JPH0338089B2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a twin-screw kneader.

(Prior Art) Continuous kneading machines and devices for kneading various polymeric 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 a mixing chamber in which a supply port for materials to be kneaded and a discharge port for kneaded materials are provided at both ends of the mixing chamber. The main outer shell surrounding the mixing chamber is equipped with heat treatment means for heating or cooling, such as a heater. The materials are transferred to the mixing chamber, are kneaded by the stirring and kneading screw blades in the same rotor, and are discharged in a molten state from the discharge port. The mixing chamber is pushed forward from the rear by the materials continuously introduced from the mixing chamber, 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 and laterally, two mixing chambers 2 having a cylindrical cross section that are parallel to each other and communicate at the central portion are formed.
At one longitudinal end of the mixing chamber 2, a supply port 5 for the material to be kneaded is provided with an upward opening, and at the other end, a discharge port 3 for the kneaded material is provided with a downward opening. A pair of rotors 4, 4 having screw blades are installed parallel and rotatably,
A gear pump 26 as a discharge control means is directly connected to the material discharge port 3. In addition, in such a continuous kneading device, the kneading is not completed by simply kneading the materials to be kneaded, but the kneaded materials that have been brought into a molten and fluidized state are processed using a pelletizer (granulation device) or other device, as shown in Fig. 9, for example. The 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 kneading machine including the gear pump 26 A molding machine 28 whose side is installed on the second floor 30 of a two-story building and includes a transfer pipe 29
It is also known that the sides are forced to be installed separately on the ground floor 31. In order to eliminate the disadvantages of the two-story structure in the conventional technology, a new continuous kneading device as shown in Figure 10 has been developed (published in Modern Plastics International, June 1985 issue... ...Fuarel Inc.). That is, as shown in the figure, the main outer shell 1 and the mixing chamber 2
and a kneading machine consisting of rotors 4, 4,
The material supply port 5 is opened upward, while the kneaded material discharge port 3 is opened horizontally, and the material supply port 5 is opened horizontally. A gear pump 26 is directly connected to the discharge port 3, and a 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 Figs. 8 and 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, troublesome operational management, difficulty in maintaining the gear pump, which is installed directly below the kneading machine, and furthermore, the length of the transfer pipe 29, which is the communication passage between the molding machine 28 side and the gear pump 26, and therefore There are problems such as an increase in the 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 recognized, the continuous kneading machine By changing the direction of the rotors by 90 degrees to make them oriented vertically, the pair of rotating rotors 4, 4, which are parallel to each other in the horizontal direction, is the most efficient and frequently used method in this type of kneading machine. , vertically in parallel vertically, which means that when the material to be kneaded is supplied from the material supply port 5, the material is supplied only to the upper rotor 4 side, and the mixing chamber and the This creates an imbalance in the filling degree of the material between the rotors and the shaft, and this also results in uneven material temperature, which poses a problem in that it is difficult to obtain a homogeneous kneading content.

(Means for solving the problems) In order to solve these problems, the present invention has the following features:
The entire mixing chamber including the rotating rotor, which is the main part of such a continuous kneading device, is tilted with respect to the horizontal direction, and specifically, there is a supply port for the material to be kneaded and a supply port for the kneaded material at both ends in the longitudinal direction. In a continuous kneading device, a screw blade rotor for moving and kneading materials is rotatably installed in a mixing chamber provided with a discharge port, and a gear pump for discharge control is directly connected to the material discharge port. The mixing chamber including the rotor is installed in a horizontal position inclined with respect to the horizontal direction, the material supply port is opened in the vertical direction, and the material discharge port is opened in the horizontal direction, and a gear pump is directly connected to the discharge port. be.

(Function) According to the above-mentioned technical means of the present invention, as shown in FIGS. When installing the horizontally elongated outer shell main body 11 having the mixing chamber 6 installed therein in a parallel and rotatable manner on a target floor surface 12 as shown in FIG. The mixing chamber 6 including the rotor 7 is on the floor 12
In the illustrated example, the mixing chamber 6 is installed together with the main outer shell 11 in an inclined horizontal position at an angle of inclination of 45 degrees with respect to the horizontal direction parallel to the mixing chamber 6. The supply port 8 for the material to be kneaded, which is provided in a continuous manner, is a supply port that opens upward in the vertical direction as shown in the fourth figure, and the supply port 8, which is provided in a continuous manner at the other end in the longitudinal direction of the mixing chamber 6, is a supply port for discharging the mixed materials. As shown in FIG. 6, the outlet 9 is opened obliquely downward as the mixing chamber 6 is inclined at an angle of 45 degrees, and is further turned by an angle of 45 degrees to form a sideways opening in the horizontal direction.
By directly connecting the gear pump 4 to one end facing in the horizontal direction, the following effects can be obtained. That is, FIG. 1 shows a gear pump (discharge control device) directly connected to a kneaded material discharge port 9 oriented horizontally in a continuous kneader 3 according to the present invention, which is installed on a floor surface 12 at an angle of 45 degrees. 4, the target molding machine 1
As an example, a pelletizer (granulating device) 5 is shown connected, but as shown in FIGS. 1 and 6, the 8th,
In the case of the horizontal horizontal type shown in Figure 9, there is no need to separate the equipment on both the upper and lower floors, such as the continuous kneading machine on the second floor and the molding machine 28 on the first floor, and it is possible to use the continuous kneading machine on the second floor and the molding machine 28 on the first floor.
By tilting the mixing chamber 6 and orienting the discharge port 9 horizontally, the gear pumps 4 can be arranged side by side on the same plane. This is easily possible by reducing the overall height. 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 kneaded is introduced and supplied from the supply port 8, the pair of rotors 7, 7 are parallel to each other on the slope line. Then, both rotors 7, 7 are exposed together toward the top surface, and the first
The rotors shown in FIG. Although the receiving area on the rotor 7 side is slightly larger, the input material tends to fall downward due to its own weight, so the 45° angle inclination allows the same amount to be fed to both rotors 7 and 7 sides. Since this is moved and kneaded while filling the mixing chamber 6, a homogeneous melt-kneading result can be maintained without the risk of non-uniform filling or uneven temperature of the materials.

(Example) Appropriate examples of the device of the present invention are shown in Figs. 1 to 7.
This will be explained with reference to the figures. Basically, the horizontally long outer shell main body 11 of the continuous kneader 3 of the present invention shown in FIG. 1 connects the centers of a pair of screw blade rotors 7, 7, as shown in FIGS. 2 and 6. Main body pieces 11a, 11b with the upper and lower lines as boundaries
The main body piece 11b on the lower side is provided with a stand leg 11c at an appropriate position to be fixed to the floor 12. The mixing chamber 6, which is formed in the main body 11 between the two starting from the supply port 8 for the material to be kneaded and ending at the discharge port 9 for the kneaded material, has two cylindrical spaces as in the past. A pair of screw blade rotors 7, 7 are inserted in parallel into the mixing chamber 6, and have a bicylindrical cross-sectional shape in which the rotors are communicated at the center.
As in the conventional case, screw-shaped screw blades 10 for feeding the material are formed on the peripheral surface of the shaft from the material supply port 8 side as shown in FIG. 4, and the front kneading section is not shown. However, it is equipped with screw blades for kneading as in the past, and the rotor shaft extending rearward from the material supply port 8 is
As shown in FIGS. 2 and 3, the main body 11 is supported by appropriate bearings, and
Both rotor shafts are rotatably connected in opposite directions by interlocking gears 13, 13, and one of the rotor shafts is rotatably connected to a motor 1 and a speed reducer 2, as shown in the first diagram. It is said that These are the same as before. In addition, as shown in FIG. 1 and FIGS. 3 and 4, the material supply port 8 is in the form of a box that surrounds the rotors 7 and 7 and is opened upward in the vertical direction. Connection flange 14,1
4 in the front-rear direction, and are integrated by connecting with connecting flanges 15, 15 provided on the outer shell main body 11 side. Such a rotor 7,7
As shown in FIGS. 2 to 7, the mixing chamber 6 including the Therefore, one rotor 7 is arranged in parallel at the upper side in the inclined direction, and the other rotor 7 is arranged at the lower side, and the material supply port 8 is designed to open upward in the vertical direction when the mixing chamber 6 is in the inclined position. As a result, the pair of rotors 7, 7 that are parallel to each other at the bottom of the supply port 8 are both exposed to the material input from the supply port 8, even if the road surfaces are different in size. The mixed material outlet 9 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 degrees, as shown in FIG. By bending the guide bending part 16 to one side at the part communicating with the outlet 9 and further changing the direction by an angle of 45 degrees, 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 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 in the continuous kneading machine 3 are controlled by the motor 1 and the reducer 2. , 7, and 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 weighing feeder (not shown), and the supplied material The mixture is filled over both rotors 7 arranged in parallel in a diagonal direction, and is advanced in the mixing chamber 6 by the rotation of the rotor 7 and the screw blades 10 for the feeder to form a known screw for shear stirring in the kneading section. The material is kneaded and melted and plasticized between the vane (not shown) and the inner surface of the mixing chamber 6, and is extruded by the following material and flows through the material outlet 9 in a shape, and the end of the horizontal outlet 9 is extruded by the following material. It is sent to the gear pump 4 side. The molten fluid material is pressurized by the gear pump 4 and is forced into the pelletizer 5, where it is extruded from a molding die and cut by rotation with a high-speed cutter to obtain a product granulated into pellets. At this time, it goes without saying that the temperature control of the molten material and the power control in the continuous kneading machine are performed by controlling the pressure at the discharge port 9 by the rotation speed of the gear pump 4, as is known, and as is well known in the art. Similarly, in FIG. 1, after the gear pump 4 (including its drive motor 18 and reduction gear 19) and pelletizer 5 are retreated downward in the figure, the mixing chamber 6 side of the continuous kneader 3 is shown in the figure. Moving it to the left and performing cleaning and other maintenance is also the same as with conventional devices 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 rotors 7, 7 is connected to the outer shell main body 11.
In addition, by tilting the camera at an angle of 45 degrees (this angle value can be freely set) to the horizontal direction as shown in the example below, it is possible to achieve the most commonly used posture in the past. Compared to the horizontal horizontal arrangement, it eliminates the disadvantages such as the need for a two-story building and the difficulty of maintaining the gear pump, and when installing a molding machine, it can be installed compactly on the same floor, and the gear pump 4 can be installed compactly on the same floor. Maintenance is also greatly facilitated. In addition, with respect to the improvement means in which the horizontal sideways orientation shown in FIG. In addition, the inclination makes it possible to distribute the material evenly to both rotors 7, and the degree of material filling in the mixing chamber is uneven due to the material being supplied only to the vertically upper rotor 7 in the improvement means. It is superior in that it eliminates defects that cause unevenness in material heat generation temperature and ensures homogeneous kneading content equivalent to that of the horizontal type, 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 the drawing]

Fig. 1 is an overall plan view including a molding machine according to an embodiment of the present invention, and Fig. 2 is a diagram showing a rotor interlocking part.
3 is a sectional view taken along the line B-B in FIG. 1 showing the material supply port connecting 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, and FIG. 1 is a sectional view taken along the line D-D in FIG. 1 showing the cross-sectional shape of the mixing chamber, FIG. 6 is a sectional view taken along the line E-E in FIG. 1 showing the main part of the material discharge port, and FIG. Figure F-F line sectional view,
8 and 9 are explanatory diagrams of the main parts of the horizontal lateral continuous kneading machine equipped with a gear pump, and FIG. 10 is an explanatory diagram of the main parts of the same 90 degree continuous kneading machine. 1... Drive motor, 2... Reducer, 3... Continuous kneading machine, 4... Discharge control device (gear pump), 5... Pelletizer, 6... Mixing chamber, 7... Screw blade rotor, 8... Material supply port, 9... Material discharge Exit.

Claims (1)

[Claims] 1. Supply ports 8 for the material to be kneaded on both ends in the material conveyance direction.
and a mixing chamber 6 provided with a discharge port 9 for the mixed materials.
A pair of rotors 7, 7 for conveying and kneading the materials are inserted into the inside so as to be rotatable and parallel to each other.
In a two-shaft kneading machine in which a discharge control device 4 is directly connected to the discharge port 9, the mixing chamber 6 including the rotors 7, 7 is arranged in a horizontal position inclined with respect to the horizontal in its lateral direction, and the discharge port 9 is opened in the horizontal and lateral direction of the mixing chamber 6, and the supply port 8 is connected to a pair of rotors 7,
7 are opened in the vertical direction of the mixing chamber 6 so as to be exposed in the supply port 8.