WO2014101326A1 - Procédé de fabrication d'additif de pulvérisation et de durcissement de sable de moulage - Google Patents

Procédé de fabrication d'additif de pulvérisation et de durcissement de sable de moulage Download PDF

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Publication number
WO2014101326A1
WO2014101326A1 PCT/CN2013/070521 CN2013070521W WO2014101326A1 WO 2014101326 A1 WO2014101326 A1 WO 2014101326A1 CN 2013070521 W CN2013070521 W CN 2013070521W WO 2014101326 A1 WO2014101326 A1 WO 2014101326A1
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WO
WIPO (PCT)
Prior art keywords
molding sand
layer
spray
additive manufacturing
sand
Prior art date
Application number
PCT/CN2013/070521
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English (en)
Chinese (zh)
Inventor
单忠德
刘丰
刘丽敏
战丽
Original Assignee
机械科学研究总院先进制造技术研究中心
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 机械科学研究总院先进制造技术研究中心 filed Critical 机械科学研究总院先进制造技术研究中心
Publication of WO2014101326A1 publication Critical patent/WO2014101326A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y10/00—Processes of additive manufacturing

Definitions

  • the present invention is directed to digital additive manufacturing techniques in the field of rapid manufacturing, and in particular to a method of manufacturing a sandblasted solidification additive.
  • the so-called digital additive manufacturing technology is a new technology of 3D solid rapid freeform manufacturing. It combines the advantages of computer graphics processing, digital information and control, laser technology, electromechanical technology and material technology.
  • Technology originated from the "rapid prototyping" technology that was born in 1988. Rapid prototyping technology uses a new moldless freeforming principle to create 3D solid parts that are shaped using incremental materials. This forming method does not require a mold, eliminating the need for a very lengthy manufacturing process and expensive mold manufacturing costs. It is therefore also known as solid freeform technology or rapid prototyping technology.
  • the mold produced by this method has poor gas permeability, and in most cases, it is difficult to satisfy the principle of sequential solidification or uniform solidification of the casting, and it is difficult to reduce or eliminate the internal stress of the casting, so that cracks, deformations, and shrinkage cavities are generated.
  • the sand sand jet curing additive manufacturing method provided by the invention is based on the advantages of the mold-free molding manufacturing process in the preparation of the mold, and the sand used in the original sand or mixed with the curing agent and the sand in different meshes are also used.
  • the metal material powder for cold iron can be added, and the desired mold can be directly obtained through a reasonable spray curing process.
  • the molds manufactured by this process technology have strong adaptability and good gas permeability, and the casts obtained in the later stage have excellent mechanical properties and performance.
  • SUMMARY OF THE INVENTION The present invention is directed to a method for manufacturing a sand-blasting and curing additive to solve the problem that the existing additive manufacturing technology uses the same material and the same type of molding sand, and the mold manufactured by using the same nozzle is ventilated. It is difficult to reduce or eliminate the internal stress of the casting and the castings may have various casting defects such as cracks, deformation and shrinkage.
  • the molding sand spray curing additive manufacturing method provided by the present invention can also solve the problem that the prior art cannot simultaneously spray the cold iron.
  • the invention provides a molding sand spray curing additive manufacturing method, the main steps thereof comprise:
  • the layered information includes mold structure size information, scan path information, different sand materials, and cold iron material information.
  • a plurality of nozzles may be used to simultaneously spray a raw sand or a molding sand mixed with a curing agent or a molding material of a different mesh number on a same surface, or in the plurality of nozzles.
  • a single nozzle sprays a molding sand separately.
  • the iron powder material can be simultaneously sprayed on each layer having cold iron.
  • a nozzle for spraying a molding sand, a nozzle for spraying an iron powder material, and a nozzle for spraying an adhesive and a curing agent must each have a dedicated head structure. Further, in the above-described spray-cured additive manufacturing method, the injection device must accurately spray the binder and the curing agent on each layer of sand under the control of the control system.
  • moving one layer height is one step thickness of the table or a layer thickness of the head.
  • different injection pressures, injection rates, and different scanning speeds may be employed on the same level.
  • a binder reaction occurs after the binder and the curing agent are sprayed, and the molding sand in the joint place thereof is solidified together, and the sand in other places is still granular dry sand. After curing one layer, bond the next layer until all layers have been bonded.
  • the beneficial effects produced by the technical solution according to the present invention are: obtaining a mold by using the molding sand spray curing additive manufacturing method provided by the present invention, which is a highly integrated flexible manufacturing process, and has a very high spray curing. Efficiency, able to meet the requirements of rapid manufacturing.
  • the mold obtained by this method has good adaptability and good gas permeability, and the cast obtained in the later stage has excellent mechanical properties and performance.
  • Fig. 1 is a process flow diagram of a method of manufacturing a sandblasting curable additive according to the present invention.
  • Figure 2 is a schematic cross-sectional view of the interior of a mold made by the method of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention are described in detail below with reference to the drawings, but the invention may be practiced in various different ways defined and covered by the claims.
  • each spray layer contains one or more sand materials or cold iron materials selected from A, B, C or D, and also includes the distribution of one or more sand materials selected. Area and other information;
  • control information including scanning path, scanning speed, moving direction and speed of the table, ejection material information, and injection pressure and ejection rate;
  • step (5) is repeated before the layer height reaches the D area.
  • the iron powder material for cold iron is precisely sprayed at the same time, and the binder (phenolic resin) and the curing agent are precisely sprayed on each layer of sand by the spraying device;
  • the table moves one layer height in the Z direction. When the layer height exceeds the D area, the coated sand is precisely sprayed on the surface of the cavity in the B and C areas, and the other areas simultaneously spray the ordinary 40 mesh. Sand, the same use of the spray device to accurately spray the binder (phenolic resin) and curing agent on each layer of sand; (8) Each time a layer is sprayed, the table moves one layer height in the Z direction. When the layer height exceeds the surface of the cavity, it reaches the A area, and the ordinary 20 mesh raw sand is sprayed. The same is used to spray the binder (phenolic aldehyde). Resin) and curing agent are precisely sprayed on each layer of sand;

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

Abstract

L'invention porte sur un procédé de fabrication d'additif de pulvérisation et de durcissement de sable de moulage, lequel procédé met en œuvre : la configuration d'un modèle de conception assistée par ordinateur en trois dimensions d'un moule de coulée en fonction d'une structure du moule de coulée, l'obtention de données de profil de section transversale à couches et de trajectoire de balayage à couches en fonction des données de modélisation, l'obtention d'une information de différents matériaux de sable originaux et de différents matériaux de fer froid par analyse, et, finalement, l'obtention d'une information détaillée de surface de couche de chaque couche et la détermination d'une information de commande ; la sélection d'un pulvérisateur en fonction d'une information de surface de couche actuelle et la réalisation d'une pulvérisation précise de matériaux de sable de moulage ou de fer froid avec différents matériaux et différents tamis le long d'une trajectoire de balayage de couche actuelle, tout en utilisant des appareils de pulvérisation pour pulvériser avec précision un agent de liaison et un agent de durcissement sur chaque couche de sable de moulage ; après que la pulvérisation d'une couche est achevée, le déplacement d'une hauteur de couche jusqu'à ce que le moule de coulée requis soit obtenu. Le moule de coulée obtenu selon le procédé a une aptitude à l'auto-adaptation élevée et une bonne perméabilité à l'air, et un moulage obtenu par la suite a de bonnes performances mécaniques et de bonnes performances de service.
PCT/CN2013/070521 2012-12-31 2013-01-16 Procédé de fabrication d'additif de pulvérisation et de durcissement de sable de moulage WO2014101326A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201210588888.6A CN103586410A (zh) 2012-12-31 2012-12-31 一种型砂喷射固化增材制造方法
CN201210588888.6 2012-12-31

Publications (1)

Publication Number Publication Date
WO2014101326A1 true WO2014101326A1 (fr) 2014-07-03

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CN (1) CN103586410A (fr)
WO (1) WO2014101326A1 (fr)

Cited By (1)

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CN113319250A (zh) * 2021-04-27 2021-08-31 江苏宏德特种部件股份有限公司 一种2.8mw风电轮毂的制造方法

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CN103978207B (zh) * 2014-05-14 2015-10-28 陕西科技大学 一种选择性施胶的增材制造方法
CN104308156A (zh) * 2014-11-13 2015-01-28 四川南车共享铸造有限公司 一种3d打印铸造用组合物及其应用
CN104999031A (zh) * 2015-08-12 2015-10-28 宁波高新区多维时空科技有限公司 一种喷射固化型砂的快速制造方法
CN109874320A (zh) * 2015-08-31 2019-06-11 纯净新世界有限公司 用于复合材料的制造的增强的增材制造方法
CN105252002B (zh) * 2015-11-06 2017-03-29 北京理工大学 一种施加持续均匀正压进行金属增材制造的装置与方法
CN105562623B (zh) * 2015-12-31 2017-10-24 华中科技大学 一种水玻璃砂型快速成形方法
CN105665632B (zh) * 2016-01-26 2018-01-05 机械科学研究总院先进制造技术研究中心 一种自适应砂型3d打印成形方法及装置
CN106141096A (zh) * 2016-08-25 2016-11-23 四川南车共享铸造有限公司 一种铁路机车用泵体的铸造方法
CN106799461B (zh) * 2016-12-26 2018-12-07 华中科技大学 一种铸型三维喷印成形方法
CN108656543A (zh) * 2017-03-29 2018-10-16 宁夏共享模具有限公司 用于3d打印设备的多喷头打印头及其打印铸造砂型的方法
CN107321917A (zh) * 2017-07-03 2017-11-07 机械科学研究总院先进制造技术研究中心 一种多材质砂型3d打印成形方法
CN107876696A (zh) * 2017-10-20 2018-04-06 沈阳铸造研究所 3d打印铸造用复合砂型制备方法
CN109774130A (zh) * 2017-11-13 2019-05-21 科华控股股份有限公司 一种3d打印石墨成型冷铁及其制备方法
CN107745072A (zh) * 2017-12-01 2018-03-02 中国铁道科学研究院 用于产品验证的铸件制造方法
CN108672655B (zh) * 2018-04-19 2020-03-17 北京机科国创轻量化科学研究院有限公司 一种铸型温度可控的复合铸造方法
CN115259717A (zh) * 2022-07-26 2022-11-01 共享智能装备有限公司 增材制造用粉煤灰、制备方法及其使用方法
CN116493609B (zh) * 2023-03-10 2023-10-31 南京航空航天大学 组合式砂型增材制造多材料集成铺砂装置及方法

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