KR20220145035A - Manual agitator for forming polyurethane - Google Patents

Abstract

The present invention is configured so that a remaining amount detection means is installed in an undiluted solution container which supplies an undiluted solution to an agitating container, and when a level of the undiluted solution in the undiluted solution container reaches the lowest level, the undiluted solution is automatically supplemented to an undiluted solution drum. Accordingly, foaming and molding can be intensively carried out, and work efficiency can be thus increased. At this time, when the level of the undiluted solution supplemented from the undiluted solution drum to the undiluted solution container does not reach a predetermined level, and there is a shortage of the undiluted solution, a warning means warns an operator that the undiluted solution drum is empty. Accordingly, the operator can quickly respond to the shortage. In addition, a floating body moving in the direction of gravity according to the level of the undiluted solution touches a sensor mounted at the lowest undiluted solution level so as to enable the identification of the lowest level of the undiluted solution. Therefore, the present invention has a simple structure and can be easily manufactured and used. In addition, the present invention enables an operator to visually check the remaining amount of the undiluted solution in the undiluted solution container.

Description

Manual agitator for polyurethane foam molding {MANUAL AGITATOR FOR FORMING POLYURETHANE}

The present invention relates to a manual stirrer for polyurethane foam molding, and more specifically, a residual amount detecting means is configured so that the remaining amount of the stock solution can be checked in the stock solution that supplies the stock solution to the stirrer according to the mixing ratio of the stock solution supplied from the stock solution drum. By doing so, when the remaining amount of the undiluted solution reaches the lowest level, the undiluted solution drum is automatically refilled with the undiluted solution. At this time, when the undiluted solution is insufficient in the undiluted solution drum, the warning means is activated to promptly replace the undiluted solution drum with a new undiluted solution drum so that continuous operation can be performed.

Polyurethane is a high molecular compound consisting of a urethane bond made by combining an alcohol group and an isocyanate group. As shown in the following (Patent Document 1) to (Patent Document 3), the undiluted solution is mixed and aged for a certain period of time to obtain polyurethane. manufacture

(Patent Document 1) Korean Patent No. 10-2208699

A method of making a foam comprising a polyurethaneurea dispersion is provided. These foams have enhanced flexibility and compression resistance compared to conventional polyurethane foams. Such foams can also be produced by reaction injection molding processes. The method comprises (a) providing a first composition comprising at least one polyol, a chain extender composition and a blowing agent; (b) providing a second composition comprising at least one of a diisocyanate, a capped glycol, and combinations thereof; (c) mixing the first composition and the second composition to form a reaction mixture in a heated mold; (d) preparing a molded polyurethane foam article by allowing the reaction mixture to form a polyurethane foam, wherein the first composition comprises (i) a chain extender composition comprising at least one amine compound; (ii) a foaming agent comprising an aqueous polyurethaneurea dispersion; and (iii) a combination of (i) and (ii).

(Patent Document 2) Korean Patent No. 10-0426329

It relates to an injection device for polyurethane foam, wherein, in a head member having a cylindrical inner space, when an undiluted solution is injected by a first nozzle for spraying isocyanate and a second nozzle for spraying polyol, a screw that is interpolated into the head member and rotates In the polyurethane foam injection device that is mixed by the member and discharged to the outlet of the head member, one or one liquid receiving groove recessed along the longitudinal direction at the upper end of the screw member, which is the liquid discharge position of the first and second injection ports It relates to a polyurethane foam injection device characterized in that the screw member formed above. By this device, the mixture of isocyanate and polyol remaining in the inner space of the head member and the surface of the screw member does not remain, the use of a cleaning agent becomes unnecessary, the working environment is clean, and there is no additional cost for collection, There is an advantage that a polyurethane foam injection device that does not require empty discharge is provided.

(Patent Document 3) Korean Patent No. 10-0855222

In the polyurethane foam molding apparatus for injecting isocyanate and polyol into the mixing chamber through respective injection nozzles, and mixing and discharging the isocyanate and polyol injected through a mixing screw provided at the bottom of the mixing chamber, the color toner is injected into the mixing chamber It relates to a polyurethane foam molding apparatus combined with a toner nozzle, characterized in that the toner nozzle is connected to form the color of the polyurethane foam when the isocyanate and the polyol are mixed. When a desired color is selected through the computer display by this molding device, the output amount of the toner nozzle is controlled through the color database, so that the color expression is automated, so that the color toner is replaced every time according to the color to be produced. There is an advantage in that there is provided a polyurethane foam molding apparatus combined with a toner nozzle, which eliminates the inconvenience of having to do it again and reduces the cost of time and effort by the conventional trial and error method.

On the other hand, unlike the automatic foaming machine that foams and molds polyurethane by automatically mixing and foaming polyol and isocyanate, the manual foaming machine, which is manually foamed, is stirred on the mold (M) as shown in [Fig. 1] and [Fig. 2]. The barrel 10 is installed, and the polyol stock solution barrel 20 and the isocyanate stock solution barrel 30 are provided in the stirring barrel 10 so that the mixing ratio can be adjusted manually. At this time, the polyol stock solution barrel 20 and the isocyanate stock solution barrel 30 are configured to manually replenish the stock solution through the polyol stock solution drum 20 ′ and the isocyanate solution drum 30 ′. Accordingly, the existing manual foaming machine has the following problems.

(1) In order to foam-molding polyurethane, the undiluted solution is supplied to the mold at a predetermined mixing ratio from the polyol undiluted solution container and the isocyanate undiluted solution tank. .

(2) Since it is necessary to replenish the undiluted solution from the undiluted solution drum to the undiluted solution container several times a day, the foaming process does not continue and the efficiency of the foaming operation decreases.

(3) In particular, as the undiluted solution container has a small capacity so that the undiluted solution can be supplied according to the mixing ratio in the stirring barrel, this replenishment operation occurs frequently (40 minutes/day loss because it needs to be replenished 8 times at 5 minutes per day) this occurs).

(4) While replenishing the undiluted solution in this way, the temperature of the undiluted solution in the undiluted container is not kept constant, so even if the undiluted solution is replenished, the foaming operation cannot be performed immediately. In this way, if the temperature is not kept constant and foamed, it may lead to poor foam molding.

(5) On the other hand, it is unknown how much remaining amount is left in the undiluted drum that supplies the undiluted solution to the undiluted solution container, so a situation arises that the undiluted solution drum needs to be replaced during polyurethane foam molding. If you cannot predict when to replace the stock drum, it is difficult to work safely because you don’t know when to replace the stock drum, and it can lead to poor molding because you can’t match the mixing ratio.

Korean Patent No. 10-2208699 (Registration Date: 2021.01.22) Korean Patent Registration No. 10-0426329 (Registration Date: March 26, 2004) Korean Patent Registration No. 10-0855222 (Registration Date: 2008.08.25)

The present invention is made in consideration of this point, and a residual amount detection means is installed in the undiluted solution container that supplies the undiluted solution to the stirring barrel, and when the undiluted solution level in the undiluted solution reaches the lowest level, the replenishment of the undiluted solution is made automatically in the undiluted drum. An object of the present invention is to provide a manual stirrer for polyurethane foam molding that can focus only on foam molding, thereby increasing work efficiency.

At this time, the present invention warns the operator through a warning means to know that the undiluted solution drum is empty when the level of the undiluted solution replenished in the undiluted solution drum does not reach the predetermined level and a shortage of the undiluted solution occurs. Another object of the present invention is to provide a manual stirrer for polyurethane foam molding that enables rapid response.

In addition, the present invention is configured so that a floating body moving in the direction of gravity according to the level of the stock solution can identify the lowest level of the stock solution by contacting the sensor mounted at the lowest level of the stock solution, so that the structure is simple and easy to manufacture and use, as well as the operator Another object of the present invention is to provide a manual stirrer for polyurethane foam molding that enables visual confirmation of the remaining amount of the undiluted solution in the undiluted solution container.

A manual stirrer for polyurethane foam molding according to the present invention for achieving this object, the injection line 110 is connected to the lower portion of the stirrer 100 for supplying the stirring liquid to the mold (M); a first stock solution container 200 that receives polyol from the polyol dream 200 ′ and is connected to the stirring barrel 100 through a first supply line 210 to supply polyol in a predetermined amount according to the mixing ratio; a second stock solution container 300 that receives isocyanate from the isocyanate dream 300 ′, and is connected to the stirring barrel 100 through a second supply line 310 to supply isocyanate in a certain amount according to the mixing ratio; Residual amount detection means (220, 320) installed in each of the first undiluted solution container 200 and the second undiluted solution container 300 to detect the lowest level of the residual stock solution; controller; and warning means (230, 330) operating under the control of the controller; When there is a detection signal from the remaining amount detecting means 220, 320, the controller causes the stock solution to be supplied to the stock solution container from the corresponding stock solution drum and fills it to a certain level, and if it is not filled to a certain level, the warning means 230, 330 It is characterized in that it is configured so that it can be confirmed that the undiluted solution is insufficient in the drum by making this operation.

In particular, the residual amount detecting means (220, 320), each made of a transparent material, one side is connected to the lower part of the undiluted solution to allow the undiluted solution to flow, and the other side is a water level pipe (221) installed in parallel with the undiluted solution bottle up and down. ; a floating body 222 installed in the water level pipe 221 and moving up and down according to the level of the stock solution; and a sensor 223 installed under the water level pipe 221 and outputting a detection signal to the controller while the floating body 222 comes into contact as the water level of the undiluted solution is lowered to a predetermined height. .

In addition, the warning means (230, 330) is characterized in that it is composed of a warning light and a horn so as to give a warning through the operator's visual and auditory sense, respectively.

The manual stirrer for polyurethane foam molding according to the present invention has the following effects.

(1) A residual amount detection means is configured so that the lowest level of the original solution can be known in the undiluted container that receives the undiluted solution from the undiluted drum containing polyol and isocyanate, and when the lowest undiluted solution level is reached, the undiluted solution is automatically replenished in the undiluted drum By doing so, it is possible to omit the process of directly replenishing the undiluted solution from the undiluted drum to the undiluted solution container, thereby increasing work efficiency.

(2) In addition, the residual amount detection means judges that the undiluted solution drum is insufficient if the undiluted solution level is not refilled when replenishing the undiluted solution, and warns that the time has come to replace the undiluted solution drum through the warning means so that the operator can respond quickly and safely. can

(3) At this time, the warning means is configured to notify through a warning light and a horn, so that the operator can accurately recognize the replacement time of the undiluted drum through sight and sound and respond quickly.

(4) Meanwhile, in the water level pipe installed in the gravity direction so that the residual amount detection means for detecting the stock solution level can check the stock solution level, the floating body moves according to the stock solution level and makes contact with the sensor at the lowest water level to inform the replacement of the original solution container. By composing it, the structure is simple, but it can be easily manufactured and used conveniently.

[Figure 1] is a perspective view showing the configuration of a conventional manual foaming machine.
[Figure 2] is a cross-sectional view showing a state in which polyurethane is foamed with a conventional manual foaming machine.
[Figure 3] is a schematic diagram showing a manual stirrer for polyurethane foam molding according to the present invention.
[Figure 4] is a schematic diagram showing a state in which the water level of the stock solution supplied to the manual stirrer for polyurethane foam molding according to the present invention has reached the lowest level.
[Fig. 5] is a schematic diagram showing a state in which the undiluted solution is automatically replenished from the undiluted drum to the undiluted solution container where the level of the undiluted solution has reached the lowest level according to the present invention.
[Fig. 6] is a schematic diagram showing a state in which the undiluted solution is insufficient in the undiluted solution drum while replenishing the undiluted solution from the undiluted solution drum to the undiluted solution container according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to their ordinary or dictionary meanings, and the inventor may properly define the concept of the term in order to best describe his invention. It should be interpreted as meaning and concept consistent with the technical idea of the present invention in accordance with the principle that it is possible.

Accordingly, the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiment of the present invention and do not represent all the technical spirit of the present invention, so various equivalents that can be substituted for them at the time of the present application It should be understood that there may be variations and examples.

[Configuration of Manual Agitator]

In the manual stirrer for polyurethane foam molding according to the present invention, as shown in [Fig. 3] to [Fig. 6], polyol and isocyanate are supplied from the stirring barrel 100, the polyol drum 200' and the isocyanate drum 300' The first undiluted solution container 200 and the second undiluted solution container 300 for separately supplying polyol and isocyanate at a predetermined mixing ratio to the stirring tank 100, residual amount detection means 220 and 320 for detecting the residual stock solution, a controller, and warning means 230 and 330 .

In particular, the residual amount detecting means 220, 320 is configured to detect the amount of the undiluted solution remaining in the first undiluted solution container 200 and the second undiluted solution container 300, and output a detection signal to the controller when the undiluted solution remaining amount is less than or equal to the minimum remaining amount Thus, the undiluted solution is replenished to the first undiluted solution container 200 and the second undiluted solution container 300 from the undiluted solution drum under the control of the controller, so that the operation can be continued.

In addition, during the replenishment of the undiluted solution as described above, if the replenishment of the undiluted solution is not made to the predetermined water level in the first undiluted solution container 200 and the second undiluted solution container 300, the controller determines that the undiluted solution drum is empty and the warning means 230 , 330) is operated so that the undiluted drum can be replaced quickly.

And the residual amount detecting means 220, 320 installs the floating body 222 that moves according to the change in the water level of the stock solution in the water level pipe 221 that can check the level of the stock solution, and as the level of the stock solution decreases, the floating body ( 222) is configured to detect a signal by touching the sensor 223 installed under the water pipe 221, so that the structure is simple and easy to use.

Hereinafter, such a configuration will be described in more detail with reference to the accompanying drawings.

go. stirrer

The stirring cylinder 100 is a cylinder that allows the polyurethane to be foam-molded by mixing and mixing polyol and isocyanate at a certain ratio, as shown in FIGS. 3 to 6 , and injecting it into the mold M.

Accordingly, the stirring barrel 100 is manufactured in a size that can sufficiently supply a mixture of polyol and isocyanate to the mold (M), and a spray line 110 is formed at the bottom to supply the mixture to the mold (M). let there be At this time, the injection line 110 allows the formulation to be dropped directly into the mold M by gravity from the stirring barrel 100 in a manual manner.

me. first undiluted container and second undiluted container

As shown in [Fig. 3] to [Fig. 6], the first undiluted solution container 200 supplies polyol to the stirring barrel 100 through the first supply line 210, and the second undiluted solution container 300 supplies the second It is a barrel for supplying the isocyanate to the stirring barrel 100 through the supply line (310). At this time, the polyol drum 200' is connected to the first undiluted solution container 200 and configured to forcibly supply polyol through a pump, etc., and the isocyanate drum for storing isocyanate in the second undiluted solution container 300 ( 300') and is configured to be supplied with isocyanate forcibly through a pump or the like.

On the other hand, in the first undiluted solution container 200 and the second undiluted solution container 300, respectively, as shown in FIG. 3 , a residual amount detecting means 220 to detect a certain level, preferably the lowest level, of the remaining stock solution , 320) and warning means 230 and 330 are configured. At this time, since these residual amount detecting means 220 and 320 have the same configuration, only the residual amount detecting means 220 installed in the first undiluted solution container 200 will be described, and the remaining amount detecting means installed in the second undiluted solution container 300 ( 320) differs only in the type of the undiluted solution, but the composition is the same, so a detailed description thereof will be omitted.

1. Residual amount detection means

The residual amount detecting means 220 includes a water pipe 221 , a floating body 222 , and a sensor 223 as shown in FIGS. 3 to 5 .

(One) water pipe

The water level pipe 221, as shown in [Fig. 3], is mounted to the first undiluted solution bottle 200 so as to be perpendicular to the change in the water level of the undiluted solution exiting from the first undiluted solution bottle 200. At this time, the water level pipe 221 is connected in communication with the first undiluted solution bottle 200 at a position lower than a sensor 223 to be described later used when one side detects the lowest undiluted solution level in the first undiluted solution bottle 200, The polyol (undiluted solution) filled in the first undiluted solution container 200 is configured such that the water level can be displayed through the water level pipe 221 . At this time, it is preferable that the water level pipe 221 is made of a transparent material so that the operator can check the remaining amount of the stock solution while directly looking at the water level pipe 221 .

(2) floating body

The floating body 222 is installed in the water pipe 221 and made of a material that floats on the surface of the stock solution, as shown in FIG. 3 . When the floating body 222 touches a sensor 223 to be described later on the bottom surface, it sends a signal to a controller to be described later so that the controller can control the warning means 230 and 330 . That is, the floating body 222 moves up and down according to the level of the stock solution in the water level tube 221 to show the level of the stock solution, and when it goes down below the lowest water level, it touches the sensor 223 to be described later and the sensor 223 moves up and down. Let the signal be output to the controller.

(3) sensor

The sensor 223 is a sensor for detecting when to replenish polyol from the polyol drum 200 ′ to the first undiluted solution container 200 , as shown in FIG. 3 , mounted on the lower part of the water pipe 221 . . At this time, the sensor 223 causes the floating body 222 to move up and down along the water pipe 221, and as the polyol stock solution decreases, when the floating body 222 comes into contact with the sensor 223, the polyol is released. A signal is sent to the controller to let it know that the replenishment level has been reached.

On the other hand, in a preferred embodiment of the present invention, the residual amount detecting means 220 is manufactured in the form of a single sensor, so even if the residual amount cannot be checked from the outside of the polyol stock solution container 200 Any sensor that can detect that the water level has been reached can be used.

me. controller

Although not shown in the drawing, the controller operates by receiving the detection signal detected by the remaining amount detecting means 220 and 320 as shown in FIGS. 4 and 5 . At this time, the controller receives the signal from the residual amount detection means 220 and 320 when the polyol or isocyanate reaches the lowest undiluted solution level in the first undiluted solution container 200 or the second undiluted solution container 300, and the polyol drum 200' It controls an actuator such as a pump that supplies the stock solution from the isocyanate drum 300 ′ to the stock solution container to be replenished. At this time, since the controller knows the capacities of the first undiluted solution container 200 and the second undiluted solution container 300, the actuator controls the actuator to supply the stock solution to the extent that it does not overflow in consideration of the capacity of the undiluted solution container.

On the other hand, the controller, as exemplified in [Fig. 6], when replenishing the stock solution from the isocyanate drum 300' to the second stock solution container 300, the stock solution determined by the shortage of the stock solution in the isocyanate drum 300' If the second undiluted solution container 300 is not replenished up to the water level, the warning means 230 and 330 to be described later operate to guide replacement of the isocyanate drum 300 ′ with insufficient undiluted solution.

All. warning means

The warning means 230 and 330 are installed in the first and second undiluted solutions 200 and 300, as shown in FIGS. 3 to 5 . At this time, the warning means 230 and 330 operate by receiving the signal from the above-described controller. As described above, the controller controls the warning means 230 and 330 of the undiluted drum to be replaced when there is no undiluted solution to be replenished in the undiluted drum when replenishing the undiluted solution as described above. Here, since the warning means 230 and 330 have the same configuration, there is only a difference depending on whether the stock solution is insufficient in polyol or insufficient in isocyanate, so the explanation with one warning means 330 is as follows. When the controller replenishes the undiluted solution from the isocyanate drum 300 ′ to the second undiluted solution container 300 with the undiluted solution replenishment signal, the controller The warning means 330 is controlled to operate.

Here, to detect that the stock solution is not replenished, a separate sensor is mounted on the upper part of the water pipe as described above at the maximum stock solution level, and the floating body moving in the water pipe contacts the separate sensor, indicating that the stock solution has been replenished. It is preferable to configure it so that it is known. In addition to this, it is possible to check whether the replenishment has been completed in various ways, such as configuring a sensor separately in the second undiluted solution container 300 or detecting the rotational force of an actuator such as a pump.

In a preferred embodiment of the present invention, the warning means (230, 330) is composed of a warning light and a horn and mounted on each undiluted solution container, so that when it is time to replace the undiluted solution drum under the control of the controller, the warning light and beep are generated so that the operator can see It is desirable to configure it so that it can be easily identified and dealt with when it is time to replace the undiluted solution drum through oversight.

As described above, the present invention installs a residual amount detection means in the undiluted solution container containing each polyol and isocyanate to automatically replenish the undiluted solution in the undiluted solution drum, and a warning means when the undiluted solution drum is empty because the undiluted solution is not refilled in the undiluted solution drum By configuring it to warn through the undiluted solution, it is not necessary to frequently replenish the undiluted solution, so that continuous foaming can be performed, and the replacement time of the undiluted drum can be easily recognized and dealt with quickly.

100: stirrer
110: injection line
200, 300: 1st, 2nd undiluted container
210, 310: first and second supply lines
220, 320: residual amount detection means
221: janitor
222: floating body
223: sensor
230, 330: warning means

Claims (3)

A stirring vessel 100 for supplying a stirring liquid to the mold (M) is connected to the injection line 110 at the bottom; a first stock solution container 200 that receives polyol from the polyol dream 200 ′ and is connected to the stirring barrel 100 through a first supply line 210 to supply polyol in a predetermined amount according to the mixing ratio; a second stock solution container 300 that receives isocyanate from the isocyanate dream 300 ′, and is connected to the stirring barrel 100 through a second supply line 310 to supply isocyanate in a certain amount according to the mixing ratio; Residual amount detection means (220, 320) installed in each of the first undiluted solution container 200 and the second undiluted solution container 300 to detect the lowest level of the residual stock solution; controller; and warning means (230, 330) operating under the control of the controller;
When there is a detection signal from the remaining amount detecting means 220, 320, the controller causes the stock solution to be supplied to the stock solution container from the corresponding stock solution drum and fills it to a certain level, and if it is not filled to a certain level, the warning means 230, 330 A manual stirrer for polyurethane foam molding, characterized in that it is configured so that it can be confirmed that the drum is in a state of insufficient stock by making this operation.
In claim 1,
The remaining amount detection means 220, 320, respectively,
A water level pipe 221 made of a transparent material, one side of which is connected to the lower part of the undiluted solution so that the undiluted solution can flow, and the other side is installed in parallel with the undiluted solution up and down;
a floating body 222 installed in the water level pipe 221 and moving up and down according to the level of the stock solution; and
A sensor 223 installed under the water level pipe 221 and outputting a detection signal to the controller while the floating body 222 comes into contact as the water level of the stock solution is lowered to a predetermined height; Poly comprising a; Manual stirrer for urethane foam molding.
In claim 1 or 2,
The warning means (230, 330), respectively,
A manual stirrer for polyurethane foam molding, characterized in that it consists of a warning light and a horn to warn the operator through the eyes and ears.

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