JP3443138B2 - Molding machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a plastic molding machine, such as an injection molding machine or a hollow molding machine, which heats a resin material by an electric heat load (heater) and uses it automatically at the work start time of the working day. Automatic heater input device that raises the temperature of the heater to a specified temperature, especially when the work start time comes, even if the molding machine controller is not connected to the commercial power supply. those concerning the molding machine can.

[0002]

2. Description of the Related Art Conventionally, a heater power source for an injection molding machine is
Those equipped with a calendar timer that automatically turns on the heating cylinder at a predetermined time before going to work on the work day to raise the temperature to a predetermined temperature in advance and allows the molding work to start immediately when the work starts there were. It is called a "calendar timer" because it is switched on a certain number of hours before the start time on normal work days and not on holidays according to the work schedule (work calendar).
This is because it has a function of setting whether or not to turn on the switch and setting the switch-on time collectively for about a week. However, even if the "Calendar timer" was set on the previous day, if there is a power failure accident before the work start time, the timer device during the timing work will be turned off and restart will be started from the power recovery time. since there are many, even try to go to work to work day, become a trouble such as the heater is turned on has not yet been done, it had to be re-set manually.

Further, in order to raise the temperature of the heating cylinder in advance by the calendar timer by the work start time, in order to secure the driving power source of the calendar timer itself and the heater power source of the molding machine, from the time when the calendar timer is started. For a long time, the main controller for controlling the machine had to be kept in a state in which the voltage of the commercial power source was applied. Also in the timing time for the main controller transformer remains a voltage is applied, nothing occurs transformer iron loss to not work, large power loss when the molding machine number is increased There was a drawback against energy saving.

[0004]

[0008] The present invention has been made in view of the drawbacks of such a conventional example, problems to be solved by the present invention, there is power failure the commercial power source during calendar timer operation Be able to operate without any abnormalities. This is to eliminate the power loss caused by keeping the voltage of the commercial power supply applied to the main control device for the calendar timer function.

[0005]

Means for Solving the Problems] <br/> first invention in the molding machine of the present invention has a "calendar timer (12), a commercial power supply
Driven by (7), the main controller (6) that controls the entire machine,
Connected to the main controller (6) and controls the calendar timer (12)
The main controller (6) and supply commercial power.
By connecting or disconnecting the source (7)
On the electric heating load location, the sub-control apparatus having a function to off (13) is a separately prepared commercial power (7), the sub-control unit and a secondary power supply (1 6) for operating (13) all SANYO characterized by comprising a "thing, the second invention," Sa relates first invention
The control unit (13) sets and starts the calendar timer (12).
And control the time-up ”. Well
The third invention relates to the first or second invention, in which "sub-control
The device (13) has a function to restart the calendar timer (12).
Power supply connected to the main control unit (6) via a relay (MR)
(7) is cut off ” , the fourth invention is the first
Regarding any one of the inventions 1 to 3, "Electrical load is heating
Da (4), mold temperature controller (9) and molded product Annelin
It is installed in the tank (8) ”. And
The fifth invention is characterized in that "the secondary power source ( 16 ) is composed of a solar panel (17) and a storage battery (18)" with respect to any one of the first to fourth inventions .

[0006]

[Action] mosquitoes Les <br/> Ndataima of the main control device connected to a commercial power source (7) (6) (12), the main controller after a predetermined set time
Set to turn on the electric load (6), the sub-control unit which operates at the commercial power source and a separate secondary power source (16) (13) is connected to the main control unit (6), the sub control unit When the calendar timer (12) is operated by the timing (13), the commercial power supply (7) is disconnected from the main controller (6).
It Then, the point when the timing operation by the calendar timer (12) has timed, the commercial power source of the main control unit (6)
(7) is connected to the main control unit (6) and the electric heating load is turned on
Therefore , the heater can be automatically heated to a predetermined temperature by the time the work is started.

As described above, since the calendar timer (12) is operated by the secondary power source (16), the timing operation of the calendar timer (12) may be interrupted even if the commercial power source is turned off due to a power failure or the like. Absent. Further , during the timing operation, the main control unit (6) is disconnected from the commercial power supply (7), so there is no iron loss in the power supply transformer (15) of the main control unit (6) (that is,
Saves energy by eliminating the need for standby power .

[0008]

EXAMPLES Examples of the electric heat load charging device according to the present invention will be described below.
An embodiment of the injection molding machine will be described in detail with reference to the drawings. The heating load of the injection molding machine will be described as the electric heat load. FIG. 1 is an explanatory view of essential parts of an injection molding machine according to an embodiment of the apparatus of the present invention, and FIG. 2 shows the working time of a calendar timer (12) on the horizontal axis and the operation of a relay (MR) on the vertical axis. FIG.

In FIG. 1, (1) is an injection molding machine, (2) is a mold opening / closing device, (3) is an injection unit , and (4) is a heating cylinder.
An electric heater (5) is wound around the heating cylinder (4). The main control unit (6) of the injection molding machine (1) is connected to the commercial power supply (7) through the A contact of the relay (MR), and controls the entire machine, that is, the electric motor for the hydraulic pump, the mold thickness adjustment. In many cases, it also controls the peripheral equipment such as the electric motor for heating, the electric heater (5) for the heating cylinder, the sequence control device, the hopper loader for the raw material, the product unloading machine, the conveyor, and the electric heater for the product annealing tank. Also, the mold temperature control is often of the hot water circulation system type, and is usually controlled by a separate control device, but in many cases it is indirectly controlled by a signal from the main control device (6). It was

The electric heater (5) of the heating cylinder (4) starts each work in anticipation of the required temperature rise time of the heating cylinder (4) by the calendar timer (12) installed in the main controller (6). It can be turned on automatically before the time.

The sub-control unit (13) is installed in a part of it adjacent to the main control unit (6) and is connected so as to be able to switch on the electric heating load of the main control unit (6). There is. Since the sub-control unit (13) and the main control unit (6) are connected so as to share the control memory (14), the electric load of the main control unit (6) is changed to the calendar timer (12). It can be turned on / off from the sub control unit (13) via the. The sub controller (13) is powered by the commercial power source (7).
It is a secondary power source (16) prepared separately from the secondary power source (1
6) is composed of a solar panel (17) and a storage battery (18), and is attached to the sub control unit (13).

The calendar timer (12) is installed in the main controller (6) and can be operated by the sub-controller (13) as described above. An electric heat load as a load of the calendar timer (12), for example, an electric heater (5) of the heating cylinder (4)
There is. In addition, a contact (1 that turns the relay MR on and off)
There is 9). The coil (20) of this relay (MR) is an on / off contact.
It is connected in parallel to the commercial power source (7) via (19), and the commercial power source (7) is applied to the main controller (6) via the A contact (21) of the relay (MR). Contacts (19) and therefore relays (M
The coil 20 of R) is turned on and off by the calendar timer 12, and its operation will be described with reference to FIG. There are generally three types of timers, that is, when the power is on, the power is on, the timing is in operation, the set timing time is over, that is, the time is up. The calendar timer (12) of the present invention is also always on when the power is not turned on,
The circuit is configured so that it is turned off when the power is turned on and the timing is operating, and is turned on again after the time is up.

The operation of the embodiment of the present invention configured as above will be described. (1) Prepare the main controller (6) via the A contact of the relay (MR) for commercial power
Connect to (7). Relay (MR) is connected as a load Karen Data timer (12), so Karen Data timer (12) is always operated by the secondary power source (16), the coil (20) of the relay (MR) also As shown in Fig. 2, it is turned on and the A contact is also turned on.
(7) is applied, and the injection molding machine (1) and peripheral equipment are operated.

[0014] (2) Setting of Karen Data timer (12) Karen Data timer (12) in accordance with the work schedule, setting the input time of the heating cylinder heater of each working day. Set for one week at a time, including regular holidays. It goes without saying that this setting is set in time for the work start time of each work day in consideration of the required temperature rise time of the heating cylinder (4).

When the work of the calendar timer (12) is started, the main controller (6) is operated by the operation switch (1).
Although it is turned off by 1), the calendar timer 12 continues to operate by the secondary power source 16 composed of the solar panel 17 and the storage battery 18.

(4) Operation of relay (MR) When the calendar timer (12) starts timing operation, the contact
(19) is turned off, and the main controller (6) is disconnected from the commercial power supply (7) by the contact A of the coil (20) of the relay (MR). Therefore, the iron loss of the transformer as in the case where the main controller (6) is kept connected to the commercial power source (7) for operating the calendar timer as in the conventional case does not occur, resulting in energy saving.

(5) Operation of secondary power source The timing operation of the calendar timer (12) is often at night, but the secondary power source (16) is a solar panel (17) and a storage battery.
Since it is composed of (18) and, solar panels (1
Since the storage battery is charged with the electricity generated in 7), the secondary power supply (16) operates without problems at night.

(6) Calendar timer (12) Time-up When the calendar timer (12) times up at the set time of the working day, the coil (20) of the relay (MR) is turned on and the relay (MR) A The contact (21) is also turned on, the main control unit (6) is reconnected to the commercial power supply (7), and the electric load switch of the main control unit (6) is turned on. The time-up time of the calendar timer is set so as to be in time for the work start time of each work day in anticipation of the required temperature rise time of the heating cylinder (4), so the heating cylinder (4 In (), the temperature rise is completed, and the molding operation can be started immediately.

Although the heating cylinder (4) of the injection molding machine has been described as an example of the load, the load may be, for example, a mold temperature controller (9) and an annealing tank (8) for the molded product.
It goes without saying that all the things that require waiting until the proper temperature is reached are included if the switch is turned on at the start of work.

[0020]

As described above, the present invention is driven by a commercial power source.
Separately from the main controller,
It controls the operation of Ndataima, electricity to the main control unit
For connecting or disconnecting commercial power supply that supplies power
Therefore, the function to turn on / off the electric heating load of the main controller
With the sub-control unit you have, activate the sub-control unit
Since and a secondary power source, different from the traditional calendar timer to be used while connected to the calendar timer to the commercial power supply
Ri, in calendar timer is operating, the transformer of the main control unit for the voltage of the commercial power supply is not applied, it is possible to eliminate the iron loss of the transformer. Therefore, including the transformer
If the number of devices controlled by the main controller increases,
Although the power loss due to the iron loss of the transformer for a long time becomes considerably large, the great energy saving effect can be obtained by adopting the present invention.

[0021] Then, the secondary power source for operating the sub control unit, since they are prepared separately from the commercial power supply, the even if power failure in the commercial power source during calendar timer operation 2
Sub-control unit according to the following power supply can be operated without any abnormality, that-out <br/> in it prevent accidents due to power failure of the commercial power supply.

[Brief description of drawings]

FIG. 1 is a block diagram of an injection molding machine and a controller according to an embodiment of the apparatus of the present invention.

FIG. 2 is an operation explanatory diagram in which the horizontal axis represents the operation time of the calendar timer of the present invention, and the vertical axis represents the operation of the relay.

[Explanation of symbols]

4 ・ Heating cylinder 5 ・ ・ Electric heater 6 ・ ・ Main controller 7 ・ ・ Commercial power supply 12 ・ ・ Calendar timer 13 ・ ・ Sub controller 1 6・ ・ Secondary power supply 17 ・ ・ Solar panel 18 ・ ・ Storage battery 19 ・ ・.Contacts for turning the relay MR on and off

Claims (5)

(57) [Claims] 1. A main controller having a calendar timer, which is driven by a commercial power source and controls the entire machine, and an operation of the calendar timer, which is connected to the main controller.
And to supply power to the main controller.
By connecting or disconnecting the commercial power source, the main control unit
On the electric heating load location, the sub-control unit having a function for turning off, the commercial power source and separately prepared, a molding machine, characterized in that a secondary power source for operating the sub-control unit. 2. The sub controller is the calendar tie.
It controls the settings, startup and time-up of
The molding machine according to claim 1, which is used as a characteristic. 3. The sub-control device includes a calendar timer.
When activated, it is connected to the main controller via a relay.
2. The commercial power supply is cut off, or
The molding machine according to item 2. 4. The heating load of a heating cylinder, a mold,
Installed in the temperature controller and molded product annealing bath
4. The method according to any one of claims 1 to 3, characterized in that
Molding machine. Wherein said secondary power source, according to claim 1 to 4 noise, characterized in that it is composed of a solar panel and battery
The molding machine described there .