DE3507523C1 - Foam supporting mould - Google Patents

Foam supporting mould

Info

Publication number
DE3507523C1
DE3507523C1 DE19853507523 DE3507523A DE3507523C1 DE 3507523 C1 DE3507523 C1 DE 3507523C1 DE 19853507523 DE19853507523 DE 19853507523 DE 3507523 A DE3507523 A DE 3507523A DE 3507523 C1 DE3507523 C1 DE 3507523C1
Authority
DE
Germany
Prior art keywords
mould
injection channel
foam
supporting mould
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE19853507523
Other languages
German (de)
Inventor
Des Erfinders Auf Nennung Verzicht
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.)
Deutsche Fibrit Gesellschaft Ebers and Dr Mueller mbH
Original Assignee
Deutsche Fibrit Gesellschaft Ebers and Dr Mueller mbH
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 Deutsche Fibrit Gesellschaft Ebers and Dr Mueller mbH filed Critical Deutsche Fibrit Gesellschaft Ebers and Dr Mueller mbH
Priority to DE19853507523 priority Critical patent/DE3507523C1/en
Application granted granted Critical
Publication of DE3507523C1 publication Critical patent/DE3507523C1/en
Expired 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/58—Moulds
    • B29C44/581—Closure devices for pour holes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3005—Body finishings

Abstract

The invention relates to a foam supporting mould for the production of motor vehicle interior lining parts such as dashboards, consisting of a film covering, back-foaming and foamed-on and/or foamed-in carrier parts. The supporting mould comprises an upper and a lower supporting mould half. When folded together, the mould halves enclose the mould cavity. In one supporting mould half there is provided at least one injection channel which opens out into the mould cavity. The characterising feature of the invention is that a valve tappet is inserted in the other supporting mould half opposite the aperture of the injection channel, can be moved towards the opening and back and presses the film covering in a sealing manner against the opening.

Description

Patentansprüche: 1. Schäum-Stützform für die Herstellung von Kraftfahrzeug-lnnenverkleidungsteilen, wie Armaturentafeln, bestehend aus einem Folienbezug, Hinterschäumung und an- und/oder eingeschäumten Trägerteilen, wobei die Stützform eine obere und eine untere Stützformhälfte umfaßt, die im zusammengeklappten Zustand den Formhohlraum einschließen und wobei in der einen Stützformhälfte mindestens ein Einspritzkanal vorgesehen ist, der in den Formhohlraum mündet, d a d u r c h g e k e n n -z e i c h n e t, daß in der anderen Stützformhälfte (1) gegenüber der Öffnung (3) des Einspritzkanals (4) ein zur Öffnung (3) hin und zurück bewegbarer, den Folienbezug (7) dichtend gegen die Öffnung (3) pressender Ventilstößel (2) eingesetzt ist. Claims: 1. Foam support mold for the production of motor vehicle interior trim parts, such as dashboards, consisting of a film cover, foam backing and on and / or foamed-in support parts, the support mold having an upper and a lower support mold half includes, which in the collapsed state enclose the mold cavity and wherein in the one support mold half at least one injection channel is provided, which in the mold cavity opens out, d u r c h e k e n n -z e i c h n e t that in the other support mold half (1) opposite the opening (3) of the injection channel (4) to the opening (3) movable back and forth, the film cover (7) sealing against the Opening (3) pressing valve tappet (2) is inserted.

2. Schäum-Stützform nach Anspruch 1, dadurch gekennzeichnet, daß der Ventilstößel (2) gegen die Kraft einer Rückstellfeder (6) in die Schließstellung bewegbar ist. 2. foaming support mold according to claim 1, characterized in that the valve tappet (2) into the closed position against the force of a return spring (6) is movable.

3. Schäum-Stützform nach Anspruch 1, dadurch gekennzeichnet, daß der Ventilstößel (2) durch eine doppelt wirkende Zylinder-Kolbeneinheit gesteuert ist. 3. foaming support mold according to claim 1, characterized in that the valve tappet (2) is controlled by a double-acting cylinder-piston unit is.

Die Erfindung betrifft eine Schäum-Stützform für die Herstellung von Kraftfahrzeug-lnnenverkleidungsteilen, wie Armaturentafeln, bestehend aus einem Folienbezug, einer Hinterschäumung sowie an- und/oder eingeschäumten Trägerteilen nach dem Oberbegriff des Patentanspruchs 1. Die Stützform besitzt eine ein- oder mehrteilige obere und eine ein- oder mehrteilige unter Stützformhälfte, die im zusammengeklappten Zustand den Formhohlraum einschließen. In der einen Stützformhälfte ist mindestens ein Einspritzkanal vorgesehen, der in den Formhohlraum mündet und durch den Schaumstoff in den Formhohlraum zur Hinterschäumung des Folienbezugs eingespritzt wird. The invention relates to a foam support mold for manufacture of interior trim parts for motor vehicles, such as dashboards, consisting of a Foil cover, a back-foaming as well as foamed-on and / or foamed-in support parts according to the preamble of claim 1. The support form has a one or multi-part upper and a one-part or multi-part lower support mold half, which is in the collapsed State include the mold cavity. In one support mold half is at least an injection channel is provided which opens into the mold cavity and through the foam is injected into the mold cavity for back-foaming of the film cover.

Beim Einspritzen von Schaumstoffsystemen in den Formhohlraum von Schäum-Stützformen wird eine zur Füllung des jeweiligen Formhohlraumvolumens notwendige Menge Schaumstoff aus einer Spritzdüse durch den Einspritzkanal in den Formhohlraum eingespritzt Während des Schäumprozesses schäumt das in den Formhohlraum eingespritzte Material und das im Einspritzkanal verbliebene Restmaterial unter erheblicher Volumenzunahme auf - die Volumenzunahme beträgt ein Vielfaches der eingespritzten Volumenmenge -, und strömt durch den offenen Einspritzkanal zurück. When injecting foam systems into the mold cavity of Foam support molds are necessary to fill the respective mold cavity volume Amount of foam from a spray nozzle through the injection channel into the mold cavity injected During the foaming process, what is injected into the mold cavity foams Material and the residual material remaining in the injection channel with a considerable increase in volume on - the increase in volume is a multiple of the injected volume -, and flows back through the open injection port.

Die Folge sind Lunker bzw. Hohlräume in der Hinterschäumung. Zur Entfernung des aus dem Einspritzkanal austretenden und in ihm verbliebenen Schaumstoffs ist ein erheblicher Arbeitsaufwand erforderlich.The result is voids or cavities in the foam backing. To the distance of the foam emerging from the injection channel and remaining in it a considerable amount of work is required.

Aufgabe der Erfindung ist nun die Schaffung vdn Mitteln, die verhindern, daß im Formhohlraum Lunker entstehen und die den Aufwand für die Säuberung des Einspritzkanals verringern. The object of the invention is now to create means that prevent that voids arise in the mold cavity and that the effort for cleaning the injection channel to decrease.

Zur Lösung dieser Aufgabe wird bei einer Schäum-Stützform der eingangs genannten Gattung erfindungsgemäß vorgeschlagen, daß in der anderen Stützformhälfte gegenüber der Öffnung des Einspritzkanals ein zur Öffnung hin und zurück bewegbarer, den Folienbezug dichtend gegen die Öffnung pressender Ventilstößel eingesetzt ist. Bevorzugt soll der Ventilstößel gegen die Kraft einer Rückstellfeder oder durch eine doppelt wirkende Zylinder-Kolbeneinheit in die Schließstellung bewegbar sein. To solve this problem, in the case of a foam support mold, the initially introduced mentioned genus proposed according to the invention that in the other support mold half opposite the opening of the injection channel a movable back and forth towards the opening, the film cover is inserted sealingly against the opening pressing valve tappets. The valve tappet should preferably counteract the force of a return spring or through a double-acting cylinder-piston unit can be moved into the closed position.

Die erfindungsgemäße Lösung besteht im Prinzip darin, daß mit Hilfe des in die andere, in der Regel die untere Stützformhälfte eingelegten Folienbezugs und des beweglichen Ventilstößels ein Membranventil geschaffen wird, das die Öffnung des Einspritzkanals in den Formhohlraum nach Beendigung des Einspritzvorgangs schließt. Der Ventilstößel wird solange in Schließstellung gehalten, bis sich der Schäumprozeß soweit entwickelt hat, daß der Formhohlraum gefüllt und der Schaum erstarrt ist. The solution according to the invention is in principle that with the help of the film cover inserted into the other, usually the lower half of the support mold and the movable valve stem is provided with a diaphragm valve which has the opening the injection channel closes in the mold cavity after the injection process has ended. The valve tappet is held in the closed position until the foaming process begins has developed so far that the mold cavity is filled and the foam has solidified.

Anhand der Zeichnung wird die Erfindung näher erläutert. Die Zeichnung zeigt einen ausschnittsweisen Querschnitt durch eine Schäum-Stützform im Bereich des Einspritzkanals, seiner Öffnung in den Formhohlraum und des dort angeordneten Ventilstößels. The invention is explained in more detail with the aid of the drawing. The drawing shows a partial cross-section through a foam support mold in the area of the injection channel, its opening into the mold cavity and the one arranged there Valve tappet.

In der unteren Stützformhälfte 1 ist der mechanischpneumatisch oder hydraulisch bewegbare Ventilstößel 2 gegenüber der Öffnung 3 des in der oberen Stützformhälfte 8 befindlichen Einspritzkanals 4 angeordnet. Beim Einspritzen des Schaumstoffs in den Formhohlraum 5 befindet sich der Ventilstößel 2 in seiner in der unteren Stützformhälfte 1 zurückgezogenen (nicht dargestellten) Ausgangslage. Nach Beendigung des Einspritzens des Schaumstoffs in den Formhohlraum 5 wird der Ventilstößel 2 gegen die Kraft der Rückstellfeder 6 in die in der Zeichnung dargestellte Schließstellung bewegt. Dabei drückt der Ventilstößel 2 den Folienbezug 7 dichtend gegen die Öffnung 3 des Einspritzkanals 4. In the lower support mold half 1, the mechanical-pneumatic or hydraulically movable valve stem 2 opposite the opening 3 of the in the upper support mold half 8 located injection channel 4 is arranged. When injecting the foam into the mold cavity 5 is the valve stem 2 in its in the lower support mold half 1 withdrawn (not shown) starting position. After finishing the injection of the foam in the mold cavity 5, the valve stem 2 is against the force of the Return spring 6 moved into the closed position shown in the drawing. Included the valve tappet 2 presses the film cover 7 sealingly against the opening 3 of the injection channel 4th

Claims (1)

Durch chemische Reaktion entwickelt sich im Formhohlraum 5 der Schäumprozeß. Dabei kann das schäumende Material aus dem Formhohlraum nicht durch den Einspritzkanal 4 zurückströmen. The foaming process develops in the mold cavity 5 through a chemical reaction. In this case, the foaming material cannot leave the mold cavity through the injection channel 4 flow back.
DE19853507523 1985-03-04 1985-03-04 Foam supporting mould Expired DE3507523C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19853507523 DE3507523C1 (en) 1985-03-04 1985-03-04 Foam supporting mould

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853507523 DE3507523C1 (en) 1985-03-04 1985-03-04 Foam supporting mould

Publications (1)

Publication Number Publication Date
DE3507523C1 true DE3507523C1 (en) 1986-07-03

Family

ID=6264098

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19853507523 Expired DE3507523C1 (en) 1985-03-04 1985-03-04 Foam supporting mould

Country Status (1)

Country Link
DE (1) DE3507523C1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4867663A (en) * 1988-04-28 1989-09-19 Ats Automation Tooling Systems Inc. Seal for molded part insert
DE3914937A1 (en) * 1989-05-06 1990-11-08 Bayerische Motoren Werke Ag Back foaming tool - with upper and lower mould, hinged in gate and sealing facilities
WO2006069717A1 (en) * 2004-12-23 2006-07-06 Frimo Group Gmbh Method and device for the production of a thin-walled moulded part made of a foam material
FR2928579A1 (en) * 2008-03-11 2009-09-18 Faurecia Interieur Ind Snc Lining assembly for motor vehicle, has substrate delimiting injection hole that is closed by closure element to block passage of foam from inner volume towards exterior of substrate, where element is formed by skin having closure surface
FR2939706A1 (en) * 2008-12-16 2010-06-18 Faurecia Interieur Ind Inner trim element fabricating method for cab interior of motor vehicle, involves implementing partial obturation operation of one of injection sections to direct flow of fluid material to molding cavities so as to fill molding cavities
DE202014101574U1 (en) 2014-04-03 2014-05-13 Wis Tooling Gmbh Device for producing a foam-containing molding
EP2764973A1 (en) * 2013-02-12 2014-08-13 Dongshin Industry Inc. Expanded polypropylene foam-forming mold
DE102014104721A1 (en) 2014-04-03 2015-10-08 Wis Tooling Gmbh Apparatus for producing a foam-containing molding and method for producing a molding

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NICHTS-ERMITTELT *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4867663A (en) * 1988-04-28 1989-09-19 Ats Automation Tooling Systems Inc. Seal for molded part insert
DE3914937A1 (en) * 1989-05-06 1990-11-08 Bayerische Motoren Werke Ag Back foaming tool - with upper and lower mould, hinged in gate and sealing facilities
WO2006069717A1 (en) * 2004-12-23 2006-07-06 Frimo Group Gmbh Method and device for the production of a thin-walled moulded part made of a foam material
DE102004063403B4 (en) * 2004-12-23 2013-06-06 Frimo Group Gmbh Method and device for producing a thin-walled molded part made of foam
FR2928579A1 (en) * 2008-03-11 2009-09-18 Faurecia Interieur Ind Snc Lining assembly for motor vehicle, has substrate delimiting injection hole that is closed by closure element to block passage of foam from inner volume towards exterior of substrate, where element is formed by skin having closure surface
FR2939706A1 (en) * 2008-12-16 2010-06-18 Faurecia Interieur Ind Inner trim element fabricating method for cab interior of motor vehicle, involves implementing partial obturation operation of one of injection sections to direct flow of fluid material to molding cavities so as to fill molding cavities
EP2764973A1 (en) * 2013-02-12 2014-08-13 Dongshin Industry Inc. Expanded polypropylene foam-forming mold
DE202014101574U1 (en) 2014-04-03 2014-05-13 Wis Tooling Gmbh Device for producing a foam-containing molding
DE102014104721A1 (en) 2014-04-03 2015-10-08 Wis Tooling Gmbh Apparatus for producing a foam-containing molding and method for producing a molding

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Legal Events

Date Code Title Description
8100 Publication of the examined application without publication of unexamined application
D1 Grant (no unexamined application published) patent law 81
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee