CN103552202A - Composite bushing machining method - Google Patents
Composite bushing machining method Download PDFInfo
- Publication number
- CN103552202A CN103552202A CN201310527956.2A CN201310527956A CN103552202A CN 103552202 A CN103552202 A CN 103552202A CN 201310527956 A CN201310527956 A CN 201310527956A CN 103552202 A CN103552202 A CN 103552202A
- Authority
- CN
- China
- Prior art keywords
- conducting rod
- composite bushing
- machining method
- preheating
- mould
- 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.)
- Pending
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Classifications
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14639—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles for obtaining an insulating effect, e.g. for electrical components
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C2045/1486—Details, accessories and auxiliary operations
- B29C2045/14868—Pretreatment of the insert, e.g. etching, cleaning
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a composite bushing machining method. The composite bushing machining method comprises the following steps: mixing materials, preheating a mold and a conducting rod, injecting the materials, closing the mold, carrying out pressure maintaining, solidifying and the like. The composite bushing machining method is characterized in that the conducting rod is subjected to sand blasting treatment firstly before the conducting rod is preheated, a sand blasting grinding material is brown aluminium oxide, and the particle size of the blasting grinding material is 0.1-0.8mm; in the material mixing working procedure, the placement time from the uniform stirring of the mixture to the material injection is 7-8 hours. The composite bushing machining method has the advantages that the surface of the metal conducting rod is subjected to sand blasting treatment firstly before the conducting rod is preheated, so that the roughness can be improved, and the contact area can be enlarged, thus when epoxy pressure gel is molded, the bonding strength between the conducting rod and the epoxy resin is obviously improved, and the elimination of air vents and air gaps can be facilitated; in addition, the placement time of the mixture is prolonged, and the improvement of the viscosity of the mixture is facilitated, so that the purpose of eliminating the air vents and the air gaps is further achieved.
Description
[technical field]
The invention belongs to a kind of processing method of electric equipment element, especially relate to a kind of and processing method matching used composite bushing of high-pressure inflating cabinet.
[background technology]
Composite bushing is mainly for separating of formula insulated connection system, connection transformer, switch and other are equipped with the electrical equipment of insulating oil, while being applied in high-pressure inflating cabinet, for guaranteeing high-pressure inflating cabinet air-tightness, the electrical equipment in its cabinet need outwards be connected to cable or bus by the composite bushing through being solded into.Therefore, the performance of composite bushing will directly affect the insulating properties of electrical equipment and the security reliability of operation.The structure of existing composite bushing comprises insulator, and is located at the conducting rod inserts in this insulator mesopore, both through mould by epoxy compound APG technological forming.There are the following problems for the composite bushing of making according to existing processing technology: interiors of products pore, air gap are many, poor electrical performance, be difficult to meet under 28kV voltage conditions, partial discharge quantity must be less than the standard of 3pC, product percent of pass can only reach 77% left and right, not only increase substantially production cost, but also had a strong impact on the security performance of electrical equipment.
[summary of the invention]
The problems referred to above that exist for solving prior art, the present invention aims to provide a kind of composite bushing processing method, the composite bushing that utilizes the method to produce, its product percent of pass, that is: the compliance rate that embodies the partial discharge quantity of electrical property can reach more than 98%.
For achieving the above object, the present invention has adopted following technical scheme: this composite bushing processing method, comprises the following steps:
(1) batch mixing: take epoxy resin, curing agent, silica flour and mill base by proportioning and pour in container, stir;
(2) mould and die preheating: mould is heated;
(3) conducting rod preheating: will be up to the standards, and the metal conducting bar after cleaning heats;
(4) material feeding: the conducting rod after preheating is inserted in mould, then the batch mixing in container is injected in mould, matched moulds pressurize are solidified; It is characterized in that: before described conducting rod preheating, first this conducting rod is carried out to blasting treatment, sand-blasting abrasive is brown corundum, and its particle diameter is 0.1-0.8mm; In described compounding process, compound is from stirring, and be 7-8 hour the standing time to material feeding.
In practice, take described standing time 7.5 hours, brown corundum particle diameter as 0.5mm best.
Beneficial effect: compared with prior art, the present invention first carries out blasting treatment to metal conducting bar surface before conducting rod preheating, increase roughness and bond area, thereby when casting, not only make the adhesive strength that conducting rod is combined with epoxy resin be improved significantly, and be conducive to eliminate pore, air gap.In addition, extend batch mixing standing time, be conducive to increase the viscosity of compound, further eliminate pore, air gap, minimizing office high-volume.Product is through multiple batches of check, and result shows: compound 3-4 hour standing time, and qualification rate is 85% left and right, compound 5-6 hour standing time, and qualification rate is 93% left and right, compound 7-8 hour standing time, and qualification rate is more than 98%.
For deepening the understanding of the present invention, below by embodiment, be described in further detail.
[specific embodiment]
Because relevant manufacturing procedure of the present invention is same as the prior art, comprise the demoulding after matched moulds, pressurize solidify, solidify afterwards, polishing, polishing and inspection process, to this part operation, will repeat no more, following examples are only described the operation of improvement part, to sharpen understanding.
Conducting rod sandblast operation: first will not need sandblast position to fix by frock, sandblast position should be exposed outside swivel nut, is convenient to sandblast and puts in place.Checkout facility successively, puts on that work clothes puts on one's glasses and mouth mask, opens work hatch door, ready conducting rod is lain on workbench, and close work hatch door.Operating personnel are hand-held sand-blasting machine on the other hand, rotates on the other hand conducting rod, and sandblast distance is generally 85-150mm.After sandblast, whether evenly can estimate conducting rod surface sand-blasting, determine whether fill spray.Conducting rod after sandblast need clean with alcohol, removes surperficial sand dust and greasy dirt, depending on climatic condition, selects nature dry or dry.Then by warehouse-in after rice paper packing, stand-by.
Embodiment mono-:
The particle diameter of sand-blasting abrasive palm fibre corundum is 0.1mm; Compound standing time is 7 hours, and production quantity is 300, and what office was high-volume less than 3pC is 296, and product percent of pass is 98.6%.
Embodiment bis-:
The particle diameter of sand-blasting abrasive palm fibre corundum is 0.5mm; Compound standing time is 7.5 hours, and production quantity is 300, and what office was high-volume less than 3pC is 297, and product percent of pass is 99%.
Embodiment tri-:
The particle diameter of sand-blasting abrasive palm fibre corundum is 0.8mm; Compound standing time is 8 hours, and production quantity is 300, and what office was high-volume less than 3pC is 296, and product percent of pass is 98.6%.
Embodiment tetra-:
The particle diameter of sand-blasting abrasive palm fibre corundum is 0.8mm; Compound standing time is 9 hours, and production quantity is 300, and what office was high-volume less than 3pC is 296, and product percent of pass is 98.6%.
From many experiments, after compound standing time surpassing 8 hours, its product percent of pass is stabilized in 98.6% left and right, and there is no too large increase, therefore, we are set as 7-8 hour standing time by compound, both be conducive to improve product percent of pass, and also can have guaranteed production efficiency.
Claims (2)
1. a composite bushing processing method, comprises the following steps:
(1) batch mixing: take epoxy resin, curing agent, silica flour and mill base by proportioning and pour in container, stir;
(2) mould and die preheating: mould is heated;
(3) conducting rod preheating: will be up to the standards, and the metal conducting bar after cleaning heats;
(4) material feeding: the conducting rod after preheating is inserted in mould, then the batch mixing in container is injected in mould, matched moulds pressurize are solidified; It is characterized in that: before described conducting rod preheating, first this conducting rod is carried out to blasting treatment, sand-blasting abrasive is brown corundum, and its particle diameter is 0.1-0.8mm; In described compounding process, compound is from stirring, and be 7-8 hour the standing time to material feeding.
2. processing method as claimed in claim 1, is characterized in that: be 7.5 hours described standing time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310527956.2A CN103552202A (en) | 2013-10-31 | 2013-10-31 | Composite bushing machining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310527956.2A CN103552202A (en) | 2013-10-31 | 2013-10-31 | Composite bushing machining method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103552202A true CN103552202A (en) | 2014-02-05 |
Family
ID=50006640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310527956.2A Pending CN103552202A (en) | 2013-10-31 | 2013-10-31 | Composite bushing machining method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103552202A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112092283A (en) * | 2020-08-27 | 2020-12-18 | 浙江省开化七一电力器材有限责任公司 | APG production method and device for casing |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1899794A (en) * | 2006-07-22 | 2007-01-24 | 刘辉南 | Method for producing silicon rubber mutual inductor |
| CN101834062A (en) * | 2010-05-14 | 2010-09-15 | 山东达驰电气有限公司 | Sealing structure of bushing insulator and conducting rod and pouring method thereof |
| CN102241868A (en) * | 2010-05-11 | 2011-11-16 | 上海赛沃化工材料有限公司 | Epoxy resin composition for high-voltage power insulation |
| CN202454355U (en) * | 2012-03-13 | 2012-09-26 | 浙江瑞德新材料有限公司 | Composite bushing |
| CN102814892A (en) * | 2012-08-09 | 2012-12-12 | 河南平高电气股份有限公司 | Epoxy casting part manufacturing method and epoxy casting insulator manufacturing method |
| CN103029247A (en) * | 2011-09-29 | 2013-04-10 | 株式会社东芝 | Electrical insulating cast article and manufacturing method thereof |
-
2013
- 2013-10-31 CN CN201310527956.2A patent/CN103552202A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1899794A (en) * | 2006-07-22 | 2007-01-24 | 刘辉南 | Method for producing silicon rubber mutual inductor |
| CN102241868A (en) * | 2010-05-11 | 2011-11-16 | 上海赛沃化工材料有限公司 | Epoxy resin composition for high-voltage power insulation |
| CN101834062A (en) * | 2010-05-14 | 2010-09-15 | 山东达驰电气有限公司 | Sealing structure of bushing insulator and conducting rod and pouring method thereof |
| CN103029247A (en) * | 2011-09-29 | 2013-04-10 | 株式会社东芝 | Electrical insulating cast article and manufacturing method thereof |
| CN202454355U (en) * | 2012-03-13 | 2012-09-26 | 浙江瑞德新材料有限公司 | Composite bushing |
| CN102814892A (en) * | 2012-08-09 | 2012-12-12 | 河南平高电气股份有限公司 | Epoxy casting part manufacturing method and epoxy casting insulator manufacturing method |
Non-Patent Citations (1)
| Title |
|---|
| 董祥忠: "《现代塑料成型工程（第1版）》", 30 September 2009, article "浇注成型", pages: 272-274 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112092283A (en) * | 2020-08-27 | 2020-12-18 | 浙江省开化七一电力器材有限责任公司 | APG production method and device for casing |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140205 |