Model

SPS-2T-30-mini

Principle

SPS technology applies ON-OFF DC pulses generated by a special power control unit to the powder sample. In addition to the usual sintering promotion effects of electrical discharge machining (discharge impact pressure and Joule heating), it also effectively utilizes the spark discharge phenomenon (instantaneous high-temperature plasma) between powder particles at the initial stage of the pulse discharge to promote sintering, achieving rapid densification through an instantaneous high-temperature field.

Advantages

1. The upper and lower punches are equipped with thermocouples for temperature detection. If any abnormality occurs, the user will immediately observe it and can shut down the equipment to prevent damage.
2. The water cooling system has water temperature and water pressure monitoring. In case of abnormality, an alarm is triggered and heating is automatically cut off.
3. Equipped with an explosion protection system. When the pressure inside the chamber exceeds the set value, an alarm is triggered and heating is cut off.
4. Provides over-temperature, over-pressure, over-current, under-voltage, broken thermocouple protection and indication.
5. Equipped with an infrared pyrometer on the top for more accurate temperature measurement.

Power

31 KW (Power supply 30 KW + Mechanical pump 0.55 KW + others)

Punch Diameter

50 mm

Chamber Dimensions

160 × 200 mm (W × H)

Overall Dimensions

80 × 105 × 205 cm

Net Weight

250 kg

Power Supply Voltage

Three-phase, 380V

Pulse Power Supply

(Image reference)
High-stability pulse output: pulse train period and conduction width are uniform, no waveform distortion or phase shift, indicating precise power control logic and long-term stable output of set current.
Excellent synchronization: load current (yellow channel) and voltage (purple channel) signals are fully phase-synchronized with negligible response delay, ensuring simultaneous Joule heating and plasma effects during sintering.
High-frequency carrier characteristics: carrier frequency stable at approx. 30.86 kHz, steep current rise edge, quickly forming uniform discharge paths between powder particles for efficient sintering.
Clean turn-off characteristics: no tailing or freewheeling during current turn-off, accurately controlling single-pulse energy and avoiding ineffective heating or local overheating.

SPS Power Supply

Power

30 kVA

Input Voltage

Three-phase five-wire AC380V/50Hz

Output Current (instantaneous)

DC 0-3000 A

Output Voltage (instantaneous)

DC 0-10 V (rectangular wave peak)

Pulse Parameters

On-time: 1-255 ms
Off-time: 1-255 ms
Pulse count: 1-255 ms
Dwell time: 3-255 ms

Control System

The control system consists of a PLC program and a touch screen. The touch screen integrates the company’s proprietary control system. All operations are integrated into the touch screen – user-friendly interface, one-button operation, simple and convenient. Temperature and pressure process settings, heating and pressing start, vacuum pump and valve control, and pressure alarm settings can all be done via the touch screen.

Chamber Vacuum Degree

< 5 Pa

Chamber Gas Filling Pressure

< 0.05 MPa

Pressure Rise Rate

<4 Pa/hour

Chamber Interior View

Broken Thermocouple Protection & Indication

Yes

Over-temperature Protection

Yes

Over-current Protection

Yes

Under-voltage Protection (Water Pressure)

Yes

Temperature Control Mode

Intelligent PID

Temperature Control Accuracy

±1°C

Temperature Measurement Methods

Tungsten-Rhenium thermocouple + infrared pyrometer.
Tungsten-Rhenium thermocouple range: 0–1800°C.
Infrared pyrometer range: 600–3000°C.

Infrared Pyrometer

Japan Chino IR-CZ H7T is a high-end, ultra-high temperature fiber-optic infrared pyrometer. Its notable feature is a robust probe consisting of a sapphire lens and optical fiber, which transmits infrared radiation energy to a rear converter for processing.
Spectral response: typically short wavelength 0.9–1.55 μm, ideal for measuring high-temperature, bright or polished metal surfaces (e.g., molten steel, stainless steel, tungsten, molybdenum), as well as silicon crystals, graphite, etc. It maintains good measurement performance even at low emissivity.
Two-color infrared pyrometer, range 600–3000°C.
Strong anti-interference, unaffected by electromagnetic interference.
High measurement accuracy: below 1000°C: ±5°C; 1000–1500°C: ±0.5% of reading; 1500–2500°C: ±0.6% of reading; above 2500°C: ±1% of reading.

Observation Window Size

Yes (provided)

Pressing System

Electric input method. Hydraulic station with imported proportional valve, potentiometer, pressure sensor, displacement display using a grating ruler (accuracy 0.02 mm), hydraulic cylinder and related hydraulic devices. Pressure adjustment can be switched between manual and automatic, and can be adjusted manually. Automatic pressure adjustment can be set via the touch screen, with stable pressure holding capability. 

Temperature Control Instrument

Eurotherm 3504 programmable temperature controller.
1. High-precision temperature instrument, LCD display, 5-digit display, simple configuration via quick setup, °C/°F switching.
2. 500-segment program control, 8 groups of PID intelligent adjustment.
3. Over-temperature protection and broken thermocouple protection – when over-temperature or thermocouple break occurs, the furnace heating circuit is automatically cut off (when the furnace temperature exceeds 1820°C or the thermocouple burns out, the AC relay on the main circuit automatically disconnects, the main circuit is cut off, the ON lamp on the panel goes out, the OFF lamp lights up, effectively protecting the furnace).
4. Supports various communication interfaces: Modbus, Ethernet, Profibus, Devicenet – can be integrated with any PLC or upper-level system.
5. Power-off protection: after power failure and restart, the program does not start from the initial temperature but from the furnace temperature at the time of power failure.
6. The instrument has an auto-tuning function.

Graphite Mold

1. The high-temperature mold unit is made of high-purity graphite. Maximum working pressure: 50 MPa.
2. Carefully design the dimensions of the high-temperature mold and select the correct pressure.

Pressure Control

PID program control

Punch Stroke

60 mm

Maximum Temperature

For 10 mm material: 2300°C
For 15 mm material: 2000°C

Pressing Pressure Accuracy

±1 kg

Maximum Pressure

2 T

Water Cooling System

Composed of pipes and related devices. Cooling water enters the main inlet, then is distributed through branches to the furnace body, furnace cover, furnace bottom, water-cooled electrodes, and other points requiring cooling, then collected and discharged. Cooling water circulation hoses are made of high-temperature-resistant rubber. The main inlet pipe is equipped with an electric contact pressure gauge – when water pressure drops below 0.2 MPa, heating is automatically cut off. The main outlet pipe is equipped with a temperature sensor – when the temperature exceeds 45°C, heating is automatically cut off.

Unit Input Voltage

380V / 220V

Bellows

KF25×1000

Vacuum Gate Valve

KF25

Rotary Vane Pump RV-4

Power

0.55 KW

Voltage

380V

Speed

1420 rpm

Inlet Port Diameter

KF25/KF40

Pumping Speed (fore pump)

4 L/s

Ultimate Pressure

4×10⁻² Pa

Resistance Vacuum Gauge

Model

ZDR-1

Power Supply

220V, 55W

Control Accuracy

±1%

Measuring Range

10⁻¹ Pa ～ 10⁵ Pa

Power Supply

220V, single phase

Total Input Power

5.3 KW

Maximum Head

44 m

Maximum Pump Flow

75 L/min

Tank Capacity

40 L

Cooling Capacity

7738 Kcal/h

Water Inlet/Outlet Port

Rp 1"

Machine Dimensions

83 × 65 × 117 cm (L×W×H)