CN220576512U - Pre-opening type for preparing composite tread with static electricity conducting function - Google Patents
Pre-opening type for preparing composite tread with static electricity conducting function Download PDFInfo
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- CN220576512U CN220576512U CN202321612290.6U CN202321612290U CN220576512U CN 220576512 U CN220576512 U CN 220576512U CN 202321612290 U CN202321612290 U CN 202321612290U CN 220576512 U CN220576512 U CN 220576512U
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- chimney
- tread rubber
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- 230000003068 static effect Effects 0.000 title claims abstract description 35
- 239000002131 composite material Substances 0.000 title claims abstract description 29
- 230000005611 electricity Effects 0.000 title claims description 27
- 239000006229 carbon black Substances 0.000 claims abstract description 26
- 238000005192 partition Methods 0.000 claims abstract description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 11
- 238000001125 extrusion Methods 0.000 claims abstract description 9
- 239000003292 glue Substances 0.000 claims description 17
- 239000000945 filler Substances 0.000 claims description 7
- 238000013329 compounding Methods 0.000 abstract description 11
- 230000002265 prevention Effects 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 241000872198 Serjania polyphylla Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010070 extrusion (rubber) Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Abstract
The utility model discloses a pre-mouth shape for preparing a composite tread with an electrostatic conduction function, which comprises a pre-mouth shape main body, wherein an upper tread rubber runner and a lower tread rubber runner are separated by a partition plate; at least one channel is formed in the partition plate along the flowing direction of the lower tread rubber channel to serve as a chimney rubber channel, the chimney rubber channel is communicated with the lower tread rubber channel, the chimney rubber channel is not communicated with the upper tread rubber channel, and the outlet of the upper tread rubber channel at the position is sealed by the chimney rubber channel at the outlet of the chimney rubber channel so as to separate the outlet of the upper tread rubber channel; in the tread compounding extrusion process, the lower tread rubber flowing out through the chimney rubber runner can form tread conductive rubber strips for static prevention at intervals in the middle of the upper tread rubber. The method solves the problem that the tire formed by using the upper tread rubber mainly containing white carbon black and the tread half part obtained by pre-mouth type compounding has potential static hazards.
Description
[ field of technology ]
The utility model belongs to the technical field of tire tread production, and particularly relates to a pre-orifice type for preparing a composite tread with an electrostatic conduction function.
[ background Art ]
In the running process of the vehicle, static electricity is generated due to friction between metal parts and friction between tires and the ground, and the existing upper tread rubber material mainly uses carbon black and has the characteristic of low resistance, so that the static electricity of the tires is usually transferred to the ground through an upper tread layer of the automobile tires.
However, in the existing preparation process of the composite tread, the use amount of the white carbon black in the upper tread rubber is increased, so that the conductivity of the upper tread rubber is gradually reduced, the static electricity of the tire cannot be directly led into the ground, and a certain driving danger can be generated due to the existence of the static electricity. Therefore, for the composite tread with higher white carbon black consumption in the upper tread rubber, the composite tread produced by using the conventional pre-mouth mold has potential electrostatic safety hazard.
The usual means for discharging static electricity are: an iron chain is dragged on a vehicle to be landed on a road surface, so that generated charges can be transferred to the ground in time, and the static charge can be conducted and removed at any time; the tire antistatic device can be additionally arranged in the vehicle, but the static electricity discharging effect is unstable.
[ utility model ]
The utility model aims to provide a pre-mouth shape for preparing a composite tread with an electrostatic conduction function, which aims to solve the problem that a tire formed by using an upper tread rubber mainly containing white carbon black and a tread half part obtained by compounding the pre-mouth shape has electrostatic hidden trouble.
The utility model adopts the following technical scheme: the pre-mouth mold for preparing the composite tread with the static electricity conducting function comprises a pre-mouth mold main body, wherein four channels are sequentially arranged on the pre-mouth mold main body from top to bottom, and are respectively a tread wing rubber channel, an upper tread rubber channel, a lower tread rubber channel and a base rubber channel which are not communicated with each other;
wherein the upper tread rubber runner and the lower tread rubber runner are separated by a partition plate; at least one channel is formed in the partition plate along the flowing direction of the lower tread rubber channel to serve as a chimney rubber channel, the chimney rubber channel is communicated with the lower tread rubber channel, the chimney rubber channel is not communicated with the upper tread rubber channel, and the outlet of the upper tread rubber channel at the position is sealed by the chimney rubber channel at the outlet of the chimney rubber channel so as to separate the outlet of the upper tread rubber channel; the cross section of the chimney glue flow passage is trapezoid, the width of the upper side of the trapezoid is 1-2mm, and the width of the lower side of the trapezoid is 3-4mm;
the upper tread rubber runner is used for extruding upper tread rubber with filler mainly containing white carbon black; the lower tread rubber runner is used for extruding lower tread rubber with carbon black as a main filler, wherein the lower tread rubber flowing out of the chimney rubber runner can form tread conductive rubber strips for preventing static at intervals in the middle of the upper tread rubber in the tread compounding extrusion process.
Further, a chimney glue flow passage is arranged at the center of the partition plate.
Further, more than one chimney glue flow channels are uniformly arranged on the partition board at intervals.
Further, the edge at the intersection of the smoke chimney rubber runner and the lower tread rubber runner is ground into a chamfer of 30 degrees.
The beneficial effects of the utility model are as follows: the chimney rubber flow channel is added on the four-flow channel pre-opening type, the tread conductive rubber strip is formed in the upper tread rubber layer in an embedded mode through the chimney rubber flow channel, and as the tread conductive rubber strip and the lower tread rubber layer are made of carbon black, the formula with carbon black as the main component has the characteristic of low resistance, static electricity on the tire can be led into the ground through the contact of the tread conductive rubber strip and the ground, the tire formed by the tread half parts obtained through the four-flow channel pre-opening type compounding has the conductive capability, and the static hidden danger in the running process of a vehicle is simply solved; meanwhile, the structure of the tire tread is changed through the structural change of the pre-opening type, the function of discharging static electricity is realized in the mode, the outer side of the shoulder part of the tire and the outer surface of the pattern groove are still contacted with the ground, and the long-term static electricity prevention effect can be achieved.
[ description of the drawings ]
FIG. 1 is a schematic diagram of a pre-mold structure for preparing a composite tread with static electricity conducting function according to the present utility model;
FIG. 2 is a rear view of FIG. 1;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a cross-sectional view B-B in FIG. 2;
fig. 5 is a schematic view of the structure of a composite tread half obtained by tread composite extrusion using a pre-mold for preparing a composite tread having an electrostatic conductive function of the present utility model.
The tire comprises a pre-opening type main body, a tread wing rubber runner, a base rubber runner, a lower tread rubber runner, an upper tread rubber runner, a chimney rubber runner and a partition plate, wherein the pre-opening type main body is 1;
12. tread wing glue layer, 13, base glue layer, 14, lower tread glue layer, 15, upper tread glue layer, 16, tread conductive adhesive tape.
[ detailed description ] of the utility model
The utility model will be described in detail below with reference to the drawings and the detailed description.
The utility model provides a pre-mouth mold for preparing a composite tread with an electrostatic conduction function, which comprises a pre-mouth mold main body 1, wherein the pre-mouth mold main body 1 is sequentially provided with four channels from top to bottom, the four channels are respectively a tread wing rubber channel 2, an upper tread rubber channel 5, a lower tread rubber channel 4 and a base rubber channel 3, and all the channels are not communicated with each other. The pre-orifice belongs to a four-runner pre-orifice.
The outlet of the tread wing rubber runner 2, the outlet of the upper tread rubber runner 5, the outlet of the lower tread rubber runner 4 and the inlet of the base rubber runner 3 are positioned on the front side of the pre-mouth main body 1; the inlet of the tread wing rubber runner 2, the inlet of the upper tread rubber runner 5, the inlet of the lower tread rubber runner 4 and the outlet of the base rubber runner 3 are all positioned at the rear side of the pre-mouth body 1.
As shown in fig. 3, the upper tread rubber flow channel 5 and the lower tread rubber flow channel 4 are separated by a partition 7. At least one channel is formed in the partition plate 7 along the flowing direction of the lower tread rubber channel 4 to form a chimney rubber channel 6, the chimney rubber channel 6 is communicated with the lower tread rubber channel 4, the chimney rubber channel 6 is not communicated with the upper tread rubber channel 5, and the outlet of the upper tread rubber channel 5 is sealed at the outlet of the chimney rubber channel 6 so as to separate the outlet of the upper tread rubber channel 5. The purpose of the separation is to keep the upper tread band from flowing out at the location where the chimney band flow channel 6 is running out of the band, so that the top surface of the final formed tread strip 16 is exposed. The chimney rubber flow channel 6 is communicated with the lower tread rubber flow channel 4, and the same rubber flows in the two channels, so that the rubber flowing through the chimney rubber flow channel 6 is called chimney rubber, and the rubber flowing through the lower tread rubber flow channel 4 is called lower tread rubber for convenience in description. As shown in fig. 4, a schematic view of a chimney rubber flow channel 6 formed on a partition 7 along the flow direction of the lower tread rubber flow channel 4 is shown.
Wherein, the cross section of the chimney glue flow passage 6 is trapezoid, the width of the upper side in the trapezoid is 1-2mm, and the width of the lower side is 3-4mm. The advantage of this structure is that the pressure will gradually increase from the lower side to the upper side of the chimney glue channel 6, facilitating a better extrusion of the chimney glue from the chimney glue channel 6. The chimney glue flow passage is narrow at the upper part and wide at the lower part, so that the chimney glue can flow into the upper narrow space of the chimney glue flow passage better.
The tire is the only part of the vehicle which is in contact with the ground, and in actual use, the ground contact area of the tire is only 1 footprint size. If the width of the chimney rubber is particularly wide, the area of the white carbon black rubber in the upper tread rubber layer 15 is reduced, which may result in a decrease in the performance of the tire.
According to the utility model, the cross section of the chimney rubber flow channel 6 is in a trapezoid shape, the width of the upper side in the trapezoid shape is 1-2mm, the width of the lower side is 3-4mm, the shape of the finally formed tread conductive rubber strip 16 is a columnar strip with the diameter of about 1mm, and through some experiments, the resistance value of the tire can reach the normal level when the width of the chimney rubber is about 1mm, and the conductive performance of the chimney rubber with the extremely large width is not obviously improved, but the performance of the tire is reduced. Therefore, the cross section of the chimney rubber flow passage 6 is in a trapezoid shape, the width of the upper side of the trapezoid is 1-2mm, and the conductivity of the tire is improved when the width of the lower side of the trapezoid is 3-4mm.
The upper tread rubber runner 5 is used for extruding upper tread rubber with filler mainly white carbon black and compounding and extruding an upper tread rubber layer 15. The main performance of the tire is represented by the tread rubber contacting with the ground, namely the upper tread rubber layer 15, and the application of the white carbon black in the upper tread rubber layer 15 is mainly for achieving the purposes of low rolling resistance, high wet skid resistance and high control, but the conductivity of the rubber material of the upper tread rubber layer 15 is poor along with the increase of the consumption of the white carbon black.
The conductivity of the tread formed from the carbon black-based compound is lower than the conductivity of the tread formed from the white carbon black-based compound. For example, in a test process, detecting a tread of white carbon black with a mass fraction of about 25%, wherein the whole tire resistance is far beyond the national standard; and the whole tire resistance of the tread with the same amount of carbon black formula can reach the standard.
The lower tread rubber runner 4 is used for extruding lower tread rubber with carbon black as a main filler, compounding and extruding a lower tread rubber layer 14, and the lower tread rubber layer 14 is adjacent to and below an upper tread rubber layer 15. The lower tread rubber layer 14 plays a role in buffering, and the formula mainly containing carbon black has the characteristic of low resistance. Part of the lower tread rubber flows out through the chimney rubber flow channel 6, and in the tread compounding extrusion process, the lower tread rubber flowing out through the chimney rubber flow channel 6 forms a tread conductive rubber strip 16 for static prevention in the middle of the upper tread rubber layer 15. The tread strip 16 separates the upper tread band 15 as if a thin strip of tread strip 16 were embedded in the upper tread band 15 of the final formed composite tread. Since the top surface of the tread strip 16 is exposed, the top surface can be in contact with the ground, and since the tread strip 16 is formed of a carbon black based compound, static electricity on the tire can be conducted to the ground after the tread strip 16 contacts the ground.
The lower tread rubber runner 4 is in a rubber feeding direction from the rear side of the pre-opening main body 1 to the front side, and the chimney rubber runner 6 is communicated with the lower tread rubber runner 4, so that the rubber feeding direction of the chimney rubber runner 6 is also from the rear side of the pre-opening main body 1 to the front side, the rear end of the pre-opening and the inlet of the lower tread rubber runner 4 are connected with the extruder, constant pressure can be provided in the rubber extrusion process, the pressure at the outlet becomes gradually larger along with the narrowing of the outlets of the pre-opening, the pressure is equal to the pressure divided by the area, and the smaller area is larger, so that the rubber can flow to a place farther, the pressure is large, the chimney rubber can penetrate to the top of the tread, the pressure is small, the upper tread rubber on the two sides of the chimney rubber runner 6 is extruded to the middle, the purpose of enabling the chimney rubber to be out of the top can not be achieved, and the functions of static electricity guiding and safety problem solving are lost.
In some embodiments, a chimney glue channel 6 is provided in the centre of the partition 7. The tread conductive rubber strip 16 compositely pressed out of the chimney rubber runner 6 is also positioned in the middle area of the composite tread, and the middle area of the tire is always in a grounding state no matter the vehicle turns or runs straight in use, so that the optimal static electricity conducting performance can be maintained.
In some embodiments, more than one chimney glue flow channels 6 are evenly spaced on the separator 7. For tire pattern types where the crown center is a groove, the position of the chimney runner 6 needs to be adjusted so that the composite extruded tread strip 16 can appear on the crown blocks. In this case, 2 or more chimney runners can be used to increase the conductive position so that the position of the tread strip 16 can be grounded regardless of whether the vehicle is turning left or right.
In some embodiments, the edge where the chimney runner 6 meets the lower tread runner 4 is chamfered to a 30 ° chamfer.
As shown in fig. 3, the front side of the pre-orifice body 1 of the partition plate 7 has a relatively thin plate thickness, the rear side of the pre-orifice body 1 of the partition plate 7 has a relatively thick plate thickness, and the side section of the partition plate 7 at the position where the chimney resin flow passage 6 is not formed is triangular or trapezoidal. When the baffle 7 is provided with the chimney rubber flow passage 6, the baffle 7 at the outlet is thinner, so that the outlet of the baffle 7 is arched upwards towards the tread rubber flow passage 5, the outlet of the upper tread rubber flow passage 5 is closed, and the chimney rubber flow passage 6 is ensured not to be communicated with the upper tread rubber flow passage 5; the lower end of the chimney rubber runner 6 is communicated with the lower tread rubber runner 4.
The working process of the pre-mouth shape for preparing the composite tread with the static electricity conducting function comprises the following steps:
the four extruders are connected with four runners of the utility model for preparing the pre-opening type composite tread with the static electricity conducting function, namely, the tread wing rubber runner 2, the upper tread rubber runner 5, the lower tread rubber runner 4 and the base rubber runner 3.
Simultaneously the following extrusion actions are performed:
extruding wing rubber from the tread wing rubber runner 2, and compounding to extrude a tread wing rubber layer 12; extruding base rubber from the base rubber runner 3, and compounding to obtain a base rubber layer 13; extruding lower tread rubber mainly containing carbon black from the lower tread rubber runner 4 to compositely extrude a lower tread rubber layer 14, and compositing the lower tread rubber extruded from the lower tread rubber runner 4 through the chimney rubber runner 6 to extrude a tread conductive rubber strip 16; and extruding upper tread rubber with filler mainly white carbon black from the upper tread rubber runner 5, and compounding to obtain an upper tread rubber layer 15.
Through the extrusion, an electrostatic composite tread is finally formed, as shown in fig. 5, which includes an upper tread rubber layer 15, a lower tread rubber layer 14 and a base rubber layer 13 that are closely attached from top to bottom, wherein two sides of the upper tread rubber layer 15, the lower tread rubber layer 14 and the base rubber layer 13 are respectively tread wing rubber layers 12. The upper tread rubber layer 15 is embedded with at least one tread conductive rubber strip 16, the rubber material of the tread conductive rubber strip 16 is the same as that of the lower tread rubber layer 14 and different from that of the upper tread rubber layer 15, and the outer surface of the tread conductive rubber strip 16 is used for leading out static electricity in a grounding way. The pre-orifice type for preparing the composite tread with the static electricity conducting function can form the tread conductive adhesive tape 16 in the tread composite extrusion process under the condition of not adjusting a runner, so that the static electricity conducting effect of the tire is realized, and the use safety of the tire is improved.
According to the pre-opening type for preparing the composite tread with the static electricity conducting function, the chimney rubber flow channels are added on the four-flow channel pre-opening type, the tread conductive rubber strips are embedded into the upper tread rubber layer through the chimney rubber flow channels, and as the tread conductive rubber strips and the lower tread rubber layer are made of carbon black, the formula with carbon black as the main material has the characteristic of low resistance, static electricity on the tire can be conducted into the ground through the contact of the tread conductive rubber strips and the ground, so that the tire formed by the tread half-parts obtained through the four-flow channel pre-opening type composite has the conductive capability, and the static hidden danger in the running process of a vehicle is simply solved; meanwhile, the structure of the tire tread is changed through the structural change of the pre-opening type, the function of discharging static electricity is realized in the mode, the outer side of the shoulder part of the tire and the outer surface of the pattern groove are still contacted with the ground, and the long-term static electricity prevention effect can be achieved.
Claims (4)
1. The pre-mouth mold for preparing the composite tread with the static electricity conducting function is characterized by comprising a pre-mouth mold main body (1), wherein four channels are sequentially arranged on the pre-mouth mold main body (1) from top to bottom, and are respectively a tread wing rubber flow channel (2), an upper tread rubber flow channel (5), a lower tread rubber flow channel (4) and a base rubber flow channel (3), and are not communicated with each other;
wherein the upper tread rubber runner (5) and the lower tread rubber runner (4) are separated by a partition plate (7); at least one channel is formed in the partition plate (7) along the flowing direction of the lower tread rubber channel (4) to serve as a chimney rubber channel (6), the chimney rubber channel (6) is communicated with the lower tread rubber channel (4), the chimney rubber channel (6) is not communicated with the upper tread rubber channel (5), and the outlet of the upper tread rubber channel (5) is sealed by the chimney rubber channel (6) at the outlet of the chimney rubber channel at the position so as to separate the outlet of the upper tread rubber channel (5); the cross section of the chimney glue flow passage (6) is trapezoid, the width of the upper side of the trapezoid is 1-2mm, and the width of the lower side of the trapezoid is 3-4mm;
the upper tread rubber runner (5) is used for extruding upper tread rubber with filler mainly white carbon black; the lower tread rubber runner (4) is used for extruding lower tread rubber with filler mainly containing carbon black, wherein the lower tread rubber flowing out through the chimney rubber runner (6) can form tread conductive rubber strips (16) for preventing static at intervals in the middle of the upper tread rubber (15) in the tread composite extrusion process.
2. A pre-orifice for preparing a composite tread with electrostatic conductivity according to claim 1, characterized in that one of said chimney neck (6) is arranged in the central position of the separator (7).
3. Pre-orifice for preparing a composite tread with electrostatic conductivity according to claim 1, characterized in that more than one chimney runner (6) is arranged on the separator (7) at uniform intervals.
4. A pre-form for preparing a composite tread with static electricity conducting function according to any of claims 1-3, characterized in that the edge where the chimney runner (6) meets the lower tread runner (4) is chamfered at 30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321612290.6U CN220576512U (en) | 2023-06-25 | 2023-06-25 | Pre-opening type for preparing composite tread with static electricity conducting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321612290.6U CN220576512U (en) | 2023-06-25 | 2023-06-25 | Pre-opening type for preparing composite tread with static electricity conducting function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220576512U true CN220576512U (en) | 2024-03-12 |
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ID=90120253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321612290.6U Active CN220576512U (en) | 2023-06-25 | 2023-06-25 | Pre-opening type for preparing composite tread with static electricity conducting function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220576512U (en) |
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2023
- 2023-06-25 CN CN202321612290.6U patent/CN220576512U/en active Active
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