CN109940806B - Basin-type insulator pouring mold - Google Patents
Basin-type insulator pouring mold Download PDFInfo
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- CN109940806B CN109940806B CN201910169558.5A CN201910169558A CN109940806B CN 109940806 B CN109940806 B CN 109940806B CN 201910169558 A CN201910169558 A CN 201910169558A CN 109940806 B CN109940806 B CN 109940806B
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- 239000012212 insulator Substances 0.000 title claims abstract description 43
- 238000010438 heat treatment Methods 0.000 claims abstract description 152
- 239000000463 material Substances 0.000 claims description 29
- 239000003822 epoxy resin Substances 0.000 claims description 27
- 229920000647 polyepoxide Polymers 0.000 claims description 27
- 238000010125 resin casting Methods 0.000 claims description 15
- 238000005266 casting Methods 0.000 claims description 7
- 238000004017 vitrification Methods 0.000 claims description 5
- 239000011241 protective layer Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 12
- 238000000465 moulding Methods 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 4
- 230000003993 interaction Effects 0.000 abstract description 2
- 238000007493 shaping process Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Images
Abstract
The invention belongs to the technical field of pouring processes, and particularly relates to a basin-type insulator pouring mold. The mold comprises a male mold and a female mold, wherein the male mold is provided with an inner conical surface facing away from a mold cavity, the female mold is provided with an outer conical surface facing away from the mold cavity, heating elements are arranged on the inner conical surface of the male mold and/or the outer conical surface of the female mold, and the heating elements comprise a first heating element, a second heating element and a third heating element. The heating element for heating the mould is arranged, different heating areas are divided, and heating treatment is carried out in the basin-type insulator forming process, so that the aim of uniform heating can be well fulfilled; the unformed insulator is successively solidified through different temperature zones, so that the interaction force of the insulator connecting parts is reduced, and the condition that the expansion and shrinkage of the whole insulator are uneven is relieved. Therefore, different positions of the basin-type insulator are cured more uniformly in the molding process, the defects of sink marks, cavities and the like of the produced insulator are greatly reduced, and the molding quality is higher.
Description
Technical Field
The invention belongs to the technical field of pouring processes, and particularly relates to a basin-type insulator pouring mold.
Background
The basin-type insulator is generally cast by epoxy resin material as important equipment in the field of high-voltage switch equipment, the epoxy resin is thermosetting resin, the thermosetting resin is injected into a mold and is maintained for a period of time at a certain temperature to carry out crosslinking reaction, and finally, the curing is finished, wherein the curing is quicker when the temperature is higher under the general condition. Taking an epoxy resin material which is currently used as an example, the temperature of the injected epoxy resin material is about 130 ℃, and the injection temperature is kept for about 12 hours after the injection of the epoxy resin material into a mold, so that the mold release state can be achieved. Of course, the temperature parameter and the time parameter used in the curing process of the epoxy resin may be different, and the temperature parameter and the time parameter used in the curing process of different epoxy resins may also be different. The curing process is used as a key link in an epoxy resin vacuum pouring process, the size of an epoxy resin insulation pouring piece is not only related, but also the performance of a product is directly influenced.
Chinese utility model patent document with publication number CN201342770Y discloses an epoxy resin insulation casting spare self-heating mould for vacuum casting, include the mould that is formed by positive template and negative template armor, the two all is equipped with the conical surface structure that conforms with shaping back insulator shape and closes the back with positive template and negative template, and the space between the two forms the die cavity that is used for shaping basin formula insulator, and the one side that the formpiston dorsad die cavity has the interior conical surface, and the one side that the bed die dorsad die cavity has the outer conical surface. The male die plate and the female die plate are respectively provided with a heating area, different heating areas can be set to different temperatures to heat the die, specifically, the heating pipes heat corresponding areas, and the areas where the heating pipes are located form a temperature area.
Although the heating pipe of the mold can heat the mold, the heating area of the heating pipe is small, the area where the heating pipe is arranged is concentrated in the middle of the mold, the mold can be heated locally, heating unevenness of the mold is caused, and forming quality of the basin-type insulator is affected.
Disclosure of Invention
The invention aims to provide a basin-type insulator pouring mold, which can solve the problem that the forming quality is influenced because the basin-type insulator is not uniformly heated by the pouring mold in the prior art.
In order to achieve the purpose, the basin-type insulator casting mold adopts the following technical scheme:
basin formula insulator casting mold, including formpiston and bed die, the formpiston has the interior conical surface of die cavity dorsad, and the bed die has the external conical surface of die cavity dorsad, be provided with the heating element who is used for heating the mould on the interior conical surface of formpiston and/or the external conical surface of bed die, heating element is including the first heating element that is close to the sprue gate setting of the radial one side of mould, sets up the second heating element in the region that corresponds along the horizontal direction with the inserts of insulator and keeps away from the third heating element that the sprue gate set up.
The beneficial effects of the above technical scheme are: the inner conical surface of the male die of the die and/or the outer conical surface of the female die are/is provided with the heating elements for heating the die, different heating areas are divided, heating treatment in the basin-type insulator forming process can be carried out by setting different temperatures in the different heating areas, the whole die cavity is fully distributed from top to bottom after the castable enters the die, the castable in the middle is the most, and the purpose of uniform heating can be realized by setting the different heating areas; the temperature is related to the curing speed, the higher the temperature is, the faster the curing speed is, different temperature zones are arranged on the premise of uniform heating, the curing speed of the castable in the mold can be controlled, unformed insulators are cured successively through the different temperature zones, the interaction force of the insulator connecting parts is reduced, and the condition that the expansion and shrinkage of the whole insulator are not uniform is relieved. Therefore, different positions of the basin-type insulator are cured more uniformly in the molding process, the defects of sink marks, cavities and the like of the produced insulator are greatly reduced, and the molding quality is higher.
Further, the heating element is a heating plate disposed on an outer surface of the mold. The heating plate is used for heating, so that the heating area is more uniform, and the heating effect is better.
Further, a protective layer is arranged on the outer side of the heating sheet. The protective layer can avoid the heating plate from being collided and scratched in the using process.
Furthermore, the radial outer side surface of the mold is provided with side heating elements, the side heating elements are arranged at least three positions, the side heating elements at all the positions are distributed up and down along the radial outer side surface of the mold, and the set heating temperature of each side heating element is increased from bottom to top in sequence. Set up heating element simultaneously at the side of mould for it is more even to be heated in the curing forming process of epoxy material in the mould, and the curing effect is better.
Furthermore, in the side heating elements, the area of the side heating element located in the middle is larger than the area of the side heating element located on the upper and lower sides. When the die is used for pouring, the pouring material is fully distributed in the whole die cavity from top to bottom, and the middle of the basin-type insulator occupies a larger volume and needs the most pouring material, so that the area of the side heating element positioned in the middle is designed to be larger than the area of the side heating elements positioned on the upper side and the lower side of the middle in order to ensure that the pouring material in the middle is heated more uniformly.
Drawings
FIG. 1 is a schematic view of a mold without a heating plate;
FIG. 2 is a perspective view of a mold with heating fins;
FIG. 3 is a front view of a mold with heating fins disposed thereon (as viewed from the side of the inner taper of the male mold);
FIG. 4 is a schematic perspective view of a mold provided with a guard plate;
FIG. 5 is a first schematic structural view of the mold in a pouring state;
FIG. 6 is a second schematic structural view of the mold in the pouring state;
description of reference numerals: 1-male die, 101-male die inner conical surface, 2-female die, 201-female die outer conical surface, 3-first region, 301-first heating plate, 4-second region, 401-second heating plate, 5-third region, 501-third heating plate, 6-heating plate, 7-fixing seat, 8-pouring gate and 9-protection plate.
Detailed Description
The following further describes the embodiments of the present invention with reference to the drawings.
The embodiment of the basin-type insulator pouring mold of the invention comprises the following steps:
as shown in fig. 1, the mold for the basin-type insulator includes a male mold 1 and a female mold 2, wherein cavities for molding workpieces are disposed in both the male mold 1 and the female mold 2, and both have conical surface structures, specifically, an inner conical surface is disposed on one side of the male mold facing away from the cavities, and an outer conical surface is disposed on one side of the female mold facing away from the cavities. The male die 1 and the female die 2 can enclose a die cavity for forming the basin-type insulator after being assembled through the connecting flange.
As shown in fig. 2, 3 and 6, three heating regions are provided in the mold, specifically, the three heating regions are a first region 3 provided near the sprue gate 8 on one side of the mold in the radial direction, a middle region, i.e., a second region 4, of the mold corresponding to the insert of the basin-type insulator in the horizontal direction, and a third region 5 adjacent to the second region 4 and provided far from the sprue gate 8.
Correspondingly, each heating area is provided with a heating element corresponding to the first heating element, the second heating element and the third heating element, and the heating elements are heating sheets, i.e. the first heating sheet 301, the second heating sheet 401 and the third heating sheet 501. The die is fixed to the female die external conical surface 201 and the male die internal conical surface 101 in the die by self-tapping screws, and particularly, the die is fixed along three set heating zones. In addition, be provided with along the side of mould along the upper and lower direction many heating plates 6, side heating element promptly, wherein, because the pouring material in the middle part of the mould is the most, in order to make the pouring material in middle part be heated more evenly, the area of heating plate 6 in middle part is greater than the area of the side heating element of its upper and lower both sides, like this, whole basin formula insulator is when the shaping, and the circumference of mould is heated more evenly, and solidification shaping is also more even. In order to protect the mold, a protection plate 9 is further disposed outside the first heating plate 301, the second heating plate 401, the third heating plate 501 and the heating plate 6, as shown in fig. 4, the protection plate 9 can prevent the first heating plate 301, the second heating plate 401, the third heating plate 501 and the heating plate 6 from being scratched by collision during use. In this embodiment, the first heating element, the second heating element, the third heating element and the side heating element are heating sheets made of the same material.
Because the mold is vertically placed during curing treatment, namely the axis is in a horizontal state, the pouring gate is upward, the epoxy resin casting material is used as a main material for manufacturing the basin-type insulator, the epoxy resin casting material flows into the mold from top to bottom, if different heating regions are set to be at the same temperature, the epoxy resin casting material in a first region 3, a second region 4, a third region 5 and the like in the mold can reach the curing temperature at the same time, and thus, the space formed by the epoxy resin casting material in the three regions after vitrification shrinkage can not be compensated, and the produced basin-type insulator has shrinkage marks and cavities, the temperatures of the three heating regions in the mold are set to be different temperatures, the temperature for vitrification shrinkage after curing of the epoxy resin material is 126 ℃, and the temperatures of the three regions are specifically set to be 116-121 ℃ according to multiple molding tests, the second zone 4 was 122 deg.C-127 deg.C, the third zone 5 was 128 deg.C-133 deg.C, and the temperature difference between the layers was set to 6 deg.C. Therefore, after the epoxy resin casting material enters the mold from the pouring gate 8 at the upper end, because the temperature of the third area 5 at which the lower end is located is high, the epoxy resin casting material at the lower end reaches the curing temperature at first, and then begins to vitrify and shrink, and the corresponding volume is reduced, at this time, the epoxy resin casting material close to the upper part does not reach the curing temperature yet, and can fall down in time, so that the space left after the epoxy resin casting material at the lower end is vitrified and shrunk is supplemented in time, that is, the filling and feeding operation is carried out, and the difference of the vitrification conversion temperatures of the heating areas is small. By the mode, the temperature of each part of the die is controlled, correspondingly, the basin-type insulator is more uniformly cured, the defects of sink marks, cavities and the like of the produced basin-type insulator are greatly reduced, and the forming quality is higher.
The epoxy resin casting material at the lowest end is cured firstly, and heating of the heating area can be stopped after curing, so that the heating time of each heating area is set in a gradually decreasing manner from top to bottom, specifically, in this embodiment, the heating time of the first area 3 is 14 hours, the heating time of the second area 4 is 13 hours, and the heating time of the third area 5 is 12 hours, so that the curing degree of each heating area is more consistent.
A temperature control system (not shown in the figure) for controlling the first heating plate 301, the second heating plate 401, the third heating plate 501 and the heating plate 6 is further arranged around the mold, and when the mold starts to form the basin-type insulator, the temperature control system can be used for controlling each heating plate to heat, and after the heating is finished, the temperature control system controls each heating plate not to heat.
When the basin-type insulator is manufactured, as shown in fig. 2 to 6, heating regions are arranged on the female die outer conical surface 201 and the male die inner conical surface 101, heating sheets are fixed on the heating regions and the peripheral surface of the side wall of the mold through self-tapping screws, a protection plate 9 is arranged outside each heating sheet, then the mold with each heating sheet is vertically placed, and is supported through a fixing seat 7. Pouring in epoxy resin material from sprue gate 8, through the first heating plate 301 of the three heating region of temperature control system control, second heating plate 401, heating plate 6 on the lateral wall global of third heating plate 501 and mould begins to heat, set for first region 3 heat time and be 14 hours, second region 4 heat time is 13 hours, third region 5 heat time is 12 hours, after pending the completion, carry out the drawing of patterns, and put into the oven and carry out the secondary cure, the curing temperature sets up to 130 ℃, the secondary cure time is 11 hours, and thus, the solidification of basin formula insulator is more even, the defects such as shrinkage mark and the cavity that the basin formula insulator that produces exists reduce greatly, shaping quality is higher.
In this embodiment, the heating zones are provided on the female die external conical surface and the male die internal conical surface. In other embodiments, the heating zones may be provided only on the inner conical surface of the male mold or only on the outer conical surface of the female mold.
In this embodiment, a shielding plate is further disposed outside the first heat fin, the second heat fin, the third heat fin, and the heat fin. In other embodiments, no guard plate may be provided.
In this embodiment, the side heating elements are arranged at a plurality of positions in the up-and-down direction on the side edge of the mold. In other embodiments, the number of the side heating elements can be three or selected according to actual needs.
In this embodiment, the radially outer side of the mold is provided with side heating elements. In other embodiments, the side heating element may be disposed on the upper end surface of the connecting flange.
In this embodiment, the heating element and the side heating element are both heating sheets. In other embodiments, the heating elements may also be spaced apart heating rods inserted into the mold.
In this embodiment, as shown in fig. 3, the first heating plate 301, the second heating plate 401 and the third heating plate 501 of the female mold inner conical surface are provided with heating plates at intervals on the outer sides thereof, and in other embodiments, the first heating plate 301, the second heating plate 401 and the third heating plate 501 may be provided integrally with the respective outer heating plates.
Claims (3)
1. Basin formula insulator casting mold, including formpiston and bed die, the formpiston has the interior conical surface of die cavity dorsad, and the bed die has the outer conical surface of die cavity dorsad, its characterized in that: the outer conical surface of a female die and the inner conical surface of a male die in the die are provided with three heating areas, the three heating areas are respectively a first area which is close to a pouring gate on one side in the radial direction of the die, a second area which corresponds to an insert of a basin-type insulator along the horizontal direction and is provided with the die, and a third area which is adjacent to the second area and is far away from the pouring gate, each heating area is provided with a heating element, the radial outer side surface of the die is provided with a side heating element, the side heating elements are provided with at least three positions, the side heating elements are distributed up and down along the radial outer side surface of the die, the set heating temperature of each side heating element is sequentially increased from bottom to top, the heating elements are heating sheets arranged on the outer surface of the die, the die is vertically placed during curing, the axis of the die is in a horizontal state, the epoxy resin casting material flows into the die from top to bottom, the first area, the second area and the third area are sequentially and adjacently arranged along the vertical direction, the temperature of the three areas is set to be 116-121 ℃, the temperature of the second area is 122-127 ℃, the temperature of the third area is 128-133 ℃, the temperature difference of each layer is set to be 6 ℃, after the epoxy resin casting material enters the die from a pouring gate at the upper end, the epoxy resin casting material at the lower end reaches the curing temperature at first due to the high temperature of the third area at the lower end, then vitrification shrinkage is started, the corresponding volume is reduced, the epoxy resin casting material at the upper part does not reach the curing temperature, the epoxy resin casting material can fall in time, and the space left after vitrification shrinkage of the epoxy resin casting material at the lower end is supplemented in time.
2. The casting mold for basin-type insulators according to claim 1, wherein: and a protective layer is arranged on the outer side of the heating sheet.
3. The casting mold for basin-type insulators according to claim 1, wherein: among the side heating elements, the area of the side heating element positioned in the middle is larger than the area of the side heating elements positioned on the upper side and the lower side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910169558.5A CN109940806B (en) | 2019-03-06 | 2019-03-06 | Basin-type insulator pouring mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910169558.5A CN109940806B (en) | 2019-03-06 | 2019-03-06 | Basin-type insulator pouring mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109940806A CN109940806A (en) | 2019-06-28 |
| CN109940806B true CN109940806B (en) | 2021-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910169558.5A Active CN109940806B (en) | 2019-03-06 | 2019-03-06 | Basin-type insulator pouring mold |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110808136B (en) * | 2019-11-26 | 2020-05-12 | 三瑞科技(江西)有限公司 | Column type insulator production processing former |
| CN112717456A (en) * | 2020-12-24 | 2021-04-30 | 苏州市腾中钛设备制造有限公司 | Reboiler for hypergravity rectification |
| CN113921208B (en) * | 2021-09-30 | 2022-11-29 | 萍乡市汇能电气有限公司 | Ceramic suspension type cylinder head insulator spinning forming production line |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101439567B (en) * | 2008-12-25 | 2010-10-13 | 麦克奥迪（厦门）电气有限公司 | Vacuum pressure pouring process for epoxy resins insulation pouring piece of high voltage electric appliance |
| CN201342770Y (en) * | 2009-01-09 | 2009-11-11 | 麦克奥迪（厦门）电气有限公司 | Self-heating die for vacuum casting of epoxy resin insulating casting part |
| CN206913542U (en) * | 2017-06-08 | 2018-01-23 | 西安广缘电气有限公司 | A kind of pouring gate structure of disc insulator mould |
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