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Diamonds in the rough mill.

DIAMONDS IN THE ROUGH MILL

An essential function of a rough mill, keeping the largest sections of healthy wood intact after detecting and eliminating defects, depends both upon the accuracy of the machinery and the decisions made by the operator.

According to John Foster, marketing manager at Irvington-Moore, the most important considerations in rough milling include: deciding whether to rip-first or cut-first; the length of the material being run and the ability to handle it throughout the system; and the proper disposal of waste, an often overlooked area.

Today's rough mill machinery offers a variety of cutting options, lumber handling capabilities and sanding functions. Computer optimization, in addition, provides more information and helps increase rough mill capabilities.

Available equipment

The following is a list of available rough mill equipment. For more information circle the corresponding number on the Reader's Service Card. Another valuable source of information for equipment, suppliers and services is the 1991 Red Book.

The MR90 multi-rip saw from Diehl Machines cuts to precise tolerances in thicknesses up to 2 1/2 in. With the optional spur feedroll, it cuts multi-rip conveyor-fed stock as short as 5 in. Standard features include: variable feed speeds from 70 to 200 fpm, upper and lower anti-kickback fingers, arbor brake to reduce coasting time, heavy-duty pulley and drive system and throat plate adjustment.

Stiles Machinery offers the TBL 135 abrasive planer from DMC. This machine features: two strong steel structures - the top frame is movable and is supported by the bottom fixed frame by four hydraulic pistons; blowers for abrasive belt cleaning; disk brakes on calibrating roller motors and feeding motor; and an electronic thickness adjusting device.

Cadoret fingerjointers are designed to meet woodworking industry requirements. The company says they offer quick, uncomplicated set-up and maintenance and an exceptional quality of fingerjoint not exceeding .09% waste in recycling.

Oliver Machinery offers the Model 3000 optimizing saw for pre-planed, pre-ripped material. The unit is computer controlled and features a high speed servo drive positioning system. The company says speeds of up to 500 fpm are possible with cut-to-length accuracies as close as 1/64 in. The new system uses the company's IBM industrial based software. Self-diagnostics and a printer to report on shop floor activity are standard with the system.

The 2004 full optimizing cut-off saws from GreCon feature defect cutting, fixed length cutting, longest length optimizing, full optimizing with or without defecting, marking systems and automatic sorting systems. The company also offers the Grecon Superscan, an optical-electronic system to be employed for the four-sided recognition of common defects in wood.

Doucet Machineries Inc.'s chain type clamp carrier features a tubular steel frame, hydraulic clamping and rotation, and an electronic operator for monitoring the tightening, indexing and loosening of the clamps. It also offers a panel flattener, hold-down and front rest.

Mereen-Johnson's #424 DC/SR Select-A-Rip multiple ripsaw features rapid adjustment of one or two adjustable saw blades which can be used independently or in conjunction with a gang sleeve arrangement. The machine offers straight line gang ripping of stock while maintaining optimum yield rates and delivering glue-joint accuracy. The Select-A-Rip includes a control console and overhear laser guide line lights for saw kerf positioning.

Powermatic's semi-automatic cut-off saw is suited for many cut-off operations. The machine features a cast iron table and fence, a heavy steel stand, a 10 hp totally enclosed fan cooled Baldor motor with magnetic control, and has 18 in. blade capacity. The saw can cut stock up to 4 in. by 11 in. or 1 in. by 13 in. with a maximum cycle rate of 90 cycles/minute and is available in right-hand or left-hand models. The saw is available with optional roller infeed tables and roller outfeed tables or ledges.

Linden International Inc. offers the Sandingmaster top and bottom thicknessing sander TBM-1300 for high precision thicknessing of boards and parts. The maximum stock removal is 2mm on both surfaces and both sanders are equipped with steel contact rollers. According to the company, the TBM can also be executed with sanding pad aggregates for fine sanding, or combination aggregates with the possibility of using either the contact roller or the sanding pad or both.

According to Hazledine Machinery the K250 gangsaw automatically adjusts to "butt-fed" material of varying thicknesses and allows quick changeovers without stopping the machine to make a production adjustment. It processes material from 1/2 in. to 2 1/4 in. wide and it will resaw material as short as 10 in.

Mid-Oregon Industries, (MOI) offers the selective optimizer, a computerized control and productivity system for rip-first rough mills. The optimizer enhances the performance of any previously purchased MOI selective or Portland Iron Works Multimatic ripsaw. It installs quickly at the operator station and works in conjunction with the saw's laser guidelines, tally system, and electrical control. The system comes complete with a computer, monitor, keyboard, printer and software. It also features automatic tracking and recording of production volume and waste and operator manual and documentation, plus MOI assistance and on-site training.

The KF-24 multiple blade rip saw from Newman*Whitney is a dip chain feed, glue line, accurate gang rip saw available with a variety of arbor motor sizes from 75 to 125 hp. A selection of feed speeds is available up to 150 fpm. The KF-24 is capable of glue joint rips on lumber to a full 4 in. thick. The KF-24 offers many operational and safety features including anti-kickback assemblies, arbor motor brake and arbor lock.

The Whirlwind model 212 semi-automatic pneumatic cut-off saw is designed to operate 5 to 45 cycles per minute. The company says it is manufactured using the latest tape controlled milling, turning and drilling machines, assuring consistent accuracy and interchangeability of parts. A NEMA magnetic starter is standard with three phase protection in gasketed box.

Mida USA says it Opti-Rip SP.2S computer-monitored double-surface planer profiles the top and bottom of the stock and then gang rips the board. The system includes a lumber measurement bar, computer, monitor, and an array of lasers. The system automatically measures the width of each board and selects the saws which will yield the most valuable rip, according to the company.

The Dual Automated Clamp Carrier from James L. Taylor Manufacturing Co. uses two automated carriages, one above the operator for loosening clamps and one below the operator for flattening panels and tightening clamps. While the operator unloads and reloads the carrier, the DACC automatically and simultaneously loosens clamps, tightens clamps and flattens panels.

Automated Lumber Handling's Model 6536 combination grading system is designed to allow the lumber grader to view the first face at a 45 [degrees] angle and turn the board onto a flat chain to view the other side flat. The grader may then return to the board or release it onto a lugged chain for automatic measuring, ink jet marking or feeding a trimmer.

MR chain feed straight line gang ripsaws from Tyler Machinery are used for straight line, glue-joint quality multiple ripsawing of hardwood and softwood lumber and similar material. The machine incorporates a multi-link cast iron feed chain to carry the lumber in a straight line of travel through the over cutting saw blades. Self-leveling hold-down rollers align the workpiece. The machine is available in three sizes, based on the maximum feed chain width of 10, 14 or 24 in. Saw arbor horsepower ranges from 25 through 150 hp, dependent upon machine sizes and options. Feed rate is adjustable up to a standard maximum of 200 fpm.

Bobcad-Cam offers Bobcad-Autocam which is CAM software for the users of Autocad. With Bobcad-Autocam, users can turn Autocad generated profiles into an N.C. program for milling, lathe, wire-EDM routers and other N.C. equipment. It features over 300 formats including: roughing and pocketing with island avoidance; cutter compensation and tool interference; and full page editing of N.C.

Atlantic Machinery offers the Griggio/ CML heavy-duty dip chain rip saws with trimming (30-hp Model C250 R/T and 50-hp C350 R/T). These become, when needed, edge trimmers by applying a special patented quill with two saw blades. The first blade is "fixed" and acts as an edge trimmer, and the second one is automatically adjusted while the machine is running via an electrical foot pedal. Measurement indicators give precise distance between blades, allowing users freedom to change blade distances without manually changing saw sleeve cartridges.

Alden Machine Co. offers multi-rip gang saw which features a "quick adjust" rip fence which reportedly permits the operator to use the gang rip much like a single-blade ripsaw. Top feed rolls are mounted in indepedently adjustable yokes with square-cut, high-tensile springs providing firm, constant pressure during stock travel.

Northfield Foundry & Machine Co.'s Automatic Tailboy replaces the helper in connection with a chain-feed, straight-line ripsaw. The machine grips the lumber between an upper and lower belt as it comes out of the ripsaw. After it is completely out, the belts stop, shift sideways with the board, then reverse and return the board across the ripsaw table to a position next to the ripsaw operator.

Available in 37 and 52 in. widths, Timesavers says this machine was designed for planing and sanding of 0 to 6 in. thick glued-up lumber, banded particleboard and core stock for the furniture, millwork and cabinet industries. Features include electronic abrasive belt tracking, low noise planing head, easy cutter head maintenance and automatic abrasive belt tensioning.

Buss Automation's Accu-rip system is a computer controlled, optimizing gang rip system. Its standard features include: suggesting the size of the package to be processed based on cutting bill requirements, displaying overall board footage, usable board footage and net rips and determining when a part requirement is complete and dropping that item from the cutting bill. The company says a full help utility is incorporated into the software to aid the operator with the daily task of running the system.

According to Yates America the B-15 double rough surfacer is suited for mills straight planing from 5,000-25,000 board feet per shift (4/4) basis or for mills where the surfacer is tied directly in line with a single selective gang rip saw. The company says the B-15 "posi-tensioning" feed system assures a continuous flow of material through the line. Other features include: fabricated and stress relieved steel frames, heavy-duty hydraulic feed system and carbide spiral cutterheads.

Cemco Inc.'s planer-sander Model 6352 Upper allows more stock removal with less than half the horsepower of typical abrasive planers, the company says. The unit features a Newman*Whitney Quietcut helical planer head so that the machine can be used on cross grain as well as hard applications.

Industrial Woodworking Machinery offers the new Industrial SAF-3820 Series semi-automatic fingerjoint feeder. An ultrawide feed drive brush provides accurate alignment and positive feed for both shortblock and standard length material. The variable speed electric drive is precisely controlled by an adjustable electronic controller. This feeder operates as an infeed device and a similar fully automatic unit is available for transfer to assembly. It is retrofitted to most existing Industrial fingerjoint shapers of the FJS, IWS, SSS and 3470 series.

Irvington-Moore says its inspection system's turning arm enables the system to handle pieces more quickly and lets an inspector grade each piece more accurately. The multi-turn capability allows a recheck of each face without manual turning or having to shut down the system. The company adds that using a positive feed, the station increases speed and efficiency by 20 to 30 percent over conventional systems.

Ellington Manufacturing Inc. offers the Baker band resaw which can be used for resawing, ripping, sizing, beveled cuts and diagonal cuts. According to the company, it will accept any length. The standard model will cut up to a 6 in. by 12 in. or 8 in. by 8 in., while the extra-wide model will accept up to a 12 in. by 12 in. or 16 in. on thinner pieces. Baker band resaws are available in several models from one headrig to six with standard or extra-wide cutting capacities. The headrigs can also be arranged in-line or bi-directional, depending on the need.

Silvatech Corp. offers the Opti-Rip saw optimizer for all makes and models of fixed arbor gang rip saws, the company says. When the unit is used with a present feeding routine, Opti-Rip is said to automatically measure the width of each board to calculate the combination of saws which will yield the most valuable rip selection. Opti-Rip projects on the board the complete optimum rip pattern allowing the operator to rip around defects with laser line accuracy. Savings can be realized in two ways, according to the company: selective ripping of lower grade lumber reduces lumber costs by 40%; and yield improvements are typically 5 to 15%.

Fortis Machinery Corp. says its resaw is almost totally built of heavy cast iron for heavy-duty work, yet works with throw-away 2-in. and 2,5-in. blades, eliminating the need for resharpening. This also ensures a narrow kerf, the company says. The saw comes standard with a heavy, enlarged Carter guide and 10 hp motor. A 15 hp motor is optional.

The Rough Mill Command Center from Barr-Mullin joins the Compu-Rip with a remote PC and printer. This allows the supervisor to track production statistics and simulate different gang rip arbor setups from the convenience of the office.

PHOTO : Irvington-Moore's inspection station has a multi-turn capability.

PHOTO : Oliver Machinery's Model 3000 optimizing saw cuts downward to reduce tear out.

PHOTO : Silvatech Corp.'s Opti-Rip calculates the most efficient rip selection.

PHOTO : Mid-Oregon Industries' selective optimizer automatically tracks production volume.

PHOTO : The Whirlwind Model 212 cut-off saw operates up to 45 cycles per minute.

PHOTO : Mereen-Johnson says its #424 DC/SR Select-A-Rip multiple rip saw offers straight line gang ripping of stock while maintaining optimum yield rates and delivering glue-joint accuracy.

PHOTO : Stiles Machinery offers the TBL 135 abrasive planer from DMC, which features blowers for abrasive belt cleaning and an electronic thicknessing device.
COPYRIGHT 1991 Vance Publishing Corp.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 1991, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

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Title Annotation:rough mill equipment
Publication:Wood & Wood Products
Date:Jun 1, 1991
Words:2331
Previous Article:Veneer use grows: as raw materials shrink.
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