JP5283431B2 - Molding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molding machine capable of optimizing a heating and cooling timing of a mold and capable of molding a high-quality molded product with hitgh efficiency. <P>SOLUTION: The molding machine includes: the mold 1 which is configured openably and closably; a mold opening/closing device 2 which performs opening/closing operations of the mold 1; an injection device 3 which injects molding material into the mold 1 in the state of closure; a heating medium supply device 4 which supplies a heating medium to the mold 1; a cooling medium supply device 5 which supplies a cooling medium to the mold 1; a valve control unit 6 which performs intermission of the heating medium and intermission of the cooling medium to be supplied to the mold 1; a controller 7; and an input device 8 and a display device 9 attached to the controller 7. A mold temperature change every one cycle, a mold opening and closing speed change, an injection pressure change and an injection speed change are simultaneously displayed on the display device 9. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a molding cycle comprising a mold closing process, a mold heating process, a molding material injection process and a pressure holding process, a mold cooling process, a mold opening process, and a molded product taking process. In particular, the present invention relates to a means for monitoring the state of each part of the molding machine during each molding cycle.

  In general, a molding machine such as an injection molding machine, a blow molding machine, or a thermoforming machine that molds a plastic product, or a die casting machine that molds a metal product, molds the product by repeating the above-described series of steps. In this type of molding machine, in order to form a good product with high efficiency, it is necessary to appropriately control the mold temperature in each step.

  Conventionally, as a molding system for appropriately controlling the mold temperature, a plurality of temperature detection units arranged in each part of the mold, a heating unit for supplying a heating medium such as steam to the mold, and cooling water for the mold A cooling unit that supplies the cooling medium, a valve unit that switches the heating medium and a medium path through which the cooling medium flows, a control unit that controls switching of the valve unit, and a timer that is provided in the control unit. The means determines the detected temperature of each of the plurality of temperature detection units, combines the detection result of the detected temperature and the time setting signal by the timer, and controls the heating / cooling of the mold by switching the valve unit, and the mold. An apparatus for controlling the supply of a molding material into a mold has been proposed (see Patent Document 1).

According to the molding system described in Patent Document 1, since the valve unit is switched based on a combination of the temperature detected by the temperature detection unit and the time setting signal from the timer, the start timing of the flow of the heating medium into the mold in the heating process And the inflow stop timing, the injection start timing of the molding material into the mold in the injection process, the inflow start timing and the inflow stop timing of the cooling medium to the mold in the cooling process, etc. can be freely changed. Each process can be carried out in the optimum temperature range necessary for molding, and the stability of the quality of the molded product can be improved.
JP 2007-83502 A

  By the way, the quality of a molded product molded using this type of molding machine largely depends on the filling amount of the molding material into the mold cavity, so in order to perform molding without external defects and dimensional defects, In the molding material injection and pressure holding process, a predetermined amount of the molding material needs to be filled in the mold cavity. In addition, since the time required for molding in one cycle greatly depends on the heating and cooling timing of the mold, in order to shorten the molding time in one cycle and increase the productivity of the molded product, It is necessary to switch from the heating process to the cooling process in as short a time as possible on condition that a predetermined amount of molding material is filled.

  However, the molding system described in Patent Document 1 does not consider the filling amount of the molding material into the mold cavity in the drive timing control of each part of the apparatus. There is a problem that it is difficult to mold with high efficiency. In other words, the molding system described in Patent Document 1 includes a heating medium inflow start timing and an inflow end timing into the mold, a cooling medium inflow start timing and an inflow end timing into the mold, and molding into the mold cavity. Since the injection timing of the material is changed by changing the set time of the timer, in order to fill the mold cavity with the required amount of molding material, the mold cavity is filled according to the set time of the timer. It is necessary to control the injection speed of the molding material to the mold, and the control program of the molding machine becomes complicated. Also, the set time of the timer is experimentally obtained by repeating the change of the set time and the quality evaluation of the molded product, but since some variation occurs in the experimental data, in order to mold a good product with a high yield Because the setting time of the timer must be set to the longest variation time or longer, it cannot be set to the shortest time according to the filling amount of the molding material in the mold cavity. It takes a long time to complete, and it is difficult to increase the productivity of the molded product.

  The present invention has been made to solve such problems of the prior art, and the object of the present invention is to easily confirm the filling amount of the molding material into the mold cavity and to heat the mold. An object of the present invention is to provide a molding machine capable of optimizing the cooling timing and capable of molding a high-quality molded product with high efficiency.

In order to solve such a problem, the present invention firstly, a mold configured to be openable and closable, a mold opening / closing means for opening and closing the mold, and a mold temperature detecting means for detecting the temperature of the mold. Injection means for injecting the molding material into the mold cavity formed by the closed mold, injection speed detection means for detecting the injection speed of the molding material into the mold cavity, and heating the mold Heating medium supply means for supplying a medium, cooling medium supply means for supplying a cooling medium to a mold, start and stop of the mold opening / closing means, the injection means, the heating medium supply means and the cooling medium supply means In a molding machine comprising: control means for controlling and repeating a predetermined molding cycle; and display means for monitoring the state of each part of the molding machine when the predetermined molding cycle is executed, the display means includes the mold temperature Detected by detection means And the temperature change of the mold that is, was constituted of displaying injection speed change at the same time of the molding material into the injection speed detecting means detected by the said mold cavity.

  The injection speed of the molding material into the mold cavity fluctuates severely for several seconds from the time when the injection command signal is output from the control means to the injection means, and then stabilizes until the time when the next injection command signal is output. The period during which the injection speed varies greatly is the injection process, and the initial stage of the stable period is the pressure holding process. Then, by monitoring the change in the injection speed in the injection process and the pressure holding process, it is possible to grasp the filling amount of the molding material into the mold cavity. Accordingly, by simultaneously displaying the change in the mold temperature and the change in the injection speed of the molding material into the mold cavity on the display means, each process including the injection process and the pressure holding process is performed at the optimal mold temperature. The operator can easily determine whether or not the heating start command signal and the heating stop command signal are output from the control unit to the heating medium supply unit, and the cooling from the control unit to the cooling medium supply unit. Appropriateness of the output timings of the start command signal and the cooling stop command signal can be determined, and if they are not appropriate, they can be easily corrected.

  Thus, when the operator determines the filling amount of the molding material into the mold and corrects the supply stop timing of the heating medium and the supply stop timing of the cooling medium supplied to the mold from the heating medium supply means, Since it is possible to fill the mold with the required amount of molding material without controlling the injection speed according to the amount of molding material filled in the mold, the control program for the molding machine is simplified. be able to. In addition, from the change in the injection speed of the molding material into the mold cavity displayed on the display means, the operator directly determines the filling amount of the molding material into the mold and the heating supplied to the mold Since the supply stop timing of the medium and the supply stop timing of the cooling medium are corrected, the filling amount of the molding material in the mold is replaced with the set time of the timer, and the supply stop timing of the heating medium and the supply stop timing of the cooling medium are changed. These controls can be performed more strictly than in the case of control.

Secondly, the present invention provides a mold that can be opened and closed, a mold opening and closing means that performs opening and closing operations of the mold, a mold temperature detecting means that detects the temperature of the mold, and a mold that is closed Injection means for injecting the molding material into the mold cavity formed by the above, injection pressure detection means for detecting the injection pressure of the molding material into the mold cavity, and heating medium supply means for supplying the heating medium to the mold A cooling medium supply means for supplying a cooling medium to the mold, and a predetermined molding cycle by controlling activation and stop of the mold opening / closing means, the injection means, the heating medium supply means and the cooling medium supply means. In a molding machine including a repeating control unit and a display unit for monitoring the state of each part of the molding machine when the predetermined molding cycle is executed, the display unit detects the mold detected by the mold temperature detection unit. Mold temperature change and And the configuration of simultaneously displaying the injection pressure change of the molding material to said detected mold cavity by the injection pressure detecting means.

  The injection pressure of the molding material into the mold cavity reaches a peak in a short time from the output of the injection command signal from the control means to the injection means, and thereafter, the pressure is reduced in multiple stages to become a stable state. Continue until the next injection command signal is output. The period from when the injection pressure starts to rise to the stable state is the injection process, and the initial stage of the stable period is the pressure holding process. If the change in injection pressure in the primary injection process and the pressure holding process is monitored, the filling amount of the molding material in the mold cavity can be grasped. Therefore, by displaying simultaneously the temperature change of the mold and the injection pressure change of the molding material into the mold cavity on the display means, each process including the injection process and the pressure holding process is performed at the optimal mold temperature. Since the operator can easily determine whether or not the control timing of the heating medium supply unit and the control timing of the cooling medium supply unit is appropriate as in the case of monitoring the injection speed described above. If they are not suitable, they can be easily modified. Therefore, the control program of the molding machine can be simplified, and the heating medium supply stop timing and the cooling medium supply stop timing to the mold can be more strictly controlled.

Thirdly, the present invention provides a mold configured to be openable and closable, a mold opening and closing means for performing an opening and closing operation of the mold, a mold opening and closing speed detecting means for detecting a mold opening and closing speed, and a mold temperature. A mold temperature detecting means for detecting a mold, an injection means for injecting a molding material into a mold cavity formed by a closed mold, a heating medium supply means for supplying a heating medium to the mold, and a mold A cooling medium supply means for supplying a cooling medium to the mold, and a control means for controlling the start and stop of the mold opening / closing means, the injection means, the heating medium supply means and the cooling medium supply means to repeat a predetermined molding cycle. In the molding machine provided with a display means for monitoring the state of each part of the molding machine when the predetermined molding cycle is executed, the temperature change of the mold detected by the mold temperature detection means on the display means And mold opening / closing speed detection And the configuration of displaying the mold opening and closing speed variation of the mold which is simultaneously detected by the stage.

  After the mold opening command signal is output from the control means to the mold opening / closing means, the mold opening speed is increased in multiple stages to reach a peak, and then decelerated in multiple stages to become a stable state. Continue until the next mold opening command signal is output. The mold closing speed is the same as this, and after the mold closing command signal is output from the control means to the mold opening / closing means, the speed is increased in multiple stages to reach a peak, and then decelerated in multiple stages to a stable state. The stable state continues until the next mold closing command signal is output. Since the time from the output of the mold opening command signal or the output of the mold closing command signal to the end of the injection process or the start of the pressure holding process is known, at the end of the injection process or the start of the pressure holding process, As a result, the filling amount of the molding material into the mold can be known by monitoring the change in the mold opening / closing speed displayed on the display means. Therefore, by simultaneously displaying the change in mold temperature and the change in mold opening / closing speed on the display means, the operator can determine whether each process including the injection process and the pressure holding process has been performed at the optimal mold temperature. Since it can be easily determined, it is possible to determine whether the control timing of the heating medium supply means and the control timing of the cooling medium supply means are appropriate. If they are not appropriate, they can be easily corrected. . Therefore, the control program of the molding machine can be simplified, and the heating medium supply stop timing and the cooling medium supply stop timing to the mold can be more strictly controlled.

Fourthly, the present invention provides a mold configured to be openable and closable, mold opening and closing means for opening and closing the mold, mold opening and closing speed detecting means for detecting the mold opening and closing speed, and mold temperature. Mold temperature detecting means for detecting the mold, injection means for injecting the molding material into the mold cavity formed by the closed mold, and injection speed for detecting the injection speed of the molding material into the mold cavity Detection means, injection pressure detection means for detecting the injection pressure of the molding material into the mold cavity, heating medium supply means for supplying a heating medium to the mold, and cooling medium supply means for supplying a cooling medium to the mold And a control means for controlling the start and stop of the mold opening / closing means, the injection means, the heating medium supply means and the cooling medium supply means to repeat a predetermined molding cycle, and when the predetermined molding cycle is executed. The state of each part of the molding machine In a molding machine provided with a display means for cleaning, the display means includes a temperature change of the mold detected by the mold temperature detection means, and a mold die detected by the mold opening / closing speed detection means. Change in opening / closing speed, change in injection speed of molding material into the mold cavity detected by the injection speed detection means, and injection pressure of molding material into the mold cavity detected by the injection pressure detection means It was configured to display changes simultaneously .

  As described above, the mold opening / closing speed change, the injection speed change of the molding material, and the injection pressure change of the molding material, which are displayed on the display means, are respectively monitored to monitor the filling amount of the molding material into the mold cavity. Can be grasped. If these three changes are monitored at the same time, the filling amount of the molding material into the mold cavity can be grasped more accurately, so that these three changes and the temperature change of the mold can be simultaneously displayed on the display means. By displaying, the operator can easily determine whether each process including the injection process and the pressure holding process is performed at the optimum mold temperature, and the control timing of the heating medium supply means and the cooling medium supply Appropriateness of the control timing of the means can be determined. Therefore, the heating medium supply stop timing and the cooling medium supply stop timing to the mold can be more strictly controlled without complicating the control program of the molding machine.

  In the molding machine of the present invention, the display means is selected from a change in mold temperature during one molding cycle, a change in mold opening / closing speed, a change in injection speed of molding material, and a change in injection pressure of molding material during the same molding cycle. Since one or more changes are displayed at the same time, it is possible to easily grasp the filling amount of the molding material into the mold cavity, and each process including the injection process and the pressure holding process is performed at the optimum mold temperature. An operator can easily determine whether or not he / she has been received. Therefore, since the control timing of the heating medium supply means and the control timing of the cooling medium supply means can be easily optimized, the supply of the heating medium to the mold is stopped without complicating the control program of the molding machine. The timing and the cooling medium supply stop timing can be controlled more strictly, and the productivity of the molded product can be increased.

  Hereinafter, an embodiment of a molding machine according to the present invention will be described with reference to FIGS. 1 to 5. FIG. 1 is a system configuration diagram of a molding machine according to the embodiment, FIG. 2 is a configuration diagram of a mold opening / closing device provided in the molding machine according to the embodiment, and FIG. 3 is a configuration of an injection device provided in the molding machine according to the embodiment. FIG. 4 is a block diagram of a control device provided in the molding machine according to the embodiment, and FIG. 5 is a diagram showing a display screen of a monitor provided in the molding machine according to the embodiment.

  As shown in FIG. 1, the molding machine of this example includes a mold 1 configured to be openable and closable, a mold opening and closing device 2 that opens and closes the mold 1, and a molding material in the mold 1 that is closed. An injection device 3 for injecting heat, a heating medium supply device 4 for supplying a heating medium to the mold 1, a cooling medium supply device 5 for supplying a cooling medium to the mold 1, and the heating medium supply device 4 to the mold 1. A valve control unit 6 for interrupting the supplied heating medium and interrupting the cooling medium supplied from the cooling medium supply device 5 to the mold 1, a control device 7, an input device 8 attached to the control device 7, and a display The apparatus 9 is mainly configured.

  As shown in FIG. 1, the mold 1 includes a fixed mold 1 a attached to a fixed die plate 41 and a movable mold 1 b attached to a movable die plate 42. The movable mold 1b is driven by the device 2 in the opening / closing direction. Mold temperature detection sensors 10 (see FIG. 4) are set at predetermined positions of the fixed mold 1a and the movable mold 1b, and output signals s1 and s2 of the mold temperature detection sensors 10 are respectively Are input to the input unit 31 of the control device 7.

  As shown in FIG. 2, the mold opening / closing device 2 has a toggle link in which one end is connected to the movable die plate 42 and the other end is connected to a fixed portion (tail stock) 43 disposed opposite to the movable die plate 42. It consists of a mechanism 44 and a ball screw mechanism 45 that expands and contracts the toggle link mechanism 44.

  The ball screw mechanism 45 includes a nut body (not shown) that is rotatably installed on the fixed portion 43 and a screw shaft (not shown) that is screwed to the nut body. The nut body is rotated forward by a servo motor 46 for mold opening / closing. Alternatively, by moving in the reverse direction, the movable mold 1b fixed to the movable die plate 42 is moved through the toggle link mechanism 44 by the amount of linear movement corresponding to the amount of rotation. The mold opening / closing servo motor 46 is driven by a motor drive signal output from the motor driver 47 in response to a command signal from the control device 7. The mold opening / closing servomotor 46 is provided with an encoder 48 for detecting the amount and direction of rotation of the mold opening / closing servo motor 46. The output signal s3 of the encoder 48 is, as shown in FIG. 31. The mold opening / closing servomotor 46 is mechanically connected to the movable mold 1b via the ball screw mechanism 45, the toggle link mechanism 44, and the movable die plate 42. By detecting the direction with the encoder 48, the position of the movable mold 1b can be directly detected.

  Note that the toggle link mechanism 44 and the ball screw mechanism 45 are well known and are not the gist of the present invention, and thus detailed description thereof is omitted.

  As shown in FIG. 3, the injection device 3 includes a head stock 11 and a support plate 12 that are arranged on a not-shown injection unit base board and facing each other at a predetermined distance, and the head stock 11 and the holding plate 12. The connecting bar 13 spanned between, the linear motion block 14 guided back and forth between the head stock 11 and the holding plate 12 guided by the connecting bar 13, and the base end portion are fixed to the head stock 11. A heating cylinder 15, a nozzle 16 attached to the tip of the heating cylinder 15, a band heater 17 wound around the outer periphery of the heating cylinder 15, and a screw disposed in the heating cylinder 15 so as to be rotatable and movable forward and backward. 18. A base end portion of the screw 18 is held by a rotating body 19, and the rotating body 19 is rotatably held by the linear motion block 14 via a bearing. Further, a driven pulley 20 is fixed to the rotating body 19, and this driven pulley 20 is connected to a driving pulley 22 fixed to the output shaft of a measuring servo motor 21 mounted on the linear motion block 14. Further, a timing belt (not shown) is looped around. Accordingly, the screw 18 is rotationally driven by the measuring servo motor 21 via the driving pulley 22, a timing belt (not shown), the driven pulley 20, and the rotating body 19.

  An injection servomotor 23 is mounted on the support board 12 and a screw shaft 26 of the ball screw mechanism 25 is rotatably held via a bearing. The ball screw mechanism 25 includes a screw shaft 26 and a nut body 27 screwed onto the screw shaft 26, and an end portion of the nut body 27 is fixed to the linear motion block 14 via a load cell unit 28. ing. A driven pulley 29 is fixed to the end of the screw shaft 26, and a timing belt (not shown) is provided between the driven pulley 29 and a driving pulley 24 fixed to the output shaft of the injection servomotor 23. It is hung. Accordingly, the screw 18 is moved forward and backward by the injection servo motor 23 via the drive pulley 24, the timing belt (not shown), the driven pulley 29, the ball screw mechanism 25, the linear motion block 14, and the rotating body 19. The load cell unit 28 detects the injection pressure of the molten resin into the cavity of the mold 1, and the output signal s 4 of the load cell unit 28 is input to the input unit 31 of the control device 7.

  Further, an encoder 21a for detecting the rotation amount and the rotation direction is attached to the output shaft of the measuring servo motor 21, and an output signal s5 of the encoder 21a is output from the control device 7 as shown in FIG. Input to the input unit 31. Further, the output shaft of the injection servo motor 23 is provided with an encoder 23a for detecting the rotation amount and the rotation direction, and an output signal s6 of the encoder 23a is output from the control device 7 as shown in FIG. Input to the input unit 31. As described above, the output shaft of the injection servo motor 23 includes the drive pulley 24, the timing belt (not shown), the driven pulley 29, the screw shaft 26 of the ball screw mechanism 25, the nut body 27 of the ball screw mechanism 25, the load cell unit 28, and the linear motion. Since it is connected to the screw 18 via the block 14 and the rotating body 19, the movement position of the screw 18 can be detected by detecting the rotation of the output shaft of the injection servomotor 23 with the encoder 23a.

  Note that reference numerals 11a and 15a in FIG. 3 are punched at corresponding positions of the head stock 11 and the heating cylinder 15 in order to supply the molding material dropped and supplied from a hopper (not shown) into the rear end portion of the heating cylinder 15. The molding material supply hole provided is shown. Reference numeral 25a denotes a motor driver that drives and controls the metering servo motor 21 based on a command from the control device 7, and reference numeral 25b denotes a motor that drives and controls the injection servo motor 23 based on a command from the control device 7. Shows the driver.

  The injection device 3 of this example configured as described above controls the stoppage of driving of the metering servo motor 21 and the injection servo motor 23, thereby allowing the molding material supplied through the molding material supply holes 11a and 15a to be stopped. Weighing, plasticizing and kneading the measured molding material, and injection of the plasticized and kneaded molding material into the mold 1 are performed.

  That is, during the weighing process, the measuring servo motor 21 is rotationally driven in a predetermined direction by the output from the motor driver 25a based on the command of the control device 7, and the driving pulley 22, the timing belt (not shown), the driven pulley 20, and the rotating body 19 are rotated. Then, the screw 18 is rotationally driven in a predetermined direction. By the rotation of the screw 18, the raw material resin is supplied from the hopper (not shown) to the inner rear end side of the heating cylinder 15 through the raw material supply holes 11 a and 15 a. The raw material resin is transferred forward by the screw feeding action of the screw 18 while being plasticized and kneaded, and is stored as a molten resin on the front side of the screw 18. As the molten resin is fed to the front side of the screw 18, the screw 18 moves backward. At this time, the injection servomotor 23 is driven and controlled by pressure feedback control based on an output from the motor driver 25 b based on a command from the control device 7. A predetermined back pressure is applied to the screw 18 by controlling the linear movement position of the screw 18. Then, when one shot of molten resin is stored on the tip side of the screw 18, the rotational drive of the screw 18 by the measuring servo motor 21 is stopped.

  On the other hand, at the time of the injection process, the injection servomotor 23 is driven and controlled by the speed feedback control by the output from the motor driver 25b based on the command of the control device 7 at an appropriate timing after the completion of the metering. The rotation of the servo motor 23 is transmitted to the ball screw mechanism 25 via the drive pulley 24, a timing belt (not shown), and the driven pulley 29, and the ball screw mechanism 25 converts the rotary motion into a linear motion. The die 18 is rapidly driven forward by being transmitted to the screw 18 via the linear motion block 14 and the rotating body 19, and the molten resin stored on the tip side of the screw 18 is in a mold-clamping state. One cavity is injected and filled, and the primary injection process is performed. In the pressure holding process subsequent to the primary injection process, the injection servomotor 23 is driven and controlled by pressure feedback control based on the output from the motor driver 25b based on the command of the control device 7, whereby the set pressure holding is maintained. To the resin filled in the mold 1.

  The heating medium supply device 4 is a boiler that converts soft water into which a chemical such as an antiseptic is injected into steam that is a heating medium, a pump that supplies the steam generated by the boiler to the mold 1, and a pump that is discharged from the pump. It is mainly composed of a heating medium supply pipe for supplying steam to the mold 1.

  On the other hand, the cooling medium supply device 5 includes a cooling tower that generates cooling water having a water temperature of 10 ° C. to room temperature as a cooling medium by heat exchange, a pump that supplies the cooling water cooled by the cooling tower to the mold 1, and a pump And a cooling medium supply pipe for supplying cooling water discharged from the mold 1 to the mold 1.

  The control valve unit 8 is provided in a heating medium switching valve provided in a heating medium supply pipe connecting the heating medium supply apparatus 4 and the mold 1 and in a cooling medium supply pipe connecting the cooling medium supply apparatus 5 and the mold 1. The cooling medium switching valve is unitized, and each switching valve is on / off controlled by a control signal from the control device 7 to intermittently supply the heating medium to the mold 1 and supply of the cooling medium.

  As shown in FIG. 4, the control device 7 includes mold temperature signals s 1 and s 2 output from the mold temperature detection sensor 10, an output signal s 3 of an encoder 48 attached to the mold opening / closing servo motor 46, and a load cell unit 28. Output signal s4, output signal s5 of the encoder 21a attached to the output shaft of the measuring servo motor 21, output signal s6 of the encoder 23a attached to the output shaft of the injection servo motor 23, and output signal of the input device 8 The input unit 31 of s7, the mold opening command signal s11 and the mold closing command signal s12 transmitted to the mold opening / closing device 2, the weighing command signal s13 and the injection command signal s14 transmitted to the injection device 3, and the valve control unit 6 Heating start command signal s15 and heating stop command signal s16 transmitted to the heating medium switching valve, cooling medium for valve control unit 6 A cooling start command signal s17 and a cooling stop command signal s18 transmitted to the switching valve, a display signal s19 output unit 32 transmitted to the display device 9, an operating condition setting storage unit 33, a measured value storage unit 34, An operation process control unit 35, a timer 36, and a display processing unit 37 are provided.

  In the operation condition setting storage unit 33, the operation control conditions and various set values of each process (mold closing, weighing, injection, mold opening, heating, cooling) of the molding cycle input from the input device 8 are rewritten. In the measured value storage unit 34, the measurement of each part of the molding machine detected by the sensor group including the mold temperature detection sensor 10 and the load cell unit 28 and the various encoders 21a and 23a provided in each part of the molding machine is stored. Information is captured and stored in real time. The operation process control unit 35 measures the measurement information in the measurement value storage unit 34 based on the operation control program prepared for each step prepared in advance and the set value of the operation condition of each step stored in the operation condition setting storage unit 33. While referring to the status confirmation information from each part and its own timing information, the driver group (not shown) is driven and controlled to execute the operation of each process, and the display device 9 has predetermined data corresponding to the display signal s19. Is displayed.

  The timer 36 sets a delay time for delaying the heating end timing and the cooling start timing of the mold 1 as necessary, and can be omitted when it is not necessary to set the delay time.

  As shown in FIG. 5, the display device 9 includes a temperature change of the fixed mold 1a and the movable mold 1b according to the mold temperature signals s1 and s2, and a mold opening / closing speed according to the output signal s3 of the encoder 48. The change, the injection pressure change according to the output signal s4 of the load cell unit 28, and the injection speed change according to the output signal s6 of the encoder 23a are displayed for each molding cycle.

  Hereinafter, drive control of each part of the molding machine by the control device 7 will be described with reference to FIG.

  First, after the mold 1 is in the mold open state and the molded product is taken out from the mold 1, the control device 7 outputs a mold closing command signal s 12 to the mold opening / closing device 2, and the movable side mold Start moving in the mold closing direction. At the same time, the control device 7 outputs a heating start command signal s15 to the valve control unit 6, and starts supplying the heating medium (steam) from the heating medium supply device 4 to the mold 1. This increases the mold temperature.

  When the control device 7 determines that the mold temperature has reached a preset injection start temperature, it outputs an injection command signal s10 to the injection device 3 and starts filling the mold 1 with the molding material. The determination as to whether or not the mold temperature has reached the injection start temperature can be performed based only on the output value of a predetermined specific mold temperature detection sensor 10 or two mold temperatures. The average value of the output values of the detection sensor 10 can also be used.

  The output of the heating stop command signal s16 from the control device 7 to the heating medium supply device 4 is determined based on the mold temperature signals s1 and s2 output from the mold temperature detection sensor 10 by the control device 7. It is determined that the injection start temperature has been reached, and the mold opening / closing speed change in accordance with the output signal s3, the injection pressure change in accordance with the output signal s4, and the injection speed change in accordance with the output signal s6 are seen in the mold cavity. This is performed when it is determined that a predetermined amount of molten resin is filled. Thereby, sufficient filling of the molding material into the mold cavity is ensured, and molding of a high-quality molded product becomes possible.

  The control device 7 outputs a cooling start command signal s17 to the valve control unit 6 at the same time as or after the heating stop command signal s16 is output to the valve control unit 6, and cools the mold 1 from the cooling medium supply device 5. Water is supplied to forcibly cool the mold 1. When the mold temperature reaches a temperature suitable for mold opening, a mold opening command signal s11 is output to the mold opening / closing device 2 to execute a mold opening process.

  As shown in FIG. 5, the injection speed of the molding material into the mold cavity fluctuates severely for several seconds from the output time point of the injection command signal s14 from the control device 7 to the injection device 3, and thereafter, the next injection command Stable until the output time of the signal s14. The period during which the injection speed varies greatly is the injection process, and the initial stage of the stable period is the pressure holding process. Then, by monitoring the change in the injection speed in the injection process and the pressure holding process, it is possible to grasp the filling amount of the molding material into the mold cavity. Accordingly, by simultaneously displaying the temperature change of the mold 1 and the change in the injection speed of the molding material into the mold cavity on the display device 9, each process including the injection process and the pressure holding process can be performed at the optimum mold temperature. Since the operator can easily determine whether or not it has been performed, the output timing of the heating start command signal s15 and the heating stop command signal s16 from the control device 7 to the heating medium supply device 4, and the control device 7 Appropriateness of the output timing of the cooling start command signal s17 and the cooling stop command signal s18 to the cooling medium supply device 5 can be determined. If it is not appropriate, necessary correction data is input from the input device 8, The output timing of each signal can be easily corrected.

  Thus, the operator determines the filling amount of the molding material into the mold 1, and determines the supply stop timing of the heating medium and the supply stop timing of the cooling medium supplied from the heating medium supply device 4 to the mold 1. If the correction is made, it becomes possible to fill the mold 1 with a necessary amount of the molding material without controlling the injection speed in accordance with the filling amount of the molding material into the mold 1. The program can be simplified. In addition, from the change in the injection speed of the molding material into the mold cavity displayed on the display device 9, the operator directly determines the filling amount of the molding material into the mold 1 and supplies it to the mold 1. Since the heating medium supply stop timing and the cooling medium supply stop timing are corrected, the filling amount of the molding material in the mold 1 is replaced with the set time of the timer, and the heating medium supply stop timing and the cooling medium These controls can be performed more strictly than when the supply stop timing is controlled.

  Further, as shown in FIG. 5, the injection pressure of the molding material into the mold cavity reaches a peak in a short time from the output of the injection command signal s14 from the control device 7 to the injection device 3, and thereafter, the multistage The pressure is reduced to a stable state, and the stable state continues until the next injection command signal s14 is output. The period from when the injection pressure starts to rise to the stable state is the injection process, and the initial stage of the stable period is the pressure holding process. If the change in the injection pressure in the pressure holding process is monitored, the filling amount of the molding material into the mold cavity can be grasped. Accordingly, by simultaneously displaying the temperature change of the mold 1 and the injection pressure change of the molding material into the mold cavity on the display device 9, each process including the injection process and the pressure holding process can be performed at the optimum mold temperature. Since the operator can easily determine whether or not it has been performed, whether or not the control timing of the heating medium supply device 4 and the control timing of the cooling medium supply device 5 are appropriate is the same as in the case of monitoring the injection speed described above. If they can be determined and are not appropriate, they can be easily corrected. Therefore, the control program of the molding machine can be simplified, and the heating medium supply stop timing and the cooling medium supply stop timing to the mold can be more strictly controlled.

  Furthermore, as shown in FIG. 5, after the mold opening command signal s11 is output from the control device 7 to the mold opening / closing device 2, the mold opening speed is increased in multiple stages and reaches a peak, and then the multistage speed is reached. To a stable state, and the stable state continues until the next mold opening command signal s11 is output. The mold closing speed is similar to this, and after the mold closing command signal s12 is output from the control device 7 to the mold opening / closing device 2, the speed is increased in multiple stages to reach a peak, and then decelerated in multiple stages. The stable state is reached and continues until the next mold closing command signal s12 is output. Since the time from the output of the mold opening command signal s11 or the output of the mold closing command signal s12 to the end of the injection process or the start of the pressure holding process is known, the time at the end of the injection process or the start of the pressure holding process is known. Sometimes, the filling amount of the molding material into the mold 1 can be known by monitoring the change in the mold opening / closing speed displayed on the display device 9. Therefore, by displaying simultaneously the temperature change of the mold 1 and the change of the mold opening / closing speed on the display device 9, it is possible to check whether each process including the injection process and the pressure holding process has been performed at the optimum mold temperature. Therefore, it is possible to easily determine whether or not the control timing of the heating medium supply device 4 and the control timing of the cooling medium supply device 5 are appropriate. It can be carried out. Therefore, the control program of the molding machine can be simplified, and the heating medium supply stop timing and the cooling medium supply stop timing to the mold can be more strictly controlled.

In the example shown in FIG. 5, the display device 9 displays the temperature change of the fixed mold 1a, the temperature change of the movable mold 1b, the mold opening / closing speed change, the injection pressure change, and the injection speed change. Although displayed simultaneously, the gist of the present invention is not limited to this,
(1) Display only the temperature change and injection speed change of either mold,
(2) Display only the temperature change and injection pressure change of either mold,
(3) Display only the temperature change and mold opening / closing speed change of either mold.
In this case, the above-described effects can be obtained.

1 is a system configuration diagram of a molding machine according to an embodiment. It is a block diagram of the metal mold | die opening / closing apparatus with which the molding machine which concerns on embodiment is equipped. It is a block diagram of the injection device with which the molding machine which concerns on embodiment is equipped. It is a block diagram of the control apparatus with which the molding machine which concerns on embodiment is equipped. It is a figure which shows the display screen of the monitor with which the molding machine which concerns on embodiment is equipped.

Explanation of symbols

1 Mold 2 Mold Opening / Closing Device 3 Injection Device 4 Heating Medium Supply Device 5 Cooling Medium Supply Device 6 Valve Control Unit 7 Control Device 8 Input Device 9 Display Device 10 Mold Temperature Detection Sensor 28 Load Cell Units 21a, 23a Encoder 48 Encoder

Claims (4)

A mold cavity formed by a mold configured to be opened and closed, a mold opening / closing means for opening and closing the mold, a mold temperature detecting means for detecting the temperature of the mold, and a mold closed Injection means for injecting the molding material into the mold, injection speed detection means for detecting the injection speed of the molding material into the mold cavity, heating medium supply means for supplying the heating medium to the mold, and cooling medium for the mold Cooling medium supply means for supplying the mold, control means for controlling the start and stop of the mold opening / closing means, the injection means, the heating medium supply means and the cooling medium supply means to repeat a predetermined molding cycle, and the predetermined In a molding machine provided with display means for monitoring the state of each part of the molding machine when the molding cycle of
The display means simultaneously displays the temperature change of the mold detected by the mold temperature detection means and the change in the injection speed of the molding material into the mold cavity detected by the injection speed detection means. A molding machine characterized by that. A mold cavity formed by a mold configured to be opened and closed, a mold opening / closing means for opening and closing the mold, a mold temperature detecting means for detecting the temperature of the mold, and a mold closed Injection means for injecting the molding material into the mold, injection pressure detection means for detecting the injection pressure of the molding material into the mold cavity, heating medium supply means for supplying the heating medium to the mold, and cooling medium for the mold Cooling medium supply means for supplying the mold, control means for controlling the start and stop of the mold opening / closing means, the injection means, the heating medium supply means and the cooling medium supply means to repeat a predetermined molding cycle, and the predetermined In a molding machine provided with display means for monitoring the state of each part of the molding machine when the molding cycle of
The display means simultaneously displays the temperature change of the mold detected by the mold temperature detection means and the injection pressure change of the molding material into the mold cavity detected by the injection pressure detection means. A molding machine characterized by that. Mold configured to be openable / closable, mold opening / closing means for opening / closing the mold, mold opening / closing speed detecting means for detecting the mold opening / closing speed of the mold, and mold temperature detection for detecting the temperature of the mold Means, injection means for injecting a molding material into a mold cavity formed by a closed mold, heating medium supply means for supplying a heating medium to the mold, and cooling for supplying a cooling medium to the mold Medium supply means, control means for controlling the start and stop of the mold opening / closing means, the injection means, the heating medium supply means and the cooling medium supply means to repeat a predetermined molding cycle, and the predetermined molding cycle. In a molding machine provided with display means for monitoring the state of each part of the molding machine when executed,
The temperature change of the mold detected by the mold temperature detection means and the mold opening / closing speed change detected by the mold opening / closing speed detection means are simultaneously displayed on the display means. Forming machine. Mold configured to be openable / closable, mold opening / closing means for opening / closing the mold, mold opening / closing speed detecting means for detecting the mold opening / closing speed of the mold, and mold temperature detection for detecting the temperature of the mold Means, injection means for injecting molding material into a mold cavity formed by a closed mold, injection speed detecting means for detecting injection speed of molding material into the mold cavity, and mold cavity Injection pressure detecting means for detecting the injection pressure of the molding material, heating medium supplying means for supplying a heating medium to the mold, cooling medium supplying means for supplying a cooling medium to the mold, and the mold opening / closing means Control means for controlling the start and stop of the injection means, the heating medium supply means and the cooling medium supply means to repeat a predetermined molding cycle, and states of the respective parts of the molding machine when the predetermined molding cycle is executed. Display hand to monitor In the molding machine having bets,
The display means detects the temperature change of the mold detected by the mold temperature detection means, the mold opening / closing speed change detected by the mold opening / closing speed detection means, and the injection speed detection means. The molding speed change of the molding material into the mold cavity and the injection pressure change of the molding material into the mold cavity detected by the injection pressure detecting means are simultaneously displayed. Machine.

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