JPH0924536A - Manufacture of sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet manufacturing apparatus capable of performing space conservation with small installing floor surface, having a simple structure and excellent operability and realizing high thermal efficiency. SOLUTION: A die 6 for melting resin to mold it to a sheet 10 is mounted at the end of an extruder 4 having a cylinder 2 placed on a base 1, a heater 3 surrounding the outer periphery of the cylinder 2, a screw 16 rotatably inserted into the cylinder 2, and a raw material supply port 5 for supplying thermoplastic resin raw material into the cylinder 2. A sheet cooling and taking-out unit 7, an annealing unit 15 and a winder 11 are so mounted at the base 1 continued to the die 6 as to be rotated Or, the annealing unit 15 is disposed at the position corresponding to the cylinder 2 of the extruder 4, and guide means 23a to 26c, 24a to 24c for guiding the heat of the heater 3 for heating the cylinder 2 to the unit 15 are provided.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a sheet manufacturing apparatus capable of manufacturing a thermoplastic resin sheet in a space-saving and energy-saving manner.

[0002]

2. Description of the Related Art A film manufacturing apparatus conventionally used for manufacturing a thermoplastic synthetic resin sheet or film is shown in FIG. That is, an extruder 4 is used in which a cylinder 2 is placed on a base 1, an outer peripheral surface of the cylinder 2 is surrounded by a heater 3, and a screw is rotatably inserted into the cylinder 2.

Further, while supplying the thermoplastic raw material resin into the inside of the extruder from the funnel-shaped raw material supply port 5 provided on the rear end (starting end) side of the cylinder 2, the molten resin is transferred to the cylinder 2 as the screw rotates. Transfer to the tip (end) of the. However, since the molten resin in the cylinder 2 becomes higher in temperature as it goes to the tip of the extruder 4 due to the heat generated by shearing, the cylinder 2 is cooled by an appropriate cooling means to control the temperature of the resin to a desired temperature. .

Further, a T die 6 is provided at the tip of the extruder 4, and the uniformly plasticized molten resin is extruded into a sheet form from the slit 6a of the T die 6. At that time, the resin sheet 10 melted at that time is provided with the slit 6a of the T die 6.
And sends it to the sheet cooling take-up machine 7 located in the vicinity of. This sheet cooling and take-up machine 7 has a plurality of polishing rolls 8a.
And 8b and 8c, the molten sheet 10 is cooled and solidified by the air blown from the molten resin sheet 10 from the air knife 12 and the polishing roll.
The surfaces of the polishing rolls 8a, 8b, 8c are transferred to the surface of the sheet to give the sheet 10 smoothness and gloss.

Following the sheet cooling take-up machine 7 described above,
Annealing machine 1 including a plurality of annealing rolls 9a to 9d
5 is provided, and the sheet 10 to which smoothness and gloss have been imparted in the sheet cooling and pulling machine 7 is reheated by means such as hot water to prevent the sheet 10 from being curled or otherwise distorted. Then, the sheet 10 is finally wound up by the winding machine 11 through the accumulation rate 14. A series of means such as the extruder 4, the sheet cooling and take-up machine 7, the annealing machine 15 and the like are arranged on the floor surface 13 extending from the extruder 4 on an extension line.

[0006]

As described above, in the conventional sheet manufacturing apparatus, a series of means such as the sheet cooling / drawing machine 7 and the annealing machine 15 are arranged on the extension line from the extruder 4. Therefore, it is necessary to secure a large floor area for installing the sheet manufacturing apparatus. Also, since heating and cooling are repeated during the sheet manufacturing process,
There is much waste in terms of thermal efficiency.

Therefore, the present invention has been made in view of the above problems. First, the space for the installation floor of the seat manufacturing apparatus is saved, and the seat is manufactured with a simple structure and good operability. The first object is to provide an apparatus, and the second object is to provide a sheet manufacturing apparatus that achieves high thermal efficiency.

[0008]

The present invention adopts the following means in order to solve the above-mentioned problems. <Summary of the Invention> The present invention relates to a cylinder mounted on a base, a heater surrounding the outer peripheral surface of the cylinder, a screw rotatably inserted in the cylinder, and a thermoplastic resin raw material. An extruder equipped with a raw material inlet for supplying the inside of the base of the cylinder; a die attached to the tip of the extruder to mold the resin flowing out of the extruder into a predetermined molten sheet; A sheet cooling take-up machine that cools a molten sheet and imparts smoothness and luster; an annealing machine that is provided subsequent to the take-up machine; a take-up sheet that winds a sheet that is distorted by the annealing machine that is provided after the annealing machine In a sheet manufacturing apparatus in which the sheet cooling apparatus, the sheet cooling and pulling machine, the annealing machine, and the winding machine are rotated after the die. A sheet manufacturing apparatus comprising attached to the base.

[Cylinder] In the present invention, the cylinder has a screw rotatably incorporated therein. The screw incorporated inside has a single-screw inserted, or two screws meshed together,
Alternatively, a multi-screw type in which the outer diameters of two screws are in contact with each other is included. The cylinder may be provided with one or more vents to discharge the water content contained in the raw material resin. Further, from the viewpoint of thermal efficiency, it is preferable that the cylinder is housed in the cylinder together with the heater that heats the cylinder.

[Die] In the present invention, the die attached to the tip of the cylinder is a T-die, a straight manifold type is used for molding at a relatively low speed, and a vinyl chloride resin having low thermal stability and fluidity. For example, it is preferable to use a coat hanger manifold type. Further, it is preferable to tilt the tip of the die inwardly by a predetermined angle with respect to the axis of the cylinder of the extruder in order to tumble-incorporate the means installed subsequently to the die.

[Sheet Cooling and Pulling Machine] In the present invention, the sheet cooling and pulling machine comprises a plurality of polishing rolls, and an air knife, a rubber touch roll or a metal touch roll is provided at a position close to the lip of the die.
Then, an air knife or a rubber touch roll is used to manufacture a thin sheet of 0.3 mm or less, and in the case of an air knife, air is blown from the outside of the polishing roll. A metal touch roll is preferably used to manufacture a sheet having a thickness of 0.3 mm or more.

[Annealing Machine] In the present invention, the annealing machine reheats the sheet in order to prevent the occurrence of distortion such as curl in the sheet to which smoothness and gloss have been imparted by the sheet cooling and drawing machine. Is. Usually, a plurality of heating rolls are arranged, and the sheet is passed through the heating rolls to correct the distortion.

<Materials Used in the Extruder of the Present Invention> Thermoplastic resin materials used in this extruder include polyolefin resins such as polypropylene, polyethylene and polybutene, styrene resins such as polystyrene and ABS, polyamide, Polyethylene terephthalate, polyacetal, polyvinyl chloride, other thermoplastic resin simple substance or mixture thereof, talc, calcium carbonate, mica, glass fiber, carbon fiber and the like fillers and antioxidants, pigments, flame retardants, plasticizers Examples of the composite material include one or more additives such as

<Operation of Essential Components of the Present Invention> According to the present invention, the molten sheet that has flowed out of the extruder through the die is rotated around the base and sent to the sheet cooling and take-up machine provided on the base. In this sheet cooler, the sheet is cooled by passing it through a plurality of polishing rolls, and a thin sheet having smoothness and gloss is formed.

Further, when this sheet enters the annealing machine provided on the base, it is prevented from being reheated and curled. Finally, the sheet is wound by the winding machine located on the rear end side of the base. In this way, from the charging of the raw materials to the winding of the product sheet, the base is rotated.

<Additional Constituent Requirements in the Present Invention> The present invention is composed of the above-mentioned essential constituent elements, but is also realized by adding the following constitutions.

That is, in addition to the essential components, the annealing machine is further arranged at a position corresponding to the extruder, and it is possible to provide an attracting means for guiding the heat of the cylinder heating heater to the annealing machine. . This attracting means can be exemplified by a blower that preferably guides heat from a heater that heats the cylinder, and a conduit that leads from this blower to the annealing machine. In this way, it is preferable from the viewpoint of energy saving that the hot air after the air cooling of the cylinder is guided to the annealing machine.

<Operation when Additional Components are Added> The temperature of the thermoplastic resin in the cylinder rises more than necessary due to shear heat generation as it goes to the tip of the cylinder, so cool the cylinder. Temperature control is performed on the cylinder. Further, when this sheet enters the annealing machine provided on the base, the hot air generated after controlling the temperature of the cylinder is sent to the sheet via the attracting means. The sheet is annealed while being reheated by the heat of this warm air. Thus, the sheet is prevented from curling.

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

[0020]

First Embodiment A first embodiment will be described with reference to FIG. [Outline of First Embodiment] In the first embodiment, a cylinder 2 mounted on a base, a heater 3 surrounding the outer peripheral surface of the cylinder 2, and a screw rotatably inserted into the cylinder 2. 16 and an extruder 4 provided with a raw material supply port 5 for supplying a thermoplastic resin raw material into the inside of the cylinder 2; further, a resin attached to the tip of the extruder 4 and flowing out from the extruder 4 is predetermined. A die 6 for forming the melted sheet 10 of the above; a sheet cooling take-up machine 7 attached to the base 1 so as to turn around the die 6, an annealing machine 15, a winding machine 11 and the like.

[Description of Extruder] A cylinder 2 is mounted on the base 1, and a screw 16 is rotatably inserted into the cylinder 2. Further, a heater 3 is installed on the outer peripheral side of the cylinder 2 to form the main body of the extruder 4. In this embodiment, the cylinder 2 and the heater 3 are housed in the heater cover 28 and the outer cylinder 17 to prevent heat radiation. Further, a hopper 5 which is a funnel-shaped raw material supply port is attached to the starting end side of the cylinder 2, and a prime mover 18 for rotating and driving the screw 16 is mounted on the base 1 further rearward of the hopper 5. . The cylinder 2 is provided with a vent 19 for discharging water and the like contained in the raw material resin.

[Description of Screen Changer] A hydraulic automatic screen changer 20 is attached to the tip of the cylinder 2. When a recycled product is mixed in the raw material, this screen changer removes dust mixed in the recycled product to prevent deterioration of quality, surging, or venting up, thereby improving productivity. The screen changer 20 is not an essential component of the present invention.

[Description of Die] Following the hydraulic automatic screen changer 20, the T-die 6 whose axis is inclined downward by 45 degrees is attached. For this reason, it becomes possible for the means provided subsequent to the die to rotate and be arranged on the base 1. Further, the T-die 6 of this embodiment uses a coat hanger manifold type.

[Explanation of sheet cooling take-up machine]
Following the die 6, a sheet cooling take-up machine including a plurality of polishing rolls 8 a, 8 b, 8 c, and 8 d is provided on the front projecting portion 21 of the base 1 toward the inside of the base 1. An air knife 22 is provided at a position close to the lip 6a of the T die 6, and the polishing roll 8a
Blow air from outside. With this structure, a sheet or film having a smoothness and gloss of 0.3 mm or less is manufactured.

[Description of Annealing Machine] An annealing machine 15 is formed inside the base 1 after the sheet cooling and drawing machine 7 described above. The annealing machine 15 is a cylinder 2 of the extruder 4.
Which is located immediately below the hot air oven 29 and a large number of guide rolls 9c, 9d and 9e provided between the pinch rolls 9a and 9b, and the sheet 10 is stretched over the large number of guide rolls. Further, after the cylinder 2 is air-cooled, the hot air passing between the heater 3 and the heater cover 28 is guided into the hot air oven 29 by the conduit 24, and the sheet 10 having the smoothness and gloss provided by the sheet cooling device is set in the annealing machine 15. While reheating, the sheet is prevented from being distorted such as curl.

[Description of Sheet Reheating Device] A plurality of blowers 23a, 23b, and 23c, which are attracting means, are attached to the heater cover 28 of the cylinder 2. Further, the conduit is composed of a plurality of conduits 24a, 24b, 24c which reach the sheet 10 passing through the hot air oven 29, and work together with the blower as an attracting means. With such a configuration,
After the temperature of the cylinder 2 is controlled by air-cooling the cylinders by the blowers 23a, 23b, and 23c, this hot air is sent by the blower and further drawn into the hot air stove 29 by the conduit 24.

[Description of Winding Machine] The winding device 11 is provided on the rearwardly extending portion 26 of the base 1. In this embodiment, a twin-screw turret type is used for this winding machine. In addition, the winding machine 1 goes through the accumulation rate.
1 can also be provided.

[Operation / Effect of Embodiment 1] The thermoplastic resin supplied from the raw material supply port 5 into the cylinder 2 is heated by the heater 3 from the outer peripheral surface of the cylinder 2 to be melted, and by the rotation of the screw 16. It is pushed out from the tip of the cylinder 2. Since the temperature of the thermoplastic resin in the cylinder 2 rises excessively with shear heat generation as it goes to the tip of the cylinder 2, the blowers 23a, 23b.
Air is sent to the cylinder 2 from 23c to cool the cylinder by air, and temperature control is performed to maintain the raw material resin at a desired temperature.

The sheet 10 in a molten state passes through the auto screen changer 20 and is turned from the T die 6 to flow out to the sheet cooling / drawing machine 7 provided on the base 1. At that time, the air knife 22 blows air from the outside of the polishing roll 8a onto the sheet in the molten state. After that, the molten sheet 10 is polished by the polishing rolls 8a, 8b, 8c, 8
By passing through d, the thin sheet 10 is cooled and has smoothness and gloss.

Further, when the sheet 10 enters the annealing machine 15 between the pinch rolls 9a and 9b provided inside the base 1, hot air generated after cooling the cylinder 2 and controlling the temperature is generated. Blowers 23a ・ 23b ・
Hot air stove 2 from 23c through conduits 24a, 24b, 24c
9 is heated to heat the sheet 10. The sheet 10 is reheated by this hot air and is guided by the guide rolls 9c, 9d, 9e.
Pass through. Thus, the sheet 10 is prevented from being curled or otherwise distorted. Finally, the sheet 10 is wound up by the winding machine 11 located on the rear end side of the base 1.

In this way, from the charging of the raw materials to the winding of the product sheet 10, the base 1 is arranged to rotate. Therefore, the space occupied on the floor of the device itself is significantly reduced, and the effect of space saving is great. Moreover, since the hot air after the temperature control is performed by cooling the cylinder 2 is directly used for annealing,
It is advantageous in terms of thermal efficiency and largely contributes to energy saving. Further, since the raw material charging position and the finished product discharging position are adjacent to each other, the device can be easily handled and the operating performance is improved. Further, in the case of a thin sheet having a thickness of 0.3 mm or less, it is possible to prevent the sheet from meandering and vertical wrinkles by using a large number of guide rolls as described above.

[0032]

Second Embodiment A second embodiment will be described with reference to FIG. [Outline of Embodiment 2] In this embodiment, a metal touch roll 27 is provided at a position close to the lip 6a of the T die 6 in the sheet cooling and take-off machine, and a pair of pinch rolls 9a and 9b is provided in the annealing machine. Since it has the same structure as that of the above-described first embodiment except that there is a difference in structure in respect of this point, the difference will be mainly described.

[Explanation of sheet cooling take-up machine]
Subsequent to the die 6, a sheet cooling take-up machine including a plurality of polishing rolls 8a, 8c, 8d is provided on the front projecting portion 21 of the base 1 toward the inside of the base 1.
A metal touch roll 27 is provided at a position close to the lip 6a of the T die 6, and the polishing roll 8a is provided.
The metal touch roll 27 is uniformly touched from the outside. With this structure, 0.3m with smoothness and luster
Sheets of m or more are produced.

[Description of Annealing Machine] An annealing machine 15 is formed inside the base 1 after the sheet cooling and take-up machine 7. The annealing machine 15 is a cylinder 2 of the extruder 4.
Pinch rolls 9a located right below and right and left
-It is constituted by the hot air oven 29 between 9b. The sheet to which smoothness and gloss have been imparted by the sheet cooling / collecting machine 7 is
While being reheated in the annealing machine 15, the pinch roll 9a
・ Pass while being moderately tensioned between 9b.
Therefore, the sheet 10 is annealed to prevent distortion such as curling.

[Operation / Effect of Embodiment 2] This embodiment is suitable for manufacturing a sheet having a thickness of 0.3 mm or more, and the structure is simplified by using a pair of pinch rolls before and after the annealing machine. Except for the point described above, it has substantially the same operation and effect as the first embodiment.

[0036]

According to the essential components of the present invention, the sheet cooling take-up machine, the annealing machine, the winding machine and the like are mounted on the base so as to rotate after the die. The area is small, which contributes to space saving.

2) Since the charging of raw materials and the taking-out of products are close to each other, the handling of the apparatus is simplified and the operability is improved. According to the additional components, 3) the annealing machine is arranged at a position corresponding to the cylinder of the extruder, and is provided with an attracting means for guiding the heat of the heater for heating the cylinder to the annealing machine. The effect is great.

The following effect is produced.

[Brief description of drawings]

FIG. 1 is a partially cut side view of a first embodiment of a sheet manufacturing machine according to the present invention.

FIG. 2 is another embodiment 2 of the sheet manufacturing machine according to the present invention.
It is a partially cut side view of FIG.

FIG. 3 is a partially cut side view of a conventional product.

[Explanation of symbols]

 1 Base 2 Cylinder 3 Heater 4 Extruder 5 Raw Material Supply Port 6 Die 7 Sheet Cooling Take-off Machine 10 Sheet 11 Winding Machine 15 Annealing Machine 16 Screw 23 Blower (Attracting Means) 24 Conduit (Attracting Means)

Claims (2)

[Claims] 1. A cylinder (2) mounted on a base (1), a heater (3) surrounding the outer peripheral surface of the cylinder (2), and rotatably inserted in the cylinder (2). Extruder (4) equipped with a screw (16) and a raw material supply port (5) for supplying a thermoplastic resin raw material into the inside of the cylinder (2); mounted on the tip of the extruder (4) A die (6) for molding the resin flowing out from the extruder (4) into a molten sheet (10); a sheet cooling take-off machine for cooling the sheet (10) flowing out of this die and imparting smoothness and gloss (7); Annealing machine (15) provided after the sheet take-up machine (7); The annealing machine (1) provided after the annealing machine (15)
5) In a sheet manufacturing apparatus in which a winding machine (11) for winding the sheet (10) in which distortion has been prevented by the above is sequentially arranged; a sheet cooling take-up machine (7) following the die (6); The annealing machine (15), the winding machine (1
1) A sheet manufacturing apparatus, characterized in that it is attached to the base (1) so as to rotate. 2. The annealing machine (15) is arranged at a position corresponding to a cylinder (2) of the extruder (4), and heat of a heater (3) for heating the cylinder (2) is annealed. Attracting means (23), (24) for guiding to the machine (15)
The sheet manufacturing apparatus according to claim 1, further comprising: