KR101676486B1 - Foam Mixing Head having a Calibration - Google Patents

Abstract

Provided is a foam mixing head having a calibration function. The foam mixing head having a calibration function comprises: a head body forming a mixing chamber in which a main material and a curing agent are mixed; a main material supply unit provided in the head body; and a curing agent supply unit provided in the head body. The main material supply unit and the curing agent supply unit include first and second nozzle needles whose front ends are disposed at first and second nozzle openings; first and second nozzle holders which are assembled so that the first and second nozzle needles can perform a reciprocating motion; first and second screw holders which are assembled so that first and second adjustment screws in contact with rear ends of the first and second nozzle needles can perform a rotating motion; and first and second hydraulic fluid supply units selectively supplying a fluid to first and second cavities formed between the first and second screw holders and the rear ends of the first and second nozzle needles, to close either the first or second nozzle opening. While one of the first and second nozzle openings is closed, a discharge amount of the main material or a discharge amount of the curing agent, being discharged through the other opening, is measured to be set.

Description

[0001] The present invention relates to a foam mixing head having a calibration function,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foam foam mixing head having a calibration function, and more particularly, to a foam foam mixing head having a calibration function capable of performing a verification operation on a subject discharge amount and a verification operation on a hardener discharge amount,

Generally, a method of producing a foamed polyurethane foam product is roughly divided into a low-pressure foaming method and a high-pressure foaming method. In the high-pressure foaming method, raw materials composed of a subject and a hardening agent are injected at high pressure through a nozzle, mixed by impact force, And injected into a mold to perform foaming molding in the mold.

The composition of the blowing machine to which this high pressure foaming method is applied is composed of a raw material tank (Tank), a pump (Pump), a mixing head, a driving hydraulic device and an electric and electronic control device. Particularly, It is the core product that determines the quality of foamed products.

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

Three methods are known as foaming method by mixing two or more undiluted solutions.

The first method is a mixing method using a static mixer using a flow in a pipe, and the second method is a method using a dynamic mixer. By mixing a mechanical mixer by rotating a blade, (HIGH SPEED OF THE STREAMS AND JETS), which is a method of mixing using high pressure collision of fluid.

In the process of forming the double-foamed urethane, the high-pressure injection is used to mix the base and the curing agent because the isocyanate as a raw material reacts with the polyol but reacts with water and also reacts with itself, It is necessary to increase the mixing efficiency to obtain the foaming foam having the desired performance.

The amount of the blowing agent discharged through the nozzles of the mixing head and the time during which the curing agent is discharged in a solution state is determined in advance according to the foaming foam manufacturing conditions to be manufactured. And can be achieved by a rotary operation of an advanced screw that varies the position of the needle.

In order to verify the discharge amount of the conventional subject solution, the nozzle needle is moved by the rotation operation of the advance screw in a state in which the second nozzle hole serving as the other nozzle for discharging the hardener solution is blocked, The discharge amount was adjusted by varying the opening size, the adjusted discharge amount was confirmed, and then the rotation of the adjusted advanced screw was set and fixed.

However, in order to verify the discharge amount of the curing agent, it is necessary to shut off the first nozzle hole from which the main discharge is made. In order to verify the discharge amount of the hardening agent, It is difficult to fundamentally accurately perform the verification of the amount of the main discharge through the first and second nozzle holes of the mixing head and the discharge amount of the hardening agent.

In addition, when the mixing ratio of the base and the curing agent is changed due to the change of the product and the type of the foamed foam, if the verification of the discharge amount of the base and the curing agent discharged through the first and second nozzle holes of the mixing head can not be accurately performed, Resulting in a decrease in product yield.

(Patent Document 1) KR10-0368178 B1

(Patent Document 2) KR10-0475250 B1

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an ink jet recording head capable of selectively blocking nozzle holes through which a nozzle is ejected and nozzles from which a curing agent is ejected, And to provide a foamed foam mixing head having a calibration function capable of performing a verification operation and a verification operation of a hardening agent discharge amount in a simple and accurate manner.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

In order to accomplish the above object, a preferred embodiment of the present invention is a dispensing head comprising a head body having a mixing chamber in which a mixture of a subject and a curing agent is formed, and a discharge pipe through which a mixture of the mixture of the mixture and the curing agent is discharged, And a second nozzle hole communicating with the mixing chamber, the second nozzle hole communicating with the mixing chamber, and a second nozzle hole communicating with the mixing chamber, the second nozzle hole communicating with the mixing chamber, And the first and second nozzle needles having tip ends positioned in the first and second nozzle holes, wherein the first and second nozzle holes are provided in the first and second mounting holes of the head body, The first and second nozzle needles are assembled such that the first and second nozzle needles are reciprocally assembled so that the first and second adjusting screws, which are in contact with the rear end of the first and second nozzle needles, Wherein the first and second screw holders are provided with a first and a second nozzle, respectively, and selectively supplying a fluid to the first and second cavities formed between a rear end of the first and second nozzle needles and the first and second screw holders, And a second and a third hydraulic oil supply units for shutting off any one of the first and second nozzle openings. The first and second nozzle openings cut off any one of the first and second nozzle openings are used to measure a target discharge amount or a curing agent discharge amount, The present invention provides a foamed foam mixing head having a calibration function.

The first and second hydraulic oil supply units may include first and second hydraulic oil lines formed in the first and second screw holders such that one end of the first and second hydraulic oil supply units is connected to the first and second cavities to supply and return the hydraulic oil.

Preferably, the main supplying part and the hardening agent supplying part are screwed to the first and second adjusting screws so as to prevent rotation of the first and second adjusting screws, 1,2 < / RTI >

Preferably, the mixing cylinder includes a mixing cylinder which reciprocates along a connection passage formed in the head body to communicate with the mixing chamber to open or shut off the first and second nozzle holes, and the mixing cylinder is assembled to the head body A first piston reciprocating in the first cylinder housing and a first piston shaft extending from the first piston to the mixing chamber by a predetermined length and assembled to be reciprocatable in the connection passage.

Preferably, a plurality of nozzles may be provided on the outer surface of the first piston shaft so that a subject and a curing agent respectively discharged through the first and second nozzle holes may be bypass circulated through the main return channel and the hardener return flow path formed in the head body. And the first and second bypass grooves may be formed to be recessed.

Preferably, the cleaning cylinder includes a cleaning cylinder whose front end is reciprocally operated from the mixing chamber to the discharge pipe so as to clean the mixture remaining in the mixing chamber. The cleaning cylinder is reciprocally operated in the second cylinder housing assembled to the head body And a second piston shaft having a distal end extending a predetermined length from the second piston to the discharge pipe through the mixing chamber.

The present invention as described above has the following effects.

(1) By selectively supplying a working oil to a cavity formed between a nozzle needle and a screw holder, which are linearly moved, a nozzle hole through which the motive agent is discharged and a nozzle hole through which the hardening agent is discharged can be selectively used It is possible to verify and set the target discharge amount and verify and set the discharge amount of the hardener easily and accurately, thereby improving the quality and reliability of the foamed product.

(2) Verification and setting of the target discharge amount and verification and setting of the discharge amount of the hardener can be performed in a short period of time in sequence, thereby minimizing the interruption of the process line during the setting operation, thereby increasing work productivity.

1 is an overall perspective view illustrating a foam foam mixing head having a calibration function according to a preferred embodiment of the present invention.
FIG. 2 is an enlarged view of a main part of a foam foam mixing head having a calibration function according to a preferred embodiment of the present invention.
3 is a cross-sectional view of a foamed foam mixing head having a calibration function according to a preferred embodiment of the present invention.
4 is a cross-sectional view illustrating a cleaning cylinder applied to a foam foam mixing head having a calibration function according to a preferred embodiment of the present invention.
FIGS. 5A to 5C are views illustrating a process of mixing and dispensing a base and a curing agent in a foamed foam mixing head having a calibration function according to a preferred embodiment of the present invention.
6A to 6C are process diagrams illustrating an operating state of a cleaning cylinder in a foam foam mixing head having a calibration function according to a preferred embodiment of the present invention.
FIGS. 7A and 7B are process diagrams for verifying the target discharge amount and the curing agent discharge amount in the foam foam mixing head having the calibration function according to the preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may obscure the subject matter of the present invention.

The same reference numerals are used for portions having similar functions and functions throughout the drawings.

In addition, in the entire specification, when a part is referred to as being 'connected' to another part, it may be referred to as 'indirectly connected' not only with 'directly connected' . Also, to include an element does not exclude other elements unless specifically stated otherwise, but may also include other elements.

1 to 4, a foamed foam mixing head 100 having a calibration function according to a preferred embodiment of the present invention includes a head body 110, a main feeder 120, a curing agent feeder 130, The first nozzle hole through which the liquid phase is discharged and the second nozzle hole through which the liquid curing agent is discharged are selectively blocked with the cylinder 140, the cleaning cylinder 150, and the first and second hydraulic oil supply portions 160a and 160b The subject and the curing agent are sequentially discharged, and the subject discharge amount and the curing agent discharge amount can be easily and accurately measured and set to a preset value.

The head main body 110 is formed to penetrate the mixing chamber 112 so as to form an internal space of a predetermined size in which the main body A and the curing agent B are mixed at the center of the main body 110, A mixer in which the main body and the hardener are mixed in the mixing chamber is provided to the mold not shown and discharged to the outside through the discharge pipe.

The main body supplying unit 120 is provided in the head main body 110 to supply the main body A through a first nozzle hole 121 communicating with the mixing chamber 112.

The main nozzle unit 120 includes a first nozzle holder 122 disposed at the first nozzle hole 122 disposed at the first nozzle hole 121 and having a first nozzle hole 125 for adjusting the opening size of the first nozzle hole 121, And a first nozzle needle 123 having a predetermined length capable of reciprocatingly reciprocating in the forward and backward direction.

The first nozzle holder 125 may be a hollow cylindrical body that is detachably assembled to the first mounting hole 129 formed in the head body to communicate with the mixing chamber while forming the first nozzle hole.

The head main body 110 is provided with a screw hole in which the first adjusting screw 124, which is in contact with the rear end of the first nozzle needle 123, is screwed into the first nozzle holder 125, And a first screw holder 127 formed at the center of the body.

The first screw holder 127 is fixed to the outer surface of the head body with a coupling hole to be fitted to the rear end of the first nozzle holder 125 protruding from the outer surface of the head body.

The curing agent supplying unit 130 is provided in the head body 110 to supply a liquid curing agent B through a second nozzle hole 131 communicating with the mixing chamber 112 as in the case of the main supplying unit.

The curing agent supply unit 130 includes a second nozzle holder 135 for adjusting the size of the opening of the second nozzle hole 131 by positioning the tip of the second nozzle hole 132 disposed in the second nozzle hole 131, And a second nozzle needle 133 having a predetermined length capable of reciprocating back and forth within the nozzle needle 133.

The second nozzle holder 135 may be a hollow cylinder that is detachably assembled to the second mounting hole 139 formed in the head body to communicate with the mixing chamber while forming the second nozzle hole.

The second adjusting screw 134, which is in contact with the rear end of the second nozzle needle 133 assembled to reciprocate within the second nozzle holder 135, is screwed into the head body 110, And a second screw holder 137 formed at the center of the body.

The first and second screw holders 127 and 137 are provided with an engaging hole for engaging with a rear end of the first and second nozzle holders 125 and 135 projecting from the outer surface of the head body, .

The first and second spaces S1 and S2 formed between the outer surfaces of the first and second nozzle needles 123 and 133 and the inner surfaces of the first and second nozzle holders 125 and 135 are connected to the main supply passage 113, And the curing agent supply flow path 115 to supply and fill the liquid base and the curing agent, respectively, and the subject and the curing agent, which are respectively filled in the first and second spaces, And simultaneously injected into the mixing chamber 112 at the time of opening.

It is preferable that the body of the first and second nozzle needles 123 and 133 and the first and second adjusting screws 124 and 134 are provided with o-ring members so that liquid matters and a curing agent do not flow out to the outside.

As a result, the discharge amount of the target and the curing agent, which are respectively discharged through the first and second nozzle holes, are rotationally moved by the forward rotation operation of the first and second control screws to advance the first and second nozzle needles toward the mixing chamber The gap between the tips of the first and second nozzle needles and the first and second nozzle cones disposed in the first and second nozzle holes is narrowed so that the size of the discharge hole through the first and second nozzle holes can be reduced It is possible to control the discharge amount of the base and the hardener.

On the other hand, the first and second adjusting screws are rotated by the reverse rotation of the first and second adjusting screws, so that the tips of the first and second adjusting screws are separated from the rear ends of the first and second nozzle needles. When the nozzle and the curing agent are introduced, the first and second nozzle needles are moved backward by the supply pressure of the nozzle and the curing agent, and are disposed at the tip of the first and second nozzle needles and the first and second nozzle holes The gap between the first and second nozzle cones can be enlarged to increase the size of the discharge hole through the first and second nozzle holes, so that the discharge amount of the nozzle and the hardener can be adjusted.

The mixing cylinder 140 opens and closes the first and second nozzle holes 121 and 131 while being reciprocally operated along a connection passage 141 formed in the head body 110 to communicate with the mixing chamber 112 .

The mixing cylinder 140 includes a first piston 143 assembled to the head body 110 and reciprocally operated in a first cylinder housing 142 through which a working fluid such as operating fluid is supplied and discharged, And a first piston shaft 144 having a distal end extended from the first piston 143 to the mixing chamber 112 by a predetermined length so as to be reciprocally assembled to the connection passage 141.

A plurality of nozzles (121, 131) and a plurality of nozzles (121, 131) are provided on the outer surface of the front end of the first piston rod reciprocally operated with the first piston by the supply of the operating oil supplied to the first cylinder housing, The first and second bypass grooves 144a and 144b are recessed so as to bypass the main return path 117 and the hardener return flow path 119 formed in the main body.

5A to 5C, when the first piston rod is retracted by the upward movement of the mixing cylinder, the liquid phase and the curing agent are simultaneously supplied to the mixing chamber The first and second nozzle holes 121 and 131 are communicated with each other through the first and second bypass grooves through the main return passage 117 and the hardener return flow path 119, respectively, so as to circulate the liquid base A and the curing agent B.

The cleaning cylinder 150 is operated to reciprocate the tip of the cleaning cylinder 150 from the mixing chamber 112 to the discharge pipe 114 so as to discharge the mixture remaining in the mixing chamber 112 to the outside.

The cleaning cylinder 150 has a second piston 153 assembled to the head body 110 and reciprocally operated in a second cylinder housing 152 to which a working fluid such as operating fluid is supplied and discharged. And a second piston shaft 154 having a predetermined length extending from the first piston 153 to the discharge pipe 114 through the mixing chamber 112.

6A to 6C, a mixture of a mixture of a mixture of a mixture of a mixture of a mixture of a mixture of a mixture of a mixture of a mixture of a mixture of a mixture of a mixture of the mixture And the remaining mixture is removed by the second piston shaft whose tip is lowered to the mixing chamber and the discharge pipe by the lowering operation of the cleaning cylinder.

The first and second hydraulic oil supply units 160a and 160b may include first and second cavities 162a and 162b formed between the rear ends of the first and second nozzle needles 123 and 133 and the first and second screw holders 127 and 137, 162b to selectively supply hydraulic fluid to the first and second cavities 162a, 162b through the first and second hydraulic fluid lines, respectively, by selectively providing first and second hydraulic fluid lines 164a, So that any one of the first and second nozzle holes 121 and 131 is blocked.

In the state where any one of the first and second nozzle holes 121 and 131 is blocked, the discharge amount of the subject discharged through the remaining nozzle holes or the discharging amount of the curing agent is adjusted to a predetermined value, The first nozzle needle is advanced by one of the first and second nozzle needles.

That is, as shown in FIG. 7A, when hydraulic oil is supplied through the second hydraulic oil line of the second hydraulic oil supply unit 160b and is filled in the second cavity 162b, The tip end of the second nozzle needle moved forward can close the second nozzle hole so as to close the second nozzle hole, so that the second nozzle hole, in which the hardener is discharged, The amount of the discharged subject matter through the nozzle hole can be controlled and verified by the rotating operation of the first adjusting screw.

At this time, the first adjusting screw 124, which is rotated by a predetermined amount to adjust the amount of the main discharge through the first nozzle hole 121, is screwed to the first adjusting screw 124 so that further turning operation is difficult, 1 by a first fixing ring 126 that contacts the screw holder and generates a fixing force.

As shown in FIG. 7B, when the subject discharge amount in the main supply unit is adjusted to a predetermined setting value, the operating oil is supplied through the first operating oil line of the first operating oil supply unit 160a, The first nozzle needle is moved forward without the need to rotate the first adjustment screw by the pressure of the hydraulic fluid filled in the cavity 162a so that the tip of the forwardly moved first nozzle needle is in contact with the first nozzle cone, You can close the ball.

The amount of the hardening agent discharged through the second nozzle hole of the hardening agent supply unit in a state in which the first nozzle hole to which the motif is discharged is adjusted and verified by the rotating operation of the second adjusting screw.

At this time, the second nozzle needle 133, which is advanced to block the second nozzle hole 131, is supplied to the second space S2 for setting the subject discharge amount in the first hydraulic oil supply unit 160a And the hydraulic oil filled in the second cavity is returned through the second hydraulic oil line by the second nozzle needle which is returned backward.

In addition, the second adjusting screw 134, which has been rotated for a predetermined amount to adjust the amount of the hardening agent discharged through the second nozzle hole 131, is screwed to the second adjusting screw 134 so that further turning operation is difficult And can be set and fixed by a second fixing ring 136 that contacts the second screw holder and generates a fixing force.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be apparent to those of ordinary skill in the art.

110: Head body
112: mixing chamber
114: Discharge pipe
113,115: Topic, hardener supply flow rate
117,119: Topic, hardener return flow
120, 130: Topic, Curing agent supplier
121, 131: 1st and 2nd nozzle balls
122, 132: first and second nozzle cones
123, 133: first and second nozzle needles
124, 134: first and second adjusting screws
125, 135: first and second nozzle holders
126, 136:
127, 137: first and second screw holders
140: mixing cylinder
141: connecting passage
142: first cylinder housing
143: first piston
144: a first piston shaft
144a and 144b: first and second bypass grooves
150: Cleaning cylinder
152: second cylinder housing
153: second piston
154: second piston shaft
160a, 160b: first and second hydraulic oil supply portions
162a, 162b: first and second cavities
164a, 164b: first and second hydraulic oil lines

Claims (6)

A head body having a discharge chamber in which a mixing chamber for mixing a main body and a curing agent is formed and a mixture in which the main body and the curing agent are mixed is discharged,
A main supply part provided on the head body to discharge the main body through a first nozzle hole communicating with the mixing chamber,
And a curing agent supply unit provided in the head body to discharge the curing agent through a second nozzle hole communicating with the mixing chamber,
Wherein the main supply part and the curing agent supply part include first and second nozzle needles whose tips are located at the first and second nozzle holes, respectively, and the first and second nozzle needles provided in the first and second mounting holes of the head main body, And first and second screw holders including first and second nozzle holders movably assembled to allow the first and second adjusting screws to contact with the rear end of the first and second nozzle needles to be rotatable In addition,
The first and second nozzle holders are provided with first and second cavities, respectively. The first and second cavities are disposed between the rear end of the first and second nozzle needles and the first and second cavities. And a hydraulic oil supply portion,
Wherein a set amount of the target discharge amount or a discharge amount of the hardening agent discharged through the remaining nozzle holes in a state where any one of the first and second nozzle holes is blocked is set and set. The method according to claim 1,
Wherein the first and second hydraulic oil supply units include first and second hydraulic oil lines formed in the first and second screw holders so that the first and second hydraulic oil supply units are connected to the first and second cavities to supply and return the hydraulic oil, Lt; / RTI > 3. The method according to claim 1 or 2,
The main supplying part and the hardening agent supplying part are screwed to the first and second adjusting screws so as to prevent the rotation of the first and second adjusting screws, and the first and second adjusting screws are brought into contact with the first and second screw holders, Characterized in that the foamed foam mixing head comprises a stationary ring. 3. The method according to claim 1 or 2,
And a mixing cylinder which reciprocates along a connection passage formed in the head body to communicate with the mixing chamber to open or shut off the first and second nozzle holes,
The mixing cylinder includes a first piston reciprocatingly operated in a first cylinder housing assembled to the head body, a first piston extending from the first piston to the mixing chamber by a predetermined length, And a piston axis. ≪ Desc / Clms Page number 19 > 5. The method of claim 4,
And a plurality of nozzles formed on the outer surface of the front end of the first piston shaft so as to bypass and circulate a subject and a curing agent respectively discharged through the first and second nozzle holes through a main return channel and a hardener return flow path formed in the head body, 1 < / RTI > by-pass grooves. 3. The method according to claim 1 or 2,
And a cleaning cylinder having a tip reciprocally operated from the mixing chamber to the discharge pipe so as to clean the mixture remaining in the mixing chamber,
The cleaning cylinder includes a second piston reciprocatingly operated in a second cylinder housing assembled to the head body and a second piston shaft having a distal end extending a certain length from the second piston to the discharge pipe through the mixing chamber The foamed foam having a calibrating function.

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