A suspension type in-stream inoculator for casting and pouring

Abstract

The present invention discloses a suspended in-stream inoculator for casting pouring, which relates to the field of casting and includes a hanging rack, a ladle and a connecting shaft. The ladle is arranged inside the hanging rack, and connecting shafts are symmetrically fixed on the front and rear sides of the ladle. A rotational connection is formed between the connecting shafts and the hanging rack. Above the pouring spout of the ladle, there is a material bucket for storing inoculant, and rotating shafts are symmetrically fixed on the front and rear sides of the material bucket. The end of the rotating shaft is rotationally connected to a support seat, and the support seat is fixed on the outside of the ladle and moves synchronously with the ladle. Above the material bucket, there is a vertical positioning mechanism to control the material bucket to maintain a vertical state when the ladle rotates. This suspended in-stream inoculator for casting pouring controls the material opening through a baffle. During pouring, the baffle automatically moves to open the material opening to achieve automatic addition of inoculant. After pouring stops, the baffle resets to block the through opening, eliminating the need for manual control again, making use and operation more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of casting, and specifically relates to a hanging in-stream inoculation machine for casting pouring. Background Art

[0002] During the casting pouring process, inoculants can be added to the casting materials to change the material properties. When the inoculants are directly mixed with the pouring liquid, unevenness is likely to occur. Therefore, they can be added during pouring.

[0003] Prior art 1 (a Chinese patent with publication number CN112045153A, published on December 8, 2020) is an intelligent in-stream inoculation device and an in-stream inoculation method. The in-stream inoculation device includes a ladle, a support frame, an inoculation funnel, a push rod device, a storage battery, a Bluetooth module, a low battery alarm, and a smart phone. The support frame is fixed on the steel pipe socket on the side of the ladle nozzle. The inoculation funnel is installed at the end of the support frame. The bottom of the inoculation funnel is provided with a downward opening, which is directly above the ladle nozzle. A gate valve is connected to the opening, and the gate valve is controlled to open and close by the push rod device. When the ladle rotates and tilts to pour molten iron under the drive of the rotating device, the inoculation funnel is always perpendicular above the nozzle. Press the in-stream inoculation button on the smart phone APP to perform in-stream inoculation. The device of the present invention has strong safety and practicability, and a high degree of intelligence. It can realize accurate automatic in-stream inoculation throughout the pouring process of the ladle, and has functions of alarm for depletion of inoculant and low battery alarm for the storage battery. Prior art 2 (a Chinese patent with publication number CN106903298B, published on August 6, 2019) is an in-stream inoculation ladle device and an in-stream inoculation method. The in-stream inoculation ladle device includes a ladle. The upper mouth of the ladle is provided with a nozzle. The ladle is laterally provided with a turntable drive device for driving the ladle to rotate so as to pour the pouring liquid from the nozzle. It is characterized in that an inoculation funnel is hung above the nozzle. A suspension ring is provided in the direction of the gravity extension line of the upper part of the inoculation funnel. The lower part of the inoculation funnel is provided with an outlet pipe, and a switchable valve plate is arranged in the outlet pipe. The inoculation funnel is hung on a balance support. Support frames are respectively fixed on the outer walls of the ladle on both sides of the nozzle. A horizontal support shaft is arranged on the support frames. The balance support is vertically supported on the support shaft. When the ladle rotates and tilts to pour the pouring liquid under the drive of the rotating device, the inoculation funnel is always vertically hung above the nozzle, and the valve plate can be opened at any time for in-stream inoculation. The device of the present invention can achieve uniform in-stream inoculation during ladle pouring.

[0004] Although the current in-stream inoculation machine can achieve the addition of inoculant during pouring, manual operation and control are required for adding the inoculant. After pouring, it is necessary to control its closing again. Failure to open the feeding channel in time during pouring will cause a decline in the quality of subsequent products, and failure to close the feeding channel in time after pouring will also cause waste of inoculant, reducing the convenience of using the device. Summary of the Invention

[0005] The purpose of the present invention is to provide a hanging in-stream inoculation machine for casting pouring, so as to solve the problems in the above-mentioned background technology that manual operation and control are required for adding the inoculant, and it is necessary to control its closing again after pouring, which is likely to cause untimely addition of inoculant, affecting product quality or causing waste of inoculant.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A hanging in-stream inoculation machine for casting pouring, including a hanging rack, a ladle and a connecting shaft. The ladle is arranged inside the hanging rack, and connecting shafts are symmetrically fixed on the front and rear sides of the ladle. A rotational connection is formed between the connecting shaft and the hanging rack. Above the pouring spout of the ladle, there is a material bucket for storing inoculant. Rotating shafts are symmetrically fixed on the front and rear sides of the material bucket, and the end of the rotating shaft is rotationally connected to a support seat. The support seat is fixed on the outside of the ladle and moves synchronously with the ladle. Above the material bucket, there is a vertical positioning mechanism for controlling the material bucket to maintain a vertical state when the ladle rotates. Inside the material bucket, there is a through port for discharging materials, and a feeding pipe is connected to the outside of the through port. The left end of the feeding pipe is located outside the material bucket to discharge the inoculant. A baffle is arranged outside the through port to block the through port, and a material port is arranged below the baffle. A vertical sliding structure is formed between the baffle and the material bucket. By sliding the baffle upwards, the through port and the material port are opposed to each other, opening the through port. A driving plate is fixed below the baffle, and a movement control mechanism is arranged outside the driving plate to automatically control the movement of the baffle during pouring.

[0007] Further optimizing the technical solution, the vertical positioning mechanism includes a guiding rod, a fixed block and a slider;

[0008] The guiding rod is installed above the material bucket;

[0009] The fixed block is fixed on the left side of the hanging rack;

[0010] The slider is arranged inside the fixed block and forms a left-right sliding structure with the fixed block. The upper end of the guiding rod passes through the slider and forms an up-down sliding structure with the slider. And balls are arranged on the surface of the slider.

[0011] Further optimizing the technical solution, a cover body is arranged above the material bucket, and a threaded connection is formed between the cover body and the material bucket. And the cover body is fixedly connected to the lower end of the guiding rod.

[0012] Further optimizing the technical solution, the movement control mechanism includes a first gear, a mounting shaft and an automatic trigger mechanism;

[0013] A first gear is disposed on the right side of the driving plate and is engaged with the driving plate;

[0014] An installation shaft is fixed to the middle of the first gear, and a rotation connection is formed between the installation shaft and the barrel;

[0015] The automatic trigger mechanism is connected to the installation shaft to control the rotation of the installation shaft.

[0016] Further optimizing the technical solution, the automatic triggering mechanism includes a push plate, a movable plate and a second gear;

[0017] The push plate is arranged below the barrel and has an arc-shaped structure;

[0018] The movable plate is fixed above the push plate, and the upper end of the movable plate is located between the bottom of the barrel and the barrel to form a left-right sliding structure;

[0019] The second gear is arranged above the movable plate and is meshed with the movable plate, and the second gear is fixedly connected to the mounting shaft.

[0020] To further optimize this technical solution, a torsion spring is provided at the end of the installation shaft to provide a rotational reset force for the installation shaft so that the baffle can fall automatically.

[0021] To further optimize this technical solution, a connecting hose is connected to the outside of the through port, the connecting hose is connected to the discharge pipe, support shafts are fixed to the upper and lower ends of the discharge pipe, a rotating connection is formed between the support shaft and the barrel, and a reciprocating control mechanism is provided on the outside of the support shaft.

[0022] Further optimizing the technical solution, the reciprocating control mechanism includes a third gear, a connecting plate, a return spring, an extrusion wheel, a drive shaft and a motor;

[0023] a third gear fixed to the surface of the support shaft;

[0024] A connecting plate is provided on the outer side of the third gear and is meshed with the third gear, and a forward and backward sliding structure is formed between the connecting plate and the barrel;

[0025] A return spring is provided on the front side of the connecting plate to provide thrust therefor;

[0026] An extrusion wheel is arranged on the rear side of the connecting plate;

[0027] The driving shaft is fixed on the surface of the extrusion wheel, and the center of the extrusion wheel and the center of the driving shaft are staggered;

[0028] The motor is arranged above the drive shaft to control the rotation of the drive shaft.

[0029] To further optimize this technical solution, a support plate is fixed on the material bucket, the motor is installed above the support plate, an auxiliary rod is arranged inside the material bucket, the auxiliary rod passes through and is rotatably connected between the support plates, and a stirring rod is fixed on the surface of the auxiliary rod. Moreover, a transmission belt is arranged outside the auxiliary rod, and the auxiliary rod is connected to the drive shaft through the transmission belt. The transmission belt is located inside the support plate.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] The material opening is blocked and controlled by the baffle. During pouring, the baffle automatically moves to open the material opening to achieve automatic addition of the inoculant. After stopping pouring, the baffle resets to block the through opening, without the need for manual control again, making use and operation more convenient;

[0032] Through the setting of the rotating shaft and the guiding rod, vertical positioning is provided for the material bucket, so that the ladle remains vertical when rotating, and the guiding rod can drive the slider to slide inside the fixed block. At the same time, the guiding rod slides vertically inside the slider to adapt to the position change of the ladle;

[0033] The cover body provides shielding protection above the material bucket, and the cover body is connected to the guiding rod. By rotating the cover body, it can be removed from the material bucket, facilitating the addition and replenishment of products inside the material bucket;

[0034] The pouring of the ladle is monitored by the pushing plate. During pouring, the liquid flow will move the pushing plate, so that the pushing plate controls the baffle to move through the mounting shaft and the driving plate, and the material opening and the through opening are aligned to automatically open the inoculant channel. When pouring stops, the pushing plate resets, and the baffle continues to block the through opening to automatically close the inoculation channel;

[0035] The reciprocating rotation of the support shaft can drive the blanking pipe to reciprocate and swing, increasing its blanking range, enabling the materials flowing through the ladle gate to be more evenly mixed, and improving the quality of the subsequent poured products. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a three-dimensional structure schematic diagram of the present invention;

[0037] Figure 2 It is a side view structure schematic diagram of the present invention;

[0038] Figure 3 It is a schematic diagram of the ladle rotation of the present invention;

[0039] Figure 4 It is a three-dimensional structure schematic diagram of the material bucket of the present invention;

[0040] Figure 5 Schematic side-sectional view of the fixed block of the present invention;

[0041] Figure 6 Schematic top view of the material barrel of the present invention;

[0042] Figure 7 Schematic main-sectional view of the material barrel of the present invention;

[0043] Figure 8 Schematic three-dimensional view of the baffle of the present invention;

[0044] Figure 9 Schematic main-sectional view of the movable plate of the present invention;

[0045] Figure 10 For the present invention Figure 9 Schematic enlarged view of the a position in the present invention;

[0046] Figure 11 Schematic top-sectional view of the third gear structure of the present invention;

[0047] Figure 12 Schematic top-sectional view of the support plate of the present invention.

[0048] In the figure: 1, hanging rack; 2, ladle; 3, connecting shaft; 4, material barrel; 5, rotating shaft; 6, support seat; 7, guiding rod; 8, fixed block; 9, slider; 10, cover body; 11, through port; 12, connecting hose; 13, blanking pipe; 14, baffle; 15, material port; 16, first gear; 17, driving plate; 18, mounting shaft; 19, pushing plate; 20, movable plate; 21, second gear; 22, torsion spring; 23, support shaft; 24, third gear; 25, connecting plate; 26, return spring; 27, pressing wheel; 28, driving shaft; 29, motor; 30, support plate; 31, auxiliary rod; 32, stirring rod; 33, transmission belt. Detailed implementation manners

[0049] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0050] Please refer to Figures 1-12 , the present invention provides the following technical solutions: A suspended casting pouring in-stream inoculation machine, including a hanging rack 1, a ladle 2 and a connecting shaft 3. The ladle 2 is arranged inside the hanging rack 1, and connecting shafts 3 are symmetrically fixed on the front and rear sides of the ladle 2. A rotational connection is formed between the connecting shaft 3 and the hanging rack 1;

[0051] Example 1:

[0052] The invention provides a technical solution, which discloses that a material bucket 4 for storing inoculant is arranged above the pouring gate of the pouring ladle 2, and rotating shafts 5 are symmetrically fixed on the front and rear sides of the material bucket 4. The end of the rotating shaft 5 is rotatably connected with a support seat 6. The support seat 6 is fixed on the outside of the pouring ladle 2 and moves synchronously with the pouring ladle 2. A vertical positioning mechanism is arranged above the material bucket 4 to control the material bucket 4 to maintain a vertical state when the pouring ladle 2 rotates. A through port 11 for discharging materials is arranged inside the material bucket 4, and a blanking pipe 13 is connected to the outside of the through port 11. The left end of the blanking pipe 13 is located outside the material bucket 4 to discharge the inoculant. A baffle 14 is arranged outside the through port 11 to block the through port 11. A material port 15 is arranged below the baffle 14. A vertical sliding structure is formed between the baffle 14 and the material bucket 4. By sliding the baffle 14 upward, the through port 11 and the material port 15 are opposed to each other, and the through port 11 is opened. A driving plate 17 is fixed below the baffle 14, and a movement control mechanism is arranged outside the driving plate 17 to automatically control the movement of the baffle 14 during pouring. The vertical positioning mechanism includes a guiding rod 7, a fixing block 8 and a slider 9. The guiding rod 7 is installed above the material bucket 4. The fixing block 8 is fixed on the left side of the hanging bracket 1. The slider 9 is arranged inside the fixing block 8 and forms a left-right sliding structure with the fixing block 8. The upper end of the guiding rod 7 penetrates through the slider 9 and forms an up-down sliding structure with the slider 9. Ball beads are arranged on the surface of the slider 9. A cover body 10 is arranged above the material bucket 4. A threaded connection is formed between the cover body 10 and the material bucket 4. The cover body 10 is fixedly connected to the lower end of the guiding rod 7;

[0053] During use, the pouring ladle 2 can be moved to the pouring position through the hanging bracket 1. The inoculant is added to the material bucket 4 in advance. When the pouring ladle 2 is rotated for pouring, the pouring ladle 2 drives the rotating shaft 5 and the material bucket 4 to move through the support seat 6. The material bucket 4 rotates through the rotating shaft 5 during movement. At the same time, the guiding rod 7 slides vertically in the slider 9 and drives the slider 9 to move in the fixing block 8, so that the material bucket 4 maintains a vertical state. During pouring, the baffle 14 will move upward to make the material port 15 and the through port 11 opposed to each other. The inoculant in the material bucket 4 enters the blanking pipe 13 through the material port 15 and is discharged outward to be mixed with the pouring liquid.

[0054] Example 2:

[0055] On the basis of embodiment 1, a movement control mechanism is disclosed, which includes a first gear 16, a mounting shaft 18 and an automatic trigger mechanism. The first gear 16 is arranged on the right side of the driving plate 17 and is meshed with the driving plate 17. The mounting shaft 18 is fixed in the middle of the first gear 16, and the mounting shaft 18 and the barrel 4 are connected in rotation. The automatic trigger mechanism is connected to the mounting shaft 18 to control the rotation of the mounting shaft 18. The automatic trigger mechanism includes a pushing plate 19, a movable plate 20 and a second gear 21. The pushing plate 19 is arranged below the barrel 4, and the pushing plate 19 is designed in an arc-shaped structure. The movable plate 20 is fixed above the pushing plate 19, and the upper end of the movable plate 20 is located between the bottom of the barrel 4 and the barrel 4 to form a left and right sliding structure. The second gear 21 is arranged above the movable plate 20 and is meshed with the movable plate 20, and the second gear 21 is fixedly connected to the mounting shaft 18. A torsion spring 22 is provided at the end of the mounting shaft 18 to provide a rotational reset force for the mounting shaft 18, so that the baffle 14 can fall automatically.

[0056] When pouring is not in progress, the baffle 14 keeps blocking the opening 11. During pouring, the fluid flows toward the gate of the ladle 2. When the fluid flows, it will push the push plate 19 to move. The push plate 19 drives the second gear 21 to rotate through the movable plate 20. The second gear 21 drives the mounting shaft 18 to rotate. The mounting shaft 18 drives the first gear 16 to rotate. The first gear 16 will drive the driving plate 17 and the baffle 14 to move upward through the engagement with the driving plate 17, so that the material port 15 and the opening 11 are opposite, so that the discharge pipe 13 can discharge the material. After the subsequent pouring is completed, the thrust exerted on the push plate 19 disappears, and the torsion spring 22 will drive the support shaft 23 to reset and rotate, so that the baffle 14 moves downward, continues to keep the opening 11 blocked, and stops the discharge of the discharge pipe 13, thereby realizing the effect of automatic discharge during pouring and automatic stop of discharge when pouring stops, without the need for additional manual control.

[0057] Example 3:

[0058] On the basis of the first embodiment, it is disclosed that a connecting hose 12 is connected to the outside of the through port 11. The connecting hose 12 is connected to the blanking pipe 13. Support shafts 23 are fixed at both the upper and lower ends of the blanking pipe 13. The support shafts 23 are rotatably connected to the material bucket 4. A reciprocating control mechanism is arranged on the outer side of the support shafts 23. The reciprocating control mechanism includes a third gear 24, a connecting plate 25, a return spring 26, a pressing wheel 27, a driving shaft 28 and a motor 29. The third gear 24 is fixed on the surface of the support shaft 23. The connecting plate 25 is arranged outside the third gear 24 and is in meshing connection with the third gear 24. The connecting plate 25 and the material bucket 4 form a front-back sliding structure. The return spring 26 is arranged on the front side of the connecting plate 25 to provide a thrust for it. The pressing wheel 27 is arranged on the rear side of the connecting plate 25. The driving shaft 28 is fixed on the surface of the pressing wheel 27. The center of the pressing wheel 27 and the center of the driving shaft 28 are arranged offset from each other. The motor 29 is arranged above the driving shaft 28 to control the rotation of the driving shaft 28. A support plate 30 is fixed on the material bucket 4. The motor 29 is installed above the support plate 30. An auxiliary rod 31 is arranged inside the material bucket 4. The auxiliary rod 31 passes through the support plate 30 and is rotatably connected to the support plate 30. A stirring rod 32 is fixed on the surface of the auxiliary rod 31. A transmission belt 33 is arranged on the outer side of the auxiliary rod 31. The auxiliary rod 31 is connected to the driving shaft 28 through the transmission belt 33. The transmission belt 33 is located inside the support plate 30;

[0059] During blanking, the motor 29 can drive the driving shaft 28 to rotate. The driving shaft 28 drives the eccentric rotation of the pressing wheel 27, so that it presses the connecting plate 25. Cooperating with the return spring 26, the connecting plate 25 makes a reciprocating movement. The connecting plate 25 drives the support shaft 23 to make a reciprocating rotation through the meshing with the third gear 24, controls the swinging of the blanking pipe 13, improves the blanking range. When the driving shaft 28 rotates, it can drive the auxiliary rod 31 to rotate through the transmission belt 33. The auxiliary rod 31 drives the stirring rod 32 to stir the products in the material bucket 4 to prevent them from coagulating.

[0060] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0061] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A suspension type in-stream inoculation machine for casting pouring, comprising a hanging rack (1), a ladle (2) and a connecting shaft (3). The ladle (2) is arranged inside the hanging rack (1), and connecting shafts (3) are symmetrically fixed on the front and rear sides of the ladle (2). A rotational connection is formed between the connecting shafts (3) and the hanging rack (1). It is characterized in that: Above the pouring port of the ladle (2), there is a material bucket (4) for storing inoculant. Rotating shafts (5) are symmetrically fixed on the front and rear sides of the material bucket (4). The end of the rotating shaft (5) is rotationally connected to a support seat (6). The support seat (6) is fixed on the outside of the ladle (2) and moves synchronously with the ladle (2). Above the material bucket (4), there is a vertical positioning mechanism to control the material bucket (4) to maintain a vertical state when the ladle (2) rotates. Inside the material bucket (4), there is a through port (11) for discharging materials. The outside of the through port (11) is connected to a blanking pipe (13). The left end of the blanking pipe (13) is located outside the material bucket (4) to discharge the inoculant. A baffle (14) is arranged outside the through port (11) to block the through port (11). Below the baffle (14), there is a material opening (15). A vertical sliding structure is formed between the baffle (14) and the material bucket (4). By sliding the baffle (14) upwards, the through port (11) and the material opening (15) are opposite to each other, and the through port (11) is opened. A driving plate (17) is fixed below the baffle (14), and a moving control mechanism is arranged outside the driving plate (17) to automatically control the movement of the baffle (14) during pouring. The moving control mechanism includes a first gear (16), a mounting shaft (18) and an automatic triggering mechanism. The first gear (16) is arranged on the right side of the driving plate (17) and forms a meshing connection with the driving plate (17). The mounting shaft (18) is fixed in the middle of the first gear (16), and a rotational connection is formed between the mounting shaft (18) and the material bucket (4). The automatic triggering mechanism is connected to the mounting shaft (18) to control the rotation of the mounting shaft (18). The automatic triggering mechanism includes a pushing plate (19), a movable plate (20) and a second gear (21). The pushing plate (19) is arranged below the material bucket (4), and the pushing plate (19) is designed in an arc structure. The movable plate (20) is fixed above the pushing plate (19), and the upper end of the movable plate (20) is located at the bottom of the material bucket (4) and forms a left-right sliding structure with the material bucket (4). The second gear (21) is arranged above the movable plate (20) and forms a meshing connection with the movable plate (20), and the second gear (21) is fixedly connected to the mounting shaft (18).

2. A suspension type in-mold inoculator for casting pouring according to claim 1, characterized in that: The vertical positioning mechanism includes a guiding rod (7), a fixed block (8) and a slider (9). The guiding rod (7) is installed above the material bucket (4). The fixed block (8) is fixed on the left side of the hanging rack (1). The slider (9) is arranged inside the fixed block (8) and forms a left-right sliding structure with the fixed block (8). The upper end of the guiding rod (7) passes through the slider (9) and forms an up-down sliding structure with the slider (9). And balls are arranged on the surface of the slider (9).

3. A suspension type in-stream inoculation machine for casting and pouring according to claim 2, characterized in that: Above the material barrel (4), a cover body (10) is provided. The cover body (10) and the material barrel (4) are threadedly connected, and the lower end of the cover body (10) is fixedly connected to the guide rod (7).

4. A in-mold inoculator for hanging type casting pouring according to claim 1, characterized in that: At the end of the mounting shaft (18), a torsion spring (22) is provided to provide a rotational restoring force for the mounting shaft (18) so that the baffle (14) can automatically fall.

5. A suspension type in-mold inoculation machine for casting pouring according to claim 1, characterized in that: Outside the through port (11), a connecting hose (12) is connected. The connecting hose (12) is connected to the blanking pipe (13). At both the upper and lower ends of the blanking pipe (13), support shafts (23) are fixed. The support shafts (23) and the material barrel (4) are rotationally connected, and a reciprocating control mechanism is provided outside the support shafts (23).

6. A suspension type in-stream inoculation machine for casting and pouring according to claim 5, characterized in that: The reciprocating control mechanism includes a third gear (24), a connecting plate (25), a return spring (26), an extrusion wheel (27), a drive shaft (28), and a motor (29). The third gear (24) is fixed on the surface of the support shaft (23). The connecting plate (25) is arranged outside the third gear (24) and meshes with the third gear (24). The connecting plate (25) and the material barrel (4) form a front-back sliding structure. The return spring (26) is arranged on the front side of the connecting plate (25) to provide a thrust for it. The extrusion wheel (27) is arranged on the rear side of the connecting plate (25). The drive shaft (28) is fixed on the surface of the extrusion wheel (27), and the center of the extrusion wheel (27) and the center of the drive shaft (28) are arranged offset from each other. The motor (29) is arranged above the drive shaft (28) to control the rotation of the drive shaft (28).

7. A in-mold inoculator for suspended casting pouring according to claim 6, characterized in that: On the material barrel (4), a support plate (30) is fixed. The motor (29) is installed above the support plate (30). Inside the material barrel (4), an auxiliary rod (31) is provided. The auxiliary rod (31) passes through the support plate (30) and is rotationally connected to the support plate (30). On the surface of the auxiliary rod (31), a stirring rod (32) is fixed. A transmission belt (33) is provided outside the auxiliary rod (31). The auxiliary rod (31) is connected to the drive shaft (28) through the transmission belt (33), and the transmission belt (33) is located inside the support plate (30).

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