A pretreatment device for thermoplastic nylon resin

Abstract

The present invention discloses a pretreatment device for thermoplastic nylon resin, including a melting device and a vacuum dehydration device; the melting device includes a melting tank and an electronic scale; the melting tank is supported on the electronic scale; the melting tank adopts a jacketed tank, the cover plate of the melting tank is provided with a resin adding port, an exhaust valve, a dehydration pipe interface and a stirring motor, a stirrer is provided in the melting tank, and the output shaft of the stirring motor is connected to the stirrer; the dehydration pipe interface is connected to the vacuum dehydration device through a dehydration pipe; an oil inlet and an oil outlet are provided on the outer wall of the jacket layer of the melting tank; the oil inlet and the oil outlet are connected to an oil circulation device; a heater is provided at the bottom of the jacket layer of the melting tank. The present invention has a simple structure and low cost; the electronic scale is provided at the melting tank of the present invention, and the stirrer is provided in the melting tank, which can automatically measure and add auxiliary materials and mix them evenly, and the present invention is provided with a vacuum dehydration device, which can vacuum dehydrate, and shorten the pretreatment time of the resin, thereby improving production efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of resin processing devices, and in particular relates to a preprocessing device for thermoplastic nylon resin. Background Art

[0002] With the development of polymer materials in my country, thermoplastic resin materials are widely used in nylon products and glass fiber / carbon fiber composite products. Thermoplastic resin materials are solid at room temperature. Before use, they must be melted and pre-treated by adding active materials before entering the casting machine for curing and molding. Therefore, pre-treatment equipment such as fully automatic melting, automatic metering and adding auxiliary materials, uniform mixing, vacuum dehydration, etc. are required. However, the existing resin pre-treatment devices have relatively simple functions and cannot automatically measure and add auxiliary materials. This not only prolongs the pre-treatment time and affects production efficiency, but also is difficult to apply to the pre-treatment of thermoplastic resin materials.

[0003] Our company has developed a pretreatment device for thermoplastic nylon resin, which uses a multifunctional melting tank with electronic scale measurement. The melting tank uses heat-conducting oil to evenly heat the resin to the melting temperature, and then adds various required auxiliary materials in sequence. After all are heated and melted, they are stirred and mixed and vacuumed for dehydration. After all the resin materials in the melting tank are evenly mixed, they are transferred to the corresponding working material tank through pipelines. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a thermoplastic nylon resin pretreatment device which has a simple structure, low cost, and can automatically melt the resin, automatically meter and add auxiliary materials, evenly mix, and vacuum and dehydrate.

[0005] The technical solution adopted by the present invention is: a pretreatment device for thermoplastic nylon resin, comprising a melting device and a vacuum dehydration device;

[0006] The melting device comprises a melting tank, an electronic scale and an oil tank; the melting tank is supported on the electronic scale, and the electronic scale is supported on the foundation; the melting tank is a jacketed tank, and a resin adding port, an exhaust valve, a dehydration pipe interface and a stirring motor are arranged on the cover plate of the melting tank; a stirrer is arranged in the melting tank, and the output shaft of the stirring motor is connected to the upper end of the stirrer; the dehydration pipe interface is connected to a vacuum dehydration device through a dehydration pipe; a condenser is arranged on the dehydration pipe;

[0007] An oil inlet is provided at the bottom of the outer wall of the jacket layer of the melting tank; an oil outlet is provided at the upper part of the outer wall of the jacket layer of the melting tank, the inlet of the oil pump is connected to the oil tank through a pipeline, and the outlet of the oil pump is connected to the oil inlet through a pipeline; the oil outlet is connected back to the oil tank through an oil return pipe, and a cooler is provided on the oil return pipe; a heater is provided at the bottom of the jacket layer of the melting tank; and the vacuum dehydration device can evacuate the melting tank and cool the gas entering the vacuum pump.

[0008] In the above-mentioned pretreatment device for thermoplastic nylon resin, the vacuum dehydration device includes a vacuum buffer device and a vacuum pumping device; the vacuum buffer device includes a vacuum buffer tank; the vacuum buffer tank adopts a jacket tank, and the vacuum buffer tank is connected to the melting tank through a dehydration pipe; heat transfer oil is provided in the jacket layer of the vacuum buffer tank, and a heat transfer oil heater is provided at the bottom of the jacket layer of the vacuum buffer tank; an oil inlet is provided at the bottom of the outer wall of the jacket layer of the vacuum buffer tank, and an oil outlet is provided at the upper part of the outer wall of the jacket layer of the vacuum buffer tank; the inlet of the heat transfer oil pump is connected to the oil outlet through an oil return pipe, and the outlet of the heat transfer oil pump is connected to the oil inlet through a pipeline;

[0009] The vacuum pumping device comprises a vacuum pump and a vacuum tank. The vacuum tank is provided with an air inlet and an air outlet. The air inlet is connected to the vacuum buffer tank through a pipeline, and the air outlet is connected to the vacuum pump through a pipeline. A cooling pipe is provided in the vacuum tank. The inlet of the cooling pipe is connected to the outlet of the water pump through a pipeline. The outlet of the cooling pipe is connected to the water tank through a pipeline. The inlet of the water pump is connected to the water tank through a pipeline.

[0010] In the above-mentioned pretreatment device for thermoplastic nylon resin, the melting tank and the vacuum buffer tank are respectively provided with a melting tank vacuum gauge and a vacuum gauge; and an oil heater is provided in the oil tank.

[0011] In the above-mentioned pretreatment device for thermoplastic nylon resin, a temperature sensor is installed on the condenser; a hot oil circulation pressure gauge is provided on the pipeline connecting the oil pump outlet and the oil inlet; a thermal oil pressure gauge is provided on the pipeline connecting the thermal oil pump outlet and the oil inlet.

[0012] In the above-mentioned pretreatment device for thermoplastic nylon resin, the condenser is provided with a water inlet and a water outlet, and the cooler is also provided with a water inlet and a water outlet; the water inlet of the condenser and the water inlet of the cooler are connected to the main water inlet pipe through a branch water inlet pipe, the main water inlet pipe is connected to the outlet of the water pump, and the inlet of the water pump is connected to the water tank; the water outlet of the condenser and the outlet of the cooler are connected to the main water outlet pipe through a branch water pipe, and the main water outlet pipe is connected to the water tank.

[0013] In the above-mentioned pretreatment device for thermoplastic nylon resin, the vacuum pump is arranged in a closed box, and the box is provided with a water inlet and a water outlet; the water inlet is connected to the pipe connected to the water pump at the inlet of the cooling pipe through a water pipe, and the water outlet is connected to the pipe connected to the water tank at the outlet of the cooling pipe.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The invention has a simple structure and low cost. The melting tank of the invention is provided with an electronic scale, and the melting tank is provided with a stirrer, which can automatically measure and add auxiliary materials and mix them evenly. The invention is also provided with a vacuum dehydration device, which can vacuum dehydrate, shorten the pretreatment time of the resin, and improve the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 It is a structural diagram of the melting device of the present invention.

[0018] Figure 3 It is a structural diagram of the vacuum buffer device of the present invention.

[0019] Figure 4 It is a structural diagram of the vacuum pumping device of the present invention. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] like Figure 1-4 As shown, the present invention includes a melting device and a vacuum dehydration device. Figure 2 As shown, the melting device includes a melting tank 101, an electronic scale 103 and an oil tank 119; the melting tank 101 is supported on the electronic scale 103, and the electronic scale 103 is supported on the foundation. The melting tank 101 adopts a jacketed tank, and the cover plate of the melting tank 101 is provided with a resin addition port 106, an exhaust valve 104, a melting tank vacuum gauge 113, a dehydration pipe interface and a stirring motor 105. The melting tank 101 is provided with an agitator 102, and the output shaft of the stirring motor 105 is connected to the upper end of the agitator 102; the stirring motor 105 can drive the agitator 102 to rotate to achieve uniform mixing of the materials. The dehydration pipe interface is connected to the vacuum dehydration device through the dehydration pipe 111; the dehydration pipe 111 is provided with a condenser 109; and the condenser 109 is installed with a temperature sensor 110.

[0022] An oil inlet is provided at the bottom of the outer wall of the jacket layer of the melting tank 101; an oil outlet is provided at the upper part of the outer wall of the jacket layer of the melting tank 101, the inlet of the oil pump 122 is connected to the oil tank 119 through a pipeline, and the outlet of the oil pump 122 is connected to the oil inlet through a pipeline, and a hot oil circulation pressure gauge 123 is provided on the pipeline. The oil outlet is connected back to the oil tank 119 through an oil return pipe, and a cooler 115 is provided on the oil return pipe, and an oil heater 120 is provided in the oil tank. A heater 117 is provided at the bottom of the jacket layer of the melting tank 101, and a resin temperature sensor 116 and a jacket temperature sensor 118 are provided on the melting tank 101, and the resin temperature sensor 116 and the jacket temperature sensor 118 are used to measure the temperature of the resin in the melting tank 101 and the temperature of the oil in the jacket layer of the melting tank, respectively.

[0023] The condenser 109 is provided with a water inlet and a water outlet, and the cooler 115 is also provided with a water inlet and a water outlet; the water inlet of the condenser 109 and the water inlet of the cooler are connected to the main water inlet pipe through a branch water inlet pipe, the main water inlet pipe is connected to the outlet of the water pump 107, and the inlet of the water pump 107 is connected to the water tank 126. The water outlet of the condenser 109 and the outlet of the cooler 115 are connected to the main water outlet pipe through a branch water pipe, and the main water outlet pipe is connected to the water tank 126.

[0024] When in use, the resin material is added into the melting tank 101, and then the heater 117 and the oil heater 120 installed on the oil tank 11 heat the oil in the jacket layer of the melting tank, and the resin material is heated from room temperature to 120°C ± 5°C through hot oil circulation, so that the raw material is completely melted, and the heater 117 on the melting tank assists in heating to make the raw material completely melted. After melting, the stirrer 102 starts to work under the drive of the stirring motor 105, stirs the auxiliary raw material evenly, and starts the vacuum dehydration device after stirring. The melting tank 101 is connected to the vacuum dehydration device through the dehydration pipe 111. During the vacuum dehydration process, some materials will be gasified and enter the vacuum dehydration device through the vacuum pipeline. Therefore, a condenser 109 is installed on the dehydration pipe 111. A cooling water circulation loop is designed inside the condenser 109. The gasified resin raw material is condensed into liquid material through circulating cooling water and refluxed to the melting tank 101. The condensation of the raw material can be checked through a peephole. After dehydration is completed, the exhaust valve 104 is opened to release the vacuum and introduce dry nitrogen. At the same time, the temperature of the heat transfer oil is adjusted to the operating temperature of 80°C±5°C. The pretreated finished raw materials are transported to the casting equipment or raw material barrel through the melting tank output pipeline 125.

[0025] like Figure 1 , 3 As shown in , 4, the vacuum dehydration device includes a vacuum buffer device and a vacuum pumping device. Figure 3As shown, the vacuum buffer device includes a vacuum buffer tank 203; the vacuum buffer tank 203 is a jacket tank, and the vacuum buffer tank 203 is connected to the melting tank 101 through a dehydration pipe 111. The jacket layer of the vacuum buffer tank 203 is provided with heat transfer oil, and the bottom of the jacket layer of the vacuum buffer tank 203 is provided with a heat transfer oil heater 202 and an oil temperature sensor 201; the oil temperature sensor 201 is used to measure the temperature of the oil in the jacket layer of the vacuum buffer tank 203. The bottom of the outer wall of the jacket layer of the vacuum buffer tank 203 is provided with an oil inlet hole, and the upper part of the outer wall of the jacket layer of the vacuum buffer tank 203 is provided with an oil outlet hole; the inlet of the heat transfer oil pump 209 is connected to the oil outlet hole through an oil return pipe, and the outlet of the heat transfer oil pump 209 is connected to the oil inlet hole through a pipeline. A vacuum gauge 204 is provided on the vacuum buffer tank 203.

[0026] like Figure 4 As shown, the vacuum pumping device includes a vacuum pump 305 and a vacuum tank 302. The vacuum tank 302 is provided with a vacuum tank temperature sensor 301, an air inlet and an air outlet. The air inlet is connected to the vacuum buffer tank 203 through a pipeline, and the air outlet is connected to the vacuum pump 305 through a pipeline. The vacuum tank temperature sensor 301 is used to measure the temperature of the gas in the vacuum tank 302. A cooling pipe 303 is provided in the vacuum tank 302. The inlet of the cooling pipe 303 is connected to the outlet of the water pump 307 through a pipeline. The outlet of the cooling pipe 303 is connected to the water tank 306 through a pipeline. The inlet of the water pump 307 is connected to the water tank 306 through a pipeline. The vacuum pump 305 is arranged in a sealed box 304. The box 304 is provided with a water inlet and a water outlet. The water inlet of the box 304 is connected to the pipeline connecting the inlet of the cooling pipe 303 to the water pump 307 through a water pipe, and the water outlet of the box 304 is connected to the pipeline connecting the outlet of the cooling pipe 303 to the water tank 306.

[0027] During operation, the vacuum buffer tank 203 starts to evacuate, and the vacuum degree is displayed by the vacuum meter 204. After the vacuum dehydration is completed, part of the gasified resin condenses into a solid in the vacuum buffer tank 203. At this time, the heat transfer oil in the jacket of the vacuum buffer tank 203 is heated by the heat transfer oil heater 202 to heat the material to a molten state and discharge it from the vacuum buffer tank 203. The cooling pipe 303 is used to cool the gas entering the vacuum pump 305.

Claims

1. A pretreatment device for thermoplastic nylon resin, characterized in that: It includes a melting device and a vacuum dehydration device; The melting device comprises a melting tank, an electronic scale and an oil tank; the melting tank is supported on the electronic scale, and the electronic scale is supported on the foundation; the melting tank is a jacketed tank, and a resin adding port, an exhaust valve, a dehydration pipe interface and a stirring motor are arranged on the cover plate of the melting tank; a stirrer is arranged in the melting tank, and the output shaft of the stirring motor is connected to the upper end of the stirrer; the dehydration pipe interface is connected to a vacuum dehydration device through a dehydration pipe; a condenser is arranged on the dehydration pipe; An oil inlet is provided at the bottom of the outer wall of the jacket layer of the melting tank; an oil outlet is provided at the upper part of the outer wall of the jacket layer of the melting tank, the inlet of the oil pump is connected to the oil tank through a pipeline, and the outlet of the oil pump is connected to the oil inlet through a pipeline; the oil outlet is connected back to the oil tank through an oil return pipe, and a cooler is provided on the oil return pipe; a heater is provided at the bottom of the jacket layer of the melting tank; the vacuum dehydration device can evacuate the melting tank and cool the gas entering the vacuum pump; The vacuum dehydration device comprises a vacuum buffer device and a vacuum pumping device; the vacuum buffer device comprises a vacuum buffer tank; the vacuum buffer tank adopts a jacket tank, and the vacuum buffer tank is connected with the melting tank through a dehydration pipe; the jacket layer of the vacuum buffer tank is provided with heat transfer oil, and the bottom of the jacket layer of the vacuum buffer tank is provided with a heat transfer oil heater; the bottom of the outer wall of the jacket layer of the vacuum buffer tank is provided with an oil inlet hole, and the upper part of the outer wall of the jacket layer of the vacuum buffer tank is provided with an oil outlet hole; the inlet of the heat transfer oil pump is connected to the oil outlet hole through an oil return pipe, and the outlet of the heat transfer oil pump is connected to the oil inlet hole through a pipeline; The vacuum pumping device comprises a vacuum pump and a vacuum tank. The vacuum tank is provided with an air inlet and an air outlet. The air inlet is connected to the vacuum buffer tank through a pipeline, and the air outlet is connected to the vacuum pump through a pipeline. A cooling pipe is provided in the vacuum tank. The inlet of the cooling pipe is connected to the outlet of the water pump through a pipeline. The outlet of the cooling pipe is connected to the water tank through a pipeline. The inlet of the water pump is connected to the water tank through a pipeline. The condenser is provided with a water inlet and a water outlet, and the cooler is also provided with a water inlet and a water outlet; the water inlet of the condenser and the water inlet of the cooler are connected to the main water inlet pipe through a branch water inlet pipe, the main water inlet pipe is connected to the outlet of the water pump, and the inlet of the water pump is connected to the water tank; the water outlet of the condenser and the outlet of the cooler are connected to the main water outlet pipe through a branch water pipe, and the main water outlet pipe is connected to the water tank.

2. The pretreatment device for thermoplastic nylon resin according to claim 1, characterized in that: The melting tank and the vacuum buffer tank are respectively provided with a melting tank vacuum gauge and a vacuum gauge; an oil heater is provided in the oil tank.

3. The pretreatment device for thermoplastic nylon resin according to claim 1, characterized in that: A temperature sensor is installed on the condenser; a hot oil circulation pressure gauge is provided on the pipeline connecting the oil pump outlet and the oil inlet; a heat transfer oil pressure gauge is provided on the pipeline connecting the heat transfer oil pump outlet and the oil inlet hole.

4. The pretreatment device for thermoplastic nylon resin according to claim 1, characterized in that: The vacuum pump is arranged in a sealed box, which is provided with a water inlet and a water outlet; the water inlet is connected to the pipe of the cooling pipe inlet connected to the water pump through a water pipe, and the water outlet is connected to the pipe of the cooling pipe outlet connected to the water tank.

5. The pretreatment device for thermoplastic nylon resin according to claim 1, characterized in that: The melting tank is provided with a resin temperature sensor and a jacket temperature sensor; the bottom of the jacket layer of the vacuum buffer tank is provided with an oil temperature sensor; and the vacuum tank is provided with a vacuum tank temperature sensor.

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