CN106734912B

CN106734912B - A kind of method of lost foam process casting scraper wearing piece

Info

Publication number: CN106734912B
Application number: CN201611204321.9A
Authority: CN
Inventors: 王大志
Original assignee: Maanshan Sanfeng Machinery Manufacturing Co Ltd
Current assignee: Maanshan Sanfeng Machinery Manufacturing Co Ltd
Priority date: 2015-12-29
Filing date: 2015-12-29
Publication date: 2018-08-28
Anticipated expiration: 2035-12-29
Also published as: CN107096887A; CN106734912A; CN107096887B; CN106583650A; CN106583650B; CN105499504A; CN105499504B

Abstract

The invention discloses a kind of methods that lost foam process casts scraper wearing piece, belong to lost foam casting process field.The present invention includes the following steps, step ST1, prepares white mould；Step ST2, white mould is assembled；Step ST3, coating is prepared；Step ST4, swabbing；Step ST5, dip-coating material；Step ST6, moulding；Step ST7, it pours into a mould；Step ST8, molding sand recycles；Step ST9, casting cleaning；Step ST10, it is heat-treated.Scraper evaporative pattern includes scraper body and scraping the edge of a knife, scrapes the side that the edge of a knife is located at scraper body, and front and back on scraper body symmetrically to set there are two scraper mounting hole, which is waist-shaped hole；Scraper mounting hole is surrounded by one layer of wear-resistant protective layer, which is higher by the upper surface of scraper body, and the junction of wear-resistant protective layer and scraper body uses arc transition.The present invention mainly realizes the function of promoting scraper wearing piece castability.

Description

A kind of method of lost foam process casting scraper wearing piece

Present patent application be for application No. is：2015110171684 divisional application, the applying date of original application For：2015-12-29, invention and created name are：A kind of technique of lost foam casting scraper or lateral lobe piece or middle blade wearing piece.

Technical field

The present invention relates to a kind of lost foam casting process, resistance to more specifically to a kind of lost foam process casting scraper The method for grinding part.

Background technology

Technology of EPC is that foamed plastic model identical with casting dimension shape bonding is combined into model cluster, is brushed After applying refractory coating and drying, it is embedded in vibration molding in drystone sand, pours into a mould liquid metals under certain condition, model is made to gasify And modal position is occupied, the method that required casting is formed after solidification is cooling.Compared with traditional foundry engieering, due to using easily The foamed plastics of gasification makes model, without modulus with make mold core, without die joint, thus non-trimming burr, the technical process Traditional handicraft complex procedures have been abandoned completely, the unfavorable factor that course of work pollutant discharge amount is big, labor intensity is high, it is real Existing is that a kind of process is simple, efficient, nearly non-harmful clean manufacturing.

Lost foam casting field needs to use cross gate and ingate, ingate and casting evaporative pattern in casting process It is connected, so that cast casting is molded for draining into liquid metals in casting evaporative pattern；Cross gate disappears for connecting multiple casting Lose mould so that once-cast being capable of the multiple casting of casting and forming.But the manufacturer of lost foam casting process in the prior art In order to follow the line of least resistance, often individually purchase foam board cuts to form cross gate so that cross gate and ingate are split type, are being poured It needs cross gate and ingate being glued together by glue before casting, this way had not only taken a lot of work laborious but also virtually increased production Cost, and cross gate often bonds insecure with ingate, is susceptible in the handling process or during sandbox note sand jolt ramming Obscission reduces casting quality, meanwhile, the generally rectangular cross-section long slab of cross gate is unfavorable for the flowing of liquid metals.Secondly, Often Design of Gate is connected to for a small rectangular block on casting evaporative pattern in the prior art, to molding after casting complete Casting when being cleared up, need the ingate coagulum that will be connected on casting to knock out, polishing, but since ingate solidifies In cast it is common molding with casting ontology, often results in and knock out in ingate process of setting, be not ingate coagulum It leaves one section to be difficult to clean off on casting ontology, casting ontology with ingate coagulum junction nearby also struck down by part Come, not only takes work consuming, and seriously affect the quality of casting, increase casting defect rate.

About lost foam casting process, has related art scheme in the prior art and disclose, such as patent publication No.：CN 104690225 A, publication date：On June 10th, 2015, invention and created name are：A kind of disappearance molding of casting good mechanical property Technique is made, this application discloses a kind of lost foam casting process of casting good mechanical property, include the following steps：Using foaming Each critical piece is made in material piecemeal, and casting evaporative pattern is made in manufactured each critical piece bonding；It is viscous for casting evaporative pattern Running channel is closed, and final mask is made in casting evaporative pattern and running channel outer application refractory material；Final mask is put into sandbox, Filling dry sand covers plastic foil using three-dimensional vibrating-compaction table jolt ramming on sandbox；It is uniformly passed through into sandbox from top to down negative Calm the anger and flow to negative pressure and reach -0.04~-0.08MPa, the negative pressure gas flow using oxygen, nitrogen, carbon dioxide mixed gas；It will Molten metal is poured into the region corresponded in sandbox where final mask, and final mask gasification disappears, the final mould of metal replacement Type obtains casting after cooling.But it bonds and connects again by glue between this application medium casting evaporative pattern and cross gate Together, the problems such as still will appear influence group mould time, casting quality.

The technique of lost foam casting process includes white area, black area and yellow area technique, in existing Technology of EPC, Black area is the process for carrying out sand processing, by the way that the molding sand well sand preparing system after use is screened, after the processing such as dedusting again Raw reuse, main function are：Screen out impurity in molding sand (sundries such as sand lump, scum, coating dust), cooling, conveying and storage Molding sand.From the point of view of the casting technique of evaporative pattern and to the requirement of equipment, dry sand inevitably has in moulding use and cyclic process Broken and dusting, meanwhile, the coating dust decomposed in casting process can be also mixed into wherein, can deteriorate the performance of molding sand, be reduced saturating Gas consumes more binders, it is therefore desirable to remove the broken dust for decomposing and being formed with dusting and coating of molding sand.Separately Outside, molding sand demoulding after initial temperature it is very high, usually have 200~500 DEG C, evaporative pattern production in, sand when the temperature is excessively high, Film can be scorched in modeling process or cause film warpage, therefore before moulding, sand temperature should control as possible 55 DEG C with It is lower just to reuse, it is therefore desirable to which that efficient cooling equipment could be realized.Therefore, the disappearance of sand preparing system is not configured Die cast technique, it is difficult to show the excellent feature of lost foam casting production environment and ensure the stability of product quality.It is existing Lost foam casting process in generally configure sand preparing system, but existing sand preparing system is often complicated, manufacture and Operating cost is higher.

Through retrieval, application publication number：103909216 A of CN, publication date：On July 9th, 2014, invention and created name are： A kind of Lost Form Casting Production Line sand preparing system, this application discloses a kind of evaporative pattern sand preparing system, including knockout are clear Reason system, ash disposal cooling system select sand system, sand transport system, center sand storage, intermediate sand storage, filling moulding system, dedusting system System, control system, sand transport system are made of four conveying devices, and peeling system passes through the first conveying device and intermediate sand Library connects, and intermediate sand storage is connected by the second conveying device with ash disposal cooling system, and ash disposal cooling system is conveyed by third Device is connected with sand system is selected, and sand system is selected to be connected respectively with center sand storage and filling moulding system by the 4th conveying device It connects, dust pelletizing system and control system and peeling system, ash disposal cooling system select sand system, sand transport system, center sand Library, intermediate sand storage, filling moulding system, are respectively connected with.But the sand preparing system of this application is complicated, manufacture and Operating cost is higher.

Blender is widely used general, can be applied to building field, field of environment protection etc., essential element in blender Including scraper and paddle (paddle generally comprises the lateral lobe piece being applied in combination and middle blade), they rise emphatically in blender The effect wanted, scraper and paddle generally use lost foam casting process to manufacture, and are used as wearing piece.In engineer application, Because existing scraper and paddle are in concrete whipping process, the stirring between concrete has prodigious resistance, in work It is had in work at the mounting hole on prodigious deterioration, especially scraper and paddle, the bolt in mounting hole can be made broken It damages, in actual engineer application, tends to that scraper and paddle is caused to install insecure or even directly fall off, reduce scraper With the service life of paddle, to increase the loss of wearing piece.

Through retrieval, Chinese Patent Application No.：2010201484235, publication date：On December 1st, 2010, invention and created name For：A kind of scraper, this application discloses a kind of scrapers, including scrape cutter hub, scrape one end of cutter hub equipped with the edge of a knife is scraped, the other end is set There is handle of a knife, the outer surface for scraping the edge of a knife is welded with one layer of compound carbonizing chromium and carbonization niobium alloy, scrapes the edge of a knife and is all wrapped in alloy-layer Interior, the two sides for scraping cutter hub and handle of a knife are welded with latticed alloy, and latticed alloy and the alloy for scraping the edge of a knife are connected with each other, scrape The material of cutter hub is manganese steel or ordinary carbon steel；Compared with the existing technology, this application makees scraper using manganese steel or ordinary carbon steel Matrix, and make wearing layer in matrix surface welding compound carbonizing chromium and carbonization niobium alloy, than the wear-resisting property of conventional cast scraper 2~3 times are improved, extends the service life of scraper, but the through-hole that handle of a knife surface is provided in this application is still easy to be ground Damage loss can cause scraper to install insecure or the accidents such as fall off from mixing arm generations, reduce the service life of scraper, To increase the loss of wearing piece.

Chinese Patent Application No.：2010206563252, publication date：On August 24th, 2011, invention and created name are：Coagulation The paddle of native blender includes T-shaped blade, leaf this application discloses a kind of paddle of concrete mixer On piece is equipped with twice bar shaped slideway, and mounting hole is respectively equipped between twice bar shaped slideway, is respectively equipped on the outside of twice bar shaped slideway Groove.The paddle of this application is reasonable in design, weight saving, easy for installation with other component cooperation, improves stirring Efficiency.But the mounting hole being equipped between twice bar shaped slideway in this application is still easy the loss that is worn, and can cause to stir Leaf installs insecure or the accidents such as directly fall off generations, the service life of paddle is reduced, to increase wearing piece Loss.

Invention content

1. technical problems to be solved by the inivention

It is an object of the invention to overcome above-mentioned deficiency in the prior art, a kind of lost foam process casting scraper is provided The method of wearing piece mainly realizes the function of promoting scraper wearing piece castability.

2. technical solution

In order to achieve the above objectives, technical solution provided by the invention is：

The technique of the lost foam casting wearing piece of the present invention, includes the following steps,

Step ST1, white mould is prepared；

Using expandable polystyrene as raw material, raw material is put into pre-foaming machine, is passed through 70~100 DEG C of 2~5 points of steam Clock carries out prefoam so that the foam volume obtained after prefoam increases to 5~10 times before prefoam；

The foam obtained after prefoam is rushed in mold using compressed air, 50~100 DEG C of steaming is passed through into mold Vapour, foaming obtain Bai Mo；

It is passed through cooling water from top to bottom into mold, waits for that the upper mold by mold is opened after the mold is cooled, then certainly into mold It is passed through compressed air on down, white mould is ejected out of mold；

Wherein, the white mould includes cross gate, ingate and casting evaporative pattern.

Step ST2, white mould is assembled；

Step ST3, coating is prepared；

Step ST4, swabbing；

Step ST5, dip-coating material；

Step ST6, moulding；

Step ST7, it pours into a mould；

Step ST8, molding sand recycles；

Step ST9, casting cleaning；

Step ST10, it is heat-treated.

As Bai Mozhong prepared by further improvement of the present invention, step ST1, the cross gate is strip, horizontal to pour Road includes cross gate main body, which is equipped with drainage muscle, cross gate body top along its length It is also equally spacedly equipped with several inserting grooves along its length, the both sides of the drainage muscle symmetrically offer weight loss groove；

The casting evaporative pattern and ingate are integrally formed, and the both sides of casting evaporative pattern are symmetrically equipped with ingate, The ingate includes that drainage block and grafting block, the drainage block and grafting block are mutually perpendicular to collectively form L-shaped structure, drains block Thickness is less than the thickness of grafting block, and drainage block is connected with casting evaporative pattern, and grafting block with above-mentioned inserting groove for matching；

The intersection of the weight loss groove and inserting groove uses arc transition；The cross gate body top is along its length etc. It is equipped with 3~8 inserting grooves to spacing；The thickness of the drainage block is the 1/4~1/2 of grafting block thickness；

The length direction of the inserting groove is parallel to cross gate body width direction, and the inserting groove is by two side and rear wall group At；It is rectangular block to drain block and grafting block, and the inserting groove is the rectangular channel of one end open；

The width of the grafting block is equal with the drainage width of block, the width of grafting block be more than the width 2 of inserting groove~ 3mm, the thickness of grafting block are equal to the depth of inserting groove；

The both sides of the drainage muscle one end are equipped with link block, which will drain side and the cross gate master of muscle end Body is connected.

As further improvement of the present invention, in step ST2, two cross gates are vertically arranged so that two horizontal to pour Inserting groove on road is facing each other, and 3~8 casting evaporative patterns are located between two cross gates, and between adjacent casting evaporative pattern At least at a distance of 5mm, the ingate of casting evaporative pattern both sides is matched with the cross gate of respective side respectively, obtains white mould assembly.

As further improvement of the present invention, in step ST3, by refractory aggregate, organic binder, anhydrous adhesive, Suspending agent, thickening stabilizing agent, antifoaming agent and preservative are uniformly mixed and obtain coating, wherein：Refractory aggregate accounts for the total matter of coating The 17~18% of amount, refractory aggregate are the mixture of brown alundum powder and silica flour, and the grain size of the brown alundum powder and silica flour is equal More than 300 mesh；Organic binder is the mixture of sodium carboxymethylcellulose and white glue with vinyl, and the sodium carboxymethylcellulose accounts for painting Expect the 0.2~0.6% of gross mass, white glue with vinyl accounts for the 3~6% of coating gross mass, contains mass percent in the white glue with vinyl 20% polyvinyl alcohol；Anhydrous adhesive is Ludox, and the Ludox accounts for the 3~8% of coating gross mass；Suspending agent is sodium base Bentonite, the sodium bentonite account for the 1~4% of coating gross mass；Thickening stabilizing agent is polyacrylamide, the polyacrylamide Amine accounts for the 0.1~0.2% of coating gross mass.

As further improvement of the present invention, in step ST4, with writing brush by groove surfaces all on casting evaporative pattern And the coating of one layer of 2~3mm thickness of through-hole surfaces brush, drying；

In step ST5, prepare white mould assembly, the cross gate that casting evaporative pattern both sides are vertically arranged is passed through into rope respectively It is bundled in the two side arms of fixed frame, the fixed frame is rectangular frame；Then fixed frame is integrally immersed in coating pond, is taken out Fixed frame is dried；Fixed frame is integrally immersed in coating pond again, fixed frame is taken out and dries again；

In step ST6, a stratotype sand first is spread in sandbox bottom, using three-dimensional vibrating-compaction table jolt ramming, shakes smooth, white module is filled Body is removed from fixed frame, then white mould assembly is hung middle part in sandbox, by the uniform velocity adding in the sandbox of casting bed downwards Sand simultaneously vibrates sandbox, and the amplitude of sandbox is 0.2~0.4mm, stops adding sand when molding sand 10~20mm suitable for reading from sandbox, stop Stop vibration after adding 30~45s of sand, plastic film is then laid at the top of sandbox, dry sand gland plastic film is used in combination, places Sprue cup, it is to be cast；

In step ST7, pouring temperature control is 1350~1400 DEG C, control negative pressure value 0.015 in sandbox when cast~ 0.025MPa after being poured, crosses 6~7min and removes vacuum；

In step ST9, the molding sand of cast(ing) surface is removed, and the ingate coagulum that casting both sides are connected is knocked out, is beaten Mill is clean.

As further improvement of the present invention, in step ST8, molding sand recycling is carried out using sand preparing system, by sandbox It moves on fence and mould turnover, casting is intercepted by fence, molding sand is dropped down onto by the through-hole on fence on upper oscillating screen plate, with above shaking The vibration of dynamic sieve plate, the molding sand of size qualification are fallen by the through-hole on upper oscillating screen plate on lower oscillating screen plate, impurity and size Underproof molding sand is left on oscillating screen plate；Molding sand on lower oscillating screen plate is promoted to cooling cylinder by the first elevator and enters Mouthful place, and magnetic separation processing is carried out in cooling cylinder inlet, magnetic separation treated molding sand enters cooling, dedusting in cooling cylinder, cool down, Molding sand after dedusting passes sequentially through the second elevator, conveyer belt is delivered in each casting bed, completes molding sand removal process；

Wherein, the sand preparing system includes fence, vibrating screen, the first elevator, cooling cylinder, dust hood, the second promotion Vibrating screen is arranged in the lower section of machine, conveyer belt, casting bed and sandbox, the fence, which includes being connected with vibrating motor Upper oscillating screen plate, lower oscillating screen plate, upper oscillating screen plate and lower oscillating screen plate are arranged in parallel above and below；On the upper oscillating screen plate It is furnished with through-hole, the both ends of upper oscillating screen plate are equipped with baffle；One end of the lower oscillating screen plate is equipped with baffle, and the other end is to first The inclined downward of elevator direction；First elevator is located at the side of lower oscillating screen plate, and the first elevator is used for will The molding sand flowed down on lower oscillating screen plate is promoted to cooling cylinder inlet, and the top in cooling cylinder exit is equipped with dust hood；Described Two elevators are located at the side in cooling cylinder exit, and the second elevator is defeated for the molding sand that cooling cylinder exit flows down to be promoted to It send and takes；The conveyer belt is located above at least three casting beds, used for conveyer belt to be delivered in casting bed in by molding sand, the lower section of casting bed It is provided with sandbox；

The sand preparing system further includes vacuum distribution, which is equipped with multiple access ports, the access port It is connected with the vacuum orifice on sandbox by pipeline；The vacuum distribution is connected with vaccum-pumping equipment；

The cooling cylinder inlet is equipped with magnetic separator, which carries out for that will enter the molding sand in cooling cylinder at magnetic separation Reason；

The cooling cylinder bottom surface is connected with three ajutages respectively, and above three ajutage is along cooling cylinder length direction etc. Spacing is distributed and is connected with the air outlet of high pressure positive blower；It is surrounded with cooling water coil on the inner wall of the cooling cylinder, It is provided with helical form cooling water pipe at axis line position inside cooling cylinder；

It is both provided with dust hood above the fence, above vibrating screen, above each casting bed；

The dust hood is connected with cleaner, which includes cyclone dust collectors, bag filter and remove Dirt wind turbine, the dust hood are connected with the entrance of cyclone dust collectors, the outlets of cyclone dust collectors by bag filter with remove Dirt wind turbine is connected；

The angle of the lower oscillating screen plate and horizontal plane is 4~5 °；

Through-hole aperture on the upper oscillating screen plate gradually subtracts from certain one end to the other end of the first elevator direction It is small；

It is equipped with a track slided for sandbox between the lower section and fence of each casting bed；

It is equipped with three-dimensional vibrating-compaction table below each casting bed.

As further improvement of the present invention, in step ST10, casting is put into heating furnace, it is even by 4.5~5h Speed is heated to 945~950 DEG C, then keeps the temperature 2~3h, is cooled to 860~865 DEG C using 1~2h, comes out of the stove air-cooled, wherein empty Casting is put when cold and is vibrated on a vibration table, and in the horizontal direction to shake table air blast, shake table surface is evenly distributed with through-hole, and casting shakes Dynamic height is 15~25mm.

The technique using above-mentioned lost foam casting wearing piece of the present invention casts the technique of scraper wearing piece, step ST1 The Bai Mozhong of preparation, the casting evaporative pattern are scraper evaporative pattern, which includes scraper body and scrape the edge of a knife, scraper Mouth is front and back on the side of scraper body, scraper body symmetrically to be set there are two scraper mounting hole, which is waist Type hole；Scraper mounting hole is surrounded by one layer of wear-resistant protective layer, which is higher by the upper surface of scraper body, and resistance to The junction for grinding protective layer and scraper body uses arc transition；

The outer surface for scraping the edge of a knife includes the first inclined surface, the second inclined surface, third inclined surface and the 4th inclined surface, institute It is the upper surface for scraping the edge of a knife to state the first inclined surface, and first tilts inclination, the second inclined surface upwardly connect with the first inclined surface, and Second inclined surface tilts down, and the 4th inclined surface is the lower surface for scraping the edge of a knife, and third inclined surface inclines the second inclined surface with the 4th Inclined-plane connects；

The rear and front end of the scraper body is symmetrically equipped with scraper weight loss groove；

First inclined surface and horizontal angle are 30~35 °, the angle of the second inclined surface and vertical line is 50~ 55°；The wear-resistant protective layer is higher by 5~6mm of upper surface of scraper body.

The technique using above-mentioned lost foam casting wearing piece of the present invention casts the technique of lateral lobe piece wearing piece, step Bai Mozhong prepared by ST1, the casting evaporative pattern are lateral lobe piece evaporative pattern, which includes side blade body, the One use portion and second uses portion, and described first is located at two adjacent sides of side blade body using portion, second using portion On face, described second is higher by the upper surface of side blade body using portion, and the outer wall in the second use portion is arcwall face；Side blade body It is symmetrically set before and after upper there are two lateral lobe piece mounting hole, which is waist-shaped hole；The surrounding of lateral lobe piece mounting hole is set There is one layer of lateral lobe piece wear-resistant protective layer, which is higher by the upper surface of side blade body, and lateral lobe piece is wear-resisting Protective layer and the junction of side blade body use arc transition；

Described first using the outer surface in portion includes the first inclined surface of lateral lobe piece, the second inclined surface of lateral lobe piece, lateral lobe piece The 4th inclined surface of three inclined surface and lateral lobe piece, first inclined surface of lateral lobe piece are the upper surface in the first use portion, lateral lobe piece the One inclined surface tilts down, and the 4th inclined surface of lateral lobe piece is the lower surface in the first use portion, and the 4th inclined surface of lateral lobe piece dips down Tiltedly, lateral lobe piece third inclined surface is connect with the 4th inclined surface of lateral lobe piece, and lateral lobe piece third is tilted and tilted upwardly, lateral lobe piece the Lateral lobe piece third inclined surface is connect by two inclined surface with the first inclined surface of lateral lobe piece；

The side in the side blade body non-first use portion and the second use portion is equipped with loss of weight notch；The lateral lobe piece Ontology is equipped with baffle, which is higher by the upper surface of side blade body, and baffle is oppositely arranged with second using portion；

The lateral lobe piece third inclined surface and horizontal angle are 50~55 °, second inclined surface of lateral lobe piece and side The angle of blade third inclined surface is 90 °；The lateral lobe piece wear-resistant protective layer is higher by 5~6mm of upper surface of side blade body.

The technique using above-mentioned lost foam casting wearing piece of the present invention is come the technique of blade wearing piece in casting, step Bai Mozhong prepared by ST1, the casting evaporative pattern are middle blade evaporative pattern, and blade evaporative pattern includes middle blade body and makes in this With portion, the middle blade body is T-shaped structure, and the rear side of middle blade body is equipped with the portion of using, this is higher by using portion The upper surface of middle blade body is arc transition using portion and the junction of middle blade body；It is front and back symmetrical in middle blade body Ground is set there are two middle blade mounting hole, and blade mounting hole is round hole in this；Middle blade mounting hole is surrounded by one layer of middle period Piece wear-resistant protective layer, blade wear-resistant protective layer is higher by the upper surface of middle blade body in this, and middle blade wear-resistant protective layer is in The junction of blade body uses arc transition；

Upper surface, the lower surface of the middle blade body portion are tilted between the two, middle blade body portion upper table The angle of face and lower surface is α；

The α is 10~11 °；The middle blade wear-resistant protective layer is higher by 5~6mm of upper surface of side blade body；

Middle blade weight loss groove there are two symmetrically being set in the middle blade body.

3. advantageous effect

Using technical solution provided by the invention, compared with prior art, there is following remarkable result：

(1) sand preparing system in the present invention, smart structural design, manufacture and operating cost are relatively low, include mainly following Advantageous effect：

1) oscillating screen plate and lower oscillating screen plate are obliquely installed on, after pending molding sand drops down onto on oscillating screen plate, are being vibrated Under the action of slowly moved to the first elevator direction, in molding sand moving process on one side filtered, on one side tiling come, keep away Exempted from because molding sand gathers immediately below fence always influence upper oscillating screen plate filter efficiency the problem of, and large granular impurity and Out-of-size molding sand is automatically sent at oscillating screen plate overhead gage, is handled convenient for centralized recovery；

2) molding sand is trapped among wherein by cooling water coil jointly with helical form cooling water pipe so that molding sand is blown in cooling cylinder It can fully be exchanged heat to any direction, greatly improve the cooling effect of cooling cylinder；

3) in order to improve scene working environment, avoid dust pollution, above fence, above vibrating screen, each casting bed Top is both provided with dust hood, to remove the dust in air；

4) cleaner includes cyclone dust collectors, bag filter and dedusting fan, and dedusting fan provides suction, dust hood Systemic dust laden air first passes through cyclone dust collectors and removes the dust of bulky grain, while avoiding bulky grain dust and being removed to cloth bag The abrasion of cloth bag, plays a protective role to cloth bag on dirt device；Then pass through bag filter and remove short grained dust, after dedusting Air finally pass through dedusting fan and be discharged, cleaner uses two-stage dedusting, and dust removing effects are more preferable；

5) on upper oscillating screen plate, closer to the position of the first elevator direction, material vibrated above when Between it is more long, therefore on upper oscillating screen plate, at the position of the first elevator direction, large granular impurity and off size The molding sand of lattice is easier to be shattered into little particle and falls on the lower oscillating screen plate of lower section, and will be on upper oscillating screen plate in the present invention Through-hole aperture be designed as being gradually reduced from certain one end to the other end of the first elevator direction, then can effectively avoid State the appearance of problem.

It (2), can be easily equidistant by multiple casting evaporative patterns by the cooperation of grafting block and inserting groove in the present invention Ground is mounted between two cross gates, and the multiple casting evaporative patterns of disposal pouring improve production efficiency.

(3) coating prepared in the present invention, at low cost, the white module that is bonded in that can be firm fills body surface face, with existing skill The coating used in art is compared, using the coating in invention so that the disposable percentage that falls off of casting finished products dope layer is into one Step improves, and smooth in appearance after casting molding, casting finished products qualification rate also significantly rises.

(4) in the present invention in step ST4, with writing brush by groove surfaces all on casting evaporative pattern and through-hole surfaces brush The coating of one layer of 2~3mm thickness can slow down the molten iron rate of set of the groove and through hole on casting evaporative pattern so that cast When casting evaporative pattern on groove and through hole molten iron rate of set and casting evaporative pattern on molten iron elsewhere condensation speed Degree keeps synchronizing, and effectively eliminates the internal stress of cast-internal formation after casting molding.

(5) medium casting of the present invention is put vibrates air quenching on a vibration table, and casting can leave shake table when air quenching so that casting Entire outer surface obtain uniform hardening, existing quenching problem of non-uniform when current wear resistance castings air quenching can be solved.

(6) technique of lost foam casting wearing piece of the invention, can greatly promote the castability of wearing piece, and casting The disposable qualification rate of product reaches 98% or so.

Description of the drawings

Fig. 1 is the main structure diagram of cross gate in the present invention；

Fig. 2 is the overlooking structure diagram of cross gate in the present invention；

Fig. 3 is that white mould assembly is bundled in the main structure diagram on fixed frame in the present invention；

Fig. 4 is the overlooking structure diagram of scraper evaporative pattern in the present invention；

Fig. 5 is the main structure diagram of scraper evaporative pattern in the present invention；

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

Fig. 7 is the overlooking structure diagram of lateral lobe piece evaporative pattern in the present invention；

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

Fig. 9 is the main structure diagram of lateral lobe piece evaporative pattern in the present invention；

Figure 10 is the overlooking structure diagram of middle blade evaporative pattern in the present invention；

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

Figure 12 is the schematic cross-sectional view along line D-D in Figure 10；

Figure 13 is the structural schematic diagram of sand preparing system in the present invention；

Figure 14 is the process flow chart of the lost foam casting scraper wearing piece of the present invention.

Label declaration in attached drawing：

1, cross gate；101, muscle is drained；102, inserting groove；103, weight loss groove；104, cross gate main body；2, ingate； 201, block is drained；202, grafting block；3, casting evaporative pattern；4, fixed frame；

13, scraper evaporative pattern；1301, the edge of a knife is scraped；13011, the first inclined surface；13012, the second inclined surface；13013, Three inclined surface；13014, the 4th inclined surface；1302, scraper body；1303, scraper mounting hole；13031, wear-resistant protective layer； 1304, scraper weight loss groove；

23, lateral lobe piece evaporative pattern；2301, first portion is used；23011, the first inclined surface of lateral lobe piece；23012, lateral lobe piece Two inclined surface；23013, lateral lobe piece third inclined surface；23014, the 4th inclined surface of lateral lobe piece；2302, side blade body；2303、 Lateral lobe piece mounting hole；23031, lateral lobe piece wear-resistant protective layer；2304, loss of weight notch；2305, second portion is used；2306, baffle；

33, middle blade evaporative pattern；3301, using portion；3302, middle blade body；3303, middle blade mounting hole；33031、 Middle blade wear-resistant protective layer；3304, middle blade weight loss groove；

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 hood；1-10, the second elevator；1-11, conveyer belt；1-12, sand Bed；1-13, sandbox；1-14, vacuum distribution.

Specific implementation mode

To further appreciate that present disclosure, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

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, including it is following Step,

Step ST1, white mould is prepared；

It is passed through cooling water from top to bottom into mold, waits for that the upper mold by mold is opened after the mold is cooled, then certainly into mold It is passed through compressed air on down, white mould is ejected out of mold；In the present embodiment, white mould is pushed up out of mold using compressed air Go out, can avoid the problem that fragile white mould when artificial modulus, improves qualification rate prepared by white mould.

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

Cross gate 1 is strip, and cross gate 1 includes cross gate main body 104,104 upper middle position of cross gate main body It is equipped with drainage muscle 101 along its length, 104 top of cross gate main body is also equally spacedly equipped with 3~8 inserting grooves along its length 102 (3 are taken in specific the present embodiment)；The length direction of inserting groove 102 is parallel to 104 width direction of cross gate main body, this is inserted Access slot 102 is made of two side and rear wall, forms the rectangular channel that one end is equipped with opening, suitable convenient for the grafting block 202 on ingate 2 It in the opening insertion rectangular channel of rectangular channel and is connected with it；The both sides of drainage muscle 101 symmetrically offer weight loss groove 103.

Casting evaporative pattern 3 and ingate 2 are integrally formed, ensure that molten iron can successfully pass through ingate 2 and flow into casting Part evaporative pattern 3, and without being bonded casting evaporative pattern 3 and ingate 2 by glue, it is time saving and energy saving；Casting evaporative pattern 3 Both sides are symmetrically equipped with ingate 2, which includes drainage block 201 and grafting block 202, drains block 201 and grafting block 202 It is rectangular block, the width of grafting block 202 is equal with the drainage width of block 201, drains block 201 and grafting block 202 is mutually perpendicular to L-shaped structure is collectively formed, drainage block 201 is connected with casting evaporative pattern 3, and the thickness of drainage block 201 is the 1/ of 202 thickness of grafting block 4~1/2 (taking 1/4 in specific the present embodiment)；Grafting block 202 with above-mentioned inserting groove 102 for matching.

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 grafting 2~3mm of width (taking 2mm in specific the present embodiment) of slot 102 so that grafting block 202 is squeezed into inserting groove 102, inserting groove 102 Grafting block 202 is fixed more securely with inserting groove 102 to be made to the squeezing action of its interior grafting block 202.The thickness of grafting block 202 Degree can be inserted into inserting groove 102 so that grafting block with agreeing with completely equal to the depth of inserting groove 102 convenient for grafting block 202 There are gaps between 202 and inserting groove 102, are conducive to molten iron smooth flow.

Cross gate and ingate are split type in the prior art, need cross gate and ingate passing through glue before casting It being glued together, this design charges expenses of labour power, production cost are higher and reduce casting quality, meanwhile, cross gate is generally rectangular cross-section Long slab is unfavorable for the flowing of molten iron；To overcome the above disadvantages, following improvement is made in the present embodiment：(1) pass through grafting block 202 with the cooperation of inserting groove 102, easily multiple casting evaporative patterns 3 equally spacedly can be mounted on two cross gates 1 it Between, the multiple casting evaporative patterns 3 of disposal pouring improve production efficiency；Cross gate 1 and ingate are connected by way of grafting 2, relative to the mode of glue bonding, operation is more convenient, therefore save trouble and labor, avoids the use of glue, therefore reduce Production cost；And the mode of grafting is more secured, is not easy to fall off in the handling process or during sandbox note sand jolt ramming Phenomenon substantially increases casting quality；(2) 104 upper middle position of cross gate main body is equipped with drainage muscle 101 along its length, Drainage muscle 101 plays drainage to molten iron, and molten iron can be drained into quickly in time along the length direction of drainage muscle 101 In each ingate 2 so that it is uniform that molten iron locates temperature at various locations, is easy to casting molding, improves yield rate；In order to ensure The both sides of molten iron good mobility in casting process, drainage muscle 101 symmetrically offer weight loss groove 103, weight loss groove 103 Design not only reduces the residue after cast, while reducing the resistance of molten iron flow, improves molten iron flow speed, favorably It is uniformly cooled down in molten iron, improves the molding quality of casting.

In order to enable molten iron more swimmingly to be flowed along 1 length direction of cross gate, in weight loss groove 103 and inserting groove 102 intersection uses arc transition (rather than right-angle structure), the streamlined structure of arc transition to design compared to right-angle structure Design, reduce the resistance of molten iron flow, improve the molding quality of casting.

The both sides for draining 101 one end of muscle are equipped with link block, which will drain side and the cross gate of 101 end of muscle Main body 104 is connected, and the setting of link block expands the cross section of 101 end of drainage muscle, molten iron from drain the end of muscle 101 into Enter, expands the circulation area that molten iron enters 101 end of drainage muscle, be conducive to molten iron smooth outflow.

Often Design of Gate is connected to for a small rectangular block on cast model in the prior art, after casting complete When clearing up molding casting, the ingate coagulum that will be connected on casting is needed to knock out, polish totally, but due to Ingate coagulum and casting ontology are common molding in cast, are often resulted in during knocking out ingate coagulum, no It is that ingate coagulum leaves one section and is difficult to clean off on casting ontology, is exactly that casting ontology and ingate coagulum junction are attached Near-end point also is struck, and is not only taken work consuming, and seriously affect the quality of casting, is increased casting defect rate.In order to overcome Disadvantages mentioned above makes following improvement in the present embodiment：Ingate 2 includes drainage block 201 and grafting block 202, drains block 201 and casting Part evaporative pattern 3 is connected, and for grafting block 202 for being matched with above-mentioned inserting groove 102, the thickness of drainage block 201 is that grafting block 202 is thick The 1/4~1/2 of degree, the thickness of drainage block 201 is smaller in the present embodiment, greatly facilitates the process for knocking out ingate coagulum, The segment thickness that i.e. ingate coagulum is connect with casting ontology is smaller, is easier the knockout from casting ontology and falls off and do not glue Band casting body part, it is more neat to knock out the part to fall off, and convenient for polishing, time and labour saving improves the presentation quality of casting；This Ingate 2 is designed as L-shaped in embodiment so that the L-shaped structure of ingate coagulum is easy stress, convenient for knocking out operation.

In specific the present embodiment, casting evaporative pattern 3 is scraper evaporative pattern 13, which includes scraper body 1302 and scrape the edge of a knife 1301, scrape the side that the edge of a knife 1301 is located at scraper body 1302, on scraper body 1302 before and after symmetrically set There are two scraper mounting hole 1303, which is waist-shaped hole, installs scraper body 1302 for passing through bolt On mixing arm；Scraper mounting hole 1303 is surrounded by one layer of wear-resistant protective layer 13031, which is higher by 5~6mm of upper surface (taking 5mm in specific the present embodiment) of scraper body 1302, and wear-resistant protective layer 13031 and scraper body 1302 junction uses arc transition, the design of arc transition that can reduce the abrasion of junction, enhances wear-resistant protective layer 13031 using effect.Incline including the first inclined surface 13011, the second inclined surface 13012, third the outer surface for scraping the edge of a knife 1301 Inclined-plane 13013 and the 4th inclined surface 13014, the first inclined surface 13011 are the upper surface for scraping the edge of a knife 1301, the first inclined surface 13011 tilt upwards, and the first inclined surface 13011 and horizontal angle are 30~35 ° (30 ° are taken in specific the present embodiment), the Two inclined surface 13012 are connect with the first inclined surface 13011, and the second inclined surface 13012 tilts down, the second inclined surface 13012 Angle with vertical line is 50~55 ° (50 ° are taken in specific the present embodiment)；4th inclined surface 13014 is to scrape under the edge of a knife 1301 Second inclined surface 13012 is connect by surface, third inclined surface 13013 with the 4th inclined surface 13014；The edge of a knife is scraped in the present embodiment 1301 outer surface is made of multiple inclined surface, is scraped the edge of a knife 1301 using unique texture in the present embodiment and can be obviously improved casting The performance and service life for the scraper wearing piece corresponding position produced.Secondly, resistance in order to mitigate scraper after casting and forming The weight of part is ground, manufacturing cost is reduced, scraper weight loss groove 1304 is symmetrically equipped in the rear and front end of scraper body 1302.

Existing scraper body designs for plane body, and in concrete whipping process, the stirring between concrete has very Big resistance is had at work at the mounting hole on prodigious deterioration, especially scraper, can make the spiral shell in mounting hole Bolt is damaged, in actual engineer application, tends to cause scraper to install insecure or the accidents such as fall off from mixing arm hairs It is raw, the service life of scraper is reduced, to increase the loss of scraper wearing piece.To overcome the above disadvantages, the present embodiment In make following improvement：Scraper mounting hole 1303 is surrounded by one layer of wear-resistant protective layer 13031, the wear-resistant protective layer 13031 It is higher by the upper surface of scraper body 1302 and there is certain thickness, significant protective effect is played to scraper mounting hole 1303, When scraper works, after wear-resistant protective layer 13031 is worn loss completely, scraper mounting hole 1303 can just be formed and be worn, Design protects scraper mounting hole 1303 and its interior fixing bolt significantly in this way, the service life of scraper is improved, to drop The low loss of scraper wearing piece.

Step ST2, white mould is assembled；

In step ST2, two cross gates 1 are vertically arranged so that the inserting groove 102 on two cross gates 1 is facing each other, 3 casting evaporative patterns 3 are located between two cross gates 1, meanwhile, inventor summarizes through many experiments and finds, adjacent casting disappears Between mould 3 at least casting final molding quality is just can guarantee at a distance of 5mm (taking 10mm in the present embodiment)；3 both sides of casting evaporative pattern Ingate 2 matched respectively with the cross gate of respective side 1, obtain white mould assembly.Since equidistantly distributed is inserted on cross gate 1 Access slot 102, therefore equidistantly distributed between adjacent casting evaporative pattern 3, are conducive to molten iron evenly in the length direction of cross gate 1 Flowing improves the molding quality of casting.

Step ST3, coating is prepared；

In step ST3, by refractory aggregate, organic binder, anhydrous adhesive, suspending agent, thickening stabilizing agent, antifoaming agent and Preservative is uniformly mixed and obtains coating, wherein：Refractory aggregate accounts for the 17~18% of coating gross mass (in specific the present embodiment Take 17%), refractory aggregate is the mixture of brown alundum powder and silica flour, the grain size of brown alundum powder and silica flour be 300 mesh with On；Organic binder is the mixture of sodium carboxymethylcellulose and white glue with vinyl, and sodium carboxymethylcellulose accounts for the 0.2 of coating gross mass ~0.6% (taking 0.2% in specific the present embodiment), what white glue with vinyl accounted for coating gross mass 3~6% (takes in specific the present embodiment 3%), the polyvinyl alcohol containing mass percent 20% in white glue with vinyl；Anhydrous adhesive is Ludox, and Ludox accounts for the total matter of coating 3~8% (taking 3% in specific the present embodiment) of amount；Suspending agent is sodium bentonite, and sodium bentonite accounts for the 1 of coating gross mass ~4% (taking 1% in specific the present embodiment)；Thickening stabilizing agent is polyacrylamide, and polyacrylamide accounts for the 0.1 of coating gross mass ~0.2% (taking 0.1% in specific the present embodiment).

In the present embodiment, the coating prepared using mentioned component is at low cost, and the white module that is bonded in that can be firm fills body surface Face, compared with the coating used in the prior art, using the coating in the present embodiment so that casting finished products dope layer it is disposable The percentage that falls off further increases, and smooth in appearance after casting molding, casting finished products qualification rate also significantly rises.

Step ST4, swabbing；

Groove and through hole on casting evaporative pattern 3 will appear following two problems in casting process：(1) casting disappears Groove and through hole on mould 3 are easy to be stained with sand after casting molding, are not easy to follow-up sand removal operation；(2) since casting disappears The molten iron circulation in cast of groove and through hole on mould 3 is slower, therefore molten iron temperature is relatively low herein when pouring into a mould so that The rate of set of molten iron is asynchronous with the rate of set of molten iron elsewhere (in synchronization casting evaporative pattern herein when cast The condensation degree of groove and through hole molten iron on 3 with it is inconsistent elsewhere), casting molding after, be easy in cast-internal shape Serious or even form crackle in cast(ing) surface at larger internal stress, this problem is always that perplex lost foam casting field more The technical barrier in year.Problem, universal resolving ideas are " post-processings " in view of the above technology in the prior art, work as cast-internal When forming larger internal stress because of above-mentioned reason, eliminated by subsequent heat treatment process, but do so and increase subsequent thermal The process of processing, increases manufacturing cost.The construction technology for how improving some step before cast or cast, accomplishes " thing Preceding prevention ", in the prior art never relevant technical solution or constitute technical inspiration correlation technology scheme.

In step ST4, with writing brush by one layer of 2~3mm of groove surfaces all on casting evaporative pattern 3 and through-hole surfaces brush The coating of (taking 2mm in specific the present embodiment) thickness, drying；In the present embodiment, groove table all on casting evaporative pattern 3 in advance Comparatively the coating of the one layer of 2~3mm thickness in face and through-hole surfaces brush makes groove surfaces all on casting evaporative pattern 3 and leads to The paint thickness of hole surface is more than the other parts on casting evaporative pattern 3, therefore, the groove in cast on casting evaporative pattern 3 Thermal coefficient between through hole and surrounding molding sand is smaller relative to the other parts on casting evaporative pattern 3, therefore can subtract The molten iron rate of set of groove and through hole on slow casting evaporative pattern 3 so that groove when cast on casting evaporative pattern 3 and logical At hole the rate of set of molten iron with the rate of set holding of molten iron is synchronous elsewhere on casting evaporative pattern 3, effectively eliminate casting The internal stress that cast-internal is formed after molding；The paint thickness of 3 upper groove surface of casting evaporative pattern and through-hole surfaces is thicker simultaneously, It is very unlikely to be stained with sand herein after casting molding, facilitates follow-up sand removal operation.It should be noted that inventor is by a large amount of scenes Experimental summary goes out, when 3 upper groove surface of casting evaporative pattern and the through-hole surfaces coating of one layer of 2~3mm thickness of brush in advance, Cai Nengbao Above-mentioned technique effect is demonstrate,proved, when coating is too thick or too thin, groove when cast cannot be effectively ensured on casting evaporative pattern 3 and logical At hole the rate of set of molten iron with the rate of set holding of molten iron is synchronous elsewhere on casting evaporative pattern 3.

Step ST5, dip-coating material；

In step ST5, prepare white mould assembly, the cross gate 1 that 3 both sides of casting evaporative pattern are vertically arranged is passed through into rope respectively Son is bundled in the two side arms of fixed frame 4, and fixed frame 4 is rectangular frame；Then it by the whole immersion coating pond of fixed frame 4, takes Go out the drying of fixed frame 4；Again by the whole immersion coating pond of fixed frame 4, takes out fixed frame 4 and dry again.It, will be white in the present embodiment It when mould assembly integrally coats coating, needs to be fixed white mould assembly by fixed frame 4, to protect white mould assembly Overall structure.

Step ST6, moulding；

In step ST6, first the bottoms sandbox 1-13 spread a stratotype sand, using three-dimensional vibrating-compaction table jolt ramming, shake it is smooth, by white mould Assembly is removed from fixed frame 4, then white mould assembly is hung middle part in sandbox 1-13, downwards by casting bed 1-12 At the uniform velocity add sand in sandbox 1-13 and vibrate sandbox 1-13, the amplitude of sandbox 1-13 is 0.2~0.4mm, until molding sand is from sandbox 1- Stop when 13 10~20mm suitable for reading plus sand, stopping stop vibration after adding 30~45s of sand, be then laid with plastics at the top of sandbox 1-13 Film is used in combination dry sand gland plastic film, places sprue cup, to be cast.

Step ST7, it pours into a mould；

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

Step ST8, molding sand recycles；

In step ST8, molding sand recycling is carried out using sand preparing system, sandbox 1-13 is moved to fence 1-1 on and mould turnover, is cast Part is intercepted by fence 1-1, and pending molding sand is dropped down onto by the through-hole on fence 1-1 on upper oscillating screen plate 1-2, with upper vibrating screen The molding sand of the vibration of plate 1-2, size qualification is fallen by the through-hole on upper oscillating screen plate 1-2 on lower oscillating screen plate 1-3, bulky grain 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 by first Machine 1-4 is promoted to the inlet cooling cylinder 1-7, and carries out magnetic separation processing in the inlet cooling cylinder 1-7, magnetic separation treated molding sand into Enter cooling, dedusting in cooling cylinder 1-7, molding sand cooling, after dedusting passes sequentially through the second elevator 1-10, conveyer belt 1-11 conveyings To in each casting bed 1-12, molding sand removal process is completed；

Wherein, sand preparing system include fence 1-1, vibrating screen, the first elevator 1-4, cooling cylinder 1-7, dust hood 1-9, Vibrating screen, the vibrating screen is arranged in the lower section of second elevator 1-10, conveyer belt 1-11, casting bed 1-12 and sandbox 1-13, fence 1-1 Including upper oscillating screen plate 1-2, the lower oscillating screen plate 1-3 being connected with vibrating motor, upper oscillating screen plate 1-2 and lower oscillating screen plate 1- 3 are arranged in parallel above and below；Through-hole is evenly equipped on upper oscillating screen plate 1-2, the both ends of upper oscillating screen plate 1-2 are equipped with baffle；Lower vibration One end of sieve plate 1-3 is equipped with baffle, inclined downward of the other end to the first elevator 1-4 directions so that lower oscillating screen plate The angle of 1-3 and horizontal plane is 4~5 ° (being 4 ° in specific the present embodiment)；In the present embodiment, since upper oscillating screen plate 1-2 is under Oscillating screen plate 1-3's is obliquely installed so that, can be under the action of vibration after pending molding sand drops down onto on oscillating screen plate 1-2 First elevator 1-4 directions slowly move, in molding sand moving process on one side filtered, on one side tiling come, avoid because The problem of molding sand gathers immediately below fence 1-1 and influences upper oscillating screen plate 1-2 filter efficiencies always, and pass through upper vibrating screen The large granular impurity and out-of-size molding sand left after plate 1-2 filtering is automatically sent to oscillating screen plate 1-2 on close the At an end-stopping plate of one elevator 1-4, convenient for centralized recovery processing large granular impurity and out-of-size molding sand；Size qualification Molding sand at the uniform velocity sent on lower oscillating screen plate 1-3 to the first elevator 1-4；Wherein, inventor passes through multiple field practice It summarizes and finds, the angle of lower oscillating screen plate 1-3 and horizontal plane are designed as 4~5 ° of (namely upper oscillating screen plate 1-2 and horizontal planes Angle is 4~5 °), it ensure that the molding sand on oscillating screen plate 1-2 can at the uniform velocity tile, ensure its filter effect, but also under The molding sand of size qualification at the uniform velocity can be gently moved on the first elevator 1-4 on oscillating screen plate 1-3, with sand in the present embodiment The unit interval sand treating capacity of processing system is adapted.First elevator 1-4 is located at the side of lower oscillating screen plate 1-3, and first carries The machine of liter 1-4 is used to the molding sand flowed down on lower oscillating screen plate 1-3 being promoted to the inlet cooling cylinder 1-7, and the inlet cooling cylinder 1-7 is set There is magnetic separator 1-5, magnetic separator 1-5 carries out magnetic separation processing for that will enter the molding sand in cooling cylinder 1-7, in the present embodiment, waits for Processing molding sand first passes through oscillating screen plate 1-2 and filters out large granular impurity (including bulky grain iron impurities) and out-of-size After molding sand, then by magnetic separator 1-5 progress magnetic separation processing, design in this way significantly reduces the workload of magnetic separator 1-5, is conducive to Improve the treatment effect and treatment effeciency of molding sand.The top in the exits cooling cylinder 1-7 is equipped with dust hood 1-9, and dust hood 1-9 is not Only play the role of absorbing the exits cooling cylinder 1-7 absorption dust laden air, it is negative also to form part in the exits cooling cylinder 1-7 Pressure so that the inlet cooling cylinder 1-7 and exit form pressure difference, and the molding sand of the inlet cooling cylinder 1-7 is under above-mentioned differential pressure action It is moved into cooling cylinder 1-7.

From the point of view of the casting technique of evaporative pattern and to the requirement of equipment, molding sand is difficult in moulding use and sand processing procedure Exempt from have broken and dusting, meanwhile, the coating dust decomposed in casting process can be also mixed into wherein, can deteriorate the performance of molding sand, drop Its low gas permeability, consumes more coating in coating step, it is therefore desirable to by molding sand is broken and dusting and coating decompose The dust of formation removes.

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 along cooling cylinder 1-7 length direction equidistantly distributeds And it is connected with the air outlet of high pressure positive blower 1-6；Cooling water coil, cooling cylinder are surrounded on the inner wall of cooling cylinder 1-7 It is provided with helical form cooling water pipe at axis line position inside 1-7.Molding sand is led in cooling cylinder 1-7 by three ajutage 1-8 The high pressure gas entered is blown afloat, and the molding sand blown afloat is mainly cooled down with the helical form set up at cooling cylinder 1-7 axis line insides position Water pipe exchanges heat, meanwhile, molding sand also carries out during blowing afloat with the cooling water coil around setting on cooling cylinder 1-7 inner walls Heat exchange, molding sand is rapidly cooled after helical form cooling water pipe and cooling water coil exchange heat jointly, in the exits cooling cylinder 1-7 To cooling cylinder 1-7 outlet movements under local decompression's effect of formation.In the present embodiment, cooling water coil and helical form cooling water pipe Molding sand is trapped among wherein jointly so that molding sand is blown to any direction in cooling cylinder 1-7 and can fully be exchanged heat, and carries significantly The cooling effect of cooling cylinder 1-7 is risen.In the present embodiment, high pressure that molding sand is passed through in cooling cylinder 1-7 by three ajutage 1-8 Gas is blown afloat, and molding sand can not only be made fully to spread and improve its heat transfer effect, while the dust in molding sand being made fully to be raised, had The dust in molding sand is all siphoned away conducive to the dust hood 1-9 being arranged above the exits cooling cylinder 1-7.

Second elevator 1-10 is located at the side in the exits cooling cylinder 1-7, and the second elevator 1-10 is used for cooling cylinder 1-7 The molding sand that exit flows down is promoted on conveyer belt 1-11；Conveyer belt 1-11 is located above at least three casting bed 1-12, conveyer belt 1-11 is at low cost using conveyer belt 1-11 conveying molding sand for molding sand to be delivered in each casting bed 1-12, and can be according to specific Molding sand is delivered to some specific casting bed 1-12 by demand, and sandbox 1-13 is provided with below casting bed 1-12；For the ease of sandbox The transport of 1-13, the bottoms sandbox 1-13 are equipped with pulley, a confession are equipped between the lower section and fence 1-1 of each casting bed 1-12 The track that sandbox 1-13 is slided.Be equipped with three-dimensional vibrating-compaction table below each casting bed 1-12, in modeling process, sandbox 1-13 with Three-dimensional vibrating-compaction table is fixed together, and three-dimensional vibrating-compaction table is for vibrating sandbox 1-13, since three-dimensional vibrating-compaction table can be at three mutually Vibration is generated on vertical direction, therefore the vibrating effect of three-dimensional vibrating-compaction table becomes apparent from, be conducive to improve casting final molding Quality.

Sand preparing system further includes vacuum distribution 1-14, and vacuum distribution 1-14 is equipped with multiple access ports, this connects Entrance is connected by pipeline with the vacuum orifice on sandbox 1-13；Vacuum distribution 1-14 is connected with vaccum-pumping equipment, and the pumping is true Null device includes vacuum pump, gas tank and water tank；In the present embodiment, the setting of vacuum distribution 1-14 makes a vaccum-pumping equipment Multiple sandbox 1-13 can be given to carry out vacuumize process simultaneously, improve the working efficiency of vaccum-pumping equipment, reduce and be produced into This.

In the present embodiment, in order to improve the working environment at scene, dust pollution is avoided, above fence 1-1, on vibrating screen (not shown) is both provided with dust hood 1-9 above side (not shown), each casting bed 1-12, to remove the dust in air.

In the present embodiment, dust hood 1-9 is connected with cleaner, which includes cyclone dust collectors, cloth bag Deduster and dedusting fan, dust hood 1-9 are connected with the entrance of cyclone dust collectors, and the outlet of cyclone dust collectors is removed by cloth bag Dirt device is connected with dedusting fan；Wherein, dedusting fan provides suction, and the systemic dust laden airs of dust hood 1-9 first pass through rotation Wind deduster removes the dust of bulky grain, while avoiding abrasion of the bulky grain dust to cloth bag on bag filter, to cloth bag It plays a protective role；Then pass through bag filter and remove short grained dust, the air after dedusting finally passes through dedusting fan Discharge；In the present embodiment, cleaner uses two-stage dedusting, dust removing effects more preferable.

In the present embodiment, on upper oscillating screen plate 1-2, closer to the position of the first elevator 1-4 directions, material exists The time vibrated above is more long, therefore on upper oscillating screen plate 1-2, at the position of the first elevator 1-4 directions, Large granular impurity and out-of-size molding sand it is easier be shattered into little particle and fall into lower section lower oscillating screen plate 1-3 on, And by the through-hole aperture on upper oscillating screen plate 1-2 from certain one end to the another of the first elevator 1-4 directions in the present embodiment End is designed as being gradually reduced, then can effectively avoid the appearance of the above problem.

In conclusion the sand preparing system in the present embodiment, smart structural design, manufacture and operating cost are relatively low.

Step ST9, casting cleaning；

Step ST10, it is heat-treated；

In step ST10, casting is put into heating furnace, by 4.5h constant-speed heatings to 945 DEG C, then keeps the temperature 2h, then pass through It crosses 1h and is cooled to 865 DEG C, come out of the stove air-cooled, wherein casting is put when air-cooled and is vibrated on a vibration table, and in the horizontal direction to vibration Platform air blast, shake table surface are evenly distributed with through-hole, and the height of casting vibration is 15~25mm.

In the present embodiment, casting is put vibrates air quenching on a vibration table, and casting can leave shake table when air quenching so that casting Entire outer surface obtain uniform hardening, existing quenching problem of non-uniform when current wear resistance castings air quenching can be solved；Its In, shake table surface is evenly distributed with through-hole, forms air flue up and down, ensure that effect of the casting multi-panel by air quenching.

Heat treatment process in the present embodiment, compared with the prior art in heat treatment process, casting can be obviously improved Hardness, for casting after the heat treatment process processing in the present embodiment, HRC hardness is promoted to 60~65, and cast(ing) surface hardness Uniformly, actual use demand can be better adapted to.

The technique of the lost foam casting scraper wearing piece of the present embodiment, can greatly promote the casting matter of scraper wearing piece Amount, and the disposable qualification rate of cast product reaches 98% or so.

Embodiment 2

The technique of the lost foam casting scraper wearing piece of the present embodiment, step is substantially the same manner as Example 1, difference Be in：

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

Wear-resistant protective layer 13031 is higher by the upper surface 6mm of scraper body 1302；First inclined surface 13011 with it is horizontal Angle is 35 °；Second inclined surface 13012 and the angle of vertical line are 55 °.

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

In step ST4, with writing brush by one layer of 3mm thickness of groove surfaces all on casting evaporative pattern 3 and through-hole surfaces brush Coating；In step ST8, the angle of lower oscillating screen plate 1-3 and horizontal plane is 5 °；In step ST10, casting is put into heating furnace It is interior, by 5h constant-speed heatings to 950 DEG C, 3h is then kept the temperature, 860 DEG C is cooled to using 2h, comes out of the stove air-cooled.

Embodiment 3

In conjunction with Fig. 7~9, the technique of the casting lateral lobe piece wearing piece of the present embodiment, step is substantially the same manner as Example 1, The difference is that：Bai Mozhong prepared by step ST1, casting evaporative pattern 3 are lateral lobe piece evaporative pattern 23, the lateral lobe piece evaporative pattern 23 include side blade body 2302, the first use portion 2301 and the second use portion 2305, and the first use portion 2301, second uses portion 2305 are located on two adjacent sides of side blade body 2302, in concrete whipping process, the first use portion 2301 It is contacted with side plate, second is contacted using portion 2305 with agitator inner wall；Second is higher by side blade body 2302 using portion 2305 Upper surface, the outer wall in the second use portion 2305 is arcwall face, and the design of arcwall face reduces second in concrete whipping process The resistance being subject to using 2305 outer wall of portion is reduced the abrasion in the second use portion 2305, improves the service life of lateral lobe piece；Side Front and back in blade body 2302 symmetrically to set there are two lateral lobe piece mounting hole 2303, which is waist-shaped hole, It is fixed for being installed side blade body 2302 by bolt；Lateral lobe piece mounting hole 2303 to be surrounded by one layer of lateral lobe piece wear-resisting Protective layer 23031, the lateral lobe piece wear-resistant protective layer 23031 are higher by 5~6mm of upper surface (this specific reality of side blade body 2302 Apply and take 5mm in example), and lateral lobe piece wear-resistant protective layer 23031 and the junction of side blade body 2302 use arc transition, circular arc The design of transition can reduce the abrasion of junction, enhance the using effect of wear-resistant protective layer 3031.

First using the outer surface in portion 2301 includes the first inclined surface of lateral lobe piece 23011, the second inclined surface of lateral lobe piece 23012, the 4th inclined surface 23014 of lateral lobe piece third inclined surface 23013 and lateral lobe piece, the first inclined surface of lateral lobe piece 23011 are the The upper surface in one use portion 2301, the first inclined surface of lateral lobe piece 23011 tilt down, and the 4th inclined surface 23014 of lateral lobe piece is the The lower surface in one use portion 2301, the 4th inclined surface 23014 of lateral lobe piece tilt down, lateral lobe piece third inclined surface 23013 and side The 4th inclined surface 23014 of blade connects, and lateral lobe piece third inclined surface 23013 tilts upwards, lateral lobe piece third inclined surface 23013 It is 50~55 ° (50 ° are taken in specific the present embodiment) with horizontal angle；The second inclined surface of lateral lobe piece 23012 is by lateral lobe piece Three inclined surface 23013 are connect with the first inclined surface of lateral lobe piece 23011, and the second inclined surface of lateral lobe piece 23012 is inclined with lateral lobe piece third The angle on inclined-plane 23013 is 90 °.First is made of using the outer surface in portion 2301 multiple inclined surface in the present embodiment, using this The first of unique texture can be obviously improved its performance and service life using portion 2301 in embodiment.Secondly, in order to subtract The weight of blade body 2302, reduces manufacturing cost on rear side of light casting and forming, and in side, blade body 2302 non-first uses portion 2301 and second use portion 2305 side be equipped with arc-shaped loss of weight notch 2304.In order to improve the stirring effect of lateral lobe piece Fruit shortens mixing cycle, and baffle 2306 is equipped in side blade body 2302, which is higher by side blade body 2302 Upper surface, and baffle 2306 is oppositely arranged with second using portion 2305, the setting increasing of baffle 2306 in concrete whipping process The amount of agitation of lateral lobe piece is added so that primary stirring can drive more concrete to move, and in identical mixing time, mix Solidifying soil is stirred more uniform, therefore shortens the mixing cycle of concrete, reduces production cost.

Embodiment 4

The technique of the casting lateral lobe piece wearing piece of the present embodiment, step is substantially the same manner as Example 3, and difference exists In：Lateral lobe piece wear-resistant protective layer 23031 is higher by the upper surface 6mm of side blade body 2302；Lateral lobe piece third inclined surface 23013 with Horizontal angle is 55 °.

Embodiment 5

In conjunction with Figure 10~12, the technique of blade wearing piece in the casting of the present embodiment, step and 1 basic phase of embodiment Together, the difference is that：Bai Mozhong prepared by step ST1, casting evaporative pattern 3 are middle blade evaporative pattern 33, and blade disappears in this It includes middle blade body 3302 and use portion 3301 to lose mould 33, and middle blade body 3302 is T-shaped structure, middle blade body 3302 Rear side be equipped with contacted with agitator inner wall using portion 3301 in concrete whipping process using portion 3301；This makes It is higher by the upper surface of middle blade body 3302 with portion 3301, the use of portion 3301 and the junction of middle blade body 3302 is circular arc mistake It crosses, the design of arc transition reduces the resistance being subject to using 3301 outer wall of portion in concrete whipping process, reduces using portion 3301 abrasion improves the service life of middle blade；Middle blade is pacified there are two symmetrically being set before and after in middle blade body 3302 Hole 3303 is filled, blade mounting hole 3303 is round hole in this, is fixed for installing middle blade body 3302 by bolt；Middle period Piece mounting hole 3303 is surrounded by blade wear-resistant protective layer 33031 in one layer, during blade wear-resistant protective layer 33031 is higher by this 5~6mm of upper surface (taking 5mm in specific the present embodiment) of blade body 3302；And middle blade wear-resistant protective layer 33031 and middle period The junction of piece ontology 3302 uses arc transition, the design of arc transition that can reduce the abrasion of junction, blade in enhancing The using effect of wear-resistant protective layer 33031.

Upper surface, the lower surface of 3302 front of middle blade body are tilted between the two, 3302 front of middle blade body The angle of upper surface and lower surface is α=10~11 ° (10 ° are taken in specific the present embodiment)；Using unique texture in the present embodiment Middle blade body 3302 can be obviously improved its performance and service life.Secondly, in order to mitigate the middle period after casting and forming The weight of piece ontology 3302 reduces manufacturing cost, and middle blade body 3302 is designed as T-shaped structure, middle period in the present embodiment It is symmetrically set on piece ontology 3302 there are two middle blade weight loss groove 3304,3302 structural strength of blade body in guarantee Under the premise of, alleviate the weight of middle blade body 3302.

For existing middle blade in concrete whipping process, the stirring between concrete has prodigious resistance, is working In have at prodigious deterioration, the especially mounting hole of middle period on piece, can so that bolt in mounting hole is damaged, it is actual In engineer application, tends to cause middle blade that insecure or the accidents such as directly fall off generations are installed, reduce middle blade Service life, to increase the loss of wearing piece.To overcome the above disadvantages, in the present embodiment：Middle blade mounting hole 3303 Be surrounded by blade wear-resistant protective layer 33031 in one layer, blade wear-resistant protective layer 33031 is higher by middle blade body 3302 in this Upper surface and have certain thickness, centering blade mounting hole 3303 plays significant protective effect, in middle blade working, Blade wear-resistant protective layer 33031 is worn after loss completely in the middle, and just meeting centering blade mounting hole 3303 forms abrasion, sets in this way Meter protects middle blade mounting hole 3303 and its interior bolt significantly, improves the service life of middle blade, resistance to reduce Grind the loss of part.

Embodiment 6

The technique of blade wearing piece in the casting of the present embodiment, step is substantially the same manner as Example 5, and difference exists In：Middle blade wear-resistant protective layer 33031 is higher by the upper surface 6mm of middle blade body 3302；3302 front upper table of middle blade body The angle of face and lower surface is 11 °.

Schematically the present invention and embodiments thereof are described above, description is not limiting, institute in attached drawing What is shown is also one of embodiments of the present invention, and actual structure is not limited to this.So if the common skill of this field Art personnel are enlightened by it, without departing from the spirit of the invention, are not inventively designed and the technical solution Similar frame mode and embodiment, are within the scope of protection of the invention.

Claims

1. a kind of method of lost foam process casting scraper wearing piece, which is characterized in that the lost foam process includes following step Suddenly：

Step ST1, white mould is prepared；

Using expandable polystyrene as raw material, raw material is put into pre-foaming machine, be passed through 70~100 DEG C of steam 2~5 minutes into Row prefoam so that the foam volume obtained after prefoam increases to 5~10 times before prefoam；

The foam obtained after prefoam is rushed in mold using compressed air, 50~100 DEG C of steam is passed through into mold, is sent out Bubble obtains Bai Mo；

Be passed through cooling water from top to bottom into mold, wait for that upper mold by mold is opened after the mold is cooled, then into mold from lower and On be passed through compressed air, white mould is ejected out of mold；

Wherein, the white mould includes cross gate (1), ingate (2) and casting evaporative pattern (3)；

Step ST2, white mould is assembled；

Step ST3, coating is prepared；

Step ST4, swabbing；

Step ST5, dip-coating material；

Step ST6, moulding；

Step ST7, it pours into a mould；

Step ST8, molding sand recycles；

Step ST9, casting cleaning；

Step ST10, it is heat-treated；

Wherein, the Bai Mozhong that prepared by step ST1, the casting evaporative pattern (3) are scraper evaporative pattern (13), the scraper evaporative pattern (13) include scraper body (1302) and scrape the edge of a knife (1301), scrape the side that the edge of a knife (1301) is located at scraper body (1302), scrape Front and back on knife cutter hub (1302) symmetrically to set there are two scraper mounting hole (1303), which is waist-shaped hole； Scraper mounting hole (1303) is surrounded by one layer of wear-resistant protective layer (13031), which is higher by scraper knife The upper surface of body (1302), and wear-resistant protective layer (13031) and the junction of scraper body (1302) use arc transition；

The outer surface for scraping the edge of a knife (1301) includes the first inclined surface (13011), the second inclined surface (13012), third inclination Face (13013) and the 4th inclined surface (13014), first inclined surface (13011) are the upper surface for scraping the edge of a knife (1301), first Inclined surface (13011) tilts upwards, and the second inclined surface (13012) are connect with the first inclined surface (13011), and the second inclined surface (13012) it tilts down, the 4th inclined surface (13014) is the lower surface for scraping the edge of a knife (1301), and third inclined surface (13013) are by Two inclined surface (13012) are connect with the 4th inclined surface (13014)；

The rear and front end of the scraper body (1302) is symmetrically equipped with scraper weight loss groove (1304)；

First inclined surface (13011) and horizontal angle are 30~35 °, the second inclined surface (13012) and vertical line Angle is 50~55 °；The wear-resistant protective layer (13031) is higher by 5~6mm of upper surface of scraper body (1302).

2. the method for lost foam process casting scraper wearing piece according to claim 1, it is characterised in that：Step ST1 systems Standby Bai Mozhong, the cross gate (1) are strip, and cross gate (1) includes cross gate main body (104), the cross gate main body (104) upper middle position is equipped with drainage muscle (101) along its length, and cross gate main body (104) top is along its length also etc. 3~8 inserting grooves (102) are equipped with to spacing, the both sides of the drainage muscle (101) symmetrically offer weight loss groove (103)；

The casting evaporative pattern (3) and ingate (2) are integrally formed, and the both sides of casting evaporative pattern (3) are symmetrically equipped with interior Running channel (2), the ingate (2) include drainage block (201) and grafting block (202), the drainage block (201) and grafting block (202) Be mutually perpendicular to collectively form L-shaped structure, the thickness of drainage block (201) is less than the thickness of grafting block (202), drainage block (201) with Casting evaporative pattern (3) is connected, and grafting block (202) with above-mentioned inserting groove (102) for matching；

The weight loss groove (103) and the intersection of inserting groove (102) use arc transition；It is described drainage block (201) thickness be The 1/4~1/2 of grafting block (202) thickness；

The length direction of the inserting groove (102) is parallel to cross gate main body (104) width direction, and the inserting groove (102) is by two Side wall and rear wall composition；It is rectangular block to drain block (201) and grafting block (202), and the inserting groove (102) is one end open Rectangular channel；

The width of the grafting block (202) is equal with the width of drainage block (201), and the width of grafting block (202) is more than inserting groove (102) 2~3mm of width, the thickness of grafting block (202) are equal to the depth of inserting groove (102)；

The both sides for draining muscle (101) one end are equipped with link block, which will drain the side and cross of muscle (101) end Runner body (104) is connected.

3. the method for lost foam process casting scraper wearing piece according to claim 2, it is characterised in that：In step ST2, Two cross gates (1) are vertically arranged so that the inserting groove (102) on two cross gates (1) is facing each other, and 3~8 casting disappear It loses mould (3) to be located between two cross gates (1), and at least at a distance of 5mm, casting evaporative pattern (3) between adjacent casting evaporative pattern (3) The ingate (2) of both sides is matched with the cross gate of respective side (1) respectively, obtains white mould assembly.

4. the method for lost foam process casting scraper wearing piece according to claim 2, it is characterised in that：In step ST3, Refractory aggregate, organic binder, anhydrous adhesive, suspending agent, thickening stabilizing agent, antifoaming agent and preservative are uniformly mixed Coating is obtained, wherein：Refractory aggregate accounts for the 17~18% of coating gross mass, and refractory aggregate is the mixing of brown alundum powder and silica flour The grain size of object, the brown alundum powder and silica flour is 300 mesh or more；Organic binder is sodium carboxymethylcellulose and white glue with vinyl Mixture, the sodium carboxymethylcellulose accounts for the 0.2~0.6% of coating gross mass, white glue with vinyl account for coating gross mass 3~ 6%, the polyvinyl alcohol containing mass percent 20% in the white glue with vinyl；Anhydrous adhesive is Ludox, and the Ludox accounts for The 3~8% of coating gross mass；Suspending agent is sodium bentonite, and the sodium bentonite accounts for the 1~4% of coating gross mass；Thickening Stabilizer is polyacrylamide, and the polyacrylamide accounts for the 0.1~0.2% of coating gross mass.

5. the method for lost foam process casting scraper wearing piece according to claim 3, it is characterised in that：

It is with writing brush that one layer of 2~3mm of groove surfaces and through-hole surfaces brush all on casting evaporative pattern (3) is thick in step ST4 Coating, drying；

In step ST5, prepare white mould assembly, the cross gate (1) that casting evaporative pattern (3) both sides are vertically arranged is passed through into rope respectively Son is bundled in the two side arms of fixed frame (4), and the fixed frame (4) is rectangular frame；Then fixed frame (4) is integrally immersed and is applied In material pond, takes out fixed frame (4) and dry；Fixed frame (4) is integrally immersed in coating pond again, fixed frame (4) is taken out and dries again；

In step ST6, first the bottom sandbox (1-13) spread a stratotype sand, using three-dimensional vibrating-compaction table jolt ramming, shake it is smooth, by white module Dress body is removed from fixed frame (4), then white mould assembly is hung into middle part in sandbox (1-13), downward by casting bed (1-12) At the uniform velocity add sand in the sandbox (1-13) of side and vibrate sandbox (1-13), the amplitude of sandbox (1-13) is 0.2~0.4mm, until type Stop adding sand when sand is from sandbox (1-13) 10~20mm suitable for reading, stops stopping vibration after adding 30~45s of sand, then in sandbox (1- 13) top is laid with plastic film, and dry sand gland plastic film is used in combination, places sprue cup, to be cast；

In step ST7, pouring temperature control is 1350~1400 DEG C, control negative pressure value 0.015 in sandbox (1-13) when cast~ 0.025MPa after being poured, crosses 6~7min and removes vacuum；

In step ST9, the ingate coagulum that the molding sand of cast(ing) surface is removed, and casting both sides are connected knocks out, polishes and do Only.

6. the method for lost foam process casting scraper wearing piece according to claim 3, it is characterised in that：

In step ST8, molding sand recycling is carried out using sand preparing system, sandbox (1-13) is moved on fence (1-1) and mould turnover, casting Part is intercepted by fence (1-1), and molding sand is dropped down onto by the through-hole on fence (1-1) on upper oscillating screen plate (1-2), with upper vibrating screen The molding sand of the vibration of plate (1-2), size qualification is fallen by the through-hole on upper oscillating screen plate (1-2) on lower oscillating screen plate (1-3), Impurity and out-of-size molding sand are left on oscillating screen plate (1-2)；Molding sand on lower oscillating screen plate (1-3) passes through first Elevator (1-4) is promoted to the inlet cooling cylinder (1-7), and carries out magnetic separation processing, magnetic separation processing in the inlet cooling cylinder (1-7) Molding sand afterwards enters in cooling cylinder (1-7) cooling, dedusting, molding sand cooling, after dedusting pass 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, the sand preparing system includes fence (1-1), vibrating screen, the first elevator (1-4), cooling cylinder (1-7), dust suction (1-9), the second elevator (1-10), conveyer belt (1-11), casting bed (1-12) and sandbox (1-13) are covered, the fence (1-1) Vibrating screen is arranged in lower section, which includes the upper oscillating screen plate (1-2) being connected with vibrating motor, lower oscillating screen plate (1-3), Upper oscillating screen plate (1-2) and lower oscillating screen plate (1-3) are arranged in parallel above and below；It is evenly equipped on the upper oscillating screen plate (1-2) logical The both ends in hole, upper oscillating screen plate (1-2) are equipped with baffle；One end of the lower oscillating screen plate (1-3) be equipped with baffle, the other end to The inclined downward of the first elevator (1-4) direction；First elevator (1-4) is located at the one of lower oscillating screen plate (1-3) Side, the first elevator (1-4) is used to the molding sand flowed down on lower oscillating screen plate (1-3) being promoted to the inlet cooling cylinder (1-7), cold But the top in the exit cylinder (1-7) is equipped with dust hood (1-9)；Second elevator (1-10) is located at cooling cylinder (1-7) outlet The side at place, the second elevator (1-10) are used to the molding sand that the exit cooling cylinder (1-7) flows down being promoted to conveyer belt (1-11) On；The conveyer belt (1-11) is located above at least three casting beds (1-12), and conveyer belt (1-11) is used to molding sand being delivered to sand In bed (1-12), sandbox (1-13) is provided with below casting bed (1-12)；

The sand preparing system further includes vacuum distribution (1-14), which is equipped with multiple access ports, The access port is connected by pipeline with the vacuum orifice on sandbox (1-13)；The vacuum distribution (1-14) and vaccum-pumping equipment It is connected；

Cooling cylinder (1-7) inlet is equipped with magnetic separator (1-5), and the magnetic separator (1-5) will be for that will enter in cooling cylinder (1-7) Molding sand carry out magnetic separation processing；

Cooling cylinder (1-7) bottom surface is connected with three ajutages (1-8) respectively, and above three ajutage (1-8) is along cooling Cylinder and is connected with the air outlet of high pressure positive blower (1-6) at (1-7) length direction equidistantly distributed；The cooling cylinder (1-7) It is surrounded with cooling water coil on inner wall, helical form cooling water pipe is provided at the internal axis line position of cooling cylinder (1-7)；

It is both provided with dust hood (1-9) above the fence (1-1), above vibrating screen, above each casting bed (1-12)；

The dust hood (1-9) is connected with cleaner, which includes cyclone dust collectors, bag filter and remove Dirt wind turbine, the dust hood (1-9) are connected with the entrance of cyclone dust collectors, and the outlet of cyclone dust collectors passes through bag filter It is connected with dedusting fan；

The lower oscillating screen plate (1-3) and the angle of horizontal plane are 4~5 °；

Through-hole aperture on the upper oscillating screen plate (1-2) is from certain one end to the other end of the first elevator (1-4) direction It is gradually reduced；

It is equipped with a track slided for sandbox (1-13) between the lower section and fence (1-1) of each casting bed (1-12)；

It is equipped with three-dimensional vibrating-compaction table below each casting bed (1-12).

7. the method for lost foam process casting scraper wearing piece according to claim 3, it is characterised in that：Step ST10 In, casting is put into heating furnace, by 4.5~5h constant-speed heatings to 945~950 DEG C, then keeps the temperature 2~3h, using 1~ 2h is cooled to 860~865 DEG C, comes out of the stove air-cooled, wherein casting is put when air-cooled and is vibrated on a vibration table, and in the horizontal direction to Shake table air blast, shake table surface are evenly distributed with through-hole, and the height of casting vibration is 15~25mm.