CN106449020A - Environment-friendly transformer for potting epoxy resin employing lost-wax process and preparation method of environment-friendly transformer - Google Patents
Environment-friendly transformer for potting epoxy resin employing lost-wax process and preparation method of environment-friendly transformer Download PDFInfo
- Publication number
- CN106449020A CN106449020A CN201610889511.2A CN201610889511A CN106449020A CN 106449020 A CN106449020 A CN 106449020A CN 201610889511 A CN201610889511 A CN 201610889511A CN 106449020 A CN106449020 A CN 106449020A
- Authority
- CN
- China
- Prior art keywords
- epoxy resin
- transformer
- transformer body
- environment
- skeleton
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
- H01F27/022—Encapsulation
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
-
- 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
- B29C39/14—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 indefinite length
- B29C39/18—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 indefinite length incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
-
- 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
- B29C39/26—Moulds or cores
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/005—Impregnating or encapsulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2063/00—Use of EP, i.e. epoxy resins or derivatives thereof, as moulding material
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Insulating Of Coils (AREA)
Abstract
The invention discloses an environment-friendly transformer with a housing for potting epoxy resin employing a lost-wax process and a method for preparing the environment-friendly transformer; and the environment-friendly transformer is simple in structure, good in sealing effect and high in insulating protection capability and does not pollute the environment. The environment-friendly transformer comprises a transformer body, wherein the transformer body comprises a skeleton (1), a finished coil wound on the skeleton (1) and a silicon steel sheet (2) sleeving the skeleton (1); a plurality of connection pins (3) are arranged on the upper end surface of the skeleton (1); an integrally molded epoxy resin layer (4) coats the periphery of the overall transformer body; and the connection pins (3) are exposed on the epoxy resin layer (4) at the upper part of the skeleton (1). The preparation method comprises the following steps of (a) prefabricating a wax mold; (b) potting the epoxy resin; (c) putting the wax mold into the transformer body; and (d) removing wax and forming the transformer a demolding manner. The environment-friendly transformer can be used for the field of electronic devices.
Description
Technical field
The present invention relates to field of electronic devices, more particularly, to a kind of environmental protection transformer of lost-wax process encapsulated epoxy resin, with
And the method preparing this environmental protection transformer using lost-wax process.
Background technology
Electronics industry grows continuously and fast in recent years, has driven electronic devices and components industry with electronic transformer as representative
Powerful development；Meanwhile, the fast development of domestic and international electronic information technology industry, also brings to numerous electronic devices and components manufacturers
Wide market prospects.For electronic transformer industry, huge market had both brought wide development space, also brought
The opportunity promoting Transformer Manufacturing Enterprises itself to update, only responds actively the market demand, improving product quality, improves
Product processes, improve production efficiency, could establish oneself in an unassailable position in fierce market competition.
At present, in electronic transformer production field, with excellent insulation performance, sealing is complete, can for embedding type power transformer product
By the feature that property degree is high, environmental suitability is strong, favored by numerous instrument and meter producers, market prospects are very considerable.Often
The pot electronics transformer of rule is will to install the transformer semi-finished product of iron core aborning, is placed in prefabricated encapsulating shell, then
The casting epoxy resin in encapsulating shell, the flow feature using epoxy resin liquid is filled out to the remaining space in encapsulating shell
Fill, seal, play the effect of reinforced insulation protection.But the power output size due to electronic transformer differs, its profile chi
Very little also different, so it is accomplished by preparing in advance the package casing mould of all size to process special shell for embedding,
Relatively costly.Epoxy resin generally requires and completes embedding by artificial operation machinery equipment, by factors such as machine vibration
Impact, transformer lead pin and case surface are highly prone to epoxy resin pollution, easily cause bad order, need to expend more artificial
Carry out clean appearance, need to put into great cost of labor.Additionally, how the shell of electronic transformer is by thermoplastic materials such as PBT
Process, affected by factors such as temperature in process, be susceptible to deformation, this is unfavorable for the installation of transformer, with
When there is the hidden danger that shell comes off from transformer body；In addition, the shell that traditional transformer is used is PBT material, PBT conduct
Not degradable material, is difficult to reclaim after the product life cycle terminates, and this can cause environmental pollution.So, improve existing change
The production technology of depressor, improve production efficiency, is the positive way catering to the market demand.
Content of the invention
The technical problem to be solved is to overcome the deficiencies in the prior art, provides that a kind of structure is simple, sealing effect
Really good, insulating protection ability is strong and the environmental protection transformer of the lost-wax process encapsulated epoxy resin of shell that will not produce pollution environment.
Present invention also offers a kind of preparation method of above-mentioned environmental protection transformer, the method process is simple, without transformer
Shell, and special outer casing mold need not be set, cost savings cost, need not manually the transformer of shaping be become meanwhile
Product carry out follow-up process for decontamination, cost savings cost of labor.
The environmental protection transformer of lost-wax process encapsulated epoxy resin of the present invention be employed technical scheme comprise that：Described environmental protection becomes
Depressor includes transformer body, and described transformer body is by skeleton, the completion coil that is wound on described skeleton and be set in institute
State the silicon steel sheet composition on skeleton, some wiring pin are provided with the upper surface of described skeleton, in entirely described transformer originally
The periphery of body is coated with one layer of integrally formed epoxy resin layer, and above described skeleton, described wiring pin is exposed described
On epoxy resin layer.
Such scheme is visible, and the environmental protection transformer of present invention preparation passes through in transformer body periphery encapsulated epoxy resin,
Eliminate and traditional also need to save material cost and processing cost in the special PBT shell of periphery setting；In addition, asphalt mixtures modified by epoxy resin
Lipid layer is passed through to be coated on transformer body periphery with being integrally formed, and transformer is played with excellent sealing effectiveness and is greatly enhanced
The insulating protection ability of transformer；Additionally, environmental protection transformer structure of the present invention is simple, it is integrally formed, preparation is convenient.
Further, described epoxy resin layer is coated on the periphery of described transformer body by way of embedding.
Such scheme is visible, carries out epoxy resin layer embedding by epoxy resin automatic filling and sealing machine, and it is easy to operate, flow process
Simply, existing Equipment Foundations can achieve, save development cost.
The preparation method of above-mentioned environmental protection transformer comprises the following steps：
A. prefabricated wax mould：In transformer pallet add the high temperature resistant paraffin of fluid, to be solidified after, formed high temperature resistant stone
The die cavity being matched with transformer body is set in wax layer；
B. epoxy resin encapsulated：By epoxy resin automatic filling and sealing machine by epoxy resin encapsulated in described die cavity；
C. insert transformer body：Transformer body after completion is placed in the die cavity of described step a, until except described
Entirely described transformer body beyond wiring pin is partly wrapped up by epoxy resin completely；
D. remove deparaffnize：After the epoxy resin cure of embedding, high temperature resistant paraffin layer is heated, treat that high temperature resistant paraffin layer melts
After change, transformer stripping forming, obtain the environmental protection transformer being coated with epoxy resin layer.
Such scheme is visible, and compared with traditional handicraft, the method for lost-wax process encapsulated epoxy resin of the present invention operates more
Convenient, after epoxy resin encapsulated shaping solidification, transformer is molded it is not necessary to carry out particular manufacturing craft manufacture, then high temperature melting melts stone
Wax layer, it is convenient in demoulding fast, and the wax mould after fusing repeats and utilizes, and mould utilization factor is high, also shortens production
Cycle；After transformer life cycle terminates, due to avoiding using plastic casings such as PBT, so two will not be caused to environment
Secondary pollution, has good social benefit；Additionally, first carrying out epoxy resin perfusion, after put into transformer body, transformation can be avoided
Device wiring pin is polluted by epoxy resin, reduces the bad ratio of product appearance, avoids simultaneously and is manually removed polluting
Cost；Additionally, the present invention all potting operation link all can be completed by conventional transformer epoxy resin automatic filling and sealing machine, no
Production equipment must being updated, thus avoiding the problem of equipment compatibility, having saved the production cost of enterprise.
Further, in described step b, the embedding amount of epoxy resin so that transformer body to be inserted after die cavity, except institute
State that the entirely described transformer body beyond wiring pin is partly wrapped up by epoxy resin completely and epoxy resin does not overflow and is defined.
Such scheme is visible, depending on the embedding amount of epoxy resin is according to specific transformer size, puts in transformer body
After entering in die cavity, epoxy resin does not overflow, thus ensure that die surface is not polluted by epoxy resin, also wall epoxy resin
Waste.
Further, in described step a, described transformer pallet is made up of tray body and handle, in described tray body
In the high temperature resistant paraffin layer of the solidification of interior formation, the number of the die cavity of setting is several, and this several described die cavity is fitly arranged
Row.
Such scheme is visible, and the setting of handle is so that the extraction of tray body is convenient；And the high temperature resistant stone on tray body
Wax layer arranges multiple die cavitys, once can carry out multiple epoxy resin encapsulateds, greatly increase operating efficiency.
Brief description
Fig. 1 is the cross section structure diagram of described environmental protection transformer；
Fig. 2 is the easy structure schematic diagram of described environmental protection transformer；
Fig. 3 is the easy structure schematic diagram of described transformer pallet；
Fig. 4 is the sectional structure chart of described transformer pallet.
Specific embodiment
As depicted in figs. 1 and 2, in the present invention, described environmental protection transformer includes transformer body, described transformer body by
Skeleton 1, the completion coil being wound on described skeleton 1 and the silicon steel sheet 2 being set on described skeleton 1 form, in described skeleton 1
Upper surface on be provided with some wiring pin 3.It is coated with one layer of integrally formed ring in the periphery of entirely described transformer body
Oxygen tree lipid layer 4, above described skeleton 1, described wiring pin 3 is exposed on described epoxy resin layer 4.Described epoxy resin
Layer 4 is coated on the periphery of described transformer body by way of embedding.
As shown in Figure 3 and Figure 4, when preparing above-mentioned transformer, its step is as follows：
A. prefabricated wax mould：In transformer pallet 5 add the high temperature resistant paraffin of fluid, to be solidified after, formed high temperature resistant
The die cavity 7 being matched with transformer body is set in paraffin layer 6.Described transformer pallet 5 is made up of tray body 51 and handle 52,
In the high temperature resistant paraffin layer 6 of solidification being formed in described tray body 51, the number of the die cavity 7 of setting is several, this several
Described die cavity 7 fitly arranges.
B. epoxy resin encapsulated：By epoxy resin automatic filling and sealing machine by epoxy resin encapsulated in described die cavity 7；Epoxy
The entirely described transformer body to insert transformer body after die cavity 7, in addition to described wiring pin 3 for the embedding amount of resin
Partly by epoxy resin parcel, epoxy resin does not overflow and is defined completely.
C. insert transformer body：Transformer body after completion is placed in the die cavity 7 of described step a, until removing
Entirely described transformer body beyond described wiring pin 3 is partly wrapped up by epoxy resin completely；
D. remove deparaffnize：After the epoxy resin cure of embedding, high temperature resistant paraffin layer 6 is heated, treat high temperature resistant paraffin layer 6
After thawing, transformer stripping forming, obtain the environmental protection transformer being coated with epoxy resin layer.
The transformer external structure being prepared by the inventive method and installation dimension be not substantially poor with common transformer
Different, preferable effect has also been reached on essential electrical performance.The inventive method process is simple, without transformer case, and no
Special outer casing mold need to be set, cost savings cost, need not manually the transformer finished products of shaping be carried out subsequently meanwhile
Process for decontamination, cost savings cost of labor.
Present invention can apply to field of electronic devices.
Claims (5)
1. a kind of environmental protection transformer of lost-wax process encapsulated epoxy resin, including transformer body, described transformer body is by skeleton
（1）, be wound on described skeleton（1）On completion coil and be set in described skeleton（1）On silicon steel sheet（2）Composition, described
Skeleton（1）Upper surface on be provided with some wiring pin（3）It is characterised in that：Periphery bag in entirely described transformer body
It is covered with one layer of integrally formed epoxy resin layer（4）, in described skeleton（1）Top, described wiring pin（3）Expose in described ring
Oxygen tree lipid layer（4）On.
2. lost-wax process encapsulated epoxy resin according to claim 1 environmental protection transformer it is characterised in that：Described asphalt mixtures modified by epoxy resin
Lipid layer（4）It is coated on the periphery of described transformer body by way of embedding.
3. a kind of preparation method of the environmental protection transformer of lost-wax process encapsulated epoxy resin as claimed in claim 1, its feature exists
In the method comprises the following steps：
A. prefabricated wax mould：In transformer pallet（5）Interior addition the high temperature resistant paraffin of fluid, to be solidified after, formed resistance to height
Fire stons wax layer（6）The die cavity that middle setting is matched with transformer body（7）；
B. epoxy resin encapsulated：By epoxy resin automatic filling and sealing machine by epoxy resin encapsulated to described die cavity（7）In；
C. insert transformer body：Transformer body after completion is placed into the die cavity of described step a（7）In, until except
Described wiring pin（3）Entirely described transformer body in addition is partly wrapped up by epoxy resin completely；
D. remove deparaffnize：After the epoxy resin cure of embedding, to high temperature resistant paraffin layer（6）Heated, treated high temperature resistant paraffin
Layer（6）After thawing, transformer stripping forming, obtain the environmental protection transformer being coated with epoxy resin layer.
4. the environmental protection transformer of lost-wax process encapsulated epoxy resin according to claim 3 preparation method it is characterised in that：
In described step b, the embedding amount of epoxy resin is to insert die cavity by transformer body（7）Afterwards, except described wiring pin（3）In addition
Entirely described transformer body partly completely by epoxy resin wrap up and epoxy resin does not overflow and is defined.
5. the environmental protection transformer of lost-wax process encapsulated epoxy resin according to claim 3 preparation method it is characterised in that：
In described step a, described transformer pallet（5）By tray body（51）And handle（52）Composition, in described tray body（51）Interior shape
The high temperature resistant paraffin layer of the solidification becoming（6）The die cavity of middle setting（7）Number be several, this several described die cavity（7）Whole
Arrange together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610889511.2A CN106449020B (en) | 2016-10-12 | 2016-10-12 | Environmental protection transformer of lost-wax process encapsulated epoxy resin and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610889511.2A CN106449020B (en) | 2016-10-12 | 2016-10-12 | Environmental protection transformer of lost-wax process encapsulated epoxy resin and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106449020A true CN106449020A (en) | 2017-02-22 |
| CN106449020B CN106449020B (en) | 2017-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610889511.2A Active CN106449020B (en) | 2016-10-12 | 2016-10-12 | Environmental protection transformer of lost-wax process encapsulated epoxy resin and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108447653A (en) * | 2018-03-14 | 2018-08-24 | 珠海市新化磁性材料有限公司 | A kind of inductive transformer and preparation method thereof |
| CN110246672A (en) * | 2019-06-19 | 2019-09-17 | 无锡新畅电子有限公司 | Glue filling process of glue filling transformer |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB874072A (en) * | 1956-07-17 | 1961-08-02 | Napron Ltd | Improvements in or relating to the moulding of fibrous material coated and/or impregnated with plaster |
| CN1223914A (en) * | 1998-12-21 | 1999-07-28 | 纪汉伟 | Process for making mould by wax injection |
| CN101630587A (en) * | 2009-06-30 | 2010-01-20 | 珠海市康定电子器件有限公司 | Technique for producing transformer |
| CN204270809U (en) * | 2014-07-24 | 2015-04-15 | 珠海市康定电子股份有限公司 | A kind of non-crossing laminated transformer |
| CN204966258U (en) * | 2015-08-12 | 2016-01-13 | 珠海市康定电子股份有限公司 | Take self -resuming protection device's transformer |
| CN205303136U (en) * | 2015-12-27 | 2016-06-08 | 珠海市康定电子股份有限公司 | Long -life transformer based on it optimizes structure to indulge insulating properties |
| CN206059088U (en) * | 2016-10-12 | 2017-03-29 | 珠海市康定电子股份有限公司 | The environmental protection transformer of lost-wax process encapsulated epoxy resin |
-
2016
- 2016-10-12 CN CN201610889511.2A patent/CN106449020B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB874072A (en) * | 1956-07-17 | 1961-08-02 | Napron Ltd | Improvements in or relating to the moulding of fibrous material coated and/or impregnated with plaster |
| CN1223914A (en) * | 1998-12-21 | 1999-07-28 | 纪汉伟 | Process for making mould by wax injection |
| CN101630587A (en) * | 2009-06-30 | 2010-01-20 | 珠海市康定电子器件有限公司 | Technique for producing transformer |
| CN204270809U (en) * | 2014-07-24 | 2015-04-15 | 珠海市康定电子股份有限公司 | A kind of non-crossing laminated transformer |
| CN204966258U (en) * | 2015-08-12 | 2016-01-13 | 珠海市康定电子股份有限公司 | Take self -resuming protection device's transformer |
| CN205303136U (en) * | 2015-12-27 | 2016-06-08 | 珠海市康定电子股份有限公司 | Long -life transformer based on it optimizes structure to indulge insulating properties |
| CN206059088U (en) * | 2016-10-12 | 2017-03-29 | 珠海市康定电子股份有限公司 | The environmental protection transformer of lost-wax process encapsulated epoxy resin |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108447653A (en) * | 2018-03-14 | 2018-08-24 | 珠海市新化磁性材料有限公司 | A kind of inductive transformer and preparation method thereof |
| CN110246672A (en) * | 2019-06-19 | 2019-09-17 | 无锡新畅电子有限公司 | Glue filling process of glue filling transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106449020B (en) | 2017-12-12 |
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