Graphite Seal Ring Press

How this press is built

Engineered around heavy structural columns, the Graphite Seal Ring Press provides 465 Ton of stable compaction power for dynamic & static seal rings in envelopes up to Engineered to client drawing envelope (Build HSE-257). The hydraulic controller manages ram acceleration, powder densification, and a 69-second pressure dwell. Gradual pressure dissipation protects fragile green edges during subsequent bottom-cylinder soft ejection.

Material behaviour under compaction

Optimized for cold preforming of fine-grain synthetic carbon graphite, the machine structure accommodates bulk volume reduction ratios between 3.2:1 and 4.2:1 with ample die fill daylight. Platen deflection is constrained under 0.04 mm/m under peak load, ensuring uniform green density distribution across both thick and thin wall sections before thermal sintering.

Tooling and die design

Our toolroom integrates vacuum-hardened AISI D2 steel dies (58–62 HRC) directly onto the press bolster. Precision guide columns and self-aligning ball seats prevent uneven punch wear during high-volume compaction of dynamic & static seal rings.

Sizing and machine selection

Selecting the ideal Graphite Seal Ring Press configuration requires evaluating component envelope, cavity layout, and hourly production quota. Our technical team calculates tonnage requirements (465 Ton rating) and prepares turnkey proposals including press, dies, and spare parts.

Quality checks and inspection

Before dispatch, the machine undergoes extensive Factory Acceptance Testing: hydraulic circuit pressure integrity checks, tie-bar alignment verification, and trial pressing of sample parts.

Installation and commissioning

HEMSUN ENGG. INDUSTRIES supplies complete electrical schematics, hydraulic P&ID diagrams, foundation anchoring templates, and spare seal kits. Our field service engineers provide on-site installation, hydraulic oil charging (ISO VG 68), commissioning, and comprehensive machine operator training worldwide.

Export packing and lead time

Export shipments include complete international documentation (Certificate of Origin, packing lists, commercial invoices), multi-voltage wiring (415V/50Hz), and robust seaworthy wooden crating for safe containerized ocean transit.

Maintenance and spare parts

Recommended servicing includes 1,000-hour hydraulic fluid checks, routine column bushing greasing, and periodic valve inspections. Complete spare seal packages are cataloged by machine serial number.

Safety and guarding

The safety system integrates optical perimeter curtains, two-hand concurrent start controls, hydraulic ram lock valves, and emergency stop circuits wired into the main PLC.

Specifications