CN106956415A - Combined double-rotor continuous mixing extruder - Google Patents

Abstract

The invention discloses a combined double-rotor continuous mixing extruder, which includes two rotors, the rotors include a number of rotor elements and mandrels, each of the rotor elements is arranged along the axial direction of the mandrel, and each The rotor element is secured to the mandrel by a keyed connection. Through the application of the invention, the adaptability of the process is strengthened, different mixing requirements can be met, the fluidity restriction of the material is reduced, and the defect that the material is exposed to the air between the mixer and the extruder is avoided.

Description

Combined double rotor continuous mixing extruder

technical field

The invention relates to a combined double-rotor continuous mixing extruder.

Background technique

In the process of rubber and plastic processing, it is usually necessary to add various additives (such as lubricants, anti-aging agents, fillers, cross-linking agents, etc.) On the other hand, when manufacturing rubber-plastic blends and polymer alloys, high-quality mixing is also required. This puts high demands on the mixing equipment for rubber and plastic processing.

At present, manufacturing plants usually use internal mixers, twin-screw compounding extruders and twin-rotor continuous mixers to mix materials. Among them, the double-rotor continuous mixing machine is a new type of continuous mixing machine developed and manufactured by the American Farrel Company in the mid-1960s on the basis of its famous brand product Banbury internal mixer. The shape of the machine is very similar to a twin-screw extruder, but the feeding and discharging methods are different. Because the machine not only retains the excellent mixing characteristics of the internal mixer, but also can work continuously, and its production capacity is large, easy to operate and maintain, so it has attracted people's attention. It is used in filling modified polymer materials and functional polymer materials. widely used in manufacturing.

The shape of the working part of the rotor of the double-rotor continuous mixer is shown in Figure 1. According to its different functions, it can be divided into feeding section A, first mixing section B, conveying section C, second mixing section D and unloading section. Paragraph E. The feeding section A of the rotor is a threaded section, which mainly transports the material added from the feeding port to the first mixing section B of the rotor; the first mixing section B of the rotor generally has two pairs of screw edges with opposite helical directions. The helical angles of the ribs are different. Under the action of the helical ribs, the material has undergone a reciprocating and overlapping fitting mixing effect, and can be dispersed and mixed; like the feeding section A of the rotor, the conveying section C is also a threaded section. The material in the first mixing section B is transported to the second mixing section D for further mixing and mixing; the cross section of the discharge section E of the rotor is generally elliptical or cylindrical, and the mixed material is mainly passed through The discharge port discharges the cylinder mixing chamber.

The current double-rotor continuous mixer still has the following problems: First, the rotor and the barrel usually adopt an integral structure, and it is impossible to use rotors with different structures in different areas of the mixer to achieve different mixing processes according to different mixing processes. The function is to meet the corresponding mixing requirements, and the process adaptability is poor; second, due to the limitation of the length of the rotor, the residence time of the material is short, and the fluidity of the material is greatly restricted; third, the extrusion and mixing of the equipment The functions are separated, and a two-stage arrangement is adopted, that is, the twin-rotor continuous mixer is placed on the single-screw extruder, and the mixed material discharged from the twin-rotor continuous mixer enters the single-screw extruder to build pressure and extrude Granulate. This process causes the material to be exposed to the air from the mixer to the extruder, which affects the product quality, and at the same time, it also brings many difficulties to the stable operation of the equipment.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the poor process adaptability of the existing double-rotor continuous mixer, it is difficult to meet the corresponding mixing requirements, and the fluidity of the material is greatly restricted, so that the material is transferred from the mixer to the extruder. To solve the defect of being exposed to the air between the extruders, a combined double-rotor continuous mixing extruder is provided.

The present invention solves the above technical problems through the following technical solutions:

A combined double-rotor continuous mixing extruder, including two rotors, is characterized in that the rotors include a number of rotor elements and mandrels, and each of the rotor elements is arranged along the axial direction of the mandrel, and each The rotor element is secured to the mandrel by a keyed connection.

Preferably, the rotor element is connected to the mandrel through a spline or a flat key. One end of the mandrel is connected to the output shaft of the gearbox through a coupling, and bears the transmitted torque and speed. On the other hand, the torque and speed transmitted from the gearbox are distributed to each rotor element through splines or flat keys. The rotor element and the mandrel are connected to form the rotor of the device.

Preferably, the rotor element includes a threaded element, and the outer surface of the threaded element is provided with rectangular threads.

Preferably, the number of starts of the rectangular thread is 1-4.

Preferably, the rotor element includes a kneading element, the outer surface of the kneading element is provided with helicoids, and the cross-sectional shape of the kneading element is a convex ellipse composed of asymmetric ellipses.

Preferably, the number of threads of the flight is 2-4.

Preferably, the rotor element includes a throttling element, and the outer surface of the throttling element is a cylinder.

Preferably, the combined twin-rotor continuous mixing extruder further includes a central support device with an adjustable gap, and the central support device with an adjustable gap is used to adjust the gap with the throttling element. The smaller the gap, the greater the resistance of the material passing through the gap, the higher the filling rate of the material in the mixing section, and the higher the intensity of mixing experienced by the material. According to the characteristics of the material, properly adjusting the size of the gap can control the mixing degree and mixing effect experienced by the material in the mixing and kneading section.

Preferably, the central support device with adjustable gap includes an upper slide, a lower slide, and a driving device for adjusting the distance between the upper slide and the lower slide. The gap between the inner hole of the slide plate and the throttling element constitutes a melt-lubricated and self-lubricating sliding bearing, which acts as an intermediate support for the rotor. At the same time, by adjusting the size of the gap, the filling degree of the material in the rotor mixing area can also be controlled.

Preferably, the driving device includes an adjusting screw, which cooperates with the upper sliding plate and is used to drive the upper sliding plate to move. When working, the gap-adjustable central support device causes the upper and lower slides to slide toward each other by adjusting the screw rod, and adjusts the size of the gap between the inner hole of the upper slide and the lower slide to the outer surface of the throttling element, thereby controlling the resistance of the melt to pass through. Purpose.

Preferably, the combined twin-rotor continuous mixing extruder includes several barrel parts, and the barrel parts are used to accommodate the rotor parts.

Preferably, the barrel part includes a mixing section barrel, and the mixing section barrel includes two interconnected holes.

Preferably, the barrel part includes a delivery section barrel, and the delivery section barrel includes two interconnected holes.

Preferably, the cylinder part includes a cylinder body of a feeding section, and the cylinder body of the feeding section includes a feeding port and two cavities, wherein the two cavities extend in a direction located on one side of the feeding port connected, and not connected in the direction extending from the other side of the feeding port.

Preferably, the barrel part includes a barrel of a secondary feeding section, and the barrel of the secondary feeding section includes a feeding port and two interconnected holes.

Preferably, the cylinder component includes a cylinder of an exhaust section, and the cylinder of the exhaust section includes an exhaust port and two interconnected holes.

Preferably, the barrel part includes an extrusion section barrel, and the extrusion section barrel includes two holes that are not connected to each other.

By arranging different rotor elements in different areas and cooperating with corresponding cylinder elements, different mixing functions can be realized. For example: the mixing element cooperates with the cylinder of the mixing section to form a mixing section; the screw element cooperates with the cylinder of the mixing section to form a conveying section; The gas section; the screw element cooperates with the feeding section cylinder to form the feeding section; the thread element cooperates with the extrusion section cylinder to form the extrusion section; the throttling element cooperates with the gap-adjustable central support device to form a Constitute a throttling adjustment section.

Preferably, the cylinder part is provided with a cooling channel, and the cooling channel can pass through heat transfer oil or water for cooling.

Preferably, the cylinder part is provided with a heater.

Preferably, the cylinder part is provided with a thermocouple hole, which can measure the temperature of the cylinder and the material.

In the present invention, the above-mentioned preferred conditions can be combined arbitrarily on the basis of conforming to common knowledge in the field, so as to obtain various preferred embodiments of the present invention.

The positive progress effect of the present invention is: through the application of the present invention, the adaptability of the process is strengthened, different mixing requirements can be met, the fluidity restriction of the material is reduced, and the exposure of the material from the mixer to the extruder is avoided. Flaws in the air.

Description of drawings

Fig. 1 is a structural schematic diagram of the rotor of a double-rotor continuous kneader in the prior art.

Fig. 2 is a schematic structural view of the cylinder body of the mixing section and the cylinder body of the conveying section in a preferred embodiment of the present invention.

Fig. 3 is a schematic structural view of the cylinder body of the feeding section in a preferred embodiment of the present invention.

Fig. 4 is a schematic structural view of the cylinder body of the secondary feeding section and the cylinder body of the exhaust section in a preferred embodiment of the present invention.

Fig. 5 is a schematic structural view of the barrel of the extrusion section in a preferred embodiment of the present invention.

Fig. 6 is a schematic structural view of a threaded element in a preferred embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a mixing element in a preferred embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a throttling element in a preferred embodiment of the present invention.

Fig. 9 is a schematic structural diagram of the connection of rotor elements in a preferred embodiment of the present invention.

Fig. 10 is a schematic diagram of the internal structure of the cylinder part of the preferred embodiment of the present invention.

Fig. 11 is a schematic structural view of a central support device with adjustable gaps according to a preferred embodiment of the present invention.

Fig. 12 is a schematic side view of a central support device with adjustable clearance in a preferred embodiment of the present invention.

detailed description

The preferred embodiments are given below, and the present invention will be described more clearly and completely in conjunction with the accompanying drawings.

The function of the present invention discloses a combined double-rotor continuous mixing extruder, which includes two rotors, the rotors include a number of rotor elements and mandrels, each of the rotor elements is arranged along the axial direction of the mandrel, and Each of the rotor elements is secured to the mandrel by a keyed connection.

As shown in Figures 2-5, the combined twin-rotor continuous mixing extruder includes several barrel parts, and the barrel parts are used to accommodate the rotor parts.

Wherein the barrel part 1 shown in FIG. 2 can be used as a barrel of a mixing section or a barrel of a conveying section, and the barrel of a mixing section or a barrel of a conveying section includes two interconnected holes.

The cylinder part 2 shown in Fig. 3 can be used as the cylinder body of the feed section, and the cylinder body of the feed section includes a feed port 21 and two cavities, wherein the two cavities extend on one side of the feed port. It is connected in the direction, and it is not connected in the direction extending on the other side of the feeding port.

The cylinder part 3 shown in Fig. 4 can be used as the cylinder body of the secondary feeding section or the cylinder body of the exhaust section, and the cylinder body of the secondary feeding section (or the cylinder body of the exhaust section) includes a feeding port 31 (or an exhaust port 31 ) and two interconnected cavities.

The barrel member 4 shown in FIG. 5 can be used as an extrusion section barrel, and the extrusion section barrel includes two holes that are not connected to each other.

As shown in FIG. 10 , each of the cylinder parts is provided with a cooling channel 13 , and the cooling channel 13 can be passed through heat transfer oil or water for cooling. The cartridge part is also provided with a heater 14 . The cylinder part is provided with a thermocouple hole, which can measure the temperature of the cylinder and the material.

Figures 6, 7 and 8 show the rotor elements.

Wherein, the rotor element 5, the rotor element 6, the rotor element 7 and the rotor element 8 shown in Fig. 6 are thread elements, and the outer surfaces of the thread elements are provided with rectangular threads. The number of heads of the rectangular thread is 1-4 heads.

The rotor element 9 and the rotor element 10 shown in FIG. 7 are kneading elements, and the outer surface of the kneading element is provided with screw flights. The number of heads of the screw flight is 2-4.

The rotor element 11 shown in FIG. 8 is a throttling element, and the outer surface of the throttling element is a cylinder.

Wherein, the rotor element is connected with the mandrel through a spline or a flat key. One end of the mandrel is connected to the output shaft of the gearbox through a coupling, and bears the transmitted torque and speed. On the other hand, the torque and speed transmitted from the gearbox are distributed to each rotor element through splines or flat keys. The rotor element and the mandrel are connected to form the rotor of the device. As shown in Figure 9, it is a schematic structural diagram of the assembled rotor, which includes a conveying section A, a mixing section B, a throttling adjustment section C, a conveying section D, a mixing section E and an extrusion section F. It can be seen from the figure. Each segment is formed by splicing different rotor elements.

As shown in Figures 11 and 12, the combined twin-rotor continuous mixing extruder also includes a central support device 12 with an adjustable gap, and the central support device 12 with an adjustable gap is used to adjust the distance between the throttling element and the throttle element. the gap between. The smaller the gap, the greater the resistance of the material passing through the gap, the higher the filling rate of the material in the mixing section, and the higher the intensity of mixing experienced by the material. According to the characteristics of the material, properly adjusting the size of the gap can control the mixing degree and mixing effect experienced by the material in the mixing and kneading section.

The central support device 12 with adjustable clearance includes an upper slide 121 , a lower slide 122 , and an adjusting screw 126 for adjusting the distance between the upper slide 121 and the lower slide 122 . A fixing plate 123 is arranged on the upper sliding plate, and an adjusting screw 126 passes through a flat plate 125 , and the flat plate 125 is fixed on the guide post 124 . One end of the adjusting screw 126 is matched with the upper slide plate 121 and the fixed plate 123 , and the other end is connected with a running wheel 127 . Turning the running wheel 127 can drive the upper slide plate 121 to move. When working, the gap-adjustable central support device 12 causes the upper and lower slides to slide toward each other by adjusting the screw rod 126, and adjusts the size of the gap between the inner hole of the upper slide and the lower slide to the outer surface of the throttling element, thereby controlling the resistance of the melt to pass through size purpose. The gap between the inner hole of the slide plate and the throttling element constitutes a melt-lubricated and self-lubricating sliding bearing, which acts as an intermediate support for the rotor. At the same time, by adjusting the size of the gap, the filling degree of the material in the rotor mixing area can also be controlled. Wherein the flare angle α of the inner hole 12 in Fig. 12 is 5-50 degrees.

In the present invention, the above-mentioned preferred conditions can be combined arbitrarily on the basis of conforming to common knowledge in the field, so as to obtain various preferred embodiments of the present invention.

The positive progress effect of the present invention is: through the application of the present invention, the adaptability of the process is strengthened, different mixing requirements can be met, the fluidity restriction of the material is reduced, and the exposure of the material from the mixer to the extruder is avoided. Flaws in the air. Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims (20)

1. a kind of combined Double-rotor continuous mixing extruder, including two roots rotors, it is characterised in that The rotor includes some rotor elements and plug, and each rotor elements are arranged along the axial direction of the plug Arrange, and each rotor elements are fastened on the plug by key.

2. combined Double-rotor continuous mixing extruder as claimed in claim 1, it is characterised in that The rotor elements are connected by spline or flat key with the plug.

3. combined Double-rotor continuous mixing extruder as claimed in claim 1, it is characterised in that The rotor elements include screwing element, and the outer surface of the screwing element is provided with rectangular thread.

4. combined Double-rotor continuous mixing extruder as claimed in claim 3, it is characterised in that The head number of the rectangular thread is 1-4 heads.

5. combined Double-rotor continuous mixing extruder as claimed in claim 1, it is characterised in that The rotor elements include mixing elementses, and the outer surface of the mixing elementses is provided with spiral shell rib, the mixing The shape of cross section of element is that the convex being made up of Asymmetric Elliptic is oval.

6. combined Double-rotor continuous mixing extruder as claimed in claim 5, it is characterised in that The head number of the spiral shell rib is 2-4 heads.

7. combined Double-rotor continuous mixing extruder as claimed in claim 1, it is characterised in that The rotor elements include restricting element, and the outer surface of the restricting element is cylinder.

8. combined Double-rotor continuous mixing extruder as claimed in claim 7, it is characterised in that The combined Double-rotor continuous mixing extruder also include the adjustable central support device in gap, it is described between The adjustable central support device of gap is used to adjust the gap between the restricting element.

9. combined Double-rotor continuous mixing extruder as claimed in claim 8, it is characterised in that The adjustable central support device in gap includes upper slide, lower skateboard, and for adjusting the upper cunning The drive device of distance between plate and the lower skateboard.

10. combined Double-rotor continuous mixing extruder as claimed in claim 9, it is characterised in that The drive device includes adjusting screw, and the adjusting screw coordinates with the upper slide, and for driving The upper slide movement.

11. the combined Double-rotor continuous mixing extruder as described in claim 1-10 any one, its It is characterised by, the combined Double-rotor continuous mixing extruder includes some cylinder parts, the cylinder Part is used to accommodate the rotor part.

12. combined Double-rotor continuous mixing extruder as claimed in claim 11, it is characterised in that The cylinder part includes mixing section cylinder, and the mixing section cylinder includes two interconnected vestibules.

13. combined Double-rotor continuous mixing extruder as claimed in claim 11, it is characterised in that The cylinder part includes transportation section cylinder, and the transportation section cylinder includes two interconnected vestibules.

14. combined Double-rotor continuous mixing extruder as claimed in claim 11, it is characterised in that The cylinder part includes feeding section cylinder, and the feeding section cylinder includes charge door and two vestibules, its In, two cavitys are connected on the direction extended positioned at the charge door side, and positioned at described Do not connected on the direction of charge door opposite side extension.

15. combined Double-rotor continuous mixing extruder as claimed in claim 11, it is characterised in that The cylinder part includes secondary charging section cylinder, and the secondary charging section cylinder includes charge door and two Interconnected vestibule.

16. combined Double-rotor continuous mixing extruder as claimed in claim 11, it is characterised in that The cylinder part includes gas exhaust section barrel body, and the gas exhaust section barrel body includes exhaust outlet and two are interconnected Vestibule.

17. combined Double-rotor continuous mixing extruder as claimed in claim 11, it is characterised in that The cylinder part includes extruding zone cylinder, and the extruding zone cylinder includes two mutual non-intercommunicating pores Chamber.

18. combined Double-rotor continuous mixing extruder as claimed in claim 11, it is characterised in that The cylinder part is provided with cooling duct.

19. combined Double-rotor continuous mixing extruder as claimed in claim 11, it is characterised in that The cylinder part sets having heaters.

20. combined Double-rotor continuous mixing extruder as claimed in claim 11, it is characterised in that The cylinder part is provided with thermocouple hole.