CN104723485A - Forming mold of indoor mutual inductor and pouring sealing method of forming mold - Google Patents
Forming mold of indoor mutual inductor and pouring sealing method of forming mold Download PDFInfo
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- CN104723485A CN104723485A CN201410700496.3A CN201410700496A CN104723485A CN 104723485 A CN104723485 A CN 104723485A CN 201410700496 A CN201410700496 A CN 201410700496A CN 104723485 A CN104723485 A CN 104723485A
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- mutual inductor
- mold
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- mould
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Abstract
The invention discloses a forming mold of an indoor mutual inductor and a pouring sealing method of the forming mold. The forming mold comprises an upper mold and a lower mold which defines a mold die cavity, wherein the upper mold is provided with a pouring hole and an exhaust hole which are communicated with the mold die cavity; a mold core is arranged in the mold die cavity, the upper end of the mold core is in the shape of Chinese character 'tu', the lower end of the mold core is in a crossed shape, and the part, positioned in the mold die cavity, of the mold core is cylindrical; a group of insulating supporting columns for supporting a mutual inductor coil is arranged around the mold core in the mold die cavity and is movably connected with the lower mold; the upper end of each insulating supporting column is provided with a step-shaped buckling platform for being buckled with the lower edge of the mutual inductor coil; and a wire outlet hole is formed in a connection position between the upper mold and the lower mold. The forming mold disclosed by the invention has the advantages that the resin pouring sealing efficiency of the indoor mutual inductor can be improved, the unit energy consumption and the rejection rate of the indoor mutual inductor are reduced, the insulating degree of the indoor mutual inductor is improved, and the indoor mutual inductor can be prevented from threatening personal safety when being broken down by high voltage.
Description
Technical field
The invention belongs to the manufacturing technology field of indoor mutual inductor, particularly relate to a kind of mould and cast sealing method thereof of indoor mutual inductor.
Background technology
10 kilovolts of pouring current transformers are widely used in the power equipments such as switch cubicle, indoor 10 KV mutual-inductors normally divide 2 times or repeatedly just can complete after resin-cast sealing at present, such 2 times or repeatedly pour into a mould sealing mode and cause result to be: cast or the injection grinding tool of input are many; Workload and working strength large; Finished product specific energy consumption is high; Finished product manufacturer is many for man-hour; 2 times or the binding site repeatedly poured into a mould easily occur that air pocket causes Excess Partial Discharge; 2 times or the binding site repeatedly poured into a mould combine and loosely occur that gap causes binding site to ftracture and causes insulation degree to decline, and often cause the breakdown phenomenon of transformer, make the secondary device be connected with transformer damage and threaten to personal safety.This just needs the problem of repeatedly pouring into a mould sealing generation for former outdoor 10 KV mutual-inductors, in its production process, the resin-cast sealing method of transformer is improved, to enhance productivity, reduce specific energy consumption and the percent defective of product, improve its insulation degree, prevent indoor mutual inductor from threatening to personal safety because high voltage is breakdown.
Summary of the invention
The present invention is in order to solve the problems of the prior art, a kind of mould and resin-cast sealing method thereof of indoor mutual inductor are provided, the resin-cast sealing efficiency of indoor mutual inductor can be improved, reduce specific energy consumption and the percent defective of indoor mutual inductor, improve its insulation degree, prevent indoor mutual inductor from threatening to personal safety because high voltage is breakdown.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: the mould of indoor mutual inductor, it comprises the upper die and lower die for surrounding mold cavity, described patrix offers the plug hole and steam vent that are communicated with described mold cavity, core rod is provided with in described mold cavity, the two ends up and down of described core rod are connected with upper die and lower die respectively, the upper end of described core rod is set to convex shape, described patrix offers the upper groove matched with described convex shape core rod upper end, the lower end of described core rod is set to cross, described counterdie offers the low groove matched with described cross core rod lower end, the part that described core rod is positioned at mold cavity is cylindrical, described mold cavity inner ring winding mold core is provided with one group for supporting the insulation column of mutual inductor coil, described insulation column is made up of insulating materials, the upper end of insulation column is provided with the stairstepping chuck for clamping mutual inductor coil lower limb, described counterdie offers the brace groove matched with described insulation column lower end, described insulation column is flexibly connected with counterdie by brace groove, and the position that upper die and lower die connect offers the wire hole for placing mutual inductor coil outlet.
One group of described insulation column is made up of 3 insulation columns, and 3 insulation columns are positioned on same circle, and the central angle between adjacent insulation column is set to 120 °.
The side of described upper die and lower die is fixedly installed upper mounted plate and bottom plate respectively, and fixed plate and bottom plate are corresponding up and down and be fixedly connected with by fastening bolt.
Use above-mentioned mould to carry out the cast sealing method of indoor mutual inductor, the method comprises the following steps:
1) unclamp fastening bolt, take off patrix;
2) first upper die and lower die are cleaned, and at upper die and lower die, core rod and 3 brace groove brushing releasing agent on the surface, again 3 insulation columns are placed in brace groove respectively, and then mutual inductor coil is placed on the upper end surface of 3 insulation columns, make mutual inductor coil lower limb and the clamping of stairstepping chuck, mutual inductor coil outlet is placed in wire hole simultaneously;
3) close patrix, after upper die and lower die are alignd, then upper mounted plate and bottom plate is fastened as a whole by the fastening upper die and lower die that make of fastening bolt:
4) mould that step 3 obtains is placed on the mould erecting bed that resin extrudes injector automatically, and 2 hours are incubated under 110 degrees Celsius, then resin is automatically extruded injector and is poured into a mould by plug hole, keeps 110 degrees Celsius to continue insulations 2 hours after casting complete;
5) from resin automatically extrude injector mould erecting bed take out mould carry out die sinking, the transformer that die sinking obtains remains with 3 insulation columns and each insulation column has the projection had more on transformer, then this transformer is placed in incubator under 110 degrees Celsius, be incubated 8 hours;
6) projection that the insulation column of 3 on the transformer of step 5 gained has more is polished off, namely complete the cast sealing of indoor mutual inductor.
Beneficial effect of the present invention:
The cooperation of core rod and insulation column in mould of the present invention, enables this operation of resin-cast sealing of indoor mutual inductor complete in once-cast process, the two ends up and down of described core rod are connected with upper die and lower die respectively, the upper end of described core rod is set to convex shape, described patrix offers the upper groove matched with described convex shape core rod upper end, be separated with core rod when when die sinking is convenient in this design, patrix is upwards mentioned, the lower end of described core rod is set to cross, described counterdie offers the low groove matched with described cross core rod lower end, be separated with counterdie when when die sinking is convenient in this design, core rod is upwards mentioned, the part that described core rod is positioned at mold cavity is cylindrical, being separated between transformer with core rod after die sinking is convenient in the design of this core rod, demoulding when this structural design of core rod both ensure that die sinking is smooth, and the convex shape of core rod upper end and the cross of lower end, it is relative to the core rod of complete vertical cyclindrical shape, the clamping of core rod and upper die and lower die is more firm, ensure that core rod can not shake in casting process, the side of upper die and lower die is fixedly installed upper mounted plate and bottom plate respectively, fixed plate and bottom plate are corresponding up and down and be fixedly connected with by fastening bolt, this structural design makes to produce axial restraint between upper die and lower die, prevents from producing axial dipole field between upper die and lower die, one group of insulation column is made up of 3 insulation columns, and 3 insulation columns are positioned on same circle, are set to 120 ° of central angles between adjacent insulation column, and this design ensure that insulated coil stablizing on 3 insulation columns, the upper end of insulation column is provided with the stairstepping chuck for clamping mutual inductor coil lower limb, in the draw-in groove that the stairstepping chuck that this structural design enables mutual inductor coil be connected to 3 insulation columns is formed, avoids mutual inductor coil to produce skew, described counterdie offers the brace groove matched with described insulation column lower end, described insulation column is flexibly connected with counterdie by brace groove, the transformer that this structural design die sinking obtains remains with 3 insulation columns and each insulation column has the projection had more on transformer, this projection is polished off the cast sealing namely completing indoor mutual inductor, simple and convenient.
The present invention is by being modified into mould, this operation of resin-cast sealing of manufacture indoor mutual inductor is once completed, prove that cast sealing method of the present invention decreases mould over half and drops into by test, improve production efficiency, reduce the specific energy consumption of product, greatly reduce percent defective, and improve insulation degree, prevent indoor mutual inductor from threatening to personal safety because high voltage is breakdown.
Accompanying drawing explanation
Fig. 1 is the structural front view of mould in the present invention;
Fig. 2 is the structure top view of mould in the present invention;
Fig. 3 is A-A generalized section in Fig. 2;
Fig. 4 is the structural representation of core rod in the present invention;
Fig. 5 is the structural representation of insulation column in the present invention.
Detailed description of the invention
Below in conjunction with Fig. 1 to Fig. 5, structure of the present invention and the course of work are further described.
The mould of indoor mutual inductor of the present invention, it comprises patrix 1 for surrounding mold cavity 15 and counterdie 2, the position that patrix 1 is connected with counterdie 2 offers the wire hole 5 for placing mutual inductor coil outlet 6, described patrix 1 offers the plug hole 11 be communicated with described mold cavity and steam vent 12, core rod 4 is provided with in described mold cavity 15, the two ends up and down of described core rod 1 are connected with patrix 1 and counterdie 2 respectively, the upper end 4-1 of described core rod 4 is set to convex shape, described patrix 1 offers the upper groove 16 matched with described convex shape core rod upper end 4-1, be separated with core rod 4 when when die sinking is convenient in this design, patrix 1 is upwards mentioned, the lower end 4-3 of described core rod 4 is set to cross, described counterdie 2 offers the low groove 17 matched with described cross core rod lower end 4-3, be separated with counterdie 2 when when die sinking is convenient in this design, core rod 4 is upwards mentioned, the part 4-2 that described core rod 4 is positioned at mold cavity 15 is cylindrical, being separated between transformer with core rod 4 after die sinking is convenient in this design, demoulding when this structural design of core rod 4 both ensure that die sinking is smooth, and the convex shape of core rod 4 upper end 4-1 and the cross of lower end 4-2, it is relative to the core rod of complete vertical cyclindrical shape, core rod 4 is more firm with the clamping of patrix 1 and counterdie 2, ensure that core rod 4 can not shake in casting process.
Described mold cavity 15 inner ring winding mold core 4 is provided with one group for supporting the insulation column 7 of mutual inductor coil 3, insulation column 7 is made up of insulating materials, one group of insulation column 7 is made up of 3 insulation columns 7, 3 insulation columns 7 are positioned on same circle, central angle alpha between adjacent insulation column 7 is set to 120 °, the upper end of insulation column 7 is provided with the stairstepping chuck 7-1 for clamping mutual inductor coil 3 lower limb, in the draw-in groove that the stairstepping chuck 7-1 that stairstepping chuck 7-1 makes mutual inductor coil 3 can be connected to 3 insulation columns 7 is formed, mutual inductor coil 3 is avoided to produce skew, described counterdie 2 offers the brace groove 18 matched with described insulation column 7 lower end, described insulation column 7 is flexibly connected with counterdie 3 by brace groove 18, the transformer that this structural design die sinking obtains remains with 3 insulation columns 7 and each insulation column 7 has the projection had more on transformer, this projection is polished off the cast sealing namely completing indoor mutual inductor, simple and convenient.
The position that described counterdie 2 contacts with described patrix 1 is provided with counterdie projection 13, the position that described patrix 1 contacts with described counterdie 2 offers the patrix groove 14 matched with described counterdie projection 13, described counterdie projection 13 is connected in described patrix groove 14, this structural design makes to produce radial fixing between patrix 1 and counterdie 2, prevents from producing radial deflection between patrix 1 and counterdie 2; The side moving described patrix 1 and counterdie 2 is fixedly installed upper mounted plate 9 and bottom plate 10 respectively, fixed plate 9 and bottom plate about 10 are corresponding and be fixedly connected with by fastening bolt 8, this structural design makes to produce axial restraint between patrix 1 and counterdie 2, prevents from producing axial dipole field between patrix 1 and counterdie 2.
The present embodiment also discloses the cast sealing method using above-mentioned mould to carry out indoor mutual inductor, and the method comprises the following steps:
1) unclamp fastening bolt 8, take off patrix 1;
2) first patrix 1 and counterdie 2 is cleaned, and at patrix 1, counterdie 2, core rod 4 and 3 brace groove 18 brushing releasing agent on the surface, again 3 insulation columns 7 are placed in brace groove respectively, and then mutual inductor coil 3 is placed on the upper end surface of 3 insulation columns 7, make mutual inductor coil 3 lower limb and stairstepping chuck 7-1 clamping, the mutual inductor coil outlet 6 of mutual inductor coil 3 is placed in wire hole 5 simultaneously;
3) close patrix 1, after patrix 1 and counterdie 2 are alignd, then upper mounted plate 9 and bottom plate 10 is fastened as a whole by fastening patrix 1 and the counterdie 2 of making of fastening bolt 81:
4) mould that step 3 obtains is placed on the mould erecting bed that resin extrudes injector automatically, and 2 hours are incubated under 110 degrees Celsius, then resin is automatically extruded injector and is poured into a mould by plug hole, keeps 110 degrees Celsius to continue insulations 2 hours after casting complete;
5) from resin automatically extrude injector mould erecting bed take out mould carry out die sinking, the transformer that die sinking obtains remains with 3 insulation columns 7 and each insulation column has the projection had more on transformer, then this transformer is placed in incubator under 110 degrees Celsius, be incubated 8 hours;
6) projection that the insulation column of 3 on the transformer of step 5 gained 7 has more is polished off, namely complete the cast sealing of indoor mutual inductor.
The indoor mutual inductor obtained also can carry out silica gel sealing again, namely can be used for the use (resin automatically extrudes the protruding and silica gel packaging of the resin injection of injector, die sinking, polishing and is the ordinary skill in the art, and the present embodiment no longer describes in detail) of outdoor mutual inductor.
Above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: still can modify to the present invention or equivalent replacement, and not departing from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (4)
1. the mould of indoor mutual inductor, it comprises the upper die and lower die for surrounding mold cavity, described patrix offers the plug hole and steam vent that are communicated with described mold cavity, it is characterized in that: in described mold cavity, be provided with core rod, the two ends up and down of described core rod are connected with upper die and lower die respectively, the upper end of described core rod is set to convex shape, described patrix offers the upper groove matched with described convex shape core rod upper end, the lower end of described core rod is set to cross, described counterdie offers the low groove matched with described cross core rod lower end, the part that described core rod is positioned at mold cavity is cylindrical, described mold cavity inner ring winding mold core is provided with one group for supporting the insulation column of mutual inductor coil, described insulation column is made up of insulating materials, the upper end of insulation column is provided with the stairstepping chuck for clamping mutual inductor coil lower limb, described counterdie offers the brace groove matched with described insulation column lower end, described insulation column is flexibly connected with counterdie by brace groove, and the position that upper die and lower die connect offers the wire hole for placing mutual inductor coil outlet.
2. the mould of indoor mutual inductor according to claim 1, is characterized in that: one group of described insulation column is made up of 3 insulation columns, and 3 insulation columns are positioned on same circle, and the central angle between adjacent insulation column is set to 120 °.
3. the mould of indoor mutual inductor according to claim 2, it is characterized in that: the side of described upper die and lower die is fixedly installed upper mounted plate and bottom plate respectively, fixed plate and bottom plate are corresponding up and down and be fixedly connected with by fastening bolt.
4. use the method for the mould cast sealing indoor mutual inductor described in claim 3, it is characterized in that the method comprises the following steps:
1) unclamp fastening bolt, take off patrix;
2) first upper die and lower die are cleaned, and at upper die and lower die, core rod and 3 brace groove brushing releasing agent on the surface, again 3 insulation columns are placed in brace groove respectively, and then mutual inductor coil is placed on the upper end surface of 3 insulation columns, make mutual inductor coil lower limb and the clamping of stairstepping chuck, mutual inductor coil outlet is placed in wire hole simultaneously;
3) close patrix, after upper die and lower die are alignd, then upper mounted plate and bottom plate is fastened as a whole by the fastening upper die and lower die that make of fastening bolt:
4) mould that step 3 obtains is placed on the mould erecting bed that resin extrudes injector automatically, and 2 hours are incubated under 110 degrees Celsius, then resin is automatically extruded injector and is poured into a mould by plug hole, keeps 110 degrees Celsius to continue insulations 2 hours after casting complete;
5) from resin automatically extrude injector mould erecting bed take out mould carry out die sinking, the transformer that die sinking obtains remains with 3 insulation columns and each insulation column has the projection had more on transformer, then this transformer is placed in incubator under 110 degrees Celsius, be incubated 8 hours;
6) projection that the insulation column of 3 on the transformer of step 5 gained has more is polished off, namely complete the cast sealing of indoor mutual inductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410700496.3A CN104723485A (en) | 2014-11-28 | 2014-11-28 | Forming mold of indoor mutual inductor and pouring sealing method of forming mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410700496.3A CN104723485A (en) | 2014-11-28 | 2014-11-28 | Forming mold of indoor mutual inductor and pouring sealing method of forming mold |
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| Publication Number | Publication Date |
|---|---|
| CN104723485A true CN104723485A (en) | 2015-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410700496.3A Pending CN104723485A (en) | 2014-11-28 | 2014-11-28 | Forming mold of indoor mutual inductor and pouring sealing method of forming mold |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109285649A (en) * | 2017-07-21 | 2019-01-29 | 平高集团有限公司 | Magnet ring pours dress, magnet ring casting mold and magnet ring and pours dress production method |
| CN114628136A (en) * | 2022-03-22 | 2022-06-14 | 横店集团东磁股份有限公司 | Inductor forming die |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06196347A (en) * | 1992-12-22 | 1994-07-15 | Toshiba Corp | Method and apparatus for manufacturing insulating resin molded form |
| US20090212196A1 (en) * | 2001-09-26 | 2009-08-27 | Lavalle Al | Method of making an electrical inductor using a sacrificial electrode |
| CN103286897A (en) * | 2013-05-17 | 2013-09-11 | 宁波奥克斯高科技有限公司 | Manufacturing method of casting type high-pressure coil mold |
| CN204263437U (en) * | 2014-11-28 | 2015-04-15 | 许昌永新电气股份有限公司 | The mould of indoor mutual inductor |
-
2014
- 2014-11-28 CN CN201410700496.3A patent/CN104723485A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06196347A (en) * | 1992-12-22 | 1994-07-15 | Toshiba Corp | Method and apparatus for manufacturing insulating resin molded form |
| US20090212196A1 (en) * | 2001-09-26 | 2009-08-27 | Lavalle Al | Method of making an electrical inductor using a sacrificial electrode |
| CN103286897A (en) * | 2013-05-17 | 2013-09-11 | 宁波奥克斯高科技有限公司 | Manufacturing method of casting type high-pressure coil mold |
| CN204263437U (en) * | 2014-11-28 | 2015-04-15 | 许昌永新电气股份有限公司 | The mould of indoor mutual inductor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109285649A (en) * | 2017-07-21 | 2019-01-29 | 平高集团有限公司 | Magnet ring pours dress, magnet ring casting mold and magnet ring and pours dress production method |
| CN114628136A (en) * | 2022-03-22 | 2022-06-14 | 横店集团东磁股份有限公司 | Inductor forming die |
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Application publication date: 20150624 |