1200°C vertical vacuum atmosphere sintering furnace with SiC heating elements, mechanical pump + diffusion pump vacuum system. Adopts Siemens S7-200 PLC & 7-inch touchscreen with 50-segment program control
1.AJ-VSF 1200℃ High-Temperature Vertical Vacuum Atmosphere Sintering Furnace is mainly used for vacuum sintering treatment of alloy materials or non-metallic materials.
The complete equipment consists of a vertical main unit (single chamber), vacuum system, gas charging system, water cooling system, electrical control system, etc.
2. Main Technical Parameters
| Specification | Parameter |
|---|---|
| Furnace chamber size | 500×500×500 mm |
| Vacuum level | 6.67×10⁻³ Pa |
| Pressure rise rate (empty furnace, cold state) | ≤0.66 Pa/h (calculated over 24-hour pressure holding) |
| Pumping rate (at 1×10⁻³ Pa, room temperature, empty furnace, with main valve open, timed) | ≤120 min |
| Maximum design temperature | 1200℃ |
| Long-term service temperature | 1150℃ |
| Heating rate | ≤10℃/min (non-linear) |
| Temperature uniformity | ≤±5℃ (nine-point test at 1200℃, no load) |
| Temperature control accuracy | ±1℃ |
| Atmosphere gases available | Nitrogen, argon, carbon monoxide, oxygen, hydrogen, etc. |
| Oxygen analyzer | Real-time monitoring of residual oxygen content in the furnace to ensure a stable low-oxygen environment, thereby avoiding material oxidation and performance degradation |
3.1 Vacuum Furnace Main Unit
| Item | Content |
|---|---|
| Structure | Vertical single-chamber structure, consisting of furnace body, furnace door, furnace frame, heating chamber, etc. |
| Furnace body & door structure | Double-walled water-cooled structure; inner wall welded carbon steel, outer layer protective shell |
| Furnace body machining process | CNC machined, finished through polishing, grinding, acid pickling, phosphating, powder coating, high-temperature baking, etc., two-tone color scheme |
| Performance advantages | Oxidation resistance, acid/alkali resistance, corrosion resistance, high-temperature resistance, easy to clean |
| Furnace chamber steel plate | Thickness 6–20 mm, double-sided welded, withstands positive pressure up to 0.1 MPa |
| Furnace body outer shell temperature | ≤45℃ during long-term operation |
| Furnace door structure | Side-opening, pneumatic locking structure |
Interface Configuration:
| Location | Interface |
|---|---|
| Top cover center | 1 × ½" NPT female port (spare) |
| Furnace door center | 1 × ½" NPT female port (spare) |
| Upper part of furnace body | 2 × ½" NPT female ports, for inert gas inlet |
| Top and bottom of heating chamber | 1 × ½" NPT female port each, for thermocouple installation |
3.1.2 Heating Chamber, Heating Elements and Insulation Elements
| Item | Content |
|---|---|
| Furnace lining structure | Made of vacuum-formed alumina lightweight material |
| Load-bearing/impact-prone positions | Furnace mouth, furnace bottom, etc. use lightweight hollow-sphere alumina boards |
| Lining features | High service temperature, low heat storage, resistance to rapid heating/cooling, no cracking, no slagging, good insulation performance |
| Insulation material (three layers) | Inner: 99 lightweight alumina material; Middle: alumina fiber board; Outer: ceramic fiber board |
| Heating elements | Silicon carbide rods |
3.2 Vacuum System and Vacuum Gauge
| Item | Content |
|---|---|
| Composition | Mechanical pump, diffusion pump, pneumatic baffle valve, connectors, gauge tubes and auxiliary devices |
| Configuration | One mechanical pump, one diffusion pump |
| Vacuum gauge | 1 digital resistance vacuum gauge |
| Operation mode | Automatic programs can be set via touch screen for automatic furnace purging, gas switching, vacuum pumping, etc. |
3.3 Water Cooling System
| Item | Content |
|---|---|
| Composition | Stainless steel stop valve, water inlet, drain tank, water pressure electric contact pressure gauge, etc. |
| Supporting equipment | One chiller supplied with the unit |
| Protection | Drain pipe equipped with overpressure protection device |
| Water outage protection | Sound and light alarm and interlock function; automatic switch to emergency cooling water |
3.4 Gas Charging System
| Item | Content |
|---|---|
| Composition | Gas charging stop valve, gas manifold, solenoid valve, vacuum electric contact pressure gauge, etc. |
| Function | Adjustable and controllable furnace vacuum level during heating |
| Flow control | Pipeline equipped with mass flow meter for manual measurement and control of gas flow |
3.5 Pneumatic System
| Item | Content |
|---|---|
| Composition | Pneumatic valves, solenoid valves, oil-water separator, oil mist lubricator, pressure gauge, etc. |
| Usage | User only needs to connect the pneumatic interface to the air source |
3.6 Electrical Control System
| Item | Content |
|---|---|
| Composition | Two parts: thyristor voltage regulator, intelligent instrument (temperature program control) and PLC (mechanical action control) |
| Functions | Programmable temperature control; temperature chart recording; vacuum chart recording; alarm and interlock protection for water pressure, over-temperature, over-current, etc.; automatic/manual operation switching |
3.6.1 Temperature Control Instrument
| Item | Content |
|---|---|
| Brand | Yudian temperature controller |
| Control accuracy | ±1℃ |
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