Preventive measures for sand inclusion and sand holes in castings
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- Time of issue:2020-03-13
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(Summary description)Inresinsandmoldingandwaterglasssandmolding,althoughbothofthemoldingstrengthsareveryhigh,sandandsandholesmayalsoappearincastings.Reason:Thesandinthesandmoldisnotcleanandthereisresidualgravel.Inthepouringprocess,themoltenironwashesthemoldingsandonthewallofthesprue.Somemanufacturersusepainttopreventit,andgetbetterresults,buttherewillstillbesandandsandholesinthecasting.Oneisbecauseitismoredifficultanddifficulttoapplypainttothegate.Thesecondisthatthepouringtemperatureishighduringthepouringprocess,andthescouringislarge.Thepaintcaneasilyfalloffunderthescouringandhightemperatureimmersion.Causessandinclusions.Manycastingfactorieshavenotpaidmuchattentiontothesprue.Ignorethescouringofthespruewallduringthepouringprocess.Asaresult,castingscontainsandholes.Method:1.Improvetheyieldofcastings,improvethequalityofcastings,andreducethetotalcostofcastings.2.Acastgateceramictubeisadopted.Thisproductiseasytouse,hasthecharacteristicsofsmoothcirculation,resistancetomolteniron,scouringofmoltensteel,noabsorptionofmoltensteel,andgoodsawability.And,toimprovethelayoutofthepouringsystem,toavoidcastingsandblasting,sandholes,sanddefects.Itplaysagreatroleinimprovingthequalityofcastingsandtheyieldofcastings,especiallyinvariousself-hardeningcastingmoldings.
Preventive measures for sand inclusion and sand holes in castings
Preventive measures for sand inclusion and sand holes in castings
Preventive measures for sand inclusion and sand holes in castings
(Summary description)Inresinsandmoldingandwaterglasssandmolding,althoughbothofthemoldingstrengthsareveryhigh,sandandsandholesmayalsoappearincastings.Reason:Thesandinthesandmoldisnotcleanandthereisresidualgravel.Inthepouringprocess,themoltenironwashesthemoldingsandonthewallofthesprue.Somemanufacturersusepainttopreventit,andgetbetterresults,buttherewillstillbesandandsandholesinthecasting.Oneisbecauseitismoredifficultanddifficulttoapplypainttothegate.Thesecondisthatthepouringtemperatureishighduringthepouringprocess,andthescouringislarge.Thepaintcaneasilyfalloffunderthescouringandhightemperatureimmersion.Causessandinclusions.Manycastingfactorieshavenotpaidmuchattentiontothesprue.Ignorethescouringofthespruewallduringthepouringprocess.Asaresult,castingscontainsandholes.Method:1.Improvetheyieldofcastings,improvethequalityofcastings,andreducethetotalcostofcastings.2.Acastgateceramictubeisadopted.Thisproductiseasytouse,hasthecharacteristicsofsmoothcirculation,resistancetomolteniron,scouringofmoltensteel,noabsorptionofmoltensteel,andgoodsawability.And,toimprovethelayoutofthepouringsystem,toavoidcastingsandblasting,sandholes,sanddefects.Itplaysagreatroleinimprovingthequalityofcastingsandtheyieldofcastings,especiallyinvariousself-hardeningcastingmoldings.
- Categories:news
- Author:
- Origin:
- Time of issue:2020-03-13
- Views:0
In resin sand molding and water glass sand molding, although both of the molding strengths are very high, sand and sand holes may also appear in castings.
Reason: The sand in the sand mold is not clean and there is residual gravel. In the pouring process, the molten iron washes the molding sand on the wall of the sprue.
Some manufacturers use paint to prevent it, and get better results, but there will still be sand and sand holes in the casting. One is because it is more difficult and difficult to apply paint to the gate. The second is that the pouring temperature is high during the pouring process, and the scouring is large. The paint can easily fall off under the scouring and high temperature immersion. Causes sand inclusions. Many casting factories have not paid much attention to the sprue. Ignore the scouring of the sprue wall during the pouring process. As a result, castings contain sand holes.
Method:
1. Improve the yield of castings, improve the quality of castings, and reduce the total cost of castings.
2. A cast gate ceramic tube is adopted. This product is easy to use, has the characteristics of smooth circulation, resistance to molten iron, scouring of molten steel, no absorption of molten steel, and good sawability. And, to improve the layout of the pouring system, to avoid casting sand blasting, sand holes, sand defects. It plays a great role in improving the quality of castings and the yield of castings, especially in various self-hardening casting moldings.
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