JP4995943B2 - Fitting tool for kneading ball and method for fitting kneading ball in extruder for extrusion molding machine using the same - Google Patents

Description

The present invention relates to a kneading ball fitting used for fitting a kneading ball into an annular groove of a kneading shaft constituting an extruder for an extrusion molding machine, and the kneading ball. The present invention relates to a method for fitting a kneading ball into an annular groove of a kneading shaft that constitutes an extruder for an extrusion molding machine using a fitting tool.

Conventionally, as an extruder for an extrusion molding machine used at the time of production of resin pellets or the like, the one described in Japanese Patent Application Laid-Open No. 2001-287222 previously proposed by the present inventor is known,
This will be described with reference to FIGS.

That is, in the figure, 11 is an extruder for an extrusion molding machine that is horizontally disposed on an elongated rectangular frame 12, and 13, 32, and 14 are required lengths and diameters constituting the extruder 11. The front cylinder with a detachable band heater (not shown), the middle cylinder, and the rear cylinder, 15 and 16 are removably inserted into the front middle and rear cylinders 13, 32, and 14. An extrusion screw shaft and a kneading shaft are provided, and the kneading shaft 16 is integrally interposed in the middle of the screw shaft 15. Reference numeral 17 denotes a meandering annular groove formed on the outer peripheral surface of the kneading shaft 16, and 18 denotes a guide groove formed on the inner peripheral surface of the middle cylinder 32 corresponding to the annular groove 17.
A kneading ball 9 is freely fitted between the guide groove 18 and the annular groove 17, and a flow path 20 is formed in the crest portion 21 of the kneading shaft 16 at a predetermined interval.
Reference numeral 22 denotes a hopper connected to the rear cylinder 14 through the insertion port 23 in a communicating manner.
Reference numeral 4 denotes a nozzle die attached to the front end of the front cylinder 13.
In addition, 25 is a cooling water tank movably disposed in front of the extruder 11 via a gantry, and 26 is a resin pelletizer disposed in front of the water tank 25 via a gantry.

  Reference numeral 27 denotes a kneading ball fitting. The fitting 27 is fitted to the kneading shaft 16 and has a substantially cylindrical fitting body 28 having a required length and diameter, and the kneading shaft 16. In order to correspond to the annular groove 17, a kneading ball fitting hole 29 of a required strip formed in a long hole shape along the axial direction of the fitting body 28, and the fitting holes 29 from the outside. It is composed of a long plate-shaped closing member 30 that can be fixed by a set screw 31 while being applied.

The extruder 11 configured as described above rotates the kneading shaft 16 together with the screw shaft 15 in a predetermined direction while heating the front, middle and rear cylinders 13, 32, and 14 to a predetermined temperature. 22, the processing resin material is put into the rear cylinder 14,
While being heated and melted, the mixture is pumped in the kneading shaft 16 direction. Next, the molten resin is dispersed and kneaded while colliding with a high pressure on a kneading ball 19 that floats along the annular groove 17. After that, while being pumped by the screw shaft 15, the strands are sequentially extruded from the nozzle die 24, cooled through the cooling water tank 25, and then cut into pellets by the resin pelletizer 26. .

Further, in the case where fouling or the like is caused by the use of the extruder 11 over time, FIG. 12 and FIG.
As shown in FIGS. A and B, first, the water tank 25 is drained and moved and stored in another location, and the front cylinder 13 on the water tank 25 side is placed on a gantry (reference numeral omitted) while the middle cylinder 3
The kneading shaft 16 is removed from the middle and rear cylinders 32 and 14 together with the screw shaft 15. Then, the kneading ball 19 is taken out from the annular groove 17 and cleaned together with the screw shaft 15 and the kneading shaft 16.

When the cleaning is completed, as shown in FIGS. 14A and 14B and FIG.
The kneading ball 19 is fitted into the annular groove 17 by the fitting tool 27 while the kneading shaft 16 is inserted into the middle rear cylinders 32 and 14 together with the shaft 15.
That is, first, one end of the screw shaft 15 is inserted into the remaining middle cylinder 32, and the fitting body 28 of the fitting tool 27 is fitted from the other end (see FIG. 14A). Then, the kneading balls 19 are sequentially fitted into the respective long fitting holes 29 and fitted into the annular groove 17, and the closing member 30 is applied to the fitting hole 29 with the set screw 31. It stops in a closed state and prevents the kneading ball 19 from escaping (see FIG. 15). Thereafter, the kneading ball 19 is fitted and held in the annular groove 17 and the kneading shaft 16 is inserted into the remaining middle cylinder 32, and then the fitting body 28 is pulled out from the screw shaft 15. Then, the separately stored front cylinder 13 is fitted to the screw shaft 15 and assembled, and the separately stored water tank 25 is returned to its original position (see FIGS. 7 and 14B).

JP 2001-287222 A

By the way, there is no problem when the resin pellets are produced using the extruder 11 configured as described above, but the screw shaft 15, the kneading shaft 16, or the kneading is caused by the use over time. There is a problem in cleaning the ball 19.
That is, when the kneading ball 19 is fitted into the annular groove 17 of the kneading shaft 16 after cleaning, the substantially cylindrical fitting body 28 is externally fitted to the kneading shaft 16 from the outside as described above. It is supposed to be fitted while staking. Since the fitting body 28 is externally fitted to the kneading shaft 16 from the outside in this way, when the screw shaft 15 and the kneading shaft 16 are cleaned, FIG.
As shown in FIG. 4, the water tank 25 and the front cylinder 13 are moved and stored in advance at other locations.
It is necessary to restore the water tank 25 and the front cylinder 13 to the original state again after the completion of the fitting of the kneading ball 19, and the work is very troublesome and troublesome. It was. Further, even when the kneading ball 19 is fitted, the substantially cylindrical fitting body 28 is fitted to the annular groove 17 through the fitting hole 29 while being fitted to the kneading shaft 16 from the outer side. Since the fitting hole 29 is inserted into the middle rear cylinders 32 and 13 while closing the fitting hole 29 with the closing member 30 from the outside, the fitting work is very troublesome and time-consuming. The work efficiency was poor.

The present invention solves the conventional problems and secures a working space by moving and storing the water tank 25 and the front cylinder 13 to other locations even when the screw shaft 15 and the kneading shaft 16 are cleaned. There is no need to do this, and the kneading ball 19 can be easily and quickly and reliably fitted with high efficiency, and a kneading ball fitting, and the same are used. An object of the present invention is to provide a method for fitting a kneading ball in an extruder for an extruder.

In order to achieve the above object, the invention according to claim 1 of the present invention is characterized in that a kneading ball is inserted into an annular groove of a kneading shaft inserted in a detachable cylinder constituting an extruder for an extrusion molding machine. A kneading ball fitting for fitting a kneading ball, wherein the kneading ball fitting is divided and formed to be openable and closable along an axial direction so as to be detachably fitted to a kneading shaft. A split cylindrical fitting body, and a kneading ball for a required strip formed in a long hole shape along the axial direction of the fitting body so as to correspond to the annular groove.
Kneading, characterized in that it comprises: a fitting hole for a cable; and a plate-like check member having elasticity that protrudes inwardly from at least one side edge of each fitting hole. The gist of the ball fitting is as follows.

According to the second aspect of the present invention, a kneading shaft is inserted into a required number of cylinders that constitute an extruder for an extrusion molding machine so that adjacent cylinders are spaced apart at a predetermined interval and exposed. The kneading ball fitting according to claim 1 is detachably fitted to the kneading shaft portion to be detachably fitted, and the kneading balls are sequentially fitted into the respective fitting holes, and the check members are used to A gist of a kneading ball fitting method in an extruder for an extrusion molding machine, wherein the kneading shaft is inserted into a cylinder and fitted into the annular groove in order while preventing escape. It is.

Since the invention according to claim 1 is configured as described above, the fitting body is expanded and expanded on the kneading shaft after cleaning, and the kneading balls are sequentially fitted into the fitting holes. In addition, the check member prevents the escape of the kneading ball and inserts the kneading shaft into the cylinder so as to fit into the annular groove. It can be easily and quickly and surely fitted into the annular groove with good work efficiency.

Since the invention described in claim 2 is configured as described above, the kneading shaft is inserted into a cylinder that can be freely moved and separated, the adjacent cylinders are separated by a predetermined interval, and the kneading shaft portion that is exposed is exposed. Further, the kneading ball fitting tool according to claim 1 is detachably fitted, and the kneading balls are sequentially fitted into the fitting holes via the check members and held in a non-return state. The kneading shaft can be inserted into the cylinder and fitted and held in the annular groove. The kneading ball can be easily and quickly and reliably operated in the annular groove of the kneading shaft. It can be fitted well. Furthermore, since the cylinder is separated and the kneading ball fitting is fitted on the annular groove while the kneading ball fitting is externally fitted to the kneading shaft exposed in the meantime, As described above, it is not necessary to move and store a part of the water tank or cylinder to another place to secure a fitting work space, and as a result, the kneading ball is always easily put into the annular groove of the kneading shaft. It can be fitted with good working efficiency.

It is a side view which shows the fitting tool 1 for kneading | mixing balls of this invention. It is sectional drawing which follows the II line | wire of FIG. 3 is a side view showing a state in which a kneading shaft 16 is extracted from the extruder 11. FIG. FIG. 3 is a side view showing a state in which the kneading ball 19 is fitted into the annular groove 17 of the kneading shaft 16 by the kneading ball fitting 1 of the present invention. It is a cross-sectional view which shows the state which expands the fitting tool 1 for kneading | mixing balls of this invention, and is externally fitted to the kneading | mixing axis | shaft 16. FIG. FIG. 3 is a cross-sectional view showing a state in which a kneading ball 19 is fitted in an annular groove 17 of a kneading shaft 16 by the kneading ball fitting 1 of the present invention. It is a side view which shows the state which connected the water tank 25 and the resin pelletizer 26 to the conventional extruder 1 in order to manufacture a resin pellet. It is a partially expanded longitudinal cross-sectional view which shows the conventional extruder 11. FIG. It is an expanded vertical sectional view which shows the kneading | mixing axis | shaft 16 of the conventional extruder 11. FIG. It is a side view which shows the conventional fitting tool 27 for kneading | mixing balls. It is sectional drawing which follows the II-II line of FIG. It is a side view which shows the state which moved and stored the water tank 25 to the other location in order to extract the kneading | mixing axis | shaft 16 from the extruder 11. FIG. It is a side view which shows the state which moves the front cylinder 13 of the extruder 11, and extracts the kneading | mixing axis | shaft 16. FIG. It is a side view showing a state in which the kneading ball 19 is fitted into the annular groove 17 of the kneading shaft 16 by the conventional kneading ball fitting tool 27. FIG. 5 is an enlarged cross-sectional view showing a state in which a kneading ball 19 is fitted in an annular groove 17 of a kneading shaft 16 by a conventional kneading ball fitting tool 27.

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated based on one Example shown on drawing.
1 and 2 show an embodiment of the present invention. In the figure, reference numeral 1 denotes a kneading ball 19 fitted in an annular groove 17 of a kneading shaft 16 constituting a conventional kneading machine 11. A fitting member for a kneading ball to be squeezed, wherein the fitting 1 is divided into a cylindrical tube fitting body 2 that is divided along the axial direction so as to be detachably fitted to the kneading shaft 16 from the outside; A connecting shaft 3 for connecting the fitting body 2 so as to be openable and closable, and a kneading ball fitting for a required strip formed in a long hole shape along the axial direction of the fitting body 2 so as to correspond to the annular groove 17. A pair of plate-like non-return members 5 having elasticity, projecting inwardly from both side edges of each fitting hole 4, and a closing pin for closing the fitting body 2 6.

Next, the use state of the kneading ball fitting 1 configured as described above will be described.
First, in the case where fouling or the like occurs due to the use of the extruder 11 over time, as shown in FIGS. 3A and 3B, the front cylinder 13 is moved and separated from the middle cylinder 32 at a predetermined interval. The kneading shaft 16 together with the screw shaft 15 and the front / rear cylinder 13.
Pull out outward from 32/14. At this time, the water tank 25 can be easily extracted without being moved and stored in another place as in the conventional example. Then, the kneading ball 19 is taken out from the annular groove 17 and cleaned together with the screw shaft 15 and the kneading shaft 16.

Then, when the cleaning is completed, as shown in FIGS.
At the same time, while the kneading shaft 16 is inserted into the front, middle and rear cylinders 13, 32, and 14, the kneading ball 19 is fitted into the annular groove 17 by the fitting tool 1.
That is, first, while the front middle cylinders 13 and 32 are separated at a predetermined interval, the front cylinder 1
3, the kneading shaft 16 is inserted together with the screw shaft 15 toward the middle cylinder 32, and the kneading shaft 16 is exposed between the front middle cylinders 13 and 32.
After that, the fitting body 2 of the fitting 1 is expanded and exposed to the kneading shaft 16 exposed, and is closed with a stop pin (see FIGS. 4A and 5). Subsequently, the kneading balls 19 are fitted into the respective fitting holes 4.
The kneading shaft 16 is inserted into the middle cylinder 32 and is fitted and held in the annular groove 17 (see FIG. 6) while preventing the escape by the check member 5. At this time, the kneading shaft 16 together with the screw shaft 15 is placed on the front middle cylinders 13 and 32 separated by a predetermined interval.
The kneading ball 19 is fitted into the annular groove 17 while the fitting 1 is fitted on the kneading shaft 16 exposed between the front middle cylinders 13 and 32 that are spaced apart. Therefore, not only can the kneading ball 19 be fitted into the annular groove 17 of the kneading shaft 16 easily, quickly and surely with high work efficiency, but also the water tank 25 or the like as in the conventional example. It is not necessary to transfer the front cylinder 13 to another place to secure the space for the fitting operation. As a result, the kneading ball 19 is always easily put into the annular groove 17 of the kneading shaft 16 so that the work efficiency is improved. It can be fitted well.
When the kneading ball 19 is completely fitted, the front cylinder 13 is moved to the middle cylinder 32.
And used for use (see FIG. 4B and FIG. 7).

In the above embodiment, the kneading ball fitting 1 is applied to the kneading shaft 16 of the extruder 11 for producing resin pellets, but is not limited thereto. The present invention can also be applied to the kneading shaft of an extruder in other extrusion molding machines.
Further, a pair of plate-like check members 5 on both sides of the fitting hole 4 of the fitting body 2 from the both side edges toward the inside.
However, the present invention is not limited to this, and the fitting holes 4 may be projected at least on one side edge.

DESCRIPTION OF SYMBOLS 1 Fitting tool for kneading balls 2 Fitting body 4 Fitting hole 5 Check member 11 Extruder 13 Front cylinder 14 Rear cylinder 16 Kneading shaft 17 Annular groove 19 Kneading ball 32 Middle cylinder

Claims (2)

A kneading ball fitting for fitting a kneading ball into an annular groove of a kneading shaft inserted in a cylinder that can be freely separated from each other, which constitutes an extruder for an extrusion molding machine. The kneading ball fitting is divided into a cylindrical fitting body that is formed to be openable and closable along the axial direction so as to be detachably fitted to the kneading shaft, and the fitting to correspond to the annular groove. The required kneading ball fitting holes formed in the shape of a long hole along the axial direction of the united body, and projecting in an inclined manner from at least one side edge of each fitting hole inward. A kneading ball fitting comprising a plate-like non-return member having high elasticity. 2. The kneading shaft is inserted into a required number of cylinders constituting the extruder for an extrusion molding machine, the adjacent cylinders are separated by a predetermined interval, and the kneading shaft portion exposed is defined in claim 1. The kneading ball fittings are detachably fitted, and the kneading balls are sequentially fitted into the respective fitting holes, and the kneading shafts are prevented from escaping by the check members, and the kneading shafts are connected to the cylinders. A method of fitting a kneading ball in an extruder for an extrusion molding machine, characterized in that the kneading ball is inserted into a ring and sequentially fitted into the annular groove.

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