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AssigneeRobert Bosch GmbH
InventorsKurt Burger, Guenter Schneider, Klaus Burghoff, Thomas Weber, Jeanne Forget-Funk
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The invention is based on a method for coating at least one wiper blade element (10) made of an elastomer material, in which first, the surface of the wiper blade element (10) is cleaned and activated by means of a plasma, and then in a CVD process, a coating material is brought into a plasma state and at least one protective coating (64) forms on the surface of the wiper blade element (10), where a high-frequency voltage is applied to the region of the wiper blade element (10) oriented away from the protective layer (64) by means of an electrode (56). The invention proposes that before being brought into a treatment chamber (32, 34, 36, 38, 40, 74), the wiper blade element (10) be cut to a useful length (66) from a profiled band and placed on an electrode plate (56) so that its wiper lip (18) stands approximately perpendicular to the electrode plate (56), which extends to both sides of the wiper blade element (10), and is subjected to a plasma flow (50). (FIG. 2)
A method for coating at least one wiper blade element (10) made of an elastomer material, in which first, the surface of the wiper blade element (10) is cleaned and activated by means of a plasma, and then in a CVD process, a coating material is brought into a plasma state and at least one protective coating (64) forms on the surface of the wiper blade element (10), where a high-frequency voltage is applied to the region of the wiper blade element (10) oriented away from the protective layer (64) by means of an electrode (56), characterized in that before being brought into a treatment chamber (32, 10 34, 36, 38, 40, 74), the wiper blade element (10) is cut to a useful length (66) from a profiled band, is placed on an electrode plate (56) of a merchandise carrier (42), and is subjected to a plasma flow (50).
The method according to one of the preceding claims, characterized in that the pretreatment takes place at a pressure of approximately 0.1 to 100 mbar.
The method according to one of the preceding claims, characterized in that a thin bonding agent layer is applied to the wiper blade element (10).
The method according to one of the preceding claims, characterized in that the coating material, which is activated by means of a plasma, is comprised of low-molecular, cross-linkable, gaseous materials, halogen-containing, silicon-containing, carbon-containing, or metal-organic monomers.
The method according to one of the preceding claims, characterized in that the wiper blade element (10) rests with one side of the wiper lip (18) against an electrode plate (76).
The method according to one of the preceding claims, characterized in that the treatment steps are executed sequentially in different treatment chambers (32, 34, 36, 38, 40).
A device for executing the method according to one of the preceding claims, characterized in that the treatment chambers (32, 34, 36, 38, 40) have gas nozzles (52) whose openings are oriented toward the wiper lips (18) of the inserted wiper blade elements (10).
Dependencies are inferred from the claim text.