EP1478480A1 - Druckgiessmaschine und verfahren zur kolbenschmierung - Google Patents
Druckgiessmaschine und verfahren zur kolbenschmierungInfo
- Publication number
- EP1478480A1 EP1478480A1 EP03706409A EP03706409A EP1478480A1 EP 1478480 A1 EP1478480 A1 EP 1478480A1 EP 03706409 A EP03706409 A EP 03706409A EP 03706409 A EP03706409 A EP 03706409A EP 1478480 A1 EP1478480 A1 EP 1478480A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- filling chamber
- piston
- tube
- release agent
- casting machine
- 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
Links
- 238000004512 die casting Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000001050 lubricating effect Effects 0.000 title claims abstract description 5
- 239000000314 lubricant Substances 0.000 claims abstract description 16
- 238000003860 storage Methods 0.000 claims abstract description 3
- 239000006082 mold release agent Substances 0.000 claims description 13
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 239000003921 oil Substances 0.000 claims description 4
- -1 polyethylene Polymers 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 239000001993 wax Substances 0.000 claims description 4
- 125000000129 anionic group Chemical group 0.000 claims description 2
- 239000006185 dispersion Substances 0.000 claims description 2
- 239000003995 emulsifying agent Substances 0.000 claims description 2
- 229920002545 silicone oil Polymers 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 7
- 239000003795 chemical substances by application Substances 0.000 description 7
- 238000005461 lubrication Methods 0.000 description 7
- 239000004033 plastic Substances 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 6
- 239000000203 mixture Substances 0.000 description 4
- 239000002480 mineral oil Substances 0.000 description 3
- 235000010446 mineral oil Nutrition 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910017532 Cu-Be Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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
- B22D17/2015—Means for forcing the molten metal into the die
- B22D17/2038—Heating, cooling or lubricating the injection unit
Definitions
- the invention relates to a die casting machine with a movable and a fixed mold half, which in the closed position delimit a mold cavity, a filling chamber for receiving liquid metal, a piston which is slidably displaceable in the filling chamber and sits on a plunger rod for ejecting the liquid metal from the filling chamber and Shoot into the mold cavity, and a device for supplying lubricant for the piston in the filling chamber.
- the invention further relates to a method for lubricating the piston in the filling chamber of a die casting machine.
- liquid metal is metered into the filling chamber, ejected from the filling chamber with the piston and injected into the mold cavity.
- the pistons sliding on the hot cylindrical inner wall of the filling chamber or its piston rings are exposed to high loads. Lubrication of the piston is therefore essential.
- Today's pistons are made of a Cu-Be alloy or steel. Piston greases and oils as well as granules or pellets are used as lubricants. Graphite-free or graphite-containing piston oils are applied by drip or spray lubrication. With drip lubrication, the piston is applied while it is at the beginning of its stroke. With spray lubrication, the piston is also at the start of its stroke, and spraying takes place through the metal filler opening, i.e. in front of the piston.
- the piston lubricants commonly used today are based on mineral oil and are therefore not very environmentally friendly.
- the invention is based on a first object of developing a die casting machine of the type mentioned at the outset in such a way that a piston lubricant is optimally applied to the piston and the inner wall of the filling chamber.
- a second object of the invention is to provide an improved lubrication method in a die casting machine of the type mentioned at the outset with an environmentally compatible lubricant.
- the process should at least achieve the lubricating properties of the mineral oil-based lubricants.
- the object of the invention is that at least one tube or a nozzle with an opening directed against the piston is fixed on the stamp rod, and the tube or the nozzle is connected to a supply container for the lubricant via a feed line.
- the lubricant can be applied in a simple manner to the piston and the inner wall of the filling chamber.
- the tube or nozzle is therefore preferably made of thin metal tube or plastic.
- the tube or the nozzle and possibly part of the feed line may prove expedient to arrange the tube or the nozzle and possibly part of the feed line in a longitudinal groove in the plunger rod.
- the pipe or the nozzle can be fastened to the stamp rod by means of at least one fastening element, which should also have the lowest possible mass.
- fastening elements are for example plastic straps such as cable ties or pipe clips made of plastic or metal.
- a water-based mold release agent during a period in which the piston is at its stroke end after the liquid metal has been shot into the mold cavity, into the space between the plunger rod and the cylindrical inner wall of the Filling chamber is sprayed in the direction of the piston.
- the mold release agent is preferably a polyethylene primary dispersion with anionic and nonionic emulsifiers, known under the trade name HORDAMER PE 34.
- the mold release agent can contain waxes such as polyethylene wax and / or oils such as silicone oil.
- composition of the mold release agent is expediently chosen such that a foam forms in the filling chamber when sprayed. This leads to an optimal wetting of the piston, possibly the piston rings and the inner wall of the filling chamber. The excess water / release agent mixture is removed from the filling chamber when the piston moves back.
- the mold release agent sprayed into the filling chamber advantageously contains 0.5 to 5% by weight of solids, preferably 1 to 2% by weight of solids, and water as the remainder.
- FIG. 2 shows a detail of the die casting machine from FIG. 1.
- a die casting machine 10 shown in FIG. 1 for die casting aluminum alloys has a fixed mold half 14 and a movable mold half 16 which are clamped on a fixed machine plate 12a and on a movable machine plate 12b and which delimit a mold cavity 18 in the closed position.
- a filling chamber 20 extends in the fixed mold half 14, in which a piston 22 is arranged displaceably.
- the filling chamber 20 can be filled manually or automatically with liquid metal via an opening 24.
- the mold cavity 18 is delimited on the side of the filling chamber 20 by a shaped gate 28 and on the opposite side by a vacuum run or mold exit channel 26.
- the mold cavity 18 is connected via the mold outlet channel 26 to a vacuum valve 30, which in turn is connected to a vacuum container 34 via a suction channel 32 and a shut-off valve 33 connected into the suction channel 32.
- the vacuum container 34 is evacuated by means of a vacuum pump 36.
- the piston 22 sits on a plunger rod 38 which is actuated axially in both directions by means of a hydraulic cylinder 40.
- the piston 22 consists, for example, of a Cu-Be alloy and can be equipped with piston rings 42.
- the filling chamber 20 is usually made of steel.
- a pipe piece 44 is mounted on the stamp rod 38, for example in the form of a thin metal pipe or made of plastic.
- the attachment is carried out via plastic straps 46, for example in the form of cable ties, or via pipe clips.
- a flexible line 48 for example a Plastic hose or a flexible metal tube connects the tube 44 to a storage vessel 52 for a separating agent 54.
- a pressure booster 50 is connected to the flexible line 48.
- Fig. 2 shows the position of the piston at its stroke end in the area of the shaped gate 28, i.e. after the liquid metal has been shot into the mold cavity 18.
- the separating agent / water mixture 54 is sprayed against the piston 22 from the opening 45 of the pipe piece 44 directed against the piston 22 within the space between the plunger rod 38 and the inner wall of the filling chamber 20 ,
- the plunger rod 38 with the spray device attached thereon and the piston 22 is then withdrawn in preparation for the next shot until the piston 22 is at the start of its stroke.
- excess release agent / water mixture is expelled by means of the piston 22 through the open end of the filling chamber 20.
- a thin release agent film thus remains on the inner wall of the filling chamber 20 after the remaining water has evaporated.
- a comparison test carried out on a die casting machine with an aluminum alloy showed that the service life of piston rings was around 300 rounds with a conventional graphite-containing lubricant based on mineral oil, while the service life could be increased up to 15,000 rounds with a water-based mold release agent.
- a water-based mold release agent for piston lubrication has the advantage that a uniform release agent / lubricant can be used for the mold and for the filling chamber or the piston.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Lubricants (AREA)
- Casting Devices For Molds (AREA)
- Mold Materials And Core Materials (AREA)
- Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
- Actuator (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP03706409A EP1478480B1 (de) | 2002-02-19 | 2003-02-01 | Verfahren zur kolbenschmierung einer druckgiessmaschine |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP02405125A EP1336445A1 (de) | 2002-02-19 | 2002-02-19 | Druckgiessmaschine und Verfahren zur Kolbenschmierung |
| EP02405125 | 2002-02-19 | ||
| EP03706409A EP1478480B1 (de) | 2002-02-19 | 2003-02-01 | Verfahren zur kolbenschmierung einer druckgiessmaschine |
| PCT/EP2003/001001 WO2003070400A1 (de) | 2002-02-19 | 2003-02-01 | Druckgiessmaschine und verfahren zur kolbenschmierung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1478480A1 true EP1478480A1 (de) | 2004-11-24 |
| EP1478480B1 EP1478480B1 (de) | 2005-09-28 |
Family
ID=27619208
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02405125A Withdrawn EP1336445A1 (de) | 2002-02-19 | 2002-02-19 | Druckgiessmaschine und Verfahren zur Kolbenschmierung |
| EP03706409A Expired - Lifetime EP1478480B1 (de) | 2002-02-19 | 2003-02-01 | Verfahren zur kolbenschmierung einer druckgiessmaschine |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02405125A Withdrawn EP1336445A1 (de) | 2002-02-19 | 2002-02-19 | Druckgiessmaschine und Verfahren zur Kolbenschmierung |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US7040375B2 (de) |
| EP (2) | EP1336445A1 (de) |
| JP (1) | JP4163627B2 (de) |
| AT (1) | ATE305350T1 (de) |
| AU (1) | AU2003208363A1 (de) |
| CA (1) | CA2473049C (de) |
| DE (1) | DE50301263D1 (de) |
| WO (1) | WO2003070400A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2628504C (en) | 2007-04-06 | 2015-05-26 | Ashley Stone | Device for casting |
| JP5045203B2 (ja) * | 2007-04-23 | 2012-10-10 | 宇部興産機械株式会社 | ダイカストマシン |
| US8167490B2 (en) | 2009-04-22 | 2012-05-01 | Reynolds Consumer Products Inc. | Multilayer stretchy drawstring |
| KR101693645B1 (ko) * | 2015-02-23 | 2017-01-06 | 서용석 | 인서터형 다이케스팅용 슬리브 |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2683060A (en) * | 1953-04-24 | 1954-07-06 | Sprayers & Nozzles Inc | Sprayer and sprayer pump |
| US4257902A (en) * | 1976-08-04 | 1981-03-24 | Singer & Hersch Industrial Development (Pty.) Ltd. | Water-based industrial fluids |
| JPS61103642A (ja) * | 1984-10-29 | 1986-05-22 | Yushiro Do Brazil Ind Chem Ltd | 水溶性ダイカスト用離型剤 |
| US5028366A (en) * | 1988-01-12 | 1991-07-02 | Air Products And Chemicals, Inc. | Water based mold release compositions for making molded polyurethane foam |
| US5076344A (en) * | 1989-03-07 | 1991-12-31 | Aluminum Company Of America | Die-casting process and equipment |
| JP2972824B2 (ja) * | 1990-11-16 | 1999-11-08 | 株式会社ネオス | 水性離型剤 |
| JPH04236300A (ja) * | 1991-01-17 | 1992-08-25 | Hanano Shoji Kk | プランジャー装置用粉末潤滑剤 |
| JP3180281B2 (ja) * | 1992-11-12 | 2001-06-25 | 東芝機械株式会社 | ダイカストマシンのプランジャ潤滑方法 |
| US6237672B1 (en) * | 1998-12-30 | 2001-05-29 | Dbm Industries, Ltd. | Self lubricating and cleaning injection piston for cold chamber injection unit |
| JP2001071092A (ja) * | 1999-09-02 | 2001-03-21 | Hanano Shoji Kk | 水溶性離型剤 |
| JP3866896B2 (ja) * | 2000-03-17 | 2007-01-10 | 日華化学株式会社 | 低速射出金型鋳造用の水性離型剤 |
-
2002
- 2002-02-19 EP EP02405125A patent/EP1336445A1/de not_active Withdrawn
-
2003
- 2003-02-01 DE DE50301263T patent/DE50301263D1/de not_active Expired - Fee Related
- 2003-02-01 AU AU2003208363A patent/AU2003208363A1/en not_active Abandoned
- 2003-02-01 CA CA002473049A patent/CA2473049C/en not_active Expired - Fee Related
- 2003-02-01 AT AT03706409T patent/ATE305350T1/de not_active IP Right Cessation
- 2003-02-01 JP JP2003569347A patent/JP4163627B2/ja not_active Expired - Fee Related
- 2003-02-01 WO PCT/EP2003/001001 patent/WO2003070400A1/de not_active Ceased
- 2003-02-01 EP EP03706409A patent/EP1478480B1/de not_active Expired - Lifetime
- 2003-02-01 US US10/504,904 patent/US7040375B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO03070400A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE305350T1 (de) | 2005-10-15 |
| DE50301263D1 (de) | 2005-11-03 |
| US7040375B2 (en) | 2006-05-09 |
| EP1478480B1 (de) | 2005-09-28 |
| US20050167070A1 (en) | 2005-08-04 |
| CA2473049C (en) | 2008-06-17 |
| EP1336445A1 (de) | 2003-08-20 |
| WO2003070400A1 (de) | 2003-08-28 |
| AU2003208363A1 (en) | 2003-09-09 |
| JP4163627B2 (ja) | 2008-10-08 |
| JP2006503708A (ja) | 2006-02-02 |
| CA2473049A1 (en) | 2003-08-28 |
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| RTI1 | Title (correction) |
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