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A technology of hardener and mold shell, applied in casting molding equipment, molds, cores, etc., can solve problems such as inability to completely overcome defects, and achieve the effect of shortening production cycle, not easy to delaminate, and increasing penetration speed.
Inactive Publication Date: 2016-02-10
TIANJIN RONGHENG GROUP
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Abstract
Description
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Problems solved by technology
[0007] Although the above-mentioned shell hardening agent uses crystalline aluminum chloride, it also uses ammonium chloride at the same time, so it cannot completely overcome the defects of using ammonium chloride as the shell hardening agent.
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0027] Processing hardener 100kg:
[0028] Take 15 kg of hexahydrate crystalline aluminum chloride, 25 kg of dihydrate flake calcium chloride, 1.5 kg of anhydrous boric acid, 0.15 kg of penetrant and 1 kg of wetting agent.
[0029] Pour 57.35kg of clean water into the stirring tank, add the above-mentioned raw materials one by one under stirring and continue stirring for 30 minutes, then stop the machine, pour it into a large tank through the anticorrosive pump, and use it after 2 hours of melting reaction.
Embodiment 2
[0031] Processing hardener 100kg:
[0032] Take 10 kg of hexahydrate crystalline aluminum chloride, 22 kg of dihydrate flake calcium chloride, 2 kg of anhydrous boric acid, 0.1 kg of penetrant and 2 kg of wetting agent.
[0033] Inject 63.9kg of clean water into the stirring tank, add the above-mentioned raw materials one by one under stirring and continue stirring for 30 minutes, then stop the machine, pour it into a large tank through the anticorrosive pump, and use after 2 hours of melting reaction.
Embodiment 3
[0035] Processing hardener 100kg:
[0036] Take 12 kg of hexahydrate crystalline aluminum chloride, 21 kg of dihydrate flake calcium chloride, 1.75 kg of anhydrous boric acid, 0.125 kg of penetrant and 1.5 kg of wetting agent.
[0037] Pour 63.625kg of clean water into the stirring tank, add the above-mentioned raw materials one by one under stirring and continue stirring for 30 minutes, then stop the machine, pour it into a large tank through the anticorrosive pump, and use it after 2 hours of melting reaction.
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PUM
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Abstract
The invention relates to shuttering hardening agents. The shuttering hardening agents mainly include, by weight, 10-15% of hexahydrate crystallization of aluminum chloride, 22-25% of dihydrate flaky calcium chloride, 1.5-2% of anhydrous boric acid, 0.1-0.15% of permeating agents and the balance clear water. The hexahydrate crystallization of aluminum chloride and the dihydrate flaky calcium chloride serve as the main materials of the hardening agents, so that the defect that the work conditions are seriously worsened as ammonium chloride is used as the main materials of shuttering hardening agents is fundamentally overcome, and the other properties are better than those of the ammonium chloride hardening agents. The shuttering hardening agents have the characteristics of being high in hardening speed, shortening the process and shortening the production period, avoid environmental pollution and obviously improve economic benefits.
Description
Technical field [0001] The invention relates to a mold shell hardener for water glass investment casting. Background technique [0002] The precision casting industry is faced with two challenges: one is the continuous improvement of the quality of castings; the other is the increasingly stringent requirements for environmental protection, clean production and human health. Therefore, a higher level of hardener for precision casting molds is proposed. Claim. [0003] At present, most of the precision casting industry uses water glass as the binder, and ammonium chloride or magnesium chloride or aluminum chloride as the hardener. [0004] Ammonium chloride has severely deteriorated working conditions due to the production of ammonia gas, and the mold shell has poor bonding strength and quality cannot be effectively controlled; the viscosity of magnesium chloride solution is large, which affects the hardening and drying speed, and is easy to produce due to the high content of impuriti...
Claims
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Application Information
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