CN103817287B

CN103817287B - The Glass tube mould foundry goods manufacturing process that molding sand can be recycled

Info

Publication number: CN103817287B
Application number: CN201410067683.2A
Authority: CN
Inventors: 陆卫平
Original assignee: CHANGSHU WEIHENG MOULD MANUFACTURE Co Ltd
Current assignee: CHANGSHU WEIHENG MOULD MANUFACTURE Co Ltd
Priority date: 2014-02-27
Filing date: 2014-02-27
Publication date: 2016-06-22
Anticipated expiration: 2034-02-27
Also published as: CN103817287A

Abstract

The invention discloses the Glass tube mould foundry goods manufacturing process that a kind of molding sand can be recycled, the Glass tube mould casting dimension of its manufacture is accurate, defect without subcutaneous blowhole, and foundry goods shakes out conveniently after cast, the renewable reuse of old sand, and the breakage rate of regenerating used process medium sand is little, loss is few, and reclaimed sand reclamation rate is high。And this technique dust is few, pollute few, it does not have phenol, formaldehyde。

Description

The Glass tube mould foundry goods manufacturing process that molding sand can be recycled

Technical field

The present invention relates to the Glass tube mould foundry goods manufacturing process that molding sand can be recycled。

Background technology

The material of Glass tube mould is alloy cast iron, and the general substance of foundry goods is about 30kg, four, a type。Using sand mold in the manufacture process of Glass tube mould foundry goods, the molding sand that current Glass tube mould foundry goods sand mold is conventional has clay sand, resin sand and water-glass sand。Adopting clay sand, after cast, the swollen sand of foundry goods is serious, not only wastes molten iron, and adds follow-up amount of machining。Adopting resin sand, can discharge that zest is poisonous, harmful gas during cast, can produce to pollute, and after cast, foundry goods there will be a large amount of subcutaneous blowhole, percent defective raises。Adopting water-glass sand, after cast, foundry goods shakes out difficulty, old sand can not regeneration, cause the sand wasting of resources。

Summary of the invention

It is an object of the invention to provide the Glass tube mould foundry goods manufacturing process that a kind of molding sand can be recycled, the Glass tube mould casting dimension of its manufacture is accurate, defect without subcutaneous blowhole, and foundry goods shakes out conveniently after cast, the renewable reuse of old sand, and the breakage rate of regenerating used process medium sand is little, loss is few, and reclaimed sand reclamation rate is high。And this technique dust is few, pollute few, it does not have phenol, formaldehyde。

For achieving the above object, the technical scheme is that and design the Glass tube mould foundry goods manufacturing process that a kind of molding sand can be recycled, comprise the steps:

1) mulling: put into molding sand in puddle mixer and complex inorganic binder carries out mulling；The input amount of described complex inorganic binder is the 3.5%-4.5% of molding sand quality；Described molding sand is made up of the fresh sand of 0-15% and the reclaimed sand of 85%-100%；

2) moulding: open plain jolter, puts into the molding sand mixed equipped with ram-jolt in the sandbox of casting mould, venting, passes into carbon dioxide and make sand mold harden, make Glass tube mould foundry goods sand mold；Wherein, the pressure carbon dioxide passed into is 0.12-0.2MPa；

3) pour into a mould and solidify；Pouring molten iron after sand mold mould assembling, makes Glass tube mould foundry goods after solidification；

4) vibrating shakeout: make sand mold come off from Glass tube mould foundry goods；

5) breaking, regenerating: make sand mold vibrations broken, make reclaimed sand；

6) boiling cooling: reclaimed sand is carried out boiling cooling, is aided with dust removal of pneumatic separation；

7) by cooling after reclaimed sand put into step 1) in be continuing with。

Preferably, described complex inorganic binder be mainly composed of potassium oxide, sodium oxide, Lithium metasilicate, silicon oxide, aluminium oxide, starch ether and water。

Preferably, described complex inorganic binder is provided by Shenzhen Jing Ding modern science and technology company limited, and described complex inorganic binder is made up of following components in percentage by weight: the water of the potassium oxide of 4%-6%, the sodium oxide of 9%-11%, the Lithium metasilicate of 14%-16%, the silicon oxide of 9%-11%, the aluminium oxide of 4%-6%, the starch ether of 0.5%-1.5% and surplus。

Preferably, described complex inorganic binder is made up of following components in percentage by weight: the potassium oxide of 5%, the sodium oxide of 10%, 15% Lithium metasilicate, 10% silicon oxide, the aluminium oxide of 5%, the starch ether of 1% and surplus water。

Preferably, in vibrating shakeout, broken, mulling step, dust removal of pneumatic separation is carried out。

Preferably, described puddle mixer is continuous muller。

This technique adopts sand lump moulding, and mold thickness is little, can save Modeling Material cost。

Owing to sand mold is shaped to molding after molding sand hardens, gained die cavity is clear-cut, and the dimensional accuracy of foundry goods is high。And sand mold has higher intensity and impact resistance, during cast, sand mold does not need auxiliary chamber, saves workload and cost。

The gas forming amount of this manufacturing process is low, overcomes the foundry goods subcutaneous blowhole defect of phenolic sand molding。

Sand mold collapsibility in present invention process is good, it is easy to the foundry goods that comes off from Glass tube mould foundry goods shakes out conveniently, reduces cleaning work amount。

It is broken that old sand after cast carries out vibrations after vibrating shakeout, magnetic separation, by phase mutual friction at high speed between sand with sand, part remaining binder is made to peel off from sand grains, then sand grains enters vibration boiling cooler, peel off further and stay adhensive membrane, and it is aided with dust removal of pneumatic separation, make adhensive membrane and dust from old sand sur-face peeling remove in time, the reclaimed sand of energy reuse can be obtained。

The breakage rate of present invention process regenerating used process medium sand is little, and loss is few, reclaimed sand reclamation rate high (reclamation rate > 90%), sand using amount significantly reduces, and reclamation of return sand adopts dry back to use, it is not necessary to heating, save sand resource, reduce energy consumption。

It addition, this technique dust is few, pollutes few, it does not have phenol, formaldehyde, the pollution to environment of other molding sand process can be improved。

Accompanying drawing explanation

Fig. 1 is the process chart of the present invention。

Detailed description of the invention

Below in conjunction with drawings and Examples, the specific embodiment of the present invention is further described。Following example are only for clearly illustrating technical scheme, and can not limit the scope of the invention with this。

The technical scheme that the present invention is embodied as is:

As it is shown in figure 1, the Glass tube mould foundry goods manufacturing process that a kind of molding sand can be recycled, comprise the steps:

1) mulling: put into molding sand in continuous muller and complex inorganic binder carries out mulling；The input amount of described complex inorganic binder is the 3.5%-4.5% (being preferably 3.5%, 4% or 4.5%) of molding sand quality；Described molding sand is made up of the fresh sand of 0-15% and the reclaimed sand of 85%-100%；

2) moulding: open plain jolter, puts into the molding sand mixed equipped with ram-jolt in the sandbox of casting mould, venting, passes into carbon dioxide and make sand mold harden, make Glass tube mould foundry goods sand mold；Wherein, the pressure carbon dioxide passed into is 0.12-0.2MPa (being preferably 0.12MPa, 0.16MPa, 0.2MPa)；

7) by cooling after reclaimed sand put into step 1) in be continuing with。

Wherein, in vibrating shakeout, broken, mulling step, dust removal of pneumatic separation is carried out。

A kind of optional proportioning of described complex inorganic binder consists of (percentage by weight): the potassium oxide of 4%, the sodium oxide of 11%, 15% Lithium metasilicate, 11% silicon oxide, the aluminium oxide of 4%, the starch ether of 1% and surplus water。

The another kind of optional proportioning of described complex inorganic binder consists of (percentage by weight): the potassium oxide of 5%, the sodium oxide of 10%, 14% Lithium metasilicate, 9% silicon oxide, the aluminium oxide of 5%, the starch ether of 0.5% and surplus water。

Described complex inorganic binder also has a kind of optional proportioning to consist of (percentage by weight): the potassium oxide of 6%, the sodium oxide of 9%, 16% Lithium metasilicate, 10% silicon oxide, the aluminium oxide of 6%, the starch ether of 1.5% and surplus water。

The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the technology of the present invention principle; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention。

Claims

1. the Glass tube mould foundry goods manufacturing process that molding sand can be recycled, it is characterised in that comprise the steps:

7) by cooling after reclaimed sand put into step 1) in be continuing with；

Described complex inorganic binder is composed of the following components: potassium oxide, sodium oxide, Lithium metasilicate, silicon oxide, aluminium oxide, starch ether and water；

Vibrating shakeout, broken, mulling step carry out dust removal of pneumatic separation；

Described puddle mixer is continuous muller。