Method for manufacturing a rubber article
AssigneeContinental Aktiengesellschaft
InventorsMartin Theusner, Hans-Hinrich Rickert
Life of this patent
Estimating the term…
Abstract
A method of manufacturing a rubber article includes the steps of shaping a green article and blowing a solvent-free powdery release agent made of powder particles onto the green article in order to coat the green article with the release agent. The release agent contains at least 10% vulcanized rubber powder and a compound preventing rubber adhesion within the release agent. During blowing an electrostatic potential difference is provided between the green article and the release agent for driving the powder particles of the release onto the green article. The green article coated with the release agent is subsequently placed into a vulcanization mold where the green article is vulcanized.
Claims21
A method of manufacturing a rubber article, said method comprising the steps of:
- a) shaping a green article;
- b) producing a vulcanized rubber powder from rubber mixtures containing anti-aging compounds but being free of fibers and butyl rubber;
- c) preparing a first solvent-free powdery release agent comprised of powder particles, the first release agent comprising
- 1) at least 10% of said vulcanized rubber powder and
- 2) a compound preventing rubber adhesion of the rubber powder particles within the first release agent;
- d) blowing the solvent-free powdery release agent onto the green article in order to coat the green article with the first release agent;
- e) providing during blowing an electrostatic potential difference between the green article and the first release agent for driving the powder particles of the first release agent onto the green article;
- f) placing the green article coated with the first release agent into a vulcanization mold;
- and
- g) vulcanizing the green article.
Dependencies are inferred from the claim text.