INProfile Issue 3 | Page 22

Just a trim The quality of finish required when trimming veneers and laminates can only be achieved by using precision router cutters designed specifically for this purpose. ost of the furniture that we come into contact with today, in the home or at work, is made of faced sheet materials. That is, a veneer or facing of real wood, plastic, metal foil or resin impregnated paper glued to a base or core of MDF, plywood, chipboard or other stable material. M Whichever facing or laminate is used, it will need to be trimmed flush with the edges of the base material. This is where the router and tungsten carbide tipped trimming cutters come into their own. Light and portable, the router can be taken to the ‘job’, or inexpensively built into laminating machines and presses where the board can be faced, edged and trimmed, in one continuous process. It is not only veneers and laminates that can be trimmed in this way, selfguiding trimming cutters can also be used for producing and finishing template and pattern work, saving both time and cost over traditional hand finishing methods. Template Profiling Veneer and Laminate Trimming Bonding To produce a smooth square edge, the edges of the board itself must be cut true and finished square and smooth. The reason for this is that the trimming cutter is guided by a flush guide bearing that follows the board edge, reproducing the exact contour, straight or curved. All trimming and profiling cutters follow this simple basic concept, however they do vary in some aspects. In particular, the number of cutting edges and the cutter profile. Bearing guided trimming and profiling cutters are fitted with guide bearings that are marginally oversize to minimise the effects of surface scoring and to avoid any cut-back of the veneer edge to produce a sharp, square corner when jointing or facing the trimmed edge. Adhesives Whichever adhesive is used to bond the facing to the base material, two important points must be observed. The first is that the adhesive must be allowed to dry or set thoroughly before trimming