KR101052797B1 - Preformer dies for dies for tire different tread extrusion - Google Patents

Abstract

The present invention relates to a die for extruding a tread among semi-finished tires, and more particularly, to a preform die constituting an extrusion die and a rubber flow path of the preform die to improve the two types of cap treads. The present invention relates to a preformer die for a mold for tire hetero tread extrusion, in which a compound is applied to extrude a hetero tread having excellent required performance.

To this end, the present invention is heterogeneous to the first preform die holder 5 in which the A tread extrusion head 1 and the B tread extrusion head 2, the sub tread extrusion head 3, and the wing tread extrusion head 4 communicate with each other. The tread preform die 6 and the sub tread preform die 7 are assembled, and the second preform die holders 9 in which the first preform die holder 5 and the final die 8 are assembled are arranged on the second upper and lower sides. In the preformer die of the different tread extrusion die, which is assembled by preform dies (10a, 10b) as a medium, the heterotread tread preform die (6), A tread guide groove 11 and B tread guide groove 12 And a sub tread guide groove 13 is formed in the sub tread preform die 7, and the first preform die holder 5 has an A tread and a sub tread rubber barrel and a hole 14, Insert pin with B-tread and sub-tread rubber pails and holes (15) The reforming die 16 has a structure in which the reforming die 16 is assembled to the preform die 6 for different treads and the preform die 7 for sub treads.

Description

Preformer dies of extruder mold for tire dual-tread extruding}

The present invention relates to a die for extruding a tread among semi-finished tires, and more particularly, to a preform die constituting an extrusion die and a rubber flow path of the preform die to improve the two types of cap treads. The present invention relates to a preformer die for a mold for tire hetero tread extrusion, in which a compound is applied to extrude a hetero tread having excellent required performance.

The process of extruding a molded extrudate having a certain shape conforming to a manufacturing specification through a prescribed die by supplying a compound rubber after the refining (mixing) process in a tire manufacturing process to an extruder is called an extrusion process.

Conventional methods for extruding tread assemblies (wings, caps, subs) among such extrudates have been used as pressure type and overlapping piece type.

In the conventional pressure distribution method, which is a double electron, the first phase preformer 103a and the second lower preformer 103b are assembled to the first preform die holder 101, as shown in FIG. The second phase preformer 110a and the second lower preformer 110b are assembled between the second preform die holders 109 in contact with the holder 101, and a final die is attached to the second preform die holder 109. 106 is assembled to extrude the extrudate tread toward the final die 106, where the preformers 103a, 103b, 110a and 110b are assembled by inserting cassettes. The use of a single layer extruder allows the use of only one cap tread rubber, which extrudes a cap tread that simultaneously satisfies the tire's key performance requirements: dry, snow and ice, and wet. There were many difficulties in manufacturing.

Accordingly, the present invention has been invented to solve the conventional problems as described above, and can improve the rubber flow path of the preform die and the preform die constituting the extrusion mold to extrude different kinds of tread rubber according to the four layers. It is therefore an object of the present invention to provide a preformer die of a mold for dissipating tire heterogeneous treads, which can simultaneously satisfy the main performance requirements of the tire.

In order to achieve the above object, the present invention provides a tread extrusion head, a B tread extrusion head, a sub tread extrusion head, and a wing tread extrusion head to communicate with each other. In the preformer die of the different tread extrusion die, wherein the first preform die holder and the second preform die holders, in which the final die is assembled, are assembled through the second upper and lower preform dies. The die is formed with an A tread guide groove and a B t guide guide groove, the sub tread preform die is formed with a sub tread guide groove, and the first preform die holder has an A tread and a sub tread rubber barrel and a hole, B Heterogeneous tread with insert preform dies with tread and sub tread rubber barrels and holes The assembly corresponding to the preform die and the sub-tread preform die is made of a structure.

The preformer die of the tire hetero tread extrusion mold according to the present invention as described above has the advantage of being able to use a large number of specifications while replacing the preformer of the cassette inserting type according to the size of the final die according to the size of the final die. The preform die for the different treads, the preform die for the sub tread, and the insert preform die are designed to be adjustable according to the profile of the tire, so that they can be applied not only to the symmetric tread but also to the asymmetric tread.

In addition, the present invention has the advantage that it is possible to extrude the heterogeneous tread that satisfies the main performance of the tire at the same time as the extrusion of the different types of tread rubber by improving the flow path of the conventional pressure distribution system.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a cross-sectional view of the assembly of the preformer die of the mold for hetero tread extrusion according to the present invention, Figures 3 to 5 are views of the die according to the present invention.

The present invention is for heterogeneous tread to a first tread extrusion head (1) and a tread extrusion head (2), a sub tread extrusion head (3), and a first preform die holder (5) in which the wing tread extrusion heads (4) communicate. The preform die 6 and the sub-tread preform die 7 are assembled, and the second preform die holders 9 in which the first preform die holder 5 and the final die 8 are assembled are the second upper and lower preform dies. In the preformer die of the different tread extrusion die, which is assembled through (10a, 10b) as a medium, the hetero tread preform die (6) is A tread guide groove 11 and B tread guide groove 12, respectively And a sub tread guide groove 13 formed in the sub tread preform die 7, the first preform die holder 5 having an A tread and a sub tread rubber barrel and a hole 14, and a B Insert preform die with tread and sub tread rims and holes (15) 16 has a structure in which the different types of tread preform dies 6 and the sub tread preform dies 7 are assembled.

Meanwhile, the present invention shows two embodiments of the heterogeneous tread preform die 6 as shown in Figs. 3 and 4, both of which are assembled by cassette insertion.

First, the heterogeneous tread preform die 6 of FIG. 3 is composed of two layers of the heterogeneous tread preform die 6 and the subtread preform die 7, which can be quickly replaced, but is not easily inserted into the insert channel. There is an inconvenience in that the half of the A tread extrusion head 1 and the B tread extrusion head 2 are blocked with rubber oil.

In addition, the heterogeneous tread preform die 6 of FIG. 4 has a three-layer structure in which the heterogeneous tread preform die 6 consists of upper and lower heterogeneous tread preform dies 6a and 6b and a subtread preform die 7. The replacement time is somewhat longer than in the previous embodiment, but it does not need to block the rubber flow path in the insert channel.

The heterotread preform dies 6, 6a and 6b are formed with A-tread guide grooves 11a and 11b and B-tread guide grooves 12a and 12b, respectively. ), The sub tread guide groove 13 is formed.

Figure 5 shows an insert preform die 16 assembled to the first preform die holder 5, which has an A tread and a sub tread rubber barrel and holes 14, a B tread and The sub tread rubber can and the rubber 15 are formed.

The insert preform die 16 can also be assembled in a cassette insert, and can be adjusted like the preform die 6 for heterogeneous treads according to the symmetric tread and the asymmetric tread.

That is, according to the present invention, two different types of tread rubbers are formed through the different types of tread preform die 6, the sub tread preform die 7, and the insert preform die 16 to form a desired interface.

Therefore, the A tread rubber guided through the A tread guide grooves 11a and 11b of the heterogeneous tread preform die 6 passes through the A tread and sub tread rubber barrels and holes 14 of the insert preform die 16. In this case, different types of tread rubbers 17 and 18 pass through the rubber cylinders and the holes 14 and 15 of the insert preform die 16 from side to side.

For reference, the cross-sectional shapes of the A tread rubber 17, the B tread rubber 18, and the sub tread rubber 19 passing through the insert preform die 16 are the same as those of the tread extrudate 21 shown in FIG. 6. And thus, the A tread rubber 17 and the B tread rubber 18 and the sub tread rubber 19 which have passed through the insert preform die 16 pass through the second upper and lower preform dies 10a and 10b and are winged. Combined with rubber 20, and finally through final die 8, it has a profile of tread extrudates 21 having a heterogeneous tread as shown in FIG.

1 is a cross-sectional view showing a die of the former die mold for tread extrusion;

2 is a cross-sectional view of the assembly of the preformer die of the mold for different tread extrusion according to the present invention;

3 is a front view and a side view showing a first embodiment of a first preform die for the first hetero tread in FIG. 2, FIG.

4 is a front view and a side view showing a second embodiment of the second preform die for the second hetero tread in FIG.

5 is a front view of an insert preform die according to the present invention;

6 is a cross-sectional view of a tread extruded using a preformer die of a mold for different tread extrusion according to the present invention.

Explanation of symbols on the main parts of the drawing

1: A tread extrusion head, 2: B tread extrusion head,

3: sub tread extrusion head, 4: wing tread extrusion head,

5: first preform die holder, 6,6a, 6b: preform die for heterogeneous tread,

7: preform die for sub tread, 8: final die,

9: second preform die holder,

10a: second phase preform die 10b: second phase preform die,

11a, 11b: A tread guide groove, 12a, 12b: B tread guide groove,

13: sub tread guide groove,

14: A tread and sub tread rubber barrel and hole,

15: B tread and sub tread rubber barrel and hole,

16: insert preform die, 17: tread rubber,

18: B tread rubber, 19: sub tread rubber,

20: wing rubber, 21: tread extrudate,

101: first preform die holder, 102: wing tread euro,

103a: first phase preform die, 103b: first lower preform die,

109: second preform die holder,

110a: second phase preform die, 110b: second lower preform die,

106: the final die.

Claims (1)

The preform die for the different treads is connected to the first preform die holder 5 in which the A tread extrusion head 1 and the B tread extrusion head 2, the sub tread extrusion head 3, and the wing tread extrusion head 4 are in communication. 6) and the preform die 7 for the sub tread, and the second preform die holders 9 in which the first preform die holder 5 and the final die 8 are assembled are arranged on the second upper and lower preform dies 10a, In the preformer die of the mold for different tread extrusion made by assembling 10b), The hetero tread preform die 6 is formed with an A tread guide groove 11 and a B tread guide groove 12, respectively, and the sub tread preform die 7 has a sub tread guide groove 13 formed therein. The first preform die holder 5 has an insert preform die 16 having A tread and sub tread rubber barrels and holes 14, and a B tread and sub tread rubber barrel and holes 15. (6) and a preformer die for a tire dissimilar tread extrusion die, characterized by being assembled in correspondence with the subform tread preform die (7).

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