KR20140016739A - Drum segment operating device of building drum for manufactturing tire - Google Patents

Abstract

The present invention relates to a drum segment operating device of a molding drum for manufacturing a tire. The drum segment operating device of the present invention is able to obtain an enough diameter difference required in molding and drawing a first molding case even though a thermal strain occurs upon the temperature condition in the molding process by configuring a first and a second drum segment alternately installed along the circumference of a drum shaft to expand and contract with a first and a second operating means linked with a double loader cylinder with a time lag. The drum segment operating device of the present invention has effects of improving the productivity and reducing the manufacturing cost in manufacturing a molding drum by allowing the first and second drum segments to expand and contract with a time lag without interference to simplify the configuration of the drum segment operating device.

Description

TECHNICAL FIELD [0001] The present invention relates to a drum segment moving device for use in a molding drum for manufacturing a tire,

The present invention relates to a drum segment moving apparatus for a building drum for manufacturing a tire, and more particularly, to a molding apparatus for molding a drum segment for forming a primary molding case of a green tire, And more particularly, to a drum segment moving device for a building drum for manufacturing a tire, which makes it possible to reduce the number of segments more easily and easily.

As is well known, finished product tires are used in refining processes to make compounds by mixing raw materials, extrusion / rolling / cutting processes in which compounds are manufactured into semi-finished products in sheet form, molding processes in which semi-finished products are molded into green cases , And a curing process in which the above green case is vulcanized.

The green case formed in the molding process means that the green case is formed close to the shape of the tire before vulcanization and includes a first green case manufactured through a first molding step and a second green case manufactured through a second molding step .

The above-mentioned primary green case is formed by laminating an inner liner, a body ply, a side wall, a bead and a nylon chafer in the form of a sheet, , And the second green case is formed by winding a sheet-form belt, a cap ply, and a tread rubber semi-finished product to form a green sheet.

The forming drums for forming the primary green case are formed by pressing the semi-finished products sequentially formed by expanding the diameter of the drum segments in accordance with the standard of the finished product tires and compression-molding the drum parts, And draw out the completed primary green case.

However, since the conventional forming drums are configured such that each of the drum segments is simultaneously expanded and contracted, in order to allow each of the drum segments to have a sufficient diameter difference required for molding and drawing of the primary molded case, It is very difficult to design and manufacture the moving devices of the drum segments, and the configuration becomes complicated, resulting in a decrease in the productivity of the forming drum and a manufacturing cost.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems described above and to provide a method of manufacturing a drum- Which can simplify the construction of the drum segment moving device by allowing the drum segment moving device to be expanded and contracted with a parallax without being interfered with each other, thereby providing a drum segment moving device for a building drum for manufacturing a tire.

According to an aspect of the present invention, there is provided a drum segment moving apparatus for a tire for manufacturing a tire, comprising: a plurality of first drum segments installed along a circumferential direction of a drum shaft; A plurality of second drum segments alternating with the first drum segments along a circumferential direction of the drum shaft and each installed between the first drum segments; First operating means for contracting or expanding the first drum segments, respectively, in the radial direction of the drum shaft; And second actuating means for contracting or expanding the second drum segments in a radial direction of the drum shaft with a parallax with respect to the first drum segments, wherein the first actuating means comprises: And the second movable means is operated to expand in a spaced manner so as to form an appearance of a maximum diameter of the forming drum together with the second drum segments, The second drum segments abutting each other in a circumferential direction and filling between the first drum segments retracted and retracted within the first drum segments to complete the appearance of the minimum diameter of the forming drum, Diameter of the outer diameter of the outer diameter of the outer diameter portion.

The first movable unit is fixed on the outer circumferential surface of the stationary frame fixed to the drum shaft, and the first and second loaders are provided on both sides in the longitudinal direction of the drum shaft, Double loader cylinder; A first movable flange movably installed in a longitudinal direction on an outer peripheral surface of one side of the fixed frame; A first movable link connecting the first movable flange and one end of the first drum segment and operatively connected by the first loader of the first double loader cylinder; A first stationary link connecting one end of the stationary frame and a center portion of the first movable link and restricting a direction in which the first movable link is folded and unfolded by the first loader; A second movable flange installed separately from the tile-side end of the fixed frame so as to be movable along the drum shaft; A second movable link connecting the second movable flange and a tile side end of the first drum segment, the second movable link being connected to the second loader of the first double loader cylinder; And a second fixed link connecting the tile side end of the fixed frame and the center portion of the second movable link and limiting the direction in which the second movable link is folded and unfolded by the second loader .

In addition, a first fixing protrusion is formed in the end portion of the fixed frame at the second movable flange so as to be fitted in and fixed to the inside of a through hole of the second movable flange moved along the drum shaft when the first drum segment is expanded .

The second movable unit is fixed on the outer circumferential surface of the stationary frame, and the first and second loaders are formed on both sides of the drum shaft in the longitudinal direction so that the first and second loaders interlock with each other in different directions. A third movable flange movably installed in the longitudinal direction on the outer peripheral surface of the fixed frame tile; A first movable link connecting the third movable flange and a tile side end of the second drum segment and connected to a first loader of the second double loader cylinder; A third fixed link connecting a tile-side end of the fixed frame and a central portion of the third movable link; A fourth movable flange movably installed along the drum shaft at an outer side of one end of the fixed frame; A fourth movable link connecting the fourth movable flange and one end of the second drum segment, the fourth movable link being connected to a second loader of the second double loader cylinder; And a second fixed link connecting one end of the fixed frame and a central portion of the fourth movable link.

In addition, the fourth movable flange-side end of the fixed frame may be provided with a second fixing protrusion formed to protrude and to be fixed in the inside of the through hole of the second movable flange moved along the drum shaft when the first drum segment is expanded .

The third movable link and the fourth movable link may be provided with a first bent portion formed by bending a central portion to which the third fixed link and the fourth fixed link are connected, And a second bent portion formed by bending the end portions of the third movable link and the fourth movable link.

According to the drum segment moving device of the present invention, the first and second drum segments alternately installed along the circumferential direction of the drum shaft are connected to the first and second movable means It is possible to obtain a sufficient difference in diameter required for molding and drawing of the primary molded case even if thermal deformation occurs according to the temperature conditions during the molding process, The second drum segments can be expanded and contracted without being interfered with each other with a time difference, thereby simplifying the structure of the drum segment moving device, thereby increasing productivity in manufacturing the molding drum and reducing manufacturing cost.

1 is a front sectional view of a drum segment moving device of a building drum for manufacturing a tire according to an embodiment of the present invention.
2 is a side cross-sectional view of the molding drum cut along the line II-II in FIG.
3 is a partial enlarged view showing the operating state of the movable and stationary links connecting the second drum segment of FIG.
Fig. 4 is a front sectional view showing the process of expanding the drum segments of the drum segment moving device of the building drum for manufacturing tire of Fig. 1;
FIG. 5 is a schematic cross-sectional side view showing a process of expanding the forming drum to the maximum diameter state through the expansion process of FIG.
FIG. 6 is a front sectional view showing a process of reducing the number of drum segments of the drum segment moving device of the building drum for manufacturing tire of FIG. 1;
FIG. 7 is a side cross-sectional schematic view illustrating a process of reducing the forming drum to the maximum minimum state through the reduction process of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

FIG. 1 is a front sectional view of a drum segment moving apparatus of a building drum for manufacturing tires according to an embodiment of the present invention, and FIG. 2 is a sectional view cut along the line II-II in FIG.

1 and 2, the drum segment moving apparatus of the building drum for manufacturing tire according to the present embodiment includes the drum shaft 10, the first drum segments 30, the second drum segments 40, (50) and a second movable unit (60).

Each of the first drum segments 30 is installed along the circumferential direction of the drum shaft 10 and is linked and extended in the radial direction of the drum shaft 10 by means of the first moving means 50 do.

The second drum segments 40 are disposed alternately with and between the first drum segments 30 along the circumferential direction of the drum shaft 10 and are connected to the drum shaft 10 To be contracted and expanded in the radial direction.

In the present embodiment, the building drum 1 is exemplified by five first drum segments 30 and second drum segments 40, respectively. However, the present invention is not limited to this, and the first drum segments 30 and the second drum segments 30 may be formed in accordance with the specifications of the finished product tires to be manufactured as long as a sufficient diameter difference can be obtained in the process of forming and drawing the primary molding case. It is needless to say that the number of the drum segments 40 can be increased or decreased.

The first actuating means 50 is configured to contract or expand the first drum segments 30 in the radial direction of the drum shaft 10, respectively.

Thus, the first actuating means 50 folds so that the first drum segments 30 are in contact with one another in the circumferential direction and merely meet the minimum diameter d1 of the forming drums (see Figs. 4-7) (see Fig. 4 to Fig. 7), or the first drum segments 30 together with the second drum segments 40 may have the appearance of the maximum diameter d2 (see Figs. 4-7) of the building drum And extend to their maximum radii r3 (see Figs. 4-7).

The second actuating means 60 is configured to shrink or expand the second drum segments 40 in the radial direction of the drum shaft 10 at a parallax with the first drum segments 30.

Accordingly, the second movable means 60 is arranged such that the second drum segments 40 first come into contact with each other in the circumferential direction first and complete the appearance of the minimum diameter d1 (see Figs. 4 to 7) 4 to 7) so as to be accommodated in the drum segments 30 or to allow the second drum segments 40 to stagger between the already extended first drum segments 30 (See Figs. 4 to 7) so as to complete the appearance of the molding drum and the maximum diameter d2 (see Figs. 4 to 7) of the molding drum.

In this embodiment, the first movable unit 50 includes the first double loader cylinder 51, the first movable flange 52, the first movable link 53, the first fixed link 54, the second movable flange 52, 55, a second movable link 56, and a second fixed link 57, as shown in Fig.

The first double loader cylinder 51 is fixed on the outer circumferential surface of the stationary frame 20 fixed to the drum shaft 10 and is provided on both sides of the longitudinal direction of the drum shaft 10 with the first and second loaders 51a, 51b are formed to be interlocked with each other in different directions.

The first movable flange 52 has a circular ring shape and is fitted on the outer peripheral surface of the fixed frame 20 so as to be movable in the longitudinal direction.

The first movable link 53 connects one end of the first movable flange 52 and one end of the first drum segment 30 and connects the first movable link 51 to the first movable link 51 through the first movable flange 52, And is operatively connected by the loader 51a.

The first fixed link 54 connects the one end of the fixed frame 20 and the central portion of the first movable link 53 and is folded and unfolded by the first movable link 53 which is operated by the first loader 51a Limit the direction.

The second movable flange 55 has a circular ring shape like the first movable flange 52 and is installed separately from the outer side of the tile side end portion of the fixed frame 20 so as to be movable along the drum shaft 10 .

The second movable flange 55 has a first fixing protrusion 21 protruding from the end of the fixing frame 20 when the first drum segment 30 is extended to the inside of the shaft through hole of the second movable flange 55 So that the first drum segment 30 can be separated from the stationary frame 20 when the first drum segment 30 is retracted, So that it can freely move along the small-diameter drum shaft 10 in a loosened state.

The second movable link 56 connects the second flange 55 and the tile side end of the first drum segment 30 and connects the second loader 55 of the second double loader cylinder 51, (51b).

The second fixed link 57 connects the tile side end of the fixed frame 20 and the central portion of the second movable link 56 and the second movable link 56 is folded and unfolded by the second loader 51b .

The second movable unit 60 is provided with the second double loader cylinder 61, the third movable flange 62, the third movable link 63, the third fixed unit 63, A link 64, a fourth movable flange 65, a fourth movable link 66, and a fourth fixed link 67. As shown in Fig.

The second double loader cylinder 61 is fixed on the outer circumferential surface of the fixed frame 20 like the first double loader cylinder 51 described above and is provided on both sides of the longitudinal direction of the drum shaft 10, The loaders 61a and 61b are formed so as to be interlocked with each other in different directions.

In particular, the second dual loader cylinder is configured so that the second drum segments 40 are moved to the first drum segment 30 (in order to avoid interference with the first drum segments 30, which are expanded and contracted by the first double loader cylinder 51) To extend and contract the second drum segments 40 in different directions.

 The third movable flange 62 is formed in a circular ring shape and is provided so as to be movable in the longitudinal direction on the tile-side outer circumferential surface of the fixed frame 20.

The third movable link 63 connects the third movable flange 62 and the tile side end of the second drum segment 40 and connects the third movable flange 62 to the second double loader cylinder 61 via the third movable flange 62. [ 1 loader 61a.

The third fixed link 64 connects the tile side end of the fixed frame 20 and the central portion of the third movable link 63 and the third movable link 66 is folded and unfolded by the first loader 61b Limit the direction.

The fourth movable flange 65 is formed in a circular ring shape and is separated from the outer side of one end of the fixed frame 20 so as to be movable along the drum shaft 10 separately.

As in the second movable flange 55 described above, the fourth movable flange 65 is provided with a second fixing projection 22 formed to protrude from the end of the fixing frame 20 when the second drum segment 40 is extended. 4 movable flange 65 and fixedly held by the fixed frame 20 so as to firmly support the expanded state of the second drum segment 40 and to hold the second drum segment 40 40 can be freely moved in a state of being separated from the fixed frame 20 and loosened along the drum shaft 10 having a relatively small diameter.

The fourth movable link 66 connects the fourth movable flange 65 and one end of the second drum segment 40 and connects the fourth movable flange 65 to the second end of the second double loader cylinder 61 through the fourth movable flange 65, And is operatively connected by a loader 61b.

The fourth fixed link 67 is connected to one end of the fixed frame 20 and the central portion of the fourth movable link 66.

Fig. 3 is a partial enlarged view showing an operating state of a fixed and movable link connecting the second drum segment of Fig. 1; Fig.

3, the third movable link 63 is formed by bending a first bent portion 63a at a central portion to which the third fixed link 64 is connected, and a third fixed link 64, The second bending portion 64 is bent at the connection side end portion of the third movable link 63. [

The fourth movable link 66 and the fourth fixed link 67 are also provided with the first bent portion 63a and the second bent portion 63a in the same manner as the third movable link 63 and the third fixed link 64, 64a are respectively bent.

In this way, the first bending portion 63a is formed on the third movable link 63 and the fourth movable link 66, and the third fixed link 64 and the fourth fixed link 67 By forming the two bent portions 64a, the second double loader cylinder 61 reduces the folding width of the second drum segments 40 relative to the first drum segments 30 at the time of shrinking, So as to be housed within the first drum segments 30 that complete the appearance of the first drum segments 30 while completing the appearance of the largest diameter of the building drum, To be extended with the same spreading distance as the drum segments (30).

On the other hand, the first double loader cylinder 51, the first movable link 53, the first fixed link 54, the second movable link 56, and the second movable link 56 constituting the above- 2 fixed link 57 and the second double loader cylinder 61, the third movable link 63, the third fixed link 64, the fourth movable link 66, The fourth fixed links 67 may be installed alternately along the outer circumferential surface of the fixed frame 20 by five corresponding to the first drum segments 30 and the second drum segments 40, respectively.

Hereinafter, the process of expanding and contracting the diameter of the forming drum through the drum segment moving device of the forming drum for manufacturing in the tie of this embodiment will be described in detail with reference to FIGS. 4 to 7 as follows.

FIG. 4 is a front cross-sectional view illustrating the process of expanding the drum segments of the drum segment moving device of the forming drum for manufacturing tire of FIG. 1, and FIG. 5 is a view illustrating a process of expanding the forming drum to the maximum diameter state through the process of FIG. Fig.

As shown in Figs. 4 (a) and 5 (a), the first drum unit 30 and the second drum unit 30 are rotated by the first and second movable units 50 and 50, When the segments 40 are folded and folded, the first drum segments form an appearance of the minimum diameter d1 of the forming drum (2r1 = d1).

At this time, the second drum segments 40 are engaged with the first bending portion 63a formed on the third movable link 63 and the fourth movable link 66, the third fixed link 64 and the fourth fixed The first drum segments 30 are formed by the second bending portion 64a formed in the link 67 to reduce the folding width relative to the first drum segments 30 to complete the appearance of the minimum diameter of the forming drum (R1 > r2).

As shown in Figs. 4 (b) and 5 (b), when the diameter of the building drum needs to be enlarged to produce a finished article tire having a large size, first, Thereby expanding the drum segments 30 (r2 -> r3).

At this time, when the first double loader cylinder 51 of the first movable unit 50 is operated, the first loader 51a pushes the first movable link 53 to the right side of the drawing through the first movable flange 52 The second loader 51b pulls the second movable link 56 to the right through the second movable flange 55 so that the first drum segments 30 are spread apart at intervals and the maximum diameter of the forming drum d2), which is the outer radius of the protruding portion.

4 (c) and 5 (c), after the first drum segments 30 have been expanded, the first drum segments 30 And the second drum segments 40 are extended to the maximum radius (r2- > r3) with a time lag.

At this time, when the second double loader cylinder 61 of the second movable unit 60 is operated, the first loader 61a pushes the third movable link 63 to the left in the drawing through the third movable flange 62 The second loader 61b pulls the fourth movable link 66 to the right through the fourth movable flange 65 so that the second drum segments 40 are separated from the first extended drum segment 30, To complete the appearance of the maximum diameter d2 of the forming drum (2r3 = d2).

Thus, according to the specifications of the finished product tires to be produced by the second drum segments 40 together with the first drum segments 30, the maximum diameter (d2) A sheet-like inner liner, a body ply, a side wall, a bead and a Nylon Chafer are rolled and compression-molded.

FIG. 6 is a front sectional view showing the process of shrinking the drum segments of the drum segment moving apparatus of the building drum for manufacturing tire of FIG. 1, and FIG. 7 is a view showing a process of shrinking the molding drum to the maximum minimum state through the shrinking process of FIG. Fig.

6 and 7, when the first molding case, which is completed in the maximum diameter state of the expanded forming drum as the first and second drum segments as described above, is lowered to the minimum diameter state The process of shrinking the first drum segments 30 through the first actuating means 50 after first reducing the radius of the second drum segments 40 by the second actuating means 60 The minimum diameter state of the above-mentioned forming drum is achieved.

6 (b) and 7 (b), in the process of reducing the radius of the second drum segments 40 through the second movable unit 60, the second movable unit 60 The first loader 61a pulls the third movable link 63 to the right side of the drawing through the third movable flange 62 and moves the second loader cylinder 61b of the second loader 61b, The fourth movable link 66 is pushed to the right through the fourth movable flange 65 to eventually reduce the radius of the second drum segments 40 to the minimum state (r3-> r2).

6 (c) and Fig. 7 (c), after the second drum segments 40 have been reduced, the second drum segments 40 The first drum segments 30 are reduced to a minimum radius (r3 > r1).

At this time, when the first double loader cylinder 51 of the first movable unit 50 is operated, the first loader 51a pulls the first movable link 53 to the left side in the drawing through the first movable flange 52 The second loader 51b pushes the second movable link 56 to the right through the second movable flange 55 so that the first drum segments 30 are moved to the already collapsed second drum segments 40 (R3 - > r1) so as to complete the appearance of the minimum diameter (d1) of the forming drum.

As such, by reducing to the minimum diameter state of the finished forming drum only by the first drum segments 30, the maximum diameter of the finished forming drum by the first and second extended drum segments 30, So that the completed primary molded case can be drawn out more easily.

As described above, the drum segment moving device 1 of the forming drum for manufacturing tire according to the present invention comprises the first and second drum segments 30 and 40 alternately installed along the circumferential direction of the drum shaft 10, The first and second movable units 50 and 60 linked with the first and second double loader cylinders 51 and 61 are used to expand and contract by a parallax so that the thermal deformation It is possible to obtain a sufficient difference in diameter required for molding and drawing of the primary molded case.

In addition, since the first and second drum segments 30 and 40 can be expanded and contracted with a time difference without being interfered with each other, the configuration of the drum segment moving device 1 can be simplified, And the manufacturing cost can be reduced.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications or changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. In addition, it is natural that it belongs to the scope of the present invention.

1: Drum segment moving device 10: Drum shaft
20: fixed frame 21: first fixing projection
22: second fixing protrusion 30: first drum segment
40: second drum segment 50: first movable means
51: first double loader cylinder 51a: first loader
51b: second loader 52: first movable flange
53: first movable link 54: first fixed link
55: second movable flange 56: second movable link
57: second fixed link 60: second movable means
61: second double loader cylinder 61a: first loader
61b: second loader 62: third movable flange
63: third movable link 64: third fixed link
65: fourth movable flange 66: fourth movable link
67: fourth fixed link

Claims (6)

A plurality of first drum segments installed along the drum shaft circumferential direction;
A plurality of second drum segments alternating with the first drum segments along a circumferential direction of the drum shaft and each installed between the first drum segments;
First operating means for contracting or expanding the first drum segments, respectively, in the radial direction of the drum shaft; And
And second actuating means for contracting or expanding the second drum segments in the radial direction of the drum shaft at a parallax with the first drum segments,

Wherein the first movable means comprises:
The first drum segments are folded so as to abut each other in the circumferential direction so as to complete the appearance of the minimum diameter of the forming drum or to extend at intervals so as to form an appearance of the maximum diameter of the forming drum together with the second drum segments,

Wherein the second movable means comprises:
The second drum segments are in contact with each other in the circumferential direction and fill between the first drum segments reduced or expanded to be received inside the first drum segments, which completes the appearance of the minimum diameter of the forming drum and the maximum of the forming drum. A drum segment actuating device for a forming drum for manufacturing tires, which is formed to expand to complete the appearance of the diameter.
In claim 1,
Wherein the first movable means comprises:
A first double loader cylinder fixed on an outer circumferential surface of a stationary frame fixed to the drum shaft and having respective loaders interlocked with each other in the longitudinal direction of the drum shaft;
A first movable flange movably installed in a longitudinal direction on an outer peripheral surface of one side of the fixed frame;
A first movable link connecting the first movable flange and one end of the first drum segment and operatively connected by a first loader of the first double loader cylinder;
A first stationary link connecting one end of the stationary frame and a center portion of the first movable link and restricting a direction in which the first movable link is folded and unfolded by the first loader;
A second movable flange installed separately from the tile-side end of the fixed frame so as to be movable along the drum shaft;
A second movable link connecting the second movable flange and a tile side end of the first drum segment, the second movable link being connected to a second loader of the first double loader cylinder; And
And a second fixed link connecting a tile side end portion of the fixed frame and a center portion of the second movable link and restricting a direction in which the second movable link is folded and unfolded by the second loader Drum segment actuator.
3. The method of claim 2,
And a first fixing protrusion is formed on the end of the stationary frame at the side of the second movable flange so as to be fitted and fixed in the shaft through hole of the second movable flange moved along the drum shaft when the first drum segment is expanded, DRUG SEPARATOR MOVING DEVICE FOR MANUFACTURING DRUM.
3. The method of claim 2,
Wherein the second movable means comprises:
A second double loader cylinder fixed on the outer circumferential surface of the stationary frame and each loader being formed to be interlocked with the loader on both sides in the longitudinal direction of the drum shaft in different directions;
A third movable flange movably installed in the longitudinal direction on the outer peripheral surface of the fixed frame tile;
A third movable link connecting the third movable flange and the tile side end of the second drum segment, the third movable link connected to the first loader of the second double loader cylinder;
A third fixed link connecting a tile-side end of the fixed frame and a central portion of the third movable link;
A fourth movable flange movably installed along the drum shaft at an outer side of one end of the fixed frame;
A fourth movable link connecting the fourth movable flange and one end of the second drum segment, the fourth movable link being connected to a second loader of the second double loader cylinder;
And a fourth fixed link connecting one end of the fixed frame and the center of the fourth movable link.
5. The method of claim 4,
And a second fixing protrusion is formed on the end of the stationary frame at the side of the fourth movable flange so as to be inserted into the shaft through hole of the second movable flange moved along the drum shaft when the first drum segment is extended, DRUG SEPARATOR MOVING DEVICE FOR MANUFACTURING DRUM.
5. The method of claim 4,
Wherein the third movable link and the fourth movable link are provided with a first bent portion formed by bending a center portion to which the third fixed link and the fourth fixed link are connected,
Wherein the third fixed link and the fourth fixed link are provided with a second bending portion formed by bending the end portions of the third movable link and the fourth movable link.

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