WO1995018713A1 - Process and device for producing a hollow body with external attachments - Google Patents
Process and device for producing a hollow body with external attachments Download PDFInfo
- Publication number
- WO1995018713A1 WO1995018713A1 PCT/EP1995/000027 EP9500027W WO9518713A1 WO 1995018713 A1 WO1995018713 A1 WO 1995018713A1 EP 9500027 W EP9500027 W EP 9500027W WO 9518713 A1 WO9518713 A1 WO 9518713A1
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- WIPO (PCT)
- Prior art keywords
- intermediate product
- lance
- mold
- hollow body
- producing
- Prior art date
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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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
- B29C49/482—Moulds with means for moulding parts of the parisons in an auxiliary cavity, e.g. moulding a handle
-
- 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
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/4242—Means for deforming the parison prior to the blowing operation
Definitions
- the invention relates to a method and a device for producing a hollow body made of thermoplastic material provided with external attachments, for example a tab, by inflating an intermediate product enclosed in a mold cavity.
- the invention has for its object to provide a method and an apparatus of the type mentioned, with which the manufacture of hollow bodies provided with outer approaches can be achieved more easily and better.
- This object is achieved for a method according to the invention in that the intermediate product is gripped by a drawing agent on a limited surface section of its outside and the material required to form the batch is drawn into an intermediate space outside the mold cavity without being turned inside out.
- a drawing agent for example a pliers-like gripping head, a vacuum suction head, etc.
- a pulling means for example a pliers-like gripping head, a vacuum suction head, etc.
- the wall of the intermediate product is gently grasped on the surface section delimited by the tip of the drawing means - which is especially true when vacuum extraction - and can be drawn or sucked into the mold space without having to be turned inside out. Since an inversion is not necessary when pulling out the attachment material, it is possible to work with very short closing paths of the tools, in particular sliders, which limit the mold space for the attachment, which results in an uncritical stretching ratio. The larger the closing paths are, the greater are the problems that arise due to the necessary flow processes in the transition area between the attachment and the hollow body.
- One embodiment of the invention provides that the intermediate product is blown out while the lug material is being pulled out, so that the blowing pressure which is present can consequently be used to support the suction or pulling-in of lug material into the molding space.
- the drawing agent is advantageously heated or tempered, it is possible to counteract premature solidification of the extracted material and to maintain better flowability.
- a device for performing the method provides that a drawing means with a gripping head is used.
- a drawing means which is designed in the form of a linearly movable lance with a suction head which is connected to a vacuum source via a line leading to the tip of the lance is.
- the reciprocating lance is thus selective, namely in the area of the lance tip for contact with the
- the mold halves forming the mold cavity have a lariza's passage opening which is delimited by two slides, which move towards and away from one another and enclose the attachment mold space.
- the slides need only a little to suck the material, and only to be opened so far that the lance, which is designed as a narrow rectangular body, can dip into the mold cavity.
- the closing path of the slide is correspondingly short, in order to deform or press the plastic material drawn into the mold space in a loop-like manner when the lance is returned to the desired approach; the result is a very favorable material distribution which avoids thin spots.
- Figure 1 is a partial section in plan view of a tool arrangement for producing blow molded articles with - based on a tube-shaped intermediate product shown in dash-dotted lines - molded on by vacuum suction;
- Figure 2 seen the front view of the tool arrangement in the direction of arrow "X" of Figure 1.
- the tool arrangement of a blow molding machine, not shown, for producing hollow bodies made of thermoplastic plastic provided with an outer shoulder has in essentially two mold halves 3a, 3b enclosing a mold cavity 1 for the hollow body 2, into which a blow mandrel (not shown) projects.
- lug 4 an attachment - hereinafter referred to as lug 4 - to the hollow body 2 during blowing out or thereafter
- the tool halves 3a, 3b which can be set against one another are excluded in an area desired for the lug 4, the mutually opposite recesses being a passage opening 5 form (see FIG. 1).
- This is delimited by two sliders 7a, 7b which can move towards and away from one another and enclose a molding space 6 for the tab 4, which at the same time make it possible to change the opening dimension of the passage opening.
- the tool halves 3a, 3b or slides 7a, 7b are assigned a lance 9 which is linearly reciprocable at right angles to their actuating movements and is connected to an actuator 8.
- This has a plate-like, narrow, rectangular sword 10 which, after the slides 7a, 7b have been moved apart, dips through the mold space 6 into the mold cavity 1 and, with its lance tip 11, bears against a tubular intermediate product 12 previously introduced there; this position is shown in dot-dash lines in FIG.
- the lance 9 or the sword 10 is provided with lines 13, which are connected on the one hand to a vacuum source 14 schematically indicated in FIG. 2 and on the other hand open into a suction head 15 of the lance tip 11.
- pliers-like gripping means can be provided on the lance tip 11 and the attachment material can be gripped by means of the pliers instead of applying a vacuum and pulled into the mold space 6 when the lance is moved back.
- a vacuum is preferably applied to the suction head 15 while the intermediate product 12 is being blown out, so that the hose-like intermediate product 12 is fixed to the lance tip 11.
- the lance 9 is then moved out of the mold cavity 1, along with the shaping of the hollow body 2, with her sword 10 pulling the material required for the tab 4 into the mold space 6 of the slider 7a, 7b.
- the vacuum is released and the lance 9 together with the sword 10 are moved out of the effective range of the slides 7a, 7b into the inoperative position shown in solid lines in FIG.
- only the slides 7a, 7b need to be moved together to compress the material to the tab 4 in the position shown in FIG. 1 in order to complete the hollow body 2 provided with a molded tab 4 (see FIG. 2).
- the material required for the tab 4 does not wrap around the sword 10 of the lance 9, but rather is fixed at the tip 11 of the lance by means of the vacuum applied to the suction head 15, the material is drawn or sucked into the molding space 6 without it it it requires an inversion. If the lance 9 or its sword 10 is tempered by suitable heating means, not shown, the flow behavior of the thermoplastic material can be improved when it is drawn into the mold space 6 and pressed to the tab 4.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
In a process for producing a thermoplastic hollow body (2) fitted with external attachments, e.g. a bracket, by blow-moulding an intermediate product (12) included in a mould cavity (1), the intermediate product (12) is gripped by a pulling device over a limited area of its outer surface and the material needed to make the attachment is drawn without being turned up into a moulding chamber (6) outside the mould cavity (1). A pulling device used for this purpose is fitted with a gripping head.
Description
"Verfahren und Vorrichtung zum Herstellen eines mit äußeren Ansätzen versehenen Hohlkörpers""Method and device for producing a hollow body provided with external approaches"
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Herstellen eines mit äußeren Ansätzen, beispielsweise eine Lasche, versehenen Hohlkörpers aus thermoplastischem Kunststoff durch Aufblasen eines in einem Formnest eingeschlossenen Zwischenerzeugnisses.The invention relates to a method and a device for producing a hollow body made of thermoplastic material provided with external attachments, for example a tab, by inflating an intermediate product enclosed in a mold cavity.
Um Hohlkörper aus thermoplastischem Kunststoff mit einem außen angeordneten Ansatz (Lasche, Flansch, etc.) herzustellen, ist es bekannt, vor dem Aufweiten des in der Regel schlauchförmigen Zwischenerzeugnisses in das Formnest einer mehrteiligen Form ein den späteren Ansatz definierendes Einlege-Bauteil einzubringen. Beim Aufweiten des Zwischenerzeugnisses wird das Einlege-Bauteil von thermoplastischem Material umschlossen und in der Wandung des Hohlkörpers fixiert. Weiterhin zählt es zum Stand der Technik (vgl. z.B. EP 0 550 776 AI), einen Hohlkörper durch ein in einem zweiten Schritt vorzunehmendes Anspritzgießen mit radialen Ansätzen zu versehen. Sowohl das Anspritzgießen als auch das oben beschriebene Verfahren mit Einlege-Bauteilen setzt einen zusätzlichen, hohen Aufwand voraus.In order to produce hollow bodies made of thermoplastic material with an externally arranged attachment (tab, flange, etc.), it is known to insert an insert component which defines the later attachment into the mold cavity of a multi-part mold before the generally tubular intermediate product is expanded. When the intermediate product is expanded, the insert component is surrounded by thermoplastic material and fixed in the wall of the hollow body. Furthermore, it is part of the prior art (cf. e.g. EP 0 550 776 AI) to provide a hollow body with radial projections by means of an injection molding to be carried out in a second step. Both injection molding and the process described above with insert components require additional, high expenditure.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung der eingangs genannten Art zu schaffen, mit denen sich das Herstellen von mit äußeren Ansätzen versehenen Hohlkörpern einfacher und besser erreichen läßt.The invention has for its object to provide a method and an apparatus of the type mentioned, with which the manufacture of hollow bodies provided with outer approaches can be achieved more easily and better.
Diese Aufgabe wird für ein Verfahren erfindungsgemäß dadurch gelöst, daß das Zwischenerzeugnis auf einem begrenzten Flächen¬ abschnitt seiner Außenseite von einem Ziehmittel ergriffen und das zur Ausbildung des Ansatzes benötigte Material ohne Umstülpung in einen Zwischenraum außerhalb des Formnestes hineingezogen wird. Das partielle Ergreifen der Außenwandung bzw. partielle Befestigen eines Ziehmittels, z.B. ein zangenartiger Greifkopf, ein Vakuum-Saugkopf, etc., an der Außenwandung des Zwischenerzeugnisses ermöglicht - wie
Versuche bestätigt haben - insbesondere dann, wenn nach einem bevorzugten Vorschlag der Erfindung ein den Ansatz herausziehendes Vakuum eingesetzt wird, mehrere Vorteile gleichzeitig: Das Zwischenerzeugnis bzw. der Schlauch läßt sich definiert an der Spitze des Ziehmittels fixieren, und es läßt sich eine deutlich größere Materialmenge in den Formraum für den Ansatz hineinziehen. Die Wandung des Zwischenerzeugnisses wird auf dem von der Spitze des Ziehmittels begrenzten Flächenabschnitt schonend - was vor allem beim Vakuum-Herausziehen gilt - ergriffen und läßt sich in den Formraum hineinziehen bzw. -saugen, ohne dazu umgestülpt werden zu müssen. Da ein Umstülpen beim Herausziehen des Ansatzmaterials nicht erforderlich ist, kann mit sehr geringen Schließwegen der den Formraum für den Ansatz begrenzenden Werkzeuge, insbesondere Schieber, gearbeitet werden, was ein unkritisches Reckverhältnis mit sich bringt. Je größer nämlich die Schließwege sind, umso größer sind die Probleme, die die aufgrund der notwendigen Fließvorgänge im Übergangsbereich zwischen dem Ansatz und dem Hohlkörper auftretenden Dünnstellen bereiten.This object is achieved for a method according to the invention in that the intermediate product is gripped by a drawing agent on a limited surface section of its outside and the material required to form the batch is drawn into an intermediate space outside the mold cavity without being turned inside out. The partial gripping of the outer wall or partial fastening of a pulling means, for example a pliers-like gripping head, a vacuum suction head, etc., makes it possible - such as Experiments have confirmed - especially if, according to a preferred proposal of the invention, a vacuum pulling out the approach is used, several advantages at the same time: the intermediate product or the hose can be fixed in a defined manner at the tip of the drawing means, and a significantly larger amount of material can be used pull into the molding space for the approach. The wall of the intermediate product is gently grasped on the surface section delimited by the tip of the drawing means - which is especially true when vacuum extraction - and can be drawn or sucked into the mold space without having to be turned inside out. Since an inversion is not necessary when pulling out the attachment material, it is possible to work with very short closing paths of the tools, in particular sliders, which limit the mold space for the attachment, which results in an uncritical stretching ratio. The larger the closing paths are, the greater are the problems that arise due to the necessary flow processes in the transition area between the attachment and the hollow body.
Eine Ausgestaltung der Erfindung sieht vor, daß das Zwischenerzeugnis während des Herausziehens des Ansatzmaterials ausgeblasen wird, so daß folglich der anstehende Blasdruck zur Unterstützung des Ansaugens bzw. Einziehens von Ansatz-Material in den Formraum ausgenutzt werden kann.One embodiment of the invention provides that the intermediate product is blown out while the lug material is being pulled out, so that the blowing pressure which is present can consequently be used to support the suction or pulling-in of lug material into the molding space.
Wenn das Ziehmittel vorteilhaft beheizt bzw. temperiert wird, läßt sich einer frühzeitigen Erstarrung des herausgezogenen Materials entgegenwirken und eine bessere Fließfähigkeit aufrechterhalten.If the drawing agent is advantageously heated or tempered, it is possible to counteract premature solidification of the extracted material and to maintain better flowability.
Eine Vorrichtung zum Durchführen des Verfahrens sieht vor, daß ein Ziehmittel mit einem Greifkopf zum Einsatz kommt. Hierfür bietet sich nach einer bevorzugten Ausführung der Erfindung ein Ziehmittel an, das in Form einer linearbeweglichen Lanze mit einem Saugkopf ausgebildet ist, der über eine bis zur Lanzenspitze führenden Leitung mit einer Vakuumquelle verbunden
ist. Die hin- und herbewegliche Lanze wird somit punktuell, nämlich im Bereich der Lanzenspitze zur Anlage an dasA device for performing the method provides that a drawing means with a gripping head is used. For this purpose, according to a preferred embodiment of the invention, there is a drawing means which is designed in the form of a linearly movable lance with a suction head which is connected to a vacuum source via a line leading to the tip of the lance is. The reciprocating lance is thus selective, namely in the area of the lance tip for contact with the
Zwischenerzeugnis gebracht, und nachdem das Vakuum ansteht, kann die auf Rückhub umgeschaltete Lanze das angesaugte Ansatz-Material in den Formraum hineinziehen.Intermediate product brought, and after the vacuum is applied, the lance switched to return stroke can pull the sucked approach material into the mold space.
Nach einem Vorschlag der Erfindung weisen die das Formnest bildenden Werkzeughälf en eine Larizen-Durchtrittsöffnung auf, die von zwei den Ansatz-Formraum einschließenden, aufeinanderzu- und voneinanderwegbeweglichen Schiebern begrenzt ist. Die Schieber brauchen zum Ansaugen des Materials nur geringfügig, und zwar lediglich soweit geöffnet zu werden, daß die als schmaler Rechteckkörper ausgebildete Lanze in das Formnest eintauchen kann. Entsprechend gering ist der Schließweg der Schieber, um das beim Rückhub der Lanze schlaufenartig durch die Durchtrittsöffnung in den Formraum hineingezogene Kunststoffmaterial zu dem gewünschten Ansatz zu verformen bzw. pressen; es ergibt sich eine sehr günstige, Dünnstellen vermeidende Materialverteilung.According to a proposal of the invention, the mold halves forming the mold cavity have a lariza's passage opening which is delimited by two slides, which move towards and away from one another and enclose the attachment mold space. The slides need only a little to suck the material, and only to be opened so far that the lance, which is designed as a narrow rectangular body, can dip into the mold cavity. The closing path of the slide is correspondingly short, in order to deform or press the plastic material drawn into the mold space in a loop-like manner when the lance is returned to the desired approach; the result is a very favorable material distribution which avoids thin spots.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus den Ansprüchen und der nachfolgenden Beschreibung, in der ein in den Zeichnungen schematisch dargestelltes Ausführungsbeispiel des Gegenstandes der Erfindung näher erläutert ist. Es zeigen:Further features and advantages of the invention result from the claims and the following description, in which an exemplary embodiment of the subject matter of the invention schematically illustrated in the drawings is explained in more detail. Show it:
Figur 1 als Teilschnitt in der Draufsicht eine Werkzeuganordnung zum Herstellen von Blasformkörpern mit - ausgehend von einem strichpunktiert dargestellten, schlauchförmigen Zwischenerzeugnis- durch Vakuum-Ansaugung angeformten Ansatz; undFigure 1 is a partial section in plan view of a tool arrangement for producing blow molded articles with - based on a tube-shaped intermediate product shown in dash-dotted lines - molded on by vacuum suction; and
Figur 2 die Vorderansicht der Werkzeuganordnung in Pfeilrichtung "X" von Figur 1 gesehen.Figure 2 seen the front view of the tool arrangement in the direction of arrow "X" of Figure 1.
Die Werkzeuganordnung einer nicht dargestellten Blasformmaschine zum Herstellen von mit einem äußeren Ansatz versehenen Hohlkörpern aus thermoplastischem Kunststoff weist im
wesentlichen zwei ein Formnest 1 für den Hohlkörper 2 einschließende Werkzeughälften 3a, 3b auf, in das ein nicht gezeigter Blasdorn hineinragt. Um während des Ausblasens bzw. im Anschluß daran an den Hohlkörper 2 einen Ansatz - nachfolgend Lasche 4 genannt - anformen zu können, sind die gegeneinander anstellbaren Werkzeughälften 3a,3b in einem für die Lasche 4 gewünschten Bereich ausgenommen, wobei die einander gegenüberliegenden Ausnehmungen eine Durchtrittsöffnung 5 bilden (vgl. Figur 1). Diese wird von zwei aufeinanderzu- und voneinanderwegbeweglichen, einen Formraum 6 für die Lasche 4 einschließenden Schiebern 7a, 7b begrenzt, die es zugleich erlauben, das Öffnungsmaß der Durchtrittsöffnung zu verändern.The tool arrangement of a blow molding machine, not shown, for producing hollow bodies made of thermoplastic plastic provided with an outer shoulder has in essentially two mold halves 3a, 3b enclosing a mold cavity 1 for the hollow body 2, into which a blow mandrel (not shown) projects. In order to be able to form an attachment - hereinafter referred to as lug 4 - to the hollow body 2 during blowing out or thereafter, the tool halves 3a, 3b which can be set against one another are excluded in an area desired for the lug 4, the mutually opposite recesses being a passage opening 5 form (see FIG. 1). This is delimited by two sliders 7a, 7b which can move towards and away from one another and enclose a molding space 6 for the tab 4, which at the same time make it possible to change the opening dimension of the passage opening.
Den Werkzeughälften 3a, 3b bzw. Schiebern 7a, 7b ist eine rechtwinklig zu deren Stellbewegungen linear hin- und herbewegliche, mit einem Stellglied 8 verbundene Lanze 9 zugeordnet. Diese besitzt ein plattenartiges, schmales, rechteckiges Schwert 10, das nach dem Auseinanderfahren der Schieber 7a, 7b durch den Formraum 6 hindurch bis in das Formnest 1 eintaucht und sich mit seiner Lanzenspitze 11 an ein zuvor dort eingebrachtes, schlauchförmiges Zwischenerzeugnis 12 anlegt; diese Position ist in Figur 1 strichpunktiert dargestellt. Die Lanze 9 bzw. das Schwert 10 ist mit Leitungen 13 versehen, die einerseits mit einer in Figur 2 schematisch angedeuteten Vakuumquelle 14 verbunden sind und andererseits in einen Saugkopf 15 der Lanzenspitze 11 münden. An der Lanzenspitze 11 ließen sich alternativ beispielsweise zangenartige Greifmittel vorsehen und das Ansatzmaterial folglich statt durch Anlegen eines Vakuums mittels der Zangen ergreifen und beim Zurückbewegen der Lanze in den Formraum 6 hineinziehen.The tool halves 3a, 3b or slides 7a, 7b are assigned a lance 9 which is linearly reciprocable at right angles to their actuating movements and is connected to an actuator 8. This has a plate-like, narrow, rectangular sword 10 which, after the slides 7a, 7b have been moved apart, dips through the mold space 6 into the mold cavity 1 and, with its lance tip 11, bears against a tubular intermediate product 12 previously introduced there; this position is shown in dot-dash lines in FIG. The lance 9 or the sword 10 is provided with lines 13, which are connected on the one hand to a vacuum source 14 schematically indicated in FIG. 2 and on the other hand open into a suction head 15 of the lance tip 11. Alternatively, for example, pliers-like gripping means can be provided on the lance tip 11 and the attachment material can be gripped by means of the pliers instead of applying a vacuum and pulled into the mold space 6 when the lance is moved back.
Zum Anformen der Lasche 4 an den Hohlkörper 2 wird vorzugsweiseschon während des Ausblasens des Zwischenerzeugnisses 12 - an den Saugkopf 15 ein Vakuum angelegt, so daß das schlauchartige Zwischenerzeugnis 12 an der Lanzenspitze 11 fixiert wird. Die Lanze 9 wird dann - einhergehend mit dem Ausformen des Hohlkörpers 2 - aus dem Formnest 1 herausbewegt,
wobei sie mit ihrem Schwert 10 das für die Lasche 4 benötigte Material in den Formraum 6 der Schieber 7a, 7b hineinzieht. Sobald sich das Material in dem Formraum 6 befindet, wird das Vakuum aufgehoben und die Lanze 9 samt Schwert 10 aus dem Wirkbereich der Schieber 7a, 7b in die in Figur 1 mit durchgezogenen Linien dargestellte Außerbetriebsposition bewegt. Es brauchen danach lediglich noch die Schieber 7a, 7b zum Verpressen des Materials zu der Lasche 4 in die in Figur 1 gezeigte Stellung zusammengefahren zu werden, um den mit einer angeformten Lasche 4 versehenen Hohlkörper 2 (vgl. Figur 2) fertigzustellen.To form the tab 4 on the hollow body 2, a vacuum is preferably applied to the suction head 15 while the intermediate product 12 is being blown out, so that the hose-like intermediate product 12 is fixed to the lance tip 11. The lance 9 is then moved out of the mold cavity 1, along with the shaping of the hollow body 2, with her sword 10 pulling the material required for the tab 4 into the mold space 6 of the slider 7a, 7b. As soon as the material is in the molding space 6, the vacuum is released and the lance 9 together with the sword 10 are moved out of the effective range of the slides 7a, 7b into the inoperative position shown in solid lines in FIG. Thereafter, only the slides 7a, 7b need to be moved together to compress the material to the tab 4 in the position shown in FIG. 1 in order to complete the hollow body 2 provided with a molded tab 4 (see FIG. 2).
Da sich das für die Lasche 4 benötigte Material nicht um das Schwert 10 der Lanze 9 legt, vielmehr mittels des an den Saugkopf 15 angelegten Vakuums an der Lanzenspitze 11 fixiert wird, wird das Material in den Formraum 6 hineingezogen bzw. -gesaugt, ohne daß es dazu einer Umstülpung bedarf. Wenn die Lanze 9 bzw. ihr Schwert 10 durch geeignete, nicht gezeigte Heizmittel temperiert wird, läßt sich das Fließverhalten des thermoplastischen Kunststoffs beim Hineinziehen in den Formraum 6 und Verpressen zu der Lasche 4 verbessern.
Since the material required for the tab 4 does not wrap around the sword 10 of the lance 9, but rather is fixed at the tip 11 of the lance by means of the vacuum applied to the suction head 15, the material is drawn or sucked into the molding space 6 without it it requires an inversion. If the lance 9 or its sword 10 is tempered by suitable heating means, not shown, the flow behavior of the thermoplastic material can be improved when it is drawn into the mold space 6 and pressed to the tab 4.
Claims
1. Verfahren zum Herstellen eines mit äußeren Ansätzen, beispielsweise eine Lasche, versehenen Hohlkörpers aus thermoplastischem Kunststoff durch Aufblasen eines in einem Formnest eingeschlossenen Zwischenerzeugnisses, wobei das Zwischenerzeugnis auf einem begrenzten Flächenabschnitt seiner Außenseite von einem Ziehmittel ergriffen und das zur Ausbildung des Ansatzes benötigte Material ohne Umstülpung in einen Formraum außerhalb des Formnestes hineingezogen wird. d a d u r c h g e k e n n z e i c h n e t, daß an das Zwischenerzeugnis ein den Ansatz herausziehendes1. A process for producing a hollow body made of thermoplastic plastic provided with external approaches, for example a tab, by inflating an intermediate product enclosed in a mold cavity, the intermediate product being gripped by a drawing agent on a limited area portion of its outside and without the material required for forming the approach Inverted into a mold space outside the mold nest is drawn. d a d u r c h g e k e n n z e i c h n e t that the approach to the intermediate product
Vakuum angelegt wird.Vacuum is applied.
2. Verfahren nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, daß das Zwischenerzeugnis während des Herausziehens des Ansatzmaterials ausgeblasen wird.2. The method of claim 1, d a d u r c h g e k e n n z e i c h n e t that the intermediate product is blown out while pulling out the batch material.
3. Verfahren nach Anspruch 1 oder 2, d a d u r c h g e k e n n z e i c h n e t, daß das Ziehmittel beheizt wird.3. The method of claim 1 or 2, d a d u r c h g e k e n n z e i c h n e t that the drawing agent is heated.
4. Vorrichtung zum Durchführen des Verfahrens nach Anspruch4. Device for performing the method according to claim
1, d a d u r c h g e k e n n z e i c h n e t, daß ein Ziehmittel (9, 10) mit einem Greifkopf (15) eingesetzt ist.1, so that a pulling means (9, 10) with a gripping head (15) is inserted.
5. Vorrichtung nach Anspruch 4, d a d u r c h g e k e n n z e i c h n e t, daß das Ziehmittel in Form einer linearbeweglichen Lanze (9, 10) mit einem Saugkopf ausgebildet ist, der über eine bis zur Lanzenspitze (11) führenden Leitung (13) mit einer Vakuumquelle (14) verbunden ist.5. The device according to claim 4, characterized in that the drawing means in the form of a linearly movable lance (9, 10) is formed with a suction head which is connected via a line leading to the lance tip (11) (13) with a vacuum source (14) .
6. Vorrichtung nach Anspruch 4 oder 5, d a d u r c h g e k e n n z e i c h n e t , daß die das Formnest (1) bildenden Werkzeughälften (3a, 3b) eine Lanzen-Durchtrittsöffnung (5) aufweisen, die von zwei den Ansatz-Formraum (6) einschließenden, aufeinanderzu- und voneinanderwegbeweglichlichen Schiebern (7a, 7b) begrenzt ist . 6. The device according to claim 4 or 5, characterized in that the mold halves (3a, 3b) forming the mold cavity (1) have a lance passage opening (5) which is delimited by two slides (7a, 7b) which move towards and away from one another and which enclose the attachment molding space (6).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4400398.6 | 1994-01-08 | ||
| DE19944400398 DE4400398C2 (en) | 1994-01-08 | 1994-01-08 | Method and device for producing a hollow body provided with external approaches |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1995018713A1 true WO1995018713A1 (en) | 1995-07-13 |
| WO1995018713B1 WO1995018713B1 (en) | 1995-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1995/000027 WO1995018713A1 (en) | 1994-01-08 | 1995-01-05 | Process and device for producing a hollow body with external attachments |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE4400398C2 (en) |
| WO (1) | WO1995018713A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019134041A1 (en) * | 2018-01-05 | 2019-07-11 | Abc Group Inc. | Methods and molding apparatus for forming a flashless article with tabs |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19609963A1 (en) * | 1996-03-14 | 1997-09-18 | Kautex Maschinenbau Gmbh | Blow moulding of hollow plastics products with an external projection |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1454978A1 (en) * | 1964-12-23 | 1969-07-17 | Battenfeld Maschinenfabrik Geb | Process for the production of hollow bodies from thermoplastic material in the blow molding process and device for its implementation |
| FR2346137A1 (en) * | 1976-03-31 | 1977-10-28 | Elbatainer Kunststoff | METHOD AND DEVICE FOR MANUFACTURING CONTAINERS IN THERMOPLASTIC MATERIAL |
| JPS5695649A (en) * | 1979-12-28 | 1981-08-03 | Nippon Denso Co Ltd | Method and apparatus for producing resin hollow body with solid projection |
| JPS59232827A (en) * | 1983-06-15 | 1984-12-27 | Matsushita Electric Works Ltd | Blow molding device |
| JPS60149428A (en) * | 1984-01-13 | 1985-08-06 | Matsushita Electric Works Ltd | Mold for blow molding |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0550776B1 (en) * | 1992-01-10 | 1997-04-09 | Excell Corporation | Method for producing a hollow plastic product having a radially extending portion |
-
1994
- 1994-01-08 DE DE19944400398 patent/DE4400398C2/en not_active Expired - Fee Related
-
1995
- 1995-01-05 WO PCT/EP1995/000027 patent/WO1995018713A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1454978A1 (en) * | 1964-12-23 | 1969-07-17 | Battenfeld Maschinenfabrik Geb | Process for the production of hollow bodies from thermoplastic material in the blow molding process and device for its implementation |
| FR2346137A1 (en) * | 1976-03-31 | 1977-10-28 | Elbatainer Kunststoff | METHOD AND DEVICE FOR MANUFACTURING CONTAINERS IN THERMOPLASTIC MATERIAL |
| JPS5695649A (en) * | 1979-12-28 | 1981-08-03 | Nippon Denso Co Ltd | Method and apparatus for producing resin hollow body with solid projection |
| JPS59232827A (en) * | 1983-06-15 | 1984-12-27 | Matsushita Electric Works Ltd | Blow molding device |
| JPS60149428A (en) * | 1984-01-13 | 1985-08-06 | Matsushita Electric Works Ltd | Mold for blow molding |
Non-Patent Citations (3)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 5, no. 170 (M - 94)<842> 29 October 1981 (1981-10-29) * |
| PATENT ABSTRACTS OF JAPAN vol. 9, no. 111 (M - 379)<1834> 15 May 1985 (1985-05-15) * |
| PATENT ABSTRACTS OF JAPAN vol. 9, no. 313 (M - 437)<2036> 10 December 1985 (1985-12-10) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019134041A1 (en) * | 2018-01-05 | 2019-07-11 | Abc Group Inc. | Methods and molding apparatus for forming a flashless article with tabs |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4400398C2 (en) | 1997-12-18 |
| DE4400398A1 (en) | 1995-07-13 |
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