CN110434282A - A kind of double shrouded wheel water-glass sand coremaking moulding mold, tooling and method - Google Patents
A kind of double shrouded wheel water-glass sand coremaking moulding mold, tooling and method Download PDFInfo
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- CN110434282A CN110434282A CN201910832813.XA CN201910832813A CN110434282A CN 110434282 A CN110434282 A CN 110434282A CN 201910832813 A CN201910832813 A CN 201910832813A CN 110434282 A CN110434282 A CN 110434282A
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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
- B22C21/00—Flasks; Accessories therefor
- B22C21/02—Sectional flasks, i.e. with divided, articulated, or interchangeable side sections
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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
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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
- B22C7/06—Core boxes
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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
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- 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
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/086—Filters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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Abstract
The present invention provides the water-glass sand coremaking moulding mold and tooling of a kind of double shrouded wheel, it include: core box, leaf model, lower half, upper half model (containing insulating riser sleeve), drag box, cope and sprue cup, to wheel disc and wheel cap moulding and then inserting water-glass sand into sandbox；The sprue cup is arranged in cope, is used to form casting channel, by pouring into potting syrup, casting and forming double shrouded wheel into casting channel.The present invention also provides a kind of water-glass sand coremaking formative methods, comprising the following steps: coremaking front vane Model Mounting prepares sand core, makes lower sand mold, make sand mold, repair running channel, put insulating riser sleeve, place mould assembling after sand core.The present invention uses detachable leaf model, can make blade and inner cavity one-pass molding, simple process operates conveniently, and improves the accuracy of manufacture and inner cavity cleannes of impeller, impeller high yield rate.
Description
Technical field
The invention belongs to fluid machinery casting technology fields, and in particular to a kind of water-glass sand coremaking moulding of double shrouded wheel
With mold, tooling and method.
Background technique
Water pump is the machinery for conveying liquid or being pressurized liquid.It can be divided into three categories according to working principle and structure: leaf
Chip pump, positive displacement pump and other type of pump.Positive displacement pump is to transmit energy using the variation of its swept volume of a single chamber；Vane type oil pump
It is to transmit energy using the interaction of rotary vane and water, centrifugal pump, peripheral pump, mixed-flow pump and axial-flow pump etc. can be divided into
Type.Impeller (piece) is a core component in vane type oil pump, there is very big influence to the using effect of water pump.Impeller is pressed
Construction can be divided into open type, semi-open type and three kinds of enclosed.Wherein, there are cover board in the blade two sides of double shrouded wheel, by wheel disc, blade and
Wheel cap composition, can adjust the flow condition of liquid in pumping, improve the working efficiency of pump, free from foreign meter peace and quiet suitable for conveying
Liquid, general centrifugal pump mostly use such.
Since the structure of double shrouded wheel is complicated compared with open type and half-opened impeller, larger difficulty is brought to manufacture.Currently, closing
The production method of formula impeller has whole manufacture (being mostly casting) and each component separately manufacturing (being mostly casting) welding or riveting afterwards
It connects into two kinds.Monoblock cast mode, apperance separation is difficult, and the local shapes such as apperance blade are easily damaged in molding to be caused to produce
The problems such as yield rate of product is low.The mode of welding blade is complicated for impeller inner cavity, impeller precision more than blade is difficult to meet and want
It asks.
For integral manufacturing mode: for example, application No. is a kind of " hot investment castings of 201710311915.8 Chinese patent applications
With the manufacturing process of pump housing impeller wax-pattern " a kind of manufacturing process of hot investment casting pump housing impeller wax-pattern is disclosed, by impeller point
At wheel disc, wheel cap and blade three parts, carry out the manufacture of wax-pattern respectively, after by wheel disc, wheel cap and blade assembling at impeller wax-pattern
Whole, reusable liquid wax flows into blade and the joint of wheel disc, blade and wheel cap bonds three parts.Application No. is
The Chinese patent application " the casting processing technology of dredging pump impeller " of 201710250066.X discloses a kind of resin of dredging pump impeller
Sand molding casts processing technology.This integral production method ensure that the quality of workpiece, however high production cost, production cycle
It is long, it is not suitable for double shrouded wheel labyrinth.
For assembled: for example, application No. is a kind of 201120238758.0 Chinese patent application " impeller blades
Welding tooling " discloses a kind of welding tool for blades of impeller, including rotatable circular disk rack, index dial, blade positioning backup plate and
Backup plate adjustable shelf, by circular disk rack be arranged impeller hub disk, by backup plate movable support band movable vane piece position backup plate adjust to
Blade is placed on backup plate and carries out spot welding by corresponding welding position.Spot welding method is although easy to operate, improves working efficiency,
But workpiece surface easily generates undercut, overlap, recess and welding deformation etc., or even has stomata and crackle.Application No. is
201621013173.8 Chinese patent application " submersible pump impeller blade Foundry Coated Sand built-up pattern " discloses a kind of diving
Pump impeller blade Foundry Coated Sand built-up pattern, including several mutually isostructural sub-blocks are by location structure positioning convex platform and only
Mouthful, the valve tail of adjacent sub-blocks mutually splices, and Mosaic face is the type chamber that space curved surface forms blade.The step of this method makes sand mold mistake
In many and diverse, precision increases, but brings inconvenience to moulding.Therefore, be not suitable for double shrouded wheel moulding.
Accordingly, it is desirable to provide a kind of be directed to the insufficient improved technology scheme of the above-mentioned prior art.
Summary of the invention
The purpose of the present invention is to provide water-glass sand coremaking moulding mold, tooling and the method for a kind of double shrouded wheel,
When solving current double shrouded wheel moulding, the separation of monoblock type production method apperance is difficult, and impeller precision is low；Assembled preparation
Method and step is cumbersome, is easy to produce defect, the low problem of impeller yield rate.
To achieve the goals above, the invention provides the following technical scheme:
A kind of the water-glass sand coremaking moulding mold and tooling of double shrouded wheel, the moulding mold and tooling include:
Core box, the core box include the upper core box and lower core box that can cover conjunction, and the lower core box is equipped with cylindrical cavity, institute
Upper core box center is stated equipped with through hole, water-glass sand is inserted to core box interior by the through hole, is used to prepare double shrouded wheel
Inner cavity sand core；
Leaf model, the leaf model are detachably connected in the lower core box, the leaf model have it is multiple, in week
Into the cylindrical cavity being arranged in the lower core box；
Model, the model include lower half and upper half model, and the lower half is used to prepare the wheel of double shrouded wheel
Disk moulding, the upper half model are used to prepare the wheel cap moulding of double shrouded wheel and place insulating riser sleeve, the lower half
It is detachably connected with the upper half model；
Sandbox, the sandbox include the drag box and cope that can cover conjunction, and the drag box is for placing lower half, institute
Stating cope is frame structure, and the upper half model is placed in cope, by inserted into the sandbox water-glass sand into
And to wheel disc and wheel cap moulding；
Sprue cup, the sprue cup are arranged in cope, are used to form casting channel, by pouring into casting channel
Potting syrup, casting and forming double shrouded wheel.
In the water-glass sand coremaking moulding mold and tooling of double shrouded wheel as described above, it is preferable that the lower core box
The bottom surface of cylindrical cavity is equipped with first positioning hole, and the leaf model bottom is equipped with corresponding with the location hole the
One positioning pin, first positioning pin are gap-matched with first positioning hole.
In the water-glass sand coremaking moulding mold and tooling of double shrouded wheel as described above, it is preferable that the leaf model
Bottom is set there are two the first positioning pin, and the first positioning hole in the lower core box is adapted with first positioning pin.
In the water-glass sand coremaking moulding mold and tooling of double shrouded wheel as described above, it is preferable that the lower half
It is equipped with second location hole, the upper half model is equipped with the second positioning pin, the second location hole and second positioning pin
It is gap-matched.
In the water-glass sand coremaking moulding mold and tooling of double shrouded wheel as described above, it is preferable that the leaf model
There are six settings, is detachably connected in lower core box in fan blade type arrangement.
In the water-glass sand coremaking moulding mold and tooling of double shrouded wheel as described above, it is preferable that the lower half
Height be less than drag box depth.
In the water-glass sand coremaking moulding mold and tooling of double shrouded wheel as described above, it is preferable that the sprue cup
Height is identical as the height of the cope；The height of the upper half model is less than the height of the cope.
A kind of water-glass sand coremaking formative method of double shrouded wheel, the described method comprises the following steps:
Step S1, coremaking front vane Model Mounting
Leaf model assembly in lower core box and is positioned, upper core box lid is closed in lower core box；
Step S2, prepares sand core
By the water-glass sand being blended from through hole filling core box, water-glass sand is struck off with scraper plate after compacting, to sand
Then core solidification is opened, take out sand core moulding, is finally taken out the leaf model in sand core moulding, is obtained sand core, for use；
Step S3 makes lower sand mold
In the suitable water-glass sand of drag box middle berth, then lower half is placed in drag box, continues to insert water glass
Glass sand is simultaneously compacted, and after being struck off water-glass sand with scraper plate, after sand solidified, obtains lower sand mold；
Step S4, makes sand mold
Upper half model is installed on lower half, is then closed cope lid onto drag box；Sprue cup is placed into
In cope, finally water-glass sand is inserted in cope and is compacted, after being struck off with scraper plate, after sand solidified, by sprue cup
It extracts, forms cast gate cavity, then open cope, take out upper half model, obtain sand mold；
Step S5, repairs running channel
Cross gate is repaired on the surface of lower sand mold, ingate is repaired on the surface of upper sand mold, in the sandbox of Gai Hehou, pours oral cavity
Body passes sequentially through cross gate, ingate is connected to the cavity of upper sand mold, lower sand mold, forms casting channel；Insulating riser sleeve is put
Enter in the cavity that upper sand mold is formed；
Step S6 places mould assembling after sand core
The sand core prepared in step S2 is put into the cavity in lower sand mold, is then closed upper sand mold lid to drag box
On, prepare casting.
In the water-glass sand coremaking formative method of double shrouded wheel as described above, it is preferable that in step sl, by the blade
It further include in lower core box and upper core box internal spray release agent before Model Mounting to the lower core box.
In the water-glass sand coremaking formative method of double shrouded wheel as described above, it is preferable that be equipped with ceramics in the cross gate
Filter screen.
Compared with the immediate prior art, technical solution provided by the invention has following excellent effect:
The double shrouded wheel water-glass sand coremaking moulding mold and tooling that the present invention uses, including upper core box, lower core box, can
Leaf model, model, sandbox, sprue cup and insulating riser sleeve are split, using mold in the present invention and tooling and utilizes waterglass
Sand carries out moulding, can make blade and inner cavity one-pass molding, reduce subsequent soldering processes step, improve the accuracy of manufacture of impeller
With inner cavity cleannes, the high yield rate of impeller manufacture.
Mold in the present invention during coremaking uses detachable leaf model, and simple production process, molding are convenient, behaviour
It facilitates.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.Wherein:
Fig. 1 is the structural schematic diagram of pump closed of embodiment of the present invention impeller；
Fig. 2 is another angled arrangement schematic diagram of pump closed of embodiment of the present invention impeller；
Fig. 3 is the top view of lower core box of the embodiment of the present invention；
Fig. 4 is the connection schematic diagram of leaf model of the embodiment of the present invention and lower core box；
Fig. 5 is the cross-sectional view of upper core box of the embodiment of the present invention and lower core box Gai Hehou；
Fig. 6 is that the embodiment of the present invention takes out sand core modeling structure schematic diagram after leaf model；
Fig. 7 is the lower mold half of the non-back-up sand of the embodiment of the present invention and the positional structure schematic diagram of drag box；
Fig. 8 is that the embodiment of the present invention makes the schematic diagram after lower sand mold back-up sand；
Fig. 9 is that the embodiment of the present invention makes the upper half model of sand mold and the connection schematic diagram of lower half；
Figure 10 is the positional structure schematic diagram for the sprue cup that the embodiment of the present invention makes sand mold；
Figure 11 is that the embodiment of the present invention makes the schematic diagram after the back-up sand of sand mold；
Figure 12 is the structural schematic diagram of cross gate in sand mold under the embodiment of the present invention；
Figure 13 is the structural schematic diagram of ingate in sand mold in the embodiment of the present invention；
Figure 14 is that the embodiment of the present invention places the schematic diagram after sand core in lower sand mold；
The upper sand mold and the cross-sectional view after lower sand mold mould assembling that Figure 15 is the embodiment of the present invention.
In figure: 1, impeller；101, wheel disc；102, wheel cap；103, blade；2, lower core box；3, upper core box；4, the first positioning
Pin；5, first positioning hole；6, lower half；7, upper half model；8, drag box；9, cope；10, sprue cup；1001, oral cavity is poured
Body；11, cross gate；12, foam ceramic filter；13, ingate；14, insulating riser sleeve；15, sand core；16 water-glass sands；17, it is vented
Hole；18, the second positioning pin；19, second location hole；20, leaf model.
Specific embodiment
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.It should be noted that in the feelings not conflicted
Under condition, the feature in embodiment and embodiment in the present invention be can be combined with each other.
In the description of the present invention, term " longitudinal direction ", " transverse direction ", "upper", "lower", "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the present invention rather than require the present invention that must be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.Term used in the present invention " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected,
It may be a detachable connection；It can be directly connected, can also be indirectly connected by intermediate member, for the common of this field
For technical staff, the concrete meaning of above-mentioned term can be understood as the case may be.
According to an embodiment of the invention, the water-glass sand coremaking moulding mold and tooling of a kind of double shrouded wheel are provided,
As depicted in figs. 1 and 2, for using the pump closed of water-glass sand coremaking moulding mold of the invention, tooling and casting and forming
Impeller, double shrouded wheel 1 include blade 103, wheel disc 101 and wheel cap 102.
As shown in Fig. 3 to Figure 15, coremaking moulding mold of the invention and tooling include:
Core box, core box include the upper core box 3 and lower core box 2 that can cover conjunction, and lower core box 2 is equipped with cylindrical cavity, upper core box 3
Center is equipped with through hole, inserts water-glass sand 16 to core box interior by through hole, is used to prepare the inner cavity sand of double shrouded wheel 1
Core.
Leaf model 20, leaf model 20 are detachably connected in lower core box 2, leaf model 20 have it is multiple, in circumferential row
Cloth is in the cylindrical cavity in lower core box 2；The bottom surface of the cylindrical cavity of lower core box 2 is equipped with first positioning hole 5, leaf
20 bottom of piece model is equipped with the first positioning pin 4, and the first positioning pin 4 is gap-matched with first positioning hole 5, for the ease of combination
And disassembly, the first positioning pin 4 and first positioning hole 5 are gap-matched in the present invention, and gap is 0.05~0.1mm.The present invention
Specific embodiment in, there are six leaf models 20, and there are two the settings of positioning pin on each leaf model 20, each blade mould
Two first positioning holes 5 in the corresponding lower core box 2 of two the first positioning pins 4 in type 20, first positioning hole 5 and the first positioning pin
4 are adapted, and leaf model 20 is fixed in lower core box 2 in fan blade type arrangement, pin and the cooperation in hole for leaf model 20 into
Row positioning.The height of leaf model 20 is identical as the depth of the cylindrical cavity of lower core box 2, in the sand core 15 that can make preparation
The cavity that leaf model 20 is formed runs through the upper and lower surface of sand core 15, it is ensured that potting syrup can smoothly enter into leaf model when the later period is poured
In 20 cavity bodies formed, and the potting syrup of 15 top of sand core is made to enter sand core 15 by the cavity of leaf model 20 in sand core 15
In the cavity formed between lower sand mold.Every leaf model 20 is detachable, 103 lower end of blade and 2 junction two of lower core box
Side is set as arc structure, i.e. 20 lower end two sides of leaf model and 2 junction of lower core box are equipped with circular arc type chamfering, after guaranteeing casting
The blade 103 of formation and being smoothly connected for 102 junction of wheel cap reduce the internal stress of impeller 1.
Model, model include lower half 6 and upper half model 7, and lower half 6 is used to prepare the wheel disc 101 of double shrouded wheel 1
Moulding, upper half model 7 are used to prepare 102 moulding of wheel cap of double shrouded wheel 1 and place insulating riser sleeve 14,6 He of lower half
Upper half model 7 is detachably connected；In specific embodiments of the present invention, lower half 6 is equipped with second location hole 19, upper half model
7 are equipped with the second positioning pin 18, and second location hole 19 and the second positioning pin 18 are gap-matched, and gap is 0.1~0.2mm,
For the positioning of upper half model 7 and lower half 6, it is convenient for 16 moulding of water-glass sand.
In specific embodiments of the present invention, upper half model 7 and lower half 6 are wooden form.
Upper half model 7 includes the cylindrical body on top and the disc of lower part, after 16 moulding of water-glass sand, upper half model
After 7 take out, the inner space of cylindrical body is for placing insulating riser sleeve 14 in the upper sand mold of formation.
Sandbox, sandbox include the drag box 8 and cope 9 that can cover conjunction, and drag box 8 is for placing lower half 6, cope
9 be frame structure, and upper half model 7 is placed in the cope 9 of Gai Hehou, right respectively by inserting water-glass sand 16 into sandbox
102 moulding of wheel disc 101 and wheel cap；In specific embodiments of the present invention, the height of lower half 6 is less than the depth of drag box 8；On
The height of half model 7 is less than the height of cope 9；The height of cope 9 is identical as the height of sprue cup 10；In casting process,
In addition to 10 top of sprue cup, remaining position is intended to keep certain mold thickness in sandbox, usual minimum 50mm, i.e. upper mold section
Type 7 and lower half 6 are not less than 50mm at a distance from corresponding sand mold boundary, avoid causing potting syrup to seep since mold thickness is too small
Sand mold is leaked out, by taking the orientation in Figure 10 and 11 as an example, upper half model 7 and lower half 6 combine (i.e. upper half model 7 and female die
Type 6 is cooperatively connected by second location hole 19 and the second positioning pin 18) after, be formed by revolving body edge and cope 9 or
The left edge of drag box 8, leading edge, back edge minimum range be not less than 50mm；The right hand edge and cope 9 of sprue cup 10
Or the distance of the right hand edge of drag box 8 is not less than 50mm；The distance of bottom of the bottom surface of lower half 6 apart from drag box 8 is not small
In 50mm.
Sprue cup 10, sprue cup 10 are arranged in cope 9, are used to form casting channel, by filling into casting channel
Enter potting syrup, one-pass molding double shrouded wheel 1.The disc edge appropriate location of upper half model 7 is arranged in sprue cup 10.
The present invention also provides a kind of 16 coremaking formative methods of water-glass sand of double shrouded wheel 1, comprising the following steps:
Step S1, coremaking front vane model 20 assemble
As shown in Figures 3 to 5, the assembly of leaf model 20 is first carried out before coremaking, first in lower core box 2 and upper core box 3
Internal spray release agent, then by six assembly of leaf model 20 in lower core box 2, and it is fixed using first on leaf model 20
First positioning hole 5 on position pin 4 and lower core box 2 is positioned, and is closed in lower core box 2 lid of upper core box 3 after assembly, is prepared
Coremaking.
Step S2 prepares sand core 15
By the water-glass sand 16 being blended from the through hole of upper core box 3 filling core box, with scraper plate by waterglass after compacting
Sand 16 strikes off, and is then inserted into hollow metal tube in sand core 15 and blows CO2Half a minute is opened after the solidification of sand core 15, takes core away
Box 3 then takes out 15 moulding of sand core from lower core box 2, and sand core 15 overturns 180 °, and six leaves are finally extracted from 15 moulding of sand core
Piece model 20 forms the sand core 15 for having 103 cavity of blade, obtains sand core 15 as shown in FIG. 6, the sand core 15 prepared is put
It is stand-by on stooling plate.
Step S3 makes lower sand mold
As shown in Figure 7 and Figure 8, then lower half 6 is placed in the suitable water-glass sand 16 of 8 middle berth of drag box first
In drag box 8, continues the water-glass sand 16 that filling has been blended and be compacted, adjust the orientation of lower half 6, make lower half 6
Upper surface it is concordant with the upper edge of drag box 8；After water-glass sand 16 is struck off with scraper plate, the sand face of water-glass sand 16 and lower half
The upper surface of model 6 is concordant, and hollow metal tube is inserted into sand mold and blows CO2Half a minute makes sand solidified, obtains lower sand mold.
Step S4, makes sand mold
As shown in Figures 9 to 11, upper half model 7 is installed on lower half 6, utilizes the second of 7 bottom of upper half model
The second location hole 19 at 6 top of positioning pin 18 and lower half, which positions, fixes, and then closes the lid of cope 9 onto drag box 8；It will
Sprue cup 10 is placed into inside cope 9, and disc edge suitable distance of the sprue cup 10 apart from upper half model 7 will finally mix
The water-glass sand 16 made is inserted in cope 9 and is compacted, and after being struck off with scraper plate, is inserted into hollow metal tube in sand mold and is blown CO2
Half a minute makes sand solidified；Then sprue cup 10 is extracted, cast gate cavity 1001 is formed, then unpacks, overturning cope 9 takes
Upper half model 7 out further takes out the lower half 6 in the sand mold of drag box 8；The top surface of upper sand mold is to having from cope 9
Gas vent 17, gas vent 17 are connected to insulating riser sleeve 14, and gas vent 17 becomes the exhaust passage of insulating riser sleeve 14, are obtained
Sand mold.Step S5, repairs running channel
As shown in Figure 12 and Figure 13, cross gate 11 is repaired in the upper surface of the lower sand mold in drag box 8, and cross gate 11 is in circular arc
Shape groove is equipped with foam ceramic filter 12, for filtering potting syrup, the lower surface of the upper sand mold in cope 9 in cross gate 11
Ingate 13 is repaired, ingate 13 extends outwardly from the inner chamber body that upper half model 7 is formed, in the sandbox of Gai Hehou, cast gate
Cavity 1001 passes sequentially through cross gate 11, ingate 13 is connected to the cavity of upper sand mold, lower sand mold, forms casting channel；It will protect
Adhesive glue in warm 14 top coating of riser buss is then placed in the cavity of the formation of upper half model 7.
In specific embodiments of the present invention, the position between sprue cup 10 and upper half model 7 should meet, 10 bottom of sprue cup
Cross gate 11 outer arc at a distance from 15 outer circle of sand core be 25mm, be easy to cause ingate premature solidification apart from excessive,
It is low that undersized sand mold herein is easy burning, intensity；Certainly in other embodiments, the tune of distance can be carried out according to casting size
Whole, this is not limited by the present invention.
Step S6 places mould assembling after sand core 15
As shown in Figure 14 and Figure 15, the sand core 15 prepared in step S2 is put into drag box 8, then covers cope 9
It closes on drag box 8, prepares casting, the disc of upper half model 7 is used to form the wheel cap 102 of impeller 1, sand core 15 and lower sand mold
Between gap cavity be used to form the wheel disc 101 of impeller 1,103 cavity of blade of sand core 15 is used to form blade 103.Into
When row casting, the cast gate cavity 1001 that potting syrup is formed after the extraction of sprue cup 10 enters, after the filtering of foam ceramic filter 12
Potting syrup flow into cross gate 11 and then from ingate 13 flow to cavity moulding.
Demoulding is carried out after moulding by casting, obtains pump closed impeller 1.
The 16 coremaking moulding mould of water-glass sand and tooling of double shrouded wheel 1 of the invention mainly include upper core box 3, lower core box
2, detachable leaf model 20, model, sandbox, sprue cup 10 and insulating riser sleeve 14 are carrying out water pump leaf using mold tooling
Moulding is carried out using water-glass sand 16 when taking turns 1 moulding, is the preparation of sand core 15 first, leaf model 20 is assembled to lower core box 2
On, it is then injected into water-glass sand 16, again takes out leaf model 20 after 15 moulding of sand core solidification, the preparation of sand core 15 is completed；Secondly
The lower sand mold of wheel disc 101 is prepared using lower half 6 and drag box 8；Wheel cap is prepared using upper half model 7 and cope 9 again
102 and sprue gate upper sand mold；Then upper half model 7, lower half 6 and sprue cup 10, In are taken out from the sand mold after solidification
The inner surface of upper sand mold and lower sand mold repairs cross gate 11 and ingate 13, and liquid flows into inside moulding when for being poured；Finally will
Insulating riser sleeve 14 is put into the cavity in sand mold, can start casting process after upper sand mold and lower sand mold mould assembling.
In conclusion the manufacture carried out in the present invention using the water-glass sand coremaking moulding mould of double shrouded wheel and tooling
Method can be such that blade and inner cavity one-step casting forms, reduce subsequent soldering processes step, improve impeller the accuracy of manufacture and
Inner cavity cleannes, the high yield rate of impeller manufacture.The mold in the present invention during coremaking uses detachable blade mould simultaneously
Type, simple production process, molding are convenient, operate conveniently.
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. the water-glass sand coremaking moulding mold and tooling of a kind of double shrouded wheel, which is characterized in that the moulding mold and
Tooling includes:
Core box, the core box include the upper core box and lower core box that can cover conjunction, and the lower core box is equipped with cylindrical cavity, it is described on
Core box center is equipped with through hole, inserts water-glass sand to core box interior by the through hole, is used to prepare the interior of double shrouded wheel
Chamber sand core；
Leaf model, the leaf model are detachably connected in the lower core box, the leaf model have it is multiple, in circumferential row
Cloth is in the cylindrical cavity in the lower core box；
Model, the model include lower half and upper half model, and the wheel disc that the lower half is used to prepare double shrouded wheel is made
Type, the upper half model are used to prepare the wheel cap moulding of double shrouded wheel and place insulating riser sleeve, the lower half and institute
Upper half model is stated to be detachably connected；
Sandbox, the sandbox include the drag box and cope that can cover conjunction, and the lower half is placed in drag box, it is described on
Half model is placed in cope, to wheel disc and wheel cap moulding and then inserting water-glass sand into the sandbox；
Sprue cup, the sprue cup are arranged in cope, are used to form casting channel, are poured by injecting into casting channel
Liquid, casting and forming double shrouded wheel.
2. the water-glass sand coremaking moulding mold and tooling of double shrouded wheel as described in claim 1, which is characterized in that described
The bottom surface of the cylindrical cavity of lower core box is equipped with first positioning hole, and the leaf model bottom is equipped with and the location hole phase
Corresponding first positioning pin, first positioning pin are gap-matched with first positioning hole.
3. the water-glass sand coremaking moulding mold and tooling of double shrouded wheel as claimed in claim 2, which is characterized in that described
Leaf model bottom is set there are two the first positioning pin, and the first positioning hole in the lower core box is mutually fitted with first positioning pin
Match.
4. the water-glass sand coremaking moulding mold and tooling of double shrouded wheel as described in claim 1, which is characterized in that described
Lower half is equipped with second location hole, and the upper half model is equipped with the second positioning pin, the second location hole and described the
Two positioning pins are gap-matched.
5. the water-glass sand coremaking moulding mold and tooling of double shrouded wheel as described in claim 1, which is characterized in that described
There are six leaf model settings, is detachably connected in lower core box in fan blade type arrangement.
6. the water-glass sand coremaking moulding mold and tooling of double shrouded wheel as described in claim 1, which is characterized in that described
The height of lower half is less than the depth of drag box.
7. the water-glass sand coremaking moulding mold and tooling of double shrouded wheel as described in claim 1, which is characterized in that described
The height of sprue cup is identical as the height of the cope；The height of the upper half model is less than the height of the cope.
8. a kind of water-glass sand coremaking formative method of double shrouded wheel as described in claim 1~7 is any, which is characterized in that
The formative method the following steps are included:
Step S1, coremaking front vane Model Mounting
Leaf model assembly in lower core box and is positioned, upper core box lid is closed in lower core box；
Step S2, prepares sand core
By the water-glass sand being blended from through hole filling core box, water-glass sand is struck off with scraper plate after compacting, it is solid to sand core
Change and be then opened, take out sand core moulding, finally the leaf model in sand core moulding is taken out, obtains sand core, for use；
Step S3 makes lower sand mold
In the suitable water-glass sand of drag box middle berth, then lower half is placed in drag box, continues to insert water-glass sand
And be compacted, after water-glass sand being struck off with scraper plate, after sand solidified, obtain lower sand mold；
Step S4, makes sand mold
Upper half model is installed on lower half, is then closed cope lid onto drag box；Sprue cup is placed into upper sand
In case, finally water-glass sand is inserted in cope and is compacted, is struck off, after sand solidified, sprue cup is extracted, shape with scraper plate
At cast gate cavity, cope is then opened, upper half model is taken out, obtains sand mold；
Step S5, repairs running channel
Repair cross gate on the surface of lower sand mold, repair ingate on the surface of upper sand mold, in the sandbox of Gai Hehou, cast gate cavity according to
It is secondary to be connected to by cross gate, ingate with the cavity of upper sand mold, lower sand mold, form casting channel；Insulating riser sleeve is put into
In the cavity that sand mold is formed；
Step S6 places mould assembling after sand core
The sand core prepared in step S2 is put into the cavity in lower sand mold, is then closed upper sand mold lid onto drag box,
Prepare casting.
9. the water-glass sand coremaking formative method of double shrouded wheel as claimed in claim 8, which is characterized in that in step sl,
It further includes in lower core box and upper core box internal spray release agent that the leaf model, which is assembled to before the lower core box,.
10. the water-glass sand coremaking formative method of double shrouded wheel as claimed in claim 8, which is characterized in that the cross gate
In be equipped with foam ceramic filter.
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| CN201910832813.XA CN110434282B (en) | 2019-09-04 | 2019-09-04 | Mold, tooling and method for core molding of closed impeller sodium silicate sand |
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| CN201910832813.XA CN110434282B (en) | 2019-09-04 | 2019-09-04 | Mold, tooling and method for core molding of closed impeller sodium silicate sand |
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| CN111069539A (en) * | 2019-12-24 | 2020-04-28 | 河北工业职业技术学院 | Casting process of impeller of large dredge pump |
| CN111644577A (en) * | 2020-06-12 | 2020-09-11 | 内蒙古第一机械集团股份有限公司 | Casting method for moving wheel and fixed wheel of comprehensive transmission system of tracked vehicle |
| CN111774529A (en) * | 2020-07-03 | 2020-10-16 | 浙江汉声精密机械有限公司 | Manufacturing method of large valve plate |
| CN113953445A (en) * | 2021-10-11 | 2022-01-21 | 甘肃酒钢集团西部重工股份有限公司 | Device and method for producing bidirectional pump impeller by 3DP sand mold printing technology |
| CN117798343A (en) * | 2024-03-01 | 2024-04-02 | 成都新航工业科技股份有限公司 | Closed impeller shell forming die |
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| CN110434282B (en) | 2023-08-18 |
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