JPH04182099A - Controller for compression molding press - Google Patents

Abstract

PURPOSE:To prevent a defective formed part from generation by controlling the temperatures of upper and lower dies to a prescribed value based on a stored forming condition and performing sequential drive control of the lower die position to a prescribed position. CONSTITUTION:Forming conditions corresponding to plural upper and lower compression forming dies 2,3 are stored in advance in a storage means 21. The position of the lower die 3 is detected by a position detecting means 16. The temperatures of the upper and lower dies are detected by temperature detecting means 5a, 5b. The temperatures of upper and lower dies 2,3 detected by temperature detecting means 5a, 5b based on the forming condition stored in a storage means 21 are controlled by a die temperature controlling means 12 to a prescribed value. The position of lower die 3 detected by the position detecting means 16 based on the forming condition stored in the storage means 21 is drive-controlled sequentially by a press drive controlling means 13. In this way, for example, when the upper and lower dies do not arrive at the set temperature, operation can be contrived so that it is not undergone.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a control device for a compression molding press that controls the temperature of a mold of a compression molding press and controls the press drive.

(Prior Art) As shown in FIG. 4, a compression molding press 1 includes an upper mold 2 and a lower mold 3 that cooperate with each other.

The lower mold 3 is movable and is driven up and down via a ram 4 according to the molding process.

In order to operate this type of compression molding press 1, temperature detectors 5 are installed in the upper mold 2 and the lower mold 3 to detect their respective temperatures.
a to 5b are provided, and their detected temperature signals are guided to mold temperature control means 12. Further, in order to detect a specific position of the press, that is, a specific position of the lower mold 3, a plurality of (11 in the case of the example shown in FIG. 3) dogs 7 are attached to the member 6 that follows the lower mold 3. Accordingly, a plurality of limit switches 8 are provided which operate when a specific dog 7 comes to a specific position, and their operating signals are sent to the press drive control means 13. The press drive control means 13 includes an operation start switch 9 that is operated by the operator when starting the operation, a material charging completion switch 10 that is operated when the material has been charged into the mold, and a press drive control switch 10 that is operated by the operator to start the operation. A molded product removal completion switch 11 is provided which is operated when the product is removed from the mold.

The mold temperature control means 12 controls on/off of heaters (not shown) attached to the upper mold 2 and the lower mold according to the detection results of the temperature detectors 5a and 5b, and sets the upper mold 2 and the lower mold 3 respectively. Works to maintain temperature.

The press drive control means 13 includes a limit switch 8, an operation start switch 9, a material loading completion switch 10, and a molded product removal completion switch 11, which are operated by an operator.
The lower die 3 directly connected to the ram 4 is driven to a predetermined position based on each output signal.

In the compression molding press 1 shown in FIG. 4, first, as shown in FIG.
If there are 11 set positions as shown in 1, the 11 dogs 7 are moved and fixed in advance to each position according to the mold to be molded. The press drive control means 13 drives the lower mold 3 directly connected to the ram 4 to a predetermined position based on each input signal to advance the molding operation.

(Problem to be Solved by the Invention) As mentioned above, for example, when the lower mold 3 has 11 setting positions, in FIG. Adjustment work will also be required to move and fix it to each predetermined position. However, since this adjustment work needs to be performed for each individual mold, it becomes a very complicated work when there are a large number of molds or when molds are frequently replaced.

Furthermore, mold temperature control means 12 and press drive control means 13
There is no interconnection relationship between the two, for example, it is possible to start operation of the compression molding press 1 even if the temperature of the upper mold 2 or lower mold 3 does not reach the set temperature.
In some cases, insufficient temperatures resulted in defective molded products.

The present invention was made in consideration of these problems, and it is possible to easily carry out molding operations without errors even when there are a large number of molds or when molds are frequently replaced. The object of the present invention is to provide a control device for a compression molding press.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a storage means for storing molding conditions corresponding to a plurality of compression molds in advance, and a position detection means for detecting the position of the lower mold. , temperature detection means for detecting the temperature of the upper mold and lower mold, and fC! in the storage means. means for controlling the temperatures of the upper and lower molds to predetermined values detected by the temperature detection means based on the stored molding conditions; The present invention constitutes a control device for a compression molding press, which includes means for sequentially driving and controlling the position of the mold to a predetermined position.

(Function) In the present invention, an external storage means is attached to the arithmetic processing device, and the drive position of the lower mold is stored in advance according to the molding process. The driving position of the lower mold is automatically detected, and the position is automatically controlled sequentially so that the detected position coincides with a preset driving position.

(Example) Hereinafter, a control device for a compression molding press according to the present invention will be described in detail based on an example.

FIG. 1 shows an embodiment of the present invention.

In FIG. 1, a compression molding press 1, an upper mold 2, a lower mold 3,
Ram 4, temperature detectors 5a, 5b, limit switch 8,
The operation start switch 9, the material input completion switch 10, the molded product removal completion switch 11, the mold temperature control means 12, and the press drive control means 13 are the same as those described with the same reference numerals as described with reference to FIG. 4, respectively. . Here, a rack 14 is attached to the lower die 3 directly connected to the ram 4, and a pinion 15 is engaged with the rack 14.

A pulse generator 16 is provided to generate pulses corresponding to the rotation angle of the pinion 15. moreover,
The lower die 3 is provided with a press origin switch 17 for detecting the origin position of the press. The output signals of the pulse generator 16 and the press origin switch 17 are sent to the device input means 19 along with the output signals of the operation start switch 9, the material loading completion switch 10, the molded product removal completion switch 11, and the output signal of the keyboard 18. and is taken into the arithmetic processing unit 20. The arithmetic processing unit 20 includes
An external storage means 21 is attached for storing various molding information for each of the plurality of mold numbers, that is, information necessary for molding, such as press movement position, molding temperature, and time. As this external storage means 21, for example, a floppy disk (FD) is used.
Alternatively, a node disk can be used. The arithmetic processing unit 20 performs arithmetic operations to obtain a control output signal according to each input signal and the contents stored in the external storage means 21, and outputs the resulting control output signal to the mold temperature control means 12 via the device output means 22. and press drive control means 13
The temperature of the upper die 2 and the lower die 3 and the press position (position of the lower die 3) are automatically controlled. Arithmetic processing unit 20
A display device 23 is also connected to the device output means 22, and reference information for the molding operation is displayed to the operator here.

The position of the lower die 3 is calculated by the processing unit 20 based on the output pulses of the pulse generator 16.

Next, the operation of the apparatus shown in FIG. 1 will be explained with reference to the flowchart shown in FIG. 2 and the lower die operation diagram shown in FIG.

It is assumed that the ram 4 of the compression molding press 1 is initially located at the press origin position 1 in FIG. 3.

First, manually input the model number, that is, the unique number of the mold to be used, via the keyboard 18 (Fig. 2, step SL).
. As a result, the corresponding molding information is displayed on the display device 23 (step S2).

The display contents of the display device 23 may be as follows, for example.

1. Model number: 142, Molded product number: F-9352733, Type of molding material: Phenol resin 4, Amount of molding material: 3000g5, Molding temperature ......125℃6, molding time...
...15 minutes 7, molding pressure ...115 kg/
cm28, number of pieces produced: 20 If it is necessary to replace the mold, move the ram 4 to mold origin position 2 in Fig. 3 (move the mold origin) to replace the mold. Exchange (step S3).

Next, by turning on the operation start switch 9, the lower mold 3 directly connected to the ram 4 moves to the material input position 3 (FIG. 3) (steps S4, 5). Therefore, the material displayed on the display device 23 is charged into the lower mold 3, and the material charging completion switch 10 is turned on to confirm this (step S6).

When the completion of material feeding is confirmed, based on the molding information on the display device 23, the lower mold 3 is moved to the pressure holding start and lower mold degassing position 6 via the low speed rise start position 4 and the pressurization rise start position 5. It is moved (step S7). Therefore, a degassing operation is performed a predetermined number of times by adjusting the opening amount between the upper mold 2 and the lower mold 3 between the lower mold 3 and the depressurizing position 7 based on molding information stored in advance. The degassing operation is completed (step S8).

When the degassing operation is completed, the molding process is automatically started (step S9).

Based on the molding information, the arithmetic processing unit 20 manages the molding time and molding temperature (steps SIO to 513). The molding temperature is controlled by the mold temperature control means 12 through the equipment output means 22.
The temperature sensor 5a and the temperature sensor 5 are set to
Temperature control is performed so that the actual mold temperature detected by b matches the set temperature (step Sll, 5
12). While controlling the temperature in this manner, when a predetermined period of time has elapsed, the lower mold 3 is lowered to the molded product take-out position 10 via the high-speed lowering start position 8 and the low-speed lowering start position W9 (step S13.514).

When the lower mold 3 descends to the molded product removal position 10, the molded product is removed, and when the removal is completed, the molded product removal completion switch 1 is activated.
When 1 is operated, the ejector plate (not shown) in the upper mold 2 or the lower mold 3 starts to be returned. In FIG. 3, this operation involves a high-speed rise from the molded product take-out position 10, a low-speed rise start position 4 and a pressurization rise start position 5, to the pressure holding start position 6, and then a high-speed fall from there. This is performed during the period from the low-speed descent start position 11 to the material input position 3 (step S15 516).

When the set number of molded pieces has been molded based on preset molding information, a new mold number for the next molding is input via the keyboard 18 (step Sl).

Further, if the number of molded pieces has not been reached, the program proceeds to step S6 to confirm the completion of material input (step 517).
).

The series of operations is completed by repeating the above operations.

In the case of the above-mentioned molding process, automatic operation is performed by simply inputting the mold number from the keyboard 18 without the complicated movement adjustment of the dog position that was required in the past. It is possible to automate the compression molding presses that we rely on.

The control device of the present invention can be easily attached to an existing manually operated compression molding press, and can be easily automated. Moreover, by incorporating the control device of the present invention from the beginning, it becomes easier to perform one cycle of the molding press.

Note that part or all of the functions of the keyboard in the above embodiments can be replaced by other input means, such as digital switches.

〔Effect of the invention〕

According to the present invention, even when there are many types of molds or when molds are frequently replaced, it is possible to distinguish and organize multiple molds by using a simple input means such as a keyboard. Automated driving can be performed by inputting the serial number for the vehicle. In addition, if the temperature of the upper mold or lower mold has not reached the set temperature, it is possible to prevent the machine from starting operation, so it is possible to avoid the situation where a defective molded product is produced due to insufficient temperature.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a control device for a compression molding press according to the present invention, FIG. 2 is a flowchart for explaining the operation of the control device in FIG. 1, and FIG. The operation diagram of the lower mold, FIG. 4, is a layout diagram showing a conventional compression molding press and its control device. DESCRIPTION OF SYMBOLS 1... Compression molding press, 2... Upper die, 3... Lower die, 4... Ram, 5a... Temperature sensor for upper die, 5b.
・・Temperature detector for lower mold, 9 ・・Operation start switch, 1
0... Material loading completion switch 10. 11... Molded product removal completion switch, 12... Mold temperature control means, 13.
...Press drive control means, 14...Rack, 15...
- Binion, 16... Pulse generator, 17... Press origin switch, 18... Keyboard, 19... Instrument input means, 20... Arithmetic processing unit, 21... External storage means, 22. - Equipment output means, 23... display device. Applicant's agent Mr. Sato

Claims (1)

[Scope of Claims] Storage means for storing molding conditions corresponding to a plurality of compression molds in advance, position detection means for detecting the position of the lower mold, and temperature detection means for detecting the temperature of the upper mold and the lower mold. and means for controlling the temperatures of the upper and lower molds detected by the temperature detection means to predetermined values based on the molding conditions stored in the storage means, and based on the molding conditions stored in the storage means. A control device for a compression molding press, comprising means for sequentially driving and controlling the position of the lower die detected by the position detecting means to a predetermined position.