Method and device for producing a brush
AssigneeG.B. Boucherie N.V.
InventorsBart Boucherie, Henk Vandenbussche
Life of this patent
Estimating the term…
Abstract
According to a method or an apparatus for fastening bristles in a bristle carrier (10) without using an anchor a heating (39) is provided in a tool part configured to transport the bristles. After inserting the bristles into anchoring openings (12) in the bristle carrier (10), the anchoring openings are closed by applying pressure.
Claims39
A method for producing a brush, which comprises a bristle carrier made of a thermoplastic resin having a front side and at least one opening, in which at least one bristle made of thermoplastic resin is inserted and anchored therein without using an anchor, the at least one opening does not extend completely through the bristle carrier, the at least one opening being encompassed by a rim at the front side, characterized by the following steps:
- the at least one bristle is accommodated in a receiving opening of a tool part,
- the at least one bristle is inserted with its fastening end into the at least one opening in the bristle carrier, which has been formed during producing the bristle carrier, while the least one bristle is still located in the receiving opening, without being fastened thereto,
- the tool part is heated, so that a front face of the tool part opposed to the front side of the bristle carrier is heated to a temperature below the melting temperature of the bristle material and/or of the bristle carrier material, in particular at maximum 85% in ° C. of the respective melting temperature of the bristle and/or the bristle carrier material,
- the tool part is maintained at a temperature greater than the bristle carrier and is moved into contact with the bristle carrier, so that the front face of the tool part contacts and heats the bristle carrier,
- the tool part applies a pressure force on the bristle carrier, and reshapes the bristle carrier at least in the region of the rim, which is encompassing the opening at the front side of the bristle carrier, by reducing the cross-section of the opening in a way, that the at least one bristle is embedded and anchored in the opening, and
- the tool part is moved relative to the bristle carrier away therefrom, so that the at least one bristle is pulled out of the receiving opening.
A method for producing a brush, which comprises a bristle carrier having a front side and including at least one opening and at least one bristle inserted into the at least one opening and anchored therein without using an anchor, the at least one opening does not extend completely through the bristle carrier, the at least one opening being encompassed by a rim at the front side, wherein the bristle carrier and the at least one bristle are formed of a thermoplastic resin, which may be of the same kind or may be of a different kind, characterized by the following steps:
- the at least one bristle is accommodated in a receiving opening of a tool part,
- the at least one bristle is inserted with its fastening end into the at least one opening of the bristle carrier, which has been formed during producing the bristle carrier, while the at least one bristle is still located in the receiving opening, without being fastened thereto,
- a front face of the tool part opposed to the front side of the bristle carrier is heated to a predetermined temperature, which lies in a range of between the ambient temperature and 210° C., in particular 150° C.,
- the tool part is maintained at a temperature greater than the bristle carrier and is moved relative to the bristle carrier, so that the tool part contacts and heats the bristle carrier, however without melting the bristle carrier and the at least one bristle,
- a pressure force is applied on the bristle carrier by the tool part, and the bristle carrier is reshaped at least in the region of the rim, which is encompassing the at least one opening at the front side of the carrier part, by reducing the cross-section of the opening in a way, that the at least one bristle is embedded and anchored in the opening, and
- the tool part is moved relative to the bristle carrier away therefrom, so that the at least one bristle is pulled out of the receiving opening.
Dependencies are inferred from the claim text.