Low pressure vacuum plasma spraying system
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Based on the mature vacuum plasma spraying technology, combined with innovative mixing process design, Zhengzhou Lijia low pressure vacuum plasma spraying system is committed to the production of high-performance, high-reliability functional coatings. The system combines the advantages of low pressure environments with high energy plasma to meet the demanding coating requirements in high-end fields such as aerospace, energy equipment, and medical devices. |
System core characteristics
Low pressure spray environment: Wide chamber operating pressure range (0.5 mbar to 300 mbar), suitable for a variety of material processes.
High energy plasma output: Plasma power up to 200kW, providing a stable and high enthalpy jet to ensure maximum particle kinetic energy.
Intelligent motion control: six-axis CNC manipulator and precision fixture system are used to support uniform spraying of complex curved parts, with a maximum bearing weight of 60 kg.
Modular vacuum system: Designed for low pressure and high flow gases, with rapid evacuation and circulating cooling to improve process efficiency.
Advanced process characteristics
Flexible process window: By adjusting plasma power, gas flow and powder feed rate, precise coating thickness (1 micron to 300 micron) can be controlled to achieve diverse needs from ultra-thin dense layers to thick columnar structures.
Efficient pretreatment integration: automatic parts preheating and arc cleaning before spraying, reducing interface pollution and enhancing coating bonding force.
Composite coating capability: Enables continuous spraying of different materials in a single process without process disruption, significantly increasing productivity.
Coating process type
PS-PVD (Plasma spraying - physical vapor deposition) : by vaporizing raw material powder, deposited to form a columnar crystal structure, suitable for thermal barrier coating (100-300 microns), excellent high temperature resistance.
PS-CVD (Plasma Spray-Chemical Vapor deposition) combines gaseous precursors with plasma energy to produce CVD-like films (<10 microns) at high deposition rates with high purity and uniformity.
PS-TF (Plasma Spray-thin Film technology) optimizes jet velocity and enthalpy parameters to achieve nanoscale dense coatings, suitable for surface strengthening of precision devices.
Application field
Aerospace: Thermal barrier coating for turbine blades, corrosion resisting coating for engine components.
Energy equipment: fuel cell bipolar plate conductive coating, nuclear reactor parts protective layer.
Medical implants: wear-resistant coating for artificial joints, biocompatible surface modification.
Industrial precision parts: mold surface strengthening, anti-wear coating for semiconductor equipment.
The basic concept and work flow of coating process
1. Parts mounting preparation: load the parts to be painted into the jig.
2. Vacuum environment creation: Close the door of the transfer chamber and vacuum to the initial vacuum degree.
3. Inert gas backfill: After reaching the initial vacuum, fill with high purity argon to the working pressure.
4. Process chamber connection: Open the gate valve connecting the transfer chamber and the main chamber.
5. Core coating treatment: parts into the main chamber, transfer parts preheat, parts T/A cleaning and coating deposition.
6. Parts transfer and handover: the parts that have completed the painting are transferred to the air return part.
7. Chamber isolation and closure: After the parts are turned out, close the gate valve connecting the main chamber and the transfer chamber.
8. Cooling and pressure recovery: After the gate valve is closed, start the cooling circulation system to cool the parts; Backfill the transfer chamber to atmospheric pressure.
9. Parts unloading completed: After the pressure of the transfer room is normal, the parts are removed manually or with the loader.
System configuration options
Loading mode: semi-automatic or automatic workpiece loading, suitable for mass production and customization needs.
Process monitoring: Integrated on-line spectrometer and thermal imager to monitor coating quality and process stability in real time.
Extended functions: Optional preheating chamber, multi-axis manipulator and customized spray head.
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