EP0353119B1 - Pattern plate for realization of moulds destinate for fabrication of glass jointings or similar pieces with foundry sand by presence of a pad within a counter pattern taper - Google Patents
Pattern plate for realization of moulds destinate for fabrication of glass jointings or similar pieces with foundry sand by presence of a pad within a counter pattern taper Download PDFInfo
- Publication number
- EP0353119B1 EP0353119B1 EP89401935A EP89401935A EP0353119B1 EP 0353119 B1 EP0353119 B1 EP 0353119B1 EP 89401935 A EP89401935 A EP 89401935A EP 89401935 A EP89401935 A EP 89401935A EP 0353119 B1 EP0353119 B1 EP 0353119B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pattern plate
- fact
- plate according
- bead
- movable
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 5
- 239000004576 sand Substances 0.000 title claims description 17
- 239000011521 glass Substances 0.000 title description 2
- 239000011324 bead Substances 0.000 claims abstract description 13
- 229920001971 elastomer Polymers 0.000 claims abstract description 12
- 239000000806 elastomer Substances 0.000 claims abstract description 10
- 238000005056 compaction Methods 0.000 claims abstract description 8
- 238000007528 sand casting Methods 0.000 claims abstract 2
- 238000000605 extraction Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000000717 retained effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 3
- 238000010073 coating (rubber) Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/005—Adjustable, sectional, expandable or flexible patterns
Definitions
- the invention relates to the manufacture by foundry with sand of parts having undercut parts, and more particularly of glass seals or similar parts having a protrusion in the form of an annular bead.
- the object of the invention is to eliminate the above drawbacks, that is to say to produce a model plate forming in the sand the location for a bead undercut during the compression of the sand, but not having no undercut during extraction of the mold or model, and whose geometry of the shape thus obtained is perfectly controlled and independent of the vagaries of operating conditions.
- the invention essentially consists in constituting the deformable part in the form of an annular ring pinched between a fixed external part and an axially movable internal part.
- the invention provides for derealizing each model of the plate into three parts, including a fixed external part having the external profile of the part from the joint plane until the birth of the bead, and having a bore slightly larger inside than that of the part, an interior part embedded in the model plate and movable axially over a short stroke defined by mechanical stops between an extended position, towards which it is returned by elastic means, and a retracted position towards which is pushed back by the pressure of the sand during compaction, this movable inner part internally having a blind bore with the inner diameter of the part to be molded and the bottom of which is in said retracted position at the reference plane of the model plate, the external surface of this internal part adjusting to slide in the internal bore of the external part over at least the height of the latter and ending at the upper part by a rim projecting towards the outside, and finally an elastomer ring mounted on the periphery of this interior part, between said rim and the end of the exterior part, this elastomer ring having a
- This annular elastomer ring as well as the location which is intended for it, preferably have a section ensuring its retention, for example a dovetail section.
- the figures show the model plate 1, which generally comprises several models, only one of which is shown.
- the model plate 1 On this plate is fixed by usual means and, possibly, embedded, the external part 2, the part projecting above the reference plane 3 of the model plate 1 has an external profile 4 representing the external form of the part to be obtained. from the reference plane 3 to point 5 which corresponds to the birth of the undercut bead.
- this outer part 2 Internally, this outer part 2 is delimited by a bore 6 with a diameter slightly greater than the bore of the part to be molded.
- the movable inner part 7 has a blind inner bore 13 whose diameter is that of the part to be molded, and the bottom 14 of which is, in the retracted position according to FIG. 2, at the exact level of the reference plane 3 of the model plate 1.
- the surface outer 15 of this inner part 7 is adjusted to slide inside the bore 6 of the fixed outer part 2, at least over the entire height of the latter, and the cylindrical wall 16 of thin thickness thus formed between the bores 6 and 13 ends at its free end with a flange 17 protruding outward without ever exceeding the diameter of the circle 5 representing the limit of the bead.
- the upper part of the cylindrical surface 15 of the wall 16 defines, with the facing surfaces 18 of the upper edge of the fixed part 2 and 19 of the rim 17 of the moving part 7, the three sides of a section, preferably in dovetail shape, into which an annular elastomer ring 20 is inserted, the outside diameter of which, in the rest position, that is to say therefore in the extended position shown in FIG. 1 not exceed or is less than the diameter of the circle 5 defined above, so as to have no undercut.
- This outer diameter of the ring 20 is even preferably slightly smaller than that of the circle 5, so as to compensate for an always possible persistence of the deformation of the elastomer.
- the annular ring 20 resumes its shape without undercut of Figures 1 and 3, thanks to its own elasticity aided by the force of the springs 10, which allows this extraction in an easy manner without risk of damage the form of sand obtained, and without requiring the cohesion of this sand to be particularly hard.
- the sand mold thus formed is then closed and the metal is poured in the usual way to manufacture the parts which have exactly the desired shape with great precision and great regularity of shape.
Abstract
Description
L'invention concerne la fabrication par fonderie au sable de pièces présentant des parties en contre-dépouille, et plus particulièrement de joints-glaces ou pièces similaires présentant une excroissance en forme de bourrelet annulaire.The invention relates to the manufacture by foundry with sand of parts having undercut parts, and more particularly of glass seals or similar parts having a protrusion in the form of an annular bead.
Pour résoudre ce problème, on connaît déjà, d'après le document FR-A-2 147 163 au nom de CATERPILLAR, une plaque modèle dont chaque modèle comporte un enrobage en caoutchouc se terminant à la partie supérieure en contre-dépouille par une partie uniquement en caoutchouc pour être suffisamment flexible afin de permettre l'extraction du modèle sans arrachement du sable entourant cette partie flexible. Toutefois, il faut pour que cette extraction soit possible sans arrachement, que le sable soit suffisamment durci pour avoir la cohésion nécessaire afin d'imposer cette flexion au rebord en caoutchouc.To solve this problem, we already know, from document FR-A-2 147 163 in the name of CATERPILLAR, a model plate each model of which includes a rubber coating ending at the upper part undercut by a part only rubber to be flexible enough to allow the extraction of the model without tearing away the sand surrounding this flexible part. However, it is necessary for this extraction to be possible without removal, that the sand is sufficiently hardened to have the necessary cohesion in order to impose this bending on the rubber edge.
Pour éviter cette contrainte, on connaît également, d'après le document DE-A-29 40 171 au nom de GOETZE, une plaque modèle similaire dans laquelle le rebord flexible présente une forme au repos sans contre-dépouille et se trouve évasé par flexion vers l'extérieur sous le seul effet de la pression du sable lors du compactage du moule. Toutefois, cet évasement par flexion présente un caractère quelque peu aléatoire, le déplacement des particules de sable lors du compactage n'étant pas un phénomène parfaitement homogène, de sorte que la forme obtenue n'est pas parfaitement régulière.To avoid this constraint, we also know, from document DE-A-29 40 171 in the name of GOETZE, a similar model plate in which the flexible flange has a shape at rest without undercut and is flared by bending outwards under the sole effect of the sand pressure during compaction of the mold. However, this flaring by bending has a somewhat random character, the displacement of the sand particles during compaction is not a perfectly homogeneous phenomenon, so that the shape obtained is not perfectly regular.
Le but de l'invention est d'éliminer les inconvénients précédents, c'est-à-dire de réaliser une plaque modèle formant dans le sable l'emplacement pour un bourrelet en contre-dépouille lors de la compression du sable, mais ne présentant plus de contre-dépouille lors de l'extraction du moule ou du modèle, et dont la géométrie de la forme ainsi obtenue soit parfaitement maîtrisée et indépendante des aléas des conditions opératoires.The object of the invention is to eliminate the above drawbacks, that is to say to produce a model plate forming in the sand the location for a bead undercut during the compression of the sand, but not having no undercut during extraction of the mold or model, and whose geometry of the shape thus obtained is perfectly controlled and independent of the vagaries of operating conditions.
Pour cela, l'invention consiste essentiellement à constituer la pièce déformable sous la forme d'une bague annulaire pincée entre une pièce extérieure fixe et une pièce intérieure mobile axialement.For this, the invention essentially consists in constituting the deformable part in the form of an annular ring pinched between a fixed external part and an axially movable internal part.
En particulier l'invention prévoit déréaliser chaque modèle de la plaque en trois parties, dont une pièce extérieure fixe présentant le profil extérieur de la pièce depuis le plan de joint jusqu'à la naissance du bourrelet, et présentant intérieurement un alésage légèrement plus grand que celui de la pièce, une pièce intérieure encastrée dans la plaque modèle et mobile axialement sur une faible course définie par des butées mécaniques entre une position sortie, vers laquelle elle est rappelée par des moyens élastiques, et une position rentrée vers laquelle est est repoussée par la pression du sable lors du compactage, cette pièce intérieure mobile comportant intérieurement un alésage borgne au diamètre intérieur de la pièce à mouler et dont le fond se trouve dans ladite position rentrée au niveau du plan de référence de la plaque modèle, la surface extérieure de cette pièce intérieure s'ajustant pour coulisser dans l'alésage intérieur de la pièce extérieure sur au moins la hauteur de cette dernière et se terminant à la partie supérieure par un rebord dépassant vers l'extérieur, et enfin un anneau d'élastomère monté à la périphérie de cette pièce intérieure, entre ledit rebord et l'extrémité de la pièce extérieure, cet anneau en élastomère ayant une forme au repos remplissant entièrement l'espace compris entre ledit rebord et ladite partie supérieure de la pièce extérieure dans ladite position sortie, sans présenter de contre-dépouille sur l'extérieur, de manière à subir dans la position rentrée une déformation par compression axiale et expansion transversale vers l'extérieur afin de constituer ledit emplacement du bourrelet.In particular, the invention provides for derealizing each model of the plate into three parts, including a fixed external part having the external profile of the part from the joint plane until the birth of the bead, and having a bore slightly larger inside than that of the part, an interior part embedded in the model plate and movable axially over a short stroke defined by mechanical stops between an extended position, towards which it is returned by elastic means, and a retracted position towards which is pushed back by the pressure of the sand during compaction, this movable inner part internally having a blind bore with the inner diameter of the part to be molded and the bottom of which is in said retracted position at the reference plane of the model plate, the external surface of this internal part adjusting to slide in the internal bore of the external part over at least the height of the latter and ending at the upper part by a rim projecting towards the outside, and finally an elastomer ring mounted on the periphery of this interior part, between said rim and the end of the exterior part, this elastomer ring having a shape at rest entirely filling the space between said flange and said upper part of the external part in said extended position, without presenting an undercut on the outside, so as to undergo in the retracted position a deformation by axial compression and transverse expansion towards the outside in order to constitute said location of the bead.
Cette bague annulaire en élastomère, ainsi que l'emplacement qui lui est destiné, présentent de préférence une section assurant sa retenue, par exemple une section en queue d'aronde.This annular elastomer ring, as well as the location which is intended for it, preferably have a section ensuring its retention, for example a dovetail section.
D'autres particularités de l'invention apparaîtront dans la description qui va suivre d'un mode de réalisation pris comme exemple et représenté sur le dessin annexé, sur lequel :
- la figure 1 est une coupe de la plaque modèle selon l'axe d'un des modèles, en position sortie;
- la figure 2 est une coupe correspondante en position rentrée;
- les figures 3 et 4 représentent des détails à plus grande échelle, respectivement, des figures 1 et 2.
- Figure 1 is a section of the model plate along the axis of one of the models, in the extended position;
- Figure 2 is a corresponding section in retracted position;
- Figures 3 and 4 show details on a larger scale, respectively, of Figures 1 and 2.
On voit sur les figures la plaque modèle 1 qui comporte en général plusieurs modèles dont un seul est représenté. Sur cette plaque est fixée par des moyens usuels et, éventuellement, encastrée, la pièce extérieure 2 dont la partie dépassant au-dessus du plan de référence 3 de la plaque modèle 1 présente un profil extérieur 4 représentant la forme extérieure de la pièce à obtenir depuis le plan de référence 3 jusqu'au point 5 qui correspond à la naissance du bourrelet en contre-dépouille. Intérieurement, cette pièce extérieure 2 est délimitée par un alésage 6 d'un diamètre légèrement supérieur à l'alésage de la pièce à mouler.The figures show the model plate 1, which generally comprises several models, only one of which is shown. On this plate is fixed by usual means and, possibly, embedded, the
On voit d'autre part la pièce intérieure 7 qui est partiellement encastrée dans la plaque modèle 1 et qui est montée mobile axialement pour une faible course parfaitement définie entre des butées mécaniques. Par exemple, en position sortie, représentée sur la figure 1, ces butées peuvent être constituées par les têtes 8 de vis épaulées 9 qui viennent buter sur la plaque modèle sous l'effet de ressorts 10, par exemple concentriques aux vis 9. Dans la position rentrée représentée sur la figure 2, ce peut être tout simplement le dessous de la pièce 7 qui vient buter dans le fond du logement d'encastrement prévu dans la plaque 1. Eventuellement, un guidage central 11 coulissant dans un palier longitudinal 12, peut améliorer le parallélisme du mouvement.We also see the
La pièce intérieure mobile 7 comporte un alésage intérieur borgne 13 dont le diamètre est celui de la pièce à mouler, et dont le fond 14 se trouve, en position rentrée selon la figure 2, au niveau exact du plan de référence 3 de la plaque modèle 1. La surface extérieure 15 de cette pièce intérieure 7 est ajustée pour coulisser à l'intérieur de l'alésage 6 de la pièce extérieure fixe 2, au moins sur toute la hauteur de cette dernière, et la paroi cylindrique 16 de faible épaisseur ainsi ménagée entre les alésages 6 et 13 se termine à son extrémité libre par un rebord 17 dépassant vers l'extérieur sans jamais dépasser le diamètre du cercle 5 représentant la limite du bourrelet.The movable
La partie supérieure de la surface cylindrique 15 de la paroi 16 définit, avec les surfaces en regard 18 du bord supérieur de la pièce fixe 2 et 19 du rebord 17 de la pièce mobile 7, les trois côtés d'une section, de préférence en forme de queue d'aronde, dans laquelle vient s'insérer exactement une bague annulaire 20 en élastomère dont le diamètre extérieur, en position de repos, c'est-à-dire par conséquent dans la position sortie représentée sur la figure 1, ne dépasse pas ou est inférieur au diamètre du cercle 5 défini précédemment, de manière à ne présenter aucune contre-dépouille. Ce diamètre extérieur de la bague 20 est même de préférence légèrement inférieur à celui du cercle 5, de manière à pallier une rémanence toujours possible de la déformation de l'élastomère.The upper part of the
Lorsque l'on utilise une telle plaque modèle dans le procédé habituel de moulage au sable, la pression de compactage du sable, quels que soient la valeur de cette pression, dès lors qu'elle dépasse une valeur minimale et son degré d'homogénéité, a pour effet, en agissant sur la large surface offerte par la pièce 7, de déplacer celle-ci à l'encontre des ressorts 10 vers sa position rentrée de la figure 2, ce qui a pour conséquence de comprimer axialement la pièce annulaire 20 d'une quantité parfaitement définie, et comme cette pièce annulaire 20 est déjà contenue de manière précise sur trois des côtés de sa section dans des pièces mécaniques précises, elle ne peut se déformer que par expansion vers l'extérieur d'une quantité bien définie et selon une géométrie précise, comme illustré sur la figure 4. Naturellement, lors de la décompression présidant à l'extraction du moule ou de la plaque modèle, la bague annulaire 20 reprend sa forme sans contre-dépouille des figures 1 et 3, grâce à son élasticité propre aidée par la force des ressorts 10, ce qui permet cette extraction d'une manière aisée sans risque d'endommager la forme en sable obtenue, et sans exiger de la cohésion de ce sable une dureté particulière.When such a model plate is used in the usual process of sand molding, the pressure of compacting the sand, whatever the value of this pressure, as soon as it exceeds a minimum value and its degree of homogeneity, has the effect, by acting on the large surface offered by the
Naturellement, le moule en sable ainsi constitué est ensuite refermé et on procède à la coulée du métal de la manière habituelle pour fabriquer les pièces qui ont exactement la forme voulue avec une grande précision et une grande régularité de forme.Naturally, the sand mold thus formed is then closed and the metal is poured in the usual way to manufacture the parts which have exactly the desired shape with great precision and great regularity of shape.
Claims (10)
- Pattern plate for making moulds intended for the production by sand casting of window seals or similar articles having an undercut bead, through the use, for the formation of the site for said bead, of an elastomer part which has no undercut and which is deformed towards the outside by means of the compaction pressure of the sand, characterized by the fact that the elastomer part is an annular ring (20) gripped between a fixed exterior part (2) and a axially movable interior part (7).
- Pattern plate according to Claim 1, characterized by the fact that the exterior part (2) is fixed on the plate (1) and has an external profile (4) whose shape, from the reference plane (3) of the pattern plate to the start (5) of the bead, corresponds to the external profile of the desired casting and whose internal surface (6) consists of a bore slightly larger than that of the desired casting.
- Pattern plate according to claim 2, characterized by the fact that the interior part (7) is movable axially over a short path defined by mechanical stops between an extended position, to which it is pushed back by springs (10), and a retracted position which it assumes through the action of said compaction pressure, the external surface (15) of said interior part (7) being adapted to slide exactly in the bore (6) of the fixed exterior part (2), at least over the height of the latter, while said movable part (7) ends at the top in the form of a rim (17) whose diameter does not exceed that of said start (5) of the bead.
- Pattern plate according to Claim 3, characterized by the fact that the annular elastomer ring (20) has a section such that it fits exactly into the space defined by the cylindrical exterior surface (15) of the movable part (7) and the facing surfaces (18, 19) of the end of the fixed part (2) and of the rim (17) of the movable part (7) respectively when the latter is in its extended position, without in these positions extending externally beyond said start (5) of the bead.
- Pattern plate according to one of Claims 3 and 4, characterized by the fact that the movable interior part (7) has a blind internal bore (13) whose diameter is the same as the internal diameter of the required casting and whose bottom, in said retracted position, is exactly level with the reference surface (3) of the pattern plate, so that the compaction pressure of the sand, on the utilization of this pattern plate to form the sand mould, by acting on the entire surface of the movable part (7) has the effect of bringing each movable part (7) into the retracted position against the action of the springs (10) and of compressing the section of the annular ring (20) retained on three sides, in such a manner as to bring about its expansion towards the outside by a perfectly defined amount, and thus to form the site of said bead, while it resumes its original shape having no undercut as soon as extraction starts.
- Pattern plate according to one of the preceding claims, characterized by the fact that the section of the annular elastomer ring (20) and also the site reserved for it between the fixed part (2) and the movable part (7) are dovetail-shaped.
- Pattern plate according to one of Claims 3 to 6, characterized by the fact that the axial mechanical stop defining the extended position is formed by the heads (8) of shouldered screws (9).
- Pattern plate according to Claim 7, characterized by the fact that said return springs (10) are helical compression springs disposed coaxially around at least some of said shouldered screws (9).
- Pattern plate according to one of Claims 3 to 8, characterized by the fact that the mechanical stop of the movable part (7), defining the retracted position of the latter, is formed by the striking of the bottom of the movable part (7) against the bottom of the socket embedding said part in the pattern plate (1).
- Pattern plate according to one of the preceding claims, characterized by the fact that the movable part (7) is in addition provided with a central guide (11) sliding axially in a longitudinal bearing (12) in the pattern plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT89401935T ATE88930T1 (en) | 1988-07-07 | 1989-07-06 | MODEL PLATE FOR THE DESIGN OF MOLDS, INTENDED FOR THE MANUFACTURE OF GLASS GASKETS BY MEANS OF FOUNDRY SAND WHERE THE PRESENCE OF A BEAD IN THE COUNTERFORM SLOPE. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8809257A FR2633851B1 (en) | 1988-07-07 | 1988-07-07 | MODEL PLATE FOR THE PRODUCTION OF MOLDS FOR THE MANUFACTURE BY SAND FOUNDRY OF ICE JOINTS OR SIMILAR PARTS HAVING A BUCKLE |
| FR8809257 | 1988-07-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0353119A1 EP0353119A1 (en) | 1990-01-31 |
| EP0353119B1 true EP0353119B1 (en) | 1993-05-05 |
Family
ID=9368211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89401935A Expired - Lifetime EP0353119B1 (en) | 1988-07-07 | 1989-07-06 | Pattern plate for realization of moulds destinate for fabrication of glass jointings or similar pieces with foundry sand by presence of a pad within a counter pattern taper |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4952282A (en) |
| EP (1) | EP0353119B1 (en) |
| AT (1) | ATE88930T1 (en) |
| DE (1) | DE68906323T2 (en) |
| ES (1) | ES2040482T3 (en) |
| FR (1) | FR2633851B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106694813A (en) * | 2015-11-13 | 2017-05-24 | 成都兴宇精密铸造有限公司 | Casting assembly mold |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2183667B1 (en) * | 1999-11-19 | 2004-05-16 | Loramendi, S.A. | MOTOR MOLDING MACHINE, PERFECTED. |
| US8373368B2 (en) * | 2009-02-09 | 2013-02-12 | Ioan Achiriloaie | Energy storage device |
| CN104985115B (en) * | 2015-06-30 | 2017-12-26 | 重庆市合川区云天机械制造有限公司 | Make the collapsible mold of fuel feed pump plunger sand mo(u)ld |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3624758A (en) * | 1968-07-12 | 1971-11-30 | Caterpillar Tractor Co | Method of making a sand mold with a back draft |
| US3570585A (en) * | 1969-04-25 | 1971-03-16 | Caterpillar Tractor Co | Pattern for making mold with a back draft |
| US3773100A (en) * | 1969-12-01 | 1973-11-20 | Hooker Chemical Corp | Molding box comprising pattern frame having internal lining strips |
| BE786750A (en) * | 1971-07-26 | 1973-01-26 | Caterpillar Tractor Co | Rubber film mold core with return. |
| DE2940171C2 (en) * | 1979-10-04 | 1984-04-05 | Goetze Ag, 5093 Burscheid | Model for making casting molds |
| AU544242B2 (en) * | 1980-10-20 | 1985-05-23 | Deere & Company | Inserting cores |
| DE3602049A1 (en) * | 1986-01-24 | 1987-07-30 | Goetze Ag | Pattern for the manufacture of casting moulds |
-
1988
- 1988-07-07 FR FR8809257A patent/FR2633851B1/en not_active Expired - Lifetime
-
1989
- 1989-07-06 EP EP89401935A patent/EP0353119B1/en not_active Expired - Lifetime
- 1989-07-06 US US07/376,008 patent/US4952282A/en not_active Expired - Fee Related
- 1989-07-06 DE DE8989401935T patent/DE68906323T2/en not_active Expired - Fee Related
- 1989-07-06 ES ES198989401935T patent/ES2040482T3/en not_active Expired - Lifetime
- 1989-07-06 AT AT89401935T patent/ATE88930T1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106694813A (en) * | 2015-11-13 | 2017-05-24 | 成都兴宇精密铸造有限公司 | Casting assembly mold |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2040482T3 (en) | 1993-10-16 |
| DE68906323T2 (en) | 1993-08-19 |
| FR2633851B1 (en) | 1991-05-17 |
| FR2633851A1 (en) | 1990-01-12 |
| EP0353119A1 (en) | 1990-01-31 |
| DE68906323D1 (en) | 1993-06-09 |
| US4952282A (en) | 1990-08-28 |
| ATE88930T1 (en) | 1993-05-15 |
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