CN108115096A - A kind of shrinkage compensation method of template casting - Google Patents
A kind of shrinkage compensation method of template casting Download PDFInfo
- Publication number
- CN108115096A CN108115096A CN201711405603.XA CN201711405603A CN108115096A CN 108115096 A CN108115096 A CN 108115096A CN 201711405603 A CN201711405603 A CN 201711405603A CN 108115096 A CN108115096 A CN 108115096A
- Authority
- CN
- China
- Prior art keywords
- riser
- exothermic
- casting
- compensation method
- template
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
Abstract
The present invention relates to a kind of shrinkage compensation methods of template casting.The invention belongs to sand casting technical fields.A kind of shrinkage compensation method of template casting, its main feature is that：Exothermic riser and the chill of cooling capacity gradual change is used in combination in the shrinkage compensation method of template casting, one is created from the thermal center position of feeding is needed to the continuous solidification sequence of riser, exothermic riser is side riser, it is placed in template casting side, chill one end of cooling capacity gradual change is connected with exothermic riser, and the other end is connected with thermal center position, and exothermic riser contains exothermic mixture powder, extend liquid metals not setting time in exothermic riser, realize continuous feeding casting process.The present invention has that method is simple, and easy to operate, feeding efficiency is high, the advantages that significantly improving the qualification rate of plate-shaped members.
Description
Technical field
The invention belongs to sand casting technical field, more particularly to a kind of shrinkage compensation method of template casting.
Background technology
At present, in production practices, many waste product casting are caused by due to generating Shrinkage cavity, i.e. casting pouring
Afterwards, in process of setting, volume will reduce liquid metals, will be finally cold in casting if cannot get enough liquid to supplement
But place generates shrinkage porosite and shrinkage cavity, this problem of template casting is more prominent.
In the prior art, the casting of general wall thickness can meet the feeding of casting in casting using common sand mold riser
It is required that but as the increasing of casting and structure limit, especially casting large-scale flat part when, the feeding effect of common sand mold riser
Fruit is very poor, and feeding efficiency is less than 20%, and Shrinkage cavity problem is serious, and yield rate is very low, and loss is very big, as a result, large flat part
Feeding become one have the problem of to be solved.
The prior art is position by changing riser and prevents casting from generating Shrinkage cavity using chill, but due to casting
It is large flat part, if riser is placed in large flat part middle part, removes difficulty.If hammering method remove, easily band meat or
Larger riser residual is formed, is removed according to patterning method, because plate-shaped members size is big, it is difficult to clamp.(type is placed on using internal densener
Casting is easiest to generate the position of Shrinkage cavity inside chamber) feeding amount can be reduced, but internal densener can make cast properties uneven,
The defects of even bringing stomata, molding sand surface is placed in using external chill, is played chilling action, is quickly cooled down heat energy-saving position, this
Sample may only change the position for needing feeding, but can not reduce not contracting amount, can not improve feeding efficiency.
The content of the invention
The present invention is deposited to solve foundry enterprise in known technology using existing Resin Bonded Sand Technology production large flat part
Feeding it is difficult, cast-internal shrink defects is caused to be difficult to eradicate completely the problem of, and a kind of benefit of the template casting proposed
Contracting method.
Simple with method the object of the present invention is to provide one kind, easy to operate, feeding efficiency is high, significantly improves template
The shrinkage compensation method of the template casting of the features such as qualification rate of part.
Exothermic riser and the chill of cooling capacity gradual change is used in combination in the shrinkage compensation method of template casting of the present invention, creates one
A continuous solidification sequence from thermal center position (position for needing feeding) to riser.It is characterized in that the exothermic riser changes
For side riser, a side of plate-shaped members is placed in.It is further characterized in that the exothermic riser also has 10-30% exothermic mixtures
Powder occurs chemical reaction and releases substantial amounts of heat, protects liquid metals in riser when these exothermic mixtures are contacted with metal liquid
Holding the long period does not solidify, and realizes subsequent continuous feeding.
The chill of cooling capacity gradual change, one end are connected with exothermic riser, and the other end is connected with thermal center position, by steel material
It is made with refractory material, bottom is steel material, which is provided with multiple ventholes, and upper strata is refractory material, is connect with template casting
It touches, is in close contact between two layers.The refractory material includes the moulding of the prior art such as quartz sand, magnesia, bauxite and uses
Refractory material, the thickness in the one end being connected with riser are 22-100mm, are 5- in the thickness that one end is connected with thermal center area
15mm, one end that the thickness between both ends is connected from riser to thermal center position are continuously thinned.
The shrinkage compensation method of template casting of the present invention is adopted the technical scheme that：
A kind of shrinkage compensation method of template casting, its main feature is that：The shrinkage compensation method of template casting be used in combination exothermic riser and
The chill of cooling capacity gradual change, creating one, to the continuous solidification sequence of riser, fever emits from the thermal center position of feeding is needed
Mouth is side riser, is placed in template casting side, and chill one end of cooling capacity gradual change is connected with exothermic riser, the other end and heat
Position connection is saved, exothermic riser contains exothermic mixture powder, and extending liquid metals in exothermic riser, setting time, realization are not mended constantly
Contracting casting process.
The shrinkage compensation method of template casting of the present invention can also adopt the following technical scheme that：
The shrinkage compensation method of the template casting, its main feature is that：Exothermic riser contains the exothermic mixture powder of weight 10-30%
End, when exothermic mixture powder is contacted with metal liquid occur chemical reaction liberated heat, extend exothermic riser in liquid metals not
Setting time.
The shrinkage compensation method of the template casting, its main feature is that：The chill of cooling capacity gradual change, by steel material and fire resisting
Material is made, and bottom is steel material, which is provided with several ventholes, and upper strata is refractory material, is contacted with template casting.
The shrinkage compensation method of the template casting, its main feature is that：Refractory material is quartz sand, magnesia or bauxite moulding are used
Refractory material is connected the thickness of one end with exothermic riser as 22-100mm, and the thickness of one end is connected with thermal center position as 5-15mm,
One end that thickness between both ends is connected from exothermic riser to thermal center position is continuously thinned.
The invention has the advantages and positive effects that：
The shrinkage compensation method of template casting is as a result of the brand-new technical solution of the present invention, compared with prior art, this hair
It is bright that there is following evident characteristic：
1. riser is changed to side riser, convenient for tapping or cutting removal, ensure the surface quality of casting.
2. feeding efficiency is high.Using exothermic riser, make the liquid for there are enough heats to keep metal at riser, the benefit of riser
Contracting efficiency is up to more than 80%.
3. Feeding channel is unimpeded always.The present invention makes riser realize the continuous gradation of cooling capacity to feeding position, from
And ensure that always exist towards the widened Feeding channel of riser and the angle of flare, be not in the prior art because Feeding channel hinders
Plug interrupts and shrink defects occurs.
4. shrink defects incidence is close to zero.Invention can make shrink defects incidence be down to near-zero, significantly
Improve the qualification rate of plate-shaped members.
Description of the drawings
Fig. 1 is the shrinkage compensation method mould assembling structure diagram of template casting of the present invention.
In figure, 1- exothermic risers, 2- mo(u)ld top halves, 3- mo(u)ld bottom halves, 4- plate-shaped members cavity, 5- thermal centers area, 6- gas vents, 7- chills bottom
Layer (steel), 8- chills upper strata (refractory material), 9- riser necks.
Specific embodiment
In order to further understand the content, features and effects of the present invention, the following examples are hereby given, and coordinate attached drawing
Detailed description are as follows：
Refering to attached drawing 1.
Embodiment 1
A kind of shrinkage compensation method of template casting, by taking high chrome cast iron lining plate is cast as an example.Exothermic riser and cooling is used in combination
The chill of ability gradual change, creating one, to the continuous solidification sequence of riser, exothermic riser is from the thermal center position of feeding is needed
Side riser is placed in template casting side, and chill one end of cooling capacity gradual change is connected with exothermic riser, the other end and thermal center position
Put connection, exothermic riser contains exothermic mixture powder, extends in exothermic riser liquid metals not setting time, realizes continuous feeding casting
Make process.
Exothermic riser contains the exothermic mixture powder of weight 10%, and it is anti-that chemistry occurs when exothermic mixture powder is contacted with metal liquid
It answers liberated heat, extends in exothermic riser liquid metals not setting time.The chill of cooling capacity gradual change, by steel material and
Refractory material is made, and bottom is steel material, which is provided with several ventholes, and upper strata is refractory material, is contacted with template casting.
Refractory material is quartz sand, magnesia or bauxite moulding refractory material, and the thickness of one end is connected with exothermic riser
For 22mm, the thickness of one end is connected with thermal center position as 5mm, what the thickness between both ends was connected from exothermic riser to thermal center position
One end is continuously thinned.
Embodiment 2
A kind of shrinkage compensation method of template casting, by taking the casting of potassium steel jaw as an example.Exothermic riser and cooling energy is used in combination
The chill of power gradual change, creating one, to the continuous solidification sequence of riser, exothermic riser is side from the thermal center position of feeding is needed
Riser is placed in template casting side, and chill one end of cooling capacity gradual change is connected with exothermic riser, the other end and thermal center position
Connection, exothermic riser contain exothermic mixture powder, extend in exothermic riser liquid metals not setting time, realize continuous feeding casting
Process.
Exothermic riser contains the exothermic mixture powder of weight 20%, and it is anti-that chemistry occurs when exothermic mixture powder is contacted with metal liquid
It answers liberated heat, extends in exothermic riser liquid metals not setting time.The chill of cooling capacity gradual change, by steel material and
Refractory material is made, and bottom is steel material, which is provided with several ventholes, and upper strata is refractory material, is contacted with template casting.
Refractory material is magnesia, and the thickness of one end is connected with exothermic riser as 60mm, the thickness of one end is connected with thermal center position
It spends for 10mm, one end that the thickness between both ends is connected from exothermic riser to thermal center position is continuously thinned.
Embodiment 3
A kind of shrinkage compensation method of template casting, example is cast into antifriction alloy steel plate.Exothermic riser and cooling is used in combination
The chill of ability gradual change, creating one, to the continuous solidification sequence of riser, exothermic riser is from the thermal center position of feeding is needed
Side riser is placed in template casting side, and chill one end of cooling capacity gradual change is connected with exothermic riser, the other end and thermal center position
Put connection, exothermic riser contains exothermic mixture powder, extends in exothermic riser liquid metals not setting time, realizes continuous feeding casting
Make process.
Exothermic riser contains the exothermic mixture powder of weight 30%, and it is anti-that chemistry occurs when exothermic mixture powder is contacted with metal liquid
It answers liberated heat, extends in exothermic riser liquid metals not setting time.The chill of cooling capacity gradual change, by steel material and
Refractory material is made, and bottom is steel material, which is provided with several ventholes, and upper strata is refractory material, is contacted with template casting.
Refractory material is quartz sand, and the thickness of one end is connected with exothermic riser as 100mm, one end is connected with thermal center position
Thickness is 15mm, and one end that the thickness between both ends is connected from exothermic riser to thermal center position is continuously thinned.
The present embodiment is simple with the method, easy to operate, and feeding efficiency is high, significantly improves the qualification of plate-shaped members
The good effects such as rate.
Claims (4)
1. a kind of shrinkage compensation method of template casting, it is characterized in that：Exothermic riser and cold is used in combination in the shrinkage compensation method of template casting
But the chill of ability gradual change creates one from the thermal center position of feeding is needed to the continuous solidification sequence of riser, exothermic riser
For side riser, template casting side is placed in, chill one end of cooling capacity gradual change is connected with exothermic riser, the other end and thermal center
Position connects, and exothermic riser contains exothermic mixture powder, extends in exothermic riser liquid metals not setting time, realizes continuous feeding
Casting process.
2. the shrinkage compensation method of template casting according to claim 1, it is characterized in that：Exothermic riser contains weight 10-30%
Exothermic mixture powder, when exothermic mixture powder is contacted with metal liquid occur chemical reaction liberated heat, extend exothermic riser in
Liquid metals not setting time.
3. the shrinkage compensation method of template casting according to claim 1 or 2, it is characterized in that：The chill of cooling capacity gradual change, by
Steel material and refractory material are made, and bottom is steel material, which is provided with several ventholes, and upper strata is refractory material, with plate
Type casting contacts.
4. the shrinkage compensation method of template casting according to claim 1 or 2, it is characterized in that：Refractory material is quartz sand, magnesia
Or bauxite moulding refractory material, the thickness of one end is connected with exothermic riser as 22-100mm, one end is connected with thermal center position
Thickness for 5-15mm, one end that the thickness between both ends is connected from exothermic riser to thermal center position is continuously thinned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711405603.XA CN108115096A (en) | 2017-12-22 | 2017-12-22 | A kind of shrinkage compensation method of template casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711405603.XA CN108115096A (en) | 2017-12-22 | 2017-12-22 | A kind of shrinkage compensation method of template casting |
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| Publication Number | Publication Date |
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| CN108115096A true CN108115096A (en) | 2018-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201711405603.XA Pending CN108115096A (en) | 2017-12-22 | 2017-12-22 | A kind of shrinkage compensation method of template casting |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109954857A (en) * | 2019-04-26 | 2019-07-02 | 共享装备股份有限公司 | The fixing tool and fixing means of 3D printing sand mold chill |
| CN114713800A (en) * | 2022-03-21 | 2022-07-08 | 陕西飞机工业有限责任公司 | Solid metal feeding method for thick and large casting |
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| GB497628A (en) * | 1938-01-07 | 1938-12-22 | United Eng Foundry Co | Improvements in or relating to the manufacture of mill rolls and the like from metal which shrinks on cooling |
| CN101134227A (en) * | 2006-08-29 | 2008-03-05 | 中信重型机械公司 | Grinder shell cover casting method |
| CN102962397A (en) * | 2012-11-02 | 2013-03-13 | 浙江双金机械集团股份有限公司 | Casting mold of conical sand maker breaking wall and casting process |
| CN103212672A (en) * | 2013-03-15 | 2013-07-24 | 马钢(集团)控股有限公司 | Method for casting low speed diesel engine cylinder cap for large cylinder diameter boat |
| CN103949618A (en) * | 2014-05-07 | 2014-07-30 | 沈阳工业大学 | Casting heat-recovery and temperature-control chilling block and cooling method of heat recovery |
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| GB497628A (en) * | 1938-01-07 | 1938-12-22 | United Eng Foundry Co | Improvements in or relating to the manufacture of mill rolls and the like from metal which shrinks on cooling |
| CN101134227A (en) * | 2006-08-29 | 2008-03-05 | 中信重型机械公司 | Grinder shell cover casting method |
| CN102962397A (en) * | 2012-11-02 | 2013-03-13 | 浙江双金机械集团股份有限公司 | Casting mold of conical sand maker breaking wall and casting process |
| CN103212672A (en) * | 2013-03-15 | 2013-07-24 | 马钢(集团)控股有限公司 | Method for casting low speed diesel engine cylinder cap for large cylinder diameter boat |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109954857A (en) * | 2019-04-26 | 2019-07-02 | 共享装备股份有限公司 | The fixing tool and fixing means of 3D printing sand mold chill |
| CN109954857B (en) * | 2019-04-26 | 2021-08-31 | 共享装备股份有限公司 | Fixing tool and fixing method for chill for 3D printing sand mold |
| CN114713800A (en) * | 2022-03-21 | 2022-07-08 | 陕西飞机工业有限责任公司 | Solid metal feeding method for thick and large casting |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180605 |