JPH0426287B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a reaction injection molding machine that performs injection molding using a plurality of liquid plastic raw materials.

[Prior Art] This type of reaction injection molding machine adjusts injection conditions for multiple liquid plastic raw materials, that is, their mixing ratio, injection speed, liquid temperature, etc., depending on the type of molded product.
Injection pressure and other settings are optimally set, and injection molding is performed under these optimal conditions.

In conventional reaction injection molding machines, each setting item of molding conditions is set only to a value of 1, which is optimal for the injection molding to be performed from now on. Therefore, each time the molded product changed, the molding conditions had to be changed by resetting the hydraulic valve opening, various control system dials, and digital switches.

[Problems to be Solved by the Invention] As described above, in the conventional reaction injection molding machine, it is necessary to reset the molding conditions every time the molded product changes, which is troublesome. In reality, it is difficult to frequently change molding conditions, and injection molding is performed using the same molding conditions for multiple types of molds. As a result, the following problems arose.

When molding is performed by attaching a plurality of molds to a rotary table or the like, the molds that can be handled are limited to the same or similar products.

The molding conditions set for each of a large number of molds must be recorded on paper for all setting items in order to be reproduced later.

This invention solves these problems.

[Means for Solving the Problems] The reaction injection molding machine of the present invention has control data corresponding to molding conditions such as the mixing ratio of a plurality of liquid plastic raw materials for each molding type, injection speed, raw material temperature, and injection pressure. a storage unit that stores the control data grouped by molding type; a reading unit that reads control data for each molding type from the storage unit; a display unit that displays the control data read by the reading unit; The molding machine is characterized by having a control device including a control means for controlling each operating section of the molding machine based on the control data read out by the reading means.

[Function] The reaction injection molding machine of the present invention stores in advance a large number of groups of molding conditions for each type of molding, and reads out and sets the molding conditions suitable for the type to be molded as appropriate, so that the molding conditions can be immediately adjusted. Suitable injection molding is carried out under

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

In FIG. 1, 1 is a CPU unit in a control device of a reaction injection molding machine. This CPU unit 1 is operated by an input signal from a keyboard 2 and an input signal from a mold clamping machine 3 in a reaction injection molding machine, and outputs a display signal to a liquid crystal display (LCD) 4. Machine controller 5
The control data used as the molding conditions is output to the machine. Each of these components will be explained separately below.

First, the CPU unit 1 will be explained. This unit 1 is equipped with a molding condition memory 6. The memory 6 stores the molding conditions for each molding type corresponding to the type of mold, and in this example, the molding conditions corresponding to 20 types of molds are numbered "M1 to M20". It has become something to remember. The respective molding conditions are injection conditions for liquid plastic raw materials A and B, and the contents of the control data serving as the injection conditions will be described later. The sequencer 11 is also equipped with a CPU unit 1, a display unit 7, and an I/O unit 8, and communicates with the keyboard 2 and display section 4 through the display unit 7, and performs I/O operations. Through O unit 8,
Data is exchanged between the controller 5 and the mold clamping machine 3. Furthermore, the CPU
The unit 1 is equipped with first and second buffer memories 9 and 10 that read and store one of the molding conditions "M1 to M20" stored in the memory 6. stores one of the molding conditions read out according to an instruction from the keyboard 2 as a displayed molding condition, and the second buffer memory 10 stores one of the molding conditions read out according to an instruction from the keyboard 2 or the mold clamping machine 3. One of these is stored as an actual molding condition. The display molding conditions stored in the first buffer memory 9 become display data for the display unit 4, and the actual molding conditions stored in the second buffer memory 10 become control data for the controller 5.

The keyboard 2 is equipped with various keys as shown in Fig. 4, and by operating these keys, you can set and change molding conditions, read input, and specify molding conditions as described below. I'm starting to be able to do it.

The mold clamping machine 3 can automatically input readout input (injection request) as described later and data specifying molding conditions corresponding to the installed mold.

The display section 4 displays on a liquid crystal display the display molding conditions and the like stored in the buffer memory 9, and there are six display patterns as shown in FIGS. 3a to 3f. The contents of each display pattern will be described later.

The controller 5 has a second buffer memory 10
The injection conditions for the liquid plastic raw materials A and B are set according to the actual molding conditions stored in the actual molding conditions, and each operating section of the reaction injection molding machine is controlled. The details of the control will be described later along with the operation.

Next, the effect will be explained.

First, the molding conditions corresponding to the mold set in the mold clamping machine of the reaction injection molding machine are read from the memory 6. As mentioned above, the memory 6 stores 20 groups of molding conditions "M1 to M20" corresponding to 20 types of molds, and any number from "M1 to M20" is specified. By doing so, the corresponding molding conditions can be read out.

To specify "M1~M20", keyboard 2
(steps SP1, SP2,
There are two ways: SP3) and designation from the mold clamping machine 3 (steps SP4, SP5, SP6 in the figure), and as a result, the latter designation from the mold clamping machine 3 takes priority.

First, when specifying from the keyboard 2, one of the numbers "M1 to M20" is input by operating the keys on the keyboard 2. For example, to specify "M5", use "M, 5, 〓, read, SET"
Enter the key. In this case, keys S6, S8,
Press S18, S10, and S19 in sequence (see Figure 4). Among the key-input data, "M5"
becomes the specified data of the molding conditions (molding conditions (te)), and "read" becomes the read input data, which is sent to the display unit 7 of the sequencer 11.
is input. Due to the read input, the CPU unit 1 advances from step SP1 to step SP2, and the designated data number is "M1~".
M20". If it is not within that range, enter the error routine; if it is within that range, proceed to step SP3. If "M5" is specified, the process naturally advances to step SP3. In this step SP3, the newly specified molding condition "M5" is set in place of the previously specified molding condition. When setting, first read the molding conditions of "M5" from the memory 6, and then set the molding conditions to the first and second buffer memories 9 and 1.
0 and causes the display section 4 to display the contents of the molding conditions stored in the first buffer memory 9 as display molding conditions. After that, if no molding conditions are specified from the mold clamping machine 3, the process continues from step SP4.
Proceed to SP8 and send the molding conditions of "M5" to the controller 5 as actual molding conditions. The controller 5 controls each operating section of the reaction injection molding machine according to the actual molding conditions.

On the other hand, in response to a signal from the mold clamping machine 3, the program proceeds in the order of steps SP4, SP5, SP6, and SP7 shown in FIG. In other words, the mold clamping machine 3 responds to injection requests and "M1~
A signal designating the number "M20" is output, and in response to the former injection request, the process advances from step SP4 to step SP5. In this step SP5, it is determined whether the designated number of the latter molding condition is among "M1 to M20". If it is not within that range, the error routine is entered; if it is within that range, the process advances to step SP6. In step SP6, the newly specified molding conditions are set in place of the previously specified molding conditions. When making the settings, first, the molding condition with the designated number is read out from the memory 6, stored in the buffer memory 10, and then sent to the controller 5 as the actual molding condition. The controller 5 controls the reaction injection molding machine according to the actual molding conditions.

By either of the above two methods, one of the molding conditions "M1 to M20" is designated and becomes the actual molding condition. The actual molding conditions are set in either step SP8 or step SP7. As a result, the settings made in the latter step SP7 will take precedence. Therefore, if the molding conditions specified from the keyboard 2 and the molding conditions specified from the mold clamping machine 3 are different, the latter specified molding conditions will be set as the actual molding conditions, and the former specified molding conditions will be displayed. It will be displayed in Section 4.

Therefore, in that case, the molding conditions displayed by the display section 4 and the actual molding conditions are different. Usually they match.

In this way, arbitrary molding conditions are read out at an arbitrary timing, and suitable injection molding is performed under those molding conditions.

Next, the specific contents of the molding conditions read from the memory 6 will be explained. Since the contents of the molding conditions will be displayed on the display section 4, the description will be based on the displayed contents.

There are six display patterns on the display section 4 as shown in FIGS. 3a to 3f. The illustrated example shows six display patterns when the molding conditions of "M20" are set, and the two screens P1 and P2 shown in a and b of the figure are the display screens of the data of the molding conditions. Other screens P3 to P6 of c to f are
These are a screen for setting various operating conditions as will be described later, and a screen for monitoring. These six screens P1 to P6 are sequentially switched by pressing the screen key S5 on the keyboard 2.

On screen P1 in Figure a, “〓
"M20" indicates that the molding condition number is "M20", and D1, D3, D5 are the set speeds of the A cylinder for liquid plastic raw material A, D2,
D4 is the position of the shift change point of A cylinder, D6 is A
The set value of the liquid injection start pressure, D7, is the set value of the injection start pressure of the plastic raw material B liquid. In addition, on screen P2 in Figure b, D1 is the set value of the injection stroke, D2 is the speed ratio of A cylinder for A liquid and B cylinder for B liquid, and D3 is the actual set pressure of the pressure of A liquid and B liquid. D4 is the set value of the abnormal pressure that is the standard for stopping the operation and generating an alarm when the pressure is reached, and D4 is used to start the actual injection after the set time has elapsed after the A and B liquids reach the injection start pressure. This is the setting value of the injection delay time.

The data on these screens P1 and P2 are set for each of the molding conditions "M1 to M20". These data can be set and changed by key operations on the keyboard 2 shown in FIG.

Further, screens P3 and P4 in FIGS. 3 and 3 are screens for setting various operating conditions, respectively. On screen P3, D1 and D2 are selection data for low pressure circulation and high pressure circulation during automatic operation, and setting "1" is ON.
The setting "0" means OFF. Also,
On the same screen P3, D3 is the selection data of the monitoring alarm for one cycle time during automatic operation, and when the setting is "1", the operation will be stopped and the screen will be displayed if one cycle is not completed within the preset time. A warning will be displayed. On the other hand, on screen P4, D1 is the set value of the backward speed of cylinder A and cylinder B;
2 to D7 are time setting values of the timer, respectively. Naturally, the data on these screens P3 and P4 can be set and changed by key operations on the keyboard 2 shown in FIG.

In addition, screen P5 in figure e is a monitor screen for displaying the molding results under each molding condition, and screen P5 in figure f
6 is a monitor screen for displaying the current operation of the injection machine.

[Effects of the Invention] As explained above, the reaction injection molding machine of the present invention stores a large number of groups of molding conditions for each molded product in advance, and reads out and sets suitable molding conditions during actual molding work. Since the injection molding device is controlled by a control device configured to do this, it is possible to set arbitrary molding conditions at an arbitrary timing and carry out suitable injection molding under the set molding conditions. Therefore, no matter what type of mold is installed in the mold clamping machine, as long as the corresponding molding conditions are determined, injection molding corresponding to that mold should be carried out immediately. I can do it. Furthermore, since the control data corresponding to the molding conditions can be displayed on the display device at any time, there is no need to memorize the contents of the control data each time or record them in a memo pad. In addition, the operator can check the contents of the control data displayed on the display device and confirm whether it is the control data he or she desires, thereby avoiding unexpected movements of the operating parts. It's safe. Furthermore, when creating control data for a new molded product, you can easily create new control data by displaying the control data of other molded products similar to the molded product on the display and changing only the necessary parts. can do.

[Brief explanation of drawings]

The drawings are diagrams for explaining one embodiment of the present invention. Fig. 1 is a block diagram of the main part, Fig. 2 is a flowchart for explaining the operation, and Fig. 3 is a diagram of the display pattern of the display section. Explanatory diagram, FIG. 4 is an explanatory diagram of the keyboard. 1...CPU unit, 2...Keyboard, 3
... Mold clamping machine, 4 ... Display section, 5 ... Controller, 6 ... Memory, 7 ... Display unit, 8 ... I/O unit, 9, 10 ... Buffer memory, 11 ... Sequencer.

Claims (1)

[Scope of Claims] A storage unit that stores control data corresponding to molding conditions such as the mixing ratio of a plurality of liquid plastic raw materials for each molding type, injection speed, raw material temperature, injection pressure, etc., grouped for each molding type; , a readout unit that reads control data for each molded product from the storage unit; a display device that displays the control data read out by the readout unit; and a display device that displays the control data read out by the readout unit. A reaction injection molding machine characterized in that it has a control device comprising control means for controlling each operating part of the molding machine.