JPH0669707B2 - Method and apparatus for cleaning screw for extruder etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a method and apparatus for cleaning a screw for an extruder or the like.

B. Conventional Technology As an apparatus of this type, there is one described in Japanese Utility Model Publication No. 63-16495. That is, a plurality of sets of receiving rollers are spaced in the screw axial direction so as to rotatably receive the screw in a horizontal state, and the screw is rotated by a frictional force with the receiving roller that is rotated by power, A rail is provided in a position parallel to the axial direction of the screw and apart therefrom, and a moving table is mounted on the rail by being driven by a platform reciprocating means, and a water jet unit is mounted on the moving table. Part of the nozzle was opposed to the screw.

C. Problems to be Solved by the Invention However, since the screws are set one by one and the cleaning work is performed, a great deal of time and labor is required for the worker.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a screw cleaning method and device in which a plurality of screws can be automatically cleaned by setting them once.

D. Means for Solving the Problems In order to solve the above problems, the method of the first configuration of the present invention is
The nozzles are placed so as to lie horizontally on the receiving rollers of the screws which are parallel to each other so as to lie substantially in the same horizontal plane, and to face the upper screw surface of the first screw from the ends of the parallel screws. While facing each other, the nozzle is moved from one end to the other end in the axial direction of the screw while rotating the nozzle around an axis eccentric from the nozzle hole, and then the screw is rotated by a certain angle, and then the nozzle is The screw is moved from the other end to the one end in the axial direction, then the screw is rotated by a certain angle, and the same cycle is repeated until the screw is rotated by at least 360 degrees, and then, The nozzle is moved above one end of the second screw, and is reciprocated in the axial direction of the second screw while rotating the nozzle in the same manner as described above. In addition, the screw is intermittently rotated by a fixed angle, and the same operation is performed for the third screw and thereafter.

In the device of the second configuration, a plurality of sets of receiving rollers are arranged in the screw axial direction so as to rotatably receive the screw in a horizontal state on the bottom of the box-shaped main body, and the power rotating means of the screw. Is provided, and a rail is provided at a position parallel to the axial direction of the screw and apart from it,
A screw for an extruder or the like, in which a moving table is mounted on the rail by being driven by a table reciprocating means, a water jet section is mounted on the moving table, and a nozzle of the water jet section is opposed to the screw. In the cleaning device, the plurality of sets of receiving rollers, which are spaced in the axial direction and the radial direction of the screw, are directly attached to the moving base so as to rotatably receive the plurality of parallel screws in a horizontally laid state. Alternatively, a guide rail that is indirectly provided so as to be orthogonal to the screw in a crosswise manner, a nozzle base slidably mounted on the guide rail, and the tip of the nozzle is all of the screw. A nozzle base reciprocating means for reciprocating the nozzle base along the guide rail so as to face the nozzle base, and a nozzle at the lower end rotatably attached to the nozzle base. So that the pipe faces the screw, the conduit main body hangs vertically, and the nozzle having a nozzle hole eccentric to the conduit main body, and the nozzle so as to rotate the conduit main body of the nozzle around its axis. And a nozzle rotating part provided on the table.

In the apparatus of the third configuration, a plurality of sets of receiving rollers are spaced in the screw axial direction so as to rotatably receive the screw in a horizontal state on the bottom of the box-shaped main body, and the power rotating means of the screw. Is provided, and a rail is provided at a position parallel to the axial direction of the screw and apart from it,
A screw for an extruder or the like, in which a moving table is mounted on the rail by being driven by a table reciprocating means, a water jet section is mounted on the moving table, and a nozzle of the water jet section is opposed to the screw. In the cleaning device of, in order to rotatably receive a plurality of mutually parallel screws in a horizontally laid state, a plurality of sets of receiving rollers spaced in the screw axial direction and the radial direction, and the moving base, A nozzle base mounted rotatably around a horizontal axis parallel to the axis of the screw and connected between the nozzle base protruding above the screw and the movable base, and the tip of the nozzle is connected to the nozzle base. Swinging means for changing the angle formed by the two bases so as to face all of the screws, and rotatably attached to the nozzle base, and the tip at the lower end is the screw. And a nozzle having a nozzle body vertically declining so that the nozzle body is eccentric with respect to the conduit body, and the nozzle base is provided to rotate the conduit body of the nozzle around its axis. And the nozzle rotating part is provided.

E. Action Multiple screws are lying horizontally on the receiving roller. When the nozzle rotation motor is started while the nozzle hole is directed to the first one from the lined end of the screw, the conduit body of the nozzle rotates, and the nozzle hole rotates around an eccentric axis to draw an arc. In this state, the platform moving means operates, and the platform moves from one end to the other end in the axial direction of the screw.

When the moving table reaches the vicinity of the other end of the screw S, the moving table stops. Next, the rotating means of the screw is activated, and the screw is rotated around its axis by a certain angle so that the end cleaning portion is on the upper side.

Then, the movable table moves in the opposite direction, and the nozzle moves from the other end of the screw to the one end. The movable table stops at one end.

Similarly, the above cycle is repeated until the screw is rotated 360 degrees.

When the cleaning of the first screw is completed, the nozzle base reciprocating means is then actuated, and the nozzle reciprocating means is stopped when the nozzle is positioned directly above the second screw. Then, the same operation as described above is performed and the cleaning of the second screw is completed. The third screw and thereafter are similarly operated and washed.

F. Example Hereinafter, an embodiment of the present invention will be described based on an example shown in the drawings.

As shown in FIGS. 1 and 2, the four sets of receiving rollers 2 are axially and radially oriented so that the bottom of the rectangular parallelepiped main body 1 receives the screw S rotatably in a horizontal state. Are separated by. The receiving roller 2 is screw S
Height can be adjusted according to the thickness of.

One end of the screw S is provided with a drive shaft 4 through a connecting tool 3 including a cap piece 3a and a fixing bolt 3b penetrating the cap piece 3a.
And the drive motor 6 intermittently rotates through a transmission gear 5 at a constant angle. The inner diameter of the cap piece 3a into which the screw S is fitted is larger than that of the boss portion of the screw S, and the stop bolt 3b is recessed in the key groove of the boss portion. As a result, even if the screw S and the cap piece 3a are slightly deviated from each other, the screw S can be rotated without any trouble.

A rail 7 is provided outside the box-shaped main body 1 at a position parallel to the axial direction of the screw S and separated from it in the horizontal direction at a right angle thereto, and a moving table 8 is mounted on the rail by being driven by a table moving means 9. It That is, the nut member 9a is fixed to the lower surface of the moving table 8, and the screw rod 9b screwed to the nut member 9a is rotated by the moving motor 9c.

A water jet unit is mounted on the movable table 8, and a nozzle 14 of the water jet unit faces the screw S. A nozzle tilt motor 10 is mounted on the moving table 8, and a nozzle table supporting shaft, which is an output shaft thereof, is normally and reversely rotated within a range of about 90 degrees by a power source, and horizontally projects to the screw side. And
The leg 21b of the intermediate base 21 is fixed to the output shaft of the nozzle tilt motor 10, and the intermediate base body 21a extends horizontally above the screw from the upper ends of the legs 21b.

A guide rail 22 is provided on the intermediate base 21 so as to be orthogonal to the screw in a straight line, and a nozzle base 13 is slidably mounted on the guide rail via a bearing 23.

A fluid piston cylinder mechanism, which is a nozzle base reciprocating means 24 for reciprocating the nozzle base 13 along the guide rail 22, is installed on the intermediate base 21 so that the nozzle tip faces all of the screws.

The nozzle base 13 is provided with the nozzles 14 and the nozzle rotating unit 16. That is, the nozzle 14 is rotatably attached to the nozzle base 13, and the conduit body 14a vertically hangs so that the tip 14b at the lower end faces the screw. The nozzle hole is eccentric with respect to the conduit body 14a. A flange 14c fixed to the conduit body 14a is rotatably supported around a vertical axis by a thrust bearing which is a nozzle bearing 15.

A nozzle rotating unit 16 is provided on the nozzle base 13 so as to rotate the conduit body 14a of the nozzle about its axis, and includes a nozzle rotation motor 16a and a transmission gear 16b.

The operation state will be described above.

1 and 2, the two screws S are in a state of lying horizontally on the receiving roller 2. Then, when the nozzle rotation motor 16a is started with the nozzle hole facing the first screw while being inclined to one side of the screw axis direction, the conduit body 14a rotates, and the nozzle hole rotates around an eccentric axis line. Draw an arc. When the platform moving means 9 operates in this state and the movement motor 9c is activated, the screw rod 9b rotates, and accordingly the movable table 8 moves from one end to the other end in the axial direction of the screw via the nut member 9a. To do.

When the movable table 8 reaches the right end position near the other end of the screw S, a limit switch (not shown) is activated to stop the movable table 8. Then, the signal causes the nozzle tilt motor 10 to start, the motor reverses about 45 degrees, which causes the nozzle base 13 to oscillate, and the nozzle 14 is tilted and directed to the other side in the opposite screw axis direction. change.

Then, the moving motor 9c rotates in the reverse direction, the moving table 8 moves in the opposite direction, and the nozzle moves from the other end of the screw to the one end.
At the left limit position, the movable table 8 is stopped by the operation of the limit switch (not shown). The drive motor 6 is activated by the signal, and the screw S is rotated around its axis through the transmission gear 5 by a certain angle (for example, 60 degrees) so that the end cleaning portion is on the upper side.
Accordingly, the receiving roller 2 is brought into contact with each other by friction and freely rotates.

Similarly, the above cycle is repeated until the screw is rotated 360 degrees. The above operation is automatically controlled by the sequence circuit.

As a result, the nozzle hole of the nozzle tip 14b opposes the screw surface of the screw in the optimum state, so that the water jet collides with the screw surface of the screw at the most efficient angle. Therefore, the foreign matter attached to the screw surface of the screw can be effectively removed.

When the cleaning of the first screw is completed, the nozzle base reciprocating means 24 is actuated next, and the nozzle base 13 advances forward on the intermediate base 21 via the guide rail 22 and the bearing 23, and the nozzle
When 14 is positioned directly above the other second screw, the limit switch (not shown) is activated and the nozzle reciprocating means 24 is stopped. Then, the same operation as described above is performed and the cleaning of the second screw is completed.

The set bolt 3b of the connection tool 3 is loosened, and the screw S is pulled out from the connection cap piece 3a. This completes the cleaning work.

Here, since there is only one nozzle hole in the nozzle tip, the amount of water is small, and thus the pump capacity can be reduced.

FIG. 4 shows another embodiment. A nozzle base 31 is attached to the movable base 8 so as to be rotatable around a horizontal axis parallel to the screw axis, and projects above the screw. That is, two arms 8a horizontally project above the screw from the moving table 8 and two legs 32 of the nozzle table 31 are rotatably connected to the tips thereof by the pins 8a. This pin 8a
It is located near the cover of the box body 1 above the middle of the two screws, parallel to the screw axis. A fluid piston cylinder mechanism, which is a swinging means 33, is connected between the nozzle base 31 and the movable base arm 8a, and the angle between the two bases is changed so that the nozzle chip faces all of the screws. .

The operating state of the embodiment shown in FIG. 4 will be described. When the nozzle is turned from one of the two screws to the other, in this example, the swinging means 33 is operated to change the axial direction of the nozzle 14 with respect to the screw S.
As a result, if the vicinity of the swing center of the nozzle base 31 is opened and the remaining portion is covered with the cover 1a, the jet water is suppressed to be scattered to the minimum.

Depending on the inclination angle of the screw thread surface, it may not be necessary to change the direction of the nozzle. In this case, the screw is intermittently rotated every time the nozzle moves forward or backward in the screw axial direction.

FIG. 5 shows another embodiment of the screw drive unit. That is,
A pinion 42 is attached to the drive shaft 4 via a one-way clutch 41, and a rack 43 meshing with the pinion 42 is reciprocated by an air / piston cylinder mechanism 44. A stroke adjusting bolt 46 for contacting the tip of the rack 43 and adjusting the stroke thereof is screwed into the column 45. Each of the above parts is installed on a stand 47. Then, when the rack 43 moves forward (the piston rod of the air / piston cylinder mechanism 44 advances in the direction of coming out of the cylinder), the pinion 42 and the drive shaft 4 rotate integrally,
When the rack 43 retracts, the pinion 42 idles. The forward end position of the rack 43 is adjusted by the length of the adjustment bolt 46 screwed into the post 45. Such adjustment of the stroke of the rack 43 is possible by the compressibility of air of the air-piston cylinder mechanism. By the screw driving means, even a large and heavy screw (for example, a diameter of 300 mm and a length of 10 m) can be reliably intermittently rotated with a simple structure.

The receiving roller may be rotated by power to rotate the screw.

In addition to extrusion, the present invention also applies to screws for injection molding, kneading and other applications.

The invention is not limited to the examples and embodiments described above, but includes various modifications without departing from the spirit and scope of the claims.

G. Effect of the Invention According to the first configuration of the present invention, it is possible to automatically wash by setting a plurality of screws once. Moreover, since the screw is rotated intermittently, the running cost is reduced.

With the second configuration, in addition to the effects of the first configuration, the structure is simple,
It can be provided at low cost.

According to the third configuration, in addition to the effect of the second configuration, if the vicinity of the swing center of the nozzle base is opened and the remaining upper surface of the box-shaped main body is covered with the cover, the splash of jet water can be suppressed to a minimum.

[Brief description of drawings]

1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a left side view of FIG. 2, and FIG. 4 is an enlarged side view of another embodiment. FIG. 5 is a plan view of still another embodiment. S ... Screw, 1 ... Box-shaped body, 2 ... Receiving roller, 3 ... Connector, 3a ... Cap piece, 3b ... Set bolt 4 ... Drive shaft, 5 ... Transmission gear, 6 ... Drive motor, 7
...... Rail, 8 ...... Movement base, 8a ...... Arm, 9 ...... Movement means 9a ...... Nut member, 9b ...... Screw rod, 9c ...... Movement motor, 10 ...... Nozzle tilt motor, 13 ...... Nozzle Base, 13a …… Main body, 13b …… Leg 14 …… Nozzle, 14a …… Conduit body, 14b …… Chip, 15 …… Nozzle bearing, 16 …… Nozzle rotating part, 16a …… Nozzle rotating motor, 16b …… Transmission gear 21 …… Intermediate base 21a …… Main body, 21b …… Leg, 21c …… Bracket 22 …… Guide rail, 23 …… Bearing, 24 …… Nozzle base reciprocating means, 31 …… Nozzle base, 32 …… Leg , 33 …… Swing means 41 …… One-way clutch, 42 …… Pinion, 43 …… Rack, 44 …… Air / piston cylinder mechanism, 45 …… Pillar, 46 …… Stroke adjusting bolt 47 …… Stand

Front page continued (72) Inventor Hiroshi Kasahara 2-4-1 Terauchi, Toyonaka City, Osaka Prefecture Hitachi Shipbuilding Industry Co., Ltd. (72) Hirokazu Onishi 2-4-1-1, Terauchi, Toyonaka City, Osaka Prefecture Hitachi Shipbuilding Sangyo Co., Ltd. (72) Inventor Miaki Hashimoto 2-5-8 Shimodera, Naniwa-ku, Osaka, Osaka Sanai Engineering Co., Ltd. (56) Bibliography Sho 63-16495 (JP, Y2)

Claims (3)

[Claims] 1. A plurality of mutually parallel screws are laid horizontally on a receiving roller so as to lie in substantially the same horizontal plane, and face the upper screw surface of the first screw from the ends of the parallel screws. While holding the nozzles facing each other, rotating the nozzles from one end to the other end in the axial direction of the screw while rotating the nozzles around an axis eccentric from the nozzle hole, and then rotating the screw by a certain angle. To move the nozzle from the other end to one end in the axial direction of the screw, then rotate the screw by a certain angle, and the like, until the screw is rotated at least 360 degrees, the cycle described above. Then, the nozzle is moved above one end of the second screw, and while rotating the nozzle in the same manner as described above, the nozzle is moved in the axial direction of the second screw. A method for cleaning a screw for an extruder or the like, characterized in that the screw is reciprocally moved, the screw is intermittently rotated by a predetermined angle, and then the third screw and the like are similarly operated. 2. A plurality of sets of receiving rollers are provided on the bottom of the box-shaped body so as to rotatably receive the screw in a horizontal state, and a power rotating means for the screw is provided. A rail is provided at a position parallel to the axial direction of the screw and apart from the screw, and a movable table is mounted on the rail by being driven by a platform reciprocating means, and a water jet unit is mounted on the movable platform. In a screw cleaning device for an extruder, etc., in which a nozzle of a water jet unit is opposed to the screw, a plurality of parallel screws are rotatably received in a horizontal state, in the screw axial direction and A plurality of sets of receiving rollers spaced apart in the radial direction, and directly or indirectly provided on the moving table, and provided so as to be orthogonal to the screw in a straight line. Guide rail, a nozzle base slidably mounted on the guide rail, and the nozzle base is reciprocated along the guide rail so that the tip of the nozzle faces all of the screws. A nozzle base reciprocating means for moving, and a nozzle rotatably attached to the nozzle base, in which the conduit body vertically hangs so that the tip at the lower end faces the screw, and the nozzle hole is eccentric with respect to the conduit body. And a nozzle rotating portion provided on the nozzle base so as to rotate the conduit main body of the nozzle around its axis, a cleaning device for a screw for an extruder or the like. 3. A plurality of sets of receiving rollers are provided on the bottom of the box-shaped main body in the axial direction of the screw so as to rotatably receive the screw in a horizontal state, and a power rotating means for the screw is provided. A rail is provided at a position parallel to the axial direction of the screw and apart from the screw, and a movable table is mounted on the rail by being driven by a platform reciprocating means, and a water jet unit is mounted on the movable platform. In a screw cleaning device for an extruder, etc., in which a nozzle of a water jet unit is opposed to the screw, a plurality of parallel screws are rotatably received in a horizontal state, in the screw axial direction and A plurality of sets of receiving rollers spaced in the radial direction and a movable base are attached to the movable table so as to be rotatable about a horizontal axis parallel to the axis of the screw. A nozzle base projecting above the screw and a nozzle base connected to the nozzle base and the moving base, and the angle between the two bases is changed so that the tip of the nozzle faces all of the screws. And a nozzle rotatably attached to the nozzle base, the conduit body vertically hangs so that the tip at the lower end faces the screw, and the nozzle hole is eccentric with respect to the conduit body. And a nozzle rotating portion provided on the nozzle base so as to rotate the conduit main body of the nozzle around its axis, a cleaning device for a screw for an extruder or the like.