A heating device for a kneader

Abstract

The application belongs to the technical field of kneaders, and discloses a heating device for a kneader, which comprises an equipment base, a mixing box body fixedly installed on the top of the equipment base, a heating plate inlaidly installed on the inner side walls of the two sides and the bottom of the mixing box body and used for heating materials, a stirring rod symmetrically and rotatably installed in the mixing box body, with one end of the stirring rod extending to the outside of the mixing box body and a rotating gear being sleeved on the outer side wall of the stirring rod, a heating assembly installed on the outer side wall of the mixing box body and used for heating the stirring rod, a driving assembly arranged on the top of the equipment base and used for driving the stirring rod to rotate, and a crushing assembly arranged on the top of the mixing box body and used for crushing materials to be mixed. The heating plate is used for globally heating the inside of the mixing box body, and the heating assembly is used for synchronously conducting heat to the stirring rod, so that the temperature field uniformity is greatly improved, and the material mixing and dispersing efficiency is significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of kneading machine technology, and in particular to a heating device for a kneading machine. Background Technology

[0002] As a core piece of equipment for processing high-viscosity, elasto-plastic materials, kneaders are widely used in key fields such as rubber, plastics, resins, food, and pharmaceuticals due to their high adaptability to processes such as kneading, mixing, vulcanization, and polymerization. They are especially suitable for high-toughness, difficult-to-disperse materials such as raw rubber, resin masterbatch, and pharmaceutical pastes, enabling precise process control and homogenization. They are an important piece of equipment in the modern materials processing and precision manufacturing industry chain.

[0003] During the operation of a kneader, the performance of the heating system directly determines the temperature field distribution of the material, thus affecting the material's physicochemical state (such as melt density, flowability, and reactivity) and the final mixing and dispersion effect. Currently, most mainstream kneader heating solutions in the industry employ a single-dimensional heating structure. For example, the technology disclosed in patent application number CN202420922854.4 heats the material solely through heat conduction from the chamber walls by installing heating strips inside the chamber. While this design can meet basic heating requirements, it has significant technical drawbacks in practical applications: On the one hand, in single-wall heating mode, heat needs to be transferred gradually from the outside of the chamber to the material inside. Due to the low thermal conductivity of high-viscosity materials, the heat transfer efficiency inside the material is extremely low, easily forming a temperature gradient of "overheated outer layer and low-temperature inner layer". For example, in the rubber mixing process, the rubber material near the chamber wall may have reached the vulcanization temperature, while the material in the central area is still in a low-temperature solid state, resulting in uneven softening of the material. This not only affects the material flowability during mixing and shearing, but may also cause scorching due to local overheating, reducing product quality.

[0004] On the other hand, existing solutions lack a synchronous heating design for the stirring rod. As the core component that directly contacts the material and achieves shear mixing, the temperature difference between the stirring rod's surface and the material further exacerbates localized temperature unevenness. When the low-temperature stirring rod comes into contact with material near the high-temperature chamber wall, the material's heat transfers to the stirring rod, causing a sudden drop in temperature in the contact area, forming a cold spot. Meanwhile, the material far from the chamber wall remains at a low temperature because it cannot obtain heat in time, forming a low-temperature zone. This multi-regional temperature difference makes it difficult for the material to reach a uniform melting or softening state, significantly prolonging the mixing and dispersion time, reducing production efficiency, and potentially leading to uneven mixing, component stratification, and performance fluctuations. This makes it difficult to meet the stringent requirements for material homogenization in high-precision manufacturing scenarios (such as medical polymer materials and high-end resin composite materials).

[0005] Furthermore, for lumpy or large-particle materials such as solid resin blocks and rubber granules, existing kneaders typically require pretreatment equipment to crush the materials to a suitable particle size before mixing, which increases the process flow and equipment investment costs. If lumpy materials are directly added, it will not only increase the load on the stirring rod, leading to higher equipment energy consumption and accelerated wear of parts, but also further prolong the heating and mixing cycle due to the small contact area between the material and the heat source, thus restricting the improvement of production efficiency.

[0006] In summary, the current kneader heating devices' shortcomings in temperature field uniformity, heating dimension integrity, and material pretreatment adaptability have become key bottlenecks restricting the processing efficiency and product quality of high-viscosity, elasto-plastic materials. There is an urgent need to propose a new type of heating device that can achieve uniform heating across the entire area and simultaneously improve mixing efficiency to meet the industry's demand for high-precision and high-efficiency material processing. Utility Model Content

[0007] To address the aforementioned problems, this utility model provides a heating device for a kneading machine.

[0008] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a heating device for a kneading machine, comprising: Equipment base, on top of which a mixing chamber is fixedly mounted; Heating plates are embedded in the inner walls of both sides and the bottom of the mixing chamber for heating the materials. A stirring rod is symmetrically rotated and installed inside the mixing chamber, with one end extending to the outside of the mixing chamber, and a rotating gear is sleeved on the outer side wall; A heating assembly, installed on the outer wall of the mixing chamber, is used to heat the stirring rod; A drive assembly, located on top of the equipment base, is used to drive the stirring rod to rotate; a crushing assembly, located on top of the mixing chamber, is used to crush the materials to be mixed.

[0009] By adopting the above technical solution.

[0010] Furthermore, the heating assembly includes a support rod fixedly installed on the outer wall of the mixing chamber, and a stabilizing seat is fixedly connected to one end of the support rod.

[0011] By adopting the above technical solution, the heating plate can heat the entire interior of the mixing chamber, and at the same time, the heating components can simultaneously conduct heat to the stirring rod.

[0012] Furthermore, a pair of mounting rods are symmetrically fixed inside the stabilizer, and a heating tube is fixedly mounted on the end of the mounting rod away from the stabilizer.

[0013] By adopting the above technical solution, the heating element can be positioned using the mounting rod.

[0014] Furthermore, the stirring rod has a cavity inside, and one end of it extending to the outside of the mixing box has a through hole communicating with the cavity. The mounting rod passes through the through hole, and the heating tube is located in the cavity.

[0015] By adopting the above technical solution, the heating tube can be located inside the stirring rod to heat the stirring rod.

[0016] Furthermore, the drive assembly includes a motor support base and a drive motor. The motor support base is fixed to the top of the equipment base, and the drive motor is detachably fixed to the motor support base by bolts. The output shaft of the drive motor is connected to one of the stirring rods in a transmission connection.

[0017] By adopting the above technical solution, one of the stirring rods can be driven to rotate when the drive motor is working.

[0018] Furthermore, the pulverizing assembly includes a pulverizing chamber and a pair of pulverizing rods, the pulverizing chamber being positioned above the mixing chamber, and the pulverizing rods being symmetrically rotatably assembled within the pulverizing chamber.

[0019] By adopting the above technical solution, the crushing rod can rotate inside the crushing chamber.

[0020] Furthermore, a crushing motor is fixedly installed on the outer wall of the crushing box, and the output shaft of the crushing motor is fixed to the crushing rod.

[0021] By adopting the above technical solution, the drive motor can be used in conjunction with the crusher.

[0022] Furthermore, support plates are fixedly connected to both outer walls of the crushing chamber, and the end of the support plate away from the crushing chamber is fixed to the top of the equipment base.

[0023] By adopting the above technical solution, the crushing box can be supported and positioned by the support plate.

[0024] In summary, this utility model has the following beneficial effects: It adopts a dual heating structure combining a heating plate and a heating component. On the one hand, the heating plate conducts heat throughout the mixing chamber, achieving stable overall heating of the materials inside. On the other hand, the heating component synchronously heats the stirring rod, transforming the stirring rod itself into a heat source and directly contacting the materials for heat transfer. This effectively eliminates localized temperature differences that are easily generated under traditional single heating methods, significantly improving the uniformity of material heating. For high-viscosity and elastic-plastic materials such as granules and lumps, the pulverizing component integrated at the top of the device can pre-pulverize the materials before they enter the mixing chamber, refining them into uniformly sized particles. The refined materials are more easily dispersed under the shearing action of the stirring rod, significantly improving the mixing efficiency and homogenization degree of the materials. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a top view of the hybrid housing of this utility model; Figure 3 This is a schematic diagram of the installation of the rotating gear in this utility model; Figure 4 This is a cross-sectional structural diagram of the mixing box in this utility model; Figure 5 This is an exploded structural diagram of the heating component and stirring rod in this utility model; In the diagram: 1. Equipment base; 2. Mixing chamber; 3. Heating plate; 4. Stirring rod; 5. Rotating gear; 6. Heating assembly; 601. Supporting diagonal rod; 602. Stabilizing seat; 603. Mounting rod; 604. Heating tube; 7. Drive assembly; 701. Motor support seat; 702. Drive motor; 8. Crushing assembly; 801. Crushing chamber; 802. Crushing rod; 803. Crushing motor; 804. Support plate. Detailed Implementation

[0026] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] like Figures 1-5As shown in the figure, this application discloses a heating device for a kneader, including a base 1, a mixing chamber 2 fixedly installed on the top of the base 1; a heating plate 3, embedded in the inner sidewalls of both sides and the bottom of the mixing chamber 2, for heating the material; a stirring rod 4, symmetrically rotated and installed inside the mixing chamber 2, with one end extending to the outside of the mixing chamber 2, and a rotating gear 5 sleeved on the outer side wall; a heating assembly 6, installed on the outer side wall of the mixing chamber 2, for heating the stirring rod 4; a driving assembly 7, disposed on the top of the base 1, for driving the stirring rod 4 to rotate; and a crushing assembly 8, disposed on the top of the mixing chamber 2, for crushing the material to be mixed.

[0028] In use, granular or lumpy high-viscosity materials are first fed into the crushing component 8 at the top of the mixing chamber 2. After the crushing component 8 is activated, it pre-crushes the material, refining it into small particles with uniform particle size. This increases the contact area between the material and the heat source. Then, the crushed material falls into the mixing chamber 2, and the drive component 7 drives the two stirring rods 4 to rotate synchronously, shearing and mixing the material. At the same time, the heating plates 3 on both sides and the bottom of the mixing chamber 2 start working, heating the entire space inside the chamber, allowing the material to absorb heat from the outside. Meanwhile, the heating component 6 simultaneously heats the stirring rods. 4. Heating makes the stirring rod 4 itself a heat source, directly contacting the material for heat transfer during the stirring process. The combination of two heating methods ensures that the material is heated evenly from the inside out and from the periphery to the center, avoiding localized excessively low or high temperatures. In this way, the refined material can quickly achieve homogenization and mixing under the dual effects of uniform heating and strong stirring. This not only shortens the mixing time but also avoids problems such as insufficient material reaction or stratification caused by uneven heating. It is particularly suitable for processing elasto-plastic materials such as rubber and resin, improving production efficiency and ensuring product quality.

[0029] The heating assembly 6 includes a support rod 601 fixedly installed on the outer wall of the mixing chamber 2. A stabilizing seat 602 is fixedly connected to one end of the support rod 601. A pair of mounting rods 603 are symmetrically fixed inside the stabilizing seat 602. A heating tube 604 is fixedly assembled at the end of the mounting rod 603 away from the stabilizing seat 602. A cavity is opened inside the stirring rod 4, and a through hole communicating with the cavity is opened at the end of the stirring rod 4 extending to the outside of the mixing chamber 2. The mounting rod 603 passes through the through hole, and the heating tube 604 is located in the cavity.

[0030] In use, the heating component 6 works synchronously with the entire device. When the mixing chamber 2 starts operating, the heating tube 604 in the heating component 6 is energized and heats up. The heat is transferred to the surroundings through its own metal shell. Since the heating tube 604 is fixed to the end of the mounting rod 603, and the entire mounting rod 603 passes through the through hole of the stirring rod 4, the heating tube 604 is located in the cavity inside the stirring rod 4. Therefore, the heat can be directly conducted to the inner wall of the stirring rod 4, allowing the stirring rod 4 to heat up from the inside. At this time, when the stirring rod 4 rotates under the drive component 7, it has already been heated to the set temperature. During the rotation, it will come into full contact with the material, mixing the material through stirring and shearing, and acting as a "mobile heat source". The heating element 604 transfers heat to every part of the material it comes into contact with, while the mounting rod 603, the stabilizing seat 602, and the supporting inclined rod 601 serve to fix it in place. The supporting inclined rod 601 is firmly connected to the outer wall of the mixing chamber 2, and the stabilizing seat 602 ensures that the positions of the two mounting rods 603 remain unchanged. In this way, even if the stirring rod 4 rotates at high speed, the heating tube 604 can always remain in the center of the cavity, ensuring stable heating. Heating is done directly inside the stirring rod 4 through the heating tube 604, which has a short heat transfer path and high efficiency, allowing the stirring rod 4 to heat up quickly and maintain a stable temperature. At the same time, when the stirring rod 4 rotates, it can evenly distribute heat to all areas of the material. Combined with the heating plate 3 of the mixing chamber 2 heating from the outside, it forms a "double-pronged" heating effect, which greatly reduces the local temperature difference of the material, makes the high viscosity material heat more evenly, and makes it easier to soften and disperse during mixing, ultimately improving the overall mixing quality and efficiency.

[0031] The drive assembly 7 includes a motor support base and a drive motor 702. The motor support base is fixed to the top of the equipment base 1, and the drive motor 702 is detachably fixed to the motor support base by bolts. The output shaft of the drive motor 702 is connected to one of the stirring rods 4.

[0032] During use, first check the drive assembly 7 according to the mixing requirements: The motor support base, which is pre-fixed to the top of the equipment base 1, provides stable support for the drive motor 702 to prevent shaking during operation. The drive motor 702 is detachably mounted on the support base with bolts. Before installation, the motor position can be adjusted to ensure that its output shaft is precisely aligned with one of the stirring rods 4. After alignment, tighten the bolts to fix it. During subsequent maintenance, the motor can be quickly removed by removing the bolts, making the operation convenient. After starting the device, the drive motor 702 is powered on and its output shaft directly transmits power to the connected stirring rod 4, driving the stirring rod 4. First, the two stirring rods 4 rotate. Then, because the rotating gears 5 sleeved on the outer walls of the two stirring rods 4 mesh with each other, when the first stirring rod 4 rotates, it will drive the other stirring rod 4 to rotate synchronously in the opposite direction through gear meshing. This causes the two stirring rods 4 to form opposing shear forces in the mixing chamber 2, which fully stirs and mixes the high-viscosity resin, plastic particles and other materials in the chamber, avoiding clumping and mixing dead corners. Throughout the process, the stability of the motor support base ensures that the output power of the drive motor 702 does not deviate, making the power transmission stable and the stirring rod 4 rotate at a uniform speed. The detachable bolt connection improves the flexibility of motor installation and maintenance to reduce downtime maintenance time.

[0033] The crushing assembly 8 includes a crushing chamber 801 and a pair of crushing rods 802. The crushing chamber 801 is located above the mixing chamber 2. The crushing rods 802 are symmetrically rotated and assembled inside the crushing chamber 801. A crushing motor 803 is fixedly installed on the outer wall of the crushing chamber 801. The output shaft of the crushing motor 803 is fixed to the crushing rods 802. Support plates 804 are fixedly connected to both outer walls of the crushing chamber 801. The end of the support plate 804 away from the crushing chamber 801 is fixed to the top of the equipment base 1.

[0034] In use, granular or blocky materials to be mixed, such as blocky resin or large granular plastic, are fed into the feed port of the crushing chamber 801. After the crushing motor 803 is started, its output shaft directly drives the connected crushing rod 802 to rotate. The two crushing rods 802, which are symmetrically assembled in the crushing chamber 801, achieve synchronous reverse rotation through meshing or linkage structure, which shears and refines the input materials to form small particles with uniform particle size. The crushed small particles fall directly into the mixing chamber 2 below through the discharge port at the bottom of the crushing chamber 801.

[0035] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A heating device for a kneading machine, characterized in that, include: Equipment base (1), on the top of which a mixing box (2) is fixedly installed; Heating plates (3) are embedded in the inner walls of both sides and the bottom of the mixing box (2) for heating the materials; The stirring rod (4) is symmetrically rotated and installed inside the mixing box (2), with one end extending to the outside of the mixing box (2), and a rotating gear (5) is sleeved on the outer side wall. A heating assembly (6) is installed on the outer wall of the mixing chamber (2) for heating the stirring rod (4); A drive assembly (7) is located on the top of the equipment base (1) and is used to drive the stirring rod (4) to rotate; a crushing assembly (8) is located on the top of the mixing box (2) and is used to crush the materials to be mixed.

2. The heating device for a kneader according to claim 1, characterized in that: The heating assembly (6) includes a support rod (601) fixedly installed on the outer wall of the mixing box (2), and a stabilizing seat (602) is fixedly connected to one end of the support rod (601).

3. The heating device for a kneader according to claim 2, characterized in that: A pair of mounting rods (603) are symmetrically fixed inside the stabilizer (602), and a heating tube (604) is fixedly mounted on the end of the mounting rod (603) away from the stabilizer (602).

4. A heating device for a kneader according to claim 3, characterized in that: The stirring rod (4) has a cavity inside, and one end of it extending to the outside of the mixing box (2) has a through hole communicating with the cavity. The mounting rod (603) passes through the through hole, and the heating tube (604) is located in the cavity.

5. A heating device for a kneader according to claim 1, characterized in that: The drive assembly (7) includes a motor support base and a drive motor (702). The motor support base is fixed to the top of the equipment base (1). The drive motor (702) is detachably fixed to the motor support base by bolts, and the output shaft of the drive motor (702) is connected to one of the stirring rods (4) in a transmission connection.

6. A heating device for a kneader according to claim 1, characterized in that: The crushing assembly (8) includes a crushing box (801) and a pair of crushing rods (802). The crushing box (801) is located above the mixing box (2), and the crushing rods (802) are symmetrically rotated and assembled inside the crushing box (801).

7. A heating device for a kneader according to claim 6, characterized in that: A crushing motor (803) is fixedly installed on the outer wall of the crushing box (801), and the output shaft of the crushing motor (803) is fixed to the crushing rod (802).

8. A heating device for a kneader according to claim 7, characterized in that: Both sides of the crushing chamber (801) are fixedly connected to support plates (804), and the end of the support plate (804) away from the crushing chamber (801) is fixed to the top of the equipment base (1).

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