EP1183119B1 - Werkstück-erzeugungsvorrichtung - Google Patents
Werkstück-erzeugungsvorrichtung Download PDFInfo
- Publication number
- EP1183119B1 EP1183119B1 EP00925174A EP00925174A EP1183119B1 EP 1183119 B1 EP1183119 B1 EP 1183119B1 EP 00925174 A EP00925174 A EP 00925174A EP 00925174 A EP00925174 A EP 00925174A EP 1183119 B1 EP1183119 B1 EP 1183119B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- production
- parts according
- tool
- storage tank
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2218—Cooling or heating equipment for dies
Definitions
- the invention relates to a workpiece-producing device, in particular a die casting device according to the preamble of claim 1.
- the spray cooling allows effective cooling of the workpiece.
- the disadvantage, however, is that the cycle times by the spray cooling substantially be extended, for example by 10, or even by 20%.
- GB-A-2 123 334 is a simple closed Coolant circuit described, consisting of a coolant source, a first line between the source and cooling channels in one Injection mold and a second line between the Casting tool and the coolant source.
- Messund Control device installed, which is an electric suction pump in the control second line. prevails in the cooling channels of the casting tool Vacuum. If the suction pump from the casting mold an air / water mixture sucks, the air from the mixture in one of the Pump downstream separator deposited.
- US-A-4 151 243 discloses a method of cooling plastic injection molds described in which in successive process steps alternately coolant or air with negative pressure through the mold is encouraged.
- the coolant is supplied by a suction pump through the Promoted mold and then from the surrounding air through sucked the same mold. This is to be achieved that very much close molds can be cooled and should be prevented the plastic compound is wetted with the coolant.
- the invention has the object, a workpiece-generating device, in particular a die casting device according to the To provide preamble of claim 1, which has a longer service life of the Tool insert with the possibility connects to the spray cooling without.
- the diecasting device makes it possible Avoid the spray cooling due to the consistent quality of the Cooling channels.
- the inventive vacuum cooling air in the cooling channels entry it is deliberately accepted that by the inventive vacuum cooling air in the cooling channels entry.
- vibrations or cavitations are generated, apparently help to keep the cooling channels clean so that the testing has shown that despite the greater pressure difference between the tool insert and the prevailing overpressure and the cooling channels the cleanliness of the cooling channels - and thus the constant cooling over the life of the tool - is guaranteed.
- the inventive solution also offers the advantage that they less prone to failure. Even if, for example, a cooling water supply line something is leaking, this is just a little extra air sucked in, and the appropriate line must not be promptly due the leak be replaced, as is the case with the known ones Overpressure cooling systems is the case.
- the cooling water pump may be provided in the secondary circuit, so that the primary circuit is provided only with a jet pipe. This offers the considerable advantage that any impurities in the cooling water Do not damage the pump automatically. In known cooling systems one has to prevent damage to the cooling water pump corresponding filter upstream of the cooling water pump. These filters however, tend to constipate over prolonged use, so they need to be cleaned regularly.
- a separator is provided by, for example the suction port for the cooling water pump not immediately at the bottom of the reservoir, but are provided slightly higher. Due to the so far easy to realize Abscheiderial the Cooling water tank basically remain uncleaned for years.
- jet pipe can be so generously dimensioned that there from the primary circuit existing passage cross section is not through the Effect of impurities can be clogged.
- numerous cooling channels can also be very easy be provided near the tool surfaces. This can be a realize particularly good cooling of the tool insert. It can be one Differential pressure of, for example, 0.8 bar between the input terminal and the output port of the cooling passage to be provided even for relatively narrow Kühikanal cross sections is quite sufficient.
- the primary circuit over a central cooling water tank is guided.
- the secondary circuit, the Under overpressure, therefore serves so far only the drive of Primary circuit and the primary circuit is only slightly Line pressure and quite large line cross sections over long distances directed.
- an additional Switching valve provided for testing the tightness of the Can serve casting tool.
- an additional Bypass line can be trialed the supply of cooling water Divert so that the tool insert is checked with overpressure. in this connection then exits through the cracks in the mold cooling water, and it can in so far as to check whether the leaks are not so great that but an exchange of the tool is required.
- the illustrated in Fig. 1 die casting device 10 has a Tool insert 12, which held by a mold frame 14 is. It will pass through a plurality of cooling channels, one of which Cooling channel 16 in the figure schematically the casting tool 18 passing is shown while four other cooling channels 20, 22, 24 and 26 only are shown with their inputs and outputs. It is understood that the cooling channels in any suitable manner within the casting tool 18 are guided and in particular also without further close to the Tool surface can be performed, for example, at a distance by only 0.3 cm or even slightly lower.
- each cooling channel 18 to 26 with a water meter 28 and a check valve 30 is provided. It should be understood that such additional features are optional. Furthermore, each cooling channel 16 and 20 to 26 outlet side, each with a Provided pressure transducer 32, as well as with another shut-off valve 34. A Such a system makes it possible to use different casting tools and the number of required cooling channels to the requirements adapt.
- the mutually parallel cooling channels 16, 20, 22, 24 and 26th Accordingly, each have an input port on the casting tool 36 and an output terminal 38.
- the cooling channels are in one Integrated primary cooling circuit 40, which will be described below.
- the jet pipe acts as a vacuum source and may be formed in any suitable manner, which is understands that basically other suitable instead of the jet pipe 42 Vacuum pumps can be realized.
- jet pipe 42 it is preferable to use the jet pipe 42 alone because of the low wear and the functional safety.
- a jet pipe is not damaged by a possible dry run, and has no rotating parts.
- the preferred according to the invention works Jet pipe already at a low flow pressure in the amount of 1.5 bar.
- the extracted through the jet pipe cooling water passes through a pipe 44 to a reservoir 46 equipped with an overflow 48, which is fed to a central cooling water basin.
- the central cooling water basin is not shown in the figure.
- the central cooling water tank also feeds another storage tank 50, the reservoir of the primary circuit 40.
- the reservoir 50 is with its outlet connected to a conduit 52 which enters the cooling channels 16 and 20 to 26 is branched.
- the secondary circuit 60 starts at the reservoir 46 of the secondary circuit.
- a check valve 62 is provided to the the outlet port of the reservoir 46 is connected.
- the Check valve 62 is also in communication with a pump 64 and a this downstream expansion vessel 66.
- the pressure side of the pump 64 is connected to the input port of the jet pipe 42, and the Line 44 is then connected to the jet pipe 42 from the primary circuit 40 and the secondary circuit 60 pass through together.
- the primary circuit is located in the region of the output terminal 38 a negative pressure of about 0.8 bar.
- the conduit 44, the secondary and primary circuit is shared, designed with a slightly enlarged diameter, in order to maintain a pressure downstream of the jet pipe 42, which is approximately corresponds to the ambient pressure.
- Both reservoirs 46 and 50 are in a conventional manner with Sensors 72 equipped, the sensors serve to fall below or exceeding the ever predetermined liquid level Report.
- a bypass line 74 is provided.
- This bypass line is with applicable changeover valves and is in normal operation off. It serves to test the tightness of the casting tool 18.
- a check valve 82 separates the bypass line 74 from the reservoir 50.
- the cooling channels 16 and 20 to 26 can in this way under Overpressure can be set, and it can be in the mold 18 resulting cooling water loss, it being understood that that the shut-off valves 34 can be closed.
- the diecasting device is a diecasting device prefers. It is understood that instead of any other workpiece-producing device, such as an injection molding machine, or another cooled deformation unit that requires cooling channels can be cooled accordingly.
Description
Claims (9)
- Werkstück-Erzeugungsvorrichtung, insbesondere Druckgusseinrichtung, mit einem Giesswerkzeug (18), das mehrere Kühlkanäle aufweist, die sich benachbart der Werkzeugoberfläche erstrecken, wobei die Kühlkanäle mindestens einen Eingangsanschluss und mindestens einen Ausgangsanschluss für die Kühlflüssigkeit aufweisen, und wobei der Ausgangsanschluss (38) an eine Unterdruckquelle (42) und der Eingangsanschluss (36) an einen Kühlflüssigkeits-Vorratsbehälter (50) angeschlossen ist, dadurch gekennzeichnet, dass die Unterdruckquelle als ein Strahlrohr (42) ausgebildet ist.
- Werkstück-Erzeugungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet. dass Eingangsanschluss (36) und Ausgangsanschluss (38) über einen Primär-Kühlkreislauf (40) miteinander verbunden sind.
- Werkstück-Erzeugungsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Strahlrohr (42) von einem Sekundär-Kühlkreislauf (60) durchströmt ist.
- Werkstück-Erzeugungsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Sekundär- und der Primär Kühlkreislauf (60, 40) je einen Vorratsbehälter (46, 50) aufweisen und dass das durch das Giesswerkzeug (18) erwärmte Kühlwasser aus einem Überlauf des Sekundär-Vorratsbehälters (46) zu einem zentralen Kühlwasserbecken abgeleitet wird, und dass das dem Giesswerkzeug (18) zugeleitete Kühlwasser aus dem Primär-Vorratsbehälter (50) zugeleitet wird, der aus dem zentralen Kühlwasserbecken gespeist ist.
- Werkstück-Erzeugungsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Primär-Kühlkreislauf (40) mit einem Kühlturm oder externen Verdunstungskühler und einem Abscheider für Verunreinigungen ausgestattet ist.
- Werkstück-Erzeugungsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sich der Primär-Kühlkreislauf (40) und der Sekundär-Kühlkreislauf (60) in einer Leitung (44) zwischen dem Strahlrohr (42) und dem Sekundär-Vorratsbehälter (46) überlappen.
- Werkstück-Erzeugungsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Eingangsanschluss (36) unter Umgebungs-Luftdruck steht und der Ausgangsanschluss (38) unter einem Saugdruck von mindestens 0,3 insbesondere 0,5 bis 0,9 und bevorzugt 0,8 Bar steht.
- Werkstück-Erzeugungsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kühlkanäle (16, 20, 22, 24, 26) extrem nahe an die Werkzeugoberfläche herangeführt sind, insbesondere bis auf 0,2 bis 0,8 cm.
- Werkstück-Erzeugungsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kühlflüssigkeits-Vorratsbehälter (46, 50) mit Niveausonden ausgerüstet sind, die ein Unterschreiten/Überschreiten des vorgegebenen Kühlflüssigkeitspegels signalisieren.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19917379 | 1999-04-16 | ||
DE19917379A DE19917379A1 (de) | 1999-04-16 | 1999-04-16 | Werkstück-Erzeugungsvorrichtung |
PCT/EP2000/003083 WO2000062958A1 (de) | 1999-04-16 | 2000-04-06 | Werkstück-erzeugungsvorrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1183119A1 EP1183119A1 (de) | 2002-03-06 |
EP1183119B1 true EP1183119B1 (de) | 2003-07-30 |
Family
ID=7904898
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00925174A Expired - Lifetime EP1183119B1 (de) | 1999-04-16 | 2000-04-06 | Werkstück-erzeugungsvorrichtung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1183119B1 (de) |
AT (1) | ATE246062T1 (de) |
DE (2) | DE19917379A1 (de) |
WO (1) | WO2000062958A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109093092A (zh) * | 2018-08-10 | 2018-12-28 | 徐峰 | 一种机边冷却站 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4151243A (en) * | 1978-04-03 | 1979-04-24 | Logic Devices, Inc. | Method for cooling plastic injection mold dies |
GB2123334A (en) * | 1982-07-14 | 1984-02-01 | Coolmation Limited | Mould cooling means |
US4976305A (en) * | 1987-12-01 | 1990-12-11 | Honda Giken Kogyo Kabushiki Kaisha | Method of and apparatus for controlling die temperature in low-pressure casting process |
-
1999
- 1999-04-16 DE DE19917379A patent/DE19917379A1/de not_active Withdrawn
-
2000
- 2000-04-06 WO PCT/EP2000/003083 patent/WO2000062958A1/de active IP Right Grant
- 2000-04-06 EP EP00925174A patent/EP1183119B1/de not_active Expired - Lifetime
- 2000-04-06 DE DE50003121T patent/DE50003121D1/de not_active Expired - Lifetime
- 2000-04-06 AT AT00925174T patent/ATE246062T1/de not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109093092A (zh) * | 2018-08-10 | 2018-12-28 | 徐峰 | 一种机边冷却站 |
Also Published As
Publication number | Publication date |
---|---|
ATE246062T1 (de) | 2003-08-15 |
DE50003121D1 (de) | 2003-09-04 |
DE19917379A1 (de) | 2000-10-19 |
WO2000062958A1 (de) | 2000-10-26 |
EP1183119A1 (de) | 2002-03-06 |
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