CN205289646U - Lost pattern casting middlings processing system disappears - Google Patents

Abstract

The utility model discloses a lost pattern casting middlings processing system disappears belongs to the lost pattern casting field that disappears. The utility model discloses a fence, shale shaker, first lifting machine, cooling cylinder, suction hood, second lifting machine, conveyer belt, casting bed and sand box, the below of fence set up the shale shaker, and this shale shaker is including all vibrating the sieve with vibrating motor on continuous, vibrating the sieve down, on vibrate the sieve on the equipartition have the through -hole, the one end of vibrating the sieve down is equipped with the baffle, and the other end belongs to the below slope of orientation to first lifting machine, first lifting machine is used for promoting the molding sand that vibrates under the sieve upper reaches down to the cooling cylinder entrance, and the top in cooling cylinder exit is equipped with the suction hood, the second lifting machine is used for promoting the molding sand that the cooling cylinder exit flowed down to the conveyer belt, the conveyer belt is located at least three casting bed top, and the conveyer belt is arranged in carrying the molding sand to the casting bed. The utility model discloses structural design is ingenious, can be low -cost to the molding sand processing that circulates.

Description

Sand preparing system in a kind of lost foam casting

Technical field

This utility model relates to lost foam casting field, more particularly, it relates to sand preparing system in a kind of lost foam casting.

Background technology

The technique of lost foam casting process includes white area, black area and yellow district technique, in existing Technology of EPC, black area is the operation carrying out sand process, regeneration after being processed by undertaken screening by the molding sand well sand preparing system after using, dedusting etc., it primarily serves the purpose of: screens out impurity in molding sand foreign material such as () sand lump, scum, coating dust, cooling, conveying and stores molding sand. From the casting technique of evaporative pattern and the requirement to equipment, dry sand has broken and efflorescence unavoidably in moulding use and cyclic process, simultaneously, the coating dust decomposed in casting process also can be mixed into wherein, the performance of molding sand can be worsened, reduce breathability, consume more binding agent, it is therefore desirable to the dust that broken for molding sand and efflorescence and coating are decomposed and formed is removed. Additionally, initial temperature after the molding sand demoulding is very high, generally there are 200��500 DEG C, in evaporative pattern produces, when sand temperature is too high, modeling process can scorch thin film or cause thin film warpage, therefore before moulding, sand temperature should control just can reuse below 55 DEG C as far as possible, it is therefore desirable to efficient cooling device could realize. Therefore, it does not have the lost foam casting process of configuration sand preparing system, it is difficult to show the excellent feature of lost foam casting production environment and guarantee the stability of product quality. Existing lost foam casting process generally configures sand preparing system, but existing sand preparing system often structure is complicated, manufacture and operating cost is higher.

Through retrieval, application publication number: CN103909216A, publication date: on July 9th, 2014, invention and created name is: a kind of Lost Form Casting Production Line sand preparing system, this application case discloses a kind of evaporative pattern sand preparing system, including peeling system, ash disposal cooling system, select sand system, sand induction system, center sand storage, middle sand storage, filling moulding system, dust pelletizing system, control system, sand induction system is made up of four conveyer devices, peeling system is connected with middle sand storage by the first conveyer device, middle sand storage is connected with ash disposal cooling system by the second conveyer device, ash disposal cooling system is connected with selecting sand system by the 3rd conveyer device, sand system is selected to be connected with center sand storage and filling moulding system respectively by the 4th conveyer device, dust pelletizing system and control system and peeling system, ash disposal cooling system, select sand system, sand induction system, center sand storage, middle sand storage, filling moulding system, it is respectively connected with. but, the sand preparing system structure of this application case is complicated, manufactures and operating cost is higher.

Utility model content

1. utility model to solve the technical problem that

The purpose of this utility model is in that to overcome above-mentioned deficiency of the prior art, it is provided that sand preparing system in a kind of lost foam casting, this sand preparing system smart structural design, it is possible to low cost molding sand is circulated process.

2. technical scheme

For reaching above-mentioned purpose, the technical scheme that this utility model provides is:

Sand preparing system in lost foam casting of the present utility model, described sand preparing system includes fence, vibrosieve, the first elevator, cooling cylinder, dust shield, the second elevator, conveyer belt, casting bed and sandbox, described fence be arranged below vibrosieve, this vibrosieve includes the upper oscillating screen plate being all connected, lower oscillating screen plate with vibrating motor, upper oscillating screen plate and lower oscillating screen plate is upper and lower be arranged in parallel; Being evenly equipped with through hole on described upper oscillating screen plate, the two ends of upper oscillating screen plate are equipped with baffle plate; One end of described lower oscillating screen plate is provided with baffle plate, and the other end is to the inclined downward in the first direction, elevator place; Described first elevator is positioned at the side of lower oscillating screen plate, the first elevator for the molding sand flowed down on lower oscillating screen plate being promoted to cooling cylinder porch, cooling cylinder exit be arranged over dust shield; Described second elevator is positioned at the side in cooling cylinder exit, and the second elevator is for being promoted to conveyer belt by the molding sand that cooling cylinder exit flows down; Described conveyer belt is positioned at above at least three casting bed, used for conveyer belt in being delivered in casting bed by molding sand, casting bed be arranged below sandbox.

Further improving as this utility model, described sand preparing system also includes vacuum distribution, and this vacuum distribution is provided with multiple access port, and this access port is connected with the vacuum orifice on sandbox by pipeline; Described vacuum distribution is connected with vaccum-pumping equipment.

Further improving as this utility model, described cooling cylinder porch is provided with magnetic separator, and this magnetic separator is for carrying out magnetic separation process by the molding sand entered in cooling cylinder.

Further improving as this utility model, described cooling cylinder bottom surface is connected with three ajutages respectively, and above three ajutage is equidistantly distributed along cooling cylinder length direction and is all connected with the air outlet of high pressure positive blower; Being surrounded with cooling water coil on the inwall of described cooling cylinder, position, the axis erection within cooling cylinder has helical form cooling water pipe.

Further improve as this utility model, above described fence, above vibrosieve, above each casting bed, be provided with dust shield.

Further improve as this utility model, described dust shield is all connected with cleaner, this cleaner includes cyclone dust extractor, sack cleaner and dedusting fan, described dust shield is connected with the entrance of cyclone dust extractor, and the outlet of cyclone dust extractor is connected with dedusting fan by sack cleaner.

Further improving as this utility model, the angle of described lower oscillating screen plate and horizontal plane is 4��5 ��.

Further improving as this utility model, the through-hole aperture on described upper oscillating screen plate is gradually reduced to the other end in the first direction, elevator place from certain one end.

Further improve as this utility model, between lower section and the fence of each casting bed, be equipped with a track slided for sandbox.

Further improving as this utility model, the lower section of each casting bed is equipped with three-dimensional vibrating-compaction table.

3. beneficial effect

The technical scheme adopting this utility model to provide, compared with prior art, has following remarkable result:

(1) in this utility model, upper oscillating screen plate and lower oscillating screen plate are obliquely installed, pending molding sand drops down onto after on oscillating screen plate, slowly move to the first direction, elevator place under the effect of vibration, in molding sand moving process, one side is filtered, while tiling is come, avoid the problem affecting oscillating screen plate filter efficiency because molding sand gathers in the underface of fence all the time, and large granular impurity and out-of-size molding sand are automatically sent to oscillating screen plate overhead gage place, it is simple to centralized recovery processes.

(2) in this utility model, molding sand is trapped among wherein by cooling water coil and helical form cooling water pipe jointly so that molding sand is blown to any direction in cooling cylinder all can obtain abundant heat exchange, is greatly improved the cooling effect of cooling cylinder.

(3) in order to improve the working environment at scene in this utility model, it is to avoid dust pollution, above fence, above vibrosieve, above each casting bed, it is provided with dust shield, to remove the dust in air.

(4) in this utility model, cleaner includes cyclone dust extractor, sack cleaner and dedusting fan, dedusting fan provides suction, the systemic dust laden air of dust shield first passes through cyclone dust extractor and removes oarse-grained dust, avoid bulky grain dust to the abrasion of cloth bag on sack cleaner simultaneously, cloth bag is played a protective role; Being then passed through sack cleaner and remove short grained dust, the air after dedusting eventually passes dedusting fan and discharges, and cleaner adopts two-stage dedusting, and dust removing effects is better.

(5) on upper oscillating screen plate, position the closer to the first direction, elevator place, the time that material is vibrated herein above is more of a specified duration, therefore go up on oscillating screen plate, position the closer to the first direction, elevator place, large granular impurity is more easily shattered into little granule with out-of-size molding sand and falls on the lower oscillating screen plate of lower section, and the through-hole aperture on upper oscillating screen plate is designed as to the other end in the first direction, elevator place from certain one end by this utility model and is gradually reduced, then can be prevented effectively from the appearance of the problems referred to above.

(6) sand preparing system of the present utility model, smart structural design, manufactures and operating cost is relatively low.

Accompanying drawing explanation

Fig. 1 is the main TV structure schematic diagram of cross gate in embodiment;

Fig. 2 is the plan structure schematic diagram of cross gate in embodiment;

Fig. 3 is the main TV structure schematic diagram that in embodiment, white mould assembly is bundled on fixed mount;

Fig. 4 is the plan structure schematic diagram of scraper evaporative pattern in embodiment;

Fig. 5 is the main TV structure schematic diagram of scraper evaporative pattern in embodiment;

Fig. 6 is the left view structural representation at A place in Fig. 4;

Fig. 7 is the plan structure schematic diagram of lateral lobe sheet evaporative pattern in embodiment;

Fig. 8 is the left view structural representation at B place in Fig. 7;

Fig. 9 is the main TV structure schematic diagram of lateral lobe sheet evaporative pattern in embodiment;

Figure 10 is the plan structure schematic diagram of Leaf evaporative pattern in embodiment;

Figure 11 is the main TV structure schematic diagram at C place in Figure 10;

Figure 12 is the sectional structure schematic diagram in Figure 10 along line D-D;

Figure 13 is the structural representation of sand preparing system in embodiment;

Figure 14 is the process chart of lost foam casting scraper wearing piece in embodiment.

Label declaration in accompanying drawing:

1, cross gate; 101, drain muscle; 102, inserting groove; 103, lightening grooves; 104, cross gate main body; 2, ingate; 201, drain block; 202, grafting block; 3, foundry goods evaporative pattern; 4, fixed mount;

13, scraper evaporative pattern; 1301, the edge of a knife is scraped; 13011, the first inclined plane; 13012, the second inclined plane; 13013, the 3rd inclined plane; 13014, the 4th inclined plane; 1302, scraper body; 1303, scraper installing hole; 13031, wear-resistant protective layer; 1304, scraper lightening grooves;

23, lateral lobe sheet evaporative pattern; 2301, the first use portion; 23011, lateral lobe sheet the first inclined plane; 23012, lateral lobe sheet the second inclined plane; 23013, lateral lobe sheet the 3rd inclined plane; 23014, lateral lobe sheet the 4th inclined plane; 2302, side blade body; 2303, lateral lobe sheet installing hole; 23031, lateral lobe sheet wear-resistant protective layer; 2304, loss of weight breach; 2305, the second use portion; 2306, baffle plate;

33, Leaf evaporative pattern; 3301, use portion;3302, Leaf body; 3303, Leaf installing hole; 33031, Leaf wear-resistant protective layer; 3304, Leaf lightening grooves;

1-1, fence; 1-2, upper oscillating screen plate; 1-3, lower oscillating screen plate; 1-4, the first elevator; 1-5, magnetic separator; 1-6, high pressure positive blower; 1-7, cooling cylinder; 1-8, ajutage; 1-9, dust shield; 1-10, the second elevator; 1-11, conveyer belt; 1-12, casting bed; 1-13, sandbox; 1-14, vacuum distribution.

Detailed description of the invention

For further appreciating that content of the present utility model, in conjunction with the accompanying drawings and embodiments this utility model is described in detail.

Embodiment 1

In conjunction with Fig. 1��6 and Figure 13��14, the technique of the lost foam casting scraper wearing piece of the present embodiment, comprise the following steps,

Step ST1, prepare white mould;

With expandable polystyrene for raw material, raw material being put into pre-foaming machine, the steam passing into 70��100 DEG C carries out prefoam in 2��5 minutes so that the foam volume obtained after prefoam increases to 5��10 times before prefoam;

Utilizing compression air to rush in mould by the foam obtained after prefoam, pass into the steam of 50��100 DEG C in mould, foaming obtains Bai Mo;

In mould, pass into cooling water from top to bottom, after mould cools down, the upper mould of mould is opened, then in mould, pass into compression air from bottom to top, white mould is ejected in mould; In the present embodiment, utilize compression air to be ejected in mould by white mould, it is possible to avoid the problem of fragile white mould during artificial delivery, improve the qualification rate that white molding is standby.

Wherein, Bai Mo includes cross gate 1, ingate 2 and foundry goods evaporative pattern 3.

Cross gate 1 is strip, cross gate 1 includes cross gate main body 104, this cross gate main body 104 upper middle position is provided with drain muscle 101 along its length, and cross gate main body 104 top is also provided with 3��8 inserting grooves 102 (taking 3 in concrete the present embodiment) along its length equally spacedly; The length direction of inserting groove 102 is parallel to cross gate main body 104 width, this inserting groove 102 is made up of two side and rear wall, form one end and be provided with the rectangular channel of opening, it is simple to the grafting block 202 on ingate 2 is mated connection in the opening insertion rectangular channel of rectangular channel; Offer lightening grooves 103 to the lateral symmetry of drain muscle 101.

Foundry goods evaporative pattern 3 and ingate 2 are integrated, it is ensured that molten iron successfully can flow into foundry goods evaporative pattern 3 through ingate 2, and without foundry goods evaporative pattern 3 and ingate 2 being bonded by glue, time saving and energy saving; It is provided with ingate 2 to the lateral symmetry of foundry goods evaporative pattern 3, this ingate 2 includes drain block 201 and grafting block 202, drain block 201 and grafting block 202 are rectangular block, the width of grafting block 202 is equal with the width of drain block 201, drain block 201 and grafting block 202 are mutually perpendicular to and collectively form L-shaped structure, drain block 201 is connected with foundry goods evaporative pattern 3, and the thickness of drain block 201 is 1/4��1/2 (taking 1/4 in concrete the present embodiment) of grafting block 202 thickness; Grafting block 202 is for matching with above-mentioned inserting groove 102.

In order to ensure that grafting block 202 can be tightly secured in inserting groove 102, the width of grafting block 202 is more than the width 2��3mm (taking 2mm in concrete the present embodiment) of inserting groove 102, making grafting block 202 clamp-on in inserting groove 102, the squeezing action of grafting block 202 in it is made grafting block 202 more firm with what inserting groove 102 was fixed by inserting groove 102.The thickness of grafting block 202 is equal to the degree of depth of inserting groove 102, it is simple to grafting block 202 can insert in inserting groove 102 with agreeing with completely so that does not leave space between grafting block 202 and inserting groove 102, is conducive to molten iron smooth flow.

In prior art, cross gate and ingate are split type, needing to be glued together cross gate and ingate by glue before casting, this design charges expenses of labour power, production cost is higher and reduces casting quality, simultaneously, the generally rectangular cross-section long slab of cross gate, is unfavorable for the flowing of molten iron; In order to overcome disadvantages mentioned above, the present embodiment is made following improvement: (1) is coordinated by grafting block 202 and inserting groove 102, can easily multiple foundry goods evaporative patterns 3 be arranged between two cross gates 1 equally spacedly, the multiple foundry goods evaporative pattern 3 of disposal pouring, improves production efficiency; Cross gate 1 and ingate 2 is connected by the mode of grafting, relative to the mode of glue bonding, more convenient to operate, therefore save trouble and labor, it is to avoid the use of glue, therefore reduce production cost; And the mode of grafting is more firm, it is not easy that obscission occurs in handling process or in sandbox note sand jolt ramming process, substantially increases casting quality; (2) cross gate main body 104 upper middle position is provided with drain muscle 101 along its length, molten iron is played drainage by drain muscle 101, molten iron can quickly be drained in each ingate 2 along the length direction of drain muscle 101 in time, make molten iron at each position homogeneous temperature, it is prone to foundry goods molding, improves yield rate; The mobility good in casting process in order to ensure molten iron, offer lightening grooves 103 to the lateral symmetry of drain muscle 101, the design of lightening grooves 103 not only reduces the residue after cast, reduce the resistance of molten iron flow simultaneously, improve molten iron flow speed, be conducive to molten iron uniformly to cool down, improve the quality of foundry goods molding.

In order to enable molten iron to flow more swimmingly along cross gate 1 length direction, intersection at lightening grooves 103 with inserting groove 102 adopts arc transition (but not right-angle structure), the streamlined structure design of arc transition is compared to the design of right-angle structure, decrease the resistance of molten iron flow, improve the quality of foundry goods molding.

The both sides of drain muscle 101 one end are provided with contiguous block, the side of drain muscle 101 end is connected by this contiguous block with cross gate main body 104, the setting of contiguous block expands the cross section of drain muscle 101 end, molten iron enters from this end of drain muscle 101, expand molten iron and enter the circulation area of drain muscle 101 end, be conducive to molten iron smooth outflow.

Design of Gate is often that a little rectangular block is connected on cast model by prior art, when the foundry goods of molding being cleared up after casting complete, need to knock out the ingate coagulum being connected on foundry goods, polishing is clean, but owing to ingate coagulum and foundry goods body are common molding when cast, often result in and knock out in ingate coagulum process, it not that ingate coagulum stays one section to be difficult to clean off on foundry goods body, partly also struck near foundry goods body and ingate coagulum junction, not only work consuming consuming time, and have a strong impact on the quality of foundry goods, add foundry goods defect rate. in order to overcome disadvantages mentioned above, the present embodiment is made following improvement: ingate 2 includes drain block 201 and grafting block 202, drain block 201 is connected with foundry goods evaporative pattern 3, grafting block 202 is for matching with above-mentioned inserting groove 102, the thickness of drain block 201 is the 1/4��1/2 of grafting block 202 thickness, in the present embodiment, the thickness of drain block 201 is less, greatly facilitate and knock out the coagulative process of ingate, namely ingate coagulum is less with the segment thickness that foundry goods body is connected, it is easier to knock out from foundry goods body and comes off and not adhesive tape foundry goods body part, knock out the part come off more neat, it is easy to polishing, time and labour saving, improve the presentation quality of foundry goods,In the present embodiment, ingate 2 is designed as L-shaped so that the easy stress of the coagulative L-shaped structure of ingate, it is simple to knock out operation.

In concrete the present embodiment, foundry goods evaporative pattern 3 is scraper evaporative pattern 13, this scraper evaporative pattern 13 includes scraper body 1302 and scrapes the edge of a knife 1301, scrape the edge of a knife 1301 and be positioned at the side of scraper body 1302, two scraper installing holes 1303 it are provided with symmetrically before and after on scraper body 1302, this scraper installing hole 1303 is waist-shaped hole, for scraper body 1302 being arranged on mixing arm by bolt, scraper installing hole 1303 be formed around one layer of wear-resistant protective layer 13031, this wear-resistant protective layer 13031 exceeds the upper surface 5��6mm (taking 5mm in concrete the present embodiment) of scraper body 1302, and the junction of wear-resistant protective layer 13031 and scraper body 1302 adopts arc transition, the abrasion being designed to reduction junction of arc transition, strengthens the result of use of wear-resistant protective layer 13031. the outer surface scraping the edge of a knife 1301 includes the first inclined plane 13011, second inclined plane 13012, 3rd inclined plane 13013 and the 4th inclined plane 13014, first inclined plane 13011 is the upper surface scraping the edge of a knife 1301, first inclined plane 13011 is inclined upwardly, first inclined plane 13011 is 30��35 �� (taking 30 �� in concrete the present embodiment) with horizontal angle, second inclined plane 13012 is connected with the first inclined plane 13011, and second inclined plane 13012 downward-sloping, the angle of the second inclined plane 13012 and vertical line is 50��55 �� (taking 50 �� in concrete the present embodiment), 4th inclined plane 13014 is the lower surface scraping the edge of a knife 1301, and the second inclined plane 13012 is connected by the 3rd inclined plane 13013 with the 4th inclined plane 13014, the outer surface scraping the edge of a knife 1301 in the present embodiment is made up of multiple inclined planes, adopts scraping the edge of a knife 1301 and can being obviously improved serviceability and the service life of the scraper wearing piece corresponding position cast out of unique texture in the present embodiment. secondly, in order to alleviate the weight of scraper wearing piece after casting, reduce manufacturing cost, be provided with scraper lightening grooves 1304 symmetrically in the rear and front end of scraper body 1302.

Existing scraper body designs for plane body, in concrete-agitating process, and the stirring between concrete has very big resistance, have very big deterioration at work, especially the installing hole place on scraper, the bolt in installing hole can be made damaged, in actual engineer applied, tend to cause the generation of the accidents such as scraper installation is insecure or comes off from mixing arm reducing the service life of scraper, thus adding the loss of scraper wearing piece. in order to overcome disadvantages mentioned above, the present embodiment is made following improvement: scraper installing hole 1303 be formed around one layer of wear-resistant protective layer 13031, this wear-resistant protective layer 13031 exceeds the upper surface of scraper body 1302 and has certain thickness, scraper installing hole 1303 is played significant protective effect, when scraper works, after wear-resistant protective layer 13031 is worn loss completely, just scraper installing hole 1303 can be formed abrasion, such design protects scraper installing hole 1303 and interior fixing bolt thereof significantly, improve the service life of scraper, thus reducing the loss of scraper wearing piece.

Step ST2, assemble white mould;

In step ST2, two cross gates 1 are vertically arranged, make the inserting groove 102 on two cross gates 1 facing each other, 3 foundry goods evaporative patterns 3 are between two cross gates 1, simultaneously, inventor sums up through great many of experiments and finds, at least at a distance of 5mm (taking 10mm in the present embodiment) guarantee foundry goods final molding quality between adjacent foundry goods evaporative pattern 3;The ingate 2 of foundry goods evaporative pattern 3 both sides matches with the cross gate 1 of respective side respectively, obtains white mould assembly. Owing to cross gate 1 being equidistantly distributed inserting groove 102, therefore equidistantly it is distributed between adjacent foundry goods evaporative pattern 3, is conducive to molten iron to flow at the length direction of cross gate 1 evenly, improve the quality of foundry goods molding.

Step ST3, prepare coating;

In step ST3, refractory aggregate, organic binder, anhydrous adhesive, suspending agent, thickening stabilizing agent, defoamer and preservative mix homogeneously are obtained coating, wherein: refractory aggregate accounts for 17��18% (taking 17% in concrete the present embodiment) of coating gross mass, the particle diameter that refractory aggregate is the mixture of brown alundum powder and silica flour, brown alundum powder and silica flour is more than 300 orders; Organic binder is the mixture of sodium carboxymethyl cellulose and white glue with vinyl, sodium carboxymethyl cellulose accounts for 0.2��0.6% (taking 0.2% in concrete the present embodiment) of coating gross mass, white glue with vinyl accounts for 3��6% (taking 3% in concrete the present embodiment) of coating gross mass, contains the polyvinyl alcohol of mass percent 20% in white glue with vinyl; Anhydrous adhesive is Ludox, and Ludox accounts for 3��8% (taking 3% in concrete the present embodiment) of coating gross mass; Suspending agent is sodium bentonite, and sodium bentonite accounts for 1��4% (taking 1% in concrete the present embodiment) of coating gross mass; Thickening stabilizing agent is polyacrylamide, and polyacrylamide accounts for 0.1��0.2% (taking 0.1% in concrete the present embodiment) of coating gross mass.

In the present embodiment, adopt coating prepared by mentioned component, cost is low, the white module that is bonded in that can be firm fills surface, compared with the coating adopted in prior art, adopt the coating in the present embodiment so that the disposable percentage ratio that comes off of casting finished products dope layer improves further, smooth in appearance after foundry goods molding, casting finished products qualification rate also significantly rises.

Step ST4, swabbing;

Groove and through hole on foundry goods evaporative pattern 3 there will be following two problem in casting process: groove on (1) foundry goods evaporative pattern 3 and through hole is as easy as rolling off a log after foundry goods molding is stained with sand, are not easy to follow-up sand removal operation; (2) owing to the molten iron circulation when cast of the groove on foundry goods evaporative pattern 3 and through hole is slower, therefore during cast, molten iron temperature is relatively low herein, the rate of set of molten iron and the rate of set of molten iron elsewhere asynchronous (groove on synchronization foundry goods evaporative pattern 3 and the condensation degree of through hole molten iron are with inconsistent elsewhere) herein when making to pour into a mould, after foundry goods molding, easily form bigger internal stress at cast-internal, serious forms crackle even at cast(ing) surface, and this problem is always up puzzlement lost foam casting field technical barrier for many years. For above-mentioned technical barrier in prior art, general resolving ideas is " processing " afterwards, when cast-internal forms bigger internal stress because of above-mentioned reason, is eliminated by follow-up Technology for Heating Processing, but do so adds the operation of subsequent heat treatment, adds manufacturing cost. Before cast or cast, how to improve the construction technology of certain step, accomplish " in advance prevention ", prior art never has relevant technical scheme or constitutes the corresponding technology scheme of technology enlightenment.

In step ST4, with brush pen by coating thick to groove surfaces all of on foundry goods evaporative pattern 3 and one layer of 2��3mm of through-hole surfaces brush (taking 2mm in concrete the present embodiment), dry, in the present embodiment, the coating of all of groove surfaces and one layer of 2��3mm thickness of through-hole surfaces brush on foundry goods evaporative pattern 3 in advance, make on foundry goods evaporative pattern 3 paint thickness of all of groove surfaces and through-hole surfaces more than other parts on foundry goods evaporative pattern 3 comparatively speaking, therefore, when cast the groove on foundry goods evaporative pattern 3 and through hole and around heat conductivity between molding sand less relative to other parts on foundry goods evaporative pattern 3, therefore, it is possible to the molten iron rate of set of the groove slowed down on foundry goods evaporative pattern 3 and through hole, when making to pour into a mould, the rate of set of the groove on foundry goods evaporative pattern 3 and through hole molten iron is Tong Bu with the rate of set maintenance of molten iron elsewhere on foundry goods evaporative pattern 3, the internal stress that after effectively eliminating foundry goods molding, cast-internal is formed,The paint thickness of foundry goods evaporative pattern 3 upper groove surface and through-hole surfaces is thicker simultaneously, is very unlikely to be stained with sand after foundry goods molding herein, facilitates follow-up sand removal operation. It should be noted that, inventor sums up through a large amount of field experimentatioies, when the coating that foundry goods evaporative pattern 3 upper groove surface and through-hole surfaces are thick for one layer of 2��3mm of brush in advance, the above-mentioned technique effect of guarantee, when coating too thick or too thin time, the groove all can not being effectively ensured during cast on foundry goods evaporative pattern 3 and the rate of set of through hole molten iron with on foundry goods evaporative pattern 3 elsewhere the rate of set of molten iron keep Tong Bu.

Step ST5, dip-coating material;

In step ST5, preparing white mould assembly, the cross gate 1 being vertically arranged foundry goods evaporative pattern 3 both sides is bundled in the two side arms of fixed mount 4 respectively through rope, and fixed mount 4 is rectangular frame; Then immerse in coating pond by overall for fixed mount 4, take out fixed mount 4 and dry; Immerse in coating pond by overall for fixed mount 4 again, take out fixed mount 4 and again dry. In the present embodiment, when white mould assembly entirety is coated with coating, it is necessary to white mould assembly is fixed by fixed mount 4, to protect the overall structure of white mould assembly.

Step ST6, moulding;

In step ST6, first bottom sandbox 1-13, spread a stratotype sand, utilize three-dimensional vibrating-compaction table jolt ramming, shake smooth, white mould assembly is taken off from fixed mount 4, white mould assembly is hung middle part in sandbox 1-13 again, by at the uniform velocity adding sand and vibrate sandbox 1-13 in casting bed 1-12 sandbox 1-13 downwards, the amplitude of sandbox 1-13 is 0.2��0.4mm, until stopping during molding sand 10��20mm suitable for reading from sandbox 1-13 adding sand, stopping stops vibration after adding sand 30��45s, then plastic sheeting is laid at sandbox 1-13 top, and with dry sand gland plastic sheeting, place cup, to be cast.

Step ST7, cast;

In step ST7, it is 1350��1400 DEG C that pouring temperature controls, and controls negative pressure value 0.015��0.025MPa when building in sandbox 1-13, after being poured, crosses 6��7min and removes vacuum.

Step ST8, molding sand reclaim;

In step ST8, sand preparing system is utilized to carry out molding sand recovery, sandbox 1-13 is moved on fence 1-1 and mould turnover, foundry goods is intercepted by fence 1-1, pending molding sand drops down onto on upper oscillating screen plate 1-2 by the through hole on fence 1-1, along with the vibration of upper oscillating screen plate 1-2, the molding sand of size qualification falls on lower oscillating screen plate 1-3 by the through hole on upper oscillating screen plate 1-2, and large granular impurity and out-of-size molding sand are left on oscillating screen plate 1-2; Molding sand on lower oscillating screen plate 1-3 is promoted to cooling cylinder 1-7 porch by the first elevator 1-4, and carry out magnetic separation process in cooling cylinder 1-7 porch, molding sand after magnetic separation process enters cooling, dedusting in cooling cylinder 1-7, molding sand after cooling, dedusting passes sequentially through the second elevator 1-10, conveyer belt 1-11 is delivered in each casting bed 1-12, completes molding sand removal process;

Wherein, sand preparing system includes fence 1-1, vibrosieve, the first elevator 1-4, cooling cylinder 1-7, dust shield 1-9, the second elevator 1-10, conveyer belt 1-11, casting bed 1-12 and sandbox 1-13, fence 1-1 is arranged below vibrosieve, this vibrosieve includes the upper oscillating screen plate 1-2 being all connected, lower oscillating screen plate 1-3 with vibrating motor, upper oscillating screen plate 1-2 and lower oscillating screen plate 1-3 is upper and lower be arranged in parallel; Being evenly equipped with through hole on upper oscillating screen plate 1-2, the two ends of upper oscillating screen plate 1-2 are equipped with baffle plate;One end of lower oscillating screen plate 1-3 is provided with baffle plate, and the other end is to the inclined downward in the first direction, elevator 1-4 place so that the angle of lower oscillating screen plate 1-3 and horizontal plane is 4��5 �� (being 4 ��) in concrete the present embodiment, in the present embodiment, due to being obliquely installed of upper oscillating screen plate 1-2 and lower oscillating screen plate 1-3, pending molding sand is dropped down onto after on oscillating screen plate 1-2, slowly can move to the first direction, elevator 1-4 place under the effect of vibration, in molding sand moving process, one side is filtered, while tiling is come, avoid the problem affecting oscillating screen plate 1-2 filter efficiency because molding sand gathers in the underface of fence 1-1 all the time, and the end-stopping plate place that the large granular impurity that stays and out-of-size molding sand are automatically sent to upper oscillating screen plate 1-2 on close first elevator 1-4 after upper oscillating screen plate 1-2 filters, it is easy to centralized recovery and processes large granular impurity and out-of-size molding sand, the molding sand of size qualification is at the uniform velocity delivered on the first elevator 1-4 on lower oscillating screen plate 1-3, wherein, inventor sums up through repeatedly field practice and finds, the angle of lower oscillating screen plate 1-3 Yu horizontal plane is designed as 4��5 �� (namely the angle of upper oscillating screen plate 1-2 and horizontal plane is 4��5 ��), ensure that the molding sand on oscillating screen plate 1-2 can at the uniform velocity tile, ensure its filter effect, also make the molding sand of size qualification on lower oscillating screen plate 1-3 at the uniform velocity gently to move to the first elevator 1-4, adapt with the unit interval sand treating capacity of sand preparing system in the present embodiment. first elevator 1-4 is positioned at the side of lower oscillating screen plate 1-3, first elevator 1-4 is for being promoted to cooling cylinder 1-7 porch by the molding sand flowed down on lower oscillating screen plate 1-3, cooling cylinder 1-7 porch is provided with magnetic separator 1-5, this magnetic separator 1-5 is for carrying out magnetic separation process by the molding sand entered in cooling cylinder 1-7, in the present embodiment, pending molding sand first passes through after oscillating screen plate 1-2 filters out large granular impurity (including bulky grain irony impurity) and out-of-size molding sand, magnetic separation process is carried out again through magnetic separator 1-5, so design significantly reduces the workload of magnetic separator 1-5, be conducive to improving treatment effect and the treatment effeciency of molding sand. cooling cylinder 1-7 exit be arranged over dust shield 1-9, this dust shield 1-9 not only acts as in the effect absorbing cooling cylinder 1-7 exit absorption dust laden air, local decompression is also formed in cooling cylinder 1-7 exit, making cooling cylinder 1-7 porch and exit form pressure reduction, the molding sand of cooling cylinder 1-7 porch moves under above-mentioned differential pressure action in cooling cylinder 1-7.

From the casting technique of evaporative pattern and the requirement to equipment, molding sand has broken and efflorescence unavoidably in moulding use and sand processing procedure, simultaneously, the coating dust decomposed in casting process also can be mixed into wherein, the performance of molding sand can be worsened, reduce its breathability, coating step consumes more coating, it is therefore desirable to the dust that broken for molding sand and efflorescence and coating are decomposed and formed is removed.

In the present embodiment, cooling cylinder 1-7 primarily serves cooling molding sand and removes the function of dust in molding sand, cooling cylinder 1-7 bottom surface is connected with three ajutage 1-8 respectively, and above three ajutage 1-8 is equidistantly distributed along cooling cylinder 1-7 length direction and is all connected with the air outlet of high pressure positive blower 1-6; Being surrounded with cooling water coil on the inwall of cooling cylinder 1-7, position, the axis erection within cooling cylinder 1-7 has helical form cooling water pipe.The gases at high pressure that molding sand is passed into by three ajutage 1-8 in cooling cylinder 1-7 blow afloat, main and the erection of cooling cylinder 1-7 axis line inside position the helical form cooling water pipe of the molding sand blown afloat carries out heat exchange, simultaneously, molding sand is also carried out heat exchange with on cooling cylinder 1-7 inwall around the cooling water coil arranged in blowing afloat process, molding sand is rapidly cooled after the common heat exchange of helical form cooling water pipe and cooling water coil, mobile to cooling cylinder 1-7 outlet under local decompression's effect that cooling cylinder 1-7 exit is formed. In the present embodiment, molding sand is trapped among wherein by cooling water coil and helical form cooling water pipe jointly so that molding sand is blown to any direction in cooling cylinder 1-7 all can obtain abundant heat exchange, is greatly improved the cooling effect of cooling cylinder 1-7. In the present embodiment, the gases at high pressure that molding sand is passed into by three ajutage 1-8 in cooling cylinder 1-7 blow afloat, molding sand can not only be made fully to spread its heat transfer effect of raising, make the dust in molding sand fully be kicked up simultaneously, be conducive to the dust shield 1-9 that cooling cylinder 1-7 exit is provided above all to be siphoned away by the dust in molding sand.

Second elevator 1-10 is positioned at the side in cooling cylinder 1-7 exit, and the second elevator 1-10 is for being promoted to conveyer belt 1-11 by the molding sand that cooling cylinder 1-7 exit flows down; Conveyer belt 1-11 is positioned at above at least three casting bed 1-12, conveyer belt 1-11 is for being delivered in each casting bed 1-12 by molding sand, conveyer belt 1-11 is adopted to carry molding sand cost low, and sandbox 1-13 can be arranged below according to what molding sand was delivered to certain specific casting bed 1-12, casting bed 1-12 by real needs; For the ease of the transport of sandbox 1-13, bottom sandbox 1-13, it is provided with pulley, between the lower section and fence 1-1 of each casting bed 1-12, is equipped with one for the sandbox 1-13 track slided. The lower section of each casting bed 1-12 is equipped with three-dimensional vibrating-compaction table, in modeling process, sandbox 1-13 and three-dimensional vibrating-compaction table are fixed together, three-dimensional vibrating-compaction table is used for vibrating sandbox 1-13, owing to three-dimensional vibrating-compaction table can all produce vibration in three mutually orthogonal directions, therefore the vibrating effect of three-dimensional vibrating-compaction table becomes apparent from, and is conducive to improving the quality of foundry goods final molding.

Sand preparing system also includes vacuum distribution 1-14, and this vacuum distribution 1-14 is provided with multiple access port, and this access port is connected with the vacuum orifice on sandbox 1-13 by pipeline; Vacuum distribution 1-14 is connected with vaccum-pumping equipment, and this vaccum-pumping equipment includes vacuum pump, gas tank and water tank; In the present embodiment, the setting of vacuum distribution 1-14 makes a vaccum-pumping equipment can carry out evacuation process to multiple sandbox 1-13 simultaneously, improves the work efficiency of vaccum-pumping equipment, reduces production cost.

In the present embodiment, in order to improve the working environment at scene, avoiding dust pollution, above fence 1-1, above vibrosieve, above (not shown), each casting bed 1-12, (not shown) is provided with dust shield 1-9, to remove the dust in air.

In the present embodiment, dust shield 1-9 is all connected with cleaner, this cleaner includes cyclone dust extractor, sack cleaner and dedusting fan, and dust shield 1-9 is connected with the entrance of cyclone dust extractor, and the outlet of cyclone dust extractor is connected with dedusting fan by sack cleaner; Wherein, dedusting fan provides suction, and the systemic dust laden air of dust shield 1-9 first passes through cyclone dust extractor and removes oarse-grained dust, avoids bulky grain dust to the abrasion of cloth bag on sack cleaner simultaneously, cloth bag is played a protective role;Being then passed through sack cleaner and remove short grained dust, the air after dedusting eventually passes dedusting fan and discharges; In the present embodiment, cleaner adopts two-stage dedusting, and dust removing effects is better.

In the present embodiment, on upper oscillating screen plate 1-2, position the closer to the first direction, elevator 1-4 place, the time that material is vibrated herein above is more of a specified duration, therefore go up on oscillating screen plate 1-2, position the closer to the first direction, elevator 1-4 place, large granular impurity is more easily shattered into little granule with out-of-size molding sand and falls on the lower oscillating screen plate 1-3 of lower section, and the through-hole aperture on upper oscillating screen plate 1-2 is designed as to the other end in the first direction, elevator 1-4 place from certain one end by the present embodiment and is gradually reduced, then can be prevented effectively from the appearance of the problems referred to above.

In sum, the sand preparing system in the present embodiment, its smart structural design, manufactures and operating cost is relatively low.

Step ST9, casting cleaning;

In step ST9, the molding sand of cast(ing) surface is removed, and the ingate coagulum that foundry goods both sides are connected is knocked out, polishes totally.

Step ST10, heat treatment;

In step ST10, foundry goods is put into heating furnace, through 4.5h constant-speed heating to 945 DEG C, then it is incubated 2h, is cooled to 865 DEG C then through 1h, come out of the stove air cooling, wherein, during air cooling, foundry goods is put and vibrate on a vibration table, and in the horizontal direction to vibration table air blast, the uniform through hole in vibration table surface, the height of foundry goods vibration is 15��25mm.

In the present embodiment, foundry goods is put and is vibrated air quenching on a vibration table, and during air quenching, foundry goods can leave vibration table so that the whole outer surface of foundry goods all obtains uniform hardening, it is possible to the quenching problem of non-uniform existed when solving current wear resistance castings air quenching; Wherein, the uniform through hole in vibration table surface, form the air flue of up/down perforation, it is ensured that foundry goods multiaspect is subject to the effect of air quenching.

Technology for Heating Processing in the present embodiment, compares Technology for Heating Processing of the prior art, it is possible to be obviously improved the hardness of foundry goods, foundry goods is after the Technology for Heating Processing in the present embodiment processes, its HRC hardness is promoted to 60��65, and cast(ing) surface hardness is uniform, it is possible to better adapt to actually used demand.

The technique of the lost foam casting scraper wearing piece of the present embodiment, it is possible to be greatly promoted the castability of scraper wearing piece, and the disposable qualification rate of cast product reaches about 98%.

Embodiment 2

The technique of the lost foam casting scraper wearing piece of the present embodiment, its step is substantially the same manner as Example 1, and it is different in that:

Cross gate main body 104 top is provided with 8 inserting grooves 102 along its length equally spacedly; The thickness of drain block 201 is the 1/2 of grafting block 202 thickness; The width of grafting block 202 is more than the width 3mm of inserting groove 102.

Wear-resistant protective layer 13031 exceeds the upper surface 6mm of scraper body 1302; First inclined plane 13011 is 35 �� with horizontal angle; The angle of the second inclined plane 13012 and vertical line is 55 ��.

In step ST3, refractory aggregate accounts for the 18% of coating gross mass, and sodium carboxymethyl cellulose accounts for the 0.6% of coating gross mass, white glue with vinyl accounts for the 6% of coating gross mass, Ludox accounts for the 8% of coating gross mass, and sodium bentonite accounts for the 4% of coating gross mass, and polyacrylamide accounts for the 0.2% of coating gross mass.

In step ST4, with brush pen by coating thick to groove surfaces all of on foundry goods evaporative pattern 3 and one layer of 3mm of through-hole surfaces brush; In step ST8, the angle of lower oscillating screen plate 1-3 and horizontal plane is 5 ��;In step ST10, foundry goods is put into heating furnace, through 5h constant-speed heating to 950 DEG C, be then incubated 3h, be cooled to 860 DEG C then through 2h, air cooling of coming out of the stove.

Embodiment 3

In conjunction with Fig. 7��9, the technique of the casting lateral lobe sheet wearing piece of the present embodiment, its step is substantially the same manner as Example 1, it is different in that: Bai Mozhong prepared by step ST1, foundry goods evaporative pattern 3 is lateral lobe sheet evaporative pattern 23, this lateral lobe sheet evaporative pattern 23 includes side blade body 2302, first use portion 2301 and the second use portion 2305, first use portion 2301, second use portion 2305 lays respectively on two sides that side blade body 2302 is adjacent, in concrete-agitating process, first use portion 2301 contacts with side plate, second use portion 2305 and agitator contact internal walls, second use portion 2305 exceeds the upper surface of side blade body 2302, the outer wall in the second use portion 2305 is arcwall face, the design of arcwall face reduces the resistance that in concrete-agitating process, the second use portion 2305 outer wall is subject to, decrease the abrasion in the second use portion 2305, improve the service life of lateral lobe sheet, being provided with two lateral lobe sheet installing holes 2303 symmetrically before and after in side blade body 2302, this lateral lobe sheet installing hole 2303 is waist-shaped hole, for installing fixing by bolt by side blade body 2302, lateral lobe sheet installing hole 2303 be formed around one layer of lateral lobe sheet wear-resistant protective layer 23031, this lateral lobe sheet wear-resistant protective layer 23031 exceeds the upper surface 5��6mm (taking 5mm in concrete the present embodiment) of side blade body 2302, and the junction of lateral lobe sheet wear-resistant protective layer 23031 and side blade body 2302 adopts arc transition, the abrasion being designed to reduction junction of arc transition, strengthens the result of use of wear-resistant protective layer 3031.

The outer surface in the first use portion 2301 includes lateral lobe sheet the first inclined plane 23011, lateral lobe sheet the second inclined plane 23012, lateral lobe sheet the 3rd inclined plane 23013 and lateral lobe sheet the 4th inclined plane 23014, lateral lobe sheet the first inclined plane 23011 is the upper surface in the first use portion 2301, lateral lobe sheet the first inclined plane 23011 is downward-sloping, lateral lobe sheet the 4th inclined plane 23014 is the lower surface in the first use portion 2301, lateral lobe sheet the 4th inclined plane 23014 is downward-sloping, lateral lobe sheet the 3rd inclined plane 23013 is connected with lateral lobe sheet the 4th inclined plane 23014, and lateral lobe sheet the 3rd inclined plane 23013 is inclined upwardly, lateral lobe sheet the 3rd inclined plane 23013 and horizontal angle are 50��55 �� (taking 50 �� in concrete the present embodiment), lateral lobe sheet the 3rd inclined plane 23013 is connected by lateral lobe sheet the second inclined plane 23012 with lateral lobe sheet the first inclined plane 23011, and the angle of lateral lobe sheet the second inclined plane 23012 and lateral lobe sheet the 3rd inclined plane 23013 is 90 ��. in the present embodiment, the outer surface in the first use portion 2301 is made up of multiple inclined planes, adopts the first use portion 2301 of unique texture in the present embodiment can be obviously improved its serviceability and service life. secondly, in order to alleviate the weight of blade body 2302 on rear side of casting, reduce manufacturing cost, the side in the non-first use portion 2301 of side blade body 2302 and the second use portion 2305 is provided with the loss of weight breach 2304 of circular arc. in order to improve the mixing effect of lateral lobe sheet, shorten mixing cycle, side blade body 2302 is provided with baffle plate 2306, this baffle plate 2306 exceeds the upper surface of side blade body 2302, and baffle plate 2306 and the second use portion 2305 are oppositely arranged, in concrete-agitating process, the setting of baffle plate 2306 adds the amount of agitation of lateral lobe sheet, make once stirring that more concrete can be driven to move, in identical mixing time, it is more uniform that concrete is stirred, therefore shorten concrete mixing cycle, reduce production cost.

Embodiment 4

The technique of the casting lateral lobe sheet wearing piece of the present embodiment, its step is substantially the same manner as Example 3, and it is different in that: lateral lobe sheet wear-resistant protective layer 23031 exceeds the upper surface 6mm of side blade body 2302; Lateral lobe sheet the 3rd inclined plane 23013 and horizontal angle are 55 ��.

Embodiment 5

In conjunction with Figure 10��12, the technique of the casting Leaf wearing piece of the present embodiment, its step is substantially the same manner as Example 1, it is different in that: Bai Mozhong prepared by step ST1, and foundry goods evaporative pattern 3 is Leaf evaporative pattern 33, and this Leaf evaporative pattern 33 includes Leaf body 3302 and use portion 3301, Leaf body 3302 is T-shaped structure, the rear side of Leaf body 3302 is provided with use portion 3301, in concrete-agitating process, and use portion 3301 and agitator contact internal walls; This use portion 3301 exceeds the upper surface of Leaf body 3302, the junction of use portion 3301 and Leaf body 3302 is arc transition, the design of arc transition reduces the resistance that in concrete-agitating process, use portion 3301 outer wall is subject to, decrease the abrasion in use portion 3301, improve the service life of Leaf; Being provided with two Leaf installing holes 3303 symmetrically before and after on Leaf body 3302, this Leaf installing hole 3303 is circular port, for installing fixing by bolt by Leaf body 3302; Leaf installing hole 3303 be formed around one layer of Leaf wear-resistant protective layer 33031, this Leaf wear-resistant protective layer 33031 exceeds the upper surface 5��6mm (taking 5mm in concrete the present embodiment) of Leaf body 3302; And the junction of Leaf wear-resistant protective layer 33031 and Leaf body 3302 adopts arc transition, the abrasion being designed to reduction junction of arc transition, strengthen the result of use of Leaf wear-resistant protective layer 33031.

The upper surface of Leaf body 3302 front portion, lower surface are all to tilting therebetween, and the angle of Leaf body 3302 front upper surface and lower surface is ��=10��11 �� (taking 10 �� in concrete the present embodiment); Adopt the Leaf body 3302 of unique texture in the present embodiment can be obviously improved its serviceability and service life. Secondly, in order to alleviate the weight of Leaf body 3302 after casting, reduce manufacturing cost, Leaf body 3302 is designed as T-shaped structure by the present embodiment, Leaf body 3302 is symmetrically provided with two Leaf lightening grooves 3304, under the premise ensureing Leaf body 3302 structural strength, alleviate the weight of Leaf body 3302.

Existing Leaf is in concrete-agitating process, and the stirring between concrete has very big resistance, have very big deterioration at work, especially the installing hole place on Leaf, the bolt in installing hole can be made damaged, in actual engineer applied, tend to cause the generation of the accidents such as Leaf installation is insecure or directly comes off, reduce the service life of Leaf, thus adding the loss of wearing piece. in order to overcome disadvantages mentioned above, in the present embodiment: Leaf installing hole 3303 be formed around one layer of Leaf wear-resistant protective layer 33031, this Leaf wear-resistant protective layer 33031 exceeds the upper surface of Leaf body 3302 and has certain thickness, Leaf installing hole 3303 is played significant protective effect, when Leaf works, after Leaf wear-resistant protective layer 33031 is worn loss completely, just Leaf installing hole 3303 can be formed abrasion, such design protects Leaf installing hole 3303 and interior bolt thereof significantly, improve the service life of Leaf, thus reducing the loss of wearing piece.

Embodiment 6

The technique of the casting Leaf wearing piece of the present embodiment, its step is substantially the same manner as Example 5, and it is different in that: Leaf wear-resistant protective layer 33031 exceeds the upper surface 6mm of Leaf body 3302; The angle of Leaf body 3302 front upper surface and lower surface is 11 ��.

Schematically this utility model and embodiment thereof being described above, this description does not have restricted, and shown in accompanying drawing is also one of embodiment of the present utility model, and actual structure is not limited thereto. So, if those of ordinary skill in the art is enlightened by it, when creating objective without departing from this utility model, design the frame mode similar to this technical scheme and embodiment without creationary, protection domain of the present utility model all should be belonged to.

Claims (10)

1. sand preparing system in a lost foam casting, it is characterized in that: described sand preparing system includes fence (1-1), vibrosieve, first elevator (1-4), cooling cylinder (1-7), dust shield (1-9), second elevator (1-10), conveyer belt (1-11), casting bed (1-12) and sandbox (1-13), described fence (1-1) be arranged below vibrosieve, this vibrosieve includes the upper oscillating screen plate (1-2) being all connected with vibrating motor, lower oscillating screen plate (1-3), on upper oscillating screen plate (1-2) and lower oscillating screen plate (1-3), under be arranged in parallel, being evenly equipped with through hole on described upper oscillating screen plate (1-2), the two ends of upper oscillating screen plate (1-2) are equipped with baffle plate, one end of described lower oscillating screen plate (1-3) is provided with baffle plate, and the other end is to the inclined downward in the first elevator (1-4) direction, place, described first elevator (1-4) is positioned at the side of lower oscillating screen plate (1-3), first elevator (1-4) for the molding sand flowed down on lower oscillating screen plate (1-3) being promoted to cooling cylinder (1-7) porch, cooling cylinder (1-7) exit be arranged over dust shield (1-9), described second elevator (1-10) is positioned at the side in cooling cylinder (1-7) exit, and the second elevator (1-10) is for being promoted to conveyer belt (1-11) by the molding sand that cooling cylinder (1-7) exit flows down, described conveyer belt (1-11) is positioned at least three casting bed (1-12) top, conveyer belt (1-11) for molding sand is delivered in casting bed (1-12), casting bed (1-12) be arranged below sandbox (1-13).

2. sand preparing system in lost foam casting according to claim 1, it is characterized in that: described sand preparing system also includes vacuum distribution (1-14), this vacuum distribution (1-14) is provided with multiple access port, and this access port is connected with the vacuum orifice on sandbox (1-13) by pipeline; Described vacuum distribution (1-14) is connected with vaccum-pumping equipment.

3. sand preparing system in lost foam casting according to claim 1, it is characterized in that: described cooling cylinder (1-7) porch is provided with magnetic separator (1-5), this magnetic separator (1-5) is for carrying out magnetic separation process by the molding sand entered in cooling cylinder (1-7).

4. sand preparing system in lost foam casting according to claim 1, it is characterized in that: described cooling cylinder (1-7) bottom surface is connected with three ajutages (1-8) respectively, above three ajutage (1-8) is equidistantly distributed along cooling cylinder (1-7) length direction and is all connected with the air outlet of high pressure positive blower (1-6); Being surrounded with cooling water coil on the inwall of described cooling cylinder (1-7), position, the axis erection of cooling cylinder (1-7) inside has helical form cooling water pipe.

5. sand preparing system in lost foam casting according to claim 1, it is characterised in that: above described fence (1-1) top, vibrosieve, above each casting bed (1-12), it is provided with dust shield (1-9).

6. sand preparing system in lost foam casting according to claim 5, it is characterized in that: described dust shield (1-9) is all connected with cleaner, this cleaner includes cyclone dust extractor, sack cleaner and dedusting fan, described dust shield (1-9) is connected with the entrance of cyclone dust extractor, and the outlet of cyclone dust extractor is connected with dedusting fan by sack cleaner.

7. sand preparing system in lost foam casting according to claim 1, it is characterised in that: the angle of described lower oscillating screen plate (1-3) and horizontal plane is 4��5 ��.

8. sand preparing system in lost foam casting according to claim 1, it is characterised in that: the through-hole aperture on described upper oscillating screen plate (1-2) is gradually reduced to the other end in the first elevator (1-4) direction, place from certain one end.

9. sand preparing system in lost foam casting according to claim 1, it is characterised in that: it is equipped with a track slided for sandbox (1-13) between lower section and the fence (1-1) of each casting bed (1-12).

10. sand preparing system in lost foam casting according to claim 1 and 2, it is characterised in that: the lower section of each casting bed (1-12) is equipped with three-dimensional vibrating-compaction table.