KR20020011518A - Method for Controlling the Cooling Water Temperature during Mixing - Google Patents

Abstract

PURPOSE: A temperature control method of cooling water during mixing is provided to improve the quality of mixed products by controlling the temperature of cooling water in accordance with the respective mixing steps or requirements during mixing processes using a tire and a mixer. CONSTITUTION: A cooling water temperature controller(9) is connected to a PLC managing the operations of a mixer to be communicated. A computer(11) can communicate with the PLC(10) to control the PLC, and is suitably programmed. In addition, the computer(11) is programmed so that process factors such as material specifications, rotor speeds needed for respective steps, the operation, temperature, time and energy of the mixer and etc. can be input, and the changes of the factors during mixing can be identified through separate output values or a graph.

Description

Method for Controlling the Cooling Water Temperature during Mixing

The present invention relates to a method for controlling the cooling water temperature during rubber compounding in a mixing room for mixing rubber for tires or technical rubber production. The present invention relates to a method of controlling the coolant temperature during blending that allows the cooling water temperature to be differently applied to each of a plurality of procedures or procedures.

The conventional technology related to cooling water temperature control during mixing is not configured to adjust and supply the temperature of cooling water appropriately for each procedure or procedure constituting the mixing step.

Figure 1 shows a typical example of coolant temperature for a rubber blending mixer combining conventional tires and technical rubber. During compounding using a rubber compounding mixer, it is common to increase the temperature of the compound due to a large physical force being loaded on the rubber or accompanied by a chemical reaction. At this time, if the temperature is too high, it causes a defect of the compound or if it is too low, it takes a long time for the compounding to waste energy. Therefore, in order to alleviate or prevent such a phenomenon, the cooling water passes through the cooling water passages inside the mixing chamber 1, the rotor 2, and the discharge door 3 more precisely.

Subsequently, the control of the coolant temperature is achieved by inputting a desired temperature value into the regulator 9, which is connected to the heat exchanger 6a into which steam is introduced or the heat exchanger 6b into which coolant is introduced. The steam control valve 8a or the cooling water control valve 8b is configured to open and close. And the temperature at this time is sensed by the thermocouple 7 inserted into the cooling water temperature tube.

The cooling water passing through the heat exchangers 6a and 6b is supplied to the mixing chamber 1, the rotor 2 and the discharge door 3 of the mixer M by the transport pressures of the supply pumps 5a, 5b and 5c. As it proceeds to the internal cooling water passage, it removes the heat generated during mixing and recovers to the recovery tank (not shown) through the recovery passage (marked with dotted line and the bottom dotted line is the recovery passage of the discharge door). Repeated continuously.

The above-described conventional ones depend on the value input on the regulator 9 in the cooling water temperature control device for removing the heat source in the mixing rubber, and this value is determined by the overall mixing time (in a compounding step, By definition, it is virtually unchanged during the day, month, and month of the compounding process, so it is practically the most important factor, and a number of compounding procedures (rubber ⇒ compounding ⇒ reinforcing agent ⇒ compounding) that constitute one compounding step ⇒ chemical injection ⇒ ---- ⇒ There is a problem that it is impossible to set and provide a temperature suitable for each procedure or procedure of each discharge process.

An object of the present invention is to overcome the disadvantages of the conventional cooling water temperature control device as described above, in detail the required characteristics of the cooling water temperature of each mixing procedure or procedure when mixing using a tire and a technical rubber mixing mixer. It is to provide a cooling water temperature control method during the formulation to improve the quality of the formulation by controlling to meet the best formulation conditions.

1 is an exemplary view showing a conventional cooling water temperature control

2 is an exemplary view showing cooling water temperature control for each compounding procedure according to the present invention.

<Explanation of symbols for the main parts of the drawings>

M: Mixer 1: Mixing Chamber

2: Rotor 3: Discharge Door

4: Ram 5a, 5b, 5c: Cooling water supply pump

6a: Steam supply heat exchanger 6b: Coolant supply heat exchanger

7: Thermocouple 8a, 8b temperature control valve

9: Thermostat 10: PLC (Programmable Logic Controller)

11: computer

Hereinafter, the technical configuration of the present invention in detail.

As shown in Fig. 2, the method for controlling the coolant temperature during the blending of the present invention, the controller for controlling the coolant temperature is connected so as to be able to communicate with the PLC 10 that controls the operation of the mixer. 10) is composed of a computer 11 capable of communicating with each other, having a function of managing the same, and suitably programmed.

In addition, the computer 11 inputs the specifications required for the compounding, that is, the operation of the mixer such as the material specification and the rotor speed and ram pressure required for each procedure, or process factors such as temperature, time, and energy, and these values are changed during the compounding. The program is processed so that it can be identified as a separate output value or graph.

Here, the temperature input of the cooling water suitable for each compounding procedure, which was not possible in the related art, is performed on a computer, and the input values are reached to the controller 9 via the PLC 10 so that the temperature is controlled through the controller 9. By controlling the opening / closing operation of the valves 8a and 8b, the temperature is ultimately made possible according to each procedure.

<Example>

This method can be used where the rubber mixing mixer is operated through a computer and equipped with a mixer coolant temperature control unit. For example, when mixing the raw material rubber or pre-blended rubber, which is the first procedure of rubber compounding, closing the ram 4 and then mixing, if the inside of the mixer M is cold, the mixing time In this procedure, the temperature of the coolant is increased, and carbon black, the second procedure, is added (the ram is opened and the air is sealed). Since the temperature of the cooling water at this time is lower than the previous procedure, and so on.

The present invention, such as by using a tire and technical rubber mixing mixer to control the cooling water temperature to meet the required characteristics of each mixing procedure or blending procedure to ensure the best blending conditions ultimately improve the quality of the blend Has the effect.

Claims (1)

In the cooling water temperature control during the mixing, the cooling water temperature control regulator 9 is connected to the steam temperature regulating valve 8a, the cooling water temperature regulating valve 8b and the thermocouple 7 which can be opened and closed, respectively, and the regulator 9 It is connected to the PLC 10 that controls the operation of the mixer to enable communication, and is composed of a computer 11 capable of mutual communication with the PLC (10) and having a function to manage it properly programmed. Cooling water temperature control method during the mixing, characterized in that.