Apparatus for forming tires utilizing rotary base

Abstract

An apparatus is invented for forming a tire tread on the surface of a prototype tire that is pre-fabricated during the tire manufacturing processes. The apparatus for forming the tire comprises six forming devices disposed above the circular rotary base for securing the prototype tire, a transporting compression ring disposed around the rotary base for supplying and compressing an iron core belt onto the prototype tire of the forming device, and a first extruder, a second extruder, a third extruder, and a fourth extruder for extruding a ribbon-shaped rubber band to form a tire tread on the surface of the prototype tire. Accordingly, by constructing a plurality of extruders around the circular rotary base, the installation space can be smaller than the conventional prototype tire forming apparatus, the device fabricating cost can be reduced, and various shaped tires can be fabricated.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a constructional view showing a device for fabricating a tire tread in a conventional tire forming apparatus.

FIG. 2 is a cross-sectional view taken along line B-B of FIG. 1.

FIG. 3 and FIG. 4 are cross-sectional views showing states of attaching the tire tread to the prototype tire by using a conventional compression ring and the side compression roller.

FIG. 5 is a plan view showing the tire construction of the present invention.

FIG. 6 is a front view showing the tire construction of the present invention.

FIG. 7 is a cross-sectional view showing a state of mounting the prototype tire to the tire forming device.

FIG. 8 is a cross-sectional view showing a state of supplying and attaching the iron core belt to the prototype tire by using the transporting compression ring.

FIG. 9 is a view showing a state of winding rubber bands extruded from the extruder around the prototype tire.

FIG. 10 is a partial cross-sectional view of the tire forming apparatus of the present invention.

FIG. 11 is a plan cross-sectional view showing the construction of upper and lower bases of the tire forming apparatus of the present invention.

FIG. 12 and FIG. 13 are views showing states of the tire forming apparatus of the present invention moving in all directions including forward, rearward, leftward and rightward and the rotating of an arm shaft.

Claims

1. A tire forming apparatus using a rotary base, comprising: a plurality of forming devices (30) radially disposed above a circular rotary base (32) for securing a prototype tire (19),a transporting compression ring (33) for supplying and compressing an iron core belt (20) onto the prototype tire (19) secured to the forming device (30), and a plurality of extruders (1, 2, 3 and 4) disposed around the outside of the rotary base (32) for extruding ribbon-shaped rubber bands (47) to form a tire tread (10) on the prototype tire (19).

2. The tire forming apparatus using a rotary base according to claim 1, wherein the transporting compression ring (33) is constructed of a plurality of compression cylinders (17) and side compression cylinders (44) disposed on a ring frame 16 in the radial direction such that the side compression cylinders (44) formed with curved side holders (45) are disposed at both sides of the compression cylinder (17).

3. The tire forming apparatus using a rotary base according to claim 1, wherein the forming device (30) is constructed such that an arm (36) can be rotated by means of the geared engagement between a driving gear (49) of a rotation motor (37) and a follower gear (50) with which a shaft (61) of the arm (36) is engaged, and the arm is moved in all directions by means of the threaded engagement of an upper base (51) with a screw (55) rotated by a base motor (53) of a lower base (52) and by means of the threaded engagement of a body (62) with a screw (59) rotated by a base motor (57) of the upper base (51).