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WO2013132908A1 - Dispositif de retenue de talon - Google Patents

Dispositif de retenue de talon Download PDF

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Publication number
WO2013132908A1
WO2013132908A1 PCT/JP2013/051280 JP2013051280W WO2013132908A1 WO 2013132908 A1 WO2013132908 A1 WO 2013132908A1 JP 2013051280 W JP2013051280 W JP 2013051280W WO 2013132908 A1 WO2013132908 A1 WO 2013132908A1
Authority
WO
WIPO (PCT)
Prior art keywords
bead
holder
holding device
ball
load
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2013/051280
Other languages
English (en)
Japanese (ja)
Inventor
中村　明弘
豪 井出
鈴木　隆太
俊一 藤村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Rubber Industries Ltd
Original Assignee
Sumitomo Rubber Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Rubber Industries Ltd filed Critical Sumitomo Rubber Industries Ltd
Publication of WO2013132908A1 publication Critical patent/WO2013132908A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/08—Building tyres
    • B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
    • B29D30/32—Fitting the bead-rings or bead-cores; Folding the textile layers around the rings or cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/08—Building tyres
    • B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
    • B29D30/32—Fitting the bead-rings or bead-cores; Folding the textile layers around the rings or cores
    • B29D2030/3207—Positioning the beads

Definitions

  • the present invention relates to a bead holding device used in a two-stage molding machine in a tire manufacturing process.
  • Patent Documents 1 to 3 When manufacturing a tire or the like having a radial structure, generally, a first former that winds a tire member including a carcass to form a cylindrical shape, and a cylindrical tire member that is shaped into a toroid shape, A so-called two-stage molding machine including a second former that forms a raw tire by sticking tread rubber or the like is widely used (for example, Patent Documents 1 to 3).
  • Fig. 4 schematically shows the first former.
  • the first former holds the central drum 50 for winding the tire member 64 into a cylindrical shape, and holds a predetermined bead 62 on the bead holding portion 54, so that it is lateral to both sides of the tire member 64.
  • a bead holder 52 for setting (horizontal hitting), and a winding means 80 for winding both side ends of the tire member 64 to the outside of the bead 62 by an expanding bladder 70 are provided.
  • a bead holder provided with a holding portion (bead set ring) having a diameter (bead set ring diameter) 0.4 mm smaller than the bead diameter is used for each type of bead.
  • the present invention provides a bead holding device that can reduce variations in code paths without causing bead dropping or setting failure while sharing the same bead holder for a plurality of types of beads. It is an issue to provide.
  • a bead holding device capable of reducing variations in code paths without causing bead dropping or setting failure while sharing the same bead holder for a plurality of types of beads. Can do.
  • FIG. 1 is a diagram for explaining a bead holder in the bead holder according to the present embodiment, in which the right figure is a plan view of the bead holder, and the left figure is an enlarged cross-section of a part surrounded by a broken line in the right figure.
  • FIG. 1 is a diagram for explaining a bead holder in the bead holder according to the present embodiment, in which the right figure is a plan view of the bead holder, and the left figure is an enlarged cross-section of a part surrounded by a broken line in the right figure.
  • the bead holding device is provided with a ring-shaped bead holding tool 10 as shown in the right view of FIG. 1, and the bead is provided in the bead holding tool 10 and holds the bead.
  • the bead core 30 a of the bead 30 is held by the bead holder 10.
  • ball plungers 15 as shown in the left diagram of FIG. 1 are arranged at 6 to 12 locations on the outer peripheral surface of the bead set ring 3 provided in the ring-shaped bead holder 10. Has been.
  • FIGS. 2A and 2B are diagrams illustrating a ball plunger used in the present embodiment, where FIG. 2A is a perspective view and FIG. 2B is a cross-sectional view.
  • the ball plunger 15 is configured such that a spring 18 and a ball 17 are arranged in order from the bottom inside a cylindrical container 16.
  • a flange having an opening having a smaller diameter than the ball 17 is provided so as not to jump out. The set bead is pressed and held from the inner diameter side by the ball 17 pushed upward by the force of the spring 18.
  • a preferable load is 1N or more and less than 4N per ball plunger.
  • the number of ball plungers 15 arranged on the bead holder 10 is too large, the pushing force of the plunger becomes too strong, making it difficult to set the beads and causing the occurrence of setting failure. There is a fear.
  • the amount is too small, the set bead may not be properly centered.
  • a preferable number is 6 to 12, and it is preferable that the ring-shaped bead holders 10 are arranged at substantially equal intervals.
  • the beads 30 can be set on the bead set ring 3 provided in the ring-shaped bead holder 10 in the same manner as a conventional bead holding device. Is centered by being pressed from the inner diameter side by the ball plunger 15.
  • the ball plunger 15 presses the set bead 30 from the inner diameter side, so that the clearance between the outer peripheral surface of the bead set ring 3 and the bead 30 can be moved by the ball 17 of the ball plunger 15.
  • a bead 30 having a different bead diameter specifically 0.4 to 1.7 mm larger in inner diameter, is set without replacing the bead holder 10, and each bead 30 is accurately centered.
  • Can do As a result, even when beads 30 having different bead diameters are set, variations in the code path can be reduced without causing bead drop or setting failure, and the frequency of replacing the bead holder 10 can be reduced. Can do.
  • evaluation was performed by the difference in the configuration of the bead holder provided in the bead holding device.
  • Comparative Example 1 a conventional bead holding device that needs to be replaced due to a difference in bead diameter is used, and two types of tires (tires) having different bead diameters in the 1-0 structure or the 2-0 structure are used. In all sizes, 195 / 65R15 91H ZE912) were exchanged 18 times per day, and a total of 100 pieces were produced. In addition, the clearance with the bead in this bead holder was 0.4 mm.
  • FIGS. 3 (a) to 3 (c) the bead holding part of each bead holder used in Comparative Examples 3 and 4 and Example 1 is shown in FIGS. 3 (a) to 3 (c), respectively.
  • magnets 58 are arranged at eight locations on the bead holder (see FIG. 3B).
  • ball plungers 15 having a load of 2 to 4 N / piece are arranged at eight positions of the bead holder (see FIG. 3C).
  • the code path is preferably less than R2.0, but in Comparative Examples 2 to 4, it is large as R2.5 to R3.0, showing that the variation is large.
  • the set defect is preferably 5 times / day or less, but it can be seen that in Comparative Examples 2 to 4, it frequently occurs at 15 to 30 times / day.
  • the comparative example 4 is inferior to 2 million times compared with 3 million times of another example.
  • Example 1 it was found that the cord path was R1.5, the set failure was 0 times / day, and the durability was excellent at 3 million times. It was confirmed that the arrangement of can suppress the occurrence of code path variations and set defects.
  • Example 2 was performed in the same manner as described above, except that a bead holder in which the number of ball plungers (load: 2 to 4 N / piece) shown in Table 2 was arranged in the bead holder was used. 100 and tires 100 to 4 and Comparative Examples 5 to 8 were manufactured, and similarly, the range R of the code path variation, the number of occurrences of set defects per day were measured, and RH1 (the measured value of RFV was Fourier transformed) The primary component detected by one revolution of the analysis was measured. The results are shown in Table 2. Table 2 also shows the results in Example 1 described above.
  • Examples 5 to 8 and Comparative Examples 9 to 8 were performed in the same manner as described above except that a bead holder in which the ball plungers having the numbers and loads shown in Table 3 were arranged in the bead holding part was used. 100 tires of each of 14 tires were produced, and similarly, the range R of the variation in the code path, the number of occurrences of defective sets per day, and RH1 were measured. The results are shown in Table 3.
  • the code path is preferably R1.0 to R1.5, the set failure is 0 times / day, and the RH1 is preferably 26.9 to 29.8 N. I understand.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tyre Moulding (AREA)
PCT/JP2013/051280 2012-03-05 2013-01-23 Dispositif de retenue de talon Ceased WO2013132908A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-048325 2012-03-05
JP2012048325A JP5475039B2 (ja) 2012-03-05 2012-03-05 ビード保持装置

Publications (1)

Publication Number Publication Date
WO2013132908A1 true WO2013132908A1 (fr) 2013-09-12

Family

ID=49116395

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2013/051280 Ceased WO2013132908A1 (fr) 2012-03-05 2013-01-23 Dispositif de retenue de talon

Country Status (2)

Country Link
JP (1) JP5475039B2 (fr)
WO (1) WO2013132908A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992008602A1 (fr) * 1990-11-13 1992-05-29 Sumitomo Rubber Industries, Ltd. Appareil et procede de confection de pneu cru
JP2003136376A (ja) * 2001-10-31 2003-05-14 Senjo Seiki Kk 研削装置
JP2012024996A (ja) * 2010-07-22 2012-02-09 Sumitomo Rubber Ind Ltd ビードセットリング

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992008602A1 (fr) * 1990-11-13 1992-05-29 Sumitomo Rubber Industries, Ltd. Appareil et procede de confection de pneu cru
JP2003136376A (ja) * 2001-10-31 2003-05-14 Senjo Seiki Kk 研削装置
JP2012024996A (ja) * 2010-07-22 2012-02-09 Sumitomo Rubber Ind Ltd ビードセットリング

Also Published As

Publication number Publication date
JP2013180562A (ja) 2013-09-12
JP5475039B2 (ja) 2014-04-16

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