JP6786432B2 - Injection molding machine - Google Patents

Description

The present invention relates to an injection molding machine.

In the multicolor molding device described in Patent Document 1, after molding the first molded product by the first injection device, the second molded product is integrated with the first molded product by the second injection device to mold the multicolor molded product. To do.

Japanese Unexamined Patent Publication No. 7-144356

The two injection devices of the multicolor molding device are not versatile because they are used only in multicolor molding.

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 capable of efficiently using a plurality of injection devices in applications other than multicolor molding.

In order to solve the above problems, according to one aspect of the present invention,
A first injection device that is separated from the first injection port of the mold device and fills the cavity space from the first injection port via the first flow path, and a first injection device.
A second injection device that is brought into contact with and separated from a second injection port different from the first injection port of the mold device, and fills the cavity space with a molding material from the second injection port via a second flow path. ,
By controlling the opening and closing of the first flow path and the opening and closing of the second flow path, one of the first flow path and the second flow path is opened, and the first flow path and the second flow path are opened. A flow path opening / closing processing unit that blocks the other side of the road,
A molding processing unit that controls a molding operation of filling the cavity space with a molding material from one of the first flow path and the second flow path opened by the flow path opening / closing processing unit .
While the cavity space is filled with the molding material from one of the first injection device and the second injection device, the molding product is repeatedly manufactured using one of the first injection device and the second injection device. based on the progress of the production, it has a, a setup processing unit which controls the timing of the intake other stages of the first injection apparatus and the second injection device,
An injection molding machine is provided in which the timing of the setup includes the timing of starting the temperature raising process for raising the temperature of the cylinder to the molding temperature .

According to one aspect of the present invention, there is provided an injection molding machine capable of efficiently using a plurality of injection devices in applications other than multicolor molding.

It is a figure which shows the state at the time of completion of the mold opening of the injection molding machine by one Embodiment. It is a figure which shows the state at the time of mold clamping of the injection molding machine by one Embodiment. It is a figure which shows the state at the time when the 1st injection apparatus by one Embodiment performs a molding operation, and 2nd injection apparatus performs a setup. It is a figure which shows the state at the time when the 1st injection apparatus by 1 Embodiment performs setup, and 2nd injection apparatus performs a molding operation. It is a figure which shows the mold apparatus of FIG. 4 enlarged. It is a figure which shows the component of the control device by one Embodiment by a functional block. It is a figure which shows the relationship between the remaining shot of the 1st injection apparatus and the setup of a 2nd injection apparatus by one Embodiment. It is a figure which shows the operation screen used for setting the setup of the 2nd injection apparatus by one Embodiment. It is a figure which shows the relationship between the remaining shot of the 2nd injection apparatus and the setup of the 1st injection apparatus by one Embodiment. It is a figure which shows the operation screen used for setting the setup of the 1st injection apparatus by one Embodiment. It is a figure which shows the operation screen displayed on the display device by one Embodiment. It is a flowchart of the exchange process of the control device according to one Embodiment, and the injection device used for injection molding is changed from the 1st injection device to the 2nd injection device, 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 be replaced with. It is a flowchart of the replacement process of the control device according to one Embodiment, and the injection device used for injection molding is replaced from the 2nd injection device to the 1st injection device, and the flow path used for injection molding is changed from the 2nd flow path to the 1st flow path. It is a flowchart to be replaced with.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings, but in each drawing, the same or corresponding configurations will be referred to with the same or corresponding reference numerals and description thereof will be omitted.

(Injection molding machine)
FIG. 1 is a diagram showing a state at the time of completion of mold opening of the injection molding machine according to one embodiment. FIG. 2 is a diagram showing a state at the time of mold clamping of the injection molding machine according to one embodiment. In FIGS. 1 and 2, the X, Y, and Z directions are perpendicular to each other. The X and Y directions 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.

(Molding 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 forward, 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 backward.

The mold clamping device 100 closes, molds, and opens the mold of the mold apparatus 10. The mold clamping device 100 is, for example, a horizontal type, 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 conversion 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 facing the fixed platen 110.

By advancing and retreating the movable platen 120 with respect to the fixed platen 110, mold closing, mold clamping, and mold opening are performed. The mold device 10 is composed of the fixed mold 11 and the movable mold 12.

The toggle support 130 is connected to the fixed platen 110 at intervals, and is movably placed on the frame Fr 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 that of the guide 101 of the movable platen 120.

In the present 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, but the toggle support 130 is fixed to the frame Fr and the fixed platen. The 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 at intervals L in the mold opening / closing direction. A plurality of tie bars 140 (for example, four) 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 the 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 strain detector 141 is used for detecting the mold clamping force and the like.

In the present embodiment, the tie bar strain detector 141 is used as the 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, or the like, and the mounting position thereof is not limited to the tie bar 140.

The toggle mechanism 150 is arranged between the movable platen 120 and the toggle support 130, and moves the movable platen 120 with respect to the toggle support 130 in the mold opening / closing direction. The toggle mechanism 150 is composed of a crosshead 151, a pair of links, and the like. Each link group has a first link 152 and a second link 153 that are flexibly connected 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 bend and stretch, and the movable platen 120 moves back and forth with respect to the toggle support 130.

The configuration of the toggle mechanism 150 is not limited to the configurations shown in FIGS. 1 and 2. For example, in FIGS. 1 and 2, the number of nodes in each link group is 5, but it may be 4, and one end of the third link 154 is connected to the nodes of the first link 152 and the second link 153. May be done.

The mold clamping motor 160 is attached to the toggle support 130 and operates the toggle mechanism 150. The mold clamping motor 160 bends and stretches the first link 152 and the second link 153 by advancing and retracting the crosshead 151 with respect to the toggle support 130, and advances and retracts the movable platen 120 with respect 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 a linear motion of the crosshead 151. The motion conversion mechanism 170 includes a screw shaft 171 and a screw nut 172 screwed onto the screw shaft 171. A ball or roller may be interposed between the screw shaft 171 and the screw nut 172.

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

In the mold closing step, the mold clamping motor 160 is driven to advance the crosshead 151 to the mold closing completion position at a set speed, thereby advancing the movable platen 120 and touching the movable mold 12 with the fixed mold 11. The position and speed of the crosshead 151 are detected by 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 step, the mold clamping force 160 is further driven to further advance the crosshead 151 from the mold closing completion position to the mold clamping position to generate a mold clamping force. A cavity space 14 is formed between the movable mold 12 and the fixed mold 11 at the time of mold clamping, and either 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. The number of cavity spaces 14 may be plural, in which case a plurality of molded articles can be obtained at the same time.

In the mold opening step, the movable platen 120 is retracted by driving the mold clamping motor 160 to retract the crosshead 151 to the mold opening completion position at a set speed, and the movable mold 12 is separated from the fixed mold 11. After that, the ejector device 200 projects the molded product from the movable mold 12.

The setting conditions in the mold closing step and the mold clamping step 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 crosshead 151 in the mold closing step and the mold clamping step are collectively set as a series of setting conditions. The speed and position of the movable platen 120 may be set instead of the speed and position of the crosshead 151. Further, the mold clamping force may be set instead of the position of the crosshead (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 factor is also called the toggle magnification. The toggle magnification changes according to the angle θ (hereinafter, also referred to as “link angle θ”) formed by the first link 152 and the second link 153. 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 device 10 changes due to replacement of the mold device 10 or a temperature change of the mold device 10, the mold thickness is adjusted 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 at the time of the mold touch when the movable mold 12 touches the fixed mold 11. To adjust.

The mold clamping device 100 has a mold thickness adjusting mechanism 180 that adjusts the mold thickness by adjusting the distance L between the fixed platen 110 and the toggle support 130. The mold thickness adjusting mechanism 180 rotates the screw shaft 181 formed at the rear end of the tie bar 140, the screw nut 182 rotatably held by the toggle support 130, and the screw nut 182 screwed to the screw shaft 181. It has 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 transmission unit 185. A plurality of screw nuts 182 can be rotated in synchronization. It is also possible to individually rotate the plurality of screw nuts 182 by changing the transmission path of the rotation transmission unit 185.

The rotation transmission unit 185 is composed of, for example, gears. In this case, a passive gear is formed on the outer circumference 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 located at the center of the toggle support 130. It is held rotatably. The rotation transmission unit 185 may be composed of a belt, a pulley, or the like instead of the gear.

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 holds the screw nut 182 rotatably with respect to the fixed platen 110, and the fixed platen 110. Adjust the distance L from the toggle support 130.

In the present 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 to the fixed platen 110, but the present invention is not limited thereto.

For example, the screw nut 182 may be rotatably held relative to the fixed platen 110 and the tie bar 140 may be fixed 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 rotatably held 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 rotatably held relative 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 by using the mold thickness adjusting motor encoder 184. The mold thickness adjusting motor encoder 184 detects the rotation amount and the rotation direction of the mold thickness adjusting motor 183, and sends a signal indicating the detection result to the control device 700. The detection result of the mold thickness adjustment 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 the present embodiment has a screw shaft 181 formed on the tie bar 140 and a screw nut 182 screwed onto the screw shaft 181 in order to adjust the interval L. Not limited to.

For example, the mold thickness adjusting mechanism 180 may have 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 a plurality of tie bars 140 in cooperation with each other. The higher the temperature of the tie bar 140, the longer the tie bar 140 is due to thermal expansion, and the larger the interval L is. The temperatures 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 includes a cooler such as a water-cooled 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 type in which the mold opening / closing direction is horizontal, but may be a vertical type in which the mold opening / closing direction is vertical. The vertical mold clamping device includes a lower platen, an upper platen, a toggle support, a tie bar, a toggle mechanism, a mold clamping motor, and the like. One of the lower platen and the upper platen is used as a fixed platen, and the other one 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. A mold device is composed of a lower mold and an upper mold. The lower mold may be attached to the lower platen via a rotary table. The toggle support is located below the lower platen and is 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 to raise and lower the movable platen. The mold clamping motor operates the toggle mechanism. When the mold clamping device is vertical, the number of tie bars is usually three. The number of tie bars is not particularly limited.

The mold clamping device 100 of the present embodiment has a mold clamping motor 160 as a drive source, but may have a hydraulic cylinder instead of the mold clamping motor 160. Further, the mold clamping device 100 may have 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 moving direction of the movable platen 120 when the mold is closed (right direction in FIGS. 1 and 2) is set to 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 direction.

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

The ejector rod 230 is free to advance and retreat in the through hole of the movable platen 120. The front end portion of the ejector rod 230 comes into contact with the movable member 15 which is movably arranged inside the movable mold 12. 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 ejection step, the ejector motor 210 is driven to advance the ejector rod 230 from the standby position to the ejection position at a set speed, whereby the movable member 15 is advanced and the molded product is ejected. After that, 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 by using, for example, the ejector motor encoder 211. 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.

(1st injection device)
In the description of the first injection device 300, the direction in which the first injection device 300 is brought closer to the mold device 10 (the left direction in FIGS. 1 and 2) is forward, and the first injection device 300 is relative to the mold device 10. The direction of separation (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 with respect to the frame Fr, and is adjustable with respect to the mold device 10. The first injection device 300 touches the mold device 10 to fill the cavity space 14 in the mold device 10 with a molding material. The first injection device 300 includes, for example, a cylinder 310, a nozzle 320, a screw 330, a weighing motor 340, an injection motor 350, a pressure detector 360, and the like.

The cylinder 310 heats the molding material supplied internally from the supply port 311. The supply port 311 is formed at the rear 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. A heater 313 such as a band heater and a temperature detector 314 are provided on the outer periphery of the cylinder 310 in front of the cooler 312.

The cylinder 310 is divided into a plurality of zones in the axial direction of the cylinder 310 (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 detection temperature of the temperature detector 314 becomes the set temperature.

The nozzle 320 is provided at the front end of the cylinder 310 and is pressed against the mold device 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 detection temperature of the nozzle 320 reaches the set temperature.

The screw 330 is arranged in the cylinder 310 so as to be rotatable and retractable. 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. After that, when the screw 330 is advanced, the liquid molding material accumulated in front of the screw 330 is ejected from the nozzle 320 and filled in the mold apparatus 10.

A backflow prevention ring 331 is freely attached to the front portion of the screw 330 as a backflow prevention valve for preventing backflow of the molding material from the front to the rear 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 relative to the screw 330 up to the closing position (see FIG. 2) that blocks the flow path of the molding material. fall back. As a result, the molding material accumulated in the front of the screw 330 is prevented from flowing backward.

On the other hand, 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 when the screw 330 is rotated, and the opening position opens the flow path of the molding material. Advance relative to screw 330 to (see FIG. 1). As a result, the molding material is sent to the front of the screw 330.

The backflow prevention ring 331 may be either a co-rotation type that rotates with the screw 330 or a non-co-rotation 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 metering 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, for example, a hydraulic pump.

The injection motor 350 advances and retreats the screw 330. Between the injection motor 350 and the screw 330, a motion conversion mechanism or the like for converting the rotational motion of the injection motor 350 into the linear motion of the screw 330 is provided. The motion conversion mechanism has, for example, a screw shaft and a screw nut 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 advancing and retreating the screw 330 is not limited to the injection motor 350, and may be, for example, a hydraulic cylinder.

The pressure detector 360 detects the pressure transmitted between the injection motor 350 and the screw 330. The pressure detector 360 is provided in the force transmission path between the injection motor 350 and the screw 330 to detect 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 controlling and monitoring the pressure received by the screw 330 from the molding material, the back pressure on 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 step, a pressure holding step, a weighing step, 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 in the cavity space 14 in the mold apparatus 10. The position and speed of the screw 330 are detected using, for example, an 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. The position where V / P switching is performed is also called the V / P switching position. The set speed of the screw 330 may be changed according to the position and time of the screw 330.

After the position of the screw 330 reaches the set position in the filling step, 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 step, the injection motor 350 is driven to push the screw 330 forward, and the pressure of the molding material (hereinafter, also referred to as “holding pressure”) at the front end of the screw 330 is maintained at a set pressure in the cylinder 310. The remaining molding material is pushed toward the mold device 10. The shortage of molding material due to cooling shrinkage in the mold apparatus 10 can be replenished. The holding pressure 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. The set value of the holding pressure may be changed according to the elapsed time from the start of the holding pressure step and the like.

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

In the weighing step, the weighing motor 340 is driven to rotate the screw 330 at a set rotation 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 rotation speed of the screw 330 is detected by using, for example, a metering motor encoder 341. The metering motor encoder 341 detects the rotation of the metering motor 340 and sends a signal indicating the detection result to the control device 700.

In the weighing step, the injection motor 350 may be driven to apply a set back pressure to the screw 330 in order to limit the sudden retreat of the screw 330. The back pressure on 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 retracts to the weighing completion position and a predetermined amount of molding material is accumulated in front of the screw 330, the weighing process is completed.

The first injection device 300 of the present embodiment is an in-line screw type, but may be a pre-plastic type or the like. The pre-plastic injection device supplies the molded material melted in the plasticized cylinder to the injection cylinder, and injects the molding material from the injection cylinder into the mold device. A screw is rotatably or rotatably arranged in the plasticized cylinder and can be moved forward and backward, and a plunger is rotatably arranged in the injection cylinder.

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

(1st mobile device)
In the description of the first moving device 400, similarly to 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 set to the front, and the first 1 The direction in which the injection device 300 is separated from the mold device 10 (the right direction in FIGS. 1 and 2) will be described as the rear. Although 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, it may be arranged on both sides of the cylinder 310 and is arranged symmetrically with respect to the cylinder 310. May be done.

The first moving device 400 advances and retreats the first injection device 300 with respect to the mold device 10. Further, the first moving device 400 presses the nozzle 320 against the mold device 10 to generate 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 pump that can rotate in both directions, and by switching the rotation direction of the motor 420, the hydraulic fluid (for example, oil) is sucked from one of the first port 411 and the second port 412 and discharged from the other. To generate hydraulic pressure. The hydraulic pump 410 can also suck the hydraulic fluid from the tank and discharge the hydraulic 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 in the rotational direction and rotational torque according to the control signal from the control device 700. The motor 420 may be an electric motor or an electric servomotor.

The hydraulic cylinder 430 has a cylinder body 431, a piston 432, and a piston rod 433. The cylinder body 431 is fixed to the first injection device 300. The piston 432 divides the inside 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, so that 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 anterior chamber 435 functions as a pressure chamber that generates a 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 via the second flow path 402, so that 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 a 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 a linear motion of the first injection device 300 may be used.

(Control device)
As shown in FIGS. 1 and 2, 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. The control device 700 performs various controls by causing the CPU 701 to execute the program stored in the storage medium 702. Further, the control device 700 receives a signal from the outside through the input interface 703 and transmits the signal to the outside through the output interface 704.

The control device 700 repeatedly manufactures a molded product by repeatedly performing a mold closing step, a mold clamping step, a mold opening step, and the like. Further, the control device 700 performs a weighing step, a filling step, a pressure holding step, and the like during the mold clamping step. A series of operations for obtaining a molded product, for example, an operation from the start of a weighing process to the start of the next measuring process is also called a "shot" or a "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 the 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 in the operation device 750 under the control of the control device 700.

The operation screen is used for setting the injection molding machine and the like. Multiple operation screens are prepared and can be switched and displayed or displayed in an overlapping manner. The user sets the injection molding machine (including input of the set value) by operating the operation device 750 while looking at the operation screen displayed on the display device 760.

The operation device 750 and the display device 760 may be composed of, for example, a touch panel and may be integrated. Although the operation device 750 and the display device 760 of the present embodiment are integrated, they may be provided independently. Further, a plurality of operating devices 750 may be provided.

(Second injection device)
FIG. 3 is a diagram showing a state when the first injection device according to one embodiment performs a molding operation and the second injection device performs setup. FIG. 4 is a diagram showing a state when the first injection device according to the 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 device 10, and fills the cavity space 14 from the first injection port 21 via the first flow path 22. Further, the second injection device 500 is brought into contact with and separated from the second injection port 23 of the mold device 10, and the cavity space 14 is filled with the molding material from the second injection port 23 via the second flow path 24.

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 the movement direction is not particularly limited. For example, the moving direction of either the first injection device 300 or 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 is brought closer to the mold device 10 (lower direction in FIGS. 3 and 4) is forward, and the second injection device 500 is relative to the mold device 10. The direction of separation (upward direction in FIGS. 3 and 4) will be described as the rear.

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

The cylinder 510 heats the molding material supplied internally from the supply port. The supply port is formed at the rear 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 detection temperature of the temperature detector 514 reaches the set temperature.

The nozzle 520 is provided at the front end of the cylinder 510 and is pressed against the mold device 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 detection temperature of the nozzle 520 reaches the set temperature.

The screw 530 is rotatably and reciprocally arranged in the cylinder 510. Rotation of the screw 530 causes the molding material to be 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. The screw 530 is retracted as the liquid molding material is fed forward of the screw 530 and accumulated in the front of the cylinder 510. After that, when the screw 530 is advanced, the liquid molding material accumulated in front of the screw 530 is ejected from the nozzle 520 and filled in the mold apparatus 10.

A backflow prevention ring 531 is freely attached to the front portion of the screw 530 as a backflow prevention valve for preventing the backflow of the molding material from the front to the rear of the screw 530 when the screw 530 is pushed forward.

When the screw 530 is advanced, the backflow prevention ring 531 is pushed backward by the pressure of the molding material in front of the screw 530, and is relative to the screw 530 to a closed position (see FIG. 4) that blocks 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, 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 when the screw 530 is rotated, and the opening position opens the flow path of the molding material. Advance relative to screw 530 to (see FIG. 3). As a result, the molding material is sent to the front of the screw 530.

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

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

The metering 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, for example, a hydraulic pump.

The injection motor 550 advances and retreats the screw 530. Between the injection motor 550 and the screw 530, a motion conversion mechanism for converting the rotational motion of the injection motor 550 into the linear motion of the screw 530 is provided. The motion conversion mechanism has, for example, a screw shaft and a screw nut 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 forward and backward is not limited to the injection motor 550, and may be, for example, a hydraulic cylinder.

The pressure detector 560 detects the pressure transmitted between the injection motor 550 and the screw 530. The pressure detector 560 is provided in the force transmission path between the injection motor 550 and the screw 530 to detect 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 controlling and monitoring the pressure received by the screw 530 from the molding material, the back pressure on the screw 530, the pressure acting on the molding material from the screw 530, and the like.

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

In the filling step, 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 in the cavity space 14 in the mold apparatus 10. The position and speed of the screw 530 are detected by 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. The position where V / P switching is performed is also called the V / P switching position. The set speed of the screw 530 may be changed according to the position and time of the screw 530.

After the position of the screw 530 reaches the set position in the filling step, 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, the screw 530 may be moved forward or backward at a slow speed instead of stopping the screw 530.

In the pressure holding step, the injection motor 550 is driven to push the screw 530 forward, and the pressure of the molding material (hereinafter, also referred to as “holding pressure”) at the front end of the screw 530 is maintained at a set pressure and inside the cylinder 510. The remaining molding material is pushed toward the mold device 10. The shortage of molding material due to cooling shrinkage in the mold apparatus 10 can be replenished. The holding pressure 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. The set value of the holding pressure may be changed according to the elapsed time from the start of the holding pressure step and the like.

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

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

In the weighing step, the injection motor 550 may be driven to apply a set back pressure to the screw 530 in order to limit the sudden retreat of the screw 530. The back pressure on 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 retracts to the weighing completion position and a predetermined amount of molding material is accumulated in front of the screw 530, the weighing process is completed.

The second injection device 500 of the present embodiment is an in-line screw type, but may be a pre-plastic type or the like. The pre-plastic injection device supplies the molded material melted in the plasticized cylinder to the injection cylinder, and injects the molding material from the injection cylinder into the mold device. A screw is rotatably or rotatably arranged in the plasticized cylinder and can be moved forward and backward, and a plunger is rotatably arranged in the injection cylinder.

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

(Second mobile device)
In the description of the second moving device 600, similarly to the description of the second injection device 500, the direction in which the second injection device 500 is brought closer to the mold device 10 (lower direction in the middle of FIGS. 2 The direction in which the injection device 500 is separated from the mold device 10 (upward direction in FIGS. 3 and 4) will be described as the rear. Although the second moving device 600 is arranged on one side of the cylinder 510 of the second injection device 500 in FIGS. 3 and 4, it may be arranged on both sides of the cylinder 510 and is arranged symmetrically with respect to the cylinder 510. May be done.

The second moving device 600 advances and retreats 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, and by switching the rotation direction of the motor 620, the hydraulic fluid (for example, oil) is sucked from one of the first port 611 and the second port 612 and discharged from the other. To generate hydraulic pressure. The hydraulic pump 610 can also suck the hydraulic fluid from the tank and discharge the hydraulic 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 in the rotational direction and rotational torque according to the control signal from the control device 700. The motor 620 may be an electric motor or an electric servomotor.

The hydraulic cylinder 630 has a cylinder body 631, a piston 632, and a piston rod 633. The cylinder body 631 is fixed to the second injection device 500. The piston 632 divides the inside 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 to push the second injection device 500 forward. The second injection device 500 is advanced, and the nozzle 520 is pressed against the fixed mold 11. The anterior chamber functions as a pressure chamber that generates a 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, so that 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 a 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 a linear motion of the second injection device 500 may be used.

(Control device)
FIG. 6 is a diagram showing the components of the control device according to the embodiment as functional blocks. Each functional block shown in FIG. 6 is conceptual and does not necessarily have to be physically configured as shown. All or part of each functional block can be functionally or physically distributed / integrated in any unit. Each processing function performed in each function block may be realized by a program executed by a CPU, or as hardware by wired logic, in whole or in an arbitrary part thereof.

The control device 700 controls, for example, the opening and closing of the first flow path 22 connecting the first injection port 21 of the mold device 10 and the cavity space 14, and also controls the opening and closing of the second injection port 23 and the cavity space 14 of the mold device 10. It has a flow path opening / closing processing unit 711 that controls the opening / closing of the connecting second flow path 24. The flow path opening / closing processing unit 711 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.

The flow path opening / closing processing unit 711 controls the operation of the first flow path opening / closing device 30 that opens / closes the first flow path 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 injection port 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 injection port 21 into the cavity space 14 is prohibited.

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

When closing the first flow path 22, the flow path opening / closing processing unit 711 may confirm the completion of closing 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 closing is performed. The pressure in the chamber rises. It can be determined whether or not the closing of the first flow path 22 is completed based on whether or not the pressure in the closing chamber is equal to or higher than the threshold value.

Further, when the flow path opening / closing processing unit 711 opens the first flow path 22, the completion of opening of the first flow path 22 may be confirmed. 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 is stopped by the stopper 35, so that the pressure in the opening chamber rises when the fluid is continuously supplied to the opening chamber. It can be determined whether or not the opening of the first flow path 22 is completed based on whether or not the pressure in the opening chamber is equal to or higher than the threshold value.

The flow path opening / closing processing unit 711 controls the operation of the second flow path opening / closing device 40 that opens / closes the second flow path 24. When the second flow path opening / closing device 40 opens the second flow path 24, the molding material can be filled from the second injection port 23 into the cavity space 14. 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 injection port 23 into the cavity space 14 is prohibited.

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

When the flow path opening / closing processing unit 711 closes the second flow path 24, 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 hits the wall surface of the second flow path 24 and stops moving, and the piston of the fluid pressure cylinder 42 stops moving. Therefore, if the fluid is continuously supplied to the closing chamber, the closing is performed. The pressure in the chamber rises. It can be determined whether or not the closing of the second flow path 24 is completed based on whether or not the pressure in the closing chamber is equal to or higher than the threshold value.

Further, when the flow path opening / closing processing unit 711 opens 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 is stopped by the stopper 45, so that the pressure in the opening chamber rises when the fluid is continuously supplied to the opening chamber. It can be determined whether or not the opening of the second flow path 24 is completed based on whether or not the pressure in the opening chamber is equal to or higher than the threshold value.

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

The molding processing unit 712 may prohibit injection of the molding material from the first injection device 300 into the first injection port 21 until it is confirmed that the opening of the first flow path 22 and the closing of the second flow path 24 are completed. .. After confirming that the opening of the first flow path 22 is completed, the molding material is allowed to be injected from the first injection device 300 to the first injection port 21, so that the molding material can be reliably injected from the first injection port 21 into the cavity space 14. Can be filled. Further, by confirming that the second flow path 24 is completely closed, it is possible to prevent the backflow of the molding material from the inside of the mold apparatus 10 to the second injection port 23.

The molding processing unit 712 may prohibit injection of the molding material from the second injection device 500 into the second injection port 23 until it is confirmed that the opening of the second flow path 24 and the closing of the first flow path 22 are completed. .. After confirming that the opening of the second flow path 24 is completed, the molding material is allowed to be injected from the second injection device 500 to the second injection port 23, so that the molding material can be reliably injected from the second injection port 23 into the cavity space 14. Can be filled. Further, by confirming that the first flow path 22 is completely closed, it is possible to prevent the backflow of the molding material from the inside of the mold apparatus 10 to the first injection port 21.

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

In the present specification, 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, the description thereof will be omitted.

The setup includes, for example, a temperature raising process for raising the temperature of the cylinder 310 to the molding temperature, a purging 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 purging process may be different types of materials, for example materials of different colors. The operation of the first injection device 300 performed for the purge process is also referred to as a "purge operation".

The purging operation may include, for example, the rotation of the screw 330 and the advance / retreat of the screw 330, similar to 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 on the front of the cylinder 310, the screw 330 is retracted. After that, 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 device 10.

The purging operation may include only the rotation of the screw 330. By rotating the screw 330 at a fixed position, the molding material is sent 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.

By repeating the purge operation, the purge process is performed. The purging operation is performed intermittently or continuously.

The purge process is started after the completion of 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 room temperature or a heat retention 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 deterioration of the molding material inside the cylinder 310. While the temperature of the cylinder 310 is room temperature or the heat retention temperature, neither the molding operation nor the purging operation is performed. The purging 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, an operation of the purge permission button) by the user is performed. The purge process may be automatically started after the temperature of the cylinder 310 reaches a predetermined temperature without waiting for a user command.

As shown in FIG. 6, the control device 700 of 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. It may have a setup processing unit 713 that controls the other setup. While one injection device repeats the molding operation of manufacturing a molded product, another injection device can automatically perform the setup. Therefore, it is possible to shorten the time for interrupting the production of the molded product in order to change the type of the molding material to be filled in the mold apparatus 10.

The setup processing unit 713 uses one of the first injection device 300 and the second injection device 500 to repeatedly manufacture the molded product, based on the progress of continuous production, the first injection device 300 and the second injection device 500. You may control the other setup of. 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, for example, the timing of setup based on the progress of continuous production. The setup timings are (A) the timing of starting the temperature raising process for raising the temperature of the cylinder to the molding temperature, (B) the timing of ending the temperature raising process of the cylinder, and (C) the timing of starting the purge process. (D) At least one of the timings of the end of the purge process may be included.

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

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 showing the relationship between the remaining shots of the first injection device and the setup of the second injection device according to the 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 “the first”. 2 The temperature rise process of the injection device 500 ”) is started. Further, the setup processing unit 713 completes the temperature raising process of the second injection device 500 by the time 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 purging process of the second injection device 500. Furthermore, the setup processing unit 713 completes the purging process of the second injection device 500 by the time the number of remaining shots of the first injection device 300 reaches N4 (N4 <N3). As a result, the setup of the second injection device 500 can be completed by the end of the continuous production by the first injection device 300.

FIG. 8 is a diagram showing 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 sets up 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 timing of starting the temperature raising process of the second injection device 500. Therefore, the temperature raising process of the second injection device 500 can be started according to 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 completed before the end of the continuous production by the first injection device 300.

The setup processing unit 713 is continuously produced by the first injection device 300 based on the start timing of the temperature raising process of the second injection device 500 input to the setting field 762 and the temperature rising pattern of the temperature rising process. Before the end, it may be determined whether or not the temperature raising process of the second injection device 500 is completed.

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 to the setting field 762 so that the temperature rising process is completed. The timing may be corrected.

Further, the setup processing unit 713 may output an alarm when it is determined that the temperature raising process of the second injection device 500 is not completed before the end of the 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 timing of starting 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, and (D) the timing of the end of the purge process of the second injection device 500. And so on. Multiple timings may be set.

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

When the timing for starting 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. As a result, the purging process of the second injection device 500 can be completed before the end of the continuous production by the first injection device 300.

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 purging process of the second injection device 500 at the calculated timing. In this case as well, the purging process of the second injection device 500 can be completed before the end of the continuous production by the first injection device 300.

The setup timing input to the setting field 762 may be set based on the timing of the end of continuous production by the first injection device 300, and may be set by, for example, the number of remaining shots or the remaining time. 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. Further, efficiency can be improved 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 too early than the end of continuous production by the first injection device 300, the setup is wasted and a purging process or the like is required again. The setup timing of the second injection device 500 may be set so that the waiting 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 showing the relationship between the remaining shots of the second injection device and the setup of the first injection device according to the 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 “the first”. 1) The temperature rise process of the injection device 300 ”) is started. Further, the setup processing unit 713 finishes the temperature raising process of the first injection device 300 by the time 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 device 500 reaches N3 (N3 <N2), the setup processing unit 713 starts the purging process of the first injection device 300. Furthermore, the setup processing unit 713 completes the purging process of the first injection device 300 by the time the number of remaining shots of the second injection device 500 reaches N4 (N4 <N3). As a result, the setup of the first injection device 300 can be completed by the end of continuous production by the second injection device 500.

FIG. 10 is a diagram showing 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 sets up 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 timing of starting the temperature raising process of the first injection device 300. Therefore, the temperature raising process of the first injection device 300 can be started according to 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 end of continuous production by the second injection device 500.

The setup processing unit 713 is continuously produced by the second injection device 500 based on the start timing of the temperature rise process of the first injection device 300 input to the setting field 763 and the temperature rise pattern of the temperature rise process. Before the end, it may be determined whether or not the temperature raising process of the first injection device 300 is completed.

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 to the setting field 763 so that the temperature rising process is completed. The timing may be corrected.

Further, the setup processing unit 713 may output an alarm when it is determined 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 timing of starting the temperature raising process of the first injection device 300. For example, (B) the timing of the end of the temperature raising process of the first injection device 300, (C) the timing of the start of the purge process of the first injection device 300, and (D) the timing of the end of the purge process of the first injection device 300. And so on. Multiple timings may be set.

When the timing of the end of the temperature raising process of the first injection device 300 is set, the setup processing unit 713 calculates the timing of the start of the temperature rising 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. In this case as well, the temperature raising process of the first injection device 300 can be completed before the end of continuous production by the second injection device 500.

When the timing for starting 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. As a result, the purging process of the first injection device 300 can be completed before the end of continuous production by the second injection device 500.

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 purging process of the first injection device 300 at the calculated timing. In this case as well, the purging process of the first injection device 300 can be completed before the end of continuous production by the second injection device 500.

The setup timing input to the setting field 763 may be set based on the timing of the end of continuous production by the second injection device 500, and may be set by, for example, 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. Further, efficiency can be improved 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 too early than the end of continuous production by the second injection device 500, the setup is wasted 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 waiting 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. It may have part 714. 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 touches the other of the first injection device 300 and the second injection device 500 to the mold device 10. .. The molding processing unit 712 controls a 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 touched by the moving processing unit 714 to the mold device 10. It is possible to prevent the first injection device 300 and the second injection device 500 from filling the cavity space 14 with the molding material at the same time, and it is possible to prevent damage to the mold device 10.

When the first injection device 300 is brought close to the mold device 10, the moving processing unit 714 may confirm the completion of the approach, and the nozzle 320 of the first injection device 300 is the first injection port of the mold device 10. You may confirm that it is at the nozzle touch position (see FIG. 3) that touches 21. For the confirmation, for example, the 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 the signal only when the first injection device 300 is present at the nozzle touch position, or may output the signal only when the first injection device 300 is not present at the nozzle touch position. .. Further, the presence detector 721 may output different signals depending on whether the first injection device 300 is present at the nozzle touch position and the first injection device 300 is not present at the nozzle touch position.

Further, when the first injection device 300 is separated 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 the first of the mold device 10. It may be confirmed that it is in the standby position (see FIG. 4) away from the injection port 21. For the confirmation, for example, the 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 is in the standby position, or may output a signal only when the first injection device 300 is not in the standby position. Further, the presence detector 722 may output different signals depending on whether the first injection device 300 is present in the standby position or the first injection device 300 is not in the standby position.

In order to detect the position of the first injection device 300, the presence detectors 721 and 722 are used in the present embodiment, but the present invention is not limited to this. For example, when the first moving device 400 has an electric motor and a motion conversion mechanism that converts the rotational motion of the electric motor into a linear motion of the first injection device 300, an encoder that detects the rotation of the electric motor is used. 1 The position of the injection device 300 may be detected.

When the second injection device 500 is brought closer to the mold device 10, the moving processing unit 714 may confirm the completion of the approach, and the nozzle 520 of the second injection device 500 is the second injection port of the mold device 10. It may be confirmed that it is at the nozzle touch position (see FIG. 4) that touches 23. For the confirmation, for example, the 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 the signal only when the second injection device 500 is present at the nozzle touch position, or may output the signal only when the second injection device 500 is not present at the nozzle touch position. .. Further, the presence detector 723 may output different signals depending on whether the second injection device 500 is present at the nozzle touch position and the second injection device 500 is not present at the nozzle touch position.

Further, when the second injection device 500 is separated 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 the second of the mold device 10. It may be confirmed that it is in the standby position (see FIG. 3) away from the injection port 23. For the confirmation, for example, the 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 is in the standby position, or may output a signal only when the second injection device 500 is not in the standby position. Further, the presence detector 724 may output different signals depending on whether the second injection device 500 is present in the standby position or the second injection device 500 is not in the standby position.

In order to detect the position of the second injection device 500, the presence detectors 723 and 724 are used in the present embodiment, but the present invention is not limited thereto. 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 a linear motion of the second injection device 500, an encoder that detects the rotation of the electric motor is used. 2 The position of the injection device 500 may be detected.

The movement processing unit 714 and the flow path opening / closing processing unit 711 cooperate with each other to perform replacement processing for 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 device 500 is touched by the mold device 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 device 300 is touched by the mold device 10 and the first flow path 22 is opened.

As shown in FIG. 6, the control device 700 may have 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 processing.

FIG. 11 is a diagram showing an operation screen displayed on the display device according to the embodiment. The operation screen 761 shown in FIG. 11 has an operation button 764 that accepts a predetermined input operation for performing the above-mentioned replacement process.

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

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 the replacement process of the control device according to the embodiment, wherein the injection device used for injection molding is replaced from the first injection device to the second injection device, and the flow path used for injection molding is from the first flow path. It is a flowchart of switching to the 2nd flow path.

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

In step S101, the flow path opening / closing processing unit 711 closes the first flow path 22. Subsequently, in step S102, the flow path opening / closing processing unit 711 confirms whether or not the closing of the first flow path 22 is completed. If the closing of the first flow path 22 is not completed in step S102 (steps S102, No), the process returns to step S101 and the processes after step S101 are performed. The processing after step S103 may be prohibited until the completion of blocking of the first flow path 22 is confirmed. On the other hand, when the closing of the first flow path 22 is completed in step S102 (steps 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 confirms whether or not the movement of the first injection device 300 to the standby position is completed. If the movement of the first injection device 300 to the standby position is not completed in step S104 (step S104, No), the process returns to step S103 and the processes after step S103 are performed. The processing after step S105 may be prohibited until the completion of the movement of the first injection device 300 to the standby position is confirmed. 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 confirms whether or not the movement of the second injection 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 (step S106, No), the process returns to step S105 and the processes after step S105 are performed. The processing after step S107 may be prohibited until the completion of the movement of the second injection device 500 to the nozzle touch position is confirmed. On the other hand, when the movement of the second injection device 500 to the nozzle touch position is completed in step S106 (step S106, Yes), the process proceeds to step S107.

In step S107, 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 confirms whether or not the opening of the second flow path 24 is completed. If the opening of the second flow path 24 is not completed in step S108 (steps 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.

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

Further, according to FIG. 12, since the injection of the second injection device 500 is permitted after the movement of the first injection device 300 to the standby position is completed, the first injection device 300 and the second injection are allowed. It is possible to prevent the device 500 from filling the cavity space 14 with the molding material at the same time, and to prevent damage to the mold device 10.

FIG. 13 is a flowchart of the replacement process of the control device according to the embodiment, wherein the injection device used for injection molding is replaced from the second injection device to the first injection device, and the flow path used for injection molding is from the second flow path. It is a flowchart of switching to the 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. The order of each step shown in FIG. 13 is an example, and is not particularly limited to the order shown in FIG.

In step S201, the flow path opening / closing processing unit 711 closes the second flow path 24. Subsequently, in step S202, the flow path opening / closing processing unit 711 confirms whether or not the closing of the second flow path 24 is completed. If the closing of the second flow path 24 is not completed in step S202 (steps S202, No), the process returns to step S201 and the processes after step S201 are performed. The processing after step S203 may be prohibited until the completion of blocking of the second flow path 24 is confirmed. On the other hand, when the closing 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 confirms whether or not the movement of the second injection device 500 to the standby position is completed. If the movement of the second injection device 500 to the standby position is not completed in step S204 (step S204, No), the process returns to step S203 and the processes after step S203 are performed. The processing after step S205 may be prohibited until the completion of the movement of the second injection device 500 to the standby position is confirmed. 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 confirms whether or not the movement of the first injection device 300 to the nozzle touch position is completed. If the movement of the first injection device 300 to the nozzle touch position is not completed in step S206 (step S206, No), the process returns to step S205 and the processes after step S205 are performed. The processing after step S207 may be prohibited until it is confirmed that the movement of the first injection device 300 to the nozzle touch position is completed. 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 S207, the flow path opening / closing processing unit 711 opens the first flow path 22. Subsequently, in step S208, the flow path opening / closing processing unit 711 confirms whether or not the opening of the first flow path 22 is completed. If the opening of the first flow path 22 is not completed in step S208 (steps S208, No), the process returns to step S207 and the processes after step S207 are performed. On the other hand, when the opening of the first flow path 22 is completed in step S208 (step S202, Yes), the current process is terminated.

After that, the molding processing unit 712 fills the cavity space 14 with the molding material from the first injection port 21 by the first injection device 300. The molding processing unit 712 prohibits injection of the molding material from the first injection device 300 into the first injection port 21 until it is confirmed that the opening of the first flow path 22 and the closing of the second flow path 24 are completed. Good. After confirming that the opening of the first flow path 22 is completed, the molding material is allowed to be injected from the first injection device 300 to the first injection port 21, so that the molding material can be reliably injected from the first injection port 21 into the cavity space 14. Can be filled. Further, by confirming that the second flow path 24 is completely closed, it is possible to prevent the backflow of the molding material from the inside of the mold apparatus 10 to the second injection port 23.

Further, according to FIG. 13, since the injection of the first injection device 300 is permitted after the movement of the second injection device 500 to the standby position is completed, the first injection device 300 and the second injection It is possible to prevent the device 500 from filling the cavity space 14 with the molding material at the same time, and to prevent damage to the mold device 10.

(Transformation and improvement)
Although the embodiments of the injection molding machine have been described above, the present invention is not limited to the above-described embodiments and the like, and various modifications are made within the scope of the gist of the present invention described in the claims. It can be improved.

The injection molding machine of the above embodiment may further have 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.

10 Mold device 21 1st injection port 22 1st flow path 23 2nd injection port 24 2nd flow path 300 1st injection device 310 Cylinder 400 1st moving device 500 2nd injection device 510 Cylinder 600 2nd moving device 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 column 763 Setting column

Claims (9)

A first injection device that is separated from the first injection port of the mold device and fills the cavity space from the first injection port via the first flow path, and a first injection device.
A second injection device that is brought into contact with and separated from a second injection port different from the first injection port of the mold device, and fills the cavity space with a molding material from the second injection port via a second flow path. ,
By controlling the opening and closing of the first flow path and the opening and closing of the second flow path, one of the first flow path and the second flow path is opened, and the first flow path and the second flow path are opened. A flow path opening / closing processing unit that blocks the other side of the road,
A molding processing unit that controls a molding operation of filling the cavity space with a molding material from one of the first flow path and the second flow path opened by the flow path opening / closing processing unit .
While the cavity space is filled with the molding material from one of the first injection device and the second injection device, the molding product is repeatedly manufactured using one of the first injection device and the second injection device. based on the progress of the production, it has a, a setup processing unit which controls the timing of the intake other stages of the first injection apparatus and the second injection device,
The setup timing includes an injection molding machine including a timing of starting a temperature raising process for raising the temperature of the cylinder to the molding temperature . The timing of the intake stage is controlled based on the timing of completion of the continuous production, an injection molding machine according to claim 1. The injection molding machine according to claim 1 or 2 , further comprising an operation screen provided with a setting field for inputting the timing of the setup in association with the progress of the continuous production. The molding processing unit prohibits injection of the molding material from the first injection device into the first injection port until the completion of closing of the second flow path and the completion of opening of the first flow path are confirmed. The injection molding machine according to any one of items 1 to 3 . The molding processing unit prohibits injection of the molding material from the second injection device into the second injection port until it confirms that the first flow path has been closed and the second flow path has been opened. The injection molding machine according to any one of items 1 to 4 . One of the first injection device and the second injection device by controlling the contact and separation of the first injection device with respect to the first injection port and controlling the contact and separation of the second injection device with respect to the second injection port. The invention according to any one of claims 1 to 5 , further comprising a moving processing unit that separates the first injection device from the mold device and touches the other of the first injection device and the second injection device to the mold device. Injection molding machine. It has 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 replacement processing.
The replacement process is
To separate the first injection device from the mold device and block the first flow path, and to touch the second injection device to the mold device and open the second flow path.
Then, the second injection device is separated from the mold device and the second flow path is closed, and the first injection device is touched by the mold device and the first flow path is opened. The injection molding machine according to claim 6 , which comprises at least one of the above. A first injection device that is separated from the first injection port of the mold device and fills the cavity space from the first injection port via the first flow path, and a first injection device.
A second injection device that is brought into contact with and separated from a second injection port different from the first injection port of the mold device, and fills the cavity space with a molding material from the second injection port via a second flow path. ,
One of the first injection device and the second injection device by controlling the contact and separation of the first injection device with respect to the first injection port and controlling the contact and separation of the second injection device with respect to the second injection port. With a moving processing unit that touches the mold device and separates the other of the first injection device and the second injection device from the mold device.
A forming section for controlling the molding operation of filling the molding material into the cavity from one of said being touched first injection unit and said second injection unit to the mold apparatus by the movement processing unit,
While the cavity space is filled with the molding material from one of the first injection device and the second injection device, the molding product is repeatedly manufactured using one of the first injection device and the second injection device. based on the progress of the production, it has a, a setup processing unit which controls the timing of the intake other stages of the first injection apparatus and the second injection device,
The setup timing includes an injection molding machine including a timing of starting a temperature raising process for raising the temperature of the cylinder to the molding temperature . By controlling the opening and closing of the first flow path and the opening and closing of the second flow path, one of the first flow path and the second flow path is opened, and the first flow path and the second flow path are opened. The injection molding machine according to claim 8 , further comprising a flow path opening / closing processing unit that closes the other side of the path.

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