Pulse Plasma Compaction method is a universal and efficient way of powder consolidation. Its universality provides a possibility to consolidate pure metal powders, metal alloys and ceramic and metal composites. Sintering efficiency results from hot pressing, in which the powder is heated up using short high current impulses.
During the PPC process, electrical energy stored in the battery of capacitors is dissipated in a closed circuit of capacitors /consolidated powder / stamps using electronic switch. Capacitor bank is adapted to pulse operation at the voltage of 6000 V and big rates of current rise. The main advantages of this method are short sintering time and low pressing load.
Sintering unit includes the following main modules:
Vacuum Chamber is equipped with vacuum-voltage glands together with electrically insulated slidable punches and electric terminals.
Pulse Plasma Compaction processes are effected in the graphite die.
The graphite set is placed in the vacuum chamber between punches.
It is recommended to use spacers and pads made of graphite film.
Control hardware of PPC devices consist of:
- PLC controller in which the control algorithm for Sintering Machine is implemented,
- Touchscreen of HMI system, which enables current operation of the device,
- PC for preparing recipes,
- IP camera that records production process taking place inside the chamber and archiving the data on the PC.
HMI workstation is an industrial computer operated via 17" touchscreen. It is a built-in control cabinet hanged on the boom.
Communication between computers and PLC takes place using Modbus TCP/IP network.
Cooling system screen
Hydraulic services screen