JP6791795B2 - Injection molding machine - Google Patents

Description

The present invention relates to an injection molding machine.

The injection molding machine described in Patent Document 1 includes a machine base for an injection device provided with a swivel pin and a swivel support member for swivelly supporting the machine base for the injection device at least between the horizontal direction and the vertical direction. Be prepared. The machine base for the injection device holds the injection device. When the mold is filled with resin from the injection device, the machine base for the injection device is 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 machine base for the injection device in the horizontal state.

Japanese Unexamined Patent Publication No. 2016-159595

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 allows resin to be filled from the upper surface of the mold.

However, when the injection device is installed in the injection molding machine, the cylinders and nozzles of the injection device are arranged above the mold clamping device.

Therefore, when performing maintenance work on the injection device with the injection device installed in the injection molding machine, the worker either sneaks inside the mold clamping device or works outside the mold clamping device (for example, a safety door). You end up reaching out above the mold clamping device (outside the cover) to work. Therefore, access to the injection device was poor and work efficiency was poor.

The present invention has been made in view of the above problems, and mainly provides an injection molding machine capable of improving the efficiency of maintenance work of a vertical injection device for filling a molding material from above to the inside of the mold device. Purpose.

In order to solve the above problems, according to one aspect of the present invention,
A mold clamping device that closes, molds, and opens the mold device,
An injection device that fills the molding material from above with respect to the mold device,
A support mechanism for movably supporting the injection device with respect to the mold clamping device is provided.
The injection device has a cylinder in which the molding material is melted, and a nozzle for filling the mold device with the molding material melted in the cylinder.
The support mechanism moves the injection device to an injection molding position where the injection device fills the mold device with the molding material and a retracted position where the nozzle does not overlap the mold clamping device in a vertical direction. Support as much as possible
The support mechanism includes a first support portion that movably supports the injection device in the vertical direction with respect to the mold clamping device, and a second support that movably supports the injection device in the horizontal direction with respect to the mold clamping device. It has a part and a swivel shaft,
An injection molding machine is provided in which the injection device, the first support portion, and the second support portion are swiveled with respect to the mold clamping device about the swivel shaft .

According to one aspect of the present invention, there is provided an injection molding machine capable of improving the efficiency of maintenance work of a vertical injection device for filling a molding material from above to the inside of the mold device.

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 nozzle touch state of the injection device provided above the mold clamping device by one Embodiment. It is a figure which shows the nozzle touch release state of the injection device of FIG. It is a figure which looked at the state when the injection apparatus by one Embodiment is in an injection molding position and a standby position from above. It is the figure which looked at the state when the injection device by one Embodiment is in the retracted position from above. It is a figure which shows the nozzle touch release state of the injection device provided above the mold clamping device by 1st modification. It is the figure which looked at the state when the injection apparatus by the 1st modification is in an injection molding position and a standby position from above. It is the figure which looked at the state when the injection device by 1st modification is in a retracted position from above. It is a figure which shows the nozzle touch release state of the injection device provided above the mold clamping device by the 2nd modification. It is a figure which looked at the state when the injection apparatus by the 2nd modification is in an injection molding position and a standby position from above. It is the figure which looked at the state when the injection device by the 2nd modification is in the retracted position from above. It is a figure which shows the nozzle touch release state of the injection device provided above the mold clamping device by the 3rd modification. It is a figure which looked at the state when the injection apparatus by the 3rd modification is in an injection molding position and a standby position from above. It is the figure which looked at the state when the injection device by the 3rd modification is in a retracted position from above.

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 are designated by the same or corresponding reference numerals and the description thereof will be omitted. In the present specification, one of the "X-axis", "Y-axis" and "Z-axis" (for example, "Z-axis") is read as "first", and the other one (for example, "X-axis") is read as "first". ") 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 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, for convenience of explanation, the injection device 500, the moving device 600, and the support mechanism 800 shown in FIG. 3 and the like are not shown. As shown in FIGS. 1 and 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 (see FIG. 3). It has a control device 700 and a support mechanism 800 (see FIG. 3). 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 (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 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. At the time of mold clamping, a cavity space 14 is formed between the movable mold 12 and the fixed mold 11, 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. 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.

(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 (left direction in FIGS. 1 and 2) is set to the front, and the screw 330 during weighing is set forward. 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 is adjustable with respect to the mold device 10. The injection device 300 touches the mold device 10 to fill the cavity space 14 in the mold device 10 with a molding material. The 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 detected 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 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 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 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 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 injection device 300 may be vertical or horizontal. Similarly, the mold clamping device combined with the horizontal injection device 300 may be horizontal or vertical.

(Mobile 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 at the time of filling (left direction in FIGS. 1 and 2) is set to the front, and the moving direction of the screw 330 at the time of weighing (FIGS. 1 and 2). The right direction in FIG. 2) will be described as the rear.

The moving device 400 advances and retreats the injection device 300 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 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 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 anterior chamber 435 via the first flow path 401, so that 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 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 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 a hydraulic cylinder 430, but the present invention is not limited thereto. 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)
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 referred to as 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.

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

(Injection device)
The injection device 500 is moved up and down with respect to the fixed platen 110. The injection device 500 touches the mold device 10 and fills the mold device 10 with the molding material from above. The 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 injection device 500 is a vertical type in which the axial direction of the cylinder 510 is in the vertical direction. The injection device 500 has a cylinder 510 in which the molding material is melted, and a nozzle 520 that fills the mold device 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 horizontal. 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 internally from the supply port 511. The supply port 511 is formed on 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 detection temperature of the temperature detector 514 reaches the set temperature.

The nozzle 520 is provided at the lower end of the cylinder 510 and touches the mold device 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 detection temperature of the nozzle 520 reaches the set temperature.

The screw 530 is rotatably and vertically arranged in the cylinder 510. When the screw 530 is rotated, the molding material is fed downward along the spiral groove of the screw 530. The molding material is gradually melted by the heat from the cylinder 510 while being fed downward. The screw 530 is raised as the liquid molding material is fed below the screw 530 and accumulated in the lower part of the cylinder 510. After that, when the screw 530 is lowered, the liquid molding material accumulated under the screw 530 is ejected from the nozzle 520 and filled in the mold apparatus 10.

A backflow prevention ring 531 is vertically attached to the lower part of the screw 530 as a backflow prevention valve for preventing the backflow of the molding material from the lower side to the upper side of the screw 530 when the screw 530 is pushed downward.

When the backflow prevention ring 531 is lowered, the backflow prevention ring 531 is pushed upward by the pressure of the molding material below the screw 530, and is relative to the screw 530 up to the closing position (see FIG. 3) that blocks the flow path of the molding material. Rise. This prevents the molding material accumulated below 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 the opening position opens the flow path of the molding material. It descends relative to the screw 530 to (see FIG. 4). As a result, the molding material is sent below 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 injection device 500 may have a drive source for moving the backflow prevention ring 531 up and down 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 raises and lowers 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 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 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 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 lower the screw 530 at a set speed, and the liquid molding material accumulated under 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, instead of stopping the screw 530, the screw 530 may be slowed down or raised at a slow speed.

In the pressure holding step, the injection motor 550 is driven to push the screw 530 downward, and the pressure of the molding material (hereinafter, also referred to as “holding pressure”) at the lower 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 downward along the spiral groove of the screw 530. Along with this, the molding material is gradually melted. The screw 530 is raised as the liquid molding material is fed below the screw 530 and accumulated in the lower part 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 rise 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 rises to the weighing completion position and a predetermined amount of molding material is accumulated below the screw 530, the weighing process is completed.

The 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 raised and lowered, and a plunger is rotatably arranged in the injection cylinder.

(Mobile device)
The moving device 600 raises and lowers the injection device 500 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 screwed onto the screw shaft 621. A ball or 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 the Z-axis slider 812 described below, the screw shaft 621 is rotatably supported by the Z-axis slider 812, and the screw nut 622 is fixed to the spine frame 813 described below. 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 with respect to the fixed platen 110.

The injection device moving motor 610 of the present 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 by 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 movably supports the injection device 500 with respect to the mold clamping device 100. The movement of the injection device 500 with respect to the mold clamping device 100 may be automatic or manual.

The support mechanism 800 supports, for example, the Z-axis support portion 810 that movably supports the injection device 500 in the Z direction with respect to the mold clamping device 100, and the injection device 500 movably supported by the mold clamping device 100 in the X direction. It has an X-axis support portion 820.

The Z-axis support portion 810 has, 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 the Z-axis guide 811 together with the Z-axis slider 812.

Further, the Z-axis support portion 810 includes a spine frame 813 including a pair of pillars to which the pair of Z-axis guides 811 are fixed, a beam portion connecting the pillars, and the like, and a lower end of the pillar of the spine frame 813. It has a Z-axis guide base 814 to support. The Z-axis guide base 814 is arranged horizontally.

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

On the other hand, the X-axis support portion 820 has 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 arranged horizontally and is fixed to, for example, the upper surface of the fixed platen 110.

The injection device 500 can move in the X direction together with the X-axis slider 822, and can align the nozzle 520 with the molding material injection port of the mold device 10. It is possible to cope with the displacement of the molding material injection port due to the temperature change of the mold apparatus 10. In addition, it can be used for a plurality of types of mold devices 10 having different thicknesses.

The movement of the injection device 500 in the X direction is performed with the nozzle 520 and the mold device 10 separated from each other so that the nozzle 520 and the mold device 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, when the injection device 500 is maintained by sneaking into the mold clamping device 100 or reaching above the mold clamping device 100 from the outside of the mold clamping device 100 (for example, the outside of a cover such as a safety door), the injection device 500 is ejected. Since the access to the device 500 is poor, the work efficiency is poor.

Therefore, the support mechanism 800 of the present embodiment has a swivel shaft 830 in order to improve the efficiency of maintenance work of the injection device 500. The axial direction of the swivel shaft 830 is, for example, the Z direction. The injection device 500 swivels around the swivel shaft 830 with respect to the mold clamping device 100.

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

The injection device 500 swivels around the swivel shaft 830 with respect to the mold clamping device 100. 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 with the mold clamping device 100 in the vertical view. 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 in the vertical view. Therefore, when the injection device 500 is in the retracted position, the extension region in which the cylinder 510 is extended toward the nozzle 520 along the axial direction of the cylinder 510 (the region inside the outer peripheral edge of the cylinder 510 in FIG. 6) is molded. It does not overlap with the space above the device 100 and the mold clamping device 100. Therefore, the operator can perform the replacement work and the repair work of the screw 530 by 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 inside of the cylinder 510 toward the nozzle 520 side, and is inserted into the inside of 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 with the space above the mold clamping device 100 and the mold clamping device 100. Therefore, it is easy to secure a replacement space for the screw 530, and it is easy to replace the screw 530.

The support mechanism 800 may movably support the injection device 500 with respect to the mold clamping device 100 so that the cylinder 510 does not overlap the mold clamping device 100 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 outside the outer edge of the mold clamping device 100 in vertical view. Therefore, the operator can perform the removal work and the installation work of the cylinder 510 by standing at a position outside the outer edge of the mold clamping device 100 in the vertical direction.

At the upper end, the cylinder 510 is attached to a drive device including a metering motor 540, an injection motor 550, and the like with bolts and the like. Since the operator stands outside the outer edge of the mold clamping device 100 in the vertical direction to perform the removing work and the mounting work of the cylinder 510, the upper end portion of the cylinder 510 can be easily accessed. Therefore, the efficiency of the maintenance work of the cylinder 510 can be improved.

The swivel 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 swivelable. In this case, the injection device 500 and the Z-axis support portion 810 swivel around the swivel shaft 830 with respect to the X-axis support portion 820 and the mold clamping device 100.

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

(Support mechanism of the first modification)
FIG. 7 is a diagram showing 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 from above of the state when the injection device according to the first modification is in the injection molding position and the standby position. FIG. 9 is a view from above of the state when the injection device according to the first modification is in the retracted position. In FIGS. 8 and 9, the outer edge of the mold clamping device 100 is shown by a broken line.

Similar to the support mechanism 800 of the above embodiment, the support mechanism 800A of the present modification includes the Z-axis support portion 810 that movably supports the injection device 500 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 movably supports the injection device 500 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, when the injection device 500 is maintained by sneaking into the mold clamping device 100 or reaching above the mold clamping device 100 from the outside of the mold clamping device 100 (for example, the outside of a cover such as a safety door), the injection device 500 is ejected. Since the access to the device 500 is poor, the work efficiency is poor.

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

The injection device 500 swivels with respect to the mold clamping device 100 about the swivel 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 with the mold clamping device 100 in the vertical view. 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 in the vertical view. Therefore, when the injection device 500 is in the retracted position, the extension region in which the cylinder 510 is extended toward the nozzle 520 along the axial direction of the cylinder 510 (the region inside the outer peripheral edge of the cylinder 510 in FIG. 9) is molded. It does not overlap with the space above the device 100 and the mold clamping device 100. Therefore, the operator can perform the replacement work and the repair work of the screw 530 by 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 inside of the cylinder 510 toward the nozzle 520 side, and is inserted into the inside of 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 with the space above the mold clamping device 100 and the mold clamping device 100. Therefore, it is easy to secure a replacement space for the screw 530, and it is easy to replace the screw 530.

The support mechanism 800A may movably support the injection device 500 with respect to the mold clamping device 100 so that the cylinder 510 does not overlap the mold clamping device 100 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 outside the outer edge of the mold clamping device 100 in vertical view. Therefore, the operator can perform the removal work and the installation work of the cylinder 510 by standing at a position outside the outer edge of the mold clamping device 100 in the vertical direction.

At the upper end, the cylinder 510 is attached to a drive device including a metering motor 540, an injection motor 550, and the like with bolts and the like. Since the operator stands outside the outer edge of the mold clamping device 100 in the vertical direction to perform the removing work and the mounting work of the cylinder 510, the upper end portion of the cylinder 510 can be easily accessed. Therefore, the efficiency of the maintenance work of the cylinder 510 can be improved.

The swivel shaft 830A rotatably connects the X-axis guide base 823 of the X-axis support portion 820 to the swivel plate 832A fixed to the fixed platen 110, for example. In this case, the injection device 500, the Z-axis support portion 810, and the X-axis support portion 820 swivel with respect to the mold clamping device 100 about the swivel shaft 830A.

According to this modification, not only the Z-axis support portion 810 but also the X-axis support portion 820 swivels with respect to the mold clamping device 100 around the swivel shaft 830A. As a result, the X-axis guide 821 can be tilted in the X direction, and the injection device 500 can be moved along the tilted X-axis guide 821. The injection device 500 can be moved to a position that is easier for maintenance work.

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

In this modification, the swivel plate 832A is provided between the fixed platen 110 and the X-axis guide base 823, but the swivel plate 832A may not be provided, and the X-axis guide base 823 is fixed via the swivel shaft 830A. It may be connected to the upper surface of the. It suffices if the X-axis guide base 823 can be swiveled with respect to the fixed platen 110 about the swivel shaft 830A.

(Support mechanism of the second modification)
FIG. 10 is a diagram showing 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 from above of the state when the injection device according to the second modification is in the injection molding position and the standby position. FIG. 12 is a view from above of the state when the injection device according to the second modification is in the retracted position. In FIGS. 11 and 12, the outer edge of the mold clamping device 100 is shown by a broken line.

Similar to the support mechanism 800 of the above embodiment, the support mechanism 800B of the present modification includes a Z-axis support portion 810 that movably supports the injection device 500 with respect to the mold clamping device 100 and a mold clamping device 100. On the other hand, it has an X-axis support portion 820 that movably supports the injection device 500 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, when the injection device 500 is maintained by sneaking into the mold clamping device 100 or reaching above the mold clamping device 100 from the outside of the mold clamping device 100 (for example, the outside of a cover such as a safety door), the injection device 500 is ejected. Since the access to the device 500 is poor, the work efficiency is poor.

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

The Y-axis support portion 830B has 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 the Y-axis guide 831B together with the Y-axis slider 832B. 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 arranged horizontally and is fixed to, for example, the upper surface of the fixed platen 110.

For example, the injection device 500 rises 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 slides from the retracted position to the standby position by moving in the Y direction together with the Y-axis slider 832B, 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 with the mold clamping device 100 in the vertical view. 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 in the vertical view. Therefore, when the injection device 500 is in the retracted position, the extension region in which the cylinder 510 is extended toward the nozzle 520 along the axial direction of the cylinder 510 (the region inside the outer peripheral edge of the cylinder 510 in FIG. 12) is molded. It does not overlap with the space above the device 100 and the mold clamping device 100. Therefore, the operator can perform the replacement work and the repair work of the screw 530 by 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 inside of the cylinder 510 toward the nozzle 520 side, and is inserted into the inside of 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 with the space above the mold clamping device 100 and the mold clamping device 100. Therefore, it is easy to secure a replacement space for the screw 530, and it is easy to replace the screw 530.

The support mechanism 800B may movably support the injection device 500 with respect to the mold clamping device 100 so that the cylinder 510 does not overlap the mold clamping device 100 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 outside the outer edge of the mold clamping device 100 in vertical view. Therefore, the operator can perform the removal work and the installation work of the cylinder 510 by standing at a position outside the outer edge of the mold clamping device 100 in the vertical direction.

At the upper end, the cylinder 510 is attached to a drive device including a metering motor 540, an injection motor 550, and the like with bolts and the like. Since the operator stands outside the outer edge of the mold clamping device 100 in the vertical direction to perform the removing work and the mounting work of the cylinder 510, the upper end portion of the cylinder 510 can be easily accessed. Therefore, the efficiency of the maintenance work of the cylinder 510 can be improved.

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

In this modification, the Y-axis support portion 830B is provided between the fixed platen 110 and the X-axis support portion 820, but 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. Further, in this case, the Y-axis slider 832B and the Z-axis guide base 814 may be integrally formed.

The Y-axis support portion 830B of the present modification may be used in combination with the swivel shaft 830 of the above embodiment or the swivel shaft 830A of the first modification. The swivel shaft may be provided between any two of the fixed platen 110, the X-axis support portion 820, and the Y-axis support portion 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 diagonally intersecting the X direction may be used. It suffices if the injection device 500 can be slid to the retracted position by sliding the injection device 500 along the guide extending in the horizontal direction intersecting the X direction.

(Support mechanism of the third modification)
FIG. 13 is a diagram showing 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 from above of the state when the injection device according to the third modification is in the injection molding position and the standby position. FIG. 15 is a view from above of the state when the injection device according to the third modification is in the retracted position. In FIGS. 14 and 15, the outer edge of the mold clamping device 100 is shown by a broken line.

Similar to the support mechanism 800 of the above embodiment, the support mechanism 800C of this modification includes a Z-axis support portion 810 that movably supports the injection device 500 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 movably supports the injection device 500 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, when the injection device 500 is maintained by sneaking into the mold clamping device 100 or reaching above the mold clamping device 100 from the outside of the mold clamping device 100 (for example, the outside of a cover such as a safety door), the injection device 500 is ejected. Since the access to the device 500 is poor, the work efficiency is poor.

Therefore, the support mechanism 800C of the present embodiment has a swivel shaft 830C in order to improve the efficiency of maintenance work of the injection device 500. The axial direction of the swivel shaft 830C is, for example, the X direction. The swivel shaft 830C rotatably connects the injection device 500 to, for example, the Z-axis slider 812 of the Z-axis support portion 810.

The injection device 500 swivels with respect to the mold clamping device 100 about the swivel 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 with the mold clamping device 100 in the vertical view. 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 in the vertical view. Therefore, when the injection device 500 is in the retracted position, the extension region (region A shown by the diagonal line in FIG. 15) in which the cylinder 510 is extended 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 space above the device 100. Therefore, the operator can perform the replacement work and the repair work of the screw 530 by 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 inside of the cylinder 510 toward the nozzle 520 side, and is inserted into the inside of 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 with the space above the mold clamping device 100 and the mold clamping device 100. Therefore, it is easy to secure a replacement space for the screw 530, and it is easy to replace the screw 530.

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

(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.

For example, the mold clamping device 100 is a horizontal type, but may be a vertical type. In this case, the support mechanisms 800, 800A, 800B, 800C may movably support the injection device 500 with respect to the upper platen of the mold clamping device 100.

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

Claims (4)

A mold clamping device that closes, molds, and opens the mold device,
An injection device that fills the molding material from above with respect to the mold device,
A support mechanism for movably supporting the injection device with respect to the mold clamping device is provided.
The injection device has a cylinder in which the molding material is melted, and a nozzle for filling the mold device with the molding material melted in the cylinder.
The support mechanism moves the injection device to an injection molding position where the injection device fills the mold device with the molding material and a retracted position where the nozzle does not overlap the mold clamping device in a vertical direction. Support as much as possible
The support mechanism includes a first support portion that movably supports the injection device in the vertical direction with respect to the mold clamping device, and a second support that movably supports the injection device in the horizontal direction with respect to the mold clamping device. It has a part and a swivel shaft,
The injection device, the first support portion, and the second support portion rotate about the swivel shaft with respect to the mold clamping device.
Injection molding machine. The support mechanism movably supports the injection device with respect to the mold clamping device so that the cylinder does not overlap with the mold clamping device in a vertical view when the injection device is in the retracted position. The injection molding machine according to claim 1. The injection molding machine according to claim 1 or 2 , wherein the injection device and the first support portion rotate with respect to the second support portion and the mold clamping device around the swivel shaft. The second support includes a horizontally extending guide that intersects the mold opening and closing direction.
The injection molding machine according to any one of claims 1 to 3 , wherein the injection device slides with respect to the mold clamping device along the guide.

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