EP1740361A2 - Procede et dispositif de fabrication d'articles moules en plastique pourvus d'une cavite interne, par injection de liquide, en particulier d'eau, et dispositif d'injection de liquide associe - Google Patents

Procede et dispositif de fabrication d'articles moules en plastique pourvus d'une cavite interne, par injection de liquide, en particulier d'eau, et dispositif d'injection de liquide associe

Info

Publication number
EP1740361A2
EP1740361A2 EP05736015A EP05736015A EP1740361A2 EP 1740361 A2 EP1740361 A2 EP 1740361A2 EP 05736015 A EP05736015 A EP 05736015A EP 05736015 A EP05736015 A EP 05736015A EP 1740361 A2 EP1740361 A2 EP 1740361A2
Authority
EP
European Patent Office
Prior art keywords
liquid
plastic
cavity
pressure
mold cavity
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.)
Withdrawn
Application number
EP05736015A
Other languages
German (de)
English (en)
Inventor
David c/o Bauer Compresseurs S.A.R.L. BATON
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.)
Bauer Compresseurs Sarl
Original Assignee
Bauer Compresseurs Sarl
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
Application filed by Bauer Compresseurs Sarl filed Critical Bauer Compresseurs Sarl
Publication of EP1740361A2 publication Critical patent/EP1740361A2/fr
Withdrawn legal-status Critical Current

Links

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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • B29C45/1706—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles using particular fluids or fluid generating substances
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1734—Nozzles therefor
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • B29C45/1706—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles using particular fluids or fluid generating substances
    • B29C2045/1707—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles using particular fluids or fluid generating substances using a liquid, e.g. water
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • B29C45/1711—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles and removing excess material from the mould cavity by the introduced fluid, e.g. to an overflow cavity
    • B29C2045/1712—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles and removing excess material from the mould cavity by the introduced fluid, e.g. to an overflow cavity plastic material flowing back into the injection unit
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • B29C45/1711—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles and removing excess material from the mould cavity by the introduced fluid, e.g. to an overflow cavity
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1732—Control circuits therefor

Definitions

  • the invention is concerned with a method and a device for producing molded plastic parts with an internal cavity and with a liquid injection device therefor.
  • the invention aims to provide a method and an apparatus for the production of plastic molded parts with an internal cavity, which allows the production of plastic molded parts with an internal cavity by using a liquid instead of gas, in particular water, while overcoming the difficulties described above.
  • a liquid injection device is also to be provided, which can be used in a simple manner in the production by means of liquid injection.
  • a method for producing molded plastic parts with an internal cavity by injecting liquid, in particular water, into a plastic compound injected into a mold cavity is provided for this purpose, which is characterized in that in order to produce the internal cavity in the plastic injected into the mold cavity.
  • mass the liquid is entered in a dynamic phase according to a closed regulation under control of the liquid flow according to speed, mass and / or volume, and then in a subsequent static phase according to a closed regulation the liquid pressure until the final solidification of the molded plastic part with the inner cavity is appropriately maintained in the mold cavity for applying a compression pressure.
  • the liquid flow in the method according to the invention can thus be controlled in the form of a closed control, taking into account speed, mass and / or volume. This allows a sensitive adjustment to the materials to be processed, but also taking their configurations into account.
  • the liquids used here, such as water, are also available at low cost.
  • the liquid pressure is also maintained in a static phase in accordance with a closed regulation, so that the desired compression pressure can be maintained, which is necessary in order to produce the final molded design of the plastic molded part with an internal cavity to give true to form.
  • the liquid volume injected during the dynamic phase, the liquid pressure and other influencing variables such as time are preferably monitored. In this way, one can obtain a precise adjustment and adjustment of the generation of the inner cavity during the dynamic phase.
  • the pressure parameters for the liquid pressure can preferably be selected by the user in the static phase. As a result, in particular depending on the plastic material used, it is produced that sufficient compression pressure is maintained until it solidifies, and that high-quality plastic molded parts with an internal cavity can be produced.
  • the switchover from the dynamic to the static phase is expediently carried out in accordance with one and / or several different influencing variables.
  • This can be an injected volume of liquid, a liquid pressure size, a size of the pressure in the mold cavity, the passage of the plastic mass past a sensor in the mold cavity and / or the time. Suitable parameters can be selected by the user without difficulty.
  • the excess of the plastic mass resulting from the production of the inner cavity in the plastic molded part is led back to the stock feed side or directed into a secondary cavity, so that the sprue is ejected with the plastic molded part produced ,
  • the method according to the invention preferably carries out a rinsing process after each injection cycle, in which the liquid-carrying lines are freed of harmful substances. In this way it is possible to ensure a constant quality in the products manufactured according to the invention.
  • a device for producing plastic molded parts with an internal cavity has a mold cavity, an injection device for injecting the plastic mass of material in the mold cavity, a liquid injection device and a control device for the liquid injection device.
  • the control device for the liquid injection device initiates the liquid flow in a dynamic phase in the form of a closed regulation in accordance with the speed, mass and / or volume.
  • the inner cavity is created in the injected plastic compound in the mold cavity.
  • control device switches over to a static phase, in which the liquid pressure is set and maintained in accordance with a closed control in order to apply a sufficient compression pressure until the plastic molded part has finally solidified in the mold cavity and can be removed from the mold cavity.
  • a static phase in which the liquid pressure is set and maintained in accordance with a closed control in order to apply a sufficient compression pressure until the plastic molded part has finally solidified in the mold cavity and can be removed from the mold cavity.
  • the control device monitors the injected liquid volume, the liquid pressure and / or other variables in the dynamic phase, preferably by means of sensors, by means of external signal transmitters. In this way, different influencing variables can be taken into account in the production of plastic molded parts with an internal cavity when carrying out the dynamic phase.
  • a liquid injection device for a device for producing plastic molded parts with an internal cavity, which is characterized in that it is designed in the form of an injection nozzle and the nozzle tip protrudes into the plastic compound which has previously been injected into a mold cavity.
  • the injection nozzle preferably projects into the interior of the plastic compound in the demolding direction. It is expediently designed as a slide valve which opens only when a liquid under pressure is applied and emits a liquid flow approximately perpendicular to the direction of removal.
  • the injection nozzle is always reliably sealed against the mold cavity and the internal cavity to be created in the plastic molded part. Since the liquid flow is emitted approximately perpendicular to the direction of demolding, difficulties in the demolding of the molded plastic part produced with the inner cavity can be avoided. This also avoids reworking.
  • the injection nozzle of the liquid injection device according to the invention is preferably designed such that it can be operated electrically, electronically, hydraulically, pneumatically or in the form of a combination thereof. Any desired and suitable control for the injection nozzle can thus be provided.
  • the inner cavity is generated dynamically in the injected plastic mass and that closed regulation is carried out in accordance with the speed, mass and / or volume of the liquid in preferred settings of the corresponding liquid flow.
  • the liquid pressure is then maintained in a static phase in accordance with a closed regulation until the plastic molded part has finally solidified.
  • FIGS. 1-3 schematically show the process sequence for producing a molded plastic part with an internal cavity, taking into account the corresponding production phases;
  • FIG. 4 shows a schematic view of an alternative production variant for a molded plastic part with an inner cavity, in which the excess of the plastic mass which arises during the production of the inner cavity is returned to the stock feed side;
  • FIG. 5 schematically shows a device for producing molded plastic parts with an internal cavity according to the invention, by means of which the method according to the invention for producing molded plastic parts with an internal cavity can be carried out and implemented;
  • Figure 6 is a schematic sectional view of a liquid injection device in the form of an injection nozzle.
  • FIG. 1 shows a shape designated overall by 1, in which closed form 1, a mold cavity 2 is formed.
  • a plastic mass 3, for example a polymer, is injected into this mold cavity 2 formed by the mold 1, as shown in FIG. 1.
  • the injection is indicated in Figure 1 with an arrow.
  • the plastic compound 3 is completely filled, and the plastic compound is shown schematically in FIG. 1 as 3.
  • an internal cavity 4 is gradually formed in the injected plastic compound 3, which is achieved, for example, with the aid of a liquid injection device, not shown there.
  • the liquid injection device is dynamically controlled by means of a control device, a liquid flow being initiated in the form of a closed regulation in accordance with the speed, mass and / or volume.
  • a part of the previously injected plastic compound 3 is displaced from the mold cavity 2 of the mold 1 in this example in the direction of the sprue or a so-called secondary cavity, with the aid of a piston shown schematically -Cylinder arrangement a predetermined pressure control for the generation of the inner cavity 4 is set and made.
  • the displaced, excess plastic mass which is produced during the production of the inner cavity 4 is denoted by 5 in FIGS. 2 and 3.
  • a regulation for the excess plastic mass 5 in the form of a closed loop can be implemented here.
  • Control devices 7 and 8 are indicated schematically in the figures, which can operate electrically, hydraulically, pneumatically and also in the form of combinations thereof in order to influence the corresponding throughputs and pressures in a controlled manner.
  • the control device indicated schematically by 8 illustrates a control system with a closed or open loop.
  • the inner cavity 4 is completely created in the plastic mass 3 by means of the liquid injection device, and the control system goes into process engineering a static phase in which, in accordance with a closed regulation, the liquid pressure is set and maintained until the plastic molded part 10 finally solidifies in the mold cavity 2 in order to apply a compression pressure.
  • the plastic molded part 10 which can be seen schematically in FIG. 3, with the inner cavity 4 shown there, can then be removed from the mold 1, and the displaced, excess plastic mass 5 occurring during the production process of the plastic molded part 10 is removed from the mold after the plastic molded part 10 has been removed 1 removed as a sprue.
  • FIG. 4 schematically illustrates an embodiment variant of a manufacturing method for a molded plastic part with an inner cavity.
  • the same or similar parts are provided with the same reference numerals there.
  • the excess plastic mass 5 displaced during the production of the inner cavity 4 by means of liquid injection is pushed back in the direction of the injection side in the process according to FIG.
  • a molded plastic part 10 with an inner cavity 4 is also produced while realizing a dynamic and a static phase. Switching between these phases is made dependent on the values of monitored parameters.
  • the formation of the inner cavity 4 in a closed loop is influenced as a function of the various cross sections present.
  • parameters such as the volume of the injected liquid or the volume of the displaced plastic mass 5 or the pressure of the liquid in the plastic molded part 10 or the pressure in the mold cavity 2 or, if applicable, the displacement of the displaced plastic mass past a sensor arranged in the mold cavity 2 (not shown) or the time can be monitored.
  • the switchover can be initiated into the static phase depending on one or more of the above parameters.
  • the internal cavity 4 in the plastic molded part 10 is maintained by means of a pressure control.
  • the throughput of the liquid introduced or, in the case of the example according to FIGS. 1 to 3, the increase in the volume of the displaced, excess plastic mass 5 can be taken into account.
  • FIG. 5 schematically shows a device for producing plastic molded parts with an internal cavity, and this figure also serves to explain the process sequence according to the invention in a schematic manner.
  • the mold 1 and the mold cavity 2 are only indicated schematically and the direction of removal is indicated schematically with arrows.
  • Also shown at 20 in total is an injection device for a liquid for producing the inner cavity 4.
  • water is assumed as an example of a liquid.
  • the injection device 20, which is also referred to as a liquid injection device is designed in the form of an injection nozzle 21, the tip of which protrudes into the molding compound 3 injected into the mold cavity 2 in the demolding direction.
  • the injection nozzle 21 is preferably designed in the form of a slide valve which only emits a liquid flow, preferably perpendicular to the demolding direction, when a liquid under pressure is applied, as is indicated schematically in FIG. 5 by an arrow 22.
  • This injection device 20 ensures tightness with regard to the plastic mass and the nozzle tip is in the mold cavity 2 formed by mold 1 in the closed state.
  • This design enables the plastic molded part with internal cavity to be removed from the mold in the direction of removal (indicated by arrows in FIG. 5) without that there is an undercut in the plane of the injector 20.
  • Plastic mass residues on the level of the injection device 20 can hereby be avoided and, in particular, take place an introduction of the liquid flow 22 approximately at right angles to the direction of removal.
  • the injection device 20 comprises a chamber 23 and a chamber 24.
  • the injection device 20 injects liquid in the direction of the arrow 22 in that the liquid in the chamber 23 is pressurized.
  • the piston of the injection device 20 is displaced via a circuit B, and the injection device 20 introduces the liquid into the plastic compound in the mold cavity 2 in accordance with the arrow 22.
  • the injection device 20 comprises a check valve 25, which only allows passage from the chamber 24 to the chamber 23 at a certain operating pressure.
  • the injection device 20 has a decentralized tightness for the liquid to be introduced, so that leakage of the liquid towards the cavity and / or the plastic mass is effectively avoided when a pressure is applied to the liquid in the chamber 23. Via the circuit A schematically indicated in FIG.
  • a pressure is applied to the liquid in the sealed chamber 24 via a schematically indicated control and regulating system 26, a sufficient resultant force being maintained to provide a seal with respect to the molten plastic mass at the level of the injection device 20 and their exit side.
  • the chamber 24 remains reliably sealed if the pressure exerted by the control and regulating system 26 does not exceed the pressure that could result in the check valve 25 opening.
  • circuit B When the liquid escapes into the plastic mass 3 via the circuit B, the circuit B is filled with a liquid and / or gas. After this phase, the control and regulating system 26 applies an excess pressure to the liquid in the chamber 24, so that the check valve 25 opens. The entire circuit B can thus be filled with liquid, while there is a tight seal in the area of the chamber 23.
  • a circuit A ' can also be implemented, in which it is a rinsing phase, which is carried out, for example, after each production of a plastic molded part with an internal cavity, in order to allow the liquid circuit of plastic residues or also of gas to free. As is shown schematically in broken lines in FIG.
  • the liquid is circulated by means of the control and regulating system 26 via the open check valve 25, so that the liquid can be circulated from the chambers 24 and 23 in a kind of short circuit. In this way, plastic residues or other disruptive substances can be removed from the liquid circuit.
  • FIG. 1 An embodiment of an injection device 20 is shown schematically in more detail in FIG.
  • This injection device 20 for the liquid is designed as an injection nozzle 21.
  • the chambers 23 and 24 are also shown there, and the connections for the circuits B and A are indicated schematically.
  • the circuit B thus opens into the chamber 23 and the circuit A is in communication with the chamber 24.
  • the corresponding seals in the injection nozzle 21 are also indicated.
  • a pressure is applied to the liquid in the chamber 23 via the control and regulating system 26 according to FIG.
  • the slide valve of the injection device 20 moves, and liquid can be dispensed at the head end of the injection nozzle 21, as indicated in FIG. 5, in the direction of the arrow 22.
  • the check valve 25 shown in FIG. 5 is closed, so that the liquid can flow out of the chamber 24 independently of the chamber 23.
  • liquid 23 After producing a molded plastic part with an internal cavity in the mold, liquid 23 also contains plastic residues and ventilation air in the chamber. This would be harmful in the next manufacturing cycle for a molded plastic part with an internal cavity. Therefore, an excess pressure is applied to the liquid in the chamber 24 via the control and regulating system 26 to initiate a rinsing cycle, so that the check valve 25 opens.
  • a rinse cycle can go through according to the circuit A ' be during which the injection nozzle 21 is closed by a corresponding tight closure of the chamber 23 and remains.
  • an inner cavity 4 is formed in a plastic mass 3, which is injected into a mold cavity 2 of a mold 1, by influencing the evacuation speed in a closed loop as a function of the existing cross sections and taking into account the pressure resulting therefrom trained in surveillance.
  • a switchover to pressure control takes place in a static phase.
  • the cavity or the inner cavity 4 is formed in a controlled manner by injecting a liquid with a suitable injection device 20.
  • the transition from the dynamic phase with liquid injection, in particular water injection, to the pressure control in a static phase up to the solidification of the plastic molded part 10 to be produced with the inner cavity 4 can take into account the displaced plastic volume, the injected liquid volume, the liquid pressure size, the size of the pressure in the inner cavity 4 , the passage of the plastic mass to a sensor in the mold cavity 2 or depending on the time.
  • the plastic mass is kept under a compression pressure until the end of solidification, which can be controlled by the pressure of the liquid, the pressure generated by the piston of a dynamic sprue (plastic mass displacement) or a movable part in the cavity 4.
  • the liquid throughput is preferably controlled at approximately 0, which is maintained in order to keep the pressure constant isochorically.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

Procédé de fabrication d'articles moulés en plastique pourvus d'une cavité interne, par injection de liquide, en particulier d'eau, dispositif de fabrication d'un tel article moulé en plastique pourvu d'une cavité interne et dispositif d'injection de liquide en forme de buse d'injection. Pour obtenir une cavité interne dans la matière plastique injectée dans la cavité, on introduit du liquide dans une phase dynamique selon une régulation fermée et en commandant le flux de liquide pour ce qui est de sa vitesse, de sa masse et / ou de son volume. Cette phase dynamique est suivie par une phase statique selon une régulation fermée de la pression de liquide jusqu'au durcissement complet de l'article moulé en plastique à cavité interne dans la cavité du moule, pour amener une pression de compression. Dans le dispositif de fabrication d'articles moulés en plastique pourvus d'une cavité interne, un dispositif d'injection (20) de liquide est actionné à l'aide d'un dispositif de commande (26) de manière telle que dans une phase dynamique, un flux de liquide est introduit en régulation fermée pour ce qui est de sa vitesse, de sa masse et / ou de son volume et qu'un passage à une phase statique est opéré, phase dans laquelle la pression de liquide est ajustée et maintenue selon une régulation fermée jusqu'au durcissement complet de l'article moulé en plastique (10) dans la cavité (2) du moule, pour amener une pression de compression. La présente invention concerne également un dispositif d'injection (20) de liquide conçu sous forme d'une buse d'injection (21) dont la pointe fait saillie dans une cavité (2) du moule et dans la matière plastique (3) qui s'y trouve, de préférence dans la direction de démoulage. Cette buse d'injection (21) se présente sous forme d'un robinet à tiroir ne s'ouvrant que sous l'action d'un liquide sous pression et déchargeant un flux de liquide dans le sens de la flèche (22), de préférence verticalement par rapport à la direction de démoulage.
EP05736015A 2004-04-05 2005-04-05 Procede et dispositif de fabrication d'articles moules en plastique pourvus d'une cavite interne, par injection de liquide, en particulier d'eau, et dispositif d'injection de liquide associe Withdrawn EP1740361A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004016703 2004-04-05
DE102005015582A DE102005015582A1 (de) 2004-04-05 2005-04-05 Verfahren und Vorrichtung zur Herstellung von Kunststoffformteilen mit Innenhohlraum mittels Injektion von Flüssigkeit, insbesondere Wasser, und Flüssigkeitseinspritzeinrichtung hierfür
PCT/EP2005/003575 WO2005097458A2 (fr) 2004-04-05 2005-04-05 Procede et dispositif de fabrication d'articles moules en plastique pourvus d'une cavite interne, par injection de liquide, en particulier d'eau, et dispositif d'injection de liquide associe

Publications (1)

Publication Number Publication Date
EP1740361A2 true EP1740361A2 (fr) 2007-01-10

Family

ID=34965737

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05736015A Withdrawn EP1740361A2 (fr) 2004-04-05 2005-04-05 Procede et dispositif de fabrication d'articles moules en plastique pourvus d'une cavite interne, par injection de liquide, en particulier d'eau, et dispositif d'injection de liquide associe

Country Status (3)

Country Link
EP (1) EP1740361A2 (fr)
DE (1) DE102005015582A1 (fr)
WO (1) WO2005097458A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100972512B1 (ko) * 2005-12-29 2010-07-26 엘지디스플레이 주식회사 액정표시패널의 절단방법 및 이를 이용한 액정표시패널의제조방법
CN108527792B (zh) * 2018-04-10 2021-06-08 宁波科隆阁机械有限公司 一种水辅注塑成型带压力检测的注射装置

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139548B (en) * 1983-05-11 1986-11-19 James Watson Hendry Injection moulding
DE3910025A1 (de) * 1989-03-28 1990-10-04 Krauss Maffei Ag Gasverschlussventil und verfahren zum steuern einer mit einem solchen gasverschlussventil versehenen kunststoffverarbeitungsanlage
JP2510318B2 (ja) * 1990-03-20 1996-06-26 積水化学工業株式会社 射出成型用金型
CA2045860C (fr) * 1990-07-19 2002-06-11 Indra R. Baxi Unite de commande de pressurisation
US5750155A (en) * 1992-09-28 1998-05-12 Battenfeld Gmbh Device for the injection molding of plastic objects enclosing hollow spaces and process for operating it
US5511967A (en) * 1994-02-14 1996-04-30 Pebra Gmbh Paul Braun Self-contained gas injector
EP0806272B1 (fr) * 1994-11-25 2002-06-05 Asahi Kasei Kabushiki Kaisha Procede ameliore de moulage par injection permettant de produire des objets creux et moule utilise selon ledit procede
US5744092A (en) * 1995-02-23 1998-04-28 Halgren; Donald N. Axially movable cluster conduits for plastic processing in a screw machine
JP3376751B2 (ja) * 1995-03-30 2003-02-10 豊田合成株式会社 樹脂中空体の製造方法及びその製造装置
GB2389069B (en) * 1999-07-17 2004-05-12 Univ Warwick Gas injection moulding method and apparatus
US6386852B1 (en) * 2000-02-22 2002-05-14 Asc Incorporated Gas assist needle in a molding machine
DE50108653D1 (de) * 2000-08-16 2006-04-06 Geiger Technik Gmbh Durch Flüssigkeiten unterstütztes Spritzgiessen
AT410648B (de) * 2000-10-13 2003-06-25 Engel Austria Gmbh Vorrichtung zum spritzgiessen von kunststoff
DE10114418B4 (de) * 2001-03-23 2005-03-17 Battenfeld Gmbh Verfahren zum Spritzgießen von mindestens einen Hohlraum aufweisenden Formteilen aus wärmehärtendem Kunststoff
GB0110263D0 (en) * 2001-04-26 2001-06-20 Cinpres Ltd Method and apparatus for injection moulding
DE10247823B4 (de) * 2002-10-14 2005-12-29 Battenfeld Gmbh Vorrichtung und Verfahren zum Regeln von Flüssigkeitseingabe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2005097458A2 (fr) 2005-10-20
WO2005097458A3 (fr) 2006-02-16
DE102005015582A1 (de) 2006-01-26

Similar Documents

Publication Publication Date Title
DE102006048252B3 (de) Verfahren und Vorrichtung zur Herstellung eines Verbundbauteils, insbesondere umfassend ein Spritzgussteil mit einer Polyurethan-Beschichtung
EP0393315B1 (fr) Procédé pour mouler par injection des pièces en matière plastique remplies de liquide et appareil pour la réalisation du procédé
EP0390068B1 (fr) Valve d'obturation de gaz et procédé pour la commande d'une installation pourvue d'une telle valve, servant à la transformation de matières plastiques
EP0744266B1 (fr) Procédé et dispositif pour mouler par injection des corps creux soufflés en matière plastique
DE19514070C2 (de) Steuerverfahren für eine Spritzgießvorrichtung
EP0442128B1 (fr) Procédé pour fabriquer des corps moulés à plusieurs couches
DE19613134A1 (de) Verfahren und Vorrichtung zum Herstellen von Kunststoffgegenständen
WO2005097458A2 (fr) Procede et dispositif de fabrication d'articles moules en plastique pourvus d'une cavite interne, par injection de liquide, en particulier d'eau, et dispositif d'injection de liquide associe
DE102020124782A1 (de) Verfahren und Vorrichtung zur additiven Herstellung eines Erzeugnisses
EP1420930B1 (fr) Procede et dispositif de production automatique de plaques minces
DE19651879C2 (de) Verfahren zur Aufbringung des Nachdrucks bei der Herstellung von Spritzlingen
DE102008019246B3 (de) Schließrichtung und Verfahren zum Betrieb einer solchen
DE102005052997A1 (de) Prozeßsteuerung für Gas-unterstützte Spritzgußanwendungen
DE2543877C2 (de) Vorrichtung zum Herstellen von Formteilen aus Homogen- oder Schaumstoffen
AT518860B1 (de) Verfahren zur Herstellung von Kunststoffbauteilen
AT1126U1 (de) Verfahren zum pressen von kunststoff
DE3736046C2 (fr)
DE4134637A1 (de) Verfahren und vorrichtung fuer die begasung einer in eine hohlkammer eines werkzeugs eingefuellten kunststoffschmelze
DE10009827C2 (de) Vorrichtung zum Herstellen von Gegenständen aus thermoplastischem Kunststoff
DE4102971A1 (de) Verfahren zum spritzgiessen von formteilen aus kunststoff
DE3619260C1 (en) Device for producing mouldings from plastics
DE4444579A1 (de) Spritzgießverfahren zum Herstellen von Kunststoffbauteilen
WO2003106136A1 (fr) Procede de moulage par injection de pieces de poids precis et machine de moulage par injection
CH622983A5 (en) Process and device for producing mouldings from plastic
DE19717302A1 (de) Verfahren und Vorrichtung zur Herstellung von Formteilen aus 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

17P Request for examination filed

Effective date: 20061106

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

17Q First examination report despatched

Effective date: 20070207

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20070818