CN104826985A - Dorma gating manufacturing process - Google Patents
Dorma gating manufacturing process Download PDFInfo
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- CN104826985A CN104826985A CN201510170769.2A CN201510170769A CN104826985A CN 104826985 A CN104826985 A CN 104826985A CN 201510170769 A CN201510170769 A CN 201510170769A CN 104826985 A CN104826985 A CN 104826985A
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Abstract
The invention relates to a Dorma gating manufacturing process, which comprises steps of: melting 300-800Kg of pig iron, 2300-2600Kg of, steel scrap 2100-2900Kg of foundry returns, 20-60Kg of silicon carbide, 50-100Kg of carburant, 25-40Kg of ferrosilicon, 0-15Kg of ferromanganese, 2-7Kg of iron sulfide and 20-30Kg of copper in a smelting furnace at a furnace burden temperature lower than 1550 DEG C for 60 +/-20 min; mixing sand; modeling; casting; opening box; blasting; polishing; and checking and loading. The process provided by the invention has high production efficiency, and the manufactured product ahs good quality.
Description
Technical field
The invention belongs to machine casting parts machining field, be specifically related to a kind of many agates gate control fabrication technique.
Background technology
At present, many agates gate is more complicated in concrete manufacturing process, also there is production efficiency low simultaneously, and can not non-stop run continuously, the product cast(ing) surface produced is not due to clean, scab, there is the defects such as overlap, therefore yield rate is not high in process of production, does not meet actual operation requirements.
Summary of the invention
Goal of the invention: the object of the invention is, in order to overcome deficiency of the prior art, to provide a kind of production efficiency high, many agates gate control fabrication technique of good product quality.
Technical scheme: in order to solve the problems of the technologies described above, one many agates gate control fabrication technique of the present invention, it comprises the following steps,
(1) melting: the copper of the ferromanganese of the ferrosilicon of the carburant of the carborundum of the foundry returns of the steel scrap of the pig iron of 300-800Kg, 2300-2600Kg, 2100-2900Kg, 20-60Kg, 50-100Kg, 25-40Kg, 0-15Kg, the iron sulfide of 2-7Kg and 20-30Kg is added smelting furnace, in stove, melt 60 ± 20min, charge-temperature controls below 1550 DEG C;
(2) mulling: mixed by the fresh sand of the coal dust of the bentonite of the old sand of 1500 ± 100Kg or 1900 ± 100Kg, 0-25Kg, 0-14Kg, the starch of 0-1Kg and 0-95Kg, mulling time controling is between 130 ± 30s;
(3) moulding: be blown in the moulding room of moulding machine by the molding sand in step (2), after the extruding by the positive counter of many agates gate mould, becomes sand mold;
(4) pour into a mould: melted liquation in step (1) is poured in the sand mold in step (3), pouring temperature controls between 1380-1430+15 DEG C, specifically molten iron is full of cup in 2-4s, then evenly sand mold is injected, in maintenance cup, liquid level is slightly lower than upper edge, finally be full of sand mold, be full of and do not diffuse out cup;
(5) unpack: wait for 40-60min after cast, temperature of unpacking is between 100-300 DEG C;
(6) ball blast: working time 7-19min, magnitude of current 45-65A;
(7) polish: ensure ingate residual quantity < 1.0mm;
(8) checking vanning: cast(ing) surface is clean, without scabbing overlap, not allowed scab.
In described step (1), the weight sum of each material is 5500Kg.
Many agates gate mould in described step (3) comprises pressing plate, it is divided into pressure plate and counter, on described pressing plate, correspondence arranges module, rising head is provided with on the top of described module, cup is provided with in described pressing plate upper middle position, cross gate is provided with below cup in described counter, sprue is provided with between two modules on the pressure plate that described cross gate two ends are corresponding, described sprue bottom is connected with the module of both sides, is provided with anti-striker in described pressing plate both upper ends thereof.
In described step (2), the fresh sand of the coal dust of the bentonite of the old sand of 1500 ± 100Kg, 10-25Kg, 0-14Kg, the starch of 0-1Kg and 0-75Kg is mixed.
In described step (2), the fresh sand of the coal dust of the bentonite of the old sand of 1500 ± 100Kg, 0-25Kg, 0-8Kg, the starch of 0-1Kg and 0-75Kg is mixed
In described step (2), the fresh sand of the coal dust of the bentonite of the old sand of 1900 ± 100Kg, 0-25Kg, 0-14Kg, the starch of 0-1Kg and 0-95Kg is mixed.
In the present invention, need receiving inspection, specific targets are as follows:
1, the pig iron:
Chemical composition requires:
C >=3.3%, with crowd deviation < 0.4%;
Z18Si＞1.6-2.0％；
Z14Si＞1.25-1.6％；
Mn≤0.9％；
P≤0.1％；
S≤0.05％；
Ti＜0.07％。
The appearance requirement of this product:
Without serious corrosion and greasy dirt, must not mix in the different trade mark with batch pig iron, comprise different groups, batch pig iron not at the same level.
2, steel scrap:
Chemical composition requires:
C≤1.0%, with crowd deviation < 0.25%;
S≤0.06％；
Si≤0.45％；
Mn≤1.8％；
P≤0.06％；
Cr≤0.2％；
Al≤0.1％；
Other trace element adds up to≤1%.
Appearance requirement:
Bulk or strip, do not allowed closed tube, thickness 3-65mm, length < 300mm, thickness < 3mm is no more than 10%.
3, casting silica sand
Granularity requirements:
AFS:54-60,50/100 silica sand four sieves concentration degree > 90%, and 140 mesh sieve margin sand are no more than 12%, and 200 mesh sieve margin sand are no more than 2%;
Water content: < 0.3%;
Clay content: < 0.5%;
SiO
2content: > 90%.
Kind, mineral resources: washing or scouring silica sand.
4, ferrosilicon:
Chemical composition requires:
Si＞72％；
Mn＜0.5％；
Cr＜0.5％；
Al＜2.0％。
Appearance requirement:
Bulk, size 20-80mm, below 20mm < 10% (note: below 20mm should be graininess, can not contain Powdered).
4, ferromanganese
Chemical composition requires:
Mn65％-82％；
C6％-8％；
Si≤4.5％；
P≤0.4％；
S≤0.03％。
Appearance requirement:
Block < 20kg, 20 × below 20mm fritter < 10%.
5, carburant
Component requirements:
Phosphorus content > 95%;
Nitrogen content < 200PPM;
Ash≤0.8%;
Fugitive constituent≤0.5%;
Sulfur≤0.5%.
Granularity requirements:
Granularity 1-5mm.
The present invention, in fusion process, closed tube, is seriously got rusty and is contained the furnace charge of water oil, and forbid directly to add in stove, furnace charge will add in time, avoid as far as possible melting down in stove after reinforced again time molten iron splash out.Before blow-on, by equipment point-detecting requirement, check water-cooling system, hydraulic pressure tilting system, ground connection let out electric protection etc., confirm without exception after, then the melting that is energized, cold when opening molten, use be equipped with open frit, progressively increased wattage, prevent damage furnace lining and occur potential safety hazard.During melting, low-power melting should be adopted when not catching up with if reinforced, avoid molten iron temperature too high and be oxidized, during melting, if the dirtier slag that causes of furnace charge is too many, slagging-off number of times should be increased, avoid metal " bridging ", during melting, molten iron too not full (being less than about fire door 300mm) in stove, so that add furnace charge to adjust hot metal composition, every stove fusing time is generally no more than 1.5 hours.In melting, its component target must control, table specific as follows,
The temperature of melting iron, generally be no more than 1550 DEG C, when first packet or the long-time rear recovery that pauses are poured into a mould, molten iron temperature in stove is adjusted in time according to the pouring temperature that casting machine place feeds back, ensure that pouring temperature meets the requirements, according to charger sheet requirement, weigh alloy, alloy is not disposable to add, in order to avoid composition exceeds, measures the content of carbon with carbon silicon instrument, if more than having deviation 3-5 to put with desired value, add steel scrap or carburant adjustment, after carbon content meets target call, then get test piece spectrometer and detect hot metal composition.If alloy content and desired value variant, add in stove after weighing.Alloy adds fashionable will intensification and fully melts, absorb, ensure that in stove, hot metal composition is even, and then sample analysis, until hot metal composition meets desired value, before tapping a blast furnace, bits in stove are taken off totally, temperature is raised to tapping temperature, insulation, prepare molten iron discharging, if cast iron quality change or melting terminate, should to turn molten iron in stove, add alloy adjustment hot metal composition, the record of alloy addition should be carried out, measure tapping temperature, should make a record, electric furnace face tap a blast furnace before could inovulant be added in ladle, innoculant adding quantity is generally the 0.3-0.4% of iron water amount, addition should be avoided not enough or a large amount of, innoculant adding quantity should make a record, when particularly addition changes, before turndown molten iron discharging, confirm that the hasp of ladle locks, prevent molten iron from toppling over out, during turndown molten iron discharging, fire door is aimed at and to be fallen molten iron after ladle again, hydraulic system is damaged under preventing molten iron to be splashed to furnace bottom, meter ladle or weighing should be adopted when tapping a blast furnace, the suitable < 20 kilograms of deviation of weight, note the addition of inovulant simultaneously, should skim before tapping a blast furnace, molten iron could be sent to pouring furnace, ladle is finished down clad insulation on molten iron bonnet, after turndown pours out an iron clad water, recover body of heater to upright position, shut bell, timely closedown oil pump.
The present invention is in mulling process, and molding sand, without the foreign material such as cigarette end, packaging bag, disposes loam core and little iron block, the moisture of old sand, the old sand moisture entering puddle mixer can only be more lower slightly than blending together sand, first adds old sand and water, add bentonite, coal dust and starch etc. again, raw-material addition is as following table
Moulding-sand property detects and controls as following table,
The present invention is in modeling process, start necessary checkout facility, protection system can normally work, and fill spot check table, check the integrity of mould, and about preheated mold to 50 ± 10 DEG C, heat time > 30 minutes, check releasing agent adding apparatus, and be confirmed whether to need to add releasing agent, the sand lump above the steel bar and clamping plate getting rid of transfer mechanism or scab should be cleared up before moulding machine start, and two sand lumps of clamping plate seam crossing, prevent because scab causes casting deformation, open electric-control system, select Light Condition, without penetrating pressure and extruding program, before starting production, allow moulding machine no-load running within 20-30 minute, carry out being warmed to normal operating conditions.Moulding, whether setting and the production model of inspection VDU machine be consistent, selects normal operating, start sand mold to produce, at each kind moulding initial stage, when moulder need check mould assembly, whether have impingement phenomenon, modeling parameters is adjusted in time, preparation sand mold string 15 type if any abnormal.Measure sand hardness, hardness is greater than 90, and same sand mold die joint hardness deviation is less than 5.Observe sand mold molding and defeated type situation simultaneously, modeling parameters is adjusted as the case may be in processing range, instantaneous display compression ratio 23 ± 2%, production line pauses after more than 30 minutes, remain with in sand hopper sand mold that molding sand is made when resuming production, and perform mark, notice pouring practice person does not pour into a mould these sand molds, note observing moulding situation (per half an hour once), find sticking to mould, die cavity is soft or sand is damp, when sand is done and is waited abnormal, take measures in time or report to leader on duty, prevent batch waste product, after counter opens upset, check whether counter cup empty cavity position moulding room top board has the thin sand of one deck, if there is this phenomenon to stop immediately producing, change other mould to produce, if molding operation work is difficult to judge, should notification technique section personnel judge in time, determine whether proceed to produce, this inspection can be carried out with molding sand inspection simultaneously, when moulding compacting ratio is undergone mutation, check mould, sand mold, perform and identify and notify that pouring gang is not poured into a mould, every shutdown inspection moulding half an hour situation, timely eliminating scab and die cavity defect, the situations such as hardness is irregular.
The present invention is in casting process, check leak, stopper rod and device for adding inoculant etc., inovulant will be placed on pouring furnace and toast use after 24 hours, after cold bag or casting ladle turned letter molten iron a period of time (more than 20 minutes) cool, toast casting ladle and stopper rod head, toast at least 90 minutes when ensureing pouring ladle red heat preheating, burner is cleared up and keeps in time after using, pour into a mould by the pouring temperature of casting pouring technological requirement, the duration of pouring and pregnant amount, casting process is: molten iron was full of cup fast before this within 2-4 second, then be evenly inject sand mold, to maintain in cup liquid level slightly lower than on edge, finally be full of sand mold, be full of and do not diffuse out cup, every iron clad water enters pouring furnace measuring tempeature once, and record, every iron clad water cast later stage increases measuring tempeature once, and record, innoculant adding quantity is set and weighs, calibrate (conventional: 2 days/time, special circumstances class/1 time), record, skim once after every iron clad water enters pouring furnace, molten iron temperature lower than end temperature time stop cast, when iron water amount is more (as being greater than 450-500 ㎏) turn over bag and refund electric furnace, time less, casting machine is shifted out, about every 1 minute puts molten iron, prevent stopper rod and leak from freezing, until supplementary 1540-1550 DEG C high temperature liquid iron and thermometric qualified after pour into a mould again, be notified, cast is stopped when hot metal composition need adjust, cast is started again when electric furnace mixes up composition and allows, notice during cast that observing inovulant adds situation, blockage is bred in discovery, depart from or pregnant amount does not meet time stop immediately cast, pour into a mould again after quick eliminating, change stopper rod on time, timely adjustment stopper rod, cleaning leak, molten iron is avoided to become thread shape or water clock shape to enter casting mold to be cast, when sand mold moves, if continuing to occur a upper type not solidified molten iron shakes into next type sand mold to be cast, pour into a mould again after adjusting, do not pour into a mould the sand mold to be cast shaken into molten iron, when stopping watering recovery cast in more than 2 minutes, can to stopping watering a small amount of (about 0.2Kg) iron liquid of cast in 2 sand molds near the sand mold of front just cast, or 2 sand molds do not poured into a mould near the sand mold just poured into a mould before stopping watering, must not exceed schedule time duration of pouring of every iron clad water (being poured into before next bag pours into from this iron clad water), otherwise turn over bag and refund electric furnace.
Beneficial effect: compared with prior art, its remarkable advantage is: the present invention controls rigorous, and production efficiency is high, good product quality in the present invention, realistic instructions for use.
Accompanying drawing explanation
Fig. 1 is the structural representation of the positive and negative mould of the gate of many agates described in the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further illustrated.
Embodiment 1:
As shown in Figure 1, one many agates gate control fabrication technique of the present invention, it comprises the following steps,
(1) melting: the copper of the ferromanganese of the ferrosilicon of the carburant of the carborundum of the foundry returns of the steel scrap of the pig iron of 400Kg, 2500Kg, 2400Kg, 40Kg, 95Kg, 30Kg, 7Kg, the iron sulfide of 3Kg and 25Kg is added smelting furnace, in stove, melt 50min, charge-temperature controls at 1540 DEG C;
(2) mulling: 231 lines, when just mixing, mixes the fresh sand of the bentonite of the old sand of 1400Kg, 10Kg, 10Kg, and when mixing eventually, mixed by the starch of the coal dust of the bentonite of 4Kg, 4Kg, 0.2Kg, mulling time controling is at 110s;
2013 lines, mixed by the fresh sand of the coal dust of the bentonite of the old sand of 1400Kg, 5Kg, 1Kg, the starch of 0.2Kg and 15Kg, mulling time controling is at 110s;
230 lines, mixed by the fresh sand of the coal dust of the bentonite of the old sand of 1800Kg, 6Kg, 1Kg, the starch of 0.2Kg and 15Kg, mulling time controling is at 110s;
(3) moulding: be blown in the moulding room of moulding machine by the molding sand in step (2), after the extruding by the positive counter of many agates gate mould, becomes sand mold;
(4) pour into a mould: melted liquation in step (1) is poured in the sand mold in step (3), pouring temperature controls at 1430 DEG C, specifically molten iron is full of cup in 2s, then evenly sand mold is injected, in maintenance cup, liquid level is slightly lower than upper edge, finally be full of sand mold, be full of and do not diffuse out cup;
(5) unpack: wait for 40min after cast, temperature of unpacking is at 150 DEG C;
(6) ball blast: working time 10min, magnitude of current 50A;
(7) polish: ensure ingate residual quantity < 1.0mm;
(8) checking vanning: cast(ing) surface is clean, without scabbing overlap, not allowed scab.
Many agates gate mould in described step (3) comprises pressing plate, it is divided into pressure plate 1 and counter 2, on described pressing plate, correspondence arranges module 3, rising head 4 is provided with on the top of described module 3, cup 5 is provided with in described pressing plate upper middle position, cross gate 6 is provided with below cup 5 in described counter 2, sprue 7 is provided with between two modules 3 on the pressure plate 1 that described cross gate 6 two ends are corresponding, described sprue 7 bottom is connected with the module 1 of both sides, is provided with anti-striker 8 in described pressing plate both upper ends thereof.
Embodiment 2:
As shown in Figure 1, one many agates gate control fabrication technique of the present invention, it comprises the following steps,
(1) melting: the copper of the ferromanganese of the ferrosilicon of the carburant of the carborundum of the foundry returns of the steel scrap of the pig iron of 600Kg, 24000Kg, 2300Kg, 50Kg, 80Kg, 30Kg, 11Kg, the iron sulfide of 4Kg and 25Kg is added smelting furnace, in stove, melt 60min, charge-temperature controls at 1520 DEG C;
(2) mulling: 231 lines, when just mixing, mixes the fresh sand of the bentonite of the old sand of 1500Kg, 11Kg, 20Kg, and when mixing eventually, mixed by the starch of the coal dust of the bentonite of 6Kg, 5Kg, 0.3Kg, mulling time controling is at 130s;
2013 lines, mixed by the fresh sand of the coal dust of the bentonite of the old sand of 1500Kg, 15Kg, 4Kg, the starch of 0.5Kg and 25Kg, mulling time controling is at 130s;
230 lines, mixed by the fresh sand of the coal dust of the bentonite of the old sand of 1900Kg, 16Kg, 5Kg, the starch of 0.4Kg and 30Kg, mulling time controling is at 130s;
(3) moulding: be blown in the moulding room of moulding machine by the molding sand in step (2), after the extruding by the positive counter of many agates gate mould, becomes sand mold;
(4) pour into a mould: melted liquation in step (1) is poured in the sand mold in step (3), pouring temperature controls at 1435 DEG C, specifically molten iron is full of cup in 3s, then evenly sand mold is injected, in maintenance cup, liquid level is slightly lower than upper edge, finally be full of sand mold, be full of and do not diffuse out cup;
(5) unpack: wait for 50min after cast, temperature of unpacking is at 200 DEG C;
(6) ball blast: working time 12min, magnitude of current 55A;
(7) polish: ensure ingate residual quantity < 1.0mm;
(8) checking vanning: cast(ing) surface is clean, without scabbing overlap, not allowed scab.
Many agates gate mould in described step (3) comprises pressing plate, it is divided into pressure plate 1 and counter 2, on described pressing plate, correspondence arranges module 3, rising head 4 is provided with on the top of described module 3, cup 5 is provided with in described pressing plate upper middle position, cross gate 6 is provided with below cup 5 in described counter 2, sprue 7 is provided with between two modules 3 on the pressure plate 1 that described cross gate 6 two ends are corresponding, described sprue 7 bottom is connected with the module 1 of both sides, is provided with anti-striker 8 in described pressing plate both upper ends thereof.
Embodiment 3:
As shown in Figure 1, one many agates gate control fabrication technique of the present invention, it comprises the following steps,
(1) melting: the copper of the ferromanganese of the ferrosilicon of the carburant of the carborundum of the foundry returns of the steel scrap of the pig iron of 500Kg, 2500Kg, 2300Kg, 30Kg, 90Kg, 35Kg, 14Kg, the iron sulfide of 6Kg and 25Kg is added smelting furnace, in stove, melt 55min, charge-temperature controls at 1510 DEG C;
(2) mulling: 231 lines, when just mixing, mixes the fresh sand of the bentonite of the old sand of 1600Kg, 12Kg, 40Kg, and when mixing eventually, mixed by the starch of the coal dust of the bentonite of 10Kg, 8Kg, 0.7Kg, mulling time controling is at 150s;
2013 lines, mixed by the fresh sand of the coal dust of the bentonite of the old sand of 1600Kg, 20Kg, 6Kg, the starch of 0.7Kg and 55Kg, mulling time controling is at 150s;
230 lines, mixed by the fresh sand of the coal dust of the bentonite of the old sand of 2000Kg, 21Kg, 7Kg, the starch of 0.6Kg and 60Kg, mulling time controling is at 150s;
(3) moulding: be blown in the moulding room of moulding machine by the molding sand in step (2), after the extruding by the positive counter of many agates gate mould, becomes sand mold;
(4) pour into a mould: melted liquation in step (1) is poured in the sand mold in step (3), pouring temperature controls at 1440 DEG C, specifically molten iron is full of cup in 4s, then evenly sand mold is injected, in maintenance cup, liquid level is slightly lower than upper edge, finally be full of sand mold, be full of and do not diffuse out cup;
(5) unpack: wait for 55min after cast, temperature of unpacking is at 260 DEG C;
(6) ball blast: working time 18min, magnitude of current 60A;
(7) polish: ensure ingate residual quantity < 1.0mm;
(8) checking vanning: cast(ing) surface is clean, without scabbing overlap, not allowed scab.
Many agates gate mould in described step (3) comprises pressing plate, it is divided into pressure plate 1 and counter 2, on described pressing plate, correspondence arranges module 3, rising head 4 is provided with on the top of described module 3, cup 5 is provided with in described pressing plate upper middle position, cross gate 6 is provided with below cup 5 in described counter 2, sprue 7 is provided with between two modules 3 on the pressure plate 1 that described cross gate 6 two ends are corresponding, described sprue 7 bottom is connected with the module 1 of both sides, is provided with anti-striker 8 in described pressing plate both upper ends thereof.
The invention provides a kind of thinking and method; the method and access of this technical scheme of specific implementation is a lot; the above is only the preferred embodiment of the present invention; should be understood that; for those skilled in the art, under the premise without departing from the principles of the invention, some improvements and modifications can also be made; these improvements and modifications also should be considered as protection scope of the present invention, and all available prior art of each part not clear and definite in the present embodiment is realized.
Claims (6)
1. the gate control of agate a more than fabrication technique, is characterized in that: it comprises the following steps,
(1) melting: the copper of the ferromanganese of the ferrosilicon of the carburant of the carborundum of the foundry returns of the steel scrap of the pig iron of 300-800Kg, 2300-2600Kg, 2100-2900Kg, 20-60Kg, 50-100Kg, 25-40Kg, 0-15Kg, the iron sulfide of 2-7Kg and 20-30Kg is added smelting furnace, in stove, melt 60 ± 20min, charge-temperature controls below 1550 DEG C;
(2) mulling: mixed by the fresh sand of the coal dust of the bentonite of the old sand of 1500 ± 100Kg or 1900 ± 100Kg, 0-25Kg, 0-14Kg, the starch of 0-1Kg and 0-95Kg, mulling time controling is between 130 ± 30s;
(3) moulding: be blown in the moulding room of moulding machine by the molding sand in step (2), after the extruding by the positive counter of many agates gate mould, becomes sand mold;
(4) pour into a mould: melted liquation in step (1) is poured in the sand mold in step (3), pouring temperature controls between 1380-1430+15 DEG C, specifically molten iron is full of cup in 2-4s, then evenly sand mold is injected, in maintenance cup, liquid level is slightly lower than upper edge, finally be full of sand mold, be full of and do not diffuse out cup;
(5) unpack: wait for 40-60min after cast, temperature of unpacking is between 100-300 DEG C;
(6) ball blast: working time 7-19min, magnitude of current 45-65A;
(7) polish: ensure ingate residual quantity < 1.0mm;
(8) checking vanning: cast(ing) surface is clean, without scabbing overlap, not allowed scab.
2. many agates gate control fabrication technique according to claim 1, is characterized in that: in described step (1), the weight sum of each material is 5500Kg.
3. many agates gate control fabrication technique according to claim 1, it is characterized in that: the many agates gate mould in described step (3) comprises pressing plate, it is divided into pressure plate (1) and counter (2), on described pressing plate, correspondence arranges module (3), rising head (4) is provided with on the top of described module (3), cup (5) is provided with in described pressing plate upper middle position, cup (5) below in described counter (2) is provided with cross gate (6), sprue (7) is provided with between two modules (3) on the pressure plate (1) that described cross gate (6) two ends are corresponding, described sprue (7) bottom is connected with the module (1) of both sides, anti-striker (8) is provided with in described pressing plate both upper ends thereof.
4. many agates gate control fabrication technique according to claim 1, is characterized in that: in described step (2), is mixed by the fresh sand of the coal dust of the bentonite of the old sand of 1500 ± 100Kg, 10-25Kg, 0-14Kg, the starch of 0-1Kg and 0-75Kg.
5. many agates gate control fabrication technique according to claim 1, is characterized in that: in described step (2), is mixed by the fresh sand of the coal dust of the bentonite of the old sand of 1500 ± 100Kg, 0-25Kg, 0-8Kg, the starch of 0-1Kg and 0-75Kg
6. many agates gate control fabrication technique according to claim 1, is characterized in that: in described step (2), is mixed by the fresh sand of the coal dust of the bentonite of the old sand of 1900 ± 100Kg, 0-25Kg, 0-14Kg, the starch of 0-1Kg and 0-95Kg.
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| CN106636874A (en) * | 2016-12-22 | 2017-05-10 | 浙江品川精密机械有限公司 | Machine tool cast iron and preparing method thereof |
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| CN110479951A (en) * | 2019-08-29 | 2019-11-22 | 赤峰市建支管业有限公司 | A kind of malleable cast iron pipe fitting casting green sand core molding sand |
| CN110724870A (en) * | 2019-11-20 | 2020-01-24 | 如东县丰利机械厂有限公司 | High-strength stainless steel dumbbell and processing technology thereof |
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| CN103341589A (en) * | 2013-07-02 | 2013-10-09 | 上海圣德曼铸造有限公司 | Sand mixing process for molding clay green sand |
| CN203992261U (en) * | 2014-08-29 | 2014-12-10 | 江苏凌特精密机械有限公司 | A kind of novel slim cylinder mold |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105195677A (en) * | 2015-11-09 | 2015-12-30 | 江苏恒立高压油缸股份有限公司 | Casting mold external member capable of improving quality and technological yield of end cover casting of high-pressure oil cylinder |
| CN106636874A (en) * | 2016-12-22 | 2017-05-10 | 浙江品川精密机械有限公司 | Machine tool cast iron and preparing method thereof |
| CN106903267A (en) * | 2017-03-23 | 2017-06-30 | 江苏凌特精密机械有限公司 | A kind of mould for improving brake disc yield rate |
| CN110479951A (en) * | 2019-08-29 | 2019-11-22 | 赤峰市建支管业有限公司 | A kind of malleable cast iron pipe fitting casting green sand core molding sand |
| CN110724870A (en) * | 2019-11-20 | 2020-01-24 | 如东县丰利机械厂有限公司 | High-strength stainless steel dumbbell and processing technology thereof |
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