Dual-Density Car Seat Foaming Line Upgrade Case | Hubei, China

A Hubei automotive seat project combining three-component dual-density PU foaming, robotic pouring and a turntable to replace separate production lines.

Dual-Density Car Seat Foaming Line Upgrade in Hubei

Project Background Located in an auto parts industrial park in Hubei Province, the customer is a manufacturer specializing in automotive seat foamed parts, producing about 450,000 cushion, backrest and headrest parts per year with revenue of about RMB 120 million in 2025. Challenges Soft-density and high-resilience parts ran on two separate lines, with density fluctuation of ±10%, a defect rate of 5%–8% and changeover time over 1 hour. Haifeng Solution The customer adopted the Haifeng turnkey dual-density car seat PU foaming line, integrating a 3-component dual-density high-pressure foaming machine, a pouring robot and a turntable line. Results Per-line capacity rose about 57%, density fluctuation fell to ≤±3%, defect rate to ≤2%, manpower dropped from 16 to 8, with annual savings of about RMB 1.4 million and a payback period of about 3.5 years.

Turnkey Line Configuration

The customer selected the Haifeng dual-density car seat PU foaming line turnkey solution, consisting of a 3-component dual-density high-pressure foaming machine, a pouring robot and a turntable line.

EquipmentModelQtyFunction
3-Component Dual-Density High-Pressure Foaming MachineHF-HPM-2A1B-DualDensityCarSeat1 setThree material circuits (2 POLY + 1 ISO); mixing-head inlet and chamber configuration follows the approved equipment specification. Closed-loop metering with flow meters + VFDs.
Pouring Robot1 setAutomatic pouring along set trajectories, uniform spreading and accurate positioning
Turntable Line1 setMulti-station turntable, cyclic mold carrier operation: pouring–foaming–mold opening–part removal
Electrical Control System1 setPLC intelligent control with parameter setting, status monitoring and fault alarm

Upgrade Results

+57%
Per-Line Capacity
Per-line capacity up from about 700 to 1,100 pcs/day
≤2%
Finished-Product Defect Rate
Project-reported defect rate reduced from 5%–8% to ≤2%. Figures apply to the stated project conditions; no single relative reduction is inferred from the baseline range.
-50%
Manpower
Operators cut from 16 to 8
Dual-Density Car Seat Foaming Line Upgrade Case Hubei, China

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