CN201136041Y

CN201136041Y - Casting core for cylinder block

Info

Publication number: CN201136041Y
Application number: CNU2007201875896U
Authority: CN
Inventors: 林振丽; 陈祖礼; 黎武新; 龙善北
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2007-12-26
Filing date: 2007-12-26
Publication date: 2008-10-22
Anticipated expiration: 2017-12-26

Abstract

The utility model relates to a cylinder body foundry sand core, which adopts a full san core structure and comprises a cylinder body front head face sand core, a cylinder body left side surface sand core, a cylinder body right side surface sand core, a cylinder body top surface sand core, a cylinder body rear head face sand core and a cylinder body lumen sand core, and the sand cores are positioned by sand core rabbets and are locked by screws to form an integral sand core. The cylinder body foundry sand core has the advantages that the cylinder body foundry sand core can ensure the uniformity and the dimensional precision of wall thickness of cylinder thin wall cast and can increase the quality of surface appearance of the cast, and is suitable for cylinder body foundry technical process with various types.

Description

A kind of cylinder block casting sand core

Technical field

The utility model relates to a kind of cylinder block casting sand core, relate in particular to a kind of when casting cylinder block full core form the cylinder block casting sand core of foundry goods profile and inner chamber.

Background technology

In traditional casting cylinder block process, the inner chamber of cylinder block forms with core, and the profile of foundry goods forms with the wet casting mold of clay-bonded sand that the apperance moulding obtains.

This technology weak point is:

1, can only be applied on the highest of cylinder block left and right side and the little type of lowest surfaces difference in height, as shown in Figure 1.

2, cast outer surface is of poor quality.

3, casting dimension accuracy is poor, and evenness of wall thickness is poor.

Summary of the invention

At the deficiencies in the prior art, the utility model provides a kind of casting sand core that is used for the cylinder block casting, uses this casting sand core can improve the cylinder block outer surface quality, improves the thick uniformity of thin cylinder body wall, guarantees dimensional accuracy, moulding yield rate height.

The utility model cylinder block casting sand core adopts full sand core structure, comprise cylinder block front end face core, cylinder block left surface core, cylinder block right flank core, cylinder block cylinder end face core, cylinder block rear end face core, and cylinder block inner chamber core, above-mentioned core constitutes integral sand core with core tenon location and screw rod locking.

The utility model cylinder block casting sand core adopts in the full sand core structure, and foundry goods profile and inner chamber form by core.As shown in Figure 3, the peak of the utility model left surface has 200mm approximately to the difference in height of minimum point, when the left side of cylinder block or the highest of right flank big with the lowest surfaces difference in height, if adopt apperance to form the left and right side of cylinder block with the clay-bonded sand moulding, can easily cause the phenomenon that collapses type because of the molding difficulty, the moulding yield rate is low, even can not produce casting mold.The left and right side forms by core in the utility model, has overcome the problems referred to above.

By adopting above-mentioned technical scheme, the utility model can obtain following concrete beneficial effect:

1, improves the cylinder block outer surface quality.

2, improve the thick uniformity of thin cylinder body wall, guarantee dimensional accuracy.

3, moulding yield rate height.

Description of drawings

Fig. 1 is the more smooth cylinder block in left and right side.

Fig. 2-1 is a cylinder block stereogram of the present utility model.

Fig. 2-2 is another angle stereogram of the utility model cylinder block.

The integral sand core that Fig. 3 assembles for the utility model cylinder block.

Fig. 4 is the utility model cylinder block front end face core.

Fig. 5 is the utility model cylinder block left surface core.

Fig. 6 is the utility model cylinder block right flank core.

Fig. 7 is the utility model cylinder block cylinder end face core.

Fig. 8 is the utility model cylinder block rear end face core.

Fig. 9-1 is the utility model cylinder block inner chamber core stereogram.

Fig. 9-2 is another angle stereogram of the utility model cylinder block inner chamber core.

Mark the following drawings mark thereon in conjunction with the accompanying drawings:

1-cylinder front end face; 2-cylinder left surface; 3-cylinder right flank; 4-cylinder end face; 5-cylinder rear end face; The 6-cylinder inner cavity; 7-cylinder under-chassis face; 8-lock core screw rod; The 9-tenon; The 10-screw hole; 11-tenon recess; 11-cylinder block front end face core; 21-cylinder block left surface core; 31-cylinder block right flank core; 41-cylinder block end face core; 51-cylinder block rear end face core; 61-cylinder block inner chamber core.

The specific embodiment

Further specify the structure and the using method of the utility model cylinder block casting sand core below in conjunction with accompanying drawing.

As shown in Figure 3, cylinder block profile and inner chamber in the utility model form by core, the core group is by tenon location and screw rod locking assembling, the core assembly step is as follows: first horizontal positioned cylinder block end face core, adorn inner chamber core and front/rear end core thereon, inner chamber core and front/rear end core cooperate assurance core assembly dimensional accuracy by tenon, adorn the left and right side core then, with screw rod locking core group, with suspender the core group is hung in casting mold again.The concrete structure of each core is specifically determined according to the structure of institute's cast engine.

It should be noted that at last: above embodiment only in order to the explanation the utility model and and the described technical scheme of unrestricted the utility model; Therefore, although this specification has been described in detail the utility model with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the utility model; And all do not break away from the technical scheme and the improvement thereof of spirit and scope of the present utility model, and it all should be encompassed in the claim scope of the present utility model.

Claims

1, a kind of cylinder block casting sand core, it is characterized in that: the cylinder block casting sand core adopts full sand core structure, comprise cylinder block front end face core, cylinder block left surface core, cylinder block right flank core, cylinder block cylinder end face core, cylinder block rear end face core, and cylinder block inner chamber core, above-mentioned core constitutes integral sand core with core tenon location and screw rod locking.

2, according to the described cylinder block casting sand core of claim 1, it is characterized in that: inner chamber core and front/rear end core cooperate by tenon, and the left and right side core is locked with screw rod.