KR102373228B1 - Integrated apparatus for supplying hydraulic pressure for injection molding machine - Google Patents

Abstract

The present application relates to an integrated hydraulic supply device for a hydraulic injection molding machine, and the integrated hydraulic supply device for a hydraulic injection molding machine according to an embodiment of the present invention includes a plurality of connection flow pipes respectively connected to hydraulic circuits of a plurality of hydraulic injection molding machines. ; an integrated hydraulic pump connected to the plurality of connection passage pipes to supply hydraulic oil, and maintaining the hydraulic pressure in the connection flow passage tube at a preset hydraulic pressure; and setting operating conditions of the plurality of hydraulic injection molding machines to minimize the peak hydraulic pressure of the hydraulic oil required during operation of the plurality of hydraulic injection molding machines, and controlling the operation of the plurality of hydraulic injection molding machines according to the operating conditions It may include a control unit for generating a signal.

Description

Integrated apparatus for supplying hydraulic pressure for injection molding machine

The present application relates to an integrated hydraulic supply device for a hydraulic injection molding machine, and more particularly, to an integrated hydraulic supply device for a hydraulic injection molding machine capable of integrally providing hydraulic oil supplied to a plurality of hydraulic injection molding machines.

The injection molding machine is an apparatus capable of obtaining a molded article by injecting a resin heated and molten in a heating cylinder into the cavity space of a mold apparatus at high pressure and then cooling and solidifying the resin in the cavity space. To this end, the injection molding machine is provided with a clamping device and an injection device, the clamping device is provided with a fixed template and a movable template, and the clamping cylinder moves the movable template back and forth to perform mold closing, mold opening, etc. . The injection device includes a heating cylinder for heating and melting the resin supplied from the hopper and an injection nozzle for injecting the molten resin, and is installed in the heating cylinder so that the screw can rotate freely and move forward and backward freely. In addition, the resin can be metered by advancing the screw and injecting the resin by the injection nozzle and retracting the screw.

In general, a product may be produced by providing a plurality of injection molding machines to increase production, and at this time, hydraulic pumps may be individually installed in each injection molding machine. However, in the case where all hydraulic injection molding machines are individually equipped with hydraulic pumps, the maximum hydraulic pressure required for the operation of all hydraulic injection molding machines installed in the factory may be greatly exceeded. That is, compared to the capacity of the hydraulic pump actually used, hydraulic facilities and the like may be excessively provided. In addition, when the hydraulic pumps of the hydraulic injection molding machines are individually driven, the amount of power used in the respective hydraulic pumps overlaps and peak power may be generated, and additional power facilities for this may be required. In addition, when a hydraulic pump is provided for each individual hydraulic injection molding machine, there is also a problem such as difficulty in integrated management or maintenance of the hydraulic pump.

An object of the present application is to provide an integrated hydraulic supply device for a hydraulic injection molding machine that can provide hydraulic oil supplied to a plurality of hydraulic injection molding machines in an integrated manner.

The present application provides an integrated hydraulic supply device for a hydraulic injection molding machine capable of separately providing a clamping unit and an injection unit of a plurality of hydraulic injection molding machines, and separately providing hydraulic oil supplied to the clamping unit and hydraulic oil supplied to the injection unit, respectively want to

An integrated hydraulic supply apparatus for a hydraulic injection molding machine according to an embodiment of the present invention includes: a plurality of connection passage pipes respectively connected to hydraulic circuits of a plurality of hydraulic injection molding machines; an integrated hydraulic pump connected to the plurality of connection passage pipes to supply hydraulic oil, and maintaining the hydraulic pressure in the connection flow passage tube at a preset hydraulic pressure; and a control unit that sets operating conditions of the plurality of hydraulic injection molding machines to minimize the peak hydraulic pressure of the hydraulic oil required during operation of the plurality of hydraulic injection molding machines, and controls the operation of the plurality of hydraulic injection molding machines according to the operating conditions may include

Here, the control unit may control the operation of the plurality of control valves for adjusting the flow rate of the hydraulic oil supplied to the hydraulic actuators of the plurality of hydraulic injection molding machines.

Here, the connection flow pipe may connect each of the clamping hydraulic circuits and the injection hydraulic circuits provided in the clamping part and the injection part of the hydraulic injection molding machine to the integrated hydraulic pump.

Here, the control unit may apply a delay time to each of the driving points of the plurality of hydraulic injection molding machines to set the operating conditions.

Here, the control unit extracts each hydraulic pattern of the hydraulic oil required according to the process of the plurality of hydraulic injection molding machines, overlaps the hydraulic patterns to create an overlapping hydraulic pattern, and minimizes the peak hydraulic pressure displayed in the overlapping hydraulic pattern. By adjusting the time axis positions of the hydraulic patterns, the delay time may be set.

Here, the controller may set a different delay time for each process of the plurality of hydraulic injection molding machines.

Here, the integrated hydraulic pump may provide a supply capacity of at least the peak hydraulic pressure.

An integrated hydraulic supply apparatus according to another embodiment of the present invention includes: a plurality of clamping passage pipes connected to a clamping hydraulic circuit provided in a clamping unit of a plurality of hydraulic injection molding machines; a plurality of injection passage pipes connected to the injection hydraulic circuit provided in the injection unit of the plurality of hydraulic injection molding machines; a clamping hydraulic pump unit connected to the plurality of clamping flow pipes to supply hydraulic oil and maintaining the hydraulic pressure in the clamping flow pipe at a preset clamping hydraulic pressure; an injection hydraulic pump unit connected to the plurality of injection flow pipes to supply hydraulic oil and maintaining the hydraulic pressure in the injection flow pipe at a preset injection hydraulic pressure; and setting operating conditions of the plurality of hydraulic injection molding machines to minimize the peak hydraulic pressure of the hydraulic oil required during operation of the plurality of hydraulic injection molding machines, and controlling the operation of the plurality of hydraulic injection molding machines according to the operation information It may include a control unit.

Here, the control unit may apply a delay time to each of the driving times of the plurality of hydraulic injection molding machines, and may set the operation conditions as the driving conditions.

Here, the control unit extracts each hydraulic pattern of the hydraulic oil required according to the process of the plurality of hydraulic injection molding machines, overlaps the hydraulic patterns to create an overlapping hydraulic pattern, and minimizes the peak hydraulic pressure displayed in the overlapping hydraulic pattern. By adjusting the position of the time axis of the hydraulic patterns, the delay time can be set.

Incidentally, the means for solving the above problems do not enumerate all the features of the present invention. Various features of the present invention and its advantages and effects may be understood in more detail with reference to the following specific embodiments.

According to the integrated hydraulic supply apparatus of the hydraulic injection molding machine according to an embodiment of the present invention, it is possible to provide the hydraulic oil supplied to a plurality of hydraulic injection molding machines in an integrated manner. Therefore, it is possible to significantly reduce the investment in the hydraulic equipment and the like compared to the case of configuring each hydraulic pump or the like.

According to the integrated hydraulic supply device of the hydraulic injection molding machine according to an embodiment of the present invention, since facilities such as a hydraulic pump are integrated and managed, repair, replacement, addition, etc. of hydraulic equipment such as a hydraulic pump are easy to manage. In addition, even in the case of adding a hydraulic injection molding machine, it is possible to easily change the supply capacity of the integrated hydraulic supply device.

According to the integrated hydraulic supply device of the hydraulic injection molding machine according to an embodiment of the present invention, hydraulic pressure can be supplied by distinguishing the injection part and the clamping part of the plurality of hydraulic injection molding machines. In this case, since a flow path pipe or a control line is not located between the injection unit and the clamping unit, the working environment can be improved and safety accidents can be prevented.

1 is a schematic diagram showing a hydraulic injection molding machine and a hydraulic pattern thereof according to an embodiment of the present invention.
2 is a schematic diagram showing a hydraulic circuit of a hydraulic injection molding machine according to an embodiment of the present invention.
3 is a graph showing an overlapping hydraulic pressure pattern according to the operation of a plurality of hydraulic injection molding machines.
4 is a block diagram showing an integrated hydraulic supply device according to an embodiment of the present invention.
Figure 5 is a schematic diagram showing the operation of the integrated hydraulic supply device according to an embodiment of the present invention.
6 is a block diagram showing an integrated hydraulic supply device according to another embodiment of the present invention.
7 is a schematic diagram showing the operation of the integrated hydraulic supply device according to another embodiment of the present invention.

Hereinafter, preferred embodiments will be described in detail so that those of ordinary skill in the art can easily practice the present invention with reference to the accompanying drawings. However, in describing the preferred embodiment of the present invention in detail, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the same reference numerals are used throughout the drawings for parts having similar functions and functions.

In addition, throughout the specification, when a part is 'connected' with another part, it is not only 'directly connected' but also 'indirectly connected' with another element interposed therebetween. include In addition, 'including' a certain component means that other components may be further included, rather than excluding other components, unless otherwise stated.

1 and 2 are schematic views showing a hydraulic injection molding machine and its hydraulic circuit according to an embodiment of the present invention.

1 and 2 , the hydraulic injection molding machine 1 according to an embodiment of the present invention may include a clamping unit 10 , an injection unit 20 , and a hydraulic circuit 30 .

Hereinafter, a hydraulic injection molding machine 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2 .

The clamping unit 10 may include a fixed platen 11 , a movable platen 12 , a tie bar 13 , and a clamping cylinder 14 . The fixed template 11 is a fixed plate and may include an insertion hole 11a. The convex portion of the upper mold 17 is inserted into the insertion hole 11a so that the upper mold 17 can be attached to the fixed platen 11 . The fixed template 11 may be installed on the plurality of tie bars 13 , and the fixed template 11 may be fixed to a right end of the tie bar 13 .

At the left end of the tie bar 13 , a clamping cylinder 14 may be installed. A rod of the clamping cylinder 14 may be connected to the movable template 12 with a link portion 15 interposed therebetween. The movable template 12 is a plate to which the lower mold 16 is attached, and may be guided by a tie bar 13 . That is, when the rod of the clamping cylinder 14 is extended, the movable platen 12 is guided by the tie bar 13 to move toward the fixed platen 11 .

The injection unit 20 may include an injection cylinder 21 , a heating unit 22 , a hopper 23 , a screw 24 , a nozzle unit 25 , and an insertion cylinder 26 . A screw 24 may be installed on the rod of the injection cylinder 21 , and the heating unit 22 may be integrally formed with the frame of the injection cylinder 21 to cover the screw 24 . A nozzle part 25 may be formed at the front end of the heating part 22 . The rod of the injection cylinder 21 may be connected to the hydraulic motor 46 , and the screw 24 may be rotated according to the rotation of the hydraulic motor 46 .

A hopper 23 for supplying the resin for injection may be installed in the heating unit 22 . The resin in the hopper 23 can move in the direction of the nozzle part 25 by rotation of the screw 24 . At this time, the resin may be heated by the heating unit 22 to be plasticized.

The injection cylinder 21 , the heating unit 22 , the hopper 23 , the screw 24 , and the nozzle unit 25 are movable in the left-right direction by the insertion cylinder 26 . That is, when the rod of the insertion cylinder 26 is extended, the nozzle part 25 may be inserted into the mold 17 of the fixed template 11 . Thereafter, when the rod of the injection cylinder 21 is extended, the nozzle unit 25 may inject the plasticized resin therein through the upper mold 17 of the fixed template 11 .

Hydraulic actuators, such as the cylinder 14 for clamping, the injection cylinder 21, the insertion cylinder 26, and the hydraulic motor 46, are supplied with hydraulic oil by the hydraulic circuit 30, and can operate. The hydraulic circuit 30 may include a hydraulic pump 31 and control valves 32 , 34 , 35 , 41 , 42 , 44 . The hydraulic pump 31 may pressurize the hydraulic oil supplied to each hydraulic actuator into the hydraulic circuit 30 . The hydraulic pump 31 may have a capacity capable of simultaneously operating hydraulic actuators such as the clamping cylinder 14 , the injection cylinder 21 , the insertion cylinder 26 , and the hydraulic motor 46 . However, in reality, since the hydraulic actuators do not all operate at the same time, the capacity of the hydraulic motor 46 may be set larger than the capacity actually required by the hydraulic injection molding machine 1 .

Here, the first control valve 32 may control the pilot pressure of the unloader valve 33 to unload the discharge pressure of the hydraulic pump 31 . Through this, it is possible to reduce the power consumption as much as possible, to prevent an increase in oil temperature, and to prolong the life of the pump. That is, by the first control valve 32 , the hydraulic pump 31 can be converted into a load state or a no-load state. The second control valve 34 may switch the hydraulic oil supplied to the clamping cylinder 14 to be supplied to the cap side pressure chamber 14a or the head side pressure chamber 14b. The third control valve 35 may start or stop the supply of hydraulic oil to the head side pressure chamber 14b. The fourth control valve 41 may switch the supply direction of the hydraulic oil to the insertion cylinder 26 to the cap-side pressure chamber 26a or the head-side pressure chamber 26b. The fifth control valve 42 may switch the supply direction of the hydraulic oil to the injection cylinder 21 to the cap-side pressure chamber 21a or the head-side pressure chamber 21b. The sixth control valve 44 may start or stop the supply of hydraulic oil to the hydraulic motor 46 . The seventh control valve 47 and the relief valves 48 , 49 , and 50 may be used for adjusting the back pressure of the injection cylinder 21 and the insertion cylinder 26 .

Next, the operation of the injection molding machine 1 will be described. The injection molding machine 1 may produce a product by sequentially performing a mold closing process, an injection process, a metering process, a cooling process, and a mold opening process. Here, the control valve may operate according to input control signals, and the control signals are electricity applied to each of the solenoids 32a, 34a, 34b, 35a, 41a, 41b, 42a, 42b, 44a, 47a, and 47b. It could be a signal.

First, the first control valve 32 may switch the hydraulic pump 31 to a load state according to an input control signal. Thereafter, in the mold closing process, an electric signal is transmitted to the solenoid 32a of the first control valve 32 , the solenoid 34a of the second control valve 34 , and the solenoid 35a of the third control valve 35 according to the control signal. may be authorized. In this case, the movable platen 12 may advance so that the convex portion 16a of the lower mold 16 can be inserted into the concave portion 17a of the upper mold 17 . In addition, by applying an electric signal to the solenoid 32a of the first control valve 32 and the solenoid 34a of the second control valve 34, the upper mold 17 and the lower mold 16 can be fixed. . That is, the clamping cylinder 14 may supply a pressure capable of withstanding the pressure applied to the lower mold 16 during the injection process. At this time, a gap may be formed between the convex portion 16a of the lower die 16 and the concave portion 17a of the upper die 17 .

In the subsequent injection process, an electric signal is applied to the solenoid 32a of the first control valve 32, the solenoid 34a of the second control valve 34, and the solenoid 41b of the fourth control valve 41, The injection cylinder 21 , the heating unit 22 , the hopper 23 , the screw 24 and the nozzle unit 25 can be advanced. In this case, the nozzle unit 25 may be inserted into the upper mold 17 . After the nozzle unit 25 is inserted, electricity is applied to the solenoid 32a of the first control valve 32 , the solenoid 34a of the second control valve 34 , and the solenoid 42b of the fifth control valve 42 . signal can be applied. In this case, the rod of the injection cylinder 21 can advance, and the plasticized resin stored at the tip of the heating unit 22 passes through the injection hole 17b of the nozzle unit 25 and the mold 17 . Through this, it can be injected into the void formed between the convex portion 16a of the lower mold 16 and the concave portion 17a of the upper mold 17 .

When the injection process is completed, an electric signal is applied to the solenoid 32a of the first control valve 32 and the solenoid 41a of the fourth control valve 41, the injection cylinder 21, the heating tube 22, The hopper 23, the screw 24 and the nozzle part 25 are retracted, the solenoid 32a of the first control valve 32, the solenoid 47b of the seventh control valve 47, and the sixth control valve ( 44), the rod of the injection cylinder 21 can be retracted by applying an electric signal to the solenoid 44a. Thereafter, the resin injected into the void formed between the convex portion 16a of the mold 16 and the concave portion 17a of the mold 17 may be cooled for a preset time.

In the metering process, the screw 24 may be rotated by driving the hydraulic motor 46 , and the resin in the hopper 23 may be supplied into the heating unit 22 according to the rotation of the screw 24 . In addition, the resin supplied into the heating unit 22 may be heated and melted by the heating unit 22 .

After the cooling process, a mold opening process may be performed. In the mold opening step, the mold can be opened by applying an electric signal to the solenoid 32a of the first control valve 32 and the solenoid 34b of the second control valve 34 to retract the movable template 12. . In addition, the formed resin product may be removed from the lower mold 16 by being pushed by a cylinder (not shown) protruding from the through hole 16b of the lower mold 16 .

Meanwhile, the hydraulic pressure required when the injection molding machine operates may be the same as the hydraulic pressure pattern shown in FIG. 1( b ). That is, in the case of an injection molding machine, high hydraulic pressure may be required momentarily in the injection process, and hydraulic pressure may be required in processes such as mold closing and mold opening.

1, a product may be produced using one hydraulic injection molding machine 1, but it is also possible to produce a product by installing a plurality of hydraulic injection molding machines 1 in one factory. In this case, hydraulic pumps may be individually provided in each hydraulic injection molding machine 1, and the capacity of each hydraulic pump may be set assuming that all hydraulic actuators connected to the hydraulic circuit operate simultaneously.

However, when all hydraulic injection molding machines (1) are individually equipped with hydraulic pumps, the total capacity of the hydraulic pumps installed in the factory greatly exceeds the maximum hydraulic pressure required for the operation of the entire hydraulic injection molding machine (1) installed in the factory. can stand That is, compared to the capacity of the hydraulic pump actually used, hydraulic facilities and the like may be excessively provided. In addition, when the hydraulic pumps of the hydraulic injection molding machines 1 are individually driven, the amount of power used in the respective hydraulic pumps overlaps and peak power may be generated high, so power facilities for this may be required. In addition, when a hydraulic pump is provided for each individual hydraulic injection molding machine 1, there is also a problem such as difficulty in integrated management or maintenance of the hydraulic pump.

On the other hand, since the integrated hydraulic supply device according to an embodiment of the present invention can provide the hydraulic pressure of a plurality of hydraulic injection molding machines in an integrated manner, it is possible to easily solve the above-mentioned problems. Hereinafter, an integrated hydraulic supply device according to an embodiment of the present invention will be described.

4 is a block diagram illustrating an integrated hydraulic supply device according to an embodiment of the present invention, and FIG. 5 is a schematic diagram showing a hydraulic circuit of the integrated hydraulic supply device according to an embodiment of the present invention.

4 and 5 , the integrated hydraulic supply device 100 according to an embodiment of the present invention may include a plurality of connection flow pipes 110 , an integrated hydraulic pump 120 , and a control unit 130 . there is.

Hereinafter, an integrated hydraulic supply device according to an embodiment of the present invention will be described with reference to FIGS. 4 and 5 .

The connection flow pipe 110 may be connected to the hydraulic circuits of the plurality of hydraulic injection molding machines 1, 2, ..., n, respectively. The connection flow pipe 110 may connect between the hydraulic circuit of the hydraulic injection molding machines 1, 2, ..., n and the integrated hydraulic pump 120, and the hydraulic oil supplied by the integrated hydraulic pump 120 may be connected to each other. It can be supplied by the hydraulic circuit of That is, as shown in FIG. 5 , the hydraulic pump may be omitted in the hydraulic circuit of each hydraulic injection molding machine, and the connecting flow pipe 110 may be connected to the position of the hydraulic pump. Through this, the hydraulic circuits of each hydraulic injection molding machine may receive hydraulic pressure provided by the integrated hydraulic pump 120 through the connection flow pipe 110 .

Meanwhile, referring to FIG. 5 , the left side is a clamping hydraulic circuit for supplying hydraulic oil to the clamping unit 10 based on the connection flow pipe 110 , and the right side is an injection hydraulic circuit for supplying hydraulic oil to the injection unit 20 . corresponds to Here, the connection flow pipe 110 is connected to both the clamping hydraulic circuit and the injection hydraulic circuit, so that hydraulic pressure can be supplied to both sides.

The integrated hydraulic pump 120 may be connected to a plurality of connection flow pipes 110 to supply hydraulic oil in the connection flow pipe 110 . Each of the hydraulic injection molding machines (1, 2, ..., n) may receive hydraulic oil from the connection flow pipe 110 for the operation of a hydraulic actuator, etc. In this case, the hydraulic pressure in the connection flow pipe 110 will drop. can At this time, since the integrated hydraulic pump 150 can increase the flow rate of the hydraulic oil supplied to the connection flow pipe 110 , it is possible to constantly maintain the hydraulic pressure in the connection flow pipe 110 at the set hydraulic pressure. That is, the integrated hydraulic pump 120 may perform a function of constantly maintaining the hydraulic pressure in each connection flow pipe 110 as a set hydraulic pressure, and the hydraulic injection molding machines 1, 2, ... , n are integrated Hydraulic pressure required to perform each process may be obtained from the hydraulic pump 120 .

On the other hand, as shown in Figures 4 and 5, the integrated hydraulic pump 120 can be connected to a plurality of hydraulic injection molding machines (1, 2, ..., n) through the connection flow pipe 110, It is possible to maintain the hydraulic pressure in all the connected connection flow pipe 110 as the set hydraulic pressure. Accordingly, the individual hydraulic injection molding machines do not need to have their own hydraulic pump, and the necessary hydraulic pressure can be supplied from the integrated hydraulic pump 120 .

However, the number of the plurality of hydraulic injection molding machines connected to the integrated hydraulic pump 120 may be determined according to the supply capacity of the integrated hydraulic pump 120 . That is, since the integrated hydraulic pump 120 can maintain the set hydraulic pressure within the range of the supply capacity, hydraulic injection molding machines can be added within a range that does not exceed the supply capacity of the integrated hydraulic pump 120 . Depending on the embodiment, it is possible to set the number of hydraulic injection molding machines connected to the integrated rock pump 120 on the assumption that each hydraulic injection molding machine simultaneously requires the maximum hydraulic pressure. However, in this case, the number of hydraulic injection molding machines connectable to the integrated hydraulic pump 120 may be excessively reduced, or excessive hydraulic equipment may be required for the integrated hydraulic pump 120 .

As shown in FIG. 1(b), since the hydraulic pressure required for each process of the hydraulic injection molding machine is generally different, if the operating conditions of a plurality of hydraulic injection molding machines 1, 2, ..., n are adjusted, the integration It is possible to disperse the hydraulic pressure required for the hydraulic pump 120 . That is, it is possible to reduce the peak hydraulic pressure required for the integrated hydraulic pump 120 through the setting of operating conditions for the hydraulic injection molding machines. It is possible to increase the number. Specific operating conditions for each of the hydraulic injection molding machines may be set in the control unit 130 .

Meanwhile, depending on the embodiment, the integrated hydraulic pump 120 may be implemented in a form in which a plurality of hydraulic pumps are connected. That is, the supply capacity of the integrated hydraulic pump 120 can be increased by adding a hydraulic pump connected to the integrated hydraulic pump 120 . In this case, since hydraulic equipment such as hydraulic pumps can be integrated and managed in a certain place, it is advantageous to add, replace, manage, etc. hydraulic equipment such as hydraulic pumps, compared to a case in which a hydraulic pump is provided for each hydraulic injection molding machine in the related art. there is.

The control unit 130 may set the operating conditions of the plurality of hydraulic injection molding machines 1, 2, ..., n, and may generate a control signal for controlling the operation of the control valve according to each operating condition. As described above, the control valve can control the hydraulic oil supplied to the hydraulic actuators of the hydraulic injection molding machines 1, 2, ..., n according to the control signal, and through this, each hydraulic actuator can be driven. . Here, the control signal applied to the control valve may be an electrical signal transmitted to the solenoid of the control valve. The control unit 130 may control the hydraulic injection molding machine to perform each process by sequentially transmitting control signals corresponding to the mold closing, injection, metering, cooling, mold opening, and ejection processes.

Meanwhile, the control unit 130 may set operating conditions for the plurality of hydraulic injection molding machines 1, 2, ..., n, respectively. Here, the operating conditions set for each hydraulic injection molding machine may be a driving time of each hydraulic injection molding machine and a delay time set at each driving time.

The hydraulic injection molding machine can repeat the mold closing, injection, metering, cooling, mold opening and ejection processes sequentially, starting from a set driving time. However, when a plurality of hydraulic injection molding machines perform each process at the same time, as shown in FIGS. 3 ( a ) and 3 ( b ), the hydraulic patterns of each hydraulic injection molding machine overlap and the integrated hydraulic pump 120 . ), a problem such as a large increase in the peak hydraulic pressure required for Here, since a plurality of hydraulic injection molding machines do not necessarily have to perform the same process at the same time, it is a waste of cost and equipment to provide hydraulic facilities in a factory on the assumption that all of the plurality of hydraulic injection molding machines perform the same process at the same time. can

Accordingly, the control unit 130 sets the operating conditions of each hydraulic injection molding machine to control the operation of each hydraulic injection molding machine, thereby lowering the peak hydraulic pressure in the entire flow rate pattern. Specifically, at least some of the hydraulic injection molding machines can be controlled to have different processes, thereby lowering the peak hydraulic pressure of the entire hydraulic pattern used by all hydraulic injection molding machines. In this case, the hydraulic pattern of the plurality of hydraulic injection molding machines is Since it is dispersed as shown in 3(c), it is possible to reduce the peak hydraulic pressure compared to the case of FIG. 3(b) to perform the same process at the same time.

Specifically, the control unit 130 can reduce the magnitude of the peak hydraulic pressure required for the integrated hydraulic pump 120 by dispersing the driving time. That is, the controller 130 may set the driving timing of the plurality of hydraulic injection molding machines to minimize the peak hydraulic pressure of the plurality of hydraulic injection molding machines as shown in FIG. (c).

The control unit 130 may extract the hydraulic pattern of the hydraulic oil required according to the process of each hydraulic injection molding machine as shown in Fig. 3(a), and overlap a plurality of hydraulic patterns as shown in Fig. 3(b) to overlap the hydraulic pattern. can create Here, the hydraulic pattern is a pattern representing the hydraulic pressure for each time required for driving the hydraulic injection molding machine, and may be distinguished for each process performed by the hydraulic injection molding machine. Thereafter, the controller 130 may move the hydraulic patterns on the time axis to set positions of the hydraulic patterns having the minimum peak hydraulic pressure of the overlapping hydraulic pattern as shown in FIG. 3( c ). In this case, based on the positions of the hydraulic patterns at which the peak hydraulic pressure is minimized, the delay time for the driving times of the hydraulic injection molding machines corresponding to each hydraulic pattern may be set. Here, the delay time may be a time taken until the driving time of each hydraulic injection molding machine based on the driving time of one hydraulic injection molding machine that initially starts the operation. For example, when the driving time of the first hydraulic injection molding machine is 9:10, the second hydraulic injection molding machine may set a delay time of 5 minutes to set 9:15 as the driving time. Accordingly, the control unit 130 may set the delay time of the hydraulic injection molding machines capable of minimizing the peak hydraulic pressure, thereby generating a control signal to control each hydraulic injection molding machine to operate. That is, by dispersing the hydraulic pressure in the entire system without being concentrated at a specific time, the hydraulic injection molding machine can be efficiently driven, and hydraulic equipment required for the entire system can be reduced.

On the other hand, depending on the embodiment, not the delay time for the driving time of each hydraulic injection molding machine, it is possible to set the delay time for each process, in this case it is also possible to set a different delay time for each process. For example, with respect to any one hydraulic injection molding machine, a delay time of 2 seconds may be applied at the start time of the injection process, and a delay time of 4 seconds may be applied at the start time of the metering process. That is, in order to minimize the peak hydraulic pressure, the delay time for each process may be set differently even for the start time of each process.

Figure 6 is a block diagram showing an integrated hydraulic supply device according to another embodiment of the present invention, Figure 7 is a schematic diagram showing a hydraulic circuit of the integrated hydraulic supply device according to another embodiment of the present invention.

6 and 7 , the integrated hydraulic supply device according to another embodiment of the present invention includes a clamping flow pipe 111 , an injection flow pipe 112 , a clamping hydraulic pump unit 121 , and an injection hydraulic pump unit 122 . ) and a control unit 130 .

Hereinafter, an integrated hydraulic supply device according to another embodiment of the present invention will be described with reference to FIGS. 6 and 7 .

The clamping flow pipe 111 is connected to the clamping hydraulic circuit provided in the clamping unit 10 of the plurality of hydraulic injection molding machines 1, 2, ..., n, and connects the clamping hydraulic circuit to the clamping hydraulic pump unit 121. can be connected with In addition, the injection flow pipe 112 may be connected to an injection hydraulic circuit provided in the injection unit of the plurality of hydraulic injection molding machines, and may connect the injection hydraulic circuit to the injection hydraulic pump unit 122 .

The clamping hydraulic pump unit 121 may be connected to the plurality of clamping flow pipes 111 to supply hydraulic oil, and through this, the hydraulic pressure in the clamping oil passage pipe may be maintained at a preset clamping hydraulic pressure. In addition, the injection hydraulic pump unit 122 may be connected to the plurality of injection flow pipe 112 to supply hydraulic oil, and maintain the hydraulic pressure in the injection flow pipe as a preset injection hydraulic pressure. That is, the clamping hydraulic pump unit 121 and the injection hydraulic pump unit 122 supply hydraulic oil to the clamping flow pipe 111 and the injection flow pipe 112, respectively, and the clamping unit 10 and the injection unit 20. It is possible to operate hydraulic actuators located in the

6 and 7, the clamping hydraulic circuit and the injection hydraulic circuit may be distinguished from each other, and may be formed independently without being connected to each other. Conventionally, since the mold part and the injection part of the hydraulic injection molding machine are configured as a single hydraulic circuit, there is a problem in that a flow path pipe or a control line is complicatedly connected between the injection part and the mold part. On the other hand, in the case of the configuration as shown in Figs. 6 and 7, since the clamping hydraulic circuit and the injection hydraulic circuit can be separated from each other, the flow pipe located between the clamping unit 10 and the ejecting unit 20 or Control lines, etc. can be eliminated or minimized. Furthermore, since the clamping hydraulic pump unit 121 and the injection hydraulic pump unit 122 are separately provided, the stability of the hydraulic drive system can be increased, and each failure detection or response to the failure can be easily performed. can get

On the other hand, the control unit 130 may set the operating conditions of the plurality of hydraulic injection molding machines (1, 2, ..., n) to minimize the peak hydraulic pressure of the hydraulic oil required during operation of the plurality of hydraulic injection molding machines, A control signal corresponding to the condition may be generated. The control signal generated by the control unit 130 may be transmitted to the control valve of each hydraulic injection molding machine. However, since the operation condition setting and control signal generation of the control unit 130 have been described above, a detailed description thereof will be omitted herein.

Additionally, although it is shown that the clamping hydraulic pump unit 121 and the injection hydraulic pump unit 122 are separately provided in FIGS. 6 and 7 , according to the embodiment, each in one integrated hydraulic pump 120 . It may also be implemented to perform a function. That is, as shown in FIGS. 6 and 7 , the clamping hydraulic pump unit 121 and the injection hydraulic pump unit 122 are physically separated to separately supply hydraulic pressure to the clamping unit and the injection unit, respectively, but one integrated It is also possible for the hydraulic pump 120 to supply hydraulic pressure to the clamping unit and the injection unit, respectively.

The present invention is not limited by the above embodiments and the accompanying drawings. For those of ordinary skill in the art to which the present invention pertains, it will be apparent that the components according to the present invention can be substituted, modified and changed without departing from the technical spirit of the present invention.

1: Hydraulic injection molding machine 10: Clamping part
20: injection unit 30: hydraulic circuit
100: integrated hydraulic supply device 110: connection flow pipe
111: mold flow passage tube 112: injection passage tube
120: hydraulic pump unit 121: clamp hydraulic pump unit
122: injection hydraulic pump unit 130: control unit

Claims (10)

a plurality of connection passage pipes respectively connected to the hydraulic circuits of the plurality of hydraulic injection molding machines;
an integrated hydraulic pump connected to the plurality of connection flow pipes to supply hydraulic oil, and maintaining the hydraulic pressure in the connection flow pipe at a preset hydraulic pressure; and
A control unit for setting operating conditions of the plurality of hydraulic injection molding machines to minimize the peak hydraulic pressure of the hydraulic oil required during operation of the plurality of hydraulic injection molding machines, and controlling the operation of the plurality of hydraulic injection molding machines according to the operating conditions; to include,
the control unit
By applying a delay time to each of the driving points of the plurality of hydraulic injection molding machines, the operating conditions are set,
the control unit
Each of the hydraulic patterns is extracted according to the process of the plurality of hydraulic injection molding machines, the hydraulic patterns are overlapped to create an overlapping hydraulic pattern, and the time axis of the hydraulic patterns to minimize the peak hydraulic pressure displayed in the overlapping hydraulic pattern. The integrated hydraulic supply device, characterized in that by adjusting the position to set the delay time.
According to claim 1, wherein the control unit
Integrated hydraulic supply device, characterized in that for controlling the operation of a plurality of control valves for controlling the flow rate of the hydraulic oil supplied to the hydraulic actuators of the plurality of hydraulic injection molding machines.
According to claim 1, wherein the connection flow pipe
The integrated hydraulic supply device, characterized in that each of the clamping hydraulic circuits and injection hydraulic circuits provided in the clamping unit and the injection unit of the hydraulic injection molding machine are connected to the integrated hydraulic pump.
delete delete According to claim 1, wherein the control unit
Integrated hydraulic supply device, characterized in that setting a different delay time for each process of the plurality of hydraulic injection molding machines.
According to claim 1, wherein the integrated hydraulic pump is
An integrated hydraulic supply device, characterized in that it provides a supply capacity equal to or greater than the peak hydraulic pressure.
a plurality of clamping passage pipes connected to the clamping hydraulic circuit provided in the clamping portion of the plurality of hydraulic injection molding machines;
a plurality of injection passage pipes connected to the injection hydraulic circuit provided in the injection unit of the plurality of hydraulic injection molding machines;
a clamping hydraulic pump unit connected to the plurality of clamping flow pipes to supply hydraulic oil and maintaining the hydraulic pressure in the clamping flow pipe at a preset clamping hydraulic pressure;
an injection hydraulic pump unit connected to the plurality of injection passage pipes to supply hydraulic oil, and maintaining the hydraulic pressure in the injection flow passage tube at a preset injection oil pressure; and
A control unit that sets operating conditions of the plurality of hydraulic injection molding machines to minimize the peak hydraulic pressure of the hydraulic oil required during operation of the plurality of hydraulic injection molding machines, and controls operations of the plurality of hydraulic injection molding machines according to the operation information to include,
the control unit
By applying a delay time to each of the driving points of the plurality of hydraulic injection molding machines, the operating conditions are set,
the control unit
Each of the hydraulic patterns is extracted according to the process of the plurality of hydraulic injection molding machines, the hydraulic patterns are overlapped to create an overlapping hydraulic pattern, and the time axis of the hydraulic patterns to minimize the peak hydraulic pressure displayed in the overlapping hydraulic pattern. The integrated hydraulic supply device, characterized in that by adjusting the position to set the delay time. delete delete

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