Biscuit joiner
The biscuit (also shaped spring or wood bonding pads with the brand name Lamello or LFF (from " Lamello form spring " ) ) is a used to wood connection in the joinery industry about lenticular, usually crafted from beech wood flakes.
Application
To make the connection, a groove is cut with a biscuit jointer in each of the components to be connected in the biscuit is glued with wood glue.
In contrast to the conventional cylindrical wooden dowels, the connection must be less accurately prepared. In the groove direction of the biscuit is movable. To cross, there is a small possibility of adaptation, because of the flat anchors mounted with clearance in the groove. With the moisture of the glue swells the anchor, and the game disappears. (If cross- adaptation was necessary, the parts against the spring forces are mutually to clamp until the glue and biscuit are dry. )
With a biscuit creates a tighter wood joint, because the contact area is larger than that of the cylindrical wooden dowels. Biscuit are available most 4 mm thick and in various widths.
History
Around the middle of the 20th century came in Switzerland, the clamping plate on the market. The plates were then with today's quality is not comparable: They were very porous and brittle, because the wood chips were poorly glued and pressed together.
Herman Steiner, founder of Lamello AG, looking for a way to combine this new material. The known compounds with wooden dowels or tongue and groove dropped out because of disadvantages. The time required for the groove and tongue joint groove provided weak edges on the porous particleboard. The continuous groove walls broke off easily. The anchors have the advantage that they break less easily from a plate edge. But they must be highly accurate positioning and offer no possibility of correction in the mutual position of the parts to be joined.
In 1956 under the brand name Lamello biscuit placed on the market only needs a short groove in which he is still somewhat longitudinally displaceable with necessary corrections. Biscuit have since been widely used in professional and semi-professional woodworking.
Since 2005 is a new generation of flat plugs on the market that no longer exist in solid wood, but from a wood fiber-based materials. There are also flat anchor made of plastic or aluminum.
Sizes
Manufacturer Information:
- Size 20: 56/23/4 mm
- Size 10: 53/19/4 mm
- Size 0: 47/15/4 mm
- Size H9: 38/12/3 mm
- S6 Size: 85/30/4 mm
Pictures
Glued laminated
Basic pattern
Composite plugged with Aluminiumlamello
Inspection principle
Solved composite