DE2238625A1 - Rubber core mould - with metal insert, for plastic foam dashboards - Google Patents
Rubber core mould - with metal insert, for plastic foam dashboardsInfo
- Publication number
- DE2238625A1 DE2238625A1 DE19722238625 DE2238625A DE2238625A1 DE 2238625 A1 DE2238625 A1 DE 2238625A1 DE 19722238625 DE19722238625 DE 19722238625 DE 2238625 A DE2238625 A DE 2238625A DE 2238625 A1 DE2238625 A1 DE 2238625A1
- Authority
- DE
- Germany
- Prior art keywords
- core
- dashboards
- rubber
- plastic foam
- metal insert
- 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.)
- Pending
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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
- B29C33/48—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling
- B29C33/485—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling cores or mandrels
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
- B29C33/48—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling
- B29C33/50—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling elastic or flexible
- B29C33/505—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling elastic or flexible cores or mandrels, e.g. inflatable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/24—Pipe joints or couplings
- B29L2031/243—Elbows
Abstract
Description
Kernform Kernformen werden, wenn sie zur Wiederverwendung geeignet sein sollen, aus Metall hergestellt. Wenn die zu formenden Innenräume Hinterschneidungen, zum Beispiel Nuten oder Krümmungen, aufweisen, dann wird der Aufbau der metallischen Kernformen kompliziert, weil sie aus zerlegbaren Segmenten gebildet werden, um ein Ziehen nach der Herstellung des Formkörpers zu ermöglichen. Core shape Core shapes become suitable for re-use when they are should be made of metal. If the interiors to be formed have undercuts, for example grooves or curvatures, then the structure becomes metallic Core shapes are complicated because they are formed from collapsible segments to make a Allow drawing after the production of the molded body.
Auch bei der Herstellung von Körpern, zum Beispiel von Armaturen aus Kunststoff, zum Beispiel Schaum-Kunststoff, verwendete man bisher die obengenannten aus zerlegbaren Segmenten gebildeten Kernformen.Also in the manufacture of bodies, for example from fittings Plastic, for example foam plastic, has hitherto been used as mentioned above Core shapes formed from separable segments.
Die Erfindungsaufgabe besteht in der Ausführung einer Kernform zur Herstellung von Körpern aus Kunststoff mit Hinterschneidungen, die wiederverwendbar und dennoch in ihrem Aufbau weniger kompliziert ist als die Kernformen nach dem Stand der Technik.The task of the invention consists in the execution of a core shape for Manufacture of bodies from plastic with undercuts that are reusable and yet is less complicated in its structure than the core forms according to the State of the art.
Bei Anwendung der Lehre nach dem kennzeichnenden Teil des Hauptanspruches besteht die Kernform im Bereich der Hinterschneidungen aus Gummi, das sich auf den metallischen Stützkern abstützt. Das Gummi ist als Werkstoff für eine #ernform zur Herstellung von Kunststoffteilen, insbesondere Schaum-tunststoffteilen, geeignet, weil es 1leim Gießen oder Spritzen seine Form nicht verändert und die dabei auftretenden Temperaturen ohne Be schädigung übersteht. Nach dem Erhärten des Kunststoffes kann man die kornform herausziehen, was dadurch möglich wird, daß die Gummiteile, welche die Hinterschneidungen bilden, sich elastich verformen und sich dem engeren Bereich des Innenraumes, durch den sie gezogen werden, anpassen können. Bei kleineren Hinterschneidungen können #ernmantel und Abstützkern zusammen gezogen werden. Sind größere Hinterschneidungen vorhanden, so zieht man zuerst den Abstützkern einzeln und dann den Kernmantel, der sich dann als rohrartiger Körper noch mehr verformen kann. Auf jeden Fall nehmen die Gummiteile nach dem Ziehen ihre ursprüngliche Gestalt an, so daß die Kernform wieder neu verwendbar ist.When applying the teaching according to the characterizing part of the main claim the core shape is in the area of the undercuts made of rubber, which is supported on the metallic support core. The rubber is used as a material for a #ernform for the production of plastic parts, especially foam plastic parts, suitable because it does not change its shape and the 1leim pouring or spraying Withstands the temperatures occurring without damage. After hardening of the plastic you can pull out the grain shape, which is possible because the rubber parts that form the undercuts deform elastically and adapt to the narrower area of the interior through which they are drawn can. In the case of smaller undercuts, the core and support core can be combined to be pulled. If there are larger undercuts, pull the one first Support core individually and then the core mantle, which then turns out to be a tubular body can deform even more. In any case, after pulling the rubber parts take theirs original shape, so that the core shape can be used again.
Ein Ausführungsbeispiel der Erfindung wird im folgenden näher beschrieben unter Bezugnahme auf die Zeichnungen.An embodiment of the invention is described in more detail below with reference to the drawings.
Fig. 1 zeigt einen Längsschnitt durch einen Rohrkrümmer ohne Kernform, Fig. 2 zeigt den gleichen Schnitt mit zwei eingesetzten Kernformen, Fig. 3 veranschaulicht das Ziehen der Abstützkerne nach der Erstarrung des Kunststoffes, Fig. 4 zeigt, wie danach die Kernmäntel gezogen werden.Fig. 1 shows a longitudinal section through a pipe bend without a core shape, Fig. 2 shows the same section with two inserted core shapes, Fig. 3 illustrates the pulling of the support cores after the plastic has solidified, Fig. 4 shows, how then the core coats are drawn.
Es wird zunächst auf Fig. 1 Bezug genommen.Reference is first made to FIG. 1.
Im Durchflußraum 3 des Rohrkrümmers 1 sollen die Nuten 2 angeformt werden, die zum Beispiel zur Aufnahme von Dichtungen und dergleichen dienen. 4 ist eine Innenkrümmung des Durchflußraumes.In the flow space 3 of the pipe bend 1, the grooves 2 are to be formed that are used, for example, to accommodate seals and the like. 4 is an inner curvature of the flow space.
Für die Ausbildung des gesamten Durchflußraumes 3 dienen die beiden Kernteile 10 und 20, erkennbar aus Fig. 2.For the formation of the entire flow space 3, the two are used Core parts 10 and 20, recognizable from FIG. 2.
Jedes Kernteil besteht aus dem metallischen Abstützkern 11 bzw. 21, jeweils von einem rohrartigen Kernmantel 12 bzw. 22 aus Gummi umgeben. Die Kernmäntel bilden die Hinterschneidungen in Form der Wülste 12a bzw. 22a, welche die Nuten 2 des Durchflußraumes formen. Ebenso werden die Flächen der Innenkrümmung 4 durch Vorsprünge 12b bzw. 22b der Kernmäntel der Kernteile 10 und 20 gebildet.Each core part consists of the metallic support core 11 or 21, each surrounded by a tubular core jacket 12 or 22 made of rubber. The core coats form the undercuts in the form of the beads 12a and 22a, which form the grooves 2 of the flow space. Likewise, the surfaces of the inner curvature 4 are through Projections 12b and 22b of the core shells of the core parts 10 and 20 are formed.
Mit den Anlageflächen 11b bzw. 21b stoßen die Abstützkerne aneinander. Die Außenkruinmung des Innenraumes wird durch entsprechend gekrümmte Formflächen 11a, 21a der Abstützkerne 11 bzw. 21 gebildet.The support cores abut with the contact surfaces 11b and 21b. The outer curvature of the interior is created by correspondingly curved shaped surfaces 11a, 21a of the support cores 11 and 21, respectively.
Das Entformen nach dem Erhärten des Kunststoffes erfolgt bei dem Ausführungsbeispiel in zwei Arbeitsgängen. Zunächst werden die beiden Abstützkerne 11 und 21 gezogen, wie aus Fig. 3 hervorgeht. Zum Ansetzen der Ziehvorrichtun Fsind Überstände llc und 21c vorgesehen. Dann werden die beiden kernmäntel 12 und 22 gezogen, wie auf Fig. 4 dargestellt. Auch hier sind Überstände 12d und 22 d vorgesehen. -Das Ziehen ist dadurch möglich, daß sich die Wülste 12a bzw.In the exemplary embodiment, demolding takes place after the plastic has hardened in two steps. First, the two support cores 11 and 21 are pulled, as can be seen from FIG. 3. To attach the pulling device Fsare protrusions llc and 21c provided. Then the two core sheaths 12 and 22 are drawn, as shown on Fig. 4 shown. Also here are Projections 12d and 22d are provided. -Drawing is possible because the beads 12a or
22a und die Vorsprünge 1 2b b zw. 22b nach innen elastisch verformen können, so daß sie sich dem Querschnitt des Durchflußraumes 3 anpassen können, durch den sie gezogen werden. Nach dem vollständigen Herausziehen erfolgt eine elastische R~ckverformung, so daß die kernteile wieder neu verwendbar sind; Wenn die Hinterschneidungen nur geringfügig sind, so können gegebenenfalls die ~ernmäntel zusammen mit den Abstützkernen in einem Arbeitsgang gezogen werden.22a and the projections 1 2b b between 22b elastically deform inward can so that they can adapt to the cross section of the flow space 3 through that they are drawn. After it has been pulled out completely, there is an elastic Back deformation so that the core parts can be reused; When the undercuts are only slightly, so the ~ ernmäntel can optionally together with the support cores can be drawn in one operation.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19722238625 DE2238625A1 (en) | 1972-08-05 | 1972-08-05 | Rubber core mould - with metal insert, for plastic foam dashboards |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19722238625 DE2238625A1 (en) | 1972-08-05 | 1972-08-05 | Rubber core mould - with metal insert, for plastic foam dashboards |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2238625A1 true DE2238625A1 (en) | 1974-02-14 |
Family
ID=5852772
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19722238625 Pending DE2238625A1 (en) | 1972-08-05 | 1972-08-05 | Rubber core mould - with metal insert, for plastic foam dashboards |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2238625A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2574015A1 (en) * | 1984-12-04 | 1986-06-06 | Huels Chemische Werke Ag | TOOL FOR MANUFACTURING MOLDED PIECES AND USE THEREOF |
EP0536911A1 (en) * | 1991-10-08 | 1993-04-14 | Minnesota Mining And Manufacturing Company | Mandrel and a method of making a rigid tubular article |
EP0852993A1 (en) * | 1997-01-10 | 1998-07-15 | Tauvi, S.A. | Core for moulding an elbow in a mould and process for said moulding |
DE19929132C1 (en) * | 1999-06-25 | 2000-12-28 | Martin Wegen | Casting internal lining of pipe bend, is aided by multilayer flexible casting core from which layers are removed selectively and sequentially, once lining plastic has set |
DE202015102165U1 (en) | 2014-05-16 | 2015-07-24 | Demolastic Gbr (Vertreten Durch Die Gesellschafter: Horst Huke, 29664 Walsrode Und Jörg Kross, 37120 Bovenden) | Device for the original production of a shaped body and forming tool part and coupling body |
-
1972
- 1972-08-05 DE DE19722238625 patent/DE2238625A1/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2574015A1 (en) * | 1984-12-04 | 1986-06-06 | Huels Chemische Werke Ag | TOOL FOR MANUFACTURING MOLDED PIECES AND USE THEREOF |
EP0536911A1 (en) * | 1991-10-08 | 1993-04-14 | Minnesota Mining And Manufacturing Company | Mandrel and a method of making a rigid tubular article |
US5350139A (en) * | 1991-10-08 | 1994-09-27 | Minnesota Mining And Manufacturing Company | Mandrel for making a rigid tubular article |
US5433902A (en) * | 1991-10-08 | 1995-07-18 | Minnesota Mining And Manufacturing Company | Method of making a rigid tubular article |
EP0852993A1 (en) * | 1997-01-10 | 1998-07-15 | Tauvi, S.A. | Core for moulding an elbow in a mould and process for said moulding |
ES2147482A1 (en) * | 1997-01-10 | 2000-09-01 | Tauvi Sa | Core for moulding an elbow in a mould and process for said moulding |
DE19929132C1 (en) * | 1999-06-25 | 2000-12-28 | Martin Wegen | Casting internal lining of pipe bend, is aided by multilayer flexible casting core from which layers are removed selectively and sequentially, once lining plastic has set |
DE202015102165U1 (en) | 2014-05-16 | 2015-07-24 | Demolastic Gbr (Vertreten Durch Die Gesellschafter: Horst Huke, 29664 Walsrode Und Jörg Kross, 37120 Bovenden) | Device for the original production of a shaped body and forming tool part and coupling body |
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