CN201357209Y - Mold for circular truncated cone-shaped non-uniform wall thickness casting - Google Patents
Mold for circular truncated cone-shaped non-uniform wall thickness casting Download PDFInfo
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- CN201357209Y CN201357209Y CNU200920063411XU CN200920063411U CN201357209Y CN 201357209 Y CN201357209 Y CN 201357209Y CN U200920063411X U CNU200920063411X U CN U200920063411XU CN 200920063411 U CN200920063411 U CN 200920063411U CN 201357209 Y CN201357209 Y CN 201357209Y
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Abstract
The utility model discloses a mold for circular truncated cone-shaped non-uniform wall thickness casting, one to three turns of outer cold iron (2) are arranged at the bottom of an inner mold clay core and correspond to the thickest part of the cast according to the thickest wall thickness of the cast; the inner mold clay core is provided with a lengthened cross gate (4) which has the length of three fifths of the perimeter of the cast, a riser (5) is arranged on a lug of the cast, the bottom of one side of the riser (5) is lapped on the inner radial side of an upper opening, the other side is directly patched at the position of 50mm above the root of the lug of the cast, and the riser (5) adopts a thermal insulation riser bush (3). The mold for circular truncated cone-shaped non-uniform wall thickness casting can achieve high process yield, significantly improve structure of the product, thoroughly eliminate shrinkage, loose problem and other casting defects, reduce casting difficulty, improve production efficiency, improve mechanical performance of the product and prolong service life of the product.
Description
Technical field
The utility model relates to a kind of cast casting technology mould, particularly relates to the non-homogeneous wall thickness cast casting of a kind of circular platform type technology mould.
Background technology
Cone crusher is a kind of mine common apparatus, has been widely used in the mineral broken process, and it is big to have an output, and the ratio of reduction is big, and fragmentation such as surmises evenly at plurality of advantages.In recent years, along with mining industry and rubble system sand already develop rapidly, cone crusher has obtained using more widely.The basic principle of cone crusher broken material utilizes eccentric shaft to drive broken component---broken wall exactly, and material is pressed to fixed broken component---rolled mortar wall, with grinding pressure material is pulverized and discharges body then.The circular cone machine is also consuming the broken rib of broken component, rolled mortar wall in broken material.As the broken wall of consumable accessory, the quality of the quality of rolled mortar wall will determine the normality of producing and the height of production cost to a great extent.
The broken wall of cone crusher, rolled mortar wall adopts the potassium steel casting.The tapered foundry goods of its normally a kind of open circles, upward young and thin, end opening is big and thick, and between 2.5～5 times, laterally wall thickness is even usually for the ratio of last lower wall thickness.The product end opening is the groundwork position, is the worn area of product, and 4～8 fixedly suspension hooks are wherein arranged on the rolled mortar wall outer wall usually.Existing casting technique adopts following dual mode usually:
First kind: product greatly head-up, bottom filling consecutive solidification casting technique.As Fig. 1:
1, the basic characteristics of technology: adopt two casees, divide the pattern moulding up and down, rising head and running gate system all concentrate on the loam core.Limited production adopts sweeping usually, produces in batches and adopts the full mold core box.Molding sand can be the clay-bonded sand dry type, the fast dry sand of waterglass, also usable resins sand mold.When molten steel was full of die cavity to riser height 2/3, the dead head of changing the time was in order to the foundry goods consecutive solidification.This casting technique biggest advantage is exactly the consecutive solidification that can guarantee foundry goods, and rising head is placed directly in the thickest working position of product, makes product can arrive the sufficient molten steel that flows in the solidification shrinkage process and replenishes.Finally reach compact product structure, casting flaw such as no shrinkage cavity is loose.
2, the problem and the defective that in actual production, exist of this technology:
(1) product yield of product is low, and product yield exceeds 60% and just might casting flaws such as shrinkage cavity is loose occur at the rising head root usually about 60%, often causes product rejection.Some producer also adopts the casting technique of insulating riser sleeve and so in recent years, but product yield can not surpass 70%, and the reason that product yield is low is exactly that the product wall thickness is thick, and the thermal center circular diameter is big, and product is circular simultaneously, needs the distance of peace feeding.For reaching abundant feeding, just must strengthen the quantity of rising head diameter and height and rising head, finally cause the product product yield not high.
(2) rising head cleaning difficulty may have a strong impact on product quality in the scale removal process, even cause product rejection.The potassium steel product only just can carry out the rising head cutting after carrying out the tough processing of water.The rising head cutting time must be immersed in product the junction of limit burnisher dege water cooling products and rising head in the pond, prevents that product from producing the metallographic transformation because of gas cutting heats up, be transformed into hard and crisp martensitic structure.Make product feeding position the crackle of a large amount of reticular patterns occur, have a strong impact on product quality.This technological requirement rising head diameter is big, and rising head cutting workload is very big during actual the cleaning.
(3) loam core needs a large amount of arbors, and moulding preparation amount is big, and production efficiency is low, and the arbor loss is big, foundry goods shake out difficulty.Because foundry goods is the returning buckle case, the cracking that drops when preventing the loam core upset, steel cage arbor form must be adopted in the loam core.Because of broken wall, the rolled mortar wall model is a lot, and the size difference is very big, and the loam core arbor generally adopts the mode of reinforcing bar welding, and loam core of every moulding just needs core crab of weldering.Directly cause to produce and assist the amount of labour used big, the production cycle is long, and it is big to produce the occupied ground area, and production efficiency is low, and auxiliary material consumption such as reinforcing bar are big.
(4) loam core upset difficulty, the knockout difficulty.The loam core owing to need overturn during the button case requires driving lifting upset to operate steadily.Prevent thermal agitation, generally adopt the driving of twin beams double hook, have many small-sized foundry enterprises not have this ability.After the product cast, rising head shrinks and blocks top box.Cause outlet very difficult, a lot of producers adopt vibrating shakeout outlet method.The vibrating shakeout machine is a very big investment for general enterprise, so its range of application is very restricted.Have only all very rich large enterprise of equipment and fund just to adopt this kind casting technique.
Second kind: the product osculum up, external chill bottom filling solidified cast technology is simultaneously placed in the loam core, pouring technology such as Fig. 2:
1, the basic characteristics of technology, sand mold adopt two-part mo(u)lding up and down, and the riser gating system all is placed on the top box, and the sprue side is gone into bottom filling.The loam core need not upset, and direct external chill is placed in the bottom, and molten steel waters fashionable direct chilling action, reaches to prolong the end region purpose.Emit and outspokenly water that molten steel waters teeming more slowly when full, shrink required molten steel to replenish foundry goods.This kind casting technique can be welded the core arbor, needn't overturn in the loam core, and the rising head volume is little, and the product yield height is fit to medium and small foundry enterprise production.
2, the problem and the defective of this technology existence.
(1) shrinkage cavity, defective such as loose appear in foundry goods easily.Casting technique is placed on the foundry goods microcephaly with rising head, and the foundry goods microcephaly is because wall is thin, and molten steel solidification speed is fast, and it solidifies earlier for big mouthful than rising head and product, in fact is exactly the feeding passage that has cut off rising head, makes rising head can't play the feeding effect.The thick wall part of foundry goods has only by the chilling action of direct external chill and the feeding molten steel of cast gate and reaches the feeding purpose, when the cast gate teeming time falls short of, shrinkage cavity, defective, especially hanger root thermal center place such as loose will appear in foundry goods, and almost 100% exists loose problem.Even casting process is accomplished flawless, problems such as axis is loose still can appear in product.
(2) product ingate position is easily overheated, cause product grains thick, worsen the product institutional framework, problems such as product easily breaks, present many manufacturers are in actual production, and the running gate system runner gate is opened too shortly, all molten steel enter die cavity by three to four road cast gates basically, because the duration of pouring is long, causes ingate position product local grain thick, and can't be improved by heat treatment.When product in use may wear to certain thickness gradually and is can't the support product suffered outer power of work of the toughness of product, product is cracking from here just, finally develops into product quality problem.
The utility model content
Technical problem to be solved in the utility model provides a kind of product yield height, obviously improves the product institutional framework, thoroughly eliminate shrinkage cavity, casting flaw such as loose, reduce the casting difficulty, enhance productivity, improve mechanical performance of products, improve the non-homogeneous wall thickness cast casting of the circular platform type technology mould in the service life of product.
In order to solve the problems of the technologies described above, the non-homogeneous wall thickness cast casting of the circular platform type that the utility model provides technology mould, comprise internal mold loam core and rising head, be placed with one to three circle external chill according to the thick height of heavy wall of foundry goods at the thickest position of corresponding foundry goods, the bottom in described internal mold loam core; Described internal mold loam core is provided with the lengthening runner gate, the length that described internal mold loam core is provided with the lengthening runner gate is 3/5 of foundry goods girth, described rising head is arranged on above the hanger of foundry goods, the bottom, one side of described rising head rides on the internal diameter suitable for reading limit, the another side direct subsidy is got off to 50mm place, foundry goods hanger root top, and described rising head adopts insulating riser sleeve.
Described external chill is of a size of 80 * 50 * 50, and material is HT250, and described external chill is with needing to clear up foreign material such as the ironing surface scab iron rust of described external cooling, coating with sand cleaning machine before, and levels external chill (2) adopts blossom type staggered.
Adopt the non-homogeneous wall thickness cast casting of the circular platform type technology mould of technique scheme, casting technique comprises the steps:
(1), product is head-up little, somatotype up and down, external form is a top box, need not overturn in the loam core, rising head and cast gate concentrate on top box;
(2), internal mold puts external chill on the loam core, at the thickest position of corresponding foundry goods, the bottom in loam core, places one to three circle external chill according to the thick height of heavy wall of foundry goods;
(3), lengthening runner gate length is to 3/5 of product girth, opens ingate 6-8 road, tangentially enters die cavity, running gate system is a unchoked running system, molten steel can be full of die cavity rapidly, avoids occurring casting flaws such as cold shut;
(4), calculate the rising head gross weight according to product yield 80%, determine the quantity of rising head again according to the number of product lifting lugs, be that each is provided with a rising head above the hanger, rising head utilizes common waist type rising head, wide: long: high=1: 14-15: 15, the bottom, one side of rising head rides on the internal diameter suitable for reading limit, and the another side direct subsidy is got off to 50mm place, hanger root top; Rising head adopts insulating riser sleeve, lays when insulated feeder is enclosed within moulding to fix to get final product;
(5), pouring molten steel, changes from riser gating when high to rising head 1/3, simultaneously in the insulation of rising head loam cake exothermic riser coverture, molten steel water full after again teeming be no less than 2 times.
In the above-mentioned steps (2), described external chill is of a size of 80 * 50 * 50, and material is HT250, and external chill is with needing before with foreign material such as the ironing surface scab iron rust of sand cleaning machine cleaning external cooling, coating, inhomogeneous for preventing Quench, the levels external chill adopts blossom type staggered.
Adopt the non-homogeneous wall thickness cast casting of the circular platform type technology of technique scheme, adopts head-up little, the subsidy of knocking off on hanger skill, rising head adopts insulating riser sleeve, the casting technique of loam core placement external chill, this technology has the following advantages:
1, product yield height is compared with aforementioned first kind of technology, and technology is that yield rate increases substantially to 80% by 60%, has both saved molten steel, makes the maximum single-piece of company can cast tonnage again and is improved.
2, obviously improve the product institutional framework, thoroughly eliminate shrinkage cavity, casting flaw such as loose.Add the riser feeding mode of subsidy by insulated feeder, make product lifting lugs place thermal center circle be able to feeding, get through the feeding passage simultaneously, make molten steel smoothly feeding to the product bottom.
3, reduced the casting difficulty, improved production efficiency, because the loam core need not overturn, thereby deducted the work such as welding of arbor, product shake out sand removal simultaneously also is easy to, and only need hang the case foundry goods of uncapping can fall automatically, need not with the cleaning of vibrating shakeout platform.
4, improve mechanical performance of products, improved the service life of product.By prolonging runner gate length, eliminated overheated total position, it is careful that product grains is organized, product tensile strength, percentage elongation etc. are greatly improved, the product wearing and tearing evenly local dent or cracking phenomena do not occur in actual use, are significantly improved service time simultaneously.
In sum, the utility model is a kind of product yield height, obviously improves the product institutional framework, thoroughly eliminate shrinkage cavity, casting flaw such as loose, reduce the casting difficulty, enhance productivity, improve mechanical performance of products, improve the non-homogeneous wall thickness cast casting of the circular platform type technology mould in the service life of product.
Description of drawings
Fig. 1 be original product greatly head-up, bottom filling consecutive solidification casting technique schematic diagram;
Fig. 2 be original product osculum up, external chill bottom filling solidified cast process schematic representation is simultaneously placed in the loam core;
Fig. 3 is the utility model casting technique schematic diagram;
Fig. 4 is the breaker mortar rolled wall casting technique of Φ 2200 a standard round bevel-types sketch;
Fig. 5 is Xi Mengsi 14 circular cone machine rolled mortar wall pouring technology sketches;
Fig. 6 is that S155D circular cone machine rolled mortar wall pouring technology sketch is raised by China.
The specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Referring to Fig. 3, at the thickest position of corresponding foundry goods, the bottom in loam core, place one to three circle external chill 2 according to the thick height of the heavy wall of foundry goods, external chill 2 is of a size of 80 * 50 * 50, material is HT250, need scab iron rust before external chill 2 usefulness with sand cleaning machine cleaning external chill 2 surfaces, foreign material such as coating, inhomogeneous for preventing Quench, levels external chill 2 adopts blossom type staggered, lengthening runner gate 4 length are to 3/5 of product girth, open ingate 6-8 road, tangentially enter die cavity, each is provided with a feeding head above the hanger, the bottom, one side of rising head 5 rides on the internal diameter suitable for reading limit, the another side direct subsidy is got off to hanger root top 50mm place, rising head employing insulating riser sleeve 3, and material is that flue dust has another name called and floats pearl.
Referring to Fig. 3, its concrete characteristics and production main points are as follows:
1, product 1 is head-up little, somatotype up and down, and external form is a top box, and need not overturn in the loam core, and rising head and cast gate concentrate on top box;
2, put external chill 2 on the internal mold loam core, at the thickest position of corresponding foundry goods, the bottom in loam core, place one to three circle external chill 2 according to the thick height of the heavy wall of foundry goods, external chill 2 is of a size of 80 * 50 * 50, material is HT250, external chill 2 usefulness need before with foreign material such as the scab iron rust on sand cleaning machine cleaning external chill 2 surfaces, coating, and inhomogeneous for preventing Quench, levels external chill 2 adopts blossom types staggered;
3, lengthening runner gate 4 length are opened ingate 6-8 road to 3/5 of product girth, tangentially enter die cavity.Running gate system is a unchoked running system, and molten steel can be full of die cavity rapidly, avoids occurring casting flaws such as cold shut;
4, calculate the rising head gross weight according to product yield 80%, determine the quantity of rising head 5 again according to the number of product 1 hanger, promptly each is provided with a feeding head above the hanger, and rising head utilizes common waist type rising head, and is wide: long: high=1: 14-15: 15.The bottom, one side of rising head 5 rides on the internal diameter suitable for reading limit, and the another side direct subsidy is got off to 50mm place, hanger root top.It is that flue dust has another name called and floats pearl that rising head adopts insulating riser sleeve 3, material.According to the size and the shape of product, all products are divided into 8 types, the product of same type adopts with a kind of insulating riser sleeve 3, so just can simplify the kind of insulating riser sleeve 3 greatly.Insulating riser sleeve 3 is laid to fix when moulding and is got final product;
5, pouring molten steel changes from rising head 5 cast to 1/3 when high of rising head 5, simultaneously in the insulation of rising head 5 loam cake exothermic riser covertures, molten steel water full after again teeming be no less than 2 times.
Referring to Fig. 3, adopt the reason and the advantage thereof of above-mentioned process:
1, product adopt head-up little, somatotype up and down, the technology that rising head and running gate system concentrate on external mold can reduce the casting and molding difficulty greatly.Because the internal mold loam core can overturn as under casing, the core wire bone can reduce the arbor production process again, can avoid arbor to hinder the foundry goods effect of contraction, can the banding arbor when product shrinks, and button case knockout is easily smooth.Need not overturn in product button case loam core, reduce special-purpose twin beams double hook driving, alleviates button case labour intensity, reduces the inclined to one side case rate of product.
2, take insulated feeder in conjunction with the external chill method, can improve the product product yield greatly.Can learn from first kind, second kind technology of front: what first kind of technology was taked is pure consecutive solidification method, and all feeding are all from rising head, so its product yield is very low.Second kind of technology its objective is and adopts solidifying process simultaneously, but owing to lower wall thickness difference on the product is big, the chilling action of external chill can not be enough to eliminate the contraction of foundry goods.Under the situation of the riser feeding of frozen plug passage suitable for reading, foundry goods will produce shrinkage cavity, casting flaw such as loose.Analyze from the geometry of product, the situation of the easiest generation casting flaw of product is exactly round because of the bigger thermal center of existence at hanger and product intersection, and shrinkage cavity defect easily takes place herein.Groove appears in the corresponding inwall of hanger place when in use showing as product and may wear to a certain degree, destroys sometimes even with hanger, causes product to scrap in advance.Another kind of situation is exactly that this casting technique is easily loosened at above-mentioned situation in wall thickness place, product bottom, adopts rising head in conjunction with the chill method, has solved all problems effectively.At first be to make full use of direct external chill chilling action, prolong the end region of casting solidification, quicken casting solidification speed, can significantly reduce foundry goods and shrink required molten steel.Easily produce defectives such as shrinkage cavity then at the hanger place, directly rising head is set at 50mm place, hanger top, can allow the direct feeding hanger of molten steel, simultaneously utilize the thermal center circle at hanger place again as the feeding passage, molten steel again can be to the heavy wall place's feeding of foundry goods bottom in the rising head, thereby make whole foundry goods dense structure, no casting flaw.Add and adopt the insulating riser sleeve method, finally reach the casting purpose of the full feeding of little rising head.
3, prolong the horizontal length of watering, it is overheated to eliminate the foundry goods local organization.The overheated main cause of product local organization is exactly that the product ingate is too concentrated, the molten steel same place sand mold of flowing through for a long time, finally at ingate place molten steel because the temperature height causes organizing crystal grain thick.This crystal grain of organizing can't be eliminated by technologies such as heat treatments, and the local thick crystal grain of organizing has seriously reduced mechanical performances such as the resistance to compression of product tension, percentage elongation, in use is prone to the phenomenon such as easy to wear of breaking.By prolonging runner gate, establish ingate newly, the throughput that can disperse per pass ingate molten steel, it is overheated to eliminate ingate place molten steel.It is all careful tight to impel the foundry goods all crystal grains to organize, and improves the mechanical performance of foundry goods greatly.
Select representational three kinds of products below, in conjunction with this technology schematic illustration product result.
1, the breaker mortar rolled wall of Φ 2200 standard round bevel-types, process diagram such as Fig. 4:
This product design single-piece is 3280kg heavily, and according to requirement of client, product increases the weight of to 3800kg, is typical heavy wall Heavy Product.If by first kind of cast, the molten steel total amount will reach 6300kg, exceed the limit of power of company.Higher according to the product height, feeding distance is long, the characteristics that wall thickness is thick, and concrete technology is as follows:
(1) determine product yield 75%, because this product height is higher, feeding distance is long, so suitably strengthen the rising head volume, product yield reduces to 75%, and the total molten steel amount of technology 5100kg belongs in my company single stove tapping scope.Product has 8 hangers, and every hanger is provided with 5 one at rising head, and rising head size 210 * 315 * 315 is singlely emitted salty 160kg.
(2) bottom, internal mold loam core embeds 3 exclusive chills 2, and external chill is the blossom type discharging of staggering, and chill is of a size of 80 * 50 * 50, chill spacing 80mm.
(3) adopt insulating riser sleeve 3, the insulating riser sleeve material is power plant's flue dust, is that binding agent is shaped through the sclerosis of ramming filling CO 2 with waterglass.
(4) casting mold is a dry type clay-bonded sand, brushes water base magnesia coating 3 times.
The examination and test of products: after product reached shake out time, the shake out knockout was easy.Cut rising head after the heat treatment, the rising head place does not have defectives such as shrinkage cavity is loose.The foundry goods working position weares and teares evenly during actual the use, no cracking phenomena, and the hanger place does not have groove.Product wears up to 25m and still can keep not ftractureing when thick.Product promotes 1/4 service time, and economic benefit is very obvious.
2, Xi Mengsi 14 circular cone machine rolled mortar walls
This product is Xi Mengsi 5
1/
2The thick type fixed head of chi cone crusher brachycephaly, the heavy 1800kg of product, suitable for reading thin and end opening is thick, the wall thickness difference is bigger, and the concrete technology of this product is as follows:
(1) according to products characteristics, determine this product product yield 80%, establish 8 rising heads 5 altogether.Running gate system gross weight 360kg, rising head adopt waist shape rising head, and be wide: long: high=1: 15: 15, rising head is of a size of 140 * 210 * 210, emits salty 48kg, external application insulating riser sleeve 3.
(2) according to the product height, bottom, internal mold loam core embeds the direct external chill 2 of two rows, and external chill 2 is the blossom type discharging of staggering, chill size 80 * 50 * 50, chill spacing 80mm.
(3) casting mold is a dry type clay-bonded sand, brushes water base magnesia coating 3 times.
Pouring technology sketch such as Fig. 5:
The examination and test of products: the shake out knockout is easy, the cast(ing) surface polishing, and heat reason back cutting rising head, the rising head place does not have defectives such as shrinkage cavity is loose.The actual use worn and torn evenly, no cracking phenomena, and product prolongs 1/4 service time at least, and economic benefit is obvious.
3, S155D circular cone machine rolled mortar wall is raised by China
This product is the S155 of a Hua Yang company series brachycephaly cone crusher fixed head, and product heavily be 750kg, and suitable for reading thin and end opening is thick, the product height is constant, and referring to Fig. 6, specifically technology is as follows:
(1) according to products characteristics, determine that this product product yield is 80%, establish 6 rising heads 5 altogether, running gate system gross weight 150kg, rising head adopt waist type insulating riser sleeve 3, and rising head is of a size of 115 * 170 * 170, singlely emits salty 26kg.
(2) according to the product height, an exclusive chill 2 is placed in corresponding foundry goods thickness, bottom, internal mold loam core, and chill is of a size of 100 * 60 * 60, between the chill apart from 60mm.
(3) casting mold is a dry type clay-bonded sand, 3 times water base magnesia coating of brush before the roasting mould.
By process modification design, successfully reduce the production difficulty, improved the product product yield, improved the product institutional framework, prolonged product service life, reduced production cost.Obtained tangible economic benefit, actual production shows that this production technology is a kind of successful production technology, has very big application and promotional value.
Claims (2)
1, the non-homogeneous wall thickness cast casting of a kind of circular platform type technology mould, comprise internal mold loam core and rising head (5), it is characterized in that: be placed with one to three circle external chill (2) according to the thick height of heavy wall of foundry goods at the thickest position of corresponding foundry goods, the bottom in described internal mold loam core; Described internal mold loam core is provided with lengthening runner gate (4), the length that described internal mold loam core is provided with lengthening runner gate (4) is 3/5 of foundry goods girth, described rising head (5) is arranged on above the hanger of foundry goods, the bottom, one side of described rising head (5) rides on the internal diameter suitable for reading limit, the another side direct subsidy is got off to 50mm place, foundry goods hanger root top, and described rising head (5) adopts insulating riser sleeve (3).
2, the non-homogeneous wall thickness cast casting of circular platform type according to claim 1 technology mould, it is characterized in that: described external chill (2) is of a size of 80 * 50 * 50, material is HT250, described external chill (2) is with needing to clear up foreign material such as the surperficial scab iron rust of described external chill (2), coating with sand cleaning machine before, and levels external chill (2) adopts blossom type staggered.
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| CN102416443A (en) * | 2011-12-02 | 2012-04-18 | 芜湖双金机械配件有限公司 | Moving cone feeding anti-cracking structure and preparation method thereof |
| CN103878325A (en) * | 2012-12-19 | 2014-06-25 | 江苏华东风能科技有限公司 | Novel casting and pouring system for hub casting of wind driven generator |
| CN103878312A (en) * | 2012-12-19 | 2014-06-25 | 江苏华东风能科技有限公司 | Novel casting and pouring system for conical support casting of wind driven generator |
| CN103878312B (en) * | 2012-12-19 | 2016-08-31 | 江苏华东风能科技有限公司 | The system for casting and pouring of wind-driven generator taper support foundry goods |
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| CN104759606A (en) * | 2015-04-17 | 2015-07-08 | 浙江机电职业技术学院 | Rapid progressive solidification technique device for high manganese steel rolling mortal wall casting |
| CN104759594A (en) * | 2015-04-17 | 2015-07-08 | 浙江机电职业技术学院 | Fast progressive solidification device for high manganese steel broken wall casting |
| CN106216601A (en) * | 2016-07-28 | 2016-12-14 | 共享铸钢有限公司 | The casting method of ore crusher cone class foundry goods |
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| CN112247069A (en) * | 2020-08-25 | 2021-01-22 | 常熟市虹桥铸钢有限公司 | Casting method of lower casting of gearless electric propeller hull |
| CN112872297A (en) * | 2020-12-25 | 2021-06-01 | 兰州高压阀门有限公司 | Stepped feeding casting process for large-scale profile section casting |
| CN112872297B (en) * | 2020-12-25 | 2023-04-25 | 兰州高压阀门有限公司 | Stepped feeding casting process for large-sized profile section casting |
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