Semi-Closed Single-Point Power Press Manufacturers

The Bolun Semi-Closed Single-Point Power Press is a hybrid engineering masterpiece designed for manufacturers who require higher precision and structural stiffness than a standard C-frame can provide, without moving to the larger footprint of a fully closed H-frame. By integrating a reinforced "Semi-Closed" frame design, this press offers an exceptional balance of heavy-duty performance and easy accessibility.

Engineered to Minimize Angular Deflection

The defining advantage of the Bolun Semi-Closed series is its ultra-rigid, steel-plate welded frame. Unlike traditional open-back presses that may experience "yawning" or angular deflection under high tonnage, our semi-closed architecture utilizes reinforced side columns to significantly limit frame opening. This ensures that the punch and die remain in precise alignment throughout the stroke, which is essential for maintaining part accuracy and extending the lifespan of expensive progressive dies, especially when processing materials exceeding 3.2mm in thickness.

Open-Access Versatility for Smart Production

While providing H-frame-like stability, the Semi-Closed design maintains the excellent front and side accessibility of a C-frame press. This makes it an ideal platform for both manual operations and high-speed automated lines. Its compact design allows for easy integration with NC servo feeders, uncoilers, and robotic transfer systems, providing maximum throughput in a space-efficient layout.

Uncompromising Build Quality

True to Bolun’s signature standards, the internal transmission system features a forged 42CrMo alloy steel crankshaft and premium CuSn12 tin bronze bushings. These high-grade materials, combined with a high-torque pneumatic friction clutch and a precision brake unit, ensure smooth power delivery and minimal thermal buildup during continuous three-shift operations.

Advanced Safety and Control

Every unit is managed by a PLC-based smart control system with a high-resolution HMI for intuitive operation. To safeguard your investment, we include a hydraulic overload protector to prevent equipment damage from tonnage spikes and a dual solenoid safety valve for failsafe operation. The Bolun Semi-Closed Single-Point Press is the definitive choice for precision stamping, offering the rigidity you need and the flexibility you want.