| Item | Technical Indicators |
| Voltage | 380V 50HZ |
| Designed Power | 75KW |
| Maximum Design Temperature | 1200℃ |
| Furnace Chamber Dimensions | Diameter × Height: 1000×800mm |
| Control Range | 300 to 1200℃ |
| Temperature Control | One control point at the upper part, one at the middle part, one at the lower part (the furnace door control shares a set of control system with the degreasing furnace) |
| Temperature Measuring Element | Thermocouple (Type K), measuring range 0-1320℃ |
| Heating Elements | Kanthal resistance wires |
| Installation Position of Heating Elements | Evenly distributed around the furnace chamber |
| Air Inlets | 6 air inlets for uniform air intake (distributed at the lower part of the 四周) |
| Exhaust Ports | Equipped with 1 manual exhaust valve and 1 electric exhaust valve, both made of 304 stainless steel |
| Temperature Control Precision | ±1℃ (integrated circuit control, no overshoot) |
| Furnace Temperature Uniformity | ±3℃ |
| Water Cooling | Water-cooled parts of the equipment: furnace top and furnace mouth (water source provided by customer) |
| Sealing | The flange is provided with a sealing groove, using a "Y" -type ring for vacuum sealing with water cooling; water inlet and outlet interfaces are both on the furnace body. |
| Atmosphere | The electric furnace can be fed with nitrogen, hydrogen, carbon monoxide, oxygen, etc. |
| Vacuum Degree | ≤10pa (pressure rise rate ≤5pa/h, pressure holding for 24h) (measured after empty furnace degassing) |
| Vacuum Gauge | 1 set of resistance vacuum gauge |
| Vacuum Valve + Pipes | The valve adopts a high-vacuum gate valve (ISO100); the pipe adopts DN100, with an additional ISO vacuum bellows (length 200mm) |
| Vacuum Pump | Two-stage rotary vane mechanical pump + roots pump (provided by customer) |
| Pressure | Digital positive/negative pressure gauge, capable of controlling micro-positive pressure sintering process |
| Flowmeter | Mass flowmeter (0-30L) |
| Touchscreen | 10-inch centralized control |
| PLC | Siemens SR20 |
| Automatic Control | One-click start: controls the degreasing furnace door to rise → degreasing furnace heating according to the set program → degreasing furnace air intake → cooling to the set temperature → furnace door automatically descending → furnace door automatically moving to the light firing furnace → furnace door automatically rising → light firing furnace vacuum pumping → atmosphere introduction (furnace cleaning times can be set) → light firing furnace heating until the set program ends. |
| All the above controls are centrally managed by PLC and touchscreen. |
| Furnace Door Movement | The left-right movement of the furnace door adopts two front-rear linear guides of CNC machine tools + four linear sliders + ball screws + variable frequency reduction motor, with adjustable moving speed. The frequency converter is set with soft start and soft stop to effectively ensure stable movement of the furnace door. |
| Furnace Door Lifting | The furnace door lifting adopts four cylindrical linear guides installed on the left and right sides, with one extended linear bearing per guide + two trapezoidal screws + variable frequency reduction motor, with adjustable lifting speed. The frequency converter is set with soft start and soft stop to effectively ensure stable lifting of the furnace door. The bottom of the furnace door is equipped with 4 pressure springs, which can freely align when raised to the top. |
| Loading Platform | 1 |
| Loading Platform Capacity | 500kg |
| Loading Platform In/Out | In/out movement uses a stepless reduction motor with lead screw and guide, speed adjustable; shares one loading platform with the light firing furnace. |
| Loading Platform Lifting | Electric double-screw lifting |
| Cooperation Between Furnace Mouth and Loading Platform Refractories | The furnace mouth and loading platform refractories adopt three-layer stepped cross-sealing, with angles on both upper and lower parts of the refractories. The opening angle of the loading platform increases, and gradually decreases as the platform closes. |
| Heating Rate | Freely adjustable, with a range of 15℃/min (fastest) to 1℃/h (slowest) |
| Furnace Body | Processed by CNC machine tools, with processes including polishing, grinding, pickling, phosphating, plastic powder spraying, and high-temperature baking. It features a novel and attractive appearance, with advantages such as oxidation resistance, acid and alkali resistance, corrosion resistance, high-temperature resistance, and easy cleaning. |
| Protection System | Adopts an integrated module control unit with accurate control precision, designed with dual-loop control and dual-loop protection. |
| Protection Functions | Features overshoot, undershoot, thermocouple break, phase loss, overvoltage, overcurrent, overtemperature, current feedback, and soft start protection. |
| Control Mode | Uses closed-loop thyristor module trigger control (phase-shift trigger or zero-crossing trigger mode). Output voltage, current, or power is continuously adjustable with constant voltage, current, or power characteristics. The current loop is the inner loop and the voltage loop is the outer loop. When the load is suddenly applied or exceeds the current limit, the output current of the voltage regulator is limited within the rated range to ensure normal operation of the output and regulator. The voltage loop also participates in regulation to maintain stable output current and voltage within the rated range, thus protecting heating elements from excessive current/voltage impact and ensuring safe, reliable control and precision. |
| Refractory Materials | The furnace lining is made of vacuum-formed high-purity alumina lightweight materials. Positions prone to collision during material handling and load-bearing positions (furnace mouth, furnace bottom) use lightweight hollow spherical alumina plates, featuring high operating temperature, low heat storage, resistance to rapid heating/cooling, and good thermal insulation performance (energy-saving effect is over 80% compared to old-fashioned electric furnaces). |
| Insulation Materials | Three-layer insulation: aluminosilicate fiberboard, alumina fiberboard, and alumina (polycrystalline) fiberboard, with an energy-saving effect over 80% compared to old-fashioned electric furnaces. |
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