CN209424486U - A kind of casting sand mould of herbage collecting mechanical arc needle - Google Patents
A kind of casting sand mould of herbage collecting mechanical arc needle Download PDFInfo
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- CN209424486U CN209424486U CN201821891219.5U CN201821891219U CN209424486U CN 209424486 U CN209424486 U CN 209424486U CN 201821891219 U CN201821891219 U CN 201821891219U CN 209424486 U CN209424486 U CN 209424486U
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Abstract
The casting sand mould that the utility model provides a kind of herbage collecting mechanical arc needle includes shell, and the upper housing is arcuate structure, and the arcuate structure is equipped with the first sprue, and first sprue is communicated with the pouring cup of storage potting syrup；Lower case, the lower case are to be equipped with the matched arcuate structure of the upper housing, the lower case and the described first main running channel corresponding position and run through the main running channel of lower case upper and lower ends second；After the upper housing and lower case fasten, at least one type chamber is formed, the type chamber is arc, and first sprue and the second sprue are communicated with the type chamber, forms arc needle casting after the type chamber casting；Core assembly, the core assembly is intracavitary set on type, forms arc needle casting for secondary cavity.The utility model is changed to stack-type from stack-type, while increasing subsidy channel, when casting, reduces sand using amount, improve yield rate by changing sand mold shape.
Description
Technical field
The utility model relates to handwheel manufacture production field more particularly to a kind of casting of herbage collecting mechanical arc needle
Sand mold.
Background technique
Precoated sand casting technique is one kind of the resin sand in sand casting, the casting manufactured using precoated sand casting technique
Small with surface roughness, dimensional accuracy is high, the good feature of quality.
In the prior art, arc needle technique is precoated sand stack-type, i.e. sand mold two sides is all apperance, referring to shown in attached drawing 1-4,
It is mainly horizontal parting, vertically penetrates sand, and apperance Inner arc is opposite to put, and an intermediate sprue gives that two arcs are horizontal to be poured
Road, two arc cross gates are moved towards with two apperance inner arcs, and cross gate is connected with casting by four ingates, and ingate is in interior
Arc middle position, external arc guide groove and thimble stomidium are formed by fuse.Due to being stack-type structure, sand mold is thicker, during shell processed is
Between precoated sand be not easy to solidify, the time that causes to be heating and curing is longer, power-consuming, and intensity is low；Sand using amount is big, and (placer iron ratio is greater than
5.2), at high cost, sand mold weight is big, about 31.4Kg, operative employee's large labor intensity when leading to shell processed and installing additional, shell processed and installation
Low efficiency.Meanwhile mo(u)ld top half sand mold is penetrated not firm, and sand mold is caused to need to repair too many, increasing cost reduces efficiency, have an effect on casting at
Product rate.External arc guide groove and pin hole are made of a whole fuse, and fuse is longer, are easily broken off and penetrate not firm, fuse yield rate
It is low.Running gate system is made of two arc cross gates and secondary cross gate, a sprue and four ingates, running gate system iron
Water is big, causes product yield low, higher cost.
In traditional handicraft, arc needle is produced using stack-type technique, and a stack-type sand mold upper and lower surface all has forming cavity,
Complete cast molding chamber is formed after the cooperation of every two sand mold, each cast molding chamber can make two arc needles；Wherein lead
Running channel is set to the center of sand mold, the arc cross gate of two sides is flowed to by sprue, then by four equidistant on arc cross gate
Ingate flows to cast molding chamber.
The design of above-mentioned running channel allows for the shape and structure of arc needle, if directly casting from both ends, casting
The dynamic distance of liquid stream, temperature difference is big, and carrying out feeding when feeding not in time, causes casting molding bad.
Above-mentioned sand mold design has no the problem in principle when casting of metals, but the size of visible sand mold is larger,
The ratio of running channel and cast molding chamber is big, first is that placer iron is than big, raw material dosage is big, second is that sand mold size is big, needs when making sand mold
Will bigger energy consumption solidified, while being easy to appear and penetrating the not firm problem of sand, third is that running channel volume is big, waste more.
In second point in the above problem, sand mold size is big, and sand mold production qualification rate is low, after the sightless defect of naked eyes
It will lead to that casting quality is bad the phase, furthermore the requirement of energy consumption and peripheral equipment is high；In the above problem thirdly in, running channel
Volume is big, and casting liquid waste is more, at high cost.
For problem of the prior art, it is desirable to by propose the sand mold sand mold of a kind of combination stack-type technique and shell mold technical operation come
Solve above-mentioned two problems.
Utility model content
The purpose of this utility model is to provide a kind of reduction sand mold sizes, optimization running channel design, reach the sand mold system of raising
Make yields, improve casting quality, lowers running channel volume, reduce cost
To achieve the goals above, the use following technical scheme of the utility model is achieved:
A kind of casting sand mould of herbage collecting mechanical arc needle, comprising:
Upper housing, the upper housing are arcuate structure, and the arcuate structure, which is equipped with, runs through the upper housing upper and lower ends
The first sprue, first sprue with storage potting syrup pouring cup communicate；
Lower case, the lower case are and the matched arcuate structure of the upper housing, the lower case and first master
Running channel corresponding position, which is equipped with, runs through the main running channel of lower case upper and lower ends second；
After the upper housing and lower case fasten, at least one type chamber is formed, the type chamber is arc, and described first directly pours
Road and the second sprue are communicated with the type chamber, form arc needle casting after the type chamber casting；
Core assembly, the width of the core assembly is less than the width of the type chamber, and the core assembly is set to type chamber
It is interior, arc needle casting is formed for secondary cavity.
Further, the type chamber is made up of the lower case, is provided with along the radian direction of the lower case and institute
The cross gate of arc is stated, the cross gate is communicated with second sprue, and the two sides of the cross gate are respectively equipped with structure phase
With type chamber group, the type chamber group includes the parallel type chamber of several camber lines, each type chamber with the cross gate phase
It is logical.In the present solution, after being changed to shell mould, using lower case as the forming cavity of casting, upper housing is the sand mold back side, avoids that penetrate sand not firm
Defect, even if having once in a while penetrate the not firm situation of sand only overleaf, not in apperance face, do not influence casting, significantly improve sand mold
With the yield rate of casting；And at least two type chamber is formed directly in lower case, it can once be poured at least two casting, efficiency
It is high.
Further, the cross gate is equipped with several sprue gates, the two sides at each sprue gate and close cross gate
The type chamber of two sides is connected to.By increasing ingate, casting efficiency is improved, while ingate can will be with cross gate apart from farther away
Type chamber is poured.
It further, further include subsidy channel, the subsidy channel is located at ingate end, and close to the lower case of arc
The center of circle direction setting.When casting, the type chamber close to center of circle direction is relatively thin, and potting syrup flowing is slower, and inflow is few, passes through subsidy
The defects of channel, inflow increase, cold shut solves.
Further, the subsidy channel is hierarchic structure, and the hierarchic structure includes several flights.Ladder-like knot
Structure, molten iron flow into lower from eminence transition, and subsidy effect is good, and by step-like structure, can fill and lead up casting weight loss groove,
Increase iron water amount.
Further, the core assembly includes the first fuse, the second fuse and third fuse, and first fuse is set
In one end of the type chamber of arc, second fuse connect the fuse to form arc with third fuse, and it is intracavitary to be placed in type, and described
Two fuse ends are equipped with columnar projections, and the columnar projections are placed in the other end of the type chamber of the arc.For matching product
Structure increases core assembly；In the prior art, arc fuse is one, in the present solution, fuse is become two from one, energy
High yield rate when fuse production is enough improved, not easy to break, fuse is short, penetrates sand reality.
Further, second fuse end is equipped with boss, and one end that the third fuse is connect with the second fuse is set
There is the shrinkage pool with boss cooperation, when second fuse is connect with third fuse, the boss is inserted into the shrinkage pool.Pass through
Boss is connect with shrinkage pool, it is ensured that the formation of arc fuse.
The beneficial effects of the utility model are as follows:
In the utility model, since upper housing is matched with the arc of lower case, i.e. the bending direction of the two is identical, from before
Inverse-arc shape, be changed to arc in the same direction, reduce the volume of running channel, potting syrup flow distance is short, and temperature difference is big, can mend in time
Contracting improves casting ratio of briquetting.
In the utility model, casting sand mold is changed to shell mould from stack-type, reduces sand ratio, and the thickness of casting sand mold is reduced, old sand
The maximum gauge of type is 67.7mm, and the maximum gauge of shell sand type is 12mm after improving, and reduces sand using amount, improves casting effect
Rate.
In the utility model, potting syrup is directly entered the type chamber of arc by sprue, and needs to pass through in the prior art
Arc cross gate, secondary cross gate, ingate etc. are compared, and potting syrup circulation path is short, and circulation is fast, and iron water amount is few, and yield rate is high.
Detailed description of the invention
Fig. 1 is a kind of this structural schematic diagram of the sand mold of herbage collecting mechanical arc needle in the prior art；
Fig. 2 is one of assembling figure of sand mold of the prior art；
Fig. 3 is the two of the assembling figure of the sand mold of the prior art；
Fig. 4 is the three of the assembling figure of the sand mold of the prior art；
Fig. 5 is a kind of structural schematic diagram of the casting sand mould of herbage collecting mechanical arc needle provided by the utility model；
Fig. 6 is one of the structural schematic diagram of upper housing provided by the utility model；
Fig. 7 is the second structural representation of upper housing provided by the utility model；
Fig. 8 is one of the structural schematic diagram of lower case provided by the utility model；
Fig. 9 is the second structural representation of lower case provided by the utility model；
Figure 10 is the structural schematic diagram of fuse provided by the utility model；
Figure 11 is the top view of the second fuse provided by the invention；
In figure: 1, upper housing；2, lower case；3, core assembly；301, the first fuse；302, the second fuse；303, third
Fuse；4, the first sprue；5, the second sprue；6, type chamber；7, ingate；8, channel is subsidized；9, cross gate；10, boss；
11, shrinkage pool；12, column is fastened；13, buckling groove；14, supporting rib；15, lightening recesses；16, positioning convex platform；17, positioning groove；18,
Core print；19, core platform；
100, sand mold；200, sprue；300, secondary cross gate；400, arc cross gate.
Specific embodiment
Reach the technical means and efficacy that predetermined purpose is taken for the utility model is further described, below in conjunction with attached drawing
And embodiment, to specific embodiment of the present utility model, structure feature and its effect, detailed description are as follows.
Embodiment 1
Referring to shown in attached drawing 5-11, the casting sand mould of one of the present embodiment herbage collecting mechanical arc needle, including
Upper housing 1, lower case 2 and core assembly 3, specifically, due to the change of arc needle construction, core assembly 3 is used in type chamber
Certain a part that interior supplement shape forming cavity cannot be formed.Referring to the upper casing shown in attached drawing 6-7 it is found that specifically, in the present embodiment
Body 1 is arcuate structure, and the arcuate structure decurvation, certainly, being bent downwardly is that in contrast, can also be bent upwards,
The curvature of shell is determined according to the curvature of arc needle.In the present embodiment, in the middle position of arcuate structure, setting first is straight
Running channel 4, the first sprue 4 run through the upper and lower ends of upper housing 1, and the pouring cup phase of the first sprue 4 and storage potting syrup
It is logical；
It is found that the lower case 2 of the present embodiment is and the matched arcuate structure of upper housing 1, this implementation referring to shown in attached drawing 8-9
In example, i.e., lower case 2 is also decurvation, while directly being poured in lower case 2 with 4 corresponding position of the first sprue setting second
Road 5, the second sprue 5 runs through the upper and lower ends of lower case 2, when casting, blocks 5 lower part of the second sprue, carries out potting syrup
Flowing.In the present embodiment, after upper housing 1 and the fastening of lower case 2, at least type chamber 6 is formed, it is matched that type chamber 6 is located at arc needle
Arcuate structure, first sprue 4 and the second sprue 5 are communicated with the type chamber 6, and type chamber 6 forms arc after being poured
Needle casting；
Referring to shown in attached drawing 5, in the present embodiment, for fitting-type chamber 6, it is additionally provided with core assembly 3, the core assembly 3
Width be less than the type chamber 6 width, and core assembly 3 be set to type chamber 6 in, for secondary cavity 6 formed arc needle casting
Part.In the present embodiment, for example arc needle casting needs pin hole, then a cylindricality component in core assembly 3 is needed to be placed in type chamber 6
One end is formed, and it is poroid when taking away cylindricality component that potting syrup gets around cylindricality component herein；And work as the centre of arc needle casting
When position is equipped with arc groove body, curved components are set in the core assembly 3 in the present embodiment, are placed in type chamber 6, after casting,
Curved components are taken away, and since remaining position through potting syrup forms casting in type chamber 6, therefore the position of curved components are placed in type chamber 6,
Potting syrup is not entered into, then forms arc groove body.
In the present embodiment, the formation of type chamber 6 has Three models:
The first, is directly formed by the lower part of upper housing 1, when casting, passes through the first sprue 4 and the second sprue 5
The type chamber 6 on upper housing 1 is poured simultaneously, cooperates core assembly 3, forms arc needle casting；
It second, is formed by the top of lower case 2, is then same by the first sprue 4 and the second sprue 5 at this time
When the type chamber 6 in lower case 2 is poured.
The third, is collectively formed by upper housing 1 and lower case 2, i.e. a part of lower part for being located at upper housing 1 of type chamber 6,
A part be located at lower case 2 top, the two fasten, form complete type chamber 6, at this time potting syrup by the first sprue 4 with
And common realize of the second sprue 5 is poured, and cooperates core assembly 3, forms arc needle casting.
In the present embodiment, the maximum gauge of core assembly 3 is 10mm-14mm, and in the prior art with a thickness of 29.8mm phase
Than thickness is substantially reduced.
Embodiment 2
As the further improvement of above-described embodiment, in the present embodiment, referring to shown in attached drawing 8-9, type chamber 6 passes through lower case
2 are constituted, and specifically, the radian direction of the lower case 2 are provided with the cross gate 9 with arc, and cross gate 9 and described second
Sprue 5 communicates, and in the two sides of cross gate 9, is respectively equipped with the identical type chamber group of structure, specifically, if each type chamber group includes
The parallel type chamber 6 of dry camber line；Each type chamber 6 is communicated with the cross gate 9.I.e. potting syrup passes through cross gate 9, while flowing into two
In the type chamber group of side, it can be poured two groups of type chamber groups simultaneously, and each type chamber group may include several type chambers 6, Jin Erke
To be poured multiple casting simultaneously.
Preferably, the present embodiment summarizes, and each type chamber group includes 1 type chamber 6, it can while being poured and to form 2 casting.
Since shell structure is arc, the influence factors such as thickness of two sides height are more, therefore too many type chamber 6 is arranged in each type chamber group, then
It is easy to cause and pours between the product outpoured, since potting syrup flowing velocity, flow etc. influence, so that difference is big.
In the present embodiment, referring to shown in attached drawing 8, type chamber 6 is two, and several ingates 7 are then equipped on cross gate 9,
The two sides of each ingate 7 are connect with two type chambers 6.
When type chamber 6 is multiple, ingate 7 is connected to the type chamber 6 of close 9 two sides of cross gate, can be between multiple type chambers 6
It is attached by auxiliary ingate or connecting groove etc., for example between flat type chamber 6, passes through groove structure normal thereto
Connection realizes the flowing of potting syrup.In the present embodiment, potting syrup flows to the type chamber 6 of two sides by cross gate 9 simultaneously, and multiple
Ingate 7 flows simultaneously, and poring rate is very fast.
It further include subsidy channel 8 in the present embodiment, specifically, subsidy channel 8 is located at 7 end of ingate, and close to arc
Lower case 2 the center of circle direction setting.For lower case 2, at the direction of the center of circle, sand mold thickness cannot be too thick, otherwise
It is easy to influence structural strength, but when sand mold is thinning, inflow is less than normal, meanwhile, ingate 7 is not easy to pacify at the direction of the center of circle
It puts, the serious circulation for hindering molten iron, and after increasing subsidy channel 8, molten iron velocity of liquid assets can be improved, increase iron water amount,
Ensure the casting of internal cavity 6.
In the present embodiment, subsidy channel 8 is hierarchic structure, and specifically, hierarchic structure includes several flights.I.e. molten iron from
At ingate 7, by flight one by one, into the type chamber 6 at the inner position of arc, molten iron flow is fast, and casting effect is good.
In the present embodiment, the increase in channel 8 is subsidized, the inlet of potting syrup is increased, solves the defects of cold shut.Specifically
Ground, the generation of cold shut are since molten iron is in cavity filling process, temperature is low, running gate system size it is less than normal cause flow is small, fill type speed
Casting flaw caused by low reason is spent, increases subsidy channel 8 and is equivalent to increasing running gate system size, enter type to improve molten iron
Flow and flow rate when chamber improves filling velocity, avoids the drawbacks described above of casting.
It in the present embodiment, subsidizes in channel 8, it is highly 8 ± 2mm that the width in each channel, which is 45 ± 5mm,；I.e. each rank
Terraced slice width degree is 45mm or so, is highly 8mm or so.
In the present embodiment, supporting rib 14, a upper housing 1 and a lower casing can also be equipped in the lower surface of lower case 2
The assembling of body 2 forms one group of sand mold component, if mainly gravity etc. is born in the lower surface of lower case 2 when dry sand mold component stacks,
And supporting rib 14 can assist lower case 2, be used to support institute's sand mold component.
In the present embodiment, it can also increase in the upper surface of lower case 2 and fasten column 12, while in the lower surface of upper housing 1
Corresponding position, setting and the fastening matched buckling groove 13 of column 12.By fastening the matching of column 12 and buckling groove 13, realize
When lower casing body running, the compactness of connection.
In the present embodiment, after being changed to shell mould, lower die is apperance, and upper mold is the sand mold back side and supporting rib, it is not easy to be penetrated
Not firm defect has penetrate the not firm situation of sand only overleaf once in a while, not in apperance face, does not influence casting, improves sand mold and casting
Yield rate.
In the present embodiment, in 2 sand mold of upper housing 1 and lower case, maximum gauge 12mm, and stack-type sand mold in the prior art
In, sand mold maximum gauge is 67.7mm, and sand mold is heavy, and sand using amount is big, and when casting, thickness is excessive, and there are potting syrup flowings slowly,
It radiates the defects of slow.
Embodiment 3
As the further improvement of Examples 1 and 2, arc needle is arcuate structure in the present embodiment, and the two sides of arc are divided
Not She You pin hole, the conductor rope slot structure of the side setting arc of arc, at this point, the structure in order to cooperate arc needle, referring to attached drawing
Shown in 10, core assembly 3 includes the first fuse 301, the second fuse 302 and third fuse 303, when placement, the first fuse 301
It is placed in one end of the type chamber 6 of arc, is used to form a pin hole of arc needle；Second fuse 302 is connect with third fuse 303
The fuse for forming arc, is placed in type chamber 6, and the specific side by plesiotype chamber 6 is placed, and when casting, will not be poured the fuse of arc,
And then the conductor rope slot structure of arc needle side can be formed；Columnar projections are arranged in second fuse, 302 end, columnar projections are placed in
The other end of the type chamber 6 of the arc is used to form another pin hole of arc needle.
In the present embodiment, when core assembly 3 is placed, it is fixed in type chamber 6.Specifically, the first fuse in fuse
301, it is equipped with positioning convex platform 16 on the second fuse 302 and third fuse 303, and in type chamber 6, position of being corresponding to it, setting
Have positioning groove 17 (mainly in lower case 2), positioning convex platform 16 and 17 matches mutually of positioning groove carry out core assembly 3
It is fixed.
In the present embodiment, core print 18 is equipped with also in fuse external arc；It can referring to the top view of 11 second fuse 302 of attached drawing
Know, the thickness of core print 18 is about 6mm, and height is about 50.74mm, and arc chord length is 487.53mm, arc length 788.79rad；Second
The thickness of fuse 302 is about 12.07mm；Core print 18 is the structure of protrusion, due to the first fuse 301 and third fuse 303
On core print 18 it is consistent with the core head structure on the second fuse 302, therefore be not repeated.In the present embodiment, core platform 19 and core print 18
Size matching, core platform 19 is sunk on sand mold, and core print 18 then protrudes on core assembly 3, is specifically as follows
The structures such as cylindrical body, tetragonal body cooperate with core platform 19, fixed core assembly 3.
In the present embodiment, core print 18 is located at 302 outer circle of the second fuse about 2/3, the end of the first fuse 301 and third
Fuse 303 is placed in close to the end of the first fuse 301 in the lower surface of upper housing 1 and the upper surface setting of lower case 2
On the core platform 19 of sand mold, after upper-lower casing mould assembly, about 19 core platform clamps core print 18, ensure that fuse will not shift, floating, i.e.,
It will not be washed away by molten iron.
Referring to shown in attached drawing 10, in the present embodiment, be equipped with shrinkage pool 11 in 302 end of the second fuse, third fuse 303 with
One end of second fuse 302 connection is equipped with the boss 10 cooperated with shrinkage pool 11, when the second fuse 302 is connect with third fuse 303
When forming arc fuse, boss 10 is inserted into the shrinkage pool 11.By the structure of boss 10 and shrinkage pool 11, the company of fuse is facilitated
It connects.
In the present embodiment, the fuse of arc is collectively formed with third fuse 303 by the second fuse 302, with sand mold before
In entire fuse compare, fuse is interrupted several sections, increases fuse intensity, fuse is not easy to break and penetrates not firm, fuse production
In, high yield rate.
In the present embodiment, by the way that whole core is adjusted to two core splices, and it is thinned, subtracts narrow, reduce the sand using amount of fuse,
The yield rate of fuse is improved, and not easy to break, fuse is short, penetrates sand reality.
In the prior art, fuse includes the insertion section of arc-shaped component and cylinder, and the entire width of fuse is
80.6mm or so, with a thickness of 29.8mm or so；After being changed to the core assembly in the present embodiment, the width of fuse is reduced to 36.7mm
Left and right, thickness become 12mm or so.
In the present embodiment, the width and thickness of fuse becomes smaller, but will not influence casting dimension, the only core head of change
The size divided, the part for forming casting do not change.
In the present embodiment, using the technique of upper-lower casing casting are as follows:
The installation of sand mold component: core assembly 3 being placed in type chamber 6, upper housing 1 is taken to be installed in lower case 2, and 6, type chamber
In in sand mold component；When installation, the first sprue 4 on upper housing 1 and 5 Matching installation of the second sprue in lower case 2；
It further include by upper housing 1 when being respectively equipped with fastening column 12 and buckling groove 13 on upper housing 1 and lower case 2
Sand mold group is formed after being fastened with lower case 2 by fastening column 12 and buckling groove 13, is equipped in the sand mold group for pouring
The type chamber 6 of note.
Casting: potting syrup is by pouring cup the first sprue 4 of inflow and the second sprue 5, subsequently into type chamber 6,
So that at least forming an arc needle product in type chamber 6；
Wherein, it is poured step specifically:
Potting syrup is flowed into the first sprue 4 and the second sprue 5 by pouring cup, and pass through ingate 7 flow into it is each
In type chamber 6, so that at least forming an arc needle product in each type chamber 6.
It further include teeming step, teeming step after being poured step step specifically:
By subsidizing channel 8, potting syrup carries out subsidy to 6 groups of type chamber of center of circle direction of the lower case 2 close to arc and pours
Note.
Arc needle product takes out: dismantling upper housing 1 and lower case 2, takes out the complete product of castable.
Pouring procedure in the present embodiment, by shell mould sand mold, when casting, the channel that potting syrup passes through is less, can use up
Enter in type chamber 6 fastly, potting syrup flowing is uniform, and the thickness of sand mold is thin, then same on sand mold by the way that the sand mold of arc is arranged
To two type chambers 6 of setting, sand using amount can reduce, improve casting efficiency, install high-efficient, the reduction amount of labour additional.
Embodiment 4
Referring to shown in attached drawing 5-10, in the present embodiment, the casting mentioned in production example 3, specially arc needle are needed
Structure, ontology are arcuate structure, are respectively equipped with pin hole, the guide groove knot of the side setting arc of arc in the two sides of arc
Structure, i.e. side are provided with the trough body structure of arc.
Referring to shown in attached drawing 5-10, in the present embodiment, including upper housing 1, lower case 2 and core assembly 3；The present embodiment
In, the second sprue 5 and the cross gate 9 with arc are set in lower case 2, set respectively in the two sides of the cross gate 9 of arc
A type chamber 6 is set, cross gate 9 is connect by ingate 7 with type chamber 6；The second fuse 302 and third fuse of core assembly 3
303 are fixedly connected by boss 10 with shrinkage pool 11 in advance, form the fuse of arc, the fuse setting of arc is in type chamber 6 far from circle
The side of the heart, and then on the type chamber 6 of the center point, fuse is arranged close to cross gate 9, and the flow direction of potting syrup is at this time,
Enter in cross gate 9 from the first sprue 4 and the second sprue 5, the type chamber 6. of two sides is flowed to when its stream by ingate 7
When the type chamber 6 gone out to the close center of circle, needs to be formed the arc fuse of arc needle guide groove by climbing over, enter from above close to circle
The type chamber 6 in heart direction.Herein, since the conductor rope groove sidewall of arc needle casting is relatively thin, i.e. arc fuse influences hot metal flow than relatively thin
Amount is to influencing filling velocity, at this point, increase subsidy channel 8 in arc fuse side, and by the lightening recesses among type chamber 6
15 subsidies are filled and led up；Specifically, lightening recesses 15 are exactly the arc trough among casting, are used to mitigate casting weight, prevent simultaneously
Only deform；Enter type chamber channel to increase molten iron.
In the present embodiment, by increasing subsidy channel 8 in the arc fuse outer wall for forming the core assembly 3 of guide groove, together
When casting weight loss groove is filled and led up, to increase into iron water amount (i.e. potting syrup), potting syrup climbs over above arc fuse through ingate 7
It is connected with subsidy channel 8, into casting type chamber 6.
Pouring procedure in the present embodiment needs multiple groups sand mold group to be poured to form multiple groups casting, comprising the following steps:
Firstly, sand mold component is installed:
1) it is first well placed dedicated lower fixture, then takes a lower case 2, tight second is blocked up with dedicated precoated sand insert and directly pours
Road 5 (i.e. stifled bottom), prevents from metalling run out.
2) the second fuse 302 and third fuse 303 in core assembly 3 are installed, (positioning convex platform 10 of fuse is embedded in
It positions in shrinkage pool 11)；Meanwhile core assembly 3 being fixed on to the type chamber 6 of lower case 2 by positioning convex platform 16 and positioning groove 17
It is interior, the first fuse 301 is placed in 6 end of type chamber and fixes 302 end of the second fuse, and the core print and core platform of fuse coincide tight
It is real.
3) it takes upper housing 1 to be installed in lower case 2, closes sand mold, form sand mold group；Upper housing 1 closely connects with lower case 2
It connects, close fit between sprue.
4) above step, the straight quota height that is only added to, then in placed on top are repeated.
5) upper fixture is put, screw rod is installed and tightens screw.
Secondly, casting: installing foam ceramic filter at the top of sprue, installing sprue cup after burying case jolt ramming.
Potting syrup is flowed into the first sprue 4 and the second sprue 5 by pouring cup, subsequently into type chamber 6, so that type
An arc needle product is at least formed in chamber 6；For multiple groups sand mold group, 5 lower part of the second sprue and next group of sand mold group
First sprue, 4 connection, and then realize the constant flow of potting syrup.
The casting step specifically:
Potting syrup is flowed into the first sprue 4 and the second sprue 5 by pouring cup, and pass through ingate 7 flow into it is each
In type chamber 6, so that at least forming an arc needle product in each type chamber 6.
Again, teeming step specifically:
By subsidizing channel 8, potting syrup carries out subsidy to 6 groups of type chamber of center of circle direction of the lower case 2 close to arc and pours
Note.
Finally, arc needle product takes out: dismantling upper housing 1 and lower case 2, take out the complete product of castable.
In the present embodiment, the maximum gauge of sand mold is 12mm；Sand mold thickness becomes smaller, and gas permeability improves, casting upper surface
The defects of stomata, cold shut, is almost without significantly improving blank yield rate.
Sand mold in the present embodiment, when preparing sand mold up and down, the apperance for forming casting is shape when upper mold on lower sand mold
The back side and reinforcing rib at sand mold, precoated sand are by penetrating sand hopper compressed air, by vertical into sand hole entrance on upper sand mold
Cavity between upper and lower mould, and it is full of cavity, through sand mold is made after 3-5 minutes be heating and curing, because sand is filling type Shi Shouxian
What is filled up is lower die, and what is be finally full of is upper mold (back side), because penetrating not firm defect caused by the reasons such as feel suffocated can all show
The back side will not influence apperance face, that is, will not influence casting quality.And then upper housing 1 and lower case 2 in the present embodiment, system
Standby process is simple.
In the present embodiment, upper housing 1 and lower case 2 are arcuate structure, and sand mold size is small, and pass through two sand mold shapes
At sand mold thickness is thin, convenient for preparation；When prepared by sand mold, easy to be completely well-done, reduction is heating and curing the time, improves shell efficiency processed,
It is significant to subtract sand；When sand mold in the present embodiment is poured, potting syrup flows to the two sides casting of arc from the middle position of arc
Road, ingate 7 is apart from short, and then the channel that potting syrup flows through is few, saves the molten metal (molten iron) of casting.
Comparative example
Referring to shown in attached drawing 1-4, in the present embodiment, sand mold 100 is the identical sand mold of structure, and two sides all has the type of casting
Chamber 6, i.e. arc cross gate 400, in the present embodiment, core assembly 3 includes the long fuse of arc and is used to form arc needle two
The column fuse of a pin hole.
Casting installation process in the present embodiment is as follows:
Firstly, it is necessary to identical sand mold 100 several, stack mutually, each sand mold upper and lower surface has type chamber 6, fuse
Arc fuse and cylinder in component 3 are directly placed into type chamber 6；
Secondly, fastening after multiple sand molds 100 stack by fastener, potting syrup is then carried out by sprue 200
Casting needs to initially enter secondary cross gate 300 by sprue 200 when potting syrup flows, and then passes through the arc into its two sides
In shape cross gate 400, casting forms cast product；
Finally, disassembly sand mold 100, that is, can be taken off cast product.
By attached drawing it is found that in the present embodiment, sand mold 100 is the structure similar to diamond shape, relative to arc sand mold, sand
The width of type ontology is big, and cross section is big；Meanwhile in sand mold 100, the contrary setting of two 400 arcs of arc cross gate, this
When sand mold size it is larger, necessarily cause the ratio of secondary cross gate 300 and cast molding chamber (i.e. arc cross gate 400) big, this
Kind structure, has the disadvantage that
First is that placer iron is than big, raw material dosage is big；When forming sand mold 100, consumptive material is more；
Second is that sand mold size is big, need bigger energy consumption to be solidified when making sand mold, while when making sand mold, is easy
The not firm problem of sand is penetrated in appearance, and when this problem necessarily causes sand mold to be poured, sand mold is easy to dissipate, and can not be successfully casting；
Third is that running channel volume is big, waste more.When casting, potting syrup needs to arrive by longer secondary cross gate 300
Up to arc cross gate 400, potting syrup circulation is slow.
In the present embodiment, for sand mold with a thickness of 65mm, the solidification of sand mold intermediate capping film sand is ripe impermeable, causes gas forming amount big, breathes freely
Property is very poor, while without solidifying ripe impermeable precoated sand, gas forming amount is small.
In comparative example, sand mold two sides has molding cavity in stack-type technique, and general volume and thickness are all bigger, uses
Sand amount is relatively more, but since the thickness of sand mold is larger, sand mold be it is solid, thicker, sand using amount is big, and at high cost with sand, center portion is covered
It is saturating that film sand is not easy heat hardening, influences sand mold intensity, uncured precoated sand gas forming amount is big, and bleb defect is more, therefore sand mold
The production qualification rate of sand mold is relatively low, influences casting quality, and sand using amount is big, and the yield rate of sand mold 100 is poor.
The technique and consumptive material of embodiment 4 and comparative example compare, and comparative situation is as shown in table 1:
Table 1:
| Placer iron ratio | Sand using amount | Product yield | Yield rate comparison | |
| Embodiment 4 | 2.02 | 13.35Kg | 60.3% | 91.6% |
| Comparative example | 5.20 | 31.4Kg | 45.7% | 67.4% |
By table 1 it is found that improved sand mold and technique, placer iron is than reducing, sand using amount is reduced, product yield drop
It is low, and yield rate comparison is increased；Sand mold thickness reduces.
In the utility model, having reduces sand mold size, optimization running channel design, reaches and improves sand mold production yields, mentions
High casting quality lowers running channel volume, reduces the effect of cost.
In the present embodiment, shell mould is changed to by original stack-type, sand mold thickness reduces to 12mm, then with reinforcing rib support and by force
Change, sand mold can be completely well-done when being heating and curing, and reduces the time about 1.5min that is heating and curing, and using electricity wisely improves shell effect processed
Rate, also ensures intensity, without splitting shell defect, hence it is evident that the yield rate for improving sand mold and casting, it is significant to subtract sand, sand mold weight saving
Very much, it can easily be moved very much when shell processed and installation operate, reduce the labor intensity of operative employee, improve efficiency.
In the present embodiment, by changing putting for shell, originally technique is that two apperance Inner arcs are opposite, i.e., from Inner arc
Place is into molten iron, and existing technique is that two apperance circular arcs are unanimously in the same direction, i.e., molten iron is from an apperance Inner arc into from another apperance
External arc (guide groove) is into two apperances become very compact, and sand mold narrows, and reduce obvious.
Originally an arc cross gate is arranged in each apperance Inner arc of technique, also needs from sprue to arc cross gate
Two secondary cross gates connect, and in the present embodiment, with a cross gate simultaneously into two apperances are poured, sprue is arranged in cross gate
Between, a cross gate and two secondary cross gates are reduced, product yield is significantly improved.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is only limited to these instructions.For the ordinary skill of the utility model technical field
For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, should all regard
To belong to the protection scope of the utility model.
Claims (7)
1. a kind of casting sand mould of herbage collecting mechanical arc needle characterized by comprising
Upper housing (1), the upper housing (1) are arcuate structure, and the arcuate structure is equipped with through the upper housing (1) up and down
First sprue (4) at both ends, first sprue (4) communicate with the pouring cup of storage potting syrup；
Lower case (2), the lower case (2) are and the upper housing (1) matched arcuate structure, the lower case (2) and institute
It states the first sprue (4) corresponding position and is equipped with the second sprue (5) for running through lower case (2) upper and lower ends；
After the upper housing (1) and lower case (2) fasten, at least one type chamber (6) is formed, the type chamber (6) is arc, described
First sprue (4) and the second sprue (5) are communicated with the type chamber (6), form arc needle after type chamber (6) casting
Casting；
Core assembly (3), the width of the core assembly (3) are less than the width of the type chamber (6), and the core assembly (3)
In type chamber (6), arc needle casting is formed for secondary cavity (6).
2. a kind of casting sand mould of herbage collecting mechanical arc needle according to claim 1, which is characterized in that the type
Chamber (6) by the lower case (2) constitute, along the radian direction of the lower case (2) be provided with the cross gate of arc (9),
The cross gate (9) communicates with second sprue (5), and the two sides of the cross gate (9) are respectively equipped with the identical type of structure
Chamber group, the type chamber group include the parallel type chamber (6) of several camber lines；Each type chamber (6) with the cross gate (9)
It communicates.
3. a kind of casting sand mould of herbage collecting mechanical arc needle according to claim 2, which is characterized in that the cross
Running channel (9) is equipped with several ingates (7), the two sides of each ingate (7) and the type chamber close to cross gate (9) two sides
(6) it is connected to.
4. a kind of casting sand mould of herbage collecting mechanical arc needle according to claim 2, which is characterized in that further include
It subsidizes channel (8), the subsidy channel (8) is located at ingate (7) end, and the center of circle direction of the lower case (2) close to arc
Setting.
5. a kind of casting sand mould of herbage collecting mechanical arc needle according to claim 4, which is characterized in that the benefit
Pasting channel (8) is hierarchic structure, and the hierarchic structure includes several flights.
6. a kind of casting sand mould of herbage collecting mechanical arc needle according to claim 1, which is characterized in that the core
Sub-component (3) includes that the first fuse (301), the second fuse (302) and third fuse (303), first fuse (301) are set
In one end of the type chamber (6) of arc, second fuse (302) connect the fuse to form arc with third fuse (303), is placed in
In type chamber (6), the second fuse (302) end is equipped with columnar projections, and the columnar projections are placed in the type chamber (6) of the arc
The other end.
7. a kind of casting sand mould of herbage collecting mechanical arc needle according to claim 6, which is characterized in that described
Two fuses (302) end be equipped with boss (10), one end that the third fuse (303) connect with the second fuse (302) equipped with
The shrinkage pool (11) of boss (10) cooperation, when second fuse (302) connect with third fuse (303), the boss
(10) it is inserted into the shrinkage pool (11).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821891219.5U CN209424486U (en) | 2018-11-16 | 2018-11-16 | A kind of casting sand mould of herbage collecting mechanical arc needle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109261896A (en) * | 2018-11-16 | 2019-01-25 | 西安合力汽车配件有限公司 | A kind of casting sand mould and pouring procedure of herbage collecting mechanical arc needle |
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2018
- 2018-11-16 CN CN201821891219.5U patent/CN209424486U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109261896A (en) * | 2018-11-16 | 2019-01-25 | 西安合力汽车配件有限公司 | A kind of casting sand mould and pouring procedure of herbage collecting mechanical arc needle |
| CN109261896B (en) * | 2018-11-16 | 2023-11-14 | 西安合力汽车配件有限公司 | Casting sand mold and casting method of arc needle for pasture collection machine |
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