Continuous closed discharge device for polyimide resin and discharge method thereof

Abstract

The application discloses a continuous closed discharging device of polyimide resin and a discharging method thereof, which comprises a three-in-one device and a vacuum bin. The top of the three-in-one device is provided with a pressure transmitter, and the bottom end of the inside of the three-in-one device is provided with a reverse purging structure bottom plate. The top of the vacuum bin is provided with a dust interception filter stick, and the upper side of the dust interception filter stick on the top of the vacuum bin is provided with a vacuum generator. The feeding port of the vacuum bin is connected with the discharging port of the three-in-one device through a feeding hose. The application adopts the above-mentioned continuous closed discharging device of polyimide resin and the discharging method thereof. By changing the bottom plate structure of the three-in-one device, the reverse purging of the bottom plate gas can be realized. Meanwhile, the vacuum suction device is arranged outside, the floating resin is continuously sucked into the vacuum bin through the vacuum suction device, and the continuous closed discharging of the resin is realized.

Description

Technical Field

[0001] This invention belongs to the field of polyimide resin production technology, specifically relating to a continuous closed discharge device for polyimide resin and its discharge method. Background Technology

[0002] Polyimide resin is a polymer material with high heat resistance, excellent dielectric properties, and good mechanical strength. It has excellent mechanical properties, high temperature stability, chemical resistance, and electrical insulation properties, and is widely used in aerospace, electronics, automotive, medical and other fields.

[0003] Currently, after the polyimide resin is dried in the three-in-one equipment, it needs to be manually removed from the discharge port of the equipment. This not only makes it impossible to achieve continuous operation, but also makes the manual removal operation difficult, and there is a lot of material residue in the dead corners of the equipment, resulting in resin waste. Summary of the Invention

[0004] The purpose of this invention is to provide a continuous closed discharge device and method for polyimide resin. By changing the chassis structure of the three-in-one device, reverse blowing of the chassis gas can be achieved. At the same time, an external vacuum suction device is set up to continuously suck the floating resin into the vacuum hopper, thereby achieving continuous closed discharge of the resin.

[0005] To achieve the above objectives, the present invention provides a continuous closed discharge device for polyimide resin, comprising a three-in-one device and a vacuum hopper; the three-in-one device is equipped with a pressure transmitter at the top and a reverse purging structure chassis at the bottom of the interior; the vacuum hopper is equipped with a dust interception filter rod at the top, and a vacuum generator is located on the upper side of the dust interception filter rod at the top of the vacuum hopper; the inlet of the vacuum hopper and the outlet of the three-in-one device are connected in a sealed manner through a feed hose.

[0006] Preferably, the reverse purging structure chassis includes a metal filter screen, isolation plates, and a gas purging control valve; the bottom space of the metal filter screen is formed into several isolation chambers by several isolation plates; and a gas purging control valve is provided at the bottom of each isolation chamber.

[0007] Preferably, each of the gas purging control valves is connected to a pressure transmitter and a backflush gas control valve.

[0008] Preferably, the vacuum generator is equipped with a jet pump at the bottom and a jetting device at the top.

[0009] A continuous closed-circuit discharge method for polyimide resin includes the following steps:

[0010] S1. After the polyimide resin in the three-in-one equipment has dried to the required standard, keep the inside of the three-in-one equipment under vacuum. Move the vacuum hopper to the vicinity of the three-in-one equipment and connect the inlet of the vacuum hopper to the outlet of the three-in-one equipment in a sealed manner through the inlet hose.

[0011] S2. Turn on the vacuum generator at the top of the vacuum hopper and start the jet pump to keep the vacuum hopper under vacuum.

[0012] S3. Open the discharge port of the three-in-one device to connect the three-in-one device with the vacuum hopper;

[0013] S4. Open the backflush gas control valve. In the order of arrangement, the pressure transmitter controls the gas purging control valve to open in sequence and purge the isolation chamber in turn. The resin at the top of the isolation chamber is purged by gas and sucked into the vacuum hopper.

[0014] S5. The reverse blowing structure chassis in the three-in-one equipment is continuously pulsed and blown for a period of time until the polyimide resin on the reverse blowing structure chassis is blown clean and all of it enters the vacuum hopper. After that, the reverse blowing gas control valve and the gas blowing control valve are closed, and the vacuum hopper feed port is closed.

[0015] S6. Turn off the vacuum generator and open the vacuum hopper outlet. The polyimide resin discharge is complete.

[0016] Preferably, in step S4, the pressure transmitter controls the gas purging control valves to purge the isolation chamber in turn. Specifically, after the first gas purging control valve is opened, when the pressure of the three-in-one equipment increases significantly, the first gas purging control valve is closed. After the pressure inside the three-in-one equipment returns to vacuum, the second gas purging control valve is opened again.

[0017] The third and fourth gas purge control valves are opened and closed in sequence following the same opening and closing steps as the first and second gas purge control valves.

[0018] Therefore, the present invention adopts the above-mentioned continuous closed discharge device and discharge method for polyimide resin. By changing the chassis structure of the three-in-one equipment, the reverse blowing of the chassis gas can be realized. At the same time, a vacuum suction device is set externally. The floating resin is continuously sucked into the vacuum hopper through the vacuum suction device, thereby realizing the continuous closed discharge of resin.

[0019] The beneficial effects of this invention are:

[0020] 1. This invention connects the vacuum hopper with the three-in-one device to achieve closed discharge of polyimide resin material, which will not allow the polyimide resin material to be affected by the external environment and ensures the cleanliness of the polyimide resin material.

[0021] 2. By changing the structure of the three-in-one chassis, the present invention enables the chassis to be purged by gas pulse, which can thoroughly clean the polyimide resin material in the chassis, including the polyimide resin in the dead corners of the equipment, and can also achieve complete recovery, thereby improving the polyimide resin yield.

[0022] 3. This invention enables automatic and continuous discharge of polyimide resin through this discharge method, thereby saving labor and reducing costs.

[0023] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a continuous closed discharge device and discharge method for polyimide resin according to an embodiment of the present invention.

[0025] Figure Labels

[0026] 1. Three-in-one equipment; 2. Vacuum silo; 3. Pressure transmitter; 4. Dust interception filter rod; 5. Vacuum generator; 6. Feed hose; 7. Metal filter screen; 8. Isolation plate; 9. Gas purging control valve; 10. Isolation chamber; 11. Backflush gas control valve; 12. Jet pump; 13. Jet device. Detailed Implementation

[0027] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0029] Example

[0030] like Figure 1 As shown, a continuous closed discharge device for polyimide resin includes a three-in-one device 1 and a vacuum hopper 2. The inlet of the vacuum hopper 2 is connected to the outlet of the three-in-one device 1 in a closed manner via a feed hose 6. Connecting the vacuum hopper 2 to the three-in-one device 1 via the feed hose 6 enables closed discharge of polyimide resin material, preventing the material from being affected by the external environment and ensuring the cleanliness of the material.

[0031] The three-in-one device 1 has a pressure transmitter 3 at the top and a back-purge structure chassis at the bottom. The back-purge structure chassis includes a metal filter 7, isolation plates 8, and a gas purge control valve 9. The space at the bottom of the metal filter 7 is formed by several isolation plates 8 to form several independent isolation chambers 10. Each isolation chamber 10 has a gas purge control valve 9 at its bottom, and each gas purge control valve 9 is connected to the pressure transmitter 3 and the back-purge gas control valve 11, respectively.

[0032] By opening the backflush gas control valve 11 and detecting the pressure change inside the three-in-one equipment 1 through the pressure transmitter 3, the gas purging control valve 9 can be controlled to sequentially and alternately perform pulse purging on the polyimide resin on the backflush structure chassis. This can thoroughly clean the polyimide resin material on the chassis, including the polyimide resin in the dead corners of the equipment, and achieve complete recovery. This allows the polyimide resin to float inside the three-in-one equipment 1, thereby improving the yield of polyimide resin.

[0033] The top of the vacuum silo 2 is equipped with a dust interception filter rod 4, which prevents dust from being discharged with the airflow. A vacuum generator 5 is located above the dust interception filter rod 4 at the top of the vacuum silo 2. A jet pump 12 is located at the bottom of the vacuum generator 5, and a jetting device 13 is located at its top. Liquid is pressurized by the jet pump 12 and enters the jetting device 13, forming a continuous vacuum that can draw gas from the vacuum silo 2 into the vacuum generator 5 for discharge.

[0034] A continuous closed-circuit discharge method for polyimide resin includes the following steps:

[0035] S1. After the polyimide resin in the three-in-one equipment 1 has dried to a qualified standard, keep the inside of the three-in-one equipment 1 under vacuum; move the vacuum hopper 2 to the vicinity of the three-in-one equipment 1, and make the inlet of the vacuum hopper 2 connected to the outlet of the three-in-one equipment 1 in a sealed manner through the inlet hose 6.

[0036] S2. Open the vacuum generator 5 on the top of the vacuum hopper 2 and start the jet pump 12 to form a continuous vacuum suction force, so that the vacuum hopper 2 is kept under vacuum.

[0037] S3. Open the discharge port of the three-in-one device 1 to connect the three-in-one device 1 with the vacuum hopper 2.

[0038] S4. Open the backflush gas control valve 11. In the order of arrangement, the pressure transmitter 3 controls the gas purging control valve 9 to open in sequence and purge the isolation chamber 10 in turn. The resin at the top of the isolation chamber 10 is purged by the gas and floated into the vacuum hopper 2 with the airflow.

[0039] The pressure transmitter 3 controls the gas purging control valve 9 to purge the isolation chamber 10 in turn as follows: after the first gas purging control valve 9 is opened, when the pressure of the three-in-one equipment 1 increases significantly, the first gas purging control valve 9 is closed. After the pressure in the three-in-one equipment 1 returns to vacuum, the second gas purging control valve 9 is opened again. The third and fourth gas purging control valves 9 are opened and closed in sequence according to the steps of opening and closing the first and second gas purging control valves 9, thereby realizing the intermittent purging of the reverse purging structure chassis in turn.

[0040] S5. The reverse blowing structure chassis in the three-in-one equipment 1 is continuously pulsed and blown for a period of time until the polyimide resin on the reverse blowing structure chassis is blown clean and all enters the vacuum hopper 2. Then, the reverse blowing gas control valve 11 and the gas blowing control valve 9 are closed, and the inlet of the vacuum hopper 2 is closed.

[0041] S6. Turn off vacuum generator 5 and open the discharge port of vacuum hopper 2. The polyimide resin discharge is complete.

[0042] Therefore, the present invention adopts the above-mentioned continuous closed discharge device and discharge method for polyimide resin. By changing the chassis structure of the three-in-one equipment, the reverse blowing of the chassis gas can be realized. At the same time, a vacuum suction device is set externally. The floating resin is continuously sucked into the vacuum hopper through the vacuum suction device, thereby realizing the continuous closed discharge of resin.

[0043] 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 preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A continuous closed-loop discharge method for polyimide resin, comprising a continuous closed-loop discharge device for polyimide resin, the device including a three-in-one unit and a vacuum hopper; a pressure transmitter is provided on the top of the three-in-one unit, and a reverse-blowing structure chassis is provided at the bottom of the three-in-one unit; a dust interception filter rod is provided on the top of the vacuum hopper, and a vacuum generator is provided on the upper side of the dust interception filter rod; the inlet of the vacuum hopper and the outlet of the three-in-one unit are connected in a closed loop via a feed hose; the reverse-blowing structure chassis includes a metal filter screen, isolation plates, and a gas purging control valve; the bottom space of the metal filter screen is formed by several isolation plates to form several isolation chambers; each isolation chamber is provided with a gas purging control valve at its bottom; characterized in that: Includes the following steps: S1. After the polyimide resin in the three-in-one equipment has dried to the required standard, keep the inside of the three-in-one equipment under vacuum. Move the vacuum hopper to the vicinity of the three-in-one equipment and connect the inlet of the vacuum hopper to the outlet of the three-in-one equipment in a sealed manner through the inlet hose. S2. Turn on the vacuum generator at the top of the vacuum hopper and start the jet pump to keep the vacuum hopper under vacuum. S3. Open the discharge port of the three-in-one device to connect the three-in-one device with the vacuum hopper; S4. Open the backflush gas control valve. In the order of arrangement, the pressure transmitter controls the gas purging control valve to open in sequence and purge the isolation chamber in turn. The resin at the top of the isolation chamber is purged by gas and sucked into the vacuum hopper. S5. The reverse blowing structure chassis in the three-in-one equipment is continuously pulsed and blown for a period of time until the polyimide resin on the reverse blowing structure chassis is blown clean and all of it enters the vacuum hopper. After that, the reverse blowing gas control valve and the gas blowing control valve are closed, and the vacuum hopper feed port is closed. S6. Turn off the vacuum generator and open the vacuum hopper outlet. The polyimide resin discharge is complete. In S4, the pressure transmitter controls the gas purging control valves to open sequentially and purge the isolation chamber in turn. Specifically, after the first gas purging control valve is opened, when the pressure of the three-in-one equipment increases significantly, the first gas purging control valve is closed. After the pressure in the three-in-one equipment returns to vacuum, the second gas purging control valve is opened again. The third and fourth gas purge control valves are opened and closed in sequence following the same opening and closing steps as the first and second gas purge control valves.

2. The continuous closed discharge method for polyimide resin according to claim 1, characterized in that: Each of the gas purging control valves is connected to a pressure transmitter and a backflush gas control valve, respectively.

3. The continuous closed discharge method for polyimide resin according to claim 1, characterized in that: The vacuum generator is equipped with a jet pump at the bottom and a jetting device at the top.

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