JPH06143411A - Converging guide device for inflation film - Google Patents

Abstract

PURPOSE:To provide a converging guide device for an inflation film which enables remote control of the converging angle of the inflation film. CONSTITUTION:A pair of converging guides 4 positioned in the vicinity of the lower side of a receiving roll 2 and facing each other in the shape of generally inverted V are provided. The lower end part of each of these converging guides 4 is joined to a point scale 8 with an operating lever 7 interposed. The operating lever 7 can be moved so that an extension length can be changed by the point scale 8. Within a range of movement of the lower ends of the converging guides 4, a scale plate having scale divisions is provided. A detector 13 reading the scale of a position where the converging guide 4 is located faces this scale plate. The point scale 8 and the detector 13 are connected to a control device 14 and a gap is calculated from the read scale and displayed the gap value on a CRT 15, while the point scale 8 is controlled so that the gap be at a set value inputted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a focusing guide device for focusing a tubular inflation film into a sheet in an inflation film manufacturing apparatus.

[0002]

2. Description of the Related Art A conventional blown film focusing guide device is provided with a plurality of guide rolls pivotally supported in a ladder shape in the vicinity of the lower side of a take-up roll, and a pair of focusing guides facing each other in a substantially inverted V shape. Is equipped with. An upper end portion of the focusing guide is pivotally attached to the support frame so as to be rotatable by a predetermined angle, and lower end portions thereof are fixed to each other at a constant interval. A graduation plate is provided in the vicinity of the lower end of this focusing guide, and in order to adjust the focusing angle of the inflation film, the mutual interval of the lower ends is adjusted by visually checking the graduation.

[0003]

In the above-mentioned conventional apparatus, when changing the divergence angle of the focusing guide, it moves from the floor where the mold is installed to the upper floor where the focusing guide is provided, and There is the annoyance that the lower end must be set freely and reset. Therefore, an object of the present invention is to provide a focusing guide device for an inflation film, which can remotely control the focusing angle of the inflation film.

[0004]

In order to solve the above problems, in the present invention, a tubular inflation film is pulled up from a rotary mold and formed into a sheet by a take-up roll. In an inflation film focusing guide device provided, a plurality of guide rolls are pivotally supported in a ladder shape, and a pair of focusing guides are arranged to face each other in a substantially inverted V shape at intervals so that their mutual angles can be changed. A point scale for moving the removable operating rod connected to the lower end of the guide in the lateral direction, a scale plate for indicating the position of the lower end of the focusing guide, and a scale on which the focusing guide is located facing the scale plate. Calculate the interval from the detector to be read and the scale read by the detector, and set the interval to the previously entered interval. And a controller for controlling the Lumpur to constitute a focusing guide device blown film.

[0005]

In the blown film focusing guide device of the present invention, the detector reads the scale on the scale plate on which the lower end of the focusing guide is located, and the controller calculates the mutual distance between the focusing guides from this scale. Then, the operating rod is moved by the point scale so that the interval is set in advance, and the interval between the focusing guides is adjusted. When the default position of the operating rod is cleared due to a power failure, remove the operating rod from the focusing guide and adjust the position.

[0006]

Embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, in the inflation film manufacturing apparatus, the inflation film F extruded from the rotary mold 1 is pulled up by the take-up roll 2 via the focusing guide device 3 and guided by the plurality of guide rolls 4 to be the last. It is adapted to be wound up by the winding machine 5. The rotary mold 1 is filled with a molten film raw material inside, and while being horizontally rotated, the inflation film F is extruded into a tubular shape from the upper part thereof. The take-up roll 2 is located above the rotary mold 1 and pulls up the inflation film F.

As shown in FIGS. 2 and 3, the focusing guide device 3 is located in the vicinity of the lower side of the take-up roll 2 and has a pair of focusing guides 4 facing each other at an angle in a substantially inverted V shape. , 4
Is equipped with. The focusing guide 4 is axially supported by a pair of parallel frames 5 so that a plurality of guide rolls 6 are spaced apart from each other to form a ladder shape. The upper end of the focusing guide 4 is pivotally attached to a support frame (not shown) so as to be rotatable by a predetermined angle. The lower end is rotatably connected to the point scale 8 via the operating rod 7. The operating rod 7 is movable so that the extension length (a) can be changed by the point scale 8. As shown in FIG. 4, the operating rod 7 has a mounting shaft 9 and a mounting bracket 10 at the lower end of the frame 5.
Are connected via. The mounting bracket 10 has a receiving tube 10a into which the mounting shaft 9 is inserted. A bolt 10b is provided on the mounting member 10 so as to project, and is screwed to the operating rod 7 with a wing nut 11. A graduation plate 12 having a graduation 12a in the lateral direction is provided across the both focusing guides 4 and 4 in the range where the lower end of the frame 6 on one side of the focusing guide 4 moves. The scale plate 12 is provided with a detector 13 for reading the scale on which the lower end of the focusing guide 4 is located. The point scale 8 and the detector 13 are the control device 14
Electrically connected to. The control device 14 calculates the interval from the read scale and displays it on the CRT 15, and also controls the point scale 7 to the interval of the input set value.

In the inflation film focusing guide device 3, first, the length (a + a ') from the center between the focusing guides 4 and 4 to the point scale 7 is set and input to the control device 14. Then, the length (a ′) from the focusing guide 4 to the point scale 8 is read by the detector 13. Next, the controller 14 has a length (a ').
Is converted into a digital numerical value, and then the interval (a) between the focusing guides 4 and 4 is calculated and displayed on the CRT 15. Then, the operating rod 7 of the point scale 8 is moved so as to have the previously set interval, and the interval between the focusing guides 4 and 4 is adjusted.
When the initial setting position of the operating rod 7 is cleared due to a power failure, the wing nut 11 is removed, the bolt 10b is pulled out from the bolt insertion hole 7a of the operating rod 7, returned to the initial position, and then connected.

Naturally, the present invention is not limited to the above-described embodiments, and various modifications of the mode and the like made within the scope of the invention are also included in the scope of the present invention. For example, a thumbscrew and a nut may be used to connect the focusing guide 4 and the operating rod 7, and various other connecting means can be applied.

[0010]

As described above, in the present invention, in order to pull up a tubular inflation film from a rotary mold and form it into a sheet by a take-up roll,
In an inflation film focusing guide device provided in the middle of an inflation film, a plurality of guide rolls are supported by a plurality of guide rolls that are axially supported in a ladder shape, and are arranged to face each other in a substantially inverted V shape at intervals so that their mutual angles can be changed. The guide, a point scale for laterally moving the removable operating rod connected to the lower end of the focusing guide, a scale plate for indicating the position of the lower end of the focusing guide, and a scale plate facing the scale plate to guide the focusing guide. The detector for reading the scale on which the position is located, the interval is calculated from the scale read by the detector, and the focusing guide device for the inflation film is configured from the control device that controls the point scale to the interval input in advance. Without moving from the floor where the mold is installed to the upper floor where the focusing guide is installed, the inflation Can change the angle of convergence of the film, also has the effect of recovery to the initial state can also be performed easily by a power failure.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of a blown film focusing guide apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view of a blown film focusing guide device.

FIG. 3 is a front view of a blown film focusing guide device.

FIG. 4 is an exploded perspective view of a connecting portion of an operating rod.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rotary mold 2 take-up roll 3 focusing guide device 4 focusing guide 6 guide roll 7 operating rod 8 point scale 12 scale plate 12a scale 14 control device F inflation film

Claims (1)

[Claims] 1. An inflation film focusing guide device provided in the middle of an inflation film for pulling up a tubular inflation film from a rotary mold and forming it into a sheet by a take-up roll. In parallel with each other, a pair of focusing guides, which are axially supported and are arranged to face each other in a substantially inverted V shape at intervals so that the mutual angles can be changed, and a removable operating rod connected to the lower end portion of the focusing guides in the lateral direction. A point scale to be moved, a scale plate for indicating the position of the lower end of the focusing guide, a detector that faces this scale plate and reads the scale on which the focusing guide is located, and the interval is calculated from the scale read by the detector. And a control device for controlling the point scale at a pre-input interval. Focusing device for ration film.