CN111361042A - Control method for mixing process of internal mixer - Google Patents
Control method for mixing process of internal mixer Download PDFInfo
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- CN111361042A CN111361042A CN202010294914.9A CN202010294914A CN111361042A CN 111361042 A CN111361042 A CN 111361042A CN 202010294914 A CN202010294914 A CN 202010294914A CN 111361042 A CN111361042 A CN 111361042A
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- top bolt
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- rubber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/06—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices
- B29B7/10—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary
- B29B7/18—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with more than one shaft
- B29B7/183—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with more than one shaft having a casing closely surrounding the rotors, e.g. of Banbury type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/22—Component parts, details or accessories; Auxiliary operations
- B29B7/28—Component parts, details or accessories; Auxiliary operations for measuring, controlling or regulating, e.g. viscosity control
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention relates to a method for controlling a mixing process of an internal mixer, in particular to a method for controlling a mixing process of an internal mixer of an all-steel truck radial tire. The invention controls the time and the energy, the energy is accumulated along with the time and is irrelevant to the temperature, so the glue is discharged after reaching certain energy regardless of the inaccuracy of the thermocouple of the internal mixer, the actual temperature is a certain value, and the problems of waste of the aged glue caused by over-high temperature and poor dispersion of powder materials such as carbon black caused by over-low temperature are avoided. Energy is the product of power and time, and power is related to current and voltage, so long as the current and voltage of each car of rubber compound are stable, the uniformity and consistency of rubber compound between different cars can be increased. By controlling time and energy, the invention can improve the dispersion degree of powder materials such as carbon black and the like in rubber, improve the mixing uniformity and consistency of rubber materials of different vehicle numbers, ensure the stability of the rubber mixing process and reduce the scrappage of the rubber materials.
Description
Technical Field
The invention relates to a method for controlling a mixing process of an internal mixer, in particular to a method for controlling a mixing process of an internal mixer of an all-steel truck radial tire.
Background
In the conventional control of the mixing process of an internal mixer, there are generally four methods such as time control, temperature control, time and temperature control, time or temperature control. These four methods have certain defects, such as the mixing temperature may be too high or too low during single time control; during single temperature control, the temperature at a certain point is concentrated and reaches a very high value, so that the phenomenon that glue is discharged after the glue is fed into the glue material for several seconds occurs, the glue material is not well mixed, and an operator needs to manually process the glue material, so that time and labor are wasted; the accuracy of the thermocouple is worse and worse along with the increase of the service time of the internal mixer during time and temperature control, and the difference between the displayed temperature and the actually required temperature is larger during time and temperature control, so that the poor mixing or over-mixing of the rubber material is caused.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for controlling the mixing process of an internal mixer aiming at the defects of the prior art. By controlling time and energy, the invention not only can improve the dispersion degree of powder materials such as carbon black and the like in rubber, but also can improve the mixing uniformity and consistency of rubber materials of different batches, ensure the stability of the rubber mixing process and reduce the scrappage of the rubber materials.
In order to solve the technical problems, the invention adopts the following technical scheme: a method for controlling the mixing process of an internal mixer by adopting time and energy control comprises the following steps:
(1) a first section of masterbatch: raw rubber, small materials and 2/3 carbon black enter an internal mixer, a feeding door is closed, then a top bolt is pressed, the holding time of the top bolt is 15-20 seconds, the energy reaches 4-8 joules, the top bolt is lifted to be in place, the rest 1/3 carbon black is added, the top bolt is pressed, the holding time is 15-20 seconds, the energy reaches 8-12 joules, the top bolt is cleaned, the holding time is 3-5 seconds, then the top bolt is pressed for 10-15 seconds, the energy reaches 12-15 joules, the top bolt is lifted to be in place, a discharging door is opened, rubber is discharged, and a discharging door is closed;
(2) second-stage masterbatch: after a section of masterbatch or a section of masterbatch, small materials and carbon black enter an internal mixer, closing a feeding door, then pressing a top bolt, keeping the time for pressing the top bolt for 10-20 seconds, and the energy for 3-6 joules, lifting the top bolt to be in place, pressing the top bolt, keeping the time for 15-25 seconds, and the energy for 8-12 joules, lifting the top bolt to be in place, opening a discharging door to discharge the rubber, and closing the discharging door;
(3) final mixing rubber: and (3) closing the feeding door after the two-section masterbatch and the small finished material enter the internal mixer, then pressing the top bolt, keeping the time for pressing the top bolt for 15-25 seconds, enabling the energy to reach 2-4 joules, lifting the top bolt to be in place, pressing the top bolt, keeping the time for 15-25 seconds, enabling the energy to reach 4-6 joules, lifting the top bolt to be in place, opening the discharging door to discharge the masterbatch, and closing the discharging door.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, time and energy are controlled, the energy is accumulated along with the time and is independent of the temperature, so that the rubber is discharged after a certain energy is reached regardless of the accuracy of a thermocouple of an internal mixer, the actual temperature is a certain value, and the problems of waste of the aged rubber caused by over-high temperature and poor dispersion of powder materials such as carbon black caused by over-low temperature are avoided.
2. The energy is the product of power and time, the power is related to current and voltage, as long as the current and voltage of each rubber compound are stable, the uniformity and consistency of the rubber compound between different vehicle numbers can be increased, the current and voltage meters are arranged on the internal mixer, the energy value can be directly read out through the program setting of the programmable controller, the operation is simple, and the control is easy.
In conclusion, the invention can improve the dispersion degree of powder materials such as carbon black and the like in rubber, also can improve the mixing uniformity and consistency of rubber materials of different batches by controlling time and energy, ensures the stability of the rubber mixing process and can reduce the scrappage of the rubber materials.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples.
Example 1
A method for controlling the mixing process of an internal mixer by adopting time and energy control comprises the following steps:
(1) a first section of masterbatch: raw rubber, small materials and 2/3 carbon black enter an internal mixer, a charging door is closed, then a top bolt is pressed, the holding time of the top bolt is 15 seconds, the energy reaches 4 joules, the top bolt is lifted to be in place, the residual 1/3 carbon black is added, the top bolt is pressed, the holding time is 15 seconds, the energy reaches 8 joules, the top bolt is lifted to be cleaned, the holding time is 3 seconds, then the top bolt is pressed to be held for 10 seconds, the energy reaches 12 joules, the top bolt is lifted to be in place, a discharging door is opened to discharge rubber, and the discharging door is closed.
(2) Second-stage masterbatch: and (3) closing the feeding door after a section of masterbatch or a section of masterbatch, small materials and carbon black enter the internal mixer, then pressing the top bolt, keeping the time for 10 seconds when the top bolt is pressed, enabling the energy to reach 3 joules, lifting the top bolt to be in place, pressing the top bolt, keeping the time for 15 seconds, enabling the energy to reach 8 joules, lifting the top bolt to be in place, opening the discharging door to discharge the masterbatch, and closing the discharging door.
(3) Final mixing rubber: and (3) closing the charging door after the second-section masterbatch and the final small-sized material enter the internal mixer, then pressing the top bolt, keeping the time for pressing the top bolt for 15 seconds, enabling the energy to reach 2 joules, lifting the top bolt to be in place, pressing the top bolt for 15 seconds, enabling the energy to reach 4 joules, lifting the top bolt to be in place, opening the discharging door to discharge the masterbatch, and closing the discharging door.
In this example, the rotation speed was set to 50 revolutions and the pressure was set to 18MPa in the primary and secondary masterbatch kneading processes, and the rotation speed was set to 25 revolutions and the pressure was set to 18MPa in the final rubber kneading process.
Example 2
A method for controlling the mixing process of an internal mixer by adopting time and energy control comprises the following steps:
(1) a first section of masterbatch: raw rubber, small materials and 2/3 carbon black enter an internal mixer, a charging door is closed, then a top bolt is pressed, the holding time of the top bolt is 18 seconds, the energy reaches 6 joules, the top bolt is lifted to be in place, the residual 1/3 carbon black is added, the top bolt is pressed, the holding time is 15-20 seconds, the energy reaches 8-12 joules, the top bolt is cleaned, the holding time is 4 seconds, then the top bolt is pressed to be held for 12 seconds, the energy reaches 13.5 joules, the top bolt is lifted to be in place, a discharging door is opened, rubber is discharged, and the discharging door is closed.
(2) Second-stage masterbatch: and (3) closing the feeding door after a section of masterbatch or a section of masterbatch, small materials and carbon black enter the internal mixer, then pressing the top bolt, keeping the time for pressing the top bolt for 15 seconds, enabling the energy to reach 4.5 joules, lifting the top bolt to be in place, pressing the top bolt, keeping the time for 20 seconds, enabling the energy to reach 10 joules, lifting the top bolt to be in place, opening the discharging door to discharge the rubber, and closing the discharging door.
(3) Final mixing rubber: and (3) closing the charging door after the second-section masterbatch and the final small-sized material enter the internal mixer, then pressing the top bolt, keeping the time for pressing the top bolt for 20 seconds, enabling the energy to reach 3 joules, lifting the top bolt to be in place, pressing the top bolt for 20 seconds, enabling the energy to reach 5 joules, lifting the top bolt to be in place, opening the discharging door to discharge the masterbatch, and closing the discharging door.
Example 3
A method for controlling the mixing process of an internal mixer by adopting time and energy control comprises the following steps:
(1) a first section of masterbatch: raw rubber, small materials and 2/3 carbon black enter an internal mixer, a charging door is closed, then a top bolt is pressed, the holding time of the top bolt is 20 seconds, the energy reaches 8 joules, the top bolt is lifted to be in place, the residual 1/3 carbon black is added, the top bolt is pressed, the holding time is 20 seconds, the energy reaches 12 joules, the top bolt is lifted to be cleaned, the holding time is 5 seconds, then the top bolt is pressed to be held for 15 seconds, the energy reaches 15 joules, the top bolt is lifted to be in place, a discharging door is opened to discharge rubber, and the discharging door is closed.
(2) Second-stage masterbatch: and (3) closing the feeding door after a section of masterbatch or a section of masterbatch, small materials and carbon black enter the internal mixer, then pressing the top bolt, keeping the time for pressing the top bolt for 20 seconds, enabling the energy to reach 6 joules, lifting the top bolt to be in place, pressing the top bolt, keeping the time for 25 seconds, enabling the energy to reach 12 joules, lifting the top bolt to be in place, opening the discharging door to discharge the masterbatch, and closing the discharging door.
(3) Final mixing rubber: and (3) closing the charging door after the second-section masterbatch and the final small-sized material enter the internal mixer, then pressing the top bolt, keeping the time for pressing the top bolt for 25 seconds, enabling the energy to reach 4 joules, lifting the top bolt to be in place, pressing the top bolt for 25 seconds, enabling the energy to reach 6 joules, lifting the top bolt to be in place, opening the discharging door to discharge the masterbatch, and closing the discharging door.
Comparative example 1
A method for controlling the mixing process of an internal mixer by adopting time control comprises the following steps:
(1) a first section of masterbatch: raw rubber, small materials and 2/3 carbon black enter an internal mixer, a charging door is closed, then a top bolt is pressed, the holding time of the top bolt is 20 seconds, the top bolt is lifted to be in place, the residual 1/3 carbon black is added, the top bolt is pressed, the holding time is 20 seconds, the top bolt is lifted, then the top bolt is pressed to be held for 15 seconds, the top bolt is lifted to be in place, a discharging door is opened to discharge rubber, and the discharging door is closed.
(2) Second-stage masterbatch: and (3) closing the feeding door after a section of masterbatch or a section of masterbatch, small materials and carbon black enter the internal mixer, then pressing the top bolt, keeping the time for pressing the top bolt for 25 seconds, lifting the top bolt to be in place, pressing the top bolt, keeping the time for 15 seconds, lifting the top bolt to be in place, opening the discharging door to discharge the masterbatch, and closing the discharging door.
(3) Final mixing rubber: and (3) closing the feeding door after the second-section masterbatch and the final-refined small material enter the internal mixer, then pressing a top bolt, keeping the time for pressing the top bolt for 20 seconds, lifting the top bolt to be in place, pressing the top bolt, keeping the time for 15 seconds, lifting the top bolt to be in place, opening the discharging door to discharge the masterbatch, and closing the discharging door.
TABLE 1 comparison of the Properties of the rubber mixtures obtained in examples 1 to 3 with comparative example 1
Table 2 comparison of properties between different runs in example 1
It can be seen from table 1 that, in examples 1 to 3 of the present application, a time and energy control method is adopted, the dispersion degree of the rubber material reaches more than 7.5, which is much higher than the control method of simple time in the reference 1, and the MH value of the rheometer data is also significantly improved compared with the prior art, which indicates that the physical and mechanical properties of the rubber material are improved, and T10, T30, T60 and T90 are close to the prior art, which indicates that the vulcanization rate of the rubber material is not changed and is not affected. In addition, the data of different batches of rheometer are similar, which shows that the uniformity and consistency of the sizing material are obviously improved. Where ML is the minimum torque, T10, T30, T60, T90 represent the vulcanization rate, the smaller the value, the faster the vulcanization rate, and MH is the maximum torque, representing the physical and mechanical properties of the compound.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modification, change and equivalent changes of the above embodiments according to the principles of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (1)
1. A method for controlling the mixing process of an internal mixer is characterized by adopting time and energy control and comprising the following steps:
(1) a first section of masterbatch: raw rubber, small materials and 2/3 carbon black enter an internal mixer, a feeding door is closed, then a top bolt is pressed, the holding time of the top bolt is 15-20 seconds, the energy reaches 4-8 joules, the top bolt is lifted to be in place, the rest 1/3 carbon black is added, the top bolt is pressed, the holding time is 15-20 seconds, the energy reaches 8-12 joules, the top bolt is cleaned, the holding time is 3-5 seconds, then the top bolt is pressed for 10-15 seconds, the energy reaches 12-15 joules, the top bolt is lifted to be in place, a discharging door is opened, rubber is discharged, and a discharging door is closed;
(2) second-stage masterbatch: after a section of masterbatch or a section of masterbatch, small materials and carbon black enter an internal mixer, closing a feeding door, then pressing a top bolt, keeping the time for pressing the top bolt for 10-20 seconds, and the energy for 3-6 joules, lifting the top bolt to be in place, pressing the top bolt, keeping the time for 15-25 seconds, and the energy for 8-12 joules, lifting the top bolt to be in place, opening a discharging door to discharge the rubber, and closing the discharging door;
(3) final mixing rubber: and (3) closing the feeding door after the two-section masterbatch and the small finished material enter the internal mixer, then pressing the top bolt, keeping the time for pressing the top bolt for 15-25 seconds, enabling the energy to reach 2-4 joules, lifting the top bolt to be in place, pressing the top bolt, keeping the time for 15-25 seconds, enabling the energy to reach 4-6 joules, lifting the top bolt to be in place, opening the discharging door to discharge the masterbatch, and closing the discharging door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010294914.9A CN111361042A (en) | 2020-04-15 | 2020-04-15 | Control method for mixing process of internal mixer |
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| CN202010294914.9A CN111361042A (en) | 2020-04-15 | 2020-04-15 | Control method for mixing process of internal mixer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114750324A (en) * | 2022-03-25 | 2022-07-15 | 山东玲珑轮胎股份有限公司 | Control method of internal mixer and internal mixer |
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