KR102408732B1 - Injection device of urethane foam sheet for raw material - Google Patents

Abstract

According to the present invention, since the first mixing unit, the second mixing unit, and the nozzle are each configured to be separable, it is possible to easily separate and maintain when foreign substances are caught inside or when parts are exchanged, as well as to separate the main agent and the curing agent in the first and second phases. It is possible to maximize mixing efficiency by mixing and spraying over It relates to a foaming device that sprays a solution.

Description

Foaming device for spraying a solution for manufacturing urethane foam sheet {Injection device of urethane foam sheet for raw material}

The present invention relates to a foaming device for spraying a solution for manufacturing a urethane foam sheet, and more particularly, the first mixing part, the second mixing part and the nozzle are each configured to be separable, so that foreign substances are trapped inside or easily separated when replacing parts This not only enables maintenance, but also maximizes mixing efficiency by mixing and spraying the main agent and hardener in the first and second phases. It relates to a foaming device that sprays a solution for manufacturing a urethane foam sheet, which can be set to the best mixing ratio, thereby increasing product marketability and productivity.

As is well known, in the construction field, a heat insulator is a heat insulator that performs not only large-area front insulation but also a small amount of interstitial insulation, and there is typically a curable urethane foam.

The foaming device for foaming such a urethane foam material is an aerosol method in which the raw material of the urethane foam (the subject and the curing agent) and the foaming agent are mixed and stored in a single container, and the container is coupled to one end and the trigger is pulled to make the foaming. There is a one-component foam gun of

However, since the raw material and the foaming agent are already mixed in the container, such a one-component foam gun cannot be stored for a long time because it solidifies during long-term storage. there was

Therefore, in order to solve this problem, a two-component spray gun that allows the main agent and curing agent to be mixed in the mixing chamber of the foam gun when foaming is required while stored in different containers was developed, disclosed in Korean Patent Registration No. 10-578274 has been done

Through such a two-component spray gun, the two-component spray gun mixes and foams two liquids stored in large containers with different main agents and different curing agents in the mixing chamber formed inside the spray gun.

However, since this two-component urethane foam foaming method is first mixed with the main agent and the curing agent in the mixing chamber, there was a problem that the foam gun had to be used for a single use as the two-component urethane foam was cured inside the mixing chamber during the time when the work was stopped. That is, it is economically disadvantageous and waste of resources occurs.

Second, there was a problem in that the container in which the main agent and the curing agent were stored respectively also solidified quickly after operation. Therefore, the container in which the main agent and the curing agent are stored is also a disposable container, and there is a problem in that it is economically disadvantageous and resources are wasted.

Third, since Freon gas or LPG gas is filled inside the container, there is a problem that the gas is discharged to the atmosphere during operation, causing environmental pollution.

Korean Patent Registration Publication No. 10-0578274 Korean Patent Registration Publication No. 10-1674745

The present invention has been devised to solve the above problems, and an object of the present invention is that the first mixing part, the second mixing part and the nozzle are each configured to be separable, so that foreign substances are caught inside or easily separated when replacing parts This is to provide a foaming device that sprays a solution for manufacturing urethane foam sheets that can maximize mixing efficiency by mixing and spraying the main agent and curing agent in the first and second phases.

In addition, another object of the present invention is to install a solenoid valve in the main branch pipe and the hardener branch pipe to set the main agent and the hardener at the preset best mixing ratio. is in providing.

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

A foaming device for spraying a solution for manufacturing a urethane foam sheet of the present invention for solving the above problems includes: a main body provided with a control unit; a first reservoir for storing methylene diphenyl diisocyanate (MDI), which is the main subject, at the rear of the body; a second reservoir for storing polyol, which is a curing agent, therein at the rear of the body; a support installed on the upper part of the body; a spraying unit mounted on the front end of the support to mix and spray the main agent and the curing agent; a main agent supply pipe having one end connected to the first reservoir and the other end connected to the injection unit to supply the main agent; It is characterized in that one end is connected to the second reservoir and the other end is connected to the injection unit to provide a curing agent supply pipe for supplying the curing agent.

The support is a lower support that is erected vertically; It consists of an upper support horizontally coupled to the upper part of the lower support, and further includes a joint part installed between the lower support and the upper support to rotate the upper support up and down, and the joint part is at the upper end of the lower support. The joint is fixed and supports the lower part of the upper support; a shaft rotatably coupling the joint and the upper support; Fixing pieces respectively formed in the rear of the lower and upper support of the joint; Fixtures fixed to each of the fixing pieces by shaft pins; A rotation control member is provided that is screwed to the fixture and the fixture to rotate the upper support by rotation operation, and a horizontal rotation part is formed between the lower support and the joint part to horizontally rotate the upper support and the joint part, and the horizontal rotation part is further provided. The rotating part, a gear part formed at the upper end of the lower support; a shaft groove formed in the center of the upper end of the lower support; a rotating shaft protruding to a predetermined length in the center of the lower end of the joint and coupled to the shaft groove; A drive motor is fixed to the lower end of the joint and the driving gear is meshed with the gear to rotate the joint.

The main agent supply pipe and the hardener supply pipe are branched into at least two main branch pipes and a hardener branch pipe before being connected to the spraying part and are respectively connected to the spraying part, and the spraying part is fixed to the front end of the upper support of the support and the main supply pipe and the hardener supply pipe A first mixing unit connected to the primary mixing of the main agent and the curing agent; a second mixing unit coupled to a lower portion of the first mixing unit to secondarily mix the main agent and the curing agent; A nozzle coupled to a lower portion of the second mixing unit for spraying the mixed raw material is provided, and the first mixing unit includes: a first body to which the main agent supply pipe and the curing agent supply pipe are connected; a through hole formed eccentrically on both sides of the first body to connect the main supply pipe and the hardener supply pipe to form a vortex in the raw material; a second body formed in the interior of the first body and provided with a mixing protrusion for mixing a main agent and a curing agent, the second mixing unit being screwed to a lower portion of the first mixing unit; a mixing blade rotatably mounted on the inner upper portion of the second body to mix raw materials; a guide part formed on the lower part of the mixing blade and having an inclined upper part to guide the raw material; a central flow path formed in the central portion of the guide part; The central flow path is formed radially in the guide part, and an auxiliary flow path having a smaller diameter than the central flow path is provided. The solenoid valve is controlled by the control unit to adjust the input amount of the main agent and the curing agent according to a preset value.

According to the present invention, since the first mixing unit, the second mixing unit, and the nozzle are each configured to be separable, it is possible to easily separate and maintain when foreign substances are caught inside or when parts are exchanged, Since it is mixed and sprayed throughout the car, it has the effect of maximizing the mixing efficiency.

In addition, according to the present invention, since the main branch pipe and the hardener branch pipe are equipped with solenoid valves, the main agent and the hardener can be set at a preset best mixing ratio, thereby increasing product marketability and productivity.

1 is a photograph showing a body and a support according to the present invention.
2 is a photograph showing the first and second storage bins according to the present invention.
3 is a photograph of a state in which the injection unit is mounted on the support according to the present invention.
4 is an exploded perspective view showing a horizontal rotation unit according to the present invention.
5 is an enlarged front cross-sectional view of the injection unit according to the present invention.
6 is a plan view showing the first mixing unit according to the present invention.

Hereinafter, various embodiments will be described in more detail with reference to the accompanying drawings. The embodiments described herein may be variously modified. Certain embodiments may be depicted in the drawings and described in detail in the detailed description. However, the specific embodiments disclosed in the accompanying drawings are only provided to facilitate understanding of the various embodiments. Therefore, the technical idea is not limited by the specific embodiments disclosed in the accompanying drawings, and it should be understood to include all equivalents or substitutes included in the spirit and scope of the invention.

Terms including an ordinal number such as 1st, 2nd, etc. may be used to describe various components, but these components are not limited by the above-mentioned terms. The above terminology is used only for the purpose of distinguishing one component from another component.

In this specification, terms such as "comprises" or "have" are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof. When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but it is understood that other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

Meanwhile, as used herein, a “module” or “unit” for a component performs at least one function or operation. And “module” or “unit” may perform a function or operation by hardware, software, or a combination of hardware and software. In addition, a plurality of “modules” or a plurality of “units” other than a “module” or “unit” to be performed in specific hardware or to be executed in at least one processor may be integrated into at least one module. The singular expression includes the plural expression unless the context clearly dictates otherwise.

In addition, in describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be abbreviated or omitted.

1 is a photograph showing the main body and the support according to the present invention, 2 is a photograph showing the first and second storage bins according to the present invention, and FIG.

A foaming device for spraying a solution for manufacturing a urethane foam sheet of the present invention, the main body 100 having a control unit; a first reservoir 200 for storing methylene diphenyl diisocyanate (MDI), which is the main subject, in the rear of the main body 100; a second storage container 300 for storing polyol, which is a curing agent, therein at the rear of the main body 100; a support 400 installed on the upper portion of the main body 100; a spraying unit 500 mounted on the front end of the support 400 and spraying a mixture of a main agent and a curing agent; a main agent supply pipe 600 having one end connected to the first reservoir 200 and the other end connected to the injection unit 500 to supply the main agent; It is characterized in that one end is connected to the second reservoir 300 and the other end is connected to the injection unit 500 to provide a curing agent supply pipe 700 for supplying a curing agent.

The main body 100 controls all operations according to the foaming process of the urethane foam sheet through the control unit.

The first and second storage tanks 200 and 300 store the main material and the curing agent, which are raw materials for the urethane foam sheet, respectively.

A main agent is stored in the first storage tank 200 , and the main agent is polyisocyanate, for example, methylenediphenyl diisocyanate (MDI: Methylenediphenyl diisocyanate, 4,4'-diphenylmethane diisocyanate).

remind; A curing agent is stored in the second reservoir 300, and the curing agent is an activated hydrogen compound (polyol) that reacts with polyisocyanate, and is a very common known material in a two-component urethane foam spraying device.

The support 400 is composed of a lower support 410 erected vertically on the main body 100, an upper support 420 horizontally coupled to the upper portion of the lower support 410, and the lower support 410 and A joint part 430 is provided between the upper supports 420 to rotate the upper supports 420 up and down.

The joint part 430, the joint bar 431 is fixed to the upper end of the lower support 410 to support the lower part of the upper support 420, and the joint 431 and the upper support 420 are shafts ( 432), the upper support 420 is in a rotatable state.

A fixing piece 433 is respectively formed on the lower portion and the rear of the upper support 420 of the joint 431, and a fixing member 434 is rotatably fixed to the fixing piece 433 by a shaft pin, respectively, and the A rotation control member 435 is screwed to the fixture 434 and the fixture 434 to rotate the upper support 420 up and down by the rotation operation of the rotation control member 435 .

Fixing guides are formed on both sides of the upper support 420 so that the main agent supply pipe 600 and the hardener supply pipe 700 are not sagged, thereby supporting the main agent supply pipe 600 and the hardening agent supply pipe 700 .

In addition, a horizontal rotation unit 440 formed between the lower support 410 and the joint portion 430 to horizontally rotate the upper support 420 and the joint portion 430 may be further provided.

As shown in FIG. 4 , the horizontal rotation part 440 has a gear part 441 formed in an annular shape at the upper end of the lower support 410 , and a shaft groove of a certain depth in the center of the upper end of the lower support 410 . 442 is formed.

At the center of the lower end of the joint band 431, a rotating shaft 443 that is formed to protrude to a predetermined length and coupled to the shaft groove 442 is provided,

A driving motor 444 is provided at the lower end of the joint 431 so as to mesh with the gear 441 , and the driving gear of the driving motor 444 is meshed with the gear 441 to form the driving motor 444 . It is possible to horizontally rotate the joint bar 431 by rotational driving.

The driving motor 444 is electrically connected to the control unit, and is automatically controlled according to the position of the mold in which the raw material mixed with the main agent and the curing agent is foamed to enable horizontal rotation.

5 to 6 , the injection unit 500 includes a first mixing unit 510 , a second mixing unit 520 , and a nozzle 530 .

The first mixing unit 510 is provided with a first body 511 to which the main agent supply pipe 600 and the curing agent supply pipe 700 are connected to both sides, and is formed eccentrically on both sides of the first body 511, The main agent supply pipe 600 and the hardener supply pipe 700 are connected, and a through hole 512 that penetrates to form a vortex in the raw material is provided, and an action is given to the main agent and the hardener in the first body 511 to give mixing efficiency A mixing protrusion 513 that raises the .

The second mixing unit 520 has a second body 521 screwed to a lower portion of the first mixing unit 510, and a rib is formed on the inner upper portion of the second body 521 to allow the raw material to pass therethrough, A mixing blade 522 is rotatably mounted on the rib to mix the raw materials.

A guide part 523 for guiding the raw material is formed on the lower part of the mixing blade 522, the guide part 523 has a shape protruding toward the center and the upper surface is inclined downward to facilitate the flow of the raw material. .

A central flow path 524 is formed through the central portion of the guide part 523, and an auxiliary flow path 525 is formed in the guide part radially around the central flow path 524, and the auxiliary flow path 525 is formed in the center A diameter smaller than that of the flow path 524 is formed.

The auxiliary flow path 525 has a lower diameter than the upper diameter, so that the feed rate of the raw material can be increased.

A nozzle 530 is screwed to a lower portion of the second mixing unit 520 and fixed, and a hose of a certain length is connected to the nozzle 530 to inject the raw material into the mold.

That is, the injection unit 500 of the present invention is configured such that the first mixing unit 510, the second mixing unit 520, and the nozzle 530 are each separable, so that foreign substances are trapped inside or easily separated when parts are exchanged. Therefore, maintenance can be performed, and mixing efficiency can be maximized by mixing and spraying the main agent and hardener in the first and second phases.

In addition, the main agent supply pipe 600 and the curing agent supply pipe 700 have one end connected to the main agent reservoir 200 and the curing agent reservoir 300 and the other end connected to the spraying unit 500 , the main agent supply pipe 600 . At the end of the curing agent supply pipe 700 , a main branch pipe 610 and a curing agent branch pipe 710 branching into at least two or more are formed, respectively, and are connected to the first mixing part 510 of the injection part 500 .

The main agent and hardener supplied to the injection unit 500 through the main agent supply pipe 600 and the hardener supply pipe 700 must maintain an appropriate mixing ratio.

The main branch pipe 610 and the hardener branch pipe 710 are equipped with a solenoid valve 800 capable of controlling the mixing amount of the main agent and the hardener.

The solenoid valve 800 is electrically connected to the controller, and controls the amount of the main agent and the hardener supplied through the main branch pipe 610 and the hardener branch pipe 710 under the control of the controller to mix in a preset ratio. This makes it possible to prevent defects in the urethane foam sheet, thereby maximizing marketability and productivity.

Although preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and it is common in the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Various modifications are possible by those having the knowledge of, of course, and these modifications should not be individually understood from the technical spirit or prospect of the present invention.

100: body
200: first reservoir
300: second reservoir
400: support
410: lower support
420: upper support
430: joint
440: horizontal rotation unit
500: injection unit
600: subject supply pipe
700: hardener supply pipe
800: solenoid valve

Claims (3)

a main body 100 provided with a control unit;
a first reservoir 200 for storing methylene diphenyl diisocyanate (MDI), which is the main subject, in the rear of the body 100;
a second storage container 300 for storing polyol, which is a curing agent, therein at the rear of the main body 100;
a support 400 installed on the upper portion of the main body 100;
a spraying unit 500 mounted on the front end of the support 400 and spraying a mixture of a main agent and a curing agent;
a main agent supply pipe 600 having one end connected to the first reservoir 200 and the other end connected to the injection unit 500 to supply the main agent;
A curing agent supply pipe 700 having one end connected to the second reservoir 300 and the other end connected to the injection unit 500 to supply a curing agent is provided,
The main agent supply pipe 600 and the hardener supply pipe 700 are branched into at least two main branch pipes 610 and a hardener branch pipe 710 before being connected to the spraying part 500 and connected to the spraying part 500, respectively. becomes,
The injection unit 500,
a first mixing unit 510 fixed to the front end of the upper support 420 of the support 400 and connected to the main agent supply pipe 600 and the hardener supply pipe 700 to primarily mix the main agent and the hardener;
a second mixing unit 520 coupled to the lower portion of the first mixing unit 510 to secondarily mix the main agent and the curing agent;
A nozzle 530 that is coupled to the lower portion of the second mixing unit 520 and sprays the mixed raw material is provided,
The first mixing unit 510,
a first body 511 to which the main agent supply pipe 600 and the curing agent supply pipe 700 are connected;
a through hole 512 formed eccentrically on both sides of the first body 511 to connect the main agent supply pipe 600 and the hardener supply pipe 700 to form a vortex in the raw material;
A mixing protrusion 513 formed inside the first body 511 to mix the main agent and the curing agent is provided,
The second mixing unit 520,
a second body 521 screwed to a lower portion of the first mixing unit 510;
a mixing blade 522 that is rotatably mounted on the inner upper portion of the second body 521 to mix the raw materials;
a guide part 523 formed on the lower part of the mixing blade 522 and having an inclined upper part to guide the raw material;
a central flow path 524 formed in the center of the guide part 523;
An auxiliary flow path 525 having a diameter smaller than that of the central flow path 524 is provided in a radially formed guide part with the central flow path 524 as a center,
The main branch pipe 610 and the hardener branch pipe 710 are further provided with a solenoid valve 800 to control the mixing amount of the main agent and the hardener,
The solenoid valve 800 is controlled by the control unit to adjust the input amount of the main agent and the curing agent to a preset value.
The method according to claim 1,
The support 400,
Vertically erected lower support 410;
Consists of an upper support 420 horizontally coupled to the upper portion of the lower support 410,
A joint part 430 installed between the lower support 410 and the upper support 420 to rotate the upper support 420 up and down is further included,
The joint part 430 is,
a joint 431 fixed to the upper end of the lower support 410 and supporting the lower portion of the upper support 420;
Shaft 432 for rotatably coupling the joint 431 and the upper support 420;
a fixing piece 433 formed at the rear of the lower and upper supports 420 of the joint 431, respectively;
Fixtures 434 fixed to the fixing pieces 433 by shaft pins, respectively;
A rotation control member 435 which is screwed to the fixture 434 and the fixture 434 and rotates the upper support 420 by a rotation operation is provided,
A horizontal rotation unit 440 formed between the lower support 410 and the joint 430 to horizontally rotate the upper support 420 and the joint 430 is further provided,
The horizontal rotation unit 440,
a gear portion 441 formed at the upper end of the lower support 410;
a shaft groove 442 formed in the center of the upper end of the lower support 410;
a rotation shaft 443 protruding to a predetermined length in the center of the lower end of the joint 431 and coupled to the shaft groove 442;
Spraying a solution for manufacturing a urethane foam sheet, which is fixed to the lower end of the joint arm 431 and provided with a driving motor 444 for rotating the joint 431 by meshing the driving gear with the gear 441 foaming device.
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