JPH081057Y2 - Vertical injection molding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a vertical injection molding machine.

(Prior Art) Conventionally, in an injection molding machine, various actuators such as a mold clamping device, an ejector, and peripheral devices are operated by a hydraulic circuit, and oil discharged from a pump is supplied to each actuator. There is.

Then, in the case of a hydraulic circuit of a vertical injection molding machine in which two or more slides attached with molds are arranged and the slides are reciprocally moved to alternately access the injection unit, the power match method is used. Since the hydraulic pressures required to perform mold clamping, ejection, mold opening, take-out, insert, etc. are different, valves are provided for each actuator to operate individually and not to operate at the same time. .

FIG. 2 is an operation flowchart of the conventional vertical injection molding machine, and FIG. 3 is a movement mode diagram of the conventional vertical injection molding machine.

The figure shows the operation of each actuator in each process in one cycle, namely, table movement (right row), mold clamping, nozzle advancement, injection / holding pressure, cooling (metering and nozzle retraction), mold opening, table movement (left row). ), Left ejector operation, right ejector operation, pause, mold open / close state, table moving state, table moving solenoid (a, b) on / off, left ejector state, right ejector state and screw drive Indicates the motor status.

Step T1 When the cycle start signal from the insert machine is input, the table moving solenoid b turns on,
The slide right row is performed, and the slide (table) moves to the right. In this case, the slide moves at speed V for time T25.
At 72, then moved at speed V73.

Step T2 When the slide reaches a predetermined position, the injection unit advances and descends.

Step T3 After the completion of the advance of the injection unit, the mold clamping device performs the mold clamping. In this case, the mold clamping positions S31, S
The mold is clamped through 32 and S33.

Step T4 Injection is performed after completion of mold clamping.

Step T5 Hold pressure after completion of injection.

Step TT1 Enter the cooling process.

Step TT2 Pause after cooling.

Step T6 If the injection unit is retracted before entering the weighing process, the process proceeds to step T7, and if the advanced state is maintained, the process proceeds to step T8.

Step T7 The injection unit retracts.

Step T8 The screw drive motor is rotated and the screw in the heating cylinder is retracted to perform measurement.

Step T9 When the weighing is completed, the screw will
Go to and pause. On the other hand, in the injection unit, the process proceeds to step T10 when the backward movement is performed, and the process proceeds to step T11 when the forward movement state is maintained.

Step T10 The injection unit retracts.

Step T11 Mold opening is performed. In this case, the mold clamping position S41,
The mold is clamped through S42.

Step T12 When the ejector ejecting / returning signal for the runner is inputted, the ejector ejecting / returning for the runner is performed by the upper ejector for the time T50, and the runner is taken out from the runner ejector.

Step T13: The table moving solenoid a is turned on, the slide left row is performed, and the slide (table) moves to the left. In this case, the slide is moved at speed V72 for time T25 and then at speed V73.

Step T14 When the product ejector eject / return signal is input, the product ejector eject / return is performed by the left ejector for the time T26, and the product is taken out from the mold.

Step T15 Insert machine places the insert in the lower mold.

(Problems to be Solved by the Invention) However, in the above-mentioned conventional vertical injection molding machine, since the hydraulic circuit is of the power match type, the respective actuators cannot be operated simultaneously.

It is necessary to operate the peripheral equipment after all the operations of the injection molding machine are completed, in which case the cycle time until the molding is completed becomes long.

The present invention solves the problems of the above-mentioned conventional vertical injection molding machine, and by operating the actuators of the hydraulic circuit in parallel, it is possible to shorten the cycle time until the completion of molding. An object is to provide an injection molding machine.

(Means for Solving the Problem) Therefore, in the vertical injection molding machine of the present invention, means for moving the slide on which the mold is attached to the left and right, and means for moving the injection unit forward and backward with respect to the mold When,
Peripheral equipment, for example, an insert machine for placing an insert in a mold, and a means for taking a product by receiving a signal from the peripheral and then operating the first ejector after opening the mold, and a means for taking the product In response to a signal from the runner take-out machine, the second ejector is operated to perform the runner removal, and the runner removal and the operation by the peripheral device are performed at the same time.

(Operation) According to the present invention, it has means for moving the slide on which the mold is attached as described above to the left and right, and means for moving the injection unit forward and backward with respect to the mold. Is moved to a position opposite to and injection is performed.

After opening the mold, the first ejector is operated by receiving a signal from peripheral equipment such as an insert machine to perform product removal, and then the second ejector is operated by receiving a signal from the runner ejecting machine to perform runner removal. Be seen. At this time, the runner removal and the insert by the insert machine are simultaneously performed.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

In the case of the vertical injection molding machine, the ejector for removing the runner and the ejector for removing the product can be arranged vertically, and the timings of both ejectors can be set separately. Therefore, by making the operation of the upper ejector, that is, the runner removal the last step, the peripheral equipment such as the insert machine and the molding machine can be operated at the same time.

FIG. 1 is an operation flowchart of the vertical injection molding machine of the present invention.

Step S1 When a cycle start signal is input from the insert machine, slide right row is performed and the slide moves to the right.

Step S2 When the slide reaches a predetermined position, the injection unit advances and descends.

Step S3 After the advance of the injection unit is completed, the mold clamping device performs mold clamping.

Step S4 Injection is performed after completion of mold clamping.

Step S5 Hold pressure after completion of injection.

Step SS1 Enter the cooling process.

Step SS2 Pause after cooling is completed.

Step S6 If the injection unit is retracted before entering the weighing process, the process proceeds to step S7, and if it is maintained in the advanced state, the process proceeds to step S8.

Step S7 The unit retreats.

Step S8: The screw in the heating cylinder is retracted to perform the measurement.

Step S9 When weighing is completed, the screw is
Go to and pause. On the other hand, in the injection unit, the process proceeds to step S10 when retracting, and to step S11 when maintaining the forward state.

Step S10 The injection unit retracts.

Step S11 Mold opening is performed.

Step S12 The slide is moved to the left, and the slide moves to the left.

Step S13 When a product ejector eject / return signal is input from the insert machine, the product ejector eject / return is performed by the left ejector, and the product is taken out from the mold.

Step S14 When the ejector ejecting / returning signal for the runner enters from the runner ejector, the upper ejector ejects / returns the ejector for the runner, and the runner is taken out from the runner ejecting machine.

Step T15 Place the insert in the lower mold while the inserter is performing the ejector operation for the runner of the molding machine.

Note that the present invention is not limited to the above embodiment, and various modifications are possible based on the gist of the present invention.
They are not excluded from the scope of the present invention.

(Effect of the Invention) As described in detail above, according to the present invention, means for moving the slide on which the mold is attached to the left and right,
It has means for moving the injection unit forward and backward with respect to the mold, and the slide is moved to a position facing the injection unit to perform injection. After the mold is opened, the first ejector operates by receiving a signal from peripheral equipment such as an insert machine, product removal is performed, and then the second ejector operates by receiving a signal from the runner ejecting machine and the runner removal is performed. Done. At this time, the runner removal and the insert by the insert machine are simultaneously performed.

Therefore, the peripheral equipment and the molding machine operate simultaneously, and the cycle time until the product is completed is shortened.

[Brief description of drawings]

FIG. 1 is an operation flowchart of the vertical injection molding machine of the present invention, FIG. 2 is an operation flowchart of a conventional vertical injection molding machine, and FIG. 3 is a movement mode diagram of the conventional vertical injection molding machine.

Claims (1)

[Scope of utility model registration request] Claims: (a) a means for moving a slide on which a mold is attached to the left and right; (b) a means for moving an injection unit forward and backward with respect to the mold; and (c) peripheral equipment for accessing a molding machine. And (d) after the mold is opened, the first ejector is operated by receiving a signal from the peripheral device, and (e) after the product is removed, a signal is received from the runner ejector. A vertical injection molding machine comprising: a means for operating the second ejector to remove the runner; and (f) means for simultaneously performing the removal of the runner and the operation of the peripheral equipment.