CN-121989487-A - Device and method for attaching rubber sheet to non-rubber-covered bead ring

Abstract

The invention discloses a device and a method for attaching rubber sheets to a non-rubber-covered wire ring, wherein the device comprises a forming drum, a capsule, an air charging and discharging mechanism and two boosting mechanisms, wherein the forming drum comprises a driving mechanism and a plurality of tiles, each tile forms a cylindrical surface, after the diameter of the forming drum is increased, the driving mechanism is matched with the non-rubber-covered wire ring to clamp the capsule on the inner side and the outer side of the capsule in the radial direction so as to divide the capsule into a left part and a right part which are axially independent, the capsule and the rubber sheets are sequentially sleeved on the peripheral surface of the forming drum from inside to outside, the air charging and discharging mechanism is used for charging the capsule so as to enable the left part and the right part of the capsule to be sequentially expanded, and the two boosting mechanisms are symmetrically arranged on the left side and the right side of the forming drum and can apply axial thrust force to the capsule towards the non-rubber-covered wire ring, so that the capsule deforms along with the contour of the non-rubber-covered wire ring, and the rubber sheets are better attached to the non-rubber-covered wire ring. By adopting the technical scheme of the invention, the tight, gapless and bubble-free adhesion of the rubber sheet and the bead ring can be realized.

Inventors

• XIE LEI
• SHI GUIBIN

Assignees

• 桂林梵玛科机械有限公司

Dates

Publication Date

20260508

Application Date

20260330

Claims (2)

1. 1. A device for not laminating rubber sheet of rubber bead ring, characterized by includes: After the diameter of the forming drum is increased, the driving mechanism (12) is matched with a non-glue-covered steel wire ring (5) sleeved on the periphery of the forming drum to clamp the inner side and the outer side of the capsule (9) in the radial direction so as to separate the capsule (9) into a left part and a right part which are axially independent; the rubber sheet (14) and the non-rubber-covered bead ring (5) are sleeved on the outer peripheral surface of the capsule (9) from inside to outside in sequence; the two boosting mechanisms (13) are symmetrically arranged at the left side and the right side of the forming drum, when one side of the capsule (9) is inflated, the boosting mechanisms (13) at the same side can apply axial thrust towards the non-rubber covered wire ring (5) to the capsule (9), so that the inflated capsule (9) is extruded and deformed along the outline of the non-rubber covered wire ring (5), further, a rubber sheet (14) between the capsule (9) and the non-rubber covered wire ring (5) is better attached to the non-rubber covered wire ring (5), and the rubber sheet (14) can be embedded into a gap of the non-rubber covered wire ring (5); The air charging and discharging mechanism comprises an air source, a first pipeline and a second pipeline, wherein the first pipeline and the second pipeline are communicated with the air source, the free ends of the first pipeline and the second pipeline are respectively in butt joint with air inlets on two axial sides of the capsule (9), and the air source can selectively charge the first pipeline and/or the second pipeline to enable the left part and the right part of the capsule (9) to expand in sequence; the non-glue-coated steel wire ring (5) is an annular steel wire ring which is formed by winding a single bare steel wire (1).
2. 2. The method for attaching the rubber sheet to the non-rubber covered wire ring by adopting the device of claim 1, comprising the following steps: 1) Obtaining an annular bead ring wound by a single bare steel wire (1), namely a bead ring (5) without glue; 2) Obtaining a rubber sheet (14) which is matched with the specification of the non-rubber-covered bead ring (5), attaching the rubber sheet (14) on the peripheral surface of the capsule (9) in a circumferential rotation manner, wherein the attached rubber sheet (14) is positioned in the axial middle of the capsule (9); 3) The non-rubber-covered bead ring (5) is sleeved at the middle part of the radial outer side of the rubber sheet (14) on the capsule (9); 4) The driving mechanism (12) expands radially outwards, the tile frames of the forming drum are synchronously spread to enable the capsule (9) and the rubber sheet (14) sleeved on the periphery of the forming drum to be abutted against the inner ring of the non-rubber covered steel wire ring (5), at the moment, the driving mechanism (12) and the non-rubber covered steel wire ring (5) are respectively clamped from the radially inner side and the radially outer side of the capsule (9), the capsule (9) is divided into two parts which are independent left and right in the axial direction of the non-rubber covered steel wire ring (5), and at the same time, the part, which is in contact with the non-rubber covered steel wire ring (5), of the rubber sheet (14) is preliminarily embedded into a gap of the inner ring of the non-rubber covered steel wire ring (5); 5) The capsule (9) on one axial side of the non-rubber covered steel wire ring (5) is inflated through the inflation and deflation mechanism, so that the capsule (9) on the same axial side of the non-rubber covered steel wire ring (5) is inflated, and the rubber sheet (14) on the same axial side of the non-rubber covered steel wire ring (5) is driven to wrap the non-rubber covered steel wire ring (5), so that the rubber sheet (14) is better attached to the non-rubber covered steel wire ring (5) and is further embedded into a gap of an inner ring of the non-rubber covered steel wire ring (5); 6) The boosting mechanism (13) on the same axial side of the non-rubber-covered wire ring (5) applies axial thrust towards the non-rubber-covered wire ring (5) to the capsule (9), so that the capsule (9) is extruded and deformed along with the contour of the non-rubber-covered wire ring (5), and further the rubber sheet (14) is better embedded into a gap of the covered non-rubber-covered wire ring (5); 7) The pasting of the rubber sheet (14) on the other axial side of the non-rubber-covered bead ring (5) is completed according to the operations in the steps 5) and 6); 8) And (3) taking down the bead ring which is adhered by the rubber sheet (14) from the capsule (9) through radial inward contraction of the driving mechanism (12) to obtain the tire bead ring with the inner layer of the bead ring (5) without the rubber coating and the outer layer of the rubber layer (6).

Description

Device and method for attaching rubber sheet to non-rubber-covered bead ring Technical Field The invention relates to a device and a method for attaching a rubber sheet to a non-rubber-covered bead ring, belonging to the technical field of tire production and manufacturing. Background The bead ring is a core bearing component at the tire bead position, and the structure and the processing technology directly determine the overall performance, the service life and the use safety of the tire. At present, the conventional processing technology of the tire bead ring is generally that after a bare steel wire 1 is led out from a steel wire unwinding device, the bare steel wire 1 is heated to a set temperature through high-frequency heating equipment, and is sent into a rubber coating extruder head to finish rubber coating treatment on the surface of the bare steel wire 1, a steel wire rubber coating layer 2 is formed on the surface of the bare steel wire 1, so as to obtain a rubber coated steel wire 3 (the structure is shown as a (A) diagram in fig. 1), the obtained rubber coated steel wire 3 is cooled and conveyed, and then is spirally wound on a bead ring winding machine die, so as to finally form the tire bead ring, namely a conventional tire bead ring 4 in the application, and the structure is shown as a (B) diagram in fig. 1. The application patent application with publication number CN113665153A relates to a tire bead ring which adopts the traditional process of steel wire heating, rubber coating and winding forming. With the development of special tires, a special tire bead ring structure is proposed in the industry, that is, a structure in which an inner layer is a non-rubber-covered bead ring 5 (as shown in a (a) diagram in fig. 2) and an outer layer is a rubber layer 6, as shown in a (B) diagram in fig. 2, and is called a novel tire bead ring 7 in the present application. The processing technology of the tire bead ring with the structure is different from the traditional technology, firstly, the bare steel wire 1 is directly sent to a bead ring winding machine die to be spirally wound to form the annular non-rubber covered bead ring 5, and then the rubber sheet 14 is attached to the outer surface of the formed non-rubber covered bead ring 5, so that the tire bead ring with the special structure is obtained. The tire bead ring with the structure is required on a low-speed heavy-duty engineering tire. Because the tire bead ring with the novel structure is a process of firstly forming the non-rubber-covered bead ring and then covering rubber, two core technical problems to be solved are existed in the step of pasting the rubber sheet, namely (1) the formed non-rubber-covered bead ring is in a normal temperature state, no adhesive layer is attached to the surface of the steel wire, no adhesive exists between the steel wire and the rubber sheet, the effective pasting of the steel wire and the rubber sheet cannot be realized by adopting a conventional pasting mode, and (2) gaps exist between the non-rubber-covered bead ring and the pasting surface of the rubber sheet, cavities and air can be remained, bulge and degumming defects easily occur in the subsequent use process, so that the bead ring is invalid, and the use standard of the tire cannot be met. In addition, partial technologies are aimed at the lamination of rubber cores and bead rings, and a compression roller lamination mode is adopted, so that the lamination method is only suitable for the adhesion of the rubber cores and the rubber-covered bead rings, and the problems of gap embedding and bubble-free lamination of the bare bead rings and the rubber sheets still cannot be solved. In summary, in the prior art, a special pasting method for pasting a glue-free bead ring after forming is not available, the difficult problem of close pasting of a bead ring formed by bare steel wires and a rubber sheet at normal temperature cannot be solved, and industrial popularization of a novel tire bead ring is restricted, so that a rubber sheet pasting technology adapting to the novel structure is needed to realize pasting without viscosity, bubbles and high precision. Disclosure of Invention The invention aims to manufacture a special tire bead ring and provides a device and a method for manufacturing the special tire bead ring. The device and the method can solve the technical problem that the rubber-free bead ring and the rubber sheet are non-sticky and the rubber sheet is adhered with air which is easy to remain to cause bulge in the later period, and realize the tight, gapless and bubble-free adhesion of the rubber sheet and the bead ring. In order to solve the technical problems, the invention adopts the following technical scheme: a device for attaching a rubber sheet to an un-glued bead ring, comprising: After the diameter of the forming drum is increased, the driving mechanism is matched with a non-glue-coated steel wire ring sleeved on the periphery of th