WO2002000370A1 - Technique de fabrication mixte d'un moule ou de noyaux et appareil associe - Google Patents

Technique de fabrication mixte d'un moule ou de noyaux et appareil associe Download PDF

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Publication number
WO2002000370A1
WO2002000370A1 PCT/CN2000/000423 CN0000423W WO0200370A1 WO 2002000370 A1 WO2002000370 A1 WO 2002000370A1 CN 0000423 W CN0000423 W CN 0000423W WO 0200370 A1 WO0200370 A1 WO 0200370A1
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WO
WIPO (PCT)
Prior art keywords
core
layer mixture
surface layer
back layer
mixture
Prior art date
Application number
PCT/CN2000/000423
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English (en)
Chinese (zh)
Inventor
Shengyi Qin
Original Assignee
Shengyi Qin
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.)
Filing date
Publication date
Application filed by Shengyi Qin filed Critical Shengyi Qin
Priority to AU12667/01A priority Critical patent/AU1266701A/en
Publication of WO2002000370A1 publication Critical patent/WO2002000370A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C13/00—Moulding machines for making moulds or cores of particular shapes
    • B22C13/12—Moulding machines for making moulds or cores of particular shapes for cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/23—Compacting by gas pressure or vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/23—Compacting by gas pressure or vacuum
    • B22C15/24—Compacting by gas pressure or vacuum involving blowing devices in which the mould material is supplied in the form of loose particles
    • B22C15/245—Blowing tubes
    • 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

Definitions

  • the invention relates to a composite molding (core) process and device, which is to inject a fine-grained surface layer mixture into the inner cavity of the mold (core) box and a back layer mixture with a coarser grain size than the surface layer mixture, so that the surface The layer mixture is adhered to the surface and hardened with the back layer mixture to form a complete core to improve the speed and accuracy of the molding (core), to adapt to large-scale industrial production, and to improve the accuracy of castings.
  • core composite molding
  • Applying a coating on the surface of the core in casting production is an effective means to prevent metal penetration, sand sticking, and improve the high surface finish of the casting.
  • people use the pouring method, the rain method, the airless spray method and the electrostatic spray method for coating.
  • these methods are done by brushing, spraying or dipping the coating after the mold (core) is made. Because the coating is applied in an unconstrained state, defects such as brush marks, flow, and stacking can be formed on the surface, and the thickness of the coating affects the dimensional accuracy of castings, especially complex and fine castings.
  • This method breaks through the heating hardness of the K-Y method and the precision coating method.
  • the coating can accurately reproduce the surface of the mold.
  • This method can be used to produce general castings and some precision castings that require high surface quality and dimensional accuracy.
  • the above paints are all solvent-based paints, which contain organic solvents or water, which makes the manufacture, storage, and transportation of the paint extremely inconvenient.
  • the coating is completed by brushing, which is inefficient, and Solvent-based coatings need to be dried after coating, which is not suitable for efficient, high-quality mass production. Summary of the invention
  • the purpose of Ming is to overcome the above-mentioned shortcomings of the prior art, to provide a composite molding (core) process and device, improve the efficiency and quality of core making, improve the dimensional accuracy and surface finish of castings, and adapt to large-scale large-scale production.
  • core composite molding
  • the composite molding (core) process of the present invention is to inject a fine-grained surface layer mixture and a back layer mixture with a coarser grain size than the surface layer mixture into the core box, so that the surface layer mixture adheres to the surface and is mixed with the back layer.
  • the material is hardened together to form a complete core.
  • the molding (core) device of the present invention includes a core box, at least one surface layer sanding head and a back layer sanding head, and the surface layer sanding head has a surface layer storage cavity on the surface layer.
  • the back-layer mixture shot head has a back-layer mixture storage cavity, and the two storage chambers can communicate with the inner cavity of the core box.
  • the core-making process of the present invention is simple and efficient, and a core with a dense surface can be obtained without using a solvent-based coating, which meets the requirements of the size and finish of the casting.
  • the method of the present invention is particularly suitable for the core. Large-scale production.
  • the surface layer mixture refers to a mixture of fine particles not containing a solvent (such as water or an organic solvent), which cannot form a coating on the surface of the core by coating.
  • il3 ⁇ 4 a schematic diagram of an embodiment of a device used in the process of the present invention
  • Fig. 2 is a schematic diagram of another embodiment of the apparatus used in the process of the present invention.
  • the composite molding (core) process of the present invention is to inject a fine-grained surface layer mixture and a back layer mixture with a coarser grain size than the surface layer mixture into the core box, so that the surface layer mixture adheres to the surface and is mixed with the back layer.
  • the material is hardened together to form a complete core.
  • the device of the present invention comprises a core box 1, at least one surface layer sanding head 2 and a back layer sanding head 3, and the surface layer sanding head 2 has a surface layer storage cavity,
  • the back-layer mixture shot head 3 has a back-layer mixture storage chamber, and the two storage chambers can communicate with the inner chamber 7 of the core box 1.
  • FIG. 1 shows a structure in which the surface layer shot head 2 and the back layer shot head 3 are integrated, wherein the back layer shot member 3 is located inside the surface layer shot member 2 .
  • both the surface layer mixture and the back layer mixture can be sprayed first.
  • the position shown in the drawing is a state in which the core box is aligned with the shot head and ready for shot shot.
  • Fig. 2 shows a structure of a composition of a surface layer shot blasting head 2 and a back layer shot blasting head 3.
  • the core box 1 is located on the table and can be moved relative to the shot head 2 or 3.
  • Both the shot head 2 and the shot head 3 are connected to a pressure air source (not shown).
  • the fine-grained surface layer mixture is injected into the core box before the back layer mixture, and the back layer mixture is diffused toward the surface of the inner cavity of the core box when the back layer mixture is injected into the back layer mixture, and the back layer is mixed.
  • the material is filled from the middle of the inner cavity of the core box, so that the surface layer mixture is distributed on the surface of the back layer mixture to be hardened.
  • the fine-grained surface layer mixture and the back layer mixture can also be injected into the core box at the same time.
  • the surface layer mixture is injected along the periphery of the inner cavity of the core box, and the back layer mixture is injected along the middle of the inner cavity of the core box. , So that the surface layer mixture is distributed on the surface of the back layer mixture to be hardened.
  • the core box 1 may be a hot core box, and the surface layer mixture and the back layer mixture are coated sand for a hot core box.
  • the surface layer mixture and the back layer mixture may be wet-coated sand.
  • the core box may be a cold core box, and the surface layer mixture and the back layer mixture may be a core sand mixture for a cold core box.
  • the core box may also be a warm core box, and the surface layer mixture and the back 3 ⁇ 4 layer mixture are core sand mixtures for a warm core box.
  • the surface layer mixture and the back layer mixture may have the same or different kinds of aggregates or binders.
  • the back layer mixture is water glass sand, and the surface layer mixture may be a mixture containing a water glass binder, or a mixture containing other binders or no binders.
  • the surface layer mixed material shot head and the back layer mixed material shot head have an integrated structure.
  • the surface layer mixed material shot head and the back layer mixed material shot head are of a split structure.
  • the back layer aggregate can be silica sand, quartz sand, magnesia, zircon sand, chromite sand or a mixture of these sands.
  • the aggregate of the surface layer mixture may also be silica sand, quartz sand, magnesia, zircon sand, chromite sand, or a mixed sand thereof.
  • the back layer aggregate and the surface layer aggregate may be the same or different, depending on the specific requirements of the casting.
  • Wet coated sand can be the material disclosed in CN1033743C, or it can be other forms of coated sand, such as formed by adding silicone oil or organic fat after adding phenolic resin binder in the conventional coated sand manufacturing process. Wet coated sand.
  • the dry coated sand can be a conventional hot box coated sand or a high temperature resistant coated sand.
  • Example 1
  • the core box 1 is a hot core box. Firstly, a fine-grained surface layer mixture 5 is injected into the core box 1, and then a back layer mixture 6 having a coarser grain size than the surface layer mixture is injected to make the surface layer mixture 5 adhere to The surface and the back layer mixture 6 harden to form a complete core.
  • the back layer mixture is a conventional shell-type coated sand
  • the top layer mixture is a conventional fine-grained shell-shaped coated sand.
  • the core box 1 is a hot core box, and the fine particle surface layer mixture 5 and the back layer mixture 6 are simultaneously injected into the core box 1 so that the surface layer mixture 5 adheres to the surface and hardens with the back layer mixture 6
  • the back layer mixture is a conventional shell-shaped coated sand, which is injected from the middle of the inner cavity of the core box, and the surface layer mixture is a conventional fine-grained shell-shaped coated sand, from the inner cavity of the core box Shot around.
  • Example 3 Except that the surface layer mixture uses a mixture that does not contain a binder, the other embodiments are the same as those in Examples 1 and 2.
  • Example 4 Example 4:
  • the core box 1 is a cold core box. Firstly, a fine-grained surface layer mixture 5 is injected into the core box 1, and then a back layer mixture 6 having a coarser grain size than the surface layer mixture is injected to make the surface layer mixture 5 adhere to The surface and the back layer mixture 6 are hardened into a complete core.
  • the back layer mixture and the surface layer mixture are conventional cold hard resin sand mixtures.
  • the back layer mixture is injected into the back layer mixture, the first shot is made.
  • the surface layer mixture diffuses to the surface of the inner cavity of the core box, and the back layer mixture is injected from the middle of the inner cavity of the core box, so that the surface layer mixture is distributed on the surface of the back layer mixture to be hardened.
  • the core box 1 is a cold core box, and the fine particle surface layer mixture 5 and the back layer mixture 6 are simultaneously injected into the core box 1 so that the surface layer mixture 5 adheres to the surface and is hardened together with the back layer mixture 6
  • a complete core in which the back layer mixture and the surface layer mixture are conventional cold hard resin sand mixture.
  • the surface layer mixture is injected from the periphery of the inner cavity of the core box, and the back layer mixture is injected from the inner cavity of the core box. Middle shot.
  • Example 10 Except that the surface layer mixture is a mixture without a binder, it is the same as in Example 8.
  • Example 10 is the same as in Example 8.
  • the core box 1 is a warm core box. First, a fine-grained surface layer mixture 5 is injected into the core box 1, and then a back layer mixture 6 having a coarser grain size than the surface layer mixture is injected, so that the surface layer mixture 5 is attached to The surface and the back layer mixture 6 are hardened into a complete core.
  • the back layer mixture and the surface layer mixture are conventional resin sand mixtures for warm core boxes.
  • Blending The material diffuses to the surface of the inner cavity of the core box, and the back layer mixture is injected from the middle of the inner cavity of the core box, so that the surface layer mixture is distributed on the surface of the back layer mixture to be hardened.
  • the core box 1 is a warm core box, and a fine-grained surface layer mixture 5 and a coarse-grained back layer mixture 6 are simultaneously injected into the core box 1 so that the surface layer mixture 5 is adhered to the surface and the back layer mixture 6— It is hardened into a complete core, where the back layer mixture and the surface layer mixture are conventional resin sand mixtures for warm core boxes.
  • the surface layer mixture is injected from the periphery of the inner cavity of the core box, and the back layer mixture is from the core. The middle of the box cavity is injected.
  • Example 13 Except that the surface layer mixture uses a mixture that does not contain a binder, the others are the same as those in Examples 10 and 11.
  • Example 13 Except that the surface layer mixture uses a mixture that does not contain a binder, the others are the same as those in Examples 10 and 11.
  • Example 13 Example 13:
  • the core box 1 is a cold core box. Firstly, a fine-grained surface layer mixture 5 is injected into the core box 1, and then a back layer mixture 6 having a coarser grain size than the surface layer mixture is injected to make the surface layer mixture 5 adhere to The surface and the back layer mixture 6 are hardened to form a complete core, wherein the back layer mixture and the top layer mixture are water glass sand.
  • the back layer mixture is injected into the back layer mixture
  • the first layer mixture is injected first.
  • the surface of the inner cavity of the core box diffuses, and the back layer mixture is filled in from the middle of the inner cavity of the core box, so that the surface layer mixture is distributed on the surface of the back layer mixture and hardened by blowing CO 2 .
  • Example 15 Except that the surface layer mixture is a mixture without a binder, it is the same as in Example 13.
  • Example 15 is the same as in Example 13.
  • the surface layer mixture and / or the back layer mixture are made of silica sand, quartz sand, magnesia, zircon sand, chromite sand, or a mixture of these sands.
  • the core shape is a cylindrical core with a diameter of 100 mm and a height of 90 mm, and the core box is a hot core box.
  • the parting surface and the shot opening are in the middle of the core height.
  • the surface layer mixture is 200 mesh zircon sand coated sand, the binder is phenol resin, the back layer mixture is '50 / 100 mesh silica sand coated sand, and the binder is phenol resin.
  • Core making process the core box Xianxiang ejection face layer material mixture, and then incident on the backing layer mixture, the shooting surface layer and the backing layer mixture Mixture interval of 30 seconds, the shooting results showed that pressure 0.6Mpa o
  • the surface layer mixture can be evenly distributed and hardened on the surface of the core.
  • the surface layer sandblasting head 2 and the back layer sandblasting head 3 have a split structure, and after the surface layer sandblasting head 2 has shot sand into the core box 1 The back layer mixture shot head 3 is moved to the shot position above the core box 1, and the back layer mixture is injected into the core box.
  • FIG. 2 shows a structure in which the surface layer sanding head 2 and the back layer sanding head 3 are integrated, wherein the back layer sanding head 3 is located inside the surface layer sanding head 2 .
  • both the surface layer mixture and the back layer mixture can be sprayed first.
  • the surface layer and / or back layer mixture can also be injected into the core box from multiple positions or directions simultaneously or at intervals.
  • the shot head can also be moved without the core box moving.

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

Abstract

L'invention concerne une technique de fabrication mixte d'un moule ou de noyaux et l'appareil associé consistant à injecter le mélange de couche de surface sous forme de fines particules avec le mélange de couche postérieure dont la granulométrie est plus grossière. Le mélange de couche adhérant à la surface est ensuite durci avec le mélange de la couche postérieure pour former un moule complet. En comparaison avec les techniques connues à ce jour, l'invention a pour avantage d'augmenter la vitesse et la précision de la fabrication du moule ou des noyaux, d'assurer une production industrielle massive et d'améliorer la précision du moulage.
PCT/CN2000/000423 2000-06-13 2000-11-15 Technique de fabrication mixte d'un moule ou de noyaux et appareil associe WO2002000370A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU12667/01A AU1266701A (en) 2000-06-13 2000-11-15 A process and an apparatus of mold-making or core-making

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN00108083.0 2000-06-13
CNB001080830A CN1175948C (zh) 2000-06-13 2000-06-13 复合制型、芯工艺和装置

Publications (1)

Publication Number Publication Date
WO2002000370A1 true WO2002000370A1 (fr) 2002-01-03

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ID=4579122

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2000/000423 WO2002000370A1 (fr) 2000-06-13 2000-11-15 Technique de fabrication mixte d'un moule ou de noyaux et appareil associe

Country Status (3)

Country Link
CN (1) CN1175948C (fr)
AU (1) AU1266701A (fr)
WO (1) WO2002000370A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108176826A (zh) * 2018-02-09 2018-06-19 济南标美精密机械有限公司 冒口双工位湿态成型机及制造冒口的工艺
CN112676539A (zh) * 2020-12-31 2021-04-20 江苏文灿压铸有限公司 新能源汽车电机壳水道加工工艺
CN114850411A (zh) * 2021-02-05 2022-08-05 河南省西峡县天马汽车制泵有限责任公司 一种车桥差速器壳体砂芯制造工艺

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EP1897633B1 (fr) * 2005-06-15 2011-08-17 Sintokogio, Ltd. Procédé de contrôle de mélange moussant
CN101982255B (zh) * 2010-10-28 2012-03-21 溧阳市科华机械制造有限公司 具有气控活动挡砂盖板的射砂斗
CN103317101B (zh) * 2013-06-20 2015-07-01 重庆长江造型材料（集团）股份有限公司 湿型砂的射砂机构
CN105537528A (zh) * 2015-12-09 2016-05-04 合肥江淮铸造有限责任公司 一种热芯覆膜砂、冷芯砂混合制芯方法
CN109967690B (zh) * 2019-03-27 2020-08-18 烟台通鼎舟汽车零部件有限公司 一种薄壁铝合金铸件重力铸造用覆膜砂及其使用方法
CN110065140A (zh) * 2019-04-26 2019-07-30 张万勇 一种矿物铸件表面加工方法
CN110576149A (zh) * 2019-10-18 2019-12-17 彰武县联信铸造硅砂有限公司 覆膜砂分层次固化复合制型工艺
CN114130962A (zh) * 2021-11-19 2022-03-04 江苏新韦尔新材料有限公司 一种覆膜砂壳型分层喷射成型的方法

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JPS53125929A (en) * 1977-04-11 1978-11-02 Hitachi Metals Ltd Device of charging sand for molding
JPS57139443A (en) * 1981-02-20 1982-08-28 Hitachi Ltd Molding method for mold
JPH0313248A (ja) * 1989-06-12 1991-01-22 Daido Steel Co Ltd 自硬性複合鋳型
JPH03216236A (ja) * 1990-01-22 1991-09-24 Mitsubishi Heavy Ind Ltd アルカリ系フェノール樹脂を用いた無塗型造型法
CN2226501Y (zh) * 1994-11-05 1996-05-08 李忠炎 一种连续混合式喷射造型机
JPH08257678A (ja) * 1995-03-23 1996-10-08 Mitsubishi Heavy Ind Ltd 鋳型の製造方法

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Publication number Priority date Publication date Assignee Title
JPS53125929A (en) * 1977-04-11 1978-11-02 Hitachi Metals Ltd Device of charging sand for molding
JPS57139443A (en) * 1981-02-20 1982-08-28 Hitachi Ltd Molding method for mold
JPH0313248A (ja) * 1989-06-12 1991-01-22 Daido Steel Co Ltd 自硬性複合鋳型
JPH03216236A (ja) * 1990-01-22 1991-09-24 Mitsubishi Heavy Ind Ltd アルカリ系フェノール樹脂を用いた無塗型造型法
CN2226501Y (zh) * 1994-11-05 1996-05-08 李忠炎 一种连续混合式喷射造型机
JPH08257678A (ja) * 1995-03-23 1996-10-08 Mitsubishi Heavy Ind Ltd 鋳型の製造方法

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108176826A (zh) * 2018-02-09 2018-06-19 济南标美精密机械有限公司 冒口双工位湿态成型机及制造冒口的工艺
CN108176826B (zh) * 2018-02-09 2023-06-16 济南标美精密机械有限公司 冒口双工位湿态成型机及制造冒口的工艺
CN112676539A (zh) * 2020-12-31 2021-04-20 江苏文灿压铸有限公司 新能源汽车电机壳水道加工工艺
CN114850411A (zh) * 2021-02-05 2022-08-05 河南省西峡县天马汽车制泵有限责任公司 一种车桥差速器壳体砂芯制造工艺
CN114850411B (zh) * 2021-02-05 2024-03-15 河南省西峡县天马汽车制泵有限责任公司 一种车桥差速器壳体砂芯制造工艺

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Publication number Publication date
CN1275455A (zh) 2000-12-06
AU1266701A (en) 2002-01-08
CN1175948C (zh) 2004-11-17

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