Web splicing method and web splicing apparatus
a web splicing and splicing technology, applied in the field of web splicing methods and web splicing apparatuses, can solve the problems of requiring an expensive measurement device, and achieve the effects of decreasing and increasing the amount of web stored in the accumulator
Inactive Publication Date: 2005-05-12
HIRATA TSUGIO +1
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
"The present invention provides a method and apparatus for splicing webs together without fluctuating the line velocity. This is achieved by controlling the circumferential velocity of the second roll of web based on the diameter of the second roll, which is connected to the end of the first web. By controlling the diameter of the second roll, the tension on the first and second webs being fed to the accumulator is kept at a predetermined value, and the first and second webs can be output from the accumulator at a constant velocity, even during the web splicing operation. This allows for a smooth splicing process and ensures a consistent output velocity for the spliced webs."
Problems solved by technology
While the diameter of the second roll may be obtained by directly measuring the diameter of the second roll, it requires an expensive measurement device.
Method used
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Embodiment Construction
[0016] One embodiment of the present invention will now be described with reference to the drawings.
[0017] A splicing apparatus illustrated in FIG. 1 alternately transfers a first web Wa fed from a first roll A and a second web Wb fed from a second roll B while connecting the first web Wa and the second web Wb together. The splicing apparatus includes a first driver 1A for spinning the first roll A, a second driver 1B for spinning the second roll B, a splicer 3, and an accumulator 4.
[0018] The first driver 1A and the second driver 1B may be driven separately by independent motors (not shown), or by a single motor while switching the connection therebetween by a clutch (not shown), or the like. Note that the web W is moving at a velocity VO by a driver (not shown). For example, when the driver is connected to a motor, a predetermined signal may be issued for each turn of the motor, based on which the velocity VO can be known. Such a motor may be a servo motor, or the motor that be ...
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Abstract
The present invention provides a web splicing method and a web splicing apparatus with which a line velocity on an output side of the splicing apparatus does not fluctuate through a web splicing operation. The method and apparatus are further operable to maintain a line velocity at a predetermined velocity after the web splicing operation. The method of the present invention includes the steps of: connecting a second web Wb fed out from a second roll B to a first web Wa; cutting off the first web Wa at a position between a point at which the second web Wb is connected to the first web Wa and a first roll A; spinning the second roll B to feed out the second web Wb; obtaining a value of a diameter of the second roll B based on a state of an accumulator 4; and controlling a circumferential velocity of the second roll B based on the obtained diameter.
Description
FIELD OF THE INVENTION [0001] The present invention relates to a web splicing method and a web splicing apparatus. BACKGROUND OF THE INVENTION [0002] Japanese Laid-Open Patent Publication No. 10-45290 discloses an automatic web splicing apparatus for splicing a web with another web while maintaining a constant tension on the web. With the conventional apparatus, the web velocity is detected by a line pulse generator on the output side of the automatic splicing apparatus to calculate the diameter of a roll of web based on the web velocity, or the like, and the braking force is controlled based on the diameter of the roll, or the like, thereby maintaining a constant torque. However, maintaining a constant line velocity on the output side of the automatic splicing apparatus is not taken into consideration. SUMMARY OF THE INVENTION [0003] Thus, it is an object of the present invention to provide a web splicing method and a web splicing apparatus with which the line velocity on an output...
Claims
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IPC IPC(8): B65H19/18B65H23/188B65H21/00
CPCB65H19/1852B65H2301/46412B65H2401/1121B65H2401/115B65H2403/72B65H2511/112B65H2511/142B65H2513/10B65H2555/24B65H2301/46327B65H2220/01B65H2220/03B65H2220/02B65H2401/112B65H2401/11B65H2511/14
Inventor HIRATA, TSUGIOOYAGI, YOSHINOBU
Owner HIRATA TSUGIO