CN107351223A - A kind of float type liquid press and its method of work - Google Patents
A kind of float type liquid press and its method of work Download PDFInfo
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- CN107351223A CN107351223A CN201710774197.8A CN201710774197A CN107351223A CN 107351223 A CN107351223 A CN 107351223A CN 201710774197 A CN201710774197 A CN 201710774197A CN 107351223 A CN107351223 A CN 107351223A
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- piston
- mould bases
- feeding hopper
- die cavity
- type liquid
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- 239000007788 liquid Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 83
- 239000002002 slurry Substances 0.000 claims abstract description 50
- 239000000696 magnetic material Substances 0.000 claims abstract description 30
- 238000007789 sealing Methods 0.000 claims description 54
- 238000005086 pumping Methods 0.000 claims description 24
- 238000007493 shaping process Methods 0.000 claims description 20
- 238000003825 pressing Methods 0.000 claims description 14
- 238000004804 winding Methods 0.000 claims description 13
- 230000011664 signaling Effects 0.000 claims description 10
- 125000006850 spacer group Chemical group 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 6
- 239000003921 oil Substances 0.000 abstract description 15
- 239000010720 hydraulic oil Substances 0.000 abstract description 3
- 239000011797 cavity material Substances 0.000 description 62
- 230000000694 effects Effects 0.000 description 10
- 238000007667 floating Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000004826 seaming Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/26—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
- B28B1/265—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor pressure being applied on the slip in the filled mould or on the moulded article in the mould, e.g. pneumatically, by compressing slip in a closed mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/26—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
- B28B1/261—Moulds therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
- B28B17/0063—Control arrangements
- B28B17/0081—Process control
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
- H01F13/003—Methods and devices for magnetising permanent magnets
Abstract
The invention discloses a kind of float type liquid press and its method of work, belong to technical field of magnetic materials.It includes the mould bases in fuselage, and piston is located at mould bases bottom, is magnetizer at the top of mould bases, be upper piston at the top of magnetizer, in addition to material injecting device, material injecting device is interior to be provided with material-pulling device, material-pulling device connects with material feeding hopper, and material feeding hopper outlet connects with mould bases；Also include encoder, pressure sensor and hydraulic system, encoder is located in piston, and pressure sensor is located in the die cavity of mould bases, and encoder and pressure sensor are connected with hydraulic system, and hydraulic system is connected with lower oil cylinder, lower hydraulic oil cylinder driving piston.For prior art green compact thickness error of the magnetic slurry after formed product the problem of, it can reduce the forming errors of magnetic product, improve formed product rate.
Description
Technical field
The present invention relates to technical field of magnetic materials, more particularly to a kind of float type liquid press and its method of work.
Background technology
With industrial expansion, China turns into magnetic materials production big country, and the making of magnetic material needs hydrous slurry
Preparation, Wet-pressing molding, sintering, mill processing, go-on-go, pack several big processes, Wet-pressing molding is the work of most critical in all process steps
Sequence, so wet-press enjoys manufacturing enterprise to pay close attention to.The pressing process that the country generally uses is floating type, the slurry pressure of upper pressure
The state during type is made, 9 grades only up to be reached by constraining product magnetic property.Upper cylinder oppresses mold cavity to floating downward
Dynamic, lower die head is fixed, forces die cavity volume reducing, the moisture in permanent magnetism slurry is extruded and is molded.It is but this floating
Dynamic formula Wet-pressing molding hydraulic press, when die cavity, which floats, to be pushed, hydrous slurry and material particles are moved downward, and moisture is then walked upwards
It is extruded out, the trend of moisture and the direction of motion contrast of material particles, outer arc table when magnetic shoe shape green compact are molded in addition
Face first reaches density, and moisture is crossed its outer arc high-density layer, and in addition to molding time is grown, and what is more important moisture is worn by force
More outer arc when the defects of easily causing blank crackle, make green compact of poor quality.Simultaneously as die cavity floats, it is difficult to accurate control type
The work loading height of intracavitary slurry, the green compact thickness deviation of shaping is larger, and uniformity is poor.
Moisture content is higher in raw material slurry, and upper cylinder compressing mold cavity is when floating downwards, and it is big to walk water, and floating stroke
Greatly, formed product is slow, and efficiency is low, and the influence of passing through by force of moisture is magnetized effect；Die cavity sealing effectiveness is poor, influence slurry conveying and
The pressure of feeding, while the density after formed product is also influenceed, defect ware is also easy to produce, formed product rate is low.
Due to the characteristic of the floating type shaping of upper pressure, controlled plus using the relatively low proximity switch of positional precision so that product into
Green compact thickness error after type is more than 0.50 millimeter, adds the workload of later process, while cause the waste of raw material.
Have that suppression process time length, waste of material, product size precision are low, of poor quality, equipment loss rate is big, power consumption is big.State
Problem be present in outer similar Hydraulic press product：A, operating pressure is more than 31MP magnetic material technologies, under limiting condition, equipment component damage
Consumption is big, can not normally reach standard press power；B, filling system design defect, raw material slurry is caused to infilter hydraulic oil, so as to
Injury device；C, it is reductor chain structure to take base system, and position error is big, produce small sized product when because position deviation and
Generating routine chain rupture, it is impossible to normal production；D, without balance system when product is deviate from, finished product bias damage is produced；E, die face is cleaned
Hydraulic-driven, power reach 22kW, and electricity consumption wastes serious.
Chinese invention patent, Application No.：201210279140.8 publication date：2014.07.02 disclose a kind of hydraulic pressure
Machine, including fliud flushing valve, master cylinder, entablature, column, sliding block, floating work bench, cope plate, upper compression leg, seaming chuck, former, under
Pressure head, lower compression leg, lower template, sill, electrical control cabinet (included touch screen and PLC), fuel tank, hydraulic station, floating cylinder, electricity
Machine and hydraulic pump, hydraulic valve, base and fliud flushing fuel tank.It is disadvantageous in that：Although and float type liquid press ought be not
Consider pressure and sealing effectiveness during formed product.
The content of the invention
1. invention technical problems to be solved
For prior art green compact thickness error of the magnetic slurry after formed product it is big the problem of, the invention provides
A kind of float type liquid press and its method of work.It can reduce the forming errors of magnetic product, improve formed product rate.
2. technical scheme
To solve the above problems, technical scheme provided by the invention is：
A kind of float type liquid press, including the mould bases in fuselage, piston are located at mould bases bottom, are to magnetize at the top of mould bases
Device, be upper piston at the top of magnetizer, in addition to material injecting device, is provided with material-pulling device in material injecting device, material-pulling device and is noted
Expect hopper connection, material feeding hopper outlet connects with mould bases；
Also include encoder, pressure sensor and hydraulic system, encoder is located in piston, and pressure sensor is located at mould bases
Die cavity in, encoder and pressure sensor are connected with hydraulic system, and hydraulic system is connected with lower oil cylinder, and lower hydraulic oil cylinder driving is lived
Plug.
Preferably, described mould bases includes top mold frame and lower mold holder, is die cavity between top mold frame and lower mold holder, piston is with
Mould bases connects, and piston base is lower oil cylinder, and material feeding hopper outlet connects with the die cavity of mould bases.
Preferably, in addition to pumping plant, charging device and pipeline, pumping plant are located on ground level, and beside fuselage, pumping plant passes through pipe
Road is connected with charging device, and charging device is connected with upper piston, and pumping plant is connected with hydraulic control system.
Preferably, in addition to paper winding device, described paper winding device include coil paper and two pairs of disk rollers, divide on fuselage both sides
Not She You a pair of disk rollers, tangent above and below the excircle of each pair disk roller, the phase tangent line of two pairs of disk rollers is higher than skin on the same line
Horizontal plane where band conveyer, coil paper is on the phase tangent line of two pairs of disk rollers.
Preferably, described piston is connected with mould bases sealed bottom, and sealing structure is Archimedian screw sealing and labyrinth
The combination of sealing, Archimedian screw sealing are located at labyrinth seal top.
Preferably, Archimedian screw sealing include successively from top to bottom V-shaped seal ring, spiral sealing ring, spacer,
V-shaped seal ring and positioning sleeve, the inner headed face of V-shaped seal ring, positioning sleeve and spacer are connected with tight with piston formula, periphery and mould
Frame bottom connects, and the bottom of positioning sleeve is labyrinth seal.
Preferably, described mould bases includes top mold frame and lower mold holder, is die cavity between top mold frame and lower mold holder, piston is with
Mould bases connects, and piston base is lower oil cylinder, and material feeding hopper outlet connects with the die cavity of mould bases.
Preferably, described magnetizer includes magnetize body, line bag and line bag fixing device, and the described body that magnetizes is wound with
Line bag, magnetizes body and line bag is respectively positioned on line bag fixing device.
Preferably, described material injecting device also includes material feeding hopper, agitator and motor, and agitator is located at material feeding hopper
Interior, motor is erected above material feeding hopper, motor driving agitator motion, in the magnetic material that material feeding hopper outlet connects with mould bases
Slurry transfer pipeline is provided with material-pulling device, and material-pulling device is provided with high-power delivery pump.
A kind of method of work of float type liquid press, its step are：
A, a kind of above-described float type liquid press is built, mould cavity pressure size and piston are preset in hydraulic system
Position；
B, feeding：Motor drives agitator to stir magnetic slurry in the material feeding hopper in material injecting device, and material feeding hopper leads to
Cross magnetic material conveyance conduit and inject magnetic material into the die cavity of mould bases；
C, high pressure sealing is suppressed：Pumping plant drives upper piston to move down by charging device, and upper piston moves down promotion and magnetized
Device moves down, and magnetizer bottom promotes top mold frame to move down matched moulds, the excessive moisture in magnetic slurry in die cavity is extruded, water
Divide and emitted by the filter opening in top mold frame；
D, magnetize：Magnetizer magnetizes to magnetic material while compacting, and hydraulic control system is powered to line bag
Afterwards, the body that magnetizes arrangement magnetic, to product magnetizing while compacting；
E, compensation control：In pressing process, the real-time pressure in die cavity is delivered to liquid by the pressure sensor in die cavity
Pressure control system, hydraulic control system is compared with preset pressure, and encoder in piston is by the position signalling not stealpass of piston
Be defeated by hydraulic control system, hydraulic control system compared with default piston position, when pressure that pressure sensor detects and
When the position signalling that encoder detects is identical with the position size of preset pressure and piston respectively, hydraulic control system is to piston
Instruction being sent, stopping applying driving force to piston, piston continues to move compacted products because cushion stroke error be present, because default
The part is had contemplated that during the position of pressure and piston, so, compensating action is just played, the cushion stroke error is offset and is brought
Formed product error, lower mold holder influenceed to taper off displacement by buffer piston journey error；
F, base is taken：By in the transferred product of shaping to belt conveyor.
3. beneficial effect
Using technical scheme provided by the invention, compared with prior art, have the advantages that：
(1) present invention, can be by the low (prior art of moisture content using pump function using the material-pulling device in material feeding hopper
Generally 32%-36%, be 28%-36% in the application, can be when specifically used 28%, 29%, 30%, 35% or
36%) magnetic slurry pipeline transport shaping speed into mould bases is fast, and shaping efficiency is high, good product consistency, zero defect；
(2) present invention is using hydraulic system compensation control principle, according to product requirement size and the mould cavity pressure of mould bases
It is relevant with piston position, the cushion stroke error of piston is added in product size, i.e., when mould cavity pressure and piston position are equal
When reaching designated value, reach product requirement size using the cushion stroke error of piston, i.e., mend the cushion stroke error of piston
Repay into, prevent influence of the cushion stroke error of piston to formed product size in advance, reduce thickness error.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the side view of the present invention；
Fig. 3 is the piston sealing structure schematic diagram of the present invention；
Fig. 4 is Fig. 3 A-A schematic diagrames；
Fig. 5 is Fig. 3 B-B schematic diagrames.
Label declaration in schematic diagram：
1st, fuselage；11st, sealing flange one；12nd, sealing flange two；3rd, positioning sleeve；4th, spiral sealing ring；41st, V-seal
Circle；5th, spacer；6th, soft seal one；7th, soft seal two；8th, piston；131st, line bag；132nd, magnetize body；133rd, line bag fixing device；
141st, coil paper；151st, material feeding hopper；16th, mould bases；161st, top mold frame；162nd, lower mold holder；81st, encoder；82nd, lower oil cylinder；83rd, on
Piston；91st, pumping plant；92nd, charging device；93rd, pipeline；10th, belt conveyor.
Embodiment
To further appreciate that present disclosure, with reference to accompanying drawing 1-5 and embodiment, the present invention is described in detail.
Embodiment 1
With reference to accompanying drawing 1-5, a kind of magnetic product formation system in a kind of float type liquid press, including in fuselage 1
Mould bases 16, piston 8 is located at the bottom of mould bases 16, and the top of mould bases 16 be magnetizer, and magnetizer top is upper piston 83, is also wrapped
Include material injecting device, material-pulling device be provided with material injecting device, material-pulling device connects with material feeding hopper 151, material feeding hopper 151 export and
Mould bases 16 connects.
Using the material-pulling device in material feeding hopper 151, using pump function can low (prior art be generally by moisture content
32%-36%, it is 28%-36% in the application, can is 28%, 29%, 30%, 35% or magnetic 36%) when specifically used
Property slurry pipeline transport shaping speed into mould bases 16 it is fast, shaping efficiency is high, good product consistency, zero defect.
Described material injecting device also includes material feeding hopper 151, agitator and motor, and agitator is located in material feeding hopper 151,
Motor is erected at the top of material feeding hopper 151, motor driving agitator motion.
Agitator constantly stirs to the slurry in material feeding hopper 151, so that magnetic material moisture content is consistent, it is ensured that final production
The size of product shaping and the uniformity of performance.
Exported in material feeding hopper 151 and material-pulling device is provided with the magnetic slurry pipeline transport pipeline connected with mould bases 16, pusher dress
Put and be provided with high-power delivery pump.
The magnetic slurry that high-power delivery pump on material-pulling device will flow out in material feeding hopper 151, is strongly pushed into mould bases
In 16, certain pressure is provided for formed product, by the effect suppressed, magnetic material is reduced and conveys the spent time, improve
Production efficiency, while high-power delivery pump, reduce the requirement to magnetic slurry moisture content, can be used for the magnetic of more low-water-content
The conveying of property slurry, as little as 28%.
Described piston 8 is connected with the sealed bottom of mould bases 16, and sealing structure is Archimedian screw sealing and labyrinth seal
Combination, Archimedian screw sealing is located at labyrinth seal top.
On the one hand the effect of sealing makes to keep high pressure in mould bases 16, the moisture content that high pressure can reduce magnetic product in itself will
Ask, the magnetic slurry of lower moisture content can be molded in mould bases 16, on the other hand, aqueous when suppressing same product
The space that the low magnetic material of rate takes in mould bases 16 is small, so as to reduce the stroke of pressing process, improves operating efficiency.
Described labyrinth seal includes sealing flange 1, sealing flange 2 12 and soft seal 1, the sealing flange one
11 side is provided with square labyrinth groove, and it is convex that the side relative with sealing flange 2 12 of sealing flange 1 is provided with square labyrinth
Rise, the raised engagement type connection of square labyrinth groove and square labyrinth forms labyrinth seal；The sealing flange 1 and piston 8 are solid
Determine junction and soft seal 1 is set.
The quantity of the square labyrinth groove and square labyrinth projection is respectively 3, corresponds engagement type connection, labyrinth is close
Envelope is a kind of mechanical seal mode, tortuous sealing contact surface, extends stroke and difficulty that slurry exosmoses, plays the effect of sealing
Fruit.
The Archimedian screw sealing includes V-shaped seal ring 41, spiral sealing ring 4, spacer 5, V-type successively from top to bottom
Sealing ring 41 and positioning sleeve 3, the inner headed face of V-shaped seal ring 41, positioning sleeve 3 and spacer 5 is connected with the close-fit of piston 8, cylindrical
Face is connected with the bottom of mould bases 16, and the bottom of positioning sleeve 3 is labyrinth seal.
Archimedian screw is sealed into soft seal, using V-shaped seal ring 41 and the tortuous joint face structure of spiral sealing ring 4,
Further increase the stroke that slurry leaks into outside, good sealing effect so that the pressure in mould bases 16 is larger, improves shaping
Quality.
The disc up and down at the both ends of the spacer 5 is respectively provided with soft seal 27；V-shaped seal ring 41 in piston 8 radially layer by layer
It is superimposed.
The tortuous joint face structure of V-shaped seal ring 41, further increase the stroke that slurry leaks into outside, sealing effectiveness
It is good so that the pressure in mould bases 16 is larger, improves Forming Quality.
Described mould bases 16 includes top mold frame 161 and lower mold holder 162, is die cavity between top mold frame 161 and lower mold holder 162,
Piston 8 is connected with lower mold holder 162, and the bottom of piston 8 is lower oil cylinder 82, and the outlet of material feeding hopper 151 connects with the die cavity of mould bases 16.
Magnetic slurry in material feeding hopper 151 is delivered to by material-pulling device in the die cavity of mould bases 16, and upper piston 83 moves down, and pushes away
Dynamic top mold frame 161 moves down the magnetic material of pressing die intracavitary, and after compressing, upper piston 83 moves up, oily under HYDRAULIC CONTROL SYSTEM
The oiling of cylinder 82, driving piston 8 move up, product stripping.
Embodiment 2
A kind of magnetic product formation system in a kind of float type liquid press of the present embodiment is the same as embodiment 1, the present embodiment
A kind of magnetic product moulding process, its step is：
A, a kind of magnetic product formation system in a kind of float type liquid press described in embodiment 1 is built,
B, feeding：Motor drives agitator to stir magnetic slurry, material feeding hopper in the material feeding hopper 151 in material injecting device
151 utilize the effect of the high-power delivery pump of material-pulling device, by the magnetic slurry that moisture content is 28%-36%, pass through magnetic material
Material conveying tube road injects magnetic material into the die cavity of mould bases 16, and after filling slurry in die cavity, the slurry pipeline transport for closing die cavity enters
Mouthful；
C, high pressure sealing is suppressed and magnetized：Pumping plant 91 drives upper piston 83 to move down by charging device 93, upper piston
83, which move down promotion magnetizer, moves down, and magnetizer bottom promotes top mold frame 161 to move down matched moulds, by magnetic slurry in die cavity
Excessive moisture is extruded, and moisture is emitted by the filter opening in top mold frame 161, while magnetizer fills to magnetic material
Magnetic, lower mold holder 162 are displaced downwardly to extreme lower position, lower mold holder 162 by the squeezing action of the magnetic material in top mold frame 161 and die cavity
Bottom is connected with piston 8, and the sealing structure that the Archimedian screw sealing of the periphery of piston 8 is combined with labyrinth seal prevents magnetic material
Slurry is leaked, and sealing function is played in the motion process of lower mold holder 162, ensures the pressure state in die cavity；
D, it is stripped：After top mold frame 161 moves down matched moulds, the magnetic material in die cavity removes water, the product of shaping to specified size
Afterwards, top mold frame 161 stops moving down, and hydraulic system drives piston 8 to move up by lower oil cylinder 82, the lower mold holder 162 being connected with piston 8
Move up, meanwhile, shaped article, top mold frame 161 and magnetizer in die cavity move up, when the product arrival of shaping and skin
During band 10 same plane of conveyer, the stopping of piston 8 action, lower mold holder 162 stops displacement；
E, base is taken：By in the transferred product of shaping to belt conveyor 10.
The present invention can increase die cavity using the effect of material-pulling device by the higher slurry pipeline transport of moisture content to die cavity
Interior pressure, in addition, the sealing structure of piston 8 further ensure that pressure does not leak, further ensure the magnetic in die cavity
Material is in high pressure conditions all the time, can so ensure that pressing process stroke is small, reduces the press time, moisture is few, makes
Magnetic is more uniformly spread, and reduces compacting resistance, energy-efficient, in addition, the magnetic slurry that moisture content is low, and pressure it is constant and
The die cavity of high pressure, because good sealing effect, the pressing stroke of mould bases 16 is small during compacting, and the size of shaped article is more accurate, finally
Cause shaping product size error it is small, uniformity is good.
Embodiment 3
A kind of a kind of lower caging device of magnetic slurry shaping in the float type liquid press of the present embodiment, including positioned at machine
Mould bases 16 in body 1, piston 8 are located at the bottom of mould bases 16, and the top of mould bases 16 is magnetizer, is upper piston at the top of magnetizer
83, in addition to encoder, pressure sensor and hydraulic system, encoder be located in piston 8, pressure sensor is located at mould bases 16
In die cavity, encoder and pressure sensor are connected with hydraulic system, and hydraulic system is connected with lower oil cylinder 82, and lower oil cylinder 82 drives
Piston 8.
After product stops compacting in the prior art, mould bases 16 is acted on due to the driving force by piston 8, and speed can not
Be reduced to zero immediately, piston 8 has a buffer stage, is the cushion stroke error of piston 8, during this period, mould bases 16 because
Possessing certain velocity of displacement to continue to suppress, error is big after causing formed product, reaches ± 0.5mm, sometimes even ± 10mm,
The waste of raw material is caused, thickness error is big, and qualification rate is low, it is necessary to which grinding machine amount is big after sintering, waste material is more, during processing
Between long, low production efficiency.
And the application compensates control principle using hydraulic system, according to product requirement size and the mould cavity pressure of mould bases 16
It is relevant with the position of piston 8, the cushion stroke error of piston 8 is added in product size, i.e., when mould cavity pressure and the position of piston 8
When reaching designated value, reach product requirement size using the cushion stroke error of piston 8, i.e., miss the cushion stroke of piston 8
Difference compensation is entered, and is prevented influence of the cushion stroke error of piston 8 to formed product size in advance, is reduced thickness error.
Mould cavity pressure size and the position of piston 8 are preset in hydraulic system, in pressing process, the pressure in die cavity passes
Real-time pressure in die cavity is delivered to hydraulic control system by sensor, and hydraulic control system is compared with preset pressure, in piston 8
Encoder the position signalling of piston 8 is constantly transferred to hydraulic control system, hydraulic control system and the default position phase of piston 8
Compare, when the position signalling that the pressure and encoder that pressure sensor detects detect respectively with preset pressure and piston 8
When position size is identical, hydraulic control system sends instruction to piston 8, stops applying driving force to piston 8, piston 8 is because existing
Cushion stroke error continues to move compacted products, because having contemplated that the part at the position of preset pressure and piston 8, so, just
Play compensating action well, offset the cushion stroke error caused by formed product error, green compact can be produced in this way
Product control errors of the product control errors after ± 0.1mm, sintering reduce the stock removal of grinding machine, saved in ± 0.01mm
Raw material, process time is saved, improve production efficiency.
Described mould bases 16 includes top mold frame 161 and lower mold holder 162, is die cavity between top mold frame 161 and lower mold holder 162,
Piston 8 is connected with lower mold holder 162, and the bottom of piston 8 is lower oil cylinder 82, and the outlet of material feeding hopper 151 connects with the die cavity of mould bases 16.
Magnetic slurry in material feeding hopper 151 is delivered to by material-pulling device in the die cavity of mould bases 16, and upper piston 83 moves down, and pushes away
Dynamic top mold frame 161 moves down the magnetic material of pressing die intracavitary, and after compressing, upper piston 83 moves up, oily under HYDRAULIC CONTROL SYSTEM
The oiling of cylinder 82, driving piston 8 move up, product stripping.
Also include pumping plant 91, charging device 92 and pipeline 93, pumping plant 91 is located on ground level, the side of fuselage 1, and pumping plant 91 is logical
Cross pipeline 93 to connect with charging device 92, charging device 92 is connected with upper piston 83, and pumping plant 91 is connected with hydraulic control system.
Described magnetizer includes magnetize body 132, line bag 131 and line bag fixing device 133, the described body 132 that magnetizes
Wired bag 131 is wound, body 132 is magnetized and line bag 131 is respectively positioned on line bag fixing device 133.
After hydraulic control system is powered to line bag 131, the body 132 that magnetizes arrangement magnetic, to product magnetizing.
The described body 132 that magnetizes is super pure iron.The air gap of ordinary carbon steel hinders magnetic conduction, and line bag 131 is magnetizing coil, surpasses
The magnetic conduction arrangement of level pure iron is uniform, and magnetic field intensity is big.
Also include belt conveyor 10, described belt conveyor 10 is located at the side of mould bases 16.Belt conveyor 10 is used
Green compact after conveying is compressing, send to sintering and subsequent treatment.
Also include paper winding device, described paper winding device includes coil paper 141 and two pairs of disk rollers, set respectively on fuselage both sides
There are a pair of disk rollers, tangent above and below the excircle of each pair disk roller, the phase tangent line of two pairs of disk rollers is and defeated higher than belt on the same line
The place horizontal plane of machine 10 is sent, coil paper 141 is on the phase tangent line of two pairs of disk rollers.
Paper winding device also includes winding roll, and pumping plant 91 and material injecting device are located at the both sides of fuselage 1 respectively, and pumping plant 91 is close to machine
The side of body 1 is provided with winding roll, and the material feeding hopper 151 of material injecting device is provided with winding roll close to the side of fuselage 1, coil paper 141 from
One of winding roll by magnetizer lower section, then by another pair disk roller, reaches another through the tangent line of a pair of disk rollers
On winding roll.
Described material injecting device also includes material feeding hopper 151, agitator and motor, and agitator is located in material feeding hopper 151,
Motor is erected at the top of material feeding hopper 151, motor driving agitator motion, exports what is connected with mould bases 16 in material feeding hopper 151
Magnetic slurry pipeline transport pipeline is provided with material-pulling device, and material-pulling device is provided with high-power delivery pump.
Embodiment 4
A kind of lower limit method of magnetic slurry shaping in a kind of float type liquid press of the present embodiment, its step are：
A, a kind of lower caging device of magnetic slurry shaping in a kind of float type liquid press described in embodiment 3 is built,
Mould cavity pressure size and the position of piston 8 are preset in hydraulic system；
B, feeding：Motor drives agitator to stir magnetic slurry, material feeding hopper in the material feeding hopper 151 in material injecting device
151 utilize the effect of the high-power delivery pump of material-pulling device, by the magnetic slurry that moisture content is 28%-36%, pass through magnetic material
Material conveying tube road injects magnetic material into the die cavity of mould bases 16, and after filling slurry in die cavity, the slurry pipeline transport for closing die cavity enters
Mouthful；
C, high pressure sealing is suppressed：Pumping plant 91 drives upper piston 83 to move down by charging device 93, and upper piston 83 moves down
Magnetizer is promoted to move down, magnetizer bottom promotes top mold frame 161 to move down matched moulds, by the superfluous water in magnetic slurry in die cavity
Divide and extrude, moisture is emitted by the filter opening in top mold frame 161, and lower mold holder 162 is by the magnetic in top mold frame 161 and die cavity
Property material squeezing action be displaced downwardly to extreme lower position, the bottom of lower mold holder 162 is connected with piston 8, Archimedes's spiral shell of the periphery of piston 8
The sealing structure that rotation sealing is combined with labyrinth seal prevents magnetic slurry from leaking, and sealing is played in the motion process of lower mold holder 162
Effect, ensure the pressure state in die cavity；
D, magnetize：Magnetizer magnetizes to magnetic material while compacting, and hydraulic control system is logical to line bag 131
After electricity, the body 132 that magnetizes arrangement magnetic, to product magnetizing while compacting；
E, compensation control：After top mold frame 161 moves down matched moulds, the magnetic material in die cavity removes water, and the product of shaping is to specifying
After size, top mold frame 161 stops moving down, and hydraulic system drives piston 8 to move up by lower oil cylinder 82, the lower mould being connected with piston 8
Frame 162 moves up, meanwhile, shaped article, top mold frame 161 and magnetizer in die cavity move up, in pressing process, mould
Real-time pressure in die cavity is delivered to hydraulic control system, hydraulic control system and preset pressure phase by the pressure sensor of intracavitary
Compare, the position signalling of piston 8 is constantly transferred to hydraulic control system by the encoder in piston 8, hydraulic control system with it is pre-
If the position of piston 8 compares, when the position signalling that the pressure and encoder that pressure sensor detects detect is respectively with presetting
When pressure is identical with the position size of piston 8, hydraulic control system sends instruction to piston 8, stops applying driving to piston 8
Power, piston 8 continues to move compacted products because cushion stroke error be present, because being had contemplated that at the position of preset pressure and piston 8
The part, so, compensating action is just played, offsets formed product error caused by the cushion stroke error, lower mold holder 162
Influenceed to taper off displacement by the cushion stroke error of piston 8；
F, base is taken：By in the transferred product of shaping to belt conveyor 10.
Embodiment 5
A kind of float type liquid press of the present embodiment, including the mould bases 16 in fuselage 1, piston 8 are located at the bottom of mould bases 16
Portion, the top of mould bases 16 be magnetizer, and magnetizer top is upper piston 83, in addition to material injecting device, are provided with material injecting device
Material-pulling device, material-pulling device connect with material feeding hopper 151, and the outlet of material feeding hopper 151 connects with mould bases 16；
Also include encoder, pressure sensor and hydraulic system, encoder is located in piston 8, and pressure sensor is located at mould
In the die cavity of frame 16, encoder and pressure sensor are connected with hydraulic system, and hydraulic system is connected with lower oil cylinder 82, lower oil cylinder
82 driving pistons 8.
Described mould bases 16 includes top mold frame 161 and lower mold holder 162, is die cavity between top mold frame 161 and lower mold holder 162,
Piston 8 is connected with lower mold holder 162, and the bottom of piston 8 is lower oil cylinder 82, and the outlet of material feeding hopper 151 connects with the die cavity of mould bases 16.
Also include pumping plant 91, charging device 92 and pipeline 93, pumping plant 91 is located on ground level, the side of fuselage 1, and pumping plant 91 is logical
Cross pipeline 93 to connect with charging device 92, charging device 92 is connected with upper piston 83, and pumping plant 91 is connected with hydraulic control system.
Also include paper winding device, described paper winding device includes coil paper 141 and two pairs of disk rollers, set respectively on fuselage both sides
There are a pair of disk rollers, tangent above and below the excircle of each pair disk roller, the phase tangent line of two pairs of disk rollers is and defeated higher than belt on the same line
The place horizontal plane of machine 10 is sent, coil paper 141 is on the phase tangent line of two pairs of disk rollers.
Described piston 8 is connected with the sealed bottom of mould bases 16, and sealing structure is Archimedian screw sealing and labyrinth seal
Combination, Archimedian screw sealing is located at labyrinth seal top.
The Archimedian screw sealing includes V-shaped seal ring 41, spiral sealing ring 4, spacer 5, V-type successively from top to bottom
Sealing ring 41 and positioning sleeve 3, the inner headed face of V-shaped seal ring 41, positioning sleeve 3 and spacer 5 is connected with the close-fit of piston 8, cylindrical
Face is connected with the bottom of mould bases 16, and the bottom of positioning sleeve 3 is labyrinth seal.
Described mould bases 16 includes top mold frame 161 and lower mold holder 162, is die cavity between top mold frame 161 and lower mold holder 162,
Piston 8 is connected with lower mold holder 162, and the bottom of piston 8 is lower oil cylinder 82, and the outlet of material feeding hopper 151 connects with the die cavity of mould bases 16.
Described magnetizer includes magnetize body 132, line bag 131 and line bag fixing device 133, the described body 132 that magnetizes
Wired bag 131 is wound, body 132 is magnetized and line bag 131 is respectively positioned on line bag fixing device 133.
Described material injecting device also includes material feeding hopper 151, agitator and motor, and agitator is located in material feeding hopper 151,
Motor is erected at the top of material feeding hopper 151, motor driving agitator motion, exports what is connected with mould bases 16 in material feeding hopper 151
Magnetic slurry pipeline transport pipeline is provided with material-pulling device, and material-pulling device is provided with high-power delivery pump.
Embodiment 6
A kind of method of work of float type liquid press, its step are：
A, build embodiment 5 described in a kind of float type liquid press, in hydraulic system preset mould cavity pressure size and
The position of piston 8；
B, feeding：Motor drives agitator to stir magnetic slurry, material feeding hopper in the material feeding hopper 151 in material injecting device
151 inject magnetic material by magnetic material conveyance conduit into the die cavity of mould bases 16；
C, high pressure sealing is suppressed：Pumping plant 91 drives upper piston 83 to move down by charging device 93, and upper piston 83 moves down
Magnetizer is promoted to move down, magnetizer bottom promotes top mold frame 161 to move down matched moulds, by the superfluous water in magnetic slurry in die cavity
Divide and extrude, moisture is emitted by the filter opening in top mold frame 161；
D, magnetize：Magnetizer magnetizes to magnetic material while compacting, and hydraulic control system is logical to line bag 131
After electricity, the body 132 that magnetizes arrangement magnetic, to product magnetizing while compacting；
E, compensation control：In pressing process, the real-time pressure in die cavity is delivered to liquid by the pressure sensor in die cavity
Pressure control system, for hydraulic control system compared with preset pressure, the encoder in piston 8 is continuous by the position signalling of piston 8
Hydraulic control system is transferred to, hydraulic control system is compared with the default position of piston 8, when the pressure that pressure sensor detects
With the position signalling that encoder detects it is identical with the position size of preset pressure and piston 8 respectively when, hydraulic control system to
Piston 8 sends instruction, stops applying driving force to piston 8, and piston 8 continues to move compacted products because cushion stroke error be present,
Because having contemplated that the part at the position of preset pressure and piston 8, so, compensating action is just played, offsets the cushion stroke
Formed product error caused by error, lower mold holder 162 are influenceed to taper off displacement by the cushion stroke error of piston 8；
F, base is taken：By in the transferred product of shaping to belt conveyor 10.
Schematically the present invention and embodiments thereof are described above, this describes no restricted, institute in accompanying drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited thereto.So if common skill of this area
Art personnel are enlightened by it, without departing from the spirit of the invention, without designing and the technical scheme for creativeness
Similar frame mode and embodiment, protection scope of the present invention all should be belonged to.
Claims (10)
1. a kind of float type liquid press, including the mould bases (16) in fuselage (1), piston (8) are located at mould bases (16) bottom, mould
It is magnetizer at the top of frame (16), is upper piston (83) at the top of magnetizer, it is characterised in that also including material injecting device, material feeding
Material-pulling device is provided with device, material-pulling device connects with material feeding hopper (151), and material feeding hopper (151) outlet connects with mould bases (16)
It is logical；
Also include encoder, pressure sensor and hydraulic system, encoder is located in piston (8), and pressure sensor is located at mould bases
(16) in die cavity, encoder and pressure sensor are connected with hydraulic system, and hydraulic system is connected with lower oil cylinder (82), lower oil
Cylinder (82) driving piston (8).
2. a kind of float type liquid press according to claim 1, it is characterised in that described mould bases (16) includes top mold frame
(161) be and lower mold holder (162), die cavity between top mold frame (161) and lower mold holder (162), piston (8) with lower mold holder (162) even
Connect, piston (8) bottom is lower oil cylinder (82), and material feeding hopper (151) outlet connects with the die cavity of mould bases (16).
3. a kind of float type liquid press according to claim 1, it is characterised in that also including pumping plant (91), charging device
(92) it is located at pipeline (93), pumping plant (91) on ground level, beside fuselage (1), pumping plant (91) is filled by pipeline (93) and topping up
(92) connection is put, charging device (92) is connected with upper piston (83), and pumping plant (91) is connected with hydraulic control system.
4. a kind of float type liquid press according to claim 1, it is characterised in that also including paper winding device, described volume
Paper device includes coil paper (141) and two pairs of disk rollers, is respectively equipped with a pair of disk rollers on fuselage both sides, on the excircle of each pair disk roller
Under it is tangent, the phase tangent line of two pairs of disk rollers is on the same line, and higher than horizontal plane where belt conveyor (10), coil paper (141)
On the phase tangent line of two pairs of disk rollers.
A kind of 5. float type liquid press according to claim 1, it is characterised in that：Described piston (8) and mould bases (16)
Sealed bottom connects, and sealing structure is the combination of Archimedian screw sealing and labyrinth seal, and Archimedian screw sealing is located at
Labyrinth seal top.
A kind of 6. float type liquid press according to claim 5, it is characterised in that：The Archimedian screw is sealed from upper
Include V-shaped seal ring (41), spiral sealing ring (4), spacer (5), V-shaped seal ring (41) and positioning sleeve (3), V-type successively under
The inner headed face of sealing ring (41), positioning sleeve (3) and spacer (5) is connected with piston (8) close-fit, periphery and mould bases (16) bottom
Portion connects, and the bottom of positioning sleeve (3) is labyrinth seal.
A kind of 7. float type liquid press according to claim 6, it is characterised in that：Described mould bases (16) includes top mold frame
(161) be and lower mold holder (162), die cavity between top mold frame (161) and lower mold holder (162), piston (8) with lower mold holder (162) even
Connect, piston (8) bottom is lower oil cylinder (82), and material feeding hopper (151) outlet connects with the die cavity of mould bases (16).
8. a kind of float type liquid press according to claim 1, it is characterised in that described magnetizer includes the body that magnetizes
(132), line bag (131) and line bag fixing device (133), the described body that magnetizes (132) wind wired bag (131), and magnetize body
(132) it is respectively positioned on line bag (131) on line bag fixing device (133).
9. a kind of float type liquid press according to claim 1, it is characterised in that described material injecting device also includes material feeding
Hopper (151), agitator and motor, agitator are located in material feeding hopper (151), and motor is erected above material feeding hopper (151),
Motor driving agitator motion, is provided with the magnetic slurry pipeline transport pipeline that material feeding hopper (151) outlet connects with mould bases (16)
Material-pulling device, material-pulling device are provided with high-power delivery pump.
A kind of 10. method of work of float type liquid press, it is characterised in that：
A, a kind of float type liquid press described in structure power 1-9 any one, presets mould cavity pressure size in hydraulic system
With piston (8) position；
B, feeding：Motor drives agitator to stir magnetic slurry, material feeding hopper in the material feeding hopper (151) in material injecting device
(151) magnetic material is injected into the die cavity of mould bases (16) by magnetic material conveyance conduit；
C, high pressure sealing is suppressed：Pumping plant (91) drives upper piston (83) to move down by charging device (93), upper piston (83)
Move down and promote magnetizer to move down, magnetizer bottom promotes top mold frame (161) to move down matched moulds, by magnetic slurry in die cavity
Excessive moisture is extruded, and moisture is emitted by the filter opening in top mold frame (161)；
D, magnetize：Magnetizer magnetizes to magnetic material while compacting, and hydraulic control system is powered to line bag (131)
Afterwards, the body (132) that magnetizes arrangement magnetic, to product magnetizing while compacting；
E, compensation control：In pressing process, the real-time pressure in die cavity is delivered to hydraulic pressure control by the pressure sensor in die cavity
System processed, for hydraulic control system compared with preset pressure, the encoder in piston (8) is continuous by the position signalling of piston (8)
Hydraulic control system is transferred to, hydraulic control system is compared with default piston (8) position, when the pressure that pressure sensor detects
When the position signalling that power and encoder detect is identical with the position size of preset pressure and piston (8) respectively, hydraulic control system
Unite and send instruction to piston (8), stop applying driving force to piston (8)；
F, base is taken：By in the transferred product of shaping to belt conveyor (10).
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| CN201710774197.8A CN107351223A (en) | 2017-08-31 | 2017-08-31 | A kind of float type liquid press and its method of work |
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Cited By (1)
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Application publication date: 20171117 |