KR20100013906A - Manufacturing apparatus of linear low polyethylene - Google Patents

Abstract

PURPOSE: A linear low density polyethylene film apparatus is provided to improve the flatness and the distortion of a film by rotating a film which passes through a first and a second oblique guide roll. CONSTITUTION: A linear low density polyethylene film apparatus comprises hotwires(40), an air circulation bar, and a rotating and winding unit(60). The hotwire surrounds the outer circumference of bubbles(32) of a constant section. The hotwire heats up the bubble to maintain the constant temperature of the bubble. The air circulation bar is fixed on the center of an annular die. The air circulation bar purifies the air of the bubble through a transfer pipe(51) connected to a motor(52).

Description

Linear low density polyethylene film manufacturing unit

The present invention is to rotate the bubble produced in the annular die in a nip roll (Niproll) and to arrange the first and second diagonal guide roll between the horizontal guide roll and the vertical guide roll during the transfer to the take-up roll in a naturally cooled state The present invention relates to a linear low density polyethylene film production apparatus which improves the smoothness of the film produced by rotating the film by 720 ° and reduces the warping phenomenon.

In general, polyethylene is used in a wide range of fields because of its excellent electrical / mechanical properties, processability, and low cost, and is used as a low density / high density polyethylene film according to the field of use. Mixing the advantages of such a low density / high density polyethylene film is a linear low density polyethylene as a method for producing it is largely a bottom-up / down film manufacturing method.

1 relates to a "down-air cooling type low-density polyethylene and low-density polyethylene film production apparatus and its manufacturing method" published in the Republic of Korea Patent Publication No. 10-2006-0095532, the raw material of low density polyethylene and low-liner polyethylene Injecting air into the injection film 300 sprayed from the absorber 100 and the vinyl chip supply device 160 and the heating spraying device 200 on the upper portion of the pipe wiring column 180 and the elevated workshop 400 while using the It is characterized in that the air injection device 500 is manufactured by the lowering while spraying down while adjusting the size and thickness.

The prior art as described above has a problem in that the film is deteriorated by spraying a film of a bubble shape downward and is not sprayed at a uniform speed. In addition, there is a problem that the smoothness and distortion of the film is generated by winding the film by arranging the horizontal motor shaft.

In order to solve the problems of the prior art as described above, the present invention transfers the molten bubble-shaped film to a vertical portion by a blower at a uniform speed, and maintains the temperature of the bubble due to a hot wire fixed to a certain section of the bubble. Its purpose is to allow it to cool after maintaining a certain period.

In addition, it is an object to provide a linear low-density polyethylene manufacturing apparatus is wound around the winding roll by passing the first and second diagonal guide roll fixed between the horizontal / vertical guide roll and 360 ° rotated through the nip roll.

The linear low density polyethylene film manufacturing apparatus of the present invention is fixed to the ground and divided into a lower structure, a middle portion, and a tower-shaped fixed structure, a die head in which pellet resin is introduced after melting in an extruder, and an upper portion of the die head. In the linear low-density polyethylene manufacturing apparatus is combined and formed with an annular die for vertically conveying the molten resin by the blower in a bubble state, a plurality of fixed is fixed to the lower portion of the fixed structure to surround the outer periphery of the bubble section A heating wire for applying heat so that the temperature of the bubble is kept constant and conveyed; An air circulation bar which is fixed at the center of the annular die and protrudes at a predetermined height to purify the air inside the bubble through a transfer pipe connected to the motor; The bubble passes through the nip roll and simultaneously cools down while being press-fitted, and has a structure in which a winding winding rotates 360 °.

In addition, the hot wire is fixed to a vertical bar, the horizontal bar of a curved shape wrapped around the bubble, inserted into the horizontal bar is formed in the circular roller to rotate in the bubble transfer direction to apply heat.

In addition, the rotary winding unit is fixed to the upper nip roll protruding in the center and rotated by a rail fixed to the bottom, a horizontal guide roll fixed to the upper nip roll, and fixed to the nip roll outer surface and one side of the rotating plate diagonally First and second diagonal guide rolls, a vertical guide roll fixed perpendicularly to the rotating plate, and a winding roll on which a film is wound are formed.

In addition, the blower is formed in the center of the wing in the direction of the outer circumference spiraling outwards to emit a blow.

In addition, the bubble is rotated 360 ° by the rotating plate while passing through the nip roll, and after passing through the nip roll is rotated 360 ° further through the horizontal guide roll, the first and second diagonal guide roll, the vertical guide roll.

The linear low density polyethylene film production apparatus according to the present invention having the configuration as described above allows the bubble-shaped film to be dried and transported to the upper portion by a blower that blows air from the wings formed in a streamline shape, and the annular die is The bubble is enclosed by the escape, but the temperature of the bubble can be maintained by using a fixed hot wire close to a certain section.

In addition, the film is rotated 360 ° while passing through the nip roll, and the fully cooled film is passed through the first and second diagonal guide rolls fixed between the horizontal guide roll and the vertical guide roll, and further rotated 720 ° to smooth and warp the film. The phenomenon is improved.

Hereinafter, a preferred embodiment according to the configuration and operation of the linear low density polyethylene film production apparatus according to the present invention will be described in detail with the accompanying drawings.

2 is a perspective view of a linear low density polyethylene film production apparatus according to the present invention, Figure 3 is a cross-sectional view of the annular die of the linear low density polyethylene film production apparatus according to the present invention, Figure 4 is a blower of the linear low density polyethylene film production apparatus according to the present invention Device perspective view, Figure 5 is a hot wire perspective view of a linear low density polyethylene film production apparatus according to the present invention, Figure 6 is an enlarged view of the rotary winding of the linear low density polyethylene film production apparatus according to the present invention.

The linear low density polyethylene film manufacturing apparatus of the present invention is fixed to the ground is divided into a fixed structure 10 divided into a lower portion 11, an intermediate portion 12, the upper portion 13, and the lower portion 11 of the fixed structure 10 The extruder 20 is fixed to the bottom surface of the pellet (Pellet) resin is melted and extruded, and the annular die is coupled to the extruder 20 and the molten resin is sprayed in the form of a bubble (32) (bubble) 30 and a heating wire 40 fixed to the middle portion 12 of the fixed structure 10 to surround the bubble 32 for a predetermined period and applying heat to the bubble 32, and the annular die 50. Bubbles processed in the form of film (A) by a nip roll 61 fixed to the inner center of the tube-shaped air circulation bar 50 protruding a certain height and fixed to the upper portion 13 of the fixed structure ( 32 is made of a structure in which the rotary winding unit 60 is conveyed to the take-up roll 68 is formed.

As shown in FIG. 2, the fixed structure 10 is a metal structure in the form of a tower, and a lower portion 11 to which the annular die 30 and the heating wire 40 are fixed for convenience of description, and the heating wire 40. The bubble 32 that passed through is divided into an intermediate part 12 which is naturally dried, and an upper part 13 to which the rotary winding part 60 is fixed, and the intermediate part 12 and the upper part 13 are film manufacturing apparatuses 1 Footrest (B) and the stairs (not shown) are formed so that the personnel controlling the).

The extruder 10 is fixed to the bottom bottom 11 of the fixed structure 10 and melts the resin in a pellet state, but supplies the resin in the molten state to the die head 31 described below through a supply pipe 34 coupled to one side. It is.

The die head 31 is intended to form a bubble 32 by extruding the molten resin transferred through the supply pipe 34 in a circular shape to the annular die 10 fixed at the top as shown in FIG. In addition, the annular die 10 has a blower 33 formed therein to supply air blown by a motor (not shown) formed outside so that the bubble 32 is dried and is vertically conveyed.

In particular, as shown in FIG. 4, the blower 33 has a plurality of spiral wings 331 curved outwardly from the center to cool the bubble 32, but maintains the temperature of the bubble 32. The blown air is prevented from continuously rising upward as the wind is scattered out of the bubble 32.

The hot wire 40 is a vertical bar 41 is fixed to the lower portion 11 as shown in Figure 5 protrudes vertically downward, a horizontal bar 42 fixed to a plurality of horizontal bars on the vertical bar 41 and the A plurality of horizontal rollers 42 are inserted to form a circular roller 43 which rotates in the bubble 32 conveying direction.

In particular, the hot wire 40 is fixed to the lower portion 11 so that the bubble 32 cooled by the blower 33 is prevented from rapidly falling due to the external environment is wrapped around the bubble 32 for a certain period to maintain the temperature To make it possible.

On the other hand, the center of the annular die 30 is projected to a certain height and the air circulation bar 50 of the tubular shape to allow fresh air to flow into the bubble 32 is fixed. The air circulation bar 50 enters and exits air through a transport pipe 51 fixed to the bottom surface of the annular die 30 by driving the motor 52, and the transport pipe 51 is connected to the air circulation bar 50. Connected to allow the temperature and the air inside the bubble 32 to be purified so that the bubble 32 is in close contact with the rotary winding (60) more effectively.

As shown in FIG. 6, the rotary winding unit 60 includes a nip roll 61 for injecting the bubbles 32 transferred to the upper portion 13 and a portion of the upper portion of the nip roll 61 penetrating the center thereof. The rotating plate 62 is fixed, the rail 63 is fixed to the lower surface of the rotating plate 62 to rotate the rotating plate 62 in the upper portion of the foot plate (B), and the film (A) form exiting the nip roll 61 First and second diagonal guide rolls fixed between the plurality of horizontal / vertical guide rolls 64 and 67 and the horizontal / vertical guide rolls 64 and 67 formed so as to transfer the resin. 65 and 66, and the winding roll 68 by which the film A of product form is wound is formed.

In addition, the rotation winding unit 60 is rotated 360 ° by the rotation of the rotating plate 62 while the bubble 32 passes through the nip roll 61, the horizontal guide roll 64, the first after the nip roll 61 passes By rotating 360 ° through the diagonal guide roll 65 and the vertical guide roll 67, the film A in the fully cooled state is rotated to improve the smoothness and distortion of the film A.

Hereinafter, the operation of the linear low density polyethylene film production apparatus according to the present invention will be described in detail.

According to the present invention, when the resin in a pellet state is put into the extruder 20 and power is applied, the extruder 20 operates while the melted resin is bubbled through the supply pipe 34, the die head 31, and the annular die 30. 32) It comes out in the form. The initial bubble 32 is tied to a string ring (not shown) and slowly pulled toward the nip roll 61 at the speed of operation of the extruder 20.

In general, the speed of the resin extruded from the extruder 20 is determined according to the rotational speed of the screw (not shown) of the extruder 20. The rotational speed of the screw is adjusted to 5 to 6 RPM before the bubble 32 is generated. When the bubble 32 is generated in the annular die 30, it is adjusted to 10 to 12 RPM, and when the bubble 32 passes through the nip roll 61, the rotation speed of the screw is increased until it becomes 50 RPM.

When the bubble 32 passes through the nip roll 61 to form the film B, the bubble 32 passes through the horizontal / vertical guide rolls 64 and 67 and the first and second diagonal guide rolls 65 and 66. To be wound on.

As described above, the present invention uses a blower inside the annular die to gradually cool the bubble transported to the vertical upper portion, and the air from the blower is formed in a streamline shape from the center to the outside to deprive the temperature of the bubble. The air is prevented from rising to the upper part, and is fixed to the middle part of the fixed structure to apply heat using a heating wire in a certain section of the bubble, thereby preventing the contraction and deformation due to rapid cooling.

In addition, the film rotated 360 ° by the rotating plate is passed through the horizontal guide roll, the first diagonal guide roll, the vertical guide roll, and the second diagonal guide roll after passing through the nip roll, and then rotated 360 ° further to improve the smoothness of the film. The warping effect is reduced.

The present invention is not limited to the preferred embodiments of the above features, and those skilled in the art to which the present invention pertains various modifications without departing from the gist of the present invention as claimed in the claims. Of course, such changes will fall within the scope of the claims.

1 is a perspective view of a downward air-cooled injector according to the prior art

2 is a perspective view of a linear low density polyethylene film production apparatus according to the present invention

Figure 3 is a cross-sectional view of the annular die of the linear low density polyethylene film production apparatus according to the present invention

Figure 4 is a perspective view of the blower of the linear low density polyethylene film production apparatus according to the present invention

5 is a perspective view of a hot wire of a linear low density polyethylene film production apparatus according to the present invention

Figure 6 is an enlarged view of the rotary winding of the linear low density polyethylene film production apparatus according to the present invention

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

10: fixed structure 11: bottom

12: middle portion 13: upper portion

20 extruder 30 annular die

31: diehead 32: bubble

33: blower 331: wing

34: supply pipe 40: heating wire

41: vertical bar 42: horizontal bar

43: circular roller 50: air circulation bar

51: transfer pipe 52: motor

60: rotation winding 61: nip roll

62: rotating plate 63: rail

64: horizontal guide roll 65,66: first and second diagonal guide roll

67: vertical guide roll 68: winding roll

Claims (5)

A fixed structure 10 in the form of a tower, which is fixed to the ground and divided into a lower portion 11, an intermediate portion 12, and an upper portion 13, and a die head 31 in which pellet resin is introduced after melting in the extruder 20. In the linear low-density polyethylene manufacturing apparatus is coupled to the top of the die head 31, the annular die 30 is formed so that the melted resin by the blower 33 is vertically transferred to the bubble 32 state, A plurality of heat wires 40 fixed to the lower part 11 of the fixed structure 10 so as to surround the outer circumference of the bubble 32 for a certain period of time, and thus applying heat so that the temperature of the bubble 32 is kept constant and transferred; ; An air circulation bar (50) fixed to the center of the annular die (30) to project a certain height and to purify the air in the bubble (32) through a transfer pipe (51) connected to the motor (52); The bubble 32 is a linear low-density polyethylene manufacturing apparatus, characterized in that the rotary winding through the nip roll (61) and at the same time as the indentation to be cooled and rotated 360 ° rotation was formed. The method of claim 1, The hot wire 40 is fixed to the vertical bar 41, the horizontal bar 42 of the curved shape wrapped around the bubble 32, and inserted into the horizontal bar 42 to rotate in the bubble 32 transfer direction Linear low density polyethylene manufacturing apparatus, characterized in that the circular roller 43 is applied to the formed. The method of claim 1, The rotary winding unit 60 is a rotating plate 62 which is rotated by a rail 63 fixed to the bottom of the nip roll 61 is protruded and fixed to the center, and the horizontal guide roll fixed to the nip roll 61 (64), the first and second diagonal guide rolls 65 and 66 fixed diagonally to one side of the nip roll 61 and the outer side of the rotating plate 63, and the vertical guide roll fixed perpendicularly to the rotating plate 63. A linear low density polyethylene production apparatus, characterized in that 67 and a winding roll 68 on which a film is wound. The method of claim 1, The blower 33 is a linear low-density polyethylene manufacturing apparatus, characterized in that the wing (331) for releasing the air blowing around the spiral circumferential direction in the center is formed. The method of claim 1, The bubble 32 passes through the nip roll 61 and is rotated 360 ° by the rotating plate 63, and after passing through the nip roll 61, the horizontal guide roll 64 and the first and second diagonal guide rolls 65 and 66. , Linear low density polyethylene manufacturing apparatus, characterized in that rotated 360 ° further through the guide roll (67).

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