Multi-parameter control injection molding vulcanization equipment for chlorinated alkane flame-retardant rubber

Abstract

The utility model discloses multi-parameter control injection molding vulcanization equipment for chlorinated alkane flame-retardant rubber, and relates to the technical field of rubber processing. The device comprises a vulcanizing machine, wherein a control box is arranged on the front surface of the vulcanizing machine; a control assembly is arranged on the surface of the vulcanizing machine and comprises a temperature sensor arranged on one side of the vulcanizing machine, a pressure sensor arranged on the front face of the vulcanizing machine and a pressurizer arranged on the top of the vulcanizing machine. According to the utility model, the state in the vulcanization cavity is monitored in real time through the temperature sensor and the pressure sensor, and the control box dynamically adjusts the output pressure of the pressurizer and the cooling flow of the circulating pump based on a thermal decomposition kinetic model of chlorinated paraffin, so that the following synergistic effects are realized: when the temperature is close to a decomposition threshold value of chlorinated paraffin; the vulcanization pressure is automatically reduced so as to reduce heat generated by friction and inhibit the dechlorination reaction; and in a sudden viscosity change stage of the flame retardant, the pressure is synchronously increased to ensure that the flame retardant uniformly permeates into gaps of rubber fibers.

Description

Technical Field

[0001] This utility model belongs to the field of rubber processing technology, and in particular relates to a multi-parameter controlled injection pressure vulcanization device for chlorinated alkane flame-retardant rubber. Background Technology

[0002] Chlorinated paraffin is a chlorinated alkane and a chlorinated derivative of paraffin hydrocarbons. It possesses advantages such as low volatility, flame retardancy, good electrical insulation, and low cost. It can improve the flame retardant properties of rubber by replacing some hydrogen atoms in the rubber to form chlorinated derivatives. Vulcanization is one of the main processes in rubber processing. The vulcanization process involves the cross-linking of rubber molecules to form a network structure. Rubber vulcanization is carried out under specific pressure, temperature, and time conditions. These three conditions must be strictly controlled according to the different performance requirements of the rubber products to achieve the desired results.

[0003] Existing multi-parameter controlled injection pressure vulcanization equipment for chlorinated alkane flame-retardant rubber may cause dechlorination and decomposition of chlorinated paraffin at high vulcanization temperatures. Therefore, it is necessary to precisely control the vulcanization temperature window (usually 150-180℃) to balance flame retardant efficiency and the risk of thermal aging. Pressure control requirements: The viscosity of chlorinated paraffin changes significantly with temperature. Insufficient vulcanization pressure will lead to uneven distribution of it in the rubber matrix, forming weak areas in flame retardant performance and wasting heat. After cooling the mold, the heat is directly discharged, increasing costs.

[0004] To address these issues, we offer a multi-parameter controlled injection pressure vulcanization device for chlorinated alkane flame-retardant rubber. Utility Model Content

[0005] The purpose of this invention is to provide a multi-parameter controlled injection pressure vulcanization device for chlorinated alkane flame retardant rubber. By combining the control components and the heat utilization components, it solves the problems of independent temperature and pressure control and the inability to utilize heat energy gradient in the existing multi-parameter controlled injection pressure vulcanization devices for chlorinated alkane flame retardant rubber.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0007] This utility model relates to a multi-parameter controlled injection vulcanization device for chlorinated alkane flame-retardant rubber, comprising a vulcanizing machine, a control box being provided on the front of the vulcanizing machine; a control component being provided on the surface of the vulcanizing machine, the control component including a temperature sensor provided on one side of the vulcanizing machine, a pressure sensor provided on the front of the vulcanizing machine, and a pressurizer provided on the top of the vulcanizing machine; a heat utilization component being provided on one side of the vulcanizing machine, the heat utilization component including a circulation pipe provided in the inner cavity of the vulcanizing machine, a three-way valve communicating with the surface of the circulation pipe, an air temperature sensor provided on the surface of the circulation pipe, a storage box provided on one side of the vulcanizing machine, and a preheating box communicating with the bottom of one side of the storage box via a pipe.

[0008] The present invention is further configured such that the output terminal of the pressure sensor is bidirectionally electrically connected to the input terminal of the control box, the output terminal of the temperature sensor is bidirectionally electrically connected to the input terminal of the control box, and the output terminal of the control box is bidirectionally electrically connected to the input terminal of the pressure booster.

[0009] The present invention is further configured such that a partition is fixedly connected to the inner cavity of the storage box, and a drive motor is fixedly connected to one side of the partition. By setting the partition, it is convenient to put the storage box into the partition.

[0010] The present invention is further configured such that a first bevel gear is fixedly connected to the surface of the output shaft of the drive motor, a second bevel gear meshes with the surface of the first bevel gear, a first fan blade is fixedly connected to the shaft of the second bevel gear, and a second fan blade is fixedly connected to the surface of the output shaft of the drive motor. Through the cooperation of the drive motor, the first bevel gear, the second bevel gear, the first fan blade, and the second fan blade, the output shaft of the drive motor drives the second fan blade to rotate. At the same time, it drives the second fan blade to rotate through the first bevel gear and the second bevel gear, so that the heat storage liquid in the inner cavity of the storage tank circulates and flows, so that it fully contacts the circulation pipe, improves the cooling performance of the circulation pipe, and accurately compensates for the temperature rise caused by the decomposition of chlorinated paraffin.

[0011] The present invention is further configured such that there are two three-way valves, and a return pipe is connected between the two three-way valves, and a one-way valve is connected to the surface of the return pipe.

[0012] The present invention is further configured such that the output end of the temperature sensor is bidirectionally electrically connected to the input end of the control box, and the output end of the control box is bidirectionally electrically connected to the input end of the three-way valve. Through the action of the three-way valve, the one-way valve, and the return pipe, the one-way valve prevents uncooled gas from directly flowing back through the return pipe. At the same time, in conjunction with the temperature sensor, the corresponding port of the three-way valve can be controlled to open or close, so that the temperature of the gas returning to the vulcanizing machine cavity is within the set value range, thus ensuring the cooling effect.

[0013] The present invention is further configured such that a circulation pump is connected to the surface of the circulation pipe, and the circulation pipe is arranged in a U-shaped array inside the storage box.

[0014] The present invention has the following beneficial effects.

[0015] 1. This utility model monitors the state inside the vulcanizing chamber in real time through temperature and pressure sensors. The control box is based on the thermal decomposition kinetic model of chlorinated paraffin and dynamically adjusts the output pressure of the pressurizer and the cooling flow of the circulating pump to achieve the following synergistic effects: when the temperature approaches the decomposition threshold of chlorinated paraffin, the vulcanizing pressure is automatically reduced to reduce frictional heat generation and inhibit the dechlorination reaction; during the stage of sudden viscosity change of the flame retardant, the pressure is increased simultaneously to ensure that the flame retardant penetrates evenly into the gaps between the rubber fibers.

[0016] 2. This utility model recovers waste heat from the vulcanizing chamber through a heat utilization component via a circulation pipe. The heat is then efficiently exchanged with the heat storage medium via a U-shaped array heat exchange tube in the storage box. A three-way valve and a temperature sensor form a closed-loop control: when the high-pressure set value of the return gas temperature is detected, the return pipe is opened for secondary cooling to ensure that the airflow temperature entering the preheating box is stable within the specified range, thereby reducing the energy consumption of mold preheating. The drive motor uses double fan blades for forced convection to avoid media decomposition caused by local overheating.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 A three-dimensional view of a multi-parameter controlled injection pressure vulcanization device for chlorinated alkane flame-retardant rubber.

[0020] Figure 2 Left view of a multi-parameter controlled injection pressure vulcanization device for chlorinated alkane flame-retardant rubber.

[0021] Figure 3 This is a cross-sectional view of the storage tank in a multi-parameter controlled injection pressure vulcanization device for chlorinated alkane flame-retardant rubber.

[0022] Figure 4 This is a diagram showing the alignment of the first and second blades in a multi-parameter controlled injection pressure vulcanization device for chlorinated alkane flame-retardant rubber.

[0023] Figure 5 This is a system schematic diagram of a multi-parameter controlled injection pressure vulcanization equipment for chlorinated alkane flame-retardant rubber.

[0024] In the attached diagram: 1. Vulcanizing machine; 2. Control box; 3. Temperature sensor; 4. Pressure sensor; 5. Pressurizer; 6. Circulation pipe; 7. Three-way valve; 8. Air temperature sensor; 9. Storage tank; 10. Preheating box; 11. Baffle plate; 12. Drive motor; 13. First bevel gear; 14. Second bevel gear; 15. First fan blade; 16. Second fan blade; 17. Return pipe; 18. Check valve; 19. Circulation pump. Detailed Implementation

[0025] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Example 1

[0027] Please see Figures 1-5 This utility model is a multi-parameter controlled injection vulcanization device for chlorinated alkane flame-retardant rubber, including a vulcanizing machine 1, a control box 2 on the front of the vulcanizing machine 1; a control component on the surface of the vulcanizing machine 1, including a temperature sensor 3 on one side of the vulcanizing machine 1, a pressure sensor 4 on the front of the vulcanizing machine 1, and a pressure booster 5 on the top of the vulcanizing machine 1, which ensures the effect of rubber vulcanization through coordinated control of temperature and pressure; a heat utilization component on one side of the vulcanizing machine 1, including a circulation pipe 6 in the inner cavity of the vulcanizing machine 1, a three-way valve 7 communicating with the surface of the circulation pipe 6, an air temperature sensor 8 on the surface of the circulation pipe 6, a storage box 9 on one side of the vulcanizing machine 1, and a preheating box 10 communicating with the bottom of one side of the storage box 9 through a pipe.

[0028] Further details: Control box 2, temperature sensor 3, pressure sensor 4, and pressurizer 5 (all existing technologies). Control box 2 mainly initiates terminal control functions. Temperature sensor 3 detects the temperature of the rubber inside the mold at different stages. In the main vulcanization section, the heat utilization component accurately compensates for the temperature rise caused by the decomposition of chlorinated paraffin. In the post-vulcanization section, gradient cooling is achieved to prevent stress concentration inside the product. At the same time, the cooling heat can be accurately guided to the inner cavity of the preheating box 10 through the heat utilization component to preheat the mold, ensuring that the temperature of the mold entering the vulcanizing machine 1 remains consistent and improving the product yield. Pressure sensor 4, in conjunction with pressurizer 5, automatically adjusts the material injection pressure to ensure that the chlorinated paraffin flame retardant penetrates evenly into the gaps between the rubber fibers.

[0029] Example 2

[0030] Please see Figures 1-5Based on Example 1, the output of pressure sensor 4 is bidirectionally electrically connected to the input of control box 2, the output of temperature sensor 3 is bidirectionally electrically connected to the input of control box 2, the output of control box 2 is bidirectionally electrically connected to the input of pressurizer 5, a partition 11 is fixedly connected to the inner cavity of storage box 9, a drive motor 12 is fixedly connected to one side of partition 11, a first bevel gear 13 is fixedly connected to the surface of the output shaft of drive motor 12, a second bevel gear 14 meshes with the surface of the first bevel gear 13, a first fan blade 15 is fixedly connected to the shaft of the second bevel gear 14, a second fan blade 16 is fixedly connected to the surface of the output shaft of drive motor 12, there are two three-way valves 7, and a return pipe 17 is connected between the two three-way valves 7, a one-way valve 18 is connected to the surface of the return pipe 17, the output of temperature sensor 8 is bidirectionally electrically connected to the input of control box 2, the output of control box 2 is bidirectionally electrically connected to the input of three-way valve 7, a circulation pump 19 is connected to the surface of circulation pipe 6, and the circulation pipe 6 is arranged in a U-shaped array in the inner cavity of storage box 9.

[0031] Further details: By setting up a partition 11, the storage tank 9 is easily inserted into the partition. Through the cooperation of the drive motor 12, the first bevel gear 13, the second bevel gear 14, the first fan blade 15, and the second fan blade 16, the output shaft of the drive motor 12 drives the second fan blade 16 to rotate. At the same time, the first bevel gear 13 and the second bevel gear 14 drive the second fan blade 16 to rotate, so that the heat storage liquid in the inner cavity of the storage tank 9 circulates and makes full contact with the circulation pipe 6, improving the cooling performance of the circulation pipe 6 and accurately compensating for the temperature rise caused by the decomposition of chlorinated paraffin. Through the action of the three-way valve 7, the one-way valve 18, and the return pipe 17, the one-way valve 18 prevents the uncooled gas from directly flowing back through the return pipe 17. At the same time, in conjunction with the temperature sensor 8, the corresponding port of the three-way valve 7 can be controlled to open or close, so that the temperature of the gas returning to the inner cavity of the vulcanizer 1 is within the set value range, ensuring the cooling effect.

[0032] The working principle of this utility model is as follows: Temperature sensor 3 detects the temperature of the rubber in the mold at different stages. When cooling is required, temperature sensor 3 sends a signal to control box 2. Control box 2 controls circulation pump 19 to start. Circulation pump 19 drives airflow in circulation pipe 6. The heat storage liquid in the inner cavity of storage tank 9 exchanges heat with circulation pipe 6. At the same time, the output shaft of drive motor 12 drives the second fan blade 16 to rotate. Simultaneously, it drives the second fan blade 16 to rotate through the first bevel gear 13 and the second bevel gear 14, so that the heat storage liquid in the inner cavity of storage tank 9 circulates and fully contacts circulation pipe 6, improving the cooling performance of circulation pipe 6. Temperature sensor 8 detects the temperature of return gas. When the temperature is higher than the set value, temperature sensor 8 controls the corresponding port of three-way valve 7 to open or close through control box 2, so that gas flows back into circulation pipe 6 through return pipe 17, so that it exchanges heat with heat storage liquid until the temperature of the gas returning to the inner cavity of vulcanizing machine 1 is within the set value range, ensuring the cooling effect and accurately compensating for the temperature rise caused by the decomposition of chlorinated paraffin.

[0033] Meanwhile, the heat-storing liquid inside the storage tank 9 circulates through the pipes in the preheating tank 10 to preheat the mold, ensuring that the temperature of the mold entering the vulcanizing machine 1 remains consistent, thus improving the product yield. The pressure sensor 4, in conjunction with the pressure booster 5, automatically adjusts the material injection pressure to ensure that the chlorinated paraffin flame retardant penetrates evenly into the gaps between the rubber fibers. Through temperature and pressure linkage control, the pressure is adjusted in time when the decomposition rate of chlorinated paraffin accelerates, effectively avoiding the problems of rubber molecular chain degradation and uneven distribution of flame retardant caused by the decomposition of chlorinated paraffin, thereby synergistically optimizing the flame retardancy and mechanical properties of the rubber.

[0034] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A multi-parameter controlled injection press vulcanization apparatus for chlorinated alkane flame retardant rubber comprising a vulcanization press (1), characterized in that: The vulcanizing machine (1) has a control box (2) on its front side; The surface of the vulcanizing machine (1) is provided with a control component, which includes a temperature sensor (3) on one side of the vulcanizing machine (1), a pressure sensor (4) on the front of the vulcanizing machine (1), and a pressure device (5) on the top of the vulcanizing machine (1). A heat utilization component is provided on one side of the vulcanizing machine (1). The heat utilization component includes a circulation pipe (6) installed in the inner cavity of the vulcanizing machine (1), a three-way valve (7) communicating with the surface of the circulation pipe (6), a temperature sensor (8) installed on the surface of the circulation pipe (6), a storage box (9) installed on one side of the vulcanizing machine (1), and a preheating box (10) connected to the bottom of one side of the storage box (9) through a pipe.

2. A multi-parameter controlled injection press vulcanization apparatus for chlorinated alkane flame retarded rubber according to claim 1, characterized in that: The output of the pressure sensor (4) is bidirectionally electrically connected to the input of the control box (2), the output of the temperature sensor (3) is bidirectionally electrically connected to the input of the control box (2), and the output of the control box (2) is bidirectionally electrically connected to the input of the pressure booster (5).

3. The multi-parameter controlled injection press vulcanization apparatus for chlorinated alkane flame retardant rubber according to claim 1, characterized in that: The storage box (9) has a partition (11) fixedly connected to its inner cavity, and a drive motor (12) is fixedly connected to one side of the partition (11).

4. The multi-parameter controlled injection press vulcanization apparatus for chlorinated alkane flame retarded rubber according to claim 3, characterized in that: A first bevel gear (13) is fixedly connected to the output shaft surface of the drive motor (12), a second bevel gear (14) meshes with the surface of the first bevel gear (13), a first fan blade (15) is fixedly connected to the shaft center of the second bevel gear (14), and a second fan blade (16) is fixedly connected to the output shaft surface of the drive motor (12).

5. The multi-parameter controlled injection press vulcanization apparatus for chlorinated alkane flame retardant rubber of claim 1, characterized in that: There are two three-way valves (7), and a return pipe (17) is connected between the two three-way valves (7). A one-way valve (18) is connected to the surface of the return pipe (17).

6. The multi-parameter control injection press curing apparatus for chlorinated alkane flame retardant rubber of claim 1, wherein: The output terminal of the temperature sensor (8) is bidirectionally electrically connected to the input terminal of the control box (2), and the output terminal of the control box (2) is bidirectionally electrically connected to the input terminal of the three-way valve (7).

7. The multi-parameter controlled injection pressure vulcanization equipment for chlorinated alkane flame-retardant rubber according to claim 1, characterized in that: The circulation pipe (6) is connected to a circulation pump (19) on its surface, and the circulation pipe (6) is arranged in a U-shaped array inside the storage box (9).

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