三乙胺冷芯盒树脂合成及影响树脂砂性能因素的研究

分类号：TQ320密级：公开

104244 U D C：单位代码：1042

学位论文

三乙胺冷芯盒树脂合成及影响树脂砂性

能因素的研究

伊宁

申请学位级别：硕士学位专业名称：化学工艺

指导教师姓名：黄仁和职称：教授

山东科技大学

二零一一年六月

论文题目：

三乙胺冷芯盒树脂合成及影响树脂砂性能因素

的研究

作者姓名：伊宁入学时间：2008年9月

专业名称：化学工艺研究方向：资源清洁利用技术指导教师：黄仁和职称：教授

论文提交日期：2011年5月

论文答辩日期：2011年6月日

授予学位日期：

RESEARCH ON SYNTHESIS OF RESIN FOR

TRIETHYLAMINE COLD BOX AND THE

SAND’’S

FACTORS S OF RESIN BONDED SAND INFLUENCING FACTOR

PERFORMANCE

A Dissertation submitted in fulfillment of the requirements of the degree of

MASTER OF PHILOSOPHY

from

Shandong University of Science and Technology

b y

Yi Ning

Supervisor:Professor HUANG Ren-he

College of Chemical and Environmental Engineering

Jue2011

声明

本人呈交给山东科技大学的这篇硕士学位论文，除了所列参考文献和世所公认的文献外，全部是本人在导师指导下的研究成果。该论文资料尚没有呈交于其它任何学术机关作鉴定。

硕士生签名：

日期：

AFFIRMATION

I declare that this dissertation,submitted in fulfillment of the requirements for the award of Master of Philosophy in Shandong University of Science and Technology,is wholly my own work unless referenced of acknowledge.The document has not been submitted for qualification at any other academic institute.

Signature:

Date:

摘要

三乙胺冷芯盒制芯法在国内外铸造工艺中已经有着重要地位和很大比重。与传统的铸造技术相比，三乙胺冷芯盒工艺有着诸多优点，例如该法的树脂砂强度较高，气硬化速度快效率高，铸件的表面光洁度和尺寸精度好，环境污染较小，能耗和生产成本相对较低等。因此，三乙胺冷芯盒工艺符合铸造技术未来发展的要求，拥有广阔的前景，尤其是在大批量生产的汽车铸件产业中极具竞争力。

但是，引进国外的技术不能完全适应我国国情；国内三乙胺冷芯盒工艺的自主研发停滞，相关研究资料的匮乏，以及生产原料价格变化的局限，导致该工艺的发展已经无法突破瓶颈。例如，在实际生产，以及笔者的初步实验中，三乙胺冷芯盒工艺存在的问题有：组分Ⅰ苯醚型酚醛树脂的合成反应终点判断较为模糊；冷芯盒法的树脂砂耐热性能不高；两组分中溶剂的种类和比例研究仍属空白；影响树脂砂的可使用时间的众多因素尚需探究；树脂砂在存放时的抗潮性能较差等。因此，在我国，三乙胺冷芯盒工艺需要更加完整和创新性的研究，已解决存在的问题。

本课题对三乙胺冷芯盒工艺存在的问题做了以下研究：①确定合成苯醚型酚醛树脂的较佳工艺条件，尝试利用折光率法监控反应的进行，并得出具有最佳树脂性能的折光率条件；②通过酚醛树脂的改性剂的加入，提高树脂砂普通强度和热强度，并做改性机理方面的研究；③通过单因素试验和正交试验，分析讨论冷芯盒树脂两组分中的溶剂的种类和比例对树脂砂抗拉强度和抗弯强度的影响及其原因；④从催化剂的浓度、溶剂的组成、延缓剂和改性剂等方面考察其对可使用时间影响，延长树脂砂的可使用时间；⑤提高三乙胺法树脂砂的抗潮性能，探究抗潮剂的抗潮机理。通过以上几个方面的研究，使三乙胺冷芯盒工艺生产更清洁，更容易操作；使树脂砂更有强度和韧性，耐热性能和抗潮性能更好，可使用时间更长。并且使三乙胺冷芯盒法的成本较为低廉，符合市场的要求。

关键词：三乙胺冷芯盒；折光率；溶剂；可使用时间；抗潮

ABSTRACT

ISOCURE process has played an important role and occupied a large proportion in the domestic and foreign foundry pares with the traditional casting technique, ISOCURE process has many merits.For example，the intensity of the resin bonded sand is high,and it has high efficiency and hardens speed.The casting’s surface is smooth and size precision is perfect.The pollution of the environment is small,and the energy consumption and the cost are lower relatively.Consequently,it meets the casting technique development requirement,and has the broad prospect,and particularly it will have the competitive power in automobile casting of batch quantity production.

But,the technology which is introduced from foreign country is not able to adapt our national condition completely,and domestic research and development of ISOCURE stagnate. The related research material is deficient and the limitations of price variety of raw material in production,cause the development of ISOCURE process to be unable to break through the bottleneck.For example,in the reality,as well as in author's preliminary experiments, ISOCURE process existed question includes:the end point judgment of the build ing-up reaction of the phenylate phenolics in component one is fuzzier;heat-resisting performance of ISOCURE process'resin bonded sands is not high;the research of the solvents’type and proportion in two components are still blank;the related factors that have effect on the resin bonded sands’bench life should be studied;the moisture resistant performance of the resin bonded sands is bad when they are deposited and so on.Therefore,the ISOCURE process needs more complete and innovative researches and many problems will be resolved.

This subject has done the following researches on the problems of ISOCURE process:①better conditions are determined for the synthesis of phenylate phenolics,and the method of index of refraction is used to monitor the reaction to obtain the index of refraction condition with the best resin performance;②the modifier is joined to enhance the ordinary strength and thermal strength of resin bonded sand,and its mechanism is studied;③single-factor and orthogonal tests were carried out to analyze and discuss the impacts of the kinds and proportion of the solvents on the tensile strength,bending strength of resin bonded sand;

④service life of the resin bonded sand is extended,from the impacts of quantity of catalyst concentration,solvent composition,retardants and modifier;⑤moisture resistance property of the resin bonded sand of triethylamine method is improved,and the mechanism of moisture