DE4243962A1 - Mould for e.g. tyres, with holes to allow venting of air only - Google Patents
Mould for e.g. tyres, with holes to allow venting of air onlyInfo
- Publication number
- DE4243962A1 DE4243962A1 DE19924243962 DE4243962A DE4243962A1 DE 4243962 A1 DE4243962 A1 DE 4243962A1 DE 19924243962 DE19924243962 DE 19924243962 DE 4243962 A DE4243962 A DE 4243962A DE 4243962 A1 DE4243962 A1 DE 4243962A1
- Authority
- DE
- Germany
- Prior art keywords
- mold
- mould
- wall
- cover
- air
- 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- Withdrawn
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
- B29C33/10—Moulds or cores; Details thereof or accessories therefor with incorporated venting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0606—Vulcanising moulds not integral with vulcanising presses
- B29D2030/0607—Constructional features of the moulds
- B29D2030/0614—Constructional features of the moulds porous moulds, e.g. sintered materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0606—Vulcanising moulds not integral with vulcanising presses
- B29D2030/0607—Constructional features of the moulds
- B29D2030/0617—Venting devices, e.g. vent plugs or inserts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
Die Erfindung bezieht sich auf eine Vorrichtung (Form) und ein Verfahren zur Herstellung von Gummi- oder Kunststoff gegenständen, insbesondere Kraftfahrzeugreifen, soweit dabei Formen verwendet werden, in die eine Rohmasse hineingedrückt wird.The invention relates to a device (form) and a process for the production of rubber or plastic objects, in particular motor vehicle tires, to the extent forms are used in which a raw mass is pushed in.
Es ist zum Beispiel bei der Herstellung von Reifen be kannt, die Entlüftung der Herstellungsformen mittels kleiner Bohrungen durch die Reifenform vorzunehmen. Dies hat den Nachteil, daß zusammen mit der bzw. im Anschluß an die verdrängte Luft aufgrund des Überdrucks in der Form auch Rohmasse durch die Bohrung gedrückt wird, wodurch unerwünschte Ansätze in der Art kleiner "Nippel" entstehen.It is used, for example, in the manufacture of tires knows, the ventilation of the manufacturing molds by means small holes through the tire shape. This has the disadvantage that together with or after the displaced air due to the excess pressure in the mold also raw mass is pressed through the bore, whereby undesirable approaches in the form of small "nipples" arise.
Dieser unerwünschte Effekt hat neben einem (an sich vermeidlichen) Materialverlust den Nachteil, daß die entstandenen Ansätze durch aufwendige Nachbearbeitungs verfahren (wie z. B. Schleifvorgänge) entfernt werden müssen - sei es aus funktionellen, ästhetischen oder sonstigen Gründen -, die nicht nur teuer, sondern auch unweltunfreundlich sind.This undesirable effect has a (in itself avoidable) material loss the disadvantage that the Approaches created through extensive post-processing procedures (such as grinding processes) are removed must - be it from functional, aesthetic or other reasons - which are not only expensive, but also are environmentally unfriendly.
Aufgabe der Erfindung ist es, eine Formentlüftung zu schaffen, bei der die abzuführende Luft entweichen kann, ohne daß die (ebenfalls durch Bohrungen o. ä.) in die Form eingebrachte Rohmasse zum Teil hinausgedrückt wird.The object of the invention is to mold release create where the air to be discharged can escape, without the (also through holes or similar) in the form the raw mass introduced is partially pushed out.
Die Lösung dieser Aufgabe besteht darin, daß die Forment lüftung durch eine Vielzahl von sich durch die Formwand hindurch erstreckenden Öffnungen vorgenommen wird, die so klein sind, daß die Rohmasse beim Einformvorgang nicht hindurchgedrückt wird.The solution to this problem is that the Forment ventilation through a variety of themselves through the mold wall extending openings is made, so are small that the raw mass is not during the molding process is pushed through.
Je nach den Eigenschaften (wie zum Beispiel Zähigkeit, Oberflächenspannung u. dergl.) der im Einzelfall ver wendeten Rohmasse sind hierbei unterschiedliche Durch messer bzw. Größen von Öffnungen geeignet. Mit steigender Zähigkeit und Oberflächenspannung eines verwendeten Roh materials sind dabei größere Öffnungen ausreichend.Depending on the properties (such as toughness, Surface tension u. the like.) ver The raw mass used is different knife or size of openings. With increasing Toughness and surface tension of a raw material used larger openings are sufficient.
Da die Entlüftung der Form beim Herstellungsvorgang relativ schnell erfolgen soll, ist bei kleiner Öff nungsgröße eine relativ große Zahl von Öffnungen erfor derlich. Dies kann zweckmäßig zum Beispiel dadurch erfol gen, daß mindestens eine (relativ große) Öffnung vorhanden ist, die innenseitig mit einer netzartigen Abdeckung ver sehen ist, welche bündig mit der Formwand abschließen kann. Hierdurch wird in einfacher Weise der Versperrungs effekt kleiner Öffnungen gegenüber einem zähen Medium mit Oberflächenspannung ausgenutzt.Because the mold is vented during the manufacturing process should take place relatively quickly, is small with public a relatively large number of openings such. This can be done expediently, for example gene that there is at least one (relatively large) opening is, the inside with a net-like cover ver see which is flush with the mold wall can. This is the blocking in a simple manner small openings compared to a viscous medium Utilized surface tension.
In einer bevorzugten Ausführungsform besteht die Abdeckung der Entlüftungsöffnung aus Sintermetall. Die poröse Struktur des Sintermetalls schafft eine im wesentlichen glatte Oberfläche mit einer großen Zahl feinster Poren bzw. Öffnungen, durch welche die abzuführende Luft entweichen kann. Die (ggf. unter Druck stehende) Formmasse dagegen wird durch die (Feinheit der) Öffnungen optimal zurückgehalten. Anstelle eines störenden und unter Umständen aufwendig zu entfernenden Ansatzes ergibt sich auf diese Weise allenfalls eine Stelle mit leicht erhöhter Rauhigkeit.In a preferred embodiment, the cover is made the ventilation opening made of sintered metal. The porous The structure of the sintered metal essentially creates one smooth surface with a large number of fine pores or openings through which the air to be discharged can escape. The molding compound (possibly under pressure) the (fineness of) openings, on the other hand, is optimal held back. Instead of an annoying and under This results in an approach that is difficult to remove in this way, at most, a position with a slightly higher Roughness.
Ein Ausführungsbeispiel für die vorliegende Erfindung ist nachstehend unter Bezugnahme auf eine Zeichnung näher erläutert.One embodiment of the present invention is below with reference to a drawing explained.
Die Zeichnung zeigt einen Ausschnitt aus einer im ganzen mit 1 bezeichneten Form zur Herstellung von Gummi- oder Kunststoffteilen. Die Formwand 2 der Form 1 trennt den Innenraum i der Form 1 vom Außenraum a.The drawing shows a section of a designated generally by 1 form for the manufacture of rubber or plastic parts. The mold wall 2 of the mold 1 separates the interior i of the mold 1 from the exterior a.
Zur Formgebung des Produkts können auf der Innenseite 2i der Formwand 2 vorstehende Stege 3 vorhanden sein. Um die bereichsweise zwischen einem Steg 3 und der Formwand 2 eingeschlossene Luft abzuführen, sind Entlüftungsbohrungen 4 vorgesehen, die den Innenraum i mit dem Außenraum a verbinden.In order to shape the product, webs 3 protruding on the inside 2 i of the mold wall 2 can be present. In order to discharge the air enclosed in some areas between a web 3 and the mold wall 2 , vent holes 4 are provided which connect the interior i to the exterior a.
Das innere Ende der Bohrung 4 ist mit einer Abdeckung 5 aus Sintermetall verdeckt. Die zum Innenraum i weisende Seite der Abdeckung 5 schließt dabei bündig mit der Innen seite 2i der Form 1 ab.The inner end of the bore 4 is covered with a cover 5 made of sintered metal. The side facing the interior i of the cover 5 is flush with the inner side 2 i of the form 1 .
BezugszeichenlisteReference list
1 Form
2 Formwand 2i Innenseite (von 2)
3 Steg
4 Entlüftungsbohrung
5 Abdeckung
i Innenraum (von 1)
a Außenraum (außerhalb von 1) 1 form
2 molded wall 2 i inside (of 2 )
3 bridge
4 vent hole
5 cover
i interior (of 1 )
a outside (outside of 1 )
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19924243962 DE4243962A1 (en) | 1992-12-23 | 1992-12-23 | Mould for e.g. tyres, with holes to allow venting of air only |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19924243962 DE4243962A1 (en) | 1992-12-23 | 1992-12-23 | Mould for e.g. tyres, with holes to allow venting of air only |
Publications (1)
Publication Number | Publication Date |
---|---|
DE4243962A1 true DE4243962A1 (en) | 1994-06-30 |
Family
ID=6476459
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19924243962 Withdrawn DE4243962A1 (en) | 1992-12-23 | 1992-12-23 | Mould for e.g. tyres, with holes to allow venting of air only |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE4243962A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2996798A1 (en) * | 2012-10-17 | 2014-04-18 | Michelin & Cie | PNEUMATIC MOLD MOLDING ELEMENT COMPRISING A PLURALITY OF HOLES |
US20160039160A1 (en) * | 2012-10-17 | 2016-02-11 | Compagnie Generale Des Etablissements Michelin | Molding element for a tire mold comprising a porous area |
-
1992
- 1992-12-23 DE DE19924243962 patent/DE4243962A1/en not_active Withdrawn
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2996798A1 (en) * | 2012-10-17 | 2014-04-18 | Michelin & Cie | PNEUMATIC MOLD MOLDING ELEMENT COMPRISING A PLURALITY OF HOLES |
WO2014060207A1 (en) * | 2012-10-17 | 2014-04-24 | Compagnie Generale Des Etablissements Michelin | Moulding element of a mould for a tyre, comprising a plurality of holes |
US20160039160A1 (en) * | 2012-10-17 | 2016-02-11 | Compagnie Generale Des Etablissements Michelin | Molding element for a tire mold comprising a porous area |
US9346230B2 (en) * | 2012-10-17 | 2016-05-24 | Compagnie Generale Des Etablissements Michelin | Molding element for a tire mold comprising a porous area |
US9352522B2 (en) | 2012-10-17 | 2016-05-31 | Compagnie Generale Des Etablissements Michelin | Molding element of a mold for a tire, comprising a plurality of holes |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8139 | Disposal/non-payment of the annual fee |