CN105642834A

CN105642834A - Sand mould casting technology using filter screens instead of washburn cores

Info

Publication number: CN105642834A
Application number: CN201610006457.2A
Authority: CN
Inventors: 王大伟; 张祖临; 潘二焕; 王伟超
Original assignee: Luoyang Zhili New Materials Co Ltd
Current assignee: Luoyang Zhili New Materials Co Ltd
Priority date: 2016-01-06
Filing date: 2016-01-06
Publication date: 2016-06-08

Abstract

The invention relates to a sand mould casting technology using filter screens instead of washburn cores. The sand mould casting technology comprises the following steps: manufacturing an upper sand mould and a lower sand mould of a hammer pattern, and reserving an inner gate position; arranging a filter screen between a riser and the hammer pattern and integrating the filter screen and the hammer pattern; arranging a filter screen at a position close to a pouring cup on a sprue; brushing coating on the upper sand mould and the lower sand mould until sand is not exposed; clamping the upper sand mould and the lower sand mould, arranging clips or fully pressing weights, and blocking a parting surface by using a fire-proof mud strip; and adding a pouring system, smelting pouring liquid, and then pouring. By the sand mould casting technology using the filter screens instead of washburn cores, the riser can be removed easily, sometimes, the riser can drop naturally after a box is opened, so that the labor intensity is reduced, the production efficiency is improved, the riser is broken along the filter screens, misrun is avoided, and reject rate is reduced; and by the filter screen placed at a sprue gate, steel slag can be stopped from entering a casting mould cavity, molten steel is purified, and metallurgical quality is improved, so that the performance of castings is improved.

Description

A kind of drainage screen replaces the sand casting process of cameron core

Technical field

The present invention relates to the minimizing technology of casting field sand-cast rising head, specifically relate to a kind of drainage screen and replace the sand casting process of cameron core.

Background technology

Adopt sand mold to produce the thick and large castings such as tup, generally place cameron core at rising head with foundry goods contact position. When the Circularhole diameter of cameron core is too little, back suction phenomenon easily occur, when diameter is too big, remove feeders is time-consuming requires great effort again; Also easily there is band meat phenomenon when dead head removed by the foundry goods that this process produces, time serious, cause that foundry goods is scrapped; Production efficiency is low, and labor intensity is big.

Because the defect that dead head method exists removed by above-mentioned existing sand-cast, the present inventor is engaged in casting for many years and manufactures and designs and have accumulated more rich production experience, in conjunction with correlation theories knowledge research and innovation, to founding a kind of new sand casting process replacing cameron core with drainage screen, improve the method that dead head removed by existing sand-cast so that it is have more technical advance and produce practicality. Great technical economic benefit and the present invention with practical value is created through repetition test.

Summary of the invention

Present invention is primarily targeted at, existing sand-cast is overcome to remove the defect that dead head method exists, and a kind of new sand casting process replacing cameron core with drainage screen is provided, to be solved technical problem is that making it touch at rising head and tup arranges drainage screen between sample, utilize drainage screen foundry goods and rising head to be separated, make this casting technique have more technical advance and produce practicality.

The object of the invention to solve the technical problems realizes by the following technical solutions. A kind of drainage screen proposed according to the present invention replaces the sand casting process of cameron core, and it comprises the steps of

Step 1, makes mo(u)ld top half and the mo(u)ld bottom half of tup apperance sand mold reserved ingate position;

Step 2, arranges drainage screen between rising head and tup apperance, and makes this drainage screen and tup apperance be integrally forming; On sprue, the position near cup arranges drainage screen;

Step 3, on the tup apperance sand mold of mo(u)ld top half and mo(u)ld bottom half, swabbing is to not revealing sand;

Step 4, to mo(u)ld top half and mo(u)ld bottom half matched moulds, stamps clamp or pressure foot foundary weight, and is blocked by its die joint fire-proof mud bar;

Step 5, places running gate system, after smelting and pouring liquid, pours into a mould.

The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.

Aforesaid a kind of drainage screen replaces the sand casting process of cameron core, wherein said drainage screen, by glass braid squarely grid, and applies refractory ceramics slurry, then sintered and obtain.

Aforesaid a kind of drainage screen replaces the sand casting process of cameron core, the wherein said drainage screen being fixed between rising head and tup apperance, has the effect controlling rising head undesirable root height.

Aforesaid a kind of drainage screen replaces the sand casting process of cameron core, and wherein said rising head undesirable root Altitude control is at 1-4mm.

By technique scheme, the method have the advantages that

Adopting drainage screen to replace the sand casting process of cameron core, it is possible to be removed by rising head easily, rising head of sometimes unpacking can come off by nature, reduces the cleaning work amount of foundry goods, and the earth reduces labor intensity, improves production efficiency; Emit opening's edge filter net sheet to disconnect, without band meat phenomenon, reduce again percent defective; Drainage screen stops slag to enter casting mold die cavity, has purified molten steel, has improve metallurgical quality; Therefore, the serviceability of foundry goods is greatly improved, thus substantially increasing product market share. The present invention has good technical economic benefit.

Detailed description of the invention

For further setting forth that the present invention obtains technological means and effect that predetermined goal of the invention is taked, below in conjunction with preferred embodiment, replace its detailed description of the invention of sand casting process of cameron core, step, feature and effect thereof to what propose according to the present invention with drainage screen, describe in detail as after.

Embodiment 1

A kind of drainage screen of the embodiment of the present invention replaces the sand casting process of cameron core, comprises the steps of

Step 1, makes tup apperance sand mold mo(u)ld top half and mo(u)ld bottom half reserved ingate position.

Step 2, arranges drainage screen between rising head and tup apperance, and makes this drainage screen and tup apperance be integrally forming; On sprue, the position near cup arranges drainage screen. Wherein, described drainage screen, glass braid the square net becoming aperture to be 3mm, apply refractory ceramics slurry, obtain through high temperature sintering. The described drainage screen being fixed between rising head and tup apperance has the effect controlling rising head undesirable root height, and rising head undesirable root is highly controllable is made as 1-2mm for this.

Step 3, mo(u)ld top half and mo(u)ld bottom half swabbing at tup apperance sand mold extremely do not reveal sand;

Step 4, by mo(u)ld top half and mo(u)ld bottom half matched moulds, stamps clamp or pressure foot foundary weight, and is blocked by its die joint fire-proof mud bar;

Embodiment 2

Step 2, arranges drainage screen between rising head and tup apperance, and makes this drainage screen and tup apperance be integrally forming;On sprue, the position near cup arranges drainage screen. Wherein, described drainage screen, glass braid become aperture to be 5mm square net, apply refractory ceramics slurry, obtain through high temperature sintering. The described drainage screen being fixed between rising head and tup apperance has the effect controlling rising head undesirable root height, and this rising head undesirable root height is 2-3mm.

Step 3, does not extremely reveal sand by the mo(u)ld top half of tup apperance sand mold and mo(u)ld bottom half swabbing.

Step 4, by mo(u)ld top half and mo(u)ld bottom half matched moulds, stamps clamp or pressure foot foundary weight, and is blocked by its die joint fire-proof mud bar.

Embodiment 3

Step 2, arranges drainage screen between rising head and tup apperance, and makes this drainage screen and tup apperance be integrally forming; On sprue, the position near cup arranges drainage screen. Wherein, described drainage screen, glass braid become aperture to be 8mm square net, apply refractory ceramics slurry, obtain through high temperature sintering. The described drainage screen being fixed between rising head and tup apperance has the effect controlling rising head undesirable root height, and this rising head undesirable root height is 3-4mm.

The above, it it is only presently preferred embodiments of the present invention, not the present invention is done any pro forma restriction, although the present invention is disclosed above with preferred embodiment, but it is not limited to the present invention, any those skilled in the art, without departing within the scope of technical solution of the present invention, when the technology contents of available the disclosure above makes a little change or is modified to the Equivalent embodiments of equivalent variations, in every case it is the content without departing from technical solution of the present invention, the technical spirit of the foundation present invention is to any simple modification made for any of the above embodiments, equivalent variations and modification, all still fall within the scope of technical solution of the present invention.

Claims

1. the sand casting process replacing cameron core with drainage screen, it is characterised in that comprise the steps of

Step 3, does not extremely reveal sand by tup apperance sand mold mo(u)ld top half and mo(u)ld bottom half swabbing;

2. a kind of drainage screen according to claim 1 replaces the sand casting process of cameron core, it is characterised in that: described drainage screen, by glass braid squarely grid, and apply refractory ceramics slurry, then sintered and obtain.

3. a kind of drainage screen according to claim 1 replaces the sand casting process of cameron core, it is characterised in that: the described drainage screen being fixed between rising head and tup apperance, there is the effect controlling rising head undesirable root height.

4. a kind of drainage screen according to claim 3 replaces the sand casting process of cameron core, it is characterised in that: described rising head undesirable root Altitude control is at 1-4mm.