EP0489509A2 - Verfahren zur Herstellung von Kernen und Gussformen - Google Patents

Verfahren zur Herstellung von Kernen und Gussformen Download PDF

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Publication number
EP0489509A2
EP0489509A2 EP91310485A EP91310485A EP0489509A2 EP 0489509 A2 EP0489509 A2 EP 0489509A2 EP 91310485 A EP91310485 A EP 91310485A EP 91310485 A EP91310485 A EP 91310485A EP 0489509 A2 EP0489509 A2 EP 0489509A2
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EP
European Patent Office
Prior art keywords
core
pattern
hardening
molding sand
molding
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
EP91310485A
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English (en)
French (fr)
Other versions
EP0489509A3 (en
EP0489509B1 (de
Inventor
Hiroaki Sano
Takashi Yasukuni
Masaaki Ohata
Kiyotaka Nagai
Hiroshi Matsuura
Kunio Koshiishi
Yasuyoshi Hirama
Kyozaburo Ogawa
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.)
Mitsubishi Heavy Industries Ltd
Kao Quaker Co Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Kao Quaker Co 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.)
Filing date
Publication date
Priority claimed from JP3110428A external-priority patent/JPH04339544A/ja
Priority claimed from JP3127284A external-priority patent/JP2659870B2/ja
Priority claimed from JP3136397A external-priority patent/JPH04361852A/ja
Application filed by Mitsubishi Heavy Industries Ltd, Kao Quaker Co Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of EP0489509A2 publication Critical patent/EP0489509A2/de
Publication of EP0489509A3 publication Critical patent/EP0489509A3/en
Application granted granted Critical
Publication of EP0489509B1 publication Critical patent/EP0489509B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/28—Compacting by different means acting simultaneously or successively, e.g. preliminary blowing and finally pressing

Definitions

  • the present invention relates to a method of manufacturing a core and a mold, and more particularly to a method of manufacturing a core and a mold using self-hardening molding sand or gas-hardening molding sand.
  • a core means a part which forms the shape of a hollow portion of a casting product, and is generally manufactured with a sandmold.
  • the configuration of the core is multifarious depending on a casting product.
  • Manufacture of a core using self-hardening molding sand has been heretofore performed by, for example, hand molding, by a machine, such as a jolt machine and a two-dimensional jolt molding machine, and by filling a mold utilizing air (a blowing method).
  • the method of filling molding sand utilizing air is used widely in mass production foundries as a method of molding a core with comparatively middle and small sized mass products as its objects.
  • the core is generally manufactured by hand molding only or a joint operation of molding by a machine (such as a jolt machine and a two-dimensional jolt molding machine) and that by hand.
  • a machine such as a jolt machine and a two-dimensional jolt molding machine
  • Fig. 13 shows a method of manufacturing a core by hand molding.
  • reference numeral 1 denotes a core pattern
  • 2 denotes self-hardening molding sand
  • 9 denotes a rammer or a sand rammer.
  • the self-hardening molding sand 2 is charged into the core pattern 1 in an appropriate quantity, rammed with the rammer or the sand rammer 9 and left as it is until it self-hardens.
  • Fig. 14 shows a method of manufacturing a core using a two-dimensional jolt molding machine, in which 1 denotes a core pattern, 2 denotes self-hardening molding sand and 6′ denotes a two-dimensional jolt molding machine.
  • the core pattern 1 is placed on the two-dimensional jolt molding machine 6′, the self-hardening molding sand 2 is charged in an appropriate quantity into the core pattern 1, and the two-dimensional jolt molding machine 6′ is operated to shake the pattern,so as to improve filling density of the self-hardening molding sand 2.
  • the core is taken out of the core pattern 1 after leaving it as it is until the self-hardening molding 2 hardens, similarly to hand molding shown in Fig. 13.
  • Such a method of manufacturing a core has problems as follows.
  • a hand molding method and a molding method with a two-dimensional jolt molding machine are also adopted for the manufacture of a sandmold casting using self-hardening casting sand.
  • the pattern is taken out of a flask after standing by for several tens of minutes to several hours until a chemical reaction between a resin for caking mixed in the molding sand and a hardening agent progresses and the mold hardens after the molding of the self-hardening mold is completed.
  • 15 is a partial longitudinal sectional side view showing a method of manufacturing a self-hardening mold by hand molding, in which numeral 11 denotes a pattern, 12 a flask, 13 self-hardening molding sand, 17 a roller conveyor, 22 a sand rammer and 24 a surface plate.
  • the flask 12 is placed on the surface plate 24 on the roller conveyor 17, the pattern 11 is placed in the flask 12, and the self-hardening molding sand 13 is charged in an appropriate quantity in a void portion, formed with the pattern 11 and the flask 12 and is rammed with the sand rammer 22.
  • the mold is manufactured through repetitive operations of charging of the self-hardening molding sand 13 and ramming with the sand rammer 22, the mold is left as it is until it hardens.
  • Fig. 16 is a partial longitudinal sectional side view showing a method of manufacturing a self-hardening mold using a two-dimensional jolt molding machine, in which numeral 11 denotes a pattern, 12 denotes a flask, 13 denotes self-hardening molding sand, 14 denotes a vibrating table, 15 denotes air springs, 16 denotes shakers, 17 denotes a roller conveyor, 23 denotes a riser wood pattern and 24 denotes a surface plate.
  • numeral 11 denotes a pattern
  • 12 denotes a flask
  • 13 denotes self-hardening molding sand
  • 14 denotes a vibrating table
  • 15 denotes air springs
  • 16 denotes shakers
  • 17 denotes a roller conveyor
  • 23 denotes a riser wood pattern
  • 24 denotes a surface plate.
  • the flask 12 mounted on the surface plate 24 is placed on the vibrating table 14 of the two-dimensional jolt molding machine, the pattern 11 is placed in the flask 12, the self-hardening molding sand 13 is charged in the void portion formed with the pattern 11 and the flask 12, and it is intended to improve the filling density of the self-hardening molding sand 13 by shaking the two-dimensional jolt molding machine.
  • filling at a root portion of the riser wood pattern 23 and the like is not sufficient only by molding with shaking on the two-dimensional jolt molding machine. Therefore, it is also required to perform supplementary hand molding operation with a sand rammer or a rammer. Further, in case there is an attachment on the pattern, filling at the lower part of the attachment is liable to be insufficient, and thus hand operation is necessary in a similar manner to the above-described case. After the mold is manufactured in such a manner, ejection is performed, that is, the pattern 11 and the riser wood pattern 23 are taken out after leaving the mold as it is until the self-hardening molding sand 13 hardens similarly to the case of hand molding.
  • the ejection time of the self-hardening mold depends on the atmospheric temperature, the sand temperature, the humidity, the quantity of resin added, the type of hardening agent, the quantity of a hardening agent added and the like. Therefore, it is difficult to control the ejection time, and such troubles as damage to the pattern and damage and deformation of a mold occur.
  • a gas hardening mold is produced by ventilating a gas which reacts with a caking agent added to the gas-hardening molding sand for hardening after the gas-hardening molding sand is blown into the flake or the core pattern by utilizing compressed air using a core shooter or a core blowing machine.
  • the molding by hand or by a two-dimensional jolt molding machine is adopted.
  • Fig. 17 and Fig. 18 show hand molding of a core using gas-hardening molding sand and core molding by a two-dimensional jolt machine.
  • 51 denotes a core pattern
  • 52 denotes gas-hardening molding sand
  • 53 denotes a vent hole
  • 54 denotes a bypass hole for sand replenishment
  • 55 denotes a rammer
  • 56 denotes a two-dimensional jolt molding machine.
  • the gas-hardening molding sand 52 is charged in the void portion of the core pattern 51 through a core print (an opening portion) of the core and a bypass hole 54 for sand replenishment, and the gas-hardening molding sand 52 is rammed with the rammer 55. Since the gas-hardening molding sand 52 cannot be filled in case of a core having a complicated configuration, sand charging and ramming operations are repeated. After molding of the core is completed, the molding sand is hardened by ventilating the core hardening gas.
  • Fig. 18 shows a molding method of a core using a two-dimensional jolt molding machine, in which, after a core pattern 51 is positioned on a two-dimensional jolt molding machine 56, gas-hardening molding sand 52 is charged in the void portion of the core pattern 51 through a core print (an opening portion) of the core and a bypass hole 54 for sand replenishment and the two-dimensional jolt molding machine 56 is turned on, so as to mold the core. Since portions (B1), (B2), (B3) and others cannot be filled, however, it is required to mold the core by adopting hand-ramming operation with a rammer 55 jointly. After molding of the core is completed, the molding sand is made to harden by ventilating a core hardening gas.
  • Fig. 19 and Fig. 20 show hand molding of a mold using gas-hardening molding sand and molding of a mold by a two-dimensional jolt molding machine, respectively.
  • 61 denotes a pattern
  • 62 denotes a flask
  • 63 denotes gas-hardening molding sand
  • 68 denotes a riser wood pattern
  • 69 denotes a sand rammer for ramming
  • 70 denotes a two-dimensional jolt molding machine.
  • the flask 62 is installed on a surface plate 71 fitted with the pattern 61, the gas-hardening molding sand 63 is charged in the flask 62 thereafter, and the gas-hardening molding sand 63 is rammed with the sand rammer 69 for ramming, thus producing a mold.
  • the mold is hardened by ventilating a predetermined gas to the mold.
  • Fig. 20 shows molding of a mold using a two-dimensional jolt molding machine 70.
  • a surface plate 71 fitted with a pattern 61 is placed on the two-dimensional jolt molding machine 70, and a flask 62 is arranged thereon.
  • gas-hardening molding sand 63 is charged in the flask 62, and the two-dimensional jolt molding machine 70 is turned on, so as to manufacture a mold. Thereafter, the mold is hardened by ventilating a predetermined gas to the mold.
  • the molding sand is not filled sufficiently at the root portion of the riser wood pattern 68 only by shaking of the two-dimensional jolt molding machine, however, it is required to perform supplementary ramming with a sand rammer 69 for thrusting or by hand.
  • a mold or a core having a normal configuration is unobtainable in case of a complicated configuration by conventional methods of hand molding with gas-hardening molding sand and molding of a mold and a core by a two-dimensional jolt molding machine.
  • delicate hand work is required, which causes an increase in molding process steps.
  • the filling density of the mold or the core is low, and unevenness in molding is liable to be produced.
  • dimensional accuracy of a casting is insufficient, and fettling becomes more complicated with occurrance of casting defects such as seizure and penetration.
  • the first object of the present invention is achieved by a method of manufacturing a core in which there are provided means for speeding up air flow by sucking self-hardening molding sand in a core pattern and means for applying three-dimensional jolt to the core pattern, and self-hardening molding sand is charged while applying three-dimensional jolt to the pattern and air flow is speeded up by sucking the inside of the pattern after filling the inside of the pattern with the molding sand.
  • the molding sand flows into every nook and corner of the mold and minute filling is performed by applying three-dimensional jolt to the pattern when the self-hardening molding sand is charged or after charged in the core pattern.
  • the moisture contained in the molding sand and the moisture generated by chemical reaction of the caking agent are removed by speeding up air flow by sucking the filled molding sand, thus accelerating hardening.
  • the second object of the present invention is achieved by a method of manufacturing a self-hardening mold in which a flask is placed on a surface plate, a pattern is placed in a flask and self-hardening molding sand is charged in the flask, and the molding sand is filled between the pattern and the flask while applying three-dimensional jolt; a method of manufacturing a self-hardening mold in which a flask is placed on a surface plate, a pattern is placed in the flask and self-hardening molding sand is charged in the flask, the molding sand is rammed between the pattern and the flask, and air flow is accelerated by sucking the inside of the flask thereafter, thereby to dehydrate the moisture in the molding sand; and a method of manufacturing a self-hardening mold in which a flask is placed on a surface plate, a pattern is placed in the flask and self-hardening molding sand is charged in the flas
  • the molding sand flows into every nook and corner of the pattern and minute filling is performed, thus making it possible to effect accurated molding by applying three-dimensional jolt to the flask and the pattern when the self-hardening molding sand is charged or after it is charged in the flask where the pattern is placed. Further, by sucking the molding sand filled in the flask, the moisture contained in the molding sand and the moisture generated by the reaction of the resin in a caking agent mixed in the molding sand and a hardening agent are transpired and the moisture in the flask is removed by suction, thus promoting hardening.
  • air flow is speeded up by suction in the present specification means to speed up the air flow in a mold forcibly by suction.
  • a reduced-pressure suction unit such as a vacuum pump as means of "speeding up air flow by suction”.
  • the third object of the present invention is achieved by a method of manufacturing a gas-hardening mold and core in which molding sand which hardens by gas ventilation is used and manufacturing is performed while applying three-dimensional jolt.
  • the mold or the core is manufactured by shaking the pattern or the core pattern while applying a shaking force preferably at 1 to 5 G and/or in a combination of jolt in three directions of X, Y and Z, in any two directions of X, Y and Z, and in any one direction of X, Y and Z.
  • a core pattern 1 provided with a reduced-pressure suction box 3 or reduced-pressure suction means for core hardening is installed on a vibrating table of a three-dimensional jolt molding machine 6.
  • the three-dimensional jolt molding machine 6 is actuated and jolt is applied in three directions, i.e., X-axis, Y-axis and Z-axis, so as to fill the self-hardening molding sand 2 in the core pattern.
  • the three-dimensional jolt molding machine 6 is stopped, then an appropriate quantity (for example, 1/4 of the total sand quantity) of molding sand is charged in the core pattern, and the three-dimensional jolt molding machine 6 is actuated.
  • the remaining quantity portion (for example, 1/4) of the self-hardening molding sand 2 is then charged in the core pattern 1, and jolt filling is performed again.
  • a reduced-pressure suction unit 8 is operated for several minutes, and the core is sucked through a suction pipe 7 and the reduced-pressure suction box 3 so as to cause an air flow in the mold, thereby to remove by dehydration the moisture in the self-hardening molding sand 2 and the moisture generated when a caking agent reacts chemically, thus promoting hardening.
  • the shaking forces (frequencies) along the X-, Y- and Z-axes of the three-dimensional jolt molding machine 6 were set at 50 hertz, respectively, the core pattern 1 having a core weight of 30 Kg was installed on a vibrating table, 1/2 of the total sand quantity of the furan molding sand 2 was charged in the core pattern 1, and jolt was applied for 10 seconds. Then, 1/4 of the total sand quantity of the furan molding sand 2 was charged in the core pattern 1 and jolted for 20 seconds, and a little over 1/4 of the total sand quantity of the furan molding sand 2 was charged further in the core pattern 1 and jolted for 30 seconds. After the core pattern was completed, the reduced-pressure suction unit 8 was actuated (for 5 minutes) so as to harden the core by speeding up air flow in the mold by sucking the core.
  • Table 1 shows hardening characteristics when air flow rate in the mold was accelerated for hardening by sucking the furan self-hardening sand.
  • Fig. 2 shows a second embodiment.
  • a core pattern 1 provided with intercommunicating pores 4 for reduced-pressure suction at portions A1, A2, ..., A6 where self-hardening molding sand 2 could not be filled in recessed portions of the core pattern 1 was installed on a three-dimensional jolt molding machine 6, the furan molding sand 2 was charged in the core pattern 1 while actuating a reduced-pressure suction unit 8, and the three-dimensional jolt molding machine 6 provided jolt for about 60 seconds keeping pace with the above, thus manufacturing the core.
  • a good core was obtainable.
  • Fig. 4 shows a fourth embodiment in which a core is hardened by sucking under reduced pressure from an upper part of a core pattern.
  • a core pattern 1 provided with intercommunicating pores 4 for reduced-pressure suction and holes 5 for sand replenishment (omitted depending on the configuration of the core) is installed on a vibrating table of a three-dimensional jolt molding machine 6.
  • a core is molded by shaking with the three-dimensional jolt molding machine 6 while charging self-hardening molding sand 2 mixed at a separate location in the core pattern 1 in parts by appropriate quantities.
  • the ejection period of the core could be reduced by half as compared with a conventional self-hardening method, and uniform hardening up to the depth of the core was realized.
  • Reference number 10 denotes a clamp in Fig.4.
  • Fig. 5 shows a fifth embodiment in which hardening is made by sucking under reduced pressure from a side of a core pattern.
  • the adding method and the shaking point of self-hardening molding sand 2 are similar to those in the fourth embodiment.
  • Fig. 6 shows an apparatus suitable for working of a method of manufacturing a self-hardening mold of the present invention.
  • Fig. 6 is a partial longitudinal sectional side view, in which 11 denotes a pattern, 12 denotes a flask and 13 denotes self-hardening molding sand, in which normal temperature self-hardening furan resin as a caking agent of the molding sand of a sandmold casting and a hardening agent are mixed.
  • 14 denotes a vibrating table of a three-dimensional jolt molding machine
  • 15 denotes air springs
  • 16 denotes shakers
  • 17 denotes a roller conveyor which conveys a surface plate 24 on which a flask 12 is placed.
  • 18 denotes a vertical working cylinder
  • 19 denotes a surface plate for suction under reduced pressure
  • 20 denotes a suction pipe
  • 21 denotes a control board of a pressure reducing unit.
  • the flask 12 is placed on a surface plate 24, and a pattern 11 is placed in the flask 12 and a riser wood pattern 23 is fitted, which are installed on a vibrating table 14 of a three-dimensional jolt molding machine.
  • a flask 12 placed on the surface plate 24 of Fig.6 was placed on the vibrating table 14 of the conventional two-dimensional jolt molding machine shown in Fig. 16, a pattern 11 was placed in the flask 12, furan self-hardening molding sand 13 was charged in a void portion formed by the pattern 11 and the flask 12, and the shakers 16 of the two-dimensional jolt molding machine were actuated thereby to fill the molding sand 13.
  • this assembly was conveyed into a pressure reducing unit shown in Fig. 6, and was brought into a close contact with the upper surface of the flask 12 by lowering the surface plate 19 for reduced-pressure suction provided with a reduced-pressure suction mechanism by means of a vertical working cylinder 18.
  • a pressure reducing pump (not shown) was operated for five minutes and the pressure inside the flask 12 was reduced down to 200 mmHg through suction pipes 20.
  • the mold was ejected and the hardening state thereof was investigated. As a result, it was found that the ejection period could be reduced by half as compared with that in which no pressure reduction was made, and a good mold which was hardened uniformly up to the depth of the mold and had no deformation was also obtainable.
  • a flask 12 is placed via the surface plate 24 on the vibrating table 14 of the three-dimensional jolt molding machine shown in Fig. 6 and a pattern 11 to which a riser wood pattern 23 is fitted is installed therein.
  • an appropriate quantity for example, 3/4 of the total sand quantity
  • the shakers 16 of the three-dimensional jolt molding machine were actuated, jolt in three directions of X-axis, Y-axis and Z-axis was applied, and the furan self-hardening molding sand 13 was charged in the flask 12.
  • a surface plate 19 for reduced-pressure suction provided with a reduced-pressure suction mechanism was lowered by a vertical working cylinder 18 so as to be brought into close contact with the upper surface of the flask 12, a pressure reducing pump not shown was actuated for several minutes (for example, about 5 minutes) so as to reduce the pressure in the flask 12 (for example, 150 mmHg to 250 mmHg) through a suction pipe 20, and the moisture contained in the furan self-hardening molding sand 13 and the moisture generated at time of chemical reaction between furan resin which is a caking agent mixed with the molding sand and a hardening agent were evaporated thereby to be removed by dehydration through the suction pipe 20.
  • the mold ejected after being left as it was for about 30 minutes showed a good mold having no deformation, and the hardening period was not only reduced by half, but also the filling density was high, and which was hardened uniformly up to the central part thereof, as compared with a conventional mold left as it was with no pressure reduction.
  • Table 2 shows reduced-pressure suction hardening characteristics of the furan self-hardening molding sand.
  • 31 denotes a core pattern
  • 32 denotes gas-hardening molding sand
  • 33 denotes vent holes
  • 34 denotes by-pass holes for sand replenishment
  • 35 denotes a three-dimensional jolt molding machine
  • 36 denotes a clamp
  • 37 denotes a generator
  • 38 denotes a box
  • 39 denotes a door
  • 40 denotes a pressure regulator
  • 41 denotes a methyl formate tank
  • 42 denotes a control board.
  • a core pattern 31 was placed on the table of the three-dimensional jolt molding machine 35, and fixed with a clamp 36. Thereafter, ester gas-hardening molding sand 32 mixed separately (silica sand No. 6 100% and alkaline phenol resin 2.2%) was charged through core print portions and bypass holes 34 for sand replenishment at the upper part of the core pattern 31, and X-Y jolt was applied. After filling for 30 seconds, ester gas-hardening molding sand 32 add' was charged and jolted for 15 seconds with Y-Z jolt, and jolt in two directions and jolt in one direction were repeated thereafter.
  • ester gas-hardening molding sand 32 mixed separately (silica sand No. 6 100% and alkaline phenol resin 2.2%) was charged through core print portions and bypass holes 34 for sand replenishment at the upper part of the core pattern 31, and X-Y jolt was applied. After filling for 30 seconds, ester gas-hardening molding
  • the core pattern 31 was inserted into the box 38 of the generator 37, the door 39 was closed, and methyl formate gas, the pressure of which was regulated with the pressure regulator 40, was supplied , thus hardening the core.
  • the result of ejecting the core out of the core pattern 31 and investigating the accuracy and the filling state of the core showed a much better state as compared with a core by hand molding or by two-dimensional jolt molding and hand molding combined.
  • 31 to 36 denote members similar to those of the embodiment 9, and 43 denotes an amine gas blowing apparatus.
  • a core pattern 31 was disposed on the table of the three-dimensional jolt molding machine 35, and fixed with a clamp 36. Thereafter, cold box molding sand 32 mixed separately (silica sand No. 6 100%, isocurepart 1 - 0.75% and isocurepart 2 - 0.75%) was charged through core print portions and bypass holes 34 for sand replenishment at the upper part of the core pattern 31, and the core was molded by a method similar to the embodiment 8. Thereafter, the core pattern 31 was inserted into the amine gas blowing apparatus 43 and the amine gas was supplied for a predetermined period of time. As the result of ejecting the core out of the core mold 31 after the core hardened and investigating the dimension and the filling state, a good core was obtainable similarly to the embodiment 9.
  • SO2 process molding sand mixed separately (silica sand No. 6 100%, furan resin 1.0% and peroxide 50% to furan resin) was charged in a core pattern 31 installed on a three-dimensional jolt molding machine 35 and the core was molded by a method similar to the embodiment 9. Thereafter, sulfur dioxide was supplied for hardening. A core having high dimensional accuracy and high filling density as compared with a core of hand molding or of a two-dimensional jolt molding machine and hand molding combined was obtained.
  • 44 denotes carbon dioxide gas
  • 45 denotes a gas pressure regulator
  • 46 denotes a gas blowing jig.
  • the present embodiment relates to a principal mold, in which 61 denotes a pattern, 62 denotes a flask, 63 denotes gas-hardening molding sand, 64 denotes a three-dimensional jolt molding machine, 65 denotes a generator, 66 denotes a box, 67 denotes a mold and 68 denotes a riser wood pattern.
  • ester gas-hardening molding sand An embodiment of ester gas-hardening molding sand will be described herein as a typical example.
  • a surface plate fitted with the pattern 61 is disposed on the table of the three-dimensional jolt molding machine 64, and the flask 62 is set thereon.
  • a riser wood pattern 68 is fitted to the pattern 61, and after ester gas-hardening molding sand 63 (silica sand No. 6 100% and alkaline phenol resin 2.2%) is charged in the flask 62, the three-dimensional jolt molding machine 64 is actuated and three-dimensional jolt (X, Y, Z) and two-dimensional jolt (X-Y, X-Z, Y-Z) are applied to the flask 62 for an arbitrary period of time.
  • the mold is conveyed into the box 66 of the generator 65, and methyl formate gas is supplied so as to harden the mold.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
EP19910310485 1990-11-14 1991-11-13 Verfahren zur Herstellung von Kernen und Gussformen Expired - Lifetime EP0489509B1 (de)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP30616890 1990-11-14
JP306168/90 1990-11-14
JP3110428A JPH04339544A (ja) 1991-05-15 1991-05-15 自硬性鋳型製作方法
JP110428/91 1991-05-15
JP3127284A JP2659870B2 (ja) 1990-11-14 1991-05-30 中子製作方法
JP127284/91 1991-05-30
JP136397/91 1991-06-07
JP3136397A JPH04361852A (ja) 1991-06-07 1991-06-07 ガス硬化性鋳型及び中子の製作方法

Publications (3)

Publication Number Publication Date
EP0489509A2 true EP0489509A2 (de) 1992-06-10
EP0489509A3 EP0489509A3 (en) 1993-05-26
EP0489509B1 EP0489509B1 (de) 1997-05-21

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EP19910310485 Expired - Lifetime EP0489509B1 (de) 1990-11-14 1991-11-13 Verfahren zur Herstellung von Kernen und Gussformen

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EP (1) EP0489509B1 (de)
DE (1) DE69126193T2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1484125A2 (de) * 2003-06-04 2004-12-08 Laempe + Gies GmbH Verfahren und Vorrichtung zum Herstellen von Kernen und/oder Formen unter Verwendung von Ultraschall
CN111992676A (zh) * 2020-08-14 2020-11-27 宁波卡慕科技有限公司 一种新型箱体铸件的加工模具结构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2551371A1 (fr) * 1983-09-01 1985-03-08 Fischer Jean Marc Boite a noyau pour fonderie
JPS62101345A (ja) * 1985-10-28 1987-05-11 Daido Steel Co Ltd 減圧造型鋳造法
JPS6352741A (ja) * 1986-08-22 1988-03-05 Sintokogio Ltd フルモ−ルド鋳造用鋳型の造型方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2551371A1 (fr) * 1983-09-01 1985-03-08 Fischer Jean Marc Boite a noyau pour fonderie
JPS62101345A (ja) * 1985-10-28 1987-05-11 Daido Steel Co Ltd 減圧造型鋳造法
JPS6352741A (ja) * 1986-08-22 1988-03-05 Sintokogio Ltd フルモ−ルド鋳造用鋳型の造型方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 11, no. 318 (M-632)16 October 1987 & JP-A-62 101 345 ( DAIDO STEEL CO LTD ) 11 May 1987 *
PATENT ABSTRACTS OF JAPAN vol. 12, no. 269 (M-723)27 July 1988 & JP-A-63 052 741 ( SINTOKOGYO LTD ) 5 March 1988 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1484125A2 (de) * 2003-06-04 2004-12-08 Laempe + Gies GmbH Verfahren und Vorrichtung zum Herstellen von Kernen und/oder Formen unter Verwendung von Ultraschall
EP1484125A3 (de) * 2003-06-04 2005-08-24 Laempe + Gies GmbH Verfahren und Vorrichtung zum Herstellen von Kernen und/oder Formen unter Verwendung von Ultraschall
CN111992676A (zh) * 2020-08-14 2020-11-27 宁波卡慕科技有限公司 一种新型箱体铸件的加工模具结构

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EP0489509A3 (en) 1993-05-26
DE69126193T2 (de) 1997-09-25
EP0489509B1 (de) 1997-05-21
DE69126193D1 (de) 1997-06-26

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