CN105921695A - Exhaust plug and casting process - Google Patents
Exhaust plug and casting process Download PDFInfo
- Publication number
- CN105921695A CN105921695A CN201610331452.7A CN201610331452A CN105921695A CN 105921695 A CN105921695 A CN 105921695A CN 201610331452 A CN201610331452 A CN 201610331452A CN 105921695 A CN105921695 A CN 105921695A
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- CN
- China
- Prior art keywords
- venting plug
- frustum
- core
- molding
- air discharge
- Prior art date
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/106—Vented or reinforced cores
Abstract
The invention discloses an exhaust plug used in casting of a sand core. The exhaust plug is arranged in an exhaust hole of a sand core forming mold; one end of an exhaust plug body is an opening, and multiple exhaust grooves are formed in the other end; the exhaust grooves communicate with the opening; the openingcommunicates with the exhaust hole of the mold; a frustum is arranged on the exhaust plug body at one end with the exhaust grooves; and the axial direction of the frustum is consistent with the mold opening direction of the sand core forming mold. The invention further discloses a casting process. The exhaust plug and the casting process can improve the casting quality and reduce the waste slag and air hole defects on the upper surface of a casting.
Description
Technical field
The present invention relates to casting field, particularly relate to the venting plug used during a kind of casting sand core, further relate to a kind of casting technique.
Background technology
Casting refers to solid metallic dissolves the casting mold pouring given shape for liquid into, treats the processing mode of its solidification forming.Castable
Metal has: copper, ferrum, aluminum, stannum, lead etc., and general mold material is roughing sand, clay, waterglass, resin and other auxiliary
Material.Core is a kind of common casting mold.
When core makes, due to cast-internal shape, the complexity of structure, the structure producing the core of foundry goods is caused also to complicate,
When producing core, the air at structure complexity is difficult to discharge, and occurs in that many is difficult to fill and be difficult to release place, causes
Core produces defective.At present, in order to improve the exhaust effect at core labyrinth, at structure complexity, employ venting plug,
General venting plug is cylinder, and side is provided with multiple tracks aerofluxus rib on the cylinder, is spaced a distance between aerofluxus rib and aerofluxus rib,
Forming certain space, when producing core, air can be discharged the interval between aerofluxus rib, solves core and is difficult to fill out
The problem filled.
But during casting, the high-temperature liquid metal after melting enters core and contacts, owing to making when making core
With some binding agents, firming agent, composition therein contains resin, and resin runs into high temperature will produce gas, also can be with producing
More raw impurity, how this type of impurity, due to gas trend and buoyancy, can float to foundry goods upper surface so that upper surface has
Waste residue and gas hole defect.
Summary of the invention
In view of above-mentioned, it is an object of the invention to provide a kind of venting plug and casting technique, for solving the pore of foundry goods upper surface
The technical problem that defect and waste residue are concentrated.
For achieving the above object, the present invention provides a kind of venting plug, is arranged in the steam vent of core mould, described aerofluxus
One end of plug main body is uncovered, and the other end offers multiple air discharge duct, and described air discharge duct uncovered connects with described, described uncovered and institute
State the steam vent connection of mould, the venting plug main body offer air discharge duct one end is provided with frustum, the axial and core of described frustum
The die sinking direction of mould is consistent.
As preferably, described frustum be cone angle be the circular frustum of 3 °～5 °.
As preferably, the height of described circular frustum is 15mm～20mm.
As preferably, described venting plug main body is cylinder, and described cylinder diameter is more than 10mm.
As preferably, basal diameter is venting plug main diameter about the 50% of described circular frustum.
As preferably, described air discharge duct is up-narrow and down-wide passage, and cross section is trapezoidal.
As preferably, the dual-side angle in described air discharge duct cross section is 6 °.
As preferably, the upper opening of described air discharge duct is 0.3mm.
As preferably, the described uncovered steam vent coaxial line with described mould.
A kind of casting technique, including core molding and foundry goods molding, steam vent during core molding, in the mould of molding core
On above-mentioned venting plug is set, core is when in-mold molding, due to the circular frustum of venting plug, corresponding core forms one
Inverted circular taper hole；During foundry goods molding, the molten metal after melting enters core, owing to the circular taper hole on core makes foundry goods
Surface formed correspondence metal frustum, in casting produce gas and impurity be concentrated in metal frustum；After foundry goods molding,
Cut unnecessary metal frustum.
The gas produced in forming process due to foundry goods and waste residue can move toward the upper surface of foundry goods, form defect at upper surface.
Do not change core mold planform, do not increase new form fit on the premise of, utilize the venting plug of the present invention at core
Upper formation conical bore, the foundry goods upper surface after molding correspondence can have more metal frustum, and the metal frustum having more is higher than cast(ing) surface,
The waste residue and the waste gas that produce in foundry goods forming process can move on metal frustum, so, just the defect of cast(ing) surface concentrated
On metal frustum, and finally cut the metal frustum containing waste residue and gas hole defect.
Using venting plug and the casting technique of the present invention, can improve casting quality, the minimizing waste residue of foundry goods upper surface, pore lack
Fall into.
Accompanying drawing explanation
Fig. 1 is shown as the structural representation of the venting plug of the embodiment of the present invention 1.
Fig. 2 is shown as the venting plug (there is angle in the circular axle center of frustum with the axle center of venting plug main body) of the embodiment of the present invention 1
Structural representation.
Fig. 3 is shown as the embodiment of the present invention, and the venting plug of 1 during core molding, uses venting plug to exist in embodiment 2 casting technique
Structural representation in core mold.
The structural representation of the aluminium alloy engine cylinder cap (band frustum) that Fig. 4 is shown as in the casting technique of the embodiment of the present invention 2.
The structural representation of the aluminium alloy engine cylinder cap (removal frustum) that Fig. 5 is shown as in the casting technique of the embodiment of the present invention 2
Figure.
Piece mark explanation
100 venting plugs,
101 venting plug main bodys,
102 is uncovered,
103 air discharge ducts,
104 frustums,
200 moulds,
201 steam vents,
300 aluminium alloy engine cylinder caps,
301 metal frustums.
Detailed description of the invention
Below by way of specific instantiation, embodiments of the present invention being described, those skilled in the art can be by disclosed by this specification
Content understand other advantages and effect of the present invention easily.The present invention can also be added by the most different detailed description of the invention
To implement or application, the every details in this specification can also be based on different viewpoints and application, in the essence without departing from the present invention
Various modification or change is carried out under god.
Embodiment 1
See Fig. 1, Fig. 2, the venting plug of the present embodiment, use stainless steel material to make, one end of venting plug main body 101 is spacious
Mouth 102, the other end offers multiple air discharge duct 103, and air discharge duct 103 connects with uncovered 102, uncovered 102 and the steam vent of mould
Connection, is provided with frustum 104 in the venting plug main body 101 offering air discharge duct 103 one end, axially becoming with core of frustum 104
The die sinking direction of mould is consistent.
Seeing Fig. 3, venting plug 100 is arranged in the steam vent 201 of core mould 200, produces when being used for discharging core molding
Raw gas.Air discharge duct 103 connects with uncovered 102, and uncovered 102 connect with the steam vent 201 of mould 200, for the ease of
Gas is discharged, uncovered 102 and steam vent 201 coaxial design.When specifically used venting plug 100, for the ease of the demoulding, protect
Demonstrate,prove the most consistent with the die sinking direction of core mould 200 of circular frustum 104.Thus, venting plug 100 is manufactured concrete
When, the axle center of circular frustum 104 and the axle center angle of venting plug main body 101, by the steam vent of core mould 200
The direction of 201 and die sinking direction determine (seeing Fig. 2).
Further, venting plug main body 101 is cylinder, and cylinder diameter is more than 10mm, typically venting plug master big for 10mm
Arranging the frustum of a cone 104 on body 101, otherwise, frustum 104 meeting blocking portion air discharge duct 103, causing can not aerofluxus completely.Frustum
104 are provided in round frustum, and cone angle is 3 °～5 °, and this angular range is more beneficial for the demoulding.The height of circular frustum 104
Degree is at 15mm～20mm.The basal diameter of circular frustum 104 is about the 50% of venting plug main body 101 diameter, air discharge duct 103
Upper opening is 0.3mm so that sand grains is not easily accessible in air discharge duct 103, and the size of sand grains is generally 0.25mm-0.30mm.Row
Air drain 103 is up-narrow and down-wide passage, and cross section is trapezoidal, and the dual-side angle in air discharge duct 103 cross section is 6 °.Due to aerofluxus
The structure influence of plug 103 itself, in process of production, sand grains easily blocks air discharge duct 103, needs often to change, reduces raw
Produce efficiency, increase maintenance cost.The design at 6 ° of oblique angles so that be partially into the tiny sand grains of air discharge duct 103, be not detained in
In air discharge duct 103, also allow for cleaning.Angle is the least, and venting plug easily blocks, and angle is too big, and venting plug insufficient strength is good.
Concrete, venting plug main body 101 diameter 10mm, high 10mm, uncovered 102 diameter 7.6mm, uncovered 102 deep 8mm,
Air discharge duct 103 be arranged 6 in parallel, air discharge duct 103 top width 0.3mm, and air discharge duct 103 dual-side angle is 6 °.Circular cone
The basal diameter 5mm of platform 104, cone angle is 3 °, the circular high 15mm of frustum 104.The axle center of circular frustum 104 and row
The axle center angle of vent plug main body 101 is 22.5 ° (seeing Fig. 2).
Embodiment 2
The casting technique of the present embodiment, mainly includes core molding and two steps of foundry goods molding, and have employed tool in embodiment 1
The venting plug that body describes.
During core molding, the steam vent 201 in the mould 200 of molding core arranging above-mentioned venting plug 100, core is at mould
In tool 200 during molding, due to the circular frustum 104 of venting plug 100, corresponding core forms an inverted circular taper hole；
During foundry goods molding, the molten metal after melting enters core, owing to the circular taper hole on core makes the surface of foundry goods form correspondence
Metal frustum 301 (can be found in Fig. 4), the gas and the impurity that produce in casting are concentrated in metal frustum 301；Foundry goods molding
After, cut unnecessary metal frustum 301.
The technique of concrete Cast aluminium alloy gold engine cylinder cover 300.
The first step, core molding:
1. see Fig. 3, design physical dimension according to engine cylinder cover, be prepared to the mould 200 of molding sand core.
2., according to vent bore 201 and the position of core, determine and select the venting plug in embodiment 1 or the aerofluxus without frustum
Plug.
3. move towards according to the steam vent 201 of mould and die sinking direction determines axle center and the venting plug of the circular frustum 104 of venting plug 100
The axle center angle of main body 101 22.5 °.
4. venting plug 100 correspondence is arranged in vent bore 201, then notes sand.Equipment choosing LAEMPE40SCHOOT
MACHINE L40, shooting pressure 5BAR, shooting time 4 seconds, blows amine firm time 25 seconds.
5. die sinking, takes out core.
Second step, foundry goods molding:
1. use above-mentioned core, Choose Die Casting Machine, inject the aluminum liquid after melting.Use gravitational casting, casting time 15s, stay
Mould time 170s.
2. take out aluminium alloy engine cylinder cap 300 foundry goods after cooling molding, removal core, see Fig. 4, aluminium alloy engine
The upper surface of cylinder cap 300 foundry goods forms the structure of the metal frustum 301 of circle.
3. use cutter sweep to cut away unnecessary metal frustum 301, obtain aluminium alloy engine cylinder cap 300 foundry goods, see figure
5。
The venting plug of the present embodiment is contained in the spring base supporting surface of aluminium alloy engine cylinder cap 300.Statistics spring base supporting surface, hole
Around there is a waste product number that shrinkage cavity causes:
Adding up 1000 products, wherein, waste product becomes 2 waste products from 12 waste products before, and percent defective is from from 1.2% fall
It is 0.2%.
The principle of above-described embodiment only illustrative present invention and effect thereof, not for limiting the present invention.Any it is familiar with this skill
Above-described embodiment all can be modified under the spirit and the scope of the present invention or change by the personage of art.Therefore, such as
All that in art, tool usually intellectual is completed under without departing from disclosed spirit and technological thought etc.
Effect is modified or changes, and must be contained by the claim of the present invention.
Claims (10)
1. venting plug, is arranged in the steam vent of core mould, and one end of described venting plug main body is uncovered, and the other end is offered
Multiple air discharge ducts, described air discharge duct uncovered connects with described, and described uncovered and described mould steam vent connects, its feature
Be, the venting plug main body offer air discharge duct one end be provided with frustum, described frustum axially and core mould
Die sinking direction is consistent.
Venting plug the most according to claim 1, it is characterised in that described frustum be cone angle be the circular frustum of 3 °～5 °.
Venting plug the most according to claim 2, it is characterised in that the height of described circular frustum is 15mm～20mm.
Venting plug the most according to claim 3, it is characterised in that described venting plug main body is cylinder, and described cylinder is straight
Footpath is more than 10mm.
Venting plug the most according to claim 4, it is characterised in that the basal diameter of described circular frustum is that venting plug main body is straight
About the 50% of footpath.
Venting plug the most according to claim 1, it is characterised in that described air discharge duct is up-narrow and down-wide passage, cross section is ladder
Shape.
Venting plug the most according to claim 6, it is characterised in that the dual-side angle in described air discharge duct cross section is 6 °.
Venting plug the most according to claim 7, it is characterised in that the upper opening of described air discharge duct is 0.3mm.
9. according to the arbitrary described venting plug of claim 1-8, it is characterised in that described uncovered and described mould steam vent is coaxial
Line.
10. a casting technique, including core molding and foundry goods molding, it is characterised in that during core molding, at the mould of molding core
Arranging the arbitrary described venting plug of claim 1～9 on steam vent in tool, core is when in-mold molding, due to aerofluxus
The circular frustum of plug, corresponding core is formed an inverted circular taper hole；During foundry goods molding, the molten metal after melting enters
Enter core, owing to the circular taper hole on core makes the surface of foundry goods form the metal frustum of correspondence, the gas produced in casting
Body and impurity are concentrated in metal frustum；After foundry goods molding, cut unnecessary metal frustum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610331452.7A CN105921695B (en) | 2016-05-18 | 2016-05-18 | Venting plug and a kind of casting technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610331452.7A CN105921695B (en) | 2016-05-18 | 2016-05-18 | Venting plug and a kind of casting technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105921695A true CN105921695A (en) | 2016-09-07 |
| CN105921695B CN105921695B (en) | 2018-05-04 |
Family
ID=56840791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610331452.7A Active CN105921695B (en) | 2016-05-18 | 2016-05-18 | Venting plug and a kind of casting technique |
Country Status (1)
| Country | Link |
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| CN (1) | CN105921695B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110405157A (en) * | 2018-04-28 | 2019-11-05 | 南阳飞龙汽车零部件有限公司 | A kind of casting installation method of venting plug |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10133325A1 (en) * | 2001-01-29 | 2002-08-01 | Kabushiki Kaisya Tsujii Seisak | Sand casting of metal mixes sand with setting agent filled into box to set into negative product shape finely machined in place to cast product shape. |
| CN201271727Y (en) * | 2008-09-18 | 2009-07-15 | 苏州勤美达精密机械有限公司 | Venting plug |
| CN202725967U (en) * | 2012-08-28 | 2013-02-13 | 天津久增金属有限公司 | Cast sand core print punching pneumatic pin device |
| CN103223462A (en) * | 2013-04-11 | 2013-07-31 | 芜湖乐锐思信息咨询有限公司 | Gas outlet needle capable of preventing sand falling |
| CN203265532U (en) * | 2013-04-28 | 2013-11-06 | 上海皮尔博格有色零部件有限公司 | Venting plug for foundry technique |
| CN204135299U (en) * | 2014-10-21 | 2015-02-04 | 安徽全柴天和机械有限公司 | A kind of mo(u)lding line venting machine air-out needle |
| CN205732835U (en) * | 2016-05-18 | 2016-11-30 | 上海皮尔博格有色零部件有限公司 | Venting plug |
-
2016
- 2016-05-18 CN CN201610331452.7A patent/CN105921695B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10133325A1 (en) * | 2001-01-29 | 2002-08-01 | Kabushiki Kaisya Tsujii Seisak | Sand casting of metal mixes sand with setting agent filled into box to set into negative product shape finely machined in place to cast product shape. |
| CN201271727Y (en) * | 2008-09-18 | 2009-07-15 | 苏州勤美达精密机械有限公司 | Venting plug |
| CN202725967U (en) * | 2012-08-28 | 2013-02-13 | 天津久增金属有限公司 | Cast sand core print punching pneumatic pin device |
| CN103223462A (en) * | 2013-04-11 | 2013-07-31 | 芜湖乐锐思信息咨询有限公司 | Gas outlet needle capable of preventing sand falling |
| CN203265532U (en) * | 2013-04-28 | 2013-11-06 | 上海皮尔博格有色零部件有限公司 | Venting plug for foundry technique |
| CN204135299U (en) * | 2014-10-21 | 2015-02-04 | 安徽全柴天和机械有限公司 | A kind of mo(u)lding line venting machine air-out needle |
| CN205732835U (en) * | 2016-05-18 | 2016-11-30 | 上海皮尔博格有色零部件有限公司 | Venting plug |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110405157A (en) * | 2018-04-28 | 2019-11-05 | 南阳飞龙汽车零部件有限公司 | A kind of casting installation method of venting plug |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105921695B (en) | 2018-05-04 |
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Address after: 1288 Xingxian Road, Jiading Industrial Zone, Shanghai, 201800 Patentee after: Huayu Pilberg Nonferrous Components (Shanghai) Co., Ltd. Address before: 201815 1288 Xingxian Road, Jiading Industrial Zone, Jiading District, Shanghai Patentee before: KOLBENSCHMIDT PIERBURG SHANGHAI NONFERROUS COMPONENTS CO., LTD. |
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