JP2018167468A - Injection molding machine - Google Patents

Abstract

To provide an injection molding machine capable of efficiently using a plurality of injection devices even for applications other than multicolor molding.SOLUTION: An injection molding machine has: a first injection device that is in contact with and separated from a first injection port of a mold device and fills a molding material into a cavity space from the first injection port via a first flow path; a second injection device that is in contact with and separated from a second injection port different from the first injection port of the mold device and fills the molding material into the cavity space from the second injection port via a second flow path; a flow path opening/closing processing unit that controls an opening and closing of the first flow path and controls an opening and closing of the second flow path to open one of the first flow path and the second flow path and close the other of the first flow path and the second flow path; and a molding processing unit that controls a molding operation of filling the molding material into the cavity space from one of the first flow path and the second flow path opened by the flow path opening/closing processing unit.SELECTED DRAWING: Figure 6

Description

  The present invention relates to an injection molding machine.

  The multicolor molding apparatus described in Patent Document 1 forms a first molded product by the first injection device, and then forms the multicolor molded product by integrating the second molded product with the first molded product by the second injection device. To do.

JP-A-7-144356

  The two injection devices of the multicolor molding apparatus are used only in multicolor molding, and therefore have low versatility.

  The present invention has been made in view of the above problems, and a main object of the present invention is to provide an injection molding machine that can efficiently use a plurality of injection devices even for uses other than multicolor molding.

In order to solve the above problems, according to one aspect of the present invention,
A first injection device which is brought into contact with and separated from the first injection port of the mold apparatus and fills the cavity material from the first injection port through the first flow path;
A second injection device which is brought into contact with and separated from a second injection port different from the first injection port of the mold apparatus and fills the cavity space from the second injection port through a second flow path; ,
Controlling opening and closing of the first flow path and controlling opening and closing of the second flow path to open one of the first flow path and the second flow path and to open the first flow path and the second flow path A flow path opening / closing processing section for closing the other side of the path;
An injection molding machine comprising: a molding processing unit that controls a molding operation of filling the cavity space with a molding material from one of the first channel and the second channel opened by the channel opening / closing unit. Provided.

  According to one aspect of the present invention, there is provided an injection molding machine that can efficiently use a plurality of injection devices for applications other than multicolor molding.

It is a figure which shows the state at the time of mold opening completion of the injection molding machine by one Embodiment. It is a figure which shows the state at the time of the mold clamping of the injection molding machine by one Embodiment. It is a figure which shows the state when the 1st injection device by one Embodiment performs shaping | molding operation | movement, and a 2nd injection device performs setup. It is a figure which shows a state when the 1st injection device by one Embodiment performs setup, and a 2nd injection device performs a shaping | molding operation | movement. It is a figure which expands and shows the metal mold apparatus of FIG. It is a figure which shows the component of the control apparatus by one Embodiment with a functional block. It is a figure which shows the relationship between the remaining shot of the 1st injection device by one Embodiment, and the setup of a 2nd injection device. It is a figure which shows the operation screen used for the setting of the setup of the 2nd injection device by one Embodiment. It is a figure which shows the relationship between the remaining shot of the 2nd injection device by one Embodiment, and the setup of a 1st injection device. It is a figure which shows the operation screen used for the setting of the setup of the 1st injection device by one Embodiment. It is a figure which shows the operation screen displayed on the display apparatus by one Embodiment. It is a flowchart of the replacement process of the control apparatus by one Embodiment, Comprising: The injection apparatus used for injection molding is replaced from the 1st injection apparatus to the 2nd injection apparatus, and the flow path used for injection molding is changed from the 1st flow path to the 2nd flow path. It is a flowchart to replace. It is a flowchart of the replacement process of the control apparatus by one Embodiment, Comprising: The injection apparatus used for injection molding is replaced from a 2nd injection apparatus to a 1st injection apparatus, and the flow path used for injection molding is changed from a 2nd flow path to a 1st flow path. It is a flowchart to replace.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In each of the drawings, the same or corresponding components are denoted by the same or corresponding reference numerals, and description thereof will be omitted.

(Injection molding machine)
FIG. 1 is a diagram illustrating a state when mold opening of an injection molding machine according to an embodiment is completed. FIG. 2 is a diagram illustrating a state during mold clamping of the injection molding machine according to the embodiment. 1 to 2, the X direction, the Y direction, and the Z direction are directions perpendicular to each other. The X direction and the Y direction represent the horizontal direction, and the Z direction represents the vertical direction.

  The injection molding machine includes a mold clamping device 100, an ejector device 200, a first injection device 300, a first moving device 400, a second injection device 500 (see FIGS. 3 and 4), and a second moving device 600. (See FIGS. 3 and 4) and a control device 700. Hereinafter, each component of the injection molding machine will be described.

(Clamping device)
In the description of the mold clamping device 100, the moving direction of the movable platen 120 when the mold is closed (right direction in FIGS. 1 and 2) is the front, and the moving direction of the movable platen 120 when the mold is opened (left in FIGS. 1 and 2). (Direction) will be described as the rear.

  The mold clamping apparatus 100 performs mold closing, mold clamping, and mold opening of the mold apparatus 10. The mold clamping device 100 is, for example, a horizontal mold, and the mold opening / closing direction is the horizontal direction. The mold clamping device 100 includes a fixed platen 110, a movable platen 120, a toggle support 130, a tie bar 140, a toggle mechanism 150, a mold clamping motor 160, a motion converting mechanism 170, and a mold thickness adjusting mechanism 180.

  The fixed platen 110 is fixed to the frame Fr. The fixed mold 11 is attached to the surface of the fixed platen 110 facing the movable platen 120.

  The movable platen 120 is movable in the mold opening / closing direction with respect to the frame Fr. A guide 101 for guiding the movable platen 120 is laid on the frame Fr. The movable mold 12 is attached to the surface of the movable platen 120 that faces the fixed platen 110.

  By moving the movable platen 120 forward and backward with respect to the fixed platen 110, mold closing, mold clamping, and mold opening are performed. The fixed mold 11 and the movable mold 12 constitute a mold apparatus 10.

  The toggle support 130 is connected to the fixed platen 110 at an interval, and is placed on the frame Fr so as to be movable in the mold opening / closing direction. The toggle support 130 may be movable along a guide laid on the frame Fr. The guide of the toggle support 130 may be the same as the guide 101 of the movable platen 120.

  In this embodiment, the fixed platen 110 is fixed to the frame Fr, and the toggle support 130 is movable in the mold opening / closing direction with respect to the frame Fr. However, the toggle support 130 is fixed to the frame Fr and fixed to the fixed platen. 110 may be movable in the mold opening / closing direction with respect to the frame Fr.

  The tie bar 140 connects the fixed platen 110 and the toggle support 130 with an interval L in the mold opening / closing direction. A plurality (for example, four) of tie bars 140 may be used. Each tie bar 140 is parallel to the mold opening / closing direction and extends according to the mold clamping force. At least one tie bar 140 is provided with a tie bar distortion detector 141 that detects distortion of the tie bar 140. The tie bar distortion detector 141 sends a signal indicating the detection result to the control device 700. The detection result of the tie bar distortion detector 141 is used for detecting the clamping force.

  In this embodiment, the tie bar strain detector 141 is used as a mold clamping force detector for detecting the mold clamping force, but the present invention is not limited to this. The mold clamping force detector is not limited to the strain gauge type, and may be a piezoelectric type, a capacitive type, a hydraulic type, an electromagnetic type, and the like, and the mounting position thereof is not limited to the tie bar 140.

  The toggle mechanism 150 is disposed between the movable platen 120 and the toggle support 130 and moves the movable platen 120 relative to the toggle support 130 in the mold opening / closing direction. The toggle mechanism 150 includes a cross head 151, a pair of links, and the like. Each link group includes a first link 152 and a second link 153 that are connected to each other by a pin or the like. The first link 152 is swingably attached to the movable platen 120 with a pin or the like, and the second link 153 is swingably attached to the toggle support 130 with a pin or the like. The second link 153 is attached to the crosshead 151 via the third link 154. When the crosshead 151 is moved back and forth with respect to the toggle support 130, the first link 152 and the second link 153 are bent and extended, and the movable platen 120 is moved back and forth relative to the toggle support 130.

  Note that the configuration of the toggle mechanism 150 is not limited to the configuration shown in FIGS. 1 and 2. For example, in FIGS. 1 and 2, the number of nodes in each link group is five, but four may be used, and one end of the third link 154 is coupled to the node between the first link 152 and the second link 153. May be.

  The mold clamping motor 160 is attached to the toggle support 130 and operates the toggle mechanism 150. The mold clamping motor 160 causes the first link 152 and the second link 153 to bend and extend by advancing and retracting the cross head 151 relative to the toggle support 130, and advances and retracts the movable platen 120 relative to the toggle support 130. The mold clamping motor 160 is directly connected to the motion conversion mechanism 170, but may be connected to the motion conversion mechanism 170 via a belt, a pulley, or the like.

  The motion conversion mechanism 170 converts the rotational motion of the mold clamping motor 160 into the linear motion of the cross head 151. The motion conversion mechanism 170 includes a screw shaft 171 and a screw nut 172 that is screwed onto the screw shaft 171. A ball or a roller may be interposed between the screw shaft 171 and the screw nut 172.

  The mold clamping device 100 performs a mold closing process, a mold clamping process, a mold opening process, and the like under the control of the control device 700.

  In the mold closing process, the mold clamping motor 160 is driven to advance the cross head 151 to a mold closing completion position at a set speed, thereby moving the movable platen 120 forward and touching the movable mold 12 to the fixed mold 11. The position and speed of the cross head 151 are detected using, for example, a mold clamping motor encoder 161. The mold clamping motor encoder 161 detects the rotation of the mold clamping motor 160 and sends a signal indicating the detection result to the control device 700.

  In the mold clamping process, a mold clamping force is generated by further driving the mold clamping motor 160 to further advance the cross head 151 from the mold closing completion position to the mold clamping position. A cavity space 14 is formed between the movable mold 12 and the fixed mold 11 during mold clamping, and one of the first injection device 300 and the second injection device 500 fills the cavity space 14 with a liquid molding material. . A molded product is obtained by solidifying the filled molding material. A plurality of cavity spaces 14 may be provided, and in this case, a plurality of molded products can be obtained simultaneously.

  In the mold opening process, the mold clamping motor 160 is driven to retract the cross head 151 to the mold opening completion position at a set speed, thereby retracting the movable platen 120 and separating the movable mold 12 from the fixed mold 11. Thereafter, the ejector device 200 ejects the molded product from the movable mold 12.

  Setting conditions in the mold closing process and the mold clamping process are collectively set as a series of setting conditions. For example, the speed and position (including the speed switching position, the mold closing completion position, and the mold clamping position) of the cross head 151 in the mold closing process and the mold clamping process are collectively set as a series of setting conditions. Instead of the speed and position of the cross head 151, the speed and position of the movable platen 120 may be set. Further, a mold clamping force may be set instead of the position of the cross head (for example, the mold clamping position) or the position of the movable platen.

  By the way, the toggle mechanism 150 amplifies the driving force of the mold clamping motor 160 and transmits it to the movable platen 120. The amplification magnification is also called toggle magnification. The toggle magnification changes in accordance with an angle θ formed by the first link 152 and the second link 153 (hereinafter also referred to as “link angle θ”). The link angle θ is obtained from the position of the crosshead 151. When the link angle θ is 180 °, the toggle magnification is maximized.

  When the thickness of the mold apparatus 10 changes due to replacement of the mold apparatus 10 or temperature change of the mold apparatus 10, the mold thickness adjustment is performed so that a predetermined mold clamping force can be obtained at the time of mold clamping. In the mold thickness adjustment, for example, the distance L between the fixed platen 110 and the toggle support 130 is set so that the link angle θ of the toggle mechanism 150 becomes a predetermined angle when the movable mold 12 touches the fixed mold 11. Adjust.

  The mold clamping apparatus 100 includes a mold thickness adjusting mechanism 180 that performs mold thickness adjustment by adjusting the distance L between the fixed platen 110 and the toggle support 130. The mold thickness adjusting mechanism 180 rotates a screw shaft 181 formed at the rear end portion of the tie bar 140, a screw nut 182 that is rotatably held by the toggle support 130, and a screw nut 182 that is screwed onto the screw shaft 181. And a mold thickness adjusting motor 183.

  The screw shaft 181 and the screw nut 182 are provided for each tie bar 140. The rotation of the mold thickness adjusting motor 183 may be transmitted to the plurality of screw nuts 182 via the rotation transmitting unit 185. A plurality of screw nuts 182 can be rotated synchronously. In addition, it is also possible to rotate the several screw nut 182 separately by changing the transmission path | route of the rotation transmission part 185. FIG.

  The rotation transmission unit 185 is configured with a gear, for example. In this case, a passive gear is formed on the outer periphery of each screw nut 182, a drive gear is attached to the output shaft of the mold thickness adjusting motor 183, and a plurality of passive gears and an intermediate gear that meshes with the drive gear are in the central portion of the toggle support 130. It is held rotatably. In addition, the rotation transmission part 185 may be comprised with a belt, a pulley, etc. instead of a gearwheel.

  The operation of the mold thickness adjusting mechanism 180 is controlled by the control device 700. The control device 700 drives the mold thickness adjusting motor 183 to rotate the screw nut 182, thereby adjusting the position of the toggle support 130 that rotatably holds the screw nut 182 with respect to the fixed platen 110. The interval L with the toggle support 130 is adjusted.

  In this embodiment, the screw nut 182 is rotatably held with respect to the toggle support 130, and the tie bar 140 on which the screw shaft 181 is formed is fixed with respect to the fixed platen 110. However, the present invention is not limited to this.

  For example, the screw nut 182 may be rotatably held with respect to the fixed platen 110 and the tie bar 140 may be fixed with respect to the toggle support 130. In this case, the interval L can be adjusted by rotating the screw nut 182.

  Further, the screw nut 182 may be fixed to the toggle support 130, and the tie bar 140 may be held rotatably with respect to the fixed platen 110. In this case, the interval L can be adjusted by rotating the tie bar 140.

  Furthermore, the screw nut 182 may be fixed to the fixed platen 110, and the tie bar 140 may be held rotatably with respect to the toggle support 130. In this case, the interval L can be adjusted by rotating the tie bar 140.

  The interval L is detected using a mold thickness adjusting motor encoder 184. The mold thickness adjustment motor encoder 184 detects the amount and direction of rotation of the mold thickness adjustment motor 183 and sends a signal indicating the detection result to the control device 700. The detection result of the mold thickness adjusting motor encoder 184 is used for monitoring and controlling the position and interval L of the toggle support 130.

  The mold thickness adjusting mechanism 180 adjusts the interval L by rotating one of the screw shaft 181 and the screw nut 182 that are screwed together. A plurality of mold thickness adjusting mechanisms 180 may be used, and a plurality of mold thickness adjusting motors 183 may be used.

  The mold thickness adjusting mechanism 180 of this embodiment has a screw shaft 181 formed on the tie bar 140 and a screw nut 182 screwed to the screw shaft 181 in order to adjust the interval L. It is not limited to.

  For example, the mold thickness adjusting mechanism 180 may include a tie bar temperature controller that adjusts the temperature of the tie bar 140. The tie bar temperature controller is attached to each tie bar 140 and adjusts the temperature of the plurality of tie bars 140 in cooperation with each other. As the temperature of the tie bar 140 increases, the tie bar 140 becomes longer due to thermal expansion, and the interval L increases. The temperature of the plurality of tie bars 140 can be adjusted independently.

  The tie bar temperature controller includes a heater such as a heater, and adjusts the temperature of the tie bar 140 by heating. The tie bar temperature controller may include a cooler such as a water cooling jacket, and the temperature of the tie bar 140 may be adjusted by cooling. The tie bar temperature controller may include both a heater and a cooler.

  The mold clamping device 100 of the present embodiment is a horizontal mold in which the mold opening / closing direction is the horizontal direction, but may be a vertical mold in which the mold opening / closing direction is the vertical direction. The vertical mold clamping apparatus includes a lower platen, an upper platen, a toggle support, a tie bar, a toggle mechanism, and a mold clamping motor. One of the lower platen and the upper platen is used as a fixed platen, and the other is used as a movable platen. A lower mold is attached to the lower platen, and an upper mold is attached to the upper platen. The lower die and the upper die constitute a mold apparatus. The lower mold may be attached to the lower platen via a rotary table. The toggle support is disposed below the lower platen and connected to the upper platen via a tie bar. The tie bar connects the upper platen and the toggle support at intervals in the mold opening / closing direction. The toggle mechanism is disposed between the toggle support and the lower platen, and moves the movable platen up and down. The mold clamping motor operates a toggle mechanism. When the mold clamping device is a saddle type, the number of tie bars is usually three. The number of tie bars is not particularly limited.

  The mold clamping device 100 according to the present embodiment includes the mold clamping motor 160 as a drive source, but may include a hydraulic cylinder instead of the mold clamping motor 160. The mold clamping device 100 may include a linear motor for opening and closing the mold and an electromagnet for mold clamping.

(Ejector device)
In the description of the ejector device 200, as in the description of the mold clamping device 100, the movement direction (right direction in FIGS. 1 and 2) of the movable platen 120 when the mold is closed is the front, and the movement of the movable platen 120 when the mold is opened. The direction (left direction in FIGS. 1 and 2) will be described as the rear.

  The ejector device 200 projects a molded product from the mold device 10. The ejector device 200 includes an ejector motor 210, a motion conversion mechanism 220, an ejector rod 230, and the like.

  The ejector motor 210 is attached to the movable platen 120. The ejector motor 210 is directly connected to the motion conversion mechanism 220, but may be connected to the motion conversion mechanism 220 via a belt, a pulley, or the like.

  The motion conversion mechanism 220 converts the rotational motion of the ejector motor 210 into the linear motion of the ejector rod 230. The motion conversion mechanism 220 includes a screw shaft and a screw nut that is screwed onto the screw shaft. A ball or a roller may be interposed between the screw shaft and the screw nut.

  The ejector rod 230 can be moved forward and backward in the through hole of the movable platen 120. The front end portion of the ejector rod 230 is in contact with the movable member 15 which is disposed inside the movable mold 12 so as to be able to advance and retract. The front end portion of the ejector rod 230 may or may not be connected to the movable member 15.

  The ejector device 200 performs the ejection process under the control of the control device 700.

  In the ejecting process, the ejector motor 210 is driven to advance the ejector rod 230 from the standby position to the ejecting position at a set speed, thereby moving the movable member 15 forward and ejecting the molded product. Thereafter, the ejector motor 210 is driven to retract the ejector rod 230 at a set speed, and the movable member 15 is retracted to the original standby position. The position and speed of the ejector rod 230 are detected using the ejector motor encoder 211, for example. The ejector motor encoder 211 detects the rotation of the ejector motor 210 and sends a signal indicating the detection result to the control device 700.

(First injection device)
In the description of the first injection device 300, the direction in which the first injection device 300 approaches the mold device 10 (the left direction in FIGS. 1 and 2) is the front, and the first injection device 300 is relative to the mold device 10. The direction of separating (the right direction in FIGS. 1 and 2) will be described as the rear.

  The first injection device 300 is installed on a slide base 301 that can move forward and backward relative to the frame Fr, and can move forward and backward relative to the mold device 10. The first injection device 300 touches the mold apparatus 10 and fills the cavity space 14 in the mold apparatus 10 with the molding material. The first injection device 300 includes, for example, a cylinder 310, a nozzle 320, a screw 330, a metering motor 340, an injection motor 350, a pressure detector 360, and the like.

  The cylinder 310 heats the molding material supplied to the inside from the supply port 311. The supply port 311 is formed at the rear part of the cylinder 310. A cooler 312 such as a water-cooled cylinder is provided on the outer periphery of the rear portion of the cylinder 310. In front of the cooler 312, a heater 313 such as a band heater and a temperature detector 314 are provided on the outer periphery of the cylinder 310.

  The cylinder 310 is divided into a plurality of zones in the axial direction of the cylinder 310 (the left-right direction in FIGS. 1 and 2). A heater 313 and a temperature detector 314 are provided in each zone. For each zone, the control device 700 controls the heater 313 so that the temperature detected by the temperature detector 314 becomes a set temperature.

  The nozzle 320 is provided at the front end of the cylinder 310 and is pressed against the mold apparatus 10. A heater 313 and a temperature detector 314 are provided on the outer periphery of the nozzle 320. The control device 700 controls the heater 313 so that the detected temperature of the nozzle 320 becomes the set temperature.

  The screw 330 is disposed in the cylinder 310 so as to be rotatable and movable back and forth. When the screw 330 is rotated, the molding material is fed forward along the spiral groove of the screw 330. The molding material is gradually melted by the heat from the cylinder 310 while being fed forward. As the liquid molding material is fed forward of the screw 330 and accumulated in the front of the cylinder 310, the screw 330 is retracted. Thereafter, when the screw 330 is advanced, the liquid molding material accumulated in front of the screw 330 is injected from the nozzle 320 and filled in the mold apparatus 10.

  A backflow prevention ring 331 is attached to the front portion of the screw 330 as a backflow prevention valve that prevents a backflow of the molding material from the front to the back of the screw 330 when the screw 330 is pushed forward.

  When the screw 330 is advanced, the backflow prevention ring 331 is pushed backward by the pressure of the molding material in front of the screw 330 and is relatively relative to the screw 330 to a closed position (see FIG. 2) that closes the flow path of the molding material. fall back. This prevents the molding material accumulated in front of the screw 330 from flowing backward.

  On the other hand, when the screw 330 is rotated, the backflow prevention ring 331 is pushed forward by the pressure of the molding material sent forward along the spiral groove of the screw 330 to open the flow path of the molding material. It moves forward relative to the screw 330 up to (see FIG. 1). Thereby, a molding material is sent ahead of the screw 330.

  The backflow prevention ring 331 may be either a co-rotating type that rotates with the screw 330 or a non-co-rotating type that does not rotate with the screw 330.

  The first injection device 300 may have a drive source for moving the backflow prevention ring 331 forward and backward between the open position and the closed position with respect to the screw 330.

  The weighing motor 340 rotates the screw 330. The drive source for rotating the screw 330 is not limited to the metering motor 340, and may be a hydraulic pump, for example.

  The injection motor 350 moves the screw 330 back and forth. Between the injection motor 350 and the screw 330, a motion conversion mechanism for converting the rotational motion of the injection motor 350 into the linear motion of the screw 330 is provided. The motion conversion mechanism includes, for example, a screw shaft and a screw nut that is screwed onto the screw shaft. A ball, a roller, or the like may be provided between the screw shaft and the screw nut. The drive source for moving the screw 330 back and forth is not limited to the injection motor 350, and may be a hydraulic cylinder, for example.

  The pressure detector 360 detects the pressure transmitted between the injection motor 350 and the screw 330. The pressure detector 360 is provided in a force transmission path between the injection motor 350 and the screw 330 and detects the pressure acting on the pressure detector 360.

  The pressure detector 360 sends a signal indicating the detection result to the control device 700. The detection result of the pressure detector 360 is used for control and monitoring of the pressure received by the screw 330 from the molding material, the back pressure against the screw 330, the pressure acting on the molding material from the screw 330, and the like.

  The first injection device 300 performs a filling process, a pressure holding process, a weighing process, and the like under the control of the control device 700.

  In the filling step, the injection motor 350 is driven to advance the screw 330 at a set speed, and the liquid molding material accumulated in front of the screw 330 is filled into the cavity space 14 in the mold apparatus 10. The position and speed of the screw 330 are detected using, for example, the injection motor encoder 351. The injection motor encoder 351 detects the rotation of the injection motor 350 and sends a signal indicating the detection result to the control device 700. When the position of the screw 330 reaches the set position, switching from the filling process to the pressure holding process (so-called V / P switching) is performed. A position where the V / P switching is performed is also referred to as a V / P switching position. The set speed of the screw 330 may be changed according to the position and time of the screw 330.

  In addition, after the position of the screw 330 reaches the set position in the filling process, the screw 330 may be temporarily stopped at the set position, and then V / P switching may be performed. Immediately before the V / P switching, instead of stopping the screw 330, the screw 330 may be moved forward or backward at a slow speed.

  In the pressure holding process, the injection motor 350 is driven to push the screw 330 forward, and the pressure of the molding material at the front end portion of the screw 330 (hereinafter also referred to as “holding pressure”) is maintained at a set pressure, The remaining molding material is pushed toward the mold apparatus 10. Insufficient molding material due to cooling shrinkage in the mold apparatus 10 can be replenished. The holding pressure is detected using a pressure detector 360, for example. The pressure detector 360 sends a signal indicating the detection result to the control device 700. The set value of the holding pressure may be changed according to the elapsed time from the start of the pressure holding process.

  In the pressure holding process, the molding material in the cavity space 14 in the mold apparatus 10 is gradually cooled, and when the pressure holding process is completed, the inlet of the cavity space 14 is closed with the solidified molding material. This state is called a gate seal, and the backflow of the molding material from the cavity space 14 is prevented. After the pressure holding process, the cooling process is started. In the cooling process, the molding material in the cavity space 14 is solidified. In order to shorten the molding cycle time, a metering step may be performed during the cooling step.

  In the metering step, the metering motor 340 is driven to rotate the screw 330 at a set rotational speed, and the molding material is fed forward along the spiral groove of the screw 330. Along with this, the molding material is gradually melted. As the liquid molding material is fed forward of the screw 330 and accumulated in the front of the cylinder 310, the screw 330 is retracted. The number of rotations of the screw 330 is detected by using, for example, a weighing motor encoder 341. The weighing motor encoder 341 detects the rotation of the weighing motor 340 and sends a signal indicating the detection result to the control device 700.

  In the metering step, the set back pressure may be applied to the screw 330 by driving the injection motor 350 in order to limit the rapid retreat of the screw 330. The back pressure with respect to the screw 330 is detected using, for example, a pressure detector 360. The pressure detector 360 sends a signal indicating the detection result to the control device 700. When the screw 330 is retracted to the measurement completion position and a predetermined amount of molding material is accumulated in front of the screw 330, the measurement process is completed.

  The first injection device 300 of the present embodiment is an inline screw method, but may be a pre-plastic method or the like. A pre-plastic injection device supplies a molding material melted in a plasticizing cylinder to the injection cylinder, and injects the molding material from the injection cylinder into a mold device. In the plasticizing cylinder, a screw is rotatably or rotatably and reciprocally disposed, and in the injection cylinder, a plunger is reciprocally disposed.

  Further, the first injection device 300 of the present embodiment is a horizontal type in which the axial direction of the cylinder 310 is the horizontal direction, but may be a vertical type in which the axial direction of the cylinder 310 is the vertical direction. The mold clamping device combined with the vertical mold first injection apparatus 300 may be a vertical mold or a horizontal mold. Similarly, the mold clamping device combined with the horizontal first injection device 300 may be a horizontal type or a saddle type.

(First moving device)
In the description of the first moving device 400, as in the description of the first injection device 300, the direction in which the first injection device 300 approaches the mold device 10 (the left direction in FIGS. 1 and 2) is the front, The direction in which the 1-injection apparatus 300 is separated from the mold apparatus 10 (the right direction in FIGS. 1 and 2) will be described as the rear. The first moving device 400 is arranged on one side of the cylinder 310 of the first injection device 300 in FIGS. 3 and 4, but it may be arranged on both sides of the cylinder 310, and is arranged symmetrically around the cylinder 310. May be.

  The first moving device 400 moves the first injection device 300 forward and backward with respect to the mold device 10. Moreover, the 1st moving apparatus 400 presses the nozzle 320 with respect to the metal mold | die apparatus 10, and produces a nozzle touch pressure. The first moving device 400 includes a hydraulic pump 410, a motor 420 as a drive source, a hydraulic cylinder 430 as a hydraulic actuator, and the like.

  The hydraulic pump 410 has a first port 411 and a second port 412. The hydraulic pump 410 is a bi-directionally rotatable pump, and by switching the rotation direction of the motor 420, hydraulic fluid (for example, oil) is sucked from one of the first port 411 and the second port 412 and discharged from the other. Then, hydraulic pressure is generated. The hydraulic pump 410 can also suck the working fluid from the tank and discharge the working fluid from either the first port 411 or the second port 412.

  The motor 420 operates the hydraulic pump 410. The motor 420 drives the hydraulic pump 410 with a rotation direction and a rotation torque according to a control signal from the control device 700. The motor 420 may be an electric motor or an electric servo motor.

  The hydraulic cylinder 430 includes a cylinder body 431, a piston 432, and a piston rod 433. The cylinder body 431 is fixed with respect to the first injection device 300. The piston 432 divides the interior of the cylinder body 431 into a front chamber 435 as a first chamber and a rear chamber 436 as a second chamber. The piston rod 433 is fixed to the fixed platen 110.

  The front chamber 435 of the hydraulic cylinder 430 is connected to the first port 411 of the hydraulic pump 410 via the first flow path 401. The hydraulic fluid discharged from the first port 411 is supplied to the front chamber 435 via the first flow path 401, whereby the first injection device 300 is pushed forward. The first injection device 300 is advanced, and the nozzle 320 is pressed against the fixed mold 11. The front chamber 435 functions as a pressure chamber that generates the nozzle touch pressure of the nozzle 320 by the pressure of the hydraulic fluid supplied from the hydraulic pump 410.

  On the other hand, the rear chamber 436 of the hydraulic cylinder 430 is connected to the second port 412 of the hydraulic pump 410 via the second flow path 402. The hydraulic fluid discharged from the second port 412 is supplied to the rear chamber 436 of the hydraulic cylinder 430 through the second flow path 402, whereby the first injection device 300 is pushed backward. The first injection device 300 is retracted, and the nozzle 320 is separated from the fixed mold 11.

  In the present embodiment, the first moving device 400 includes the hydraulic cylinder 430, but the present invention is not limited to this. For example, instead of the hydraulic cylinder 430, an electric motor and a motion conversion mechanism that converts the rotational motion of the electric motor into the linear motion of the first injection device 300 may be used.

(Control device)
The control device 700 includes a CPU (Central Processing Unit) 701, a storage medium 702 such as a memory, an input interface 703, and an output interface 704 as shown in FIGS. The control device 700 performs various controls by causing the CPU 701 to execute a program stored in the storage medium 702. In addition, the control device 700 receives a signal from the outside through the input interface 703 and transmits a signal to the outside through the output interface 704.

  The control device 700 repeatedly manufactures a molded product by repeatedly performing a mold closing process, a mold clamping process, a mold opening process, and the like. In addition, the control device 700 performs a weighing process, a filling process, a pressure holding process, and the like during the mold clamping process. A series of operations for obtaining a molded product, for example, operations from the start of the weighing process to the start of the next weighing process are also referred to as “shot” or “molding cycle”. The time required for one shot is also referred to as “molding cycle time”.

  The control device 700 is connected to the operation device 750 and the display device 760. The operation device 750 receives an input operation by a user and outputs a signal corresponding to the input operation to the control device 700. The display device 760 displays an operation screen corresponding to an input operation on the operation device 750 under the control of the control device 700.

  The operation screen is used for setting the injection molding machine. A plurality of operation screens are prepared and displayed by switching or overlapping. The user performs settings of the injection molding machine (including input of set values) by operating the operation device 750 while viewing the operation screen displayed on the display device 760.

  The operation device 750 and the display device 760 may be configured with a touch panel, for example, and may be integrated. In addition, although the operating device 750 and the display device 760 of this embodiment are integrated, you may provide independently. In addition, a plurality of operation devices 750 may be provided.

(Second injection device)
FIG. 3 is a diagram illustrating a state when the first injection device according to an embodiment performs a molding operation and the second injection device performs setup. FIG. 4 is a diagram illustrating a state when the first injection device according to an embodiment performs setup and the second injection device performs a molding operation. FIG. 5 is an enlarged view showing the mold apparatus of FIG.

  The first injection device 300 is brought into contact with and separated from the first injection port 21 of the mold apparatus 10 and fills the cavity space 14 from the first injection port 21 through the first flow path 22 with the molding material. Further, the second injection device 500 is brought into contact with and separated from the second injection port 23 of the mold apparatus 10, and fills the cavity space 14 from the second injection port 23 through the second flow path 24 with the molding material.

  The moving direction of the first injection device 300 is the X direction, and the moving direction of the second injection device 500 is the Y direction, but is not particularly limited. For example, the moving direction of one of the first injection device 300 and the second injection device 500 may be the Z direction.

  In the description of the second injection device 500, the direction in which the second injection device 500 approaches the mold device 10 (the downward direction in FIGS. 3 and 4) is the front, and the second injection device 500 is relative to the mold device 10. The direction to be separated (the upward direction in FIGS. 3 and 4) will be described as the rear.

  The second injection device 500 is installed on a slide base 501 that can move forward and backward with respect to the additional frame AFr provided adjacent to the frame Fr, and can move forward and backward with respect to the mold device 10. The second injection device 500 touches the mold apparatus 10 and fills the cavity space 14 in the mold apparatus 10 with the molding material. The second injection device 500 includes, for example, a cylinder 510, a nozzle 520, a screw 530, a metering motor 540, an injection motor 550, a pressure detector 560, and the like.

  The cylinder 510 heats the molding material supplied to the inside from the supply port. The supply port is formed at the rear portion of the cylinder 510. A cooler 512 such as a water-cooled cylinder is provided on the outer periphery of the rear portion of the cylinder 510. A heater 513 such as a band heater and a temperature detector 514 are provided on the outer periphery of the cylinder 510 in front of the cooler 512.

  The cylinder 510 is divided into a plurality of zones in the axial direction of the cylinder 510 (vertical direction in FIGS. 3 and 4). A heater 513 and a temperature detector 514 are provided in each zone. For each zone, the control device 700 controls the heater 513 so that the temperature detected by the temperature detector 514 becomes the set temperature.

  The nozzle 520 is provided at the front end of the cylinder 510 and is pressed against the mold apparatus 10. A heater 513 and a temperature detector 514 are provided on the outer periphery of the nozzle 520. The control device 700 controls the heater 513 so that the detected temperature of the nozzle 520 becomes the set temperature.

  The screw 530 is disposed in the cylinder 510 so as to be rotatable and advance / retreat. When the screw 530 is rotated, the molding material is fed forward along the spiral groove of the screw 530. The molding material is gradually melted by the heat from the cylinder 510 while being fed forward. As the liquid molding material is fed forward of the screw 530 and accumulated in the front of the cylinder 510, the screw 530 is retracted. Thereafter, when the screw 530 is advanced, the liquid molding material accumulated in front of the screw 530 is injected from the nozzle 520 and filled in the mold apparatus 10.

  A backflow prevention ring 531 is attached to the front portion of the screw 530 as a backflow prevention valve that prevents backflow of the molding material from the front to the back of the screw 530 when the screw 530 is pushed forward.

  When the screw 530 is moved forward, the backflow prevention ring 531 is pushed backward by the pressure of the molding material in front of the screw 530 and is relatively relative to the screw 530 to the closed position (see FIG. 4) that closes the flow path of the molding material. fall back. This prevents the molding material accumulated in front of the screw 530 from flowing backward.

  On the other hand, when the screw 530 is rotated, the backflow prevention ring 531 is pushed forward by the pressure of the molding material sent forward along the spiral groove of the screw 530 and opens the flow path of the molding material. It moves forward relative to the screw 530 until (see FIG. 3). Thereby, a molding material is sent ahead of the screw 530.

  The backflow prevention ring 531 may be either a co-rotating type that rotates with the screw 530 or a non-co-rotating type that does not rotate with the screw 530.

  Note that the second injection device 500 may have a drive source that moves the backflow prevention ring 531 forward and backward between the open position and the closed position with respect to the screw 530.

  The weighing motor 540 rotates the screw 530. The drive source for rotating the screw 530 is not limited to the metering motor 540, and may be a hydraulic pump, for example.

  The injection motor 550 moves the screw 530 back and forth. Between the injection motor 550 and the screw 530, a motion conversion mechanism that converts the rotational motion of the injection motor 550 into the linear motion of the screw 530 is provided. The motion conversion mechanism includes, for example, a screw shaft and a screw nut that is screwed onto the screw shaft. A ball, a roller, or the like may be provided between the screw shaft and the screw nut. The drive source for moving the screw 530 back and forth is not limited to the injection motor 550, and may be a hydraulic cylinder, for example.

  The pressure detector 560 detects the pressure transmitted between the injection motor 550 and the screw 530. The pressure detector 560 is provided in a force transmission path between the injection motor 550 and the screw 530 and detects the pressure acting on the pressure detector 560.

  The pressure detector 560 sends a signal indicating the detection result to the control device 700. The detection result of the pressure detector 560 is used for control and monitoring of the pressure received by the screw 530 from the molding material, the back pressure against the screw 530, and the pressure acting on the molding material from the screw 530.

  The second injection device 500 performs a filling process, a pressure holding process, a measuring process, and the like under the control of the control device 700.

  In the filling process, the injection motor 550 is driven to advance the screw 530 at a set speed, and the liquid molding material accumulated in front of the screw 530 is filled into the cavity space 14 in the mold apparatus 10. The position and speed of the screw 530 are detected using, for example, an injection motor encoder 551. The injection motor encoder 551 detects the rotation of the injection motor 550 and sends a signal indicating the detection result to the control device 700. When the position of the screw 530 reaches the set position, switching from the filling process to the pressure holding process (so-called V / P switching) is performed. A position where the V / P switching is performed is also referred to as a V / P switching position. The set speed of the screw 530 may be changed according to the position and time of the screw 530.

  In addition, after the position of the screw 530 reaches the set position in the filling process, the screw 530 may be temporarily stopped at the set position, and then V / P switching may be performed. Immediately before the V / P switching, instead of stopping the screw 530, the screw 530 may be moved forward or backward at a slow speed.

  In the pressure holding process, the injection motor 550 is driven to push the screw 530 forward, and the pressure of the molding material at the front end portion of the screw 530 (hereinafter also referred to as “holding pressure”) is maintained at a set pressure, and is stored in the cylinder 510. The remaining molding material is pushed toward the mold apparatus 10. Insufficient molding material due to cooling shrinkage in the mold apparatus 10 can be replenished. The holding pressure is detected using a pressure detector 560, for example. The pressure detector 560 sends a signal indicating the detection result to the control device 700. The set value of the holding pressure may be changed according to the elapsed time from the start of the pressure holding process.

  In the pressure holding process, the molding material in the cavity space 14 in the mold apparatus 10 is gradually cooled, and when the pressure holding process is completed, the inlet of the cavity space 14 is closed with the solidified molding material. This state is called a gate seal, and the backflow of the molding material from the cavity space 14 is prevented. After the pressure holding process, the cooling process is started. In the cooling process, the molding material in the cavity space 14 is solidified. In order to shorten the molding cycle time, a metering step may be performed during the cooling step.

  In the metering step, the metering motor 540 is driven to rotate the screw 530 at the set rotational speed, and the molding material is fed forward along the spiral groove of the screw 530. Along with this, the molding material is gradually melted. As the liquid molding material is fed forward of the screw 530 and accumulated in the front of the cylinder 510, the screw 530 is retracted. The rotational speed of the screw 530 is detected by using, for example, a metering motor encoder 541. The weighing motor encoder 541 detects the rotation of the weighing motor 540 and sends a signal indicating the detection result to the control device 700.

  In the metering step, the set back pressure may be applied to the screw 530 by driving the injection motor 550 in order to limit the rapid retreat of the screw 530. The back pressure with respect to the screw 530 is detected using, for example, a pressure detector 560. The pressure detector 560 sends a signal indicating the detection result to the control device 700. When the screw 530 is retracted to the measurement completion position and a predetermined amount of molding material is accumulated in front of the screw 530, the measurement process is completed.

  The second injection device 500 of this embodiment is an inline screw method, but may be a pre-plastic method or the like. A pre-plastic injection device supplies a molding material melted in a plasticizing cylinder to the injection cylinder, and injects the molding material from the injection cylinder into a mold device. In the plasticizing cylinder, a screw is rotatably or rotatably and reciprocally disposed, and in the injection cylinder, a plunger is reciprocally disposed.

  The second injection device 500 of the present embodiment is a horizontal type in which the axial direction of the cylinder 510 is the horizontal direction, but may be a vertical type in which the axial direction of the cylinder 510 is the vertical direction. The mold clamping device combined with the vertical second injection device 500 may be a vertical type or a horizontal type. Similarly, the mold clamping device combined with the horizontal second injection device 500 may be a horizontal type or a saddle type.

(Second moving device)
In the description of the second moving device 600, as in the description of the second injection device 500, the direction in which the second injection device 500 approaches the mold device 10 (the downward direction in FIGS. 3 and 4) is the front, The direction in which the two-injection apparatus 500 is separated from the mold apparatus 10 (upward direction in FIGS. 3 and 4) will be described as the rear. 3 and 4, the second moving device 600 is arranged on one side of the cylinder 510 of the second injection device 500, but it may be arranged on both sides of the cylinder 510, and is arranged symmetrically around the cylinder 510. May be.

  The second moving device 600 advances and retracts the second injection device 500 with respect to the mold device 10. Further, the second moving device 600 presses the nozzle 520 against the mold device 10 to generate a nozzle touch pressure. The second moving device 600 includes a hydraulic pump 610, a motor 620 as a drive source, a hydraulic cylinder 630 as a hydraulic actuator, and the like.

  The hydraulic pump 610 has a first port 611 and a second port 612. The hydraulic pump 610 is a pump that can rotate in both directions. By switching the rotation direction of the motor 620, hydraulic fluid (for example, oil) is sucked from one of the first port 611 and the second port 612 and discharged from the other. Then, hydraulic pressure is generated. The hydraulic pump 610 can also suck the working fluid from the tank and discharge the working fluid from either the first port 611 or the second port 612.

  The motor 620 operates the hydraulic pump 610. The motor 620 drives the hydraulic pump 610 with the rotational direction and rotational torque corresponding to the control signal from the control device 700. The motor 620 may be an electric motor or an electric servo motor.

  The hydraulic cylinder 630 includes a cylinder body 631, a piston 632, and a piston rod 633. The cylinder body 631 is fixed with respect to the second injection device 500. The piston 632 divides the interior of the cylinder body 631 into a front chamber as a first chamber and a rear chamber as a second chamber. The piston rod 633 is fixed to the fixed platen 110.

  The front chamber of the hydraulic cylinder 630 is connected to the first port 611 of the hydraulic pump 610 via the first flow path 601. The hydraulic fluid discharged from the first port 611 is supplied to the front chamber via the first flow path 601, whereby the second injection device 500 is pushed forward. The second injection device 500 is advanced, and the nozzle 520 is pressed against the fixed mold 11. The front chamber functions as a pressure chamber that generates the nozzle touch pressure of the nozzle 520 by the pressure of the hydraulic fluid supplied from the hydraulic pump 610.

  On the other hand, the rear chamber of the hydraulic cylinder 630 is connected to the second port 612 of the hydraulic pump 610 via the second flow path 602. The hydraulic fluid discharged from the second port 612 is supplied to the rear chamber of the hydraulic cylinder 630 via the second flow path 602, whereby the second injection device 500 is pushed backward. The second injection device 500 is retracted, and the nozzle 520 is separated from the fixed mold 11.

  In the present embodiment, the second moving device 600 includes the hydraulic cylinder 630, but the present invention is not limited to this. For example, instead of the hydraulic cylinder 630, an electric motor and a motion conversion mechanism that converts the rotational motion of the electric motor into the linear motion of the second injection device 500 may be used.

(Control device)
FIG. 6 is a functional block diagram showing components of the control device according to the embodiment. Each functional block illustrated in FIG. 6 is conceptual and does not necessarily need to be physically configured as illustrated. All or a part of each functional block can be configured to be functionally or physically distributed and integrated in arbitrary units. Each processing function performed in each functional block may be realized entirely or arbitrarily by a program executed by the CPU, or may be realized as hardware by wired logic.

  For example, the control device 700 controls the opening and closing of the first flow path 22 that connects the first injection port 21 and the cavity space 14 of the mold device 10, and the second injection port 23 and the cavity space 14 of the mold device 10. A flow path opening / closing processing unit 711 that controls opening and closing of the second flow path 24 to be connected is provided. The channel opening / closing processor 711 opens one of the first channel 22 and the second channel 24 and closes the other of the first channel 22 and the second channel 24.

  The channel opening / closing processor 711 controls the operation of the first channel opening / closing device 30 that opens and closes the first channel 22. When the first flow path opening / closing device 30 opens the first flow path 22, the molding material can be filled from the first inlet 21 into the cavity space 14. On the other hand, when the first flow path opening / closing device 30 closes the first flow path 22, filling of the molding material from the first inlet 21 to the cavity space 14 is prohibited.

  The first flow path opening / closing device 30 is, for example, a valve gate system, and an open position (see FIG. 3) for opening the first flow path 22 and a closed position (see FIG. 4) for closing the first flow path 22. It has the valve pin 31 (FIG. 5) which moves. The first flow path opening / closing device 30 includes a fluid pressure cylinder 32 such as a pneumatic cylinder that moves the valve pin 31 and a drive unit 33 that supplies fluid such as air to the fluid pressure cylinder 32. The drive unit 33 moves the valve pin 31 from the closed position to the open position by supplying fluid to the opening chamber of the fluid pressure cylinder 32. In addition, the drive unit 33 moves the valve pin 31 from the open position to the closed position by supplying fluid to the closing chamber of the fluid pressure cylinder 32. The drive unit 33 may be a part of the mold apparatus 10 or a part of an injection molding machine.

  When the first flow path 22 is closed, the flow path opening / closing processing unit 711 may confirm completion of the closing of the first flow path 22. For the confirmation, for example, a pressure detector that detects the pressure in the closing chamber of the fluid pressure cylinder 32 is used. When the closing of the first flow path 22 is completed, the valve pin 31 hits the wall surface of the first flow path 22 and stops moving, and the piston of the fluid pressure cylinder 32 stops moving. Therefore, if the fluid is continuously supplied to the closing chamber, The chamber pressure increases. Based on whether or not the pressure in the closing chamber is equal to or higher than the threshold value, it can be determined whether or not the closing of the first flow path 22 is completed.

  Further, when opening the first flow path 22, the flow path opening / closing processing unit 711 may confirm the completion of the opening of the first flow path 22. For the confirmation, for example, a pressure detector that detects the pressure in the opening chamber of the fluid pressure cylinder 32 is used. When the opening of the first flow path 22 is completed, the piston of the fluid pressure cylinder 32 stops moving by the stopper 35. Therefore, when the fluid is continuously supplied to the opening chamber, the pressure in the opening chamber rises. Based on whether or not the pressure in the opening chamber is equal to or higher than the threshold value, it can be determined whether or not the opening of the first flow path 22 is completed.

  The channel opening / closing processor 711 controls the operation of the second channel opening / closing device 40 that opens and closes the second channel 24. When the second flow path opening / closing device 40 opens the second flow path 24, the molding material can be filled into the cavity space 14 from the second inlet 23. On the other hand, when the second flow path opening / closing device 40 closes the second flow path 24, filling of the molding material from the second inlet 23 into the cavity space 14 is prohibited.

  The second flow path opening / closing device 40 is, for example, a valve gate system, and an open position (see FIG. 4) for opening the second flow path 24 and a closed position (see FIG. 3) for closing the second flow path 24. Has a valve pin 41 (FIG. 5). The second flow path opening / closing device 40 includes a fluid pressure cylinder 42 such as a pneumatic cylinder that moves the valve pin 41, and a drive unit 43 that supplies fluid such as air to the fluid pressure cylinder 42. The drive unit 43 moves the valve pin 41 from the closed position to the open position by supplying fluid to the opening chamber of the fluid pressure cylinder 42. Further, the drive unit 43 moves the valve pin 41 from the open position to the closed position by supplying fluid to the closing chamber of the fluid pressure cylinder 42. The drive unit 43 may be a part of the mold apparatus 10 or a part of an injection molding machine.

  When the second flow path 24 is closed, the flow path opening / closing processing unit 711 may confirm the completion of the closing of the second flow path 24. For the confirmation, for example, a pressure detector that detects the pressure in the closing chamber of the fluid pressure cylinder 42 is used. When the closing of the second flow path 24 is completed, the valve pin 41 comes into contact with the wall surface of the second flow path 24 and stops moving, and the piston of the fluid pressure cylinder 42 stops moving. The chamber pressure increases. Based on whether or not the pressure in the closing chamber is equal to or higher than the threshold value, it can be determined whether or not the closing of the second flow path 24 is completed.

  Further, when opening the second flow path 24, the flow path opening / closing processing unit 711 may confirm the completion of the opening of the second flow path 24. For the confirmation, for example, a pressure detector that detects the pressure in the opening chamber of the fluid pressure cylinder 42 is used. When the opening of the second flow path 24 is completed, the piston of the fluid pressure cylinder 42 stops moving by the stopper 45. Therefore, when the fluid is continuously supplied to the opening chamber, the pressure in the opening chamber rises. Based on whether or not the pressure in the opening chamber is equal to or higher than the threshold value, it can be determined whether or not the opening of the second flow path 24 is completed.

  As shown in FIG. 6, the control device 700 controls the molding operation for filling the cavity space 14 with the molding material from one of the first channel 22 and the second channel 24 opened by the channel opening / closing processor 711. A molding processing unit 712 for performing the processing. The first injection device 300 is brought into contact with and separated from the first injection port 21 of the mold apparatus 10 and fills the cavity space 14 from the first injection port 21 through the first flow path 22 with the molding material. Further, the second injection device 500 is brought into contact with and separated from the second injection port 23 of the mold apparatus 10, and fills the cavity space 14 from the second injection port 23 through the second flow path 24 with the molding material.

  The molding processing unit 712 may prohibit the injection of the molding material from the first injection device 300 to the first injection port 21 until it is confirmed that the opening of the first channel 22 is completed and the second channel 24 is closed. . After confirming the completion of the opening of the first flow path 22, the molding material can be reliably injected from the first injection port 21 to the cavity space 14 by allowing the injection of the molding material from the first injection device 300 to the first injection port 21. Can be filled. In addition, by confirming the completion of the closing of the second flow path 24, the backflow of the molding material from the inside of the mold apparatus 10 to the second injection port 23 can be prevented.

  The molding processing unit 712 may prohibit the injection of the molding material from the second injection device 500 to the second injection port 23 until the completion of the opening of the second flow path 24 and the completion of the closing of the first flow path 22 are confirmed. . After confirming the completion of the opening of the second flow path 24, the molding material can be reliably injected from the second injection port 23 into the cavity space 14 by allowing the injection of the molding material from the second injection device 500 to the second injection port 23. Can be filled. In addition, by confirming the completion of the closing of the first flow path 22, the backflow of the molding material from the inside of the mold apparatus 10 to the first injection port 21 can be prevented.

  As described above, the injection molding machine according to the present embodiment opens one of the first flow path 22 and the second flow path 24 and closes the other of the first flow path 22 and the second flow path 24. An opening / closing processing unit 711, and a molding processing unit 712 for controlling a molding operation of filling the cavity space 14 with a molding material from one of the first channel 22 and the second channel 24 opened by the channel opening / closing processing unit 711. Have Therefore, while one of the first injection device 300 and the second injection device 500 repeatedly performs a molding operation for manufacturing a molded product, the other of the first injection device 300 and the second injection device 500 can prepare for molding. . Therefore, the time for interrupting the production of the molded product in order to change the type of the molding material filled in the mold apparatus 10 can be shortened.

  In the present specification, the molding preparation is also referred to as “setup”. Hereinafter, the setup of the first injection device 300 will be described. Since the setup of the second injection device 500 is the same as the setup of the first injection device 300, description thereof is omitted.

  The setup includes, for example, a temperature raising process for raising the temperature of the cylinder 310 to the molding temperature, a purge process for replacing the molding material inside the cylinder 310, and the like. The old molding material and the new molding material replaced by the purge process may be different types of materials, for example, different color materials. The operation of the first injection device 300 performed for the purge process is also referred to as “purge operation”.

  The purge operation may include, for example, rotation of the screw 330 and advance / retreat of the screw 330 as in the molding operation. By rotating the screw 330, the molding material is fed forward along the spiral groove of the screw 330. As the molding material accumulates in the front of the cylinder 310, the screw 330 is retracted. Thereafter, by advancing the screw 330, the molding material accumulated in front of the screw 330 is discharged from the nozzle 320 to the outside of the mold apparatus 10.

  Note that the purge operation may include only the rotation of the screw 330. By rotating the screw 330 at a fixed position, the molding material is fed forward along the spiral groove of the screw 330, and the molding material in the cylinder 310 is discharged from the nozzle 320 to the outside of the mold apparatus 10.

  The purge process is performed by repeatedly performing the purge operation. The purge operation is performed intermittently or continuously.

  The purge process is started after the temperature raising process for raising the temperature of the cylinder 310 to the molding temperature or in the middle of the temperature raising process. The set temperature of the cylinder 310 at the start of the temperature raising process may be a room temperature or a heat retaining temperature. The heat retention temperature is set to a temperature lower than the molding temperature at which the molding operation is performed in order to suppress the deterioration of the molding material inside the cylinder 310. While the temperature of the cylinder 310 is at the room temperature or the heat retaining temperature, the purge operation is not performed as well as the molding operation. The purge operation is performed after the temperature of the cylinder 310 reaches the molding temperature or while the temperature of the cylinder 310 rises from the heat retention temperature to the molding temperature.

  The purge process is started, for example, after the temperature of the cylinder 310 reaches a predetermined temperature and after a predetermined input operation (for example, operation of a purge permission button) is performed by the user. The purge process may be automatically started without waiting for a user command after the temperature of the cylinder 310 reaches a predetermined temperature.

  As shown in FIG. 6, the control device 700 controls the first injection device 300 and the second injection device 500 while filling the cavity space 14 with the molding material from one of the first injection device 300 and the second injection device 500. You may have the setup process part 713 which controls the other setup. While one injection device repeatedly performs a molding operation for manufacturing a molded product, the other one injection device can automatically perform setup. Therefore, the time for interrupting the production of the molded product in order to change the type of the molding material filled in the mold apparatus 10 can be shortened.

  The setup processing unit 713 uses the first injection device 300 and the second injection device 500 based on the degree of progress of continuous production in which one of the first injection device 300 and the second injection device 500 is used to repeatedly manufacture a molded product. You may control the other setup of this. By the end of continuous production by one injection device, the setup of the other injection device can be advanced to a predetermined stage, and the production efficiency can be further improved.

  The setup processing unit 713 controls the setup timing, for example, based on the progress of continuous production. The setup timing includes (A) timing of starting the temperature raising process for raising the temperature of the cylinder to the molding temperature, (B) timing for ending the temperature raising process for the cylinder, (C) timing for starting the purge process, (D) At least one of the end timings of the purge process may be included.

  The setup timing may be controlled based on the end timing of continuous production. In continuous production, molding is repeated under the same molding conditions. The number of repetitions is called the number of shots. The progress of continuous production is represented, for example, by the number of shots remaining until the end of continuous production. The remaining time may be used instead of the remaining shot number.

  Note that the progress of continuous production may be represented by the number of shots counted from the start of continuous production or the elapsed time from the start of continuous production. The number of shots counted from the start of continuous production may be used in combination with the total number of shots from the start to the end of continuous production. Further, the elapsed time from the start of continuous production may be used in combination with the total time from the start to the end of continuous production.

  FIG. 7 is a diagram illustrating the relationship between the remaining shots of the first injection device and the setup of the second injection device according to an embodiment. In FIG. 7, when the number of remaining shots of the first injection device 300 reaches N1, the setup processing unit 713 raises the temperature of the cylinder 510 of the second injection device 500 to the molding temperature (hereinafter simply referred to as “first” This is also referred to as “temperature rising process of the two injection device 500”. Further, the setup processing unit 713 finishes the temperature raising process of the second injection device 500 until the number of remaining shots of the first injection device 300 reaches N2 (N2 <N1). Further, when the number of remaining shots of the first injection device 300 reaches N3 (N3 <N2), the setup processing unit 713 starts the purge process of the second injection device 500. Furthermore, the setup processing unit 713 ends the purge process of the second injection device 500 until the number of remaining shots of the first injection device 300 reaches N4 (N4 <N3). Thus, the setup of the second injection device 500 can be completed before the continuous production by the first injection device 300 is completed.

  FIG. 8 is a diagram illustrating an operation screen used for setting the setup of the second injection device according to the embodiment. The operation screen 761 shown in FIG. 8 is provided with a setting field 762 for inputting the setup timing of the second injection device 500 in association with the progress of continuous production of the first injection device 300. The setup processing unit 713 performs setup of the first injection device 300 according to the timing input in the setting field 762.

  The setup timing input to the setting field 762 includes, for example, the start timing of the temperature raising process of the second injection device 500. Therefore, the temperature raising process of the second injection device 500 can be started in accordance with the progress of continuous production by the first injection device 300. As a result, the temperature raising process of the second injection device 500 can be ended before the continuous production by the first injection device 300 is ended.

  The setup processing unit 713 performs continuous production by the first injection device 300 based on the start timing of the temperature increase processing of the second injection device 500 and the temperature increase pattern of the temperature increase processing input to the setting field 762. It may be determined whether or not the temperature raising process of the second injection device 500 is finished before the end.

  If the setup processing unit 713 determines that the temperature raising process of the second injection device 500 is not completed before the end of continuous production by the first injection device 300, the setup processing unit 713 inputs the setting processing unit 762 to end the temperature raising process. The corrected timing may be corrected.

  In addition, the setup processing unit 713 may output an alarm when determining that the temperature raising process of the second injection device 500 is not completed before the end of continuous production by the first injection device 300. The alarm may be displayed on the display device 760 or may be output by a dedicated alarm device.

  The setup timing input to the setting field 762 is not limited to (A) the start timing of the temperature raising process of the second injection device 500. For example, (B) the timing of the end of the temperature raising process of the second injection device 500, (C) the timing of the start of the purge process of the second injection device 500, (D) the timing of the end of the purge process of the second injection device 500 Etc. A plurality of timings may be set.

  When the end timing of the temperature rise process of the second injection device 500 is set, the setup processing unit 713 calculates the start timing of the temperature rise process of the second injection device 500 based on the timing and the temperature rise pattern. To do. The setup processing unit 713 starts the temperature raising process of the second injection device 500 at the calculated timing. Also in this case, the temperature raising process of the second injection device 500 can be ended before the continuous production by the first injection device 300 is ended.

  When the start timing of the purge process of the second injection device 500 is set, the setup processing unit 713 starts the purge process of the second injection device 500 at the set timing. Thereby, the purge process of the second injection device 500 can be ended before the continuous production by the first injection device 300 is ended.

  When the end timing of the purge process of the second injection device 500 is set, the setup processing unit 713 calculates the start timing of the purge process based on the timing and the time required for the purge process. The setup processing unit 713 starts the purge process of the second injection device 500 at the calculated timing. Also in this case, the purge process of the second injection device 500 can be ended before the end of continuous production by the first injection device 300.

  The setup timing input to the setting field 762 may be set with reference to the end timing of continuous production by the first injection device 300, and may be set by the number of remaining shots or the remaining time, for example. By the end of continuous production by the first injection device 300, the setup of the second injection device 500 can be reliably advanced to a predetermined stage. Moreover, efficiency can be achieved by using the timing of the end of continuous production by the first injection device 300 as a reference. This is because if the setup of the second injection device 500 is completed earlier than the end of continuous production by the first injection device 300, the setup becomes useless and a purge process or the like is required again. The setup timing of the second injection device 500 may be set so that the standby time from the end of the purge process of the second injection device 500 to the end of continuous production by the first injection device 300 is within a predetermined time. .

  FIG. 9 is a diagram illustrating the relationship between the remaining shots of the second injection device and the setup of the first injection device according to one embodiment. In FIG. 9, when the number of remaining shots of the second injection device 500 reaches N1, the setup processing unit 713 raises the temperature of the cylinder 310 of the first injection device 300 to the molding temperature (hereinafter simply referred to as “first” This is also referred to as “temperature rise processing of one injection device 300”). Further, the setup processing unit 713 finishes the temperature raising process of the first injection device 300 until the number of remaining shots of the second injection device 500 reaches N2 (N2 <N1). Further, when the number of remaining shots of the second injection apparatus 500 reaches N3 (N3 <N2), the setup processing unit 713 starts the purge process of the first injection apparatus 300. Furthermore, the setup processing unit 713 ends the purge process of the first injection device 300 until the number of remaining shots of the second injection device 500 reaches N4 (N4 <N3). Accordingly, the setup of the first injection device 300 can be completed before the continuous production by the second injection device 500 is completed.

  FIG. 10 is a diagram illustrating an operation screen used for setting the setup of the first injection device according to the embodiment. The operation screen 761 shown in FIG. 10 is provided with a setting field 763 for inputting the setup timing of the first injection device 300 in association with the progress of continuous production of the second injection device 500. The setup processing unit 713 performs setup of the second injection device 500 according to the timing input in the setting field 763.

  The setup timing input to the setting field 763 includes, for example, the start timing of the temperature raising process of the first injection device 300. Therefore, the temperature raising process of the first injection device 300 can be started in accordance with the progress of continuous production by the second injection device 500. As a result, the temperature raising process of the first injection device 300 can be completed before the continuous production by the second injection device 500 is completed.

  The setup processing unit 713 performs the continuous production by the second injection device 500 based on the start timing of the temperature increase processing of the first injection device 300 and the temperature increase pattern of the temperature increase processing input to the setting field 763. It may be determined whether or not the temperature raising process of the first injection device 300 ends before the end.

  If the setup processing unit 713 determines that the temperature raising process of the first injection device 300 is not completed before the end of continuous production by the second injection device 500, the setup processing unit 713 inputs the setting process 763 to end the temperature raising process. The corrected timing may be corrected.

  In addition, the setup processing unit 713 may output an alarm when determining that the temperature raising process of the first injection device 300 is not completed before the end of continuous production by the second injection device 500. The alarm may be displayed on the display device 760 or may be output by a dedicated alarm device.

  The setup timing input to the setting field 763 is not limited to (A) the start timing of the temperature raising process of the first injection device 300. For example, (B) timing for finishing the temperature raising process of the first injection device 300, (C) timing for starting the purge processing of the first injection device 300, and (D) timing for ending the purge processing of the first injection device 300. Etc. A plurality of timings may be set.

  When the end timing of the temperature raising process of the first injection device 300 is set, the setup processing unit 713 calculates the timing of starting the temperature raising process of the first injection device 300 based on the timing and the temperature rising pattern. To do. The setup processing unit 713 starts the temperature raising process of the first injection device 300 at the calculated timing. Also in this case, the temperature increasing process of the first injection device 300 can be ended before the continuous production by the second injection device 500 is ended.

  When the start timing of the purge process of the first injection device 300 is set, the setup processing unit 713 starts the purge process of the first injection device 300 at the set timing. Thereby, the purge process of the first injection device 300 can be ended before the continuous production by the second injection device 500 is ended.

  When the end timing of the purge process of the first injection device 300 is set, the setup processing unit 713 calculates the start timing of the purge process based on the timing and the time required for the purge process. The setup processing unit 713 starts the purge process of the first injection device 300 at the calculated timing. Also in this case, the purge process of the first injection device 300 can be ended before the continuous production by the second injection device 500 is ended.

  The setup timing input in the setting column 763 may be set based on the end timing of continuous production by the second injection device 500, and may be set, for example, by the number of remaining shots or the remaining time. By the end of continuous production by the second injection device 500, the setup of the first injection device 300 can be reliably advanced to a predetermined stage. Moreover, efficiency can be achieved by using the timing of the end of continuous production by the second injection device 500 as a reference. This is because if the setup of the first injection device 300 is completed earlier than the end of continuous production by the second injection device 500, the setup becomes useless and a purge process or the like is required again. The setup timing of the first injection device 300 may be set so that the standby time from the end of the purge process of the first injection device 300 to the end of continuous production by the second injection device 500 is within a predetermined time. .

  As shown in FIG. 6, the control device 700 controls the contact / separation of the first injection device 300 with respect to the first injection port 21 and also controls the contact / separation of the second injection device 500 with respect to the second injection port 23. A portion 714 may be included. The movement processing unit 714 separates one of the first injection device 300 and the second injection device 500 from the mold device 10 and causes the mold device 10 to touch the other of the first injection device 300 and the second injection device 500. . The molding processing unit 712 controls the molding operation of filling the cavity space 14 with the molding material from the other of the first injection device 300 and the second injection device 500 that are touched to the mold apparatus 10 by the movement processing unit 714. The first injection device 300 and the second injection device 500 can be prevented from simultaneously filling the cavity space 14 with the molding material, and damage to the mold device 10 can be prevented.

  When the movement processing unit 714 brings the first injection device 300 closer to the mold apparatus 10, the movement processing unit 714 may confirm the completion of the approach, and the nozzle 320 of the first injection apparatus 300 is connected to the first injection port of the mold apparatus 10. You may confirm that it exists in the nozzle touch position (refer FIG. 3) which touches 21. FIG. For the confirmation, for example, a presence detector 721 that detects the presence of the first injection device 300 is used. As the presence detector 721, for example, a non-contact type proximity switch is used, but a contact type switch may be used. The presence detector 721 may output a signal only when the first injection device 300 exists at the nozzle touch position, or may output a signal only when the first injection device 300 does not exist at the nozzle touch position. . The presence detector 721 may output different signals depending on whether the first ejection device 300 is present at the nozzle touch position and when the first ejection device 300 is not present at the nozzle touch position.

  In addition, when the movement processing unit 714 moves the first injection device 300 away from the mold device 10, the movement processing unit 714 may confirm the completion of the separation, and the nozzle 320 of the first injection device 300 is connected to the first mold device 10. You may confirm that it exists in the stand-by position (refer FIG. 4) away from the injection port 21. FIG. For the confirmation, for example, a presence detector 722 that detects the presence of the first injection device 300 is used. As the presence detector 722, for example, a non-contact type proximity switch is used, but a contact type switch may be used. The presence detector 722 may output a signal only when the first injection device 300 exists at the standby position, or may output a signal only when the first injection device 300 does not exist at the standby position. Further, the presence detector 722 may output different signals when the first injection device 300 is present at the standby position and when the first injection device 300 is not present at the standby position.

  In this embodiment, the presence detectors 721 and 722 are used to detect the position of the first injection device 300, but the present invention is not limited to this. For example, when the first moving device 400 includes an electric motor and a motion conversion mechanism that converts the rotational motion of the electric motor into the linear motion of the first injection device 300, the first moving device 400 uses an encoder that detects the rotation of the electric motor. The position of one injection device 300 may be detected.

  When the movement processing unit 714 causes the second injection device 500 to approach the mold device 10, the movement processing unit 714 may confirm the completion of the approach, and the nozzle 520 of the second injection device 500 is connected to the second injection port of the mold device 10. You may confirm that it exists in the nozzle touch position (refer FIG. 4) which touches 23. FIG. For the confirmation, for example, a presence detector 723 that detects the presence of the second injection device 500 is used. As the presence detector 723, for example, a non-contact type proximity switch is used, but a contact type switch may be used. The presence detector 723 may output a signal only when the second ejection device 500 is present at the nozzle touch position, or may output a signal only when the second ejection device 500 is not present at the nozzle touch position. . Further, the presence detector 723 may output different signals when the second ejection device 500 is present at the nozzle touch position and when the second ejection device 500 is not present at the nozzle touch position.

  Further, when the movement processing unit 714 moves the second injection device 500 away from the mold device 10, the movement processing unit 714 may confirm the completion of the separation, and the nozzle 520 of the second injection device 500 is connected to the second mold device 10. You may confirm that it exists in the stand-by position (refer FIG. 3) away from the injection port 23. FIG. For the confirmation, for example, a presence detector 724 that detects the presence of the second injection device 500 is used. As the presence detector 724, for example, a non-contact type proximity switch is used, but a contact type switch may be used. The presence detector 724 may output a signal only when the second injection device 500 exists at the standby position, or may output a signal only when the second injection device 500 does not exist at the standby position. The presence detector 724 may output different signals depending on whether the second injection device 500 is in the standby position and when the second injection device 500 is not in the standby position.

  In this embodiment, the presence detectors 723 and 724 are used to detect the position of the second injection device 500, but the present invention is not limited to this. For example, when the second moving device 600 has an electric motor and a motion conversion mechanism that converts the rotational motion of the electric motor into the linear motion of the second injection device 500, the second moving device 600 uses the encoder that detects the rotation of the electric motor. The position of the two injection device 500 may be detected.

  The movement processing unit 714 and the flow path opening / closing processing unit 711 cooperate to perform a replacement process of replacing the injection device used for injection molding and replacing the flow path used for injection molding. The replacement process includes at least one of the following process (1) and the following process (2). (1) In order to shift the injection molding machine from the state shown in FIG. 3 to the state shown in FIG. 4, the first injection device 300 is separated from the mold device 10, the first flow path 22 is closed, and the second injection is performed. The apparatus 500 is touched to the mold apparatus 10 and the second flow path 24 is opened. (2) In order to shift the injection molding machine from the state shown in FIG. 4 to the state shown in FIG. 3, the second injection device 500 is separated from the mold device 10, the second flow path 24 is closed, and the first injection is performed. The apparatus 300 is touched to the mold apparatus 10 and the first flow path 22 is opened.

  As illustrated in FIG. 6, the control device 700 may include an input operation detection unit 715 that detects a predetermined input operation. When the input operation detection unit 715 detects a predetermined input operation, the movement processing unit 714 and the flow path opening / closing processing unit 711 perform the above replacement process.

  FIG. 11 is a diagram illustrating an operation screen displayed on the display device according to the embodiment. An operation screen 761 illustrated in FIG. 11 includes an operation button 764 that receives a predetermined input operation for performing the replacement process.

  When the operation button 764 is operated, the input operation detection unit 715 receives a signal corresponding to the operation. Thereby, the movement processing unit 714 and the flow path opening / closing processing unit 711 perform the above replacement process.

  Note that the operation button 764 may be a physical button such as a push switch, a slide switch, or a toggle switch, and may be provided separately from the display device 760.

  FIG. 12 is a flowchart of a control device replacement process according to an embodiment, in which an injection device used for injection molding is replaced from a first injection device to a second injection device, and a flow path used for injection molding is changed from the first flow path. It is a flowchart switched to a 2nd flow path.

  The process after step S101 shown in FIG. 12 is started when the input operation detection unit 715 detects a predetermined input operation, for example. In addition, the order of each step shown in FIG. 12 is an example, and the order of FIG. 12 is not particularly limited.

  In step S <b> 101, the flow path opening / closing processor 711 closes the first flow path 22. Subsequently, in step S102, the flow path opening / closing processing unit 711 checks whether or not the first flow path 22 has been closed. If the blockage of the first flow path 22 has not been completed in step S102 (step S102, No), the process returns to step S101, and the processes after step S101 are performed. Until the completion of the blockage of the first flow path 22 is confirmed, the processing after step S103 may be prohibited. On the other hand, when the blockage of the first flow path 22 is completed in step S102 (step S102, Yes), the process proceeds to step S103.

  In step S103, the movement processing unit 714 moves the first injection device 300 from the nozzle touch position to the standby position. Subsequently, in step S104, the movement processing unit 714 checks whether or not the movement of the first injection device 300 to the standby position has been completed. When the movement of the first injection device 300 to the standby position is not completed in step S104 (No in step S104), the process returns to step S103, and the processes after step S103 are performed. Until the completion of the movement of the first injection device 300 to the standby position is confirmed, the processing after step S105 may be prohibited. On the other hand, when the movement of the first injection device 300 to the standby position is completed in step S104 (step S104, Yes), the process proceeds to step S105.

  In step S105, the movement processing unit 714 moves the second injection device 500 from the standby position to the nozzle touch position. Subsequently, in step S106, the movement processing unit 714 checks whether or not the movement of the second ejection device 500 to the nozzle touch position is completed. If the movement of the second injection device 500 to the nozzle touch position is not completed in step S106 (No in step S106), the process returns to step S105, and the processes after step S105 are performed. Until the completion of the movement of the second injection device 500 to the nozzle touch position is confirmed, the processing after step S107 may be prohibited. On the other hand, when the movement of the second injection device 500 to the nozzle touch position is completed in Step S106 (Yes in Step S106), the process proceeds to Step S107.

  In step S <b> 107, the flow path opening / closing processing unit 711 opens the second flow path 24. Subsequently, in step S108, the flow path opening / closing processing unit 711 checks whether or not the opening of the second flow path 24 is completed. If the opening of the second flow path 24 has not been completed in step S108 (step S108, No), the process returns to step S107, and the processes after step S107 are performed. On the other hand, when the opening of the second flow path 24 is completed in step S108 (step S102, Yes), the current process is terminated.

  Thereafter, the second injection device 500 fills the cavity space 14 with the molding material from the second injection port 23. The molding processing unit 712 prohibits the injection of the molding material from the second injection device 500 to the second injection port 23 until it is confirmed that the opening of the second channel 24 and the closing of the first channel 22 are completed. Good. After confirming the completion of the opening of the second flow path 24, the molding material can be reliably injected from the second injection port 23 into the cavity space 14 by allowing the injection of the molding material from the second injection device 500 to the second injection port 23. Can be filled. In addition, by confirming the completion of the closing of the first flow path 22, the backflow of the molding material from the inside of the mold apparatus 10 to the first injection port 21 can be prevented.

  Further, according to FIG. 12, since the second injection device 500 is allowed to be injected after the movement of the first injection device 300 to the standby position is completed, the first injection device 300 and the second injection The apparatus 500 can be prevented from simultaneously filling the cavity space 14 with the molding material, and the mold apparatus 10 can be prevented from being damaged.

  FIG. 13: is a flowchart of the replacement process of the control apparatus by one Embodiment, Comprising: The injection apparatus used for injection molding is replaced from a 2nd injection apparatus to a 1st injection apparatus, and the flow path used for injection molding is changed from a 2nd flow path. It is a flowchart switched to a 1st flow path.

  The processing after step S201 shown in FIG. 13 is started when, for example, the input operation detection unit 715 detects a predetermined input operation. In addition, the order of each step shown in FIG. 13 is an example, and the order of FIG. 13 is not particularly limited.

  In step S <b> 201, the flow path opening / closing processor 711 closes the second flow path 24. Subsequently, in step S202, the flow path opening / closing processing unit 711 checks whether or not the closing of the second flow path 24 is completed. When the blockage of the second flow path 24 is not completed in step S202 (No in step S202), the process returns to step S201, and the processes after step S201 are performed. Until the completion of the blockage of the second flow path 24 is confirmed, the processing after step S203 may be prohibited. On the other hand, when the blockage of the second flow path 24 is completed in step S202 (step S202, Yes), the process proceeds to step S203.

  In step S203, the movement processing unit 714 moves the second injection device 500 from the nozzle touch position to the standby position. Subsequently, in step S204, the movement processing unit 714 checks whether or not the movement of the second injection device 500 to the standby position has been completed. When the movement of the second injection device 500 to the standby position is not completed in step S204 (No in step S204), the process returns to step S203, and the processes after step S203 are performed. Until the completion of the movement of the second injection device 500 to the standby position is confirmed, the processing after step S205 may be prohibited. On the other hand, when the movement of the second injection device 500 to the standby position is completed in step S204 (step S204, Yes), the process proceeds to step S205.

  In step S205, the movement processing unit 714 moves the first injection device 300 from the standby position to the nozzle touch position. Subsequently, in step S206, the movement processing unit 714 checks whether or not the movement of the first injection device 300 to the nozzle touch position has been completed. If the movement of the first injection device 300 to the nozzle touch position has not been completed in step S206 (No in step S206), the process returns to step S205, and the processes in and after step S205 are performed. Until the completion of the movement of the first injection device 300 to the nozzle touch position is confirmed, the processing after step S207 may be prohibited. On the other hand, when the movement of the first injection device 300 to the nozzle touch position is completed in step S206 (step S206, Yes), the process proceeds to step S207.

  In step S <b> 207, the flow path opening / closing processor 711 opens the first flow path 22. Subsequently, in step S208, the flow path opening / closing processing unit 711 checks whether or not the opening of the first flow path 22 has been completed. If the opening of the first flow path 22 has not been completed in step S208 (step S208, No), the process returns to step S207, and the processes after step S207 are performed. On the other hand, if the opening of the first flow path 22 has been completed in step S208 (step S202, Yes), the current process is terminated.

  Thereafter, in the molding processing unit 712, the first injection device 300 fills the cavity space 14 with the molding material from the first injection port 21. The molding processing unit 712 prohibits the injection of the molding material from the first injection device 300 to the first injection port 21 until it is confirmed that the opening of the first channel 22 and the closing of the second channel 24 are completed. Good. After confirming the completion of the opening of the first flow path 22, the molding material can be reliably injected from the first injection port 21 to the cavity space 14 by allowing the injection of the molding material from the first injection device 300 to the first injection port 21. Can be filled. In addition, by confirming the completion of the closing of the second flow path 24, the backflow of the molding material from the inside of the mold apparatus 10 to the second injection port 23 can be prevented.

  Further, according to FIG. 13, since the first injection device 300 is allowed to be injected after the second injection device 500 has been moved to the standby position, the first injection device 300 and the second injection The apparatus 500 can be prevented from simultaneously filling the cavity space 14 with the molding material, and the mold apparatus 10 can be prevented from being damaged.

(Deformation and improvement)
The embodiments of the injection molding machine have been described above, but the present invention is not limited to the above embodiments and the like, and various modifications are possible within the scope of the gist of the present invention described in the claims. Improvements are possible.

  The injection molding machine of the above embodiment may further include a third injection device in addition to the first injection device 300 and the second injection device 500. The number of injection devices may be four or more.

DESCRIPTION OF SYMBOLS 10 Mold apparatus 21 1st injection port 22 1st flow path 23 2nd injection port 24 2nd flow path 300 1st injection apparatus 310 Cylinder 400 1st movement apparatus 500 2nd injection apparatus 510 Cylinder 600 2nd movement apparatus 700 Control Device 711 Flow path opening / closing processing unit 712 Molding processing unit 713 Setup processing unit 714 Movement processing unit 715 Input operation detection unit 760 Display device 761 Operation screen 762 Setting field 763 Setting field

Claims (13)

A first injection device which is brought into contact with and separated from the first injection port of the mold apparatus and fills the cavity material from the first injection port through the first flow path;
A second injection device which is brought into contact with and separated from a second injection port different from the first injection port of the mold apparatus and fills the cavity space from the second injection port through a second flow path; ,
Controlling opening and closing of the first flow path and controlling opening and closing of the second flow path to open one of the first flow path and the second flow path and to open the first flow path and the second flow path A flow path opening / closing processing section for closing the other side of the path;
An injection molding machine comprising: a molding processing unit that controls a molding operation of filling the cavity space with a molding material from one of the first channel and the second channel opened by the channel opening / closing unit.   A setup processing unit for controlling the other setup of the first injection device and the second injection device while filling the cavity space with the molding material from one of the first injection device and the second injection device; The injection molding machine according to claim 1.   The setup processing unit is configured to use the first injection device and the second injection device based on a degree of continuous production in which one of the first injection device and the second injection device is used to repeatedly manufacture a molded product. The injection molding machine according to claim 2, wherein the other setup is controlled.   The injection molding machine according to claim 3, wherein the setup processing unit controls the setup timing based on the progress of the continuous production.   The injection molding machine according to claim 4, wherein the setup timing includes a start timing of a temperature raising process for raising the temperature of the cylinder to a molding temperature.   The injection molding machine according to claim 4 or 5, wherein the timing of the setup is controlled on the basis of the end timing of the continuous production.   The injection molding machine according to any one of claims 4 to 6, further comprising an operation screen provided with a setting field for inputting the setup timing in association with the progress of the continuous production.   The molding processing unit prohibits injection of a molding material from the first injection device to the first injection port until it is confirmed that the second channel is closed and the first channel is opened. Item 8. The injection molding machine according to any one of Items 1 to 7.   The molding processing unit prohibits injection of a molding material from the second injection device to the second injection port until it is confirmed that the first channel is closed and the second channel is opened. Item 9. The injection molding machine according to any one of Items 1 to 8.   One of the first injection device and the second injection device is controlled by controlling contact and separation of the first injection device with respect to the first injection port and controlling contact and separation of the second injection device with respect to the second injection port. The injection according to any one of claims 1 to 9, further comprising a movement processing unit that separates the mold device from the mold device and causes the other of the first injection device and the second injection device to touch the mold device. Molding machine. An input operation detection unit that detects a predetermined input operation,
When the input operation detection unit detects the predetermined input operation, the movement processing unit and the flow path opening / closing processing unit cooperate to perform a replacement process,
The replacement process is:
Separating the first injection device from the mold apparatus and closing the first flow path, touching the second injection apparatus to the mold apparatus and opening the second flow path;
And separating the second injection device from the mold device and closing the second flow path, touching the first injection device to the mold device and opening the first flow path,
The injection molding machine according to claim 10, comprising at least one of the following. A first injection device which is brought into contact with and separated from the first injection port of the mold apparatus and fills the cavity material from the first injection port through the first flow path;
A second injection device which is brought into contact with and separated from a second injection port different from the first injection port of the mold apparatus and fills the cavity space from the second injection port through a second flow path; ,
One of the first injection device and the second injection device is controlled by controlling contact and separation of the first injection device with respect to the first injection port and controlling contact and separation of the second injection device with respect to the second injection port. And a movement processing unit for touching the other of the first injection device and the second injection device to the mold device,
An injection processing unit that controls a molding operation of filling the cavity space with a molding material from the other of the first injection device and the second injection device touched to the mold device by the movement processing unit. Molding machine.   Controlling opening and closing of the first flow path and controlling opening and closing of the second flow path to open one of the first flow path and the second flow path and to open the first flow path and the second flow path The injection molding machine according to claim 12, further comprising a flow path opening / closing processing section that closes the other of the paths.

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