CN107983913B - The precision pouring technique of U-shaped magnesium alloy member - Google Patents
The precision pouring technique of U-shaped magnesium alloy member Download PDFInfo
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- CN107983913B CN107983913B CN201711170948.1A CN201711170948A CN107983913B CN 107983913 B CN107983913 B CN 107983913B CN 201711170948 A CN201711170948 A CN 201711170948A CN 107983913 B CN107983913 B CN 107983913B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
- B22C15/20—Compacting by centrifugal forces only, e.g. in sand slingers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
- B22C9/043—Removing the consumable pattern
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
- B22D1/002—Treatment with gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
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- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a kind of precision pouring techniques of U-shaped magnesium alloy member, in turn include the following steps: (1) making shape mold and core mould；(2) soluble core is made by core mould；(3) shape mold clamping；(4) to cavity injection mould material；(5) upper and lower mould separates, and takes out model；(6) U-shaped workpiece wax-pattern is obtained after core dissolution；(7) U-shaped workpiece wax-pattern and casting component are assembled into casting wax-pattern；(8) brushing fire resisting starch adhesive after wax-pattern degreasing forms fire resisting surface layer after solidification；(9) brushing fireproof coating and stucco are continued in fire resisting surface layer periphery, such multilayer forms shell after solidification；(10) shell dewaxes；(11) Baking；(12) shell is placed on moulding in sandbox；(13) shell is placed on above the sealing cover of holding furnace together with sandbox, the cast gate of shell is docked with the stalk at sealing cover center downwards；(14) after magnesium liquid refining degasification, type, boosting, pressure maintaining and release are filled to shell, cooling obtains U-shaped magnesium alloy member.The pouring technology fills type quick and stable, and the certified product rate of product is high.
Description
Technical field
The present invention relates to a kind of casting of magnesium alloy member, in particular to a kind of precision pouring technique of U-shaped magnesium alloy member belongs to
In metal casting technique field.
Background technique
Investment precision casting technology, which refers to, is made into model with wax, in fire proofed woods such as its appearance wrapped multiple clay, binders
Material, heating are melted out wax, to obtain the ghost formed by refractory material, then ghost will be poured into after metal molten, to gold
Refractory material is broken into pieces after belonging to cooling to obtain metal parts, the technique of this processing metal is just named precision-investment casting, also referred to as
Model casting or lost-wax casting.
The total end of U-shaped magnesium alloy member is connected, and two-arm extends downward or upward.Since the density of magnesium alloy is small, molten accumulated heat is held
It measures small and thermal conductivity is big, aluminium alloy temperature in flow process is caused to reduce rapidly, easily oxidation and air-breathing, and the ratio of oxide
Weight is close with light alloy liquid phase, and the oxide being mixed into aluminium alloy is made to be difficult to exclude, and volume contraction is big after aluminium alloy solidification, is easy
The phenomenon that the defects of generating shrinkage cavity and porosity or slag inclusion, the position of U-shaped magnesium alloy member two-arm thin-walled is easy to happen misrun.
Summary of the invention
It is an object of the present invention to solve problems of the prior art, the precision for providing a kind of U-shaped magnesium alloy member is poured
Note technique, fills type quick and stable, and the certified product rate of product is high.
In order to solve the above technical problems, the precision pouring technique of a kind of U-shaped magnesium alloy member of the invention successively includes as follows
Step: (1) making the shape mold of U-shaped part model and the core mould for coring processed respectively, and the shape mold includes
Symmetrical upper die and lower die, the die cavity of the upper die and lower die can surround the shape for constituting U-shaped part model；(2) by soluble material
High pressure is injected in core mould, is taken out from core mould after cooling and shaping and is obtained soluble core；(3) by soluble core by positioning
It is placed in the die cavity of the shape mold, upper die and lower die mould assembly is simultaneously locked；(4) the configuration production U-shaped workpiece mould in dewaxing machine
Mould material needed for type, and mould material is injected into the die cavity of shape mold；(5) U-shaped workpiece entirety mould is formed after mould material cooling and shaping
Type separates upper mold with lower die, takes out U-shaped workpiece overall model；(6) U-shaped workpiece overall model is immersed in the water, soluble core
After dissolution, U-shaped workpiece wax-pattern is obtained；(7) other components of U-shaped workpiece wax-pattern and running gate system are subjected to a group mould, are constituted after organizing mould
Complete casting wax-pattern；The casting wax-pattern includes the upward U-shaped type chamber of two-arm, is equipped with and opens below the front side of the U-shaped type chamber
Mouthful downward sprue cup, the upper port of the sprue cup are connected with the main cross gate of snakelike variable cross-section to extend back and to left and right
The auxiliary cross gate of snakelike variable cross-section extended, the snakelike main cross gate of variable cross-section and the auxiliary cross gate of snakelike variable cross-section are round cut
It face and is gradually increased along molten metal flow direction sectional area, the rear end of the snakelike main cross gate of variable cross-section, which is connected with, to be upwardly extended
Main sprue, the upper end of the main sprue is connected with the Gong Duan bottom centre of the U-shaped type chamber；Two snakelike become cut
The external end head of the auxiliary cross gate in face is connected separately with the transition sprue upwardly extended, divides on rear side of the top of the two transition sprues
Not Tong Guo gap running channel be connected with the two-arm thinnest part of the U-shaped type chamber；The bottom of the main sprue and the transition sprue
Portion's side wall is connected separately with snakelike collection slag buffer；(8) casting wax-pattern is soaked in 4~6 minutes progress degreasings in boric acid, then
In casting wax pattern surface brushing fire resisting starch adhesive, fire resisting surface layer is formed after solidification, is bonded on the outside of horizontal direction and is extended in fire resisting surface layer
Heat pipe, the inner termination of the heat pipe is bonded at the thermal center of U-shaped workpiece wax-pattern, and the external end head of the heat pipe is equipped with copper billet；
(9) brushing fireproof coating is continued in the periphery of fire resisting surface layer, stucco forms the first fire resisting coating on fireproof coating, then proceedes to
Simultaneously stucco sequentially forms the second to the 6th fire resisting coating to brushing fireproof coating, and the type for being wrapped in casting wax-pattern periphery is formed after solidification
Shell；(10) shell is put into dewaxing kettle, is dewaxed using hot water；(11) the shell after dewaxing is put into roasting kiln roasting, it is cold
But to taking out after pouring temperature；(12) shell is placed in sandbox, potting resin sand carries out moulding, resin between shell and sandbox
Solidification after sand filling is closely knit；(13) shell is placed on above the sealing cover of holding furnace together with sandbox, the center of sealing cover is equipped with
The cast gate of stalk, shell is docked with stalk downwards, the lower port closing of the stalk, the lower circumferential of the stalk
It is equipped with stalk inlet, is equipped with the pneumatic operated valve that can stalk inlet closed or be opened at the stalk inlet
Door, the stalk circumference of stalk inlet side are equipped with the operated pneumatic valve chamber that can accommodate operated pneumatic valve, described liter of liquid
The upper and lower ends of pipe inlet and operated pneumatic valve chamber are respectively equipped with the door track for operated pneumatic valve sliding, the intracavitary end of operated pneumatic valve
The upper and lower ends of head have been respectively fixedly connected with tension spring, and the other end of the tension spring extends and connects along the circular arc of operated pneumatic valve chamber respectively
It connects on the doorframe of operated pneumatic valve；Be additionally provided in the circumferential wall of the stalk along axially through inert gas axial channel,
The middle part of the intracavitary end of operated pneumatic valve promotes mouth to be connected with the inert gas axial channel by closing the door；(14) by high pressure
Inert gas inputs the inert gas axial channel, and a part of inert gas promotes mouth to enter operated pneumatic valve from the shutdown
Chamber pushes operated pneumatic valve that the tension of tension spring is overcome to advance and closes stalk inlet, and another part inert gas leads to alloy
Liquid bottom carries out refining degasification to aluminium alloy, stops input inert gas, work of the operated pneumatic valve in tension spring after refining degasification
It under, is retracted in operated pneumatic valve chamber, stalk inlet is opened, and the air inlet pipe air inlet on sealing cover, magnesium molten metal enters liter
Liquid pipe inner cavity enters investment shell intracavity by stalk and fills type, and after boosted, pressure maintaining and release, cooling obtains U-shaped magnesium alloy member.
Compared with the existing technology, the present invention achieves following the utility model has the advantages that intact wax-pattern, which 1. will be made, is soaked in boric acid
Middle degreasing can increase the fire retardant absorption of wax pattern surface, prepare for subsequent brushing；2. being produced after brushing fire resisting surface layer
The thick general goals (i.e. thermal center) of product is bonded heat pipe, using heat pipe+copper billet as cooling system, the high heat-transfer performance of heat pipe and copper billet
Heat can be exported and be distributed rapidly by high thermal conductivity coefficient, to enable to be cooled well at product thermal center, reduce product because
Thermal center overheat and bring is loose, shrinkage porosite, hot tearing bad defect, and product consecutive solidification can be enable again, improve product
Internal soundness.The external end head of heat pipe first uses steel brush bristle, enhances the adsorption capacity on surface, then smears solder(ing) paste, solder(ing) paste thickness
It controls in 0.5mm-1mm, then copper billet is plugged on to the external end head of heat pipe, the temperature of heat gun is then adjusted to 500 DEG C, to welding
Place is toasted, when becoming silver color by ash to color, and having the rosin of yellow transparent to flow out, subsequently into cooling and solidifying；So both
It can guarantee good thermal conductivity between heat pipe and copper billet, and may be reused, reduce cost.3. stalk inlet is arranged
On the lower circumferential of stalk, it is not easy to suck the slag inclusion of holding furnace furnace bottom, can shorten stalk lower end and furnace bottom away from
From reducing the waste of material of aluminium alloy.4. degasification is carried out in the environment of closing, so that the space that aluminium alloy is contacted with air
It is limited, the effect of refining degasification is considerably increased, the quality of aluminium alloy is improved；Using inert gas deaeration, safety, no dirt
Dye, it is high-efficient.5. liquid magnesium alloy enters sprue cup from bottom to top, then along the main cross gate of snakelike variable cross-section to the bottom of main sprue
Portion's flowing, along the auxiliary cross gate of snakelike variable cross-section to the flows of transition sprue, then liquid magnesium alloy is from the upper of main sprue
End enters the total end of U-shaped type chamber, gradually fills type upwards, and the liquid level in transition sprue also synchronizes steady raising, when filling type to U-shaped
When the two-arm position of type chamber, liquid magnesium alloy can enter the two-arm thinnest part of U-shaped type chamber by gap running channel simultaneously, continue up
Type is filled, is finished until entire U-shaped type chamber is filled type, it can be existing to avoid misrun common herein from most thin position injection magnesium liquid
As.Cross gate is played the role of warm punching significantly, is also easy to produce volume gas when reducing casting using round variable cross-section and serpentine-like fluctuating
Generation, reduce the generation of stomata and secondary oxidation；Flow section is bigger in the backward for each snakelike variable cross-section cross gate, magnesium
The flow velocity of aluminium alloy is slower, greatly reduces the impact force of magnesium liquid, so that magnesium liquid can be with the flowing of quick and stable, in cross gate
Wavy Tortuous flow is conducive to skimming.Snakelike collection slag buffer can buffer the magnesium of main sprue and transition sprue bottom
Aluminium alloy impact force buffers the magnesium liquid generated because manually holding the unstable bring poring rate of packet too fast in casting process and overran
The phenomenon that stream, reduces Secondary Oxidizing Slag of the magnesium liquid because being poured unstable generation.It is steadily quick that the running gate system fills type, skimming
Can be good, it ensure that formed product certified product rate.
As an improvement of the present invention, step (2) in soluble material the preparation method is as follows: 1. containing by following components and weight
Amount prepares raw material, industrial urea: 52 parts, nitrate: 23 parts, polyethylene glycol: 16 parts and pure water: 9 parts；2. first by industrial urea
It is mixed with pure water, heating fusing, then after uniform stirring, adds nitrate and polyethylene glycol, and stir evenly.The solvable material
Improve the hygroscopicity and brittleness of industrial urea in material using nitrate and polyethylene glycol, type core can be improved after high pressure injection moulding
Surface smoothness；U-shaped workpiece overall model into the water after, the dissolving speed of type core is fast, improve production efficiency.
As a further improvement of the present invention, step (3) in upper die and lower die mould assembly when, the positioning pin of upper mold four corners
It is inserted into the dowel hole of lower die four corners respectively, between the lower end of each positioning pin and the bottom of corresponding dowel hole
It is respectively equipped with compressed spring.After the pressure that upper mold top surface is subject to is eliminated, positioning pin is ejected one by the tension of compressed spring upwards
Segment distance solves the problems, such as that upper mold is difficult to separate with lower die, avoids prizing bad upper mold even damage model when modulus type.
As a further improvement of the present invention, step (4) described in mould material the production method is as follows: first by the river wax of 20wt%
After thawing, the polyethylene of 5wt% and the ethyl cellulose of 5wt% are added while stirring, the pine of 40wt% is added after all fusings
Perfume (or spice) is eventually adding the paraffin of 30wt%, and stir evenly after rosin all fusing.Wax pattern surface finish made of the mould material
Height, for roughness index up to 1.6, the shrinking percentage of wax-pattern can drop to 0.78% from 0.88%, keep the dimensional accuracy of wax-pattern higher.
As a further improvement of the present invention, step (8) in fire resisting starch adhesive uniformly mixed by fireproof coating and diamond spar mountain flour
Form, the fireproof coating the preparation method is as follows: 1. prepare raw material by following components and weight content, silica: 25 parts,
Water: 15 parts, absolute alcohol: 20 parts, magnesia powder: 15 parts, boric acid: 20 parts and sulphur: 5 parts, the above ingredient is uniformly mixed simultaneously
Stirring forms neutral binder, and temperature is controlled at 30~40 DEG C；2. put into neutral binder the magnesia powder of 1 parts by weight,
The diamond spar mountain flour of the sulphur of 1.05 parts by weight and 1.03 parts by weight continues stirring 1 hour；3. continuing to add the alkyl of 3 parts by weight
Phenol polyoxyethyl ether continues stirring 45~60 minutes.With compared with traditional fireproof coating that silica flour and bauxite are constituted, this hair
Bright fireproof coating increases the combination of magnesia powder, boric acid and sulphur, and the anti-oxidant and flame retardant property of shell can be improved,
Avoid the oxidation of liquid magnesium alloy；The surface-active of wax-pattern can be improved in the alkyl phenol polyoxyethyl ether being eventually adding, and applies fire resisting
Material, which has, is preferably coated with ability.
As a further improvement of the present invention, step (9) in the 4th and layer 5 fire resisting coating sanding material be 50wt%
Precoated sand and 50 wt% yellow ground, the sanding material of remaining each fire resisting coating are quartz sand.4th and layer 5 fire resisting coating use
Precoated sand and yellow ground are convenient for clear shell as sanding material, reduce product because unclear (dead angle) the bring scrap of clear shell increases, increase
The collapsibility of adding type shell, without influencing the original gas permeability of shell.The sanding material of remaining each layer uses quartz sand, guarantees shell
Intensity.
As a further improvement of the present invention, (11) middle maturing temperature of the shell in roaster is 850 DEG C to step, until nothing
Until cigarette, then takes out shell and be put into covering mixed liquor 5~8 minutes, then shell is reentered into roaster, temperature control
System is at 400~500 DEG C and keeps the temperature 0.5~1 hour, is then shut off roaster, takes out shell after temperature is cooled to pouring temperature；
It is described covering mixed liquor the preparation method is as follows: the boric acid crystal of 20 parts by weight is put into the hot water of 70 parts by weight, stirring makes
It is completely dissolved, and the coverture for adding 10 parts by weight stirs evenly.First by shell high-temperature roasting until smokelessly, shell is made to be formed
And there is certain hardness, then shell is put into the covering mixed liquor containing boric acid, so that shell surface is covered fire retardant, improves
Then shell is kept the temperature 0.5~1 hour at 400~500 DEG C and is cooled to pouring temperature, eliminates shell by its flame retardant property
Internal stress keeps the profile variation in casting minimum.
As a further improvement of the present invention, step (12) in moulding carried out in modelling mechanism, the modelling mechanism packet
The moulding plate of tight flask is included, shell is placed in the bottom centre of sandbox inner cavity and cast gate is downward, and the moulding plate is fixed
In on swinging seat bottom plate, the swinging seat bottom plate is respectively arranged on the left side and the right side the swinging seat riser holded up upwards, shakes described in two
It is connected separately with the swinging shaft stretched out outward in the middle part of the outer end face of swing seat riser, is respectively hinged in the middle part of the swinging shaft solid
The upper end of fixed rack, the external end head of the swinging shaft are connected separately with drive disk, and the outer end face of the drive disk is connected separately with
The axis of the drive disk crank stretched out outward, the drive disk crank is parallel to the axis of the swinging shaft；The drive disk
The external end head of crank is connected separately with rocker arm, and the axis of the rocker arm is respectively perpendicular to the axis of the drive disk crank, described
The free end of rocker arm is connected separately with rocker-arm roller pin, and the axis of the rocker-arm roller pin is respectively parallel to the axis of the drive disk crank,
The rocker-arm roller pin is plugged in the kidney-shaped elongated slot of connecting rod one end respectively and can slide along kidney-shaped elongated slot, and the free end of the connecting rod is total
With being hinged on total drive rod, one end of total drive rod is hinged on the free end of cam, the fixing end connection of the cam
On the motor shaft of motor, the motor is fixed on motor cabinet, and the motor cabinet and the fixed bracket are individually fixed in ground
On face.It after sandbox lumen loading expires resin sand, is fixed on swinging seat bottom plate, starts motor, motor driven cam rotates, always
One end of connecting rod is driven to circle while drive rod is around the fixing end rotation of cam, the other end of connecting rod passes through rocker-arm roller pin
Drive drive disk crank swing, drive disk crank drive drive disk swing, drive disk by swinging shaft drive swinging seat riser with
Swinging seat bottom plate is swung, and sandbox reciprocally swinging on swinging seat bottom plate, the centrifugal force of generation keeps resin sand gradually closely knit.With it is artificial
It pounds reality ratio, greatly reduces labor intensity, the quality of moulding is guaranteed.
As a further improvement of the present invention, the sandbox is equal with the top of the swinging seat riser, waves described in two
It is connected with compression bar between the top of seat riser, the top of the sandbox is pressed in the middle part of the compression bar；It is set on the moulding plate
There are sandbox locating slot and formwork locating slot, the bottom of the sandbox is equipped with the sandbox location lug extended downwardly, the sandbox positioning
Tenon is plugged in the sandbox locating slot；The bottom of the shell is equipped with the formwork location lug extended downwardly, the formwork positioning
Tenon is plugged in the formwork locating slot.Shell and sandbox can be made quick and precisely to position；Screw the screw at compression bar both ends
Sandbox is fixed on moulding plate, it is very convenient quick.
As a further improvement of the present invention, the outer end face center of the swinging seat riser is separately installed with heating unit.
Swinging seat riser be it is copper, heating unit generate heat sandbox is passed to by swinging seat riser, shorten the solidification of resin sand
Time improves production efficiency.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, attached drawing only provide with reference to
Illustrate to use, it is non-to limit the present invention.
Fig. 1 is the main view of the precision pouring technique of U-shaped magnesium alloy member of the present invention.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the perspective view of Fig. 1.
Fig. 4 is the working state figure of modelling mechanism used in the present invention.
Fig. 5 is the working state figure when present invention fills type.
Fig. 6 is the main view of stalk in Fig. 5.
Fig. 7 be Fig. 6 in inert gas aeration status along the sectional view of A-A.
Fig. 8 is that inert gas holds one's breath state along the sectional view of A-A in Fig. 6.
Fig. 9 is Fig. 6 stalk inlet perspective view in the open state.
Figure 10 is the cross-sectional view of Fig. 9 inert gas aeration status.
Figure 11 is that Fig. 9 inert gas is held one's breath the cross-sectional view of state.
In figure: 1. shells；1a.U shape type chamber；1b. sprue cup；The main cross gate of the snakelike variable cross-section of 1c.；The snakelike variable cross-section of 1d.
Auxiliary cross gate；The main sprue of 1e.；1f. transition sprue；The gap 1g. running channel；The snakelike collection slag buffer of 1h.；2. sandbox；3. sand
Bottom plate；4. swinging seat bottom plate；5. swinging seat riser；6. swinging shaft；7. fixed bracket；8. drive disk；9. drive disk crank；
10. rocker arm；11. rocker-arm roller pin；12. connecting rod；12a. kidney-shaped elongated slot；13. total drive rod；14. cam；15. motor；16. motor cabinet；
17. compression bar；18. heating unit；19. holding furnace；20. sealing cover；20a. air inlet pipe；21. stalk；21a. stalk feed liquor
Mouthful；21b. inert gas axial channel；21c., which closes the door, promotes mouth；21d. operated pneumatic valve chamber；21e. door track；21f. operated pneumatic valve；
21g. tension spring.
Specific embodiment
In the following description of the present invention, the orientation or positional relationship of the instructions such as term "front", "rear", "left", "right" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, without referring to that device must
There must be specific orientation.
The precision pouring technique of U-shaped magnesium alloy member of the present invention, in turn includes the following steps: (1) making U-shaped workpiece mould respectively
The shape mold of type and core mould for coring processed, the shape mold includes symmetrical upper die and lower die, it is described on
Mould and the die cavity of lower die can surround the shape for constituting U-shaped part model；(2) soluble material high pressure is injected in core mould, it is cooling
It is taken out from core mould after sizing and obtains soluble core；(3) soluble core is placed in the die cavity of the shape mold by positioning
In, upper die and lower die mould assembly is simultaneously locked；(4) the mould material needed for configuration production U-shaped part model in dewaxing machine, and mould material is infused
It injects in the die cavity of shape mold；(5) U-shaped workpiece overall model is formed after mould material cooling and shaping, and upper mold is separated with lower die, is taken
U-shaped workpiece overall model out；(6) U-shaped workpiece overall model is immersed in the water, after soluble core dissolution, obtains U-shaped workpiece wax-pattern；
(7) other components of U-shaped workpiece wax-pattern and running gate system are subjected to a group mould, constitute complete casting wax-pattern after organizing mould；It (8) will casting
Wax-pattern is soaked in 4~6 minutes progress degreasings in boric acid, then in casting wax pattern surface brushing fire resisting starch adhesive, is formed after solidification resistance to
Fiery surface layer, is bonded the heat pipe extended on the outside of horizontal direction in fire resisting surface layer, and the inner termination of the heat pipe is bonded in U-shaped workpiece wax-pattern
Thermal center at, the external end head of the heat pipe is equipped with copper billet；(9) brushing fireproof coating is continued in the periphery of fire resisting surface layer, in fire resisting
Stucco forms the first fire resisting coating on coating, then proceedes to brushing fireproof coating and stucco sequentially forms the second to the 6th fire resisting and covers
Layer forms the shell for being wrapped in casting wax-pattern periphery after solidification；(10) shell is put into dewaxing kettle, is dewaxed using hot water；
(11) the shell after dewaxing is put into roasting kiln roasting, is taken out after being cooled to pouring temperature；(12) shell is placed in sandbox, type
Potting resin sand carries out moulding between shell and sandbox, solidification after resin sand filling is closely knit；(13) shell is placed on guarantor together with sandbox
20 top of sealing cover of warm furnace 19, the center of sealing cover 20 are equipped with stalk 21, and the cast gate of shell is right with stalk 21 downwards
It connects, as shown in Fig. 5 to Figure 11, the lower port of stalk 21 is closed, and the lower circumferential of stalk 21 is equipped with stalk inlet
At 21a, stalk inlet 21a be equipped with can will stalk inlet 21a closing or open operated pneumatic valve 21f, stalk into
The stalk circumference of the side liquid mouth 21a is equipped with the operated pneumatic valve chamber 21d, stalk inlet 21a that can accommodate operated pneumatic valve 21f
And the upper and lower ends of operated pneumatic valve chamber 21d are respectively equipped with the door track 21e for operated pneumatic valve 21f sliding, the inner end operated pneumatic valve chamber 21d
The upper and lower ends of head have been respectively fixedly connected with tension spring 21g, and circular arc of the other end of tension spring 21g respectively along operated pneumatic valve chamber 21d prolongs
It stretches and is connected on the doorframe of operated pneumatic valve 21f；Be additionally provided in the circumferential wall of stalk 21 along axially through inert gas axis
To duct 21b, the middle part of operated pneumatic valve chamber 21d inner termination promotes mouth 21c to be connected with inert gas axial channel 21b by closing the door
It is logical；(14) high-pressure inert gas is inputted into inert gas axial channel 21b, a part of inert gas promotes mouth 21c to enter from closing the door
Operated pneumatic valve chamber 21d pushes operated pneumatic valve 21f that the tension of tension spring 21g is overcome to advance and closes stalk inlet 21a, another
Part inert gas leads to aluminium alloy bottom and carries out refining degasification to aluminium alloy, stops input indifferent gas after refining degasification
Body, operated pneumatic valve 21f are retracted in operated pneumatic valve chamber 21d under the action of tension spring 21g, and stalk inlet 21a is opened, close
Air inlet pipe 20a air inlet in capping 20, magnesium molten metal enter stalk inner cavity, fill type into investment shell intracavity by stalk 21,
After boosted, pressure maintaining and release, cooling obtains U-shaped magnesium alloy member.
Step (2) in soluble material the preparation method is as follows: 1. preparing raw material, industry urine by following components and weight content
Element: 52 parts, nitrate: 23 parts, polyethylene glycol: 16 parts and pure water: 9 parts；2. first industrial urea and pure water are mixed, heating
Fusing, then after uniform stirring, nitrate and polyethylene glycol are added, and stir evenly.In the soluble material using nitrate and
Polyethylene glycol improves the hygroscopicity and brittleness of industrial urea, and the surface smoothness of type core can be improved after high pressure injection moulding；U-shaped
Workpiece overall model into the water after, the dissolving speed of type core is fast, improve production efficiency.
Step (3) in upper die and lower die mould assembly when, the positioning pin of upper mold four corners is inserted into determining for lower die four corners respectively
In the pin hole of position, compressed spring is respectively equipped between the lower end of each positioning pin and the bottom of corresponding dowel hole.Work as upper mold
After the pressure that top surface is subject to is eliminated, positioning pin is ejected a small distance by the tension of compressed spring upwards, solves upper mold and lower die
It is difficult to the problem of separating, avoids prizing bad upper mold even damage model when modulus type.
Step (4) described in mould material the production method is as follows: after first melting the river wax of 20wt%, 5wt% is added while stirring
Polyethylene and 5wt% ethyl cellulose, the rosin of 40wt% is added after all fusings, after rosin all fusing, most
The paraffin of 30wt% is added afterwards, and stirs evenly.Wax pattern surface made of the mould material is highly polished, roughness index up to 1.6,
The shrinking percentage of wax-pattern can drop to 0.78% from 0.88%, keep the dimensional accuracy of wax-pattern higher.
As shown in Figure 1 to Figure 3, step (7) in casting wax-pattern include the upward U-shaped type chamber 1a of two-arm, U-shaped type chamber 1a's
The sprue cup 1b that Open Side Down is equipped with below front side, the upper port of sprue cup 1b is connected with the main cross of snakelike variable cross-section to extend back
Running channel 1c and the auxiliary cross gate 1d of the snakelike variable cross-section extended to left and right, the snakelike main cross gate 1c of variable cross-section and snakelike variable cross-section are auxiliary
Cross gate 1d is circular cross-section and the product of the invention along molten metal flow direction section is gradually increased, and snakelike variable cross-section is main horizontal to be poured
The rear end of road 1c is connected with the main sprue 1e upwardly extended, in the upper end of main sprue 1e and the total end bottom of U-shaped type chamber 1a
The heart is connected.
The external end head of the two snakelike auxiliary cross gate 1d of variable cross-section is connected separately with the transition sprue 1f upwardly extended, two transition
It is connected respectively by gap running channel 1g with the two-arm of U-shaped type chamber 1a on rear side of the top of sprue 1f；Gap running channel 1g is separately connected
At the most thin position of U-shaped type chamber 1a two-arm.
The bottom sidewall of main sprue 1e and transition sprue 1f are connected separately with snakelike collection slag buffer 1h.
Liquid magnesium alloy enters sprue cup 1b from bottom to top, then along the main cross gate 1c of snakelike variable cross-section to main sprue 1e's
Flows, along the auxiliary cross gate 1d of snakelike variable cross-section to the flows of transition sprue 1f, then liquid magnesium alloy is directly poured from master
The upper end of road 1e enters the total end of U-shaped type chamber 1a, gradually fills type upwards, and the liquid level in transition sprue 1f also synchronizes steady liter
Height, when filling two-arm position of the type to U-shaped type chamber 1a, liquid magnesium alloy can enter U-shaped type chamber 1a by gap running channel 1g simultaneously
Two-arm, continue up and fill type, until entire U-shaped type chamber 1a is filled type finishing.Magnesium is injected at the position most thin from U-shaped type chamber two-arm
Liquid can be to avoid misrun phenomenon common herein.Because each cross gate is snakelike change intercept form, flow section is bigger in the backward,
The flow velocity of liquid magnesium alloy is slower, greatly reduces the impact force of magnesium liquid, so that magnesium liquid can be with the flowing of quick and stable, in cross gate
In wavy Tortuous flow be conducive to skimming.Snakelike collection slag buffer 1h can buffer main sprue 1e and transition sprue 1f
The liquid magnesium alloy impact force of bottom buffers the magnesium generated because manually holding the unstable bring poring rate of packet too fast in casting process
Liquid overrun overcurrent the phenomenon that, reduce Secondary Oxidizing Slag of the magnesium liquid because being poured unstable generation.It is steadily fast that the running gate system fills type
Speed, skimming performance is good, ensure that formed product certified product rate.
The external end head of step (8) heat pipe first uses steel brush bristle, enhances the adsorption capacity on surface, then smears solder(ing) paste, solder(ing) paste
Thickness control is in 0.5mm-1mm, then copper billet is plugged on to the external end head of heat pipe, and the temperature of heat gun is then adjusted to 500 DEG C, right
Weld is toasted, when becoming silver color by ash to color, and having the rosin of yellow transparent to flow out, subsequently into cooling and solidifying；This
Sample can not only guarantee good thermal conductivity between heat pipe and copper billet, but also may be reused, and reduce cost.
Step (8) in fire resisting starch adhesive be uniformly mixed by fireproof coating and diamond spar mountain flour, the preparation of the fireproof coating
Method is as follows: 1. prepare raw material by following components and weight content, silica: 25 parts, water: and 15 parts, absolute alcohol: 20 parts,
Magnesia powder: 15 parts, boric acid: 20 parts and sulphur: 5 parts, the above ingredient is uniformly mixed and stirred for form neutral binder, temperature
Control is at 30~40 DEG C；2. putting into the magnesia powder of 1 parts by weight, the sulphur of 1.05 parts by weight and 1.03 weights into neutral binder
The diamond spar mountain flour for measuring part continues stirring 1 hour；3. continue to add the alkyl phenol polyoxyethyl ether of 3 parts by weight, continue stirring 45~
60 minutes.Compared with by traditional fireproof coating that silica flour and bauxite are constituted, fireproof coating of the invention increases magnesia
The combination of powder, boric acid and sulphur can be improved the anti-oxidant and flame retardant property of shell, avoid the oxidation of liquid magnesium alloy；Finally plus
The surface-active of wax-pattern can be improved in the alkyl phenol polyoxyethyl ether entered, has fireproof coating and is preferably coated with ability.
Step (9) in the 4th and layer 5 fire resisting coating sanding material be 50wt% precoated sand and 50 wt% yellow ground, remaining
The sanding material of each fire resisting coating is quartz sand.4th and layer 5 fire resisting coating using precoated sand and yellow ground as sanding material
Convenient for clear shell, product is reduced because unclear (dead angle) the bring scrap of clear shell increases, increases the collapsibility of shell, without effect type
The original gas permeability of shell.The sanding material of remaining each layer uses quartz sand, guarantees the intensity of shell.
Step (10) in, the shell after dewaxing includes that sprue cup 1b and upward U-shaped type the chamber 1a, sprue cup 1b of two-arm are located at U
Below the front side of shape type chamber 1a and Open Side Down, and the upper port of sprue cup 1b is connected with that the snakelike variable cross-section to extend back is main horizontal to be poured
Road 1c and the snakelike variable cross-section extended to left and right auxiliary cross gate 1d, the snakelike main cross gate 1c of variable cross-section and the auxiliary cross of snakelike variable cross-section
Running channel 1d is circular cross-section and the product of the invention along molten metal flow direction section is gradually increased, the snakelike main cross gate of variable cross-section
The rear end of 1c is connected with the main sprue 1e upwardly extended, the upper end of main sprue 1e and the Gong Duan bottom centre of U-shaped type chamber 1a
It is connected.The external end head of the two snakelike auxiliary cross gate 1d of variable cross-section is connected separately with the transition sprue 1f upwardly extended, two transition
It is connected respectively by gap running channel 1g with the two-arm of U-shaped type chamber 1a on rear side of the top of sprue 1f；Gap running channel 1g is separately connected
At the most thin position of U-shaped type chamber 1a two-arm.The bottom sidewall of main sprue 1e and transition sprue 1f are connected separately with snakelike
Collect slag buffer 1h.
(11) middle maturing temperature of the shell in roaster is 850 DEG C to step, until smokeless, then take out shell and is put into
It covers in mixed liquor 5~8 minutes, then shell is reentered into roaster, temperature control is at 400~500 DEG C and keeps the temperature 0.5
~1 hour, it is then shut off roaster, takes out shell after temperature is cooled to pouring temperature；The preparation side of the covering mixed liquor
Method is as follows: the boric acid crystal of 20 parts by weight being put into the hot water of 70 parts by weight, stirring makes it completely dissolved, and adds 10 weight
The coverture of part stirs evenly.First by shell high-temperature roasting until smokeless, so that shell is formed and there is certain hardness, then by type
Shell is put into the covering mixed liquor containing boric acid, so that shell surface is covered fire retardant, is improved its flame retardant property, then shell exists
0.5~1 hour is kept the temperature at 400~500 DEG C and is cooled to pouring temperature, eliminates the internal stress of shell, makes deformation outside in casting
Change minimum.
As shown in figure 4, step (12) in moulding carried out in modelling mechanism, modelling mechanism includes the sandbox of tight flask 2
The bottom centre of bottom plate 3, sandbox inner cavity is equipped with shell 1, and the cast gate of shell 1 is downward, and moulding plate 3 is fixed on swinging seat bottom plate 4
On, swinging seat bottom plate 4 is respectively arranged on the left side and the right side the swinging seat riser 5 holded up upwards, in the outer end face of two swinging seat risers 5
Portion is connected separately with the swinging shaft 6 stretched out outward, and the middle part of swinging shaft 6 is respectively hinged at the upper end of fixed bracket 7, swinging shaft
6 external end head is connected separately with drive disk 8, and the outer end face of drive disk 8 is connected separately with the drive disk crank 9 stretched out outward,
The axis of drive disk crank 9 is parallel to the axis of swinging shaft 6；The tie point of drive disk crank 9 and swinging shaft 6 and drive disk 8 point
The both ends of disk diameter Wei Yu not driven.The external end head of drive disk crank 9 is connected separately with rocker arm 10, and the axis of rocker arm 10 hangs down respectively
Directly in the axis of drive disk crank 9, the free end of rocker arm 10 is connected separately with rocker-arm roller pin 11, and the axis difference of rocker-arm roller pin 11 is parallel
In the axis of drive disk crank 9, rocker-arm roller pin 11 is plugged in the kidney-shaped elongated slot 12a of 12 one end of connecting rod respectively and can be along kidney-shaped elongated slot
12a sliding, the free end of connecting rod 12 are hinged on jointly on total drive rod 13, and one end of total drive rod 13 is hinged on oneself of cam 14
By holding, the fixing end of cam 14 is connected on the motor shaft of motor 15, and motor 15 is fixed on motor cabinet 16, motor cabinet 16 and solid
Fixed rack 7 is individually fixed on ground.
It after 2 lumen loading of sandbox expires resin sand, is fixed on swinging seat bottom plate 4, starts motor 15, motor 15 drives convex
14 rotation of wheel drives one end of connecting rod 12 to circle, connecting rod while total drive rod 13 is around the fixing end rotation of cam 14
12 other end drives drive disk crank 9 to swing by rocker-arm roller pin 11, and drive disk crank 9 drives drive disk 8 to swing, drive disk 8
Swinging seat riser 5 and swinging seat bottom plate 4 is driven to swing by swinging shaft 6, the reciprocally swinging on swinging seat bottom plate 4 of sandbox 2 generates
Centrifugal force keep resin sand gradually closely knit.With reality ratio of manually pounding, labor intensity is greatly reduced, the quality of moulding is protected
Card.
Sandbox 2 is equal with the top of swinging seat riser 5, is connected with compression bar 17, compression bar between the top of two swinging seat risers 5
17 middle part is pressed in the top of sandbox 2.Sandbox 2 can be fixed on moulding plate 3 by the screw for screwing 17 both ends of compression bar, very
It is convenient and efficient.
Moulding plate 3 is equipped with sandbox locating slot and formwork locating slot, and it is fixed that the bottom of sandbox 2 is equipped with the sandbox extended downwardly
Position tenon, sandbox location lug are plugged in sandbox locating slot；The bottom of shell 1 is equipped with the formwork location lug extended downwardly, and formwork is fixed
Position tenon is plugged in formwork locating slot, and shell 1 and sandbox 2 can be made quick and precisely to position.
The outer end face center of swinging seat riser 5 is separately installed with heating unit 18.Swinging seat riser 5 is copper, heating list
The heat that member 18 generates passes to sandbox 2 by swinging seat riser 5, shortens the curing time of resin sand, improves production efficiency.
The foregoing is merely the preferable possible embodiments of the present invention, non-therefore limitation patent protection model of the invention
It encloses.In addition to the implementation, the present invention can also have other embodiments.All skills formed using equivalent substitution or equivalent transformation
Art scheme, is all fallen within the protection domain of application claims.
Claims (9)
1. a kind of precision pouring technique of U-shaped magnesium alloy member, characterized in that in turn include the following steps: (1) making U-shaped work respectively
The shape mold of part model and core mould for coring processed, the shape mold includes symmetrical upper die and lower die, institute
The die cavity for stating upper die and lower die can surround the shape for constituting U-shaped part model；(2) soluble material high pressure is injected in core mould,
It is taken out from core mould after cooling and shaping and obtains soluble core；(3) soluble core is placed in the shape mold by positioning
In die cavity, upper die and lower die mould assembly is simultaneously locked；(4) the mould material needed for configuration production U-shaped part model in dewaxing machine, and by mould
Material is injected into the die cavity of shape mold；(5) U-shaped workpiece overall model is formed after mould material cooling and shaping, by upper mold and lower die point
From taking-up U-shaped workpiece overall model；(6) U-shaped workpiece overall model is immersed in the water, after soluble core dissolution, obtains U-shaped workpiece
Wax-pattern；(7) other components of U-shaped workpiece wax-pattern and running gate system are subjected to a group mould, constitute complete casting wax-pattern after organizing mould；Institute
Stating casting wax-pattern includes the upward U-shaped type chamber of two-arm, is equipped with the sprue cup that Open Side Down, institute below the front side of the U-shaped type chamber
The snakelike variable cross-section that the upper port for stating sprue cup is connected with the main cross gate of snakelike variable cross-section to extend back and extends to left and right is auxiliary
Cross gate, the snakelike main cross gate of variable cross-section and the auxiliary cross gate of snakelike variable cross-section are circular cross-section and along molten metal flowing side
It is gradually increased to sectional area, the rear end of the snakelike main cross gate of variable cross-section is connected with the main sprue upwardly extended, the master
The upper end of sprue is connected with the Gong Duan bottom centre of the U-shaped type chamber；The outer end of the two snakelike auxiliary cross gates of variable cross-section
Head is connected separately with the transition sprue upwardly extended, on rear side of the top of the two transition sprues respectively by gap running channel with
The two-arm thinnest part of the U-shaped type chamber is connected；The bottom sidewall of the main sprue and the transition sprue is connected separately with
Snakelike collection slag buffer；(8) casting wax-pattern is soaked in 4~6 minutes progress degreasings in boric acid, is then applied in casting wax pattern surface
Brush fire resisting starch adhesive forms fire resisting surface layer after solidification, the heat pipe extended on the outside of horizontal direction is bonded in fire resisting surface layer, the heat pipe
Inner termination is bonded at the thermal center of U-shaped workpiece wax-pattern, and the external end head of the heat pipe is equipped with copper billet；(9) in the periphery of fire resisting surface layer
Continue brushing fireproof coating, stucco forms the first fire resisting coating on fireproof coating, then proceedes to brushing fireproof coating and stucco
The second to the 6th fire resisting coating is sequentially formed, forms the shell for being wrapped in casting wax-pattern periphery after solidification；(10) shell is put into de-
In wax kettle, dewaxed using hot water；(11) the shell after dewaxing is put into roasting kiln roasting, is taken after being cooled to pouring temperature
Out；(12) shell is placed in sandbox, potting resin sand carries out moulding between shell and sandbox, solid after resin sand filling is closely knit
Change；(13) shell is placed on above the sealing cover of holding furnace together with sandbox, the center of sealing cover is equipped with stalk, and shell pours
Mouthful dock with stalk downwards, the lower port closing of the stalk, the lower circumferential of the stalk equipped with stalk into
Liquid mouth, is equipped with the operated pneumatic valve that can stalk inlet closed or be opened at the stalk inlet, the stalk into
The stalk circumference of liquid mouth side is equipped with the operated pneumatic valve chamber that can accommodate operated pneumatic valve, the stalk inlet and pneumatic operated valve
The upper and lower ends of door chamber are respectively equipped with the door track for operated pneumatic valve sliding, the upper and lower ends difference of the intracavitary end of operated pneumatic valve
It is fixedly connected with tension spring, the other end of the tension spring extends along the circular arc of operated pneumatic valve chamber respectively and is connected to the door of operated pneumatic valve
On frame；Be additionally provided in the circumferential wall of the stalk along axially through inert gas axial channel, the operated pneumatic valve is intracavitary
The middle part of end promotes mouth to be connected with the inert gas axial channel by closing the door；(14) described in high-pressure inert gas being inputted
Inert gas axial channel, a part of inert gas promote mouth to enter operated pneumatic valve chamber from the shutdown, push operated pneumatic valve gram
Stalk inlet is closed in the tension advance for taking tension spring, and another part inert gas, which leads to aluminium alloy bottom, carries out aluminium alloy
Degasification is refined, stops input inert gas after refining degasification, operated pneumatic valve is retracted to operated pneumatic valve under the action of tension spring
In chamber, stalk inlet is opened, and the air inlet pipe air inlet on sealing cover, magnesium molten metal enters stalk inner cavity, passes through stalk
Type is filled into investment shell intracavity, after boosted, pressure maintaining and release, cooling obtains U-shaped magnesium alloy member；Step (2) in soluble material system
Preparation Method is as follows: 1. prepare raw material by following components and weight content, industrial urea: 52 parts, nitrate: and 23 parts, polyethylene glycol:
16 parts and pure water: 9 parts；2. first mixing industrial urea and pure water, heating fusing, then after uniform stirring, add nitric acid
Salt and polyethylene glycol, and stir evenly.
2. the precision pouring technique of U-shaped magnesium alloy member according to claim 1, characterized in that step (3) in upper mold and under
When mould mould assembly, the positioning pin of upper mold four corners is inserted into respectively in the dowel hole of lower die four corners, each positioning pin
Compressed spring is respectively equipped between lower end and the bottom of corresponding dowel hole.
3. the precision pouring technique of U-shaped magnesium alloy member according to claim 1, characterized in that step (4) described in mould material
The production method is as follows: after first melting the river wax of 20wt%, the polyethylene of 5wt% and the ethyl cellulose of 5wt% are added while stirring
Element adds the rosin of 40wt% after all fusings, after rosin all fusing, is eventually adding the paraffin of 30wt%, and stir
Uniformly.
4. the precision pouring technique of U-shaped magnesium alloy member according to claim 1, characterized in that step (8) in refractory surface
Slurry is uniformly mixed by fireproof coating and diamond spar mountain flour, the fireproof coating the preparation method is as follows: 1. by following components and
Weight content prepares raw material, silica: 25 parts, water: 15 parts, absolute alcohol: 20 parts, magnesia powder: 15 parts, boric acid: 20 parts
And sulphur: 5 parts, the above ingredient is uniformly mixed and stirred for form neutral binder, temperature is controlled at 30~40 DEG C；2. to neutrality
The diamond spar mountain flour that the magnesia powder of 1 parts by weight, the sulphur of 1.05 parts by weight and 1.03 parts by weight are put into binder, continues to stir
1 hour；3. continuing to add the alkyl phenol polyoxyethyl ether of 3 parts by weight, continue stirring 45~60 minutes.
5. the precision pouring technique of U-shaped magnesium alloy member according to claim 1, characterized in that step (9) in the 4th and
The sanding material of five layers of fire resisting coating is 50wt% precoated sand and 50 wt% yellow ground, and the sanding material of remaining each fire resisting coating is stone
Sand.
6. the precision pouring technique of U-shaped magnesium alloy member according to claim 1, characterized in that (11) middle shell is roasting step
Burning the maturing temperature in furnace is 850 DEG C, until until smokeless, then take out shell and is put into and cover in mixed liquor 5~8 minutes, so
Shell is reentered into roaster afterwards, temperature control is at 400~500 DEG C and keeps the temperature 0.5~1 hour, it is then shut off roaster,
Shell is taken out after temperature is cooled to pouring temperature；It is described covering mixed liquor the preparation method is as follows: by the boric acid of 20 parts by weight
Crystal is put into the hot water of 70 parts by weight, and stirring makes it completely dissolved, and the coverture for adding 10 parts by weight stirs evenly.
7. the precision pouring technique of U-shaped magnesium alloy member according to claim 1, characterized in that step (12) in moulding exist
It is carried out in modelling mechanism, the modelling mechanism includes the moulding plate of tight flask, and shell is placed in the bottom of sandbox inner cavity
The heart and cast gate is downward, the moulding plate is fixed on swinging seat bottom plate, and the swinging seat bottom plate is respectively arranged on the left side and the right side
The swinging seat riser holded up upwards is connected separately with waving of stretching out outward in the middle part of the outer end faces of the two swinging seat risers
Axis is respectively hinged at support bracket fastened upper end in the middle part of the swinging shaft, and the external end head of the swinging shaft is connected separately with driving
Disk, the outer end face of the drive disk are connected separately with the drive disk crank stretched out outward, and the axis of the drive disk crank is flat
Row is in the axis of the swinging shaft；The external end head of the drive disk crank is connected separately with rocker arm, the axis difference of the rocker arm
Perpendicular to the axis of the drive disk crank, the free end of the rocker arm is connected separately with rocker-arm roller pin, the axis of the rocker-arm roller pin
It is respectively parallel to the axis of the drive disk crank, the rocker-arm roller pin is plugged in the kidney-shaped elongated slot of connecting rod one end respectively and can edge
The sliding of kidney-shaped elongated slot, the free end of the connecting rod are hinged on jointly on total drive rod, and one end of total drive rod is hinged on convex
The fixing end of the free end of wheel, the cam is connected on the motor shaft of motor, and the motor is fixed on motor cabinet, the electricity
Base and the fixed bracket are individually fixed on ground.
8. the precision pouring technique of U-shaped magnesium alloy member according to claim 7, characterized in that the sandbox shakes with described
The top of swing seat riser is equal, is connected with compression bar between the top of the two swinging seat risers, institute is pressed in the middle part of the compression bar
State the top of sandbox；The moulding plate is equipped with sandbox locating slot and formwork locating slot, and the bottom of the sandbox is equipped with downward
The sandbox location lug of stretching, the sandbox location lug are plugged in the sandbox locating slot；The bottom of the shell is equipped with downward
The formwork location lug of stretching, the formwork location lug are plugged in the formwork locating slot.
9. the precision pouring technique of U-shaped magnesium alloy member according to claim 7 or 8, characterized in that the swinging seat riser
Outer end face center be separately installed with heating unit.
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| CN109351931B (en) * | 2018-12-06 | 2023-09-05 | 扬州峰明光电新材料有限公司 | Precision casting complete equipment of aluminum alloy cylindrical shell with pore canal |
| CN113102693B (en) * | 2021-05-06 | 2022-11-29 | 四川固锐德科技有限公司 | Preparation method of planetary wheel set for heavy-duty vehicle wheel edge system |
| CN114042884B (en) * | 2021-10-27 | 2023-08-22 | 新兴铸管股份有限公司 | Method for manufacturing coating core of spheroidal graphite cast iron pipe |
| CN114713768B (en) * | 2022-05-19 | 2023-07-18 | 扬州峰明光电新材料有限公司 | Casting technology of thin-wall discontinuous magnesium alloy spherical shell of aircraft detector |
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| US4561491A (en) * | 1983-12-07 | 1985-12-31 | Rolls-Royce Limited | Investment casting |
| CN101607301A (en) * | 2008-06-18 | 2009-12-23 | 中国科学院金属研究所 | A kind of soluble core and preparation method thereof |
| CN102078919A (en) * | 2010-12-17 | 2011-06-01 | 西安西工大超晶科技发展有限责任公司 | Precision casting method of double-layer thin-wall bent pipe casting |
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| US4561491A (en) * | 1983-12-07 | 1985-12-31 | Rolls-Royce Limited | Investment casting |
| CN101607301A (en) * | 2008-06-18 | 2009-12-23 | 中国科学院金属研究所 | A kind of soluble core and preparation method thereof |
| CN102078919A (en) * | 2010-12-17 | 2011-06-01 | 西安西工大超晶科技发展有限责任公司 | Precision casting method of double-layer thin-wall bent pipe casting |
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