EP1948374B1 - Dauergiessform und giessformeinsatz - Google Patents

Dauergiessform und giessformeinsatz Download PDF

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Publication number
EP1948374B1
EP1948374B1 EP06792722.8A EP06792722A EP1948374B1 EP 1948374 B1 EP1948374 B1 EP 1948374B1 EP 06792722 A EP06792722 A EP 06792722A EP 1948374 B1 EP1948374 B1 EP 1948374B1
Authority
EP
European Patent Office
Prior art keywords
casting mould
mold
casting
permanent
insert
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.)
Active
Application number
EP06792722.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1948374A1 (de
Inventor
Rolf Dr. Gosch
Peter Dr. Stika
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.)
Nemak Linz GmbH
Original Assignee
Nemak Linz 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 Nemak Linz GmbH filed Critical Nemak Linz GmbH
Priority to SI200631617T priority Critical patent/SI1948374T1/sl
Priority to PL06792722T priority patent/PL1948374T3/pl
Publication of EP1948374A1 publication Critical patent/EP1948374A1/de
Application granted granted Critical
Publication of EP1948374B1 publication Critical patent/EP1948374B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B22C9/061—Materials which make up the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C19/00—Components or accessories for moulding machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B22D17/229—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies with exchangeable die part

Definitions

  • the invention relates to a permanent casting mold for casting castings from a molten metal, in particular a light metal melt, and a mold insert used in such a permanent casting mold.
  • Continuous casting molds of this type also known as "casting molds" in technical terminology, are used, for example, in mass production to cast cylinder heads for internal combustion engines from an aluminum melt.
  • the mold inserts thereby form the combustion chambers in the cylinder heads.
  • mold elements are formed which mold corresponding mold elements in the casting to be cast.
  • Continuous casting molds used in practice today are usually designed in several parts and each comprise at least one mold body, which delimits the mold cavity forming the casting to be produced at least in sections.
  • the mold body is typically made of a highly heat-resistant tool steel, which ensures a sufficiently long life of the mold body despite the high mechanical and thermal loads occurring in the casting operation.
  • casting mold inserts are usually used in the casting mold used for casting this cylinder head whose surface assigned to the mold cavity surrounded by the mold determines the shape of the combustion chamber recesses to be respectively produced in the cylinder head. Mold inserts of this type are also referred to in technical language as "combustion chamber inserts". They sit for this purpose in the molded into the mold cavity walls of the mold body shots.
  • the position of the mold inserts in the respective mold body usually has to be determined empirically first by a plurality of attempts to thermal expansion occurring in the course of the respective casting process by appropriate dimensioning of the mold insert be compensated so that a sufficiently precise casting result is achieved. Is a suitable dimensioning in the context of the available installation space or in view of the function and stability of the respective mold insert is not possible, it may be necessary to reduce the thermal expansion cooling of the mold inserts.
  • an injection molding or pressing tool for processing plastic or other plastic materials known which has at least one surrounding a frame breakthrough frame-shaped mold plate having at least one releasably held in the frame breakthrough mold insert.
  • a mold insert is releasably held on the mold plate, on whose side facing away from the parting plane a change ejector plate package is arranged.
  • the changer ejector plate pack is releasably coupled to a log ejector plate pack, with the changer ejector pack holding mold ejector elements in the mold insert.
  • the coupling element has at least one undercut surface extending transversely to its longitudinal axis, against which a locking bar guided by the trunk ejector plate package rests with at least one counter-locking surface.
  • a method for the production of gray cast iron cylinder heads for valve-controlled internal combustion engines in the sand casting method by which in the area of the later valve seat surface a ledeburitic microstructure can be obtained.
  • the melt introduced into the casting mold in the region of the cylinder-side mouth of the inlet and outlet channels is cooled in controlled manner in the other regions of the casting mold in such a way that the melt solidifies, at least in the region of the later valve seat surfaces with a ledeburitic structure.
  • a cooling element made of steel is arranged in the casting mold.
  • the object of the invention was to provide by simple means a mold insert and a permanent mold, which allow a cost-effective production of castings with respect to the prior art improved production results.
  • a permanent mold for casting castings from a molten metal, in particular a light metal melt, such that a permanent mold at least partially surrounds a mold body which at least partially surrounds a mold cavity forming the casting to be cast and into its wall delimiting the mold cavity a receptacle having a recess which leads into the mold cavity is formed, and has a mold insert seated in the receptacle, which has a top side associated with the mold cavity surrounded by the respective permanent mold, a main body seated with cold play in the receptacle and a support collar which extending over a fraction of the height of the base body of the mold insert and positively seated in the shoulder of the receptacle, wherein the total height of the support collar and base body by an undersize, which is at least equal to the height dimension to the the base body expands in the vertical direction during casting as a result of his entering through the contact with the molten metal heating, is smaller than the depth of the recepta
  • a casting collar protruding from the base body, the height of which is smaller than the height of the casting mold insert, is allocated.
  • the invention is based on the idea to support the mold insert by a suitable structural design in the permanent mold so that it comes with its heating only a minimal change in the position of the mold cavity of the permanent mold associated top of the mold insert.
  • the mold insert on a support collar, and it is formed in its associated receptacle, a correspondingly shaped paragraph, in which the support collar sits at ready mounted permanent mold.
  • the main body of the mold insert is dimensioned so that it is positioned in cold mold with game in its associated recording.
  • the height is sufficient to accommodate the length to the height of the mold insert body at the adjusting itself by the contact heating of the mold insert changes.
  • the expansion associated with the heating of the mold insert is consequently pressed only to a very small extent in the mold cavity surrounded by the mold, while the vast amount of expansion is absorbed by the existing space below the body.
  • the expansions of casting mold and mold insert occurring in the casting operation can be adapted to each other, that despite the fact that the mold insert is exposed to a lower heat dissipation and consequently hotter and therefore expands more than the mold body surrounding the respective casting in the height direction actually occurring expansions of mold and insert are substantially the same or at least as far approached to each other that they differ only within a narrow tolerance range.
  • the base body can easily have such a large volume that the mold elements formed on the mold insert are protected against overheating and the occurrence of excessive thermal stresses in the surface area of the mold is avoided.
  • the invention makes it possible in this way, castings, in which by means of mold inserts in the casting operation recesses are to be formed, with improved accuracy. Particularly good imaging accuracies are achieved when the support collar of the mold insert emanates from the surface associated with the mold cavity of the permanent mold. Thus, in a simple manner, a flush connection of the surface of the mold insert to the Surface of the Kokillen stressess be accomplished, which surrounds the mold insert in each case associated recording.
  • a further advantageous variant of the invention is the production of intake channel core brand inserts in molds for diesel cylinder heads.
  • the position of the essential for the formation of the casting top of the mold insert is according to the invention only depends on how much the support collar in the height direction of the mold insert changes, since only the support collar in the height direction directly on the mold body of the mold is supported.
  • the smaller the height of the support collar the lower the change in position of the upper side of the casting insert that occurs when the casting insert is heated.
  • sufficient material is available in order to form, on the one hand, the mold elements required for the shaping of the casting and, on the other hand, to be able to remove heat from the casting in a targeted manner via a sufficient volume of material.
  • an advantageous embodiment of the invention provides that the height of the support collar is at most 30% of the height of the base body of the mold insert.
  • the goal here is to arrange the Einbaubzugsebene, ie the plane in which the support collar is supported on Kokillenanalysis in closest possible proximity to the free, the mold cavity of the mold directly associated surface of the Kokillen emotionss. Accordingly, it is favorable if the height of the support collar is at most 15% or even at most 10% of the height of the main body of the mold insert.
  • Such a limitation of the height of the support collar can be easily accomplished in practice by the fact that mold insert and support collar hold only the mold insert, without being directly involved in the expression of form elements of the casting to be produced.
  • the accuracy of the positioning of the mold insert in the width direction, ie transversely to its height, can be ensured by the fact that the support collar of the mold insert sits without play in its associated paragraph recording the permanent mold. It can the fit between the support collar and the receptacle are designed so that the mold insert is held securely in the receptacle even when cold on the one hand, but on the other hand can also be easily removed from it.
  • a particularly secure support of the mold insert can be achieved in that the support collar extends around the base body.
  • the invention basically allows to select the material used for the casting mold, regardless of its expansion behavior when heated only after its suitability for molding the respective desired shape elements on the casting . Practical tests have shown, however, that it is favorable, in particular with regard to optimizing the cast structure in the area of the mold element formed on the casting by the mold element, when the mold insert is made of a material whose thermal expansion coefficient is greater than that of the material of the mold body.
  • the coefficient of thermal expansion of the casting insert is 17.0 * 10 -6 m / (m * K) to 18.5 * 10 -6 m / (m * K), in particular 17, 5 * 10 -6 m / (m * K) to 18, 0 * 10 -6 m / (m * K).
  • Particularly suitable materials are Cu, Ni or Bebasêt alloys, it may be advantageous if the mold insert in each case to 90% to 98% of Cu, Ni or Be or on these elements based alloys.
  • a high expansion coefficient of the mold insert proves to be particularly favorable when casting castings from light metal melts.
  • a particularly rapid cooling and concomitantly a particularly fine microstructure can be produced, which has an advantageous effect on the mechanical properties.
  • This possibility of targeted microstructural influence during casting of cylinder heads has a particularly advantageous effect, in which a fine microstructure which is favorable with respect to the continuous loadability can be produced in a simple manner in the region of the combustion chambers with the invention.
  • a further minimization of the shape deviations occurring as a result of the heating during casting can also be achieved by cooling the combustion chamber inserts and / or the mold in a manner known per se, in particular water-cooled.
  • Deformations of the mold insert as a result of stresses occurring during its heating and a hindrance of the expansion of the mold insert in the height direction can also be counteracted thereby, that the undersize of the cross section of the base body relative to the cross section of the receptacle is at least equal to the extent that occurs as a result of the heating of the mold insert in contact with the molten metal in the width direction entering expansion of the body.
  • the material of the mold body may in particular be a steel material, as already successfully used in the prior art for this purpose.
  • the material of the mold according to the invention is chosen so that it has a thermal expansion coefficient between 11 * 10 -6 m / (m * K) and 12 * 10 -6 m / (m * K).
  • a material for the mold body can therefore be used in particular a tool steel, which is characterized by a high hardness and toughness.
  • the Kokillenanalysis 1 serves as a bottom plate of a further not shown, designed as a permanent mold Casting mold, which surrounds a mold cavity H depicting the respective casting.
  • the Kokillenanalysis 1 is like the other Kokillenanalysis the casting mold not shown here made of a heat-resistant tool steel, in the German steel-iron list the material no. 1.2343 and (in% by weight) 0.36-0.42% C, 0.90-1.20% Si, 0.30-0.50% Mn, ⁇ 0.03% P, ⁇ 0.03% S, 4.80-5.50% Cr, 1.10-1.40% Mo, 0.25-0.50% V and the remainder contains iron and unavoidable impurities.
  • This tool steel has a coefficient of thermal expansion of 11.5 * 10 -6 m / (m * K) on average.
  • Cylinder heads for internal combustion engines are cast in the casting mold composed of the base plate mold body 1 together with the other side walls, not shown here, and forming a mold body forming a lid.
  • a number of cylinders of the respective internal combustion engine corresponding number of combustion chambers are formed with valve seats for two intake and two exhaust valves.
  • one of the number of cylinder of the respective internal combustion engine corresponding number of mold inserts 2 are inserted into a respective seat 3 in the mold body 1.
  • Each of the integrally formed mold inserts 2 has a cylindrical base body 2a, which at its the mold cavity H associated side plane in its annular peripheral portion and its central central portion in the direction of the mold cavity H.
  • convex surface 2b bears, projecting from the pairs of the inlet and outlet valve seats forming mold elements 2c, 2d, 2e, 2f.
  • a support collar 2h projecting in the radial direction relative to the peripheral surface 2g of the main body 2a is formed on the base body 2a, which revolves around the base body 2a and its surface 2i assigned to the mold cavity H steplessly adjoins the planar peripheral portion of the surface 2b of the main body 2a is connected.
  • the height hs of the support collar 2h is approximately 22% of the height hg of the base 2a.
  • thread tapped holes 2k In the surface 2b opposite bottom surface 2j of the main body 2a of the mold insert 2 are formed thread tapped holes 2k, in the here not shown expansion screws for fastening the mold insert 2 can be introduced from its receptacle 3.
  • the receptacle 3 is cup-shaped formed in the Kokillenanalysis 1 and has in the region of the mold cavity H associated opening an annular peripheral, in the mold cavity H merging paragraph 3a.
  • the diameter do defined by the inner peripheral surface of the shoulder 3a opening corresponds to the outer diameter of the support collar 2h to a small undersize, so that the support collar 2h is held in cold casting mold with a slight interference fit in paragraph 3a.
  • the depth of the shoulder 3a corresponds to the height hs of the support collar 2h, so that with a cold casting mold the surface 2i of the support collar 2h is aligned flush with the surface 1a of the mold body 1 bounding the receptacle 3.
  • the mold inserts 2 used in the casting mold consist of at least 95% by weight of Cu.
  • the Cu material can, in a known manner, have further constituents which are added to it in order to improve certain properties.
  • the mold inserts 2 made of the thus composed Cu material have on average a thermal expansion coefficient of 18 * 10 -6 m / (m * K).
  • the combustion chamber inserts 2 expand over their height and width when heated significantly stronger than the mold made of steel material 1.2343 mold body 1.
  • the proportion of over the height of the mold insert in the direction of the mold cavity H upon heating entering expansion of the mold insert second which has an effect on the position of the surface 2 b provided with the mold elements 2 c - 2 f, low, since a change in position of the surface 2 b occurs only in proportion to the height h s of the support collar 2 h.
  • the essential part of the expansion in height direction of Mold insert 2 is received by the air space 3b formed below the base 2a in the receptacle 3.
  • the expansion of the basic body 2a in the radial width direction is absorbed by the clearance present in the case of a cold casting mold between the inner peripheral wall of the receptacle 3 and the outer circumferential surface 2g of the basic body 2a. In this way it is ensured that the expansion of the base 2a in the receptacle 3 is not hindered.
  • the height hs can be designed such that the surface 2b with the mold elements 2c-2f of the mold insert 2 remain at the same distance even when the light metal melt poured into the mold cavity H comes into contact is arranged to the surface 1 a of the mold body 1, so that a precise impression of the combustion chamber and the valve seats is ensured in the cylinder head to be generated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
EP06792722.8A 2005-11-16 2006-08-07 Dauergiessform und giessformeinsatz Active EP1948374B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI200631617T SI1948374T1 (sl) 2005-11-16 2006-08-07 Trajni kalup in vloĹľek za kalup
PL06792722T PL1948374T3 (pl) 2005-11-16 2006-08-07 Trwała forma odlewnicza i wkładka formy odlewniczej

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005054616A DE102005054616B3 (de) 2005-11-16 2005-11-16 Dauergießform und Gießformeinsatz
PCT/EP2006/065098 WO2007057238A1 (de) 2005-11-16 2006-08-07 Dauergiessform und giessformeinsatz

Publications (2)

Publication Number Publication Date
EP1948374A1 EP1948374A1 (de) 2008-07-30
EP1948374B1 true EP1948374B1 (de) 2013-04-24

Family

ID=37111722

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06792722.8A Active EP1948374B1 (de) 2005-11-16 2006-08-07 Dauergiessform und giessformeinsatz

Country Status (16)

Country Link
US (1) US7975751B2 (ja)
EP (1) EP1948374B1 (ja)
JP (1) JP5566027B2 (ja)
KR (1) KR101270229B1 (ja)
CN (1) CN101365551B (ja)
AU (1) AU2006314739A1 (ja)
BR (1) BRPI0618566B1 (ja)
CA (1) CA2625622A1 (ja)
DE (1) DE102005054616B3 (ja)
ES (1) ES2421158T3 (ja)
PL (1) PL1948374T3 (ja)
RU (1) RU2412779C2 (ja)
SI (1) SI1948374T1 (ja)
UA (1) UA95089C2 (ja)
WO (1) WO2007057238A1 (ja)
ZA (1) ZA200803348B (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016105795A1 (de) * 2016-03-30 2017-10-05 Access E.V. Kokille zum Gießen eines konturierten Metallgegenstandes, insbesondere aus TiAl

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CN102728809B (zh) * 2012-07-05 2014-07-23 韶关市大善食品设备有限公司 一种绞肉机构机体及其制作方法
DE102015210400A1 (de) 2015-06-05 2016-12-08 Oskar Frech Gmbh + Co. Kg Heißkanal-Angusssystem für eine Druckgießform
DE102015015368A1 (de) 2015-11-28 2016-05-12 Daimler Ag Gießform zum Herstellen von unterschiedlichen Bauvarianten eines Gussteils, insbesondere für ein Fahrzeug
JP6733532B2 (ja) * 2016-12-14 2020-08-05 トヨタ自動車株式会社 ダイカスト金型
CN107598125A (zh) * 2017-10-23 2018-01-19 天津市慧德工贸有限公司 一种嵌装式汽车水泵壳体浇铸模具
JP6527632B1 (ja) * 2018-12-20 2019-06-05 本田金属技術株式会社 鋳造装置
CN113732268A (zh) * 2021-11-04 2021-12-03 中铁建电气化局集团轨道交通器材有限公司 定位支座本体低压模具

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Publication number Priority date Publication date Assignee Title
DE102016105795A1 (de) * 2016-03-30 2017-10-05 Access E.V. Kokille zum Gießen eines konturierten Metallgegenstandes, insbesondere aus TiAl

Also Published As

Publication number Publication date
KR20080067673A (ko) 2008-07-21
EP1948374A1 (de) 2008-07-30
RU2008123849A (ru) 2009-12-27
ZA200803348B (en) 2009-10-28
ES2421158T3 (es) 2013-08-29
KR101270229B1 (ko) 2013-05-31
CA2625622A1 (en) 2007-05-24
PL1948374T3 (pl) 2013-09-30
UA95089C2 (ru) 2011-07-11
SI1948374T1 (sl) 2013-08-30
AU2006314739A1 (en) 2007-05-24
RU2412779C2 (ru) 2011-02-27
DE102005054616B3 (de) 2006-11-09
US20080296471A1 (en) 2008-12-04
JP5566027B2 (ja) 2014-08-06
WO2007057238A1 (de) 2007-05-24
CN101365551A (zh) 2009-02-11
BRPI0618566A2 (pt) 2011-09-06
BRPI0618566B1 (pt) 2014-07-29
US7975751B2 (en) 2011-07-12
CN101365551B (zh) 2011-07-13
JP2009515708A (ja) 2009-04-16

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