EP1472027A1 - Apparatus and process for manufacturing items made of aluminum alloys or light alloys - Google Patents

Apparatus and process for manufacturing items made of aluminum alloys or light alloys

Info

Publication number
EP1472027A1
EP1472027A1 EP03737299A EP03737299A EP1472027A1 EP 1472027 A1 EP1472027 A1 EP 1472027A1 EP 03737299 A EP03737299 A EP 03737299A EP 03737299 A EP03737299 A EP 03737299A EP 1472027 A1 EP1472027 A1 EP 1472027A1
Authority
EP
European Patent Office
Prior art keywords
liquid metal
die
lower die
impression
male plug
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
EP03737299A
Other languages
German (de)
French (fr)
Other versions
EP1472027B1 (en
Inventor
Claudio Frulla
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.)
Esjotech Srl
Original Assignee
Esjotech Srl
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 Esjotech Srl filed Critical Esjotech Srl
Publication of EP1472027A1 publication Critical patent/EP1472027A1/en
Application granted granted Critical
Publication of EP1472027B1 publication Critical patent/EP1472027B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/08—Controlling, supervising, e.g. for safety reasons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
    • B22D2/003—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass for the level of the molten metal

Definitions

  • the present invention relates to an apparatus for manufacturing items made of aluminum, aluminum alloys, light alloys and the like.
  • a casting technique which is known as low-pressure casting, wherein the liquid metal is made to rise from the furnace through a duct for introducing the liquid metal that exits upward in a die formed by two or more parts.
  • the aim of the invention is indeed to solve the above problems, providing an apparatus for manufacturing items made of aluminum, aluminum alloys, light alloys and the like, which allows to cast items that have a very compact structure without however having to use a dosage device to introduce the liquid metal, which is instead in practice dosed automatically by the apparatus.
  • an object of the invention is to provide an apparatus that allows to produce items without sprue and with considerably shorter times for obtaining the solidification step.
  • Another object of the present invention is to provide an apparatus that can be obtained easily starting from commonly commercially available elements and materials and is also competitive from a merely economical standpoint.
  • an apparatus for manufacturing items made of aluminum, aluminum alloys, light alloys and the like comprising, on a platen, a lower die and at least one upper die, a duct for introducing liquid metal that is connected to a furnace, said liquid metal input duct arriving from below and leading into said lower die, characterized in that said lower die forms at least one lower impression, which has at least one concave portion for introducing a dosed quantity of liquid metal, a male plug being associated with said upper die, said male plug being adapted to move with respect to said upper die and forming at least one upper impression that can be coupled to said at least one lower impression in order to determine the shape of the item being cast, said at least one upper die being closable onto said lower die and said male plug closing said shape and acting as a flow control element for the port that provides a connection to said input duct.
  • Figure 1 is a schematic sectional view of the apparatus, taken along a vertical plane, during the initial step of casting;
  • Figure 2 is a view illustrating the step for introducing the liquid metal in the lower die
  • Figure 3 is a view illustrating the step for dosing the liquid metal
  • Figure 4 is a view illustrating the step for the closure of the upper die onto the lower die
  • Figure 5 is a schematic plan view of a die with three impressions
  • Figure 6 is a schematic view of a safety shoe toe cap that can be obtained with the apparatus according to the invention. Ways of carrying out the Invention
  • the apparatus for manufacturing items made of aluminum, aluminum alloys, light alloys and the like comprises a platen, generally designated by the reference numeral 1, on which there is a lower die 2 with which an upper die 3 cooperates; said upper die can perform a translational motion toward and away from the lower die.
  • duct 10 for introducing liquid metal which arrives from below from a furnace 11 of the liquid metal which is preferably of the pressurized type; the duct 10 runs through the platen, where there are usual heating means 12, until it exits at the impressions 20 provided in the lower die.
  • the level of the liquid metal is lowered again ( Figure 3), so as to provide precise dosage of the metal according to the position of the overflow ports 22 that form the region for the overflow of the liquid metal into the concave regions 23.
  • At least one male plug 8 is connected to the upper die 3, can move with respect to the upper die 3, and forms an upper impression 25, which in cooperation with the corresponding lower impression 20 forms the shape of the item being cast.
  • the specific example illustrates a toe cap 21 for safety shoes.
  • An important particularity of the invention consist in that after closing the upper die 3 onto the lower die 2 and after dosing the liquid metal, the piston 8, which moves with respect to the upper die 3, closes the port 24 for connection to the liquid metal input duct 10, thus achieving clear separation with respect to the column of liquid metal, which moreover, to perform dosage, had been made to descend in the channel 10, so as to place the free surface of the liquid preferably at the heated region.
  • the dosage of the metal is substantially produced by the shape of the lower impression and more particularly by the concave portion of the lower portion, allows to arrange around the same input channel impressions that are different one another and in which the liquid metal is always dosed correctly, said dosage being possibly different in each impression.
  • the male plug in practice forms a flow control element that closes the port for connection to the liquid metal input duct, avoiding the formation of sprue and also generating pressure on the liquid metal undergoing solidification, which helps to obtain a product with high-level structural and mechanical characteristics.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Conductive Materials (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Medicinal Preparation (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

An apparatus for manufacturing items made of aluminum, aluminum alloys, light alloys and the like, which comprises, on a platen (1), a lower die (2) and at least one upper die (3), a duct (10) for introducing liquid metal connected to a furnace, the liquid metal input duct (10) arriving from below and leading into the lower die (2) and the lower die (2) forming at least one lower impression (20), which has at least one concave portion (23) for introducing a dosed quantity of liquid metal, a male plug (8) associated with the upper die (3) and forming at least one upper impression (25) coupleable to the lower impression (20) to determine the shape of the item being cast. The upper die (3) is closed onto the lower die (2) and the male plug (8) closes the shape and acts as a flow control element for the port (24) that provides a connection to the liquid metal input duct (10).

Description

APPARATUS FOR MANUFACTURING ITEMS MADE OF ALUMINUM ALLOYS OR LIGHT ALLOYS
Technical Field
The present invention relates to an apparatus for manufacturing items made of aluminum, aluminum alloys, light alloys and the like. Background Art
As is known, for die-casting of items made of aluminum, aluminum alloys, light alloys and the like, a casting technique is used which is known as low-pressure casting, wherein the liquid metal is made to rise from the furnace through a duct for introducing the liquid metal that exits upward in a die formed by two or more parts.
Once the filling of the die has been completed, the liquid metal must solidify, and this occurs normally over a relatively long time, furthermore forming a relatively large sprue at the liquid metal input channel. This type of casting has the drawback of having long casting times in addition to a waste of material determined by the sprue and to the fact that the cast item has a structure that is relatively scarcely compacted, since casting occurs at low pressure.
According to what is disclosed in document WO 02/089625 by the same Applicant, assumed incorporated herein by reference, a casting technique is described which allows to produce items, particularly shoe toe caps, with a particularly compact structure that arises from the fact that the two parts of the die that form the impression of the cast item are mutually closed with a pressing action, thus achieving compaction of the material and considerable structural uniformity, furthermore avoiding the formation of sprue, with the consequent benefits regarding the casting time.
In this solution it was necessary to provide a relatively precise dosage of the liquid metal and it was therefore necessary to have a dosage device that allowed to introduce dosed quantities of material. Although this solution is valid in many respects, it was relatively complicated from a constructive standpoint. Disclosure of the Invention
The aim of the invention is indeed to solve the above problems, providing an apparatus for manufacturing items made of aluminum, aluminum alloys, light alloys and the like, which allows to cast items that have a very compact structure without however having to use a dosage device to introduce the liquid metal, which is instead in practice dosed automatically by the apparatus.
Within this aim, an object of the invention is to provide an apparatus that allows to produce items without sprue and with considerably shorter times for obtaining the solidification step.
Another object of the present invention is to provide an apparatus that allows to provide, with a single casting operation, a plurality of parts that may optionally be different one another, obtaining correct dosage for each cast part.
Another object of the present invention is to provide an apparatus that by virtue of its particular constructive characteristics is capable of giving the greatest assurances of reliability and safety in use.
Another object of the present invention is to provide an apparatus that can be obtained easily starting from commonly commercially available elements and materials and is also competitive from a merely economical standpoint.
This aim and these and other objects that will become better apparent hereinafter are achieved by an apparatus for manufacturing items made of aluminum, aluminum alloys, light alloys and the like, comprising, on a platen, a lower die and at least one upper die, a duct for introducing liquid metal that is connected to a furnace, said liquid metal input duct arriving from below and leading into said lower die, characterized in that said lower die forms at least one lower impression, which has at least one concave portion for introducing a dosed quantity of liquid metal, a male plug being associated with said upper die, said male plug being adapted to move with respect to said upper die and forming at least one upper impression that can be coupled to said at least one lower impression in order to determine the shape of the item being cast, said at least one upper die being closable onto said lower die and said male plug closing said shape and acting as a flow control element for the port that provides a connection to said input duct. Brief description of the Drawings
Further characteristics and advantages will become better apparent from the detailed description of an apparatus for manufacturing items made of aluminum, aluminum alloys, light alloys and the like, illustrated only by way of non-limitative example in the accompanying drawings, wherein:
Figure 1 is a schematic sectional view of the apparatus, taken along a vertical plane, during the initial step of casting;
Figure 2 is a view illustrating the step for introducing the liquid metal in the lower die; Figure 3 is a view illustrating the step for dosing the liquid metal;
Figure 4 is a view illustrating the step for the closure of the upper die onto the lower die;
Figure 5 is a schematic plan view of a die with three impressions;
Figure 6 is a schematic view of a safety shoe toe cap that can be obtained with the apparatus according to the invention. Ways of carrying out the Invention
With reference to the figures, the apparatus for manufacturing items made of aluminum, aluminum alloys, light alloys and the like, according to the invention, comprises a platen, generally designated by the reference numeral 1, on which there is a lower die 2 with which an upper die 3 cooperates; said upper die can perform a translational motion toward and away from the lower die.
There is also a duct 10 for introducing liquid metal, which arrives from below from a furnace 11 of the liquid metal which is preferably of the pressurized type; the duct 10 runs through the platen, where there are usual heating means 12, until it exits at the impressions 20 provided in the lower die.
In the illustrated specific example there are three lower impressions that are uniformly distributed circumferentially around the input duct 10 and are connected thereto by way of ports 22 that form in practice, as explained hereinafter, ports for the overflow of the liquid metal.
The lower impression 20 has at least one concave portion 23 that allows to introduce therein a quantity of liquid metal that is a direct function of the geometry of the concave portion; therefore, by introducing the liquid metal and making it rise through the duct, by virtue of a pressing action applied by the furnace, it is possible to fill the concave regions or portions 23 with a quantity of liquid metal that in practice is dosed.
It is possible to provide level sensors 30 to stop the rise of the liquid metal or it is optionally possible to preset the time and the pressure applied to the liquid metal so as to achieve dosed overflow of said liquid metal.
Once the concave regions have been filled, the level of the liquid metal is lowered again (Figure 3), so as to provide precise dosage of the metal according to the position of the overflow ports 22 that form the region for the overflow of the liquid metal into the concave regions 23. At least one male plug 8 is connected to the upper die 3, can move with respect to the upper die 3, and forms an upper impression 25, which in cooperation with the corresponding lower impression 20 forms the shape of the item being cast. The specific example illustrates a toe cap 21 for safety shoes. An important particularity of the invention consist in that after closing the upper die 3 onto the lower die 2 and after dosing the liquid metal, the piston 8, which moves with respect to the upper die 3, closes the port 24 for connection to the liquid metal input duct 10, thus achieving clear separation with respect to the column of liquid metal, which moreover, to perform dosage, had been made to descend in the channel 10, so as to place the free surface of the liquid preferably at the heated region.
The movement of the male plug 8 with respect to the upper die 3 applies pressure to the liquid metal, producing a particular compaction of said metal and thus obtaining parts that have considerable structural uniformity and improved mechanical strength.
It is also noted that the particular solution adopted, in which the dosage of the metal is substantially produced by the shape of the lower impression and more particularly by the concave portion of the lower portion, allows to arrange around the same input channel impressions that are different one another and in which the liquid metal is always dosed correctly, said dosage being possibly different in each impression.
It should be noted that with the arrangement described above it is possible to introduce in the various impressions a dosed quantity of liquid metal without having to resort to particular operations but simply by making the liquid metal that arrives from the input duct overflow and by bringing said liquid metal to a presettable limit that can be determined directly by a level sensor 30, as shown, or optionally by using the time for which pressure is applied to the liquid metal, said pressure causing its rise and consequently its introduction in the various recesses. It is evident from what has been described above that the invention achieves the intended aim and objects, and in particular the fact is stressed that the male plug in practice forms a flow control element that closes the port for connection to the liquid metal input duct, avoiding the formation of sprue and also generating pressure on the liquid metal undergoing solidification, which helps to obtain a product with high-level structural and mechanical characteristics.
The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims. All the details may further be replaced with other technically equivalent elements. In practice, the materials used, as well as the contingent shapes and dimensions, may be any according to requirements.
The disclosures in Italian Patent Application No. MI2002A000223 from which this application claims priority are incorporated herein by reference.

Claims

1. An apparatus for manufacturing items made of aluminum, aluminum alloys, light alloys and the like, comprising, on a platen (1), a lower die (2) and at least one upper die (3), a duct (10) for introducing liquid metal that is connected to a furnace (11), said liquid metal input duct (10) arriving from below and leading into said lower die (2), characterized in that said lower die
(2) forms at least one lower impression (20), which has at least one concave portion for introducing a dosed quantity of liquid metal, a male plug (8) being associated with said upper die (3), said male plug (8) being adapted to move with respect to said upper die (3) and forming an upper impression (25) that can be coupled to said at least one lower impression (20) in order to determine the shape of the item (21) being cast, said at least one upper die
(3) being closable onto said lower die (2) and said male plug (8) closing said shape and acting as a flow control element for the port (24) that provides a connection to said input duct (10).
2. The apparatus according to claim 1, characterized in that it comprises, on said lower die (2), multiple lower impressions (20) that are individually connected to said liquid metal input duct (10).
3. The apparatus according to the preceding claims, characterized in that it comprises level sensors (30) for controlling the rise of liquid metal in said input duct (10) to a level that is higher than the level of said connection port (24) to control the overflow of liquid metal.
4. The apparatus according to one or more of the preceding claims, characterized in that the dosage of said liquid metal occurs by overflowing with respect to said connection port (24).
5. The apparatus according to one or more of the preceding claims, characterized in that the level of the liquid metal in said liquid metal input duct (10) is controlled by setting time and pressure values inside said furnace.
6. The apparatus according to one ! or more of the preceding claims, characterized in that the closure of said male plug (8) onto the corresponding lower impression (20) of said lower die (2) is suitable to apply pressure to the liquid metal introduced in said concave portion.
7. The apparatus according to one or more of the preceding claims, characterized in that said lower impressions (20) formed in said lower die (2) are adapted to provide liquid metal dosages independently one from the other.
EP03737299A 2002-02-07 2003-01-31 Apparatus and process for manufacturing items made of aluminum alloys or light alloys Expired - Lifetime EP1472027B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT2002MI000223A ITMI20020223A1 (en) 2002-02-07 2002-02-07 EQUIPMENT FOR THE PRODUCTION OF ALUMINUM OBJECTS DIALUMINIUM ALLOYS LIGHT AND SIMILAR ALLOYS
ITMI20020223 2002-02-07
PCT/EP2003/001016 WO2003066254A1 (en) 2002-02-07 2003-01-31 Apparatus for manufacturing items made of aluminum alloys or light alloys

Publications (2)

Publication Number Publication Date
EP1472027A1 true EP1472027A1 (en) 2004-11-03
EP1472027B1 EP1472027B1 (en) 2005-12-28

Family

ID=11449131

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03737299A Expired - Lifetime EP1472027B1 (en) 2002-02-07 2003-01-31 Apparatus and process for manufacturing items made of aluminum alloys or light alloys

Country Status (11)

Country Link
EP (1) EP1472027B1 (en)
CN (1) CN1298462C (en)
AT (1) ATE314170T1 (en)
AU (1) AU2003244478A1 (en)
BR (1) BR0307545A (en)
DE (1) DE60303012T2 (en)
ES (1) ES2256755T3 (en)
HK (1) HK1077248A1 (en)
IT (1) ITMI20020223A1 (en)
TN (1) TNSN04144A1 (en)
WO (1) WO2003066254A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2080573A2 (en) 2007-12-21 2009-07-22 Solmar S.a.S. Apparatus for manufacturing metal articles, in particular of light alloy
WO2016185424A1 (en) * 2015-05-20 2016-11-24 Alustrategy S.R.L. Improvements relating to equipments for the manufacture of articles made of light alloy or similar
WO2018103789A1 (en) * 2016-12-05 2018-06-14 Schuler Pressen Gmbh Casting device, press and method for casting a component and component

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPD20020167A1 (en) * 2002-06-21 2003-12-22 Bbs Riva Spa EQUIPMENT FOR MAKING ALUMINUM OBJECTS, ALUMINUM ALLOYS, LIGHT AND SIMILAR ALLOYS, AND PROCEDURE IMPLEMENTED BY THAT EQUIPMENT
US20050167074A1 (en) * 2003-10-24 2005-08-04 Matteo Mongini Process and machine for producing metal alloy components
ITMI20032186A1 (en) * 2003-11-12 2005-05-13 Claudio Frulla EQUIPMENT FOR MOLDING OF ALUMINUM OBJECTS,
ITUB20152405A1 (en) * 2015-07-22 2017-01-22 Hydromec S R L PROCEDURE FOR THE CONSTRUCTION OF ALUMINUM OBJECTS, ALUMINUM ALLOYS, LIGHT ALLOYS, BRASS, BRONZE AND THE LIKE.
CN113523230B (en) * 2021-07-28 2022-06-24 威黎司模具技术（上海）有限公司 Zinc alloy die-casting mold for hot runner system

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CN2464482Y (en) * 2000-12-22 2001-12-12 中国科学院金属研究所 Mould for extruding casting thin wall hemisphere piece
ITMI20010949A1 (en) * 2001-05-09 2002-11-09 Claudio Frulla EQUIPMENT FOR THE REALIZATION OF TOE CAPS FOR SAFETY SHOES AND SIMILAR ALUMINUM ITS ALLOY AND LIGHT ALLOYS IN GENERAL AS WELL AS PR
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2080573A2 (en) 2007-12-21 2009-07-22 Solmar S.a.S. Apparatus for manufacturing metal articles, in particular of light alloy
US8210233B2 (en) 2007-12-21 2012-07-03 Solmar S.A.S. Apparatus for manufacturing metal articles, in particular of light alloy
WO2016185424A1 (en) * 2015-05-20 2016-11-24 Alustrategy S.R.L. Improvements relating to equipments for the manufacture of articles made of light alloy or similar
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US10556268B2 (en) 2015-05-20 2020-02-11 Alustrategy S.R.L. Improvements relating to equipment for the manufacture of articles made of light alloy or similar
WO2018103789A1 (en) * 2016-12-05 2018-06-14 Schuler Pressen Gmbh Casting device, press and method for casting a component and component

Also Published As

Publication number Publication date
ITMI20020223A0 (en) 2002-02-07
AU2003244478A1 (en) 2003-09-02
ITMI20020223A1 (en) 2003-08-07
CN1628005A (en) 2005-06-15
CN1298462C (en) 2007-02-07
BR0307545A (en) 2005-01-04
EP1472027B1 (en) 2005-12-28
WO2003066254A1 (en) 2003-08-14
HK1077248A1 (en) 2006-02-10
TNSN04144A1 (en) 2007-03-12
DE60303012T2 (en) 2006-07-20
DE60303012D1 (en) 2006-02-02
ATE314170T1 (en) 2006-01-15
ES2256755T3 (en) 2006-07-16

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