CN210475411U

CN210475411U - Wax mold for preventing insufficient pouring of cast aluminum alloy impeller blade part

Info

Publication number: CN210475411U
Application number: CN201921331890.9U
Authority: CN
Inventors: 张明成; 杨宝银; 陈东亮
Original assignee: Yangxin Dongtai Precision Metal Co ltd
Current assignee: Yangxin Dongtai Precision Metal Co ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2020-05-08
Anticipated expiration: 2029-08-16

Abstract

The utility model discloses a prevent that casting aluminium alloy impeller blade position from pouring wax matrix not enough, the wax matrix includes the runner, with the die cavity mould of runner intercommunication, the die cavity mould is cylindrical structure, and evenly distributed is by the blade chamber mould that convex blade profile and spill blade profile are constituteed on the annular curved surface of die cavity mould, the outer end of blade chamber mould sets up the circle. When a wax mould is unshelled in a shell, a cavity, a blade cavity communicated with the cavity and a circle cavity communicated with the blade cavity are formed, when molten aluminum is injected into the cavity through a pouring gate, because an additional circle is arranged, the positions of the convex blade profile and the concave blade profile are not the tail ends of the molten aluminum filling, the tail ends of the convex blade profile and the concave blade profile are changed into circles, after the blank casting is finished, the additional circle outside the convex blade profile and the concave blade profile are removed through machining, and the pouring gate is removed to obtain a qualified product; the utility model provides an unable complete fashioned problem in blade position during the pouring.

Description

Wax mold for preventing insufficient pouring of cast aluminum alloy impeller blade part

Technical Field

The utility model relates to a wax matrix, in particular to prevent that casting aluminum alloy impeller blade position from pouring not enough wax matrix.

Background

At present, the investment precision casting method is mainly adopted to produce and cast the aluminum alloy impeller in China, the shape of a wax pattern used in the prior art is consistent with that of a part, but a qualified part blank cannot be cast, and particularly, a blade part cannot be integrally formed during pouring. The analysis reason mainly has two aspects: firstly, the flowability of cast aluminum alloy is poor, and the thin-wall part is difficult to completely fill the mold; secondly, the air permeability of the mould shell is poor, and a large air resistance is formed in the end cavity of the blade. The method is a difficult problem which cannot be overcome during the precision investment casting of the aluminum alloy, in order to successfully cast the parts, a replacement casting method can be used, or the shell is vacuumized to reduce the air resistance, but the production condition is higher, and if the blank of the part is not improved, the blank cannot be produced.

Disclosure of Invention

The utility model discloses a remedy prior art not enough, provide a prevent that casting aluminum alloy impeller blade position from pouring not enough wax matrix.

The utility model discloses a realize through following technical scheme: the utility model provides a prevent that casting aluminum alloy impeller blade position from pouring wax matrix not enough, includes the wax matrix, the wax matrix includes the runner, with the die cavity mould of runner intercommunication, the die cavity mould is cylindrical structure, the blade die cavity mould that evenly distributed comprises convex blade profile and concave blade profile on the annular curved surface of die cavity mould, the outer end of blade die cavity mould sets up the circle.

Preferably, the thickness of the circle is 5 mm.

Preferably, the height of the circle exceeds the height of the blade cavity mold.

Preferably, the surface of the wax mould is coated with a shell.

Preferably, the voids are uniformly distributed within the shell.

Compare earlier with prior art, the beneficial effects of the utility model are that: the utility model discloses an add outside circle, make the wax matrix desorption back in the shell, form the very big circle cavity in a space. When aluminum liquid is injected into the cavity through the pouring gate, gas in the cavity is pushed by the aluminum liquid to be discharged to the outside through the pores on the shell; through the additionally arranged circle, the blade part is not the tail end of the aluminum liquid filling, and the tail end is changed into the circle part; in the process that the aluminum liquid is filled into the cavity of the circle part through the cavity of the blade part, the cavity of the blade part is heated, and the temperature of the cavity is increased; the cavity in the circle can contain gas which is not discharged to the outside of the shell, and the gas resistance formed at the blade part is avoided. Through the utility model discloses the thin wall blade position of impeller part that makes no longer appears can not complete fashioned difficult problem.

Drawings

The present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a front view of the present invention;

fig. 3 is a schematic structural view of a wax pattern without a circle.

In the figure, 1, wax mold, 2, pouring gate, 3, cavity mold, 4, circle, 5, convex blade mold surface, 6, concave blade mold surface, 7, blade cavity mold, 8, shell, 9 and pore.

Detailed Description

The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.

As shown in fig. 1, 2 and 3, the wax mold for preventing insufficient pouring at the blade part of the cast aluminum alloy impeller, wherein the wax mold 1 comprises a pouring gate 2 and a cavity mold 3 communicated with the pouring gate 2, the cavity mold 3 is of a cylindrical structure, a blade cavity mold 7 consisting of a convex blade mold surface 5 and a concave blade mold surface 6 is uniformly distributed on an annular curved surface of the cavity mold 3, a circle 4 is arranged at the outer end of the blade cavity mold 7, the thickness of the circle 4 is 5mm, the height of the circle 4 exceeds the height of the blade cavity mold 7, a mold shell 8 is coated on the surface of the wax mold 1, and pores 9 are uniformly distributed in the mold shell 8.

After the wax mold 1 is unshelled in the shell 8, the cavity mold 3 forms a cavity, the blade cavity mold 7 forms a blade cavity communicated with the cavity, and the circle 4 forms a circle cavity communicated with the blade cavity, when molten aluminum is injected into the cavity through the pouring gate 2, gas in the cavity is discharged to the outside through the pore 9 in the shell 8 under the pushing of the molten aluminum, and because the pore 9 in the shell 8 is very small, redundant gas can not be discharged to the outside. The redundant gas is finally pushed into the circular cavity, and because the circular cavity has a large volume, although the pushed gas exists, the gas escapes through the pores 9 in the shell 8, the gas pressure in the circular cavity hardly rises, and resistance is not caused to the mold filling of the aluminum liquid. Meanwhile, because the circle 4 is additionally arranged, the positions of the convex blade molded surface 5 and the concave blade molded surface 6 are not the tail ends of the molten aluminum mold filling any more, and the tail ends are changed into the circle 4. And in the process of filling the aluminum liquid into the circular cavity through the blade cavity, the blade cavity is heated, and the temperature of the cavity is increased.

After the blank casting is finished, the additionally arranged outer circle 4 is removed through machining, and a qualified product is obtained after the sprue 2 is removed. The problem that the thin-wall blade part of the impeller part cannot be integrally formed is solved.

Claims

1. The utility model provides a prevent that casting aluminium alloy impeller blade position from pouring wax matrix not enough which characterized in that: wax matrix (1) includes runner (2), and die cavity mould (3) with runner (2) intercommunication, die cavity mould (3) are cylindrical structure, and evenly distributed is gone up by convex blade profile (5) and blade cavity mould (7) that concave blade profile (6) are constituteed on the annular curved surface of die cavity mould (3), the outer end of blade cavity mould (7) sets up circle (4).

2. The wax mold for preventing the insufficient pouring of the blade part of the cast aluminum alloy impeller according to claim 1, wherein: the thickness of the circle (4) is 5 mm.

3. The wax mold for preventing the insufficient pouring of the blade part of the cast aluminum alloy impeller according to claim 1, wherein: the height of the circle (4) exceeds the height of the blade cavity die (7).

4. The wax mold for preventing the insufficient pouring of the blade part of the cast aluminum alloy impeller according to claim 1, wherein: the surface of the wax mould (1) is coated with a shell (8).

5. The wax pattern for preventing the insufficient pouring of the cast aluminum alloy impeller blade part according to the claim 4, wherein: pores (9) are uniformly distributed in the shell (8) layer.