CN101335128B - Method for producing magnetic steel molding product by full-automatic wet process and molding machinery thereof - Google Patents
Method for producing magnetic steel molding product by full-automatic wet process and molding machinery thereof Download PDFInfo
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- CN101335128B CN101335128B CN2007100525739A CN200710052573A CN101335128B CN 101335128 B CN101335128 B CN 101335128B CN 2007100525739 A CN2007100525739 A CN 2007100525739A CN 200710052573 A CN200710052573 A CN 200710052573A CN 101335128 B CN101335128 B CN 101335128B
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Abstract
The invention discloses a full-automatic wet method for producing magnetic steel molded products and molding equipment thereof, pertaining to the field of production methods of the magnetic steel molded products. The method of the invention comprises the steps of preparing slurry, pressing and molding a green body, sintering the green body to a rough cast and post-processing the rough cast to form a product, etc. In the steps of pressing and molding the green body, the equipment using the method of the invention is adopted to independently control the ascending movement and descending movement of a mold cavity so as to cause the mold cavity to do ascending movement relative to a core bar, thereby providing a feeding space; the center of the core bar is provided with a feeding hole, a feeding port at the lower part of the feeding hole is communicated with a feed bin and the slurry is fed from an opening at the top part of the feeding hole to a material containing space; after the completion of the feeding, the mold cavity is fast controlled to return to a position which is parallel to the top part of the core bar, and then pressed, after pressing, a mould is opened, an upper oil cylinder and a lower oil cylinder return in sequence. The lower oil cylinder returns and drives the mold cavity and the core bar descends to the same plane with a punch simultaneously. The green body is demolded. The full-automatic wet method of the invention greatly shortens the time of pressing and molding, reduces energy consumption, greatly improves production efficiency and reduces the labor intensity of workers.
Description
Technical field
The method and the moulding facility thereof of a kind of full-automatic wet production magnet steel moulded products of the present invention belong to the field of production of magnet steel moulded products, are specifically related to the method and the moulding facility thereof of wet production magnet steel moulded products.
Background technology
The method of wet production magnet steel moulded products comprises following processing step at present: 1, preparation slip; 2, compression moulding green compact; 3, green sintering becomes blank; 4, be processed as product behind the blank.Now be described below
One, preparation slip:
Select for use suitable ferric oxide powder and rare earth metal baking mixed, levigate is ferrite prefiring material, adopts ball mill to add water mill to the 0.8---1 micron, the good slip of mill filter to moisture content 35%--45% with filter pocket standby.
Two, compression moulding green compact:
Adopt the moulding facility with above-mentioned slurry compression moulding.As shown in Figure 4, the moulding facility comprise hydraulic press and mould and control system, mould is made up of upper and lower mould, cover plate, drift, die cavity and core bar, mold component is connected with the hydraulic press corresponding component, the control of the controlled system of operation, wherein die cavity and core bar are controlled by oil cylinder down, the upstream or downstream of die cavity and core bar are to link simultaneously, the relative motion of die cavity and core bar no up-downgoing between the two, for avoiding leaking material in the high pressure pressing process, the gap of core bar and drift, drift and die cavity adopts rubber o-ring to seal.Prior art compression moulding process can be divided into semi-automatic and full-automatic two kinds of modes of production because of the difference of its charging process:
1) hand charge: as shown 1, rise (removing) patrix, the following oil cylinder of hydraulic press upwards rises, and the die cavity, the core bar that drive mould move on to correct position simultaneously, mold and punching head is motionless, make die cavity constitute the charge space, because of patrix rises, so open type charge space is arranged, by hand raw material is inserted die cavity, the reinforced magnetic field that simultaneously raw material is imposed prescribed direction and intensity makes the raw material orientation, and the raw material orientation finishes, and the raw material that die surface is unnecessary is removed.This charging method not only efficient is low, labor strength is big, and the unnecessary raw material of die surface is difficult to remove and totally causes the mould closure not tight, under high pressure the slip in the die cavity can overflow from the not tight slit of mould closure, there is following hidden danger of quality in addition: 1. because on the hydraulic press work top, must deposit certain slip, the moisture content of slip is along with different variations can take place in environment, and slip dehydration degree varies causes, the slip that has even the caking that can dry up; 2. slip skewness in die cavity; Easily cause product to lack material when 3. removing die surface; 4. die surface does not clean up, can damage mould first, second under high pressure the interior slip of die cavity can overflow from the not tight slit of mould closure, more than all extrudate densities of compression moulding that all can cause inhomogeneous, size is inconsistent, inconsistent during sintering because of each position coefficient of expansion of product, very easily produce critical defects such as cracking and crackle.
2) auto feed: as shown in Figure 2, mould must be implemented automatic feed under closure state up and down, because as previously mentioned " die cavity and core bar are controlled by oil cylinder down; the upstream or downstream of die cavity and core bar are to link simultaneously; the relative motion of die cavity and core bar no up-downgoing between the two ", die cavity and core bar link all the time, its top is concordant all the time, be in same horizontal level, so the design of the charge door of this automatic press-moulding die is at the inwall of the suitable height of die cavity, the counterdie drift is motionless, die cavity, core bar then links and goes upward to correct position, makes charging aperture be in the low punch top, and die cavity has the charge space, it is descending to move downward drive patrix cover plate by the hydraulic press upper cylinder, with the counterdie closure.After the mould closure, it is reinforced from the die cavity charge door that hydraulic press is controlled the material feeding oil cylinder automatically, and stand-by slip stirs in agitator, keeps slip moisture content unanimity.The essential defect of these automatic compression moulding goods is that the feeding manner of this mould is the charge door charging in the inwall setting of mould die cavity, that is the sidewall charging (as shown in Figure 3) in the charge space that constitutes by die cavity, feeding manner like this, if the difficulty that must cause sealing ring to be provided with is with sealing ring design envelope material above charging aperture, though possible in theory, but during sealing ring process charging aperture, can be fed a mouthful cut wound, damage sealing ring, not have sealing function; If with sealing ring design envelope material below charging aperture, under high pressure, raw material can leak along charging aperture, in case raw material leaks, will inevitably occur cracking or crackle during the goods sintering, forms waste product.Therefore, between manual charging and automatic feed, the production method of this backwardness of manual material loading has all been selected by most of producers.
After above-mentioned craft and auto feed, the hydraulic press upper cylinder moves downward, and it is descending to drive cover plate (pick trough is arranged), and begins to exert pressure downwards goods are suppressed.Give counterdie with certain support force with oil cylinder at present, when the pressure of upper cylinder during greater than the abutment pressure of oil cylinder down, it is slowly descending that the die cavity of mould and core bar begin, and drift is motionless, extrudes the moisture in the raw material, and the compressed products volume makes product reach the density of regulation.Magnetize in the magnetic field that in pressing process raw material is imposed prescribed direction, intensity, demagnetizing makes the product orientation; The moisture of extruding in the raw material siphons away with negative pressure by the cover plate that pick trough is arranged; After hydraulic press reaches rated pressure, opening mold, the hydraulic press upper cylinder returns earlier, it is up to drive cover plate, arrives setting height and stops, following oil cylinder returns again, drive mold cavity, core bar comes downwards to drift on same plane, the compacting green compact take off to be touched (as shown in Figure 4).Whole pressing process is controlled automatically by control system.
Three, the sintering green compact become blank:
Green compact with the moulding of above-mentioned compacting when dry certain hour reaches the moisture content of regulation, enter kiln by technological requirement, through processes such as oven dry, high-temperature roasting, insulations, sinter the goods blank into.
Four, be processed into product behind the blank:
With the goods blank of sinter molding, through the product of grinding to given size, the check vanning.
Summary of the invention
The method and the moulding facility thereof that the purpose of this invention is to provide a kind of full-automatic wet production magnet steel moulded products to enhance productivity, reduce labor strength, cut down the consumption of energy, and reduce waste product, improve the product row yielding of magnet steel goods.Technical solution of the present invention is as follows:
The method of this full-automatic wet production magnet steel moulded products, comprise the preparation slip, the compression moulding green compact, the sintering green compact are to be processed into steps such as product behind blank and the blank, the employed moulding facility of described compression moulding green compact step comprise hydraulic press, mould and control system, mold component is connected with the hydraulic press corresponding component, the control of the controlled system of operation, in this compression moulding green compact step, start hydraulic press, die cavity, core bar moves to desired location, plane, die cavity top and plane, core bar top are in same level, the die cavity lifting control small oil tank of control guide-post of die-set top setting is up separately, drive die cavity with respect to the core bar upstroke, make plane, die cavity top be higher than plane, core bar top, it is descending that the hydraulic press upper cylinder moves downward drive patrix cover plate, with the counterdie closure, by the patrix cover plate, die cavity, drift and core bar interface constitute sealing charge space, be provided with the center feed orifice at the core bar center, the charging aperture of feed orifice bottom, center is communicated with the bottom feed bin, center feed orifice open top is a charge door, charge door is reinforced to the charge space thus, the reinforced magnetic field that simultaneously raw material is imposed prescribed direction and intensity makes the raw material orientation, reinforced finishing, during pressurization, the hydraulic press upper cylinder begins to exert pressure, unnecessary slip returns feed bin along charge door, the lifting control small oil tank on control guide-post of die-set top descends, the die cavity fast return is to the position of the same level in its plane, top and plane, core bar top, cover plate is sealed charge door, finish compacting after, opening mold, the hydraulic press upper cylinder returns earlier, the drive cover plate is up, and after the arrival setting height, oil cylinder returns under the hydraulic press, drive mold cavity, core bar come downwards to simultaneously with drift on same plane, the demoulding of moulding green compact.
The core process step of the method for wet production magnet steel moulded products is these steps of compression moulding green compact, the automatic feed compression moulding step of current prior art, though be feasible in theory, but because of the uplink and downlink of die cavity and core bar link all the time, the same all the time level of its top plan is in same horizontal level, and charge door can only be arranged on the inwall of die cavity, reinforced from the side, this but is difficult to carry out in actual production; Because the auto feed mode is difficult to carry out, so in current production, the general semi-automatic production technology that is still hand charge of Cai Yonging.Change the situation of prior art, realize purpose of the present invention, its key is the feeding manner that solves this processing step of compression moulding green compact, by realizing real feasible auto feed mode, thereby really realizes the full-automation of wet production magnet steel moulded products method.Concrete scheme is: 1. during charging, except that die cavity, core bar are subjected to down oil cylinder control upstream and downstream motion simultaneously, solve and control the uplink and downlink campaign of die cavity separately with respect to core bar, during control die cavity upstroke, provide the sealing charge space that constitutes by die cap plate, die cavity, drift and core bar interface; 2. solve reinforced problem from the core bar top, promptly the center feed orifice is set at the core bar center, open top with core bar center feed orifice is a charge door, reinforced to above-mentioned sealing charge space, during pressurization, the position of the same level in its plane, top and plane, core bar top is got back in the downward movement of control die cavity, cover plate is sealed charge door, after finishing compacting, control die cavity, core bar be simultaneously descending to be back to its plane, top and drift top at same horizontal plane, the demoulding of moulding green compact.In brief, when reinforced, die cavity is controlled up separately, after the mould closure, form sealing charge space between patrix cover plate, die cavity, core bar and drift interface, during the green compact pressurization, the die cavity controlled down is got back to the position of the same level in its plane, top and plane, core bar top; After finishing pressurization, die cavity, core bar are controlled by oil cylinder, and simultaneously descending its plane, top and the plane, drift top of being back to be in same level, moulding green compact disengaging extrusion forming interface, the demoulding of moulding green compact.
Moulding facility according to the method for above-mentioned full-automatic wet production magnet steel moulded products, form by hydraulic press, mould and automatic control system, described mould comprises upper die and lower die, die cavity, core bar, cover plate, guide pillar, feed bin, drift, die cavity 1 is connected with the small oil tank Y1 that install on guide pillar 4 tops, core bar 2 has center feed orifice 2-1, center feed orifice 2-1 underfeed mouth 2-2 is communicated with feed bin 5, the open top of core bar center feed orifice 2-1 is charge door 2-3, and the lower end of core bar 2, guide pillar 4 is connected with oil cylinder Y2 under the hydraulic press.
The small oil tank Y1 that these facility are installed by guide pillar 4 tops, control die cavity 1 is with respect to core bar 2 up-downgoing campaigns, die cavity 1 is during with respect to core bar 2 upstrokes, constitute sealing charge space KJ by patrix cover plate, die cavity, drift and core bar interface, die cavity 1 is during with respect to core bar 2 downward movements, the cover closure charge door; The charging aperture 2-2 charging that center feed orifice 2-1 is communicated with feed bin 5 by its underpart is that charge door 2-3 is reinforced to charge space KJ from the open top of core bar center feed orifice 2-1.
The present invention has following technological merit:
1, solved the independent uplink and downlink motion problems of having controlled die cavity, the die cavity lifting control oil cylinder by the guide pillar top at mould is provided with makes die cavity with respect to the core bar upstroke, provides the charging space; At the core bar center center feed orifice is set, the charging aperture of its underpart is communicated with feed bin, slip is reinforced to the charge space from the top of core bar center feed orifice, really realized the feed way automation, thereby it is full-automatic that the compression moulding process is realized, significantly shortens the compression moulding time, cuts down the consumption of energy, increase substantially production efficiency, reduce labor strength.
2, the automation because realization is fed in raw material, so the product feeding quantity is constant, the product size unanimity.The product density unanimity, product magnetic property stable and consistent improves the product row yielding.
3, die surface totally cleans, and can prolong die life and reduce the number of times that repairs a die.
Description of drawings
Fig. 1 existing mold structure hand charge schematic diagram
Fig. 2 existing mold structure auto feed schematic diagram
Fig. 3 existing mold auto feed shaping schematic view
Fig. 4 existing mold structure demoulding schematic diagram
Fig. 5 mould structure of the present invention and auto feed schematic diagram
Fig. 6 mould structure of the present invention and compacting green compact schematic diagram
Fig. 7 mould structure of the present invention and demoulding schematic diagram
Embodiment
The method of the full-automatic wet production magnet steel of the present invention moulded products, comprise the preparation slip, the compression moulding green compact, the sintering green compact are to be processed into steps such as product behind blank and the blank, the compression moulding green compact are core process steps of the method for wet production magnet steel moulded products, the automatic feed compression moulding step of current prior art, though be feasible in theory, but because of the uplink and downlink of die cavity and core bar link all the time, its top is concordant all the time, be in same horizontal level, charge door is arranged on the inwall of die cavity, reinforced from the side, this but is difficult to carry out in actual production; Because the auto feed mode is difficult to carry out, so in current production, the general semi-automatic production technology that is still hand charge of Cai Yonging.Change the situation of prior art, realize purpose of the present invention, its key is the feeding manner that solves this processing step of compression moulding green compact, its solution is to control the uplink and downlink campaign of die cavity separately, when controlling die cavity with respect to the core bar upstroke, provide the charge space that forms by die cavity, core bar and drift interface, at the core bar center center feed orifice is set, open top with core bar center feed orifice is a charge door, reinforced to the charge space, during pressurization, the control die cavity is descending gets back to the position concordant with the core bar top; After finishing compacting, die cavity, core bar come downwards to drift on same plane, the demoulding of moulding green compact.
Now, further specify the present invention and how to implement in conjunction with facility accompanying drawing of the present invention:
As shown in Figure 5, mould comprises upper die and lower die, die cavity, core bar, cover plate, guide pillar, feed bin, drift, die cavity 1 is installed small oil tank Y1 with guide pillar 4 tops and is connected, the lower end of core bar 2, guide pillar 4 is connected with oil cylinder Y2 under the hydraulic press, core bar 2 has center feed orifice 2-1, center feed orifice 2-1 underfeed mouth 2-2 is communicated with feed bin 5, and the open top of core bar center feed orifice 2-1 is charge door 2-3.
In compression moulding green compact step, start hydraulic press, die cavity, core bar moves to desired location, plane, die cavity top and plane, core bar top are in same level, the die cavity lifting control small oil tank Y1 that controls the setting of guide-post of die-set 4 tops more separately is up, make die cavity 1 with respect to core bar 2 upstrokes, make plane, die cavity top be higher than plane, core bar top, it is descending that hydraulic press upper cylinder Y3 moves downward drive patrix cover plate 3, with the counterdie closure, by patrix cover plate 3, die cavity 1, drift 6 and core bar 2 interfaces constitute sealing charge space KJ, be provided with center feed orifice 2-1 at the core bar center, the charging aperture 2-2 of feed orifice 2-1 bottom, center is communicated with feed bin 5, center feed orifice 2-1 is that charge door 2-3 is to charge space KJ reinforced (as shown in Figure 5) from open top, the reinforced magnetic field that simultaneously raw material is imposed prescribed direction and intensity makes the raw material orientation, reinforced finishing, during pressurization, hydraulic press upper cylinder Y3 begins to exert pressure, unnecessary slip returns feed bin 5 along charge door 2-3, the lifting control small oil tank Y1 on control guide-post of die-set 4 tops descends, the position of the same level in its plane, top and plane, core bar top is got back in die cavity 1 quick downward movement, cover plate 3 is sealed charge door 2-3 (as shown in Figure 6), after finishing compacting, opening mold, hydraulic press upper cylinder Y3 returns earlier, and it is up to drive cover plate 3, after the arrival setting height, oil cylinder Y2 returns under the hydraulic press, drive mold cavity 1, core bar 2 comes downwards to its plane, top and plane, drift top simultaneously at same horizontal level, as shown in Figure 7, and the demoulding of moulding green compact.
Claims (4)
1. the method for a full-automatic wet production magnet steel moulded products, comprise the preparation slip, the compression moulding green compact, the sintering green compact are to be processed into the product step behind blank and the blank, the employed moulding facility of described compression moulding green compact step comprise hydraulic press, mould and control system, mold component is connected with the hydraulic press corresponding component, the control of the controlled system of operation, it is characterized in that when this compression moulding green compact step, start hydraulic press earlier, following oil cylinder control die cavity, core bar moves to desired location, this moment, plane, die cavity top and plane, core bar top were in same level, control die cavity more separately with respect to the core bar upstroke, make plane, die cavity top be higher than plane, core bar top, the downward movement of hydraulic press upper cylinder, drive the descending and counterdie closure of patrix cover plate, promptly by the patrix cover plate, die cavity, drift and core bar interface constitute sealing charge space, the facility bottom is provided with feed bin, be provided with the center feed orifice at the core bar center, the charging aperture of feed orifice bottom, center is communicated with feed bin, reinforced by center feed orifice open top charge door to the charge space, the reinforced magnetic field that simultaneously raw material is imposed prescribed direction and intensity makes the raw material orientation, reinforced finishing, during pressurization, the hydraulic press upper cylinder begins to exert pressure, unnecessary slip returns feed bin along charge door, the fast return of control die cavity is to the position of the same level in its plane, top and plane, core bar top separately, cover plate is sealed charge door, after finishing compacting, opening mold, it is up that the hydraulic press upper cylinder drives cover plate, oil cylinder is descending under the hydraulic press, drive mold cavity, core bar comes downwards to its plane, top and plane, drift top simultaneously in same level, the demoulding of moulding green compact.
2. according to the method for a kind of full-automatic wet production magnet steel moulded products of claim 1, it is characterized in that controlling separately the uplink and downlink campaign of die cavity, be to realize by the lifting control oil cylinder that is arranged on guide-post of die-set top, the lifting control oil cylinder on control guide-post of die-set top is with respect to the core bar upstroke separately, promptly provide the charging space, the bottom feed bin charging of the charging aperture of feed orifice bottom, core bar center from being communicated with it, by open top is that charge door is reinforced to the charge space, during pressurization, the lifting control oil cylinder on control guide-post of die-set top descends, die cavity promptly is back to the position of the same level in its plane, top and plane, core bar top fast, cover plate is sealed charge door, after finishing compacting, opening mold, it is up that the hydraulic press upper cylinder drives cover plate, and oil cylinder is descending under the hydraulic press, drive mold cavity, core bar comes downwards to its plane, top and plane, drift top simultaneously in same level, the demoulding of moulding green compact.
3. the moulding facility that are used for the method for a kind of full-automatic wet production magnet steel moulded products as claimed in claim 1, form by hydraulic press, mould and control system, mould comprises upper die and lower die, die cavity, core bar, cover plate, guide pillar, feed bin, drift, it is characterized in that the lifting control oil cylinder (Y1) that install on die cavity (1) and guide pillar (4) top is connected, there is center feed orifice (2-1) at the center of core bar (2), and the facility bottom is provided with feed bin (5).
4. according to the moulding facility of the method that is used for full-automatic wet production magnet steel moulded products of claim 3, it is characterized in that center feed orifice (2-1) underfeed mouth (2-2) is communicated with bottom feed bin (5), the open top of core bar center feed orifice (2-1) is charge door (2-3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100525739A CN101335128B (en) | 2007-06-28 | 2007-06-28 | Method for producing magnetic steel molding product by full-automatic wet process and molding machinery thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007100525739A CN101335128B (en) | 2007-06-28 | 2007-06-28 | Method for producing magnetic steel molding product by full-automatic wet process and molding machinery thereof |
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| Publication Number | Publication Date |
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| CN101335128A CN101335128A (en) | 2008-12-31 |
| CN101335128B true CN101335128B (en) | 2011-05-25 |
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| CN2007100525739A Expired - Fee Related CN101335128B (en) | 2007-06-28 | 2007-06-28 | Method for producing magnetic steel molding product by full-automatic wet process and molding machinery thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103736997A (en) * | 2013-12-31 | 2014-04-23 | 昆山优磁电子有限公司 | RM type magnetic core mould |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000127122A (en) * | 1998-10-22 | 2000-05-09 | Tdk Corp | Draining method for wet powder material and device therefor |
| CN2798272Y (en) * | 2005-02-05 | 2006-07-19 | 横店集团东磁有限公司 | Special forming mould for orientation of special magnetic field of circular magnetic steel |
| CN2881914Y (en) * | 2005-12-31 | 2007-03-21 | 横店集团东磁有限公司 | Singleline bag special magnetic-field forming module |
-
2007
- 2007-06-28 CN CN2007100525739A patent/CN101335128B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000127122A (en) * | 1998-10-22 | 2000-05-09 | Tdk Corp | Draining method for wet powder material and device therefor |
| CN2798272Y (en) * | 2005-02-05 | 2006-07-19 | 横店集团东磁有限公司 | Special forming mould for orientation of special magnetic field of circular magnetic steel |
| CN2881914Y (en) * | 2005-12-31 | 2007-03-21 | 横店集团东磁有限公司 | Singleline bag special magnetic-field forming module |
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