JP3785116B2 - Purge resin material processing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a processing method for a purge resin material discharged from a screw-type kneader that melts and kneads a resin material, and a processing apparatus therefor.
[0002]
[Prior art]
In general, in a screw-type kneader that melts and kneads resin material, when the kneader starts operation, when the operation stops, when the equipment connected to the tip of the kneader is temporarily stopped, or during continuous operation, the type of resin material is different. When the change is made, the resin material in a high-temperature melt state melted and kneaded by the kneader is discharged from the kneader to the outside.
[0003]
At the start of operation, the resin material containing dust etc. in the kneader is discharged at the start of the first operation, and when the operation is restarted after the operation is stopped, the resin material and the residual resin material in the kneader are reached until a steady melt kneading state is reached. The resin material in a transient molten state is discharged. Further, when the operation is stopped, the cleaning resin material used is discharged so that the resin material does not remain in the kneader or as necessary.
[0004]
When the equipment connected to the tip of the kneader is temporarily stopped, the operation of the kneader is continued to maintain the melt-kneading state of the resin material constantly, and the resin material that is not supplied to the equipment connected to the tip is discharged. The In addition, when the type of resin material is changed, the residual resin material mixture is discharged and the resin material in a transient molten state until the changed resin material reaches a steady molten state Is discharged.
[0005]
Between the tip of the screw kneader and the equipment connected to the tip, in order to discharge the resin material to the outside of the machine, a flow path for supplying the resin material to the downstream equipment and a flow for discharging the machine to the outside A diverter valve for switching between the paths is provided. When the resin material is discharged to the outside of the machine, the diverter valve has a discharge flow path communicating with the kneading machine, and a fresh bowl-like high-temperature molten resin material is usually discharged from the discharge flow path outlet port provided downward. It is continuously discharged by the feeding action of the kneader.
[0006]
The resin material discharged from the discharge port of the diverter valve, that is, the purge resin material, is inconvenient when it is solidified while being continuously discharged, so it can be cut into small pieces that can be easily processed immediately after discharge. preferable.
[0007]
As means for cutting the continuously discharged purge resin material into small pieces, it is conceivable that an operator manually cuts the purge resin material into small pieces using a cutter or the like.
[0008]
Further, as a processing apparatus for cutting the purge resin material into small pieces, there is one disclosed in Japanese Utility Model Publication No. 7-5719. In this conventional processing apparatus, a flat plate-shaped cutter is used, and the cutter is configured to reciprocate and cross the discharge port along the outer surface provided with the discharge port of the diverter valve. In the processing apparatus configured as described above, the purge resin material discharged from the discharge port of the diverter valve is cut into a rod shape having an appropriate length or a plate shape having an appropriate thickness by the shearing action of the cutter. The purged resin material that has been cut is solidified by cooling with water or the like to form small pieces that are easy to process.
[0009]
Another example of the purge resin material processing apparatus is disclosed in JP-A-9-109225. This other conventional processing apparatus is configured to cut the purge resin material into small pieces using thin wires that repeatedly traverse the purge resin material discharge port.
[0010]
[Problems to be solved by the invention]
In recent years, the amount of purge resin material discharged has increased along with the performance and size of the kneader. On the other hand, the processing capacity of the worker is limited, and it is not efficient to manually process the purge resin material. Further, since the discharged purge resin material is usually at a high temperature of 200 ° C. or higher and has a high viscosity and is difficult to cut, it is not preferable in terms of safety to manually process such a purge resin material.
[0011]
Further, in the processing apparatus disclosed in Japanese Utility Model Publication No. 7-5719, when the flat cutter crosses back and forth along the discharge port, the contact area between the cutter and the purge resin material is large, and the contact surface Due to the large frictional force or the shearing force of the purge resin material, a large driving force is required to reciprocate the cutter. When the purge resin material adheres to the contact surface, a larger driving force is required. In addition, the flat cutter is in a state where the discharge port is partially or entirely blocked when traversing along the discharge port, and receives the pressure of the purge resin material discharged continuously, and the outer surface of the cutter and the cover When a gap is generated between the two, the sharpness is deteriorated and complete cutting is not performed. In addition, the purge resin material adhering to the contact surface between the cutter and the purge resin material causes a gap between the cutter and the outer surface, resulting in poor sharpness.
[0012]
Another processing apparatus disclosed in Japanese Patent Application Laid-Open No. 9-109225 uses a thin line as a cutting means, which solves the above-described problems of the processing apparatus disclosed in Japanese Utility Model Laid-Open No. 7-5719. It is possible. However, since the thin wire is composed of a piano wire having a wire diameter of about 0.3 mm to 1.0 mm, there is a risk that it will be deteriorated and cut when repeatedly used under the high temperature environment as described above. is there.
[0013]
Accordingly, an object of the present invention is to provide a purge resin material processing apparatus that does not require a large driving force and has high reliability.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, a purge resin material processing apparatus of the present invention is a purge resin material processing apparatus that is discharged to the outside from a screw-type kneader that melts and kneads the resin material , and is discharged from a plurality of discharge ports. The opening / closing means is driven in a direction intersecting with the discharge direction of the purge resin material, and the opening / closing means has a plurality of holes for sequentially opening / closing each of the plurality of discharge ports. Each of the plurality of discharge ports while maintaining a state where at least a part of at least one of the plurality of discharge ports is opened when the opening / closing means is driven with respect to a direction in which the means is driven The opening / closing means is reciprocally moved in a direction crossing the discharge direction of the purge resin material. Rannahli, the said closing plate, wherein said plurality of holes are formed at the intervals in the direction of the reciprocating movement.
[0015]
Further, another purge resin material processing apparatus of the present invention is a purge resin material processing apparatus that is discharged to the outside from a screw kneader that melts and kneads the resin material, and the purge resin discharged from a plurality of discharge ports. Opening / closing means driven in a direction intersecting with the material discharging direction is provided, and the opening / closing means is driven by a plurality of holes for sequentially opening / closing each of the plurality of discharge ports. Each of the plurality of outlets is sequentially opened and closed while maintaining at least a part of at least one of the plurality of outlets when the opening / closing means is driven. The opening / closing means is formed in a direction crossing the discharge direction of the purge resin material at a position facing the plurality of discharge ports. It consists closing rod circumferential surface rotational movement, the said closing rod, and wherein the plurality of holes are formed at the intervals in the circumferential direction of the outer peripheral surface.
[0017]
According to the purge resin material processing apparatus of the present invention, the purge resin material discharged from the discharge port is continuously discharged through the hole while the hole opens the discharge port, and the hole is discharged from the discharge port. When it is closed, it is cut into small pieces. At this time, since a state where at least a part of at least one of the plurality of discharge ports is opened is maintained, all of the plurality of discharge ports are not blocked simultaneously. Therefore, even when the opening / closing operation of the discharge port by the opening / closing means becomes impossible due to a failure or the like, since at least a part of one of the discharge ports is open, the purge resin is removed from the open portion. Since the discharge of the material can be continued, the purge resin material is not clogged. Further, in such a configuration that does not block all of the plurality of discharge ports at the same time, there is no need to drive the opening / closing means at high speed in order to prevent the discharge of the purge resin material from being delayed, Since the pressing force applied to the opening / closing means by the pressure is relatively small, a relatively small driving force is sufficient for the opening / closing operation of the opening / closing means.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0021]
1 is a view showing a purge resin material processing apparatus according to an embodiment of the present invention, and FIG. 2 is a view of the purge resin material processing apparatus shown in FIG. 1 as viewed from the direction of arrow A in FIG.
[0022]
A diverter valve 1 mounted between an extruder and a gear pump (both not shown) includes a valve case 2, a piston 3, and a hydraulic cylinder 4.
[0023]
The valve case 2 is formed with a lumen 2a that accommodates a piston 3 that reciprocates in the vertical direction, and an inlet 2b and an outlet 2c are formed on both side walls at positions facing each other through the side wall. Each is formed. Further, a cover 2d that covers a lower portion of the valve case 2 is provided on the lower side of the valve case 2. The cover 2d has a plurality of discharge ports 2e (in this embodiment) for discharging the purge resin material downward. An example in which _two discharge ports 2e ₁ and 2e ₂ are provided) is formed.
[0024]
In the upper half of the piston 3 that moves up and down the lumen 2a of the valve case 2, a passage 3a that penetrates between the side surfaces on both sides so that the inlet 2b and outlet 2c of the valve case 2 can communicate with each other. Is provided. On the other hand, the lower half is provided with a discharge channel 3b penetrating between the inflow side surface and the lower end surface so that the inflow port 2b and the discharge port 2e can communicate with each other. The upper end of the piston 3 is connected to a hydraulic cylinder 4 that is fixedly disposed on the upper part of the valve case 2 so as to be driven in the vertical direction.
[0025]
In the diverter valve 1 configured as described above, when the hydraulic cylinder 4 is operated and the piston 3 is pushed down, the passage 3a connects the inlet 2b and the outlet 2c of the valve case 2 so that the steady operation state is established. Become. On the other hand, when the piston 3 is pulled up to the position shown in FIG. 1, the discharge passage 3b communicates the inlet 2b and the outlet 2e, and the outlet 2c is blocked.
[0026]
In the vicinity of the lower end portion of the diverter valve 1, a processing device 5 having an opening / closing plate 6, a frame body 7, and an air cylinder 8 is disposed.
[0027]
The frame body 7 has at least a U-shape as shown in FIG. 2, and holds the processing device 5 in the vicinity of the lower end portion of the diverter valve 1 at the opposing parallel portion, and the opening / closing plate 6 on the lower surface of the cover 2d. The air cylinder 8 is held at an intermediate portion while being reciprocally held in contact or with a slight gap. The opening / closing plate 6 is made of a flat plate-like member, and opens one discharge port 2e when the opening / closing plate 6 is completely pushed out, and opens the other discharge port 2e when the opening / closing plate 6 is fully drawn. As shown, two holes 6a are formed. The rear end of the opening / closing plate 6 is connected to the air cylinder 8. The air cylinder 8 is configured to repeat the protruding operation and the retracting operation of the opening / closing plate 6 at a constant period.
[0028]
FIG. 2 shows a state in which the air cylinder 8 is completely retracted. In this state, the lower hole 6a ₁ is located at a position where the lower discharge port 2e ₁ is completely opened. . Gradually extruded air cylinder 8 from this state, when we move the closing plate 6 in the figure B ₁ direction, while the opening area of the outlet 2e ₁ by holes 6a ₁ of the illustrated lower side gradually decreases, illustrated the opening area of the discharge port 2e ₂ by the upper hole 6a ₂ gradually increases. Then, in the state where the air cylinder 8 is completely pushed out, the upper hole 6a ₂ shown in the figure is located at a position where the upper discharge port 2e ₂ shown in the figure is completely opened, contrary to the state shown in FIG. In this way, the processing device 5 can switch the open / close state of the discharge ports 2e ₁ and 2e ₂ by reciprocating the open / close plate 6 in the B ₁ direction and B ₂ direction shown in the figure by the air cylinder 8. And while the opening / closing plate 6 is reciprocating, at least a part of the discharge ports 2e ₁ and 2e ₂ is open.
[0029]
In this way, the opening / closing plate 6 has a plurality of holes 6a ₁ , 6a that are connected to the two discharge ports 2e ₁ , 2e ₁ when the opening / closing plate 6 is moved in the directions B ₁ , B _{2 in which} the opening / closing plate 6 is moved. 2e ₂ is formed at an interval that allows each of the _two outlets 2e ₁ and 2e ₂ to be opened and closed while maintaining a state where at least a part of at least one outlet of 2e ₂ is opened. Yes.
[0030]
Next, the processing operation of the purge resin material by the processing apparatus 5 configured as described above will be described.
[0031]
When the extruder (not shown) is operated while the piston 3 of the diverter valve 1 is pulled up as shown in FIG. 1, the molten waste resin discharged from the screw tip of the extruder, that is, the purge resin material is From the inlet 2b of the diverter valve 1, it is discharged from the outlet 2e through the discharge passage 3b of the piston 3.
[0032]
To purge the resin material to be discharged, to operate the processing device 5 extruded from the state of FIG. 2 the air cylinder 8 in the B ₁ direction strike, closing plate 6 moves forward, as shown in FIG. 3 (a), While the hole 6a ₁ cuts the purge resin material continuously discharged from the discharge port 2e ₁ , the hole 6a ₂ opens the discharge port 2e _{2 so} that the purge resin material is discharged from the discharge port 2e _2. become. In the process in which the opening / closing plate 6 moves forward in this way, the hole 6a ₁ gradually closes the discharge port 2e ₁ whereas the hole 6a ₂ gradually opens the discharge port 2e _2. At least a part of 2e ₁ and 2e ₂ is always open.
[0033]
Subsequently, when the air cylinder 8 is pulled in the B ₂ direction, the opening / closing plate 6 moves backward, and as shown in FIG. 3B, the purge resin material in which the hole 6a ₂ is continuously discharged from the discharge port 2e _1. while cutting a hole 6a ₁ is opened an outlet 2e _1, purging the resin material is to be discharged from the discharge port 2e _1. Also at this time, at least a part of the discharge ports 2e ₁ and 2e ₂ is always open.
[0034]
In this manner, according to the processing device 5 of this embodiment, the two purge resin material discharged from the discharge port 2e _1, 2e _2, without blocking any two outlets 2e _1, 2e ₂ simultaneously cutting can do. For this reason, even if the processing device 5 breaks down and the operation of the opening / closing plate 6 stops, the purge resin material can be continuously discharged from the opening of the discharge ports 2e ₁ and 2e ₂ . The diverter valve 1 and the extruder (not shown) are not clogged with the purge resin material.
[0035]
In the case of a configuration in which all of the discharge ports 2e ₁ and 2e ₂ are blocked at the same time, in order to prevent the discharge of the purge resin material from stagnation, the time for blocking simultaneously must be made as short as possible. For this purpose, it is necessary to quickly open and close the opening / closing plate 6. When all of the discharge ports 2e ₁ and 2e ₂ are simultaneously closed, a relatively large pressing force is applied to the opening / closing plate 6 by the pressure of the purge resin material. In this case, a relatively large driving force is required to open and close the opening / closing plate 6. On the other hand, in the configuration in which all of the discharge ports 2e ₁ and 2e ₂ are not simultaneously closed as in the present embodiment, it is necessary to operate the opening / closing means at a high speed in order to prevent the purge resin material from being discharged slowly. In addition, since the pressing force of the opening / closing plate 6 due to the pressure of the purge resin material is small, the opening / closing of the opening / closing plate 6 is sufficient with a relatively small driving force.
[0036]
Note that the opening / closing plate 6 used in this embodiment has no cutter blade formed on the inner peripheral surfaces of the holes 6a ₁ and 6a ₂ . Therefore, the purge resin material is cut by a shearing force generated between the edges of the holes 6a ₁ and 6a _{2 and} the edges of the discharge ports 2e ₁ and 2e ₂ .
[0037]
When the cutter blade is formed on the inner peripheral surface of the holes 6a ₁ and 6a ₂ , the purge resin material can be cut well when the purge resin material is not attached to the cutter blade, but the purge resin material is attached. If you do, the sharpness of the cutter blade will get worse. Therefore, it is necessary to clean the cutter blade by stopping the operation of the processing device 5 every time the purge resin material adheres. On the other hand, in the configuration of the present embodiment, even if some purge resin material adheres to the edges of the holes 6a ₁ and 6a ₂ , the cutting state is not so much affected. It can be done for a long time.
[0038]
(Other embodiments)
FIG. 4 is a view showing another embodiment of the purge resin material processing apparatus according to the present invention, wherein FIG. 4 (a) is a front view thereof, and FIG. 4 (b) is an XX line in FIG. 4 (a). FIG. 3C is a perspective view showing the open / close bar shown in FIG. 1A in a partially broken state.
[0039]
Since the configuration of the diverter valve, the valve case, and the piston in the present embodiment is the same as that shown in FIG. 1 except for the configuration of the cover 12d, description thereof will be omitted, and the following is shown in FIG. A configuration different from the above will be described.
[0040]
As shown in FIG. 4, in this embodiment, four discharge ports 12e ₁ , 12e ₂ , 12e ₃ and 12e ₄ are formed in the cover 12d. The purge resin material processing apparatus 15 of this embodiment includes an opening / closing bar 16 having holes 16a ₁ , 16a ₂ , 16a ₃ , 16a ₄ corresponding to the respective discharge ports, below the cover 12d. . A motor 20 is connected to the open / close bar 16, and when the motor 20 is operated, the open / close bar 16 rotates at a relatively slow constant rotational speed around its center axis. As described above, the outer peripheral surface of the open / close bar 16 rotates in a direction intersecting the discharge direction of the purge resin material at a position facing the discharge ports 12e ₁ , 12e ₂ , 12e ₃ , 12e ₄ . .
[0041]
The holes 16a ₁ , 16a ₂ , 16a ₃ and 16a ₄ of the opening / closing bar 16 are formed so as to be sequentially shifted by about 45 ° in the circumferential direction of the opening / closing bar 16. Therefore, even if the opening / closing bar 16 stops rotating in any state, at least a part of any one of the holes communicates with any one of the discharge ports. As described above, the opening / closing bar 16 has a plurality of holes 16a ₁ , 16a ₂ , 16a ₃ , 16a ₄ , with respect to the rotational movement direction of the opening / closing bar 16, that is, the circumferential direction of the outer peripheral surface of the opening / closing bar 16. while maintaining a state of being opened at least a portion of the at least one outlet of the discharge port _{12e 1, 12e 2, 12e 3} , 12e 4 when rotated, outlet 12e _1, 12e _2, 12e ₃ , 12e ₄ are formed at an interval that allows opening and closing each of them.
[0042]
Next, the purge resin material processing operation by the processing apparatus 15 configured as described above will be described.
[0043]
FIG. 4 (a), the discharge port 12e ₁ in the state shown in _{(b), 12e 2, 12e} 3, when starting the discharge of purge resin material from 12e _4, outlet 12e ₁ of these outlets in that state since only the hole 16a ₁ is only in communication, purging the resin material is discharged through the holes 16a ₁ from the discharge port 12e _1.
[0044]
Thereafter, when the opening / closing rod 16 is rotated in the direction indicated by the arrow Y by the motor 20, the opening area of the discharge port 12e ₁ by the hole 16a ₁ gradually becomes narrower, and the edge of the hole 16a _{1 and} the edge of the discharge port 12e ₁ In the meantime, the purge resin material in the hole 16a ₁ is gradually cut, while the adjacent hole 16a ₂ gradually opens the discharge port 12e ₂ . Then, the purge resin material is discharged from the discharge port 12e ₂ through the hole 16a ₂ this time. Therefore, when the purge resin material is discharged from the discharge port 12e ₁ and the hole 16a ₁ to the discharge port 12e ₂ and the hole 16a ₂ , both the holes 16a ₁ and 16a ₂ are not blocked.
[0045]
The operation of discharging and cutting the purge resin material is performed in this manner in the discharge port 12e ₁ and the hole 16a ₁ , the discharge port 12e ₂ and the hole 16a ₂ , the discharge port 12e ₃ and the hole 16a ₃ , and the discharge port 12e ₄ and the hole. 16a ₄ , and the discharge port 12e ₁ and the hole 16a ₁ are performed again in this order.
[0046]
Thus, according to the processing apparatus 15 of this embodiment, the purge resin material discharged from the _four discharge ports 12e ₁ , 12e ₂ , 12e ₃ , 12e ₄ can be blocked without blocking all four discharge ports at the same time. Can be cut. Therefore, even if the processing device 15 breaks down and the operation of the open / close bar 16 stops, the purge resin material is discharged from the opening of the discharge ports 12e ₁ , 12e ₂ , 12e ₃ , 12e _4. The diverter valve or extruder is not clogged with purge resin material because it can continue.
[0047]
Since it is necessary for a predetermined amount of purge resin material to pass through the holes 16a ₁ , 16a ₂ , 16a ₃ , 16a ₄ , it is not preferable to rotate the opening / closing bar 16 at a very high speed. Therefore, the rotation speed of the opening / closing bar 16 is determined according to the viscosity (fluidity) of the purge resin material. However, since the normal purge resin material does not have a high fluidity, the rotation speed of the opening / closing bar 16 is set to a relatively low speed, so that the motor 20 does not require a large driving force.
[0048]
【The invention's effect】
As described above, according to the present invention, the purge resin material is discharged from the plurality of discharge ports, and a plurality of discharges are maintained while maintaining at least a part of at least one of the plurality of discharge ports. Since each of the outlets is sequentially opened and closed, all of the plurality of outlets are not blocked at the same time, and the following effects can be obtained.
(1) Even when the opening / closing operation of the discharge port becomes impossible due to a failure or the like, since at least a part of any of the discharge ports is open, the purge resin material is removed from the open portion. Since the discharge can be continued, the purge resin material is not clogged, and the reliability of the purge resin material processing method and apparatus can be improved.
(2) It is not necessary to perform the opening / closing operation at high speed to prevent the discharge of the purge resin material from being delayed, and the pressing force applied by the pressure of the purge resin material is relatively small. The driving force applied can be made relatively small.
[Brief description of the drawings]
FIG. 1 shows a purge resin material processing apparatus according to an embodiment of the present invention.
2 is a view of the purge resin material processing apparatus shown in FIG. 1 as viewed from the direction of arrow A in FIG. 1;
FIG. 3 is a diagram showing a state when the opening / closing plate is pushed out (a) and when it is pulled in (b).
FIG. 4 is a view showing another embodiment of the purge resin material processing apparatus according to the present invention.
[Explanation of symbols]
1 diverter valve 2 valve case 2a lumen 2b inlet 2c outlet 2d, 12d covers _{2e, 2e 1, 2e 2,} 12e 1, 12e 2, 12e 3, 12e 4 outlet 3 piston 3a passage channel 3b discharge channel 5, 15 Processing device 6 Opening and closing plate 6a ₁ , 6a ₂ , 16a ₁ , 16a ₂ , 16a ₃ , 16a ₄ hole 7 Frame 8 Air cylinder 16 Opening / closing rod 20 Motor

Claims (2)

In the processing apparatus of the purge resin material discharged to the outside from the screw type kneader for melting and kneading the resin material,
Opening / closing means (6) driven in a direction intersecting with the discharge direction of the purge resin material discharged from a plurality of discharge ports (2e ₁ , 2e ₂ ) is provided. A plurality of holes (6a ₁ , 6a ₂ ) for sequentially opening and closing each of the outlets of the plurality of outlets when the opening / closing means is driven with respect to the direction in which the opening / closing means is driven. It is formed at an interval that allows each of the plurality of discharge ports to be opened and closed sequentially while maintaining a state in which at least a part of at least one discharge port is opened .
The opening / closing means includes an opening / closing plate (6) reciprocally moved in a direction intersecting with the discharge direction of the purge resin material, and the plurality of holes (6a ₁ , 6a ₂ ) are formed in the opening / closing plate. A purge resin material processing apparatus, characterized in that the purge resin material is formed at an interval in the reciprocating direction . In the processing apparatus of the purge resin material discharged to the outside from the screw type kneader for melting and kneading the resin material,
Opening / closing means (16) driven in a direction intersecting with the discharge direction of the purge resin material discharged from a plurality of discharge ports (12e ₁ , 12e ₂ , 12e ₃ , 12e ₄ ) is provided. The means includes a plurality of holes (16a ₁ , 16a ₂ , 16a ₃ , 16a ₄ ) for sequentially opening and closing each of the plurality of discharge ports, for driving the opening / closing means with respect to a direction in which the opening / closing means is driven. An interval that allows each of the plurality of discharge ports to be sequentially opened and closed while maintaining a state in which at least a part of at least one of the plurality of discharge ports is opened. Formed,
The opening / closing means has an opening / closing bar whose outer peripheral surface rotates in a direction intersecting the discharge direction of the purge resin material at a position facing the plurality of discharge ports (12e ₁ , 12e ₂ , 12e ₃ , 12e ₄ ). made 16, the said closing rod, characterized in that prior Symbol plurality of holes _{(16a 1, 16a 2, 16a} 3, 16a 4) are formed at the intervals in the circumferential direction of the outer peripheral surface processor purge resin material and.

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