EP1420911B1 - Die particularly for on-road vehicle wheels - Google Patents
Die particularly for on-road vehicle wheels Download PDFInfo
- Publication number
- EP1420911B1 EP1420911B1 EP02758341A EP02758341A EP1420911B1 EP 1420911 B1 EP1420911 B1 EP 1420911B1 EP 02758341 A EP02758341 A EP 02758341A EP 02758341 A EP02758341 A EP 02758341A EP 1420911 B1 EP1420911 B1 EP 1420911B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- die
- wheel
- furnace
- filling
- die part
- 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.)
- Expired - Lifetime
Links
Images
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.
- PLC electronic controller
- 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 with each other when the die is in the closed configuration.
- 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 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.
- 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 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.
- 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.
- the materials may be any according to requirements.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
Abstract
Description
- The present invention relates to a die particularly for on-road vehicle wheels.
- 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.
- 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 with each other when the die is in the closed configuration.
- 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 a 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.
- 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, andlateral 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 thereference numeral 15. - The
upper die part 13 comprises acentral body 13a to be fixed to anannular body 13b; the bodies are shaped in a downward region so as to form the rear shape of thewheel 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 thewheel 15. - The die 10 comprises two filling points, described in greater detail hereinafter, which are arranged at two
openings 17 of the design of thewheel 15, where thelower die part 11 and theupper die part 13 are in contact when thedie 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 throughholes 16 of thelower die part 11, which are arranged at two spacedopenings 17a of the design of thewheel 15 and at which ducts, described in greater detail hereinafter and connected to thefurnace 12, end. - The ducts are constituted by
channels 19, which are arranged below thelower die part 11, one for each throughhole 16, and are connected to acommon riser 20, which is in turn connected to thefurnace 12. - The
channels 19 run radially from the upper end of theriser 20, which is arranged in a central region below thedie 10, with a substantiallyvertical end portion 19a that ends at thethrough holes 16. - The
upper die part 13 has, at thethrough holes 16 of thelower die part 11,cavities 21 that are substantially radial with respect to thewheel 15 and form inlets for the filling material at the center and at the outer rim of thewheel 15. - At the
cavities 21, theupper die part 13 is further provided withfixed 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, anupper die part 113, andlateral 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 thepressurized furnace 112, one for each through hole 116 of thelower die part 111. - The
risers 120 are thus for example fed directly by the pressurizedfurnace 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.
Claims (9)
- A die (10; 110) particularly for on-road vehicle wheels, of the type that comprises lower (11; 111), upper (13; 113) and lateral (14; 114) die parts that form an impression (15) to be filled with molten material, characterized in that it comprises at least two die filling points arranged at two openings (17) of the design of the wheel where the lower die part and the upper die part are in contact with each other when the die is in the closed configuration.
- The die (10; 110) according to claim 1, characterized in that at said filling points said lower (11; 111) and upper (13; 113) die parts are shaped so as to form passages (16, 21) for the filling material.
- The die (10; 110) according to claim 1, characterized in that said lower die part (11; 111) is arranged above a furnace (12; 112) and is provided with through holes (16), at said filling points, for the passage of the filling material that arrives from ducts (20, 19; 120) connected to said furnace.
- The die (110) according to claim 3, characterized in that said ducts are constituted by risers (120), one for each through hole (16), which are fed by said furnace (112).
- The die (10) according to claim 3, characterized in that said ducts are constituted by channels (19), one for each through hole (16), that protrude from a common riser (20) fed by said furnace (12).
- The die (10) according to claim 5, characterized in that said channels (19) lie radially starting from the upper end of said common riser (20), which is arranged in a substantially central region below said die, with an end portion (19a) that is substantially vertical and ends at said through holes (16) of the lower die part (11).
- The die (10;110) according to claim 3, characterized in that said upper die part (13; 113) has, above said through holes (16) of the lower die part (11; 111), cavities (21) that allow the inflow of the filling material that arrives from said ducts (20, 19; 120) into the impression (15) formed between the two die parts with the die in the closed configuration.
- The die (10; 110) according to claim 7, characterized in that said cavities (21) 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.
- The die (10; 110) according to claim 8, characterized in that said upper die part (13; 113) has redirection elements (22) for the filling material at said cavities (21), above said through holes (16) of the lower die part (11; 111).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2001PD000208A ITPD20010208A1 (en) | 2001-08-28 | 2001-08-28 | MOLD STRUCTURE PARTICULARLY FOR ROAD VEHICLE RIMS |
ITPD20010208 | 2001-08-28 | ||
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 EP1420911A2 (en) | 2004-05-26 |
EP1420911B1 true 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) |
Families Citing this family (9)
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 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2015052B3 (en) * | 1986-03-03 | 1990-08-01 | Ube Industries | VERTICAL DIE CUTTING MACHINE. |
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 |
DE69609910T2 (en) * | 1995-03-06 | 2001-04-12 | Asahi Tec Corp., Shizuoka | Low pressure casting machine for vehicle 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 |
-
2001
- 2001-08-28 IT IT2001PD000208A patent/ITPD20010208A1/en unknown
-
2002
- 2002-07-15 WO PCT/EP2002/007844 patent/WO2003020459A2/en active IP Right Grant
- 2002-07-15 EP EP02758341A patent/EP1420911B1/en not_active Expired - Lifetime
- 2002-07-15 PL PL02366788A patent/PL366788A1/en unknown
- 2002-07-15 CN CN02817152.7A patent/CN1277633C/en not_active Expired - Fee Related
- 2002-07-15 AT AT02758341T patent/ATE357301T1/en not_active IP Right Cessation
- 2002-07-15 ES ES02758341T patent/ES2283584T3/en not_active Expired - Lifetime
- 2002-07-15 DE DE60219032T patent/DE60219032T2/en not_active Expired - Fee Related
- 2002-07-15 US US10/485,344 patent/US20040194906A1/en not_active Abandoned
- 2002-07-15 JP JP2003524755A patent/JP2005501721A/en active Pending
- 2002-07-15 AU AU2002325326A patent/AU2002325326A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
PL366788A1 (en) | 2005-02-07 |
WO2003020459A3 (en) | 2003-10-09 |
CN1549754A (en) | 2004-11-24 |
WO2003020459A2 (en) | 2003-03-13 |
US20040194906A1 (en) | 2004-10-07 |
ATE357301T1 (en) | 2007-04-15 |
DE60219032T2 (en) | 2007-11-22 |
ES2283584T3 (en) | 2007-11-01 |
CN1277633C (en) | 2006-10-04 |
AU2002325326A1 (en) | 2003-03-18 |
JP2005501721A (en) | 2005-01-20 |
ITPD20010208A1 (en) | 2003-02-28 |
EP1420911A2 (en) | 2004-05-26 |
DE60219032D1 (en) | 2007-05-03 |
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