KR100756330B1 - The manufacturing mrthod of double drain board for removing water out of the damp ground - Google Patents

Abstract

A double drain board manufacturing method is provided to improve productivity and to cut down the manufacturing cost by simply forming through-holes by automatically removing projections with a cutting blade during transferring an extruded material. A double drain board manufacturing method comprises the steps of: extruding synthetic resin in a strip form; forming the both sides of a strip-shaped extruded material(41); cutting and removing projections(E) for through-holes; cutting the extruded material of a single drain board structure in the proper length; and overlapping two cut single drain boards. In the forming step, plural ribs(L) parallel to each other are set up in a longitudinal direction on the both sides of the extruded material. Plural recessed grooves(G) are formed between the ribs formed on one surface in a longitudinal direction. The projections for through-holes are formed between the ribs formed on the opposite surface corresponding to each recessed groove.

Description

The manufacturing mrthod of double drain board for removing water out of the damp ground}

1 is a perspective view of a conventional drain board.

Figure 2 is a cross-sectional view of a conventional drain board coupled to the filtering member.

Figure 3 is a process block diagram of a method of manufacturing a double drain board of the present invention.

4 is a cross-sectional view of the strip-like extrusion material,

  (A) is a cross-sectional view before molding,

  (B) is sectional drawing after shaping | molding.

5 is a schematic front view of a forming roller;

6 is a schematic plan view and a front view of a molding apparatus;

7 is a schematic view showing a cutting method of the projection.

8 shows a drain board,

  (A) is a cross-sectional view of a single drain board,

  (B) is sectional drawing of a double drain board.

            ((Explanation of symbols for main part of drawing))

      1. Drain board 2. Filter member 11. Plate

      12. Rib 41. Extruded material 61. Forming apparatus

      81. Single drain member 82. Double drain board

      E. Holes for opening G. Grooves H. Holes

      K. Cutting Knife L. Rib M. Mold

      R. Forming roller S. Opposing surface

The present invention, when manufacturing a double drain board overlapping two sheets of a single drain board for the removal of moisture contained in the soft soil, protrudes from one side of the single drain board to the other side during the molding process of the single drain board having an internal space Fabrication of a double drain board, which forms a plurality of through-holes and cuts and removes the through-holes during the transfer of the molded single drain board so that the through-holes are formed, thereby significantly improving the manufacturing productivity of the double-drain board. It is about a method.

In order to build various buildings or structures such as houses, factories, roads, and embankments on soft grounds such as rivers, lakes and swamps, the construction of reinforcing the strength of soft grounds by discharging moisture contained in the soft grounds to the ground must be preceded. By doing so, the stability of buildings or structures to be built afterwards can be ensured. Looking at the water removal method carried out for construction work on land containing considerable amounts of water, such as soft ground, as follows.

The oldest water removal method is to excavate the ground to make a cylindrical drill hole, and then fill the inside with sand with excellent absorbency, so that the water contained in the ground is discharged by capillary action along the sand column. For example, since the efficiency is very low, it is rarely used in recent years, and nowadays, it is common to use a plate drain board or a perforated tube formed through a pipe wall through a plurality of through holes penetrating the inner and outer circumferential surfaces. As follows.

As shown in FIG. 1, the drain board 1 has a plate body 11 such that a plurality of valleys, that is, drainage grooves D, are formed along the longitudinal direction on both sides of the plate body 11 having a rectangular shape. It is a structure in which a plurality of plate-shaped ribs 12 are parallel to each other from the upper end portion to the lower end portion of which the length is relatively longer than the height, and the outer surface is embedded in the soil with the outer surface wrapped with a filtering member 2 such as a nonwoven fabric.

Therefore, when the drain board 1 is vertically embedded in the soil, as shown in FIG. 2, only moisture contained in the soil passes through the filtering member 2 to move toward the plate body 11. This water rises along the drain groove D formed between the rib 12 and the rib 12 by capillary action, and is discharged to the ground surface through the upper end of the drain board 1.

However, the ground subsides as the moisture contained in the soil is discharged, and the sinking ground strongly presses both sides of the drain board 1, so that the filtration member 2 is provided with the ribs 12 and the plate ( 11) while close to the recessed side, the drainage groove D between the rib 12 and the rib 12 is extremely small, or in severe cases, almost disappears.

That is, as the drainage groove D is reduced or disappeared, the drainage performance of the drain board 1 is drastically lowered, or the drainage performance cannot be exhibited at all.

In addition, since the plate body 11 of the drain board 1 has a structure in which a plurality of ribs 12 are erected in parallel on both sides thereof in the longitudinal direction, the widthwise bending deformation resistance is sufficient, but the longitudinal bending deformation resistance is sufficient. Because of this small size, the plate body 11 can be easily bent even with a small force along the longitudinal direction, and the plate body 11 may be dried or crushed by earth pressure, thereby making it impossible to form the drain groove.

Therefore, in order to solve the problem of the conventional single drain board having a single sheet as described above, by changing the use of the two drain boards in the overlapping state of the double drain board, the problem that the single drain board has been solved, but as follows. The same new problem arose.

In other words, by overlapping a single drain board, a new drain groove is formed between opposite surfaces of the two single drain boards, and a plurality of holes must be formed in each single drain board so that moisture can flow into the drain groove from the outside. there is a problem.

However, at present, the through holes penetrating the single drain board are formed by the punching method using the upper and lower molds, and the excessively long time for forming the holes causes the manufacturing productivity of the double drain board to be excessively reduced, thereby manufacturing There is a problem that costs are higher than necessary.

The present invention has been made to solve the problems of the conventional method for manufacturing a double drain board that can solve the shortcomings of the single drain board used to remove the moisture of the soft ground, formed into a plate shape By simplifying the formation of a plurality of through holes without degrading the feed rate of the single drain board during the feeding process of the single drain board, it provides a method to dramatically increase the manufacturing productivity of the double drain board and significantly reduce the manufacturing cost. There is an object of the present invention.

The said object of this invention is achieved by the shaping | molding roller or shaping | molding die which gives the structure which a drain board has to the extruded strip-shaped extrusion material.

According to the present invention, a method of manufacturing a double drain board includes inserting one side of a drain board into the other side when molding a strip-shaped synthetic resin extruded material that is extruded and then transported with a moldable heat into a single drain board structure. Technical features of the present invention to form the through-holes on the other side together.

The production method of the present invention as described above, largely, the step of continuously extruding the synthetic resin into a strip shape; A molding step of projecting and forming a plurality of ribs and through-holes on both sides of the extruded material on the strip, respectively; Cutting and removing the through protrusions; Cutting the extruded material into which the single drain board structure is formed to an appropriate length; After forming the extrusion material, that is, the sequential process, such as the step of overlapping two sheets of a single drain board, the forming step with the technical features of the present invention, and the cut-off step of the through-hole projections formed in the forming step Same as

The step of forming ribs and through-holes on both sides of the extruded material may include forming a synthetic resin extruded material having a heat that can be formed after extrusion, along a longitudinal direction on both sides of a single drain board structure, that is, a strip-shaped extruded material. This is a process of forming a plurality of ribs standing upright in parallel respectively.

At this time, parallel ribs are formed at the same time, a plurality of grooves are formed at regular intervals along the longitudinal direction between the ribs and the ribs on one side, each groove is not formed within the thickness range of the extruded material, extruded material It is formed to protrude from one side of the other side.

That is, the protrusions formed on the other side by the grooves formed in the way from one side to the other side are projections for through-holes.

The inside of the through hole projection of the other surface of the extruded material formed in the above manner is a groove of one side formed from one side to the other side, and this groove forms an internal space that is opened in one side direction from the other side. By cutting and removing the through projections, the grooves, which were opened only in one direction, open in both directions, thereby changing to the through holes penetrating the extruded material.

That is, in this step, a plurality of ribs and grooves and a plurality of ribs and through-holes are formed on both sides of the extruded material, respectively, and the ribs, the protrusions and the grooves are formed on a cylindrical upper and lower forming roller or a plurality of molds. When the forming roller is used, each outer circumferential surface of the two forming rollers has a structure in which grooves and protrusions in opposite directions are formed so that each surface and cross section of the extruded material having ribs, grooves, and projections can be joined together. Will have

In the case of using a plurality of molds, each of the plurality of molds is repeatedly rotated along a pair of endless tracks facing each other, and the opposite sides between the molds between the plurality of pairs of dies facing and running along the endless tracks. The ribs, protrusions and grooves are formed on both sides of the extruded material by the bar. The opposing surface structures of the opposing molds are the same as those of the outer peripheral surfaces of the two forming rollers, but the molding roller method in terms of productivity, and the mold in terms of formability. The way is advantageous.

That is, the molding roller system can easily increase the rotational speed of the molding roller because the extruded material on the strip is to pass between a pair of rotating rollers, but the moldability may be deteriorated because the passing time of the extruded material is short.

On the other hand, the mold method has a limitation in increasing the moving speed of the mold because the mold is formed in a state in which a plurality of molds are in close contact with each other so that they move along the caterpillar, but the contact time between the extruded material and the mold is long. Advantageously, one of two methods can be chosen depending on the circumstances.

The step of removing the through projections is a process of cutting and removing the through projections formed on the other side of the extruded material which continues after the molding is completed. The extruded material is fixed while the cutting knife is fixed between the ribs and the ribs on the other side of the extruded material. It is done in such a way as to proceed.

That is, by advancing the extruded material in a state in which the cutting knife is in contact with or in proximity to the other side, the through-protrusion projections that progress by heat are simply cut in order while sequentially meeting the cutting knife.

Details of the effects and the resulting effects, including the object and technical configuration of the present invention will be clearly understood by the following description with reference to the drawings showing a preferred embodiment of the present invention.

3 is a process block diagram of the method for manufacturing a double drain board of the present invention, a cross-sectional view of the extruded material before and after molding in FIG. 4, a front view of the forming roller in FIG. 5, and a plurality of molding dies in FIG. A schematic plan view and a front view of a forming apparatus moving along a track, a schematic diagram showing a method of cutting through holes in FIG. 7, and a cross-sectional view of a single drain board and a double drain board in FIG. 8, respectively.

As shown, the manufacturing method of the double drain board of the present invention,

Continuously extruding the synthetic resin into strips (100);

A plurality of ribs L, which are erected in parallel with each other on both sides of the strip-like extruded material 41, are formed in the longitudinal direction, respectively, and a plurality of the ribs L and the ribs L on one side thereof in the longitudinal direction. Forming a groove (G) of the forming step for protruding the projection (E) for the hole between the rib (L) and the rib (L) of the other side corresponding to each groove;

Cutting and removing the through holes (E) (300);

Cutting 400 the extruded material 41 into which the single drain board structure is formed to an appropriate length;

It consists of sequential processes such as the step 500 of forming a double drain board 82 by overlapping two sheets of a single drain board 81 which is an extruded material cut after molding.

At this time, the forming step 200, as shown in Figure 5, is carried out by a rolling method using a pair of cylindrical forming roller (R) having an outer circumferential surface respectively joined to both sides of a single drain board 81. As shown in FIG. 6, a molding apparatus in which a plurality of molds M having opposing surfaces S, which are respectively joined to both surfaces of a single drain board 81, are coupled to orbit along the caterpillar ( It may also be made by the compression method by 61).

Then, the through-hole projections (E) formed in the forming step 200, as shown in Figure 7, the extrusion material by a plurality of cutting knife (K) fixed in contact or close to the other side of the extrusion material (41) By cutting away during the movement of 41, the through-holes H are formed.

As described above, in the method of manufacturing the double drain board of the present invention, not only the drain board structure is formed during the progress of the strip-shaped extruded material, but also the cutting knife fixed during the transfer of the extruded material after the projections for forming the through holes are formed together. Since the projections are automatically removed simply by forming a through hole, the productivity of the manufacturing of the double drain board is greatly improved, and thus, the manufacturing cost can be reduced, thereby increasing the product competitiveness.

Claims (3)

Extruding the synthetic resin into strips (100); Shaping both sides of the extruded material 41 having a strip shape (200); Cutting and removing 300 through-holes (E) formed in the forming step (200); Cutting 400 the extruded material 41 into which the single drain board structure is formed to an appropriate length; Method of manufacturing a double drain board, characterized in that it comprises a step (500) of superimposing two sheets of a single drain board (81) that is an extruded material cut after molding. The method of claim 1, wherein the forming step 200, a plurality of ribs (L) parallel to each other on both sides of the extruded material (41) formed in the longitudinal direction, respectively, the ribs (L) and ribs (one side) Forming a plurality of grooves (G) in the longitudinal direction between the L), characterized in that the step of protruding through the projection (E) through the ribs (L) and ribs (L) of the other side corresponding to each groove. The manufacturing method of the double drain board made into. The method of claim 1, wherein the forming step 200 is a rolling method using a pair of forming rollers (R) or a plurality of molds (M) by pressing the molding apparatus combined to rotate along the caterpillar track Method of manufacturing a double drain board, characterized in that carried out in any one of the manner.

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