JPH11115047A - Apparatus for manufacture of film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To align both ends of a film flattened after inflation molding, and thereby allow it to be wound on a winding roller by setting a central part in the outer circumferential direction opposite to the rotational axis of deflection rollers to be in alignment with the rotational axis. SOLUTION: A film F is wound by the winding roller 23 of a winding machine 22. The deflection rollers 19b, 19d situated at the proximity of rotational axis RC among respective deflection rollers 19a, 19b, 19c, 19d are set to be in alignment with the rotational axis RC in its central part in the axial direction of the outer circumferential surface opposite to the rotational axis RC. These deflection rollers 19b, 19d are set to be in alignment with the rotational axis RC in its central axis in the axial direction of the outer circumferential surface opposite to the rotational axis RC. In this instance, concrete structures are such that, e.g. the deflection rollers 19b, 19d are supported at a crank-like rotating spindle rotating about the rotational axis RC, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film manufacturing apparatus, and more particularly, to a film manufacturing apparatus capable of winding a film which has been flattened after inflation molding and flattened on both ends.

[0002]

2. Description of the Related Art Conventionally, a tubular resin is formed by inflation molding in which a raw material resin such as a thermoplastic resin is melted in a heating cylinder of an extruder, extruded from a die by a screw, blown up and stretched biaxially. A film production apparatus is known which continuously forms a film of this type and flattens this tube-shaped film and winds the film around a winding roll.

FIG. 3 shows an example of this type of conventional film manufacturing apparatus. In a conventional film manufacturing apparatus 1, a hopper 3 attached to an upper surface of an extruder 2 is shown.
Is fed into the heating cylinder 4 of the extruder 2 from the heating cylinder 4 and melted inside the heating cylinder 4, and the heating resin 4 is rotated by a screw 6 rotated by a driving force of a driving source 5 such as a motor. And is extruded into a tube shape from the resin discharge port 10 of the die 9 through the head portion 7 and the joint portion 8 provided at the tip of the heating cylinder 4.

[0004] The molten raw resin R extruded from the die 9 is supplied from the compressor 11 to the resin discharge port 10.
The air blown and expanded in the biaxial direction by air or the like supplied to the inside through an air discharge port 12 provided inside, and is formed in an annular shape from a cooling blower 13 through a branch pipe 14. The film F is cooled by a cooling medium such as air supplied to the ring 15 to form a thin tubular film F. Then, this tubular film F
As is well known, a stabilizer 16 disposed so as to be capable of reversing and rotating 360 degrees around a rotation axis RC located on an extension of the central axis of the tubular film F, and a pair of members that reversely rotate together with the stabilizer 16. By being pinched by the pinch roll 17 composed of the rolls 17a and 17a, the pinch roll 17 is flattened in a state where its thickness is made uniform in the circumferential direction. At least one of the pinch rolls 17 can be driven to rotate by a motor 18. By changing the rotation speed of the motor 18, the take-up speed of the flattened film F can be changed. ing.

[0005] The flattened film F picked up by the pinch roll 17 is
Similarly to the above, a plurality of, for example, four deflecting rolls 19a, 19b, 19 are disposed so as to be capable of reversing rotation about the rotation axis RC.
c, 19d, a delivery guide roll 2 composed of a pair of rotatable rolls 20a, 20a fixed in position.
0, and then guided by an appropriate number of guide rolls 21 (only some of which are shown) arranged at appropriate locations to reach a winder 22, and formed into a roll by a windup roll 23 of the winder 22. It is wound.

The turning rolls 19a, 19b, 19
c and 19d are arranged at predetermined positions separated from the rotation axis RC such that their respective axial directions are located on a plane orthogonal to the rotation axis RC. Each of the turning rolls 19a, 19b, 19c, and 19d has a control (not shown) having a position closest to the delivery guide roll 20 around the rotation axis RC and being parallel to each other when viewed from above as an initial position. The rotation is controlled by the unit.

The turning rolls 19a, 19b, 19c,
19d will be further described.

The turning roll 19a shown at the bottom in FIG. 3 following the pinch roll 17 first rotates 180 degrees clockwise from an initial position on a predetermined orbit around the rotation axis RC from the initial position. 4 (a) moves to the rotation origin position shown by the broken line to the right, and then starts rotating from the rotation origin position at least in the production operation state as shown by the double-headed arrow A in FIG. 4 (a). It is controlled so as to be able to reverse 360 degrees on a predetermined orbit separated from the axis RC.
The stabilizer 16 and the pinch roll 17, which rotate together with the turning roll 19a, are controlled in the same manner.

FIG. 3 subsequent to the turning roll 19a
First, the deflecting roll 19b shown second from the bottom first rotates, for example, 135 degrees clockwise from the initial position on a predetermined trajectory around the rotation axis RC and changes to a broken line in the upper part of FIG. Then, at least in the production operation state, the position between the rotation origin position and the maximum rotation position indicated by the broken line in the lower part of FIG. As shown by, a predetermined orbit separated from the rotation axis RC is controlled to be capable of reversing rotation by 270 degrees.
The rotation origin position indicated by a broken line in the upper part of FIG. 4B and the rotation maximum position indicated by a broken line in the lower part of FIG.
(B) They are symmetrically positioned with the center line shown in the left-right direction as the plane of symmetry.

Further, FIG. 3 following the turning roll 19b
First, the deflecting roll 19c shown third from the bottom first rotates, for example, 90 degrees clockwise from the initial position on a predetermined trajectory around the rotation axis RC to form a broken line in the upper part of FIG. Then, at least in the production operation state, between the rotation origin position and the rotation maximum position shown by the broken line below in FIG. As shown by, a predetermined orbit separated from the rotation axis RC is controlled to be able to reversely rotate by 180 degrees. 4 (c) and the rotation origin position indicated by a broken line in FIG.
(C) The rotation maximum position indicated by the broken line below is shown in FIG.
(C) They are symmetrically positioned with the center line shown in the left-right direction as the plane of symmetry.

The turning roll 19d, which is located at the uppermost position in FIG. 3 following the turning roll 19c, that is, on the downstream side in the running direction of the flattened film F, first has a predetermined position around the rotation axis RC. 4D is rotated clockwise, for example, 45 degrees from the initial position, and moves to the rotation origin position shown by the broken line in the upper part of FIG. 4D, and thereafter, at least in the production operation state, the rotation origin position and FIG. (D) As shown by a double-headed arrow D in FIG. 4D, a portion between the rotation maximum position indicated by the broken line below and a predetermined track separated from the rotation axis RC can be rotated by 90 ° in a reverse direction. Is controlled. Note that the rotation origin position indicated by a broken line in the upper part of FIG.
The rotation maximum position indicated by a broken line below is symmetrically positioned with the center line shown in the left-right direction in FIG.

Further, the deflecting rolls 19a, 19
b, 19c and 19d, when the rotation angle of the deflecting roll 19a is 2X, the deflecting roll 19b is X + (X / 2),
The deflecting roll 19c is X, and the deflecting roll 19b is X- (X /
The rotation is reversed around the rotation axis RC with a rotation ratio of 2).

The two deflecting rolls 19a and 19c shown at the bottom in FIG. 3 and the third from the bottom in FIG.
The two deflecting rolls 19b and 19d, which are formed so as to be rotatable in the circumferential direction and which are the second from the bottom in FIG. 3 and the uppermost in FIG. 3, are large in order to prevent the film from wrinkling. The diameter is fixed, and the film F is fixed so as not to rotate in the circumferential direction in order to prevent the film F from moving in the axial direction.

[0014]

However, in the conventional film manufacturing apparatus 1 described above, the rotation axis RC
The film F formed by the inflation molding is circumferentially rotated by a stabilizing plate 16 which is disposed to be capable of reversing and rotating by 360 degrees around a circle and a pinch roll 17 composed of a pair of rolls 17a and 17a which reversely rotate together with the stabilizing plate 16. A plurality of diverting rolls 19a, 19, which are scattered in the same direction and have a uniform thickness in the circumferential direction and then flattened, and the flattened film F is arranged to be able to reversely rotate around the rotation axis RC.
The pinch roll 17 and each of the deflecting rolls 19a, 19b, 19c, can be delivered to the delivery guide roll 20 whose position is fixed by b, 19c, 19d.
19d is rotated in the reverse direction, so that the positions of both ends called ears and the like of the flattened film F are changed to the delivery guide roll 2.
For example, the film F is shifted (meandering) so as to reciprocate by about 3 cm in the axial direction on the upper side, and as a result, both ends of the film F wound in a roll by the winding roll 23 of the winding machine 18 become uneven. There was a problem.

As described above, when both ends of the flattened film F wound around the take-up roll 23 become irregular, for example, the both ends of the flattened film F are automatically cut to form a sheet-like film F. It will be difficult to
Flattened film F once wound on take-up roll 23
It is common practice to rewind the film F flattened on another winding roll using a known dedicated winding device (not shown) so that both ends of the flattened film F are aligned. As a result, the dedicated winding device is used. However, there is a problem that an installation space is required and a great economic burden is required. As another method of aligning both ends of the flattened film F wound on the take-up roll 23, a running position of both ends of the flattened film F called EPC is restricted before the take-up roll 23. Although there is a method using a known travel position correcting device, there is a problem that even when such a travel position correction device is used, an installation space is required and a great economic burden is required.

Therefore, the winding roll 23 is formed by aligning both ends of the film F flattened after the inflation molding.
There has been a demand for a film device that can be wound around a film.

The present invention has been made in view of these points, and an object of the present invention is to provide a film manufacturing apparatus capable of winding both ends of a flattened film after inflation molding and winding the same around a take-up roll. Aim.

[0018]

Means for Solving the Problems In order to achieve the above-mentioned object, the present inventors have made intensive studies and have studied the rotating shaft of a turning roll, which is disposed in the vicinity of the rotation axis among a plurality of turning rolls. When the phase difference in the reversal direction occurs in a series of rolls from the pinch roll to the delivery guide roll due to the reversal rotation of the outer peripheral surface facing the center on the orbit separated from the rotation axis, the rotation axis With respect to the film wound on the deflecting roll disposed near the center, a component force is generated to move the position of the deflecting roll wound in the axial direction, and finally the film is wound. The present invention has been completed by investigating that irregularities in the position are derived.

That is, a feature of the film manufacturing apparatus according to the present invention described in claim 1 is that the film-forming apparatus is located on an extension of the central axis of the tubular film which is formed by flattening the tubular film formed by inflation and taking it. And a pair of pinch rolls, one of which is rotatably driven around a rotation axis to be rotated, and a pair of pinch rolls rotatably driven around the rotation axis following the pinch roll. A plurality of diverting rolls provided, a delivery guide roll following these deflecting rolls, and a take-up roll for winding the flattened film into a roll via a plurality of guide rolls following the delivery guide roll. In the film manufacturing apparatus, the rotating shaft of the plurality of turning rolls is opposed to the rotation axis of the turning roll disposed near the rotation axis. That the central portion in the axial direction of the outer peripheral surface, in that arranged so as to coincide with the rotation axis. By adopting such a configuration, it is possible to control both ends of the flattened film to pass through a predetermined position on the delivery guide roll, and as a result, the film is wound around the take-up roll in a roll shape. Both ends of the flattened film can be aligned.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings.

FIGS. 1 and 2 show an essential part of an embodiment of a film manufacturing apparatus according to the present invention.
FIG. 2 is a schematic configuration diagram, and FIG. 2 is an explanatory diagram showing a relationship between a turning roll disposed near the rotation axis and the rotation axis.

As shown in FIG. 1, the film forming apparatus 25 of the present embodiment has an extruder 2.
Is provided with a heating cylinder 4 for melting the raw material resin R. Inside the heating cylinder 4, a screw 6 for transporting the raw material resin R is provided.
The screw 6 is rotatable with the driving force of a drive source 5 such as a motor disposed on the right side in FIG. That is, by rotating the screw 6 with the driving force of the drive source 5, the raw resin R is transported from the right to the left in FIG. 1, and the raw resin R is transferred by the heating cylinder 4 during the transportation. The raw material resin R which is heated to a predetermined temperature to be in a molten state and is melted to be in a liquid state is extruded from the tip of the heating cylinder 4.

On the upper surface of the heating cylinder 4 near the rear end shown on the right side in FIG. 1, a hopper 3 as a raw material resin supply means for supplying the raw material resin R into the heating cylinder 4 is attached. ing.

At the tip of the heating cylinder 4 of the extruder 2, a head 7 for guiding the molten raw material resin R upward is provided. Is provided with a die 9 via a joint portion 8. The die 9 is provided with a resin discharge port 10 formed in a substantially annular shape in a plane for extruding the raw material resin R in a molten state into a tube shape. The die 9 is provided with an air discharge port 12 inside the resin discharge port 10. As is well known, the air discharge port 12 discharges the air supplied from the compressor 11 into the molten raw material resin R discharged in a tubular shape from the resin discharge port 10 and extends in the biaxial direction. This is for forming a thin tubular film F.

Above the die 9, a cooling medium such as air is discharged toward the outer peripheral surface of the tubular film F to cool the tubular film F. Is provided, and a cooling medium such as air is supplied from a cooling blower 13 to an air ring 15 via a branch pipe 14.

Further above the die 9, as is well known, a stabilizer 16, which is disposed so as to be capable of reversing 360 ° around a rotation axis RC located on an extension of the central axis of the tubular film F, and A pinch roll 17 composed of a pair of rolls 17a, 17a that rotates integrally and reversely with the stabilizer 16 is provided. The reason why the stabilizer 16 and the pinch roll 17 can be rotated by 360 degrees is as follows.
As is well known, this is for making the thickness of the film F which has been cooled and made into a thin tube shape uniform in the circumferential direction. The pinch roll 17 is flattened so as to sandwich the cooled and thin film F, and is taken out. The pinch roll 17 can be rotationally driven by a motor 18 as a control means. By changing the rotation speed of the film F, the rotation speed of the pinch roll 17 can be changed to control the take-up speed of the film F.

Further above the die 9, that is,
Above the pinch roll 15, similarly to the pinch roll 17, four turning rolls 19a, 19b, 19c, and 19d are disposed so as to be able to rotate around the rotation axis RC in reverse. The turning roll 19 shown at the top in FIG.
To the left of D, a pair of rotatable rolls 20a, 20a
Is fixedly disposed.

The film F that has passed through the delivery guide roll 20 is guided by an appropriate number of guide rolls 21 (only some of which are shown) arranged at appropriate locations, and reaches a winder 22. It is configured to be wound in a roll shape by a winding roll 23.

Each of the turning rolls 19a, 19b, 19
As shown in FIG. 2, the turning rolls 19b and 19d, of which the rotation axis RC is located in the vicinity of the rotation rollers RC and 19d, have an axial center CP on the outer peripheral surface facing the rotation axis RC. It is provided so as to coincide with the axis RC. These turning rollers 19b and 19d are connected to the rotation axis RC.
As a specific configuration provided in such a manner that the axial center portion CP of the outer peripheral surface facing the rotating shaft coincides with the rotation axis RC, the turning rollers 19b and 19d rotate around the rotation axis RC. And the like, which is supported by a rotating shaft (not shown).

Further, each turning roll 19a, 19b, 19
The portions related to the reverse rotation of c and 19d are the same as those in the related art, and the detailed description is omitted.

Further, of the pair of rolls 20a, 20a constituting the delivery guide roller 20 in the present embodiment, one of the rolls 20a shown on the left side of FIG. 19a, 19b, 19c,
The turning rolls 19a and 19c which reversely rotate on the orbit separated from the rotation axis RC among the turning rolls 19d are arranged above the initial positions, that is, at the same position on the plane.

The other configuration is the same as that of the conventional one, so that the detailed description is omitted.

Next, the operation of the present embodiment having the above-described configuration will be described with reference to FIGS.

According to the film manufacturing apparatus 25 of the present embodiment, similarly to the conventional case, the stabilizer 16 disposed so as to be capable of reversing 360 degrees around the rotation axis RC, and integrally reversingly rotating together with the stabilizer 16. A pair of rolls 17a, 17a
With the pinch roll 17 made of, the uneven thickness of the inflation-molded film F can be scattered in the circumferential direction to make the thickness uniform in the circumferential direction and then flatten.

Then, the film manufacturing apparatus 2 of the present embodiment
According to No. 5, each turning roll 19a, 19b, 19c, 1
As shown in FIG. 2, the axial center portion CP of the outer peripheral surface of the turning rolls 19b and 19d facing the rotation axis RC of the turning rollers 19b and 19d, which is located in the vicinity of the rotation axis RC among the rotation shafts 9d, RC, so that the position of the central portion in the width direction orthogonal to the running direction of the film F finally delivered from the turning roll 19d always matches the rotation axis RC. It travels toward the fixedly arranged delivery guide roll 20. Then, the film F passing on the delivery guide roll 20 always passes a predetermined position on the delivery guide roll 20 at the center portion in the width direction orthogonal to the running direction of the film F. Thereby, it is possible to control both ends of the flattened film F to pass through a predetermined position on the delivery guide roll 20, and as a result, the flattened film F wound around the winding roll 23 in a roll shape is obtained. Can be reliably and easily aligned at both ends.

The film manufacturing apparatus 25 of the present embodiment
According to this, both ends of the flattened film F wound in a roll shape on the winding roll 23 can be aligned, so that the flattened film F once wound on the winding roll 23 is a known dedicated There is no need to rewind the film F flattened by using the winding device so that both ends of the film F are aligned with each other, so that a space for installing a conventional dedicated winding device is required, and a great economic burden is required. Can be prevented from occurring.

Further, the film manufacturing apparatus 2 of the present embodiment
According to No. 5, since both ends of the flattened film F wound in a roll shape on the winding roll 23 can be aligned,
For example, when the sheet F is formed by cutting both ends of the flattened film F automatically, the sheet-shaped film F can be formed by using the wound winding roll 23 as it is. Also, the efficiency of various operations in the post-process can be improved.

It should be noted that the present invention is not limited to the above-described embodiment, but can be variously modified as needed.

[0039]

As described above, according to the film manufacturing apparatus of the present invention, it is extremely excellent that both ends of a flattened film can be easily and surely aligned and wound on a take-up roll. It works.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a main part of an example of an embodiment of a film manufacturing apparatus according to the present invention.

FIG. 2 is an explanatory diagram showing a relationship between a turning roll and a rotation axis disposed near the rotation axis in FIG. 1;

FIG. 3 is a schematic configuration diagram showing an example of a conventional film manufacturing apparatus.

4A and 4B are explanatory diagrams showing a reversing state of a turning roll of the film manufacturing apparatus of FIG. 3, wherein FIG. 4A shows a turning roll following a pinch roll, FIG. 4B shows a turning roll following FIG. ) Is a turning roll following (b), and (d) is a turning roll following (c).

[Explanation of symbols]

Reference Signs List 2 extruder 3 hopper 4 heating cylinder 6 screw 9 die 10 resin outlet 12 air outlet 15 air ring 16 stabilizer 17 pinch roll 19a, 19b, 19c, 19d turning roll 20 sending guide roll 23 winding roll 25 film manufacturing apparatus R Raw material resin F Film RC Rotation axis CP Center (in the axial direction of the outer peripheral surface facing the rotation axis of the turning roll)

Claims (1)

[Claims] 1. A guide plate disposed so as to be capable of reversing rotation about a rotation axis located on an extension of a central axis of a tubular film which is flattened and taken up from an inflation-molded tubular film. A pair of rotatably driven pinch rolls, a plurality of deflecting rolls disposed following the pinch rolls so as to be capable of reversing rotation about the rotation axis, a delivery guide roll following these deflecting rolls, and the delivery A winding roll for winding the flattened film into a roll via a plurality of guide rolls subsequent to the guide roll, wherein the winding roll is disposed in the vicinity of the rotation axis of the plurality of turning rolls. The axial center of the outer peripheral surface facing the rotation axis of the turning roller is provided so as to coincide with the rotation axis. Film production apparatus.