The GNP electro-hydraulic press features two independent hydraulic drives: a main slide for forming and deformation, and a blank holder cushion for controlled sheet movement during deep drawing.
The two hydraulic drives work together to provide fast, precise, and controlled forming operations.
The electro-welded steel frame is designed for high rigidity and minimal deflection under maximum load, ensuring stable and accurate forming performance.
As a safety measure to guarantee the operator's safety and to safeguard the machine, a maximum pressure valve is installed inside the hydraulic control unit on all hydraulic presses produced by SICMI.
The tubes for the passage of the electrical cables are anchored to the press frame by means of special collars.
Unlike many competitors who use simple plastic ties that are destined to dry out and break quickly, these collars are made of highly resistant material and are screwed to the structure of the press.
As a safety measure, the hydraulic hoses of all the presses produced by SICMI are firmly fixed to the machine frame using special collars which prevent any movement of the hydraulic hose.
These collars have the base welded to the frame, while the upper part is screwed.
All SICMI hydraulic presses are equipped with the Stopflex hose retention system, designed to secure pressurized hydraulic hoses and prevent uncontrolled movement in the event of fitting failure.
The system helps reduce the risk of the whip effect, protects personnel and equipment, and limits hydraulic oil release into the working area.
All SICMI hydraulic presses are equipped with anti-fall and anti-burst safety valves to protect the operator and machine.
24V Low-Voltage Control System
The press operates with a 400V three-phase power supply. For operator safety, a transformer inside the electrical panel reduces the control voltage to 24V, minimizing the risk of electric shock.
The CE certificate of conformity, Annex IV, certifies that the hydraulic presses satisfy all the safety parameters required by current European regulations.
This certificate is issued by a specific external body which verifies that a specific model of hydraulic press complies with the safety requirements established by the regulations.
This certificate is mandatory for models of electro-hydraulic molding presses whose approach speed of the hydraulic cylinder exceeds 30 mm/sec.
Monitored solenoid valves provide continuous hydraulic flow control through the press CPU. If a hydraulic malfunction occurs, they immediately signal the CPU to stop pressing, protecting the machine from damage.
Standard on our high-speed electro-hydraulic presses, these valves ensure safe and reliable hydraulic system operation.
Fixed protective nets are essential components in hydraulic presses, ensuring the safety of operators.
These sturdy nets are made of aluminum and surround the working area of the hydraulic press.
Their main function is to prevent unauthorized or inadvertent access to the pressing area, minimizing the risk of serious injury.
Four self-lubricating guides ensure smooth, precise movement of the upper work surface for accurate molding operations.
Standard on high-speed hydraulic presses and PST/PCL models from 300 tons, with optional availability on 40–200 ton versions.
The air/oil heat exchanger cools the hydraulic circuit and maintains a stable oil temperature, preventing overheating and protecting the hydraulic system and seals.
Recommended for continuous operation and long production cycles. On large-tonnage presses, a recirculation system with a separate motor provides enhanced cooling performance.
The pressure switch monitors hydraulic pressure and regulates the maximum working pressure according to the preset value.
On automatic presses, it enables automatic cylinder retraction when the set pressure is reached. With a Siemens digital panel, pressure settings can be adjusted directly via the touchscreen.
The press allows precise stroke adjustment through microswitches that control the cylinder's maximum descent and ascent positions.
The variable displacement piston pump precisely controls hydraulic oil flow to adjust the press speed and compression force.
As pressure rises, it enables greater efficiency, providing smoother pressure control and greater flexibility during forming operations. Unlike standard pumps, it enables a gradual transition between approach and working speeds.
The decompression valve safely releases accumulated hydraulic pressure before the cylinder rises, preventing overloads and protecting the hydraulic system.
It ensures smooth cylinder movement without sudden pressure changes, making it especially recommended for high-pressure applications.
Photoelectric barriers create an invisible infrared safety zone around the press. If the beam is interrupted, the pressing cycle stops immediately, protecting the operator.
They allow single-button or pedal operation while maintaining a protected working area.
The hydraulic cushion counteracts the main cylinder force, controlling its descent during deep drawing operations to form complex sheet-metal shapes.
Installed beneath the lower table, it features a hydraulic cylinder, mobile table with 4 self-lubricating guides, and adjustable stroke control.
Safety sensors protect the cushion and prevent press movement if the access door is opened during operation.
Available for 20–80 tons.
The optional Siemens KTP 700 Basic touchscreen provides precise control of the hydraulic press, including:
Up to 100 machining programs can be stored. Stroke and pressure are monitored via a wire encoder and pressure transducer.
When equipped with a hydraulic cushion, its operation can also be controlled through the touchscreen.
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