JP2003170429A - Method for cutting molded article in extrusion molding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for cutting the molded article in an extrusion molding machine capable of always manufacturing a molded product having predetermined length even if the supply amount of waste from a feeder is changed, and capable of being operated without stopping a disintegration means. <P>SOLUTION: In the method for cutting the molded article, finely crushed waste 12 based on a plastic is supplied to the extrusion molding machine 10 by the feeder 15, of which the supply amount can be changed by the number of rotations of a screw 14, to be semi-melted in the extrusion molding machine 10. The molded article 23 is extruded from a nozzle 22 provided to the leading end of the extrusion molding machine 10, and cut into the predetermined length by the disintegration means 25 equipped with a rotary edge tool 24 to manufacture a lumpy molded product 26 usable as a coke raw material. In this cutting method, the number of rotations N<SB>b</SB>of the edge tool 24 is automatically controlled corresponding to an increase or decrease in the set number of rotations N<SB>a</SB>of the screw 14. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supplies, for example, plastic general waste such as separated household waste to an extrusion molding machine so that it can be used as a coal substitute raw material for coke oven equipment and is made into a somewhat molten state. The present invention relates to a method for cutting a molded product in an extrusion molding machine for manufacturing a coke raw material by cutting the molded product molded into a predetermined length.

[0002]

2. Description of the Related Art Conventionally, in the production of molded products by an extrusion molding machine, the purpose is to reduce the volume of general plastic waste by molding and then to landfill it.
Quality control (size, bulk specific gravity, lump ratio) of molded products was not performed. In addition, even if an attempt is made to mold a product of a certain length, a large number of rod-shaped molded products extruded from a large number of nozzles equipped with extrusion ports by melting the thermoplastic resin contained in the waste in an extrusion molding machine It was not possible to make the lengths of the molded products uniform, because the molded products with a short length were formed by breaking off with a breaking machine. Also, when the temperature of the thermoplastic resin in the extrusion molding machine is high, the waste was discharged in an excessively melted state, so it was bent when broken by the breaking machine, and from other nozzles. It sometimes adhered to the extruded molded product. Such a molded product having a non-uniform length and shape is difficult to convey and quantitatively cut out, and it is difficult to use it as a raw material for a coke oven. The waste is supplied to the extrusion molding machine by a screw type constant quantity supply machine installed on the upstream side.

[0003]

In order to solve the above-mentioned problems, the applicant of the present invention has disclosed in Japanese Patent Application No. 2000-387774 a shield plate which can contact a large number of molded products extruded from the nozzle on the downstream side of the nozzle. The present invention proposes an extrusion molding machine characterized in that it is provided with means for cutting a large number of molded products that are in contact with the shield plate with a plurality of blades attached to a rotary boss so that their lengths are aligned. Hereinafter, this means in which a plurality of (four in the embodiment) blades are attached to the rotary boss will be referred to as a breaking means. In this demolition means, an electric motor is connected to each of a pair of rotating bosses provided corresponding to a pair of screws provided in the extruder, and the electric motor is rotated at a constant speed in normal operation. .

However, the method of cutting a molded product in this extrusion molding machine still has the following problems to be solved. In a normal operation, the screw-type fixed-quantity feeder keeps the blade of the demolition means rotating at a constant speed.However, for example, when the amount of water in the waste is high, the temperature of the thermoplastic resin in the extruder may be high. Therefore, it was necessary to reduce the amount of waste supplied from the constant quantity feeder. Further, when the waste stored in the constant quantity feeder becomes full, it is necessary to increase the rotation speed of the screw of the constant quantity feeder for a certain period of time to increase the throughput of the constant quantity feeder. In this way, in the operation that requires changing the rotation speed of the screw of the constant quantity feeder to change the extrusion speed, if the rotation speed of the blade remains constant, the length of the molded product cut by the blade is changed to a predetermined length. Therefore, the operator must manually adjust the rotational speed of the blade via the electric motor of the breaking means according to the increase or decrease in the extrusion speed of the molded article in the extrusion molding machine. There is a problem in that the length of the molded product varies in order to adjust the number of rotations. Also, when the temperature of the molded product rises due to the change in the composition of the waste, the viscosity of the molded product increases and it becomes difficult to cut the molded product with the blade, which causes the motor to become overloaded and There was also a problem that the means of breaking would stop.

The present invention has been made in view of the above circumstances, and it is possible to always manufacture a molded product of a predetermined length even if the amount of waste supplied from the feeder changes, and to stop the breaking means. An object of the present invention is to provide a method for cutting a molded product in an extrusion molding machine which can be operated without any operation.

[0006]

According to the present invention, there is provided a method for cutting a molded product in an extrusion molding machine according to the above object, in which a finely crushed plastic main body is discarded by a feeder whose supply amount is variable depending on the number of rotations of a screw. The material is supplied to an extrusion molding machine, the waste is semi-melted in the extrusion molding machine, the molding is extruded from a nozzle provided at the tip, and the demolition means is provided downstream of the nozzle and has a rotating blade. A method of cutting a molded product in an extrusion molding machine, which cuts a molded product into a predetermined length to produce a block-shaped molded product that can be used as a raw material for coke, and is capable of controlling the rotation speed of a screw. Device, blade rotation control device that can control the rotation speed of the blade, setting of the rotation speed of the screw, instruction to the screw rotation control device of the rotation speed of the screw, The number of revolutions of the screw according to the number of revolutions of the blade, and the total number of revolutions of the screw set by the overall control device are provided with the integrated control device that can instruct the blade rotation control device of the calculated number of revolutions of the blade The rotation speed of the blade is automatically controlled according to the increase or decrease of. As a result, even if the amount of waste supplied from the feeder changes due to some factor, the number of revolutions of the rotating blade of the disintegration means changes according to the change in the extrusion speed of the extruded product from the extruder. Adjusted automatically.

In the method of cutting a molded product in an extrusion molding machine according to the present invention, the blade rotation control device is provided with a function of detecting a current value of an electric motor for driving the blade and transmitting the current value to the integrated control device. In the control device, the threshold value of the electric current value of the electric motor that determines the state in which the molded product is difficult to cut due to the increase in viscosity with the temperature rise of the molded product is preset, and the measured current of the electric motor measured by the blade rotation control device. When the value exceeds the threshold value, it is possible to prevent the overload of the electric motor by instructing the blade rotation control device to rotate at high speed and cutting the molded product. This makes it possible to automatically prevent the electric motor of the breaking means from being overloaded even when it becomes difficult to cut the molded product. In the method for cutting a molded product in an extrusion molding machine according to the present invention, a shielding plate is provided on the downstream side of the nozzle to contact the molded product with a predetermined gap from the nozzle, and molding is gradually extruded from the nozzle. It is also possible to apply an object to the shield plate and adjust the protruding length thereof, and then cut the molded product by the breaking means to make the lengths uniform. As a result, the molded product is applied to the shield plate to adjust the maximum protruding length of the molded product, so the molded product with a high extrusion speed from the nozzle waits until the tip of the molded product with a slow extrusion speed reaches the shield plate. Thus, the maximum length of the molded product to be cut can be made uniform by absorbing the difference in the extrusion speed from each nozzle.

In the method of cutting a molded product in the extrusion molding machine according to the present invention, the molded product extruded from the nozzle can be cooled. As a result, the molded product extruded from the nozzle may not be solidified in some cases, so if you try to cut it as it is, a bent and deformed molded product may be formed. Can be solidified so that it can be cut without bending. Further, it is possible to prevent the formed moldings from adhering to each other to be integrated, and it is possible to suppress the generation of dust.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, referring to the attached drawings, an embodiment in which the present invention is embodied will be described to provide an understanding of the present invention. FIG. 1 is an overall configuration diagram including an extrusion molding machine to which a method of cutting a molded product in an extrusion molding machine according to an embodiment of the present invention is applied, and FIG. 2 is a front sectional view of the extrusion molding machine.

As shown in FIG. 1, an extrusion molding machine 10 to which a method for cutting a molded product in an extrusion molding machine according to an embodiment of the present invention is applied is such that an upstream device (not shown) transfers a hopper 11 to the hopper 11. It is arranged below a feeder 15 that feeds and stores the shredded plastic-based waste 12 that is thrown in and stored into the extrusion molding machine 10 by the screw 14 of the screw feeder 13 arranged in the lower part of the hopper 11. . The screw 14 of the screw feeder 13 of the feeder 15 is rotated by an electric motor 16 which is an example of a screw rotation drive source, and the supply amount of the waste 12 is variable depending on the rotation speed of the screw 14. As shown in FIGS. 1 and 2, in the extrusion molding machine 10, the waste material 12 in the casing 17 is extruded by the screws 20, 21 of the pair of screw feeders 18, 19 to be compressed and semi-molten, and the tip portion thereof. A plurality of (four in the present embodiment) blades 24, which are extruded into a rod-shaped molded product 23 from the plurality of nozzles 22 provided in the above, are disposed on the downstream side of the nozzles 22 and rotate, and the blade is rotationally driven. The crushing means 25 having a pair of electric motors 30 and 31 as an example of the source cuts to a predetermined length to produce a block-shaped molded product 26 that can be used as a coke raw material. Hereinafter, a detailed description will be given with reference to the drawings.

As shown in FIG. 1, the screw of the feeder 15 is
-The electric motor 16 for driving the feeder 13 has an electric motor.
Rotational speed n of the motor 16_a Screw rotation control device that controls
The device 36 is connected to the screw rotation control device 36.
Screw set by the integrated controller 37 connected to the
-14 rotation speed N_a The rotation speed n of the electric motor 16 according to
_a Is transmitted to the screw rotation control device 36, and the electric motor
The screw 14 via the motor 16 and a speed reducer (not shown).
Is the number of revolutions N_a It is configured to rotate with. on the other hand,
Rotational speed of the screw 14 set by the integrated control device 37
N_a Is the number of rotations n of the electric motors 30, 31_b Is automatically performed
Is calculated, and integrated control device 37 and electric motors 30 and 31 are calculated.
The electric motors 30, 3 are connected to the connected blade rotation control device 34.
Number of revolutions 1_b Is transmitted to the electric motors 30, 31 and
And the number of revolutions of the blade 24 is N through a speed reducer (not shown)._b Times
It is configured to roll. Specific speed relationship
Is N _b = ΦN_a Control as. Here, the value of φ is
Since there are multiple nozzles 22, each nozzle 22
There is some variation in the extrusion speed of the molded product 23
And the rotation speed N of the screw 14_a And the rotation speed of the blade 24
N_b Of the length distribution of the molded product 26 obtained by changing various values
From the values, we ask for products with an optimal size distribution.
It is a constant or variable.

Referring to FIGS. 1 and 2, an extrusion molding machine 10 is provided.
The structure of will be described in detail. At the top of the casing 17 of the extruder 10, waste 12 from the feeder 15
Is provided with an opening 27 through which a pair of screw feeders 18, 19 are provided.
Screws 20 and 21 are horizontally arranged with their axes parallel to each other. A rectangular thick plate-shaped die plate 28 is attached to the downstream end (tip portion) of the casing 17, and the die plate 28 has a large number of nozzles 22.
Are provided on a suitable circumference centered on the axis O of the screws 20, 21 at predetermined intervals (100 or more). The die plate 28 is provided with a heater (not shown), and the waste 12 introduced through the opening 27 is discharged.
Is that the thermoplastic resin contained in the plastic in the waste 12 is melted by frictional heat generated by the rotation of the screws 20 and 21 (constant rotation speed) in normal operation, and by heating by the heater at the start of operation. Become. An extrusion port 29 is formed so as to penetrate through each nozzle 22 in the flow direction of the waste 12, and the waste 12 in which the thermoplastic resin has been melted has a cross-sectional shape that matches the extrusion port 29, and the die plate is formed. A continuous molded product 23 is formed by projecting in a rod shape downstream of 28 and solidified.

With reference to FIGS. 1 and 2, the structure of the breaking means 25 provided for cutting the continuous molded product 23 protruding from the extrusion port 29 of the nozzle 22 will be described.
A pair of electric motors 30, 31 is provided on the downstream side of the nozzle 22.
A pair of rotary bosses 32 and 33, which are respectively connected to, are provided to face the pair of screws 20 and 21 with their axes aligned. The tips of the rotating bosses 32 and 33 (waste 12
Upstream of the flow direction), the blades 24 each having an edge formed in the circumferential direction are arranged on the same plane as shown in FIG.
It is provided one by one. Each cutting tool 24 corresponds to each rotating boss 3
It is attached so as to project radially outward from the axial center of the shafts 2, 33 (same as the axial center O of the screws 20, 21) and further offset in the same circumferential direction (for example, the clockwise direction). The distance K between the centers of the rotating bosses 32 and 33 is determined by the blade 2
Although it is smaller than twice the length H of 4, even if the rotary bosses 32 and 33 rotate in mutually opposite directions, the blades 24 do not interfere with each other. Each blade 24 has an electric motor 30,
It is possible to simultaneously cut a large number of molded products 23 that rotate by 31 and pass within the circle described by the locus of the cutting edge of the cutting tool 24.

As shown in FIG. 1, the blade rotation control device 34.
Ammeter is installed in the
The current value I of 1 is measured and the signal is sent to the integrated control device 37.
Can be communicated. Molded product 23 for some reason
Temperature rises, and as a result, the viscosity of the molded product 23 increases.
Then, it becomes difficult to cut the molded product 23.
The combined current value I becomes larger than the normal value and due to overload
The electric motors 30 and 31 may be stopped. For this reason,
The integrated control device 37 determines the current value I of the electric motors 30 and 31.
Electric motors 30 and 31 that are constantly monitored and preset
Current value threshold I ₀ If it is more than a certain time
Instruct the blade rotation controller 34 to rotate at high speed,
The object 24 is rotated at high speed (for example, at a normal speed of 30 rpm).
In case of high speed n_h Is about 100 rpm). Well
Also, even after a certain period of time, I ≧ I₀ Then, at the same time
Continue to instruct high speed rotation only for a while. Molding in this way
By cutting the object 23, the electric motors 30 and 31 are
It is controlled to prevent stopping due to overload.

On the downstream side of the blade 24 (on the base side of the rotary bosses 32, 33), there is provided a shield plate 35 on which the molded products 23 extruded from the extrusion ports 29 of the plurality of nozzles 22 can abut. , 33 are inserted therethrough. A shield plate 35 having substantially the same size as the die plate 28 is fixed to a mounting member (not shown). The shield plate 35 is provided so as to be movable in the axial direction of the rotary bosses 32 and 33, and can be fixed at a set position. With such a configuration, a large number of the molded products 23 abutting on the shield plate 35 can be cut off by the blade 24.
To make a uniform length and cut the molded product 26 with a uniform length.
Can be formed in large numbers. A large number of molded products 23 protruding from each nozzle 22 have different extrusion speeds, but the molded products 23 having a high extrusion speed do not project further when the tip is in contact with the shielding plate 35, and the extrusion speed is high. It waits until the molded product 23 that is slow reaches the shield plate 35.

In this embodiment, since the waste material 12 mainly composed of shredded plastic is used as a raw material, when the water content is large or the bulk specific gravity becomes large due to the degree of drying, It is necessary to reduce the throughput of the waste 12 in consideration of melting due to heat generation in the extruder 10. Therefore, it is necessary to reduce the rotation speed of the screw 14 of the screw feeder 13 of the feeder 15 to reduce the amount of the waste 12 supplied to the extrusion molding machine 10. If the rotation speed of the screw 14 is not decreased and is kept as it is, the slowly extruded molded product 23 is cut into shorter pieces than a predetermined length. Therefore, according to the slow extrusion speed of the molded product 23 extruded from the extrusion molding machine 10, the rotation speed N _b of the blade 24 is reduced based on the above-described formula of N _b = φN _a , so that the constant length is reduced. It is possible to manufacture the molded product 26 of the sea urchin.

Next, the structure for cooling and solidifying the molded product 23 before cutting will be described. As shown in FIG. 1, the nozzle 22 is provided on the downstream side of the die plate 28.
A jet nozzle 38 for jetting water, which is an example of a cooling fluid, in a mist state and solidifying it toward the molded product 23 extruded in a continuous state from a large number of nozzles 22 is provided at a position below. Above the die plate 28 and the blade 24, the water and the molded product 23 jetted from the jet nozzle 38 are formed.
Suction duct 39 capable of sucking water vapor generated by the heat of
Is provided. The position of the jet nozzle 38 is the blade 24
It is located at a lower position on the upstream side of the drop path 40, avoiding the drop path 40 of the molded product 26 cut by. The ejection nozzle 38 is positioned below the molded product 23, and each molded product 23 extruded from each nozzle 22 is inserted into the blade 24.
It can be placed anywhere as long as water can be sprayed before cutting with, and it is also possible to place it in multiple places. The water jetted upward from the jet nozzle 38 lowers the temperature of the molded product 23 extruded from the nozzle 22 to promote solidification, and the cutting by the blade 24 can be easily performed.

A large amount of powder is contained in the solidified molded product 23, and a lot of dust is generated when cutting with the blade 24, but it is generated by jetting water upward from the jet nozzle 38. By attaching water to the dust, the amount of dust floating in the air can be reduced, and by moving the water and dust upward toward the suction duct 39, suction of dust and water vapor by the suction duct 39 can be achieved. Can be done easily. The water jetted at this time is jetted as water droplets of a size that can be sucked by the suction force of the suction duct 39. With this configuration, the jetted water drops and wets the floor around the extrusion molding machine 10. Can be prevented. Although the amount of water contained in the molded product 26 to be molded increases due to the water attached to the molded product 23, there is no problem with the quality of the coke raw material. Further, as the cooling fluid, for example, air, water, or a mixed fluid thereof can be used.

Next, the outline of the method for cutting the molded product in the extrusion molding machine according to the embodiment of the present invention will be described. (Raw material charging and melting step) (1) The operation of the extrusion molding machine 10 is started, and the heater is operated to raise the temperature of the die plate 28. (2) The electric motor 16 of the feeder 15 is driven to rotate the screw 14, and the waste 1 stored in the hopper 11 is discharged.
2 is continuously charged into the opening 27 of the extrusion molding machine 10 by a constant amount. (3) The waste 12 charged into the extruder 10 is transferred to the downstream side in the casing 17 by the rotation of the screws 20 and 21 at a constant speed, and is a thermoplastic resin contained in at least a part of the waste 12. But the screws 20, 2
The semi-molten waste 12 that is melted by the frictional heat caused by the sliding with 1 and the heating by the die plate 28 is extruded from the extrusion ports 29 formed in the multiple nozzles 22 of the die plate 28. The operation of the heater is stopped during normal operation.

(Cooling and Length Adjustment Step) (4) Water is jetted from the jet nozzle 38 to the extruded molded product 23 to solidify it. The amount of water ejected can be adjusted according to the cutting state of the blade 24. That is, when the molded product 23 or the molded product 26 has many bends, the amount of water is increased to promote the solidification, while the powdered material increases during the solidification to easily collapse the molded product 23 or the molded product 26. In some cases, the amount of water is reduced to form a little softer. (5) A large number of molded products 23 gradually extruded from the nozzles 22 are applied to the shielding plate 35 disposed on the downstream side of the nozzles 22 with a predetermined gap between them, and the protruding length thereof That is, the maximum length is adjusted by the fixed position of the shielding plate 35. At this time, the blades 24 provided on the rotary bosses 32 and 33 continuously rotate or each of the moldings 23
It is stopped at a position avoiding.

(6) In the normal operation, the rotation speed of the electric motor 16 of the feeder 15 remains at the normal rotation number, but the extruder 12 is extruded from the feeder 15 due to factors such as the amount of water in the waste 12. When the supply amount of the waste 12 to the machine 10 is reduced by a manual operation, as described above, the rotation speed N _b of the blade 24 is automatically changed according to the decrease amount of the rotation speed of the electric motor 16.
The electric motors 30, 31 of the demolition means 25 so as to drop the
Is reducing the number of revolutions. In this way, the length of the molded product 26 is controlled to be always constant. (7) The average length of the molded product 26 is adjusted by adjusting the speeds of the electric motors 30 and 31 that rotate the blade 24. That is, when the rotation speeds of the electric motors 30 and 31 are increased, the number of the molded products 23 protruding until they hit the shield plate 35 is reduced, and the molded product 26 cut by the blade 24 is cut.
On the other hand, when the rotation speed of the electric motors 30 and 31 is slowed down, the number of molded products 23 protruding until they hit the shield plate 35 increases, and the average length of the molded product 26 increases. Even when the electric motors 30 and 31 are operated intermittently, the length of the average length of the molded product 26 can be adjusted by adjusting the length of the operating and stopping intervals. In either case, the maximum length of the molded product 26 is equal to the distance between the blade 24 and the shield plate 35.

(Cutting and Post-Processing Step) (8) After adjusting the protruding length of the molded product 23, the electric motors 30 and 31 are operated under the same operating conditions as the adjustment, and continuous molding is performed by the rotating blade 24. The product 23 can be cut to make the molded products 26 uniform in length. (9) For some reason, the viscosity of the molded product 23 increases due to the temperature rise of the molded product 23, or, for example,
Since the rotational speed of the blade 24 becomes small and the inertial force of the rotating blade 24 is small, the molded product 23 cannot be cut (specifically, the molded product is entangled with the blade 24). When the current value I of the motors 30 and 31 exceeds the threshold value I ₀ , the blade 24 is automatically rotated at a high speed for a fixed time (for example, 10 seconds) (for example, 100 rpm) to cut the molded product 23. By electric motor 3
Prevents 0 and 31 from stopping due to overload. (10) The cut molded product 26 falls below the ejection nozzle 38, is accumulated, and is transferred.

In the present embodiment, the electric current value I of the electric motors 30, 31 of the breaking means 25 is set to the blade rotation control device 3.
4, the electric motors 30 and 31 are rotated at high speed when the current value I becomes equal to or more than the threshold value I _o . However, the present invention is not limited to this, and the electric motor 30 may be used as necessary. , 31 may be omitted, and the above control may be omitted. In order to make the length of the molded product 26 as uniform as possible, the molded product 23 extruded from the nozzle 22 is configured to contact the shield plate 35, but the present invention is not limited to this, and the shield plate 35 may be omitted. it can.
Although the high temperature molded product 23 extruded from the nozzle 22 is cooled and solidified, the present invention is not limited to this, and the molded product 23 may not be cooled depending on the situation.

The screw feeder 1 of the extrusion molding machine 10
Although the screws 20 and 21 of 8 and 19 are biaxial, they are not limited to this and may be monoaxial screws.
Although an electric motor was used as the rotation drive source of the feeder 15 and the demolition means 25, the invention is not limited to this, and a hydraulic motor or an air motor may be used if necessary. Four rotating blades 24 are provided on each of the rotating bosses 32 and 33, but the invention is not limited to this, and one to three blades or five or more blades may be provided.

[0025]

In the method for cutting a molded product in the extrusion molding machine according to claims 1 to 4, due to some factors,
Even if the amount of waste supplied from the feeder changes, the rotational speed of the rotating blade of the breaking mechanism is automatically adjusted according to the change in extrusion speed of the extruded product from the extruder. Even if the processing amount changes, the molded product is automatically cut into a predetermined length without relying on the operator's intuition, and it becomes possible to manufacture a molded product suitable for a coke oven raw material. . In particular, in the method for cutting a molded product in an extrusion molding machine according to claim 2, even if it is difficult to cut the molded product due to an increase in the viscosity accompanied by a temperature rise of the molded product, the electric motor of the demolition means may be overloaded. Since the load can be automatically prevented, stable operation of the demolition means becomes possible without stopping the demolition means due to overload.

In the method of cutting a molded product in the extrusion molding machine according to the third aspect, since the molded product is contacted with the shielding plate to adjust the maximum protruding lengths of many molded products,
It has become possible to manufacture molded products that are more suitable as raw materials for coke ovens. In the method for cutting a molded product in an extrusion molding machine according to claim 4, by cooling the molded product extruded from the nozzle, the molded product can be solidified so that it can be cut without bending, and Since it is possible to prevent the formed moldings from adhering to each other and integrating with each other, it is possible to manufacture a molded product with more stable quality. Also, since the amount of dust generated during cutting can be reduced, the working environment can be improved.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram including an extrusion molding machine to which a method for cutting a molded product in an extrusion molding machine according to an embodiment of the present invention is applied.

FIG. 2 is a front sectional view of the extrusion molding machine.

[Explanation of symbols]

10: Extruder, 11: Hopper, 12: Waste,
13: screw feeder, 14: screw, 15:
Feeder, 16: electric motor (screw rotation drive source),
17: casing, 18, 19: screw feeder,
20, 21: Screw, 22: Nozzle, 23: Molded product, 24: Blade, 25: Breaking means, 26: Molded product, 2
7: opening, 28: die plate, 29: extrusion port, 3
0, 31: electric motor (blade rotation drive source), 32, 3
3: Rotation boss, 34: Blade rotation control device, 35: Shielding plate, 36: Screw rotation control device, 37: Integrated control device, 38: Jet nozzle, 39: Suction duct, 40: Drop path

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C10B 53/00 C10B 53/00 B 53/08 53/08 // B29K 105: 26 B29K 105: 26 B29L 31 : 20 B29L 31:20 (72) Inventor Eiji Matsukuma 46-59 Nakahara, Tobata-ku, Kitakyushu, Fukuoka 46-59 Nippon Steel Corporation Engineering Business Headquarters (72) Inventor Yasuhiko Mori 46, Nakahara, Tobata-ku, Kitakyushu, Fukuoka −59 Nippon Steel Corporation Engineering Business Headquarters (72) Inventor Yoshihiro Harada 46 Nakazahara, Tobata-ku, Kitakyushu, Fukuoka 59 59 Nippon Steel Plant Design Co., Ltd. (72) Inventor Tetsuji Ibaraki 1 Kimitsu, Kimitsu, Chiba Prefecture Address Nippon Steel Stock Company Kimitsu Works (72) Inventor Motoki Ikeda 1 Kimitsu, Kimitsu City, Chiba Nippon Steel Co., Ltd. Tsu Steel Works (72) Inventor Tsuneo Ozeki 1 Kimitsu, Kimitsu City, Chiba Shin Nippon Steel Co., Ltd. Kimitsu Works F Term (reference) 4F201 AA50 AH81 AP08 AP15 AR07 AR09 AR12 BA01 BC01 BC12 BC25 BD05 BL08 BL25 BL37 BL42 4F207 AA50 AH81 AP08 AP15 KA01 KA17 KF01 KF12 KM04 KM14 KM16 KW23 4F301 AD10 BD09 BD25 BD29 BF16 BF31 BG57 4H012 EA00 HB09 KA04 KA06

Claims (4)

[Claims] 1. A crushed plastic-based waste material is supplied to an extrusion molding machine by a supply machine whose supply amount is variable depending on the number of revolutions of a screw, and the waste material is semi-melted in the extrusion molding machine, and a tip is formed. The molded product is extruded from a nozzle provided in the section, and is arranged on the downstream side of the nozzle,
A method for cutting a molded product in an extrusion molding machine for producing a block-shaped molded product which can be used as a coke raw material by cutting the molded product into a predetermined length by a breaking means equipped with a rotating blade, wherein the screw is used. A screw rotation control device capable of controlling the rotation speed of the blade, a blade rotation control device capable of controlling the rotation speed of the blade, setting of the rotation speed of the screw, to the screw rotation control device of the rotation speed of the screw , The operation of the rotational speed of the blade according to the rotational speed of the screw, and the integrated control device capable of instructing the blade rotation control device of the calculated rotational speed of the blade, the integrated control A method for cutting a molded product in an extrusion molding machine, wherein the rotational speed of the blade is automatically controlled in response to an increase / decrease in the rotational speed of the screw set by an apparatus. 2. The method of cutting a molded article in an extrusion molding machine according to claim 1, wherein the blade tool has a function of detecting a current value of an electric motor for driving the blade tool and transmitting the current value to the integrated control device. Provided in the rotation control device, in the integrated control device, preset the threshold value of the electric current value of the electric motor for determining the state in which the molded product is difficult to cut due to the increase in viscosity with the temperature rise of the molded product, When the measured current value of the electric motor measured by the blade rotation control device is equal to or higher than the threshold value, a high-speed rotation instruction is issued to the blade rotation control device to cut the molded product, thereby overheating the electric motor. A method for cutting a molded article in an extrusion molding machine, which is characterized by preventing a load. 3. The method for cutting a molded product in an extrusion molding machine according to claim 1, further comprising a shield plate on the downstream side of the nozzle, which is in contact with the molded product with a predetermined gap from the nozzle. It is characterized in that the molded product that is arranged and gradually extruded from the nozzle is applied to the shielding plate to adjust the protruding length thereof, and then the molded product is cut by the breaking means to make the lengths uniform. A method for cutting a molded product in an extrusion molding machine. 4. The method for cutting a molded product in an extrusion molding machine according to claim 1, wherein the molded product extruded from the nozzle is cooled. How to cut things.