KR100506347B1 - High speed Processing instrument for plastics film - Google Patents

Abstract

The present invention relates to a plastic film high speed processing apparatus capable of quantitatively evaluating the shaking property, pullability, neck-in, stretch resonance, fracture, and the like of a plastic material,

An extruder connected to an extrusion die; A cooling roll which stretches and quenchs the semi-molten plastic resin discharged from the extrusion die to form a plastic film; A camera device for photographing the shape of the plastic resin that is disposed between the extruder and the cooling roll and drawn; A plurality of guide rolls for guiding the film transferred from the cooling roll; A winding device for winding up the film passed through the cooling roll and the guide roll; Since the processing unit for processing the data transmitted from the camera device to calculate the physical properties of the plastic film;

It is possible to obtain the product property information more accurately and easily to determine the optimum processing conditions of plastic materials by storing the continuous change of the stretched molten resin as an image, and storing it as a file and automatically processing it by a computer system. It works.

Description

High speed processing instrument for plastics film

The present invention is a plastic film high-speed processing capable of quantitatively evaluating the shaking, pullability, neck-in, stretch resonance, fracture, etc., which are the most important factors when the plastic material is extruded into a film form or manufactured. Apparatus, in detail, when discharging a plastic material melted at a high temperature into the film through an extruder, by measuring the shakeability, pullability, neck-in of the plastic resin according to the stretching speed continuously, The present invention relates to a processing apparatus designed to determine or simulate the processing conditions.

Important considerations in processing processes such as extrusion coating of plastic materials and high-speed stretching processes include neck-in properties, pullability, and shaking properties of plastic materials. This is because these characteristics greatly affect the processing characteristics of the plastic film.

In the case of neck-in, when the resin discharged from the extrusion die is coated on the substrate, the actual width decreases compared to the die width. This phenomenon causes a thick film on both sides and adversely affects production. You have to control it.

In addition, in the case of the drawability, the extruded molten polymer is oriented in the stretching direction when the plastic material is blown, cast film or extrusion coated, whereby the production processability depends on the degree of pulling. In addition, breakage, resonance, neck-in, etc. may occur depending on the pulling speed. Therefore, the optimum processing speed should be determined.

In addition, the shaking property refers to a property in which the resin discharged from the die and drawn is shaken from side to side and stretched. The shaking property also has a great influence on the workability of the plastic material. It is important.

Fig. 1 shows a schematic configuration of a conventional plastic film high speed processing apparatus, and Fig. 2 shows the main parts thereof.

As shown, a conventional processing apparatus includes an extruder 1 to which an extrusion die 1 'is connected;

An air injector (2) for injecting air into the semi-molten plastic resin (100) discharged from the extrusion die (1 ') to induce primary cooling crystallization; A cooling roll 3 for quenching and stretching the extruded resin into a plastic film 200; A guide roll 4 and a winding roll 5 for guiding and guiding the film 200 transferred from the cooling roll 3; A winding device 6 and a driving device 9 for winding the plastic film 200 passed through the cooling roll 3, the guide roll 4, and the winding roll 5; A sensing device 7 for sensing the shape of the stretched film 200 to automatically observe the neck-in and pullability of the film; Computer system 8 incorporating software capable of receiving a signal from the sensing device 7 and processing it in two dimensions to produce a result.

However, in the above apparatus, as illustrated in FIG. 2, the necking-in of the material 200 which has already been plasticized into a film is formed by the sensing device 7 disposed between the cooling roll 3 and the guide roll 4. The force was observed, and the neck-caused pullability of the semi-molten resin 100 which substantially affects the film could not be observed. That is, the greater influence on the processability of the plastic film as the final product is the neck-in pullability of the semi-melt resin first discharged from the extrusion die 1 ', while the conventional apparatus could not measure this. There was a problem that the shaking property of the resin could not be measured at all.

In addition, the conventional sensing device is composed of a general camera that can take images one by one, there is a disadvantage that is not suitable for measuring the neck-in, pullability and shakeability of the resin stretched continuously and shaken.

The present invention has been made in order to improve the above problems, plastic film high-speed processing apparatus that can continuously and accurately evaluate the properties of the neck-in, pull out, shake, etc. through extrusion, high-speed processing, stretching of the plastic The purpose is to provide.

In order to achieve the above object, the plastic film high-speed mill of the present invention, the extruder is connected to the extruder; A cooling roll which stretches and quenchs the semi-molten plastic resin discharged from the extrusion die to form a plastic film; A camera device for photographing the shape of the plastic resin that is disposed between the extruder and the cooling roll and drawn; A plurality of guide rolls for guiding the film transferred from the cooling roll; A winding device for winding up the film passed through the cooling roll and the guide roll; A processor configured to process data transmitted from the camera device to calculate physical properties of the plastic film;

Characterized in that comprises a.

It is preferable that the said camera apparatus is what is called a CCD camera apparatus. In addition, the camera device is preferably movable up, down, left and right.

On the other hand, the cooling device 30, the support body (40) is supported on the guide roll (40, 50) is also good to move up, down, left and right.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

3 is a schematic configuration diagram of a plastic film high speed processing apparatus of the present invention, Figure 4 is a view showing the main part of the apparatus shown in FIG.

Referring to FIG. 3, an extruder 10 is provided in the present processing apparatus in order to pull the plastic molten resin 100 at a high speed onto a film at a high temperature. An extrusion die 10 'is provided at one end of the extruder, from which the plastic resin 100 in a semi-molten state is discharged onto the film. The temperature of the extrusion die 10 'is about 180 to 320 degreeC.

In the apparatus main body S under the extrusion die 10 ', a cooling roll 30 for stretching and cooling the plastic semi-molten resin 100 is provided so that the roll space can move freely. In this embodiment, although two cooling rolls are provided, it can also be installed in the number more than that considering the kind and length of a plastic resin, cooling efficiency, etc.

A cooling device (not shown) is built in the central axis of the cooling roll 30 so as to keep the temperature of the roll surface constant. The cooling device includes a cooling water inlet line and cooling water in which process cooling water is introduced and discharged, respectively. It may be configured as an exit line. On the other hand, as the surface material of the cooling device, a non-ferrous metal material coated with chromium, nickel, molybdenum or the like is preferable. In addition, the surface of the roll may be polished in a half mirror type so that minute irregularities may be uniformly formed on the surface, thereby preventing the film 200 from adhering to the roll and pulling out at a high speed. As for the temperature of the cooling roll 30, 0-20 degreeC is suitable.

In addition, between the extrusion die 10 'and the cooling roll 30, the camera device 20 for photographing the shape of the plastic resin 100 discharged and stretched from the extrusion die 10' is lifted up and down ( 21) the lifting is freely installed. The camera device 20 may be installed on the device body (S), as shown, may be installed on a support separate from the device body.

A plurality of guide rolls 40 and 50 are disposed at the rear of the cooling roll 30. In this embodiment, the winding drive device M is installed in the rearmost guide roll 50 of the guide rolls to draw and guide the film 200 continuously.

The cooling roll 30 and the guide rolls 40 and 50 are mounted in the apparatus main body S, and the plastic film 200 discharged from the guide roll and exiting the apparatus main body S is wound up by the winding apparatus 60. do.

The upper end of the device body (S), by using the data transmitted from the camera device 20, the characteristics affecting the processing characteristics of the plastic film, such as the pull property, neck-in, stretching resonance phenomenon, fracture, shaking properties of the plastic material There is installed a computer system 80 in which software for quantitatively evaluating them is embedded. 81 is a control panel that controls the operation of each device.

The apparatus body S is movable by the left and right movement apparatus 70 and the shank movement apparatus 90. The left and right movement apparatus 70 or the shank movement apparatus 90 is composed of, for example, a ball screw and a nut. Or, it may be composed of a slide member, a locking member and a slide groove, or may be configured by installing a hydraulic cylinder.

Hereinafter, the operation of the high speed processing apparatus of the present invention will be described.

Since the plastic resin 100 discharged onto the film from the extrusion die 10 ′ is semi-melt, it is stretched between the extrusion die 10 ′ and the cooling roll 30 to reduce the left and right widths thereof. (See FIG. 4). In the camera device 20 provided in front of the plastic resin 100 between the extrusion die 10 'and the cooling roll 30, the shape of the resin is photographed and the data is transmitted to the computer system 80. In the computer system 80, not only the difference between the maximum width and the minimum width of the resin 100 located between the extrusion die 10 'and the cooling roll 30 is determined as a neck-in value, but also the shape of the resin. Calculate quantitatively to drawability based on Therefore, according to the present invention, since the neck-in value for the molten resin 100 can be directly measured, rather than the plastic film 200, it is possible to more accurately grasp the processing characteristics of the film (Fig. 2 and FIG. 4).

In addition, since the molten resin 100 is severely shaken from side to side between the extrusion die 10 'and the cooling roll 30, when the change of the molten resin 100 is measured by the camera device 20, the final product is The shaking of the film 200 can be grasped. In particular, the camera device 20 is preferably a CCD camera provided with a so-called charge coupled device (CCD) which is a type of solid state imaging device. CCD cameras, unlike camera sensors, which are conventional sensing devices that take images one by one by converting the optical image of the subject that enters the camera into an electrical signal (image signal), detect a continuous change in the molten resin that is stretched. Can be observed. Therefore, it is suitable to photograph the shape of the molten resin 100 that is continuously stretched and changed between the extrusion die 10 'and the cooling roll 30.

Since the molten resin 100 is cooled on the cooling roll 30 to form the plastic film 200, the width change due to stretching is insignificant thereafter. The plastic film 200 is wound by a winding device 60 outside the device body S via guide rolls 40 and 50.

On the other hand, according to the present invention, if the extrusion amount of the extrusion die is changed in accordance with the processing conditions, the molten resin can be discharged, and in order to maintain an appropriate elongation according to the type of the plastic material, the stretching speed, etc. It can also move suitably up, down, left, and right.

 In addition, the drawability of the film increases as the molecular weight of the plastic is larger and the molecular weight distribution is wider, and in the case of neck-in, the opposite tends to decrease. Since these two factors have a mutual correlation, they can be stretched at high speed. At this time, it is necessary to optimize the temperature of the extrusion die, the amount of extrusion, the cooling temperature, and the winding speed.

As described above, the present invention by processing the plastic film at high speed, by quantitatively detecting the structural properties such as the drawability, neck-in, shaking, stretching resonance, breakage of the molten resin through processing, There is an advantage that can accurately evaluate the processability according to the structural properties.

In addition, the present invention is to store the continuous changes of the stretched molten resin as an image, and to save it as a file and automatically processed by a computer system, more accurate product properties information for determining the optimum processing conditions of plastic materials There is an effect that it can be obtained easily.

1 is a schematic configuration diagram of a conventional plastic film high speed processing apparatus,

FIG. 2 is a diagram showing the main components of the apparatus of FIG.

3 is a schematic configuration diagram of a plastic film high speed processing apparatus of the present invention,

4 is a view showing the main parts of the apparatus shown in FIG.

<Description of the symbols for the main parts of the drawings>

10 ... Extruder, 10 '... extrusion die,

20 camera unit, 21 camera unit,

30 cooling rolls, 40, 50 guide rolls,

M ... winding drive, 60 ... winding device,

70 ... device body, 80 ... computer system,

81 ... control panel, 90 ...

S ... device body, 100 ... plastic resin,

200 ... plastic film.

Claims (4)

An extruder 10 to which an extrusion die 10 'is connected; A cooling roll 30 for stretching the semi-molten plastic resin 100 discharged from the extrusion die 10 'and quenching the same to make the plastic film 200; A camera device 20 photographing the shape of the plastic resin 100 which is disposed between the extruder 10 and the cooling roll 30 and is stretched; A plurality of guide rolls 40 and 50 for guiding the film 200 transferred from the cooling roll 30; A winding device 60 for winding the film 200 passed through the cooling roll 30 and the guide rolls 40 and 50; A processing unit 80 processing data transmitted from the camera device 20 to calculate physical properties of the plastic film; Plastic film high speed processing apparatus, characterized in that configured to include. The method of claim 1, The camera device 20 is a plastic film high-speed processing apparatus, characterized in that the CCD camera device. The method of claim 1, The camera device 20, the plastic film high-speed processing apparatus, characterized in that the movable up, down, left and right. The method of claim 1, The cooling roll 30, the guide body (40, 50) is equipped with the device body (S) is a high-speed plastic film processing apparatus, characterized in that the movable up, down, left and right.