EP1420911A2 - Die particularly for on-road vehicle wheels - Google Patents

Die particularly for on-road vehicle wheels

Info

Publication number
EP1420911A2
EP1420911A2 EP02758341A EP02758341A EP1420911A2 EP 1420911 A2 EP1420911 A2 EP 1420911A2 EP 02758341 A EP02758341 A EP 02758341A EP 02758341 A EP02758341 A EP 02758341A EP 1420911 A2 EP1420911 A2 EP 1420911A2
Authority
EP
European Patent Office
Prior art keywords
die
wheel
furnace
filling
filling material
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
EP02758341A
Other languages
German (de)
French (fr)
Other versions
EP1420911B1 (en
Inventor
Heinrich Georg Baumgartner
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.)
BBS-RIVA SpA
Original Assignee
BBS Riva SpA
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 BBS Riva SpA filed Critical BBS Riva SpA
Publication of EP1420911A2 publication Critical patent/EP1420911A2/en
Application granted granted Critical
Publication of EP1420911B1 publication Critical patent/EP1420911B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/22—Moulds for peculiarly-shaped castings
    • B22C9/28—Moulds for peculiarly-shaped castings for wheels, rolls, or rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
    • B22C9/088—Feeder heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
    • B22D15/005—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor of rolls, wheels or the like

Definitions

  • the present invention relates to a die particularly for on-road vehicle wheels.
  • light alloy wheels produced by low-pressure die casting are formed by means of a shell-type die in which the filling material is fed from the center of the die at the center of the impression that forms the shape of the wheel.
  • the die is fixed to a hydraulic press for the opening and closing actions.
  • a pressurized furnace that contains the alloy in the liquid state, which is introduced at low pressure into the center of the die through a riser, and a PLC (electronic controller) that controls all the steps of its filling electronically.
  • the die is filled for a machine cycle time that varies between five and six minutes and comprises in succession the steps of filling, feeding, cooling, solidification, forming and preparation of the die for the next wheel.
  • Feeding from the center of the wheel produces a uniform distribution of material, causes no turbulence problems and provides a good feed when the wheel is small and has a very simple design.
  • the aim of the present invention is to provide a die particularly for on- road vehicle wheels that solves or reduces substantially the problems of known die types.
  • an object of the present invention is to provide a die by virtue of which the feeding step is improved.
  • Another object is to provide a die that allows to form wheels with few porosity defects that are visible under X rays.
  • Another object is to provide a die that allows to obtain a wheel that has high alloy uniformity.
  • Another object is to provide a die that allows to form a wheel that has improved mechanical characteristics.
  • Another object is to provide a die by means of which the machine cycle time is reduced, particularly with reference to the filling, feeding and solidification steps.
  • Another object is to provide a die that has a simple structure and can be manufactured with conventional systems and technologies.
  • a die particularly for on-road vehicle wheels of the type that comprises lower, upper and lateral die parts that form an impression to be filled with molten material, characterized in that it comprises at least two die filling points arranged at two openings of the design of the wheel where the lower die part and the upper die part are in contact when the die is in the closed configuration.
  • Figures 1 and 2 are transverse sectional views of two embodiments of die particularly for forming on-road vehicle wheels, according to the invention
  • Figure 3 is a plan view of the lid of the furnace for the embodiment shown in Figure 2;
  • Figures 4 and 5 are respectively a plan view and a transverse sectional view of the lower part of a die having the structure according to the invention
  • Figures 6 and 7 are plan views of the two components that constitute the upper part of the die. Ways to carrying out the Invention With reference to Figure 1, a die particularly for on-road vehicle wheels having the structure according to the invention, in a first embodiment, is generally designated by the reference numeral 10.
  • the die 10 comprises a lower die part (bottom) 11, which is arranged above a pressurized furnace generally designated by the reference numeral 12, an upper die part (male plug) 13, and lateral die parts 14 that have an overall annular shape and form, when they are in the closed configuration, an impression into which the alloy in the liquid state is to be injected to form a wheel, generally designated by the reference numeral 15.
  • the upper die part 13 comprises a central body 13a to be fixed to an annular body 13b; the bodies are shaped in a downward region so as to form the rear shape of the wheel 15.
  • the lower die part 11 is instead constituted by a single body that is shaped in an upward region so as to form the front shape of the wheel 15.
  • the die 10 comprises two filling points, described in greater detail hereinafter, which are arranged at two openings 17 of the design of the wheel 15, where the lower die part 11 and the upper die part 13 are in contact when the die 10 is in the closed configuration.
  • the filling points are formed by passages for the filling material that arrives from the furnace 12, which are constituted by through holes 16 of the lower die part 11, which are arranged at two spaced openings
  • the ducts are constituted by channels 19, which are arranged below the lower die part 11, one for each through hole 16, and are connected to a common riser 20, which is in turn connected to the furnace 12.
  • the channels 19 run radially from the upper end of the riser 20, which is arranged in a central region below the die 10, with a substantially vertical end portion 19a that ends at the through holes 16.
  • the upper die part 13 has, at the through holes 16 of the lower die part 11, cavities 21 that are substantially radial with respect to the wheel 15 and form inlets for the filling material at the center and at the outer rim of the wheel 15.
  • Figure 2 illustrates a die for on-road vehicle wheels according to the invention in a second embodiment, generally designated by the reference numeral 110.
  • the die 110 has a lower die part 111, an upper die part 113, and lateral die parts 114 that are substantially identical to those of the die 10. The difference lies in the fact that the die 110 comprises two risers 120 that are connected to the pressurized furnace 112, one for each through hole 116 of the lower die part 111.
  • the risers 120 are thus for example fed directly by the pressurized furnace 112.
  • the die 10/110 is used to form a wheel 15 by means of a processing cycle that comprises the steps of filling, feeding, cooling, solidification, forming and finally preparation of the die for the next wheel.
  • inlets for the filling material at the openings 17 of the design of the wheel allows to dose the material simultaneously at the center of the wheel and at the outer rim.
  • the material is distributed very uniformly, avoiding turbulence problems and achieving good distribution thereof.
  • the machine cycle time is reduced considerably, with particular reference to the reduction of the die filling time, the feeding time and the solidification time. If instead the die comprises a plurality of risers fed directly by the pressurized furnace, in addition to the above-described advantages, which relate to the first embodiment, there is a further reduction in machine cycle time and a reduction in die preparation time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Abstract

A die particularly for on-road vehicle wheels, of the type that comprises lower, upper and lateral die parts that form an impression to be filled with molten material, comprising at least two die filling points arranged at two openings of the design of a wheel where the lower die part and the upper die part are in contact when the die is in the closed configuration.

Description

DIE PARTICULARLY FOR ON-ROAD VEHICLE WHEELS Technical Field
The present invention relates to a die particularly for on-road vehicle wheels. Background Art
Currently, light alloy wheels produced by low-pressure die casting are formed by means of a shell-type die in which the filling material is fed from the center of the die at the center of the impression that forms the shape of the wheel. The die is fixed to a hydraulic press for the opening and closing actions.
Below the die supporting bed a pressurized furnace is provided that contains the alloy in the liquid state, which is introduced at low pressure into the center of the die through a riser, and a PLC (electronic controller) that controls all the steps of its filling electronically. The die is filled for a machine cycle time that varies between five and six minutes and comprises in succession the steps of filling, feeding, cooling, solidification, forming and preparation of the die for the next wheel.
Feeding from the center of the wheel produces a uniform distribution of material, causes no turbulence problems and provides a good feed when the wheel is small and has a very simple design.
However, when the wheel design is particularly complicated in terms of shape and thickness, porosities can be generated and are visible under X rays.
Usually these porosities form due to poor feeding as a consequence of turbulent motions of the alloy and overheatings. Disclosure of the Invention
The aim of the present invention is to provide a die particularly for on- road vehicle wheels that solves or reduces substantially the problems of known die types. Within this aim, an object of the present invention is to provide a die by virtue of which the feeding step is improved.
Another object is to provide a die that allows to form wheels with few porosity defects that are visible under X rays.
Another object is to provide a die that allows to obtain a wheel that has high alloy uniformity.
Another object is to provide a die that allows to form a wheel that has improved mechanical characteristics.
Another object is to provide a die by means of which the machine cycle time is reduced, particularly with reference to the filling, feeding and solidification steps.
Another object is to provide a die that has a simple structure and can be manufactured with conventional systems and technologies.
This aim and these and other objects that will become better apparent hereinafter are achieved by a die particularly for on-road vehicle wheels, of the type that comprises lower, upper and lateral die parts that form an impression to be filled with molten material, characterized in that it comprises at least two die filling points arranged at two openings of the design of the wheel where the lower die part and the upper die part are in contact when the die is in the closed configuration. Brief description of the drawings
Further characteristics and advantages of the present invention will become better apparent from the following detailed description of some embodiments thereof, illustrated only by way of non-limitative example in the accompanying drawings, wherein: Figures 1 and 2 are transverse sectional views of two embodiments of die particularly for forming on-road vehicle wheels, according to the invention;
Figure 3 is a plan view of the lid of the furnace for the embodiment shown in Figure 2;
Figures 4 and 5 are respectively a plan view and a transverse sectional view of the lower part of a die having the structure according to the invention;
Figures 6 and 7 are plan views of the two components that constitute the upper part of the die. Ways to carrying out the Invention With reference to Figure 1, a die particularly for on-road vehicle wheels having the structure according to the invention, in a first embodiment, is generally designated by the reference numeral 10.
The die 10 comprises a lower die part (bottom) 11, which is arranged above a pressurized furnace generally designated by the reference numeral 12, an upper die part (male plug) 13, and lateral die parts 14 that have an overall annular shape and form, when they are in the closed configuration, an impression into which the alloy in the liquid state is to be injected to form a wheel, generally designated by the reference numeral 15.
The upper die part 13 comprises a central body 13a to be fixed to an annular body 13b; the bodies are shaped in a downward region so as to form the rear shape of the wheel 15.
The lower die part 11 is instead constituted by a single body that is shaped in an upward region so as to form the front shape of the wheel 15.
The die 10 comprises two filling points, described in greater detail hereinafter, which are arranged at two openings 17 of the design of the wheel 15, where the lower die part 11 and the upper die part 13 are in contact when the die 10 is in the closed configuration.
In practice, the filling points are formed by passages for the filling material that arrives from the furnace 12, which are constituted by through holes 16 of the lower die part 11, which are arranged at two spaced openings
17a of the design of the wheel 15 and at which ducts, described in greater detail hereinafter and connected to the furnace 12, end.
The ducts are constituted by channels 19, which are arranged below the lower die part 11, one for each through hole 16, and are connected to a common riser 20, which is in turn connected to the furnace 12. The channels 19 run radially from the upper end of the riser 20, which is arranged in a central region below the die 10, with a substantially vertical end portion 19a that ends at the through holes 16.
The upper die part 13 has, at the through holes 16 of the lower die part 11, cavities 21 that are substantially radial with respect to the wheel 15 and form inlets for the filling material at the center and at the outer rim of the wheel 15.
At the cavities 21, the upper die part 13 is further provided with fixed redirection elements 22 for the incoming molten material. Figure 2 illustrates a die for on-road vehicle wheels according to the invention in a second embodiment, generally designated by the reference numeral 110.
The die 110 has a lower die part 111, an upper die part 113, and lateral die parts 114 that are substantially identical to those of the die 10. The difference lies in the fact that the die 110 comprises two risers 120 that are connected to the pressurized furnace 112, one for each through hole 116 of the lower die part 111.
The risers 120 are thus for example fed directly by the pressurized furnace 112. As regards operation, the die 10/110 is used to form a wheel 15 by means of a processing cycle that comprises the steps of filling, feeding, cooling, solidification, forming and finally preparation of the die for the next wheel.
The presence of inlets for the filling material at the openings 17 of the design of the wheel allows to dose the material simultaneously at the center of the wheel and at the outer rim.
Accordingly, the material is distributed very uniformly, avoiding turbulence problems and achieving good distribution thereof.
If there is a central riser from which radial channels connected to the through holes of the lower die part branch out, a good feed of the filling material, few X-ray porosity defects, alloy uniformity and good mechanical characteristics of the finished product are obtained.
Moreover, the machine cycle time is reduced considerably, with particular reference to the reduction of the die filling time, the feeding time and the solidification time. If instead the die comprises a plurality of risers fed directly by the pressurized furnace, in addition to the above-described advantages, which relate to the first embodiment, there is a further reduction in machine cycle time and a reduction in die preparation time.
In practice it has been observed that the present invention has achieved the intended aim and objects.
The present invention is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims.
The technical details can be replaced with other technically equivalent elements. The materials, so long as they are compatible with the contingent use, as well as the dimensions, may be any according to requirements.
The disclosures in Italian Patent Application No. PD2001A000208 from which this application claims priority are incorporated herein by reference.

Claims

1. A die particularly for on-road vehicle wheels, of the type that comprises lower, upper and lateral die parts that form an impression to be filled with molten material, characterized in that it comprises at least two die filling points arranged at two openings of the design of a wheel where the lower die part and the upper die part are in contact when the die is in the closed configuration.
2. The die according to claim 1, characterized in that at said filling points said lower and upper die parts are shaped so as to form passages for the filling material.
3. The die according to the claim 1, characterized in that said lower die part is arranged above a furnace and is provided with through holes, at said filling points, for the passage of the filling material that arrives from ducts connected to said furnace.
4. The die according to claim 3, characterized in that said ducts are constituted by risers, one for each through hole, which are fed by said furnace.
5. The die according to claim 3, characterized in that said ducts are constituted by channels, one for each through hole, that protrude from a common riser fed by said furnace.
6. The die according to claim 5, characterized in that said channels lie radially starting from the upper end of said common riser, which is arranged in a substantially central region below said die, with an end portion that is substantially vertical and ends at said through holes of the lower die part.
7. The die according to claim 3, characterized in that said upper die part has, above said through holes of the lower die part, cavities that allow the inflow of the filling material that arrives from said ducts into the impression formed between the two die parts with the die in the closed configuration.
8. The die according to claim 7, characterized in that said cavities are substantially radial with respect to the wheel, forming inlets for the filling material at the center and at the outer rim of said wheel.
9. The die according to claim 8, characterized in that said upper die part has redirection elements for the filling material at said cavities, above said through holes of the lower die part.
EP02758341A 2001-08-28 2002-07-15 Die particularly for on-road vehicle wheels Expired - Lifetime EP1420911B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITPD20010208 2001-08-28
IT2001PD000208A ITPD20010208A1 (en) 2001-08-28 2001-08-28 MOLD STRUCTURE PARTICULARLY FOR ROAD VEHICLE RIMS
PCT/EP2002/007844 WO2003020459A2 (en) 2001-08-28 2002-07-15 Die particularly for on-road vehicle wheels

Publications (2)

Publication Number Publication Date
EP1420911A2 true EP1420911A2 (en) 2004-05-26
EP1420911B1 EP1420911B1 (en) 2007-03-21

Family

ID=11452447

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02758341A Expired - Lifetime EP1420911B1 (en) 2001-08-28 2002-07-15 Die particularly for on-road vehicle wheels

Country Status (11)

Country Link
US (1) US20040194906A1 (en)
EP (1) EP1420911B1 (en)
JP (1) JP2005501721A (en)
CN (1) CN1277633C (en)
AT (1) ATE357301T1 (en)
AU (1) AU2002325326A1 (en)
DE (1) DE60219032T2 (en)
ES (1) ES2283584T3 (en)
IT (1) ITPD20010208A1 (en)
PL (1) PL366788A1 (en)
WO (1) WO2003020459A2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4163462B2 (en) * 2002-07-29 2008-10-08 旭テック株式会社 Mold for casting
CN100348345C (en) * 2006-04-06 2007-11-14 佛山市南海奔达模具有限公司 Side mold for gravitational casting of automobile hub
CN102029377B (en) * 2010-12-08 2013-10-30 何丙军 Low-pressure casting die of aluminium alloy wheel and casting method thereof
CN102152124A (en) * 2011-02-23 2011-08-17 河南省宏源车轮有限公司 Process for manufacturing outer rim for wheel type tubeless engineering machinery wheel
DE102011110176B4 (en) * 2011-08-12 2013-06-06 Heinrich G. Baumgartner Die casting machine and die casting process
DE102016104019B3 (en) * 2016-03-06 2017-03-30 Argirov ARCONTEC GmbH Apparatus for producing castings, such as cast aluminum, by die casting or low pressure casting
CN105935761B (en) * 2016-06-15 2018-09-28 中信戴卡股份有限公司 A kind of Low Pressure Die Casting of Aluminum Wheel Hub bed die
PL3330020T3 (en) * 2016-12-05 2022-02-07 Mubea Performance Wheels Gmbh Casting device and casting method
CN107186198A (en) * 2017-06-22 2017-09-22 中信戴卡股份有限公司 A kind of plunger for strengthening the cooling of spoke root R angles

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JPS6415257A (en) * 1987-07-07 1989-01-19 Nippon Light Metal Co Die casting method for light alloy-made wheel
EP0722795B1 (en) * 1988-07-31 1998-11-25 Asahi Tec Corporation Method and device for casting vehicle wheels
GB2253171B (en) * 1991-02-27 1994-08-24 Honda Motor Co Ltd Method of casting vehicle wheel
US5309975A (en) * 1991-10-22 1994-05-10 Hitachi Metals, Ltd. Differential pressure casting process
WO1996027467A1 (en) * 1995-03-06 1996-09-12 Asahi Tec Corporation Pressure casting device for automobile wheels
JP2001071115A (en) * 1999-08-31 2001-03-21 Asahi Tec Corp Mold device of wheel for vehicle
US6401797B1 (en) * 1999-12-22 2002-06-11 Hayes Lammerz International, Inc. Mold and method for casting a vehicle wheel
DE10004714C2 (en) * 2000-02-03 2002-03-14 Karl Walter Formen Fa Device for casting a molded part

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Title
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Also Published As

Publication number Publication date
CN1277633C (en) 2006-10-04
WO2003020459A2 (en) 2003-03-13
DE60219032T2 (en) 2007-11-22
AU2002325326A1 (en) 2003-03-18
WO2003020459A3 (en) 2003-10-09
EP1420911B1 (en) 2007-03-21
ATE357301T1 (en) 2007-04-15
DE60219032D1 (en) 2007-05-03
JP2005501721A (en) 2005-01-20
ITPD20010208A1 (en) 2003-02-28
US20040194906A1 (en) 2004-10-07
PL366788A1 (en) 2005-02-07
ES2283584T3 (en) 2007-11-01
CN1549754A (en) 2004-11-24

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