KR102020576B1 - Manufacturing apparatus of two-type liquid silicone and operation method therrof - Google Patents

Abstract

Disclosed is a control method of a two-component liquid silicone manufacturing apparatus for controlling the input amount of the main material and the submaterial in real time so that a desired mixing ratio of the main material and the submaterial is kept constant. To this end, the first digital flowmeter measures the first flow rate information of the main material transferred from the main material storage tank to the mixing block through the first liquid transfer device, and is transferred from the subsidiary material storage tank to the mixing block through the second liquid transfer device. A flow rate information collecting step of measuring a second flow rate information of the subsidiary material by a second digital flow meter, and a control unit connected to the first digital flow meter and the second digital flow meter collected from the first digital flow meter and the second digital flow meter; A deviation analysis step of analyzing the flow rate information and the second flow rate information by comparing the predetermined mixing ratio with the predetermined flow rate, and a deviation between the first liquid transfer device and the second liquid transfer device so that the control unit reduces the deviation; Provided is a control method of a two-component liquid silicone manufacturing apparatus comprising a compensation step of controlling the operation of the generated liquid transfer device. The. According to the present invention, since the mixing ratio of the main material and the subsidiary material constituting the two-liquid liquid silicone in real time through a flow meter during the production of the two-liquid liquid silicone, the desired mixing ratio can be controlled within an error range of ± 0.5%. Can be.

Description

MANUFACTURING APPARATUS OF TWO-TYPE LIQUID SILICONE AND OPERATION METHOD THERROF}

The present invention relates to an apparatus for manufacturing a two-component liquid silicone composed of a main material and a subsidiary material and a method of operating the same. More particularly, the input amount of the main material and the subsidiary material may be controlled in real time to maintain a constant mixing ratio of the main material and the subsidiary material. It relates to a two-component liquid silicone manufacturing apparatus and a method of operating the same.

One of the materials that is attracting attention due to the various applications of the material industry product group, silicon is a material that is used in various industries throughout the industry due to the physical and chemical properties of the material itself.

Among them, liquid silicone rubber composed of two-part type has been used only in the necessary places such as infant goods, medical equipment, aerospace, etc. developed due to high raw material cost, but due to the development of industry and the increase in the use of liquid silicone rubber, It has been lowered so much that the applications of electric and electronics, machinery, automobiles, building engineering, cosmetics, and food industry are increasing.

The two-component liquid silicone is composed of the A main material and the B material, and when the main material and the material are mixed in a ratio of 1: 1, the physical and chemical properties of the material can be obtained completely. Therefore, in the industry dealing with the two-component liquid silicone, a lot of research and development is in progress to maintain the mixing ratio.

Specifically, the conventional two-component liquid-silicon manufacturing apparatus is pumped and conveyed by the pressure pump 10, the main material and the subsidiary material are pneumatically or hydraulically operated as shown in Figure 1, are combined in the mixing block 20, the stirrer 30 It is a system having a structure that is mixed while passing through) and discharged to the mold for molding by the injection device or injection device 40 of various forms at the end of the system.

The two-component liquid-silicon manufacturing apparatus operates a pressure pump to transfer the liquid silicone. In the past, a hydraulic pressure pump was used, but due to the oil from the hydraulic pressure pump, a pneumatic pressure pump has recently been used. .

In addition, the method of starting the pressure pump of the two-component liquid-silicon manufacturing apparatus is a single pressure method of starting a pump at the same pressure using one hydraulic and pneumatic pump, and two hydraulic and pneumatic pumps to pump main materials and subsidiary materials, respectively. There is a multiple pressure method to start the engine.

The single pressure method has the advantage of low production cost and maintenance cost of the pressure pump, but since the viscosity of the main material and the subsidiary material of the two-component liquid silicone is different, the single pressure method in which the pumping plate of the pump is operated in one direction has a viscosity As the same pressure is applied to each of the different materials, there is a disadvantage in that a difference occurs in the liquid silicon pumping transfer amount of each of the main material and the submaterial.

The plural pressure method has the advantage that the pump pressure can be individually controlled for each of the main material and the submaterial, but the viscosity of the main material and the submaterial is different, and the pumping pressure generated when the pumping plate of the pump operates in different directions also varies. As a result, there is a disadvantage in that a difference occurs in the pumping transfer amount of the main material and the subsidiary material.

As such, the finished product made through the conventional two-component liquid-silicon manufacturing apparatus is a product that is difficult to maintain a constant mixing ratio of the raw material A, B as a product that could not guarantee a uniform physical and chemical quality. In addition, the conventional two-component liquid-silicon manufacturing apparatus does not have a structure capable of confirming the mixing ratio of the liquid silicone A and B raw materials, and the mixing ratio of the two-liquid liquid silicone is not provided because no separate configuration for controlling the mixing ratio is provided. There is a problem that cannot be guaranteed.

Therefore, the reliability of the final product made through the existing two-component liquid silicon mixing equipment is inevitably low, and the resulting quality uniformity is a very serious obstacle to the development of related industries.

Republic of Korea Patent Registration 10-1077881 (2011.11.10 announcement) Republic of Korea Patent No. 10-1422408 (July 22, 2014 announcement) Republic of Korea Patent Publication No. 10-2017-0111058 (Published October 12, 2017) Republic of Korea Patent Publication No. 10-2006-0017842 (2006.02.27 published)

Accordingly, it is a first object of the present invention to provide a two-component liquid silicone manufacturing apparatus capable of organically changing the mixing ratio of the main material and the subsidiary material at the request of the user.

In addition, a second object of the present invention is to provide a method for operating a two-component liquid silicone manufacturing apparatus that can immediately and continuously eliminate the variation in the transfer amount even if a deviation occurs in the transfer amount of the main material and the subsidiary material constituting the two-component liquid silicone. To provide.

In order to achieve the first object of the present invention described above, in one embodiment of the present invention, the main material storage tank in which the main material of the two-component liquid silicone is stored, the material storage tank in which the material of the two-component liquid silicone is stored, and the main material storage tank. A first liquid transfer device for transferring the main material contained in the outside to the outside, a second liquid transfer device for transferring the submaterial contained in the submaterial storage tank to the outside, a main material discharged from the first liquid transfer device and the second transfer device; An apparatus for producing a two-liquid liquid silicone comprising a mixing block for mixing subsidiary materials, comprising: a first digital flow meter for measuring a flow rate of a main material transferred from the first liquid transfer device to a mixing block, and from the second liquid transfer device A second digital flowmeter for measuring the flow rate of the material to be transferred to the mixing block, and the first digital flowmeter and the second digital flowmeter Compared to the flow rate information collected through a predetermined mixing ratio to analyze the deviation and the apparatus for manufacturing two-component liquid silicone comprising a control unit for controlling the operation of the first liquid transfer device and the second liquid transfer device to reduce the deviation To provide.

Further, in order to achieve the second object of the present invention, in one embodiment of the present invention, the first digital flowmeter measures the first flow rate information of the main material transferred from the main material storage tank to the mixing block through the first liquid transfer device. A flow rate information collecting step of measuring, by a second digital flowmeter, second flow rate information of the subsidiary material transferred from the subsidiary material storage tank to the mixing block through a second liquid transfer device; and connected to the first digital flowmeter and the second digital flowmeter. A deviation analysis step of the controller analyzing the first flow rate information and the second flow rate information collected from the first flow rate meter and the second flow rate meter by comparing a predetermined mixing ratio and analyzing the deviation of the flow rate; Compensation step of controlling the operation of the liquid transfer device in which the deviation occurs between the first liquid transfer device and the second liquid transfer device to reduce the deviation Provided is a control method of an apparatus for manufacturing a two-component liquid silicone containing.

According to the present invention, since the mixing ratio of the main material and the subsidiary materials constituting the two-liquid liquid silicone in real time is detected in real time through a flow meter, the desired mixing ratio can be controlled within an error range of ± 0.5%. have.

In addition, the present invention can use a variety of power sources, such as hydraulic pressure pump, pneumatic pressure pump, screw device as a power source for transferring the main material and the material from the main material storage tank and the subsidiary material storage tank to the mixing block, the existing two-component liquid silicone Can be used as is.

In addition, the present invention can correct the deviation of the conveyed flow rate, even if the pressure specified for the main material and the subsidiary material is not mixed at the desired mixing ratio due to variables such as the viscosity difference of each material.

1 is a block diagram for explaining a conventional two-component liquid silicone manufacturing apparatus of the present invention.
Figure 2 is a block diagram for explaining a two-component liquid silicone manufacturing apparatus according to the present invention.
Figure 3 is a block diagram showing the electrical connection of the two-component liquid silicone manufacturing apparatus according to the present invention.
Figure 4 is a flow chart for explaining the control method of the manufacturing apparatus of the two-component liquid silicone according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a control method of the apparatus for producing a two-component liquid silicone according to the preferred embodiments of the present invention.

Figure 2 is a block diagram for explaining a two-component liquid silicone manufacturing apparatus according to the present invention, Figure 3 is a block diagram showing the electrical connection of the apparatus for producing a two-component liquid silicone according to the present invention.

2 and 3, the manufacturing apparatus of the two-component liquid silicone according to the present invention is a main material storage tank 110, the main material of the two-component liquid silicone is stored, and the subsidiary material storage tank 120 is stored the material of the two-component liquid silicone ), A first liquid transfer device 210 for transferring the main material contained in the main material storage tank 110 to the outside, and a second liquid transfer device 220 for transferring the material contained in the submaterial storage tank 120 to the outside. ), A mixing block 400 for mixing main materials and subsidiary materials discharged from the first liquid transfer device 210 and the second transfer device, and transfer from the first liquid transfer device 210 to the mixing block 400. A first digital flow meter 310 for measuring the flow rate of the main material to be used, a second digital flow meter 320 for measuring the flow rate of the material material transferred from the second liquid transfer device 220 to the mixing block 400, and First digital flow meter 310 and second digital It includes a control unit 500 for controlling the operation of the first liquid transfer device 210 and the second liquid transfer device 220 by comparing the flow rate information collected through the meter 320 with a predetermined mixing ratio, optional The apparatus further includes a stirrer 600 for mixing the main material and the subsidiary material combined through the mixing block 400, and an injection apparatus 700 for discharging the two-component liquid silicone passed through the stirrer 600 to a mold for molding. Can be configured.

Here, the main material means a first raw material constituting the two-component liquid silicone, and the subsidiary material means a second raw material constituting the two-component liquid silicone.

Hereinafter, each component will be described in more detail with reference to the accompanying drawings. At this time, the main material storage tank 110, the subsidiary material storage tank 120, the mixing block 400, the stirrer 600, and the injection device 700 is the same configuration as the conventional two-component liquid silicon manufacturing apparatus , More detailed description will be omitted.

Referring to FIG. 2, the apparatus for manufacturing two-component liquid silicone according to the present invention includes a first liquid transfer device 210 and a second liquid transfer device 220.

The first liquid transfer device 210 is installed in the main material storage tank 110 to transfer the main material contained in the main material storage tank 110 to the mixing block 400 under the control of the control unit 500, the hydraulic cylinder or Pneumatic cylinder or servo motor is provided to generate driving force.

The second liquid transfer device 220 is installed in the submaterial storage tank 120 to transfer the submaterial contained in the submaterial storage tank 120 to the mixing block 400 under the control of the controller 500. Pneumatic cylinder or servo motor is provided to generate driving force.

As a first embodiment, the first liquid transfer apparatus 210 and the second liquid transfer apparatus 220 according to the present invention may control the pressure of air applied to the pneumatic cylinder under the control of the pneumatic cylinder and the controller 500. It can be configured to include a pneumatic proportional control valve to adjust.

The pneumatic proportional control valve is excellent in the reliability of the control of the pumping pressure under the pneumatic pumping structure, it is possible to easily control the high speed, high output compared to the electric or hydraulic.

As the pneumatic proportional control valve, it is preferable to use a proportional control valve capable of controlling the output of pneumatic pressure from 0.05 to 9 bar without change according to a voltage change of 0 to 10V.

As a second embodiment, the first liquid transfer device 210 according to the present invention is connected to the main material storage tank 110, the shaft and the liquid silicon introduced from the main material storage tank 110 is rotatably installed therein and the Configured to be discharged by a screw coupled to the shaft. Similarly, the second liquid transfer device 220 is connected to the material storage tank 120, so that the additives introduced from the material storage tank 120 is discharged by a shaft installed to be rotatable therein and a screw coupled to the shaft. It is composed.

The first liquid transfer device 210 and the mixing block 400 may be connected to each other through a first transfer pipe, and the second liquid transfer device 220 and the mixing block 400 may be connected to each other through a second transfer pipe. Can be.

Referring to FIG. 2, the apparatus for manufacturing two-component liquid silicone according to the present invention includes a first digital flowmeter 310 and a second digital flowmeter 320.

The first digital flow meter 310 measures the flow rate of the main material transferred from the first liquid transfer device 210 to the mixing block 400. When the flow rate information of the main material is generated by measuring the flow rate of the main material, the controller controls the flow rate of the main material. Provided at 500.

The first digital flow meter 310 is installed at the outlet of the first liquid feeder 210 through which the main material is discharged, or is installed at the inlet of the mixing block 400 through which the main material is introduced, or the first liquid feeder 210. ) And the first mixing pipe connecting the mixing block 400.

The second digital flow meter 320 measures the flow rate of the main material transferred from the second liquid transfer device 220 to the mixing block 400 by measuring the flow rate of the material. When the flow rate information of the subsidiary material is generated, it is provided to the controller 500.

The second digital flowmeter 320 is installed at the outlet of the second liquid feeder 220 through which the subsidiary material is discharged, or is installed at the inlet of the mixing block 400 through which the subsidiary material is introduced, or the second liquid feeder 220. ) And the second conveying pipe connecting the mixing block 400.

In addition, the following [Equation 1] can be used as the flow rate calculation formula of the digital flowmeter.

If necessary, the first backflow pipe provided between the first transport pipe and the mixing block 400 includes a first backflow to prevent backflow of the liquid silicone supplied from the main material storage tank 110 through the first transport pipe. The prevention valve may be installed, and the second transfer pipe provided between the second transfer pipe and the mixing block 400 may prevent the additional material supplied from the subsidiary material storage tank 120 from flowing backward through the second transfer pipe. A second check valve may be installed.

Referring to FIG. 3, the apparatus for preparing two-component liquid silicone according to the present invention may further include an input unit.

The input unit receives the mixing ratio of the main material and the subsidiary material from the manager and provides the mixing ratio to the controller 500. The input mixing unit adjusts the initial mixing ratio at which the mixing ratio of the main material and the subsidiary material is 1: 1 to a desired ratio.

For example, when the manager inputs a mixing ratio of the main material and the subsidiary material at 60:40 through the input unit, the controller 500 controls the first liquid transfer device so that the flow rate information detected by the first digital flowmeter 310 becomes 60% by weight. The control unit 500 controls the operation of the 210, and the control unit 500 controls the operation of the second liquid transfer device 220 such that the flow rate information detected by the second digital flowmeter 320 becomes 40 wt%, thereby, 100 wt% Based on the base material it can be produced a two-component liquid silicone mixed with 60% by weight and the subsidiary material 40% by weight.

Referring to FIG. 3, the apparatus for manufacturing two-component liquid silicone according to the present invention includes a controller 500.

The control unit 500 corrects the deviation of the transfer flow rate of the raw material, which is frequently changed by the difference in viscosity of the raw material (main material, subsidiary material) or the structural variable of the two-component liquid silicon manufacturing apparatus, and for this purpose, the first digital flowmeter 310 And comparing the flow rate information collected through the second digital flowmeter 320 with a predetermined mixing ratio to analyze the deviation, and the deviation of the first liquid transfer apparatus 210 and the second liquid transfer apparatus 220 to reduce the deviation. Control the operation.

Specifically, the control unit 500 receives the pulse values provided from the first digital flowmeter 310 and the second digital flowmeter 320 to analyze the real-time mixing ratio of the main material and the raw material, the real-time mixing ratio and the predetermined mixing ratio Analyze the deviation of the, by providing an output voltage value that can correct the deviation to the pneumatic proportional control valve to control the pneumatic proportional control valve.

As such, the control unit 500 basically based on the data on the flow rate measured from the first digital flow meter 310 and the second digital flow meter 320 at the time of the previous weighing, the first liquid transfer device 210 at the time of the subsequent metering ) By controlling the output values of the second liquid transfer device 220 and the change in the flow rate of the main material and the subsidiary material by applying a changed value to the pressure values received by the first liquid transfer device 210 and the second liquid transfer device 220. To decrease.

The control unit 500 is connected to the first liquid transfer unit 210 and the second liquid transfer unit 220, the first digital flowmeter 310 and the second digital flowmeter 320, and the input unit, PLC (Programmable Logic) Controller) can be used.

If necessary, the control unit 500 compares and compensates pulse values collected through the first digital flowmeter 310 and the second digital flowmeter 320 to compare and compensate pulse values to control a predetermined mixing ratio. It may further include a comparison calculation compensator.

The comparison operation compensator compares the pulse data obtained through the first digital flowmeter 310 and the second digital flowmeter 320 to control a constant mixing ratio, and uses a open loop controller to adjust a deviation adjustment value of ± 0.5%. By adjusting the voltage value of the first and second liquid transfer device to compensate for the deviation.

Specifically, the silicon injection machine must be weighed before injecting the liquid silicon. This is the same as having to fill the syringe before scavenging the syringe. Therefore, the initial data is the data coming out when weighing for the first injection in the absence of any data.

In this regard, the comparison operation compensator compares the initial data from each flowmeter of A and B to reduce the pressure on the side with a large amount of material or increase the pressure on the side with a small amount of material according to the set parameter to perform the second weighing and injection. do.

Injection is meaningless in the feeding device (dose), and the weighing amount (measurement value of the flowmeter) at the time of weighing is meaningful. In the past, the method of changing the pressure at the next weighing based on the previous weighing amount was used. The comparison operation compensator compares the pulse data obtained through the first digital flowmeter 310 and the second digital flowmeter 320 in real time, and shows the change trend of both weighing data and reduces the deviation by adjusting the pressure in real time. To provide.

To this end, the comparison operation compensator utilizes the open loop technique of the electronic control theory as a method of evaluating the comparison value of the pulse data to reduce the deviation.

Figure 4 is a flow chart for explaining the control method of the manufacturing apparatus of the two-component liquid silicone according to the present invention.

Referring to Figure 4, the control method of the two-component liquid silicone manufacturing apparatus according to the present invention is a flow rate information collection step (S100) for measuring the flow rate information of the material transferred from each storage tank to the mixing block 400, Comparing and analyzing the flow rate information and the predetermined mixing ratio to analyze the deviation by analyzing the deviation (S200), and the compensation step (S300) for controlling the operation of the liquid transfer device to reduce the deviation.

The flow rate information collecting step (S100) is the first digital flow meter 310 measures the first flow rate information of the main material transferred from the main material storage tank 110 to the mixing block 400 through the first liquid transfer device 210 The second digital flow meter 320 measures the second flow rate information of the subsidiary material transferred from the subsidiary material storage tank 120 to the mixing block 400 through the second liquid transfer device 220. In the flow rate information collection step (S100), the flow rate information measured by the first digital flow meter 310 and the second digital flow meter 320 is provided to the controller 500.

Before the flow rate information collecting step S100, a mixing ratio specifying step S50 of specifying a mixing ratio of the main material and the subsidiary material through an input unit connected to the control unit 500 may be further included. In this step (S50), if the input unit provides the newly input mixing ratio to the control unit 500, the control unit 500 replaces the existing mixing ratio with the newly input mixing ratio through the input unit.

For example, when the mixing ratio of the main material and the subsidiary material prespecified in the control unit 500 is stored at 5: 5, and the mixing ratio of the main material and the subsidiary material is input at 6: 4 through the input unit, the control unit 500 controls the Set the mixing ratio to 6: 4.

In the deviation analysis step (S200), the control unit 500 connected to the first digital flowmeter 310 and the second digital flowmeter 320 is collected from the first digital flowmeter 310 and the second digital flowmeter 320. Comparing the first flow rate information and the second flow rate information with a predetermined mixing ratio to analyze the deviation of the transfer flow rate. In the deviation analysis step, the control unit 500 controls the target transfer flow rate and the control unit 500 to analyze the variation of the flow rate of the raw material, which is frequently changed by the viscosity difference of the raw materials (main material, subsidiary materials) or the structural variables of the two-component liquid silicon manufacturing apparatus. The variation of the actual conveying flow rate transferred by the first liquid transfer device 210 and the second liquid transfer device 220 is analyzed by the control.

The compensating step (S300) is a step in which the controller 500 controls the operation of the liquid transfer device in which the deviation occurs between the first liquid transfer device 210 and the second liquid transfer device 220 so as to reduce the deviation. . In this step (S300) to control the operation of the liquid transfer device in which the deviation is generated so that the deviation is reduced. For example, the controller 500 increases the feed amount of the first liquid transfer device 210 to increase the mixing ratio of the main material when the main material is analyzed to be mixed smaller than the predetermined mixing ratio, and the material is less than the predetermined mixing ratio. If it is analyzed that the mixture is small, the amount of conveyance of the second liquid transfer device 220 is increased to increase the mixing ratio of the subsidiary materials.

Specifically, the control unit 500 provides an output voltage value capable of correcting the deviation to the pneumatic proportional control valve of the first liquid transfer device 210 or the second liquid transfer device 220 to transfer the insufficient liquid material. Compensate the amount of feed in the device.

Although the above has been described with reference to the preferred embodiments of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. It will be appreciated.

110: main material storage tank 120: subsidiary material storage tank
210: first liquid transfer apparatus 220: second liquid transfer apparatus
310: first digital flowmeter 320: second digital flowmeter
400: mixing block 500: control unit
600: stirrer 700: injection device

Claims (10)

A main material storage tank in which the main material of the two-component liquid silicon is stored, a submaterial storage tank in which the submaterial of the two-component liquid silicon is stored, a first liquid transfer device for transferring the main material contained in the main material storage tank to the outside, and the submaterial storage tank. A second liquid conveying apparatus for conveying the received submaterials to the outside, a mixing block for mixing the main material and the submaterials discharged from the first liquid conveying apparatus and the second conveying apparatus, and a conveying block from the first liquid conveying apparatus to the mixing block A first digital flowmeter for measuring the flow rate of the main material, a second digital flowmeter for measuring the flow rate of the component material transferred from the second liquid transfer device to the mixing block, and collected through the first digital flowmeter and the second digital flowmeter The first liquid transfer device to analyze the deviation by comparing the flow rate information with a predetermined mixing ratio and to reduce the deviation In the second two-pack manufacturing apparatus of a liquid silicone and a controller for controlling the operation of the liquid transfer device,
It includes an input unit for receiving the mixing ratio of the main material and the subsidiary material from the manager to provide to the controller
The first liquid transfer device and the second liquid transfer device adjust the pressure of air applied to the pneumatic cylinder under the control of the pneumatic cylinder, and the control unit, but pneumatic pressure of 0.05 to 9 bar according to the voltage change of 0 to 10V It comprises a pneumatic proportional control valve formed of a proportional control valve capable of controlling the output without permission,
The control unit includes a comparison operation compensator to compare the pulse data collected by the first digital flowmeter and the second digital flowmeter to compensate for the deviation by comparing the operation of the pulse value to control a predetermined mixing ratio,
The comparison operation compensator controls the constant mixing ratio by immediately eliminating the deviation of the transfer amount even if a deviation occurs in the transfer amount of the main material and the subsidiary material constituting the two-component liquid silicone so that the mixing ratio input through the input unit is kept constant. To compare the pulse data obtained through the first digital flowmeter and the second digital flowmeter in real time, and using the open loop controller, the voltage value of the first liquid feeder and the second liquid feeder with a deviation adjustment value of ± 0.5%. It is configured to compensate for the deviation in real time by providing an output voltage value capable of correcting the deviation to the pneumatic proportional control valve of the first liquid transfer device or the pneumatic proportional control valve of the second liquid transfer device to adjust the deviation. Apparatus for producing liquid liquid silicone. delete delete delete delete delete The method of claim 1,
An agitator for mixing the main material and the subsidiary material combined through the mixing block; And
Apparatus for producing a two-component liquid silicone characterized in that it further comprises an injection device for discharging the two-component liquid silicone passed through the stirrer to the mold for molding. delete delete delete

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