Uniform-heating twin-screw extruder and heating method thereof

By setting a heating plate and a stirring mechanism on the inner wall of the stirring drum of the twin-screw extruder, and using the drive mechanism to achieve synchronous work between the stirring mechanism and the conveying mechanism, the uneven material stirring and multiple driving of the motor equipment in the prior art are solved. Problem: Even heating and stirring of materials are achieved, reducing production costs.

CN119458850AInactive Publication Date: 2025-02-18ANHUI JINTANG RECYCLING TECH CO LTD
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Patent Information

Application Number
CN202411757368.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-03
Publication Date
2025-02-18
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The existing twin-screw extruders cannot achieve sufficient and uniform stirring during the material stirring process, and the multiple drives of the motor equipment increase costs.

Method used

A twin-screw extruder with uniform heating is designed, and a heating plate and a stirring mechanism are arranged on the inner wall of the stirring drum. The stirring mechanism and the conveying mechanism are driven to work simultaneously through the driving mechanism to achieve uniform heating and stirring of the materials.

Benefits of technology

The material is fully and evenly stirred and heated, which reduces the number of motor equipment and reduces production costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention provides a uniform-heating double-screw extruder and a heating method thereof, and relates to the technical field of double-screw extruders. The double-screw extruder with the uniform heating function comprises a stirring barrel and a feeding port, a heating plate is arranged on the inner wall of the stirring barrel, a stirring mechanism for stirring materials is arranged in the stirring barrel, a communicating pipe is arranged at the bottom of the stirring barrel, a conveying mechanism is connected to the bottom of the communicating pipe, and the conveying mechanism is used for extruding the materials; the device further comprises a driving mechanism, the first output end of the driving mechanism is connected with the stirring mechanism so as to drive the stirring mechanism to conduct stirring work, and the second output end of the driving mechanism is connected with the conveying mechanism so as to drive the conveying mechanism to conduct conveying work. Through the driving effect of the driving mechanism, on one hand, the stirring mechanism is driven to rotate to stir materials, and on the other hand, the conveying mechanism is driven to work to achieve the conveying effect.
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Description

Technical Field

[0001] The invention relates to the technical field of twin-screw extruders, in particular to a twin-screw extruder with uniform heating and a heating method thereof. Background Art

[0002] The twin-screw extruder is developed on the basis of the single-screw extruder. Due to its good feeding performance, mixing and plasticizing performance, exhaust performance, and extrusion stability, it has been widely used in the molding processing of extruded products. The twin-screw extruder is composed of several parts such as a transmission device, a feeding device, a barrel and a screw. Compared with a single-screw extruder, a twin-screw extruder can make the melt get more fully mixed.

[0003] In the prior art, in the process of stirring materials, a single stirring rod is mostly used for unidirectional stirring, that is, the materials cannot be fully and evenly stirred; secondly, a motor device is required to drive the stirring rod to rotate, and another motor device is required to drive the parallel twin screws to rotate. The installation of two sets of motor equipment increases costs. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies of the prior art, the present invention provides a twin-screw extruder with uniform heating and a heating method thereof, which solves the problems raised by the above-mentioned background technology.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a twin-screw extruder with uniform heating, comprising a mixing drum and a feed inlet, the inner wall of the mixing drum is provided with a heating plate, the interior of the mixing drum is provided with a stirring mechanism for stirring the material, the bottom of the mixing drum is provided with a connecting pipe, the bottom of the connecting pipe is connected to a conveying mechanism, and the conveying mechanism is used to extrude the material; the material enters the mixing drum through the feed inlet, the heating plate heats it, and the stirring mechanism stirs it, and after the stirring is completed, the material enters the conveying mechanism through the connecting pipe and is extruded and conveyed out by the conveying mechanism.

[0008] The device also includes a driving mechanism, wherein the output end 1 of the driving mechanism is connected to the stirring mechanism, thereby driving the stirring mechanism to stir, and the output end 2 of the driving mechanism is connected to the conveying mechanism, thereby driving the conveying mechanism to convey. Under the driving action of the driving mechanism, the stirring mechanism and the conveying mechanism are driven to work synchronously to achieve linkage.

[0009] Preferably, the stirring mechanism includes a gear ring fixedly connected to the inner wall of the stirring drum, a rotating connecting shaft is provided in the middle of the gear ring, the bottom end of the connecting shaft is fixedly connected to a first gear, the bottom of the first gear is fixedly connected to a first rotating rod, and the outer wall of the first rotating rod is fixedly connected to a first stirring rod.

[0010] Preferably, the first gear is meshed with a second gear on both sides, the outer side of the second gear is meshed with the inner wall of the gear ring, the middle part of the second gear is fixedly connected to a second rotating rod, the outer wall of the second rotating rod is fixedly connected to a second stirring rod, the outside of the second stirring rod is fixedly connected to a scraper that fits the inner wall of the mixing drum, and the bottom end of the second rotating rod is fixedly connected to a guide rod.

[0011] Preferably, a connecting plate is fixedly connected to the outer wall of the connecting shaft, and the second rotating rod is rotatably connected to the bottom of the connecting plate.

[0012] Preferably, a solenoid valve is provided on the outside of the connecting pipe.

[0013] Preferably, the conveying mechanism comprises a conveyor connected to the bottom of the connecting pipe, two conveying screws rotating synchronously and in the same direction are arranged inside the conveyor, and a discharge port is opened at the right bottom of the conveyor.

[0014] Preferably, the driving mechanism comprises a fixed frame, a driving motor is arranged at the upper end of the fixed frame, an output end of the driving motor penetrates into the interior of the fixed frame and is fixedly connected with a driving rod, one side of the driving rod is rotatably connected with a first transmission rod through a bevel gear set, and a right end of the first transmission rod is rotatably connected with a connecting shaft through a bevel gear set;

[0015] The driving rod is a two-stage type, and a clutch is arranged in the middle thereof. The bottom of the driving rod is rotatably connected to a second transmission rod through a bevel gear set. The right end of the second transmission rod is connected to a double-axis reduction mechanism, and the output end of the double-axis reduction mechanism is connected to a conveying screw.

[0016] Preferably, the dual-axis reduction mechanism includes a connecting rod connected to the second transmission rod, the outer wall of the connecting rod is fixedly connected to a third gear, both sides of the third gear are meshedly connected to fourth gears, the middle part of the fourth gear is fixedly connected to a reduction shaft, and the reduction shaft is fixedly connected to the conveying screw.

[0017] Preferably, the bottom of the conveying mechanism is provided with supporting legs for support.

[0018] The present invention further discloses a heating method for a twin-screw extruder with uniform heating, based on the above-mentioned twin-screw extruder with uniform heating, comprising the following steps:

[0019] Step 1: Add materials into the mixing drum through the inlet;

[0020] Step 2: Turn on the switches of the driving mechanism and the heating plate, drive the stirring mechanism to perform stirring work, and after the stirring is completed, drive the conveying mechanism to perform conveying work.

[0021] (III) Beneficial effects

[0022] The present invention provides a twin-screw extruder with uniform heating and a heating method thereof, which have the following beneficial effects:

[0023] 1. A stirring mechanism is provided, which drives the first gear to rotate by rotating the connecting shaft, and then drives the first rotating rod and the first stirring rod to rotate; secondly, the first gear drives the two second gears to rotate while the two second gears revolve around the gear ring, and then drives the second rotating rod and the second stirring rod to rotate and revolve, thereby enhancing the stirring effect on the material.

[0024] 2. A driving mechanism is provided, which drives the driving rod to rotate through the driving action of the driving motor. On the one hand, it drives the first transmission rod to rotate, and then drives the connecting shaft and the stirring mechanism to rotate. On the other hand, it drives the second transmission rod to rotate, and then drives the connecting rod and the conveying screw to rotate to realize the conveying effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a cross-sectional schematic diagram of a mixing drum of the present invention;

[0027] Figure 3 It is a schematic diagram of the stirring mechanism of the present invention;

[0028] Figure 4 It is a cross-sectional schematic diagram of the conveying mechanism of the present invention;

[0029] Figure 5 It is a cross-sectional schematic diagram of the driving mechanism of the present invention;

[0030] Figure 6 It is a schematic diagram of the dual-axis speed reduction mechanism of the present invention.

[0031] Among them, 1. mixing drum; 2. mixing mechanism; 3. connecting pipe; 4. conveying mechanism; 5. driving mechanism; 6. double-axis speed reduction mechanism; 7. supporting legs; 8. heating plate;

[0032] 201, gear ring; 202, connecting shaft; 203, first gear; 204, first rotating rod; 205, first stirring rod; 206, second gear; 207, second rotating rod; 208, second stirring rod; 209, guide rod; 210, scraper; 211, connecting plate;

[0033] 31. Solenoid valve;

[0034] 41. conveyor; 42. conveying screw; 43. discharge port;

[0035] 51. Fixed frame; 52. Driving motor; 53. Driving rod; 54. First transmission rod; 55. Second transmission rod; 56. Clutch;

[0036] 61. Connecting rod; 62. Third gear; 63. Fourth gear; 64. Reduction shaft. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1:

[0039] like Figure 1 , Figure 2 and Figure 4 As shown, an embodiment of the present invention provides a twin-screw extruder with uniform heating, including a mixing drum 1 and a feed port, the inner wall of the mixing drum 1 is provided with a heating plate 8, the interior of the mixing drum 1 is provided with a mixing mechanism 2 for mixing the material, the bottom of the mixing drum 1 is provided with a connecting pipe 3, the outer side of the connecting pipe 3 is provided with a solenoid valve 31, the bottom of the connecting pipe 3 is connected to a conveying mechanism 4, the conveying mechanism 4 is used to extrude the material, and the bottom of the conveying mechanism 4 is provided with a supporting leg 7 for support.

[0040] In the above structure, the material enters the mixing drum 1 through the feed port, is heated by the heating plate 8, and is stirred by the stirring mechanism 2. After the stirring is completed, the material enters the conveying mechanism 4 through the connecting pipe 3 and is extruded and conveyed out by the conveying mechanism 4.

[0041] It also includes a driving mechanism 5, an output end 1 of the driving mechanism 5 is connected to the stirring mechanism 2, thereby driving the stirring mechanism 2 to perform stirring work, and an output end 2 of the driving mechanism 5 is connected to the conveying mechanism 4, thereby driving the conveying mechanism 4 to perform conveying work.

[0042] The above structure, under the driving action of the driving mechanism 5, drives the stirring mechanism 2 and the conveying mechanism 4 to work synchronously and realize linkage.

[0043] An embodiment of the present invention provides a heating method for a twin-screw extruder with uniform heating, based on the above-mentioned twin-screw extruder with uniform heating, comprising the following steps:

[0044] Step 1: Add materials into the mixing drum 1 through the feed inlet;

[0045] Step 2: Turn on the switches of the driving mechanism 5 and the heating plate 8, drive the stirring mechanism 2 to perform stirring work, and after the stirring is completed, drive the conveying mechanism 4 to perform conveying work.

[0046] Embodiment 2:

[0047] Based on the first embodiment, Figure 3 Specifically, the stirring mechanism 2 includes a gear ring 201 fixedly connected to the inner wall of the stirring drum 1, a rotating connecting shaft 202 is provided in the middle of the gear ring 201, a first gear 203 is fixedly connected to the bottom end of the connecting shaft 202, a first rotating rod 204 is fixedly connected to the bottom of the first gear 203, and a first stirring rod 205 is fixedly connected to the outer wall of the first rotating rod 204. Secondly, the second gear 206 is meshed and connected on both sides of the first gear 203, the outer side of the second gear 206 is meshed with the inner wall of the gear ring 201, the middle part of the second gear 206 is fixedly connected with the second rotating rod 207, the outer wall of the connecting shaft 202 is fixedly connected with the connecting plate 211, the second rotating rod 207 is rotatably connected to the bottom of the connecting plate 211, and plays a connecting role, the outer wall of the second rotating rod 207 is fixedly connected with the second stirring rod 208, the outside of the second stirring rod 208 is fixedly connected with a scraper 210 that fits the inner wall of the mixing drum 1, and the bottom end of the second rotating rod 207 is fixedly connected with a guide rod 209.

[0048] The above structure drives the first gear 203 to rotate through the rotation of the connecting shaft 202, and then drives the first rotating rod 204 and the first stirring rod 205 to rotate on their own; secondly, the first gear 203 drives the two second gears 206 to rotate on their own while the two second gears 206 revolve around the gear ring 201, and then drives the second rotating rod 207 and the second stirring rod 208 to rotate on their own and revolve on their own, thereby enhancing the stirring effect on the material.

[0049] Combination Figure 4 Specifically, the conveying mechanism 4 includes a conveyor 41 connected to the bottom of the connecting pipe 3, and two conveying screws 42 that rotate synchronously and in the same direction are arranged inside the conveyor 41. A discharge port 43 is opened at the right bottom of the conveyor 41.

[0050] The above structure can extrude and convey the material through two conveying screws 42 that rotate synchronously and in the same direction.

[0051] Combination Figure 5 Specifically, the driving mechanism 5 includes a fixed frame 51, a driving motor 52 is arranged at the upper end of the fixed frame 51, an output end of the driving motor 52 penetrates into the interior of the fixed frame 51, and is fixedly connected with a driving rod 53, one side of the driving rod 53 is rotatably connected with a first transmission rod 54 through a bevel gear set, and the right end of the first transmission rod 54 is rotatably connected with the connecting shaft 202 through a bevel gear set;

[0052] The driving rod 53 is a two-stage type, and a clutch 56 is arranged in the middle thereof to play the role of on and off. The bottom of the driving rod 53 is rotatably connected to the second transmission rod 55 through a bevel gear set. The right end of the second transmission rod 55 is connected to a dual-axis reduction mechanism 6, and the output end of the dual-axis reduction mechanism 6 is connected to the conveying screw 42.

[0053] The above structure, through the driving action of the driving motor 52, drives the driving rod 53 to rotate, which on the one hand drives the first transmission rod 54 to rotate, and then drives the connecting shaft 202 and the stirring mechanism 2 to rotate, and on the other hand drives the second transmission rod 55 to rotate, and then drives the conveying screw 42 to rotate, thereby realizing the conveying effect.

[0054] Combination Figure 6 Specifically, the dual-axis reduction mechanism 6 includes a connecting rod 61 connected to the second transmission rod 55, the outer wall of the connecting rod 61 is fixedly connected to the third gear 62, both sides of the third gear 62 are meshedly connected to the fourth gear 63, the middle part of the fourth gear 63 is fixedly connected to the reduction shaft 64, and the reduction shaft 64 is fixedly connected to the conveying screw 42.

[0055] In the above structure, both sides of the third gear 62 are meshedly connected with the fourth gear 63, and the number of teeth of the fourth gear 63 is four times the number of teeth of the third gear 62, thereby achieving a deceleration effect.

[0056] An embodiment of the present invention provides a heating method for a twin-screw extruder with uniform heating, based on the above-mentioned twin-screw extruder with uniform heating, comprising the following steps:

[0057] Step 1: Add materials into the mixing drum 1 through the feed inlet;

[0058] Step 2: Disconnect the clutch 56, turn on the switch of the drive motor 52 and the heating plate 8, drive the stirring mechanism 2 to perform stirring work, after the stirring is completed, connect the clutch 56, and then turn on the switch of the solenoid valve 31, the material enters the conveyor 41, and through two synchronous and co-rotating conveying screws 42, the material can be squeezed and conveyed out from the discharge port 43.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A twin-screw extruder with uniform heating, characterized in that: The invention comprises a mixing drum (1) and a material inlet, wherein the inner wall of the mixing drum (1) is provided with a heating plate (8), the interior of the mixing drum (1) is provided with a mixing mechanism (2) for mixing materials, the bottom of the mixing drum (1) is provided with a connecting pipe (3), the bottom of the connecting pipe (3) is connected with a conveying mechanism (4), and the conveying mechanism (4) is used for extruding materials; The invention also comprises a driving mechanism (5), wherein an output end 1 of the driving mechanism (5) is connected to the stirring mechanism (2), thereby driving the stirring mechanism (2) to perform stirring work, and an output end 2 of the driving mechanism (5) is connected to the conveying mechanism (4), thereby driving the conveying mechanism (4) to perform conveying work.

2. A twin-screw extruder with uniform heating according to claim 1, characterized in that: The stirring mechanism (2) comprises a gear ring (201) fixedly connected to the upper inner wall of the stirring drum (1); a rotatable connecting shaft (202) is arranged in the middle of the gear ring (201); a first gear (203) is fixedly connected to the bottom end of the connecting shaft (202); a first rotating rod (204) is fixedly connected to the bottom of the first gear (203); and a first stirring rod (205) is fixedly connected to the outer wall of the first rotating rod (204).

3. A twin-screw extruder with uniform heating according to claim 2, characterized in that: The first gear (203) is meshedly connected to the second gear (206) on both sides, the outer side of the second gear (206) is meshed with the inner wall of the gear ring (201), the middle part of the second gear (206) is fixedly connected to the second rotating rod (207), the outer wall of the second rotating rod (207) is fixedly connected to the second stirring rod (208), the outside of the second stirring rod (208) is fixedly connected to a scraper (210) that is in contact with the inner wall of the stirring drum (1), and the bottom end of the second rotating rod (207) is fixedly connected to a guide rod (209).

4. A twin-screw extruder with uniform heating according to claim 3, characterized in that: A connecting plate (211) is fixedly connected to the outer wall of the connecting shaft (202), and the second rotating rod (207) is rotatably connected to the bottom of the connecting plate (211).

5. A twin-screw extruder with uniform heating according to claim 1, characterized in that: A solenoid valve (31) is arranged on the outside of the connecting pipe (3).

6. A twin-screw extruder with uniform heating according to claim 1, characterized in that: The conveying mechanism (4) comprises a conveyor (41) connected to the bottom of the connecting pipe (3), two conveying screws (42) rotating synchronously and in the same direction are arranged inside the conveyor (41), and a discharge port (43) is opened at the right bottom of the conveyor (41).

7. A twin-screw extruder with uniform heating according to claim 1, characterized in that: The driving mechanism (5) comprises a fixed frame (51), a driving motor (52) is arranged at the upper end of the fixed frame (51), an output end of the driving motor (52) penetrates into the interior of the fixed frame (51) and is fixedly connected to a driving rod (53), one side of the driving rod (53) is rotatably connected to a first transmission rod (54) via a bevel gear set, and a right end of the first transmission rod (54) is rotatably connected to a connecting shaft (202) via a bevel gear set; The driving rod (53) is of a two-stage type, and a clutch (56) is arranged in the middle thereof. The bottom of the driving rod (53) is rotatably connected to a second transmission rod (55) via a bevel gear set. The right end of the second transmission rod (55) is connected to a double-shaft reduction mechanism (6), and the output end of the double-shaft reduction mechanism (6) is connected to a conveying screw (42).

8. A twin-screw extruder with uniform heating according to claim 7, characterized in that: The dual-axis speed reduction mechanism (6) comprises a connecting rod (61) connected to the second transmission rod (55); the outer wall of the connecting rod (61) is fixedly connected to a third gear (62); both sides of the third gear (62) are meshedly connected to fourth gears (63); the middle of the fourth gear (63) is fixedly connected to a speed reduction shaft (64); and the speed reduction shaft (64) is fixedly connected to the conveying screw (42).

9. A twin-screw extruder with uniform heating according to claim 1, characterized in that: The bottom of the conveying mechanism (4) is provided with supporting legs (7).

10. A method for heating a twin-screw extruder with uniform heating, based on the twin-screw extruder with uniform heating according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Add materials into the mixing drum (1) through the material inlet; Step 2: Turn on the switches of the driving mechanism (5) and the heating plate (8), drive the stirring mechanism (2) to perform stirring, and after the stirring is completed, drive the conveying mechanism (4) to perform conveying.