CN101837432B - Tyre casting method and casting die - Google Patents
Tyre casting method and casting die Download PDFInfo
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- CN101837432B CN101837432B CN2010101777866A CN201010177786A CN101837432B CN 101837432 B CN101837432 B CN 101837432B CN 2010101777866 A CN2010101777866 A CN 2010101777866A CN 201010177786 A CN201010177786 A CN 201010177786A CN 101837432 B CN101837432 B CN 101837432B
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Abstract
The invention discloses a tyre casting method, comprising a toroidal flute cast (1), a bottom casting runner system, a feeder head (3) and a feeder head point casting runner system, wherein, the toroidal flute cast (1) comprises a toroidal inner wall (11), a toroidal outer wall (12) and a toroidal bottom mat (13) which are all composed of a plurality of blocks with different quantities; the bottom casting runner system comprises a bottom casting cross runner (21), a bottom casting ingate (22) and a bottom casting sprue (23). The invention discloses a method for casting a tyre by utilizing a tyre casting cold die. The method has high process yield, and the tyre casting produced by the method has no shrinkage porosity, shrinkage cavity and crack defects.
Description
Technical field
The present invention relates to a kind of casting technique, particularly a kind of the wheel is with cold mould to cover the sand casting method.
Background technology
The wheel band of cement rotary kiln is the important load bearing component of cement rotary kiln equipment, is related to the safety of a whole piece cement producing line and the service life of cement kiln.China is along with the develop rapidly of national economy, and the cement increasing demand increases, and cement in China output has leapt to the first in the world, newly-builtly building manufacture of cement above 300.As the indispensable parts on the cement rotary kiln production line, wheel band total demand is huge, and annual requirement is more than 4.5 ten thousand tons.
Wheel band internal soundness requires high, all need carry out the ultrasonic examination inspection and reach the above requirement of GB GB7233-87 secondary, at present, the continuity riser feeding method foundry goods (shown in Fig. 6-7) of employing is arranged, and its product yield is low, and production cost is high; Adopt dispersed riser feeding method foundry goods (shown in Fig. 4-5) in addition, this casting ultrasonic flaw detection qualification rate is very low, on average below 52%.
Summary of the invention
The objective of the invention is to overcome the above-mentioned deficiency of prior art and a kind of tyre casting method that is used for is provided, its rising head shape reduces, and improves casting process yield, thereby reduces cost.
Another object of the present invention is to overcome the above-mentioned deficiency of prior art and a kind of tyre casting method is provided; This method operation is simple; Guaranteed steadily filling type fast, having safeguarded that towards the consecutive solidification temperature field of rising head the wheel band foundry goods of producing with this method does not have shrinkage porosite shrinkage cavity, flawless defective of cast; Product yield is high.
Technical scheme of the present invention is: a kind of band casting die of taking turns, and it comprises annular channel mould, siphon runner system, rising head and emits stomion to annotate pipe-line system; The annular channel mould is installed in the melt pit; It comprises ring-shaped inner wall, annular outer wall and annular heelpiece; Ring-shaped inner wall and annular outer wall are in the upper edge, the interior outside of annular heelpiece respectively; Ring-shaped inner wall, annular outer wall surround the annular vallecular cavity with the annular heelpiece, and the shape of annular vallecular cavity adapts with the shape of the wheel band that needs casting; Annular inner wall is surrounded by the fan annular inner wall piece of a plurality of equal arc chord angles, a bit of distance of being separated by between every two adjacent fan annular inner wall pieces; The annular outer wall is surrounded by the fan annular outer wall piece of a plurality of equal arc chord angles, a bit of distance of being separated by between every two adjacent fan annular outer wall pieces; The annular heelpiece is surrounded by the fan annular heelpiece piece of a plurality of equal arc chord angles, a bit of distance of being separated by between every two adjacent annular heelpiece pieces of fan; The number of the number of fan annular inner wall piece, fan annular outer wall piece and to fan the number of annular heelpiece piece unequal in twos; Also be provided with in the annular channel mould and cover layer of sand, cover also to be coated with on the layer of sand and be brushed with the alcohol zircon flour coating layer; The siphon runner system comprises rising pouring cross gate, rising pouring ingate and rising pouring sprue; The rising pouring cross gate is an annular earthenware; One end of rising pouring ingate is communicated with the rising pouring cross gate; Its other end passes the back from the annular heelpiece of annular channel mould and is communicated with the vallecular cavity of annular channel mould, and the rising pouring ingate is many; One end of rising pouring sprue vertically is installed on the rising pouring cross gate and with the rising pouring cross gate and is communicated with, and the rising pouring sprue is many; The annular rising head mould of rising head for matching with the annular channel mould, it is located at annular channel mould top; Emit stomion to annotate pipe-line system and comprise rising head cross gate, rising head ingate and rising head sprue, the rising head cross gate is an annular pipe, and an end of rising head ingate is communicated with the rising head cross gate, and its other end is communicated to the atrium of rising head, and the rising head ingate is many; One end of rising head sprue is installed on the rising head cross gate, and the rising head sprue is many.
The further technical scheme of the present invention is: described fan annular inner wall piece is 15, the 45～60mm of being separated by between every two adjacent fan annular inner wall pieces; Fan annular outer wall piece is 20, the 15～30mm of being separated by between every two adjacent fan annular outer wall pieces; Fanning annular heelpiece piece is ten, the 70～90mm of being separated by between every two adjacent annular heelpiece pieces of fan; The thickness of ring-shaped inner wall, annular outer wall and annular heelpiece is 150～200mm; Covering sand layer thickness is 35～45mm; The rising pouring cross gate is an annular earthenware, and it is installed in the height that equates with the upper brim edge of annular channel mould; The rising pouring ingate is ten, and ten foundation are annotated ingate and evenly arranged along annular rising pouring cross gate; The rising pouring sprue is the six roots of sensation, and six rising pouring sprues are evenly arranged along annular rising pouring cross gate; Rising pouring cross gate, rising pouring ingate and rising pouring sprue are earthenware, and rising pouring cross gate, rising pouring ingate and rising pouring sprue all are enclosed with the fast dry sand of the thick waterglass of 90～110mm outward; The rising head ingate is ten, and ten rising head ingates evenly arrange along annular rising head cross gate, and corresponding with the position of rising pouring ingate.
The present invention's technical scheme further is: described rising pouring cross gate internal diameter is 120mm, and rising pouring ingate internal diameter is 100mm; Rising pouring sprue internal diameter is 100mm; The modulus of rising head is designed to 0.8～0.9 times of casting modulus, and the height of rising head is 700～800mm, and width is 510～554mm, and tapering is 1: 10; The rising head cross gate is an annular earthenware, and it is installed in the height from rising head 90～110mm suitable for reading.
The further again technical scheme of the present invention is: covering layer of sand is that following material is processed: 70～140 orders are cleaned sand, waterglass and alicyclic organic, and wherein waterglass content is 3～5 weight %, and alicyclic organic content is 0.3～0.5 weight %; Cover also to be coated with on the layer of sand and be brushed with the thick alcohol zircon flour coating layer of 0.4～0.6mm.
Another technical scheme of the present invention is: a kind of tyre casting method, and it mainly comprises the steps;
One, makes casting die
(1), establishes the hole
The size design of cast wheel band and carry out the casting melt pit as required;
(2), install the annular channel mould
Ring-shaped inner wall, annular outer wall and the annular heelpiece of annular channel mould are arranged in the casting melt pit; The full pattern of loosing core that needs the cast wheel band is put into the annular channel mould; Regulate each fritter of forming ring-shaped inner wall, annular outer wall and annular heelpiece; Making needs loosing core of cast wheel band to reserve the thickness that covers layer of sand between full pattern and the annular channel mould, fills out the molding sand that covers layer of sand;
(3), install the siphon runner system
Rising pouring cross gate, rising pouring ingate and the rising pouring sprue of siphon runner system have been buried underground;
(4), install rising head and emit stomion to annotate pipe-line system
Feed-ring is put on the annular channel mould, installed and emit stomion to annotate pipe-line system, install promptly that the rising head ingate that emits stomion to annotate pipe-line system emits, mouthful cross gate and rising head sprue;
(5), oven dry
Adopt electric calorifier to blow 120～250 ℃ of hot-airs annular channel mould 1 was carried out mould drying 5～8 hours;
Two, cast
Rising pouring sprue, rising pouring cross gate and rising pouring ingate through the siphon runner system injects liquid material in the vallecular cavity of annular channel mould from annular channel mould bottom with the speed of 18～25 tpm clocks, and 0.6～0.8 o'clock of height that is poured into rising head stops cast; The degree of superheat of liquid material is controlled between 40～60 ℃ during cast;
Three, annotate rising head
0.6～0.8 o'clock of height that is poured into rising head stopped to pour into a mould 25～35 minutes; Through the rising head sprue, rising head cross gate and the rising head ingate that emit stomion to annotate pipe-line system liquid material point is annotated rising head to the technological design height again, and build common exothermic shield.
The present invention further another technical scheme is: described ring-shaped inner wall is surrounded by the fan annular inner wall piece of 15 equal arc chord angles; Fan the 45～60mm of being separated by between the annular inner wall pieces for whenever adjacent two; The annular outer wall is surrounded by the fan annular outer wall piece of 20 equal arc chord angles; Fan the 15～30mm of being separated by between the annular outer wall pieces for whenever adjacent two; The annular heelpiece is surrounded by the fan annular heelpiece piece of ten equal arc chord angles, the 70～90mm of being separated by between every two adjacent annular heelpiece pieces of fan, and the thickness of ring-shaped inner wall, annular outer wall and annular heelpiece is 150～200mm.
The present invention also further another technical scheme is: describedly brush the thick alcohol zircon flour coating of 0.4～0.6mm on the layer of sand covering.
The present invention also again one the step another technical scheme be: described rising head ingate is installed in the height from rising head 90～110mm suitable for reading.
The present invention compared with prior art has following characteristics:
1, adopt the cold mould of feed-ring to cover the sand scheme and produce the wheel band, foundry goods inside does not have shrinkage porosity defect of contraction cavity, and the casting program of teeming formula also reaches the purpose that quick and stable is filled type; The rising head shape reduces, and improves casting process yield, thereby low-cost;
2, siphon runner of the present invention system is for steadily filling the bottom gating of type, and the cast form that the type points of engagement is annotated rising head is steadily filled in rising pouring, and what guaranteed cast steadily fills type fast, has promoted the wheel band to realize consecutive solidification;
3, cold mould covers sand, Quench foundry goods, reduced casting modulus, the foundry goods of required feeding reduces relatively, thereby the required rising head of feeding wheel band foundry goods also reduces relatively;
4, the alternative existing sand that covers of high strength fat hardened sand can significantly reduce the moulding cost, also can simplify production procedure, reduces the production cycle;
5, casting process yield can be controlled in 58%～60%;
6, the wheel band foundry goods of the present invention's production, no shrinkage porosite shrinkage cavity, the flawless defective fully can be through the acceptance of GB7233-87 secondary requirement, steady quality.
In order to be illustrated more clearly in the present invention, enumerate following examples, but it there is not any restriction to scope of invention.
Description of drawings
Fig. 1 is structural representation of taking turns the band casting die of the present invention;
Fig. 2 is the A-A profile of Fig. 1;
Fig. 3 is structural representation of taking turns the annular heelpiece of band casting die of the present invention;
Fig. 4 is the structural representation of the wheel band casting die of prior art;
Fig. 5 is the vertical view of Fig. 4;
Fig. 6 is the structural representation of the wheel band casting die of another kind of prior art;
Fig. 7 is the vertical view of Fig. 6.
The specific embodiment
Shown in Fig. 1-3, a kind of wheel band casting die that is used for, it comprises annular channel mould 1, siphon runner system, rising head 3 and emits stomion to annotate pipe-line system; Annular channel mould 1 is installed in the melt pit; It comprises ring-shaped inner wall 11, annular outer wall 12 and annular heelpiece 13; Ring-shaped inner wall 11 and annular outer wall 12 are in the upper edge, the interior outside of annular heelpiece 13 respectively; Ring-shaped inner wall 11, annular outer wall 12 surround annular vallecular cavity 14 with annular heelpiece 13, and the wheel of the shape of annular vallecular cavity 14 and needs casting adapts with 5 shape; Annular inner wall 11 is surrounded by the fan annular inner wall piece 111 of 15 equal arc chord angles; Be that each fan annular inner wall piece 111 is about 1/15th annulus section; Being separated by between every two adjacent fan annular inner wall pieces 111, (mm i.e. millimeter for 45～60mm; 50mm preferably), (" about 1/15th " is meant between every two adjacent fan annular inner wall pieces and also reserves 45～60 mm clearance, so each fan annular inner wall piece 111 can be slightly less than 1/15th annulus section); Annular outer wall 12 is surrounded by the fan annular outer wall piece 121 of 20 equal arc chord angles, the 15～30mm (preferably 20mm) of being separated by between every two adjacent fan annular outer wall pieces 121; Annular heelpiece 13 is surrounded by the fan annular heelpiece piece 131 of ten equal arc chord angles, the 70～90mm (preferably 80mm) of being separated by between every two adjacent annular heelpiece pieces of fan.The thickness of ring-shaped inner wall 11, annular outer wall 12 and annular heelpiece 13 is 150～200mm, and annular channel mould 1 has Quench wheel band, enlarges wheel band area of dissipation and reduces to take turns the effect of band modulus; Ring-shaped inner wall 11 is made up of the piece of unequal number with annular outer wall 12, can effectively prevent to take turns the generation of band crackle, and this combined type mould makes a cover die can be used for the production of many specification wheel bands.
Also be provided with in the annular channel mould 1 and cover layer of sand 15; Covering layer of sand 15 thickness is 35～45mm; Covering layer of sand 15 thickness can be according to T=B/20～30 formulae design (preferably T=B/25), and wherein T is for covering layer of sand 15 thickness, and B is the thickness of the wheel band wall that will cast; Covering layer of sand 15 processes for high strength alicyclic organic sand; The material that layer of sand 15 is covered in making is: 70～140 orders are cleaned sand, waterglass and alicyclic organic, and wherein waterglass content is 3～5 weight % (being preferably 4%), and alicyclic organic content is 0.3～0.5 weight % (being preferably 0.4%); Cover also to be coated with on the layer of sand 15 and be brushed with the thick alcohol zircon flour coating layer of 0.4～0.6mm (being preferably 0.5mm).Adopt more fine grain scouring sand to help to prevent the generation of scab, this material possibly substitute conventional special use fully and cover sand.
The siphon runner system comprises rising pouring cross gate 21, rising pouring ingate 22 and rising pouring sprue 23; Rising pouring cross gate 21 is an annular earthenware, and it is installed in the height that equates with the upper brim edge of annular channel mould 1, and its internal diameter is 120mm, i.e. φ 120mm; The end that foundation is annotated ingate 22 is communicated with rising pouring cross gate 21; Its other end passes the back from the annular heelpiece 13 of annular channel mould 1 and is communicated with the vallecular cavity of annular channel mould 1; Rising pouring ingate 22 is ten; Ten foundation are annotated ingate 22 and are arranged evenly that along annular rising pouring cross gate 21 every internal diameter is 100mm, i.e. φ 100mm; One end of rising pouring sprue 23 vertically is installed on the rising pouring cross gate 21 and with rising pouring cross gate 21 and is communicated with, and rising pouring sprue 23 is the six roots of sensation, and six rising pouring sprues 23 arrange evenly that along annular rising pouring cross gate 21 every internal diameter is 100mm, i.e. φ 100mm.
Rising pouring cross gate 21, rising pouring ingate 22 and rising pouring sprue 23 are earthenware, and rising pouring cross gate 21, rising pouring ingate 22 and the rising pouring sprue 23 outer fast dry sands of waterglass that all are enclosed with 90～110mm (being preferably 100mm) are metalled run out preventing.
The annular rising head mould of rising head 3 for matching with annular channel mould 1, it is located at annular channel mould 1 top, and the modulus of rising head 3 is designed to 0.8～0.9 times of casting modulus; Make casting process yield can be controlled in 58%～60%; The height of rising head 3 is 700mm, and width is 510mm, and tapering is 1: 10.
Emit stomion to annotate pipe-line system and comprise rising head cross gate 41, rising head ingate 42 and rising head sprue 43, rising head cross gate 41 is an annular earthenware, and it is installed in the height from rising head 3 90～110mm suitable for reading; One end of rising head ingate 42 is communicated with rising head cross gate 41, and its other end is communicated to the atrium of rising head 3, and rising head ingate 42 is ten, and ten rising head ingates 42 evenly arrange along annular rising head cross gate 41, and corresponding with the position of rising pouring ingate 22; One end of rising head sprue 43 vertically is installed on the rising head cross gate 41, and rising head sprue 43 is many, and many rising head sprues 43 are evenly arranged along annular rising head cross gate 41.
Tyre casting method: shown in Fig. 1-3, with the tyre casting method of material ZG35Mn, wheel mark cun φ 5950 * φ 5050 * 950mm, it mainly comprises the steps:
One, makes casting die
(1), establishes the hole
The size design of cast wheel band and carry out the casting melt pit as required;
(2), install annular channel mould 1
Ring-shaped inner wall 11, annular outer wall 12 and the annular heelpiece 13 of annular channel mould 1 are arranged in the casting melt pit; Wherein ring-shaped inner wall 11 is surrounded by the fan annular inner wall piece 111 of 15 equal arc chord angles; Fan the 45～60mm of being separated by between the annular inner wall pieces 111 for whenever adjacent two; Annular outer wall 12 is surrounded by the fan annular outer wall piece 121 of 20 equal arc chord angles; Fan the 15～30mm of being separated by between the annular outer wall pieces 121 for whenever adjacent two; Annular heelpiece 13 is surrounded by the fan annular heelpiece piece 131 of ten equal arc chord angles, the 70～90mm of being separated by between every two adjacent annular heelpiece pieces of fan, and the thickness of ring-shaped inner wall 11, annular outer wall 12 and annular heelpiece 13 is 150～200mm.
(3), will need the full pattern of loosing core of cast wheel band to put into annular channel mould 1; Regulate each fritter of forming ring-shaped inner wall 11, annular outer wall 12 and annular heelpiece 13; Making needs loosing core of cast wheel band to reserve the thickness that covers layer of sand 15 between full pattern and the annular channel mould 1; Fill out the molding sand that covers layer of sand 15; Brush the thick alcohol zircon flour coating of 0.4～0.6mm on the layer of sand 15 covering, buried siphon runner system (promptly having installed rising pouring cross gate 21, rising pouring ingate 22 and rising pouring sprue 23) simultaneously underground;
(4), install rising head
Feed-ring 3 is put on annular channel mould 1, installed and emit stomion to annotate pipe-line system, promptly install the rising head cross gate 41, rising head ingate 42 and the rising head sprue 43 that emit stomion to annotate pipe-line system, make the height that is installed in from rising head 3 90～110mm suitable for reading;
(5), oven dry
Adopt electric calorifier to blow 120～250 ℃ of hot-airs annular channel mould 1 was carried out mould drying 5～8 hours, can shorten the production cycle of wheel band, reduced energy resource consumption of char combustion mould drying and pollutant emission.
Two, cast
Through siphon runner system (rising pouring cross gate 21, rising pouring ingate 22 and rising pouring sprue 23) liquid ZG35Mn material is injected in the die cavity of annular channel mould 1 from annular channel mould 1 (annular channel mould 1 is cold mould) bottom with the speed of 18～25 tpm clocks, stopped cast when being poured into 0.6～0.8 (preferably 0.67) of height of rising head 3; During cast the degree of superheat of liquid ZG35Mn material 40～60 ℃ (degree centigrade) between.The definite of large-scale steel-casting pouring temperature mainly confirms with reference to liquidus curve; Burning into sand is glued in the too high easy formation of pouring temperature; Also be prone to produce the secondary oxidation of molten steel; The slag sand of crossing in low molten steel and the casting mold is difficult for emersion again, and it is better that cold mould covers grinding wheel belt scum silica frost emery stick spare, generally selects the less degree of superheat.1498 ℃ of this material liquidus temperatures, 1550 ℃ of pouring temperatures,
Confirming of poring rate, it is generally all thinner that the wheel band covers layer of sand 15, and it is higher to cover the sand height, occurs covering layer of sand 15 easily and peel off and collapse phenomenon and influence wheel band quality, selects poring rate faster to help preventing the generation of this situation.
Three, annotate rising head
When 0.6～0.8 o'clock of height that is poured into rising head 3 stops to pour into a mould 25～35 minutes (preferably 30 minutes), through emitting stomion to annotate pipe-line system liquid material point is annotated rising head to technological design highly again, and build common exothermic shield.0.6 of the height of rising head 3～0.8 o'clock stops to pour into a mould annotates rising head again after 25～35 minutes, can prevent that slag sand from pouring foundry goods, and can guarantee that the high-temperature liquid state material pours in the rising head, improves the feeding efficiency of rising head, promotes the wheel band to realize consecutive solidification.
The heavily about 69500kg of wheel band after the casting waters and pays attention to about 115800kg.The wheel band shake out that this embodiment obtains cuts rising head normalizing add-back and intimately handles; Its mechanical performance each item index has all surpassed the performance requirement of JB/T6402-2006; Particularly hardness has reached 200HB, and this has improved more than the 30HB during than no cold die cast, carries out the ultrasonic examination inspection after the roughing; Meet the requirement of GB7233-87 secondary fully, magnetic powder inspection also meets the requirement of GB9444-2006 secondary after the fine finishining.
Embodiment 2
The difference of itself and embodiment 1 is: the material that this instance foundry goods adopts is ZG35CrMo; This material liquidus temperature is 1495 ℃, and pouring temperature is 1550 ℃, and the wheel band is of a size of φ 6420 * φ 5470 * 1080; The heavy 90900kg of wheel band, the cast gross weight is 151500kg; The height of rising head 3 is that 800mm, width are that 554mm, rising head tapering are 1: 10; Other structure and method characteristic are with embodiment 1.
Comparative Examples 1
Shown in Fig. 4-5, disperse rising head, be the integral casting process of tradition wheel band; Castings material ZG35Mn, wheel band accessory size φ 5940 * φ 5040 * 880mm, the heavy 63500kg of wheel band foundry goods; Always water heavy 111500kg, 1550 ℃ of pouring temperatures, poring rate 20 tpm clocks; The water inlet of ingate medial surface, 6 oval shape rising heads are uniformly distributed with, and put three external chills between rising head.
The shortcoming of this mould and method is: running gate system is intake from the side, though help the temperature field, the inclusion floating difficulty forms field trash easily and assembles between rising head, and this region surface is second-rate after the foundry goods processing; Middle mud core is bigger, needs special-purpose arbor and just can support such mud core, and adopt the consumption of mud core sand bigger, and the moulding cost is higher; Riser height is bigger, and molten steel is powerful to the type wall pressure, and the foundry goods inside and outside circle is easy to generate mechanicalness scab, the casting cleaning difficulty; Though adopted three external chills between rising head, because wheel band wall thickness is bigger, the mutual heat effect that can not break off two rising heads fully be easy to generate shrinkage porosite shrinkage cavity class defective between two rising heads, thereby ultrasonic examination can not be satisfied the requirement of GB; This takes turns the band product yield and also is merely 57%, than also low three percentage points of present cold die casting product yields.
Comparative Examples 2
Shown in Fig. 6-7, rising head is a tradition flaw detection wheel band integral casting process continuously; Castings material ZG35Mn, casting dimension φ 4960 * φ 4210 * 750mm, the heavy 39500kg of wheel band foundry goods; Always water heavy 87500kg, 1550 ℃ of pouring temperatures, poring rate 20 tpm clocks; The water inlet of ingate medial surface, rising head adopts continuity one week of rising head, the two-layer mud core of middle employing.
Not enough parts of this mould and method are: rising head is oversize, and product yield is low, the only heavy 39500kg of foundry goods; And rising head weight just reaches 46800kg; Though also guaranteed the ultrasonic examination quality, the molten steel cost consumption is huge, and casting process yield is merely 46%; Two-layer mud core causes the moulding cost to increase obviously; The same formation easily of foundry goods inside and outside circle penetration.
The present invention is not limited to above-mentioned concrete structure, so long as adopt identical with the present invention or the casting die that is equal to and the tyre casting method and the casting die of processing step just drop within protection scope of the present invention.
Claims (10)
1. a wheel is with casting die, it is characterized in that: it comprises annular channel mould (1), siphon runner system, rising head (3) and emits stomion to annotate pipe-line system; Annular channel mould (1) is installed in the melt pit; It comprises ring-shaped inner wall (11), annular outer wall (12) and annular heelpiece (13); Ring-shaped inner wall (11) and annular outer wall (12) are in the upper edge, the interior outside of annular heelpiece (13) respectively; Ring-shaped inner wall (11), annular outer wall (12) and annular heelpiece (13) surround one annular vallecular cavity (14), and the shape of annular vallecular cavity (14) adapts with the shape of the wheel band (5) that needs casting; Ring-shaped inner wall (11) is surrounded by the fan annular inner wall piece (111) of a plurality of equal arc chord angles, a bit of distance of being separated by between every adjacent two fan annular inner wall pieces (111); Annular outer wall (12) is surrounded by the fan annular outer wall piece (121) of a plurality of equal arc chord angles, a bit of distance of being separated by between every adjacent two fan annular outer wall pieces (121); Annular heelpiece (13) is surrounded by the fan annular heelpiece piece (131) of a plurality of equal arc chord angles, a bit of distance of being separated by between every two adjacent annular heelpiece pieces of fan; The number of the number of fan annular inner wall piece (111), fan annular outer wall piece (121) is unequal in twos with the number of the annular heelpiece piece of fan (131); Annular channel mould (1) also is provided with and covers layer of sand (15), covers also to be coated with on the layer of sand (15) to be brushed with the alcohol zircon flour coating layer; The siphon runner system comprises rising pouring cross gate (21), rising pouring ingate (22) and rising pouring sprue (23); Rising pouring cross gate (21) is an annular earthenware; One end of rising pouring ingate (22) is communicated with rising pouring cross gate (21); Its other end passes the back from the annular heelpiece (13) of annular channel mould (1) and is communicated with the vallecular cavity (14) of annular channel mould (1), and rising pouring ingate (22) is many; One end of rising pouring sprue (23) vertically is installed in rising pouring cross gate (21) and upward and with rising pouring cross gate (21) is communicated with, and rising pouring sprue (23) is many; The annular rising head mould of rising head (3) for matching with annular channel mould (1), it is located at annular channel mould (1) top; Emit stomion to annotate runner system and comprise rising head cross gate (41), rising head ingate (42) and rising head sprue (43); Rising head cross gate (41) is an annular pipe; One end of rising head ingate (42) is communicated with rising head cross gate (41); Its other end is communicated to the atrium of rising head (3), and rising head ingate (42) is many; One end of rising head sprue (43) is installed on the rising head cross gate (41), and rising head sprue (43) is many.
2. the band casting die of taking turns according to claim 1 is characterized in that: described fan annular inner wall piece (111) is 15, the 45～60mm of being separated by between every adjacent two fan annular inner wall pieces (111); Fan annular outer wall piece (121) is 20, the 15～30mm of being separated by between every adjacent two fan annular outer wall pieces (121); Fanning annular heelpiece piece (131) is ten, the 70～90mm of being separated by between every adjacent two annular heelpiece pieces of fan they (131); The thickness of ring-shaped inner wall (11), annular outer wall (12) and annular heelpiece (13) is 150～200mm; Covering layer of sand (15) thickness is 35～45mm; Rising pouring cross gate (21) is an annular earthenware, and it is installed in the height that equates with the upper brim edge of annular channel mould (1); Rising pouring ingate (22) is ten, and ten foundation are annotated ingate (22) and evenly arranged along annular rising pouring cross gate (21); Rising pouring sprue (23) is the six roots of sensation, and six rising pouring sprues (23) are evenly arranged along annular rising pouring cross gate (21); Rising pouring cross gate (21), rising pouring ingate (22) and rising pouring sprue (23) are earthenware, the outer fast dry sand of the thick waterglass of 90～110mm that all is enclosed with of rising pouring cross gate (21), rising pouring ingate (22) and rising pouring sprue (23); Rising head ingate (42) is ten, and ten rising head ingates (42) evenly arrange along annular rising head cross gate (41), and corresponding with the position of rising pouring ingate (22).
3. the band casting die of taking turns according to claim 1 and 2 is characterized in that: described rising pouring cross gate (21) internal diameter is 120mm, and rising pouring ingate (22) internal diameter is 100mm; Rising pouring sprue (23) internal diameter is 100mm; The modulus of rising head (3) is designed to 0.8～0.9 times of casting modulus, and the height of rising head (3) is 700～800mm, and width is 510～554mm, and tapering is 1: 10; Rising head cross gate (41) is an annular earthenware, and it is installed in the height from rising head (3) 90～110mm suitable for reading.
4. the band casting die of taking turns according to claim 1 and 2 is characterized in that: the described layer of sand (15) that covers is processed for following material; 70～140 orders are cleaned sand, waterglass and alicyclic organic, and wherein waterglass content is 3～5 weight %, and alicyclic organic content is 0.3～0.5 weight %; Cover also to be coated with on the layer of sand (15) and be brushed with the thick alcohol zircon flour coating layer of 0.4～0.6mm.
5. the band casting die of taking turns according to claim 3; It is characterized in that: the described layer of sand (15) that covers is processed for following material: 70～140 orders are cleaned sand, waterglass and alicyclic organic; Wherein waterglass content is 3～5 weight %, and alicyclic organic content is 0.3～0.5 weight %; Cover also to be coated with on the layer of sand (15) and be brushed with the thick alcohol zircon flour coating layer of 0.4～0.6mm.
6. tyre casting method, it is characterized in that: it mainly comprises the steps:
One, makes casting die
(1), establishes the hole
The size design of cast wheel band and carry out the casting melt pit as required;
(2), install the annular channel mould
Ring-shaped inner wall (11), annular outer wall (12) and the annular heelpiece (13) of annular channel mould (1) are arranged in the casting melt pit; The full pattern of loosing core that needs the cast wheel band is put into annular channel mould (1); Regulate each fritter of forming ring-shaped inner wall (11), annular outer wall (12) and annular heelpiece (13); Making needs loosing core of cast wheel band to reserve the thickness that covers layer of sand (15) between full pattern and the annular channel mould (1), fills out the molding sand that covers layer of sand (15);
(3), install the siphon runner system
Rising pouring cross gate (21), rising pouring ingate (22) and the rising pouring sprue (23) of siphon runner system have been buried underground;
(4), install rising head and emit stomion to annotate pipe-line system
Feed-ring (3) is put on annular channel mould (1), installed and emit stomion to annotate pipe-line system, promptly install the rising head cross gate (41), rising head ingate (42) and the rising head sprue (43) that emit stomion to annotate pipe-line system;
(5), oven dry
Adopt electric calorifier to blow 120～250 ℃ of hot-airs annular channel mould (1) was carried out mould drying 5～8 hours;
Two, cast
Rising pouring cross gate (21), rising pouring ingate (22) and rising pouring sprue (23) through the siphon runner system injects liquid material in the vallecular cavity (14) of annular channel mould (1) from annular channel mould (1) bottom with the speed of 18～25 tpm clocks, and 0.6～0.8 o'clock of height that is poured into rising head (3) stops cast; The degree of superheat of liquid material is controlled between 40～60 ℃ during cast;
Three, annotate rising head
0.6～0.8 o'clock of height that is poured into rising head (3) stopped to pour into a mould 25～35 minutes; Through the rising head cross gate (41), rising head ingate (42) and the rising head sprue (43) that emit stomion to annotate pipe-line system liquid material point is annotated rising head to the technological design height again, and build common exothermic shield.
7. tyre casting method according to claim 6; It is characterized in that: described ring-shaped inner wall (11) is surrounded by the fan annular inner wall piece (111) of 15 equal arc chord angles; Fan the 45～60mm of being separated by between the annular inner wall pieces (111) for whenever adjacent two; Annular outer wall (12) is surrounded by the fan annular outer wall piece (121) of 20 equal arc chord angles; Fan the 15～30mm of being separated by between the annular outer wall pieces (121) for whenever adjacent two; Annular heelpiece (13) is surrounded by the fan annular heelpiece piece (131) of ten equal arc chord angles, the 70～90mm of being separated by between every two adjacent annular heelpiece pieces of fan, and the thickness of ring-shaped inner wall (11), annular outer wall (12) and annular heelpiece (13) is 150～200mm.
8. according to claim 6 or 7 described tyre casting methods, it is characterized in that: go up the thick alcohol zircon flour coating of brushing 0.4～0.6mm at the described layer of sand (15) that covers.
9. according to claim 6 or 7 described tyre casting methods, it is characterized in that: described rising head ingate (42) is installed in the height from rising head (3) 90～110mm suitable for reading.
10. tyre casting method according to claim 8 is characterized in that: described rising head ingate (42) is installed in the height from rising head (3) 90～110mm suitable for reading.
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| CN2010101777866A CN101837432B (en) | 2010-05-20 | 2010-05-20 | Tyre casting method and casting die |
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| CN102198490B (en) * | 2011-03-30 | 2014-10-29 | 衡阳中钢衡重铸锻有限公司 | Method for casting vertical lathe ram and casting die |
| CN102699280B (en) * | 2012-06-30 | 2013-11-27 | 南车戚墅堰机车车辆工艺研究所有限公司 | Sand mould of precoated sand for casting single piston ring and manufacturing method of sand mould |
| CN104117635A (en) * | 2014-07-03 | 2014-10-29 | 浙江汉声精密机械有限公司 | Improved rotor sand mold |
| CN104226915B (en) * | 2014-09-26 | 2017-01-25 | 衡阳中钢衡重铸锻有限公司 | Casting method of hollow shaft and casting mold |
| CN104226916B (en) * | 2014-09-26 | 2017-02-15 | 衡阳中钢衡重铸锻有限公司 | Casting method of slag ladle and casting mold |
| CN106001430A (en) * | 2016-07-14 | 2016-10-12 | 共享铸钢有限公司 | Casting process for large-size gear ring casting piece |
| CN106583657A (en) * | 2016-12-13 | 2017-04-26 | 山西平阳重工机械有限责任公司 | Solidification and feeding method for complicated annular thin-wall shell steel casting |
| CN107150106B (en) * | 2017-06-29 | 2024-04-16 | 大连金河铸造有限公司 | Casting process for improving quality of sand sharp corner part and prefabricated sand core structure |
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| CN101209486A (en) * | 2007-12-21 | 2008-07-02 | 上海沪临金属加工有限公司 | Method for preventing casting tooth surface from generating casting flaw in large-scale casting tooth casting parts |
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| CN201261060Y (en) * | 2008-09-29 | 2009-06-24 | 龙口海盟机械有限公司 | Sand mold for casting heavy-duty automobile brake disk |
| CN201380271Y (en) * | 2009-03-31 | 2010-01-13 | 洛阳市兴荣工业有限公司 | Circular casting rough special sandbox |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2008080512A (en) * | 2006-09-26 | 2008-04-10 | Ngk Insulators Ltd | Method for correcting roundness of ring casting for tire molding mold |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101209486A (en) * | 2007-12-21 | 2008-07-02 | 上海沪临金属加工有限公司 | Method for preventing casting tooth surface from generating casting flaw in large-scale casting tooth casting parts |
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| CN201380271Y (en) * | 2009-03-31 | 2010-01-13 | 洛阳市兴荣工业有限公司 | Circular casting rough special sandbox |
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