JPS60141500A - Continuous manufacture of bored synthetic resin pipe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for continuous production of perforated synthetic resin pipes, particularly culvert drainage pipes.

In civil engineering work that involves embankment, backfilling, etc., so-called culvert drainage works are constructed at the same time to create water passages in the soil and to ensure smooth drainage of water. This culvert drainage construction method often involves burying a pipe in the soil with numerous holes in the surrounding wall, and allowing water that enters through the holes to drain through the pipe to the outside. . Synthetic resin corrugated pipes are widely used because such underdrainage pipes can be produced in large quantities at low cost, have no fear of rust, and have sufficient buckling strength against earth pressure. It is used. This corrugated pipe is extruded and molded onto the inner wall of a molding frame, which has regular irregularities.
The molded frame is made into a mold block so that the pipe is continuously threaded, and the through holes are appropriately sealed from the outside of the pipe by punching with a punch-type cutter after the molding. However, in this method of drilling holes, the cutter punches out in the direction of the center of the pipe, so the cut sections remain inside the pipe, especially in corrugated pipes with uneven pipe walls. It is difficult to completely extract these fragments, and if they are buried as they are, the remaining fragments may cause blockage of waterways or block the through holes, significantly reducing the intended drainage function. Therefore, drastic improvements were strongly desired.

The present invention has been made in view of the above, and when the through hole is completely drilled, the cut section is removed from the pipe by applying an outward i3 tube from the inside of the molded pipe and at the same time suctioning it from the outside. The purpose is to eliminate the above problem by quickly removing it without leaving it in the interior of the body.

Embodiments of the present invention will be described with reference to the accompanying drawings. Figure 1 is a vertical cross-sectional view of the main part 1 showing an example of the apparatus adopted in the method of the present invention, and Figure 2 is an enlarged view of the part marked with ■ in Figure 1. be. That is, the present invention provides a method for manufacturing a synthetic resin pipe 3 in which a thermoplastic synthetic resin 30 is continuously extruded from an extrusion nozzle l along a mold 2. A punch-type cutter 4 that acts from the inside to the outside against the pipe wall of the synthetic resin pipe 3 is disposed, and a drive means 5 that operates the dazzling cutter 4 intermittently. A cylindrical cutter guide 6 capable of receiving the cutter 4 is disposed on the outside of the synthetic resin pipe 3 at a portion corresponding to the cutter 4. By connecting the inside of the cutter guide 6 to a suction device 7 outside the system, the cutter 4 is operated intermittently in cooperation with the continuous molding of the synthetic resin pipe 3, thereby forming the pipe 3. Successive through holes 31 in the pipe wall...
32 sections were completely drilled and excised...? cutter guide 6
...This is a continuous manufacturing method for a perforated synthetic resin pipe, characterized in that the entire pipe is suctioned and removed. 1st
The figure shows a continuous corrugate pipe manufacturing device in which a plurality of mold blocks 2... are assembled into two endless block assemblies 2 (1, 20), and the assembly process 20 A molding zone 200 is formed in which both are run under the 20i cooperation regulation and are opposed within a certain range, and the thermoplastic synthetic resin extrusion nozzle 1 inserted into the molding zone 200 produces a heat-softened material. Synthesis 49 (expand the fat pipe in the centrifugal direction with compressed air pressure, and
It is made of corrugated pipes continuously up to N 1717. That is, the extrusion nozzle 1 (introduced from outside the system (indicated by O in the figure))
'r) The annular curved path 11 for the resin 30, and the compressed air i introduced into it from outside the system (indicated by ■ in the figure).
A rod [3] is integrally held in the fA nozzle l, and in front of it, a rod [3] is integrally held by the fA nozzle l.
%, the resin pipe is expanded in the centrifugal direction within the space between '/17 up to the frame body 131C by the compressed air forced in from the air supply passage 12, and the small diameter part and the large diameter part are alternately given energy. The corrugated pipe 3 is continuously formed as the block assembly 20.20 moves in the direction a. A through hole 81 is bored at the outlet of the molding zone 200 of the three corrugated pipes, which will be described in detail below with reference to FIG. 2.

At the tip of the stopper 18, two holding members 40 for the cutter 4 are fixed at positions 180° from each other, and the holding members 40.40 are biased toward the center by springs 41.41. The punch-type cutters 4, 4 are loaded,
The cutting edge of the cutter 4.4 is located close to the inner wall of the small diameter portion of the corrugated pipe 3. In addition, the driving means 5 for operating the cutter 4.4 in the centrifugal direction includes a piston cylinder 5 arranged in series along the axis Fta Lτ of the nozzle 1.
It is composed of a 1° rod 52 and a conical actuator 53. The cylinder 51 is disposed outside the base of the nozzle 1, and a rod 52 connected to the cylinder 51 passes through the entire axis of the nozzle 1, and also passes through the core of the plug body 13, and gradually extends forward at its tip. Expanded diameter conical actuator 5
It is connected to 3.

The actuator 53 receives the notch of the cutter 4.4 on its tapered surface, and the two are brought into elastic contact by the elasticity of the springs 41.4. On the other hand, on the outside of the Kolgut vipe 3, a cylindrical cutter guide 6 is disposed at a portion corresponding to the cutters 4, 4. As will be described later, the cutter guide 6... is moved in the centrifugal direction, and when its cutting edge breaks through the wall of the corrugated pipe 3, it is always brought close to the outer wall of the small diameter portion of the corrugated pipe 3 to receive it. In reality, since the corrugated pipe 3 travels in its axial direction at a constant speed, it is impossible to fix the cutter guide 6 at this position. Therefore, as shown in FIG. The l/lJ of the sprocket wheel meshing with the sprocket wheel, the rotating body 60.60, which has several guides 6 arranged radially with equally spaced cotton. i0P,
is achieved. That is, in conjunction with the running of the rotary bodies 60, 60 corrugated pipes 3, the cutters 4, 4
The rotating body 60.601 is set to be close to the outer wall of the small diameter part of the corrugated pipe 3 so that one of the guides 6... is sure to receive the guide 11-+i which moves in the centrifugal direction. Till shaft suction tube 70.7
0, and is rotated 17 under the above-mentioned restrictions by a moving device (as shown in the figure). This suction tube 7
0.7 (lI) The rotating body port 60.60 functions as a support shaft J, and the inside of the pipe has an intake lower 1.7
1 is opened, and the section 32 of the pipe 3 cut out by the operation of the cutter 4.4...the entire guide 6...the inside is
It functions as a jjO path for sucking in +D and removing it by the intake device 7. J-fold,
] The drilling of the hole 31 is done by the operation of the drive means 5, but if the cylinder 51 is intermittently expanded and contracted at appropriate intervals as the corrugated pipe 30 runs, it is possible to , the actuator 53 moves forward and backward along its axis. When the actuating element 53 retreats, that is, when the cling 51 retracts, the cutters 4, 4 are moved by the action of the tapered surface of the actuating element 113 against the spring 41.4.
The cutting edge is pushed in the centrifugal direction against the elasticity of the corrugated pipe 3, and the cutting edge penetrates the wall of the small diameter portion of the corrugated pipe 3 to form a desired through hole 31... and is received in the cutter guide 6... The sections 82 excised at this time pass through the cutter guide 6 and are successively removed by the suction device 7. When the cylinder 51 expands and the actuator 5B is pushed forward, the cutters 4, 4 return to their original positions due to the elasticity of the springs 41 and 41, and wait until the next drilling point for the corrugated pipe 3 is reached. By repeating this operation, the through holes 31 are successively drilled as the corrugated pipe 3 travels. 1 Hideko 31...
The location and individual characteristics of the buds are selected as appropriate depending on the purpose of use, and therefore the interval between the expansion and contraction movements of the cylinder 51, the distance between the cutter guides 6... or the length of the cutters 4, 4, etc. and the mutual angle etc. are selected as appropriate.

The spring 521 fitted on the rod 52 always urges the rod 52 forward, thereby causing the cutters 4, 4 to quickly retreat after completing the drilling work, so as not to impede the continuous running of the corrugated pipe 3. It is functional.

In the corrugated pipe manufacturing apparatus having the above configuration, the punch-type cutter 4.4 is operated from the inside to the outside in cooperation with the movement of the corrugated pipe 3 after the molding, and the cut sections 32... are guided by the cutter. 6...The section 8 is removed by suction using the all-through suction device 7.
2... will not remain in the pipe 3. Therefore,
There is no need to worry about the fragments being buried underground and clogging waterways, as was the case in the past.

Although the example of application to a corrugated pipe production apparatus has been described above, it is obvious that the ordinary perforated composite 41't can also be applied to the production of fat pipes. In this case, it is obvious from the above description that each of the cutter guides 6 may be of a stationary type. also,
The driving means 5 uses a piston cylinder 51 that expands and contracts along the axial direction of the nozzle 1 as its driving source, but a rotary body such as a motor is used as the 'WK driving source, and the power is intermittently transmitted to the cutter 4 by a cam. .

As shown in Section 1.R, the method of the present invention, when drilling a through hole in a synthetic i+-11j7 pipe, orients the direction of movement of the cutter with respect to the pipe wall from the inside to the outside, and the cut section is completely cut. By then removing the section by suction, it is completely prevented that the section remains within the 5 mm area, which simplifies the manufacturing process of such a vibrator and also eliminates the need for various uses. I! Troubles at T are significantly reduced! L. In addition, the previous IK
Adding a little improvement to 'j construction'-i"j li"'1"7
Since the present invention can be achieved by doing so, it is efficient and the value of the present invention is extremely large if these 111 steps are eliminated.

[Brief explanation of drawings]

Figure 1 i-1 The method of the present invention uses 11 pieces! Figure 2 shows an example of a device with a length of tTB of 1 inch.
:f; ] This is an enlarged view of the line section in Figure II. (Icho υ, i 吃明) 1... Extrusion nozzle, 2... Formwork, 3... Imanari Tsukiyuki pipe, 30... Thermoplastic synthetic resin, 4. Punch type cutter, 5 ...j throat fltl, 1 means, 6... cutter guide, 7... suction device. One or more applicants Kukiron Matching Association 1

Claims (1)

[Claims] 1. In a method for manufacturing synthetic resin pipes in which several thermoplastic synthetic resins are continuously extruded from an extrusion nozzle, in front of the extrusion nozzle, a tube wall of the molded synthetic resin pipe is injected from the inside to the outside. A punch-type cutter that acts in the same direction is disposed, and a driving means for intermittently operating the cutter is provided coaxially with the extrusion nozzle, while a portion corresponding to the cutter is provided on the outside of the synthetic resin pipe described in 6iJ. A cylindrical cutter guide capable of receiving a cutter is provided, and
When the inside of the cutter guide is connected to a suction device outside the system, the cutter is operated intermittently in cooperation with the continuous extrusion molding of the synthetic resin pipe to successively drill through holes in the wall of the pipe. A continuous manufacturing method for a perforated synthetic resin pipe, characterized in that the cut section is passed through a cutter guide and removed by suction.