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Forming machine

A molding machine and guide box technology, applied to tires, other household appliances, household appliances, etc., can solve the problems of increasing equipment costs, reducing production efficiency, frequent replacement, etc., and achieve the effect of inhibiting wear

Inactive Publication Date: 2015-04-15
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the airbag e is a consumable item and requires frequent replacement
This increases production costs and reduces productivity because the line must be stopped for replacement
In addition, since piping for intake and exhaust of air for inflating the airbag e and its control are required, the equipment cost also increases.

Method used

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Examples

Experimental program
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Embodiment Construction

[0054] Hereinafter, one embodiment of the present invention will be described in detail. figure 1 It is a plan view schematically showing an example of a green tire building line 2 using the building machine 1 of the present invention. In this embodiment, the two molding machines 1 are provided on the turntable 3 so that their positions can be exchanged with each other.

[0055] figure 1 Reference numeral 4 in the designates a so-called band drum, as Figure 9 As shown in (A), it is used to form a cylindrical green tire base body T with a bead core. like Figure 9 As shown in (B), sheet-like tire case components T1 such as an inner liner and a carcass are sequentially wound around the outer peripheral surface of the restraint drum 4 to form a cylindrical body, and then A bead core T2 is provided at each axial edge portion of the cylindrical body. Then, the extension portion T1a extending from the bead core T2 at each axial edge portion is folded around the bead core T2 ...

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PUM

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Abstract

The invention aims at providing a forming machine, which, in a state of hole enlargement, keeps air impermeability of the interior of a tire base body without using an airbag. A tire bead locking device (12) is provided with locking sections (20), the locking sections (20) are alternatively disposed along a circumferential direction and switched between a hole shrinkage state (Yr) and a hole enlargement state (Ye) via a shrinkage-enlargement device (21). The shrinkage-enlargement device (21) is provided with: a tapered sliding ring (24) movable in an axis-inwardly and axis-outwardly direction in a guide box (11) and provided with a tapered surface part (26) at the axis inner edge part of the sliding ring (24); and a plurality of raidially-movable sheets (25) respectively provided with a joint part (32) joining the tapered surface part (26) and making the locking sections (20) move in a radially-outward direction with the axis-inwardly movement of the sliding ring (24). In the state of hole enlargement (Ye), the locking sections (20) are circumferentially arranged and are abutted in an air impermeable state, thereby sealing a circumferential end surface (22, 23). The sliding ring (24) is provided with a sealing ring (34) and is used for contacting the axis outer surface of each locking section (20) in the hole enlargement state (Ye) and sealing a gap between the sealing ring (34) and the axis outer surface.

Description

technical field [0001] The present invention relates to a molding machine for expanding and molding a cylindrical green tire base into an annular shape, and more particularly, to a molding machine which can be used in an expanded state of a locking section holding a bead portion without using The air-tightness inside the base body of the green tire is maintained by the airbag, and molding can be performed without using the airbag. Background technique [0002] For example, in a two-step process for building radial tires, a cylindrical green tire base with bead cores formed in the first step is moved to a building machine and expanded into an annular shape in the second step. Then, the swollen portion of the base body of the green tire is attached to the inner peripheral surface of the tread ring in standby to form a green tire. [0003] As the above-mentioned molding machine, a molding machine described in the following Patent Document 1 is known. like Figure 10 As shown ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29D30/20
Inventor 鬼松博幸
Owner SUMITOMO RUBBER IND LTD