CN1433857A

CN1433857A - Disposable casting products moulding device

Info

Publication number: CN1433857A
Application number: CN 02128099
Authority: CN
Inventors: 张西文
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-12-26
Filing date: 2002-12-26
Publication date: 2003-08-06
Anticipated expiration: 2022-12-26
Also published as: CN1203940C

Abstract

The moulding equipment for casting finished product by one-step operation is characterized by that aluminia ceramic mold is formed from left half mold and right mold, and in the interior of the left half mold and right half mold there is a sand mold cavity filled up with molding sand, said sand mold cavity and the internal cavity wall matched with external form of casting are formed into mold cavity, and a standard sand core body made up according to a certain required accuracy is fixed in the mold cavity of the alumina ceramic mold. Said invention fully utilizes the features of alumina ceramic material which is resistant to high temp., does not deform at high-temp. and is high in hardness to make it into casting mold body instead of traditional sand casting technology so as to implement said invention.

Description

Disposable casting products moulding device

Technical field: the present invention relates to pattern foundry engieering device, relate in particular to disposable casting products moulding device.

Technical background: along with the foundary industry development, cast casting often adopts the sand casting blank, is processed into finished parts through the Seiko technology again and obtains, and the approach labour intensity of this acquisition cast member is big, operation is many, economic benefit is low.For example need to cast one section tapped steel pipe casting finished products in two, during traditional sand casting, do not processing die on the core, but be cast as blank, also need Seiko to become screw thread to obtain at foundry goods two ends car.

Technology contents:

The objective of the invention is to overcome that labour intensity is big in the prior art sand casting blank, operation is many, inefficient shortcoming, a kind of disposable casting products moulding device is provided, the foundry goods of its casting can one-shot forming.

Technical scheme: disposable casting products moulding device comprises:

Aluminium oxide ceramics pattern 1 is made up of as the left half mould mould 1A and the right half mould mould of material aluminium oxide ceramics, the pattern tool that left side half mould mould 1A and right half mould mould are composed of a fixed connection complete with pin 6, sand mold chamber 10 for filling molding sand 9 in left side half mould mould 1A and the right half mould mould, the internal chamber wall 4 that matches with required foundry goods profile forms die cavity 2, in die cavity 2, place core body 3, core body 3 is fixed on the core print seat 18 of 2 li of die cavities, and die cavity 2 is communicated with the plug hole 7 on its top;

Die cavity 2 is communicated with respectively with heat extraction hole 17A, the 17B of core body 3;

The heat extraction hole 13 of the upper position of die cavity 2 is communicated with the heat extraction chamber 11 on its top, and heat extraction chamber 11 is communicated with the heat extraction hole 12 on its top;

The mouth position horizontal line 15 of plug hole 7 and the base horizontal line 16 in heat extraction chamber 11 are point-blank.

Operation principle:

Using method: at first core body 3 is made according to certain required precision, core body 3 is fixed on forms die cavity 2 in the inner chamber of aluminium oxide ceramics pattern 1, left half mould mould 1A and right half mould mould are closed up, molten metal is poured in the plug hole 7, be full of die cavity 2 casting molds, make full use of the heat extraction degassing function of

heat extraction hole

12,8,17A, 17B, make the molten metal cooling forming, after molten metal solidifies, open pattern 1, the taking-up foundry goods is imbedded in the sand drift and is cooled off.Under the not really high condition of required precision, directly install and use.Aluminium oxide ceramics pattern 1 can be reused again.

Advantage: disposable casting products moulding device is to have resistance to elevated temperatures according to alumina ceramic material, can under 2000 ℃ of high temperature, use, at high temperature any variation does not take place in its bodily form, the design of characteristic principles such as alumina ceramic material hardness height, the method that replaces traditional sand casting foundry goods, can alleviate foundry work, Seiko labour intensity greatly, improve casting speed, obtain high economic benefit.

Description of drawings:

Fig. 1 is a disposable casting products moulding device of the present invention left side structure chart.

Fig. 2 is a C-C direction cutaway view among Fig. 1.

The specific embodiment: see Fig. 1,

Disposable casting products moulding device comprises:

See Fig. 2, molding sand 9 is filled for 10 li in the molding sand chamber, and many steam vents 8 are arranged in the molding sand 9, and a plurality of little hot types hole 5 is arranged on the internal chamber wall 4, and little hot type hole 5 is communicated with by the gap between sand grains with steam vent 8.

Assembling process:

See Fig. 1, at first make core body 3, be fixed on the core print seat 18 of 2 li of die cavities of aluminium oxide ceramics pattern 1 by certain required precision.For example as shown in Figure 1, need one section tapped steel pipe casting finished products in two of casting, when making its core body 3 o'clock, can be on the two ends system of core body 3 die 14;

See Fig. 1, molding sand 9 is put into the sand mold chamber 10 of left half mould mould 1A and right half mould mould respectively, compress molding sand 9, in molding sand 9, prick a plurality of heat extractions hole 8 with pin then, the core body 3 that to make certain precision more in advance is fixed on 2 li of the die cavities of the left half mould mould 1A that lies against ground, then that left half mould mould 1A and right half mould mould is fixing with pin 6, form complete aluminium oxide ceramics pattern 1.

For the ease of combination, separate left half mould mould 1A and right half mould mould, take out foundry goods, with the axis of symmetry place of aluminium oxide ceramics pattern 1 interface as left and right two halves pattern.

Fig. 1 is an example, can also make the shape of the corresponding die cavity body of various kinds core body 3 and aluminium oxide ceramics pattern 1 by certain required precision.The position, exhaust passage of core can need to be provided with by it in the sand mold chamber 10.

The aluminium oxide ceramics pattern can use under up to 2000 ℃ high temperature, and its die cavity does not deform, die cavity hardness height.Depress at 1 normal atmosphere, the fusing point of pure iron is 1535 ℃, and the fusing point of steel is 1515 ℃, and the fusing point of casting pig is 1177 ℃, and the copper fusing point is 1083 ℃, and the fusing point of gold is 1064 ℃, is that pattern is feasible so select alumina ceramic material.

Claims

1, disposable casting products moulding device is characterized in that:

Aluminium oxide ceramics pattern (1) is made up of as the left half mould mould (1A) and the right half mould mould of material aluminium oxide ceramics, the pattern tool that left side half mould mould (1A) and right half mould mould are composed of a fixed connection complete with pin (6), sand mold chamber (10) for filling molding sand (9) in left side half mould mould (1A) and the right half mould mould, the internal chamber wall (4) that matches with required foundry goods profile forms die cavity (2), in die cavity (2), place core body (3), core body (3) is fixed on the core print seat (18) of die cavity (2) lining, and die cavity (2) is communicated with the plug hole (7) on its top; Die cavity 2 is communicated with respectively with the heat extraction hole (17A, 17B) of core body 3; The heat extraction hole (13) of the upper position of die cavity (2) is communicated with the heat extraction chamber (11) on its top, and heat extraction chamber (11) are communicated with the heat extraction hole (12) on its top.

2, disposable casting products moulding device according to claim 1 is characterized in that: the mouth position horizontal line (15) of plug hole (7) and the base horizontal line (16) in heat extraction chamber (11) are point-blank; Many steam vents (8) are arranged in the molding sand (9), a plurality of little hot types holes (5) are arranged on the internal chamber wall (4), little hot type hole (5) is communicated with by the gap between sand grains with steam vent (8).