EP1066147A1 - Method for producing a plastic container - Google Patents

Method for producing a plastic container

Info

Publication number
EP1066147A1
EP1066147A1 EP00904924A EP00904924A EP1066147A1 EP 1066147 A1 EP1066147 A1 EP 1066147A1 EP 00904924 A EP00904924 A EP 00904924A EP 00904924 A EP00904924 A EP 00904924A EP 1066147 A1 EP1066147 A1 EP 1066147A1
Authority
EP
European Patent Office
Prior art keywords
blanks
injection molding
manufactured
produced
components
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Withdrawn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
EP00904924A
Other languages
German (de)
French (fr)
Inventor
Dieter Keller
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.)
Siemens AG
Original Assignee
Mannesmann VDO AG
Siemens AG
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 Mannesmann VDO AG, Siemens AG filed Critical Mannesmann VDO AG
Publication of EP1066147A1 publication Critical patent/EP1066147A1/en
Withdrawn legal-status Critical Current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
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/0055—Shaping
    • 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
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/006—Joining parts moulded in separate cavities
    • 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
    • B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
    • 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
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0017—Combinations of extrusion moulding with other shaping operations combined with blow-moulding or thermoforming
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/02—Bending or folding
    • B29C53/08—Bending or folding of tubes or other profiled members
    • 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
    • B29C53/22—Corrugating

Definitions

  • the invention relates to a method for manufacturing a container made of plastic, in which a shell part is manufactured by injection molding and then several shell parts are connected to one another to form the container, the shell parts being produced in one piece with further components.
  • brackets or connecting pieces to be arranged on the containers are manufactured by injection molding. Since the brackets usually have reinforcing struts and the connecting pieces are often curved or have undercuts, the shell parts are usually separated in the area of the components or manufactured in injection molds with a plurality of cores. Alternatively, the components can be produced using a lost-core technique.
  • a disadvantage of the known method is that it is very cost-intensive to use and only very simple components can be manufactured in one piece with the shell parts. For example, a multiplicity of shell parts or a very complex injection mold with several movable cores are required for the container to be manufactured. Therefore, only very small components are usually made with the shell parts, and large and complex-shaped components are separately manufactured and subsequently attached to the shell parts.
  • the invention is based on the problem of further developing a method of the type mentioned at the outset in such a way that the one-piece production of components of almost any design with the shell parts is possible and that it can be used particularly cost-effectively.
  • the subsequent shaping of the blanks makes it possible to manufacture very complicated components.
  • the process according to the invention can be applied very simply to the manufacture of the complicated components.
  • the number of shell parts can be kept particularly low, even with a large number of complicated components for producing the container.
  • the method according to the invention can therefore be used particularly inexpensively.
  • Another advantage of the container provided as a fuel tank with this method is that the number of shell parts to be connected can be kept particularly low. This contributes to a particularly low permeation of the fuel from the fuel tank. Thanks to the method according to the invention, minor changes to the brackets and lines to be arranged on the container can be carried out with particularly low tool complexity during the forming process.
  • Bent connecting pieces can be produced particularly easily with the method according to the invention if the blanks are hot bent for forming. Thanks to the invention, a division of the shell part in the area of the connecting piece is no longer necessary, as in the known method.
  • components to be assembled separately can be attached to the container with particularly little effort if filters, valves or further components to be connected to the container are used before the forming into the blanks.
  • the forming requires a particularly low outlay if the blanks are manufactured with a cross-sectional shape corresponding to the further component by the injection molding process.
  • the manufacture of the shell parts by injection molding enables the use of particularly inexpensive injection molds if the blanks are each injection-molded with a round cross-section and then if the intended cross-section of the respective component is generated by reshaping. This further optimizes the blank for the injection molding process.
  • the intended wall thickness of the component is accordingly also generated during the forming process.
  • the invention further contributes to further reducing the costs in the manufacture of the container if, in the case of lines which are to be produced in one piece with the container, connecting pieces with a closed base region are first produced together with the shell parts and if the base region after removal of the Shellfish is opened. Furthermore, containers can be provided with a different number of lines without changing the injection mold.
  • connection pieces for lines to be connected are often made elastic in a partial area, for example in order not to transmit vibrations from the line to the container.
  • such elastic areas can be easily manufactured in one piece with the container if several different plastics are supplied to the injection mold at different points in order to produce the blank in an injection molding process. The elastic area is then created simply by using a soft plastic at this point.
  • the method according to the invention does not require any cores which can be moved in the injection mold if axially demoldable parts are produced by the injection molding method. As a result, the method according to the invention is particularly cost-effective.
  • FIG. 1a shows a shell part made of plastic by injection molding
  • FIG. 1b shows the shell part from FIG. 1a after shaping
  • FIG. 2a shows a sectional view through a tubular blank of the shell part from FIG. 1a along the line IIIa-IIIa,
  • FIG. 2b shows a sectional view through a line from FIG. 1b along the line 11b-11b
  • 3a shows a further embodiment of the shell part made of plastic by injection molding
  • FIG. 3b the shell part from FIG. 3a after shaping
  • FIG. 4a shows a sectional view through a tubular blank of the shell part from FIG. 3a along the line IVa-IVa
  • Figure 4b is a sectional view through a line from Figure 3b along the line IVb - IVb.
  • FIG. 1a shows a shell part 1 made of plastic by injection molding.
  • the shell part 1 has a flange 2 for connection to a flange of a correspondingly shaped shell part, not shown, for example for producing a fuel tank of a motor vehicle.
  • the shell part 1 has a bulbous region 3 for forming one half of the fuel tank and two tubular blanks 4, 5 protruding therefrom.
  • One of the blanks 4 has three regions 6-8 with different plastics with different strengths. These different areas 6 - 8 can be easily manufactured in an injection mold, not shown, by a plurality of nozzles fed by different plastics. In the drawing, the boundaries of the areas 6 - 8 are marked with dash-dotted lines.
  • the second blank 5 is arranged perpendicular to the flange 2 and is conical. As a result, the second blank 5 can be manufactured in a particularly simple and therefore inexpensive injection mold. The free end of the blank 5 is closed.
  • FIG. 1 b shows the shell part 1 from FIG. 1 a after the blanks 4, 5 have been formed into lines 9, 10.
  • the blank 4 which has the areas 6 - 8 with different strengths, has been stretched and has a bellows 11 in a central area formed by soft plastic and at its free end a connecting piece 12 for a further line.
  • the bellows 11 can be produced, for example, in the blowing process.
  • the one made from the second blank 5 Line 10 is bent several times. Furthermore, the closed end of the line 10 has been opened, for example, with a heated mandrel.
  • FIG. 2a shows the second blank 5 from FIG. 1a in a sectional illustration along the line III-III. It can be seen here that the blank 5 has a round cross section.
  • 2b shows the line 10 from FIG. 1b in a sectional illustration along the line 11b-11b.
  • the line 10 is produced by reshaping the blank 5 from FIG. 2a produced by the injection molding process. Compared to the blank 5, the line 10 has a different cross-sectional shape and a smaller wall thickness.
  • brackets for attaching the container composed of shell parts 1 can be manufactured by injection molding and shaped according to their intended shape.
  • FIG. 3a shows a shell part 13 made of plastic by injection molding with a flange 14 for connection to a further shell part, not shown.
  • the shell part 13 has two tubular blanks 15, 16.
  • the blanks 15, 16 are arranged perpendicular to the flange 14, so that the entire shell part 13 can be produced particularly cost-effectively in an axially demoldable injection mold.
  • FIG. 3b shows the shell part 13 from FIG. 3a after the blanks 15, 16 have been formed.
  • One of the blanks 15 has been formed into a receptacle 17 for a filter element 18.
  • the filter element 18 was first inserted into the blank 15 shown in FIG. 3a and then the blank 15 was reshaped as shown in FIG. 3b, so that the filter element 18 is reliably fastened.
  • the second blank 16 is formed into two parallel lines 19, 20.
  • FIG. 4a shows a sectional view through the second blank 16 from FIG. 3a along the line IVa-IVa.
  • FIG. 4b shows the lines 19, 20 from FIG. 3b in a sectional illustration along the line IVb-IVb. It can be seen here that the blank 16 from FIG. 4a for the production of the lines 19, 20 shown in FIG. 4b has been compressed in its central region along its longest extension.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

According to the inventive method for producing a container consisting of plastic, plastic shell parts (1) are produced first by means of an injection moulding procedure, said shell parts each forming a single part with blanks for lines (9, 10) and fixtures. The lines (9, 10) and fixtures are then produced by deforming the blanks. The method hereby enables complicated shell parts (1) to be produced economically in a simple-structured injection moulding mould.

Description

Beschreibung description
Verfahren zur Fertigung eines Behälters aus KunststoffProcess for manufacturing a plastic container
Die Erfindung betrifft ein Verfahren zur Fertigung eines Behälters aus Kunststoff, bei dem ein Schalenteil im Spritzgußverfahren gefertigt wird und anschließend mehrere Schalenteile untereinander zu dem Behälter verbunden werden, wobei die Schalenteile einteilig mit weiteren Bauteilen gefertigt werden.The invention relates to a method for manufacturing a container made of plastic, in which a shell part is manufactured by injection molding and then several shell parts are connected to one another to form the container, the shell parts being produced in one piece with further components.
Solche Verfahren sind aus der Praxis beispielsweise zur Fertigung von Kraftstoffbehältern oder Scheibenwaschbehältern von Kraftfahrzeugen bekannt. Hierbei werden an den Behältern anzuordnende Halterungen oder Anschlußstutzen im Spritzgußver ahren gefertigt. Da die Halterungen meist Verstärkungsstreben haben und die Anschlußstutzen häufig gebogen sind oder Hinterschneidungen aufweisen, werden die Schalenteile in der Regel im Bereich der Bauteile getrennt oder in Spritzgußformen mit mehreren Kernen gefertigt. Alternativ dazu können die Bauteile mit einer Kernausschmelztechnik erzeugt werden.Such methods are known from practice, for example for the production of fuel tanks or windscreen washer tanks for motor vehicles. In this case, brackets or connecting pieces to be arranged on the containers are manufactured by injection molding. Since the brackets usually have reinforcing struts and the connecting pieces are often curved or have undercuts, the shell parts are usually separated in the area of the components or manufactured in injection molds with a plurality of cores. Alternatively, the components can be produced using a lost-core technique.
Nachteilig bei dem bekannten Verfahren ist, daß es sehr kostenintensiv anzuwenden ist und sich nur sehr einfach gestaltete Bauteile einteilig mit den Schalenteilen fertigen lassen. Beispielsweise sind für den zu fertigenden Behälter eine Vielzahl von Schalenteilen oder eine sehr aufwendige Spritzgußform mit mehreren verfahrbaren Kernen erforderlich. Daher werden meist nur sehr kleine Bauteile mit den Schalenteilen gefertigt und große und kompliziert geformte Bauteile separat gefertigt und nachträglich an den Schalenteilen befestigt.A disadvantage of the known method is that it is very cost-intensive to use and only very simple components can be manufactured in one piece with the shell parts. For example, a multiplicity of shell parts or a very complex injection mold with several movable cores are required for the container to be manufactured. Therefore, only very small components are usually made with the shell parts, and large and complex-shaped components are separately manufactured and subsequently attached to the shell parts.
BESIÄΠGUNGSKDWE Der Erfindung liegt das Problem zugrunde, ein Verfahren der eingangs genannten Art so weiterzuentwickeln, daß es die einteilige Fertigung nahezu beliebig gestalteter Bauteile mit den Schalenteilen ermöglicht und daß es besonders kostengünstig anwendbar ist.BESIÄΠGUNGSKDWE The invention is based on the problem of further developing a method of the type mentioned at the outset in such a way that the one-piece production of components of almost any design with the shell parts is possible and that it can be used particularly cost-effectively.
Dieses Problem wird erfindungsgemäß dadurch gelöst, daß zunächst eines der Schalenteile und Rohlinge für die weiteren Bauteile gemeinsam im Spritzgußverfahren gefertigt werden und daß die weiteren Bauteile anschließend durch eine Umformung der Rohlinge in ihre vorgesehene Form gebracht werden.This problem is solved according to the invention in that firstly one of the shell parts and blanks for the other components are manufactured jointly by injection molding and that the other components are subsequently brought into their intended shape by reshaping the blanks.
Durch die nachträgliche Umformung der Rohlinge lassen sich sehr kompliziert gestaltete Bauteile fertigen. Da die Rohlinge jedoch für den Einsatz des sehr kostengünstigen Spritzgußverfahrens gestaltet werden können, läßt sich das erfindungsgemäße Verfahren sehr einfach auf die Fertigung der komplizierten Bauteile anwenden. Dank der Erfindung läßt sich die Anzahl der Schalenteile selbst bei einer Vielzahl komplizierter Bauteile zur Herstellung des Behälters besonders gering halten. Das erfindungsgemäße Verfahren ist daher besonders kostengünstig anwendbar. Ein weiterer Vorteil des mit diesem Verfahren als Kraftstoffbehälter vorgesehenen Behälters besteht darin, daß sich die Anzahl der zu verbindenden Schalenteile besonders gering halten läßt. Dies trägt zu einer besonders geringen Permeation des Kraftstoffs aus dem Kraftstoffbehälter bei. Dank des erfindungsgemäßen Verfahrens lassen sich kleinere Änderungen der an dem Behälter anzuordnenden Halterungen und Leitungen mit besonders geringem Werkzeugaufwand beim Umformen vornehmen. Das meist sehr kostenintensive Spritzgußwerkzeug kann hierbei unverändert bleiben. Dies führt insbesondere bei einer Fertigung des Behälters in einer Großserie wie in der Automobiltechnik zu einer besonders einfachen Modellpflege und Weiterentwicklung des Behälters. Gebogene Anschlußstutzen lassen sich mit dem erfindungsgemäßen Verfahren besonders einfach herstellen, wenn die Rohlinge zum Umformen warm gebogen werden. Dank der Erfindung ist eine Teilung des Schalenteils im Bereich des Anschlußstutzens wie bei dem bekannten Verfahren nicht mehr erforderlich.The subsequent shaping of the blanks makes it possible to manufacture very complicated components. However, since the blanks can be designed for the use of the very inexpensive injection molding process, the process according to the invention can be applied very simply to the manufacture of the complicated components. Thanks to the invention, the number of shell parts can be kept particularly low, even with a large number of complicated components for producing the container. The method according to the invention can therefore be used particularly inexpensively. Another advantage of the container provided as a fuel tank with this method is that the number of shell parts to be connected can be kept particularly low. This contributes to a particularly low permeation of the fuel from the fuel tank. Thanks to the method according to the invention, minor changes to the brackets and lines to be arranged on the container can be carried out with particularly low tool complexity during the forming process. The mostly very cost-intensive injection molding tool can remain unchanged. This leads to particularly simple model maintenance and further development of the container, in particular when the container is manufactured in large series, such as in automotive engineering. Bent connecting pieces can be produced particularly easily with the method according to the invention if the blanks are hot bent for forming. Thanks to the invention, a division of the shell part in the area of the connecting piece is no longer necessary, as in the known method.
Verbreiterungen in an dem Behälter angeordneten Rohrleitungen und Nebenbehälter zur Aufnahme von Filtern oder Ausgleichsbehälter neben einem Hauptbehälter lassen sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung einfach fertigen, wenn das Umformen im Blasverfahren erfolgt. Solche Nebenbehälter werden beispielsweise bei Kraftstoffbehältern für eine Belüftung oder als Ausgleichskammer häufig benötigt.According to another advantageous development of the invention, widenings in the pipelines and secondary containers arranged on the container for accommodating filters or expansion tanks next to a main container can be easily manufactured if the shaping is carried out using the blowing method. Such secondary tanks are often required for example in fuel tanks for ventilation or as a compensation chamber.
Separat zu montierende Bauteile lassen sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung mit besonders geringem Aufwand an dem Behälter befestigen, wenn vor dem Umformen in die Rohlinge Filter, Ventile oder weitere mit dem Behälter zu verbindende Bauteile eingesetzt werden.According to another advantageous development of the invention, components to be assembled separately can be attached to the container with particularly little effort if filters, valves or further components to be connected to the container are used before the forming into the blanks.
Das Umformen erfordert gemäß einer anderen vorteilhaften Weiterbildung der Erfindung einen besonders geringen Aufwand, wenn die Rohlinge mit einer dem weiteren Bauteil entsprechenden Querschnittsform im Spritzgußverfahren gefertigt werden.According to another advantageous development of the invention, the forming requires a particularly low outlay if the blanks are manufactured with a cross-sectional shape corresponding to the further component by the injection molding process.
Die Fertigung der Schalenteile im Spritzgußverfahren ermöglicht gemäß einer anderen vorteilhaften Weiterbildung der Erfindung den Einsatz von besonders kostengünstigen Spritzgußformen, wenn die Rohlinge jeweils im Spritzgußverfahren mit einem runden Querschnitt gefertigt werden und wenn anschließend der vorgesehene Querschnitt des jeweiligen Bauteils durch Umformen erzeugt wird. Hierdurch wird der Rohling für das Spritzgußverfahren weiter optimiert. Die vorgesehene Wandstärke des Bauteils wird dementsprechend ebenfalls beim Umformen erzeugt.According to another advantageous development of the invention, the manufacture of the shell parts by injection molding enables the use of particularly inexpensive injection molds if the blanks are each injection-molded with a round cross-section and then if the intended cross-section of the respective component is generated by reshaping. This further optimizes the blank for the injection molding process. The intended wall thickness of the component is accordingly also generated during the forming process.
Zur weiteren Verringerung der Kosten bei der Fertigung des Behälters trägt es gemäß einer anderen vorteilhaften Weiterbildung der Erfindung bei, wenn bei einteilig mit dem Behälter zu fertigenden Leitungen zunächst Stutzen mit einem geschlossenen Bodenbereich zusammen mit den Schalenteilen gefertigt werden und wenn der Bodenbereich nach der Entnahme der Schalenteiie geöffnet wird. Weiterhin können hierdurch Behälter ohne Änderung der Spritzgußform mit einer unterschiedlichen Anzahl von Leitungen versehen werden.According to another advantageous development of the invention, it further contributes to further reducing the costs in the manufacture of the container if, in the case of lines which are to be produced in one piece with the container, connecting pieces with a closed base region are first produced together with the shell parts and if the base region after removal of the Shellfish is opened. Furthermore, containers can be provided with a different number of lines without changing the injection mold.
Zur weiteren Verringerung der Kosten bei der Fertigung des Behälters trägt es gemäß einer anderen vorteilhaften Weiterbildung der Erfindung bei, wenn für zwei nebeneinander zu fertigende Leitungen ein einziger rohrförmiger Rohling im Spritzgußverfahren gefertigt wird und wenn anschließend der Rohling entlang seiner längsten Erstreckung zusammengedrückt wird.According to another advantageous development of the invention, to further reduce the costs in the manufacture of the container, if a single tubular blank is produced by injection molding for two lines to be produced next to one another and if the blank is then compressed along its longest extent.
Anschlußstutzen für daran anzuschließende Leitungen werden häufig in einem Teilbereich elastisch gestaltet, um beispielsweise Vibrationen nicht von der Leitung auf den Behälter zu übertragen. Solche elastischen Bereiche lassen sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung einfach einteilig mit dem Behälter fertigen, wenn zur Fertigung des Rohlings im Spritzgußverfahren mehrere verschiedene Kunststoffe an verschiedenen Stellen der Spritzgußform zugeführt werden. Der elastische Bereich wird dann einfach durch den Einsatz eines weichen Kunststoffs an dieser Stelle erzeugt. Das erfindungsgemäße Verfahren benötigt keine in der Spritzgußform verfahrbaren Kerne, wenn im Spritzgußverfahren axial entformbare Teile gefertigt werden. Hierdurch gestaltet sich das erfindungsgemäße Verfahren besonders kostengünstig.Connection pieces for lines to be connected are often made elastic in a partial area, for example in order not to transmit vibrations from the line to the container. According to another advantageous further development of the invention, such elastic areas can be easily manufactured in one piece with the container if several different plastics are supplied to the injection mold at different points in order to produce the blank in an injection molding process. The elastic area is then created simply by using a soft plastic at this point. The method according to the invention does not require any cores which can be moved in the injection mold if axially demoldable parts are produced by the injection molding method. As a result, the method according to the invention is particularly cost-effective.
Zur weiteren Vereinfachung des erfindungsgemäßen Verfahrens trägt es bei, wenn schwenkbare, mit Wellungen versehene Teilstücke der Bauteile beim Umformen erzeugt werden.It contributes to further simplifying the method according to the invention if pivotable, corrugated sections of the components are produced during the forming process.
Die Erfindung läßt zahlreiche Ausführungsformen zu. Zur weiteren Verdeutlichung ihres Grundprinzips sind mehrere davon in der Zeichnung dargestellt und werden nachfolgend beschrieben. Diese zeigt inThe invention permits numerous embodiments. To further clarify its basic principle, several of them are shown in the drawing and are described below. This shows in
Figur 1a ein aus Kunststoff im Spritzgußverfahren gefertigtes Schalenteil,FIG. 1a shows a shell part made of plastic by injection molding,
Figur 1b das Schalenteil aus Figur 1a nach einem Umformen,1b shows the shell part from FIG. 1a after shaping,
Figur 2a eine Schnittdarstellung durch einen rohrförmigen Rohling des Schalenteils aus Figur 1a entlang der Linie lla - lla,FIG. 2a shows a sectional view through a tubular blank of the shell part from FIG. 1a along the line IIIa-IIIa,
Figur 2b eine Schnittdarstellung durch eine Leitung aus Figur 1b entlang der Linie llb - llb,FIG. 2b shows a sectional view through a line from FIG. 1b along the line 11b-11b,
Figur 3a eine weitere Ausführungsform des aus Kunststoff im Spritzgußverfahren gefertigten Schalenteils,3a shows a further embodiment of the shell part made of plastic by injection molding,
Figur 3b das Schalenteil aus Figur 3a nach einem Umformen, Figur 4a eine Schnittdarstellung durch einen rohrförmigen Rohling des Schalenteils aus Figur 3a entlang der Linie IVa - IVa,FIG. 3b the shell part from FIG. 3a after shaping, FIG. 4a shows a sectional view through a tubular blank of the shell part from FIG. 3a along the line IVa-IVa,
Figur 4b eine Schnittdarstellung durch eine Leitung aus Figur 3b entlang der Linie IVb - IVb.Figure 4b is a sectional view through a line from Figure 3b along the line IVb - IVb.
Die Figur 1a zeigt ein aus Kunststoff im Spritzgußverfahren gefertigtes Schalenteil 1. Das Schalenteil 1 hat einen Flansch 2 zur Verbindung mit einem Flansch eines nicht dargestellten, entsprechend geformten Schalenteils beispielsweise zur Herstellung eines Kraftstoffbehälters eines Kraftfahrzeuges. Das Schalenteil 1 hat einen bauchigen Bereich 3 zur Bildung einer Hälfte des Kraftstoffbehälters und zwei davon abstehende, rohrförmig gestaltete Rohlinge 4, 5. Einer der Rohlinge 4 weist drei Bereiche 6 - 8 mit verschiedenen Kunststoffen mit unterschiedlichen Festigkeiten auf. Diese verschiedenen Bereiche 6 - 8 lassen sich in einer nicht dargestellten Spritzgußform durch mehrere von jeweils verschiedenen Kunststoffen gespeisten Düsen einfach fertigen. In der Zeichnung sind die Grenzen der Bereiche 6 - 8 mit strichpunktierten Linien gekennzeichnet. Der zweite Rohling 5 ist senkrecht zu dem Flansch 2 angeordnet und konisch gestaltet. Hierdurch läßt sich der zweite Rohling 5 in einer besonders einfach aufgebauten und damit kostengünstigen Spritzgußform fertigen. Das freie Ende des Rohlings 5 ist verschlossen.FIG. 1a shows a shell part 1 made of plastic by injection molding. The shell part 1 has a flange 2 for connection to a flange of a correspondingly shaped shell part, not shown, for example for producing a fuel tank of a motor vehicle. The shell part 1 has a bulbous region 3 for forming one half of the fuel tank and two tubular blanks 4, 5 protruding therefrom. One of the blanks 4 has three regions 6-8 with different plastics with different strengths. These different areas 6 - 8 can be easily manufactured in an injection mold, not shown, by a plurality of nozzles fed by different plastics. In the drawing, the boundaries of the areas 6 - 8 are marked with dash-dotted lines. The second blank 5 is arranged perpendicular to the flange 2 and is conical. As a result, the second blank 5 can be manufactured in a particularly simple and therefore inexpensive injection mold. The free end of the blank 5 is closed.
Die Figur 1 b zeigt das Schalenteil 1 aus Figur 1a, nachdem die Rohlinge 4, 5 zu Leitungen 9, 10 umgeformt wurden. Der die Bereiche 6 - 8 mit unterschiedlichen Festigkeiten aufweisende Rohling 4 wurde gestreckt und hat in einem mittleren, von weichem Kunststoff gebildeten Bereich einen Faltenbalg 11 und an seinem freien Ende einen Anschlußstutzen 12 für eine weiterführende Leitung. Der Faltenbalg 11 kann beispielsweise im Blasverfahren erzeugt sein. Die aus dem zweiten Rohling 5 hergestellte Leitung 10 ist mehrfach gebogen. Weiterhin ist das verschlossene Ende der Leitung 10 beispielsweise mit einem erwärmten Dorn geöffnet worden.FIG. 1 b shows the shell part 1 from FIG. 1 a after the blanks 4, 5 have been formed into lines 9, 10. The blank 4, which has the areas 6 - 8 with different strengths, has been stretched and has a bellows 11 in a central area formed by soft plastic and at its free end a connecting piece 12 for a further line. The bellows 11 can be produced, for example, in the blowing process. The one made from the second blank 5 Line 10 is bent several times. Furthermore, the closed end of the line 10 has been opened, for example, with a heated mandrel.
Figur 2a zeigt den zweiten Rohling 5 aus Figur 1 a in einer Schnittdarstellung entlang der Linie lla - lla. Hierbei ist zu erkennen, daß der Rohling 5 einen runden Querschnitt hat. In Figur 2b ist die Leitung 10 aus Figur 1 b in einer Schnittdarstellung entlang der Linie llb - llb dargestellt. Die Leitung 10 ist durch Umformen des im Spritzgußverfahren gefertigten Rohlings 5 aus Figur 2a erzeugt. Im Vergleich zu dem Rohling 5 hat die Leitung 10 eine andere Querschnittsform und eine geringere Wandstärke. Selbstverständlich können zusätzlich zu den Leitungen 10 Halterungen zur Befestigung des aus Schalenteilen 1 zusammengesetzten Behälters im Spritzgußverfahren gefertigt und entsprechend ihrer vorgesehenen Form umgeformt werden.FIG. 2a shows the second blank 5 from FIG. 1a in a sectional illustration along the line III-III. It can be seen here that the blank 5 has a round cross section. 2b shows the line 10 from FIG. 1b in a sectional illustration along the line 11b-11b. The line 10 is produced by reshaping the blank 5 from FIG. 2a produced by the injection molding process. Compared to the blank 5, the line 10 has a different cross-sectional shape and a smaller wall thickness. Of course, in addition to the lines 10 brackets for attaching the container composed of shell parts 1 can be manufactured by injection molding and shaped according to their intended shape.
Die Figur 3a zeigt ein aus Kunststoff im Spritzgußverfahren gefertigtes Schalenteil 13 mit einem Flansch 14 zur Verbindung mit einem weiteren nicht dargestellten Schalenteil. Das Schalenteil 13 hat zwei rohrförmige Rohlinge 15, 16. Im Gegensatz zu dem Schalenteil 1 aus Figur 1a sind die Rohlinge 15, 16 senkrecht zu dem Flansch 14 angeordnet, so daß sich das gesamte Schalenteil 13 besonders kostengünstig in einer axial entformbaren Spritzgußform fertigen läßt.FIG. 3a shows a shell part 13 made of plastic by injection molding with a flange 14 for connection to a further shell part, not shown. The shell part 13 has two tubular blanks 15, 16. In contrast to the shell part 1 from FIG. 1a, the blanks 15, 16 are arranged perpendicular to the flange 14, so that the entire shell part 13 can be produced particularly cost-effectively in an axially demoldable injection mold.
Die Figur 3b zeigt das Schalenteil 13 aus Figur 3a nach einem Umformen der Rohlinge 15, 16. Einer der Rohlinge 15 ist zu einer Aufnahme 17 für ein Filterelement 18 umgeformt worden. Hierfür wurde zunächst das Filterelement 18 in den in Figur 3a dargestellten Rohling 15 eingesetzt und anschließend der Rohling 15 wie in Figur 3b dargestellt umgeformt, so daß das Filterelement 18 zuverlässig befestigt ist. Der zweite Rohling 16 ist zu zwei parallel geführten Leitungen 19, 20 umgeformt. Die Figur 4a zeigt eine Schnittdarstellung durch den zweiten Rohling 16 aus Figur 3a entlang der Linie IVa - IVa. Figur 4b zeigt die Leitungen 19, 20 aus Figur 3b in einer Schnittdarstellung entlang der Linie IVb - IVb. Hierbei ist zu erkennen, daß der Rohling 16 aus Figur 4a zur Herstellung der in Figur 4b dargestellten Leitungen 19, 20 in seinem mittleren Bereich entlang seiner längsten Erstreckung zusammengedrückt wurde. FIG. 3b shows the shell part 13 from FIG. 3a after the blanks 15, 16 have been formed. One of the blanks 15 has been formed into a receptacle 17 for a filter element 18. For this purpose, the filter element 18 was first inserted into the blank 15 shown in FIG. 3a and then the blank 15 was reshaped as shown in FIG. 3b, so that the filter element 18 is reliably fastened. The second blank 16 is formed into two parallel lines 19, 20. FIG. 4a shows a sectional view through the second blank 16 from FIG. 3a along the line IVa-IVa. FIG. 4b shows the lines 19, 20 from FIG. 3b in a sectional illustration along the line IVb-IVb. It can be seen here that the blank 16 from FIG. 4a for the production of the lines 19, 20 shown in FIG. 4b has been compressed in its central region along its longest extension.

Claims

Patentansprüche claims
1. Verfahren zur Fertigung eines Behälters aus Kunststoff, bei dem ein Schalenteil im Spritzgußverfahren gefertigt wird und anschließend mehrere Schalenteile untereinander zu dem Behälter verbunden werden, wobei die Schalenteile einteilig mit weiteren Bauteilen gefertigt werden, dadurch gekennzeichnet, daß zunächst eines der Schalenteile und Rohlinge für die weiteren Bauteile gemeinsam im Spritzgußverfahren gefertigt werden und daß die weiteren Bauteile anschließend durch eine Umformung der Rohlinge in ihre vorgesehene Form gebracht werden.1. A method for manufacturing a container made of plastic, in which a shell part is manufactured by injection molding and then several shell parts are connected to one another to form the container, the shell parts being produced in one piece with further components, characterized in that first one of the shell parts and blanks for the other components are manufactured jointly by injection molding and the other components are subsequently brought into their intended shape by reshaping the blanks.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, daß die Rohlinge zum Umformen warm gebogen werden.2. The method according to claim 1, characterized in that the blanks are hot bent for forming.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Umformen im Blasverfahren erfolgt.3. The method according to claim 1 or 2, characterized in that the forming takes place in the blowing process.
4. Verfahren nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß vor dem Umformen in die Rohlinge Filter, Ventile oder weitere mit dem Behälter zu verbindende Bauteile eingesetzt werden.4. The method according to at least one of the preceding claims, characterized in that filters, valves or other components to be connected to the container are used before the shaping into the blanks.
5. Verfahren nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Rohlinge mit einer dem weiteren Bauteil entsprechenden Querschnittsform im Spritzgußverfahren gefertigt werden. 5. The method according to at least one of the preceding claims, characterized in that the blanks are manufactured with a cross-sectional shape corresponding to the further component by injection molding.
6. Verfahren nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Rohlinge jeweils im Spritzgußverfahren mit einem runden Querschnitt gefertigt werden und daß anschließend der vorgesehene Querschnitt des jeweiligen Bauteils durch Umformen erzeugt wird.6. The method according to at least one of the preceding claims, characterized in that the blanks are each produced by injection molding with a round cross section and that the intended cross section of the respective component is then produced by reshaping.
7. Verfahren nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß bei einteilig mit dem Behälter zu fertigenden Leitungen zunächst Stutzen mit einem geschlossenen Bodenbereich zusammen mit den Schalenteilen gefertigt werden und daß der Bodenbereich nach der Entnahme der Schalenteile geöffnet wird.7. The method according to at least one of the preceding claims, characterized in that, in the case of lines which are to be produced in one piece with the container, connecting pieces with a closed bottom region are first produced together with the shell parts and that the bottom region is opened after the shell parts have been removed.
8. Verfahren nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß für zwei nebeneinander zu fertigende Leitungen ein einziger rohrförmiger Rohling im Spritzgußverfahren gefertigt wird und daß anschließend der Rohling entlang seiner längsten Erstreckung zusammengedrückt wird.8. The method according to at least one of the preceding claims, characterized in that a single tubular blank is manufactured by injection molding for two lines to be manufactured side by side and that the blank is then compressed along its longest extent.
9. Verfahren nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zur Fertigung des Rohlings im Spritzgußverfahren mehrere verschiedene Kunststoffe an verschiedenen Stellen der Spritzgußform zugeführt werden.9. The method according to at least one of the preceding claims, characterized in that for the manufacture of the blank by injection molding several different plastics are fed to the injection mold at different points.
10. Verfahren nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß im Spritzgußverfahren axial entformbare Teile gefertigt werden. 10. The method according to at least one of the preceding claims, characterized in that axially demoldable parts are manufactured in the injection molding process.
1. Verfahren nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß schwenkbare, mit Wellungen versehene Teilstücke der Bauteile beim Umformen erzeugt werden. 1. The method according to at least one of the preceding claims, characterized in that pivotable, corrugated portions of the components are generated during the forming.
EP00904924A 1999-01-22 2000-01-18 Method for producing a plastic container Withdrawn EP1066147A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19902430 1999-01-22
DE19902430A DE19902430C2 (en) 1999-01-22 1999-01-22 Process for manufacturing a plastic container
PCT/EP2000/000343 WO2000043186A1 (en) 1999-01-22 2000-01-18 Method for producing a plastic container

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KR (1) KR20010092253A (en)
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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU90796B1 (en) * 2001-06-27 2002-12-30 Delphi Tech Inc Process for injection moulding a connection pipe
DE102006000949B4 (en) * 2006-01-08 2009-11-12 Kunststoff-Fröhlich GmbH Injection molding apparatus or injection molding method for producing an injection molded part with a laterally protruding from a molding wall part pipe
DE102007002600A1 (en) * 2007-01-12 2008-07-17 Mann + Hummel Gmbh Injection molded part with a fold contour and method for producing the injection molded part
DE102015214064A1 (en) * 2015-07-24 2017-01-26 Röchling Automotive SE & Co. KG Tank component with integrally integrated line section
DE102015219980A1 (en) 2015-10-14 2017-04-20 Bayerische Motoren Werke Aktiengesellschaft Container and method for producing a container for liquid equipment of a motor vehicle
DE102015220740B4 (en) 2015-10-23 2022-05-25 Bayerische Motoren Werke Aktiengesellschaft Container and method for producing a container for liquid operating media in a motor vehicle

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3650312T2 (en) * 1985-06-29 1996-01-11 Erik Bock Process for manufacturing containers.
JPH0790609B2 (en) * 1985-12-04 1995-10-04 株式会社タカギセイコー Hose molding method for radiator liquid
DE3940497A1 (en) * 1989-12-07 1991-06-13 Schenk Helga Prodn. of thin-walled bottles - by forming tubing of single or laminated thermoplastic film with suitable dia. neck and welding that to similar dia. neck piece
DE3942308A1 (en) * 1989-12-21 1991-06-27 Bosch Gmbh Robert Thermoplastic engine intake pipes etc. - produced by injection moulding e.g. straight pipes for easy demoulding and then hot forming them into bends required
DE3942398A1 (en) * 1989-12-21 1991-06-27 Minnesota Mining & Mfg SCREEN PRINTABLE ACRYLATE ADHESIVE MATERIAL, METHOD FOR THEIR PREPARATION AND SCREEN PRESSURE PRODUCED WITH THIS ADHESIVE MATERIAL
CA2043519C (en) * 1990-05-31 1998-11-24 Takao Umezawa Motor casing made of resin and method of manufacturing the same
DE4239909C1 (en) * 1992-11-27 1994-05-05 Rasmussen Gmbh Tubular plastic connector for flexible lines - comprises fibre reinforced first part with low creep, injected onto unreinforced second part
DE4306973A1 (en) * 1993-03-05 1994-09-08 Kautex Werke Gmbh Process for producing hollow bodies from thermoplastic
FR2746339B1 (en) * 1996-03-22 1998-06-05 Plastic Omnium Cie METHOD FOR MANUFACTURING A BEAM OF ATTACHED TUBES, DEVICE FOR CARRYING OUT SUCH A METHOD AND BEAM THUS PRODUCED
DE19648323C1 (en) * 1996-11-22 1997-11-20 Utz Georg Holding Ag Container for packaging products for containing, e.g.electronic components, etc.
DE19825104A1 (en) * 1997-07-09 1999-01-14 Mannesmann Vdo Ag Plastic container and process for its manufacture

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0043186A1 *

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WO2000043186A1 (en) 2000-07-27
KR20010092253A (en) 2001-10-24
DE19902430A1 (en) 2000-08-10
CN1106256C (en) 2003-04-23
JP2002535161A (en) 2002-10-22
CN1293610A (en) 2001-05-02
DE19902430C2 (en) 2001-09-06

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