阅读说明：本技术 电容环氧树脂的浇注设备及其浇注工艺 (Pouring equipment and pouring process for capacitor epoxy resin ) 是由 曹亚锋 于 2020-07-08 设计创作，主要内容包括：本发明公开了电容环氧树脂的浇注设备及其浇注工艺,其中电容环氧树脂的浇注工艺,包括配料、打料、电容芯子入壳、高温固化、二次打料、二次高温固化等工艺步骤；电容环氧树脂的浇注设备,包括打料箱,所述打料箱内部下端设置有运壳机构,所述打料箱上端设置有打料机构,所述打料箱一侧设置有真空干燥机构,所述真空干燥机构包括排真空管路、真空发生器、输氮气管路、氮气发生器、加热器、冷凝罐。本发明的电容环氧树脂的浇注工艺配合了电容环氧树脂的浇注设备,采用高温固化加抽水汽的加工工艺和抽真空再充氮破空的工艺,尽可能的排除了水汽和空气,防止环氧胶充入过程中有空隙产生,防止降低电容的绝缘性能。(The invention discloses a pouring device and a pouring process for capacitor epoxy resin, wherein the pouring process for the capacitor epoxy resin comprises the process steps of material proportioning, ramming, capacitor core shell filling, high-temperature curing, secondary ramming, secondary high-temperature curing and the like; pouring equipment of electric capacity epoxy, including beating the workbin, the inside lower extreme of beating the workbin is provided with fortune shell mechanism, it is provided with beating the material mechanism to beat the workbin upper end, it is provided with vacuum drying mechanism to beat workbin one side, vacuum drying mechanism is including arranging vacuum pipeline, vacuum generator, defeated nitrogen gas pipeline, nitrogen generator, heater, condensing jar. The pouring process of the capacitor epoxy resin provided by the invention is matched with pouring equipment of the capacitor epoxy resin, and a processing process of high-temperature curing and water pumping and a process of vacuumizing and nitrogen recharging to break the air are adopted, so that water vapor and air are removed as much as possible, the generation of gaps in the process of charging epoxy glue is prevented, and the reduction of the insulating property of the capacitor is prevented.)

1. The pouring process of the capacitor epoxy resin is characterized by comprising the following steps:

step one, batching;

step two, ramming;

step three, putting the capacitor core into a shell;

step four, high-temperature curing;

fifthly, secondary material beating;

and step six, secondary high-temperature curing.

2. The casting process of the capacitive epoxy resin according to claim 1, comprising the steps of:

step one, batching: preparing epoxy glue, wherein the epoxy glue comprises 100 parts of epoxy resin main agent 6115A and 30 parts of curing agent 6115B in parts by mass;

step two, ramming: the prepared epoxy glue is injected into a capacitor shell in a vacuum drying state, the injection flow is 2.5g/s, the time is 3s, the pressure is 0.4MPa, and the temperature is 50 ℃;

step three, the capacitor core is inserted into the shell: the capacitor core is arranged in the capacitor shell;

step four, high-temperature curing: comprises 1) high temperature curing, 2) water vapor pumping;

step five, secondary knockout: the prepared epoxy glue is injected into a capacitor shell in a vacuum drying state, the injection flow is 2.5g/s, the time is 2s, the pressure is 0.4MPa, and the temperature is 50 ℃;

step six, secondary high-temperature curing; comprises 1) high temperature solidification, 2) water vapor pumping and 3) vacuum cooling.

3. The casting process of the capacitive epoxy resin according to claim 2, wherein: the fourth step further comprises: 1) curing at high temperature, wherein the temperature is 95 +/-5 ℃, the time is 30min, 2) pumping water vapor, and pumping water vapor under negative pressure, wherein the pressure is 40KPa, and the time is 30 min; the sixth step further comprises: 1) curing at high temperature of 95 +/-5 ℃ for 30min, and 2) pumping water vapor under the negative pressure of 40KPa for 50 min.

4. The casting process of the capacitive epoxy resin according to claim 2, wherein: in the second step or the fifth step, the vacuum drying comprises primary vacuum pumping and secondary vacuum pumping, the vacuum degree of the secondary vacuum pumping is 2 times of the vacuum degree of the primary vacuum pumping, nitrogen is filled for air breaking after the primary vacuum pumping, the air breaking is carried out for 10min, the vacuum is carried out for 10min, and the circulation is carried out twice.

5. Pouring equipment of electric capacity epoxy, including beating workbin (1), its characterized in that: the device is characterized in that a shell conveying mechanism (2) is arranged at the lower end inside the material beating box (1), a material beating mechanism (3) is arranged at the upper end of the material beating box (1), a vacuum drying mechanism (4) is arranged on one side of the material beating box (1), the vacuum drying mechanism (4) comprises a vacuum discharge pipeline (5), a vacuum generator (6), a nitrogen conveying pipeline (7), a nitrogen generator (8), a heater (9) and a condensing tank (10), the vacuum discharge pipeline (5) is located on one side of the upper end of the material beating box (1), the vacuum generator (6) is located at one end, far away from the material beating box (1), of the material beating box (1), the nitrogen conveying pipeline (7) is located at the lower end of the vacuum discharge pipeline (5), the nitrogen generator (8) is located at one end, far away from the material beating box (1), and the heater (9) is located between the nitrogen generator (8) and the material beating box, the condensing tank (10) is positioned at the lower end of the heater (9).

6. The casting apparatus of capacitive epoxy according to claim 5, wherein: still be provided with solenoid valve (11) and check valve (12) on row vacuum pipeline (5), still be provided with solenoid valve (13) No. two on defeated nitrogen gas pipeline (7), heater (9) upper end still is provided with into gas port (14), still be provided with check valve (15) No. two on the pipeline between heater (9) and condensing tank (10).

7. The casting apparatus of capacitive epoxy according to claim 5, wherein: fortune shell mechanism (2) are including going into shell conveying chain (16), going out shell conveying chain (17), cylinder (18), slide rail (19), income shell door (20), it is located the inside lower extreme of case of beating (1) to go into shell conveying chain (16), it is located into shell conveying chain (16) one side to go out shell conveying chain (17), and sets up perpendicularly with income shell conveying chain (16), cylinder (18) are located into shell conveying chain (16) opposite side, and set up perpendicularly with income shell conveying chain (16), slide rail (19) are located into shell conveying chain (16) lower extreme, it is located the one side that case of beating (1) lower part and income shell conveying chain (16) correspond to go into shell door (20).

8. The casting apparatus of capacitive epoxy according to claim 7, wherein: the shell entering conveying chain (16) is also provided with a shell entering groove (21), and the shell discharging conveying chain (17) is provided with a shell discharging groove (22).

9. The casting apparatus of capacitive epoxy according to claim 5, wherein: the material beating mechanism (3) comprises a material beating gun (23), a second cylinder (24), a main agent pipeline (25), a curing agent pipeline (26), a heating box (27), a main agent barrel (28) and a curing agent barrel (29), the material beating gun (23) is positioned at the upper side inside the material beating box (1), the second air cylinder (24) is positioned between the material beating gun (23) and the inside of the top end of the material beating box (1), the main agent pipeline (25) and the curing agent pipeline (26) are positioned at the upper end of the material beating box (1), and passes through the material-beating box (1) to be connected with the material-beating gun (23), the main agent barrel (28) is positioned at one end of the main agent pipeline (25) far away from the material-beating gun (23), the curing agent barrel (29) is positioned at one end of the curing agent pipeline (26) far away from the material feeding gun (23), the heating box (27) is positioned in the middle of the main agent pipeline (25) and the curing agent pipeline (26).

10. The casting apparatus of capacitive epoxy according to claim 9, wherein: the utility model discloses a curing agent, including make material rifle (23), it is provided with support slider (30) to make the material rifle (23) upside, support slider (30) one end is provided with slide rail (31), be provided with No. three solenoid valve (32) on main agent pipeline (25), be provided with No. four solenoid valve (33) on curing agent pipeline (26), be provided with temperature sensitive meter (34) in heating cabinet (27).

Technical Field

The invention relates to the field of capacitors, in particular to pouring equipment and a pouring process for capacitor epoxy resin.

Background

The pouring process of the capacitor epoxy resin comprises the steps of pouring the epoxy resin into a capacitor shell, inserting a capacitor core into the capacitor shell, curing at high temperature and the like, wherein in the pouring process of the capacitor epoxy resin, two times of pouring and two times of high temperature curing are needed, and the processing equipment and the processing process have some defects.

Firstly, the method comprises the following steps: in the traditional epoxy resin pouring process, the capacitor is poured by exposing in the air, water vapor in the capacitor epoxy glue after pouring can not be completely removed, more gaps are generated in the epoxy glue, the insulating property of the capacitor is reduced, and the quality of the capacitor is lower;

II, secondly: traditional epoxy's pouring equipment causes epoxy to glue easily and leaks among its pouring process, takes place the adhesion, needs the maintenance equipment of higher frequency, causes production efficiency to be lower.

Disclosure of Invention

The invention aims to provide pouring equipment and a pouring process for capacitor epoxy resin, which aim to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

the pouring process of the capacitor epoxy resin comprises the following steps:

step one, batching;

step two, ramming;

step three, putting the capacitor core into a shell;

step four, high-temperature curing;

fifthly, secondary material beating;

and step six, secondary high-temperature curing.

Preferably, the method comprises the following steps:

step one, batching: preparing epoxy glue, wherein the epoxy glue comprises 100 parts of epoxy resin main agent 6115A and 30 parts of curing agent 6115B in parts by mass, and the epoxy resin main agent and the curing agent are conventional epoxy glue;

step two, ramming: the prepared epoxy glue is injected into a capacitor shell in a vacuum drying state, the injection flow is 2.5g/s, the time is 3s, the pressure is 0.4MPa, the temperature is 50 ℃, the injection speed and the injection amount in the step are accurate, and the injection uniformity can be realized;

step three, the capacitor core is inserted into the shell: the capacitor core is arranged in the capacitor shell;

step four, high-temperature curing: the method comprises the following steps of 1, high-temperature curing, 2, water vapor pumping, wherein the process of high-temperature curing and water vapor pumping can reduce air and water vapor in the epoxy glue and reduce the generation of gaps;

step five, secondary knockout: the prepared epoxy glue is injected into a capacitor shell in a vacuum drying state, the injection flow is 2.5g/s, the time is 2s, the pressure is 0.4MPa, the temperature is 50 ℃, the secondary injection and the primary injection are both accurate and controllable, the product quality can be improved, the secondary injection is half more than the primary injection, and the curing degree of the epoxy glue is uniform for the two-time high-temperature curing;

step six, secondary high-temperature curing; the method comprises the steps of 1 high-temperature curing, 2 water vapor pumping and 3 vacuum cooling, wherein after the high-temperature curing, the epoxy adhesive has certain softness, if the epoxy adhesive is placed in the air, dust possibly enters the epoxy adhesive to influence the quality of a product, and the epoxy adhesive after the vacuum cooling can prevent the dust from entering the epoxy adhesive.

Preferably, the fourth step further comprises: 1, curing at a high temperature of 95 +/-5 ℃ for 30min, 2, pumping water vapor under a negative pressure of 40KPa for 30 min; the sixth step further comprises: 1, curing at the high temperature of 95 +/-5 ℃ for 30min, 2, pumping water vapor under the negative pressure of 40KPa for 50min, and discharging air and water vapor in the epoxy glue in the curing process by adopting a processing technology of high-temperature curing and pumping water vapor to improve the quality of the capacitor.

Preferably, in the second or fifth step, the vacuum drying comprises a first vacuum pumping and a second vacuum pumping, the vacuum degree of the second vacuum pumping is 2 times of the vacuum degree of the first vacuum pumping, nitrogen is filled and air is broken after the first vacuum pumping, the air is broken for 10min, the vacuum is 10min, the process is circulated twice, and the processes of vacuumizing, nitrogen filling and air breaking are performed, so that water vapor and air are removed as much as possible, the generation of air gaps in the process of filling epoxy glue is prevented, the insulating property of the capacitor is reduced, the epoxy glue can be fully distributed and enter the capacitor shell, the yield of the capacitor is increased, and the product quality is improved.

The pouring equipment for the epoxy resin of the capacitor comprises a material beating box, wherein the material beating box is a closed box body, a shell conveying mechanism is arranged at the lower end inside the material beating box and used for accurately conveying a capacitor shell to the lower end of a glue gun, a material beating mechanism is arranged at the upper end of the material beating box and used for beating main epoxy glue and a curing agent into the capacitor shell according to a certain proportion, temperature and pressure, a vacuum drying mechanism is arranged on one side of the material beating box and used for repeatedly vacuumizing and breaking vacuum in the material beating box and discharging air and water vapor in the material beating box to reduce the occurrence of gaps in the epoxy glue, the vacuum drying mechanism comprises a vacuum discharge pipeline, a vacuum generator, a nitrogen gas conveying pipeline, a nitrogen gas generator, a heater and a condensing tank, the vacuum discharge pipeline is positioned on one side of the upper end of the material beating box and communicated with the material beating box, vacuum generator is located the one end of beating the workbin and keeping away from the case of beating, and vacuum generator is at the incasement evacuation of beating through the evacuation pipeline, defeated nitrogen gas pipeline is located row vacuum pipeline lower extreme, defeated nitrogen gas pipeline and knockout box upper end intercommunication, nitrogen generator is located the one end of the case of beating of row vacuum pipeline keep away from, nitrogen generator is used for producing pure nitrogen gas, the heater is located nitrogen generator and beats between the workbin, and the heater is used for the heated air, again by air heating nitrogen gas, makes the temperature of nitrogen gas can not rise sharply, increases the stability of injecting glue environment, the condensate tank is located the heater lower extreme, the condensate tank is used for collecting steam.

Preferably, still be provided with an solenoid valve and a check valve on the evacuation pipeline, a solenoid valve is used for controlling time, the intensity of evacuation, a check valve prevents that steam from palirrhea, still be provided with the solenoid valve No. two on the nitrogen transmission pipeline, No. two solenoid valves are used for controlling nitrogen gas side time, flow of filling, the heater upper end still is provided with into the gas port, it is used for inflating the air to go into the gas port, still be provided with No. two check valves on the pipeline between heater and the condensate tank, No. two check valves prevent that steam from palirrhea.

Preferably, fortune shell mechanism is including going into shell conveying chain, going out shell conveying chain, a cylinder, slide rail, income shell door, it is located the inside lower extreme of case of beating to go into shell conveying chain, it is used for transporting the electric capacity shell to go into shell conveying chain, it is located into shell conveying chain one side to go out shell conveying chain, and sets up perpendicularly with income shell conveying chain, a cylinder is located into shell conveying chain opposite side, and sets up perpendicularly with income shell conveying chain, and when epoxy was squeezed into the electric capacity shell, a cylinder promoted the electric capacity shell, makes the electric capacity shell pushed out shell conveying chain, carries out the high temperature curing of next step, the slide rail is located into shell conveying chain lower extreme, and the slide rail can drive the case of beating outside with going into shell conveying chain, holds new electric capacity shell, it is located the case of beating lower part and goes into one side that shell conveying chain corresponds to go into the shell door.

Preferably, the case entering conveying chain is further provided with a case entering groove, the case discharging conveying chain is provided with a case discharging groove, the case entering groove and the case discharging groove can stably place the capacitor case on the case entering conveying chain and the case discharging conveying chain, and leakage of epoxy glue is prevented.

The ramming mechanism comprises a ramming gun, a second cylinder, a main agent pipeline, a curing agent pipeline, a heating box, a main agent barrel and a curing agent barrel, wherein the ramming gun is positioned at the upper side inside the ramming box and is positioned right above a shell conveying chain for ramming glue in a capacitor shell, the second cylinder is positioned between the ramming gun and the top end of the ramming box, the second cylinder can drive the ramming gun to move up and down, the main agent pipeline and the curing agent pipeline are positioned at the upper end of the ramming box, the main agent pipeline is thicker than the curing agent pipeline and is matched with the main agent and the curing agent in proportion, the ramming box is penetrated and connected with the ramming gun, the main agent barrel is positioned at one end of the main agent pipeline far away from the ramming gun, the curing agent barrel is positioned at one end of the curing agent pipeline far away from the ramming gun, the heating box is positioned at the middle parts of the main agent pipeline and the curing agent pipeline, and is used for heating the epoxy adhesive main agent, to conform to temperature parameters in the process.

Preferably, the material beating rifle upside is provided with the supporting slide block, supporting slide block one end is provided with the slide rail, supporting slide block and slide rail are used for assisting the up-and-down motion of material beating rifle, be provided with the solenoid valve No. three on the main agent pipeline, be provided with the solenoid valve No. four on the curing agent pipeline, solenoid valve No. three and solenoid valve No. four are used for controlling the flow that the epoxy was glued, be provided with the sensitive meter of temperature in the heating cabinet, the sensitive meter of temperature is used for monitoring the temperature that the epoxy glued, makes it accord with temperature parameter.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention discloses a pouring process of capacitor epoxy resin, which adopts a processing process of high-temperature curing and water vapor pumping and combines a process of vacuumizing, nitrogen refilling and air breaking, thereby removing water vapor and air as much as possible, preventing air gaps from being generated in the process of filling epoxy glue, reducing the insulating property of a capacitor, enabling the epoxy glue to be fully distributed and enter a capacitor shell, increasing the yield of the capacitor and increasing the product quality;

2. the pouring equipment for the capacitor epoxy resin disclosed by the invention assists the pouring process for the capacitor epoxy resin, so that the conditions in the processes of vacuumizing and nitrogen filling are controllable, the gaps in the epoxy glue are reduced, and the quality is improved;

3. according to the pouring equipment for the epoxy resin of the capacitor, the case entering conveying chain and the case exiting conveying chain for conveying the capacitor case are provided with the grooves, the case can be accurately positioned and fixed by combining the stable pushing of the air cylinder and the matching between the conveying chain and the glue gun, the epoxy glue can be prevented from being adhered to the conveying chain, the maintenance frequency of the equipment is reduced, and the processing efficiency is increased;

4. in the pouring equipment for the capacitor epoxy resin, the flow and the speed of the main agent and the fixing agent in the knockout mechanism can be controlled by the pipe thickness and the electromagnetic valve, the temperature of epoxy glue can be monitored, and the process can be accurately matched;

5. in the pouring equipment for the epoxy resin of the capacitor, disclosed by the invention, when the vacuum drying mechanism is filled with nitrogen, hot air is used for heating the nitrogen, the nitrogen with higher temperature is filled in the knockout box, and water vapor is taken away by using a vacuumizing mode, so that a gap generated in epoxy glue is avoided.

Drawings

FIG. 1 is a schematic diagram of the process steps for casting the capacitor epoxy resin of the present invention;

FIG. 2 is a schematic structural diagram of a pouring apparatus for capacitor epoxy resin according to the present invention;

FIG. 3 is a schematic structural view of a vacuum drying mechanism according to the present invention;

FIG. 4 is a schematic structural diagram of the transporting shell mechanism of the present invention;

FIG. 5 is a top view of the transportation housing mechanism of the present invention;

fig. 6 is a schematic structural diagram of the knockout mechanism of the invention.

Reference numerals: 1. a material beating box; 2. a shell conveying mechanism; 3. a knockout mechanism; 4. a vacuum drying mechanism; 5. discharging a vacuum pipeline; 6. a vacuum generator; 7. a nitrogen gas pipeline; 8. a nitrogen generator; 9. a heater; 10. a condensing tank; 11. a first electromagnetic valve; 12. a first check valve; 13. a second electromagnetic valve; 14. an air inlet; 15. a second one-way valve; 16. a shell-entering conveying chain; 17. a delivery chain for discharging the shells; 18. a first cylinder; 19. a slide rail; 20. entering a shell door; 21. entering a shell groove; 22. discharging the shell from the shell groove; 23. a material feeding gun; 24. a second cylinder; 25. a main agent pipeline; 26. a curing agent pipeline; 27. a heating box; 28. a main agent barrel; 29. a curing agent barrel; 30. a support slide block; 31. a slide rail; 32. a third electromagnetic valve; 33. a fourth electromagnetic valve; 24. a temperature sensitive meter.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.