CN105499504B

CN105499504B - A kind of technique of lost foam casting wearing piece

Info

Publication number: CN105499504B
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: 2017-06-16
Anticipated expiration: 2035-12-29
Also published as: CN107096887A; CN106583650A; CN107096887B; CN106734912A; CN106734912B; CN106583650B; CN105499504A

Abstract

The invention discloses a kind of technique of lost foam casting wearing piece, belong to lost foam casting process field.The technique of lost foam casting wearing piece of the invention, comprises the following steps, and step ST1, prepares white mould：Wherein, Bai Mo includes cross gate, ingate and casting evaporative pattern；Step ST2, the white mould of assembling：Two cross gates are vertically arranged so that the inserting groove on two cross gates is facing each other, casting evaporative pattern is located between two cross gates, and the ingate of casting evaporative pattern both sides is engaged with the cross gate of respective side respectively, obtains white mould assembly；Step ST3, prepare coating；Step ST4, swabbing；Step ST5, dip-coating material；Step ST6, moulding；Step ST7, cast；Step ST8, molding sand are reclaimed；Step ST9, casting cleaning；Step ST10, heat treatment.The main function of realizing lifting wearing piece castability of the invention.

Description

A kind of technique of lost foam casting wearing piece

Technical field

The present invention relates to a kind of lost foam casting process, more specifically to a kind of work of lost foam casting wearing piece Skill.

Background technology

Technology of EPC is will to bond to be combined into model cluster with casting dimension shape identical foamed plastic model, is brushed After applying refractory coating and drying, vibration molding in drystone sand is embedded in, liquid metals is poured into a mould under certain condition, model is gasified And modal position is occupied, the method for casting needed for being formed after solidification cooling.Compared with traditional foundry engieering, due to using easily The foamed plastics of gasification makes model, without modulus and making core rod, without die joint, thus non-trimming burr, the technical process Abandoned traditional handicraft complex procedures completely, the unfavorable factor that course of work pollutant discharge amount is big, labor strength is high, it is real Existing is a kind of simple operation, efficiency high, nearly non-harmful clean manufacturing.

Lost foam casting field, needs to use cross gate and ingate, ingate and casting evaporative pattern in casting process Be connected, for liquid metals to be drained into casting evaporative pattern in be molded cast casting；Cross gate disappears for connecting multiple casting Lose mould so that once-cast being capable of casting multiple casting.But, the manufacturer of lost foam casting process in the prior art In order to follow the line of least resistance, often individually purchase foam board cuts to form cross gate so that cross gate and ingate are split type, are being poured Need to be glued together cross gate and ingate by glue before casting, this way had not only been taken a lot of work laborious but also virtually increased production Cost, and cross gate often bonded with ingate it is insecure, in handling process or sandbox note sand jolt ramming during easily occur Obscission, reduces casting quality, meanwhile, the generally rectangular cross-section long slab of cross gate is unfavorable for the flowing of liquid metals.Secondly, In the prior art often by Design of Gate for a small rectangular block is connected on casting evaporative pattern, to shaping after casting complete Casting when being cleared up, it is necessary to the ingate coagulum that will be connected on casting knock out, polishing, but due to ingate solidification In cast it is common shaping with casting body, often results in knockout ingate process of setting, is not ingate coagulum Leave one section to be difficult to clean off on casting body, partly also struck down near casting body and ingate coagulum junction Come, not only time-consuming work consuming, and have a strong impact on the quality of casting, increased casting defect rate.

On lost foam casting process, related art scheme is disclosed in the prior art, such as patent publication No.：CN 104690225A, publication date：On June 10th, 2015, invention and created name is：A kind of lost foam casting of casting good mechanical property Technique, this application case discloses a kind of lost foam casting process of casting good mechanical property, comprises the following steps：Using foaming material Material piecemeal is made each critical piece, and each critical piece bonding that will be made is made casting evaporative pattern；For casting evaporative pattern is bonded Running channel, and it is made final mask in casting evaporative pattern and running channel outer application refractory material；Final mask is put into sandbox, is filled out Enter dry sand, using three-dimensional vibrating-compaction table jolt ramming, plastic foil is covered on sandbox；From top to down uniformly negative pressure is passed through in sandbox Air-flow to negative pressure reaches -0.04~-0.08MPa, and the negative-pressure air-flow uses oxygen, nitrogen, the mixed gas of carbon dioxide；Will be molten The metal of change is poured into the region where correspondence final mask in sandbox, and final mask gasification disappears, metal replacement final mask, Casting is obtained after cooling.But, it is connected to again by glue bonding between this application case medium casting evaporative pattern and cross gate Together, the problems such as influence group mould time, casting quality still occurs.

The technique of lost foam casting process includes white area, black area and yellow area technique, in existing Technology of EPC, Black area is the operation for carrying out sand treatment, screened by by the molding sand well sand preparing system after, after the treatment such as dedusting again Reuse is given birth to, its Main Function is：Screen out impurity (debris such as sand lump, scum, coating dust), cooling, conveying and storage in molding sand Molding sand.From the point of view of casting technique from evaporative pattern and the requirement to equipment, dry sand has unavoidably in moulding use and cyclic process Broken and efflorescence, meanwhile, the coating dust decomposed in casting process can also be mixed into and can wherein deteriorate the performance of molding sand, reduce saturating Gas, consumes more binding agents, it is therefore desirable to remove the broken dust for decomposing and being formed with efflorescence and coating of molding sand.Separately Outward, the initial temperature after the molding sand demoulding is very high, generally there is 200~500 DEG C, in evaporative pattern production, when sand temperature is too high, Film can be scorched in modeling process or film warpage is caused, therefore before moulding, sand temperature should as far as possible control 55 DEG C with It is lower just to reuse, it is therefore desirable to which that efficient cooling device could be realized.Therefore, it is configured without the disappearance of sand preparing system Die cast technique, it is difficult to show lost foam casting production environment it is excellent the characteristics of and ensure the stability of product quality.It is existing Lost foam casting process in general configuration sand preparing system, but existing sand preparing system often complex structure, manufacture and Operating cost is higher.

Through retrieval, application publication number：The A of CN 103909216, publication date：On July 9th, 2014, invention and created name is： A kind of Lost Form Casting Production Line sand preparing system, this application case discloses a kind of evaporative pattern sand preparing system, including knockout is clear Reason system, ash disposal cooling system, select sand system, sand induction system, center sand storage, middle sand storage, filling moulding system, dedusting system System, control system, sand induction system are made up of four conveying devices, and peeling system is by the first conveying device and middle sand Storehouse is connected, and middle sand storage is connected by the second conveying device with ash disposal cooling system, and ash disposal cooling system is by the 3rd conveying Device is connected with sand system is selected, and selects sand system to be connected with center sand storage and filling moulding system respectively by the 4th conveying device Connect, dust pelletizing system and control system and peeling system, ash disposal cooling system, select sand system, sand induction system, center sand Storehouse, middle sand storage, filling moulding system, are respectively connected with.But, the sand preparing system complex structure of this application case, manufacture and Operating cost is higher.

Mixer application widely, can be applied to building field, field of Environment Protection etc., essential element in mixer Including scraper and paddle (paddle generally comprises the lateral lobe piece and Leaf that are applied in combination), they rise emphatically in mixer The effect wanted, scraper and paddle are typically manufactured using lost foam casting process, are used as wearing piece.In engineer applied, Because existing scraper and paddle are during concrete-agitating, the stirring between concrete has very big resistance, in work Very big deterioration is had in work, especially at the mounting hole on scraper and paddle, can cause that the bolt in mounting hole breaks Damage, in actual engineer applied, tend to cause scraper and paddle to install insecure or even directly come off, reduce scraper With the service life of paddle, so as to increased the loss of wearing piece.

Through retrieval, Chinese Patent Application No.：2010201484235, publication date：On December 1st, 2010, invention and created name For：A kind of scraper, this application case discloses a kind of scraper, including scrapes cutter hub, and the one end for scraping cutter hub is provided with and scrapes the edge of a knife, and the other end sets There is handle of a knife, the outer surface for scraping the edge of a knife is welded with one layer of compound carbonizing chromium and carbonization niobium alloy, scrapes the edge of a knife and is all wrapped in alloy-layer Interior, the two sides for scraping cutter hub and handle of a knife are welded with latticed alloy, and latticed alloy is connected with each other with the alloy for scraping the edge of a knife, scrapes The material of cutter hub is manganese steel or ordinary carbon steel；Relative to prior art, this application case makees scraper using manganese steel or ordinary carbon steel Matrix, and make wearing layer in matrix surface welding compound carbonizing chromium and carbonization niobium alloy, than the anti-wear performance of conventional cast scraper 2~3 times are improved, the service life of scraper is extended, but the through hole that handle of a knife surface is provided with this application case is still easily ground Loss, can cause scraper to install insecure or the accident such as come off from mixing arm generation, reduce the service life of scraper, So as to increased the loss of wearing piece.

Chinese Patent Application No.：2010206563252, publication date：On August 24th, 2011, invention and created name is：Coagulation The paddle of native mixer, this application case discloses a kind of paddle of concrete mixer, includes T-shaped blade, leaf Piece is provided with twice bar shaped slideway, and mounting hole is respectively equipped between twice bar shaped slideway, and twice bar shaped slideway outside is respectively equipped with Groove.The paddle reasonable in design of this application case, weight saving coordinates easy for installation with miscellaneous part, improves stirring Efficiency.But, the mounting hole being provided between twice bar shaped slideway in this application case is still easily worn loss, can cause stirring Leaf installs insecure or the accident such as directly come off generation, the service life of paddle is reduced, so as to increased wearing piece Loss.

The content of the invention

1. the invention technical problem to be solved

It is an object of the invention to overcome above-mentioned deficiency of the prior art, there is provided a kind of lost foam casting wearing piece Technique, mainly realizes the function of lifting wearing piece castability.

2. technical scheme

To reach above-mentioned purpose, the technical scheme that the present invention is provided is：

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

Step ST1, prepare white mould；

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

The foam obtained after prefoam is rushed in mould using compressed air, to the steaming that 50~100 DEG C are passed through in mould Vapour, foaming obtains Bai Mo；

To being passed through cooling water from top to bottom in mould, the upper mould of mould is opened after after mould cooling, then in mould from Compressed air is passed through on down, white mould is ejected from mould；

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

Step ST2, the white mould of assembling；

Step ST3, prepare coating；

Step ST4, swabbing；

Step ST5, dip-coating material；

Step ST6, moulding；

Step ST7, cast；

Step ST8, molding sand are reclaimed；

Step ST9, casting cleaning；

Step ST10, heat treatment.

Used as Bai Mozhong prepared by further improvement of the present invention, step ST1, the cross gate is strip, horizontal to pour Road includes cross gate main body, and the cross gate body top centre position is provided with drainage muscle, cross gate body top along its length Some inserting grooves are also equally spacedly provided with along its length, and the both sides of the drainage muscle symmetrically offer lightening grooves；

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

The lightening grooves use arc transition with the intersection of inserting groove；The cross gate body top is along its length etc. Spacing it is provided with 3~8 inserting grooves；The thickness of the drainage block is the 1/4~1/2 of grafting block thickness；

, parallel to cross gate body width direction, the inserting groove is by two side and rear wall group for the length direction of the inserting groove Into；Drainage block and grafting block are rectangular block, and the inserting groove is the rectangular channel of one end open；

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

The both sides of the drainage muscle one end are provided with contiguous block, and the contiguous block is by the side of drainage muscle end and cross gate master Body phase connects.

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

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

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

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

In step ST6, first sandbox bottom spread a stratotype sand, using three-dimensional vibrating-compaction table jolt ramming, shake it is smooth, by white module dress Body is removed from fixed mount, then white mould assembly is hung into middle part in sandbox, is at the uniform velocity added by casting bed sandbox downwards Sand simultaneously vibrates sandbox, and the amplitude of sandbox is 0.2~0.4mm, until stopping plus sand during molding sand 10~20mm suitable for reading from sandbox, stops Plus stop vibration after 30~45s of sand, plastic sheeting is then laid at the top of sandbox, and with dry sand gland plastic sheeting, place Sprue cup, it is to be cast；

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

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

As further improvement of the present invention, in step ST8, molding sand recovery is carried out using sand preparing system, by sandbox Move on fence and mould turnover, casting is intercepted by fence, and molding sand is dropped down onto on upper oscillating screen plate by the through hole on fence, with above shaking The vibration of dynamic sieve plate, the molding sand of size qualification is fallen on lower oscillating screen plate by the through hole on upper oscillating screen plate, impurity and size Underproof molding sand is left on oscillating screen plate；Molding sand on lower oscillating screen plate is promoted to cooling cylinder and enters by the first elevator At mouth, and magnetic separation treatment is carried out in cooling cylinder porch, the molding sand after magnetic separation treatment enters cooling, dedusting in cooling cylinder, cool down, Molding sand after dedusting is passed sequentially through in the second elevator, tape transport to each casting bed, completes molding sand removal process；

Wherein, the sand preparing system includes fence, vibratory sieve, the first elevator, cooling cylinder, dust shield, the second lifting Machine, conveyer belt, casting bed and sandbox, the lower section of the fence set vibratory sieve, and the vibratory sieve includes what is be connected with vibrating motor Upper oscillating screen plate, lower oscillating screen plate, upper oscillating screen plate and lower oscillating screen plate is upper and lower be arranged in parallel；On the upper oscillating screen plate Through hole is furnished with, the two ends of upper oscillating screen plate are equipped with baffle plate；One end of the lower oscillating screen plate is provided with baffle plate, and the other end is to first The inclined downward in direction where elevator；First elevator is located at the side of lower oscillating screen plate, and the first elevator is used for will The molding sand flowed down on lower oscillating screen plate is promoted to cooling cylinder porch, and cooling cylinder is provided with dust shield above exit；Described Two elevators are located at the side in cooling cylinder exit, and the second elevator is defeated for the molding sand that cooling cylinder exit flows down to be promoted to Send and take；The conveyer belt is located at least three casting beds top, used for conveyer belt to be delivered in casting bed in by molding sand, the lower section of casting bed It is provided with sandbox；

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

The cooling cylinder porch is provided with magnetic separator, and the magnetic separator is used to carry out the molding sand entered in cooling cylinder at magnetic separation Reason；

The cooling cylinder bottom surface is connected with three ajutages respectively, and above three ajutage is along cooling cylinder length direction etc. Spacing is distributed and is connected with the air outlet of high pressure positive blower；Cooling water coil is surrounded with the inwall of the cooling cylinder, Being set up at axis line position inside cooling cylinder has helical form cooling water pipe；

The fence top, vibratory sieve top, each casting bed top are provided with dust shield；

The dust shield is connected with cleaner, and the cleaner includes cyclone dust collectors, sack cleaner and removes Dirt blower fan, the dust shield is connected with the entrance of cyclone dust collectors, and the outlet of cyclone dust collectors passes through sack cleaner and removes Dirt blower fan is connected；

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

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

The track that a sand supplying case is slided is equipped between the lower section of each casting bed and fence；

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

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

Technique using above-mentioned lost foam casting wearing piece of the invention casts the technique of scraper wearing piece, step ST1 The Bai Mozhong of preparation, the casting evaporative pattern is scraper evaporative pattern, and the scraper evaporative pattern includes scraper body and scrapes the edge of a knife, scraper Mouth is located at the side of scraper body, front and rear on scraper body to be symmetrically provided with two scraper mounting holes, and the scraper mounting hole is waist Type hole；Scraper mounting hole is formed around one layer of wear-resistant protective layer, and the wear-resistant protective layer is higher by the upper surface of scraper body, and resistance to Mill protective layer uses arc transition with the junction of scraper body；

The outer surface for scraping the edge of a knife includes the first inclined plane, the second inclined plane, the 3rd inclined plane and the 4th inclined plane, institute It is to scrape the upper surface of the edge of a knife to state the first inclined plane, and the first inclined plane is inclined upwardly, and the second inclined plane is connected with the first inclined plane, and Second inclined plane is downward-sloping, and the 4th inclined plane is to scrape the lower surface of the edge of a knife, and the 3rd inclined plane inclines the second inclined plane with the 4th Inclined-plane is connected；

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

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

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

The outer surface in the first use portion includes the inclined plane of lateral lobe piece first, the inclined plane of lateral lobe piece second, lateral lobe piece the Three inclined planes and the inclined plane of lateral lobe piece the 4th, the inclined plane of lateral lobe piece first are the upper surface in the first use portion, lateral lobe piece One inclined plane is downward-sloping, and the inclined plane of lateral lobe piece the 4th is the lower surface in the first use portion, and the inclined plane of lateral lobe piece the 4th dips down Tiltedly, the inclined plane of lateral lobe piece the 3rd is connected with the inclined plane of lateral lobe piece the 4th, and the inclined plane of lateral lobe piece the 3rd is inclined upwardly, lateral lobe piece With the inclined plane of lateral lobe piece first be connected the inclined plane of lateral lobe piece the 3rd by two inclined planes；

The side blade body non-first is provided with loss of weight breach using portion and second using the side in portion；The lateral lobe piece Body is provided with baffle plate, and the baffle plate is higher by the upper surface of side blade body, and baffle plate is oppositely arranged with second using portion；

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

Technique using above-mentioned lost foam casting wearing piece of the invention casts the technique of Leaf wearing piece, step Bai Mozhong prepared by ST1, the casting evaporative pattern is Leaf evaporative pattern, and the Leaf evaporative pattern includes Leaf body and makes With portion, the Leaf body is T-shaped structure, and the rear side of Leaf body is provided with and uses portion, and this is higher by using portion The upper surface of Leaf body, is arc transition using the junction of portion and Leaf body；It is front and rear symmetrical on Leaf body Be provided with two Leaf mounting holes, the Leaf mounting hole be circular port；Leaf mounting hole is formed around one layer of middle period Piece wear-resistant protective layer, the Leaf wear-resistant protective layer is higher by the upper surface of Leaf body, and Leaf wear-resistant protective layer is with The junction of blade body uses arc transition；

Upper surface, the lower surface of the Leaf body portion to inclining therebetween, Leaf body portion upper table Face is α with the angle of lower surface；

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

Two Leaf lightening grooves are symmetrically provided with the Leaf body.

3. beneficial effect

The technical scheme provided using the present invention, compared with prior art, with following remarkable result：

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

1) oscillating screen plate and lower oscillating screen plate are obliquely installed on, after pending molding sand is dropped down onto on oscillating screen plate, in vibration In the presence of slowly moved to direction where the first elevator, while filtered in molding sand moving process, while tile coming, keep away Exempted to influence the problem of 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 is automatically sent at oscillating screen plate overhead gage, is easy to centralized recovery to process；

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

3) in order to improve live working environment, it is to avoid dust pollution, above fence, above vibratory sieve, each casting bed Top is provided with dust shield, to remove the dust in air；

4) cleaner includes cyclone dust collectors, sack cleaner and dedusting fan, and dedusting fan provides suction, dust shield Systemic dust laden air first passes through the dust that cyclone dust collectors remove bulky grain, while avoid bulky grain dust being removed to cloth bag The abrasion of cloth bag, plays a protective role to cloth bag on dirt device；Then short grained dust is removed by sack cleaner, after dedusting Air eventually pass dedusting fan discharge, cleaner uses two-stage dedusting, and dust removing effects are more preferable；

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

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

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

(4) in the present invention in step ST4, with writing brush by all of groove surfaces on casting evaporative pattern and through-hole surfaces brush One layer of 2~3mm thick coating, can slow down the molten iron rate of set of the groove and through hole on casting evaporative pattern so that cast When casting evaporative pattern on groove and through hole molten iron rate of set and casting evaporative pattern on molten iron elsewhere condensation speed Degree keeps synchronous, the internal stress that effectively cast-internal is formed after the shaping of elimination casting.

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

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

Brief description of the drawings

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

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

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

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

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

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

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

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

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

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

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

Figure 12 is the cross section structure diagram in Figure 10 along line D-D；

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 invention.

Label declaration in accompanying drawing：

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

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

23rd, lateral lobe piece evaporative pattern；2301st, first portion is used；23011st, the inclined plane of lateral lobe piece first；23012nd, lateral lobe piece Two inclined planes；23013rd, the inclined plane of lateral lobe piece the 3rd；23014th, the inclined plane of lateral lobe piece the 4th；2302nd, side blade body；2303、 Lateral lobe piece mounting hole；23031st, lateral lobe piece wear-resistant protective layer；2304th, loss of weight breach；2305th, second portion is used；2306th, baffle plate；

33rd, Leaf evaporative pattern；3301st, portion is used；3302nd, Leaf body；3303rd, Leaf mounting hole；33031、 Leaf wear-resistant protective layer；3304th, 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, sand Bed；1-13, sandbox；1-14, vacuum distribution.

Specific embodiment

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

Embodiment 1

With reference to Fig. 1~6 and Figure 13~14, the technique of the lost foam casting scraper wearing piece of the present embodiment, including it is following Step,

Step ST1, prepare white mould；

To being passed through cooling water from top to bottom in mould, the upper mould of mould is opened after after mould cooling, then in mould from Compressed air is passed through on down, white mould is ejected from mould；In the present embodiment, white mould is pushed up from mould using compressed air Go out, the problem of fragile white mould when can avoid artificial modulus improves qualification rate prepared by white mould.

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

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

Casting evaporative pattern 3 and ingate 2 are integrally formed, it is ensured that molten iron can be flowed into successfully by ingate 2 to be cast Part evaporative pattern 3, and without being bonded casting evaporative pattern 3 with ingate 2 by glue, it is time saving and energy saving；Casting evaporative pattern 3 Both sides are symmetrically provided with ingate 2, and the ingate 2 includes drainage block 201 and grafting block 202, drainage block 201 and grafting block 202 Rectangular block is, the width of grafting block 202 is equal with the width of drainage block 201, and drainage block 201 and grafting block 202 are mutually perpendicular to L-shaped structure is collectively formed, drainage block 201 is connected with casting evaporative pattern 3, the thickness of drainage block 201 is the 1/ of the thickness of grafting block 202 4~1/2 (taking 1/4 in specific the present embodiment)；Grafting block 202 is used to be engaged with above-mentioned inserting groove 102.

In order to ensure that grafting block 202 can be tightly secured in inserting groove 102, the width of grafting block 202 is more than grafting 2~the 3mm of width (taking 2mm in specific the present embodiment) of groove 102 so that grafting block 202 is clamp-oned in inserting groove 102, inserting groove 102 Squeezing action to its interior grafting block 202 causes that grafting block 202 is more firm with what inserting groove 102 was fixed.The thickness of grafting block 202 Degree is easy to grafting block 202 to insert with agreeing with completely in inserting groove 102 so that grafting block equal to the depth of inserting groove 102 Space is not left between 202 and inserting groove 102, is conducive to molten iron smooth flow.

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

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

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

In the prior art often by Design of Gate for a small rectangular block is connected on cast model, after casting complete , it is necessary to the ingate coagulum that will be connected on casting knocks out, polishes clean when casting to being molded is cleared up, but due to Ingate coagulum and casting body are common shapings in cast, during often resulting in knockout ingate coagulum, no It is that ingate coagulum leaves one section and is difficult to clean off on casting body, is exactly casting body attached with ingate coagulum junction Near-end point also is struck, not only time-consuming work consuming, and has a strong impact on the quality of casting, increased casting defect rate.In order to overcome Disadvantages mentioned above, makes following improvement in the present embodiment：Ingate 2 includes drainage block 201 and grafting block 202, drainage block 201 and casting Part evaporative pattern 3 is connected, and grafting block 202 is used to be engaged with above-mentioned inserting groove 102, and the thickness of drainage block 201 is the thickness of grafting block 202 The 1/4~1/2 of degree, the thickness of drainage block 201 is smaller in the present embodiment, greatly facilitates the process for knocking out ingate coagulum, That is ingate coagulum is smaller with the segment thickness that casting body is connected, and is easier the knockout from casting body and comes off and do not glue Band casting body part, the part that knockout comes off is more neat, is easy to polishing, and time and labour saving improves the presentation quality of casting；This Ingate 2 is designed as L-shaped in embodiment so that the easy stress of L-shaped structure of ingate coagulum, is easy to knock out operation.

In specific the present embodiment, casting evaporative pattern 3 is scraper evaporative pattern 13, and the scraper evaporative pattern 13 includes scraper body 1302 and the edge of a knife 1301 is scraped, scrape the edge of a knife 1301 positioned at the side of scraper body 1302, it is front and rear on scraper body 1302 symmetrically to set There are two scraper mounting holes 1303, the scraper mounting hole 1303 is waist-shaped hole, for scraper body 1302 being installed by bolt On mixing arm；Scraper mounting hole 1303 is formed around one layer of wear-resistant protective layer 13031, and the wear-resistant protective layer 13031 is higher by 5~the 6mm of upper surface (taking 5mm in specific the present embodiment) of scraper body 1302, and wear-resistant protective layer 13031 and scraper body 1302 junction uses arc transition, and the abrasion for being designed to reduce junction of arc transition strengthens wear-resistant protective layer 13031 using effect.Scraping the outer surface of the edge of a knife 1301 includes that the first inclined plane 13011, the second inclined plane the 13012, the 3rd are inclined The inclined plane 13014 of inclined-plane 13013 and the 4th, the first inclined plane 13011 is the upper surface for scraping the edge of a knife 1301, the first inclined plane 13011 are inclined upwardly, and the first inclined plane 13011 is 30~35 ° (30 ° are taken in specific the present embodiment) with horizontal angle, the Two inclined planes 13012 are connected with the first inclined plane 13011, and the second inclined plane 13012 is downward-sloping, the second inclined plane 13012 It is 50~55 ° (50 ° are taken in specific the present embodiment) with the angle of vertical line；4th inclined plane 13014 is to scrape under the edge of a knife 1301 With the 4th inclined plane 13014 be connected second inclined plane 13012 by surface, the 3rd inclined plane 13013；The edge of a knife is scraped in the present embodiment 1301 outer surface is made up of multiple inclined planes, is scraped the edge of a knife 1301 and can be obviously improved casting using unique texture in the present embodiment The performance and service life of the scraper wearing piece corresponding position produced.Secondly, in order to scraper is resistance to after mitigating casting The weight of part is ground, manufacturing cost is reduced, scraper lightening grooves 1304 are symmetrically provided with the rear and front end of scraper body 1302.

Existing scraper body is designed for plane body, and during concrete-agitating, the stirring between concrete has very Big resistance, has very big deterioration at work, especially at the mounting hole on scraper, can cause the spiral shell in mounting hole Bolt is damaged, in actual engineer applied, tends to cause scraper to install insecure or the accident such as come off from mixing arm hair It is raw, the service life of scraper is reduced, so as to increased the loss of scraper wearing piece.In order to overcome disadvantages mentioned above, the present embodiment In make following improvement：Scraper mounting hole 1303 is formed around one layer of wear-resistant protective layer 13031, the wear-resistant protective layer 13031 It is higher by the upper surface of scraper body 1302 and with certain thickness, significant protective effect is played to scraper mounting hole 1303, When scraper works, after wear-resistant protective layer 13031 is worn loss completely, scraper mounting hole 1303 can just be formed and worn and torn, So design protects scraper mounting hole 1303 and its interior fixing bolt significantly, the service life of scraper is improve, so as to drop The low loss of scraper wearing piece.

Step ST2, the white mould of assembling；

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

Step ST3, prepare coating；

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

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

Step ST4, swabbing；

Groove and through hole on casting evaporative pattern 3 occur following two problems in casting process：(1) casting disappears Groove and through hole on mould 3 are easy to be stained with sand after casting shaping, are not easy to follow-up sand removal operation；(2) because casting disappears The molten iron circulation in cast of groove and through hole on mould 3 is relatively slow, therefore molten iron temperature is relatively low herein during cast so that The rate of set of molten iron is asynchronous with the rate of set of molten iron elsewhere (in synchronization casting evaporative pattern herein during cast The condensation degree of groove and through hole molten iron on 3 with it is inconsistent elsewhere), casting shaping after, easily in cast-internal shape Into larger internal stress, serious even forms crackle in cast(ing) surface, and this problem is always many puzzlement lost foam casting fields The technical barrier in year.Above-mentioned technical barrier is directed in the prior art, and universal resolving ideas are " processing afterwards ", work as cast-internal When forming larger internal stress because of above-mentioned reason, eliminated by follow-up Technology for Heating Processing, but do so increased subsequent thermal The operation for the treatment of, increased manufacturing cost.How to improve the construction technology of certain step before cast or cast, accomplish " thing Preceding prevention ", the technical scheme that correlation is never had in the prior art or the corresponding technology scheme for constituting technical inspiration.

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

Step ST5, dip-coating material；

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

Step ST6, moulding；

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

Step ST7, cast；

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

Step ST8, molding sand are reclaimed；

In step ST8, molding sand recovery is carried out using sand preparing system, sandbox 1-13 is moved on fence 1-1 and mould turnover, casting Part is intercepted by fence 1-1, and pending molding sand is dropped down onto on upper oscillating screen plate 1-2 by the through hole on fence 1-1, with upper vibratory sieve The vibration of plate 1-2, the molding sand of size qualification is fallen on lower oscillating screen plate 1-3 by the through hole on upper oscillating screen plate 1-2, bulky grain Impurity and out-of-size molding sand are left on oscillating screen plate 1-2；Molding sand on lower oscillating screen plate 1-3 is by the first lifting Machine 1-4 is promoted to cooling cylinder 1-7 porch, and carries out magnetic separation treatment in cooling cylinder 1-7 porch, and the molding sand after magnetic separation treatment enters Enter cooling, dedusting in cooling cylinder 1-7, the molding sand after cooling, dedusting passes sequentially through the second elevator 1-10, conveyer belt 1-11 conveying Into each casting bed 1-12, molding sand removal process is completed；

Wherein, sand preparing system include fence 1-1, vibratory sieve, the first elevator 1-4, cooling cylinder 1-7, dust shield 1-9, Second elevator 1-10, conveyer belt 1-11, casting bed 1-12 and sandbox 1-13, the lower section of fence 1-1 set vibratory sieve, the vibratory sieve Including the upper oscillating screen plate 1-2, the lower oscillating screen plate 1-3 that are connected with vibrating motor, upper oscillating screen plate 1-2 and lower oscillating screen plate 1- 3 upper and lower be arranged in parallel；Through hole is evenly equipped with upper oscillating screen plate 1-2, the two ends of upper oscillating screen plate 1-2 are equipped with baffle plate；Lower vibration One end of sieve plate 1-3 is provided with baffle plate, inclined downward from the other end to direction where the first elevator 1-4 so that lower oscillating screen plate 1-3 is 4~5 ° (being 4 ° in specific the present embodiment) with the angle of horizontal plane；In the present embodiment, because upper oscillating screen plate 1-2 is with Oscillating screen plate 1-3's is obliquely installed so that after pending molding sand is dropped down onto on oscillating screen plate 1-2, can be in the presence of vibration Direction where first elevator 1-4 is slowly moved, while filtered in molding sand moving process, while tile coming, it is to avoid because Molding sand gathers immediately below fence 1-1 and influences the problem of oscillating screen plate 1-2 filter efficiencies all the time, and by upper vibratory sieve The large granular impurity that leaves and out-of-size molding sand are automatically sent on oscillating screen plate 1-2 near the after plate 1-2 filterings At one end-stopping plate of one elevator 1-4, it is easy to centralized recovery to process large granular impurity and out-of-size molding sand；Size qualification Molding sand at the uniform velocity delivered on lower oscillating screen plate 1-3 on the first elevator 1-4；Wherein, inventor is by multiple field practice Summarize and find, the angle of lower oscillating screen plate 1-3 and horizontal plane is designed as 4~5 ° of (namely upper oscillating screen plate 1-2 and horizontal planes Angle is 4~5 °), it is ensured that the molding sand on upper oscillating screen plate 1-2 can at the uniform velocity tile, it is ensured that its filter effect, under also causing The molding sand of size qualification at the uniform velocity can be gently moved on the first elevator 1-4 on oscillating screen plate 1-3, with sand in the present embodiment The unit interval sand treating capacity of processing system is adapted.First elevator 1-4 is located at the side of lower oscillating screen plate 1-3, and first carries The machine of liter 1-4 is used to for the molding sand flowed down on lower oscillating screen plate 1-3 to be promoted to cooling cylinder 1-7 porch, and cooling cylinder 1-7 porch sets There is magnetic separator 1-5, magnetic separator 1-5 is used to for the molding sand entered in cooling cylinder 1-7 to carry out magnetic separation treatment, in the present embodiment, treats Treatment molding sand first passes through oscillating screen plate 1-2 and filters out large granular impurity (including bulky grain irony impurity) and out-of-size After molding sand, then magnetic separation treatment is carried out by magnetic separator 1-5, so design significantly reduces the workload of magnetic separator 1-5, is conducive to Improve the treatment effect and treatment effeciency of molding sand.Cooling cylinder 1-7 is provided with dust shield 1-9 above exit, and dust shield 1-9 is not Only play a part of absorbing cooling cylinder 1-7 exits absorption dust laden air, also form local negative in cooling cylinder 1-7 exits Pressure so that cooling cylinder 1-7 porch and exit form pressure difference, and the molding sand of cooling cylinder 1-7 porch is under above-mentioned differential pressure action To being moved in cooling cylinder 1-7.

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

In the present embodiment, cooling cylinder 1-7 primarily serves the function of dust in cooling molding sand and removal molding sand, cooling cylinder 1-7 Bottom surface is connected with three ajutage 1-8 respectively, and above three ajutage 1-8 is along cooling cylinder 1-7 length direction equidistantly distributeds And the air outlet with high pressure positive blower 1-6 is connected；Cooling water coil, cooling cylinder are surrounded with the inwall of cooling cylinder 1-7 Being set up at axis line position inside 1-7 has helical form cooling water pipe.Molding sand is led in cooling cylinder 1-7 by three ajutage 1-8 The gases at high pressure for entering blow afloat, the molding sand for being blown afloat mainly with cooling cylinder 1-7 axis line insides position at set up helical form cool down Water pipe is exchanged heat, meanwhile, molding sand is also carried out with cooling cylinder 1-7 inwalls during blowing afloat around the cooling water coil for setting Heat exchange, molding sand is rapidly cooled by after helical form cooling water pipe and cooling water coil jointly heat exchange, in cooling cylinder 1-7 exits Exported to cooling cylinder 1-7 under local decompression's effect of formation and moved.In the present embodiment, cooling water coil and helical form cooling water pipe Molding sand is trapped among wherein jointly so that molding sand is blown to any direction in cooling cylinder 1-7 and can fully be exchanged heat, and carries significantly The cooling effect of cooling cylinder 1-7 is risen.In the present embodiment, the high pressure that molding sand is passed through in cooling cylinder 1-7 by three ajutage 1-8 Gas blows afloat, and molding sand can not only be made fully to spread and improve its heat transfer effect, while making the dust in molding sand fully be kicked up, has The dust shield 1-9 set beneficial to cooling cylinder 1-7 exits top all siphons away the dust in molding sand.

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

Sand preparing system also includes that vacuum distribution 1-14, vacuum distribution 1-14 are provided with multiple access ports, and this connects Entrance is connected by pipeline with the vacuum orifice on sandbox 1-13；Vacuum distribution 1-14 is connected with vaccum-pumping equipment, and this is taken out very Null device includes vavuum pump, gas tank and water tank；In the present embodiment, the setting of vacuum distribution 1-14 causes a vaccum-pumping equipment Vacuumize process can be carried out to multiple sandbox 1-13 simultaneously, improve the operating efficiency of vaccum-pumping equipment, reduced and be produced into This.

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

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

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

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

Step ST9, casting cleaning；

Step ST10, heat treatment；

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

In the present embodiment, casting is put and vibrates air quenching on a vibration table, and casting can leave shake table during air quenching so that casting Whole outer surface obtain uniform hardening, the quenching problem of non-uniform existed during current wear resistance castings air quenching can be solved；Its In, the uniform through hole in shake table surface forms the air flue of up/down perforation, it is ensured that casting 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, can be obviously improved casting Hardness, after casting is processed through the Technology for Heating Processing in the present embodiment, its HRC hardness is promoted to 60~65, and cast(ing) surface hardness Uniformly, actually used demand can be better adapted to.

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

Embodiment 2

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

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

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

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

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

Embodiment 3

With reference to Fig. 7~9, the technique of the casting lateral lobe piece 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, casting evaporative pattern 3 is lateral lobe piece evaporative pattern 23, the lateral lobe piece evaporative pattern 23 include side blade body 2302, the first use portion 2301 and the second use portion 2305, and first uses portion using portion 2301, second 2305 are located on two adjacent sides of side blade body 2302 respectively, during concrete-agitating, the first use portion 2301 Contacted with side plate, second is contacted using portion 2305 with agitator inwall；Second is higher by side blade body 2302 using portion 2305 Upper surface, the outer wall in the second use portion 2305 is arcwall face, and the design of arcwall face is reduced second during concrete-agitating The resistance being subject to using the outer wall of portion 2305, reduces the abrasion in the second use portion 2305, improves the service life of lateral lobe piece；Side Front and rear in blade body 2302 to be symmetrically provided with two lateral lobe piece mounting holes 2303, the lateral lobe piece mounting hole 2303 is waist-shaped hole, For side blade body 2302 to be installed into fixation by bolt；Lateral lobe piece mounting hole 2303 to be formed around one layer of lateral lobe piece wear-resisting Protective layer 23031, the lateral lobe piece wear-resistant protective layer 23031 is higher by 5~6mm of upper surface (specific this reality of side blade body 2302 Apply and take 5mm in example), and lateral lobe piece wear-resistant protective layer 23031 uses arc transition, circular arc with the junction of side blade body 2302 The abrasion for being designed to reduce junction of transition, strengthens the using effect of wear-resistant protective layer 23031.

The outer surface in the first use portion 2301 includes the first inclined plane of lateral lobe piece 23011, the inclined plane of lateral lobe piece second 23012nd, the inclined plane 23013 of lateral lobe piece the 3rd and the inclined plane 23014 of lateral lobe piece the 4th, the first inclined plane of lateral lobe piece 23011 are the The upper surface in one use portion 2301, lateral lobe piece the first inclined plane 23011 is downward-sloping, and the inclined plane 23014 of lateral lobe piece the 4th is the The lower surface in one use portion 2301, the inclined plane 23014 of lateral lobe piece the 4th is downward-sloping, the inclined plane 23013 of lateral lobe piece the 3rd and side The inclined plane 23014 of blade the 4th is connected, and the inclined plane 23013 of lateral lobe piece the 3rd is inclined upwardly, the inclined plane 23013 of lateral lobe piece the 3rd It is 50~55 ° (50 ° are taken in specific the present embodiment) with horizontal angle；The second inclined plane of lateral lobe piece 23012 is by lateral lobe piece Three inclined planes 23013 are connected with the first inclined plane of lateral lobe piece 23011, and the second inclined plane of lateral lobe piece 23012 is inclined with lateral lobe piece the 3rd The angle on inclined-plane 23013 is 90 °.First is made up of using the outer surface in portion 2301 multiple inclined planes in the present embodiment, using this The first of unique texture can be obviously improved its performance and service life using portion 2301 in embodiment.Secondly, in order to subtract The weight of light casting rear side blade body 2302, reduces manufacturing cost, and in side, blade body 2302 non-first uses portion 2301 and the second loss of weight breach 2304 for being provided with circular arc using the side in portion 2305.In order to the stirring for improving lateral lobe piece is imitated Really, shorten mixing cycle, baffle plate 2306 is provided with side blade body 2302, the baffle plate 2306 is higher by side blade body 2302 Upper surface, and baffle plate 2306 is oppositely arranged with second using portion 2305, the setting of baffle plate 2306 increases during concrete-agitating The amount of agitation of lateral lobe piece is added so that once stirring can drive more concrete to move, and in identical mixing time, mix It is more uniform that solidifying soil is stirred, therefore shortens the mixing cycle of concrete, reduces production cost.

Embodiment 4

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

Embodiment 5

With reference to Figure 10~12, the technique of the casting Leaf wearing piece of the present embodiment, its step and the basic phase of embodiment 1 Together, its difference is：Bai Mozhong prepared by step ST1, casting evaporative pattern 3 is Leaf evaporative pattern 33, and the Leaf disappears Losing mould 33 includes Leaf body 3302 and use portion 3301, and Leaf body 3302 is T-shaped structure, Leaf body 3302 Rear side be provided with use portion 3301, during concrete-agitating, contacted with agitator inwall using portion 3301；This makes The upper surface of Leaf body 3302 is higher by with portion 3301, the use of the junction of portion 3301 and Leaf body 3302 is circular arc mistake Cross, the design of arc transition reduces the resistance being subject to using the outer wall of portion 3301 during concrete-agitating, reduces and uses portion 3301 abrasion, improves the service life of Leaf；It is front and rear on Leaf body 3302 to be symmetrically provided with two Leaf peaces Dress hole 3303, the Leaf mounting hole 3303 is circular port, for Leaf body 3302 to be installed into fixation by bolt；Middle period Piece mounting hole 3303 is formed around one layer of Leaf wear-resistant protective layer 33031, during the Leaf wear-resistant protective layer 33031 is higher by 5~the 6mm of upper surface (taking 5mm in specific the present embodiment) of blade body 3302；And Leaf wear-resistant protective layer 33031 and middle period The junction of piece body 3302 uses arc transition, and the abrasion for being designed to reduce junction of arc transition strengthens Leaf The using effect of wear-resistant protective layer 33031.

Upper surface, the lower surface of the front portion of Leaf body 3302 are to inclining therebetween, and Leaf body 3302 is anterior Upper surface is α=10~11 ° (10 ° are taken in specific the present embodiment) with the angle of lower surface；Using unique texture in the present embodiment Leaf body 3302 can be obviously improved its performance and service life.Secondly, in order to mitigate the middle period after casting The weight of piece body 3302, reduces manufacturing cost, and Leaf body 3302 is designed as into T-shaped structure, middle period in the present embodiment Two Leaf lightening grooves 3304 are symmetrically provided with piece body 3302, are ensureing the structural strength of Leaf body 3302 Under the premise of, alleviate the weight of Leaf body 3302.

During concrete-agitating, the stirring between concrete has very big resistance to existing Leaf, in work In have very big deterioration, especially at the mounting hole on Leaf, can cause that bolt in mounting hole is damaged, it is actual In engineer applied, tend to cause Leaf that insecure or the accident such as directly come off generation is installed, reduce Leaf Service life, so as to increased the loss of wearing piece.In order to overcome disadvantages mentioned above, in the present embodiment：Leaf mounting hole 3303 Be formed around one layer of Leaf wear-resistant protective layer 33031, the Leaf wear-resistant protective layer 33031 is higher by Leaf body 3302 Upper surface and with certain thickness, significant protective effect is played to Leaf mounting hole 3303, when Leaf works, After Leaf wear-resistant protective layer 33031 is worn loss completely, Leaf mounting hole 3303 can just be formed and worn and torn, so set Meter protects Leaf mounting hole 3303 and its interior bolt significantly, improves the service life of Leaf, resistance to so as to reduce Grind the loss of part.

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 exists In：Leaf wear-resistant protective layer 33031 is higher by the upper surface 6mm of Leaf body 3302；The anterior upper table of Leaf body 3302 Face is 11 ° with the angle of lower surface.

Schematical above that the present invention and embodiments thereof are described, the description does not have restricted, institute in accompanying drawing What is shown is also one of embodiments of the present invention, and actual structure is not limited thereto.So, if the common skill of this area Art personnel enlightened by it, in the case where the invention objective is not departed from, is designed and the technical scheme without creative Similar frame mode and embodiment, all should belong to protection scope of the present invention.

Claims

1. a kind of technique of lost foam casting wearing piece, it is characterised in that：Comprise the following steps,

Step ST1, prepare white mould；

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

The foam obtained after prefoam is rushed in mould using compressed air, to the steam that 50~100 DEG C are passed through in mould, hair Bubble obtains Bai Mo；

To being passed through cooling water from top to bottom in mould, the upper mould of mould is opened after after mould cooling, then in mould from lower On be passed through compressed air, white mould is ejected from mould；

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

Step ST2, the white mould of assembling；

Step ST3, prepare coating；

Step ST4, swabbing；

Step ST5, dip-coating material；

Step ST6, moulding；

Step ST7, cast；

Step ST8, molding sand are reclaimed；

Step ST9, casting cleaning；

Step ST10, heat treatment；

Bai Mozhong prepared by step ST1, the cross gate (1) is strip, and cross gate (1) includes cross gate main body (104), should 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 along length Degree direction is also equally spacedly provided with 3~8 inserting grooves (102), and the both sides of the drainage muscle (101) symmetrically offer lightening grooves (103)；

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

The lightening grooves (103) use arc transition with the intersection of inserting groove (102)；The thickness of the drainage block (201) is The 1/4~1/2 of grafting block (202) thickness；

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

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

The both sides of drainage muscle (101) one end are provided with contiguous block, the contiguous block by the side of drainage muscle (101) end with it is horizontal Runner body (104) is connected.

2. the technique of lost foam casting wearing piece according to claim 1, it is characterised in that：In step ST2, by two horizontal strokes Running channel (1) is vertically arranged so that the inserting groove (102) on two cross gates (1) is facing each other, 3~8 casting evaporative patterns (3) Between two cross gates (1), and at least at a distance of 5mm between adjacent casting evaporative pattern (3), casting evaporative pattern (3) both sides Ingate (2) is engaged with the cross gate (1) of respective side respectively, obtains white mould assembly.

3. the technique of lost foam casting wearing piece according to claim 1, it is characterised in that：In step ST3, by fire resisting bone Material, organic binder, anhydrous adhesive, suspending agent, thickening stabilizing agent, defoamer and preservative are well mixed to be applied Material, wherein：Refractory aggregate accounts for the 17~18% of coating gross mass, and refractory aggregate is the mixture of brown alundum powder and silica flour, institute The particle diameter for stating brown alundum powder and silica flour is more than 300 mesh；Organic binder is the mixed of sodium carboxymethylcellulose and white glue with vinyl Compound, the sodium carboxymethylcellulose accounts for the 0.2~0.6% of coating gross mass, and white glue with vinyl accounts for the 3~6% of coating gross mass, institute State the polyvinyl alcohol containing mass percent 20% in white glue with vinyl；Anhydrous adhesive is Ludox, and it is total that the Ludox accounts for coating The 3~8% of quality；Suspending agent is sodium bentonite, and the sodium bentonite accounts for the 1~4% of coating gross mass；Thickening stabilizing agent It is polyacrylamide, the polyacrylamide accounts for the 0.1~0.2% of coating gross mass.

4. the technique of lost foam casting wearing piece according to claim 2, it is characterised in that：

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

In step ST5, prepare white mould assembly, the cross gate (1) that casting evaporative pattern (3) both sides are vertically arranged is respectively by rope Son is bundled in the two side arms of fixed mount (4), and the fixed mount (4) is rectangular frame；Then by fixed mount (4), integrally immersion is applied In material pond, fixed mount (4) drying is taken out；Again by fixed mount (4) integrally immersion coating pond, take out fixed mount (4) and dry again；

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

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

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

5. the technique of lost foam casting wearing piece according to claim 2, it is characterised in that：

In step ST8, molding sand recovery is carried out using sand preparing system, sandbox (1-13) is moved on fence (1-1) and mould turnover, casting Part is intercepted by fence (1-1), and molding sand is dropped down onto on upper oscillating screen plate (1-2) by the through hole on fence (1-1), with upper vibratory sieve The vibration of plate (1-2), the molding sand of size qualification is fallen on lower oscillating screen plate (1-3) by the through hole on upper oscillating screen plate (1-2), Impurity and out-of-size molding sand are left on oscillating screen plate (1-2)；Molding sand on lower oscillating screen plate (1-3) passes through first Elevator (1-4) is promoted to cooling cylinder (1-7) porch, and carries out magnetic separation treatment, magnetic separation treatment in cooling cylinder (1-7) porch Molding sand afterwards enters cooling, dedusting in cooling cylinder (1-7), cooling, the molding sand after dedusting pass sequentially through the second elevator (1-10), Conveyer belt (1-11) is delivered in each casting bed (1-12), completes molding sand removal process；

Wherein, the sand preparing system includes fence (1-1), vibratory sieve, the first elevator (1-4), cooling cylinder (1-7), dust suction Cover (1-9), the second elevator (1-10), conveyer belt (1-11), casting bed (1-12) and sandbox (1-13), the fence (1-1) Lower section sets vibratory sieve, and the vibratory sieve includes the upper oscillating screen plate (1-2), the lower oscillating screen plate (1-3) that are connected with vibrating motor, Upper oscillating screen plate (1-2) and lower oscillating screen plate (1-3) is upper and lower be arranged in parallel；It is evenly equipped with the upper oscillating screen plate (1-2) logical Hole, the two ends of upper oscillating screen plate (1-2) are equipped with baffle plate；One end of the lower oscillating screen plate (1-3) is provided with baffle plate, the other end to The inclined downward in direction where first elevator (1-4)；First elevator (1-4) is located at the one of lower oscillating screen plate (1-3) Side, the first elevator (1-4) is used to for the molding sand flowed down on lower oscillating screen plate (1-3) to be promoted to cooling cylinder (1-7) porch, cold But it is provided with dust shield (1-9) above cylinder (1-7) exit；Second elevator (1-10) exports positioned at cooling cylinder (1-7) The side at place, the second elevator (1-10) is used to for the molding sand that cooling cylinder (1-7) exit flows down to be promoted to conveyer belt (1-11) On；The conveyer belt (1-11) is located at least three casting beds (1-12) top, and conveyer belt (1-11) is used to for molding sand to be delivered to sand In bed (1-12), sandbox (1-13) is provided with below casting bed (1-12)；

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

Cooling cylinder (1-7) porch is provided with magnetic separator (1-5), and the magnetic separator (1-5) is used for will be interior into cooling cylinder (1-7) Molding sand carry out magnetic separation treatment；

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

Fence (1-1) top, vibratory sieve top, each casting bed (1-12) top are provided with dust shield (1-9)；

The dust shield (1-9) is connected with cleaner, and the cleaner includes cyclone dust collectors, sack cleaner and removes Dirt blower fan, the dust shield (1-9) is connected with the entrance of cyclone dust collectors, and the outlet of cyclone dust collectors passes through sack cleaner It is connected with dedusting fan；

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

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

The track that a sand supplying case (1-13) is slided is equipped between the lower section of each casting bed (1-12) and fence (1-1)；

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

6. the technique of lost foam casting wearing piece according to claim 2, it is characterised in that：In step ST10, by casting It is put into heating furnace, by 4.5~5h constant-speed heatings to 945~950 DEG C, is then incubated 2~3h, then be cooled to by 1~2h 860~865 DEG C, air cooling of coming out of the stove, wherein, casting is put during air cooling is vibrated on a vibration table, and in the horizontal direction to shake table drum Wind, the uniform through hole in shake table surface, the height of casting vibration is 15~25mm.