JP2722274B2 - Core automatic exchange method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core exchange system for a vertical molding machine using a mold.

2. Description of the Related Art A molding machine using a mold replaces the mold when changing a molded product. When the molded product is small, and is produced in many types and in small quantities, only the core in which the molding cavity is formed in the mold may be replaced.

The core is relatively lightweight and easy to handle in view of the weight of the whole mold, but there is no molding machine provided with a core exchange mechanism.

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic core changing method that can automatically replace a core in a vertical molding machine in which a fixed mold and a movable mold are vertically arranged. And

Means for Solving the Problems A core stocker and a mold clamping mechanism are provided.

It has a core selecting means, a core exchanging means, a core protruding means, a core locking means and a control means.

A fixed core and a movable core are assembled to a core stocker to store a pair of cores.

The mold clamping mechanism performs mold clamping between an upper platen and a lower platen each having a mother die attached thereto. One of the upper platen and the lower platen is a movable platen that can move in the vertical direction, and the other is a fixed platen.

 The core projecting means includes a core projecting rod.

 The control means has the following functions.

(When attaching the core to the mother mold)

The core which is inputted from the manual input device and instructed to be taken out is selected by driving the core selecting means.

The selected core is driven from the core stocker to the core mounting position in the mother die by driving the core exchange means.

The core projecting means is operated to receive the core at the upper end of the core projecting rod.

The core projecting means is returned to the initial position, and the core is mounted on the lower platen matrix.

The movable platen is moved so that the core is mounted on the matrix of the movable platen and the fixed platen.

The fixed-side core and the movable-side core are locked to the matrix by the respective core lock means.

[When removing the core from the mold]

Move the movable platen with respect to the fixed platen,
The cores in each matrix are joined.

 Release the locking means for the upper core.

Move the movable platen to open the space between the dies. In this case, the upper platen is not always the movable platen.

 Release the lock on the lower core.

The core protruding means is operated to protrude the core from the lower platen matrix by the core protruding rod.

A pair of cores is held and transported by the core exchange means and stored in the core stocker.

Action The core stocker accommodates a plurality of cores as a pair by assembling a fixed-side core and a movable-side core.

The core selection means arranges an arbitrary core at a delivery position with respect to the core exchange means.

The core exchange means conveys the core between the mounting position for the mother die attached to the mold clamping mechanism and the delivery position in the core stocker.

 The core lock means fixes the core to the matrix.

The core protruding means protrudes the core upward from the mother die attached to the lower platen, and enables the core to be held by the core exchanging means.

The control means controls the operation of each of the above means accompanying the automatic exchange of the mold clamping mechanism and the core.

Embodiment [Structure] FIG. 1 shows a vertical injection molding machine 1, which is one of the vertical molding machines using a mold.

The injection molding machine 1 includes a mold clamping unit 2, an injection unit 3, a core stocker 4, and a numerical control device (NC device) 5.

The mold clamping part 2 and the injection part 3 are constituted by a movable part 6 having an integral frame structure as shown in FIG.
Can be moved up and down.

The mold clamping unit 2 includes a first platen 8, a second platen 9, and a third platen 10. The first platen 8 and the third platen 10 are vertically connected by four tie rods 11 in front, rear, left and right. Is a fixed part of the machine frame 7. The first, second, and third platens 8, 9, and 10 are parallel to each other, and a mold 12 is mounted on the opposing surfaces of the first and second platens 8 and 9, respectively. A ball screw / nut mechanism 13 is provided between the first platen 9 and the second platen 9, and is driven by a mold clamping servomotor 14 fixed to the third platen 10. The operation of the servo motor 14 is controlled by the NC device 5 (hereinafter, the same applies to other motors).

In the injection unit 3, a first plate 17 and a second plate 18 are provided between four front, rear, left and right guide bars 15 erected on the first platen 8 of the mold clamping unit 2 and a base plate 16 fixed to the upper end thereof. And an injection mechanism 20 having a third plate 19,
The guide bar 15 is slidably mounted in the up-down direction.

In the injection mechanism 20, the first plate 17 and the third plate
19 is connected by four tie bars 21 in the front-rear and left-right directions, and the second plate 18 is guided by the guide bar 15 to be slidably mounted in the vertical direction. 1st, 2nd, 3rd plate 1
7, 18 and 19 are arranged in parallel with each other, and a cylinder assembly 22 is fixed vertically on the lower surface of the third plate 19 with the nozzle downward, and the upper end of the screw inside the second plate is the second.
Servomotor for weighing that is rotatably supported on the plate 18
Driven by 23. Also, the first plate
A ball screw / nut mechanism 24 is provided between 17 and the second plate 18 and is driven by a servomotor 25 for injection.

Further, a ball screw / nut mechanism 26 is provided between the entire injection mechanism 20 and the base plate 16, and is driven by a nozzle touch motor 27. Note that the stop of the motor 27 is based on a signal from a limit switch or the like which is operated by the movement of the injection mechanism 20.

Reference numeral 28 denotes a hopper for accommodating and supplying the molding material. Reference numeral 29 denotes a two-stage eject mechanism attached to the lower surface of the second platen 9 (described later).

The tie rod 11 in the mold clamping unit 2 and the tie bar 15 in the ejection unit 3 are vertically guided by the machine frame 7, and the movable unit including the mold clamping unit 2 and the ejection unit 3 excluding the second platen 9. 6 is driven up and down by a ball screw / nut mechanism 13 driven by a mold clamping servomotor 14. Thus, a mold clamping mechanism for clamping and opening the mold between the molds 12 (a, b) fixed to the first platen 8 and the second platen is configured.

In this embodiment, the first platen 8 is both the movable platen 8 and the upper platen 8, and
The second platen 9 is a fixed platen 9 and a lower platen 9.

The core stocker 4 has a guide bar 31 erected on the base 30.
An elevating plate 32 is slidably mounted in the vertical direction, and a turntable 33 is mounted on the elevating plate 32.

Ball screw and nut mechanism between base 30 and lift plate 32
34 is provided, and is driven by a lifting motor 35. Further, the turntable 33 is driven by an arbitrary predetermined amount by a selection servomotor 36.
The lifting motor 35 is stopped by a signal from an upper limit switch H, a lower limit switch L, or the like, which is operated by moving the lifting plate 32.

The turntable 33 has storage holes 38 for cores 37 at equal intervals on the upper surface (FIG. 1), and a heater 39 for preliminary temperature control is arranged in each storage hole 38. These heaters 39 are placed under the control of the NC device 5, and based on the temperature detected from the thermocouples respectively arranged in the respective storage holes 38, by turning on / off the switches for the heaters and adjusting the energization time to a short or long time, The temperature of the preliminary temperature control is controlled.

The core 37 is an upper core 37a as seen in FIG.
The lower core 37b is paired with the lower core 37b.
Has a flange 40 at the top. The core 37 has a pair of upper and lower parts joined together and is housed in a housing hole 38 of the turntable 33.

The mold 12 is composed of a core 37 and a matrix 41 (FIGS. 1 and 5). The molds 41 (a, b) is the first,
It is fixed to the second platens 8, 9 so that any core 37 on the turntable 33 can be mounted. That is, the mounting structure of the core 37 with respect to the matrix 41 is unified.

Each of the mother dies 41a, 41b has a core 37a, 3 attached thereto.
7b, the lock pins 42 (a,
b). Each of the pins 42 is driven by a solenoid 43 (a, b) operated by the NC device 5, and constitutes a core locking means. The operating position and the retracted position of each lock pin 42 can be detected by a position detector such as a limit switch.

In FIGS. 4 and 5, reference numeral 44 (a, b) denotes a temperature control liquid flow path provided in the core 37, and reference numeral 45 (a, b) denotes a temperature control liquid flow path provided in the matrix 41. Connected to the mold temperature controller (not shown) via the attached platens 8, 9
By attaching the core 37 to 41, these flow paths are automatically connected.

Reference numeral 46 denotes a resin flow path, and reference numeral 47 denotes a molding cavity. Further, an eject pin 48 is disposed on the lower core 37b so as to face the resin flow path 46, and is slidable up and down via a spring 49.

Between the core stocker 4 and the mold clamping part 2, a core exchanging arm 50 is disposed with its base supported by a vertical axis on the second platen 9, and the core exchanging servomotor 51 The hand 52 is driven to reciprocate horizontally between the core mounting position A on the lower master block 41b and the delivery position B (the position shown in FIGS. 1 and 2) of the selected core 37 in the core stocker 4. To form a core exchange means.

The hand 52 has an opening angle of 180 ° as shown in FIG.
It is a knob type from both sides as described above, and is opened and closed by a solenoid (not shown). Solenoid is NC
It is energized by a command from the device 5.

The two-stage eject mechanism 29 has a hollow core projecting rod 53
And a servomotor 54 for ejecting, and a ball screw / nut mechanism 55 composed of a nut provided at the base of the rod 53 and a ball screw driven by the motor. In the state shown in FIG. 5 in which the core 37b is mounted, the core projecting rod 53 projects only the eject pin 48 against the spring 49 from the initial position where the core 37b is not operated in the state shown in FIG. In the first stage position, the eject pin 48 is pushed up as shown in FIG. 4 and the core 37 is also lifted, and the bottom stage is operated at the second stage position where the bottom surface is higher than the upper surface of the lower mold 41b. I do.

FIG. 7 is a block diagram of the NC device 5 as a control device.

The NC device 5 has a microprocessor (hereinafter, referred to as CPU) 101 for NC and a CPU 102 for a programmable machine controller (hereinafter, referred to as PMC).
Is connected to a ROM 109 storing a sequence program for controlling a sequence operation of the injection molding machine and a RAM 108 used for temporarily storing data.

The NC CPU 101 has a ROM 107 storing a management program for controlling the entire injection molding machine, and is used for injection, mold clamping, weighing, driving of the core replacement arm 50, driving of the core stocker 4,
A servo circuit 105 for driving and controlling a servo motor of each axis for an ejector or the like is connected via a servo interface 104. Reference numeral 110 denotes a non-volatile shared RAM composed of a bubble memory and a MOS memory, which stores a memory unit for storing an NC program for controlling each operation of the injection molding machine 1 and various setting values, parameters, and macro variables. And a setting memory unit.

103 is a bus arbiter controller (hereinafter called BAC)
In the BAC 103, the CPU 101 for NC and the CPU 102 for PMC, the shared RAM 1
10, each bus of the input circuit 111 and the output circuit 112 is connected,
The bus used is controlled by C103. Reference numeral 114 denotes a manual data input device with a CRT display device (hereinafter referred to as CRT / MDI) connected to the BAC 103 via the operator panel controller 113, and is operated by operating various operation keys such as soft keys and numeric keys. Command and setting data can be input. Reference numeral 106 denotes a RAM connected to the NC CPU 101 via a bus, which is used for temporary storage of data and the like.

The output circuit 112 is connected to the nozzle touch motor 27, the elevating motor 35, the solenoid 43, the respective band heaters of the cylinder assembly 22, and the switches of the heaters 39 provided in the respective storage holes 38 of the core stocker 4. .

Also, the input circuit 111 is used to start various sensors and start / stop operation.
It is connected to a detector that notifies the end etc.

The servo circuit 105 is connected to the servomotors of the respective axes described above, and is connected to a position detector such as a pulse coder for detecting the rotational position of the servomotor provided on each servomotor. Is controlled.

In the configuration as described above, the NC device 9 includes the shared RAM 110
The PMC CPU 102 performs the sequence control by the NC program for controlling each operation of the injection molding machine stored in the ROM and the parameters such as various molding conditions stored in the setting memory section and the sequence program stored in the ROM 109. The NC CPU 101 distributes pulses to servo circuits of each axis of the injection molding machine via the servo interface 104 to control the injection molding machine.

[Overall operation]

Injection molding operations: metering, mold clamping, injection, holding pressure,
The operation processing control such as cooling, mold opening, and ejecting performs the same operation as that of the conventional horizontal injection molding machine, and therefore only the outline thereof will be described.

Each of the first platen 8 and the second platen 9 has a matrix 41
(A, b) is attached, and the cores 37 (a, b) whose temperature has been preliminarily adjusted via the core exchange arms 50 are attached to the respective mother dies 41.

 The core replacement arm 50 is retracted from the area of the mold clamping section 2.

When the completion of the nozzle touch state by the nozzle touch motor 27 is confirmed, the injection molding machine 1 starts the molding operation.

By the driving of the mold clamping motor 14, the entire movable portion 6 is lowered, and the mold 12a of the first platen 8 and the mold 12b of the second platen 8
The mold is clamped between the cores (substantially between the cores 37a and 37b), and on the other hand, the material resin is introduced into the interior of the syringe assembly 22 by the driving of the measuring motor 23, and is melted while applying a back pressure. .

After confirming the lock-up state, the second plate 18 advances by driving the injection motor 25 to inject the resin.

After the pressure holding and cooling, the mold is opened by the reverse rotation of the mold clamping motor 14, while the molten resin is accumulated in the cylinder assembly 22 by the driving of the measuring motor 18 in the same manner as described above.

After the mold opening state is confirmed, the eject servomotor 54 of the two-stage eject mechanism 29 operates to the first stage, and only the eject pin 48 is pushed up by the core projecting rod 53,
Protrude the product.

It should be noted that whether the eject servo motor 54 is operated in the first stage in which only the eject pin 48 is pushed up or in the second stage in which the lower core 37b is also pushed up is determined by an injection molding process and a core exchange operation to be described later. The distinction is made by the PMC CPU 102 recognizing different flags set in the processing.

 This operation is roughly repeated, and injection molding is performed.

[Core Replacement Operation] When the molding using one core 37 is completed, the core 37 is replaced with a core 37 suitable for the next product.

FIG. 8 is an explanatory view of a table Tb for storing the relationship between the storage hole 38 set when the core 37 is stored in the core stocker 4 and the core 37 stored therein, and is provided in the shared RAM 110.

When storing each core 37 in the storage hole 38, the CRT / MDI 114 is operated to switch the screen of the CRT to the core setting screen, and to change the storage hole numbers (codes) FC1 to FC7 as shown in FIG. Corresponding, the name of the core stored in each storage hole (core code)
Set 37-1 to 37-7.

In the drawing, Q1 to Q7 are the rotational positions of the storage holes 38, that is, the rotational positions of the selection servomotor 36 for driving the core stocker 4, and the rotational positions Q1 to Q7 are By positioning each storage hole FC1
~ FC7 can be positioned at the core removal position.
Since this position is fixedly determined, there is no need to set it, and the setting was input when the injection molding machine was manufactured, and this position is not displayed on the CRT screen.

The codes 37-1 to 37-7 of the cores 37 stored in the respective storage holes 38 in this manner are stored in the shared RAM 110.

9 (a), 9 (b), 9 (c) and 9 (d) show the case where the core exchange command is inputted,
5 is a flowchart of a process performed by the NC device 5;

This flowchart starts when a core code to be used is input and a core replacement command is input.

The hand 52 of the core exchange arm 50 sets the core transfer position B on the turntable 33 of the core stocker 4 as a home position, and this position is a position where the core exchange arm 50 is retracted from the area of the mold clamping portion 2. The hand 52 is always open.

The rotation position of each servo motor is determined by the servo circuit of each axis.
The NC CPU 101 reads and stores the read data in the shared RAM 110 via the servo interface 105.

A core exchange command is input from the CRT / MDI 114 or a program (step S200).

The PMC CPU 102 reads the number of moldings of the shared RAM 110 via the BAC 103 and compares the number of moldings with the set number of moldings to determine whether or not the molding operation has been completed. If not completed, an alarm is issued to urge the core replacement command to be canceled. On the other hand, if the molding operation has been completed, the flag F indicating the core exchange process is set to 1, the rotational position of the mold clamping motor 14 in the shared RAM 110 is read, and the mold clamping unit 2 is in the mold open state. It is determined whether or not (steps S201, 202, 203, 204).

If the mold is not open, the PMC CPU 102
Command the NC CPU 101 to raise the first platen 8 to the mold opening position, the NC CPU 101 performs pulse distribution to the mold clamping servomotor 14, moves the first platen 8,
When the first platen 8 reaches within the in-position width related to the mold opening position by a signal from the position detector attached to the mold clamping servomotor 14, the mold opening completion signal is sent to PM.
Transmission to the C CPU 102 via the shared RAM 110 (step S20
Five).

The movement command to the servo motor of each axis issued from the PMC CPU 102 is issued via the shared RAM 110 as described above, and the drive control of the servo motor of each axis is controlled by the NC CPU 101. In the following, the PMC
The exchange of signals between the CPU 102 for the NC and the CPU 101 for the NC and the drive control of the servo motor of the CPU 101 for the NC are the same as those in the related art, and the description thereof will be omitted.

The first platen 8 is lowered to the mold touch position, and the upper and lower cores 37 (a, b) are joined (step S206... FIG. 10).

When the mold touch complete signal is output from the NC CPU 101, PM
The C CPU 102 is connected to the solenoid 43a via the output circuit 112.
(Fig. 5) is turned off, and the core 37a in the upper mold 41a is turned off.
Is unlocked (step S207 ... FIG. 10).

The limit switch is operated by the retreat movement of the lock pin 42a, and when the PMC CPU 102 confirms the signal from the input circuit 111, the PMC CPU 102 instructs the NC CPU 101 to perform a mold opening operation. As a result, the first platen 8 is moved to the upper core 37.
The upper core 37 is moved upward while being left joined to the lower core 37b, and the core 37 having the upper and lower cores joined at the position A of the second platen 9 (step S208... FIG. 10). ).

When the mold opening completion signal arrives, the PMC CPU 102 turns off the solenoid 43b via the output circuit 112, and
Unlock the core 37b in 41b (step S209)
… Figure 10).

When the retraction of the lock pin 42b is confirmed by a signal from a limit switch or the like in the same manner as described above, the PMC CPU 102 issues a command to turn on the ejector servomotor 54 of the two-stage ejector mechanism 29 and the flag F = 1, so that , Up to the second stage. Thereby, the core 37 is pushed up from the lower master block 41b, and the hand 52 of the core replacement arm 50 can be held (step S210 ... FIG. 10).

After obtaining the second stage position completion signal, the PMC CPU 102
A command is issued to move 2 from the B position to the A position, and the core exchange servomotor 51 is driven to rotate the core exchange arm 50. In this case, since the hand 52 is opened by 180 ° or more, the claws of the hand 52 do not collide with the core 37 (step S2).
11).

The hand 52 is closed, and the core 37 is held by the flange 40 (step S212 ... FIG. 10). The ejector servomotor 51 of the two-stage ejector 29 is reversed to lower the core protruding rod 53 to the initial position, The tip of the rod 53 protruding from the bottom surface of the lower core 37b is pulled out (step S213).

When a signal indicating that the core protruding rod 53 has been moved to the initial position is obtained, the PMC CPU 102 issues a command to move the hand 52 from the position A to the position B, and drives the core replacement servo motor 51 to replace the core. The arm 50 is rotated (step S214 ... FIG. 10).

When the completion of the B position of the hand 52 is confirmed, the lifting motor
35 is raised until limit switch H is activated. At this time, since the turntable 33 keeps its position with the core 37 removed last time, the core 37 held by the hand 52 and transported to the position B is stored in the original core storage hole 38. (Steps S215, S216).

When the operation of the limit switch H is confirmed from the input circuit 111, the PMC CPU 102 issues a command to open the hand 52, and stores the transported core 37 in the core stocker 4. The core rotating arm 50 maintains the position, and the hand 52 remains open (step S217).

Next, the code of the core 37 used this time is instructed from the CRT / MDI 114 or the program (step S218).

Core of code instructed from table Tb of shared RAM 110
37 is selected (selected core), the rotation amount up to the selected core position (Q) is calculated based on the core transfer position B, and the shared RAM 1 is selected.
Put in 10. NC CPU 10 that performs the processing of step S219
1. A series of processing parts in the NC device 5, such as the PMC CPU 102, are core selection means (step S219).

The PMC CPU 102 instructs the rotation of the calculated amount to drive the selection servo motor 36, and the selected core of the core stocker 4 is selected.
37 is arranged at the delivery position B (step S220).

When the movement completion signal of the table 33 is output from the NC CPU 101, the hand 52 is closed and the selected core 37 is held. Each core 37 on the turntable 33 holds the flange 40 from the upper surface of the table as shown in FIG. 2 so that the claw of the hand 52 can enter the gap (step S2).
twenty one).

The PMC CPU 102 instructs the elevating servomotor 35 to lower the elevating plate 32, and waits for the limit switch L to operate (steps S222 and S223).

When the operation of the limit switch L is confirmed via the input circuit 111, the PMC CPU 102 issues a command to move the hand 52 from the position B to the position A, and the core replacement servomotor
By driving 51, the core exchange arm 50 is rotated. Thus, the selected core 37 is transported to the mounting position A with respect to the mother die (step S224... FIG. 10).

The two-stage ejector mechanism 29 is operated to the second stage in the same manner as described above, and the transported selection core 37 is supported from below (step S225... FIG. 10).

When the second-stage position of the core projecting rod 53 by the ejector servomotor 54 is confirmed, the hand 52 is opened,
Also, the core replacement motor 51 is driven to return the core replacement arm 50 to the home position B. The selected core 37 is placed on the upper end of the core protruding rod 53 and left there (step
S226 ... Figure 10).

On the other hand, the ejector servomotor 54 is operated,
The core projecting rod 53 is set to the initial position. As a result, the selected core 37 is mounted on the lower mold 41b (step S227... FIG. 10).

When it is confirmed that the core projecting rod 53 is at the initial position, the PMC CPU 102 outputs the solenoid 43 via the output circuit 112.
B is urged to lock the lower core 37b with the lock pin 42b (step S228 ... FIG. 10).

The PMC CPU 102 confirms that the core replacement arm 50 is at the retracted position from the rotational position of the core replacement servo motor 51 in the shared RAM 110, and lowers the first platen 8 to the mold touch position. At this time, the core 37 on the turntable 33 is standardized as described above, and the mold touch position is almost constant, so the mold touch position is shared during the initial mold thickness adjustment.
The one stored in the RAM 110 is used. In addition, even if there is a slight displacement, the lock pin 42b is corrected to the correct position when the lock pin 42b is pressed (Step S229).

In the same manner as above, the solenoid 43a of the upper master block 41a is urged, and the upper core 37a is actuated by the lock pin 42a.
Is locked to the master block 37a. As a result, the lower core 37b is fixed to the lower master 41b, and the upper core 37a is fixed to the upper master 41a, and the replacement of the core is completed.

The core replacement arm 50 is at the home position, and the turntable 33 is at the lowered position (step S230).

Then, the flag F = 1 indicating the core replacement process is set to the flag F = 0 indicating that the process is not the core process, and the process of the core replacement operation is terminated (step S231).

In this way, the used core 37 and the selected core 37 on the turntable 33 are automatically exchanged. Selected core
37 is any commanded by the CRT / MDI 114 or from the molding program.

If the instruction is to simply remove the core from the mother mold instead of exchanging the core, the processing from step S200 to step S217 is performed, and the processing ends.

If only the newly selected core 37 is to be mounted, the process is continued from step S218 to step S231, and steps S203 to S205 are inserted between steps S219 and 220.

[Second Embodiment] FIG. 3 is a second embodiment relating to a vertical injection molding machine, and differs from the first embodiment in that the movable portion 6 is different.

That is, the mold clamping unit 2 and the injection unit 3 are structurally separated, and the guide bar 15 supporting the injection unit 3 is fixed to the machine frame 7, while the mold clamping unit 2 connects the first platen 8 to the machine frame. 7, and the second platen 9 is movable. Therefore, the upper end of the tie rod 11 is fixed to the machine frame 7, and the lower mold 12 moves upward to perform mold clamping.

The injection molding operation and the core replacement operation are almost the same as those in the first embodiment, but the first
The operation of the platen 8 is the operation of the second platen 9, and the position of the second platen 9 at the mold opening position is
This is the same as the position of the second platen 9 in the first embodiment.

In the case of this embodiment, only the second platen 9 and the lower mold 12b are driven by the mold clamping servomotor 14, and the entirety including the injection unit 3 as in the first embodiment is each time. It is lighter than moving. However, since the lower mold 12b to be received is the movable side, it may be inconvenient in the case of molding or the like.

 The above is the embodiment.

The reason for checking the mold opening state in steps S204 and S205 is to make the base point of the mold touch in the next step S206 the same as that at the time of mold thickness adjustment and to wipe out the position error during other operations. However, this step may be eliminated and the first platen 8 (first embodiment) may be directly moved from the current rotation position of the mold clamping servomotor 14 to the mold touch position.

The core 37 is exchangeably mounted on a matrix 41 of the mold 12 attached to the first platen 8 and the second platen 9.
When the replacement of 41 (which means the replacement of all the cores 37 on the turntable 33) is rarely performed, the mother die 41 is omitted and the first and second platens 8, 9 themselves are respectively provided. Matrix 41
May be provided with the structure and function.

Advantages of the Invention In a vertical molding machine, prepared cores are automatically replaced, and a wide variety of products can be continuously produced, so that setup, labor and replacement work for core replacement can be omitted. In addition, the production schedule can be efficiently digested. In particular, when each product is manufactured in small quantities, the efficiency is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view, FIG. 2 is a schematic front view showing a part of the cross section, FIG. 3 is a schematic front view showing a part of another embodiment in a cross section, FIG. Fig. 5 is a cross-sectional view, Fig. 5 is a cross-sectional view, Fig. 6 is a plan view, Fig. 7 is a block diagram of an NC device, Fig. 8 is an example of a stored table, Figs. ) Is a flowchart showing an example of the processing, and FIG. 10 is a schematic diagram showing the order of operation. 2 ... mold clamping section, 3 ... injection section, 4 ... core stocker, 5
…… NC device, 8 …… First platen, 9 …… Second platen, 29 …… Two-stage eject mechanism, 32 …… Elevating plate, 33…
Turntable, 37 ... Core, 41 ... Matrix, 50 ... Core replacement arm.

Continuing on the front page (72) Inventor Susumu Ito 3580 Kobaba, Shinobazu, Oshino-mura, Minamitsuru-gun, Yamanashi Pref. (72) Inventor Kikuo Watanabe 3580 Kobaba, Oshino-mura, Oshino-mura, Minamitsuru-gun, Yamanashi Prefecture FANUC Co., Ltd. Address FANUC CORPORATION Product Development Research Center (72) Inventor Toshio Matsukura 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Industrial Co., Ltd. (72) Inventor Kaoru Maeda 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Inventor Hiroshi Yonekubo 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Inventor Kenji Haga Shibuya-ku, Tokyo 2-43-2, Kagaya, Olympus Optical Industrial Co., Ltd. (72) Inventor Kazunari Tokuda 2-43-2, Hatagaya, Shibuya-ku, Tokyo Olympus Optical Industrial Co., Ltd. (56) References JP-A-3-272822 (JP, A)

Claims (1)

(57) [Claims] 1. A mold stocker for assembling a fixed side and a movable side and storing a plurality of cores as a pair, and a mold clamp for clamping between an upper platen and a lower platen each having a mother die attached thereto. A core selecting means for selecting a core, a pair of cores being taken out of the core stocker, a core being conveyed to a mounting position of the mother die, and a core being moved from the mounting position to the core stocker. Core exchange means for transporting and storing the core, a core ejection means provided with a core ejection rod provided on the lower platen, and a lock means for fixing each of the pair of cores to a corresponding master block, Control means, when the core is mounted on the mother die, the control means selects the core input to the control means by driving the core selection means, and selects the selected core. Drive the core exchange means from the core stocker Conveyed to the mounting position of the mold, receive the selected core at the upper end of the core protruding rod, then inactivate the core protruding means and mount the core on the matrix of the lower platen, upper platen, The movable platen that can move in the vertical direction among the lower platens is moved so that the cores are mounted on the respective masters, and a pair of the cores are locked to the respective masters by the respective core locking means, thereby forming the masters. When the core is automatically attached to the core and the core is removed from the mother die, after the pair of cores are joined, the core locking means for the upper core is released, and the movable platen is moved. To open the space between the mother molds, then release the core lock on the lower core, push out the core joined by the core protrusion rod of the core protrusion means from the lower mold, and use the core exchange means. Hold and transport a pair of cores Automatically core automatic exchange scheme, characterized in that housed in.