CN2654251Y

CN2654251Y - Metallic casting ball sand covering mould

Info

Publication number: CN2654251Y
Application number: CN 03259852
Authority: CN
Inventors: 陈宗明; 陈晓; 李水根; 周利生; 周元行; 赵金华; 俞海清
Original assignee: ANHUI NINGGUO WEAR RESISTANT M
Current assignee: Anhui FENGXING Wear Resistant Materials Ltd.
Priority date: 2003-07-25
Filing date: 2003-07-25
Publication date: 2004-11-10
Anticipated expiration: 2013-07-25

Abstract

The utility model relates to a metal cast ball sand-lined die, which comprises an upper moulding board and a lower moulding board. A direct gate is arranged in the center of the upper moulding board. The utility model is characterized in that at least three ball sockets are arranged correspondingly on the upper moulding board and the lower moulding board around the direct board; a cross gate and a riser are arranged along the outer side of each ball socket; at least three ball sockets are arranged around the riser; a layer of resin sand is coated on the inner surface of the ball sockets; the thickness of the covering sand is two to six millimeters. The utility model has the advantages of sand-type ventilation and withdrawing capacity, and metal-type rigidity and heat conductivity; the metallographic structure of the cast ball is compact and even; the mechanical performance is good; the size precision and surface finish are greatly improved; the percentage of acceptable products and the technological yield of the product are significantly improved; the service life of the metal dies is greatly improved; the mechanical processing strength of the cast balls are greatly reduced; the production efficiency of the cast balls are improved; the production cost is reduced.

Description

Metal casting ball covers the sand mo(u)ld tool

Affiliated technical field

The utility model relates to a kind of metal Mould for casting ball, and especially a kind of metal casting ball covers the sand mo(u)ld tool.

Background technology

Metal casting ball is widely used in the powder technology of industries such as mine, building materials, thermoelectricity, chemical industry.At present, known many balls mould has two kinds on sand mo(u)ld and metal pattern.The major technique defective of sand mo(u)ld is that the size and the surface smoothness of foundry goods is difficult for grasping, and metal pattern then can cold shut, seminess occur because of metal liquid cools off the too fast foundry goods that causes, and has influenced the quality of foundry goods greatly.In recent years, novel casting technology ... metal pattern covers the sand technology comparatively fast to be used and is developed.It is to be covered with the skim molding sand at the metal die inner chamber and to form a kind of novel casting technology of casting mold that metal pattern covers the sand foundry engieering, it has absorbed the advantage of sand casting technology and die cast technology, overcome the technological deficiency of the two, be characterized in that sand using amount is few, yield rate is high, the physical property and the surface smoothness of foundry goods increase substantially, and production cost significantly reduces.But this technology is implemented to rely on the covering property of mould to resin sand, so this technology is difficult to use in some special dies, as still there is not the application precedent in the metal Mould for casting ball.

Summary of the invention

For overcoming the technological deficiency of existing casting ball sand mo(u)ld and metal pattern, the metal pattern sand-covering technique is applied in the Mould for casting ball, the utility model provides a kind of metal casting ball to cover the sand mo(u)ld tool.

The technical scheme that its technical problem that solves the utility model adopts is: it is made up of a cope match-plate pattern and a lower bolster, be provided with a down gate at the cope match-plate pattern center, correspondence is provided with some rising heads and ball bowl on cope match-plate pattern and the lower bolster inner plate surface, the ball bowl bottom is provided with a steam vent, it is characterized in that: on around down gate, on the lower bolster respectively correspondence be provided with three above ball bowls, be provided with cross gate and rising head along each ball bowl outside, around described rising head, be provided with three above ball bowls, described ball bowl inner surface is covered with one deck resin sand, and covering sand thickness is 2-6mm.

Be preferably: covering sand thickness is 3mm.

The beneficial effect that the utility model produced is:

1, is applicable to that diameter is the casting ball production of 60-90mm, owing to adopt the resin sand coating, make casting mold have the rigidity of the gas permeability of sand mold, deformability and metal mold, the advantage of thermal conductivity simultaneously, after metal liquid poured into the casting chamber, its cooling velocity has improved 3-6 doubly than sand mo(u)ld, and was more lower slightly than metal pattern, casting ball structure is evenly fine and close, satisfactory mechanical property, dimensional accuracy and surface smoothness improve greatly, and the product yield and the percentage of A-class goods of product significantly improve;

2, because the metal die die cavity is covered with molding sand, and molten iron does not directly contact with the metal pattern die cavity in casting cycle, the probability of metal pattern generation heat fatigue and fire check reduces significantly, thereby significantly improved the service life of metal pattern;

3, adopt the casting ball dimensional accuracy and the surface smoothness of this mould production to be improved, significantly reduced the machining intensity of casting ball, thereby improved casting ball production efficiency, reduced production cost.

Description of drawings

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

Fig. 2 is the A-A cutaway view of Fig. 1.

1. cope match-plate patterns among the figure, 2. lower bolster, 3. down gate, 4. ball bowl, 5. cross gate, 6. rising head, 7. steam vent.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is further specified:

Embodiment:

The utility model is made up of a cope match-plate pattern 1 and a lower bolster 2, be provided with a down gate 3 at the cope match-plate pattern center, correspondence is provided with 5 ball bowls 4 respectively on the upper and lower template around the down gate 3, be provided with cross gate 5 and rising head 6 along each ball bowl outside, around rising head 6, be provided with 4 ball bowls 4, described ball bowl 4 inner surfaces are covered with one deck resin sand, and covering sand thickness is 3mm.

When covering sand, will cover the special-purpose template of sand and be enclosed within respectively on cope match-plate pattern and the lower bolster, keep the 3mm distance between the die cavity of template and template, and penetrate the sand machine by special use resin sand is injected in the metal die cavity, and make resin sand solidify promptly to form by heating and cover layer of sand.

Claims

1, metal casting ball covers the sand mo(u)ld tool, form by a cope match-plate pattern and a lower bolster, be provided with a down gate at the cope match-plate pattern center, correspondence is provided with half rising head and ball bowl on cope match-plate pattern and the lower bolster inner plate surface, the ball bowl bottom is provided with a steam vent, it is characterized in that: correspondence is provided with three above ball bowls respectively on the upper and lower template around the down gate, is provided with cross gate and rising head along each ball bowl outside, be provided with three above ball bowls around described rising head, described ball bowl inner surface is covered with one deck resin sand.

2, metal casting ball covers the sand mo(u)ld tool according to claim 1, and it is characterized in that: the sand thickness that covers of described ball bowl upper inner surface is 2-6mm.

3, metal casting ball covers the sand mo(u)ld tool according to claim 1, and it is characterized in that: the sand thickness that covers of described ball bowl inner surface is 3mm.