EP2062667A2 - Tige de piston d'éjection pour une machine de coulée - Google Patents

Tige de piston d'éjection pour une machine de coulée Download PDF

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Publication number
EP2062667A2
EP2062667A2 EP08020498A EP08020498A EP2062667A2 EP 2062667 A2 EP2062667 A2 EP 2062667A2 EP 08020498 A EP08020498 A EP 08020498A EP 08020498 A EP08020498 A EP 08020498A EP 2062667 A2 EP2062667 A2 EP 2062667A2
Authority
EP
European Patent Office
Prior art keywords
base body
coupling
casting
casting piston
piston
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.)
Granted
Application number
EP08020498A
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German (de)
English (en)
Other versions
EP2062667B1 (fr
EP2062667A3 (fr
Inventor
Friedrich Prof. Dr. H. C. Klein
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Individual
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Individual
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Publication of EP2062667A2 publication Critical patent/EP2062667A2/fr
Publication of EP2062667A3 publication Critical patent/EP2062667A3/fr
Application granted granted Critical
Publication of EP2062667B1 publication Critical patent/EP2062667B1/fr
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Classifications

    • 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
    • B22D17/2015—Means for forcing the molten metal into the die
    • B22D17/203—Injection pistons
    • 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
    • B22D17/2015—Means for forcing the molten metal into the die
    • B22D17/2038—Heating, cooling or lubricating the injection unit

Definitions

  • the invention relates to a casting piston rod for a casting machine, in particular for a die casting machine.
  • hot chamber die casting machines are used for the die casting process, in particular for casting zinc and magnesium alloys, as well as cold chamber die casting machines, in particular for casting aluminum and magnesium alloys.
  • the melts of Al, Zn, Mg and other alloys or casting materials having an adjustable flow rate in a range of, for example, between about 20m / s and about 100m / s or more in a mold-filling phase within a relatively short mold-filling time usually poured between about 5ms and about 300ms in metallic permanent molds.
  • the die casting process typically takes place in three phases, namely a prefilling phase in which the melt is preferably conveyed to the so-called bleed, the short mold-filling phase and a holding-pressure phase in which the melt is under an adjustable high holding pressure of, for example, between about 100 bar to about 1,500 bar solidifies.
  • the kinetic energy of the melt for filling a mold cavity usually formed by a fixed and a movable mold half is usually applied via hydraulic casting units of the die casting machine, wherein a corresponding overall system of hydraulic fluid, hydraulic piston, G confusekolbenstange, casting piston and melt with adjustable speed both in the Vor colllphase than is also moved in the mold filling phase.
  • system speeds of more than 10 m / s can be set depending on the machine type. Since the melts are practically incompressible, at the end of the mold filling phase, the casting piston practically travels to a "fixed wall", in terms of energy and momentum.
  • the kinetic energy of the entire moving system which is proportional to its mass multiplied by the square of velocity, is converted abruptly into a pressure pulse and then into heat.
  • the casting piston rod usually consists of a steel material and has a considerable proportion of the total mass of the moving system.
  • the patent DE 199 01 868 B4 discloses for use in a die casting machine a casting piston rod having a central axial blind bore for weight reduction and laterally therefrom an axial coolant supply passage and an axial coolant discharge passage.
  • the blind bore On the side of a casting piston to be coupled, the blind bore is closed by an insert on which a casting piston leading axial cooling tube is set.
  • the cooling tube communicates via a first connecting channel in the insert with theméffenzu Switzerlandkanal in communication, and an annular gap between the cooling tube and the surrounding cylindrical wall of the cylindrical insert is connected via a second connecting channel in the insert with thehariffenab 2018,kanal in combination.
  • the reduced weight of the piston rod due to the axial blind bore is said to cause weight-related frictional wear between the generally horizontally disposed casting piston and an associated filling chamber reduce.
  • the patent CH 417 863 discloses a die-casting machine with a hydraulic shot unit comprising a drive piston displaceable in a cylinder, which is integrally provided with a piston rod carrying a casting piston.
  • Drive piston and casting piston rod are made in lightweight material, preferably a light metal, such as an aluminum alloy, alternatively made of pressure-resistant plastic material or a hollow lightweight steel construction.
  • the casting piston is made of a high temperature resistant material, such as a porcelain material.
  • the layout DE 1 291 864 discloses a hydraulic shot unit for die casting machines with a purpose for mass reduction hollow cylindrical casting piston rod, which is provided on the drive side with a massearm running drive piston and carries at its other end a hollow cylindrical shaped casting piston.
  • the Utility Model DE 297 03 444 U1 discloses a piston rod for a linear drive, which consists of aluminum material for the purpose of mass reduction and is coated with an anodized cover layer for increased wear resistance.
  • a hollow piston rod which may in particular also be made of a light metal material, is for use in a piston-cylinder assembly with integrated permanent magnet switch in the patent DE 37 34 547 C2 disclosed.
  • the piston rod may be provided at both axial end portions each with an internal thread to at one end a threaded portion connected to the piston and at the other end a couplable with a power take-off connection part screwed.
  • the threaded part and the connecting part may be made of stainless steel, for example.
  • the invention is based on the technical problem of providing a casting piston rod, which can be relatively easily manufactured and, e.g. is optimized for use in a die casting machine in terms of their contribution to the kinetic energy of the moving casting system containing them which is to be converted at the end of the mold filling phase.
  • the invention solves this problem by providing a casting piston rod with the features of claim 1 or 4.
  • the casting piston rod according to the invention consists wholly or predominantly of a light metal material.
  • it includes a wholly or predominantly consisting of the light metal material body on which a coupling for coupling a casting piston and / or a coupling for coupling a drive piston are arranged.
  • the pressure pulse amplitude is reduced due to the typically significantly lower modulus of elasticity for a light metal material as compared to steel and other heavy metal materials.
  • the base body is cylindrical, wherein the casting piston coupling are arranged on one cylinder end side and the drive piston coupling on the other cylinder front side.
  • the base body is provided with an axial cooling channel bore. This provides the opportunity to pass a coolant through the plunger rod to cool the same and, when needed, components coupled thereto.
  • the base body has a cooling channel inlet bore and a cooling channel outlet bore, which open out at the base circumference and communicate with the cooling channel bore, so that coolant is introduced into the base body via the inlet bore and discharged therefrom via the outlet bore can be.
  • a cooling tube with the formation of an annular gap and an insert are inserted into the cooling channel bore, wherein the insert connects the cooling tube interior to the inlet bore, while the annular gap opens via the outlet bore.
  • the inlet and the outlet bore may be provided on a same axial half-side of the base body, e.g. on its half facing the drive piston coupling.
  • the casting piston coupling and / or the drive piston coupling may consist of the same material as the base body and be integrally formed on the base body, which allows, for example, the common production of a blank.
  • Advantageous light metal materials for the casting piston rod are in an embodiment of the invention metal alloys with aluminum or magnesium as the main component.
  • the in the Fig. 1 to 3 illustrated casting piston rod is suitable for die casting machines of hot chamber and cold chamber type and has a cylindrical base body 1, which is uniform, ie continuous, made of a light metal material.
  • the light metal material may in particular be a metal alloy with aluminum or magesium as the main component, alternatively another light metal material, as far as it is for the casting piston rods of casting machines existing requirements, especially with regard to temperature and pressure loads grown.
  • the light metal material may be, for example, an aluminum alloy or a magnesium alloy.
  • the use of titanium comes here as a light metal into consideration, either as the main component or as a minority component of a corresponding alloy.
  • a casting piston coupling 2 and on the other end face a drive piston coupling 3 are integrally formed on one end face.
  • the casting piston coupling 2 has a conventional form for coupling a conventional casting piston.
  • the drive piston clutch 3 has a conventional form for coupling a conventional hydraulic piston or other drive piston, such as a cylindrical disk shape.
  • the main body 1 and the two clutches 2, 3 can be manufactured in one piece from a light metal blank.
  • the cylindrical base body 1 is also provided with a continuous central axial bore, which is stepped in two parts, comprising a first, shorter bore portion 4 of larger diameter on the side of the drive piston coupling 3 and a remaining second bore portion 5 of greater length and smaller diameter.
  • the bore serves as a cooling channel bore, wherein in the cylinder surface of the cylindrical base body 1, a radial cooling channel inlet bore 6 and a radial cooling channel outlet bore 7 are introduced.
  • the inlet bore 6 leads from the outside to the first radial bore section 4, while the outlet bore from the second axial bore section 5 leads to the outside.
  • the inlet bore 6 and the outlet bore 7 are both on a same axial half-side of the cylindrical base body 1, on the hydraulic pressure piston to be coupled facing side. This can have advantages in terms of accessibility of the inlet and outlet bores 6, 7 in the installed state of the casting piston rod.
  • Fig. 4 shows the casting piston rod of the Fig. 1 to 3 after insertion of a cooling tube 8 and an insert 10 in the axial bore 4, 5.
  • the cooling tube 8 extends in the second bore portion 5 of the axial cooling passage bore and on the side of the casting piston coupling 2 on the base body 1 addition, to conventional, not here closer to explanatory manner to supply a coupled casting piston coolant, with which the casting piston and the casting piston rod can be tempered.
  • the cooling tube 8 has a smaller outer diameter than the inner diameter of the second bore section 5, so that an annular gap 9 is formed between the cooling tube 8 and the surrounding base body 1.
  • the insert 10 is inserted fluid-tight in the first bore section 4, wherein it closes the annular gap 9 with a front end face 10a frontally. It may consist of the same light metal material as the cylindrical base body 1, but alternatively also of another light metal material or a non-light metal material.
  • the insert 10 has a connection channel 11 which, as shown, includes a radial and an axial portion such that it provides fluid communication between the radial inlet bore 6 and the interior of the cooling tube 8 at its respective front end.
  • a liquid or gaseous coolant from the outside via the inlet bore 6 and the connecting channel 11 are introduced into the interior of the cooling tube 8 and guided by this to the casting piston.
  • the coolant enters the annular channel 9 between the cooling tube 8 and body 1 and is in this by the Base body 1 passed through to the outlet bore 7, via which it then passes out of the casting piston rod out.
  • the outlet bore 7 serves as an inlet and the inlet bore 6 as an outlet of the coolant in or out of the casting piston rod.
  • the casting piston rod of Fig. 1 to 4 a completely made of light metal existing cylindrical body provided on the couplings for coupling a casting piston on the one hand and a drive piston, such as a conventional hydraulic piston, on the other hand integrally formed in a simple manufacturing technology.
  • the axial cooling channel bore with inserted insert and cooling tube enables effective temperature control of the casting piston rod and casting piston. Regardless of the material of the insert and the cooling tube, which make up only a smaller part of the entire G mankolbenstangensystems, so that the casting piston rod in any case predominantly in its volume of light metal.
  • Fig. 5 shows a variant of the casting piston rod of Fig. 1 to 4 , wherein identical reference numerals are used for identical or functionally equivalent elements and in this respect to the above explanations to the Fig. 1 to 4 reference to the functions and benefits of the elements concerned.
  • the casting piston rod of Fig. 5 is different from the one of Fig. 1 to 4 in that a drive piston coupling is provided as a separate component 3 '.
  • This separate drive piston coupling piece 3 ' is made in the example shown in the manner of a cup-shaped end cap with internal thread and on the associated front end of the extent to the example of Fig. 1 to 4 unscrewed modified base body 1, for this purpose in the respective front end with a matching external thread instead of the example in the Fig. 1 to 4 molded drive piston coupling 3 is provided.
  • the drive piston coupling material can be decoupled from the base body 1, ie, for the coupling piece 3' can be selected if required, a different material than the light metal material of the base body 1.
  • the production of the separate drive piston coupling piece 3 'from a steel material comes into consideration.
  • an optimized adaptation of the still predominantly made of light metal material casting piston rod to the coupling of a conventional hydraulic piston a Druckg screenmaschine be achieved without affecting the advantages associated with the predominant use of light metal material for the casting piston rod, explained above.
  • the drive piston clutch 3 ' as a separate component without the body 1, for example, be replaced during maintenance.
  • any other conventional releasable or non-releasable attachment for attaching the separate drive piston coupling 3 ' may be provided on the base body 1, eg shrinking.
  • the production can be facilitated by the two-part realization of cylindrical body and drive piston coupling.
  • casting piston rod is the only difference to that of Fig. 5 the casting piston coupling realized as a separate component 2 '.
  • the separate casting piston coupling piece 2 ' is attached to the facing end side of the extent modified basic body 1, wherein by way of example, a shrinking an annular end of the coupling piece 2' is provided on a frontal stump of the base body 1 such that there is a smooth, flush transition of the outside of body 1 and coupling piece 2 'results.
  • any other conventional fastening can be provided to determine the coupling piece 2 'at the relevant front end of the base body 1, for example by screwing.
  • the separate casting piston coupling piece 2 apply the same advantages as for the separate drive piston coupling piece 3', in particular with regard to material decoupling from the light metal material of the base body 1 and the resulting possibilities of a optimum matching to the needs of the component to be coupled, here the casting piston.
  • a production of the casting piston coupling piece 2 ' may be provided from a steel material in this case, which may contribute to increased protection of the light metal body 1, for example, from the effects of temperature and attack by the melt.
  • the casting piston rod through the light metal base body 1 largely made of light metal material, so that the above for the embodiment of Fig. 1 to 4 explained advantages over conventional, consisting mainly of non-light metal material G mankolbenstangen in the same way on the casting piston rod of Fig. 6 hold true.
  • the casting piston rod can also be mixed of light metal material and non-light metal material, as long as the casting piston rod is still based on volume or weight still predominantly made of light metal material. Even in such alternative embodiments, the predominant use of light metal material results in the advantages explained above with regard to reducing the kinetic energy to be converted and the pressure pulse amplitude at the end of the mold filling phase.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
EP08020498.5A 2007-11-26 2008-11-26 Tige de piston d'éjection pour une machine de coulée Active EP2062667B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007058254A DE102007058254A1 (de) 2007-11-26 2007-11-26 Gießkolbenstange für eine Gießmaschine

Publications (3)

Publication Number Publication Date
EP2062667A2 true EP2062667A2 (fr) 2009-05-27
EP2062667A3 EP2062667A3 (fr) 2009-06-17
EP2062667B1 EP2062667B1 (fr) 2016-04-06

Family

ID=40342182

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08020498.5A Active EP2062667B1 (fr) 2007-11-26 2008-11-26 Tige de piston d'éjection pour une machine de coulée

Country Status (2)

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EP (1) EP2062667B1 (fr)
DE (1) DE102007058254A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH417863A (de) 1964-05-13 1966-07-31 Buehler Ag Geb Druckgiessmaschine mit hydraulischer Schusseinheit
DE1291864B (de) 1966-03-25 1969-04-03 Fries Sohn J S Schiesseinrichtung fuer Druckgiessmaschinen
DE3734547C2 (fr) 1987-10-13 1993-05-13 Festo Kg, 7300 Esslingen, De
DE29703444U1 (de) 1997-02-26 1997-04-10 Festo Kg, 73734 Esslingen Kolbenstange für einen Linearantrieb
DE19901868B4 (de) 1999-01-19 2007-07-26 Wieland-Werke Ag Kolbenstange einer Druckgießmaschine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1347780A (fr) * 1962-11-19 1964-01-04 Philips Brasil Perfectionnements aux systèmes de protection pour ventilateurs ou analogues
JPS60250866A (ja) * 1984-05-25 1985-12-11 Toshiba Mach Co Ltd ダイカスト機
DE19838943C2 (de) * 1997-10-23 2000-10-12 Mannesmann Sachs Ag Befestigung eines Anlenkteils auf einem Kolben-Zylinderaggregat
JP4272413B2 (ja) * 2002-11-18 2009-06-03 株式会社ソディックプラステック コールドチャンバダイカスト成形機の射出装置及びその計量方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH417863A (de) 1964-05-13 1966-07-31 Buehler Ag Geb Druckgiessmaschine mit hydraulischer Schusseinheit
DE1291864B (de) 1966-03-25 1969-04-03 Fries Sohn J S Schiesseinrichtung fuer Druckgiessmaschinen
DE3734547C2 (fr) 1987-10-13 1993-05-13 Festo Kg, 7300 Esslingen, De
DE29703444U1 (de) 1997-02-26 1997-04-10 Festo Kg, 73734 Esslingen Kolbenstange für einen Linearantrieb
DE19901868B4 (de) 1999-01-19 2007-07-26 Wieland-Werke Ag Kolbenstange einer Druckgießmaschine

Also Published As

Publication number Publication date
DE102007058254A1 (de) 2009-05-28
EP2062667B1 (fr) 2016-04-06
EP2062667A3 (fr) 2009-06-17

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