CN101549389B - Pouring apparatus and casting method for valve lever female spanner - Google Patents
Pouring apparatus and casting method for valve lever female spanner Download PDFInfo
- Publication number
- CN101549389B CN101549389B CN2009101165778A CN200910116577A CN101549389B CN 101549389 B CN101549389 B CN 101549389B CN 2009101165778 A CN2009101165778 A CN 2009101165778A CN 200910116577 A CN200910116577 A CN 200910116577A CN 101549389 B CN101549389 B CN 101549389B
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- foundry goods
- casting method
- valve lever
- riser neck
- pouring
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Abstract
The present invention discloses a pouring apparatus and a casting method for a valve lever socket spanner, wherein the apparatus includes a mould cavity, a resin bonded sand core locating in the mouldcavity, and a riser head provided with a riser neck, characterized in that the riser neck biases a geometric thermal centre of a foundry goods; the casting method is that the tapping temperature of i ron liquid is from 1490 DEG C to 1510 DEG C, and the pouring temperature is from 1400 DEG C to 1450 DEG C. comparing with the present technology, the rate of qualified products is more than 95%, and the dimensional deviation and the weight deviation are all reduced.
Description
Technical field
The invention belongs to the apparatus for pouring method of sleeve type casting, belong to the apparatus for pouring and the casting method of the valve lever female spanner of spheroidal graphite cast-iron especially.
Background technology
At present, the apparatus for pouring of cast iron class valve lever female spanner comprises die cavity, resin sand core, is provided with rising head, the ingate of riser neck, and riser neck is positioned at how much thermal center places of foundry goods, and its feeding mode adopts consecutive solidification.The consecutive solidification feeding is by strengthening rising head and by riser neck foundry goods is taked strong feeding, not considering that riser neck contacts the influence to the actual setting time of thermal center of thermal center and thermal field with foundry goods formation.According to said method the casting product quality of Sheng Chaning is very unstable, percent defective is up to 20-25%, its reason is: have thermal center on the geometry of foundry goods 1., in process of setting, thermal center is later than other positions and solidifies, because solidification shrinkage, liquid contraction can not get the abundant feeding of iron liquid and easily produce shrinkage cavity in process of setting; 2. riser neck is over against the foundry goods thermal center, iron liquid is in the process that is full of entire sleeve class foundry goods die cavity, and the overheated time is long, has so just formed new contact thermal center, emerging contact thermal center is greater than how much original thermal centers, radiating condition is poor in addition, and setting time prolongs, and shrinks also to prolong thereupon, make existing rising head can not carry out effective feeding, this has just stayed shrinkage cavity at contact thermal center place, and shrinkage cavity mostly is irregular fine strip shape, and crystal grain is thick.
Summary of the invention
Technical problem to be solved by this invention provides the apparatus for pouring of the low valve lever female spanner of a kind of percent defective.
Another one technical problem to be solved by this invention is the casting method of above-mentioned foundry goods.
The technical scheme of technical solution problem of the present invention is: a kind of apparatus for pouring of valve lever female spanner comprises die cavity, is arranged in the resin sand core of die cavity, the rising head that is provided with riser neck, riser neck depart from foundry goods how much thermal centers and near thermal center.Die cavity hardness expands during with the opposing casting solidification greater than 85.
Described riser neck departs from the 20-50mm of foundry goods thermal center.
In order to reduce riser neck the heat of thermal center is disturbed, the riser neck sectional dimension is the 20-30% of how much thermal center sizes of foundry goods, and the sectional dimension of rising head is 1.2-1.5 a times of how much thermal centers of foundry goods.
A kind of casting method of valve lever female spanner, described iron liquid tapping temperature is at 1490-1510 ℃, pouring temperature is 1400-1450 ℃, by pouring temperature is controlled, reduce liquid amount of contraction, defectives such as while foundry goods tissue local crystal grain is thick, shrinkage porosite, shrinkage cavity, hot tearing have also obtained effective control.
The present invention compared with prior art, the accepted product percentage of product is more than 95%, simultaneously dimensional discrepancy and deviation of weight all have certain minimizing.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the structural representation of background technology of the present invention.
As shown in Figure 1, 2: 1 is that riser neck, 2 is that rising head, 3 is that resin sand core, 4 is that die cavity, 5 is thermal center.
The specific embodiment
Below in conjunction with embodiment the present invention is done detailed explanation.
As shown in Figure 2: existing apparatus for pouring comprises die cavity 4, resin sand core 3, is provided with rising head 2, the ingate of riser neck 1, riser neck 1 is basic identical with the level height of thermal center 5, riser neck 1 faces thermal center 5, make iron liquid in the process that is full of whole valve lever female spanner foundry goods die cavity, the overheated time is long, so just form new contact thermal center, caused shrinkage cavity.
As shown in Figure 1, the position of departing from how much thermal centers of foundry goods of the riser neck of apparatus for pouring of the present invention.Described riser neck departs from thermal center 20-50mm.The present invention makes riser neck avoid how much thermal centers of foundry goods, and the skew certain distance makes riser neck can play the effect of feeding, has prevented that again foundry goods tissue local crystal grain is thick or has produced generation of defects such as shrinkage porosite, shrinkage cavity, hot tearing.
Riser neck 1 sectional dimension of the present invention is 2cm
2, rising head 2 is of a size of 50mm to guarantee that rising head 2 is later than foundry goods and riser neck 1 solidifies, and has avoided the generation of the thick defective of crystal grain, has improved product yield, saves the metal and the energy.
Pouring procedure of the present invention: described iron liquid tapping temperature is at 1490-1510 ℃, pouring temperature is 1400-1450 ℃, by control to pouring temperature, reduce the amount of contraction of iron liquid liquid state, defectives such as while foundry goods tissue local crystal grain is thick, shrinkage porosite, shrinkage cavity, hot tearing have also obtained effective control.
Embodiment 1:
As shown in Figure 1: a kind of apparatus for pouring of sleeve type casting, comprise die cavity 4, be arranged in the position deviation foundry goods how much thermal center 30mm of the resin sand core 3 of die cavity 4, the rising head 2 that is provided with riser neck 1, riser neck 1, the hardness of die cavity is 85.
Embodiment 2:
Remove feeder neck 1 sectional dimension is 2cm
2, the sectional dimension of rising head 2 is outside the 50mm, all the other are identical with embodiment 1.
Embodiment 3:
Casting method of the present invention: described iron liquid tapping temperature is at 1500 ℃, and pouring temperature is 1420 ℃, and the product accepted product percentage of the valve lever female spanner that embodiment 1-3 is produced is more than 95%, and dimensional discrepancy and deviation of weight all have certain minimizing simultaneously.
Claims (3)
1. the casting method of a valve lever female spanner is characterized in that:
Iron liquid tapping temperature is at 1490-1510 ℃, and pouring temperature is 1400-1450 ℃;
The apparatus for pouring of valve lever female spanner, comprise die cavity, be arranged in die cavity resin sand core, be provided with the rising head of riser neck, riser neck departs from how much thermal centers of foundry goods.
2. the casting method of a kind of valve lever female spanner according to claim 1, it is characterized in that: the distance of described riser neck and foundry goods thermal center is 20-50mm.
3. the casting method of a kind of valve lever female spanner according to claim 1 is characterized in that: the riser neck sectional dimension is the 20-30% of how much thermal center sizes of foundry goods, the sectional dimension of rising head be how much thermal centers of foundry goods 1.2-1.5 doubly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101165778A CN101549389B (en) | 2009-04-20 | 2009-04-20 | Pouring apparatus and casting method for valve lever female spanner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101165778A CN101549389B (en) | 2009-04-20 | 2009-04-20 | Pouring apparatus and casting method for valve lever female spanner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101549389A CN101549389A (en) | 2009-10-07 |
| CN101549389B true CN101549389B (en) | 2011-04-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101165778A Expired - Fee Related CN101549389B (en) | 2009-04-20 | 2009-04-20 | Pouring apparatus and casting method for valve lever female spanner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101549389B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103111810A (en) * | 2013-02-19 | 2013-05-22 | 文登威力高档工具有限公司 | Manufacturing process and material of adjustable spanner blank |
| CN113351828A (en) * | 2021-05-24 | 2021-09-07 | 贵州安吉航空精密铸造有限责任公司 | Investment casting forming process for embedded ceramic core |
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2009
- 2009-04-20 CN CN2009101165778A patent/CN101549389B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101549389A (en) | 2009-10-07 |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110413 Termination date: 20170420 |