JP2018167452A - Injection molding machine - Google Patents

Abstract

To provide an injection molding machine capable of improving efficiency of maintenance work of a vertical injection device that charges a molding material from above to inside a mold device.SOLUTION: The injection molding machine includes: a mold clamping device 100 that performs mold closing, mold clamping and mold opening of a mold device; an injection device 500 for filling the mold device with molding material from above; and a support mechanism 800 for movably supporting the injection device 500 with respect to the mold clamping device. The injection device 500 includes: a cylinder in which the molding material is melted; and a nozzle 520 for filling the mold device with the molding material melted in the cylinder. The support mechanism 800 supports the injection device 500 movable to an injection molding position where the injection device 500 fills the mold device with the molding material and to a retracted position where the nozzle 520 does not overlap with the mold clamping device 100 as viewed in the vertical direction.SELECTED DRAWING: Figure 6

Description

  The present invention relates to an injection molding machine.

  An injection molding machine described in Patent Literature 1 includes an injection device base having a pivot pin, and a turning support member that supports the injection device base so that the injection device base can turn at least between a horizontal direction and a vertical direction. Prepare. The injection device base holds the injection device. When the mold is filled with resin from the injection device, the injection device base is placed in a vertical state. On the other hand, when the injection device is installed in the injection molding machine or separated from the injection molding machine, the injection device base is placed in a horizontal state and suspended by a crane or the like. The injection device is installed in the injection molding machine or separated from the injection molding machine together with the injection device machine base in a horizontal state.

Japanese Patent Application Laid-Open No. 2006-159595

  According to the technique described in Patent Document 1, the injection device can be turned between a horizontal state and a vertical state with the injection device installed in the injection molding machine. The injection device is a vertical injection device that can be filled with resin from the upper surface of the mold.

  However, in a state where the injection device is installed in the injection molding machine, the cylinder and nozzle of the injection device are arranged above the mold clamping device.

  Therefore, when performing the maintenance work of the injection device with the injection device installed in the injection molding machine, the operator either enters the inside of the mold clamping device or works outside the mold clamping device (for example, a safety door). The operator would reach out from the outside of the cover to the upper side of the mold clamping device. Therefore, the access to the injection device is poor and the work efficiency is poor.

  The present invention has been made in view of the above problems, and mainly provides an injection molding machine that can improve the efficiency of maintenance work of a vertical injection apparatus that fills a molding material from above the mold apparatus. With a purpose.

In order to solve the above problems, according to one aspect of the present invention,
A mold clamping device for closing, clamping and opening the mold device;
An injection device for filling the molding device with a molding material from above;
A support mechanism for movably supporting the injection device with respect to the mold clamping device,
The injection device includes a cylinder in which the molding material is melted, and a nozzle that fills the mold device with the molding material melted in the cylinder.
The support mechanism moves the injection device between an injection molding position where the injection device fills the mold material with the molding material and a retreat position where the nozzle does not overlap the mold clamping device when viewed in a vertical direction. An injection molding machine is provided that supports it.

  According to one aspect of the present invention, there is provided an injection molding machine that can improve the efficiency of maintenance work of a vertical injection apparatus that fills a molding material from above a mold apparatus.

It is a figure which shows the state at the time of mold opening completion of the injection molding machine by one Embodiment. It is a figure which shows the state at the time of the mold clamping of the injection molding machine by one Embodiment. It is a figure which shows the nozzle touch state of the injection apparatus provided above the mold clamping apparatus by one Embodiment. It is a figure which shows the nozzle touch cancellation | release state of the injection device of FIG. It is the figure which looked at the state when the injection device by one embodiment exists in an injection molding position and a standby position from the upper part. It is the figure which looked at the state when the injection device by one embodiment is in a retreat position from the upper part. It is a figure which shows the nozzle touch cancellation | release state of the injection apparatus provided above the mold clamping apparatus by a 1st modification. It is the figure which looked at the state when the injection device by the 1st modification exists in an injection molding position and a standby position from the upper part. It is the figure which looked at the state when the injection device by the 1st modification is in a retreat position from the upper part. It is a figure which shows the nozzle touch cancellation | release state of the injection apparatus provided above the mold clamping apparatus by a 2nd modification. It is the figure which looked at the state when the injection device by the 2nd modification is in an injection molding position and a standby position from the upper part. It is the figure which looked at the state when the injection device by the 2nd modification is in a retreat position from the upper part. It is a figure which shows the nozzle touch cancellation | release state of the injection apparatus provided above the mold clamping apparatus by a 3rd modification. It is the figure which looked at the state when the injection device by a 3rd modification exists in an injection molding position and a standby position from the upper part. It is the figure which looked at the state when the injection device by the 3rd modification is in a retreat position from the upper part.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In each of the drawings, the same or corresponding components are denoted by the same or corresponding reference numerals, and description thereof will be omitted. In this specification, one of “X axis”, “Y axis”, and “Z axis” (for example, “Z axis”) is read as “first”, and the other one (for example, “X axis”). ") May be read as" second ", and the remaining one (for example," Y-axis ") may be read as" third ". For example, the Z-axis support portion 810 corresponds to the first support portion described in the claims, and the X-axis support portion 820 corresponds to the second support portion described in the claims.

(Injection molding machine)
FIG. 1 is a diagram illustrating a state when mold opening of an injection molding machine according to an embodiment is completed. FIG. 2 is a diagram illustrating a state during mold clamping of the injection molding machine according to the embodiment. In FIG. 1 and FIG. 2, the illustration of the injection device 500, the moving device 600, and the support mechanism 800 shown in FIG. As shown in FIGS. 1 to 2, the injection molding machine includes a mold clamping device 100, an ejector device 200, an injection device 300, a moving device 400, an injection device 500 (see FIG. 3), and a moving device 600 ( 3), a control device 700, and a support mechanism 800 (see FIG. 3). Hereinafter, each component of the injection molding machine will be described.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

(Injection device)
In the description of the injection device 300, unlike the description of the mold clamping device 100 and the description of the ejector device 200, the moving direction of the screw 330 during filling (the left direction in FIGS. 1 and 2) is the front, and the screw 330 during weighing is used. The moving direction (right direction in FIGS. 1 and 2) will be described as the rear.

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

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

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

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

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

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

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

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

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

  The injection device 300 may have a drive source that causes the backflow prevention ring 331 to advance and retreat between the open position and the closed position with respect to the screw 330.

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

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

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

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

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

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

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

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

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

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

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

  In addition, although the injection apparatus 300 of this embodiment is an inline screw system, a pre-plastic system etc. may be sufficient. A pre-plastic injection device supplies a molding material melted in a plasticizing cylinder to the injection cylinder, and injects the molding material from the injection cylinder into a mold device. In the plasticizing cylinder, a screw is rotatably or rotatably and reciprocally disposed, and in the injection cylinder, a plunger is reciprocally disposed.

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

(Moving device)
In the description of the moving device 400, similarly to the description of the injection device 300, the moving direction of the screw 330 during filling (the left direction in FIGS. 1 and 2) is the front, and the moving direction of the screw 330 during weighing (see FIGS. 1 and 2). In the following description, the right direction in FIG.

  The moving device 400 moves the injection device 300 forward and backward with respect to the mold device 10. Further, the moving device 400 presses the nozzle 320 against the mold device 10 to generate a nozzle touch pressure. The moving device 400 includes a hydraulic pump 410, a motor 420 as a drive source, a hydraulic cylinder 430 as a hydraulic actuator, and the like.

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

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

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

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

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

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

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

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

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

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

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

(Injection device and moving device provided above the mold clamping device)
FIG. 3 is a diagram illustrating a nozzle touch state of the injection device provided above the mold clamping device according to the embodiment. FIG. 4 is a diagram illustrating a nozzle touch release state of the injection apparatus of FIG. 3 and 4, the X direction, the Y direction, and the Z direction are directions perpendicular to each other. The X direction represents the mold opening / closing direction. When the mold clamping device is a horizontal mold, the Z direction represents the vertical direction, and the X direction and the Y direction represent the horizontal direction.

(Injection device)
The injection device 500 is moved up and down with respect to the fixed platen 110. The injection apparatus 500 touches the mold apparatus 10 and fills the mold apparatus 10 with a molding material from above. The injection device 500 includes, for example, a cylinder 510, a nozzle 520, a screw 530, a metering motor 540, an injection motor 550, a pressure detector 560, and the like.

  The injection device 500 is a saddle type in which the axial direction of the cylinder 510 is the vertical direction. The injection apparatus 500 includes a cylinder 510 in which the molding material is melted, and a nozzle 520 that fills the mold apparatus 10 with the molding material melted in the cylinder 510. On the other hand, the injection device 300 shown in FIGS. 1 and 2 is a horizontal type in which the axial direction of the cylinder 310 is the horizontal direction. The vertical injection device 500 is used together with the horizontal injection device 300, but may be used alone.

  The cylinder 510 heats the molding material supplied to the inside from the supply port 511. The supply port 511 is formed in the upper part of the cylinder 510. A cooler 512 such as a water-cooled cylinder is provided on the outer periphery of the upper portion of the cylinder 510. Below the cooler 512, a heater 513 such as a band heater and a temperature detector 514 are provided on the outer periphery of the cylinder 510.

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

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

  The screw 530 is disposed in the cylinder 510 so as to be rotatable and movable up and down. When the screw 530 is rotated, the molding material is sent downward along the spiral groove of the screw 530. The molding material is gradually melted by the heat from the cylinder 510 while being sent downward. As the liquid molding material is fed below the screw 530 and accumulated in the lower part of the cylinder 510, the screw 530 is raised. Thereafter, when the screw 530 is lowered, the liquid molding material accumulated below the screw 530 is injected from the nozzle 520 and filled in the mold apparatus 10.

  A backflow prevention ring 531 is attached to the lower portion of the screw 530 as a backflow prevention valve that prevents backflow of the molding material from the bottom of the screw 530 upward when the screw 530 is pushed downward.

  When the screw 530 is lowered, the backflow prevention ring 531 is pushed upward by the pressure of the molding material below the screw 530 and is relatively relative to the screw 530 to the closed position (see FIG. 3) that closes the flow path of the molding material. To rise. This prevents the molding material accumulated under the screw 530 from flowing back upward.

  On the other hand, the backflow prevention ring 531 is pushed downward by the pressure of the molding material sent downward along the spiral groove of the screw 530 when the screw 530 is rotated, and is an open position where the flow path of the molding material is opened. (Refer to FIG. 4) It descends relative to the screw 530. As a result, the molding material is sent below the screw 530.

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

  The injection device 500 may have a drive source that moves the backflow prevention ring 531 up and down between the open position and the closed position with respect to the screw 530.

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

  The injection motor 550 moves the screw 530 up and down. Between the injection motor 550 and the screw 530, a motion conversion mechanism that converts the rotational motion of the injection motor 550 into the linear motion of the screw 530 is provided. The motion conversion mechanism includes, for example, a screw shaft and a screw nut that is screwed onto the screw shaft. A ball, a roller, or the like may be provided between the screw shaft and the screw nut. The drive source for raising and lowering the screw 530 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 a force transmission path between the injection motor 550 and the screw 530 and detects the pressure acting on the pressure detector 560.

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

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

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

  In addition, after the position of the screw 530 reaches the set position in the filling process, the screw 530 may be temporarily stopped at the set position, and then V / P switching may be performed. Immediately before the V / P switching, instead of stopping the screw 530, the screw 530 may be slightly lowered or slightly raised.

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

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

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

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

  In addition, although the injection apparatus 500 of this embodiment is an inline screw system, a pre-plastic system etc. may be sufficient. A pre-plastic injection device supplies a molding material melted in a plasticizing cylinder to the injection cylinder, and injects the molding material from the injection cylinder into a mold device. A screw is disposed in the plasticizing cylinder so as to be rotatable or freely rotatable, and a plunger is disposed in the injection cylinder so as to be movable up and down.

(Moving device)
The moving device 600 moves the injection device 500 up and down with respect to the fixed platen 110. Further, the moving device 600 presses the nozzle 520 against the mold device 10 to generate a nozzle touch pressure. The moving device 600 includes an injection device moving motor 610, a motion conversion mechanism 620 that converts the rotational motion of the injection device moving motor 610 into a linear motion (elevating motion) of the injection device 500, and the like. The motion conversion mechanism 620 includes a screw shaft 621 and a screw nut 622 that is screwed into the screw shaft 621. A ball or a roller may be interposed between the screw shaft 621 and the screw nut 622.

  For example, the injection device moving motor 610 is attached to a Z-axis slider 812, which will be described later, the screw shaft 621 is rotatably supported by the Z-axis slider 812, and the screw nut 622 is fixed to a spine frame 813, which will be described later. When the injection device moving motor 610 is driven to rotate the screw shaft 621, the screw shaft 621 moves up and down, and the injection device 500 moves up and down relative to the fixed platen 110.

  The injection device moving motor 610 of this embodiment is attached to the Z-axis slider 812, but may be attached to the spine frame 813. In this case, the screw shaft 621 may be rotatably supported with respect to the spine frame 813, and the screw nut 622 may be fixed to the Z-axis slider 812. When the injection device moving motor 610 is driven to rotate the screw shaft 621, the screw nut 622 moves up and down, and the injection device 500 moves up and down with respect to the fixed platen 110.

(Support mechanism)
The support mechanism 800 supports the injection device 500 so as to be movable with respect to the mold clamping device 100. The movement of the injection device 500 relative to the mold clamping device 100 may be automatic or manual.

  For example, the support mechanism 800 supports the mold clamping device 100 so that the injection device 500 can move in the Z direction, and supports the mold clamping device 100 so that the injection device 500 can move in the X direction. And an X-axis support portion 820.

  The Z-axis support portion 810 includes, for example, a pair of Z-axis guides 811 extending in the Z direction and a Z-axis slider 812 that moves along the pair of Z-axis guides 811. An injection device 500 is fixed to the Z-axis slider 812, and the injection device 500 moves up and down along with the Z-axis guide 811 together with the Z-axis slider 812.

  The Z-axis support portion 810 includes a spine frame 813 including a pair of column portions to which the pair of Z-axis guides 811 are fixed and a beam portion connecting the column portions, and a lower end portion of the column portion of the spine frame 813. And a Z-axis guide base 814 to be supported. The Z-axis guide base 814 is disposed horizontally.

  The injection apparatus 500 moves up and down along the Z-axis guide 811 to move between an injection molding position where the nozzle 520 touches the mold apparatus 10 and a standby position where the nozzle 520 moves upward from the injection molding position. To do. The injection apparatus 500 fills the molding apparatus 10 with a molding material at the injection molding position.

  On the other hand, the X-axis support portion 820 includes a pair of X-axis guides 821 extending in the X direction and an X-axis slider 822 that moves along the pair of X-axis guides 821. A Z-axis guide base 814 is fixed to the X-axis slider 822, and the Z-axis guide base 814 moves along the X-axis slider 822 together with the X-axis slider 822. The Z-axis guide base 814 and the X-axis slider 822 may be integrally formed.

  Further, the X-axis support portion 820 has an X-axis guide base 823 to which a pair of X-axis guides 821 are fixed. The X-axis guide base 823 is disposed horizontally, and is fixed to the upper surface of the fixed platen 110, for example.

  The injection device 500 can move in the X direction together with the X-axis slider 822, and can align the nozzle 520 and the molding material injection port of the mold device 10. It is possible to cope with a positional shift of the molding material injection port due to a temperature change of the mold apparatus 10 or the like. Moreover, it can respond to the multiple types of mold apparatus 10 from which thickness differs.

  The X-direction movement of the injection apparatus 500 is performed in a state where the nozzle 520 and the mold apparatus 10 are separated from each other so that the nozzle 520 and the mold apparatus 10 do not interfere with each other. For example, the injection device 500 moves from the injection molding position (see FIG. 3) to the standby position (see FIG. 4) and then moves in the X direction.

  According to the Z-axis support portion 810 and the X-axis support portion 820, the injection device 500 can be moved above the mold clamping device 100.

  By the way, if the machine enters the inside of the mold clamping device 100 or reaches the upper side of the mold clamping device 100 from the outside of the mold clamping device 100 (for example, outside a cover such as a safety door), the injection device 500 is maintained. Since access to the device 500 is poor, work efficiency is poor.

  Therefore, the support mechanism 800 according to the present embodiment includes a turning shaft 830 in order to improve the efficiency of the maintenance work of the injection device 500. The axial direction of the turning shaft 830 is, for example, the Z direction. The injection device 500 revolves with respect to the mold clamping device 100 about the revolving shaft 830.

  FIG. 5 is a view of the state when the injection apparatus according to the embodiment is in the injection molding position and the standby position, as viewed from above. FIG. 6 is a view of the state when the injection device according to the embodiment is in the retracted position as viewed from above. 5 and 6, the outer edge of the mold clamping device 100 is indicated by a broken line.

  The injection device 500 revolves with respect to the mold clamping device 100 about the revolving shaft 830. For example, the injection device 500 rises from the injection molding position to the standby position, and then turns from the standby position to the retracted position. Further, the injection device 500 turns from the retracted position to the standby position, and then descends from the standby position to the injection molding position.

  In the present embodiment, when the injection device 500 is in the retracted position, the nozzle 520 does not overlap the mold clamping device 100 when viewed in the vertical direction. That is, when the injection device 500 is in the retracted position, the nozzle 520 is outside the outer edge of the mold clamping device 100 as viewed in the vertical direction. Therefore, when the injection device 500 is in the retracted position, an extension region (a region on the inner side of the outer peripheral edge of the cylinder 510 in FIG. 6) in which the cylinder 510 is extended toward the nozzle 520 along the axial direction of the cylinder 510 is clamped. It does not overlap with the upper space of the device 100 and the mold clamping device 100. Therefore, the operator can perform the replacement work or the repair work of the screw 530 while standing at a position outside the outer edge of the mold clamping device 100 in the vertical direction. Therefore, the screw 530 can be easily accessed, and the efficiency of maintenance work can be improved.

  The screw 530 is pulled out from the cylinder 510 to the nozzle 520 side, and is inserted into the cylinder 510 from the nozzle 520 side. According to the present embodiment, as described above, the extension region in which the cylinder 510 is extended toward the nozzle 520 along the axial direction of the cylinder 510 does not overlap the mold clamping device 100 and the space above the mold clamping device 100. Therefore, it is easy to secure a replacement space for the screw 530, and the replacement work of the screw 530 is easy.

  The support mechanism 800 may support the mold clamping device 100 movably so that the cylinder 510 does not overlap the mold clamping device 100 when viewed in the vertical direction when the injection device 500 is in the retracted position. . When the injection device 500 is in the retracted position, the cylinder 510 is located outside the outer edge of the mold clamping device 100 as viewed in the vertical direction. Therefore, the operator can perform the removal work and attachment work of the cylinder 510 while standing in a position outside the outer edge of the mold clamping device 100 in the vertical direction.

  The cylinder 510 is attached to a driving device including a metering motor 540, an injection motor 550, and the like with a bolt at the upper end. The operator can easily access the upper end portion of the cylinder 510 because the worker performs the removing operation and the attaching operation of the cylinder 510 while standing in a position outside the outer edge of the mold clamping device 100 in the vertical direction. Therefore, the efficiency of maintenance work of the cylinder 510 can be improved.

  For example, the turning shaft 830 connects the Z-axis guide base 814 of the Z-axis support portion 810 to the X-axis slider 822 of the X-axis support portion 820 so as to be turnable. In this case, the injection device 500 and the Z-axis support portion 810 rotate with respect to the X-axis support portion 820 and the mold clamping device 100 about the rotation shaft 830.

  As shown in FIG. 6, the pivot shaft 830 may be provided at a position that does not overlap with the mold clamping device 100 when viewed in the vertical direction, that is, at a position outside the outer edge of the mold clamping device 100 when viewed in the vertical direction. The entire injection device 500 can be moved outside the outer edge of the mold clamping device 100, and various maintenance operations can be performed efficiently.

(Supporting mechanism of the first modification)
FIG. 7 is a diagram illustrating a nozzle touch release state of the injection device provided above the mold clamping device according to the first modification. FIG. 8 is a view of the state when the injection device according to the first modification is in the injection molding position and the standby position as viewed from above. FIG. 9 is a view of the state when the injection device according to the first modification is in the retracted position as viewed from above. 8 and 9, the outer edge of the mold clamping device 100 is indicated by a broken line.

  Similar to the support mechanism 800 of the above-described embodiment, the support mechanism 800A of the present modification includes a Z-axis support portion 810 that supports the mold clamping device 100 so as to be movable in the Z direction, and the mold clamping device 100. On the other hand, it has an X-axis support portion 820 that supports the injection device 500 so as to be movable in the X direction.

  According to the Z-axis support portion 810 and the X-axis support portion 820, the injection device 500 can be moved above the mold clamping device 100.

  By the way, if the machine enters the inside of the mold clamping device 100 or reaches the upper side of the mold clamping device 100 from the outside of the mold clamping device 100 (for example, outside a cover such as a safety door), the injection device 500 is maintained. Since access to the device 500 is poor, work efficiency is poor.

  Therefore, the support mechanism 800A of the present embodiment has a turning shaft 830A in order to improve the efficiency of the maintenance work of the injection device 500. The axial direction of the turning shaft 830A is, for example, the Z direction.

  The injection device 500 turns with respect to the mold clamping device 100 about the turning shaft 830A. For example, the injection device 500 rises from the injection molding position to the standby position, and then turns from the standby position to the retracted position. Further, the injection device 500 turns from the retracted position to the standby position, and then descends from the standby position to the injection molding position.

  In this modification, when the injection device 500 is in the retracted position, the nozzle 520 does not overlap the mold clamping device 100 when viewed in the vertical direction. That is, when the injection device 500 is in the retracted position, the nozzle 520 is outside the outer edge of the mold clamping device 100 as viewed in the vertical direction. Therefore, when the injection device 500 is in the retracted position, the extension region (the region on the inner side of the outer peripheral edge of the cylinder 510 in FIG. 9) in which the cylinder 510 is extended toward the nozzle 520 along the axial direction of the cylinder 510 is clamped. It does not overlap with the upper space of the device 100 and the mold clamping device 100. Therefore, the operator can perform the replacement work or the repair work of the screw 530 while standing at a position outside the outer edge of the mold clamping device 100 in the vertical direction. Therefore, the screw 530 can be easily accessed, and the efficiency of maintenance work can be improved.

  The screw 530 is pulled out from the cylinder 510 to the nozzle 520 side, and is inserted into the cylinder 510 from the nozzle 520 side. According to this modification, as described above, the extension region in which the cylinder 510 is extended toward the nozzle 520 along the axial direction of the cylinder 510 does not overlap the mold clamping device 100 and the space above the mold clamping device 100. Therefore, it is easy to secure a replacement space for the screw 530, and the replacement work of the screw 530 is easy.

  The support mechanism 800A may support the mold clamping device 100 so as to be movable so that the cylinder 510 does not overlap the mold clamp device 100 when viewed in the vertical direction when the injection device 500 is in the retracted position. . When the injection device 500 is in the retracted position, the cylinder 510 is located outside the outer edge of the mold clamping device 100 as viewed in the vertical direction. Therefore, the operator can perform the removal work and attachment work of the cylinder 510 while standing in a position outside the outer edge of the mold clamping device 100 in the vertical direction.

  The cylinder 510 is attached to a driving device including a metering motor 540, an injection motor 550, and the like with a bolt at the upper end. The operator can easily access the upper end portion of the cylinder 510 because the worker performs the removing operation and the attaching operation of the cylinder 510 while standing in a position outside the outer edge of the mold clamping device 100 in the vertical direction. Therefore, the efficiency of maintenance work of the cylinder 510 can be improved.

  The pivot shaft 830A, for example, couples the X-axis guide base 823 of the X-axis support portion 820 to the pivot plate 832A fixed to the fixed platen 110 so as to be pivotable. In this case, the injection device 500, the Z-axis support portion 810, and the X-axis support portion 820 rotate with respect to the mold clamping device 100 about the rotation shaft 830A.

  According to this modification, not only the Z-axis support portion 810 but also the X-axis support portion 820 revolves with respect to the mold clamping device 100 about the revolving shaft 830A. As a result, the X-axis guide 821 can be inclined with respect to the X direction, and the injection apparatus 500 can be moved along the inclined X-axis guide 821. The injection device 500 can be moved to a position where maintenance work is easier.

  As shown in FIG. 9, the turning shaft 830A may be provided at a position that does not overlap with the mold clamping device 100 when viewed in the vertical direction, that is, at a position outside the outer edge of the mold clamping device 100 when viewed in the vertical direction. The entire injection device 500 can be moved outside the outer edge of the mold clamping device 100, and various maintenance operations can be performed efficiently.

  In this modification, the turning plate 832A is provided between the fixed platen 110 and the X-axis guide base 823. However, the turning plate 832A may not be provided, and the X-axis guide base 823 is fixed via the turning shaft 830A. It may be connected to the upper surface of. It is only necessary that the X-axis guide base 823 can be swung with respect to the fixed platen 110 around the swivel axis 830A.

(Support Mechanism of Second Modification)
FIG. 10 is a diagram illustrating a nozzle touch release state of the injection device provided above the mold clamping device according to the second modification. FIG. 11 is a view of the state when the injection device according to the second modification is in the injection molding position and the standby position, as viewed from above. FIG. 12 is a view of the state when the injection device according to the second modification is in the retracted position as viewed from above. 11 and 12, the outer edge of the mold clamping device 100 is indicated by a broken line.

  Similar to the support mechanism 800 of the above-described embodiment, the support mechanism 800B of the present modification includes a Z-axis support portion 810 that supports the injection device 500 so as to be movable in the Z direction with respect to the mold clamping device 100, and the mold clamping device 100. On the other hand, it has an X-axis support portion 820 that supports the injection device 500 so as to be movable in the X direction.

  According to the Z-axis support portion 810 and the X-axis support portion 820, the injection device 500 can be moved above the mold clamping device 100.

  By the way, if the machine enters the inside of the mold clamping device 100 or reaches the upper side of the mold clamping device 100 from the outside of the mold clamping device 100 (for example, outside a cover such as a safety door), the injection device 500 is maintained. Since access to the device 500 is poor, work efficiency is poor.

  Accordingly, the support mechanism 800B of the present embodiment further includes a Y-axis support portion 830B that supports the mold clamping device 100 so that the injection device 500 can move in the Y direction in order to improve the efficiency of maintenance work of the injection device 500. .

  The Y-axis support portion 830B includes a pair of Y-axis guides 831B extending in the Y direction and a Y-axis slider 832B that moves along the pair of Y-axis guides 831B. An X-axis guide base 823 is fixed to the Y-axis slider 832B, and the X-axis guide base 823 moves along with the Y-axis guide 831B together with the Y-axis slider 832B. Note that the X-axis guide base 823 and the Y-axis slider 832B may be integrally formed.

  Further, the Y-axis support portion 830B has a Y-axis guide base 833B to which a pair of Y-axis guides 831B are fixed. The Y-axis guide base 833B is disposed horizontally, and is fixed to the upper surface of the fixed platen 110, for example.

  For example, the injection device 500 moves from the injection molding position to the standby position and then slides from the standby position to the retracted position by moving in the Y direction together with the Y-axis slider 832B. Further, the injection device 500 moves in the Y direction together with the Y-axis slider 832B, so that it slides from the retracted position to the standby position, and then descends from the standby position to the injection molding position.

  In this modification, when the injection device 500 is in the retracted position, the nozzle 520 does not overlap the mold clamping device 100 when viewed in the vertical direction. That is, when the injection device 500 is in the retracted position, the nozzle 520 is outside the outer edge of the mold clamping device 100 as viewed in the vertical direction. Therefore, when the injection device 500 is in the retracted position, the extension region (the region inside the outer peripheral edge of the cylinder 510 in FIG. 12) in which the cylinder 510 is extended toward the nozzle 520 along the axial direction of the cylinder 510 is clamped. It does not overlap with the upper space of the device 100 and the mold clamping device 100. Therefore, the operator can perform the replacement work or the repair work of the screw 530 while standing at a position outside the outer edge of the mold clamping device 100 in the vertical direction. Therefore, the screw 530 can be easily accessed, and the efficiency of maintenance work can be improved.

  The screw 530 is pulled out from the cylinder 510 to the nozzle 520 side, and is inserted into the cylinder 510 from the nozzle 520 side. According to this modification, as described above, the extension region in which the cylinder 510 is extended toward the nozzle 520 along the axial direction of the cylinder 510 does not overlap the mold clamping device 100 and the space above the mold clamping device 100. Therefore, it is easy to secure a replacement space for the screw 530, and the replacement work of the screw 530 is easy.

  The support mechanism 800B may support the injection device 500 movably with respect to the mold clamping device 100 so that the cylinder 510 does not overlap the mold clamping device 100 when viewed in the vertical direction when the injection device 500 is in the retracted position. . When the injection device 500 is in the retracted position, the cylinder 510 is located outside the outer edge of the mold clamping device 100 as viewed in the vertical direction. Therefore, the operator can perform the removal work and attachment work of the cylinder 510 while standing in a position outside the outer edge of the mold clamping device 100 in the vertical direction.

  The cylinder 510 is attached to a driving device including a metering motor 540, an injection motor 550, and the like with a bolt at the upper end. The operator can easily access the upper end portion of the cylinder 510 because the worker performs the removing operation and the attaching operation of the cylinder 510 while standing in a position outside the outer edge of the mold clamping device 100 in the vertical direction. Therefore, the efficiency of maintenance work of the cylinder 510 can be improved.

  The Y-direction dimension of the Y-axis guide 831B may be twice or more the Y-direction dimension of the injection device 500. The entire injection device 500 can be moved outside the outer edge of the mold clamping device 100, and various maintenance operations can be performed efficiently.

  In this modification, the Y-axis support portion 830B is provided between the fixed platen 110 and the X-axis support portion 820. However, even if the X-axis support portion 820 is provided between the fixed platen 110 and the Y-axis support portion 830B. Good. In this case, the X-axis guide base 823 is fixed to the upper surface of the fixed platen 110, the Y-axis guide base 833B is fixed to the X-axis slider 822, and the Z-axis guide base 814 is fixed to the Y-axis slider 832B. In this case, the X-axis slider 822 and the Y-axis guide base 833B may be integrally formed. In this case, the Y-axis slider 832B and the Z-axis guide base 814 may be integrally formed.

  In addition, you may use combining the Y-axis support part 830B of this modification, and the turning shaft 830 of the said embodiment, or the turning shaft 830A of the said 1st modification. The pivot axis may be provided between any two of the fixed platen 110, the X-axis support part 820, and the Y-axis support part 830B.

  In this modification, the Y-axis guide 831B extending in the Y direction orthogonal to the X direction is used, but a guide extending in the horizontal direction obliquely intersecting the X direction may be used. It is only necessary that the injection device 500 can be slid to the retracted position by sliding the injection device 500 along a guide extending in the horizontal direction intersecting the X direction.

(Supporting mechanism of the third modification)
FIG. 13 is a diagram illustrating a nozzle touch release state of the injection device provided above the mold clamping device according to the third modification. FIG. 14 is a view of the state when the injection device according to the third modification is in the injection molding position and the standby position as viewed from above. FIG. 15 is a view of the state when the injection device according to the third modification is in the retracted position as viewed from above. 14 and 15, the outer edge of the mold clamping device 100 is indicated by a broken line.

  Similar to the support mechanism 800 of the above-described embodiment, the support mechanism 800C of the present modification includes a Z-axis support portion 810 that supports the injection device 500 so as to be movable in the Z direction with respect to the mold clamping device 100, and the mold clamping device 100. On the other hand, it has an X-axis support portion 820 that supports the injection device 500 so as to be movable in the X direction.

  According to the Z-axis support portion 810 and the X-axis support portion 820, the injection device 500 can be moved above the mold clamping device 100.

  By the way, if the machine enters the inside of the mold clamping device 100 or reaches the upper side of the mold clamping device 100 from the outside of the mold clamping device 100 (for example, outside a cover such as a safety door), the injection device 500 is maintained. Since access to the device 500 is poor, work efficiency is poor.

  Therefore, the support mechanism 800 </ b> C of the present embodiment has a turning shaft 830 </ b> C in order to improve the efficiency of maintenance work of the injection device 500. The axial direction of the turning shaft 830C is, for example, the X direction. For example, the turning shaft 830 </ b> C connects the injection device 500 to the Z-axis slider 812 of the Z-axis support portion 810 so as to be capable of turning.

  The injection device 500 turns with respect to the mold clamping device 100 about the turning shaft 830C. For example, the injection device 500 rises from the injection molding position to the standby position, and then turns from the standby position to the retracted position. Further, the injection device 500 turns from the retracted position to the standby position, and then descends from the standby position to the injection molding position.

  In this modification, when the injection device 500 is in the retracted position, the nozzle 520 does not overlap the mold clamping device 100 when viewed in the vertical direction. That is, when the injection device 500 is in the retracted position, the nozzle 520 is outside the outer edge of the mold clamping device 100 as viewed in the vertical direction. Therefore, when the injection device 500 is in the retracted position, an extension region (region A indicated by hatching in FIG. 15) obtained by extending the cylinder 510 toward the nozzle 520 along the axial direction of the cylinder 510 is the mold clamping device 100 and the mold clamping. It does not overlap with the upper space of the device 100. Therefore, the operator can perform the replacement work or the repair work of the screw 530 while standing at a position outside the outer edge of the mold clamping device 100 in the vertical direction. Therefore, the screw 530 can be easily accessed, and the efficiency of maintenance work can be improved.

  The screw 530 is pulled out from the cylinder 510 to the nozzle 520 side, and is inserted into the cylinder 510 from the nozzle 520 side. According to this modification, as described above, the extension region in which the cylinder 510 is extended toward the nozzle 520 along the axial direction of the cylinder 510 does not overlap the mold clamping device 100 and the space above the mold clamping device 100. Therefore, it is easy to secure a replacement space for the screw 530, and the replacement work of the screw 530 is easy.

  Note that the turning shaft 830C of the present modification may be used together with at least one of the turning shaft 830 of the above embodiment, the turning shaft 830A of the first modification, and the Y-axis support portion 830B of the second modification. .

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

  For example, the mold clamping device 100 is a horizontal type, but may be a saddle type. In this case, the support mechanisms 800, 800 </ b> A, 800 </ b> B, and 800 </ b> C may support the injection device 500 so as to be movable with respect to the upper platen of the mold clamping device 100.

100 Clamping device 110 Fixed platen 500 Injection device 510 Cylinder 520 Nozzle 530 Screw 600 Moving device 800 Support mechanism 810 Z-axis support portion 820 X-axis support portion 830 Rotating shaft 830A Rotating shaft 830B Y-axis supporting portion 831B Y-axis guide 830C Rotating shaft

Claims (7)

A mold clamping device for closing, clamping and opening the mold device;
An injection device for filling the molding device with a molding material from above;
A support mechanism for movably supporting the injection device with respect to the mold clamping device,
The injection device includes a cylinder in which the molding material is melted, and a nozzle that fills the mold device with the molding material melted in the cylinder.
The support mechanism moves the injection device between an injection molding position where the injection device fills the mold material with the molding material and a retreat position where the nozzle does not overlap the mold clamping device when viewed in a vertical direction. An injection molding machine that supports it as possible.   The support mechanism movably supports the injection device relative to the mold clamping device so that the cylinder does not overlap the mold clamping device when viewed in a vertical direction when the injection device is in the retracted position; The injection molding machine according to claim 1. The support mechanism includes a pivot axis;
The injection molding machine according to claim 1 or 2, wherein the injection device revolves with respect to the mold clamping device about the revolving shaft.   The support mechanism includes a first support portion that supports the injection device such that the injection device is movable in the vertical direction with respect to the mold clamping device, and a second support that supports the injection device so that the injection device is movable in the horizontal direction. The injection molding machine according to claim 3, having a portion.   5. The injection molding machine according to claim 4, wherein the injection device and the first support portion pivot with respect to the second support portion and the mold clamping device about the pivot axis.   The injection molding machine according to claim 5, wherein the injection device, the first support portion, and the second support portion rotate with respect to the mold clamping device about the rotation axis. The support mechanism includes a guide extending in the horizontal direction intersecting the mold opening / closing direction,
The injection molding machine according to any one of claims 1 to 5, wherein the injection device slides with respect to the mold clamping device along the guide.

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