JP2001314796A - Observable roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll capable of observing a contact state of a molten plastic extruded from a metal mold with the roll at a practical molding opera tion, excellent in the precision of the roll outside diameter and the precision of the rotation and capable of coating with the coating thickness of several ten μm. SOLUTION: The observable roll is formed by providing a hollow metallic roll provided with plural transparent windows on the outer peripheral part and pivotally supported freely rotatably and a photographic equipment for photographing the contact state of the film like material with the outer peripheral surface of the roll or the coating state of the coating agent on the surface of the film or the like traveling on the roll surface through the transparent window by a camera with light source fixed to and arranged on the hollow part, in a roll for forming a film like material by discharging a molten plastic from the metallic mold or a roll for applying coating agent or the like from a coating die on the surface of a film or the like travelling on the roll surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a film or sheet (hereinafter referred to as "film") by discharging molten plastic from a mold or applying a coating agent from a coating die to a surface of a film or the like traveling on a roll surface. More particularly, the present invention relates to a visualization roll for observing a contact state of a film or the like on a roll or a coating state of a coating agent on a film or the like and recording the observation.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, a situation in which a molten plastic 2 discharged from a mold 1 is formed into a roll 3 is described from a position of a camera 4a or 4b provided between the mold 1 and the roll 3. Observed and recorded. That is, the mold 1 for discharging the molten plastic 2 has a high temperature, and since the mold 1 and the roll 3 are installed close to each other, the installation place of the camera is small, and a small special camera is required. Had a CCD camera 4 installed away from the mold 1 and the roll 3.

As shown in FIG. 5, when a coating agent 7 from a coating die 6 is applied to a film 5 running on the outer peripheral surface of a roll, the roll 8 is made of glass or transparent plastic.
A camera 9 is provided inside to observe whether the coating agent 7 is applied uniformly or at a predetermined location.

[0004]

However, in the former case, the camera is located at a position away from the mold and the roll, and the actual molding state cannot be observed well. In the latter, although the coating state of the coating agent 7 applied to the film 5 can be seen well, the roll made of glass or transparent plastic has poor outer diameter accuracy and rotation accuracy, and the coating thickness of several tens μm or less is required. If you do, it was not suitable.

It is an object of the present invention to observe the contact state of the molten plastic discharged from the mold at the actual molding position on the roll surface, to achieve a good roll outer diameter accuracy and a high rotational accuracy, and to obtain a coating thickness of several tens of μm. The object of the present invention is to provide a roll that can be applied as follows.

[0006]

According to the present invention, there is provided a roll for forming a film by discharging molten plastic from a mold and having a plurality of transparent windows provided on an outer peripheral surface thereof. And a photographing device for photographing the state of contact of the film-shaped object with the roll outer peripheral surface through a transparent window by a camera with a light source fixed and installed in the hollow portion. It was a visualization roll.

A coating die for applying a solvent or the like to the surface of the film-like material is used instead of a mold for discharging molten plastic,
A visualization roll characterized in that the application state of the coating agent applied to the surface of the film was photographed through a transparent window.

[0008] Further, it is preferable to use a visualizing roll characterized in that photographing by a camera is performed every time the film passes through a photographing place where the transparent window of the rotating roll is fixed.

According to the present invention, the camera is fixedly installed in a hollow metal roll, is not affected by high temperature, the state of contact of the film with the roll can be observed, and not only can the photographing be performed, but also the roll is made of metal. As a result, even when a coating agent having a size of several tens of μm or less was applied to the film, the state was well observed and the photographing was possible.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the description, the same members as those in the conventional example will be denoted by the same reference numerals, and description thereof will be omitted, and only newly added members will be denoted by new numbers and will be described. The metal hollow roll 10 is provided with a plurality of glass or plastic transparent windows 11 on the outer peripheral surface. The roll 10 is rotatably supported at both axial ends by bearings 12 and 13, and is driven to rotate by a motor 14. In the hollow portion 15 of the roll 10, an inner cylinder 16 having the same axis as the roll 10 is fixedly installed so as not to rotate despite the rotation of the roll 10.

An endoscope 18 attached to a camera 17 is inserted into the inner cylinder 16 from the opposite end to which the motor 14 is attached, and is inserted through a hole 20 provided in the inner cylinder 16 through an eye 19 at the distal end. The contact state of the film outside the transparent window 11 provided on the outer peripheral surface of the roll with the roll or the application state of the coating agent to the film can be seen, observed, and photographed.

The above-described camera 17 is described as an example in which the camera 17 is outside the roll 10 and the outside of the transparent window 11 is viewed by the endoscope 18. However, the present invention is not limited to this, and the camera is directly fixed in the roll. It doesn't matter. Transparent window 1 with camera
It is more effective to photograph the outside of the camera 1 by applying a position signal from the tachometer 21 for measuring the rotation speed to the camera 17 so that photographing is performed every time the transparent window passes in front of the photographing location.

[0013]

As described above, in the present invention, the camera or the eyes of the camera are fixedly installed in the hollow metal roll, and are not affected by high temperature, and the state of contact of the film with the roll can be observed. In addition to taking pictures, the roll is made of metal, unlike glass or plastic, and can be processed with high precision, so even when a coating agent of several tens of μm or less is applied to the film, the state is well observed. , Shooting became possible

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a visualization roll showing one embodiment of the present invention.

FIG. 2 is an explanatory view of a visualizing roll showing one embodiment of the present invention, and is a cross-sectional view taken along the line AA of FIG. 1 showing a state in which a film is observed in contact with the roll and an image is taken.

FIG. 3 is an explanatory view of a visualizing roll showing one embodiment of the present invention, and is a cross-sectional view taken along the line AA of FIG. 1 showing a case where an application state of a coating agent on a film is observed and photographed.

FIG. 4 is an explanatory diagram showing a state in which the state of contact with a roll of a conventional film is observed and photographed.

FIG. 5 is an explanatory diagram of a visualization roll showing a case where the state of application of a coating agent on a conventional film is observed and photographed.

[Explanation of symbols]

 Reference Signs List 1 mold 2 molten plastic 5 film 6 coating die 7 coating agent 10 hollow roll 11 transparent window 12, 13 bearing 14 motor 15 hollow portion 16 inner cylinder 17 camera 18 endoscope 19 eye 20 hole 21 tachometer

Claims (3)

[Claims] 1. A roll for discharging a molten plastic from a mold to form a film-like material, comprising: a rotatably supported hollow metal roll having a plurality of transparent windows on an outer peripheral surface; A visualization roll comprising: a photographing device for photographing a state of contact of a film-like object with an outer peripheral surface of a roll through a transparent window by a fixedly installed camera with a light source. 2. A coating die for applying a solvent or the like to the surface of a film-like material instead of a mold for discharging molten plastic, and a coating state of the coating agent applied to the surface of the film-like material is changed through a transparent window. The visualization roll according to claim 1, wherein the visualization roll is observed and photographed. 3. The image pickup apparatus according to claim 1, wherein the photographing by the camera is performed every time the sheet passes through a photographing place where a transparent window of a rotating roll is fixed.
Visualization role as described.