JPH065862Y2 - Composite film manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an apparatus for manufacturing a composite resin film / sheet or the like (hereinafter simply referred to as a composite film) using a flat die.

(Prior Art) FIG. 9, FIG. 10 and FIG. 11 show an example of a conventional composite die adapter. In the figure, 61 is a known composite die, and 62, 63, 64 are connecting conduits connected to each extruder,
Molten resin extruded from each extruder 65, 66, 67 is made into a composite T-die.
It is for introducing into 61, one side is on the front of the extruder,
The other end is connected to the composite T-die 61 by the resin supply conduits 62 ', 63', 64 '.
It is fastened with a bolt or the like (not shown) via the.
The resins supplied to the composite T-die 61 from the supply conduits 62 ', 63', 64 'are spread in the width direction and then laminated and slit.
It is extruded from the outlet 69 via 68. Reference numerals 65, 66 and 67 are known extruders for kneading and extruding a resin for forming a sheet (or film).

Now, the molten resin extruded from the extruders 65, 66, 67 respectively,
From the connection conduit 62 to the resin supply conduit 62 ', from the connection conduit 63 to the resin supply conduit 63', and from the connection conduit 64 to the resin supply pipe 64 ', they are introduced into the respective inlets of the T die 61. And
The molten resin supplied to the T die 61 from the flow path 62a of one resin supply pipe 62 'enters the die manifold 62c through the introduction path 62b in the die, is expanded in the width direction, and is introduced into the slit 62d.

In addition, the flow paths 63a of the other two resin supply conduits 63 ', 64',
The respective molten resins introduced into the T die 61 from the 64a are introduced into the die manifolds 63c and 64c via the introduction passages 63b and 64b in the dies, respectively.
Enter into the slits 63d and 64d. The molten resin introduced into each slit 62d, 63d, 64d is laminated at the same time when it enters the common slit 68 in the die,
It is discharged from the die outlet 69 and is molded through the cooling roll 70.

(Problems to be solved by the invention) In such a composite film manufacturing apparatus using T-die,
There is an air gap (L ₀ dimension) as shown in FIG. 1, and when this air gap is large, it causes an increase in the neck-in amount, uneven thickness of the ears, instability of the molding of the ears, and the like. There is a need to minimize the air gap.

On the other hand, when the air gap is reduced, the film take-up angle α increases, and when it exceeds the limit, deterioration products occur due to resin retention at the die discharge port, which adheres to the film and loses its value as a product. Such problems occur.
In addition, depending on the type of resin to be discharged, there are cases in which the above-mentioned deteriorated substances become significantly attached unless the film take-off angle α is brought close to zero.

By the way, in the conventional composite die, FIGS.
As shown in the figure, the direction of the die 61 is fixed, and the adjustment of the air gap must depend solely on the position change of the cooling roll 70, and it is sufficient to obtain a desired air gap and take-off angle α. The current situation is that such adjustments cannot be made.

Therefore, the present invention is capable of optimally adjusting the take-up angle of resin even in a composite film manufacturing apparatus using a composite T die having a plurality of resin inlets, and an air gap between the die discharge port and the resin contact point of the cooling roll. It is intended to provide a structure of a composite T-die part that enables adjustment of the value to a proper value.

(Means for Solving the Problems) Therefore, the present invention has a plurality of conduits for molten resin and a plurality of molten resin inlets, and the molten resins introduced from the inlets are spread thinly and laminated. In a device for manufacturing a composite film consisting of a die for ejecting a laminated film from a long and thin ejection port and a cooling roll for cooling the laminated film ejected from the die, the die is centered on an axis parallel to the ejection port. It is configured such that it is rotatable and a part of the conduit is rotatable on the rotation axis of the die,
This is to solve the above problems.

(Operation) The die is rotated on the axis parallel to the discharge port, and the mounting angle is set arbitrarily. At this time, the die can be freely rotated with respect to the resin conduit, and the film take-up angle α can be optimally set. When this operation is combined with the operation of changing the position of the roll, it is possible to set a smaller air gap, and (1) decrease the neck-in amount (2) stabilize the molding (3) increase the thickness of the ears. Reduction (4) Reduces the adherence of deteriorated materials and enables stable molding.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

1 to 4 show the essential parts of a composite film manufacturing apparatus which is an embodiment of the present invention.

In these figures, 101 is a film discharged from a die 102, which is cooled and solidified by a cooling roll 103. The parts other than those shown have substantially the same structure as the conventional one. Fig. 2
The examples shown in (a) and FIG. 2 (b) are both of the present invention in which each resin supply conduit and / or connection conduit rotates on the same axis as the rotation axis of the die 102 and on the side of the die 102. A different embodiment is shown.

Here, the description will be centered on FIG.

A plurality of resin introduction ports 120, 121, 122 of the die 102 are provided on the width direction end side of the die 2, and the corresponding molten resin supply pipes 104, 105, 106 are provided.
Are attached to these openings and are each connected to respective connecting conduits 110, 111, 112 with the extruder. This connection is made by connecting the central resin supply pipe 104 to the opening of the resin inlet 120 via the loose flange 107, and connecting the other connecting conduits 111 and 112 to the loose flange 10.
Axis X to the corresponding resin supply pipes 105 and 106 via 8,109, respectively.
-Connect rotatably on X. Therefore, the resin flow paths of the latter two resin supply pipes 105 and 106 are formed by bending so as to be aligned with the resin flow path of the central resin supply pipe 104. Further, on the other end face in the width direction of the die 102, the axis line XX
The rotating shaft 118 is mounted on the upper side, and the rotating shaft 118 and the resin supply pipe 104 at the center are both mounted on the bearings 113 and 114 so that the die 102 itself can be rotated and fixed at an arbitrary position. That is, a fixing device (not shown) is attached to the bearings 113 and 114.

When adjusting the rotation angle of the die 102, the fixing device (not shown) for the bearings 113, 114 and the loose flanges 107, 108, 109 for mounting the resin supply pipe 104 and the connecting conduits 111, 112 are loosened and the die 102 is rotated to a predetermined position. After setting to the angle of, fix it again.

When the take-up angle α of the film 101 is made zero by this operation, when the die 102 is rotated as shown by the chain double-dashed line in FIG. 4, the connecting conduits 110, 111, 112, the supply pipes 104, 105, 106, etc. Molding is possible without allowing rotation of the die 102 and changing its position or exchanging a connecting conduit or the like.

At this time, if the air gap L becomes large and a problem such as flapping of the film 101 occurs, a cooling roll may be used as necessary.
Move 103 to shorten the air gap distance.

As described above, in the example shown in FIG. 2 (a), three kinds of resins are laminated to manufacture a three-layer composite film, but in the example shown in FIG. 2 (b), two kinds of resins are used. 11 is an example in the case of manufacturing a three-layer composite film using
Reference numerals 4,115 and 116 correspond to the portions 104, 105 and 106 in FIG. 2 (a), respectively.

The above two embodiments are examples in which the resin supply pipe or the connection conduit is connected to the end face in the width direction of the die 102 as described above, but the embodiments shown in FIGS. An example in which an inlet is provided in the upper part of the die 102, a resin supply pipe is connected to the inlet, and relative rotation at the connection portion of the resin supply pipe and the connecting conduit is performed on the same axis as the rotation axis of the die 102. Is.

In this embodiment, parts corresponding to those shown in FIGS. 1 to 4 are designated by the same reference numerals.

FIG. 5 is a plan view of an essential part of the device of the present embodiment viewed from above, FIG. 6 is a sectional view of an essential part of the device viewed from the front, and FIG. 7 is an enlarged view of an essential part of the device viewed from the side. FIG. 8 is a sectional view showing the state when the die 102 of the apparatus is rotated.

In the apparatus of this embodiment, a plurality of resin introduction ports 1 are provided on the upper surface of the die 102.
20, 121, 122 are opened on the same straight line, and resin supply pipes 104, 105, 106 are connected and fixed to the respective openings. The corresponding connecting conduits 1 are provided on the side surfaces of the upper end portions of the resin supply pipes 104, 105, 106.
End side surfaces of 10,111,112 are rotatably connected to each other. Then, the respective resin flow paths communicate with each other at the respective connection portions, and communicate with the respective resin flow paths of the die 102.

Further, at the upper widthwise ends of the die 102, the rotating shaft 118 is
The suspension 119 is fixed, and the rotary shaft 118 is a fixed bearing.
It is supported by 113, and its position of arrangement is on the same straight line as the connecting and rotating portion of each of the pipes.

Also in this embodiment, as in the embodiment shown in FIGS. 1 to 4, when the die 102 is rotated about the rotation shaft 118, the resin supply pipes 104, 105, 106 are also connected to the respective connection conduits 110. , 1
Rotate around the connection with 11,112. The rotation angle of the die 102 is adjusted by a fixing device (not shown) for the bearing 113 and the resin supply pipe 1.
Loosen a tightening bolt (not shown) for tightening 04, 105, 106 and the connecting conduits 110, 111, 112, rotating the die 102 about the rotation shaft 118, setting a predetermined angle, and then fixing it again.

Therefore, even in this embodiment, as shown in FIGS. 7 and 8, the take-up angle α of the film 101 can be made zero without replacing the parts, and the cooling roll 103 The take-up angle α and the air gap can be adjusted to appropriate values together with the movement adjustment.

(Effect of the Invention) According to the present invention as described in detail above, by rotating the die on the axis parallel to the discharge port, the mounting angle can be set arbitrarily, and at that time, the die can be attached to the resin conduit. The die can be rotated freely. Therefore, according to the present invention, it is possible to set the take-off angle and the air gap at the same time when forming a composite film, which is (1) decrease in neck-in amount, (2) decrease in ear wall thickness increase, and (3) die discharge. This will prevent the adherence of deteriorated materials at the outlet, etc. As a result, (1) the behavior of the film in the air gap will be stable,
It is possible to perform stable molding such as reduction in thickness variation.

(2) Since the neck-in amount is reduced and the thickness of the ear is not increased, the product width is increased and the yield is improved.

(3) Since the take-off angle α can be adjusted, the adherence of deteriorated substances at the die discharge port is reduced, and the production of defective products can be prevented and the quality can be improved.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an essential part of a typical embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1 showing a different conduit arrangement, and FIG. 3 is a sectional view taken along the line B- of FIG. B sectional view, FIG. 4 is a side view for explaining a changed state of the die angle according to the same embodiment, FIG. 5 is a plan view showing another embodiment of the device of the present invention, and FIG. 6 is C- of FIG. C sectional view, FIG. 7 is the same DD sectional view, FIG. 8 is a side view for explaining a changed state of the die angle according to the embodiment, and FIG. 9 is a plan view showing an example of a conventional composite film manufacturing apparatus. 10 is a side view of the same, and FIG. 11 is a sectional view taken along the line EE of FIG. Description of main parts of the figure 101 …… Film 102 …… Die 104,105,106,114,115,116 …… Resin supply (conducting) tube 107,108,109 …… Loose flange 110,111,112 …… Connecting conduit 118 …… Rotating shaft

Claims (1)

[Scope of utility model registration request] 1. A molten resin having a plurality of conduits and a plurality of molten resin inlets, and each molten resin introduced from the inlets is spread thinly and laminated, and discharged as a laminated film from a long and thin outlet. In a manufacturing apparatus for a composite film consisting of a die and a cooling roll for cooling a laminated film discharged from the die, the die is rotatable about an axis parallel to the discharge port, and the rotation axis of the die is An apparatus for producing a composite film, wherein a part of the conduit is rotatable on a line.