JPH04110109A - Automatic exchange method of core - Google Patents

Abstract

PURPOSE:To exchange automatically a core, by a method wherein the above method is provided with a core stocker keeping a plurality of cores where the stationary and movable side cores are paired and a mold clamping mechanism and a control device drives and controls a selecting device, exchange device, ejector device and locking device of the core. CONSTITUTION:At the time of fitting of a core to a matrix, an input core is selected by driving a core selecting device and a selected core 37 is conveyed to a fitting position of the matrix from the stocker 4 by driving an exchange device, in a control device. The above-mentioned core is received by the top of an ejector rod of an ejector device and the same is fitted to the matrix 41b of a lower platen. The core is made into a fitted state to the matrixes by moving a movable platen and locked to the matrixes each by a locking device. At the time of removal of the core from the matrix, a pair of the cores are made into a joined state, the locking device of the upper core is released and the matrixes are broken. Locking of the lower core is released, the core is ejected by the ejector rod, the pair of the cores are held and conveyed by the exchange device and held into the stocker.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to a core exchange system for a vertical molding machine using a mold.

Molding machines that use prior art molds change the mold when changing the molded product. The molded products are small and have a wide variety of products.
In the case of small-volume production, only the molding cavity or core formed in the mold may be replaced.

Considering the weight of the entire mold, the core is relatively easy to weigh and handle, and no molding machine is equipped with a core exchange mechanism.

Problems to be Solved by the Invention An object of the present invention is to provide an automatic core exchange system that can automatically exchange the core in a vertical molding machine in which a fixed side mold and a movable side mold are arranged above and below. shall be.

Means to solve problems Equipped with a core stocker and mold clamping mechanism.

It has a core selection means, a core exchange means, a core ejecting means, a core locking means, and a control means.

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

The mold clamping mechanism consists of an upper platen with a matrix attached to each
The mold is clamped between the lower platens.

The core ejecting means includes a core ejecting rod.

The control means shall have the following functions:

[When attaching the core to the mother mold]

The input core is selected by driving the core selection means.

The selected core is transported from the core stocker to the mounting position of the mother mold by driving the core exchange means.

The core ejection means is actuated to receive the core at the upper end of the core ejection rod.

With the core ejecting means inactive, the core is mounted on the matrix of the lower platen.

The movable platen is moved to attach the core to each mother die.

A pair of cores is respectively locked to each mother mold by each of the core locking means described above.

[When removing the core from the mother mold]

A pair of cores is brought into a bonded state.

The locking means for the upper core is released.

Move the movable platen to open the space between the molds.

Release the lock on the lower tang.

The core ejecting means is operated to eject the core from the mother mold using the core ejecting rod.

A pair of cores is held and conveyed by a core exchange means and stored in a core stocker.

The working core stocker accommodates a plurality of cores, which are made into a pair by assembling a fixed side and a movable side.

The core selection means places any desired core at a delivery position with respect to the core exchange means.

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

The core locking means fixes the core to the mother mold.

The core ejecting means projects the core upward from the mother mold attached to the lower platen, and allows the core to be held by the core exchange means.

The control means controls the operation of the above-mentioned means associated with automatic replacement 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 that uses a mold.

The injection molding machine 1 includes a mold clamping section 2, an injection section 3, and 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. 2, and can be moved up and down with respect to the machine frame 7 of the injection molding machine 1 as a whole.

The mold clamping section 2 includes a first platen 8, a second platen 9, and a third platen 10.
are vertically connected by four tie rods 11 in the front, rear, left and right, and the second platen 10 is a part of the machine frame 7 and is in a fixed position. Also, each of the first, second, and third platens 8. 9. 10 are parallel to each other, molds 12 are mounted on the opposing surfaces of the first platen 8 and the second platen 9, and a ball screw/nut mechanism 13 is provided between the third platen 10 and the second platen 9. and is driven by a mold clamping servo motor 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 section 3, a first plate 17,
An injection mechanism 20 including a second plate 18 and a third plate 19 is mounted on the guide bar 15 so as to be slidable in the vertical direction.

In the injection mechanism 20, the first plate 17 and the third plate 19 are connected by four tie bars 21 on the front, rear, left and right sides, and the second plate 18 is guided by the guide bar 15 and installed between them so as to be slidable in the vertical direction. There is. 1st, 2nd, 3rd
The plates 17, 18 and 19 are arranged parallel to each other, and a cylinder assembly 22 is fixed vertically on the lower surface of the third plate 19 with the nozzle facing downward, and the upper end of the screw inside the cylinder assembly 22 is rotated to the second plate 18. It is rotatably supported on a shaft and driven by a measuring servo motor 23. Further, a hole screw/nut mechanism 24 is provided between the first plate 17 and the second plate 18, and is driven by an injection servo motor 25.

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 motor 27 is stopped by a signal from a limit switch or the like that is activated when the injection mechanism 20 moves.

A hopper 28 stores and supplies molding material. Reference numeral 29 is 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 part 2 and the tie bar 15 in the injection part 3 are guided in the vertical direction by the machine frame 7, and the movable part consisting of the mold clamping part 2 and the injection part 3 except for the second platen 9. 6 is the mold clamping servo motor 14
It is driven up and down by a ball screw/nut mechanism 13 driven by.

As a result, a mold clamping mechanism is configured to clamp and open the molds between the molds 12 (a, b) fixed to the first platen 8 and the second platen.

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

The core stocker 4 has a guide bar 3 erected on the base 30.
An elevating plate 32 is attached to the elevating plate 1 so as to be slidable in the vertical direction, and a turntable 33 is mounted on the elevating plate 32.

A ball screw/nut mechanism 34 is provided between the base 30 and the elevating plate 32, and is driven by an elevating motor 35. Furthermore, the turntable 33 can be moved by an arbitrary predetermined amount by a selecting servo motor 36. It is designed to be driven. The lifting motor 35 is stopped by signals from an upper limit switch H1, a lower limit switch L, etc., which are activated when the lifting plate 32 moves.

The turntable 33 has housing holes 38 for the cores 37 at equal intervals on the upper surface (FIG. 1), and a heater 39 for preliminary temperature control is arranged in each housing hole 38. These heaters 39 are placed under the control of the NC device 5, and based on the detected temperature from the thermocouples placed in each storage hole 38, the switches for the heaters are turned on and off to adjust the energization time to a longer or shorter time. The temperature of the preliminary temperature adjustment is controlled.

The core 37 is located at the upper core 37 as shown in FIG.
A (movable side) and a lower core 37b (fixed side) form a pair, and the lower core 37b has a flange 40 on the upper part. The upper and lower pairs of the cores 37 are joined and housed in the storage hole 38 of the turntable 33.

The mold 12 is composed of a core 37 and a matrix 41 (FIGS. 1 and 5), and the matrix 41 (a) in the movable side and fixed side (upper and lower) molds.

b) is fixed in advance to the first and second platens 8 and 9, so that any core 37 on the turntable 33 can be mounted thereon. That is, the core 37 has a unified structure for attaching to the mother die 41.

Each of the master molds 4], a, and 41b has a lock pin 42 (a, b) that protrudes from the side and engages with the core 37a, 37b mounted thereon.

The pins 42 are each driven by solenoids 43 (a, b) operated by the NC device 5, and constitute core locking means. The operating position and retracted position of each lock pin 42 can be detected by a position detector such as a respective limit switch.

In Figures 4 and 5, the code 44 (a, b) indicates the core 3.
Temperature control liquid flow path provided in 7, code 45 (a, b)
is a temperature control liquid flow path provided in the mother mold 41 and is connected to a mold temperature control device (not shown) via the platens 8 and 9 attached to each, and the core 37 is placed in the mother mold 41. Once installed, these channels are automatically connected.

Further, reference numeral 46 is a resin flow path, and reference numeral 47 is a molding cavity. Furthermore, the resin flow path 4 is provided in the lower core 37b.
An eject pin 48 is disposed opposite to 6 and is vertically slidable via a spring 49.

A core exchange arm 50 is disposed between the core stocker 4 and the mold clamping unit 2 with its base supported by a vertical axis on the second platen 9, and a core exchange servo motor 51 moves the tip of the core exchange arm 50. hand 5
2 is horizontally reciprocated between the core attachment value fiA of the lower matrix 41b and the delivery position B (positions shown in FIGS. 1 and 2) of the selected core 37 in the core stocker 4. , forming a core exchange means.

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

The two-stage eject mechanism 29 is a hollow core ejecting rod 5
3, an eject servo motor 54, and a ball screw/nut mechanism 55 consisting of a nut provided at the base of the rod 53 and a ball screw driven by the motor.
Equipped with Then, the core ejecting rod 53 pushes out only the eject pin 48 against the spring 49 from the initial position of the non-operating state in the state shown in FIG. 5 in which the core 37b is attached by the ejecting servo motor 54. The eject pin 48 is pushed up as shown in FIG. 4, and the core 37 is also lifted up so that its bottom surface is above the upper surface of the lower mother die 41b. do.

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

The NC device 5 is a microprocessor for NC (hereinafter, CP
It has a CPU 102 for a programmable machine controller (hereinafter referred to as PMC), and the PMC CPU 102 has a ROM that stores sequence programs etc. for controlling sequence operations of the injection molding machine.
109 and a RAM 108 used for temporary storage of data.

The NC CPU 101 has a ROMI 07 that stores a management program for controlling the injection molding machine as a whole, as well as for injection, mold clamping, measuring, driving the core exchange arm 50, driving the core stocker 4, and ejector. A servo circuit 105 for driving and controlling servo motors for each axis is connected via a servo interface 104. Further, 110 is a non-volatile shared RAM composed of bubble memory or CMOS memory, and includes a memory section for storing NC programs and the like for controlling each operation of the injection molding machine 1, and various setting values.

It has a setting memory section that stores parameters and macro variables.

103 is a bus arbiter controller (hereinafter referred to as BAC), and the BAC 103 has a CPU 101 for NC and P
MC CPU102. Shared RAM 110, input circuit 11
1. Each bus of the output circuit 112 is connected, and the BAC10
3 controls the bus to be used.

In addition, 114 is a manual data input device with a CRT display connected to the BAC 103 via the operator panel controller 113 (hereinafter referred to as CRT/MDI). It is possible to input commands and setting data. Note that 1-06 is a RAM connected to the NC CPU 21 by bus and used for temporary storage of data.

The output circuit 112 includes a nozzle touch motor 27, a lifting motor 35, a solenoid 43, and a cylinder assembly 22.
It is connected to the switch of each band heater and the heater 39 provided in each storage hole 38 of the core stocker 4.

In addition, the input circuit 111 is connected to various sensors and to start/start operations.
It is connected to a detector that tells you when it is finished.

The servo circuit 105 is connected to the servo motors for each axis described above, and is also connected to a position detector such as a pulse coder that detects the rotational position of the servo motor provided in each servo motor, and detects the speed and position of each servo motor. is designed to be controlled.

In the above configuration, the NC device 9 has a shared RAM
NC that controls each operation of the injection molding machine stored in ll0
While the PMC CPU 109 performs sequence control based on the programs and parameters such as various molding conditions stored in the setting memory section and the sequence program stored in the ROM 109, the NC CPU 10I controls the servo circuits for each axis of the injection molding machine. to servo interface 1
04 to control the injection molding machine.

[Overall operation]

Injection molding operations, namely metering, mold clamping, and injection.

Operation processing control such as holding pressure, cooling, mold opening, ejecting, etc.
Since the operation is similar to that of a conventional horizontal injection molding machine, only the outline thereof will be explained.

A matrix 41 is placed on the first platen 8 and the second platen 9, respectively.
(a, b) are attached, and the cores 37 (a, b) whose temperature has been preliminarily controlled are attached to the respective mother molds 41 via the core exchange arm 50.

The core exchange arm 50 retreats 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 a molding operation.

By driving the mold clamping motor 14, the entire movable part 6 is lowered, and the mold is clamped between the mold 12a of the first platen 8 and the mold 12b of the second platen (actually between the cores 37a and 37b). On the other hand, the material resin is introduced into the cylinder assembly 22 by driving the metering motor 23, and is melted while being applied with back pressure.

After confirming the lock-up state, the second plate 18 is driven forward by the injection motor 25 to inject the resin.

After holding pressure and cooling, the mold is opened by rotating the mold clamping motor 14 in the reverse direction, while the metering motor 18 is driven to accumulate molten resin inside the cylinder assembly 22 in the same manner as described above.

After the mold opening state is confirmed, the eject servo motor 54 of the two-stage eject mechanism 29 operates to the first stage, and the core ejecting rod 53 pushes up only the eject pin 48, thereby ejecting the product.

It should be noted that whether the eject servo motor 54 should be operated in the first stage to push up only the eject pin 48 or in the second stage to push up the lower core 37b as well depends on the injection molding process and core replacement described later. They are distinguished by the PMCMC CPU 102 recognizing different flags set during processing.

In general, this operation is repeated to perform injection molding.

[Core Exchange Operation] When 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 diagram of a table Tb that stores 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.
located within.

When storing each core 37 in the storage hole 38, the CRT/MD
Operate I114 to switch the CRT screen to the core setting screen, and enter the storage hole number (code) F as shown in Figure 8.
Names (core codes) 37-1 to 37-7 of the cores stored in the respective storage holes are set corresponding to C1 to FC7.

In addition, in the figure, Q1 to Q7 are the rotational positions of each storage hole 3.
8, that is, the rotational position of the basket replacement servo motor 51 that drives the core stocker 4. By positioning the core stocker 4 at these rotational positions Q1 to Q7, each storage hole FCI to FC7 is replaced with a core. It can be positioned at the extraction position. Since this position is fixed, there is no need to set it; the setting is input when the injection molding machine is manufactured, and this position is not displayed on the CRT screen.

The core 37 stored in each storage hole 38 in this way
The codes 37-1 to 37-7 are stored in the shared RAM 110.

Figures 9(a), (b), (c), and (d) show that N as a component of the core exchange means is displayed when a core exchange command is input.
It is a flowchart of the process which C device 5 performs.

This flowchart starts when the code of the core to be used is input and a core exchange command is input.

The hand 52 of the core exchange arm 50 has a core transfer position ff1B on the turntable 33 of the core stocker 4 as its home position, and this position is a position where the core exchange arm 50 is retracted from the area of the mold clamping section 2. The hand 52 is always kept open.

The rotational position of each servo motor is determined by the servo circuit 1 of each axis.
05. C for NC via servo interface 104
PUIQi is read and stored in the shared RAM 110.

A core exchange command is input from the CRT/MD I 114 or the program (step 5200).

2MC CPU102 is shared RA via BAC103
Read the molding number of MI 10 and compare it with the set molding number to judge whether the molding operation has finished or not. If it has not been completed, an alarm will be issued to prompt the cancellation of the core replacement command. On the other hand, if the molding operation has been completed, the flag F indicating that the core is replaced is set to 1, and the shared RAM],
The rotational position of the mold clamping motor 14 at 1.0 is read and it is determined whether the mold clamping section 2 is in the mold opening state (step 5
201, 202. 203. 204).

If the mold is not in the open state, the 2MC CPU 102 instructs the NC CPU 101 to raise the first platen 8 to the mold opening position via the shared RAMI 10, and the NC CPU 101 distributes pulses to the mold clamping servo motor 14. When the first platen 8 is moved and the first platen 8 reaches within the in-position width regarding the mold opening position according to a signal from the position detector attached to the mold clamping servo motor 14, a mold opening completion signal is issued. CPU10 for 2MC
2 via the shared RAMI 10 (step S
205).

In addition, as mentioned above, the movement command issued from the 2MC CPU 102 to the servo motor of each axis is sent to the shared RAMI.
10, and drive control of the servo motors for each axis is controlled by the NC CPU10I. Below, in driving the servo motor, the 2MC CPU 102 and the NC C
The exchange of signals of the PU10I and the drive control of the servo motor of the NC CPU10I are the same as the conventional ones, and therefore their explanations 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 $206.
...Figure 10 ■).

When the mold touch completion signal is output from the NC CPU10I, the PMC CPU102 turns off the solenoid 43a (FIG. 5) via the output circuit 112, and locks the core 37a in the upper mother mold 41a. Release (step 5207...Figure 10 ■).

The limit switch is activated by the retracting movement of the lock pin 42a, and when the 2MC CPU 102 confirms the signal from the input circuit 111, the 2MC CPU 102
The CPU 101 is commanded to open the mold. This results in
The first platen 8 connects the upper core 37a to the lower core 37b.
9, move it upward, leaving it joined to the second platen 9.
There is a core 37 in which the upper and lower cores are joined at position A (step 5208...FIG. 10 (■)).

The seventh PMC CPUI02, where the mold opening completion signal reaches,
The solenoid 43b is turned off via the output circuit 1-12, and the lock of the core 37b in the lower mother mold 41b is released (step 8209, Figure 10, ■).

If the lock pin 42b is retracted or confirmed by a signal from a limit switch or the like as above, the PMC CPU 10
2 issues a command to operate the ejector servo motor 54 of the two-stage ejector mechanism 29 because the flag F=1.
It operates up to the stage. As a result, the core 37 is placed in the lower matrix 4.
It is pushed up from 1b, and the hand 52 of the core exchange arm 50 can be held (step 5210...FIG. 10 ■)
.

After obtaining the second stage position completion signal, the PMC CPU 102 issues a command to move the hand 52 from the B position to the A position, drives the core exchange servo motor 51, and controls the core exchange arm 5.
Rotate 0. In this case, since the hand 52 is opened more than 180 degrees, the claws of the hand 52 will not collide with the core 37 (step S21).

Close the hand 52 and hold the core 37 at the flange 40 (Step S2) 2...Figure 10 ■) Reverse the ejector servo motor 51 of the two-stage ejector 29 to initialize the core ejecting rod 53 The tip of the protruding rod 53 is pulled out from the bottom surface of the lower core 37b (step 5213).

Upon receiving a signal indicating that the core ejecting rod 53 has completed its initial position, the PMC CPU 102 issues a command to move the hand 52 from position A to position B, drives the core exchange servo motor 51, and removes the core. The exchange arm 50 is rotated (step 5214...FIG. 10 ■).

When the completion of the B position of the hand 52 is confirmed, the lifting motor 35 is raised until the limit switch H is activated.

At this time, the turntable 33 maintains the position with the core 37 taken out last time, so the core 37 held by the hand 52 and conveyed to position B is moved to the original core storage hole 38.
(steps S2.15, 216).

When the operation of the limit switch H is confirmed from the input circuit 111, the PMC CPtJ 402 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 its position and the hand 52
remains open (step 5217).

Next, the code of the core 37 to be used this time is commanded from the CRT/'MD I 1.14 or the program (step 5218).

Select the core 37 of the code commanded from table Tb of shared RAM 1.10 (select core), core delivery position B
The amount of rotation to the selected core position (Q) is calculated from the reference point and stored in the shared RAMll0.

NC CPU 1-0 that processes this step 5219
1. A series of processing parts in the NC device 5, such as the PMC CPU 102, is a core selection means (step 5219
).

The PMC CPU 102 commands rotation by the amount calculated above, drives the selection servo motor 36, and places the selected core 37 of the core stocker 4 at the delivery position B (step S
220).

When the NC CPU 101 issues a movement completion signal for the table 33, the hand 52 is closed and the selection core 37 is held. In addition, each core 37 on the turntable 33
As shown in FIG. 2, the flange 40 is lifted off the top surface of the table and held in such a state that the claw of the hand 52 can fit into the gap (step 5221).

The PMC CPU 102 instructs the elevating servo motor 35 to lower the elevating plate 32, and waits for the limit switch L to operate (steps 5222, 223).

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 B position to the A position, drives the core exchange servo motor 51, and exchanges the core. Rotate the arm 50. As a result, the selected core 37 is transported to the mounting position IA with respect to the mother die (step 5224...FIG. 10 -).

The two-stage ejector mechanism 29 is operated to the second stage in the same manner as described above, and the transported selected core 37 is supported from below (step 5225...FIG. 10 (■)).

When the second stage position of the core ejecting rod 53 is confirmed by the ejector arm 54, the node 52 is opened, and the core exchange motor 51 is driven to move the core exchange arm 50 to the home position. Returned to position B. Selected core 37
is placed and left on the upper end of the protruding rod 53 (step 8226...FIG. 10 -).

Furthermore, the ejector servo motor 54 is activated,
The protruding rod 53 is at the initial position.

As a result, the selected core 37 is attached to the lower mother mold 41b (step 5227...FIG. 10 -).

When it is confirmed that the core ejecting rod 53 is at the initial position, the PMC CPU 102 energizes the solenoid 43b via the output circuit 112, and locks the lower core 37b with the lock pin 42b (step 5228...・No. 10
Figure ■).

The PMC CPU 102 rotates the core exchange arm 5 from the rotational position of the core exchange servo motor 51 in the shared RAMI 10.
After confirming that the platen 0 is in the retracted position, the first platen 8 is lowered 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 stored in the shared RAM 1 at the time of initial mold thickness adjustment.
l Use what is stored in Q. Furthermore, even if the position is slightly misaligned, it will be corrected to the correct position when the lock pin 42b is press-fitted (step S229).

In the same way as above, the solenoid 43a of the upper mother die 41a is energized this time, and the upper core 37a is locked to the mother die 37a by the lock pin 42a. As a result, the lower core 37b is attached to the lower matrix 41b, and the upper core 37a is attached to the lower matrix 41b.
are respectively fixed to the upper matrix 41a, and the replacement of the cores is completed.

The core exchange arm 50 is at the home position, and the turntable 33 is at the lowered position (step S23).
0).

Then, the flag F=1 indicating the core exchange process is changed to the flag ``-F=O indicating that the core exchange process is not performed, and the process of the core exchange operation is ended (step 5231).

In this way, the used core 37 and the selected core 37 on the turntable 33 are automatically replaced. The selection core 37 is any commanded by the CRT/MD I 114 or from the molding program.

Note that 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 5217 is performed and the process ends.

In addition, if only the newly selected core 37 is to be installed, the process continues from step 5218 to step 5231,
This process has steps 8203 to 205 inserted between step 5219 and step 220.

[Second Embodiment] FIG. 3 shows a second embodiment regarding a vertical injection molding machine.
The movable part 6 is different from the first embodiment described above.

That is, the mold clamping part 2 and the injection part 3 are structurally separated, the guide bar 15 supporting the injection part 3 is fixed to the machine frame 7, and the mold clamping part 2 supports the first platen 8 by fixing it to the machine frame. The second platen 9 is a fixed part of the platen 7, and the second platen 9 is a movable part. Therefore, the upper end of the tie rod 11 is connected to the machine frame 7.
The lower mold 12 is moved upward to perform mold clamping.

The injection molding operation and the core exchange operation are almost the same as in the first embodiment, or in the core exchange process, the operation of the first platen 8 is the operation of the second platen 9, which is in the mold opening position. The position of the second platen 9 in relation to the core stocker 4 is the same as the position of the second platen 9 in the first embodiment.

In this embodiment, the parts that are driven by the mold clamping servo motor 14 are only the second platen 9 and the lower mold 12b, and as in the first embodiment, the entire part including the injection part 3 is driven each time. It is lighter than when moving. However, since the lower mold 12b, which serves as a receiver, is on the movable side, this may be inconvenient when molding or the like.

The above is an example.

The purpose of checking the mold opening state in steps 5204 and 205 is to set the base point of the mold touch in the next step 8206 to be the same as when adjusting the mold thickness, thereby eliminating positional errors during other operations. However, this step may be removed and the first platen 8 (first embodiment) may be directly moved from the current rotational position of the mold clamping servo motor 14 to the mold touch position.

The core 37 is replaceably attached to the mother die 41 of the mold 12 attached to the first platen 8 and the second platen 9, or
If the matrix 41 is rarely replaced (this also means replacing all the cores 37 on the turntable 33), the matrix 41 is omitted and the first and second platens 8, 9 themselves are replaced. The structure and function of each matrix 41 may be provided.

Effects of the invention In the vertical molding machine, prepared cores are automatically replaced and a wide variety of products can be continuously produced.
The setup, effort, and replacement work for core replacement can be omitted.
Production schedules can be efficiently completed. Efficiency is improved especially when each product is produced in small quantities.

[Brief explanation of drawings]

1 is a perspective view, FIG. 2 is a schematic front view partially shown in cross section, FIG. 3 is a schematic front view partially shown in cross section showing another embodiment, and FIG. The figure is a sectional view, Figure 5 is a sectional view, Figure 6 is a plan view, Figure 7 is a 1072 view of the NC device,
FIG. 8 is an example of a stored table, FIGS. 9(a) to 9(d) are a flowchart showing an example of 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, End... First platen, 9...
2nd platen, 29... 2-stage eject mechanism, 32...
... Lifting plate, 33... Turntable, 37... Core, 41... Matrix, 50... Core exchange arm. Figure 9 (a) District 9 (b) Figure 9 (C) Figure 9 (d) Procedural amendment dated November 20, 1990

Claims (1)

[Claims] Equipped with a core stocker that stores a plurality of cores that are assembled into a fixed side and a movable side as a pair, and a mold clamping mechanism that performs mold clamping between the upper platen and lower platen, each of which has a mother die attached to it. a core selection means for selecting a core, a pair of cores being taken out 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 for storage; A core exchanging means, a core ejecting means provided on the lower platen and having a core ejecting rod, a locking means for fixing each of the pair of cores to a corresponding mother die, and a control means. When attaching the core to the mother mold, the control means drives the core selection means to select the core input to the control means, and replaces the selected core with the core. The means is driven to transport the selected cores from the core stocker to the mounting position of the mother mold, and the selected cores are received at the upper end of the core ejecting rod, and then the core ejecting means is deactivated to move the cores downward. The cores are attached to the mother molds on the platen, the movable platen is moved so that the cores are attached to each mother mold, the pair of cores are locked to each mother mold by the core locking means, and the cores are attached to the mother molds. When installing automatically and removing the core from the mother mold, after the pair of cores are joined, the core locking means for the upper core is released and the movable platen is moved to move the space between the mother molds. Then, the core lock for the lower core is released, the cores joined by the core ejecting rod of the core ejecting means are ejected from the lower mother mold, and the pair of cores are removed by the core exchanging means. An automatic core exchange system characterized by holding and transporting cores and automatically storing them in the core stocker.