JP2005231865A - Material transportation device and transportation control method using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a material transportation device capable of automatically transporting an amount of material asked by a transportation destination which is changed from transportation origin even if transportation destination is changed. <P>SOLUTION: This material transportation device is provided with a material tank 9a, an opening and closing device 11 for the material tank, a transportation pipe 3 connected with the opening and closing device to transport a material by gas stream, a material catching device 2a in which the material flowing in the transportation pipe is put, a granular material amount detection part 4 for detecting amount of material in the material catching device, a gas stream generating source 7 for generating gas stream in the transportation pipe, a transportation destination controller 5 for operating the gas stream generating source based on a signal from the granular material amount detection part, a gas pressure detection part 12 for detecting pressure fluctuation in the transportation pipe, and a transportation origin controller 13 for opening and closing the opening and closing device based on a signal of the gas pressure detection part. The transportation origin controller measures transportation time based on a detection signal of the gas pressure detection part and stores it. It controls the opening and closing device based on the previously measured transportation time when transporting material the next time and discharges the material. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a material transport device for transporting a material such as a granular material of a synthetic resin raw material required by a transport destination by a gas flow and a transport control method for transporting the material using the material transport device.

  Conventionally, this type of material transport apparatus is as shown in FIG. That is, the gas / powder separator 60 used in a molding machine (not shown) detects a detection signal through the signal line 62 from the detector 61 that detects the absence of the synthetic resin powder that has entered. Is taken in by the second control device 63 to actuate the actuating device 64, and the actuating device 64 drives the suction device 65. Then, the suction device 65 generates a gas flow of air in the transport pipe 66 through the gas / powder particle separator 60 to reduce the pressure.

  As a result, the gas pressure detector 67 provided at the top of the transport pipe 66 detects the pressure reduction in the transport pipe 66, and the first control device 69 that takes in the detection signal of the gas pressure detector 67 through the signal line 68 is The operating device 70 is controlled, and the opening / closing device 71 is opened by the operating device 70. And the granular material currently stored in the granular material storage tank 72 enters the transport pipe 66 through the open switchgear 71, is conveyed by a gas flow, is transported to the gas / powder particle separator 60, and is gas. It is separated and stored.

  In this way, the transport device transports the powder from the powder storage tank 72 to the gas / powder separator 60, and the transport source side of the powder storage tank 72 and the gas / powder separator. Even if there is no signal line for electrical control with the transport destination side of 60, the transport control can be smoothly performed by using the gas flow that transports the granular material.

  Also, as shown in FIG. 6, in order to transport the powder from the two powder storage tanks 72 connected to the transport pipe 66, the second control device 63 is provided with an operating device 64 based on the detection signal of the detector 61. In addition to driving the suction device 65, a plurality of air suction patterns are set and stored in advance, and air is sucked during suction by opening the electromagnetic valve 73 at predetermined short intervals by the air suction pattern. The pressure in the transport pipe 66 is changed at an interval of a predetermined short time by flowing into the device 65, and the air suction pattern 67 can be detected through the transport pipe 66.

  On the other hand, when the ON signal detected by the gas pressure detection unit 67 is once, the first control device 69 opens the opening / closing device 71 of the left granular material storage tank 72. When the ON signal is twice, the first control device 69 opens the right powder. When the opening and closing device 71 of the granular material storage tank 72 is opened and the ON signal is three times, the opening and closing devices 71 of the left and right granular material storage tanks 72 can be opened and the respective granular materials can be sent. It is possible to control the transport of granules.

  However, in such a granular material transport apparatus, only one gas / powder particle separator 60 is shown in FIG. 6 as the transportation destination, which is normally connected to the molding machine. Therefore, when the transport destination of the granular material is changed as necessary, the transport amount of the granular material is also changed.

  However, although the structure corresponding to such a point is not shown in this granular material transport device, in general, whenever the transport destination is changed, the worker on the transport destination side is the transport source side. It is necessary to go to the first control device 69 of the powder storage tank 72 and change the setting of the transport amount of the powder. That is, the one-batch transport amount required at the transport destination differs for each transport destination that is each molding machine. Usually, the one-batch transport amount depends on the time during suction transport, and the suction device 65 One batch transport amount can be set with a suction time of.

The suction time of the suction device 65 is set in advance in the second control device 63 on the transport destination side as a transport time corresponding to the required transport amount. On the other hand, on the transportation source side, it is necessary to adjust the transport amount (also referred to as the cutout amount), which is the supply amount (discharge amount) of the granular material from the granular material storage tank 72 in accordance with the time of this one-batch transport amount. Come out. The worker is usually resident on the transport destination side, and after the operator selects and connects the necessary transport pipe, the worker moves to the transport source side to adjust the cutout amount, and the cutting time of the first control device 69 is reached. The transportation time (also referred to as the discharge time) will be adjusted, and care must be taken so as not to cause extremely troublesome work and erroneous work.
JP 2000-153922 A

  In view of the above-mentioned problems of the conventional technology, the problem to be solved by the present invention is that the amount of material required by the transportation destination can be easily obtained from the transportation source without trouble even if the amount of material requested by the transportation destination changes. It is an object of the present invention to provide a material transport device that can be transported to a vehicle and a transport control method using the same.

  The present invention includes a material tank, an opening / closing device that discharges powder particles of the material tank, a transportation pipe connected to the opening / closing device and transporting the material by a gas flow, and a transportation pipe connected to the transportation piping. A material collector for storing the material, a material amount detection unit for detecting the material amount of the material collector, and a gas flow from the material tank side toward the material collector side is generated in the transport pipe. A gas flow generation source to be operated, a transport destination control device that operates the gas flow generation source based on a detection signal from the material amount detection unit, a gas pressure detection unit that detects a pressure fluctuation in the transport pipe, and the gas A transport source control device that opens and closes the opening and closing device based on a detection signal of the pressure detection unit, the transport source control device measures and stores the transport time based on the detection signal of the gas pressure detection unit, and Last transportation at the time of transportation By controlling the opening and closing device for a time that is determined based on the measured time is a material transport device for discharging the material.

  Thus, the material can be efficiently transported without the user having to set the transport time by changing the transport destination or the amount of material at the transport destination.

  The material transport apparatus and transport control method of the present invention eliminates the need for manual setting of transport time on the transport source side every time the transport destination is changed or the amount of material at the transport destination is changed. The work efficiency can be improved.

  The first invention is a material tank, an opening / closing device for discharging the material in the material tank, a transportation pipe connected to the opening / closing device and transporting the material by a gas flow, and connected to the transportation pipe for transportation. A material collector for storing the material, a material amount detection unit for detecting the material amount of the material collector, and a gas flow from the material tank side toward the material collector side is generated in the transport pipe. A gas flow generation source to be operated, a transport destination control device that operates the gas flow generation source based on a detection signal from the material amount detection unit, a gas pressure detection unit that detects a pressure fluctuation in the transport pipe, and the gas A transport source control device that opens and closes the opening and closing device based on a detection signal of the pressure detection unit, the transport source control device measures and stores the transport time based on the detection signal of the gas pressure detection unit, and Last time when transporting Wherein for a time that is determined based on the transmission time measured switchgear control to the a material transport device for discharging the material.

  As a result, the transport source control device always measures and stores the transport time for each time based on the detection signal of the gas pressure detector, and the next transport control always uses the time determined based on the previous transport measurement time. It is possible to automatically control the switchgear to transport the amount of material required by the destination. Therefore, even if the transportation destination is changed or the amount of material at the transportation destination is changed, the transportation destination controller obtains the transportation destination for the next transportation at the time determined based on the previous transportation measurement time measured every time. The cut-out amount of the material is automatically transported.Every time the transport destination is changed or the material amount at the transport destination is changed, the user does not have to go to the transport source side and set the transport time efficiently. Can be transported.

  According to a second invention, in the first invention, the transport source control device stores a pressure measurement unit that measures a transport time based on a detection signal of the gas pressure detection unit, and a transport measurement time measured by the pressure measurement unit. A material transport device having a portion.

  As a result, the transport source control device that controls the opening and closing of the switchgear keeps the transport time for each time at the pressure measurement unit and stores it in the storage unit, so the previous transport measured every time for the next transport control. It is possible to automatically control the switchgear at a time determined based on the measurement time, eliminating the need for manual setting of the transport time on the transport source side, and improving efficient material transport and work efficiency. be able to.

  According to a third aspect of the present invention, in the first or second aspect of the invention, when the stored transportation time is reset, the transportation source controller opens and closes the opening and closing with a discharge time commensurate with discharging a minimum amount of material only the first time. It is a material transport device that controls the device to discharge the material.

  As a result, even if the previous transportation time is reset when the power is turned on, the transport source control device controls the switchgear and discharges the material in a time commensurate with the minimum amount of material being discharged. It is possible to prevent being blocked due to excessive entry.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the opening / closing device is constituted by an electric valve, and the transportation source control device sets a discharge time corresponding to the discharge amount of the material to open the electric valve. It is a material transport device configured to be obtained by time or number of times of opening and closing.

  As a result, it becomes possible for the transport source control device to continue to open the motorized valve according to the transport time or to intermittently open and close it. For example, since the transport distance is relatively short, the transport of the granular material is possible. If it is smooth, control the former motor-operated valve.If the particles are likely to clump during transportation because the transport distance is relatively long, use the latter motor-operated valve to reduce this. It can be divided and rationally stable transportation is possible according to the transportation environment.

  In a fifth aspect of the present invention based on any one of the first to fourth aspects, the transport source control device stores the opening time or the number of opening / closing times of the motor-operated valve in advance corresponding to the transport measurement time in the storage unit. It is a transport device.

  As a result, the transport source control device can perform control to keep the motor-operated valve open or intermittently repeat opening and closing according to the transport measurement time, and the same effect as the fourth invention can be expected.

  In a sixth aspect based on any one of the first aspect to the fifth aspect, the transport source control device includes a numerical value input setting unit capable of arbitrarily setting the opening time or the number of opening / closing times of the electric valve stored in the storage unit. It is the provided material transport apparatus.

  As a result, the numerical input setting unit of the transport source control device can be operated to arbitrarily change the opening time or the number of times of opening and closing of the motorized valve stored in the storage unit in advance, and it can cope with a wide range of transport destinations. The storage unit storing the opening time or opening / closing frequency of the motorized valve can be easily changed without replacing it with the transport source control device.

  In a seventh aspect based on any one of the first to sixth aspects, the gas pressure detector or the transport source control device outputs an ON signal when the pressure change in the transport pipe reaches a set value. It is the material transport apparatus which comprised.

  As a result, the gas pressure detection unit or the transport source control device does not discharge the material when the pressure change in the transport pipe is unstable, and discharges the material in a stable state when the set value is reached. Thus, malfunction due to slight pressure fluctuations can be eliminated, and since the gas flow is insufficient due to the gas flow leak on the gas flow source side, the transportation pipe can be prevented from being blocked by the transport material.

  An eighth invention is a transport control method for transporting a material by a gas flow using the material transport device according to any one of the first to seventh inventions. The effects of any of the inventions can be obtained, and the amount of material required by the destination can be efficiently transported.

  The object of the present invention can be achieved by using the first to eighth aspects of the present invention as the main part of the embodiment, so the details of the embodiment corresponding to each claim will be described below with reference to the drawings. It will be described and the best mode for carrying out the present invention will be described. The present invention is not limited to the present embodiment. Further, in the description of the present embodiment, the same reference numerals are given to the same configuration and the effects and the same description is not repeated.

(Embodiment 1)
1 is a schematic configuration diagram of a granular material transport apparatus and its transport control method according to Embodiment 1 of the present invention, and FIG. 2 is a transport source control in the same granular material transport apparatus and its transport control method. FIG. 3 is a configuration diagram of a main part of the apparatus, FIG. 3 is a control sequence diagram of the material transport apparatus and the transport control method thereof, and FIG. 4 is a transport source in the material transport apparatus and the transport control method of the powder body. FIG. 5 is a control flow of the control device, and FIG. 5 is a control flow of the material transport device and the transport destination control device in the transport control method.

  In FIG. 1 to FIG. 5, three small molding machines 1a, medium molding machines 1b, and large molding machines 1c having different processing capacities are respectively provided with the material transport apparatus of the present invention having the same configuration and transport control method. A granular material such as a synthetic resin, which is a molding material, is supplied from each of the material collectors 2a to 2c according to the capability.

  Three material collectors 2a to 2c, which are transport destinations of powder particles, which are examples of materials, are connected so that the powder particles can be supplied to the molding machines 1a to 1c, and the molding machines 1a to 1c are connected to each other. Large and medium, small and large capacities capable of supplying a granular material suitable for the processing capacity per unit time, and have been conveyed by a gas flow through a transport pipe 3 connected to the upper part Is formed in a funnel shape that is temporarily separated from the air, and has a powder amount detection unit 4 that is a material amount detection unit such as a level meter that detects the remaining amount of the powder in the middle.

  The granular material amount detection unit 4 checks whether or not the granular material in the material collectors 2a to 2c is equal to or less than a predetermined amount only at the start of material transportation. A detection signal is issued via 6. Therefore, the material collectors 2a to 2c are below the granular material amount detection unit 4 from when the granular material amount detection unit 4 issues a material request signal until the material is transported through the transport pipe 3. It is configured to have a capacity that can be formed by an amount of powder.

  The transport destination control device 5 controls the start and stop of the operation of the gas flow generation source 7 having an air suction function, and captures a signal equal to or less than a predetermined amount of the granular material detected by the granular material amount detection unit 4. Sometimes the gas flow generation source 7 is started to operate, and the material collectors 2a to 2c through the transport pipe 3 respond to the processing capacity per unit time of the molding machines 1a to 1c, so that the required amount of powder 3 includes a material transport timer (FIG. 3) including a material transport timer (FIG. 3) in which a manual setting of the transport time can be arbitrarily set in advance after each gas flow source 7 is operated only for the transport time necessary to obtain Side control sequence.

  That is, the transport destination control device 5 is composed of a microcomputer and its peripheral circuits, etc., and performs step 1 shown in FIG. 5 (hereinafter referred to as S) for executing the control sequence on the transport destination control side shown in FIG. ) To S5 are stored.

  The gas flow generation source 7 connects the suction pipe 8 to the upper center of the material collectors 2a to 2c, sucks the air in the transport pipe 3 through the material collectors 2a to 2c, and reduces the pressure in the transport pipe 3 To generate a gas flow. The material tanks 9a to 9e in which the granular material to be transported at the transportation source has an inlet and an outlet (both not shown) for storing the granular material, and are connected to the transportation destination communicated through the transportation pipe 3. It is installed in a position away from the material collectors 2a to 2c.

  In the present embodiment, the material tanks 9a to 9e are configured so that five types of powders having different materials (PE, PP, PBT, PC), colors, and the like can be sent according to the demands of the molding machines 1a to 1c as transport destinations. The transport pipe 3 is connected to a pipe joint portion 10 disposed at a position close to the transport destination side by the transport pipe 3, and the transport pipe 3 is connected to the pipe joint as indicated by a dotted line according to the demands of the molding machines 1b and 1c at the transport destination, for example. The connection is changed by the part 10 to change the material and color of the powder particles so that they can be transported to the material collector 2.

  The opening / closing device 11 can use, for example, a discharge electromagnetic valve that moves the valve with an electromagnetic plunger, or a discharge electric valve that moves the valve plate with an electric motor. In this embodiment, the discharge electromagnetic valve is used as an outlet of the material tanks 9a to 9e. It is provided and configured, and further connected to the transport pipe 3 to open and close the granular material from the material tanks 9a to 9e to the transport pipe 3 for discharging and stopping.

  The gas pressure detection unit 12 is provided with a mechanical or semiconductor pressure switch in the transport pipe 3 in the vicinity of the material tanks 9a to 9e, and detects a pressure change generated in the transport pipe 3 when the gas flow is generated and stopped. A signal is transmitted to the transport source control device 13 through the signal line 14. At this time, the pressure switch of the gas pressure detector 12 does not send a detection signal immediately after the pressure fluctuation, but the value arbitrarily detected and set in the pressure switch itself as shown in the control sequence diagram of FIG. 3 is configured to start when the pressure change in 3 reaches a stable region and exceeds it.

  Therefore, the gas pressure detection unit 12 is free from malfunction due to slight fluctuations in the pressure in the transport pipe 3, and the gas flow leaks on the gas flow source side to cause an insufficient gas flow to flow. It can also be prevented from being blocked.

  The transport source control device 13 controls the opening and closing device 11 to open when the signal of the gas pressure detection unit 12 that detects the pressure change when the gas flow is generated in the transport pipe 3, and opens the material tanks 9 a to 9. 9e is discharged into the transport pipe 3, and the amount of the powder required by the material collectors 2a to 2c corresponding to the transport time of the transport destination control device 5 that controls the gas flow generation source 7 is used as the material. The opening / closing device 11 is controlled to be closed after being opened for a discharge time that can be discharged (also referred to as cutting) from the tanks 9a to 9e.

  The discharge time must always be set to be less than the transport time. This is because, after the transport source side discharges the powder particles, the powder particles accumulated in the transport pipe are completely transported to the transport destination side. If the value of this discharge time is inappropriate, the granular material remains in the transportation pipe 3, which may cause clogging or insufficient transportation of the granular material.

  That is, the transport source control device 13 includes a pressure detection circuit unit 15, a pressure measurement unit 16, a timer monitoring unit 17 such as a switch, a counter monitoring unit 18, and a data storage unit which is a storage unit. 19 and the output control unit 20 and the like, and the control flow of S11 to S27 shown in FIG. 4 for executing the control sequence on the transportation source control side shown in FIG. In addition to measuring and storing the transport time of each time based on the detection signal of 12 and controlling the switchgear 11 at the time determined based on the previous transport measurement time at the next transport, the particulates are discharged. is there.

  The pressure detection circuit unit 15 takes in the signal of the gas pressure detection unit 12, and the pressure measurement unit 16 measures the transportation time for each transportation as shown in FIG. 3 based on the signal from the pressure detection circuit unit 15. The timer monitoring unit 17 and the counter monitoring unit 18 are operated manually by a person who uses the transport device in advance. That is, when the timer monitoring unit 17 is selected, based on the signal from the pressure detection circuit unit 15, the table of the operation mode I shown in the following (Table 1) stored in the data storage unit 19 is used, or the counter monitoring is performed. When the unit 18 is selected, the operation mode II table shown in the following (Table 2) stored in the data storage unit 19 is used.

  The data storage unit 19 opens the discharge solenoid valve that is kept open only for the transport measurement time measured by the pressure measurement unit 16 and the discharge time commensurate with sending the amount of the granular material required by the transport destination based on the transport measurement time. The operation mode I table shown in Table 1 where the time was experimentally determined, and a discharge solenoid valve that opens and closes a predetermined number of times corresponding to the discharge time that is commensurate with sending the amount of granular material required by the destination. The operation mode II table shown in Table 2 was experimentally obtained and the discharge time commensurate with discharging the minimum amount of material only the first time of transport when the stored transport measurement time was reset. The fixed timer for controlling the discharge solenoid valve is stored.

  Then, the transport source control device 13 determines the opening time of the discharge electromagnetic valve corresponding to the detection time of the gas pressure detection unit 12 which is the transport measurement time measured by the pressure measurement unit 16 from the table of (Table 1) of the data storage unit 19. Or, the number of opening and closing of the discharge electromagnetic valve is taken from the table of (Table 2) of the data storage unit 19, and the discharge electromagnetic valve is controlled by the powder particle discharge timer shown in FIG. The transportation measurement time measured by the pressure measurement unit 16 is stored in the data storage unit 19 and the time obtained from the table in (Table 1) or (Table 2) based on the previous transportation measurement time in the next transportation. When the discharge solenoid valve is automatically controlled to discharge the powder particles, and the previous transport measurement time is reset, the switchgear has a discharge time commensurate with the discharge of the minimum amount of powder particles only the first time. 11 control powder It is the structure for discharging the body. The minimum amount of granular material is an amount that does not allow the material to enter the transport pipe 3 and be blocked.

  The numerical value setting input unit 21 is configured by providing, for example, a dip switch, other switches, etc. in the transport source control device 13 so that a person using the transport device can operate in advance, and through the timer monitoring unit 17 or the counter monitoring unit 18, The operation mode I table shown in (Table 1) and the operation mode II table shown in (Table 2) are arbitrarily changed as shown in the following table (Table 3). It is configured as possible.

  The transportation source control device 13 is provided with a numerical value setting input unit 21 to support not only the three molding machines 1a to 1c but also a wide range of transportation destinations including molding machines having different processing capabilities. The data storage unit 19 of the original control device 13 can be easily dealt with without replacing new software.

  In the figure, reference numeral 22 denotes an outer case of the material tanks 9a to 9e, and the transport source control device 13 is exposed and attached.

  In the above embodiment, since the material transporting apparatus of the present invention for transporting powder particles to the small, medium and large molding machines 1a to 1c has the same configuration, the material transporting apparatus of the medium molding machine 1b is taken as an example. This will be described below. Based on the control flow on the transport destination side shown in FIG. 5, the operation and action of the powder particle transport device on the transport destination side will be described. When the transportation destination control device 5 is turned on, the granular material amount detection unit 4 detects the granular material amount contained in the material collector 2b in S1. When the particulate matter amount detection unit 4 detects a predetermined amount or less, the transport destination control device 5 that has captured this detection signal activates the material transport timer in S2 to start the gas flow generation source 7 to start operation. The flow generation source 7 sucks air in the transport pipe 3 through the suction pipe 8 and the material collector 2b to generate a gas flow, and the transport pipe 3 is decompressed. At this time, the pressure change is transmitted through the transport pipe 3 to the gas pressure detection unit 12 on the transport source control side.

  The transport source control device 13 that has received the detection signal of the gas pressure detection unit 12 opens the opening / closing device 11 and discharges the granular material from the material tank 9 b to the transport pipe 3. This granular material is conveyed in the transport pipe 3 by a gas flow and transported to the material collector 2b, and the granular material amount detection unit 4 detects the amount of the granular material in S3 and exceeds the predetermined amount. If not, the process proceeds to S4, and if the transport time set by the material transport timer of the transport destination control device 5 before the start of operation has passed, the process returns to S3.

  In addition, when the powder amount detection unit 4 detects that the amount of the powder is satisfied in S3, the transport destination control device 5 that has captured this detection signal stops the material transport timer in S5 or in S4. When the transport time of the material transport timer ends, the operation of the gas flow generation source 7 is stopped. Thus, the granular material is transported to the material collector 2b from the transporting material tank 9b.

  Next, based on the control flow on the transport source control side shown in FIG. 4, the operation and action of the powder particle transport device on the transport source control side will be described. The transportation source control device 13 is turned on to enter a standby state for transportation start, the pressure switch of the gas pressure detection unit 12 checks the pressure fluctuation in the transportation pipe 3 in S11, and the gas flow is generated in the transportation pipe 3. If not, the check is repeated, and when a stable and constant amount of gas flow is generated in the transport pipe 3 and the pressure change reaches the set value of the pressure switch, a reduced pressure state is detected.

  Then, in S12, the transport source control device 13 detects the detection signal of the gas pressure detection unit 12 that has detected the pressure change of the transport pipe 3 that has reached the set value at which the gas flow has already occurred, as shown in FIG. The detection circuit unit 15 takes in and starts measuring the transport time by the pressure measurement unit 16, and starts a delay timer (fixed start-up delay time td shown in FIG. 3) in S13. When this delay timer expires in S14, the operation mode I (Table 1) or the operation mode II (Table 2) in which the operation mode for controlling the switchgear 11 is selected in advance is used in S15, and the process proceeds to S16. It is checked whether the data storage unit 19 stores the data of the previous transport measurement time for controlling the switchgear 11 and transporting the powder particles.

  If it is checked in S16 that there is no data on the previous transportation measurement time in the data storage unit 19 (when the first material transportation or power is turned on and the previous transportation measurement time is reset), the process proceeds to S17 and is shown in FIG. As shown in FIG. 3, the granular material discharge timer is started, and the fixed timer value tf that can discharge the minimum amount of granular material from the table of (Table 1) or (Table 2) only for the first time transportation is shown in FIG. 11 is opened (when operation mode I is selected in advance), or the discharge solenoid valve is opened and closed as shown in FIG. 3 with the minimum number of fixed activations (when operation mode II is selected in advance). In step S18, the granular material is continuously discharged from the material tank 9b to the transport pipe 3 until the minimum discharge time has passed, and is prevented from entering the transport pipe 3 and being blocked.

  When the minimum discharge time has passed in S18, the process proceeds to S19, and the transport source control device 13 closes the discharge electromagnetic valve, which is the opening / closing device 11, as shown in FIG. And the pressure switch which is the gas pressure detection part 12 complete | finishes the material transport timer which the transport destination control apparatus 5 set, the gas flow generation source 7 stops, and there is no gas flow in the transport piping 3 by S20. If it detects, it will progress to S21 and will memorize | store the present transportation measurement time in the data storage part 19, and will complete | finish the control by the side of a transportation source.

  Next, the operation and action when the second material transport is performed from the transport destination control device 5 on the transport destination side to the transport source control device 13 on the transport source side will be described. The transport destination side also requests material transportation based on the control flow of S1 to S5 shown in FIG. 5 described above in the second material transportation. On the other hand, on the transportation source side, the control flow from S11 to S16 shown in FIG. 4 described above is the same as in the first transportation.

  Then, when the transport source control device 13 checks in S16 that the data of the previous transport measurement time for transporting the granular material is stored in the data storage unit 19, the process proceeds to S22 and is stored in the data storage unit 19 3 is determined from the table of operation mode I of (Table 1) or the table of operation mode II of (Table 2) based on the previous transport measurement time, and S23 As shown in FIG. 3, the discharge electromagnetic valve as the opening / closing device 11 is opened (when the operation mode I is selected in advance), or the discharge electromagnetic valve is opened and closed as shown in FIG. In step S24, the particulate matter is continuously discharged from the material tank 9b to the transportation pipe 3 until the value to1 of the particulate matter discharge timer corresponding to the previous transportation measurement time has passed.

  If it is checked in S24 that the powder discharge timer of the discharge solenoid valve is up, the process proceeds to S25, the discharge solenoid valve is closed, and the process proceeds to S26, and if the pressure switch as the gas pressure detection unit 12 detects OFF, the process proceeds to S27. The second current transportation measurement time ts2 measured each time by the measurement unit 16 is stored in the data storage unit 19, and the control on the transportation source side is terminated.

  When the third material request is requested from the transportation source side, the control sequence shown in FIG. 3 is executed by the control flow of S11 to S16 and S22 to S27 shown in FIG. 4 as in the second material transportation. The discharge solenoid valve is controlled until the particle discharge timer value to2 corresponding to the second transport measurement time ts2 has passed, and the particles are continuously discharged from the material tank 9b to the transport pipe 3.

  Further, as described above, from the state in which the molding machines 1a to 1c shown in FIG. 1 are supplied with the powder particles from the respective material collectors 2a to 2c, the transport destination control device 5 and the transport source control device are used. 13 without switching off the power supply, the transport pipe 3 on the transport side is connected by the pipe joint 10 as shown by the dotted line in FIG. 1, and the material tank 9b containing the white PE powder is compactly formed. The material transportation when the material tank 9c containing the PP granular material is connected to the medium-sized molding machine 1b and the transportation destination is changed will be described.

  The control sequence shown in FIG. 3 is executed according to the control flow shown in FIGS. 4 and 5 in the same manner as described above, and the granular material is transported from the respective material tanks 9b and 9c to the respective material collectors 2b and 2c. Is. However, the transport source control device 13 of the material tank 9c that transported and controlled the PP powder particles until the previous time by changing the transport destination is the amount of powder required by the material collector 2c in the compact molding machine 1a until now. The amount of time that can be discharged by the discharge solenoid valve is stored as the previous transport measurement time, and the transport source of the material tank 9b that controlled the transport of white PE powder until the previous time. The control device 13 stores, as the previous transport measurement time, the time that can be discharged by the discharge solenoid valve in an amount corresponding to the time for transporting the amount of the granular material required by the material collector 2b in the medium molding machine 1b until the previous time. Each has a different discharge time.

  Therefore, in the material transportation immediately after changing the transportation destination as shown by the dotted line in FIG. 1, the material collector 2a in the small molding machine 1a and the material collector 2b in the medium molding machine 1b are obtained. An amount different from the amount of the granular material is transported from the connected material tanks 9c and 9b, and each transport source control device 13 also measures the current transport measurement time measured by the pressure measuring unit 16. The data is stored in the data storage unit 19. From the next material transportation, based on the transportation measurement time measured by the pressure measurement unit 16 to transport the amount of powder and granule obtained by the material collectors 2a and 2b of the transportation destination changed last time, ( It is possible to control the number of opening and closing of the discharge solenoid valve within the time determined from the operation mode I table in Table 1) or the operation mode II table in (Table 2), and the transport amount is automatically adjusted.

  As described above, in this embodiment, even if the transportation destination is changed or the amount of material at the transportation destination is changed, the material that the transportation source control device determines in the next transportation is based on the previous transportation measurement time. The amount of cut out is automatically transported and the material is transported efficiently without changing the transport destination or changing the amount of material at the transport destination by the user at the transport source side and resetting the transport time. It can be carried out.

  In addition, even if the transport control device is reset, the switchgear is controlled and discharged in a transport time that is commensurate with the minimum amount of material being discharged. In the next transportation, the transportation can be performed accurately in the time determined based on the previous transportation measurement time corresponding to the material amount required by the transportation destination.

  In addition, the transport source control device can perform control to keep the motor-operated valve open or intermittently open and close according to the transport time.For example, since the transport distance is relatively short, the transport of the granular material is possible. If smooth, control the former motor-operated valve.If the particles are likely to clump during transport because the transport distance is relatively long, use the latter motor-controlled valve to reduce this. Can be transported reasonably and stably according to the transportation environment.

  In addition, since it is possible to arbitrarily change the opening time or the number of times of opening and closing the motorized valve stored in the storage unit in advance by operating a numerical input setting unit such as a switch of the transportation source control device, for example, a wide range of transportation destinations It can be applied to many molding machines, and can be easily changed without replacing the storage unit newly storing the opening time or the number of opening / closing times of the motorized valve with the transport source control device.

  The gas pressure detection unit detects a change in the pressure of the transport pipe when the set value is reached, outputs an ON signal to the transport source control device, and outputs a material discharge signal from the transport source control device to the discharge solenoid valve. Therefore, the pressure change in the transportation piping is not in an unstable state due to slight fluctuations, but the material is discharged in a stable state when it reaches the set value, and there is no malfunction due to slight pressure fluctuations, and the gas flow source side Since the gas flow is insufficient due to the gas flow leak, the transportation pipe can be prevented from being blocked by the transportation material.

  In the present embodiment, in order to detect a pressure change that has reached the stable range of the transport pipe 3, the gas pressure detection unit 12 is configured so that an arbitrary detection set value can be set. The detection set value can be set, and when the detection signal sent from the gas pressure detection unit 12 reaches the detection set value, the particulate discharge timer is started as shown in the control sequence diagram of FIG. Thus, the discharge solenoid valve may be controlled, and the same effect as that of the present embodiment can be expected.

  In the above-described embodiment of the present invention, the transport of the granular material has been described as an example. However, the material is not limited to the granular material as long as the material can be transported by a gas flow.

  As described above, the material transport device and the transport control method according to the present invention can improve the efficiency of material transport and work efficiency, and the gas flow from the remote transport source to the transport destination through the transport piping. It can be applied to transportation technology that transports materials.

1 is a schematic configuration diagram of a granular material transport device and a transport control method thereof according to Embodiment 1 of the present invention. The block diagram of the principal part of the transportation control apparatus in the transportation apparatus of the granular material in the same Embodiment 1, and its transportation control method Control sequence diagram of the particulate transport device and its transport control method according to the first embodiment Control flow of transport device of powder and granular material transport device and transport control device in transport control method according to embodiment 1 Control flow of transport device of powder and granular material transport device and transport destination control device in transport control method according to embodiment 1 Schematic configuration diagram of a conventional powder transportation device

Explanation of symbols

2a, 2b, 2c Material collector 3 Transport piping 4 Particulate matter amount detection unit (material amount detection unit)
DESCRIPTION OF SYMBOLS 5 Transport destination control apparatus 7 Gas flow generation source 9a, 9b, 9c, 9d, 9e Material tank 11 Switchgear (motorized valve)
12 Gas Pressure Detection Unit 13 Transport Source Control Device 19 Data Storage Unit (Storage Unit)
21 Numerical input setting section

Claims (8)

A material tank; an opening / closing device for discharging the material in the material tank; a transportation pipe connected to the opening / closing device for transporting the material by a gas flow; and a material connected to the transportation pipe for transporting the material A material collector, a material amount detection unit for detecting a material amount of the material collector, and a gas flow generation source for generating a gas flow from the material tank side toward the material collector side in the transport pipe. A transport destination control device that operates the gas flow generation source based on a detection signal from the material amount detection unit, a gas pressure detection unit that detects a pressure fluctuation in the transport pipe, and a detection signal of the gas pressure detection unit A transport source control device that opens and closes the opening / closing device based on the transport source control device. The transport source control device measures and stores the transport time based on the detection signal of the gas pressure detector, and measures the previous transport during the next transport. In time There for a time that is determined by the switchgear material transport device for discharging controlled to material. The material according to claim 1, wherein the transport source control device includes a pressure measurement unit that measures a transport time based on a detection signal of the gas pressure detection unit, and a storage unit that stores the transport measurement time measured by the pressure measurement unit. Transport equipment. 3. The transport source control device controls the opening / closing device to discharge the material at a discharge time commensurate with discharging the minimum amount of material only for the first time when the stored transport measurement time is reset. The material transport device described. The opening / closing device is constituted by an electric valve, and the transportation source control device is configured to obtain a discharge time corresponding to the discharge amount of the material by the opening time or the number of opening / closing times of the electric valve. The material transport device described. The material transport device according to any one of claims 1 to 4, wherein the transport source control device stores the opening time or the number of opening / closing times of the motor-operated valve in advance corresponding to the transport measurement time in the storage unit. The material transport device according to any one of claims 1 to 5, wherein the transport source control device is provided with a numerical input setting unit capable of arbitrarily setting an open time or the number of times of opening and closing of the motor-operated valve stored in the storage unit. The material transport device according to any one of claims 1 to 6, wherein the gas pressure detection unit or the transport source control device is configured to output an ON signal when a pressure change of the transport pipe reaches a set value. A transport control method for transporting a material by a gas flow using the material transport device according to claim 1.

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