JP2007185886A - Pasting-up method of tire constituent member by means of tire molding drum - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pasting-up method of a tire constituent member by means of a tire molding drum for improving the press bonding workability of a tread member and a casing member, preventing the air sump between the members or the pasted-up part of the terminal parts of the members from being opened and achieving enhancement of manufacturing precision and marked reduction of manufacturing trouble. <P>SOLUTION: A belt member 1 and a cap tread 2 are smoothly formed on a drum main body 11 to form a tread member 3. When the tread member 3 is bonded to casing member 6 after molding, the divided plates 12 of both end parts of the drum main body 11 are altered into the curved shape corresponding to the bonding shape of the casing member 6 and the tread member 3 as shown in Fig. 9. The alteration of the surface shapes of the respective plates 12 is performed by expanding and contracting an expansion and contraction means 13 and the belt member 1 and the terminal part of the cap tread 2 are bonded under pressure by a press bonding means such as a press bonding roller or the like not shown in Fig. on the altered drum main body 11 as shown by Fig. 10 to form a habit corresponding to the bonding shape with the casing member 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method of attaching a tire constituent member by a tire molding drum, and more particularly, in a green tire molding process of a tire molding process, improves the crimping workability between a tread member and a casing member made of a carcass or side tread, The present invention relates to a method for sticking a tire constituent member with a tire forming drum capable of improving manufacturing accuracy and reducing manufacturing failure.

  In general, in a tire molding process of a pneumatic tire for automobiles, particularly in a band molding process, a method of sequentially sticking a side member, a liner, a side reinforcing material, a carcass etc. on an expandable / contractible cylindrical band molding drum is performed. Yes.

  However, when each member is wound in a state of being sequentially stacked, the surface unevenness G gradually increases depending on the thickness of each member Wa, Wb, Wc, Wd, etc., as shown in the Y part of FIG. Since the gap Q is formed, the work of winding and bonding the next member becomes difficult. For this reason, there is a problem that air is trapped between the members, the bonding accuracy is deteriorated, the bonding portion of the member terminal portion is opened, and further, a manufacturing failure is caused due to disturbance of the carcass end.

  Therefore, as shown by Y ′ in FIG. 12, the surface of the wound member is made smooth by expanding and contracting the drum segment D in which the recessed portion G ′ approximately matched to the shape of the wound member is formed in advance. A tire assembly drum has been proposed (for example, Patent Document 1).

  However, in the case of the drum segment D in which the concave portion G ′ is formed in advance, there is a problem that the shape cannot be changed due to the member and the size cannot be shared. There is a problem that the member to be applied cannot be applied on a smooth surface, and a preferred member and a sacrificial member are inevitably generated, resulting in support for the member attaching operation.

  In recent years, the tire size has been made smaller and flat, and tire sizes having a wide tread width have been increasing. In the manufacturing process of such a small flat tire, the tread member 3 formed by winding the belt 1, the cap tread member 2 on the belt drum 7, and the carcass as shown in FIGS. 4 and the casing member 6 comprising the side tread 5 are joined to the casing member 6 while being compressed as indicated by the arrows on both shoulder sides 3x of the tread member 3, but the tread (belt) width is wide. Therefore, rigidity is high, and a strong force is required for compression, which may make it difficult to crimp.

  Therefore, manufacturing failures such as carcass cord waves (a phenomenon in which the carcass cords are disturbed) and air accumulation due to poor crimping are problems. Moreover, since it takes time to crimp, there is a problem that production efficiency is poor.

Therefore, as shown in FIGS. 15 and 16, it is conceivable to form a profile F at the time of molding on the belt drum 7 in advance and mold the tread member 3 in advance. Therefore, there is a problem that the size cannot be shared and productivity is poor, and there is a problem that workability when attaching the belt is deteriorated.
JP 2003-159758 A

  The present invention pays attention to such conventional problems, and in particular, improves the crimping workability between the tread member and the casing member, prevents the air accumulation between the members and the bonding portion of the member terminal portion from opening, and improves the manufacturing accuracy. It is an object of the present invention to provide a method for attaching a tire constituent member with a tire forming drum capable of remarkably improving and reducing manufacturing failure.

  In order to achieve the above object, the present invention arranges a plurality of divided plates in the circumferential direction of the drum in a cylindrical shape, divides the drum width direction of the plate into a plurality of portions, and divides the plurality of divided plates in the radial direction. A method of attaching a tire component member by a tire molding drum configured to be capable of forming an arbitrary surface shape by being expanded and contracted to form a tread member smoothly on the drum body of the tire molding drum, and the tread member When the casing member and the tread member are joined after molding, the divided plate at both ends of the drum body is changed to a shape corresponding to the joining shape with the casing member, and the tread member is placed on the changed drum body. The gist of the invention is that the casing member and the tread member are pressure-bonded and bonded to each other by a pressure-bonding means after being crushed in advance.

  Here, the crimping profile shape of the tread member and the casing member is stored in advance in a control device (not shown), and when crimping and joining the casing member and the tread member, based on the profile shape stored in the control device, It is also possible to change the surface shape of the drum body by expanding and contracting a plurality of plates.

  In addition, the casing member and the second member are joined by pressure bonding after the tread member is preliminarily kneaded in a state where the divided plate of the drum body is changed to an asymmetric shape at both ends of the drum body. The casing member and the tread member are joined by pressure bonding after the tread member is squeezed in advance in a state where the extendable cover member is covered on the divided plate of the drum body.

  By sticking the tire constituent member by such a method, it is possible to improve particularly the crimping workability between the tread member and the casing member, and to significantly improve the manufacturing accuracy and reduce the manufacturing failure.

As described above, the present invention arranges the plate divided into a plurality of portions in the drum circumferential direction in a cylindrical shape, divides the drum width direction of the plate into a plurality of portions, and expands / contracts the divided plurality of plates in the radial direction. A method of attaching a tire component member by a tire molding drum configured to be able to be operated to form an arbitrary surface shape, wherein a tread member is smoothly molded on the drum body of the tire molding drum, and after the tread member molding, When joining the casing member and the tread member, the divided plate at both ends of the drum body is changed to a shape corresponding to the joining shape with the casing member, and the tread member is preliminarily placed on the changed drum body. Since the casing member and the tread member are pressure-bonded and bonded by the pressure-bonding means after squeaking, the following excellent effects are achieved. Than is.
(a) The crimping workability between the tread member and the casing member can be improved, and the manufacturing accuracy can be improved and the manufacturing failure can be significantly reduced.
(b) It is possible to prevent manufacturing failures such as carcass cord waves and air accumulation due to poor crimping. (c) The time for crimping can be shortened and the production efficiency can be increased.
(d). It can be shared between sizes, and productivity can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a schematic configuration diagram of a tire molding drum embodying the present invention. The drum body 11 of this tire molding drum has a plurality of drum bodies 11 in the drum circumferential direction R (in this embodiment, there are 24 divisions. The plate 12 is divided into a cylindrical shape, and the drum width direction L of the plate 12 is divided into a plurality of portions.

  Inside the plurality of plates 12 divided in the drum circumferential direction R and the drum width direction L, as shown in FIGS. 2 to 4, each plate 12 is expanded and contracted in the radial direction, and has a fixing function. Each expansion / contraction means 13 is provided, and each expansion / contraction means 13 is connected to a drive source (not shown) provided in the drum central shaft portion 14.

  Each plate 12 can be enlarged by a predetermined height at an arbitrary position in the drum width direction L by the expansion / contraction means 13, and the expansion / contraction means 13 is connected to a fluid supply source in this embodiment. Although a fluid cylinder such as hydraulic pressure or pneumatic pressure is used, it is also possible to provide a rotary drive device (not shown) on the drum central shaft portion 14 and to configure a link mechanism connected to this rotary drive device.

  Further, the length of each of the divided plates 12 in the drum width direction L is preferably such that the drum width center portion S1 has a large width and the drum both ends S2 are formed small so as to follow the member shape. The narrowest plate 12 is formed to have a width of 8 to 12 mm and is easy to follow the member shape.

  Further, each plate 12 is configured so that the edge of the plate 12 is eliminated as shown in FIG. 6 from the embodiment as shown in FIG. 5, and the tire constituent members can be wound and bonded on a smooth surface. It is also possible to chamfer the peripheral edge 12a of the twelve or to cover it with an extendable cover member 15 such as a rubber sheet as shown in FIG.

  Next, a method for attaching tire constituent members using the tire forming drum as described above will be described with reference to FIGS.

  In the following description, the same components as those in the conventional example are denoted by the same reference numerals, and the description thereof is omitted. First, as shown in FIG. 8, the belt member 1 and the captread 2 are formed smoothly on the drum body 11 to form the tread member 3. When the tread member 3 is joined to the casing member 6 after molding, the divided plates 12 at both ends of the drum body 11 correspond to the joining shape of the casing member 6 and the tread member 3 as shown in FIG. Change to a curved shape.

  The surface shape of each plate 12 is changed by operating the expansion / contraction means 13 as described above, and the end portions of the belt member 1 and the capto red 2 are formed on the changed drum body 11 as shown in FIG. Are bonded by pressure bonding means such as a pressure roller (not shown) to match the shape of the connection with the casing member 6.

  By sticking the tire constituent members by such a method, even a wide belt member 1 can be crimped without using a strong crimping force, and it is possible to prevent a manufacturing failure such as an air pool due to a carcass cord wave or a crimp failure, and a tread. The crimping workability between the member 3 and the casing member 6 can be improved, and the manufacturing accuracy can be improved and the manufacturing failure can be significantly reduced. Further, the time for crimping can be shortened, the production efficiency can be increased, and the sizes can be shared, thereby improving the productivity.

  Further, in the above-described embodiment, the casing member 6 and the tread member 3 can be bonded by pressure bonding in a state where the divided plate 12 of the drum body 11 is changed to an asymmetric shape at both ends of the drum body 11. In addition, the casing member 6 and the tread member 3 can be bonded to each other in a state in which the cover member 15 that can be expanded and contracted is placed on the divided plate 12 of the drum body 11.

  In addition, when changing the plate 12 divided | segmented into the both ends of the drum main body 11 into the curved shape corresponding to the joining shape with the casing member 6, control which does not illustrate the crimping profile shape of the tread member 3 and the casing member 6 beforehand. The surface shape of the drum main body 11 is changed by operating a plurality of plates 12 via expansion / contraction means based on the profile shape stored in the device and stored in the control device at the time of joining with the casing member 6. It is also possible to configure.

  Thus, when crimping using the control apparatus which memorize | stored the crimping | compression-bonding profile shape of the tread member 3 and the casing member 6 previously, by operating the expansion / contraction means automatically, the tread member 3 and without manual intervention. The crimping workability with the casing member 6 can be improved, and the manufacturing accuracy can be improved and the manufacturing failure can be remarkably reduced.

It is a schematic block diagram of the tire shaping | molding drum which implemented this invention. It is a side view of a tire molding drum. It is a partially expanded sectional view of the Z section of FIG. FIG. 2 is a partially enlarged perspective view of a Z portion in FIG. 1. It is a partial enlarged front view of the plate which comprises a drum main body. It is a partially expanded front view which shows other embodiment of the plate which comprises a drum main body. It is a partially expanded front view which shows other embodiment which covers a cover member on the plate which comprises a drum main body. It is explanatory drawing of the 1st process which uses a tire shaping | molding drum of this invention, and performs a tread member. It is explanatory drawing of the 2nd process which uses a tire shaping | molding drum of this invention, and performs a tread member. It is explanatory drawing of the 3rd process which uses a tire shaping | molding drum of this invention, and performs a tread member. It is explanatory drawing of the process of sticking a tire structural member using the conventional tire shaping | molding drum. It is explanatory drawing of the conventional tire shaping | molding drum. It is explanatory drawing of the 1st process of crimping joining the conventional casing member and a tread member. It is explanatory drawing of the 2nd process of crimping joining the conventional casing member and a tread member. It is explanatory drawing of the process of sticking a tire structural member using the conventional tire shaping | molding drum. It is explanatory drawing of the process of sticking a tire structural member using the conventional tire shaping | molding drum.

Explanation of symbols

Wa Side member Wb Liner Wc Side reinforcement material Wd Carcass
G Concavity and convexity G 'Recessed portion D Drum segment F Profile
1 belt 2 cap tread member
3 Tread member 4 Carcass
5 Side tread 6 Casing member 3x Shoulder 7 Belt drum 11 Drum body 12 Plate 13 Enlarging / contracting means 14 Drum center shaft portion 15 Cover member 12a Plate peripheral portion
R Drum circumferential direction L Drum width direction S1 Drum width center S2 Drum both ends

Claims (4)

A plurality of plates divided in the circumferential direction of the drum are arranged in a cylindrical shape, the drum width direction of the plate is divided into a plurality of plates, and the divided plurality of plates are expanded and contracted in the radial direction to form an arbitrary surface shape. It is a method of attaching a tire constituent member by a tire molding drum configured to be formed,
When the tread member is smoothly formed on the drum body of the tire molding drum and the casing member and the tread member are joined after the tread member is formed, the divided plates at both ends of the drum body are joined to the casing member. According to the tire molding drum, the casing member and the tread member are pressure-bonded and bonded by a pressure-bonding means after the tread member is kneaded in advance on the changed drum body. A method for attaching tire constituent members. The crimping profile shape of the tread member and the casing member is stored in advance in a control device (not shown), and when the casing member and the tread member are crimped and joined, a plurality of plates are based on the profile shape stored in the control device. The method of sticking a tire constituent member with a tire forming drum according to claim 1, wherein the surface shape of the drum body is changed by expanding / contracting the drum. 3. The casing member and the second member are joined by pressure bonding after the tread member is preliminarily kneaded in a state where the divided plate of the drum body is changed to an asymmetric shape at both ends of the drum body. A method for attaching a tire constituent member using the tire molding drum according to claim 1. The casing member and the tread member are bonded by pressure bonding after the tread member has been squeezed in advance in a state where the extendable cover member is covered on the divided plate of the drum body. A method of attaching a tire constituent member using the tire molding drum.

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