CN103035366A - Plastic shell and method for manufacturing core perforating type current transformer - Google Patents
Plastic shell and method for manufacturing core perforating type current transformer Download PDFInfo
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- CN103035366A CN103035366A CN2012104826115A CN201210482611A CN103035366A CN 103035366 A CN103035366 A CN 103035366A CN 2012104826115 A CN2012104826115 A CN 2012104826115A CN 201210482611 A CN201210482611 A CN 201210482611A CN 103035366 A CN103035366 A CN 103035366A
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- plastic casing
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- epoxy resin
- plastic shell
- current transformer
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Abstract
The invention discloses a plastic shell and a method for manufacturing a core perforating type current transformer, which are used for improving production efficiency and reducing production cost. The method comprises the following steps of preparing ABS (acrylonitrile-butadiene-styrene) plastic shells; placing an iron core of a mutual inductor and a binding post in the plastic shell and fixing well, welding the two symmetrical plastic shells by laser seal welding to form a cavity to be cast and remain an injection orifice opening; and at last, injecting an epoxy resin mixed maternal, which is stirred evenly, into the plastic shell by an epoxy resin injection machine (APG), standing the plastic shell at a normal temperature for solidifying, and the like. The plastic shell and the method have the advantages of reducing the production cost of an enterprise, improving production efficiency, omitting the step of solidifying at the high temperature in the original production process, saving time and cost of using a high temperature oven, and bringing obvious economic benefits to the enterprise, and capacity of greatly increasing production.<p align=''justify''></p>.
Description
Technical field
The present invention relates to a kind of making new technology of straight-through current transformer, specifically a kind of method of utilizing plastic casing Mold Making straight-through current transformer.
Background technology
The straight-through current transformer technological process of production of the poured with epoxy resin that generally uses at present is as follows: the epoxy resin batch mixing vacuumizes at vacuum tank, batch mixing is injected into mould by the APG injector, hot setting in mould, curing and demolding for the first time, in high temperature roaster, again solidify after the demoulding, make finished product.See technological process shown in the accompanying drawing 1 for details.
In above-mentioned traditional handicraft, solidify for the first time and must in mould, finish during owing to production, so production efficiency is subject to the very big restriction of number of molds, if number of molds is few, disposablely can only do several products, but will increase number of molds, the expense of die sinking also can increase.In addition, also reaching a few hours the curing time in the high temperature roaster, also is the bottleneck of enhancing productivity.
Summary of the invention
For enhancing productivity, reduce production costs, the invention provides a kind of plastic casing and utilize the method for this plastic casing Mold Making straight-through current transformer.
The technical solution adopted for the present invention to solve the technical problems is: a kind of plastic casing, it is characterized in that, described plastic casing comprise have same structure and in pairs symmetrical use about two plastic casings, two plastic casings use respectively the ABS plastic injection moulding integrated molding, and two plastic casing mating surfaces adopt Laser seal welding to form one, the bottom of described plastic casing is provided with installing hole, and the top of described plastic casing is provided with plug hole.
A kind of described plastic casing of claim 1 that utilizes may further comprise the steps as the method for Mold Making straight-through current transformer:
The first step, the ABS plastic (having become liquid) that at first utilizes injection molding machine will be heated to 240 ℃ injects outer casing mold, again outer casing mold cooling, the demoulding are obtained plastic casing, because the ABS plastic shell condensation time only needed about one minute, and epoxy resin solidifies for the first time three ten minutes that need and wants much shorter in the former technique in mould, behind the plastics demoulding, can carry out the injection moulding of next secondary plastic casing, efficient improves greatly, so can be with once the needs that can satisfy a large amount of production plastic casings to two secondary moulds;
Second step is positioned over transformer iron core, binding post in the plastic casing and fixes, and adopts Laser seal welding to weld the plastic casing of two symmetries, forms a cavity to be cast, and it is uncovered to stay injection orifice;
The 3rd step, use again epoxy resin injection machine (APG) the epoxy resin batch mixing that injection stirs in the plastic casing, inject complete after, normal temperature leaves standstill curing and gets final product.
In described third step, in epoxy resin, add the normal temperature cure agent, so that the epoxy resin batch mixing after the cast is not more than 48 hours curing time under 20 ℃ of temperature conditions, normal temperature cure gets final product.
The invention has the beneficial effects as follows: after adopting this technique, transformer casing no longer adopts the direct curing molding of epoxy resin, but adopts ABS plastic shell straight forming, need not form removal.Epoxy resin is without hot setting, and employing normal temperature cure method.Can take full advantage of the performance of injector, after need not as former technique, need waiting for the demoulding, could in mould, carry out the cast second time, can produce hundreds of instrument transformer in one day in batches like this, since need to be in high temperature roaster hot setting, shorten the production cycle greatly, changed the situation that to produce more than 10 instrument transformers with last secondary mould in one day.
The invention has the advantages that the production cost that has reduced enterprise, improved production efficiency, the link of hot setting in the original production process is saved, both saved the time, save again the expense of using high temperature roaster, can significantly improve output, brought obvious economic benefit to enterprise.
Description of drawings
Fig. 1 is original process route chart;
Fig. 2 is process route chart of the present invention;
Fig. 3 is the front view of plastic casing;
Fig. 4 is the upward view of Fig. 3;
Fig. 5 is the left view of Fig. 3.
Among the figure: 1 plastic casing, 11 weld seams, 12 installing holes, 13 plug holes.
Embodiment
Such as Fig. 2～shown in Figure 5,
A kind of plastic casing, plastic casing comprise have same structure and in pairs symmetrical use about two plastic casings 1, two plastic casings use respectively the ABS plastic injection moulding integrated molding, and two plastic casing mating surfaces adopt Laser seal welding to form one, form a weld seam 11, the bottom of plastic casing is provided with installing hole 12, and the top of plastic casing is provided with plug hole 13.Example straight-through current transformer as shown above, the words of producing by the plastic casing technique in the patent, only need separately make K face and L face two half-shells, transformer iron core and binding post etc. are fixing, then adopt the method for Laser seal welding to weld together in K face and L face shell, the top is reserved with plug hole.Again the epoxy resin filler that has added the normal temperature cure agent is injected into the ABS plastic shell with the APG injector by plug hole, leaves standstill curing and get final product.After pouring, plug hole is sticked get final product with making label, need not form removal.
ABS plastic wherein, chemical name: acrylonitrile-butadiene-styrene (ABS) plastics, English name Acrylonitrile Butadiene Styrene plastic.
Plastics ABS is nontoxic, tasteless, and it is ivory white translucent that outward appearance is, or transparent grain or powdery.Density is 1.05～1.18g/ ㎝ 3, and shrinkage is 0.4%～0.9%, and elastic mould value is 0.2Gpa, and Poisson ratio is 0.394, moisture absorption＜1%, 217～237 ℃ of melt temperatures, heat decomposition temperature〉250 ℃.
A kind of method of utilizing plastic casing Mold Making straight-through current transformer may further comprise the steps:
The first step, the ABS plastic (having become liquid) that at first utilizes injection molding machine will be heated to 240 ℃ injects outer casing mold, again outer casing mold cooling, the demoulding are obtained plastic casing, because the ABS plastic shell condensation time only needed about one minute, and epoxy resin solidifies for the first time three ten minutes that need and wants much shorter in the former technique in mould, behind the plastics demoulding, can carry out the injection moulding of next secondary plastic casing, efficient improves greatly, so can be with once satisfying need of production to two secondary moulds;
Second step will be positioned over transformer iron core, binding post in the plastic casing and fix, and adopt Laser seal welding to weld the plastic casing of two symmetries, and it is uncovered to stay injection orifice;
The 3rd step, use again epoxy resin injection machine (APG) in plastic casing, to inject the epoxy resin batch mixing that stirs, in epoxy resin, add the normal temperature cure agent, realize the purpose of normal temperature cure, so that the epoxy resin batch mixing after the cast is under 20 ℃ of temperature conditions, be not more than 48 hours curing time, inject complete after, normal temperature leaves standstill curing and gets final product.
Embodiment recited above is described preferred implementation of the present invention; be not that scope of the present invention is limited; design under the prerequisite of spirit not breaking away from the present invention; the relevant technical staff in the field all should expand as in the determined protection range of claims of the present invention various distortion of the present invention and improvement.
Claims (3)
1. plastic casing, it is characterized in that, described plastic casing comprise have same structure and in pairs symmetrical use about two plastic casings, two plastic casings use respectively the ABS plastic injection moulding integrated molding, and two plastic casing mating surfaces adopt Laser seal welding to form one, the bottom of described plastic casing is provided with installing hole, and the top of described plastic casing is provided with plug hole.
2. a method of utilizing the described plastic casing Mold Making of claim 1 straight-through current transformer is characterized in that, may further comprise the steps:
The first step, the ABS plastic that at first utilizes injection molding machine will be heated to 240 ℃ injects outer casing mold, again outer casing mold cooling, the demoulding is obtained plastic casing;
Second step is positioned over transformer iron core, binding post in the plastic casing and fixes, and adopts Laser seal welding to weld the plastic casing of two symmetries, and it is uncovered to stay injection orifice;
The 3rd step, use again epoxy resin injection machine (APG) the epoxy resin batch mixing that injection stirs in the plastic casing, inject complete after, normal temperature leaves standstill curing and gets final product.
3. a kind of method of utilizing plastic casing Mold Making straight-through current transformer according to claim 2, it is characterized in that, in described third step, in epoxy resin, add the normal temperature cure agent, so that the epoxy resin batch mixing after the cast is not more than 48 hours curing time under 20 ℃ of temperature conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210482611.5A CN103035366B (en) | 2012-11-23 | 2012-11-23 | Method for manufacturing core perforating type current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210482611.5A CN103035366B (en) | 2012-11-23 | 2012-11-23 | Method for manufacturing core perforating type current transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103035366A true CN103035366A (en) | 2013-04-10 |
| CN103035366B CN103035366B (en) | 2015-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210482611.5A Expired - Fee Related CN103035366B (en) | 2012-11-23 | 2012-11-23 | Method for manufacturing core perforating type current transformer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107154605A (en) * | 2016-03-02 | 2017-09-12 | 矢崎总业株式会社 | The manufacture method of Belt connector box and Belt connector box |
| CN107561337A (en) * | 2017-09-01 | 2018-01-09 | 全球能源互联网研究院 | The preparation method of optical fiber current mutual inductor and its prepared optical fiber current mutual inductor |
| CN108063329A (en) * | 2017-12-08 | 2018-05-22 | 中国船舶重工集团公司第七二四研究所 | The high current line bank and its encapsulating method of a kind of anti-adverse environment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2177282Y (en) * | 1993-07-22 | 1994-09-14 | 荆门供电局电力计量所 | Current transformer |
| CN201004358Y (en) * | 2006-12-11 | 2008-01-09 | 苏保东 | A bus array current mutual inductor |
| CN201163572Y (en) * | 2008-01-24 | 2008-12-10 | 浙江天正电气股份有限公司 | Current mutual inductor |
-
2012
- 2012-11-23 CN CN201210482611.5A patent/CN103035366B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2177282Y (en) * | 1993-07-22 | 1994-09-14 | 荆门供电局电力计量所 | Current transformer |
| CN201004358Y (en) * | 2006-12-11 | 2008-01-09 | 苏保东 | A bus array current mutual inductor |
| CN201163572Y (en) * | 2008-01-24 | 2008-12-10 | 浙江天正电气股份有限公司 | Current mutual inductor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107154605A (en) * | 2016-03-02 | 2017-09-12 | 矢崎总业株式会社 | The manufacture method of Belt connector box and Belt connector box |
| CN107154605B (en) * | 2016-03-02 | 2019-03-19 | 矢崎总业株式会社 | The manufacturing method of Belt connector box and Belt connector box |
| CN107561337A (en) * | 2017-09-01 | 2018-01-09 | 全球能源互联网研究院 | The preparation method of optical fiber current mutual inductor and its prepared optical fiber current mutual inductor |
| CN108063329A (en) * | 2017-12-08 | 2018-05-22 | 中国船舶重工集团公司第七二四研究所 | The high current line bank and its encapsulating method of a kind of anti-adverse environment |
| CN108063329B (en) * | 2017-12-08 | 2019-12-13 | 中国船舶重工集团公司第七二四研究所 | Severe environment resistant large current line bank and its filling and sealing method |
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| CN103035366B (en) | 2015-07-22 |
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Granted publication date: 20150722 Termination date: 20151123 |