CN105798238B - A kind of bottom gating of cylinder head - Google Patents
A kind of bottom gating of cylinder head Download PDFInfo
- Publication number
- CN105798238B CN105798238B CN201610394526.1A CN201610394526A CN105798238B CN 105798238 B CN105798238 B CN 105798238B CN 201610394526 A CN201610394526 A CN 201610394526A CN 105798238 B CN105798238 B CN 105798238B
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- CN
- China
- Prior art keywords
- sprue
- ingate
- cylinder head
- cross gate
- molten metal
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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
- B22C9/082—Sprues, pouring cups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
Abstract
The present invention discloses a kind of bottom gating of cylinder head, including the sprue, cross gate and ingate being sequentially communicated, it is characterized in that, the sprue is vertically arranged, the cross gate being laterally arranged is connected in the bottom of sprue, the top surface of cross gate be provided with several ingates, the ingate straight up, and ingate opening be arranged at the top of it.The bottom gating of cylinder head of the present invention is injected from the foundation of cylinder cover cavity, type is filled from the bottom up, the flow velocity of molten metal can be effectively reduced, reduce impact of the molten metal to type, core, be conducive to exhaust, it is steady to fill type, full of fast, metal oxidation is light, and slag blocking capacity is strong, the defects of to effectively avoid casting from generating burning into sand, slag inclusion, improves casting quality.
Description
Technical field
The present invention relates to running gate system technical field more particularly to a kind of bottom gatings of cylinder head.
Background technique
The effect of cylinder head is sealing cylinder, combustion space is collectively formed with piston, and bear the work of high-temperature high-pressure fuel gas
Bear mechanical load caused by gas force and fastening bolt cylinder with, cylinder head, while due also to contacted with high-temperature fuel gas and
Very high thermic load is born, the inner cavity configuration of cylinder head is extremely complex, high to the design requirement of running gate system.To avoid
It is the defects of causing casting to generate burning into sand, slag inclusion because of the type chamber of molten metal impact sand core composition in cylinder head casting process, traditional
Design of Runner System usually has following methods: a kind of to push up the running gate system to drench with rain, ingate is using refractory material (as made pottery
Porcelain tube) it is made and is washed away with this to reduce molten iron to sand mold, the situation that casting generates burning into sand, slag inclusion can be reduced；There are also a kind of sides
Formula is successively to be sequentially injected into molten iron using hierarchical layered running gate system.But first way is poured using interior made of ceramic tube
Road greatly increases the production cost of cylinder head, and multi-layer classification injection system structure is complicated, and design difficulty is big, and technique is produced
Rate is low.
Summary of the invention
The technical problems to be solved by the invention and the technical assignment of proposition are improved to the prior art, and one kind is provided
The bottom gating of cylinder head solves injection system structure complexity traditional in current technology, and design difficulty is big, and technique goes out
The problem of product rate is low, high production cost.
In order to solve the above technical problems, the technical scheme is that
A kind of bottom gating of cylinder head, including the sprue, cross gate and ingate being sequentially communicated, feature
It is, the sprue is vertically arranged, and the cross gate being laterally arranged is connected in the bottom of sprue, and the top surface of cross gate is set
Several ingates is set, straight up, and the opening of ingate is arranged at the top of it the ingate.It is of the present invention
Cylinder head bottom gating using straight up and be open be arranged in top ingate formed bottom pouring type pouring
System, can be effectively reduced the flow velocity of molten metal, reduces impact of the molten metal to sand core, is conducive to exhaust, and it is steady to fill type, be full of
Fastly, metal oxidation is light, and slag blocking capacity is strong, so that the defects of effectively avoiding casting from generating burning into sand, slag inclusion, improves casting quality, and
And the structure of the bottom gating of cylinder head of the present invention is simple, design difficulty is small, and product yield is high, Ke Yi great
The big production cost for reducing cylinder head, high financial profit.
Further, the sectional area of the sprue, cross gate and ingate be respectively that ∑ F is straight, ∑ F is horizontal and ∑ F in,
Using unchoked running system, ∑ F is straight≤∑ F cross≤∑ F in.The choked flow section of running gate system is in sprue lower end, molten metal
Full of sprue, the flow velocity of molten metal can be effectively reduced, type is steady so that filling, and reduces impact of the molten metal to type, core, metal
Oxidation is light, improves castability.
Further, the ∑ F is straight, ∑ F is horizontal and ∑ F in ratio be 1:1.5~2:2~2.5, it is ensured that stablize slow
Metal flow velocity so that it is steady to fill type, and ensures good slag blocking capacity, the defects of avoiding casting from generating burning into sand, slag inclusion.
Further, the ∑ F is straight, ∑ F is horizontal and ∑ F in ratio be 1:1.78:2.27, when section area ratio is larger
When, molten metal is in pressure-free flow state, molten metal running gate system not easy to fill, therefore the section area ratio that setting is determining, is being dropped
Ensure molten metal full of running gate system while low metal flow velocity.
Further, the sectional area of the ingate in several described ingates from sprue distalmost end is maximum, avoids
Iron liquid flow velocity is too fast to be caused to splash, while running gate system effectively full of the product type chamber from sprue distalmost end, is improved
Casting quality.
Further, the sprue is provided with all the way, and cross gate is provided with all the way, and ingate is provided with five tunnels.
Further, the sectional area ∑ F of the sprue is directly 19.625cm2, the sectional area ∑ F of cross gate is horizontal to be
35cm2。
Further, the sectional area in the five road ingates close to tetra- road ingate of sprue Qian is identical, from straight
The ingate sectional area of running channel distalmost end is greater than the sectional area on preceding four tunnel.
Further, the sectional area of the tetra- road ingate of close sprue Qian is 8.16cm2, farthest from sprue
The ingate sectional area at end is 12cm2。
Further, the junction of the sprue and cross gate is provided with filter screen, slows down the flow velocity of molten metal, has
The defects of imitating impurity screening, casting is avoided to generate burning into sand, slag inclusion improves casting quality.
Compared with prior art, the invention has the advantages that:
The bottom gating of cylinder head of the present invention is injected from the foundation of cylinder cover cavity, is filled from the bottom up
Type, can be effectively reduced the flow velocity of molten metal, reduces impact of the molten metal to type, core, is conducive to exhaust, and it is steady to fill type, full of fast,
Metal oxidation is light, and slag blocking capacity is strong, so that the defects of effectively avoiding casting from generating burning into sand, slag inclusion, improves casting quality；The present invention
The bottom gating structure of the cylinder head is simple, and design difficulty is small, and product yield is high, can substantially reduce cylinder
The production cost of lid.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
A kind of bottom gating of cylinder head disclosed by the embodiments of the present invention overcomes traditional running gate system to casting
The casting quality of the problem of quality influences, production is stablized, and gives up caused by considerably reducing because of the defects of cold shut, burning into sand, slag inclusion
Product, structure is simple, and design difficulty is small, reduces production cost.
As shown in Figure 1, a kind of bottom gating of cylinder head, including sprue 1, cross gate 2 and ingate 3, three
What person was sequentially communicated, sprue 1 is provided with all the way and is vertically arranged, and is connected to laterally be arranged one in the bottom of sprue 1
Road cross gate 2, the junction of sprue 1 and cross gate 2 are provided with filter screen 4, and the top surface of cross gate 2 is provided in several and pours
Road 3, in the present embodiment, ingate 3 are provided with five tunnels, and straight up, and the opening of ingate 3 is set the ingate 3
It sets at the top of it, the present invention uses unchoked running system, and the sectional area of sprue 1, cross gate 2 and ingate 3 is respectively ∑ F
Directly, ∑ F is horizontal and ∑ F in, the size relation of three be ∑ F it is straight≤∑ F cross≤∑ F in, choked flow section is on sprue, molten metal
Flow velocity is low, fills generation the defects of type is steady, and metal oxidation is gently, small to type chamber scouring force, reduction burning into sand, slag inclusion.
T is Efficient Pouring Time, and f is material coefficient (gray cast iron f=1.0, spheroidal graphite cast-iron f=0.9), and G is casting weight,
σ is the main wall thickness (refer generally to most thin-walled thickness) of casting, and n is the group number or casting ladle number (n≤3) of running gate system, takes the t to be herein
18s。
S resistance is the minimum cross section gross area in running gate system, and M is the molten metal weight for flowing through choked flow section, and ρ is molten metal
Density, t are Efficient Pouring Time, and μ is that (0.1) teeming 0.8, middle note 0.6, rising pouring 0.45 have filtering drop to discharge coefficient, g attaches most importance to
Power acceleration, Hp are average static head height, and taking S resistance herein is 19.625cm2, with sprue 1 for choked flow section, sprue 1
Select the pipeline of φ 50mm.
Stablize and slowly metal flow velocity, impact of the reduction molten metal to type, core to realize, and avoids the occurrence of gold
Belong to flow velocity excessively leads to the situation of running gate system not easy to fill in pressure-free flow state slowly, the ratio in ∑ F is straight, ∑ F cross and ∑ F
Example is set as 1:1.5~2:2~2.5, and the sectional area of the ingate from 1 distalmost end of sprue is maximum, avoids iron liquid flow velocity
Too fast to cause to splash, specific casting parameter is as shown in table 1.
1 gating system parameter table of table
Using the cylinder head yield rate produced after the open anti-Shower gating system of rising pouring up to 95% or more, greatly drop
The problem of low cylinder head is suppressed leakage caused by burning into sand, slag inclusion and cold shut due to is scrapped, while the injection system structure is simple,
The cylinder cap of gas is produced without using ceramic tube ingate, reduces the production cost of production cylinder head.
The above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
Limitation of the invention, protection scope of the present invention should be defined by the scope defined by the claims..For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, several improvements and modifications can also be made, these change
It also should be regarded as protection scope of the present invention into retouching.
Claims (2)
1. a kind of bottom gating of cylinder head, including the sprue (1), cross gate (2) and ingate being sequentially communicated
(3), which is characterized in that the sprue (1) is vertically arranged, and horizontal is poured what the bottom of sprue (1) was connected to laterally to be arranged
Road (2), the top surface of cross gate (2) are provided with several ingates (3), the ingate (3) straight up, and ingate
(3) opening is arranged at the top of it, and the sectional area of the sprue (1), cross gate (2) and ingate (3) is respectively ∑ F
Directly, ∑ F is horizontal and ∑ F in, using unchoked running system, the ∑ F is straight, ∑ F is horizontal and ∑ F in ratio be 1:1.78:
2.27, the sprue (1) is provided with all the way, and cross gate (2) is provided with all the way, and ingate (3) is provided with five tunnels, described
Sectional area in five road ingates (3) close to tetra- road ingate (3) of sprue (1) Qian is identical, from sprue (1) distalmost end
Ingate sectional area is greater than the sectional area on preceding four tunnel.
2. the bottom gating of cylinder head according to claim 1, which is characterized in that the sprue (1) with
The junction of cross gate (2) is provided with filter screen (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610394526.1A CN105798238B (en) | 2016-06-02 | 2016-06-02 | A kind of bottom gating of cylinder head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610394526.1A CN105798238B (en) | 2016-06-02 | 2016-06-02 | A kind of bottom gating of cylinder head |
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| Publication Number | Publication Date |
|---|---|
| CN105798238A CN105798238A (en) | 2016-07-27 |
| CN105798238B true CN105798238B (en) | 2019-06-07 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106077494B (en) * | 2016-08-25 | 2018-11-16 | 四川南车共享铸造有限公司 | A kind of pouring procedure casting VHP main beating cap |
| CN108941469B (en) * | 2018-08-16 | 2020-01-10 | 西峡县西泵特种铸造有限公司 | Process for slag blocking and feeding of pouring channel of heat-resistant steel volute |
| CN109290548B (en) * | 2018-10-30 | 2021-07-30 | 宁波埃利特模具制造有限公司 | Pouring exhaust system of automobile component die-casting mold and setting method |
| CN112247068A (en) * | 2020-08-25 | 2021-01-22 | 常熟市虹桥铸钢有限公司 | Casting method of upper casting of gearless electric propeller hull |
| CN112139454A (en) * | 2020-09-30 | 2020-12-29 | 大连金河铸造有限公司 | Improved slag stopping structure and method for pouring system |
| CN113909435A (en) * | 2021-04-19 | 2022-01-11 | 宁波茸发新材料科技有限公司 | Casting method of ductile iron small-sized hydraulic part |
| CN113477888A (en) * | 2021-06-24 | 2021-10-08 | 襄阳五二五泵业有限公司 | Gating system for sand casting |
| CN116689710B (en) * | 2023-08-02 | 2023-10-13 | 山西华德冶铸有限公司 | Casting method of excavator rotating support |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| AU601315B2 (en) * | 1988-01-30 | 1990-09-06 | Foseco International Limited | Moulds for metal casting and sleeves containing filters for use therein |
| CN101722277A (en) * | 2009-12-11 | 2010-06-09 | 沪东重机有限公司 | Method for casting cylinder cover of low-speed diesel for large-bore vessel |
| CN101961768A (en) * | 2010-11-18 | 2011-02-02 | 沪东重机有限公司 | Method for casting cast steel cylinder cover |
| CN103212672B (en) * | 2013-03-15 | 2015-07-22 | 马钢(集团)控股有限公司 | Method for casting low speed diesel engine cylinder cap for large cylinder diameter boat |
| CN104815964B (en) * | 2015-04-30 | 2016-12-07 | 共享装备有限公司 | Solve the running gate system that ingate influent stream is uneven |
| CN105328127A (en) * | 2015-11-27 | 2016-02-17 | 四川南车共享铸造有限公司 | Open type top shower gating system for air cylinder cover |
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Address after: 641301 2 building, China World Trade Center tower, 6 CHENFENG Road, Yanjiang District, Ziyang, Sichuan. Applicant after: Sichuan sharing Casting Co., Ltd. Address before: 641300 2 building, China World Trade Center tower, 6 CHENFENG Road, Yanjiang District, Ziyang, Sichuan. Applicant before: SICHUAN NANCHE GONGXIANG CASTING CO., LTD. |
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