JP2018034470A - Rotary type injection molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary type injection molding machine using a fluid for operation of a mold member or a cramp of the mold member, for achieving securement of responsibility to operation of a mold member or the cramp of the mold member, or suppression of pressure loss of the fluid, and making mold exchange easy.SOLUTION: In a rotary type injection molding machine 11 using a fluid for operation of a mold member 15 and a cramp 35 of the mold member 15, where a movable plate 18 is mold opened/closed in a horizontal direction against a fixing plate 17, a rotary table 31 to which a mold member 15 is attached is rotatably arranged to one plate of the fixing plate 17 or the movable plate 18, a valve 52 for the fluid is arranged in a radial direction outer peripheral side than a mold member attachment position 26 of the rotary table 31.SELECTED DRAWING: Figure 3

Description

According to the present invention, the movable platen is opened and closed horizontally with respect to the fixed platen, and a rotary table to which the die member is attached is rotatably provided on one of the fixed platen and the movable platen. The present invention relates to a rotary injection molding machine in which a fluid is used for clamping.

The movable platen is opened and closed horizontally with respect to the fixed platen, and a rotary table to which the mold member is attached is provided so as to be rotatable on either the fixed platen or the movable platen, and for the operation of the mold member or clamping of the mold member. As a rotary injection molding machine in which a fluid is used, the one described in Patent Document 1 is known. In Patent Document 1, a movable mold is provided with a core of a mold member that is operated by hydraulic pressure. A flexible long hydraulic pipe is provided along the outer periphery of the turntable toward each movable mold for operating the core. However, there is no description of how the core is operated in Patent Document 1, and no valve is provided in the path from the moving block to the mold in FIGS. Therefore, in the case of operating the movable mold core from a hydraulic device having a valve or the like via a long flexible hydraulic pipe as in Patent Document 1, the distance from the valve becomes longer. There is a problem that the responsiveness of the child is inferior. Moreover, it is easy to cause the pressure loss of the hydraulic fluid supplied with it.

Further, although it is not a rotary type injection molding machine that opens and closes in the horizontal direction, Patent Document 2 discloses that in a rotary type injection molding machine that opens and closes in the vertical direction, hydraulic pressure is applied to a mold clamping device that attaches a mold to a turntable. The ones used are listed. In Patent Document 2, since the valve device 12 is provided on the rotating disk, the distance between the valve device and the clamp device is short, and the problem of poor response as in Patent Document 1 does not occur. It is also considered excellent in that the pressure loss of the supplied hydraulic oil can be suppressed. Furthermore, in the case of a rotary injection molding machine that supplies hydraulic oil from the center axis side of the rotating disk to the mold clamping device of the rotating disk as in Patent Document 2, a valve device is provided on the center axis side, From there, it seems reasonable to connect the pipe to the mold clamping device from the viewpoint of shortening the overall length of the pipe.

JP 2012-224008 A (Claim 1, Claim 2, FIG. 1) Japanese Patent Laid-Open No. 61-248713 (Claims, Effects of the Invention, Drawing)

However, since the valve device is provided in the center side of the surface of the rotating disk on the center side with respect to the mold mounting position, the valve device becomes an obstacle when mounting the mold. Especially when the mold is loaded from one direction orthogonal to the mold opening / closing direction of the rotary table when the mold is exchanged, such as a rotary injection molding machine that opens and closes in the horizontal direction, the mold is the center of the rotary table. Since it passes through the vicinity of the front surface of the part and is moved to the mounting position, if a valve device is provided on the center side, it will be an obstacle when the mold is loaded.

Therefore, in the present invention, in view of the above problems, the movable platen is opened and closed horizontally with respect to the fixed platen, and a rotary table to which the die member is attached is provided rotatably on one of the fixed platen or the movable platen, In a rotary injection molding machine that uses fluid to actuate a mold member or clamp the mold member, ensure the responsiveness in the actuation of the mold member or clamp the mold member, or suppress the pressure loss of the fluid, and replace the mold. It is an object of the present invention to provide a rotary injection molding machine that facilitates.

In the rotary injection molding machine according to claim 1 of the present invention, the movable table is opened and closed horizontally with respect to the stationary platen, and the rotary table to which the mold member is attached is one of the stationary platen and the movable platen. In the rotary type injection molding machine that is provided so as to be rotatable with respect to the mold member and is used for clamping the mold member, the valve for the fluid is disposed radially outward from the mold member mounting position of the rotary table. It is provided.
The rotary injection molding machine according to claim 2 of the present invention is the rotary injection molding machine according to claim 1, wherein the valve is provided on the surface of the rotary table that is opposite to the side where the mold member is inserted when the mold member is replaced. It is characterized by.
A rotary injection molding machine according to claim 3 of the present invention is the rotary injection molding machine according to claim 2, wherein a connecting device for supplying and discharging a temperature adjusting fluid to and from the mold member is provided on the side of the rotary table on which the valve is provided. It is characterized by.
According to a fourth aspect of the present invention, there is provided the rotary type injection molding machine according to the second or third aspect, wherein the valve is connected to a connecting device for supplying and discharging the fluid to and from the mold member. The side of the mold member that is inserted when the mold member is replaced is provided with a connection member on the mold member side that is connected to the connection device.

In the rotary injection molding machine of the present invention, the movable plate is horizontally opened and closed with respect to the fixed plate, and the rotary table to which the mold member is attached is rotatable with respect to the fixed plate or one of the movable plates. In the rotary type injection molding machine that is provided and fluid is used to actuate the mold member or clamp the mold member, the fluid valve is provided on the outer peripheral side in the radial direction from the mold member mounting position of the rotary table. It is possible to secure the responsiveness in the mold operation or the mold clamp, or to suppress the pressure loss of the fluid, and to easily exchange the mold.

It is a side view at the time of mold closing of the rotary type injection molding machine of this embodiment. It is a top view of the rotary type injection molding machine containing the mold member exchange mechanism of this embodiment. It is an arrow line view of the AA line of FIG. It is a schematic diagram of the valve | bulb and hydraulic device which are used for the metal mold | die operation | movement or metal mold clamp of the rotary type injection molding machine of this embodiment. It is a figure which shows the principal part of the rotary type injection molding machine of another embodiment.

An outline of a rotary injection molding machine according to an embodiment of the present invention will be described with reference to FIGS. The rotary type injection molding machine 11 of the present invention is basically composed of a mold clamping device 13 provided on one side in the longitudinal direction on the base 12 and injection devices 14 a and 14 b provided on the other side in the longitudinal direction on the base 12. The essential part is composed. In the rotary injection molding machine 11, the movable table 18 is horizontally opened and closed with respect to the fixed plate 17 fixedly provided on the base 12 of the mold clamping device 13, and the rotary table 31 to which the mold member 15 is attached. Is provided to be rotatable with respect to one of the fixed platen 17 and the movable platen 18.

The injection devices 14a and 14b are well known, and usually two injection devices are provided in parallel for the purpose of injecting different materials. The arrangement of the injection device is not limited to that shown in FIG. 2, and one of the two injection devices is provided on the side of the mold clamping device with the nozzle facing the mold side. Or a device having three or more injection devices.

With respect to the mold clamping device 13, mold clamping cylinders 19 of the mold clamping mechanism are provided in the vicinity of the four corners of the stationary platen 17, and the rods of the mold clamping cylinder 19 serve as tie bars 20. Therefore, as shown in FIG. 3, two tie bars 20 are provided at the top and bottom. The mold clamping cylinder 19 is connected to a hydraulic device 37 shown in FIG. A servo motor 22 of the mold opening / closing mechanism 21 is fixed on the base 12 (or the fixed platen 17), and a ball screw is pivotally supported. On the other hand, a ball nut of a mold opening / closing mechanism 21 is fixed to the movable platen 18, and a ball screw is inserted through the ball nut. The movable platen 18 can be opened and closed in the horizontal direction with respect to the fixed platen 17. (In FIG. 2, the mold opening / closing mechanism 21 on the counter-operation side B, which is the upper side, is omitted.) As in the present invention, the mold clamping device 13 that moves the movable platen 18 in the horizontal direction includes the movable platen. In comparison with a mold clamping device that moves up and down in the vertical direction, it is often possible to shorten the molding cycle time and reduce power consumption. The mold clamping device may use a different mechanism such as a toggle mechanism, and the mold opening / closing mechanism 21 may also be a different mechanism such as a hydraulic cylinder.

A concave hole 17b into which the nozzles of the two injection devices 14a and 14b can be inserted is formed in the surface of the fixed plate 17 on the injection device side. As shown in FIG. 1, a mold member moving mechanism 24 capable of moving the mold member 15 in the horizontal direction is provided on the lower side of the mold member mounting surface 17 a of the fixed platen 17. The mold member moving mechanism 24 includes a plurality of rolling rollers 25 arranged in a line in the horizontal direction. A mounting surface 23 b (lower surface) of the mold mounting plate 23 can be mounted on the upper surface of the roller 25.

A hydraulic clamp mechanism 27 that is a fixing mechanism on the fixing side of the mold member 15 to be described later is provided at two locations on the upper side and the lower side of the mold member mounting surface 17a of the fixed platen 17. The mold mounting plate 23 is fixed to the stationary platen 17 by a hydraulic clamp mechanism 27 that performs mold mounting using a total of four fluids. In addition to the hydraulic clamp mechanism 27, the fixing mechanism for fixing the mold mounting plate 23 of the mold member 15 to the fixing plate 17 is an electromagnetic lock type clamping device, a magnet clamping device using an electromagnet, and a bolt for fixing the mold mounting plate 23 with a bolt. A fixing mechanism for fixing may be used.

With respect to the movable platen 18, the tie bars 20 are respectively inserted into holes near the four corners of the movable platen 18. Half nuts 28 are provided in the vicinity of the four corners on the back surface of the movable platen 18 so that they can be engaged and disengaged with a locking groove (not shown) of the tie bar 20. An ejector mechanism (not shown) is provided on the back side of the movable platen 18. Further, a servo motor 29 of a rotation mechanism for rotating the rotary table 31 is attached to the upper surface of the movable platen 18. Further, a guide block 30 for sliding the movable plate 18 on the base 12 is provided on the lower surface side of the movable plate 18.

Next, the mold member 15 of the rotary injection molding machine 11 will be described. In this embodiment, two fixed molds 16a and 16b are fixed to the front surface 23a of the mold mounting plate 23 with bolts or the like. Two rotary molds 33a and 33b are fixed to the front surface 34a of the mold mounting plate 34 on the rotary table side with bolts or the like. The lower surfaces of the mold mounting plates 23 and 34 serve as mounting surfaces 23b and 34b when the mold member 15 is carried in at the time of replacement. The mold member 15 is attached to the stationary platen 17 or the rotary table 31 by clamping the surfaces of the mold attachment plates 23 and 34 by hydraulic clamp mechanisms 27 and 35 described later. Holes or nozzle touch surfaces into which the nozzles of the two injection devices 14a and 14b can be inserted are formed in the fixed-side mold mounting plate 23.

The fixed molds 16a and 16b are connected to a temperature control hose on the surface that becomes the operation side C (the lower side of the mold clamping device in FIG. 2) when the fixed-side mold member 15 is fixed to the fixed platen 17. A coupler socket 63 or the like is provided. Therefore, when the operator carries in the mold member 15 from the non-operation side B, the operator can easily attach / remove the temperature control hose or the like only from the operation side C. In FIG. 1 etc., the hydraulic oil hose connected to the hydraulic clamp mechanism 27 on the fixed platen side and the temperature control hose connected to the socket part 63 are not shown.

The rotary molds 33a and 33b are also connected to a temperature control hose connecting device on the surface which becomes the operation side C when the rotary molds 33a and 33b are exchanged and fixed to the rotary table 31 via the mold mounting plate 34. Coupler socket parts 63, 63, which are connecting devices for connecting pipes 56a, 56b of hydraulic cylinders 54a, 54b for operating the socket parts 62, 62 of the coupler and the core parts 53a, 53b, are provided. In other words, the temperature control hose connection device and the connection pipes 56a and 56b are provided on the operation side C of the surface opposite to the side where the mold member is inserted when the mold member is replaced. This makes it easy to install and remove hoses and pipes. The rotating molds 33a and 33b and the stationary molds 16a and 16b are not excluded from the case where the temperature control hose connection device and the hydraulic oil piping connection device are provided on different side surfaces.

The number of molds fixed to the mold mounting plate 34 on the rotary table side of the mold member 15 and the mold mounting plate 23 on the other side is not limited, and may be one or a plurality of three or more. Further, the mold member 15 does not include a mold mounting plate, and may be composed of a fixed mold and a rotating mold. In that case, only the rotary die is attached to the die member attachment position 26 of the rotary table 31 as a die member.

Next, the rotary table 31 provided so as to be rotatable with respect to the movable platen 18 will be described. The rotary table 31 is rotatable on the surface 18a on the fixed platen side of the movable platen 18 (the surface facing the fixed platen 17 which is the other plate) (including that which is rotated at a certain angle and reversed after being stopped). Installed on. The rotary table 31 is a disk-shaped disc body having a constant thickness, and a cylindrical rotary shaft 32 is fixed to the center position of the rotary table 31 toward the anti-fixed disc side. The rotating shaft 32 of the rotary table 31 is inserted into a central through hole of the movable platen 18 via a bearing or bush (not shown). Accordingly, the rotary table 31 is rotated around the horizontal axis. Further, the rotary molds 33a and 33b of the mold member 15 can be attached to the surface 31a of the rotary table 31 (the surface facing the fixed platen 17 as the other plate).

On the outer peripheral portion 31 b of the rotary table 31, teeth that engage with the timing belt 43 that rotates the rotary table 31 are formed. The timing belt 43 is stretched over both the driving pulley of the servo motor 29 for rotating the rotary table provided on the movable platen 18 and the teeth formed on the outer peripheral portion 31b of the rotary table 31. The rotation mechanism of the turntable 31 is not limited to the above. In addition, the movable platen 18 may be provided with a mechanism for advancing the rotary table 31 by a certain amount when rotating the rotary table 31, a mechanism for guiding the rotation, or the like.

In addition, a hole for inserting a positioning pin is provided at a position (symmetrical position) that is 180 ° away from the rotation center O on the outer peripheral portion 31b of the rotary table 31 or on the rear surface on the outer peripheral side. Further, a rotary table fixing mechanism 45 having a hydraulic cylinder and a positioning pin attached to its rod is provided at the position adjacent to or on the back surface of the upper and lower rotary tables 31 on the fixed plate side surface 18a of the movable platen 18, respectively. It has been.

A clamping mechanism on the rotary table side of the mold member 15 is used at two locations on one side and two locations on the other side from the rotation center O (center of the rotary shaft 32) of the surface 31a of the rotary table 31, and fluid is used. A hydraulic clamp mechanism 35 is provided. The mold mounting plate 34 of the mold member 15 is fixed to the mold member mounting position 26 including the rotation center O of the surface 31a of the rotary table 31 by the hydraulic clamp mechanisms 35 in total of four locations. Here, the fixing mechanism of the mold member 15 is the hydraulic clamping mechanism 35, but other mechanisms may be used similarly to the fixing platen side. An air cylinder 36 for positioning and fixing the mold mounting plate 34 is provided between the upper hydraulic clamp mechanisms 35 and 35. The air cylinder 36 is also included in a mold clamping mechanism using a fluid.

Further, a mold member moving mechanism 38 is provided on one side with respect to the rotation center O of the surface 31 a of the turntable 31. The mold member moving mechanism 38 includes a plurality of rolling rollers 39 arranged in a line in the string direction with respect to the rotation center O of the rotary table 31. A mounting surface 34 b (lower surface) of the mold mounting plate 34 of the mold member 15 can be mounted on the upper surface of the rolling roller 39. Note that the mold member moving mechanism 24 of the fixed platen 17 and the mold member moving mechanism 38 of the rotary table 31 are not limited to those using the rolling roller 39, but using a rolling ball, a highly lubricated sliding plate, or the like. It may be a thing.

A stopper member 44 is fixed on the opposite side of the surface 31a of the turntable 31 from the side where the mold member 15 is loaded when the mold member 15 is stopped for replacement. The stopper member 44 is a member for positioning the mold attachment plate 34 of the mold member 15 carried in from the counter-operation direction with respect to the movable platen 18.

Next, the working mechanism of the mold member using the fluid or the clamping mechanism of the mold member will be described with reference to FIG. The hydraulic device 37 provided on the base 12 or the floor includes a pump 40, a tank 42, a valve (not shown), and the like. A supply pipe 46 is connected to supply hydraulic fluid (fluid) of a mold member actuation mechanism or mold member clamp mechanism of the rotary table 31 from the hydraulic device 37. Further, a discharge pipe 47 for returning hydraulic oil from the mold member operating mechanism or the mold member clamping mechanism toward the tank 42 is connected. Here, the supply pipe 46 and the discharge pipe 47 are flexible hoses, and are located outside the mold member mounting position 26 of the rotary table 31 through the inside of the hollow rotary shaft 32 and the inside of the rotary table 31. Connected up to. In the present embodiment, since the supply pipe 46 and the discharge pipe 47 are each one, the internal structure of the rotary shaft 32 and the like is not complicated, and the pressure loss of hydraulic pressure can be minimized.

On the other hand, on the outer peripheral side in the radial direction from the mold member mounting position 26 on the surface 31a of the rotary table 31 (from the portion in contact with the mold member 15 on the radial line from the rotation center O of the rotary table 31 toward the outer peripheral part 31b). (The outer part) is provided with a valve for fluid. When the stopper member 44 is provided on the rotary table 31, a fluid valve is provided on the outer side of the stopper member 44. In other words, the fluid valve is provided near the outer periphery in the direction perpendicular to the clamping direction of the hydraulic clamping mechanism 35 when viewed from the rotation center O of the rotary table 31, and the side on which the fluid valve is not provided is the carry-in of the mold member 15. On the side. In the present embodiment, the fluid valve is a solenoid-operated three-position switching valve 52 (in the present embodiment, four units 52a, 52b, 52c, and 52d). The supply pipe 46 is connected to a P port such as the three-position switching valve 52a, and the discharge pipe 47 is connected to a T port such as the three-position switching valve 52a.

In FIG. 4, connecting pipes 55a and 55b are connected to the A port and B port of the two three-position switching valves 52a and 52d, respectively, and the connecting pipes 55a and 55b are hydraulic pressures that are clamping mechanisms for the mold members. It is connected to a hydraulic cylinder 65 of the clamp mechanism 35. In this embodiment, hydraulic fluid is supplied from one three-position switching valve 52a or 52d to the hydraulic cylinders 65 of the two hydraulic clamp mechanisms 35. Further, connecting pipes 56a and 56b, which are connecting devices, are connected to the A port and B port of the other three-position switching valves 52b and 52c, respectively. The connecting pipes 56a and 56b are flexible hoses and have a length that can be connected to a socket portion 63 that is a connecting device for the rotary molds 33a and 33b attached to the rotary table 31. Coupler plugs 57 and 57, which are devices connected to the rotary molds 33a and 33b, are attached to the connection pipes 56a and 56b, respectively. When the plug parts 57, 57 of the connection pipes 56a, 56b are connected to the socket parts 63, 63 of the rotary molds 33a, 33b, the rotary molds 33a, 33c are connected via the three-position switching valves 52b, 52c. The hydraulic oil is supplied to the hydraulic cylinders 54a and 54b for operating the core portions 53a and 53b of 33b.

In addition to the three-position switching valve (three-position four-way control valve) controlled by a solenoid, the valve for fluid may be operated by pilot pressure or manually operated, including the number of positions, etc. The type of is not limited. In the present embodiment, these fluid valves are collectively attached to the manifold block 61 and attached to the surface 31 a of the rotary table 31. However, the valves may be individually attached to the rotary table 31. Needless to say, the number of valves for these fluids is changed in accordance with the number of mold member actuation mechanisms or mold member clamp mechanisms. Further, the type and structure of the connected device are not limited to the above.

As an operating mechanism of the mold member, the core portion 53a. In addition to those for operating 53b, hydraulic cylinders for operating some mold members such as a valve gate and gate cutter of a hot runner (not shown) may be used. In particular, high responsiveness is required for those that need to operate the valve gate, gate cutter, core portion, etc. at a predetermined timing from the start of injection to the end of holding pressure. The clamping mechanism for the mold member includes a positioning mechanism for the mold member (mold) in addition to the hydraulic clamping mechanism 35 for the mold member (mold). The fluid and the fluid valve may be actuated by at least one of a mold member actuation mechanism and a mold member clamp mechanism. The fluid used in the mold member actuating mechanism or the mold member clamping mechanism may be a liquid other than hydraulic oil or a gas such as air when the air cylinder is operated.

Further, the three-position switching valve 52, which is a valve for the fluid, is configured so that when the rotary table 31 is stopped when the mold is replaced, the rotary mold is separated from the rotation center O of the rotary table 31 and the mold mounting position 26. Provided on the surface 31a of the turntable 31 on the insertion side C of 33a, 33b (the opposite side to the non-operation side B where insertion is performed). As shown in FIG. 3, in this embodiment, the relay box 58 for temperature control piping is also provided on the surface 31 of the rotary table 31 on the same side as the fluid valve (three-position switching valve 52). A temperature control pipe 59 for supply and a temperature control pipe 60 for discharge are connected from the relay box 58 to the rotary molds 33a and 33b. Note that the mold member 15 may be carried out and carried into the rotary injection molding machine 11 from between the upper and lower tie bars 20 and 20 on the operation side C. In this case, the rotary table is used to replace the mold. It is desirable that a fluid valve or the like is disposed at a position that becomes the non-operation side B when 31 is stopped. That is, when carrying in / out of the mold member 15 from the operation side C, the right side of the mold member moving mechanism 38 provided on the surface 31a of the turntable 31 in the same view as in FIG. A fluid valve or the like is disposed in the front. Further, when carrying out and carrying in the mold member 15 from between the two upper tie bars 20 and 20 using a crane, a valve for fluid is arranged at a position below the rotary table 31 when stopped. Is done.

As for the mold member replacement mechanism 41, two rails 48 are provided on the side of the rotary injection molding machine 11 (here, the non-operation side B), and the mold member replacement carriage 49 moves on the rail 48. It can be moved in the mold opening and closing direction by a hydraulic cylinder 64 or the like. The mold member exchange carriage 49 is provided with a carry-out stage 50 for lowering the molded mold member 15 and a carry-in stage 51 for placing the mold member 15 to be molded next time.

Next, a method for replacing the mold member 15 of the rotary injection molding machine 11 will be described. As shown in FIG. 2, the mold member replacement carriage 49 has a carriage mold member replacement position where the unloading stage 50 for lowering the molded mold member 15 faces the gap between the fixed platen 17 and the movable platen 18 when the mold is closed ( Stopped at the unloading position). A mold member 15 used for the next molding is placed on the carry-in stage 51 next to the carry-out stage 50. When the continuous molding is completed and the operator selects the mold member replacement mode on the operation panel of the rotary injection molding machine 11, the mold member moving mechanism 38 moves the mold of the other stationary platen 17 as shown in FIG. The rotary table 31 is positioned and stopped so as to face the member moving mechanism 24. Next, the movable platen 18 is advanced, and the rotating dies 33a and 33b are closed with respect to the fixed dies 16a and 16b. In this state, the connection between the temperature control pipes 59, 60 and the like connected to the rotary molds 33, 33b that have been molded and the connection pipes 56a, 56b of the operating mechanism of the mold member is removed. Similarly, the fixed molds 16a and 16b also remove the temperature control piping and the like.

Next, the clamping of the mold mounting plate 23 by the hydraulic clamp mechanism 27 of the fixed platen 17 is stopped. At the same time, the clamping of the mold mounting plate 34 by the hydraulic cylinder 65 of the hydraulic clamping mechanism 35 which is a clamping mechanism of the mold member on the movable platen side to which the rotary table 31 is mounted is stopped. Then, the movable platen 18 is moved to the mold opening side very slightly. As a result, a slight gap is formed between the mold member mounting surface 17a of the fixed platen 17 and the mold mounting plate 23, and a slight gap is also formed between the surface 31a of the rotary table 31 and the mold mounting plate 34. Is done. The procedure for removing the connecting member such as the temperature control hose and the procedure for releasing the clamp are not limited to those described above.

Next, the hydraulic cylinder of the mold member exchange carriage 49 is operated, and the molded mold member 15 is carried out to the carry-out stage. Further, the carry-in stage 51 of the mold member exchange carriage 49 is moved to a position facing the fixed platen 17 and the movable platen 18, and the mold member 15 to be attached to the molding machine next time is used as the mold clamping device 13 of the rotary injection molding machine 11. Move towards. At this time, the mold member 15 is carried from the non-operation side B through the upper and lower tie bars 20 and 20. The mold member 15 is placed on the rolling roller 25 of the mold member moving mechanism 24 provided on the stationary platen 17 and the mold member moving mechanism 38 provided on the rotary table 31 of the movable platen 18 from above the rolling roller of the carry-in stage 51. Is moved onto the rolling roller 39. At this time, the mold member 15 is moved in the horizontal direction and in a direction orthogonal to the mold opening / closing direction. The distance between the back surface of the mold mounting plate 34 of the mold member 15 and the front surface 31a of the rotary table 31 during this movement is such that the mounting surface 34b of the mold mounting plate 34 is mounted on the rolling roller 39. There is very little because there is.

When the front end of the mold mounting plate 34 of the mold member 15 passes through the position of the rotation center O of the rotary table 31 and is brought into contact with the stopper member 44, the air cylinder 36 is advanced, and the mold member 15 with respect to the rotary table 31 is moved forward. Are positioned in the horizontal direction. Next, the movable platen 18 and the rotary table 31 are slightly moved forward by the operation of the mold opening / closing mechanism 21, and the mold member mounting surface 17a of the fixed platen 17 and the mold mounting plate 23 are completely brought into close contact with each other. At the same time, the gap between the surface 31a of the rotary table 31 and the mold mounting plate 34 is completely eliminated and the two are brought into close contact with each other.

Next, a signal is sent from the control device (not shown) to the solenoids of the three-position switching valves 52a and 52d, the A port and the forward oil chamber of the hydraulic cylinder 65 of the hydraulic clamp mechanism 35 are connected, and the mold attachment of the mold member 15 is performed. The plate 34 is attached to the rotary table 31. At the same time or slightly before and after, the hydraulic clamp mechanism 27 is similarly operated to fix the mold mounting plate 23 of the mold member 15 to the stationary platen 17.

After completion of the mounting of the mold member 15 to the fixed platen 17 and the rotary table 31, the operator plugs 57 and 57 of the couplers of the connecting pipes 56a and 56b into the socket parts 63 and 63 of the couplers of the rotary molds 33a and 33b. Connected to. Then, hydraulic cylinders 54a for operating core parts 53a and 53b, which are mold members, from a hydraulic circuit 37 through supply pipes 46 and discharge pipes 47, three-position switching valves 52b and 52c, and connection pipes 56a and 56b, The hydraulic oil can be supplied to and discharged from 54b.

At the same time, the operator connects the plug portion of the coupler, which is the connection device of the temperature control pipes 59, 60 connected to the relay box 58, to the socket portions 63, 63 of the coupler, which is the connection tool of the rotary molds 33a, 33b. Is done. Alternatively, a pipe for supplying compressed air for the air cylinder 36, an electrical wiring for a hot runner, or the like is connected. At this time, the operator can attach the hydraulic oil connection pipes 56a, 56b, the temperature control pipes 59, 60, etc. to the mold member 15 (mold) from one side (operation side C), so workability is good. . In addition, since the fixed molds 16a and 16b are also attached from the operation side C with the hydraulic oil connection pipes 56a and 56b, the temperature control pipes 59 and 60, etc., the workability is good.

Next, the molding method of the rotary type injection molding machine 11 will be described including the operation by the three-position switching valves 52b and 52c of the core portions 53a and 53b which are mold members. When the mold member 15 is attached to the fixed table 17 of the mold clamping device 13 and the rotary table 31 of the movable platen 18 and molding is performed, the servo motor 29 is actuated by a command from a control device (not shown) and the rotary table 31 is moved to the first. Positioning is controlled and stopped at the molding position. At this time, the three-position switching valve 52c for controlling the rotary mold 33a is switched so that hydraulic oil can be supplied from the A port to the connecting pipe 56a, and the core portion 53a is moved forward by the forward movement of the hydraulic cylinder 54a. Yes. The three-position switching valve 52b for controlling the rotating mold 33b is switched so that hydraulic oil can be supplied from the B port to the connecting pipe 56b, and the core portion 53b is moved backward by the backward movement of the hydraulic cylinder 54b to perform primary molding of the cavity. The secondary cavity c2 is formed in a portion other than the product P1.

When the mold is closed and clamped, injection is performed from the injection device 14a to the primary molding cavity c1 formed by combining the fixed mold 16a and the rotary mold 33a. At the same time or before and after, injection is performed using another resin to the secondary cavity c2 formed by aligning the fixed mold 16b and the rotating mold 33b and retreating the core 53b from the injection device 14b. The The molten resin in each cavity is opened after cooling and solidification, and a molded product made of two materials is taken out from the rotary mold 33b by a take-out device (not shown).

Then, the servo motor 29 is driven, and the rotary table 31 and the rotary dies 33a and 33b are rotated by 180 ° and rotated to the second molding position. Then, the three-position switching valve 52b is switched, so that hydraulic oil can be supplied from the B port to the connecting pipe 56b, and the core portion 53a of the rotary mold 33b is retracted. Further, the three-position switching valve 52c is switched, so that hydraulic oil can be supplied from the A port to the connecting pipe 56a, and the core portion 53b of the rotary mold 33a is moved backward. When the mold is closed and clamped again, injection is performed from the injection apparatus 14a to the cavity c1 formed by combining the fixed mold 16a and the rotating mold 33b, and the injection apparatus 14b and the fixed mold 16b are injected. Injection is performed using another resin to the cavity c2 formed by matching the rotary mold 33a (cavity formed by retreating the core portion 53a).

Next, in the horizontal rotary injection molding machine 71 of another embodiment shown in FIG. 5, the same portions are denoted by the same reference numerals, and different points will be mainly described. The structure of the main part of the mold clamping device 13 of the horizontal rotary injection molding machine 71 is substantially the same as the example of FIGS. In the example of FIG. 4, the socket portion 73 of the autocoupler device 72 is fixed on the opposite side of the rotary table 31 from the side on which the mold member 15 is carried. The socket part 73 includes an on-off valve that is normally closed by a spring. The socket portion 73 is provided with a hydraulic cylinder 74 that opens and closes the on-off valve. And the temperature control hose is connected to the socket part 73 of the auto coupler apparatus 72 through the inside of the rotating shaft 32 and the inside of the rotary table 31 from the temperature control apparatus which is not illustrated.

A plurality of hydraulic oil control valves 75 such as a mold member operating mechanism are mounted on the outer circumferential side of the mold member mounting position 26 on the surface 31a of the rotary table 31 (here, on both sides of the socket portion 73). Yes. A supply pipe 46 and a discharge pipe 47 are connected to the control valve 75 from the hydraulic device 37. Two of the control valves 75 are directly connected to the hydraulic cylinder of the hydraulic clamp mechanism 35 via a connection pipe (not shown) without going through the auto coupler device 72. A pipe from another control valve 75 is connected to the hydraulic cylinder 74. Further, a hydraulic oil supply / discharge pipe from another control valve 75 to the operating mechanism of the mold member is connected to the socket portion 73.

On the other hand, when the mold mounting surface of the mold mounting plate 34 of the mold member 15 is carried in, a plug portion 76 of the autocoupler device 72 is fixed to the front end. The plug portion 76 is provided with an on-off valve that is normally closed by a spring and is brought into contact with the socket portion 73 so that the valve is opened by the operation of the hydraulic cylinder 74. The plug portion 76 has a relay box function, and temperature control hoses 77 and 77 on the supply side and the discharge side are fixedly connected between the plug portion 76 and the rotary molds 33a and 33b, respectively. Yes. Further, connecting pipes 78, 78, 78, 78 connected to a hydraulic cylinder for operating a core part, which is a mold member, are fixedly connected between the plug part 76 and the rotary molds 33a, 33b. Has been. Further, a connector may be provided in the socket part 73 and the plug part 76 so that wiring such as a hot runner may be connected.

The replacement of the mold member 15 of the horizontal rotary injection molding machine 71 according to another embodiment will be described. The front end portion or plug portion 76 of the die mounting plate 34 of the carried mold member 15 is brought into contact with a stopper member or socket portion 73 provided on the rotary table 31 and stopped. Next, when the hydraulic cylinder 74 of the socket part 73 is moved forward, the on-off valve of the socket part 73 on the molding machine side, the mold attachment plate 34 side, and the on-off valve of the plug part 76 are opened, respectively. The temperature control of the molds 33a and 33b and the operation of the core portions of the rotary molds 33a and 33b from the hydraulic device 37 can be performed without the operator's work. In the type shown in FIG. 5, it is desirable that the die member 15 to be replaced is attached to the die attachment plate 34 with the plug portion 76 of the auto coupler device 72. Note that a socket portion may be provided on the mold attachment plate 34 and a plug portion may be provided on the rotary table 31.

Further, in each of the above-described embodiments, the rotary table 31 of the rotary injection molding machine 11 is provided so as to be rotatable with respect to the movable platen 18 that is one of the plates. However, in the rotary type injection molding machine, one of the plates may be a fixed plate, and a rotary table that rotates about a horizontal axis with respect to the fixed plate may be attached.

DESCRIPTION OF SYMBOLS 11 Rotary type injection molding machine 15 Mold member 16a, 16b Fixed mold 17 Fixed board 18 Movable board 23, 34 Mold mounting plate 26 Mold member mounting position 27, 35 Hydraulic clamp mechanism 31 Rotary table 31a Surface 33a, 33b Rotary mold 52a, 52b, 52c, 52d Three-position switching valve 53a, 53b Core part B Non-operating side C Operating side

Claims (4)

The movable plate is horizontally opened and closed with respect to the fixed platen, and a rotary table to which the mold member is attached is provided so as to be rotatable with respect to the fixed plate or one of the movable platen. In a rotary injection molding machine where fluid is used for clamping
A rotary injection molding machine, wherein the fluid valve is provided radially outward from a mold member mounting position of a rotary table. The rotary injection molding machine according to claim 1, wherein the valve is provided on the surface of the rotary table that is opposite to the side on which the mold member is inserted when the mold member is replaced. The rotary injection molding machine according to claim 2, wherein a connecting device for supplying and discharging a temperature adjusting fluid to and from the mold member is provided on a side of the rotary table on which the valve is provided. The valve is connected to a connecting device for supplying and discharging the fluid to and from the mold member,
The rotary injection molding according to claim 2 or 3, wherein a connecting member on the side of the mold member connected to the connecting device is provided on a side of the mold member that is inserted when the mold member is replaced. Machine.

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