JP2529915B2 - Method of preventing overheating of mold equipment during suspension of paving block molding. - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is block material molded under for paving
The present invention relates to a method for preventing overheating of a mold device when suspension of a work is interrupted .

[0002]

2. Description of the Related Art As a means for forming a pavement block material, a heater is used to mold the block at a molding temperature that is set to a temperature higher than room temperature (about 50 °) by a heater device. -No. 109671 is a technical means first adopted in the industry as a device having a heater device attached to a pressing die as a utility model device, and its molding effect is highly evaluated.

However, since the molding means for the paving block material presses the mold device with high vibration during the molding process, the auxiliary device such as the heater and the connected power cords are continuously damaged or broken. In addition, since the pressing die is operated while maintaining a constant forming temperature during processing, many problems occur in the temperature treatment during the work, resulting in damage to the overheated die and reduction in work efficiency.

For example, the block material is used as a molding processing means, and the mold device is constantly operated at a load voltage of about 200V to 220V for about 5
When heat-press molding is performed at a mold temperature of 0 ° C and the pressing mold is pressure bonded, the mold temperature is 50 due to the aggregate containing water filled in the receiving mold.
When the block material is removed from the receiving die after crimping, the temperature of the pressing die released from the receiving die is about 50 ° C.
The temperature rises above 0 ° C, and these forming operations are continuously performed with a vertical width of 2 ° C to 3 ° C and showing a temperature change in a wave shape with 20 seconds to 30 seconds as one cycle. However, since the block material molding process is performed by applying high vibration to the mold filled with the aggregate, there is a problem that the mold frame of the mold and the connecting portion of the heater are likely to be broken. Therefore, during work, peeling shorts of the mold device and heater connection part, and when inspecting and checking the processing contents of the aggregate, the worker temporarily turns off the heater switch to prevent overheating of the mold every time. Although it is stopped, sometimes when the heater switch is forgotten to be turned off, the temperature of the pressing mold is 150 ° C-18 °
Raises to 0 ° C. At that time, the aggregate attached to the mold surface may be burned, and the work of peeling and removing it and the damage of the mold surface impede workability and molding efficiency. Also, by attaching a heater to the mold device, it is 4 to 5 m from the power source.
Since connecting with the appropriate connection cord, handling of long cords is a dangerous task when starting and ending the work, storing the mold equipment at the end, rearranging and changing the mold equipment by other block material molding. Since the floor surface is dragged during movement, it may be caught or damaged by other equipment and machinery.

[0005]

At the time of [problem to be solved by the present invention is a block material molding your
As a means for preventing overheating of the mold device , a temperature sensor using a thermocouple has conventionally been attached to the mold device to provide a heater switch.
Although we have prevented accidents due to forgetting to turn off the switch, connecting the cords will cause failure as a molding device with vibration, accidents or deterioration of workability, so a new means method that does not use control means by temperature detection block material formed by
There has been a demand for a means for preventing overheating of the mold device at the time of suspension of suspension during shaping .

[0006]

In order to achieve the above-mentioned object, the present invention prevents overheating of the mold and prevents overheating of the mold when the heater does not stop even when the molding operation of the mold during the molding of the block material stops. When the molding operation is started, the molding temperature that can be immediately processed is set to a preset temperature for heat regulation between the heat retention temperature below the overheat temperature and the molding temperature, and the heater power is automatically set within this fixed time range. ON, O
Stopping during paving block material that is automatically set to molding temperature when FF control or heater supply voltage is reduced and trouble recovers and the mold equipment operates normally.
It is to prevent overheating of the mold device at the time of interruption .

[0007]

[Function] Mold temperature is 50 ° C +-when molding block material
Mold by heating at 2 ° C to 3 ° C. ON when the mold during trouble operation stops interrupted to cycle by a timer within a predetermined time of one minute to 10 minutes for the heat retaining temperature that does not lead to a heating temperature higher than the thus formed temperature OFF control 60 ° C-70 ° C heat retention temperature, or 30
Set to the case where the heat retention temperature is lower than the molding temperature of ° C to 40 ° C, and when the molding operation returns to the normal processing cycle, the heater controller automatically stops and molding can be performed at the molding temperature. Becomes

[0008]

FIG. 1 is a block diagram showing an embodiment of an operation of the present invention when a trouble occurs during molding, and FIG. 2 shows a power source which is required in advance when a trouble occurs and the molding temperature is set to a heat retention temperature equal to or lower than an overheating temperature. In the second embodiment, the temperature adjustment with respect to the molding temperature, that is, the temperature change, is automatically turned on and off by the timer setting based on the time change, and FIG. is there. In the practice of the present invention, as a molding means, when molding is performed at a molding temperature of room temperature or higher, the kneading adjustment of the aggregate to be filled in the mold during the molding process, or the case where the machine power of the mold device is once stopped is normal. In the first embodiment according to FIG. 2, which is distinguished from the processing operation and detected as an accident due to a trouble, the heater power is automatically turned on and off to cycle the overheating of the mold caused by the rise of the molding temperature. It is intended to prevent this. As the set time by the timer processing, the time passage between the heat retention temperature and the molding temperature differs depending on the type of block material, size, model of the mold device, etc., so if it differs from the normal molding cycle, 1 minute to 1
Turn on the heater power within the time range of 0 minutes
The FF control mold temperature is kept at 60 ° C to 70 ° C. FIG. 3 shows a second embodiment in which the heater supply voltage is halved to maintain a temperature of 30 ° C. to 40 ° C. These settings are for enabling molding at the molding temperature easily after recovery from trouble. As an option, this time device may be set as a standard operation of setting for 24 hours by a calendar timer as a forming means of the same block material, or set for one week depending on the work progress. In addition, the temperature of the mold device is illegally operated by adjusting the temperature detection of the thermostat etc. during normal operation and operating by a different time setting, so the cords such as the heater power supply are changed to a structural device separated from the mold device. A mold device that does not require cord treatment by connecting to a power supply and heater cord through a vibration-proof connector. The above is the implementation method according to the present invention, but the heater temperature is maintained by the method of setting the heat retention temperature above or below the molding (manufacturing) temperature or by the method of adjusting the low voltage of the heater even if the die operation is stopped. Regarding the implementation method, the setting is changed at any time by the block forming means.

[0009]

[Effect] Since the present invention is an overheat prevention method that operates when the suspension of the paving block material is interrupted during the molding, the temperature change of the heater device attached to the above-mentioned mold device is set to change with time. Even if you forget to turn off the heater switch, it will turn on and off according to the time width set by the timer.
By controlling or adjusting the supply voltage to a low voltage, it is possible to prevent a mold baking accident due to overheating and a repair and wear of the mold, so that there is an advantage that the function of the entire molding apparatus is improved and the efficiency of block molding is greatly improved. Further, by appropriately setting the heat-retaining temperature, the molding operation after a trouble is swiftly performed, and the efficiency and safety of the work are secured, so that the check check function of the block molding is sufficient, and the block molding with good quality is expected. With regard to the mold device, the cords were separated and connected via a vibration-proof connector, which is effective in improving work efficiency.

[Brief description of drawings]

FIG. 1 is a block diagram showing an operation when a trouble occurs during molding processing of the present invention.

FIG. 2 is a diagram of a first embodiment showing an operation of processing a heat change when a trouble occurs as a heat retention temperature by a timer.

FIG. 3 is a diagram showing a second embodiment according to a heat retention temperature for continuous low voltage adjustment.

[Explanation of symbols]

 c Molding (manufacturing) temperature kc Heat retention temperature uc Overheat temperature

Claims (2)

(57) [Claims] 1. By temperature control, 50 ° C. +-2 ° C.
In a molding heating means for a paving block material, which continuously molds a mold device heated to a molding temperature of 3 ° C. in a fixed cycle, the mold device is interrupted for 1 minute to 10 minutes when the molding operation is stopped. The heat retention temperature is set to 60 ° C. to 70 ° C., which is higher than the molding temperature and does not reach the heating temperature within a predetermined time, and when the molding operation is restored to normal, the heat retention temperature control is stopped. A method for preventing overheating of a die device during suspension of a paving block material forming process, characterized by being automatically set to a forming temperature. 2. By controlling the temperature, 50 ° C. +-2 ° C.
In a molding heating means for a paving block material, which continuously molds a mold device heated to a molding temperature of 3 ° C. in a fixed cycle, the mold device is interrupted for 1 minute to 10 minutes when the molding operation is stopped. The heat retention temperature is set to 30 ° C to 40 ° C, which is lower than the molding temperature within a predetermined time, and when the molding operation returns to normal, the heat retention temperature control is stopped and the molding temperature is automatically changed. A method for preventing heating of a mold device during interruption of suspension during molding of a paving block material.