JP2670167B2 - Injection controller - Google Patents

Description

The present invention relates to an injection control device.

(Prior Art) Conventionally, a molding material that is heated and fluidized in a heating cylinder is injected into a mold by high pressure, cooled and solidified or hardened therein, and then the mold is opened to take out a molded product. In this injection molding machine, two or more mold stations are provided for one injection device, and these mold stations are reciprocally moved to alternately access the injection device. Alternatively, there is a rotary molding machine in which two or more mold stations are arranged on a rotary table and the rotary table is rotated to selectively access the injection device to these mold stations. A molded product can be obtained efficiently by a machine.

A conventional vertical injection molding machine will be described with reference to FIGS. 4 and 5.

FIG. 4 is a state diagram of molding at the first station, and FIG. 5 is a state diagram of molding at the second station.

In the figure, 51 is a first station, 52 is a second station, and each station 51, 52 is a mold,
It has a mold clamping device, and the respective lower molds 51a, 52a are placed and fixed on the first slide table 53 and the second slide table 54. Each of the slide tables 53, 54 has an arrow A (outside) -B (inside) direction and an arrow C (outside) -on a slide base 55 formed in an L shape.
They are slidably arranged in the D (inward) direction. Therefore, the lower mold 51 fixed on each slide table 53, 54
The a and 52a alternately move in the B direction or the D direction to access an injection device (not shown). That is, the first slide table 53 is placed at the injection molding position in FIG. 4, and the second slide table 54 is placed at the injection molding position in FIG.

Reference numeral 57 denotes a fixed platen, and reference numeral 58 denotes a tie bar provided between the fixed platen 57 and a movable platen (not shown). Further, reference numeral 59 is a robot for inserting screws, pins, etc. into the mold and taking out a molded product in the mold when the lower molds 51a, 52a move in the A direction or the C direction. The arm portion 60 of the robot 59 can be turned so as to face the second slide table 54 in FIG. 4 and the slide table 53 in FIG.

(Problems to be Solved by the Invention) However, in the vertical injection molding machine configured as described above, when molding is performed in two or more stations, the injection molding is performed under the same conditions in each station. Machine differences, mold temperature errors, resin flow errors in the mold, etc. cannot be compensated, and the same molded product cannot be reliably molded.

Further, it is not possible to mold the molded products having different injection capacities at each station, and the production efficiency of the molded products is low.

The present invention solves the problems of the above-mentioned conventional vertical injection molding machine, and when molding is performed in two or more stations, mold difference between machines, error of mold temperature, and flow of resin in the mold. Provided is an injection control device that can surely mold the same molded product even when an error or the like occurs, and can increase the production efficiency of molded products when molding molded products having different injection capacities at each station. The purpose is to do.

(Means for Solving the Problem) Therefore, in the injection control device of the present invention, one injection device is used to perform injection to a plurality of molds at a plurality of stations.

Then, a memory that stores the weighing data setting, the injection data setting, and the position data setting that indicates which station the weighing data setting and the injection data setting correspond to, and the injection device that is accessed by each of the stations. When molding the same molded product at each station with the position detector that detects
When molding different molded products at each station, the weighing data settings and injection data settings that are set according to the difference between each mold are set according to the difference in molding conditions between each station. A molding condition changing circuit that reads out the data setting and the injection data setting from the memory based on the detection result of the position detector and outputs them to the metering control valve and the injection control valve, respectively.

(Operation) According to the present invention, as described above, in the injection control device, one injection device is used, and injection is performed for a plurality of molds at a plurality of stations.

Then, a memory that stores the weighing data setting, the injection data setting, and the position data setting that indicates which station the weighing data setting and the injection data setting correspond to, and the injection device that is accessed by each of the stations. When molding the same molded product at each station with the position detector that detects
When molding different molded products at each station, the weighing data settings and injection data settings that are set according to the difference between each mold are set according to the difference in molding conditions between each station. A molding condition changing circuit that reads out the data setting and the injection data setting from the memory based on the detection result of the position detector and outputs them to the metering control valve and the injection control valve, respectively.

According to the injection control device having the above-described configuration, when molding the same molded product at each station, the molding condition changing circuit sets the measurement data setting and the injection data setting set corresponding to the difference between the molds. Based on the detection result of the position detector, it is read from the memory and output to the metering control valve and the injection control valve.

When molding different molded products at each station, the molding condition changing circuit detects the measurement data setting and the injection data setting set corresponding to the difference in the molding condition between each station by the position detector. Based on the result, it is read from the memory and output to the metering control valve and the injection control valve.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings. In addition, about the thing which has the same structure as the control apparatus of the conventional vertical injection molding machine, the description is abbreviate | omitted by attaching | subjecting the same code | symbol.

FIG. 1 is a circuit block diagram of the injection control device of the present invention.

In the figure, 10 is a controller (central processing unit) for performing injection control, in which a memory of the first station 51 is provided.
11, the memory 12 of the second station 52 is provided. Reference numeral 13 is a setting input device such as a keyboard and digital switch connected to the controller 10, and 14 is a display device.

The data of the molding conditions set and input are sent to and stored in the memory 11 of the first station 51 and the memory 12 of the second station 52.

The above data is stored in the memory 11 of the first station 51, the second
It can be independently input to the memory 12 of the station 52, and the data is stored in the memories 11 and 12, and is retrieved by the setting input device 13 as necessary for the weighing data setting, the injection data setting, and the position data setting. And input to the molding condition changing circuit 15. The above-mentioned measurement data is data such as oil motor speed and back pressure for rotating the screw, and the injection data is data such as screw speed and resin pressure. The position data is data indicating which station is selected.

Then, the molding condition changing circuit 15 outputs the position data, the injection data, and the weighing data to the interfaces of the position comparing circuit 16, the injection amplifier 17, and the weighing amplifier 18, respectively. The position comparison circuit 16, the injection amplifier 17, and the metering amplifier 18 are further connected to the respective control targets of the position detector 19, the injection control valve 20, and the metering control valve 21.

The position detector 19 includes first and second stations 51 and 52.
Which one is accessing the injection device and sends it to the position comparison circuit 16. Then, the position comparison circuit 16 determines whether the position data output from the molding condition changing circuit 15 and the detected position data match, and if they match, a position matching signal is sent to the molding condition changing circuit 15. send. And if it turns out that the positions match,
At that time, the injection data and the measurement data are read from the memory 11 (or 12) corresponding to the station accessing the injection device, and sent to the injection control valve 20 and the measurement control valve 21.

In the injection control device having the above configuration, when the controller 10 reads the data set by the setting input device 13 for the molding condition for each station, the signal from the position detector 19 and the position data are compared by the position comparison circuit 16, It is determined which of the first and second stations 51, 52 is accessing the injection device.

Then, at the time of molding in the first station 51, the set data is read from the memory 11 of the first station 51, the position data is sent to the position comparison circuit 16, and the injection amplifier 17 and the measurement amplifier 18 are used. The position detector 19, the injection control valve 20, and the metering control valve 21 are set, and molding is performed under the molding conditions of the first station 51.

Further, at the time of molding in the second station 52, the set data is read from the memory 12 of the second station 52, the position data is sent to the position comparison circuit 16, and the injection amplifier 17 and the measurement amplifier 18 are used. The injection control valve 20 and the metering control valve 21 are set, and molding is performed under the molding conditions of the second station 52.

In this case, the molding conditions stored in the memories 11 and 12 of the first and second stations 51 and 52 are set to the respective stations 51 and 52.
May be all different, or only a part may be different.

Next, the operation of the injection control device of the present invention will be described with reference to FIG.
This will be described with reference to FIG.

FIG. 2 is a time chart showing the operation of the injection control device of the present invention, and FIG. 3 is a flowchart showing the operation of the injection control device of the present invention.

As shown in the figure, the slide device is operated to operate the first and second slide tables 53, 54 (first, second station 51,
When 52) is moved alternately from the outside to the inside, the injection device reads the injection data and the weighing data from the memory 11, (or 12) of the first station 51, (or 52) located inside, and the molding condition Based on mold clamping, injection, holding pressure,
Perform each step of cooling and opening the mold.

When the step operation starts, the first slide table
The lower mold 51a of 53 is moved from the outside to the inside.

Step Here, at the same time when the mold clamping operation is started, a station check is performed as to which station is performing molding.

When the station being molded is the first station 51, the measurement position is sent to the position comparison circuit 16, and the measurement condition of the first station 51 is sent to the injection control valve 20 via the injection amplifier 17 and the measurement amplifier 18. Metering control valve
Set to 21 and weigh.

When the step measurement is completed, the station is checked to see which station is used for molding.

Step: When the molding station is the first station 51, the injection position is sent to the position comparison circuit 16, and the injection condition of the first station 51 is set to the injection control valve 20 via the injection amplifier 17 and the measurement amplifier 18. Metering control valve
Set to 21 to perform injection and pressure retention, then cool and open the mold.

Step The lower die 51a of the first slide table 53 is moved from the inside to the outside.

Step Here, the lower mold of the second slide table 54
Move 52a from outside to inside.

Step A station check is performed in the same manner as the molding at the first station 51, and molding is performed at the second station 52.

The step metering position is sent to the position comparing circuit 16, and the metering condition of the second station 52 is set in the injection control valve 20 and the metering control valve 21 via the injection amplifier 17 and the metering amplifier 18 to perform the metering.

When the step weighing is completed, the station is checked to see which station is used for molding.

Step: The injection position is sent to the position comparison circuit 16, and the injection condition of the second station 52 is set to the injection amplifier 17,
The injection control valve 20 and the measurement control valve 21 are set via the measurement amplifier 18 to perform injection and pressure holding, and further cool and open the mold.

Step The lower die 52a of the second slide table 54 is moved from the inside to the outside.

Steps Steps to steps are executed.

Steps Steps to steps are executed.

It should be noted 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.

For example, in the above embodiment, the control device of the vertical injection molding machine having two stations is described, but the control device having three or more stations can be similarly controlled.

(Effects of the Invention) As described in detail above, according to the present invention, in the injection control device, one injection device is used and injection is performed for a plurality of molds at a plurality of stations. ing.

Then, a memory that stores the weighing data setting, the injection data setting, and the position data setting that indicates which station the weighing data setting and the injection data setting correspond to, and the injection device that is accessed by each of the stations. When molding the same molded product at each station with the position detector that detects
When molding different molded products at each station, the weighing data settings and injection data settings that are set according to the difference between each mold are set according to the difference in molding conditions between each station. A molding condition changing circuit that reads out the data setting and the injection data setting from the memory based on the detection result of the position detector and outputs them to the metering control valve and the injection control valve, respectively.

According to the injection control device having the above configuration, when the same molded product is molded at each station, molding is performed according to the measurement data and the injection data corresponding to the difference between the molds. When molding different molded products in each station, molding is performed in accordance with measurement data and injection data corresponding to the difference in molding conditions between the stations.

Therefore, when molding the same molded product at two or more stations, it is possible to compensate for mold differences, mold temperature errors, resin flow errors in the mold, etc. The product can be reliably formed. In addition, when molding molded products having different injection capacities at the respective stations, the production efficiency of the molded products can be increased.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram of an injection control device of the present invention, and FIG.
FIG. 3 is a time chart showing the operation of the injection control device of the present invention, FIG. 3 is a flow chart showing the operation of the injection control device of the present invention, and FIG. 4 is the control device of the conventional vertical injection molding machine at the first station. FIG. 5 is a view showing a state in which molding is being performed, and FIG. 5 is a view showing a state in which a control device of a conventional vertical injection molding machine is performing molding in a second station. 10 …… Controller, 11,12 …… Memory, 13 …… Setting input device, 14 …… Display device, 16 …… Position comparison circuit, 17 ……
Injection amplifier, 18 ... Weighing amplifier, 19 ... Position detector, 20
...... Injection control valve, 21 ...... Measurement control valve, 51 ...... First station, 52 ...... Second station, 53 ...... First slide table, 54 ...... Second slide table, 55 ...... Slide base, 57 …… Fixed platen, 59 …… Insert robot.

Claims (1)

(57) [Claims] 1. An injection control device which uses one injection device and injects into a plurality of molds in a plurality of stations, comprising: (a) measurement data setting, injection data setting, and measurement data setting and injection data. A memory storing position data settings indicating which station the setting corresponds to; (b) a position detector for detecting which of the stations is being accessed by the injection device; (c) When molding the same molded product at each station, the weighing data settings and injection data settings set in correspondence with the differences between the dies are used. The weighing data setting and the injection data setting that are set in accordance with the difference in the molding conditions of Zui from the memory, the injection control apparatus characterized by having a molding condition change circuit for outputting to the metering valve and injection control valve.