650T Cold Chamber Die Casting Machine for Precision Aluminum 5-Star Office Chair

Purpose-built for manufacturing precision aluminum 5-star office chair bases with stable load-bearing performance, this 650-ton cold chamber die casting machine delivers accurate forming of central mounting hubs, five supporting legs and caster sockets for office furniture. Five-star chair bases require precise center hole alignment, uniform leg thickness and sufficient structural rigidity to reliably support user weight without bending or cracking; any dimensional deviation will cause unstable swiveling, uneven load distribution or structural failure. This 650T equipment realizes one-piece high-precision forming of large chair base bodies, central gas-lift mounting hubs and five leg structures, ensuring every finished aluminum office chair base meets consistent functional and safety standards.

The machine adopts an extra-heavy-duty reinforced frame structure equipped with high-strength alloy tie bars, enlarged wear-resistant steel pins and extra-thick machine platens engineered for stable 650-ton clamping force. This ultra-rigid architecture delivers exceptional impact resistance and load stability during high-pressure cold chamber die casting, minimizing mold deflection and micro-vibration during large-part forming. For 5-star chair base production, it guarantees consistent center hub tolerance, uniform leg wall thickness and accurate caster socket positioning across every production cycle. The robust construction suppresses long-term mechanical deformation, extends equipment service life and fully supports non-stop high-volume production of large aluminum furniture structural parts.

At its control core is a genuine German PLC system paired with a full-color human-machine interface touchscreen, enabling real-time precise monitoring and adjustable control of injection speed and pressure. Advanced closed-loop control technology delivers fine graded regulation throughout the entire filling cycle, ensuring complete, clean formation of thick-wall central hubs, five leg structures and caster mounting sockets without cold shuts or shrinkage defects. This guarantees reliable load-bearing performance and stable swiveling function for every aluminum 5-star office chair base. The simplified electrical circuit design maintains stable, reliable operation even in high-temperature workshop environments, and the built-in fault display function quickly identifies electrical system abnormalities to minimize unplanned downtime.

The hydraulic system operates on dual-proportional control architecture to realize fully programmable multi-stage injection and low-pressure buffered mold clamping, which protects delicate center hub core inserts and precision mold cavities from impact damage. All hydraulic seals are sourced from premium European or Japanese brands, ensuring long-term leak-free, stable performance under continuous 650-ton operation. A hydraulic die height adjustment system enables fast, labor-saving mold installation and changeover, reducing setup time for different chair base sizes. An automatic pressure relief energy-saving function effectively cuts unnecessary hydraulic energy consumption during continuous operation.

The clamping and die height adjustment mechanism ensures uniform stress distribution across the large platen and stable mold positioning, avoiding center hole deviation and leg length inconsistency in chair bases. The injection unit with high-flow valves and a precision piston accumulator delivers powerful, consistent injection performance that fully fills large-area 5-star chair base molds. A high-efficiency oil cooling system maintains stable hydraulic temperature during long-shift production, supporting a reliable service life of 15 to 20 years. An optional mold sweeping robotic arm is available to upgrade production automation.