JPS6328674B2 - - Google Patents

Description

[Detailed description of the invention] Industrial applications The present invention relates to improvements in color sorting devices.

Prior Art This type of color sorting device detects the amount of light obtained by projecting light onto falling particles using a light receiving element, communicates the output to a control circuit to operate a spray nozzle, and produces a jet of air. This system is equipped with a photoelectric separation chamber that separates different-color particles by using a method. In order to increase the amount of particles to be sorted as much as possible, by increasing the flow rate of particles in the downflow gutter, the flux of the falling trajectory expands, and the uniform particles near the unique particles are grouped together by the jet action during sorting. Injected. In order to deal with this, if the flux of the flow trajectory is made to flow one particle at a time, the amount of sorting will decrease, so it is unavoidable to increase the amount of sorting, and remove the different color particles mixed with regular particles. Re-selection is the norm.

Problems to be Solved by the Invention In view of the above points, the present invention has a primary sorting section and a secondary sorting section.
By efficiently and cyclically communicating with the next sorting section, the flow rate of particles in the photoelectric sorting chamber can be increased as much as possible, and particles mixed with different colors can be circulated several times. The purpose of the present invention is to develop and provide a high-performance color sorting device that effectively sorts particles and thereby achieves mass production of carefully selected, high-quality regular particles reliably, smoothly, and quickly.

Means for Solving the Problems The present invention detects the amount of light obtained by projecting light onto falling particles using a light receiving element, communicates the output to a control circuit to operate an injection nozzle, and generates a jet of air. In a sorting device in which a plurality of photoelectric sorting chambers for separating different color particles by action are arranged side by side in a machine frame, the plurality of photoelectric sorting chambers are combined into a primary sorting section consisting of an arbitrary number of particles, and two
A secondary sorting section is divided into a different color particle discharge port of each photoelectric sorting chamber provided in the primary sorting section, and a supply port of a secondary granulator connected to the supply section of the secondary sorting section. At the same time, the granulation tube for grading in each photoelectric sorting room provided in the secondary sorting section is connected to the supply port of the primary granulator which connects to the supply section of the primary sorter. , a particle amount detector is provided in the supply section of the secondary sorting section, and the particle amount detector and the supply amount adjustment device provided in the supply section of the primary sorting section are connected via a control circuit, The above problem was solved by configuring the apparatus to control the supply amount of the primary sorting section according to the amount of particles in the supply section of the sorting section.

Function The particles supplied to the supply section of the primary sorting section by the primary granulator are sorted in the primary sorting section, and the particle group containing different colored particles separated by the injection nozzle is sent to the primary sorting section. The colored particles are guided to the discharge port, sent to the supply section of the secondary granulator, and supplied to the supply port of the secondary sorting section by the secondary granulator, where the different colored particles are sorted out. Ru. The sorted particles sorted in the secondary sorting section are then supplied again to the primary sorting section by the primary granulator and are color sorted. The amount of particles supplied to the primary sorting section is controlled according to the amount of particles in the supply section of the secondary sorting section, so that the particles flow through each sorting process in just the right amount.

Example An embodiment of the present invention will be described with reference to the accompanying drawings.

Figures 1 to 3 show a sloping shape in which a supply section 3 or 3A consisting of a storage tank 1 or 1A and a vibrating conveyance trough 2 or 2A is provided in the upper part, and a downflow trough 4, a photoelectric sorting chamber 5, etc. are housed inside. A plurality of gutter tubes 6 for sorting are provided, and a plurality of gutter tubes 6 are arranged in parallel in the box-shaped machine frame 7, and a plurality of photoelectric sorting chambers 5 are connected to an arbitrary number of primary sorting sections A and secondary sorting sections. A spray nozzle 8 is provided in the photoelectric sorting chamber 5, and the nozzle 8 is connected to a light receiving element 11 provided in a photoelectric device 10 via a control circuit 9.
The light receiving element 11 detects the amount of light obtained by emitting light from the light source 12 onto the particles flowing down from the source, and the output is communicated to the control circuit 9 to operate the blow nozzle 8. 14 is a particle collecting cylinder, 14 is a different color particle discharge port, and 15 is a vibrating device for a vibrating conveyance gutter. The unique particle discharge port 14 of each photoelectric sorting chamber 5 provided in the primary sorting section A and the secondary granulator 16 connected to the supply section 3 of the secondary sorting section B
The feed port section 17 of is connected by a transverse conveyor 18, and the granulation collection cylinder 13 for particle size adjustment of each photoelectric sorting chamber 5 provided in the secondary sorting section B is connected to the particle collecting tube 13 for particle size adjustment of each photoelectric sorting chamber 5 provided in the secondary sorting section B.
The supply port 17A of the primary granule lifter 19, which is connected to the supply section 3, is connected by a transverse conveyor 20.

The discharge port portions 21 and 21A of the primary granule lifter 19 and the secondary granule lifter 16 are connected to the 1
Each supply section 3 of the secondary sorting section A and the secondary sorting section B,
3A are connected to side wall openings 22 and 22A of storage tanks 1 and 1A, respectively. In addition, a particle amount detector 2 is provided in the supply section 3A of the secondary sorting section B.
3 is provided, and the particle amount detector 23 and the supply amount adjustment device 2 provided in the supply section 3 of the primary sorting section
4 is connected via a control circuit 9, and each detection signal of a particle amount upper limit sensor 23A and a particle amount lower limit sensor 23B of a particle amount detector 23 provided on the side wall of the storage tank 1A of the secondary sorting section B is connected. Accordingly, the vibrating device 15 of the vibrating conveying gutter 2 provided in the supply section 3 of the primary sorting section A is controlled to be turned on and off.

Further, the supply amount adjusting device 24 is provided with an upper limit sensor 24A, and the upper limit sensor 24A is connected to an alarm 25 via a control circuit 9.

The storage tank 1A provided in the supply section 3A of the secondary sorting section B is provided with an overflow window 26 on its side wall,
A return reserve tank 27 for collecting particles overflowing from the overflow window 26 is connected to the overflow window 26, and excess particles in the storage tank 1A of the secondary sorting section B are discharged through the discharge port 28.
The granules flow down to the supply port 17 of the secondary granulator 16 and are returned.

In addition, each of the transverse conveyance machines 18 and 20 is disposed in a space 30 isolated from the machine frame surface inside the support leg 29 that supports the bottom of the machine frame 7, and vibrations generated in the conveyance machine are directly affected. It is configured so that it is not transmitted to each device inside the aircraft frame.

With the above-mentioned configuration, when the raw material mixed with different color particles is supplied to the storage tank 1 provided in the supply section 3 of the primary sorting section A through the primary granulator 19 and the device is started, the storage tank 1 is activated. The mixed particles flowing down from the tank 1 to the vibrating conveyance gutter 2 flow down from the gutter end of the conveying gutter 2 to the downflow gutter 4 due to the vibration action of the vibrating device 15, and each particle sliding in the gutter flows into the photoelectric separation chamber 5. flows down in flight along a predetermined flow trajectory X. In the photoelectric sorting chamber 5, a light receiving element 11 emits light from a light source 12 onto each of the particles flowing down.
The output is communicated to the control circuit 9 to operate the injection nozzle 8, and due to the jet action, the different-colored particles depart from the falling trajectory X and are discharged from the different-colored particle outlet 14 to the side. The sorted particles are flowed down to the feeding conveyor 18 and placed thereon, and the sorted particles are taken out of the machine via the particle sorting tube 13 and sent to the next step. This primary sorting action increases the flow rate of particles in the downflow gutter 4 due to the need for mass production, so the flux of the downflow trajectory The particles are ejected from the outlet 14 with some regular particles mixed in with the different color particles.

The particles loaded on the cross-feeding conveyor 18 in this way are fed crosswise and flow into the supply port 17 of the secondary granule lifter 16, and are also
Storage tank 1A of supply section 3A provided in next sorting section B
The particles in the storage tank 1A flow down from the downflow gutter 4 into the photoelectric sorting chamber 5 via the vibrating conveyance gutter 2A, and the mixed different colored particles are sorted out in the same manner as the above-mentioned sorting action. Unique particle outlet 14
The sorted granules are discharged from the machine to the outside of the machine, and the sorted granules flow down to the lateral transport conveyor 20 via the granule collector cylinder 13 for grading, are loaded on top of them, and are conveyed to the primary granulator 1.
9 and is returned to the supply section 3 of the primary sorting section A.
The above-mentioned sorting process is repeated to perform the highly accurate sorting operation again.

Then, each discharge port portion 21, 21A of the primary granule lifter 19 and the secondary granule lifter 16 is connected to the
Each supply section 3 of the secondary sorting section A and the secondary sorting section B,
Since it is connected to the side wall openings 22 and 22A of the storage tanks 1 and 1A provided in the storage tanks 1 and 3A, respectively, particles can be distributed over the entire surface of the tank, compared to a conventional device in which the tanks are suspended below the discharge port of the granulator. Flows out in a dispersed manner laterally through the openings in the side walls and accumulates at the same height within the tank, increasing the storage capacity of the tank and lowering its machine height, making it possible to downsize the entire device. There is.

Further, a particle amount upper limit sensor 23A of the particle amount detector 23 provided in the supply section 3A of the secondary sorting section B
The vibration device 15 of the vibrating conveying gutter 2 provided in the supply section 3 of the primary sorting section A is controlled ON and OFF by each detection signal of the particle amount lower limit sensor 23B, so that the particle flow rate flowing through the sorting process is controlled to be ON and OFF. It is stable with no excess or deficiency, and has the effect of ensuring that efficient sorting action can be continued at all times.

Further, a particle amount upper limit sensor 24 in the supply amount adjusting device 24 provided in the supply section 3 of the primary sorting section A
A is connected to the alarm 25 via the control circuit 9, so when the raw material supplied to the supply section (storage tank) of the primary sorting section reaches the particle amount upper limit sensor 24A position, an alarm is issued. This has the effect of immediately stopping the supply operation and continuing only the sorting operation, completely preventing an accident from overflowing with excess particles.

In addition, particles overflowing from the overflow window 26 of the storage tank 1A provided in the supply section 3A of the secondary sorting section B are stored in the secondary sorting section B via the return reserve tank 27 and the secondary granulator 16. Since the particles are returned to tank 1A, accidents such as overflow of excess particles from the storage tank of the secondary sorting section can be completely prevented, and the secondary sorting operation can be safely continued at all times without interruption of particle flow. .

Furthermore, each of the transverse conveyors 18 and 20 is installed in a space 30 that is isolated from the machine frame surface inside the support legs 29 that support the bottom of the machine frame 7, so that the vibrations generated by the conveyors are directly transmitted to the machine frame. Since the information is not transmitted to each device within the system, there is an effect that the accuracy of the sorting action can always be maintained well and stably.

The color sorting device of the present invention is used for color sorting grain shells mixed with different color particles, synthetic resin pellets, glass granules, tablets, and the like. Further, the lateral transport conveyor means a scraper, a screw conveyor, a belt conveyor, a vibrating conveyor, or the like. Particle amount lower limit sensor 23 of the storage tank 1A provided in the supply section 3A of the secondary sorting section B
The vibrating device 15 of the vibrating conveying gutter 2A provided below may be stopped based on the detection signal B. Further, the supporting legs may be provided to be vertically adjustable as necessary.

Effects of the Invention As described above, the color sorting device of the present invention efficiently and cyclically communicates between the primary sorting section and the secondary sorting section, so that the particle flow rate in the photoelectric sorting chamber can be minimized. In addition to greatly increasing the sorting efficiency by increasing Since the amount of particles supplied in the primary sorting is controlled according to the amount of particles in the supply section, the flow rate of particles flowing through the sorting process is stable with no excess or deficiency, and efficient sorting work can be performed smoothly and quickly at all times.

[Brief explanation of drawings]

The drawings are illustrations of embodiments of the present invention. Figure 1 is a side sectional view of this device, Figure 2 is a perspective view of the main parts of this device,
FIG. 3 is an explanatory diagram of the particle flow process, and FIG. 4 is a side sectional view of the bottom of the machine frame. 1, 1A... Storage tank, 2, 2A... Vibrating conveyance gutter, 3, 3A... Supply section, 4... Downflow gutter, 5... Photoelectric sorting room, 6... Sorting gutter tube, 7... Box-shaped machine frame, 8... Injection Nozzle, 9... Control circuit, 10... Photoelectric device, 11...
Light-receiving element, 12... Light source, 13... Particle collecting tube for particle regulation,
14... Unusual particle discharge port, 15... Vibration device, 16...
Secondary lifter, 17, 17A...supply port section, 18...
Conveyor for cross-feeding, 19...Primary lifter, 20... Conveyor for transverse feed, 21, 21A...Discharge port section, 22, 22
A... Side wall opening, 23... Particle amount detector, 23A...
Particle amount upper limit sensor, 23B... Particle amount lower limit sensor, 24... Supply amount adjustment device, 24A... Particle amount upper limit sensor, 25... Alarm, 26... Overflow window,
27... Spare tank for return, 28... Outlet, 29...
Support leg, 30...space part.

Claims (1)

[Claims] 1. The amount of light obtained by projecting light onto the falling particles is detected by a light-receiving element, and the output is communicated to a control circuit to operate the injection nozzle. In a sorting device in which a plurality of photoelectric sorting chambers for separating particles are arranged side by side in a machine frame, the plurality of photoelectric sorting chambers are divided into an arbitrary number of primary sorting sections and secondary sorting sections, and The different color particle discharge port of each photoelectric sorting chamber provided in the sorting section is connected to the supply port of the secondary granulator which is connected to the supply section of the secondary sorting section, and the The granulation collecting tube for grading in each of the photoelectric sorting chambers provided is connected to the supply port of the primary granulator which connects to the supply section of the primary sorting section, and A particle amount detector is provided, and the particle amount detector and the supply amount adjusting device provided in the supply section of the primary sorting section are connected via a control circuit,
A color sorting device that controls the supply amount of the primary sorting section according to the amount of particles in the supply section of the secondary sorting section. 2. Connecting the discharge ports of the primary granulator and the secondary granulator to side wall openings of storage tanks provided in the supply parts of the primary sorting section and the secondary sorting section, respectively. A color sorting device according to claim 1. 3. The color sorting device according to claim 1 or 2, wherein a particle amount detector provided in the supply section of the primary sorting section is connected to an alarm via a control circuit. 4. The storage tank provided in the supply section of the secondary sorting section is connected to a return reserve tank that collects particles that overflow from an overflow window provided on the side wall of the tank, and the discharge port of the return reserve tank is connected to the above-mentioned 2. A color sorting device according to claim 1, which is connected to a supply port of a next-use granulator. 5. The color sorting device according to claim 1, wherein the transverse conveyor is provided in a space separated from the machine frame surface inside a support leg that supports the machine frame bottom.