Adjustable double-screw structure of extruder

Abstract

The utility model relates to the technical field of extruders, and discloses an adjustable double-screw structure of an extruder, which comprises a main shell of the extruder, a first inner shell, a second inner shell, a first screw and a second screw are arranged in the main shell, and threads of the first screw and threads of the second screw can be matched with each other. One end of the first screw rod and one end of the second screw rod are respectively provided with a first motor, one side of the main shell is provided with a fixing frame a, the fixing frame a is provided with a first driving mechanism used for driving the first inner shell to move, the other side of the main shell is provided with a fixing frame b, and the fixing frame b is provided with a second driving mechanism used for driving the second inner shell to move; compared with the prior art, the mixing device has the advantages that the gap between the first screw rod and the second screw rod can be adjusted through the first driving mechanism and the second driving mechanism, and meanwhile, the volume of the mixing cavity formed by matching the first inner shell and the second inner shell with the main shell is also changed, so that the mixing requirements of various plastic materials are met, and the application range is wide.

Description

TECHNICAL FIELD

[0001] The utility model relates to extruder technical field especially relates to adjustable double screw structure of extruder. BACKGROUND

[0002] Extruders are often used in plastic processing industry for processing, double screw extruders are developed on the basis of single screw extruders, and are widely applied to the forming processing of extruded products due to good feeding performance, mixing plasticizing performance and extrusion stability.

[0003] Different plastic materials have different requirements for screw gap and rotating speed when mixing and fusing in the extruder, and the existing double screw extruder has relatively simple functions, for example, the double screw extruder disclosed in Chinese patent CN211518447U, the screw of the double screw extruder is fixed and cannot be moved, the gap between the screw threads cannot be adjusted at will, and the universality is poor, therefore, the inventor makes new invention. SUMMARY

[0004] The utility model discloses a kind of adjustable double screw structures of extruder, which has the advantage of adjustable screw pitch.

[0005] To achieve the above object, a kind of adjustable double screw structure of extruder of the utility model, including the main casing of extruder, the main casing is provided with symmetrical first inner casing and second inner casing, the both ends of first inner casing are provided with clamp jaw a, the both ends of second inner casing are provided with clamp jaw b, the main casing is provided with first screw that is movably connected with clamp jaw a and second screw that is movably connected with clamp jaw b, the thread of first screw and the thread of second screw can be mutually matched, one end of the first screw and the second screw is provided with first motor respectively, one side of the main casing is provided with fixed frame a, fixed frame a is provided with first drive mechanism for driving first inner casing to move, the other side of the main casing is provided with fixed frame b, fixed frame b is provided with second drive mechanism for driving second inner casing to move, further including fixed plate fixedly installed on extruder, the fixed plate is provided with guide rail, first motor is provided with guide groove connected with guide rail.

[0006] Further, the fixed frame a and the fixed frame b are provided with second motor, the second motor is provided with threaded shaft, the first drive mechanism and the second drive mechanism are provided with threaded sleeve connected with threaded shaft.

[0007] Further, the main casing is provided with a plurality of positioning holes on both sides, the first drive mechanism is provided with first connecting plate, the first connecting plate is provided with first connecting rod connected to first inner casing by passing through positioning hole, and both ends of the first connecting plate are movably connected with fixed frame a.

[0008] Further, the fixed frame a is provided with a first guide plate, and two ends of the first connecting plate are provided with first connecting ports movably connected with the first guide plate.

[0009] Preferably, a heater is arranged on the connecting plate, and the heater extends to the inside of the main shell through the first connecting rod.

[0010] Further, the second driving mechanism is provided with a second connecting plate, the second connecting plate is provided with a second connecting rod connected to the second inner shell through a positioning hole, and two ends of the second connecting plate are movably connected with the fixed frame b.

[0011] Further, the fixed frame b is provided with a second guide plate, and two ends of the second connecting plate are provided with second connecting ports movably connected with the second guide plate.

[0012] Further, the second connecting rod is provided with a feeding pipe.

[0013] Further, the top of the main shell is provided with a feeder.

[0014] Beneficial effects: compared with the prior art, the adjustable double screw structure of the extruder comprises a main shell of the extruder, a first inner shell, a second inner shell, a first screw rod and a second screw rod arranged in the main shell, threads of the first screw rod and threads of the second screw rod can be matched with each other, one end of the first screw rod and one end of the second screw rod are respectively provided with a first motor, one side of the main shell is provided with a fixed frame a, the fixed frame a is provided with a first driving mechanism for driving the first inner shell to move, the other side of the main shell is provided with a fixed frame b, and the fixed frame b is provided with a second driving mechanism for driving the second inner shell to move; the extruder has the following advantages: the gap between the first screw rod and the second screw rod can be adjusted through the first driving mechanism and the second driving mechanism, meanwhile, the volume of a mixing cavity formed by the first inner shell, the second inner shell and the main shell will also change, the mixing demand of various plastic materials can be met, and the use range is wide. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic view of the utility model.

[0016] Figure 2 It is a local structure schematic view of the utility model.

[0017] Figure 3 It is a local structure exploded schematic view of the utility model.

[0018] Figure 4 It is a fixed frame a and fixed frame b structure schematic view of the utility model.

[0019] The reference signs include:

[0020] Main shell--1, first inner shell--11, clamping jaw a--111, first screw--112, second inner shell--12, clamping jaw b--121, second screw--122, first motor--13, guide groove--131, positioning hole--14, feeder--15, fixing bracket a--2, second motor--21, threaded shaft--22, first guide plate--23, first driving mechanism--3, threaded sleeve--31, first connecting plate--32, first connecting rod--33, first connecting port--34, heater--35, fixing bracket b--4, second guide plate--41, second driving mechanism--5, second connecting plate--51, second connecting rod--52, second connecting port--53, feeding pipe--54, fixing plate--6, guide rail--61. DETAILED DESCRIPTION

[0021] The following is combined with Figures 1 to 4 The utility model is described in detail.

[0022] The utility model discloses an adjustable twin-screw structure of an extruder, comprising a main housing 1 of the extruder, wherein a symmetrical first inner housing 11 and a second inner housing 12 are provided in the main housing 1, wherein the first inner housing 11 and the second inner housing 12 are both arc-shaped, and the first inner housing 11 and the second inner housing 12 cooperate with the top and the bottom of the main housing 1 to form a mixing chamber, and claws a111 are provided at both ends of the first inner housing 11, and claws b121 are provided at both ends of the second inner housing 12, and a first screw 112 movably connected to the claw a111 and a second screw 122 movably connected to the claw b121 are provided in the main housing 1. Figure 2As shown, the threads of the first screw rod 112 and the threads of the second screw rod 122 can be matched with each other to stir the plastic material interactively; one end of the first screw rod 112 and the second screw rod 122 is respectively provided with a first motor 13, and the power on, the power off, the rotating speed and the like of the two first motors 13 are synchronous, so that the threads of the first screw rod 112 and the second screw rod 122 are avoided from colliding with each other to cause equipment failure. One side of the main shell 1 is provided with a fixed frame a2, the fixed frame a2 is provided with a first driving mechanism 3 for driving the first inner shell 11 to move, the other side of the main shell 1 is provided with a fixed frame b4, the fixed frame b4 is provided with a second driving mechanism 5 for driving the second inner shell 12 to move, the gap between the first screw rod 112 and the second screw rod 122 can be adjusted through the first driving mechanism 3 and the second driving mechanism 5, and the volume of the mixing cavity formed by the first inner shell 11, the second inner shell 12 and the main shell 1 also changes, so that the mixing requirements of various plastic materials are met and the use range is wide. The utility model scheme further includes a fixed plate 6 fixedly installed on the extruder, the fixed plate 6 is provided with a guide rail 61, and the first motor 13 is provided with a guide groove 131 connected with the guide rail 61. When the first screw rod 112 and the second screw rod 122 move, the two first motors 13 also move, and through the connection of the guide rail 61 and the guide groove 131, the first motor 13 can stably move transversely, and the structural stability is high.

[0023] The fixed frame a2 and the fixed frame b4 are provided with a second motor 21, the second motor 21 is provided with a threaded rotating shaft 22, and the first driving mechanism 3 and the second driving mechanism 5 are provided with a threaded sleeve 31 connected with the threaded rotating shaft 22. Through the connection mode of the threaded rotating shaft 22 and the threaded sleeve 31, the rotational kinetic energy of the second motor 21 is converted into linear kinetic energy to drive the first inner shell 11 and the second inner shell 12 to move, and similarly, the power and the rotating speed of the two second motors 21 are synchronous, and the precision is high.

[0024] The main shell 1 is provided with a plurality of positioning holes 14 on both sides, the first driving mechanism 3 is provided with a first connecting plate 32, the first connecting plate 32 is provided with a first connecting rod 33 connected to the first inner shell 11 through the positioning hole 14, and the two ends of the first connecting plate 32 are movably connected with the fixed frame a2. The threaded sleeve 31 of the first driving mechanism 3 is fixedly connected with the first connecting plate 32, the second motor 21 rotates the threaded rotating shaft 22 to drive the first connecting plate 32 to move, and then drive the first inner shell 11 to move, since the clamping jaw a111 is connected with the first screw rod 112, the first inner shell 11 drives the first screw rod 112 to move synchronously.

[0025] More specifically, the fixed frame a2 is provided with a first guide plate 23, and the two ends of the first connecting plate 32 are provided with a first connecting port 34 movably connected with the first guide plate 23. The first guide plate 23 is provided with two parallel first guide plates 23 for improving the stability of the first connecting plate 32 when moving.

[0026] The connecting plate is provided with a heater 35, which extends through the first connecting rod 33 to the inside of the main shell 1. The heater 35 is used to heat the mixing cavity between the first inner shell 11 and the second inner shell 12, facilitating the mixing and stirring.

[0027] The second driving mechanism 5 is provided with a second connecting plate 51, which is provided with a second connecting rod 52 connected to the second inner shell 12 through the positioning hole 14, and the two ends of the second connecting plate 51 are movably connected with the fixing frame b4. The threaded sleeve 31 of the second driving mechanism 5 is fixedly connected with the second connecting plate 51, the second motor 21 rotates the threaded shaft 22 to make the second connecting plate 51 move, and then the second inner shell 12 moves, and since the clamping jaw b121 is connected with the second screw rod 122, the second inner shell 12 drives the second screw rod 122 to move synchronously.

[0028] More specifically, the fixing frame b4 is provided with a second guide plate 41, and the two ends of the second connecting plate 51 are provided with a second connecting port 53 movably connected with the second guide plate 41. The second guide plate 41 is provided in parallel with two second guide plates 41, which are used to improve the stability of the second connecting plate 51 when moving.

[0029] The second connecting rod 52 is provided with a feeding pipe 54. During the mixing and stirring process in the main shell 1, chemical reagents, coloring particles and the like can be added through the feeding pipe 54, and the feeding is more convenient.

[0030] The top of the main shell 1 is provided with a feeder 15. The feeder 15 is provided with two, and the feeder 15 close to the first motor 13 is mainly used for feeding solid raw materials, and the other feeder 15 is mainly used for feeding fluid. According to different material mixing and stirring requirements, a variety of feeding methods can be adopted, the use range is wide, and the functionality is various.

[0031] The above is only a preferred embodiment of the present application, for those skilled in the art, according to the idea of the present application, the specific embodiment and application range will be changed, and the content of the specification should not be understood as the limitation of the present application.

Claims

1. An adjustable twin-screw structure of an extruder comprising a main housing (1) of the extruder, characterized in that: The first inner casing (11) is provided with clamping jaws a (111) at both ends, and the second inner casing (12) is provided with clamping jaws b (121) at both ends.

2. An extruder adjustable twin screw configuration according to claim 1, characterized in that: The fixed frame a (2) and the fixed frame b (4) are both provided with a second motor (21), and the second motor (21) is provided with a threaded rotating shaft (22).

3. An extruder adjustable twin screw configuration according to claim 1, wherein: The first driving mechanism (3) and the second driving mechanism (5) are provided with a threaded sleeve (31) connected with the threaded rotating shaft (22).

4. An extruder adjustable twin screw configuration according to claim 3, wherein: The main casing (1) is provided with a plurality of positioning holes (14) on both sides.

5. An extruder adjustable twin screw configuration according to claim 3, wherein: The fixed frame a (2) is provided with a first guide plate (23), and both ends of the first connecting plate (32) are provided with a first connecting port (34) movably connected with the first guide plate (23).

6. An extruder adjustable twin screw configuration according to claim 1, wherein: The connecting plate is provided with a heater (35), and the heater (35) extends to the inside of the main casing (1) through the first connecting rod (33).

7. An extruder adjustable twin screw configuration according to claim 6, wherein: The second driving mechanism (5) is provided with a second connecting plate (51), and the second connecting plate (51) is provided with a second connecting rod (52) connected with the second inner casing (12) through the positioning hole (14).

8. An extruder adjustable twin screw configuration according to claim 6, wherein: The fixed frame b (4) is provided with a second guide plate (41), and both ends of the second connecting plate (51) are provided with a second connecting port (53) movably connected with the second guide plate (41).

9. An extruder adjustable twin screw configuration according to any one of claims 1 to 8, characterised in that: The second connecting rod (52) is provided with a feeding pipe (54). The top of the main casing (1) is provided with a feeder (15).

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