共查询到18条相似文献,搜索用时 140 毫秒
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一种新型铸造粘结剂——特粘油粘结剂的研制 总被引:2,自引:0,他引:2
本文针对铸造生产使用粘结剂用量大、价格高的特点, 提出了一种新型粘结剂———特粘油粘结剂。该粘结剂系特粘油经稀释、添加强度增强剂后使其粘度降低、粘结力增大而制成。研究表明, 该粘结剂性能优良、价格低廉, 适用于铸造生产。 相似文献
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Coat-Mix工艺法这种新工艺使用的三种主要物质为:石墨粉填料、苯酚甲醛树脂粘结剂和甲醇溶剂(图)。首先把粘结剂倒入溶剂中溶解,然后将填料加入该溶液中使之成为悬浮液,再 相似文献
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本文在对渣油粘结剂研究与应用历程的认识基础上,开发出一种新型改性渣油,即当渣油改性、稀释、再浮化后,“渣乳”粘结力更大、粘度更稀,能进一步提高型芯砂混合料的松散流动性,在一定程度上可代替树脂粘结剂。经生产表明,它是一种价廉,性能优异的新型砂粘结剂。 相似文献
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DY砂芯粘结剂的应用研究 总被引:2,自引:0,他引:2
本文介绍了一种新型粘结剂-DY粘结剂在铸造中的应用,试验了各工艺因素对粘结剂干拉强度的影响。生产应用表明,新材料减轻环境污染,提高铸件质量,并有较好的经济效益,有一定推广应用价值。 相似文献
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详细地阐述了呋喃树脂砂铸钢阀体产生裂纹的原因,解释了呋喃树脂砂和水玻璃砂铸件裂纹形状的区别并提出了防止铸钢阀体裂纹的措施。 相似文献
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Two important factors affecting the performance of sand mold/core generated by 3D printing (3DP) are strength and dimensional accuracy,which are not only closely related to the reactivity of furan resin and the phase transition of silica sand,but also the curing agent system of furan resin.This paper studies the influence of gel time on the strength and dimensional accuracy of a 3DP sand mold/core,taking the furan resin system as an example and using a sand specimen generated by a 3DP inkjet molding machine.The experiment demonstrates that the gel time of 3 to 6 min for the sand mixture suits 3DP core-making most under the experimental condition.However,it should be noted that under the same resin condition,the strength of a no-bake sand mold/core is higher than that of a 3DP sand mold/core.The dimensional accuracy of the sand mold/core does not change significantly when the gel time is less than 15 min.Improving the activity of binder and developing ultra-strong acid with low corrosion shall be an effective way to improve the quality of the mold/core by 3D printing. 相似文献
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分析了呋喃树脂再生砂的灼减量、微粉含量、含氮量、砂温、酸耗值对型砂工艺性能的影响。通过对砂铁比、浇注温度、粘结剂和固化剂用量加以控制,优化型砂性能,减少铸件不良品的产生。 相似文献
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The synthesis of a low cost no-bake furan resin with a high strength was researched in this paper. Through the analysis of main factors influencing the strength of furan resin, an orthogonal experiment was conducted to optimize synthesis of urea-formaldehyde furan resin with 3% nitrogen. The critical factors and their optimal levels were confirmed, and high strength property was obtained. Subsequently, some active substitute materials, including polyols A agent, methyl alcohol, mother liquid of xylitol, polyols B agent and ethanol, were used for partly substitution of furfural alcohol, the main material component of furan resin. A good combination of the substitute materials was determined to achieve a high strength, and the overal proportion of substitute materials to the resin is 20%. In this study, the substitution mechanism on furan resin was also characterized and analyzed by IR. 相似文献
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聚氨酯砂改性工艺研究 总被引:1,自引:0,他引:1
采用红外光谱技术研究了聚氨酯砂的固化反应机理, 通过向聚氨酯砂中加入呋喃树脂砂进行改性处理, 并采用热失重及扫描电子显微分析技术研究了聚氨酯砂的改性机理。结果表明, 聚氨酯砂中加入呋喃树脂砂以后, 由于在高温下树脂膜分解速度下降, 高温强度得到提高。呋喃树脂砂合适加入量为10 % , 改性聚氨酯砂具有良好的综合性能 相似文献