Precise injection equipment

Abstract

The precision injection equipment comprises a rack, a glue injection tank, a power assembly and a heating assembly are arranged on the rack, a glue adding opening, a pressure pumping opening and a pressurizing opening are formed in the top of the glue injection tank, a glue outlet is formed in the bottom of the glue injection tank, the glue adding opening communicates with a material tank, the pressure pumping opening communicates with a vacuum pump, and a first pressure electromagnetic valve is arranged at the pressurizing opening; a flow electromagnetic valve is arranged at the glue outlet; the power assembly is used for conveying pressure into the glue injection tank, and the heating assembly is used for heating the glue injection tank; a detection assembly is further arranged and used for detecting the pressure, the resin liquid level and the temperature in the glue injection tank, so that the controller controls opening and closing of the first pressure electromagnetic valve and starting and stopping of the vacuum pump and the heating assembly. By arranging the detection assembly, the controller can control the first pressure electromagnetic valve, the vacuum pump and the heating assembly according to a detection signal, control over the pressure in the glue injection tank and automatic feeding and heating are achieved, meanwhile, the injection flow can be controlled by adjusting the opening degree of the flow electromagnetic valve, and then automatic accurate injection is achieved.

Description

Technical Field

[0001] The present application relates to the field of resin transfer molding technology, and in particular to a precision injection device. Background Art

[0002] The resin transfer molding process, as a liquid molding technology for resin-based composite materials, has the advantages of low cost, high production efficiency and high surface finish of the parts, and can mold near-net-size composite parts with complex appearance and structure. Its basic process is to pour liquid resin into a closed mold containing fiber reinforcement, and through the optimization design of resin flow channels and injection process parameters, the resin is fully infiltrated into the dry fiber reinforcement. After a specific curing process and demoulding, a near-net-size part with excellent surface quality is obtained. Most of the resin transfer molding processes in the prior art rely on manually controlled injection equipment for injection, which consumes manpower and is difficult to achieve precise control of the injection flow. Summary of the invention

[0003] The purpose of this application is to provide a precision injection device to solve the above problems, including: frame; A glue injection tank; the glue injection tank is arranged on the frame, the top of the glue injection tank is provided with a glue adding port, a pressure extraction port and a pressurization port, the bottom of the glue injection tank is provided with a glue outlet, the glue adding port is connected to a material tank, the pressure extraction port is connected to a vacuum pump, a first pressure solenoid valve is provided at the pressurization port, and a flow solenoid valve is provided at the glue outlet; A power assembly, the power assembly is arranged on the frame and is connected to the first pressure solenoid valve, and is used to deliver pressure into the glue injection tank so that the resin is discharged from the glue outlet; A heating component, which is arranged on the frame and is used to heat the glue injection tank; A detection component, which is arranged on the glue injection tank and is used to detect the pressure, resin liquid level and temperature in the glue injection tank, and generate corresponding first detection signals, second detection signals and third detection signals; A controller, the controller is electrically connected to the detection component, and is used to control the opening and closing of the first pressure solenoid valve, the start and stop of the vacuum pump and the heating component according to the first detection signal, the second detection signal and the third detection signal.

[0004] According to the technical solution provided in certain embodiments of the present application, the power assembly includes a pressurized tank, an input end of the pressurized tank is connected to a high-pressure gas source through a first air pipe, and an output end of the pressurized tank is connected to the first pressure solenoid valve through a second air pipe.

[0005] According to the technical solution provided in certain embodiments of the present application, the glue injection tank includes a cover body and a cylinder body that are detachably connected, the cover body is provided with the glue adding port, the pressure extraction port and the pressure adding port, and the bottom of the cylinder body is provided with the glue outlet. According to the technical solution provided in some embodiments of the present application, it also includes a lifting mechanism, which is arranged on the frame and has a driving end connected to the cover body, and is used to drive the cover body to move in a vertical direction so that the cover body and the cylinder body are engaged or separated with each other.

[0006] According to the technical solution provided in certain embodiments of the present application, it also includes a flipping mechanism, which includes a flipping platform, one end of which is rotatably connected to the frame, and the cylinder is fixed on the flipping platform; the flipping mechanism has a first state and a second state, when in the first state, the flipping platform extends in a horizontal direction; when in the second state, the flipping platform extends in a vertical direction.

[0007] According to the technical solution provided in certain embodiments of the present application, the detection component includes a first liquid level sensor, a second liquid level sensor, a pressure sensor and a temperature sensor. The first liquid level sensor is arranged on the side wall of the cylinder close to the opening end of the cylinder, the second liquid level sensor is arranged on the side wall of the cylinder close to the bottom of the cylinder, and the pressure sensor and the temperature sensor are arranged on the cover.

[0008] According to the technical solution provided in certain embodiments of the present application, a first cavity is provided between the inner wall and the outer wall of the cylinder, a first connection port and a second connection port are provided on the outer wall of the cylinder, and the heating assembly includes an oil temperature circulation heating mechanism, an input end of the oil temperature circulation heating mechanism is connected to the first connection port through a first oil pipe, and an output end thereof is connected to the second connection port through a second oil pipe.

[0009] According to the technical solution provided in certain embodiments of the present application, a stirring mechanism is also included, which includes a driving motor. The driving motor is fixed on the cover body, and the driving shaft of the driving motor vertically penetrates the cover body and extends into the cylinder body and is sleeved with stirring blades.

[0010] According to the technical solution provided in certain embodiments of the present application, it also includes a cleaning mechanism, which includes a high-pressure nozzle, and the high-pressure nozzle is arranged on the cover body. The cleaning mechanism can spray cleaning liquid into the glue injection tank through the high-pressure nozzle.

[0011] According to the technical solutions provided in certain embodiments of the present application, a pressure relief valve and a safety valve are also provided on the cover body.

[0012] Compared with the prior art, the present application has the following beneficial effects: the present application provides a precision injection device, including a frame, a glue injection tank is arranged on the frame, a glue adding port, a pressure extraction port and a pressurization port are arranged on the top of the glue injection tank, a glue outlet is arranged on the bottom, the glue adding port is connected to a material tank, the pressure extraction port is connected to a vacuum pump, a first pressure solenoid valve is arranged at the pressurization port, and a flow solenoid valve is arranged at the glue outlet; a power component and a heating component are also arranged on the frame, the power component is used to convey pressure into the glue injection tank so that the resin is discharged from the glue outlet; the heating component is used to heat the glue injection tank; the glue injection tank is also provided with a detection component for detecting the glue in the glue injection tank The controller can control the opening and closing of the first pressure solenoid valve, the start and stop of the vacuum pump and the heating component according to the first detection signal, the second detection signal and the third detection signal; by arranging the detection component on the injection tank, the controller can control the first pressure solenoid valve, the vacuum pump and the heating component according to the detection signal, so as to realize the control of the pressure in the injection tank and automatic loading and heating; at the same time, by adjusting the opening of the flow solenoid valve, the injection flow can be controlled, thereby realizing automatic and precise injection.

[0013] It should be understood that the description of technical features, technical solutions, beneficial effects or similar language in this application does not imply that all features and advantages can be realized in any single embodiment. On the contrary, it is understood that the description of features or beneficial effects means that specific technical features, technical solutions or beneficial effects are included in at least one embodiment. Therefore, the description of technical features, technical solutions or beneficial effects in this specification does not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions and beneficial effects described in the present embodiment can also be combined in any appropriate manner. Those skilled in the art will understand that the embodiment can be realized without one or more specific technical features, technical solutions or beneficial effects of a specific embodiment. In other embodiments, additional technical features and beneficial effects can also be identified in a specific embodiment that does not embody all embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 A front view of a precision injection device provided in an embodiment of the present application; Figure 2 A front view of a precision injection device provided in an embodiment of the present application; Figure 3 A cross-sectional schematic diagram of a precision injection device provided in an embodiment of the present application.

[0016] The text annotations in the figure represent: 1. Frame; 2. Glue injection tank; 3. Vacuum pump; 4. First pressure solenoid valve; 5. Flow solenoid valve; 6. Controller; 7. Lifting mechanism; 8. Flipping mechanism; 9. Resin delivery pipe; 10. Stirring mechanism; 11. High-pressure nozzle; 201. Cover body; 202. Cylinder body; 301. Pressurized tank; 302. First air pipe; 303. Second air pipe; 304. Second pressure solenoid valve; 401. First liquid level sensor; 402. Second liquid level sensor; 501. Oil temperature circulation heating mechanism; 502. First oil pipe; 503. Second oil pipe; 701. Slide rail; 702. First cylinder; 703. Sliding block; 801. Flipping platform; 802. Second cylinder. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the technical solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. The description in this section is only exemplary and explanatory and should not have any limiting effect on the protection scope of the present application. Specifically, the described embodiments are only embodiments of a part of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present invention.

[0018] It should be noted that similar reference numerals and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0019] As mentioned in the background technology, in view of the problems existing in the prior art, this embodiment provides a precision injection device, including: Rack 1; The glue injection tank 2 is arranged on the frame 1, and a glue adding port, a pressure extraction port and a pressurizing port are provided on the top of the glue injection tank 2, and a glue outlet is provided at the bottom thereof, the glue adding port is connected to a material tank, the pressure extraction port is connected to a vacuum pump 3, a first pressure solenoid valve 4 is provided at the pressurizing port, and a flow solenoid valve 5 is provided at the glue outlet; A power assembly is arranged on the frame 1 and is connected to the first pressure solenoid valve 4, and is used to deliver pressure to the glue injection tank 2 so that the resin is discharged from the glue outlet; A heating component is arranged on the frame 1 and is used to heat the glue injection tank 2; A detection component is disposed on the glue injection tank 2 and is used to detect the pressure, resin liquid level and temperature in the glue injection tank 2 and generate corresponding first detection signals, second detection signals and third detection signals; The controller 6 is electrically connected to the detection component and is used to control the opening and closing of the first pressure solenoid valve 4, the start and stop of the vacuum pump 3 and the heating component according to the first detection signal, the second detection signal and the third detection signal.

[0020] like Figure 1 As shown, the frame 1 is the carrier of the whole set of equipment. A plurality of universal wheels are arranged at the bottom of the frame 1 for easy movement. The glue injection tank 2 is approximately a cylindrical structure. The bottom of the glue injection tank 2 has an inclination. The glue outlet is arranged on the side wall of the glue injection tank 2 and corresponds to the lowest point of the bottom of the glue injection tank 2, which can effectively reduce the resin residue after injection; the output end of the flow solenoid valve 5 is connected with a resin delivery pipe 9 for injecting resin into the mold. The resin delivery pipe 9 adopts a disposable stainless steel braided hose. At the same time, the outside of the resin delivery pipe 9 is wrapped with a heating blanket, which can heat the resin flowing through the resin delivery pipe 9; the first pressure solenoid valve 4 is arranged at the top of the glue injection tank 2 and is connected to the power assembly. It can be used to measure the internal pressure of the glue injection tank 2 during use, so that the glue injection tank 2 can be injected under a stable pressure; the controller 6 adopts a PLC controller, and is electrically connected to a host computer and a display as the control terminal of the system.

[0021] The detection component is used to detect the pressure, resin liquid level and temperature in the glue injection tank 2. When the pressure in the glue injection tank 2 is lower than or higher than the set pressure, the controller 6 can control the first pressure solenoid valve 4 to close / open according to the first detection signal, thereby adjusting the internal pressure of the glue injection tank 2; when the resin in the glue injection tank 2 reaches a predetermined low liquid level, the controller 6 receives the second detection signal and closes the valves at the pressurization port and the glue outlet, opens the valves at the pressure extraction port and the glue injection port, and starts the vacuum pump 3 to extract and pressurize the inside of the glue injection tank 2, and the resin in the material tank enters the glue injection tank 2 from the glue injection port. When the resin in the glue injection tank 2 reaches a predetermined high liquid level, the controller 6 receives the second detection signal again and closes the valve at the glue injection port. The vacuum pump 3 continues to work to vacuum degas the resin in the glue injection tank 2, and the vacuum pump 3 and the valve at the pressure extraction port are closed after a period of time; when the temperature in the glue injection tank 2 is lower than or higher than the set temperature, the controller 6 can control the heating component to start / stop according to the third detection signal, thereby making the resin in the glue injection tank 2 have a relatively constant temperature.

[0022] By setting a detection component on the glue injection tank 2, the controller 6 can control the first pressure solenoid valve 4, the vacuum pump 3 and the heating component according to the detection signal to achieve control of the pressure in the glue injection tank 2 as well as automatic loading and heating. At the same time, by adjusting the opening of the flow solenoid valve 5, the injection flow rate can be controlled, thereby achieving automated and precise injection.

[0023] In a preferred embodiment, the power assembly includes a pressurized tank 301 , the input end of the pressurized tank 301 is connected to a high-pressure gas source through a first air pipe 302 , and the output end of the pressurized tank 301 is connected to a first pressure solenoid valve 4 through a second air pipe 303 .

[0024] like Figure 1 As shown, a nitrogen bottle is selected as the power gas source of the present application, and the nitrogen bottle is connected to the pressurized tank 301 through a first air pipe 302. A second pressure solenoid valve 304 is also provided between the first air pipe 302 and the pressurized tank 301, which is used to control the connection or interruption of the first air pipe 302 according to the pressure in the pressurized tank 301. A pressure regulating valve is provided on the pressurized tank 301, and the pressure in the pressurized tank 301 is set by the pressure regulating valve. First, the gas in the nitrogen bottle is passed into the pressurized tank 301. When the gas pressure in the pressurized tank 301 reaches the set pressure of the pressure regulating valve, the gas in the pressurized tank 301 is passed from the second air pipe 303 through the first pressure solenoid valve 304 into the injection tank 2, which can effectively avoid the disadvantage of insufficient stability when using air pressure as a power source. At the same time, compared with the traditional method of motor-driven piston rod or screw, compressed gas adopts non-contact method to push resin for injection, so as to prevent the resin from corroding or clogging the mechanical structure of the power device during use.

[0025] In a preferred embodiment, the glue injection tank 2 includes a cover body 201 and a cylinder body 202 which are detachably connected. The cover body 201 is provided with a glue adding port, a pressure extraction port and a pressure adding port, and the bottom of the cylinder body 202 is provided with a glue outlet. like Figure 1 As shown, the cover body 201 and the open end of the cylinder body 202 are connected by flanges and bolts, and the connection is sealed with a chlorinated rubber ring to prevent pressure leakage. At the same time, a pressure gauge is provided on the cover body 201 to facilitate users to monitor the internal pressure of the glue injection tank 2 at any time.

[0026] In a preferred embodiment, a lifting mechanism 7 is further included. The lifting mechanism 7 is disposed on the frame 1, and a driving end of the lifting mechanism 7 is connected to the cover body 201 for driving the cover body 201 to move in a vertical direction so that the cover body 201 and the cylinder body 301 are engaged with or separated from each other.

[0027] like Figure 2As shown, the lifting mechanism 7 includes a slide rail 701 and a first cylinder 702. The slide rail 701 is fixed on the frame 1 and extends in the vertical direction. The first cylinder 702 is fixed on one side of the slide rail 701 and a slider 703 is sleeved on its gas rod. The slider 703 is fixed to the cover body 201 and slidably cooperates with the slide rail 701. The cover body 201 and the cylinder body 202 can be disconnected by removing the bolts, and the first cylinder 702 is started. The gas rod of the first cylinder 702 drives the slider 703 to move along the slide rail 701, thereby driving the cover body 201 and the cylinder body 202 to separate from each other.

[0028] In a preferred embodiment, it also includes a flipping mechanism 8, which includes a flipping platform 801, one end of which is rotatably connected to the frame 1, and a cylinder 202 is fixed on the flipping platform 801; the flipping mechanism 8 has a first state and a second state, when in the first state, the flipping platform 801 extends in the horizontal direction; when in the second state, the flipping platform 801 extends in the vertical direction.

[0029] like Figure 1 As shown, one end of the flipping platform 801 away from the lifting mechanism 7 is rotatably connected to the frame 1, and the flipping mechanism 8 also includes a second cylinder 802. The two second cylinders 802 are respectively inclined on both sides of the frame 1 at an angle to the vertical direction, one end of which is rotatably connected to the bottom of the frame 1, and the other end is rotatably connected to the bottom of the flipping platform 801; initially, the flipping platform 801 extends in the horizontal direction, and the open end of the cylinder 202 faces directly upward. At this time, the flipping mechanism 8 is in the above-mentioned first state, and the two second cylinders 802 are started. The gas rods of the two second cylinders 802 extend synchronously along their length directions, and then support the flipping platform 801 to rotate around the rotation axis, and at the same time drive the cylinder 202 to flip, and finally make the open end of the cylinder 202 face the side away from the lifting mechanism 7. At this time, the flipping mechanism 8 is in the above-mentioned second state. By setting the flipping mechanism 8, the cylinder 202 can be flipped after the cover 201 is separated from the cylinder 202, so as to facilitate the cleaning of the inside of the glue injection tank 2 and avoid the influence of resin residue on the use.

[0030] In a preferred embodiment, the detection component includes a first liquid level sensor 401, a second liquid level sensor 402, a pressure sensor and a temperature sensor. The first liquid level sensor 401 is arranged on the side wall of the cylinder 202 near the opening end of the cylinder 202, the second liquid level sensor 402 is arranged on the side wall of the cylinder 401 near the bottom of the cylinder 401, and the pressure sensor and the temperature sensor are arranged on the cover 201.

[0031] like Figure 1 and Figure 3As shown, the first liquid level sensor 401 and the second liquid level sensor 402 adopt tuning fork liquid level sensors in the prior art, and are respectively arranged on the side wall of the cylinder 202 near the opening end and near the bottom, that is, the above-mentioned predetermined high liquid level and low liquid level positions, for detecting the resin liquid level inside the glue injection tank 2. In this embodiment, an ultrasonic liquid level sensor is also provided on the cover body 201, which is also used to detect the resin liquid level inside the glue injection tank 2; the pressure sensor and temperature sensor of the cover body 201 are respectively used to monitor the pressure and temperature inside the glue injection tank 2.

[0032] In a preferred embodiment, there is a first cavity between the inner wall and the outer wall of the cylinder 202, and a first connection port and a second connection port are opened on the outer wall of the cylinder 202. The heating component includes an oil temperature circulation heating mechanism 501, and the input end of the oil temperature circulation heating mechanism 501 is connected to the first connection port through a first oil pipe 502, and the output end thereof is connected to the second connection port through a second oil pipe 503.

[0033] like Figure 1 As shown, the oil temperature circulation heating mechanism 501 adopts the oil temperature heating system in the prior art, including an oil pump and a heating device for conveying heat transfer oil. When in use, the oil pump and the heating device are started, and the heating device heats the heat transfer oil in the oil tank. Driven by the oil pump, the heat transfer oil enters the first cavity from the second connection port through the second oil pipe 503, and then is conveyed back to the oil tank from the first connection port through the first oil pipe 502, thereby realizing the circulation heating of the injection tank 2. At the same time, the resin is heated by the flowing heat transfer oil in the first cavity, so that the resin can be heated evenly.

[0034] In a preferred embodiment, a stirring mechanism 10 is further included. The stirring mechanism 10 includes a driving motor fixed on the cover 201. The driving shaft of the driving motor vertically penetrates the cover 201 and extends into the cylinder 202 and is provided with stirring blades.

[0035] like Figure 3 As shown, the driving motor adopts a stepping motor commonly used in the prior art, and its driving shaft passes through the cover body 201 in the vertical direction and extends into the cylinder body 202 and is sleeved with a stirring blade; when the driving motor is started, the driving motor drives the stirring blade to rotate around its axis to stir the resin in the injection tank 2, thereby ensuring that the resin always maintains a uniform concentration during the injection process.

[0036] In a preferred embodiment, a cleaning mechanism is further included. The cleaning mechanism includes a high-pressure nozzle 11 . The high-pressure nozzle 11 is disposed on the cover body 201 . The cleaning mechanism can spray cleaning liquid into the glue injection tank 2 through the high-pressure nozzle 11 .

[0037] like Figure 3As shown, the high-pressure nozzle 11 is arranged on the cover body 201, and its input end is connected to the cleaning liquid storage tank and the air pump; after the injection is completed, the cleaning liquid in the cleaning liquid storage tank can be sprayed into the glue injection tank 2 through the high-pressure nozzle 11 through the air pump, thereby cleaning the glue injection tank 2.

[0038] In a preferred embodiment, the cover body 201 is also provided with a pressure relief valve and a safety valve.

[0039] like Figure 1 As shown, the pressure relief valve is used to release the pressure inside the glue injection tank 2, and the safety valve can prevent the internal pressure of the glue injection tank 2 from exceeding the maximum pressure that the glue injection tank 2 can withstand, thereby avoiding damage to the glue injection tank 2.

[0040] Working principle: When in use, first set the opening of the flow solenoid valve 5 through the controller 6, start the heating component to preheat the glue injection tank 2, when the temperature in the glue injection tank 2 reaches or is lower than the set temperature, the controller 5 can control the heating component to stop or start according to the third detection signal generated by the temperature sensor, so that the resin in the glue injection tank 2 has a relatively constant temperature; open the valves at the pressure extraction port and the glue feeding port and start the vacuum pump 3 to extract and pressurize the inside of the glue injection tank 2, and the resin in the material tank enters the glue injection tank 2 from the glue feeding port. When the resin in the glue injection tank 2 reaches a predetermined high liquid level, the controller 6 receives the second detection signal and closes the valve at the glue feeding port, and the vacuum pump 3 continues to work to inject glue. 2 is vacuum degassed, and after a period of time, the vacuum pump 3 and the valve at the pressure extraction port are closed; the valve of the nitrogen bottle is opened to allow the gas to enter the pressurized tank 301 through the second pressure solenoid valve 304. When the pressure in the pressurized tank 301 reaches the set pressure value of the pressure regulating valve, the valve at the pressurized port is opened to allow the gas to enter the glue injection tank 2, and the valve at the glue outlet is opened at the same time. The resin in the glue injection tank 2 is injected into the mold through the resin delivery pipe 9 under pressure. During the injection process, the pressure in the glue injection tank 2 is monitored by the pressure sensor. At the same time, the controller 6 can control the first pressure solenoid valve 4 and the pressure relief valve according to the first detection signal generated by the pressure sensor, so that a stable pressure is always maintained in the glue injection tank 2.

[0041] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A precision injection device, characterized in that: include: Rack(1); A glue injection tank (2); the glue injection tank (2) is arranged on the frame (1); a glue feeding port, a pressure extraction port and a pressurization port are provided on the top of the glue injection tank (2); a glue outlet is provided on the bottom; the glue feeding port is connected to a material tank; the pressure extraction port is connected to a vacuum pump (3); a first pressure solenoid valve (4) is provided at the pressurization port; and a flow solenoid valve (5) is provided at the glue outlet; A power assembly, the power assembly being arranged on the frame (1) and being in communication with the first pressure solenoid valve (4), and being used for delivering pressure into the glue injection tank (2) so that the resin is discharged from the glue outlet; A heating component, the heating component is arranged on the frame (1) and is used to heat the glue injection tank (2); a detection component, the detection component being arranged on the glue injection tank (2) and being used to detect the pressure, resin liquid level and temperature in the glue injection tank (2), and to generate corresponding first detection signals, second detection signals and third detection signals; A controller (6), the controller (6) being electrically connected to the detection component and being used to control the opening and closing of the first pressure solenoid valve (4), the start and stop of the vacuum pump (3) and the heating component respectively according to the first detection signal, the second detection signal and the third detection signal.

2. A precision injection device according to claim 1, characterized in that: The power assembly comprises a pressurized tank (301), the input end of the pressurized tank (301) being connected to a high-pressure gas source via a first gas pipe (302), and the output end of the pressurized tank (301) being connected to the first pressure solenoid valve (4) via a second gas pipe (303).

3. A precision injection device according to claim 1, characterized in that: The glue injection tank (2) comprises a detachably connected cover body (201) and a barrel body (202); the cover body (201) is provided with the glue adding port, the pressure extraction port and the pressure adding port; and the bottom of the barrel body (202) is provided with the glue outlet.

4. A precision injection device according to claim 3, characterized in that: It also comprises a lifting mechanism (7), wherein the lifting mechanism (7) is arranged on the frame (1), and a driving end of the lifting mechanism (7) is connected to the cover body (201) and is used to drive the cover body (201) to move in a vertical direction so that the cover body (201) and the cylinder body (202) are engaged with or separated from each other.

5. A precision injection device according to claim 3, characterized in that: The invention also comprises a turning mechanism (8), wherein the turning mechanism (8) comprises a turning platform (801), one end of the turning platform (801) is rotatably connected to the frame (1), and the cylinder (202) is fixed on the turning platform (801); the turning mechanism (8) has a first state and a second state; when in the first state, the turning platform (801) extends in a horizontal direction; when in the second state, the turning platform (801) extends in a vertical direction.

6. A precision injection device according to claim 3, characterized in that: The detection component comprises a first liquid level sensor (401), a second liquid level sensor (402), a pressure sensor and a temperature sensor; the first liquid level sensor (401) is arranged on a side wall of the cylinder (202) close to an opening end of the cylinder (202); the second liquid level sensor (402) is arranged on a side wall of the cylinder (202) close to a bottom of the cylinder (202); and the pressure sensor and the temperature sensor are arranged on the cover (201).

7. A precision injection device according to claim 3, characterized in that: A first cavity is provided between the inner wall and the outer wall of the cylinder (202); a first connection port and a second connection port are provided on the outer wall of the cylinder (202); the heating component comprises an oil temperature circulation heating mechanism (501); an input end of the oil temperature circulation heating mechanism (501) is connected to the first connection port via a first oil pipe (502); and an output end of the oil temperature circulation heating mechanism (501) is connected to the second connection port via a second oil pipe (503).

8. A precision injection device according to claim 3, characterized in that: It also comprises a stirring mechanism (10), the stirring mechanism (10) comprising a driving motor, the driving motor being fixed on the cover body (201), the driving shaft of the driving motor penetrating the cover body (201) in a vertical direction and extending into the cylinder body (202) and being sleeved with stirring blades.

9. A precision injection device according to claim 3, characterized in that: It also comprises a cleaning mechanism, the cleaning mechanism comprising a high-pressure nozzle (11), the high-pressure nozzle (11) being arranged on the cover body (201), and the cleaning mechanism can spray cleaning liquid into the glue injection tank (2) through the high-pressure nozzle (11).

10. A precision injection device according to claim 3, characterized in that: The cover body (201) is also provided with a pressure relief valve and a safety valve.

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