JP7146083B2 - Synthetic resin profile products for joinery - Google Patents

Description

The present invention relates to a synthetic resin profile product used for fittings, and more particularly, to a synthetic resin profile product for fittings manufactured by welding synthetic resin profiles, in which the size of the weld line is minimized and the , relates to a synthetic resin profile product for joinery in which a decorative sheet attached to the surface of a synthetic resin profile body can be firmly maintained.

In general, fittings consist of a window frame installed at the opening of a building and a shoji attached to it. , synthetic resin fittings, metal fittings, etc.
In general, fittings consist of a window frame installed at the opening of a building and a shoji attached to it. , synthetic resin fittings, metal fittings, etc.

Among these, the window frame and shoji of the synthetic resin fittings are formed into a quadrangular frame shape by coupling between the synthetic resin profiles P (see FIG. 1).

In this case, as an example, the synthetic resin profile product 1 can usually be in a state in which a decorative sheet S is attached to the surface of a synthetic resin profile body P extruded from a PVC resin composition, and each synthetic resin profile body After the ends of P are cut at a diagonal of about 45°, the ends are butted against each other and welded to form welds 20, thereby forming a square frame-shaped window frame and/or shoji. (See FIGS. 1 and 2).

At this time, the welding between the synthetic resin profiles is performed by a welding apparatus for synthetic resin profiles for fittings disclosed in Korean Patent No. 10-1364023 (publication date: 2014.02.18.). .

In particular, a welding device for synthetic resin profiles for fittings fixes synthetic resin profiles whose ends are cut diagonally, respectively, in clamps.

After the heating plate is inserted between the fixed synthetic resin profiles, the ends of the opposing synthetic resin profiles are heated and melted by the contact between the synthetic resin profile and the heating plate to form melted portions. be.

Then, the synthetic resin profiles are welded together by crimping each other before the melted parts harden. is removed using a separate device.

In the conventional fitting profile product manufactured in this way, the burr B is removed after welding. Interference occurs during welding between the parts, the state of the welded surface becomes poor, and the burr B protrudes outside the decorative sheet S. In addition, there is a problem that the welding line L having a large height is exposed on the surface of the product, and the appearance of the product is greatly deteriorated. Because the weld line L takes on the color of the synthetic resin profile body (for example, white), the white weld line exposed between the decorative sheets greatly reduces the appearance quality of the product.

In addition, there is a problem that the remaining burrs B' protrude from the surface of the decorative sheet S, resulting in a poor joint state between the decorative sheet S and the synthetic resin profile main body P (see FIG. 2).

Korea Registered Patent No. 10-1364023

SUMMARY OF THE INVENTION The present invention has been devised to solve the above-mentioned problems, and aims to minimize the size of the weld line formed on the surface of the weld during the process of welding the ends of synthetic resin profiles together. The purpose is to provide a synthetic resin profile product for fittings that effectively solves the problem of the decorative sheet floating or peeling off from the synthetic resin profile body by making the most of the beautiful appearance of the product. be.

The technical problems to be solved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned are based on the common knowledge in the technical field to which the present invention belongs from the following description. will be clearly understood by those who have

The synthetic resin profile product for joinery according to the present invention for realizing the above-mentioned objects is:
A synthetic resin profile product for fittings comprising a synthetic resin profile welded via a weld, wherein the weld line of said weld has a width of 0.001-0.25 mm and a height of 0.001-0. .15 mm.

In the synthetic resin profile product for fittings according to the present invention, burrs are removed in the process of melting the ends of the synthetic resin profile with a hot plate, so that burrs are removed when the ends of the synthetic resin profile are welded after the hot plate is removed. By minimizing the occurrence of the decorative sheet during the welding process, the decorative sheet is caught inside the synthetic resin profile body, minimizing the size of the weld line protruding from the surface of the weld, The appearance can be made beautiful, and there is the effect of effectively preventing the decorative sheet from floating or peeling off from the synthetic resin profile body.

It should be noted that the effects of the present invention described in this way are, of course, exhibited by the configuration of the described contents regardless of whether the inventors recognize them or not. It should not be deemed to describe all the effects that the inventor perceives or actually has.

In addition, the effect of the present invention must be additionally understood by the overall description of the specification, and even if it is not described in explicit sentences, ordinary knowledge in the technical field to which the described content belongs Any effect that can be recognized by a person having such effect through this specification should be considered as an effect described in this specification.

1 is an elevation view of a conventional joinery synthetic resin profile product; FIG. It is the figure which showed the conventional welding process. 4 is a drawing-substituting photograph of a cross-section of a welded portion of a synthetic resin profile product for fittings of Comparative Example 1, taken with an OM (Optical Microscope) at a magnification of 100 times. The cross section of the welded part of the synthetic resin profile product for fittings of Comparative Example 1 was photographed by SEM (Scanning Electron Microscope) at 50 times (a), 100 times (b), 125 times (c) and 200 times (d). It is a drawing substitute photograph. 2 is a drawing-substituting photograph of the surface of the welded portion of the conventional synthetic resin profile of the synthetic resin profile product for fittings of Comparative Example 1, taken with an OM of 50 times (a) and a CLSM (confocal laser scanning microscope) (b). BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of one embodiment of a welding device (hereinafter referred to as "seamless welding device") for manufacturing a synthetic resin profile product for fittings of the present invention; FIG. 7 illustrates a blade according to one embodiment of the seamless welding apparatus of FIG. 6; FIG. 7 is a cross-sectional view showing vacuum inlets of left and right clamps according to one embodiment of the seamless welding apparatus of FIG. 6; FIG. 7 is a plan view showing an operating state of a hot plate according to one embodiment of the seamless welding apparatus of FIG. 6; FIG. 7 is a perspective view of a hot plate according to one embodiment of the seamless welding apparatus of FIG. 6; FIG. 7 is a view showing an operating state according to one embodiment of the seamless welding device of FIG. 6; FIG. 7 is a view showing an operating state according to one embodiment of the seamless welding device of FIG. 6; It is the figure which compared the welding process by the conventional (a) and this invention (b). 7(a) and 7(b) are diagrams showing a process of heating and melting the ends of a synthetic resin profile using a hot plate according to an embodiment of the seamless welding apparatus of FIG. 6, and then joining them. The cross section of the welded portion of Example 1 of the synthetic resin profile product for fittings of the present invention was photographed by SEM at magnifications of 50 (a), 100 (b) and 200 (c), and shown for comparison. It is a drawing substitute photograph. 1 is a drawing-substituting photograph showing the surface of a welded portion of a synthetic resin profile of Example 1 of a synthetic resin profile product for joinery of the present invention, photographed at 100 times magnification with OM (a) and CLSM (b). 1 is a drawing-substituting photograph showing a cross section of a welded portion of Example 1 of a synthetic resin profile product for joinery of the present invention through OM (a) and EDS (Energy Dispersive X-Ray Spectrometer) (b, c) analysis.

Hereinafter, configurations and operations according to preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The purpose of this is to explain the details of the present invention to the extent that a person having ordinary knowledge in the technical field to which the present invention belongs can easily implement the contents of the present invention. It is not meant to be limited.

Also, in adding reference numerals to constituent elements in each drawing, it should be noted that the same constituent elements are indicated by the same reference numerals as much as possible even if they are displayed on other drawings. Terms specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intention or practice of the user, operator, and definitions for such terms are provided throughout the specification. It must be judged on its content.

First, the synthetic resin profile product for fittings according to the present invention is a main outer frame of a window frame or a shoji, and the synthetic resin profile constituting the synthetic resin profile product for fittings comprises a main body made of a synthetic resin material and a main body and a decorative sheet attached to the surface of the The decorative sheet may be composed of a single layer or multiple layers, and for example, may have a form in which a printed film is laminated on top of a base film, but is not necessarily limited thereto.

Alternatively, instead of adhering the decorative sheet to the surface of the main body, a synthetic resin profile in which the decorative layer is co-extruded with the main body so that the decorative layer is integrally formed on the surface of the main body can be used.

Here, the decorative sheet or the decorative layer may be formed on one or more surfaces of various shapes of the main body, and as a specific example, may be formed in a form that wraps the interior side surface.

Both ends of each synthetic resin profile are cut at a diagonal of about 45° so that the four fitting profiles thus formed can be connected in the form of a square frame, and the cut plural synthetic resin profiles are cut. By welding the ends through a welding device for a synthetic resin profile for fittings, a synthetic resin profile product for fittings is manufactured in the form of being welded via a weld.

The features of the synthetic resin profile product for fittings of the present invention are specifically described below.

FIG. 15 is a drawing-substitute photograph of a cross section of a welded portion of a synthetic resin profile product for fittings according to an embodiment of the present invention, taken with an SEM. The width of the weld line 500 of said weld 20 may be 0.25 mm or less, 0.23 mm or less, or 0.20 mm or less, and the height may be 0.15 mm or less, 0.13 mm or less, or 0.10 mm or less. At this time, the lower limit values of the width and height are not particularly limited. It may be 0.01 mm or more.

A weld line in the art means a substantially line-shaped seam generated by welding and exposing the color (for example, white) of the synthetic resin profile body between decorative sheets.

At this time, the synthetic resin profile 10 may be in a state in which decorative sheets 410 and 420 are attached to the surfaces of the main bodies 310 and 320, as a specific example, at least the interior side surfaces, as described above. but not limited to this.

If the width and height of the weld line 500 exceed the above range, the color (for example, white) of the main bodies 310 and 320 is excessively exposed to the outside, degrading the appearance of the weld. A portion of the line 500 can easily become contaminated with foreign matter, thereby degrading the appearance quality of the product.

In addition, the synthetic resin profile product for joinery of the present invention includes a plurality of synthetic resin profiles 10 welded via welds 20, and the synthetic resin profiles 10 are composed of main bodies 310, 320 and main bodies 310, 320. At least one end of the decorative sheets 410 and 420 is inserted into the main body 310 and 320 .

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

In this case, in the synthetic resin profile product for joinery according to the present invention, the ends of the decorative sheets 410 and 420 are inserted into the main bodies 310 and 320 at the same depth or different depths. may

Further, in the synthetic resin profile product for joinery according to the present invention, at least one end of the decorative sheets 410, 420 has a depth of 0.01 to 0.5 mm from the upper surface of the main body 310, 320. , a depth of 0.01-0.45 mm, or a depth of 0.01-0.4 mm.

The synthetic resin profile product for fittings of the present invention will be described more specifically together with an embodiment of the seamless welding apparatus 100 for manufacturing the synthetic resin profile product for fittings of the present invention as described above.

FIG. 6 is a perspective view of one embodiment of a seamless welding device 100, which includes left and right side clamps 110 and a heating plate 120. As shown in FIG.

First, the left and right side clamps 110 are provided with upper and lower pressing pieces 111 and 112 each having a blade 113 formed on one surface thereof, and fix the synthetic resin profiles 10 to be welded, respectively. The left and right clamps 110 are installed to reciprocate laterally along the rail R by forward and backward movement of the actuator 110a.

In this case, the upper pressing piece 111 is installed 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 synthetic resin profile 10 is placed on the upper surface of the lower pressure piece 112 so that the inner side surface 10a of the synthetic resin profile 10 abuts thereon.

A blade 113 is formed integrally with the facing surfaces of the upper and lower pressing pieces 111 and 112 . The blade 113 is formed at the lower end of the opposing surface of the upper pressing piece 111 and the upper end of the opposing surface of the lower pressing piece 112 so as to face each other.

Referring to FIG. 7, the tip of the blade 113 may be formed of a vertical surface 113a and an inclined surface 113b inclined at a predetermined angle θ from the vertical surface 113a toward the burr 20a of the welded portion 20. .

That is, the angle θ of the inclined surface 113b can be easily adjusted by the vertical surface 113a, so that 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 15-50° or 20-45°. If the angle θ of the inclined surface 113b is less than the above range, the tip of the blade 113 becomes sharper than necessary and may be easily damaged during repeated use. Conversely, if the angle θ of the inclined surface 113b exceeds the 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 sucks the surface of the placed synthetic resin profile 10 through a vacuum suction force generated by a vacuum pump (not shown). That is, since the synthetic resin profile 10 has a hollow inside, the surface of the synthetic resin profile 10 may be recessed toward the hollow during the welding process.

Therefore, when the synthetic resin profile 10 is welded using the seamless welding device 100, the end of the synthetic resin profile 10 is sucked through the vacuum suction port 117 so that the surface of the synthetic resin profile 10 is kept flat. Welding can be performed.

In this case, in the present invention, an example in which the vacuum suction port 117 is formed in both the upper and lower pressure pieces 111 and 112 is illustrated and described, but the present invention is not limited to this, and the synthetic resin profile 10 may be limited to the lower pressure piece 112 on which the bottom surface (interior side surface) formed with a large area is placed.

Referring to FIG. 9, a heating plate 120 is installed between a pair of synthetic resin profiles 10 fixed by left and right clamps 110 so as to be able to be input or discharged through the operation of an actuator 120a. is heated and melted.

The heating plate 120 may have only a flat surface.

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

Referring to FIG. 10, the heating plate 120 has an uneven portion 121 forming an uneven surface 21 on the end cut surface of the facing synthetic resin profile 10 and a flat surface 23 on at least the edge of the cut surface on the interior side. and a flat portion 123 forming.

In this case, the uneven part 121 may be formed as an intaglio (see FIGS. 10 and 14). When the concave and convex portions 121 are formed by intaglio, the welding strength can be increased by sufficiently heating and melting the flat surface 23 compared to the case where the concave and convex portions 121 are formed by embossing. That is, since the concave-convex portion 121 is formed in an indented shape, the flat portion 123 comes into first contact with the edge of the cut surface of the synthetic resin profile 10 when the heating plate 120 is used to heat and melt the synthetic resin profile 10 .

As a result, the flat surface 23 is sufficiently heated and melted on the cut surface of the synthetic resin profile 10 first, and then the uneven surface 21 is formed by melting. The parts can be welded more firmly (see FIG. 11).

In this case, the trough D of the rugged portion 121 is determined by the depth of the trough of the rugged surface 21 melt-formed at the end of the synthetic resin profile 10 (0.5 to 2.0 mm or 1.0 to 1.0 mm). 5 mm) can be formed to a corresponding depth (0.5-2.0 mm or 1.0-1.5 mm).

In addition, the uneven portions 121 formed on both sides of the heating plate 120 are formed so that the uneven surfaces 21 formed to face the cut surfaces of the synthetic resin profile 10 can be joined alternately.

Also, the surface of the heating plate 120 that contacts the cut surface of the synthetic resin profile 10 may be coated with Teflon (registered trademark). In this case, it is possible to prevent the synthetic resin, which is the material of the synthetic resin profile 10 , from seizing onto the heating plate 120 when the heating plate 120 is used to heat and melt the ends of the synthetic resin profile 10 .

11 and 12, the edge cut surface of the synthetic resin profile 10 is melted through the heating plate 120 having the flat surface or the flat surface and the uneven surface, and the upper and lower portions are pressed. A blade 113 integrally formed on the opposed surfaces of the pieces 111 and 112 removes the burr 20a pushed out through the cut surfaces.

After the heating plate 120 is ejected from between the pair of synthetic resin profiles 10, the left and right clamps 110 are moved toward the cut surfaces of the synthetic resin profiles 10 facing each other, thereby removing the synthetic resin profiles 10. The flat surface (not shown) formed at the end, or the uneven surface 21 and the flat surface 23 are joined together (see FIG. 12).

In this case, the blade 113 can be elastically supported by the spring 114 . In this case, even if the tips of the blades 113 formed to face each other collide, the blades 113 are elastically supported by the springs 114 to absorb the impact, thereby preventing the blades 113 from being damaged. can be prevented.

A stopper 115 projecting downward may be coupled to the bottom surface of the lower pressure piece 112 . In addition, a gap maintaining block 125 having a constant width that contacts with the stopper 115 is coupled to the lower end of the heating plate 120 so that the blades 113 provided on the upper and lower pressing pieces 111 and 112 are separated from each other. The spacing can be kept constant (see Figure 11).

At this time, the stopper 115 may be laterally movable and fixable. Therefore, when removing the burr 20a of the welded portion 20 using the blade 113, by adjusting the position of the stopper 115, the gap between the blades 113 installed on the upper and lower pressure pieces 111 and 112 can be increased. can be adjusted to correspond to the thickness of the

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

The synthetic resin profile product for fittings of the present invention prevents the decorative sheets 410, 420 attached to the surfaces of the main bodies 310, 320 from being removed when the synthetic resin profile 10 is welded using the seamless welding apparatus 100. At least one end of the decorative sheets 410 and 420 is inserted into the main body 310 and 320, thereby restoring the original shape of the main body 310 and 320. A color (eg, white) can be prevented from being exposed to the outside.

Specifically, as shown in FIG. 13(a), in the conventional method for welding a synthetic resin profile for fittings, a burr formed at the welded portion by welding a synthetic resin profile main body P to which a decorative sheet S is attached is removed. B is removed by scraping off using a separate finisher T after welding is completed.

When such a welding method is used, the width and height of the weld line L increase, which may cause deterioration in appearance quality of the product.

On the other hand, in the case of the present invention, as shown in FIG. A decorative sheet 410 protruded by the burr 20a is removed by using the seamless welding device 100 in which the burr 20a formed on the welded portion 20 is removed while the blade 113 provided on the facing surface of the 110 moves laterally. , 420 can be prevented from being removed together.

That is, while the blade 113 removes the burr 20a formed on the welded portion 20, it pushes the ends of the decorative sheets 410, 420 attached to the surfaces of the synthetic resin profile bodies 310, 320 toward the weld line 500. Flat, more specifically, one end of the decorative sheets 410 and 420 is inserted into the main body 310 and 320 (see FIG. 15). As a result, the color of the synthetic resin profile bodies 310 and 320 is not exposed to the outside at the weld line 500 of the welded portion 20, thereby improving the appearance quality of the product.

The fitting frame seamless welding apparatus 100 according to the present invention having the structure described above is arranged at four points on a main frame (not shown), thereby welding four corners of the synthetic resin profile 10. are possible at the same time.

In this case, the stage on which the fitting frame seamless welding apparatus 100 is installed is installed so as to be slidable along the guide rails in the X and Y axial directions, thereby facilitating the installation of various sizes of window frames or shoji. can be made.

A manufacturing process of the synthetic resin profile product for fittings of the present invention using such a seamless welding apparatus 100 will be specifically described.

First, four synthetic resin profiles 10 are arranged in the shape of a rectangular frame on the upper surfaces of the lower pressure pieces 112 of the left and right clamps 110 (see FIG. 6).

When the four synthetic resin profiles 10 are fixed by the downward movement of the upper pressing piece 111, the heating plate 120 is put into the space between the corners of the four synthetic resin profiles 10. As shown in FIG.

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

When a flat heating plate is used as the heating plate 120, only flat surfaces (not shown) are formed on the cut surfaces of the four synthetic resin profiles 10 facing each other, and when an uneven heating plate is used as the heating plate 120. , uneven surfaces 21 are formed on the cut surfaces of the four synthetic resin profiles 10 facing each other, and flat surfaces 23 can be formed selectively on at least edges of the cut surfaces that are in contact with the interior side surface 10a. .

At the same time, the blades 113 integrally provided with the left and right side clamps 110 remove the burrs 20a melted and pushed out from the ends of the four synthetic resin profiles 10 (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 ejected from between the left and right clamps 110, and the left and right clamps 110 is moved toward the opposite surface of the cut surface to join the cut surfaces together (see FIG. 12), the square frame-shaped synthetic resin profile product for joinery according to the present invention is completed.

The cross section of the welded portion of the synthetic resin profile product for fittings of the present invention will be described in more detail with reference to FIGS.

First, the synthetic resin profile 10 is constructed by placing the main bodies 310, 320 underneath and attaching the decorative sheets 410, 420 thereon. The ends of 10 face each other and are welded together through a melting process to form a welded portion 20 .

During the formation process of the welded part 20, the body 310, 320 and/or the decorative sheets 410, 420 are melted by a hot plate, and their physical properties change. When magnified by OM and SEM, in the case of the ends of the bodies 310 and 320, the crystal structure collapses through the melting process and sinks toward the inner center, and is attached to the upper side of the bodies 310 and 320. The end portions of the decorative sheets 410 and 420 can also be in a state of sinking together with the end portions of the sinking main bodies 310 and 320 .

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

Here, even if the ends of the synthetic resin profile 10 are melted at the same time and pressure through the hot plate 120, the melted result is not always the same, and depending on the situation, the two main bodies 310, 320, only one end of the decorative sheet 410 is sunken and inserted, and the other end of the decorative sheet 420 is not sunken, or the ends of both the decorative sheets 410 and 420 are either may also sink and become inserted.

In addition, even if both ends of the decorative sheets 410 and 420 are sunk and inserted between the ends of the sunken main bodies 310 and 320, there may be a difference in the depth of insertion, depending on the situation. Depending on the case, the depth of insertion may be the same.

The insertion length of at least one end of the decorative sheets 410, 420 is 0.01 to 0.5 mm, 0.01 to 0.45 mm, or 0 from the upper surface of the main body 310, 320. It may be inserted to a depth of 0.01 to 0.4 mm. If the insertion length is less than the above depth, the decorative sheet may float or peel off from the synthetic resin profile main body. cannot be manufactured.

On the other hand, referring to FIGS. 3 and 4, in the conventional synthetic resin profile product for fittings of Comparative Example 1, the width and height of the weld line L are still large even after the burr B is removed. There is a problem that the decorative sheet S is easily lifted or peeled off from the main body P, and the welding line L is easily contaminated by foreign matter, thereby degrading the appearance quality of the product.

In such a synthetic resin profile product for joinery of the present invention, as described above, the ends of the synthetic resin profile 10 are melted by the heating plate 120, and at the same time, the burrs 20a generated during the melting process are immediately removed. , the weld line 500 created at the surface of the weld 20, since the ends of the plastic profiles 10 are welded together with the heating plate 120 removed, thereby preventing additional burrs from occurring in the welding process. can be minimized.

The ends of the main bodies 310 and 320 and the ends of the decorative sheets 410 and 420, which had sunk during the melting process by the heating plate 120, did not rise while forming burrs, and the ends of the decorative sheets 410 and 420 sunk. The state of being inserted between the ends of the main bodies 310 and 320 is maintained as it is, and thereafter, by cooling, the binding force between the main bodies 310 and 320 and the decorative sheets 410 and 420 is doubled, and the main bodies 310 and 320 are separated from each other. It is possible to prevent the decorative sheets 410 and 420 from floating or peeling off.

Preferred examples are presented below to aid understanding of the present invention, but the following examples are merely illustrative of the present invention, and various changes and modifications can be made within the scope and technical spirit of the present invention. It should be obvious to those skilled in the art that such changes and modifications are within the scope of the appended claims.

1. Examples (1) Example 1
Four profiles with decorative sheets attached to the surface of a main body made of PVC were fixed in the shape of a square frame to left and right clamps provided with upper and lower pressure pieces of the seamless welding apparatus 100 of FIG.

Next, after inserting a concave-convex heating plate having a temperature of 230 to 250° C. between the ends of the corners of the profile, the profile is brought into contact with the heating plate, and then pressurized to Melt for 24-29 seconds until the edges of the profile are melted. At this time, the burrs are removed by the blades 113 provided on the upper and lower pressure pieces.

After that, the heating plate was ejected and removed, after which the ends of the profile were welded face-to-face through left and right clamps.

Finally, the weld zone was cooled at room temperature to produce a synthetic resin profile product for joinery including the synthetic resin profile 10 welded through the weld zone 20 of Example 1.

(2) Example 2
A synthetic resin profile product for joinery including the synthetic resin profile 10 welded via the weld 20 of Example 2 was manufactured in the same manner as in Example 1 above.

(3) Example 3
A synthetic resin profile product for joinery including the synthetic resin profile 10 welded via the weld 20 of Example 3 was manufactured in the same manner as in Example 1 above.

2. Comparative example (1) Comparative example 1
Four profiles each having a decorative sheet attached to the surface of a main body made of PVC were fixed in the shape of a square frame to a general welding device (HAN SUNG machine, TWL welding machine) that was not a seamless welding device.

Next, after inserting a flat-type heating plate having a temperature of 260° C. between the ends of the corners of the profile, the profile is brought into contact with the heating plate and then pressurized to form the profile. The ends were melted for 21-25 seconds.

After that, the heating plate was ejected and removed, after which the ends of the profile were welded face-to-face through left and right clamps.

Finally, after the weld was cooled at room temperature, a finishing machine was used to remove the burrs protruding between the cut surfaces, resulting in a joinery composition comprising the profile joined via the weld of Comparative Example 1. A resin profile product was produced.

[Experimental example]
1. SEM (Scanning Electron Microscope) Photographs Cross-sections of the welds of the joinery profile products of Examples 1 to 3 and Comparative Example 1 were photographed at different magnifications with a scanning electron microscope (Zeiss, Merlin Compact).

2. OM (Optical Microscope) Photography Cross-sections of the welds of the fitting profile products of Examples 1 to 3 and Comparative Example 1 were photographed with an optical microscope (Huvitz, HRM-300).

3. CLSM (Confocal Laser Scanning Microscope) Photographs Cross-sections of the welds of the joinery profile products of Examples 1 to 3 and Comparative Example 1 were photographed with a confocal laser scanning microscope (Leica Microsystems, DCM3D).

4. Weld Line Width and Height The weld line width and height of the joinery profile products of Examples 1-3 and Comparative Example 1 were analyzed using OM and CLSM photographs.

At this time, the width and height were measured three times for three different points on the surface of the welding line of each fitting profile product, and the average values are listed in Table 1.

5. Whether or not the edge of the decorative sheet was inserted and measurement of the insertion depth Whether or not the decorative sheet was inserted into the main body was examined through SEM photographs of the cross sections of the welded portions of the fitting profile products of Example 1 and Comparative Example 1. It was confirmed.

In addition, when the decorative sheet was inserted into the main body, the depth of the inserted decorative sheet was calculated and shown in Table 1.

At this time, the decorative sheet positioned on the left side of the photograph of the cross section is indicated as the decorative sheet 1, and the decorative sheet positioned on the right side is indicated as the decorative sheet 2 in Table 1.

6. EDS (Energy Dispersive X-ray Spectroscopy) Mapping Analysis The weld composition of the joinery profile product of Example 1 was analyzed with an energy dispersive spectrometer (Zeiss, Merlin Compact).

As a result of analysis from the OM photograph and the CLSM photograph, the synthetic resin profile products for fittings of Examples 1 to 3 have small width and height of the welding line, and unlike the synthetic resin profile product for fittings of Comparative Example 1, the main body It was confirmed that the white color was at such a slight level that it could not be visually confirmed. As a result of analysis of SEM and OM photographs, the synthetic resin profile products for fittings of Examples 1 to 3 differ from the synthetic resin profile products for fittings of Comparative Example 1, in which the edge of the decorative sheet protrudes upward from the upper surface of the main body. Unlike , it was confirmed that the edge of the decorative sheet was inserted inside from the upper surface of the main body. As a result, it was confirmed that the synthetic resin profile products for fittings of Examples 1 to 3 had the effect of preventing the decorative sheet from floating or peeling off from the main body.

Separately from this, as a result of EDS mapping analysis of the welded part of Example 1, the Ca inorganic element, which is the main component contained in the PVC resin composition of the main body, was detected, and there was a weld line on the surface. However, it was confirmed that the level was such that it could not be visually confirmed.

REFERENCE SIGNS LIST 10 synthetic resin profile 20 weld 20a burr 21 uneven surface 23 flat surface 30 weld surface 100 seamless welding device 110 left and right clamps 111 upper pressure piece 112 lower pressure piece 113 blade 113a vertical surface 113b inclined surface 114 spring 115 stopper 117 vacuum Suction port 120 Heating plate 121 Uneven part 123 Flat part 125 Spacing block 310, 320 Main body 410, 420 Decoration sheet 500 Welding line

Claims (6)

A synthetic resin profile product for fittings comprising a synthetic resin profile (10) welded via a weld (20),
The weld line (500) of the weld (20) has a width of 0.001 to 0.25 mm and a height of 0.001 to 0.15 mm ,
The synthetic resin profile (10) includes main bodies (310) and (320) and decorative sheets (410) and (420) attached to the surfaces of the main bodies (310) and (320),
at least one end of the decorative sheets (410) (420) is inserted into the body (310) (320),
At least one end of the decorative sheets (410) (420) is inserted into a depth of 0.01 to 0.5 mm from the upper surface of the main body (310) (320), a synthetic resin profile for fittings. product. The synthetic resin profile product for joinery according to claim 1, wherein the weld line (500) of the weld (20) has a width of 0.005-0.23 mm and a height of 0.005-0.13 mm. . The synthetic resin profile product for joinery according to claim 1, wherein the weld line (500) of the weld (20) has a width of 0.01-0.20 mm and a height of 0.01-0.10 mm. . The synthetic resin profile product for joinery according to claim 1 , wherein both ends of said decorative sheets (410) (420) are inserted inside said body (310) (320). The synthetic resin profile for joinery according to claim 4, wherein the ends of the decorative sheets (410) (420) are respectively inserted into the interior of the body (310) (320) at the same depth or different depths. product. According to claim 1 , at least one end of the decorative sheets (410) (420) is inserted to a depth of 0.01 to 0.4 mm from the upper surface of the main body (310) (320). synthetic resin profile products for fittings.

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