JPS6026976Y2 - Molding machine for film and other strips - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a forming machine for forming strips such as films, which can be applied to film forming machines, sheet forming plates, etc.

FIG. 1 is a schematic side view of a conventional horizontal drawing type machine for forming a strip of film or the like (hereinafter referred to as a film forming plate), and FIG. 2 is a sectional view taken along line XX in FIG. 1.

In the figure, reference numeral 1 indicates a guide from the outlet 2 to a strip 3 (such as a film).
The film 3 is wound around a cooling roll 4 and sent.

The cooling roll 4 is rotatably supported by a side plate (not shown), and its surface is processed to be smooth.

Reference numeral 5 denotes an air knife, which is configured as a box having an air jet slit (not shown) at the bottom, and has side plates 5a and 5b.

6 is a position adjustment device that moves the air knife 5 in the vertical direction (arrow A
), the front-rear direction (arrow B), and the inclination angle (arrow C). .

7 is a pipe, which is integrally connected to the air knife 5;
It is connected to a flexible hose 8 via a position adjustment device 6.

A blower 9 supplies compressed air to the air knife 5 via the flexible hose 8 and pipe 7.

Now, in FIG. 1, pressurized air is blown from an air knife 5 onto the molten film 3 extruded from the die 1, and the film 3 is molded into a uniform thickness while being cooled.

Here, when the conveyance speed of the molten film 3 increases, air is drawn in between the film 3 and the cooling roll 4, and the film 3
There is a risk that surging may occur due to the vibration of the bottom film, resulting in a defective bottom film (poor appearance, poor thickness in the machine direction, wrinkles, poor winding shape, etc.).

Conventionally, as a countermeasure against this problem, the air knife 5 is moved and adjusted as appropriate using a position adjustment device 6 shown in FIG. In addition to reducing entrainment, the air blowing was made uniform in the width direction of the film, but in the horizontal drawing method as shown in Fig. 1 (generally suitable for thick films), the air knife 5 is Contacting or colliding with the cooling roll 4 may damage the surface of the cooling roll 4, and therefore the operator must operate with extreme caution.

The present invention has been proposed in order to solve the above-mentioned conventional drawbacks, and includes providing guide members such as rotating rolls on both sides of the air knife so that the guide members can come into contact with both edges of the cooling roll. Therefore, it is an object of the present invention to provide a molding machine for forming strips such as films in which there is no risk of damaging the surface of a cooling roll with an air knife.

The embodiment of the present invention will be explained below with reference to the drawings. Fig. 3 is a sectional view of an embodiment of the device of the present invention and corresponds to Fig. 2, and Fig. 4 is a sectional view corresponding to Fig. 2.
The figures each show a view in the direction of the Y arrow in FIG.

In the embodiments shown in FIGS. 3 and 4, parts that are the same as those in the prior art are designated by the same reference numerals.

In the figure, 1 is a goo, 2 is an exit of the goo, 3 is a strip of film, 4 is a cooling roll, 5 is an air knife, and 5a and 5b are its side plates. It's the same.

Next, to explain the difference from the conventional one, reference numeral 11 is a guide member, which is constituted by rotating rolls 15, etc., and is attached to the base plate 12, which is fixed to the side plates 5a, 5b of the air knife 5 by welding or the like, with bolts 14, etc. The rotary roll 15 is attached to a bracket 13 that rotates.

That is, the shaft 17 is fixed to the bracket 13 with a nut 16.
The inner ring 15a of the rotary roll 15 is press-fitted into the inner ring 15a, and the outer ring 15b thereof is rotatably supported.

In addition, the lower end of the rotating roll 15 is always below the lowest end of the air knife 5 regardless of the position adjustment (vertical direction, front/back direction, inclination angle) of the air knife 5, and both edges of the cooling roll 4 are non-essential parts. It can come into contact with the portion 4a.

Next, to explain the effect as well as the operation, the air knife 5 is moved relative to the cooling roll 4 by appropriately adjusting the vertical and longitudinal directions and the inclination angle of the air knife 5 using a position adjustment device 6 (not shown in FIGS. 4 and 5). Even if the air knife 5 accidentally moves toward the cooling roll 15 during the contact/separation work, the guide member can be brought into contact with both edges of the cooling roll. Since the rotating roll rolls on the cooling roll in contact with both edges of the cooling roll, there is no risk of damaging the surface of the cooling roll (especially the mirror-finished part) with the air knife.

It goes without saying that both edges of the cooling roll described above may be constructed separately from the cooling roll.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an example of a conventional horizontal drawing type machine for forming strips of film, etc., Fig. 2 is a sectional view taken along line XX in Fig. 1,
FIG. 3 is a partially sectional front view of a molding machine showing an embodiment of the present invention, and FIG. 4 is a Y arrow diagram in FIG. Explanation of the main parts of the diagram, 1... Gui, 3...
...Band-like material such as film, 4...Cooling roll, 4
a...Both edges, 5...Air knife, 5
a, 5b...Side plates, (both sides of the air knife),
11... Guide member, 13... Bracket, 15... Rotating roll, 15a...
・Inner ring, 15b... Outer ring.

Claims (1)

[Scope of utility model registration request] A film forming machine using an air knife method for forming a strip of film or the like, characterized in that guide members made of rotating rolls or the like are provided on both sides of the air knife so that the guide members can come into contact with both edges of a cooling roll. Machine for forming uniform strips.