Tyre forming drum with expansible centre and independent expansible tyre rim locking assembly in its end

A technology of tire building drum and bead locking, which is applied to tires, household appliances, and other household appliances. It can solve problems that affect the uniformity of tires and inaccurate assembly of components, and achieve good results.

Inactive Publication Date: 2003-04-16
THE GOODYEAR TIRE & RUBBER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the components added to the carcass on the expansion drum are not assembled precisely, thereby affecting the uniformity of the tire

Method used

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  • Tyre forming drum with expansible centre and independent expansible tyre rim locking assembly in its end
  • Tyre forming drum with expansible centre and independent expansible tyre rim locking assembly in its end
  • Tyre forming drum with expansible centre and independent expansible tyre rim locking assembly in its end

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0085] Generally speaking, the existing manufacturing process of radial automobile tires includes an intermediate step. This step is to install two ring-shaped tires on a tire building drum on other parts of the tire carcass. Expanded beads, each bead includes a steel wire rope encased in raw rubber. A ring-shaped rubber filler called "filler strip" with a triangular cross section can be added. Then the part of the ply component that extends beyond the bead is turned up around the bead to form the "turn-up end". Then, the green carcass is generally removed from the tire building drum and then installed on the "second stage machine" to inflate (reshape) into a ring shape, and its radial outer surface is pressed against a tread and belt assembly. In the subsequent steps, the green carcass is pressed together (rolled with a roller) to remove air bubbles and glue the inner surfaces together. The resulting component is inserted into a mold (pressurization press), heated (generally 350°...

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Abstract

A tire building drum has a center section and two end sections. Each end section is provided with an expandable bead lock assembly. The center section is preferably expandable. The expandable bead lock assembly comprises a carrier ring and a plurality of elongate links extending between the carrier ring an d a plurality of radially- expandable segments. When the carrier ring moves inward (towards the center section), the radially-expandable segments move radially outward, urging a plurality o f axially extending, circumferentially spaced-apart finger segments outward from a collapsed position to an expanded position, and at least one position therebetween. In an embodiment of the invention, the bead lock assembly comprises a cylinder and two pistons disposed within the cylinder. The pistons are free to move axially within the cylinder, in response to pneumatic pressure. The first piston is constrained from moving axially inward by rods. The second piston is connected by rods to the carrier ring. Pressurized air supplied through hoses and passageways in the cylinder control the movement of the pistons so that the beach lock assembly can be partially-expanded, fully-expanded, and retracted, unexpanded position.

Description

Technical field [0001] The invention relates to a tire building drum for paving a carcass, in particular to a tire building drum that can be expanded between a contracted position and an expanded position. The invention also relates to a method and a device for setting beads on the green tire carcass. Background technique [0002] As we all know, when making vehicle tires such as automobiles, a so-called carcass is first made by assembling several different parts one after another. In other words, the different carcass types included in the production range can be distinguished from each other according to whether there are various accessory components thereon and / or the types of the accessory components themselves. [0003] For example, when the carcass of a tubeless tire is produced, the main components can be regarded as including the so-called inner liner made of air-impermeable elastic material; a carcass ply; a pair of carcass usually called bead cores The opposite ends of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D30/36B29D30/24
CPCB29D2030/3214B29D30/246B29D30/247B29D30/24
Inventor W·D·库里E·雷丁J·K·雷德赛斯
Owner THE GOODYEAR TIRE & RUBBER CO
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