RU2804105C1 - Device for grinding thermally modified wood - Google Patents

Abstract

FIELD: wood grinding.

SUBSTANCE: device for grinding thermally modified wood consists of a cutting working body driven by a gearbox connected to a motor by means of a belt drive. The cutting working body of the device is a disk cutting blade rotating in a horizontal plane, the cutting edge of which is made in the form of a spiral. For feed and stop when cutting raw materials, rectangular holes are used, located on a fixed plate that fits snugly against the cutting disc. Guides are installed on the plate to support and supply wood raw materials in a given direction, corresponding to the size and shape of the holes.

EFFECT: obtaining chips of the required size and shape from thermally modified wood.

1 cl, 2 dwg

Description

The invention relates to devices for grinding both thermally modified and natural wood, and for the purpose of obtaining chips of specified shapes and sizes for subsequent use as coarse aggregate for thermal wood concrete, decorative chips and in other possible areas of use.

There is a known design of a drum chipper for chopping wood into chips [1], consisting of the main working body of the drum, equipped with removable knives and performing transverse cutting of round timber, lumber and lump waste by feeding them perpendicular to the axis of rotation of the drum.

When the size of the crushed raw material is small, disc chippers are widely used [2], the working body of which is a disk, the side surface of which is also equipped with flat knives, and cutting is carried out at a slight angle to the axis of rotation by self-tightening and the action of the raw material’s own gravity.

A common disadvantage of these devices is that when grinding thermally modified wood raw materials, it is destroyed into small particles and into a dispersion mass due to the greater fragility of the TMD and the high speed of movement (rotation) of the knives. Therefore, it is difficult to obtain thermally modified wood chips of standard or required sizes and shapes.

The most suitable design for obtaining crushed thermally modified wood of the required sizes and shapes is the design of auger-type shredders [3], where power cutting occurs with a relatively low rotation speed of the pointed outer edge of the auger turn with increasing height or when using an auger with a constant diameter but feed raw materials at an angle to the axis of its rotation.

This type of device is taken as a prototype.

The disadvantage of this design is that it is impossible to change the size of the resulting chips, which in turn depends on the pitch of the screw turn. Changing the length (size) of the chips is possible by installing another auger with a different pitch of the turn.

The technical result is to obtain chips of the required size and shape from thermally modified wood.

The technical result is achieved by the fact that the cutting working element of the device is a disk cutting blade rotating in a horizontal plane, the cutting edge of which is made in the form of a spiral. For feeding and stopping when cutting raw materials, rectangular holes are used, located on a stationary plate, the blade adjacent to the cutting disk, on which guides are installed to support and feed wood raw materials in a given direction corresponding to the size and shape of the holes.

The design of a device for grinding thermally modified wood is shown in Fig. 1 – top view and Fig. 2 – side view.

The device consists of a disk cutting blade 1 with a cutting edge 2 in the form of a spiral, driven by a gearbox 3 and a motor 4 using a belt drive 5, mounted on a frame 6, the upper part of which has a fixed plate 7 with holes 8 and guides 9 for support and supply of wood raw materials 10; stop 11 for regulating the supply of wood raw materials 10 and height adjusting bushings 12, as well as blades 13 for pushing wood chips out of the device.

The device works as follows. Thermally modified raw materials 10 in the form of lumber or lump waste are loaded into the guides 9. Thanks to their vertical installation or installation at the required angle relative to the horizontal, the raw materials 10 are supplied to the working body 1 under the influence of gravity. During the rotation of the disk cutting blade 1 with a spiral cutting edge 2, power cutting of thermowood raw materials 10 occurs in the direction from the center of rotation to the outer circumference of the cutting blade 1. The raw material spontaneously feeds (falls) under its own weight when the cutting disk 1 rotates and reaches the moment when its missing part (segment) due to its spiral shape will be directly under the feed hole 8. The length of the resulting chips (feed amount) is adjusted by setting the post-knife stop 11 to the required specified distance relative to the cutting blade 1. To reduce rotation speed and ensure power cutting of thermally modified wood raw materials, a gearbox 3 is used, driven (rotating) by a motor 4 via a belt drive 5.

Bibliography

1. Patent SU 1736697 A1 USSR, IPC B27L 11/02 (2006.01). Drum chipper: No. 4734352: application. 07/04/1989: published 05/30/1992 / Magdeev D.M., Manuilov N.A., Trubetskoy P.A.; applicant Central Research and Design Institute of Mechanization and Energy of the Forestry Industry. — 4 p.: ill. — Text: direct.

2. Patent SU 1794658 A1 USSR, IPC B27L 11/02 (2006.01). Disc chipper: No. 4887565: appl. 05/12/1990: published 02/15/1993 / Gomonay M.V.; applicant Cooperative Center for Scientific and Technical Services of the Forestry Industry. — 6 p.: ill. — Text: direct.

3. Patent SU 1782744 A1 USSR, IPC B27L 11/02 (2006.01). Chipper: No. 4751787: app. 07/11/1989: published 12/23/1992 / Skrypnik V.N., Arshanitsa V.S., Shneer Z.V., Zhuravlev I.A.; applicant: Project Design and Technology Bureau of the Stars Research and Production Association. — 5 p.: ill. — Text: direct.

Claims (1)

A device for grinding thermally modified wood, consisting of a cutting working element driven by a gearbox connected to a motor via a belt drive, characterized in that the cutting working element of the device is a disk cutting blade rotating in a horizontal plane, the cutting edge of which is made in the form of a spiral, To feed and stop when cutting raw materials, rectangular holes are used, located on a stationary plate that fits tightly to the cutting disk, on which guides are installed to support and feed wood raw materials in a given direction, corresponding to the size and shape of the holes.