CN109719972B - Resin injection device for preparing composite pipe fitting and control method - Google Patents
Resin injection device for preparing composite pipe fitting and control method Download PDFInfo
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- CN109719972B CN109719972B CN201910076250.6A CN201910076250A CN109719972B CN 109719972 B CN109719972 B CN 109719972B CN 201910076250 A CN201910076250 A CN 201910076250A CN 109719972 B CN109719972 B CN 109719972B
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Abstract
The invention relates to a resin injection device for preparing a composite pipe fitting and a control method thereof, wherein the device comprises a heating barrel, a servo motor, a stirrer, an electromagnetic valve, a heating wire, a barrel cover, a mold and a heating rod; wherein the stirrer is pivoted in the heating barrel and is connected with the servo motor; the electromagnetic valve is connected to the upper part of the heating barrel; the heating wire surrounds the inner wall of the heating barrel and is fixed; the barrel cover is fixed on the heating barrel; the bottom of the heating barrel is connected with a pipeline connected with the die, and a flow monitor is arranged on the pipeline; an air bag is covered in the die; the die is connected with a water flow electromagnetic valve; the heating rods are arranged at four corners of the inlet of the die. The invention can better control the pressure ratio between the resin and the mandrel, reduce the influence of temperature on the pressure of the air bag, improve the shape type capability of the component which can be adapted to the deformable air bag, increase the precision of the finished product and enable the process setting to be more automatic.
Description
[ field of technology ]
The invention relates to a resin injection device and a control method for manufacturing a composite pipe fitting, in particular to a resin injection device and a control method for manufacturing a composite pipe fitting, and belongs to the technical field of processing of fabric reinforced composite components.
[ background Art ]
With the development of composite related technologies, composite members having high specific strength, specific modulus and good corrosion resistance are being gradually accepted in the market. In order to be able to be integrated into various types of complete machines, it is necessary to be able to machine composite components having a profiled structure.
The deformable air bag is a technological means for processing special-shaped composite pipe fittings, and the fiber reinforced layer is laid on the surface of the air bag, and is placed into a profile die, and after resin is injected, the air bag is solidified to obtain the profile which is suitable for the die. In this process, there are the following problems: 1) The ratio of the inflation pressure in the air bag to the resin injection pressure. In order to obtain a good injection speed, a certain pressure needs to be applied to the injected resin, and if the pressure is too high, the air bag is compressed, so that the fiber volume content of the component is reduced; if the pressure is too low, the fluidity of the resin is affected, and a cavitation area in the component is easily caused; 2) The flowability of the resin also has a certain relationship with temperature. Too low a temperature may cause poor fluidity of the resin, and too high a temperature may cause a decrease in strength of the resin after curing molding. The curing temperature after the completion of the filling also has a great influence on the strength after the resin molding, and therefore, it is a very important part of the temperature control during the curing.
Accordingly, to solve the above-mentioned problems, it is necessary to provide an innovative resin injection apparatus and control method for preparing composite pipe members to overcome the drawbacks of the prior art.
[ invention ]
In order to solve the above problems, an object of the present invention is to provide a resin injection apparatus for manufacturing a composite pipe, which can better control the pressure ratio between the resin and the mandrel, reduce the influence of temperature on the pressure of the air bag, improve the shape type capability of the member to which the deformable air bag can adapt, increase the precision of the finished product, and make the process setting more automated.
A second object of the present invention is to provide a control method of a resin injection apparatus for manufacturing a composite pipe.
In order to achieve the first object, the present invention adopts the following technical scheme: a resin injection device for preparing a composite pipe fitting comprises a heating barrel, a servo motor, a stirrer, an electromagnetic valve, a heating wire, a barrel cover, a mold and a heating rod; wherein the stirrer is pivoted in the heating barrel and is connected with the servo motor; the electromagnetic valve is connected to the upper part of the heating barrel; the heating wire surrounds the inner wall of the heating barrel and is fixed; the barrel cover is fixed on the heating barrel; the bottom of the heating barrel is connected with a pipeline connected with the die, and a flow monitor is arranged on the pipeline; an air bag is covered in the die; the die is connected with a water flow electromagnetic valve; the heating rods are arranged at four corners of the inlet of the die.
The resin injection apparatus for preparing a composite pipe fitting of the present invention further comprises: a temperature detector I is arranged in the heating barrel; the barrel cover is fixedly provided with a pressure detector I and an infrared detector.
The resin injection apparatus for preparing a composite pipe fitting of the present invention further comprises: and a temperature detector II and a pressure detector II are arranged on the die.
The resin injection apparatus for preparing composite pipe fittings of the present invention is also: the system comprises a signal processing control system, a control computer, a temperature controller and a pressure controller, wherein the signal processing control system comprises automatic temperature control and pressure control injection software, and a numerical control code compiler of the braiding integrated device; the automatic temperature control and pressure control injection software is connected with the numerical control code compiler of the braiding integrated device and the control computer in sequence; the temperature controller, the pressure controller and the infrared detector are respectively connected with the flow monitor; the pressure detector I, II is electrically connected to the pressure controller; the pressure detector I controls an electromagnetic valve; the temperature detector I, II is electrically connected to the temperature controller; the temperature detector I, II controls the heating wire and the heating rod, respectively.
In order to achieve the second object, the invention adopts the following technical scheme: a control method for a resin injection apparatus for preparing a composite pipe, comprising the steps of:
1) The resin is sent into a heating barrel, and when the resin reaches a certain amount, the resin is detected to stop adding the resin at the moment;
2) Heating by an electric heating wire and uniformly stirring by a stirrer; the temperature detector I at the bottom of the heating barrel always detects the resin temperature and transmits the resin temperature to the control system;
3) When the temperature is heated to a certain temperature, the temperature detector I sends a signal to the control system to stop heating the heating wire until the temperature is reduced to a preset value; controlling the electromagnetic valve to introduce air pressure, at the moment, injecting resin into the mould, and once the temperature is reduced, heating the resin again to the designated temperature by the heating wire, wherein the stirrer is always operated during operation;
4) When resin needs to be injected, the first injection switch is manually controlled, and the resin outlet electromagnetic valve allows the resin to be injected; detecting flow and comparing with the pressure and temperature in the barrel during injection, and alarming and closing the electromagnetic valve to stop injection when the flow does not accord with the prediction; injecting resin in the subsequent work, and automatically starting resin injection after demolding is finished and all readiness is finished;
5) When the inner core pressure detector I reaches a certain value, a signal is transmitted to a control system to open the electromagnetic valve so as to allow the resin to flow out;
6) Stopping injection by controlling the pressure detector II, and stopping injection when the pressure reaches a certain value and transmitting the pressure to a control computer; the control computer opens the solenoid valve for controlling water flow to charge the heated water into the mold core, after which the hot water heats the resin together with the mold; excess resin in the die is extruded out from a resin outlet of the die, and when the pressure of the inner core reaches a certain value, a signal is transmitted to a control system by a pressure detector of the inner core to stop filling hot water;
7) When the inner core of the die stops filling hot water, an outlet valve of the die is closed and resin is solidified; after curing is completed, the demolding control system controls the resin injection switch to work so as to repeat the above actions;
8) When the resin in the heating barrel is lowered to a preset value; the control system can complete the injection molding and close the resin outlet on the mold in the resin curing process; the control system controls the electromagnetic valve to be opened to release the pressure in the barrel, and resin is injected into the barrel, and at the moment, the temperature detector transmits a signal to the control system to start heating; when the resin volume reaches a preset value, the electromagnetic valve is closed to stop injecting resin, the electromagnetic valve from which the gas flows out is closed, the electromagnetic valve for controlling the inflow gas is opened to pressurize the barrel, and the operation can be continued after the completion.
Compared with the prior art, the invention has the following beneficial effects:
1. the air bag of the resin injection device for preparing the composite pipe fitting can adapt to the shape requirements of various large curvature changes, the mold can be internally heated, the mold core with controllable pressure can be used repeatedly by resin, and pressure feedback can be provided, so that the curing process of the special-shaped section pipe is more intelligent and controllable, more efficient, the controllability and stability of pressure proportioning are improved, the influence of the mold temperature on air pressure is reduced, the heating speed is increased, the energy loss is reduced, the production cost is reduced, and the finished product can meet the special-shaped inner wall requirements of large curvature;
2. the resin injection device for preparing the composite pipe fitting takes water as a temperature and pressure transmission medium, so that the defects of easiness in temperature influence and slow pressure injection when gas is taken as a medium are overcome; meanwhile, the control of the temperature of the inner core also reduces the manufacturing time of the reinforced pipe in the manufacturing process and obtains more excellent mechanical properties.
[ description of the drawings ]
Fig. 1 is a schematic view of the structure of a heating barrel of a resin injection apparatus for manufacturing composite pipe fittings of the present invention.
Fig. 2 is a schematic structural view of a mold of a resin injection apparatus for manufacturing a composite pipe according to the present invention.
Fig. 3 is a control schematic of the resin injection apparatus for preparing composite pipe according to the present invention.
[ detailed description ] of the invention
Referring to fig. 1 to 3 of the drawings, the present invention is a resin injection apparatus for preparing a composite pipe, which comprises a heating barrel 2, a servo motor 11, a stirrer 10, a solenoid valve 5, a heating wire 4, a barrel cover 7, a mold 24, a heating rod 15, and the like.
Wherein, a temperature detector I3 for detecting the temperature of the resin in the heating barrel 2 is arranged in the heating barrel 2.
The stirrer 10 is pivoted in the heating barrel 2 and connected with a servo motor 11, and the servo motor 11 drives the stirrer 10 to rotate, so that the resin in the heating barrel 2 is uniformly stirred.
The solenoid valve 5 is connected to the upper portion of the heating tub 2. The heating wire 4 is wound around the inner wall of the heating tub 2 and fixed, and is capable of heating the resin.
The barrel cover 7 is fixed on the heating barrel 2. The barrel cover 7 is fixedly provided with a pressure detector I6 and an infrared detector 8.
The bottom of the heating barrel 2 is connected with a pipeline 12 connected with a die 24, and the pipeline 12 is provided with a flow monitor 1.
The air bag 17 is covered in the die 24, and water can be filled in the air bag 17. The die 24 is provided with a temperature detector II14 and a pressure detector II13. The die 24 is connected with a water flow electromagnetic valve 25.
The heating bars 15 are installed at four corners of the inlet of the mold 24, and heat the injected resin.
The resin injection device for preparing the composite pipe fitting further comprises a signal processing control system 21, wherein automatic temperature control and pressure control injection software 18, a braiding integrated device numerical control code compiler 19, a control computer 20, a temperature controller 22 and a pressure controller 23 are integrated in the signal processing control system 21.
The automatic temperature control and pressure control injection software 18, the braiding integrated device numerical control code compiler 19 and the control computer 20 are connected in sequence. The temperature controller 22, the pressure controller 23 and the infrared detector 8 are respectively connected with the control computer 20, and the flow monitor 1 is controlled by the control computer 20. The pressure detectors I, II, 13 are electrically connected to the pressure controller 23; the pressure detector I6 controls the solenoid valve 5. The temperature detectors I, II, 14 are electrically connected to the temperature controller 22; the temperature detectors I, II, 14 control the heater wire 4 and the heater rod 15, respectively.
The control method of the resin injection device for preparing the composite pipe fitting comprises the following steps:
1) The resin is fed into the heating barrel 2, and when the resin reaches a certain amount, the resin is detected by the infrared detector, and the resin is stopped being added at the moment;
2) The resin is heated by the heating wire 4 and is uniformly stirred by the stirrer 10; the temperature detector I3 at the bottom of the heating tub will always detect the resin temperature and transmit the resin temperature to the control system 21;
3) When the temperature is heated to a certain temperature, the temperature detector I3 sends a signal to the control system 21 to stop heating the heating wire 4 until the temperature is reduced to a preset value; and controlling the solenoid valve 5 to introduce air pressure, at which time resin injection into the mold can be started, and once the temperature is reduced, the heating wire 4 will heat the resin again to the designated temperature, and the stirrer 10 will be operated all the time during operation;
4) When resin needs to be injected, the first injection switch is manually controlled, and the solenoid valve 5 allows the resin to be injected; detecting flow and comparing with the pressure and temperature in the barrel during injection, and alarming and closing the electromagnetic valve 5 to stop injection when the flow does not accord with the prediction; injecting resin in the subsequent work, and automatically starting resin injection after demolding is finished and all readiness is finished;
5) When the pressure detector I6 reaches a certain value, a signal is transmitted to the control system 21 to open the electromagnetic valve 5 so as to allow the resin to flow out;
6) When the pressure reaches a certain value, the injection is stopped and communicated to the control computer 20; the control computer 20 opens the control water flow solenoid valve 25 to charge the heated water into the core of the mold 24, after which the hot water heats the resin together with the mold; excess resin in the die is extruded from a resin outlet of the die, and when the pressure of the inner core reaches a certain value, a signal is transmitted to the control system 21 by the pressure detector II14 of the inner core to stop filling hot water;
7) When the hot water is stopped from being filled into the inner core of the die 24, the outlet valve of the die is closed and the resin starts to be cured; after curing is completed, the demolding control system controls the resin injection switch to work so as to repeat the above actions;
8) When the resin in the heating barrel 2 is lowered to a preset value; the control system 21 will complete this injection and after closing the resin outlet on the mold during the resin curing process; the control system 21 controls the electromagnetic valve 5 to be opened to release the pressure in the barrel, and resin starts to be injected into the barrel, and at the moment, the temperature detector 3 transmits a signal to the control system to start heating; when the resin volume reaches a preset value, the electromagnetic valve 5 is closed to stop injecting resin, the electromagnetic valve for controlling the gas to flow out is closed, the electromagnetic valve 5 for controlling the gas to flow in is opened to pressurize the barrel, and the operation can be continued after the completion.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention, but any modifications, equivalent substitutions, improvements, etc. within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (1)
1. A control method for a resin injection apparatus for producing composite pipe fittings, characterized by: the resin injection device for preparing the composite pipe fitting comprises a heating barrel, a servo motor, a stirrer, an electromagnetic valve, a heating wire, a barrel cover, a mold and a heating rod; wherein the stirrer is pivoted in the heating barrel and is connected with the servo motor; the magnetic valve is connected to the upper part of the heating barrel; the heating wire surrounds the inner wall of the heating barrel and is fixed; the barrel cover is fixed on the heating barrel; the bottom of the heating barrel is connected with a pipeline connected with the die, and a flow monitor is arranged on the pipeline; an air bag is covered in the die; the die is connected with a water flow electromagnetic valve; the heating rods are arranged at four corners of an inlet of the die;
a temperature detector I is arranged in the heating barrel; the barrel cover is fixedly provided with a pressure detector I and an infrared detector; the die is provided with a temperature detector II and a pressure detector II;
the resin injection device for preparing the composite pipe fitting further comprises a signal processing control system, wherein the signal processing control system comprises automatic temperature control and pressure control injection software, a braiding integrated device numerical control code compiler, a control computer, a temperature controller and a pressure controller; the automatic temperature control and pressure control injection software is connected with the numerical control code compiler of the braiding integrated device and the control computer in sequence; the temperature controller, the pressure controller and the infrared detector are respectively connected with the flow monitor; the pressure detector I, II is electrically connected to the pressure controller; the pressure detector I controls an electromagnetic valve and a water flow electromagnetic valve; the temperature detector I, II is electrically connected to the temperature controller; the temperature detector I, II is used for respectively controlling the heating wire and the heating rod;
the control method comprises the following steps:
1) The resin is sent into the heating barrel, and when the resin reaches a certain amount, the resin is detected by the infrared detector, and the resin is stopped being added at the moment;
2) The resin is heated by the electric heating wire and is uniformly stirred by the stirrer; the temperature detector I at the bottom of the heating barrel always detects the resin temperature and transmits the resin temperature to the control system;
3) When the temperature is heated to a certain temperature, the temperature detector I sends a signal to the control system to stop heating the heating wire until the temperature is reduced to a preset value; controlling the electromagnetic valve to introduce air pressure, at the moment, injecting resin into the mould, and once the temperature is reduced, heating the resin again to the designated temperature by the heating wire, wherein the stirrer is always operated during operation;
4) When resin needs to be injected, the first injection switch is manually controlled, and the solenoid valve allows the resin to be injected; detecting flow and comparing with the pressure and temperature in the barrel during injection, and alarming and closing the electromagnetic valve to stop injection when the flow does not accord with the prediction; injecting resin in the subsequent work, and automatically starting resin injection after demolding is finished and all readiness is finished;
5) When the pressure detector reaches a certain value, a signal is transmitted to a control system to open the electromagnetic valve so as to allow the resin to flow out;
6) Stopping injection when the pressure reaches a certain value and transmitting the pressure to a control computer; the control computer opens the control water flow solenoid valve to charge the heated water into the inner core of the mold, and the hot water heats the resin together with the mold; excess resin in the die is extruded out from a resin outlet of the die, and when the pressure of the inner core reaches a certain value, a signal is transmitted to a control system by a pressure detector II of the inner core to stop filling hot water;
7) When the inner core of the die stops filling hot water, an outlet valve of the die is closed and resin is solidified; after curing is completed, the demolding control system controls the resin injection switch to work so as to repeat the above actions;
8) When the resin in the heating barrel is lowered to a preset value; the control system can complete the injection molding and close the resin outlet on the mold in the resin curing process; the control system controls the electromagnetic valve to be opened to release the pressure in the barrel, and resin is injected into the barrel, and at the moment, the temperature detector transmits a signal to the control system to start heating; when the resin volume reaches a preset value, the electromagnetic valve is closed to stop injecting resin, the electromagnetic valve from which the gas flows out is closed, the electromagnetic valve for controlling the inflow gas is opened to pressurize the barrel, and the operation can be continued after the completion.
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| CN201910076250.6A CN109719972B (en) | 2019-01-26 | 2019-01-26 | Resin injection device for preparing composite pipe fitting and control method |
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| CN201910076250.6A CN109719972B (en) | 2019-01-26 | 2019-01-26 | Resin injection device for preparing composite pipe fitting and control method |
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| CN109719972A CN109719972A (en) | 2019-05-07 |
| CN109719972B true CN109719972B (en) | 2023-08-18 |
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