Machine for producing cardboard
AssigneeRenova S.R.L.
InventorsMarco Mariani, Ugo Re
Life of this patent
Estimating the term…
Abstract
The present invention relates to a machine for producing multi-layer cardboard or paper, or a machine for either printing or converting, starting from a reel of paper, cardboard or other material. In general, the invention can be applied to machines wherein a reel of different materials is unwound and which requires a contrast system to regulate the tensioning of the ribbon. In particular, the invention relates to a system for braking said reel. In particular, the invention relates to a braking system (2) for a support member (1) of a reel (B), for example, a reel of paper in a machine for producing cardboard or corrugated cardboard, wherein said braking system (2) comprises a motor-generator device (8) and a mechanical brake device (9) arranged coaxially.
Claims13
A braking system for a support member of a reel, wherein said braking system comprises a motor-generator device and a mechanical brake device arranged coaxially:
- comprising a command and control unit configured to perform the following operations:
- i) receiving the machine parameter values of line speed, paper tension, diameter of the reel and number of turns of the reel;
- ii) comparing said machine parameter values with pre-set values;
- iii) calculating a braking torque CL of the braking system to be supplied;
- iv) calculating the splitting of the braking torque CL between a braking torque CM of the motor-generator device and a braking torque CF of the mechanical brake device;
- v) commanding the motor-generator device and the mechanical brake device according to the calculation of step iv) for supplying the calculated braking torques CM and CF;
- vi) managing the electricity produced by the motor-generator device (8) and sending said electricity to a power supply network (E).
A braking system for a support member of a reel, wherein said braking system comprises a motor-generator device and a mechanical brake device arranged coaxially;
- wherein said mechanical brake device is an air brake, comprising:
- a detection device configured to detect, in real time, a tension applied to paper unwound from the reel;
- an electro-pneumatic converter operatively connected to said detection device, the electro-pneumatic converter being configured to regulate the air pressure to be sent to said mechanical brake device according to a preset braking torque value CL to be supplied;
- at least one pneumatic line connected to said electro-pneumatic converter and to said mechanical brake device;
- a pressure transducer connected, by means of a shunt, to said at least one pneumatic line and to a command and control unit,
- wherein said command and control unit calculates a splitting of the preset braking torque value CL to be supplied between a braking torque CF of the mechanical brake device and a braking torque CM of the motor-generator device according to the air pressure detected by the pressure transducer and it commands the braking torque CM of the motor-generator device according to said calculation.
Dependencies are inferred from the claim text.