KR102275059B1 - Plastic profile welding device for window frame - Google Patents

Abstract

The present invention relates to a seamless welding device for window and door frames that can improve durability by welding the four corners of a profile product for windows and doors manufactured in the form of a square frame in a structure in which the cut surfaces of the concave-convex shape are joined.

Description

Window frame seamless welding device {Plastic profile welding device for window frame}

The present invention relates to a window frame seamless welding device, and more particularly, to a window frame seamless welding device capable of improving the welding strength of the welded part.

In general, windows and doors are composed of a window frame installed in an opening of a building and a window sill coupled thereto, and are divided into opening and closing doors, sliding doors, etc. according to the opening and closing method, and divided into wooden windows, synthetic resin windows, metal windows, etc. according to the material.

Among them, the window frame and window sill of the synthetic resin window are formed in the form of a rectangular frame by bonding between the synthetic resin profiles.

In this case, each end of the profile is cut in an oblique shape of approximately 45° and then welded with the ends facing each other to form a rectangular frame-shaped window frame and a window sill.

At this time, the welding between the profiles is performed by the conventional synthetic resin profile welding apparatus for windows and doors disclosed through Korean Patent Registration No. 10-1364023 (published on February 18, 2014).

Specifically, in the synthetic resin profile welding device for windows and doors, the profiles cut in an oblique shape are fixed to the clamps, respectively.

Then, a heating plate is inserted between the fixed profiles, and the opposite profile ends are heated and melted by contact with the heating plate to form molten portions, respectively.

Then, before the molten areas are hardened, they are joined to each other so that welding is made between the profiles.

However, in the conventional window and door synthetic resin profile products, most of the cut surfaces of the profiles that are heated and melted by the heating plate are formed as flat surfaces, so the joint cross-sectional area of the profile is not so wide.

That is, the profile joined in a structure where the molten cut surface is in contact with the flat surface as described above has weak welding strength, so when an external force is intensively applied to the edge of the window during construction or movement of the window, the welded portion of the profile may fall. There is a problem.

The present invention has been devised to solve the above problems, and it is possible to improve welding strength by welding the four corners of a profile product for windows and doors manufactured in the form of a square frame in a structure in which the cut surfaces of the concave-convex shape are in contact with each other. Its purpose is to provide

The present invention for implementing the object as described above is provided with upper and lower pressing pieces with blades formed on each side to fix the frame parts made of synthetic resin, respectively, and left and right clamps installed so as to be reciprocally movable in the lateral direction along the rail; and a heating plate installed between a pair of frame parts fixed by the left and right clamps so as to be able to put in or out and provided with a concave-convex part; to the heating plate to which the end of the pair of frame parts is put when the left and right clamps are moved. It comes into contact to form a concave-convex surface at the end of the frame portion to face, and at the same time, the blade cuts the burr that is pushed out of the end of the frame portion, and after the heating plate is discharged, the concave-convex surface formed at the end of the frame portion is mutually joined We provide a seamless welding device for window frames.

According to the present invention according to the above configuration, the four corners of the profile product for windows and doors produced in the form of a square frame are welded in a structure in which the cut surfaces of the concave-convex shape abut, thereby improving durability.

In addition, the end cut surface of the frame part constituting the four sides of the profile product for windows and doors is formed as an uneven surface, but by forming the edge in contact with at least the indoor side of the cut surface as a flat surface, a clean welding line can be realized when viewed from the outside.

1 is an elevation view of a synthetic resin profile product for windows and doors according to an embodiment of the present invention;
Figure 2 is a major perspective view showing a state in which the cut surface of the synthetic resin profile product for windows and doors according to an embodiment of the present invention is heated and melted;
3 is an enlarged cross-sectional view of part 'A' of FIG. 1;
4 (a), (b) is a view showing a process of bonding after heating and melting the end of the frame portion using a heating plate according to an embodiment of the present invention;
5 is a cross-sectional view taken along line II' of FIG. 1;
6 is a perspective view of a seamless welding apparatus according to an embodiment of the present invention;
7 is a view showing a blade according to an embodiment of the present invention;
8 is a cross-sectional view showing a vacuum suction port of the left and right clamps according to an embodiment of the present invention;
9 is a plan view showing an operating state of a heating plate according to an embodiment of the present invention;
10 is a perspective view of a heating plate according to an embodiment of the present invention;
11 and 12 are views showing an operating state of a seamless welding apparatus according to an embodiment of the present invention;
13 is a view comparing the welding process according to the prior art (a) and the present invention (b);
14 is a plan view showing a state in which a seamless welding apparatus according to an embodiment of the present invention is disposed on a main frame;
15a is a side cross-sectional view of the profile products for windows and doors of Example 1, Comparative Example 1 and Reference Examples 1 and 2 of the present invention;
15b is a side cross-sectional view of the profile product for windows and doors of Example 2 and Comparative Example 2 of the present invention;
16a is a schematic plan view of a specimen for welding strength measurement;
16B is a schematic plan view showing a portion to which a force is applied when measuring weld strength.

Hereinafter, the configuration and operation of specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Here, in adding reference numerals to the components of each drawing, it should be noted that only the same components are marked with the same reference numerals as much as possible even though they are displayed on different drawings.

1 is an elevation view of a synthetic resin profile product for windows and doors according to an embodiment of the present invention, and FIG. 2 is a major perspective view showing a state in which a cut surface of a synthetic resin profile product for windows and doors according to an embodiment of the present invention is heated and melted; 3 is an enlarged cross-sectional view of part 'A' of FIG. 1 .

Referring to FIG. 1 , the synthetic resin profile product 1 for windows and doors according to a preferred embodiment of the present invention includes a frame portion 10 and a welding portion 20 .

The configuration of the present invention will be described in detail as follows.

The frame part 10 is the main outer frame of the window frame and the window frame constituting the window and door, and is formed by extrusion molding of synthetic resin. At least four of these frame portions 10 are cut at both ends of each frame portion 10 at an oblique angle of approximately 45° so that at least four of them can be arranged in a rectangular frame shape.

The welding part 20 is a part to be welded so that the four frame parts 10 can be manufactured as the synthetic resin profile product 1 for windows and doors in the form of a square frame. These welded portions 20 are butt-formed after both ends of each frame portion 10 are heated and melted through a seamless welding apparatus 100 to be described later.

Referring to FIG. 2 , both ends of the frame part 10 are formed with concavo-convex surfaces 21 in the welding part 20 to increase welding strength.

That is, when the cut surface of the welding part 20 is melted and joined in a flat shape as in the prior art, the welding strength is low, and when an external force is applied to the edge of the frame part 10 , the welding part 20 may easily fall off.

On the other hand, when the cut surface of the welding part 20 is formed as the uneven surface 21 and is butt-welded to each other, higher welding strength can be obtained compared to the flat type.

In other words, as shown in FIG. 3 , as the cut surface of the welding portion 20 is formed as the uneven surface 21 , the joint area of the welding portion 20 is widened, and the uneven surface 21 is engaged with each other. By joining, the welding strength of the welding part 20 can be improved.

Accordingly, even if the external force is concentrated on the corner of the frame part 10 welded in the form of a square frame, the external force can be dispersed by the concave-convex surface 21, thereby preventing the welding part 20 from easily falling by external force. can do it

In the present invention, the welding strength of the welding portion 20 may be improved by 10 to 100% compared to the case in which the uneven surface is not included.

The improvement rate of the welding strength can be calculated through the following [Equation 1].

[Equation 1]

[(X-Y) × 100]/Y

X: Welding strength of the weld including the uneven surface (kgf/cm2)

Y: Welding strength (kgf/cm2) of the welding part not including the uneven surface

The welding strength may be the maximum value at which fracture occurs after applying a pressure of 50 mm/min to the welding portion of each corner with a cross head using a universal testing machine (UTM) (see FIG. 16B ).

Where X is the weld strength of the weld including the concave-convex surface in the synthetic resin profile product for windows and doors, Y is the weld strength of the weld that does not include the concave-convex surface in the synthetic resin profile product for windows and doors, wherein X and Y are windows and doors of the same standard It is assumed that it is a value measured in a profile product for use. The reason is that the use of profile products for windows and doors is largely divided into profiles for window sills or profiles for window frames, and the specifications for each use are very diverse, and the larger the size of the product, the greater the welding strength of the weld. In order to accurately compare the welding strength improvement rate according to the following conditions, it must be assumed that the use is the same and the profile products for windows and doors of the same standard are used. Here, the same standard may mean, for example, that the dimensions are the same within a tolerance range allowed in the art (for example, ±0.3, etc.).

The improvement rate of the welding strength may be 10 to 100% or 10 to 55%. When the improvement rate of the welding strength does not satisfy the above range, the welding strength improvement effect may be insignificant compared to the conventional window and door synthetic resin profile products.

4, the welding part 20 is a burr that is pushed out of the cut surface while the end cut surface of the frame part 10 is heated and melted to the concave-convex surface 21 by the heating plate 120 of the welding apparatus 100 ( Burr) 20a (see FIG. 11) may occur. In this case, as the cut surface of the burr 20a is formed as a sawtooth-shaped uneven surface 21, even if the burr 20a is removed, the appearance of the welding line exposed to the outside of the welding part 20 is rough in a zigzag shape. have no choice but to

To prevent this, the cut surface of the welding part 20 is formed as a concave-convex surface 21, but the edge of the cut surface in contact with at least the indoor side surface 10a of the frame part 10 may be formed as a flat surface 23. have.

Accordingly, even when the protruding burr 20a is removed, the welding line exposed to the outside of the welding part 20 is formed in a straight line by the flat surface 23, so that a clean appearance (refer to FIG. 1 ) can be obtained.

In this case, in the present invention, an example of the case in which the flat surface 23 is formed on the edge of the cut surface in contact with at least the indoor side surface 10a of the frame part 10 has been shown and described, but the present invention is not limited thereto, and the flat surface ( 23) may be formed on both the edges of the cut surface in contact with the inner and outer side surfaces of the frame portion 10, of course.

Referring to FIG. 5 , the welding part 20 may further include a concave-convex auxiliary welding surface 25 formed in the hollow part of the frame part 10 .

The auxiliary welding surface 25 is to be formed through an internal burr 25a that protrudes while being pushed into the hollow of the frame part 10 when the end of the frame part 10 is heated and melted using the heating plate 120 . can

The inner burr 25a may be formed in the shape of a ribbon that is rounded while being split into two branches while the bonding surface is curved in the concave-convex shape by the concave-convex auxiliary welding surface 25 . It is possible to improve the welding strength of the welding portion 20 through the auxiliary welding surface 25 of the concave-convex shape.

Meanwhile, in FIGS. 2 to 5, an example of the case where the joint surface of the concave-convex surface 21 or the auxiliary welding surface 25 is formed in a sawtooth shape has been illustrated and described, but it is not limited thereto, and the joint surface is a square, polygonal or It goes without saying that various modifications such as a hemispherical shape can be applied.

Referring back to FIG. 3 , in the welding portion 20 having the above structure, the concave-convex frame D of the concave-convex surface 21 may be formed to have a depth of 0.5 to 2.0 mm or 1.0 to 1.5 mm.

When the depth of the concave-convex frame D of the concave-convex surface 21 is less than the above range, there is a fear that the welding strength may be lowered as there is no significant difference between the conventional cut surface and the welded portion formed with the flat surface.

Conversely, when the depth of the concave-convex frame D of the concave-convex surface 21 exceeds the above range, there is a risk that the dimensions of the frame unit 10 may be changed as both ends of the frame unit 10 need to be heated and melted more than necessary. have.

An embodiment of the seamless welding apparatus 100 for manufacturing the synthetic resin profile product 1 for windows and doors as described above will be described in detail.

Referring to FIG. 6 , the seamless welding apparatus 100 according to an embodiment of the present invention includes left and right clamps 110 and a heating plate 120 .

First, the left and right clamps 110 are provided with upper and lower pressing pieces 111 and 112 having a blade 113 formed on each side to fix the frame portion 10 made of a synthetic resin material to be welded, respectively, these left and right clamps ( 110) is installed so as to reciprocate in the transverse direction along the rail (R) by the forward and backward operation of the actuator (110a).

In this case, the upper pressing piece 111 is installed to be reciprocally movable up and down by the operation of the actuator 111a, thereby pressing the upper surface of the frame part 10 mounted on the upper surface of the lower pressing piece 112. can be fixed At this time, the upper surface of the lower pressing piece 112 is seated in abutment with the indoor side surface 10a of the frame part 10 .

In addition, the blade 113 is integrally formed on the opposite surface of the upper and lower pressing pieces 111 and 112 . The blade 113 is formed opposite to each other on the lower end of the opposite surface of the upper pressing piece 111 and the upper end of the opposite surface of the lower pressing piece 112 .

Referring to FIG. 7 , the tip of the blade 113 is inclined at a predetermined angle θ from the vertical surface 113a and the vertical surface 113a toward the burr 20a of the welding part 20. To the inclined surface 113b. can be formed.

That is, it is easy to adjust the angle θ of the inclined surface 113b by the vertical surface 113a, and thus the burr 20a can be easily removed through the inclined surface 113b of the blade 113.

In this case, it is preferable that the angle θ of the inclined surface 113b is 15 to 50° or 20 to 45°. When the angle θ of the inclined surface 113b is formed below the above range, the tip of the blade 113 is sharpened more than necessary, so there is a risk of being easily damaged when repeatedly used. Conversely, when the angle θ of the inclined surface 113b exceeds the above range, it may be difficult to smoothly remove the burr 20a.

Referring to FIG. 8 , a vacuum suction port 117 may be provided in the upper and lower pressing pieces 111 and 112 . The vacuum suction port 117 adsorbs the surface of the seated frame part 10 through a vacuum suction force generated by a vacuum pump (not shown). That is, as a hollow part is formed inside the frame part 10, a case may occur in which the surface of the frame part 10 is concavely entered toward the hollow part during the welding process.

Therefore, when welding the frame part 10 using the welding device 100, the end of the frame part 10 is sucked through the vacuum suction port 117, so that the surface of the frame part 10 is welded while maintaining a flat state. can make this happen.

In this case, in the present invention, an example of the case in which the vacuum suction port 117 is formed in both the upper and lower pressing pieces 111 and 112 has been illustrated and described, but the present invention is not limited thereto, and the bottom surface in which the frame portion 10 has a wide area. It may be formed to be limited to the lower pressing piece 112 on which the (inside side) is seated.

Referring to FIG. 9 , the heating plate 120 is installed between a pair of frame parts 10 fixed by left and right clamps 110 to be inputted or discharged through the operation of an actuator 120a, and the frame part 10 ) is heated and melted.

Referring to FIG. 10 , the heating plate 120 includes a concave-convex portion 121 that forms a concave-convex surface 21 on a cut end surface of the opposite frame portion 10, and a flat surface 23 on at least an indoor edge of the cut surface. ) to form a flat portion 123 is provided.

In this case, the concave-convex portion 121 may be formed in an intaglio. When the concave-convex portion 121 is formed in a concave shape, the flat surface 23 can be sufficiently heated and melted to increase welding strength compared to a case in which the concave-convex portion 121 is formed in an embossed shape.

That is, as the concave-convex portion 121 is formed in a concave shape, the flat portion 123 first comes into contact with the edge of the cut surface of the frame portion 10 during heating and melting using the heating plate 120 (see FIG. 4 ).

Accordingly, the flat surface 23 is first sufficiently heated and melted on the cut surface of the frame portion 10 and then the concave-convex surface 21 is melted to form the edge of the frame portion 10 on which the flat surface 23 is formed. It can be welded more firmly.

In this case, the concave-convex frame of the concave-convex portion 121 smoothly smoothes the depth (0.5 to 2.0 mm or 1.0 to 1.5 mm) of the concave-convex frame D of the concave-convex surface 21 that is melt-formed at the end of the frame unit 10 . It is formed to a corresponding depth (0.5 to 2.0mm or 1.0 to 1.5mm) so that it can be formed.

In addition, the concave-convex portions 121 formed on both surfaces of the heating plate 120 are formed so that the concave-convex surfaces 21 opposite to the cut surface of the frame unit 10 can be alternately bonded to each other.

In addition, the surface of the heating plate 120 in contact with the cut surface of the frame portion 10 is treated with Teflon coating. Therefore, it is possible to prevent the synthetic resin, which is a material of the frame part 10 , from sticking to the heating plate 120 when the end of the frame part 10 is heated and melted using the heating plate 120 .

11 and 12, the end cut surface of the frame part 10 is heated and melted through the heating plate 120 having the above structure, and at the same time, on the opposite surface of the upper and lower pressing pieces 111 and 112. The integrally formed blade 113 removes the burr 20a that is pushed out through the cut surface.

And after the heating plate 120 is discharged from between the pair of frame parts 10, by moving the left and right clamps 110 toward the cut surface of the opposite frame part 10, formed at the end of the frame part 10 The concave-convex surface 21 and the flat surface 23 are bonded to each other (see FIG. 12 ).

In this case, the blade 113 may be made elastic by the spring 114 . In this case, even if the ends of the blades 113 formed to be opposed to each other collide with each other, the blades 113 can absorb shock as they are elastically supported by the springs 114, thereby preventing the blades 113 from being damaged. can

In addition, a stopper 115 protruding downward may be coupled to the bottom surface of the lower pressing piece 112 . And the lower end of the heating plate 120 is coupled to a stopper 115 and a gap maintaining block 125 of a constant width, the gap between the blades 113 provided in the upper and lower pressing pieces 111 and 112, respectively. can be kept constant (see FIG. 11).

In this case, the stopper 115 may be formed to be movable and fixed in the lateral direction. Therefore, when removing the burr 20a of the welding part 20 using the blade 113, the distance between the blades 113 installed in the upper and lower pressing pieces 111 and 112 is increased by adjusting the position of the stopper 115. It can be adjusted to correspond to the thickness of the heating plate 120 .

In this case, the stopper 115 may be moved in the lateral direction by sliding along a guide rail or a guide groove (not shown), and may be fixed by a fixing member (not shown) such as a bolt.

Referring to FIG. 13 , the decorative layer 11 is stacked on at least the indoor side surface of the frame unit 10 . Therefore, when the frame portion 10 is welded through the seamless welding device 100 , the decorative layer 11 has a seam width b in the welding portion 20 of 0.01 to 0.20 mm or 0.01 to 0.10 mm. (see Fig. 13(b)).

That is, when the seam width b of the decorative layer 11 is less than the above range, the decorative layers 11 stacked on the surface of the frame 10 may interfere with each other when the weld 20 is formed.

Conversely, when the width b of the seam of the decorative layer 11 exceeds the above range, the white color of the frame portion 10 may be exposed to the outside.

As such, the present invention can prevent the decorative layer 11 laminated on the surface of the frame part 10 from being removed during welding of the frame part 10 using the seamless welding apparatus 100, and thus the frame part 10 ) It can prevent the natural color white from being exposed to the outside.

Specifically, as shown in Fig. 13 (a), the conventional synthetic resin welding apparatus for windows and doors uses a finishing machine (T) for the burr (B) formed in the welding part during thermal welding of the frame part (P) on which the decorative layer (S) is laminated. ) to remove it by scraping.

At this time, the mapper T removes the burr B and at the same time removes the decorative layer S protruding by the burr B on the surface of the frame portion P. Accordingly, the frame portion is attached to the welding line. By exposing the white color of (P) to the outside, it may cause deterioration of the appearance quality of the product.

On the other hand, the seamless welding apparatus 100 of the present invention as shown in FIG. 13 (b) is provided on the opposite surface of the left and right clamps 110 during thermal welding of the frame portion 10 on which the decorative layer 11 is laminated. As the blade 113 moves in the lateral direction to remove the burr 20a formed on the weld 20, it prevents the decorative layer 11 protruding by the burr 20a from being removed together. can

That is, the blade 113 removes the burr 20a formed on the welding part 20 , and pushes the end of the decorative layer 11 laminated on the surface of the frame part 10 toward the welding line to make it flat. Accordingly, by preventing the white color of the frame part 10 from being exposed to the outside in the welding line of the welding part 20 , the appearance quality of the product can be improved.

14, the window frame seamless welding apparatus 100 according to the present invention having the structure as described above is disposed at four points on the main frame 200, respectively, so that welding of the four corners of the frame part 10 is possible at the same time .

In this case, the stage 210 on which the window frame seamless welding device 100 is installed is installed to be slidably movable in the X and Y axis directions along the guide rail 220, so it is easy to use window frames or windows of various sizes. can be produced

Then, an embodiment of the manufacturing process of the synthetic resin profile product 1 for windows and doors using the seamless welding apparatus 100 will be described.

First, the four frame parts 10 are disposed on the upper surface of the lower pressing piece 112 of the left and right clamps 110 in a rectangular frame shape (see FIG. 6 ).

When the four frame parts 10 are fixed by the lowering operation of the upper pressing piece 111 , the heating plate 120 is put into the space between the corners of the frame part 10 .

Then, while the left and right clamps 110 are moved toward the heating plate 120 interposed therebetween, the cut surface of the frame part 10 is heated and melted through contact with the heating plate 120 (see FIG. 9 ).

In this case, the concave-convex surface 21 is formed on the opposite cut surface of the frame part 10 , and the flat surface 23 is formed at least at the edge of the cut surface in contact with the indoor side surface 10a.

At the same time, the blade 113 integrally provided with the left and right clamps 110 melts at the end of the frame portion 10 to remove the burrs 20a protruding outward (see FIG. 11 ).

When the concave-convex surface 21 and the flat surface 23 are formed on the cut surface of the frame part 10, the heating plate 120 is discharged from between the left and right clamps 110, and the left and right clamps 110 are moved toward the opposite surface of the cut surface. If the cut surfaces are joined together by moving (see FIG. 12), the synthetic resin profile product 1 for windows and doors in the form of a square frame according to the present invention is completed.

Hereinafter, in order to help the understanding of the present invention, it will be described in detail together with Examples and Comparative Examples. However, it is obvious to those skilled in the art that various changes and modifications are possible within the scope and spirit of the present invention only by exemplifying the present invention, and it is natural that such changes and modifications belong to the appended claims.

[ Example and comparative example ]

1. Examples

(1) Example 1

The four frame parts 10 having the specifications of FIG. 15A and Table 1 below are arranged and fixed in the form of a square frame to the left and right clamps 110 of the seamless welding apparatus 100 of FIG. 6 , and each corner of the frame part 10 A concave-convex heating plate 120 having a depth of 1.5 mm of the concave-convex frame D is inserted between the ends of the part, and the concave-convex surface 21 having a depth of 1.5 mm in the concave-convex frame D on the end cut surface of the frame part 10 After melting and forming, the concave-convex surfaces 21 of the frame portion 10 were joined to each other to prepare a profile product 1 for windows and doors having a welded portion 20 .

No Dimensions (mm) sign Thickness (mm) A 42.0 △ 0.8 B 56.5 * 1.0 C 73.0 X 1.2 D 7.4 ○ 1.5 E 7.0 # 1.8 F 17.0 unmarked part 2.0 G 26.0 H 4.4 I 7.2 J 3.0

(2) Example 2

A profile product (1) for windows and doors was manufactured in the same manner as in Example 1, except that four frame parts having the specifications of FIG. 15B and Table 2 below were used as compared with Example 1.

No Dimensions (mm) sign Thickness (mm) A 87.0 * 1.0 B 70.5 X 1.2 C 42.0 ○ 1.5 D 17.0 △ 1.8 E 4.4 unmarked part 2.0 F 7.4 G 3.0 H 7.2 I 8.0

2. Comparative Example

(1) Comparative Example 1

In a general welding device (Hansung Machinery, TWL welding machine) that is not a seamless welding device, the four frame parts of the specifications of FIG. 15A and Table 1 are arranged and fixed in the form of a square frame, and a flat heating plate is installed between the ends of each corner of the frame part. A synthetic resin profile product for windows and doors is manufactured in such a way that a flat surface is melted on the cut surface of the end of the frame part by input, and then the flat surface of the frame part is bonded to each other, and the burr protruding between the cut surfaces is removed using a finishing machine. did.

(1) Comparative Example 2

A profile product (1) for windows and doors was manufactured in the same manner as in Comparative Example 1, except that four frame parts having the specifications of FIG. 15B and Table 2 were used.

3. Reference example

(1) Reference Example 1

In the same manner as in Example 1, except that the depth of the concave-convex frame D of the concavo-convex surface 23 was 0.3 mm by using the concave-convex heating plate 120 having a depth of 0.3 mm of the concave-convex frame D compared to Example 1 A profile product (1) for windows and doors was prepared.

(2) Reference Example 2

In the same manner as in Example 1, except that the depth of the concave-convex frame D of the concavo-convex surface 23 is 2.5 mm by using the concave-convex heating plate 120 having the depth of the concave-convex frame D of 2.5 mm compared with Example 1 A profile product (1) for windows and doors was prepared.

[ Experimental example ]

1. Weld strength

The welding strength of the profile products for windows and doors of Examples, Comparative Examples and Reference Examples was measured.

Specifically, as shown in Figure 16a, the four corners of the profile product for windows were cut leaving 283 mm to prepare a specimen, and then, using a UTM (Universal Testing Machine) (manufacturer, model name), a pressure of 50 mm/min was applied to each corner with a cross head. The maximum value at which fracture occurs after being applied to the welding site of the was measured (see Fig. 16b). The welding strength results and the welding strength improvement rate are shown in Table 3 below.

The improvement rate of the welding strength was calculated by the following [Equation 1].

[Equation 1]

[(X-Y) × 100]/Y

X: Welding strength of the weld including the uneven surface (kgf/cm2)

Y: Welding strength (kgf/cm2) of the welding part not including the uneven surface

[Equation 1] is a comparison of the welding strength of profile products for windows and doors of the same standard, Example 1, Reference Examples 1, 2 and Comparative Example 1 have the same product dimensions, and Example 2 and Comparative Example 2 Product dimensions are the same.

corner number Welding strength (kgf/㎠) Depth of concave-convex frame (D) (mm) Weld strength improvement rate (%) Example 1 One 210 1.0 40 2 225 1.0 52.03 3 211 1.0 45.52 4 206 1.0 32.90 Average 213 1.0 42.61 Example 2 One 365 1.5 46 2 364 1.5 37.36 3 340 1.5 25.93 4 334 1.5 14.78 Average 350 1.5 31.02 Comparative Example 1 One 150 - - 2 148 - - 3 145 - - 4 155 - - Average 150 - - Comparative Example 2 One 250 - - 2 265 - - 3 270 - - 4 291 - - Average 269 - - Reference Example 1 One 155 0.3 3.33 2 160 0.3 8.11 3 150 0.3 3.45 4 147 0.3 -5.16 Average 153 0.3 2.43 Reference Example 2 One 220 2.5 46.67 2 230 2.5 55.41 3 250 2.5 72.41 4 240 2.5 54.84 Average 235 2.5 57.33

2. Weld seam exposed area

The width of the seam of the decorative layer exposed to the welding part of Examples, Comparative Examples and Reference Examples was measured using a ruler, and the results are shown in Table 4 below.

corner number Seam width (mm) Example 1 One 0.010 2 0.024 3 0.019 4 0.018 Average 0.018 Example 2 One 0.082 2 0.051 3 0.034 4 0.056 Average 0.056 Comparative Example 1 One 0.40 2 0.40 3 0.45 4 0.43 Average 0.42 Comparative Example 2 One 0.50 2 0.60 3 0.40 4 0.55 Average 0.51 Reference Example 1 One 0.031 2 0.022 3 0.024 4 0.026 Average 0.026 Reference Example 2 One 0.046 2 0.069 3 0.072 4 0.062 Average 0.062

As can be seen in Table 3 above, the synthetic resin profile products 1 for windows and doors provided with the uneven surfaces 21 of Examples 1 and 2 are Comparative Examples 1 and 2, which are synthetic resin profile products for windows and doors in which the conventional cut surface is formed in a flat shape. It can be seen that the welding strength was improved by about 43% and 31%, respectively.

In addition, as shown in Table 4, the synthetic resin profile products for windows and doors of Examples 1 and 2 were manufactured using a seamless welding device to produce a synthetic resin profile product for windows and doors, so compared to Comparative Examples 1 and 2, a white line at the seam of the welded part Since it was hardly exposed, the appearance quality was very good.

On the other hand, in the case of Reference Example 1 in which the depth of the concave-convex frame D of the concave-convex surface 21 is smaller than in Example 1, the effect of improving the welding strength is insignificant, and the depth of the concave-convex frame D of the concave-convex surface 21 is large. In the case of Reference Example 2, there was a problem in that the dimensions of the window profile product including the frame part were changed after welding.

1: Synthetic resin profile product for windows and doors 10: Frame part
11: decorative layer 20: welding part
20a: burr 21: uneven surface
23: flat surface 25: auxiliary welding surface
25a: internal burr 100: seamless welding device
110: left and right clamp 111: upper pressing piece
112: lower pressing piece 113: blade
113a: vertical plane 113b: inclined plane
114: spring 115: stopper
117: vacuum inlet 120: heating plate
121: uneven part 123: flat part
125: spacing block 200: main frame
210: stage 220: guide rail
D : Concave-convex frame R : Rail

Claims (14)

The upper and lower pressing pieces 111 and 112 having a blade 113 formed on each side are provided to fix the frame portion 10 made of synthetic resin, respectively, and installed to be reciprocally movable in the lateral direction along the rail (R). left and right clamps 110; and
A heating plate 120 provided with a concave-convex portion 121 that is installed between a pair of frame portions 10 fixed by the left and right clamps 110 so as to be input or discharged, and includes;
When the left and right clamps 110 are moved, the ends of the pair of frame parts 10 come into contact with the input heating plate 120 to form the concave-convex surfaces 21 at the ends of the frame parts 10 to face each other and at the same time, the blade (113) cuts the burr (20a) pushed out of the end of the frame portion (10),
After the heating plate 120 is discharged, the concave-convex surface 21 formed at the end of the frame part 10 is mutually joined,
The blade 113 is a window frame seamless welding device further comprising a spring 114 elastically supported.
According to claim 1,
The left and right clamps 110,
A window frame seamless welding device that is installed to be reciprocally movable along the rail (R) by the forward and backward operation of the actuator (110a).
According to claim 1,
The upper pressing piece 111 is,
A window and door frame seamless welding device that is installed to be movable up and down by the operation of the actuator (111a) to press and fix the upper surface of the frame part (10) mounted on the upper surface of the lower pressing piece (112).
According to claim 1,
The blade 113 is,
A window frame seamless welding device that is formed to be opposite to each other on the upper end of the opposite surface of the upper pressing piece 111 and the opposite surface of the lower pressing piece 112.
delete According to claim 1,
The blade 113 is,
vertical plane (113a); and
A window frame seamless welding device comprising a; inclined surface (113b) formed to be inclined 15 to 50 ° toward the burr (20a) of the welding portion (20) in the vertical surface (113a) (113a).
According to claim 1,
A stopper 115 protruding downward is coupled to the bottom surface of the lower pressing piece 112,
A gap maintaining block 125 of a certain width in contact with the stopper 115 is coupled to the bottom surface of the heating plate 120 so that the gap between the blade 113 between the upper pressing piece 111 and the lower pressing piece 112 is Window frame seamless welding device further comprising a thing to be kept constant.
8. The method of claim 7,
The stopper 115 is
A seamless welding device for a window frame that is coupled to be movable and fixed in the transverse direction.
According to claim 1,
The heating plate 120 is
a concave-convex portion 121 for forming a concave-convex surface 21 on an end cut surface of the frame portion 10; and
A window frame seamless welding device comprising a; flat portion 123 for forming a flat surface 23 on at least the inner edge of the cut surface.
10. The method of claim 9,
The concave-convex portion 121 is
A seamless welding device for window frames that is formed by intaglio.
10. The method of claim 9,
The concave-convex frame of the concave-convex portion 121 is,
A window frame seamless welding device that is formed to a depth of 0.5 to 2.0 mm.
10. The method of claim 9,
The concave-convex frame of the concave-convex portion 121 is,
A window frame seamless welding device of any one of a square, polygonal or hemispherical shape.
According to claim 1,
The heating plate 120 is
A window frame seamless welding device that is operated by the forward and backward of the actuator (120a).
According to claim 1,
The surface of the heating plate 120 is,
A seamless welding device for window frames that is Teflon coated.

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