EP0005712A2 - Procédé de fabrication de modèles de fonderie et modèle obtenu suivant ce procédé - Google Patents

Procédé de fabrication de modèles de fonderie et modèle obtenu suivant ce procédé Download PDF

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Publication number
EP0005712A2
EP0005712A2 EP79101005A EP79101005A EP0005712A2 EP 0005712 A2 EP0005712 A2 EP 0005712A2 EP 79101005 A EP79101005 A EP 79101005A EP 79101005 A EP79101005 A EP 79101005A EP 0005712 A2 EP0005712 A2 EP 0005712A2
Authority
EP
European Patent Office
Prior art keywords
metal
coating
metal layer
model
model device
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP79101005A
Other languages
German (de)
English (en)
Other versions
EP0005712A3 (fr
Inventor
Hans-Georg Kallen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kleine Brockhoff GmbH
Original Assignee
KLEINE BROCKHOFF GmbH
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 KLEINE BROCKHOFF GmbH filed Critical KLEINE BROCKHOFF GmbH
Publication of EP0005712A2 publication Critical patent/EP0005712A2/fr
Publication of EP0005712A3 publication Critical patent/EP0005712A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes

Definitions

  • Model equipment required in foundries such as models, model plates and core boxes, such as those used for the production of sand molds and sand cores for the sand casting process, are made from wood, plaster, stone mass, plastic or metal, depending on the number of intended impressions.
  • the model devices made of metal have the longest lifespan, i.e. they allow a very large number of impressions, but they are very high in manufacturing costs.
  • the much cheaper model equipment made of stone mass or plastic only allows a significantly smaller number of shapes. If a very high number of formations is to be expected, the expensive metal model devices are still used.
  • the aim of the invention is a cost-effective method for the production of mechanical devices of great inherent strength and shape retention, with a highly wear-resistant surface, which thus allow a very high number of shapes.
  • a negative mold for the desired model device is produced, the molding surface of which is provided with a thin, porous metal coating by flame spraying, and this coating is then backfilled with a plastic casting resin penetrating into the pores of the metal coating, the plastic material with the connected metal coating after molding the negative form is a model device or part of it.
  • Pores of the metal coating achieved a good bond between the metal coating and the plastic core is achieved to a particular degree if.
  • for flame spraying metal particles with grain sizes 20 ⁇ and 125 ⁇ are predominantly used between 50 ⁇ and 80 ⁇ , between which capillaries or pores are more suitable Size.
  • Negative forms made of stone masses which can be removed from the original or an auxiliary model, have proven to be particularly suitable for carrying out the method. Molds made of stone masses can be produced very precisely and withstand the stresses of flame spraying.
  • model devices result which, according to the invention, consist of a thin, porous metal layer on the shaping surface and a core of cast resin, the cast resin backfilling the metal layer and connecting the metal layer and cast resin core filling the pores of the metal layer.
  • the metal layer of the model device has a thickness of 0.2 mm to 0.5 mm.
  • the metal layer consists of metal particles sintered by flame spraying in grain sizes between 20 ⁇ and 125 ⁇ , in the majority between 50 ⁇ and 80 ⁇ , with capillaries between the welded metal particles.
  • a highly wear-resistant metal layer e.g. made of hard metal or chrome nickel steel.
  • FIG. 1 shows the shape consisting of the upper part 1 and the lower part 2 for a casting, for example a relief plate 3.
  • the model plate used for molding the upper part 1 is shown in FIG. It consists of a core 4, the shaping surface of which is formed by a metal layer 5.
  • the model plate shown in FIG. 3 consists of a core 6, the shaping surface of which is formed by a metal layer 7. This mold plate is used for molding the lower mold part 2.
  • the cores 4 and 6 of the model plates are made of cast resin.
  • the metal layers 5 and 7 are porous and consist of wear-resistant, corrosion-resistant metal. A metal layer made of chromium-nickel steel is particularly suitable.
  • the bond between the cores 4 and 6 with the metal layers 5 and 7 is given by the fact that the casting resin forming the cores 4 and 6 penetrates into the pores of the metal layers 5 and 7.
  • the preparation of the pattern plates is the example of the model panel shown in Figure 2 to the upper mold component b en described.
  • a negative mold 8 which consists of plaster, cement or other stone masses, is molded from the original or from an auxiliary model. If necessary, the surface of the negative mold 8 is coated with a size. Graphite is particularly suitable as a size. It is used to dust the negative form and excess graphite is then removed. Now the shaping surface is provided by flame spraying with a layer of metal which forms the subsequent coating 5. For this purpose, metal particles or metal powder in grain sizes between 20 ⁇ and 125 ⁇ , the majority between 50 ⁇ and 80 are used. The thickness of the metal layer is in particular between 0.2 mm and 0.5 mm. The metal layer must be applied in such a way that it remains porous.
  • a frame 9 is placed around the negative mold and the mold cavity and the space enclosed by the frame 9 are backfilled or filled with liquid casting resin.
  • Cold or warm curing resin can be used.
  • the casting resin then forms the core 4 of the model plate and at the same time penetrates into the pores in the metal layer and thus creates a firm connection between the core 4 and the metal layer 5.
  • the model plate is plastered and adapted to the shape to be used and is then ready for use.
  • the metal becomes a flame syringes are used in a suitable particle size so that pores remain in the metal layer which allow the casting resin to penetrate into the metal layer and allow the casting resin to penetrate the metal layer.
  • Metal particles with grain sizes between 20 ⁇ and 125 ⁇ are preferred, the majority between 50 ⁇ and 80 ⁇ .
  • a reinforcing body can be cast into the core in order to save cheaper filling material and / or to stiffen the model device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Coating By Spraying Or Casting (AREA)
EP79101005A 1978-04-03 1979-04-03 Procédé de fabrication de modèles de fonderie et modèle obtenu suivant ce procédé Withdrawn EP0005712A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19782814352 DE2814352A1 (de) 1978-04-03 1978-04-03 Verfahren zur herstellung von und nach diesem verfahren hergestellte modelleinrichtungen
DE2814352 1978-04-03

Publications (2)

Publication Number Publication Date
EP0005712A2 true EP0005712A2 (fr) 1979-12-12
EP0005712A3 EP0005712A3 (fr) 1980-01-23

Family

ID=6036062

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79101005A Withdrawn EP0005712A3 (fr) 1978-04-03 1979-04-03 Procédé de fabrication de modèles de fonderie et modèle obtenu suivant ce procédé

Country Status (3)

Country Link
EP (1) EP0005712A3 (fr)
DE (1) DE2814352A1 (fr)
ES (1) ES479188A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143758A (en) * 1983-06-23 1985-02-20 Fischer Ag Georg Detecting wear in foundry patterns or core boxes
DE19515038C2 (de) * 1994-05-17 2002-05-29 Seat Sa Verfahren zur Herstellung eines Referenzmodells für Oberflächen
CN102950243A (zh) * 2011-08-29 2013-03-06 广西玉柴机器股份有限公司 砂型铸造模具及该模具的制作方法
CN103752766A (zh) * 2014-02-13 2014-04-30 山东理工大学 一种树脂铸造模具的快速制造方法
CN104624951A (zh) * 2015-02-06 2015-05-20 陕西柴油机重工有限公司 一种复杂空间铸造模具的制作方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3831192A1 (de) * 1988-09-14 1990-03-22 Hek Gmbh Verfahren zum herstellen von formen und formschalen, giessereimodellen, kernbuchsen und dergleichen, mit strukturierter oberflaeche

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR676242A (fr) * 1928-06-06 1930-02-20 Budd Edward G Mfg Co Perfectionnements aux matrices et procédé de fabrication de ces matrices
DE712915C (de) * 1939-01-05 1941-10-28 Siemens Schuckertwerke Akt Ges Verfahren zur Herstellung von Formplatten, Modellen u. dgl. fuer Giesereizwecke
GB646223A (en) * 1948-01-31 1950-11-15 Polygram Casting Company Ltd Improvements in or relating to the production of patterns from metals
FR1005711A (fr) * 1947-09-10 1952-04-15 Procédé de fabrication d'outils de moulage pour fonderies
DE888602C (de) * 1948-10-02 1953-09-03 Wmf Wuerttemberg Metallwaren Verfahren zur Herstellung von Dauerformen oder Modelleinrichtungen
CH428107A (de) * 1965-01-07 1967-01-15 Sulzer Ag Verfahren zum Herstellen von Formkörpern zum mittelbaren oder unmittelbaren Erzeugen von den formgebenden Hohlraum einer Giessform begrenzenden Wänden oder Wandteilen
FR1524951A (fr) * 1960-01-14 1968-05-17 Procédé de fabrication d'outillages de fonderie et outillages ainsi obtenus
GB1184095A (en) * 1967-03-07 1970-03-11 Chelton Forming Ltd Improvements in or relating to the Manufacture of Core-Boxes for Foundry Work

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR676242A (fr) * 1928-06-06 1930-02-20 Budd Edward G Mfg Co Perfectionnements aux matrices et procédé de fabrication de ces matrices
DE712915C (de) * 1939-01-05 1941-10-28 Siemens Schuckertwerke Akt Ges Verfahren zur Herstellung von Formplatten, Modellen u. dgl. fuer Giesereizwecke
FR1005711A (fr) * 1947-09-10 1952-04-15 Procédé de fabrication d'outils de moulage pour fonderies
GB646223A (en) * 1948-01-31 1950-11-15 Polygram Casting Company Ltd Improvements in or relating to the production of patterns from metals
DE888602C (de) * 1948-10-02 1953-09-03 Wmf Wuerttemberg Metallwaren Verfahren zur Herstellung von Dauerformen oder Modelleinrichtungen
FR1524951A (fr) * 1960-01-14 1968-05-17 Procédé de fabrication d'outillages de fonderie et outillages ainsi obtenus
CH428107A (de) * 1965-01-07 1967-01-15 Sulzer Ag Verfahren zum Herstellen von Formkörpern zum mittelbaren oder unmittelbaren Erzeugen von den formgebenden Hohlraum einer Giessform begrenzenden Wänden oder Wandteilen
GB1184095A (en) * 1967-03-07 1970-03-11 Chelton Forming Ltd Improvements in or relating to the Manufacture of Core-Boxes for Foundry Work

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143758A (en) * 1983-06-23 1985-02-20 Fischer Ag Georg Detecting wear in foundry patterns or core boxes
DE19515038C2 (de) * 1994-05-17 2002-05-29 Seat Sa Verfahren zur Herstellung eines Referenzmodells für Oberflächen
CN102950243A (zh) * 2011-08-29 2013-03-06 广西玉柴机器股份有限公司 砂型铸造模具及该模具的制作方法
CN103752766A (zh) * 2014-02-13 2014-04-30 山东理工大学 一种树脂铸造模具的快速制造方法
CN103752766B (zh) * 2014-02-13 2015-12-30 山东理工大学 一种树脂铸造模具的快速制造方法
CN104624951A (zh) * 2015-02-06 2015-05-20 陕西柴油机重工有限公司 一种复杂空间铸造模具的制作方法

Also Published As

Publication number Publication date
DE2814352A1 (de) 1979-10-04
EP0005712A3 (fr) 1980-01-23
ES479188A1 (es) 1980-08-16

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Inventor name: KALLEN, HANS-GEORG