CN109848368A - Sand mold casting mold and casting method - Google Patents
Sand mold casting mold and casting method Download PDFInfo
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- CN109848368A CN109848368A CN201711236858.8A CN201711236858A CN109848368A CN 109848368 A CN109848368 A CN 109848368A CN 201711236858 A CN201711236858 A CN 201711236858A CN 109848368 A CN109848368 A CN 109848368A
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Abstract
The invention discloses a kind of sand mold casting mold and its casting methods, the cooling device of the sand mold casting mold is located on the side wall at the thermal center region of the casting type chamber of the mold, wherein, according to the temperature change of the thermal center, it is horizontal that the cooling device adjusts Quench, the Quench level is higher, and the temperature reducing rate of the thermal center is faster.Sand mold casting mold of the invention can be avoided in casting process the problem of solution stops, and the surface hot tearing of process of setting medium casting the problem of.It can ensure different size of thermal center while solidify, solve the problems, such as Shrinkage Porosity, shrinkage cavity.
Description
Technical field
The present invention relates to sand casting fields, and in particular to a kind of sand mold casting mold and casting method.
Background technique
In sand casting, due to casting structure and casting parameter, in the iron of the molten condition of the intracavitary each point of type
Water setting time be it is unequal, this generates thermal center, i.e. for molten iron in process of setting, the solidification of casting internal ratio surrounding metal is slow
Slow node or regional area.
It is magnesium iron for castings material, gray iron etc. realizes casting of the casting from feeding by the expansion of Graphite Precipitation
Material, since ironcasting has the precipitation of graphite in process of setting, the volume expansion of graphite can be supplemented since ironcasting is solidifying
Admittedly volume when shrinking reduces, therefore ironcasting may be implemented from feeding.
But due to the presence of thermal center, casting inhomogeneous cooling is even, there is the time of Graphite Precipitation successively, to make graphite
Lose feeding capacity, the defects of casting will appear shrinkage porosite, shrinkage cavity, cold shut, stomata.These defects in casting structure complexity almost
It not can avoid.
In order to overcome drawbacks described above, the prior art generallys use, and ingate is arranged far from thermal center region, and in thermal center area
Domain increases the mode of setting insulated feeder and/or chill.This scheme has the disadvantage in that for complicated casting, institute
It needs riser quantity larger, causes the cost of disposable riser head heat-preserving material to increase, improve production cost；Solution casting is not can guarantee
The shrinkage porosite problem of part, casting process still have shrinkage defect.
Summary of the invention
The purpose of the present invention is to provide a kind of casting moulds that ironcasting while solidification may be implemented and corresponding casting
Method, to thoroughly solve the problems, such as Shrinkage Porosity, shrinkage cavity.
The cooling device of sand mold casting mold according to the first embodiment of the present invention, the sand mold casting mold is located at institute
It states on the side wall at the thermal center region of the casting type chamber of mold, wherein according to the temperature change of the thermal center, the cooling device
It is horizontal to adjust Quench, the Quench level is higher, and the temperature reducing rate of the thermal center is faster.
Further, the ingate of the mold is located at the region that thermal center is distributed in the casting type chamber.
Further, the ingate of the mold is located at the thermal center region in the middle part of the casting type chamber.
Further, there are multiple ingates, the distance between described ingate is between 0.5m to 0.8m.
Further, the cooling device includes: chill, heat-conducting part and control unit；Wherein, the heat-conducting part is included in institute
The cooling fluid tank stating the cooling duct opened up in chill and being connected with the cooling duct；With the control unit according to the chill
The temperature sensor of interior setting controls the heat-conducting part.
Sand mold mould casting method described in second embodiment according to the present invention, in the casting type chamber of the mold
Cooling device is set on side wall at thermal center region, wherein according to the temperature change of the thermal center, the cooling device, which is adjusted, to swash
Cold water is flat, and the Quench level is higher, and the temperature reducing rate of the thermal center is faster.
Further, ingate is set in the region that thermal center is distributed in the casting type chamber.
Further, ingate is arranged in the thermal center region in the middle part of the casting type chamber.
Further, multiple ingates are set, and the distance between described ingate is between 0.5m to 0.8m.
Further, the cooling device includes: chill, heat-conducting part and control unit；Wherein, the heat-conducting part is included in institute
The cooling fluid tank stating the cooling duct opened up in chill and being connected with the cooling duct；With the control unit according to the chill
The temperature sensor of interior setting controls the heat-conducting part.
Compared with prior art, the main distinction and its effect are embodiment of the present invention:
Sand mold casting mold of the invention can be avoided the problem of solution stops in casting process, and in process of setting
The problem of cast(ing) surface hot tearing.It can ensure different size of thermal center while solidify, solve the problems, such as Shrinkage Porosity, shrinkage cavity.
Further, in such a way that thermal center is concentrated, reduce thermal center distribution, what reduction adjusted casting solidification temperature
Difficulty, and reduce production cost.
Further, sand mold casting mold of the invention can reduce the difficulty adjusted to intricate casting setting temperature,
The dosage of ingate tubing can be reduced, production cost is reduced.
Detailed description of the invention
Fig. 1 shows the schematic diagram of sand mold casting mold according to an embodiment of the present invention.
Fig. 2 shows the structural schematic diagrams at the chill end of the cooling device of exemplary according to an embodiment of the present invention.
Fig. 3 A shows the cooling device of exemplary according to an embodiment of the present invention and the contrast schematic diagram of existing chill.
Fig. 3 B shows the cooling device of exemplary according to an embodiment of the present invention and the thermal center cooling effect of existing chill
Contrast schematic diagram.
Fig. 4 shows the schematic diagram of sand mold casting mold according to another embodiment of the present invention.
Specific embodiment
To keep purpose and the technical solution of the embodiment of the present invention clearer, below in conjunction with the attached of the embodiment of the present invention
Figure, is clearly and completely described the technical solution of the embodiment of the present invention.Obviously, described embodiment is of the invention
A part of the embodiment, instead of all the embodiments.Based on described the embodiment of the present invention, those of ordinary skill in the art
Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of being not necessarily to creative work.
In order to facilitate the embodiment of the present invention is understood, the element introduced in embodiment description is introduced herein first:
Multi-step ironcasting: a kind of ironcasting that structure is relative complex, multi-step, the i.e. casting are made of multiple steps.
Since there are step structure, the casting section thickness at each step can be inconsistent with the wall thickness of casting around, and inside each step
Also there can be the inconsistent place of wall thickness.
Fig. 1 shows the schematic diagram of sand mold casting mold according to an embodiment of the present invention.
Specifically, as shown in Figure 1, the periphery of sand mold casting mold 10 is sandbox 11, the hollow space among sandbox 11
For casting type chamber 12, it is ingate 13 that casting type chamber 12, which leads to the channel outside sandbox 11, and cooling device 14 is located at casting type chamber
On the side wall in 12 thermal center regions.
As depicted in figs. 1 and 2, cooling device 14 includes chill 141, heat-conducting part 142 and control unit 143.It is filled due to cooling
It is horizontal to set adjustable Quench, the size of chill 141 can be relatively small.Heat-conducting part 142 include opened up in chill 141 it is cold
But channel 1421 and the cooling fluid tank 1422 being connected with cooling duct 1421 can be placed with cooling water, oil in cooling fluid tank 1422
Or the cooling mediums such as gas.Control unit 143 includes control unit 1431 and connect with control unit 1431, is located in chill 141
Temperature sensor 1432, the one side which is in contact close to chill 141 with casting type chamber 12.Control unit
The work of the 143 temperature control heat-conducting parts 142 obtained according to temperature sensor 1432, enables cooling device 14 to adjust itself
Quench is horizontal.
It is appreciated that the Quench level of existing chill is related with the size of its own, the identical chill of material, size is got over
Greatly, Quench level is higher, and cooling effect is better.In order to make thermal center cool down, it will usually using the horizontal high chill of Quench, but it is cold
But the excessively high chill of ability may cause casting solution by stopping when chill region at the beginning of pouring.And
In process of setting, since cooling capacity is excessively high, since temperature gradient is too big hot tearing occurs for casting in chill edge, such as schemes
In 3A shown in left-hand component.
With existing chill on the contrary, cooling device 14 can be horizontal with sectional-regulated Quench.Specifically, as shown in Fig. 3 A right part,
Temperature sensor 1432 obtains the temperature in thermal center region, control unit 143 according to the temperature of acquisition before cast(ing) surface crust the
One stage control heat-conducting part 142 does not work.So, when heat-conducting part 142 does not work, the Quench level of cooling device is by chill
141 determine that, because the size of chill 141 is smaller, cooling level is limited, so cooling device 14 not will lead to casting solution and break
Stream.When temperature sensor 1432 measures a period of time that casting temperature is reduced to 1120 DEG C, such as after five minutes, i.e., in casting table
Second stage after the crust of face, control unit 143 control heat-conducting part 142 and work.Since cast(ing) surface has crusted, so that casting table
Surface hardness improves, and thermal center can not only be reduced but also effectively avoid the generation of hot tearing by this moment carrying out Quench.
Fig. 3 B shows the cooling device of exemplary according to an embodiment of the present invention and the thermal center cooling effect of existing chill
Contrast schematic diagram.As shown in Figure 3B, wherein leftschematic diagram indicates that the cooling effect of existing chill, right side schematic view indicate
The cooling effect of cooling device 14 in embodiment in mold 10, grayscale colour atla indicates solidification rate in figure, and gray scale is higher to indicate solidifying
Gu rate is lower.From in Fig. 3 it can be found that size two can not be made using existing chill for two different size of thermal centers in figure
A thermal center solidifies simultaneously, and cooling device 14 is horizontal by the way that reasonable Quench is arranged, it can be ensured that two thermal centers of size coagulate simultaneously
Gu.
Specifically, the control list of such as PLC (Programmable Logic Controller, " programmable controller ")
Member 1431 passes through the temperature of coolant in control heat-conducting part 142, in the flow of cooling duct 1421, pressure and coolant circulation
The modes such as duration are horizontal come the Quench for controlling cooling device 14.Horizontal by adjusting Quench, cooling device 14 can control
The modulus of thermal center keeps the modulus of the modulus and the other positions of casting at thermal center equal, to achieve the purpose that while solidify.
Further, ingate 13 is located at the region that thermal center is distributed in casting type chamber 12.
Since gate location will appear thermal center, existing sand mold mould, which usually avoids for cast gate being mounted on casting type chamber, to be distributed with
The region of thermal center, can strengthen thermal center effect in this way, increase cooling difficulty, and existing chill also can not do not occur cutout or
The thermal center of concentration is effectively handled under the premise of hot tearing.
On the contrary, according to an embodiment of the invention, the ingate 13 of sand mold casting mold 10 is located at the distribution of casting type chamber 12
After having the region of thermal center, such thermal center to concentrate, the difficulty adjusted to casting solidification temperature can be reduced, reduces cooling device 14
It arranges quantity, reduces cost.
Sand mold casting mold 10 according to an embodiment of the present invention is described in detail above in association with Fig. 1 to Fig. 3, below in conjunction with
Fig. 4 describes sand mold casting mold according to another embodiment of the present invention.
Fig. 4 shows the schematic diagram of sand mold casting mold according to another embodiment of the present invention.
As shown in figure 4, mold 40 is the mold of the multi-step casting of complex wall thickness, and in mold 40, ingate 421,422
Positioned at the thermal center 43 of the medium position of casting type chamber 41.In this way, the temperature of the molten iron at upper step and lower step is lower, compared with
Hardly possible forms biggish thermal center 43, and the temperature difference between upper step and lower step molten iron is smaller, reduces to casting solidification
The difficulty that temperature is adjusted.At this moment, even if thermal center is still arranged at top or lower part, the lesser common chill of cooling velocity can be used still to solve
Certainly simultaneously freezing problem.For intricate casting, the dosage of ingate tubing can also be reduced in this way, reduce production cost.
Further, it is less than 1m positioned at the distance between the ingate 421,422 in middle part thermal center region.
The effective range that cooling device 14 can act on is in 0.4m or so, therefore, when between ingate 421,422 without thermal center
When, the distance between cast gate can be 0.8m；When there is more complicated thermal center between cast gate, need to shorten between two cast gates
Distance arrives 0.5m or so.It is maintained at ingate in 0.5m to 0.8m distance, neither influence cooling device is to the cold of thermal center
But effect, and the quantity of cooling device and ingate can be reduced, the dosage of ingate tubing is reduced, production cost is reduced.
Second embodiment of the present invention discloses a kind of sand mold mould casting method.
Cooling device is set on the side wall at the thermal center region of the casting type chamber of model, wherein according to the temperature of thermal center
Variation, cooling device adjust Quench level, and Quench level is higher, and the temperature reducing rate of thermal center is faster.
Further, ingate is set in the region that thermal center is distributed in casting type chamber.
Further, ingate is arranged in the thermal center region in the middle part of casting type chamber.
Further, the distance between ingate is set between 0.5m to 0.8m.
Further, cooling device includes: chill, heat-conducting part and control unit；Wherein, heat-conducting part includes opening up in chill
Cooling duct and the cooling fluid tank that is connected with cooling duct；It is led with control unit according to the temperature sensor control being arranged in chill
Hot portion.
First embodiment is the mold manufactured by present embodiment, and present embodiment can be mutual with first embodiment
Cooperation is implemented.The relevant technical details mentioned in first embodiment are still effective in the present embodiment, in order to reduce repetition,
Which is not described herein again.
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom", "inner", "outside" is orientation based on the figure or position
Relationship is set, is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning are necessary
It with specific orientation, is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
In the description of the present invention, unless otherwise specified and limited, it should be noted that term " installation ", " connected ",
" connection ", " connection ", " connection " shall be understood in a broad sense, for example, it may be mechanical attachment or electrical connection, are also possible to two elements
Internal connection, can be directly connected, can also indirectly connected through an intermediary, for those of ordinary skill in the art
For, the concrete meaning of above-mentioned term can be understood as the case may be.
This document describes some embodiments, including best mode for carrying out the present invention known for inventor.Certainly, lead to
Reading foregoing description is crossed, the modification of these embodiments will be apparent to those of ordinary skill in the art.This hair
The expected technical staff of bright people can optionally use these modifications, and the inventors expect that the present invention can be specific herein to be different from
The mode is implemented.Thus, specification and claims are included in appended right according to applicable law is permitted like that
The all modifications form and equivalent form of theme described in claim.In addition, specification and claims cover its it is all can
Any combination of above-mentioned element in energy modification, unless otherwise indicated herein or context is clearly contradicted.
Finally, it is to be understood that presently disclosed embodiment is the example to the principle of the invention.Other adoptable modifications
Form is also within the scope of the invention.Therefore, by way of example rather than limit, can according to the teaching of this article content it is another to utilize
Select configuration.Therefore, the present invention is not limited to clearly shown in and the content.
Claims (10)
1. a kind of sand mold casting mold, which is characterized in that cooling device is located at the thermal center region of the casting type chamber of the mold
Side wall on, wherein according to the temperature change of the thermal center, the cooling device adjusts that Quench is horizontal, and the Quench level is got over
The temperature reducing rate of height, the thermal center is faster.
2. sand mold casting mold according to claim 1, which is characterized in that the ingate of the mold is located at the casting
The region of thermal center is distributed in type chamber.
3. sand mold casting mold according to claim 1, which is characterized in that the ingate of the mold is located at the casting
Thermal center region in the middle part of type chamber.
4. sand mold casting mold according to claim 2 or 3, which is characterized in that there are multiple ingates, it is described interior
The distance between cast gate is between 0.5m to 0.8m.
5. sand mold casting mold according to claim 1-4, which is characterized in that the cooling device includes: cold
Iron, heat-conducting part and control unit；
Wherein, the heat-conducting part includes the cooling duct opened up in the chill and the coolant that is connected with the cooling duct
Case；With
The control unit controls the heat-conducting part according to the temperature sensor being arranged in the chill.
6. a kind of sand mold mould casting method, which is characterized in that the side wall at the thermal center region of the casting type chamber of the mold
Upper setting cooling device, wherein according to the temperature change of the thermal center, the cooling device adjusts Quench level, the Quench
Horizontal higher, the temperature reducing rate of the thermal center is faster.
7. sand mold mould casting method according to claim 6, which is characterized in that thermal center is distributed in the casting type chamber
Region be arranged ingate.
8. sand mold mould casting method according to claim 6, which is characterized in that the thermal center in the middle part of the casting type chamber
Ingate is arranged in region.
9. sand mold mould casting method according to claim 7 or 8, which is characterized in that the multiple ingates of setting, institute
The distance between ingate is stated between 0.5m to 0.8m.
10. according to the described in any item sand mold mould casting methods of claim 6-9, which is characterized in that the cooling device packet
It includes: chill, heat-conducting part and control unit；
Wherein, the heat-conducting part includes the cooling duct opened up in the chill and the coolant that is connected with the cooling duct
Case；With
The control unit controls the heat-conducting part according to the temperature sensor being arranged in the chill.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711236858.8A CN109848368A (en) | 2017-11-30 | 2017-11-30 | Sand mold casting mold and casting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711236858.8A CN109848368A (en) | 2017-11-30 | 2017-11-30 | Sand mold casting mold and casting method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110259941A (en) * | 2019-07-16 | 2019-09-20 | 合肥江淮铸造有限责任公司 | Final drive casing shift fork pore structure |
| CN110586904A (en) * | 2019-09-20 | 2019-12-20 | 六丰金属科技（昆山）有限公司 | Aluminum alloy long arm part production mould |
| CN112387928A (en) * | 2020-10-29 | 2021-02-23 | 湖北理工学院 | Sand mold casting process method and casting equipment |
| TWI794638B (en) * | 2020-08-18 | 2023-03-01 | 財團法人金屬工業研究發展中心 | Method and system for determining solidification hot spots of cast workpiece and casting feeder design methiod |
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| CN202427895U (en) * | 2011-12-31 | 2012-09-12 | 上海爱仕达汽车零部件有限公司 | Gravity casting cavity die |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110259941A (en) * | 2019-07-16 | 2019-09-20 | 合肥江淮铸造有限责任公司 | Final drive casing shift fork pore structure |
| CN110586904A (en) * | 2019-09-20 | 2019-12-20 | 六丰金属科技（昆山）有限公司 | Aluminum alloy long arm part production mould |
| CN110586904B (en) * | 2019-09-20 | 2021-03-02 | 六丰金属科技（昆山）有限公司 | Aluminum alloy long arm part production mould |
| TWI794638B (en) * | 2020-08-18 | 2023-03-01 | 財團法人金屬工業研究發展中心 | Method and system for determining solidification hot spots of cast workpiece and casting feeder design methiod |
| CN112387928A (en) * | 2020-10-29 | 2021-02-23 | 湖北理工学院 | Sand mold casting process method and casting equipment |
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Application publication date: 20190607 |