US3767012A - Automatic oiling arrangement of a die-casting machine - Google Patents

Automatic oiling arrangement of a die-casting machine Download PDF

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Publication number
US3767012A
US3767012A US00207359A US3767012DA US3767012A US 3767012 A US3767012 A US 3767012A US 00207359 A US00207359 A US 00207359A US 3767012D A US3767012D A US 3767012DA US 3767012 A US3767012 A US 3767012A
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US
United States
Prior art keywords
plunger body
plunger
lubricant
sleeve
inlet
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
Application number
US00207359A
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English (en)
Inventor
Y Jimi
T Takeshima
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.)
Nippon Light Metal Co Ltd
Ube Corp
Original Assignee
Nippon Light Metal Co Ltd
Ube Industries Ltd
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.)
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Publication date
Application filed by Nippon Light Metal Co Ltd, Ube Industries Ltd filed Critical Nippon Light Metal Co Ltd
Application granted granted Critical
Publication of US3767012A publication Critical patent/US3767012A/en
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Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
    • F16N7/30—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated the oil being fed or carried along by another fluid
    • 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

  • This invention is related to an automatic oiling apparatus for the sliding area between the inner surface of a sleeve and the outer surface of a plunger tip. Especially such oiling takes place during the time that the plunger tip is moving away from the platen, but no oiling takes place during the time that the plunger tip is approaching the platen.
  • the need for oiling the area of sliding between the sleeve and the plunger tip is commonly recognized and is necessary in order to maintain smooth operation under high temperatures of around 300C or more. This oiling has been commonly carried out manually up to now.
  • the moving platen with a pattern die is parted from the stationary die by means of a suitable mechanism such as an oil cylinder. In this case, the pattern of the die is filled with a molded diecast product.
  • An oil spray apparatus is employed for spraying the lubricant onto the inner surface of the sleeve by inserting the apparatus into the inner bore of the sleeve passing through the space between both dies.
  • this type of oiling there must be some fonn of protection from damage to the operators hand, but even in such cases it there will be almost no difference in the quality of the oiling from the case of manual oiling.
  • This invention is related to an automatic apparatus for oiling the surface of a sleeve by a mechanical oiling apparatus, oiling of which takes place by a lubricant passing through an oil conduit provided within the plunger in every cycle of die-casting, and also is done during the movement of the plunger away from the platen after the die-casting operation is completed.
  • an automatic oiling arrangement mounted on the plunger of a die-casting machine is characterized by, a plunger provided with an oil inlet, two or more oil ejection nozzles are disposed to said plunger in the vicinity of the end face of the tip of said plunger, in an arrangement directed towards the inner surface to be oiled, said nozzles are communicated to said inlet via a conduit running through said plunger so that the lubricant is supplied to said nozzles, lubricant is supplied to said oil inlet from a given oil supply source via flexible connectors.
  • a lubricant can be applied to the inner surface of the sleeve adjacent to the faces of the plunger tip, so that perfect lubrication can be expected thereat, and furthermore more uniform lubrication is generated over the whole length of the inner surface of the sleeve.
  • Another important characteristic of this invention is that the oiling takes place with moistured lubricant, which enables more even and reliable oiling to be maintained than with manual oiling.
  • the operational rate of a die-casting machine can be enhanced due to better oiling on the surface of the sleeve, which is continued until the plunger returns to its starting position. Therefore there is no lost time required for oiling. This means that where this inventional embodiment for die-casting machine is applied, a higher speed die-casting machine can be designed.
  • FIG. 1 shows an entire arrangement of the main part of a die-casting machine with partial omission in the disposition that the metal substance is being poured
  • FIG. 2 shows the same view as FIG. 1, but shows the situation where a metal substance has been forcibly molded into the die-cast pattern
  • FIG. 3 shows the same view as FIG. 2, but shows the state where the die-opening operation is completed
  • FIG. 4 shows a cross sectional view of an embodiment of the plunger and the sleeve
  • FIG. 5 shows a cross-sectional view which is taken through line V-V in FIG. 4,
  • FIG. 6 shows a cross-sectional view of another embodiment with a nozzle together with a compressed air jet hole
  • FIG. 7 shows a cross-sectional view which is taken through line VII-Vll on FIG. 6;
  • FIG. 8 shows a cross-sectional view of another embodiment with a movable inner rod, and shows the state where the plunger and a sleeve are moving towards the platen
  • FIG. 9 shows a cross-sectional view of the same embodiment of FIG. 8, and shows the state where the plunger and sleeve are moving away from the platen.
  • FIGS. 1 to 3 show the typical operation cycle of the die-casting molding process.
  • a die mounting platen 51 is firmly mounted on the machine bed, on which platen an injection sleeve 1 is secured in its corresponding hole.
  • a stationary die 52 is located on the bed in con tact with the platen 51 also.
  • a plunger tip 5 is mounted slidably along the longitudinal axis.
  • the plunger body 3 and the plunger tip 5, coupling 6, piston rod 7 with piston 8 are integrally connected in an axial alignment.
  • the piston cylinder housing 19 is also secured onto the machine bed in an axial alignment with the members 3, 5 and 6.
  • a pattern die 53 which is cooperative with the stationary die 52, is mounted on a movable platen 54 guided by four horizontal guide bars 55, which are fixedly supported by the die-mounting platen 51.
  • the injecting sleeve 1 is provided with an upper radial opening 2 formed near its outer end, through which a prescribed amount of molten substance is poured into the interior of the sleeve, as shown in FIG. 1, to the illustrated level 58.
  • the solid die-cast product 59 is removed from the pattern of the pattern die 53.
  • manual oiling can be applied onto the inner surface of said injecting sleeve 1 by using a proper oiling apparatus, such as an oil injector, passing through the space between the surfaces of pattern die 53 and stationary die 52, after the plunger 3 has resumed its initial disposition.
  • This movement of said plunger 3 away from the platen 51 can be induced by introducing liquid under pressure into the cylinder 19 through the inlet 20.
  • the arrangement of this invention is related to an automatic process of an oiling operation to be applied to the above-mentioned inner surface of the sleeve 1, which arrangement will be explained in detail with reference to FIGS. 4 to 7.
  • the plunger body 3 is provided with the plunger tip 5 and the spacer 4, the front part of which is screwed into the hole of said plunger tip 5, and also the rear part of which is screwed into the hole of the plunger 3.
  • a long oil conduit 9 is provided longitudinally at its center.
  • This long oil conduit 9, through which a lubricant can flow, is connected to the oil pump 17 through the oil inlet 10 positioned on the rear side of conduit 9, to a flexible oil hose 16 and solenoid valve 18, as shown in FIG. 1.
  • nozzles 14 Near the top part of the spacer 4, manyoil injection nozzles 14 are provided, and the center line of the nozzle 14 is inclined forwardly from the radial.
  • the nozzles 14 are arranged at equal distances on the surface of the spacer 4, and the number of nozzles are greater than two, sometimes four or eight per one spacer 4.
  • an oil way 13 is provided, so that it can be connected to said nozzle 14, and also connected to the ring like oil way 12.
  • This spraying is effected during the time that the plunger 3 moves from the position nearest the platen 51 to the position farthest from the platen 51.
  • lubrication of the inner surface of the sleeve 1 can be effectively carried out by moving the plunger tip 5 over the whole length of inner surface of the sleeve 1, and by spraying the inner surface just behind the plunger tip 5.
  • Such oil spraying control can be done by means of a four way solenoid valve 18 arranged at the midportion of a flexible oil hose 16, which is operated in synchronism with the two way solenoid valve (not shown within drawings) for the cylinder 19.
  • FIG. 6 Another embodiment, shown in FIG. 6, has an improved plunger and improved oil spraying apparatus.
  • a plunger body 3 is provided with two separate conduits along its axis.
  • One conduit 9 is for the lubricant and the other conduit 27 is for compressed air.
  • the hole 26 is connected with, an air conduit 27 provided within the plunger body 3, through a hole 23 provided in the block 22 and a cylindrical room 29 of said block 24.
  • the cylindrical room 29 is connected with an air inlet 28 provided on the plunger body 3 through a long air conduit 27.
  • the hole 25 is connected with a tubular room 30 in the block 24, and also with a long oil conduit 9.
  • the blocks 22 and 24 are secured to the plunger body 3 by means of a bolt 31. And the connection between the plunger tip 5 and the plunger body 3'can be made by the screwed portion of the plunger tip 5.
  • the low pressure oil, at about 1 kg/cm, flowing out from the hole 25 can be convertedinto a very fine spray by the effect of the high speed air jet from the air outlet hole 26.
  • the spray can be directed peripherally, and sprayed onto the inner surface of the sleeve 1 in the direction of the tilted angle b from the radial.
  • the proper oil pressure for this use is about 3 to 4 kg/cni. This condition can provide more uniform and better distribution of spray onto the inner surface of the sleeve l, because it has to traverse a longer passageway to the inner surface than in the case where it is sprayed radially.
  • the third embodiment shown in FIG. 8, has an improved plunger body.
  • This body is provided with a plunger 33 which has a long control cylindrical bore, and with an opening 40 at its side, and a plunger tip 35 with a central hole is coupled to the plunger 33 by a screw.
  • An inner rod 34 is slidably arranged within the central hole of the tip 35, and a enlarged top part 36 is arranged at the end of the rod 34, and on the opposite end of the inner rod 34, a piston 37 is fixed which cooperates with the cylindrical bore of the plunger 33.
  • Many oil ejecting holes 45 are provided on the surface at the part just under the enlarged head 36 of the inner rod 34.
  • This ejecting hole 45 is connected to the central oil conduit 39' which is drilled longitudinally on the inner rod 34.
  • the opposite end of the conduit 39 is connected to the oil inlet 10, and the oil inlet 10 is allowed to move freely within the opening 40.
  • two inlets 41 and 42 are provided on opposite sides of the piston 37, and a-liquid under pressure can be inserted into any room, which is defined by the cylinder 38 and the piston 37, through either of the inlets When the tip 5 is moving toward the platen 51, the
  • piston 37 is positioned at its extreme backward position by the high pressure liquid which is supplied into the room of cylinder 37 in FIG. 8 through inlet 41, which is directly connected to the inlet 21 of piston cylinder 19, as shown in FIG. 1.
  • the inlet 42 is also directly connected to the inlet 20 in the same manner as mentioned above. So the insertion of the pressure liquid through the inlet 21 causes the movement of the plunger 3 toward the platen 51, by the liquid flowing into the cylinder through the inlet 41, this means that the piston 37 is forced to move so that the enlarged head 36 can be forced against the front surface of the plunger tip 35. Because the enlarged head 36 is provided on the top end of inner rod 34, this part will stop the movement of inner rod 34 because of the end of the central hole of the plunger-tip 35, thus restricting the movement of the inner rod 34. This condition is shown in FIG. 8.
  • hole 45 is situated near the center portion of sleeve 1, so the condition of spray of the lubricant should be fine and uniform due to the fact that the distance between the hole 45 and the inner surface of the sleeve 1 to be lubricated is fairly large.
  • This arrangement provides enhanced lubrication in high speed die-casting, which requires better lubrication than in the case of the low, speed die-casting. Furthermore, thus lubricating system can lubricate the inner surface of the center hole of the stationary die 52, in addition to the front end portion of the sleeve 1.
  • a two position lubricating arrangement can be provided, one at the front of the side surface of the plunger tip, and the other at the back of the opposite surface of the plunger tip. This means that move perfect lubrication can be expected than any of the embodiments mentioned previously.
  • Automatic lubrication means for die-casting machine comprising, in combination:
  • a movable plunger body having a compressed air inlet and a lubricant inlet
  • said tip having a forward end face and a rearward end face
  • a sleeve receiving said plunger tip and plunger body, the forward position of said plunger body forming a space between said body and said sleeve;
  • first conduit means extending through said plunger body connecting said air jet holes to said compressed air inlet
  • said air jet holes are directed at an angle relative to the radial for increasing the effective spray distance from said jet holes to said sleeve surface.
  • Automatic lubrication means for die-casting machine comprising, in combination:
  • a movable cylindrical plunger body having a compressed air inlet and a lubrication inlet
  • a cylindrical plunger tip having a stem portion secured to said plunger body, said tip having a forward end face, and an annular rearward end face disposed at the forward end of said stern portion;
  • a cylindrical sleeve receiving said plunger tip, valve block and plunger body, said valve block forming an annular space between said block and the inner surface of said sleeve;
  • first conduit means extending through said plunger body connecting said jet holes to said compressed air inlet
  • a second flexible connector for connecting said lubricant inlet to a lubricant supply source.
  • said air jet holes are directed at an angle relative to the radial for increasing the effective spray distance from said jet holes to said sleeve surface.
US00207359A 1970-12-15 1971-12-31 Automatic oiling arrangement of a die-casting machine Expired - Lifetime US3767012A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1970124740U JPS4929215Y1 (de) 1970-12-15 1970-12-15

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US (1) US3767012A (de)
JP (1) JPS4929215Y1 (de)
AU (1) AU465582B2 (de)
BE (1) BE776694A (de)
CA (1) CA949000A (de)
DE (1) DE2162186C3 (de)
FR (1) FR2118072B1 (de)
GB (1) GB1369630A (de)
IT (1) IT943982B (de)
NL (1) NL151282B (de)
SE (1) SE383274B (de)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4223718A (en) * 1979-01-26 1980-09-23 Isao Miki Molten metal injection device for die casting machine
US4420028A (en) * 1980-10-29 1983-12-13 Outboard Marine Corporation Lubrication system for a die casting machine
US4482045A (en) * 1981-11-24 1984-11-13 Phillips Petroleum Company Valve and material supply system
US4664173A (en) * 1985-10-11 1987-05-12 Wolniak Robert T Shot rod
US4744740A (en) * 1983-08-25 1988-05-17 Technoplas, Inc. Straight-hydraulic mold clamping system in molding machine
EP0394988A2 (de) * 1989-04-25 1990-10-31 Maschinenfabrik Müller-Weingarten AG Vorrichtung zur Schmierung eines Gie kolbens an einer Druckgie maschine
US5076343A (en) * 1990-08-24 1991-12-31 Briggs & Stratton Corporation Die cast plunger lubrication system
US5217662A (en) * 1989-08-22 1993-06-08 Fanuc Ltd. Automatic lubricant supplying method and an apparatus therefor
US6237672B1 (en) 1998-12-30 2001-05-29 Dbm Industries, Ltd. Self lubricating and cleaning injection piston for cold chamber injection unit
US6454052B2 (en) * 2000-01-27 2002-09-24 Victor Ken-Seng Wu Lubrication device adapted to be used in a punching machine
US20060000573A1 (en) * 2004-06-30 2006-01-05 Yoshiyuki Shinki Die casting machine
EP1820584A1 (de) * 2006-02-21 2007-08-22 Tribo-Chemie GmbH Kaltkammer-Druckgießmaschine, Kaltkammer-Druckgießverfahren, und Kolbenschmiermittel dafür
US20080274221A1 (en) * 2007-05-05 2008-11-06 Metso Lindemann Gmbh Machine for processing residual material
DE102009034505A1 (de) * 2009-07-24 2011-02-03 Bayerische Motoren Werke Aktiengesellschaft Druckgussvorrichtung
CN104445033A (zh) * 2014-11-10 2015-03-25 苏州环球集团链传动有限公司 一种套筒内自动加油机
CN109332638A (zh) * 2018-12-07 2019-02-15 蚌埠隆华压铸机有限公司 一种便于压射的压铸机

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62156063A (ja) * 1985-12-27 1987-07-11 Nippon Denso Co Ltd ダイカスト方法およびダイカスト装置
JP2504099B2 (ja) * 1987-02-28 1996-06-05 日本電装株式会社 ダイカスト方法およびダイカスト装置
DE3913494C2 (de) * 1989-04-25 1994-11-10 Mueller Weingarten Maschf Ausbildung des Gießkolbens einschließlich Kolbenstange an Druckgießmaschinen
DE4243827A1 (de) * 1992-12-23 1994-06-30 Mueller Weingarten Maschf Gießgarnitur für eine Druckgießmaschine
DE4316927A1 (de) * 1993-05-19 1994-11-24 Mueller Weingarten Maschf Gießgarnitur für eine Druckgießmaschine
DE102020107791A1 (de) 2020-03-20 2021-09-23 Ae Group Ag Spritzgussmaschine und Verfahren zum Schmieren einer Spritzgussmaschine
EP4194120A1 (de) 2021-12-07 2023-06-14 Wieland-Werke AG Druckgussvorrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3110931A (en) * 1960-09-17 1963-11-19 Daimler Benz Ag Casting installation with automatic lubrication system
FR1446922A (fr) * 1965-09-15 1966-07-22 Buehler Ag Geb Percuteur pour l'extraction de pièces moulées
US3544355A (en) * 1967-08-31 1970-12-01 Respond Inc Shot cylinder lubricating apparatus
US3581845A (en) * 1969-03-07 1971-06-01 Ingersoll Rand Co Air line oiler
US3613772A (en) * 1968-12-27 1971-10-19 Irving A Carr Injection piston for diecasting

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB965652A (en) * 1962-02-07 1964-08-06 Volkswagenwerk Ag Injection means for pressure casting machines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3110931A (en) * 1960-09-17 1963-11-19 Daimler Benz Ag Casting installation with automatic lubrication system
FR1446922A (fr) * 1965-09-15 1966-07-22 Buehler Ag Geb Percuteur pour l'extraction de pièces moulées
US3544355A (en) * 1967-08-31 1970-12-01 Respond Inc Shot cylinder lubricating apparatus
US3613772A (en) * 1968-12-27 1971-10-19 Irving A Carr Injection piston for diecasting
US3581845A (en) * 1969-03-07 1971-06-01 Ingersoll Rand Co Air line oiler

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4223718A (en) * 1979-01-26 1980-09-23 Isao Miki Molten metal injection device for die casting machine
US4420028A (en) * 1980-10-29 1983-12-13 Outboard Marine Corporation Lubrication system for a die casting machine
US4482045A (en) * 1981-11-24 1984-11-13 Phillips Petroleum Company Valve and material supply system
US4744740A (en) * 1983-08-25 1988-05-17 Technoplas, Inc. Straight-hydraulic mold clamping system in molding machine
US4664173A (en) * 1985-10-11 1987-05-12 Wolniak Robert T Shot rod
EP0394988A2 (de) * 1989-04-25 1990-10-31 Maschinenfabrik Müller-Weingarten AG Vorrichtung zur Schmierung eines Gie kolbens an einer Druckgie maschine
EP0394988A3 (de) * 1989-04-25 1991-08-14 Maschinenfabrik Müller-Weingarten AG Vorrichtung zur Schmierung eines Gie kolbens an einer Druckgie maschine
US5217662A (en) * 1989-08-22 1993-06-08 Fanuc Ltd. Automatic lubricant supplying method and an apparatus therefor
US5076343A (en) * 1990-08-24 1991-12-31 Briggs & Stratton Corporation Die cast plunger lubrication system
US6354359B2 (en) 1998-12-30 2002-03-12 Dbm Industries Ltd. Method for cleaning and lubricating an injection sleeve and plunger in a cold chamber injection unit
US6237672B1 (en) 1998-12-30 2001-05-29 Dbm Industries, Ltd. Self lubricating and cleaning injection piston for cold chamber injection unit
US6454052B2 (en) * 2000-01-27 2002-09-24 Victor Ken-Seng Wu Lubrication device adapted to be used in a punching machine
US20060000573A1 (en) * 2004-06-30 2006-01-05 Yoshiyuki Shinki Die casting machine
US7210514B2 (en) * 2004-06-30 2007-05-01 Taiho Kogyo Co., Ltd. Die casting machine
EP1820584A1 (de) * 2006-02-21 2007-08-22 Tribo-Chemie GmbH Kaltkammer-Druckgießmaschine, Kaltkammer-Druckgießverfahren, und Kolbenschmiermittel dafür
US20080274221A1 (en) * 2007-05-05 2008-11-06 Metso Lindemann Gmbh Machine for processing residual material
US7909594B2 (en) * 2007-05-05 2011-03-22 Metso Lindemann Gmbh Machine for processing residual material
DE102009034505A1 (de) * 2009-07-24 2011-02-03 Bayerische Motoren Werke Aktiengesellschaft Druckgussvorrichtung
DE102009034505B4 (de) * 2009-07-24 2012-10-04 Bayerische Motoren Werke Aktiengesellschaft Druckgussvorrichtung
CN104445033A (zh) * 2014-11-10 2015-03-25 苏州环球集团链传动有限公司 一种套筒内自动加油机
CN109332638A (zh) * 2018-12-07 2019-02-15 蚌埠隆华压铸机有限公司 一种便于压射的压铸机

Also Published As

Publication number Publication date
CA949000A (en) 1974-06-11
DE2162186B2 (de) 1974-04-18
FR2118072B1 (de) 1974-09-13
SE383274B (sv) 1976-03-08
DE2162186A1 (de) 1972-06-22
IT943982B (it) 1973-04-10
FR2118072A1 (de) 1972-07-28
DE2162186C3 (de) 1974-11-14
NL151282B (nl) 1976-11-15
AU3659971A (en) 1973-06-14
BE776694A (fr) 1972-04-04
AU465582B2 (en) 1975-10-02
NL7117208A (de) 1972-06-19
GB1369630A (en) 1974-10-09
JPS4929215Y1 (de) 1974-08-08

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