CN203091684U

CN203091684U - Pouring exhaust structure for water jacket of cylinder body

Info

Publication number: CN203091684U
Application number: CN 201320064566
Authority: CN
Inventors: 郭静华; 戚春杰; 唐强; 李忠革; 陈宇
Original assignee: LIAONING LONGHUA AUTOMOBILE PARTS MANUFACTURING Co Ltd
Current assignee: LIAONING LONGHUA AUTOMOBILE PARTS MANUFACTURING Co Ltd
Priority date: 2013-02-05
Filing date: 2013-02-05
Publication date: 2013-07-31
Anticipated expiration: 2023-02-05

Abstract

The utility model provides a pouring exhaust structure for a water jacket of a cylinder body, and aims to solve the problem that the internal defect of a casting is caused by certain gas evolution amount when a sand core is produced by precoated sand and is assembled in a core cavity. The pouring exhaust structure is technically characterized in that water jacket cores are sleeved on side walls of four cylinder barrel cores; an exhaust passage is arranged in each water jacket core; two branches perpendicular to each other are arranged in the exhaust passages; and gas outlets of the branches are formed in a cylinder body riser core. The pouring exhaust structure has the beneficial effects that the gas produced by the sand core of the precoated sand is effectively exhausted, the outside of the sand core is packaged by a coating layer, the coating layer is capable of preventing the gas from exhausting towards a casting body, thus gas holes inside the casting can be reduced, and the rejection rate is reduced.

Description

Cylinder body water jacket cast exhaust structure

Technical field

The utility model relates to engine part and makes the field, particularly a kind of cylinder body water jacket cast exhaust structure that is used to improve exhaust quality when cylinder body water jacket of engine is poured into a mould.

Background technology

Along with making rapid progress of automobile product, automobile production enterprise constantly accelerates the car load Products Development in constantly competing.Although face shaping from car body, material and auxiliary equipment all will exert an influence to the performance of motor vehicle, but the heart of automobile---engine, for performance is the most vital, no matter from the supply of material should amount, aspects such as price and Performance Match, all can directly influence the performance indications of vehicle newly developed.

Usually in the process of producing, the Mold Making cycle is long, cost is high.The most important thing is that molding sand in use problems can occur, as: after use, need to screen again; When making sand mold, easily come off, thereby cause situations such as occurring unbalanced stress, sand holes, shrinkage porosite in the bearing block.

Precoated sand is a kind of new molding sand, and sand grain surface promptly is covered with the molding sand or the core sand of one deck hard resin film before moulding.Two kinds of coating techniques of cold process and Re Fa are arranged: cold process with resin dissolves, and adds methenamine with ethanol in the mulling process, make the two be coated on sand grain surface, the ethanol volatilization, precoated sand; Hot method is preheating to uniform temperature to sand, adds resin and makes its fusion, stirs to make resin-coating at sand grain surface, adds the methenamine aqueous solution and lubricant, cooling, broken, sieve precoated sand.Be used for steel-casting, ironcasting.Though precoated sand has the following advantages, as: shake-out, high strength, lowly get angry, low bulk; Laxing property is good, cast(ing) surface is highly polished; Shell mould is aliquation, Heat stability is good, good, the good fluidity of thermal conductivity not, and cast(ing) surface is smooth; High strength, high temperature resistant, low bulk, good, the anti-stick grittiness of release property are good; Shell does not evenly shell, curing rate is fast.But precoated sand is produced core when being assembled in the core chamber, have certain gas forming amount, can cause the defective of foundry goods inside.

The oil circuit of cylinder usually and cylinder be structure as a whole, when the cast engine cylinder block, moulding by casting together, but it is complicated and changeable that oil circuit is provided with, so need a kind of cylinder body water jacket cast exhaust structure that improves the cylinder body water jacket of engine casting quality when using precoated sand cast engine cylinder block.

Summary of the invention

The purpose of this utility model provides a kind of cylinder body water jacket cast exhaust structure that is used to improve exhaust quality when cylinder body water jacket of engine is poured into a mould.

The technical solution of the utility model is: main body core mold, limit core mold, the cylinder barrel core, the limit core, cylinder body camshaft core, cylinder body rising head core, jacket core, housing-case, the cast guider is characterized in that being fixed with at the middle part of housing-case main body core mold, edge at housing-case is fixed with limit core mold, be fixed with at least four cylinder barrel cores on the main body core mold, at the fixing cylinder body rising head core that matches with the cylinder barrel core of an end of cylinder barrel core, in a side of cylinder barrel core, cylinder body rising head core below stationary housing camshaft core, jacket core is enclosed within on the sidewall of four cylinder barrel cores, be shaped on exhaust duct in jacket core, exhaust duct is provided with two orthogonal branch roads, and the exhaust outlet of branch road is set at cylinder body rising head core place; The edge of housing-case is fixed with limit core mold, and fixed edge core in the core mold of limit is installed the cast guider at following core and limit, side in-core; The sprue gate and the limit core of cast guider are in same horizontal level, and the cup of cast guider passes housing-case and is fixed on the housing-case outside.Housing-case and limit core make and are bolted together.The cylinder barrel core, the limit core, cylinder body camshaft core, cylinder body rising head core, jacket core is precoated sand and makes.At least four cylinder barrel cores are in line and are fixed on the main body core mold.

The beneficial effects of the utility model be use " macropore goes out stream " theoretical with " equilibrium is solidified " theory, reduce the kinetic energy of molten iron, and then reduce the washing away of core of molten iron; Reduce the factor that influences the duration of pouring, reasonably design dead head; Reduce the shrinkage porosite of foundry goods inside; When guaranteeing block structure intensity, reach technological requirement.At core indoor design air flue, the gas that can effectively discharge core and produced, there is the dope layer parcel core outside, can stop gas to the discharging of foundry goods body, thereby reduces the internal porosity of foundry goods, the rate of reducing the number of rejects and seconds.

Description of drawings

Fig. 1 is a structural representation sketch of the present utility model;

Fig. 2 is the cast air flue section simplified schematic diagram of Fig. 1;

Fig. 3 is that the three-dimensional air flue of Fig. 2 moves towards simplified schematic diagram.

Utility model is described in further detail by example below in conjunction with accompanying drawing; but following example only is the utility model example wherein; the rights protection scope of not representing the utility model and being limited, rights protection scope of the present utility model is as the criterion with claim.

The specific embodiment

Referring to Fig. 1, be fixed with main body core mold at the middle part of housing-case 1, edge at housing-case is fixed with limit core mold, fixing at least four cylinder barrel cores 10 on the main body core mold, at the fixing cylinder body rising head core 2 that matches with the cylinder barrel core of an end of cylinder barrel core, stationary housing camshaft core 9 below a side of cylinder barrel core, cylinder body rising head core, jacket core 5 is enclosed within on the sidewall of four cylinder barrel cores.Referring to Fig. 2, in jacket core, be shaped on exhaust duct 52, exhaust duct is provided with two orthogonal branch roads, and the exhaust outlet of branch road is set at cylinder body rising head core 51 places.

The edge of housing-case is fixed with limit core mold, and fixed edge core in the core mold of limit is installed cast guider 7 in following core 8 and limit, side core 4; The sprue gate 6 of cast guider is in same horizontal level with following core upper surface, and the cup 3 of cast guider passes housing-case and is fixed on the housing-case outside.

Earlier four cylinder barrel cores are in line and are fixed together, again with cylinder body rising head core and the combination of cylinder body water jacket core, pick up rising head core and jacket core simultaneously, be enclosed within on the cylinder barrel core, respectively cylinder body front end core and rear end of the cylinder block core are being worked good, penetrate the core assembly bolt, pad is placed on the bolt, use the I-shaped spanner again bolted.Again that cylinder body the right core and cylinder body left side core group is good after fastening, on the core of the cylinder body left side, put the cylinder body gate core well.The assembling of cylinder body core finishes.At last housing-case is enclosed within on the sand mold, makes the sand mold can not be loose.

Operation principle: with the overhead traveling crane ladle of slinging, shake the ladle handwheel, agio is injected the core chamber, molten iron at first enters the cylinder body sprue of cylinder body left side in-core portion by the cylinder body gate core, molten iron flows to the cylinder body ingate from the cylinder body cross gate of cylinder body left side in-core portion, enter the die cavity that core is formed from ingate, finally obtain the finished product cylinder blank.

Claims

1. a cylinder body water jacket is poured into a mould exhaust structure, it comprises: main body core mold, limit core mold, the cylinder barrel core, the limit core, cylinder body camshaft core, cylinder body rising head core, jacket core, housing-case, the cast guider, it is characterized in that: be fixed with main body core mold at the middle part of housing-case, be fixed with limit core mold, be fixed with at least four cylinder barrel cores on the main body core mold in the edge of housing-case, at the fixing cylinder body rising head core that matches with the cylinder barrel core of an end of cylinder barrel core, side at the cylinder barrel core, cylinder body rising head core below stationary housing camshaft core, jacket core is enclosed within on the sidewall of four cylinder barrel cores, is shaped on exhaust duct in jacket core, exhaust duct is provided with two orthogonal branch roads, and the exhaust outlet of branch road is set at cylinder body rising head core place; The edge of housing-case is fixed with limit core mold, and fixed edge core in the core mold of limit is installed the cast guider at following core and limit, side in-core; The sprue gate and the limit core of cast guider are in same horizontal level, and the cup of cast guider passes housing-case and is fixed on the housing-case outside.

2. according to the described cylinder body water jacket cast of claim 1 exhaust structure, it is characterized in that: described housing-case and limit core make and are bolted together.

3. according to the described cylinder body water jacket cast of claim 1 exhaust structure, it is characterized in that: the cylinder barrel cored structure, the limit cored structure, cylinder body camshaft cored structure, cylinder body rising head cored structure, the equal structure of jacket core is that precoated sand is made.

4. according to the described cylinder body water jacket cast of claim 1 exhaust structure, it is characterized in that: at least four cylinder barrel cores are in line and are fixed on the main body core mold.