KR20110033329A - Method for manufacturing hollow spacer inserted in slab of building - Google Patents

Abstract

PURPOSE: A method for manufacturing a hollow spacer buried in a slab of a building is provided to prevent the transmission of noise and vibration between the slabs of floors by producing a spacer with ultra-low internal pressure. CONSTITUTION: A method for manufacturing a hollow spacer buried in a slab of a building is as follows. A PP(Polypropylene) or PE(Polyethylene) plastic material(1) is fused. The fused material is extruded through a cylinder(210) into a first base material(50) of cylinder shape. The first base material is cut and heated to be compressed through injection molds(200a,200b). An air blower(230) is inserted through the injection molds into the first base material and injects the air to form a second base material(60) with a hollow. A stopper(20) is installed in a vent hole(30) of the second base material. A suction nozzle(240) draws in the air remaining in the hollow in order to complete a hollow spacer in which the inside of the second base material is kept in an ultra-low pressure state.

Description

Method for manufacturing hollow spacer inserted in slab of building}

The present invention relates to a hollow spacer embedded in a slab of a building structure, and more particularly, to prevent noise and vibration between floors by changing a manufacturing method of a hollow spacer embedded in an interlayer slab of a building so as to reduce concrete usage. In addition, the present invention relates to a method of manufacturing a hollow spacer to prevent shrinkage and expansion according to seasons.

In general, when constructing a low-rise building or a high-rise building, a slab structure is provided between the floors and the floors. At this time, the structure of the slab is made of steel and concrete.

Generally, concrete has a very high compressive strength, but since the concrete is not subjected to a tensile force under the action of a bending moment, steel is used to reinforce the tensile force. For this purpose, a structure is typically built in which slabs are reinforced in the transverse and longitudinal directions.

In this case, the compressive strength of the concrete and the tensile strength of the reinforcing bar is made in consideration of the building floor loading load, fixed load, earthquake load, wind load.

As the reinforcing bar is embedded in the slab, the bending and tensile strength of the slab are enhanced, and also the role of suppressing cracking of the concrete is increased.

However, the slab structure used in the construction of high-rise buildings as described above, despite the various advantages, due to the weight of the concrete, the amount of rebar is inevitably forced to reinforce.

In other words, according to the recent trend of higher buildings, the use of concrete and reinforcing bars is increasing.

In particular, in recent years, the rebar price has increased due to the rise in oil prices and international raw material prices, and carbon dioxide gas generated during cement firing is a new environmental problem. Is being presented.

In addition, the floor noise and vibration noise generated between slab floors have been proposed as a new social problem and remain a problem that must be solved.

In order to solve the above problem, the spherical spacer is seated on the truss structure so that the concrete usage is reduced by the volume occupied by the spacer, and the spacer intercepts the transmission of vibration generated in the slab to the lower floor. A method using a spacer has been proposed.

However, these spacers have the effect of reducing the amount of concrete used and the effect of blocking the noise and vibration between the layers, but the structure of the spacer is made of plastic by injection molding two hemi-spherical body to be bonded to each other and bonded to each other Since it is formed of hollow hollow spherical body, a closed space is formed inside, and the concrete is formed by the expansion and contraction of the spacer according to the change of temperature of the season during construction. The gap is generated between the outer surface of the spacer there is a problem that threatens the stability of the construction, which eventually causes cracks in the slab.

To this end, in a spacer having a hollow hollow plastic body embedded in the slab to be used to reduce the amount of concrete, the plastic body is formed in the slab of the building, characterized in that the air communication hole communicating the inside and outside is formed. A technology having a spacer for reducing the amount of concrete to be embedded is disclosed in patent no.

However, the 'spacer for reducing the amount of concrete embedded in the building slab' disclosed in Patent Registration No. 777052 has an effect of preventing the expansion and contraction of the spacer by forming the communication hole, but through the communication hole formed in the spacer As air moves freely into and out of the spacer, there is a problem that the reduction effect on the interlayer noise and vibration of the slab is inferior.

This is precisely because the air present inside the spacer maintains a medium for transmitting noise and vibration.

The present invention has been made to solve the above problems and technical biases, and an object of the present invention is to provide a method of manufacturing a hollow spacer embedded in the slab of the building to maintain the ultra-low pressure state of the interior of the spacer.

In order to achieve the above object, in the hollow spacer to form a hollow inside, buried in the interlayer slab of the building to prevent noise and vibration between floors and to reduce the amount of concrete, PP (polypropylene) or PE Melting (Polyethylene) plastic raw material (S1); Primary molding material forming step (S2) for extruding the molten raw material in the form of a cylinder through a cylinder; Cutting the primary base material when the primary base material to be extruded is positioned at a predetermined length, and simultaneously squeezing the primary base material by dividing the injection mold into a state in which the inner base material has a predetermined shape (S3); Inserting an air blower into the inside of the primary base material through the divided injection molds (S4); The secondary base material is formed by injecting air into the inside of the primary base material through the air blower to bring the primary base material into close contact with the inner wall of the injection mold so that the inside is formed with a hollow and an air vent communicating with the hollow on the outer circumferential surface thereof. Molding step (S5); Mounting a stopper on a vent formed on an outer circumferential surface of the secondary base material (S6); Passing through a suction nozzle through the stopper mounted on the secondary base material to suck air remaining in the hollow to maintain the inside of the secondary base material in an ultra low pressure state to complete the hollow spacer (S7); Provided is a method of manufacturing a hollow spacer embedded in a slab of a building, characterized in that configured to include.

In this case, by injecting air into the interior of the primary base material through the air blower and the primary base material is in close contact with the inner wall of the injection mold to form a hollow inside while communicating with the hollow on the outer peripheral surface is formed After the secondary base material forming step, the step of removing the injection flash formed around the molded secondary secondary material may be further included.

On the other hand, the plug is preferably formed in the outward flange portion to make intimate contact with the inner circumferential surface of the vent when the inside of the hollow spacer to achieve an ultra low pressure state.

At this time, the stopper is preferably made of a rubber material having a high elasticity.

In addition, the stopper may be made of an inclined surface gradually decreases in width from the top to the bottom.

In addition, it is preferable that any one of spherical shape, elliptical shape, and polygonal shape is selected as the shape of the hollow space.

According to the manufacturing method of the hollow spacer embedded in the slab of the building of the present invention having the above configuration, the interlayer of the slab as the air to act as a medium for transmitting the noise and vibration inside the hollow spacer is manufactured in an ultra low pressure state It is effective to block noise and vibration.

In addition, when the hollow spacer is embedded in the slab, the gap between the concrete and the hollow spacer is generated by replacing the change of the volume for the shrinkage and expansion of the spacer with the influence of the season to replace the high-elastic stopper mounted on the hollow spacer. It is effective to prevent.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. The present embodiments and drawings are intended to assist the understanding of the present invention and are not intended to limit the scope of the invention in any way.

The manufacturing method of the hollow spacer embedded in the slab of the building of the present invention is manufactured to have an excellent function against the noise and vibration blocking, while having the hollow spacer more stable structure.

1 is a perspective view showing a hollow spacer according to the present invention.

As shown in FIG. 1, the hollow spacer 100 includes a body 10 having a spherical shape, and a stopper 20 mounted to the body 10.

The hollow spacer 100 is injection molded using a PP or PE plastic raw material (1). At this time, the body 10 of the hollow spacer 100 is bonded to each other by heat fusion in a state divided into two to form a single body 10 to form a sphere shape as a whole.

In addition, the molding method of the hollow spacer 100 may be molded integrally according to the injection method. At this time, the spacer 100 is preferably molded by the addition of a flame retardant. This is to prevent the fire of the building in case of emergency in such a way that the combustion does not occur well even in response to the fire and the toxic gas is hardly generated even if the fire occurs.

In the present embodiment, the hollow spacer 100 is described as an example of a spherical shape, but is not necessarily limited thereto. Any one of a spherical shape, an elliptical shape, and a polygonal shape may be selected and used.

In addition, the inside of the body 10 of the hollow spacer 100 is formed in the hollow hollow inside, the inside is an ultra low pressure state with a low density of air to block the transmission of noise and vibration.

That is, since air is a medium that transmits waves of noise and vibration, noise and vibration are blocked when the air exists in the ultra low pressure state inside the hollow spacer 100.

Therefore, when the hollow spacer 100 is embedded in the slab, the hollow spacer 100 blocks the interlayer noise and vibration generated between the layers of the slab.

At this time, one vent 30 communicating with the inside of the hollow spacer 100 is formed on an outer circumferential surface of the hollow spacer 100, and the vent 30 is closed by a stopper 20.

Therefore, the inside of the hollow spacer 100 is able to maintain an ultra-low pressure state while being disconnected from the outside through the stopper 20.

The stopper 20 has an outward flange portion 23 formed in close contact with the inner circumferential surface of the vent 30 when the inside of the hollow spacer 100 is in an ultra low pressure state, in which case the hollow spacer ( In the vent 30 formed in the 100, it is preferable that a locking projection 33 is formed to cover the outward flange portion 23 formed on the stopper 20.

At this time, the stopper 20 is preferably made of a high elastic rubber material that is easy to shrink and expand according to the change in temperature.

On the other hand, the shape of the stopper 20 may be made of an inclined surface gradually decreases in width from the top to the bottom. In this case, the shape of the vent 30 formed in the hollow spacer 100 is preferably formed to correspond to the shape of the stopper (20).

The stopper 20 is in contact with the vent 30 formed in the hollow spacer 100 by the ultra-low pressure, the process of shrinking and expanding due to temperature changes will be described later.

Next, the manufacturing method of the hollow spacer 100 of the present invention will be described.

2 is a flowchart illustrating a method of manufacturing the hollow spacer 100 according to the present invention, FIG. 3 is a reference diagram illustrating a method of manufacturing the hollow spacer 100 according to the present invention, and FIG. 4 is a hollow according to the present invention. It is sectional drawing of the principal part which showed the example in which the stopper 20 attached to the spacer 100 was deformed.

As shown in FIG. 2, the method of manufacturing the hollow spacer 100 may include melting a plastic raw material 1 of polypropylene (PP) or polyethylene (PE) series (S1); Forming a primary base material (50) for extruding the molten raw material (1) in a cylindrical shape through a cylinder (210) (S2); When the primary base material 50 to be extruded is positioned at a predetermined length, the injection molds 200a and 200b which are bisected while cutting the primary base material 50 and having a predetermined shape on the inside thereof are the primary base material. Heating and pressing the step 50 (S3); Inserting an air blower (230) (air blower) into the interior of the primary base material (50) between the divided injection molds (200a, 200b) (S4); While injecting air into the interior of the primary base material 50 through the air blower 230, the primary base material 50 is in close contact with the inner walls of the injection molds (200a, 200b) to form a hollow inside Forming a secondary base material 60 having a vent 30 communicating with a hollow on an outer circumferential surface thereof (S5); Mounting a stopper (20) on the vent (30) formed on the outer circumferential surface of the secondary base material (60) (S6); The suction nozzle 240 penetrates through the stopper 20 mounted on the secondary base 60 to suck air remaining in the hollow to maintain the inside of the secondary base 60 at an ultra low pressure state. By the step (S7) to complete the hollow spacer 100; molded through.

Hereinafter, with reference to FIGS. 2 to 4 will be described in more detail.

First, the melting of the polypropylene (PP) or the polyethylene (PE) -based plastic raw material 1 (S1) is a step of resinizing the raw material 1 of the hollow spacer 100.

The PP or PE pulverized into a predetermined granule is introduced into the melting furnace and melted into a semi-solid resin. In this case, a separate compound (additives such as fillers, pigments, antioxidants, etc.) for the color and anti-aging, reinforcement, and increase of the color of the hollow spacer 100 is added to the melting furnace.

Therefore, since the hollow spacer 100 molded by the raw material 1 is light and has strong chemical resistance, water resistance, and mechanical strength, when the hollow spacer 100 is embedded in the slab, the overall strength of the slab is guaranteed. .

Next, the primary base material 50 forming step (S2) of extruding the molten raw material (1) in the form of a cylinder through the cylinder 210, the resin material (1) prepared in the prepared cylinder 210 ).

Subsequently, the raw material 1 is extruded to the outside through the cylinder 210 while pressing the resinized raw material 1 introduced into the cylinder 210 through a separate pressing member (not shown). ).

In this case, as shown in FIG. 3B, the cylinder 210 is formed in a structure such that a space is formed inside the raw material 1 while maintaining a cylindrical shape. As a result, the resinized raw material 1 continuously discharges the cylindrical primary base material 50 through the cylinder 210.

Next, when the primary base material 50 to be extruded is positioned at a predetermined length, the injection molds 200a and 200b which are bisected while cutting the primary base material 50 and having a predetermined shape inside The step S3 of heating and pressing the primary base material 50 is a step of pressing the primary base material 50 through the injection molds 200a and 200b discharged through the cylinder 210.

First, when the cylindrical primary substrate 50 discharged from the cylinder 210 is a predetermined length, that is, the length enough to mold the hollow spacer 100, divided into two as shown in FIG. Compression is carried out by injection molds 200a and 200b. At this time, the inside of the injection mold (200a, 200b) has a spherical shape, the heating wire (not shown) is divided into two injection molding mold (200a, 200b) so that the primary base material 50 is melt-pressed by heating It is preferable to be built.

On the other hand, the primary base material 50 is cut by the insertion of the cutter 220 (cutter) at the same time as the pressing of the injection mold (200a, 200b).

Next, inserting an air blower 230 (air blower) into the interior of the primary base material 50 through the nutrient injection mold (200a, 200b) (S4) and the air blower 230 Injecting air into the inside of the primary base material 50 through the primary base material 50 is in close contact with the inner wall of the injection mold (200a, 200b) to communicate with the hollow on its outer peripheral surface while the hollow is formed The secondary base material 60 forming step (S5) in which the air vent 30 is formed is a step of forming a secondary base material 60 by forming a hollow inside the primary base material 50.

As shown in FIG. 3D, an air blower 230 is inserted into the primary base material 50 through the injection molds 200a and 200b that heat-press the primary base material 50.

At this time, the primary base material 50 is a state in which a predetermined space is formed inside the injection molds 200a and 200b since only the spherical outer portion formed inside the injection molds 200a and 200b is heat-compressed. .

This is because the primary base material 50 before pressing forms a cylindrical shape and a space is formed therein.

Thereafter, air is injected into the inside of the primary base material 50 through the air blower 230. In this case, the primary base material 50 is inflated by the pressure of the injected air and is in close contact with the inner walls of the injection molds 200a and 200b to have a hollow spherical shape.

Thereafter, the air blower 230 inserted into the primary base material 50 is removed through the injection molds 200a and 200b, and the injection molds 200a and 200b are shown in FIG. Separation is completed to form the secondary base material (60).

At this time, the vent 30 is formed on the outer circumferential surface of the secondary base material 60. The vent 30 is formed by the insertion of the air blower 230 is in communication with the hollow inside the secondary base material (60).

In this case, the periphery where the vent 30 is formed may further protrude to a predetermined thickness than the outer surface of the secondary base material 60. This is to reinforce that the strength of the periphery of the vent 30 is relatively lowered due to the vent 30 being formed.

At this time, it is natural that the shape corresponding to the protruding shape around the vent 30 is formed in the spherical shape inside the divided injection molds 200a and 200b.

On the other hand, by injecting air into the interior of the primary parent material 50 through the air blower 230, the primary parent material 50 is in close contact with the inner wall of the injection mold (200a, 200b) to form a hollow inside While the secondary base material 60 forming step (S5) is formed in the outer circumferential surface and the vent 30 is in communication with the hollow after the step of removing the injection flash formed around the molded secondary base material 60 is further May be included.

This is completed by removing the injection flash formed around the secondary base material 60 when the secondary base material 60 is molded through the injection molds 200a and 200b as shown in FIG. 3 (F). This is to achieve a spherical shape.

Next, the step (S6) of mounting the stopper 20 to the vent 30 formed on the outer circumferential surface of the secondary base material 60, as shown in Figure 3 (G) through the vent (20) It is to block the flow of air existing in the hollow inside the secondary base material 60 by sealing 30).

Next, the suction nozzle 240 is penetrated through the stopper 20 mounted on the secondary base material 60 to suck in air remaining in the hollow, and the inside of the secondary base material 60 is ultra-low pressure. Maintaining the state to complete the hollow spacer 100 (S7); is the step of completing the hollow spacer 100 to maintain the ultra-low pressure state inside.

First, prepare a suction nozzle 240 that is a device for sucking air. As shown in FIG. 3 (H), the suction nozzle 240 penetrates through the stopper 20 mounted on the secondary base material 60 to be introduced into the hollow of the secondary base material 60.

Thereafter, the air remaining in the secondary base material 60 is sucked through the suction nozzle 240. In this case, the air inside the secondary base material 60 is discharged to the outside through the suction nozzle 240, and eventually the inside of the secondary base material 60 is ultra-low pressure state as the air pressure is lowered as the air is discharged do.

That is, since there is no air introduced at the same time as the air is discharged, the pressure inside the secondary base material 60 is lowered.

At this time, the stopper 20 is in close contact with the vent 30 while being pushed by the pressing force of the atmospheric pressure in accordance with the ultra-low pressure state inside the hollow spacer 100, thereby the interior of the hollow spacer 100 Maintains an ultra low pressure state.

Thereafter, as shown in FIG. 3 (I), the suction nozzle 240 is removed from the plug 20 to complete the hollow spacer 100 in an ultra low pressure state.

Since the inside of the hollow spacer 100, which is shaped as described above, is almost in a state in which air, which is a medium for transmitting waves of noise and vibration, is substantially absent, when the hollow spacer 100 is embedded in the slab, It prevents the noise and vibration generated between the floors.

On the other hand, when the hollow spacer 100 is embedded in the slab to have a change in volume with respect to shrinkage and expansion according to the seasonal temperature change, the high-elastic stopper 20 is replaced by the volume.

When the hollow spacer 100 contracts due to a decrease in the atmospheric temperature, as shown in FIG. 4, the volume of the hollow spacer 100 does not affect the hollow spacer 100 without shrinking due to the ultra low pressure. The change pressure of the stopper 20 is transmitted to the stopper 20 to prevent the shrinkage of the hollow spacer 100 as the stopper 20 causes deformation as shown in FIG. This is possible because the stopper 20 is formed of a high elastic rubber material.

On the other hand, when the hollow spacer 100 expands due to an increase in the atmospheric temperature, the hollow spacer 100 does not affect the hollow spacer 100 and the expansion of the hollow spacer 100 does not affect the inside of the hollow spacer 100. The change pressure of the volume to be transferred to the stopper 20 prevents the expansion of the hollow spacer 100 while causing the stopper 20 to deform as shown in FIG.

Accordingly, the hollow spacer 100 is prevented from contracting and expanding due to the influence of the season.

As described above, the hollow spacer 100 molded by the above manufacturing method blocks the interlayer noise and vibration of the slab as the inside of the hollow spacer 100 is manufactured at an ultra low pressure state, and according to the influence of the season. There is an effect of preventing a change in volume for shrinkage and expansion of the spacer.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit of the invention.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit of the invention.

For example, the shape and material of the hollow spacer 100, the shape of the vent 30 formed in the hollow spacer 100, the shape and material of the stopper 20 can not be a criterion for determining the technical scope of the present invention. Needless to say, that is only defined by the claims.

1 is a perspective view showing a hollow spacer according to the present invention.

2 is a flow chart showing a method of manufacturing a hollow spacer according to the present invention.

3 is a reference diagram showing a method of manufacturing a hollow spacer according to the present invention.

Figure 4 is a sectional view of the main portion showing an example in which the stopper is mounted on the hollow spacer according to the present invention.

<Explanation of symbols for main parts of the drawings>

1: raw material 10: body

20: stopper 23: outward flange

30: vent 33: step

50: 1st base material 60: 2nd base material

100: hollow spacer 200a, 200b: injection mold

210: cylinder 220: cutter

230: air blower 240: suction nozzle

Claims (6)

In the hollow spacer 100 to form a hollow inside, buried in the interlayer slab of the building to prevent noise and vibration between floors and to reduce the amount of concrete used, Melting the plastic raw material (1) of polypropylene (PP) or polyethylene (PE) series (S1); Forming a primary base material (50) for extruding the molten raw material (1) in a cylindrical shape through a cylinder (210) (S2); When the primary base material 50 to be extruded is positioned at a predetermined length, the injection molds 200a and 200b which are bisected while cutting the primary base material 50 and having a predetermined shape on the inside thereof are the primary base material. Heating and pressing the step 50 (S3); Inserting an air blower (230) (air blower) into the interior of the primary base material (50) between the divided injection molds (200a, 200b) (S4); While injecting air into the interior of the primary base material 50 through the air blower 230, the primary base material 50 is in close contact with the inner walls of the injection molds (200a, 200b) to form a hollow inside Forming a secondary base material 60 having a vent 30 communicating with a hollow on an outer circumferential surface thereof (S5); Mounting a stopper (20) on the vent (30) formed on the outer circumferential surface of the secondary base material (60) (S6); The suction nozzle 240 penetrates through the stopper 20 mounted on the secondary base 60 to suck air remaining in the hollow to maintain the inside of the secondary base 60 at an ultra low pressure state. Comprising a step of completing the hollow spacer 100 (S7); Method of manufacturing a hollow spacer 100 embedded in the slab of the building, characterized in that configured including. The method of claim 1, While injecting air into the interior of the primary base material 50 through the air blower 230, the primary base material 50 is in close contact with the inner walls of the injection molds (200a, 200b) to form a hollow inside After the forming of the secondary base material 60 in which the vent 30 communicating with the hollow is formed on the outer circumferential surface thereof, the method may further include removing the injection flash formed around the molded secondary base material 60. Method of manufacturing a hollow spacer 100 embedded in the slab of the building to be. The method according to claim 1 or 2, The stopper 20 is embedded in the slab of the building, characterized in that the outward flange portion 23 is formed so as to make intimate contact with the inner circumferential surface of the vent 30 when the inside of the hollow spacer 100 is in an ultra low pressure state. Method of manufacturing a hollow spacer 100. The method of claim 3, The stopper 20 is a manufacturing method of the hollow spacer 100 embedded in the slab of the building, characterized in that the rubber material having a high elasticity. The method according to claim 1 or 2, The stopper 20 is a manufacturing method of the hollow spacer 100 embedded in the slab of the building, characterized in that consisting of the inclined surface gradually decreases in width from the top to the bottom. The method according to claim 1 or 2, The hollow space is a shape of the hollow spacer 100 is embedded in the slab of the building, characterized in that any one of a spherical shape, elliptical shape, polygonal shape is selected.

Images