KR102028039B1 - Foam Mixing Head device having a cleaning function - Google Patents

Abstract

The present invention relates to a foam mixing head device having a cleaning function, which comprises: a main body unit having an operation rod having a mixed discharge line through which a main agent and a curing agent are mixed to be discharged, a head body in which the operation rod is assembled to reciprocate to a guide hole, and a head cover assembled to the head body by forming a central hole in which the operation rod is arranged; a main agent supply unit provided in the head body to supply the main agent by selectively communicating with the mixed discharge line; a curing agent supply unit provided in the head body to supply the curing agent by selectively communicating with the mixed discharge line; an operating unit for reciprocating the operation rod forward and backward by accommodating a piston provided at an end of the operation rod in a space of a cylinder body coupled to the head body; and a cleaning unit having an air main line for branching, in the head body, a first air branch line selectively communicating with the mixed discharge line and a second air branch line communicating with a head space formed between the head cover and the head body, and separately supplying air to the mixed discharge line and the head space through the first and second air branch lines.

Description

Foam mixing head device having a cleaning function

The present invention relates to a foam foam mixing head device, and more particularly, to clean the inside of the flow path through which the mixed raw material is discharged by air, and to process the foam spraying by mixing the main material and the hardener raw material before and after the operation rod. The present invention relates to a foam foam mixing head device having a cleaning function that can be repeatedly performed according to a true cycle.

In general, foamed polyurethane foam products are generally classified into low pressure foaming and high pressure foaming. In the high pressure foaming method, a raw material composed of a main material and a curing agent is sprayed at high pressure through a nozzle and mixed by a collision force. It is injected into a mold and foam-molded in a mold.

The foaming machine to which the high pressure foaming method is applied is composed of a raw material tank, a pump, a mixing head, a driving hydraulic device, and an electric and electronic control device. In particular, the mixing head is a device for mixing and injecting raw materials. It is the key to determining the quality of foam products.

Meanwhile, the foamed polyurethane foam (hereinafter, foamed foam) is produced through a burette reaction of a main polyol (POLYOL) and a hardener isocyanate (ISOCYANATE), the polyol is an aliphatic compound having two or more active hydrogens (OH), The isocyanate is a compound having an isocyanate group (NCO), and the mixing ratio of the main material (polyol) and the curing agent (polyisocyanate), which are raw materials of the foam, may be about 1: 1 to 2: 1.

And three methods are known as a method of mixing and foaming two or more undiluted solutions.

The first method is to mix by using the flow in the tube by using a static mixer (STATIC MIXER), the second method is to use a dynamic mixer (DYNAMIC MIXER), the mechanical mixing by the rotation of the blade (BLADE) The third method is a method using high pressure injection (HIGH SPEED OF THE STREAMS AND JETS), which is a method of mixing by using a high pressure impact of the fluid.

In the process of forming a double urethane foam, the main body and the curing agent are mixed by using a high pressure spray, because the isocyanate, which is a stock solution, reacts with the polyol but reacts with water and also reacts with water, and also reacts with itself. This is because the foaming efficiency of the desired performance can be obtained by increasing the mixing efficiency.

(Patent Document 1) KR10-1705518 B1

Patent Document 1 forms an air inlet and an injection hole connected to the lower end of the discharge pipe in which the liquid foamed resin is finally ejected, and is lifted when the lifting rod for removing the remaining foamed synthetic resin in the discharge pipe is lowered while being inserted into the discharge pipe. A lifting rod-linked gas injection cleaning foam resin injection device is disclosed which prevents the formation of deposits in the discharge pipe and the lifting rod by feeding gas such as compressed air into an air inlet and spraying the injection holes in conjunction with the rod.

However, the lifting rod interlocking type gas injection cleaning foamed synthetic resin ejection apparatus disclosed in Patent Document 1 is used to discharge the air from the air supply unit provided in the lower end of the discharge pipe and the air supply unit discharged from the longitudinal air supply unit formed inside the lifting rod. Only the foamed synthetic resin remaining at the end of the discharge tube and the end of the elevating rod can be cleaned, while the entire inner surface of the discharge tube from which the foamed synthetic resin is discharged cannot be completely cleaned, and the foam remaining on the inner surface of the discharge tube can be cleaned. The malfunction of the lifting rod was frequently caused by the resin.

Accordingly, the present invention is to solve the problems described above, the object is to clean the inside of the flow path through which the mixed material is discharged while the main material and the curing agent raw material is recycled by air, and the main and hardener An object of the present invention is to provide a foam foam mixing head apparatus having a cleaning function capable of repeatedly performing foam spraying by mixing raw materials in accordance with a forward and backward cycle of an operating rod.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned above will be clearly understood by those skilled in the art from the following description. Could be.

As a specific means for achieving the above object, a preferred embodiment of the present invention has an operating rod that forms a mixed discharge line for discharging the main body and the curing agent are mixed with each other, the operating rod is reciprocating to the guide hole A main body having a head body to be assembled and including a head cover assembled to the head body by forming a central hole in which the operation rod is disposed; A main body supply unit which is provided in the head body to selectively communicate with the mixed discharge line; A hardener supply unit provided in the head body to selectively communicate with the mixed discharge line to supply a hardener; An operation unit configured to reciprocate the operation rod forward and backward by accommodating a piston provided at an end of the operation rod in a space of the cylinder body coupled to the head body; And an air main line formed in the head body to supply air, and having a first air branch line branched from the air main line to the guide hole and selectively communicating with the mixed discharge line, the air main line And a second air branching line branched from the head cover to the head cover and selectively communicating with a head space formed between the head cover and the head body, through the first and second air branching lines. And a foaming foam mixing head device having a cleaning function including a cleaning unit for supplying air to the space, respectively.

In this case, the operation unit advances the operation rod to the head cover side so that the first and second connection lines branched from the mixed discharge line of the operation rod and the first air branch line correspond to each other. It is possible to discharge and remove the mixed material of the main material and the hardener remaining in the mixed discharge line by the air forcedly supplied to the mixed discharge line of the operation rod operated forward through the one air branch line.

At this time, the operation unit is to return the operation rod forward operation so that the first and second connection lines branched from the mixed discharge line of the operation rod and the first and second exposure holes of the main and the hardener supply unit correspond to each other, The cleaning unit foams and sprays the mixed material in which the main material and the hardener are mixed to the outside through the mixed discharge line of the backward-returned working rod, and simultaneously fills the air filled in the head space through the second air branch line with the working rod and the center. It can inject through the passage formed between lessons.

In this case, the operation rod may include a stepped portion having an outer diameter of a size smaller than the inner diameter of the central hole to form an injection passage through which the air filled in the head space is injected.

In this case, the annular ring is connected to the inner surface of the guide hole through which the end portion of the first air branch line is exposed so as to communicate with the first and second connection lines simultaneously with the first and second connection lines branching from the mixed discharge line. It may include mold grooves.

In this case, the inner side of the head cover and the head cover corresponding to the head cover may include a depression recessed to a certain depth to form a head space filled with the air supplied through the second air branch line.

According to the preferred embodiment of the present invention as described above has the following effects.

The main and hardener raw materials are mixed in the mixing discharge line of the working rod and foamed to the mold side, and then the mixed raw material remaining inside the mixing discharge line is cleanly discharged and cleaned by the air forcedly supplied into the mixing discharge line. By repeatedly performing the process in conjunction with the forward and backward operation of the working rod, the mixed raw material remaining on the working rod is moved to another adjacent area by its own weight during the position shift to perform the foaming process to another adjacent mold after the foaming process. It can be prevented from dropping and polluting the equipment.

In addition, the main body and the hardener raw material are mixed in the mixing discharge line of the working rod and foamed to the mold side, and at the same time, the air is sprayed through the passage formed between the outer surface of the working rod and the central hole of the head cover to spray the mold to the mold side. It is possible to increase the concentration efficiency of the mixed raw materials to be obtained an effect that can increase the work productivity.

1 is an overall perspective view of a foam foam mixing head device having a cleaning function according to an embodiment of the present invention.
2 is a cross-sectional perspective view showing a foam foam mixing head device having a cleaning function according to an embodiment of the present invention.
Figure 3 is an exploded perspective view showing a foam foam mixing head device having a cleaning function according to an embodiment of the present invention.
Figure 4 is a schematic diagram showing the main body and the hardener supply and return line provided in the foam foam mixing head device having a cleaning function according to an embodiment of the present invention.
Figure 5 is a cross-sectional perspective view showing an operating state of the foam foam mixing head device having a cleaning function according to an embodiment of the present invention,
(a) is the cleaning state in the forward operation of the working rod,
(b) is the foam injection state in the reverse return operation of the working rod.
Figure 6 is a cross-sectional view showing an operating state of the foam foam mixing head device having a cleaning function according to an embodiment of the present invention,
(a) is the circulation standby state of the main material and the hardener when the air supply is stopped in the forward standby state of the working rod,
(b) is the mixed raw material foaming and air spraying state in the reverse operation of the working rod.
(c) is the air cleaning state in the forward operation of the working rod.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in describing in detail the structural principle of the preferred embodiment of the present invention, when it is determined that the detailed description of the related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

In addition, the same reference numerals are used for parts having similar functions and functions throughout the drawings.

In addition, throughout the specification, when a part is 'connected' to another part, it is not only 'directly connected' but also 'indirectly connected' with another element in between. Include. In addition, the term 'comprising' a certain component means that the component may be further included, without excluding the other component unless specifically stated otherwise.

Foam foam mixing head device 100 having a cleaning function according to an embodiment of the present invention, as shown in Figures 1 to 3, the main body 110, the main supply unit 120a, the curing agent supply unit 120b, the operation Including the unit 140 and the cleaning unit 150 to selectively supply the cleaning air to the mixed discharge line is discharged by mixing the main material and the curing agent according to the forward and backward operating state of the operating rod to supply the mixed residue of the main material and the curing agent It is cleaned by removing it to the outside.

1, 2 and 3, the main body 110 includes an operation rod, a head body and a head cover, the operation rod 111 is a mixture that is discharged by mixing the main and the hardener The discharge line 112 may be formed in the body, and may include a bar member having a predetermined length so as to be reciprocated to the head body.

One end of the mixing discharge line 112 corresponding to the end of the operation rod 111 is opened, and the first and second connection lines 112a and 112b are formed to be in communication with the main supply part and the hardener supply part at the other end of the sealing rod. ).

Here, the mixing discharge line 112 and the first and second connection lines 112a and 112b formed on the working rod are provided in a substantially T-shape, and the first and second connection lines correspond to the main body and the hardener supply unit. Branches in opposite directions from the closed end of the mixed discharge line 112.

The first and second connection lines 112a and 112b are selectively connected to the main and hardener supply units 120a and 120b according to the forward and backward positions of the operation rod 111 to supply the main and hardeners or the cleaning unit. It is selectively connected to the first air branch line 151 of 150 to supply air.

Accordingly, the main body and the hardener supplied through the first and second connection lines during the backward return of the working rod are mixed in the mixing discharge line formed in the working rod, and then sprayed into a mold (not shown) to be foamed in the mold. Will be.

On the other hand, when the working rod is advanced, the mixture of the main agent and the hardener remaining in the mixed discharge line formed in the working rod is forced out by the air supplied through the first and second connection lines.

The head body 113 is coupled to the cylinder body 142 of the operating unit 140 by forming a through hole 114 in the center of the body, the operation rod 111 is reciprocally assembled, the subject , And are combined with the curing agent supply unit (120a, 120b), respectively.

The head cover 115 has a plurality of fastenings on one side of the head body 113 by forming a body forming a central hole (115a) is inserted into a portion of the front end of the operation rod 111 assembled in the guide hole of the head body It is detachably assembled by a member.

In this case, a head space is formed between the inner surface of the head cover 115 and the head body 113 by a predetermined size interval, and the second air branch line of the cleaning part 150 is formed in the head space. 152 is in communication with the air is filled.

In addition, the operation rod 111 preferably includes a stepped portion 111a having an outer diameter of a size smaller than the inner diameter of the central hole 115a to form an injection passage through which air filled in the head space is injected. .

Accordingly, as shown in Figures 5a and 5b, when the stepped portion is located so as to correspond to the central hole during the backward return of the operating rod by the annular injection passage formed between the stepped portion and the central hole The air filled in the head space can be injected in the same direction as the direction in which the mixed material mixed with the main material and the curing agent is foamed sprayed.

As the stepped portion is fully exposed to the front side of the head cover when the working rod is advanced, the inner surface of the central hole is in contact with the outer surface of the working rod to block external injection and discharge of air filled in the head space.

The main supply unit 120a and the curing agent supply unit 120b are made of the mixed discharge line 112 formed on the operation rod which is operated forward and backward in the guide hole of the head body as shown in FIGS. 1, 2 and 3. Removably assembled to the head body 113 to supply the main body and the hardener through the first and second nozzle holes (121a, 121b) selectively communicated with the first and second connection lines (112a, 112b), respectively. .

The main supply unit 120a and the hardener supply unit 120b supply main and hardeners, which are different raw materials, through the first and second connection lines 112a and 112b of the mixed discharge line 112 of the working rod, respectively. Since they have the same configuration, the same configuration will be described with the same reference numerals.

That is, the main supply unit 120a and the curing agent supply unit 120b are positioned at the tip of the nozzle cone 122 disposed to correspond to the first and second nozzle holes 121a and 121b, respectively, so that the first and second nozzle holes are located. It includes a nozzle needle 123 of a predetermined length that is assembled to enable the forward and backward reciprocating movement in the nozzle holder 125 to adjust the opening size of (121a, 121b).

The front end of the nozzle needle by moving the nozzle needle 123 by rotating the nozzle needle 123, which is formed in the middle of the length of the nozzle holder 125 and the male threaded portion screwed in the nozzle holder 125 in the forward and reverse directions, to move the nozzle needle 123 And a adjusting knob 126 for controlling the discharge supply amount of the main agent or the hardener supplied through the first and second nozzle holes by adjusting the interval between the nozzle cone and the nozzle cone.

A portion of the body of the nozzle holder 125 is formed in a predetermined depth in the head body 113 so as to penetrate the first and second nozzle holes (121a, 121b) on the bottom surface corresponding to the guide hole 114, respectively. Correspondingly inserted into the mounting hole 127, the rest of the body of the nozzle holder 125 is fixed by the block body 128 detachably assembled to the head body.

A raw material supply port is formed on the outer surface of each nozzle holder of the main supplying unit 120a and the curing agent supplying unit 120b so that the main supply and the curing agent supplied through the main supplying line and the curing agent supplying line are formed on the cylinder body of the operating unit. 129), respectively.

Here, the head main body is shown and described as a set of a pair consisting of the main supply unit 120a and the hardener supply unit 120b in pairs, but different depending on the material or type of the molded article for foam molding in the mold not shown Another supply section for additionally supplying the raw material of the component may be additionally provided.

1, 2 and 3, the operation unit 140, the hollow cylinder-shaped cylinder body 142 is coupled to the head body 113 of the main body portion, and the open of the cylinder body It includes a cylinder cover 143 to seal to one side, by accommodating the piston 141 integrally provided at the end of the operating rod in the cylinder body coupled to the head body, the reference to the piston 141 Since the piston can be reciprocated forward and backward in the horizontal direction in the drawing by the hydraulic oil supplied to the front side or the rear side, the operating rod 111 assembled in the guide hole 114 of the head body is used as It can be reciprocated in conjunction with the piston to perform the foam spraying process and the cleaning air spraying process.

The piston 141 may include a guide bar 141a which is inserted into and guided by an insertion guide hole which is formed in a predetermined depth in the other side of the head body during the forward operation together with the operation rod.

The cylinder body 142 has a main and a hardener supplying the main and the hardener to the main supply portion and the hardener supplying side and the main and hardener returning the main and the hardener to the outside when waiting for air cleaning Lines 144b and 145b may be provided.

The cylinder cover 143, which is assembled and sealed with the open end of the cylinder body 142, seals the main line and the external line (not shown) for supplying and returning the hardener so that the supply and return process of the main and hardeners can be performed smoothly. And a return external line (not shown), respectively.

In addition, the cylinder body 142 forms a connection hole 148 connected to a hydraulic line for supplying hydraulic oil between the head body and the piston for the reverse return of the operation rod which has been operated forward, and the cylinder cover 143 There is formed a plurality of connection holes connected to the hydraulic line for supplying the hydraulic fluid internally and the external discharge for forward and backward operation of the operating rod.

As shown in FIGS. 1, 2, and 3, the cleaning unit 150 is formed in the head main body 113 so as to communicate with an external air supply line, and supplies air, which is compressed air, to the air main line 153. And a branch extending from the air main line 153 to the guide hole 114 to selectively communicate with the mixing discharge line 112 formed on the operation rod 111. The air main line 153 forms a first air branch line 151 at which an end is exposed, and selectively communicates with a head space formed by a gap between the head cover 115 and the head body 113. It may include a second air branch line 152 branched from the head cover 115 to extend from one end of the head body to which the head cover is assembled.

The inner surface of the guide hole through which the end portion of the first air branch line 151 is exposed communicates with the first and second connection lines simultaneously with the first and second connection lines 112a and 112b formed on the operating rod. It is preferable to have a ring-shaped groove that is connected to be recessed so as to simultaneously supply air to the mixed discharge line of the working rod.

In addition, the inner surface of the head cover 115 corresponding to the head body 113 is recessed to a predetermined depth so as to form a head space filled with air supplied through the second air branch line 152. Is preferably provided.

One side surface of the head cover 115 and the corresponding head body 113 includes a protruding extension tube 155 extending a predetermined length from the guide hole 114 to form a gap between the head cover 115 and the inner surface of the head cover. can do.

Accordingly, as shown in FIGS. 5A and 5B, when the stepped portion formed at the tip of the actuating rod and the center hole of the head cover correspond to each other when the actuating rod returns backward, it is supplied through the second air branch line. The air filled in the head space is injected through the passage formed at the interval between the stepped portion and the central construction, and the main and the hardeners supplied through the first and second connection lines are mixed in the mixed discharge line formed in the working rod. After mixing with the raw material, it is sprayed into a mold (not shown) to be foamed in the mold.

On the other hand, when the working rod is advanced, the working rod is disposed in contact with the central hole of the head cover to block the gap formed between the stepped portion and the central construction, and at the same time, the first and second connection lines and the first and second exposures. As the balls are alternately arranged, the first and second connection lines are sealed by the inner surface of the guide hole, and the first and second exposure holes are sealed by the outer surface of the working rod, so that the injection supply of the main material and the hardener is suspended. Will be.

Meanwhile, the main body and the hardener supply lines 144a and 145a formed in the cylinder body 142 to supply the main body and the hardener to the main body supplying part and the hardener supplying part are formed in the head body as shown in FIG. 4. And a raw material supply port 129 formed in the nozzle holder 125 provided in the main and the curing agent supply units 120a and 120b through the curing agent auxiliary horizontal lines 116a and 116b, respectively. On the outer surface of the working rod adjacent to the connection line 2, the outer surface of the operating rod adjacent to the first and second nozzle holes may be selectively formed to form a return flow path for returning the main body and the hardener to the outside between the inner surface of the guide hole of the head body. The first and second long grooves 117a and 117b are formed to have a depth depression.

In addition, the main body and the hardener return line (144b, 145b) formed in the cylinder body to return the main body and the hardener to the outside, as shown in Figure 4, is formed in the head body and the first, second grooves 117a , 117b) and the bottom is in communication with the top and the top of the hardener vertical horizontal line (118a, 118b).

On the other hand, the step of spraying the mixed raw material mixed with the main material supplied from the main supply unit and the hardener supplied from the hardener supply unit from the mixing discharge line of the operating rod to the mold side to foam molding in the mold, and after the foaming powder of the mixed raw material The step of cleaning the residue of the mixed raw material remaining in the mixed discharge line in the selectively performed by the air which is compressed air supplied to the air main line of the cleaning unit with the reciprocating operation of the operating rod.

That is, as shown in Figure 6a, when the operation rod is a predetermined length forward operation to the left in the drawing, the first and second connection lines branched from both sides of the mixed discharge line in communication with the first air branch line of the cleaning unit Simultaneously connected, the first and second nozzle holes of the main body and the hardener supply unit correspond to one end of the first and second long grooves formed in the outer surface of the working rod.

In this state, when the solenoid opening and closing valve of the air external supply line connected to the air main line of the cleaning unit is closed, the supply of compressed air is stopped and the air is forced into the mixed discharge line. While the cleaning process is not performed, the main and hardeners supplied through the first and second nozzle holes of the main and hardener supply units, respectively, have the first and second long grooves, the first and second long grooves and the lower end formed in the working rod. It is circulated by returning to the outside through the subject and the hardener return line connected in communication through the vertical and the hardener vertical horizontal line.

Subsequently, as shown in FIG. 6B, when the operation rod is reversely operated to the right in the drawing, the first and second connection lines branched from both sides of the mixed discharge line are connected to the first and second nozzle holes of the main and the curing supply parts. Correspondingly connected and at the same time the stepped portion of the actuating rod is located in the center hole of the head cover to form a spray passage between the center hole and the actuating rod, while the first air branch line of the cleaning part is blocked by the outer surface of the actuating rod. .

In this case, the main and hardeners respectively supplied to the mixed discharge line through the first and second connection lines communicating with the first and second nozzle holes of the main and hardener supply units are mixed and the mixed raw materials are foamed to the mold side.

At the same time, when the solenoid opening and closing valve of the air external supply line connected to the air main line of the cleaning unit is opened, the head cover and the head body are connected to each other through a second air branch line branched from the air main line. The air filled in the head space to be formed is injected through a passage formed between the central hole of the head cover and the stepped portion of the working rod.

Subsequently, after the spraying of the mixed raw material through the mixed discharge line of the reverse return operation rod is performed for a predetermined time, as shown in Figure 6c, when the operation rod is moved forward again, The first and second connection lines branched from the mixed discharge line are in communication with the first air branch line of the cleaning part, and the first and second nozzle holes of the main and hardener supply parts are recessed on the outer surface of the working rod. Corresponds to one or two ends of the groove.

In this case, the mixed raw material remaining in the mixed discharge line of the working rod is forced into the mixed discharge line through the first and second connection lines connected to the first air branch line in which the air supply is made and discharged to the outside. It is cleaned by air and air-cleaned.

Accordingly, it is possible to prevent the mixed raw material remaining in the mixed discharge line from dropping by its own weight to contaminate adjacent peripheral equipment or to contaminate the mixing head device.

The foam injection and air cleaning process of the mixed raw material may be repeatedly performed every time the forward and backward reciprocating operation of the operating rod while repeatedly spraying the mixed raw material into the mold to produce a molding.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

110: main body
111: working rod
111a: stepped portion
112: mixed discharge line
113: head body
114: the guide
115: head cover
115a: Central hole
120a, 120b: Main and hardener supply part
121a, 121b: 1st, 2nd nozzle ball
122: nozzle
123 nozzle nozzle
125: nozzle holder
140: operating part
141: piston
142: cylinder body
143: cylinder cover
144a, 145a: Main and hardener supply line
144b, 145b: Main and hardener return line
150: cleaning unit
151: first air branch line
152: second air branch line
153: Air main line

Claims (6)

A working rod having a mixing discharge line for discharging the main body and the curing agent by mixing with each other, and having a head body in which the working rod is reciprocally assembled in the guide hole, and forming a central hole in which the working rod is disposed. Body portion including a head cover assembled to the head body;
A main body supply unit which is provided in the head body to selectively communicate with the mixed discharge line;
A hardener supply unit provided in the head body to selectively communicate with the mixed discharge line to supply a hardener;
An operation unit configured to reciprocate the operation rod forward and backward by accommodating a piston provided at an end of the operation rod in a space of the cylinder body coupled to the head body; And
An air main line formed in the head main body to supply air, a first air branch line branched from the air main line to the guide hole, and selectively communicating with the mixed discharge line, from the air main line The second air branch line is branched to the head cover side and selectively communicated with the head space formed between the head cover and the head body, and the mixed discharge line and the head space through the first and second air branch lines. Foaming mixing head device having a cleaning function comprising a; cleaning unit for supplying air to each other. The method of claim 1,
The operation unit advances the operation rod to the head cover side so that the first and second connection lines branched from the mixed discharge line of the operation rod and the first air branch line communicate with each other.
The annoying cleaning unit discharges and removes the mixed material of the main material and the hardener remaining in the mixed discharge line to the outside by the air forcedly supplied to the mixed discharge line of the operation rod operated forward through the first air branch line. Foam foam mixing head device having a cleaning function. The method of claim 1,
The actuating unit retracts the actuating rod that has been operated forward so that the first and the second connection lines branched from the mixing discharge line of the actuating rod and the first and the second exposure holes of the main body and the hardener supply unit correspond to each other.
The cleaning unit foams and sprays the mixed material in which the main material and the hardener are mixed to the outside through the mixed discharge line of the backward-returned working rod, and simultaneously fills the air filled in the head space through the second air branch line with the working rod and the center. Foam foam mixing head device having a cleaning function, characterized in that the injection through the passage formed between the ball. The method according to any one of claims 1 to 3,
The operation rod is a foam foam mixing head device having a cleaning function, characterized in that it comprises a step portion having an outer diameter of a size smaller than the inner diameter of the central hole to form an injection passage in which the air filled in the head space is injected. The method according to any one of claims 1 to 3,
An annular groove is connected to an inner surface of the guide hole through which the end of the first air branch line is exposed so as to communicate with the first and second connection lines simultaneously with the first and second connection lines branching from the mixed discharge line. Foam foam mixing head device having a cleaning function comprising a. The method according to any one of claims 1 to 3,
Foaming mixing having a cleaning function, characterized in that the inner surface of the head cover and the corresponding head cover includes a depression recessed to a predetermined depth to form a head space filled with the air supplied through the second air branch line Head device.

Images