KR20200096074A - A synthetic resin profile for window - Google Patents

Abstract

The present invention relates to a synthetic resin profile product, which is used as a window and, more specifically, to a synthetic resin profile product for a window, in which a size of a welding line of the synthetic resin profile product for a window manufactured by welding a synthetic resin profile is minimized and a decorative sheet attached to a surface of a synthetic resin profile main body is rigidly maintained after welding.

Description

A synthetic resin profile for window}

The present invention relates to a synthetic resin profile product used as a window, and more specifically, the size of a welding line of a synthetic resin profile product for windows and doors manufactured by welding a synthetic resin profile is minimized, and a decorative sheet attached to the surface of the synthetic resin profile body after welding. It relates to a synthetic resin profile product for windows and doors that can be maintained firmly.

Generally, the window is composed of a window frame installed in an opening of a building and a window frame coupled to it, and is divided into a casement, a sliding door, etc. according to the opening and closing method, and is classified into a wooden window, a synthetic resin window, and a metal window according to the material.

Among them, the window frame and the window frame of the synthetic resin window are formed in a rectangular frame shape by the combination between the synthetic resin profiles P (see FIG. 1).

In this case, as an example, the synthetic resin profile product 1 may be in a state where a decorative sheet S is attached to the surface of the synthetic resin profile body P, which is usually extruded from a PVC resin composition, and each synthetic resin profile body P After the ends are cut in a diagonal shape of approximately 45°, the ends are welded to each other to form a welded portion 20 to form a window frame and/or window frame in the form of a square frame (see FIGS. 1 and 2).

At this time, the welding between the synthetic resin profiles is made by a synthetic resin profile welding apparatus for windows and doors disclosed through Korean Patent Registration No. 10-1364023 (Publication Date: 2014.02.18.).

Specifically, the synthetic resin profile welding apparatus for windows and doors fixes the synthetic resin profiles whose ends are cut diagonally to clamps.

Then, after the heating plate is inserted between the fixed synthetic resin profiles, the ends of the synthetic resin profiles facing each other are heated and melted by contacting the synthetic resin profile with the heating plate, thereby forming molten regions.

Then, before the molten parts are hardened, they are pressed together to perform welding between the synthetic resin profiles, and burs generated in the molten areas during this compression process are removed by hand or using a separate device such as a finishing machine.

Since the conventional profile product for windows and doors manufactured in this way removes the burrs (B) after welding, the burrs (B) generated at the time of heating and melting the synthetic resin profile with the heating plate are interfered with during welding between the synthetic resin profile bodies (P). As the welding surface becomes poor and the burr (B) protrudes out of the decorative sheet (S), the welding line (L) still having a large width and height even after removing the burr (B) with a separate chisel (T) or finishing machine ) Is exposed to the surface of the product, there is a problem that the aesthetic sense is greatly reduced. Because the welding line (L) has the color of the synthetic resin profile body (for example, white), the product appearance quality is greatly reduced due to the white welding line exposed between the decorative sheets.

In addition, while the remaining burrs (B') protruded to the surface of the decorative sheet (S), there was a problem in that the attachment state between the decorative sheet (S) and the synthetic resin profile body (P) was poor (see FIG. 2).

Republic of Korea Registered Patent No. 10-1364023 (Announcement date: 2014.02.18.)

The present invention has been devised to solve the above-mentioned problems, in order to minimize the size of the welding line formed on the surface of the welding part in the process of welding the ends of the synthetic resin profile to each other, to make use of the beauty of the product appearance, and the decorative sheet is a synthetic resin profile. It is an object of the present invention to provide a synthetic resin profile product for windows and doors to effectively solve problems such as being lifted or peeled from the main body.

The technical problems to be solved by the present invention need not be limited to the above-mentioned technical problems, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description. Will be able to.

Synthetic resin profile products for windows and doors according to the present invention for implementing the above object,

A synthetic resin profile product for windows and doors comprising a synthetic resin profile welded through a weld, wherein the synthetic resin profile includes a body and a decorative sheet attached to the surface of the body,

At least one end of the decorative sheet is configured to be inserted into the body.

The synthetic resin profile product for windows and doors according to the present invention removes burrs in the process of melting the ends of the synthetic resin profiles with a heating plate, so that the occurrence of burrs is minimized when welding the ends of the synthetic resin profiles after the heating plate is removed, thereby decorating sheets in the welding process. The synthetic resin profile can be rolled into the body to minimize the size of the welding line protruding from the surface of the welding part to make the appearance beautiful and to effectively prevent the decorative sheet from being lifted or peeled from the synthetic resin profile body. It works.

In addition, since the effects of the present invention described above are naturally exerted by the composition of the contents regardless of whether the inventor recognizes them or not, the above-described effects are only a few effects according to the contents described, and all effects identified or existed by the inventor. It should not be admitted that it is written.

In addition, the effects of the present invention will have to be further understood by the overall description of the specification, even if it is not described in an explicit sentence, those skilled in the art to which the described content belongs may have such an effect through this specification. If it can be recognized as an effect, it should be regarded as the effect described in this specification.

1 is an elevational view of a conventional synthetic resin profile product for windows and doors.
2 is a view showing a conventional welding process.
FIG. 3 is a photograph for drawing taken by magnifying a section of a welded part of a synthetic resin profile product for windows and doors of Comparative Example 1 by 100 times enlarged with an optical microscope (OM).
4 is a photograph of a cross section of a welding part of a synthetic resin profile product for windows and doors of Comparative Example 1 by magnifying 50 times (a), 100 times (b), 125 times (c) and 200 times (d) with a SEM (Scanning Electron Microscope). This is a picture instead of one drawing.
FIG. 5 is a picture for a drawing taken by 50 times (a) and a confocal laser scanning microscope (CLSM) (b) of the conventional synthetic resin profile welded portion of the synthetic resin profile product for windows and doors of Comparative Example 1.
6 is a perspective view of an embodiment of a welding device (hereinafter referred to as a “seamless welding device”) for manufacturing a synthetic resin profile product for windows and doors of the present invention.
7 is a view showing a blade according to an embodiment of the seamless welding apparatus of FIG.
8 is a cross-sectional view showing the vacuum suction ports of the left and right clamps according to an embodiment of the seamless welding apparatus of FIG. 6.
9 is a plan view showing an operating state of a heating plate according to an embodiment of the seamless welding apparatus of FIG. 6.
10 is a perspective view of a heating plate according to an embodiment of the seamless welding apparatus of FIG. 6.
11 and 12 are views showing an operating state of the seamless welding apparatus of FIG. 6 according to an embodiment.
13 is a view comparing the welding process according to the conventional (a) and the present invention (b).
14A and 14B are views showing a process of heating and melting an end of a synthetic resin profile using a heating plate according to an embodiment of the seamless welding apparatus of FIG. 6 and then bonding them.
FIG. 15 is a photograph for comparison by photographing a cross section of a welded portion of Example 1 of a synthetic resin profile product for windows and doors of the present invention at 50 times (a), 100 times (b), and 200 times (c) magnifications for comparison.
FIG. 16 is a photograph of the surface of the welded part of the synthetic resin profile of Example 1 of the synthetic resin profile product for windows and doors of the present invention taken by 100 times (a) and CLSM (b) as OM.
FIG. 17 is a photograph for a drawing showing a cross section of a welded portion of Example 1 of a synthetic resin profile product for windows and doors of the present invention through OM (a) and EDS (Energy Dispersive X-Ray Spectrometer) (b, c) analysis.

Hereinafter, the configuration and operation according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

This is for explaining in detail enough that a person of ordinary skill in the art to which the present invention pertains can easily implement the contents of the present invention, and this does not mean that the technical spirit and scope of the present invention are limited. .

In addition, in adding reference numerals to the components of each drawing, it should be noted that the same components are denoted by the same reference numerals as much as possible even though they are displayed on different drawings, and considering the configuration and operation of the present invention Therefore, the terms defined in particular may vary according to the intention or custom of the user or operator, and the definitions of these terms should be determined based on the contents throughout the specification.

First, the synthetic resin profile product for windows and doors according to the present invention is a main outer frame of a window frame or window, and the synthetic resin profile constituting the synthetic resin profile product for windows and doors may include a body made of synthetic resin material and a decorative sheet attached to the body surface. have. The decorative sheet may be composed of a single layer or a plurality of layers, and may be, for example, a form in which a printing film is stacked on the base film, but is not limited thereto.

Alternatively, instead of attaching a decorative sheet to the surface of the body, a synthetic resin profile may be used in which the decorative layer is integrally formed on the surface of the body by coextruding the decorative layer together with the body.

Here, the decorative sheet or decorative layer may be formed on any one or more surfaces of the main body of various formations, and may be formed, for example, in a form surrounding the indoor side.

The ends of each synthetic resin profile are cut in diagonal lines of approximately 45° so that the four profiles for windows and doors formed can be connected in the form of a square frame, and the ends of the cut synthetic resin profiles are welded through a synthetic resin profile welding device for windows and doors. It is made of synthetic resin profile products for windows and doors in the form of a welded medium.

Hereinafter, the characteristics of the synthetic resin profile product for windows and doors of the present invention will be described in detail.

FIG. 15 is a photograph of a cross section of a welded part of a synthetic resin profile product for windows and doors according to an embodiment of the present invention, taken with an SEM. Including a synthetic resin profile 10, wherein the synthetic resin profile 10 includes a main body 310, 320 and a decorative sheet 410, 420 attached to the surface of the main body 310, 320, and the decoration At least one end of the sheets 410 and 420 is inserted into the main body 310 and 320.

Alternatively, in the synthetic resin profile product for windows and doors according to the present invention, both ends of the decorative sheets 410 and 420 may be inserted into the main body 310 and 320.

In this case, in the synthetic resin profile product for windows and doors according to the present invention, the ends of the decorative sheets 410 and 420 may be inserted into the main body 310 and 320 at the same depth or at a different depth.

In addition, in the synthetic resin profile product for windows and doors according to the present invention, at least one end of the decorative sheets 410 and 420 has a depth of 0.01-0.5mm, 0.01-0.45mm from the top surface of the main body 310 and 320. It may be inserted into the depth of or 0.01-0.4mm.

In addition, the synthetic resin profile product for windows and doors according to the present invention has a width of 0.25 mm or less, 0.23 mm or less, or 0.20 mm or less, and a height of 0.15 mm or less, 0.13 mm or less, or 0.10 mm or less. I can.

In the art, a welding line is generated by welding, and refers to a seam of a substantially line shape in which a color (eg, white) of a synthetic resin profile body is exposed between decorative sheets.

The synthetic resin profile product for windows and doors of the present invention will be described in more detail with one embodiment of a seamless welding device 100 for manufacturing a synthetic resin profile product for windows and doors of the present invention.

6 is a perspective view of an embodiment of the seamless welding apparatus 100, the seamless welding apparatus 100 includes left and right clamps 110 and a heating plate 120.

First, the left and right clamps 110 are provided with upper and lower press pieces 111 and 112 with blades 113 formed on each surface to fix the synthetic resin profile 10 to be welded, respectively. It is installed to be able to reciprocate in the transverse direction along the rail R by the forward and reverse operation of the actuator 110a.

In this case, the upper pressing piece 111 is installed so as to reciprocate up and down by the operation of the actuator 111a, thereby pressing the upper surface of the synthetic resin profile 10 placed on the upper surface of the lower pressing piece 112 Can be fixed. At this time, the interior side 10a of the synthetic resin profile 10 is seated on the upper surface of the lower pressing piece 112.

In addition, the blades 113 are integrally formed on opposite surfaces of the upper and lower press pieces 111 and 112. The blade 113 is formed to face each other on the lower surface of the opposing surface of the upper pressing piece 111 and the upper surface of the opposing surface of the lower pressing piece 112.

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

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

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

Referring to FIG. 8, the upper and lower pressing pieces 111 and 112 may be provided with a vacuum suction port 117. The vacuum suction port 117 adsorbs the surface of the synthetic resin profile 10 seated through a vacuum suction input generated from a vacuum pump (not shown). That is, as the hollow portion is formed in the synthetic resin profile 10, a surface may be recessed toward the hollow portion in the welding process.

Therefore, when welding the synthetic resin profile 10 using the welding apparatus 100, the end of the synthetic resin profile 10 is adsorbed through the vacuum suction port 117 to weld the surface of the synthetic resin profile 10 in a flat state. This can be done.

In this case, in the present invention, an example of the case where the vacuum suction port 117 is formed on both the upper and lower press pieces 111 and 112 is illustrated and described, but is not limited thereto, and the bottom surface of the synthetic resin profile 10 is formed wide (Indoor side) may be formed to be limited to the lower pressure piece 112 is seated.

Referring to FIG. 9, the heating plate 120 is installed to be inserted or discharged through the operation of the actuator 120a between a pair of synthetic resin profiles 10 fixed by the left and right clamps 110, so that the synthetic resin profile 10 ) To heat-melt the end.

The heating plate 120 may have only a flat surface.

Alternatively, it may alternatively have a flat surface and an uneven surface as shown in FIG. 10.

Referring to FIG. 10, the heating plate 120 includes an uneven portion 121 forming an uneven surface 21 on an end cut surface of the opposing synthetic resin profile 10, and a flat surface 23 on at least the inside edge of the cut surface ) Is formed to form a flat portion (123).

In this case, the uneven portion 121 may be formed in an intaglio (see FIGS. 10 and 14). When the uneven portion 121 is formed in an intaglio, the flat surface 23 is sufficiently heated and melted to increase welding strength compared to a case in which the uneven portion 121 is formed in an intaglio. That is, as the uneven portion 121 is formed as an intaglio, the flat portion 123 first comes into contact with the edge of the cut surface of the synthetic resin profile 10 when heated and melted using the heating plate 120.

Accordingly, the flat surface 23 is first sufficiently heated and melted on the cut surface of the synthetic resin profile 10 and then the concave-convex surface 21 is melt-formed, thereby cutting the edge of the synthetic resin profile 10 on which the flat surface 23 is formed. It can be welded more firmly (see Fig. 11).

In this case, the uneven frame (D) of the uneven portion 121 is the depth (0.5 to 2.0 mm or 1.0 to 1.5 mm) of the uneven frame of the uneven surface 21 formed by melting at the end of the synthetic resin profile 10 It may be formed to a corresponding depth (0.5 to 2.0 mm or 1.0 to 1.5 mm) so that it can be formed smoothly.

In addition, the concavo-convex portions 121 formed on both surfaces of the heating plate 120 are formed so that the concave-convex surfaces 21 formed opposite to the cut surface of the synthetic resin profile 10 are alternately joined.

In addition, the surface of the heating plate 120 in contact with the cut surface of the synthetic resin profile 10 may be coated with Teflon. In this case, when the end of the synthetic resin profile 10 using the heating plate 120 is heated and melted, synthetic resin, which is a material of the synthetic resin profile 10, can be prevented from being pressed against the heating plate 120.

11 and 12, while melting the end cut surface of the synthetic resin profile 10 through the heating plate 120 having a flat surface or a flat surface and an uneven surface as described above, at the same time, the upper and lower press pieces 111 The blade 113 integrally formed on the opposite surface of 112 removes the burr 20a that is pushed out through the cutting surface.

And after the heating plate 120 is discharged from between the pair of synthetic resin profiles 10, by moving the left and right clamps 110 toward the cut surface of the opposite synthetic resin profile 10, formed at the end of the synthetic resin profile 10 The flat surface (not shown) or the uneven surface 21 and the flat surface 23 are joined to each other (see FIG. 12).

In this case, the blade 113 may be elastic by the spring 114. In this case, even if the tips of the blades 113 formed to face each other collide with each other, the blades 113 can absorb shock as they are elastically supported by the spring 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. In addition, a gap between the blades 113 provided on the upper and lower pressurizing pieces 111 and 112 is coupled to the bottom of the heating plate 120 by a gap maintaining block 125 having a constant width in contact with the stopper 115. This can be kept constant (see FIG. 11).

At this time, 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, by adjusting the position of the stopper 115, the gap between the blade 113 installed on the upper and lower pressing pieces 111 and 112 It can be adjusted to correspond to the thickness of the heating plate 120.

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

Synthetic resin profile 10 of one embodiment of the present invention as described above, the body 310, 320 surface, in a specific embodiment at least the interior side of the decorative sheet 410, 420 is attached to the state, the seamless When the synthetic resin profile 10 is welded through the welding device 100, the width of the welding line 500 in the welding part 20 may be 0.25 mm or less, 0.23 mm or less, or 0.20 mm or less when the synthetic resin profile for windows and doors is welded. The lower limit of the width is not particularly limited, and may be, for example, 0, 0.001mm or more, 0.005mm or more, or 0.01mm or more.

When the width of the welding line 500 is formed to be less than the above range, on the contrary, when the width of the welding line 500 of the decorative sheets 410 and 420 exceeds the above range, the main body 310 and 320 ) Of the color (for example, white) may be excessively exposed to the outside, which may deteriorate the appearance.

When the synthetic resin profile 10 is welded through the seamless welding apparatus 100, the decorative sheet 410, 420 has a height of the welding line 500 at the weld 20 of 0.15 mm or less, 0.13 mm or less, or 0.10 mm. It may be: The lower limit of the height is not particularly limited, but may be, for example, 0.001mm or more, 0.005mm or more, or 0.01mm or more.

When the height of the welding line 500 exceeds the above range, the color (for example, white) of the main body 310 and 320 is excessively exposed to the outside, reducing the appearance of the welding line 500. The part is easily contaminated by foreign substances, which can degrade the appearance quality of the product.

As described above, the synthetic resin profile product for windows and doors of the present invention is a decorative sheet 410, 420 attached to the surface of the body 310, 320 when welding the synthetic resin profile 10 using a seamless welding device 100. It is possible to prevent, and at least one end of the decorative sheet 410, 420 has a shape inserted into the main body 310, 320, so that the main color of the main body 310, 320 It can prevent (eg, white) from being exposed to the outside.

Specifically, as shown in (a) of FIG. 13, in the conventional welding method of a synthetic resin profile for windows and doors, a burr (B) formed on the welding portion by welding the main body P of the synthetic resin profile to which the decorative sheet (S) is attached is removed. After welding is completed, it is removed by scraping using a separate finishing machine (T).

If such a welding method is used, as the width or height of the welding line increases, it may be a cause of deteriorating the appearance quality of the product.

In contrast, in the case of the present invention, the left and right clamps 110 in the process of melting the ends of the synthetic resin profile 10 with the decorative sheets 410 and 420 attached to the heating plate 120, as shown in FIG. 13(b). By using the seamless seam welding apparatus 100 of the method of removing the burr 20a formed in the welding portion 20 while the blade 113 provided on the opposite surface of the transverse direction moves, the burr 20a It is possible to prevent the protruding decorative sheets 410 and 420 from being removed together.

That is, the blade 113 is to remove the burr (20a) formed in the welding portion 20, the end of the decorative sheet 410, 420 attached to the surface of the body 310, 320 of the synthetic resin profile welding line ( 500) while being pushed to the side, more specifically, the end of any one of the decorative sheets 410 and 420 is inserted into the body 310 and 320 (see FIG. 15). Accordingly, the color of the main body 310 and 320 of the synthetic resin profile may not be exposed to the welding line 500 of the welding part 20 to increase the appearance quality of the product.

The window frame seamless welding apparatus 100 according to the present invention having the above structure is disposed at each of four points on the main frame (not shown), so that the four corners of the synthetic resin profile 10 can be welded at the same time.

In this case, the stage on which the window frame seamless welding device 100 is installed is installed to be slidable in the X and Y axis directions along the guide rail, so that window frames or sash of various sizes can be easily manufactured.

The manufacturing process of the synthetic resin profile product for windows and doors of the present invention using such a seamless welding apparatus 100 will be described in detail.

First, four synthetic resin profiles 10 are arranged in a square frame shape on the upper surface of the lower pressing piece 112 of the left and right clamps 110 (see FIG. 6 ).

When the four synthetic resin profiles 10 are fixed by the lowering operation of the upper pressing piece 111, the heating plate 120 is put into the spaced space between the corners of the four synthetic resin profiles 10.

Then, while the left and right clamps 110 are moved toward the heating plate 120 interposed therebetween, the cut surfaces of the dog synthetic resin profiles 10 are heated and melted through contact with the heating plate 120 (see FIG. 9).

When a planar heating plate is used as the heating plate 120, only a flat surface (not shown) is formed on the cut surfaces of the four synthetic resin profiles 10 opposed to each other, and when the concave-convex heating plate 120 is used as the heating plate 120, the opposite four synthetic resin profiles are used. An uneven surface 21 is formed on the cutting surface of (10), and optionally, a flat surface 23 may be formed on at least an edge of the cutting surface contacting the indoor side surface 10a.

At the same time, the blades 113 integrally provided with the left and right clamps 110 are melted at the ends of the four synthetic resin profiles 10 to remove the burrs 20a that are pushed outward (see FIG. 11).

When the flat surface (not shown) or the uneven surface 21 and the flat surface 23 are formed on the cut surface of the synthetic resin profile 10, the heating plate 120 is discharged from between the left and right clamps 110, and the left and right clamps 110 When moving to the opposite surface of the cutting surface to join the cutting surface to each other (see Fig. 12), a synthetic resin profile product for a window frame in the shape of a square frame according to the present invention is completed.

The cross-section of the welded part of the synthetic resin profile product for windows and doors of the present invention will be described in more detail with reference to FIGS. 15 and 16, which are exemplified drawings.

First, the synthetic resin profile 10 is composed of a main body 310 and 320 located below, a decorative sheet 410 and 420 attached thereto, and a synthetic resin profile adjacent to an end of the synthetic resin profile 10 ( As the end of 10) faces and is melt-bonded through a melting process, the welded portion 20 is formed.

During the forming process of the welding part 20, the main body 310, 320, and/or the decorative sheet 410, 420 undergo a melting process by a heating plate to cause physical properties to change. Looking at the enlarged OM and SEM, the ends of the bodies 310 and 320 are in a state where the crystal structure collapses through the melting process and settles toward the inner center, and is attached to the upper side of the bodies 310 and 320 The ends of the decorative sheets 410 and 420, which have been made, may also be settled together toward the ends of the main bodies 310 and 320 that are settled.

That is, at least one end of each of the decorative sheets 410 and 420 on both sides is settled and inserted between the subsided main bodies 310 and 320 constituting the welding surface 30 through the melting process.

Here, even though the ends of the synthetic resin profile 10 are melted at the same time and pressure through the heating plate 120, the melted results may not always be the same, so one side of the ends of the bodies 310 and 320 settled depending on the situation. Only the end of the decorative sheet 410 is submerged and inserted, and the end of the other decorative sheet 420 may be in a non-settling state, or both end portions of the decorative sheet 410 and 420 may be submerged and inserted. It might be.

In addition, even if both ends of the decorative sheets 410 and 420 are settled and inserted between both ends of the subsided main bodies 310 and 320, the inserted depth may be different, and depending on the situation, the inserted depth may be different. It may be the same.

The insertion length of at least one end of the decorative sheets 410 and 420 is a depth of 0.01-0.5mm, a depth of 0.01-0.45mm, or a depth of 0.01-0.4mm from the top surface of the main body 310,320. Can be inserted into. If the insertion length is less than the depth, the decorative sheet may be lifted or peeled from the synthetic resin profile body, and if it exceeds the above range, desired product dimensions cannot be manufactured as it is inserted more than necessary.

On the other hand, when referring to FIGS. 3 and 4, the conventional synthetic resin profile product for windows and doors of Comparative Example 1 still has a large width and height of the welding line L even after the burr B is removed, thereby causing the decorative sheet S There is a problem that it is easy to be lifted or peeled from the main body (P), and the welding line (L) part is easily contaminated by foreign substances, thereby deteriorating the appearance quality of the product.

Synthetic resin profile products for windows and doors of the present invention as described above, the end of the synthetic resin profile 10 is melted by the heating plate 120 and the burrs 20a generated in the melting process are immediately removed, and then the heating plate 120 ) In the removed state, as the ends of the synthetic resin profile 10 are welded to each other, the occurrence of additional burrs in the welding process is prevented and the size of the welding line 500 made on the surface of the welding portion 20 can be minimized. will be.

In addition, the ends of the main body 310 and 320, which were submerged in the melting process by the heating plate 120, and the ends of the decorative sheets 410 and 420 do not rise while forming burrs, and the decorative sheets 410 and 420 While the end of the body is inserted between the ends of the settled body 310, 320, and then cooled, the bonding force between the body 310, 320 and the decorative sheet 410, 420 is doubled as it cools. The decorative sheets 410 and 420 from 310 and 320 may be prevented from being lifted or peeled.

In the following, preferred embodiments are provided to help understanding of the present invention, but the following examples are only illustrative of the present invention, and it is apparent to those skilled in the art that various changes and modifications are possible within the scope and technical scope of the present invention. It is natural that such changes and modifications fall within the scope of the appended claims.

[ Example And Comparative example ]

1. Examples

(1) Example 1

Four profiles with decorative sheets attached to the surface of the main body made of PVC were fixed in the shape of a square frame to the left and right clamps provided with the upper and lower pressing pieces of the seamless welding apparatus 100 of FIG. 6.

Subsequently, a concave-convex heating plate having a temperature of 230-250°C was inserted between the ends of each corner of the profile, and the profile was contacted with the heating plate and pressed to melt for 24-29 seconds until the end of the profile was melted. . At this time, the burrs are generated and removed by the blades 113 provided on the upper and lower pressing pieces.

Then, after the heating plate was discharged and removed, the ends of the profiles were welded to each other by contacting the ends of the profiles through the left and right clamps.

Finally, by cooling the welded portion at room temperature, a synthetic resin profile product for windows and doors including the profile 10 welded through the welded portion 20 of Example 1 was manufactured.

(2) Example 2

In the same manner as in Example 1, a synthetic resin profile product for windows and doors including the profile 10 welded through the welding portion 20 of Example 2 was manufactured.

(3) Example 3

In the same manner as in Example 1, a synthetic resin profile product for windows and doors including the profile 10 welded through the welding portion 20 of Example 3 was manufactured.

2. Comparative Example

(1) Comparative Example 1

Four profiles with decorative sheets attached to the surface of the main body made of PVC were fixed in the form of a square frame to a general welding device (Hansung Machinery, TWL welding machine), not a seamless welding device.

Subsequently, a flat heating plate having a temperature of 260° C. was introduced between the ends of each edge portion of the profile, and then the profile was pressed against the heating plate and then pressed to melt the ends of the profile for 21-25 seconds.

Then, after the heating plate was discharged and removed, the ends of the profiles were welded to each other by contacting the ends of the profiles through the left and right clamps.

Finally, after cooling the welding portion at room temperature, a synthetic resin profile product for windows and doors including a profile joined through a welding portion of Comparative Example 1 was manufactured by removing burrs protruding between cutting surfaces using a finishing machine.

[ Experimental Example ]

1. SEM (Scanning Electron Microscope) photo

Cross-sections of the welded portions of the profile products for windows and doors of Examples 1-3 and Comparative Example 1 were photographed by varying magnification (mag) with a scanning electron microscope (manufacturer: Zeiss, model name: Merlin Compact name).

2. OM(Optical Microscope) Photo

Cross-sections of the welds of the profile products for windows and doors of Examples 1-3 and Comparative Example 1 were photographed with an optical microscope (manufacturer: Huvitz, model name: HRM-300).

3. CLSM (Confocal laser scanning microscope) photo

Cross-sections of the welds of the profile products for windows and doors of Examples 1-3 and Comparative Example 1 were photographed with a confocal laser scanning microscope (manufacturer: Huvitz, model name: HRM-300).

4. Width and height of welding line

The width and height of the welding line of the profile products for windows and doors of Examples 1-3 and Comparative Example 1 were analyzed using OM pictures and CLSM pictures.

At this time, after measuring the width and height three times for three different surface points of the welding line of each of the profile products for windows and doors, the average values are shown in Table 1.

5. Measurement of insertion depth and insertion of the end of the decorative sheet

It was confirmed whether the decorative sheet was inserted into the main body through the SEM photograph of the cross-section of the welded portion of the window and profile products of Example 1 and Comparative Example 1.

Also, if the decorative sheet was inserted into the main body, the depth of the inserted decorative sheet end was calculated and listed in Table 1.

At this time, based on the cross-sectional photograph, the decorative sheet located on the left side is referred to as a decorative sheet 1 and the decorative sheet located on the right side is referred to as a decorative sheet 2 in Table 1.

6. EDS (Energy Dispersive X-ray Spectroscopy) mapping analysis

An energy dispersion type spectrometer (manufacturer: Zeiss, model name: Merlin Compact) was used to analyze the components of the welding part of the profile product for windows and doors of Example 1.

Welding line Decoration sheet Insertion And insertion depth Width(mm) Height(mm) Decorative sheet 1 Decoration sheet 2 Example 1 0.127 0.028 Inserted (insertion depth: 0.225mm Inserted
(Insertion depth: 0.388mm) Example 2 0.080 0.042 Unmeasured Unmeasured Example 3 0.040 0.038 Unmeasured Unmeasured Comparative Example 1 0.223 0.201 Not inserted (extruded) Not inserted
(Extended)

As a result of analysis by OM pictures and CLSM pictures, the synthetic resin profile products for windows and doors of Examples 1 to 3 are small in width and height of the welding line, and unlike the synthetic resin profile products for windows and doors of Comparative Example 1, the white color of the body cannot be visually confirmed. It was confirmed that the level was insignificant.

In addition, as a result of analysis of SEM photographs and OM photographs, the synthetic resin profile products for windows and doors of Examples 1 to 3 have a decorative sheet end from the upper surface of the body unlike the synthetic resin profile products for windows and doors of Comparative Example 1 in which the end of the decorative sheet protrudes upward from the upper surface of the body. It was confirmed that it was inserted inside. Accordingly, it was confirmed that the synthetic resin profile products for windows and doors of Examples 1 to 3 had the effect of not lifting or peeling the decorative sheet from the main body.

In addition, as a result of analyzing the EDS mapping of the welding part of Example 1 separately, it can be seen that there is a welding line on the surface by detecting the Ca inorganic element which is the main component included in the PVC resin composition of the main body, but it is a level that cannot be visually confirmed. Could confirm.

As described above, in the detailed description of the present invention, specific embodiments have been described, but, of course, various modifications can be made without departing from the scope of the described content. Therefore, the scope of the described content is not limited to the described embodiments and does not need to be determined, and should be determined by the claims and equivalents as well as the claims to be described later.

10: synthetic resin profile 20: welding part
20a: burr 21: uneven surface
23: flat surface 30: welding surface
100: seamless welding device 110: left and right clamps
111: upper pressing piece 112: lower pressing piece
113: blade 113a: vertical surface
113b: slope 114: spring
115: stopper 117: vacuum inlet
120: heating plate 121: uneven portion
123: flat part 125: gap maintaining block
310,320: main body
410,420: decorative sheet 500: welding line

Claims (7)

A synthetic resin profile product for windows and doors including a synthetic resin profile 10 welded through a welding part 20,
The synthetic resin profile 10 includes a main body 310, 320 and a decorative sheet 410, 420 attached to the surface of the main body 310, 320,
At least one end of the decorative sheets 410 and 420 is inserted into the main body 310 and 320,
The welding part 20 is the body 310, 320 are welded,
The width of the welding line 500 of the welding part 20 is 0-0.25mm, and the height of the welding line 500 is 0-0.15mm. A synthetic resin profile product for windows and doors. The method of claim 1,
Synthetic resin profile products for windows and doors that the ends of the decorative sheets (410, 420) are all inserted into the body (310, 320). According to claim 2,
The end portions of the decorative sheets 410 and 420 are inserted into the body 310 and 320 at the same depth or at different depths, respectively. The method according to claim 1 or 2,
At least one end of the decorative sheet (410, 420) is inserted to a depth of 0.01-0.5mm from the upper surface of the main body (310, 320) is a synthetic resin profile product for windows. The method of claim 4,
At least one end of the decorative sheet (410, 420) is inserted to a depth of 0.01-0.4mm from the upper surface of the main body (310, 320), a synthetic resin profile product for windows. The method of claim 1,
The width of the welding line 500 of the welding part 20 is 0.001-0.25mm, and the height of the welding line 500 is 0.001-0.15mm. The method of claim 6,
The width of the welding line 500 of the welding part 20 is 0.01-0.20mm, and the height of the welding line 500 is 0.01-0.10mm. A synthetic resin profile product for windows and doors.

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