CN1074951C - Roller vacuum sealing moulding technique - Google Patents
Roller vacuum sealing moulding technique Download PDFInfo
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- CN1074951C CN1074951C CN97100233A CN97100233A CN1074951C CN 1074951 C CN1074951 C CN 1074951C CN 97100233 A CN97100233 A CN 97100233A CN 97100233 A CN97100233 A CN 97100233A CN 1074951 C CN1074951 C CN 1074951C
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Abstract
The present invention relates to a process for manufacturing rollers with a vacuum sealed mold, which solves the problem of high production cost cause by that a roller is made by casting of a cold metal mold and the casting has too great effect on the roller so that the cold metal mold needs to be preheated and affects the contraction and demoulding of a grooved roller or a grooved rolling ring. The present invention is characterized in that metallic particles and dry sand are used as molding material; the vacuum seal mold process is used to form a casting mold; matched with an abrasive sleeve, a cold iron ring and a sand core, the casting mold is used for the manufacture of the grooved rollers, flat rollers, the grooved rolling rings and flat rolling rings.
Description
The technical field of the invention is roll manufacturing and vacuum sealed molding.Roll is an expendable parts important in the milling train, and vacuum sealed molding is a kind of physics formative method in the casting industry.According to the shape difference of materials such as rolled metal, roll divides plain-barreled roll and two kinds on the roll that pass is arranged.
In the roll casting, partly with the casting of entity metal cold mould, minority is hung sand with entity metal cold mould to most roll barrels.Purpose with entity metal cold mould is to make roll barrel partly obtain to cast chill, thereby improves the wearability of roll barrel working portion.But because the Quench ability of entity metal cold mould is too strong, be easy to generate crackle, so entity metal cold mould all needs preheating, and stenciling coating, the molding sand of extension one bed thickness of minority, and use is poured into a mould in preheating about 70-100 ℃.
Casting roll needs a large amount of entity metal cold moulds, the minor variations of roller diameter or barrel length, just need to make a cover entity metal cold mould, and the process time of entity metal cold mould is longer, the shared fund of entity metal cold mould is many, the shared area of stacked metal cold mould is also big, and the entity metal cold mould life-span is short.
The current roll majority that pass arranged be the plain-barreled roll with casting be machined to pass (Li Jiyu, " alloy ductile iron roll is the application on the shape rolling mill in the continous way hot rolling ", " foundry engieering ", 1994,4, PP6-8).The disadvantage of this roll is that the casting Quench wearing layer of pass part excises during by the machined pass, thereby pass position hardness is low, wears no resistance, and roll consumption increases, especially the dark person of pass.
Directly the difficult point of casting grooved roll or trough of belt collars is: 1. solve Quench and hinder roll or collars contraction with trough of belt entity metal cold mould and crack; 2. how solve grooved roll or trough of belt collars can take out from entity metal cold mould easily.The former Soviet Union takes the lead in manufacturing experimently casting grooved roll, the research that China casts grooved roll since the fifties in the mid-1930s.The more method of domestic and international application is at present: iron hoop is hung sand to the segmentation entity metal cold mould of unpacking, also have methods such as the tyre of the application chill formula casting mold and the ring type casting mold of living to come the Foundry Production grooved roll, the grooved roll wearability of these method castings is all than being machined to pass high many (Guo Xianjiang, Zhang Lianheng from plain-barreled roll fully, " chilled cast iron is in the application of rectifying on the roller ", " casting ", 1994,4, PP14-17).But those are for solving the measure of casting grooved roll difficult point, make assembling entity metal cold mould troublesome poeration, and are restive.Grooved roll is of a great variety in addition, makes the manufacturing difficulty of entity metal cold mould.So above-mentioned the whole bag of tricks all can't wide popularization and application.
Directly the same Quench ability of entity metal cold mould of casting grooved roll is too strong, is easy to generate crackle, thus also need preheating, stenciling coating, and cast is used under 70-100 ℃ of left and right sides condition.
Vacuum sealed molding is different with traditional formative method, the sand that moulding is used is binder free, moisture and accrete dry sand, the top and bottom of sandbox (or other face of sandbox wall) with the film sealing that falls, vacuumize by in the sandbox, make dry sand that is sealed in the sandbox form casting mold, (A.Wittmoset, The NewTh:rd Generation of Molding Processes, AFS Transations, 1975, PP63-72).Its advantage is:
(1) the casting dimension deviation is little, clear-cut, any surface finish.
(2) owing to moisture-free and binding agent in the molding sand, and be in the state of vacuumizing, therefore be difficult for producing defectives such as pore.
(3) the coating spary is on film and molding sand contact-making surface, and its thickness can not influence the casting dimension deviation.
(4) since save molding sand join sand, mulling, oven dry casting mold, the thin sand of vibration, molding sand does not need binding agent and additives again, can save a large amount of power and raw material.
(5) equipment is simple, and investment cost is less, and operating cost is low few.
The technological difficulties and the key of vacuum sealed molding are:
(1) owing to the restriction that is subjected to the current thin film extension property, during the foundry goods of production geometry more complicated, the selection of casting mold die joint is extremely important.
(2) too slow for preventing poring rate, film roasted by molten metal for a long time or poring rate too fast, cause the molten metal splash, so scaling loss film at a distance is higher to the designing requirement of its running gate system.
(3) since during casting of molten metal film can be to continue to keep the certain vacuum of casting mold by scaling loss, need the coating of certain kind of brushing and thickness.
The object of the invention is: (1) solves the too strong technical problem of entity metal cold mould Quench ability.(2) solve and existingly directly to cast grooved roll or the numerous and diverse operation of trough of belt collars technology, so avoided assembling entity metal cold mould troublesome poeration and problem such as restive.(3) thoroughly solve the problem that area is big, the entity metal cold mould life-span is short that casting roll needs the process time of a large amount of entity metal cold moulds, entity metal cold mould long, fund that entity metal cold mould takies is many, stacking entity metal cold mould takies.The present invention selects for use clipped wire (ball), dry sand to do Modeling Material, forms casting mold with vacuum sealing moulding technique, cooperates sand cover, chill ring and core, produces various plain-barreled rolls or collars, various grooved roll or collars.It is can force rate entity metal cold mould little that the present invention does the Quench ability of casting mold or Quench that dry sand adds the chill ring with clipped wire (ball), it is too strong to have solved entity metal cold mould Quench ability, reduce the tendency that roll cracks, can directly pour into a mould so cancelled the casting mold preheating.The present invention does Modeling Material with clipped wire (ball) and dry sand, uses the vacuum sealed molding method, can duplicate the casting mold of roll or collars easy and conveniently, is particularly useful for duplicating the casting mold of miscellaneous various grooved roll or collars.Mould strength and hardness that vacuum sealed molding forms are very high, and in removing casting mold during vacuum state, casting mold is defeated and dispersed voluntarily, has solved above-mentioned two difficult points of direct casting grooved roll, has obtained easy and simple to handle, the direct casting grooved roll of easy control or the technology of trough of belt collars.The present invention adopts vacuum sealing moulding technique, used sandbox and template box number are seldom, the variation of roller diameter or barrel length, can satisfy by mold thickness or the clipped wire (ball) that changes in the sandbox, solve thoroughly that casting roll needs the process time of a large amount of entity metal cold moulds, entity metal cold mould long, fund that entity metal cold mould takies is many, areas that stacking entity metal cold mould takies are big.Do Modeling Material with clipped wire (ball), the casting mold that forms under vacuum sealing moulding technique replaces entity metal cold mould, perhaps do Modeling Material with dry sand, form casting mold with vacuum sealing moulding technique, by placing the chill ring, replace entity metal cold mould, fundamentally solve short problem of entity metal cold mould life-span.
Fig. 1 of the present invention adds sand cover vacuum sealing moulding technique roll casting mold installation diagram for clipped wire, among the figure: last roll neck of 1-and rising head sand cover; 2-vacuum sealed molding sandbox (vertical-parting); 3-clipped wire (ball); 4-grooved roll or plain-barreled roll body of roll die cavity; Roll neck sand cover under the 5-; 6-vacuum-pumping tube joint; 7-running gate system die cavity; The 8-cup.Fig. 2 adds chill ring vacuum sealing moulding technique roll casting mold installation diagram for dry sand, among the figure: 9-vacuum sealed molding sandbox (vertical-parting); 10-dry sand; 11-grooved roll chill ring; 12-grooved roll or plain-barreled roll body of roll casting mold die cavity; 13-vacuum-pumping tube joint; 14-running gate system die cavity; 15-plain-barreled roll chill ring; The 16-cup.Fig. 3 is a body of roll clipped wire vacuum sealing moulding technique roll casting mold installation diagram, among the figure: last roll neck of 17-and rising head sandbox; 18-clay sand mold; Last roll neck of 19-and rising head die cavity; 20-vacuum sealed molding sandbox (vertical-parting); 21-vacuum-pumping tube joint; 22-clipped wire (ball); 23-grooved roll or plain-barreled roll body of roll casting mold die cavity; Roll neck and running gate system sandbox under the 24-; 25-clay sand mold; Roll neck die cavity under the 26-; 27-running gate system die cavity; 28-sprue sandbox; 29-clay sand mold; 30-sprue die cavity; The 31-cup.Fig. 4 is clipped wire and the sub-vacuum sealing moulding technique roll of dry sand casting mold installation diagram, among the figure: last roll neck of 32-and rising head die cavity; 33-vacuum sealed molding sandbox (vertical-parting); 34-dry sand; 35-clipped wire (ball); 36-grooved roll or plain-barreled roll body of roll casting mold die cavity; 37-dry sand; Roll neck die cavity under the 38-; 39-vacuum-pumping tube joint; 40-running gate system die cavity; The 41-cup.Fig. 5 is a clipped wire vacuum sealing moulding technique roll collars casting mold installation diagram, among the figure: 42-rising head and cup sandbox; 43-clay sand mold; 44-rising head die cavity; 45-vacuum sealed molding sandbox (vertical-parting); 46-trough of belt collars or plain-barreled roll collars casting mold die cavity; 47-vacuum-pumping tube joint; The 48-core; 49-clipped wire (ball); 50-running gate system die cavity; 51-cup die cavity.Fig. 6 adds chill ring vacuum sealing moulding technique roll collars casting mold installation diagram for dry sand, among the figure: 52-vacuum sealed molding sandbox (vertical-parting); 53-dry sand; 54-trough of belt collars chill ring; 55-trough of belt collars or plain-barreled roll collars casting mold die cavity; The 56-core; 57-vacuum-pumping tube joint; 58-running gate system die cavity; 59-plain-barreled roll collars chill ring; The 60-rising head; The 61-cup.
Technical scheme of the present invention is to select for use clipped wire (ball) or dry sand to do Modeling Material; model is placed on the template case; the heating film; the template case vacuumizes; the film of heating is covered on the model; the spary fireproof coating; put the vacuum sealed molding sandbox on the template case; add clipped wire or dry sand limit microseism in the bumper top; after having added clipped wire or dry sand; bumper stops vibrations; the film covering is added clipped wire or dry sand rim of the mouth, and sandbox vacuumizes moulding, and the template case is turned off vacuum; molding is promptly finished a vacuum sealing moulding technique and is made casting mold; change a model and sandbox and make other casting mold, correspondingly place the sand cover as required with same step; chill ring (the chill ring also can be placed on the model of overlay film before adding dry sand, is made in the casting mold) or core; with the casting mold of fastening formation roll or collars after two casees mould assembling of casting mold of vacuum sealed molding, be used to produce roll or collars then.Casting of molten metal when certain thickness is solidified on roll foundry goods top layer, is removed vacuum state in the vacuum sealed molding casting mold, but solidifies fully and be cooled to shakeout temperature when the roll foundry goods, and shake out takes out the roll foundry goods.
Fig. 1 of the present invention adds sand cover roller vacuum sealing moulding technique for clipped wire, the modelling that moulding is used is shaped as grooved roll or plain-barreled roll casting mold die cavity, the running gate system die cavity, last roll neck and rising head sand block set die cavity, following roll neck sand block set die cavity, select for use clipped wire (ball) (3) to do Modeling Material, vacuum sealed molding sandbox (2) with vertical-parting, two grooved rolls or plain-barreled roll casting mold die cavity (4) about making with vacuum sealing moulding technique, running gate system die cavity (7), last roll neck and rising head sand cover (1) seat die cavity, following roll neck sand cover (5) seat die cavity, select for use the organic or inorganic binding agent to make binding agent, make of common moulding or core-making process and go up roll neck and rising head sand cover (1), following roll neck sand cover (5) and cup.Laying roll neck and rising head sand cover (1) and following roll neck sand cover (5) on the casting mold of vacuum sealed molding then, about fastening after the two type mould assembling, and place cup (8).
Fig. 2 of the present invention adds chill looping mill rolling roller vacuum sealing moulding technique for dry sand, the modelling that moulding is used is shaped as grooved roll or plain-barreled roll casting mold die cavity, the running gate system die cavity, grooved roll chill ring seat or plain-barreled roll chill ring seat, select for use dry sand (10) to do Modeling Material, vacuum sealed molding sandbox (9) with vertical-parting, two grooved rolls or plain-barreled roll casting mold die cavity (12) about making with vacuum sealing moulding technique, running gate system die cavity (14), grooved roll chill ring seat or plain-barreled roll chill ring seat, on the casting mold of vacuum sealed molding, lay grooved roll chill ring (11) or plain-barreled roll chill ring (15) then, about fastening after the two type mould assembling, and place cup (16).
Fig. 3 of the present invention is a body of roll clipped wire vacuum sealing moulding technique, the modelling that body of roll moulding is used is shaped as grooved roll or plain-barreled roll casting mold die cavity, select for use clipped wire (ball) (22) to do Modeling Material, with the vacuum sealed molding sandbox (20) of vertical-parting, two grooved roll bodies of roll or plain-barreled roll body of roll casting mold die cavity (23) about making with vacuum sealing moulding technique.Select for use the organic or inorganic binding agent to make binding agent, with common formative technology manufacturing: go up roll neck and rising head die cavity (19), roll neck (26), ingate running gate system die cavity (27), sprue running gate system die cavity (30) and cup (31) down.Fastening after two casees mould assembling about the vacuum sealed casting mold then, press fastening casting mold, upward roll neck and rising head die cavity casting mold, sprue running gate system die cavity casting mold and the mould assembling of cup order after two casees mould assembling about roll neck and ingate running gate system casting mold, vacuum sealed molding.
Fig. 4 of the present invention is the sub-vacuum sealed molding roller technology of clipped wire and dry sand, the modelling that moulding is used is shaped as grooved roll or plain-barreled roll casting mold die cavity and running gate system die cavity, vacuum sealed molding sandbox (33) with vertical-parting, use vacuum sealing moulding technique, select for use dry sand (34) and clipped wire (ball) (35) to do Modeling Material, elder generation's filling dry sand makes it highly just in time bury the model of roll neck down during moulding, form roll neck (38) and part running gate system die cavity (40) down, added metal grain (ball) makes it highly just in time bury body of roll model then, form roller strap grooved roller or plain-barreled roll body of roll casting mold die cavity (36) and part running gate system die cavity (40), last filling dry sand makes it highly just in time bury top roll eck mould type, roll neck and rising head die cavity (32) and part running gate system die cavity (40) in the formation.Fastening after two casees mould assembling about the vacuum sealed casting mold then, place cup (41) again.
Fig. 5 of the present invention is a clipped wire vacuum sealed molding roll collars technology, the modelling that moulding is used is shaped as trough of belt collars or plain-barreled roll collars casting mold die cavity, core seat die cavity and running gate system die cavity, select for use clipped wire (ball) (49) to do Modeling Material, with the vacuum sealed molding sandbox (45) of vertical-parting, two trough of belt collars or plain-barreled roll collars casting mold die cavity (46), running gate system die cavity (50) and core seat (48) about making with vacuum sealing moulding technique.Select for use the organic or inorganic binding agent to make binding agent, make core (48), rising head die cavity (44) and cup die cavity (51) with common moulding or core-making process.Fastening after two casees mould assembling about the casting mold of vacuum sealed molding then, place core (48), rising head die cavity and cup die cavity sandbox (42).
Fig. 6 of the present invention adds chill ring vacuum sealed molding roll collars technology for dry sand, the modelling that moulding is used is shaped as trough of belt collars or plain-barreled roll collars casting mold die cavity, core seat die cavity, trough of belt collars chill ring seat or plain-barreled roll collars chill ring seat and running gate system die cavity, select for use dry sand (53) to do Modeling Material, with the vacuum sealed molding sandbox (52) of vertical-parting, two trough of belt collars or plain-barreled roll collars casting mold die cavity (55) about making with vacuum sealing moulding technique, running gate system die cavity (58), core seat die cavity (56), trough of belt collars chill ring seat (54) or plain-barreled roll collars chill ring seat (59) and running gate system die cavity (58).Select for use the organic or inorganic binding agent to make binding agent, make core (56) and cup die cavity (61) with common moulding or core-making process.With fastening after two casees mould assembling about the casting mold of vacuum sealed molding, place core (56) and cup die cavity sandbox (61) then.
Modeling Material of the present invention is selected the clipped wire (ball) of diameter of phi 0.08-0.8mm for use, as steel grit (ball), abrasive grit (ball), shot copper (ball), aluminum shot (ball) and alloy material grain (ball) thereof.Select for use dry sand of diameter of phi 0.074-0.3mm to do Modeling Material, as quartz sand, chromite sand, zircon sand, magnesia, 70 sand, olivine sand.The chill ring is selected steel, iron, copper, aluminium and alloy material thereof and graphite material for use, and each chill ring is divided into the 2-8 piece, and generally each is divided into 2, and two semi-rings are formed a ring.At thick zirconium English powder, silica flour, chromite powder or the graphite fireproof coating of chill ring spray brush 1-3mm.
The present invention selects the thick ethylene-vinyl acetate EVA film of 0.05-1.5mm (being called for short EVA) for use, polyethylene film (being called for short PE), polypropylene film (being called for short PP), polyvinyl chloride film (being called for short PVC), polyvinyl alcohol film (being called for short PVA), polystyrene film (being called for short PS).The heating film is made soften film to 60-150 ℃ and is covered roll or collars model, and the baffle plate case vacuumizes＜0.05MPa.The fast dried fireproof coating of spary 1-3mm is thick on film zirconium English powder, silica flour, chromite powder or graphite.
The present invention behind casting of molten metal, when roll foundry goods top layer concreting thickness greater than 5mm, can remove vacuum state in the vacuum sealed molding casting mold, when the roll foundry goods solidified fully and be cooled to less than 700 ℃, shake out took out the roll foundry goods.
The present invention is used to cast grooved roll, plain-barreled roll, trough of belt collars, plain-barreled roll collars.
Advantage of the present invention:
(1) can cast grooved roll or trough of belt collars: do Modeling Material with clipped wire (ball), form casting mold with vacuum sealing moulding technique, the intensity of casting mold, hardness are very high, can satisfy Quench grooved roll or trough of belt collars working face part again.Perhaps do Modeling Material with dry sand, form casting mold with vacuum sealing moulding technique, the intensity of casting mold, hardness are very high, place the chill ring, also can satisfy Quench grooved roll or trough of belt collars working face part.When certain thickness is solidified on roll or collars foundry goods top layer, just can remove vacuum state in the vacuum sealed molding casting mold, clipped wire (ball) or dry sand are defeated and dispersed voluntarily, casting mold loses intensity and hardness, when but roll or collars foundry goods solidify fully and be cooled to shakeout temperature, shake out takes out roll or collars foundry goods.Two difficult points that better and easily solved casting grooved roll or trough of belt collars are closed, and promptly 1. solve Quench and hinder roll or collars contraction with the trough of belt casting mold and crack; 2. how solve grooved roll or trough of belt collars can take out from casting mold easily.
(2) save a large amount of entity metal cold moulds: casting roll needs a large amount of entity metal cold moulds, and the minor variations of roller diameter or barrel length just needs to make a cover entity metal cold mould.This makes that the process time of entity metal cold mould is longer, and the shared fund of entity metal cold mould is many, and it is also big to stack the shared area of entity metal cold mould.And the employing vacuum sealing moulding technique, then sandbox and template case frock can be seldom, the variation of roller diameter or barrel length is satisfied by mold thickness or the metal ball (particle) that changes in the sandbox, as long as every kind of roll or collars are made a model that is used to duplicate casting mold.
(3) solve the too strong problem of entity metal cold mould Quench ability: clipped wire (ball) is done Modeling Material and is substituted entity metal cold mould, and its Quench ability is moderate.Or do Modeling Material with dry sand, and place a thin chill ring, its Quench ability is also moderate.Solve the too strong problem of entity metal cold mould Quench ability, reduced the crackle tendency of roll or collars.
(4) energy savings: since the Quench ability of entity metal cold mould too can, be easy to generate crackle, thus need preheating entity metal cold mould, and stenciling coating, cast is used under 70-100 ℃ of left and right sides condition then, this needs big heating furnace, consumes a large amount of energy.Also need heated mold with roll neck and rising head die cavity, following roll neck and running gate system die cavity, running gate system die cavity in the manufacturing of common clay sand technology, this also needs big heating furnace, consumes a large amount of energy.
(5) solve short problem of entity metal cold mould life-span: the life-span of roll entity metal cold mould is generally 1-20 time when producing casting roll.And do Modeling Material with clipped wire (ball), the casting mold that forms under vacuum sealing moulding technique replaces entity metal cold mould, fundamentally solves short problem of entity metal cold mould life-span, and the above clipped wire (ball) of 80-95% can return repeated use.Perhaps do Modeling Material with dry sand, form casting mold with vacuum sealing moulding technique,, replace entity metal cold mould by placing the chill ring, fundamentally solve short problem of entity metal cold mould life-span, and above dry sand of 90-95% can return repeated use.Requirement to the chill ring is lower than entity metal cold mould, can repeatedly count use, and cost is lower than entity metal cold mould.
Figure of description explanation of the present invention: Fig. 1 adds sand cover vacuum sealing moulding technique roll casting mold installation diagram for clipped wire, Fig. 2 adds chill ring vacuum sealing moulding technique roll casting mold installation diagram for dry sand, Fig. 3 is a body of roll clipped wire vacuum sealing moulding technique roll casting mold installation diagram, Fig. 4 is clipped wire and the sub-vacuum sealing moulding technique roll of dry sand casting mold installation diagram, Fig. 5 is a clipped wire vacuum sealing moulding technique roll collars casting mold installation diagram, and Fig. 6 adds chill ring vacuum sealing moulding technique roll collars casting mold installation diagram for dry sand.
Clipped wire of the present invention adds sand cover vacuum sealed molding roller technology embodiment:
(1) roll casting dimension: go up roll neck and rising head diameter of phi 145mm, long 500mm, roll barrel diameter of phi 280mm, long 600mm, 4 wide 100mm, the ladder-type trough of dark 80mm, following roll neck diameter of phi 145mm, long 260mm.
(2) roll material: indefinite chill alloy nodular cast iron.
(3) modelling used of moulding be shaped as grooved roll casting mold die cavity, running gate system die cavity, go up roll neck and rising head sand block set die cavity, roll neck sand block set die cavity down,
(4) select for use the abrasive grit (ball) of the about Φ 0.5mm of diameter to do Modeling Material.
(5) sand is applied mechanically resin sand and is made sand cover thickness 50mm.
(6) select the thick eva film of about 0.2mm for use, be heated to 110 ℃ and make soften film covering roll model, the baffle plate case vacuumizes＜0.05MPa.
(7) spary graphite quick drying paint on film, THICKNESS CONTROL is at about 1mm.
(8) select the vacuum sealed molding sandbox of the vertical-parting that the ZL94211986.1 patented technology makes for use.
(9) add clipped wire (ball) limit microseism in the bumper top, after having added clipped wire (ball), bumper stops vibrations, the film covering is added clipped wire (ball) mouth, sandbox vacuumizes moulding＜0.05MPa, the template case is turned off vacuum, and molding is promptly finished a vacuum sealing moulding technique and made casting mold, changes a model and sandbox and makes other casting mold with same step.
(10),, and place cup then with fastening after two casees mould assembling about the casting mold of vacuum sealed molding then laying roll neck and rising head sand cover and following roll neck sand cover on the casting mold of vacuum sealed molding.
(11) behind the casting of molten metal, about 10mm thickness is solidified on control roll foundry goods top layer, removes vacuum state in the vacuum sealed molding casting mold.
(12) control roll foundry goods safety is solidified and is cooled to about 400 ℃, and shake out takes out the roll foundry goods.
Dry sand of the present invention adds chill ring vacuum sealed molding roller technology embodiment:
(1) roll casting dimension: go up roll neck and rising head diameter of phi 145mm, long 500mm, roll barrel diameter of phi 280mm, long 600mm, 4 wide 100mm, the ladder-type trough of dark 80mm, following roll neck diameter of phi 145mm, long 260mm.
(2) roll material: indefinite chill alloy nodular cast iron.
(3) modelling used of moulding is shaped as grooved roll casting mold die cavity, running gate system die cavity, grooved roll chill ring seat.
(4) select for use the dried quartz sand of the about Φ 0.105-0.21mm of diameter to do Modeling Material.
(5) select for use No. 45 steel to do the chill ring, each chill ring is divided into 2, two semi-rings are formed a ring, shared 4 rings.And at the thick graphite fireproof coating of the chill ring spray about 1mm of brush.
(6) select the thick eva film of about 0.2mm for use, be heated to 110 ℃ and make soften film covering roll model, the baffle plate case vacuumizes＜0.05MPa.
(7) spary graphite quick drying paint on film, THICKNESS CONTROL is at about 1mm.
(8) select the vacuum sealed molding sandbox of the vertical-parting that the ZL94211986.1 patented technology makes for use.
(9) add the limit microseism of dried quartz sand in the bumper top, after having added dried quartz sand, bumper stops vibrations, the film covering is added dried quartz sand mouth, sandbox vacuumizes moulding＜0.05MPa, the template case is turned off vacuum, and molding is promptly finished a vacuum sealing moulding technique and made casting mold, changes a model and sandbox and makes other casting mold with same step.
(10) on the casting mold of vacuum sealed molding, lay the chill ring then,, and place cup then with fastening after two casees mould assembling about the casting mold of vacuum sealed molding.
(11) behind the casting of molten metal, about 10mm thickness is solidified on control roll foundry goods top layer, removes vacuum state in the vacuum sealed molding casting mold.
(12) control roll foundry goods solidifies fully and is cooled to about 400 ℃, and shake out takes out the roll foundry goods.
The sub-vacuum sealed molding roller technology of clipped wire of the present invention and dry sand embodiment:
(1) roll casting dimension: go up roll neck and rising head diameter of phi 145mm, long 500mm, roll barrel diameter of phi 280mm, long 600mm, 4 wide 100mm, the ladder-type trough of dark 80mm, following roll neck diameter of phi 145mm, long 260mm.
(2) roll material: alloy cast steel.
(3) modelling used of moulding is shaped as grooved roll casting mold die cavity and running gate system die cavity.
(4) select for use the steel grit (ball) of the about Φ 0.5mm of diameter to do Modeling Material.
(5) select for use the dried magnesia of the about Φ 0.105-0.21mm of diameter to do Modeling Material.
(6) select the thick eva film of about 0.2mm for use, be heated to 110 ℃ and make soften film covering roll model, the baffle plate case vacuumizes＜0.05MPa.
(7) spary zirconium English powder quick drying paint, THICKNESS CONTROL is at about 2mm.
(8) select the vacuum sealed molding sandbox of the vertical-parting that the ZL94211986.1 patented technology makes for use.
(9) add clipped wire (ball) and the limit microseism of dried quartz sand in the bumper top, after having added clipped wire (ball) and dried quartz sand, bumper stops vibrations, film is covered charge door, sandbox vacuumizes moulding＜0.05MPa, the template case is turned off vacuum, and molding is promptly finished a vacuum sealing moulding technique and made casting mold, changes a model and sandbox and makes other casting mold with same step.Charging sequence elder generation filling dry sand makes it highly just in time bury lower roll eck mould type during moulding, form roll neck and part running gate system die cavity down, added metal grain (ball) makes it highly just in time bury body of roll model then, form roller strap grooved roller or plain-barreled roll body of roll casting mold die cavity and part running gate system die cavity, last filling dry sand makes it highly just in time bury top roll eck mould type, roll neck and rising head die cavity and part running gate system die cavity in the formation.
(10), and place cup then with fastening after two casees mould assembling about the casting mold of vacuum sealed molding.
(11) behind the casting of molten metal, about 10mm thickness is solidified on control roll foundry goods top layer, removes vacuum state in the vacuum sealed molding casting mold.
(12) control roll foundry goods solidifies fully and is cooled to about 500 ℃, and shake out takes out the roll foundry goods.
Clipped wire vacuum sealed molding roll collars process implementing example of the present invention:
(1) roll collars casting dimension: collars external diameter Φ 280mm, internal diameter Φ 120mm, long 600mm, 4 wide 100mm, the ladder-type trough of dark 40mm.
(2) roll collars material: alloy cast steel.
(3) modelling used of moulding is shaped as grooved roll ring casting mold die cavity, core seat die cavity and running gate system die cavity.
(4) select for use the steel grit (ball) of the about Φ 0.5mm of diameter to do Modeling Material.
(5) select the thick eva film of about 0.2mm for use, be heated to 110 ℃ and make soften film covering roll model, the baffle plate case vacuumizes＜0.05MPa.
(6) spary zirconium English powder quick drying paint on film, THICKNESS CONTROL is at about 2mm.
(7) core is made with resin sand, and the spary zircon flour coating, and THICKNESS CONTROL is at about 1mm.
(8) select the vacuum sealed molding sandbox of the vertical-parting that the ZL94211986.1 patented technology makes for use.
(9) add clipped wire (ball) limit microseism in the bumper top, after having added clipped wire (ball), bumper stops vibrations, film is covered charge door, sandbox vacuumizes moulding＜0.05MPa, the template case is turned off vacuum, and molding is promptly finished a vacuum sealing moulding technique and made casting mold, changes a model and sandbox and makes other casting mold with same step.
(10) fastening after two casees mould assembling about the casting mold of vacuum sealed molding then, place core, rising head die cavity and cup die cavity sandbox.
(11) behind the casting of molten metal, about 10mm thickness is solidified on control roll casting collars foundry goods top layer, removes vacuum state in the vacuum sealed molding casting mold.
(12) control roll collars foundry goods solidifies fully and is cooled to about 500 ℃, and shake out takes out the roll foundry goods.
Claims (10)
1; a kind of roller vacuum sealing moulding technique; it is characterized in that doing Modeling Material with clipped wire or dry sand; model is placed on the template case; the heating film; the template case vacuumizes; the film of heating is covered on the model; the spary fireproof coating; put the vacuum sealed molding sandbox on the template case; add clipped wire or dry sand limit microseism in the bumper top; after having added clipped wire or dry sand; bumper stops vibrations; the film covering is added clipped wire or dry sand rim of the mouth; sandbox vacuumizes moulding; the template case is turned off vacuum; molding is promptly finished a vacuum sealing moulding technique and is made casting mold; change a model and sandbox and make other casting mold with same step; fastening after two casees mould assembling of casting mold with vacuum sealed molding then, correspondingly place the sand cover as required; chill ring or core, the casting mold of formation roll or collars; be used to produce roll or collars; casting of molten metal when certain thickness is solidified on roll foundry goods top layer, is removed vacuum state in the vacuum sealed molding casting mold; when but the roll foundry goods solidifies fully and is cooled to shakeout temperature, shake out takes out the roll foundry goods.
2, a kind of roller vacuum sealing moulding technique according to claim 1, it is characterized in that selecting for use clipped wire to do Modeling Material, vacuum sealed molding sandbox with vertical-parting, two roll casting mold die cavities, running gate systems about making with vacuum sealing moulding technique, go up roll neck and rising head sand block set, roll neck sand block set die cavity down, make roll neck and rising head sand cover, following roll neck sand cover and cup, laying roll neck and rising head sand cover and following roll neck sand cover on the casting mold then, about fastening after the two type mould assembling, and place cup.
3, a kind of roller vacuum sealing moulding technique according to claim 1, it is characterized in that selecting for use dry sand to do Modeling Material, vacuum sealed molding sandbox with vertical-parting, two roll casting mold die cavities, running gate system, chill ring seat die cavity about making with vacuum sealing moulding technique, on casting mold, lay band chill ring, about fastening after the two type mould assembling, and place cup.
4, a kind of roller vacuum sealing moulding technique according to claim 1 is characterized in that selecting for use clipped wire to do Modeling Material, two roll barrel casting mold die cavities about making with vacuum sealing moulding technique.
5, a kind of roller vacuum sealing moulding technique according to claim 1, it is characterized in that vacuum sealed molding sandbox with vertical-parting, use vacuum sealing moulding technique, select for use dry sand and clipped wire to do Modeling Material, elder generation's filling dry sand makes it highly just in time bury lower roll eck mould type during moulding, the added metal grain makes it highly just in time bury body of roll model then, and last filling dry sand makes it highly just in time bury top roll eck mould type.
6, a kind of roller vacuum sealing moulding technique according to claim 1, it is characterized in that selecting for use clipped wire to do Modeling Material, with the vacuum sealed molding sandbox of vertical-parting, with two collars casting mold die cavities, running gate system die cavity and core seats about the vacuum sealing moulding technique manufacturing.
7, a kind of roller vacuum sealing moulding technique according to claim 1, it is characterized in that selecting for use dry sand to do Modeling Material, with the vacuum sealed molding sandbox of vertical-parting, two collars ring casting mold die cavities, running gate system die cavity, core seat die cavity, collars chill ring seat about making with vacuum sealing moulding technique.
8, a kind of roller vacuum sealing moulding technique according to claim 1, it is characterized in that selecting for use the clipped wire of diameter phi 0.08-0.8mm, as steel grit, abrasive grit, the copper particle, aluminum shot, and alloy material grain, select for use dry sand of diameter phi 0.074-0.3mm to do Modeling Material, as quartz sand, chromite sand, zircon sand, magnesia, 70 sand, olivine sand, the chill ring is selected steel for use, iron, copper, aluminium, and alloy material or graphite material, each chill ring is divided into the 2-8 piece, generally each is divided into 2, two semi-rings are formed a ring, at the thick zirconium English powder of chill ring spray brush 1-3mm, silica flour, chromite powder or graphite fireproof coating.
9, a kind of roller vacuum sealing moulding technique according to claim 1, it is characterized in that the ethylene-vinyl acetate EVA hot-stretch film of selecting for use 0.05-1.5mm thick, polyethylene film, polypropylene film, polyvinyl chloride film, polyvinyl alcohol film, polystyrene film, the heating film is made soften film to 60-150 ℃ and is covered roll or collars model, the baffle plate case vacuumizes＜0.05Mpa, the fast dried fireproof coating of spary 1-3mm is thick on film zirconium English powder, silica flour, chromite powder or graphite.
10, a kind of roller vacuum sealing moulding technique according to claim 1, it is characterized in that behind casting of molten metal, when roll foundry goods top layer concreting thickness greater than 5mm, can remove vacuum state in the vacuum sealed molding casting mold, when the roll foundry goods solidified fully and be cooled to less than 700 ℃, shake out took out the roll foundry goods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97100233A CN1074951C (en) | 1997-01-10 | 1997-01-10 | Roller vacuum sealing moulding technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97100233A CN1074951C (en) | 1997-01-10 | 1997-01-10 | Roller vacuum sealing moulding technique |
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| Publication Number | Publication Date |
|---|---|
| CN1187397A CN1187397A (en) | 1998-07-15 |
| CN1074951C true CN1074951C (en) | 2001-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97100233A Expired - Fee Related CN1074951C (en) | 1997-01-10 | 1997-01-10 | Roller vacuum sealing moulding technique |
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| Country | Link |
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| CN (1) | CN1074951C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014048066A1 (en) * | 2012-09-27 | 2014-04-03 | He Bingxiang | New pouring process for a core/mold package of automobile engine castings |
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| CN1302873C (en) * | 2002-09-09 | 2007-03-07 | 吉林大学 | Near finished shape sections roller casting method |
| CN1305598C (en) * | 2005-06-07 | 2007-03-21 | 如皋市超达模具配套有限公司 | Vacuum negative pressure casting process of foam die casting piece |
| CN101823122A (en) * | 2010-03-24 | 2010-09-08 | 河南省前卫实业有限公司 | Negative-pressure molding process of casting refractory material product |
| CN102000763A (en) * | 2010-10-29 | 2011-04-06 | 定州东方铸造有限公司 | Vacuum sealed casting method for ductile iron hub of wind driven generator |
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| CN109290518B (en) * | 2017-07-25 | 2020-09-08 | 郑州为新科技有限公司 | V-method vertical modeling process and casting process |
| CN111158412B (en) * | 2020-03-25 | 2021-04-27 | 湖南飞沃新能源科技股份有限公司 | Bar-shaped object heating device |
| CN112893779B (en) * | 2021-01-11 | 2022-09-23 | 江苏东冶轧辊有限公司 | Sand-free molding method for roller |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048513A (en) * | 1989-07-04 | 1991-01-16 | 首都钢铁公司 | The method of aluminium ring forming casting grooved roll |
| CN1087562A (en) * | 1993-12-03 | 1994-06-08 | 合肥钢铁公司 | Produce the method and the special-purpose metal mold thereof of cast steel roll |
-
1997
- 1997-01-10 CN CN97100233A patent/CN1074951C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048513A (en) * | 1989-07-04 | 1991-01-16 | 首都钢铁公司 | The method of aluminium ring forming casting grooved roll |
| CN1087562A (en) * | 1993-12-03 | 1994-06-08 | 合肥钢铁公司 | Produce the method and the special-purpose metal mold thereof of cast steel roll |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014048066A1 (en) * | 2012-09-27 | 2014-04-03 | He Bingxiang | New pouring process for a core/mold package of automobile engine castings |
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|---|---|
| CN1187397A (en) | 1998-07-15 |
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