CN114643689A - Five compound treads of tire extrude mouth of a mouthful types in advance convenient to tread rubber is extruded - Google Patents

Abstract

The invention relates to the field of tire manufacturing, in particular to a tire five-composite tread extrusion pre-opening type convenient for tread rubber extrusion, which comprises a pre-opening type body, wherein a plurality of rubber material channels with inlets positioned right behind and outlets positioned right in front are arranged on the pre-opening type body, and each rubber material channel comprises: the upper tire crown rubber channel and the lower tire crown rubber channel are located right in front and distributed up and down, the upper tire crown rubber channel and the lower tire crown rubber channel are separated through a transverse rib, and the end face of the transverse rib retracts a certain distance towards the inside of the pre-opening body. The invention has the advantages that when the rubber outlet on the outer opening is small (especially aiming at the condition that the tread rubber is very thin), the upper tread rubber can be combined with the lower tread rubber in the channel, and the upper tread rubber can flow out from the channel more smoothly without being blocked.

Description

Five compound treads of tire extrude mouth of a mouthful types in advance convenient to tread rubber is extruded

Technical Field

The invention relates to the field of tire manufacturing, in particular to a tire five-composite tread extrusion pre-opening type convenient for tread rubber extrusion.

Background

The development of the tire industry in the world is rapid, the development of science and technology drives tire innovation, white carbon black materials are widely applied to tire manufacturing along with the increasing requirements of various aspects of environment protection, low rolling resistance, static resistance, wet skid resistance, grip force for complex road surfaces and the like of tires of passenger vehicles, but the white carbon black content on the tire surface can cause poor conductivity and serious potential safety hazards exist, if the tires run on the road at high speed, static electricity generated by the tires can not be led into the road surface, and the safety of vehicles, people and property can be seriously threatened when the tires run to be dry. Therefore, the problem of electric conduction of the tire with high white carbon black content in the tread rubber needs to be solved.

The technical innovation is accompanied with new research and creation of tires, along with the continuous improvement of life of people, different environments, climates, roads and vehicles have more ideal requirements on the tires of passenger vehicles, the functional attention and research on different parts of the tires are thinner and thinner, different positions of the tires have different performance requirements, such as snow tires, in order to achieve the snow grip performance, the upper crown tire layer of the snow tire should keep better flexibility at low temperature, the tire is ensured to have better snow grip performance, and the lower crown tire layer is required to have enough rigidity to ensure that the tire has good durability. The base rubber needs to have good adhesion performance, smooth tire building and manufacturing, and ensure tire vibration buffering, and similarly, the wing rubber also needs to have good viscosity, and a good tire needs not only excellent design, mature and good process flow and manufacturing, but also excellent design.

At present, most of domestic tire production units are two-compounding, three-compounding and four-compounding extrusion equipment, the pre-opening type produced at present cannot meet the requirement that one pre-opening type not only realizes five-compounding and four-compounding tire treads with conductive adhesive, but also can produce four-compounding and three-compounding tire treads without the conductive adhesive, the tire tread tires in more compounding forms cannot be met according to the development design of new products, and the development of tire enterprises is hindered.

Although there are related patents disclosing a five-compound pre-lip, for example, chinese patent publication No. CN111267319A, published as 20200612 discloses an extrusion pre-lip for a tread of a five-compound tire, which comprises a side wing rubber channel, an upper crown rubber channel, a lower crown rubber channel, a transition rubber channel, and a side wing rubber channel, an upper crown rubber channel, a lower crown rubber channel, and a transition rubber channel arranged symmetrically, wherein the conductive rubber channel is located at the center of the pre-lip.

However, the above-described pre-lip type has the following problems: the outer end face of the connecting rib separating the upper tire crown rubber channel from the lower tire crown rubber channel in the pre-opening type is coplanar with the outer end face of the pre-opening type, the thickness of an opening in the outer opening type (namely a sample plate for extruding rubber materials) is small, only a small gap exists between the outlet of the upper tire crown rubber channel and the outlet in the outer opening type, the upper tire crown rubber is difficult to extrude, meanwhile, the upper tire crown rubber occupies a large specific gravity in the rubber materials, the flowing pressure of the upper tire crown rubber is large, the upper tire crown rubber is accumulated in the channel, the pressure borne by the connecting rib is large, and the long-time use of the pre-opening type is not facilitated.

Disclosure of Invention

In order to solve the above problems, an object of the present invention is to provide a tire five-compound tread extrusion pre-opening for facilitating tread rubber extrusion, wherein the isolation rib between the upper crown rubber and the lower crown rubber is retracted to the inner side of the channel by a distance, so that the upper crown rubber is combined with the lower crown rubber in the channel and can smoothly flow out.

For the purpose of the invention, the following technical scheme is adopted for implementation:

the utility model provides a five compound treads of tire extrude mouthful of type in advance convenient to tread rubber extrudes, includes mouthful of type body in advance, is provided with a plurality of entrances in advance on the type body and is located just the back, and the export is located the sizing material passageway in front just, and the sizing material passageway includes: the upper tire crown rubber channel and the lower tire crown rubber channel are located right in front and distributed up and down, the upper tire crown rubber channel and the lower tire crown rubber channel are separated through a transverse rib, and the end face of the transverse rib retracts a certain distance towards the inside of the pre-opening body.

Preferably, the distance of the setback is 10 to 70 mm.

Preferably, the size channel further comprises: the conductive adhesive channel is positioned in the middle of the right upper inclined plane, the wing adhesive channels are positioned on the left side and the right side of the right upper inclined plane, and the base adhesive channel is positioned on the right lower inclined plane; the conductive adhesive channel and the upper tire crown adhesive channel are separated by the upper isolation rib which extends transversely, so that the conductive adhesive channel forms an independent channel.

Preferably, an upper portion of the conductive paste channel is provided with an opening opened upward.

Preferably, the outlet of the conductive adhesive channel is located in the middle of the pre-opening body in the left-right direction, the thickness of the outlet is 20-40 mm, and the width of the outlet is 20-50 mm.

Preferably, the thickness of the upper isolation rib is 2-10 mm.

Preferably, the outlet positions of the left wing rubber channel and the right wing rubber channel are bilaterally symmetrical about the center line of the pre-mouth body, and the outlet positions of the upper crown rubber channel, the lower crown rubber channel and the base rubber channel are bilaterally symmetrical about the center line of the pre-mouth body.

Preferably, the lower crown rubber channel and the base rubber channel are separated by a lower isolation rib, and the thickness of the lower isolation rib is 1-5 mm.

Preferably, the outlet thickness of the upper crown rubber channel is 4-10 mm, the outlet thickness of the lower crown rubber channel is 1-5 mm, and the outlet thickness of the base rubber channel is 1-5 mm; the transverse widths of the upper crown rubber channel, the lower crown rubber channel and the base rubber channel are 100-400 mm; the oblique isolation ribs are arranged at the joints of the side walls of the left side and the right side of the upper tire cap rubber channel and the side walls of the lower tire cap rubber channel and the inner side walls of the wing rubber channels, and the included angle between each oblique isolation rib and each lower isolation rib is 10-80 degrees.

In summary, the invention has the advantages that when the rubber outlet on the outer mouth is small (especially for the situation that the tread rubber is very thin), the upper tread rubber can be combined with the lower tread rubber in the channel, and the upper tread rubber can flow out from the channel smoothly without being blocked.

Drawings

Fig. 1 is a perspective view of a pre-lip.

Fig. 2 is a schematic structural view of the front face of the pre-die.

Fig. 3 is a schematic structural view of the back surface of the pre-die.

Fig. 4 is a cross-sectional view taken at a-a in fig. 2.

Fig. 5 is a partially enlarged view of fig. 4 at B.

Fig. 6 is a schematic structural view of the back surface of the outer die.

Fig. 7 is a schematic structural view of the outer mouth-shaped front surface.

Fig. 8 is a schematic diagram of exploded structures of an outer die and an insert.

FIG. 9 is a schematic view of the insert structure.

FIG. 10 is a schematic diagram of a dual-composite structure.

Fig. 11 is a schematic diagram of a triple-composite structure.

Fig. 12 is a schematic structural diagram of the four composite tape conductive adhesives.

FIG. 13 is a schematic structural view of a four composite crown bi-layer.

Fig. 14 is a schematic diagram of a quintuplex structure.

Detailed Description

As shown in fig. 1, a tire five-compound tread extrusion pre-opening type comprises a pre-opening type body, wherein the pre-opening type body is trapezoidal when viewed from the side, and for convenience of the subsequent description of the relative position of the structure on the pre-opening type body, the surface of the pre-opening type body is firstly named in the following way: the area located in the middle of the front face of the pre-mouth-shaped body is defined as a front face, the area located at the upper part of the front face of the pre-mouth-shaped body is defined as an upper inclined face, the area located at the lower part of the front face of the pre-mouth-shaped body is defined as a lower inclined face, and the area located at the back of the pre-mouth-shaped body is defined as a back face.

As shown in fig. 2 and 3, a conductive adhesive channel 1 extending in the front-rear direction is provided in the middle of the upper inclined plane, and an opening is provided in the upper portion of the conductive adhesive channel 1, the inlet of the conductive adhesive channel 1 is located in the upper portion of the rear face, and the outlet is located in the middle of the front face. The conductive adhesive channel 1 is an inclined plane with a higher back side and a lower front side when viewed from the side of the pre-die body. The conducting resin is because of the design variety of position, and the thickness of 1 export in conducting resin passageway is 20~40mm, and the width is set for 20~50 mm. According to the position of a tire pattern groove, the design requirement that the distance between the tire pattern groove and the middle point of the tread type rubber is within 0-50 mm is met, and a wide groove with the width of 1-5 mm of the conductive rubber is embodied in the outer opening type 9.

As shown in fig. 2 and 3, a wing rubber channel 2 extending in the front-rear direction is provided on both the left and right sides of the right upper slope, and the left and right wing rubber channels 2 are symmetrically provided. The upper part of the wing rubber channel 2 is provided with an opening which is opened upwards, the inlet of the wing rubber channel 2 is positioned at the upper part of the right back, and the outlet is positioned at the middle part of the right front. The wing glue channel 2 gradually gets closer to the middle from back to front when seen from the front of the pre-mouth body. The wing glue channel 2 is an inclined plane with a higher back side and a lower front side when viewed from the side of the pre-mouth-shaped body.

As shown in fig. 2 and fig. 3, an upper crown rubber channel 3 and a lower crown rubber channel 4 which are distributed up and down and are isolated from each other are arranged right in front of the wing rubber channel, the upper crown rubber channel 3 is positioned below the conductive rubber 1, and the left side and the right side of the upper crown rubber channel 3 and the lower crown rubber channel 4 are positioned between the left wing rubber channel and the right wing rubber channel 2. The upper crown rubber channel 3 and the lower crown rubber channel 4 extend from back to front, the respective inlets are positioned in the middle of the front back and distributed up and down, and the respective outlets are positioned in the middle of the front back and distributed up and down. Wherein, the export thickness of going up crown rubber passageway 3 is 4~10mm, and the export thickness of lower crown rubber passageway 4 is 1~5 mm. From the front of the pre-mouth body, the upper crown rubber channel 3 and the lower crown rubber channel 4 gradually get close to the middle from back to front. Seen from the side surface of the pre-opening body, the upper crown rubber channel 3 is an inclined plane with a higher rear side and a lower front side, and the lower crown rubber channel 4 is an inclined plane with a lower rear side and a higher front side.

As shown in fig. 2 and 3, a base rubber channel 5 extending in the front-rear direction is provided on the just-under slope, the base rubber channel 5 is located below the lower crown rubber channel 4, and the left and right sides of the base rubber channel 5 are located between the left and right wing rubber channels 2. The entrance of the base glue channel 5 is located at the lower part of the right back, the exit is located at the lower part of the right front, and the thickness of the exit is 1-5 mm. The base glue channel 5 gradually converges from the rear to the front towards the middle, seen from the front of the pre-lip body. The base glue channel 5 is a slope with a lower back side and a higher front side, seen from the side of the pre-lip body.

As shown in fig. 2, when viewed from the front of the pre-die body, the conductive adhesive channels 1 are arranged in the upper middle position, and the wing adhesive channels 2 are arranged on both sides of the upper middle position and are arranged in bilateral symmetry. The upper crown rubber channel 3, the lower crown rubber channel 4 and the base rubber channel 5 are sequentially arranged in parallel at the upper, middle and lower positions, and the central lines are bilaterally symmetrical.

As shown in FIGS. 4 and 5, the conductive adhesive channel 1 and the upper crown rubber channel 3 are separated by an upper isolation rib 6, and the thickness of the upper isolation rib 6 is 2-10 mm. Go up crown rubber channel 3 and separate through horizontal muscle 7 between the crown rubber channel 4 down, the thickness of horizontal muscle 7 is 1~5 mm. Separate through spacer bar 8 down between crown rubber channel 4 and the base rubber channel 5 down, spacer bar 8's thickness is 1~5mm down. The upper crown rubber, the lower crown rubber and the base rubber cavity are designed according to the design requirements of different widths of the molding rubber, and the transverse widths of the upper crown rubber channel 3, the lower crown rubber channel 4 and the base rubber channel 5 are 100-400 mm. The oblique isolation ribs 10 are arranged at the joints of the side walls of the left side and the right side of the upper tire cap rubber channel 3 and the side walls of the lower tire cap rubber channel 4 and the inner side walls of the wing rubber channels 2, the oblique isolation ribs 10 determine the angle of a boundary surface between the upper wing rubber and the main rubber of the tire tread rubber, and the included angle between the oblique isolation ribs 10 and the lower isolation ribs 8 is 10-80 degrees.

After adopting above-mentioned structure, have the following effect: the conductive adhesive channel 1 is an upward opening channel in an independent opening mode and is positioned on the right upper inclined plane of the pre-opening type body, so that the position requirements of different conductive adhesives with right deviation are met to the maximum extent. More specifically, the conductive adhesive needs to be positioned on the pattern blocks after being formed to realize the conductive effect, and the positions of the pattern blocks of different tires are different, so that the positions of the conductive adhesive need to be adjusted when the conductive adhesive passes through the conductive adhesive channel.

The invention has the advantages that not only can five-compound tire treads be extruded, but also four-compound, three-compound and two-compound tire treads can be extruded, more importantly, the position of the conductive adhesive can be flexibly deviated by different patterns, and the complex tire design with different compound forms and different performance requirements can be met.

The structure of the outer mouth 9 is briefly described below, and as shown in fig. 7 and 8, the outer mouth 9 includes an upper outer mouth body 91 and a lower outer mouth body 92 which are separable from each other, a glue outlet 93 is formed at a joint of the upper outer mouth body 91 and the lower outer mouth body 92, and the thickness of the glue outlet 93 is generally 5 to 15 mm. As shown in fig. 8 and 9, in order to control the position of the conductive adhesive, a mounting groove 911 is provided on the upper outer mouth-shaped body 91, an insert 94 is detachably mounted in the mounting groove 911, a drainage hole 941 communicating with the conductive adhesive channel 1 is provided on the insert 94, a drainage channel 942 is provided at the end of the drainage hole 941, and the width of the drainage channel 942 is 1-5 mm. The drainage channel 942 extends downwardly into the glue outlet 93. When the conductive adhesive is extruded, the conductive adhesive firstly enters the conductive adhesive channel 1, flows along the conductive adhesive channel 1, enters the drainage holes 941 of the insert 94, and finally enters the drainage channel 942, i.e. is compounded with other adhesives. When the position of the conductive adhesive relative to the center of the tread rubber needs to be changed, only different inserts 94 need to be replaced or the outer die 9 needs to be redesigned, so that different drainage channels 942 can be provided, and the position of the conductive adhesive is changed under the condition of sharing the pre-die.

Fig. 10 to 14 show different compound forms of treads made of the pre-lip of the present invention.

Meanwhile, the tread rubber, namely the upper crown rubber and the lower crown rubber are rubber materials with the largest flowing amount, so that the problems that the upper crown rubber and the lower crown rubber cannot be extruded smoothly and the flowing pressure is large are solved in order to avoid the condition that the thickness of the outer-opening rubber outlet 93 is not enough to meet the requirement of the upper crown rubber and the lower crown rubber entering together, as shown in fig. 5, the transverse ribs 7 between the upper crown rubber channel 3 and the lower crown rubber channel 4 are retracted to the inner side of the channels by a certain distance, and the distance between the end faces of the transverse ribs 7 retracted inwards and the end faces of the pre-opening type body is preferably 10-70 mm. The advantage of this design is that when the rubber outlet 93 on the outer die is small, especially for the case of very thin tread rubber, the upper tread rubber can be combined with the lower tread rubber in the channel, and a relatively smooth channel can be flowed out without being blocked. More specifically, the thickness of the whole glue outlet 93 on the outer die is generally 5-8 mm, and as mentioned above, the thickness of the transverse rib 7 on the pre-die is 1-5 mm, and if the outer end surface of the transverse rib 7 and the outer end surface of the pre-die are coplanar as in the prior art, the upper tire crown glue channel 3 will be blocked by the rib, and cannot flow out smoothly from the channel.

Claims (9)

1. The utility model provides a five compound treads of tire extrude mouth of a mouthful type in advance convenient to tread rubber is extruded, includes mouthful type body in advance, is provided with a plurality of entrances on the mouth type body in advance and is located just behind, and the export is located the sizing material passageway just in front, and the sizing material passageway includes: be located just ahead and become upper crown rubber passageway (3) and lower crown rubber passageway (4) that distribute from top to bottom, its characterized in that, separates through horizontal muscle (7) between upper crown rubber passageway (3) and lower crown rubber passageway (4), and the terminal surface of horizontal muscle (7) is to the inside indentation one section distance of mouthful type body in advance.

2. The tire five-compound tread extrusion pre-opening type convenient for tread rubber extrusion of claim 1, wherein the indentation distance is 10-70 mm.

3. A tire five compound tread extrusion pre-lip to facilitate tread rubber extrusion as in claim 1, wherein the rubber compound channel further comprises: the conductive adhesive channel (1) is positioned in the middle of the upper inclined plane, the wing adhesive channels (2) are positioned on the left side and the right side of the upper inclined plane, and the base adhesive channel (5) is positioned on the lower inclined plane; the conductive rubber channel (1) is separated from the upper crown rubber channel (3) through an upper isolation rib (6) extending transversely, so that the conductive rubber channel (1) forms a single channel.

4. A tire five-compound tread extrusion pre-lip for facilitating tread rubber extrusion as claimed in claim 3, wherein the upper part of the conductive rubber channel (1) is provided with an opening opened upward.

5. The tire five-composite tread extrusion pre-opening type convenient for tread rubber extrusion as claimed in claim 3, wherein the outlet of the conductive rubber channel (1) is located at the middle position of the pre-opening type body in the left and right direction, the thickness of the outlet is 20-40 mm, and the width of the outlet is 20-50 mm.

6. The tire five-compound tread extrusion pre-opening type convenient for tread rubber extrusion of claim 3, wherein the thickness of the upper isolation rib (6) is 2-10 mm.

7. The tire five-compound tread extrusion pre-mouth shape convenient for tread rubber extrusion is characterized in that the outlet positions of the left wing rubber channel and the right wing rubber channel (2) are bilaterally symmetrical about the center line of the pre-mouth shape body, and the outlet positions of the upper crown rubber channel (3), the lower crown rubber channel (4) and the base rubber channel (5) are bilaterally symmetrical about the center line of the pre-mouth shape body.

8. The tire five-compound tread extrusion pre-opening type convenient for tread rubber extrusion is characterized in that the lower crown rubber channel (4) and the base rubber channel (5) are separated by a lower isolation rib (8), and the thickness of the lower isolation rib (8) is 1-5 mm.

9. The tire five-compound tread extrusion pre-mouth shape convenient for tread rubber extrusion is characterized in that the outlet thickness of the upper tread rubber channel (3) is 4-10 mm, the outlet thickness of the lower tread rubber channel (4) is 1-5 mm, and the outlet thickness of the base rubber channel (5) is 1-5 mm; the transverse widths of the upper crown rubber channel (3), the lower crown rubber channel (4) and the base rubber channel (5) are 100-400 mm; the oblique isolation rib (10) is arranged at the joint of the side walls of the left side and the right side of the upper tire crown rubber channel (3) and the lower tire crown rubber channel (4) and the inner side wall of the wing rubber channel (2), and the included angle between the oblique isolation rib (10) and the lower isolation rib (8) is 10-80 degrees.

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