On-line non-stop switching emptying process for extruded rubber

Abstract

The invention belongs to the technical field of tire production, and particularly relates to an online non-stop switching emptying process for extruded rubber. According to the invention, the unit glue discharging amount of the extruder is calculated, the total glue discharging revolution required for completing glue discharging and emptying actions is calculated, the time is calculated by combining the real-time rotation speeds of crown glue of various specifications in the rotation speed formula table of the manufacturing execution system during production, and time conversion countdown is carried out by utilizing a PLC calculation function, so that the non-stop switching of glue types is realized; compared with the prior art, cost loss caused by glue emptying when equipment is shut down is successfully avoided, a glue material switching quality monitoring method is perfected, the time utilization rate of the equipment is increased to 95% or above after the technology is applied, and the problem of time cost loss caused by glue emptying when the equipment is shut down during glue material switching in an extrusion project can be solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of tire production, and in particular relates to a process for extruding rubber and switching and emptying the same without stopping the machine. Background Art

[0002] The tread rubber of the tire has high wear resistance, fatigue resistance, good aging resistance, high tensile strength, elasticity and toughness, as well as low heat generation during driving. Due to different usage scenarios or regions, the rubber formula design is also very different. Therefore, the extrusion process will produce corresponding rubbers according to the different rubbers when producing the crown components. In order to ensure the purity of the rubber and meet the performance requirements, the extrusion process needs to empty the extruder when switching production between different rubber types to prevent the rubber from being mixed due to unemptied rubbers. In order to avoid reducing the performance of the crown rubber, each time the rubber type is switched, it takes 10-20 minutes to empty the rubber extruder due to different equipment models or production processes. In addition, each tire manufacturer has its own different customers or markets, and the crown rubber formula design will also be different. According to the current tire companies with a production capacity of more than 30,000 per day, there are more than 6 types of crown rubber compounds. According to the three-shift production system per day, the cumulative rubber emptying and switching time is MIX. 180 minutes, which greatly reduces production efficiency and the equipment utilization rate is less than 83%. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a process for online switching and emptying of extruded rubber types without stopping the machine. In order to solve the time and cost loss caused by equipment shutdown to empty the rubber material when switching rubber types in the extrusion process, the present invention calculates the unit rubber discharge volume of the extruder, standardizes the rubber material switching, and uses the principle of unidirectional pushing of the rubber material by the extruder to calculate the process parameters of the rubber material from the feeding end to the mold end. It also assists in the use of MES and PLC program empowerment to achieve non-stop switching of rubber types, successfully avoiding the cost loss caused by equipment shutdown to empty the rubber type, and improving the rubber material switching quality monitoring method. After the application of this process, the time utilization rate of the equipment is increased to more than 95%.

[0004] To achieve the above technical objectives, the technical solution adopted in the embodiment of the present invention is: The embodiment of the present invention provides a process for switching and draining the rubber type online without stopping the machine, including the following steps: (1) Measure the gap between the thread wall and the inner sleeve of the extruder used for the crown glue. In the empty state, measure the gap between the thread and the inner sleeve in four directions: up, down, left and right, to ensure that the gap meets the requirements; (2) After the extruder die is locked, install the die into the die box and lock it, start adding glue and draining glue, the time is 5-10 minutes, wait for the glue to drain glue to be stable and no bubble sound occurs, then start the glue discharge amount measurement test; (3) After the discharge volume data is statistically completed, the rubber material is cut off from the feed port and the discharge port, and the machine is stopped to empty the rubber material in the barrel, runner, and pre-die and weigh and record; (4) Calculate the glue discharge amount per revolution based on the above data, and calculate the total number of revolutions required to complete the glue discharge and emptying action; (5) Combined with the speed formula table of the manufacturing execution system, the real-time speed calculation time of the crown glue of each specification during production is calculated, and the PLC calculation function is used to convert the time into a countdown. When the countdown ends, the PLC sounds an alarm and the equipment stops operating. At this time, the glue type switching has been completed; (6) According to the production plan of the next specification, start the die switching and smoothly carry out the production operation of the new specification and new rubber type.

[0005] Furthermore, in step (1), when the measured mean value of the gap is ≤0.5 mm, the mixing of the rubber caused by the rubber backflow can be ignored, which meets the requirements; When the measured average value of the clearance is greater than 0.5mm, it means that the wear between the screw and the bushing exceeds the process control range and the maintenance period is required.

[0006] Furthermore, during the rubber material discharge amount measurement test in step (2), the extruder is tested for the rubber material discharge amount at the minimum, median, and maximum speeds as required by the equipment protocol, and multiple sets of data are continuously sampled and tested within a fixed time period at the three speeds, and are weighed and recorded respectively; Sampling meets the following conditions: the weight of a single sample within a fixed time period is 3-6 kg.

[0007] Furthermore, when sampling in step (2), the following steps are included: a. After the extruder has stabilized at 5 r / min for one minute, start timing in 30-second intervals, collect the amount of glue discharged during this period, and weigh it on an electronic scale, collecting six sets of data continuously; b. After the extruder is stable at 15 r / min for 30 seconds, start timing in 10-second intervals, collect the amount of glue discharged during this period, and weigh it on an electronic scale, collecting 6 sets of data continuously; c. After the extruder has stabilized at 25 r / min for 30 seconds, start timing in 5-second intervals, collect the glue output within this period, and weigh it on an electronic scale, collecting 6 sets of data continuously.

[0008] Furthermore, in step (4), the amount of glue G per rotation is 转 The calculation formula is as follows: G 转 = G 均 ÷(V×t÷60), Among them, G 转 -Amount of rubber per revolution, kg / r; G 均 -Average weight of the discharged glue at the test speed, kg; V-extruder speed, r / min; t-timing time, s.

[0009] Furthermore, in step (4), the calculation formula for the total number of revolutions R of debinding is as follows: R=(G1+G2+G3)÷G0, Where, R is the total number of revolutions for debinding, r; G1 is the weight of the barrel rubber, kg; G2 is the weight of the runner rubber, kg; G3 is the weight of the die rubber, kg; G0 is the weight per revolution, kg / r.

[0010] Furthermore, in step (5), the following formula is used to calculate the time: T=R / v, Where T is time, s; R is total number of revolutions for debinding, r; v is real-time speed, r / min.

[0011] The technical solution provided by the embodiment of the present invention has the following beneficial effects: (1) The application of the process of online rubber type switching and emptying without stopping the machine has greatly changed the quality problems such as tread block falling, tread groove bottom cracking, and tire wear resistance caused by the mixing of crown rubber and rubber types that have always been the focus of quality departments or inadequate on-site supervision; and has greatly improved production efficiency in actual production applications, with the equipment's time utilization rate increased by more than 12%.

[0012] (2) The present invention is a process for switching rubber types and emptying the rubber without stopping the machine. It is simple to use and operate, and is not limited by specific time or specific speed. It performs autonomous formula calculations based on the real-time formula speed, does not affect the changes in online re-production specifications and dimensions, and automatically completes the rubber type switching process with an alarm prompt (shutdown) after emptying. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is an operational flow chart of the on-line non-stop emptying process for extruding rubber types in an embodiment of the present invention.

[0014] Figure 2 This is a workflow diagram of the online non-stop emptying process for extruding rubber types in an embodiment of the present invention. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0016] Example 1 When switching between the crown RW rubber and RX rubber, the Telester four-composite extrusion equipment is used to implement the non-stop emptying process for switching the extrusion rubber type, such as Figure 1 and 2 As shown, the following steps are included: (1) The gap between the thread wall and the inner sleeve of the extruder used for the crown glue was measured. In the empty state, the gap between the thread and the inner sleeve was measured in four directions: up, down, left and right. The average value was 0.2625 mm, which met the requirements. See Table 1 for details.

[0017] Table 1 Measurement results of the gap between the thread wall and the inner sleeve .

[0018] Note: The measurement method in Table 3 is: facing the screw, use a feeler gauge to measure in four directions in a cross pattern: up, down, left, and right.

[0019] (2) After the extruder die is locked, install the die into the die box and lock it, start adding RW rubber and discharging the rubber for 5-10 minutes, wait for the rubber to be discharged stably and no bubble sound occurs, and then start the rubber discharge measurement test; (3) After the extruder is stable at the minimum speed of 5 r / min for 1 min, the timing is started with a time period of 30 s. The amount of glue discharged during this time period is collected and weighed on an electronic scale. 6 sets of data are collected continuously, as shown in Table 2. (4) After the extruder is stable at a median speed of 15 r / min for 30 s, the time is counted in 10 s intervals. The amount of glue discharged during this period is collected and weighed on an electronic scale. Six sets of data are collected continuously, as shown in Table 2. (5) After the extruder is stable at the maximum speed of 25 r / min for 30 seconds, the time is counted in 5-second intervals. The amount of glue discharged during this period is collected and weighed on an electronic scale. Six sets of data are collected continuously, as shown in Table 2. Table 2 Calculation results of RW rubber discharge volume .

[0020] The amount of glue G per rotation in Table 2 转 The calculation formula is as follows: G 转 = G 均 ÷(V×t÷60), G 转 - the amount of rubber discharged per revolution, kg / r; G 均 - the average weight of rubber discharged at the test speed, kg; V - the speed of the extruder, r / min; t - the time, s.

[0021] According to the data in Table 2, when the speed is 5 r / min, the amount of rubber discharged per revolution G 转 = G 均 ÷ (V x t ÷ 60) = 4.07 ÷ (5 x 30 ÷ 60) = 1.627 kg / r; When the speed is 15 r / min, the amount of rubber discharged per revolution G 转 = G 均 ÷ (V x t ÷ 60) = 3.99 ÷ (15 x 10 ÷ 60) = 1.595 kg / r; When the speed is 25 r / min, the amount of rubber discharged per revolution G 转 = G 均 ÷ (V x t ÷ 60) = 3.32 ÷ (25 x 5 ÷ 60) = 1.594 kg / r.

[0022] (6) After the above data collection is completed, the rubber at the feeding port is cut off, and the tail end rubber is moved to the bottom of the feeding port, and the machine is stopped to clean all the rubber outside the pre-die; (7) At this time, the machine is restarted and the head is opened, and all the rubber in the pre-die, the flow channel and the cylinder is discharged, weighed and recorded, as shown in Table 3; (8) According to the data in Table 1, the amount of rubber discharged per revolution G 转 is calculated, and then the total amount of rubber in the entire cylinder, flow channel and pre-die is summed up to calculate the total number of revolutions required to complete the rubber discharge and emptying action, as shown in Table 3; Table 3 Total Rubber Amount Data Weighing Table of Cylinder and Flow Channel .

[0023] The calculation formula of the total number of rubber discharge R is as follows: R = (G1 + G2 + G3) ÷ G0, wherein R - the total number of rubber discharge, r; G1 - the weight of rubber in the cylinder, kg; G2 - the weight of rubber in the flow channel, kg; G3 - the weight of rubber in the pre-die, kg; G0 - the amount of rubber per revolution, kg / r.

[0024] According to the data in Tables 2 and 3, the total number of rubber discharge R = (G1 + G2 + G3) ÷ G0 = (70.005 kg + 17 kg + 0.5 kg) ÷ 1.605 kg / r ≈ 55 r.

[0025] (9) Combined with the real-time rotation speed of the crown glue of each specification in the MES during production, according to the formula: total number of revolutions (r) ÷ real-time rotation speed (r / min) ÷ 60 = time (s), and use the PLC calculation function to convert the time countdown. When the countdown ends, the PLC will sound an alarm and the equipment will stop working. At this time, the glue type switching has been completed; (10) According to the production plan of the next specification, the die type switching is started and the production operation of RX rubber is carried out smoothly.

[0026] After the equipment stops due to an alarm, samples are taken at intervals of 1 m before and after the shutdown, with one crown rubber sample taken at 3 m, 2 m, 1 m, shutdown, -1 m, -2 m, and -3 m respectively (the shutdown period is taken as the zero point, the length of the rubber material already discharged before the shutdown is recorded as a positive number, and the length of the rubber material discharged when the machine is restarted is recorded as a negative number). Quick rheological data checks (Norma MFR 100 rotorless rheometer), specific gravity checks (MH-300A), and hardness checks (Shore durometer LX-A) are performed. Based on this data, the accuracy of the mixing position and the unmixed position at the junction of the two rubber materials is verified. The rheological, specific gravity, hardness, and related parameters of the crown RW rubber material are shown in Table 4, and the related parameters of the crown RX rubber material are shown in Table 5.

[0027] Table 4 Related parameters of RW rubber at different positions .

[0028] Table 5 Parameters of RX rubber at different positions .

[0029] Note: The data in Table 4 and Table 5 are explained as follows: ML unit: dN·m, represents the minimum torque, indicates the initial fluidity of the rubber compound, and reflects the viscosity characteristics of the unvulcanized rubber compound.

[0030] MH unit: dN·m stands for maximum torque, which indicates the highest torque reached by the rubber during the vulcanization process and reflects the maximum crosslinking density or rigidity of the vulcanized rubber; TC10, TC30, TC50, TC90, and TS1 are all expressed in seconds. TC10 is the initial vulcanization time, when the torque reaches ML+10%, signaling the beginning of the vulcanization reaction. TC30 / TC50 correspond to 30% and 50% vulcanization, respectively, and are used to assess the vulcanization progress. TC90, when the torque reaches ML+90%, represents the time required for the compound to complete 90% crosslinking and is a key parameter for determining optimal vulcanization conditions. TS1 represents the scorch time in a rubber compound, defined as the time from the start of the experiment to the point where the torque on the vulcanization curve rises by 0.1 N·m. This parameter is primarily used to assess the processing safety of the compound. Shorter values ​​indicate a greater susceptibility to scorch (i.e., premature vulcanization). By extending the TS1 value, accelerator dosage can be optimized or the vulcanization system can be adjusted to balance processing efficiency and safety.

[0031] Unit of specific gravity: g / cm 3 , the specific gravity value reflects the density or weight of the rubber compound; The unit of hardness: HA, reflects the rubber's ability to resist indentation. The higher the value, the harder it is, reflecting the performance requirements of different rubbers.

[0032] Tables 4 and 5 show significant differences in ML / MH and specific gravity values ​​for each 1m sample. The 1m sample data differs significantly from the data for normal RX or RW samples, indicating that the rubber material in question is a mixed material. Comparative analysis of the data at the ±3m sampling locations reveals that the +3m data agrees with the data for the normal RW sample, while the -3m data agrees with the data for the normal RX sample, indicating that the rubber material in question is consistent with the normal data.

[0033] Example 2 When switching between RA and XB rubber compounds in the crown, the Telester four-compound extruder is used to implement the non-stop emptying process for extrusion rubber type switching, including the following steps: The rubber material added in step (2) is the crown RA rubber material, and the rubber material added in step (10) is the crown XB rubber material. The remaining steps and related parameters are the same as those in Example 1.

[0034] The test results of the rubber discharge amount measurement test in steps (2)-(5) are shown in Table 6.

[0035] Table 6 Calculation results of RA rubber discharge .

[0036] The amount of glue G per rotation in Table 6 圈 The calculation formula is as follows: G 圈 = G 均 ÷(V×t÷60), Among them, G 圈 -The weight of the glue discharged after one screw rotation, kg / r; G 均 -Average weight of the discharged glue at the test speed, kg; V-extruder speed, r / min; t-timing time, s.

[0037] According to the data in Table 6, when the speed is 5 r / min, the amount of glue discharged per revolution is G. 圈 = G 均 ÷(V×t÷60)=4.15÷(5×30÷60)=1.660kg / r; When the speed is 15 r / min, the amount of glue per revolution is G 圈 = G 均 ÷(V×t÷60)=4.11÷(15×10÷60)=1.644kg / r; When the speed is 25 r / min, the amount of glue per revolution is G 圈 = G 均 ÷(V×t÷60)=3.42÷(25×5÷60)=1.594kg / r.

[0038] The total number of revolutions required to complete the debinding and emptying action in step (8) is shown in Table 7.

[0039] Table 7 Weighing table of total rubber quantity of barrel and runner .

[0040] The calculation formula for the total number of revolutions R for debinding is as follows: R=(G1+G2+G3)÷G0, Where, R is the total number of revolutions for debinding, r; G1 is the weight of the barrel rubber, kg; G2 is the weight of the runner rubber, kg; G3 is the weight of the die rubber, kg; G0 is the weight per revolution, kg / r.

[0041] According to the data in Table 6 and Table 7, the total debinding revolutions R = (G1 + G2 + G3) ÷ G0 = (71.815 kg + 17.47 kg + 0.6 kg) ÷ 1.648 kg / r ≈ 55 r.

[0042] After the equipment shuts down due to an alarm, samples are taken at 1m intervals before and after the shutdown, with one crown rubber sample taken at 3m, 2m, 1m, shutdown, -1m, -2m, and -3m respectively (the shutdown period is taken as the zero point, the length of the rubber material already discharged before the shutdown is recorded as a positive number, and the length of the rubber material discharged when the machine is restarted is recorded as a negative number). Quick rheological data checks (Norma MFR 100 rotorless rheometer), specific gravity checks (MH-300A), and hardness checks (Shore durometer LX-A) are performed. This data is used to determine the accuracy of the mixing position and unmixed position at the junction of the two rubber materials. The relevant parameters of the rubber rheology, specific gravity, hardness, and crown RA rubber material are shown in Table 8, and the relevant parameters of the crown XB rubber material are shown in Table 9.

[0043] Table 8 RA rubber parameters at different positions .

[0044] Table 9 Related parameters of XB rubber at different positions .

[0045] The data in Tables 8 and 9 show that the test data measured at each 1m sampling position show significant differences in ML / MH, specific gravity, and hardness values. The data at the ±1m sampling positions show significant differences compared to the data from normal samples (RA or XB), indicating that the rubber material in these locations is a mixed-stage material. Comparative analysis of the data at the ±3m sampling positions shows that the data at the +3m position matches the data from the normal RA sample, and the data at the -3m position matches the data from the normal XB sample, indicating that the data from these materials are consistent with the normal rubber material.

[0046] Example 3 When switching between crown rubber compound T557 and T309, the Telester four-compound extruder is used to implement the non-stop emptying process of extrusion rubber type switching, including the following steps: The rubber material added in step (2) is the crown T557 rubber material, and the rubber material added in step (10) is the crown T309 rubber material. The remaining steps and related parameters are the same as those in embodiment 1.

[0047] The test results of the rubber discharge amount measurement test in steps (2)-(5) are shown in Table 10.

[0048] Table 10 Calculation results of T557 rubber discharge volume .

[0049] The amount of glue G per rotation in Table 10 圈 The calculation formula is as follows: G 圈 = G 均 ÷(V×t÷60), Among them, G 圈 -The weight of the glue discharged after one screw rotation, kg / r; G 均 -Average weight of the discharged glue at the test speed, kg; V-extruder speed, r / min; t-timing time, s.

[0050] According to the data in Table 6, when the speed is 5 r / min, the amount of glue discharged per revolution is G. 圈 = G 均 ÷(V×t÷60)=4.20÷(5×30÷60)=1.680kg / r; When the speed is 15 r / min, the amount of glue per revolution is G 圈 = G 均 ÷(V×t÷60)=4.14÷(15×10÷60)=1.656kg / r; When the speed is 25 r / min, the amount of glue per revolution is G 圈 = G 均 ÷(V×t÷60)=3.38÷(25×5÷60)=1.622kg / r.

[0051] The total number of revolutions required to complete the debinding and emptying action in step (8) is shown in Table 11.

[0052] Table 11 Weighing table of total rubber quantity of barrel and runner .

[0053] The calculation formula for the total number of revolutions R for debinding is as follows: R=(G1+G2+G3)÷G0, Where, R is the total number of revolutions for debinding, r; G1 is the weight of the barrel rubber, kg; G2 is the weight of the runner rubber, kg; G3 is the weight of the die rubber, kg; G0 is the weight per revolution, kg / r.

[0054] According to the data in Table 10 and Table 11, the total debinding revolutions R = (G1+G2+G3) ÷ G0 = (72kg+17.82kg+0.66kg) ÷ 1.653kg / r ≈ 55r.

[0055] After the device is alarmed to stop, sampling is performed every 1m before and after starting, and one crown rubber sample is taken at 3m, 2m, 1m, stop, -1m, -2m, -3m respectively (taking the stop time as zero point, the rubber material already discharged before stop is recorded as positive number according to length, and the length of the rubber material discharged after starting again is recorded as negative number) to perform rapid detection rheological data inspection (Noma mfr 100 non-rotor rheometer), specific gravity inspection (MH-300A), hardness inspection (Shore hardness tester LX-A), so as to determine the accuracy verification of the mixing position and unmixed rubber position of the two rubber materials, and the rubber material rheology, specific gravity and hardness of the crown T557 rubber material and the crown T309 rubber material are shown in Tables 12 and 13.

[0056] Table 12 Related parameters of T557 rubber material at different positions .

[0057] Table 13 Related parameters of T309 rubber material at different positions .

[0058] As can be seen from the data in Tables 12 and 13, the detection data measured at each 1m sample position has obvious differences in ML / MH and specific gravity, hardness values. The ±1m sample position data has great differences compared with the normal sample data of the T557 rubber material or the T309 rubber material, so it is determined that the rubber material at this position is a mixed section rubber material, and the data at the ±3m sampling position is compared and analyzed, the +3m position data is consistent with the normal sample T557 rubber material data, and the -3m position data is consistent with the normal sample T309 rubber material data, so it is determined that the rubber material at this position is consistent with the normal rubber material data.

[0059] Experimental verification conclusion: Through the above three groups of different crown rubber formula rubber material non-stop emptying rubber type switching verification, and sampling data analysis of each section of rubber material, through the data difference among sulfur variation, specific gravity and hardness, it is determined that the data of the rubber material in the ±1m section position changes the most, which is the mixed section of the two rubber materials, the data of the ±2m section position is consistent with the normal data, which meets the use index, and the data of the ±3m section position is consistent with the normal sample data, so it is determined that the rubber type switching emptying process meets the emptying requirements, and the verification is successful.

[0060] Finally, it should be explained that the above specific embodiments are only used to illustrate the technical solutions of the present application and not to limit it. Although the present application has been described in detail with reference to examples, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A process for switching and emptying rubber types without stopping the machine, characterized in that: The following steps are involved: (1) Measure the gap between the thread wall and the inner sleeve of the extruder used for the crown glue. In the empty state, measure the gap between the thread and the inner sleeve in four directions: up, down, left and right, to ensure that the gap meets the requirements; (2) After the extruder die is locked, install the die into the die box and lock it, start adding glue and draining glue, the time is 5-10 minutes, wait for the glue to drain glue to be stable and no bubble sound occurs, then start the glue discharge amount measurement test; (3) After the discharge volume data is statistically completed, the rubber material is cut off from the feed port and the discharge port, and the machine is stopped to empty the rubber material in the barrel, runner, and pre-die and weigh and record; (4) Calculate the glue discharge amount per revolution based on the above data, and calculate the total number of revolutions required to complete the glue discharge and emptying action; (5) Combined with the speed formula table of the manufacturing execution system, the real-time speed calculation time of the crown glue of each specification during production is calculated, and the PLC calculation function is used to convert the time into a countdown. When the countdown ends, the PLC sounds an alarm and the equipment stops operating. At this time, the glue type switching has been completed; (6) According to the production plan of the next specification, start the die switching and smoothly carry out the production operation of the new specification and new rubber type.

2. The process for switching and emptying the rubber type online without stopping the machine according to claim 1 is characterized in that: In step (1), when the measured mean value of the gap is ≤0.5 mm, the mixing of the rubber caused by the rubber backflow can be ignored, which meets the requirements; When the measured average value of the clearance is greater than 0.5mm, it means that the wear between the screw and the bushing exceeds the process control range and the maintenance period is required.

3. The process for switching and emptying the rubber type online without stopping the machine according to claim 1 is characterized in that: During the rubber material discharge amount measurement test in step (2), the extruder is tested for the rubber material discharge amount at the minimum, median, and maximum speeds as required by the equipment protocol, and multiple sets of data are continuously sampled and tested within a fixed time period at the three speeds, and are weighed and recorded respectively; Sampling meets the following conditions: the weight of a single sample within a fixed time period is 3-6 kg.

4. The process for switching and emptying the rubber type online without stopping the machine according to claim 3 is characterized in that: When sampling in step (2), the following steps are included: a. After the extruder has stabilized at 5 r / min for one minute, start timing in 30-second intervals, collect the amount of glue discharged during this period, and weigh it on an electronic scale, collecting six sets of data continuously; b. After the extruder is stable at 15 r / min for 30 seconds, start timing in 10-second intervals, collect the amount of glue discharged during this period, and weigh it on an electronic scale, collecting 6 sets of data continuously; c. After the extruder has stabilized at 25 r / min for 30 seconds, start timing in 5-second intervals, collect the glue output within this period, and weigh it on an electronic scale, collecting 6 sets of data continuously.

5. The process for switching and emptying the rubber type online without stopping the machine according to claim 1 is characterized in that: In step (4), the amount of glue G per rotation 转 The calculation formula is as follows: G 转 = G 均 ÷(V×t÷60), Among them, G 转 -Amount of rubber per revolution, kg / r; G 均 -Average weight of the discharged glue at the test speed, kg; V-extruder speed, r / min; t-timing time, s.

6. The process for switching and emptying the rubber type online without stopping the machine according to claim 1 is characterized in that: In step (4), the calculation formula for the total number of debinding revolutions R is as follows: R=(G1+G2+G3)÷G0, Where, R is the total number of revolutions for debinding, r; G1 is the weight of the barrel rubber, kg; G2 is the weight of the runner rubber, kg; G3 is the weight of the die rubber, kg; G0 is the weight per revolution, kg / r.

7. The process for switching and emptying the rubber type online without stopping the machine according to claim 1 is characterized in that: In step (5), the following formula is used to calculate the time: T=R / v, Where T is time, s; R is total number of revolutions for debinding, r; v is real-time speed, r / min.

Images