JPH03259855A - Control method for stopping film equipment winder at specified tail end position - Google Patents

Abstract

PURPOSE:To stop a winder at a specified position required for a sample at the tail end by calculating the base decelerating length from the coil diameter and winding speed of the winder, comparing it with that of winding effective length ranging from cutting to tail end stopping corresponding to the tail end stopping set value, and stopping the winding at a time when the effective length becomes the same or smaller. CONSTITUTION:The extent of decelerating length LDEC in a film base 1 is calculated from a coil diameter DN being wound on a winding shaft 2A of a winder and the winding speed. Then, it is compared with the extent of winding effective length LT ranging from cutting, by a cutter corresponding to the set tail end stop setting value LB, to tail end stopping, and when LT <= LDE is the case, a stop command is given to the winder at a point of time when feed length Ls of the base 1 from the cutting comes to Ls=LT-LDE. With this constitution, the winder is stopped at the specified tail end stopping position at all times, unaffected by any variation in the winding diameter and speed, thus preoperation for sampling is omissible.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method for controlling the tail end of a winder for film equipment to stop the base tail end of a film at a specific position on a winding roll. It is.

(Prior Art) Generally, when winding a film in a film facility, a winding machine has a two-shaft structure as shown in FIG. 3 in order to perform continuous rewinding operation.

That is, in FIG. 3, the film base 1 is wound alternately around two winding shafts 2A and 2B.
For example, as shown in the figure, when the winding diameter reaches a predetermined value after being wound around the winding shaft 2A, the winding shafts 2A and 2B are rotated to the rewinding position by the turret 9, and the base is cut by the cutter 4 to wind the winding. The winding is transferred to the take-up shaft 2B, and the two take-up shafts are stopped at the required tail end position for the sample operation.

3A and 3B are tending rolls, 5 is a measuring roll, 6 is a press roll, 7 is a sample roll, and 8 is a sample stand.

In this case, conventionally, rewinding is performed during operation at a specified rewinding speed, and a timer is used to stop the winding shaft after cutting is completed. When changing the winding diameter and winding speed, the timer is changed to match the stop position.

(Problem to be Solved by the Invention) However, since the above conventional method uses a timer stop method, it is necessary to change the timer value each time the winding diameter or winding speed is changed when changing clothes, and it is necessary to stop the timer. Accuracy is also not good.

In current operations, product types are often switched during continuous operation, and the tail end position changes depending on the product type, making it necessary to align the tail end position each time during the next sample run.

The present invention has been made in consideration of the problem described in item 1 above, and it is possible to stop the tail end of the base at a desired position without being affected by the winding speed depending on the diameter of the winding coil. It is an object of the present invention to provide a method for controlling the tail end of a winder for film equipment to stop at a fixed position, which does not require prior work.

[Structure of the invention]

(Means and Effects for Solving the Problems) The present invention provides a film base that is wound up by a winder for film equipment, and after being cut by a cutter, the tail end of the base is placed at a predetermined winding position necessary for sample operation. In the method for controlling the fixed position stop of the tail end of a winder for film equipment, which stops the winder in a fixed position, the base deceleration length LDEC is calculated from the coil diameter of the winder and the winding speed, and this deceleration length 1-D E
Compare C with the tail end stop setting value and the effective tailing length from cutting to tail end stop corresponding to B, and find that LT≦LD.
When using EC, the base feed length from cutting is 1. s is L3 =
At the time when LT LDEC, LT<LDE again
When C, the coil winding length by an integral number of rotations of the winding machine is L.
As H, the feed length L3 on the above base is ls= (LT+L
M) Give a stop command to the winder when -Logc>O, and the winder will always stop at the predetermined tail end stop position without being affected by changes in winding speed or winding diameter. This allows the pre-work for sampling to be omitted.

(Example) An embodiment of the present invention is shown in FIG.

Figure 1 shows the winding machine part of the film equipment, with the winding shaft (old shaft) 2A before rewinding, the winding shaft (new shaft for rewinding) 2B, the tension roll 3, the cutter 4, and the measuring ring. It is composed of a roll 5 and a press roll 6, where Do is a winding core diameter, DN is a winding coil diameter, and LB is a tail end stop setting length.

Here, the coil diameter DN of the winding shaft (old shaft) 2A is constantly detected using the following equation 0).

Here, N is the number of rotations of the winding shaft, n is the number of rotations of the measuring roll, and d is the diameter of the measuring roll.

Next, from this coil diameter detection value DN and the winding shaft rotation speed N,
The deceleration length L DE C is calculated using the following formula (2).

Here, NMAX is the maximum winding rotation speed, and LMAX is the deceleration length determined by this maximum rotation speed NMAX and the coil diameter DN.

In addition, the length of the unwound base at the time of completion of cutting for rewinding is:
From the values of each part shown in Figures 1 and 2, the following (3), (
Using the 4L (c) formula, it can be approximately determined by the 0 formula.

1, n: 4L1” + (L2+DT/2)2
... (3) e a= cos-'
(L1/Lo) -・・・・@
) Ob=cos-1(DN/2L.>
=・= (51L =AB+JLa'-(D
N/2)” πDN(180-e a-Ob)/36
0... (to) Furthermore, from this unwinded base length and tail end stop setting length LB, determine the effective winding length. is calculated using the following formula 0.

LT= L -LB ■ Here, the deceleration length LDEC of the winding shaft and the effective winding length LT
When LT≧LDIEC, the base feed length LS from the cutter's completion of cutting to the stop command is LS "I-T LDEC (8) as shown in Fig. 4. Therefore, it is possible to stop the tail end as it is.

On the other hand, as shown in Fig. 5, if L7<Lopc, it is not possible to stop at the desired tail end stop position as it is, so the winding length M corresponding to the number of rotations of the old winding shaft N8 is determined as follows ( 9) Find it using the formula and add it.

LH=πDNNa ■ Here, DN is the winding coil diameter, and N8 is (LT+LH)
> The minimum number of rotations of the take-up shaft for LDEC.

Therefore, the base feed length LS in this case is LS''
(LT+LH) Given by LDEC (10).

Therefore, if a stop command is given to the winder when the film base has been advanced by the above-described distance s after the cutting operation by the cutter 4, the winder will stop at the desired tail end stop position.

〔Effect of the invention〕

As explained above, according to the present invention, the tail end of the film is brought to a specific position required for the sample without being affected by changes in the winding speed and coil diameter of the winder of the film equipment having the sample device. Therefore, pre-sampling operations can be omitted, and the sample device can be automated.

In addition, when changing the specified maximum diameter of the winding coil diameter or replacing the motor, it is necessary to change the deceleration rate depending on the motor capacity, but according to the present invention, the maximum deceleration length and maximum This can be easily done by checking the rotational speed, and it is also possible to simply change the deceleration rate.

[Brief explanation of drawings]

Fig. 1 is a layout diagram of each part showing an embodiment of the present invention, Fig. 2 is a dimensional drawing of each part of the winding coil in Fig. 1, Fig. 3 is a general configuration diagram of a film winding machine, FIG. 5 is an explanatory diagram of a method for calculating the base feed amount in the present invention. 1... Film base 2A, 2B... Winding shaft, 3A, 3B... Tenden roll 4... Cutter 5... Measuring roll 6... Press roll 7... Sample roll 8
・・・Sample stand 9...Turret 10・
・Base stop position

Claims (1)

[Claims] A winding machine for film equipment that stops the winding machine so that the tail end of the base after being cut by the cutter of the film base wound on the winding machine for film equipment comes to a predetermined winding position necessary for sample operation. In the tail end fixed position stop control method, the base deceleration length L_D_E_C is calculated from the coil diameter and winding speed of the winder, and this deceleration length L_D_E_C is calculated from the tail end from the cutting corresponding to the set late end stop setting value L_B. Compared with the effective winding length L_T until stopping, L_T≦L
When _D_E_C, the base feed length L_S from cutting becomes L_S=L_T-L_D_E_C, and when L_T<L_D_E_C, the base feed length L is set as L_M, which is the coil winding length by an integral number of revolutions of the winding machine.
_S is L_S=(L_T+L_M)L_D_E_C>0
1. A method for controlling the tail end of a winder for film equipment to stop at a fixed position, the method comprising: giving a stop command to the winder when