JPH0486225A - Automatic core changing system - Google Patents

Abstract

PURPOSE:To make not manual change but automatic change of core possible by a method wherein a core selecting means, a core changing means for conveying a pair of cores from and to the core installation positions of matrices to and from a core stocker, in which cores are stocked, respective locking means for fixing the core to the matrix and a controlling means for controlling said elements are provided. CONSTITUTION:When core change command is inputted to a controlling means after the selection of cores 17, under the condition that the cores 17 have been installed on matrices 14, a pair of the cores 17 installed on the matrices 14 are brought under the state being joined together and, after that, held with the holding part of a core changing means and released from the locking with locking means and, after the matrices 14 are opened by moving a movable platen 12, conveyed to a stocker so as to be stocked therein. Next, a core selecting means select the cores to be set to select. The resultant selected cores are held with the holding part of the core changing means and conveyed to the core installation positions of the matrices and, after being brought under the installation state to the respective matrices by moving the movable platen, locked to the matrices by actuating said locking means. Further, at the removal of the cores from the matrices, the joint faces of the cores are opened before the removal of cores so as to clean the joint faces of the cores with a cleaning device.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates primarily to an injection molding machine for injecting and molding molten synthetic resin material into a mold cavity.

A conventional injection molding machine basically includes an injection part and a mold clamping part, and a molding cavity is formed between a fixed mold and a movable mold attached to the mold clamping part, and the molding cavity is filled with melted material from the injection part. It has a structure in which resin etc. are injected. When looking at the mold clamping section, some are equipped with a mold exchange mechanism and a mold temperature control mechanism.

A mold change mechanism is necessary to easily replace heavy molds when the molded product is changed. However, if the product is small, it is more efficient to replace the core that forms the molding cavity than to replace the entire mold including the mold base. In this case, it is preferable that the temperature of the core be adjusted in advance to the temperature at which it will be used, since this will speed up the start-up of the work.

The mold temperature control mechanism is necessary to maintain the temperature of the mold at a level that is compatible with the characteristics of the resin being molded and to obtain uniform molded products. However, the temperature control liquid supply hose of the temperature control device is connected to the mold, which requires repeated attachment and detachment each time the mold is replaced. Furthermore, since the hose cannot be placed in a fixed position, the hose for supplying the temperature control liquid may become an obstacle during work.

Furthermore, after use, it is necessary to clean the cavity and joint surfaces of the mold before storing it. Conventionally, cleaning was done manually, and automatic conversion of the mold side (core ) and storage required manual intervention.

Problems to be Solved by the Invention The purpose of the present invention is to provide a method for automatically replacing cores without relying on human labor, and furthermore, it is an object of the present invention to provide a system for automatically replacing cores without relying on human labor. The purpose of the present invention is to provide a method for automatically cleaning the bonding surface and replacing the core, and an automatic core exchange method that can shorten the time until the start of molding operation when the core is automatically exchanged.

Means for Solving the Problems The present invention provides a core stocker for storing a plurality of cores of 1.1 and 17 by assembling a fixed side and a movable side, and a core selection means for selecting cores. , a core exchange means for taking out the pair of cores from the core stocker, transporting the cores to a mounting position on the mother mold, and transporting the cores from the mounting position to the core stocker and storing them; By providing each locking means for fixing each of the children to the corresponding respective mother mold, and the control means for controlling each of these elements, when attaching the core to the mother mold, the input to the control means is provided. Selecting a core by driving the core selection means, driving the core exchange means, transporting the selected core from the core stocker to a mounting position on the mother die, and moving the movable platen. The cores are attached to each mother mold, and the cores are automatically attached to the mother molds by locking a pair of cores to each mother mold using each locking means, and when the cores are removed from the mother mold. In this step, the pair of cores are held in a bonded state by the core holding portion of the core exchanger, the locking means is released, and the pair of cores are transported by the core exchanger and placed in the core stocker. It is now stored automatically. In addition, an automatic cleaning device is installed, and when removing the core from the mother mold, the movable platen is moved to open the joint surface of the core, and the nozzle of the automatic cleaning device is positioned between the separated core joint surfaces. The cleaning liquid was jetted out to clean the joint surface of the core, and then the core was taken out. Furthermore, in each core storage section of the core stocker,
It has a heater that heats the core and a temperature sensor that detects the temperature of the core housing, and the control means preheats the core by feedback controlling each core housing to a set temperature. This allows the core to quickly reach the set temperature suitable for starting molding operation when the core is replaced.

When a working core is selected and a core exchange command is input to the control means, the control means, if the core is mounted on the mother mold, brings the core mounted on the mother mold into a bonded state; The core is held by the holding part of the core exchange means, the lock by the lock means is released, the movable platen is moved to open the space between the mother molds, and the pair of held cores is transported to the core stocker and stored. , Next, the selected core is selected by the core selection means, the selected core is held and conveyed by the holding part of the core exchange means, and is conveyed to the mounting position on the mother mold, and the movable platen is moved. Then, the core is attached to each mother mold, and the locking means is activated to lock the core to the mother mold. Furthermore, when removing the core from the mother mold, the joint surface of the core is opened and the joint surface of the core is cleaned by a cleaning device before removing the core. Furthermore, the cores in the core stocker are maintained at a preset temperature so that when the cores are automatically replaced, the molding operation can be quickly started.

Embodiment [First Embodiment] FIG. 1 is a block diagram showing an entire eleventh embodiment of an injection molding machine according to the present invention. A mold temperature control mechanism 5, core exchange means 6,
Core protrusion 1. A device 7 and a mold cleaning device 8 are attached,
It is equipped with an NC device 9 that unifies and controls the entire operation.

The structure and process related to injection molding of the main body 4 are the same as those of the prior art, so a description thereof will be omitted.

[Mold temperature control mechanism]

The mold temperature control mechanism 5 (FIG. 2) includes a mold temperature control device 101, a temperature control liquid passage 13, a temperature control liquid passage 15, and both temperature control liquid passages 13.1.
It is composed of an automatic connection structure 1G between 5 and 5.

The temperature control liquid passage 13 includes a fixed platen 11 and a movable platen 1.
2 (13a, 13b...Hereinafter, the fixed platen side is referred to as a1, the movable platen side is referred to as b, and unless otherwise specified, both are meant), and the temperature control passage 15 is formed in the mother mold 1 of the mold. .4 (a, b) (1.5a, 1
5b). Accordingly, the automatic connection structure 16 described above has both platens 1.1. , 1.2 and temperature regulating liquid passages 13.15 formed between the respective master molds 14.

Reference numeral 17 is a core provided with a molding cavity, and the fixed side portion 1
．． 7a and the movable side portion 1.7b form a pair.

When the image portions 1-7a and 17b are fitted as a pair, they are in a close contact state that will not separate during normal carrying due to the fitting structure provided with pins and pin holes.

A tie bar 18 connects the fixed platen 11 and a rear platen (not shown), and is slidably attached to the movable platen 12.

The mold temperature control device 10 is a device that adjusts a temperature control liquid such as water or water to a predetermined temperature, supplies it to the temperature control liquid passage 1.3.15, and circulates it, and is activated at the same time as the injection molding machine 1 is started. be done.

The mold temperature control device 10 includes supply tubes 19.20 (respectively on the feed side I and return side r) and the temperature control liquid passages 1.3 (a) of the fixed platen 11 and the movable platen 12.

1]) connected with a coupler, sending side +9p, 20I)
A solenoid valve 21 controlled by the NC device 9 is installed in the path of
(a, b) are connected.

The electromagnetic valve 21 is a two-way switching valve, and switches between the passage to the platen (i i-+ 1.2) and the bypass passage q (from the sending side p to the returning side r) according to a command from the NC device 9.

Temperature regulating liquid passage 15 (
a, I)) is formed by connecting straight holes provided in the mother mold 14 in series with a tube 22 as shown in FIG. 3, and communicating the communicating holes from the front or rear surface of the mother mold J4.

The temperature regulating liquid passage 13 on the fixed platen 11 and movable platen 12 side and the temperature regulating liquid passage 15 on the mother die 14 side are connected by an automatic connection structure 16 shown in FIG. 4.

That is, one of the opposing ends of the temperature control liquid passages 1.3 and 1.5 (temperature control liquid passage on the platen side]-3) is formed into a port 23 with a large diameter or annularly circulating, and the periphery thereof It has a structure in which an O-ring 24 is attached around it.
The other end of the temperature regulating liquid passage (temperature regulating liquid passage 1.5 on the mother mold side), which has a smaller diameter than the boat 23, is pressed against this from the front and is coupled. In this case, the amount of protrusion of the O-ring 24 before the mother mold 14 is pressed is determined by the amount of protrusion of the O-ring 24 before the mother mold 14 is pressed against the mold (mother mold) placed between the fixed platen 11- and the movable platen 12 from above or from the side. 14 and core 17) and these platens 11, 1.2.

Reference numeral 25 denotes a mold clamp device, and a sensor 81 detects the clamp state and outputs the clamp state and release state.
etc., is transmitted to the NC device 9.

7] No. 26 is a tap that closes the unnecessary end of the straight hole provided in the mother mold 14.

[Operation of mold temperature control device]

When a mold (mother mold 14) is attached to each of the fixed platen 11 and the movable platen 12, and the mold clamping device 25 provided in the main body 4 is fully operated, the solenoid valve 21 (
When the operation commands for a and b) are released, these solenoid valves 21 are switched to the supply side by a command from the NC device 9, and the temperature control liquid is supplied from the mold temperature control device 10 to the fixed platen 11 through the supply tubes 19 and 20. , is supplied to the movable platen 12 and circulated through the mold matrix 14. This maintains the core 17 at the set temperature.

The solenoid valves 21 (a, b) are switched to the bypass passage q side when replacing the mother mold 14 to prevent wasted heat consumption and to prevent the temperature control liquid from spouting out when the mold is removed. It is designed to prevent

With this configuration, the mold temperature control hose is fixedly connected to the fixed platen and the movable platen, and is also automatically connected to the mold mother mold, so conventionally, the temperature control hose is connected to the fixed platen and the movable platen. The effort required for attaching and detaching is reduced. In addition, since the mold temperature control hose is fixedly connected to the platen, it remains in a fixed position, and there is no need to worry about the temperature control hose being in an unexpected position during work.

[Core exchange mechanism]

The core exchange mechanism 6 (FIGS. 5, 6, and 7) includes a core exchange device 27 and a core stocker 28.
8 is equipped with a core pre-temperature control function (described later).

The core exchange device 27 includes a rotary arm 30 (FIG. 6), a servo motor M1 that drives it, and an extrusion actuator 31-.
1 return actuator 32.

The rotary arm 30 has a tip formed in a core holding ring 33, and a base supported by one tie bar 18 so as to be rotatable at a fixed position around the tie bar 18. The rotary arm 30 is pivotally supported by an upper tie bar 18, and the fixed platen 1
This is a location close to 1-.

The core retaining ring 33 has a hole having an inner diameter approximately equal to the outer diameter of the core 17 passing through it in the front-rear direction, and the rear surface of the fixed platen 11 (
(with the side of the injection section 2 being the front).

The inner surface of the hole is coated with a soft metal such as brass to protect the core.

A gear G1 is fixed to the base of the rotating arm 30, and a gear G2 of the servo motor M1 attached to the top of the fixed platen 11 meshes with the gear G1. The operation of servo motor M1 is controlled by NC device 9.

The extrusion actuator 31 and return actuator 32 are air actuators operated by a solenoid valve 34.35, and the solenoid valve 34.35 is operated by the above-mentioned actuator 31.3.
This is a two-way switching valve that switches between air supply and air extraction for air 2, and is switched by a command from the NC device 9. The pistons of the actuators 31 and 32 are each equipped with an internal spring, and are extended a predetermined stroke by air supply, and quickly retracted by the internal springs by exhaust air to return to the home position.

As shown in the figure, the core stocker 28 has a disc shape with a plurality of storage holes 36 (through holes) that can store a plurality of cores 17 along the circumference, and a stay attached from the fixed platen 11 is inserted into the core stocker 28 . 37, and is rotatably supported by a shaft 38 extending in the front-rear direction. The core stocker 28 is placed on the rear surface or on the mother mold 14.
The core attachment in a is arranged forward of the bottom surface of the groove 39 (FIG. 5).

A gear G3 is fixed to the outer periphery of the core I/lunch 28, and a gear G of a servo motor M2 attached to the top of the stay 37 meshes with this gear.

The operation of servo motor M2 is controlled by NC device 9.

In the core stocker 28, as shown in FIG. 8, a heater 40 and a thermocouple 41 are arranged in each storage hole 3 for storing the core 17, and each is connected to a temperature converter 72 (described later).

Note that the heater 40 is a sheathed heater sealed in a metal cylinder, and a heat insulating layer 43 is formed between the heater 40 and the casing 42 of the stocker 28, so that there is no space between the heater 40 and the other storage hole 36. Mutual interference of the generated heat is prevented as much as possible.

If the core stocker 28 is provided with a pre-temperature control function, it will be easier to start up the molding operation after replacing the core, resulting in improved efficiency.

The above-described extrusion actuator 31 and return actuator 32 operate at predetermined positions relative to the core stocker 28, that is, when the stocker 28 rotates, the cores 1 stored therein are moved.
7 can be placed between both actuators 31, 32, and the core stocker 28 can be placed in a certain position that can be reached by the core retaining ring 33 of the rotary arm 30.
They are placed facing each other in the front and back with the two sides in between (Figure 5).

The arrangement of the extrusion actuator 31 and the amount of protrusion of its piston are based on the core 17 (a and b are fitted together and integrated) stored in the storage hole 36 of the core stocker 28.
The amount that can be passed to the core holding ring 33 by protruding from the front to the rear, and the arrangement of the return actuator 32 and the protrusion 1-old of its piston is the amount that can be passed to the core holding ring 33 by protruding from the front to the rear. This is the amount that allows the core 17 to be pushed back into the storage hole 36 of the stop 728 and released from the core retaining link 33.

Therefore, the core retaining ring 33 is located between the return actuator 32 and the rear surface of the stocker 28 and
It is arranged to rotate along the rear surface of the

Note that the width (thickness) of the core holding ring 33 in the front-rear direction is made slightly smaller than the distance when the mother molds 14a and 1.4b are closest to each other in the clamped state.

Reference numeral S2 is a photoelectric sensor that detects whether or not a core 17 is present in the gap between the core holding ring 33 and the core stocker 28 at the transfer position, and is turned on when the core 17 is not present. Further, reference numeral S3 denotes a magnetic sensor, which is placed in the slot 1-1 of each core storage hole 36 and detects whether or not a core 17 exists in the storage hole 36, and this sensor is turned on when the core 17 is present. becomes.

Here, on the rear surface side of the matrix 14a, FIG. 9 and FIG.
As shown in Fig. 7, the groove 39 is connected to the rotary arm of the core exchange mechanism 6, and the groove 39 extends from the top surface to the position of the sprue bush 44 in the center of the mother mold 1-4R. 3
0, and a stopper 45 is arranged near the sprue bushing 44 of the groove 39 for attaching the core.

For this core installation, the groove 39 has a dovetail-shaped cross section that is wide at the entrance side, and at the end, the core 1 is centered around the sprue bush 44.
The groove has dimensions that exactly match the outer shape of the core 1-7, so that there is no play in the core 1-7 attached to the end.

Further, the stopper 45 is disposed from the front side of the mother die 1.4 a to the rear side, penetrating the mother die, and is driven by an air actuator 46 . This air actuator 46 includes a solenoid valve 47 that is operated by a command from the NC device 9. The electromagnetic valve 47 is a two-way switching valve that switches between an air supply side and an air exhaust side for the actuator 46 .

On the other hand, in the center of the movable mother die], 4b, there is a core mounting hole 48 which is tapered slightly narrower on the peripheral surface or inside, corresponding to the end of the groove 39, for the core mounting. (Figure 5)
or is formed.

Furthermore, the core 17 has a cylindrical structure as a whole, and a molding cavity (for a lens) is formed at the joint surface of the fixed side part 17a and the movable side part 17b.

The fixed side part 1.7a of the core 17 has a matrix], 4a
A resin flow path (runner) is formed that connects to the sprue bushing 44 attached to the sprue bushing, and has an annular groove 49 on the outer periphery and a cross section that matches the dovetail groove.

The movable side portion 17b of the core 17 has a hole 51 (first
(Fig. 0) is formed, and an eject pin 52, which is thinner than the diameter of the -1- hole 51, is disposed on the distal end side of the eject pin 52 so as to be slidable in the front-rear direction. A return spring 53 is arranged in the hole 51 to urge the eject pin 52 rearward.

[core ejection device]

The core ejecting device 7 (FIGS. 6 and 10) is installed at the center of the rear surface of the movable platen 12 and connects the eject rod 50 and It consists of a solenoid 54 arranged on both sides of a motor shaft 55, and the rod 50 penetrates from the rear surface of the movable platen 12 into the core mounting hole 48 of the mother mold 4b, and the movable side portion 1.7 of the core 17. b is arranged so as to be able to freely slide into a hole 56 connected to the hole 51 when it is attached.

The through-type servo motor M3 has a structure in which the motor shaft 55 is a pole screw that is allowed to slide only in the axial direction, and is equipped with a pole nut inside that rotates together with the rotor.
Controlled by device 9.

Therefore, when driven, the motor shaft 55 is directly moved back and forth in the axial direction.

The eject rod 50 is protruded forward and pushes only the eject pin 52 to perform a first stage operation without ejecting the product, and a second stage operation in which the eject rod 50 moves further forward and projects the movable side portion 17b of the core forward. It looks like this.

Further, the plunger 54' of the solenoid 54 is actuated in a short period of time, and serves as a kind of electromagnetic hammer that abuts against the core 1-7b.

Note that the penetrating servo motor M can be replaced with a two-film actuator or the like.

[Mold cleaning equipment]

The mold cleaning device 8 (Fig. 11, Figs. 6 and 7) is equipped with a solenoid valve 5.
7 and an electromagnetic valve 59, and an air actuator 60 that attaches the nozzle 58 to the tip of a piston and moves it up and down.

The solenoid valve 57 is an on-off valve, and the solenoid valve 59 is a two-way switching valve that switches air supply and exhaust, both of which are operated by NC.
Controlled by device 9.

The air actuator 60 includes a piston with a constant stroke that can move the nozzle 58 from a home position at one end of -1 to a lower core mounting position, and a sensor S, 1 that outputs a detection signal when the piston is fully extended. This actuator 60 is equipped with a spring inside, and can quickly retract the piston in the exhaust state to place the nozzle 58 in the upper home position.It is mounted on a stand 61 that can adjust the angle in three axes (vertical, horizontal, and vertical). I'm being kicked out. This stand 61 is fixed to the top surface of the fixed platen 11, and by manually adjusting the angle of each axis, the attitude of the air actuator 60, that is, the direction in which the nozzle 58 is moved, can be arbitrarily determined. .

Cleaning liquid is supplied to the nozzle 58 through a hose 62.

[Control Device] FIG. 12 is a block diagram of the configuration of a control section for controlling the temperature of each core 17 of the heating cylinder and core stocker 28.

In FIG. 12, 70 is a screw, 71 is a heating cylinder, the heating cylinder 71 is divided into a plurality of heating zones, each heating zone is equipped with band heaters B1 to B3, and each band heater B1 to B3 is It is connected to a power source 73 via switches SWI to SW3 to heat the heating cylinder 71. In addition, a thermocouple '7 is installed in each heating zone.
4-1 to 74-3 are arranged to detect the temperature of each heating zone, and the output of each thermocouple 711 to 74-3 is manually input to the temperature converter 72. Further, each thermocouple 41 disposed adjacent to each storage hole 36 of the core stocker 28 is connected to the temperature converter 72.
2 converts the temperature detected by each thermocouple 41 and 74-1 to 74-3 into a digital signal according to the selection signal output from the output circuit of the NC device 9, and sends it to the input circuit of the NC device 9. It is outputting.

Further, each heater 40 disposed adjacent to each storage hole 36 of the core stocker 28 is connected to a power source 73 via switches SW4 to SW5WIO, respectively.

Each of the switches SWI to 5WiO is further connected to an output circuit of the NC device 9, and is controlled on/off by a signal outputted via the output circuit.

In this embodiment, the output of the thermocouple 74-1 of the nozzle portion of the heating cylinder 71 is input to the terminal 1 of the temperature converter 72, and the output of the thermocouple 74-2 of the heating zone of the band heater B2 is input to the terminal 2. , thermocouple 74- of the heating zone of band heater B3
3 is input to terminal 3, and the output of temperature converter 72 is input to terminal 4.
-1o are connected to corresponding thermal lightning pairs 41 provided for each storage hole 36 of the core stocker 28. That is, in FIG. 13, FC1 to FC7 are codes set for each storage hole 36, and the codes FC1 to FC
The thermocouples 41 in the storage holes corresponding to 7 are each connected to a temperature converter 72.
are connected correspondingly to terminals 4 to 10 of. Further, the switches 5Wi-3WiO also have thermocouples 74-1 to 74-3. They are provided corresponding to the thermocouples corresponding to the storage hole codes FC1 to FC7, respectively.

FIG. 13 is a block diagram of the NC device 9 as a control device.

The NC device 9 is a microprocessor for NC (hereinafter referred to as CP).
It has a CPU 102 for a programmable machine controller (hereinafter referred to as PMC), and a CPU 102 for a programmable machine controller (hereinafter referred to as PMC). A RAM 108 used for temporary storage of data is connected.

NC CPU 10 ] includes a ROM 107 that stores a management program for controlling the injection molding machine as a whole, and a rotary arm 30 for driving injection, mold clamping, screw rotation, and core replacement, and a core stocker. A servo circuit 1-05 is connected via a servo interface 104 to drive and control 28 servo motors for each axis, such as for driving and ejector. In addition, 11-0 is a bubble memory or CMOS
A nonvolatile shared RAM consisting of memory, which has a memory section that stores NC programs that control each operation of the injection molding machine, and a setting memory section that stores various setting values, parameters, and macro variables. .

Reference numeral 103 denotes a path arbiter controller (hereinafter referred to as BAC), and the BAC1-03 includes a cpU10 for NC.
1 and PMC CPU1.02. Shared RAM 110, input circuit 1-11. , and output circuit 112 are connected to each other, and the BAC 103 controls the buses to be used. Further, reference numeral 114 indicates a CRT display device child dynamic data input device (hereinafter referred to as C
RT/MDI), and various commands and setting data can be input by operating various operation keys such as soft keys and numeric keys. In addition, 10
A RAM 6 is connected to the NC CPU 21 by bus and is used for temporary storage of data.

The output circuit 112 includes the electromagnetic valves 21. of the various actuators described above. a, 2], b, 34, 35, 47°57, 5
9. Heater switches SWI to 5WI provided for the electromagnetic solenoid 54, the mold temperature controller 10, each band heater of the heating cylinder, and each storage hole 36 of the core stocker 28
O, temperature converter 72° is connected to the servo circuit 105 of the servo motor of each axis.

The input circuit 111 also includes various sensors St.

S2. S3. S4. Mold temperature control device 10. It is connected to a temperature converter 72.

In addition, each servo circuit 105 is connected to the servo motor of each axis, and is also connected to a position detector such as a valve coder that detects the rotational position of the servo motor provided in each servo motor, and the speed of each servo motor. , to control the position.

In the above configuration, the NC device 9 has a shared RAM
], ], The PM ( J-1]CP
While U109 performs sequence control, the NC CPU
IO1 distributes pulses to the servo circuits of each axis of the injection molding machine via the servo interface 104 to control the injection molding machine.

Injection molding operation, namely W-1-I! , mold clamping, injection.

Operation processing controls such as holding pressure, cooling, direction opening, ejecting, etc. are performed in the same manner as in the prior art, and a description of the operations will be omitted. The pre-temperature control of the core and the automatic core exchange operation, which are the features of the present invention, will be explained below.

[Creating core temperature control] FIG. 14 is an explanatory diagram of a table that stores the preliminary set temperature that is set when the core 17 is stored in the core stocker 28. Such a table TI) is stored in the shared RAMll0. It is provided.

When storing each core 17 in the storage hole 36, the CRT/MD
I] Operate 14 to switch the CR-T screen to the core preliminary temperature setting screen, and as shown in Fig. 14, store the cores in the respective storage holes in correspondence with the storage hole numbers (codes) FCI to FC7. Name of core (core code) 17-1~17
=7, and the preheating temperature T for the core.
1-Set Go7. Furthermore, the on/off control cycles t1 to t7 of each heater 40 are also set. Note that the on/off control periods may all be the same, and in this case, they may be fixedly set in advance so that there is no need to set them when storing the core. In addition, in FIG. 14, the rotational position Q1
-~Q7 is the rotational position of each storage hole 36, that is, the rotational position of the servo motor M2 that drives the core stocker 28, and by positioning the core stocker 28 at these rotational positions Q1 to Q7, each storage hole F C1 ~FC7 can be positioned at the core removal position. Since this position is fixed, there is no need to set it, and the setting is input when the injection molding machine is manufactured, and this position is not displayed on the CR7 screen.

The cores 17 stored in each storage hole 36 in this way
Codes 17-1 to 1-7-7 and preheating temperatures T1 to T
7, and further sets the on/off control cycles t1 to t7 to control the shared RAM 1.1. When stored in O, CP for PMC
U i O2 performs preliminary temperature control of each core 17 based on the preliminary heating temperatures T4 to T7 stored in this one table T. In addition, as in the past, if various molding conditions are set and the set temperature of each heating zone of the heating cylinder 71 and the set temperature of the mold are set and stored in the shared RAM 1.10, I)
The MC CPU 102 sends the mold setting temperature to the mold temperature controller 10 via the output circuit 11-2 as in the conventional case.
The mold temperature control device 10 automatically controls the temperature of the heat exchange medium circulating inside the mold and the core so as to reach this set temperature.

Moreover, CP U 1.02 for PMC is shown in FIG. 15(a).

The temperature control shown in the flowchart in (I) is repeatedly executed at predetermined intervals. Note that this temperature control processing cycle is sufficiently shorter than the on/off cycle for controlling the on/off of the band heaters B1 to B3 of the heating zone and the heaters 40 of each storage hole 36.

The PMC CPU 102 first sets the index j to 1 (step 5100), and sets the flags F2-1 to F2-10. which are provided for each heating zone. Fl-1 to Fi-10
Among them, the flag F2i, F] corresponding to the index I, i is 1
Determine whether it is set to (step S), 0
1. , 5i02). Note that these flags F1-1 to Fi
-10, F21 to F2-1-0 are set to 0 by default. If flags F2j and Fli are not 1,
The PMC CPU 1.02 switches the temperature converter 72 via the BAC 103 and the output circuit 112, and outputs the detected temperature from the thermocouple input to the terminal i of the temperature converter 72 indicated by index i to the input circuit 111. and read the detected temperature Tai from this thermocouple (step S
i, 03). Next, the heater corresponding to terminal i (1 is 1 to
If i is 3, it is the band heater B1--B3, and if i is 4-10, it is the heater 39 corresponding to the storage hole code FC1-FC7.
) is set to the register EO.
Set temperature TSi of the heating zone or storage hole for the terminal stored and set in i (if i is 1 to 3,
The set temperature set for the heating cylinder 71, i
If it is 4 to 10, the detected temperature Tai read in step 5103 is subtracted from the set temperature T1 to T7 set for the storage hole code F C1 to FC7 to obtain the temperature deviation and stored in the register E1i. (Step S) 0
4°5405). Then, the temperature deviation value stored in the register Eli is added to the register ESi that stores the integrated value of the temperature deviation (step 5i06). Next, the on-time IO■1 is calculated by performing the calculation shown in the following first equation (step 5107゜ton -K) ・2 for El i+ ・
Esi ten K 3. (Ell-I No. Oi) ... (1-) In the first equation, K1. , to 2. 3 is proportional, integral, and differential gain in temperature control, Eli.

ESi and EOi mean the values of the respective registers, that is, the currently detected temperature deviation, the integrated value of the temperature deviation, and the previously detected temperature deviation.

The on time obtained in this way (0 ■ 1 is the corresponding terminal (i)
Temperature control cycle (on/off cycle) set for the heating zone or storage hole 36 corresponding to tpi (if i is 1 to 3, the temperature control cycle stored in the work memory for the heating zone If 1 is 4 to 10, the temperature control cycles t1 to t7 set in the table Tb correspond, respectively.

), and only when it is larger, change the on time to this temperature control cycle (on/off cycle) tpi (
Step S], 08, 5i09). That is, the entire period of the temperature control cycle (on/off cycle) is set as the on time. Next, the on time ton is subtracted from the temperature control period (on/off period) tpi to obtain the off time t.

Find ff (step 5110), and set timer T11°T2.
An on time ton and an off time toff are respectively set for i (steps Si1.], 5ill). And timer T
li to star I, turn on the switch SWi via the BAC 103 and the output circuit 112, activate the band heater B of the heating zone corresponding to the index i or the heater 40 of the storage hole 36, and set the flag Fli to 1. Set (Step S], i3, 31.1-4, 5115). Next, it is determined whether or not the timer T11 has timed up (step 81.16). Since the timer has not timed up at the beginning, the process moves to step 5122, where the index i is incremented by 1, and the index i is used to control the heating zone and storage hole. It is determined whether the number is less than 10 (step 3123), and if it is less than 10, the process returns to step 5101 and repeats the processing from step 8101 onwards.

Immediately after the start of operation, flag l" 2-1~F 2-1-
Since OF 1-1- to F 1-1.0 are initially set to 0, step S 1.0. is performed until index i exceeds 10.
1-S], i6. The processing of Si12, 5123 is repeatedly performed, and each band heater B1 to B3 and each storage hole 3
The heater 39 for 6 heats the calculated on-time heating cylinder and the core 17 in the storage hole 3G.

In this way, each band heater B1-133. Each heater 4
0 is started, and when the index i exceeds the number of band heaters and storage holes, which is 10, the processing of the processing cycle ends.

In the next processing cycle, each flag F1. Since -1 to F110 are set to 1, step 5i00. S
Process iOF, step 81.02 to step 8
Step 116 determines whether or not timer Tli has timed up, and if it has not timed up, step 5122
, the index i is incremented by 1, and if the index i is less than or equal to 10, the process returns to step 101 and the index i becomes 10.
step 3l-OF-,S], 02. S:
1. ]-6°5i22. Si, repeat the process of 23,
The processing of the corresponding processing cycle is ended.

After the next processing cycle, the process described in -1- is repeated, but
When it is detected in step 5116 that timer Tli has timed up, BAC], 03. Output circuit 11
2, turn off the switch SWi corresponding to the index i (step S], 1-7), set the flag Fli to 0,
is set to 1 (step S119), and the timer T2i is started to start measuring the off time t, off set in step 5112.Step 5119), and it is determined whether or not the timer T2i has timed out. (step 5120), if the time has not expired, proceed to step 5122, increment the index i by 1, and if the index i does not exceed 40, proceed to step 5122.
The process returns to step 101 and the above-described process is repeated.

In this way, when the timer Tri times up and the on time has elapsed, the switch is turned off and measurement of the off time is started.

Then, from the next cycle, if the flag F2i is 1 and measurement of the off time has started, the process moves from step 5101 to step 5120, where it is determined whether or not timer T2I has timed up, and whether or not the timer T2I has timed up is determined. The process moves from step 5102 to step 8116, and the above-described process is repeated.

Further, when it is detected in step 5120 that the timer T2i has timed up, the flag F2i is set to 0. When the flag F21°Fli becomes 0 in this way, the processes from step 8103 described above will be executed in the next processing cycle.

The PMC CPU i 02 repeats the above-mentioned processing every processing cycle, turns on/off each switch SWI to SWi, O, and turns each band heater B1-133. Each heating zone or core 17 is heated by each heater 40, and PID (proportional-integral, differential) control is performed so that each heater reaches a set temperature.

Also, when setting temperature conditions for injection molding or monitoring temperature, if you switch the CRT device to the temperature condition setting and monitoring screen, 1) CPU for MC
O2 is the set mold temperature that has already been set and stored in the shared RAM 110, the set temperature of each heating zone, readout, CR7
In addition to displaying the temperature on the screen, the terminals of the temperature converter 72 (the thermocouple of each heating zone or the thermocouple 41 corresponding to the storage hole 36) are sequentially designated via the output circuit 112, and the temperature detected by each thermocouple is displayed on the CR7. Display on screen. Therefore, the current value of the mold temperature, the current temperature of each heating zone, and the current temperature of each core 17 in the core stocker 28 can also be monitored at the same time.

In the above embodiment, the temperature control of the heating cylinder 71 and the temperature control of the cores of the core stocker 28 are controlled at the same time, but the preliminary temperature control of the core stocker 28 is performed with high accuracy like that of the heating cylinder. Since there are cases where temperature control is not necessary, the pre-temperature control of the core 17 of the core holder 28 may be carried out at a different cycle from the temperature control of the heating cylinder. good. The control in this case is shown in Figure 16 (a
).

This is similar to the control processing in (b), except that the processing cycle is longer.

[Core exchange control] Figures 16 (a), (b), (c), and (d) show how the core exchange mechanism 6 (see Figures 5, 6, and 7) is used. When a child exchange command is input, the C for PMC
It is a flowchart of the process performed by r'U'102.

Set various molding conditions such as mold temperature, temperature of each heating zone of the heating cylinder, mold clamping force, injection speed, holding pressure, weighing value, etc., input the code of the core to be used, and input the core replacement command. ,
CPU 1.02 for PMC is No. 6 (a),
The processes shown in the flowcharts in (b), (c), and (d) are started.

First, from the rotational position of the servo motor M1-, the rotary arm 30
The rotation position of is the position of the mother die 14 a.
It is determined whether the center position is PI (the position when performing the molding operation) (step 5200). The rotational position of each servo motor is determined by the servo circuit 105 for each axis. The NC CPU 1-01 reads and stores data in the shared RAM 110 via the servo interface 104, and the PMC CPU
U1.02 reads the rotational position of the servo motor M10 from the shared RAM110, judges whether this position is the position P1 where the core 17 is attached to the mother mold, and determines that the position of the rotating arm 30 is this position P1. , means that the core is attached to the mother die 14, so in order to clean the core 17a17b, the NC is sent via the shared RAM 1.10 so that the movable platen 12 is positioned at the set position P3.
CPU], 01. CP TJ for NC
1.01 distributes pulses to the mold clamping servo motor MO, moves the movable platen 1-2, and moves the movable platen 12 to the commanded position by the signal from the position detector attached to the mold clamping servo motor MO. When the in-position width for P3 is reached, the positioning completion signal is sent to the NC PC.
U101- is a shared RAM for PMC CPU U i 02
110 (step S201).

I) Movement commands issued from the MCJ1JCPUi02 to the servo motors of each axis are stored in the shared RAM 110 as described above.
The drive control of the servo motor for each axis is performed via NC.
Controlled by CPU 1.01. In the following, in driving the servo motor, the exchange of signals between the PMC CPU]02 and the NC CI'U], 01, and the NC CPU
The drive control of the servo motor of Ul0I is the same as the conventional one, so the explanation will be omitted.

When the positioning completion signal is output from the NC CPU 1.01, the PMC CPU 1.02 turns on the solenoid valve 57 via the output circuit 112 (step 5202), and turns on the air actuator 60 of the mold cleaning device 8. is activated to move the nozzle 58 to the center position of the core. Then, it is determined whether the sensor S4 is turned on or not (step 5203).
When the sensor S4 is turned on and the nozzle 58 reaches the center position of the cores 1-7a and 17b as shown in FIG. The cleaning liquid is ejected in both the front and back directions from the cores 17a, 1.
Wash 7b. Then, start timer A1,
When the set time elapses and the timer A1 times up (steps 5205 and 5206), the solenoid valve 59 is turned off to stop the jetting of the cleaning liquid, and the solenoid valve 57 is turned off and the nozzle 58 is raised to return to the home position. (Steps 5207, 8208).

Next, a command to move the movable platen to a position P4, which is a slight amount δ before the position touched by the cores 1.7a and 17b, is issued, and the NC CI) U, 1.01 moves the movable platen 1-2. When a movement completion signal is sent (step 209), a step 521 is issued to the servo motor M3 that drives the eject rod 50 to move it to a position just before the cores 7a and 17b touch. -0
), the electromagnetic solenoid 54 is activated for a short period of time to remove the core 1 fitted into the mother mold on the movable platen 12 side], 4 b
71) to release the fitting between the core]-7b and the matrix 1-4b (step 5211), and timer A
2 (step 821.2) and timer A
2 has counted the set time and has timed up. Also, the eject motor M3 has been operated, the eject rod 50 has reached the commanded position, the movement has been completed, the in-position width has been reached, and the movement has been completed. Completion signal is CP for NC
Step S to determine if it was sent from U 1.01
213. (214), if the timer A2 times up before the movement completion signal is sent, it is assumed that the core 17b and the matrix 14b have not been disengaged, and the process returns to step 5.
Returning to step 211, the solenoid 54 applies impact force to the core 17b again. Thereafter, the steps 8211 to 214 are repeated until the movement completion signal is detected. When the movement completion signal is sent, the core 17 b and the matrix 14 b
This means that the fitting with the eject rod 50 is released, so a torque limit value is outputted via the output circuit 112 to the servo circuit of the servo motor M3 that drives the eject rod 50,
A command to move the core 17b to a position P6 where the core 17b is completely removed from the core mounting hole 48 of the mother mold 14b is output, and the servo motor M3 is driven while limiting its output torque (step S
2], 5). At the same time, the mold clamping servo motor MO moves the movable platen 1-2 to the core exchange position P7 at a speed that is slightly slower than the moving speed of the core], 7b. A command is issued to move the movable platen 12 backward and perform a mold opening operation (step 5216). The moving speed of the core 17b is faster than the moving speed of the movable platen 12, and the output torque of the servo motor M3 that drives the core 17b is limited, so the core 17b is moved at Il,
7 a is pressed and held in close contact with it. and,
When the eject rod 50 moves to the set position P6 by driving the servo motor M3 and a movement completion signal is sent (step 321.7), the eject rod 5 moves to the set position P6.
0 to the home position ff1P8, and the solenoid valve 47 is turned off to release the air cylinder 46 from locking the core 1.7a to the mother die 14a (step S21.8, 5219). In addition, eject rod 5
Even if 0 no longer presses the core 1.7)), the core 17
Cores 17a and 17 are connected by guide pins between a and 1.7b.
b are kept in close contact with each other, and the cores 1.7a and 17b are held in the matrix 14a on the fixed platen 11 side.

Next, it is determined whether or not the movable platen 12 has moved to position P7 and a movement completion signal has been issued (step 5220). When the completion signal has been issued, the servo motor M1 is driven to move the rotary arm 30 to the core slider I. It is moved to the position P2 (the position shown in FIG. 7) corresponding to the storage hole 36 of the claw 28. Since the core stocker 28 is not rotated after taking out the core 17, when the rotary arm 30 is positioned at position P2, the center position of the core holding ring 33 of this rotary arm 30 is such that the core 17 is not rotated. This matches the center position of the storage hole 36 taken out. Then, when the movement completion signal is issued, the solenoid valve 35
is turned on and the actuator 32 is operated (step S22], 5222).

Then, it is determined whether the photoelectric sensor S2 is on and the magnetic sensor S3 is on. If the photoelectric sensor S2 is on, it means that the core 17 is not detected, and if the magnetic sensor S3 is on, it means that the core 17 is not detected in the core stocker 28.
(Steps 5223, 5224). Then, when the photoelectric sensor S2 turns on and the magnetic sensor S3 turns on, it means that the middle T1.7 is completely stored in the storage hole 36, so the solenoid valve 35 is turned off and the actuator 32 is reset. let me,
(Step S225) The position of the core storage hole of the core code set as the core to be used is read from the table Tb, and the servo motor M2 is driven to position the core stocker 28 at the corresponding position (Step S225). S226
). When the movement destination r signal is output from the NC CPU 101, the solenoid valve 34 is driven and the extrusion actuator 31
is driven to insert the selected core into the core holding ring 33 (step S227). While the core is moving from the storage hole 3G to the core holding ring 33, the photoelectric sensor S2 detects the core and is off, and the magnetic sensor S3 detects that the core-17 is moving from the core storage hole 3 to the core holding ring 33.
It remains on as long as even a portion remains in 6.

The core 17 moves to the core holding link 33, and the photoelectric sensor S
2 is turned on and does not detect the core, and the magnetic sensor S
3 is turned off and it is detected that it is not in the core storage hole 36 (steps 3228 to 5229), the solenoid valve 34 is turned off and the extrusion actuator 31 is returned to its original position (step S230). Next, the servo motor M1 is turned off. drive the
The rotary arm 30 is positioned at position P1 for attaching the core to the mother die 14a (step 5231), and when a movement completion signal is issued, the solenoid valve 47 is turned on and the core 17 is air-filled as shown in FIG. The cylinder 46 is locked to the master die 14a (step 8232). Then, the movable platen] 2 is moved to the set mold clamping force position by driving the servo motor MO (step 233), and when a movement completion signal is issued, the movable platen 12 is moved to the mold clamping force position. As a result, the core], 7b is fitted into the core mounting hole 48.

In this way, the core 17 a is attached to the matrix 14 on the fixed platen 11 side.
a, and the core 1-7b is fixed to the mother die 1.4b on the movable platen side. Next, the movable platen 12 is moved to position P9 and the mold is opened (step S234), thereby completing the core exchange process.

Further, when a core replacement command (core mounting command) is input while the core 17 is not mounted on the mother die 14, the PMC CPU 102 changes the position of the rotating arm 30 to the mounting position in step 5200. is not the position P], the process moves from step 5200 to step 8226, and the steps from step 8226 described above are performed.

Furthermore, if the command is not to replace the core but simply to remove the core from the matrix, the processing from step 5200 to step 5225 is performed, and the flowchart of the processing for this command only for removal is as described above. Since the processing is the same as that from step 5200 to step 5225, the description thereof will be omitted.

To A [Second Example] No.? In this embodiment, the fixed platen 11 and the movable platen 12 are attached to the mold base 1.
4 itself, and the core 17 is directly attached to the platen 11.
↑2nd chair] The difference is that it can be kicked.

The other configuration is the same as that of the first embodiment, and the matrix 1.4a in the description of the first embodiment is replaced with a fixed platen 11-, and the matrix 14b is replaced with a movable platen 12. be able to.

[Third Embodiment] FIG. 18 shows a third embodiment focusing on the mold temperature control mechanism 5. The structure of the mold clamping section 3 includes a fixed platen 11-1, a movable platen 12, and a mold mother mold. 14 itself, which belongs to the type of the second embodiment.

Therefore, the temperature regulating liquid passages 13 of the fixed platen 11 and the movable platen 12 have the same structure as the temperature regulating liquid passages 1-5 in the mother mold 14 of the above embodiment, and the mold temperature regulating mechanism 5 is substantially has a platen temperature control mechanism.

However, in this embodiment, the core 17 (a, b) is also provided with temperature regulating liquid passages 63 (a, b), which are connected in series with the temperature regulating liquid passages]-3 (a, l)) on the platen side. It is connected. Also, the core 17 and each platen 11, . The temperature control liquid passages 13.63 in 12 are connected by the same automatic connection structure 16 as described above. However, in this case, as will be described later, since the core 17 is attached to the platens 11 and 12 by sliding from above, the amount of protrusion of the O-ring 24 provided on the port 23 side is smaller, and the surface is smoother. It's a good one.

There is no particular difference in the operation of the mold temperature control mechanism 5, as long as the electromagnetic valves 21 (a, b) are operated in advance to stop the supply of temperature control liquid when replacing the core.

Other configurations can be configured similarly to the first embodiment.

In this embodiment, platen 11. ．． Although the injection work is carried out by attaching a mold consisting of a core 17 and a matrix 14 to 12,
Since the molded product is small, it is sufficient to replace the mold itself by replacing the core 17 with the molding cavity, and the mother mold 14
This corresponds to the case where platen 11-9 is rarely replaced.
It is based on the technical idea that it is more rational to configure 12 itself into a matrix.

Further, by providing the temperature regulating liquid passage 63 in the core 17 and directly regulating the core temperature, responsiveness regarding temperature regulation can be improved.

In addition, in this embodiment, the temperature control liquid passage 6 of the core 1-7
When it is necessary to accurately position the core 17 with the boat 23 of the temperature control liquid passage 13 on the platen side, the cross section of the core 17 is made polygonal, and the storage hole 36 of the core stocker 28 and the core retaining ring 33 are Make the holes the same polygon, and adjust the placement angle for each.

[Fourth Embodiment] 1.9, 20.2] Figures 1.9 and 20.2 briefly show a fourth embodiment focusing on the core exchange mechanism 6.

Note that the mold clamping section 3 includes a fixed platen 11 and a movable platen 12.
Matrix 14. Either the type of the first embodiment in which the platens 11 and 4b are attached, or the type of the second embodiment in which the platens 11 and 12 also serve as the matrix 14 may be used.

The figure relates to a type using matrix molds 14a and 14b.

Mother mold 1.4 a has mother mold 1-4 core in b]7
A tapered core mounting hole 301 similar to the mounting hole 48 of the movable side portion 17b is formed, and a solenoid 302 used as an electromagnetic hammer is arranged on both sides of the core mounting hole 301. The structure of the mother die 1-4b side is the same as that of the first embodiment, but when the molds are clamped, the joint surfaces of both the mother molds 14a and 1-4b are brought close together, and the entire core 17 is wrapped. The difference is that the mold is clamped in a fixed manner.

The fixed side portion 17a of the core 7 has a tapered front surface as shown in FIG.
Equipped with 04. The engagement groove 304 has a wall 305 at the rear,
The front part intersects with the tapered surface and is naturally interrupted and left open.

Fixed side portion of core 17 1. When the '7a is attached to the mother mold 14a, the flange 303Q comes into contact with the rear surface of the mother mold 14a, as shown in FIG. 19, and the solenoid 302 is located in front of it.

The rotary arm 30 rotated by the servo motor M1 is configured as an air actuator and is extendable and retractable.
As shown in Figure 0, there is a core holding part 3 at the tip of the piston 306.
07 is formed. The core holding part 307, which has a rectangular cross section and cannot rotate by only expanding and contracting with respect to the cylinder side, has two fingers 308 and a lower finger 309 that are fixedly formed, and the tip side is open. In glyph, -1-finger 30
A solenoid 310 is fixed downward at 8,
The plunger 311 can protrude toward the lower finger 309. This holding portion 307 is fixed in such a position that a line connecting the upper finger 308 and the lower finger 309 is perpendicular to the axis of the core 17 mounted on the matrix 14 .

A servo motor M, 1 is fixed to the mother mold 14 a side, and a ball screw 312 is mounted parallel to the tie bar 18 . The ball screw 31-2 is connected to the motor M2. The pole nut 313 screwed thereon is moved back and forth.

The servo motor M1 that rotates the rotary arm 30 is mounted on a frame that is fixed to the above-mentioned pole nuts 1-31 and 3 and moves together with it. Therefore, the core holding portion 307 at the tip of the rotary arm is fixed. It can move back and forth with respect to the platen 11.

In this embodiment, the housing hole 36 of the core stocker 28 is a bottomed cylindrical hole with an open rear end, and has the same depth as the core mounting hole 301 in the mother die 14a. A sensor S detects the arrival of the core 17 at the bottom where the core 17 to be stored hits, and also detects the engagement groove 30 of the core 17 on the inner wall surface.
4 is provided with a positioning protrusion 314 that fits into the positioning protrusion 314.

The return actuator 32 is fixedly arranged along the axis of the storage hole 36, but in this case, it is arranged rearward from the rear end of the stroke of the rotary arm 30, and the amount of expansion and contraction of its piston is arranged along the axis. This is the distance it takes to press the rear end of the core 17 until its front end hits the bottom of the storage hole 36.

To replace the core 17, the rotary arm 30 extends and contracts its arms to approach the core 17 from the side, grab it, move backwards, and pull it out from the matrix 14a or the core stocker 28. Next, it rotates to a position where the core is stored or installed, and then moves forward at that position to store and install the core (described later). Therefore, unlike the first embodiment, there is no need for a long mounting groove 46 extending from the top surface of the mother die 14a to the core mounting portion.

[Core Exchange Control in Fourth Embodiment] Control of the core exchange mechanism in the fourth embodiment is similar to the flowchart shown in FIG. 16 above.

However, in the core exchange mechanism of this fourth embodiment, the rotary arm 30
Since the core 17 is retracted from between the mother molds 14a and i4b during the molding operation, it cannot be determined from the position of the rotary arm 30 whether the core 17 is attached to the mother mold as in step 5200.

Therefore, when the core 17 is attached to the matrix 14, it becomes 11''.
In step 5200, a flag is set to
The core 17 is determined by determining whether the flag is "1" or not.
It is determined whether or not it is attached to the mother mold 14. and,
If the flag is set to "1", steps 8201 to 5218 in FIG. 16 are performed. Next, since the air actuator 46 is not provided in this fourth embodiment, the process of turning off the solenoid valve 47 in step 5219 is not performed, and the process proceeds to step 5220, in which the movable platen 1
determines whether or not it has moved to a predetermined position from which the core 17 can be taken out, and when the movement to that position is completed, drives the servo motor M1 to a position where the core holding section 307 can hold the core 17. The rotary arm 30 is rotated and positioned.

Next, actuate the air actuator to make the piston 306
Stretch. When the piston 306 is extended, the plunger 311 of the solenoid 310 provided in the core holding part 307 is set to be in a position to engage with the engagement groove 304, so after the piston 306 is extended, Activate the solenoid 310 to connect the plunger 311 and the engagement groove 3.
04 and grip the core. Next, apply a torque limit → drive the no-poor motor M4 to issue a movement command to the position where the core 17 is completely taken out from the stationary side mother die +4a, and step 8211 to step S
214, operate the solenoid 302 to separate the core fixed side portion 1.7a and the matrix 14. Unmating a,
Take out the fixed side part 1.7a from the mounting hole 301. When the servo motor M4 reaches the set position, the piston 306 is contracted, and then the servo motor M1 rotates the rotary arm 30 and extends the piston 306 to correspond to the storage hole 36 of the core stocker 28. position, then
The servo motor M4 is driven to put the gripped core 17 into the storage hole 36. In this case, the positioning protrusion 314
is engaged with the engagement groove 304 to prevent rotation of the core 17 within the storage hole. When a predetermined amount of the core 7 is stored in the storage hole 36, the solenoid 310 is deactivated and the piston 3
06, the rotary arm 30 is rotated and positioned at the home position. Further, the solenoid valve 35 is turned on, the return actuator 32 is operated, and the core 17 is inserted into the storage hole 3G until the sensor S5 is turned on.

When the sensor S5 is turned on, the solenoid valve 35 is turned off and the flag is set to 10'' to remember that the core 17 has been removed from the mother mold 14.

When the core 17 is mounted on the mother mold 14, the servo motor M2 is driven to position the core stocker 28 at the selected core position, and then the rotary arm 30 is rotated and the piston 30 is moved.
6 to hold the selection core, and solenoid 31
0 to engage the plunger 31-1 in the engagement groove 304, drive the servo motor M4 to remove the selected core from the storage hole 36, and then rotate the rotary arm 30 with the servo motor M1 to remove the selected core from the housing hole 36. Position it at a position where it can be attached to the mold 14. Thereafter, the servo motor M4 is driven to insert the core 17 into the mounting hole 301 of the fixed mother mold 14a, and when the core 17 is inserted a predetermined amount, the movable platen 12 is advanced and the core 17 is
is fitted by a predetermined amount into the mounting hole 48 of the movable side mother die, and the fixed side mother die 1.4a and the movable side mother die 1.4a] and 4b support both ends of the core. Next, after the solenoid 310 is deactivated and the piston 306 is contracted, the rotary arm 30 is rotated and positioned at the home position.

Then, when the movable platen is moved to the position of the set mold clamping force, the core 17 is fitted and fixed in the mounting hole 301.48.

Then, the flag is set to "1" and the core mounting process is completed.

[Fifth Embodiment] FIG. 22 focuses on the core holding part 307 in the rotary arm 30, and the core holding part 307 is connected to the actuator 315.
is opened and closed by the drive of the lever 316 and the gear 317 to hold and release the core 17.

Such a core holding portion 307 can be used in place of the operation of the solenoid 54 in the case of the fourth embodiment described above with the operation of the actuator 315.

[Other Examples]

The core stocker 28 in the core exchange mechanism 6 does not rotate, but moves laterally or vertically to collect the necessary cores 17.
may be selected.

Various removal directions can be adopted, such as sideways removal and vertical removal.

The wrist of the portion holding the core may be made rotatable.

For installing the core, the groove 39 is not arc-shaped as in the above embodiment, but is linear. For example, when installing from the top of the mother mold or platen, or from the side, the core 17 is moved straight to the position. The arm with the core holding groove and the core holding groove may be moved in a straight line between positions when it is attached to the core stocker 28 and the mother mold or platen.

In addition, when the core 17 is installed through the core installation hole (48, 301), the arm holding the core is moved linearly between positions to attach it to the core stocker 28 and the mother die or platen. It is also possible to add movement back and forth at both ends of the stroke.

Effects of the invention: The core is automatically exchanged, and injection molding operations of various types and small quantities can be carried out efficiently and continuously.

Equipped with a core stocker and mold cleaning device, it does not require any effort to store cores.

[Brief explanation of drawings]

Fig. 1 is an overall block diagram of an embodiment of the present invention, Fig. 2 is a plan view shown in cross section, Fig. 3 is a perspective view, Fig. 4 is an enlarged plan view of main parts shown in cross section, and Fig. 5 The figure is a schematic plan view showing a part in cross section, Figure 6 is an overall perspective view, Figure 7 is a side view when cut along I-I in Figure 6, and Figure 8 is a FIG. 9 is a front view of the main part, partially shown in cross section. FIG. 10 is a front view of the main part, partially shown in cross section. FIG. 11 is a front view of the main part, partially shown in cross section. is a front view of the mold cleaning device, No. 12
The figure is a block diagram of the configuration of the control unit for controlling the temperature of the cores in the heating cylinder and the core stocker, Figure 13 is a block diagram of the NC device as a control device, and Figures 1-4 are the core stocker 28. FIG. 15(a) is an explanatory diagram of a table that stores the preliminary set temperature that is set when the core 17 is stored in the
(b) is a flowchart of temperature control, Figure 16 (a)
), (b). (c) and (d) are flowcharts of core exchange processing, No. 17
The figure is a plan view showing the second embodiment with a partial cross section;
8 is a plan view partially showing the third embodiment in cross section;
20 is a perspective view of the main parts, FIG. 21 is a perspective view of the core, and FIG.
FIG. 2 is a partial plan view of the fifth embodiment. DESCRIPTION OF SYMBOLS 1-... Injection molding machine, 2... Injection part, 3... Mold clamping part, 4... Injection molding machine main body (main body), 5... Mold temperature control mechanism, 6... Core exchange mechanism, 7... Core ejection device, 8... Mold cleaning device, 9... NC device, 10.
...Mold temperature control device, 11...Fixed platen, 12...
Movable platen, 13.15...Temperature control liquid passage, 14...
・Mother mold, 16... Automatic connection structure, 17... Core, 27
... Core exchange device, 28... Core stocker, 29...
Core pre-temperature control device, 30... Rotating arm, 34... Extrusion actuator, 32... Return actuator, 3
3... Core holding ring, 39... Core mounting groove, 4
0... Heater 41... Thermocouple, 45... Stopper, 48... Core mounting hole, 50... Eject rod, 52... Nijeft pin, 58... Nozzle, 60
...Air actuator.

Claims (4)

[Claims] (1) A core stocker for storing a plurality of cores assembled into a fixed side and a movable side as a pair, a core selection means for selecting a core, and a pair of cores being taken out from the core stocker. Core exchange means for transporting the core to a mounting position on the mother mold, and transporting the core from the mounting position to the core stocker for storage;
It has locking means for fixing each of the pair of cores to the corresponding respective mother molds, and a control means, and when the cores are attached to the mother mold, input to the control means is provided. drive the core selection means to select the selected core, drive the core exchange means to transport the selected core from the core stocker to a mounting position on the mother mold, and move the movable platen. to attach the cores to each mother mold, lock the pair of cores to each mother mold using the above-mentioned locking means, and automatically attach the cores to the mother molds.
When removing the cores from the mother mold, the pair of cores are joined together and held by the core holding portion of the core exchanger, and the locking means is released and the movable platen is moved to open the space between the mother molds. An automatic core exchange method in which a pair of cores are transported by the core exchange means and automatically stored in the core stocker. (2) The mother die fixed to the fixed platen has a mounting groove for guiding the core to a core mounting position, and the core changing means moves the core along the mounting groove. Automatic core exchange method described in section. (3) It has an automatic cleaning device, and when removing the core from the mother mold, the control device moves the movable platen to open the joint surface of the core, and directs the nozzle of the automatic cleaning device to the separated inside. Claim 1 or 2, wherein the core is positioned between the joint surfaces of the core and the cleaning liquid is ejected to clean the joint surfaces of the core, and then the core is taken out.
Automatic core exchange method described in section. (4) Each core storage section of the core stocker has a heater that heats the cores and a temperature sensor that detects the temperature of the core storage section, and the control means controls each core storage section. Claims 1 and 2 provide feedback control to the respective set temperatures.
Automatic core exchange method as described in Section 3 or Section 3.