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A sand casting and additive technology, which is applied in casting molding equipment, molds, cores, etc., can solve problems such as limited viscosity, and achieve the effects of fast hardening speed, good collapsibility, and low gas generation.
Inactive Publication Date: 2016-06-15
ANHUI SOLID FOUNDRY CO LTD
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Summary
Abstract
Description
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Problems solved by technology
The most widely used molding sand binder is clay. Although clay is cheap and does not produce toxic gas during pouring, its viscosity is limited and it needs to be supplemented with other additives before it can be used.
Method used
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Examples
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Effect test
Embodiment 1
[0014] (1) Add 10 parts of polyethylene wax and 8 parts of linseed gum to 8 parts of paraffin oil, first heat to 60-70 ° C and mix for 15 minutes, then heat to 110-120 ° C and mix for 10 minutes, then add 30 parts of attapulgite Soil and 8 parts of nanometer talcum powder are mixed uniformly to obtain material I;
[0015] (2) Add 6 parts of polyoxyethylene abietic acid and 5 parts of polyacrylamide to 10 parts of waste engine oil, mix them evenly, and treat them with microwaves at a microwave frequency of 2450 MHz and a power of 800 W for 10 minutes, and then add 4 parts of hydroxyl Propyl starch ether and 2 parts of sodium dodecylbenzene sulfonate were mixed evenly, and material II was obtained after standing for 30 minutes;
[0016] (3) Add 2 parts of concentrated nitric acid to material I, and the mixture is ultrasonically treated at an ultrasonic frequency of 40kHz and a power of 50W for 20min, then add material II, 10 parts of chitin, 8 parts of epoxidized soybean oil, 5 ...
Embodiment 2
[0018] (1) Add 15 parts of polyethylene wax and 6 parts of linseed gum to 10 parts of paraffin oil, first heat to 60-70 °C and mix for 15 minutes, then heat to 110-120 °C and mix for 10 minutes, then add 40 parts of attapulgite Soil and 10 parts of nanometer talcum powder are mixed uniformly to obtain material I;
[0019] (2) Add 8 parts of polyoxyethylene abietic acid and 4 parts of polyacrylamide to 15 parts of waste engine oil, mix them evenly, and treat them with microwaves at a microwave frequency of 2450 MHz and a power of 800 W for 10 minutes. After cooling to room temperature naturally, add 3 parts of hydroxyl Propyl starch ether and 4 parts of sodium dodecylbenzenesulfonate were mixed evenly, and material II was obtained after standing for 30 minutes;
[0020] (3) Add 2 parts of concentrated nitric acid to the material I, and the mixture is ultrasonically treated at an ultrasonic frequency of 40kHz and a power of 50W for 20min, then add material II, 12 parts of chitin...
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Abstract
The invention discloses a clay additive for sand casting bonding, which relates to the technical field of sand casting and is prepared from the following raw materials in parts by weight: 30-40 parts of attapulgite, 10-15 parts of waste engine oil, and 10-15 parts of chitin 10-15 parts of polyethylene wax, 7-12 parts of paraffin oil, 6-10 parts of nano talcum powder, 6-10 parts of linseed gum, 6-10 parts of epoxy soybean oil, 5-8 parts of polyethylene glycol , 5-8 parts of polyoxyethylene rosin acid, 3-6 parts of polyacrylamide, 2-4 parts of hydroxypropyl starch ether, 2-4 parts of sodium dodecylbenzenesulfonate, 1-2 parts of sulfur, concentrated 1-2 parts of nitric acid. The addition of the additive of the present invention can effectively improve the performance of the clay, so that the sand mold and the mold core made have a certain strength, and will not be deformed or damaged when the liquid metal is transported, fitted and poured; and the hardening speed is fast and the collapsibility is good. It can be hardened by heating, and the casting is easy to remove sand; the amount of gas generation is small, and no toxic gas will be generated during pouring.
Description
Technical field: [0001] The invention relates to the technical field of sand casting, in particular to a clay additive for bonding sand casting. Background technique: [0002] Sand casting is a casting method that produces castings in sand molds. Steel, iron and most non-ferrous alloy castings can be obtained by sand casting. Because the molding materials used in sand casting are cheap and easy to obtain, the casting mold is easy to manufacture, and it can adapt to the single-piece production, batch production and mass production of castings. It has been the basic process in casting production for a long time. The basic raw materials for making sand molds are foundry sand and sand binder. In order to make the sand mold and core have a certain strength and not be deformed or damaged when handling, fitting and pouring liquid metal, it is generally necessary to add a sand binder to the casting to bond the loose sand grains together to form sand. The most widely used molding s...
Claims
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Application Information
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