Device for orienting wood particles

 

(57) Abstract:

Usage: the invention relates to woodworking industry, in particular the production of chipboard. The inventive device includes mounted on the spring guide bars, a motor, a crank mechanism, a lever with a variable ratio shoulders, electromagnet, sensor element, the amplitude detector, a smoothing filter and a power amplifier. The new device is to supply its amplitude selector, a pulse shaper, a subtraction unit transistor and the key, and the inputs of the amplitude selector and pulse shaper connected to the output of the amplitude detector, and outputs to the inputs of the subtraction unit, the output of which through the transistor switch is connected to the engine. 2 Il.

The invention relates to woodworking industry, in particular the production of chipboard.

The purpose of the invention is improving the quality orientation of the wood particles.

In Fig. 1 presents a diagram of the device for orientation of wood particles; Fig. 2 - characterization of the mechanical vibrations generated by the proposed device (f2">

Device for orienting wood particles includes orienting the grating 1, mounted on the springs 2 and connected to the lever arm 3, with the other shoulder of which is connected the connecting rod (lever) 4 connected with the crank 5 which is placed on the shaft of the actuator 6, made in the form of a DC motor. The lever 3 is made with a variable ratio shoulders and contains a groove 7, which is fixed to the shoulder of the rocker arm 8. The other shoulder of the rocker arm 8 is connected with a return spring 9 and the rod of the electromagnet 10. The device comprises also installed in the stream of wood particles sensitive element 11, the amplitude detector 12, a smoothing filter 13, a power amplifier 14, the output of which is connected to the winding of the electromagnet 10, the amplitude selector 15, made in the form of a Schmidt trigger with dead zone, the shaper 16 pulses are identical and different size of the dead zone and the presence of a phase-shifting block, block 17 subtraction and transistor switch 18, the output of which is connected to the control input of the actuator 6.

The device operates as follows.

The motor 6 rotates the crank 5, the levers 4 and 3 vibrational motion with high frequency fn= 2-10 Hz, proportional to the number of large particles, and with an amplitude proportional to the size of the large particles per unit area of stream.

Output amplitudnaya. The amplitude selector 15 passes only pulses of high amplitude from large particles flow and forms one rectangular pulses, and the shaper 16 pulses passes the pulses of all of the amplitudes of all of the particles of the stream, which generate a signal in the sensing element 11, and forms one rectangular pulses. In block 17 subtracting these signals are subtracted, and the output of block 17 appear rectangular pulses with a frequency proportional to the number of small particles per unit area of stream. These pulses control transistor key 18, the average voltage to the actuator 6 is changed, its speed and high frequency oscillations orienting grid 1 finalso change in proportion to the number of small particles per unit area of stream within 20-50 Hz, which corresponds to the frequency of rotation of the drive shaft 6 1200-3000 rpm high-Frequency lattice vibrations throw 1 small wood particles, and low - larger particles, there is a complete orientation of all wood particles flow. (56) USSR Author's certificate N 1595642, class B 27 N 3/14, 1988.

DEVICE FOR ORIENTING WOOD PARTICLES containing orienting the grate installed on PR is Ino United sensitive element, amplitude detector, a smoothing filter and the power amplifier, the output of which is connected to the winding of the electromagnet, and the stem of the latter pivotally connected with one arm of the rocker arm provided with a return spring, the other arm of which is in communication with the lever with the possibility of changing the ratio of his shoulders, characterized in that, with the aim of improving the quality orientation of wood particles, it is provided with amplitude selector, a pulse shaper, a subtraction unit transistor and the key, and the inputs of the amplitude selector and pulse shaper connected to the output of the amplitude detector, and outputs to the inputs of the subtraction unit, the output of which through transistor switch connected with the control input of the actuator.

 

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