WO2018059208A1 - 铸造用浇道管制备方法 - Google Patents

铸造用浇道管制备方法 Download PDF

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Publication number
WO2018059208A1
WO2018059208A1 PCT/CN2017/100903 CN2017100903W WO2018059208A1 WO 2018059208 A1 WO2018059208 A1 WO 2018059208A1 CN 2017100903 W CN2017100903 W CN 2017100903W WO 2018059208 A1 WO2018059208 A1 WO 2018059208A1
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Prior art keywords
casting
pipe
molding
forming
drying
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PCT/CN2017/100903
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English (en)
French (fr)
Inventor
蒋诚
王晔
马国荣
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常州万兴纸塑有限公司
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Publication of WO2018059208A1 publication Critical patent/WO2018059208A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
    • B22C9/082—Sprues, pouring cups

Definitions

  • the present invention relates to a method of preparing a casting sprue tube.
  • the foundry industry is the basic industry of the machinery industry. Casting plays an important role in the machinery industry. Foundry technology is one of the main technologies for the sustainable development of the national economy, and it is the supply side of mechanical products. According to the data, there are 22,000 foundry enterprises in China in 2001, providing 25 million tons of castings for various sectors of the national economy. As China's manufacturing is well-known abroad, and the mechanical manufacturing industry is booming, casting products with large volume, heavy weight, complex shape and high technical requirements must be filled with high-temperature molten iron by installing sprue tubes to ensure product quality.
  • An object of the present invention is to provide a method for preparing a casting sprue tube which is formed by casting a gate after the hot water is poured, forming a carbide after the high temperature of the sprue tube, and directly recycling the cast gate iron.
  • a method for preparing a casting sprue tube comprising the following steps:
  • ingredients the qualified silicate fiber, reinforcing material and adhesive are added to the mixer in proportion to stir;
  • the evenly mixed composition is added to the water at a concentration of eight thousandths;
  • c molding: the dilution slurry is formed by a molding machine by vacuum suction method; [0009] d, drying: the formed pipe blank wet into the drying chamber, after high temperature circulation hot air drying, evaporation and dehydration to a water content of 55-60%;
  • the main raw material selected by the invention is 60-70% of the silicate fiber, and the reinforcing material accounts for the total amount of 3
  • bonding materials account for 2-5% of the total.
  • the reinforcing material is a phenolic resin.
  • the bonding material is a silane coupling agent.
  • the silicate sprue tube for casting of the present invention is a fiber-based product, and is manufactured into a tubular product of various specifications by a special manufacturing method by a combination of various materials, and has a high temperature resistance.
  • the sprue is installed before the casting.
  • the flow rate and flow direction of the molten iron can be selected.
  • the diameter of the sprue pipe, the diameter, the turning, the three-way and the four-way are selected.
  • the pipe and the pipe fittings used in the sprue are all plugged in.
  • the filling system is firmly supported. No sand leakage.
  • the invention is embedded in the foundry sand, and the molten iron at a high temperature of 1300 degrees or more in an anoxic state smoothly passes through, and the same crucible is carbonized at a high level to form a sintered carbon "carbon ash". It solves many shortcomings of using traditional ceramic sprue tubes, improves the pass rate of castings, increases the quality of castings, reduces the disposal of solid waste, and saves costs for recycling foundry materials and recycled sand.
  • Example 1 The selected silicate fiber accounts for 60%, the phenolic resin is 38%, and the silane coupling agent is 2%. Stir in the mixer until the material is evenly stirred.
  • the uniformly mixed composition is diluted with water at a concentration of eight thousandths; the diluted slurry is formed by a vacuum forming method by a molding machine; the formed wet blank of the pipe is introduced into a drying chamber, dried by a hot air at a high temperature cycle, and evaporated to evaporate to The water content is 55%.
  • the wet blank of the pipe is called the blank after dewatering. After the dewater is dehydrated, it contains the appropriate moisture and shrinkage type. It is manually placed into the mold of the molding machine, and then transferred to the inspection table after high temperature hot pressing.
  • the product strength and stiffness are increased, and the smoothness of the inner wall of the pipe is improved.
  • the pressure of hot pressing is adjusted according to the pressure surface area of the pipe; trimming inspection : Remove the flashing of the pipe fittings and test the product one by one.
  • Example 2 70% of the selected silicate fibers, 35% of the phenolic resin, and 5% of the silane coupling agent. Stir in the mixer until the material is evenly stirred.
  • the uniformly mixed composition is diluted with water at a concentration of eight thousandths; the diluted slurry is formed by a vacuum forming method by a molding machine; the formed wet blank of the pipe is introduced into a drying chamber, dried by a hot air at a high temperature cycle, and evaporated to evaporate to The water content is 60%.
  • the wet billet of the pipe is called the blank after dewatering. After the dewater is dehydrated, it contains the appropriate moisture and shrinkage type. It is manually placed into the mold of the whole machine, and then transferred to the inspection table after high temperature hot pressing.
  • the product strength and stiffness are increased, and the smoothness of the inner wall of the pipe is improved.
  • the pressure of the hot pressing is adjusted according to the pressure surface area of the pipe. Trimming inspection: Remove the flashing of the pipe fittings and test the products one by one.
  • the sprue tube prepared by the invention is pre-buried in the foundry sand, and the sprue tube passes through the high-temperature molten iron at a temperature of 1300 degrees or more in an oxygen-deficient state, and the homogeny is carbonized at a height to form a sintered product "carbon ash". "Carbon" will become powdery as long as it is rubbed. It solves many shortcomings of using traditional ceramic sprue tubes, improves the yield of castings, increases the quality of castings, reduces the disposal of solid waste, and saves costs for recycling foundry materials and recycled sand.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)

Abstract

一种铸造用浇道管制备方法，包括以下步骤：a、配料：将检验合格的硅酸盐纤维、增强材料和粘接剂按照比例加入搅拌机内进行搅拌；b、稀释：搅拌均匀的组合料按千分之八的浓度加入水进行稀释；c、成型：稀释浆由成型机通过真空吸敷法进行成型；d、干燥：成型后的管件湿坯进入干燥室，经高温循环热风干燥后，蒸发脱水至含水率55-60%；e、整形：将干燥处理后的管件毛坯，放入整型机模具，进行高温热压整形；f、修边检验：去除管件的飞边，同时对产品逐件检验。浇道管经铁水浇注后，浇道管形成碳化物，对铸造浇口铁直接回用，铸造砂的回用处理简单。

Description

铸造用浇道管制备方法
技术领域
[0001] 本发明涉及一种铸造用浇道管制备方法。
背景技术
[0002] 铸造业是机械工业的基础产业， 铸造在机械业中占有十分重要的地位， 铸造技 术是国民经济可持续发展的主体技术之一， 是机械产品供给侧。 据资料表明 201 5年我国现有铸造企业 2.2万家， 就为国民经济各部门提供 2500万吨铸件。 隨着中 国制造享誉国外， 促使机械制造业蓬勃发展， 铸造业的铸件体积大、 质量重， 型状复杂， 技术要求高的产品， 必须通过安装浇道管来灌注高温铁水， 才能保 证产品质量。
[0003] 目前， 国内绝大部分的铸造企业都是釆用传统陶瓷耐火材料浇道管， 该产品的 承接方法为对接， 容昜产生漏砂影响铸件产品的品质， 漏砂严重吋使之铸件产 品报废。 在铸件浇注结束后陶瓷浇道管内， 使必留有铁水而冷却后形成浇道铁 棒， 回收利用铁棒吋必须把陶管打碎剥离， 这是一道必做的工序， 花费劳力完 成， 同吋带来了固体垃圾处理成本。 对回收利用铸造用砂带来麻烦。
技术问题
[0004] 本发明的目的在于提供一种铁水浇注后， 浇道管经过高温后形成碳化物， 对铸 造浇口铁直接回用， 铸造沙的回用处理简单的铸造用浇道管制备方法。
问题的解决方案
技术解决方案
[0005] 为了达到上述目的， 本发明的技术方案是： 一种铸造用浇道管制备方法， 包括 一下步骤：
[0006] a、 配料： 将检验合格的的硅酸盐纤维、 增强材料和粘接剂按照比例加入搅拌 机内进行搅拌；
[0007] b、 稀释： 搅拌均匀的组合料按千分之八的浓度加入水进行稀释；
[0008] c、 成型： 稀释浆由成型机通过真空吸敷法进行成型； [0009] d、 干燥： 成型后的管件湿坯进入干燥室， 经高温循环热风干燥后， 蒸发脱水 至含水率 55-60%;
[0010] e、 整形： 将干燥处理后的管件毛坯， 放入整型机模具， 进行高温热压整形； [0011] f、 修边检验： 去除管件的飞边， 同吋对产品逐件捡验。
[0012] 优选的， 本发明选用的主原材料为硅酸盐纤维占 60-70%， 增强材料占总量的 3
0-40% , 粘接材料占总量的 2-5%。
[0013] 优选的， 所述增强材料为酚醛树脂。
[0014] 优选的， 所述粘接材料为硅烷偶联剂。
发明的有益效果
有益效果
[0015] 本发明的铸造用硅酸盐质浇道管是纤维类制品， 通过多种材料的组合， 经特殊 的制造方法， 制造成各种规格管状的制品具有耐高温的特牲， 在浇注铸件前安 装浇道吋， 可根椐铁水流量、 流向需要进行选择浇道管直径、 变径、 转弯、 三 通、 四通， 浇道所用管及管件全部采用插接的方法， 灌注系统承接牢固不漏砂 。 本发明的预埋在铸造沙内， 在缺氧状态下 1300度以上高温铁水顺畅通过， 同 吋在高度状态下自行变质碳化形成烧结物 "碳灰"。 解决了使用传统陶瓷浇道管诸 多缺点， 提高了铸件的合格率， 增加了铸件的品质， 減少了固体废料的处理， 对回收铸造原料和回用砂利用节约了成本。
实施该发明的最佳实施例
本发明的最佳实施方式
[0016] 以下给出实施例对本发明作进一步详细的说明。
[0017] 实施例一： 选用的硅酸盐纤维占 60%， 酚醛树脂 38%， 硅烷偶联剂 2%。 加入 搅拌机内进行搅拌， 直至物料搅拌均匀为宜。 搅拌均匀的组合料按千分之八的 浓度加入水进行稀释； 稀释浆由成型机通过真空吸敷法进行成型； 成型后的管 件湿坯进入干燥室， 经高温循环热风干燥后， 蒸发脱水至含水率 55%。 管件湿坯 经脱水后称之毛坯， 毛坯脱水后含有适当水分同吋收缩变型， 经人工放入整型 机模具， 进行高温热压后转移止捡验台。 毛坯经热压整型后增加了产品强度和 挺度， 提高管件内壁的光洁度。 热压的压力按管件受压表面积调正； 修边检验 ： 去除管件的飞边， 同吋对产品逐件捡验。
[0018] 实施例二： 选用的硅酸盐纤维占 70%， 酚醛树脂 35%， 硅烷偶联剂 5%。 加入 搅拌机内进行搅拌， 直至物料搅拌均匀为宜。 搅拌均匀的组合料按千分之八的 浓度加入水进行稀释； 稀释浆由成型机通过真空吸敷法进行成型； 成型后的管 件湿坯进入干燥室， 经高温循环热风干燥后， 蒸发脱水至含水率 60%。 管件湿坯 经脱水后称之毛坯， 毛坯脱水后含有适当水分同吋收缩变型， 经人工放入整型 机模具， 进行高温热压后转移止捡验台。 毛坯经热压整型后增加了产品强度和 挺度， 提高管件内壁的光洁度。 热压的压力按管件受压表面积调正。 ； 修边检 验： 去除管件的飞边， 同吋对产品逐件捡验。
[0019] 本发明制作的浇道管的预埋在铸造沙内， 浇道管在缺氧状态下 1300度以上高温 铁水顺畅通过， 同吋在高度状态下自行变质碳化形成烧结物"碳灰"， "碳灰 "只要 揉搓就会变成粉末状。 解决了使用传统陶瓷浇道管诸多缺点， 提高了铸件的合 格率， 增加了铸件的品质， 減少了固体废料的处理， 对回收铸造原料和回用砂 利用节约了成本。
[0020] 以上所述的仅是本发明的优选实施方式， 应当指出， 对于本领域的普通技术人 员来说， 在不脱离本发明创造构思的前提下， 还可以做出若干变形和改进， 这 些都属于本发明的保护范围。

Claims

权利要求书
[权利要求 1] 一种铸造用浇道管制备方法， 其特征在于： 包括一下步骤：
a、 配料： 将检验合格的的硅酸盐纤维、 增强材料和粘接剂按照比例 加入搅拌机内进行搅拌；
b、 稀释： 搅拌均匀的组合料按千分之八的浓度加入水进行稀释； c、 成型： 稀释浆由成型机通过真空吸敷法进行成型；
d、 干燥： 成型后的管件湿坯进入干燥室， 经高温循环热风干燥后， 蒸发脱水至含水率 55-60%;
e、 整形： 将干燥处理后的管件毛坯， 放入整型机模具， 进行高温热 压整形；
f、 修边检验： 去除管件的飞边， 同吋对产品逐件捡验。
[权利要求 2] 根据权利要求 1所述的铸造用浇道管制备方法， 其特征在于： 本发明 选用的主原材料为硅酸盐纤维占 60-70%， 增强材料占总量的 30-40% ， 粘接材料占总量的 2-5%。
[权利要求 3] 根据权利要求 1所述的铸造用浇道管制备方法， 其特征在于： 所述增 强材料为酚醛树脂。
[权利要求 4] 根据权利要求 1所述的铸造用浇道管制备方法， 其特征在于： 所述粘 接材料为硅烷偶联剂。
PCT/CN2017/100903 2016-09-30 2017-09-07 铸造用浇道管制备方法 WO2018059208A1 (zh)

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