Length control device for film unwinding

• Main Authors: ZHANG NIANFU, XUE ZHENGDONG
• Format: Patent
• Language: Chinese; English
• Published: 31.03.2020
• Subjects: BORING; CONVEYING; HANDLING THIN OR FILAMENTARY MATERIAL; HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS,CABLES; MACHINE TOOLS; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PACKING; PERFORMING OPERATIONS; PHYSICS; STORING; TESTING; TRANSPORTING; TURNING

The utility model discloses a length control device for film unwinding, which comprises a winding and unwinding mechanism, a winding and unwinding mechanism, a winding and unwinding mechanism, a winding and unwinding mechanism, a winding and unwinding mechanism, a winding and unwinding mechanism, a winding and unwinding mechanism and a winding and unwinding mechanism, the unwinding guide mechanismis provided with a guide hopper below the winding core and is used for enabling the unwound winding film to move along the inner contour of the hopper to be guided to a next station; the detection mechanism is provided with a first sensor and a second sensor, the first sensor is used for detecting the diameter of the roll film on the roll core before the roll film is unwound and after the roll film is rewound, and the second sensor is used for detecting the stop position when the remaining roll film after cutting is rewound. The film unwinding mechanism can adapt to unwinding of films with different lengths, it can b