CN107774871A - 一种抗烧结覆膜砂 - Google Patents

一种抗烧结覆膜砂 Download PDF

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Publication number
CN107774871A
CN107774871A CN201610729027.3A CN201610729027A CN107774871A CN 107774871 A CN107774871 A CN 107774871A CN 201610729027 A CN201610729027 A CN 201610729027A CN 107774871 A CN107774871 A CN 107774871A
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China
Prior art keywords
parts
precoated sand
agent
hydroxide
sand
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Pending
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CN201610729027.3A
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English (en)
Inventor
李玉敏
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Qingdao Tiandi Casting Co Ltd
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Qingdao Tiandi Casting Co Ltd
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Priority to CN201610729027.3A priority Critical patent/CN107774871A/zh
Publication of CN107774871A publication Critical patent/CN107774871A/zh
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
    • B22C1/20—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
    • B22C1/22—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Phenolic Resins Or Amino Resins (AREA)

Abstract

本发明公开了一种抗烧结覆膜砂，原砂100份，酚醛树脂5‑8份，偶联剂0.1‑0.2份，固化剂0.2‑0.45份，抗烧结剂0.3‑0.4份，所述润滑剂0.09‑0.5份。本发明通过偶联剂抗烧结覆膜砂不会影响其强度、酌烧减量和发气量等技术指标。

Description

一种抗烧结覆膜砂
技术领域
本发明属于铸造技术领域，具体涉及一种抗烧结覆膜砂。
背景技术
现有覆膜砂为了避免铸件烧结，加入铬铁矿砂，但是铬铁矿砂的角形系数大，生产铸件的表面光洁度低，而且铬铁矿砂成本高。目前铸造厂家仅仅通过降低浇注温度来预防烧结，但是给铸件带来的问题有冷隔、浇不足等其他缺陷，当前没有一种覆膜砂产品能够兼顾。
发明内容
为了克服现有技术领域存在的上述技术问题，本发明的目的在于，提供一种抗烧结覆膜砂，增加了覆膜砂满足铸铁件到铸钢件的普适性，提高了铸件的出品率，节约铸造企业造型材料的成本。
本发明提供的一种抗烧结覆膜砂，其配方如下：原砂100份，酚醛树脂5-8份，偶联剂0.1-0.2份，固化剂0.2-0.45份，抗烧结剂0.3-0.4份，所述润滑剂0.09-0.5份；抗烧结剂采用粉体氢氧化铝和氢氧化镁的混合物，所述氢氧化铝与氢氧化镁的配比是0.5-2，氢氧化铝与氢氧化镁的配比是3；酚醛树脂还包括改性酚醛树脂，所述改性酚醛树脂是通过以下步骤获得的：将甲醛配制成18-26％的甲醛水溶液，用氢氧化钠调节PH为9-10，加入二硼化铬，在50-80℃条件下反应5-7h，最后加入苯酚，在90-110℃条件下反应3-5h。
本发明提供的一种抗烧结覆膜砂，其有益效果在于：氢氧化铝和氢氧化镁为绿色环保型抗烧结剂，在运输、储存和使用过程中不会对环境和人员产生有害影响；也不会改变覆膜砂原有生产工艺和制芯使用条件；通过偶联剂抗烧结覆膜砂不会影响其强度、酌烧减量等技术指标。
具体实施方式
下面结合一个实施例，对本发明提供的一种抗烧结覆膜砂进行详细的说明。
实施例
一种抗烧结覆膜砂，其配方如下：原砂100份，酚醛树脂8份，偶联剂0.2份，固化剂0.45份，抗烧结剂0.4份，所述润滑剂0.5份；抗烧结剂采用粉体氢氧化铝和氢氧化镁的混合物，所述氢氧化铝与氢氧化镁的配比是0.5，氢氧化铝与氢氧化镁的配比是3；酚醛树脂还包括改性酚醛树脂，所述改性酚醛树脂是通过以下步骤获得的：将甲醛配制成18％的甲醛水溶液，用氢氧化钠调节PH为10，加入二硼化铬，在50℃条件下反应5h，最后加入苯酚，在110℃条件下反应5h。

Claims (1)

1.一种抗烧结覆膜砂，其特征在于：其配方如下：原砂100份，酚醛树脂5-8份，偶联剂0.1-0.2份，固化剂0.2-0.45份，抗烧结剂0.3-0.4份，所述润滑剂0.09-0.5份；抗烧结剂采用粉体氢氧化铝和氢氧化镁的混合物，所述氢氧化铝与氢氧化镁的配比是0.5-2，氢氧化铝与氢氧化镁的配比是3；酚醛树脂还包括改性酚醛树脂，所述改性酚醛树脂是通过以下步骤获得的：将甲醛配制成18-26％的甲醛水溶液，用氢氧化钠调节PH为9-10，加入二硼化铬，在50-80℃条件下反应5-7h，最后加入苯酚，在90-110℃条件下反应3-5h。
CN201610729027.3A 2016-08-26 2016-08-26 一种抗烧结覆膜砂 Pending CN107774871A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610729027.3A CN107774871A (zh) 2016-08-26 2016-08-26 一种抗烧结覆膜砂

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610729027.3A CN107774871A (zh) 2016-08-26 2016-08-26 一种抗烧结覆膜砂

Publications (1)

Publication Number Publication Date
CN107774871A true CN107774871A (zh) 2018-03-09

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CN (1) CN107774871A (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114130944A (zh) * 2021-12-07 2022-03-04 青岛连山铸造有限公司 一种使用新型材料的铸造箱体

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114130944A (zh) * 2021-12-07 2022-03-04 青岛连山铸造有限公司 一种使用新型材料的铸造箱体

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Application publication date: 20180309