KR100521723B1 - A synthetic resin panel of a single body - Google Patents

Abstract

The present invention is an extruder 100 for extruding and transporting a synthetic resin raw material; Inlet 200, a transport pipe for transporting the synthetic resin material flowing from the extruder 100, a discharge port 206 for discharging the synthetic resin material transferred from the transport pipe, the space portion 210 through which the synthetic resin raw material passes A profile die (102) including a plurality of cores (212) formed in the space portion and an air hole (216) formed in one end surface of the core; A sizing plate 104 having a vacuum nozzle 300 and a plurality of vacuum tubes 304 to prevent the molded panel from being recessed; An integrated panel having a plurality of hollow parts 220 is provided by a synthetic resin panel manufacturing apparatus including a cooling bath 106 for cooling the panel. Therefore, since the panel in which the hollow part is formed is produced in one piece, the manufacturing process is simplified and the rigidity is improved.

Description

Integrated synthetic resin panel {A SYNTHETIC RESIN PANEL OF A SINGLE BODY}

The present invention relates to an integrated synthetic resin panel of the present invention, and more particularly, to a synthetic resin panel formed integrally by extrusion molding.

In general, synthetic resin panel is a construction member mainly used as a wall part at the construction site, conventionally, wood or steel panel is mainly used as a wall part for construction members, but recently, a synthetic resin panel mainly containing polyethylene is used. .

Synthetic resin panel is composed of polyethylene as a main component, so it has strong chemical stability, does not easily react with external materials, has high strength, and can be welded by plastic, so it has good workability. It is widely used in buildings or structures such as warehouses, parking towers, shops and exhibition halls.

In order to withstand high loads and bending stresses from the outside, such synthetic resin panels were manufactured by welding a curved plate portion to a flat plate portion by welding or the like.

Patent No. 174788, filed on April 4, 1995 and registered on February 18, 1999 (hereinafter referred to as "prior art"), discloses a synthetic resin panel, hereinafter, the prior art drawings. It will be described with reference to.

6 is a cross-sectional view of a synthetic resin panel according to the prior art.

As shown in FIG. 6, the conventional synthetic resin panel was manufactured by separately molding the flat plate portion 500 and the curved plate body portion 502 having a curved shape, and bonding them by plastic welding or the like.

By combining the flat plate portion 500 and the curved plate portion 502, the synthetic resin panel is formed with the groove portion 504 and the hollow portion 506, thereby to withstand the load or bending stress acting from the outside It became.

However, since the conventional synthetic resin panel is manufactured by an adhesive method, the adhesive portion 508 between the flat plate portion 500 and the curved plate portion 502 is fragile when used for a long time or when subjected to water leakage and corrosion for a long time. There was a problem that the resistance to the load or bending stress applied from the outside becomes weak.

In addition, as in the prior art, since the flat plate portion 500 and the curved plate body portion 502 are separately molded and subsequently melt-bonded, there is a problem that the process becomes complicated and the manufacturing cost increases.

In the present invention, in order to solve the problems of the prior art as described above, to propose a synthetic resin panel molded integrally.

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In order to achieve the object as described above, in the present invention, a synthetic resin panel in which the hollow part is integrally formed inside the panel by extruding the synthetic resin melt through a profile die including a plurality of cores in the interior space. The hollow part has a cross-sectional shape corresponding to the core by being cooled through the core to prevent depression, and an integral synthetic resin panel which is opened in the extrusion progress direction and arranged in a direction perpendicular to the extrusion progress direction inside the panel. In addition, the extruded synthetic resin panel through the profile die is passed through the sizing plate to prevent the upper and lower planes above and below the hollow part inside the panel from being deformed to keep the panel flat. It is characterized by. In addition, the hollow portion is characterized in that the trapezoid, rectangular, ellipse, hexagon, circular shape is made of any one or a combination thereof. Hereinafter, with reference to the accompanying drawings will be described in detail a one-piece synthetic resin panel according to a preferred embodiment of the present invention.

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1A and 1B are a perspective view and a cross-sectional view showing an integrated synthetic resin panel according to the present invention.

As shown in Figure 1a, 1b, the integral synthetic resin panel (225: hereinafter referred to as 'panel') according to the present invention is formed in an integral plate shape having a predetermined width and thickness, the upper plane 222 ) And the lower plane 224 has a structure in which a plurality of hollow portions 220 are formed. The hollow part 220 has a structure in which both sides are opened in a direction in which the panel 225 is extruded (A direction in FIG. 3B), and a plurality of the hollow parts 220 are arranged in a horizontal direction. The hollow portion 220 may be formed in various shapes such as trapezoidal, square, circular, elliptical, hexagonal and the like. Such a panel 225 is itself easy to manufacture because it is integrally extruded. That is, the operation of joining separately manufactured members to form the panel 225 can be eliminated, and since the two members are not combined, they can have sufficient strength to withstand loads such as bending stress. . Looking at the process for manufacturing such a panel 225 is as follows. First, as shown in FIG. 2, the apparatus for manufacturing the panel 225 according to the present invention includes an extruder 100, a profile die 102, a sizing plate 104, a cooling water tank 106, and a drawer 108. ), A cutter 110, and a stocker 112.

The extruder 100 generally has a single screw or a twin screw method, and a single screw method is mainly used, and granular or powder resins supplied through a hopper (not shown) ( RESIN) is dissolved in a heating cylinder and the melt is transported to the profile die 102 while kneading and compacting by rotation of the screw.

Extruder 100 is already known to those skilled in the art, so the drawings and further description of the extruder are omitted herein.

Meanwhile, according to the present invention, a high density polyethylene resin (HDPE) having a density of at least 0.962 or more is used for molding the high strength panel 225, and a plastic anti-aging agent for increasing durability is used. In addition, rapid crystallization resins for molding stability and thickness variation reduction are used.

The extruder 100 according to the present invention is such that the ratio of the entire screw screw to the screw outer diameter is about 24 to 26, and the compression ratio is 4 to 4.4. do.

The melt transported by compression through the extruder 100 flows into the profile die 102 and is extruded into a cross section close to the shape of the panel 225 in the profile die 102.

3A is a top front view of the profile die according to the preferred embodiment of the present invention, in which melt introduced through the inlet port 200 is discharged to the outlet port 206 along the conveying pipe lines 202 and 204.

The profile die 102 according to the present invention is designed as a CENTER FEED FLOW TYPE, and includes a first conveying conduit and a second conveying conduit. That is, a first feed conduit 202 is provided extending from the inlet 200 to both sides of the profile die 102, from the middle of the profile die to the central side of the profile die symmetrically to the first feed conduit 202. A branching second conveying line 204 is provided.

Therefore, according to the present invention, there is no dead point in the flow path so that the melt can be discharged without stagnation.

Figure 3b is a perspective view of the panel molded portion of the profile die according to an embodiment of the present invention.

As shown in FIG. 3B, the panel molding part according to the present invention includes a heating plate 226, a heater driving part 208, a space part 210, a core 212, an air inlet 214, and an air hole 216. can do.

As described above, the melt discharged through the discharge port 206 of the profile die flows into the panel molding portion in the direction A of FIG. 3B.

The melt passes through the space portion 210 while being continuously maintained in the molten state by the heating plate 226 heated by the heater driver 208.

Since a plurality of cores having a predetermined shape are provided in the space 210, when the melt passes through the space 210, the outer wall 218 corresponds to the core of the inside as illustrated in the lower portion of FIG. 3B. The panel consisting of a plurality of hollow portion 220, the upper plane 222 and the lower plane 224 flows out. The hollow part 220 is opened in the extrusion progress direction (A direction) inside the panel, and a plurality of the hollow parts 220 are arranged in a direction perpendicular to the extrusion progress direction (horizontal and horizontal directions in FIG. 3B).

Problems in which the hollow part 220 is recessed may occur while the panel is spilled from the panel forming part. In order to prevent this, the present invention provides an air hole 216 in each core.

That is, the present invention by supplying air continuously through the air hole 216 to the hollow portion 220 of the panel flowing out of the panel forming portion, it is possible to cool the hollow portion to prevent its depression.

According to another embodiment of the present invention, the hollow part may be cooled through the internal cooler, and FIG. 4C is a view illustrating a configuration in which an internal cooler is installed at one side of the core of the panel molding part shown in FIG. 4B.

FIG. 4C illustrates only one of the plurality of cores of FIG. 4B, and as shown in FIG. 4C, an internal cooler 230 extends from one side of the core. Since the internal cooler 230 according to the present invention continuously discharges air in a state surrounded by the hollow part 220 of the panel flowing out of the panel forming part, the cooling area becomes wider than using the air hole 216 alone. The shorter the distance between the internal cooler 230 and the hollow part 220 is, the higher the cooling effect can be.

Meanwhile, in the drawings of the present invention, the shape of the core is illustrated as a rectangular cross section, but is not limited thereto, and cores having various shapes such as circles, triangles, trapezoids, and ellipses may be provided. It will be apparent to those skilled in the art that the cross section may be of various shapes.

The panel formed by the above process is introduced into the sizing plate 104 to maintain its appearance.

Figure 4a is a side view of a sizing plate according to a preferred embodiment of the present invention, Figure 4b is a sectional view of the main portion of the sizing plate shown in Figure 3a, the panel flowing out of the profile die flows in the B direction. The sizing plate 104 is to prevent the depression of the upper plane and the lower plane, and as shown in FIG. 4A, includes a vacuum nozzle 300 and a coolant conduit 302, and a plurality of vacuum tubes 304 are disposed therein. ).

When the vacuum nozzle 300 discharges air to the outside to make the inside of the sizing plate 104 in a vacuum state, the sizing plate 104 includes a plurality of vacuum tubes 304 formed at predetermined intervals inside the sizing plate 104. The upper plane and the lower plane of the panel passing in the B direction is pulled out.

Since the panel according to the present invention is integrally extruded, a problem may occur in which the hollow part is recessed during processing. The sizing plate 104 according to the present invention installs a vacuum tube 304 at regular intervals in the moving direction of the panel. The vacuum tube 304 can hold the upper plane 222 and the lower plane 224 of the panel to solve the depression problem of the hollow part.

On the other hand, Figure 4c is a top perspective view of the sizing plate shown in Figure 4a, the sizing plate 104 according to the present invention is to arrange the vacuum tube 304 on a plurality of main line (308) at regular intervals In addition, a sub line 310 is further provided between the main lines 308, and a plurality of sub vacuum tubes 306 are disposed thereon.

When the present inventors provide only the vacuum tube 304, the depression of the center portion of the panel is effectively prevented while the panel passes through the sizing plate 104, but the panel depression in the direction of the outer wall 218, i.e. It has been found that there is a problem that is not effectively prevented. In order to solve this problem, the inventor has further provided an auxiliary vacuum tube 306 between the main lines 308, as shown in FIG. 3C.

Meanwhile, according to the present invention, in order to further increase the effect of maintaining the shape of the panel, although the sizing plate 104 composed of a single unit is configured in at least three stages, various sizes of the sizing plate 104 may be provided without being limited thereto. It will be apparent to those skilled in the art.

As such, the panel having a constant external cross section through the sizing plate 104 is introduced into the cooling bath 106 for cooling.

5 is a perspective view of a cooling tank according to an embodiment of the present invention, the cooling tank 106 according to the present invention is a cooling hose 400, the cooling water inlet 402, a plurality of support bar (404) ) May be provided.

In addition, although the cooling bath 106 is not shown in the figure, as the inside of the sizing plate 104 maintains a weak vacuum, it is possible to maintain a constant shape while the panel passes through the cooling bath.

There is a problem that the shape of the panel may change while the panel passes through the cooling bath 106 in the C direction.

Accordingly, the cooling bath 106 according to the present invention arranges the plurality of support bars 404 adjacent to the upper plane 222 and the lower plane 224 of the panel so that the panel moves while the cooling bath 106 is moved. The upper plane 222 and the lower plane 224 may be prevented from deformation such as swelling.

On the other hand, according to the present invention, a system of two-stage vacuum is used to prevent bubbles from forming on the panel wall and to maximize the cooling effect, and to prevent thermal shrinkage, a heat treatment is performed to perform thermal equilibrium by performing sufficient inner ear. An annealing operation is performed.

The panel integrally molded as above is passed through the cooling bath to pass through the intake unit 108, it is important that the intake unit 108 properly maintains the dimensions of the extruded panel at a tension rate without proper tension and pulsation. .

In general, a belt type, multi-point driving roller type and a caterpillar type injector are used for the intake unit 108. However, in the present invention, a caterpillar having a good tensile force in producing a panel having a large area and a load is used. Use a food drawer.

The panel passing through the take-off machine is cut to a certain dimension via the cutter 110, and is loaded on the stocker 112 in a completed form.

Preferred embodiments of the present invention described above are disclosed for purposes of illustration, and those skilled in the art will be able to make various modifications, changes and additions within the spirit and scope of the present invention. Additions should be considered to be within the scope of the following claims.

As described above, since the panel in which the hollow part is formed is produced in one piece, the manufacturing process is simplified, and rigidity is improved.

In addition, according to the present invention, as compared with the conventional synthetic resin panel that was made thick to cope with the load or bending stress applied from the outside, the thickness can be reduced through the integral extrusion molding, thereby reducing the manufacturing cost and construction cost There is an advantage.

In addition, according to the present invention, the synthetic resin panel manufacturing apparatus is provided with an air hole or an internal cooler in the core, so that the synthetic resin panel can be manufactured integrally.

Further, according to the present invention, not only the vacuum tube disposed on the main line inside the sizing plate, but also the auxiliary vacuum tube is further disposed on the auxiliary line, so that the hollow portion of the panel spilled from the profile die can be effectively prevented from sinking. There is an advantage.

Further, according to the present invention, since the support bar is provided inside the cooling bath, there is an advantage that the shape of the panel can be effectively prevented from being deformed.

Figure 1a, 1b is a perspective view and a cross-sectional view showing an integral synthetic resin panel according to the present invention. Figure 2 is a block diagram showing a schematic configuration of a synthetic resin panel manufacturing apparatus for producing an integral synthetic resin panel according to the present invention.

3A is a front elevational view of a profile die for producing an integral synthetic resin panel according to the present invention.

FIG. 3B is a perspective view of a panel forming part of the profile die shown in FIG. 3A. FIG.

FIG. 3C is a perspective view illustrating a configuration in which an internal cooler is installed at one side of the core of the panel molding unit shown in FIG. 3B. FIG.

Figure 4a is a side view showing a sizing plate of the manufacturing apparatus for manufacturing the integral synthetic resin panel according to the present invention.

4B is an essential part cross sectional view of the sizing plate shown in FIG. 4A;

4C is a top perspective view of the sizing plate shown in FIG. 4A.

Figure 5 is a perspective view showing a cooling tank of the manufacturing apparatus for producing an integral synthetic resin panel according to the present invention.

6 is a cross-sectional view of the synthetic resin panel according to the prior art.

<Description of main parts of drawing>

200 --- Inlet 202, 204 --- First and second conveying line

206 --- Discharge outlet 208 --- Heat drive part

210 --- space 212 --- core

214 --- Air inlet 216 --- Air hole

220 --- Hollow 222 --- Upper plane 224 --- Lower plane 225 --- Panel

230 --- internal cooler 304 --- vacuum tube

306 --- auxiliary vacuum tube 404 --- support bar

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Claims (4)

A synthetic resin panel in which a hollow part is integrally formed inside a panel by extruding a synthetic resin melt through a profile die including a plurality of cores in a space therein, wherein the hollow part is cooled through the core to prevent depression. An integral synthetic resin panel having a cross-sectional shape corresponding to the core and arranged in a direction perpendicular to the extrusion progress direction and open in the extrusion progress direction inside the panel. The method of claim 1, wherein the extruded synthetic resin panel through the profile die is passed through the sizing plate to prevent the upper and lower planes above and below the hollow portion inside the panel is deformed to maintain the flat shape of the panel Integral synthetic resin panel, characterized in that. The integrated synthetic resin panel according to claim 1 or 2, wherein the hollow portion has a shape which is any one selected from a trapezoid, a square, an ellipse, a hexagon, a circle, or a combination thereof. delete