Conduction oil heater for EVA (Ethylene Vinyl Acetate) foaming material internal mixer

Abstract

The invention discloses a heat conduction oil heater for an EVA foaming material internal mixer, and belongs to the technical field of EVA foaming material processing.The heat conduction oil heater comprises a heating furnace, the outer surface of the heating furnace is fixedly connected with a support, the right side of the heating furnace is in bolted connection with a feeding pipe, and the left side of the heating furnace is in bolted connection with a discharging pipe; the inner wall of the heating furnace is fixedly connected with an inner plate; a connecting shaft is rotationally arranged in the inner plate, and a water wheel is fixedly connected to the right side surface of the connecting shaft; a cleaning assembly is arranged between the feeding pipe and the connecting shaft. When the heat conduction oil heater for the EVA foaming material internal mixer works, in the circulation process of heat conduction oil, the heat conduction oil enters a heating furnace through a feeding pipe and is discharged out of the heating furnace through a discharging pipe, when the heat conduction oil enters the heating furnace through the feeding pipe, a connecting shaft is driven by a water wheel to rotate in an inner plate, and at the moment, mixing blades rotate; furthermore, the mixing blades play a role in mixing materials, so that the heat-conducting oil is uniformly heated.

Description

Technical Field

[0001] The invention relates to the technical field of EVA foam material processing, in particular to a heat-conducting oil heater used for an EVA foam material internal mixer. Background Art

[0002] EVA foam material is a lightweight multifunctional polymer material, which has excellent cushioning and shock resistance, good softness, and good corrosion resistance. EVA foam material can be used to process toys and handicrafts.

[0003] When processing EVA foam materials, an internal mixer is needed. When the internal mixer is working, it can mix and disperse the raw materials, and it can also heat and plasticize the raw materials. When the internal mixer is working, it needs to work with a thermal oil heater. When the thermal oil heater is working, it can transfer heat to the inside of the internal mixer, thereby realizing precise control of the internal temperature of the internal mixer.

[0004] When the thermal oil heater is working, the electric heating element is used to transfer heat to the thermal oil. The thermal oil circulates in the system as a heat carrier and transfers heat to the heat-using equipment. In the thermal oil heater, stirring is a very important step. The stirring process can not only improve the heat transfer efficiency, but also prevent local overheating, which is convenient for the operation of the thermal oil heater. The traditional stirring method has a general stirring effect, and then the thermal oil heater will still have local overheating.

[0005] In order to overcome the above defects, prior art 1 (application number CN202311562409.8, application date 2023-11-21 Chinese patent) thermal oil heater and its use method, it is set by flowing thermal oil to drive the turbine blade to rotate, so that the turbine blade drives the rotating shell to rotate, so that the fan blade stirs the thermal oil in the inner cavity of the liquid heater, so that the thermal oil is stirred more evenly in the inner cavity of the liquid heater;

[0006] Prior art 2 (Chinese patent with application number CN201820481000.1 and application date 2018-04-08) A thermal oil heater, which has a stirring shaft disposed therein, the stirring shaft is connected to the output shaft of the motor through a transmission device, and performs deep stirring of the internal material;

[0007] There is also prior art 3 (application number CN201820732368.0, Chinese patent application date 2018-05-17) a gas-fired thermal oil heater, which, compared with the general parallel thermal oil circulation pipe arrangement, uses a spiral structure thermal oil circulation pipe arrangement to increase the heating space of the circulation pipe, which is easier to absorb heat and can make the thermal oil inside the thermal oil circulation pipe be quickly heated. At the same time, the setting of the stirring device makes the internal water temperature heated evenly, so that the heating of the thermal oil is also more uniform, and the heating rate of the thermal oil is improved;

[0008] When the thermal oil heater works for a long time, impurities may accumulate on the inner wall of the pipe of the device to form a dirt layer. The device in the above application does not have a structure for cleaning the inner wall of the pipe during use. Therefore, after long-term use, the dirt layer will hinder the transfer of heat, resulting in reduced heat transfer efficiency and increased energy consumption of the heater.

[0009] In view of the above problems, it is urgent to carry out innovative design based on the original thermal oil heater used in the EVA foam material internal mixer. Summary of the invention

[0010] The purpose of the present invention is to provide a thermal oil heater for an EVA foam material internal mixer to solve the problem proposed in the above background technology that the structure does not have a clean inner wall of the pipeline during use, and then after long-term use, the dirt layer will hinder the transfer of heat, resulting in reduced heat transfer efficiency and increased energy consumption of the heater.

[0011] To achieve the above object, the present invention provides the following technical solution: a heat-conducting oil heater for an EVA foam material internal mixer, comprising a heating furnace, a bracket is fixedly connected to the outer surface of the heating furnace, a feed pipe is bolted to the right side of the heating furnace, and a discharge pipe is bolted to the left side of the heating furnace, and an inner plate is fixedly connected to the inner wall of the heating furnace, and a heating assembly is fixedly connected to the inner wall of the heating furnace;

[0012] A connecting shaft is rotatably arranged inside the inner plate, and a water wheel is fixedly connected to the right surface of the connecting shaft, and a mixing assembly is arranged between the inner plate and the connecting shaft, and the mixing assembly includes mixing blades fixedly connected to the surface of the connecting shaft at equal intervals;

[0013] A cleaning assembly is provided between the feed pipe and the connecting shaft, and the cleaning assembly includes a scraper slidably arranged inside the feed pipe, and the surface of the scraper is in contact with the inner wall of the feed pipe;

[0014] An auxiliary component is arranged inside the feed pipe, and the auxiliary component includes a guide plate fixedly connected to the inner wall of the feed pipe, and a movable plate is slidably arranged on the surface of the guide plate, and a knocking rod is fixedly connected to the surface of the movable plate.

[0015] Preferably, the mixing assembly also includes a lower connecting plate fixedly connected to the lower surface of the inner plate, and a column is fixedly connected to the inner wall of the lower connecting plate, and a side plate is sleeved and connected to the surface of the column, and an auxiliary plate is fixedly connected to the side of the side plate.

[0016] Preferably, through holes are opened on the surface of the auxiliary plate, and the through holes are evenly spaced on the surface of the auxiliary plate, a force-bearing plate is fixedly connected to the upper surface of the side plate, and the side plates are symmetrically distributed about the center of the auxiliary plate, and auxiliary blocks are fixedly connected to the front and rear sides of the auxiliary plate at even intervals, and the surface of the auxiliary blocks is inclined.

[0017] Preferably, a cam is fixedly connected to the surface of the connecting shaft, and the cam corresponds one-to-one to the force-bearing plate, and a connecting spring that plays an elastic reset role is fixedly connected to the lower surface of the side plate, and the other side of the connecting spring is fixedly connected to the inner wall of the lower connecting plate.

[0018] Preferably, the cleaning assembly further comprises a limit plate fixedly connected to the inner wall of the feed pipe, and a vertical plate is slidably provided on the surface of the limit plate, and the limit plate is "U"-shaped when viewed from the front.

[0019] Preferably, the lower surface of the vertical plate is fixedly connected to the upper surface of the scraper, and the surface of the vertical plate is fixedly connected to a connecting rod, and the surface of the connecting rod is inclined, and the surface of the connecting shaft is fixedly connected to a push rod, and the push rods are distributed at equal angles on the surface of the connecting shaft.

[0020] Preferably, a return spring having an elastic return function is fixedly connected to the surface of the vertical plate, and the other side of the return spring is fixedly connected to the inner wall of the limiting plate.

[0021] Preferably, the auxiliary component also includes a working rod fixedly connected to the right side surface of the vertical plate, and the front and rear sides of the working rod are fixedly connected to the first magnet, and the outer wall of the movable plate is fixedly connected to the second magnet.

[0022] Preferably, the second magnet corresponds to the first magnet one-to-one, and the magnetic poles of the second magnet and the first magnet at adjacent positions are opposite.

[0023] Preferably, the knocking rods are evenly spaced on the surface of the movable plate, and the knocking rods are initially in contact with the inner wall of the feed pipe, and an auxiliary spring that plays an elastic reset role is fixedly connected to the surface of the movable plate, and the other side of the auxiliary spring is fixedly connected to the inner wall of the guide plate.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: the heat transfer oil heater for the EVA foam material internal mixer adopts a new structural design, and the water wheel, the connecting shaft and the cam are arranged to drive the mixing blade to rotate, so that the mixing blade plays a stirring role, and at the same time the cam will intermittently push the force plate, and at this time the auxiliary plate will make a reciprocating linear motion in the vertical direction, and the auxiliary plate also plays an auxiliary stirring role, so that the heat transfer oil is heated more evenly, and a cleaning component is also arranged, so that the scraper can make a reciprocating linear motion in the horizontal direction, the scraper can clean impurities, prevent impurities from accumulating, and thus will not form an oil layer, thereby ensuring the heat transfer efficiency, and an auxiliary component is also arranged, when the auxiliary component is working, the knocking rod makes a reciprocating linear motion in the horizontal direction, and the knocking rod prevents impurities from remaining and makes it easier to be taken away by the heat transfer oil, the cleaning component and the auxiliary component work together to optimize the anti-oil effect, and the specific contents are as follows:

[0025] (1) The heat transfer oil heater for the EVA foam material internal mixer, when working, in the process of heat transfer oil circulation, enters the interior of the heating furnace through the feed pipe, and is discharged from the heating furnace through the discharge pipe. When the feed pipe enters the interior of the heating furnace, the water wheel drives the connecting shaft to rotate inside the inner plate, and the mixing blades rotate at this time, and then the mixing blades play a role in mixing materials, so that the heat transfer oil is heated evenly;

[0026] Furthermore, when the connecting shaft rotates, the connecting shaft will drive the cam to rotate synchronously, and then the cam will intermittently push the force-bearing plate. At this time, the force-bearing plate and the auxiliary plate make reciprocating linear motion in the vertical direction under the action of the thrust, the column and the connecting spring. At this time, the auxiliary plate and the through hole play a role in auxiliary stirring, so that the heat transfer oil is heated more evenly.

[0027] (2) The heat-conducting oil heater used in the EVA foam material internal mixer, when the connecting shaft rotates, the connecting shaft will drive the push rod to rotate synchronously, and then the push rod will intermittently push the connecting rod. At this time, the connecting rod and the vertical plate make reciprocating linear motion in the horizontal direction under the action of the thrust, the limit plate and the return spring, and when the vertical plate moves, it will drive the scraper to move synchronously, and then the scraper will clean the inner wall of the feed pipe, so as to prevent the oil from settling and thus prevent the formation of an oil layer, thereby ensuring the heat transfer efficiency;

[0028] (3) The thermal oil heater used in the EVA foam material internal mixer will drive the working rod and the first magnet to move synchronously when the vertical plate makes reciprocating linear motion. At this time, the movable plate makes reciprocating linear motion in the horizontal direction under the action of the mutual magnetic force between the first magnet and the second magnet, the guide plate and the auxiliary spring. Then, the movable plate will drive the knocking rod to hit the inner wall of the feed pipe again and again, so that the feed pipe is in a state of slight vibration, which can also make the oil stains better cleaned, thereby optimizing the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the connection structure between the heating furnace, the feed pipe and the discharge pipe of the present invention;

[0030] Figure 2 It is a schematic diagram of the structure of the heating furnace in a cutaway state of the present invention;

[0031] Figure 3 This is a schematic diagram of the connection structure of the inner plate, the connecting shaft and the mixing blade of the present invention;

[0032] Figure 4 This is a schematic diagram of the auxiliary board of the present invention in working state;

[0033] Figure 5 For the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0034] Figure 6 This is a schematic diagram of the connecting structure of the connecting shaft and the push rod of the present invention;

[0035] Figure 7 It is a schematic diagram of the working state structure of the push rod of the present invention;

[0036] Figure 8 For the present invention Figure 7 The enlarged structural diagram at B in the middle;

[0037] Fig. 9 This is a schematic diagram of the connecting structure of the guide plate and the movable plate of the present invention;

[0038] Fig.10 This is a schematic diagram of the distribution state of the knocking rod of the present invention;

[0039] Fig.11 For the present invention Fig.10 Enlarged structural diagram at point C in the middle.

[0040] In the figure: 1. heating furnace; 2. feed pipe; 3. discharge pipe; 4. inner plate; 5. connecting shaft; 6. water wheel; 7. mixing blade; 8. lower connecting plate; 9. auxiliary plate; 10. through hole; 11. auxiliary block; 12. cam; 13. side plate; 14. force plate; 15. column; 16. connecting spring; 17. push rod; 18. scraper; 19. limit plate; 20. vertical plate; 21. connecting rod; 22. reset spring; 23. working rod; 24. first magnet; 25. guide plate; 26. movable plate; 27. knocking rod; 28. second magnet; 29. ​​auxiliary spring. DETAILED DESCRIPTION

[0041] 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.

[0042] Embodiment 1: By setting the mixing assembly, the mixing blade 7 and the auxiliary plate 9 can work, and then the heat transfer oil can be stirred deeply, that is, the heat transfer oil is finally heated evenly. Figure 1-Figure 5 As shown:

[0043] The heating furnace 1 comprises a bracket fixedly connected to the outer surface of the heating furnace 1, a feed pipe 2 is bolted to the right side of the heating furnace 1, a discharge pipe 3 is bolted to the left side of the heating furnace 1, and an inner plate 4 is fixedly connected to the inner wall of the heating furnace 1;

[0044] A connecting shaft 5 is rotatably arranged inside the inner plate 4, and a water wheel 6 is fixedly connected to the right surface of the connecting shaft 5, and a mixing assembly is arranged between the inner plate 4 and the connecting shaft 5, and the mixing assembly includes mixing blades 7 fixedly connected to the surface of the connecting shaft 5 at equal intervals;

[0045] A cleaning component is arranged between the feed pipe 2 and the connecting shaft 5, and the cleaning component includes a scraper 18 slidably arranged inside the feed pipe 2, and the surface of the scraper 18 is in contact with the inner wall of the feed pipe 2. An auxiliary component is arranged inside the feed pipe 2, and the auxiliary component includes a guide plate 25 fixedly connected to the inner wall of the feed pipe 2, and a movable plate 26 is slidably arranged on the surface of the guide plate 25, and a knocking rod 27 is fixedly connected to the surface of the movable plate 26.

[0046] The mixing assembly also includes a lower connecting plate 8 fixedly connected to the lower surface of the inner plate 4, and a column 15 is fixedly connected to the inner wall of the lower connecting plate 8, and a side plate 13 is sleeved and connected to the surface of the column 15, and an auxiliary plate 9 is fixedly connected to the side of the side plate 13.

[0047] A through hole 10 is provided on the surface of the auxiliary plate 9, and the through holes 10 are evenly spaced on the surface of the auxiliary plate 9. A force-bearing plate 14 is fixedly connected to the upper surface of the side plate 13, and the side plate 13 is symmetrically distributed about the center of the auxiliary plate 9. Auxiliary blocks 11 are fixedly connected to the front and rear sides of the auxiliary plate 9 at even intervals, and the surface of the auxiliary block 11 is inclined.

[0048] A cam 12 is fixedly connected to the surface of the connecting shaft 5, and the cam 12 corresponds one-to-one to the force-bearing plate 14. A connecting spring 16 that plays an elastic reset role is fixedly connected to the lower surface of the side plate 13, and the other side of the connecting spring 16 is fixedly connected to the inner wall of the lower connecting plate 8.

[0049] During operation, in the process of heat transfer oil circulation, it enters the heating furnace 1 through the feed pipe 2 and is discharged from the heating furnace 1 through the discharge pipe 3. When the feed pipe 2 enters the heating furnace 1, the water wheel 6 drives the connecting shaft 5 to rotate inside the inner plate 4. At this time, the mixing blade 7 rotates, and then the mixing blade 7 plays a role of mixing materials, which facilitates the uniform heating of the heat transfer oil. When the connecting shaft 5 rotates, the connecting shaft 5 drives the cam 12 to rotate synchronously, and then the cam 12 intermittently pushes the force plate 14. When the cam 12 pushes the force plate 14, the force-bearing plate 14 and the auxiliary plate 9 descend in the vertical direction (the column 15 makes the force-bearing plate 14 move only in the vertical direction), and the connecting spring 16 will be squeezed at the same time, and when the cam 12 continues to rotate until it does not push the force-bearing plate 14, the force-bearing plate 14 and the side plate 13 and the auxiliary plate 9 rise under the action of the connecting spring 16, and the above process is repeated. The auxiliary plate 9 makes a reciprocating linear motion in the vertical direction. At this time, the auxiliary plate 9 and the through hole 10 and the auxiliary block 11 play an auxiliary stirring role, so that the heat transfer oil is heated more evenly.

[0050] Embodiment 2: Different from Embodiment 1, the inner wall of the feed pipe 2 can be cleaned by the cleaning assembly so that the oil stains do not settle and remain. Figure 6-Figure 8 As shown:

[0051] The cleaning assembly also includes a limit plate 19 fixedly connected to the inner wall of the feed pipe 2, and a vertical plate 20 is slidably provided on the surface of the limit plate 19, and the limit plate 19 is "U"-shaped when viewed from the front.

[0052] The lower surface of the vertical plate 20 is fixedly connected to the upper surface of the scraper 18, and the surface of the vertical plate 20 is fixedly connected with a connecting rod 21, and the surface of the connecting rod 21 is inclined, the surface of the connecting shaft 5 is fixedly connected with a push rod 17, and the push rods 17 are distributed at equal angles on the surface of the connecting shaft 5, the surface of the vertical plate 20 is fixedly connected with a reset spring 22 which plays an elastic reset role, and the other side of the reset spring 22 is fixedly connected to the inner wall of the limit plate 19.

[0053] When the connecting shaft 5 rotates, the connecting shaft 5 will drive the push rod 17 to rotate synchronously, and then the push rod 17 will intermittently push the connecting rod 21. When the push rod 17 pushes the connecting rod 21, the connecting rod 21 and the vertical plate 20 move in the direction of squeezing the return spring 22 under the action of the limit plate 19. When the push rod 17 continues to rotate until it does not push the connecting rod 21, the connecting rod 21 and the vertical plate 20 move back under the action of the return spring 22, and the above process is repeated. At this time, the vertical plate 20 and the scraper 18 make reciprocating linear motion in the horizontal direction, and then the scraper 18 will clean the inner wall of the feed pipe 2, prevent oil from settling, and thus no oil layer will be formed, thereby ensuring the heat transfer efficiency.

[0054] Embodiment 3: Different from Embodiment 2, by providing an auxiliary component, the knocking rod 27 can intermittently hit the inner wall of the feed pipe 2, so that the feed pipe 2 is in a vibrating state, which is convenient for impurities to fall off. Figure 9-11 As shown:

[0055] The auxiliary component also includes a working rod 23 fixedly connected to the right side surface of the vertical plate 20, and the front and rear sides of the working rod 23 are fixedly connected to the first magnet 24, and the outer wall of the movable plate 26 is fixedly connected to the second magnet 28, the second magnet 28 corresponds to the first magnet 24 one by one, and the magnetic poles of the second magnet 28 and the first magnet 24 at adjacent positions are opposite.

[0056] The knocking rods 27 are evenly spaced on the surface of the movable plate 26 , and the knocking rods 27 initially fit against the inner wall of the feed pipe 2 , and an auxiliary spring 29 that plays an elastic reset role is fixedly connected to the surface of the movable plate 26 , and the other side of the auxiliary spring 29 is fixedly connected to the inner wall of the guide plate 25 .

[0057] When the vertical plate 20 makes reciprocating linear motion, it will drive the working rod 23 and the first magnet 24 to move synchronously. When the first magnet 24 is close to the second magnet 28, the movable plate 26 drives the knocking rod 27 to move to the middle position of the feed pipe 2 under the action of the mutual magnetic force (the guide plate 25 makes the movable plate 26 move only in the horizontal direction). At this time, the auxiliary spring 29 is squeezed, and when the first magnet 24 is away from the second magnet 28, the movable plate 26 moves back under the action of the auxiliary spring 29, that is, the movable plate 26 makes reciprocating linear motion in the horizontal direction, and then the movable plate 26 will drive the knocking rod 27 to hit the inner wall of the feed pipe 2 again and again, so that the feed pipe 2 is in a state of slight vibration, which can also make the oil stains better cleaned, thereby optimizing the cleaning effect.

[0058] The above is the working process of the entire device, and the contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

Claims

1. A heat-conducting oil heater for an EVA foam material internal mixer, comprising a heating furnace (1), a bracket being fixedly connected to the outer surface of the heating furnace (1), a feed pipe (2) being bolted to the right side of the heating furnace (1), a discharge pipe (3) being bolted to the left side of the heating furnace (1), and an inner plate (4) being fixedly connected to the inner wall of the heating furnace (1); Features: A connecting shaft (5) is rotatably arranged inside the inner plate (4), and a water wheel (6) is fixedly connected to the right side surface of the connecting shaft (5), and a mixing assembly is arranged between the inner plate (4) and the connecting shaft (5), and the mixing assembly includes mixing blades (7) fixedly connected to the surface of the connecting shaft (5) at equal intervals; A cleaning assembly is provided between the feed pipe (2) and the connecting shaft (5), and the cleaning assembly comprises a scraper (18) slidably arranged inside the feed pipe (2), and the surface of the scraper (18) is in contact with the inner wall of the feed pipe (2); An auxiliary component is arranged inside the feed pipe (2), and the auxiliary component includes a guide plate (25) fixedly connected to the inner wall of the feed pipe (2), a movable plate (26) is slidably arranged on the surface of the guide plate (25), and a knocking rod (27) is fixedly connected to the surface of the movable plate (26).

2. A thermal oil heater for an EVA foam material internal mixer according to claim 1, characterized in that: The mixing assembly further comprises a lower connecting plate (8) fixedly connected to the lower surface of the inner plate (4), a column (15) fixedly connected to the inner wall of the lower connecting plate (8), a side plate (13) sleeved on the surface of the column (15), and an auxiliary plate (9) fixedly connected to the side surface of the side plate (13).

3. A thermal oil heater for an EVA foam material internal mixer according to claim 2, characterized in that: The surface of the auxiliary plate (9) is provided with through holes (10), and the through holes (10) are evenly spaced on the surface of the auxiliary plate (9); the upper surface of the side plate (13) is fixedly connected to a force-bearing plate (14), and the side plate (13) is symmetrically distributed about the center of the auxiliary plate (9); and auxiliary blocks (11) are evenly spaced and fixedly connected to the front and rear sides of the auxiliary plate (9), and the surface of the auxiliary blocks (11) is inclined.

4. A thermal oil heater for an EVA foam material internal mixer according to claim 3, characterized in that: A cam (12) is fixedly connected to the surface of the connecting shaft (5), and the cam (12) corresponds one-to-one to the force-bearing plate (14); a connecting spring (16) having an elastic reset function is fixedly connected to the lower surface of the side plate (13), and the other side of the connecting spring (16) is fixedly connected to the inner wall of the lower connecting plate (8).

5. The thermal oil heater for an EVA foam material internal mixer according to claim 1, characterized in that: The cleaning component also includes a limit plate (19) fixedly connected to the inner wall of the feed pipe (2), and a vertical plate (20) is slidably provided on the surface of the limit plate (19), and the limit plate (19) is "U"-shaped when viewed from the front.

6. A thermal oil heater for an EVA foam material internal mixer according to claim 5, characterized in that: The lower surface of the vertical plate (20) is fixedly connected to the upper surface of the scraper (18), and the surface of the vertical plate (20) is fixedly connected to a connecting rod (21), and the surface of the connecting rod (21) is inclined. The surface of the connecting shaft (5) is fixedly connected to a push rod (17), and the push rods (17) are distributed at equal angles on the surface of the connecting shaft (5).

7. The thermal oil heater for an EVA foam material internal mixer according to claim 5, characterized in that: A return spring (22) having an elastic return function is fixedly connected to the surface of the vertical plate (20), and the other side of the return spring (22) is fixedly connected to the inner wall of the limit plate (19).

8. The thermal oil heater for an EVA foam material internal mixer according to claim 5, characterized in that: The auxiliary component also includes a working rod (23) fixedly connected to the right side surface of the vertical plate (20), and the front and rear sides of the working rod (23) are fixedly connected to the first magnet (24), and the outer wall of the movable plate (26) is fixedly connected to the second magnet (28).

9. A thermal oil heater for an EVA foam material internal mixer according to claim 8, characterized in that: The second magnet (28) corresponds to the first magnet (24) one by one, and the magnetic poles of the second magnet (28) and the first magnet (24) at adjacent positions are opposite.

10. The thermal oil heater for an EVA foam material internal mixer according to claim 1, characterized in that: The knocking rods (27) are evenly spaced on the surface of the movable plate (26), and the knocking rods (27) are initially in contact with the inner wall of the feed pipe (2), and an auxiliary spring (29) having an elastic reset function is fixedly connected to the surface of the movable plate (26), and the other side of the auxiliary spring (29) is fixedly connected to the inner wall of the guide plate (25).

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