KR20070093280A - The manufacturing method of corrugated pipe - Google Patents

Abstract

A spiral corrugated and perforated pipe manufacturing method using a corrugator is provided to prevent the decrease of productivity and defects generated in forming a perforated pipe with rotating a mandrel. In a spiral corrugated and perforated pipe manufacturing method using a corrugator and a forming apparatus, plural mold members are rotated along an endless track and are combined with or separated from a plate of the corrugator installed in the front side of an extrusion die and an extrusion die nozzle(2). A pair of molds(3) having helixes on the outer peripheral surface is disposed in the corrugator and provided with a sealing bar(10) blocking the compressed air. A spiral uneven corrugated pipe(1) is molded by equally applying forming materials in the mold by high air pressure. Rollers(12) are disposed at the upper and lower sides and the left and right sides of the end of the corrugator to draw out the molded spiral uneven corrugated pipe from the mold easily, and vertically and horizontally regulated. A boring projection is formed on the outer concave part of the spiral uneven corrugated pipe by forming a projection unit on the mold. A guide(13) and a boring blade cylinder(14) rotated along the spiral uneven gullies are integrally combined at the outer side of the spiral uneven corrugated pipe. The boring projection is cut by a boring blade fixed on the boring blade cylinder.

Description

The manufacturing method of corrugated pipe using a corrugator

1 is a simplified manufacturing process diagram of the spiral uneven corrugated perforated tube produced by the present invention.

Figure 2 is a cross-sectional view of the die-casting punching projection molding of the present invention.

Figure 3 is a structural diagram of a guide and a punch knife bundle applied to the present invention.

4 is a structural diagram of a drilling knife applied to FIG.

5 is a structural diagram in which a spiral corrugated concave-convex tube formed on a corrugator according to the present invention is separated by a roller.

Figure 6 is a detailed view of the spiral corrugated pipe projections.

Figure 7 is a cutaway view of the guide cutting and drilling knife bundle of the present invention.

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

       1. Spiral uneven corrugated pipe 1a. Perforation

       2. Die nozzle 3. Mold

       4. Mold member 5. Protrusion

       6. Cooling tank 7. Draw roller

       8. Nonwoven 9. Nonwoven Fitting

      10. Sealing bar 11. Sealing for compressed air blocking

      12. Push roller 13. Guide

      13a. Tom 14. Punched Knife Bundle

      A. Spiral uneven corrugated perforated tube

The present invention relates to a method of manufacturing a spiral uneven corrugated perforated tube applied to reinforce the ground in a low humidity solution, soft ground region, dredging region, etc. More specifically, the spiral is molded and cooled through a mold embedded in the corrugator The guide is rotated along the spiral bone on the outer axis of the uneven corrugated perforated tube, and a bundle of perforated knives is placed at the back of the guide to be integrated with the guide. By cutting, the hole is drilled, and the surface of the perforated spiral uneven corrugated pipe can be covered with non-woven fabrics, minimizing production speed and defect rate, and by using various kinds of synthetic resins, which can improve productivity and reduce costs. Corrugated as an economical production method The present invention provides a method for producing a spirally rugged corrugated perforated tube using data.

Generally, in order to reinforce the ground in low humidity, soft ground, dredging areas, etc., the perforated pipes are drilled in the ground at regular intervals so that the water in the ground can be drained smoothly. Doing.

The spiral perforated tube as described above is at least on the inner circumferential surface of the spiral tube through which the synthetic resin in the liquid is extruded by a compression molding machine and rotated out of the extrusion die through a mandrel forming machine, whereby a spiral tube is formed and the spiral tube is cold-molded and transferred to one end of the mandrel. Spiral perforated tube was developed to form a perforated tube by the rotation of a cutting tool equipped with one or more cutting blades, disclosed in Korean Utility Model No. 0351329 "Spiral Perforated Tube Forming Machine."

However, in the manufacturing method described above, the spiral mold located in the mandrel is vacuumed while the mandrel is rotated, and a cooling passage is formed in which the cooling water is circulated only in the side of the spiral tube forming portion. There was no problem that the heat remaining in the spiral tube is not completely cooled, so the molding speed is slow and the temperature of the cooling water is 4 ° C., so that 5 mm / min is produced.

In addition, since the PE synthetic resin used as the main raw material is molded only by using a material having good stretchability, the production cost is high due to the use of a high cost resin.

Accordingly, the present invention was devised to solve all the disadvantages and problems raised in the conventional spiral perforated tube forming machine, and is formed on the outer circumferential surface spiral of the spiral concave-convex perforated tube which is formed and cooled through a mold embedded in the corrugator from the extrusion die. Forming protrusions at regular intervals, guided along the spiral bones and a bundle of perforated knives integrated with the guide, and rotated by power to cut the protrusions so that the hole is perforated to form a perforated tube In addition, the purpose of the present invention is to provide an economically beneficial spiral uneven corrugated hole tube forming machine and a manufacturing method by improving the production speed of the hollow tube, minimizing defects, and producing the raw material regardless of using only expensive raw materials.

The present invention has a structure in which several mold members (4) are combined and separated in an endless track on an extruder extruded molten synthetic resin and an extruded die into which a liquid synthetic resin is injected and an extruded die nozzle (2). By arranging a pair of molds (3), the liquid molding material is evenly applied to the inside of the mold by the air pressure of the compressed air, thereby forming the spiral concavo-convex corrugated tube, and the concave-convex corrugated formed by the spiral when the formed spiral concave-convex corrugated tube is drawn out In order to prevent spiral concave-convex wrinkles from being removed from the mold and prevent them from coming out comfortably due to the horizontally moving mold, the rollers are positioned up, down, left, and right at the end of the corrugator, and the upper and lower left and right sides are adjusted properly to press the spiral concave-convex wrinkles. After having been easily withdrawn, the spiral uneven corrugated pipe passes between the cooling furnace 6 and the withdrawal roller 7. In continuously manufacturing spiral concave-convex corrugated pipes, a protrusion is formed in the mold member 4 so that a perforation protrusion 1a is formed in a concave-convex outer concave portion of the spiral concave-convex pipe, and a spiral outside the spiral concave-convex corrugated pipe cooled by a cooling furnace The guide is rotated along the concave-convex bone, and the perforated protrusion 1a is cut by the perforated knife 12 fixed to the perforated knife bundle 11 which is integrally rotated with the guide to manufacture the spiral concave-convex corrugated pipe. Then, the surface of the perforated tube is covered with a nonwoven fabric and bonded to produce a non-woven spiral uneven corrugated perforated tube.

As described above, the present invention is a spiral uneven corrugated pipe forming machine using a corrugator that can improve productivity problems caused by rotating the mandrel while forming a spiral uneven corrugated pipe. It has the advantage of being able to use poor, low cost raw materials.

Claims (1)

Extrusion die and extrusion die nozzles (2) In front of the several mold members (4) is rotated in an infinite orbit, the pair of molds (3) of the outer circumferential surface spirals in a corrugator to be combined and separated to prevent compressed air A sealing bar is installed and the molding material is applied evenly inside the mold by high air pressure to form a spiral corrugated pipe, and the rollers are positioned up, down, left and right at the end of the corrugator so that the formed spiral uneven corrugated pipe can be easily drawn out from the mold. To adjust the left and right, forming a projection on the mold (3) to form a perforation projection (1a) in the outer concave portion of the spiral corrugated pipe, the guide and the punch knife bundle rotated along the spiral concave bone on the outer side of the spiral corrugated pipe Method for producing spiral concave-convex corrugated perforated tube which is integrally coupled and the perforating protrusion 1a is cut by the perforating knife 12 fixed to the perforating knife bundle 11 And molding machine. [Claim 2]      2. The spiral uneven corrugated pipe forming machine according to claim 1, wherein the sealing bar which prevents the compressed air from leaking is made of a synthetic resin material having a spiral structure. [Claim 3]      The spiral concave-convex corrugated pipe forming machine according to claim 1, further comprising a device for adjusting the pressing degree of the spirally concave-convex corrugated pipes positioned up, down, left, and right at the end of the corrugator. [Claim 4] The spiral concave-convex corrugated pipe forming machine according to claim 1, wherein the plurality of punching knives fixed to the punching knife bundle are separable. [ Claim 5 ] According to claim 1, Spiral irregularities corrugated pipe forming machine, characterized in that the guide is rotated along the spiral concave and convex knives bundle is rotated by the power and the rotation speed is controlled

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