JP5335274B2 - Molding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molding machine capable of optimizing the heating/cooling timing of the mold and manufacturing high-quality moldings with high efficiency. <P>SOLUTION: A controller 9 takes in output signals s1, s2 and s3 from a mold temperature detection sensor 4 and an output signal 4s from a screw position detection sensor 5 and, when determining that the output signals s1, s2 and s3 reach predetermined values and that the output signal s4 reaches a predetermined value, outputting a heating-stop command signal s9 to the valve control unit 8 to stop supply of the heating medium from the heating medium supply unit 6 to the mold 1. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a molding machine, and in particular, a molding cycle including mold closing, mold heating, injection and holding pressure of molding material, mold cooling, mold opening, and removal of a molded product. The present invention relates to means for controlling the heating stop timing of a mold in a repetitive molding machine.

  Generally, injection molding machines, blow molding machines, thermoforming machines, etc. that mold plastic products perform product molding by repeating the above-described series of molding cycles, and the heating and cooling of the mold is performed on the mold. The heating medium supply and the cooling medium supply are controlled.

  Conventionally, as a molding system applied to this type of molding machine, there are 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 to the mold. A cooling unit that supplies a cooling medium such as water, a valve unit that switches a 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 provided in the control unit. The control means determines the detection temperature of each of the plurality of temperature detection units, and combines the detection result of the detection temperature and the time setting signal by the timer to control heating and cooling of the mold by switching the valve unit, In addition, there has been proposed one that controls the supply of a molding material into a mold (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 greatly depends on the amount of molding material filled in the mold. In the material injection and pressure holding process, a predetermined amount of molding material needs to be filled in the mold. In addition, the time required for molding in one cycle largely depends on the timing of heating and cooling of the mold. It is necessary to switch from the heating process to the cooling process in as short a time as possible on condition that a fixed amount of molding material is filled.

  However, since the molding system described in Patent Document 1 does not consider the filling amount of the molding material in the mold in the drive timing control of each part of the apparatus, a high-efficiency molded product is highly efficient using a simple control program. There is a problem that molding is difficult. That is, 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 the mold into the mold. Since the injection timing of the molding material is changed by changing the set time of the timer, in order to fill the mold with the required amount of molding material, the mold material is put into the mold according to the set time of the timer. The injection speed of the molding material must be controlled, 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 time of variation or longer, and it cannot be set to the shortest time according to the filling amount of the molding material in the mold, so it can be used for one cycle molding. It takes a long time and it is difficult to increase the productivity of the molded product.

  The present invention has been made to solve the problems of the prior art, and an object of the present invention is to optimize the heating and cooling timing of the mold so that a high-quality molded product can be molded with high efficiency. It is to provide a molding machine.

In order to solve such a problem, the present invention includes, firstly, a mold configured to be openable and closable and an injection device for injecting a molding material into the mold that is closed. A molding machine that repeats a molding cycle including heating of a mold, injection and holding pressure of a molding material, cooling of the mold, mold opening of the mold, and taking out of a molded product, and detects the temperature of the mold 1 to A plurality of mold temperature detecting means; a filling amount detecting means for detecting a filling amount of the molding material filled in the mold by the injection device; and a heating medium supply means for supplying a heating medium to the mold. A mold temperature signal output from the mold temperature detection means after a predetermined mold temperature and filling amount are set and supply of the heating medium from the heating medium supply means to the mold is started. And based on the filling amount signal output from the filling amount detecting means Control means for controlling the supply stop timing of the heating medium supplied to the mold from the heating medium supply means, the control means whether the mold temperature signal has reached the set mold temperature And determining whether the filling amount signal has reached the set filling amount, determining that the mold temperature signal has reached the set mold temperature, and When it is determined that the filling amount signal has reached the set filling amount, the heating medium supply stop signal is output to the heating medium supply unit, and the heating medium supply from the heating medium supply unit to the mold is output. In the molding machine that stops supply , the control means determines that the mold temperature signal has reached the set mold temperature, and determines that the fill amount signal has reached the set filling amount. Timer to start timing And Bei, when set delay time has elapsed the timer, the outputs a supply stop signal of the heating medium to the heating medium supply means, the supply from the heating medium supply means of the heating medium into said mold It was configured to stop.

In this way, when the supply stop timing of the heating medium supplied from the heating medium supply means to the mold is controlled based on the mold temperature and the filling amount of the molding material in the mold, the molding material into the mold Since it is possible to fill a mold with a required amount of molding material without controlling the injection speed, the control program of the molding machine can be simplified. Also, since the supply stop timing of the heating medium supplied from the heating medium supply means to the mold is directly controlled based on the filling amount of the molding material into the mold, the filling amount of the molding material into the mold As compared with the case where the heating medium supply stop timing is controlled by substituting for the set time of the timer, the heating medium supply stop timing control can be performed more strictly. By the way, depending on the molding material, the shape and size of the molded product, etc., the pressure holding process may have a significant effect on the quality of the molded product. In this case, the supply stop timing of the heating medium supplied from the heating medium supply means to the mold should be controlled on the basis of the end of the pressure holding process. In this pressure holding process, the molding material in the mold is used. Therefore, it is difficult to regulate the end timing of the pressure holding process based on the filling amount of the molding material in the mold. Therefore, the control means is provided with a timer, and when the delay time set in the timer has elapsed, a supply stop signal is output to the heating medium supply means so that the heating medium is supplied from the heating medium supply means to the mold. With the configuration to stop, by setting the holding time as a delay time in the timer, it is possible to regulate the stop timing of the heating medium based on the end of the holding pressure process, so the shape and size of the molding material or molded product It is possible to manufacture various molded products having different quality with high quality and efficiency.

The present invention is the second, the first or second molding machine, the injection apparatus includes a band heater wound on the outer periphery, a heating cylinder molding material supply hole to the required position has been established, the heating cylinder of a nozzle attached to the tip, and a rotatable and screws that are forward and backward can be disposed within the heating cylinder, the molding material supplied from the molding material supply holes by rotating the pre-Symbol screw The molding material is metered and the molding material measured from the nozzle is injected into the mold by advancing the screw, and the filling amount detection means is configured to inject the molding material from the nozzle. The screw is configured to detect that the screw has advanced to a predetermined advance position.

  The screw-type injection device having such a configuration includes a ball screw mechanism for moving the screw back and forth, and a rotation detection device such as a rotary encoder provided in a rotating portion of the ball screw mechanism. Therefore, in a molding machine equipped with this type of injection device, the advance position of the screw, that is, the filling amount of the molding material into the mold can be directly determined from the output of the rotation detection device. The supply stop timing of the heating medium supplied from the supply means to the mold can be controlled easily and at low cost.

  In the molding machine of the present invention, the control unit determines whether or not the mold temperature signal output from the mold temperature detection unit has reached a predetermined set value, and the filling amount output from the filling amount detection unit. Determining whether the signal has reached a predetermined set value, determining that the mold temperature signal has reached a predetermined set value, and determining that the filling amount signal has reached a predetermined set value, Since a supply stop signal is output to the heating medium supply means and the supply of the heating medium from the heating medium supply means to the mold is stopped, the inside of the mold is controlled without controlling the injection speed of the molding material into the mold. Therefore, it is possible to fill a necessary amount of molding material, and the control program of the molding machine can be simplified. Further, since the supply stop timing of the heating medium supplied from the heating medium supply means to the mold is directly controlled based on the filling amount of the molding material into the mold, the filling amount of the molding material into the mold is controlled. Compared with the case where the stop timing of the heating medium is controlled in place of the set time of the timer, the supply stop timing control of the heating medium can be performed more strictly, and the productivity of the molded product can be improved.

  Hereinafter, an embodiment of a molding machine according to the present invention will be described with reference to the drawings.

  FIG. 1 is a system configuration diagram of a molding machine according to the embodiment, and FIG. 2 is a block diagram of a control device provided in the molding machine according to the embodiment. As is apparent from these drawings, the molding machine of this example includes a mold 1 that can be opened and closed, a mold opening and closing device 2 that opens and closes the mold 1, and a mold 1 that is closed. An injection device 3 for injecting the molding material, one or more (three in the example of FIG. 2) mold temperature detection sensors 4 for detecting the temperature of the mold 1, and the front and rear of the screw provided in the injection device 3 Screw position detection sensor 5 for detecting the position in the advancing direction, heating medium supply device 6 for supplying a heating medium to the mold 1, cooling medium supply device 7 for supplying a cooling medium to the mold 1, and heating medium supply device 6 is a valve control unit 8 for interrupting the heating medium supplied to the mold 1 from 6 and interrupting the cooling medium supplied to the mold 1 from the cooling medium supply device 7, and a mold output from the mold temperature detection sensor 4. Mold temperature signals s1, s2, s3 and screw position detection Based on the filling amount signal s4 output from the sensor 5, the mold opening and closing device 2 opens and closes the mold 1, the injection device 3 measures and injects molding material, and the valve control unit 8 opens and closes various valves. It is mainly comprised from the control apparatus 9 which controls.

  The mold 1 includes a fixed mold 1a and a movable mold 1b. The mold opening / closing device 2 drives the movable mold in the opening / closing direction. The mold temperature detection sensor 4 is installed at a predetermined position of the fixed side mold and the movable side mold.

  The mold opening / closing device 2 has a toggle link mechanism in which one end is connected to a movable die plate to which the movable mold 1b is fixed, and the other end is connected to a tail stock disposed opposite to the movable mold 1b. It consists of a ball screw mechanism that expands and contracts the toggle link mechanism. The ball screw mechanism is composed of a nut body that is rotatably installed on a fixed portion and a screw shaft that is screwed onto the nut body. The toggle link mechanism is expanded and contracted by the corresponding amount of straight movement. The electric motor is provided with a rotation detection device such as a rotary encoder, and the start and stop of the electric motor are controlled based on an output signal from the rotation detection device. Since the toggle link mechanism and the ball screw mechanism are well-known and are not the gist of the present invention, the illustration 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.

  Reference numerals 11a and 15a in the figure are drilled 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 of the heating cylinder 15. The formed molding material supply hole is shown. Reference numeral 25a denotes a motor driver that drives and controls the measuring servo motor 21 based on a command from the control device 9, and reference numeral 25b denotes a motor that drives and controls the injection servo motor 23 based on a command from the control device 9. 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 weighing servomotor 21 is rotationally driven in a predetermined direction by the output from the motor driver 25a based on the command of the control device 9, 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 9. 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 9 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. 1 (see FIG. 1) is injected and filled, and the primary injection process is executed. In the pressure holding process subsequent to the primary injection process, the injection servo motor 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 9, whereby the set pressure holding is maintained. To the resin in the mold 1.

  The screw position detection sensor 5 is disposed in the injection servomotor 23 and detects the rotation of the output shaft of the injection servomotor 23. 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. The moving position of the screw 18 in the injection process corresponds to the filling amount of the molding material into the mold 1, so that eventually the filling amount of the molding material into the mold 1 is detected by the screw position detection sensor 5. Can be detected. The screw position detection sensor 5 includes a rotor fixed to the output shaft of the injection servo motor 23, a code plate provided on the rotor, a code plate arranged on the code plate and opposed to the code plate. It is possible to use a rotary encoder having a detector for detecting.

  The heating medium supply device 6 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 discharge 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 7 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 6 and the mold 1 and in a cooling medium supply pipe connecting the cooling medium supply apparatus 7 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 9 to intermittently supply the heating medium to the mold 1 and supply of the cooling medium.

  As shown in FIG. 1, the control device 9 includes an input unit 31 for mold temperature signals s 1, s 2, s 3 output from the mold temperature detection sensor 4 and a filling amount signal s 4 output from the screw position detection sensor 5. , A mold opening command signal s5 and a mold closing command signal s6 transmitted to the mold opening / closing device 2, a weighing command signal and an injection command signal s7 transmitted to the injection device 3, and a heating medium switching valve of the valve control unit 8 The heating start command signal s8 and the heating stop command signal s9, the output unit 32 of the cooling start command signal s10 and the cooling stop command signal s11 transmitted to the cooling medium switching valve of the valve control unit 8, and the operating condition setting storage unit 33 A measurement value storage unit 34, an operation process control unit 35, a timer 36, and a data input unit 37 for inputting required data.

  The operation condition setting storage unit 33 stores operation control conditions and various set values for each process (mold closing, metering, injection, mold opening, heating, cooling) of the molding cycle input in advance from the data input unit 37. Is stored in a rewritable manner, and in the measured value storage unit 34, measurement information of each part of the molding machine detected by the sensor group including the mold temperature detection sensor 4 and the screw position detection sensor 5 provided in each part of the molding machine is stored. 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. The driver group (not shown) is driven and controlled while referring to the state confirmation information from each part and its own timing information, and the operation of each process is executed. 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.

  Hereinafter, the drive control of each part of the molding machine by the control device 9 will be described with reference to FIG. FIG. 4 is a graph showing the change in mold temperature during the molding cycle and the execution timing of each process.

  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 9 outputs a mold closing command signal s 6 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 9 outputs a heating start command signal s8 to the valve control unit 8, and starts supplying the heating medium (steam) from the heating medium supply device 6 to the mold 1. As a result, the mold temperature rises as shown in FIG.

  When the control device 9 determines that the mold temperature has reached the injection start temperature TH, the control device 9 outputs an injection command signal s7 to the injection device 3, and starts filling of the molding material into the mold 1. The determination as to whether or not the mold temperature has reached the injection start temperature TH can be made when a plurality of mold temperature detection sensors 4 are provided in the mold 1 and a predetermined specific mold temperature detection is performed. Only the output value of the sensor 4 can be used as a reference, or the average value of the output values of the plurality of mold temperature detection sensors 4 can be used.

The heating stop command signal s9 is output from the control device 8 to the heating medium supply device 6 based on the mold temperature signals s1, s2, and s3 output from the mold temperature detection sensor 4 by the control device 9. This is performed when it is determined that the temperature has reached the injection start temperature TH and, based on the filling amount signal s4 output from the screw position detection sensor 5, it is determined that the filling amount signal s4 has reached the set filling amount. Is called. Therefore, in the molding machine of this example, the output of the heating stop command signal s9 from the control device 9 to the valve control unit 8 is in the period from the start of injection to the end of holding pressure as shown in FIG. It may be performed or may be performed simultaneously with the end of the pressure holding as shown in FIG. Thereby, sufficient filling of the molding material in the mold 1 is ensured, and molding of a high-quality molded product becomes possible.

  Note that when the heating stop command signal s9 is output from the control device 9 to the valve control unit 8 at the same time as the completion of the pressure holding (in the case of FIG. 4C), the timer 36 sets the screw position to the filling completion position. A delay time TD corresponding to the time from the advancement to the end of pressure holding is set, and when the delay time TD elapses, a heating stop command signal s9 is output from the control device 9 to the heating medium supply device 6. Can be performed.

  According to such control, since it becomes possible to control the stop timing of the heating medium supplied from the heating medium supply device 6 to the mold 1 on the basis of the end of the pressure holding process, the versatility of the molding machine is improved. Can do. That is, depending on the molding material and the shape and size of the molded product, the pressure holding process may have a significant effect on the quality of the molded product. In this case, the stop timing of the heating medium supplied from the heating medium supply device 6 to the mold 1 should be controlled with reference to the end of the pressure holding process. Since the filling amount of the molding material hardly changes, it is difficult to regulate the end timing of the pressure holding process based on the filling amount of the molding material in the mold 1. Therefore, the control device 9 is provided with a timer 36, and when the heating stop command signal s9 is output to the valve control unit 8 when the delay time TD set in the timer 36 has elapsed, the timer 36 stores the delay time. By setting the pressure time, the heating medium stop timing can be regulated based on the end of the pressure holding process, so various types of molded products with different molding materials and shapes and sizes can be manufactured with high quality and efficiency. can do.

Controller 9, as shown in FIG. 4 (e), (f) , and outputs the heating stop instruction signal s9 to the valve control unit 8 simultaneously, or after, the cooling start command signal s10 to the valve control unit 8 The cooling water supply device 7 supplies the cooling water to the mold 1 to forcibly cool the mold 1. When the mold temperature reaches a temperature TL suitable for mold opening, a mold opening command signal s5 is output to the mold opening / closing device 2 to execute a mold opening process.

  As described above, in the molding machine of this example, the heating medium supply device 6 supplies the mold 1 to the mold 1 based on the mold temperature TH and the filling amount of the molding material in the mold 1 (position of the screw 18). Since the supply stop timing of the heating medium to be controlled is controlled, it becomes possible to fill the mold with a necessary amount of the molding material without controlling the injection speed of the molding material into the mold 1, and the molding machine The control program can be simplified. Further, since the supply stop timing of the heating medium supplied from the heating medium supply device 6 to the mold 1 is directly controlled based on the filling amount of the molding material in the mold 1, the molding into the mold 1 is performed. Compared to the case where the material filling amount is replaced with the set time of the timer to control the heating medium stop timing, the heating medium stop timing control can be performed more strictly and the productivity of the molded product can be improved. .

1 is a system configuration diagram of a molding machine according to an embodiment. It is a block diagram of the control apparatus with which the molding machine which concerns on embodiment is equipped. It is sectional drawing of the injection apparatus with which the molding machine which concerns on embodiment is equipped. It is a figure which shows the heating-cooling cycle of the molding machine which concerns on embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mold 2 Mold opening / closing device 3 Injection device 4 Mold temperature detection sensor (mold temperature detection means)
5 Screw position detection sensor (filling amount detection means)
6 Heating medium supply device (heating medium supply means)
7 Cooling medium supply device (cooling medium supply means)
8 Valve control unit 9 Control device (control means)
s1, s2, s3 Mold temperature signal s4 Filling amount signal s5 Mold opening command signal s6 Mold closing command signal s7 Injection command signal s8 Heating start command signal s9 Heating stop command signal s10 Cooling start command signal s11 Cooling stop command signal

Claims (2)

A mold configured to be openable and closable and an injection device for injecting a molding material into the mold that has been closed, the mold is closed, the mold is heated, the molding material is injected and held, and the mold A molding machine that repeats a molding cycle consisting of cooling, mold opening and taking out a molded product,
One or a plurality of mold temperature detecting means for detecting the temperature of the mold, a filling amount detecting means for detecting a filling amount of the molding material filled in the mold by the injection device, and the mold A heating medium supply means for supplying a heating medium, a predetermined mold temperature and a filling amount are set, and after the supply of the heating medium from the heating medium supply means to the mold is started, the mold temperature Control means for controlling the supply stop timing of the heating medium supplied from the heating medium supply means to the mold based on the mold temperature signal output from the detection means and the filling amount signal output from the filling amount detection means And
The control means determines whether the mold temperature signal has reached the set mold temperature and determines whether the filling amount signal has reached the set filling amount, When it is determined that the mold temperature signal has reached the set mold temperature, and it is determined that the filling amount signal has reached the set filling amount, the heating medium supply means is supplied with the heating medium. In a molding machine that outputs a supply stop signal and stops the supply of the heating medium from the heating medium supply means to the mold,
A timer for starting time measurement when the control means determines that the mold temperature signal has reached the set mold temperature and determines that the fill amount signal has reached the set filling amount; When the delay time set in this timer has elapsed, the heating medium supply stop signal is output to the heating medium supply means, and the heating medium is supplied from the heating medium supply means to the mold. A molding machine characterized by stopping the operation. The molding machine according to claim 1,
The injection device includes a heating cylinder in which a band heater is wound around the outer periphery and a molding material supply hole is opened at a required position, a nozzle attached to the tip of the heating cylinder, and a rotatable rotation within the heating cylinder. A screw arranged in a possible manner, and measuring the molding material supplied from the molding material supply hole by rotating the screw, and measuring the nozzle from the nozzle by moving the screw forward A molding material is injected into the mold,
The filling machine is characterized in that, when the molding material is injected from the nozzle, the filling amount detection means detects that the screw has advanced to a predetermined advance position .

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