR №1039726, publishing, 1983), including loading it into the working chamber of the mold, sealing, heating of amber in a nitrogen atmosphere at 130-170°C and a pressure of 15-20·105PA aged 6-12 hours and then cooled.

The disadvantage of this method is the possible destruction of the structure of amber (thermal decomposition), and a low degree of purification of amber from the solution is the R in it products thermal decomposition released in the process of heating after reaching the temperature in the working space of 130°C, and the air in the volume of loaded mass of amber.

A known method for manufacturing large products from the fine fraction of natural amber (RF patent №2191704, publishing, 2002), providing preliminary selection of pieces of amber with particle size fraction ~10 mm, loading raw material into a heated mold, heating it in the molds without access of air to a temperature of not more than 140°C and pressing at a pressure not more than 100 MPa and then cooled under natural conditions.

The disadvantage of this method is the necessity of a rigorous selection of amber raw materials by color, shape and size, as well as the possible destruction of the structure of amber in the treatment process at a temperature of over 130°C.

A method of processing amber (patent RF №2173258, publishing, 1983), including the download amber raw material in the working chamber, sealing, heating the feedstock to a temperature of buying a plastic properties not lower than 130°C, the shutter speed and cooling. After sealing the loaded camera engage in multilateral compression of raw materials, filtration and removal of the products of thermal degradation of amber. Compression, filtering, and removal is carried out by evacuating the working chamber throughout technology the technological cycle of manufacture.

A method of processing amber (patent RF №2200093, publishing, 2003), including downloading the amber raw material in the working chamber of the mold, sealing, heating the feedstock to a temperature not lower than 130°C in terms of its overall compression and exposure at this temperature. The sealing of the working chamber is performed with the use of elastic membranes and conduct evacuation of the working chamber with the seal of raw materials through the impact of the elastic membrane, and after degassing produce additional sealing amber raw material pressing due to the impact on the elastic membrane with the outer side of the mold with compressed gas, while in the process of degassing carry out the removal of amber and the working chamber of the mold products of thermal degradation of amber, filtering and cooling the resulting product together with the working chamber.

The disadvantage of these methods is that in the process of amber is the destruction of its structure (thermal destruction).

A known method of manufacturing decorative items made of natural amber, including loading raw material into the matrix of a sealed mold, compressing the heated feedstock in a vacuum press-fit fixation of the molding cavity of the matrix while simultaneously dropping the pressure by prekrascheniem degassing and subsequent cooling of the mold (patent RF №2240925, publication 2004).

The disadvantage of this method is that during the processing of amber is the destruction of its structure. The known method does not allow to obtain a durable and high-quality products made of amber.

The aim of the present invention to provide a large-format (up to 10 kg) monolithic amber products or pieces of amber, mostly small fractions, preserving the physical, chemical, aesthetic and curative properties of natural amber cast, not subjected to thermal degradation, as well as increase the utilization of amber without the use of any synthetic or natural impurities, disposal of industrial wastes amber and using amber cheap raw materials.

As raw material is natural amber in various sizes and shapes, pre-cleaned from oxide film and brown.

The proposed method provides receiving large amber products or workpieces with high density, dielectric constant and translucency of amber, as the pressure of liquid loaded in the elastic shell amber raw material is subjected to a comprehensive compression and compaction, which ensures that in the absence of air isotropy properties of the products obtained around them about is him, eliminates the appearance of internal bubbles and micro-cracks inside the finished products.

The essence of the proposed technical solution is as follows.

In the process of pressing amber amber raw material is loaded into the elastic membrane made of waterproof material, which is sealed and placed in hydropatichesky the camera, then hydropatichesky chamber filled with fluid and act on the elastic membrane placed in her amber raw materials.

The impact carried out through a comprehensive hydrostatic compression at high pressure liquid during the entire period of time the impact on the elastic membrane placed in her amber raw material temperature inside gidropaticheskih camera support is not higher than 120°C.

Overall influence on the elastic membrane provide a pressure in the range of 300-2000 ATM.

Overall influence of hydrostatic pressure on the elastic membrane is carried out for a time from 1 to 11 hours.

Elastic shell is sealed by completely covering its surface with silicone.

The process of amber is as follows.

Pre-cleaned amber raw material is loaded into the elastic membrane made of waterproof material, such as rubber. Then the uke is annoy shell seal, for example, by completely covering its surface with a layer of silicone and placed in hydropatichesky the camera, while hydropatichesky camera can be pre-heated to the operating temperature range. After that hydropatichesky chamber filled with liquid, such as water, cover, serves working pressure and influence on the elastic membrane placed in her amber raw materials.

The impact is realized by means of hydrostatic compression at high fluid pressure in the range of 300-2000 psi for a time from 1 to 11 hours. During the entire period of time the impact on the elastic membrane placed in her amber raw material temperature inside gidropaticheskih camera support in a predetermined operating range from 70°C to 120°C.

Heating gidropaticheskih camera and maintain the desired operating temperature within it is performed with the use of electric heaters, and for the exact shutter speed operating temperature used thermocouple.

After a predetermined period of time, the pressure gidropaticheskih camera remove and cool the chamber to the ambient temperature. At the same time to speed up the cooling process can be used for more air or water cooling. However, cooling should not be too intense, because it can lead to fragility ready isdel who I am.

After cooling, open the camera and remove the elastic of her shell with the finished product. After that, the shell is cut and remove the finished product.

The application of the proposed method amber allows to obtain high-quality large-format product or preform from amber with preserved structure and, consequently, with unchanged physical, chemical, medicinal and aesthetic properties of natural monolithic natural amber, not subjected to thermal degradation.

The proposed method can improve the utilization of amber without the use of any synthetic or natural impurities, dispose industrial waste amber and use amber cheap raw materials.

1. The way amber, characterized by the fact that amber raw material is loaded into the elastic membrane made of waterproof material, which is sealed and placed in hydropatichesky the camera, then hydropatichesky chamber filled with fluid and act on the elastic membrane placed in her amber raw material through a comprehensive hydrostatic compression at high pressure liquid during the entire period of time the impact on the elastic membrane placed in her amber raw material temperature inside gidropaticheskih camera support is not higher than 120°C.

2. The method according to claim 1, characterized in that the elastic membrane is affected by pressure in the range of 300-2000 ATM.

3. The method according to claim 1, characterized in that the overall influence of hydrostatic pressure on the elastic membrane is carried out for a time from 1 to 11 p.m.

4. The method according to claim 1, characterized in that the elastic membrane is sealed by completely covering its surface with silicone.



 

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