Method for manufacturing brushes

Abstract: Method for manufacturing brushes, whereby brush bodies (2) which are provided with openings (12) according to a specific hole pattern are supplied to a filling station (6), whereby bundles of fibres (7) are provided in the openings (12) in this filling station (6), characterized in that each brush body (2) is successively presented to at least two filling tools (13-14) in this filling station (6), whereby each filling tool (13-14) fills the entire hole pattern with bundles of fibres (7) in different steps, and whereby at each step, each of the filling tools (13-14) fills the same part (A-B) of said hole pattern in different brush bodies (2).

Description: The present invention concerns a method for manufacturing brushes, in particular of the type whereby brush bodies which are provided with openings are supplied to a filling station, whereby bundles of fibres are provided in the openings in this filling station, whereby each brush body is successively presented to at least two filling tools in the filling station. Such a method is known from DE-A-3018178, which represents the preamble of claim 1. In the first place, it is meant for the manufacturing of tooth brushes, but in general it can also be used for manufacturing other brushes. It is known that the output of a brush manufacturing machine strongly depends on the continuity with which the brush bodies and brushes can be carried through the different processing stations. The invention aims a method for manufacturing brushes whereby this continuity is optimally guaranteed and a high output is obtained. To this end, the invention aims a method of the above-mentioned type, characterized in that each filling tool fills the entire hole pattern with bundles of fibres in different steps, and whereby at each step, each of the filling tools fills the same part of said hole pattern in different brush bodies. The number of filling tools used is preferably equal to the number of steps in which each brush body is filled. Preferably, the brush bodies which are positioned in front of the filling tools, as well as any brush bodies possibly situated in between, are held on a common moveable support during the filling, one and other such that the filling tools only have to carry out a filling movement. According to the most preferred embodiment, each filling tool will alternately fill different parts of the succeeding brush bodies, which offers the advantage that the filling tools can be placed symmetrically in relation to one another, so that the use of a common drive does not cause any problems. Other particular embodiments of the invention are set out in claims 5-10. In order to better explain the characteristics of the invention, the following preferred embodiment is given as an example only without being limitative in any way, with reference to the accompanying drawings, where: figure 1 is a schematic representation of a brush manufacturing machine which applies the method according to the invention; figure 2 is a schematic representation of the filling tools from figure 1 and a number of brush bodies placed in front of it; figure 3 shows a view according to line III-III in figure 2; figure 4 shows a section according to line IV-IV in figure 3; figures 5-6, 7-8, 9-10, 11-12 and 13-14 show views for different positions which are analogous to those in figures 2 and 3. Figure 1 is a schematic representation of a brush manufacturing machine 1. Hereby, brush bodies 2 are provided in brush body holders 4 by means of a supply mechanism 3 which cooperate with an endless conveyor element 5, such as a chain or the like. The conveyor element 5 brings the brush body holders 4 with the brush bodies 2 provided therein to different processing stations, including at least a filling station 6 where bundles of fibres 7, designed to form the brush hairs, are provided in the brush bodies 2. Further, other processing stations can be provided, such as cutting stations 8 where the bundles of fibres 7 are cut at the required length, stations 9 where the far ends of the brush hairs are rounded off, a cleaning station 10 and possibly also other stations, for example for branding, for quality control, etc. Finally, the brush bodies 2 are removed by means of removal means 11. A device with such an endless conveyor element 5 is already known from EP 563.419. As shown in the figures 1 to 3, the bundles of fibres 7 are provided in the brush bodies 2 in a known manner, since the brush bodies 2 with the openings 12 provided therein are placed in front of filling tools 13 and 14 which fill the brush bodies 2, in other words put bundles of fibres 7 in the above-mentioned openings 12. The invention is special in that each brush body 2 is successively presented to several filling tools in the filling station, in this case two, which each fill a part, the parts A and B in the embodiment represented in figure 3, of the brush body 2, whereby the brush bodies 2 situated opposite the filling tools 13-14, are moved synchronously, and whereby each filling tool 13-14 fills the entire hole pattern with bundles of fibres 7 in different steps and whereby, at each step, each of the filling tools 13 and 14 fills the same part, A or B respectively, of this hole pattern in different brush bodies 2. As shown in figure 1, the brush bodies 2 which are positioned in front of the filling tools 13-14, as well as any brush bodies 2 possibly situated in between, are held on a common moveable support 15 during the filling which carries out the positioning movements X and Y, and possibly also Z, for the filling tools 13-14. The filling tools 13-14 preferably only carry out a back and forth movement Z which is perpendicular to the plane formed by X and Y. In the case where, as represented in the figures, use is made of two filling tools 13-14, a part - A or B - of each brush body 2 which corresponds to almost half of it, is filled by the one filling tool 13, after which the remaining part, B or A respectively, is filled by the other filling tool 14. The brush bodies 2 are conveyed in steps through the filling station 6. Preferably, the number of so-called indexes to convey a brush body 2 from a filling tool 13 to a subsequent filling tool 14 is an odd number. As shown in figure 2, the movement of the brush bodies 2 between the filling tools 13 and 14 is preferably carried out with three indexes, S1, S2 and S3 respectively. As shown in the figures 2 to 14, different parts of the succeeding brush bodies 2 are preferably alternately filled at each filling tool 13 and 14. This implies that the filling tools 13 and 14, as shown in the figures 2 and 3, first provide the parts A of the brush bodies 2 presented to them with bundles of fibres, and at a following step, as shown in the figures 5 and 6, provide the parts B of the subsequent brush bodies 2 with bundles of fibres 7, and further alternately so. As represented in the figures 7 to 14, brush bodies 2 are finally obtained of which both the parts A and B are provided with bundles of fibres. Depending on how the process was started, as shown in the figures 9 to 14, the first three brushes will not be completed filled after each start and they are to be regarded as waste. The above-mentioned method allows for very rapid filling and also makes sure that the brush bodies 2 only need to be present under a filling tool 13 or 14 for a short while, so that they can be moved in steps at very short intervals. It is clear that the invention is not restricted to brush manufacturing machines of the type whereby the movement along the different processing stations is carried out by means of an endless conveyor element 5. It is also clear that there can be more than two filling tools, for example three, whereby in this case each filling tool provides 1/3 of a brush body with bundles of fibres.

Claims: Method for manufacturing brushes, whereby brush bodies (2) which are provided with openings (12) according to a specific hole pattern are supplied to a filling station (6), whereby bundles of fibres (7) are provided in the openings (12) in this filling station (6), characterized in that each brush body (2) is successively presented to at least two filling tools (13-14) in this filling station (6), whereby each filling tool (13-14) fills the entire hole pattern with bundles of fibres (7) in different steps, and whereby at each step, each of the filling tools (13-14) fills the same part (A-B) of said hole pattern in different brush bodies (2). Method according to claim 1 or 2, characterized in that the number of filling tools (13-14) is equal to the number of steps in which each brush body (2) is filled. Method according to claim 1 or 2, characterized in that the brush bodies (2) which are positioned in front of the filling tools (13-14), as well as the brush bodies (2) which are possibly situated in between, are held on a common moveable support (15) during the filling. Method according to any of the preceding claims, characterized in that different parts (A-B) of the succeeding brush bodies (2) are alternately presented to each filling tool (13-14). Method according to any of the preceding claims, characterized in that two filling tools (13-14) are used. Method according to claim 5, characterized in that the brush bodies (2) are conveyed in steps through the filling station (6) and in that the number of indexes (S1-S2-S3) to convey a brush body (2) from a filling tool (13) to a subsequent filling tool (14) is an odd number. Method according to claim 6, characterized in that the number of indexes (S1-S2-S3) is three. Method according to any of claims 3 to 7, characterized in that a part (A-B) of each brush body (2) which corresponds to almost half of it, is filled by the one filling tool (13), whereas the remaining part (B-A) is subsequently filled by the other filling tool (14). Method according to any of the preceding claims, characterized in that the brush bodies (2) to be filled are provided in brush body holders (4) on an endless conveyor element (5); in that the brush bodies (2) are subsequently carried along different processing stations (6-8-9-10), including the filling station (6); in that the brush body holders (4) with the brush bodies (2) provided therein are temporarily removed from the endless conveyor element (5) in the filling station (9) and are placed on a support (15) which carries out at least the movements (X-Y) to position the brush bodies (2) with their openings (12) in front of the filling tools (13-14) concerned; and in that the brush bodies (2), after they have been carried along the above-mentioned processing stations (6-8-9-10), are removed from the brush body holders (4). Method according to any of the preceding claims, characterized in that it is used for manufacturing tooth brushes.

Inventors: BOUCHERIE LEONEL, BOUCHERIE, LEONEL POLYDORE
Applicants: BOUCHERIE NV G B, FIRMA G.B. BOUCHERIE, NAAMLOZE VENNOOTSCHAP
Application year: 1995
Main classification: A46D3
IPC codes: A46D3