A polylactic acid filament spinning temperature precision control device

Abstract

The utility model relates to poly lactic acid tow spinning temperature precision regulation and control equipment technical field, and disclose a kind of poly lactic acid tow spinning temperature precision regulation and control equipment, including screw extruder, the upper surface of screw extruder is equipped with feeding hopper, and the output end of screw extruder is equipped with extrusion head, and one end of extrusion head is equipped with cooling mechanism, and the cold end end of cooling mechanism is arranged at one end of extrusion head;The utility model reaches the temperature of cooling water that can be accurately controlled to tow cooling by the setting of cooling mechanism.

Description

Technical Field

[0001] This utility model relates to the technical field of polylactic acid (PLA) filament spinning temperature precision control equipment, specifically a PLA filament spinning temperature precision control equipment. Background Technology

[0002] Polylactic acid (PLA) is a novel biodegradable polymer material with good biocompatibility, mechanical properties, and processing performance. It has broad application prospects in many fields such as medical, packaging, and textile. In the textile field, PLA fiber has received increasing attention due to its natural skin-friendly and environmentally friendly properties. The spinning process of PLA requires precise temperature control.

[0003] Traditional screw extruders typically use a fixed flow rate of cold water to cool polylactic acid (PLA) filaments during spinning. Since the filaments enter the cold water at a high temperature, the water temperature gradually rises after prolonged use, affecting the cooling effect on the filaments and consequently impacting product quality. Temperature control is also relatively inaccurate. Utility Model Content

[0004] The purpose of this invention is to provide a precise temperature control device for polylactic acid (PLA) filament spinning. This device addresses the problem that traditional screw extruders typically use a fixed flow rate of cold water to cool the PLA filaments during spinning. Since the filaments enter the cold water at a high temperature, the water temperature gradually increases after prolonged use, affecting the cooling effect on the filaments and consequently impacting product quality.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a precise temperature control device for polylactic acid filament spinning, comprising a screw extruder, a feeding hopper mounted on the upper surface of the screw extruder, an extrusion head mounted on the output end of the screw extruder, a cooling mechanism provided at one end of the extrusion head, and the cold end of the cooling mechanism being located at one end of the extrusion head.

[0007] Furthermore, the cooling mechanism includes a cooling box, which is located at one end of the extruder. Two sets of brackets are fixedly installed on the lower surface of the cooling box, and a water storage box is fixedly installed between the two sets of brackets. Several refrigeration pipes are installed inside the water storage box.

[0008] Furthermore, each cooling box is rotatably connected to a guide roller, and a temperature sensor is installed inside the cooling box.

[0009] Furthermore, a mounting plate is fixedly installed on one side of the cooling box, and a circulation pump is fixedly installed on the upper surface of the mounting plate. A water pumping pipe is installed at the input end of the circulation pump.

[0010] Furthermore, a water outlet pipe is installed at the output end of the circulation pump.

[0011] Furthermore, a diversion pipe is fixedly installed inside the cooling box, which is connected to the water outlet pipe, and several sets of nozzles are fixedly installed on one side of the diversion pipe.

[0012] This utility model has the following beneficial effects:

[0013] (1) When the polylactic acid filament bundle is extruded from the extruder and enters the cooling box of the cooling mechanism, the temperature sensor inside the cooling box starts to work and monitors the temperature inside the cooling box in real time. The cooling pipe in the water storage box continues to cool, keeping the water in the water storage box at a low temperature. The circulation pump starts and draws water from the water storage box through the water pumping pipe. Then the water is transported to the distribution pipe through the water outlet pipe and sprayed out by several sets of nozzles on one side of the distribution pipe. The sprayed low temperature water forms a low temperature environment inside the cooling box. When the polylactic acid filament bundle passes through the wire roller inside the cooling box, it comes into full contact with the low temperature environment and achieves cooling. The water inside the cooling box will directly enter the interior of the water storage box from the drain outlet of the cooling box. Then the circulation pump continuously circulates and pumps water to maintain the temperature inside the cooling box. At the same time, the temperature sensor feeds back the monitored temperature signal to the control system. The control system adjusts the cooling power of the cooling pipe or the pumping speed of the circulation pump according to the feedback signal to achieve precise control of the temperature of the cooling water for cooling the filament bundle.

[0014] (2) The cooling box of this utility model is equipped with multiple nozzles, which can form a uniform low temperature environment in the cooling box. At the same time, the polylactic acid filament bundle is fully contacted with the low temperature environment through the guide roller, which improves the cooling efficiency and is conducive to improving production efficiency.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the above advantages at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present utility model. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the overall structure of the present utility model. Figure 2 ;

[0019] Figure 3 This is a schematic cross-sectional view of the cooling mechanism structure of this utility model;

[0020] Figure 4 This utility model Figure 1 Enlarged schematic diagram of structure A in the image;

[0021] The attached diagram lists the components represented by each number as follows:

[0022] In the diagram: 1. Screw extruder; 2. Feed hopper; 3. Extrusion head; 4. Cooling mechanism; 401. Cooling box; 402. Support; 403. Water storage box; 404. Refrigeration pipe; 405. Guide roller; 406. Temperature sensor; 407. Mounting plate; 408. Circulation pump; 409. Water suction pipe; 410. Water outlet pipe; 411. Diverter pipe; 412. Nozzle. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-4 As shown, this utility model is a precise temperature control device for polylactic acid tow spinning, including a screw extruder 1, a feeding hopper 2 installed on the upper surface of the screw extruder 1, an extrusion head 3 installed at the output end of the screw extruder 1, a cooling mechanism 4 provided at one end of the extrusion head 3, and the cold end of the cooling mechanism 4 being located at one end of the extrusion head 3.

[0025] Polylactic acid (PLA) raw material is fed into screw extruder 1 through hopper 2. Screw extruder 1 heats, pressurizes, and conveys the raw material, extruding it from extrusion head 3. During this process, the heating system of screw extruder 1 sets a certain temperature according to the characteristics of PLA to keep PLA in a suitable molten state for extrusion. The extruded material is then extruded into filaments and enters the cooling mechanism 4.

[0026] The cooling mechanism 4 includes a cooling box 401, which is located at one end of the extruder 3. Two sets of brackets 402 are fixedly installed on the lower surface of the cooling box 401. A water storage box 403 is fixedly installed between the two sets of brackets 402. Several cooling pipes 404 are installed inside the water storage box 403.

[0027] The interior of the cooling box 401 is rotatably connected to guide rollers 405, and the interior of the cooling box 401 is equipped with temperature sensors 406;

[0028] The temperature sensor is a PT100 temperature sensor.

[0029] A mounting plate 407 is fixedly installed on one side of the cooling box 401. A circulation pump 408 is fixedly installed on the upper surface of the mounting plate 407. A water pumping pipe 409 is installed at the input end of the circulation pump 408.

[0030] The output end of the circulating pump 408 is equipped with a water outlet pipe 410;

[0031] A diversion pipe 411 is fixedly installed inside the cooling box 401. The diversion pipe 411 is connected to the water outlet pipe 410. Several sets of nozzles 412 are fixedly installed on one side of the diversion pipe 411.

[0032] When the polylactic acid (PLA) filaments are extruded from the extruder 3 into the cooling box 401 of the cooling mechanism 4, the temperature sensor 406 inside the cooling box 401 starts working, monitoring the temperature inside the cooling box 401 in real time. The cooling pipe 404 in the water storage box 403 continuously cools the water, keeping the water in the water storage box 403 at a low temperature. The circulation pump 408 starts, drawing water from the water storage box 403 through the water pumping pipe 409, and then delivering the water to the distribution pipe 411 through the water outlet pipe 410. The water is then sprayed out by several sets of nozzles 412 on one side of the distribution pipe 411. The sprayed low-temperature water creates a low-temperature environment inside the cooling box 401, allowing the PLA filaments to cool down. When the wire roller 405 inside the cooling box 401 comes into full contact with the low-temperature environment, it achieves cooling. The water inside the cooling box 401 flows directly into the water storage box 403 from the drain port of the cooling box 401. Then, the circulation pump 408 continuously circulates and pumps water to maintain a stable temperature inside the cooling box 401. At the same time, the temperature sensor 406 feeds back the monitored temperature signal to the control system. The control system adjusts parameters such as the cooling power of the cooling pipe 404 or the pumping speed of the circulation pump 408 according to the feedback signal, thereby precisely controlling the temperature inside the cooling box 401 and achieving precise control of the temperature of the cooling water for cooling the wire bundle.

[0033] In use, polylactic acid raw material is first added to screw extruder 1 through feeding hopper 2. Screw extruder 1 heats, pressurizes and conveys the raw material, and extrudes the raw material from extrusion head 3. During this process, the heating system of screw extruder 1 will set a certain temperature according to the characteristics of polylactic acid, so that polylactic acid is in a suitable molten state for extrusion. The extruded material is in the form of filaments and then enters the interior of cooling mechanism 4.

[0034] When the polylactic acid (PLA) filaments are extruded from the extruder 3 into the cooling box 401 of the cooling mechanism 4, the temperature sensor 406 inside the cooling box 401 starts working, monitoring the temperature inside the cooling box 401 in real time. The cooling pipe 404 in the water storage box 403 continuously cools the water, keeping the water in the water storage box 403 at a low temperature. The circulation pump 408 starts, drawing water from the water storage box 403 through the water pumping pipe 409, and then delivering the water to the distribution pipe 411 through the water outlet pipe 410. The water is then sprayed out by several sets of nozzles 412 on one side of the distribution pipe 411, and the sprayed low-temperature water forms a low-temperature ring inside the cooling box 401. In the cooling box 401, the polylactic acid filament bundles come into full contact with the low-temperature environment as they pass through the guide roller 405, achieving cooling. The water inside the cooling box 401 flows directly into the water storage box 403 through the drain port of the cooling box 401. Then, the circulation pump 408 continuously circulates and sprays water to maintain a stable temperature inside the cooling box 401. At the same time, the temperature sensor 406 feeds back the monitored temperature signal to the control system. The control system adjusts parameters such as the cooling power of the cooling pipe 404 or the pumping speed of the circulation pump 408 according to the feedback signal, thereby precisely controlling the temperature inside the cooling box 401.

[0035] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A polylactic acid tow spinning temperature precision control device, comprising a screw extruder (1), wherein a feeding hopper (2) is installed on the upper surface of the screw extruder (1), and an extrusion head (3) is installed at the output end of the screw extruder (1), characterized in that: The extruder (3) is provided with a cooling mechanism (4) at one end, and the cold end of the cooling mechanism (4) is located at one end of the extruder (3).

2. The polylactic acid tow spinning temperature precision control device according to claim 1, characterized in that: The cooling mechanism (4) includes a cooling box (401), which is located at one end of the extruder (3). Two sets of brackets (402) are fixedly installed on the lower surface of the cooling box (401), and a water storage box (403) is fixedly installed between the two sets of brackets (402). Several cooling pipes (404) are installed inside the water storage box (403).

3. The polylactic acid tow spinning temperature precision control device according to claim 2, characterized in that: Each cooling box (401) is rotatably connected to a guide roller (405), and a temperature sensor (406) is installed inside the cooling box (401).

4. The polylactic acid tow spinning temperature precision control device according to claim 3, characterized in that: A mounting plate (407) is fixedly installed on one side of the cooling box (401), and a circulation pump (408) is fixedly installed on the upper surface of the mounting plate (407). A water pumping pipe (409) is installed at the input end of the circulation pump (408).

5. The polylactic acid tow spinning temperature precision control device according to claim 4, characterized in that: The output end of the circulating pump (408) is equipped with a water outlet pipe (410).

6. The polylactic acid tow spinning temperature precision control device according to claim 2, characterized in that: A diversion pipe (411) is fixedly installed inside the cooling box (401). The diversion pipe (411) is connected to the water outlet pipe (410). Several sets of nozzles (412) are fixedly installed on one side of the diversion pipe (411).

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