GMI - Chemical Tempering - S-TPG-275

Automatic oven for chemical tempering of glasses maximum dimensions 2600 x 1500 mm 1 Model: CT925 (Special) 2 Components: · Stainless steel tank with electrical heating system . Moving pre-heating dome combined with lifting rack from the salt . Loading glass rack with railway inside the pre-heating chamber . Outside mechanism and electrical parts · Bulkhead for covering the tank . N. 1 Stainless steel rack to hold glasses · Switch board + power board . H 1mt perimetrical security netting of the entire oven with gate and electro-lock 3 Mains data - Heated base of the oven to contain the tank with the salt and reach a temperature of 400/500°C - Outside temperature: max. 40/60°C - Stainless steel tank Aisi 321, thickness 8mm (with radiographed welding) - Inside dimensions of the tank: 2700x900x1800mm - Tank capacity: about 7000/8000 kg of salt - Electrical power of the bottom part of the oven: 90 kW - Electrical power of the pre-heating dome: 48 kW - Intake hole inside the post-cooling dome with motorized closure - Motorized linear translation system of the dome from the base of the oven to the loading/unloading position - Motorized bulkhead to close the tank with the salt - Motorized lifting system of the rack with glasses, by means of endless screws and possibility to change the speed - Control board complete with all controls and safety devices necessary for a complete managing of the equipment in automatic - Stainless steel rack Aisi 316, suitable to hold glasses to temper (only external frame) 4 Technical specifications of the components 4.1 Heated base of the oven with the tank · Heating elements are placed in all sides (on two levels) and on the bottom of tank . Electrical power: 3 x 400V, 50/60Hz 138KW · All heating elements can be easily reached and connected from the outside · Temperature uniformity of the bath: +/- 3/5°C · Temperature sensors placed in two different levels. Each level has four sensors included in two thermocouples · Temperature control of heating chamber in two areas with two thermocouples for a uniform heating · Temperature alarm MIN/MAX set on 30/40°C · Tank welding controlled at X radius to assure the maximum safety of salt bath · Construction of the salt bath tank made in stainless steel AISI 321, thickness 8mm · Tank with salt always covered during moving of pre-heating chamber · Maximum temperature of the bath: 500 °C 4.2 Pre-heating chamber · Pre-heating dome without door · External rack loading system with controlled variable speed · Automatic system of pre-heating chamber translation from loading area to salt bath · Pre-heating dome with inside heating · Temperature control inside the chamber · Mechanical and electrical external system for rack lifting · Two windows to inspect inside the chamber on each side 4.3 Rack to hold glasses - Maximum dimension of glass: length: 260 [cm] height: 150 [cm] depth: 90 [cm] - Suitable for a maximum total capacity of 1500Kg - Wire netting on the bottom of the rack and 30cm on the sides to collect pieces of glass in case of breaking · Construction in stainless steel Aisi 316 · Removable bars on the front for a better loading and unloading of the glasses · Rack realized only with steel section and no tubular 4. 4 Control device - Possibility of manual and automatic working - English inscriptions 4. 5 Specifications of control device - Four thermoregulators to control heating chamber and salt temperature - Temperature recorder 3 retraces - Electronic panel for the equipment running - Functions controlled by PLC - Complete with emergency button - Complete with selector with key for manual opening and closure of the bulkhead to close the tank for inspection 4.7 Documentation 4.7.1 General manual including following documents: . working general description · technical data . instructions for installation · detailed description for the automatic use · detailed description for the manual use · detailed description in case of alarm and emergency · diagram of the electric circuit · maintenance manual · list of spare parts suggested to keep in stock 4.7.2 Certificate of conformity and quality · CE certificate of conformity · Certificate of material for rack to hold glasses · Certificate of material for tank · Test certificate to X radius of tank welding . Certificate of salt analysis (if supplied) 5 Salt composition necessary for processing - 100% Potassium Nitrate - Potassium nitrate pure for analysis RPE - Quantity necessary to fill up the tank, about 8000 Kg 6 Installation - Installation and starting up of the equipment - Instruction for use and maintenance - Time necessary: six days 2/3 technicians