Method for applying hot cushion gum to a tire carcass

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor

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156 96, 156130, B29D 3056

Patent

active

054475872

ABSTRACT:
Apparatus (10) for applying hot cushion gum (E) in a strip (12) of predetermined thickness and width to the crown surface (14) of a tire carcass (16) having a sagittal plane (68). The apparatus (10) includes a motor (M) for rotating the tire carcass (16), and extrusion means (18) for dispensing hot cushion gum through a die means (26). The angular disposition of the die means (26) may be selected relative to the sagittal plane (68) of the tire carcass (16) to determine the effective width of the strip (12) applied to the crown surface (14), rotational control mechanism (64) is also provided selectively to control the angular velocity of the rotating tire carcass (16) which determines the thickness of the strip (12). According to the present method a tire carcass (16) is mounted for rotation. The die head (26) is positionable at a selected angle (.beta.) within its angular range (.alpha.) measured transversely of the sagittal plane ( 68) of the tire carcass (16) to establish a selected, effective width (W.sub.SEL) of the strip (12) as it is applied by the die head (26) to the crown surface (14). So disposed the die head is brought into slightly deforming engagement with the crown surface (14), and the tire carcass (16) is rotated at a predetermined angular velocity while hot cushion gum is extruded through the die head (26) onto the crown surface (14) of the tire carcass (16).

REFERENCES:
patent: 3459613 (1969-08-01), Copenhefer et al.
patent: 3808076 (1974-04-01), Barwell
patent: 4240863 (1980-12-01), Vinton
patent: 5129356 (1992-07-01), Bandy et al.
patent: 5162070 (1992-11-01), Meyer
European Patent Office Communication dated Dec. 7, 1992, with attached European Search Report and Annex to European Search Report on European Patent Application No. EP 92 30 7568.

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