JPS6251431A - Production unit of synthetic resin tube - Google Patents

Abstract

PURPOSE:To make the continuous and easy manufacture of a synthetic resin tube possible by a method wherein linear stock having a cross-sectional form with a channel-shaped portion and a narrow sheet-shaped portion extending from one side of the opening edge of the channel-shaped portion, both of which are made of hard synthetic resin, and a wide sheet-shaped portion extending from the other side of said opening edge, which is made of soft synthetic resin, is supplied in the above-mentioned form. CONSTITUTION:Linear stock 1a, which is extruded from a molding die 23 and supplied to a main forming shaft 11, is wound up with the rotation of the main shaft 11. In this case, the channel-shaped portion 2'a of the following linear stock 1'a is wound on the wide sheet-shaped portion 3a of the linear stock 1a, which has been wound onto the main shaft 11 previously, so as to weld the narrow sheet-shaped portion 2'a-1 and the narrow sheet-shaped portion 2'a-2 near to the wide sheet-shaped portion 3'a of the channel shaped portion 2'a of the following linear stock 1'a with the side sheet-shaped portion 3a of the preceding linear stock 1a in order to continuously form a so-called tubular body 1. Further, if curing starts during the welding, the softening of welded part by blasting hot air with a hot air blasting device may be preferable.

Description

Detailed Description of the Invention (Field of Application of Industry 1) The present invention relates to a synthetic resin pipe, and more particularly, to an apparatus for manufacturing a synthetic resin pipe having a spiral protrusion on the outer wall of the pipe and a flat inner wall of the pipe. .

(Prior art) - Generally, in this type of synthetic resin pipe, the outer spiral protrusion is made of hard synthetic resin, and the inner flat inner wall is made of soft synthetic resin. is a special public official in 1977-
As disclosed in Japanese Patent Laid-open No. 53179-1 and Japanese Patent Application Laid-open No. 110428/1987, a strip material having a U-shaped cross section to become a protruding strip is supplied to a molding main shaft by a first molding die, A deck-shaped strip material that would become the inner wall of the 5[i river] was supplied using a molding die, and the two pot materials were fused and formed using a molding die 1 and a shaft 1-.

(Problems to be Solved by the Invention) As described in 1-1, a synthetic resin pipe is provided with a spiral protrusion made of a hard synthetic resin on the outside and a 14-round inner wall made of a soft synthetic resin on the inside. During its manufacture, it was necessary to use two machines for molding, making the structure of the entire device extremely complicated, which in turn caused problems such as the production time and production costs increasing. .

(1!!Means for solving the JW point) The present invention has been invented to solve the above-mentioned problems. The mold has a first passage for molding a U-shaped part with narrow plate-like parts on both side edges using a semi-molten hard synthetic resin, and a second passage for molding a wide plate-like part from a semi-molten soft synthetic resin. Two passages are formed, and the molding passage part of the narrow plate-shaped part on one side in the first passage and the molding passage part of the edge part on one side of the wide plate-shaped part in the second passage are made to communicate with each other before the exit. What is the cross-sectional shape that is formed to be a passageway part and has a U-shaped part, a narrow plate-shaped part extending from the open edge side of the cane part, and a wide plate-shaped part extending from the open green space side? The present invention is characterized in that the U-shaped portion and the narrow plate-shaped portion are made of hard synthetic resin, and the wide plate-shaped portion is configured to mold and supply a strip material made of soft synthetic resin.

(Function) The molten synthetic resin strip material extruded from the molding die and supplied to the molding spindle (1) is wound up in a spiral as the spindle rotates. There it is,
When winding this strip material, the U-shaped portion of the subsequent strip material is wound onto the wide plate-shaped portion of the strip material that was previously wound around the main shaft (1), and the large plate-shaped portion of the preceding strip material is wound. The narrow plate-shaped portion of the U-shaped portion and the vicinity of the U-shaped portion of the wide plate portion of the succeeding strip material are welded to each other, and a so-called tube body is continuously formed. In addition, the tube body formed in this way has a U-shaped part made of hard synthetic resin,
Since the large plate-shaped portion is made of soft synthetic resin, the outer spiral protrusion is made of hard synthetic resin to increase its flat strength, and the flat inner wall is made of soft synthetic resin. This ensures flexibility, and since the inner wall is flat, it makes it easier to pass electric wires through the pipe, and reduces the flow resistance when used as a drainage pipe. can be made extremely small.

(Example) An example of the present invention will now be described in detail based on the drawings.

In the figure, (II) is a cylindrical molding main shaft,
The main shaft (II) is inserted onto the fixed shaft (13), and bearings (+4) (14) are interposed between the inner periphery of both ends of this -L car (11) and the outer periphery of the fixed shaft (13). The main shaft (11) is rotatably supported on the fixed shaft (+3), and one end of the fixed shaft (13) is supported in a cantilevered manner on the base (12). In addition, the main shaft (II) is
), the rotor (18), which will be described later, is connected to a drive device (not shown) via a transmission mechanism such as is configured to be attracted onto the main shaft (11). The main shaft (11
) can also be supported directly on the base (M2) in a cantilevered manner without using the fixed shaft (+3).

Further, on the outer periphery of the main shaft (II), a large number of rotors J' (1B) are arranged in a plurality of rows in the length direction of the spindle (II), and this row-shaped rotor (+8) group The column direction of is the main axis (
II), and this columnar rotation J
The core shaft (+7) extending from the base (12) is inserted into the (+8) group, and the row-shaped rotor (18) group is rotatably supported by the main shaft (II) l. At this time, the free end of the core shaft (17) is secured to the fixed end plate (20) by tightening a nut (19) to the free end of the fixed shaft (13). Sho rotor (+8)
is made of iron-based metal and is attracted to the outer periphery of the L axis (II) by the magnet group (16).

Moreover, between each row of the row-shaped rotor group (18), there is a rotor (+8
) and a rod-shaped member (21) having a length extending from the base end to the distal end of the row-shaped rotor group (18) is inserted, and one end of this rod-shaped member (21) is connected to the base. The rod-shaped member (2) is attached to the base (+2), and the other end is fitted into the U7 recess (22) formed on the end plate (20).
1) is brought into contact with a group of adjacent row-shaped rotors (18) to regulate the spacing between each row. The rod-shaped member (21) is made of a synthetic resin with a small coefficient of friction, such as nylon or Teflon.

- - A strip material of a predetermined shape made of 1111 molten resin (
A molding metal 9 (23) for supplying straight a) is provided. As shown in FIGS. 6 to 8, this mold (23) has a first passage (23a) for molding molten hard synthetic resin and a second passage for molding semi-molten soft synthetic resin. (23b), and the first passageway (23a) has a narrow plate-like portion (2a-IH2
a-2) is molded, and the second passage (2a) is molded.
3b) is for forming a wide plate-shaped part (3a), in which the inner passages (23a) and (23b) are partially overlapped in front of the exit, that is, the narrow plate-shaped part (2a-2) in the first passage (23a) is formed. ) and the molding passage portion at the side edge of the large plate-shaped portion (:1la) in the second passage (23b) are configured to communicate with each other to form a common passage, and the U-shaped portion (2a) and a narrow plate-shaped portion (2a-) extending from the open edge side of the U-shaped portion (2a).
I), as well as the wide plate-like part (3) extending from one edge to the other side
a), and the U-shaped part (2a) and the narrow plate-shaped part (2a-1) are made of hard synthetic resin, and the wide plate-shaped part (3a) is made of soft synthetic resin. Joso Shrine (l)
a) is configured to be molded and supplied. Also, a mold for molding (23
) and the molding main shaft (I), a pair of molding maintenance rollers (24) and (25) are provided between the molding main shaft (I
11. Preventing deformation of each material (Ia) supplied to I). I'll be happy. N number of sets of the forming maintaining rollers (24025) may be provided.

In addition, in FIGS. 8 and 10, the narrow plate-shaped portion (2
a-2) and the large plate-like part (3a) for convenience-1-
Although the area was divided with clear lot lines, in reality the two areas merge and are not clearly demarcated.

The apparatus of the present invention is constructed as described above, and the main shaft for forming (
! 1) is driven to rotate, the row-shaped rotor (Ia) group supported by the core shaft (17) and attracted onto the main shaft (II) by the magnet group (I6) generates a frictional force with the main shaft (11). At this time, since the row direction of the row rotation end 8) group is inclined with respect to the axis of the main shaft (11), the rotor (18) is rotated from the molding die (23). The strip material (1a) supplied to is wound up spirally. At the time of winding, the width dimension of the strip material (1a) is larger than the width dimension of the strip material (Ia).
By setting the inclination angle of the front leg-like rotation (18) group with respect to the L axis (II) so that the helical feed pitch in a) becomes small, the strip material (1a) has its both side edges sequentially constant. Overlapping widths and welding to the child, the tube body (
+) is formed.

In addition, 1°, each row rotor (1°
8) Is the group pulled to one side (the rear side in the rotational direction of the main shaft (11)) as the strip material (1a) is wound?
This row-shaped rotor group (Ia) has a rod-shaped member (2
1), the spacing between each row is reliably maintained, and thereby the inclination angle of each group of row-shaped rotors (18) is reliably maintained.

On the other hand, as described in iff (the strip material (1a) extruded from the molding die (23) and supplied to the molding spindle (II)
is wound up spirally as the main shaft (11) rotates, the strip material (Ia) previously wound around the main shaft (11)
) The strip material (1'a) following the large plate-like part (3a)l
The U-shaped part (2'a) of is attached to the right, and this preceding strip material (1
The wide plate-like part (3a) of a), the narrow plate-like part (2"a-1) and the wide plate-like part (3"a) of the U-shaped part (2'a) of the subsequent strip material (I'a) Near the U-shaped part (narrow plate-shaped part (2'a-2
) ) are welded together to form a so-called tube body (+) continuously. Note that during this welding, if hardening has started, hot air may be blown using a hot air blowing device or the like to soften the welded portion again.

(Effects of the Invention) As explained in 1-1 below, in the synthetic resin pipe manufactured by the apparatus of the present invention, the outer spiral protrusion is formed of a hard synthetic resin, and the inner wall is formed of a soft synthetic resin. It has a high flatness, high strength, flexibility and flexibility, and its flat inner wall makes it easy to insert electric wires into pipes, or drain pipes. When used as a synthetic resin pipe, the flow resistance can be made extremely small, and such a synthetic resin pipe can be made very simply.
Using a manufacturing device with a unique structure, it is possible to manufacture continuously and easily, and the manufacturing cost can be significantly reduced.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIG. 1 is a plan view thereof, FIG. 2 is a longitudinal cross-sectional view thereof, FIG. Figure 2 is a sectional view taken along the line IV--IV, Figure 5 is a sectional view taken along line 3--V, Figure 6 is a cross-sectional view of the molding die with parts omitted, and Figure 7 is shown in Figure 6--■. 8 is a sectional view taken along the line 6--2 in FIG. 6, FIG. 9 is a side view of a synthetic resin pipe 11 manufactured by the apparatus of the present invention, and FIG. 10 is a partially enlarged sectional view thereof. (+)...tube, (la)...row material, (2a)...
...U-shaped part, (2a-1)...Narrow plate-shaped part, (3a)
...Large plate-shaped portion, (It)...Main shaft for forming, (23
)...Molding mold, (23a)...First passage, (2
3b)...Second passage. Figure 1 21 p0 Figure 9 Figure 1Q Procedure Amendment (Voluntary) 1985 1
Relationship with the case of October 76th, 1st Government, Mr. Michibu Uga, 3rd person who owns equipment for manufacturing acid-containing resin pipes Patent applicant address: 7-2-46 Nagayoshi Deto, Hirano-ku, Osaka City Name
Nichei Sangyo Co., Ltd. 4 Agent Address Month Day (shipment date Showa Year Month Day) Target 7, Supplementary iE Contents (1) Details 3, page 4, line 3 “1”, and line 5 r (+
) Delete J. (2) Page 4, line 8 [1 Change "shape material" to "row material"+fl' If:,. (3) Change "rear side" to "front side" in the third line of page 9. (4) On page 9, lines 12 to 16, ``The large plate-like portion... is welded'' is corrected as follows.

Claims (1)

[Claims] The mold is equipped with a mold for supplying a synthetic resin strip material to the molding main shaft, and the mold has a mold for molding a U-shaped part with narrow plate-shaped parts on both side edges using semi-molten hard synthetic resin. A first passageway and a second passageway for molding the wide plate-like part with semi-molten soft synthetic resin are formed, and the molding passage part of the narrow plate-like part on one side in the first passageway and the wide plate-like part in the second passageway are formed. A molded passage portion on one side edge of the U-shaped portion is formed to communicate with the molded passage portion in front of the exit to form a common passage portion, and the U-shaped portion, the narrow plate-shaped portion extending from one side of the opening edge of the U-shaped portion, and the opening. A strip material having a cross-sectional shape with a wide plate-like part extending from the other side of the edge, in which the U-shaped part and the narrow plate-like part are made of hard synthetic resin, and the wide plate-like part is made of soft synthetic resin, is molded and supplied. 1. A synthetic resin pipe manufacturing apparatus characterized by being configured as follows.