KR102291027B1 - Two component polyurethane foam gun - Google Patents

Abstract

The present invention relates to a two-component polyurethane foam gun in which a urethane solution is mixed with a curing agent to foam an appropriate amount of the mixed polyurethane foam on a target. To this end, the two-component polyurethane foam gun according to the present invention includes: a foam gun body portion having a handle portion, a trigger lever, a trigger lever adjustment portion, and a supply connection portion to which a urethane storage container and a curing agent storage container are coupled; and a nozzle body coupled to the foam gun body and spraying polyurethane foam in which a urethane solution and a curing agent are mixed, and a mounting part is formed at the spraying end, wherein the injection nozzle member is fastened to the mounting portion in a shape to engage the injection end, at least two discharge holes for discharging the polyurethane foam are formed in the injection end, a cleaner container coupling port having a built-in cleaner solution is formed on the upper outer side of the foam gun body, and the inside has a structure in which a cleaner discharge passage for discharging the cleaner solution is formed.

Description

Two-component polyurethane foam gun {Two component polyurethane foam gun}

The present invention relates to a two-component polyurethane foam gun that mixes a urethane solution and a curing agent and then foams the mixed polyurethane foam to an object by an appropriate amount. It is an invention with improved durability and convenience compared to the 'urethane foam gun'.

Polyurethane Foam consists of a one-component type in which the main raw material, curing agent, and foaming agent are composed of a single solution, and a two-component type in which the main raw material and curing agent are separately formulated. Such polyurethane foam is widely used as an insulating material to block heat or a soundproofing material to absorb sound across various industrial fields, and in buildings, it is also used for repair work to fill gaps after insulation and soundproofing.

For these one-component or two-component foaming polyurethane foaming solutions, a separate foaming device stored in a pressure vessel is used, or in the case of a polyurethane foam foaming solution stored in a low-capacity pressure vessel, a pistol-type spray gun having a manual structure is mainly used. there is.

In addition, after using the polyurethane foam foaming device, for cleaning the polyurethane foaming solution remaining in the spraying device, for example, a method of washing with a separately provided compressed air spraying means is used.

Taking the prior art related to a pistol-type spray gun as an example in relation to the polyurethane foam foaming device, first, a pair of polyurethanes formed in the front upper part in Korean Patent Publication No. 10-0301169 (two-component polyurethane solution foaming gun) A pistol-type body consisting of a solution inlet, a pair of passages that communicate with the inlet, are formed so that the polyurethane solution is ejected at the front end, and a needle valve reciprocates, and a space formed so that a trigger can be inserted and moved downward in the center Wow; a needle valve inserted into the passage of the body to open and close the jet while reciprocating; a coil spring to always position the needle valve forward; a trigger inserted into the space of the body to reciprocate the needle valve; Disclosed is a two-component polyurethane solution foaming gun, which is inserted into the front jet of the body and configured to include a nozzle for mixing and spraying a two-component polyurethane solution jetted from the jet, Korean Patent Registration No. 10 -1016413 (two-component polyurethane foam syringe gun) containing a main agent or a curing agent, a spray can having a can screw nozzle on which the main agent or curing agent is discharged; a can holder for accommodating the spray cans in which the main agent or the curing agent is accommodated to be fixed, respectively, and for accommodating the spray cans so that the can screw nozzles of the respective spray cans are exposed to the outside; a valve setting cap having one end connected to the can screw nozzle of each spray can, and the other end being connected and fixed to one side of the can holder to simultaneously press the can screw nozzle; a discharge hose connected to each of the valve setting caps and into which the main agent or hardener discharged from the can screw nozzle is introduced; and a syringe gun comprising a discharge control unit for controlling the degree of inflow pressure of the main agent or curing agent introduced from the discharge hose, and a syringe portion for discharging the main agent or curing agent to the outside by mixing the inflowing agent or curing agent to rotate. The can holder may include a can receiving hole formed to accommodate the spray can; a can fixing part formed to correspond to the outer periphery shape of the spray can and supporting the outer periphery of the spray can; a can fixing groove formed concavely on one side of the can fixing part inwardly and fitted into a can groove formed on an outer periphery of the spray can; A locking plate elastically formed so that the belt is inserted and fixed; And it discloses a two-component polyurethane foam syringe gun comprising a; and a locking groove formed concavely on the other side of the locking plate.

Korean Patent Publication No. 10-1151983 (spray gun) discloses a coupling member having a coupling part to be coupled to a polyurethane container on the upper side; a spraying part provided on one side of the coupling part to spray the filling material filled in the container; a handle part provided on the other side of the coupling part and having a lever so that the filling material filled in the container is sprayed; And it is formed long in the longitudinal direction, one side is connected to the lever and the other side is located at the end of the injection unit, and moves back and forth in the longitudinal direction according to the operation of the lever and includes an opening/closing rod for opening or closing the end of the injection unit, , Disclosed is a spray gun further provided with an extension portion formed long in the longitudinal direction between the coupling portion and the handle portion or between the coupling portion and the spraying portion.

In addition, in Korea Patent Publication No. 10-2073293 (portable two-component polyurethane foam gun) previously applied by the present applicant, the foam gun body having a handle, a trigger lever, and a trigger lever adjusting part, a connecting member and a discharge member are sequentially applied. In the two-component polyurethane foam foam gun combined with a polyurethane solution storage container and a curing agent storage container coupled to the foam gun to spray urethane foam from the storage container, the foam gun body part is urethane on the upper end outside its end. A solution storage container coupling hole and a curing agent storage container coupling hole are formed, and a nozzle for discharging the polyurethane solution and curing agent of the storage container is installed to protrude to be inserted into the connection member at the end coupled to the connection member, The connecting member has a cleaner container coupling hole having a built-in cleaner solution on its outer upper end, and a cleaner discharge passage for discharging the cleaner solution is connected to the inside of the connecting member to mix the polyurethane solution and the curing agent sprayed from the nozzle. A space portion is formed, and the discharge member is a tubular shape having a predetermined diameter and length for secondary mixing, and the tip is disclosed as a foam gun comprising a nozzle portion having a smaller diameter.

However, in the device for foaming the one-component or two-component polyurethane as described above, a sticking phenomenon due to hardening of the solvent occurred in common after use, and this sticking phenomenon reduces the durability of the foaming device as well as the time consumed for washing. As a result, a problem occurred in that the total working time was long.

Korean Patent Publication No. 10-0301169 (two-component polyurethane solution foaming gun, announced on September 22, 2001) Korean Patent Publication No. 10-1016413 (two-component polyurethane foam syringe gun, announced on February 21, 2011) Korean Patent Publication No. 10-1151983 (Spray Gun, Announced on Jun. 1, 2012) Korean Patent Publication No. 10-2073293 (Portable two-component polyurethane foam gun, announced on February 4, 2020)

The present invention was devised to solve the problems of the prior art, and an object of the present invention is to prevent the sticking phenomenon due to hardening of the molten material after using the foam gun through a structure that can minimize the adhesion area of the molten material. To provide a two-component polyurethane foam gun.

Another object of the present invention is to provide a two-component polyurethane foam gun that can handle a foaming solution of a large capacity as well as a low capacity, and can be equipped with a cleaning agent for the remaining polyurethane foaming solution, so that the foaming gun can be used for a long time. .

However, the objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

The two-component polyurethane foam gun of the present invention for achieving the above object is a handle part 12, a trigger lever 14, a trigger lever adjustment part 16, a urethane storage container (UA), and a curing agent storage container (PA) the foam gun body portion 10 having a supply connection 18 is coupled; and a nozzle body 20 that is coupled to the foam gun body 10 and sprays polyurethane foam in which a urethane solution and a curing agent are mixed, and a mounting portion 22 is formed at the spray end 24; In the urethane foam gun (G), the injection nozzle member 30 is fastened to the mounting portion 22 in a shape to mesh with the injection end 24, and the injection end 24 has a discharge for discharging the polyurethane foam. At least two or more balls 24A are formed, and a cleaner container coupling hole 11 having a cleaner solution is formed at the top of the outer top of the foam gun body 10, and the cleaner solution is discharged inside. It has a structure in which the cleaner discharge passage 13 is formed.

The present invention is configured to be able to process a large-capacity foaming solution, and a transfer pump control unit (TA) for controlling the transfer pump of the large-capacity storage container is added to the inside of the handle 12 of the foam gun body 10. can be installed The injection button TB of the transfer pump control unit TA is formed to protrude toward the trigger lever 14, and as the transfer pump control unit TA is interlocked according to the reciprocating operation of the trigger lever 14, the transfer pump control unit is turned on. It consists of a structure that turns /OFF.

In addition, the present invention is to increase the efficiency of the inflow of the urethane solution and the curing agent flowing in through the supply connection 18 provided in the foam gun body 10, the supply connection 18 of the foam gun body 10 is discharged. Provided with a guide passage having an inner diameter greater than the ball 24A, the guide passage may be formed so that the inner diameter gradually increases along the injection direction of the urethane solution and the curing agent.

In addition, in the present invention, in order to prevent the solution foamed through the discharge hole from sticking and hardening, the inner diameter of the discharge hole 24A is formed to be 1.0 - 2.0 mm, and the inner diameter of any one discharge hole among the plurality of discharge holes may be formed to be larger or smaller than the inner diameter of the remaining discharge holes. In addition, as another configuration to prevent sticking and hardening, on the trigger lever 14 side of the foam gun body 10, a connecting member 19 horizontally connected to the trigger lever 14 is installed in the foam gun body portion. It is possible to form an insertion groove 17 that can reciprocate according to the operation of the trigger lever 14 in the interior (10), and at one side of the insertion groove 17 formed inside the foam gun body 10 An O-ring (17A) having a hollow shape with a size sufficient to penetrate the insertion groove is provided.

In addition, the present invention provides a space in which the urethane solution and the curing agent introduced into the supply connection part 18 of the foam gun body 10 are mixed with each other so that the urethane solution and the curing agent can be homogeneously mixed. It is possible to install a mixing screw (M) formed of a spiral blade.

In addition, in the present invention, in order to further improve the foaming efficiency of the polyurethane foam, the injection end 24 has an air injection hole 24B for injecting high-pressure air to the remaining area of the area in which the discharge hole 24A is formed. Two or more can be formed.

According to the two-component polyurethane foam gun of the present invention, since the area in which the solvent can be fixed can be minimized, it is possible to prevent the sticking phenomenon due to the curing of the solvent after using the foam gun, thereby securing the durability of the device. and ease of use.

In addition, it is possible to process a large-capacity foaming solution as well as a low-capacity, and it is possible to install a cleaning agent for the remaining polyurethane foaming solution, so that it can be selectively used according to the purpose.

1 to 2 are views showing the overall appearance and cross-section of a two-component polyurethane foam gun according to the present invention;
3 is a perspective view showing a state in which a urethane solution storage container, a curing agent storage container and a cleaner storage container are mounted on the foam gun of FIG. 1;
4 is a perspective view showing a longitudinal section and a cross section of the H portion shown in FIG. 3;
Figure 5 is a view for showing the coupling relationship of the trigger lever and the control unit mounted inside the handle portion of the foam gun shown in Figure 1;
Figure 6 is a view showing a cross section of the nozzle body of the foam gun shown in Figure 1;

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, if it is determined that a detailed description of a related well-known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 to 2, the two-component polyurethane foam gun according to the present invention has a handle portion 12, a trigger lever 14, a trigger lever adjustment portion 16, and a urethane storage container (UA). and a foam gun body portion 10 having a supply connection portion 18 to which a curing agent storage container (PA) is coupled; and a nozzle body 20 coupled to the foam gun body 10 and spraying polyurethane foam in which a urethane solution and a curing agent are mixed, and a mounting part 22 is formed at the spraying end 24; The injection nozzle member 30 is fastened to the mounting portion 22 in a shape to mesh with the injection end 24, and the injection end 24 has at least two discharge holes 24A for discharging the polyurethane foam. A structure in which a cleaner container coupling hole 11 having a cleaner solution embedded therein is formed on the outer upper end of the foam gun body 10, and a cleaner discharge passage 13 for discharging the cleaner solution is formed inside the foam gun body 10 is made of

The two-component polyurethane foam gun of the present invention is basically configured to include a foam gun body 10 and a nozzle body 20. At this time, it is preferable that the foam gun body portion 10 and the nozzle body 20 are detachably coupled to each other.

The foam gun body portion 10 according to the present invention has a cleaner container coupling hole 11, a handle portion 12, a cleaner discharge passage 13, a trigger lever 14, and a trigger lever having a cleaner solution built-in at the top of the outside. It has an adjustment part 16, an insertion groove 17, a supply connection part 18 and a connection member 19, and the foam gun body part 10 has a urethane solution storage container coupling port and a curing agent at the outer upper end of the end side. A storage container coupling hole is formed.

According to an embodiment of the present invention, the supply connection portion 18 of the foam gun body 10 may have a guide passage having an inner diameter greater than that of the discharge hole 24A, and the guide passage is made of a urethane solution and a curing agent. It can be formed so that the inner diameter gradually increases along the injection direction. According to the configuration as described above, there is an advantage that can increase the inflow efficiency of the urethane solution and the curing agent flowing in through the supply connection portion 18 provided in the foam gun body 10 .

The nozzle body 20 has a tubular shape having a predetermined diameter and length, and the tip is formed as a spray end 24 having a smaller diameter. The injection end 24 formed at the end of the nozzle body 20 has a mounting portion 22 , so that the injection nozzle member 30 can be appropriately selected and coupled to the mounting portion 22 . The injection nozzle member 30 is manufactured in various standard lengths, so that it is possible to select and use a spray nozzle member of an appropriate standard according to the construction site.

On the other hand, according to the present invention, without mounting the injection nozzle member 30 to the mounting portion 22, the polyurethane foam may be foamed at the foaming target point only through the discharge hole 24A formed in the injection end 24. there is. That is, when the working space is narrow or precise work is not required, the foaming operation can be performed without the need to mount the spray nozzle member 30 to the mounting part 22 .

In the two-component polyurethane foam gun according to the present invention, a urethane storage container (UA) and a curing agent storage container (PA) can be mounted through the supply connection part 18 , and the urethane storage container mounted on the supply connection part 18 . (UA) and the polyurethane foam solution and the curing agent in the curing agent storage container (PA) are mixed through the nozzle body 20 by the operation of the trigger lever 14 and sprayed to the outside to form polyurethane foam, and the trigger lever adjustment It consists in controlling the discharge amount of the polyurethane foam main agent and curing agent while adjusting the clearance of the trigger lever 14 by the part 16 .

Therefore, the discharge of the main agent and the curing agent is controlled by using the trigger lever 14, and at the same time, the main agent and curing agent are discharged to the spray nozzle member 30 along the nozzle body 20, for example, the main agent and curing agent using the trigger lever 14. Discharge of the product and discharge through the two-component spray nozzle member 30 may be applied in a general way. In addition, by rotating the trigger lever control unit 16, the clearance length of the trigger lever 14 can be slightly changed, and it is fixed to the disc-shaped trigger lever control unit 16 and inserted into a two-component polyurethane foam gun. The circular frame to be used advances and reverses the upper region of the trigger lever 14 to generate play, and the discharge amount of the main agent and the hardener and the discharge amount through the spray nozzle member 30 are controlled according to the spaced distance.

According to a modified embodiment of the present invention, the lever control unit 16 controls the discharge amount of the main agent and the curing agent, as well as when the lever control unit 16 is pressed (pressed) to the injection end 24 by a hydraulic mechanism. The formed discharge hole (24A) can be controlled so that the polyurethane foam is foamed. In this case, the parts required to implement the hydraulic operation mechanism can be applied to the present invention by appropriately modifying commercially available parts.

Figure 3 is a perspective view of the main part of a state in which a urethane storage container (UA), a curing agent storage container (PA) and a cleaner storage container (reference numeral not shown) are mounted on the two-component polyurethane foam gun according to the present invention.

3, a urethane storage container (UA) and a curing agent storage container (PA) in the supply connection part 18 formed in the foam gun body part 10 of the two-component polyurethane foam gun (G) according to the present invention are installed respectively.

In addition, a cleaner storage container is mounted on the cleaner container coupling port 11, and a cleaner control lever for controlling discharge of the cleaner from the cleaner storage container can be installed in the cleaner container coupling hole 11.

4 is a perspective view showing the horizontal and vertical cross sections of part H of FIG. 3 , and as shown in FIG. 4 (A), the foam gun body 10 according to the present invention has an end coupled to the nozzle body 20 A nozzle for discharging the polyurethane foam solution and the curing agent to the side is installed to protrude so as to be inserted into the nozzle body 20 and is coupled to the nozzle body.

In addition, as shown in Fig. 4 (B), inside the nozzle body 20, a space where the urethane solution and the curing agent are mixed is formed to communicate with the cleaner discharge passage 13, and when the foaming construction is completed, the cleaner control By opening the lever, the cleaner flows into the space where the urethane solution and the curing agent are mixed through the cleaner discharge passage 13 , and the remaining urethane solution and curing agent are washed and discharged to the outside of the nozzle body 20 .

4 (A) and (B), the nozzle installed to protrude from the foam gun body portion 10 of the present invention is a mixing space so that the end of the urethane solution and the curing agent discharged from the nozzle are mixed in the mixing space. It consists of being formed to be positioned up to the entrance side.

On the other hand, the discharge hole formed in the injection end 24 of the nozzle body 20 may have an inner diameter of 1.0 to 2.0 mm, and the inner diameter of any one of the plurality of discharge holes is the inner diameter of the other discharge holes. It may be formed larger or smaller. This is to prevent the solution foamed through the discharge hole 24A from sticking and hardening. According to an embodiment of the present invention, as shown in FIG. 6 , the trigger lever ( On the side 14), an insertion groove 17 can be formed in which the connecting member 19 horizontally connected to the trigger lever 14 can reciprocate according to the operation of the trigger lever 14 inside the foam gun body 10. In addition, one side of the insertion groove 17 formed inside the foam gun body 10 is provided with an O-ring 17A having a size large enough to penetrate the insertion groove and forming a hollow. .

5 is a view showing the coupling relationship between the control unit and the trigger lever 14 mounted inside the handle portion 12 of the two-component polyurethane foam gun of the present invention, which is employed to use a large-capacity urethane solution and a curing agent.

5, a transfer pump control unit TA for controlling a transfer pump (not shown) of a large-capacity storage container is installed inside the handle 12 of the foam gun body 10, and the transfer pump The injection button TB of the control unit TA is formed to protrude toward the trigger lever 14, and the transfer pump control unit TA is interlocked according to the reciprocating operation of the trigger lever 14 to turn the transfer pump control unit ON or OFF. made of

In the case of foaming using a large-capacity urethane solution and curing agent using the two-component polyurethane foam gun (G) of the present invention, the urethane storage container (UA) and the curing agent storage container (PA) of the foam gun body 10 Connect the transfer pipe of the urethane solution and the curing agent to the nozzle body 20 while controlling the transfer pump of the urethane solution and the curing agent by the operation of the transfer pump control unit TA, the injection button TB and the trigger lever 14 While mixing the urethane solution and the curing agent through the spray to the outside to form a polyurethane foam.

In addition, as shown in Figure 2, the two-component polyurethane foam gun (G) according to the present invention is an air powder for spraying high-pressure air to the remaining area of the area in which the discharge hole 24A is formed at the injection end 24. By forming at least two or more holes 24B, the foaming efficiency of the polyurethane foam can be further improved.

In addition, as shown in FIG. 5, the two-component polyurethane foam gun (G) according to the present invention installs a mixing screw (M) formed with a spiral blade inside the connecting member 20 to add a urethane solution and a curing agent. Secondary mixing is made to more homogeneously mix the urethane solution and the curing agent, and since the mixing screw (M) is manufactured and marketed in various forms, it can be easily purchased and used by those skilled in the art to which the present invention belongs. A detailed description will be omitted.

As described above, an embodiment of the two-component polyurethane foam gun according to the present invention has been described with the accompanying drawings, but this is an exemplary description of a preferred embodiment of the present invention and does not limit the present invention. In addition, it is obvious that various modifications and imitations are possible within the scope without departing from the technical spirit of the present invention by those of ordinary skill in the art.

G: foam gun of the present invention M: mixing screw
UA: Urethane storage container PA: Hardener storage container
TA: Transfer pump control unit TB: Injection button
10: foam gun body part 11: cleaner container coupling port
12: handle part 13: cleaner discharge passage
14: trigger lever 16: trigger lever adjustment part
17: insertion groove 17A: O-ring
18: supply connection 19: connecting member
20: nozzle body 22: mounting part
24: injection end 24A: discharge hole
24B: air injection hole 30: injection nozzle member

Claims (7)

A foam gun body having a handle 12, a trigger lever 14, a trigger lever adjusting part 16, and a supply connection part 18 to which the urethane storage container (UA) and the curing agent storage container (PA) are coupled. (10); and a nozzle body 20 that is coupled to the foam gun body 10 and sprays polyurethane foam in which a urethane solution and a curing agent are mixed, and a mounting portion 22 is formed at the spray end 24; In the urethane foam gun (G),
The injection nozzle member 30 is fastened to the mounting part 22 in a shape to mesh with the injection end 24,
Two discharge holes 24A having inner diameters of 1.4 mm and 1.5 mm, respectively, are formed in the injection end 24 at a spaced interval,
A cleaner container coupling hole 11 having a cleaner solution embedded therein is formed on the upper outer side of the foam gun body 10, and a cleaner discharge passage 13 for discharging the cleaner solution is formed inside the foam gun body 10,
A pair of air injection holes 24B for injecting high-pressure air into the remaining area of the area where the discharge holes 24A of the injection end 24 are formed are formed at a spaced apart distance from each other,
A transfer pump control unit TA for controlling the transfer pump of the large-capacity storage container is installed inside the handle 12 of the foam gun body 10, and the injection button TB of the transfer pump control unit TA is a trigger A two-component polyurethane foam gun, which is formed to protrude toward the lever 14 and turns ON/OFF the transfer pump control unit while the transfer pump control unit (TA) is interlocked according to the reciprocating operation of the trigger lever (14). delete According to claim 1,
The supply connection portion 18 of the foam gun body portion 10 has a guide passage having an inner diameter greater than the discharge hole 24A,
The two-component polyurethane foam gun, characterized in that the guide passage is formed such that the inner diameter gradually increases along the injection direction of the urethane solution and the curing agent. delete According to claim 1,
On the trigger lever 14 side of the foam gun body 10, a connecting member 19 horizontally connected to the trigger lever 14 reciprocates according to the trigger lever 14 operation inside the foam gun body 10. A movable insertion groove (17) is formed, and on one side of the insertion groove (17) formed inside the foam gun body (10), a hollow is formed with a size large enough to penetrate the insertion groove. - A two-component polyurethane foam gun, characterized in that it is provided with a ring (17A). According to claim 1,
A mixing screw (M) formed as a spiral blade is installed inside the nozzle body (20), which is a space where the urethane solution and the curing agent introduced into the supply connection part (18) of the foam gun body part (10) are mixed with each other. A two-component polyurethane foam gun. delete

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