JPS5934612B2 - Film material winding method and device - Google Patents

Description

[Detailed Description of the Invention] In winding machines for thin plastic films, as the diameter of the film increases, air entrainment occurs in the material being wound during winding. The roll (mill roll) of the film-like material formed was pressed by a presser roll and wound up while eliminating air that would be drawn into the mill roll.

Figure 1 shows one of the film winding machines commonly used in the past.
As an example, after feeding an empty core 1 to a fixed winding position, a cutter (not shown) cuts the film 2, and a presser roll 3 is used to automatically wind the film end around the core 1. After applying strong pressure, the air circuit supplied to the air cylinder 4 was switched, and the presser roll 3 was winding up the film 2 while gently pressing the mill roll 5. However, in this winder, the mill roll 5 is pressed more softly than when the diameter of the mill roll 5 is small at the beginning of film winding, that is, when the amount of air wound into the mill roll 5 is very small. It had the disadvantage that it could not be rolled to the required mill roll shape because it was rolled more tightly than it should be. The present invention has been proposed to eliminate the above-mentioned conventional drawbacks,
When winding a film-like material onto a mill roll from the beginning to the end of the roll using the same driving source, the film-like material is wound around the mill roll to a predetermined winding diameter, and then the winding diameter of the mill roll is detected by a winding diameter detection roll. At the same time, the pressure roll is switched to soft touch in response to the movement of the detection roll arm,
It is an object of the present invention to provide a method for winding up a film-like material, characterized in that the film-like material to be wound is wound up while being softly pressed onto the film-like material wound on the mill roll by the same pressing roll. .

In addition, the present invention uses a line connecting the rotation center of the winding diameter detection roll arm and the rotation center of the pressure roll arm as a fixed link,
a lever whose base is pivotally supported at the rotation center of the link and the roll diameter detection roll arm; a connecting rod that connects the free end of the lever to the lower end of the pressure roll arm; a four-bar link, a limit switch attached to the lever, a cam member attached to the lower end of the winding diameter detection roll arm and operating the limit switch just before the pressing roll contacts the mill roll, and the limit switch. Upon receiving a signal, the winding diameter detection roll is separated from the mill roll, and
It is an object of the present invention to provide a winding device for a film-like material, characterized in that it comprises a control means for causing a press roll to touch a mill roll in a soft manner.

The embodiments shown in the drawings will be described below.

2 is a front view of a film material winding device showing an embodiment of the present invention, FIG. 3 is a view taken in the direction of arrow A in FIG. 2, and FIG.
It is a front view showing an operating state different from the figure, and 6 is a film, 7 is a mill roll, 8 is a winding core, and 9 is a guide roll. Further, reference numeral 10 denotes a winding diameter detection roll, which is rotatably held by an arm 11, and the arm 11 can swing around a shaft 12 as a fulcrum. 13 is the shaft 1 that is integral with the arm
A balance weight 4 is held, and 15 is an air cylinder, the piston rod 16 of which is engageable with the arm 11.

17 is rotatably held by an arm 18 by a presser roll, and the arm 18 is swingable about a shaft 19 as a fulcrum.

20 is an air cylinder whose piston rod 21 is rotatably connected to the arm 18 with a pin.

Reference numeral 22 denotes a lever, one end of which is rotatably held by the shaft 12, the other end of which is rotatably pin-joined to one end of a connecting rod 23, and the other end of the connecting rod 23 is rotatably connected to the lower end of the arm 18. Connected with pins.

A cam 24 is integral with the arm 11 and is engageable with a limit switch 25 attached to the lever 22.

Next, to explain the operation, an empty core is supplied to a fixed winding position by a known method, the film 6 is cut by a cutter (not shown), and the core is removed by a presser roll 17.
After the end of the film is automatically wrapped around the presser roll 17,
stops away from the winding core 8.

Next, when the winding operation reaches a preset winding diameter, the piston rod 16 of the air cylinder 15 is retracted automatically or by an operation button (not shown) after visually checking the winding diameter, and the arm 11 is rotated by its own weight. It starts rotating around 12. In this way, the winding diameter detection roll 10 comes into contact with the mill roll 7. Next, the presser roll 17 begins to approach the mill roll 7 due to the action of the air cylinder 20, the limit switch 25 approaches the cam 24, and just before the presser roll 17 comes into contact with the mill roll 7, the cam 24 switches the limit switch 25 as shown in FIG. Therefore, the air cylinder 20
The air circuit (not shown) is switched from the high pressure side to the low pressure side for soft touch, and the presser roll 17 soft touch the mill roll 7. Immediately after the presser roll 17 is switched to soft touch, the piston rod 16 of the air cylinder 15 protrudes and engages with the arm 11, thereby separating the winding diameter detection roll 10 from the mill roll 7. Also, depending on the operation selection, after an empty core is supplied to a fixed winding position, the film 6 is cut with a cutter (not shown), and the film 6 is automatically wound around the core 8 with a presser roll 17. You may switch to soft touch immediately afterwards. As described in detail above, in the present invention, the pressure roll is separated from the mill roll at the beginning of winding of the film-like material, and the pressure roll is separated from the mill roll to prevent air entrainment. The film-like material to be wound onto the film-like material that has been rolled up is rolled up while being gently pressed by a pressure roll. There are no drawbacks such as making the mill roll harder than the required hardness or not being able to obtain the required roll shape, and there are no drawbacks such as making the mill roll harder than the required hardness or not being able to obtain the required roll shape. It is possible to obtain a winding appearance that is similar to that of the conventional one, and to significantly improve productivity in subsequent processes.

Furthermore, since the pressure roll is switched to soft touch just before it comes into contact with the mill roll, damage to the film material surface can be prevented. The present invention also prevents air from getting into the mill rolls using a device with an extremely simple structure that combines a four-bar link consisting of a fixed link and a dynamic link and a limit switch, and is an inexpensive device that is free from failure. The device is capable of achieving its intended purpose. The present invention can be applied to all thin plastic film winding machines.

[Brief explanation of drawings]

Figure 1 shows a conventional thin plastic film winder.
FIG. 2 is a front view of a film-like substance winding device showing an embodiment of the present invention, FIG. 3 is a view taken in the direction of arrow A in FIG. 2, and FIG. 4 is the same as in FIG. FIG. Explanation of the main parts of the figure, 6...Film, 7...
... Mill roll, 8 ... Winding core, 10 ...
... Winding diameter detection roll, 11 ... Arm, 12
...Axis (fulcrum), 17...Presser roll, 18...Arm, 19...Axis (fulcrum), 22...Luv 1 23...Connecting rod, 24...Cam, 25...Limit switch.

Claims (1)

[Scope of Claims] 1. When winding a film-like material onto a mill roll from the start to the end of the roll using the same driving source, after winding the film-like material around the mill roll to a predetermined winding diameter, the winding diameter of the mill roll is changed. While detecting with the winding diameter detection roll, the pressure roll is switched to soft touch in response to the movement of the arm for the detection roll, and the film-like material to be wound is pressed against the film-like material wound on the mill roll. A method for winding up a film-like substance, characterized by winding it up while being softly pressed by a roll. 2 A line connecting the rotation center of the winding diameter detection roll arm and the rotation center of the pressure roll arm is used as a fixed link, and a lever whose base is pivoted at the rotation center of the said link and the said winding diameter detection roll arm, and the same A four-bar link consisting of a connecting rod connecting the free end of the lever and the lower end of the pressure roll arm, the pressure roll arm, a limit switch attached to the lever, and the roll diameter detection roll. A cam member that is attached to the lower end of the arm and operates the limit switch just before the pressure roll comes into contact with the mill roll, and upon receiving a signal from the limit switch, detaches the winding diameter detection roll from the mill roll, and also moves the pressure roll into the mill roll. 1. A winding device for film-like material, comprising a soft touch control means.