KR101557687B1

KR101557687B1 - Polyurea spray gun

Info

Publication number: KR101557687B1
Application number: KR1020150055908A
Authority: KR
Inventors: 박선연; 윤덕주; 윤재상
Original assignee: 박선연
Priority date: 2015-04-21
Filing date: 2015-04-21
Publication date: 2015-10-06

Abstract

The present invention relates to a polyurea spraying device which is supplied with a polyurea subject and a curing agent through a separate device, and injects the mixture by high-pressure mixing and collision. The polyurea spraying device comprises a body, a connection part connected to the body, A cleaning part connected to the connection part to receive a polyurea main body and a hardening agent from the connection part and to receive a cleaning agent from a separate device and a side surface to be connected to the cleaning part, And a mixed jetting unit for jetting the mixed jet after a high-pressure mixing impact.

Description

Polyurea spray gun < RTI ID = 0.0 >

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyurea sprayer, and more particularly, to a polyurea sprayer designed to supply and discharge a subject of a polyurea and a hardener, and to facilitate internal cleaning.

Polyurea is one of the coatings for waterproofing flooring. It was developed by American TEXCO in the 1980s. Polyurea is applicable to various fields because it has excellent extensibility and durability like epoxy and urethane paint. It can be applied not only on the bottom but also on the slope surface because it has a hardening time and does not flow down. In order to use polyurea, it is necessary to keep the viscosity of the main (isocyanate) and the curing agent (amine resin) at a high temperature of 70 degrees Celsius or more separately and to spray at a high pressure of 150 bar or more. In addition, since the polyurea starts to gel within 3 to 5 seconds after the subject and the curing agent come into contact, it is important to spray the polyurea subject and the curing agent by high-pressure collision in a short time.

There are several ways to spray paints or liquids. Among them, air spray method and airless spray method are typically used to use polyurea. The air spray method is a method in which a device for injecting compressed air is connected to an injection port to mix the polyurea with air, and air holes are formed on the paint coated with air, resulting in poor paint quality, And it is the most widely used painting method because it is easy to use and has a soft finish quality.

The airless spray method is a method in which the spray is atomized by spraying with a small hole nozzle by directly applying pressure to the paint in a sealed container. The spraying method can maximize the yield as compared with the air spray method, and the yield can be maximized. The working speed is also not comparable to the air spray method. In addition, it has an advantage that it can efficiently coat the same area with a small amount of paint, and uniformly forms surface quality, coating formation, gloss and density. However, due to the nature of the paint, polyurea is required to supply the base and curing agent at high pressure. Therefore, it is necessary to supply high pressure hose and polyurea subject to withstand high pressure and a separate device capable of delivering the curing agent at high pressure. Because of the need to maintain, the paint supply and connection to the high pressure hose required hot wire. Therefore, the airless spray method has a disadvantage in that power consumption is large, and the internal control device does not retain the high pressure, so that the internal paint often flows out when it is not desired. However, recently, the polyurea that can be used at room temperature has been developed, and the airless spray method is widely used while solving the disadvantage of large power consumption.

Korean Unexamined Patent Publication No. 2000-0056620 ("liquid-type polyurethane solution foaming gun ", 2000.09.15, hereinafter referred to as Prior Art 1) discloses a liquid polyurethane solution foaming gun. 1 shows one embodiment of the prior art 1. More specifically, Prior Art 1 discloses a liquid polyurethane solution in a foaming agent distribution system in which two or more fluid components are mixed and the mixed curing foaming agent is injected and dispensed in an appropriate amount, It is about foam guns. Prior Art 1 is an airless type in which two fluid components are mixed and foamed. However, there is no constitution of mixing collision to be applied to a polyurea, and needle portions for controlling the supply of fluid components are thin and weak and are difficult to apply to high-pressure polyureas . Further, there is a problem that it is inconvenient to reuse because there is no separate structure for washing the inside.

Korean Patent Publication No. 2000-0056620 ("liquid-type polyurethane solution foaming gun ", 2000.09.15)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a polyurea spraying apparatus having a structure capable of effectively controlling a curing agent, Device.

In order to accomplish the above object, the present invention provides a polyurea spraying apparatus comprising a body 100, a body 100, (200) connected to the polyurea main body (100) and supplied with a polyurea main body and a hardening agent from a separate device, and a polyurea main body and a hardening agent are supplied from the connecting part (200) A cleaning part 300 for supplying a cleaning agent from a separate device, and a mixing part 300 for supplying a polyurea main body and a curing agent from the cleaning part 300, one side of which is connected to the cleaning part 300, (400).

Also, the body 100 includes a grip 110 that can be gripped.

The connection unit 200 includes a trigger 210 which is spaced apart from the handle 110 by a predetermined distance from the body 100 and is connected to the body 100 and includes a polyurea main body and a curing agent And two connecting chambers 220 respectively connected to the trigger 210 and two connecting chambers 220. Each of the connecting chambers 220 is connected to the trigger 210 through one end of the connecting chamber 220, The outlet of the needle 250 is connected to the needle 250 and the connection chamber 220 so that the outlet of the needle 250 is connected to the outlet of the connection chamber 220, And a seat 260 opened and closed by the other side end.

In addition, the connection unit 200 may include a main connection unit 230 and a connection unit 220, which are connected to the main chamber 230 and the connection chamber 220, And a hardener connecting portion 240 connecting the pipe through which the hardener supplied from the apparatus passes.

The cleaning unit 300 includes a manifold 310 through which the polyurea main body and the hardener are supplied through the connection unit 200 and a cleaning agent connection unit 320 for connecting the pipe through which the cleaning agent supplied from the separate supply unit is connected ).

The mixing and injecting unit 400 includes a mixing chamber 410 connected to the washing unit 300 and mixing the polyurea main body supplied from the washing unit 300 with a curing agent, A mixer element 420 for mixing the polyurea main body and the curing agent, and a nozzle 430 provided at a nozzle for injecting a curing agent and a polyurea mixture mixed in the mixing chamber 410.

According to the polyurea spraying apparatus of the present invention, the polyurea main body and the curing agent supplied at a high pressure can be efficiently controlled by providing the seat and the needle which are combined in the form of blocking one of the connecting chambers.

Further, according to the polyurea spraying apparatus of the present invention, the inside of the polyurea spraying apparatus can be easily cleaned with the cleaning unit, and there is no need to disassemble and clean the spraying apparatus.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows a conventional liquid polyurethane solution foaming gun.
2 is an exploded perspective view of an embodiment of the present invention.
3 is a perspective view of one embodiment of the present invention.
4 is an internal cross-sectional view of one embodiment of the present invention.
5 is an enlarged cross-sectional view of one embodiment of the present invention.

Hereinafter, a polyurea spraying apparatus according to the present invention having the above-described structure will be described in detail with reference to the accompanying drawings.

An embodiment of the polyurea spraying apparatus according to the present invention is a polyurea spraying apparatus which receives a polyurea subject and a curing agent through a separate apparatus, A washing unit 300, and a mixing / injecting unit 400. The body 100 includes a connecting part 200, a cleaning part 300, Further, the polyurea spraying apparatus according to the present invention is a device which receives a polyurea subject and a curing agent at a high pressure, and injects the polyurea subject and the curing agent by high-pressure mixed collision, and is therefore made of a material having strength capable of withstanding high pressure.

FIG. 2 is an exploded perspective view of the polyurea spraying apparatus, and FIG. 3 is a combined perspective view showing a combination of the structure of the polyurea spraying apparatus shown in FIG. 2 and 3, the connection unit 200 is connected to the body 100 and receives a polyurea subject and a hardening agent from a separate device. The trigger 210, the connection chamber 220, A top connecting portion 230, a hardener connecting portion 240, a needle 250, and a sheet 260. [

The trigger 210 is spaced apart from the handle 110 by a predetermined distance, and determines whether the polyurea main body and the curing agent are supplied or not according to the forward and backward flow. The trigger 210 is hinged to the coupling pin 120 shown in FIG. When the user pulls or releases the trigger 210, the trigger 210 pivots about the coupling opening 120. When the trigger 210 is pulled, the polyurea main body and the hardener are mixed and injected, and the injection is stopped when the trigger 210 is placed. A separate safety device 211 for limiting the operation of the polyurea injection device may be provided at a portion where the trigger 210 flows, by blocking the flow of the trigger 210 back and forth. The safety device 211 may be rotated to stop the operation of the trigger 210 or to release the restriction. The coupling unit 120 may further include a delay unit for returning the trigger 210 to the home position after a predetermined time without returning to the home position when the trigger 210 is pulled. The delay device is a device for supplying the polyurea for the same time so as to be able to inject a certain amount of time, and it is possible to adjust the amount of injection by adjusting the delay time.

Two connecting chambers 220 are connected to the body 100, and a polyurea main body and a hardening agent are introduced into the connecting chamber 220, respectively. The connection chamber 220 receives the polyurea base and the curing agent and serves as a kind of passage for supplying the polyurea base and the curing agent to the cleaning unit 300.

The main connection unit 230 connects the one of the connection chambers 220 and a pipe through which the main body supplied from a separate supply unit is passed.

The curing agent connecting part 240 connects a tube through which the curing agent supplied from the other connecting chamber 220 is supplied. The main connecting part 230 and the curing agent connecting part 240 may be further provided with a valve for preventing supply of the polyurea main body and the curing agent.

One end of the needle 250 is connected to the trigger 210 and flows back and forth in accordance with the flow of the trigger 210.

The seat 260 is coupled to one side of the connection chamber 220 and has an outlet through which the main body or the hardening agent introduced into the connection chamber 220 is discharged. As shown in Fig. FIG. 4 is a sectional view of the inner side of the connection chamber 220, and FIG. 5 is an enlarged view of the connection chamber 220 shown in FIG. FIGS. 4 and 5 illustrate the connection of the main connection 230 among the two connection chambers 220. Since the two connection chambers 220 are equally symmetrical, FIGS. 4 and 5 are also applied to the connection chamber 220 to which the curing agent connection unit 240 is connected. As shown in FIG. 5, the other end of the needle 250 is provided in such a manner as to block an outlet formed through the seat 260, and a spring is inserted into the stop. When the user pulls the trigger 210, the spring inserted into the stop of the needle 250 is compressed and the other end of the needle 250 is pulled in the direction of the arrow, The polyurea main body and the curing agent introduced into the connection chamber 220 are discharged. The other side end of the needle 250 is suitable for controlling the polyurea main body and the curing agent which are supplied at a high pressure due to a large area and a large closing area of the discharge port than the conventional needle part in the form of an elongated needle. When the user releases the trigger 210, the compressed spring is resiliently restored and the other end of the needle 250 is pushed in the opposite direction of the arrow to close the discharge port of the seat 260. In order to prevent the polyurea subject or the hardening agent moving at a high pressure, the spring used for the needle 250 uses a high elasticity.

The cleaning unit 300 is connected to the connection unit 200 at one side thereof to receive the polyurea main body and the hardening agent from the connection unit 200 and receives a cleaning agent from a separate device. And a cleaning agent connection part 320.

The manifold 310 receives the polyurea base and the curing agent through the connecting portion 200. The manifold 310 is a point at which the polyurea main body and the curing agent first meet, and serves as a kind of passage for discharging the polyurea main body and the curing agent, which are mutually encountered, to the mixing / injecting part 400.

The detergent connection part 320 connects a pipe through which the cleaning agent supplied from the separate device to the manifold 310 passes. The manifold 310 receives a cleaning agent from a separate device through the detergent connection part 320. Unlike the main and curing agent, the detergent connection part 320 can not be controlled by the trigger 210, so that a separate lock valve is additionally provided to control the supply of the cleaning agent or to control the supply of the cleaning agent from a separate apparatus. The detergent supplied from the separate apparatus flows into the passage through the polyurea main body and the hardening agent to wash away the residual polyurea main body and the hardening agent. It is important to clean the inside of the polyurea spray device within a short period of time after the end of the work because the polyurea subject and the curing agent proceed to cure quickly when they are in contact with each other. The polyurea spraying apparatus of the present invention can easily and conveniently clean the inside of the spraying apparatus by using the detergent connecting unit 320. [ The polyurea main body and the curing agent remaining in the connection chamber 220 can not be cleaned even if the detergent connection part 320 is used. However, since the polyurea main body and the curing agent are not hardened unless mixed with each other at high pressure, (220) need not be cleaned.

The mixing and spraying unit 400 is connected to the cleaning unit 300 at one side thereof and is supplied with the polyurea main body and the hardener from the cleaning unit 300 and injects the mixture after the high-pressure mixing collision. The mixing chamber 410, (420) and a nozzle (430).

The mixing chamber 410 is connected to the cleaning unit 300, and the polyurea main body supplied from the cleaning unit 300 and the curing agent are mixed therein. The mixing chamber 410 serves as a kind of passage for introducing the polyurea main body and the hardening agent from the cleaning part 300 and discharging the polyurea main body to the nozzle 430 like the connection chamber 220. The difference from the connection chamber 220 is that the polyurea base and the curing agent are mixed with each other.

The mixer element 420 is provided in the mixing chamber 410 and rotates to mix the polyurea base and the curing agent. The mixer element 420 is formed in a long bar shape. The surface of the mixer element 420 is spirally or irregularly projected to facilitate mixing of the curing agent with the polyurea main body introduced into the mixing chamber 410.

The nozzles 430 are provided in the mixing chamber 410 with a polyurea mixed therein and a jetting port through which the curing agent is injected. The nozzle 430 functions to atomize the mixed polyurea base and the curing agent. The blended polyurea base and curing agent should be jetted at a pressure of 150 bar or more to facilitate atomization. For this purpose, the polyurea base and the curing agent should be supplied at a pressure higher than the above-mentioned pressure through a separate device.

In the polyurea spraying apparatus having all the above configurations, the polyurea main body supplied at a high pressure and the curing agent are supplied, mixed, collided and sprayed. Particularly, when polyurea which can be used at room temperature is used, there is an advantage that it is convenient to use because it is only necessary to clean the mixed injection part 400 through the washing part 300 without washing the connection chamber 220.

100: body 110: handle
120: coupling part 130: connecting pin
200: connecting part 210: trigger
211: safety device 220: connection chamber
230: Top connecting part 240: Curing agent connecting part
250: Needle 260: Sheet
300: Cleaning part 310: Manifold
320: Cleaner connection
400: mixing / injecting part 410: mixing chamber
420: mixer element 430: nozzle

Claims

A polyurea spraying device that receives a polyurea subject and a curing agent through a separate device,
A body (100) comprising a grip (110) capable of being gripped;
A connection part 200 connected to the body 100 and supplied with a polyurea subject and a curing agent from a separate device;
A cleaning part 300 having one side connected to the connection part 200 to receive the polyurea main body and the hardening agent from the connection part 200 and to receive the cleaning agent from a separate device; And
A mixing and injecting part 400 connected to the washing part 300 at one side thereof to receive the polyurea main body and the hardener from the washing part 300 and inject the mixture after high pressure mixing collision;
Lt; / RTI >
The connection part 200 includes a trigger 210 which is spaced apart from the handle 110 by a predetermined distance from the body 100,
Two connection chambers 220 connected to the body 100 and each containing a polyurea main body and a hardener,
Two needles 250 and 250 that are respectively inserted through the inside of the connection chamber 220 and connected to the trigger 210 at one end thereof and flow back and forth in accordance with the flow of the trigger 210,
And a discharge port through which a hardener introduced into the connection chamber 220 is discharged is formed in the connection chamber 220. The discharge port is opened and closed by the other end of the needle 250, And a sheet (260)
The trigger 210 is provided with a delay device for returning to a home position after a predetermined time by releasing the trigger 210,
Wherein the needle (250) has a curved surface at the other side.

delete

The connector according to claim 1, wherein the connection part (200)
A main connection part 230 connecting a connection pipe 220 to a pipe through which a subject supplied from a separate supply device is connected; And
A curing agent connection part 240 connecting a tube through which the curing agent supplied from the other connection chamber 220 and the other supply device is connected;
Wherein the polyurea spraying device further comprises:

The washing machine according to claim 1, wherein the washing unit (300)
A manifold 310 supplied with the polyurea main body and the curing agent through the connection part 200; And
A cleaning agent connection part 320 connecting the pipe through which the cleaning agent supplied from the separate supply device passes;
Wherein the polyurea spraying device comprises:

[3] The apparatus of claim 1, wherein the mixing / injecting unit (400)
A mixing chamber 410 connected to the cleaning unit 300 to mix the polyurea main body supplied from the cleaning unit 300 with a curing agent;
A mixer element (420) provided inside the mixing chamber (410) and mixing the polyurea subject and the curing agent; And
A nozzle 430 provided at a nozzle for injecting a curing agent and a polyurea mixture mixed in the mixing chamber 410;
Wherein the polyurea spraying device comprises: