1. A tire production is with four compound tire treads extrusion preliminary lip shapes of conducting structure, there are preliminary lip shapes, characterized by that, the preliminary lip shape includes two side wing rubber channels, two upper crown rubber channels, two lower crown rubber channels, transition rubber channel, conducting rubber channel, a transition rubber and conducting rubber share the channel, shoulder rubber channel, upper crown rubber channel, lower crown rubber channel, transition rubber channel and flank rubber channel, upper crown rubber channel, lower crown rubber channel, transition rubber channel of the opposite side of preliminary lip shape homonymy are distributed symmetrically, the conducting rubber channel has only one, locate at the centre of preliminary lip shape, the preliminary lip shape is right behind and front to relate to four faces totally in the direction, define as upper front, right front, lower front, right back respectively; two side wing rubber channels of the pre-opening type are positioned on the surface of the upper front, two upper crown rubber channels penetrate through the pre-opening type from the upper part of the front rear to the upper part of the front, two lower crown rubber channels penetrate through the pre-opening type from the lower part of the front rear to the lower part of the front, a transition rubber channel is positioned on the surface of the lower front, and a conductive rubber channel is positioned on the lower front and the front; all inlets of the two side wing rubber channels, the upper crown rubber channel, the lower crown rubber channel, the transition rubber and the conductive rubber shared channel are positioned right behind, and all outlets of the corresponding channels are positioned right in front; the conductive adhesive channel and the transition adhesive channel share one inlet, and the outlet of the conductive adhesive channel and the outlet of the transition adhesive channel are combined to form a convex structure.

2. The tire production pre-lip with the conductive structure four-composite tread as claimed in claim 1, wherein the upper tread cap rubber channel, the lower tread cap rubber channel and the transition rubber channel all have intermediate supports, the upper part of the intermediate support of the upper tread cap rubber channel and the lower tread cap rubber channel is flush with the front of the pre-lip, and the distance between the upper top end of the intermediate support of the transition rubber channel and the front of the pre-lip is more than 15 mm.

3. The tire production four-compound tread extrusion pre-lip with a conductive structure as recited in claim 1, wherein the outlets of the upper tread cap rubber channel and the lower tread cap rubber channel are divided into two outlets which are symmetrical left and right by the conductive rubber outlet just in front.

4. The tire production pre-opening form with the conductive structure for the four-composite tread extrusion of the tire production as claimed in claim 1, wherein the upper crown rubber channel, the lower crown rubber channel and the transition rubber channel are arranged in parallel from top to bottom in the front, wherein the upper side and the lower side of the outlet of the upper crown rubber channel are spaced by 10.0mm to 20.0mm, the upper side and the lower side of the outlet of the lower crown rubber channel are spaced by 3.0mm to 6.0mm, and the upper side and the lower side of the outlet of the transition rubber channel are spaced by 2.5mm to 5.0 mm; the distance between the lower edge of the outlet of the upper tire crown rubber channel and the upper edge of the outlet of the lower tire crown rubber channel is 0.5mm, and the distance between the lower edge of the outlet of the lower tire crown rubber channel and the upper edge of the outlet of the transition rubber channel is 0.5 mm.

5. The tire production pre-lip with the conductive structure for the four-composite tread of claim 1, wherein the conductive rubber channel is open, most of the conductive rubber channel is shared with the transition rubber channel, and a small part of the conductive rubber channel is independently arranged in the middle support body of the upper crown rubber channel and the lower crown rubber channel, and the independent part is in a bell mouth shape; the outlet of the conductive adhesive channel is rectangular, the upper side of the rectangle is flush with the upper side of the upper tire crown adhesive outlet, and the horizontal width of the outlet of the conductive adhesive channel is 2.0mm-4.0 mm.

Background

As is well known, with the technological progress of the tire industry, the technological content of tires is higher and higher, the differentiation demand of users is more and more, and the classification of tire products is finer and finer, such as low rolling resistance tires, high moisture resistance pulley tires, high speed snow tires, studded snow tires, mud tires, and the like. According to the current development trend of tire technology, white carbon black is required to be added into a tread formula of the tires with different performances, so that the rolling resistance is reduced, the wet skid resistance is improved, the snow grip performance is improved, the self-cleaning performance of the tires is kept, and the like. The conductivity of the tire is poor along with the increase of the amount of the white carbon black in the tire tread, and the higher the content of the white carbon black is, the poorer the conductivity of the tire is. Especially in dry seasons of autumn and winter in the north, if static electricity generated in the driving process of the vehicle can not be smoothly conducted to the ground through the tire in time, the vehicle body is enriched with static electricity, and potential safety hazards can be brought to driving or riding personnel.

In order to adapt to the development trend of the tire industry and meet the requirement of special performance of tires, a new tire factory has a special tire tread production line for extruding conductive adhesive. However, for the three-compound or four-compound common tread extrusion production line in the current tire factory, the production of the tread with the conductive adhesive is difficult to realize under the current conditions, which greatly restricts the development speed of new products, limits the current equipment to play more efficiency and cannot create more benefits for enterprises.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a four-composite tread extrusion pre-opening type with a conductive structure for tire production, and solves the problem that a common four-composite tread extrusion production line of the existing tire enterprises cannot produce a tread with a conductive function.

The technical scheme adopted by the invention for solving the technical problems is as follows: a tire production is with four compound tire treads extrusion preliminary lip shapes of conducting structure, there are preliminary lip shapes, characterized by that, the preliminary lip shape includes two side wing rubber channels, two upper crown rubber channels, two lower crown rubber channels, transition rubber channel, conducting rubber channel, a transition rubber and conducting rubber share the channel, shoulder rubber channel, upper crown rubber channel, lower crown rubber channel, transition rubber channel and flank rubber channel, upper crown rubber channel, lower crown rubber channel, transition rubber channel of the opposite side of preliminary lip shape homonymy are distributed symmetrically, the conducting rubber channel has only one, locate at the centre of preliminary lip shape, the preliminary lip shape is right behind and front to relate to four faces totally in the direction, define as upper front, right front, lower front, right back respectively; two side wing rubber channels of the pre-opening type are positioned on the surface of the upper front, two upper crown rubber channels penetrate through the pre-opening type from the upper part of the front rear to the upper part of the front, two lower crown rubber channels penetrate through the pre-opening type from the lower part of the front rear to the lower part of the front, a transition rubber channel is positioned on the surface of the lower front, and a conductive rubber channel is positioned on the lower front and the front; all inlets of the two side wing rubber channels, the upper crown rubber channel, the lower crown rubber channel, the transition rubber and the conductive rubber shared channel are positioned right behind, and all outlets of the corresponding channels are positioned right in front; the conductive adhesive channel and the transition adhesive channel share one inlet, and the outlet of the conductive adhesive channel and the outlet of the transition adhesive channel are combined to form a convex structure. The special channel design of the shape of the Chinese character 'tu' formed by combining the conductive adhesive channel outlet and the transition adhesive channel outlet can guide part of the transition adhesive with excellent conductive performance to the upper part of the tire tread to form chimney-shaped conductive adhesive, thereby smoothly realizing the extrusion of the conductive adhesive tire tread.

The upper crown rubber channel, the lower crown rubber channel and the transition rubber channel are all provided with intermediate supports, the upper parts of the intermediate supports of the upper crown rubber channel and the lower crown rubber channel are flush with the front of the pre-opening type, and the distance between the upper top end of the intermediate support of the transition rubber channel and the front of the pre-opening type is larger than 15 mm.

The outlets of the upper crown rubber channel and the lower crown rubber channel are divided into two bilaterally symmetrical outlets by the conductive rubber outlet right in front.

The upper crown rubber channel, the lower crown rubber channel and the transition rubber channel are sequentially arranged in parallel from top to bottom in front, wherein the distance between the upper edge and the lower edge of an outlet of the upper crown rubber channel is 10.0-20.0 mm, the distance between the upper edge and the lower edge of an outlet of the lower crown rubber channel is 3.0-6.0 mm, and the distance between the upper edge and the lower edge of an outlet of the transition rubber channel is 2.5-5.0 mm; the distance between the lower edge of the outlet of the upper tire crown rubber channel and the upper edge of the outlet of the lower tire crown rubber channel is 0.5mm, and the distance between the lower edge of the outlet of the lower tire crown rubber channel and the upper edge of the outlet of the transition rubber channel is 0.5 mm.

The conductive rubber channel is open, most of the conductive rubber channel is shared with the transition rubber channel, a small part of the conductive rubber channel is independently positioned in the middle support body of the upper tire crown rubber channel and the lower tire crown rubber channel, and the independent part is in a horn mouth shape; the outlet of the conductive adhesive channel is rectangular, the upper side of the rectangle is flush with the upper side of the upper tire crown adhesive outlet, and the horizontal width of the outlet of the conductive adhesive channel is 2.0mm-4.0 mm.

The invention has the advantages that for the tire enterprises which only have a common four-composite tread extrusion production line at present, the production of the tread with the conductive adhesive can be realized by only processing a four-composite tread pre-opening type without purchasing new equipment or modifying the existing production line, thereby greatly saving the equipment purchasing and modifying cost, accelerating the development and production progress of new products of high value-added tires which need the conductive adhesive, exerting the maximum value of the equipment and improving the enterprise benefit.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a rear view of the present invention.

Fig. 3 is a side view of the present invention.

Fig. 4 is a schematic plan view of all the channel outlets of the present invention.

Fig. 5 is a schematic plan view of all the channel inlets of the present invention.

FIG. 6 is a schematic view of a tread outer lip plate structure commonly used in tire enterprises.

FIG. 7 is a schematic view of a four-compound tread configuration with conductive rubber.

FIG. 8 is a schematic view of a tread configuration for a four compound thick tread with conductive rubber.

FIG. 9 is a schematic view of a four compound thick transition rubber tread with conductive rubber.

In the figure, 1, a side wing rubber channel, 2, an upper crown rubber channel, 3, a lower crown rubber channel, 4, a transition rubber channel, 5, a conductive rubber channel, 6, a middle support body, 7, an outer mouth template, 8, an outer mouth template opening, 9, an upper front, 10, a front, 11, a lower front, 12, a front back, 13, a side wing rubber channel outlet, 14, an upper crown rubber channel outlet, 15, a conductive rubber channel outlet, 16, a transition rubber channel outlet, 17, a lower crown rubber channel outlet, 18, a side wing rubber channel inlet, 19, an upper crown rubber channel inlet, 20, a lower crown rubber channel inlet, 21, a transition rubber channel inlet, 22, side wing rubber, 23, upper crown rubber, 24, lower crown rubber, 25, 26 and conductive rubber are arranged in a mold.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

As shown in fig. 1, 2 and 3, the pre-lip of the present invention comprises two wing rubber channels 1, two upper crown rubber channels 2, two lower crown rubber channels 3, two transition rubber channels 4 and one conductive rubber channel 5. The side wing rubber channel 1, the upper crown rubber channel 2, the lower crown rubber channel 3 and the transition rubber channel 4 on the same side of the pre-opening type are symmetrically arranged with the side wing rubber channel 1, the upper crown rubber channel 2, the lower crown rubber channel 3 and the transition rubber channel 4 on the other side, and only one conductive rubber channel 5 is arranged at the center of the pre-opening type. The upper, middle, lower and rear of the front-opening front-rear view direction relate to four faces, which are respectively defined as an upper front face 9, a front face 10, a lower front face 11 and a rear face 12. Two side wing rubber channels 1 of the pre-opening type are positioned on the surface of the upper front, two upper crown rubber channels 2 penetrate through the pre-opening type from the upper part of the front rear to the upper part of the front, two lower crown rubber channels 3 penetrate through the pre-opening type from the lower part of the front rear to the lower part of the front, a transition rubber channel 4 is positioned on the surface of the lower front, the major part of a conductive rubber channel 5 is shared with the transition rubber channel 4, and the minor part of the conductive rubber channel is independently positioned in a middle support body of the upper crown rubber channel 2 and the lower crown rubber channel 2. All the inlets of the two wing rubber channels 1, the two upper crown rubber channels 2, the two lower crown rubber channels 3, the transition rubber channel 4 and the conductive rubber channel 5, namely the wing rubber channel inlet 18, the upper crown rubber channel inlet 19, the lower crown rubber channel inlet 20 and the transition rubber channel inlet 21 are positioned right behind 12. All the corresponding outlets, i.e. the shoulder rubber channel outlet 13, the upper crown rubber channel outlet 14, the conductive rubber channel outlet 15, the transition rubber channel outlet 16, and the lower crown rubber channel outlet 17, are located directly in front of the tire 10.

As shown in fig. 1, 2 and 3, the upper top ends of the intermediate supporters 6 of the upper crown rubber channel 2 and the lower crown rubber channel 3 are flush with the front, the distance between the upper top ends of the intermediate supporters 6 of the transition rubber channel 4 and the front is more than 15mm, and the conductive rubber channel 5 is arranged in the intermediate supporters 6 of the upper crown rubber channel 2 and the lower crown rubber channel 3.

As shown in fig. 1 and 4, the upper crown rubber channel 2, the lower crown rubber channel 3, the upper crown rubber channel outlet 14 of the transition rubber channel 4, the lower crown rubber channel outlet 17, and the transition rubber channel outlet 16 are arranged in parallel from top to bottom in sequence at the front 10, wherein the upper and lower widths of the upper crown rubber channel outlet 14 of the upper crown rubber channel 2 are 10.0mm to 20.0mm, the upper and lower widths of the lower crown rubber channel outlet 17 of the lower crown rubber channel 3 are 3.0mm to 6.0mm, and the upper and lower widths of the transition rubber channel outlet 16 of the transition rubber channel 4 are 2.5mm to 5.0 mm. The distance between the lower edge of an upper crown rubber channel outlet 14 of the upper crown rubber channel 2 and the upper edge of a lower crown rubber channel outlet 17 of the lower crown rubber channel 3 is 0.5mm, and the distance between the lower edge of a lower crown rubber channel outlet 17 of the lower crown rubber channel 3 and the upper edge of a transition rubber channel outlet 16 of the transition rubber channel 4 is 0.5 mm.

As shown in fig. 1, 3 and 4, the conductive paste channel 5 is open and is located at the center of the front face 10 and the lower front face 11 of the pre-open type. The inlet of the conductive rubber channel 5 is shared with the inlet of the transition rubber channel 4 (i.e. the transition rubber channel inlet 21), most of the conductive rubber channel 5 is shared with the transition rubber channel 4, and a small part is independently positioned in the intermediate support body of the upper crown rubber channel 2 and the lower crown rubber channel 3. The conductive rubber channel outlet 15 of the conductive rubber channel 5 divides the upper crown rubber channel outlet 14 of the upper crown rubber channel 2 and the lower crown rubber channel outlet 17 of the lower crown rubber channel 3 into two bilaterally symmetrical outlets. The conductive adhesive channel outlet 15 of the conductive adhesive channel 5 is rectangular, the upper side of the conductive adhesive channel is flush with the upper tire crown rubber channel 2, and the width of the conductive adhesive channel is 2.0mm-4.0 mm. The outlet of the transition adhesive channel 4 and the conductive adhesive channel outlet 15 of the conductive adhesive channel 5 are combined to form a convex structure. By this special pre-lip design, part of the transition rubber can be guided over the tread, forming a chimney 26 in the tread extending up and down.

As shown in fig. 5, the side wing rubber channel 1, the upper crown rubber channel 2, the lower crown rubber channel 3, the side wing rubber channel inlet 18 of the transition rubber channel 4, the upper crown rubber channel inlet 19, the lower crown rubber channel inlet 20, and the transition rubber channel inlet 21 are arranged in parallel from top to bottom in sequence right behind the tire 12, the side wing rubber channel inlets 18 of the side wing rubber channel 1 are two and are bilaterally symmetrical, each of the upper crown rubber channel 2 and the lower crown rubber channel 3 has one inlet, namely, the upper crown rubber channel inlet 19 and the lower crown rubber channel inlet 20, and the transition rubber channel 4 and the conductive rubber channel 5 share one inlet, namely, the transition rubber channel inlet 21.

Fig. 7, 8 and 9 are schematic structural diagrams of different compound forms of the tread, and all the structural diagrams are in an axisymmetric structure.

If a tread of the composite form shown in fig. 7 is to be produced, the side flap rubber 22 flows through the side flap rubber channel 1 to the outer mouth plate opening 8 of the outer mouth plate 7 shown in fig. 6, the upper crown rubber 23 flows through the upper crown rubber channel 2 to the outer mouth plate opening 8 of the outer mouth plate 7 shown in fig. 6, the lower crown rubber 24 flows through the lower crown rubber channel 3 to the outer mouth plate opening 8 of the outer mouth plate 7 shown in fig. 6, the transition rubber 25 flows through the transition rubber channel 4 to the outer mouth plate opening 8 of the outer mouth plate 7 shown in fig. 6, part of the transition rubber flows through the conductive rubber channel 5 to the outer mouth plate opening 8 of the outer mouth plate 7 shown in fig. 6, the four types of rubber flowing out from the five channels-side flap rubber 22, upper crown rubber 23, lower crown rubber 24, transition rubber 25 meet inside the outer mouth plate opening 8 of the outer mouth plate 7, flow together through the outer mouth opening 8, extrusion of the composite form tread of fig. 7 is completed.

To produce a tread of the composite form shown in fig. 8, the flank rubbers 22 flow through the flank rubber channels 1 to the outer mouth plate opening 8 of the tread outer mouth plate 7 shown in fig. 6, the upper crown rubber 23 flows through the upper crown rubber channels 2 to the outer mouth plate opening 8 of the tread outer mouth plate 7 shown in fig. 6, the same upper crown rubber flows through the lower crown rubber channels 3 to the outer mouth plate opening 8 of the tread outer mouth plate 7 shown in fig. 6, the transition rubber 25 flows through the transition rubber channels 4 to the outer mouth plate opening 8 of the tread outer mouth plate 7 shown in fig. 6, the same transition rubber flows through the conductive rubber channels 5 to the outer mouth plate opening 8 of the tread outer mouth plate 7 shown in fig. 6, the three rubbers flowing from the five channels — flank rubber 22, upper crown rubber 23, transition rubber 25 meet inside the outer mouth plate opening 8 of the outer mouth plate 7, flow together through the outer mouth opening 8, extrusion of the composite form tread shown in fig. 8 is completed.

To produce a tread of the composite form shown in fig. 9, the flank rubbers 22 flow through the flank rubber channels 1 to the outer mouth plate opening 8 of the tread outer mouth plate 7 shown in fig. 6, the upper crown rubbers 23 flow through the upper crown rubber channels 2 to the outer mouth plate opening 8 of the tread outer mouth plate 7 shown in fig. 6, the transition rubbers 25 flow through the lower crown rubber channels 3 to the outer mouth plate opening 8 of the tread outer mouth plate 7 shown in fig. 6, the same transition rubbers flow through the transition rubber channels 4 to the outer mouth plate opening 8 of the tread outer mouth plate 7 shown in fig. 6, the same transition rubbers flow through the conductive rubber channels 5 to the outer mouth plate opening 8 of the tread outer mouth plate 7 shown in fig. 6, the three rubbers flowing out of the five flow channels — flank rubbers 22, upper crown rubbers 23, transition rubbers 25 meet inside the outer mouth plate opening 8 of the outer mouth plate 7, flow together through the outer mouth plate opening 8, extrusion of the tread of the construction shown in FIG. 9 is completed.

The pre-opening type is used and is loaded into an opening type box of a tread extrusion production line, an extruder is started, the side wing rubber 22, the upper tread rubber 23, the lower tread rubber 24 and the transition rubber 25 respectively flow through respective channels, and tread rubber components with conductive rubber 26 meeting design requirements are obtained by matching with the tread outer opening type plate 7. The extruder screw diameter of the flank rubber 22 is phi 90mm, the extruder screw diameter of the upper tread rubber 23 is phi 250mm, the extruder screw diameter of the lower tread rubber 24 is phi 150mm, and the extruder screw diameter of the transition rubber 25 is phi 120 mm. The rotating speed ranges of screws of four extruders, namely the wing rubber 22, the upper tread rubber 23, the lower tread rubber 24 and the transition rubber 25, are 15-35 r/min, and the speed range of a production line is 20-45 m/min.