SU1253807A1 - Chip preparation line in particle-board production - Google Patents

Description

The invention relates to the preparation line for the production of chipboard and can be used in the woodworking industry.

The purpose of the invention is to improve line productivity by adjusting the drying mode and improving the quality of its sorting.

FIG. I shows the circuit of the preparation of chips; FIG. 2 shows a separator, a general view ;, FIG. 3, a section A — A in FIG. .

The line includes a vertical core for chips, in the lower part of which a chute 2 with a vibrator is provided, providing dosing delivery of chips to the conveyor 3, then to the chip machine 4. From the chip machines 4, the chip through the lock gate 5 enters the drum dryers 6,

The dry flow from the sugillary dcipa-ban 6 enters the sieve separator 7 for rtsev round and small particles, after which the pneumatic separator is fed through a cyclone; into the horizontal bunker 8 dry chips. After grinding in a hammer crusher 9, large particles are returned to the sieve separator 7 or fed to the n: hopper 8.

The separator includes a housing 10, a cylindrical grid 115 loading hatch 12, a discharge hatch 3 of a small fractionJ a large fraction discharge hatch 14, a rotor 15 with a drive 16 and blades 17, mounted Ø with adjustable rotation relative to the longitudinal axis of the rotor .. Guides 8 are spiral-shaped installed between the grid 11 and the rotor 15 convex surface in the direction of the grid so that it forms between them gaps 19.

Lini works in the following way.

Vibration chimney 2 accumulated in the bunker 1 is metered into the chip machine 4 where the chips are minced to the plant /: zhu "Since the resulting chip leaks the sixth humidity, then after chip machine 4 it ifiocT: sntiaeT through a sluice gate 5) the drum of the dryer 6, where it is dried to a certain humidity,

Dried chips from the e-drum are sorted.

072

on the sieve separator 7, into which the wood particles for separation are fed to the charging port 12, the rotor 15 is rotated by means of

water i 6 s

The blades 17 of the rotor 15 pick up the falling wood particles and, together with the air flow, feed them into the gaps 19 between the guides 18.

At the same time, the blades 17 are turned at a certain angle at which the mixture of chips and air moves along a helical line in the cavity between the cylindrical grid II and the guides 18,

The turbulent motion of the wood particles, the centrifugal forces and the air pressure force the fine particles along with the air to pass through the openings of the grid 1, that is, to sort out.

The turbulent movement of particles and air pressure dramatically increases the sorting performance. In this case, the air supplied by the blades 17, which are in contact with the particles only at the beginning of the 1st period. Thus, the degree of grinding of the particles from mechanical mixing by the blades 17, which has a positive effect

on the strength of the boards made from wood particles.

Large tree particles that did not pass through the aperture of the cylindrical grid 1 1 i, along a helical trajectory, fall into the hatch 14 of the large fraction. Small wood particles, more than a CEI hole in the cylindrical grid 11, together with the air fall on the slope of the housing 10 into the discharge hatch of the small fraction 3.

Sorted wood particles enter the process stream.

The invention provides an increase in line productivity due to the operation of a cylindrical grid over the entire surface, i.e. increasing the working area of the sorting grid at least twice, and the sorting performance increases, and therefore9 and the entire line as a whole.

The quality of wood sorting increases due to turbulence and forced air blowing of wood particles. At the same time, almost all small particles are sifted through the holes. No grinding of wood particles

3

in the process of sorting, since the rotating blades do not participate in the direct movement of the material, but rather in the case of this operation through forced air. Air due to its properties when moving does not crush wood particles.

The crushing of wood particles by blades, for example, in paddle mixers, reaches 15-30% of the initial fractions, therefore, orientally, a reduction in the crushing of particles in this sort by 5-ЗП should be considered, which indicates a high quality of sorting.

Tfig 2

13

Aa

12

Editor M, Tovtin

Compiled H, Drozdova

Tehred L. Serdyukov and Proofreader, Kolb

Order 4671/19 Circulation 501 Subscription

VNISh State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab ,, d, 4/5

Production and printing company, Uzhgorod, st. Project, 4

FIG. 3

Claims (1)

CHAIN PREPARATION LINE IN THE PRODUCTION OF WOOD-BINDING ^! A HOB including a chip bin * a chip machine, drum dryers, a separator in the form of a cylindrical body with loading and unloading hatches, inside which a ventilation rotor and a cylindrical mesh are installed, ensuring that the separator is supplied with guides in the form of convex plates in the mode which are located between the rotor and the cylindrical mesh, and the edges of the plates ig are installed with a gap and overlap one another. For the purpose of drying the tea line, increase it by cutting, chipboard. - M.: Higher 1977, p. 59-60. * 4> phage 1 SI 1 253807