Graphite mixer machine

WHY choose us

The graphite mixer completes mixing, deburring, and film formation in 3 minutes, resulting in 15% less graphite uniformity, 50% less friction, 1.8 times longer mold life, and a 60% reduction in defect rate. Synchronized operation saves 60% on labor, achieving a 98% yield rate – highly efficient and low-cost.

During the mixing process, a dense and continuous 3–5 μm film of graphite is formed on the surface of the copper billet, which reduces the coefficient of friction by more than 50% at high temperatures and results in more complete filling.

Simultaneous deburring and filling of micro-dimples reduce the rate of defects such as folding and missing material after hot stamping by 60%, and improve dimensional accuracy by one level.

A single mixing process takes only 3–6 minutes to coat the entire batch of billets. When combined with automatic feeding and furnace cycle time, it increases single-shift output by 30%.

Graphite usage is reduced by 15%, mold life is extended by 1.8–2 times, subsequent shot blasting and polishing processes are halved, and labor and energy consumption are significantly reduced.

Through linkage, the traditional “manual ink application → heating → single-machine red die stamping” process can be upgraded to a fully automated continuous flow, saving 60% of labor, increasing mold life by 1.8 times, and stabilizing the yield rate at over 98%.

Copper billets are vibrated and sorted by a metering belt, and then fed into the mixer in batches according to the red-hot stamping machine’s cycle time (e.g., 20 pieces/min). The mixer’s PLC records the weight of each batch and exchanges “requirement/completion” signals with the red-hot stamping machine’s main control unit to ensure that there is neither material accumulation nor idle time.

The graphite mixer completes the “mixing-deburring-film formation” process in 3 minutes. The pneumatic valve at the bottom of the barrel is directly connected to the sealing belt. The discharge port height is the same as the gripping position of the walking beam/robot, so the copper billet can enter the induction heating furnace without secondary loading.

Infrared temperature measurement is set at the outlet of the heating furnace. If the temperature is qualified, the signal is sent to the safety interlock of the hot stamping machine. If it is lower than the set value, the robotic arm automatically returns the copper billet to the heat preservation position to ensure that the temperature of each billet is consistent and to reduce the thermal shock of the mold.

Micro-spray graphite emulsion nozzles are installed near the lower die of the hot stamping machine, automatically replenishing the spray based on die count or stamping pressure fluctuations; simultaneously, the mixer receives feedback on the “replenishment spray count” and automatically adjusts the graphite ratio for the next batch of copper billets, achieving optimal lubrication throughout the entire process.

All cycle time, temperature, pressure, and lubrication dosage are entered into the MES system to generate batch traceability codes; mold life and mixer screw wear values ​​are linked to output, providing early maintenance reminders and reducing unexpected downtime.

The burrs on the surface of the copper billet are removed by utilizing the slippage and micro-cutting action of graphite particles, which helps in the subsequent hot stamping process at 600–700 °C.

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