CN109773135A - Light-type sand core and preparation method thereof - Google Patents
Light-type sand core and preparation method thereof Download PDFInfo
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- CN109773135A CN109773135A CN201910136611.1A CN201910136611A CN109773135A CN 109773135 A CN109773135 A CN 109773135A CN 201910136611 A CN201910136611 A CN 201910136611A CN 109773135 A CN109773135 A CN 109773135A
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Abstract
A kind of light-type sand core or sand mold are that engraved structure is equipped at the entity part of the non-casting type chamber in the sand core or sand mold, and minimum mold thickness D of the engraved structure apart from sand core or sand mold outer surface and apart from sand core or sand mold upper impression meets the requirement of formula one.The formula one are as follows: The thickness of the defeated and dispersed layer of sand mold is linear proportional relationship with casting section thickness namely the thickness of the defeated and dispersed layer of the sand mold is thickened with the increase of casting section thickness.The present invention is arranged engraved structure by the entity part in sand mold and/or sand core and forms the light-type sand mold, to realize sand mold or sand core low consumption material, low cost；It is equipped with the sand mold or sand core of the engraved structure simultaneously, also there is better heat-conducting effect, so that the sand core or sand mold have preferable cooling rate, shortens the shake out time of casting.
Description
Technical field
The present invention relates to casting technology fields, more specifically to sand core for casting or sand mold.
Background technique
In sand casting technology, the type chamber of sand core and sand mold to form casting, molten metal condenses formation in type chamber
Casting.Because molding sand is not involved in casting, in casting industry, molding sand is divided into auxiliary material, and molding sand is that dosage is maximum auxiliary
Material needs to reduce being produced into for sand core and sand mold as far as possible with the requirement of casting accuracy and environment and the pressure of production cost
This, and the production cost of sand core and sand mold is reduced, it is most directly exactly the usage amount for reducing placer iron ratio, namely reducing molding sand,
And reduce molding sand usage amount when, with an opposite influence be the physics such as the intensity that can reduce sand core and sand mold, rigidity spy
Property, when the casting that the physical characteristic of sand mold and/or sand core is not able to satisfy molten metal requires, underproof casting will be cast out
Part in turn results in more wastes of resource.The low cost and enough physical characteristics for how realizing sand core and/or sand mold, are capable
It is constantly looking in the industry.
Summary of the invention
It is mutually rushed between sand core and/or sand mold physical characteristic greatly in view of the above sand mold and/or sand core production with molding sand amount
Prominent problem, it is necessary to propose a kind of light-type sand mold and preparation method thereof, the light-type sand mold not only realizes sand using amount
It is small, while ensure that the physical characteristic of sand core and/or sand mold, it ensure that qualified castings production.Sand core and sand in text below
Type indicates chiltern model, replaceable to use.
A kind of light-type sand core or sand mold are to be equipped with to engrave at the entity part of the non-casting type chamber in the sand core or sand mold
Hollow structure, the engraved structure are full apart from sand core or sand mold outer surface and apart from sand core or the minimum mold thickness D of sand mold upper impression
The requirement of sufficient formula one.The formula one are as follows: the defeated and dispersed layer+max of D=sand moldIt is public
In formula one, d is casting section thickness, d1For mold thickness, d needed for sand mold hydrostatic pressure resistant power2For mold thickness needed for the anti-graphite expansion power of sand mold
(d2Calculation formula be the G. Iron Castings for nodular iron casting；When casting is gray iron casting, d2Value be 0), H be hydrostatic pressing
Highly, L is the maximum outreach of engraved structure, and above each variable is length variable, and unit is consistent, as unit is equal
It is millimeter (symbol: mm) for rice (symbol: m) or unit.
The thickness of the defeated and dispersed layer of sand mold is linear proportional relationship with casting section thickness namely the thickness of the defeated and dispersed layer of the sand mold
Degree is thickened with the increase of casting section thickness.
A kind of light-type sand core or sand mold the preparation method comprises the following steps:
S001 cuts the threedimensional model for meeting casting structure for sand mold and/or sand core according to production process；
Engraved structure is arranged in the entity part of sand mold and/or sand core in S002, and the thickness of the entity part should be not less than
Twice of the minimum mold thickness D；
S003 produces sand mold described in S002 by the way of increasing material manufacturing or by the way of quicksand moulding, coremaking
And/or sand core.
Beneficial effects of the present invention: the present invention is arranged engraved structure by the entity part in sand mold and/or sand core and is formed
The light-type sand mold, to realize sand mold or sand core low consumption material, low cost；It is equipped with the sand of the engraved structure simultaneously
Type or sand core also have better heat-conducting effect, so that the sand core or sand mold have preferable cooling rate, shorten casting
Shake out time；On the other hand, institute is also added by the way that the engraved structure is arranged for the entity sand mold or sand core of big thickness
The deformability of sand core or sand mold is stated, to reduce casting stress, casting caused by avoiding therefore is unqualified.
Detailed description of the invention
Fig. 1 is the corresponding relationship chart of the defeated and dispersed layer of sand mold and casting section thickness；
Fig. 2 is one honeycomb type sandwich sand mold schematic diagram of embodiment；
Fig. 3 is one honeycomb sandwich construction enlarged diagram of embodiment；
Fig. 4 is that embodiment two imitates ring engraved structure sand mold schematic diagram；
In figure, 1- sand mold；2- honeycomb interlayer；3- type chamber；4- ring engraved structure；5- sand removal channel.
Specific embodiment
In order to illustrate more clearly of technical solution of the present invention, will be described in detail according to figure embodiment, it is aobvious and easy
Insight, the accompanying drawings in the following description are exemplary embodiments of the invention, for those of ordinary skill in the art, are not being paid
Under the premise of creative work, it is also possible to obtain other drawings based on these drawings.
Sand mold as described herein, during die modeling, also referred to as moulding, the moulding namely the sand with sandbox
Type, sand mold and sand core are after structure hardening, to remove the chiltern model that mold is formed made of mold quicksand.The moulding,
On sand mold and sand core or the outer profile with casting or the Internal periphery with casting or i.e. the Internal periphery with casting with
The Internal periphery of casting, the moulding, sand mold and sand core can form complete casting cavity structure after the assembly of type core, namely
The shape and structure of casting.Verbal description below uniformly substitutes moulding and sand core with sand mold, with reduction language.
The light-type sand mold that the present invention designs, be by no casting type chamber entity part be arranged engraved structure, and
The periphery of the engraved structure is not less than one resulting value of formula to the minimum mold thickness D of entire sand mold outer surface and/or type chamber, public
Formula one:In formula one, d is casting wall
Thick, d1For mold thickness, d needed for sand mold hydrostatic pressure resistant power2For mold thickness (d needed for the anti-graphite expansion power of sand mold2Calculation formula be
The G. Iron Castings for nodular iron casting；When casting is gray iron casting, d2Value be 0), H be hydrostatic pressing height, L is hollow out knot
The maximum outreach of structure, above each variable is length variable, and unit is consistent, as unit be rice (symbol: m) or
Unit is millimeter (symbol: mm).As shown in Figure 1, the thickness and casting section thickness of the defeated and dispersed layer of sand mold in the formula one are at line
The thickness of property proportional relationship namely the defeated and dispersed layer of the sand mold is thickened with the increase of casting section thickness.
Embodiment one: honeycomb type sandwich sand mold
As shown in Fig. 2, for a sand mold with internal cavity, it can be with technical solution according to the invention, in type chamber 3 and sand
The engraved structure of several honeycomb interlayers 2 is set in the entity part between the surface of type 1, wherein the periphery of the honeycomb interlayer 2
Meet the requirement of formula one at a distance from the type chamber 3 of the distance between outer surface of sand mold 1 and the honeycomb interlayer 2 and sand mold 1.
More specifically, in order to promote the extruding force of the anti-metal liquid of the honeycomb interlayer 2 expansion, on the one hand, will be in the honeycomb interlayer 2
Honeycomb be set as regular hexagon, and each cellular side length is 20mm~100mm, for example, when on sand mold 1 type chamber 3 (namely
Casting section thickness) when being 50mm, the defeated and dispersed layer with a thickness of 0.04mm, cellular side length is 35mm；On the other hand, by the bee
Several honeycombs in nest interlayer 2 are arranged according to array, and the gap not less than 5mm is equipped between each honeycomb, to enhance
The intensity of the honeycomb interlayer 2 itself, can also promote the entire compression ability of the honeycomb interlayer 2.Finally, in order to further mention
The anti-pressure ability of the honeycomb interlayer 2 is risen, it can be in the rounded corner of each cellular edges and corners setting R3~R10.
Several honeycomb interlayers are set by sand mold entity part shown in Fig. 2, by the weight saving of the sand mold
About 20%, then the cost for allowing for producing this sand mold accordingly reduces about 20%.For generally, by entity part
The honeycomb sandwich construction is set, original sand mold can be mitigated 15%~30%, the production cost of sand mold can also dropped
Low 15%~30%.This measure considerably reduces the usage amount of molding sand, not only reduced by only the usage amount of consumptive material, while also making
The molding sand amount for obtaining thermal reclamation is reduced, and decreases the energy consumption of thermal reclamation molding sand.
Embodiment two: imitative ring engraved structure sand mold
It is illustrated in figure 4 an entity sand core for being used to form core cavity structure, in order to mitigate the weight of the entity sand core
Molding sand dosage is measured and saved, imitative ring engraved structure can be set in the entity part of the entity sand core.Specifically meeting
Under the premise of the minimum mold thickness of formula one, the ring hollow out knot of three section structures is provided in the entity part of the sand core
The ring engraved structure 4 of structure 4, three section structures reduces section by section from one end of the sand core to the one end for being equipped with type chamber 3, namely
The ring engraved structure 4 is set as the growth direction from described sand core one end to the other end equipped with type chamber 3 for bamboo, thus
It ensure that the integral strength of the sand core.Meanwhile in order to which the loose sand in the ring engraved structure 4 is smoothly cleaned out institute
Sand core is stated, several sand removal channels 5 are equipped between every section ring.More specifically, in order to increase the anti-of the ring engraved structure 4
Reinforcing rib is arranged along week on the cavity inner wall of each ring in extrusion capability；Simultaneously in the height side of the ring cavity
Upwards, one reinforcing rib can be set every 50mm~100mm；It can also set the corner of the ring cavity to the circle of R5
Chamfering.
By the way that the imitative ring engraved structure is arranged on entity sand core shown in Fig. 4, so that the weight of the sand core subtracts
Light about 35% namely one sand core of every production can save the molding sand of the moon 30%.With regard to this technical solution, namely in reality
The imitative ring engraved structure is arranged on body sand core can save 20%~40% molding sand amount, to realize the light weight of sand core
Change.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, those skilled in the art can understand all or part of the processes for realizing the above embodiment, and wants according to right of the present invention
Made equivalent variations is sought, is still belonged to the scope covered by the invention.
Claims (8)
1. a kind of light-type sand core, which is characterized in that engraved structure, the engraved structure is arranged in the entity part of the sand core
With at a distance from sand core or mould surface and the engraved structure at a distance from the type chamber on sand core not less than minimum mold thickness D, institute
Minimum mold thickness D is stated to meet
2. light-type sand core as described in claim 1, which is characterized in that the thickness and casting section thickness of the defeated and dispersed layer of sand mold at
Linear proportional relationship.
3. a kind of preparation method of light-type sand core, which is characterized in that the preparation method includes:
The threedimensional model for meeting casting structure is cut according to production process as sand mold and/or sand core；
Engraved structure is set in the entity part of sand mold and/or sand core, the thickness of the entity part should be not less than twice of institute
State minimum mold thickness D.
4. light-type sand core as described in claim 1, which is characterized in that the engraved structure is honeycomb interlayer, the honeycomb
Interlayer is equipped with several in the entity part.
5. light-type sand core as claimed in claim 4, which is characterized in that equipped with several regular hexagons in the honeycomb interlayer
Honeycomb, and the cellular side length of the regular hexagon is 20mm~100mm.
6. light-type sand core as claimed in claim 5, which is characterized in that be equipped between the regular hexagon honeycomb and be not less than 5mm
Gap.
7. light-type sand core as described in claim 1, which is characterized in that the engraved structure is imitative ring engraved structure, institute
The quantity for stating ring is determined according to the physical length of sand core.
8. light-type sand core as claimed in claim 7, which is characterized in that the inner wall of the ring engraved structure is equipped with several
Reinforcing rib, the spacing between the reinforcing rib is 50mm~100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910136611.1A CN109773135A (en) | 2019-02-25 | 2019-02-25 | Light-type sand core and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910136611.1A CN109773135A (en) | 2019-02-25 | 2019-02-25 | Light-type sand core and preparation method thereof |
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| Publication Number | Publication Date |
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| CN109773135A true CN109773135A (en) | 2019-05-21 |
Family
ID=66486998
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| CN201910136611.1A Pending CN109773135A (en) | 2019-02-25 | 2019-02-25 | Light-type sand core and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111085667A (en) * | 2019-12-30 | 2020-05-01 | 清华大学 | Design method of smooth inner cavity of hollow casting mold or hollow sand core |
| CN113263135A (en) * | 2021-05-24 | 2021-08-17 | 沈阳铸造研究所有限公司 | Spatial gridding printing method for 3D printing sand mold |
| CN113385639A (en) * | 2021-04-29 | 2021-09-14 | 西安交通大学 | Design method of variable wall thickness sand mold structure for controlling microstructure of casting in targeted manner and variable wall thickness sand mold structure |
| CN113458339A (en) * | 2021-06-09 | 2021-10-01 | 山东大学 | Core structure for sand casting, manufacturing method and mold comprising core |
| CN115090831A (en) * | 2022-06-14 | 2022-09-23 | 南京航空航天大学 | Composite material special-shaped revolving body forming method based on 3D printing lightweight sand mold |
| CN115726743A (en) * | 2021-08-26 | 2023-03-03 | 中国石油天然气集团有限公司 | Alternately distributed bidirectional honeycomb ventilation water-blocking sand-proof short joint |
| WO2024178932A1 (en) * | 2023-03-02 | 2024-09-06 | 南京航空航天大学 | Frozen sand mold hollowed conformal design and low-temperature medium transmission freeze forming method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111085667A (en) * | 2019-12-30 | 2020-05-01 | 清华大学 | Design method of smooth inner cavity of hollow casting mold or hollow sand core |
| CN113385639A (en) * | 2021-04-29 | 2021-09-14 | 西安交通大学 | Design method of variable wall thickness sand mold structure for controlling microstructure of casting in targeted manner and variable wall thickness sand mold structure |
| CN113263135A (en) * | 2021-05-24 | 2021-08-17 | 沈阳铸造研究所有限公司 | Spatial gridding printing method for 3D printing sand mold |
| CN113263135B (en) * | 2021-05-24 | 2023-02-17 | 沈阳铸造研究所有限公司 | Spatial grid printing method for 3D printing sand mold |
| CN113458339A (en) * | 2021-06-09 | 2021-10-01 | 山东大学 | Core structure for sand casting, manufacturing method and mold comprising core |
| CN113458339B (en) * | 2021-06-09 | 2022-07-15 | 山东大学 | Core structure for sand casting, manufacturing method and mold comprising core |
| CN115726743A (en) * | 2021-08-26 | 2023-03-03 | 中国石油天然气集团有限公司 | Alternately distributed bidirectional honeycomb ventilation water-blocking sand-proof short joint |
| CN115090831A (en) * | 2022-06-14 | 2022-09-23 | 南京航空航天大学 | Composite material special-shaped revolving body forming method based on 3D printing lightweight sand mold |
| WO2024178932A1 (en) * | 2023-03-02 | 2024-09-06 | 南京航空航天大学 | Frozen sand mold hollowed conformal design and low-temperature medium transmission freeze forming method |
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Application publication date: 20190521 |
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