Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
  • B29C53/56—Winding and joining, e.g. winding spirally
  • B29C53/58—Winding and joining, e.g. winding spirally helically
  • B29C53/583—Winding and joining, e.g. winding spirally helically for making tubular articles with particular features
  • B29C53/585—Winding and joining, e.g. winding spirally helically for making tubular articles with particular features the cross-section varying along their axis, e.g. tapered, with ribs, or threads, with socket-ends
  • B29C53/586—Winding and joining, e.g. winding spirally helically for making tubular articles with particular features the cross-section varying along their axis, e.g. tapered, with ribs, or threads, with socket-ends having corrugations
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
  • B29C53/80—Component parts, details or accessories; Auxiliary operations
  • B29C53/82—Cores or mandrels
  • B29C53/821—Mandrels especially adapted for winding and joining
  • B29C53/825—Mandrels especially adapted for winding and joining for continuous winding
  • B29C53/827—Mandrels especially adapted for winding and joining for continuous winding formed by several elements rotating about their own axes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2023/00—Tubular articles
  • B29L2023/18—Pleated or corrugated hoses

Definitions

• the present invention relates to an apparatus for manufacturing a synthetic resin corrugated pipe, and more particularly, to a corrugated vertical cross-sectional shape of the outer peripheral surface of the pipe, which has a sufficient flat strength and is particularly stable in forming.
• the present invention relates to a corrugated pipe manufacturing apparatus having high durability and durability.
• an apparatus including a die for continuously supplying a synthetic resin strip in a molten state, and a driving motor for rotating each of the rollers at a constant speed. Further, a pressing roller having a shape matching with the outer peripheral surface of each roller for fixing the shape of the synthetic resin strip formed in the spiral tube from the outside of the virtual cylinder, a peripheral surface of the virtual cylinder Means for cooling the synthetic resin formed into a tubular shape along the pipe, and forming means for forming a smooth cylindrical synthetic resin inside the corrugated pipe to form a two-layer structure (Japanese Patent Publication No. 62-602) 6 No. 1) are also known.
• the synthetic resin strip is spirally wound and progresses while being cooled and hardened along the axial direction of the roller assembly.
• the fact that the trip itself is contracted by cooling is not taken into account. Therefore, since the plurality of convex rings provided on each roller are the same size and are arranged at equal intervals, the synthetic resin strip actually has the same shape as the convex ring. It hardens while being pulled outward along the shape. For this reason, as the synthetic resin strip advances in the axial extension direction of the roller assembly, the synthetic resin strip rises from above the roller at the valley between the convex rings of the roller.
• the corrugated pipes that come off are disadvantageous in that the molding stability, accuracy, durability, etc. of the obtained corrugated pipes are reduced.
• each roller constituting the roller assembly rotates at a constant speed.
• the peripheral speed at the vertex of the convex portion of each roller alone and at the valley between the convex portions is different. Since it differs by about 10 to 45%, vertical ridges (internal distortion) occur between the convex part and the valley of the corrugated pipe wall to be manufactured, and the impact resistance, pressure resistance, etc. There is a disadvantage that durability is reduced.
• An object of the present invention to prevent the synthetic resin strip from being detached from the mouth due to the shrinkage action of the synthetic resin strip, and to have excellent molding stability, high accuracy, impact resistance, pressure resistance and the like.
• An object of the present invention is to provide a corrugated pipe manufacturing apparatus having excellent durability.
• Another object of the present invention is to provide excellent durability such as impact resistance and pressure resistance.
• An object of the present invention is to provide an apparatus for manufacturing a corrugated pipe which does not generate a vertical zigzag (internal distortion) between a convex portion of the pipe and a valley between the convex portions.
• the roller means comprises a plurality of roller means each capable of rotating at a constant speed, and the roller means are arranged along the circumferential surface of the virtual cylinder to form substantially one rotating shaft.
• a roller assembly ; a roller support means provided to face the roller assembly in the axial direction and rotatably supporting the plurality of roller means; and a roller assembly extending from a side of the roller assembly to an outer peripheral surface thereof.
• a plurality of convex rings provided along the axial direction of each roller means form a spiral shape as a whole on the peripheral surface of the roller assembly.
• each of the convex strips at each of the roller means is provided.
• a corrugated pipe manufacturing apparatus (hereinafter referred to as a first manufacturing apparatus) in which the pitch between the rings, the diameter of the convex ring, and the convex width are gradually reduced in accordance with the shrinkage of the synthetic resin strip. ) Is provided.
• the present invention is composed of a plurality of mouthpieces each capable of rotating at a constant speed, and the mouthpieces are arranged along the circumferential surface of the virtual cylinder, and substantially one rotation axis is provided.
• a roller assembly having formed a body, the roller support means, the synthetic resin supply means, And a plurality of roller means, wherein the axis of the plurality of roller means is inclined toward the circumferential direction of the roller assembly, and a plurality of roller means are provided along the axial direction of each roller means.
• the convex ring forms a spiral shape as a whole on the peripheral surface of the roller assembly, and the convex ring is provided at a roller valley between the convex rings provided on the roller means.
• a corrugated pipe manufacturing apparatus hereinafter referred to as a second manufacturing apparatus
• a corrugated pipe manufacturing apparatus hereinafter referred to as a second manufacturing apparatus
• a corrugated pipe manufacturing apparatus (hereinafter, referred to as a third manufacturing apparatus) in which the first apparatus is further provided with the driven ring.
• Each of the corrugated pipe manufacturing apparatuses has a convex shape which coincides with the convex shape of the roller means in order to fix the shape of the synthetic resin strip formed in the spiral pipe.
• a pressure roller can also be provided.
• the cross-sectional shape of the pipe peripheral surface that matches the convex ring of the plurality of roller means is formed in a waveform, and further, the pipe peripheral surface formed in the waveform is formed.
• a smooth cylindrical synthetic resin may be formed, and an internal cylindrical surface forming means for forming the corrugated pipe into a double structure may be provided.
• Cooling means for cooling the wound synthetic resin strip may be provided inside the roller means and the inner cylindrical surface forming means.
• the inclination angle of the roller assembly toward the circumferential direction of the axis of the roller assembly is substantially a spiral shape.
• the supplied synthetic resin strip has an inclination angle that continuously advances in the axial extension direction of the roller assembly.
• the axis of each of the roller means is inclined toward the circumferential direction of the roller assembly, and each is inclined at the same angle to the central axis of the roller assembly, so that the diameter of the virtual cylinder gradually decreases as it advances in the axial extension direction. It can also be tilted so that it becomes darker.
• At least one of the roller supporting means may be provided with an inclination angle adjusting means capable of freely adjusting the inclination angle of the axis of the roller means.
• thermoplastic resin or the like examples thereof include polyethylene, polypropylene, and polyvinyl chloride. it can.
• the synthetic resin strip is supplied from the synthetic resin supply means, even if it is a flat band-like material, it is supplied in advance in an uneven shape that matches the shape of the roller means. You can also do it.
• the pitch between the convex rings, the diameter of the convex rings, and the convex width are gradually reduced according to the shrinkage rate of the synthetic resin strip.
• the plurality of convex rings provided on each roller means have the same size and are arranged at equal intervals, the roller accompanying shrinkage of the synthetic resin strip is generated. Synthesis at the valley between the convex rings of the means It is possible to prevent the resin strip from coming off, and to improve the molding stability, accuracy, durability and the like of the obtained corrugated tube.
• the pitch between the convex rings, the diameter of the convex ring, and the ratio of decreasing the convex width can be variously selected depending on the type of synthetic resin strip to be used.
• the molding shrinkage is approximately 2%. Since it shrinks approximately 10% after winding, it can be set according to this shrinkage rate.
• the ratio of the reduction depends on the synthetic resin used. Specifically, the pitch between the convex rings at the synthetic resin strip supply portion, the diameter of the convex ring, and the convex shape are used. Assuming that each value of the width is X and Y is the minimum of these values, it is desirable to set 0.8 ⁇ Y / X ⁇ 1, especially 0.9 ⁇ ⁇ ⁇ 1.
• the pitch between the convex rings, the diameter of the convex ring, and the range in which the convex width is reduced are reduced by the number of synthetic resin strips spirally wound along the roller assembly axial direction. It is sufficient that the pipe is formed in a spiral shape after the shrinkage of the synthetic resin strip (after the hardening), for example, within the area of the roller means where the shrinkage accompanying the hardening is performed.
• a convex ring used as shape retaining means for maintaining the shape of a ring it is not always necessary to change the value, and convex rings having the same shape are arranged at a uniform pitch. You can do it.
• a driven ring rotatable according to a peripheral speed of a vertex portion of a convex ring is formed by a roller assembly. Since each roller means constituting the body rotates at a constant speed, the peripheral speed at the vertex of the convex ring in each roller means and the valley between the convex rings differs by about 10 to 45%.
• the shaft of each roller means is formed. Irrespective of the rotational speed, the peripheral speed of the synthetic resin strip at the apex and the valley of the convex ring is driven by the peripheral speed of the apex of the convex ring so that the peripheral speed of the synthetic ring becomes constant.
• the member is not particularly limited as long as the member is capable of rotating, and the member is turned around the valley via a bearing or the like. And the child to adopt a-ring or the like provided in the standing is Ru can.
• FIG. 1 is a schematic side view showing an embodiment of the apparatus for producing a corrugated tube according to the present invention.
• FIG. 2 is an enlarged view of a roller having a convex ring in FIG.
• FIG. 3 is a schematic rear view of the manufacturing apparatus shown in FIG.
• FIG. 4 is a front view showing the support plate of the manufacturing apparatus of FIG. 1, but is a schematic view showing only the arrangement of the rollers for easy understanding.
• FIG. 5 is a schematic view showing a part of the inside of the roller assembly of the manufacturing apparatus of FIG.
• FIG. 6 is another example of a corrugated pipe manufacturing apparatus according to the present invention. One.
• FIG. 1 is a schematic side view showing one embodiment.
• FIG. 7 is a partially enlarged schematic cross-sectional view of the roller shown in FIG.
• FIG. 8 is a schematic cross-sectional view of FIG. 7 taken along the line C-C.
• FIG. 3 is an enlarged schematic view of a roller provided with a ring.
• 1 is a corrugated pipe manufacturing apparatus, and the manufacturing apparatus 1 includes a support frame 2, a disk-shaped support plate 4 opposed to the indicator frame 2, and a support frame.
• the manufacturing apparatus 1 includes a support frame 2, a disk-shaped support plate 4 opposed to the indicator frame 2, and a support frame.
• Nine rollers (3 a to 3 i) that are arranged along the virtual circumference between the second support plate 4 and the support plate 4 to form a roller assembly 3 that is substantially one rotating shaft;
• a main part is constituted by a motor 10 for rotating each of the rollers (3 a to 3 i) at a constant speed and a die 8 for supplying the synthetic resin strip A to the roller assembly 3.
• the rollers (3 a to 3 i) are provided with seven annular convex rings 9 on the peripheral surface as shown in FIG. 2 on the support frame 2 half.
• pitch-ring 9 ( ⁇ ⁇ ⁇ 6), the diameter of the convex-ring 9 (QQ?) and convex-ring 9 having a width (R ⁇ R 7) is supported from the support frame 2 in F ig 1 toward the plate 4, P 6 / P ⁇ Q yZ Q i and R 7 / / R i is respectively 0.9
• the support plate 4 side half is formed in a smooth cylindrical shape.
• the change in the pitch of each convex ring 9, the diameter of the convex ring 9 and the width of the convex ring 9 in FIG. It is expressed in size, which is different from the actual measurement.
• the support plate 4 is installed at the tip of an empty base shaft 5 that is disposed so as to penetrate the support frame 2, and the rollers (3 a to 3 i) are fixed by their shaft portions 6 and 7. Each is rotatably supported by a bearing. Each shaft portion 6 penetrating the support frame 2 is attached to each roller (3a to 3i) shown in FIG. 3 so as to rotate at a constant speed by the driving force of the motor 10.
• the sprocket mounted on the shaft 11 implanted in the support frame 2, the sprocket 12 mounted on the support frame 2, and the sprocket 14 mounted on the speed reducer 13 connected to the motor 10 And are connected by an endless chain (15, 16). At this time, the sprocket 17 is provided for adjusting the tension of the endless chain 15.
• the shaft portion 7 penetrating the support plate 4 penetrates an elliptical bearing portion 7a (see FIG. 4) that can adjust the inclination angle of the roller shaft, and is rotatably supported by the shaft. ing.
• the elliptical bearing In the part 7a when all the shaft parts 7 are all supported at the radially outermost positions of the virtual cylinder 18 as shown in Fig. 4, the roller assembly 3 becomes the whole. As a result, they are supported parallel to each other with respect to the axial direction X of the base axis 5 and inclined at an angle of X—y.
• the roller assembly 3 becomes the support frame 2 From the direction toward the support plate 4, the virtual cylinder 18 shown in FIG. 4 can be supported so that the diameter of the virtual cylinder 18 becomes gradually smaller.
• the shaft portion 7 is supported on the support plate 4 so that the diameter of the virtual cylinder 18 is gradually reduced, so that the synthetic resin stream wound spirally. Separation from the valley between the rollers (3a to 3i) caused by shrinkage due to cooling of the top A can be prevented.
• the roller 19 is used to press the synthetic resin strip A discharged from the die 8 against the peripheral surface of the roller assembly 3 to fix the shape of the synthetic tree S.
• a pressing roller having a concave and convex shape corresponding to the seven convex rings 9 in (3a to 3i), which is rotatable outside the roller assembly 3 forming a virtual cylinder.
• Reference numeral 20 denotes a guide roller for discharging the synthetic resin strip A to the roller assembly 3, which is provided in parallel with the outside of the roller assembly 3.
• reference numeral 21 denotes a die for discharging a synthetic resin strip B for forming a smooth cylindrical wall serving as an inner wall surface of the corrugated pipe.
• the synthetic resin strip B is connected to the
• the dies 21 are provided in the rollers (3a to 3i) installed in the intermediate portion inside the roller assembly 3 so as to be supplied to the smooth portions of the rollers (3a to 3i).
• a known cooling water circulating device (not shown) for cooling the spirally formed synthetic resin strip A discharged from the die 8 is provided therein.
• the synthetic resin strip A discharged from the die 8 is continuously discharged to the outer periphery of the rollers (3 a to 3 i) via the guide rollers 20.
• the motor 10 is driven, and the rolls (3a to 3i) rotate at a constant speed in accordance with the supply speed of the strip A. Due to such an action, the strip A proceeds sequentially to the outer circumferences m4, m3, m2, and ml of the roller assembly 3 in FIG. 1, and moves along the outer circumference of the roller assembly 3.
• the strip A after being continuously discharged overlaps a part of the previously supplied strip A, and the roller (3a) 3i) to advance using the inclination, and form a spiral shape as a whole.
• the strip A at the portion of the roller 3 i advances while being pressed by the pressing roller 19 so that the cross-sectional shape of the mouthpiece assembly 3 is fixed in a waveform.
• the synthetic resin strip is taken from the die 21 shown in FIG. Is discharged, and is sequentially supplied to the smooth portions of the rollers (3a to 3i) and proceeds.
• a cylindrical inner peripheral surface is formed while continuously being fusion-bonded to the inner surface of the spirally formed strip A.
• the strip B advances in the extension direction of the support plate 4 sequentially by using the inclination of the axis of each roller (3a to 3i), and the wavy outer wall and the cylindrical inner circumference Korgut tubes having a two-layer structure on the surface are manufactured continuously.
• each convex ring 9 provided on each roller (3 a to 3 i) moves from the support frame 2 toward the support plate 4.
• the pitch, diameter and width between the convex rings 9 are formed so as to gradually decrease at a rate corresponding to the contraction rate of the strip A.
• the valley of the rollers (3a to 3i) between the final convex ring 9 and the previous convex ring 9 regardless of the contraction caused by the cooling of the strip A.
• the corrugated outer periphery of the Korgut tube is continuously formed without the strip A coming off from the valley portion. Therefore, the obtained corrugated tube is particularly excellent in molding stability and precision, and furthermore, durability is improved.
• the axial direction of the rollers (3a to 3i) is inclined so that the diameter of the roller assembly 3 gradually decreases. Ri by the and this, Ru can trigger further improve the molding stability and accuracy, etc. t
• 60 is another corrugated pipe manufacturing apparatus, and the manufacturing apparatus 60 is a manufacturing apparatus 1 shown in FIG.
• nine rollers 63a to 63i), each of which has eight convex rings 62 of the same shape and the same size and arranged at the same pitch, are provided.
• the dice 21 for forming a smooth inner surface shown in FIG. 5 are not provided. Accordingly, the other members shown in FIG. 6 have the same functions as those shown in FIG. 1, and therefore, are denoted by the same reference numerals as those in FIG.
• Fig. 7 is a partially enlarged cross-sectional view for explaining the rollers (63a to 63i) shown in Fig. 6, and Fig. 8 is a schematic C-C cross-sectional view shown in Fig. is there.
• the rollers (63 a to 63 i) are provided with convex rings 62 of the same shape and the same size at equal intervals, and the rollers at the valleys between these convex rings 62 are provided.
• the driven ring 61a is positioned on the positioning member 61c via the dry bearing ring 61b on the positioning member 61c, and is rotated by the fixing member 65 regardless of the rotation of the roller substrate 64. It is movably fixed.
• a well-known cooling device (not shown) for circulating cooling water is provided inside each of the rollers (63a to 63i).
• the synthetic resin strip A discharged from the die 8 is continuously discharged to the outer circumference of the rollers (63 a to 63 i) via the guide rollers 20.
• the motor 10 is driven, and the rollers (63a to 63i) rotate at the same speed as the supply speed of the strip A.
• the strip A travels sequentially to the outer periphery of the roller assembly 63 in FIG 6: the points of ⁇ 4, m3, m2, and m1, and the outer periphery of the roller assembly 63
• the strip A from the continuous discharge is overlapped with a part of the previously supplied strip A while the roller (63) Advancing using the inclination of a to 63i), a spiral shape is formed as a whole.
• the strip A at the roller 63 i advances while being pressed by the pressing roller 19 so as to fix the outer peripheral surface of the roller assembly 63 to a waveform. .
• the driven ring 6 la rotates in accordance with the peripheral speed of the vertex of the convex ring 62, so that the peripheral portion between the vertex of the convex ring 62 and the roller base material 64 is rotated.
• the internal distortion of strip A due to the difference in speed can be eliminated, and the convex rib, which normally occurs when using a conventional roller without such a driven ring, is used.
• Fig 9 90 is the pitch (P i P s) of each convex ring 92, and the diameter of the convex ring 92, similarly to the rollers (3 a to 3 i) shown in FIG 2.
• Q i ⁇ Q 7 ) and the width (length) of the convex ring 92 are gradually reduced, and the positioning shown in Fig 7 is located at the valley between each convex ring 92.
• This is a roller in which a driven ring 91 similar to the driven ring 61 a that is rotatably fixed via a drive bearing 61 b on a tool 61 c is installed.
• the roller 90 By using the roller 90 in place of the roller of the manufacturing apparatus (1, 60) shown in FIG. 1 or FIG. 6, the roller accompanying the contraction action of the synthetic resin strip can be obtained. Prevents detachment from above, is excellent in molding stability, has high accuracy, and has vertical ridges (internal distortion) generated between the convex rings and the valleys between the convex rings. Thus, it is possible to manufacture a corrugated pipe having excellent durability such as impact resistance, pressure resistance and the like, which prevents the occurrence of cracks.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Shaping Of Tube Ends By Bending Or Straightening (AREA)

Priority Applications (5)

Applications Claiming Priority (4)

Publications (1)

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Family Applications (1)

Country Status (13)

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Citations (3)

Family Cites Families (7)

• 1993
  • 1993-11-03 TW TW082109188A patent/TW226003B/zh active
  • 1993-11-04 IL IL10749293A patent/IL107492A/en not_active IP Right Cessation
  • 1993-11-08 WO PCT/JP1993/001616 patent/WO1994011180A1/ja active IP Right Grant
  • 1993-11-08 US US08/256,620 patent/US5593535A/en not_active Expired - Lifetime
  • 1993-11-08 NZ NZ257388A patent/NZ257388A/en unknown
  • 1993-11-08 ES ES93924191T patent/ES2105341T3/es not_active Expired - Lifetime
  • 1993-11-08 EP EP93924191A patent/EP0635353B1/en not_active Expired - Lifetime
  • 1993-11-08 CA CA002127810A patent/CA2127810C/en not_active Expired - Fee Related
  • 1993-11-08 DE DE69312283T patent/DE69312283T2/de not_active Expired - Fee Related
  • 1993-11-08 AU AU53770/94A patent/AU660245B2/en not_active Ceased
  • 1993-11-12 MY MYPI93002379A patent/MY119484A/en unknown
  • 1993-11-13 CN CN93114655A patent/CN1043973C/zh not_active Expired - Fee Related
• 1994
  • 1994-07-06 KR KR94702337A patent/KR0151245B1/ko not_active Expired - Fee Related
• 1995
  • 1995-04-05 AU AU16283/95A patent/AU673121B2/en not_active Ceased
  • 1995-10-27 US US08/549,576 patent/US5662764A/en not_active Expired - Lifetime

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