CN107774916A - 一种用树脂砂制型芯的铸造工艺方法 - Google Patents

一种用树脂砂制型芯的铸造工艺方法 Download PDF

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Publication number
CN107774916A
CN107774916A CN201610738939.7A CN201610738939A CN107774916A CN 107774916 A CN107774916 A CN 107774916A CN 201610738939 A CN201610738939 A CN 201610738939A CN 107774916 A CN107774916 A CN 107774916A
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China
Prior art keywords
core
sand
triethylamine
molding
casting
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Pending
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CN201610738939.7A
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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 CN201610738939.7A priority Critical patent/CN107774916A/zh
Publication of CN107774916A publication Critical patent/CN107774916A/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
    • 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
    • B22C1/2233—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 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • B22C1/2233—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 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • B22C1/2273—Polyurethanes; Polyisocyanates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mold Materials And Core Materials (AREA)

Abstract

本发明公开了一种用树脂砂制型芯的铸造工艺方法，包括以下：1)铁水熔化；2)将型砂送入烘干炉内进行烘干，烘干后放入混砂机内，并将酚基树脂、固化剂同时加入到混砂处理机内进行混合，固化剂由酚基聚异氰酸酯和三乙胺组成，酚基树脂的重量为三乙胺的15～25倍，将混合砂放入铸造模型机内，进行造型制芯工序；3)对经过造型制芯后的型芯进行喷涂处理，涂料主要为水基涂料，后在烘干机内进行烘干处理。本发明的固化剂是由酚基聚异氰酸酯和三乙胺组成，制芯工艺中无需外部加热，在三乙胺的催化作用下树脂砂得以迅速固化，提高了生产效率。

Description

一种用树脂砂制型芯的铸造工艺方法
技术领域
本发明属于铸造技术领域，具体涉及一种用树脂砂制型芯的铸造工艺方法。
背景技术
铸造车间造型制芯过程大部分采用呋喃树脂砂工艺，呋喃树脂砂工艺中粘结剂为呋喃树脂，固化剂为对甲苯磺酸，是通过在型砂、砂芯中加入一定量的粘结剂和固化剂并烘干硬化成型的一种造型工艺。但这种工艺需要及时加热，而且固化速度慢。
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，提供一种用树脂砂制型芯的铸造工艺方法，提高固化速度，提高生产效率。
本发明提供的一种用树脂砂制型芯的铸造工艺方法，包括以下步骤：
1)、铁水熔化，将计量好的原料投入工频感应电炉内，加热使之熔化成铁水；
2)、将型砂送入烘干炉内进行烘干，烘干后放入混砂机内，并将酚基树脂、固化剂同时加入到混砂处理机内进行混合，固化剂由酚基聚异氰酸酯和三乙胺组成，酚基树脂的重量为三乙胺的15～25倍，将混合砂放入铸造模型机内，进行造型制芯工序；
3)、对经过造型制芯后的型芯进行喷涂处理，涂料主要为水基涂料，后在烘干机内进行烘干处理；
4)、将铁水注入铸造型芯内浇注，并进行自然冷却，铸件再经落砂处理后，进行抛丸处理、表面清理及切割焊补工作。
本发明提供的一种用树脂砂制型芯的铸造工艺方法，其有益效果在于，制芯工艺中无需外部加热，树脂砂固化迅速，提高生产效率。
具体实施方式
下面结合一个实施例，对本发明提供的一种用树脂砂制型芯的铸造工艺方法进行详细的说明。
实施例
1)、铁水熔化，将计量好的原料投入工频感应电炉内，加热使之熔化成铁水；
2)、将型砂送入烘干炉内进行烘干，烘干后放入混砂机内，并将酚基树脂、 固化剂同时加入到混砂处理机内进行混合，固化剂由酚基聚异氰酸酯和三乙胺组成，酚基树脂的重量为三乙胺的19倍，将混合砂放入铸造模型机内，进行造型制芯工序；
3)、对经过造型制芯后的型芯进行喷涂处理，涂料主要为水基涂料，后在烘干机内进行烘干处理；
4)、将铁水注入铸造型芯内浇注，并进行自然冷却，铸件再经落砂处理后，进行抛丸处理、表面清理及切割焊补工作。

Claims (1)

1.一种用树脂砂制型芯的铸造工艺方法，其特征在于：包括以下步骤：
1)、铁水熔化，将计量好的原料投入工频感应电炉内，加热使之熔化成铁水；
2)、将型砂送入烘干炉内进行烘干，烘干后放入混砂机内，并将酚基树脂、固
化剂同时加入到混砂处理机内进行混合，固化剂由酚基聚异氰酸酯和三乙胺组成，酚基树脂的重量为三乙胺的15～25倍，将混合砂放入铸造模型机内，进行造型制芯工序；
3)、对经过造型制芯后的型芯进行喷涂处理，涂料主要为水基涂料，后在烘干机
内进行烘干处理；
4)、将铁水注入铸造型芯内浇注，并进行自然冷却，铸件再经落砂处理后，进行抛丸处理、表面清理及切割焊补工作。
CN201610738939.7A 2016-08-29 2016-08-29 一种用树脂砂制型芯的铸造工艺方法 Pending CN107774916A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108262451A (zh) * 2018-04-10 2018-07-10 苏州勤堡精密机械有限公司 铸铁件汽车发动机缸体回油道砂芯制造方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108262451A (zh) * 2018-04-10 2018-07-10 苏州勤堡精密机械有限公司 铸铁件汽车发动机缸体回油道砂芯制造方法

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