CN105921695B - Venting plug and a kind of casting technique - Google Patents
Venting plug and a kind of casting technique Download PDFInfo
- Publication number
- CN105921695B CN105921695B CN201610331452.7A CN201610331452A CN105921695B CN 105921695 B CN105921695 B CN 105921695B CN 201610331452 A CN201610331452 A CN 201610331452A CN 105921695 B CN105921695 B CN 105921695B
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- frustum
- venting plug
- sand core
- casting
- air discharge
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses the venting plug used during a kind of casting sand core, it is arranged in the exhausting-gas hole of sand core molding die, one end of the venting plug main body is opening, the other end opens up multiple air discharge ducts, the air discharge duct is connected with the opening, the open exhausting-gas hole with the mould connects, and frustum is equipped with the venting plug main body for open up air discharge duct one end, and the axial direction of the frustum is consistent with the die sinking direction of sand core molding die.A kind of casting technique is also disclosed, using the venting plug and casting technique of the present invention, casting quality can be improved, reduce waste residue, the gas hole defect of casting upper surface.
Description
Technical field
The present invention relates to casting field, more particularly to the venting plug used during a kind of casting sand core, a kind of casting is further related to
Technique.
Background technology
Cast and refer to dissolving solid metallic into the casting mold for pouring into given shape for liquid, treat the processing side of its solidification forming
Formula.Can ingot metal have：Copper, iron, aluminium, tin, lead etc., general mold material is roughing sand, clay, waterglass, resin and other are auxiliary
Help material.Sand core is a kind of common casting mold.
When sand core makes, due to cast-internal shape, the complexity of structure, cause the structure for producing the sand core of casting also complicated
Change, when producing sand core, the air at complicated place is difficult to discharge, and many occurs and is not easy to fill and is not easy release place,
Cause sand core production unqualified.At present, in order to improve the exhaust effect at sand core labyrinth, row has been used at complicated place
Vent plug, general venting plug are cylinder, and side is equipped with multiple tracks exhaust rib on the cylinder, is spaced between exhaust rib and exhaust rib certain
Distance, form certain space, when producing sand core, air can from exhaust rib between interval in discharge, solve sand
The problem of core is not easy to fill.
But during casting, the high-temperature liquid metal after melting is contacted into sand core, due to making sand
Some binding agents, curing agent are used during core, component therein contains resin, and resin, which runs into high temperature, will produce gas, also can
Some impurity are supervened, such impurity can float to casting upper surface so that upper table more due to gas trend and buoyancy
There are waste residue and gas hole defect in face.
The content of the invention
In view of it is above-mentioned, it is an object of the invention to provide a kind of venting plug and casting technique, for solving casting upper surface
Gas hole defect and waste residue concentrate technical problem.
To achieve the above object, the present invention provides a kind of venting plug, is arranged in the exhausting-gas hole of sand core molding die, described
One end of venting plug main body is opening, and the other end opens up multiple air discharge ducts, and the air discharge duct is connected with the opening, the opening
Connected with the exhausting-gas hole of the mould, frustum, the axial direction of the frustum are equipped with the venting plug main body for open up air discharge duct one end
It is consistent with the die sinking direction of sand core molding die.
Preferably, the circular frustum that it is 3 °~5 ° that the frustum, which is cone angle,.
Preferably, the height of the circle frustum is 15mm~20mm.
Preferably, the venting plug main body is cylinder, the cylinder diameter is more than 10mm.
Preferably, the basal diameter of the circle frustum is 50% or so of venting plug main diameter.
Preferably, the air discharge duct is up-narrow and down-wide passage, section is trapezoidal.
Preferably, the two sides angle of the exhaust slot cross-section is 6 °.
Preferably, the upper opening of the air discharge duct is 0.3mm.
Preferably, the described open and exhausting-gas hole coaxial line of the mould.
A kind of casting technique, including sand core shaping and casting shaping, when sand core is molded, the row in the mould of shaping sand core
Above-mentioned venting plug is set on stomata, and sand core is in in-mold molding, due to the circular frustum of venting plug, is formed on corresponding sand core
One inverted circular cone hole；When casting is molded, the molten metal after melting enters sand core, since the circular cone hole on sand core causes
The surface of casting forms corresponding metal frustum, and the gas and impurity produced in casting is concentrated in metal frustum；Casting into
After type, unnecessary metal frustum is cut.
The gas and waste residue produced due to casting in forming process can be moved toward the upper surface of casting, be formed in upper surface
Defect.On the premise of the planform of core mold is not changed, do not increase new form fit, the venting plug of the present invention is utilized
Conical bore is formed on sand core, the casting upper surface after shaping, which can correspond to, has more metal frustum, and the metal frustum having more is higher than casting
Part surface, the waste residue and exhaust gas produced in casting forming process can be moved on metal frustum, in this way, just by cast(ing) surface
Defect is focused on metal frustum, and finally cuts the metal frustum containing waste residue and gas hole defect.
Using the venting plug and casting technique of the present invention, casting quality can be improved, reduces waste residue, the gas of casting upper surface
Hole defect.
Brief description of the drawings
Fig. 1 is shown as the structure diagram of the venting plug of the embodiment of the present invention 1.
Fig. 2 is shown as the venting plug of the embodiment of the present invention 1, and (there is folder in the axle center of circular frustum and the axle center of venting plug main body
Angle) structure diagram.
Fig. 3 is shown as the embodiment of the present invention, and 1 venting plug during sand core shaping, uses exhaust in 2 casting technique of embodiment
Fill in the structure diagram in core mold.
The structure for the aluminium alloy engine cylinder cap (with frustum) that Fig. 4 is shown as in the casting technique of the embodiment of the present invention 2 is shown
It is intended to.
Fig. 5 is shown as the structure of the aluminium alloy engine cylinder cap (removal frustum) in the casting technique of the embodiment of the present invention 2
Schematic diagram.
Piece mark explanation
100 --- venting plug,
101 --- venting plug main body,
102 --- it is open,
103 --- air discharge duct,
104 --- frustum,
200 --- mould,
201 --- exhausting-gas hole,
300 --- aluminium alloy engine cylinder cap,
301 --- metal frustum.
Embodiment
Illustrate embodiments of the present invention below by way of specific instantiation, those skilled in the art can be by this specification
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.
Embodiment 1
Referring to Fig. 1, Fig. 2, the venting plug of the present embodiment, is made of stainless steel material, and one end of venting plug main body 101 is
Opening 102, the other end open up multiple air discharge ducts 103, and air discharge duct 103 is connected with opening 102, opening 102 and the exhausting-gas hole of mould
Connection, is equipped with frustum 104 in the venting plug main body 101 for opening up 103 one end of air discharge duct, and axial direction and the sand core of frustum 104 are molded
The die sinking direction of mould is consistent.
Referring to Fig. 3, venting plug 100 is arranged in the exhausting-gas hole 201 of sand core molding die 200, for discharging sand core shaping
Caused gas.Air discharge duct 103 is connected with opening 102, and opening 102 is connected with the exhausting-gas hole 201 of mould 200, for the ease of
Gas is discharged, opening 102 and 201 coaxial design of exhausting-gas hole.In specifically used venting plug 100, for the ease of the demoulding, ensure circle
The axial direction of shape frustum 104 is consistent with the die sinking direction of sand core molding die 200.Thus, specifically manufacture venting plug 100 when
Wait, the axle center of circular frustum 104 and the axle center angle of venting plug main body 101, by the exhausting-gas hole 201 of sand core molding die 200
Direction and die sinking direction are determined (referring to Fig. 2).
Further, venting plug main body 101 is cylinder, and cylinder diameter is more than 10mm, generally in exhaust big 10mm
Fill in and the frustum of a cone 104 is set in main body 101, otherwise, the meeting blocking portion of frustum 104 air discharge duct 103, causes to be vented completely.Cone
Platform 104 is provided in round frustum, and cone angle is 3 °~5 °, this angular range is more advantageous to demoulding.The height of circular frustum 104
Degree is in 15mm~20mm.The basal diameter of circular frustum 104 is about the 50% of 101 diameter of venting plug main body, 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 section is trapezoidal, and the two sides angle in 103 section of air discharge duct is 6 °.Due to venting plug
103 structures of itself influence, and in process of production, sand grains easily blocks air discharge duct 103, it is necessary to often replace, and reduce production effect
Rate, increases maintenance cost.The design at 6 ° of oblique angles so that partly into the tiny sand grains of air discharge duct 103, be not detained in air discharge duct
In 103, also allow for clearing up.Angle is too small, and venting plug easily blocks, and angle is too big, and venting plug insufficient strength is good.
Specifically, 101 diameter 10mm of venting plug main body, high 10mm, 102 diameter 7.6mm of opening, 102 depth 8mm of opening, row
Air drain 103 is arranged in parallel 6, the wide 0.3mm in 103 top of air discharge duct, and 103 two sides angle of air discharge duct is 6 °.Circular frustum 104
Basal diameter 5mm, cone angle are 3 °, circular 104 high 15mm of frustum.The axle center of circular frustum 104 and venting plug main body 101
Axle center angle is 22.5 ° (referring to Fig. 2).
Embodiment 2
The casting technique of the present embodiment, mainly includes sand core shaping and casting is molded two steps, and employs embodiment 1
The venting plug of middle specific descriptions.
When sand core is molded, above-mentioned venting plug 100, sand core are set on the exhausting-gas hole 201 in the mould 200 of shaping sand core
In mould 200 during shaping, due to the circular frustum 104 of venting plug 100, an inverted circular cone is formed on corresponding sand core
Hole；When casting is molded, the molten metal after melting enters sand core, since the circular cone hole on sand core make it that the surface of casting is formed pair
The metal frustum 301 (reference can be made to Fig. 4) answered, the gas and impurity produced in casting are concentrated in metal frustum 301；Casting into
After type, unnecessary metal frustum 301 is cut.
The technique of specific cast aluminium alloy gold engine cylinder cover 300.
The first step, sand core shaping：
1. referring to Fig. 3, according to engine cylinder cover design structure size, the mould 200 of molding sand core is prepared to.
2. according to the position of vent bore 201 and sand core, determine to select venting plug in embodiment 1 or without frustum
Venting plug.
3. move towards and mold axle center and the row that direction determines the circular frustum 104 of venting plug 100 according to the exhausting-gas hole 201 of mould
22.5 ° of the axle center angle of vent plug main body 101.
4. corresponding to venting plug 100 in vent bore 201, sand is then noted.Equipment choosing
LAEMPE40SCHOOT MACHINE L40, shooting pressure 5BAR, shooting time 4 seconds, blows amine firm time 25 seconds.
5. die sinking, takes out sand core.
Second step, casting shaping：
1. above-mentioned sand core is used, Choose Die Casting Machine, the molten aluminum after injection melting.Using gravitational casting, casting time 15s,
Mould remaining time 170s.
It is cooled and shaped 2. taking out, removes 300 casting of aluminium alloy engine cylinder cap after sand core, referring to Fig. 4, aluminum alloy engine
The upper surface of 300 casting of machine cylinder cap forms the structure of circular metal frustum 301.
3. cutting away unnecessary metal frustum 301 using cutter device, 300 casting of aluminium alloy engine cylinder cap is obtained, is joined
See Fig. 5.
The venting plug of the present embodiment is mounted in the spring base supporting surface of aluminium alloy engine cylinder cap 300.Count spring seat supports
Waste product number caused by having shrinkage cavity around face, hole：
1000 products are counted, wherein, waste product becomes 2 waste products from 12 waste products before, and rejection rate is from from 1.2%
It is reduced to 0.2%.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (6)
1. venting plug, is arranged in the exhausting-gas hole of sand core molding die, one end of the venting plug main body is opening, and the other end is opened
If multiple air discharge ducts, the air discharge duct is connected with the opening, and the open exhausting-gas hole with the mould connects, its feature exists
In being equipped with frustum in the venting plug main body for open up air discharge duct one end, the axial direction of the frustum and the die sinking of sand core molding die
Direction is consistent；The frustum is the circular frustum that cone angle is 3 °~5 °；The height of the circle frustum is 15mm~20mm；
The venting plug main body is cylinder, and the cylinder diameter is more than 10mm；The basal diameter of the circle frustum is venting plug
50% or so of main diameter；The frustum is higher than cast(ing) surface；The axle center of circular frustum and the axle center angle of venting plug main body
For 22.5 °.
2. venting plug according to claim 1, it is characterised in that the air discharge duct is up-narrow and down-wide passage, and section is
It is trapezoidal.
3. venting plug according to claim 2, it is characterised in that the two sides angle of the exhaust slot cross-section is 6 °.
4. venting plug according to claim 3, it is characterised in that the upper opening of the air discharge duct is 0.3mm.
5. according to any venting plugs of claim 1-4, it is characterised in that described open same with the exhausting-gas hole of the mould
Axis.
6. a kind of casting technique, including sand core shaping and casting shaping, it is characterised in that when sand core is molded, in shaping sand core
Claims 1 to 5 any venting plug is set on the exhausting-gas hole in mould, and sand core is in in-mold molding, due to exhaust
The circular frustum of plug, corresponds to and an inverted circular cone hole is formed on sand core；When casting is molded, the molten metal after melting enters sand
Core, since the circular cone hole on sand core make it that the surface of casting forms corresponding metal frustum, the gas produced in casting and miscellaneous
Matter is concentrated in metal frustum；After casting shaping, unnecessary metal frustum is cut.
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 CN105921695A (en) | 2016-09-07 |
| CN105921695B true CN105921695B (en) | 2018-05-04 |
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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 |
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Families Citing this family (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 |
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| Publication number | Publication date |
|---|---|
| CN105921695A (en) | 2016-09-07 |
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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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