CN102294477B - Permanent ferrite magnetic shoe wet pressing molding mould - Google Patents
Permanent ferrite magnetic shoe wet pressing molding mould Download PDFInfo
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- CN102294477B CN102294477B CN 201110247812 CN201110247812A CN102294477B CN 102294477 B CN102294477 B CN 102294477B CN 201110247812 CN201110247812 CN 201110247812 CN 201110247812 A CN201110247812 A CN 201110247812A CN 102294477 B CN102294477 B CN 102294477B
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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 shoe 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 middle mould comprise gripper shoe (be arranged in the accompanying drawing 1 of reference paper " storage compartment 4 " below plate), be arranged on gripper shoe cavity plate (reference paper is referred to as " mould 3 ") and respectively with cavity plate on the lower punch that is slidably matched of each die cavity holes; The lower end of c, these lower punches is connected with counterdie (having the part of " material feeding entrance 10 " in the accompanying drawing 1 of reference paper) respectively; D, be provided with the storage compartment between gripper shoe and cavity plate; Have many charging ducts (being referred to as " material feeding blind hole " in reference paper) in e, cavity plate, top and storage compartment's conducting in each charging duct, end extends to respectively the sidewall of corresponding die cavity holes and form discharging opening (being referred to as " horizontal mounting hole " in reference paper) on sidewall; Before f, compacting, the aperture lower limb of discharging opening flushes with lower punch top (being referred to as " arc summit " in reference paper).
In addition, also point out in the 1st page of the 5th section the 5th～10 row of the specification of reference paper, easily cause each die cavity shot not wait and then affect blank quality when mould adopts runner plate (being the material feeding plate) material feeding.Simultaneously, put down in writing in the 4th section the 1st～3 row of its Instructions Page 2, after adopting the improved technical scheme of reference paper, because the pressure in the storage compartment is certain, so the flow velocity that slurry enters each material feeding blind hole equates, can guarantee that finally the shot of injecting each die cavity equates.This shows, in fact reference paper has provided and established the instruction that the storage compartment guarantees that the shot of each die cavity equates in mould, and therefore, reference paper is obviously to oppose to carry out material feeding by the material feeding plate.But, establish the storage compartment and not only can increase the mould volume in mould, 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 again the permanent ferrite magnetic shoe wet pressing molding mould of each die cavity shot equalization simultaneously.
for this reason, this mould is divided into patrix, three parts of middle mould and counterdie, described middle mould comprises gripper shoe, be positioned on gripper shoe cavity plate and respectively with cavity plate on the lower punch that is slidably matched of each die cavity holes, be connected by the material feeding plate between this gripper shoe and cavity plate, the lower end of each lower punch is passed respectively the material feeding plate and is connected corresponding pilot hole with gripper shoe and is connected with counterdie, 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 material feeding plate, these material feedings duct again respectively with cavity plate in corresponding charging duct conducting, the end in each charging duct in cavity plate extends to respectively the sidewall of corresponding die cavity holes and form discharging opening on sidewall, the distance of suppressing front described discharging opening and lower punch top equals 0.3 times to 0.7 times of blank thickness after moulding.
Record according to the 1st section of reference paper Instructions Page 3, the aperture lower limb that reference paper is advocated discharging opening before compacting flushes with the lower punch top, the rapid shutoff discharging opening of lower punch energy when its purpose is to suppress refunds discharging opening slurry to prevent that the die cavity internal pressure from increasing in die cavity.And the present invention advocate to make discharging opening and the lower punch top separated by a distance, this distance equals 0.3 times to 0.7 times of blank thickness after moulding, thus the time of lower punch shutoff discharging opening when extending compacting; Within this time, thereby being squeezed back discharging opening by part, the slurry in the larger die cavity of pressure affects slurry pressure in charging duct and 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 to be combined into by strong magnetic conduction matrix and the non-magnetic watt of shape mold insert that is covered in strong magnetic conduction body upper surface, this non-magnetic watt of shape mold insert is by watt arc section and consisted of through the stage portion that transition arcs extends to form from watt arc section two ends respectively, wherein, the radius of the extrados of described watt of arc section equate with the radius of its intrados and the thickness of this watt arc section by centre attenuation gradually to two ends.
Because the end face of lower punch upwards arches upward, can cause the permanent ferrite magnetic tile product magnetizing inhomogeneous, the top at the position of namely the arching upward orientation that magnetizes is better than both sides, affects properties of product.For this reason, in the middle of in above-mentioned corrective measure, the Thickness Design of watt arc section of non-magnetic watt of shape mold insert being served as reasons to two ends gradually the form of attenuation (make W1＞W2, W1 is that the center radial thickness, W2 of watt arc section are the two ends radial thickness of watt arc section), can weaken the magnetic field intensity on blank top.Particularly, when the radius of the extrados of watt arc section equates with the radius of its intrados, watt arc section is continuous variation along extrados or intrados thickness radially everywhere, and the variation tendency of its thickness just variation tendency with watt arc section extrados is opposite, can guarantee fully in 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 watt of shape mold insert dual-side respectively on the upper surface of described non-magnetic watt of shape mold insert after processing.Like this, just can by the chamfering of mould one-shot forming blank inside edge, avoid follow-up chamfer machining.For the upper surface at non-magnetic watt of shape mold insert processes interior fillet surface, can pass through the various ways such as spark machined, moulding mill or numerical control milling and realize.
Eventually the above, permanent ferrite magnetic shoe 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 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 is that the three-dimensional position of cope match-plate pattern in mould of the present invention, cavity plate, material feeding plate and lower punch concerns schematic diagram.
Fig. 3 is the material feeding route map of mould of the present invention.
Fig. 4 is the fiting relation figure of the front lower punch of mould compacting of the present invention and cavity plate.
Fig. 5 is the half sectional view of lower punch in mould of the present invention.
Fig. 6 is that the A of Fig. 5 is to view.
Dotted arrow in Fig. 2 represents the flow direction of slurry.
Solid line in Fig. 3 represents that the path of slurry in the material feeding plate, dotted line represent the path of slurry in cavity plate.
Blank after dotted line in Fig. 4 represents to suppress.
Be labeled as in 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 holes 205, non-magnetic watt of shape mold insert 206, strong magnetic conduction matrix 207, interior fillet surface 208, watt arc section 209, stage portion 210, counterdie 3.
The specific embodiment
The present invention will be further described below in conjunction with drawings and Examples.
As 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 middle mould 2 is fitted to each other; Material feeding plate 2b and cavity plate 2a that middle mould 2 comprises gripper shoe 2c, installs from the bottom to top at gripper shoe 2c upper surface, and respectively with cavity plate 2a on the lower punch 2d that is slidably matched of each die cavity holes 205, the lower end of each lower punch 2d is passed respectively material feeding plate 2b and is connected corresponding pilot hole with gripper shoe 2c and is 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 middle mould 2, at this moment counterdie 3 only plays the fixed support effect to each lower punch 2d, and is relatively simple on structure; If patrix 1 maintains static with gripper shoe 2c, material feeding plate 2b and the relative counterdie 3 of cavity plate 2a in 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 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 material feeding plate 2b, these material feedings duct 201 again respectively with cavity plate 2a in corresponding charging duct 203 conductings, the end in each charging duct 203 in cavity plate 2a extends to respectively the sidewall of corresponding die cavity holes 205 and form discharging opening 204 on sidewall, and the distance B of suppress front described discharging opening 204 and lower punch 2d top equals 0.3 times to 0.7 times of blank thickness T after moulding.
In addition, as shown in Fig. 5～6, lower punch 2d in above-mentioned mould has also carried out following improvement: the top of lower punch 2d is to be combined into by strong magnetic conduction matrix 207 and the non-magnetic watt of shape mold insert 206 that is covered in strong magnetic conduction matrix 207 upper surfaces, 206 of this non-magnetic watt of shape mold inserts are by watt arc section 209 and consisted of through the stage portion 210 that transition arcs extends to form from watt arc section 209 two ends respectively, wherein, the radius R 1 of the extrados of described watt of arc section 209 equate with the radius R 2 of its intrados and the thickness of this watt arc section 209 by centre attenuation gradually to two ends.As shown in Figure 6, when the radius of the extrados of watt arc section 209 equates with the radius of its intrados, watt arc section 209 is continuous variation along extrados or intrados thickness radially everywhere, and the variation tendency of its thickness just variation tendency with watt arc section extrados is opposite, can guarantee fully in blank that radial magnetic field everywhere is identical by force.In addition, the upper surface of described non-magnetic watt of shape mold insert 206 also through forming the interior fillet surface 208 that extends along these non-magnetic watt of shape mold insert 206 dual-sides respectively after processing, with the chamfering by mould one-shot forming blank inside edge, is avoided follow-up chamfer machining.
Embodiment 1
As shown in Fig. 2～4: 9 die cavity holes 205 that have rectangular array in cavity plate 2a, only be provided with a charging aperture 202 on material feeding plate 2b, parallel to each other and material feeding duct 201 conductings of extending along material feeding plate 2b width of in this charging aperture 202 and material feeding plate 2b two, be connected with respectively again four upwardly extending material feeding ducts 201 on these two the material feeding ducts of extending along material feeding plate 2b width 201, the end in each upwardly extending material feeding duct 201 is material feeding duct 201 conductings of along material feeding plate 2b length direction extending of offering corresponding to material feeding plate 2b upper surface again; The both sides that are positioned at various lumen pore 205 in 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, end extends and form discharging opening 204 on its sidewall through the sidewall of the backward corresponding die cavity holes 205 that turns round, and before compacting, the distance B on each discharging opening 204 and lower punch 2d top equals 0.3 times of blank thickness T after moulding.After tested, the product density of 9 blanks once suppressing by above-mentioned mould is basic identical, and when material feeding is described, the shot of each die cavity is substantially impartial.
On the basis of embodiment 1, the distance B on each discharging opening 204 before compacting and lower punch 2d top is set as 0.7 times of blank thickness T after moulding.The shot of testing each die cavity when showing material feeding by 9 blanks that this mould is once suppressed is impartial, but because charging is larger 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 shoe wet pressing molding mould, this mould is divided into patrix (1), (3) three parts of middle mould (2) and counterdie, described middle mould (2) comprises gripper shoe (2c), be positioned on gripper shoe (2c) cavity plate (2a) and respectively with cavity plate (2a) on the lower punch (2d) that is slidably matched of each die cavity holes (205), it is characterized in that: be connected by material feeding plate (2b) between this gripper shoe (2c) and cavity plate (2a), the lower end of each lower punch (2d) is passed respectively material feeding plate (2b) and is connected 2c with gripper shoe) upper corresponding pilot hole is connected with counterdie (3), 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 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 charging duct (203) in cavity plate (2a) extends to respectively the sidewall of corresponding die cavity holes (205) and form discharging opening (204) on sidewall, the distance (D) of suppressing front described discharging opening (204) and lower punch (2d) top equals 0.3 times to 0.7 times of blank thickness (T) after moulding.
2. permanent ferrite magnetic shoe wet pressing molding mould as claimed in claim 1, it is characterized in that: the top of described lower punch (2d) is to be combined into by strong magnetic conduction matrix (207) and the non-magnetic watt of shape mold insert (206) that be covered in strong magnetic conduction matrix (207) upper surface, this non-magnetic watt of shape mold insert (206) is by watt arc section (209) and consisted of from watt stage portion (210) that arc section (209) two ends extend to form through transition arcs respectively, wherein, the radius (R1) of the extrados of described watt of arc section (209) equate with the radius (R2) of its intrados and the thickness of this watt arc section (209) by centre attenuation gradually to two ends.
3. permanent ferrite magnetic shoe wet pressing molding mould as claimed in claim 2, is characterized in that: the upper surface of described non-magnetic watt of shape mold insert (206) the interior fillet surface (208) that formation is extended along this non-magnetic watt of 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 |
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| Publication Number | Publication Date |
|---|---|
| CN102294477A CN102294477A (en) | 2011-12-28 |
| CN102294477B true CN102294477B (en) | 2013-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110247812 Active CN102294477B (en) | 2011-08-26 | 2011-08-26 | Permanent ferrite magnetic shoe wet pressing molding mould |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107799254A (en) * | 2017-11-14 | 2018-03-13 | 北京科技大学 | A kind of method that wet pressing shaping prepares high-orientation knot Nd-Fe-B permanent magnet material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0612727B2 (en) * | 1984-08-27 | 1994-02-16 | ティーディーケイ株式会社 | Manufacturing method of oxide permanent magnet |
| JP2551545B2 (en) * | 1992-01-31 | 1996-11-06 | ティーディーケイ株式会社 | Arc-shaped ferrite magnet, method of manufacturing the same, and wet molding apparatus |
-
2011
- 2011-08-26 CN CN 201110247812 patent/CN102294477B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Non-Patent Citations (2)
| Title |
|---|
| JP昭61-54601A 1986.03.18 |
| JP特开平5-217735A 1993.08.27 |
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