CN103056300B

CN103056300B - Production process for high-strength sand moulds and cores added with novel chill

Info

Publication number: CN103056300B
Application number: CN201210577043.7A
Authority: CN
Inventors: 万荣华; 杨永乾; 桂建元; 申小莉; 李锋亮; 李建立
Original assignee: Tianrui Group foundry Co Ltd
Current assignee: Tianrui Group foundry Co Ltd
Priority date: 2012-12-27
Filing date: 2012-12-27
Publication date: 2015-06-03
Anticipated expiration: 2032-12-27
Also published as: CN103056300A

Abstract

The present invention relates to a casting process, namely a production process for high-strength sand moulds and cores added with a novel chill, including the steps of producing the chill, molding, core making, drying, etc., and is a good solution to various problems existing in use of the traditional chill.

Description

A kind of manufacture craft being added with the high-strength sand of novel chill

Technical field

The present invention relates to a kind of casting technique, be a kind ofly specifically added with the high-strength sand of novel chill, the manufacture craft of fuse.

Background technology

Casting refers to will for the processing mode of its solidification forming be treated by the liquid but the mold in the near future material of solidification being poured into given shape in room temperature, it is a kind of ancient metal fever processing technology, casting technique comprises material preparation, moulding, coremaking, Metal Melting, cast and the step such as to solidify, conventional chill in casting process, in Foundry Production, chill is to improving the effect of rising head and preventing foundry goods from producing shrinkage cavity, shrinkage porosite, ensure that casting quality plays a part outbalance, the mechanism of action of chill accelerates the cooling velocity of ironcasting part in casting process, ironcasting because its structure need cause various piece wall unevenness even, position cooling velocity in cooling procedure that foundry goods is thicker is slower, the position cooling velocity that wall thickness is thinner is fast, the inequality of this cooling velocity very easily causes foundry goods to produce shrinkage cavity or drawing crack, in order to avoid this phenomenon, the cooling velocity that chill is used for balancing each position of foundry goods is commonly used during casting, traditional casting technique chill material used mostly is blade inserting or some reguline metals, but the poor foundry goods that easily makes of this chill effect cracks, use was had to fall ore in sand form as chill material afterwards, but because the ore in sand form that falls is expensive, and the foundry goods that some shapes are comparatively complicated is difficult to make in use, often bring very large puzzlement to Foundry Production.

Summary of the invention

In order to solve the problems of the technologies described above, the invention provides and a kind ofly be added with the high-strength sand of novel chill, the manufacture craft of fuse, this invention adopts novel chill material, in conjunction with integral casting process, well solves the various puzzlements using traditional chill to exist.

The present invention for solving the problems of the technologies described above adopted technical scheme is: a kind of manufacture craft being added with the high-strength sand of novel chill, and processing step is as follows:

Step one, Foundry sand are a, add the shot being equivalent to roughing sand gross weight 30%-100%, the particle diameter of shot is 0.5-1.3mm, adds the waterglass of roughing sand and shot gross weight 2.5-7% afterwards as adhesive, put into afterwards puddle mixer mix after compound for subsequent use;

Step 2, choose Foundry sand by sand using amount needed for cast casting process, add be equivalent to roughing sand total amount 6%-8% waterglass as adhesive, put into afterwards puddle mixer mix after compound is for subsequent use;

Step 3, get step 2 gained compound and carry out moulding, make core, in moulding, make in the process of core, need the position of placing chill to place the compound of step one gained as chill at sand mold, fuse, for subsequent use after obtaining sand mold, fuse;

Step 4, on step 3 gained sand mold, fuse prick establish air-vent, for subsequent use afterwards;

Step 5, get step 4 gained sand mold, fuse, pass into carbon dioxide in the air-vent that Xiang Zhashe is good and carry out drying process, passing into carbon dioxide gas temperature is 5-40 DEG C, and duration of ventilation is 5-30s, after all passages all complete ventilation sclerosis, namely complete this technique.

Beneficial effect:

1. a kind of novel chill being added with the high-strength sand of novel chill, the manufacture craft employing foundry sands of fuse and shot and being mixed of the present invention, compared with traditional casting technique, the present invention makes full use of shot and the excellent thermal diffusivity of roughing sand mixture, in conjunction with integral casting process, effectively can control the cooling velocity of foundry goods thicker position, avoid foundry goods uneven due to cooling velocity and the technical problem such as crackle, shrinkage porosite caused;

2. the present invention a kind of be added with novel chill high-strength sand, fuse manufacture craft easy to implement, compared with traditional casting technique, novel chill used in the present invention more easily makes, and it is easy to use, can in conjunction with the manufacturing process of sand mold, fuse during casting, moulding, make core time place novel chill used in the present invention according to casting section thickness, can effectively avoid chill in traditional handicraft to place the problem of difficulty;

3. a kind of high-strength sand of novel chill, manufacture craft of fuse of being added with of the present invention is compared with traditional casting technique, the present invention adopts novel chill and has higher intensity in conjunction with the sand mold obtained by integrated artistic, fuse, when making to cast, sand mold, fuse do not need stud can keep original type body, simplify conventional casting techniques step, improve casting production efficiency;

4. the present invention a kind of be added with novel chill high-strength sand, fuse low cost of manufacturing process, easy to implement, be applicable to promoting.

Detailed description of the invention

Lower mask body sets forth the specific embodiment of the present invention: be a kind ofly added with the high-strength sand of novel chill, the manufacture craft of fuse, and processing step is as follows:

Step 4, on step 3 gained sand mold, fuse prick establish gas hole, described gas hole is the blind hole extending to sand mold inside from sand mold outer surface, for subsequent use afterwards;

The present invention's foundry sands used is high grade quartz sand, institute's use shot particle diameter is 0.5-1.3mm, can directly commercially purchase, the waterglass of corresponding proportion is added after roughing sand mixes with shot, use as novel chill after mixing, in moulding, when making core, can need to place novel chill according to the corresponding site of casting sand mold, when adding chill, can according to the shape needs of foundry goods, after relevant position adds a certain amount of sand, required chill amount is added according to the volume of foundry goods corresponding site, Deng moulding, make after core process completes, chill becomes sand mold immediately, a part for fuse, based on this sand mold, the bulk strength of fuse is improved, and chill and sand mold, the combination of fuse is more tight, while eliminating stud, also the placement of chill is made to become simple,

Moulding, make again sand mold to be pricked after core terminates and establish air-vent, the bundle of air-vent is established and is arranged according to need of production, and the degree of depth of air-vent, pore size and position distribution are in industry all without that fix and unified standard, and this belongs to known in industry, be under the jurisdiction of prior art, repeat no more;

The dry run of sand mold, fuse adopts carbon dioxide seasoning, in the air-vent utilizing carbon dioxide generation device to be passed into by gas by breather pipe on sand mold, fuse, passing into carbon dioxide gas temperature is 5-40 DEG C, time is 5-30s, wherein the time that passes into of gas also can determine according to site operation personnel's experience, concrete determination methods is artificial hand-held nail, until firmly prick sand mold, core surface, when pricking motionless, namely the hardening strength of sand mold, fuse reaches requirement, complete in steps after sand mold, fuse namely can be used for cast.

Embodiment one,

Be added with the high-strength sand of novel chill, a manufacture craft for fuse, processing step is as follows:

Step one, Foundry sand are a, and add the shot being equivalent to roughing sand gross weight 30%, the particle diameter of shot is 0.5mm, adds the waterglass of roughing sand and shot gross weight 7% afterwards as adhesive, put into afterwards puddle mixer mix after must compound for subsequent use;

Step 2, choose Foundry sand by sand using amount needed for cast casting process, add be equivalent to roughing sand total amount 6% waterglass as adhesive, put into afterwards puddle mixer mix after compound is for subsequent use;

Step 5, get step 4 gained sand mold, fuse, pass into carbon dioxide in the air-vent that Xiang Zhashe is good and carry out drying process, passing into carbon dioxide gas temperature is 5 DEG C, and duration of ventilation is 5s, after all passages all complete ventilation sclerosis, namely completing this technique.

Embodiment two,

Be added with the high-strength sand of novel chill, a manufacture craft for fuse, it is characterized in that: processing step is as follows:

Step one, Foundry sand are a, and add the shot being equivalent to roughing sand gross weight 70%, the particle diameter of shot is 0.9mm, adds the waterglass of roughing sand and shot gross weight 5% afterwards as adhesive, put into afterwards puddle mixer mix after must compound for subsequent use;

Step 2, choose Foundry sand by sand using amount needed for cast casting process, add be equivalent to roughing sand total amount 7% waterglass as adhesive, put into afterwards puddle mixer mix after compound is for subsequent use;

Step 5, get step 4 gained sand mold, fuse, pass into carbon dioxide in the air-vent that Xiang Zhashe is good and carry out drying process, passing into carbon dioxide gas temperature is 25 DEG C, and duration of ventilation is 20s, after all passages all complete ventilation sclerosis, namely complete this technique.

Embodiment three,

Step one, Foundry sand are a, and add the shot being equivalent to roughing sand gross weight 100%, the particle diameter of shot is 1.3mm, adds the waterglass of roughing sand and shot gross weight 2.5% afterwards as adhesive, put into afterwards puddle mixer mix after must compound for subsequent use;

Step 2, choose Foundry sand by sand using amount needed for cast casting process, add be equivalent to roughing sand total amount 8% waterglass as adhesive, put into afterwards puddle mixer mix after compound is for subsequent use;

Step 5, get step 4 gained sand mold, fuse, pass into carbon dioxide in the air-vent that Xiang Zhashe is good and carry out drying process, passing into carbon dioxide gas temperature is 40 DEG C, and duration of ventilation is 30s, after all passages all complete ventilation sclerosis, namely complete this technique.

Claims

1. be added with the high-strength sand of novel chill, a manufacture craft for fuse, it is characterized in that: processing step is as follows:

Step one, choose Foundry sand, add the shot being equivalent to roughing sand gross weight 70%, the particle diameter of shot is 0.5-1.3mm, adds the waterglass of roughing sand and shot gross weight 2.5-7% afterwards as adhesive, put into afterwards puddle mixer mix after compound for subsequent use;

Step 2, choose Foundry sand, add be equivalent to roughing sand gross weight 6%-8% waterglass as adhesive, put into afterwards puddle mixer mix after compound is for subsequent use;