CN202438659U

CN202438659U - Water jacket sand core

Info

Publication number: CN202438659U
Application number: CN2011205719319U
Authority: CN
Inventors: 陈灵巧
Original assignee: Shanghai Aishida Automotive Components Co Ltd
Current assignee: Shanghai Aishida Automotive Components Co Ltd
Priority date: 2011-12-31
Filing date: 2011-12-31
Publication date: 2012-09-19
Anticipated expiration: 2021-12-31

Abstract

The utility model discloses a water jacket sand core, which is used for casting engine cylinder covers and comprises a sand core body. A plurality of sand core air inlets penetrating through the sand core body and a plurality of sand core air exhaust holes penetrating through the sand core body are positioned on the sand core body, a sand core cavity is arranged on the upper surface of the sand core body, a sand core cover plate is positioned on the sand core cavity, and the sand core cavity is sealed by the sand core cover plate. The water jacket sand core has the advantages of reducing air exhaust amount in processes producing castings in complex shapes and of complex structures, overcoming the defects that air pores are prone to be generated on castings, and the castings can loosen and shrink, improving product percent of pass, improving labor environment, simultaneously reducing labor intensity of operators and improving production efficiency.

Description

A kind of sand core of water jacket

Technical field

The utility model relates to a kind of sand core of water jacket that is used for the engine cylinder cover casting.

Background technology

Engine cylinder cover is the critical component of engine, and its outline is for being about 400mm * 170mm * 120mm.The client is complete to casting dimension precision prescribed height, flat appearance, clear-cut; The foundry goods dense internal organization, casting flaws such as pore-free, shrinkage porosite; The requirement castings material is an alusil alloy, and tensile strength >=235Mpa that material is corresponding extends >=1, and requires under the 2bar air pressure, not have leakage; Again because the foundry goods uniform wall thickness is interval at 4-5mm, but exist the many places wall thickness difference at the isolated thick big shape and structure more than 2 times; And the jacket core gas forming amount is big, and because structural limitations, effectively exhaust, and it is bigger therefore to cast difficulty, is prone to produce pore and shrinkage defect, and this unreasonablely has much relations with sand core of water jacket in the casting die designs.

The utility model content

The purpose of the utility model is in order to overcome the deficiency of prior art, a kind of sand core of water jacket to be provided, and it can solve the effectively exhaust of traditional sand core of water jacket, thereby causes foundry goods to produce the technical problem of pore and defectives such as pine contracts.

A kind of technical scheme that realizes above-mentioned purpose is: a kind of sand core of water jacket; Comprise the core body; Some core air admission hole and some core steam vents that run through said core body up and down that run through said core body up and down are set on the said core body, it is characterized in that:

Upper surface at said core body is provided with the core cavity, on the said core cavity core cover plate is set, and said core cover plate seals said core cavity.

Further, the said core cavity of stating is arranged between said core air admission hole and the said core steam vent.

Further, said sand core of water jacket body and said core cover plate are all processed by precoated sand.

Adopted the technical scheme of a kind of sand core of water jacket of the utility model, promptly the upper surface at the core body of said sand core of water jacket is provided with the core cavity, on the said core cavity core cover plate is set, and said core cover plate seals said core cavity.Its technique effect is: in the process of producing the shape and structure intricate casting; Reduced the capacity of sand core of water jacket; Avoid defectives such as foundry goods generation pore, pine contract, improved product percent of pass, when having improved the work situation condition; Reduce labor intensity of operating personnel, improved production efficiency.

Description of drawings

Fig. 1 is the structural representation of a kind of sand core of water jacket of the utility model.

The specific embodiment

See also Fig. 1,, pass through embodiment particularly below, and combine accompanying drawing at length to explain in order to understand the technical scheme of the utility model better:

See also Fig. 1; A kind of sand core of water jacket of the utility model; Comprise core body 1; Some core air admission holes that run through said core body 1 up and down 11 and some core steam vents 12 that run through said core body 1 up and down are set on the said core body 1, core cavity 13 are set, on the said core cavity 13 core cover plate 14 is set at the upper surface of said core body 1; The size of the size of said core cover plate 14 and said core cavity 13 is complementary, and makes said core cover plate 14 with said core cavity 13 sealings.

After a kind of sand core of water jacket of the utility model is put into the die cavity of swaging die; Said core body 1 is said core body 1 lower surface towards a side of said die cavity bottom surface, and a so said side of stating cover core body 1 said dorsad die cavity bottom surface is said core body 1 upper surface

The purpose of design is like this: a kind of sand core of water jacket that adopts the utility model; In the process of producing the such shape and structure intricate casting of engine cylinder cover, reduced the capacity of sand core of water jacket, avoid defectives such as foundry goods generation pore, pine contract; Improved product percent of pass; When having improved the work situation condition, reduced labor intensity of operating personnel, improved production efficiency.

In the present embodiment, said core cavity 13 is between said core air admission hole 11 and said core steam vent 12, and the sand core of water jacket of design has higher intensity like this.

In the present embodiment.Said core body 1 is that 50 to 100 purpose precoated sands are processed by particle diameter all with said core cover plate 14.

A kind of sand core of water jacket processing technology of the utility model comprises the following steps: to process water jacket core mold step, core body making step and core cover plate making step and forming step;

In the said processing water jacket core mold step; Said sand core of water jacket mould is a metal die; Through boss of processing on the bottom surface of the die cavity of said sand core of water jacket mould; The position of said boss is corresponding to the position of said core cavity 13 at said core body 1 upper surface, thereby after said core body making step and the completion of core cover plate making step, the upper surface of the core body 1 of said sand core of water jacket forms a core cavity 13;

Before said core body making step, said sand core of water jacket mould is 220 ℃ of-400 ℃ of following preheatings.

In core body making step and said core cover plate step, make said sand core of water jacket body 1 and said core cover plate 14 respectively;

Said forming step is that said core cover plate 14 is covered on said core cavity 13, makes said core cavity 13 sealings.

Those of ordinary skill in the art will be appreciated that; Above embodiment is used for explaining the utility model; And be not the qualification that is used as the utility model; As long as in the connotation scope of the utility model, all will drop in claims scope of the utility model variation, the modification of the above embodiment.

Claims

1. sand core of water jacket; Comprise core body (1); Some core air admission hole (11) and some core steam vents (12) that run through said core body (1) up and down that run through said core body (1) up and down are set on the said core body (1), it is characterized in that:

Upper surface at said core body (1) is provided with core cavity (13), and core cover plate (14) is set on the said core cavity (13), and said core cover plate (14) seals said core cavity (13).

2. sand core of water jacket according to claim 1 is characterized in that: the said core cavity (13) of stating is arranged between said core air admission hole (11) and the said core steam vent (12).

3. sand core of water jacket according to claim 1 and 2 is characterized in that: said sand core of water jacket body (1) and said core cover plate (14) are all processed by precoated sand.