CN111716609B - Pouring equipment and pouring process for capacitor epoxy resin - Google Patents
Pouring equipment and pouring process for capacitor epoxy resin Download PDFInfo
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- CN111716609B CN111716609B CN202010652317.9A CN202010652317A CN111716609B CN 111716609 B CN111716609 B CN 111716609B CN 202010652317 A CN202010652317 A CN 202010652317A CN 111716609 B CN111716609 B CN 111716609B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/003—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor characterised by the choice of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C39/04—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles using movable moulds not applied
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/24—Feeding the material into the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/38—Heating or cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/44—Measuring, controlling or regulating
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- Application Of Or Painting With Fluid Materials (AREA)
Abstract
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.
Description
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 and the curing 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.
Example 1: referring to fig. 1, a process for casting epoxy resin for capacitors includes 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, 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 vacuum drying comprises first vacuumizing and second vacuumizing, the vacuum degree of the second vacuumizing is 2 times of that of the first vacuumizing, nitrogen is filled and air is broken after the first vacuumizing, the air is broken for 10min, the vacuum is broken for 10min, and the circulation is carried out twice;
step three, the capacitor core is inserted into the shell: the capacitor core is arranged in the capacitor shell;
step four, 1) high-temperature curing is carried out, the temperature is 95 ℃, the time is 30min, 2) water vapor is pumped, the water vapor is pumped under negative pressure, the pressure is 40KPa, and the time is 30 min;
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 vacuum drying comprises first vacuumizing and second vacuumizing, the vacuum degree of the second vacuumizing is 2 times of that of the first vacuumizing, nitrogen is filled and air is broken after the first vacuumizing, the air is broken for 10min, the vacuum is broken for 10min, and the circulation is carried out twice;
step six, secondary high-temperature curing: comprises 1) high temperature curing at 95 deg.C for 30min, 2) water vapor pumping under negative pressure at 40KPa for 50min, and 3) vacuum cooling.
Example 2: referring to fig. 2 to 3, in the present invention, the pouring apparatus for capacitor epoxy resin includes a material beating box 1, the material beating box 1 is a closed box body, a shell conveying mechanism 2 is disposed at a lower end inside the material beating box 1, the shell conveying mechanism 2 is used for accurately conveying a capacitor shell to a lower end of a glue gun, a material beating mechanism 3 is disposed at an upper end of the material beating box 1, the material beating mechanism 3 is used for beating a main epoxy glue agent and a curing agent into the capacitor shell according to a certain proportion, temperature and pressure, a vacuum drying mechanism 4 is disposed at one side of the material beating box 1, the vacuum drying mechanism 4 is used for repeatedly vacuumizing and breaking vacuum inside the material beating box 1, so as to discharge air and water vapor inside the material beating box 1 and reduce occurrence of voids inside the epoxy glue, and the vacuum drying mechanism 4 includes 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, wherein the vacuum discharge pipeline 5 is positioned at one side of the upper end of the knockout box 1, the vacuum discharge pipeline 5 is communicated with the knockout box 1, the vacuum generator 6 is positioned at one end of the knockout box 1 far away from the knockout box 1, the vacuum generator 6 is vacuumized in the knockout box 1 through a vacuum discharge pipeline 5, the nitrogen conveying pipeline 7 is positioned at the lower end of the vacuum discharge pipeline 5, the nitrogen conveying pipeline 7 is communicated with the upper end of the knockout box 1, the nitrogen generator 8 is positioned at one end of the vacuum exhaust pipeline 5 far away from the material beating box 1, the nitrogen generator 8 is used for generating pure nitrogen, the heater 9 is positioned between the nitrogen generator 8 and the knockout box 1, the heater 9 is used for heating air, and then the air heats the nitrogen, so that the temperature of the nitrogen does not rise rapidly, the stability of the glue injection environment is improved, the condensing tank 10 is positioned at the lower end of the heater 9, and the condensing tank 10 is used for collecting water vapor.
Referring to fig. 3, the vacuum exhaust pipeline 5 is further provided with a first electromagnetic valve 11 and a first check valve 12, the first electromagnetic valve 11 is used for controlling the time and strength of vacuum pumping, the first check valve 12 prevents backflow of water vapor, the nitrogen gas transmission pipeline 7 is further provided with a second electromagnetic valve 13, the second electromagnetic valve 13 is used for controlling the nitrogen gas side charging time and flow rate, the upper end of the heater 9 is further provided with an air inlet 14, the air inlet 14 is used for charging air, the pipeline between the heater 9 and the condensing tank 10 is further provided with a second check valve 15, and the second check valve 15 prevents backflow of water vapor.
Referring to fig. 4 to 5, the shell conveying mechanism 2 includes a shell entering conveying chain 16, a shell exiting conveying chain 17, a first cylinder 18, a sliding rail 19, and a shell entering door 20, the shell feeding conveying chain 16 is positioned at the lower end in the material beating box 1, the shell feeding conveying chain 16 is used for conveying the capacitor shell, the shell discharging conveying chain 17 is positioned at one side of the shell feeding conveying chain 16, and is arranged vertically with the shell entering conveying chain 16, the first air cylinder 18 is positioned at the other side of the shell entering conveying chain 16 and is arranged vertically with the shell entering conveying chain 16, when the epoxy glue is injected into the capacitor shell, the first cylinder 18 pushes the capacitor shell to push the capacitor shell to the shell-discharging conveying chain 17 for high-temperature curing in the next step, the slide rail 19 is positioned at the lower end of the in-shell conveying chain 16, the in-shell conveying chain 16 can be driven by the slide rail 19 to the outside of the knockout box 1 to contain a new capacitor shell, and the in-shell door 20 is positioned at the lower part of the knockout box 1 and at one side corresponding to the in-shell conveying chain 16.
Referring to fig. 4 to 5, a case entering groove 21 is further formed in the case entering conveying chain 16, a case discharging groove 22 is formed in the case discharging conveying chain 17, and the case entering groove 21 and the case discharging groove 22 can stably place the capacitor case on the case entering conveying chain 16 and the case discharging conveying chain 17 and prevent leakage of epoxy glue.
Referring to fig. 6, the ramming mechanism 3 includes a ramming 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 ramming gun 23 is located on the upper side inside the ramming box 1, the ramming gun 23 is located right above the case entering conveying chain 16 and is used for ramming glue in the capacitor case, the second cylinder 24 is located between the ramming gun 23 and the top end inside the ramming box 1, the second cylinder 24 can drive the ramming gun 23 to move up and down, the main agent pipeline 25 and the curing agent pipeline 26 are located on the upper end of the ramming box 1, the main agent pipeline 25 is thicker than the curing agent pipeline 26 and is adapted to the ratio of the main agent and the curing agent and passes through the ramming box 1 and the ramming gun 23 to be connected, the main agent barrel 28 is located at one end of the main agent pipeline 25 far from the ramming gun 23, the curing agent barrel 29 is located at one end of the curing agent pipeline 26 far from the ramming gun 23, the heating box 27 is located in the middle of the main agent pipeline 25 and the curing agent pipeline 26, and the heating box 27 is used for heating the epoxy adhesive main agent and the curing agent to enable the epoxy adhesive main agent and the curing agent to meet temperature parameters in the process.
Referring to fig. 6, a supporting slider 30 is disposed on the upper side of the material feeding gun 23, a sliding rail 31 is disposed at one end of the supporting slider 30, the supporting slider 30 and the sliding rail 31 are used for assisting the material feeding gun 23 to move up and down, a third electromagnetic valve 32 is disposed on the main agent pipeline 25, a fourth electromagnetic valve 33 is disposed on the curing agent pipeline 26, the third electromagnetic valve 32 and the fourth electromagnetic valve 33 are used for controlling the flow rate of epoxy glue, a temperature sensitive meter 34 is disposed in the heating box 27, and the temperature sensitive meter 34 is used for monitoring the temperature of the epoxy glue to enable the epoxy glue to conform to temperature parameters.
Experiment: using the process steps of example 1 and the equipment of example 2 for epoxy resin casting, and using conventional equipment as a comparative example, after 8 hours of processing, counting the number of products, randomly selecting one batch from the products obtained in example 1 and the comparative example, observing the number of products having voids in the epoxy resin for the capacitance profile, and obtaining table 1:
TABLE 1
| Product number (only) | Void products (only) | |
| Example 1 | 1580 | 3 |
| Comparative example | 1082 | 42 |
As can be seen from table 1, the number of products processed in 8h in example 1 is half more than that in the comparative example, which indicates that the processing efficiency is greatly improved, and only 3 voids are generated in example 1 and 42 voids are generated in the comparative example, which indicates that the invention can prevent voids from being generated in the epoxy resin filling process, increase the yield of capacitors, increase the product quality, and have practicability.
The working principle of the invention is as follows: when glue is injected into the capacitor shell, firstly, the vacuum drying mechanism 4 vacuumizes the interior of the material injection box 1, then the capacitor shell is placed on the shell conveying mechanism 2, the shell conveying mechanism 2 operates to convey the capacitor shell to be opposite to the material injection mechanism 3, the material injection mechanism 3 injects epoxy resin glue, finally, the shell conveying mechanism 2 conveys the capacitor shell subjected to glue injection into the next high-temperature curing program, and then the vacuum drying mechanism 4 repeatedly vacuumizes and breaks the interior of the material injection box 1 to be empty in the process, so that no gap or water vapor is left between the epoxy resin and the capacitor shell in the material injection process;
the operating principle of the shell conveying mechanism 2 is as follows: opening a shell feeding door 20, driving a shell feeding conveying chain 16 to the outside of a material beating box 1 by a sliding rail 19, placing a capacitor shell in a shell feeding groove 21, then feeding the shell feeding conveying chain 16 into the material beating box 1, closing the shell feeding door 20, driving the shell feeding conveying chain 16 to bring the capacitor shell to the lower end of a material beating gun 23, starting beating, pushing the beated capacitor shell onto a shell discharging conveying chain 17 by a first air cylinder 18 after the beating is finished, and entering the next high-temperature curing process step;
the operating principle of the knockout mechanism 3 is as follows: the computer controls the third electromagnetic valve 32 and the fourth electromagnetic valve 33 to be opened, the epoxy resin main agent and the curing agent in the main agent barrel 28 and the curing agent barrel 29 are heated to a certain temperature through the heating box 27 and then are driven into the material-beating gun 23 according to a certain proportion, the second air cylinder 24 drives the material-beating gun 23 to move downwards during material beating, and the second air cylinder 24 drives the material-beating gun 23 to return to the original position after the material beating is completed, so that epoxy glue is prevented from dripping;
the working principle of the vacuum drying mechanism 4 is as follows: the first electromagnetic valve 11 is opened, the vacuum generator vacuumizes the interior of the material beating box 1 through the vacuum discharge pipeline 5, the first one-way valve 12 prevents water vapor from flowing backwards, the second electromagnetic valve 13 is opened, the nitrogen generator generates nitrogen, the heater 9 is filled with air through the air inlet 14 in the period, the heated air heats the nitrogen again, then the nitrogen is introduced into the material beating box 11 through the nitrogen conveying pipeline 7, and the interior of the material beating box 1 is broken.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. 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 (1), the heater (9) is used for heating air, the air is used for heating nitrogen, and the condensing tank (10) is located at the lower end of the heater (9).
2. The casting apparatus of capacitive epoxy according to claim 1, 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).
3. The casting apparatus of capacitive epoxy according to claim 1, 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).
4. The casting apparatus of capacitive epoxy according to claim 3, 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).
5. The casting apparatus of capacitive epoxy according to claim 1, 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).
6. The casting apparatus of capacitive epoxy according to claim 5, 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).
7. The pouring process of the capacitor epoxy resin is characterized by being completed by the pouring equipment of the capacitor epoxy resin as claimed in any one of claims 1 to 6, and the pouring process comprises the following steps:
step one, batching;
step two, ramming;
step three, putting the capacitor core into a shell;
step four, high-temperature curing: comprises 1) high temperature curing, 2) water vapor pumping;
fifthly, secondary material beating;
step six, secondary high-temperature curing: comprises 1) high temperature solidification, 2) water vapor pumping and 3) vacuum cooling.
8. The casting process of the capacitive epoxy according to claim 7, 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.
9. The casting process of the capacitive epoxy resin according to claim 8, 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.
10. The casting process of the capacitive epoxy resin according to claim 8, 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.
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| CN112731983B (en) * | 2020-12-09 | 2022-04-29 | 全立传感科技(南京)有限公司 | Method for curing base glue of foil type resistance strain gauge |
| CN113394116A (en) * | 2021-06-18 | 2021-09-14 | 深圳技术大学 | Method for improving semiconductor metal packaging product excess detection qualification rate |
| CN113410056B (en) * | 2021-07-08 | 2022-09-09 | 无锡市电力滤波有限公司 | Vacuum pouring process of direct-current support capacitor |
| CN115008659A (en) * | 2022-06-10 | 2022-09-06 | 大连北方互感器集团有限公司 | Epoxy resin vacuum casting gate repair-free process |
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