Manufacturing method applied to high-fluidity polyphenylene sulfide sheet
Through drying, electrostatic adhesion, online thickness adjustment and longitudinal stretching treatment, the problem of large thickness deviation of polyphenylene sulfide sheet is solved, and the thickness uniformity and physical characteristics of high-flow polyphenylene sulfide sheet are achieved. Uniformity.
Patent Information
- Application Number
- CN202411429211.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2024-12-10
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
During the manufacturing process of high-flow polyphenylene sulfide sheets, pre-drying cannot guarantee the degradation of the polyphenylene sulfide melt during the plasticization process, resulting in a long conversion time of the polyphenylene sulfide melt from the molten state to the glass state, resulting in a sheet The thickness of the material is large.
Using a manufacturing method including a drying device, an electrostatic attaching device, an online thickness detection device and a longitudinal stretching device, the uniformity of the polyphenylene sulfide melt is ensured through drying treatment, an electrostatic attaching treatment, an online thickness adjustment and a longitudinal stretching treatment. The quality of the electrostatic adhesion process is improved, and the precise control of sheet thickness is achieved by controlling the longitudinal tensile stress distribution.
It effectively improves the thickness uniformity of the high-flow polyphenylene sulfide sheet, reduces the sheet thickness deviation, and ensures the uniformity of physical characteristics during the stretching process.
Smart Images
Figure CN119099153A_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present disclosure relate to the field of manufacturing high-fluidity polyphenylene sulfide sheets, and more particularly to a manufacturing method for high-fluidity polyphenylene sulfide sheets. Background Art
[0002] The existing technology mainly relies on dry polyphenylene sulfide raw materials and calendering casting process. At present, when manufacturing high-fluidity polyphenylene sulfide sheets, the commonly used method is: using dry polyphenylene sulfide raw materials and reducing the moisture content in the molten state through the electrostatic attachment casting casting process, which can reduce the time interval between the molten state of the polyphenylene sulfide melt flowing out of the die head and the contact with the casting roller (cooling roller).
[0003] However, it is found in practice that when the above method is used to manufacture high-fluidity polyphenylene sulfide sheets, the following technical problems often occur:
[0004] Pre-drying cannot guarantee the degradation of the polyphenylene sulfide melt during the plasticization process. The polyphenylene sulfide melt takes a long time to transition from the molten state to the glass state, resulting in large thickness deviation of high-end polyphenylene sulfide sheets.
[0005] The above information disclosed in this Background section is only for enhancement of understanding of the background of the inventive concept and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art. Summary of the invention
[0006] The content of this disclosure is used to introduce concepts in a brief form, which will be described in detail in the detailed implementation section below. The content of this disclosure is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.
[0007] Some embodiments of the present disclosure provide a method for manufacturing a high-flow polyphenylene sulfide sheet to solve one or more of the technical problems mentioned in the above background technology section.
[0008] In a first aspect, some embodiments of the present disclosure provide a method for manufacturing a high-fluidity polyphenylene sulfide sheet, which is applied to a high-fluidity polyphenylene sulfide sheet preparation device, wherein the high-fluidity polyphenylene sulfide sheet preparation device comprises: a drying device, an electrostatic attachment device, an online thickness detection device, and a longitudinal stretching device. The method comprises: adding a polyphenylene sulfide raw material to an empty drying device for drying treatment to obtain a polyphenylene sulfide melt, wherein the drying device is connected to the electrostatic attachment device, the electrostatic attachment device is connected to the online thickness detection device, and the online thickness detection device is connected to the longitudinal stretching device; inputting the polyphenylene sulfide melt into the electrostatic attachment device for electrostatic attachment treatment to obtain an electrostatically attached casting; inputting the electrostatically attached casting into an online thickness detection device for online thickness uniformity adjustment treatment to obtain a uniform polyphenylene sulfide sheet; inputting the uniform polyphenylene sulfide sheet into a longitudinal stretching device for longitudinal stretching treatment to obtain a high-fluidity polyphenylene sulfide sheet.
[0009] In a second aspect, some embodiments of the present disclosure provide an electronic device comprising: one or more processors; a storage device on which one or more programs are stored, and when the one or more programs are executed by the one or more processors, the one or more processors implement the method described in any implementation manner of the above-mentioned first aspect.
[0010] In a third aspect, some embodiments of the present disclosure provide a computer-readable medium having a computer program stored thereon, wherein when the program is executed by a processor, the method described in any implementation manner of the first aspect is implemented.
[0011] The above-mentioned various embodiments of the present disclosure have the following beneficial effects: through the manufacturing method applied to high-fluidity polyphenylene sulfide sheets of some embodiments of the present disclosure, the thickness uniformity of the fluidity polyphenylene sulfide sheets can be improved. Specifically, the reason for the large thickness deviation of the high-fluidity polyphenylene sulfide sheets is that the pre-drying cannot guarantee the degradation of the polyphenylene sulfide melt during the plasticization process, and the polyphenylene sulfide melt has a long transition time from the molten state to the glass state. Based on this, the manufacturing method applied to high-fluidity polyphenylene sulfide sheets of some embodiments of the present disclosure, first, the polyphenylene sulfide raw material is added to an empty drying device for drying treatment to obtain a polyphenylene sulfide melt, wherein the drying device is connected to an electrostatic attachment device, the electrostatic attachment device is connected to an online thickness detection device, and the online thickness detection device is connected to a longitudinal stretching device. Thus, the uniformity and stability of the polyphenylene sulfide melt during the processing can be ensured. Secondly, the above-mentioned polyphenylene sulfide melt is input into the electrostatic attachment device for electrostatic attachment treatment to obtain an electrostatically attached casting. Thus, the quality of the electrostatic attachment process can be improved. Then, the electrostatically attached casting sheet is input into an online thickness detection device for online thickness uniformity adjustment to obtain a uniform polyphenylene sulfide sheet. Thus, accurate thickness control can be achieved. Finally, the uniform polyphenylene sulfide sheet is input into a longitudinal stretching device for longitudinal stretching to obtain a high-fluidity polyphenylene sulfide sheet. Thus, by controlling the stress distribution during the longitudinal stretching process and ensuring that the sheet maintains uniform physical properties during the stretching process, the thickness uniformity of the fluid polyphenylene sulfide sheet can be improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that components and elements are not necessarily drawn to scale.
[0013] Figure 1 is a flow chart of some embodiments of a method for manufacturing a high-flowability polyphenylene sulfide sheet according to the present disclosure;
[0014] Figure 2 is a schematic block diagram of a drying device suitable for implementing some embodiments of the present disclosure;
[0015] Figure 3 is a screenshot of an internal test operation page of a drying device in some embodiments of the present disclosure;
[0016] Figure 4 This is a schematic screenshot of an internal test of the online monitoring page for online thickness uniform adjustment disclosed in the present invention. DETAILED DESCRIPTION
[0017] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.
[0018] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.
[0019] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.
[0020] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".
[0021] The names of the messages or information exchanged between multiple devices in the embodiments of the present disclosure are only used for illustrative purposes and are not used to limit the scope of these messages or information.
[0022] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.
[0023] Figure 1 The flowchart of some embodiments of the method for manufacturing a high-flow polyphenylene sulfide sheet according to the present disclosure is shown. The process 100 of some embodiments of the method for manufacturing a high-flow polyphenylene sulfide sheet according to the present disclosure is shown. The method for manufacturing a high-flow polyphenylene sulfide sheet is applied to a high-flow polyphenylene sulfide sheet preparation device, and includes the following steps:
[0024] Step 101: Add the polyphenylene sulfide raw material into an empty drying device for drying to obtain a polyphenylene sulfide melt.
[0025] In some embodiments, the execution subject of the method for manufacturing high-fluidity polyphenylene sulfide sheets can add the polyphenylene sulfide raw material to an empty drying device for drying to obtain a polyphenylene sulfide melt. The above-mentioned high-fluidity polyphenylene sulfide sheet preparation device includes: a drying device, an electrostatic attachment device, an online thickness detection device, and a longitudinal stretching device. Among them, the drying device is connected to the electrostatic attachment device, the electrostatic attachment device is connected to the online thickness detection device, and the online thickness detection device is connected to the longitudinal stretching device.
[0026] In practice, the above-mentioned execution entity can add the polyphenylene sulfide raw material into the empty drying device for drying through the following steps:
[0027] The first step is to control the drying temperature control device to set the drying duration of the polyphenylene sulfide raw material in the drying silo within a preset duration interval, wherein the preset duration interval may be: the drying duration is greater than 4 hours.
[0028] The second step is to control the drying temperature control device to raise the temperature of the polyphenylene sulfide raw material in the drying silo to a temperature within the range of 140-170°C.
[0029] The third step is to control the dew point meter to set the dew point to -50°C.
[0030] The fourth step is to control the first air volume regulating device to set the air volume to 500 cubic meters per hour.
[0031] The fifth step is to add the above polyphenylene sulfide raw material into the above drying silo for drying to obtain dry polyphenylene sulfide raw material.
[0032] The sixth step is to convey the dried polyphenylene sulfide raw material to the extruder for melting treatment to obtain a polyphenylene sulfide melt.
[0033] Here, the drying device can refer to Figure 2 The structural schematic diagrams of some embodiments of the drying device are shown, such as Figure 2As shown, the drying device comprises: a drying temperature control device 1, a drying silo 2, a metal separator 3, a first air volume regulating device 4, an extruder 5, a cyclone separator 6, a pulse dust collector 7, a second air volume regulating device 8, a first heat exchanger 9, a first cooling device 10, a second cooling device 11, a second heat exchanger 12, a dehumidification system 13, a dew point meter 14, and an alarm device 15. Among them, the drying temperature control device 1 is connected to the drying silo 2; the drying silo 2 is respectively connected to the metal separator 3, the extruder 5, and the cyclone separator 6; the cyclone separator 6 is connected to the pulse dust collector 7; the pulse dust collector 7 is connected to the second air volume regulating device 8; the second air volume regulating device 8 is connected to the first cooling device 10; the extruder 5 is respectively connected to the first cooling device 10 and the second cooling device 11; the first heat exchanger 9 is respectively connected to the first cooling device 10 and the dehumidification system 13. Functions of each component in the drying device: the drying temperature control device 1 is used to adjust and maintain the temperature required during the drying process. The drying silo 2 is used to store the polyphenylene sulfide raw material to be dried. The metal separator 3 is used to remove metal impurities in the polyphenylene sulfide raw material. The first air volume regulating device 4 is used to control the air volume entering the drying system. The extruder 5 is used to heat-melt the polyphenylene sulfide raw material into a polyphenylene sulfide melt. The cyclone separator 6 is used to separate solid particles and gas in the air flow. The pulse dust collector 7 is used to remove dust in the gas. The second air volume regulating device 8 is used to further adjust the air volume. The first heat exchanger 9 is used to preheat the air or cool the air flow. The first cooling device 10 is used to cool the dried polyphenylene sulfide raw material. The second cooling device 11 is used to further cool the polyphenylene sulfide raw material. The second heat exchanger 12 is used to further adjust the temperature of the gas or the polyphenylene sulfide raw material. The dehumidification system 13 is used to remove moisture from the air flow. The dew point meter 14 is used to measure the dew point of the gas. The alarm device 15 is used to sound an alarm when the system is abnormal. Polyphenylene sulfide raw material circulation process: First, the polyphenylene sulfide raw material is stored in the drying silo 2. The polyphenylene sulfide raw material will be transported from the drying silo 2 to the metal separator 3 through a pipeline to remove metal impurities. The separated polyphenylene sulfide raw material is further transported to the extruder 5 through a pipeline. Secondly, in the extruder 5, the raw material is heated and melted to become a polyphenylene sulfide melt. The exhaust gas of the extruder 5 contains solid particles, and these gases are transported to the cyclone separator 6 through a pipeline to separate solids and gases. Next, the gas treated by the cyclone separator 6 then enters the pulse dust collector 7 to remove dust. The treated gas will pass through the second air volume regulating device 8, and after adjusting the air volume, it will enter the first heat exchanger 9 for preheating. Then, after heat exchange, the gas enters the dehumidification system 13 to remove excess moisture. The polyphenylene sulfide melt produced by the extruder 5 needs to be initially cooled by the first cooling device 10. Then, the melt passing through the first cooling device 10 continues to flow to the second cooling device 11 for further cooling. Then, the cooling medium (such as air or water) used in the first cooling device 10 is heat exchanged in the first heat exchanger 9 to recover heat.The dew point meter 14 monitors the humidity of the gas to ensure that it meets the requirements of the drying process. Finally, the sensors and monitoring equipment in the entire system are connected to the alarm device 15, and once an abnormal situation is detected, the alarm device will sound an alarm. For example, the drying temperature control device 1 can be: a temperature sensor, a temperature controller. The drying silo 2 can be: an airflow drying silo, a heating drying silo. The metal separator 3 can be: a magnetic separator, an electromagnetic separator. The first air volume adjustment device 4 can be: a variable frequency fan, a wind valve device. The extruder 5 can be: a single screw extruder, a twin screw extruder. The cyclone separator 6 can be: a standard cyclone separator, a multi-stage cyclone separator. The pulse dust collector 7 can be: a single bin pulse dust collector, a multi-bin pulse dust collector. The second air volume adjustment device 8 can be: a variable frequency fan, a wind valve device. The first heat exchanger 9 can be: a shell and tube heat exchanger, a plate heat exchanger. The first cooling device 10 can be: an air cooler, a refrigerator. The second cooling device 11 can be: an air cooler, a refrigerator. The second heat exchanger 12 may be a shell and tube heat exchanger or a plate heat exchanger. The dehumidification system 13 may be a condensation dehumidification system or a desiccant dehumidification system. The dew point meter 14 may be a capacitor dew point meter or a cooling mirror dew point meter. The alarm device 15 may be a temperature alarm or a water immersion alarm.
[0034] Further references Figure 3 , Figure 3 This is a screenshot of an internal test operation page of the drying equipment in some embodiments of the present disclosure, which can be viewed through Figure 3 The example operation page operates and controls the various devices involved in the drying equipment (drying temperature control device 1, drying silo 2, metal separator 3, first air volume adjustment device 4, extruder 5, cyclone separator 6, pulse dust collector 7, second air volume adjustment device 8, first heat exchanger 9, first cooling device 10, second cooling device 11, second heat exchanger 12, dehumidification system 13, dew point meter 14, alarm device 15).
[0035] Step 102: input the polyphenylene sulfide melt into an electrostatic bonding device for electrostatic bonding treatment to obtain an electrostatic bonding casting sheet.
[0036] In some embodiments, the execution entity may input the polyphenylene sulfide melt into an electrostatic attachment device for electrostatic attachment treatment to obtain an electrostatic attachment casting sheet.
[0037] Among them, the electrostatic attachment device includes: a die head, a film-threading roller, a first auxiliary winding machine, a temperature control device, a humidity control device, a voltage control device, a spacing control device, a separation electrode box, an electrostatic wire, a Y-axis brake motor, an X-axis stepper motor, an X-axis sensor, and a Y-axis sensor. Among them, the die head is connected to the film-threading roller and the temperature control device respectively; the film-threading roller is connected to the first auxiliary winding machine and the temperature control device respectively; the voltage control device is connected to the electrostatic wire; the spacing control device is connected to the electrostatic wire, the die head, and the film-threading roller respectively; the Y-axis brake motor is connected to the Y-axis sensor; the X-axis stepper motor is connected to the X-axis sensor; the separation electrode box is connected to the temperature control device, the humidity control device, the voltage control device, the spacing control device, the electrostatic wire, the Y-axis brake motor, the X-axis stepper motor, the X-axis sensor, and the Y-axis sensor respectively. The functions of each component in the electrostatic attachment device: the die head is responsible for forming a uniform film from the polyphenylene sulfide melt. The film-threading roller is used to assist the film to pass through and perform preliminary cooling and shaping. The first auxiliary winder is used to wind the film after electrostatic attachment. The temperature control device is used to control the temperature of the die head and the film-threading roller to ensure the fluidity of the melt and the quality of the film. The humidity control device is used to maintain the humidity of the equipment operating environment to prevent the generation of static electricity. The voltage control device is used to provide the voltage required for the electrostatic field to achieve electrostatic attachment. The spacing control device is used to control the distance between the die head and the film-threading roller to ensure the uniform thickness of the film. The separation electrode box is used to generate an electrostatic field to make the film fit tightly with the cooling roller. The electrostatic wire is used to generate static electricity to help the film adsorb on the cooling roller. The Y-axis brake motor is used to control the movement and positioning of the equipment in the Y-axis direction. The X-axis stepper motor is used to control the precise movement of the equipment in the X-axis direction. The X-axis sensor is used to detect the position and movement in the X-axis direction. The Y-axis sensor is used to detect the position and movement in the Y-axis direction. The polyphenylene sulfide melt flow process: First, the polyphenylene sulfide melt is transported from the extruder to the die head through a pipeline to form a film. Then, after the film comes out of the die head, it directly contacts the film-threading roller for preliminary cooling and shaping. Then. The electrostatic wire generates static electricity, which causes the film to be adsorbed on the film-threading roller. Finally, the film is guided to the first auxiliary winder through the film-threading roller for winding. For example, the die head can be: an extrusion die head, a blow molding die head. The film-threading roller can be: a cooling roller, a calendering roller. The first auxiliary winder can be: a tension-controlled winder, a synchronous winder. The temperature control device can be: a temperature sensor, a temperature controller. The humidity control device can be: a humidity sensor, a humidity controller. The voltage control device can be: a transformer, a voltage stabilizer. The spacing control device can be: a stepper motor, a servo motor. The separation electrode box can be: an electrostatic electrode box, a separation electrode box. The electrostatic wire can be: a static elimination rod, a static induction wire. The Y-axis brake motor can be: a servo motor. The X-axis stepper motor can be: a high-precision stepper motor. The X-axis sensor can be: a photoelectric encoder. The Y-axis sensor can be: a laser rangefinder.
[0038] In practice, the execution subject may input the polyphenylene sulfide melt into an electrostatic attachment device for electrostatic attachment treatment by the following steps:
[0039] The first step is to control the temperature control device to set the temperature of the electrostatic attachment device within the range of 200-250°C.
[0040] The second step is to control the humidity control device to set the humidity to 80%.
[0041] The third step is to control the voltage control device to set the voltage of the electrostatic wire within the range of 0.8-1.2KV.
[0042] The fourth step is to input the polyphenylene sulfide melt into the die head, control the electrostatic wire to perform electrostatic attachment treatment, and obtain an initial electrostatic attachment casting sheet.
[0043] The fifth step is to control the spacing control device to set the spacing between the electrostatic wire and the initial electrostatically attached casting sheet within a range of 1-2 mm.
[0044] The sixth step is to control the spacing control device to set the spacing between the die head and the sheet-threading roller within a range of 2-3 mm.
[0045] In the seventh step, the initial electrostatically attached casting sheet is input into the first auxiliary winding machine for winding treatment to obtain the electrostatically attached casting sheet.
[0046] Step 103 , input the electrostatically attached casting sheet into an online thickness detection device for online thickness uniformity adjustment processing to obtain a uniform polyphenylene sulfide sheet.
[0047] In some embodiments, the execution entity may input the electrostatically attached casting sheet into an online thickness detection device for online thickness uniformity adjustment processing to obtain a uniform polyphenylene sulfide sheet.
[0048] Among them, the above-mentioned online thickness detection device includes: a thickness gauge, a die head, a control system, and an auxiliary winder. The thickness gauge is connected to the die head, the control system, and the auxiliary winder respectively. The functions of each component in the online thickness detection device: the thickness gauge is used to measure the thickness of the polyphenylene sulfide sheet in real time. The die head is used in the extrusion process, and the die head is responsible for forming the preliminary shape of the polyphenylene sulfide melt. The control system is used to receive data from the thickness gauge and compare and process according to the preset thickness standard. The auxiliary winder is used to wind the polyphenylene sulfide sheet into a roll after the thickness is detected and adjusted. Electrostatically attached casting sheet circulation process: First, the electrostatically attached casting sheet is processed into a preset shape in the die head. Secondly, after the electrostatically attached casting sheet passes through the die head, the thickness gauge measures the thickness of the electrostatically attached casting sheet in real time to ensure that it is within the range of 80-350μm. Then, the thickness gauge transmits the measured data to the control system. The control system calculates and adjusts according to the data of the thickness gauge to change the temperature of the die head to keep the material thickness within a predetermined range. Then, the thickness gauge also monitors the material thickness on the auxiliary winder. Finally, the thickness gauge will repeat multiple measurements and calculations to ensure that the thickness error range is within the range of 3%-8%. For example, the thickness gauge can be: electromagnetic thickness gauge, optical thickness gauge. The die head can be: extrusion die head, blow molding die head. The control system can be: programmable logic control system, distributed control system. The auxiliary winder can be: automatic tension winder, adjustable tension winder.
[0049] In practice, the execution subject may input the electrostatically attached casting sheet into an online thickness detection device for online thickness uniformity adjustment processing through the following steps:
[0050] In the first step, the thickness gauge is controlled to set the scanning speed within the range of 1-20 cm / s, the measuring range within the range of 80-350 um, and the error range within the range of 3%-8%.
[0051] The second step is to rotate and adjust the die head to adjust the thickness of the electrostatically attached casting sheet to obtain a uniform polyphenylene sulfide sheet.
[0052] Further references Figure 4 , Figure 4 Figure 4 It is a schematic screenshot of an internal test of the online monitoring page of the online thickness uniform adjustment disclosed in the present invention, which can illustrate the online monitoring method of the online thickness detection device.
[0053] Step 104 , inputting the uniform polyphenylene sulfide sheet into a longitudinal stretching device for longitudinal stretching treatment to obtain a high-fluidity polyphenylene sulfide sheet.
[0054] In some embodiments, the execution entity may input the uniform polyphenylene sulfide sheet into a longitudinal stretching device for longitudinal stretching to obtain a high-fluidity polyphenylene sulfide sheet.
[0055] The longitudinal stretching device comprises: a thickness gauge, a longitudinal stretching machine, a pressure roller, a winding device, and a preheating device. The thickness gauge is connected to the longitudinal stretching machine; the longitudinal stretching machine is connected to the pressure roller, the winding device, and the preheating device respectively. Functions of each component in the longitudinal stretching device: The thickness gauge is used to measure the thickness of the polyphenylene sulfide sheet in real time. The longitudinal stretching machine is used to apply longitudinal stretching force to the sheet to change its physical properties and improve its mechanical properties and transparency. The pressure roller is used to provide the necessary pressure to the sheet during the stretching process. The winding device is used to roll the longitudinally stretched sheet into a roll. The preheating device is used to heat the sheet to an appropriate temperature before stretching. Uniform polyphenylene sulfide sheet circulation process: First, the uniform polyphenylene sulfide sheet is fed into the longitudinal stretching device. Secondly, the uniform polyphenylene sulfide sheet is heated to a suitable stretching temperature by the preheating device. In the longitudinal stretching machine, the sheet is stretched to the designed thickness after preheating, and the thickness gauge monitors in real time and feeds back data to the control system. Then, the stretched sheet passes through the pressure roller. The shaped polyphenylene sulfide sheet is obtained. Finally, the shaped polyphenylene sulfide sheet is wound into a roll by a winding device. For example, the thickness gauge can be: an electromagnetic thickness gauge, an optical thickness gauge. The longitudinal stretching machine can be: a multi-roll stretching machine, a single-arm stretching machine. The pressure roller can be: a roller pressure roller, a high-temperature pressure roller. The winding device can be an electric winding device, an air expansion roller winding device. The preheating device can be: an infrared heater, a hot air preheater.
[0056] In practice, the execution entity may input the uniform polyphenylene sulfide sheet into a longitudinal stretching device for longitudinal stretching through the following steps:
[0057] In the first step, the preheating device is controlled to set the temperature of the longitudinal stretching device within the range of 70-90° C. and the preheating time within the range of 0.2-0.4 seconds.
[0058] The second step is to control the longitudinal stretching machine to set the stretching ratio within a preset ratio range, the stretching temperature within a range of 90-110° C., and the preheating time within a range of 0.1-0.2 seconds. The preset ratio range may be: 1:1-1:4.
[0059] The third step is to input the uniform polyphenylene sulfide sheet into a longitudinal stretching machine to obtain a longitudinal polyphenylene sulfide sheet.
[0060] The fourth step is to control the pressure roller to set the temperature within the range of 100-120° C. and the preheating time within the range of 0.2-0.4 seconds.
[0061] The fifth step is to input the longitudinal polyphenylene sulfide sheet into a pressing roller to obtain a shaped polyphenylene sulfide sheet.
[0062] The sixth step is to input the longitudinal polyphenylene sulfide sheet into a winding device to obtain a high-fluidity polyphenylene sulfide sheet.
[0063] The above-mentioned various embodiments of the present disclosure have the following beneficial effects: through the manufacturing method applied to high-fluidity polyphenylene sulfide sheets of some embodiments of the present disclosure, the thickness uniformity of the fluidity polyphenylene sulfide sheets can be improved. Specifically, the reason for the large thickness deviation of the high-fluidity polyphenylene sulfide sheets is that the pre-drying cannot guarantee the degradation of the polyphenylene sulfide melt during the plasticization process, and the polyphenylene sulfide melt has a long transition time from the molten state to the glass state. Based on this, the manufacturing method applied to high-fluidity polyphenylene sulfide sheets of some embodiments of the present disclosure, first, the polyphenylene sulfide raw material is added to an empty drying device for drying treatment to obtain a polyphenylene sulfide melt, wherein the drying device is connected to an electrostatic attachment device, the electrostatic attachment device is connected to an online thickness detection device, and the online thickness detection device is connected to a longitudinal stretching device. Thus, the uniformity and stability of the polyphenylene sulfide melt during the processing can be ensured. Secondly, the above-mentioned polyphenylene sulfide melt is input into the electrostatic attachment device for electrostatic attachment treatment to obtain an electrostatically attached casting. Thus, the quality of the electrostatic attachment process can be improved. Then, the electrostatically attached casting sheet is input into an online thickness detection device for online thickness uniformity adjustment to obtain a uniform polyphenylene sulfide sheet. Thus, precise thickness control can be achieved. Finally, the uniform polyphenylene sulfide sheet is input into a longitudinal stretching device for longitudinal stretching to obtain a high-fluidity polyphenylene sulfide sheet. Thus, by controlling the stress distribution during the longitudinal stretching process and ensuring that the sheet maintains uniform physical properties during the stretching process, the thickness uniformity of the high-fluidity polyphenylene sulfide sheet can be improved.
[0064] The above descriptions are only some preferred embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in the embodiments of the present disclosure (but not limited to) and the technical solutions formed.
Claims
1. A method for manufacturing a high-flow polyphenylene sulfide sheet, and a device for preparing a high-flow polyphenylene sulfide sheet. include: A drying device, an electrostatic attachment device, an online thickness detection device, and a longitudinal stretching device. The method comprises: Adding the polyphenylene sulfide raw material into an empty drying device for drying to obtain a polyphenylene sulfide melt, wherein the drying device is connected to an electrostatic attachment device, the electrostatic attachment device is connected to an online thickness detection device, and the online thickness detection device is connected to a longitudinal stretching device; The polyphenylene sulfide melt is input into an electrostatic attachment device for electrostatic attachment treatment to obtain an electrostatic attachment casting sheet; The electrostatically attached casting sheet is input into an online thickness detection device for online thickness uniformity adjustment processing to obtain a uniform polyphenylene sulfide sheet; The uniform polyphenylene sulfide sheet is input into a longitudinal stretching device for longitudinal stretching treatment to obtain a high-fluidity polyphenylene sulfide sheet.
2. The method for producing a high-fluidity polyphenylene sulfide sheet according to claim 1, in, The drying device comprises: a drying temperature control device, a drying silo, a metal separator, a first air volume regulating device, an extruder, a cyclone separator, a pulse dust collector, a second air volume regulating device, a first heat exchanger, a first cooling device, a second cooling device, a second heat exchanger, a dehumidification system, a dew point meter, and an alarm device, wherein the drying temperature control device is connected to the drying silo; the drying silo is respectively connected to the metal separator, the extruder, and the cyclone separator; the cyclone separator is connected to the pulse dust collector; the pulse dust collector is connected to the second air volume regulating device; the second air volume regulating device is connected to the first cooling device; the extruder is respectively connected to the first cooling device and the second cooling device; the first heat exchanger is respectively connected to the first cooling device and the dehumidification system; and the polyphenylene sulfide raw material is added to the emptied drying device for drying treatment to obtain a polyphenylene sulfide melt, including: Controlling the drying temperature control device to set the drying duration of the polyphenylene sulfide raw material in the drying silo within a preset duration interval; Controlling the drying temperature control device to raise the temperature of the polyphenylene sulfide raw material in the drying silo to a range of 140-170° C.; Controlling the dew point meter to set the dew point to -50°C; Controlling the first air volume regulating device to set the air volume to 500 cubic meters per hour; Adding the polyphenylene sulfide raw material into the drying silo for drying to obtain a dry polyphenylene sulfide raw material; The dried polyphenylene sulfide raw material is transported to the extruder for melting treatment to obtain a polyphenylene sulfide melt.
3. The method for producing a high-fluidity polyphenylene sulfide sheet according to claim 1, in, The electrostatic attachment device comprises: a die head, a film-threading roller, a first auxiliary winding machine, a temperature control device, a humidity control device, a voltage control device, a spacing control device, a separation electrode box, an electrostatic wire, a Y-axis brake motor, an X-axis stepper motor, an X-axis sensor, and a Y-axis sensor, wherein the die head is respectively connected to the film-threading roller and the temperature control device; the film-threading roller is respectively connected to the first auxiliary winding machine and the temperature control device; the voltage control device is connected to the electrostatic wire; the spacing control device is respectively connected to the electrostatic wire, the die head, and the film-threading roller; the Y-axis brake motor is connected to the Y-axis sensor; the X-axis stepper motor is connected to the X-axis sensor; the separation electrode box is respectively connected to the temperature control device, the humidity control device, the voltage control device, the spacing control device, the electrostatic wire, the Y-axis brake motor, the X-axis stepper motor, the X-axis sensor, and the Y-axis sensor.
4. The method for producing a high-fluidity polyphenylene sulfide sheet according to claim 1, in, The online thickness detection device comprises: a thickness gauge, a die head, a control system, and an auxiliary winder, wherein the thickness gauge is connected to the die head, the control system, and the auxiliary winder respectively.