A stirring device for producing EVA foam.

Abstract

This utility model belongs to the technical field of polymer material processing equipment, specifically referring to a mixing device for producing EVA foam. It includes a mixing cylinder, a base located below the mixing cylinder, with multiple upwardly extending connecting rods evenly distributed around the base, and a detachable mounting platform at the top of each connecting rod; a dual-hopper assembly including two mounting ports penetrating the mounting platform and two feed hoppers corresponding to the mounting ports, the bottoms of the feed hoppers extending inclined towards the center of the mixing cylinder; and a lifting mixing mechanism including a first motor located at the top of the mounting platform, a mixing paddle connected at one end to the first motor and the other end extending into the mixing cylinder, a lifting seat located at the top of the mounting platform, a transmission screw located within the lifting seat, a second motor for driving the transmission screw, and a transmission nut cooperating with the transmission screw, the transmission nut being fixedly connected to the first motor. This utility model provides a dual-hopper, liftable mixing shaft, enabling the mixing device to achieve efficient mixing.

Description

Technical Field

[0001] This utility model belongs to the technical field of polymer material processing equipment, and specifically refers to a stirring device for producing EVA foam. Background Technology

[0002] EVA foam is a high-performance polymer material that is widely used in footwear, packaging, sporting goods and other fields due to its lightweight, softness and elasticity. As market demand grows, optimizing its production process becomes increasingly crucial.

[0003] However, existing mixing devices used for producing EVA foam have significant drawbacks in practical applications. Most mixing devices have a fixed agitator shaft height, making it impossible to adjust according to different mixing requirements and material characteristics. This results in varying degrees of mixing at different heights within the container, making it difficult to achieve uniform mixing throughout the entire process. Furthermore, these devices have a relatively simple feeding path; materials are often added vertically from the top of the mixing container, easily accumulating in localized areas and failing to disperse sufficiently in the initial stages. This leads to material stratification, ultimately resulting in uneven mixing of the EVA foam raw materials and additives, affecting product quality and performance, and limiting further improvements in EVA foam production efficiency and quality. Utility Model Content

[0004] This invention provides a dual-hopper coordinated lifting stirring shaft, which enables the stirring device to have a high-efficiency mixing function, thereby solving the problems mentioned in the background art.

[0005] The purpose of this utility model is achieved as follows: a mixing device for producing EVA foam, including a mixing cylinder, and further comprising:

[0006] A base is located below the mixing cylinder. The base is circumferentially distributed with multiple upward-extending connecting rods, and the top of all connecting rods is provided with a detachable mounting platform.

[0007] The dual-hopper assembly includes two mounting ports that penetrate the mounting platform and two feed hoppers that are connected to the mounting ports. The bottom of the feed hoppers extends inclined toward the center of the mixing cylinder.

[0008] The lifting mixing mechanism includes a first motor located on the top of the installation platform, a mixing paddle connected at one end to the first motor and extending into the mixing cylinder at the other end, a lifting seat located on the top of the installation platform, a transmission screw located in the lifting seat, a second motor for driving the transmission screw, and a transmission nut that is threadedly engaged with the transmission screw, wherein the transmission nut is fixedly connected to the first motor.

[0009] The present invention is further configured such that multiple rollers are evenly distributed at the bottom of the base, and a pusher for driving the rollers is provided between adjacent connecting rods.

[0010] The present invention is further configured such that a limiting component is provided between the connecting rods, the limiting component comprising:

[0011] A fixing rod is provided between adjacent connecting rods;

[0012] The limiting ring has its outer circumferential surface connected to the fixing rod, and its inner circumferential surface matched with the outer circumferential surface of the mixing cylinder.

[0013] The present invention is further configured such that the lifting seat is provided with a guide rail, and the housing of the first motor is provided with a slider that cooperates with the guide rail.

[0014] The present invention is further provided that the bottom of both feed hoppers is provided with a detachable sealing sleeve.

[0015] The present invention is further configured such that the sealing sleeve includes a sleeve body that matches the bottom of the feed hopper and hanging openings on both sides of the sleeve body, and hooks are provided on both side walls of the feed hopper, and the sealing sleeve is detachably connected to the feed hopper through the hanging openings and hooks.

[0016] The present invention is further provided with an elastic buffer pad between the first motor and the mounting platform.

[0017] The present invention is further configured such that the inclination angle of the feed hopper is 30°-45°.

[0018] By adopting the above technical solution, the beneficial effects that this utility model can achieve are:

[0019] 1. By combining the inclined feeding design of the dual hopper assembly with the three-dimensional dynamic mixing of the lifting stirring mechanism, the material is driven to form turbulence in the mixing cylinder, which improves the uniformity of material mixing and solves the problem of material stratification.

[0020] 2. The second motor in the lifting stirring mechanism drives the transmission screw to vertically raise and lower the stirring paddle, which enables flexible adjustment of the stirring paddle height and improves the applicability of the stirring device.

[0021] 3. The rollers and push handles at the bottom of the base make the mixing device easy to move, meeting the needs of different work sites. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention from the first direction;

[0023] Figure 2 This is a schematic diagram of the sealing sleeve installation of this utility model;

[0024] Figure 3This is a three-dimensional structural diagram of the second direction of this utility model;

[0025] Figure 4 This is a utility model Figure 3 A magnified structural diagram of part A.

[0026] The attached diagram is labeled as follows: 1. Mixing cylinder; 2. Base; 3. Connecting rod; 4. Mounting platform; 5. Double hopper assembly; 50. Mounting port; 51. Feed hopper; 6. Lifting mixing mechanism; 60. First motor; 61. Mixing paddle; 62. Lifting seat; 63. Transmission screw; 64. Second motor; 65. Transmission nut; 7. Roller; 8. Push handle; 9. Limiting assembly; 90. Fixing rod; 91. Limiting ring; 10. Guide rail; 11. Slider; 12. Sealing sleeve; 120. Sleeve body; 121. Hanging opening; 13. Hook; 14. Elastic buffer pad. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-4 :

[0028] Example 1:

[0029] This embodiment provides a mixing device for producing EVA foam, including a mixing cylinder 1, and further comprising:

[0030] The base 2 is located below the mixing cylinder 1. The base 2 is evenly distributed with multiple upwardly extending connecting rods 3 around its circumference. All connecting rods 3 are provided with a detachable mounting platform 4 at their top.

[0031] The dual hopper assembly 5 includes two mounting ports 50 penetrating the mounting platform 4 and two feed hoppers 51 connected to the mounting ports 50 respectively. The bottom of the feed hoppers 51 extends inclined towards the center of the mixing cylinder 1.

[0032] The lifting mixing mechanism 6 includes a first motor 60 located on the top of the mounting platform 4, a mixing paddle 61 with one end connected to the first motor 60 and the other end extending into the mixing cylinder 1, a lifting seat 62 located on the top of the mounting platform 4, a transmission screw 63 located in the lifting seat 62, a second motor 64 for driving the transmission screw 63, and a transmission nut 65 threadedly engaged with the transmission screw 63. The transmission nut 65 is fixedly connected to the first motor 60.

[0033] The mixing cylinder 1 is the core container used to mix EVA raw materials and additives, providing space for the stirring process and allowing the materials to mix thoroughly. The mixing cylinder 1 is typically a hollow cylindrical structure; its shape helps the materials to circulate under the action of the stirring paddle 61, promoting mixing. Located in the middle of the entire mixing device, the mixing cylinder 1 receives the materials fed from the upper feed hopper 51 and houses the stirring paddle 61 for stirring operations. The mixing cylinder 1 is connected to the base 2 below via bolts or clamps.

[0034] The base 2 serves as the fundamental support component of the entire mixing device, providing a stable mounting foundation for the mixing cylinder 1, the dual hopper assembly 5, and the lifting mixing mechanism 6, ensuring the stability of the device during operation. The base 2 is typically a plate-like or frame-like structure with multiple upward-extending connecting rods 3 evenly distributed around its circumference. When the base 2 is a rectangular plate-like structure, the connecting rods 3 extend upwards from the four corners of the base 2. The connecting rods 3 can be connected to the base 2 by welding or bolts.

[0035] The connecting rod 3 connects the base 2 and the mounting platform 4, transferring the weight of the mounting platform 4 and the double hopper assembly 5 and lifting mixing mechanism 6 mounted on it to the base 2, while also providing a certain degree of restraint on the mixing cylinder 1. The connecting rod 3 is typically a straight rod-shaped structure, usually cylindrical or square. It extends upwards from the circumference of the base 2, connecting to the mounting platform 4 at its top and surrounding the mixing cylinder 1. The top of the connecting rod 3 can be detachably connected to the mounting platform 4 using bolts, clips, or other means, while its bottom is fixedly connected to the base 2.

[0036] The mounting platform 4 serves as the mounting carrier for the dual-hopper assembly 5 and the lifting mixing mechanism 6, facilitating the installation, disassembly, and maintenance of these components. It also provides support and fixation, ensuring stability during operation. The mounting platform 4 is typically a flat structure with mounting openings 50 on its surface corresponding to the two feed hoppers 51 in the dual-hopper assembly 5.

[0037] The dual hopper assembly 5 includes an installation port 50 and a feed hopper 51, which are used to feed EVA raw materials and additives, respectively. The inclined design of the feed hopper 51 allows the materials to begin initial mixing when they enter the mixing cylinder 1, thereby improving the mixing efficiency.

[0038] The mounting port 50 provides an installation position for the feed hopper 51, ensuring a secure connection between the feed hopper 51 and the installation platform 4, and guaranteeing that materials can smoothly pass through the feed hopper 51 into the mixing cylinder 1. The shape of the mounting port 50 matches the upper opening of the feed hopper 51, penetrates the installation platform 4, and corresponds to the position of the feed hopper 51 on the installation platform 4. The number of mounting ports 50 is the same as that of the feed hopper 51, with two mounting ports 50 distributed on the installation platform 4. The mounting ports 50 and the feed hopper 51 can be fixed by welding, bolting, or other methods, forming an integral part of the installation platform 4.

[0039] The feed hopper 51 is used to store and dispense materials such as EVA raw materials and additives. Its inclined design guides the materials to the central area of ​​the mixing cylinder 1, achieving preliminary mixing and efficient dispensing. The feed hopper 51 is funnel-shaped, with a large opening at the top for easy feeding, gradually narrowing at the bottom and extending inclined towards the center of the mixing cylinder 1. This causes the materials to concentrate in the central area upon entering the mixing cylinder 1, achieving preliminary mixing of different materials. Two feed hoppers 51 are designed; one can dispense EVA raw materials, and the other can dispense additives and other materials, thus improving the uniformity of mixing. Furthermore, both feed hoppers 51 can dispense EVA raw materials, thereby increasing the dispensing efficiency of EVA raw materials.

[0040] The lifting stirring mechanism 6 drives the stirring paddle 61 to rotate via the first motor 60 to stir the material; at the same time, the second motor 64 drives the transmission screw 63 to enable the stirring paddle 61 to rise and fall vertically, thereby achieving three-dimensional dynamic stirring and improving the uniformity of material mixing.

[0041] The first motor 60 serves as the power source for the rotation of the stirring paddle 61. It drives the stirring paddle 61 to rotate via its output shaft, thereby stirring the material inside the mixing cylinder 1. The output shaft of the first motor 60 and the stirring paddle 61 can be fixed together by means of key connection, pin connection, or other methods. The housing of the first motor 60 can be fixedly connected to the transmission nut 65 by means of bolts or other methods. When it is not necessary to raise or lower the stirring shaft, the housing of the first motor 60 can be fixed to the mounting platform 4 by bolts.

[0042] The lifting seat 62 provides an installation and support structure for components such as the transmission screw 63. The lifting seat 62 is typically a block or frame structure with internal holes or slots for mounting the transmission screw 63. The lifting seat 62 can be fixedly connected to the mounting platform 4 by bolts or other means; the internal transmission screw 63 can be mounted inside the lifting seat 62 by bearings or other components.

[0043] Driven by the second motor 64, the transmission screw 63 rotates, converting the rotational motion into linear motion through its threaded engagement with the transmission nut 65, thereby driving the first motor 60 and the agitator 61 to rise and fall vertically. The transmission screw 63 is located inside the lifting base 62, with one end connected to the second motor 64 via a coupling or other means, and the other end supported on the lifting base 62 by bearings or other components, and threadedly engaged with the transmission nut 65.

[0044] The second motor 64 serves as the power source for the rotation of the lead screw 63, driving the lead screw 63 to rotate, thereby realizing the vertical lifting and lowering movement of the stirring paddle 61. The output shaft of the second motor 64 and the lead screw 63 can be connected by couplings or other means to ensure the stability of power transmission; the housing of the second motor 64 and the lifting base 62 can be fixedly connected by bolts or other means.

[0045] The transmission nut 65 is threadedly engaged with the transmission screw 63, converting the rotational motion of the transmission screw 63 into its own linear motion, thereby driving the first motor 60 and the stirring paddle 61, which are fixedly connected to it, to rise and fall vertically. The transmission nut 65 has a nut-shaped structure with internal threads that match those of the transmission screw 63, and can be externally fixedly connected to the housing of the first motor 60 by bolts or other means.

[0046] When the mixing device is working, EVA raw materials and additives are first fed into the two feed hoppers 51 of the double hopper assembly 5. Since the bottom of the feed hopper 51 extends inclined towards the center of the mixing cylinder 1, the materials slide down the inclined feed hopper 51 under the action of gravity, and when they enter the mixing cylinder 1, they will concentrate in the central area of ​​the mixing cylinder 1, thus achieving preliminary mixing.

[0047] The first motor 60 is started, and its output shaft drives the stirring paddle 61 to rotate, stirring the material in the mixing cylinder 1. Simultaneously, the second motor 64 is started according to actual stirring requirements. The second motor 64 drives the transmission screw 63 to rotate. The transmission screw 63 is threadedly engaged with the transmission nut 65. As the transmission screw 63 rotates, the transmission nut 65 moves linearly along it. Since the transmission nut 65 is fixedly connected to the housing of the first motor 60, its linear movement causes the first motor 60 and the stirring paddle 61 to rise and fall vertically.

[0048] Under the combined action of the rotating and vertically lifting action of the stirring paddle 61, the material forms a three-dimensional dynamic mixing process in the mixing cylinder 1. It is not only stirred and mixed by the stirring paddle 61 in the horizontal direction, but also continuously turned over in the vertical direction due to the lifting action of the stirring paddle 61, so as to fully mix the material and improve the mixing uniformity.

[0049] Example 2:

[0050] This embodiment provides a stirring device for producing EVA foam, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0051] The base 2 has multiple rollers 7 evenly distributed at its bottom, and a pusher 8 for driving the rollers 7 is provided between adjacent connecting rods 3.

[0052] Multiple rollers 7 are evenly distributed at the bottom of the base 2. The rollers 7 are usually circular and can be securely connected to the bottom of the base 2 by bolts, ensuring that they will not easily fall off when bearing the overall weight of the mixing device. The design of the rollers 7 makes the mixing device mobile and can be easily moved between different work sites.

[0053] A pusher 8, typically rod-shaped, is installed between adjacent connecting rods 3 to drive rollers 7. Both ends of the pusher 8 are fixed to the connecting rods 3 via welding or bolts, creating a structure that is easy for operators to grip and apply force. The pusher 8 and rollers 7 work together; the operator simply grips the pusher 8 and applies pushing force, which, through the rolling of the rollers 7, moves the mixing device. This satisfies the need for positional adjustments of the mixing device in different production environments, greatly improving the flexibility and convenience of equipment use.

[0054] Example 3:

[0055] This embodiment provides a stirring device for producing EVA foam, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0056] A limiting component 9 is provided between the connecting rods 3. The limiting component 9 includes:

[0057] A fixing rod 90 is disposed between adjacent connecting rods 3;

[0058] The limiting ring 91 has its outer circumferential surface connected to the fixing rod 90, and its inner circumferential surface matched with the outer circumferential surface of the mixing cylinder 1.

[0059] The limiting component 9 is used to restrict the radial movement of the mixing cylinder 1 during the mixing process, ensuring the stability of the mixing cylinder 1 during operation, avoiding uneven mixing of materials due to shaking, and reducing wear caused by shaking, thus extending the service life of the equipment. The limiting component 9 consists of a fixed rod 90 and a limiting ring 91, which work together to limit the movement of the mixing cylinder 1.

[0060] The fixing rod 90 serves as a support component of the limiting assembly 9, connecting adjacent connecting rods 3 and providing an installation base for the limiting ring 91. It transmits the force of the limiting ring 91 to the connecting rods 3 and the base 2, ensuring the limiting effect of the limiting ring 91 on the mixing cylinder 1. The fixing rod 90 is generally a rod-shaped structure, which can be cylindrical or square. It is positioned between adjacent connecting rods 3 and evenly distributed in the circumferential direction of the base 2, forming a ring-shaped support structure for the mixing cylinder 1. The two ends of the fixing rod 90 are fixed to the adjacent connecting rods 3 by welding, bolts, or other methods.

[0061] The limiting ring 91 is used to radially limit the mixing cylinder 1. By tightly fitting against the outer circumferential surface of the mixing cylinder 1, it restricts the radial movement of the mixing cylinder 1 during the mixing process, keeping the mixing cylinder 1 stable and ensuring the uniformity of material mixing and the mixing effect. The limiting ring 91 is generally annular in structure, with its inner circumferential surface matching the outer circumferential surface of the mixing cylinder 1, usually circular, to ensure uniform limiting of the mixing cylinder 1. The outer circumferential surface of the limiting ring 91 and the fixing rod 90 can be fixed by welding, bolting, or other methods to ensure that the limiting ring 91 will not shift during the mixing process and always maintains its limiting function on the mixing cylinder 1.

[0062] When the mixing device is working, the mixing blade 61 inside the mixing cylinder 1 rotates and mixes the material under the drive of the first motor 60, and can also move vertically up and down under the action of the second motor 64. This series of operations will cause the mixing cylinder 1 to be subjected to forces in different directions, which can easily cause radial shaking. At this time, the limiting component 9 comes into play. The fixing rod 90 connects to the adjacent connecting rod 3 to form a stable annular support frame. The limiting ring 91 is installed on the fixing rod 90 and fits tightly against the outer circumference of the mixing cylinder 1. When the mixing cylinder 1 is subjected to radial force and attempts to shake, the limiting ring 91 will block the radial movement of the mixing cylinder 1 and limit the mixing cylinder 1 to a certain position range. The force of the mixing cylinder 1 on the limiting ring 91 is transmitted to the connecting rod 3 and the base 2 through the fixing rod 90. The base 2 bears these forces, thereby ensuring that the mixing cylinder 1 remains stable during the mixing process and avoiding the impact of shaking on the material mixing effect.

[0063] Example 4:

[0064] This embodiment provides a stirring device for producing EVA foam, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0065] The lifting seat 62 is provided with a guide rail 10, and the housing of the first motor 60 is provided with a slider 11 that cooperates with the guide rail 10.

[0066] The guide rail 10 on the lifting seat 62 is long and narrow, usually with a T-shaped or dovetail-shaped cross-section. It can be securely installed on the lifting seat 62 by welding or bolting, providing a guide path for the movement of the first motor 60.

[0067] The slider 11 on the housing of the first motor 60 is shaped to match the guide rail 10 and is also securely installed on the motor housing by welding or bolting. The two work together so that when the second motor 64 drives the transmission screw 63 to raise and lower the first motor 60, the slider 11 can slide precisely along the guide rail 10. This ensures the stability and accuracy of the vertical raising and lowering of the first motor 60 and the stirring paddle 61, preventing deviation or shaking, and allowing the stirring paddle 61 to smoothly stir materials at different heights. Furthermore, this guiding structure effectively disperses the force during the raising and lowering process, reducing friction and wear between the motor and other components, improving the reliability and service life of the lifting stirring mechanism 6, and thus ensuring the efficient and stable operation of the entire stirring device.

[0068] Example 5:

[0069] This embodiment provides a stirring device for producing EVA foam, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0070] Both feed hoppers 51 are provided with detachable sealing sleeves 12 at their bottoms.

[0071] A detachable sealing sleeve 12 is provided at the bottom of the two feed hoppers 51. The sealing sleeve 12 is usually designed as a circular or square cover structure that matches the bottom opening of the feed hopper 51. The material is mostly elastic rubber or soft plastic to ensure good sealing performance. The detachable connection can take various forms. For example, it can be designed to achieve quick adsorption and separation through a magnetic structure. A magnetic strip is embedded in the bottom edge of the feed hopper 51, and an iron sheet or magnet is set at the corresponding position of the sealing sleeve 12. When adsorbed, it fits tightly to prevent material leakage. Alternatively, it can be designed as a snap-fit ​​connection. An annular groove is set on the outer periphery of the bottom of the feed hopper 51, and the edge of the sealing sleeve 12 is designed with elastic claws. Pressing the claws makes them snap into the groove to achieve fixation. When disassembling, simply pull the claws to separate. This design can effectively seal the feed hopper 51 when the equipment is idle, preventing dust and foreign objects from entering and contaminating the material. It can also be quickly disassembled when cleaning or material replacement is needed, making it easy to thoroughly clean the inside of the feed hopper 51, reduce material residue, avoid cross-contamination between different batches of material, and facilitate the inspection of whether there is wear or blockage at the bottom of the feed hopper 51, ensuring the smoothness of subsequent material feeding and mixing quality.

[0072] Example 6:

[0073] This embodiment provides a stirring device for producing EVA foam, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0074] The sealing sleeve 12 includes a sleeve body 120 that matches the bottom of the feed hopper 51 and hanging openings 121 on both sides of the sleeve body 120. The side walls of the feed hopper 51 are provided with hooks 13. The sealing sleeve 12 is detachably connected to the feed hopper 51 through the hanging openings 121 and the hooks 13.

[0075] The sleeve body 120 of the sealing sleeve 12 is designed to fit the shape of the bottom opening of the feed hopper 51, usually in the form of a circular or square ring, and is made of rubber or plastic with a certain degree of elasticity to ensure a tight fit with the bottom of the feed hopper 51. The hanging openings 121 on both sides of the sleeve body 120 are U-shaped or C-shaped grooves, and the width of the grooves is adapted to the thickness of the hooks 13 on the side wall of the feed hopper 51; the hooks 13 are L-shaped or barbed and can be fixed to the outer surface of the side wall of the feed hopper 51 by welding or bolts.

[0076] When the sealing sleeve 12 needs to be installed, align the sleeve body 120 with the bottom of the feed hopper 51, slide the hook 121 along the horizontal part of the hook 13 until the vertical part of the hook 13 is engaged with the bottom of the hook 121 groove, and use the barbed structure of the hook 13 and the elastic deformation of the sleeve body 120 to achieve the snap-fit ​​connection. This design makes the sealing sleeve 12 form a reliable sealing barrier at the bottom of the feed hopper 51, effectively preventing dust, foreign objects from entering or material leakage; at the same time, the operator only needs to pull the sleeve body 120 outward to slide the hook 13 out from the bottom of the hook 121 groove for quick disassembly, which is convenient for cleaning or replacing materials inside the feed hopper 51, ensuring the sealing of the equipment and improving the convenience of operation.

[0077] Example 7:

[0078] This embodiment provides a stirring device for producing EVA foam, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0079] An elastic buffer pad 14 is provided between the first motor 60 and the mounting platform 4.

[0080] The elastic buffer pad 14, installed between the first motor 60 and the mounting platform 4, is typically designed as a sheet-like structure that matches the shape of the contact area between the base of the first motor 60 and the mounting platform 4. Common shapes include circular, square, and annular, and it can be flexibly adjusted according to the actual installation space and stress requirements. Its material is usually rubber or silicone with good elasticity and shock absorption properties, capable of elastic deformation under stress to effectively absorb impact. The elastic buffer pad 14 is mainly connected by adhesive bonding or bolt fixing.

[0081] Under this design, when the first motor 60 moves due to the drive of the transmission screw 63 during the lifting process, the elastic buffer pad 14 can effectively buffer the vibration caused by the motor operation and lifting through its own elastic deformation, avoid the motor directly hitting the top of the mounting platform 4, reduce rigid collisions and wear between equipment components, protect the structural integrity of the first motor 60 and the mounting platform 4, reduce the noise generated during the stirring process, ensure the stability and reliability of the stirring device operation, and extend the service life of the equipment.

[0082] Example 8:

[0083] This embodiment provides a stirring device for producing EVA foam, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0084] The inclination angle of the feed hopper 51 is 30°-45°.

[0085] In this embodiment, the tilt angle of the feed hopper 51 is set between 30° and 45°, based on a dual consideration of material flow characteristics and mixing efficiency. Within this angle range, the feed hopper 51 is moderately tilted, which ensures that materials such as EVA raw materials and additives can smoothly slide down at a suitable flow rate under their own gravity, avoiding material accumulation and slow flow due to an angle that is too small, or material sliding down too fast and difficult to control due to an angle that is too large. At the same time, this tilt angle allows the material to be precisely guided to the central area inside the mixing cylinder 1 when it enters the mixing cylinder, promoting the initial mixing of different materials during the falling process. This lays a good foundation for the subsequent mixing operation of the stirring paddle 61, effectively improving the initial efficiency of material mixing, and ensuring that EVA raw materials and additives are mixed more quickly and evenly in the mixing cylinder 1, thereby improving the overall mixing effect and production efficiency.

[0086] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A mixing device for producing EVA foam, comprising a mixing cylinder (1), characterized in that... It also includes: The base (2) is located below the mixing cylinder (1). The base (2) is evenly distributed with multiple upward-extending connecting rods (3) around its circumference. All connecting rods (3) are provided with a detachable mounting platform (4) at their top. The dual hopper assembly (5) includes two mounting ports (50) penetrating the mounting platform (4) and two feed hoppers (51) corresponding to the mounting ports (50), the bottom of the feed hoppers (51) extending inclined towards the center of the mixing cylinder (1); The lifting mixing mechanism (6) includes a first motor (60) located on the top of the installation platform (4), a mixing paddle (61) with one end connected to the first motor (60) and the other end extending into the mixing cylinder (1), a lifting seat (62) located on the top of the installation platform (4), a transmission screw (63) located in the lifting seat (62), a second motor (64) for driving the transmission screw (63), and a transmission nut (65) threadedly engaged with the transmission screw (63), wherein the transmission nut (65) is fixedly connected to the first motor (60).

2. The stirring device for producing EVA foam according to claim 1, characterized in that, The base (2) has multiple rollers (7) evenly distributed at its bottom, and a pusher (8) for driving the rollers (7) is provided between adjacent connecting rods (3).

3. The stirring device for producing EVA foam according to claim 1, characterized in that, A limiting component (9) is provided between the connecting rods (3), and the limiting component (9) includes: A fixing rod (90) is provided between adjacent connecting rods (3); The limiting ring (91) has its outer circumferential surface connected to the fixing rod (90), and its inner circumferential surface matched with the outer circumferential surface of the mixing cylinder (1).

4. The stirring device for producing EVA foam according to claim 1, characterized in that, The lifting seat (62) is provided with a guide rail (10), and the housing of the first motor (60) is provided with a slider (11) that cooperates with the guide rail (10).

5. The stirring device for producing EVA foam according to claim 1, characterized in that, Both feed hoppers (51) are provided with detachable sealing sleeves (12) at their bottoms.

6. A stirring device for producing EVA foam according to claim 5, characterized in that, The sealing sleeve (12) includes a sleeve body (120) that matches the bottom of the feed hopper (51) and hanging openings (121) on both sides of the sleeve body (120). The side walls of the feed hopper (51) are provided with hooks (13). The sealing sleeve (12) is detachably connected to the feed hopper (51) through the hanging openings (121) and the hooks (13).

7. A stirring device for producing EVA foam according to claim 1, characterized in that, An elastic buffer pad (14) is provided between the first motor (60) and the mounting platform (4).

8. A stirring device for producing EVA foam according to claim 1, characterized in that, The inclination angle of the feed hopper (51) is 30°-45°.

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