US20030173053A1 - Device for producing castings that comprises a wall can be guided into the casting mold - Google Patents
Device for producing castings that comprises a wall can be guided into the casting mold Download PDFInfo
- Publication number
- US20030173053A1 US20030173053A1 US10/070,565 US7056502A US2003173053A1 US 20030173053 A1 US20030173053 A1 US 20030173053A1 US 7056502 A US7056502 A US 7056502A US 2003173053 A1 US2003173053 A1 US 2003173053A1
- Authority
- US
- United States
- Prior art keywords
- mold
- chamber
- movable
- walls
- wall
- 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.)
- Abandoned
Links
- 238000005266 casting Methods 0.000 title claims abstract description 22
- 238000002347 injection Methods 0.000 claims abstract description 31
- 239000007924 injection Substances 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 26
- 238000007789 sealing Methods 0.000 claims description 11
- 230000009969 flowable effect Effects 0.000 abstract 1
- 239000007858 starting material Substances 0.000 abstract 1
- 238000004512 die casting Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Images
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2015—Means for forcing the molten metal into the die
-
- 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
Definitions
- the invention relates to a device according to the preamble of claim 1.
- European Patent 1 046 444 A1 discloses a device of this type according to the species.
- Three pistons are used to create a variable-volume chamber for the injection material.
- two pistons are axially movable within a tubular cavity, and a third piston can be moved perpendicularly to the longitudinal axis of the chamber between the two above-mentioned pistons so as to convey the material into the mold cavity.
- the requirement here is that there be a precise seal between the three pistons relative to one another and to the chamber. Because of the space requirement and the demands on the seal, the device according to the species is very expensive to produce.
- German Patent 43 10 755 A1 describes a device in which two walls, one designed as a nondriven movable clamping disk and the other as a driven piston, are axially movable within a tubular cavity. They adjoin a runner through which the injection material enters the actual mold cavity.
- the goal of the present invention is to improve a device according to the species so that it is as efficient as possible, has compact dimensions, and can be operated as inexpensively as possible.
- the invention proposes an approach in which the movable chamber walls are located not exclusively outside the mold but are disposed to allow displacement of the chamber contents into the mold.
- This approach results in a savings in material since the sprue can be avoided or considerably reduced.
- a reduction can be made in the quantity of material in circulation which must be re-cooled and re-melted for each cycle, with the possible ensuing melting loss in expensive alloy elements, this melting loss having to be continually replaced.
- One of the two movable walls of the injection unit chamber may be advantageously designed as the section of the wall of the mold cavity which is designed to be movable for the purpose of opening the mold. This approach avoids complex multi-axial movements and ensures that, when the mold is opened, this injection unit wall, which is movable into the casting mold, is moved together with the section of the mold to he opened—thereby allowing the access to the casting when the mold is opened to remain unchanged and allowing optimal access to the casting for its removal.
- Reference 1 in FIG. 1 designates a device for producing castings in a pressure die-casting process.
- a conveying unit 4 conveys the molten or at least partially molten material into a chamber 5 of injection unit 3 .
- the chamber walls are formed by a round tube 6 , an injection piston 7 , and a sealing piston 8 .
- the volume of chamber 5 is comparatively small.
- the chamber volume can be kept to an extreme minimum by moving the two pistons 7 and 8 very close together. There is assurance at all times that even oxidation-prone material can be readily processed since any contact with ambient air is essentially precluded.
- the material is conveyed by conveying unit 4 into chamber 5 , while sealing piston 8 is increasingly moved away from injection piston 7 to adjust for the quantity of admitted material, as FIG. 2 shows.
- FIG. 2 shows injection unit 3 in an end phase of filling when injection unit 3 is essentially filled with the casting material.
- the volume of chamber 5 has increased accordingly, and injection piston 7 continues to be situated at a position in which the access for conveying unit 4 into chamber 5 is open.
- Sealing piston 8 is moved out of tube 6 and into mold 2 . This action opens tube 6 and thus, chamber 5 . A further movement of injection piston 7 causes the material to be injected from chamber 5 into mold 2 .
- mold 2 is open.
- mold 2 consists of a fixed mold section 10 and another movable mold section 11 .
- Sealing piston 8 is supported within the movable mold section 11 and is movable together with or separately from movable mold section 11 such that, after mold 2 is opened, the casting can be removed easily and with the same accessibility as with a conventional injection unit in which all the components are located outside mold 2 .
- mold 2 is closed, i.e., the movable section 11 is moved completely against fixed mold section 10 after which the backplates of mold 2 are locked so that it is ready to receive the injection pressures.
- sealing piston 8 is allowed to rest against movable mold section 11 during the injection procedure—with the result that, advantageously, no expensive and design-specific provision has to be made in terms of a separate support for sealing piston 8 since the injection pressures acting on sealing piston 8 are accommodated by mold 2 or its backplates.
- chamber 5 is displaced by a movement of the same direction and speed effected by pistons 7 and 8 until chamber 5 is situated in front of the opening of conveying unit 4 so that a new operating cycle can take place.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a device for producing castings from flowable or strewable starting material. Said device comprises an injection unit, out of which the at least partially liquefied material can be injected into a casting mold. The injection unit has an inlet opening for supplying the material, and the injection unit has a chamber with two moveable walls. These walls can either be moved together in one direction or in opposite directions in such a manner that the volume of the interior of the chamber can be altered as desired and/or the interior of the chamber can he displaced, whereby one or both walls form a portion of the wall delimiting the mold cavity. The invention provides that both walls each form a portion of the wall delimiting the mold cavity, whereby one of the walls can be guided into the casting mold.
Description
- The invention relates to a device according to the preamble of
claim 1. -
European Patent 1 046 444 A1 discloses a device of this type according to the species. Three pistons are used to create a variable-volume chamber for the injection material. In it, two pistons are axially movable within a tubular cavity, and a third piston can be moved perpendicularly to the longitudinal axis of the chamber between the two above-mentioned pistons so as to convey the material into the mold cavity. The requirement here is that there be a precise seal between the three pistons relative to one another and to the chamber. Because of the space requirement and the demands on the seal, the device according to the species is very expensive to produce. - German Patent 199 14 830 A1 describes a device in which two walls designed as a valve and a piston are axially movable within the tubular cavity. They adjoin a runner through which the injection material enters the actual mold cavity.
- German Patent 43 10 755 A1 describes a device in which two walls, one designed as a nondriven movable clamping disk and the other as a driven piston, are axially movable within a tubular cavity. They adjoin a runner through which the injection material enters the actual mold cavity.
- Replaceable mold inserts which may form sections of the wall of the mold cavity are known from Ernst Brunnhuber, “Moderne Druckgussfertigung” [Modern Die-Casting], Fachverlag Schiele und Schön GmbH, Berlin, 1971, pages 137 and 139.
- The goal of the present invention is to improve a device according to the species so that it is as efficient as possible, has compact dimensions, and can be operated as inexpensively as possible.
- This goal of the invention is achieved by a device having the characteristic features of
claim 1. - In other words, the invention proposes an approach in which the movable chamber walls are located not exclusively outside the mold but are disposed to allow displacement of the chamber contents into the mold. This approach results in a savings in material since the sprue can be avoided or considerably reduced. As a result, a reduction can be made in the quantity of material in circulation which must be re-cooled and re-melted for each cycle, with the possible ensuing melting loss in expensive alloy elements, this melting loss having to be continually replaced.
- Since the sprue/runner can be reduced or completely eliminated, the amount of heated material, and thus the heat load on the injection unit and the mold itself, are also reduced, thereby allowing for shorter cool-down phases and consequently for a higher number of pieces produced per unit time.
- Since the material enters the mold directly from the chamber without any intermediate injection channel, larger flow cross-sections can be used and, as a result, possible deviations in material flow can be avoided. The material therefore does not need to be heated to as high a temperature as it otherwise would to permit the optimal flow-through capability into the mold for comparatively smaller inlet ports or to permit the proper flow over long distances. The result is that a lower temperature level can be set for the molten metal—with the result that this measure allows the heat load on the device to be reduced, as already mentioned, shortens cool-down times, and enhances the efficiency of the device.
- The fact that deviations in material flow can be avoided allows the load on the device to be reduced since such deviations may result in premature wear and actual erosion. In addition, this fact may allow for a reduction in required impelling power since the conveying resistance of the material can be reduced.
- The fact that the injection unit extends into the mold and is not located exclusively outside the mold means that the device can be produced with compact dimensions. This feature is enabled specifically by the fact that one of the two walls does not merely extend up to the edge of the mold but may be moved into the mold.
- One of the two movable walls of the injection unit chamber may be advantageously designed as the section of the wall of the mold cavity which is designed to be movable for the purpose of opening the mold. This approach avoids complex multi-axial movements and ensures that, when the mold is opened, this injection unit wall, which is movable into the casting mold, is moved together with the section of the mold to he opened—thereby allowing the access to the casting when the mold is opened to remain unchanged and allowing optimal access to the casting for its removal.
- The following discussion utilizes an embodiment to explain the invention in greater detail.
- FIGS. 1 through 6 show a device for producing castings at various phases of the casting process.
-
Reference 1 in FIG. 1 designates a device for producing castings in a pressure die-casting process. -
Device 1 has a two-part mold 2 which in FIG. 1 is seen in its closed configuration.Device 1 additionally has aninjection unit 3 which serves to inject the fusible material into themold 2. FIG. 1 showsinjection unit 3 in an initial phase of its filling process: - A
conveying unit 4 conveys the molten or at least partially molten material into achamber 5 ofinjection unit 3. The chamber walls are formed by around tube 6, aninjection piston 7, and asealing piston 8. - In FIG. 1, the volume of
chamber 5 is comparatively small. The chamber volume can be kept to an extreme minimum by moving the twopistons unit 4 intochamber 5, while sealingpiston 8 is increasingly moved away frominjection piston 7 to adjust for the quantity of admitted material, as FIG. 2 shows. - FIG. 2 shows
injection unit 3 in an end phase of filling wheninjection unit 3 is essentially filled with the casting material. The volume ofchamber 5 has increased accordingly, andinjection piston 7 continues to be situated at a position in which the access for conveyingunit 4 intochamber 5 is open. - Once the desired quantity of material has been admitted to
chamber 5, the twopistons chamber 5 is now closed relative to conveyingunit 4. - Sealing
piston 8 is moved out oftube 6 and intomold 2. This action openstube 6 and thus,chamber 5. A further movement ofinjection piston 7 causes the material to be injected fromchamber 5 intomold 2. - FIG. 4 shows the end position of
injection piston 7.Sealing piston 8 is located insidemold 2 at a position in which it forms part of the wall ofmold 2, which part limits themold cavity 9 which in turn determines the subsequent contour of the casting. In the embodiment shown, this is a casting, for example, a rotationally symmetrical component such as a wheel, a cover, or the like, in the shaping of which sealingpiston 8 directly participates, and which may be accordingly designed so as to determine the desired surface shape of the casting. In this case, the sprue point into the casting can be displaced such that advantageously there is no “sprue” in the conventional sense, i.e., a part which must be removed from the casting and can be used only as recycled material. - Alternatively, the approach may be to have one or more individual end products arranged radially around the region of the two
pistons pistons actual mold 2. In this case,injection piston 7 can extend further than shown in FIG. 3 to keep the material thickness of the sprue as small as possible. - In FIG. 5, it is evident that
mold 2 is open. For this purpose,mold 2 consists of a fixedmold section 10 and anothermovable mold section 11.Sealing piston 8 is supported within themovable mold section 11 and is movable together with or separately frommovable mold section 11 such that, aftermold 2 is opened, the casting can be removed easily and with the same accessibility as with a conventional injection unit in which all the components are located outsidemold 2. - After removal of the casting,
movable mold section 11 may again be moved towardfixed section 10 of the mold. This motion results also in sealingpiston 8 being moved towardinjection piston 7 which has remained in its end position. FIG. 6 shows in purely schematic form thatscaling piston 8 has preferably been moved up toinjection piston 7 in order to create a minimum volume inchamber 5 beforemold 2 is completely closed. This allows for easy venting of the surrounding atmosphere so thatchamber 5 is set for a minimum chamber volume. For safety reasons only, meaning the avoidance of mechanical damage topistons pistons - Starting with the status shown in FIG. 6,
mold 2 is closed, i.e., themovable section 11 is moved completely against fixedmold section 10 after which the backplates ofmold 2 are locked so that it is ready to receive the injection pressures. - One advantage of the device according to the invention is that sealing
piston 8 is allowed to rest againstmovable mold section 11 during the injection procedure—with the result that, advantageously, no expensive and design-specific provision has to be made in terms of a separate support for sealingpiston 8 since the injection pressures acting on sealingpiston 8 are accommodated bymold 2 or its backplates. - Subsequent to the situation in FIG. 6 and after
mold 2 has been closed,chamber 5 is displaced by a movement of the same direction and speed effected bypistons chamber 5 is situated in front of the opening ofconveying unit 4 so that a new operating cycle can take place.
Claims (3)
1. Device for producing castings out of fusible or dispersible base material,
including an injection unit from which the at least partially liquefied material can be injected into a mold,
wherein the injection unit has an inlet port for feeding the material,
and wherein the injection unit has a chamber with two movable walls which may as desired be moved either together in the same direction or in opposite directions so that the cavity of the chamber may be varied by volume as desired and/or be displaceable,
one of the two walls forming a section of the wall delimiting the mold cavity (9),
characterized in
that the two walls each form a part of the walls delimiting the mold cavity (9),
one of the two walls being movable into the mold (2).
2. Device according to claim 1 , characterized in that the wall which is movable into the mold (2) is designed as a piston (8) which is supported within a tubular chamber wall so as to be longitudinally movable or is supported so as to be movable toward chamber (5) to perform a sealing function, and that this wall is movable together with a movable mold section (11) of mold (2).
3. Device according to claim 1 , characterized in that the wall which is movable into mold (2) is designed to partially determine the surface shape of the casting.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10033166.1 | 2000-07-07 | ||
DE10033166A DE10033166A1 (en) | 2000-07-07 | 2000-07-07 | Device for producing castings, with a wall that can be guided into the casting mold |
Publications (1)
Publication Number | Publication Date |
---|---|
US20030173053A1 true US20030173053A1 (en) | 2003-09-18 |
Family
ID=7648201
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/070,565 Abandoned US20030173053A1 (en) | 2000-07-07 | 2001-06-30 | Device for producing castings that comprises a wall can be guided into the casting mold |
Country Status (8)
Country | Link |
---|---|
US (1) | US20030173053A1 (en) |
EP (1) | EP1301301A1 (en) |
JP (1) | JP2004502549A (en) |
KR (1) | KR20020064281A (en) |
BR (1) | BR0106937A (en) |
DE (1) | DE10033166A1 (en) |
TW (1) | TW558467B (en) |
WO (1) | WO2002004147A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050279479A1 (en) * | 2004-06-17 | 2005-12-22 | Qingyou Han | Method and apparatus for semi-solid material processing |
US20070170103A1 (en) * | 2006-01-25 | 2007-07-26 | Baldwin Filters, Inc. | Fluid filter |
JP2013071156A (en) * | 2011-09-28 | 2013-04-22 | Ube Machinery Corporation Ltd | Apparatus and method for injection molding |
CN116851700A (en) * | 2023-07-06 | 2023-10-10 | 东莞汇鸿鑫精密机械有限公司 | Aluminum alloy die-casting structural component forming die |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102445096B1 (en) | 2022-04-06 | 2022-09-20 | 주식회사 처음부터재테크 | Disk ejector to upgrade your computer's performance |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5611387A (en) * | 1992-07-23 | 1997-03-18 | Hi-Tec Metals Limited | Moulding device |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH661883A5 (en) * | 1982-10-20 | 1987-08-31 | Inst Po Metalloznanie I Tekno | Submerged-plunger (hot-chamber piston) die-casting method and a machine for carrying out the method |
FR2665654B1 (en) * | 1990-08-09 | 1994-06-24 | Armines | PRESSURE CASTING MACHINE OF A THIXOTROPIC METAL ALLOY. |
DE4310755C2 (en) * | 1993-04-01 | 1996-04-25 | Druckgusswerk Moessner Gmbh We | Die casting device |
CH690753A5 (en) * | 1996-10-29 | 2001-01-15 | Buehler Ag Patentabteilung | Assembly for working thixotropic materials has a number of workstations with a conveyor system including an electromagnetic stirrer and an ejector for the metal portions |
DE19914830A1 (en) * | 1999-04-01 | 2000-10-05 | Buehler Druckguss Ag Uzwil | Vacuum die casting process involves opening the evacuated die cavity only after complete filling of the casting chamber with molten metal |
ATE213980T1 (en) * | 1999-04-20 | 2002-03-15 | Ritter Aluminium Giesserei Gmb | DIE CASTING PROCESS |
-
2000
- 2000-07-07 DE DE10033166A patent/DE10033166A1/en not_active Withdrawn
-
2001
- 2001-06-30 WO PCT/DE2001/002486 patent/WO2002004147A1/en not_active Application Discontinuation
- 2001-06-30 KR KR1020027003013A patent/KR20020064281A/en not_active Application Discontinuation
- 2001-06-30 EP EP01953863A patent/EP1301301A1/en not_active Withdrawn
- 2001-06-30 US US10/070,565 patent/US20030173053A1/en not_active Abandoned
- 2001-06-30 JP JP2002508591A patent/JP2004502549A/en active Pending
- 2001-06-30 BR BR0106937-3A patent/BR0106937A/en not_active Application Discontinuation
- 2001-07-05 TW TW090116496A patent/TW558467B/en not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5611387A (en) * | 1992-07-23 | 1997-03-18 | Hi-Tec Metals Limited | Moulding device |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050279479A1 (en) * | 2004-06-17 | 2005-12-22 | Qingyou Han | Method and apparatus for semi-solid material processing |
US7216690B2 (en) * | 2004-06-17 | 2007-05-15 | Ut-Battelle Llc | Method and apparatus for semi-solid material processing |
US20070187060A1 (en) * | 2004-06-17 | 2007-08-16 | Qingyou Han | Method and apparatus for semi-solid material processing |
US7493934B2 (en) | 2004-06-17 | 2009-02-24 | Ut-Battelle, Llc | Method and apparatus for semi-solid material processing |
US7621315B2 (en) | 2004-06-17 | 2009-11-24 | Ut-Battelle, Llc | Method and apparatus for semi-solid material processing |
US20070170103A1 (en) * | 2006-01-25 | 2007-07-26 | Baldwin Filters, Inc. | Fluid filter |
US7897046B2 (en) | 2006-01-25 | 2011-03-01 | Baldwin Filters, Inc. | Fluid filter |
JP2013071156A (en) * | 2011-09-28 | 2013-04-22 | Ube Machinery Corporation Ltd | Apparatus and method for injection molding |
CN116851700A (en) * | 2023-07-06 | 2023-10-10 | 东莞汇鸿鑫精密机械有限公司 | Aluminum alloy die-casting structural component forming die |
Also Published As
Publication number | Publication date |
---|---|
TW558467B (en) | 2003-10-21 |
KR20020064281A (en) | 2002-08-07 |
BR0106937A (en) | 2002-05-14 |
DE10033166A1 (en) | 2002-01-24 |
EP1301301A1 (en) | 2003-04-16 |
JP2004502549A (en) | 2004-01-29 |
WO2002004147A1 (en) | 2002-01-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ING. WALTER HENGST GMBH & CO. KG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BOEHNKE, CHRISTIAN;REEL/FRAME:013087/0470 Effective date: 20020515 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |