CN201744622U

CN201744622U - Barrel-shaped casting pouring sand molding box

Info

Publication number: CN201744622U
Application number: CN201020299664XU
Authority: CN
Inventors: 于忠良; 易宜祥; 刘小东
Original assignee: Sufa Hengdian Machinery Co Ltd CNNC
Current assignee: Sufa Hengdian Machinery Co Ltd CNNC
Priority date: 2010-08-18
Filing date: 2010-08-18
Publication date: 2011-02-16
Anticipated expiration: 2020-08-18

Abstract

The utility model provides a barrel-shaped casting pouring sand molding box, which comprises an upper sand molding box and a lower sand molding box; a sand core is arranged in a molding cavity defined by the upper sand molding box and the lower sand molding box; and the height of the inner chamber of the upper sand molding box is greater than that of the inner chamber of the lower sand molding box. Therefore, the sand molding box of the utility model can ensure that the wall thickness of the peak of the upper part of a casting in the upper sand molding box achieves the required minimum value, and needs not to be supplemented and corrected, thereby reducing the manufacturing cost.

Description

Casting sand mould box of cylindrical casting

Technical field

The utility model relates to casting field, is specifically related to casting sand mould box of cylindrical casting.

Background technology

Cylindrical casting needs casting sand mould box of cylindrical casting when casting, as depicted in figs. 1 and 2, the inner chamber height of last sand mould box 1 is identical with the inner chamber height of following sand mould box 2, the centre is provided with core 3, after molten metal enters die cavity, produce high temperature, make core 3 softening, occur bending and deformation, under the buoyancy function of molten metal, core 3 middle parts raise up as shown in Figure 3 and Figure 4, the wall thickness that portioned product is understood the top peak that cause the foundry goods in last sand mould box 1 because of this phenomenon is not enough, if will reach the requirement of requirement foundry goods, needs to increase a large amount of wall thickness as revisal, waste cost like this, increased casting weight.

Summary of the invention

Technical problem to be solved in the utility model is to provide casting sand mould box of cylindrical casting, can guarantee that the wall thickness of the top peak of foundry goods in the sand mould box meets the requirements of minimum, need not to do revisal, reduces production costs.

For solving above-mentioned existing technical problem, the utility model adopts following scheme: casting sand mould box of cylindrical casting, comprise sand mould box, following sand mould box, be provided with core in the die cavity that described upward sand mould box and following sand mould box form, the described inner chamber height of going up the inner chamber height of sand mould box greater than following sand mould box.

As preferably, the big 2～3mm of inner chamber height of sand mould box under the described inner chamber aspect ratio that goes up sand mould box.

As preferably, the big 2mm of inner chamber height of sand mould box under the described inner chamber aspect ratio that goes up sand mould box.

Beneficial effect:

The utility model adopts technique scheme that casting sand mould box of cylindrical casting is provided, and has guaranteed that the wall thickness of the top peak of foundry goods in the last sand mould box meets the requirements of minimum, need not to do revisal, has reduced production cost.

Description of drawings

Fig. 1 is the structural representation of existing casting sand mould box of cylindrical casting;

Fig. 2 is the cutaway view of A-A face among Fig. 1;

Fig. 3 is the structural representation after the existing casting sand mould box of cylindrical casting cast;

Fig. 4 is the cutaway view of B-B face among Fig. 3;

Fig. 5 is a structural representation of the present utility model;

Fig. 6 is the cutaway view of C-C face among Fig. 5;

Fig. 7 is the structural representation after the utility model cast;

Fig. 8 is the cutaway view of D-D face among Fig. 7.

The specific embodiment

As shown in Figure 5 and Figure 6, casting sand mould box of cylindrical casting comprises sand mould box 1, following sand mould box 2, is provided with core 3 in the die cavity that described upward sand mould box 1 and following sand mould box 2 form, the big 2mm of inner chamber height of sand mould box 2 under the inner chamber aspect ratio of described upward sand mould box 1.After molten metal enters die cavity, produce high temperature, make core 3 softening, occur bending and deformation, under the buoyancy function of molten metal, core 3 middle parts raise up as shown in Figure 7 and Figure 8, and the wall thickness of the top peak of foundry goods meets the requirements of minimum in the last sand mould box.The numerical value that the inner chamber height of sand mould box 2 is big under the inner chamber aspect ratio of last sand mould box 1 is relevant with the wall thickness of cylindrical casting, about the wall thickness 50mm of general cylindrical casting, and the big 2～3mm of inner chamber height of sand mould box 2 under the inner chamber aspect ratio of last sand mould box 1.

Claims

1. casting sand mould box of cylindrical casting, comprise sand mould box (1), following sand mould box (2), be provided with core (3) in the die cavity that described upward sand mould box (1) and following sand mould box (2) form, it is characterized in that: the described inner chamber height of going up the inner chamber height of sand mould box (1) greater than following sand mould box (2).

2. casting sand mould box of cylindrical casting according to claim 1 is characterized in that: the big 2～3mm of inner chamber height of sand mould box (2) under the inner chamber aspect ratio of described upward sand mould box (1).

3. casting sand mould box of cylindrical casting according to claim 2 is characterized in that: the big 2mm of inner chamber height of sand mould box (2) under the inner chamber aspect ratio of described upward sand mould box (1).