CN202934079U

CN202934079U - Sand core box for casting of train wheels

Info

Publication number: CN202934079U
Application number: CN 201220574262
Authority: CN
Inventors: 胡长岭; 邬刚; 杨召利; 张思瑾; 王治纲
Original assignee: XINYANG AMSTED TONGHE WHEELS CO Ltd
Current assignee: XINYANG AMSTED TONGHE WHEELS CO Ltd
Priority date: 2012-11-05
Filing date: 2012-11-05
Publication date: 2013-05-15
Anticipated expiration: 2022-11-05

Abstract

The utility model discloses a sand core box for casting of train wheels. The sand core box comprises an upper core box body and a lower core box body, and is characterized in that 12 vent holes are uniformly distributed on a circle taking the center of the upper core box body as a circle center, a sunk step is arranged in a position where the inner chamber of the lower core box body and the upper core box body are contacted, and a crevice with the height of 0.03 to 0.19 mm is formed between the step and the upper core box body; the vent holes are communicated with the inner chamber of the lower core box body through the crevice; and the diameter of each vent hole is 6 mm. The sand core box can thoroughly solve the problem of mould sticking of a sand core seat and virtual sand at the periphery of the sand core seat, not only reduces reject ratio of wheels, and improves appearance of sand core, but also remarkably reduces the cleaning frequency of the sand core box.

Description

The middle core box that the casting train wheel is used

Technical field

The utility model relates to a kind of middle core box that train wheel is used of casting, and belongs to the Ferrous Metallurgy mechanical equipment technical field.

Background technology

During the casting train wheel, need to form the wheel hub bore with core, this core forms the mould of SMIS middle core box SMIS.SMIS is penetrated sand by core shooter by middle core box and is shaped, and therefore, middle core box is the key factor of penetrating SMIS quality good job processed.

In prior art, because middle core box exhaust has some setbacks, the SMIS core print seat place of penetrating after system is prone to sticking to mould, falls piece and empty sand phenomenon, and this phenomenon is prone to wheel Radiation plate holder foreign material waste product, causes the wheel percent defective higher.

No. 201120185204.9 patent of Chinese patent discloses a kind of center core box ejector rod that train wheel is used of casting, and this patent has increased through hole on center core box ejector rod, can make the smooth exhaust of sand mold, reduced the empty sand of middle core print seat and mold sticking.But because core sand is thinner, when hitting core, the fine sand of parcel cold core resin easily enters in the venting plug gap that width is 0.25mm, make sand grains and middle core print seat in the gap that certain bond strength be arranged after blowing the triethylamine sclerosis, during the demoulding, easily make the core print seat band at venting plug place fall a sand, just form pit at middle core print seat place like this.Moreover, empty sand phenomenon also often appears in the sharp corner of SMIS periphery; And every 5 moulds, the staff just need crawl into the high core shooter internal cavities of 0.9m and draw the bar seam that digs each venting plug, require great effort time-consuming, to clear up frequency high, causes output to can not get effective raising.

The utility model content

The utility model provides a kind of middle core box that train wheel is used of casting for addressing the above problem.During the utility model can thoroughly solve, the empty sand problem of core print seat sticking to mould and middle core print seat periphery, not only reduced the wheel percent defective, improved the outward appearance of SMIS, the cleaning frequency of core box in also significantly reducing simultaneously.

For achieving the above object, the technical solution adopted in the utility model is as follows:

A kind ofly cast the middle core box that train wheel is used, comprise core box, lower core box, it is characterized in that: above core box center is to be evenly equipped with 12 steam vents on the circle in the center of circle, there is the step of depression the position that lower core box inner chamber contacts with upper core box, the finedraw height that forms between step and upper core box is 0.03-0.19mm, and steam vent is communicated with by the inner chamber of finedraw with lower core box.

Aforementioned steam vent diameter is 6mm.

Finedraw circularizes the exhaust passage along the inner chamber circumferential, through steam vent and extraneous intercommunication, has thoroughly solved the empty sand problem of middle core print seat sticking to mould and middle core print seat periphery.Not only improve the outward appearance of SMIS, also reduced the field trash percent defective of wheel, also made simultaneously the SMIS operative employee reduce half to the frequency of core box cleaning on SMIS, significantly improved the production efficiency of casting train wheel.

Description of drawings

Shown in Figure 1 is structural representation of the present utility model.

Shown in Figure 2 is top view of the present utility model.

Being labeled as shown in figure: 1, upper core box; 2, lower core box; 3, finedraw; 4, steam vent; 5, inner chamber.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

As shown in Figure 1 and Figure 2, a kind ofly cast the middle core box that train wheel is used, comprise core box (1), lower core box (2), above core box (1) center is to be evenly equipped with 12 steam vents (4) on the circle in the center of circle, there is the step of depression the position that the inner chamber (5) of lower core box (2) contacts with upper core box (1), in the present embodiment, the finedraw (3) that forms between step and upper core box (1) is highly 0.1mm, and steam vent (4) is communicated with the inner chamber (5) of lower core box (2) by finedraw (3).Steam vent (4) diameter is 6mm.

Claims

1. cast the middle core box that train wheel is used for one kind, comprise core box (1), lower core box (2), it is characterized in that: above core box (1) center is to be evenly equipped with 12 steam vents (4) on the circle in the center of circle, there is the step of depression the position that the inner chamber (5) of lower core box (2) contacts with upper core box (1), in the present embodiment, the finedraw (3) that forms between step and upper core box (1) is highly 0.1mm, and steam vent (4) is communicated with the inner chamber (5) of lower core box (2) by finedraw (3).

2. a kind of middle core box that train wheel is used of casting according to claim 1, it is characterized in that: steam vent (4) diameter is 6mm.