CN111070630B

CN111070630B - Double-screw stroke-increasing extrusion structure

Info

Publication number: CN111070630B
Application number: CN201911404903.5A
Authority: CN
Inventors: 董大伟; 江宽; 武晋巍; 许红卫
Original assignee: Beijng Environmental Protection Technology Co ltd Wing Tai Luther
Current assignee: Beijng Environmental Protection Technology Co ltd Wing Tai Luther
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2022-03-22
Anticipated expiration: 2039-12-30
Also published as: CN111070630A

Abstract

The invention belongs to the technical field of extruders, and particularly relates to a double-screw range-extending extrusion structure which comprises a machine barrel, a feed hopper, a first screw, a second screw, a controller, a driving unit and a linkage unit, wherein the machine barrel is provided with a discharge hole, a first feed inlet and a second feed inlet; a circulating channel is arranged on the machine barrel, a circulating outlet and a circulating inlet which is on the same side with the first feed inlet are formed in the machine barrel, one end of the circulating channel is communicated with the circulating inlet, and the other end of the circulating channel is communicated with the circulating outlet; the first material door is connected to the first feeding hole in a sliding mode, the second material door is connected to the circulating inlet in a sliding mode, and the third material door is connected to the discharging hole in a sliding mode; the controller is electrically connected with the driving unit. In this scheme, the material is once discharged again at the barrel inner loop, has effectively prolonged the dwell time of material in the barrel, makes the material fully extruded, improves the closely knit degree of material.

Description

Double-screw stroke-increasing extrusion structure

Technical Field

The invention belongs to the technical field of extruders, and particularly relates to a double-screw stroke-increasing extrusion structure.

Background

The quantity of waste tires produced in China every year is huge, and in order to fully utilize the resources, the recycling of the waste tires is particularly important. The waste tires are usually prepared into rubber powder after being recovered, the rubber powder, the regenerant and other materials are uniformly mixed, and the uniformly mixed materials are extruded and processed by a double-screw extruder. The double-screw extruder is developed on the basis of a single-screw extruder, and has the characteristics of good feeding performance, mixing and plasticizing performance, exhaust performance, extrusion stability and the like. The twin-screw extruder consists of several parts, such as a transmission device, a feeding device, a cylinder and a screw, wherein the screw is an important component in the twin-screw extruder. In the existing double-screw extruder, double screws are meshed with each other and rotate in the same direction or in the reverse direction, materials are directly conveyed to a discharge port, in the process, the stroke of the materials is short, sufficient extrusion cannot be achieved, and the problem of insufficient compactness exists easily.

Disclosure of Invention

The invention aims to provide a double-screw stroke-increasing extrusion structure to solve the problems that materials cannot be sufficiently extruded and the compactness is insufficient easily.

In order to achieve the purpose, the scheme of the invention is as follows: the double-screw range-increasing extrusion structure comprises a machine barrel, a feed hopper, a first screw and a second screw which are connected in the machine barrel in a rotating mode, a discharge port, a first feed port and a second feed port are formed in the machine barrel, the lower end of the feed hopper is communicated with the first feed port, the double-screw range-increasing extrusion structure further comprises a controller, a driving unit and a linkage unit, the linkage unit comprises a first material door, a second material door, a third material door and a linkage mechanism, and the linkage mechanism drives the first material door, the second material door and the third material door to move synchronously; a circulating channel is arranged on the machine barrel, a circulating outlet and a circulating inlet which is on the same side with the first feed inlet are formed in the machine barrel, one end of the circulating channel is communicated with the circulating inlet, and the other end of the circulating channel is communicated with the circulating outlet; the first material door is connected to the first feeding hole in a sliding mode, the second material door is connected to the circulating inlet in a sliding mode, and the third material door is connected to the discharging hole in a sliding mode; the controller is electrically connected with the driving unit, the controller controls the driving unit to drive the first bin gate, the second bin gate and the third bin gate to act through the linkage mechanism, so that the first feeding hole and the discharging hole are closed in a fixed time period, the circulating inlet is opened, the first feeding hole and the discharging hole are opened in another fixed time period, the circulating inlet is closed, and the operation is repeated in the same way.

The working principle of the scheme is as follows:

when materials such as rubber powder and the like need to be extruded and processed, the first screw and the second screw are rotated, the materials such as the rubber powder and the like are added into the machine barrel through the second feeding hole, and the materials move to one side of the discharging hole and the circulating inlet under the action of the first screw and the second screw. After the machine barrel is filled with materials, feeding through the second feeding hole is stopped, meanwhile, a power supply of the controller is connected, the controller controls the driving unit to drive the first material door, the second material door and the third material door to move through the linkage mechanism, the first feeding hole and the discharging hole are closed in a fixed time period (hereinafter referred to as a time period A), the circulating inlet is opened, the first feeding hole and the discharging hole are opened in another fixed time period (hereinafter referred to as a time period B), the circulating inlet is closed, and the process is circulated. By designing in advance, the time period A is the time when the material in the cylinder completes one cycle in the cylinder and the circulation channel, and the time period B is the time when the material falls from the first feeding hole and then moves to the side of the discharging hole of the cylinder. In the period A, materials in the machine barrel enter the circulating channel through the circulating inlet, then enter the machine barrel again through the circulating outlet, are extruded and conveyed forwards by the first screw and the second screw, and complete one cycle. After the period A, in the period B, the materials which are circulated once in the machine barrel are discharged from the discharge port, meanwhile, the materials to be processed (hereinafter called new materials) in the feed hopper enter the machine barrel through the first feed port, when the new materials occupy the whole machine barrel, the period B is ended, the period A is entered again, and the circulation is carried out.

The beneficial effect of this scheme lies in: in this scheme, through setting up structures such as controller, drive unit and linkage unit for the material can be once discharged again in the barrel internal circulation motion, and the non-is directly extruded forward, then discharges, has effectively prolonged the dwell time of material in the barrel, makes the material can be by abundant extrusion, improves the closely knit degree of material.

Optionally, the linkage mechanism comprises a communication column, the first bin gate is slidably connected to one side of the communication column, and the second bin gate is slidably connected to the other side of the communication column; a pull wire capable of enabling the third bin gate to slide is connected between the third bin gate and the second bin gate, a reset piece is connected between the third bin gate and the machine barrel, and the reset piece applies an acting force opposite to the pull wire to the third bin gate; the driving unit drives the first bin gate or the second bin gate to move.

The specific operation principle is the same whether the driving unit drives the first material gate to move or drives the second material gate to move, and the driving unit is used to drive the first material gate to move as an example. The controller controls the driving unit to work, the driving unit drives the first bin gate to move firstly, so that the first bin gate seals the first feeding hole, the second bin gate moves in the moving process of the first bin gate due to the fact that the first bin gate is communicated with the second bin gate through the communicating column, and the second bin gate is far away from the circulating inlet, so that the circulating inlet is opened; the third bin gate is driven to move together through the stay wire in the moving process of the second bin gate, the third bin gate moves towards one side of the discharge hole, and the third bin gate blocks the discharge hole. After the time period A, the controller controls the driving unit to work again, the driving unit drives the first bin gate to reset, the second bin gate restores to the original position, the first feeding hole is opened at the moment, and the circulating inlet is closed. After the second bin gate resets, acting as go-between second bin gate and the third bin gate loosens, and under the effect that resets, the third bin gate also resets, and at this moment, the discharge gate is opened.

Optionally, the driving unit is a hydraulic cylinder, and a piston rod of the hydraulic cylinder is connected to the first material gate. The hydraulic cylinder is simple to operate, is easy to control work by the controller, and is suitable for being used as a driving unit.

Optionally, an adjusting roller for adjusting the position of the pull wire is arranged on the machine barrel. The adjusting roller can effectively change the direction of the acting force of the pull wire on the third material gate, and is beneficial to controlling the movement of the third material gate.

Optionally, the return member is a spring.

Optionally, the linkage mechanism includes a first connecting column and a second connecting column, the first gate is slidably connected to one side of the first connecting column, the second gate is slidably connected to the other side of the first connecting column, the second gate is also slidably connected to one side of the second connecting column, and the third gate is slidably connected to the other side of the second connecting column; the second material door can block the circulating inlet and is also provided with an outlet which can be opposite to the circulating inlet; the driving unit drives the first bin gate or the second bin gate or the third bin gate to move.

The specific operation principle is the same no matter whether the driving unit drives the first bin gate, the second bin gate or the third bin gate to move, and the following description will take the driving unit driving the first bin gate to move as an example. The controller controls the driving unit to work, the driving unit drives the first bin gate to move firstly, the first feed port is plugged by the first bin gate, the second bin gate also moves in the moving process of the first bin gate due to the fact that the first bin gate and the second bin gate are communicated through the first communicating column, and the outlet on the second bin gate is opposite to the circulating inlet, so that the circulating inlet is opened. Because the second bin gate is also connected with the third bin gate through the second communicating column, the second bin gate drives the third bin gate to move together in the moving process, the third bin gate moves towards one side of the discharge hole, and the third bin gate blocks the discharge hole. After the time period A, the controller controls the driving unit to work again, the driving unit drives the first bin gate to reset, the second bin gate restores to the original position, the first feeding hole is opened at the moment, and the circulating inlet is closed by the second bin gate. After the second bin gate resets, the third bin gate also resets, and the discharge gate is kept away from to the third bin gate, and the discharge gate is opened.

Optionally, the driving unit is an air cylinder, and a piston rod of the air cylinder is connected to the first material gate. The cylinder is simple to operate, is easy to control to work by the controller, and is suitable for being used as a driving unit.

Optionally, the rotation directions of the first screw and the second screw are opposite, the first screw is provided with a forward helical blade a and a reverse helical blade a, the diameter of the reverse helical blade a is smaller than that of the forward helical blade a, the second screw is provided with a reverse helical blade b, and the forward helical blade a and the reverse helical blade a on the first screw and the reverse helical blade b on the second screw are arranged at intervals.

First screw rod, when the second screw rod rotates, forward helical blade a and reverse helical blade b promote the material forward movement in the barrel, and reverse helical blade a promotes the material reverse movement in the barrel, because reverse helical blade a's diameter is less than forward helical blade a's diameter, consequently, reverse helical blade a is less than forward helical blade a to the effort that the material was applyed to the effort that reverse helical blade a was applyed, consequently, the material in the barrel is forward movement on the whole, and at the forward movement in-process, the material receives the ascending extrusion force of axial, the closely knit degree increase of material, thereby closely knit degree after the material ejection of compact has been improved. Meanwhile, due to the material returning, the residence time of the material in the machine barrel is prolonged, so that the material is fully mixed and reacted in the machine barrel.

Optionally, the second screw is provided with a forward helical blade b, and the diameter of the forward helical blade b is smaller than that of the reverse helical blade b. In the process of forward movement of the material, the forward helical blade b pushes the material to move reversely (return), so that the material is subjected to axial extrusion force, and the compactness of the material can be further improved.

Optionally, the forward helical blades b are arranged opposite to the reverse helical blades a and form reverse groups, and the reverse groups have at least two groups. And a reverse group is additionally arranged, so that the compactness of the material is further improved.

Drawings

FIG. 1 is a front view of a twin screw extended stroke extrusion configuration in accordance with a first embodiment of the present invention;

FIG. 2 is a top view of a twin screw extended range extrusion configuration in accordance with an embodiment of the present invention;

FIG. 3 is a right side view of a twin screw extended stroke extrusion configuration in accordance with a first embodiment of the present invention;

FIG. 4 is a schematic structural view of a first screw and a second screw according to a first embodiment of the present invention;

FIG. 5 is a front view of a twin screw extended stroke extrusion configuration in accordance with a first embodiment of the present invention;

FIG. 6 is a top view of a twin screw extended range extrusion configuration in accordance with an embodiment of the present invention;

FIG. 7 is a right side view of a twin screw extended range extrusion configuration in accordance with a first embodiment of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a cylinder 10, a feed hopper 11, a discharge port 12, a first screw 13, a second screw 14, a forward helical blade a131, a reverse helical blade a132, a reverse helical blade b141, a forward helical blade b142, a circulating channel 20, a second gate 21, an outlet 211, a communicating column 30, an adjusting roller 31, a pull wire 32, a hydraulic cylinder 40, a third gate 50, a bracket 60, a spring 61, an air cylinder 70, a first communicating column 80 and a second communicating column 90.

Example one

The embodiment is basically as shown in fig. 1 and fig. 2: the double-screw range-increasing extrusion structure comprises a controller, a driving unit, a linkage unit, a machine barrel 10, a feed hopper 11 and a first screw 13 and a second screw 14 which are connected in the machine barrel 10 in a rotating mode. Referring to fig. 4, the first screw 13 and the second screw 14 rotate in opposite directions, the first screw 13 is welded with a forward spiral blade a131 and a reverse spiral blade a132, the diameter of the reverse spiral blade a132 is smaller than that of the forward spiral blade a131, and the length of the reverse spiral blade a132 is shorter than that of the forward spiral blade a 131. A reverse helical blade b141 and a forward helical blade b142 are welded on the second screw 14, and the diameter of the forward helical blade b142 is smaller than that of the reverse helical blade b 141. The forward spiral blades a131 and the reverse spiral blades a132 of the first screw 13 are spaced apart from each other, and the forward spiral blades a131 are disposed opposite to the reverse spiral blades b 141. The forward helical blades b142 are disposed opposite the reverse helical blades a132 and form reverse groups, at least two of which are provided in this embodiment.

The barrel 10 is provided with a discharge port 12, a first feed port and a second feed port, in this embodiment, the first feed port and the second feed port are located at the upper left of the barrel 10, and the discharge port 12 is located at the lower right of the barrel 10. The feed hopper 11 is welded to the barrel 10, and the lower end of the feed hopper 11 is communicated with the first feed port. The machine barrel 10 is welded with a circulation channel 20, the machine barrel 10 is provided with a circulation outlet 211 and a circulation inlet, the circulation outlet 211 is positioned on the left side of the machine barrel 10, the circulation inlet is positioned on the right side of the machine barrel 10, the right end of the circulation channel 20 is communicated with the circulation inlet, and the left end of the circulation channel 20 is communicated with the circulation outlet 211.

The linkage unit comprises a first material door, a second material door 21, a third material door 50 and a linkage mechanism, and the linkage mechanism drives the first material door, the second material door 21 and the third material door 50 to move synchronously. The first material door is connected to the first feeding hole in a sliding mode and can seal the first feeding hole; the second material door 21 is connected to the circulating inlet in a sliding mode, and the second material door 21 can block the second feeding hole; third bin gate 50 is sliding connection on discharge gate 12, and third bin gate 50 can be with discharge gate 12 shutoff. Referring to fig. 3, the linkage mechanism includes a communication column 30, the communication column 30 is fixed on the machine barrel 10 through a mounting frame, the first gate is slidably and hermetically connected to the left side of the communication column 30, and the second gate 21 is slidably and hermetically connected to the right side of the communication column 30. A pull wire 32 is connected between the third material gate 50 and the second material gate 21, and the pull wire 32 can enable the third material gate 50 to slide. The cylinder 10 is provided with an adjusting roller 31, and the adjusting roller 31 can adjust the position of the stay wire 32, so that the stay wire 32 can better act on the third material gate 50. A return element is connected between the third hopper 50 and the barrel 10, the return element is a spring 61, one end of the spring 61 is directly connected to the third hopper 50, and the other end is connected to the barrel 10 through a bracket 60. The spring 61 exerts a force on the third gate 50 opposite to that exerted by the wire 32.

The driving unit is a hydraulic cylinder 40, and the hydraulic cylinder 40 is fixedly arranged on the machine frame and can also be arranged on the machine barrel 10 through a mounting frame. The piston rod of hydraulic cylinder 40 is fixedly connected to the first material gate, and hydraulic cylinder 40 can drive the first material gate to move.

The controller is electrically connected to the hydraulic cylinder 40, and in this embodiment, the controller used is a loose controller model FP-XC 14. The controller controls the hydraulic cylinder 40 to drive the first bin gate, the second bin gate 21 and the third bin gate 50 to act through the linkage mechanism, so that in a fixed time period (hereinafter referred to as a time period A), the first feeding hole and the first discharging hole 12 are closed, the circulating inlet is opened, in another fixed time period (hereinafter referred to as a time period B), the first feeding hole and the first discharging hole 12 are opened, the circulating inlet is closed, and the process is repeated. By designing in advance, the time period A is the time when the material in the cylinder 10 completes exactly one cycle in the cylinder 10 and the circulation channel 20, and the time period B is the time when the material falls from the first feeding hole and then moves to the side of the discharge hole 12 of the cylinder 10.

When materials such as rubber powder and the like need to be extruded, the first screw 13 and the second screw 14 are rotated, the materials such as rubber powder and the like are added into the cylinder 10 through the second feed inlet, the forward helical blade a131 and the reverse helical blade b141 push the materials in the cylinder 10 to move in a forward direction, the reverse helical blade a132 and the forward helical blade b142 push the materials in the cylinder 10 to move in a reverse direction, because the diameter of the reverse helical blade a132 is smaller than that of the forward helical blade a131, and the diameter of the forward helical blade b142 is smaller than that of the reverse helical blade b141, the acting force exerted by the reverse helical blade a132 on the materials is smaller than that exerted by the forward helical blade a131 on the materials, and the acting force exerted by the forward helical blade b142 on the materials is smaller than that exerted by the reverse helical blade b141, so that the materials in the cylinder 10 move in a forward direction as a whole, and the materials are subjected to axial extrusion force during the forward movement, the compactness of the material is increased, so that the compactness of the discharged material is improved.

Under the action of the first screw 13 and the second screw 14, the materials move to the discharge port 12 and one side of the circulating inlet. After the machine barrel 10 is filled with materials, feeding through the second feeding hole is stopped, meanwhile, a power supply of the controller is connected, the controller controls the hydraulic cylinder 40 to work, a piston cylinder of the hydraulic cylinder 40 drives the first material door to move, so that the first material door seals the first feeding hole, and as the first material door is communicated with the second material door 21 through the communication column 30, the second material door 21 also moves in the moving process of the first material door, and the second material door 21 is far away from the circulation inlet, so that the circulation inlet is opened; in the moving process of the second bin gate 21, the pull wire 32 drives the third bin gate 50 to move together, the third bin gate 50 moves towards one side of the discharge hole 12, and the discharge hole 12 is blocked by the third bin gate 50. During the period A, the material in the cylinder 10 enters the circulation channel 20 through the circulation inlet, and then enters the cylinder 10 again through the circulation outlet 211, and is extruded and conveyed by the first screw 13 and the second screw 14, and a circulation is completed. After the time period A, the controller controls the hydraulic cylinder 40 to work again, the piston rod of the hydraulic cylinder 40 drives the first bin gate to reset, the second bin gate 21 restores to the original position, the first feeding hole is opened at the moment, and the circulating inlet is closed. After the second bin gate 21 is reset, the pull wire 32 between the second bin gate 21 and the third bin gate 50 is loosened, and under the action of the reset piece, the third bin gate 50 is also reset, and at the moment, the discharge port 12 is opened. In the time period B, the material in the cylinder 10 after one circulation is discharged from the discharge port 12, meanwhile, the material to be processed (hereinafter referred to as new material) in the feed hopper 11 enters the cylinder 10 through the first feed port, when the new material occupies the whole cylinder 10, the time period B is ended, the time period A is entered again, and the circulation is carried out.

Example two

The present embodiment is different from the first embodiment in that: the linkage mechanism and the driving unit of the present embodiment are different from those of embodiment 1. Referring to fig. 5, 6 and 7, the linkage mechanism of the present embodiment includes a first communicating cylinder 80 and a second communicating cylinder 90, and hydraulic oil is filled in both the first communicating cylinder 80 and the second communicating cylinder 90. The first communicating column 80 and the second communicating column 90 are both fixed on the machine barrel 10 through a mounting frame, the first communicating column 80 is horizontally arranged and located above the machine barrel 10, the left side of the first communicating column 80 is located at a first feeding port, and the right side of the first communicating column 80 is located at a circulating inlet; the second communicating column 90 is vertically disposed and located at one side of the cylinder 10, the upper side of the second communication being located at the circulation inlet, and the lower side of the second communication being located at the discharge port 12. First bin gate slip and sealing connection are in the left side of first intercommunication post 80, and second bin gate 21 slip and sealing connection are in the right side of first intercommunication post 80, and second bin gate 21 also slides simultaneously and sealing connection is in the upside of second intercommunication post 90, and third bin gate 50 slides and sealing connection is in the downside of second intercommunication post 90. The second material gate 21 can block the circulation inlet, and the second material gate 21 is also provided with an outlet 211 opposite to the circulation inlet. The driving unit is a cylinder 70, and the cylinder 70 is fixedly mounted on the machine frame and also can be mounted on the machine barrel 10 through a mounting frame. The piston rod of the air cylinder 70 is connected to the first material gate, and the air cylinder 70 drives the first material gate to move.

The controller controls the cylinder 70 to work, the cylinder 70 drives the first material door to move towards one side of the first material inlet, and the first material door seals the first material inlet. Because the first material gate is communicated with the second material gate 21 through the first communicating column 80, the second material gate 21 also moves in the moving process of the first material gate, and the outlet 211 on the second material gate 21 is opposite to the circulating inlet, so that the circulating inlet is opened. Because the second material door 21 and the third material door 50 are also connected through the second communication column 90, the second material door 21 drives the third material door 50 to move together in the moving process, the third material door 50 moves towards one side of the discharge hole 12, and the third material door 50 blocks the discharge hole 12. After the time period A, the controller controls the air cylinder 70 to work again, the air cylinder 70 drives the first material door to reset, the second material door 21 restores to the original position, at the moment, the first material inlet is opened, and the circulating inlet is closed by the second material door 21. After the second material door 21 is reset, the third material door 50 is also reset, the third material door 50 is far away from the discharge port 12, and the discharge port 12 is opened.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the present invention.

Claims

1. Twin-screw increases journey extrusion structure, including barrel, feeder hopper and all rotate first screw rod and the second screw rod of connection in the barrel, it has discharge gate, first feed inlet and second feed inlet to open on the barrel, the lower extreme and the first feed inlet intercommunication of feeder hopper, its characterized in that: the automatic feeding device comprises a controller, a driving unit and a linkage unit, wherein the linkage unit comprises a first material door, a second material door, a third material door and a linkage mechanism, and the linkage mechanism drives the first material door, the second material door and the third material door to synchronously move; a circulating channel is arranged on the machine barrel, a circulating outlet and a circulating inlet which is on the same side with the first feed inlet are formed in the machine barrel, the circulating outlet is located on the left side of the machine barrel, the circulating inlet is located on the right side of the machine barrel, one end of the circulating channel is communicated with the circulating inlet, and the other end of the circulating channel is communicated with the circulating outlet; the first material door is connected to the first feeding hole in a sliding mode, the second material door is connected to the circulating inlet in a sliding mode, and the third material door is connected to the discharging hole in a sliding mode; the controller is electrically connected with the driving unit, the controller controls the driving unit to drive the first bin gate, the second bin gate and the third bin gate to act through the linkage mechanism, so that the first feeding hole and the discharging hole are closed and the circulating inlet is opened in a fixed time period, the first feeding hole and the discharging hole are opened and the circulating inlet is closed in another fixed time period, and the operation is repeated; the rotating directions of the first screw and the second screw are opposite, the first screw is provided with a forward helical blade a and a reverse helical blade a, the diameter of the reverse helical blade a is smaller than that of the forward helical blade a, the second screw is provided with a reverse helical blade b, and the forward helical blade a and the reverse helical blade a on the first screw and the reverse helical blade b on the second screw are arranged at intervals.

2. The twin screw extended length extrusion structure of claim 1, wherein: the linkage mechanism comprises a communication column, a first bin gate is connected to one side of the communication column in a sliding mode, and a second bin gate is connected to the other side of the communication column in a sliding mode; a pull wire capable of enabling the third bin gate to slide is connected between the third bin gate and the second bin gate, a reset piece is connected between the third bin gate and the machine barrel, and the reset piece applies an acting force opposite to the pull wire to the third bin gate; the driving unit drives the first bin gate or the second bin gate to move.

3. The twin screw extended length extrusion structure of claim 2, wherein: the drive unit is a hydraulic cylinder, and a piston rod of the hydraulic cylinder is connected to the first charging door.

4. The twin screw extended range extrusion structure of claim 3, wherein: and an adjusting roller for adjusting the position of the stay wire is arranged on the machine barrel.

5. The twin screw extended range extrusion structure of claim 4, wherein: the reset piece is a spring.

6. The twin screw extended length extrusion structure of claim 1, wherein: the linkage mechanism comprises a first communication column and a second communication column, a first bin gate is connected to one side of the first communication column in a sliding mode, a second bin gate is connected to the other side of the first communication column in a sliding mode, the second bin gate is also connected to one side of the second communication column in a sliding mode, and a third bin gate is connected to the other side of the second communication column in a sliding mode; the second material door can block the circulating inlet and is also provided with an outlet which can be opposite to the circulating inlet; the driving unit drives the first bin gate or the second bin gate or the third bin gate to move.

7. The twin screw extended range extrusion structure of claim 6, wherein: the drive unit is a cylinder, and a piston rod of the cylinder is connected to the first charging door.

8. The twin screw extended length extrusion structure of any one of claims 1 to 7, wherein: and a forward helical blade b is arranged on the second screw, and the diameter of the forward helical blade b is smaller than that of the reverse helical blade b.

9. The twin screw extended range extrusion structure of claim 8, wherein: the forward helical blades b and the reverse helical blades a are arranged oppositely to form reverse groups, and at least two reverse groups are formed.