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酸催化呋喃树脂自硬砂造型制芯是一种工艺性能较好、使用广泛、经验积累较丰富、技术较成熟的工艺方法。国内推广应用的大都是这种树脂自硬砂。兹将有关原辅材料、硬化特性和硬化速度的控制等问题概述如下。1 原材料选择准备酸催化呋喃树脂砂由树脂粘结剂、催化剂及原砂三部分组成。1.1 呋哺树脂粘结剂呋喃树脂是结构中具有呋喃环的热固性树
Acid catalyzed furan resin self-hardening sand modeling core is a process performance is better, widely used, rich experience, technology is more mature technology. Most domestic promotion and application of this resin is self-hardening sand. We will summarize the issues related to the control of raw and auxiliary materials, hardening characteristics and hardening rates as follows. Preparation of raw materials for acid-catalyzed furan resin sand by the resin binder, the catalyst and the original sand of three parts. 1.1 furosemide resin binder furan resin is the structure of a furan ring thermosetting tree