A method for controlling the speed of a glue

Abstract

The application relates to a glue feeding speed control method, belonging to the technical field of tire manufacturing, and comprising the following steps: collecting the accumulated glue amount at the current time, the accumulated glue amount being glue profile data between adjacent rollers; judging whether the glue feeding system has glue feeding abnormity based on the preset accumulated glue amount range and the accumulated glue amount at the current time; and outputting a control signal about whether to control the glue feeding system to continue executing the current operation parameter according to the judgment result, the current operation parameter including the screw rod rotating speed of an extruder, the glue strip width of a refining mill and the glue strip width of a glue feeding mill. The application automatically controls the glue feeding amount of the glue feeding system online, reduces personnel operation, improves the stability and uniformity of the glue feeding process, saves labor cost, improves production efficiency and does not need manual intervention.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of tire manufacturing, and particularly relates to a glue feeding speed control method. BACKGROUND

[0002] In the tire processing process, an extruder + an open mill are usually used to form a glue feeding system for a calender or a press-out head to feed glue, and the glue feeding system and the calender or the press-out head together form a calender or press-out linkage extrusion production line. At present, the existing glue feeding system is manually operated by manual operation, and the speed of the extruder, the glue strip width and other parameters are manually set by manual operation. When the product weight or shape deviates, manual adjustment of each parameter is required in the case of glue fluctuation. The problem brought by manual operation is that there is a lag in finding unqualified products, and manual adjustment and measurement are required multiple times. The mixing degree of the glue, the amount of rubber mixing and the amount of glue feeding cannot be effectively guaranteed. SUMMARY

[0003] In view of various deficiencies of the prior art, in order to solve the above problems, a glue feeding speed control method is provided.

[0004] To achieve the above purpose, the present application provides the following technical scheme:

[0005] A glue feeding speed control method comprises:

[0006] The accumulated amount of glue at the current time is collected, the accumulated amount of glue is the glue profile data between adjacent rollers, whether the glue feeding system has a glue feeding abnormality is judged based on the preset accumulated amount of glue range and the accumulated amount of glue at the current time, and a control signal about whether to control the glue feeding system to continue to execute the current running parameter is output according to the judgment result, the current running parameter including the screw speed of the extruder, the glue strip width of the fine refining open mill and the glue strip width of the glue feeding open mill.

[0007] The technical scheme is further provided that whether the glue feeding system has a glue feeding abnormality is judged based on the preset accumulated amount of glue range and the accumulated amount of glue at the current time, specifically:

[0008] Whether the accumulated amount of glue at the current time exceeds the preset accumulated amount of glue range is judged, and a control signal about whether to control the glue feeding system to continue to execute the current running parameter is output according to the judgment result.

[0009] The technical scheme is further provided that the control signal about whether to control the glue feeding system to continue to execute the current running parameter is output according to the judgment result, specifically:

[0010] If the accumulated amount of glue at the current time is within the preset accumulated amount of glue range, it is judged that the glue feeding system does not have a glue feeding abnormality, and a control signal for controlling the glue feeding system to continue to execute the current running parameter is output.

[0011] The technical scheme is further provided with the following steps:

[0012] If the accumulated rubber amount at the current time exceeds the preset accumulated rubber amount range, it is judged that the rubber supply system has a rubber supply abnormality, and a control signal for controlling the rubber supply system to adjust the operation parameter is output.

[0013] The technical scheme is further provided with the following steps:

[0014] The rubber supply system adjusts the operation parameter, and the accumulated rubber amount at the next time is collected again after an interval reaction time. If the accumulated rubber amount at the next time is within the preset accumulated rubber amount range, a control signal for controlling the rubber supply system to continue to execute the operation parameter at the next time is output. If the accumulated rubber amount at the next time exceeds the preset accumulated rubber amount range, a control signal for controlling the rubber supply system to continue to adjust the operation parameter is output, until the accumulated rubber amount is within the preset accumulated rubber amount range. The reaction time is the time for the rubber to be transferred from the upper-level device to the lower-level device.

[0015] The technical scheme is further provided with the following steps:

[0016] If the accumulated rubber amount is collected from the fine refining mill, a control signal for controlling the extruder to adjust the screw rotation speed thereof is output. The screw rotation speed variation of the extruder = preset accumulated rubber amount range difference value of the fine refining mill / k / delivery rubber amount. The delivery rubber amount is the rubber discharge weight of the extruder per unit time. The accumulated rubber amount range difference value is the difference between the maximum value and the minimum value of the accumulated rubber amount range. K is a correction coefficient set according to actual production.

[0017] The technical scheme is further provided with the following steps:

[0018] If the accumulated rubber amount is collected from the rubber supply mill, a control signal for controlling the fine refining mill to adjust the rubber strip width thereof is output. The rubber strip width variation of the fine refining mill = preset accumulated rubber amount range difference value of the rubber supply mill / k / unit width rubber supply amount. The unit width rubber supply amount is the rubber supply weight per unit width of the fine refining mill. The accumulated rubber amount range difference value is the difference between the maximum value and the minimum value of the accumulated rubber amount range. K is a correction coefficient set according to actual production.

[0019] The technical scheme is further provided with the following steps:

[0020] If the accumulation amount of rubber is collected in the calender main machine, the output control rubber supply mill adjusts the control signal of the rubber strip width, the rubber strip width variation of the rubber supply mill = preset accumulation amount range difference of the calender main machine / k / unit width rubber supply amount, the unit width rubber supply amount is the rubber supply weight per unit width of the rubber supply mill, the accumulation amount range difference is the difference between the maximum value and the minimum value of the accumulation amount range, and k is a correction coefficient set according to actual production.

[0021] The technical scheme is further provided that the collection method of the accumulation amount of rubber is:

[0022] The rubber material image between adjacent rollers is collected by a scanning device, the image contour data is extracted, and the accumulation amount of rubber is calculated.

[0023] The technical scheme is further provided that the adjustment method of the rubber strip width is:

[0024] The cutting vertical knives are arranged at the discharge ports of the refining mill and the rubber supply mill, and the cutting vertical knives are spaced apart by two, one cutting vertical knife is rotatably connected with the lead screw, and the other cutting vertical knife is drivingly connected with the lead screw, the lead screw is rotated to change the distance between the two cutting vertical knives, so as to adjust the rubber strip width.

[0025] The beneficial effects of the present application are:

[0026] 1. The rubber supply amount of the online automatic control rubber supply system is controlled, the personnel operation is reduced, and the stability and uniformity of the rubber supply process are improved.

[0027] 2. The closed-loop control between the rubber supply amount of the extruder and the accumulation amount of rubber of the mill is realized, and the closed-loop control between the rubber supply amount of the mill and the accumulation amount of rubber of the calender main machine is realized.

[0028] 3. The accumulation amount of rubber is collected online, the rubber material fluctuation can be found in time and corresponding adjustment can be made, so that the stability of the quality of rubber products is improved.

[0029] 4. No manual intervention is needed, labor cost is saved, and production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a schematic diagram of the rubber supply system in the present application;

[0031] Figure 2 It is a schematic diagram of the cutting vertical knife in the present application;

[0032] Figure 3 It is a schematic diagram of the calender main machine in the present application;

[0033] Figure 4 It is a flowchart of the rubber supply speed control method in the present application.

[0034] In the attached diagram: 1-Extruder, 2-Refining open mill, 3-Glue supply open mill, 4-Scanning equipment, 5-Glue strip width detector, 6-Glue accumulation, 7-Glue strip width, 8-Cutting blade, 9-Lead screw, 10-Calendar roll No. 1, 11-Calendar roll No. 2, 12-Calendar roll No. 3, 13-Calendar roll No. 4. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments in this application, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the scope of protection of this application. Furthermore, directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings; therefore, the directional terms used are for illustrative purposes and not for limiting the invention.

[0036] like Figure 1 The rubber supply system includes an extruder 1, a refining mill 2, and a rubber supply mill 3. Both the refining mill 2 and the rubber supply mill 3 include two relatively rotating rollers and a baffle plate located between the two rollers. The baffle plate forms a feed channel to ensure that the rubber compound is fed between the two rollers. Simultaneously, as... Figure 2 As shown, both the refining mill 2 and the rubber supply mill 3 are equipped with cutting blades 8 at their discharge ports. Two cutting blades 8 are arranged opposite each other to cut rubber strips of a specific width. Figure 3 The adhesive strips output by the adhesive supply system enter the calendering machine, which adopts an S-type four-roll structure, namely calendering roll 10, calendering roll 11, calendering roll 12, and calendering roll 13.

[0037] like Figure 4 As shown, a method for controlling adhesive supply speed includes:

[0038] S100. Collect the current amount of rubber accumulation 6, where the amount of rubber accumulation 6 is the profile data of the rubber material between adjacent rollers;

[0039] S300: Based on the preset glue accumulation range and the current glue accumulation 6, determine whether there is a glue supply abnormality in the glue supply system;

[0040] S500: Based on the judgment result, output a control signal regarding whether to control the glue supply system to continue executing the current operating parameters, wherein the current operating parameters include the screw speed of the extruder 1, the glue strip width of the refining open mill 2, and the glue strip width of the glue supply open mill 3.

[0041] It is worth mentioning that the online collection of the amount of accumulated glue 6 can timely find the fluctuation of the rubber material and control the glue supply system to make corresponding adjustment, thereby improving the stability of the quality of the rubber product.

[0042] The technical solution is further provided that the amount of accumulated glue 6 at the current time is based on the preset range of the amount of accumulated glue to determine whether the glue supply system has a glue supply abnormality, specifically:

[0043] It is determined whether the amount of accumulated glue 6 at the current time exceeds the preset range of the amount of accumulated glue, and a control signal about whether to control the glue supply system to continue to execute the current running parameter is output according to the determination result.

[0044] Specifically, the maximum value and the minimum value of the preset range of the amount of accumulated glue form the range of the amount of accumulated glue, and the amount of accumulated glue is required not to exceed the height of the rubber blocking plate during actual production. The minimum value of the range of the amount of accumulated glue is set according to the fact that the rubber material can only cover one of the adjacent rollers, and the maximum value of the range of the amount of accumulated glue is set according to the fact that the rubber material can cover all the adjacent rollers. H represents the maximum amount of glue of the refining mill 2, the glue supply mill 3 or the calender host (a device inherent parameter), and the unit is KG; D represents the roller diameter, and the unit is mm; L represents the roller length, and the unit is mm; b represents the roller gap, and the unit is mm; and p represents the rubber material density, and the unit is KG / m 3 .

[0045] The technical solution is further provided that the control signal about whether to control the glue supply system to continue to execute the current running parameter is output according to the determination result, specifically:

[0046] If the amount of accumulated glue 6 at the current time is within the preset range of the amount of accumulated glue, it is determined that the glue supply system does not have a glue supply abnormality, and a control signal for controlling the glue supply system to continue to execute the current running parameter is output, and the glue supply system receives the control signal and continues to execute the current running parameter.

[0047] The technical solution is further provided that the control signal about whether to control the glue supply system to continue to execute the current running parameter is output according to the determination result, specifically:

[0048] If the amount of accumulated glue 6 at the current time exceeds the preset range of the amount of accumulated glue, it is determined that the glue supply system has a glue supply abnormality, and a control signal for controlling the glue supply system to adjust the running parameter is output, and the glue supply system receives the control signal and adjusts the running parameter.

[0049] The technical solution is further provided that after the control signal for controlling the glue supply system to adjust the running parameter is output, the following steps are further included:

[0050] The glue supply system adjusts the operation parameter, and the accumulated glue amount 6 at the next time is collected again. If the accumulated glue amount 6 at the next time is within the preset accumulated glue amount range, a control signal for controlling the glue supply system to continue to execute the operation parameter at the next time is output. If the accumulated glue amount 6 at the next time is out of the preset accumulated glue amount range, a control signal for controlling the glue supply system to continue to adjust the operation parameter is output until the accumulated glue amount 6 is within the preset accumulated glue amount range. The reaction time is the time used for the glue to be transferred from the upper equipment to the lower equipment.

[0051] The technical scheme is further provided that the control signal for controlling the glue supply system to adjust the operation parameter is specifically:

[0052] If the accumulated glue amount 6 is collected in the fine mixer 2, a control signal for controlling the extruder 1 to adjust the screw rotation speed thereof is output. The screw rotation speed variation amount of the extruder 1 is equal to the preset accumulated glue amount range difference value of the fine mixer 2 / k / delivery amount. The delivery amount is the glue weight delivered by the extruder 1 per unit time. The accumulated glue amount range difference value is the difference between the maximum value and the minimum value of the accumulated glue amount range. The k is a correction coefficient, which can be given according to the actual production. In the embodiment, k = 16.

[0053] It is worth noting that if the accumulated glue amount 6 of the fine mixer 2 is greater than the maximum value of the accumulated glue amount range, a control signal for controlling the extruder 1 to reduce the screw rotation speed thereof is output. The extruder 1 receives and executes the control signal, specifically, the screw rotation speed variation amount is reduced on the basis of the current screw rotation speed, so as to reduce the glue supply amount per unit time. If the accumulated glue amount 6 of the fine mixer 2 is less than the minimum value of the accumulated glue amount range, a control signal for controlling the extruder to increase the screw rotation speed thereof is output. The extruder 1 receives and executes the control signal, specifically, the screw rotation speed variation amount is increased on the basis of the current screw rotation speed, so as to increase the glue supply amount per unit time.

[0054] The technical scheme is further provided that the control signal for controlling the glue supply system to adjust the operation parameter is specifically:

[0055] If the accumulated glue amount 6 is collected in the glue supply mixer 3, a control signal for controlling the fine mixer 2 to adjust the glue strip width 7 thereof is output. The glue strip width variation amount of the fine mixer 2 is equal to the preset accumulated glue amount range difference value of the glue supply mixer 3 / k / unit width glue supply amount. The unit width glue supply amount is the glue weight supplied by the fine mixer 2 per unit width. The accumulated glue amount range difference value is the difference between the maximum value and the minimum value of the accumulated glue amount range. The k is a correction coefficient, which can be given according to the actual production. In the embodiment, k = 16.

[0056] It is worth mentioning that if the accumulated rubber amount 6 of the rubber feeding mill 3 is greater than the maximum value of the accumulated rubber amount range, the output control signal for reducing the rubber strip width 7 of the fine rolling mill 2 is output, and the fine rolling mill 2 receives and executes the control signal, specifically, the rubber strip width change amount is reduced on the basis of the current rubber strip width to reduce the rubber feeding amount per unit width; if the accumulated rubber amount 6 of the rubber feeding mill 3 is less than the minimum value of the accumulated rubber amount range, the output control signal for increasing the rubber strip width 7 of the fine rolling mill 2 is output, and the fine rolling mill 2 receives and executes the control signal, specifically, the rubber strip width change amount is increased on the basis of the current rubber strip width to increase the rubber feeding amount per unit width.

[0057] The technical scheme is further provided that the output control signal for adjusting the operation parameters of the rubber feeding system is output, specifically:

[0058] If the accumulated rubber amount 6 is collected from the calender host machine, the output control signal for adjusting the rubber strip width 7 of the rubber feeding mill 3 is output, the rubber strip width change amount of the rubber feeding mill 3 = preset accumulated rubber amount range difference value / k / unit width rubber feeding amount, the unit width rubber feeding amount is the rubber feeding weight per unit width of the rubber feeding mill 3, the accumulated rubber amount range difference value is the difference between the maximum value and the minimum value of the accumulated rubber amount range, and k is a correction coefficient, which can be given according to actual production, and in the embodiment, k = 16.

[0059] It is worth mentioning that if the accumulated rubber amount 6 of the rubber feeding mill 3 is greater than the maximum value of the accumulated rubber amount range, the output control signal for reducing the rubber strip width 7 of the fine rolling mill 2 is output, and the fine rolling mill 2 receives and executes the control signal, specifically, the rubber strip width change amount is reduced on the basis of the current rubber strip width to reduce the rubber feeding amount per unit width; if the accumulated rubber amount 6 of the rubber feeding mill 3 is less than the minimum value of the accumulated rubber amount range, the output control signal for increasing the rubber strip width 7 of the fine rolling mill 2 is output, and the fine rolling mill 2 receives and executes the control signal, specifically, the rubber strip width change amount is increased on the basis of the current rubber strip width to increase the rubber feeding amount per unit width.

[0060] Meanwhile, the output control signal for adjusting the rubber strip feeding speed of the rubber feeding mill 3 is output, wherein the rubber strip feeding speed change amount = original rubber strip feeding speed*(0-50%) under the condition of variable speed and variable frequency of the rubber feeding arm, and the value is specifically given according to the on-site debugging.

[0061] The technical scheme is further provided that the collection method of the accumulated rubber amount 6 is:

[0062] The rubber image between adjacent rollers is collected by the scanning device 4, the image contour data is extracted, and the accumulated rubber amount 6 is calculated. Preferably, the scanning device 4 adopts a visual imaging lens.

[0063] This technical solution is further configured such that the width 7 of the adhesive strip is detected online by the adhesive strip width detector 5, and the method for adjusting the width 7 of the adhesive strip is as follows:

[0064] Two cutting blades 8 are spaced apart. One cutting blade is rotatably connected to the lead screw 9, and the other cutting blade is drivenly connected to the lead screw 9. The lead screw 9 is rotated according to the change in the width of the rubber strip to change the distance between the two cutting blades 8, thereby adjusting the width of the rubber strip.

[0065] In addition, prior to step S100, the basic operating parameters of the glue supply system are set, including the screw speed (RPM) of the extruder 1, the rubber strip width (W) of the refining mill 2, and the glue supply mill 3. Specifically, when calendering begins glue supply production, the glue supply system operates at a low speed, and the RPM and W are calculated based on the fabric production speed (V).

[0066] T*RPM=P*V*K, according to the law of conservation of mass, therefore RPM=PVK / T; W*B*F*ρ / 1000=P*V*K, according to the law of conservation of mass, therefore W=1000*PVK / BFρ, where, rubber strip speed F represents the speed of the conveyor belt supplying rubber on refining mill 2 or rubber supply mill 3 (unit: m / s), production speed V represents the speed of calendering cord wiring (unit: m / s), rubber strip thickness B represents the thickness of the rubber strip supplied by refining mill 2 or rubber supply mill 3 (unit: mm), and compound density ρ represents the density of the plasticized compound (unit: KG / m³). 3 The weight per square meter (P) of the curtain fabric represents the weight of adhesive contained in one square meter of curtain fabric (unit: KG / m). 2 The fabric width K represents the width of the calendered fabric (in meters), and the extruder discharge rate T represents the weight of extruded rubber per unit time and rotational speed (in kg / RPM / s).

[0067] When the glue supply system is in a stable speed-up state, RPM and W are increased accordingly. When the calendering cord wiring speed is increased to the maximum speed, steps S100 to S500 are executed to achieve closed-loop control.

[0068] Example 2:

[0069] The parts that are the same as in Example 1 will not be repeated here. The differences are as follows:

[0070] like Figure 3 As shown, scanning devices 4 are installed between the first calender roll 10 and the second calender roll 11, and between the third calender roll 12 and the fourth calender roll 13.

[0071] If one of the two accumulated rubber amounts collected by the two scanning devices 4 is greater than the maximum value of the accumulated rubber amount range, a control signal is output to control the rubber supply mill 3 to reduce its rubber strip width 7. Similarly, if one of the accumulated rubber amounts is less than the minimum value of the accumulated rubber amount range, a control signal is output to control the rubber supply mill 3 to increase its rubber strip width 7.

[0072] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A method for controlling adhesive supply speed, characterized in that, include: Collect the amount of rubber accumulated at the current moment, where the amount of rubber accumulated is the profile data of the rubber material between adjacent rollers; Based on the preset range of accumulated glue amount and the current accumulated glue amount, it is determined whether the current accumulated glue amount exceeds the preset range of accumulated glue amount, and then it is determined whether there is an abnormality in the glue supply system. According to the judgment result, a control signal is output regarding whether to control the glue supply system to continue to execute the current operating parameters. The current operating parameters include the screw speed of the extruder, the glue strip width of the refining mill, and the glue strip width of the glue supply mill. Specifically, if the amount of glue accumulated at the current moment is within the preset glue accumulation range, it is determined that there is no glue supply abnormality in the glue supply system, and a control signal is output to control the glue supply system to continue to execute the current operating parameters; if the amount of glue accumulated at the current moment exceeds the preset glue accumulation range, it is determined that there is a glue supply abnormality in the glue supply system, and a control signal is output to control the glue supply system to adjust the operating parameters. Specifically, if the accumulated rubber is collected from the refining mill, a control signal is output to control the extruder to adjust its screw speed. The change in the extruder's screw speed is equal to the preset difference in the accumulated rubber range of the refining mill / k / rubber discharge rate, where the rubber discharge rate is the weight of rubber discharged by the extruder per unit time per millisecond. If the accumulated rubber is collected from the rubber supply mill, a control signal is output to control the refining mill to adjust its rubber strip width. The change in the rubber strip width of the refining mill is equal to the preset difference in the accumulated rubber range of the rubber supply mill / k / rubber supply per unit width. The amount of rubber supplied per unit width is the weight of rubber supplied per unit width of the refining mill; if the rubber accumulation is collected from the calendering main unit, a control signal is output to control the rubber supply mill to adjust its rubber strip width. The change in rubber strip width of the rubber supply mill = the preset rubber accumulation range difference of the calendering main unit / k / rubber supply per unit width, where the rubber supply per unit width is the weight of rubber supplied per unit width of the rubber supply mill; wherein, the rubber accumulation range difference is the difference between the maximum and minimum values ​​of the rubber accumulation range, and k is a correction coefficient set according to actual production.

2. The glue supply speed control method according to claim 1, characterized in that, After the control signal for adjusting the operating parameters of the glue supply system is output, the system also includes: The glue supply system adjusts its operating parameters and collects the glue accumulation amount at the next time interval after the reaction time. If the glue accumulation amount at the next time is within the preset glue accumulation amount range, a control signal is output to control the glue supply system to continue executing the operating parameters for the next time. If the glue accumulation amount at the next time exceeds the preset glue accumulation amount range, a control signal is output to control the glue supply system to continue adjusting the operating parameters until the glue accumulation amount is within the preset glue accumulation amount range. The reaction time is the time taken for the glue material to be transferred from the upper-level equipment to the lower-level equipment.

3. The glue supply speed control method according to claim 1, characterized in that, The method for collecting the amount of accumulated glue is as follows: Images of the rubber compound between adjacent rollers are acquired using a scanning device, image contour data is extracted, and the amount of rubber accumulated is calculated.

4. The glue supply speed control method according to claim 1, characterized in that, The method for adjusting the width of the adhesive strip is as follows: Both the fine refining mill and the rubber supply mill have cutting blades at their discharge ports. There are two cutting blades spaced apart. One cutting blade is rotatably connected to a lead screw, and the other cutting blade is driven by the lead screw. Rotating the lead screw changes the distance between the two cutting blades to adjust the width of the rubber strip.

Images