JPS6328609A - Inclined type continuous kneading device - Google Patents

Abstract

PURPOSE:To dissolve the trouble of difficult maintenance of a gear pump by a method wherein a mixing chamber, in which flighted screw rotors are contained, is titled together with an outer shell main drum. CONSTITUTION:Plastic material, which is continuously supplied from a vertically upward open material supplying port 8, is filled over two rotors 7, which are disposed in an array in oblique direction, so as to be advanced in a mixing chamber 6 by the pivoting of the rotors 7 and feeder screw flights 10. The plastic material is kneaded at the gap made between the screw flight 10 and the inner surface of the mixing chamber 6 so as to be melted and plasticized in order to be flowed through a discharge port 9 and metered and pressure-fed with a gear pump 4. Next, the plastic material is extruded from a forming die and cut through the rotation of a high speed cutter so as to be granulated into the form of pellets. Because the mixing chamber 6 is tilted, the uniform supplying distribution of material to the two rotors 7 is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a continuous kneading device of the type in which a gear pump for controlling discharge is directly connected to a discharge port for stuffed material.

(Prior Art) Continuous kneading machines and devices for kneading various polymer materials and plastic materials such as plastics and rubber are, needless to say, well-known, and are generally configured in the longitudinal direction. A pair of rotating rotors having screw blades formed on the circumferential surface in the axial direction for moving and kneading the materials are arranged in parallel in the mixing chamber, which has a supply port for the materials to be mixed and a discharge port for the mixed materials at both ends. A heating or cooling heat treatment means such as a heater is attached to the main outer shell surrounding the mixing chamber, and the material input from the supply port is moved forward by the feed screw blade in the rotating rotor. The material enters the kneading section, is kneaded by the stirring and kneading screw blades in the same rotor, and is discharged from the discharge port in a molten state.At this time, as is known, the movement of the material in the mixing chamber is carried out continuously through the input port. The mixing chamber is pushed from the rear by the material and sequentially moved forward, and the internal pressure of the mixing chamber is controlled by a discharge control means provided on the discharge port side. As one such discharge control means, a type in which a gear pump is directly connected to the material discharge port is also known, such as the one disclosed in Japanese Patent Publication No. 56-3091. 8 and 9, only the main parts corresponding to the present invention will be explained below. That is, in the main outer shell 1 of the continuous kneading machine placed horizontally, there are formed two mixing chambers 2 with cylindrical cross sections that are parallel to each other and communicate with each other at the center. A supply port 5 for the material to be mixed is provided with an upward opening, and at the other end, a discharge port 3 for the mixed material is provided with a downward opening. A pair of pumps are installed in a parallel and rotatable manner, and a gear pump 26 as a discharge control means is directly connected to the material discharge port 3. In addition, in such a continuous mixing device, the material to be mixed is not simply kneaded, but the mixed material in a melted and fluidized state is transferred to a pelletizer (for example, as shown in FIG. 9).
(Pelletizer) The other molding machine 28 and the discharge port of the gear pump 26 are connected by a transfer pipe 29 to turn the kneaded material into the desired molded product.Due to the height of each machine, the gear pump 26 It is also known that the kneading machine side including the kneading machine must be installed on the second floor 30 of a two-story building, and the molding machine 28 side including the transfer pipe 29 must be installed separately on the first floor 31. It is. In order to overcome the disadvantages of the two-story structure in the prior art, a new continuous kneading device as shown in Figure 10 has been developed (Modern Plastics International, June 1985).
Published in the monthly issue (Farrell Publishing). That is, as shown in the figure, the kneading machine consisting of the outer shell main body 1, the mixing chamber 2, and the rotors 4, 4 is moved from the horizontal position shown in Fig. 8.9 to 9.
The material supply port 5 is opened upward, while the kneaded material discharge port 3 is opened horizontally, and a gear pump 26 is directly connected to the discharge port 3. The molding machine 28 is directly connected to the gear pump 26, thereby making it possible to install a series of necessary equipment on the first floor 31.

(Problems to be Solved by the Invention) The above-mentioned conventional techniques each have the following problems. In the conventional technology shown in Fig. 8.9, which is a standard continuous kneading device equipped with a gear pump, it goes without saying that the height of the machine increases and the initial cost increases due to the need for a two-story building. , maintenance of the entire machine and operation management are troublesome, and in particular, maintenance of the gear pump that is installed directly below the kneading machine is difficult.Furthermore, the transfer pipe 29, which is a communication passage between the molding machine 28 side and the gear pump 26, is becoming longer, and therefore, the There are problems such as an increase in discharge pressure and the occurrence of unnecessary heat generation troubles.Also, in the improved conventional technology shown in Fig. 10, although the reduction in machine height can be acknowledged, it is difficult to use a continuous kneading machine. Is this kind of thing possible to turn it 90 degrees and make it vertical? The pair of rotating rotors 4, 4, which are most efficiently used in the gYi machine and are parallel to each other in the horizontal direction, are placed in parallel vertically, and this means that the material supply port When the material to be mixed is supplied from the mixing chamber 5, the material is supplied only to the upper rotor 4 side, causing an imbalance in the filling degree of the material between the mixing chamber and the two-shaft rotor. This also results in unevenness in the temperature of the material, which poses a problem in that it is difficult to obtain homogeneous kneading contents.

(Means for Solving the Problems) In order to solve these problems, the present invention provides a method in which the entire mixing chamber including the rotating rotor, which is the main part of the continuous kneading device, is tilted about 1° with respect to the horizontal direction. Specifically, the screw blade rotor that moves and kneads the materials into the mixing chamber, which has a supply port for the materials to be mixed and a discharge port for the mixed materials at both longitudinal ends, is rotatable. In a continuous kneading device in which a gear pump for discharge control is directly connected to the material discharge port, the mixing chamber including the screw blade rotor is installed in a horizontal position inclined with respect to the horizontal direction, and the material supply port is arranged in a vertical direction. The material outlet is opened in the horizontal direction, and the material outlet is opened in the horizontal direction, and a gear pump is directly connected to the outlet.

(Function) According to the above-mentioned technical means of the present invention, FIGS.
As shown in the figures, the main part of the continuous kneading machine 3 is an oblong outer shell having a mixing chamber 6 inside which is equipped with a pair of screw blade rotors 7.7 in parallel and rotatable manner. When the main body 11 is fixedly installed on the target floor surface 12 as shown in FIG. In the example, under an inclination angle of 456, the outer main body 11 is placed in a tilted horizontal position.
Furthermore, a fourth supply port 8 for the material to be mixed is provided in communication with one longitudinal end of the mixing chamber 6.
As shown in the figure, the supply port opens upward in the vertical direction, and the discharge port 9 for the kneaded materials provided in communication with the other longitudinal end of the mixing chamber 6 is connected to the mixing chamber 6 as shown in the sixth figure.
The opening is diagonally downward due to the 45° angle of inclination.
The following effect can be obtained by further turning the gear pump 45'' by 45'' angle and forming it horizontally, and by directly connecting the gear pump 4 to one end facing the horizontal direction. A pelletizer (granulation machine) is connected to a gear pump 4 directly connected to a kneaded material discharge port 9 that is oriented horizontally in a continuous kneading machine 3 that is installed on a floor surface 12 with an angle of 90°. 5 is connected, but as shown in Figure 1 and Figure 6, by installing the device at an angle of 45 degrees, in the case of the horizontal sideways type shown in Figure 8.9, 2 There is no need to separate equipment on both the upper and lower floors, such as a continuous kneading machine on the first floor and a molding machine 28 on the first floor.
This means that the entire gear pump 4 can be connected and arranged in a flat plane on the floor surface 12, which is a floor surface. This can be easily achieved by lowering the overall height of the mechanism by allowing it to be installed in parallel on the top. Furthermore, in the present invention, by opening the material supply port 8 in the inclined mixing chamber 6 in the vertical direction, when the material to be mixed is supplied from the supply port 8, the pair of rotors 7, 7 are arranged in parallel on the slope line. Then, both rotors 7.7 are exposed together toward the upper surface, and the rotors shown in FIG. The receiving area on the diagonally upper rotor 7 side is slightly larger, but since the material for officials tends to fall downward due to its own weight, the 45° angle inclination allows The same amount is supplied to both rotors 7 and 7, and this fills the mixing chamber 6 while being moved and kneaded, resulting in defects such as uneven filling and uneven temperature of the material. A homogeneous melt-kneading result can be maintained without fear.

(Example) A suitable example of the apparatus of the present invention will be described with reference to FIGS. 1 to 7. Series V in the present invention shown in FIG.
f,? As shown in FIGS. 2 and 6, the horizontally long outer shell main body 11 of the R kneading machine 3 is basically divided into main body pieces with the upper and lower boundaries being a line connecting the centers of a pair of screw blade rotors 7.7. 11a and llb and are joined by flanges, and a floor surface 12 is provided on the lower main body piece 11b side.
Stand legs 11c are provided at appropriate locations for fixing to the stand. The mixing chamber 6, which starts from the supply port 8 for the materials to be kneaded and ends at the discharge port 9 for the kneaded materials, and is formed in the main body 11 between the two, has two cylindrical spaces as in the past. A pair of screw blade rotors 7.7, which are inserted in parallel into the mixing chamber 6, have a bicylindrical cross-sectional shape in which they are communicated at the center, and a pair of screw blade rotors 7.7, which are inserted in parallel into the mixing chamber 6, have a shaft circumferential surface on the material supply port 8 side, as in the conventional case. As shown in FIG. 4, a thread-shaped screw blade 10 for feeding the material is formed, and the front kneading section is also provided with a screw blade for kneading, although not shown in the figure. As shown in FIGS. 2 and 3, the rotor shaft extending rearward from the material supply port 8 is supported by appropriate bearings within the main outer shell 11, and both rotor shafts are supported by interlocking gears 13. 13 so as to be rotatable in opposite directions, and one of the rotor shafts is rotatably connected to a motor 1 and a speed reducer 2, as shown in the first figure. These are the same as before. In addition, as shown in FIGS. 1 and 3.4, the material supply port 8 is box-shaped in the embodiment, surrounding the rotor 7.7 and opening upward in the vertical direction. A connecting flange 14.14 is provided in the front and rear direction, and this is attached to the outer shell main body 1.
It is integrated by connecting with a connecting flange 15.15 provided on one side. As shown in FIGS. 2 to 7, the mixing chamber 6 including such a rotor 7.7 is placed at an angle of 45 mm in the horizontal direction parallel to the floor surface 12.
Therefore, one rotor 7 is arranged in the upper part in the inclined direction, and the other rotor 7 is arranged in the lower part, and the material supply port 8 is arranged vertically in the inclined position of the mixing chamber 6. By being designed to open upward in the direction, the pair of rotors 7.7 that are parallel to each other at the bottom of the supply port 8 are able to handle the material from the supply port 8 even if the road surface is different in size. will be exposed to.

The discharge port 9 for mixed materials provided at the other end of the mixing chamber 6 is oriented horizontally when the mixing chamber 6 is tilted at an angle of 45° as shown in FIG. By bending the guide bending part 16 to one side at the part where it communicates with the outlet 9 and further turning it by 45'' angle, the outlet 9
The main flow part of can be directed horizontally as shown and can be obtained with the shortest possible length. By connecting this horizontal open end to the inlet side of the gear pump 4, the gear pump 4 can be installed in parallel on one side of the kneading machine 3 within the same plane.

FIG. 7 shows a known end 17 for closing off the other end of the mixing chamber 6 and for sealingly supporting the other end of the rotor 7.7.

According to this embodiment, for example, when plastic material is granulated and molded by the pelletizer 5, a pair of screw blade rotors 7 and 7 in the continuous kneader 3 are rotated by the motor 1 and the reducer 2. At the same time, a plastic material such as polyethylene or polypropylene is continuously supplied from a material supply port 8 that opens upward in the vertical direction via a measuring feeder (not shown), and the supplied material is fed in an oblique direction. The mixture is filled over both rotors 7 arranged in parallel, and is advanced in the mixing chamber 6 by the rotation of the rotor 7 and feeder screw blades + 110, and known screw blades (not shown) for shearing and stirring in the kneading part.
The material is kneaded and melted and plasticized between the material and the inner surface of the mixing chamber 6, and is extruded by the subsequent material into the material discharge port 9.
is sent to the gear pump 4 side from the horizontally oriented discharge port 9 end. The molten fluid material is pressurized by the gear pump 4 and is forced to the pelletizer 5 side, and a product granulated into pellets is obtained by extrusion from a forming guide and rotary cutting by a high-speed force lid. At this time, it goes without saying that the temperature control of the molten material and the power control in the continuous kneader are performed by controlling the pressure at the discharge port 9 by the rotation speed of the gear pump 4 as is known (similar to the prior art). and
Further, in FIG. 1, after the gear pump 4 (including its drive motor 18 and reduction gear 19) and the pelletizer 5 are retreated downward in the figure, continuous mixing is performed! Moving the mixing chamber 6 side of the fA machine 3 to the left in the figure to perform cleaning and other maintenance is also the same as in conventional machines of this type.

(Effects of the Invention) According to the continuous kneading device of the present invention, the mixing chamber 6 including the screw blade rotor 7.7, together with the outer shell main body 11, is arranged at an angle of 45″ (this angle) with respect to the horizontal direction as in the embodiment. The number of angles (direction can be set freely) and the angle of inclination inside and outside are tilted downwards, which reduces the need for two-story buildings compared to the horizontally lateral arrangement that is often used in the past. This eliminates disadvantages such as difficulties in maintenance of the gear pump 4 and the gear pump 4, and when a molding machine is attached to the molding machine, it can be installed compactly on the floor, and the maintenance of the gear pump 4 is extremely easy. For improvement measures that changed the horizontal sideways orientation by 90 degrees, by changing the horizontal sideways posture,
A pair of screw blade rotors 7 are provided at the material supply port 8.
．． 7 toward the inlet of the supply port, and the inclination makes it possible to distribute the material evenly to both rotors 7, and the material is supplied only to the upper rotor in the vertical direction in the improvement means, thereby reducing the material in the mixing chamber. Eliminates defects that cause unevenness in filling degree and uneven material heat generation temperature, and achieves homogeneous kneading content equivalent to horizontal kneading.
It is excellent in that it can maintain the temperature of the material, and is a great advantage as a continuous kneading means of the type in which a gear pump is directly connected to the material discharge port.

[Brief explanation of drawings]

FIG. 1 is an overall plan view including a molding machine according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along the line C-C in FIG. 1 showing the rotor interlocking part, FIG. 3 is a cross-sectional view taken along the line C-C in FIG. 1 showing the material supply port connection part,
Fig. 4 is a sectional view taken along the line C-C in Fig. 1 showing the main part of the material supply port;
FIG. 5 is a sectional view taken along the line C-C in FIG. 1 showing the cross-sectional shape of the mixing chamber;
FIG. 6 is a sectional view taken along the line C-C in FIG. 1 showing the main part of the material discharge port;
FIG. 7 is a sectional view taken along line C-C in FIG. 1 showing the end portion of the mixing chamber;
Fig. 8.9 is an explanatory diagram of each main part of a horizontal horizontal continuous kneading machine with a gear pump, and Fig. 1O is an explanatory diagram of main parts of the same 90-degree direction change type continuous kneading machine. 1... Drive motor, 2... Reducer, 3... Continuous kneader, 4... Gear pump, 5... Pelletizer, 6
...Mixing chamber, 7...Screw blade rotor, 8...
Material supply port, 9...material discharge port. Patent applicant: Kobe Steel, Ltd.

Claims (1)

[Claims] (1) A screw blade rotor for moving and kneading the materials is rotatably installed in a mixing chamber in which a supply port for materials to be mixed and a discharge port for mixed materials are provided at both ends in the longitudinal direction. In a continuous kneading device in which a gear pump for discharge control is directly connected to the discharge port, the mixing chamber including the screw blade rotor is installed in a horizontal position inclined with respect to the horizontal direction, and the material supply port is opened in the vertical direction, and the material discharge port is opened in the vertical direction. An inclined continuous kneading device characterized in that an outlet is opened in the horizontal direction and a gear pump is directly connected to the outlet.