CN105499504A

CN105499504A - Lost foam casting technology for scraping knife or side blade or middle blade wear-resistant parts

Info

Publication number: CN105499504A
Application number: CN201511017168.4A
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: 2016-04-20
Anticipated expiration: 2035-12-29
Also published as: CN107096887A; CN106583650A; CN107096887B; CN105499504B; CN106734912A; CN106734912B; CN106583650B

Abstract

The invention discloses a lost foam casting technology for scraping knife or side blade or middle blade wear-resistant parts, and belongs to the field of the lost foam casting technology. The lost foam casting technology for wear-resistant parts disclosed by the invention comprises the following steps: step ST1, preparing lost foam patterns, wherein the lost foam patterns comprise cross gates, ingates and a casting lost foam; step ST2, assembling the lost foam patterns, wherein the two cross gates are vertically arranged so that inserting grooves in the two cross gates directly face to each other, the casting lost foam is positioned between the two cross gates, and the ingates on the two sides of the casting lost foam are respectively matched with the cross gates on the corresponding sides so as to obtain a lost foam pattern assembly; step ST3, preparing a coating; step ST4, brushing the coating; step ST5, soaking the coating; step ST6, molding; step ST7, casting; step ST8, recycling casting sand; step ST9, carrying out casting cleaning; and step ST10, carrying out heat treatment. The lost foam casting technology mainly achieves the function of promoting the casting quality of the wear-resistant parts.

Description

The technique of a kind of lost foam casting scraper or lateral lobe sheet or Leaf wearing piece

Technical field

The present invention relates to a kind of lost foam casting process, more particularly, relate to the technique of a kind of lost foam casting scraper or lateral lobe sheet or Leaf wearing piece.

Background technology

Technology of EPC is bondd by the foamed plastic model identical with casting dimension shape to be combined into model cluster, after brushing refractory coating is also dried, be embedded in vibration molding in drystone sand, pour into a mould liquid metals under certain condition, model gasified and occupies modal position, after solidifying cooling, forming the method for required foundry goods.Compared with traditional foundry engieering, owing to adopting the foamed plastics analogue formation very easily gasified, without the need to delivery with making core rod, without die joint, thus non-trimming burr, this technical process has abandoned traditional handicraft complex procedures, course of work pollutant discharge amount is large, labor strength is high unfavorable factor completely, what realize is that a kind of operation is simple, and efficiency is high, nearly non-harmful cleaner production.

Lost foam casting field, need to use cross gate and ingate in casting operation, ingate is connected with foundry goods evaporative pattern, makes cast casting shaping for being drained in foundry goods evaporative pattern by liquid metals; Cross gate, for connecting multiple foundry goods evaporative pattern, makes once-cast can the multiple foundry goods of casting.But, in prior art, the manufacturer of lost foam casting process is in order to follow the line of least resistance, often buy separately foam board cutting and form cross gate, cross gate and ingate is made to be split type, before casting, need cross gate and ingate to be glued together by glue, this way had not only been taken a lot of work effort but also virtually add production cost, and cross gate and ingate often bond insecure, easily obscission is there is in handling process or in sandbox note sand jolt ramming process, reduce casting quality, simultaneously, cross gate is generally long plates of rectangular shape, be unfavorable for the flowing of liquid metals.Secondly, be often that a little rectangular block is connected on foundry goods evaporative pattern by Design of Gate in prior art, when shaping foundry goods being cleared up after casting complete, the ingate coagulum be connected on foundry goods is needed to knock out, polishing, but be jointly shaping with foundry goods body when pouring into a mould because ingate solidifies, often cause and knock out in ingate process of setting, be not ingate coagulum stay one section be difficult on foundry goods body remove, partly also struck near foundry goods body and ingate coagulum junction, not only work consuming consuming time, and have a strong impact on the quality of foundry goods, add foundry goods defect rate.

About lost foam casting process, in prior art, existing related art scheme is open, as patent publication No.: CN104690225A, publication date: on June 10th, 2015, invention and created name is: a kind of lost foam casting process of foundry goods good mechanical property, this application case discloses a kind of lost foam casting process of foundry goods good mechanical property, comprises the following steps: adopt expanded material piecemeal to make each critical piece, and foundry goods evaporative pattern is made in each critical piece bonding of making; For foundry goods evaporative pattern bonding running channel, and make final mask at foundry goods evaporative pattern and running channel outer application refractory material; Final mask is put into sandbox, inserts dry sand, adopt three-dimensional vibrating-compaction table jolt ramming, plastic covering film on sandbox; From top to down passes into negative-pressure air-flow uniformly and reaches-0.04 ~-0.08MPa to negative pressure in sandbox, and this negative-pressure air-flow adopts the mist of oxygen, nitrogen, carbon dioxide; Molten metal is poured into the region at corresponding final mask place in sandbox, final mask gasification disappears, and metal replacement final mask, obtains foundry goods after cooling.But by glue bonded same with between cross gate of this application case medium casting evaporative pattern is linked together, still there will be the problem such as the group mould time that affects, casting quality.

The technique of lost foam casting process comprises white area, black area and yellow district technique, in existing Technology of EPC, black area is the operation of carrying out sand process, the regeneration by the molding sand well sand preparing system after using being carried out screening, after the process such as dedusting, its Main Function is: screen out impurity in molding sand foreign material such as () sand lump, scum, coating dust, cooling, conveying and store molding sand.Casting technique from evaporative pattern and the requirement to equipment, dry sand has fragmentation and efflorescence unavoidably in moulding use and cyclic process, simultaneously, the coating dust decomposed in casting process also can be mixed into wherein, the performance of molding sand can be worsened, reduce gas permeability, consume more binding agent, the dust therefore needing molding sand is broken and efflorescence and coating to decompose and formed removes.In addition, initial temperature after the molding sand demoulding is very high, usually 200 ~ 500 DEG C are had, in evaporative pattern is produced, when sand temperature is too high, film can be scorched in modeling process or cause film warpage, therefore before moulding, sand temperature should control just can reuse below 55 DEG C as far as possible, therefore needs efficient cooling device to realize.Therefore, do not configure the lost foam casting process of sand preparing system, be difficult to the stability showing the excellent feature of lost foam casting production environment He guarantee product quality.A general configuration sand preparing system in existing lost foam casting process, but existing sand preparing system often complex structure, manufacture and operating cost higher.

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

Mixer application widely, can be applicable to building field, field of Environment Protection etc., in mixer, requisite element comprises scraper and paddle (paddle generally comprises the lateral lobe sheet and Leaf that combinationally use), they play an important role in mixer, scraper and paddle generally adopt lost foam casting process manufacture, use as wearing piece.In engineer applied, because existing scraper and paddle are in concrete-agitating process, and the stirring between concrete has very large resistance, have very large deterioration at work, the installing hole place especially on scraper and paddle, the bolt in installing hole can be made damaged, in actual engineer applied, often easily cause scraper and paddle to be installed insecurely even directly to come off, reduce the service life of scraper and paddle, thus add the loss of wearing piece.

Through retrieval, Chinese Patent Application No.: 2010201484235, publication date: on December 1st, 2010, invention and created name is: a kind of scraper, this application case discloses a kind of scraper, comprise and scrape cutter hub, the one end of scraping cutter hub is provided with scrapes the edge of a knife, the other end is provided with handle of a knife, the outer surface scraping the edge of a knife is welded with one deck compound carbonizing chromium and niobium carbide alloy, scrapes the edge of a knife and is all wrapped in alloy-layer, and the two sides of scraping cutter hub and handle of a knife are welded with latticed alloy, latticed alloy connects with the alloy phase scraping the edge of a knife, and the material scraping cutter hub is manganese steel or ordinary carbon steel; Relative to prior art, this application case adopts manganese steel or ordinary carbon steel to make the matrix of scraper, and make wearing layer at matrix surface welding compound carbonizing chromium and niobium carbide alloy, 2 ~ 3 times are improved than the anti-wear performance of conventional cast scraper, extend the service life of scraper, the loss but the through hole that in this application case, handle of a knife surface has still easily is worn, scraper can be caused to install insecure or from the generation of the accidents such as mixing arm comes off, reduce the service life of scraper, thus add the loss of wearing piece.

Chinese Patent Application No.: 2010206563252, publication date: on August 24th, 2011, invention and created name is: the paddle of concrete mixer, this application case discloses a kind of paddle of concrete mixer, include T-shaped blade, blade is provided with twice bar shaped slideway, is respectively equipped with installing hole between twice bar shaped slideway, is respectively equipped with groove outside twice bar shaped slideway.The paddle reasonable in design of this application case, weight saving, coordinates with miscellaneous part easy for installation, improves stirring efficiency.But the installing hole be provided with between twice bar shaped slideway in this application case is still easily worn loss, can causes paddle that generation that the is insecure or accident such as directly to come off is installed, reduce the service life of paddle, thus add the loss of wearing piece.

Summary of the invention

1. invent the technical problem that will solve

The object of the invention is to overcome above-mentioned deficiency of the prior art, provide the technique of a kind of lost foam casting scraper or lateral lobe sheet or Leaf wearing piece, mainly achieve the function promoting wearing piece castability.

2. technical scheme

For achieving the above object, technical scheme provided by the invention is:

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

Step ST1, prepare white mould;

Be raw material with expandable polystyrene, raw material is put into pre-foaming machine, and the steam passing into 70 ~ 100 DEG C carries out prefoam in 2 ~ 5 minutes, and the foam volume obtained after making prefoam increases to 5 ~ 10 times before prefoam;

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

In mould, pass into cooling water from top to bottom, after mold cools down, the patrix of mould is opened, then pass into compressed air from bottom to top in mould, white mould is ejected in mould;

Wherein, described white mould comprises cross gate, ingate and foundry goods evaporative pattern.

Step ST2, assemble white mould;

Step ST3, prepare coating;

Step ST4, swabbing;

Step ST5, dip-coating material;

Step ST6, moulding;

Step ST7, cast;

Step ST8, molding sand reclaim;

Step ST9, casting cleaning;

Step ST10, heat treatment.

As further improvement of the present invention, Bai Mozhong prepared by step ST1, described cross gate is strip, cross gate comprises cross gate main body, this cross gate body top centre position is provided with drainage muscle along its length, cross gate body top is also provided with some inserting grooves along its length equally spacedly, offers lightening grooves to the bilateral symmetry of described drainage muscle;

Described foundry goods evaporative pattern and ingate are integrated, be provided with ingate to the bilateral symmetry of foundry goods evaporative pattern, this ingate comprises drainage block and grafting block, described drainage block and grafting block be vertical common formation L shape structure mutually, the thickness of drainage block is less than the thickness of grafting block, drainage block and foundry goods evaporative pattern are connected, and grafting block is used for matching with above-mentioned inserting groove;

The intersection of described lightening grooves and inserting groove adopts arc transition; Described cross gate body top is provided with 3 ~ 8 inserting grooves along its length equally spacedly; The thickness of described drainage block is 1/4 ~ 1/2 of grafting block thickness;

The length direction of described inserting groove is parallel to cross gate body width direction, and this inserting groove is made up of two side and rear wall; Drainage block and grafting block are rectangular block, and described inserting groove is the rectangular channel of one end open;

The width of described grafting block is equal with the width of drainage block, and the width of grafting block is greater than the width 2 ~ 3mm of inserting groove, and the thickness of grafting block equals the degree of depth of inserting groove;

The both sides of described drainage muscle one end are provided with contiguous block, and the side of drainage muscle end is connected with cross gate main body by this contiguous block.

As further improvement of the present invention, in step ST2, two cross gates are vertically arranged, make the inserting groove on two cross gates facing each other, 3 ~ 8 foundry goods evaporative patterns are between two cross gates, and at least at a distance of 5mm between adjacent foundry goods evaporative pattern, the ingate of foundry goods evaporative pattern both sides matches with the cross gate of respective side respectively, obtains white mould assembly.

As further improvement of the present invention, in step ST3, refractory aggregate, organic binder, anhydrous adhesive, suspending agent, thickening stabilizing agent, defoamer and anticorrisive agent are mixed and obtains coating, wherein: refractory aggregate accounts for 17 ~ 18% of coating gross mass, refractory aggregate is the mixture of brown alundum powder and silica flour, and the particle diameter of described brown alundum powder and silica flour is more than 300 orders; Organic binder is the mixture of sodium carboxymethylcellulose and white glue with vinyl, and described sodium carboxymethylcellulose accounts for 0.2 ~ 0.6% of coating gross mass, and white glue with vinyl accounts for 3 ~ 6% of coating gross mass, the polyvinyl alcohol containing mass percent 20% in described white glue with vinyl; Anhydrous adhesive is Ludox, and described Ludox accounts for 3 ~ 8% of coating gross mass; Suspending agent is sodium bentonite, and described sodium bentonite accounts for 1 ~ 4% of coating gross mass; Thickening stabilizing agent is polyacrylamide, and described polyacrylamide accounts for 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 foundry goods evaporative pattern and the thick coating of through-hole surfaces brush one deck 2 ~ 3mm, dry;

In step ST5, prepare white mould assembly, be bundled in the two side arms of fixed mount by the cross gate that foundry goods evaporative pattern both sides are vertically arranged respectively by rope, described fixed mount is rectangular frame; Then fixed mount entirety is immersed in coating pond, take out fixed mount and dry; Again fixed mount entirety is immersed in coating pond, take out fixed mount and again dry;

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

In step ST7, it is 1350 ~ 1400 DEG C that pouring temperature controls, and controls negative pressure value 0.015 ~ 0.025MPa when building in sandbox, after being poured, crossing 6 ~ 7min and removes vacuum;

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

As further improvement of the present invention, in step ST8, sand preparing system is utilized to carry out molding sand recovery, sandbox to be moved on fence and mould turnover, foundry goods is tackled by fence, and molding sand drops down onto on upper oscillating screen plate, along with the vibration of upper oscillating screen plate by the through hole on fence, the molding sand of size qualification falls on lower oscillating screen plate by the through hole on upper oscillating screen plate, and impurity and out-of-size molding sand are left on oscillating screen plate; Molding sand on lower oscillating screen plate is promoted to cooling cylinder porch by the first elevator, and carry out magnetic separation process in cooling cylinder porch, molding sand after magnetic separation process enters cooling, dedusting in cooling cylinder, molding sand after cooling, dedusting passes through the second elevator, tape transport successively in each casting bed, completes molding sand removal process;

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

Described sand preparing system also comprises vacuum distribution, and this vacuum distribution is provided with multiple access port, and this access port is connected with the vacuum orifice on sandbox by pipeline; Described vacuum distribution is connected with vaccum-pumping equipment;

Described cooling cylinder porch is provided with magnetic separator, and this magnetic separator is used for the molding sand entered in cooling cylinder to carry out magnetic separation process;

Described cooling cylinder bottom surface is connected with three ajutages respectively, and above-mentioned three ajutages equidistantly distribute along cooling cylinder length direction and are all connected with the air outlet of high pressure positive blower; The inwall of described cooling cylinder is surrounded with cooling water coil, and position, the axis erection of cooling cylinder inside has helical form cooling water pipe;

Dust shield is provided with above described fence, above vibratory sieve, above each casting bed;

Described dust shield is all connected with cleaner, and this cleaner comprises cyclone dust collectors, sack cleaner and dedusting fan, and described dust shield is connected with the entrance of cyclone dust collectors, and the outlet of cyclone dust collectors is connected with dedusting fan by sack cleaner;

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

Through-hole aperture on described upper oscillating screen plate reduces to the other end in the first direction, elevator place gradually from certain one end;

A track slided for sandbox is equipped with between the below of each casting bed and fence;

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

As further improvement of the present invention, in step ST10, foundry goods is put into heating furnace, through 4.5 ~ 5h constant-speed heating to 945 ~ 950 DEG C, then 2 ~ 3h is incubated, 860 ~ 865 DEG C are cooled to again, air cooling of coming out of the stove, wherein through 1 ~ 2h, during air cooling, foundry goods is put and vibrate on a vibration table, and in the horizontal direction to shake table air blast, the uniform through hole in shake table surface, the height of foundry goods vibration is 15 ~ 25mm.

The technique of above-mentioned lost foam casting wearing piece that utilizes of the present invention is to cast the technique of scraper wearing piece, Bai Mozhong prepared by step ST1, described foundry goods evaporative pattern is scraper evaporative pattern, this scraper evaporative pattern comprises scraper body and scrapes the edge of a knife, scrape the side that the edge of a knife is positioned at scraper body, be provided with two scraper installing holes symmetrically before and after on scraper body, this scraper installing hole is waist-shaped hole; The surrounding of scraper installing hole is provided with one deck wear-resistant protective layer, and this wear-resistant protective layer exceeds the upper surface of scraper body, and the junction of wear-resistant protective layer and scraper body adopts arc transition;

The described outer surface scraping the edge of a knife comprises the first inclined plane, the second inclined plane, the 3rd inclined plane and the 4th inclined plane, described first inclined plane is scrape the upper surface of the edge of a knife, first inclined plane is inclined upwardly, second inclined plane is connected with the first inclined plane, and the second inclined plane is downward-sloping, 4th inclined plane is scrape the lower surface of the edge of a knife, and the second inclined plane is connected with the 4th inclined plane by the 3rd inclined plane;

The rear and front end of described scraper body is provided with scraper lightening grooves symmetrically;

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

The technique of above-mentioned lost foam casting wearing piece that utilizes of the present invention is to cast the technique of lateral lobe sheet wearing piece, Bai Mozhong prepared by step ST1, described foundry goods evaporative pattern is lateral lobe sheet evaporative pattern, this lateral lobe sheet evaporative pattern comprises side blade body, the first use portion and the second use portion, described first use portion, the second use portion lay respectively on two adjacent sides of side blade body, described second use portion exceeds the upper surface of side blade body, and the outer wall in the second use portion is arcwall face; Be provided with two lateral lobe sheet installing holes symmetrically before and after in the blade body of side, this lateral lobe sheet installing hole is waist-shaped hole; The surrounding of lateral lobe sheet installing hole is provided with one deck lateral lobe sheet wear-resistant protective layer, and this lateral lobe sheet wear-resistant protective layer exceeds the upper surface of side blade body, and the junction of lateral lobe sheet wear-resistant protective layer and side blade body adopts arc transition;

The outer surface in described first use portion comprises lateral lobe sheet first inclined plane, lateral lobe sheet second inclined plane, lateral lobe sheet the 3rd inclined plane and lateral lobe sheet the 4th inclined plane, described lateral lobe sheet first inclined plane is the upper surface in the first use portion, lateral lobe sheet first inclined plane is downward-sloping, lateral lobe sheet the 4th inclined plane is the lower surface in the first use portion, lateral lobe sheet the 4th inclined plane is downward-sloping, lateral lobe sheet the 3rd inclined plane is connected with lateral lobe sheet the 4th inclined plane, and lateral lobe sheet the 3rd inclined plane is inclined upwardly, lateral lobe sheet the 3rd inclined plane is connected with lateral lobe sheet first inclined plane by lateral lobe sheet second inclined plane,

The side in the non-first use portion of described side blade body and the second use portion is provided with loss of weight breach; Described side blade body is provided with baffle plate, and this baffle plate exceeds the upper surface of side blade body, and baffle plate and the second use portion are oppositely arranged;

Described lateral lobe sheet the 3rd inclined plane and horizontal angle are 50 ~ 55 °, and the angle of described lateral lobe sheet second inclined plane and lateral lobe sheet the 3rd inclined plane is 90 °; Described lateral lobe sheet wear-resistant protective layer exceeds the upper surface 5 ~ 6mm of side blade body.

The technique of above-mentioned lost foam casting wearing piece that utilizes of the present invention is to cast the technique of Leaf wearing piece, Bai Mozhong prepared by step ST1, described foundry goods evaporative pattern is Leaf evaporative pattern, this Leaf evaporative pattern comprises Leaf body and use portion, described Leaf body is T-shaped structure, the rear side of Leaf body is provided with use portion, and this use portion exceeds the upper surface of Leaf body, and the junction of use portion and Leaf body is arc transition; Be provided with two Leaf installing holes symmetrically before and after on Leaf body, this Leaf installing hole is circular port; The surrounding of Leaf installing hole is provided with one deck Leaf wear-resistant protective layer, and this Leaf wear-resistant protective layer exceeds the upper surface of Leaf body, and the junction of Leaf wear-resistant protective layer and Leaf body adopts arc transition;

The upper surface of described Leaf body portion, lower surface are all to tilting therebetween, and the angle of Leaf body portion upper surface and lower surface is α;

Described α is 10 ~ 11 °; Described Leaf wear-resistant protective layer exceeds the upper surface 5 ~ 6mm of side blade body;

Described Leaf body is symmetrically provided with two Leaf lightening grooves.

3. beneficial effect

Adopt technical scheme 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 lower, mainly comprise following beneficial effect:

1) upper oscillating screen plate and lower oscillating screen plate are obliquely installed, pending molding sand drops down onto after on oscillating screen plate, to the first direction, elevator place slowly movement under the effect of vibration, while be filtered in molding sand moving process, while tiling is come, avoid the problem affecting oscillating screen plate filter efficiency because molding sand gathers immediately below fence all the time, and large granular impurity and out-of-size molding sand are automatically sent to oscillating screen plate overhead gage place, are convenient to centralized recovery process;

2) molding sand is trapped among wherein by cooling water coil and helical form cooling water pipe jointly, makes molding sand in cooling cylinder, be blown to any direction and all can obtain abundant heat exchange, greatly improve the cooling effect of cooling cylinder;

3) in order to improve on-the-spot working environment, avoiding dust pollution, above fence, above vibratory sieve, above each casting bed, being provided with dust shield, to remove the dust in air;

4) cleaner comprises cyclone dust collectors, sack cleaner and dedusting fan, dedusting fan provides suction, the systemic dust laden air of dust shield first removes oarse-grained dust through cyclone dust collectors, avoid the wearing and tearing of bulky grain dust to cloth bag on sack cleaner simultaneously, cloth bag is played a protective role; Then remove short grained dust through sack cleaner, the air after dedusting eventually passes dedusting fan and discharges, and cleaner adopts two-stage dedusting, and dust removing effects is better;

5) on upper oscillating screen plate, the closer to the position in the first direction, elevator place, material is more of a specified duration by the time vibrated above, therefore go up on oscillating screen plate, the closer to the position in the first direction, elevator place, large granular impurity is more easily shattered into granule with out-of-size molding sand and falls on the lower oscillating screen plate of below, and in the present invention, the through-hole aperture on upper oscillating screen plate is designed to reduce gradually to the other end in the first direction, elevator place from certain one end, then effectively can avoid the appearance of the problems referred to above.

(2) coordinating by grafting block and inserting groove in the present invention, can be arranged between two cross gates equally spacedly by multiple foundry goods evaporative pattern easily, the multiple foundry goods evaporative pattern of disposal pouring, improves production efficiency.

(3) coating prepared in the present invention, cost is low, the white module that is bonded in that can be firm fills surface, compared with the coating adopted in prior art, adopt the coating in invention, the disposable percentage that comes off of casting finished products dope layer is improved further, and the shaping rear smooth in appearance of foundry goods, casting finished products qualification rate also significantly rises.

(4) in the present invention in step ST4, with writing brush by groove surfaces all on foundry goods evaporative pattern and the thick coating of through-hole surfaces brush one deck 2 ~ 3mm, the molten iron rate of set of groove on foundry goods evaporative pattern and through hole can be slowed down, groove when making to pour into a mould on foundry goods evaporative pattern and the rate of set of through hole molten iron keep synchronous with the rate of set of other local molten iron on foundry goods evaporative pattern, effectively eliminate the internal stress that the shaping rear cast-internal of foundry goods is formed.

(5) medium casting of the present invention is put and is vibrated air quenching on a vibration table, and during air quenching, foundry goods can leave shake table, makes the whole outer surface of foundry goods all obtain uniform hardening, the quenching problem of non-uniform existed when can solve current wear resistance castings air quenching.

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

Accompanying drawing explanation

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

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

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

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

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

Fig. 6 is the left TV structure schematic diagram at A place in Fig. 4;

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

Fig. 8 is the left TV structure schematic diagram at B place in Fig. 7;

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

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

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

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

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

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

Label declaration in accompanying drawing:

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

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

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

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

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

Detailed description of the invention

For understanding content of the present invention further, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

Embodiment 1

Composition graphs 1 ~ 6 and Figure 13 ~ 14, the technique of the lost foam casting scraper wearing piece of the present embodiment, comprises the following steps,

Step ST1, prepare white mould;

In mould, pass into cooling water from top to bottom, after mold cools down, the patrix of mould is opened, then pass into compressed air from bottom to top in mould, white mould is ejected in mould; In the present embodiment, utilize compressed air to be ejected in mould by white mould, the problem of fragile white mould during artificial delivery can be avoided, improve white molded standby qualification rate.

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

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

Foundry goods evaporative pattern 3 and ingate 2 are integrated, ensure that molten iron successfully can flow into foundry goods evaporative pattern 3 through ingate 2, and without the need to foundry goods evaporative pattern 3 and ingate 2 being bonded by glue, time saving and energy saving; Be provided with ingate 2 to the bilateral symmetry of foundry goods evaporative pattern 3, this ingate 2 comprises drainage block 201 and grafting block 202, drainage block 201 and grafting block 202 are rectangular block, the width of grafting block 202 is equal with the width of drainage block 201, drainage block 201 and grafting block 202 be vertical common formation L shape structure mutually, drainage block 201 and foundry goods evaporative pattern 3 are connected, and the thickness of drainage block 201 is 1/4 ~ 1/2 (getting 1/4 in concrete the present embodiment) of grafting block 202 thickness; Grafting block 202 is for matching with above-mentioned inserting groove 102.

In order to ensure that grafting block 202 can securely be fixed in inserting groove 102, the width of grafting block 202 is greater than the width 2 ~ 3mm (getting 2mm in concrete the present embodiment) of inserting groove 102, make grafting block 202 clamp-on in inserting groove 102, inserting groove 102 makes grafting block 202 and fixing more firm of inserting groove 102 to the squeezing action of grafting block 202 in it.The thickness of grafting block 202 equals the degree of depth of inserting groove 102, and being convenient to grafting block 202 can insert in inserting groove 102 with agreeing with completely, makes not leave space between grafting block 202 and inserting groove 102, is conducive to molten iron smooth flow.

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

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

The both sides of drainage muscle 101 1 end are provided with contiguous block, the side of drainage muscle 101 end is connected with cross gate main body 104 by this contiguous block, the setting of contiguous block expands the cross section of drainage muscle 101 end, molten iron enters from this end of drainage muscle 101, expand the circulation area that molten iron enters drainage muscle 101 end, be conducive to molten iron smooth outflow.

Be often that a little rectangular block is connected on cast model by Design of Gate in prior art, when shaping foundry goods being cleared up after casting complete, the ingate coagulum be connected on foundry goods is needed to knock out, polishing is clean, but because ingate coagulum and foundry goods body are jointly shaping when pouring into a mould, often cause and knock out in ingate coagulum process, be not ingate coagulum stay one section be difficult on foundry goods body remove, partly also struck near foundry goods body and ingate coagulum junction, not only work consuming consuming time, and have a strong impact on the quality of foundry goods, add foundry goods defect rate.In order to overcome above-mentioned shortcoming, following improvement is made: ingate 2 comprises drainage block 201 and grafting block 202 in the present embodiment, drainage block 201 and foundry goods evaporative pattern 3 are connected, grafting block 202 is for matching with above-mentioned inserting groove 102, the thickness of drainage block 201 is 1/4 ~ 1/2 of grafting block 202 thickness, in the present embodiment, the thickness of drainage block 201 is less, greatly facilitate and knock out the coagulative process of ingate, namely the segment thickness that is connected with foundry goods body of ingate coagulum is less, come off and not adhesive tape foundry goods body part than being easier to knock out from foundry goods body, knock out the part come off more neat, be convenient to polishing, time and labour saving, improve the presentation quality of foundry goods, in the present embodiment, ingate 2 is designed to L shape, makes ingate coagulative L shape structure easily stressed, is convenient to knock out operation.

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

Existing scraper body designs for plane body, in concrete-agitating process, and the stirring between concrete has very large resistance, have very large deterioration at work, the installing hole place especially on scraper, the bolt in installing hole can be made damaged, in actual engineer applied, often easily cause scraper to be installed insecure or from the generation of the accidents such as mixing arm comes off, reduce the service life of scraper, thus add the loss of scraper wearing piece.In order to overcome above-mentioned shortcoming, following improvement is made: the surrounding of scraper installing hole 1303 is provided with one deck wear-resistant protective layer 13031 in the present embodiment, this wear-resistant protective layer 13031 exceeds the upper surface of scraper body 1302 and has certain thickness, significant protective effect is played to scraper installing hole 1303, when scraper works, after wear-resistant protective layer 13031 is worn loss completely, just can form wearing and tearing to scraper installing hole 1303, such design protects scraper installing hole 1303 and interior set bolt thereof greatly, improve the service life of scraper, thus reduce the loss of scraper wearing piece.

Step ST2, assemble white mould;

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

Step ST3, prepare coating;

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

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

Step ST4, swabbing;

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

In step ST4, with writing brush by groove surfaces all on foundry goods evaporative pattern 3 and the thick coating of through-hole surfaces brush one deck 2 ~ 3mm (getting 2mm in concrete the present embodiment), dry, in the present embodiment, groove surfaces all on foundry goods evaporative pattern 3 in advance and the thick coating of through-hole surfaces brush one deck 2 ~ 3mm, the paint thickness of groove surfaces all on foundry goods evaporative pattern 3 and through-hole surfaces is made to be greater than other parts on foundry goods evaporative pattern 3 comparatively speaking, therefore, groove when pouring into a mould on foundry goods evaporative pattern 3 and through hole and around thermal conductivity factor between molding sand less relative to other parts on foundry goods evaporative pattern 3, therefore, it is possible to the molten iron rate of set of the groove slowed down on foundry goods evaporative pattern 3 and through hole, groove when making to pour into a mould on foundry goods evaporative pattern 3 and the rate of set of through hole molten iron keep synchronous with the rate of set of other local molten iron on foundry goods evaporative pattern 3, the internal stress that the shaping rear cast-internal of effective elimination foundry goods is formed, the paint thickness of foundry goods evaporative pattern 3 upper groove surface and through-hole surfaces is thicker simultaneously, and after foundry goods is shaping, pole is not easy to be stained with sand herein, facilitates follow-up sand removal operation.It should be noted that, inventor sums up through a large amount of field experiment, when foundry goods evaporative pattern 3 upper groove surface and the through-hole surfaces coating that brush one deck 2 ~ 3mm is thick in advance, the above-mentioned technique effect of guarantee, when coating too thick or too thin time, groove when all can not effectively ensure to pour into a mould on foundry goods evaporative pattern 3 and the rate of set of through hole molten iron keep synchronous with the rate of set of other local molten iron on foundry goods evaporative pattern 3.

Step ST5, dip-coating material;

In step ST5, prepare white mould assembly, the cross gate 1 vertically arranged foundry goods evaporative pattern 3 both sides is bundled in the two side arms of fixed mount 4 respectively by rope, and fixed mount 4 is rectangular frame; Then fixed mount 4 entirety is immersed in coating pond, take out fixed mount 4 and dry; Again fixed mount 4 entirety is immersed in coating pond, take out fixed mount 4 and again dry.In the present embodiment, during by white mould assembly entirety coating coating, need white mould assembly to be fixed by fixed mount 4, to protect the overall structure of white mould assembly.

Step ST6, moulding;

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

Step ST7, cast;

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

Step ST8, molding sand reclaim;

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

Wherein, sand preparing system comprises fence 1-1, vibratory sieve, the first elevator 1-4, cooling cylinder 1-7, dust shield 1-9, the second elevator 1-10, conveyer belt 1-11, casting bed 1-12 and sandbox 1-13, the below of fence 1-1 arranges vibratory sieve, this vibratory sieve comprises the upper oscillating screen plate 1-2 be all connected with vibrating motor, lower oscillating screen plate 1-3, upper oscillating screen plate 1-2 and lower oscillating screen plate 1-3 is upper and lower be arranged in parallel, upper oscillating screen plate 1-2 is evenly equipped with through hole, and the two ends of upper oscillating screen plate 1-2 are equipped with baffle plate, one end of lower oscillating screen plate 1-3 is provided with baffle plate, and the other end, to the inclined downward in the first direction, elevator 1-4 place, makes the angle of lower oscillating screen plate 1-3 and horizontal plane be 4 ~ 5 ° (being 4 °) in concrete the present embodiment, in the present embodiment, due to being obliquely installed of upper oscillating screen plate 1-2 and lower oscillating screen plate 1-3, pending molding sand is dropped down onto after on oscillating screen plate 1-2, can to the first direction, elevator 1-4 place slowly movement under the effect of vibration, while be filtered in molding sand moving process, while tiling is come, avoid the problem affecting oscillating screen plate 1-2 filter efficiency because molding sand gathers immediately below fence 1-1 all the time, and the large granular impurity stayed after upper oscillating screen plate 1-2 filters and out-of-size molding sand are automatically sent to the end-stopping plate place near the first elevator 1-4 on upper oscillating screen plate 1-2, be convenient to centralized recovery process large granular impurity and out-of-size molding sand, the molding sand of size qualification is at the uniform velocity delivered on the first elevator 1-4 on lower oscillating screen plate 1-3, wherein, inventor is through repeatedly field practice summary discovery, the angle of lower oscillating screen plate 1-3 and horizontal plane is designed to 4 ~ 5 ° (angle also namely going up oscillating screen plate 1-2 and horizontal plane is 4 ~ 5 °), ensure that the molding sand on oscillating screen plate 1-2 can at the uniform velocity tile, ensure its filter effect, also make the molding sand of size qualification on lower oscillating screen plate 1-3 can at the uniform velocity gently move on the first elevator 1-4, adapt with the unit interval sand treating capacity of sand preparing system in the present embodiment.First elevator 1-4 is positioned at the side of lower oscillating screen plate 1-3, first elevator 1-4 is for being promoted to cooling cylinder 1-7 porch by the molding sand that lower oscillating screen plate 1-3 flows down, cooling cylinder 1-7 porch is provided with magnetic separator 1-5, this magnetic separator 1-5 is used for the molding sand entered in cooling cylinder 1-7 to carry out magnetic separation process, in the present embodiment, pending molding sand first filters out after large granular impurity (comprising bulky grain irony impurity) and out-of-size molding sand through upper oscillating screen plate 1-2, magnetic separation process is carried out again by magnetic separator 1-5, such design significantly reduces the workload of magnetic separator 1-5, be conducive to the treatment effect and the treatment effeciency that improve molding sand.The top in cooling cylinder 1-7 exit is provided with dust shield 1-9, this dust shield 1-9 not only plays in the effect absorbing cooling cylinder 1-7 exit absorption dust laden air, also form local decompression in cooling cylinder 1-7 exit, make cooling cylinder 1-7 porch and exit form pressure reduction, the molding sand of cooling cylinder 1-7 porch moves under above-mentioned differential pressure action in cooling cylinder 1-7.

Casting technique from evaporative pattern and the requirement to equipment, molding sand has fragmentation and efflorescence unavoidably in moulding use and sand processing procedure, simultaneously, the coating dust decomposed in casting process also can be mixed into wherein, the performance of molding sand can be worsened, reduce its gas permeability, consume more coating in coating step, the dust therefore needing molding sand is broken and efflorescence and coating to decompose and formed removes.

In the present embodiment, cooling cylinder 1-7 mainly plays 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-mentioned three ajutage 1-8 equidistantly distribute along cooling cylinder 1-7 length direction and are all connected with the air outlet of high pressure positive blower 1-6; The inwall of cooling cylinder 1-7 is surrounded with cooling water coil, and position, the axis erection of cooling cylinder 1-7 inside has helical form cooling water pipe.Molding sand is blown afloat by the gases at high pressure that three ajutage 1-8 pass in cooling cylinder 1-7, the helical form cooling water pipe that main and cooling cylinder 1-7 axis line inside position is set up by the molding sand that blows afloat carries out heat exchange, simultaneously, molding sand also carries out heat exchange blowing afloat the cooling water coil put with the winding of cooling cylinder 1-7 inwall pressed on ring in process, molding sand is rapidly cooled after helical form cooling water pipe and the common heat exchange of cooling water coil, exports mobile under local decompression's effect that cooling cylinder 1-7 exit is formed to cooling cylinder 1-7.In the present embodiment, molding sand is trapped among wherein by cooling water coil and helical form cooling water pipe jointly, makes molding sand in cooling cylinder 1-7, be blown to any direction and all can obtain abundant heat exchange, greatly improve the cooling effect of cooling cylinder 1-7.In the present embodiment, molding sand is blown afloat by the gases at high pressure that three ajutage 1-8 pass in cooling cylinder 1-7, molding sand can not only be made fully to spread and to improve its heat transfer effect, make the dust in molding sand fully be kicked up, the dust in molding sand all siphons away by the dust shield 1-9 being conducive to arranging above cooling cylinder 1-7 exit simultaneously.

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

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

In the present embodiment, in order to improve on-the-spot working environment, avoid dust pollution, above fence 1-1, above vibratory sieve, above (not shown), each casting bed 1-12, (not shown) is provided with dust shield 1-9, to remove the dust in air.

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

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

In sum, the sand preparing system in the present embodiment, its smart structural design, manufacture and operating cost lower.

Step ST9, casting cleaning;

Step ST10, heat treatment;

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

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

Technology for Heating Processing in the present embodiment, compares Technology for Heating Processing of the prior art, obviously can promote the hardness of foundry goods, foundry goods is after the Technology for Heating Processing process in the present embodiment, its HRC hardness is promoted to 60 ~ 65, and cast(ing) surface hardness is even, can adapt to actual user demand better.

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

Embodiment 2

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

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

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

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

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

Embodiment 3

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

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

Embodiment 4

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

Embodiment 5

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

The upper surface of Leaf body 3302 front portion, lower surface are all to tilting therebetween, and the angle of Leaf body 3302 front upper surface and lower surface is α=10 ~ 11 ° (getting 10 ° in concrete the present embodiment); The Leaf body 3302 of unique texture in the present embodiment is adopted can significantly to promote its serviceability and service life.Secondly, in order to alleviate the weight of Leaf body 3302 after casting, reduce manufacturing cost, in the present embodiment, Leaf body 3302 is designed to T-shaped structure, Leaf body 3302 is symmetrically provided with two Leaf lightening grooves 3304, under the prerequisite ensureing Leaf body 3302 structural strength, alleviate the weight of Leaf body 3302.

Existing Leaf is in concrete-agitating process, and the stirring between concrete has very large resistance, have very large deterioration at work, especially the installing hole place on Leaf, bolt in installing hole can be made damaged, in actual engineer applied, often easily cause Leaf that generation that the is insecure or accident such as directly to come off is installed, reduce the service life of Leaf, thus add the loss of wearing piece.In order to overcome above-mentioned shortcoming, in the present embodiment: the surrounding of Leaf installing hole 3303 is provided with one deck Leaf wear-resistant protective layer 33031, this Leaf wear-resistant protective layer 33031 exceeds the upper surface of Leaf body 3302 and has certain thickness, significant protective effect is played in centering blades installation hole 3303, when Leaf works, after Leaf wear-resistant protective layer 33031 is worn loss completely, just can form wearing and tearing in centering blades installation hole 3303, such design protects Leaf installing hole 3303 and interior bolt thereof greatly, improve the service life of Leaf, thus reduce the loss of wearing piece.

Embodiment 6

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

Schematically above be described the present invention and embodiment thereof, this description does not have restricted, and also just one of the embodiments of the present invention shown in accompanying drawing, actual structure is not limited thereto.So, if those of ordinary skill in the art enlightens by it, when not departing from the invention aim, designing the frame mode similar to this technical scheme and embodiment without creationary, all should protection scope of the present invention be belonged to.

Claims

1. a technique for lost foam casting wearing piece, is characterized in that: comprise the following steps,

Step ST1, prepare white mould;

Wherein, described white mould comprises cross gate (1), ingate (2) and foundry goods evaporative pattern (3).

Step ST2, assemble white mould;

Step ST3, prepare coating;

Step ST4, swabbing;

Step ST5, dip-coating material;

Step ST6, moulding;

Step ST7, cast;

Step ST8, molding sand reclaim;

Step ST9, casting cleaning;

Step ST10, heat treatment.

2. the technique of lost foam casting wearing piece according to claim 1, it is characterized in that: Bai Mozhong prepared by step ST1, described cross gate (1) is strip, cross gate (1) comprises cross gate main body (104), this cross gate main body (104) upper middle position is provided with drainage muscle (101) along its length, cross gate main body (104) top is also provided with some inserting grooves (102) along its length equally spacedly, offers lightening grooves (103) to the bilateral symmetry of described drainage muscle (101);

Described foundry goods evaporative pattern (3) and ingate (2) are integrated, be provided with ingate (2) to the bilateral symmetry of foundry goods evaporative pattern (3), this ingate (2) comprises drainage block (201) and grafting block (202), described drainage block (201) and grafting block (202) be vertical common formation L shape structure mutually, the thickness of drainage block (201) is less than the thickness of grafting block (202), drainage block (201) and foundry goods evaporative pattern (3) are connected, and grafting block (202) is for matching with above-mentioned inserting groove (102);

Described lightening grooves (103) adopts arc transition with the intersection of inserting groove (102); Described cross gate main body (104) top is provided with 3 ~ 8 inserting grooves (102) along its length equally spacedly; The thickness of described drainage block (201) is 1/4 ~ 1/2 of grafting block (202) thickness;

The length direction of described inserting groove (102) is parallel to cross gate main body (104) width, and this inserting groove (102) is made up of two side and rear wall; Drainage block (201) and grafting block (202) are rectangular block, the rectangular channel that described inserting groove (102) is one end open;

The width of described grafting block (202) is equal with the width of drainage block (201), the width of grafting block (202) is greater than the width 2 ~ 3mm of inserting groove (102), and the thickness of grafting block (202) equals the degree of depth of inserting groove (102);

The both sides of described drainage muscle (101) end are provided with contiguous block, and the side of drainage muscle (101) end is connected with cross gate main body (104) by this contiguous block.

3. the technique of lost foam casting wearing piece according to claim 2, it is characterized in that: in step ST2, two cross gates (1) are vertically arranged, make the inserting groove (102) on two cross gates (1) facing each other, 3 ~ 8 foundry goods evaporative patterns (3) are positioned between two cross gates (1), and at least at a distance of 5mm between adjacent foundry goods evaporative pattern (3), the ingate (2) of foundry goods evaporative pattern (3) both sides matches with the cross gate (1) of respective side respectively, obtains white mould assembly.

4. the technique of lost foam casting wearing piece according to claim 2, it is characterized in that: in step ST3, refractory aggregate, organic binder, anhydrous adhesive, suspending agent, thickening stabilizing agent, defoamer and anticorrisive agent are mixed and obtains coating, wherein: refractory aggregate accounts for 17 ~ 18% of coating gross mass, refractory aggregate is the mixture of brown alundum powder and silica flour, and the particle diameter of described brown alundum powder and silica flour is more than 300 orders; Organic binder is the mixture of sodium carboxymethylcellulose and white glue with vinyl, and described sodium carboxymethylcellulose accounts for 0.2 ~ 0.6% of coating gross mass, and white glue with vinyl accounts for 3 ~ 6% of coating gross mass, the polyvinyl alcohol containing mass percent 20% in described white glue with vinyl; Anhydrous adhesive is Ludox, and described Ludox accounts for 3 ~ 8% of coating gross mass; Suspending agent is sodium bentonite, and described sodium bentonite accounts for 1 ~ 4% of coating gross mass; Thickening stabilizing agent is polyacrylamide, and described polyacrylamide accounts for 0.1 ~ 0.2% of coating gross mass.

5. the technique of lost foam casting wearing piece according to claim 3, is characterized in that:

In step ST4, with writing brush by upper for foundry goods evaporative pattern (3) all groove surfaces and the thick coating of through-hole surfaces brush one deck 2 ~ 3mm, dry;

In step ST5, prepare white mould assembly, the cross gate (1) vertically arranged foundry goods evaporative pattern (3) both sides is bundled in the two side arms of fixed mount (4) respectively by rope, and described fixed mount (4) is rectangular frame; Then fixed mount (4) entirety is immersed in coating pond, take out fixed mount (4) and dry; Again fixed mount (4) entirety is immersed in coating pond, take out fixed mount (4) and again dry;

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

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

6. the technique of lost foam casting wearing piece according to claim 3, is characterized in that:

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

Wherein, described sand preparing system comprises fence (1-1), vibratory sieve, the first elevator (1-4), cooling cylinder (1-7), dust shield (1-9), the second elevator (1-10), conveyer belt (1-11), casting bed (1-12) and sandbox (1-13), the below of described fence (1-1) arranges vibratory sieve, this vibratory sieve comprises the upper oscillating screen plate (1-2) be all connected with vibrating motor, lower oscillating screen plate (1-3), upper oscillating screen plate (1-2) and lower oscillating screen plate (1-3) is upper and lower be arranged in parallel; Described upper oscillating screen plate (1-2) is evenly equipped with through hole, and the two ends of upper oscillating screen plate (1-2) are equipped with baffle plate; One end of described lower oscillating screen plate (1-3) is provided with baffle plate, and the other end is to the inclined downward in the first elevator (1-4) direction, place; Described first elevator (1-4) is positioned at the side of lower oscillating screen plate (1-3), first elevator (1-4) is for being promoted to cooling cylinder (1-7) porch by the molding sand that lower oscillating screen plate (1-3) flows down, and the top in cooling cylinder (1-7) exit is provided with dust shield (1-9); Described second elevator (1-10) is positioned at the side in cooling cylinder (1-7) exit, and the second elevator (1-10) is promoted to conveyer belt (1-11) for the molding sand flowed down in cooling cylinder (1-7) exit; Described conveyer belt (1-11) is positioned at least three casting beds (1-12) top, conveyer belt (1-11) is for being delivered in casting bed (1-12) by molding sand, the below of casting bed (1-12) is provided with sandbox (1-13);

Described sand preparing system also comprises vacuum distribution (1-14), and this vacuum distribution (1-14) is provided with multiple access port, and this access port is connected with the vacuum orifice on sandbox (1-13) by pipeline; Described vacuum distribution (1-14) is connected with vaccum-pumping equipment;

Described cooling cylinder (1-7) porch is provided with magnetic separator (1-5), and this magnetic separator (1-5) is for carrying out magnetic separation process by the molding sand entered in cooling cylinder (1-7);

Described cooling cylinder (1-7) bottom surface is connected with three ajutages (1-8) respectively, and above-mentioned three ajutages (1-8) equidistantly distribute along cooling cylinder (1-7) length direction and are all connected with the air outlet of high pressure positive blower (1-6); The inwall of described cooling cylinder (1-7) is surrounded with cooling water coil, and position, the axis erection of cooling cylinder (1-7) inside has helical form cooling water pipe;

Above described fence (1-1) top, vibratory sieve, above each casting bed (1-12), be provided with dust shield (1-9);

Described dust shield (1-9) is all connected with cleaner, this cleaner comprises cyclone dust collectors, sack cleaner and dedusting fan, described dust shield (1-9) is connected with the entrance of cyclone dust collectors, and the outlet of cyclone dust collectors is connected with dedusting fan by sack cleaner;

Described lower oscillating screen plate (1-3) is 4 ~ 5 ° with the angle of horizontal plane;

Through-hole aperture on described upper oscillating screen plate (1-2) reduces to the other end in the first elevator (1-4) direction, place gradually from certain one end;

A track slided for sandbox (1-13) is equipped with between the below of each casting bed (1-12) and fence (1-1);

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

7. the technique of lost foam casting wearing piece according to claim 3, it is characterized in that: in step ST10, foundry goods is put into heating furnace, through 4.5 ~ 5h constant-speed heating to 945 ~ 950 DEG C, then 2 ~ 3h is incubated, 860 ~ 865 DEG C are cooled to again, air cooling of coming out of the stove, wherein through 1 ~ 2h, during air cooling, foundry goods is put and vibrate on a vibration table, and in the horizontal direction to shake table air blast, the uniform through hole in shake table surface, the height of foundry goods vibration is 15 ~ 25mm.

8. one kind utilizes the technique of the lost foam casting wearing piece in claim 1 ~ 7 described in any one to cast the technique of scraper wearing piece, it is characterized in that: Bai Mozhong prepared by step ST1, described foundry goods evaporative pattern (3) is scraper evaporative pattern (13), this scraper evaporative pattern (13) comprises scraper body (1302) and scrapes the edge of a knife (1301), scrape the side that the edge of a knife (1301) is positioned at scraper body (1302), two scraper installing holes (1303) are provided with symmetrically before and after scraper body (1302) is upper, this scraper installing hole (1303) is waist-shaped hole, the surrounding of scraper installing hole (1303) is provided with one deck wear-resistant protective layer (13031), this wear-resistant protective layer (13031) exceeds the upper surface of scraper body (1302), and wear-resistant protective layer (13031) adopts arc transition with the junction of scraper body (1302),

The described outer surface scraping the edge of a knife (1301) comprises the first inclined plane (13011), second inclined plane (13012), 3rd inclined plane (13013) and the 4th inclined plane (13014), described first inclined plane (13011) is for scraping the upper surface of the edge of a knife (1301), first inclined plane (13011) is inclined upwardly, second inclined plane (13012) is connected with the first inclined plane (13011), and the second inclined plane (13012) is downward-sloping, 4th inclined plane (13014) is for scraping the lower surface of the edge of a knife (1301), second inclined plane (13012) is connected with the 4th inclined plane (13014) by the 3rd inclined plane (13013),

The rear and front end of described scraper body (1302) is provided with scraper lightening grooves (1304) symmetrically;

Described first inclined plane (13011) and horizontal angle are 30 ~ 35 °, and the second inclined plane (13012) is 50 ~ 55 ° with the angle of vertical line; Described wear-resistant protective layer (13031) exceeds the upper surface 5 ~ 6mm of scraper body (1302).

9. one kind utilizes the technique of the lost foam casting wearing piece in claim 1 ~ 7 described in any one to cast the technique of lateral lobe sheet wearing piece, it is characterized in that: Bai Mozhong prepared by step ST1, described foundry goods evaporative pattern (3) is lateral lobe sheet evaporative pattern (23), this lateral lobe sheet evaporative pattern (23) comprises side blade body (2302), first use portion (2301) and the second use portion (2305), described first use portion (2301), second use portion (2305) lays respectively on two adjacent sides of side blade body (2302), described second use portion (2305) exceeds the upper surface of side blade body (2302), the outer wall in the second use portion (2305) is arcwall face, be provided with two lateral lobe sheet installing holes (2303) symmetrically before and after side blade body (2302) is upper, this lateral lobe sheet installing hole (2303) is waist-shaped hole, the surrounding of lateral lobe sheet installing hole (2303) is provided with one deck lateral lobe sheet wear-resistant protective layer (23031), this lateral lobe sheet wear-resistant protective layer (23031) exceeds the upper surface of side blade body (2302), and lateral lobe sheet wear-resistant protective layer (23031) adopts arc transition with the junction of side blade body (2302),

The outer surface in described first use portion (2301) comprises lateral lobe sheet first inclined plane (23011), lateral lobe sheet second inclined plane (23012), lateral lobe sheet the 3rd inclined plane (23013) and lateral lobe sheet the 4th inclined plane (23014), described lateral lobe sheet first inclined plane (23011) is the upper surface in the first use portion (2301), lateral lobe sheet first inclined plane (23011) is downward-sloping, lateral lobe sheet the 4th inclined plane (23014) is the lower surface in the first use portion (2301), lateral lobe sheet the 4th inclined plane (23014) is downward-sloping, lateral lobe sheet the 3rd inclined plane (23013) is connected with lateral lobe sheet the 4th inclined plane (23014), and lateral lobe sheet the 3rd inclined plane (23013) is inclined upwardly, lateral lobe sheet the 3rd inclined plane (23013) is connected with lateral lobe sheet first inclined plane (23011) by lateral lobe sheet second inclined plane (23012),

The side in non-first use portion (2301), described side blade body (2302) and the second use portion (2305) is provided with loss of weight breach (2304); Described side blade body (2302) is provided with baffle plate (2306), this baffle plate (2306) exceeds the upper surface of side blade body (2302), and baffle plate (2306) and the second use portion (2305) are oppositely arranged;

Described lateral lobe sheet the 3rd inclined plane (23013) and horizontal angle are 50 ~ 55 °, and described lateral lobe sheet second inclined plane (23012) is 90 ° with the angle of lateral lobe sheet the 3rd inclined plane (23013); Described lateral lobe sheet wear-resistant protective layer (23031) exceeds the upper surface 5 ~ 6mm of side blade body (2302).

10. one kind utilizes the technique of the lost foam casting wearing piece in claim 1 ~ 7 described in any one to cast the technique of Leaf wearing piece, it is characterized in that: Bai Mozhong prepared by step ST1, described foundry goods evaporative pattern (3) is Leaf evaporative pattern (33), this Leaf evaporative pattern (33) comprises Leaf body (3302) and use portion (3301), described Leaf body (3302) is T-shaped structure, the rear side of Leaf body (3302) is provided with use portion (3301), this use portion (3301) exceeds the upper surface of Leaf body (3302), use portion (3301) is arc transition with the junction of Leaf body (3302), be provided with two Leaf installing holes (3303) symmetrically before and after Leaf body (3302) is upper, this Leaf installing hole (3303) is circular port, the surrounding of Leaf installing hole (3303) is provided with one deck Leaf wear-resistant protective layer (33031), this Leaf wear-resistant protective layer (33031) exceeds the upper surface of Leaf body (3302), and Leaf wear-resistant protective layer (33031) adopts arc transition with the junction of Leaf body (3302),

The upper surface that described Leaf body (3302) is anterior, lower surface are all to tilting therebetween, and the angle of Leaf body (3302) front upper surface and lower surface is α;

Described α is 10 ~ 11 °; Described Leaf wear-resistant protective layer (33031) exceeds the upper surface 5 ~ 6mm of side blade body (302);

Described Leaf body (3302) is symmetrically provided with two Leaf lightening grooves (3304).