KR20200031794A - The device for manufacturing thin sheet/film and the methid of the same - Google Patents

Abstract

The present invention relates to a roll forming device forming a thin sheet/film of a wide predetermined thickness while passing through a pair of formed rolls and a plurality of cooling rolls disposed after forming, mulling, and rolling a bank from two or more rolling rolls by extruding a melted resin through a T-die in a film state, wherein the melted resin is melted and mulled in an extruder, and to a roll forming method. A wide and thin sheet/film with improved thickness precision and smoothness can be formed at high speed by overcoming problems in a metal roll forming method using an existing T-die and a calender forming method.

Description

Sheet / film roll forming apparatus and roll forming method {THE DEVICE FOR MANUFACTURING THIN SHEET / FILM AND THE METHID OF THE SAME}

The present invention relates to a roll forming apparatus and a roll forming method for a wide and thin sheet / film that is applied to applications such as furniture surface materials, interiors, and surface decoration by molding a thermoplastic resin.

More specifically, the melted and kneaded melted resin in an extruder is extruded in a membrane state through a T-die to form a bank in two or more rolling rolls, sequentially passing through the kneading and rolling forming process, and then a pair disposed thereafter. It relates to a roll forming apparatus and a roll forming method for forming a sheet / film having a wide width and a thin thickness while passing through a forming roll and a plurality of cooling rolls.

In general, the thermoplastic resin forming method includes a metal roll forming method and a calender forming method.

In the metal roll forming method, the melted and kneaded melted resin is extruded in a film state through a T-die in an extruder, supplied between a pair of forming rolls, and pressed to form a predetermined thickness while being wound on the forming roll surface of one side. . The forming roll is composed of a touch roll and a main roll. The touch roll and the main roll are made of a high rigidity metal, and the touch roll and the main roll are cooled by a fluid circulated therein. The touch roll and the main roll made of a high-rigidity metal have no surface deformation even at a high linear pressure, and a surplus of molten resin is collected to form a bank.

The above forming method is referred to as a metal roll forming method, and for forming a thin sheet / film, a metal elastic roll having an outer tube made of a metal thin film having flexibility and elasticity is applied to a touch roll made of a metal having high rigidity.

For example, as shown in FIG. 6, one of the two rolls is a roll that guides the molten resin as a metal roll 52, which is the main roll, and the other is a thin film-type molten resin having flexibility and elasticity in the roll outer cylinder. As a metal elastic roll 51 that is in close contact with the surface of the metal roll 52, the molten resin extruded in a thin film state through the T-die 10 is pressed to obtain a product having a surface having a predetermined thickness.

That is, the metal roll is composed of a high-rigidity metal, and the metal elastic roll must be able to adhere evenly by applying a uniform force to the surface of the metal roll with a thin film molten resin (L), and on the other hand, the wound on the roll surface In order to prevent it from appearing, a metal elastic roll made of a thin film outer cylinder made of metal is used so that the roll outer cylinder has elasticity, that is, flexibility.

In the metal roll forming method, the bank amount is adjusted according to the molding pressure applied to the molten resin and the interval between the rolls and the temperature and viscosity of the molten resin.

In the case of forming a thick sheet, there is no difficulty in molding due to cushioning properties even with a large amount of banks, but the thinner the sheet thickness, the faster the molten resin in the film state needs to be cooled and the banks need to be reduced. On the surface of the ground sheet, a transversely uneven shape called a bank mark occurs.

In addition, in the metal roll forming method, a manual or automatic die nip adjusting device is used to precisely control the entire thickness of the molten resin extruded in a thin film state, and the thinner the sheet, the more T-die. The nip spacing of the should be narrowed and adjusted precisely.

When extruding the molten resin into a thin film state by adjusting the nip spacing of the T-die narrow, die lines and the like occur on the surface of the thin film, and thus the surface condition of the formed sheet / film is poor, resulting in poor productability.

In addition, when forming a sheet / film having a wide width and a thin thickness, additives are added to improve physical properties or to obtain rigidity. This problem is remarkably caused by the amount of additives or additives added.

That is, the metal roll forming method using the T-die has the advantage of being capable of forming a sheet / film having good thickness precision and surface smoothness compared to other forming methods, but the above-mentioned problems are formed in the molding of a thin sheet / film. Is occurring.

Meanwhile, as illustrated in FIG. 5, the calendar forming method is to continuously produce sheets / films in four or more calender rolls 20 that rotate in opposite directions to each other, and the resin in a semi-melted state is heated to a melting temperature. It is possible to form a thin sheet / film by melting, kneading and rolling through a roll.

In addition, the calender forming method is capable of high-speed production, and when replacing raw materials, it can be replaced in a very short time compared to an extrusion molding machine, and thus has a cost-effective and economical advantage.

However, the sheet / film formed by the calender forming method does not have excellent thickness precision and surface smoothness compared to the sheet / film formed by the metal roll forming method.

The calender forming method is to melt, knead, and roll a molten resin in a semi-melted state between four or more calender rolls to form a sheet / film, and the molten resin supplied in a semi-melted state forms an uneven bank.

When forming by melting, kneading, and rolling in a calender roll as described above, the surface temperature of the calender roll is non-uniform due to an uneven bank, and the temperature of the molten resin is increased due to heat generation, making transition between rolls difficult, and thus sheet / film. It is difficult to form a high quality sheet / film due to poor surface smoothness due to the inconsistent thickness precision of.

Polypropylene resin, which is a crystalline resin, has a phenomenon in that it adheres to the surface of a calender roll due to its inherent adhesive properties. In particular, when a ductility such as a polyvinyl chloride molded body is imparted, the adhesion becomes more severe, the melt strength becomes weak, and the transition between calender rolls becomes difficult, resulting in poor thickness accuracy of the sheet / film and poor surface condition and appearance quality.

In addition, the calender forming machine has a problem that the cost of the equipment is excessive and the installation area is large compared to the extrusion molding machine.

Therefore, the roll forming method of the known sheet / film has limitations in forming a sheet / film having a wide width and a thin thickness.

KR 10-0860731 B KR 10-0585541 B

The present invention overcomes the problems in the metal roll forming method using the conventional T-die and the calender forming method, forming a wide and thin sheet / film, particularly a thermoplastic resin polypropylene resin into a thin sheet / film. It is an object of the present invention to provide a roll forming apparatus and a roll forming method capable of forming a sheet / film of a thin film having improved thickness precision and surface smoothness, and having excellent transparency and surface gloss.

Roll forming apparatus of the sheet / film according to the present invention for achieving the above object,

Comprising a T-die and two or more rolling rolls disposed after the T-die,

It is a technical feature of forming a bank in the rolling roll by kneading and rolling forming a molten resin extruded in a film state through a T-die.

In addition, a pair of forming rolls are disposed after the rolling roll, and the forming rolls are technically made of a metal elastic roll and a metal roll.

In addition, it is a technical feature that the metal elastic roll is additionally disposed after the forming roll.

In addition, a plurality of cooling rolls are disposed after the forming roll, and the sheet passing between the forming rolls alternately cools both sides of the sheet while passing through the cooling roll surface, and when the sheet passes between the cooling roll and the cooling roll, the cooling roll It is technically characterized in that cooling is performed while being tightly wound on the surface.

In addition, the surface temperature of the rolling roll is characterized in that the melting point + 10 degrees or more and melting point + 50 degrees or less.

In addition, the two or more rolling rolls are characterized in that the rotation speed is adjusted quickly as it is disposed in the rear.

In addition, it is a technical feature to form a transparent sheet / film by setting the surface temperature of the forming roll to 10 degrees or more and 30 degrees or less.

And the roll forming method of the sheet / film according to the present invention,

It is a technical feature of forming a bank from the rolled roll, kneading and rolling forming a sheet / film through a rolling roll in which two or more molten resins extruded in a film state through a T-die are arranged. .

In addition, it is characterized by being formed into a sheet having improved thickness precision and surface smoothness by subjecting it to a rolling roll after passing through the rolling roll.

In addition, it is a technical feature to determine the thickness of the sheet by sequentially adjusting the spacing between the rolling rolls and the rotational speed of the rolling rolls sequentially.

According to the present invention, a molten resin sheet melted and kneaded in an extruder is extruded through a T-die into a film having a predetermined thickness to form a bank between two or more rolling rolls, and then kneaded and rolled sequentially to form a thin sheet of molten resin. Through the process of forming with a releasing roll and the process of cooling the entire width of the molten resin sheet formed in a thin thickness at the same time with uniform pressure in the forming roll, the width and thickness of the sheet / film are improved and the thickness accuracy and surface smoothness are improved. Sheets / films can be molded at high speed.

1 is a schematic diagram for schematically explaining a roll forming apparatus and a roll forming method according to the present invention.
Figure 2 is a simplified diagram showing another embodiment of the present invention.
3 is a simplified diagram showing another embodiment of the present invention.
4 is an enlarged view of a portion of the forming roll shown in FIG. 2.
5 is a view for explaining a conventional calender forming method.
6 is a view for explaining a conventional metal roll forming method.

Hereinafter, a roll forming apparatus and a roll forming method of the sheet / film of the present invention will be described in more detail with reference to the drawings.

The present invention is for forming a sheet / film having a wide width and a thin thickness, and is referred to as a thin film sheet (for example, a sheet having a thickness of 0.06 or more and 0.6 mm or less). In addition, a film has a thickness thinner than a sheet, and hereinafter, all of them are collectively described as a thin film sheet.

As shown in Figure 1, the roll forming apparatus of the thin film sheet of the present invention is a T-die 10 and two or more rolling rolls for extruding molten resin kneaded in a film state in an extruder (not shown) Including (20),

After the rolling roll 20, a release roll 30, a forming roll 50, and a plurality of cooling rolls 60 are disposed.

The extruder melts and kneads the composition in which the thermoplastic resin and additives are mixed at 200 to 280 degrees, extrudes them into a membrane state through the T-die 10 and supplies them to the rolling roll 20.

Two or more rolling rolls 20 are disposed, and FIG. 1 includes three rolling rolls 21, 22, and 23, and the molten resin extruded in a membrane state through a T-die includes three rolling rolls ( 21, 22, 23), two banks B are formed.

And the rolling roll can be arranged in a horizontal type, vertical type, inclined type, etc., and the rolling roll can be temperature controlled and speed controlled (not shown). It is preferable that the spacing and speed between the rolling rolls can be precisely controlled by applying a servo motor and a precision gearbox.

The surface of the rolling roll 20 is preferably applied to a roll surface-treated with chilled steel, and the temperature can be controlled by circulating the fluid inside the rolling roll 20. And the rolling roll 20 may be a conventional roll.

That is, the outer cylinder of the rolling roll 20 is made of a high-rigidity metal and does not deform even at a high linear pressure. A fluid circulation furnace is formed between the high rigid metal outer cylinder and the inner cylinder to control the surface temperature of the rolling roll 20 by circulating fluid.

For reference, when forming a thin film sheet using a rolling roll of a thermoplastic resin, as a means of preventing the resin from adhering to the rolling roll surface, in particular, an anti-sticking agent is used to prevent adhesion to the polypropylene resin or to increase the thermal stability effect. A method of addition has been proposed.

The anti-sticking agent may be applied with stearic acid, stearyl alcohol, butyl stearate, wax, low molecular weight polyethylene, liquid paraffin, etc. If excessively added, kneading becomes difficult, or the transparency of the product is impaired. It is preferable to add in an appropriate amount because there is a problem that the original performance of the thermoplastic resin sheet is impaired.

Hereinafter, the present invention will be described with reference to FIG. 1.

The molten resin that is melted and kneaded in an extruder and extruded in a film state through a T-die is formed with a bank B between the first rolling roll 21 and the second rolling roll 22 of the rolling roll 20. It is kneaded and rolled to form a thickness primarily while passing through the nip of the rolling rolls 21 and 22, and is wound on the surface of the second rolling roll 22 to between the second rolling roll 22 and the third rolling 23 roll. The bank is formed by transferring, kneading, and rolling to form a molten resin sheet having a predetermined thickness while passing through the nips of the rolling rolls 22 and 23.

In addition, the molten resin sheet that has passed through the last third rolling roll 23 is cooled and solidified simultaneously with the pressure of the pair of forming rolls 50 through the release roll 30 to be formed into a thin film sheet having improved thickness precision and surface smoothness.

The release roll 30 allows the molten resin sheet wound in contact with the last third rolling roll 23 to be smoothly peeled off.

As described above, in the conventional metal roll forming method, the nip of the T-die must be precisely adjusted to control the overall thickness of the molten resin extruded through the T-die in a thin film state. As the thickness becomes thinner, the nip spacing of the T-die needs to be narrower and more precisely controlled. As a result, a die line is generated on the sheet surface of the molten resin extruded through the T-die in a thin film state, and the generated die line is formed into a roll. There was a problem that appears as it is on the surface of the molded sheet. In addition, there was a difficulty in that the nip spacing of the T-die must be uniformly and precisely controlled for forming a thin sheet.

Thus, in the present invention, even if the molten resin is extruded through the T-die 10 into a film having a predetermined thickness to form a thin sheet, the rolling roll 20 after the T-die is disposed to melt extruded into the film. As the resin passes through the rolling roll 20, two banks are formed, kneading is performed and rolling to pass through the release roll 30 and through the forming roll 50, the thickness is determined, compared to the conventional T-die. It does not require a narrow nip spacing, and a high precision T-die is not required.

That is, in the case of forming a thin sheet, by extruding a thin film of molten resin through a nip of a T-die, which requires precise control, it is cooled simultaneously with narrow pressure in a forming roll (see 51, 52 / FIG. 6). Compared to molding,

In the present invention, the process of forming the thickness while passing the nip between the rolling rolls 20 is made twice by supplying molten resin formed of a film of a predetermined thickness by increasing the nip spacing of the T-die between the rolling rolls 20. It has the advantage that it can be molded to a precise thickness and can be molded without the occurrence of a die line, thereby improving productivity by not requiring a T-die that requires conventional precise control. Consequently, in the present invention, one nip in the T-die and two nips in the rolling roll 20 pass through the three nips. And the entire width of the rolling roll 20 to uniformly supply the molten resin to a predetermined width so that the molten resin in the film state extruded from the T-die 10 is uniformly banked in the rolling roll 20. The banks formed over are uniform.

The surface temperature of the rolling roll 20 is set to a temperature of melting point +10 degrees or more and melting point +50 degrees or less. In the conventional calender forming method, the surface temperature of the calender roll is set to a high melting temperature of the resin, which is different from forming. There is. That is, in the calender forming method, the surface temperature of the calender roll is set to a high melting temperature of the resin, whereas in the present invention, the surface temperature of the rolling roll is set to a low melting temperature of +10 degrees or more and a melting point of +50 degrees or less. Since it can be molded, it is possible to improve productivity even in molding of a resin having a low melt strength.

When the surface temperature of the rolling roll 20 is lower than the melting point, the surface of the sheet tends to be rough or the residual strain in the sheet becomes large, so that the shrinkage is high or the sheet itself cannot be obtained in severe cases.

Conversely, when the surface temperature of the rolling roll 20 becomes too high than the melting point, the molten resin sheet sags or adheres to the roll surface, making it difficult to form.

In the present invention, the surface temperature of the rolling roll 20 is lower than the melting point of the resin +10 degrees or higher than the melting point +50 degrees or less because the molten resin, which has been previously melted and kneaded in an extruder, is supplied to the rolling roll 20 through a T-die. It is desirable to set the temperature low. At a temperature in this range, even if the melt tension is insufficient, since it can be molded at a low temperature, the sagging of the molten resin sheet can be minimized, and adhesion to the roll surface can be prevented, thereby reducing shrinkage.

The thickness control of the thin film sheet formed by the present invention is the spacing between the first rolling roll 21 and the second rolling roll 22 of the rolling roll 20, the second rolling roll 22 and the third rolling roll ( 23) by adjusting the nip spacing between, and rapidly adjusting the rotational speed of the rolling roll 20 sequentially, and finally controlling the rotational speed of the release roll 30 and the rotational speed of the forming roll 50. The thickness of the sheet can be determined.

Next, the molten resin sheet that has passed through the rolling roll 20 and the peeling roll 30 is cooled simultaneously with a narrow pressure between a pair of forming rolls 40 and passes through a plurality of cooling rolls 60, thereby providing thickness precision and It is molded into a thin film sheet with improved surface smoothness.

The forming roll 50 according to the present invention comprises a metal elastic roll 51 and a high rigidity metal roll 52.

Kneading and rolling while passing between the first rolling roll, the second rolling roll, and the third rolling rolls 21, 22, and 23, the hot rolled molten resin sheet is transferred to the metal elastic roll 51 and the metal. While passing between the rolls 52,

When the molten resin sheet is pressed between the metallic elastic roll 51 and the metallic roll 52, the metallic elastic roll 51 is in a concave shape while contacting along the outer circumferential surface of the metallic roll 52 via the molten resin sheet. It is elastically deformed.

Thus, the molten resin sheet pressed between the metal elastic roll 51 and the metal roll 52 is formed by surface contact, so that the molten molten resin sheet pressed between the metallic elastic roll 51 and the metal roll 52 is uniform. It can be compressed to form a sheet having a constant thickness and improved surface smoothness.

The surface contact distance (L1) of the sheet in the metallic elastic roll 51 is preferably 2 to 10 mm (see FIG. 4), and the linear pressure for pressing the sheet between the metallic elastic roll 51 and the metallic roll 52 is 10 kgf. It can be appropriately adjusted within the range of / cm to 50kgf / cm.

Line pressure refers to the force acting by engaging a pair of rolls in a lengthwise direction of 1 cm when they are pressed against each other. As a method of controlling the line pressure when the sheet is pressed, a coater is installed between the parts pressing the metal elastic roll 51 to the metal roll 52, and the roll spacing is adjusted by adjusting the coater to adjust the line pressure. You can. As a method of pressing the metal elastic roll 51 against the metal roll 52, a general method of pressing the metal roll 52 until it contacts the coater using hydraulic pressure, air, or the like can be applied.

The metal elastic roll 51 is preferably a metal elastic roll 51 having a metal thin film outer cylinder 51a, and the metal elastic roll disclosed in Korean Patent Registration No. 10-1604402 (Registration on March 11, 2016) can be applied. .

In the conventional extrusion molding method, the edge of both ends by neck-in (reducing the width of the molten resin sheet) at a distance from the molten resin extruded through the T-die in a thin film state to contact the forming roll. Thickens, and in the conventional high-rigidity metal roll, only the thick portion of both ends of the sheet is compressed, so that the central portion of the sheet cannot be pressed.

However, in the present invention, the resin melted and kneaded in an extruder and melted resin extruded in a membrane state through a T-die is kneaded and rolled in a rolling roll 20 set at a temperature of melting point +10 degrees or higher and melting point +50 degrees or lower. Cooling is performed through two passes, and it is possible to reduce the width shrinkage of the sheet under the influence of neck-in because the sheet is formed at a low temperature.

The metal elastic roll 51 of the present invention is provided with a metal thin film outer cylinder 51a to uniformly narrow the entire width of the sheet by the elastic action of the metal thin film outer cylinder, so that the thickness is constant and the surface can be smoothly formed. .

Particularly, when forming a sheet having a wide width and a thin thickness, adhesion between the molten resin sheet and the forming roll may be inhibited, resulting in uneven adhesion in the width direction of the molten resin sheet, thereby forming a thin sheet. A flexible metal elastic roll is useful and effective.

The metal thin film outer cylinder 51a of the metal elastic roll 51 is made of carbon steel or stainless steel, and the thickness is preferably about 0.6-3 mm. Also, a seamless structure having flexibility and having no welding seam is preferable.

The surface of the metal thin film outer cylinder 51a is treated with a mirror surface to obtain a sheet having surface gloss. And if the surface is uneven or patterned, its shape can be transferred to the sheet surface. The surface roughness of the metal thin film outer cylinder 51a is preferably 0.2S or less.

The surface of the metal roll 52 may be formed of irregularities or patterns to obtain a sheet on which irregularities or patterns are formed, and the surface of the metal roll 52 may be mirrored and transferred to a mirror surface to obtain a sheet having surface gloss. . The surface roughness of the metal roll 52 is preferably 0.2S or less.

The fluid pressure is filled in the pressure chamber inside the metal elastic roll 51. The fluid filled in the pressure chamber is cooled by the fluid circulating inside the roll. And the metal roll 52 is cooled by the fluid circulated between the outer and inner cylinders. The surface temperature of the metal elastic roll 51 and the metal roll 52 can be controlled by a temperature control device and a fluid circulation device (not shown).

Since the thin film sheet having a thickness of 0.6 mm or less is cooled quickly, it is necessary to cool by contacting both surfaces of the sheet at the same time by narrowing the metal elastic roll 51 and the metal roll 52.

Further, the metal elastic roll 51 and the metal roll 52 are connected to a servo motor, and are configured to adjust the rotation speed of each roll by a rotation speed adjusting device (not shown).

Meanwhile, the roll forming apparatus and the roll forming method according to the present invention may further arrange the second metal elastic roll 53 after a pair of forming rolls, as shown in FIG. 2.

As shown in FIG. 2, in the case of the forming roll 50, the second metal elastic roll 53 is additionally disposed after the metal roll 52, so that the sheet rolled on the surface of the metal roll 52 is transferred to the metal roll Cooling is achieved by contacting the surfaces of the metal 52 and the second metal elastic roll 53 to be placed thereafter by narrow pressure.

The sheet that has passed through the pair of forming rolls 51 and 52 is pressed once again between the second metal elastic roll 53 and the metal roll 52, which are additionally disposed after the metal roll 52, to make uniform surface contact. Since the cooling is performed, the thickness precision and surface smoothness of the sheet can be further improved.

In FIG. 1, three rolling rolls are disposed after the T-die, but in FIG. 3, two rolling rolls are disposed after the T-die, and in the present invention, melt is extruded into a film state through the T-die. The resin is characterized by molding in two or more rolling rolls.

Next, the present invention can obtain a transparent sheet or an opaque sheet according to the surface temperature of the forming roll 50.

Specifically, the temperature of the molten resin sheet that has passed through the release roll 30 is transferred to a temperature of 80 degrees or more and below the melting point, and cooling is performed simultaneously with narrow pressure in the forming roll 50. It is possible to obtain a sheet which is transparent by quenching on a forming roll 50 having a surface temperature of 10 degrees or more and 30 degrees or less, an improved surface smoothness, and an excellent surface gloss.

In addition, the sheet on which the cooling is performed on the forming roll 50 in which the surface temperature of the forming roll 50 is set to 80 degrees or more and below the crystallization temperature, surface smoothness is improved, and a rigid sheet can be obtained.

Next, as shown in FIGS. 1 to 3, the sheet formed by cooling through the forming roll 50 is alternately cooled on both sides of the sheet while passing through a plurality of cooling rolls 60 arranged thereafter.

In the present invention, a plurality of cooling rolls 60 are disposed after the forming roll 50, so that the sheet alternately cools both sides of the sheet while passing through the surface of the cooling roll 60, thereby minimizing temperature variations on both sides of the sheet, thereby smoothing the sheet. Can be produced at high speed.

The cooling roll 60 is a rigid metal roll, which is a roll that finally cools a sheet that has passed through the forming roll 50, and can control the surface temperature of the cooling roll 60 by a fluid circulating inside the roll.

As the cooling roll 50, a commonly used roll having a double pipe structure can be used, and it is also disclosed in Patent No. 10-1781434 (registered on September 19, 2017).

The cooling roll 50 has a surface temperature controlled by a fluid temperature control device and a circulation device (not shown), and each cooling roll 60 is connected to a motor to control speed by a rotating device (not shown). You can.

The cooling roll 60 cools both sides of the sheet when passing between the cooling roll 60 and the cooling roll 60, which are disposed after the forming roll 50 and the sheet that is cooled simultaneously with the narrow pressure in the forming roll 50. It can be cooled by being in close contact with the roll 60 surface.

Both sides of the sheet are in close contact with the surface of the cooling roll 60 so that air is not sucked in between, so that the sheet can be cooled without interposing an air layer. It is possible to improve the cooling efficiency.

And when the sheet is in close contact with the surface of the cooling roll 60, the gap between the cooling roll and the cooling roll can be adjusted by adjusting the coater to the portion pressing the cooling roll 60 to adjust the roll spacing. The adjustment of the interval between the cooling rolls 60 and the cooling rolls 60 may be applied by using a hydraulic pressure, air, or the like, until a contact with the coater is performed at a predetermined pressure.

It is preferable that the surface temperature of the cooling roll 60 is 20 degrees or more and 50 degrees or less.

In describing the present invention in the above, the present invention has been described with reference to the accompanying drawings, but the present invention is capable of various modifications, alterations and substitutions by those skilled in the art, and such modifications, alterations and substitutions belong to the protection scope of the present invention. Should be interpreted.

* Explanation of reference numerals for main parts of drawings *
10: T-die B: bank
20: rolling roll, calender roll
21: 1st rolling roll 22: 2nd rolling roll
23: third roll
30: release roll
50: forming roll
51: metal elastic roll 51a: elastic outer cylinder
52: metal roll 53: second metal elastic roll
60: cooling roll

Claims (10)

T-die; And
Including two or more rolling rolls disposed after the T-die,
Roll forming apparatus of a sheet / film, characterized in that the molten resin extruded in the form of a film through a T-die is kneaded and rolled by forming a bank in the rolling roll. According to claim 1,
A pair of forming rolls are disposed after the rolling roll,
The forming roll is a roll forming apparatus for a sheet / film, characterized in that it comprises a metal elastic roll and a metal roll. According to claim 2,
Roll forming apparatus of a sheet / film, characterized in that the metal elastic roll is further disposed after the forming roll. According to claim 2,
After the forming roll, a plurality of cooling rolls are disposed, and the sheet passing between the forming rolls alternately cools both sides of the sheet while passing through the cooling roll surface,
When the sheet passes between the cooling roll and the cooling roll, the roll forming apparatus of the sheet / film, characterized in that cooling is performed while being tightly wound on the surface of the cooling roll. According to claim 1,
The roll forming apparatus of a sheet / film, characterized in that the surface temperature of the rolling roll is at least +10 degrees and at least +50 degrees. According to claim 1,
The roll forming apparatus of a sheet / film, characterized in that, as the two or more rolling rolls are disposed at the rear, the rotational speed is rapidly adjusted. According to claim 2,
A sheet / film roll forming apparatus characterized by forming a transparent sheet / film by setting the surface temperature of the forming roll to 10 degrees or more and 30 degrees or less. A roll of sheet / film formed into a sheet / film through a kneading and rolling forming process by forming a bank in the rolling roll while passing through a rolling roll in which two or more molten resins extruded in a film state through a T-die are arranged. Forming method. The method of claim 8,
After the rolling roll, the sheet / film roll forming method is characterized in that it is formed into a sheet having improved thickness precision and surface smoothness by being compressed by a forming roll. The method of claim 8,
A method of forming a sheet / film roll, characterized in that the thickness of the sheet is determined by sequentially and rapidly adjusting the spacing between the rolling rolls and the rotational speed of the rolling rolls.

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