CN103541280A - Manufacturing method and device of transformer molding insulating components - Google Patents
Manufacturing method and device of transformer molding insulating components Download PDFInfo
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- CN103541280A CN103541280A CN201210252812.6A CN201210252812A CN103541280A CN 103541280 A CN103541280 A CN 103541280A CN 201210252812 A CN201210252812 A CN 201210252812A CN 103541280 A CN103541280 A CN 103541280A
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Abstract
The invention provides a manufacturing method and device of transformer molding insulating components. According to the manufacturing method and device, a paper-pulp high-pressure molding method is applied, and paper pulp with the concentration being 0.3-3% is compressed into a thin-shell structure product with the thickness ranging from 1 millimeter to 6 millimeters and the density ranging from 0.6 gram/cubic centimeter to 1.3 grams/cubic centimeter in a mould. The mould comprises a rigid mould body 1, a flexible mould body 2 and an enclosing frame 3, wherein the rigid mould body 1 is composed of a drainage groove 14, a screen mesh 15, a mesh pressing plate 16 and the like, and the flexible mould body 2 is composed of a flexible bag 21, a mould core 22 and a flexible mould base 23; after relative movement of the rigid mould body 1 and the flexible mould body 2 is finished, the flexible bag 21 is filled with pressure fluid, and the flexible bag 21 expands and applies pressure to a surrounding paper fiber laminated layer with the high moisture content until the surrounding paper fiber laminated layer reaches the required water content and the required thickness. Cost of the transformer molding insulating components manufactured in the manufacturing method and through the manufacturing device is reduced greatly, and the transformer molding insulating components are high in density and accurate in size. The manufacturing method and device can also be used for manufacturing pallets and other thin-shell structure products formed by the paper pulp under high pressure.
Description
Technical field
The present invention relates to take paper pulp is the shell structure goods that raw material is made, and as transformer molded insulator etc., relates in particular to transformer molded insulator preparation method and the equipment therefor of paper pulp high-pressure molding.
Background technology
The various molded insulators that use insulation paper pulp to make in transformer, all need first on paper machine, to be ferreted out thick flat l Water Paper base, then make structural member, mould pressing piece and shaped piece by l Water Paper base.Wherein shaped piece will be by moulding technician by the moulding on fetalism by hand of l Water Paper base, and production efficiency is extremely low, and product quality depends on moulding technician's experience and skill, so its price is very expensive.
Summary of the invention
In view of the profiled piece in existing transformer molded insulator and the very low present situation of mould pressing piece moulding process efficiency, the present invention proposes a kind of preparation method and the equipment therefor of paper pulp high-pressure molding technology as basic transformer molded insulator of take, the method can improve production efficiency and the product quality of mould pressing piece and shaped piece in transformer molded insulator greatly, cost of manufacture is very cheap simultaneously, will produce and bring major transformation to transformer molded insulator.
Technical solution of the present invention is achieved in that
The application patent No. is the patent of invention technology of ZL 201010542001.0, concentration is 0.3% to 3% (be defined as: in every 100 cubic centimetres of paper pulp containing 0.3 to 3 gram of absolute dried paper pulp, lower with) paper pulp be pressed into thickness with the pressure that ultimate pressure is greater than 3Mpa in enclosing 3 formula formation moulds that frame, upper die and lower die form, be that 1 to 6 millimeter, density are the shell structure goods (hereinafter to be referred as goods) of 0.7 to 1.3 gram/cc.
Formation mould enclose the floor projection profile that frame internal orifice is greater than institute's moulded products, under limiting case with the floor projection contour convergence of institute's moulded products; When product weight one timing, initial pulp density and the upper and lower mould relative motion range of the size of enclosing frame area that internal orifice encloses in technological parameter determines, encloses frame area >=product weight that internal orifice encloses/(upper and lower mould relative motion range * initial pulp density) that is:.
The counterdie of formation mould is flexible die, and patrix is rigid mould.
Structure and the operation principle of flexible die are as follows: as shown in Figure 1, the flexible pocket 21 that the molded surface of whole flexible die 2 is made by 1 to 5mm thick elastomeric material is coated, flexible pocket 21 is the core rod 22 of the rigidity similar to article shape below, the two is installed on flexible die holder 23, initial flexibility capsule 21 is close on the core rod 22 of rigidity, water in pressing process in paper pulp is extruded through the drainage groove 14 on rigid mould 1 surface, paper fiber is along the surface uniform lamination of rigid mould 1, when the distance of rigid mould 1 and flexible die 2 is 5 to 20 times of institute's moulded products design wall thickness, relative motion between the two stops, by the external world, started in flexible pocket 21, to fill pressure fluid (fluid passage does not draw) by core rod 22, flexible pocket 21 is expanded, and moisture content is higher towards periphery paper fiber lamination is exerted pressure, until the moisture in paper fiber lamination is reduced to (absolute water content) below 50%, the fibrolaminar thickness of paper is down to required size, and then the residual moisture in rigid mould 1 drainage groove is used after vacuum or compressed air emptying, the fluid being filled with in flexible pocket 21 is drained, and flexible pocket 21 returns to original form, rigid mould 1 with enclose frame 3 separated after, push to connect and coil to rigid mould 1 below, import compressed air the wet base of the goods of forming blown off to connecing on dish.
For the larger endless shaper article of internal-and external diameter ratio, as shown in Figure 2, described flexible die 2 (being comprised of flexible pocket, core rod and flexible die holder) is also corresponding loop configuration, and be enclosed within all the time to movable sealing there is cross section similar to endless shaper article, on solid or hollow cylinder 4, cylinder 4 with enclose frame 3 and be connected below flexible die 2, rigid mould 1 is when enclosing frame 3 and fasten, and the upper end of cylinder 4 contacts with rigid mould 1 just.
Structure and the operation principle of rigid mould are as follows: as shown in Figure 1, the drainage groove 14 of rigid mould 1 molded surface leads to the drainage channel (not drawing on figure) above the drainage channel enclosing on frame 3 and/or on rigidity die body, molded surface is coated with the silk screen 15 that edge extends to drainage groove 14 ends, when enclosing the internal orifice of frame 3 and be greater than the floor projection profile of molded surface, on silk screen 15 between the two, being stamped outer surface is matched in clearance with the internal orifice that encloses frame 3, the pressure network plate 16 that interior contoured surface is identical with the floor projection profile of molded surface, pressure network plate 16 is also the upper limit plate of relative motion between rigid mould 1 and flexible die 2.
Distinguishingly, rigid mould 1 can be made two lobe moulds, and as shown in Figure 3, dynamic model lobe 12 is connected with cover half lobe 11 by translating device 13; Initially, translating device 13 pushes away (drawing) by dynamic model lobe 12 and becomes a rigidity die cavity to cover half lobe 11 and with cover half lobe 11 strong bonded; Through rigid mould 1 and flexible die 2 relative motion water squeezings and flexible die 2, fill the forming process of pressure fluid water squeezing, when rigid mould 1 with enclose frame 3 separated after, when importing compressed air makes the wet base of goods separated with rigid mould 1, use translating device 13 to make rapidly dynamic model lobe 12 separated with cover half lobe 11, thereby make to have the wet base demoulding smoothly of the profiled piece 5 of nonopiate structure as shown in Figure 4.The requirement that the die joint of two lobe formula rigid mould 1 overlaps along translating device 13 direction of motion contour projections with rigid mould 1 forming surface by die joint outline line is set, and sees shown in the vestige 6 of Fig. 4 die joint on goods.
Wet base after profiled piece moulding can still adopt the way of drying in dryer, also can adopt sectional die to shape at mould inner drying.When forcing press is while being vertical, sectional die adopts wedge structure that pressure at right angle is converted to horizontal pressure force, from thermocompression forming initially to finishing, each mould lobe horizontal direction displacement is 0 to 10 millimeter.
For as positive square ring and dihedral ring-class mould pressing piece, can adopt the punch-die of rigidity to carry out moulding and HEAT SETTING.
The present invention is also applicable to moulding and the HEAT SETTING of other pulp molding shell structure goods.
Compared with prior art, advantage of the present invention is apparent:
The present invention has successfully solved the low problem of transformer molded insulator production efficiency, especially by profiled piece with dull and stereotyped wet base offhand change be in paper pulp die by forcing press straight forming, production cost is reduced greatly; Mould high-pressure molding insulating part density is higher, shape is more accurate, thereby electrical strength is higher.Simultaneously the present invention has also solved that goods that various paper mould shell structure goods exist are quantitative and density is too low thereby strength and stiffness can not meet the problem of the packing instructions for use of heavier industrial products:
Accompanying drawing explanation:
3 pages, accompanying drawing of the present invention, that is:
Fig. 1 is for making the mould signal of lead-in wire square ring for transformer;
Fig. 2 illustrates with the mould of roman square ring for making the transformer that internal diameter is larger;
Fig. 3 is for making the rigid mould signal of the lead-in wire square ring with nonopiate structure;
Fig. 4 is the lead-in wire square ring signal of nonopiate structure;
Fig. 5 is for making the mould signal of paper pulp high-pressure molding shell structure pallet.
In figure: 1, rigid mould; 11, cover half lobe; 12, dynamic model lobe; 13, translating device; 14, drainage groove; 15, silk screen; 16, pressure network plate; 2, flexible die; 21, flexible pocket; 22 core rods; 23, flexible die holder; 3, enclose frame; 4, cylinder; 5, the profiled piece of nonopiate structure; 6, the vestige of die joint on goods.
The specific embodiment
Embodiment 1: make lead-in wire square ring for transformer, initial pulp density is 0.35% left and right, sees Fig. 1, and the patrix of formation mould is rigid mould 1, and counterdie is flexible die 2; The flexible pocket 21 that the molded surface of whole flexible die 2 is made by 3 to 5mm thick elastomeric materials is completely coated, and flexible pocket 21 is the core rod 22 of rigidity below, and the two is installed on flexible die holder 23, and initial flexibility capsule 21 is close on the core rod 22 of rigidity; It is cylindrical enclosing frame 3 inner surfaces, and diameter is chosen by enclosed area >=product weight/(upper and lower mould relative motion range * initial pulp density); The drainage groove 14 of rigid mould 1 molded surface leads to the drainage channel (not drawing on figure) above the drainage channel enclosing on frame 3 and on rigidity die body, molded surface is coated with the silk screen 15 that edge extends to drainage groove 14 ends, enclose on the silk screen 15 between the internal orifice of frame 3 and the floor projection profile of molded surface and be stamped the pressure network plate 16 that outer surface is identical with the floor projection profile that encloses the internal orifice matched in clearance of frame 3, interior contoured surface and molded surface, pressure network plate 16 is also the upper limit plate of relative motion between rigid mould 1 and flexible die 2.
Water in pressing process in paper pulp is extruded through the drainage groove 14 on rigid mould 1 surface, paper fiber is along the surface uniform lamination of rigid mould 1, when the distance of rigid mould 1 and flexible die 2 is 5 to 9 times of institute's moulded products wall thickness, relative motion between the two stops, by the external world, started in flexible pocket 21, to fill pressure fluid (fluid passage does not draw) by core rod 22, flexible pocket 21 is expanded, and moisture content is higher towards periphery paper fiber lamination is exerted pressure, until the moisture in paper fiber lamination is reduced to (absolute water content) below 46%, the fibrolaminar thickness of paper is down to 1 to 3mm, and then the residual moisture in rigid mould 1 drainage groove is used after compressed air emptying, the liquid being filled with in flexible pocket 21 is drained, and flexible pocket 21 returns to original form, rigid mould 1 with enclose frame 3 separated after, push to connect and coil to rigid mould 1 below, import compressed air the wet base of the lead-in wire square ring of forming blown off to connecing on dish.
Embodiment 2: make the larger transformer of internal diameter roman square ring, see Fig. 2, difference from Example 1 is: flexible die 2 (being comprised of flexible pocket 21, core rod 22 and flexible die holder 23) is corresponding cirque structure, and being enclosed within all the time to movable sealing diameter is less than on insulation collar ring internal diameter, solid or hollow circular cylinder 4, circular cylinder 4 with enclose frame 3 and be connected below flexible die, rigid mould 1 is when enclosing frame 3 and fasten, and the upper end of circular cylinder 4 contacts with rigid mould 1 just.
Embodiment 3: make the lead-in wire square ring with nonopiate structure, rigid mould 1 can be made two lobe moulds, and as shown in Figure 3, dynamic model lobe 12 is connected with cover half lobe 11 by translating device 13; Initially, translating device 13 pushes away (drawing) by dynamic model lobe 12 and becomes a rigidity die cavity to cover half lobe 11 and with cover half lobe 11 strong bonded; Through rigid mould 1 and flexible die 2 relative motion water squeezings and flexible die 2, fill the forming process of pressure fluid water squeezing, when rigid mould 1 with enclose frame 3 separated after, when importing compressed air makes the wet base of goods separated with rigid mould 1, use translating device 13 to make rapidly dynamic model lobe 12 separated with cover half lobe 11, thereby make to have the wet base demoulding smoothly of the profiled piece 5 of nonopiate structure as shown in Figure 4.The requirement that the die joint of two lobe formula rigid mould 1 overlaps along translating device 13 direction of motion contour projections with rigid mould 1 forming surface by die joint outline line is set, and sees shown in the vestige 6 of Fig. 4 die joint on goods.
Embodiment 4: make paper pulp high-pressure molding shell structure pallet, initial pulp density is 1% left and right, sees Fig. 5, encloses frame 3 internal orifices and made pallet equal and opposite in direction, and the patrix of formation mould is rigid mould 1, and counterdie is flexible die 2; The molded surface of whole flexible die 2 is except edge, and the flexible pocket 21 of being made by 3 to 5mm thick elastomeric materials is completely coated, and flexible pocket 21 is the core rod 22 of rigidity below, and the two is installed on flexible die holder 23, and initial flexibility capsule 21 is close on the core rod 22 of rigidity; Water in pressing process in paper pulp is extruded through the drainage groove on rigid mould 1 surface, paper fiber is along the surface uniform lamination of rigid mould 1, when the distance of rigid mould 1 and flexible die 2 is 5 to 9 times of institute's moulded products wall thickness, relative motion between the two stops, by the external world, started in flexible pocket 21, to fill pressure fluid (fluid passage does not draw) by core rod 22, flexible pocket 21 is expanded, and moisture content is higher towards periphery paper fiber lamination is exerted pressure, until the moisture in paper fiber lamination is reduced to (absolute water content) below 46%, the fibrolaminar thickness of paper is down to 3 to 5mm; And then the residual moisture in rigid mould 1 drainage groove is used after compressed air emptying, the liquid being filled with in flexible pocket 21 is drained, and flexible pocket 21 returns to original form; Rigid mould 1 with enclose frame 3 separated after, push to connect and coil to rigid mould 1 below, import compressed air the wet base of the shell structure pallet of forming blown off to connecing on dish.
Claims (8)
1. the patent of invention technology that the application patent No. is ZL201010542001.0, paper pulp is being pressed into shell structure goods in enclosing 3 formula formation moulds that frame, upper die and lower die form, it is characterized in that: described pulp density is 0.3% to 3% and (is defined as: in every 100 cubic centimetres of paper pulp containing 0.3 to 3 gram of absolute dried paper pulp, lower same), ultimate pressure is greater than 3Mpa, and described shell structure products thickness is that 1 to 6 millimeter, density are 0.7 to 1.3 gram/cc.
2. by shell structure goods claimed in claim 1 and manufacturing technology, it is characterized in that: formation mould enclose the floor projection profile that frame internal orifice is greater than institute's moulded products, under limiting case with the floor projection contour convergence of institute's moulded products; When product weight one timing, initial pulp density and the upper and lower mould relative motion range of the size of enclosing frame area that internal orifice encloses in technological parameter determines, encloses frame area >=product weight that internal orifice encloses/(upper and lower mould relative motion range * initial pulp density) that is:.
3. by shell structure goods claimed in claim 2 and manufacturing technology, it is characterized in that: the counterdie of formation mould is flexible die, patrix is rigid mould.Structure and the operation principle of flexible die are as follows: the flexible pocket that the molded surface of whole flexible die is made by 1 to 5mm thick elastomeric material is coated, it below flexible pocket, is the core rod of the rigidity similar to article shape, the two is installed on flexible die holder, initial flexibility capsule is close on the core rod of rigidity, water in pressing process in paper pulp is extruded through the drainage groove on rigid mould surface, paper fiber is along the surface uniform lamination of rigid mould, when the distance of rigid mould and flexible die is 5 to 20 times of institute's moulded products design wall thickness, relative motion between the two stops, by the external world, started in flexible pocket, to fill pressure fluid by core rod, flexible pocket is expanded, and moisture content is higher towards periphery paper fiber lamination is exerted pressure, until the moisture in paper fiber lamination is reduced to (absolute water content) below 50%, the fibrolaminar thickness of paper is down to required size, and then the residual moisture in rigid mould drainage groove is used after vacuum or compressed air emptying, the fluid being filled with in flexible pocket is drained, and flexible pocket returns to original form.
4. by shell structure goods claimed in claim 3 and manufacturing technology, it is characterized in that: for the larger endless shaper article of internal-and external diameter ratio, described flexible die (being comprised of flexible pocket, core rod and flexible die holder) is also corresponding loop configuration, and be enclosed within all the time to movable sealing there is cross section similar to endless shaper article, on solid or hollow cylinder, cylinder with enclose frame and be connected below flexible die, rigid mould is when enclosing frame and fasten, and the upper end of cylinder contacts with rigid mould just.
5. by shell structure goods and manufacturing technology described in claim 3 or 4, it is characterized in that: structure and the operation principle of rigid mould are as follows: the drainage groove of rigid mould molded surface leads to the drainage channel above the drainage channel enclosing on frame and/or on rigidity die body, molded surface is coated with the silk screen that edge extends to drainage groove end, when enclosing the internal orifice of frame and be greater than the floor projection profile of molded surface, on the silk screen at the difference place of the two area, being stamped outer surface is matched in clearance with the internal orifice that encloses frame, the pressure network plate that interior contoured surface is identical with the floor projection profile of molded surface, pressure network plate is also the upper limit plate of relative motion between rigid mould and flexible die.
6. by shell structure goods claimed in claim 5 and manufacturing technology, it is characterized in that: rigid mould is made two lobe moulds, dynamic model lobe is connected with cover half lobe by translating device; Initially, translating device pushes away (drawing) by dynamic model lobe and becomes a rigidity die cavity to cover half lobe and with cover half lobe strong bonded; Process rigid mould and flexible die relative motion water squeezing and flexible die fill the forming process of pressure fluid water squeezing, when rigid mould with enclose frame separated after, when importing compressed air makes the wet base of goods separated with rigid mould, use translating device to make rapidly dynamic model lobe separated with cover half lobe.The requirement that the die joint of two lobe formula rigid mould overlaps along translating device direction of motion contour projection with rigid mould forming surface by die joint outline line is set.
7. by shell structure goods claimed in claim 6 and manufacturing technology, it is characterized in that: the wet base after profiled piece moulding can adopt the way of drying in dryer, also can adopt at sectional die inner drying and shape.When forcing press is while being vertical, sectional die adopts wedge structure that pressure at right angle is converted to horizontal pressure force, from thermocompression forming initially to finishing, each mould lobe horizontal direction displacement is 0 to 10 millimeter.
8. by shell structure goods claimed in claim 2 and manufacturing technology, it is characterized in that: for as positive square ring and dihedral ring one class mould pressing piece, adopt the punch-die of rigidity to carry out moulding and Re Ding.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210252812.6A CN103541280A (en) | 2012-07-14 | 2012-07-14 | Manufacturing method and device of transformer molding insulating components |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210252812.6A CN103541280A (en) | 2012-07-14 | 2012-07-14 | Manufacturing method and device of transformer molding insulating components |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106988161A (en) * | 2017-05-08 | 2017-07-28 | 东莞市昆保达纸塑包装制品有限公司 | A kind of swollen type preparation method of paper mould wet pressing rubber and the swollen type device of rubber |
| CN107443862A (en) * | 2017-08-30 | 2017-12-08 | 深圳市汉匠自动化科技有限公司 | 3D film sticking equipments and 3D method for adhering film |
| CN108505400A (en) * | 2017-02-25 | 2018-09-07 | 郎旗 | A kind of fiber wet process forming method and a kind of heat-insulated tile structure of sky and space plane |
| CN112411264A (en) * | 2020-11-24 | 2021-02-26 | 天津茂创科技发展有限公司 | Shaping device for molded fiber hollow structure product and preparation method thereof |
-
2012
- 2012-07-14 CN CN201210252812.6A patent/CN103541280A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108505400A (en) * | 2017-02-25 | 2018-09-07 | 郎旗 | A kind of fiber wet process forming method and a kind of heat-insulated tile structure of sky and space plane |
| CN108505400B (en) * | 2017-02-25 | 2022-04-12 | 郎旗 | Fiber wet forming method and aerospace plane heat insulation tile structure |
| CN106988161A (en) * | 2017-05-08 | 2017-07-28 | 东莞市昆保达纸塑包装制品有限公司 | A kind of swollen type preparation method of paper mould wet pressing rubber and the swollen type device of rubber |
| CN106988161B (en) * | 2017-05-08 | 2019-03-19 | 东莞市昆保达纸塑包装制品有限公司 | A kind of paper mould wet pressing rubber is swollen type preparation method and the swollen type device of rubber |
| CN107443862A (en) * | 2017-08-30 | 2017-12-08 | 深圳市汉匠自动化科技有限公司 | 3D film sticking equipments and 3D method for adhering film |
| CN112411264A (en) * | 2020-11-24 | 2021-02-26 | 天津茂创科技发展有限公司 | Shaping device for molded fiber hollow structure product and preparation method thereof |
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Application publication date: 20140129 |