JPS59150733A - Manufacture of synthetic resin-made corrugated pipe having cylindrical part - Google Patents

Abstract

PURPOSE:To form a cylindrical part at an appropriate location by a method wherein, when a tape-like material and a linear material both in a semi-molten state are wound around a core to fabricate a corrugated pipe, those tape-like and linear materials are pressed by a roller to be flat. CONSTITUTION:A tape-like material 16 and a linear material 17 are supplied from a supply unit 14 to a rotating core 13 to be wound around it, to thereby form a corrugated pipe part 11. After forming the corrugated pipe part of a required length, a cylinder unit 20 is extended so that a roller 18 is pushed against both the tape-like material 16 and the linear material 17 still in a semi-molten state just after winding thereof around the core 13, thus squeezing both materials to form a cylindrical part 12. After forming the cylindrical part of a required length, the roller 18 is again spaced from the core 13 to form the corrugated pipe part again. By properly cutting at a position in the cylindrical part 12, it becomes possible to obtain the corrugated pipe 10 having the cylindrical part 12 at both end thereof for connection.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a synthetic resin corrugated tube having a cylindrical portion.

As a manufacturing method for synthetic resin corrugated pipes, a semi-molten tape-like material and a separately manufactured linear material are supplied around the outer circumference of a core metal, and while being wound around the outer periphery of the core metal, the wound portion is oriented in the axial direction. Methods for moving the target have been known for a long time.

By the way, in order to connect the corrugated tube manufactured in this way to other equipment, etc., as shown in FIG. The mating threaded part (2a
), it was necessary to screw in a connector (2) having a cylindrical part (2b) for joining at the other end. This is because this type of corrugated pipe (1) has a spiral protrusion.
This is because even if the connector is inserted into a connector and the outer periphery is tightened with a hose band or the like, a continuous spiral non-adhesive part will be created inside the pipe. Therefore, an extra connector 2) is required, and it takes time and effort to assemble it, and the airtightness cannot be maintained unless adhesive is applied to the threaded part of the corrugated tube (1) and the connector (1). If it was made of polyethylene, there were problems such as the lack of an effective adhesive.

In view of the above-mentioned conventional problems, an object of the present invention is to provide a method for manufacturing a synthetic resin corrugated pipe having a cylindrical part that can be integrally formed at an arbitrary position during manufacturing of the corrugated pipe. do.

For this reason, the present invention supplies a semi-molten tape material and a wire material to the outer periphery of a core metal, and while winding the material around the outer periphery of the core metal, moves the wound portion in the axial direction to form a corrugated tube. By pressing the tape-shaped material and the linear material, which are still in a semi-molten state immediately after being wrapped around the core metal, with a roller at an arbitrary time to crush the spiral protruding part and make it uniform in thickness, Provided is a method for manufacturing a corrugated resin pipe having a cylindrical portion formed at an arbitrary position.

Hereinafter, one embodiment of the present invention will be described based on the drawings. FIG. 2 shows a corrugated tube αG manufactured by the production method according to the present invention, in which a cylindrical portion (121) is integrally formed at the end of the corrugated tube portion dll. After fitting a hose band or the like around the outer circumference of the cylindrical part (121), insert this cylindrical part into a hose nipple (not shown) of the connecting device, and tighten the hose band to make a completely airtight connection. can.

An example of a method for manufacturing a corrugated pipe αO having such a cylindrical portion will be explained with reference to FIGS. 3 to 6. CIBI is a round shaft-shaped core metal that rotates on a fixed axis and moves in the axial direction.Things of appropriate length are sequentially connected at one end in the axial direction and separated one after another at the other end in the axial direction. It is constructed so that the water is refluxed to one end side. As shown in the separated state in Figure 3, the connection part (13a) of each core metal port 3) concentrically connects the core metal αB) and transmits forces in the axial and rotational directions. It is structured in such a way that it can be obtained. In addition, as a method of moving the core metal 03) in the axial direction while rotating it,
) is easiest to rotate by hanging a belt (not shown) diagonally on it. 6 is a feeding device for synthetic resin material placed on one side of the rotation axis of the core metal mouth S), and the die at the tip (15 membranes) is in a semi-molten state as shown in Figure 6. The tape-like material α6) and the linear material (17) are connected to the core metal (1B
) to the outer periphery of the
As shown in the figure, a corrugated tube portion αυ in which a spiral protruding portion is formed is formed from the linear material aη. (18) is core metal 0
The axis of 81 is a roller that can freely rotate around an axis parallel to y, and can be switched between a state where it is pressed and biased so as to press against the outer periphery of the core bar (IB) and a state where it is separated from the outer periphery of the core bar (IB). The tape-shaped material αG) and the linear material (17
) is arranged near the position where the winding starts around the core metal a8t. After forming the corrugated tube part to the required length as shown in Fig. 3, when forming a cylindrical tone, the cylinder device (2o) is extended as shown in Fig. 4, and the roller Q
81 is pressed onto the tape-like material <163 and the linear material (17), which are still in a semi-molten state immediately after being wound around the core bar 081, to crush them to form a cylindrical portion (top) of the required length. After forming the cylindrical part, it is re-coated.08)
By separating the core metal α8], the corrugated pipe part Qll
is formed. Therefore, by extending the cylinder device (rotation) for a certain period of time at certain time intervals, it is possible to continuously manufacture pipes having a predetermined length of corrugated pipe part α1) and cylindrical tone alternately. By appropriately cutting at the position, a corrugated tube aO having a cylindrical portion for connection at the end can be obtained as shown in Figure @2.

In the above embodiment, as shown in FIG.
) The die CL5+ is used to supply the linear material αη from the lower position, and as shown in FIG. However, even when manufacturing a similar corrugated tube part α11, the seventh
As shown in Figure (a), a die LFj is configured to integrally supply a linear material <171 to the bottom surface of a tape-like material (16).
L)' or a die (151) in which the linear material (17) is positioned above the tape-like material (16] in the direction of movement of the core metal and fed as shown in FIG. 7(b)) etc. can also be used. In addition, as shown in FIG. 8, when manufacturing a corrugated pipe part (ita) in which the linear material Q7) is sandwiched between the tape-like materials 061 or exposed on the outer wall surface of the pipe, the 9th As shown in the figure, the die (15) is configured to feed the linear material Q7) from the upper position of the tape-like material α6, and the upper surface of the tape-like material α6 as shown in FIG. A die (1%) that integrates and supplies the linear material α7), and a die that feeds the linear material
7+ in the direction of movement of the core metal than the tape-like material (16) I
It is sufficient to use a die (158) or the like which is positioned and supplied.

Furthermore, in the above embodiment, a case was explained in which a round shaft-shaped core metal 03) that moves in the axial direction while rotating is used as the core metal, but as shown in FIG. A large number of cylindrical rotors (2B) or spindles (2B) are arranged in multiple rows with a fixed twist angle relative to the axial direction by a holding member (2B). 2) is formed of a magnet, and the spindle (next) is connected to a rotational drive device (2),
A core metal (zll is used, and synthetic resin material feeder No. 0 is placed on one side of the core metal i21!) which is rotated at step 1, and a tape-shaped material α6 is placed from the die (15) at the tip of the core metal (zll).
) and the linear material (b) on the core metal (rotor (4) of 21) in the axial direction of the supply table (z1!), the corrugated tube part Qll can also be manufactured; in this case, When forming the cylindrical portion (121), the roller α8 may be pressed against the core metal 121, that is, the rotor, as in the previous embodiment.

In addition, the axis of the roller (to) is the core metal Q91 or (21
There is practically no problem even if the material is completely parallel to the axis of the core, but if the material is wrapped around the core bar at an angle corresponding to the corner, a smoother cylindrical shape can be obtained. preferable.

According to the method of manufacturing a corrugated tube having a cylindrical portion of the present invention, as is clear from the above description, the spiral protruding portion of the material in a semi-molten state is crushed by a roller when the corrugated tube is assembled. A corrugated pipe with an integral cylindrical part can be obtained by a simple method, and therefore there is no need for extra parts or processing effort unlike in the past, and there are no problems with airtightness, etc. Demonstrates the effect of

[Brief explanation of the drawing]

Fig. 1 is a partial cross-sectional view showing a connecting cylindrical part of a conventional corrugated pipe, Figs. 2 to 6 show an embodiment of the present invention, and Fig. 2 shows a cylindrical part of a manufactured corrugated pipe. A front view, FIG. 3 is a plan view showing the manufacturing process of the corrugated tube part, FIG. 4 is a plan view showing the manufacturing process of the cylindrical part, and FIG. 5 is a vertical cross-sectional view of the corrugated tube part. 1△ - Front view of the die of the material supply device seen from the A line, Fig. 7 (
a) (b) is a front view similar to FIG. i6 showing a modified example of the die, and FIG.
9 and 10 (13 is a front view similar to FIG. 6 showing the shape of the die for manufacturing the same corrugated tube section, and FIG. 811 is a plan view showing the manufacturing process of the corrugated tube section according to another embodiment. It is a figure. α1 is a corrugated pipe, Qll is a corrugated pipe part, (121 is a cylindrical part,
Q81 (3) 1 is the core metal, (1 is the feeding device, α6) Fi
Tape-shaped material, q7) is a linear material, (direction is roller. Patent applicant's representative ratio Figure 1, 4N11 Figure Special Sho 59-150733 (4) Figure 3 Figure 6 Lil lei) 7 Procedure amendment ( (@) March 29, 1980 1 Display of the case 1988 Patent Application No. 25801 2 Name of the invention Manufacturing method of plastic corrugated molding having the same cylindrical portion 3 Relationship with the person making the amendment Patent Applicant Address: 7-2-2b Deto, Nagayoshi, Hirano-ku, Osaka Name: Echeiya Higashi Co., Ltd. (Name) 4 Agent: Month, Day, Showa (Date of dispatch: Showa)
6. Claims of the specification subject to amendment and detailed description of the invention - r
\(1) Amend the claims in the specification as shown in the attached sheet. , Q) On page 3 of the specification, lines 1 to 4, the phrase ``At any time... ■ Crushing'' was replaced with ``At any time, the semi-molten tape-like material and the linear "Press the material with a roller to make it flat." (3) In the second and third lines of page #L8 of the specification, the phrase “Spiral shape of the material...O...press” has been replaced with “Press the tape-like material and the linear material with a roller. Corrected to be flattened r. 2% Claims Semi-molten tape-like material and wire-like material are supplied to the outer periphery of the core metal, and while being wound around the outer periphery of the core metal, the wound portion is axially rotated. The material is moved to form a corrugated pipe, and at any time, the tapered material and the linear material are pressed with rollers to flatten them, and a cylindrical portion is formed at any location. A method for producing a corrugated resin pipe having a cylindrical portion. Procedural amendment (voluntary) Director General of the Patent Office Aio Wakasugi 1, 4s Indication 1982 Patent Application No. 25801 2 Name of the invention Cylindrical i has @ - Manufacturing method of plastic corrugated pipe 3 Relationship with the supplementary Nagisa case Patent Applicant Location L12-464 Nagayoshi Deto 7-chome, Hirano-ku, Osaka Presence of amendment by attorney 2 (1) Specification (2) Specification V, page 3, lines 1 to 4: "Crush...at any time." Corrected to "At any time, the semi-molten tape-like material and linear material described in iU are pressed with a roller to make them flat." (3) Page 8 of the specification, lines 2 to 3 The phrase "the material is crushed into a spiral shape..." is corrected to "the tape-like material and the linear material are compressed and flattened by rollers." 2. Claims Semi-molten state A tape-like material and a wire material are supplied to a small outer periphery of the core, and wound around the outer periphery of the core metal. Once wrapped, the ``fc'' portion is moved in the axial direction to form a corrugated tube, and the above-mentioned half is attached at an arbitrary time. A method for manufacturing a plastic corrugated pipe having a cylindrical part, characterized in that a molten tape-like material and a wire-like material are pressed with rollers to flatten them, and a cylindrical part is formed at an arbitrary location.

Claims (1)

[Claims] The axial center is moved in the direction of the blade to form a corrugated tube, and at an arbitrary time, the tape-shaped material and the linear material immediately after being wrapped around the core metal are pressed with a eyelash to form a cylindrical portion at an arbitrary location. 1. A method for manufacturing a synthetic resin corrugated tube having a cylindrical portion.