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Highlights from Ligna.


Second of two parts

It was out of necessity that a war-torn Europe took an American innovation - particleboard - and elevated it to new heights for making cabinets and furniture. And it was because of this necessity that much of the world's leading edge technology for manufacturing and machining composite panels has emerged.

But, although panel processing technology has been the major woodworking machinery export from the other side of the Atlantic, it should not imply that European equipment manufactures have stood still in the area of solid wood machinery. That misnomer was dispelled loud and clear at the Ligna Hannover Fair, where German, Italian and other Euro-based companies showed a wealth of new or improved technology encompassing everything from lumber defect optimizing systems to computer controlled machining lines for manufacturing windows.

Additionally, several manufacturers of finishing equipment displayed their newest concepts for reducing finishing emissions and reclaiming overspray solvents to minimize waste.

Some of these and other Ligna Fair highlights follow.


Under a circus big top before a festive crowd of more than 800 people, Michael Weinig unveiled its newest moulder, the Unimat 23. The Unimat 23 features newly designed spindles to ensure precision and stability and is equipped with a feed system involving compressed air pressure contacts and adjustable feed shafts. A new safety hood reduces dust and noise levels.

SCMI's Superset 23 features a patented set-up for reducing downtime between profile changes. When changing over work processing to a new diameter tool, working thickness or width, feed rollers and pressures.

Lumber optimizing

The Omga T620 optimizing cut-off saw from Derda Inc. is designed for a wide range of applications including: carpentry and joinery, door and window frame, furniture and pallet making. Automatic workpiece clamping is cycle with blade feed. The system can be completed with roller tables idle or motor outfeed conveyor belts with manual or pneumatic length stops to create a semi-automatic cut-off line.

Dimter displayed a system that links a scanner to two optimizing cross-cut saws. The system offers automatic electronic four-sided defect detection with an integrated measuring station and a computer for optimization. A transfer station connects the two saws.

Panhans presented a new crosscut saw for postforming profiles without tearout, available from Midwest Automation. The saw can memorize up to 99 profiles.

GreCon Electronics introduced the Superscan, a software-based, lumber optimization program that was shown in tandem with the company's model 2000 cut-off saw. Defects, including knots, cracks, resin pitches, etc. are recognized on all four sides by CCD camerass and are evaluated by the new 3-D rotational optimizer. Up to 10 different grade fields can be defined per board side.

Finishing and sanding

Delle Vedove displayed the SLA in-line moulding sprayer featuring a built-in water-wash system to reduce time-consuming clean-up. Two separate spray stations allow the positioning of four guns for 3-D spraying up to 300 fpm.

The Eurotecno ET/7 ECO from Rhodes Machinery features a system for recovering overspray lacquer from the belt and is designed to reduce the emission of solvents and solid residues from reaching the air. It also features the ability to protect sprayed lower side of the panel from overspray.

Coral's Polivar filter benches feature a series of slots to remove noxious fumes and dust as they are generated, thus preventing them from being breathed by the operator.

Buetfering's AWS 2K/2KC widebelt sanders from Force Machinery feature an electronically controlled air cushion sanding pad, which lowers and raises itself according to the infeed speed and workpiece length. Also featured is a floating infeed table for tolerance compensation for veneer sanding or fixed infeed table for calibrating.

Makor introduced the Model 7LTT automatic sanding and buffing machine for linear frames. The system is available in the U.S. from Derda Inc.

A new CNC axis control system has been developed for the Heesemann UKP 20 profile sanding machine, distributed in the U.S. by European Woodworking Machinery. For the first time, the motor and control form one unit. Accuracy of position regulation and position memory is said to be in the range of hundredths of 1mm.

QuickWood displayed the Model QB, a brush-backed sanding drum for sanding items without sharp edges such as furniture, doors, table tops, etc. The modularly built drum allows the brushes to be changed when they wear out. The slashed abrasive is available in grit 80-220.

QuickWood also showed the Model QD oscillating Quick Discs for wood finishing and sealer sanding/denibbing. The oscillating movement is said to give a fine surface before first coat and an even breaking on sharp edges.

Window, door and stair machinery

The Stegherr DD from E & R Supply Co. is a computer-controlled, on-line double-sided boring machine. It features X and Y axis control for producing any boring configuration of stiles. It is fully programmable for just-in-time manufacturing of window and door stiles.

The Stegherr DS2, also from E & R Supply, is a three-in-one dowelling station. It performs stile and rail boring gluing and dowel inserting on a fully programmable basis.

SCMI displayed an NC window machining line 5 S composed of an automatic double-sided tenoner, transfer/feeder, profiling moulder with multi-tool spindles, transfer with double sorting, centralized NC-control unit. The tenoning machine features two beams - one fixed and the other mobile on cross-slideways.

SCMI also showed the Method K window production system for smaller sized firms. Manual tool changes are eliminated due to the multi-stack tenoning spindles which can be equipped with 10 to 11 tools and the multi-stack profiling spindles with a separate hardware grooving unit to carry out work required on each element of the window in one run.

W. A. Fell & Co. introduced the highspeed HT lathe for making baluster spindles. During the show, the company demonstrated a production cycle time of 13 seconds with minimal scrap, using a low-grade southern yellow pine.

W.A. Fell also showed the HUA newel post turniing machine. The company demonstrated how it can make full-length newels from 90mm squares, turning the ball top and center portion in Canadian hemlock.

Celaschi showcased a computerized system that uses a moulder for calibrating material followed by automatic infeed into a Celaschi double-end tenoner for producing both frame and sash components. The workpiece is then transferred directly into a Celaschi Model PA for lineal profiling. The system, available in the U.S. from Danckaert Woodworking Machinery Co., is targeted at both custom and volume window manufacturers.

Other developments

Compak System Ltd. displayed a complete system for producing composite panels from a variety of recyclable agricultural wastes including cotton stalks, rice, sugar cane and wheat straw. Standard sized particleboard from 4mm to 20mm thick can be produced using a formalde-hyde-free binder.

The Tecno Systems RDM 330/2 edge-banding, laminating and slitting machine from Stefani Group America combines a finished melamine decorative laminate (65g or 23g) with one or more kraft paper backers using a PVAc adhesive. The machine also slits the continuous laminate into specific widths for edgebanding, laminating and softforming.

Koch Machinery Ltd. showed the SBD Compact, a sawing, boring and dowel driving machine. The machine features working stations with a swivel capacity of +30 to -90 [degrees] and with a tilt capacity of 45 [degrees] up and 15 [degrees] down. It can handle stock dimensions up to 2,500mm long, 200mm wide (square cut) and 80mm thick.

Balestrini introduced the Pragma oscillating slot mortiser sold and serviced by Solid Wood Systems. Features include zero point reference and the ability to mortise four different slot sizes. The machine can be equipped with up to six heads.

Schneeberger displayed the new Gemini NC tool and cutter grinder offered in the U.S. by Colonial Saw. The system is designed to maximize operator comfort.

Torwegge, (European Woodworking Machinery), introduced the H 600 double and tenoner, a versatile machine for solid wood processing. Machining capabilities include: jump scoring and hogging, twin hogging, twin milling, grooving and rebating, tenoning, jump grooving, top and bottom profile cutting, top chamfering, multi grooving, panel and frame milling, corner rounding, electronic contour milling, profile sanding and tenoning and slotting. lb Obel Pedersen's automated HF-Wideband presses for gluing solid wood pieces for panels, tabletops, laminated beams, etc. reportedly can produce up to [7,000m.sup.2] per 8-hr shift.

PHOTO : Wadkin introduced the CNC Omniset, which it hailed as "the only fully

automatic moulder setting system." The company says the CNC system greatly reduces set-up tiime because it automatically and simultaneously positions spindles, chipbreakers, pad pressures, side guides, feed positioning and feed speed selection. Typical setting time reportedly is 38 seconds for the 19 axis on the machine that was displayed at Ligna.

PHOTO : The Fladder 300/SC from Hansen & Hundebol features a turn table for continuous one-man operation. Up to 20 jigs can be attached to the aluminum module, allowing difficult and odd-shaped pieces to be denibbed by the Fladder.

PHOTO : Silvatech Corp.'s Opti-Rip, displayed at the Mida booth, was developed by a U.S. millwork company to optimize lumber yields in conjunction with its gang ripsaw operation. The system automatically measures the width of each board to calculate the combination of saws which will yield the most valuable rip selection. Instantaneously it projects on the board the optimum rip pattern allowing the operator to rip around defects and maximize yields.

PHOTO : The Cefla ROC Ecosprayer from Stiles Machinery Inc. is an automated flat spray system designed to reduce VOC emissions. Features include a patented coating recovery system, a water filtration system that separates solids for disposal, increased transfer efficiency and an air recirculation system that reduces VOCs and maintains LEL. Feed speeds range up to 10m per minute. The machine can be configured with two, four or eight guns.

PHOTO : Cattinair displayed its new Rotoclean 4, a robotized spray machine that traps overspray on refrigerated, wide steel bands and reuses it. These machines come with either a four-or eight-arm circular carousel. The company says exhaust air for the four-arm model is 99.8% free of particle matter.

PHOTO : Industrias Nicholas introduced an improved version of the Ninfa system for profile sanding, which works without coated abrasives. The new design of the rubber block has double the abrasive area. This also helps double the life of the rubber block.

PHOTO : Friulmac's FN-9, particularly suited for parquet floor manufacturing, can machine up to 120 pieces per minute. Available from Derda Inc., the system features trim and cope saws and has a maximum capacity to handle workpiece 6 in. wide and up to 53 in long. The FN-9 can be put in line with a moulder for automated production.

PHOTO : The Stehle PSM 230 profile copy grinder from Tekmatex features a diamond dressing stone permanently mounted on the grinding table assembly that does not have to be removed during grinding. Distortion-free profiles and direct free relief grinding in either right hand or left hand direction is possible. Planer heads can also be round.

PHOTO : Compwood showed an alternative system to steam lumber bending. Planed lumber is compressed in the longitudinal direction, emerging from the press at about 95% of its original lenght. The cell walls of the compressed wood are folded transversely allowing the wood to be bent in complex shapes including S curves. The wood remains pliable until is dried.
COPYRIGHT 1991 Vance Publishing Corp.
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Copyright 1991, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

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Title Annotation:part 2; Ligna Hannover Fair 1991
Author:Christianson, Rich
Publication:Wood & Wood Products
Date:Aug 1, 1991
Previous Article:Ponderosa pine: the star of the western pines.
Next Article:Technology and education abound at Anaheim Fair.

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