CN218903535U

CN218903535U - Auxiliary device for closed lost foam casting system

Info

Publication number: CN218903535U
Application number: CN202223058983.3U
Authority: CN
Inventors: 刘宜洁; 张桂卫; 靳虎平; 王娟宁; 王瑞; 李敬; 王超
Original assignee: Baiyin Hengcheng Machinery Manufacturing Co ltd; Baiyin Nonferrous Group Co Ltd
Current assignee: Baiyin Hengcheng Machinery Manufacturing Co ltd; Baiyin Nonferrous Group Co Ltd
Priority date: 2022-11-17
Filing date: 2022-11-17
Publication date: 2023-04-25
Anticipated expiration: 2032-11-17

Abstract

The utility model discloses an auxiliary device for a closed lost foam casting system, which belongs to the technical field of metal processing and comprises a pouring cup, wherein one end of the bottom of the pouring cup is connected with a first bottom-leaking sawtooth, one end of the first bottom-leaking sawtooth is connected with a pouring nest inlet, the pouring nest inlet is connected with a pouring nest outlet, the pouring nest outlet is connected with a second bottom-leaking sawtooth, one end of the second bottom-leaking sawtooth is communicated with a cross runner, one end of the cross runner is connected with a casting position, and a filter screen is arranged on the cross runner, so that the auxiliary device has the beneficial effects that: the full-flow state of the pouring process of the liquid metal is always kept, the liquid metal is accelerated to be rushed up to the first bottom leakage saw tooth through the R15 ramp after entering the sprue cup 1, the liquid metal is under the action of gravity, the impurity floats upwards to block a part of slag, the liquid metal obtains the force of secondary floating to the second bottom leakage saw tooth again through the buffer bag to continuously block the slag, the task of cleaning the impurity is completed after the slag is blocked twice, and the impurities are removed from the cross runner sprue to the casting.

Description

Auxiliary device for closed lost foam casting system

Technical Field

The utility model belongs to the technical field of metal processing, and particularly relates to an auxiliary device for a closed lost foam casting system.

Background

In-situ production experience teaches that firstly, impurities in liquid metal can generate forming defects such as shrinkage cavities, sand holes and the like and incomplete foam gasification at the positions of the surface of a casting and the inner part of a casting structure. Secondly, the infiltration mode of the liquid metal in the cavity and the cavity wall in the lost foam casting is different from that in the traditional casting, wherein the traditional casting is liquid-gas infiltration, and the lost foam casting is liquid-solid infiltration. In the filling process, the traditional casting is based on static pressure, the liquid is in a convex shape, and inclusions can float upwards and be discharged from a riser; the lost foam casting metal liquid surface is pulled by negative pressure, the liquid surface is concave, and inclusions in the metal liquid can be firmly adsorbed on a coating (cavity wall) to form a wall attaching effect.

If the molten metal is recycled scrap steel, the surface is much rusty. The molten liquid metal has more impurities, and the effective technical measures for the impurities are as follows: after the liquid metal is poured into the pouring ladle, the liquid metal needs to be kept still to float impurities, and a filter screen is placed at the tail end of the transverse pouring gate. The method affects foam gasification, has lower impurity cleaning degree, and sometimes has large particle impurities on the surface of the casting.

The application of the bottom leakage zigzag closed slag blocking casting system in the lost foam process fully reduces impurities in liquid metal, is beneficial to improving the utilization rate of the liquid metal, improving the casting quality, reasonably distributing a thermal field and fully gasifying a foam model, reduces the rejection rate, improves the qualification rate and the economic benefit, and reduces the labor and time cost. Therefore, the process is a low-cost and high-efficiency impurity removing method, and is an urgent need for reducing liquid metal impurities in the lost foam process at present.

Disclosure of Invention

The technical problem to be solved by the utility model is to solve the problems in the background technology.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a be used for closed lost foam casting system auxiliary device, includes the pouring cup, the one end of pouring cup bottom is connected with first end saw tooth that leaks, the runner nest import is connected to the one end of first end saw tooth that leaks, runner nest access connection runner nest export, runner nest exit linkage second end saw tooth that leaks, the one end of second end saw tooth that leaks communicates the cross gate, the pouring department is connected to the one end of cross gate, is provided with the filter screen on the cross gate.

The tops of the first bottom-leakage saw teeth and the second bottom-leakage saw teeth are saw-tooth-shaped.

Compared with the prior art, the utility model has the following beneficial effects:

the full-flow state of the pouring process of the liquid metal is always kept, the liquid metal is accelerated to be rushed up to the first bottom leakage saw tooth through the R15 ramp after entering the sprue cup 1, the liquid metal is under the action of gravity, the impurity floats upwards to block a part of slag, the liquid metal obtains the force of secondary floating to the second bottom leakage saw tooth again through the buffer bag to continuously block the slag, the task of cleaning the impurity is completed after the slag is blocked twice, and the impurities are removed from the cross runner sprue to the casting.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the present utility model.

Figure number and name: the pouring cup 1, the pouring nest inlet 2, the pouring nest outlet 3, the cross runner pouring gate 4, the first bottom-leakage saw teeth 5 and the second bottom-leakage saw teeth 6.

Detailed Description

The present utility model will now be described in detail with reference to the drawings and the specific embodiments thereof, wherein the illustrative embodiments and descriptions of the utility model are for illustration, but not for limitation.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Example 1

As shown in fig. 1, the auxiliary device for the closed lost foam casting system comprises a pouring cup 1, wherein one end of the bottom of the pouring cup 1 is connected with a first bottom-leaking sawtooth 5, one end of the first bottom-leaking sawtooth 5 is connected with a pouring nest inlet 2, the pouring nest inlet 2 is connected with a pouring nest outlet 3, the pouring nest outlet 3 is connected with a second bottom-leaking sawtooth 6, one end of the second bottom-leaking sawtooth 6 is communicated with a cross runner gate 4, one end of the cross runner gate 4 is connected with a casting position, and a filter screen is arranged on the cross runner gate 4; the tops of the first bottom-leakage saw teeth 5 and the second bottom-leakage saw teeth 6 are saw-tooth-shaped.

In the production process, the sand box is fully sealed, negative pressure is generated through a vacuum pump, dry sand is hardened to fix the sand mould, a negative pressure sand box is formed, the sand mould is not collapsed, the full flow state of the liquid metal pouring process is always kept, under the fully sealed negative pressure state, liquid metal is poured into and poured into a sprue cup 1 to enter a sprue and then is upwards flushed to a first bottom leakage saw tooth 5 through an R15 ramp, the liquid metal is under the action of gravity, impurities float up to remove a part of slag, then the liquid metal reaches a sprue pit through 2 to obtain a secondary floating force from a 3 port to a second bottom leakage saw tooth 6 to continuously block slag, the task of cleaning the impurities is completed after the slag blocking is carried out twice, and castings are poured from a cross sprue 4. The size of the pouring gate is reduced, so that impurities in the liquid metal are better filtered.

The foregoing has outlined the detailed description of the embodiments of the present utility model, and the detailed description of the embodiments and the embodiments of the present utility model has been provided herein by way of illustration of specific examples, which are intended to be merely illustrative of the principles of the embodiments of the present utility model.

Claims

1. Be used for closed lost foam casting system auxiliary device, including pouring basin (1), its characterized in that: the pouring cup is characterized in that one end of the bottom of the pouring cup (1) is connected with a first bottom-leaking sawtooth (5), one end of the first bottom-leaking sawtooth (5) is connected with a pouring nest inlet (2), the pouring nest inlet (2) is connected with a pouring nest outlet (3), the pouring nest outlet (3) is connected with a second bottom-leaking sawtooth (6), one end of the second bottom-leaking sawtooth (6) is communicated with a cross runner gate (4), one end of the cross runner gate (4) is connected with a pouring place, and a filter screen is arranged on the cross runner gate (4).

2. The auxiliary device for a closed lost foam casting system according to claim 1, wherein: the tops of the first bottom-leakage saw teeth (5) and the second bottom-leakage saw teeth (6) are saw-tooth-shaped.