Maximum Pressure Valve
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 LIVAMACH.
The maximum pressure valve has the function of regulating the maximum pressure in the hydraulic circuit.
It is used to protect the pump and the other components of the system from excessive pressure and therefore to keep the level inside the hydraulic circuit constant.
It is a normally closed valve capable of opening when a predetermined pressure is reached and discharging the flow rate necessary to keep the circuit pressurized.
In fact, in the event of a malfunction of the hydraulic circuit, this safety valve prevents an excessive quantity of oil from reaching the cylinder, thus preventing the risk of overpressure.
Anchoring Electrical Cables
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.
Anchoring Hydraulic Pipes
As a safety measure, the hydraulic hoses of all the presses produced by LIVAMACH 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.
Stopflex Anchor
All the presses produced by LIVAMACH include safety systems for anchoring the hydraulic pipes.
In fact, the force released by a flexible hose under pressure, in the event of the fitting slipping out, would be very dangerous for things or people nearby.
It is for this reason that the hydraulic tubes of all the presses produced by LIVAMACH are fixed using the Stopflex retention system, which was designed to stop the stroke of the pulled tube and prevent the force released inside it from triggering a fearful " whip effect” and at the same time flood the working environment with hydraulic oil.
Thanks to this system, in fact, the flexible hose is anchored to the system via a rope, thus guaranteeing full protection of the operators and the protection of the press and the workshop.
Anti-Fall and Anti-Explosion Valves
As a safety measure to guarantee the safety of the operator and to safeguard the machine, anti-fall and anti-explosion safety valves are installed on all hydraulic molding presses produced by LIVAMACH.
The anti-fall valve (1) has the function of keeping the hydraulic cylinder under pressure in the event that the hydraulic hose slips out. In this way, the cylinder, despite the weight of the upper platform connected to it, would remain stationary in its position and would not fall downwards, thus avoiding injuring the user.
As a further form of safety, the anti-explosion valve (2) is installed, which comes into operation in the event that the anti-fall valve jams.
The function of the anti-burst valve is to drain the hydraulic oil from the cylinder if the pressure rises beyond the permitted limit and therefore prevents the cylinder itself from bursting.
Both valves are from the famous Rexroth brand which is recognized globally for its high quality and extreme reliability products.
Current Transformer
The press works with a three-phase electrical system with a 400V power supply.
As a safety measure there is a transformer inside the electrical panel which reduces the current from 400V up to 24V, that is, up to a voltage that is not dangerous for human health.
In fact, in the event of a system malfunction, the current could propagate to the electrical panel, with the risk that the operator could suffer an electric shock when he presses one of the buttons on it.
Pipe Lifting and Rotation Supports
The pair of supports is equipped with a hydraulic motor and has the function of lifting and rotating the pipe that needs to be straightened.
These supports therefore allow easy movement of the metal piece to be worked and consequently simplify the pressing operations.
The pair of supports is sliding and their positioning along the bed of the electro-hydraulic press is done manually.
Digital Control with Siemens Touchscreen Display
With the Siemens touchscreen display you can set the following parameters:
- Maximum upstroke and downstroke of the hydraulic cylinder
- Pressure maintenance time on the lower platform
- Work pressure
- Decompression time
- Piece counter
- Prestop ascent/descent: function that allows you to stop the ascent or descent before reaching the quota, thus eliminating errors caused by speed and cavitation due to the weight of the mould. It guarantees an accuracy of 0.1mm.
- Alarm management
There is the possibility of storing 100 different programs with a progressive number.
You can choose between manual and automatic modes.
In automatic mode the cylinder rises automatically.
The stroke is read using a wire encoder.
The pressure is read using a transducer installed on the hydraulic control unit.