FI81040B - Arrangement for cutting surfacing panels, especially plasterboard panels - Google Patents

Description

t j 81040

The present invention relates to a device for cutting cladding boards, in particular gypsum boards, comprising having a circumferential spacing less than the thickness of the plate to be cut, and wherein the blade shafts are located on different sides of the plate so that the pair of blade discs in each case intersects the top and bottom surfaces of the plate.

15

It is known to use circular sawing machines with feeding tables for cutting gypsum boards and the like. Disadvantages of such sawing machines include the relatively expensive cost of the equipment, the amount of dust caused and the poor cutting pattern in the case of gypsum boards.

A cutting device of the type mentioned in the introduction is disclosed in the application publication GB-2 128 531. The device described in the publication is intended especially for cutting corrugated boards, but the type of device could also be used, for example, for cutting gypsum boards. The cutting blades are adjustable on the machine.

SE-440761 again discloses a cutting device specifically for a gypsum board 30, which also has rotary cutting blades cutting on opposite sides of the board. In this device, however, the plate itself is held in place, and the entire frame structure of the cutting blades is arranged to be linearly movable.

When cutting gypsum boards, it is of course important that, on the other hand, the distance between the blade discs or axes can be adjusted exactly to the correct thickness of the board and that, for example, when making several cuts at the same time, the cutting depth is the same. As this is an axis extending over the entire width of the plate, this requirement requires a very sturdy and heavy structure. According to the present invention, the problem is thus avoided, and the invention is characterized in that support rollers are arranged in contact with the blade shaft, which can in each case be moved in the vicinity of the blade disc to prevent the blade shaft from bending.

10

For example, there may be two support rollers supporting the blade shaft at different angles for each blade disc.

The invention and its other features and advantages are described in more detail below in the form of an example and with reference to the accompanying drawings, in which Figure 1 shows a side view of a device according to the invention and Figure 2 shows the same device in an end view.

20

In the drawings, reference numeral 1 denotes a body of the device comprising two H-shaped ends and cross-beams between them. Extending on at least one side of the body extends a feeding table 2 from which the plate to be cut is fed through a cutting device to be described below. The feed table has a side guide 3 against which the feed side of the plate to be cut is placed.

The device shown in the drawings has two pairs of rubber-rolled rollers, namely rollers 4, 5 and 6, 7, which convey the plate through the cutting device. The feed rollers are driven by an electric motor 21 via its traction sheave 10 and belts 8, 9.

35 The side beams 12 of the frame are mounted on cylinders with vertically displaceable carriages 13, 14, to which in turn is attached a unit 15 containing the cutting members themselves. The cutting members are formed in each case by two parallel

II

3,81040 of opposed blade discs 18, 19 mounted on its shaft 16, 17.

The blade discs are preferably freely rotatable and preferably have a blade angle of at most 15 degrees, preferably less than 10 degrees. The shafts 16, 17 are preferably supported by intermediate supports 20, which may consist, for example, of two support rollers 20 resting on the shaft in each case.

The blade discs 18, 19 can be adjusted on the shafts and likewise the support rollers 20 can be moved steplessly along the slide guides and locked in the desired position. In the case shown in the drawing, there are two pairs of blade shafts so that different pairs can use different layouts. The selection of the shaft pair 15 is, of course, performed by the vertical displacement of the unit 15. By fine-tuning the unit 15, the blade shafts can also be set in the correct position, for example when the thickness of the plates to be cut varies.

Claims (5)

Apparatus for cutting cladding boards, in particular gypsum board boards, comprising a feeding table (2) with feeding rolls (4, 5, 6, 7) and cutting bites (18, 19) located on the transport path of the plate, which comprise two, with the feeding rolls (4, 5, 6, 7) parallel bait shafts (16, 17) along the shaft adjustable mounted batten plates (18, 19), the distance between the peripheries being less than the thickness of the sheet to be cut and wherein the bait shafts (16, 17) are located on different sides of the board such that a bite-pine-rich pair of blades intersects the top and bottom surfaces of the board, characterized in that, in contact with the bait shaft (16, 17), the support is adapted. rollers (20) which are slidable in the vicinity of the bite plate to prevent bending of the bait shaft (16, 17). Device according to claim 1, characterized in that for each bet plate (18, 19) there are two support rollers (20) which support the bet shaft (16, 17) from different angles. 3. Device according to claim 2, characterized in that the support rollers (20) are adapted to the guide running in the direction of the shaft. 25 Device according to claim 1, characterized in that the bait shafts (16, 17) are adapted in a unit (15) which is movable in relation to the feed plane. Device according to claim 4, characterized in that two bait shaft pairs (16, 17) are arranged in the unit, where the settings of the bait plates (18, 19) are different.