CN203459669U - Central air conditioner shell non-riser casting structure - Google Patents
Central air conditioner shell non-riser casting structure Download PDFInfo
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- CN203459669U CN203459669U CN201320460133.8U CN201320460133U CN203459669U CN 203459669 U CN203459669 U CN 203459669U CN 201320460133 U CN201320460133 U CN 201320460133U CN 203459669 U CN203459669 U CN 203459669U
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Abstract
The utility model discloses a central air conditioner shell non-riser casting structure which comprises a central air conditioner shell casting mould cavity. An upper sand mould and a lower sand mould are assembled to form the central air conditioner shell casting mould cavity. The upper sand mould comprises a low pressure area, the lower sand mould comprises a high pressure area, first chilling blocks are uniformly arranged in the upper sand mould of a low pressure area casting mould cavity, second chilling blocks are uniformly arranged in the lower sand mould of a high pressure area casting mould cavity, and a central casting system is arranged in the upper sand mould and the lower sand mould and comprises a sprue, a cross gate and ingates. By the aid of the central casting system, the high pressure area of a casting is placed on the lower sand mould, feeding is strengthened by the aid of the gravity of iron liquid, the chilling blocks are respectively arranged on the thick wall of a thermal center of the casting, the casting is fed by 'simultaneous solidification' formed by the chilling principle of the chilling blocks, graphitizing expansion in the cooling process of the iron liquid can be offset by a high-strength resin sand mould, and the self-feeding capacity of the casting is enhanced, so that the casting with compact texture can be obtained without a riser.
Description
Technical field
The invention belongs to machine design and manufacture field, especially belong to machine casting technical field, particularly a kind of central air-conditioning casing head-free casting structure.
Background technology
In resin sand casting production process, the design of casting technique structure directly has influence on casting quality and production cost, and for the larger casting structure of wall thickness variation, common casting technique is to adopt riser feeding to obtain the foundry goods of dense structure.The central air-conditioning casing foundry goods that my company produces, model is many, not of uniform size, and its material is HT350, is pressure testing product, to the matrix of foundry goods, requires all very high.Operating pressure during product work is 1.18MPa, and test pressure is 3.6MPa, and machined surface does not allow to exist any casting flaw.For the iron liquid of above requirement and HT350, shrink large and casting section thickness difference is also large, existing casting technique is to adopt open riser feeding to obtain the foundry goods of dense structure, there is following problem in technique: owing to having adopted riser feeding, product yield is lower, and production cost is higher; During casting cleaning rising head, easily cause damage; In casting process, to carry out a benefit rising head, easily occur potential safety hazard; Affected by material or operation factors, casting pressing port place is prone to shrinkage cavity and porosity, has hidden danger of quality.
Summary of the invention
The utility model discloses a kind of central air-conditioning casing head-free casting structure according to the deficiencies in the prior art.Problem to be solved in the utility model is to cancel rising head, raising product yield, assurance casting quality, and it obtains the foundry goods of dense structure by reasonable Arrangement chill.
The present invention is achieved through the following technical solutions:
Central air-conditioning casing head-free casting structure, comprise the central air-conditioning casing casting model chamber that sand mold and lower sand mold mould assembly form, it is characterized in that: described upper sand mold comprises the low-pressure area of central air-conditioning casing cast model cavity, lower sand mold comprises the higher-pressure region of central air-conditioning casing cast model cavity; Described low-pressure area cast model cavity in sand mold, be evenly provided with the first chill above, described higher-pressure region cast model cavity in sand mold, be evenly provided with the second chill below.
Described upper sand mold is evenly provided with the venthole that is communicated with air.
In described upper sand mold and lower sand mold, be provided with parting gating, parting gating comprises sprue, cross gate and ingate.
Described sprue end face exceeds low-pressure area cast model cavity upper surface 180mm, and the L-shaped sand mold that is arranged in of cross gate, has 6 ingates to divide both direction to be arranged in lower sand mold.
Above-mentioned the first chill is arranged on the low-pressure area cast the thickest position of model cavity upper surface foundry goods, and the second chill is arranged on the cast the thickest position of model cavity lower surface foundry goods, higher-pressure region.
The utility model helpfulness: the utility model adopts parting gating, and important foundry goods higher-pressure region is placed on to lower sand mold, strengthens feeding by means of iron liquid gravity; And at foundry goods thermal center heavy wall position, below above casing low-pressure area and casing higher-pressure region, arrange respectively chill, in iron liquid casting cooling procedure, utilize the Quench principle of chill to form the feeding that " solidifying " reaches foundry goods simultaneously; And high-intensity resin bonded sand mould can be offset the graphitization expansion in iron liquid cooling procedure, strengthen foundry goods from feeding capacity; Thereby do not need rising head still can obtain the foundry goods of dense structure.
Accompanying drawing explanation
Fig. 1 is the utility model cast structural configuration generalized section;
Fig. 2 is the utility model cast structural configuration schematic top plan view;
Fig. 3 is the utility model cast structural configuration elevational schematic view;
Fig. 4 is existing open riser cast structural configuration generalized section;
Fig. 5 is existing open riser cast structural configuration schematic top plan view.
In figure, the 01st, sprue, the 02nd, cross gate, the 03rd, ingate, the 04th, casing foundry goods, 05 is the first chill, 06 is the second chill, the 07th, low-pressure area, the 08th, higher-pressure region, the 09th, venthole, the 10th, rising head, A is sand mold mo(u)ld top half, B is sand mold mo(u)ld bottom half.
The specific embodiment
Below by embodiment, the utility model is conducted further description; embodiment is only for being further detailed the utility model; but can not be interpreted as the restriction to the utility model protection domain, those skilled in the art makes some nonessential improvement and adjusts the scope that also belongs to the utility model protection according to the utility model content.
In conjunction with Fig. 1 to Fig. 3.The cast structural plan of Fig. 1 to Fig. 5, figure comprises the structures such as sprue, cross gate, ingate, rising head, chill and foundry goods.
As shown in the figure, central air-conditioning casing head-free casting structure, comprise the central air-conditioning casing cast model cavity that sand mold and lower sand mold mould assembly form, the die cavity of upper sand mold has comprised the low-pressure area 07 of central air-conditioning casing foundry goods, and the die cavity of lower sand mold has comprised the higher-pressure region 08 of central air-conditioning casing foundry goods; Low-pressure area 07 cast model cavity in sand mold, be evenly provided with the first chill 05 above, higher-pressure region 08 cast model cavity in sand mold, be evenly provided with the second chill 06 below.The stress area that operating pressure when so-called low-pressure area 07 refers to the work of central air conditioning shell product is low pressure, requires slightly high to the matrix of foundry goods; The stress area that operating pressure when so-called higher-pressure region 08 refers to the work of central air conditioning shell product is high pressure, requires very high to the matrix of foundry goods.
Upper sand mold is evenly provided with the venthole 09 that is communicated with air.
In upper sand mold and lower sand mold, be provided with parting gating, parting gating comprises sprue 01, cross gate 02 and ingate 03.Sprue 01 end face exceeds low-pressure area cast model cavity upper surface 180mm, and the L-shaped sand mold that is arranged in of cross gate 02, has 03 minute both direction of 6 ingates to be arranged in lower sand mold.The first chill 05 is arranged on the low-pressure area cast the thickest position of model cavity upper surface foundry goods, and the second chill 06 is arranged on the cast the thickest position of model cavity lower surface foundry goods, higher-pressure region.
Fig. 1 is the utility model cast structural configuration generalized section.As shown in the figure, represented the cross section structure of central air-conditioning casing foundry goods in figure, Fig. 1 is along the CC cross section structure signal shown in Fig. 2.This example is from central air conditioner casing foundry goods low-pressure area 07 and higher-pressure region 08 joint portion somatotype, be about to sand mold and be designed to sand mold mo(u)ld top half A and sand mold mo(u)ld bottom half district B, the cast model cavity of upper sand mold comprises the low-pressure area 07 of central air-conditioning casing foundry goods, and the cast model cavity of lower sand mold comprises the higher-pressure region 08 of central air-conditioning casing foundry goods.In conjunction with Fig. 2 and Fig. 3, in the sand mold of this routine low-pressure area 07 cast model cavity upper surface, be evenly provided with 12 the first chills 05, in the sand mold of higher-pressure region 08 cast model cavity lower surface, be evenly provided with 20 the second chills 06.The first chill 05 and the second chill 06 are all selected graphite chilling block, and graphite chilling block can not cause spoken parts in traditional operas and the pore of foundry goods.Fig. 2 has also described the evenly venthole 09 of the connection air of setting of upper sand mold, and venthole 09 is provided with the casting mold exhaust being beneficial in casting process.
As shown in Figure 1, Figure 2, Figure 3 shows, sprue 01 end face exceeds central air-conditioning casing upper surface 180mm, and running channel cross section is circular; The L-shaped sand mold that is arranged in of cross gate 02, running channel cross section is trapezoidal; 03 minute both direction of 6 ingates is arranged in lower sand mold, and running channel cross section is flat wedging.
The utility model has been cancelled rising head, and product yield reaches 93%, has saved cost, meanwhile, and the series of problems having brought while also having avoided cleaning rising head.This cast structure utilizes the Quench principle of chill to form the feeding that " solidifying " reaches foundry goods simultaneously; And high-intensity resin bonded sand mould can be offset the graphitization expansion in iron liquid cooling procedure, strengthen foundry goods from feeding capacity; Thereby do not need rising head still can obtain the foundry goods of dense structure.
The utility model is not found, because the waste product that shrinkage cavity and porosity defect causes appears in foundry goods, to have significantly improved yield rate through examination type experiment production, has improved production efficiency.
Comparative example
Fig. 4 and Fig. 5 are existing open riser cast structural configuration schematic diagrames, and Fig. 4 is the structural representation along the direction of D-D shown in Fig. 5 cross section.As shown in the figure, running gate system adopts parting gating, and from somatotype between casing low-pressure area 07 and casing higher-pressure region 08, casing low-pressure area 07 is at mo(u)ld top half, and casing higher-pressure region 08 is at mo(u)ld bottom half.Anchor ring on R4 central air-conditioning casing low-pressure area 07 is evenly arranged 4 rising heads 10, is highly 350mm, each rising head substance 56kg, and dead head adds up to heavy 285kg, and product yield only has 77.8%.
Claims (5)
1. a central air-conditioning casing head-free casting structure, comprise the central air-conditioning casing cast model cavity that sand mold and lower sand mold mould assembly form, it is characterized in that: described upper sand mold comprises the low-pressure area of central air-conditioning casing cast model cavity, lower sand mold comprises the higher-pressure region of central air-conditioning casing cast model cavity; Described low-pressure area cast model cavity in sand mold, be evenly provided with the first chill above, described higher-pressure region cast model cavity in sand mold, be evenly provided with the second chill below.
2. central air-conditioning casing head-free casting structure according to claim 1, is characterized in that: described upper sand mold is evenly provided with the venthole that is communicated with air.
3. central air-conditioning casing head-free casting structure according to claim 2, is characterized in that: in described upper sand mold and lower sand mold, be provided with parting gating, parting gating comprises sprue, cross gate and ingate.
4. central air-conditioning casing head-free casting structure according to claim 3, it is characterized in that: described sprue end face exceeds low-pressure area cast model cavity upper surface 180mm, the L-shaped sand mold that is arranged in of cross gate, has 6 ingates to divide both direction to be arranged in lower sand mold.
5. according to the central air-conditioning casing head-free casting structure described in claim 1 to 4 any one, it is characterized in that: described the first chill is arranged on the low-pressure area cast the thickest position of model cavity upper surface foundry goods, the second chill is arranged on the cast the thickest position of model cavity lower surface foundry goods, higher-pressure region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320460133.8U CN203459669U (en) | 2013-07-31 | 2013-07-31 | Central air conditioner shell non-riser casting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320460133.8U CN203459669U (en) | 2013-07-31 | 2013-07-31 | Central air conditioner shell non-riser casting structure |
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| CN203459669U true CN203459669U (en) | 2014-03-05 |
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| CN201320460133.8U Expired - Fee Related CN203459669U (en) | 2013-07-31 | 2013-07-31 | Central air conditioner shell non-riser casting structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109332604A (en) * | 2018-11-02 | 2019-02-15 | 四川共享铸造有限公司 | The method for solving cylindric nodular iron casting shrinkage porosite |
| CN113477886A (en) * | 2021-07-12 | 2021-10-08 | 杭州新宇机械制造有限公司 | Casting system and casting process for steam turbine cylinder body casting |
| CN116274861A (en) * | 2022-09-07 | 2023-06-23 | 芜湖久弘重工股份有限公司 | Riser-free casting process of large-tonnage mold clamping force thick large-section injection molding machine template casting |
| CN117282922A (en) * | 2023-09-23 | 2023-12-26 | 河北北方铸业有限公司 | Non-contact thermal repairing technology for castings |
-
2013
- 2013-07-31 CN CN201320460133.8U patent/CN203459669U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109332604A (en) * | 2018-11-02 | 2019-02-15 | 四川共享铸造有限公司 | The method for solving cylindric nodular iron casting shrinkage porosite |
| CN113477886A (en) * | 2021-07-12 | 2021-10-08 | 杭州新宇机械制造有限公司 | Casting system and casting process for steam turbine cylinder body casting |
| CN116274861A (en) * | 2022-09-07 | 2023-06-23 | 芜湖久弘重工股份有限公司 | Riser-free casting process of large-tonnage mold clamping force thick large-section injection molding machine template casting |
| CN117282922A (en) * | 2023-09-23 | 2023-12-26 | 河北北方铸业有限公司 | Non-contact thermal repairing technology for castings |
| CN117282922B (en) * | 2023-09-23 | 2024-04-26 | 河北北方铸业有限公司 | Non-contact thermal repairing technology for castings |
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Granted publication date: 20140305 Termination date: 20190731 |
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| CF01 | Termination of patent right due to non-payment of annual fee |