JP5576058B2 - Molding machine system - Google Patents

Description

  The present invention relates to a molding machine system having a plurality of molding machines. The molding machine is, for example, a die casting machine or an injection molding machine.

  A molding machine system having a plurality of molding machines is known. Patent Document 1 discloses a molding machine system having a plurality of injection molding machines. The molding machine system of Patent Document 1 has a management device that manages a plurality of injection molding machines. The management device controls the operations of the plurality of injection molding machines so as to shift the operation timings (phases of the molding cycle) of the plurality of injection molding machines. As a result, the time when power consumption peaks in each injection molding machine is shifted between the plurality of injection molding machines, and the peak value of power consumption in the entire molding machine system decreases.

JP 2007-216181

  In actual operation of the molding machine system, various apparatuses must be properly arranged from the viewpoint of saving the arrangement space and ease of work by the operator. However, Patent Document 1 does not mention any aggregation of devices from such a viewpoint.

  An object of the present invention is to provide a molding machine system that can save the arrangement space of a plurality of molding machines.

  The molding machine system of the present invention includes a plurality of molding machines, a centralized power supply that supplies power to the plurality of molding machines, a centralized control device that controls operations of the plurality of molding machines, the centralized power supply, and the And a central housing that houses the central control device together.

  Preferably, the centralized power supply device is provided corresponding to a centralized switch capable of uniformly allowing or prohibiting power supply to the plurality of molding machines and the plurality of molding machines, and to the plurality of molding machines. And a plurality of individual switches capable of individually permitting or prohibiting the supply of electric power.

  Preferably, the display screen is exposed from the centralized casing and the power monitor accommodated in the centralized casing is exposed to the centralized control unit, and a signal corresponding to the input operation is output to the centralized control apparatus. An electric power monitor switching unit, wherein the central control device can display power consumption in the entire plurality of molding machines or power consumption in each of the plurality of molding machines on the power monitor, Based on the signal from the power monitor switching unit, the power consumption to be displayed is switched between the power consumption in the whole of the plurality of molding machines and the power consumption in each of the plurality of molding machines, and the power consumption in each of the plurality of molding machines. Is displayed, the molding machine on which power consumption is displayed is switched among the plurality of molding machines based on a signal from the power monitor switching unit.

  Preferably, the display surface is exposed from the centralized casing and the machine monitor accommodated in the centralized casing is exposed to the centralized controller, and a signal corresponding to the input operation is output to the centralized control device. A machine monitor switching unit, and the central control device is capable of displaying an operation state of each of the plurality of molding machines on the machine monitor, and is operated based on a signal from the machine monitor switching unit. The molding machine whose state is displayed is switched among the plurality of molding machines.

  Preferably, the apparatus further includes a first notification lamp and a plurality of second notification lamps provided corresponding to the plurality of molding machines, wherein the central control device is configured to generate an abnormality in each of the plurality of molding machines. When the presence / absence is determined and it is determined that an abnormality has occurred, the first notification lamp is driven, and the second notification lamp corresponding to the molding machine in which the abnormality has occurred is driven.

  Preferably, each of the plurality of molding machines has a hydraulic device, and a central tank shared by the plurality of hydraulic devices is provided.

  Preferably, the centralized control device controls operations of the plurality of molding machines so as to shift the phases of molding cycles in the plurality of molding machines.

  According to the present invention, the arrangement space of a plurality of molding machines can be saved.

The typical top view showing the composition of the molding machine system concerning a 1st embodiment of the present invention. Sectional drawing in the connection part periphery of the pump unit of FIG. 1, and a supply pipe | tube. Sectional drawing in the periphery of the connection part of the pump unit of FIG. 1, and a return pipe. The front view of the centralized control panel of FIG. The block diagram which shows the outline | summary of a structure of the signal processing system in the molding machine system of FIG. The conceptual diagram which shows the time-dependent change of the power consumption in the molding machine system of FIG. The figure which shows the outline | summary of the principal part of the die-casting machine of FIG. The figure which shows the structure of the hydraulic apparatus of the die-casting machine of FIG. The figure which shows the structure which concerns on the injection cylinder apparatus of the hydraulic apparatus of FIG. The figure which shows the time-dependent change of the injection speed and injection pressure of the die-casting machine of FIG. The top view which shows the outline | summary of the molding machine system which concerns on the 2nd Embodiment of this invention. Schematic which shows the structure of the hydraulic apparatus of the die-casting machine which concerns on a modification. Schematic which shows the principal part of the die-casting machine which concerns on a modification.

(First embodiment)
<Configuration and operation of the entire molding machine system>
First, the configuration and operation of the entire molding machine system will be described, and then the configuration and operation of a die casting machine included in the molding machine system will be described.
Note that, in various embodiments and modifications described below, the same components are denoted by the same reference numerals and description thereof is omitted.

  FIG. 1 is a schematic plan view showing the configuration of a molding machine system 1 according to the first embodiment of the present invention.

  The molding machine system 1 includes a plurality of die casting machines 3, a central tank 5 shared by the plurality of die casting machines 3, and a central control panel 7 that performs power supply and control to the plurality of die casting machines 3.

  The plurality of die casting machines 3 may be the same model or different models. In addition, the molds attached to the plurality of die casting machines 3 may form molded products having the same size and shape, or form molded products having different sizes and shapes. It may be. The period in the molding cycle of the plurality of die casting machines 3 and the processes included in the molding cycle may be the same or different from each other.

  The plurality of die casting machines 3 are arranged, for example, vertically and horizontally (Y direction and X direction). In other words, the molding machine system 1 includes a plurality of machine rows 4A, 4B, 4C,... (Hereinafter, A, B, C,... May be omitted) arranged in the X direction. The machine row 4 has a plurality (n) of die casting machines 3 arranged in the X direction.

  The die casting machine 3 includes a machine body 3a, a pump unit 9 for supplying hydraulic fluid (for example, oil) to the machine body 3a, a relay panel 11 for controlling the operations of the machine body 3a and the pump unit 9, and a user And an operation panel 13 for receiving the operation.

  The machine body 3a includes a mold clamping device 15 and an injection device 17 disposed adjacent to the mold clamping device in the horizontal direction. In the following, the direction (Y direction) orthogonal to the direction in which the mold clamping device 15 and the injection device 17 are arranged is referred to as the side of the machine body 3a (die casting machine 3, mold clamping device 15, or injection device 17). Sometimes.

  In each machine row 4, the plurality of die casting machines 3 are arranged with the machine body 3 a directed in the same direction. Specifically, in each machine row 4, the plurality of machine main bodies 3 a have the direction of the injection device 17 with respect to the mold clamping device 15 as a direction (X direction) orthogonal to the arrangement direction of the machine main bodies 3 a in the machine row 4. ing. In other words, in each machine row 4, the plurality of machine main bodies 3a are arranged so as to be adjacent to each other on the side.

  Further, the plurality of machine rows 4 are arranged such that the directions of the injection device 17 with respect to the mold clamping device 15 are opposite to each other in the adjacent machine rows 4. In other words, the adjacent machine rows 4 are arranged with the injection devices 17 facing each other (for example, 4A and 4B) or with the mold clamping devices 15 facing each other (for example, 4B and 4C). .

  The pump unit 9 includes a unit housing (accommodating member) 10 that accommodates a pump 133 (see FIG. 8) described later. The size, shape, and material of the unit housing 10 may be set as appropriate. The pump unit 9 (unit housing 10) is disposed on the injection device 17 side with respect to the mold clamping device 15 and the injection device 17 (machine body 3a). Here, the injection device 17 side relative to the mold clamping device 15 and the injection device 17 may be a side position of the injection device 17, or a position opposite to the mold clamping device 15 of the injection device 17. It may be. In FIG. 1, the case where the pump unit 9 is arrange | positioned in the position on the opposite side to the mold clamping apparatus 15 of the injection apparatus 17 is illustrated. In addition, the machine rows 4 (for example, 4A and 4B) that face the injection devices 17 face each other, and the pump units 9 face each other.

  The relay panel 11 has a relay housing 12 that houses an individual control device 59 (see FIG. 5) described later. The size, shape, and material of the relay housing 12 may be set as appropriate. The relay panel 11 (relay housing 12) is disposed adjacent to the pump unit 9, for example.

  The operation panel 13 includes an operation housing 14 that houses an input device 191 (see FIG. 9) and a display device 192 (see FIG. 9), which will be described later. The size, shape, and material of the operation housing 14 may be set as appropriate. The operation panel 13 (operation housing 14) is disposed on the side of the mold clamping device 15, for example. 1 exemplifies a case in which the direction of the operation panel 13 with respect to the machine body 3a (which side of the two sides is the same) is the same among the plurality of die casting machines 3. Yes. However, in each machine row 4, the direction of the operation panel 13 relative to the machine body 3 a may be reversed between adjacent die casting machines 3.

  The concentration tank 5 stores hydraulic fluid. In the concentration tank 5, the pressure of the liquid level is, for example, atmospheric pressure. The molding machine system 1 has a supply pipe 21 for supplying hydraulic fluid from the central tank 5 to the plurality of die casting machines 3 and a return pipe 22 for returning the hydraulic fluid from the plurality of die casting machines 3 to the central tank 5. doing. In FIG. 1, the return pipe 22 is indicated by a broken line for convenience.

  The supply pipe 21 includes a concentration pipe 21 a extending from the concentration tank 5, a plurality of main pipes 21 b branched from the concentration pipe 21 a, and a plurality of branch pipes 21 c branched from the main pipe 21 b and connected to the pump unit 9. Yes. The concentration pipe 21a, the main pipe 21b, and the branch pipe 21c may be configured by appropriately selecting appropriate piping members such as a steel pipe and a hose.

  Each of the plurality of main pipes 21b extends along the machine row 4 between the two machine rows 4 facing the injection devices 17 with each other. Each of the plurality of branch pipes 21c is branched from the main pipe 21b at a position that is generally closest to each pump unit 9 in the main pipe 21b.

  The return pipe 22 has substantially the same configuration as the supply pipe 21. That is, the return pipe 22 also has a concentration pipe 22a, a main pipe 22b, and a branch pipe 22c, and these configurations are substantially the same as those of the concentration pipe 21a, the main pipe 21b, and the branch pipe 21c.

  The supply pipe 21 and the return pipe 22 are provided with a plurality of gate valves 23 that open and close these flow paths at a plurality of appropriate positions. For example, the gate valve 23 is provided in each of the plurality of branch pipes 21c and 22c. The gate valve 23 is provided in each of the plurality of main pipes 22b or each of the second and subsequent main pipes (this case is illustrated in FIG. 1). The gate valve 23 may be manually opened and closed, or may be opened and closed using magnetism or hydraulic fluid.

  As a configuration related to the centralized tank 5, the molding machine system 1 further includes a liquid temperature adjuster 25 that adjusts the temperature of the hydraulic fluid stored in the centralized tank 5, and the hydraulic fluid stored in the centralized tank 5. And a liquid washer 26 for purification. Further, the molding machine system 1 includes a filter 27 that filters the working fluid supplied from the central tank 5 to the supply pipe 21 and a filter 28 that filters the hydraulic fluid returned from the return pipe 22 to the central tank 5. Yes. Further, the molding machine system 1 includes a level sensor 29 that detects a liquid level (liquid level height) in the centralized tank 5.

  For the level sensor 29, a known appropriate method such as a float switch method, a magnetic method, an optical method, an electrode method, or an ultrasonic method may be applied. The level sensor 29 outputs an electrical signal corresponding to the liquid level of the central tank 5 to the central control panel 7.

  The central control panel 7 is disposed adjacent to the central tank 5, for example. In addition to the plurality of die casting machines 3, for example, a printer 31 is connected to the central control panel 7. For example, the printer 31 is disposed adjacent to the central control panel 7.

  FIG. 2 is a cross-sectional view around the connecting portion between the pump unit 9 and the supply pipe 21. FIG. 3 is a cross-sectional view around the connecting portion between the pump unit 9 and the return pipe 22.

  The pump unit 9 has an individual tank 33 communicated with the centralized tank 5 through the supply pipe 21 and the return pipe 22. The individual tank 33 is housed in the unit housing 10 or is configured integrally with the unit housing 10. The supply pipe 21 and the return pipe 22 are connected to the bottom surface of the individual tank 33, for example.

  The liquid level of the individual tank 33 is set to the same level as the liquid level of the concentrated tank 5. For example, the individual tank 33 is provided with an air breather 35 (FIG. 3) for opening a space on the liquid level to the atmosphere. Thereby, the pressure of the liquid level in the individual tank 33 is set to the same level (atmospheric pressure) as the pressure of the liquid level of the concentration tank 5, and both liquid levels are at the same level.

  A suction pipe 37 (FIG. 2) and a discharge pipe 38 (FIG. 3) are inserted into the individual tank 33 (in the working fluid thereof). The suction pipe 37 and the discharge pipe 38 are inserted into the working fluid from above the liquid level, for example.

  The suction pipe 37 is connected to a suction port of a pump 133 (FIG. 8) of the pump unit 9 described later. Accordingly, the hydraulic fluid supplied from the centralized tank 5 to the individual tank 33 via the supply pipe 21 is supplied to the machine body 3 a via the suction pipe 37.

  As will be described later, the discharge pipe 38 is connected to various cylinder devices and the like included in the machine body 3a. Then, the hydraulic fluid discharged from various cylinder devices and the like is discharged to the individual tank 33 through the discharge pipe 38. The hydraulic fluid discharged to the individual tank 33 is returned to the concentration tank 5 through the return pipe 22.

  In the individual tank 33, the position to which the suction pipe 37 is connected and the position to which the discharge pipe 38 are connected may be completely partitioned or communicated via a communication portion in which a filter is arranged. It does not have to be partitioned at all. In this application, when both positions are completely partitioned, the case where the individual tank 33 is comprised by two tanks shall be included. In the following, the individual tank 33 will be illustrated and described on the assumption that the individual tank 33 is not partitioned.

  A filter may be appropriately provided in the individual tank 33 or the periphery thereof. In FIG. 3, the case where the filter 39 is provided in the connection part of the return pipe 22 and the individual tank 33 is illustrated. The filter 39 is made of, for example, a wire mesh.

  FIG. 4 is a front view of the centralized control panel 7.

  The centralized control panel 7 includes a centralized power supply device 41 that supplies power to a plurality of die casting machines 3, a centralized control device 43 that controls the operation of the plurality of die casting machines 3, a centralized power supply device 41, and a centralized control device 43. And a central housing 45 for housing.

  The centralized power supply device 41 includes, for example, a transformer (not shown) and the like, converts commercial power into an appropriate voltage, and supplies it to a plurality of die casting machines 3. When the voltages to be applied are different among the plurality of die casting machines 3, the power of the voltage corresponding to each die casting machine 3 may be generated in the centralized power supply device 41 or generated in each die casting machine 3. May be.

  The central control device 43 is configured to include, for example, a CPU and a memory (not shown). The central control device 43 performs a predetermined calculation based on signals input from various devices and outputs control signals to the various devices. Devices that input signals to the central control device 43 are, for example, the relay panel 11 and the level sensor 29 of the plurality of die casting machines 3. Devices to which control signals are input from the central control device 43 are, for example, the relay boards 11 and the printers 31 of the plurality of die casting machines 3.

  The central housing 45 is made of metal, for example. The central housing 45 includes, for example, a base 45a, a first divided housing 46A disposed on the base 45a, and a second divided housing 46B disposed on the base 45a and adjacent to the first divided housing 46A. have. Hereinafter, the first divided housing 46A and the second divided housing 46B may be simply referred to as “divided housing 46” without being distinguished from each other.

  Each of the divided housings 46 is formed in a rectangular parallelepiped shape, for example, and a door portion 46a is formed on the front surface (one of vertical surfaces). The central power supply device 41 and the central control device 43 are exposed to the outside of the central housing 45 by opening the door 46a. Thereby, maintenance of the centralized power supply device 41 and the centralized control device 43 can be performed.

  The plurality of parts constituting the centralized power supply device 41 and the plurality of parts constituting the centralized control device 43 may be appropriately distributed to the two divided housings 46. FIG. 4 illustrates a case where the main part of the centralized power supply device 41 is accommodated in the first divided housing 46A and the main part of the centralized control device 43 is accommodated in the second divided housing 46B.

  Various display devices and operation members are exposed at the door 46a. These are attached to the door 46a, or are accommodated in the divided housing 46 so as to be exposed from an opening formed in the door 46a when the door 46a is closed.

  In the door portion 46a of the first divided housing 46A, a main power switch (centralized switch) 47, a main power lamp 48, a plurality of machine power switches (individual switches) 49 arranged in a row, and a row. A plurality of machine power lamps 50 arranged in the same manner are exposed.

  The main power switch 47 is a switch for turning on or off the power of the entire molding machine system 1. Specifically, when the main power switch 47 is turned on or off, power is supplied to or cut off from the central control panel 7, the level sensor 29, the plurality of die casting machines 3, and the like. The main power switch 47 is constituted by, for example, an alternate type (push-on / push-off type) switch that is switched between an ON state and an OFF state each time it is pushed.

  The main power lamp 48 indicates whether the main power switch 47 is on or off. Specifically, the main power lamp 48 is turned on when the main power switch 47 is in the ON state, and is turned off when the main power switch 47 is in the OFF state. The main power lamp 48 includes, for example, an LED, and is disposed adjacent to the main power lamp 48.

  Each of the plurality of machine power switches 49 is provided corresponding to each of the plurality of die casting machines 3, and power supply to the corresponding die casting machine 3 can be individually permitted or prohibited. That is, when the plurality of machine power switches 49 are selectively turned on or off, power is selectively supplied to or cut off from the plurality of die casting machines 3. Each machine power switch 49 is composed of an alternate type switch, for example, like the main power switch 47.

  It should be noted that the supply or interruption of power to each die casting machine 3 by turning on or off by each machine power switch 49 is based on the premise that the main power switch 47 is turned on. In other words, each die casting machine 3 is supplied with power when the main power switch 47 and each machine power switch 49 are ON, and supplied with power when either the main power switch 47 or each machine power switch 49 is OFF. Not.

  Each of the plurality of machine power lamps 50 is provided corresponding to each of the plurality of machine power switches 49, and indicates whether the corresponding machine power switch 49 is in an ON state or an OFF state. For example, as with the main power lamp 48, each machine power lamp 50 is turned on when turned on and turned off when turned off. Each of the plurality of machine power lamps 50 includes, for example, an LED, and is provided adjacent to the corresponding machine power switch 49.

  Further, the power monitor 51 and the power monitor switching unit 52 adjacent to the power monitor 51 are exposed in the door 46a of the second divided housing 46B.

  The power monitor 51 is constituted by, for example, a liquid crystal display device or an organic EL display device, and can display an image including characters and figures. The power monitor 51 displays the power consumption in the molding machine system 1 or the temporal change (waveform) of the power consumption in any one of the plurality of die casting machines 3. The power consumption waveform is displayed, for example, in a range from the present to a predetermined time. Note that the power consumption in the molding machine system 1 is substantially the same as the power consumption in the entire plurality of die casting machines 3, and in the present application, these will be described without particular distinction.

  In the power monitor 51, which power consumption of the molding machine system 1 and the die casting machine 3 is displayed is determined by an operation on the power monitor switching unit 52. Further, when the power consumption of the die casting machine 3 is displayed, which power consumption of the plurality of die casting machines 3 is displayed is determined by an operation on the power monitor switching unit 52. The power monitor switching unit 52 includes, for example, a plurality of switches. The switch included in the power monitor switching unit 52 is, for example, a push-type switch (for example, a dome-type switch) that outputs a signal by contacting a contact each time the switch is pressed.

  Furthermore, in the door 46 a of the second divided housing 46 B, the machine monitor 53, the first machine monitor switching unit 54 disposed in the vicinity of the machine monitor 53, and the second machine monitor switching unit adjacent to the machine monitor 53 55 is exposed.

  The machine monitor 53 is configured by a liquid crystal display device or an organic EL display device, for example, similarly to the power monitor 51. The machine monitor 53 displays the change with time of the indicator of the operation state in any one of the plurality of die casting machines 3. The operating state index is, for example, an injection speed, an injection pressure, and a mold temperature.

  Which of the plurality of die casting machines 3 is displayed on the machine monitor 53 is determined by an operation on the first machine monitor switching unit 54. In the machine monitor 53, which of the plurality of indicators indicating the driving state is displayed is determined by an operation on the second machine monitor switching unit 55. The first machine monitor switching unit 54 and the second machine monitor switching unit 55 are configured to include a plurality of push-type switches, for example, similarly to the power monitor switching unit 52.

  The power monitor 51 and the machine monitor 53 may display appropriate information other than the information described above. For example, the change over time in the liquid level of the concentration tank 5 may be displayed based on the detection result of the level sensor 29.

  The waveform displayed on the power monitor 51 and the machine monitor 53 can be printed by the printer 31. Such a printing instruction is performed, for example, by an operation on the input unit 56 exposed from the door 46a of the second divided housing 46B. The input unit 56 is configured to include a plurality of push-type switches, for example, like the power monitor switching unit 52 and the like.

  The central control panel 7 further includes an alarm lamp (first notification lamp) 57 and a plurality of abnormal part display lamps for notifying the operator of the occurrence of the abnormality when an abnormality occurs in the plurality of die casting machines 3 and the like. (Second notification lamp) 58 is provided.

  The alarm lamp 57 is composed of, for example, a rotating lamp. When an abnormality occurs, the light source is turned on and a reflecting mirror that reflects light from the light source is rotated. The plurality of abnormal location display lamps 58 are provided corresponding to the plurality of die casting machines 3, for example, and when an abnormality occurs in any of the plurality of die casting machines 3, the corresponding abnormal location display lamps 58 are displayed. Light.

  FIG. 5 is a block diagram showing an outline of the configuration of the signal processing system in the molding machine system 1. In FIG. 5, only two relay boards 11 are illustrated, and only one abnormal part display lamp 58 is illustrated.

  Each of the plurality of relay boards 11 has an individual control device 59. The individual control device 59 controls the operation of each part of the die casting machine 3 by sequence control, for example.

  The centralized control device 43 outputs a timing command for instructing the start timing of sequence control to the plurality of individual control devices 59. The timing command is, for example, a trigger signal. In other words, each individual control device 59 starts sequence control when a timing command is input from the central control device 43. Thereby, the plurality of individual control devices 59 can perform sequence control by synchronizing with each other and shifting the phases of the molding cycles.

  Each of the plurality of individual control devices 59 outputs cycle data to the centralized control device 43. The cycle data includes information on various measurement values measured by the die casting machine 3. Various measurement values are, for example, injection speed, injection pressure, mold temperature, and power consumption. Note that the power consumption can be acquired by the centralized control panel 7 depending on the configuration of the centralized power supply device 41. The cycle data may be output to the central control device 43 every time the molding cycle ends, or may be sequentially output to the central control device 43 during the molding cycle.

  When the cycle data is input, the central control device 43 controls the power monitor 51 and the machine monitor 53 based on the cycle data and data obtained from the central control panel 7. Specifically, as described above, the centralized control device 43 displays the power consumption waveform on the power monitor 51 and switches the display of the power monitor 51 based on the signal from the power monitor switching unit 52. Further, the central control device 43 displays the operation state on the machine monitor 53 and switches the display of the machine monitor 53 based on the signals from the first machine monitor switching unit 54 and the second machine monitor switching unit 55. Further, the centralized control device 43 determines the presence or absence of an abnormality by comparing the measured value included in the cycle data or the like with a preset reference value, and when determining that an abnormality has occurred, The alarm lamp 57 and the abnormal part display lamp 58 are driven.

  The centralized control device 43 has an optimal timing calculation device 43a. The optimum timing calculation device 43a calculates the optimum timing for starting the sequence control in each of the plurality of individual control devices 59 based on the cycle data obtained from the plurality of die casting machines and the data obtained from the centralized control panel 7. Then, the centralized control device 43 outputs a timing command based on the calculation result.

  The optimum timing is calculated, for example, so that the power consumption in the molding machine system 1 (the plurality of die casting machines 3 as a whole) is leveled. The evaluation index as to whether or not leveling is performed may be selected as appropriate, such as the magnitude of the peak of power consumption and the length of time during which the power consumption is a predetermined value or more.

  Further, the calculation algorithm of the optimum timing calculation device 43a may be appropriately constructed. For example, the optimum timing calculation device 43a finds the optimum timing by adding the waveforms of the power consumption of the plurality of die casting machines 3 by assuming various timings for starting the molding cycle (by simulating). Good.

  FIG. 6 is a conceptual diagram showing a change in power consumption with time in the molding machine system 1. The horizontal axis represents time, and the vertical axis represents power consumption.

  A dotted line L1 indicates a change with time in power consumption in one die-casting machine 3. In FIG. 6, for the sake of easy understanding, the change in power consumption is simplified for the sake of convenience, and the change in power consumption in one die-casting machine 3 is indicated by binary values of 0% and 100%. Time T1 indicates the period of one molding cycle, and is 28 seconds as an example.

  In one die-casting machine 3, for example, in one molding cycle, power consumption is consumed in a mold closing process for closing a mold and an injection process for injecting a molten metal (molten metal material) as a molding material between the molds. To rise. Next, power consumption is reduced in the cooling process in which the molding material filled in the mold is cooled. Thereafter, power consumption increases in the mold opening process for opening the mold and the extrusion process for extruding the molded product from the mold. Then, the power consumption is reduced until the extruded molded product is taken out or the mold is sprayed and the next molding cycle is started.

  A broken line L2 indicates a change with time in power consumption of the two die casting machines when it is assumed that the molding cycle (sequence control) is started simultaneously in the two die casting machines 3. In this case, the magnitude of the power consumption peak is 200%, which is twice the magnitude of the power consumption peak when there is one die casting machine 3.

  The dotted line L1 and the entire solid line L3 indicate changes over time in power consumption of the two die casting machines when the two die casting machines 3 are operated in accordance with the timing calculated by the optimum timing calculation device 43a. In other words, the solid line L3 indicates the change over time in the power consumption of the second die casting machine 3.

  In this case, when the power consumption is low in the first die casting machine 3 (dotted line L1), the start timing of the molding cycle is set so that the power consumption of the second die casting machine 3 (solid line L3) is high. ing. As described above, the optimum timing is calculated by the optimum timing calculation device 43a, so that the waveform of the power consumption is leveled.

<Die-casting machine configuration>
FIG. 7 is a side view showing the main part of the die casting machine 3.

  The die-casting machine 3 holds a main mold 201 including a fixed mold 203 and a movable mold 205, and a mold clamping device 15 that opens and closes the main mold 201 and molds and a core 207 are put in and out of the main mold 201. And a core extraction device 105. Further, the die casting machine 3 includes an injection device 17 for injecting a molten metal into a cavity Ca formed in the main mold 201, and a molded product formed in the cavity Ca as a fixed mold 203 or a moving mold 205 (in FIG. 7, a moving mold 205). And an extrusion device 109 for extruding from the mold 205).

  The mold clamping device 15 is constituted by, for example, a toggle type mold clamping device. The mold clamping device 15 is disposed on the opposite side of the fixed die plate 111 of the fixed die plate 111 that holds the fixed die 203, the movable die plate 112 that holds the movable die 205, and the movable die plate 112. And a link housing 113. The mold clamping device 15 includes a plurality of tie bars 114 hung on the fixed die plate 111 and the link housing 113, a mold clamping cylinder device 115 provided on the link housing 113, and a driving force of the mold clamping cylinder device 115. And a toggle mechanism 117 for transmitting to the movable die plate 112. When the driving force of the mold clamping cylinder device 115 is transmitted to the moving die plate 112 via the toggle mechanism 117, the moving die plate 112 moves in the mold opening / closing direction (left and right direction in FIG. 7), and the mold opening / closing and Clamping is performed.

  Note that the base 104 that supports the fixed die plate 111 and the movable die plate 112 of the mold clamping device 15 is formed lower (thin) than the conventional base 104. This is because, conventionally, a tank for storing hydraulic fluid is provided in the base, and the base is high. In the present embodiment, however, no tank is provided in the base 104. Since the base 104 is formed low, workability is expected to be improved.

  The core pulling device 105 has a core cylinder device 119 that drives the core 207. In the core cylinder device 119, for example, a cylinder tube is fixed to the moving mold 205, and a piston rod is fixed to the core 207. The core pulling device 105 may be configured with an inclined pin or the like.

  The injection device 17 includes, for example, a sleeve 121 that communicates with the cavity Ca, an injection plunger 123 that can slide within the sleeve 121, and an injection cylinder device 125 that drives the injection plunger 123. The molten metal is supplied into the sleeve 121 by a ladle (not shown) and the injection plunger 123 moves forward in the sleeve 121 toward the cavity, whereby the molten metal is injected and filled into the cavity Ca.

  The extruding device 109 has an extruding pin 127 that pushes out the molded product through the moving mold 205 from behind, and an extruding cylinder device 129 that drives the extruding pin 127. In the extrusion cylinder device 129, the cylinder tube is fixed to the moving mold 205, and the piston rod is fixed to the extrusion pin 127. In the extrusion device 109, the cylinder tube may be fixed to the extrusion pin and the piston rod may be fixed to the moving mold 205.

  FIG. 8 is a diagram showing an outline of the configuration of the hydraulic device 130 including various cylinder devices (the mold clamping cylinder device 115, the core cylinder device 119, the injection cylinder device 125, and the extrusion cylinder device 129). In FIG. 8, for convenience of illustration, the individual tanks 33 are shown in two places.

  The mold clamping cylinder device 115, the core cylinder device 119, and the extrusion cylinder device 129 are constituted by a single-acting cylinder device. A cylinder tube (115t or the like, and an additional code t is added to the code of each cylinder device). A piston slidably accommodated in a cylinder tube (115p, etc., each cylinder device is indicated by an additional symbol p), and a piston rod (115r, etc., each cylinder fixed to the piston) The device code is indicated with an additional symbol r).

  The cylinder chamber inside the cylinder tube is divided into a piston-side rod-side chamber (115a, etc., with an additional symbol a added to the code of each cylinder device) and a head-side chamber (115b, etc.) on the opposite side. The cylinder device is divided into a code and an additional code b). The mold clamping cylinder device 115, the core cylinder device 119 and the extrusion cylinder device 129 are driven by selectively supplying hydraulic fluid (for example, oil) to the head side chamber and the rod side chamber.

  The injection cylinder device 125 is configured by, for example, a direct-coupled pressure increasing cylinder, and includes a piston rod 125r fixed to the injection plunger 123, an injection piston 125p fixed to the piston rod 125r, and an injection piston 125p. It has a pressure-increasing piston 125pp arranged behind, and a cylinder tube 125t that slidably accommodates an injection piston 125p and a pressure-increasing piston 125pp.

  The piston rod 125r is connected to the injection plunger 123 coaxially through a coupling 131 (FIG. 7), for example. The piston rod 125r may be fixed to the injection plunger 123 by being formed integrally with the injection plunger 123. The injection piston 125p is fixed to the rear end of the piston rod 125r.

  The cylinder tube 125t has a tube small-diameter portion 125ta on which the injection piston 125p slides, and a tube large-diameter portion 125tb that is continuous with the rear end of the tube small-diameter portion 125ta and has a larger diameter than the tube small-diameter portion 125ta. . The pressure-increasing piston 125pp has a piston small-diameter portion 125ppa that can slide the tube small-diameter portion 125ta and a piston large-diameter portion 125ppb that can slide the tube large-diameter portion 125tb.

  The cylinder chamber formed inside the small tube diameter portion 125ta is divided into a rod side chamber 125a on the piston rod 125r side and a head side chamber 125b on the opposite side by an injection piston 125p. The cylinder chamber formed inside the tube large diameter portion 125tb is partitioned into a front chamber 125c on the head side chamber 125b side and a rear chamber 125d on the opposite side by the piston large diameter portion 125ppb of the pressure increasing piston 125pp. .

  By supplying the working fluid to the head side chamber 125b, the injection piston 125p moves forward, and as a result, the injection plunger 123 moves forward toward the cavity Ca. When the hydraulic fluid is supplied to the rear chamber 125d, the pressure of the hydraulic fluid in the rear chamber 125d depends on the ratio of the pressure receiving area of the piston large diameter portion 125ppb to the pressure receiving area of the piston small diameter portion 125ppa by the pressure increasing piston 125pp. The pressure is increased and transmitted to the head side chamber 125b, and as a result, the molten metal in the cavity Ca is increased by the injection plunger 123.

  Hereinafter, cylinder tubes, piston rods, pistons (injection pistons in the case of the injection cylinder device 125), rod side chambers, and head side chambers of various cylinder devices (115, 119, 125, and 129) are denoted by additional symbols (t, r). , P, a, b) (for example, “piston rod r”) may not be distinguished between various cylinder devices.

  The die casting machine 3 controls the flow of hydraulic fluid from the pump 133 to the various cylinder devices to supply the hydraulic fluid to the various cylinder devices, a motor (electric motor) 135 that drives the pump 133, and the pump 133. The hydraulic circuit 137 is provided.

  The pump 133 may be a rotary pump that discharges hydraulic fluid by rotation of a rotor such as a gear pump or a vane pump, or discharges hydraulic fluid by reciprocation of a piston such as an axial plunger pump or a radial plunger pump. A plunger pump may be used. In addition, the pump 133 may be a fixed capacity pump or a variable capacity pump in which the discharge amount in one cycle of movement of the rotor or piston may be fixed. The pump 133 only needs to be able to discharge the hydraulic fluid in one direction, but the structure may be the same as that of the bidirectional (two-way) pump.

  For example, the pump 133 sucks and discharges the hydraulic fluid stored in the individual tank 33 through the filter 141. On the discharge side of the pump 133, for example, a first check valve 157 that allows the flow of hydraulic fluid from the pump 133 to various cylinder devices and prohibits the flow in the opposite direction is provided.

  Although not particularly illustrated, the motor 135 includes a stator that constitutes one of a field and an armature, and a rotor that constitutes the other of the field and the armature and rotates with respect to the stator. The motor 135 may be a direct current motor or an alternating current motor. The motor 135 is constituted by, for example, a servo motor. That is, the motor 135 is provided with a motor sensor 143 such as an encoder that detects the rotation of the motor 135, and the motor is driven by a servo driver (servo amplifier) 145 (see FIG. 9) based on the detected value of the motor sensor 143. 135 feedback control is performed.

  The hydraulic circuit 137 corresponds to various cylinder devices (115, 119, 125, and 129), the mold clamping side direction control valve 147A, the core side direction control valve 147B, the injection side direction control valve 147C, and the extrusion side direction. It has a control valve 147D (hereinafter simply referred to as “directional control valve 147”, which may not be distinguished).

  The direction control valve 147 allows or prohibits the flow of hydraulic fluid from the pump 133 to various cylinder devices, and switches the supply destination of hydraulic fluid from the pump 133 between the rod side chamber a and the head side chamber b. Is possible. The direction control valve 147 is constituted by, for example, a 4-port 3-position switching valve. Specifically, it is as follows.

  The direction control valve 147 cuts off the connection between the pump 133 and the individual tank 33 and the head side chamber b and the rod side chamber a at the center position (neutral position) among the three positions indicated by the three rectangular symbols. . Thereby, the supply of the hydraulic fluid from the pump 133 to the head side chamber b and the rod side chamber a is prohibited.

  The direction control valve 147 connects the pump 133 and the head side chamber b at the position on the left side of the paper (the right side of the paper in the injection cylinder device 125) among the three positions indicated by the three rectangular symbols. The rod side chamber a is connected. When the hydraulic fluid is supplied to the head side chamber b by the pump 133, the piston p and the piston rod r move forward in the direction protruding from the cylinder tube t. The hydraulic fluid in the rod side chamber a is pushed out by the piston p and flows into the individual tank 33.

  The directional control valve 147 connects the pump 133 and the rod side chamber a at the position on the right side of the paper (left side of the paper in the injection cylinder device 125) among the three positions indicated by the three rectangular symbols. The head side chamber b is connected. When the hydraulic fluid is supplied to the rod side chamber a by the pump 133, the piston p and the piston rod r move backward. The hydraulic fluid in the head side chamber b is pushed out by the piston p and flows into the individual tank 33.

  The direction control valve 147 is configured so that the position is switched when an electromagnetic control mechanism is operated, for example, and is switched according to an input electrical signal. The mold clamping side direction control valve 147A, the core side direction control valve 147B, and the extrusion side direction control valve 147D have only an electromagnetic control mechanism as a control mechanism, and the injection side direction control valve 147C has an electromagnetic type. The control mechanism may be appropriately configured according to required performance, such as a control mechanism in which the control mechanism and the hydraulic control mechanism sequentially operate.

  The pump 133 and the directional control valve 147 of various cylinder devices are connected by the flow path extending from the pump 133 branching corresponding to the various cylinder devices and reaching the directional control valve 147. Similarly, the individual tank 33 and the direction control valve 147 of various cylinder devices are connected by a flow path extending from the individual tank 33 branching corresponding to the various cylinder devices and reaching the direction control valve 147. ing. However, the flow path connecting the individual tank 33 and the direction control valve 147 of various cylinder devices may be individually formed in some cylinder devices or in all cylinder devices. In each cylinder device, a cooler 149 for cooling the hydraulic fluid is provided in a flow path through which the hydraulic fluid pushed out to the piston p flows to the individual tank 33.

  FIG. 9 is a diagram showing details of the configuration related to the injection cylinder device 125 in the hydraulic pressure device 130 shown in FIG. 8 and an individual control device 59 that controls the hydraulic pressure device 130. In FIG. 9, for convenience of illustration, the individual tanks 33 are shown in two places.

  The hydraulic device 130 of the die casting machine 3 further includes an accumulator 153 that can hold the hydraulic fluid to which pressure is applied in order to supply the hydraulic fluid to the injection cylinder device 125.

  The accumulator 153 is constituted by, for example, a gas pressure type cylinder (piston type) accumulator. That is, the accumulator 153 includes a cylinder tube 153e and a piston 153f that can slide the cylinder tube 153e. The inside of the cylinder tube 153e is partitioned by a piston 153f into an air chamber 153g in which a compressed gas (for example, nitrogen) is accommodated and a liquid chamber 153h in which a working fluid is accommodated. For example, the accumulator 153 is disposed above the injection cylinder device 125.

  The hydraulic circuit 137 includes a first flow path 155 that connects the pump 133 and the accumulator 153, and enables the pump 133 to accumulate (fill) the accumulator 153. The first flow path 155 is provided with a second check valve 159 that allows the flow from the pump 133 to the accumulator 153 and prohibits the flow in the opposite direction.

  As described above, the hydraulic circuit 137 connects the pump 133 and the injection cylinder device 125, and enables the injection cylinder device 125 to be driven by the pump 133. Specifically, the hydraulic circuit 137 includes a second flow path 161 connected to the pump 133, a third flow path 163 connected to the rod side chamber 125a of the injection cylinder device 125, and a head side chamber of the injection cylinder device 125. And a fourth flow path 165 connected to 125b.

  For example, the second flow path 161 is branched from the first flow path 155 between the first check valve 157 and the second check valve 159 (a part of the first flow path 155 is made common). Connected to the pump 133. The injection side direction control valve 147C described above switches the connection state between the second flow path 161 (pump 133), the third flow path 163 (rod side chamber 125a), and the fourth flow path 165 (head side chamber 125b).

  A flow path connecting the pump 133 and a cylinder apparatus other than the injection cylinder apparatus 125, for example, a tenth flow path 193 (FIG. 8) connecting the pump 133 and the clamping cylinder apparatus 115 is also a first check. The first flow path 155 branches off between the valve 157 and the second check valve 159.

  The hydraulic circuit 137 connects the accumulator 153 and the injection cylinder device 125, and enables the injection cylinder device 125 to be driven by the accumulator 153. Specifically, it is as follows.

  The hydraulic circuit 137 is provided in the fifth flow path 167 connecting the accumulator 153 and the head side chamber 125b of the injection cylinder device 125, and the fifth flow path 167, and allows or prohibits the flow from the accumulator 153 to the head side chamber 125b. Possible supply control valve 169.

  For example, the fifth channel 167 is connected to the accumulator 153 by being connected to the first channel 155 on the accumulator 153 side of the second check valve 159. The fifth channel 167 may be connected to the accumulator 153 separately from the first channel 155 (part of the first channel 155 may not be shared).

  For example, the supply control valve 169 is closed when the pilot pressure is introduced, and allows the flow from the accumulator 153 side to the head side chamber 125b side while the pilot pressure is not introduced, while the head side chamber 125b. The pilot type check valve is configured to prohibit the flow from the side to the accumulator 153 side. Therefore, when the introduction of the pilot pressure to the supply control valve 169 is stopped, the working fluid is supplied from the accumulator 153 to the head side chamber 125b, and the injection piston 125p and the piston rod 125r advance to the left side of the drawing.

  The hydraulic circuit 137 has a meter-out circuit for controlling the injection cylinder device 125 when hydraulic fluid is being supplied from the accumulator 153 to the head side chamber 125b. Specifically, for example, the hydraulic circuit 137 includes a sixth flow path 171 that connects the rod side chamber 125a and the individual tank 33, and an injection-side flow control valve 173 that controls the flow rate of the sixth flow path 171. doing.

  The injection-side flow rate control valve 173 is configured by, for example, a servo valve that is incorporated in a servo mechanism and can modulate the flow rate steplessly according to an input signal. The injection-side flow rate control valve 173 is configured to change the flow rate setting value by sequentially operating, for example, an electromagnetic control mechanism and a hydraulic control mechanism.

  The injection-side flow rate control valve 173 controls the flow rate of the hydraulic fluid discharged from the rod-side chamber 125a of the injection cylinder device 125, thereby controlling the speeds of the injection piston 125p and the piston rod 125r of the injection cylinder device 125. .

  The hydraulic circuit 137 includes a seventh flow path 175 that connects the accumulator 153 and the rear chamber 125 d of the injection cylinder device 125, and a pressure increase side flow control valve 177 provided in the seventh flow path 175.

  The seventh flow path 175 is connected to the accumulator 153 by being connected to the first flow path 155 on the accumulator 153 side of the second check valve 159, for example. The seventh flow path 175 may be connected to the accumulator 153 separately from the first flow path 155 (part of the first flow path 155 may not be shared).

  The pressure-increasing side flow control valve 177 is configured by, for example, a servo valve that is incorporated in a servo mechanism and capable of steplessly modulating the flow rate according to an input signal. The pressure increase side flow rate control valve 177 is configured to change the set value of the flow rate by sequentially operating, for example, an electromagnetic control mechanism and a hydraulic control mechanism.

  By supplying the hydraulic fluid from the accumulator 153 to the rear chamber 125d through the seventh flow path 175, the pressure in the head chamber 125b is increased through the pressure-increasing piston 125pp. At this time, the speed of pressure increase is controlled by the pressure increase side flow control valve 177.

  The hydraulic circuit 137 has an eighth flow path 179 that connects the front chamber 125 c to the individual tank 33 and the pump 133. For example, the eighth flow path 179 is connected to the third flow path 163, and is connected to the sixth flow path 171 on the rod side chamber 125 a side with respect to the injection-side flow rate control valve 173.

  Accordingly, when the hydraulic fluid in the accumulator 153 is supplied to the rear chamber 125d and the pressure-increasing piston 125pp moves forward, the hydraulic fluid in the front chamber 125c is discharged to the individual tank 33 by opening the injection side flow control valve 173. . Further, when the injection side direction control valve 147C is switched to the position on the left side in FIG. 9 and hydraulic fluid is supplied from the pump 133 to the rod side chamber 125a and the injection piston 125p moves backward, the pump 133 also returns to the front chamber 125c. The hydraulic fluid is supplied, and the pressure-increasing piston 125pp also moves backward.

  The hydraulic circuit 137 includes a ninth flow path 181 that connects the rear chamber 125 d and the individual tank 33, and a third check valve 182 provided in the ninth flow path 181. For example, the ninth channel 181 is connected to the fourth channel 165. The third check valve 182 is provided to allow the flow from the rear chamber 125d side to the injection side direction control valve 147C side, while prohibiting the flow from the injection side direction control valve 147C side to the rear chamber 125d side. It has been.

  Therefore, when the injection side direction control valve 147C is switched to the position on the left side of FIG. 9 and hydraulic fluid is supplied from the pump 133 to the front chamber 125c and the pressure increasing piston 125pp moves backward, the hydraulic fluid in the rear chamber 125d is It is discharged to the individual tank 33 through the nine flow paths 181. On the other hand, when the injection side direction control valve 147C is switched to the position on the right side of FIG. 9 and hydraulic fluid is supplied from the pump 133 to the head side chamber 125b and the injection piston 125p moves forward, the third check valve The flow from the pump 133 to the rear chamber 125d is blocked by 182 and the pressure-increasing piston 125pp does not advance.

  The individual control device 59 includes, for example, a CPU 183 and a memory 184 such as a ROM or a RAM. The CPU 183 generates a control signal based on various electrical signals input via the input circuit 185, and outputs the generated control signal to various devices via the output circuit 186.

  The electrical signals input to the individual control device 59 include, for example, timing commands from the central control device 43 and position sensors 187A to 187D that detect the positions of the piston rods r of various cylinder devices (115, 119, 125, and 129). From the detection signals S1 to S4 (refer to FIG. 8; hereinafter, A to D may be omitted), the first pressure sensor 188, the second pressure sensor 189, and the third pressure sensor 190 that detect the pressure of the hydraulic fluid. Electrical signals P1 to P3, and an operation signal corresponding to a user operation from the input device 191.

  The electrical signal output from the individual control device 59 controls, for example, cycle data to the central control device 43, various valves such as the motor 135 and the directional control valve 147, and the display device 192 that presents various information to the user. Control signal.

  The position sensor 187 constitutes, for example, a magnetic or optical linear encoder together with a scale portion (not shown) provided on the piston rod r along the advancing / retreating direction of the piston rod r, and the position sensor 187 of the scale portion. The number of pulses corresponding to the amount of movement with respect to is output. The individual control device 59 can determine the position and speed of the piston rod r by counting the pulses from the position sensor 187, and thus, the member driven by the piston rod r, for example, the moving die plate 112, The positions and speeds of the child 207, the injection plunger 123, and the push pin 127 can be specified. The individual control device 59 controls the speed, output, stop position, and the like of various cylinder devices based on the detection result of the position sensor 187 at a programmed timing.

  The first pressure sensor 188 detects the discharge pressure of the pump 133. Specifically, for example, the pressure of the hydraulic fluid between the first check valve 157 and the second check valve 159 is detected. The second pressure sensor 189 detects the pressure of the working fluid in the accumulator 153. The third pressure sensor 190 detects the pressure of the hydraulic fluid in the head side chamber 125b. The pressure in the head side chamber 125b is approximately equal to the pressure (injection pressure) applied by the injection plunger 123 to the molten metal.

  The various valves (147, 157, 159, 169, 173, 177, 182) described above are accommodated in the unit housing 10 of the pump unit 9, for example. However, any or all of the valves may be disposed outside the unit housing 10. Further, as described above, the measurement values measured by various sensors are output to the centralized control device 43 as part of the cycle data.

<Operation in molding cycle of die casting machine>
The operation in the molding cycle of the die casting machine 3 will be described.
(Overview of operation during the entire molding cycle)
First, an outline of the operation in the entire molding cycle will be described.

  In the die casting machine 3, first, the core 207 is disposed on the front side of the movable mold 205 by the core cylinder device 119 in the mold open state (or the initial stage of mold closing). Next, the movable die plate 112 is driven to the fixed die plate 111 side by the mold clamping cylinder device 115, and the mold closing is performed so that the movable die 205 is brought into contact with the fixed die 203. Clamping to increase the contact pressure of the fixed mold 203 is performed. Thereafter, the injection plunger 123 is driven by the injection cylinder device 125, and the molten metal is injected and filled into the cavity Ca. When a certain period of time elapses, in other words, when the molten metal is solidified to form a molded product, the movable die plate 112 is driven to the opposite side of the fixed die plate 111 by the mold clamping cylinder device 115, and the mold opening is stopped. Done. At this time, the molded product moves together with the moving mold 205 and is released from the fixed mold 203. Then, the extrusion pin 127 is driven by the extrusion cylinder device 129, and the molded product is pushed out by the extrusion pin 127 and released from the moving mold 205.

(Injection operation)
Next, the details of the injection operation in the die casting machine 3 will be described.

  FIG. 10A is a diagram showing a change over time in the injection pressure in the die casting machine 3, and FIG. 10B is a diagram showing a change over time in the injection speed (speed of the injection plunger 123) in the die casting machine 3. FIG. .

In the die casting machine 3, when the mold closing and clamping of the main mold 201 are completed and the molten metal is supplied into the sleeve 121, the injection plunger 123 starts moving forward, and low speed injection is performed. In the low-speed injection, the injection plunger 123 moves forward at a relatively low speed V _L in order to prevent air from being caught by the molten metal. Incidentally, the injection pressure at which the injection plunger 123 is advanced at a speed V _L is a relatively low pressure P _L.

When the injection plunger 123 reaches a predetermined high speed switching position (point D in FIG. 10B), the speed of the injection plunger 123 is increased from a relatively low speed V _L for the purpose of shortening the cycle time. The speed _VH is switched to high speed injection. The injection pressure when the injection plunger 123 moves forward at the speed V _H is a pressure P _H that is higher than the pressure P _L.

When the molten metal is substantially filled in the cavity Ca (L point in FIG. 10 (b)), since the molten metal loses escape being pressed by an injection plunger 123, the injection pressure is rapidly increased from the pressure P _H (pressure P _d ). At the same time, the injection speed is rapidly decelerated from the speed V _H (speed V _d ).

When high-speed injection is completed, pressure increase is started (hereinafter M point of FIG. 10 (b)), while the injection speed is even slower (velocity V _t), the injection pressure is increased (the pressure P _t). Then, the injection plunger 123 stops, the injection pressure becomes the casting pressure (final pressure) _Pmax , and the filling of the molten metal is completed. Thereafter, the injection pressure is maintained at the casting pressure _Pmax .

  In order to realize the operation as described above, the individual control device 59 controls the motor 135 and various valves as follows. Note that in the hydraulic device 130, the motor 135 may be driven as necessary or may be constantly driven, but in the following description, the motor 135 is described as being driven as necessary.

(Open mold state)
The motor 135 (pump 133) is stopped. The directional control valve 147 of the various cylinder devices (115, 119, 125, and 129) is in a neutral position (closed position). The accumulator 153 is in an accumulated state. However, the supply control valve 169, the injection side flow rate control valve 173, and the pressure increase side flow rate control valve 177 are closed, and the injection cylinder device 125 is not driven.

(Loading the core)
The individual control device 59 drives the motor 135 at a predetermined number of revolutions and switches the core side direction control valve 147B from the neutral position to the position on the left side in FIG. As a result, the hydraulic fluid is supplied from the pump 133 to the head side chamber 119b of the core cylinder device 119, and the core 207 is disposed on the front surface of the moving mold 205. When the arrangement of the core 207 is completed, the individual control device 59 returns the core side direction control valve 147B to the neutral position.

(Closing mold and clamping)
The individual control device 59 drives the motor 135 at a predetermined number of revolutions and switches the mold clamping side direction control valve 147A from the neutral position to the position on the left side in FIG. As a result, the hydraulic fluid is supplied from the pump 133 to the head side chamber 115b of the mold clamping cylinder device 115, the movable die plate 112 moves to the fixed die plate 111 side, and mold closing and mold clamping are performed.

  When the target mold clamping force is obtained, the individual control device 59 controls the mold clamping side direction control valve 147A and the motor 135 so that the mold clamping force is maintained. For example, the individual control device 59 continues the control for setting the position of the mold clamping side direction control valve 147A to the position on the left side in FIG. 8 and the control for driving the motor 135, that is, the mold clamping cylinder device by the pump 133. The supply of hydraulic fluid to 115 is continued and the clamping force is maintained. Further, for example, the individual control device 59 once returns the mold clamping side direction control valve 147A to the neutral position, and shows the position of the mold clamping side direction control valve 147A as necessary when the mold clamping force is reduced. In other words, the supply of hydraulic fluid to the mold clamping cylinder device 115 by the pump 133 is continued intermittently to maintain the mold clamping force at the target value. The mold clamping force is maintained until the molten metal injected into the cavity Ca is solidified later.

  The mold clamping force is detected by detecting an appropriate physical quantity such as, for example, the amount of extension of the tie bar 114, the amount of movement of the piston rod 115r of the mold clamping cylinder device 115, and the pressure of the head side chamber 115b of the mold clamping cylinder device 115. Is done. The individual control device 59 controls the mold clamping side direction control valve 147A and the motor 135 based on the detected mold clamping force.

(Low speed injection)
The individual control device 59 drives the motor 135 at a predetermined number of revolutions, and switches the injection-side direction control valve 147C to a position on the right side of the sheet of FIG. As a result, the hydraulic fluid is supplied from the pump 133 to the head side chamber 125b, the injection piston 125p and the piston rod 125r move forward, and the injection plunger 123 moves forward.

For example, the individual control device 59 controls the speed of the injection plunger 123 to a predetermined low speed (V _L ) based on the detection result of the position sensor 187C (performs feedback control). The speed of the injection plunger 123 is controlled by controlling the rotational speed of the motor 135, for example. When the pump 133 is a variable displacement pump, the injection plunger 123 is controlled by controlling the discharge amount in one cycle of the pump 133 or by combining the control of the discharge amount and the control of the rotation speed of the motor 135. The speed may be controlled.

(High speed injection)
When the position detected by the position sensor 187C reaches a predetermined high-speed switching position (point D in FIG. 10), the individual control device 59 opens the control for switching the injection-side direction control valve 147C to the neutral position and the supply control valve 169. Control and control to open the injection side flow rate control valve 173 are performed. As a result, the hydraulic fluid is supplied from the accumulator 153 to the head side chamber 125b, and high-speed injection is performed. The control timing of these valves is appropriately set based on a test or the like so that the transition from the low speed injection to the high speed injection is performed smoothly. The speed of the injection plunger 123 is feedback controlled so as to follow a predetermined high speed (V _H ) with a predetermined ascending curve by flow control by the injection side flow control valve 173.

  The individual control device 59 rotates the motor 135 at the number of rotations necessary for maintaining the mold clamping force from high speed injection to pressure increase. However, since the injection side direction control valve 147C is switched to the neutral position, the pump 133 and the injection cylinder device 125 are not directly linked to each other, and therefore the pump 133 has little influence on the injection speed and the like. .

(Deceleration)
When the injection plunger 123 reaches a predetermined deceleration start position (point L in FIG. 10), the individual control unit 59 controls the injection-side flow rate control so that the injection plunger 123 decelerates with a predetermined deceleration curve at a predetermined timing. The valve 173 is controlled.

(Pressure increase)
When the injection plunger 123 reaches a predetermined pressure increase start position (point M in FIG. 10), the individual control device 59 performs control to fully open the injection side flow control valve 173 and control to open the pressure increase side flow control valve 177. I do. As a result, the hydraulic fluid is supplied from the accumulator 153 to the rear chamber 125d, and the hydraulic fluid in the head side chamber 125b is pressurized by the pressure-increasing action of the pressure-increasing piston 125pp, and the molten metal in the cavity Ca is increased in pressure by the injection plunger 123. Is done. The individual control device 59 controls the pressure increase side flow control valve 177 based on the detection value of the third pressure sensor 190 so that the injection pressure rises to a predetermined casting pressure _Pmax with a predetermined pressure increase curve.

  The supply control valve 169 is self-closed when the pressure in the head side chamber 125b is increased by the pressure-increasing piston 125pp and becomes higher than the pressure in the accumulator 153. However, the pilot pressure may be introduced and closed.

(Open mold)
After a predetermined time has elapsed since the injection pressure reached the casting pressure P _max , in other words, after the molten metal filled in the cavity Ca solidifies, the individual control device 59 sets the mold clamping side direction control valve 147A in FIG. Switch from the position on the left side of the page to the position on the right side of the page. Thereby, the pressure release of the head side chamber 115b is performed, and further, the hydraulic fluid from the pump 133 is supplied to the rod side chamber 115a, and the mold opening is performed. When the movable die plate 112 reaches a predetermined mold opening position, the individual control device 59 returns the mold clamping side direction control valve 147A to the neutral position.

(Drawing out the core)
During the mold opening or after the mold opening, the individual control device 59 switches the core side direction control valve 147B from the neutral position to the right side of the drawing. Thereby, the working fluid from the pump 133 is supplied to the rod side chamber 119a, and the core 207 is pulled out from the molded product. When the core 207 is pulled out from the molded product, the individual control device 59 returns the core-side direction control valve 147B to the neutral position.

(Extrude)
After the core 207 is pulled out, the individual control device 59 switches the push-out direction control valve 147D from the neutral position to the position on the left side of the drawing. As a result, the hydraulic fluid from the pump 133 is supplied to the head side chamber 129 b, the push pin 127 is driven, and the molded product is pushed out from the moving mold 205. After that, at an appropriate time until the next mold closing starts, the individual control device 59 switches the extrusion side direction control valve 147D to the position on the right side of the drawing to retract the extrusion pin 127, and sets the extrusion side direction control valve 147D to the neutral position. Return to.

(Retraction of the injection plunger)
In other words, after the predetermined time has elapsed since the injection pressure reached the casting pressure P _max , in other words, after the molten metal filled in the cavity Ca solidifies, the individual control device 59 controls the injection side flow control valve 173 and the pressure increase side flow control. Control to close the valve 177 is performed, and the pressure holding is finished. Further, the individual control device 59 performs control for introducing a pilot pressure into the supply control valve 169. Thereafter, the individual control device 59 drives the motor 135 at a predetermined number of revolutions, and performs control to switch the injection side direction control valve 147C to the position on the left side of FIG. Thereby, the hydraulic fluid sent out by the pump 133 is supplied to the rod side chamber 125a and the front side chamber 125c, and the injection piston 125p (injection plunger 123) and the pressure increase piston 125pp are moved backward. When the backward movement of the injection piston 125p and the pressure increase piston 125pp is completed, the individual control device 59 returns the injection side direction control valve 147C to the neutral position. The retraction of the injection plunger may or may not overlap with the mold opening, the extraction of the core, and the extrusion of the molded product.

(Accumulator pressure accumulation)
When the mold opening, the extraction of the core, the retraction of the injection plunger, and the extrusion of the molded product are completed, and the direction control valve 147 of the various cylinder devices is returned to the neutral position, the individual control device 59 causes the motor 135 to rotate at a predetermined rotational speed. Drive with. As a result, the hydraulic fluid is supplied from the pump 133 to the accumulator 153 and the accumulator 153 accumulates pressure. When the accumulation pressure of the accumulator 153 is finished, the individual control device 59 stops the motor 135.

  According to the above embodiment, the molding machine system 1 includes the plurality of die casting machines 3 each having the hydraulic device 130 and the centralized tank 5 shared by the plurality of hydraulic devices 130. On the other hand, in each of the plurality of hydraulic devices 130, the required amount of hydraulic fluid increases or decreases during the molding cycle. Therefore, the hydraulic fluid required for the molding machine system 1 as a whole can be reduced by complementing the hydraulic fluid between the hydraulic devices 130 via the central tank 5.

  Each of the plurality of hydraulic devices 130 has an individual tank 33 communicated with the concentration tank 5, and the concentration tank 5 and the plurality of individual tanks 33 have the same liquid level. Therefore, for example, the working fluid can be supplied from the concentration tank 5 to the plurality of die casting machines 3 by utilizing the weight of the working fluid, and the configuration is simplified. Further, for example, the management of the liquid level only needs to be performed in the centralized tank 5, and the management is facilitated. The individual tank 33 may be smaller than the tank of the die casting machine in the molding machine system in which the concentration tank 5 is not provided.

  The molding machine system 1 includes a level sensor 29 that detects a liquid level, and a machine monitor 53 or a power monitor 51 that can display a detection value of the level sensor 29. Therefore, as described above, unified management of the liquid level of the entire molding machine system 1 becomes possible.

  In each of the plurality of die casting machines 3, an injection device 17 is provided adjacent to the mold clamping device 15 in the horizontal direction, and the individual tank 33 is located closer to the injection device 17 than the mold clamping device 15 and the injection device 17. Is arranged. In general, the injection device 17 requires more hydraulic fluid than the other parts of the die casting machine 3, and the hydraulic circuit is complicated. Therefore, by disposing the individual tank 33 at a position close to the injection device 17, the piping provided in the die casting machine 3 is reduced in size as a whole.

  The molding machine system 1 includes a main pipe 21b (22b) connected to the central tank 5, and a plurality of branch pipes 21c (22c) branched from the main pipe 21b (22b) and connected to a plurality of hydraulic devices 130. . The plurality of die casting machines 3 are arranged with the injection device 17 facing the main tube 21b (22b) and the mold clamping device 15 facing the side opposite to the main tube 21b (22b). As described above, the injection device 17 requires a relatively large amount of hydraulic fluid. By bringing such an injection device 17 close to the main pipe 21b (22b), the hydraulic fluid can be supplied efficiently and the piping can be reduced. In particular, the size can be effectively reduced by the combination with the configuration in which the pump unit 9 is arranged on the injection device 17 side.

  Each of the plurality of hydraulic devices 130 includes a pump 133 that can suck hydraulic fluid from the individual tank 33 and a motor 135 that drives the pump 133. Therefore, a high-power device for sending hydraulic fluid from the central tank 5 is not necessary, and the hydraulic fluid in the central tank 5 can be used by driving the pump 133 with electric power as required. As a result, energy consumed in the molding machine system is saved.

  In another aspect, the molding machine system 1 includes a plurality of die casting machines 3, a central power supply device 41 that supplies power to the plurality of die casting machines 3, and a central control device 43 that controls operations of the plurality of die casting machines 3. And have. Furthermore, the molding machine system 1 has a centralized casing 45 that houses both the centralized power supply device 41 and the centralized control device 43. Therefore, the power supply system and the control system for the plurality of die casting machines 3 are centrally arranged to effectively use the space and facilitate management.

  The centralized power supply device 41 is provided corresponding to the main power switch 47 capable of uniformly allowing or prohibiting the supply of power to the plurality of die casting machines 3 and the plurality of die casting machines 3, and power to the plurality of die casting machines 3. And a plurality of machine power switches 49 capable of individually permitting or prohibiting the supply. Therefore, the operation of supplying and shutting off power to each of the plurality of die casting machines 3 performed in response to the occurrence of an abnormality can be performed on the centralized control panel 7, thereby reducing the burden on the operator.

  The molding machine system 1 includes a power monitor 51 that is exposed in the central housing 45 with the display surface exposed from the central housing 45, and a central control device that receives signals from the central housing 45 and that are input according to an input operation. And a power monitor switching unit 52 that outputs to 43. The centralized control device 43 can display the power consumption of the entire plurality of die casting machines 3 or the power consumption of each of the plurality of die casting machines 3 on the power monitor 51. Further, based on the signal from the power monitor switching unit 52, the central control device 43 switches the power consumption to be displayed between the power consumption in the entire plurality of die casting machines 3 and the power consumption in each of the plurality of die casting machines 3. Furthermore, when displaying the power consumption in each of the plurality of die casting machines 3, the centralized control device 43 changes the die casting machine 3 on which the power consumption is displayed based on the signal from the power monitor switching unit 52 to the plurality of die casting machines. Switch between 3 Therefore, the operator can monitor the power consumption of the plurality of die casting machines 3 by monitoring the power monitor 51 on the centralized control panel 7, and the burden on the operator is reduced.

  The molding machine system 1 includes a machine monitor 53 that exposes a display surface from the central housing 45 and is accommodated in the central housing 45, and a central control device that exposes signals from the central housing 45 and receives signals according to input operations. And a first machine monitor switching unit 54 that outputs to 43. The centralized control device 43 can display the operation state of each of the plurality of die casting machines 3 on the machine monitor 53, and based on a signal from the first machine monitor switching unit 54, a plurality of die casting machines 3 on which the operation state is displayed can be displayed. Switch between the die-casting machines 3. Therefore, the operator can monitor the operation state of the plurality of die casting machines 3 by monitoring the machine monitor 53 on the centralized control panel 7, and the burden on the operator is reduced.

  The molding machine system 1 further includes an alarm lamp 57 and a plurality of abnormal part display lamps 58 provided corresponding to the plurality of die casting machines 3. The centralized control device 43 determines whether or not an abnormality has occurred in each of the plurality of die casting machines 3, and when determining that an abnormality has occurred, drives the alarm lamp 57 and detects an abnormality corresponding to the die casting machine 3 in which the abnormality has occurred. The location display lamp 58 is driven. Therefore, the worker can know the abnormality of the plurality of die casting machines 3 in the centralized control panel 7, and the burden on the worker is reduced.

  Each of the plurality of die casting machines 3 has a hydraulic device 130, and a centralized tank 5 shared by the plurality of hydraulic devices 130 is provided. Therefore, the effective utilization of the space by the centralized control panel 7 and the effective utilization of the space by the centralized tank 5 are combined to further reduce the size of the molding machine system 1.

(Second Embodiment)
FIG. 11 is a plan view showing an outline of a molding machine system 301 according to the second embodiment of the present invention.

  In the first embodiment, the pump unit 9 is provided in each of the plurality of die casting machines 3. Moreover, in 1st Embodiment, the pump unit 9 had the pump 133, the motor 135, various valves, and the unit housing | casing 10 which accommodates these. On the other hand, in the second embodiment, a pump unit 309 is provided in common for a plurality of die casting machines 3 (three are illustrated in FIG. 11).

  The pump unit 309 has a unit housing 310 that is shared by a plurality of die casting machines 3. The unit housing 310 accommodates a plurality of pumps 133, a plurality of motors 135, and a plurality of valve units 238 provided corresponding to the plurality of die casting machines 3. The valve unit 238 includes, for example, some of the various valves shown in FIGS. 8 and 9 (for example, the direction control valve 147).

  The molding machine system 301 has, for example, one machine row 4. In the machine row 4, the plurality of die-casting machines 3 are arranged in the direction (X direction) perpendicular to the arrangement direction (Y direction) of the plurality of die-casting machines 3 in the same manner as in the first embodiment. The devices 17 are arranged in the arrangement direction. And the pump unit 309 is arrange | positioned with respect to the machine row | line | column 4 at the injection device 17 side, for example. The valve unit 238 is disposed on the machine row 4 side of the pump unit 309.

  The concentration tank 305 is disposed below the pump unit 309 and is accommodated in the unit housing 310, for example. In the second embodiment, the concentration tank 305 may be regarded as a part of the pump unit 309. In the second embodiment, the individual tank 33 is not provided, and the suction pipe 37 and the discharge pipe 38 corresponding to each die casting machine 3 are inserted into the concentration tank 305.

  The centralized control panel 7 is disposed, for example, on the side of the pump unit 309 opposite to the machine row 4. The door part 46a faces the side opposite to the pump unit 309. Although not particularly shown, the central control panel 7 and the pump unit 309 are connected by a cable in order to drive and control the motor 135 and various valves of the pump unit 309.

  According to the above embodiment, the same effect as the first embodiment can be obtained. That is, resource saving and effective use of space can be achieved. In addition, a plurality of pumps 133 and the like corresponding to the plurality of die casting machines 3 are integrated by the pump unit 309, and the effective utilization of space and the ease of management are further promoted. By disposing the central control panel 7 adjacent to the pump unit 309, the cable connecting the central control panel 7 and the motor 135 and the like is shortened, and the space can be used more effectively.

(Modification)
In the embodiment, as the die casting machine 3 included in the molding machine system 1, an example in which each part including the mold clamping device 15 and the injection device 17 is driven by the hydraulic device 130 is illustrated. However, various die casting machines may be selected in the molding machine system. Below, the example of the die-casting machine applied to a molding machine system is performed.

(Modification 1)
FIG. 12 is a schematic diagram (corresponding to FIG. 8) showing the configuration of the hydraulic device 430 of the die casting machine according to the first modification. The schematic configuration of the die casting machine according to the first modification, excluding the hydraulic device 430, is the same as that of the die casting machine 3 shown in FIG. 7, for example. Further, description of the core drawing device 105 and the extrusion device 109 is omitted.

  The configuration of the hydraulic device 430 relating to the injection device 17 (injection cylinder device 125) is the same as that of the hydraulic device 130 shown in FIG. On the other hand, the hydraulic device 430 is different from the hydraulic device 130 in the configuration related to the mold clamping device 15 (the mold clamping cylinder device 115). That is, in the hydraulic device 430, the mold clamping cylinder device 115 is driven by the driver pack 401.

  The driver pack 401 includes a pump 403 that can deliver hydraulic fluid, a motor 405 that drives the pump 403, a tank 407 that can store hydraulic fluid, a self-supply valve circuit 409 that compensates for excess and shortage of hydraulic fluid, And a pack housing 410 for housing.

  The pump 403 is a bidirectional pump. That is, the pump 403 is switched between the first port 403a and the second port 403b between the first port 403a and the second port 403b by switching the rotating direction between the first port 403a and the second port 403b. As with the pump 133, an appropriate pump such as a rotary pump or a plunger pump may be employed as the pump 403.

  The pack housing 410 has a first connection port 401a connected to the first port 403a via the first communication path 411A, and a second connection port connected to the second port 403b via the second communication path 411B. 401b. In the driver pack 401, for example, the first connection port 401a is connected to the rod side chamber 115a, and the second connection port 401b is connected to the head side chamber 115b. Hereinafter, the first communication path 411A and the second communication path 411B are simply referred to as “communication path 411”, and the two may not be distinguished.

  The motor 405 has the same configuration as the motor 135. Although not particularly illustrated, the motor 405 is also configured as a servo motor, similar to the motor 135. The motor 405 is controlled in its rotation direction, rotation speed, and the like by the individual control device 59.

  The self-sufficiency valve circuit 409 detects the excess or deficiency when the amount of hydraulic fluid sent from one side and the amount of hydraulic fluid drawn from the other are different at the first connection port 401a and the second connection port 401b. It is for compensation. Such excess and deficiency is caused by a difference in cross-sectional area between the rod side chamber 115a and the head side chamber 115b in the mold clamping cylinder device 115.

  The self-supply valve circuit 409 includes an intermediate flow path 413 that connects the two communication paths 411 and a tank 407 that is connected to the intermediate flow path 413. Further, the self-supply valve circuit 409 is provided between the first self-supply valve 415A provided between the first communication path 411A and the tank 407, the second communication path 411B, and the tank 407 in the intermediate flow path 413. And a second self-sufficient valve 415B (hereinafter simply referred to as “self-sufficient valve 415”, which may not be distinguished from each other).

  The self-contained valve 415 is constituted by, for example, a pilot type check valve. Self-sufficient valve 415 is opened when pilot pressure is introduced. In addition, when the pilot pressure is not introduced, the self-supply valve 415 prevents the flow from the communication path 411 to the tank 407 and allows the flow from the tank 407 to the communication path 411. The first self-priming valve 415A is introduced with the pressure of the second communication passage 411B as a pilot pressure. The second self-priming valve 415B is introduced with the pressure of the first communication passage 411A as a pilot pressure.

  The self-supply valve circuit 409 operates as follows.

  When the pump 403 sucks the working fluid in the rod side chamber 115a from the first port 403a and supplies the sucked working fluid from the second port 403b to the head side chamber 115b, the second self-sufficiency valve 415B Block the flow from 411B to tank 407. On the other hand, the first self-sufficient valve 415A is opened by the pilot pressure introduced from the second communication path 411B.

  At this time, the shortage of hydraulic fluid in the pump 403 caused by the rod-side chamber 115a having a smaller cross-sectional area than the head-side chamber 115b is supplied from the hydraulic fluid in the tank 407 to the first port 403a via the first self-supply valve 415A. Is compensated.

  When the pump 403 sucks the working fluid in the head side chamber 115b from the second port 403b and supplies the sucked working fluid from the first port 403a to the rod side chamber 115a, the first self-sufficiency valve 415A Block the flow from 411A to tank 407. On the other hand, the second self-sufficient valve 415B is opened by the pilot pressure introduced from the first communication path 411A.

  At this time, the surplus hydraulic fluid in the pump 403, which is generated when the head side chamber 115b has a larger cross-sectional area than the rod side chamber 115a, is discharged to the tank 407 via the second self-supply valve 415B.

  Thus, the driver pack 401 has all the components necessary for sending hydraulic fluid to the clamping cylinder device 115 and sucking hydraulic fluid from the clamping cylinder device 115 as a unit. In other words, driving power is generated by supplying electric power to the motor 405 without supplying hydraulic fluid from another pump or tank. Therefore, it can be said that the driver pack 401 is a semi-electric drive device.

(Modification 2)
FIG. 13 is a schematic diagram illustrating a main part (mainly a mold clamping device 515) of a die casting machine 503 according to the second modification. The schematic configuration of the die casting machine according to the second modification excluding the mold clamping device 515 is the same as that of the embodiment, for example. Further, description of the core drawing device 105 and the extrusion device 109 is omitted.

  The mold clamping device 515 is constituted by a so-called composite mold clamping device, and an electric moving mechanism 513 for driving the movable die plate 512 and a mold clamping cylinder device for extending the tie bar 514 to perform mold clamping. 516.

  The moving mechanism 513 includes, for example, a motor 517, a screw shaft 518 driven by the motor 517, and a movable member 519 screwed to the screw shaft 518. The screw shaft 518 is pivotally supported by the base 520. The movable member 519 is fixed to the moving die plate 512. When the rotation of the motor 517 is converted into a translational movement in the mold opening / closing direction by the screw shaft 518 and the movable member 519, the movable die plate 512 moves in the mold opening / closing direction.

  The mold clamping cylinder device 516 includes, for example, a piston 521 housed in a fixed die plate 511 and fixed to a tie bar 514. With the end of the tie bar 514 on the moving die plate 512 side fixed to the moving die plate 512 by the half nut 522, the tie bar 514 is extended by moving the piston 521 to the opposite side of the moving die plate 512, Clamping is performed.

  In addition to those exemplified above, for example, a die-casting machine in which the entire mold clamping device, injection device, and the like are driven by an electric motor may be employed.

  The present invention is not limited to the above embodiment, and may be implemented in various aspects.

  The number and arrangement direction of the plurality of molding machines may be set as appropriate. For example, the plurality of molding machines may be arranged in a circumferential direction around the concentration tank with the injection device facing the concentration tank and the clamping device facing the opposite side of the concentration tank. In other words, the plurality of molding machines may be arranged radially around the concentration tank. When a plurality of molding machines are arranged vertically and horizontally, the number of molding machines in the machine row and the number of machine rows may be set as appropriate. The number of molding machines may be different between machine rows.

  The molding machine is not limited to a die casting machine. For example, the molding machine may be another metal molding machine, a plastic injection molding machine, or a molding machine that molds a material obtained by mixing wood powder with a thermoplastic resin or the like. Good. Further, the molding machine is not limited to horizontal mold clamping horizontal injection, and may be vertical mold clamping vertical injection or horizontal mold clamping vertical injection, for example.

  The timing command output from the centralized control panel may be a signal other than the trigger signal. For example, the centralized control panel continuously outputs a predetermined reference signal having periodicity to a plurality of molding machines, and the timing command is a signal indicating at which phase of the reference signal the sequence control should be started. There may be. The hydraulic fluid is not limited to liquid, and may be water, for example.

  The present invention may be combined with a system for supplying a molding material from a single melting furnace to a plurality of molding machines. In this case, resources and space can be further saved.

DESCRIPTION OF SYMBOLS 1 ... Molding machine system, 3 ... Die-casting machine (molding machine), 5 ... Centralized tank, 7 ... Centralized control panel, 41 ... Centralized power supply device, 43 ... Centralized control device, 45 ... Centralized housing, 130 ... Hydraulic device.

Claims (7)

A plurality of molding machines each having a hydraulic device ;
A centralized power supply for supplying power to the plurality of molding machines;
A centralized control device for controlling operations of the plurality of molding machines;
A centralized housing housing both the centralized power supply device and the centralized control device;
A centralized tank shared by a plurality of the hydraulic devices;
Have,
Each of the plurality of molding machines is
The machine body,
A relay panel for controlling the operation of the machine body by sequence control;
An operation panel for receiving user operations,
The central control device is a molding machine system that instructs the relay panel to start timing of the sequence control . The centralized power supply is
A centralized switch capable of uniformly allowing or prohibiting the supply of power to the plurality of molding machines;
A plurality of individual switches that are provided corresponding to the plurality of molding machines and individually allow or prohibit the supply of power to the plurality of molding machines;
The molding machine system according to claim 1, comprising: A power monitor that is housed in the central housing with a display surface exposed from the central housing;
A power monitor switching unit that is exposed from the central housing and outputs a signal corresponding to the input operation to the central control device;
Further comprising
The centralized control device can display power consumption in the whole of the plurality of molding machines or power consumption in each of the plurality of molding machines on the power monitor, and display based on a signal from the power monitor switching unit. When the power consumption to be switched is switched between the power consumption in the entire plurality of molding machines and the power consumption in each of the plurality of molding machines, and the power consumption in each of the plurality of molding machines is displayed, the power monitor switching unit The molding machine system according to claim 1 or 2, wherein a molding machine on which power consumption is displayed is switched between the plurality of molding machines based on a signal from. A machine monitor that is housed in the central housing with the display surface exposed from the central housing;
A machine monitor switching unit that is exposed from the central housing and outputs a signal corresponding to the input operation to the central control device;
Further comprising
The central control device can display the operation state of each of the plurality of molding machines on the machine monitor, and the molding machine that displays the operation state based on a signal from the machine monitor switching unit is configured to display the plurality of molding machines. The molding machine system according to claim 1, wherein the molding machine system is switched between machines. A first notification lamp;
A plurality of second notification lamps provided corresponding to a plurality of molding machines;
Further comprising
The centralized control device determines whether or not an abnormality has occurred in each of the plurality of molding machines, and when determining that an abnormality has occurred, drives the first notification lamp and corresponds to the molding machine in which the abnormality has occurred. The molding machine system according to claim 1, wherein the second notification lamp is driven. The centralized control apparatus, a molding machine system according to any one of claims 1 to 5 for controlling the plurality of operation of the molding machine so as to shift each other the phase of the molding cycle in the plurality of molding machines. The machine body has a mold clamping device and an injection device arranged in a horizontal direction with respect to the mold clamping device,
The plurality of molding machines are arranged to constitute a plurality of machine rows in plan view,
The molding machines of each machine row are arranged in the same direction as each other, and are arranged in a direction orthogonal to the arrangement direction of the mold clamping device and the injection device,
Between adjacent machine rows, the directions of the injection device with respect to the mold clamping device are opposite to each other,
A supply pipe for supplying hydraulic fluid from the concentration tank to the plurality of molding machines and a return pipe for returning the hydraulic fluid from the plurality of molding machines to the concentration tank are respectively directed toward the injection devices. A main pipe extending along the machine row between adjacent machine rows
The molding machine system of any one of Claims 1-6.

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