CN107705988B - Preparation method of thin film capacitor - Google Patents
Preparation method of thin film capacitor Download PDFInfo
- Publication number
- CN107705988B CN107705988B CN201710865773.XA CN201710865773A CN107705988B CN 107705988 B CN107705988 B CN 107705988B CN 201710865773 A CN201710865773 A CN 201710865773A CN 107705988 B CN107705988 B CN 107705988B
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- Prior art keywords
- core
- spraying
- gold
- capacitor
- preparation
- Prior art date
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- 239000003990 capacitor Substances 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000010409 thin film Substances 0.000 title claims description 5
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000005507 spraying Methods 0.000 claims abstract description 18
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000010931 gold Substances 0.000 claims abstract description 15
- 229910052737 gold Inorganic materials 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims abstract description 11
- 238000007493 shaping process Methods 0.000 claims abstract description 11
- 238000007731 hot pressing Methods 0.000 claims abstract description 10
- 238000003825 pressing Methods 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 9
- 239000004743 Polypropylene Substances 0.000 claims abstract description 8
- 239000003973 paint Substances 0.000 claims abstract description 8
- -1 polypropylene Polymers 0.000 claims abstract description 8
- 229920001155 polypropylene Polymers 0.000 claims abstract description 8
- 238000004804 winding Methods 0.000 claims abstract description 8
- 239000011248 coating agent Substances 0.000 claims abstract description 6
- 238000000576 coating method Methods 0.000 claims abstract description 6
- 239000010408 film Substances 0.000 claims description 27
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000011068 loading method Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000005022 packaging material Substances 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000012805 post-processing Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/33—Thin- or thick-film capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/224—Housing; Encapsulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/228—Terminals
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The invention relates to a preparation method of a film capacitor, which comprises the following working procedures of winding, cold pressing, hot drying, metal spraying and the following working procedures, and the preparation method and the steps thereof are as follows in sequence: (1) winding: the metallized polypropylene film is overlapped and then wound to form a core; (2) cold pressing: flattening the core; (3) pretreatment: placing the cold-pressed core in a sealed space, adjusting the temperature to 40 +/-5 ℃, adjusting the humidity RH to be below 35%, and placing for 2-10 hours; (3) hot pressing: preliminarily shaping the pretreated core; and (4) spraying gold: spraying gold paint on the end surface of the core after hot pressing, so that the gold paint is in contact with the metal coating on the metallized polypropylene film and is led out; (5) hot baking: putting the core subjected to metal spraying into a drying oven for shaping; (6) a subsequent step; the invention effectively eliminates various stresses generated on the film, is not easy to deform, can ensure that the end surface of the core is effectively led out, the gold-sprayed layer is not easy to deform, and the hum of the capacitor is obviously reduced.
Description
Technical Field
The embodiment of the invention relates to a preparation method of a capacitor, in particular to a preparation method of a film capacitor.
Background
In the prior art, the production process of the film capacitor has the following defects:
1. the film is not subjected to a pretreatment process, and after the film is wound, the film is directly subjected to heat treatment without a process of eliminating tensile stress, so that the film is greatly influenced by tensile force and is difficult to effectively recover from micro damage among the films.
2. The existing motor capacitor process sequence basically adopts the sequence of firstly heat treating and then spraying gold, and has the defects that gaps still exist among films, and hum is larger after the films are installed on a motor.
3. At present, the product, back process, especially embedment and curing process, can all carry out the heat treatment of certain temperature, for example 60 ℃,85 ℃, carry out the stoving processing under the temperature conditions such as 115 ℃, in order to ensure the solidification performance, but carry out the heat treatment process like this, can lead to the fact secondary to stereotyped good condenser core in early stage, this secondary is stereotyped in fact, can make the core that originally has no air gap produce certain clearance on the contrary, simultaneously, because there is the solidification condition of certain temperature, the epoxy cured object can be under higher temperature, the mobility reinforcing, and then get into in the core clearance, form certain destruction to the core, cause the harmful effects that hum increases.
Disclosure of Invention
The invention provides a preparation method of a film capacitor, which can effectively eliminate various stresses generated on the film, is not easy to deform, can ensure that the end surface of a core is effectively led out, a gold-sprayed layer is not easy to deform, and hum of the capacitor is obviously reduced.
In order to solve the technical problems, the invention adopts a technical scheme that: the preparation method of the film capacitor comprises the following working procedures of winding, cold pressing, hot drying, metal spraying and post-working, and is characterized in that the preparation method and the steps thereof are as follows in sequence:
(1) Winding: the metallized polypropylene film is overlapped and then wound to form a core;
(2) Cold pressing: flattening the core;
(3) Pretreatment: placing the cold-pressed core in a sealed space, adjusting the temperature to 40 +/-5 ℃, and the humidity RH below 35%, wherein the placing time is 2-10 hours;
(3) Hot pressing: preliminarily shaping the pretreated core;
(4) Spraying gold: spraying gold paint on the end surface of the core after hot pressing, so that the gold paint is in contact with the metal coating on the metallized polypropylene film and is led out;
(5) And (3) baking: putting the core subjected to metal spraying into a drying oven for shaping;
(6) And (5) performing a post-process.
Preferably, fixing plates extend from two sides of the fixing clamp cavity respectively, fixing holes are formed in the fixing plates, the other end of each bolt penetrates through the fixing holes and is limited and fixed through a nut, movable plates corresponding to the fixing plates extend from two sides of the movable clamp cavity respectively, movable holes are formed in the movable plates, the movable plates penetrate through the bolts movably through the movable holes, and one end of each elastic body is pressed against the movable plates; the bolt plays a guiding role, so that the movable clamp keeps balance in the sliding process, the movable plate can flexibly, freely and smoothly slide on the bolt, and the nut and the thread section on the bolt are locked and positioned to play a limiting role on the fixed plate.
Preferably, the steps after step (6) comprise the following steps in sequence:
(6.1) energization: eliminating weak current of the core;
(6.2) half-detection: detecting a core;
(6.3) welding: leading out the core electrode;
(6.4) assembling: loading the core into the housing;
(6.5) encapsulating: pouring the encapsulating material into the shell to fix the core;
(6.6) curing: curing the packaging material at normal temperature;
(6.7) trimming and correcting pins: correcting the electrode extraction;
(6.8) marking/printing;
(6.9) appearance inspection;
and (6.10) packaging and warehousing.
Preferably, steps (4), (5) and (6) are carried out under normal temperature and normal humidity conditions. In particular, steps 6.5 and 6.6 must be carried out at normal temperature without any heat treatment; thereby solving the defects of the (3) th point of the background art.
The step (5) of baking is carried out under the following conditions: the temperature is 120 +/-5 ℃ and the time is 8-16 hours.
The prepared capacitor is arranged on a capacitor machine and has the following parameters and performances: the hum of the capacitor of the motor is less than or equal to 5 decibels.
The embodiment of the invention has the beneficial effects that:
1) According to the preparation method of the film capacitor, the conventional process is to perform preliminary cold pressing after the rolling is finished, and then directly enter the hot pressing for preliminary shaping, and the pretreatment process is added in the preparation method, so that various stresses to the film during the rolling and cold pressing treatment of the core can be effectively eliminated.
2) The invention relates to a preparation method of a film capacitor, which adjusts the process sequence after hot pressing primary shaping, adjusts the gold spraying process to the front of the hot drying process, and has the advantages that: after the core is preliminarily shaped but not completely shaped, coating the gold-sprayed layer to ensure the effective leading-out of the end face of the core, and meanwhile, as the gold-sprayed layer is in a non-deformable solid state after coating, carrying out hot drying and shaping on the core to ensure that the film layer can be more completely attached; and eliminate the air gap between films, reduce the source of hum.
3) According to the preparation method of the film capacitor, all working procedures after the core is subjected to heat setting are carried out under the conditions of normal temperature and normal humidity, and the manufacturing process in the prior art generally carries out high-temperature treatment on products so as to shorten the process circulation time.
Detailed Description
In order that the invention may be more readily understood, reference will now be made in detail to the following examples.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The preparation method of the film capacitor comprises the following working procedures of winding, cold pressing, hot drying, metal spraying and post-working, and is characterized in that the preparation method and the steps thereof are as follows in sequence:
(1) Winding: the metallized polypropylene film is overlapped and then wound to form a core;
(2) Cold pressing: flattening the core;
(3) Pretreatment: placing the cold-pressed core in a sealed space, adjusting the temperature to 40 +/-5 ℃, and the humidity RH below 35%, wherein the placing time is 2-10 hours;
(3) Hot pressing: preliminarily shaping the pretreated core;
(4) Spraying gold: spraying gold paint on the end surface of the core after hot pressing, so that the gold paint is in contact with the metal coating on the metallized polypropylene film and is led out;
(5) And (3) baking: placing the core subjected to metal spraying into a drying oven for shaping;
(6) And (5) post-processing.
Preferably, two sides of the fixed clamping cavity are respectively extended with a fixed plate, the fixed plate is provided with a fixed hole, the other end of the bolt penetrates through the fixed hole and is limited and fixed through a nut, two sides of the movable clamping cavity are respectively extended with a movable plate corresponding to the fixed plate, the movable plate is provided with a movable hole, the movable plate is movably arranged on the bolt in a penetrating way through the movable hole, and one end of the elastic body is pressed against the movable plate; the bolt plays a guiding role, so that the movable clamp keeps balance in the sliding process, the movable plate can flexibly, freely and smoothly slide on the bolt, and the nut and the thread section on the bolt are locked and positioned to play a limiting role on the fixed plate.
Preferably, the steps after step (6) comprise the following steps in sequence:
(6.1) energizing: the weak current of the core is eliminated;
(6.2) half-detection: detecting a core;
(6.3) welding: leading out the core electrode;
(6.4) assembling: loading the core into the housing;
(6.5) potting: pouring the encapsulating material into the shell to fix the core;
(6.6) curing: curing the packaging material at normal temperature;
(6.7) trimming and correcting pins: correcting the electrode extraction;
(6.8) marking/lettering;
(6.9) appearance inspection;
and (6.10) packaging and warehousing.
Preferably, steps (4), (5) and (6) are carried out under normal temperature and normal humidity conditions; in particular, steps 6.5 and 6.6 must be carried out at normal temperature without any heat treatment; thereby solving the defect of the (3) th point of the background art.
The step (5) of baking is carried out under the following conditions: the temperature is 120 +/-5 ℃ and the time is 8-16 hours.
The prepared capacitor is installed on a capacitor machine and has the following parameters and performances: the hum of the capacitor of the motor is less than or equal to 5 decibels.
It should be understood, however, that the description herein of the preferred embodiment of the present invention is not intended to limit the invention to the particular embodiment disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims. Moreover, the above technical features are combined with each other to form various embodiments which are not listed above, and all the embodiments are regarded as the scope of the present invention described in the specification; further, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. A preparation method of a film capacitor comprises the following working procedures of winding, cold pressing, hot baking, gold spraying and post working procedures, and is characterized in that the preparation method and the steps thereof are as follows in sequence:
(1) Winding: the metallized polypropylene film is overlapped and then wound to form a core;
(2) Cold pressing: flattening the core;
(3) Pretreatment: placing the cold-pressed core in a sealed space, adjusting the temperature to 40 +/-5 ℃, adjusting the humidity RH to be below 35%, and placing for 2-10 hours;
(3) Hot pressing: preliminarily shaping the pretreated core;
(4) Spraying gold: spraying gold paint on the end surface of the core after hot pressing, so that the gold paint is in contact with the metal coating on the metallized polypropylene film and is led out;
(5) And (3) baking: placing the core subjected to metal spraying into a drying oven for shaping;
(6) And (5) post-processing.
2. The method for manufacturing a thin film capacitor as claimed in claim 1, wherein the steps after step (6) include the following steps in order:
(6.1) energization: the weak current of the core is eliminated;
(6.2) half-detection: detecting a core;
(6.3) welding: leading out the core electrode;
(6.4) assembling: loading the core into the housing;
(6.5) encapsulating: pouring the encapsulating material into the shell to fix the core;
(6.6) curing: curing the packaging material at normal temperature;
(6.7) trimming and correcting pins: correcting the electrode extraction;
(6.8) marking/lettering;
(6.9) appearance inspection;
and (6.10) packaging and warehousing.
3. The method for manufacturing a thin film capacitor as claimed in claim 1, wherein the steps (4) and (6) are performed under normal temperature and humidity conditions.
4. The method for manufacturing a thin film capacitor as claimed in claim 1, wherein the step (5) of baking is performed under the following conditions: the temperature is 120 +/-5 ℃ and the time is 8-16 hours.
5. The method for manufacturing a film capacitor as claimed in claim 1, wherein the manufactured capacitor is mounted on a motor, and has the following parameters and properties: the hum of the capacitor of the motor is less than or equal to 5 decibels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710865773.XA CN107705988B (en) | 2017-09-22 | 2017-09-22 | Preparation method of thin film capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710865773.XA CN107705988B (en) | 2017-09-22 | 2017-09-22 | Preparation method of thin film capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107705988A CN107705988A (en) | 2018-02-16 |
| CN107705988B true CN107705988B (en) | 2023-02-28 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710865773.XA Active CN107705988B (en) | 2017-09-22 | 2017-09-22 | Preparation method of thin film capacitor |
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| Country | Link |
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| CN (1) | CN107705988B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110896000A (en) * | 2018-08-24 | 2020-03-20 | 东莞市成东电子科技有限公司 | Welding process of thin film capacitor |
| CN110890229A (en) * | 2019-10-11 | 2020-03-17 | 深圳市兴创嘉技术有限公司 | Aluminum electrolytic capacitor sleeve code spraying method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101399118A (en) * | 2007-09-30 | 2009-04-01 | 扬州高强电子有限公司 | Technique for processing non-inductive organic film capacitor |
| CN104078237A (en) * | 2014-06-23 | 2014-10-01 | 浙江七星电容器有限公司 | Filter capacitor and manufacturing method thereof |
| CN206399681U (en) * | 2017-01-19 | 2017-08-11 | 东莞市全鹏电子科技有限公司 | A kind of electric capacity core precompressed sampler |
-
2017
- 2017-09-22 CN CN201710865773.XA patent/CN107705988B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101399118A (en) * | 2007-09-30 | 2009-04-01 | 扬州高强电子有限公司 | Technique for processing non-inductive organic film capacitor |
| CN104078237A (en) * | 2014-06-23 | 2014-10-01 | 浙江七星电容器有限公司 | Filter capacitor and manufacturing method thereof |
| CN206399681U (en) * | 2017-01-19 | 2017-08-11 | 东莞市全鹏电子科技有限公司 | A kind of electric capacity core precompressed sampler |
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| Publication number | Publication date |
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| CN107705988A (en) | 2018-02-16 |
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