CN106807898A - Highly-breathable heat preservation rising head and preparation method thereof - Google Patents
Highly-breathable heat preservation rising head and preparation method thereof Download PDFInfo
- Publication number
- CN106807898A CN106807898A CN201710034285.4A CN201710034285A CN106807898A CN 106807898 A CN106807898 A CN 106807898A CN 201710034285 A CN201710034285 A CN 201710034285A CN 106807898 A CN106807898 A CN 106807898A
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- Prior art keywords
- rising head
- heat preservation
- highly
- aluminium
- breathable heat
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Classifications
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- 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
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/18—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents
- B22C1/186—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents contaming ammonium or metal silicates, silica sols
- B22C1/188—Alkali metal silicates
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a kind of highly-breathable heat preservation rising head and preparation method thereof, the highly-breathable heat preservation rising head is prepared from by the raw material of following percentage by weight：It is prepared from by the raw material of following percentage by weight：Aluminium powder 15 20%, aluminium skimmings 10 15%, insulation material 40 55%, potassium nitrate 5 10%, sodium silicate binder 5 15%.The core shooting plate of the core shooter used in heat preservation rising head preparation process of the invention is double-layer aluminium alloy, and sets exhaust plug structure in the periphery of double-layer aluminium alloy.Rising head core print seat cracking of the invention is reduced to less than 3%, no longer influences rising head application intensity, and mould breakage rate to greatly reduce, and the no longer excessive reduction material viscosity that relies on ensures mobility so as to reach high efficiency qualification rate high.
Description
Technical field
The invention belongs to field of mechanical technique, and in particular to applied in machine casting technique, more particularly to casting technique
High tenacity, highly-breathable heating core shooting insulated feeder.
Background technology
Casting rising head refers to expect contraction when supplementing casting solidification, being designed with preventing the defects such as shrinkage cavity and porosity
Part.Rising head is not casting body, to be got rid of during cleaning, and it also has exhaust, the function of collection slag.
It is to use to be embedded in molding sand for ting model casting, as more than current Foundry Works, causes casting operating mode poor, consumes
When, and increase casting cost.And user is had been look for without the rising head of molding sand, find to start single increase often in experimentation
Warm intensity does not always reach requirement, and by verifying that this is mistaken ideas, and on the basis of normal temperature strength, increase gas permeability is only with toughness
Most rational scheme.And there are the following problems in rising head preparation process：The mobility of material with viscosity mutually conflict, gas permeability and
Intensity conflicts, and mobility mutually conflicts with shaping qualification rate, and contradiction is more between batch mixing hilllock and shaping hilllock.Additionally, in the prior art,
The core print seat rate easy to crack of 14/17K rising heads is up to more than 70%, high to raw material particle size compatibility dependence, and many raw mineral materials grains
Footpath fluctuation is larger, and many suppliers are unable to reach requirement, when serious, or even cannot produce.
Accordingly, it would be desirable to a kind of high tenacity, highly-breathable heat preservation rising head, to solve the above problems.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of high tenacity, highly-breathable heat preservation rising head, solve existing
There is rising head toughness not enough, easily cracking, not enough problem of generating heat meets the feeding requirement of casting, so as to improve going out for steel-casting
Product rate.
In order to solve the above technical problems, the technical scheme of offer of the invention is, highly-breathable heat preservation rising head, its by
The raw material of following percentage by weight is prepared from：Aluminium powder 15-20%, aluminium skimmings 10-15%, insulation material 40-55%, potassium nitrate 5-
10%th, sodium silicate binder 5-15%.
In a preferred technical scheme of the invention, the insulation material is selected from perlite, grey floating bead, asbestos fibre, wood
One or more material in matter fiber；Preferably grey floating bead, 20-270 mesh, its floatability is more than 95%.
In a preferred technical scheme of the invention, the sodium silicate binder is sodium water sodium silicate binder, the sodium
Water sodium silicate binder Baume degrees 49-51, modulus 2.0-3.5.
In a preferred technical scheme of the invention, the aluminium powder particle diameter 30-270 mesh, wherein+200 purposes are not more than
10%, -200 mesh are not less than 90%, and aluminium content is more than 99%.
In a preferred technical scheme of the invention, the aluminium skimmings particle diameter 20-270 mesh, wherein 20 mesh are less than 3%, 270 mesh
5-10%, aluminium content is more than 99%.
Highly-breathable heat preservation rising head, it is prepared from by the raw material of following percentage by weight：Aluminium powder 15-19%, aluminium
Bits 11-15%, grey floating bead 45-50%, potassium nitrate 5-7%, sodium silicate binder 10-15%.
Highly-breathable heat preservation rising head, it is prepared from by the raw material of following percentage by weight：Aluminium powder 19%, aluminium skimmings
15%th, grey floating bead 50%, potassium nitrate 5%, sodium silicate binder 11%.
The second aspect of the present invention provides a kind of preparation method of highly-breathable heat preservation rising head, and it includes following step
Suddenly：
(1) aluminium powder, aluminium skimmings, insulation material, potassium nitrate are weighed in proportion, are sufficiently stirred for being premixed, then be proportionally added into
Sodium silicate binder is mixed, and obtains material A；
(2) be molded in mould in material A being put into core shooter, the demoulding,
(3) Riser material after stripping forming is carried out into baking and curing shaping, finally rising head corner is cleared up, carried out
Inspection and packaging.
In a preferred technical scheme of the invention, the core shooting plate of the core shooter is double-layer aluminium alloy, and in Double-layer aluminum
The periphery of alloy sets exhaust plug structure.
In a preferred technical scheme of the invention, the exhaust plug structure is contacting with each other in the double-layer aluminium alloy
The groove structure formed between face.
In a preferred technical scheme of the invention, in the step (3), in 160-190 DEG C of batch-type furnace drying 60-
120min carries out curing molding.
In a preferred technical scheme of the invention, in the step (3), in 150-190 DEG CSui roads kiln dryings 30-
60min carries out curing molding.
Tests prove that, rising head core print seat cracking of the invention reduces 95%, and a small amount of crack is also slight, is no longer influenceed
Rising head application intensity, and mould breakage rate greatly reduces, no longer excessive dependence reduce material viscosity and ensure mobility so as to reach
To high efficiency qualification rate high.Rising head gas permeability of the invention, good toughness, light weight 2-3%, gas permeability, good toughness, combustibility
Good, application conditions are not easy to crack, and casting qualified rate is by 89% lifting to 98%.
Brief description of the drawings
The rising head base profile that Fig. 1 is prepared for the core shooter of prior art.
Fig. 2 is the surface structure schematic diagram of the core shooting plate of one embodiment of the invention.
Fig. 3 is the rising head base profile that formula of the invention and core shooter are prepared.
Fig. 4 is the surface structure schematic diagram of the core shooting plate of one embodiment of the invention.
Fig. 5 is the side schematic appearance of the core shooting plate of one embodiment of the invention.
Fig. 6 is the gas permeability of the rising head formula, the riser openings end that preparation technology is prepared and bottom of prior art
Compare.
Fig. 7 is the comparing of the gas permeability of rising head formula of the invention, the riser openings end that preparation technology is obtained and bottom.
The rising head that Fig. 8 is the rising head formula of prior art, preparation technology is obtained with rising head formula of the invention, preparation technology
Intensity contrast.
The rising head that Fig. 9 is the rising head formula of prior art, preparation technology is obtained with rising head formula of the invention, preparation technology
Core print seat cracking rate is contrasted.
Figure 10 prepares the flow chart of rising head for the core shooter of the core shooting plate of prior art.
Figure 11 is that the core shooter for being provided with core shooting plate of the invention prepares the flow chart of rising head.
Specific embodiment
Such scheme is described further below in conjunction with specific embodiment.It should be understood that these embodiments are for illustrating
The present invention rather than limitation the scope of the present invention.The implementation condition used in embodiment can be done according to the condition of specific producer
Further adjustment, unreceipted implementation condition is usually the condition in normal experiment.
The present invention by way of example rather than provides the mode of limitation and illustrates.It should be noted that in present disclosure
Described " one " or " one kind " implementation method is not necessarily referring to same specific embodiment, and refers at least a kind of.
Various aspects of the invention are described below.However, as will be readily apparent to one of skill in the art, can
Only some or all of aspects of the invention implement the present invention.For purposes of illustration, be given herein specific numbering, material and
Configuration, enables one to thoroughly understand the present invention.However, be evident that for those of skill in the art,
The present invention can be implemented without concrete details.In other examples, not make, the present invention is obscure to be omitted or simplified many institutes
Known feature.
Various operations are described successively as multiple discrete steps, and with most helpful in understanding side of the invention
Formula is illustrated；However, in-order description should not be construed as to imply that into these operations are necessarily dependent on order.
Various implementation methods will be illustrated according to the reactant of type species.To show for those of skill in the art and
It is clear to, the present invention can be used any number of different types of reactant to implement, and is more than those for the purpose of illustration
And the reactant for being given herein.Additionally, be also evident that, the invention is not limited in any specific mixing is shown
Example.
The side schematic appearance of the core shooting plate of one embodiment of the invention as shown in Figure 4.Make in preparation method of the present invention
Core shooting plate 1 is made up of two-layer aluminium alloy 11,12, can be connected two-layer aluminium alloy by welding or riveting, and in institute
The periphery for stating double-layer aluminium alloy 11,12 sets the structure of venting plug 13.The structure of the venting plug 13 can be the double-layer aluminium alloy 11,
12 contact with each other the groove structure formed on face.
And the core shooting plate of prior art is a Rotating fields, and without exhaust plug structure.Use prior art as shown in Figure 10
The core shooter of core shooting plate prepare the flow chart of rising head, because core shooting plate does not have steam vent in its periphery, so forming process pair
Material fluidity requirement is high；Rising head bottom needs manually to be compacted with hand, and patted with iron plate.And finally prepare
There were significant differences for the gas permeability at the position up and down of rising head, the good permeability of openend, the poor air permeability of bottom, as shown in Figure 1.It is existing
Have in technology, because the packing at upper and lower position during rising head curing molding is different, cause the core print seat of rising head easily to ftracture.It is right
The formula material being formulated in high intensity, high tenacity relatively glues, and poor fluidity original core shooting plate is unable to reach normal use requirement.
And core shooting plate 1 of the invention is that, by two-layer aluminium alloy 11,12 compositions have side exhaust (plug) hole, as shown in Figure 5.
When material and compressed air are injected in mould from core shooter hopper by core shooting plate, openend air-flow can be discharged from below,
The air-flow of rising head bottom can be discharged from side exhaust (plug) hole of core shooting plate, thus during rising head curing molding, because up and down
The packing difference at position less, substantially overcomes all problems of the core shooting plate of prior art, it is adaptable to all rising heads into
Type.Particularly, it is less demanding for formula powder, it is not necessary to stirring is carried out in preparation process.Rising head bottom is not required to manually
Pat, it is just relatively more plain, as shown in Figure 3.
Reference examples
By according to the technique of the formula of prior art and core shooting plate, rising head is prepared as shown in Figure 10, to its openend
With the comparing that bottom carries out gas permeability.Data are as shown in table 1 and Fig. 6.
Table 1
| Gas permeability batch | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Riser openings end | 71 | 72 | 69 | 67 | 71 | 66 | 70 | 73 | 71 | 69 |
| Rising head bottom | 60 | 61 | 58 | 55 | 67 | 50 | 49 | 71 | 58 | 61 |
The preparation of the highly-breathable heat preservation rising head of embodiment 1
(1) claim by mass percentage：Aluminium powder 19%, aluminium skimmings 11%, grey floating bead 50%, potassium nitrate 7%, are sufficiently stirred for carrying out
After premix 5-20min, sodium silicate binder 13% is added, carry out mixing 5-10min, prepare batch mixing；
(2) shaping and demoulding is carried out in mould under pressure 6-8kg in foregoing batch mixing being put into core shooter, it is described
The core shooting plate of core shooting plate is that double-layer aluminium alloy band is vented plug structure,
(3) by the Riser material after stripping forming in 190 DEG C of batch-type furnaces, drying 90min carries out curing molding, after drying
Rising head corner is cleared up, is finally tested and packaging.
To be formulated according to embodiment 1 and rising head that technique is prepared carries out the ratio of gas permeability to its openend and bottom
Compared with.Data are as shown in table 2 and Fig. 7.
Table 2
| Gas permeability batch | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Riser openings end | 95 | 98 | 94 | 97 | 96 | 99 | 90 | 92 | 97 | 98 |
| Rising head bottom | 91 | 92 | 89 | 95 | 94 | 90 | 96 | 94 | 97 | 91 |
The preparation of the highly-breathable heat preservation rising head of embodiment 2
(1) claim by mass percentage：Aluminium powder 15%, aluminium skimmings 15%, grey floating bead 50%, potassium nitrate 7%, are sufficiently stirred for carrying out
After premix 5-20min, adding 13% sodium silicate binder carries out mixing 5-10min, prepares batch mixing；
(2) shaping and demoulding is carried out in mould under pressure 6-8kg in foregoing batch mixing being put into core shooter, it is described
The core shooting plate of core shooting plate is that double-layer aluminium alloy band is vented plug structure,
(3) by the Riser material after stripping forming in 150-190 DEG CSui roads kiln, drying 30-60min is solidified into
Type, clears up rising head corner after drying, finally tests and packaging.
The preparation of the highly-breathable heat preservation rising head of embodiment 3
(1) claim by mass percentage：Aluminium powder 19%, aluminium skimmings 12%, grey floating bead 45%, potassium nitrate 10%, be sufficiently stirred for into
After row premix 5-20min, adding 14% sodium silicate binder carries out mixing 5-10min, prepares batch mixing；
(2) shaping and demoulding is carried out in mould under pressure 6-8kg in foregoing batch mixing being put into core shooter, it is described
The core shooting plate of core shooting plate is that double-layer aluminium alloy band is vented plug structure,
(3) Riser material after stripping forming is carried out into baking and curing shaping, rising head corner is cleared up after drying, most
After test and packaging.
By the formula of the rising head prepared according to the formula and technique of embodiment 3 and prior art and use prior art
Core shooting plate the rising head for preparing of core shooter, carry out intensity comparing, data are as shown in table 3 and Fig. 8：
Table 3
Additionally, the rising head that formula of the invention and process are prepared, is prepared into prior art formula and technique
To rising head core print seat cracking rate compare, as shown in Figure 9 only 3.0%, substantially reduce.
Examples detailed above technology design and feature only to illustrate the invention, its object is to allow person skilled in the art to be
Will appreciate that present disclosure and implement according to this, it is not intended to limit the scope of the present invention.It is all smart according to the present invention
Equivalent transformation or modification that refreshing essence is done, should all be included within the scope of the present invention.
Claims (10)
1. highly-breathable heat preservation rising head, it is prepared from by the raw material of following percentage by weight：Aluminium powder 15-20%, aluminium skimmings
10-15%, insulation material 40-55%, potassium nitrate 5-10%, sodium silicate binder 5-15%.
2. highly-breathable heat preservation rising head according to claim 1, it is characterised in that the insulation material is selected from pearl
One or more material in rock, grey floating bead, asbestos fibre, wood fibre.
3. highly-breathable heat preservation rising head according to claim 1, it is characterised in that the sodium silicate binder is sodium
Water sodium silicate binder.
4. highly-breathable heat preservation rising head according to claim 1, it is characterised in that the aluminium powder particle diameter 30-270
Mesh, wherein+200 purposes are not more than 10%, -200 mesh are not less than 90%, and aluminium content is more than 99%.
5. highly-breathable heat preservation rising head according to claim 1, it is characterised in that the aluminium skimmings particle diameter 20-270
Mesh, wherein 20 mesh are less than 3%, 270 mesh 5-10%, aluminium content is more than 99%.
6. the method for preparing the highly-breathable heat preservation rising head as described in claim 1-5, it comprises the following steps：
(1) aluminium powder, aluminium skimmings, insulation material, potassium nitrate are weighed in proportion, is sufficiently stirred for being premixed, then be proportionally added into water glass
Glass binding agent is mixed, and obtains material A；
(2) be molded in mould in material A being put into core shooter, the demoulding,
(3) Riser material after stripping forming is carried out into baking and curing shaping, finally rising head corner is cleared up, tested
With packaging.
7. preparation method according to claim 6, it is characterised in that the core shooting plate of the core shooter is double-layer aluminium alloy,
And set exhaust plug structure in the periphery of double-layer aluminium alloy.
8. preparation method according to claim 6, it is characterised in that the exhaust plug structure is in the double-layer aluminium alloy
The face that contacts with each other between formed groove structure.
9. preparation method according to claim 6, it is characterised in that in step (3), in 160-190 DEG C of batch-type furnace, drying
60-120min carries out curing molding.
10. preparation method according to claim 6, it is characterised in that in step (3), in 150-190 DEG CSui roads kiln,
Drying 30-60min carries out curing molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710034285.4A CN106807898A (en) | 2017-01-18 | 2017-01-18 | Highly-breathable heat preservation rising head and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710034285.4A CN106807898A (en) | 2017-01-18 | 2017-01-18 | Highly-breathable heat preservation rising head and preparation method thereof |
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| Publication Number | Publication Date |
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| CN106807898A true CN106807898A (en) | 2017-06-09 |
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|---|---|---|---|
| CN201710034285.4A Pending CN106807898A (en) | 2017-01-18 | 2017-01-18 | Highly-breathable heat preservation rising head and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108296446A (en) * | 2018-01-25 | 2018-07-20 | 宁夏共享能源有限公司 | Casting incubation riser of persistent fever and preparation method thereof |
| CN108723302A (en) * | 2018-08-15 | 2018-11-02 | 山东大学 | A kind of spheroidal graphite cast-iron heat preservation riser and preparation method thereof |
| CN110732630A (en) * | 2019-11-25 | 2020-01-31 | 武汉绿之美铸造材料有限公司 | inorganic composite adhesive for casting exothermic riser |
| CN113084078A (en) * | 2021-03-19 | 2021-07-09 | 维苏威铸造科技(江苏)有限公司 | High ventilative heat preservation rising head |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108296446A (en) * | 2018-01-25 | 2018-07-20 | 宁夏共享能源有限公司 | Casting incubation riser of persistent fever and preparation method thereof |
| CN108723302A (en) * | 2018-08-15 | 2018-11-02 | 山东大学 | A kind of spheroidal graphite cast-iron heat preservation riser and preparation method thereof |
| CN110732630A (en) * | 2019-11-25 | 2020-01-31 | 武汉绿之美铸造材料有限公司 | inorganic composite adhesive for casting exothermic riser |
| CN113084078A (en) * | 2021-03-19 | 2021-07-09 | 维苏威铸造科技(江苏)有限公司 | High ventilative heat preservation rising head |
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Application publication date: 20170609 |