EP0000755B1 - Verfahren zur Herstellung von Formkörpern aus verstärktem Kunststoff und Vorrichtung zur Durchführung des Verfahrens - Google Patents

Verfahren zur Herstellung von Formkörpern aus verstärktem Kunststoff und Vorrichtung zur Durchführung des Verfahrens Download PDF

Info

Publication number
EP0000755B1
EP0000755B1 EP78100545A EP78100545A EP0000755B1 EP 0000755 B1 EP0000755 B1 EP 0000755B1 EP 78100545 A EP78100545 A EP 78100545A EP 78100545 A EP78100545 A EP 78100545A EP 0000755 B1 EP0000755 B1 EP 0000755B1
Authority
EP
European Patent Office
Prior art keywords
process according
sheathing
reinforcing material
container
impregnating
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
Application number
EP78100545A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0000755A1 (de
Inventor
Walter Schwarz
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.)
Individual
Original Assignee
Individual
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 AT577977A external-priority patent/AT353003B/de
Priority claimed from AT0137078A external-priority patent/AT364165B/de
Application filed by Individual filed Critical Individual
Publication of EP0000755A1 publication Critical patent/EP0000755A1/de
Application granted granted Critical
Publication of EP0000755B1 publication Critical patent/EP0000755B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
    • B29C70/443—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding and impregnating by vacuum or injection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/80—Component parts, details or accessories; Auxiliary operations
    • B29C53/8008—Component parts, details or accessories; Auxiliary operations specially adapted for winding and joining
    • B29C53/8066—Impregnating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/36—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and impregnating by casting, e.g. vacuum casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/10—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies
    • B29C43/12—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies using bags surrounding the moulding material or using membranes contacting the moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/24—Pipe joints or couplings
    • B29L2031/243—Elbows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/24—Pipe joints or couplings
    • B29L2031/246—T-joints

Definitions

  • FR-PS 1 518 499 has disclosed a process for the production of building boards.
  • the procedure is such that a non-hardenable material is poured onto the bottom of a shape corresponding to the plate shape to a height of between 1-10 mm.
  • a granular filling material is then poured onto this non-hardenable material.
  • the grains of the filling material penetrate more or less strongly into the non-hardening material located at the bottom of the mold.
  • a binder made of hardenable plastic is poured onto the filling material. This binder penetrates the filler material, but not the non-hardening material at the bottom of the mold.
  • the body (plate) consisting of the filling material and the non-hardening material is removed from the mold and afterwards the non-hardening material is removed from the filling material which is permeated with the binding agent. In this way, a structured plate surface is achieved.
  • GB-PS 1 108 595 describes a method for producing high-voltage insulators. This method also makes use of a prefabricated die, the inner shape of which corresponds to the outer shape of the insulating body to be produced.
  • the casting mold consists of two parts, which are held together by bolts which penetrate a flange protruding from the joint. Parts, e.g. B. absorbent inserts, which are then encapsulated by plastic.
  • B. absorbent inserts which are then encapsulated by plastic.
  • Body from z. B. curable plastic such as polyester, epoxy or the like., which are reinforced z. B. with fibers or fabric structures, have been made either by the so-called wet process, or by the so-called dry process.
  • the fibers impregnated with the hardenable plastic are placed on a mandrel, e.g. B. the fibers are in strand form (rovings) by winding, if the fibers are in the form of fabric by placing them on the mold wall and then rolling them on, whereby compression or removal of any air bubbles is to be achieved.
  • the compression or freedom from air bubbles that can be achieved in this way is, however, limited and uncontrollable, so that a constant quality cannot be achieved.
  • the fibers are first brought into the desired shape, e.g. B. wound on a mandrel, and only then soaked with the plastic.
  • desired shape e.g. B. wound on a mandrel
  • plastic In order to achieve a particularly good compression or freedom from air bubbles, it has become known to insert such a fiber roll, which is seated on a male part (mold core), into a female mold (mold), first of all to evacuate it, then fill with the plastic, press it into the mold and harden it, if necessary even under pressure.
  • the amount of mold required is considerable: not only must each mold be vacuum and pressure-tight, as well as supply and discharge lines, but it is also occupied by the curing time of the plastic, considerable time. As a rule, a large number of expensive molds must be purchased for industrial production.
  • the present invention has therefore set itself the goal of creating a method and an apparatus with the aid of molded articles from z.
  • B. fiber-reinforced plastics can be produced relatively cheap and still reproducible in the highest quality.
  • This is based on a process for the production of molded articles made of reinforced plastic, in which a body formed from reinforcing material is impregnated with plastic, gelled or allowed to harden in a casing which at least corresponds to the contours of the body, in accordance with the invention that from the Reinforcing material existing body before or after its impregnation with the plastic, to form the shell at least outside of the liquid material, which is immiscible with the impregnation material and which forms the female and / or male, is brought into contact and enclosed and the outer material if necessary, it is allowed to solidify and is removed again after the impregnation material has gelled or hardened.
  • the casing is formed from a practically unsustainable, reusable material and can - if necessary - also be converted into the solid state, so that it can be used in the liquid as well as in the solid state of an under or Withstands overpressure of any height.
  • the coating liquid attaches itself to any form of reinforcement, no matter how complicated, and covers it completely and seamlessly. Therefore, when using the method according to the invention, the otherwise necessary maintenance of the very expensive, tolerance-dependent, divided prefabricated impregnation molds (matrices / patrices) of a traditional type is omitted. If the moldings are produced by the method according to the invention, they can be removed without damage as soon as they are removed are fixed in shape.
  • the close contact of the preferably pressurized coating liquid to the molded body, or in the event that the coating liquid is allowed to solidify, the solid molded casing thus formed, which is under shrink tension, can process a high proportion of reinforcing material for the molded body, ensuring a complete Impregnation then any high or low pressure can be applied. In this way, at most strength values can be achieved.
  • the method according to the invention enables industrial series production of bodies of any shape, size and of any reinforcing material, with consistently reproducible top quality, with bodies of different structures with regard to the reinforcing material used and also different sizes and shapes being able to be produced simultaneously.
  • the method according to the invention can be carried out in a closed system which prevents the working personnel from coming into contact with vapors which are harmful to health, as a result of which healthy working conditions can be offered.
  • the prepared bodies made of the reinforcing material are coated with a self-forming, temperature-resistant and dense coating liquid which is tight and pressure-tight, and which can be left in the liquid state but can also be converted into the solid state. Since the molded body is encased in liquid material, there are no joints.
  • the molded casing is removed after the impregnation material has gelled or hardened. If it has solidified, the removal can be done e.g. B. by melting, dissolving, cutting or smashing by ultrasound. The material of the molded cover can be used again and again.
  • low-melting alloys have proven to be particularly useful. Not only does their high density result in particularly good gelling on the body from the reinforcement material and penetration into relatively inaccessible undercuts and the like. Like., Which would be particularly difficult to manufacture with the means of conventional mold construction, but such an alloy can be converted into the solid state by slightly lowering the temperature, whereby a rigid, high-pressure-resistant, one-piece and thus free of joints is created for the moldings. A high degree of compaction can be achieved. The melting point of the material for the coating is below the temperature resistance of the hardened plastic (impregnation material).
  • Eutectic mixtures of bismuth, lead, tin, cadmium and antimony can be used as alloys; they can be set very precisely to a certain desired melting point.
  • Wimut-tin-lead-cadmium-indium alloys there are those whose enamel point is at 47 ° C.
  • Special bismuth-lead-cadmium alloys e.g. B. have a melting point of 92 ° C, bismuth-tin-zinc alloys of 130 ° C.
  • the melting point of tin-lead-cadmium alloys is 145 ° C; a melting point of 221 ° C can be achieved with tin-silver alloys, with cadmium-antimony alloys that of 292 ° C.
  • spacers, inserts, supporting structures or the like made of strong materials which are resistant to the covering liquid and can withstand the relevant temperature stress can be used .
  • fiber strands, staple fibers, fabrics, wires, flakes, whiskers and the like can be used in a manner known per se.
  • Made of plastic, glass, textile, carbon, asbestos or metal e.g. steel, beryllium etc.
  • This material is applied in a manner adapted to the respective shapes on a base body which is also known per se, for. B. by winding, spraying, electrostatic fixation or the like.
  • the base body can remain as a male part in the finished molded body during the implementation of the method according to the invention, i. H. form a kind of lost formwork and consist of - possibly reinforced - plastic, a suitable liner or the like.
  • the base body can also be removed from the molded body before or after its impregnation. If a fiber wrap is designed so that it has sufficient strength for handling during impregnation or wrapping even without the supporting base body, it can be pulled off the base body immediately after winding. Even in the case of complicated basic bodies, it can be found that just one basic body is sufficient.
  • the base body z. B. from thin-walled plaster or glass, from a material such as. B. a low-melting metal alloy, wax or the like, made of evaporable foam, or possibly made of the same material as the coating liquid, which is allowed to solidify in the course of the process.
  • the last method in particular has proven to be advantageous because the base body is integrated into the outer shape (formed by the solidified coating liquid) and all problems are avoided which cause different expansion coefficients for different materials on the molded shell and base body.
  • the body made of reinforcing material is encased with the enveloping material in the liquid state, whereupon, after it has solidified, the impregnation material is impregnated through recessed inlet and outlet openings.
  • the body made of the reinforcing material is coarse-pored, it is expedient to remove it from the inlet and outlet openings, e.g. B. by powder coating, with a pore-sealing coating. In this way, penetration of the coating liquid into the body made of reinforcing material is reliably prevented.
  • the body made of reinforcing material - optionally on the base body - is immersed and soaked in a bath made of the impregnating material after a preferred degassing; the excess impregnation material is then displaced by the coating liquid, the soaked molded body is gelled or cured, and the coating liquid is then removed again.
  • the bodies of reinforcing material are placed under vacuum before immersion in the bath and / or after immersion in the bath - e.g. B. for a few minutes - under higher pressure (z. B. 10 bar and above) if the container used is designed as an autoclave. For comparatively much lower pressures, very elaborate mold designs had to be chosen so far.
  • the method according to the invention can preferably be carried out in a device in which according to the invention a supply and discharge line for the impregnating material and a supply and discharge line for the coating liquid are arranged in a container, which can be placed under vacuum and / or pressure, respectively a grid or the like is arranged in the interior of the container to prevent the shaped bodies from floating.
  • the coating liquid is kept in a liquid state of aggregation based on the duration of the process.
  • the device can even be designed simply for a fully automatic sequence of the method and is only to be set up for an exchange of the liquids (impregnating material and coating liquid).
  • the method according to the invention can be carried out particularly expediently in a device in which removal of the coating liquid from the container is avoided.
  • a device which can be placed under vacuum and / or pressure is designed as a vessel which can be pivoted at least 180 ° about its longitudinal axis and in which the Coating liquid remains and the container has an inlet and outlet line for the impregnation material.
  • Fig. 1 shows a body 1 formed as a fitting made of reinforcing material, which is provided with attached end pieces 2 (funnel) for the supply and discharge of the impregnating material 2 (impregnating resin).
  • the body 1 is located inside a solid casting jacket 4.
  • the body 1 also has a base body 5 (core) in its interior.
  • the coating material is poured, which forms the mold shell 6 for the body 1 after solidification.
  • the base body can consist of solid, liquefiable or gasifiable material.
  • moldings can be produced from reinforced plastic as follows:
  • the procedure is explained here for the production of elbows (pipe bends), for example.
  • the body (angle pieces) 1 consisting of the reinforcement material are first inserted together with the base body 5 (core) into two plate-shaped connecting pieces 24 and 25.
  • the connecting pieces 24 and 25 have feed and discharge openings 26 and 26 'which lead through the plates 24, 25 and open into the two end faces of the body 1 made of reinforcing material.
  • the connector 24 is shown with two bodies 1 made of reinforcing material used there. However, any number of bodies made of reinforcing material can also be used in a connecting piece 24.
  • the bodies 1 made of the reinforcing material are inserted into the connecting pieces 24 and 25, they are inserted into a container 22, which is then closed with a lid 23.
  • the container 22 is then fed via a supply line 14 provided with a valve, the wrapping material to form the mold shell 6.
  • the air escapes through a ventilation line 14 '.
  • the impregnation material 3 is supplied via a valve-provided supply line 8 through the cover 23 through a space 24 'or the connector 24 and passes through the supply openings 26 in the connector 24 to the upper end face of the body 1 made of reinforcing material, passes through and passes over the openings 26 'in the connection 25 again come into a space 25' from where it can be drawn off via a discharge line provided with a valve 20.
  • this material can - if the wrapping material has been kept in a liquid state - be drawn off via a discharge line 21 provided with a valve.
  • the rigid mold shell 6, together with the connecting pieces 24 and 25 and the cast-in, already soaked bodies 1 made of reinforcing material are removed from the container 22 and the molded shell 6 is melted off or otherwise removed (For example, by smashing if it is glass-like material), which then the body 1 made of reinforced plastic are free.
  • the base body 5 can also be melted out or removed from the interior of the body 1 by gasification depending on the material from which it is made.
  • the method according to the invention can be carried out as follows:
  • the bodies 1 ′ made of reinforcing material are placed in a vacuum and pressure-tight container on a grid 17 (grate) and covered with a further grid 19.
  • a vacuum line 12 for degassing the contents of the container, in particular the body 1 'made of reinforcing material is opened.
  • the vacuum line 12 is closed and the valve in the feed line 8 for impregnation material 3 is opened.
  • the impregnating material 3 located in a storage container 9 was previously degassed by applying negative pressure to a line 10 opening into the storage container.
  • the impregnation material 3 pours into the container without bubbles and via the reinforcing body 1 'and is allowed to flow into the container 7 up to the level of the grid 19 or the mouth of the discharge line 20.
  • a pressure line 11 is opened, and the impregnation material in the liquid state in the container 7 is pressurized, whereby a uniform impregnation of the body 1 'from the reinforcement material is achieved.
  • the valve in the pressure line 11 is closed again and the container 7 is vented.
  • the valve 14 in the supply line for the coating liquid 16 is now opened and the coating liquid (liquid metal) flows out of a vessel 15 into the container 7, the coating liquid 16 being the impregnating material in the container 7, insofar as it is not in the body 'is made of reinforcing material, displaced to the outside via the discharge line 20.
  • the grid 19 prevents the body 1 'impregnated with the impregnation material from floating in the coating liquid.
  • the coating liquid 16 is also allowed to rise to the level of the grid 19.
  • a two-function valve 21 ' is arranged. In the position shown in FIG. 1, it serves to ventilate the interior of the container during emptying; in the position according to FIG., however, for the removal of the coating liquid 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Moulding By Coating Moulds (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
EP78100545A 1977-08-05 1978-07-28 Verfahren zur Herstellung von Formkörpern aus verstärktem Kunststoff und Vorrichtung zur Durchführung des Verfahrens Expired EP0000755B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AT5779/77 1977-08-05
AT577977A AT353003B (de) 1977-08-05 1977-08-05 Verfahren und vorrichtung zur herstellung von koerpern aus verstaerktem kunststoff
AT1370/78 1978-02-24
AT0137078A AT364165B (de) 1978-02-24 1978-02-24 Verfahren und vorrichtung zur herstellung von formkoerpern aus verstaerktem haertbaren kunststoff

Publications (2)

Publication Number Publication Date
EP0000755A1 EP0000755A1 (de) 1979-02-21
EP0000755B1 true EP0000755B1 (de) 1981-12-16

Family

ID=25595673

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78100545A Expired EP0000755B1 (de) 1977-08-05 1978-07-28 Verfahren zur Herstellung von Formkörpern aus verstärktem Kunststoff und Vorrichtung zur Durchführung des Verfahrens

Country Status (7)

Country Link
US (1) US4209482A (it)
EP (1) EP0000755B1 (it)
JP (1) JPS5463174A (it)
AU (1) AU530925B2 (it)
CA (1) CA1124979A (it)
DE (1) DE2861443D1 (it)
IT (1) IT1097579B (it)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5000990A (en) * 1985-08-22 1991-03-19 The Budd Company One piece molded composite part and method of manufacture
CA1290562C (en) * 1986-01-22 1991-10-15 Takeshi Imura Process for producing cylindrical reinforcing fibrous molding
US4740346A (en) * 1986-02-26 1988-04-26 The Budd Company Perimeter resin feeding of composite structures
US5037691A (en) * 1986-09-15 1991-08-06 Compositech, Ltd. Reinforced plastic laminates for use in the production of printed circuit boards and process for making such laminates and resulting products
US4943334A (en) * 1986-09-15 1990-07-24 Compositech Ltd. Method for making reinforced plastic laminates for use in the production of circuit boards
CH672611A5 (it) * 1987-04-30 1989-12-15 Fischer Ag Georg
US5344038A (en) * 1988-10-14 1994-09-06 The Budd Company Composite fuel tank
US5470517A (en) * 1994-12-09 1995-11-28 Conley; Ed Method of pultrusion
ATE303890T1 (de) * 2001-07-18 2005-09-15 Klaus Dr-Ing Wenderoth Verfahren und vorrichtung zur herstellung von formkörpern
US6830079B1 (en) 2003-08-27 2004-12-14 General Electric Company Integrated apparatus and method for filling porous composite preforms
US8734925B2 (en) 2011-10-19 2014-05-27 Hexcel Corporation High pressure molding of composite parts
DE102012112937A1 (de) * 2012-12-21 2014-06-26 Leichtbau-Zentrum Sachsen Gmbh Vorrichtung und Verfahren zur Herstellung einer Feder aus Faserverbundwerkstoff

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2744043A (en) * 1950-01-23 1956-05-01 Fels & Company Method of producing pressure containers for fluids
US3113897A (en) * 1958-12-05 1963-12-10 Honningstad Birger Method and apparatus for making fiber reinforced plastic tubes
BE593027A (it) * 1959-07-17 1900-01-01
GB1108595A (en) * 1964-05-15 1968-04-03 Reyrolle A & Co Ltd Improvements relating to casting of high-voltage electrical insulating, etc.
US3255284A (en) * 1965-01-15 1966-06-07 American Biltrite Rubber Co Process of curing garden hose
FR1518499A (fr) * 1966-04-13 1968-03-22 Anfi As Procédé pour l'obtention d'éléments de construction de panneaux, de poteaux ou autres objets, et objets ainsi obtenus
SE364212B (it) * 1971-12-01 1974-02-18 Landstingens Inkopscentral
BE794780A (fr) * 1972-01-31 1973-05-16 Precision Flexmold Appareil pour le moulage d'objets
CH542037A (de) * 1972-11-09 1973-09-30 Micafil Ag Verfahren zum Umgiessen von Teilen, insbesondere imprägnierten Teilen elektrischer Geräte und/oder deren Komponenten mit Kunstharz
DE2520853C3 (de) * 1975-05-10 1979-01-18 Pahl'sche Gummi- Und Asbest-Gesellschaft Paguag Gmbh & Co, 4000 Duesseldorf Verfahren und Vorrichtung zum kontinuierlichen Herstellen eines Druckschlauches

Also Published As

Publication number Publication date
EP0000755A1 (de) 1979-02-21
IT7826305A0 (it) 1978-07-31
AU530925B2 (en) 1983-08-04
DE2861443D1 (en) 1982-02-11
AU3851478A (en) 1980-02-07
CA1124979A (en) 1982-06-08
JPS6241099B2 (it) 1987-09-01
US4209482A (en) 1980-06-24
JPS5463174A (en) 1979-05-21
IT1097579B (it) 1985-08-31

Similar Documents

Publication Publication Date Title
EP0000755B1 (de) Verfahren zur Herstellung von Formkörpern aus verstärktem Kunststoff und Vorrichtung zur Durchführung des Verfahrens
DE60111190T2 (de) Verfahren und vorrichtung zur herstellung von gegossenen schaumkörpern
DE102013106876A1 (de) Formkern und Verfahren zum Herstellen von faserverstärkten Strukturhohlbauteilen
DE10342867B4 (de) Verfahren zur Herstellung eines wasserlöslichen Formkerns
DE2535923C3 (de) Verfahren und Form zum Einkapseln elektrischer Bauteile
DE2109553A1 (de) Formkerne fur Hochtemperatur und Druckformen und Verfahren zur Herstellung derartiger Materialien
DE4325563A1 (de) Verfahren zur Herstellung eines Gegenstandes unter Verwendung eines Nichtsandkernes, hierdurch hergestellter Gegenstand und Kern zur Durchführung des Verfahrens
EP0041725A1 (de) Verfahren und Vorrichtung zur Herstellung nahtlos in einem Stück gefertigter allseitig geschlossener Hohlkörper aus kaltformbarem und härtbarem bzw. härtendem Material
DE202016007939U1 (de) Wasserlöslicher Formkern
DE1255240B (de) Formschale fuer das Praezisionsgiessverfahren mit verlorenen Modellen und Verfahren sowie Vorrichtung zur Herstellung derselben
WO2008034687A1 (de) Verfahren zur herstellung eines warmwasserspeichers
DE2352492B2 (de) Verfahren zur herstellung von durch unterdruck stabilisierten, hohlen giessformen
DE2054290A1 (de) Verfahren und Vorrichtung zur Herstellung von Formkörpern aus faserverstärktem Kunststoff, insbesondere von Fittings. A.nm·. Integra.! Ltui\istciÄbe.d&tf GeifcUschaft mbH, Wien
DE2430408A1 (de) Verfahren und vorrichtung zum herstellen einer form
EP0660765B1 (de) Verfahren zur herstellung von faserverbund-feingussteilen
DE3728918A1 (de) Gusskoerpermodell und verfahren zum herstellen eines hohlen gusskoerpers
DE4021591C2 (it)
DE2822409C2 (de) Verfahren zum Herstellen von Körpern aus Kunststoff
EP0241491A1 (de) Formwerkzeug, insbesondere für die verarbeitung von kunstoff- und kunstharzbeton- oder -mörtel-formmassen.
EP0679489A2 (de) Stabförmiger Gegenstand sowie Verfahren und Vorrichtung zur Herstellung von verrottungsfesten Gegenständen
DE2537144A1 (de) Verfahren zur herstellung eines behaelters aus kunststoff, insbesondere eines heizoel-lagerbehaelters
DE1910627A1 (de) Vorformling und Verfahren zur Herstellung von Gegenstaenden aus gefuellten und gepressten Kunststoffen
DE1584396A1 (de) Verfahren zur masshaltigen Herstellung von Formstuecken aus Faserzement
DE2134389A1 (de) Verfahren zum Herstellen von Form teilen aus Polyimidharzen
AT364165B (de) Verfahren und vorrichtung zur herstellung von formkoerpern aus verstaerktem haertbaren kunststoff

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE CH DE FR GB LU NL SE

17P Request for examination filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): BE CH DE FR GB LU NL SE

REF Corresponds to:

Ref document number: 2861443

Country of ref document: DE

Date of ref document: 19820211

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19820731

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19840930

Year of fee payment: 7

Ref country code: SE

Payment date: 19840930

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19870731

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19890728

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19890729

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19890731

BERE Be: lapsed

Owner name: SCHWARZ WALTER

Effective date: 19890731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19900201

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19900712

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19901018

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Effective date: 19910731

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19920330

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19920331

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19930401

EUG Se: european patent has lapsed

Ref document number: 78100545.9

Effective date: 19900418

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT