JP2006347015A - Injection molding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simply and easily remove the water leaked from a rotary joint in an injection molding machine constituted so as to circulate temperature regulating water to the respective molds mounted on a turntable through the rotary joint set at the center of the turntable. <P>SOLUTION: The water leaked from the contact surface (rotary slide surface) with the fixed side and rotary side of the rotary joint is guided to the annular groove for storing the leaked water formed on the upper surface of the flange of the lower part on the rotary side of the rotary joint to be stored in the annular groove and the water stored in the annular groove for storing the leaked water is led out of the injection molding machine by a water sucking means including the pipeline connection body, which is selectively connected to the connecting and receiving means provided to the outer peripheral part of the turntable, through the connecting and receiving means. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an injection molding machine having a plurality of molds mounted on a rotary table, and in particular, has a configuration in which water for temperature control is circulated through each mold through a rotary joint disposed at the center of the rotary table. The present invention relates to a technique for removing water leaking from a rotary joint in a taking machine (injection molding machine).

  A plurality of sets of fixed molds and movable molds (for example, four sets) are arranged on a rotary table held so as to be rotatable on the fixed plate, and the movable molds are arranged with respect to the fixed molds. A mold clamping force is applied by a mold clamping plate to a set of molds that are configured to move up and down by a predetermined amount and are placed at a rotation stop position (injection position) facing the injection unit. An injection molding machine in which molten resin is injected and filled into a mold in a state where force is applied is known from Japanese Patent Application Laid-Open No. 11-105060 (Patent Document 1).

  The injection molding machine configured as described above intermittently rotates the rotary table to sequentially inject and fill the mold placed at the injection position, and at the mold opening position, the movable mold is fixed to the fixed mold. Since the mold is opened and the mold is opened, and the molded product is sequentially taken out, the productivity at the time of insert molding is excellent.

By the way, if the structure which mounts the metal mold | die on a rotary table is taken, in order to circulate the water for temperature control in a metal mold | die, a rotary joint is provided in the center of a rotary table, and each mold is heated through this rotary joint. It is obliged to take the structure which circulates the water for adjustment. For example, as an injection molding machine having a configuration in which a plurality of fixed molds are mounted on a rotary table and water for temperature control is circulated through each fixed mold through a rotary joint, Japanese Patent Application Laid-Open No. 1-180314 (Patent Document 2). ).
JP 11-105060 A Japanese Patent Laid-Open No. 01-180314

  As seen in Patent Document 2 and the like, when the temperature control water is circulated through each mold through a rotary joint arranged at the center of the rotary table, even if the mold rotates with the rotation of the rotary table, Since the temperature adjustment water pipe connecting the rotary joint and the mold also rotates together, the temperature adjustment water can be circulated without any trouble.

  By the way, in order to circulate water for temperature control to each mold through the rotary joint, water is allowed to flow from the fixed side of the rotary joint to the rotating side, and also from the rotating side to the fixed side. Even if the waterproof seal between the fixed side and rotary side of the rotary joint is tightened, the seal deteriorates due to rotational wear, and water leaks from the contact surface (rotary sliding surface) between the fixed side and rotary side of the rotary joint. It is inevitable that this will occur. However, in the prior art, no consideration has been given to cope with water leakage from the rotary joint.

  The present invention has been made in view of the above points, and the object of the present invention is to circulate temperature-adjusting water to each mold mounted on the rotary table through a rotary joint arranged at the center of the rotary table. In an injection molding machine, the water leaking from the rotary joint can be easily and easily removed.

In order to achieve the above object, the present invention
A fixed plate arranged in a fixed manner, a rotary table held so as to be rotatable on the fixed plate, and a rotation center portion of the rotary table, the fixed side of which is fixed to the fixed plate, A rotary joint whose rotating side is fixed to the rotary table, water temperature adjusting / flowing water circulation means for supplying temperature adjusting water to the rotary joint and collecting temperature adjusting water from the rotary joint, and the like on the rotary table A plurality of molds arranged at an angle, and a temperature control water pipe connecting each mold and the rotary joint to circulate water for temperature control through the rotary joint in each mold. In injection molding machine,
In order to guide and store water leaked from the contact surface between the fixed side and the rotating side of the rotary joint, an annular groove for water leakage reservoir formed on the upper surface of the lower flange on the rotating side of the rotary joint;
A connection receiving means disposed on an outer peripheral portion of the rotary table and connected via the annular groove for leaking water storage and a drain pipe;
A water suction means including a pipe connection body arranged at a position near the rotary table in the fixed table and capable of moving forward and backward so as to be able to contact and separate from the connection receiving means;
The structure which has is taken.

  According to the present invention, even if water leaks from the rotary joint due to use over time, the water leaked from the contact surface (rotating sliding surface) between the fixed side and the rotary side of the rotary joint is not removed from the rotary side of the rotary joint. The water collected in the annular groove for the water leakage reservoir formed on the upper surface of the lower flange is stored in the annular groove for the water leakage reservoir through the drain pipe and the connection receiving means on the outer periphery of the rotary table. Since water can be led out of the machine by water sucking means including a pipe connecting body selectively connected to the means, water leaked from the rotary joint can be easily and easily removed. Further, even if it is difficult to disassemble and repair the rotary joint, the molding operation can be performed without any trouble for a long time without disassembling and repairing the rotary joint.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 6 relate to an injection molding machine according to an embodiment of the present invention (hereinafter referred to as the present embodiment), and the injection molding machine of the present embodiment has a rotary table on which four sets of molds are mounted. This is a vertical clamping / horizontal injection type machine.

  FIG. 1 is a partially broken front view of an injection molding machine according to the present embodiment. In FIG. 1, reference numeral 1 denotes a machine base frame, 2 denotes a built-in power supply system, control circuit system, etc., and a base board arranged on the machine base frame 1, 3 denotes a side injection type arranged on the base board 2. The injection unit (injection system mechanism) 4 is a vertical clamping type mold clamping (mold opening / closing) unit (mold clamping (mold opening / closing) mechanism) disposed on the machine base frame 1.

  FIG. 2 is an explanatory diagram viewed from the simplified front of the mold clamping unit 4. In FIG. 2, reference numeral 5 denotes a support frame that is erected and fixed on the machine base frame 1, and 6 is a substantially rectangular fixing as viewed from above, fixed to the support frame 5 and other support frames (not shown). The plate 7 is arranged so as to be rotatable on the fixed plate 6, and is a rotary table having a circular shape when viewed from above, and the fixed side (inner peripheral side) 8 is fixed to the fixed plate 6 and rotated. A rotary joint fixed to the rotary table 7 on the side (outer peripheral side), 9 is a table rotating motor (table rotating electric servomotor) attached to the fixed plate 6, and 10 is disposed on the fixed plate 6. This is a rotation transmission mechanism that transmits the rotation of the table rotation motor 9 to the rotation table 7 to rotate the rotation table 7.

  Reference numeral 11 denotes four sets of molds mounted on the rotary table 7 at 90 ° intervals. Each set of molds 11 includes a fixed mold 12 fixedly arranged on the rotary table 7, and a fixed mold 12. And a movable mold 13 that can be moved up and down by a predetermined amount with respect to the fixed mold 12. Although not shown, a guide pin is inserted through the fixed mold 12 and the movable mold 13, and the movable mold 13 can move only in the vertical direction along the guide pin. The mold 13 is configured so that it cannot be removed by the ascending limit restriction stopper.

  14 is a tailstock that is arranged below the fixed plate 6 and can move up and down with respect to the fixed plate 6, and 15 is arranged above the fixed plate 6 and can move up and down with respect to the fixed plate 6. The mold clamping plate 16 is composed of three tie bars having one end fixed to the tail stock 14 and the other end fixed to the mold clamping plate 15. The tail stock 14 and the mold clamping plate 15 are integrated by the tie bar 16. And are connected so as to move up and down. Of the three tie bars 16, the tie bar 16 positioned at the rotation center of the rotary table 7 is slidable in the vertical direction through the fixed plate 6 and the rotary joint 8, and the remaining two tie bars 16. Is slidable in the vertical direction through the fixed plate 6.

  Reference numeral 17 denotes a mold clamping motor (an electric servo motor for mold clamping) mounted on the tail stock 14, 18, and a ball screw mechanism in which a rotating portion (here, for example, a nut body) is rotatably held by the tail stock 14. The rotation of the mold clamping motor 17 is transmitted to the rotating portion of the ball screw mechanism 18, and the linearly moving portion (here, for example, the ball screw shaft) of the ball screw mechanism 18 screwed into the rotating portion thereby moves linearly (here, Move up and down). 19 is a known toggle link mechanism provided between the lower surface side of the fixed plate 6 and the upper surface side of the tail stock 14 (the lower surface side of the fixed plate 6 and the upper surface side of the tail stock 14 are connected). The cross head 19a, which is an input end of the force of the toggle link mechanism 19, is driven in a vertical direction by a linear motion portion of the ball screw mechanism 19 that converts the rotation of the mold clamping motor 17 into a linear motion, thereby driving or folding It is designed to be driven. Although not shown, the cross head 19a moves up and down along a plurality of guide shafts for rotation prevention.

  In the present embodiment, when the toggle link mechanism 19 is driven to extend, the tail stock 14 is driven downward with respect to the fixed plate 6, and the tie bar 16 and the mold clamping plate 15 are lowered integrally therewith, and the rotary table. 7 A mold clamping force is applied to a set of molds 11 at an injection position P1, which will be described later. Further, when the toggle link mechanism 19 is driven to be folded, the tail stock 14 is driven to rise with respect to the fixed plate 6, and the tie bar 16 and the mold clamping plate 15 are lifted integrally with this, and the mold 11 (movable) The clamping plate 15 is separated from the mold 13).

  FIG. 3 is an explanatory diagram viewed from above showing the relationship between the rotary table 7, the temperature control water circulation path / water leakage discharge path, the mold clamping plate 15, and the like. The rotary table 7 is intermittently driven by 90 ° in the direction of the arrow in FIG. 3, and the mold 11 that is stopped at the injection position P <b> 1 is clamped by the mold clamping plate 15. The mold 11 in the mold-clamped state is injected and filled with molten resin by the injection unit 3. The injection unit 3 moves forward and backward for each shot by a known nozzle touch / nozzle back mechanism, and the injection unit 3 moves forward to a resin injection port provided near the parting line surface of the mold 11. With the nozzle of the injection unit 3 being pressed, the molten resin is injected and filled into the cavity of the mold 11 in the mold-clamping state. When a predetermined pressure holding process time elapses after injection / filling, the injection unit 3 moves backward and retracts to a position that does not hinder the rotation of the rotary table 7. Further, at approximately the same time as this nozzle back operation, the mold clamping plate 15 is driven upward, and similarly, the mold clamping plate 15 is retracted to a position that does not hinder the rotation of the rotary table 7.

  The mold 11 that has been injected at the injection position P1 takes the first cooling position P2 when the turntable 7 rotates 90 °, takes the second cooling position P3 when the turntable 7 rotates 90 °, and takes the second cooling position P3. Further, the mold opening / ejecting position P4 is taken by the next 90 ° rotation. The mold opening / ejecting position P4 is provided with mold opening / ejecting means including a mold opening / ejecting plate 23, which will be described later, and the mold opening / ejecting means is moved to the mold opening / ejecting position P4. Opening of a certain mold 11 (upward movement of the movable mold 13) and ejection of a molded product from the mold 11 that has been opened (here, ejection of a molded product from the fixed mold 12) are performed. It is like that.

  The mold 11 at the mold opening / ejecting position P4 is provided with a molded product take-out machine 20 facing the mold 11 and a take-out arm capable of moving forward and backward of the molded product take-out machine 20 is provided on a back cover (not shown). The molded product that has entered the space above the rotary table 7 through the window and is ejected from the mold 11 is taken out of the machine (injection molding machine) through the window, and the molded product taken out is placed in a predetermined product storage area. It is supposed to be placed.

  FIG. 4 is an explanatory diagram showing a simplified configuration of the mold opening / ejecting means. In FIG. 4, reference numeral 21 denotes a mold opening / ejecting motor (electric servomotor for mold opening / ejecting) attached to the fixed plate 6, and 22 denotes a rotating portion (here, for example, a nut body) to the fixed plate 6. The rotation of the mold opening / ejecting motor 21 is transmitted to the rotating part of the ball screw mechanism 22 by the rotatably held ball screw mechanism, and thereby the linearly moving part of the ball screw mechanism 22 (here, For example, the ball screw shaft) moves linearly (here, moves up and down). Reference numeral 23 denotes a mold opening / ejecting plate disposed so as to be movable up and down by a predetermined amount on the lower side of the fixed plate 6. The mold opening / ejecting plate 23 includes an end portion of the linear moving part of the ball screw mechanism 22. Is fixed, and the mold opening / ejecting plate 23 is driven up or down by the driving force of the mold opening / ejecting motor 21.

  The mold opening / ejecting plate 23 moves up and down along a plurality of guide pins 24 suspended and fixed to the fixed plate 6. The mold opening / ejecting plate 23 includes a first mold opening pin 25. And the first eject pin 26 are erected and fixed. The first mold opening pin 25 and the first eject pin 26 can be moved up and down in the fixed mold 12 of the mold 11 in the mold opening / ejecting position P4 by being inserted through the through holes of the fixed plate 6 and the rotary table 7. It is said that. The fixed mold 13 is provided with a second mold opening pin 27 and a second eject pin 28 that are movable up and down by a predetermined amount. The second mold opening pin 27 is formed by the first mold opening pin 25. The second eject pin 28 can be pushed up and driven by the first eject pin 26.

  In the configuration shown in FIG. 4, when it is time to open the mold 11 at the mold opening / ejecting position P4, the mold opening / ejecting plate 23 is driven upward by the driving force of the mold opening / ejecting motor 21. First, the first mold opening pin 25 contacts the second mold opening pin 27. After this contact, the first mold opening pin 25 pushes up the second mold opening pin 27 and the movable mold 13 is raised. Mold opening is performed. When the movable mold 13 is raised by a predetermined amount, the first eject pin 26 then contacts the second eject pin 28. After the contact, the first eject pin 26 pushes up the second eject pin 28. The molded product 29 is ejected from the fixed mold 12, and during this time, the movable mold 13 is driven up by the projected amount of the molded product 29. After the ejection of the molded product 29 is completed, the driving of the mold opening / ejecting motor 21 is stopped, and the molded product 29 thus ejected is taken out by the molded product take-out machine 20. Thereafter, mold closing is started at an appropriate timing (or a predetermined operation by the operator). In this mold closing process, the mold opening / ejecting plate 23 is driven downward by the driving force of the mold opening / ejecting motor 21. Together with this, the first mold opening pin 25 and the first eject pin 26 are also lowered. Thereby, the movable mold 13 is lowered by its own weight, and the second mold opening pin 27 and the second eject pin 28 pushed by the movable mold 13 are also lowered.

  In addition, as shown in FIG. 3, the temperature of water for adjusting the mold temperature is controlled (for example, the water temperature is controlled by feedback control using a known PID operation) at an appropriate location of the machine, and the temperature is adjusted. A water temperature adjusting / flowing water circulation device 31 having a function of collecting the temperature-controlled water circulated in a route described later and sending it out again is installed. The water temperature adjusting / flowing water circulation device 31 and the fixed side described later of the rotary joint 8 located at the center of the rotary table 7 are connected by an inflow temperature adjustment pipe 32 and an outflow temperature adjustment pipe 33. The temperature adjustment water sent from the water temperature adjustment / flow water circulation device 31 through the inflow temperature adjustment pipe 32 to the rotary joint 8 circulates in a path described later, and then passes through the temperature adjustment pipe 33 for outflow from the rotary joint 8. The water temperature is adjusted and returned to the circulating water circulation device 31.

  The rotary joint 8 and each mold 11 are connected by an inflow temperature control pipe 34 and an outflow temperature control pipe 35, and the rotary joint 8 passes through the inflow temperature control pipe 34 to the mold 11. The sent temperature-controlled water circulates in the mold 11, and then returns to the rotary joint 8 from the mold 11 through the outflow temperature-controlled water piping 35. The temperature adjustment water is first fed from the rotary joint 8 to the fixed mold 12 of the mold 11, and the temperature adjustment water circulated in the fixed mold 12 has a margin in length from the fixed mold 12. The temperature-controlled water that has been sent to the movable mold 13 through the temperature-controlling water pipe 36 for inflow outside the mold made of a hose and circulated in the movable mold 13 has an extra length from the movable mold 13. It is returned to the fixed mold 12 through a temperature adjusting water pipe 37 for flowing out of the mold comprising a hose, and the returned temperature adjusting water is returned to the rotary joint 8.

  Further, as shown in FIG. 3, a connection receiving portion 41 that constitutes a part of a path through which water leaked from the rotary joint 8 is led out of the machine is disposed on the outer peripheral portion of the rotary table 7. The pipe line in the connection receiving portion 41 is connected via a drain piping 42 to a water leakage annular groove to be described later for guiding and storing water leaking from the rotary joint 8. An ejector 43, which will be described in detail later, is arranged at a position near the rotary table 7 on the fixed plate 6. The connection receiving portion 41 faces the ejector 43 every rotation of the rotary table 7. . The pipe line in the ejector 43 can be connected to the pipe line in the connection receiving part 41, and in the state where the pipe line in the connection receiving part 41 and the pipe line in the ejector 43 are connected, the water leakage described later The water stored in the annular groove for storage is sucked out by the ejector 43 through the drain pipe 42 and the connection receiving portion 41 and led out of the machine from the external drain pipe 44.

  FIG. 5 is a cross-sectional view of the rotary joint 8. The rotary joint 8 includes a fixed side 51 fixed to the fixed plate 6 (not shown in FIG. 5) by bolts 75 and a rotary side 52 fixed to the rotary table 7. The holding cylinder 77 is rotatably held by members fixed via a bearing 76 (the fixed side 51 of the rotary joint 8 and the fixed plate 6). Although not shown in FIG. 5, the tie bar 16 is inserted into the center hole 53 of the fixed side 51 through a sliding bush so as to be slidable. On the fixed side 51, the temperature adjustment water from the water temperature adjustment / flow water circulation device 31 is introduced (to which the temperature adjustment water pipe 32 for inflow is connected), and the water temperature adjustment / flow water circulation device 31 is heated. A lead-out port 55 for leading out the water conditioning (to which the temperature regulating water pipe 33 for outflow is connected) is formed. The introduction port 54 communicates with four outlets 58 formed at intervals of 90 ° on the rotation side 52 via a pipeline 56 on the fixed side 51 and an annular pipeline 57 on the rotation side 52. Each outlet 58 is connected to a temperature control water pipe 34 for inflow to each mold 11. In addition, on the rotation side 52, four inlets 59 to which the temperature adjusting water pipe 35 for outflow from each mold 11 is connected are formed at intervals of 90 °. The introduction port 59 communicates with the outlet port 55 on the fixed side 51 through the annular pipe line 60 on the rotation side 52 and the pipe line 61 on the fixed side 51. In addition, seals 62 for preventing water leakage are provided above and below the annular conduits 57 and 60 for transferring the temperature-controlled water between the fixed side 51 and the rotating side 52.

  Even if the seal 62 is provided on the contact surface (rotation sliding surface) between the fixed side 51 and the rotation side 52, as described above, the seal 62 deteriorates due to rotational wear, and the rotary joint 8 It is inevitable that water leaks from the contact surface (rotating sliding surface) between the fixed side 51 and the rotating side 52. Therefore, in the present embodiment, a water leakage reservoir annular groove 64 is formed on the upper surface of the lower flange 63 of the rotation side 52, and the leakage reservoir annular groove 64 is formed from the contact surface between the fixed side 51 and the rotation side 52. The leaked water is configured to be guided and accumulated through a plurality of introduction holes 65 provided in the lower part of the rotation side 52. The bottom of the water leakage reservoir annular groove 64 is electrically connected to a drain pipe connecting portion 67 via a pipe 66 in the flange 63, and the drain pipe 42 is connected to the drain pipe connecting portion 67.

  A water-absorbing coloring paper 68 is attached to the annular groove 64 for collecting water, and when water accumulates in the annular groove 64 for collecting water, a color is generated. The fact that water has accumulated in the groove 64 is informed.

  FIG. 6 is a diagram showing the relationship among the rotary joint 8, the connection receiving portion 41, and the ejector 43. As shown in FIG. 6, the water leakage reservoir annular groove 64 on the fixed side 51 of the rotary joint 8 is connected to the pipe 71 in the connection receiving portion 41 fixed on the rotary table 7 through the drain pipe 42 and the like. Yes. The connection receiving portion 41 is provided with a connection receiving seat 72 to which the end portion of the pipe connection body 81 of the ejector 43 can contact and separate.

  The ejector 43 includes a pipe connecting body 81 that is driven forward and backward by air pressure, and a holding body 82 that holds the pipe connecting body 81 so that the pipe connecting body 81 can move forward and backward. The holding body 82 is fixed. It is fixed on the plate 6. In the present embodiment, the water suction means for sucking out the water stored in the annular groove 64 for storing the water leak via the drain pipe 42 and the connection receiving portion 41 includes the ejector 43 and the compressed air source for supplying the ejector 43 with the compressed air. 83, and a direction switching valve 84 provided in an air pipe connecting the compressed air source 83 and the ejector 43. The ejector 43 is provided with a forward air chamber 85 and a backward air chamber 86, and the pipe connection body 81 has a pipe line 87 passing through the axial center thereof and a forward air chamber 85. And an air discharge thin tube 88 for sending the compressed air sent to the outside (in this case, the external drainage pipe 44).

  When the water sucking means does not suck water, the pipe connection body 81 of the ejector 43 is in the retracted position, and at this time, the direction switching valve 84 is in the neutral position. When the machine operator recognizes that the water leaked from the rotary joint 8 has accumulated in the water leakage annular groove 64 due to the color of the water-absorbing coloring paper 68, a controller (not shown) that controls the entire machine is controlled. Instruct the appropriate operation unit to suck out the water leakage. In response to this, the controller responds to a valve driver (not shown) that drives and controls the direction switching valve 84 at the timing when the rotation table 7 reaches the rotation stop position where the connection receiving portion 41 faces the ejector 43. A predetermined drive command is given to switch the direction switching valve 84 to the right position in FIG. As a result, the compressed air from the compressed air source 83 is sent into the forward air chamber 85 of the ejector 43, the pipe connection body 81 moves forward, and the end of the pipe connection body 81 is connected to the connection receiving portion 41. By being pressed against the seat 72, the pipe 71 of the connection receiving portion 41 and the pipe 87 of the pipe connector 81 communicate with each other. Compressed air is continuously fed into the advance air chamber 85, and the compressed air discharged (injected) from the advance air chamber 85 through the air discharge thin tube 88 to the outside via the pipe line 87, A negative pressure is generated on the left side of the pipe line 87 in FIG. 6, whereby the water stored in the annular groove 64 for storing water leaks passes through the pipe 66, the drain pipe 42, the connection receiving portion 41, and the ejector 43. The compressed air is sent to the outside (external drainage pipe 44 here).

  When the discharge of the water in the water leakage reservoir annular groove 64 is completed, the controller (not shown) gives a predetermined drive command to a valve driver (not shown) to switch the direction switching valve 84 to the left position in FIG. . As a result, the compressed air from the compressed air source 83 is sent into the retreat air chamber 86 of the ejector 43, the pipe connection body 81 is moved backward, and the end of the pipe connection body 81 is connected to the connection receiving portion 41. Separate from the seat 72. When the pipe connection body 81 takes the retracted position, the controller (not shown) switches the direction switching valve 84 to the neutral position.

  In the above description, the controller controls the direction switching valve 84. However, in some cases, the operator may perform an operation of switching the direction switching valve 84 directly.

  As described above, according to this embodiment, even if water leaks from the rotary joint 8 due to use over time, water leaks from the contact surface (rotating sliding surface) between the fixed side 51 and the rotating side 52 of the rotary joint 8. The water stored in the annular groove for water leakage 64 formed on the upper surface of the flange 63 on the lower side of the rotation side 52 is stored in the annular groove 64 for water leakage. Through the connection receiving part 41 on the outer peripheral part, it is led out of the machine by water sucking means (ejector 43, compressed air source 83, direction switching valve 84) including a pipe connection body 81 selectively connected to the connection receiving part 41. Therefore, the water leaking from the rotary joint 8 can be easily and easily removed. Further, even if it is difficult to disassemble and repair the rotary joint 8, it is possible to perform the molding operation without any trouble for a long time without disassembling and repairing the rotary joint 8.

1 is a partially broken front view of an injection molding machine according to an embodiment of the present invention. It is explanatory drawing seen from the simplified front of the clamping unit in the injection molding machine which concerns on one Embodiment of this invention. In the injection molding machine which concerns on one Embodiment of this invention, it is explanatory drawing seen from the upper direction which shows the relationship between a rotary table, the circulation path of temperature-controlled water / the discharge path of water leakage, a mold clamping plate, etc. FIG. It is explanatory drawing which simplifies and shows the structure of the mold opening / ejecting means in the injection molding machine which concerns on one Embodiment of this invention. It is sectional drawing of the rotary joint in the injection molding machine which concerns on one Embodiment of this invention. It is a figure which shows the relationship between a rotary joint, a connection receiving part, and an ejector in the injection molding machine which concerns on one Embodiment of this invention.

Explanation of symbols

1 Machine base frame 2 Base panel 3 Lateral injection type injection unit (injection system mechanism)
4. Vertical clamping type mold clamping (mold opening / closing) unit (mold clamping (mold opening / closing) mechanism)
5 Support frame 6 Fixing plate 7 Rotary table 8 Rotary joint 9 Table rotation motor (electric servomotor for table rotation)
DESCRIPTION OF SYMBOLS 10 Rotation transmission mechanism 11 Mold 12 Fixed mold 13 Movable mold 14 Tail stock 15 Mold clamping plate 16 Tie bar 17 Mold clamping motor (electric servo motor for clamping)
18 Ball screw mechanism 19 Toggle link mechanism 19a Crosshead P1 Injection position P2 First cooling position P3 Second cooling position P4 Mold opening / ejecting position 20 Mold take-out machine 21 Mold opening / ejecting motor (Electric servomotor for mold opening / ejecting )
22 Ball Screw Mechanism 23 Mold Opening / Eject Plate 24 Guide Pin 25 First Mold Opening Pin 26 First Ejecting Pin 27 Second Mold Opening Pin 28 Second Ejecting Pin 29 Molded Product 31 Water Temperature Adjusting / Flowing Water Circulating Device 32 Inflow Temperature Controlled Water Piping 33 Temperature control water piping for outflow 34 Temperature control water piping for inflow 35 Temperature control water piping for outflow 36 Temperature control water piping for inflow 37 Temperature control water piping for outflow 41 Connection receiving portion 42 Drain piping 43 Ejector 44 External drain piping REFERENCE SIGNS LIST 51 Fixed side 52 Rotating side 53 Center hole 54 Inlet port 55 Outlet port 56 Fixed side pipe line 57 Annular pipe formed between fixed side and rotating side 58 Rotating side outlet port 59 Rotating side inlet port 60 Annular pipe line formed between the fixed side and the rotating side 61 A pipe line on the fixed side 62 Seal 63 Flange 64 Annular groove for water leakage reservoir 65 Introduction hole 6 Pipe in flange 67 Drain pipe connection 68 Water absorption color paper 71 Pipe line in connection receiving part 72 Connection receiving seat 75 Bolt 76 Bearing 77 Holding cylinder 81 Pipe connecting body 82 Holding body 83 Compressed air source 84 Direction switching valve 85 Forward Air chamber 86 Retreat air chamber 87 Pipe connection pipe line 88 Pipe connection air discharge capillary

Claims (4)

A fixed plate arranged in a fixed manner, a rotary table held so as to be rotatable on the fixed plate, and a rotation center portion of the rotary table, the fixed side of which is fixed to the fixed plate, A rotary joint whose rotating side is fixed to the rotary table, water temperature adjusting / flowing water circulation means for supplying temperature adjusting water to the rotary joint and collecting temperature adjusting water from the rotary joint, and the like on the rotary table A plurality of molds arranged at an angle, and a temperature control water pipe connecting each mold and the rotary joint to circulate water for temperature control through the rotary joint in each mold. In injection molding machine,
In order to guide and store water leaked from the contact surface between the fixed side and the rotating side of the rotary joint, an annular groove for water leakage reservoir formed on the upper surface of the lower flange on the rotating side of the rotary joint;
A connection receiving means disposed on an outer peripheral portion of the rotary table and connected via the annular groove for leaking water storage and a drain pipe;
A water suction means including a pipe connection body arranged at a position near the rotary table in the fixed table and capable of moving forward and backward so as to be able to contact and separate from the connection receiving means;
An injection molding machine comprising: The injection molding machine according to claim 1,
The water suction means includes an ejector comprising a pipe connection body that can move forward and backward, and a holding portion that holds the pipe connection body so that the pipe connection body can move forward and backward, a compressed air source that supplies compressed air to the ejector, and the compression An injection molding machine comprising: a direction switching valve provided in an air pipe between an air source and the ejector. The injection molding machine according to claim 2,
The injection molding machine, wherein the ejector and the connection receiving means face each other at a predetermined rotation stop position of the rotary table. The injection molding machine according to claim 1,
An injection molding machine characterized in that a water-absorbing coloring means is provided at the bottom of the annular groove for collecting water leakage.

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