Extruder control method, device and system and extruder

Abstract

The invention provides an extruder control method, device and system and an extruder. The control method comprises the steps that the production outer diameter of a target cable is detected in real time through an outer diameter collecting device; comparing the production outer diameter with a standard outer diameter range in real time; when the production outer diameter is smaller than the lower limit value of the standard outer diameter range, the rotating speed value of an extrusion screw of the extruder is increased; when the production outer diameter is larger than the upper limit value of the standard outer diameter range, the rotating speed value of the extrusion screw is reduced; when the production outer diameter is larger than or equal to the lower limit value of the standard outer diameter range and smaller than or equal to the lower limit value of the standard outer diameter range, the rotating speed value of the extrusion screw is kept unchanged; and controlling an extrusion screw to extrude the material according to the rotating speed value. The production outer diameter of the target cable is compared with the standard outer diameter range in real time, and then the rotating speed value of the screw is dynamically adjusted according to the comparison result, so that the material extrusion speed of the extruder is changed, and the production outer diameter of the target cable meets the standard outer diameter range.

Description

Technical Field

[0001] The present application belongs to the field of cable processing technology, and in particular to the field of extruders used for processing cable insulation layers and / or sheath layers. Specifically, the present application relates to an extruder control method, device, system and extruder. Background Art

[0002] As an important transmission device for electric energy or signals, cables are mainly composed of a conductor for transmitting electric energy or signals and an outer insulation layer and a sheath layer. Among them, the insulation layer has good insulation properties, and the sheath layer protects the inside of the cable from mechanical damage. Therefore, the production of the insulation layer and the sheath layer plays a vital role in the factory performance of the cable. The extruder is a production equipment for producing insulation layers and sheath layers for the conductor or inner core during the cable manufacturing process, mainly including: a wire-laying device, a straightening device, a preheating device, and an extruder. Among them, the extruder is used to fully plasticize and evenly mix the plastic, and form it on the surface of the conductor or inner core through a die, thereby forming the insulation layer or sheath layer of the cable.

[0003] At present, when using an extruder to produce the insulation layer and sheath layer of a cable, it is necessary to manually adjust the parameters to control the extrusion volume, and the control level is affected by the operator. Considering that the industry standards of different cables have certain lower limits on the thickness of the insulation layer and sheath layer, if the thickness is not enough, the insulation and protection performance will be reduced. Therefore, some operators will increase the extrusion volume to increase the material thickness to meet the standards.

[0004] However, industry standards also have certain upper limits on the thickness of the cable's insulation and sheath layers. If the thickness is too thick, it will not only lead to poor heat dissipation performance of the cable and affect the cable life, but will also cause waste of extrusion materials and increase extrusion costs. Summary of the invention

[0005] In view of the above technical problems, the present application aims to provide an extruder control method, device, system and extruder, which can reasonably control the production outer diameter of the cable and reduce the extrusion production cost while ensuring that the extrusion thickness of the insulation layer and the sheath layer meets industry standards.

[0006] In order to achieve the above-mentioned invention object, in a first aspect, the present application provides an extruder control method, which is applied to a controller of the extruder, comprising:

[0007] The outer diameter of the target cable is detected in real time by the outer diameter acquisition device of the extruder;

[0008] comparing the production outer diameter with the standard outer diameter range in real time;

[0009] When the production outer diameter is less than the lower limit of the standard outer diameter range, increasing the rotation speed of the extrusion screw of the extruder;

[0010] When the production outer diameter is greater than the upper limit of the standard outer diameter range, reducing the rotation speed of the extrusion screw;

[0011] When the production outer diameter is greater than or equal to the lower limit of the standard outer diameter range, and less than or equal to the lower limit of the standard outer diameter range, the rotation speed of the extrusion screw is kept unchanged;

[0012] The extrusion screw is controlled to extrude the material according to the rotation speed value.

[0013] In a possible implementation manner, increasing the rotation speed of the extrusion screw of the extruder includes:

[0014] The rotation speed of the extrusion screw is increased in a manner of gradually decreasing acceleration.

[0015] In a possible implementation manner, increasing the rotation speed of the extrusion screw in a manner of gradually decreasing acceleration includes:

[0016] Get the speed value of the extrusion screw in real time;

[0017] Determine the outer diameter error between the production outer diameter of the target cable and the lower limit of the standard outer diameter range;

[0018] Determining the acceleration in real time according to the rotation speed value and the outer diameter error;

[0019] According to the acceleration, the rotation speed value of the extrusion screw is updated in real time.

[0020] In a possible implementation manner, reducing the rotation speed of the extrusion screw includes:

[0021] The speed of the extrusion screw is reduced in a manner of gradually decreasing deceleration.

[0022] In a possible implementation manner, reducing the rotation speed of the extrusion screw in a manner of gradually decreasing the deceleration rate includes:

[0023] Get the speed value of the extrusion screw in real time;

[0024] Determine the outer diameter error between the production outer diameter of the target cable and the upper limit of the standard outer diameter range;

[0025] Determine the deceleration in real time according to the rotation speed value and the outer diameter error;

[0026] The rotation speed value of the extrusion screw is updated in real time according to the deceleration.

[0027] In a possible implementation manner, the standard outer diameter range is obtained according to the following method, including:

[0028] Obtaining a first outer diameter of the target cable before extrusion;

[0029] Obtaining the extrusion thickness of the extruded material on the target cable;

[0030] The standard outer diameter range of the target cable is determined according to the first outer diameter, the extrusion thickness, and the standard error range corresponding to the extrusion thickness.

[0031] In a possible implementation manner, the real-time detection of the production outer diameter of the target cable by an outer diameter acquisition device of the extruder includes:

[0032] The second outer diameter of the target cable in the length extension direction is obtained in real time by an outer diameter acquisition device;

[0033] The third outer diameter of the target cable in the cross-sectional direction is obtained in real time through the outer diameter acquisition device;

[0034] The production outer diameter of the target cable is determined in real time according to the second outer diameter and the third outer diameter.

[0035] In a second aspect, the present application also provides an extruder control device, comprising:

[0036] A collection module, used for detecting the production outer diameter of the target cable in real time through an outer diameter collection device of the extruder;

[0037] A comparison module, used for comparing the production outer diameter with the standard outer diameter range in real time;

[0038] A speed determination module, used for increasing the speed value of the extrusion screw of the extruder when the production outer diameter is less than the lower limit of the standard outer diameter range; reducing the speed value of the extrusion screw when the production outer diameter is greater than the upper limit of the standard outer diameter range; and maintaining the speed value of the extrusion screw unchanged when the production outer diameter is greater than or equal to the lower limit of the standard outer diameter range and less than or equal to the lower limit of the standard outer diameter range;

[0039] The control module is used to control the extrusion screw to extrude the material according to the rotation speed value.

[0040] In a third aspect, the present application also provides an extruder control system, comprising:

[0041] at least one processor, and a memory communicatively coupled to the at least one processor;

[0042] The memory stores computer-executable instructions;

[0043] The processor executes the computer-executable instructions stored in the memory to implement the method in any possible implementation of the first aspect above.

[0044] In a fourth aspect, the present application also provides an extruder, including an extruder control system in a possible implementation of the third aspect described above.

[0045] The extruder control method, device, system and extruder provided by the present application, the control method first detects the production outer diameter of the target cable in real time through the outer diameter acquisition device of the extruder, and then compares the production outer diameter with the standard outer diameter range in real time. When the production outer diameter is less than the lower limit of the standard outer diameter range, the speed value of the extrusion screw is increased. When the production outer diameter is greater than the upper limit of the standard outer diameter range, the speed value of the extrusion screw is reduced until the production outer diameter is greater than or equal to the lower limit of the standard outer diameter range and less than or equal to the lower limit of the standard outer diameter range, the speed value of the extrusion screw is kept unchanged, and finally the extrusion screw is controlled to extrude the material according to the speed value. The present application compares the production outer diameter of the target cable acquired in real time with the standard outer diameter range, and then dynamically adjusts the screw speed value according to the different situations in which the production outer diameter deviates from the standard outer diameter range, thereby changing the material extrusion speed of the extruder, so that the production outer diameter of the target cable after extrusion meets the standard outer diameter range, and ensures the production quality of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0047] Figure 1 A schematic diagram of the structure of an extruder applied to an extrusion system provided in an embodiment of the present application;

[0048] Figure 2 for Figure 1 A schematic diagram of the control in the extruder shown;

[0049] Figure 3 A flow chart of an extruder control method provided by one embodiment of the present application;

[0050] Figure 4 A flow chart of an extruder control method provided by another embodiment of the present application;

[0051] Figure 5 A flow chart of an extruder control method provided by another embodiment of the present application;

[0052] Figure 6 A schematic diagram of the structure of an extruder control device provided in one embodiment of the present application;

[0053] Figure 7 A hardware structure diagram of an extruder control system provided for one embodiment of the present application.

[0054] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0055] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0056] In the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items with substantially the same functions and effects. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit the difference.

[0057] It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete way. In the embodiments of the present application, "at least one" refers to one or more, and "more than one" refers to two or more.

[0058] It should be noted that the “at…” in the embodiments of the present application may be the instant when a certain situation occurs, or may be a period of time after the occurrence of a certain situation, and the embodiments of the present application do not specifically limit this.

[0059] In order to clearly describe the technical solutions of the embodiments of the present application, some terms and technologies involved in the embodiments of the present application are briefly introduced below:

[0060] The extruder is a production equipment for producing the insulation layer and sheath layer for the conductor or inner core in the cable manufacturing process, mainly including: pay-off device, straightening device, preheating device, cooling device, traction device, meter, spark tester, take-up device and extruder, etc. Among them, the extruder is used to fully plasticize and evenly mix the plastic, and form it on the surface of the conductor or inner core through a die, so as to form the insulation layer or sheath layer of the cable. At present, when producing the insulation layer and sheath layer of the cable, it is necessary to manually adjust the parameters to control the extrusion amount, and the control level is affected by the operator. Considering that the industry standards of different cables have a certain degree of lower limit requirements for the thickness of the insulation layer and sheath layer, if the thickness is not enough, the insulation and protection performance will be reduced. Therefore, some operators will increase the extrusion amount to increase the material thickness to meet the standards. However, the industry standards also have certain upper limits for the thickness of the insulation layer and sheath layer of the cable. If the thickness is too thick, it will not only lead to poor heat dissipation performance of the cable and affect the life of the cable, but also cause waste of extrusion materials and increase the cost of extrusion.

[0061] In order to solve the above problems, the present application provides an extruder control method, device, system and extruder, wherein the control method first detects the production outer diameter of the target cable in real time through the outer diameter acquisition device of the extruder, and then compares the production outer diameter with the standard outer diameter range in real time. When the production outer diameter is less than the lower limit of the standard outer diameter range, the speed value of the extrusion screw is increased. When the production outer diameter is greater than the upper limit of the standard outer diameter range, the speed value of the extrusion screw is reduced until the production outer diameter is greater than or equal to the lower limit of the standard outer diameter range and less than or equal to the lower limit of the standard outer diameter range. The speed value of the extrusion screw is kept unchanged, and finally the extrusion screw is controlled to extrude the material according to the speed value. The present application compares the production outer diameter of the target cable acquired in real time with the standard outer diameter range, and then dynamically adjusts the speed value of the screw according to the deviation of the production outer diameter from the standard outer diameter range, thereby changing the material extrusion speed of the extruder, so that the production outer diameter of the target cable meets the standard outer diameter range, and ensures the production quality of the cable.

[0062] Figure 1 A schematic diagram of the structure of an extruder used in an extrusion system provided in an embodiment of the present application, Figure 2 for Figure 1 The control diagram of the extruder is shown in Figure 1. Figure 1 , Figure 2 As shown, an extruder 110 includes: an outer diameter collecting device 111, a controller 112, a transmission module 113, a feeding device 114, an extrusion screw 115 and a die head 116.

[0063] Among them, the main components of the extruder are introduced below.

[0064] The outer diameter acquisition device may include a caliper and a camera. The caliper can directly measure the outer diameter of the produced cable, and the camera can capture an image of the produced cable and obtain the outer diameter through image processing. The caliper or the camera is preferably set before the target cable enters the take-up device of the extrusion system, and sends the measured outer diameter to the controller.

[0065] The controller 112 is the control core of the extruder. The controller 112 is set in the control cabinet 120. By inputting corresponding parameters through the operation interface 121 on the control cabinet 120, the standard outer diameter range of the produced cable can be directly or indirectly obtained. The controller 112 receives the production outer diameter parameters and the standard outer diameter range, and obtains the speed value applied to the extrusion screw after processing, and sends the speed value to the transmission module 113, so that the transmission module 113 controls the extrusion screw to extrude the material according to the speed value to form the insulation layer or sheath layer of the cable.

[0066] The transmission module 113 is mainly composed of a motor, a reduction gearbox, and bearings. During the plastic extrusion process, the transmission module is used to control the stability of the rotation speed of the extrusion screw 115, and cannot change with the change of the load of the extrusion screw 115, so as to ensure the uniform quality of the cable products. However, in order to make the extruder extrude different plastic thicknesses or different cable products, the extrusion screw 115 needs to be able to change speed. At this time, the transmission module 113 generally adopts devices such as AC commutator motors and DC motors to achieve stepless speed change. Generally, the extrusion screw speed is 10~100 rpm.

[0067] The feeding device 114 usually uses a conical feeding hopper, and a barrel is arranged above the hopper, and its overall volume is required to provide at least one hour's plastic consumption. There is a cut-off device at the bottom of the hopper to adjust and cut off the material flow, and a sight hole and a calibration metering device are installed on the side of the hopper. Some hoppers may also have a decompression device or a heating device to prevent the raw materials from absorbing moisture from the air, or some barrels may also have a stirrer to automatically load or add materials.

[0068] The extrusion screw 115 is the heart of the extruder and a key component of the extruder. The rotation of the extrusion screw 115 generates extreme pressure on the plastic, so that the plastic can move, increase pressure, and obtain some heat from friction in the feeding device 114. The plastic is mixed and plasticized in the process of movement. When the viscous melt is extruded and flows through the die, it obtains the desired shape and is formed.

[0069] The die head 116 is generally integrated with the die, or separately. The die head 116 is used to convert the plastic melt in rotation into parallel linear motion, so that the plastic is further plasticized evenly, and the melt is introduced into the die evenly and smoothly, and the necessary molding pressure is also applied to make the plastic easy to mold and the resulting product dense. The die is a channel with a certain cross-sectional shape. The plastic melt takes the desired shape when flowing in the die, and is cooled and hardened by the shaping device and cooling system outside the die to form the desired shape.

[0070] Figure 3 The following is a flow chart of an extruder control method provided by an embodiment of the present application. Figure 3 As shown, an extruder control method is applied to Figure 1 and Figure 2 The controller of the extruder shown may include the following steps:

[0071] S310: Detecting the production outer diameter of the target cable in real time through the outer diameter acquisition device of the extruder.

[0072] In the embodiment of the present application, in order to control the production quality of the target cable, it is necessary to ensure that the production outer diameter of the target cable meets the requirements. Therefore, this embodiment uses an outer diameter acquisition device that cooperates with the extruder to detect the production outer diameter of the target cable in real time during the production process. The production outer diameter here is determined by the outer diameter of the target cable before extrusion and the thickness of the extruded material formed on the surface. For example, the outer diameter before extrusion can be the inner core conductor diameter of the wire before the insulation layer is extruded, or the shielding layer diameter of the cable before the sheath layer is extruded. In this embodiment, the production outer diameter of the target cable is measured as a whole.

[0073] In one implementation, the production outer diameter of the target cable directly measured by a caliper may be received.

[0074] In another implementation, the production outer diameter of the target cable sent by the camera may be received, the camera may capture an image of the target cable, and the image of the target cable may be processed to determine the production outer diameter.

[0075] In a specific embodiment, the outer diameter of the target cable is detected in real time by an outer diameter acquisition device of the extruder, and the following steps may also be included:

[0076] S311: Acquire a second outer diameter of the target cable in a length extension direction in real time through an outer diameter acquisition device.

[0077] In the embodiment of the present application, the outer diameter acquisition device can detect in real time the second outer diameter of the target cable in the length extension direction after the extrusion molding is stabilized. For example, the target cable can be passed through a diameter measuring instrument to detect the second outer diameter in real time.

[0078] S312: Acquire a third outer diameter of the target cable in the cross-sectional direction in real time through an outer diameter acquisition device.

[0079] In the embodiment of the present application, the outer diameter acquisition device can acquire the third outer diameter in the cross-sectional direction of the target cable after the extrusion molding is stabilized. Specifically, the outer diameter acquisition device can use a camera set in the tangent direction of the target cable and the take-up device, so that the camera can acquire the cross-sectional projection area of ​​the target cable to determine the third outer diameter.

[0080] S313: Determine the production outer diameter of the target cable in real time according to the second outer diameter and the third outer diameter.

[0081] In one implementation, the production outer diameter of the target cable can be determined in real time by finding the average value of the second outer diameter and the third outer diameter, which can reduce the measurement error when only one direction is detected. If the relative error between the second outer diameter and the third outer diameter is large, one of the measurement results may not be accurate, and the production equipment needs to be adjusted according to the actual situation.

[0082] In another implementation, the second outer diameter or the third outer diameter may be used as the production outer diameter of the target cable, which may reduce the cost to a certain extent. In this case, step S312 or S313 may be omitted.

[0083] S320: Compare the production outer diameter with the standard outer diameter range in real time.

[0084] In the embodiment of the present application, in order to check whether the production outer diameter of the target cable meets the standard outer diameter range, it is necessary to compare the production outer diameter with the standard outer diameter range.

[0085] In a specific implementation, the standard outer diameter range is obtained according to the following method, including the following steps:

[0086] S321: Obtain a first outer diameter of the target cable before extrusion.

[0087] In the embodiment of the present application, the first outer diameter here may be the conductor diameter of the wire before injection molding, which is determined by the product of the upstream manufacturer or the previous production link.

[0088] S322: Obtain the extrusion thickness of the extruded material on the target cable.

[0089] In the embodiment of the present application, the extrusion thickness can be determined according to the industry standard of cable products. Generally speaking, the larger the first outer diameter is, the greater the extrusion thickness required for the cable is.

[0090] In the industry standard, different wires or cables have different extrusion thickness requirements. Taking 10kV cable as an example, the extrusion thickness requirement for its insulation layer is 5mm.

[0091] S323: Determine a standard outer diameter range of the target cable according to the first outer diameter, the extrusion thickness, and a standard error range corresponding to the extrusion thickness.

[0092] In one implementation, it is assumed that the first outer diameter of the target cable before extrusion is , extrusion thickness is , the standard error range corresponding to the extrusion thickness can be taken as ±5%, where the lower limit deviation of the standard error range is , the upper limit deviation is The standard error range is At this time, the lower limit of the standard outer diameter range of the target cable is , the lower limit is . The following is a specific example for illustration:

[0093] For example, the first outer diameter of the cable before extrusion is 15mm, the extrusion thickness is 2.5mm, the lower limit deviation is 0.1mm, and the upper limit deviation is 0.3mm, that is, the standard error range is -0.1mm~0.3mm, then the lower limit value of the standard outer diameter range of the target cable is 19.8mm, and the upper limit value is 20.6mm. At this time, the standard outer diameter range of the target cable is 19.8mm~20.6mm.

[0094] In another implementation, the standard outer diameter range may also be determined by directly inputting the upper and lower limits of the outer diameter of the target cable through manual calculation.

[0095] When the controller obtains the standard outer diameter range, it can adjust the change of extrusion thickness according to the real-time detected production outer diameter to make it meet the industry standard.

[0096] S330: When the production outer diameter is less than the lower limit of the standard outer diameter range, increase the speed of the extrusion screw of the extruder; when the production outer diameter is greater than the upper limit of the standard outer diameter range, reduce the speed of the extrusion screw; when the production outer diameter is greater than or equal to the lower limit of the standard outer diameter range and less than or equal to the lower limit of the standard outer diameter range, keep the speed of the extrusion screw unchanged.

[0097] In the embodiment of the present application, the production outer diameter d1 is detected in real time in step S310, and then compared in step S320 to obtain the size relationship between the production outer diameter and the standard outer diameter range.

[0098] Assume that the lower limit value of the standard outer diameter range is d2, and the upper limit value of the standard outer diameter range is d3.

[0099] If d1<d2, it means that the outer diameter of the current target cable is too small and does not meet the standard outer diameter range. At this time, it is necessary to increase the speed of the extruder screw to increase the plastic extrusion speed and increase the extrusion thickness of the insulation layer accordingly. As the extrusion thickness increases, the real-time detected production outer diameter d1 will also increase. When d1 continues to increase to meet the standard outer diameter range, that is, d2≤d1≤d3, the extrusion screw speed value is kept unchanged.

[0100] If d1>d2, it means that the outer diameter of the current target cable is too large and does not meet the standard outer diameter range. At this time, it is necessary to reduce the speed of the extruder screw, thereby reducing the extrusion speed of the plastic and correspondingly reducing the extrusion thickness of the insulation layer. As the extrusion thickness decreases, the real-time detected production outer diameter d1 will also decrease. When d1 continues to decrease to meet the standard outer diameter range, that is, d2≤d1≤d3, the extrusion screw speed value remains unchanged.

[0101] If the real-time detected production outer diameter d1 meets the standard outer diameter range from the beginning, the rotation speed value of the extrusion screw is also kept unchanged.

[0102] During the extrusion process, even if the speed of the extrusion screw remains unchanged, the extrusion speed will change due to factors such as the working state of the equipment, ambient temperature, and extrusion materials. If it is detected in real time during the production process that the production outer diameter deviates from the standard outer diameter range, the speed of the extrusion screw can be intelligently adjusted through the above method so that the production outer diameter of the target cable meets the standard outer diameter range.

[0103] S340: Control the extrusion screw to extrude materials according to the speed value.

[0104] In the embodiment of the present application, after the controller obtains the speed value of the extrusion screw according to step S330, the speed value can be sent to the transmission module. The transmission module controls the extrusion screw to work according to the speed value, thereby producing the target cable.

[0105] In the above embodiment, the control method compares the production outer diameter of the target cable collected in real time with the standard outer diameter range, and then dynamically adjusts the screw speed value according to the different situations in which the production outer diameter deviates from the standard outer diameter range, thereby changing the extrusion speed of the extruder, so that the production outer diameter of the target cable is adjusted to meet the standard outer diameter range, ensuring that the extrusion thickness meets industry standards, improving the production quality of the cable, and reducing the production cost.

[0106] Figure 4 A flowchart of an extruder control method provided in another embodiment of the present application. Figure 3 Based on the embodiment shown, the specific process of increasing and decreasing the speed value of the extrusion screw is also optimized. Figure 4As shown, the extruder control method provided in this embodiment may include the following steps:

[0107] S410: Detecting the production outer diameter of the target cable in real time through the outer diameter acquisition device of the extruder.

[0108] In the embodiment of the present application, the specific process can be referred to Figure 3 The description of step S310 in the illustrated embodiment will not be repeated here.

[0109] S420: Compare the production outer diameter with the standard outer diameter range in real time.

[0110] In the embodiment of the present application, the specific process can be referred to Figure 3 The description of S320 in the embodiment is not repeated here.

[0111] S430: When the production outer diameter is smaller than the lower limit of the standard outer diameter range, the speed of the extrusion screw is increased with a gradually decreasing acceleration; when the production outer diameter is larger than the upper limit of the standard outer diameter range, the speed of the extrusion screw is reduced with a gradually decreasing deceleration; when the production outer diameter is greater than or equal to the lower limit of the standard outer diameter range, and less than or equal to the lower limit of the standard outer diameter range, the speed of the extrusion screw is kept unchanged.

[0112] In the embodiment of the present application, when the speed value of the extrusion screw is increased or decreased, generally speaking, it can be increased with uniform acceleration or decreased with uniform deceleration.

[0113] Taking uniform acceleration as an example, when the speed of the extrusion screw increases uniformly from V0 to V1, the required time T is (V1-V0) / a, where a is the acceleration, which is a constant value. When the speed of the extrusion screw is V1, the production outer diameter is equal to the lower limit of the standard outer diameter range.

[0114] If the speed of the extruder screw can be increased in a way that the acceleration gradually decreases, for example, the acceleration of the speed is large at the beginning (significantly greater than a), and then the acceleration gradually decreases, and the speed value increases slowly, this method can increase the speed value from V0 to V1 at a faster speed. In this way, the low extrusion thickness can be adjusted to the desired extrusion thickness more quickly, and at the end, the speed value acceleration changes more smoothly to the stable speed value.

[0115] Similarly, when the speed value of the extrusion screw needs to be reduced, the speed value of the extrusion screw is controlled to be reduced in a manner of gradually decreasing deceleration. The specific analysis process can refer to the description of the increase in the speed value, which will not be repeated here.

[0116] S440: Control the extrusion screw to extrude materials according to the speed value.

[0117] In the embodiment of the present application, the specific process can be referred to Figure 3 The description of step S310 in the illustrated embodiment will not be repeated here.

[0118] In the above embodiment, when the production outer diameter is smaller than the lower limit of the standard outer diameter range, the speed of the extrusion screw is controlled to increase in a manner of gradually decreasing acceleration; when the production outer diameter is larger than the upper limit of the standard outer diameter range, the speed of the extrusion screw is controlled to decrease in a manner of gradually decreasing deceleration, thereby making the speed of the extrusion screw reach a reasonable speed, but being able to make the production outer diameter conform to the standard outer diameter range, and also being able to adjust the deviated production outer diameter to within the standard outer diameter range as soon as possible, saving time adjustment costs and material costs.

[0119] Figure 5 A flowchart of an extruder control method provided in another embodiment of the present application. Figure 4 Based on the embodiment shown, the acceleration control of the extrusion screw speed value in the extruder is mainly improved. Figure 5 As shown, the extruder control method provided in this embodiment may include the following steps:

[0120] S510: Detecting the production outer diameter of the target cable in real time through the outer diameter acquisition device of the extruder.

[0121] In the embodiment of the present application, the specific process can be referred to Figure 3 The description of S310 in the embodiment is not repeated here.

[0122] S520: Compare the production outer diameter with the standard outer diameter range in real time.

[0123] In the embodiment of the present application, the specific process can be referred to Figure 3 The description of S320 in the embodiment is not repeated here.

[0124] exist Figure 4 In the illustrated embodiment, even if the speed value of the extrusion screw can be increased in a manner of gradually decreasing acceleration or decreased in a manner of gradually decreasing deceleration, there are still a variety of acceleration or deceleration methods, especially if the rate of change of acceleration is slow, there is still a problem that the speed change time is not fast enough. Therefore, in this embodiment, the acceleration or deceleration is adjusted through steps S530 to S560. In steps S530 to S560, the speed value adjustment of the extrusion screw is explained by the situation that the real-time detected production outer diameter is less than the lower limit of the standard outer diameter range.

[0125] S530: When the production outer diameter is smaller than the lower limit of the standard outer diameter range, the rotation speed value of the extrusion screw is obtained in real time.

[0126] In the embodiment of the present application, in order to adjust the rotation speed value of the extrusion screw, it is required to collect the rotation speed value of the extrusion screw in real time, and the rotation speed value at this time is used as the initial speed for each adjustment.

[0127] S540: Determine an outer diameter error between the production outer diameter of the target cable and a lower limit of the standard outer diameter range.

[0128] In the embodiment of the present application, firstly, the difference between the real-time detected production outer diameter of the target cable and the lower limit of the standard outer diameter range, that is, the outer diameter error, is determined.

[0129] S550: Determine the acceleration in real time according to the rotation speed value and the outer diameter error.

[0130] In the embodiment of the present application, it can be understood that when the outer diameter error is larger, the current speed can be increased to a reasonable speed faster, and the acceleration in the early stage should be larger. When the outer diameter error is smaller, the acceleration should be smaller, until the production outer diameter reaches the lower limit of the standard outer diameter range, at which time the acceleration should be 0.

[0131] Assuming that the outer diameter error detected in real time is x, the speed value needs to be increased from the current speed value V0 to V1, then V1=V0+At, and the acceleration A can change according to the following rule: A=f(x) (x≥0), where A is an increasing function of the outer diameter error x, and when x is equal to 0, the acceleration is 0, and the speed value V0 increases to V1.

[0132] S560: Update the speed value of the extrusion screw in real time according to the acceleration.

[0133] In this embodiment, the speed value of the extrusion screw is updated in real time according to the acceleration change function obtained in step S550. It can be seen that when the outer diameter error x is larger, the acceleration is larger, and when the outer diameter error x is 0, the speed value is just accelerated to V1, and the speed value is kept unchanged.

[0134] If the real-time detected production outer diameter is greater than the lower limit of the standard outer diameter range, the speed of the extrusion screw can be adjusted by referring to steps S530 to S560, which specifically include:

[0135] The speed value of the extrusion screw is obtained in real time; the outer diameter error between the production outer diameter of the target cable and the upper limit of the standard outer diameter range is determined; the deceleration is determined in real time according to the speed value and the outer diameter error; the speed value of the extrusion screw is updated in real time according to the deceleration.

[0136] S570: When the production outer diameter is greater than or equal to the lower limit of the standard outer diameter range, and less than or equal to the lower limit of the standard outer diameter range, the speed of the extrusion screw is kept unchanged.

[0137] In the embodiment of the present application, when the rotation speed value is increased to V1 through the above steps, the production outer diameter is equal to the lower limit value of the standard outer diameter range, and at this time, the controller controls the rotation speed value of the extrusion screw to be maintained at V1.

[0138] S580: Control the extrusion screw to extrude materials according to the speed value.

[0139] In the embodiment of the present application, the specific process can be referred to Figure 3 The description of S310 in the embodiment is not repeated here.

[0140] In the above embodiment, the acceleration is controlled through steps S530~S560 to reasonably adjust the speed value of the extrusion screw, so that the extrusion screw can reach a reasonable speed at a relatively stable speed. At this time, at this reasonable speed, the production outer diameter of the target cable can meet the standard outer diameter range. Among them, when the speed value of the extrusion screw reaches the reasonable speed value, the speed acceleration of the extrusion screw is just zero.

[0141] Figure 6 This is a schematic diagram of the structure of an extruder control device provided by an embodiment of the present application. The device may be in the form of software and / or hardware. Figure 1 and Figure 2 The extruder control device includes: a collection module 601, a comparison module 602, a rotation speed determination module 603 and a control module 604.

[0142] The acquisition module 601 is used to detect the production outer diameter of the target cable in real time through the outer diameter acquisition device of the extruder.

[0143] The comparison module 602 is used to compare the production outer diameter with the standard outer diameter range in real time.

[0144] The speed determination module 603 is used to increase the speed value of the extrusion screw of the extruder when the production outer diameter is smaller than the lower limit value of the standard outer diameter range; reduce the speed value of the extrusion screw when the production outer diameter is larger than the upper limit value of the standard outer diameter range; and keep the speed value of the extrusion screw unchanged when the production outer diameter is greater than or equal to the lower limit value of the standard outer diameter range and less than or equal to the lower limit value of the standard outer diameter range.

[0145] The control module 604 is used to control the extrusion screw to produce the target cable according to the rotation speed value.

[0146] In some embodiments, the rotation speed determination module 603 is specifically configured to increase the rotation speed value of the extrusion screw in a manner of gradually decreasing acceleration.

[0147] In some embodiments, the speed determination module 603 is specifically used to obtain the speed value of the extrusion screw in real time; determine the outer diameter error between the production outer diameter of the target cable and the lower limit of the standard outer diameter range; determine the acceleration in real time based on the speed value and the outer diameter error; and update the speed value of the extrusion screw in real time based on the acceleration.

[0148] In some embodiments, the rotation speed determination module 603 is specifically configured to reduce the rotation speed of the extrusion screw in a manner of gradually decreasing the deceleration rate.

[0149] In some embodiments, the speed determination module 603 is specifically used to obtain the speed value of the extrusion screw in real time; determine the outer diameter error between the production outer diameter of the target cable and the upper limit value of the standard outer diameter range; determine the deceleration in real time based on the speed value and the outer diameter error; and update the speed value of the extrusion screw in real time based on the deceleration.

[0150] In some embodiments, the extruder control device also includes: an acquisition module for acquiring a first outer diameter of the target cable before extrusion; acquiring the extrusion thickness of the extruded material on the target cable; and determining a standard outer diameter range of the target cable based on the first outer diameter, the extrusion thickness, and a standard error range corresponding to the extrusion thickness.

[0151] In some embodiments, the acquisition module 601 is specifically used to obtain the second outer diameter of the target cable in the length extension direction in real time through an outer diameter acquisition device; obtain the third outer diameter of the target cable in the cross-sectional direction in real time through an outer diameter acquisition device; and determine the production outer diameter of the target cable in real time based on the second outer diameter and the third outer diameter.

[0152] Figure 7 A hardware structure diagram of an extruder control system provided in one embodiment of the present application. This embodiment provides an extruder control system, comprising: at least one processor 701, and a memory 702 in communication with the at least one processor 701; the memory 702 stores computer-executable instructions; the processor 701 executes the computer-executable instructions stored in the memory 702 to implement the control method described in any of the above embodiments.

[0153] Figure 7 The extruder control system shown also includes a communication interface 703 and a communication bus 704, wherein the processor 701, the memory 702 and the communication interface 703 are connected to each other via the communication bus 704. The communication bus 704 can be divided into an address bus, a data bus, a control bus, etc. Figure 7 In the figure, only one thick line is used to represent the communication bus 704, but it does not mean that there is only one communication bus 704 or one type of communication bus 704. The processor 701 may also be called a controller, and there is no limitation on the name.

[0154] In the embodiment of the present application, the memory 702 stores instructions that can be executed by at least one processor 701. The at least one processor 701 can execute the control method discussed above by executing the instructions stored in the memory 702. The processor 701 can implement Figure 7 The functions of each module in the device shown.

[0155] Among them, the processor 701 is the control center of the device, and can use various interfaces and lines to connect the various parts of the entire control device. By running or executing instructions stored in the memory 702 and calling data stored in the memory 702, the various functions of the device and process data, the device can be monitored as a whole.

[0156] In one possible design, the processor 701 may include one or more processing units, and the processor 701 may integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the modem processor may not be integrated into the processor 701. In some embodiments, the processor 701 and the memory 702 may be implemented on the same chip or on separate chips.

[0157] The processor 701 may be a general-purpose processor, such as a central processing unit (CPU), a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the control method disclosed in the embodiments of the present application may be directly embodied as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0158] The memory 702 is a non-volatile computer-readable storage medium that can be used to store non-volatile software programs, non-volatile computer executable programs and modules. The memory 702 may include at least one type of storage medium, such as a flash memory, a hard disk, a multimedia card, a card-type memory, a random access memory (Random Access Memory, RAM), a static random access memory (Static Random Access Memory, SRAM), a programmable read-only memory (Programmable Read Only Memory, PROM), a read-only memory (Read Only Memory, ROM), an electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), a magnetic memory, a disk, an optical disk, etc. The memory 702 is any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer, but is not limited thereto. The memory 702 in the embodiment of the present application can also be a circuit or any other device that can realize a storage function, for storing program instructions and / or data.

[0159] By programming the processor 701, the code corresponding to the control method described in the above embodiment can be fixed into the chip, so that the chip can execute the control method when running. Figure 3 The steps of the control method of the embodiment shown are as follows: How to design and program the processor 701 is a technique well known to those skilled in the art and will not be described in detail here.

[0160] The embodiment of the present application also provides an extruder, which includes an outer diameter collection device, a controller, a transmission module, a feeding device, an extrusion screw, a die head, and an extruder control system described in any of the above embodiments. The extruder provided by the embodiment of the present application can collect the production outer diameter of the target cable in real time and compare it with the standard outer diameter range, and then dynamically adjust the screw speed value according to the different situations in which the production outer diameter deviates from the standard outer diameter range, thereby changing the extrusion speed of the extruder, so that the production outer diameter of the target cable meets the standard outer diameter range, ensuring the production quality of the cable and reducing the production cost.

[0161] The embodiment of the present application also provides a computer-readable storage medium, in which a computer-executable instruction is stored. When the computer-executable instruction is executed by a processor, it is used to implement the control method described in any of the above embodiments. Therefore, it will not be described in detail here. In addition, the description of the beneficial effects of the same method will not be described in detail. For technical details not disclosed in the computer storage medium embodiment involved in the present invention, please refer to the description of the method embodiment of the present invention.

[0162] In some possible implementations, various aspects of the control method provided in the present application may also be implemented in the form of a program product, which includes a program code. When the program product is run on an apparatus, the program code is used to enable the control device to execute the steps of the control method according to various exemplary implementations of the present application described above in this specification.

[0163] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0164] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0165] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0166] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0167] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. An extruder control method, characterized in that: A controller applied to the extruder comprises: The outer diameter of the target cable is detected in real time by the outer diameter acquisition device of the extruder; comparing the production outer diameter with the standard outer diameter range in real time; When the production outer diameter is less than the lower limit of the standard outer diameter range, increasing the rotation speed of the extrusion screw of the extruder; When the production outer diameter is greater than the upper limit of the standard outer diameter range, reducing the rotation speed of the extrusion screw; When the production outer diameter is greater than or equal to the lower limit of the standard outer diameter range, and less than or equal to the lower limit of the standard outer diameter range, the rotation speed of the extrusion screw is kept unchanged; The extrusion screw is controlled to extrude the material according to the rotation speed value.

2. The extruder control method according to claim 1, characterized in that: The step of increasing the rotation speed of the extrusion screw of the extruder comprises: The rotation speed of the extrusion screw is increased in a manner of gradually decreasing acceleration.

3. The extruder control method according to claim 2, characterized in that: The step of increasing the rotation speed of the extrusion screw in a manner of gradually decreasing acceleration includes: Get the speed value of the extrusion screw in real time; Determine the outer diameter error between the production outer diameter of the target cable and the lower limit of the standard outer diameter range; Determining the acceleration in real time according to the rotation speed value and the outer diameter error; According to the acceleration, the rotation speed value of the extrusion screw is updated in real time.

4. The extruder control method according to claim 1, characterized in that: The step of reducing the rotation speed of the extrusion screw comprises: The speed of the extrusion screw is reduced in a manner of gradually decreasing deceleration.

5. The extruder control method according to claim 4, characterized in that: The step of reducing the rotation speed of the extrusion screw by gradually decreasing the deceleration speed comprises: Get the speed value of the extrusion screw in real time; Determine the outer diameter error between the production outer diameter of the target cable and the upper limit of the standard outer diameter range; Determine the deceleration in real time according to the rotation speed value and the outer diameter error; The rotation speed value of the extrusion screw is updated in real time according to the deceleration.

6. The extruder control method according to claim 1, characterized in that: The standard outer diameter range is obtained according to the following method, including: Obtaining a first outer diameter of the target cable before extrusion; Obtaining the extrusion thickness of the extruded material on the target cable; The standard outer diameter range of the target cable is determined according to the first outer diameter, the extrusion thickness, and the standard error range corresponding to the extrusion thickness.

7. The extruder control method according to claim 1, characterized in that: The method of detecting the production outer diameter of the target cable in real time by using the outer diameter acquisition device of the extruder comprises: The second outer diameter of the target cable in the length extension direction is obtained in real time by an outer diameter acquisition device; The third outer diameter of the target cable in the cross-sectional direction is obtained in real time through the outer diameter acquisition device; The production outer diameter of the target cable is determined in real time according to the second outer diameter and the third outer diameter.

8. An extruder control device, characterized in that: include: A collection module, used for detecting the production outer diameter of the target cable in real time through an outer diameter collection device of the extruder; A comparison module, used for comparing the production outer diameter with the standard outer diameter range in real time; A speed determination module, used for increasing the speed value of the extrusion screw of the extruder when the production outer diameter is less than the lower limit of the standard outer diameter range; reducing the speed value of the extrusion screw when the production outer diameter is greater than the upper limit of the standard outer diameter range; and maintaining the speed value of the extrusion screw unchanged when the production outer diameter is greater than or equal to the lower limit of the standard outer diameter range and less than or equal to the lower limit of the standard outer diameter range; The control module is used to control the extrusion screw to extrude the material according to the rotation speed value.

9. An extruder control system, characterized in that: include: at least one processor, and a memory communicatively coupled to the at least one processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 7.

10. An extruder, characterized in that: Includes the extruder control system as described in claim 9.

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