CN102294477A - Permanent ferrite magnetic shoe wet pressing molding mould - Google Patents
Permanent ferrite magnetic shoe wet pressing molding mould Download PDFInfo
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- CN102294477A CN102294477A CN2011102478122A CN201110247812A CN102294477A CN 102294477 A CN102294477 A CN 102294477A CN 2011102478122 A CN2011102478122 A CN 2011102478122A CN 201110247812 A CN201110247812 A CN 201110247812A CN 102294477 A CN102294477 A CN 102294477A
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Abstract
The invention discloses a permanent ferrite magnetic shoe wet pressing molding mould, which adopts a material filling plate to replace a material storage chamber for feed and simultaneously can ensure the material filling amount of each cavity to be equal. The mould is divided into an upper die, a middle die and a lower die, wherein the middle die comprises a support plate, a cavity plate positioned on the support plate, and lower convex dies respectively in sliding fit with each cavity hole on the cavity plate, the support plate is connected with the cavity plate through the material filling plate, the lower end of each lower convex die respectively penetrates through corresponding guide holes on the material filling plate and the support plate to be connected with the lower die, the material filling plate is provided with at least one feed port, the feed port is communicated with a plurality of material filling pore canals arranged in the material filling plate, the pore canals are respectively communicated with corresponding feed pore canals in the cavity plate, the tail end of each feed pore canal in the cavity plate respectively extends to side walls of corresponding cavity holes, material outlets are formed on the side walls, and before pressing, the distance between the material outlet and the top end of the lower convex die is 0.3-0.7 time the thickness of a molded blank.
Description
Technical field
The application relates to permanent ferrite magnetic tile Wet-pressing molding mould, is specifically related to the feed system of this mould.
Background technology
Granted publication number for the utility model patent of CN200963678Y discloses a kind of permanent ferrite magnetic tile press Wet-pressing molding mould (calling reference paper in the following text), its structure is: a, mould are divided into patrix, middle mould and three parts of counterdie; B, described in mould comprise gripper shoe (be arranged in the accompanying drawing 1 of reference paper " storage compartment 4 " below plate), be arranged on the gripper shoe cavity plate (reference paper is referred to as " mould 3 ") and respectively with cavity plate on the lower punch that is slidingly matched of various lumen pore; The lower end of c, these lower punches is connected with counterdie (having the part of " material feeding inlet 10 " in the accompanying drawing 1 of reference paper) respectively; D, between gripper shoe and cavity plate, be provided with the storage compartment; Have many charging ducts (being referred to as " material feeding blind hole " in the reference paper) in e, the cavity plate, the top in each charging duct and storage compartment's conducting, end extends to the sidewall in corresponding die cavity hole respectively and form discharging opening (being referred to as " horizontal mounting hole " in the reference paper) on sidewall; The aperture lower limb of discharging opening flushes with lower punch top (being referred to as " arc summit " in the reference paper) before f, the compacting.
In addition, also point out in the 1st page the 5th section the 5th～10 row of the specification of reference paper, when mould adopts runner plate (being the material feeding plate) material feeding, cause each die cavity shot not wait easily and then influence blank quality.Simultaneously, record in the 4th section the 1st～3 row of its Instructions Page 2, adopt the improved technical scheme of reference paper after because the pressure in the storage compartment is certain, so the flow velocity that slurry enters each material feeding blind hole equates, the shot that finally can guarantee to inject each die cavity is equal.This shows that in fact reference paper has provided and establish the instruction that the storage compartment guarantees that the shot of each die cavity equates in mould, therefore, reference paper obviously is to oppose to carry out material feeding by the material feeding plate.But, in mould, establish the storage compartment and not only can increase the mould volume, but also can face the sealing problem of storage compartment, and these problems all can be overcome by the material feeding of material feeding plate.
Summary of the invention
The present invention aims to provide a kind of employing material feeding plate and replaces storage compartment's charging, can guarantee the permanent ferrite magnetic tile Wet-pressing molding mould of each die cavity shot equalization simultaneously again.
For this reason, this mould is divided into patrix, middle mould and three parts of counterdie, mould comprises gripper shoe in described, be positioned on the gripper shoe cavity plate and respectively with cavity plate on the lower punch that is slidingly matched of various lumen pore, be connected by the material feeding plate between this gripper shoe and the cavity plate, the lower end of each lower punch passes respectively that corresponding pilot hole is connected with counterdie on material feeding plate and the gripper shoe, this material feeding plate is provided with at least one charging aperture, many the material feeding duct conductings of offering in described charging aperture and the material feeding plate, these material feeding ducts again respectively with cavity plate in corresponding charging duct conducting, the end in each the charging duct in the cavity plate extends to the sidewall in corresponding die cavity hole respectively and form discharging opening on sidewall, and the distance on described discharging opening and lower punch top equals 0.3 times to 0.7 times of blank thickness after the moulding before the compacting.
Record according to the 1st section of reference paper Instructions Page 3, reference paper advocates that the aperture lower limb of the preceding discharging opening of compacting flushes with the lower punch top, the rapid shutoff discharging opening of lower punch energy when its purpose is to suppress refunds the discharging opening slurry to prevent that the die cavity internal pressure from increasing in die cavity.And the present invention advocates to make discharging opening and lower punch top separated by a distance, and this distance equals 0.3 times to 0.7 times of blank thickness after the moulding, thus the time of lower punch shutoff discharging opening when prolonging compacting; In this time, thereby being squeezed back discharging opening by part, the slurry in the bigger die cavity of pressure influences slurry pressure in charging duct and the material feeding duct, part slurry in the duct is flowed in the less die cavity of pressure, finally impel the approaching equilibrium of slurry pressure in each die cavity, just guaranteed that also the shot of each die cavity equates.
On the basis of technique scheme, the present invention also improves the structure of lower punch, be specially: the top of lower punch is by strong magnetic conduction matrix and the non-magnetic conductive tile shape mold insert be combined into that is covered in strong magnetic conduction body upper surface, this non-magnetic conductive tile shape mold insert is then by watt arc portion and constituted through the stage portion that transition arcs extends to form from watt arc portion two ends respectively, wherein, the radius of the extrados of described watt of arc portion equate with the radius of its intrados and the thickness of this watt arc portion by the centre to two ends attenuation gradually.
Because the end face of lower punch upwards arches upward, it is inhomogeneous to cause the permanent ferrite magnetic tile product to magnetize, and magnetizing to be orientated and be better than both sides in the top at the position of promptly arching upward, influences properties of product.For this reason, in the middle of in the above-mentioned corrective measure Thickness Design of watt arc portion of non-magnetic conductive tile shape mold insert being served as reasons to two ends gradually the form of attenuation (make W1＞W2, W1 is the center radial thickness, W2 of watt arc portion two ends radial thickness for watt arc portion), can weaken the magnetic field intensity on blank top.Particularly, when watt radius of the extrados of arc portion equates with the radius of its intrados, watt arc portion is continuous variation along extrados or intrados thickness radially everywhere, and the variation tendency of its thickness is just opposite with watt variation tendency of arc portion extrados, can guarantee fully in the blank that radial magnetic field everywhere is identical by force.
In addition, the present invention also advises forming the interior fillet surface that extends along this non-magnetic conductive tile shape mold insert dual-side respectively after processing on the upper surface of described non-magnetic conductive tile shape mold insert.Like this, just can avoid follow-up chamfer machining by the chamfering of mould one-shot forming blank inside edge.For the upper surface at non-magnetic conductive tile shape mold insert processes interior fillet surface, can realize by multiple modes such as spark machined, moulding mill or numerical control millings.
Eventually the above, permanent ferrite magnetic tile Wet-pressing molding mould of the present invention has used the material feeding plate to replace the storage compartment, has dwindled the mould volume, has simplified the structure of mould, avoid the sealing problem of storage compartment, and the shot that has yet solved simultaneously issuable each die cavity of material feeding plate material feeding does not wait problem; And by improved lower punch, can guarantee fully in the blank that radial magnetic field everywhere is identical by force, improve product quality, and simplified the following process of blank.
Description of drawings
Fig. 1 is the overall structure schematic diagram of mould of the present invention.
Fig. 2 concerns schematic diagram for the three-dimensional position of cope match-plate pattern, cavity plate, material feeding plate and lower punch in the mould of the present invention.
Fig. 3 is the material feeding route map of mould of the present invention.
Fig. 4 is the fiting relation figure of preceding lower punch of mould compacting of the present invention and cavity plate.
Fig. 5 is the half sectional view of lower punch in the mould of the present invention.
Fig. 6 is that the A of Fig. 5 is to view.
Dotted arrow among Fig. 2 is represented the flow direction of slurry.
Solid line among Fig. 3 is represented the path of slurry in the material feeding plate, and dotted line is represented the path of slurry in cavity plate.
Blank after dotted line among Fig. 4 is represented to suppress.
Be labeled as among the figure: patrix 1, cope match-plate pattern 1a, middle mould 2, cavity plate 2a, material feeding plate 2b, gripper shoe 2c, lower punch 2d, material feeding duct 201, charging aperture 202, charging duct 203, discharging opening 204, die cavity hole 205, non-magnetic conductive tile shape mold insert 206, strong magnetic conduction matrix 207, interior fillet surface 208, watt arc portion 209, stage portion 210, counterdie 3.
The specific embodiment
The present invention will be further described below in conjunction with drawings and Examples.
Shown in Fig. 1～4, mould is divided into patrix 1, middle mould 2 and 3 three parts of counterdie, and wherein: patrix 1 comprises cope match-plate pattern 1a, and the upper surface of the cavity plate 2a in the lower surface of cope match-plate pattern 1a and the middle mould 2 is fitted to each other; In mould 2 the material feeding plate 2b and the cavity plate 2a that comprise gripper shoe 2c, install from the bottom to top at gripper shoe 2c upper surface, and respectively with cavity plate 2a on the lower punch 2d that is slidingly matched of various lumen pore 205, the lower end of each lower punch 2d is passed material feeding plate 2b respectively and is gone up corresponding pilot hole with gripper shoe 2c and be connected with counterdie 3; The concrete structure of counterdie 3 is determined according to the motion mode of mould: if counterdie 3 maintains static, patrix 1 is moved downward with gripper shoe 2c, material feeding plate 2b and the relative counterdie 3 of cavity plate 2a in the middle mould 2, at this moment counterdie 3 only plays the fixed support effect to each lower punch 2d, and is simple relatively on the structure; If patrix 1 maintains static with gripper shoe 2c, material feeding plate 2b and the relative counterdie 3 of cavity plate 2a in the middle mould 2, counterdie 3 is moved upward relatively, at this moment, counterdie 3 should have a liftable part that connects each lower punch 2d and (be general knowledge known in this field, concrete structure repeats no more), relative complex on the structure; In above-mentioned mould, material feeding plate 2b is provided with at least one charging aperture 202, many material feeding duct 201 conductings of offering in described charging aperture 202 and the material feeding plate 2b, these material feeding ducts 201 again respectively with cavity plate 2a in corresponding charging duct 203 conductings, the end in each the charging duct 203 among the cavity plate 2a extends to the sidewall in corresponding die cavity hole 205 respectively and form discharging opening 204 on sidewall, and the distance D on described discharging opening 204 and lower punch 2d top equals 0.3 times to 0.7 times of blank thickness T after the moulding before the compacting.
In addition, shown in Fig. 5～6, lower punch 2d in the above-mentioned mould has also carried out following improvement: the top of lower punch 2d is by strong magnetic conduction matrix 207 and non-magnetic conductive tile shape mold insert 206 be combined intos that are covered in strong magnetic conduction matrix 207 upper surfaces, 206 of this non-magnetic conductive tile shape mold inserts are by watt arc portion 209 and constituted through the stage portion 210 that transition arcs extends to form from watt arc portion 209 two ends respectively, wherein, the radius R 1 of the extrados of described watt of arc portion 209 equate with the radius R 2 of its intrados and the thickness of this watt arc portion 209 by the centre to two ends attenuation gradually.As shown in Figure 6, when watt radius of the extrados of arc portion 209 equates with the radius of its intrados, watt arc portion 209 is continuous variation along extrados or intrados thickness radially everywhere, and the variation tendency of its thickness is just opposite with watt variation tendency of arc portion extrados, can guarantee fully in the blank that radial magnetic field everywhere is identical by force.In addition, the upper surface of described non-magnetic conductive tile shape mold insert 206 also forms the interior fillet surface 208 that extends along these non-magnetic conductive tile shape mold insert 206 dual-sides respectively through the processing back, with the chamfering by mould one-shot forming blank inside edge, avoids follow-up chamfer machining.
Shown in Fig. 2～4: 9 die cavity holes 205 that have rectangular array among the cavity plate 2a, only be provided with a charging aperture 202 on the material feeding plate 2b, among this charging aperture 202 and the material feeding plate 2b two material feeding duct 201 conductings parallel to each other and that extend along material feeding plate 2b width, these two along being connected with four upwardly extending material feeding ducts 201 again respectively on the material feeding duct 201 that material feeding plate 2b width extends, corresponding with material feeding plate 2b upper surface again material feeding duct 201 conductings along the extension of material feeding plate 2b length direction of offering of the end in each upwardly extending material feeding duct 201; The both sides that are positioned at various lumen pore 205 among the cavity plate 2a have from upwardly extending charging duct, cavity plate 2a bottom surface 203, the top in each charging duct 203 and above-mentioned material feeding duct 201 conductings that are positioned at material feeding plate 2b upper surface and extend along material feeding plate 2b length direction, terminal extend and form discharging opening 204 on its sidewall to the sidewall in corresponding die cavity hole 205 through turning round after, the distance D on each discharging opening 204 and lower punch 2d top equals 0.3 times of blank thickness T after the moulding before the compacting.After tested, the product density of 9 blanks once suppressing by above-mentioned mould is basic identical, and the shot of each die cavity was impartial substantially when material feeding was described.
On the basis of embodiment 1, the distance D on each discharging opening 204 before the compacting and lower punch 2d top is set at 0.7 times of blank thickness T after the moulding.The shot equalization of each die cavity when carrying out the test shows material feeding by 9 blanks that this mould is once suppressed, but because charging is bigger than the ratio of blank thickness (the die cavity charging thickness with), the averag density of 9 blanks is near the upper limit.
Claims (3)
1. permanent ferrite magnetic tile Wet-pressing molding mould, this mould is divided into patrix (1), middle mould (2) and (3) three parts of counterdie, mould (2) comprises gripper shoe (2c) in described, be positioned on the gripper shoe (2c) cavity plate (2a) and respectively with cavity plate (2a) on the lower punch (2d) that is slidingly matched of various lumen pore (205), it is characterized in that: be connected by material feeding plate (2b) between this gripper shoe (2c) and the cavity plate (2a), the lower end of each lower punch (2d) is passed material feeding plate (2b) respectively and is connected with counterdie (3) with the last corresponding pilot hole of gripper shoe (2c), this material feeding plate (2b) is provided with at least one charging aperture (202), many material feeding ducts (201) conducting of offering in described charging aperture (202) and the material feeding plate (2b), these material feeding ducts (201) again respectively with cavity plate (2a) in corresponding charging duct (203) conducting, the end in each the charging duct (203) in the cavity plate (2a) extends to the sidewall in corresponding die cavity hole (205) respectively and form discharging opening (204) on sidewall, and the distance (D) on described discharging opening (204) and lower punch (2d) top equals 0.3 times to 0.7 times of blank thickness (T) after the moulding before the compacting.
2. permanent ferrite magnetic tile Wet-pressing molding mould as claimed in claim 1, it is characterized in that: the top of described lower punch (2d) is by strong magnetic conduction matrix (207) and is covered in non-magnetic conductive tile shape mold insert (206) be combined into of strong magnetic conduction matrix (207) upper surface, this non-magnetic conductive tile shape mold insert (206) is then by watt arc portion (209) and constituted from watt stage portion (210) that arc portion (209) two ends extend to form through transition arcs respectively, wherein, the radius (R1) of the extrados of described watt of arc portion (209) equate with the radius (R2) of its intrados and the thickness of this watt arc portion (209) by the centre to two ends attenuation gradually.
3. permanent ferrite magnetic tile Wet-pressing molding mould as claimed in claim 2 is characterized in that: the upper surface of described non-magnetic conductive tile shape mold insert (206) forms the interior fillet surface (208) that extends along this non-magnetic conductive tile shape mold insert (206) dual-side respectively after processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110247812 CN102294477B (en) | 2011-08-26 | 2011-08-26 | Permanent ferrite magnetic shoe wet pressing molding mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110247812 CN102294477B (en) | 2011-08-26 | 2011-08-26 | Permanent ferrite magnetic shoe wet pressing molding mould |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102294477A true CN102294477A (en) | 2011-12-28 |
| CN102294477B CN102294477B (en) | 2013-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110247812 Active CN102294477B (en) | 2011-08-26 | 2011-08-26 | Permanent ferrite magnetic shoe wet pressing molding mould |
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| Country | Link |
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| CN (1) | CN102294477B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019095921A1 (en) * | 2017-11-14 | 2019-05-23 | 北京科技大学 | Method for preparing high-orientation-degree sintered neodymium-iron-boron permanent magnet material by means of wet-press forming |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6154601A (en) * | 1984-08-27 | 1986-03-18 | Tdk Corp | Oxide permanent magnet and manufacture thereof |
| JPH05217735A (en) * | 1992-01-31 | 1993-08-27 | Tdk Corp | Circular ferrite magnet, its production and wet type molding apparatus |
| CN200963678Y (en) * | 2006-10-16 | 2007-10-24 | 安徽龙磁科技有限责任公司 | Automatic charging and forming die for permanent magnetic ferrite wet pressing magnetic shoe |
| CN201329419Y (en) * | 2008-12-18 | 2009-10-21 | 安徽龙磁科技股份有限公司 | Lower punch of automatic feeding forming die of magnetic shoe |
| CN201824453U (en) * | 2010-09-19 | 2011-05-11 | 安徽金寨将军磁业有限公司 | Female die of wet pressing magnetic field forming mold of permanent-magnet ferrite magnetic shoe |
| CN202263934U (en) * | 2011-08-26 | 2012-06-06 | 四川川西磁业有限责任公司 | Permanent magnet ferrite magnetic shoe wet-pressing forming die |
-
2011
- 2011-08-26 CN CN 201110247812 patent/CN102294477B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6154601A (en) * | 1984-08-27 | 1986-03-18 | Tdk Corp | Oxide permanent magnet and manufacture thereof |
| JPH05217735A (en) * | 1992-01-31 | 1993-08-27 | Tdk Corp | Circular ferrite magnet, its production and wet type molding apparatus |
| CN200963678Y (en) * | 2006-10-16 | 2007-10-24 | 安徽龙磁科技有限责任公司 | Automatic charging and forming die for permanent magnetic ferrite wet pressing magnetic shoe |
| CN201329419Y (en) * | 2008-12-18 | 2009-10-21 | 安徽龙磁科技股份有限公司 | Lower punch of automatic feeding forming die of magnetic shoe |
| CN201824453U (en) * | 2010-09-19 | 2011-05-11 | 安徽金寨将军磁业有限公司 | Female die of wet pressing magnetic field forming mold of permanent-magnet ferrite magnetic shoe |
| CN202263934U (en) * | 2011-08-26 | 2012-06-06 | 四川川西磁业有限责任公司 | Permanent magnet ferrite magnetic shoe wet-pressing forming die |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019095921A1 (en) * | 2017-11-14 | 2019-05-23 | 北京科技大学 | Method for preparing high-orientation-degree sintered neodymium-iron-boron permanent magnet material by means of wet-press forming |
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| Publication number | Publication date |
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| CN102294477B (en) | 2013-06-19 |
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