KR102557139B1 - Gasket buried fire door with excellent insulation performance and manufacturing method therefor - Google Patents

Abstract

A door member seated inside the door frame member and formed by combining a plate-shaped first door frame facing outdoors and a plate-shaped second door frame facing indoors, wherein the first door frame comprises an end region A gasket-embedded fire door characterized by providing a first gasket seating portion bent toward the interior, and having a first gasket containing a flame retardant foaming agent inserted into the first gasket seating portion to seal between the outdoors and the interior and A manufacturing method is provided.

Description

Gasket buried fire door with excellent insulation performance and manufacturing method therefor}

The present invention relates to a gasket-embedded fire door with improved fire resistance, heat insulation, and airtightness, and a method for manufacturing the same.

As a structure such as an entrance door or an emergency door, a fire door is installed at the entrance of a house, apartment, factory, office, etc. to block the spread of fire and flame in the event of a fire. Like general doors, fire doors are hinged with the door frame, but they must be durable to conditions such as combustion, melting, cracking, thermal decomposition and deterioration, and remain combined with the door frame even in the strong heat of a fire. Durability against distortion must also be provided to block diffusion as much as possible.

The fire door is a space between the door and the door frame, the end of the door, commonly called a wind wing, as shown in Korea Utility Model Registration No. In the form of attaching a plate-shaped wing gasket to the door frame, it can airtightly seal the inside and outside. However, in the case of attaching the airtight member in this way, the adhesive strength between the airtight member and the fire door may decrease over time during use of the installed fire door, and the airtightness and insulation performance may be lowered, and additional processing such as reattachment may be required. There are downsides to that.

For a fire door capable of securing insulation performance, technologies are known in Korean Patent Registration No. 10-2181203, 'fire door' and Korean Patent Registration No. 10-2079735, 'fire door manufacturing method'. However, since an increase in the frame constituting the door or the addition of bending and perforation processing is required for the structure of the fire door as described above, a problem of lowering productivity may occur.

Therefore, it is necessary to develop technology for a fire door and a manufacturing method capable of improving productivity by reducing the number of processing steps during the manufacturing process of a fire door and improving airtightness and insulation performance at the same time.

Korean Patent Registration No. 10-2076448 (registration date: February 05, 2020) Korean Patent Registration No. 10-2079735 (registration date: February 14, 2020) Korean Patent Registration No. 10-2181203 (registration date: November 16, 2020) Korea Utility Model Registration No. 20-0363578 (September 21, 2004)

An object of the present invention is to provide a gasket-embedded fire door and a method for manufacturing the same, which can improve airtightness and heat insulation performance by preventing the gasket from being detached from the fire door.

In addition, another technical problem to be achieved by the present invention is to provide a gasket-embedded fire door and a manufacturing method capable of improving the processing process and productivity by changing the shape of a frame constituting the fire door.

The object of the present invention is not limited to the above-mentioned object, and other objects not mentioned will be clearly understood by those skilled in the art from the description below.

In order to solve the above problem, the present invention is seated inside the door frame member, and includes a door member formed by combining a plate-shaped first door frame facing outdoors and a plate-shaped second door frame facing indoors, , The first door frame is provided with a first gasket seating portion having an end region bent toward the inside of the room, and a first gasket inserted into the first gasket seating portion to provide airtightness between the outside and the inside and including a flame retardant foaming agent. It is possible to provide a gasket-embedded fire door, characterized in that for doing.

The first gasket is provided in a rod shape having a hollow having a circular cross section and a hollow having a rectangular cross section formed side by side, and both outer circumferential surfaces of the rectangular hollow have projections inclined in one direction symmetrical to each other. it could be

An end of the first gasket seating portion may include a bent piece inclined toward the inside, and the protrusion may be fitted into the bent piece that is inclined toward the inside.

The first door frame has a first bent part at an end, the second door frame has a second bent part at an end, and the end of the second bent part is located in an inner region of the first bent part. The door frame and the second door frame may be coupled, and an outer region of the first bent portion exposed through the coupling may be provided as the first gasket seating portion.

The door member includes a C-shaped inner frame interposed in contact with the inner surface of the first bent part and the inner surface of the second bent part, and one side of the inner frame extends and contacts the inner surface of the second bent part can

A heat insulation pad may be positioned between one side of the inner frame and an inner surface of the second bent portion.

A door filler blocking heat transfer may be positioned inside the door member provided by combining the first door frame and the second door frame.

In addition, in order to solve the above problem, the present invention comprises the steps of forming a first gasket seating portion at an end region of a plate-shaped frame, preparing a first door frame, and preparing a second door frame; forming a door member by combining a second door frame with a first door frame such that the first gasket mounting portion is exposed toward the interior of a space where a fire door is installed; and inserting and fixing a first gasket containing a flame retardant foaming agent into the first gasket seating portion.

Preparing the first door frame and the second door frame may include preparing a first door frame by bending an end region of a plate-shaped frame to form a first bent portion, and bending an end portion of another plate-shaped frame to form a second bent portion. It may form a part and prepare a second door frame.

Forming the door member is to combine the first door frame and the second door frame so that an end portion of the second bent portion is positioned inside the first bent portion, and the outer region of the exposed first bent portion is the first bent portion. 1 may be formed as a gasket seating part.

The manufacturing method of the gasket-embedded fire door further includes preparing a c-shaped inner frame and coupling it between the first door frame and the second door frame, wherein the inner frame is formed by the inner surface of the first bent portion and the second door frame. It may be coupled to be in contact with the inner surface of the bent portion, and one side of the inner frame may be extended and coupled to come into contact with the inner surface of the second bent portion.

Forming the door member may include forming an insulation pad between one side of the inner frame and an inner surface of the second bent portion.

Forming the door member may include bonding a door filler to block heat transfer to an inner surface of the first door frame facing the second door frame.

A gasket-embedded fire door and method for manufacturing the same according to an embodiment of the present invention have the advantage of improving airtightness and heat insulation performance by preventing the gasket from being detached from the fire door as the first gasket is seated and embedded in the first gasket seating portion. . In addition, there is an effect of improving the processing process and productivity by changing the shape of the frame constituting the fire door. Furthermore, since the buried first gasket and the heat insulating pad positioned between the inner frame and the second door frame are arranged to block heat transfer to each other, the anti-condensation function can be further improved.

1 is a front view of a gasket-embedded fire door according to an embodiment of the present invention;
Figure 2 is a cross-sectional view along II' of Figure 1;
Figure 3 is a cross-sectional view along II-II' of Figure 1;
4 is an enlarged view of area A of FIG. 2;
5 is a perspective view showing a first gasket according to an embodiment of the present invention;
6 is a process flow chart showing a method of manufacturing a gasket-embedded fire door according to an embodiment of the present invention;
7 is a cross-sectional view showing a fire door as a comparative example test body;
8 is a graph of test conditions and test procedures showing the airtightness test method of windows and doors;
9 is a graph showing airtightness results of Experimental Examples and Comparative Examples according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments introduced below are provided as examples to sufficiently convey the spirit of the present invention to those skilled in the art. Accordingly, the present invention may be embodied in other forms without being limited to the embodiments described below. Also, in the drawings, the lengths and thicknesses of layers and regions may be exaggerated for convenience. Like reference numbers indicate like elements throughout the specification.

1 is a front view of a gasket-embedded fire door according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along II' of FIG. 1, FIG. 3 is a cross-sectional view taken along II-II' of FIG. 1, and FIG. 2 is an enlarged view of area A, FIG. 5 is a perspective view showing a first gasket according to an embodiment of the present invention, and FIG. 6 is a process flow diagram showing a manufacturing method of a gasket-embedded fire door according to an embodiment of the present invention, Figure 7 is a cross-sectional view showing a fire door as a comparative example test body, Figure 8 is a graph of the test conditions and test order showing the airtightness test method of windows and doors, Figure 9 is the airtightness results of the experimental example and the comparative example according to the embodiment of the present invention is a graph showing

1 to 5, the gasket-embedded fire door 10 according to an embodiment of the present invention is seated inside the door frame member 200, and includes a plate-shaped first door frame 110 facing the outdoors, and an indoor It includes a door member 100 formed by combining a plate-shaped second door frame 120 opposite to the first door frame 110, and the first gasket seating portion having an end region bent toward the room ( 100a) may be provided, and a first gasket 510 including a flame retardant foaming agent may be provided, which is inserted into the first gasket mounting portion 100a to provide airtightness between the outdoors and indoors.

In detail, the gasket-embedded fire door 10 is coupled between the door member 100 and the door frame member 200 and includes a hinge member 300 connecting the door frame member 200 and the door member 100, , It may include a handle 400 for opening and closing the user's fire door.

The door frame member 200 may be provided by combining a first door frame frame 210 fixed to a wall surface and a second door frame frame 220 having a shape corresponding to the end surface of the door member 100, An insulator 230 such as mineral wool may be filled and positioned in an inner space formed by combining the first door frame 210 and the second door frame 220 . For example, the door frame member 200 may have a second gasket seating portion in an area opposite to the end area of the second door frame 120. The second gasket seating portion may include a second door frame bent portion 222 ) can be provided by forming

The gasket-embedded fire door 10 may further include a second gasket 520 inserted into the second gasket seating portion and containing a flame retardant foaming agent. Therefore, when a fire occurs, it is foamed by heat to block the space between the door member 100 and the door frame member 200, thereby blocking indoor and outdoor air, thereby maintaining confidentiality.

In the door member 100 seated inside the door frame member 200 and formed by combining a plate-shaped first door frame 110 facing outdoors and a plate-shaped second door frame 120 facing indoors In the interior of the door member 100 prepared by combining the first door frame 110 and the second door frame 120, a door filler 140 blocking heat transfer may be located. For example, the door filler 140 may include mineral wool, but is not limited thereto. In addition, a flame retardant polyurethane adhesive may be interposed between the door filler 140 and the first door frame 110 or between the second door frame 120 and the door filler 140 to fix the door filler 140 . Therefore, since the door filler 140 that blocks heat transfer between the flame retardant adhesive and the fire door is provided inside the fire door, flame retardancy and heat insulation properties of the fire door can be improved.

The first door frame 110 has a first bent portion 112 at an end portion such that the end area is bent toward the interior to provide a first gasket seating portion 100a, and the second door frame 120 has a first bent portion 112 at an end portion. A second bent part 122 is provided, and an end of the second bent part 122 is positioned in an inner region of the first bent part 112 so that the first door frame 110 and the second door Frame 120 may be coupled. An outer region of the first bent portion 112 exposed through the coupling may be provided as the first gasket seating portion 100a. In this case, the end regions refer to upper, lower, left, and right end regions of the fire door 10 .

Furthermore, the door member 100 includes a c-shaped inner frame 130 interposed in contact with the inner surface of the first bent part 112 and the inner surface of the second bent part 122, but the inner frame ( 130) may extend and come into contact with the inner surface of the second bent portion 122. That is, by interposing the inner frame 130 between the first bent portion 112 and the second bent portion 122, the first door frame 110 and the second door frame 120 can be easily assembled without a complicated bending process. can be combined.

The first gasket 510, which is inserted into the first gasket seating portion 100a and provides airtightness between the outdoor and indoor spaces and includes a flame-retardant foaming agent, includes a hollow 512a having a circular cross section and a hollow hollow having a rectangular cross section (as shown in FIG. 5). 514a) may be provided in a rod shape having hollows formed side by side, and protrusions 516 inclined in one direction may be positioned symmetrically on both outer circumferential surfaces of the rectangular hollows 514a. The circular outer circumferential surface 512 of the first gasket 510 is in contact with the second door frame 220 of the door frame member 200 and the end of the second door frame 120 of the door member 100, and the square outer circumferential surface 514 The lower surface may be inserted to contact the first gasket seating portion 100a. That is, the first gasket 510 is coupled to the door member 100 in the form of being embedded in the first gasket mounting portion 100a, and is closely adhered between the door member 100 and the door frame member 200 to allow indoor and outdoor air. can block In addition, in the event of a fire, the first gasket 510 is further inflated by the action of the flame retardant foaming agent, thereby further blocking indoor and outdoor air and providing airtightness to effectively prevent fire or flame from spreading.

In this case, the end of the first gasket seating portion 100a has a bent piece 112a inclined toward the inside, and the protrusion 516 of the first gasket 510 is formed on the inside of the inclined bent piece 112a. It may be fitted into. Accordingly, it is possible to further assist in fixing the position of the first gasket 510 inserted (embedded) in the door member 100 .

An insulating pad 150 may be positioned between one side of the inner frame 130 extending to come into contact with the inner surface of the second bent part 122 and the inner surface of the second bent part 122 . That is, since the heat insulation pad 150 located between the inner frame 130 and the second door frame 120 is spaced apart from the embedded first gasket 510, it is disposed in a structure in which heat transfer is blocked, The anti-condensation function can be further improved. For example, the heat insulating pad 150 may include a ceramic material, but is not limited thereto. In addition, although not shown in the drawings, the heat insulating pad 150 is also located on the inner surface of the inner frame 130, that is, the surface facing the door filler 140, so that heat insulating performance can be further improved.

1 to 6, in the method of manufacturing a gasket-embedded fire door 10 according to an embodiment of the present invention, first, a first gasket seating portion 100a is formed at an end region of a plate-shaped frame, and a first door frame is formed. 110 may be prepared, and the second door frame 120 may be prepared (S110).

In detail, in preparing the first door frame 110 and the second door frame 120 (S120), the end region of the plate-shaped frame is bent to form the first bent portion 112, and the first bent portion 112 is formed. The second door frame 120 may be prepared by preparing the door frame 110 and bending an end of another plate-shaped frame to form the second bent portion 122 . Furthermore, it may further include preparing a C-shaped inner frame 130 by bending an end of another rectangular plate-shaped frame, and one side of the inner frame 130 may be bent in a more extended form than the other side. . Here, the ends of the first door frame 110 and the second door frame 120 may be areas corresponding to the top, bottom, left and right sides of the door member 100 . In addition, as an example, preparing the first door frame 110 and the second door frame 120 (S120) includes forming perforated holes for riveting and joint fixing to be performed in the future, before the bending process. It may include performing NCT processing to do. The bending shape of the first door frame 110 is simplified compared to the conventional method, thereby reducing the process time. In addition, the end of the bent portion 112 of the first door frame 110 forms a bent piece 112a inclined toward the inside, so that the first gasket 510 is inserted or buried in the first gasket mounting portion 100a in the future. ) can be more helpful in fixing the position of

Next, the door member 100 is formed by combining the second door frame 120 with the first door frame 110 so that the first gasket mounting portion 100a is exposed toward the interior of the space where the fire door is installed. It can (S120). In this case, coupling the inner frame 130 between the first door frame 110 and the second door frame 120 may be further included.

In addition, in forming the door member 100 (S120), the first door frame 110 and the second bent portion 122 are positioned inside the first bent portion 112. The second door frame 120 may be coupled, and an outer region of the exposed first bent portion may be formed as the first gasket seating portion 100a.

In this case, the inner frame 130 is coupled so as to be in contact with the inner surface of the first bent part 112 and the inner surface of the second bent part 122, and one extended side of the inner frame 130 is connected to the inner surface of the second bent part 122. 2 may be coupled to the bent portion 122 in contact with the inner surface.

Furthermore, forming the door member 100 (S120) may include forming an adiabatic pad 150 between one side of the inner frame 130 and the inner surface of the second bent portion 122. there is. That is, the insulation pad 150 may be positioned on both the inner surface (surface facing the door filler) and the outer surface (surface facing the second door frame) of the inner frame 130 of the fire door completed in the future.

In addition, forming the door member 100 (S120) bonds the door filler 140 to the inner surface of the first door frame 110 facing the second door frame 120 to block heat transfer. may include doing

If the forming of the door member (S120) is described in detail, for example, the first door frame 110 and the inner frame 130 having the first bent portion 112 are fixed using a method such as rivet fixing. After the combination, a door lock reinforcement process and a hinge reinforcement process for door lock installation and coupling with the hinge member 300 may be performed. In addition, an insulating pad 150 made of ceramic may be attached to the inner surface of the inner frame 130 .

Next, the door filler 140 including a heat insulating material such as mineral wool is applied to the inner surface of the first door frame 110 facing the second door frame 120, that is, the inner region of the first bent portion 112. It can be attached using flame retardant polyurethane adhesive.

Next, in the second door frame 120, the striker reinforcement and the fire cap may be fixed to some regions of the left and right second bent portions 122 with rivets.

In addition, an insulating pad 150 made of ceramic may be attached to the outer surface of the inner frame 130 . Therefore, when the first door frame 110 and the second door frame 120 are coupled in the future, the insulation pad 150 will be positioned between one side of the inner frame 130 and the inner surface of the second bent portion 122. be able to

Next, the first door frame 110 and the second door frame 120 are positioned so that the end of the second bent portion 122 of the second door frame 120 is located inside the first bent portion 112. ) can be combined. That is, the first door frame 110 and the second door frame 120 may be coupled in a form in which the second bent portion 122 surrounds the outer circumferential surface of the inner frame 130 .

Therefore, through the above process, the inner frame 130 is installed between the first door frame 110 and the second door frame 120 so that the first gasket mounting portion 100a is exposed toward the interior of the space where the fire door is installed. It is combined to form the door member 100 (S120).

Finally, the door member 100 may be formed by inserting and fixing the first gasket 510 containing the flame retardant foaming agent into the first gasket mounting portion 100a (S130). Before the first gasket 510 is inserted, a painting operation may be performed on the exposed surfaces of the first door frame 110 and the second door frame 120 .

The manufacturing method of the gasket-embedded fire door may further include forming the door frame member 200 while forming a second gasket seating portion in an area opposite to the end area of the second door frame 120 (S140). there is.

Furthermore, the step of inserting and fixing a second gasket 520 containing a flame retardant foaming agent into the second gasket mounting portion (S150) may be further included, so that the door member 100 is seated on the door frame member 200. A step of combining the door frame member 100 and the door member 200 using the hinge member 300 (S160) may be included.

Hereinafter, the gasket-embedded fire door 10 according to the present invention will be described with reference to the following experimental examples and FIGS. 7 to 9. The following experimental examples are only examples for explaining the present invention, but the present invention is not limited thereto. .

Test specimen preparation

A silicone expandable flame retardant gasket (10 mm) was provided as a first gasket and a second gasket, and a door frame member filled with mineral wool (100 kg/m ³ ) and a flame retardant polyurethane adhesive filled with mineral wool (100 kg/m ³ ) were used. By combining the door members, a gasket-embedded fire door 10 of 1100 × 2200 mm was formed. In addition, in the door member, a 3T heat insulation pad is formed between the inner frame and the second door frame, and a 9T heat insulation pad is formed at an end of the second door frame facing the second gasket seating portion of the door frame member.

Comparative Example Test specimen preparation

For comparison with the experimental example, as shown in FIG. 7, a fire door was prepared as a comparative example. A silicone expandable flame retardant gasket (10 mm) was formed only on the door frame member filled with mineral wool (100 kg/m ³ ). A door member is formed using mineral wool (120 kg/m ³ ) filling and flame retardant polyurethane adhesive, but a heat insulating pad is formed at a position corresponding to the first gasket seating portion of the door member, and a plate-shaped wing gasket (Fig. 7) was attached. At the edge of the door member facing the door frame member, an insulating pad having a thickness of 3T, 9T, 13T, and 33T was formed inside the inner frame as shown in FIG. 7 . The door frame member and the door member have the same size as the experimental example, and a fire door of 1100 × 2200 mm was manufactured.

Thermal transmittance test

Thermal transmittance was measured using KS F2278: 2017 (insulation test method for windows and doors). The temperature of the constant temperature and humidity room was set at 20 ° C, the humidity of the constant temperature and humidity room was 50% R.H., the temperature of the cold room was 0 ° C, and the air flow rate of the cold room was 2 m / s. The test equipment specifications are shown in Table 1 below.

constant temperature room (m) heating box (m) Low temperature room (m) Heat transfer opening of test specimen (m) 2.8×3.7×3.4
(W×H×D) 2.0×2.2×0.8
(W×H×D) 2.5×3.7×3.4
(W×H×D) 1.1×2.2
(W×H)

As a pretreatment, both the fire doors of the experimental example and the comparative example were tested after curing for 24 hours or more in a constant temperature and humidity room with an indoor temperature of 20 ± 3 ° C and an indoor relative humidity of 50 ± 5% R.H. After installing the specimen of the experimental example on the specimen attachment frame, the gap between the specimen attachment frame and the specimen was filled with an insulating material and urethane foam, and then closed with silicone. Then, the test body was divided into 9 equal parts, and the temperature was measured by attaching T-type thermocouples to a total of 9 points in the center of each point. The comparative example was also installed on the specimen attachment frame as described above, and the temperature was measured in the same way.

Confidentiality test

The airtightness of the test specimens of the experimental example and the comparative example was measured using KS F2292: 2019 (airtightness test method of windows and doors). The test environment was room temperature of 21 ± 1 ° C, room humidity of 51 ± 3% R.H., atmospheric pressure of 1003 ± 11 hPa, and the area of the test specimen was the same for both experimental and comparative examples. The test conditions and procedure are shown in FIG. 8 . In addition, each specimen was attached in the direction of the pressure box after as close as possible to the opening of the specimen attachment frame.

Results - Thermal Transmittance Test

In the case of the thermal transmittance test, the experimental example showed a lower value than the comparative example, as shown in Table 2. Since low thermal transmittance means better thermal insulation properties, the processing process and productivity are improved by changing the shape of the frame, compared to the conventional fire door using more insulation pads and filling more mineral wool, according to an embodiment of the present invention. It can be seen that the insulation performance of the fire door is also further improved.

metrics comparative example Experimental example 1 time Episode 2 3rd time average 1 time Episode 2 3rd time average Double surface heat transfer resistance
[(m ² K)/W] surface heat transfer resistance 0.109 0.109 0.109 0.109 0.18 0.18 0.18 0.18 correction value 0.006 0.006 0.006 0.006 -0.02 -0.02 -0.02 -0.02 Thermal transmittance resistance [(m ² ·K)/W] 0.850 0.842 0.841 0.844 1.064 1.053 1.056 1.058 Thermal transmittance [W/(m ² K) 1.177 1.188 1.189 1.185 0.940 0.950 0.947 0.946

Results - Confidentiality Test

9 (a) is a confidentiality level graph of a comparative example, and (b) is a confidentiality level graph of an experimental example. As shown in Table 3 and FIG. 9, in the case of the airtightness test, the comparative example (lowest solid line) was also judged to have a first grade airtightness, but the experimental example (lowest dotted line) had a higher ventilation rate than the comparative example under the same pressure. It was confirmed that it was small, and it can be seen that it is an excellent characteristic that is more improved than the airtightness of the comparative example.

metrics comparative example Experimental example Pressure difference (Pa) 10 30 50 100 10 30 50 100 Aeration (m ³ /(h m ² ) 0.86 1.31 1.56 1.94 0.28 0.78 0.96 1.49 Confidentiality rating 1st class 1st class

A gasket embedded fire door 10 and a method of manufacturing the same according to an embodiment of the present invention are such that the first gasket 510 is seated and embedded in the first gasket seating portion 100a, so that the gasket 510 is detached from the fire door 10. There is an advantage that airtightness and insulation performance can be improved by preventing this. In addition, there is an effect that can improve the processing process and productivity by changing the shape of the frame constituting the fire door (10). Furthermore, the heat insulation pad 150 positioned between the buried first gasket 510, the inner frame 130, and the second door frame 120 is disposed in a structure to block heat transfer to each other, thereby further improving the anti-condensation function. can

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art will variously modify and change the present invention within the scope not departing from the spirit and scope of the present invention described in the claims below. You will understand that it can be done.

10; Gasket Buried Fire Door
100; door member
100a; First gasket seating part
110; 1st door frame
112; 1st bend
120; 2nd door frame
122; 2nd bent part
130; inner frame
140; door filler
150; insulation pad
200; door frame member
210; 1st door frame
220; 2nd door frame
230; insulator
300; hinge member
400; handle
510; 1st gasket
520; 2nd gasket

Claims (13)

A door member seated inside the door frame member and formed by combining a plate-shaped first door frame facing outdoors and a plate-shaped second door frame facing indoors,
The first door frame includes a first gasket seating portion having an end region bent toward the inside of the room,
A first gasket inserted into the first gasket seating portion to seal between outdoors and indoors and including a flame retardant foaming agent;
The first door frame has a first bent part at an end, the second door frame has a second bent part at an end, and the end of the second bent part is located in an inner region of the first bent part. The door frame and the second door frame are coupled,
The door member includes a C-shaped inner frame contacting and interposed between the inner surface of the first bent part and the inner surface of the second bent part, one side of the inner frame extending and contacting the inner surface of the second bent part,
Inside the door member prepared by combining the first door frame and the second door frame, a door filler for blocking heat transfer is located,
Between one side of the inner frame and the inner surface of the second bent portion And an insulation pad is positioned between the inner frame and the door filler,
The first gasket is provided in a rod shape having a hollow having a circular cross section and a hollow having a rectangular cross section side by side, and protrusions having an inclination toward one direction are symmetrical to each other on both outer circumferential surfaces of the rectangular hollow,
A bent piece formed at an end of the first bent portion and inclined inwardly is further provided, and the protrusion of the first gasket is fitted into the inclined bent piece,
Fixing the position of the first gasket inserted into the first gasket seating portion through the combination of the bent piece and the protrusion ,
The first gasket is a silicone expandable flame retardant gasket, the door filler is mineral wool, and a flame retardant polyurethane adhesive is used to manufacture the door member; characterized in that, the gasket embedded type fire door.
delete delete delete delete delete delete A first gasket seating portion is formed at the end region of the plate-shaped frame to prepare a first door frame, and a second door frame is prepared, and the first bent portion is formed by bending the end region of the plate-shaped frame to form the first door frame. preparing, bending an end of another plate-shaped frame to form a second bent portion, and preparing a second door frame;
A second door frame is coupled to the first door frame so that the first gasket seating part is exposed toward the interior of the space where the fire door is installed, and the end of the second bent part is located inside the first bent part of the first door. forming a door member by combining a frame and the second door frame; and
Inserting and fixing a first gasket containing a flame retardant foaming agent into the first gasket seating portion,
Forming the door member further includes preparing a c-shaped inner frame and coupling it between the first door frame and the second door frame, wherein the inner frame is formed by the inner surface of the first bent portion and the second bent portion. coupled to be in contact with the inner surface of the inner frame, and one side of the inner frame is extended and coupled to the inner surface of the second bent part;
Inside the door member prepared by combining the first door frame and the second door frame, a door filler for blocking heat transfer is located,
Between one side of the inner frame and the inner surface of the second bent portion And an insulation pad is positioned between the inner frame and the door filler,
The first gasket is provided in a rod shape having a hollow having a circular cross section and a hollow having a rectangular cross section side by side, and protrusions having an inclination toward one direction are symmetrical to each other on both outer circumferential surfaces of the rectangular hollow,
A bent piece formed at an end of the first bent portion and inclined inwardly is further provided, and the protrusion of the first gasket is fitted into the inclined bent piece,
Fixing the position of the first gasket inserted into the first gasket seating portion through the combination of the bent piece and the protrusion,
The first gasket is a silicone expandable flame retardant gasket, the door filler is mineral wool, and a flame retardant polyurethane adhesive is used to manufacture the door member; characterized in that, the manufacturing method of the gasket embedded type fire door. delete delete delete delete delete