WO2000006323A1 - Eingusssystem für das thixoformen - Google Patents
Eingusssystem für das thixoformen Download PDFInfo
- Publication number
- WO2000006323A1 WO2000006323A1 PCT/EP1999/004862 EP9904862W WO0006323A1 WO 2000006323 A1 WO2000006323 A1 WO 2000006323A1 EP 9904862 W EP9904862 W EP 9904862W WO 0006323 A1 WO0006323 A1 WO 0006323A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- casting
- cavity
- sprue
- cross
- opening
- Prior art date
Links
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
- B22D17/007—Semi-solid pressure die casting
-
- 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
- B22D17/2272—Sprue channels
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S164/00—Metal founding
- Y10S164/90—Rheo-casting
Definitions
- the present invention relates to a die casting machine for producing molded parts from thixotropic metal bolts, comprising a casting system which connects a cylindrical casting chamber cavity with a mold cavity, the casting system having a cylindrical casting cavity directly adjacent to the casting chamber cavity and containing at least one casting channel, and all of the casting channels laterally lead away from the lateral surface of the pouring cavity, and each pouring channel has a concentric center line and at its end directed towards the mold cavity has an inlet opening for introducing the thixotropic metal alloy into the mold cavity, and the connection of the pouring system to the casting chamber cavity by means of a perpendicular to a concentric longitudinal axis of the cylindrical casting chamber cavity Through opening happens, and the inlet openings are arranged with respect to the through opening such that the surface nnormal of the inlet openings do not coincide with the longitudinal axis of the cylindrical casting chamber cavity.
- EP-A 0 718 059 describes a horizontal die-casting machine for producing molded parts from a thixotropic alloy slurry, the die-casting machine containing an oxide scraper to avoid oxide inclusions in the alloy structure of the molded part.
- thixoforms The process for the production of molded parts from thixotropic, i.e. partially solid / partially liquid, metal bolts are referred to as thixoforms. All bolts made of a metal which can be converted into a thixotropic state are suitable as metal bolts.
- the metal bolts can consist of aluminum, magnesium or zinc or of alloys of these metals.
- the thixotropic properties of liquid or partially solid metal alloys are used in thixoforming.
- the thixotropic behavior of a metal alloy is understood to mean that a correspondingly prepared metal behaves unloaded like a solid, but reduces its viscosity under shear stress to such an extent that it behaves similarly to a molten metal. This requires heating the alloy in the solidification interval between the liquidus and solidus temperature. The temperature is to be set so that, for example, a microstructure content of 20 to 80% by weight is melted, but the rest remains in solid form.
- semi-solid / semi-liquid metal is processed into molded parts in a modified die casting machine.
- the die casting machines used for thixoforming differ from the die casting machines for die casting metal melts by, for example, a longer casting chamber for receiving the thixotropic metal pin and a larger piston stroke required as a result, and, for example, a mechanically reinforced design of the parts of the die casting machine that guide the thixotropic metal alloy due to the higher pressure load of these parts during thixoforming.
- Thixoforming is done, for example, with a horizontal die casting machine. In these machines, the casting chamber, which receives the thixotropic metal bolt, lies horizontally.
- a thixotropic metal bolt is placed in such a horizontal casting chamber of a die casting machine and is introduced into a mold which is usually made of steel, in particular hot-work steel, at high speed and under high pressure by applying pressure by means of a casting piston, i.e. introduced or shot into the mold cavity of the mold, the thixotropic metal alloy solidifying in it.
- the pressure on the thixotropic metal bolt is typically 200 to 1500 bar and in particular between 500 and 1000 bar.
- the flow velocity of the thixotropic alloy slurry caused thereby is, for example, 0.2 to 3 m / s and in particular 0.3 to 2 m / s.
- the casting structure that forms in the casting mold during the solidification of the thixotropic metal alloy essentially determines the properties of the molded parts.
- the microstructure formation is characterized by the phases, such as mixed crystal and eutectic phases, the cast grain, such as globules and dendrites, segregations as well as structural defects, such as porosity (gas pores, micro voids), and contaminants, such as oxides.
- the metal bolts used for the thixoforming of partially solid alloys have a fine grain due to the process, which - if there is no grain coarsening during the pretreatment of the thixotropic metal bolts, i.e. during the heating of the metal bolts and their transport into the die casting machine - can be found again in the alloy structure of the molded parts.
- a fine grain generally improves the material properties, increases the homogeneity of the alloy structure and helps to avoid structural defects in the molded part.
- the thixoforming of partially solid alloys also shows other significant advantages compared to the die casting of molten metals.
- the thixotropic metal bolts are less compared to the die casting of metal melts than the thixoforming must be heated up high and therefore less long and secondly cooled more quickly in the casting mold or returned to a solid state, which contributes to a reduction in grain coarsening.
- the energy saving results primarily from the fact that a large part of the heat of fusion and the total overheating heat, i.e. the heat additionally supplied to the metal alloy to achieve a temperature rise above the melting point to ensure the molten state of the metal alloy, and the energy for keeping the melt warm are eliminated.
- Another advantage is the better dimensional accuracy due to less shrinkage and the production of molded parts close to the final dimension, reducing the number of machining steps and saving alloy material.
- the processing temperature of the individual components of the die casting machine is lower due to the processing temperature being reduced by approximately 100 ° C., which increases the tool life.
- the lower processing temperature of thixoforming compared to the die casting of metal melts also enables the processing of alloys with a low iron content, since the tools are not removed by melting.
- thixoforming allows better mold filling with fewer air pockets.
- a metal bolt in the thixotropic state is placed in a casting chamber (or more precisely: in a casting chamber cavity located in the casting chamber) and by means of pressurization through a mostly cylindrical constriction at one end the casting chamber, the so-called through opening.
- the thixotropic material is sheared.
- the sheared, thixotropic material is then deflected into trapezoidal pouring channels, starting from a pouring cavity adjacent to the through opening, and then reaches the mold cavity of a casting mold.
- the sprue channels are usually arranged at approximately a right angle to the concentric central axis of the through opening.
- the arrangement between the casting chamber and the mold cavity is referred to below as the pouring system.
- the pouring system thus serves to introduce the thixotropic alloy slurry in the casting chamber into the mold cavity of the casting mold.
- thixotropic alloy Due to the mechanical stress on the thixotropic alloy pulp during its transfer from the casting chamber cavity into the mold cavity, shear softening of the thixotropic alloy occurs, ie the thixotropic alloy becomes more liquid as a result of the shear softening.
- the following requirements are placed on a pouring system for thixoforming: a) Good filling behavior: The pouring system must be filled as evenly as possible over its entire cross-section. In addition, there must be no gas or oxide inclusions in the speed range of the thixotropic alloy. b) Good flow behavior: The flow must be as laminar as possible so that turbulence and unwanted softening of the thixotropic material are avoided.
- the pouring systems known from the prior art only partially meet these requirements.
- the known pouring systems have too large a volume, so that the output of thixotropic material per molded part can be significantly improved. Too large a volume of the pouring system used particularly affects the economics of the process.
- the filling behavior of a sprue system can vary depending on the piston speed and the initial state of the thixotropic pin. For example, at high piston speeds, undesirable air pockets can occur in the thixotropic alloy slurry of the casting system come. If the mold is filled very quickly, turbulent flow conditions can occur during thixoforming, which can lead to gas inclusions (air, release agents or lubricants) in the molded part, which often makes any subsequent heat treatment, such as solution annealing, of the molded part impossible. Gas inclusions close to the surface of the molded part can, for example, lead to undesirable bubble formation during solution annealing due to the high gas pressure.
- Another disadvantage of the known pouring systems relates to the uneven flow behavior.
- the flow that arises during thixoforming after filling the pouring system with thixotropic material is in most cases uneven.
- each sprue has a circular or elliptical cross-section with a substantially constant cross-sectional area over its entire length and contains a bend immediately after the sprue cavity, the part of the sprue located between the bend and the inlet opening being a straight, tubular one Describes the channel piece and the elbow is designed in such a way that its center line has a constant bending radius and a tangent to the center line drawn further to the through opening with the same bending radius at the through opening runs parallel to the longitudinal axis of the cylindrical casting chamber cavity and a tangent to the center line against the Inlet opening directed end of the manifold coincides with the center line of the straight, tubular duct piece.
- each pouring channel preferably has a constant cross-sectional area between the pouring cavity and the inlet opening. This keeps the flow rate of the thixotropic alloy as constant as possible and minimizes the shear effect on the thixotropic alloy.
- the sum of the cross-sectional areas of the individual sprue channels essentially corresponds to the cross-sectional area of the through opening.
- the sum of the cross-sectional areas of the individual pouring channels that adhere to the casting cavity particularly preferably does not deviate from the cross-sectional area of the through opening by more than ⁇ 10%.
- the pouring channel contains a gate region at its end directed against the mold cavity, which ends in the corresponding inlet opening.
- the pouring channels between the pouring cavity and the respective gate area preferably have a tubular channel piece with a circular cross section and a constant radius.
- the channel piece between the casting cavity and the gate area relates on the one hand to the elbow and on the other hand to the straight channel piece of each gate channel between the elbow and the gate area.
- This circular cross-section minimizes the surface to volume ratio.
- the circular cross-section allows full use of the available channel cross-section.
- the inlet openings preferably have an elliptical cross section.
- the inlet opening results from the intersection of the gate area of the pouring channel with the diverging molded part produced in the mold cavity. In the case of a flat molded part wall, this results in an elliptical inlet opening. Curved molded part geometries usually result in more complex cutting surfaces.
- the gate area represents a channel-shaped transition area between the straight section of the sprue with a circular cross-section and the inlet opening.
- the gate area preferably has a cross-section along its center line which gradually changes from a circular to an increasingly flat elliptical cross-section, this transition area ends in an elliptical cross section corresponding to the inlet opening.
- the amount of the cross-sectional area in the gate area is preferably kept essentially constant, which also includes changes in the amount of the cross-sectional area of up to 30%; in particular, the cross section of the gate region can gradually widen or narrow somewhat along its center line.
- the casting system according to the invention has a collecting pocket for the end oxide layer of the thixotropic metal bolt.
- a metal oxide layer usually forms.
- the oxidic outer surface of the thixotropic metal bolt is usually removed before or in the casting chamber.
- An oxide layer usually remains on the end face of the thixotropic bolt.
- the casting system according to the invention is preferably used for horizontal die casting machines.
- the straight duct sections of the sprue ducts are more preferably perpendicular to the longitudinal axis of the casting chamber cavity.
- the bending radius of the center line in the bend of a sprue corresponds to the distance of the through opening from a straight line, containing the center line of the straight, tubular duct section of the corresponding sprue.
- the bending radius of a center line in the manifold area is determined, for example, by determining the intersection of the bisector between the longitudinal axis of the casting chamber cavity and the center line of the straight section of the corresponding sprue with a plane through the through opening, the distance of this intersection from the center of the Through opening gives the bending radius Rk.
- the transition between the casting chamber cavity and the casting cavity can be configured to be sharp-edged or rounded. In the case of the sharp-edged design, this transition is described through the through opening. However, a rounded transition is preferred.
- the through opening is described by the point at which the cross-section is the smallest, or else the cross-section assumes a constant value, ie it changes into a casting cavity with a constant cross-section.
- a transition area is thus formed with a continuously tapering cross section.
- the casting system according to the invention is suitable in principle for the thixoforming of all metal alloys which can be converted into a thixotropic state.
- the casting system according to the invention is preferably used for the thixoforming of aluminum, magnesium or zinc alloys.
- the casting system according to the invention is particularly preferably suitable for thixoforming of die-cast aluminum alloys, in particular for AlSi, AlSiMg, AlSiCu, AlMg, AICuTi and AICuZnMg alloys.
- the pouring system essential to the invention has the following advantages over the prior art: a) Minimum volume of the pouring system:
- the filling behavior of the pouring system is in the mold filling speed range usually used for thixoforming, i.e. the flow rate of the thixotropic alloy, very good-natured, i.e. No air pockets are formed even at relatively high flow velocities.
- the piston pressure is transmitted very well through the pouring channels curved according to the invention, i.e. the pressure loss in the sprue channels is minimal and, due to the hydrostatic pressure, is primarily determined by the selected height of the corresponding inlet opening. Due to the low pressure drop in the sprue channels, the make-up behavior is also essentially determined by the height of the inlet openings.
- Die casting machine with a horizontally located casting chamber in which the transition from the casting chamber cavity to the casting cavity is sharp-edged and the casting system has two casting channels of the same dimensions, each with a gate area.
- the bend radius of the manifolds is 42.5 mm.
- the through hole diameter is 35 mm.
- the pouring cavity is circular-cylindrical and has a horizontally lying, concentric longitudinal axis, which also coincides with the concentric longitudinal axis of the casting chamber cavity.
- the casting cavity has a diameter of 35 mm.
- the length of the casting cavity is designed such that a collecting pocket for the end oxides of the thixotropic bolts is formed between the two elbows, the cross-sectional dimensions of the collecting pocket corresponding to those of the casting cavity.
- the straight duct section of each sprue is vertical and is thus perpendicular to the concentric longitudinal axis of the casting chamber cavity, one sprue leading vertically downwards and the other sprue vertically upwards.
- the height of the beginning of the gate area measured from the concentric longitudinal axis of the casting chamber cavity is 102.5 mm.
- the length of the gate area is 50 mm.
- the inlet openings are in a horizontal plane and have an elliptical shape with a major axis length a and a minor axis length b.
- the main axis a of the inlet opening paraUel lies to the z-axis and the secondary axis b parallel to the x-axis.
- FIG. 1 schematically shows a partial view of a longitudinal section of a device according to the invention which runs vertically through the concentric longitudinal axis of the casting chamber cavity
- FIG. 2 shows a top view of the draining machine shown in FIG. 1 in longitudinal section along the line A-A.
- FIG. 3 shows a plan view of the draining machine shown in FIGS. 1 and 2 along the line B-B.
- FIG. 4 schematically shows a partial view of a longitudinal section of a further die casting machine according to the invention with a single sprue, which runs vertically through the concentric longitudinal axis of the casting chamber cavity.
- FIG. 5 shows a top view of the draining machine shown in FIG. 4 in longitudinal section along the line CC.
- FIG. 6 schematically shows a partial view of a longitudinal section of a further draining machine according to the invention with four sprue ducts, which runs vertically through the concentric longitudinal axis of the casting chamber cavity.
- FIG. 7 shows a plan view of the die casting machine shown in FIG. 6 in longitudinal section along the line D-D.
- FIG. 8 shows various embodiments of a section of the upper sprue shown in FIG. 1, this section particularly relating to the gate area of the upper sprue and FIG. 8 shows various embodiments of this gate region in a longitudinal section running vertically through the concentric longitudinal axis of the casting chamber cavity.
- FIG. 9 shows the top view of the embodiment shapes shown in FIG. 8 in longitudinal section of the gate area of FIG. 1 along the line A-A.
- Figures 1 to 9 relate, by way of example, to views of a horizontal die casting machine according to the invention, i.e. a die casting machine with a horizontally arranged casting chamber.
- FIG. 1 shows a partial view of a longitudinal section of a horizontal die casting machine according to the invention for the production of molded parts from thixotropic metal bolts which runs vertically through the concentric longitudinal axis 1 of the casting chamber cavity 12, a part of the horizontally located casting chamber 10 and the casting
- the casting chamber 10 contains a cylindrical casting chamber cavity 12 which has a concentric longitudinal axis 1.
- the pouring system 17 connects the casting chamber cavity 12 to the mold cavity (not shown).
- the pouring system shown in Figure 1
- the 30 17 has two sprue ducts, the sprue 20 and the sprue 21.
- the sprue channels 20 and 21 represent tubular buildings, the cavities of which each have a concentric center line mi or m2.
- the pouring channels 20, 21 are connected to the casting chamber cavity 12 by means of a through opening 14 common to both pouring channels.
- the through opening is perpendicular to the longitudinal axis 1
- the thixotropic alloy slurry is pressed in the direction of measurement x through the through opening 14 of the casting chamber 10 and passes through the pouring channels 20, 21 into the mold cavity of the casting mold (not shown).
- the transition from the casting chamber cavity 12 to the through opening 14 can be sharp-edged or rounded.
- the through opening 14 is located directly at the end of the casting chamber 10 on the side of the sprue.
- the die casting machine shown in FIG. 1 shows a rounded transition between the casting chamber cavity 12 and the through opening 14. This creates a transition region 16 which tapers continuously in the direction of travel x.
- the pouring system 17 has a circular-circular pouring cavity 19 directly adjacent to the through opening 14, the cross-sectional area of the pouring cavity 19 shown in FIG. 1 corresponding to the cross-sectional area of the through opening 14 and a concentric longitudinal axis of the pouring cavity 19 coinciding with the longitudinal axis 1 of the casting chamber cavity 12 .
- the pouring channels 20, 21 - seen in the direction of the x direction - all lead laterally away from the lateral surface of the pouring cavity 19.
- the sprue channels 20, 21 have a circular or elliptical cross-section, the cross-sectional area of the sprue channels 20, 21 in terms of amount over their entire length, i.e. between the casting cavity 19 and the inlet opening 35 remains constant.
- the sprue channels 20, 21 immediately after the sprue cavity 19 contain a bend 25, 26, i.e. a curved, tubular section.
- the part of each sprue 20, 21 located between the elbow 25, 26 and the inlet opening 35 describes a straight, tubular piece of duct.
- each center line mj, ni2 describes a curved curve, the curved part of the curve according to the invention being at the beginning of the pouring channel 20 , 21, ie after the casting cavity 19, is located.
- the curved part of the center line mi, m 2 has a constant bending radius Rki, Rk 2.
- the part of the sprue 20 or 21 comprising the curved part of the center line mi or m 2 is the elbow 25 or 26.
- the elbow is 25 , 26 each in such a way that a tangent to the center line m j , m 2 am, which is extended to the through opening 14 with the same bending radius Rki, Rk 2 the beginning of the manifold located against the through opening 14 runs parallel to the longitudinal axis 1 of the cylindrical casting chamber cavity 12
- the bending radii Rk j , Rk 2 of the center lines mi, m 2 in the elbows 25, 26 are selected such that they correspond to the distance d of the through opening 14 from the center line m 1; m of the straight duct section of the respective sprue 20, 21 correspond.
- a straight section of the pouring channel 20 or 21 adjoins the mold cavity-side end 73 or 74 of the elbow 25 or 26, so that the center line m ⁇ m 2 of each pouring channel 20, 21 between the mold cavity-side manifold end 73 , 74 and the inlet opening 35, 36 describes a straight line.
- the straight parts of the sprue channels 20, 21 are perpendicular to the concentric longitudinal axis 1 of the casting chamber cavity 12. Accordingly, the center lines mi, m 2 of the straight sections of the sprue channels 20, 21 are perpendicular to the longitudinal axis 1.
- the elbows 25, 26 are further configured in such a way that a tangent to the curved center line mi, m 2 at the end 73, 74 of the elbow directed against the inlet opening 35 coincides with the center line mi, m of the straight duct section of the corresponding sprue 20, 21.
- the sprue channels 20 and 21 each have a gate region at their end directed against the mold cavity, which ends in the corresponding inlet opening 35, only the gate region 30 of the sprue channel 20 being shown in FIG.
- the transition from the gate area 30 to the mold cavity takes place through the inlet opening 35, which is perpendicular to the center line m, of the straight section of the sprue 20. Therefore, the surface normal NEi of the inlet opening 35 leading through the center of the inlet opening 35 coincides with the center line mi of the straight duct section of the corresponding sprue 20.
- the sprue channels 20, 21 are described between the sprue cavity 19 and the gate area 30, 31 by a tubular channel piece with a circular cross section and constant inner diameter 2 Ri, 2 R 2 .
- the length of the pouring cavity 19 is formed in such a way that the pouring cavity 19 contains a collecting pocket 18 between the elbows 25, 26 for receiving end oxides of the thixotropic metal bolt.
- the pouring cavity 19 thus contains, on the one hand, the elbows 25, 26 which are further flared from the lateral surface of the pouring cavity 19 to the through opening and, on the other hand, the collecting pocket 18.
- the inlet opening 35 shown in FIG. 1 has an euiptic shape, with the minor axis of the ellipse lying parallel to the x-axis in a horizontal plane parallel to the x-z plane, i.e. the minor axis is horizontal and in a vertical plane, which contains the longitudinal axis 1 of the casting chamber cavity 12.
- the inlet opening 35 is thus represented by the minor axis of length 2 b.
- the gate area 30 shown in FIG. 1 relates to a transition area of length c of the pouring channel 20, in which the straight section of the pouring channel 20 with a circular cross section and constant radius Ri merges into the eUiptic cross-sectional shape of the inlet opening 35.
- the gate area 30 in Figure 1 i.e. in a longitudinal section running vertically through the concentric longitudinal axis 1 of the casting chamber cavity 12, has a trapezoidal shape, the trapezoid being isosceles and having two parallel sides of length 2 Ri or 2 b and the paraüelen sides being arranged at a distance c.
- Figure 2 shows a plan view of the die casting machine shown in Figure 1 in longitudinal section along the line AA.
- the circular contour of the collecting pocket 18, the sprue channels 20, 21 leading away perpendicularly therefrom and the gate region 30 of the sprue channel 20 can be seen in particular.
- the gate area 30 describes a continuously widening area of the pouring channel 20, the cross-sectional dimensions of which in this view - starting from the straight channel piece of the pouring channel 20 with a circular cross section - continuously merge into the eUiptic cross section of the inlet opening 35.
- the inlet opening has a maximum extent of the size 2a, where a denotes the main axis of the EUipse of the inlet opening 35.
- FIG. 3 shows a top view of the draining machine shown in FIGS. 1 and 2 along the line BB of FIG. 2.
- the ellipse shown in FIG. 3 thus describes a top view of the inlet opening 35.
- the inlet opening 35 is located in a longitudinal axis 1 of the casting chamber cavity 12 paraüelen horizontal plane, ie in a plane para to Cartesian xz-axes.
- the inlet opening 35 shown in FIG. 3 has a secondary axis of length 2 b and in in the x-direction z-direction on a main axis of length 2a.
- FIG. 4 shows a partial view of a longitudinal section of a further die casting machine according to the invention, running vertically through the concentric longitudinal axis 1 of the casting chamber cavity 12, a part of the horizontal casting chamber 10 with casting chamber cavity 12 and the pouring system 17 being visible in this longitudinal section.
- the pouring system 17 contains a pouring cavity 19 and a single pouring channel 20.
- the transition from the casting chamber cavity 12 to the through opening 14 is rounded.
- the pouring cavity 19 adjacent to the through opening 14 is of circular cylindrical shape, the cross-sectional diameter of the pouring cavity 19 corresponding to the diameter of the through opening 14 and the longitudinal axis of the pouring cavity 19 coinciding with the longitudinal axis 1 of the casting chamber cavity 12.
- a bend 25 of a single pouring channel 20 leads laterally upward from the lateral surface of the pouring cavity 19.
- the sprue 20 has a straight, vertically upwardly extending channel piece, to which a gate region 30 adjoins.
- the gate region 30 tapers conically towards the top and ends in the inlet opening 35.
- the cross-sectional area of the sprue 20 corresponds over its entire length, ie between the pouring cavity 19 and the inlet opening 35, essentially the cross-sectional area of the through opening 14.
- the length of the pouring cavity 19 is such that a collection pocket 18 is created for receiving the end oxides of the thixotropic alloy pulp.
- the length of the pouring cavity 19 corresponds to the distance of the passage opening 14 from a tangential plane normal to the longitudinal axis 1 on the straight part of the pouring channel 20 on the side remote from the casting chamber cavity 12.
- FIG. 5 shows a top view of the draining machine shown in FIG. 4 in longitudinal section along the line CC.
- the sprue 20 is shown with its gate area 30.
- the sprue 20 leads vertically upwards.
- the gate area 30 relates to a continuously widening area of the pouring channel 20
- the shape of the gate area 30 is selected such that, in cooperation with the view shown in FIG. 4, the cross-sectional area of the gate area 30 remains constant over its entire length.
- FIG. 6 schematically shows a partial view of a longitudinal section of a further die casting machine according to the invention which runs vertically through the concentric longitudinal axis 1 of the casting chamber cavity 12.
- the transition from the casting chamber cavity 12 to the through opening 14 is rounded.
- elbows 25, 26, 27, 28 go away from the lateral surface of the casting cavity 19, wherein in Figure 6, ie in a vertical plane along the longitudinal axis 1, only two bends can be seen, namely the bend 25 of a sprue 20 leading vertically upwards and the bend 26 of a sprue 21 leading vertically downwards.
- the bends 25, 26 are pressed straight, vertically duct sections of the pouring ducts 20, 21 leading upwards or vertically downwards with a circular cross section.
- the gate areas 30, 31 which adjoin the straight channel pieces show a conically tapering cross section.
- a protuberance of the casting cavity 19, the so-called collecting pocket 18, is enclosed between the elbows 25, 26.
- FIG. 7 shows a plan view of the draining machine shown in longitudinal section in FIG. 6 along the line DD.
- four cross-shaped sprue channels 20, 21, 22, 23 can be seen.
- the concentric center lines (not shown) of these pouring channels 20, 21, 22, 23 make a right angle in this plan view.
- the collection pocket 18 shown in a circle.
- the corresponding gate areas 30, 31, 32, 33 are attached to the straight sections of the pouring channels 20, 21, 22, 23 which lead away from the collection pocket 18 in the center.
- These gate areas 30, 31, 32, 33 describe the transition area between the straight dew pieces of the sprue channels 20, 21, 22, 23 and the corresponding inlet openings 35, 36, 37, 38.
- the gate areas 30, 31, 32, 33 relate to In this top view, areas of the pouring channels 20, 21, 22, 23 are continuously widened, the shape of the gate areas 30, 31, 32, 33 being selected such that, in cooperation with the view shown in FIG. 4, the cross-sectional area of each gate area 30, 31, 32, 33 remains constant over its entire length.
- AUe four gates 20, 21, 22, 23 have the same shape and the same dimensions.
- the sprue channels 20, 21, 22, 23 are configured in such a way that their cross-sectional area extends beyond their entire length, ie from the casting cavity 19 to the corresponding inlet openings 20, 21, 22, 23 is constant.
- FIG. 8 shows various embodiments of a section of the upper sprue 20 shown in FIG. 1, this section particularly relating to the gate area 30. Accordingly, FIG. 8 shows various embodiments of the gate area 30 in a longitudinal section running vertically through the concentric longitudinal axis 1 of the casting chamber cavity 12. The inlet opening 35 remains unchanged for all embodiments of the gate area 30. It is essential for the shown embodiments of the gate area 30 with the gate walls e, fg that the gate area 30 as a transition area between the straight channel piece of the pouring channel 20 and the inlet opening 35 over its entire length and for all embodiments of the gate walls e, f, g has the same cross-sectional area everywhere.
- the gate wall f (solid line) has the shape of an isosceles trapezoid and corresponds to the representation of the gate region 30 shown in FIG. 1.
- the gate wall e has a continuously inwardly curved shape and the gate wall g shows a continuously outside curved shape.
- FIG. 9 shows the top view of the embodiments of the gate region 30 of FIG. 1 shown in longitudinal section in FIG. 8 along the line A-A.
- the inlet opening 35 in turn remains unchanged for outer embodiments of the gate area 30.
- the gate walls e, f, g in the plan view according to FIG. 9 must have a larger cross-section, the smaller their cross-section in FIG Longitudinal section according to Figure 8. Accordingly, the gate wall e in FIG.
- the chamfer wall g has a more inward curvature than the chamfer wall f, so that its cross section is smaller everywhere in the top view shown in FIG. 9 compared to the chamfer wall f.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Continuous Casting (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Seal Device For Vehicle (AREA)
- Materials For Medical Uses (AREA)
- Slot Machines And Peripheral Devices (AREA)
- Air Bags (AREA)
- Devices For Dispensing Beverages (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/720,703 US6382302B1 (en) | 1998-07-30 | 1999-07-10 | Casting system for thixoforms |
EP99934657A EP1100640B1 (de) | 1998-07-30 | 1999-07-10 | Eingusssystem für das thixoformen |
DE59903037T DE59903037D1 (de) | 1998-07-30 | 1999-07-10 | Eingusssystem für das thixoformen |
AU50356/99A AU5035699A (en) | 1998-07-30 | 1999-07-10 | Casting system for thixoforms |
AT99934657T ATE225689T1 (de) | 1998-07-30 | 1999-07-10 | Eingusssystem für das thixoformen |
BR9912554-4A BR9912554A (pt) | 1998-07-30 | 1999-07-10 | Sistema de canal de entrada para tixoformação |
CA002338502A CA2338502A1 (en) | 1998-07-30 | 1999-07-10 | Casting system for thixoforms |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98810732.2 | 1998-07-30 | ||
EP98810732A EP0976475A1 (de) | 1998-07-30 | 1998-07-30 | Eingusssystem für die Herstellung von Formteilen aus thixotropen Metallbolzen in Druckgiessmaschinen |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000006323A1 true WO2000006323A1 (de) | 2000-02-10 |
Family
ID=8236222
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1999/004862 WO2000006323A1 (de) | 1998-07-30 | 1999-07-10 | Eingusssystem für das thixoformen |
Country Status (10)
Country | Link |
---|---|
US (1) | US6382302B1 (de) |
EP (2) | EP0976475A1 (de) |
AT (1) | ATE225689T1 (de) |
AU (1) | AU5035699A (de) |
BR (1) | BR9912554A (de) |
CA (1) | CA2338502A1 (de) |
DE (1) | DE59903037D1 (de) |
ES (1) | ES2181457T3 (de) |
PT (1) | PT1100640E (de) |
WO (1) | WO2000006323A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10133672B4 (de) * | 2000-07-11 | 2011-03-10 | Honda Giken Kogyo K.K. | Verfahren zum Spritzgießen metallischer Materialien |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10043717A1 (de) * | 2000-09-04 | 2002-03-14 | Buehler Druckguss Ag Uzwil | Verfahren und Vorrichtung zum Druckumformen von metallischen Werkstoffen |
US7331373B2 (en) * | 2005-01-14 | 2008-02-19 | Contech U.S., Llc | Semi-solid and squeeze casting process |
DE102009032320B4 (de) * | 2009-07-09 | 2019-12-12 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Verfahren zum Spritzgießen eines Bauteils |
US8327914B2 (en) * | 2009-11-06 | 2012-12-11 | National Research Council Of Canada | Feeding system for semi-solid metal injection |
US8376026B2 (en) * | 2010-01-29 | 2013-02-19 | National Research Council Of Canada | Thixotropic injector with improved annular trap |
DE102010053125A1 (de) * | 2010-12-01 | 2012-06-06 | Volkswagen Ag | Verfahren zum Herstellen einer Serie von Gussbauteilen und Vorrichtung zum Herstellen eines Gussbauteils |
DE102012107363A1 (de) * | 2011-09-16 | 2013-03-21 | Ksm Castings Group Gmbh | Dreiplattendruckgusswerkzeug mit Angusssystem sowie Angusssystem |
DE102012024926A1 (de) | 2012-12-19 | 2014-06-26 | Volkswagen Aktiengesellschaft | Gussvorichtung |
AT515969B1 (de) * | 2014-07-03 | 2019-08-15 | Ltc Gmbh | Vorrichtung und Verfahren zur Erstellung zumindest eines metallischen Bauteils |
CN108202136A (zh) * | 2016-12-19 | 2018-06-26 | 苏州汉扬精密电子有限公司 | 压铸模具的流道结构 |
US10040117B2 (en) | 2016-12-29 | 2018-08-07 | Vinet Micro-Technologies Inc. | Contaminant-purging cold chamber die casting apparatus and method |
CN110076316A (zh) * | 2019-05-26 | 2019-08-02 | 深圳市宝田精工塑胶模具有限公司 | 一种锌合金产品的成型方法及锌合金成型模具 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4015174A1 (de) * | 1990-05-11 | 1991-11-14 | Buehler Ag | Form zum spritz- oder druckgiessen und spritz- oder druckgiessmaschine mit einer solchen form |
JPH0768363A (ja) * | 1993-09-01 | 1995-03-14 | Leotec:Kk | 固液共存域ダイカスト用金型 |
EP0718059A1 (de) * | 1994-12-22 | 1996-06-26 | Alusuisse-Lonza Services AG | Oxidabstreifer |
DE19606806A1 (de) * | 1996-02-23 | 1997-08-28 | Kurt Dipl Ing Detering | Vorrichtung zum Thixoforming |
JPH10175054A (ja) * | 1996-12-18 | 1998-06-30 | Nissan Motor Co Ltd | 半溶融金属の成形金型及びこれを用いた成形方法 |
-
1998
- 1998-07-30 EP EP98810732A patent/EP0976475A1/de not_active Withdrawn
-
1999
- 1999-07-10 AT AT99934657T patent/ATE225689T1/de not_active IP Right Cessation
- 1999-07-10 BR BR9912554-4A patent/BR9912554A/pt active Search and Examination
- 1999-07-10 DE DE59903037T patent/DE59903037D1/de not_active Expired - Fee Related
- 1999-07-10 PT PT99934657T patent/PT1100640E/pt unknown
- 1999-07-10 US US09/720,703 patent/US6382302B1/en not_active Expired - Fee Related
- 1999-07-10 AU AU50356/99A patent/AU5035699A/en not_active Abandoned
- 1999-07-10 ES ES99934657T patent/ES2181457T3/es not_active Expired - Lifetime
- 1999-07-10 WO PCT/EP1999/004862 patent/WO2000006323A1/de active IP Right Grant
- 1999-07-10 EP EP99934657A patent/EP1100640B1/de not_active Expired - Lifetime
- 1999-07-10 CA CA002338502A patent/CA2338502A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4015174A1 (de) * | 1990-05-11 | 1991-11-14 | Buehler Ag | Form zum spritz- oder druckgiessen und spritz- oder druckgiessmaschine mit einer solchen form |
JPH0768363A (ja) * | 1993-09-01 | 1995-03-14 | Leotec:Kk | 固液共存域ダイカスト用金型 |
EP0718059A1 (de) * | 1994-12-22 | 1996-06-26 | Alusuisse-Lonza Services AG | Oxidabstreifer |
DE19606806A1 (de) * | 1996-02-23 | 1997-08-28 | Kurt Dipl Ing Detering | Vorrichtung zum Thixoforming |
JPH10175054A (ja) * | 1996-12-18 | 1998-06-30 | Nissan Motor Co Ltd | 半溶融金属の成形金型及びこれを用いた成形方法 |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 095, no. 006 31 July 1995 (1995-07-31) * |
PATENT ABSTRACTS OF JAPAN vol. 098, no. 011 30 September 1998 (1998-09-30) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10133672B4 (de) * | 2000-07-11 | 2011-03-10 | Honda Giken Kogyo K.K. | Verfahren zum Spritzgießen metallischer Materialien |
Also Published As
Publication number | Publication date |
---|---|
ATE225689T1 (de) | 2002-10-15 |
EP1100640A1 (de) | 2001-05-23 |
DE59903037D1 (de) | 2002-11-14 |
US6382302B1 (en) | 2002-05-07 |
AU5035699A (en) | 2000-02-21 |
EP0976475A1 (de) | 2000-02-02 |
ES2181457T3 (es) | 2003-02-16 |
PT1100640E (pt) | 2003-02-28 |
CA2338502A1 (en) | 2000-02-10 |
BR9912554A (pt) | 2001-05-02 |
EP1100640B1 (de) | 2002-10-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0718059B1 (de) | Oxidabstreifer | |
DE69814023T2 (de) | Schreckplatten-Entlüftungsventil für Druckgiessformen | |
DE69702984T2 (de) | Tauchgiessrohr zum stranggiessen von dünnbrammen | |
DE69610132T2 (de) | Druckgussverfahren | |
DE19650613B4 (de) | Bauteil mit einem Metallschaum-Kern | |
DE69806203T2 (de) | Kühlender Entlüfter | |
AT503824B1 (de) | Metallformkörper und verfahren zu dessen herstellung | |
EP1046444B1 (de) | Druckgiessverfahren | |
EP1100640B1 (de) | Eingusssystem für das thixoformen | |
DE60128114T2 (de) | Druckgiessen von aluminium | |
DE3490032T1 (de) | Verstärkungselement für Artikel aus gegossenem Metall oder gegossener Metallegierung sowie Verfahren seiner Herstellung | |
DE69110532T2 (de) | Verfahren und diesbezügliche Vorrichtung für indirektes Giessen von Knüppeln aus metallischen Legierungen im halbflüssigen oder pastösen Zustand. | |
DE69223178T2 (de) | Verfahren zur herstellung von gegossenen zusammengesetzten zylinderköpfen | |
DE60133466T2 (de) | Metallischer einsatzkörper, verfahren zur herstellung desselben und metallisches gussteil | |
DE102018113057A1 (de) | Werkzeug und verfahren zum direkten squeeze-casting | |
DE69916707T2 (de) | Verfahren und Vorrichtung zum Spritzgiessen halbflüssiger Metalle | |
DE69612707T2 (de) | Stranggiessverfahren für rostfreien austenitischen stahl | |
DE60000858T2 (de) | Verfahren und vorrichtung zum stranggiessen mit hoher geschwindigkeit | |
DE69809166T2 (de) | Verfahren zum Spritzgiessen einer Leichtmetalllegierung | |
DE112010001446B4 (de) | Verfahren zur Herstellung einer Zylinderlaufbuchse aus Metallmatrix-Verbundwerkstoffund Verfahren zur Herstellung derselben | |
DE10325819B4 (de) | Verfahren zur Herstellung eines Metallschaumkörpers | |
DE10342582B4 (de) | Herstellen eines Gradientenwerkstücks durch Schichtgießen | |
DE2929812C2 (de) | Rad für Kraftfahrzeuge | |
DE4006842A1 (de) | Bandgiessanlage mit oszillierender durchlaufkokille | |
DE3812740A1 (de) | Giess-schmiede-verfahren |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AU BR CA CZ HU IL JP MX NO PL RU SI US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1999934657 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 09720703 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 2338502 Country of ref document: CA Ref country code: CA Ref document number: 2338502 Kind code of ref document: A Format of ref document f/p: F |
|
WWP | Wipo information: published in national office |
Ref document number: 1999934657 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: CA |
|
WWG | Wipo information: grant in national office |
Ref document number: 1999934657 Country of ref document: EP |