A rubber pre-treatment device

Abstract

The application provides a rubber pretreatment device, relates to the technical field of rubber heating pretreatment, and comprises a support frame, an installation platform is arranged in the support frame, a hot air supply assembly is installed on the installation platform, a transmission frame is fixedly connected to the upper end of the support frame, a transmission belt is installed in the transmission frame, a rubber preheating assembly is arranged on the transmission frame, the rubber preheating assembly is communicated with the hot air supply assembly, and a group of temperature detection devices are arranged at the left and right ends of the rubber preheating assembly. The rubber is preheated, the processing performance and processing smoothness of the rubber during subsequent processing of the extruder are improved, and the stability and reliability of the rubber plasticization of the subsequent extruder are ensured. The rubber is preheated, and problems in product quality caused by insufficient heating and plasticization capacity of the extruder on the rubber during subsequent production are prevented.

Description

Technical Field

[0001] This invention relates to the field of rubber pretreatment technology, and more particularly to a rubber pretreatment apparatus. Background Technology

[0002] The process of an extruder acting on rubber compound: The rubber compound (raw sheet rubber) is originally in a highly elastic state. The feeding mechanism conveys the rubber compound into the barrel. The screw shears, heats, and plasticizes the rubber compound, and the heating system of the extruder barrel maintains it at a certain temperature. As the screw rotates and propels the compound, it gradually transforms into a molten state. However, in production, there are quality problems with the extruded rubber compound due to poor thermoplasticization of the raw sheet rubber, which affects product conveying efficiency, stability, and process control of subsequent processes.

[0003] In existing technologies, the rubber compound is directly processed using an extruder without any pretreatment device before it enters the extruder. This can lead to quality issues during extrusion due to poor thermoplasticization of the virgin rubber, affecting product quality stability. Summary of the Invention

[0004] This invention provides a rubber pretreatment device to solve the problem in the prior art that lacks pretreatment of rubber materials, which leads to quality problems in rubber extrusion due to poor thermoplasticization of raw rubber sheets, thus affecting the stability of product quality.

[0005] On one hand, the present invention provides a rubber pretreatment device, including a support frame, an installation platform disposed within the support frame, a hot air supply component mounted on the installation platform, a transmission frame fixedly connected to the upper end of the support frame, a transmission belt disposed within the transmission frame, a rubber preheating component disposed on the transmission frame, the rubber preheating component being connected to the hot air supply component, and a first temperature sensor and a second temperature sensor respectively disposed at the left and right ends of the rubber preheating component, the first temperature sensor being used to detect the initial temperature of the rubber, and the second temperature sensor being used to detect the temperature of the rubber after pretreatment.

[0006] Preferably, the hot air supply component includes a hot air box, an electric heating element installed inside the hot air box, a hot air outlet pipe and a hot air return pipe connected to the hot air box, a fan installed at the air inlet of the hot air outlet pipe, and both the hot air outlet pipe and the hot air return pipe are connected to the rubber preheating component.

[0007] Preferably, the preheating assembly for the rubber compound includes a mounting frame, which is fixedly connected to the transmission frame. A heating roller is rotatably connected to the mounting frame. The outer surface of the heating roller is provided with several air outlets. The hot air outlet pipe and the hot air return pipe are both connected to the inner cavity of the heating roller. A gear one is fixedly mounted on the heating roller. A drive motor is fixedly mounted on the mounting frame. A gear two is fixedly connected to the output end of the drive motor. Gear one and gear two mesh and transmit power.

[0008] Preferably, it also includes a control system, which includes:

[0009] The first speed adjustment module is used to adjust the conveying speed of the conveyor belt;

[0010] The second speed adjustment module is used to adjust the rotational speed of the heating drum;

[0011] The air supply control module is used to regulate the hot air supply of the hot air supply component.

[0012] Preferably, the first speed regulation module includes:

[0013] The demand acquisition module is used to acquire the real-time demand for the rubber compound.

[0014] A height sensor is used to obtain the stacking height of the rubber material on the conveyor belt;

[0015] The first speed control unit is used to calculate the target conveying speed of the conveyor belt based on the real-time demand of the rubber material and the real-time rubber material accumulation height of the conveyor belt, and adjust the actual conveying speed of the conveyor belt to the target conveying speed.

[0016] ; U is the target conveying speed of the conveyor belt; D is the required amount of rubber compound per unit time; H is the width of the conveyor belt; and H is the real-time accumulation height of the rubber compound on the conveyor belt.

[0017] Preferably, the second speed regulation module includes:

[0018] The first speed sensor is used to detect the actual conveying speed of the conveyor belt;

[0019] The third temperature sensor is used to detect the surface temperature of the heating drum;

[0020] The second speed sensor is used to detect the actual rotational speed of the heating drum;

[0021] The target speed calculation unit is used to calculate the target rotational speed of the heating drum;

[0022] ;in, The target rotational speed of the heating drum; This refers to the actual conveying speed of the conveyor belt; This refers to the slip ratio of the rubber compound on the conveyor belt; Ideal heating time for the rubber compound; This refers to the actual heating time of the rubber compound. This is the temperature uniformity adjustment coefficient; This refers to the actual surface temperature of the heating drum; The target temperature for the rubber compound;

[0023] The adjustment and verification unit is used to verify whether the difference between the actual speed of the heating drum and the target speed of the heating drum is greater than a preset first adjustment threshold. If it is greater than the first adjustment threshold, the actual speed of the heating drum is adjusted to the target speed of the heating drum; otherwise, the speed of the heating drum is not adjusted.

[0024] Preferably, the gas supply control module includes:

[0025] The air supply temperature control unit is used to adjust the air supply temperature of hot air.

[0026] The hot air flow control unit is used to regulate the hot air supply flow rate.

[0027] Preferably, the gas supply temperature control unit includes:

[0028] The first flow sensor is used to detect the airflow rate of the hot air box;

[0029] The fourth temperature sensor is used to detect the inlet air temperature of the hot air box;

[0030] The power regulation subunit is used to periodically calculate the target power of the heating element and adjust the actual power of the heating element to the target power.

[0031] Where P is the target power of the heating element; The specific heat capacity of air; This represents the actual airflow rate of the current hot air box; The standard operating temperature for the heating drum; π is the thermal conductivity between the surface of the heating roller and the surface of the rubber compound; π is pi. The radius of the outer surface of the heating drum; The width of the heating drum; This refers to the ratio of the contact area between the heating roller and the surface of the rubber compound to the outer surface area of ​​the heating roller. This refers to the initial temperature of the rubber compound. The convective heat transfer coefficient between the outer wall of the heating drum and the air; The thermal conductivity between the hot air and the heating drum; The radius of the inner cavity of the heating drum; The width of the inner cavity of the heating drum; This represents the average inlet air temperature of the hot air box. This refers to the thermal efficiency of the heating element.

[0032] Preferably, the hot air flow control unit includes:

[0033] The target flow calculation subunit is used to calculate the target value of the hot air supply flow rate;

[0034] ;in, The target value for the hot air supply flow rate; denoted as , where A is the specific heat capacity of the rubber compound; A is the projected area of ​​the heating zone on the horizontal plane; H is the real-time accumulation height of the rubber compound on the conveyor belt. The target temperature for the rubber compound; This refers to the initial temperature of the rubber compound. π is the thermal conductivity between the surface of the heating roller and the surface of the rubber compound; π is pi. The radius of the outer surface of the heating drum; The width of the heating drum; This refers to the ratio of the contact area between the heating roller and the surface of the rubber compound to the outer surface area of ​​the heating roller. This refers to the actual surface temperature of the heating drum. This refers to the actual heating time of the rubber compound. When the hot air temperature is At that time, the total heat transferred per unit volume of hot air to the rubber compound; This refers to the current actual hot air temperature; The preset optimal hot air temperature; This refers to the total duration for the hot air to heat the rubber compound. The proportion of hot air ejected from the air outlet;

[0035] The adjustment judgment subunit is used to determine whether to adjust the hot air supply flow rate;

[0036] ;in, This is the flow rate adjustment value; The target value for the hot air supply flow rate; This represents the actual airflow rate of the current hot air box;

[0037] When the flow rate adjustment value is greater than the preset second adjustment threshold, the actual air supply flow rate of the hot air will be adjusted to the target value of the hot air supply flow rate; otherwise, the actual air supply flow rate of the hot air will not be adjusted.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] The pretreatment and heating process of the rubber compound improves its processing performance and smoothness during subsequent extrusion, ensuring the stability and reliability of plasticization by the extruder. This preheating process also prevents product quality issues caused by insufficient heating and plasticizing capacity of the extruder during later production. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of the present invention;

[0042] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0043] Figure 3 This is a schematic diagram of the hot air supply assembly of the present invention.

[0044] Figure label:

[0045] 1. Support frame; 2. Mounting platform; 3. Transmission frame; 4. Conveyor belt; 5. Hot air box; 6. Electric heating element; 7. Hot air outlet pipe; 8. Hot air return pipe; 9. Mounting frame; 10. Heating roller; 11. Gear 1; 12. Drive motor; 13. Gear 2; 14. First temperature sensor; 15. Second temperature sensor. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0047] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0048] Example 1

[0049] This invention provides a rubber pretreatment device, such as... Figure 1-3 As shown, the assembly includes a support frame 1, an installation platform 2 inside the support frame 1, a hot air supply component installed on the installation platform 2, a transmission frame 3 fixedly connected to the upper end of the support frame 1, a transmission belt 4 installed inside the transmission frame 3, a rubber preheating component installed on the transmission frame 3, the rubber preheating component being connected to the hot air supply component, and a first temperature sensor 14 and a second temperature sensor 15 respectively installed at the left and right ends of the rubber preheating component. The first temperature sensor 14 is used to detect the initial temperature of the rubber, and the second temperature sensor 15 is used to detect the temperature of the rubber after pretreatment.

[0050] Preferably, the hot air supply assembly includes a hot air box 5, an electric heating tube 6 installed inside the hot air box 5, a hot air outlet pipe 7 and a hot air return pipe 8 connected to the hot air box 5, a fan installed at the air inlet of the hot air outlet pipe 7, and both the hot air outlet pipe 7 and the hot air return pipe 8 are connected to the rubber preheating assembly.

[0051] Preferably, the preheating assembly for the adhesive includes a mounting frame 9, which is fixedly connected to the transmission frame 3. A heating roller 10 is rotatably connected to the mounting frame 9. The outer surface of the heating roller 10 is provided with several air outlets. The hot air outlet pipe 7 and the hot air return pipe 8 are both connected to the inner cavity of the heating roller 10. A gear 11 is fixedly mounted on the heating roller 10. A drive motor 12 is fixedly mounted on the mounting frame 9. A gear 2 13 is fixedly connected to the output end of the drive motor 12. The gear 11 and the gear 2 13 mesh and drive each other.

[0052] The beneficial effects of the above technical solution are as follows:

[0053] During the pretreatment of the rubber compound, the rubber compound is placed on the conveyor belt 4. Through the transport of the conveyor belt 4, the rubber compound passes sequentially through the first temperature sensor 14, the rubber compound preheating component, and the second temperature sensor 15. The actual temperature of the rubber compound is detected by the two temperature detection devices. The outlet temperature and outlet flow rate of the hot air box 5 are adjusted to keep the temperature of the rubber compound within the ideal range, thereby improving the physical properties of the rubber compound and improving the stability of product quality.

[0054] The pretreatment and heating process of the rubber compound improves its processing performance and smoothness during subsequent extrusion, ensuring the stability and reliability of plasticization by the extruder. This preheating process also prevents product quality issues caused by insufficient heating and plasticizing capacity of the extruder during later production.

[0055] Example 2

[0056] Based on Example 1, the control system includes:

[0057] The first speed adjustment module is used to adjust the conveying speed of the conveyor belt;

[0058] The second speed adjustment module is used to adjust the rotational speed of the heating drum 10;

[0059] The air supply control module is used to regulate the hot air supply of the hot air supply component.

[0060] Preferably, the first speed regulation module includes:

[0061] The demand acquisition module is used to acquire the real-time demand for the rubber compound.

[0062] A height sensor is used to obtain the stacking height of the adhesive on conveyor belt 4;

[0063] The first speed control unit is used to calculate the target conveying speed of the conveyor belt 4 based on the real-time demand of the rubber material and the real-time rubber material accumulation height of the conveyor belt 4, and adjust the actual conveying speed of the conveyor belt 4 to the target conveying speed of the conveyor belt 4.

[0064] ; U is the target conveying speed of conveyor belt 4; U is the required amount of rubber material per unit time; D is the width of conveyor belt 4; H is the real-time accumulation height of rubber material on conveyor belt 4.

[0065] Preferably, the second speed regulation module includes:

[0066] The first speed sensor is used to detect the actual conveying speed of conveyor belt 4;

[0067] The third temperature sensor is used to detect the surface temperature of the heating drum 10;

[0068] The second speed sensor is used to detect the actual rotational speed of the heating drum 10;

[0069] The target speed calculation unit is used to calculate the target rotational speed of the heating drum 10;

[0070] ;in, The target rotational speed for heating drum 10; This refers to the actual conveying speed of conveyor belt 4; The slip ratio of the rubber compound on conveyor belt 4; Ideal heating time for the rubber compound; This refers to the actual heating time of the rubber compound. This is the temperature uniformity adjustment coefficient; The actual surface temperature of the heating roller 10; The target temperature for the rubber compound;

[0071] The adjustment and verification unit is used to verify whether the difference between the actual rotation speed of the heating drum 10 and the target rotation speed of the heating drum 10 is greater than a preset first adjustment threshold. If it is greater than the first adjustment threshold, the actual rotation speed of the heating drum 10 is adjusted to the target rotation speed of the heating drum 10; otherwise, the rotation speed of the heating drum 10 is not adjusted.

[0072] In this embodiment, the rubber heating time refers to the length of time the rubber is in contact with the heating roller 10.

[0073] In this embodiment, the slip ratio refers to the ratio of the sliding speed of the rubber material relative to the conveyor belt 4 to the speed of the conveyor belt 4.

[0074] In this embodiment, the rubber heating time refers to the time the rubber is within the heating zone.

[0075] The beneficial effects of the above technical solution are as follows:

[0076] The conveyor belt speed is adjusted in real time according to the demand for rubber material, so as to ensure that the supply of rubber material matches the demand and avoid insufficient supply of rubber material or excessive supply of rubber material causing the physical properties of the rubber material to decline after cooling.

[0077] By adjusting the rotation speed of the heating roller 10, the contact surface between the heating roller 10 and the rubber compound is kept at a suitable temperature, ensuring the rational use of heat and ensuring that the rubber compound receives sufficient heat during the preheating process. This avoids unnecessary energy waste, reduces energy loss in the pretreatment process, and ensures that the rubber compound is heated evenly during the preheating process, effectively improving the physical properties of the rubber compound.

[0078] Example 3

[0079] Based on Example 2, the gas supply control module includes:

[0080] The air supply temperature control unit is used to adjust the air supply temperature of hot air.

[0081] The hot air flow control unit is used to regulate the hot air supply flow rate.

[0082] Preferably, the gas supply temperature control unit includes:

[0083] The first flow sensor is used to detect the air intake flow of the hot air box 5;

[0084] The fourth temperature sensor is used to detect the air intake temperature of the hot air box 5;

[0085] The power regulation subunit is used to periodically calculate the target power of the heating element 6 and adjust the actual power of the heating element 6 to the target power of the heating element 6.

[0086] Where P is the target power of heating element 6; The specific heat capacity of air; This represents the actual airflow rate of the current hot air box 5; The standard operating temperature of the heating drum 10; π is the thermal conductivity between the surface of the heating roller 10 and the surface of the rubber compound; π is pi. The radius of the outer surface of the heating roller 10; The width of the heating drum 10; The ratio of the contact area between the heating roller 10 and the surface of the rubber compound to the outer surface area of ​​the heating roller 10; This refers to the initial temperature of the rubber compound. The convective heat transfer coefficient between the outer wall of the heating drum 10 and the air; The thermal conductivity between the hot air and the heating drum 10; The radius of the inner cavity of the heating drum 10; The width of the inner cavity of the heating drum 10; The average inlet air temperature of hot air box 5; The thermal efficiency of heating element 6.

[0087] Preferably, the hot air flow control unit includes:

[0088] The target flow calculation subunit is used to calculate the target value of the hot air supply flow rate;

[0089] ;in, The target value for the hot air supply flow rate; denoted as , where is the specific heat capacity of the rubber compound; A is the projected area of ​​the heating zone on the horizontal plane; H is the real-time accumulation height of the rubber compound on conveyor belt 4. The target temperature for the rubber compound; This refers to the initial temperature of the rubber compound. π is the thermal conductivity between the surface of the heating roller 10 and the surface of the rubber compound; π is pi. The radius of the outer surface of the heating roller 10; The width of the heating drum 10; The ratio of the contact area between the heating roller 10 and the surface of the rubber compound to the outer surface area of ​​the heating roller 10; The actual surface temperature of the heating roller 10; This refers to the actual heating time of the rubber compound. When the hot air temperature is At that time, the total heat transferred per unit volume of hot air to the rubber compound; This refers to the current actual hot air temperature; The preset optimal hot air temperature; This refers to the total duration for the hot air to heat the rubber compound. The proportion of hot air ejected from the air outlet;

[0090] The adjustment judgment subunit is used to determine whether to adjust the hot air supply flow rate;

[0091] ;in, This is the flow rate adjustment value; The target value for the hot air supply flow rate; This represents the actual airflow rate of the current hot air box 5;

[0092] When the flow rate adjustment value is greater than the preset second adjustment threshold, the actual air supply flow rate of the hot air will be adjusted to the target value of the hot air supply flow rate; otherwise, the actual air supply flow rate of the hot air will not be adjusted.

[0093] In this embodiment, the initial temperature of the rubber compound refers to the temperature of the rubber compound before pretreatment.

[0094] In this embodiment, the hot air temperature is The total heat transferred per unit volume of hot air to the rubber compound was obtained through experiments.

[0095] In this embodiment, the proportion of hot air escaping from the air outlet refers to the proportion of the flow rate of hot air ejected through the air outlet to the total flow rate of hot air. ;in, The proportion of hot air ejected from the air outlet; The flow rate of hot air ejected from the air outlet; This represents the total flow rate of hot air.

[0096] The beneficial effects of the above technical solution are as follows:

[0097] By periodically adjusting the power of the heating element 6, the surface temperature of the heating roller 10 is kept stable at the standard temperature, thus ensuring a good preheating effect on the rubber compound while reducing the heat loss of the heating roller 10 to the external environment. By controlling the temperature of the heating roller 10 to remain stable, the preheating process of the rubber compound is ensured to be uniform, avoiding uneven preheating of the rubber compound due to temperature fluctuations of the heating roller 10, which would affect the physical properties of the rubber compound. By acquiring the air intake of the hot air box 5, the power of the heating element 6 is adjusted in a targeted manner, thereby improving the stability of the hot air temperature and avoiding hot air temperature fluctuations, thus ensuring the temperature stability of the heating roller 10. Through precise temperature control, unnecessary energy waste is reduced, and the cost of heat treatment of the rubber compound is lowered.

[0098] Under the condition of ensuring stable hot air temperature, the preheating effect of the rubber compound is accurately controlled by adjusting the hot air supply flow rate. By controlling the total hot air inflow of the heating drum 10, the amount of hot air ejected from the inside of the heating drum 10 is accurately controlled, thereby achieving accurate control of the preheating effect of the rubber compound. This ensures that the rubber compound is within a suitable temperature range after pretreatment, thus guaranteeing the excellent physical properties of the rubber compound and improving the pretreatment effect. The determination of whether to adjust the hot air supply flow rate is made by calculating the flow rate adjustment value, avoiding the shortening of the device life caused by frequent adjustments of the hot air flow rate. At the same time, through the screening effect of multiple judgment results, the set value of the hot air supply flow rate can be made to have high resistance to fluctuations, thereby further reducing the adjustment frequency of the hot air flow rate. Even if there are sudden changes due to rubber compound characteristics (such as rubber compound temperature) or external environmental characteristics (such as ambient temperature), the temperature of the pretreated rubber compound can still be guaranteed to be within the allowable range, improving the resistance to fluctuations in the preheating effect (referring to the ability to remain within the allowable range after fluctuations in the preheating effect).

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rubber pretreatment device, characterized in that, Includes a support frame (1), an installation platform (2) is provided inside the support frame (1), a hot air supply component is installed on the installation platform (2), a transmission frame (3) is fixedly connected to the upper end of the support frame (1), a transmission belt (4) is installed inside the transmission frame (3), a rubber preheating component is provided on the transmission frame (3), the rubber preheating component is connected to the hot air supply component, a first temperature sensor (14) and a second temperature sensor (15) are respectively provided at the left and right ends of the rubber preheating component, the first temperature sensor (14) is used to detect the initial temperature of the rubber, and the second temperature sensor (15) is used to detect the temperature of the rubber after pretreatment; The preheating assembly for the rubber compound includes a mounting frame (9), which is fixedly connected to the transmission frame (3). A heating roller (10) is rotatably connected to the mounting frame (9). Several air outlets are provided on the outer surface of the heating roller (10). The hot air outlet pipe (7) and the hot air return pipe (8) are both connected to the inner cavity of the heating roller (10). A gear one (11) is fixedly mounted on the heating roller (10). A drive motor (12) is fixedly mounted on the mounting frame (9). A gear two (13) is fixedly connected to the output end of the drive motor (12). The gear one (11) and the gear two (13) mesh and drive each other. The device also includes a control system, which includes: The first speed adjustment module is used to adjust the conveying speed of the conveyor belt; The second speed adjustment module is used to adjust the rotational speed of the heating drum (10); The air supply control module is used to regulate the hot air supply of the hot air supply component; The device also includes a first speed regulation module and a second speed regulation module, the second speed regulation module comprising: The first speed sensor is used to detect the actual conveying speed of the conveyor belt (4); The third temperature sensor is used to detect the surface temperature of the heating drum (10); The second speed sensor is used to detect the actual rotational speed of the heating drum (10); The target speed calculation unit is used to calculate the target rotational speed of the heating drum (10); ;in, The target rotational speed for the heating drum (10); The actual conveying speed of the conveyor belt (4); The slip ratio of the rubber compound on the conveyor belt (4); Ideal heating time for the rubber compound; This refers to the actual heating time of the rubber compound. This is the temperature uniformity adjustment coefficient; The actual surface temperature of the heating roller (10); The target temperature for the rubber compound; The device also includes an adjustment and verification unit, which is used to verify whether the difference between the actual rotation speed of the heating drum (10) and the target rotation speed of the heating drum (10) is greater than a preset first adjustment threshold. If it is greater than the first adjustment threshold, the actual rotation speed of the heating drum (10) is adjusted to the target rotation speed of the heating drum (10); otherwise, the rotation speed of the heating drum (10) is not adjusted. The gas supply control module includes: The air supply temperature control unit is used to adjust the air supply temperature of hot air. The hot air flow control unit is used to regulate the hot air supply flow rate.

2. The rubber pretreatment device according to claim 1, characterized in that, The hot air supply assembly includes a hot air box (5), an electric heating tube (6) is installed inside the hot air box (5), a hot air outlet pipe (7) and a hot air return pipe (8) are connected to the hot air box (5), a fan is installed at the air inlet of the hot air outlet pipe (7), and both the hot air outlet pipe (7) and the hot air return pipe (8) are connected to the rubber preheating assembly.

3. The rubber pretreatment device according to claim 1, characterized in that, The first speed regulation module includes: The demand acquisition module is used to acquire the real-time demand for the rubber compound. A height sensor is used to obtain the stacking height of the rubber material on the conveyor belt (4); The first speed control unit is used to calculate the target conveying speed of the conveyor belt (4) based on the real-time demand of the rubber and the real-time rubber accumulation height of the conveyor belt (4), and adjust the actual conveying speed of the conveyor belt (4) to the target conveying speed of the conveyor belt (4). ; U is the target conveying speed of the conveyor belt (4); U is the unit time demand of the rubber compound; D is the width of the conveyor belt (4); H is the real-time accumulation height of the rubber compound on the conveyor belt (4).

4. The rubber pretreatment device according to claim 1, characterized in that, The gas supply temperature control unit includes: The first flow sensor is used to detect the air intake flow of the hot air box (5); The fourth temperature sensor is used to detect the air intake temperature of the hot air box (5); The power regulation subunit is used to periodically calculate the target power of the heating element (6) and adjust the actual power of the heating element (6) to the target power of the heating element (6); Where P is the target power of the heating element (6); The specific heat capacity of air; This represents the actual airflow rate of the current hot air box (5); The standard operating temperature for heating drum (10); The thermal conductivity between the surface of the heating roller (10) and the surface of the rubber compound is π; π is pi. The radius of the outer surface of the heating roller (10); The width of the heating drum (10); The ratio of the contact area between the heating roller (10) and the surface of the rubber compound to the outer surface area of ​​the heating roller (10); This refers to the initial temperature of the rubber compound. The convective heat transfer coefficient between the outer wall of the heating drum (10) and the air; The thermal conductivity between the hot air and the heating drum (10); The radius of the inner cavity of the heating drum (10); The width of the inner cavity of the heating drum (10); The average inlet temperature of the hot air box (5); The thermal efficiency of the electric heating tube (6).

5. The rubber pretreatment device according to claim 1, characterized in that, The hot air flow control unit includes: The target flow calculation subunit is used to calculate the target value of the hot air supply flow rate; ;in, The target value for the hot air supply flow rate; is the specific heat capacity of the rubber compound; A is the projected area of ​​the heating zone on the horizontal plane; H is the real-time accumulation height of the rubber compound on the conveyor belt (4); The target temperature for the rubber compound; This refers to the initial temperature of the rubber compound. The thermal conductivity between the surface of the heating roller (10) and the surface of the rubber compound is π; π is pi. The radius of the outer surface of the heating roller (10); The width of the heating drum (10); The ratio of the contact area between the heating roller (10) and the surface of the rubber compound to the outer surface area of ​​the heating roller (10); The actual surface temperature of the heating roller (10); This refers to the actual heating time of the rubber compound. When the hot air temperature is At that time, the total heat transferred per unit volume of hot air to the rubber compound; This refers to the current actual hot air temperature; The preset optimal hot air temperature; This refers to the total duration for the hot air to heat the rubber compound. The proportion of hot air ejected from the air outlet; The adjustment judgment subunit is used to determine whether to adjust the hot air supply flow rate; ;in, This is the flow rate adjustment value; The target value for the hot air supply flow rate; This represents the actual airflow rate of the current hot air box (5); When the flow rate adjustment value is greater than the preset second adjustment threshold, the actual air supply flow rate of the hot air will be adjusted to the target value of the hot air supply flow rate; otherwise, the actual air supply flow rate of the hot air will not be adjusted.

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