Spiral conveyor for conveying master batches

Abstract

The utility model relates to the field of particle material conveying devices, in particular to a spiral conveyor for conveying master batches, which comprises a barrel, a rotating shaft provided with propeller blades and an air channel. The air channel is respectively intersected with the barrel and the rotating shaft, the air channel and the barrel form a first opening part, the air channel and the rotating shaft form a second opening part and a third opening part, the first opening part is communicated with the inner cavity of the barrel, the second opening part is respectively communicated with the inner cavity of the barrel and the inner cavity of the rotating shaft, and the third opening part is communicated with the inner cavity of the rotating shaft. When the master batch is separated from the production line and reaches the interior of the barrel, compressed air is injected through the air channel, so that dust is discharged out of the barrel from the first opening along with the compressed air, and mutual separation of the dust and the master batch is achieved; after the master batch is discharged from the cooling device and before the packaging bag is filled with the master batch, the screw conveyor for conveying the master batch can be adopted to separate the mixture of the master batch and the dust, so that the amount of the dust contained in the master batch is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the conveying device field of granular material, specifically is spiral conveyer for conveying master batch. BACKGROUND

[0002] The master batch mentioned in the paper is an additive for resin products; if the master batch and the dust generated by the broken master batch are mixed in the resin particles, the mixture of the master batch and the resin particles is uneven under the condition that the amount of dust is relatively large;

[0003] Specifically, the master batch, the dust and the resin particles form a mixture after mixing, the master batch and the resin particles have a gap between the upper part of the mixture, and the amount of dust in the gap is relatively blocked, and the gap between the master batch and the resin particles in the lower part of the mixture has a large amount of dust, so that the composition ratio of the master batch component and the resin particle component mixed in the upper part of the mixture is lower than that of the master batch component and the resin particle component mixed in the lower part of the mixture, resulting in that the material performance of the resin product formed after the mixture is heated does not meet the requirements.

[0004] The reason why a large amount of dust appears in the master batch is that, first, the master batch can generate dust during the manufacturing process, second, the master batch is manufactured after the production line, and during the conveying process of the master batch from the production line to other devices, or during the conveying process of the master batch from the first device to the second device after the master batch is separated from the production line, the master batch is extruded to cause the master batch to break and form dust; the dust caused by the two cases is filled in the packaging bag together with the complete master batch.

[0005] Therefore, after the master batch is separated from the production line, and before the master batch is filled in the packaging bag, how to reduce the amount of dust in the master batch becomes a technical problem to be solved. CONTENT OF THE UTILITY MODEL

[0006] In order to solve the technical problem of how to reduce the amount of dust in the master batch after the master batch is separated from the production line and before the master batch is filled in the packaging bag in the prior art, the utility model provides a spiral conveyor for conveying master batch.

[0007] In order to achieve the above purpose, the utility model adopts the technical scheme that:

[0008] According to one aspect of the utility model, a spiral conveyor for conveying master batch is provided, which comprises a cylinder, a rotating shaft provided with spiral blades, two movable sealing parts and an air passage;

[0009] The rotating shaft is arranged in the inner cavity of the cylinder, the rotating shaft is matched with the cylinder in the gap, and the rotating shaft is coaxially arranged with the cylinder;

[0010] The barrel is provided with an inlet and an outlet, wherein two ends of the barrel are a first end and a second end respectively, the inlet is arranged on the circumference of the barrel at the first end, the outlet is arranged on the circumference of the barrel at the second end, and the opening direction of the inlet is opposite to that of the outlet.

[0011] The gas passage intersects with the barrel and the rotating shaft respectively, wherein the gas passage forms a first port with the barrel, the gas passage forms a second port and a third port with the rotating shaft, the first port communicates with the inner cavity of the barrel, the second port communicates with the inner cavities of the barrel and the rotating shaft respectively, and the third port communicates with the inner cavity of the rotating shaft.

[0012] Further, two ends of the rotating shaft are a driving end and a driven end respectively, the driving end is located at the first end, and the driven end is located at the second end, and the end face of the first end is provided with the third port;

[0013] Further, the barrel is provided with an inlet and an outlet, wherein two ends of the barrel are a first end and a second end respectively, the inlet is arranged on the circumference of the barrel at the first end, the outlet is arranged on the circumference of the barrel at the second end, and the opening direction of the inlet is opposite to that of the outlet.

[0014] Further, the propeller blade is provided with a gas guide cavity, and the gas guide cavity communicates with the inner cavity of the rotating shaft;

[0015] The propeller blade has a first surface facing the first end and a second surface facing the second end, the second port is arranged on the first surface, and the second port communicates with the gas guide cavity.

[0016] Further, the second port is provided with a first filter screen;

[0017] The first filter screen is used to limit the master batch in the inner cavity of the barrel.

[0018] Further, the barrel is provided with an exhaust pipe;

[0019] The first port is arranged on the circumference of the barrel, and the lumen of the exhaust pipe communicates with the inner cavity of the barrel through the first port.

[0020] Further, the first port is provided with a second filter screen;

[0021] The second filter screen is used to limit the master batch in the inner cavity of the barrel.

[0022] Further, two bearings are arranged between the barrel and the rotating shaft, one of the bearings is located at the first end, and the other bearing is located at the second end.

[0023] Further, the driving end of the rotating shaft extends to the outside of the barrel;

[0024] The rotating shaft is provided with a driven gear, which is coaxially arranged with the rotating shaft and located outside the barrel;

[0025] Further, the driving mechanism comprises at least a driving gear, which is in mesh with the driven gear.

[0026] The above technical solution has the following advantages or beneficial effects:

[0027] The spiral conveyor for conveying master batches provided by the utility model can directly pass through the feeding port to enter the barrel, and the mixture of master batches and dust separated from the production line is pushed by the propeller blades to move in the conveying channel along the direction from the feeding port to the discharging port through the rotation of the rotating shaft; during the movement of the mixture of master batches and dust in the conveying channel, compressed air is injected through the air passage, the compressed air enters the inner cavity of the rotating shaft through the third port, and then moves from the inner cavity of the rotating shaft to the inner cavity of the barrel through the second port, so that the compressed air can blow the mixture of master batches and dust, and the dust is suspended in the state of compressed air after being blown, and the dust is discharged from the first port to the outside of the barrel along with the compressed air, so that the dust and the master batches are separated from each other; the master batches or the mixture of master batches and a small amount of dust discharged from the first port can be directly filled in the packaging bag or guided to the cooling device for cooling the master batches by the first port; in addition, after the master batches are discharged from the cooling device and before being filled in the packaging bag, the spiral conveyor for conveying master batches of the embodiment can also be used to separate the mixture of master batches and dust, so as to reduce the amount of dust contained in the master batches; therefore, the spiral conveyor for conveying master batches provided by the embodiment solves the technical problem of how to reduce the amount of dust in the master batches after the master batches are separated from the production line and before being filled in the packaging bag. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The structure diagram of the spiral conveyor for conveying master batches provided by the utility model embodiment is shown;

[0029] Figure 2 The structure diagram of the spiral conveyor for conveying master batches provided by the utility model embodiment is shown;

[0030] Figure 3 The structure diagram of the barrel for conveying master batches provided by the utility model embodiment is shown;

[0031] Figure 4 The partial enlarged view of the barrel for conveying the master batch is provided for the embodiment of the utility model;

[0032] Figure 5 The structure schematic view of the screw conveyor of the rotating shaft is provided for the embodiment of the utility model;

[0033] Figure 6 The structure schematic view of the screw conveyor of the rotating shaft is provided for the embodiment of the utility model. DETAILED DESCRIPTION

[0034] To solve the technical problem of how to reduce the dust amount in the master batch after the master batch is separated from the production line and before the master batch is filled in the packaging bag in the prior art, the utility model provides a screw conveyor for conveying master batch.

[0035] Embodiment 1:

[0036] Referring to Figures 1 to 6 The embodiment provides a screw conveyor for conveying master batch, which comprises a barrel 1, a rotating shaft 2 provided with a spiral blade 3, two movable sealing parts 4 and a gas path channel.

[0037] The rotating shaft 2 is arranged in the inner cavity of the barrel 1, the rotating shaft 2 is in clearance fit with the barrel 1, and the rotating shaft 2 is coaxially arranged with the barrel 1.

[0038] The barrel 1 is provided with a feeding port 101 and a discharging port 2, wherein the two ends of the barrel 1 are a first end and a second end respectively, the feeding port 101 is arranged on the circumference of the first end of the barrel 1, the discharging port 2 is arranged on the circumference of the second end of the barrel 1, and the opening direction of the feeding port 101 is opposite to the opening direction of the discharging port 2.

[0039] The gas path channel intersects with the barrel 1 and the rotating shaft 2 respectively, wherein the gas path channel forms a first port portion 103 with the barrel 1, the gas path channel forms a second port portion 201 and a third port portion 202 with the rotating shaft 2, the first port portion 103 communicates with the inner cavity of the barrel 1, the second port portion 201 respectively communicates with the inner cavities of the barrel 1 and the rotating shaft 2, and the third port portion 202 communicates with the inner cavity of the rotating shaft 2.

[0040] In the embodiment, referring to Figure 2, the transmission channel for the master batch or other particles is formed between the barrel 1, the propeller blade 3 and the rotating shaft 2, in actual use, the barrel 1 remains relatively static relative to the ground, while the rotating shaft 2 rotates coaxially relative to the barrel 1, so that the propeller blade 3 pushes the master batch or other particles to move in the direction from the feeding port 101 to the discharging port 2, and the barrel 1 is provided with two movable sealing parts 4 at the two ends respectively, at the first end of the barrel 1, the gap between the barrel 1 and the rotating shaft 2 is sealed by one of the movable sealing parts 4, and correspondingly, at the second end of the barrel 1, the gap between the barrel 1 and the rotating shaft 2 is sealed by the other movable sealing part 4, which is well known to those skilled in the art, and will not be described here.

[0041] In the embodiment, the gas passage is used to introduce compressed air, and the mixture of the master batch and the dust in the transmission channel is purged by the compressed air, so that the dust is discharged outside the barrel 1 along with the compressed air through the gas passage, thereby realizing the technical effect of reducing the amount of dust in the master batch.

[0042] Specifically, referring to Figures 1 to 4 、 Figure 6 , the gas passage forms a first port 103 with the barrel 1, and the gas passage forms a second port 201 and a third port 202 with the rotating shaft 2; in actual setting, the first scheme can be used to configure the air direction of the gas passage as the direction of the first port 103, the second port 201 to the third port 202, wherein the first port 103 is the air inlet, and the third port 202 is the air outlet; the second scheme can be used to configure the air direction of the gas passage as the direction of the third port 202, the second port 201 to the first port 103, wherein the third port 202 is the air inlet, and the first port 103 is the air outlet.

[0043] In the embodiment, the second scheme is preferably used, because in the second scheme, there is enough space between the master batch and the barrel 1, which is convenient for the compressed air and the dust to be discharged out of the barrel 1, while in the first scheme, the gap between the master batch and the rotating shaft 2 is relatively small, which may cause the compressed air to be discharged out of the barrel 1 not smoothly.

[0044] The second scheme will be described below.

[0045] Referring to Figure 2 , in the spiral conveyor in the embodiment, the two ends of the rotating shaft 2 are respectively a driving end 211 and a driven end 212, the driving end 211 is located at the first end, and the driven end 212 is located at the second end, and the third port 202 is arranged on the end face of the first end;

[0046] The air inlet pipe 5 is coaxially arranged with the rotating shaft 2 and is arranged in the third port 202, and one of the movable sealing members 4 is used to seal the gap between the air inlet pipe 5 and the third port 202.

[0047] The third port 202 is arranged at one end of the rotating shaft 2, so as to avoid the interference of the connecting structure between the air inlet pipe 5 and the rotating shaft 2 to the rotation of the rotating shaft 2.

[0048] The air inlet pipe 5 is connected to the rotating shaft 2 through one of the movable sealing members 4, the lumen of the air inlet pipe 5 is communicated with the inner cavity of the rotating shaft 2 through the third port 202, and the movable sealing member 4 is used to seal the gap between the air inlet pipe 5 and the rotating shaft 2; in actual use, the air inlet pipe 5 and the barrel 1 are kept stationary relative to the ground, and the rotating shaft 2 is kept in a rotating state relative to the air inlet pipe 5 and the barrel 1; compressed air is injected into the inner cavity of the rotating shaft 2 through the air inlet pipe 5, the compressed air flows through the third port 202 and the second port 201, and then the compressed air reaches the conveying channel for conveying the master batch from the second port 201, so that the compressed air blows the mixture of the master batch and the dust; when the mixture of the master batch and the dust is blown by the compressed air, the dust can easily separate from the master batch and flow with the compressed air due to the light mass of the dust.

[0049] Further, referring to Figure 6 The spiral conveyor of the embodiment is provided with the air guide cavity 31 which is communicated with the inner cavity of the rotating shaft 2.

[0050] The spiral blade 3 has the first surface 301 facing the first end and the second surface 302 facing the second end, the second port 201 is arranged on the first surface 301, and the second port 201 is communicated with the air guide cavity 31.

[0051] In the process of blowing the master batch and the dust by the compressed air, the second port 201 is arranged on the second surface 302, and the opening direction of the second port 201 is opposite to the movement direction of the master batch along the conveying channel, so that the blown master batch has a movement trend along the direction from the discharge port 2 to the feeding port 101, but the movement trend of the master batch is blocked by the first surface 301 of the spiral blade 3, so that the master batch is still pushed by the spiral blade 3 to move along the direction from the feeding port 101 to the discharge port 2, and from the perspective of the master batch, the movement speed of the master batch relative to the barrel 1 is not accelerated.

[0052] If the second opening 201 is arranged on the first surface 301, the opening direction of the second opening 201 is the same as the moving direction of the master batch along the conveying channel, and under the condition that the pressure of the compressed air is relatively large, it is possible that the master batch is blown by the compressed air and then the moving speed of the master batch relative to the barrel 1 is increased, which leads to the master batch being discharged from the barrel 1 too fast, and thus the efficiency of separating the dust from the master batch is reduced.

[0053] Therefore, in the embodiment, the second opening 201 is arranged on the second surface 302 of the propeller blade 3, and the efficiency of separating the dust from the master batch is improved.

[0054] Further, referring to Figure 2 or Figure 5 , the second opening 201 of the spiral conveyor in the embodiment is provided with the first filter screen 6.

[0055] The first filter screen 6 is used to limit the master batch in the inner cavity of the barrel 1.

[0056] Under the condition that the compressed air is not introduced into the air passage, as the feeding opening 101 is put with a large amount of master batch and dust, and as the rotating shaft 2 rotates, some master batch and dust reach the second opening 201, and thus some master batch and dust can enter the air guide cavity 31 of the propeller blade 3 through the second opening 201; under the condition that a large amount of master batch and dust exist in the air guide cavity 31, it is possible that a part of the air guide cavity 31 is blocked, and thus the flow efficiency of the compressed air is reduced.

[0057] In the embodiment, the first filter screen 6 is arranged on the second opening 201, wherein the mesh of the first filter screen 6 is smaller than the minimum diameter of the master batch, and the mesh of the first filter screen 6 can allow the dust to pass through; if the master batch and the dust reach the second opening 201 when the compressed air is not introduced into the air passage, the first filter screen 6 blocks the master batch outside the air guide cavity 31 of the propeller blade 3, and thus the phenomenon that the master batch enters the air guide cavity 31 is avoided; some dust can enter the inside of the air guide cavity 31 of the propeller blade 3 through the first filter screen 6, but after the compressed air is introduced into the air passage, the dust in the air guide cavity 31 is discharged to the outside of the air guide cavity 31 along with the compressed air; therefore, by arranging the first filter screen 6, the technical problem that under the condition that a large amount of master batch and dust exist in the air guide cavity 31, it is possible that a part of the air guide cavity 31 is blocked, and thus the flow efficiency of the compressed air is reduced is solved.

[0058] The mounting mode of the first filter screen 6 is preferably thread connection; specifically, the first filter screen 6 is arranged on a cylindrical component, and an external thread is arranged on the cylindrical component; correspondingly, an internal thread is arranged on the second opening 201, and the external thread of the cylindrical component is connected with the internal thread of the second opening 201.

[0059] Further, referring to Figure 2 , the spiral conveyor of the embodiment, the cylinder 1 is provided with an exhaust pipe 7;

[0060] The first port 103 is arranged on the circumference of the cylinder 1, and the lumen of the exhaust pipe 7 communicates with the inner cavity of the cylinder 1 through the first port 103.

[0061] The dust is relatively light in quality, and after being blown by the compressed air, the dust forms a suspended state suspended in the compressed air; if the dust is directly discharged into the atmosphere along with the compressed air, at least at the position of the spiral conveyor, a dust raising phenomenon will be formed; the above technical solution solves this technical problem.

[0062] The exhaust pipe 7 covers the first port 103, so that the lumen of the exhaust pipe 7 communicates with the inner cavity of the cylinder 1 through the first port 103; the dust moves from the inner cavity of the cylinder 1 to the first port 103 along with the compressed air, and then moves to the lumen of the exhaust pipe 7 through the first port 103, so that the movement direction of the dust outside the cylinder 1 is limited by the exhaust pipe 7, avoiding the formation of a dust raising phenomenon at the position of the spiral conveyor.

[0063] It should be understood that the exhaust pipe 7 should be connected to the dust removal device through a pipeline, which is a common knowledge known to those skilled in the art, and will not be repeated here.

[0064] Further, referring to Figure 3 or Figure 4 , the spiral conveyor of the embodiment, the first port 103 is provided with a second filter screen 8;

[0065] The second filter screen 8 is used to limit the master batch in the inner cavity of the cylinder 1.

[0066] In the foregoing scheme, it is possible that some master batches flow along with the compressed air after being blown by the compressed air, resulting in some master batches being discharged to the outside of the cylinder 1 through the first port 103; the above technical solution solves this technical problem in the embodiment.

[0067] The specific structure of the second filter screen is the same as that of the first filter screen 6 described above, and the connection structure of the second filter screen relative to the cylinder 1 is the same as that of the first filter screen 6 and the propeller blade 3 described above, and the rest will not be repeated here.

[0068] In the process of compressed air purging the master batch and the dust, the master batch is limited in the inner cavity of the barrel 1 by the second filter screen, while the dust is discharged to the outside of the barrel 1 along with the compressed air and penetrates the first filter screen 6; among them, even some master batch is blown by the compressed air to reach the first port 103, due to the blockage of the second filter screen, some master batch reaching the first port 103 cannot move to the outside of the barrel 1 through the second port 201.

[0069] Further, referring to Figure 2 Or Figure 5 , the spiral conveyor of the embodiment is provided with two bearings 9 between the barrel 1 and the rotating shaft 2, one of which is located at the first end, and the other is located at the second end.

[0070] The main role of the two bearings 9 is to reduce the friction between the rotating shaft 2 and the barrel 1, so as to reduce the wear of the barrel 1 or the rotating shaft 2, and achieve the purpose of prolonging the service life of the barrel 1 and the rotating shaft 2; in addition, the two bearings 9 are also used to support the rotating shaft 2, so that the axis of the rotating shaft 2 is coaxial with the axis of the barrel 1, and the face bearing 9 is inclined relative to the barrel 1, which causes the phenomenon that the master batch cannot be transported.

[0071] Further, referring to Figure 1 And Figure 2 , the spiral conveyor of the embodiment, the driving end 211 of the rotating shaft 2 extends to the outside of the barrel 1;

[0072] The rotating shaft 2 is provided with a driven gear 220, the driven gear 220 is coaxially arranged with the rotating shaft 2, and the driven gear 220 is located outside the barrel 1;

[0073] Further comprising a driving mechanism 10, the driving mechanism 10 at least comprises a driving gear 1011, the driving gear 1011 is engaged with the driven gear 220.

[0074] The driving mechanism 10 preferably adopts a motor, a speed reducer and the aforementioned driving gear 1011, wherein the motor shaft of the motor is coaxially connected with the input end of the speed reducer, and the driving gear 1011 is coaxially connected with the output end of the speed reducer;

[0075] The driving gear 1011 and the driven gear 220 on the rotating shaft 2 are engaged with each other to form a transmission connection structure; when the motor generates kinetic energy, the motor shaft rotates, and the kinetic energy of the motor is transmitted to the rotating shaft 2 through the motor shaft, the speed reducer, the driving gear 1011 and the driven gear 220 in turn, so that the rotating shaft 2 and the propeller blade 3 on the rotating shaft 2 rotate relative to the barrel 1.

[0076] The screw conveyor for conveying the master batch of the embodiment can directly pass the mixture of the master batch and the dust separated from the production line into the cylinder 1 through the feeding port 101, and the mixture is moved in the conveying channel in the direction from the feeding port 101 to the discharging port 2 by rotating the shaft 2 and the propeller blade 3 pushing the mixture. When the mixture of the master batch and the dust moves in the conveying channel, the compressed air is injected through the air passage, and the compressed air enters the inner cavity of the shaft 2 through the third port 202 and then moves from the inner cavity of the shaft 2 to the inner cavity of the cylinder 1 through the second port 201, so that the compressed air can blow the mixture of the master batch and the dust. Since the dust is light, the dust is suspended in the state of the compressed air after being blown, and the dust is discharged to the outside of the cylinder 1 with the compressed air from the first port 103, so that the dust and the master batch are separated from each other. The master batch or the mixture of the master batch and a small amount of dust discharged to the first port 103 can be directly filled in the packaging bag or guided to the cooling device for cooling the master batch by the first port 103. In addition, the mixture of the master batch and the dust can also be separated by the screw conveyor for conveying the master batch of the embodiment after the master batch is discharged from the cooling device and before being filled in the packaging bag, so that the amount of dust contained in the master batch is reduced. Therefore, the screw conveyor for conveying the master batch provided by the embodiment solves the technical problem of how to reduce the amount of dust in the master batch after the master batch is separated from the production line and before being filled in the packaging bag.

[0077] The screw conveyor for conveying the master batch of the embodiment is provided with the first filter screen 6 at the second port 201 of the propeller blade 3 and the second filter screen at the first port 103 of the cylinder 1. The two filter screens limit the master batch in the inner cavity of the cylinder 1, so that the master batch cannot enter the air guide cavity 31 of the propeller blade 3 through the second port 201, and the master batch cannot be discharged to the outside of the cylinder 1 through the first port 103.

[0078] The screw conveyor for conveying the master batch of the embodiment is provided with the exhaust pipe 7 outside the cylinder 1. On the one hand, the exhaust pipe 7 is used to limit the flow direction of the dust and the compressed air discharged to the outside of the cylinder 1, so as to avoid the dust raising phenomenon at the position of the screw conveyor. On the other hand, the exhaust pipe 7 can be connected to the dust collector through the pipeline, and the dust collector is used to collect the dust, so as to reduce the occurrence of the dust raising phenomenon.

[0079] The above only describes the preferred embodiments of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation or direct or indirect application in other related technical fields based on the content of the utility model specification and drawings is also included in the patent protection range of the utility model.

Claims

1. A screw conveyor for conveying master granules, characterized in that, The cylinder, the rotating shaft provided with propeller blades, two movable sealing components and a gas passage are included. The rotating shaft is arranged in the inner cavity of the cylinder, the rotating shaft and the cylinder form a clearance fit, and the rotating shaft and the cylinder are coaxially arranged. The cylinder is provided with a feeding port and a discharging port, wherein the two ends of the cylinder are a first end and a second end respectively, the feeding port is arranged on the circumference of the cylinder at the first end, the discharging port is arranged on the circumference of the cylinder at the second end, the opening direction of the feeding port and the opening direction of the discharging port are opposite. The gas passage intersects with the cylinder and the rotating shaft respectively, wherein the gas passage forms a first port with the cylinder, the gas passage forms a second port and a third port with the rotating shaft, the first port communicates with the inner cavity of the cylinder, the second port communicates with the inner cavities of the cylinder and the rotating shaft respectively, and the third port communicates with the inner cavity of the rotating shaft.

2. A screw conveyor according to claim 1, characterised in that The two ends of the rotating shaft are a driving end and a driven end respectively, the driving end is located at the first end, the driven end is located at the second end, and the end face of the first end is provided with the third port. It also includes an air inlet pipe, the air inlet pipe and the rotating shaft are coaxially arranged, the air inlet pipe is arranged in the third port, and one of the movable sealing components is used to seal the gap between the air inlet pipe and the third port.

3. A screw conveyor according to claim 2, characterised in that The propeller blade is provided with a gas guide cavity, and the gas guide cavity communicates with the inner cavity of the rotating shaft. The propeller blade has a first surface facing the first end and a second surface facing the second end, the second port is arranged on the first surface, and the second port communicates with the gas guide cavity.

4. A screw conveyor according to claim 3, characterised in that The second port is provided with a first filter screen; The first filter screen is used to limit the master batch in the inner cavity of the cylinder.

5. A screw conveyor according to claim 4, characterised in that An exhaust pipe is arranged on the cylinder; The first port is arranged on the circumference of the cylinder, and the lumen of the exhaust pipe communicates with the inner cavity of the cylinder through the first port.

6. A screw conveyor according to claim 5, characterised in that The first port is provided with a second filter screen; The second filter screen is used to limit the master batch in the inner cavity of the cylinder.

7. A screw conveyor according to any one of claims 1 to 6, characterised in that Two bearings are arranged between the cylinder and the rotating shaft, one of the bearings is located at the first end, and the other bearing is located at the second end.

8. A screw conveyor according to claim 7, characterised in that The driving end of the rotating shaft extends to the outside of the cylinder. A driven gear is arranged on the rotating shaft, the driven gear is coaxially arranged with the rotating shaft, and the driven gear is located outside the cylinder. It also includes a driving mechanism, the driving mechanism at least includes a driving gear, and the driving gear and the driven gear are meshed with each other.

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