Woodworking – Planer
Patent
1998-04-17
1999-11-09
Bray, W. Donald
Woodworking
Planer
30476, 83672, 144115, 1441171, 144218, 144221, 407 12, 407 63, 409110, 409124, B27C 100
Patent
active
059795204
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The inventions relates to an apparatus for smoothing continuous panels or strips, in particular gypsum-fiber panels and the like. More particularly this invention concerns a system for smoothing panels as they are produced continuously and to a portable hand tool used for smoothing elongated workpieces.
BACKGROUND OF THE INVENTION
European 0,465,654 describes an apparatus for leveling concrete floors or the like. A rail-mounted carriage carries a horizontal and rotationally driven auger. During translatory movement of the carriage in a direction perpendicular to the axis of the auger, the rotating auger smooths unhardened concrete.
An apparatus described in U.S. Pat. No. 4,298,555 works similarly. This apparatus serves for smoothing the inner surfaces of conical concrete floors of tanks or the like. An auger rotationally driven about its axis is movable in a frame which moves around the axis of the cone, inclined at the cone's apex angle, so that, as it orbits the frame, the entire inner surface of the cone is rotationally passed over to smooth the still plastic concrete.
OBJECT OF THE INVENTION
It is an object of the invention to provide an apparatus of the type described wherein clogging of the tool is avoided, wear is minimized, and little dust is generated; in addition it is an object of the invention to provide a portable hand tool for smoothing strips. It is also within the scope of the objects to integrate the apparatus so into a production line for gypsum-fiber panels that it works wholly without generating dust.
BRIEF DESCRIPTION OF THE DRAWING
The drawing serves for explaining the invention with reference to simplified and schematically illustrated embodiments. Therein
FIG. 1 is a side view of an apparatus according to the invention;
FIG. 2 is a top view of the apparatus according to FIG. 1;
FIG. 3 is a side view of another apparatus according to the invention;
FIG. 4 is a top view of the apparatus according to FIG. 3;
FIG. 5 shows a detail;
FIG. 6 shows a detail for an alternative embodiment;
FIG. 7 shows a portion of the upper surface of a panel being machined;
FIG. 8 is a side view of a portable tool;
FIG. 9 is a top view of the portable tool;
FIG. 10 shows a detail of a preferred embodiment; and
FIG. 11 shows like FIG. 10 a detail of another embodiment.
SPECFIC DESCRIPTION
As shown in FIG. 1 an endless conveyor belt 1 is spanned over rollers 2 and 3 which are journaled in a stationary machine frame 4. One of the two rollers 2 and 3 is driven. Below the upper stretch of the belt 1 is a support formed by a stable rigid plate 5. On each side of the machine frame 4 is a respective bearing housing 6 for an auger 7 that extends above the upper stretch of the belt 1 over its entire width, here for example 0.65 m. The bearings of the auger 7 are vertically displaceably adjustable in the bearing housing 6 so that the spacing between the belt 1 and the auger 7 can be set exactly. The auger 7 has a right-handed screwthread 8 that is shown in more detail in FIG. 5. The outside screwthread edge 9 lies on an imaginary cylinder coaxial with the auger and forms with the two screwthread flanks 10 and 11 angles of 90.degree.. The auger 7 is connected to a drive 12. Parallel to and flanking the auger 7 upstream and downstream are hold-down rollers 13. The machine frame 4 is provided on both sides with guide elements 14 for continuous panels 15.
The apparatus is preferably integrated into a continuous production line for gypsum-fiber panels. In a system, which includes devices for making rough panels, a binding station, and a dryer following the binding station, they can, as with belt-sanding machines, be downstream of the dryer. The dried panels 15 which have been cut by a saw to standard 2.5 m format run through the apparatus in the direction of arrow 16 one immediately after the other. The hold-down rollers 13 prevent the panels 15 from slipping on the conveyor 1. The bearings of the auger 7 are vertically adjustable such that the spacing between the conveyor belt 1 and the
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Babcock-Bsh GmbH
Bray W. Donald
Dubno Herbert
Wilford Andrew
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