For processing the aluminum waste to aluminum alloys that are in conformity with the standard
After the delivery we perform incoming control of the received raw materials and waste and then the aluminum waste is sorted as follows:
- Aluminum waste of the vehicle industry (with the average per cent aluminum contents being 86% ±1%);
- Aluminum waste derived from profiles for piece-parts (with the average per cent aluminum contents being 98,5% ±0,2%);
- Aluminum waste of household origin (with the average per cent aluminum contents being 99% ±0,2%).
If necessary, the volumetric details are being cut or pressed in order to achieve the optimal dimensions that are suitable for putting in the furnaces in order to manufacture the finished product. The sorted aluminum waste is distributed in concrete cells to this end in view of its types until its thorough processing. The aluminum waste processing takes places in flame-reflecting furnaces in conformity with the technological regulations and requirements.
Since the alloys being manufactured by “Stam Trading” JSC are of lower contents of impurities, the majority of the aluminum material being used has high per cent aluminum contents /on the average above 95 %/.
After the aluminum material melts down, the technologist performs control spectral analysis that demonstrates the current chemical contents. All analyses are being performed in the company laboratory with spectral analysis device.
The manufacturing process takes places according to the work instructions via the maintenance of the necessary technological regimes and regular sampling for monitoring the quality of the manufactured aluminum alloys.
The company performs interim and final control of the manufactured aluminum alloys and aluminum filtering for non-metal impurities at client’s request.
The final control is performed by the technologist and sampling is done to this end in order to test these samples once again at the spectrometer. The order is finalized if the foundry casting work is in conformity with the regulations defined by the client.
For details founding
The material blocks together with the press residues in a ratio of 70/30 are being melted in gas or electric resistance furnace up to founding temperature from 680 to 720 degrees depending on the detail configuration. Sampling is performed from the furnace and the spectral analysis is performed in order to define the conformity with the set values in the documentation for the particular detail.
The prepared foundry machine is being connected to the heating device for tempering from 180 to 240 degrees of the instrumental equipments. After reaching the set temperature, we proceed to the actual founding process.
The instrument is coated with water-soluble daub in the ratio 1 to 2/100 l in order to form a layer between the warm metal and the instrument for detail non-sticking and extending the useful life of the die mould.
The metal is being poured in machine’s chamber as it is dosed for the particular detail.
During the first phase the die sleeve and the feeding system of the detail up to its entrances towards it.
During the second phase we perform high speed mould filling.
During the third phase the casting is being thickened /additionally pressed/ in order to eliminate the bubbles and pores inside it.
This is followed by keeping the detail inside the casting box for crystallization and opening the instrument, activating the dumping system and taking the casting out.
After getting the high quality casting, the latter is checked with a visual inspection via specialized equipment.
Each detail is finished with a measurement protocol.
The details are being arranged in metal pallets.
Eliminating the pouring system after manual breaking, cutting metal bandsaw, in the case of detail die the latter is being eliminated at a hydraulic press;
- If necessary, the details are being grinded at belt grinder with suitable grain size of the sandpaper;
- If necessary, the details are being manually cleaned with a pneumatic file;
- Drilling openings and carvings of pneumatic machines to this end for making several openings simultaneously;
- Some of the details are being subjected to blast cleaning or slip grinding.
The details are being controlled throughout the technology process.
The finished details are packed according to client’s specification.
Scrap buying out is in conformity with the currently effective regulations in the country. The quality features of the submitted waste are being monitored as soon as they enter the company.
The scrap processing operations performed by “Stam Trading” JSC are the following:
- Press baling;
- Waste thickening until reaching the dimensions of 30-35 cm;
The company offers vehicles of its own and it provides the industrial companies with waste collection containers at their territory.