Brush, in particular toothbrush, manufacturing plant has demolding conveyer passing bristle filling station and product finishing equipment

摘要

An injection molding machine with tool produces brush bodies(5) which are demolded by transporting and holding members. The demolding equipment(3) has at least one bristle filling station(4) and post processing equipment(17,18,19) for finishing the brushes. Demolding equipment(3) comprises holders(9) for transporting inserts(7) with part cavities(6b). Clamps(14) on the inserts grip brush bodies during the filling operation, but leave the bristle hole area exposed. An inner section(21) of the demolding equipment moves into the tool during demolding and an outer section(16) lying outside the tool(2) supports one or more bristle filling stations(4). Demolding equipment(3) may comprise a linear conveyer with conveying members moving backwards and forwards and supporting one or more transporting inserts. Bristle filling stations are located between the outer end of the conveyer and the molding tool. Alternatively demolding equipment comprises an endless conveyer, preferably a chain(8), on which transporting inserts(7) are mounted. The chain passes around a diverting pulley(22) and the filling station is located between the pulley and the tool. Conveyer movement close to a filling station positions brush bodies(5) for filling with bristles. Transporting inserts can be coupled and uncoupled from the conveyer. The inner section of the conveyer runs along tool cavities in a cut-out(27) in the tool. When the tool is a multi-component tool the conveyer of the demolding equipment transfers performs from pre-injection stations(10) to finishing stations(11). The outer section(16) of the demolding equipment has one or more finishing units(18,19) for shearing off and/or profiling and/or grinding the bristles. A cooling station for injected brush bodies precedes the filling stations. The conveyer outer section may be a straight or angled extension of the inner section. It may also be curved or have a zig-zag form.