KR102263229B1 - Spray apparatus for automatic foaming - Google Patents

Abstract

A spray device for automated foam molding is provided. In one embodiment, a raw material supply unit to which a plurality of raw materials are supplied; a discharge unit connected to the raw material supply unit so that the plurality of raw materials are introduced and the mixed raw material is discharged through the discharge nozzle; a washing unit for removing foreign substances from the discharge nozzle; and a control unit for controlling the operation of the washing unit, wherein, when the mixed raw material is not discharged from the discharge unit, the control unit may control the washing unit to remove foreign substances from the discharge nozzle.

Description

Spraying device for automated foam molding {SPRAY APPARATUS FOR AUTOMATIC FOAMING}

The present invention relates to a spray device for automated foam molding.

Effervescent resins, such as polyurethanes, are produced by reaction with isocyanates and polyols. A method of forming a polyurethane layer by spraying a polyurethane reaction mixture with a nozzle is described in Korean Patent Application Laid-Open No. 2006-0084359.

In a spray device for foam molding to form a molded article by mixing these foaming raw materials, the mixed raw material is sprayed to form a spray-type polyurethane, but due to the rapid reaction characteristics of the spray, the spray foam is not sprayed while being cured at the nozzle of the spray device There was a problem of clogging and leaving foreign substances. Due to this phenomenon, it is known that the mixed raw material is solidified, which inhibits uniform spraying of the mixed raw material and inhibits the physical properties of the foamed polyurethane foam.

Conventionally, a separate manpower had to be input to remove these foreign substances, or the operation of the foam molding apparatus had to be stopped to remove them. In addition, a method of injecting a washing solution into a spray device and discharging it together with a mixed raw material has been proposed to remove these foreign substances, but the problem that the quality of polyurethane foam is impaired still remained.

The problem to be solved by the present invention is to provide a spray device for automated foam molding that can implement an automated foam molding system while preventing the quality of polyurethane foam from being impaired by a cleaning solution in a spray device for automated foam molding. .

In order to solve the above problems, the present invention provides a spray apparatus for automated foam molding, comprising: a raw material supply unit to which a plurality of raw materials are supplied; a discharge unit connected to the raw material supply unit so that the plurality of raw materials are introduced and the mixed raw material is discharged through the discharge nozzle; a washing unit for removing foreign substances from the discharge nozzle; and a control unit for controlling the operation of the washing unit, wherein the control unit controls the washing unit to remove foreign substances from the discharge nozzle when the mixed raw material is not discharged from the discharge unit. provides

According to an embodiment of the present invention, without stopping or interfering with the operation of the foam molding apparatus, it is possible to implement an automated foam molding system by efficiently removing foreign substances formed inside the discharge nozzle, thereby producing high-quality polyurethane foam. can be formed quickly.

1 and 2 are schematic views of a spray apparatus for automated foam molding according to an embodiment of the present invention.
3 to 7 show an automated foam molding spray apparatus according to each embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only this embodiment allows the disclosure of the present invention to be complete and provides those of ordinary skill in the art the content of the present invention. It is provided for more complete information.

When an element is referred to as being positioned 'above' or 'below' another element in this specification, it means that the element is positioned directly 'above' or 'below' another element, or an additional element is placed between those elements. It includes all meanings that can be interposed. In this specification, the term 'upper' or 'lower' is a relative concept set from the viewpoint of the observer. may mean

The same reference numerals in the plurality of drawings refer to elements that are substantially the same as each other. In addition, terms such as 'comprise' or 'have' are intended to designate that the described feature, number, step, operation, component, part, or combination thereof exists, and includes one or more other features, number, or step. , it should be understood that it does not preclude the possibility of the existence or addition of , operation, components, parts, or combinations thereof.

An embodiment of the present invention, in the spray apparatus for automatic foam molding, a raw material supply unit to which a plurality of raw materials are supplied; a discharge unit connected to the raw material supply unit so that the plurality of raw materials are introduced and the mixed raw material is discharged through the discharge nozzle; a washing unit for removing foreign substances from the discharge nozzle; and a control unit for controlling the operation of the washing unit, wherein the control unit controls the washing unit to remove foreign substances from the discharge nozzle when the mixed raw material is not discharged from the discharge unit. provides

For example, the method may further include a sensor unit configured to detect a foreign material inside the discharge nozzle, and when the foreign material is detected inside the discharge nozzle, the controller may control the washing unit to remove the foreign material from the discharge nozzle.

Meanwhile, the washing unit may spray the washing liquid in the direction of the discharge nozzle.

In this case, the discharge unit may further include a pneumatic unit for spraying air in the direction of the discharge nozzle, wherein the pneumatic unit may spray air when the cleaning liquid is sprayed from the washing unit in the direction of the discharge nozzle.

In this case, the washing unit includes a cleaning liquid nozzle connected to the discharge unit, and the pneumatic unit includes a pneumatic nozzle connected to the discharge unit, wherein the pneumatic nozzle is spaced apart from the cleaning liquid nozzle from the end of the discharge nozzle. can be installed.

In addition, the cleaning unit may include a brush for brushing the discharge nozzle.

In this case, at least a part of the brush may be inserted into the discharge nozzle to brush the inside of the discharge nozzle.

At this time, the discharge unit further comprises a pneumatic unit for spraying air in the direction of the discharge nozzle, wherein the control unit, after brushing the inside of the discharge nozzle, the brush comes out from the inside of the discharge nozzle, the air is injected from the pneumatic unit can be controlled to do so.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

1 and 2 are schematic views of a spray apparatus for automated foam molding according to an embodiment of the present invention.

Referring to FIG. 1 , the spray apparatus for automated foam molding includes a raw material supply unit 10 , a discharge unit 20 , a control unit 40 , and a washing unit 30 .

The raw material supply unit 10 supplies a plurality of raw materials to the discharge unit 20 , and a foaming raw material for forming a polyurethane foam product such as polyol and isocyanate is supplied. Although not shown in the drawings, a pump may be installed to supply a plurality of raw materials at an appropriate pressure.

The discharge unit 20 receives a plurality of raw materials from the raw material supply unit 10 and injects them to the outside through a discharge nozzle to be described later. After the plurality of raw materials are independently introduced from the raw material supply unit 10 to the discharge unit 20 , the plurality of raw materials introduced in the discharge unit 20 may be mixed. For example, the discharge unit 20 includes a mixing chamber (not shown in the drawing) in which the independently introduced raw materials are first mixed, an impeller (not shown in the drawing), and a piston (not shown in the drawing) in which the first mixed raw materials are first mixed. Secondary mixing may be carried out by a known method, such as. That is, the discharge unit 20 can uniformly mix a plurality of raw materials supplied from the raw material supply unit 10 and then spray them to exhibit a certain quality of foaming performance. On the other hand, a pump (not shown in the drawing) may be installed so that a plurality of raw materials are mixed at an appropriate pressure and then sprayed to the outside.

The washing unit 30 removes foreign substances from the discharge nozzle. Foreign substances are a plurality of solidified or hardened raw materials, and when these foreign substances remain inside the discharge nozzle and are discharged from the foam molding process, the quality of the polyurethane foam is rapidly deteriorated. The cleaning unit 30 may use, for example, a cleaning solution capable of dissolving and removing foreign substances, or a brush for physically removing the foreign substances, which will be described later with reference to FIGS. 3 to 7 .

The control unit 40 controls the operation of supplying a plurality of raw materials from the raw material supply unit 10 to the discharge unit 20 , the operation of spraying the foaming material from the discharge unit 20 to the outside, and the operation of the washing unit 30 . do. For example, when the mixed raw material is not discharged from the discharge unit 20 to the outside, the control unit 40 may control the washing unit 30 to remove foreign substances from the discharge nozzle. A specific embodiment will be described later with reference to FIGS. 3 to 7 .

Referring to FIG. 2 , the spray device for automated foam molding further includes a sensor unit 50 in the spray device for automated foam molding described above with reference to FIG. 1 .

The sensor unit 50 detects whether foreign matter is formed inside the discharge nozzle. When the sensor unit 50 detects that there is a foreign material inside the discharge nozzle, the control unit 40 may control the cleaning unit 30 to remove the foreign material from the discharge nozzle. The sensor unit 50 may include a known sensor, for example, a magnetic field sensor, an ultrasonic sensor, an optical sensor, and a magnetic field sensor for detecting a change in amplitude of an induction signal induced to a plurality of detection coils in which an induction signal by a magnetic field is detected; A pressure sensor or the like may be applied.

Meanwhile, when it is detected by the sensor unit 50 that a foreign material is formed inside the discharge nozzle, the control unit 40 may control the cleaning unit 30 to remove the foreign material from the discharge nozzle. That is, by controlling the washing unit 30 only when foreign substances are formed inside the discharge nozzle, the control unit 40 can save a washing solution, prevent abrasion of the brush, or prevent a problem of wasted power.

Also, the control unit 40 may control the washing unit 30 only when the amount of foreign substances formed inside the discharge nozzle is detected to be greater than or equal to a preset range. That is, the spray device for automated foam molding controls the operation of the washing unit 30 within a range capable of maintaining the foaming performance, thereby saving washing liquid, preventing abrasion of the brush, or wasting power. .

3 to 7 show an automated foam molding spray apparatus according to each embodiment of the present invention.

Referring to FIG. 3, the spray device for automated foam molding, in the spray device for automated foam molding described above with reference to FIGS. 1 to 2, further includes a pneumatic unit 500, and the washing unit 300 can spray the cleaning solution. have.

The pneumatic unit 500 may be installed in the discharge unit 200 to inject air in the direction of the discharge nozzle 210 . At this time, the pneumatic unit 500 may inject air when the washing liquid is injected from the washing unit 300 toward the discharge nozzle 210 .

At this time, the pneumatic unit 500 is connected to the discharge unit 200 and includes a pneumatic nozzle 510 for spraying air into the discharge unit 200 , and the cleaning unit 300 is connected to the discharge unit 200 , It may include a cleaning liquid nozzle 310 for spraying the cleaning liquid into the discharge unit 200 .

For example, the pneumatic nozzle 510 may be provided at a position spaced apart from the end 220 of the discharge nozzle than the cleaning liquid nozzle 310 . Therefore, when the cleaning liquid is sprayed from the cleaning liquid nozzle 310 in the direction of the discharge nozzle 210 , the pneumatic nozzle 510 injects air at a high pressure in the direction of the discharge nozzle 210 , and foreign substances formed inside the discharge nozzle 210 . (1) can be effectively dissolved.

For example, the pneumatic nozzle 510 and the discharge nozzle 210 may be provided at opposing positions. Therefore, when the cleaning liquid is sprayed from the cleaning liquid nozzle 310, air is sprayed from the pneumatic nozzle 510 in the direction opposite to the direction in which the cleaning liquid is sprayed and moved in the direction of the discharge nozzle 210, so that the cleaning liquid is discharged from the discharge nozzle 210. By spraying over a large area of , it is possible to effectively dissolve the foreign material 1 formed inside the discharge nozzle 210 .

That is, the spray device for automated foam molding is manufactured by spraying air from the pneumatic unit 500 so that the washing liquid is sprayed on a large area of the discharge nozzle 210, and at the same time effectively discharging foreign substances to the outside of the discharge nozzle 210 It can improve the quality of polyurethane foam.

Referring to FIG. 4 , the spray apparatus for automatic foam molding may include a plurality of pneumatic units 500 and a plurality of cleaning units 300 in the spray apparatus for automatic foam molding described above with reference to FIG. 3 .

That is, when using a foaming raw material in which a lot of foreign substances 1 are formed, the foreign substances 1 can be effectively removed by using the plurality of pneumatic units 500 and the washing unit 300 as described above.

Meanwhile, as described above with reference to FIGS. 1 and 2 , the operation of the washing unit 300 may be controlled by the control unit. That is, the control unit, when the mixed raw material is not discharged from the discharge unit 200, the washing liquid is sprayed from the washing unit 300 and selectively air is sprayed, so that the user does not separately spray and wash the foaming material. Automated foam molding that does not need to be made can be made possible.

Referring to FIG. 5 , in the spray apparatus for automated foam molding, in the spray apparatus for automatic foam molding described above with reference to FIGS. 1 to 2 , the cleaning unit 400 may include a brush 410 .

The cleaning unit 400 may include a brush 410 , a brush body 420 , a plurality of rods 441 and 442 , and a plurality of pins 431 , 432 , and 433 .

The brush 410 may be at least partially inserted into the discharge nozzle 210 from the outside of the discharge unit 200 to brush the inside of the discharge nozzle 210 . For example, the brush 410 may include a material such as cotton yarn, rubber, or flexible plastic. For example, the brush 410 may have a substantially circular shape, and the diameter of the brush 410 may be larger than the diameter of the end of the discharge nozzle 210 . That is, as the brush 410 is inserted into or inserted into the discharge nozzle 210 and rotates, the foreign substances 1 formed inside the discharge nozzle 210 may be removed.

The brush body 420 may have a built-in motor that connects the brush 410 with the moving means and enables rotation of the brush 410 .

The brush body 420 may be connected from the discharge unit 200 via a moving means.

The moving means may include a plurality of pins (431, 432, 433) and a plurality of rods (441, 442). Here, the pin performs a function such as a joint to enable rotational movement of the rod. For example, referring to FIG. 5 , the washing unit 400 includes a first pin 431 connected to the discharge unit 200 , a first rod 441 connected to the first pin 431 and capable of rotating operation, A second pin 432 connected to the end of the first rod 441 to enable the second rod 442 to rotate separately from the first rod 441 , and connected to the end of the second rod 442 . The brush body 420 may include a third pin 433 that enables the rotation operation separately from the second rod 442 . That is, the washing unit 400 is applied with a plurality of rods 441, 442 and a plurality of pins 431, 432, and 433 that enable the rotational movement of the rods, so that the brush 410 efficiently operates the discharge nozzle ( 210) can be made to allow access to the interior.

Meanwhile, as described above with reference to FIGS. 1 and 2 , the operation of the washing unit 400 may be controlled by the control unit. That is, the control unit is spaced apart from the discharge nozzle 210 as shown in FIG. 5 (a) when the mixed raw material is discharged from the discharge unit 200 so as not to block the spraying of the foaming material, and from the discharge unit 200 When the mixed raw material is not discharged, the brush 410 is inserted into the discharge nozzle 210 as shown in FIG. 5(b) to remove the foreign material 1 formed inside the discharge nozzle 210, so that the user can separate the foaming material. Automated foam molding that does not require spraying and washing can be made possible.

Referring to FIG. 6 , the spray apparatus for automated foam molding may further include a pneumatic unit 500 in the spray apparatus for automatic foam molding described above with reference to FIG. 5 .

The pneumatic unit 500 functions to spray air in the direction of the discharge nozzle 210 to efficiently discharge the foreign substances 1 removed by the washing unit 400 to the outside of the discharge nozzle 210, and the installation location and number are shown in Fig. 3 to 4 may be applied to the above.

Meanwhile, as described above with reference to FIGS. 1 and 2 , the operation of the washing unit 400 may be controlled by the control unit. The control unit, after brushing the inside of the discharge nozzle 210 by the washing unit 400, the brush 410 comes out from the inside of the discharge nozzle 210, the pneumatic unit 500 can control to spray air have.

That is, when the mixed raw material is discharged from the discharge unit 200, the control unit is spaced apart from the discharge nozzle 210 as described above with reference to FIG. 5(a) so as not to block the spraying of the foaming material, and the discharge unit When the mixed raw material is not discharged from the 200, the brush 410 is inserted into the discharge nozzle 210 as described above with reference to FIG. 5(b) to remove the foreign material 1 formed inside the discharge nozzle 210 After the brush 410 exits from the inside of the discharge nozzle 210 and before the mixed raw material is discharged again, the pneumatic unit 500 sprays air to reliably eject the foreign material 1 to the outside of the discharge nozzle 210 . It is possible to improve the quality of the polyurethane foam by removing the solidified foreign material (1) while enabling automated foaming that does not require the user to separately spray and wash the foaming material by discharging it.

Referring to FIG. 7 , the spray device for automatic foam molding further includes a cleaning unit 300 for spraying a cleaning solution in addition to the cleaning unit 400 including the cleaning unit 400 including a brush in the spray apparatus for automatic foam molding described above with reference to FIG. 6 . can do.

The washing unit 300 may apply the above-described ones with reference to FIGS. 3 to 4 .

Meanwhile, as described above with reference to FIGS. 1 and 2 , the washing units 300 and 400 may be operated by the control unit.

That is, the control unit, when the mixed raw material is not discharged from the discharge unit 200 , the washing liquid is sprayed from the washing unit 300 , and the brush 410 is inserted into the discharge nozzle 210 to remove the foreign material 1 . After the brush 410 comes out of the discharge nozzle 210 and before the mixed raw material is discharged again, the pneumatic unit 500 sprays air to reliably discharge the foreign material 1 to the outside of the discharge nozzle 210 . By doing so, it is possible to enable automated foam molding that does not require the user to separately spray and wash the foaming material, and at the same time, it is possible to improve the quality of the polyurethane foam by reliably removing the solidified foreign material (1). In this case, the injection of the cleaning solution and the insertion of the brush 410 into the discharge nozzle 210 may be simultaneously performed, or the front and rear may be modified.

In addition, another aspect of the present invention provides an automated foam molding system using the spray apparatus for automated foam molding described above.

As described above, the detailed description of the present invention has been made by the embodiments with reference to the accompanying drawings, but since the above-described embodiments have only been described with preferred examples of the present invention, the present invention is limited only to the above embodiments. It should not be understood, and the scope of the present invention should be understood as the following claims and their equivalents.

For example, the drawings are schematically shown with each component as a main body to help understanding, and the thickness, length, number, etc. of each illustrated component may differ from the actual one in the course of drawing creation. In addition, the material, shape, dimension, etc. of each component shown in the above-mentioned embodiment are only one example, and are not specifically limited, Various changes are possible in the range which does not deviate substantially from the effect of this invention.

10: raw material supply unit
20: discharge part
30: washing unit
40: control unit
50: sensor unit
1: Foreign matter
100: raw material supply unit
200: discharge unit
210: discharge nozzle
220: end of the discharge nozzle
300, 400: washing unit
310: cleaning liquid nozzle
410: brush
420: brush body
431: first pin
432: second pin
433: 3rd pin
441: first rod
442: second rod
500: pneumatic unit
510: pneumatic nozzle

Claims (8)

a raw material supply unit to which a plurality of raw materials are supplied;
a discharging unit connected to the raw material supply unit so that the plurality of raw materials are introduced and the mixed raw material is discharged through the discharging nozzle;
a cleaning unit for removing foreign substances from the discharge nozzle;
a control unit configured to control the washing unit to remove foreign substances from the discharge nozzle when the mixed raw material is not discharged from the discharge unit; and
The discharge unit includes a pneumatic unit for spraying air in the direction of the discharge nozzle when the cleaning liquid is sprayed from the washing unit,
The washing unit includes a washing liquid nozzle connected to the discharge unit,
The pneumatic unit includes a pneumatic nozzle connected to the discharge unit,
From the end of the discharge nozzle, the pneumatic nozzle is installed at a position spaced apart from the cleaning liquid nozzle, a spray device for automated foam molding. The method according to claim 1,
Further comprising a sensor unit for detecting foreign substances in the discharge nozzle,
When a foreign material is detected inside the discharge nozzle, the control unit controls the washing unit to remove the foreign material from the discharge nozzle, an automated foaming spraying device.
The method according to claim 1 or 2,
The washing unit sprays the washing liquid in the direction of the discharge nozzle, an automated foaming spraying device.
delete delete The method according to claim 1 or 2,
The cleaning unit includes a brush for brushing the discharge nozzle, automatic foaming spraying device.
7. The method of claim 6,
The brush is, at least a portion of which is inserted into the discharge nozzle to brush the inside of the discharge nozzle, an automated foaming spraying device.
8. The method of claim 7,
The control unit, after brushing the inside of the discharge nozzle, after the brush exits from the inside of the discharge nozzle, to control to spray air from the pneumatic unit, automatic foaming spraying device.

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