Container bag wire drawing equipment and wire drawing process

Abstract

The present invention discloses a bulk bag wire drawing device and a wire drawing process, and relates to the field of bulk bag wire drawing technology. The present invention comprises a cooling box, wherein a first outer roller and a second outer roller are fixedly installed on the right side of the cooling box, a film inlet is provided at the lower part of the right side of the cooling box, a film outlet is provided at the upper part of the left side of the cooling box, a group of conveying rollers and three groups of inner guide rollers are rotatably installed inside the cooling box, four groups of spray rollers are rotatably installed inside the cooling box, and a plurality of groups of atomizing nozzles are provided in an annular manner on the outer side of the spray roller. The present invention drives the spray roller and the pressure component to rotate synchronously through the conveying roller by using a transmission component, and performs rotary double-sided spraying on the film, and the spray amount and the rotary spray speed change synchronously with the film moving speed, which greatly ensures the cooling uniformity, and at the same time adopts the spray cooling method, which saves more water resources, and only needs to control the temperature of the spray liquid to stably control the cooling temperature, and the cooling effect is good.

Description

Technical Field

[0001] The invention relates to the technical field of bulk bag wire drawing, and in particular to a bulk bag wire drawing device and a wire drawing process. Background Art

[0002] Container bags are a kind of flexible transport packaging container, which are widely used in the transportation and packaging of powdered, granular and blocky items such as food, grains, medicines, chemicals and minerals. Developed countries generally use container bags as packaging products for transportation and storage. Also known as flexible container bags, ton bags, space bags, etc., it is a kind of container unit equipment. With a crane or forklift, it can realize containerized transportation. It is suitable for transporting bulk powdery and granular materials.

[0003] The wire drawing process of container bags is an important step in converting plastic resin into film and finally forming a container bag. The film needs to be cooled and shaped. The commonly used cooling method is: the film is quickly cooled in a cooling water bath to stabilize it. Water bath cooling not only wastes a lot of water resources, but also the water bath temperature may change due to external environmental factors (such as air temperature and humidity), resulting in unstable cooling effect. In the document (application number: CN202021354728.1), a container bag wire drawing device is disclosed. The device is also a sampling water bath cooling. The device can monitor the water temperature in the water tank through multiple sets of temperature monitoring probes, and cooperate with the coil and the atomizing nozzle to adjust the water temperature of the water tank. However, its spray temperature adjustment cannot keep the water temperature in the water tank consistent. When adjusting the temperature, its surface temperature is higher than the temperature below, resulting in uneven cooling rate of the film, thereby affecting the internal stress of the film. At the same time, the water bath cooling is a straight line through the water tank. In order to ensure sufficient cooling time, the cooling equipment needs to be set at a long distance, and the equipment occupies a large space. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems and provide a bulk bag wire drawing device and a wire drawing process.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0006] A container bag wire drawing equipment, comprising a cooling box, a first outer roller and a second outer roller are fixedly installed on the right side of the cooling box, the first outer roller is located above the second outer roller, a film inlet is opened at the lower part of the right side of the cooling box, and the film enters the film inlet horizontally through the second outer roller, and a film outlet is opened at the upper part of the left side of the cooling box, a group of conveying rollers and three groups of inner guide rollers are rotatably installed inside the cooling box, the conveying rollers and a group of inner guide rollers are located at the lower part of the left side, and the other two groups of inner guide rollers are located at the upper part of the right side, the conveying rollers are driven by a motor, and the film is S-shaped after passing through a group of conveying rollers and three groups of inner guide rollers, four groups of spray rollers are rotatably installed inside the cooling box, and two of them are distributed between the S-shaped films, and multiple groups of atomizing nozzles are annularly arranged on the outer side of the spray roller;

[0007] Four groups of exhaust ports are provided on the front of the cooling box, and exhaust fans are rotatably installed inside the exhaust ports. A wind shield is provided on the inner wall of the cooling box, and the wind shield shield blocks the exhaust ports. Air ports are provided on the top and left sides of the wind shield. A pressurizing assembly and a transmission assembly are fixedly installed on the back of the cooling box. The motor can drive the pressurizing assembly to operate through the transmission assembly, and the motor can drive the four groups of spray rollers to rotate through the transmission assembly. The pressurizing assembly is connected to the four groups of spray rollers through a water outlet pipe.

[0008] Furthermore, the pressurizing component includes a pressurizing pipe, a spiral pressurizing rod is rotatably installed inside the pressurizing pipe, a water inlet pipe is arranged on the right side of the pressurizing pipe, and the pressurizing pipe is connected to the four groups of spray rollers through a water outlet pipe.

[0009] Furthermore, the transmission assembly includes a transmission box fixedly mounted on the back of the cooling box, four sets of transmission wheels are rotatably mounted inside the transmission box, the four sets of transmission wheels are connected through transmission toothed belts, the four sets of transmission wheels are respectively connected to four sets of spray rollers, and a driven pulley is fixedly mounted on the outer side of the lower left transmission wheel;

[0010] A transmission shaft is arranged between the motor and the conveying roller, a driving pulley and a driving bevel gear are fixedly installed on the outer side of the transmission shaft, the driving pulley and the driven pulley are connected through a transmission belt, a driven bevel gear is fixedly installed on the left side of the spiral pressure rod, and the driven bevel gear is meshed with the driving bevel gear.

[0011] Furthermore, a rotary sealing joint is fixedly installed on the outer side of the transmission wheel, and the rotary sealing joint is connected to the water outlet pipe.

[0012] Furthermore, a condensation plate is obliquely arranged inside the air outlet.

[0013] Furthermore, the inner bottom of the wind shield is designed to be inclined toward the middle, and a drainage pipe is provided at the center of the inner bottom of the wind shield.

[0014] Furthermore, the atomizing nozzles on adjacent spray rollers are staggered in design.

[0015] Furthermore, a driven wheel is fixedly installed on the inner side of the exhaust fan, and a driving wheel is rotatably installed on the inner wall of the cooling box. The driving wheel is meshed with the driven wheel. The radius of the driving wheel is larger than the radius of the driven wheel. The driving wheel is fixedly connected to the spray roller through a rotating shaft, and the rotating shaft passes through the wind shield.

[0016] Furthermore, a fan-shaped through hole is provided inside the driving wheel.

[0017] A container bag wire drawing process comprises the following steps:

[0018] S1. Extrusion molding: Put the raw material particles into the extruder, heat them to melt them, and form a uniform molten plastic. The molten plastic is extruded through the die head to form a continuous film;

[0019] S2, wire drawing cooling: The extruded film is initially stretched by mechanical stretching, and the stretching ratio needs to be determined according to the material properties. Then the film passes through the first outer roller and the second outer roller into the cooling box, and four sets of spray rollers are used for double-sided spray cooling to quickly reduce the temperature and solidify the material;

[0020] S3, cutting and winding: using an automatic cutting machine, the cooled plastic wire is cut into required lengths, and the cut plastic wire is wound into coils;

[0021] S4. Post-processing: Check the quality of the finished products, including thickness, strength, appearance, etc., to ensure that they meet the standards, and package the qualified container bags.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. The present invention uses a transmission component to drive the spray roller and the pressure component to rotate synchronously through a conveying roller, and performs rotary double-sided spraying on the film. The spray volume and the rotary spray speed change synchronously with the film moving speed, which greatly ensures the cooling uniformity. At the same time, the spray cooling method is adopted to save more water resources. Only the temperature of the spray liquid needs to be controlled to stably control the cooling temperature, and the cooling effect is good.

[0024] 2. The present invention arranges conveying rollers and inner guide rollers to make the film pass through the cooling box in an S shape from bottom to top, which can increase the residence time of the film in the cooling box and thus reduce the volume of the cooling box. Then, through the design of four groups of spray rollers, the lower two groups of spray rollers spray the upper surface of the film, and the upper two groups of spray rollers spray the lower surface of the film. After cooling, the surface of the film will not be stained with water droplets, will not affect subsequent processing, and the cooling quality is high.

[0025] 3. The present invention can discharge excess moisture in the cooling box through the setting of the exhaust fan, ensure the stability of the temperature inside the cooling box, and improve the cooling effect. Then, by setting the wind shield, the air outlet is located at the film outlet, and the discharge of moisture will not affect the spray cooling, and can further ensure that no water droplets will remain on the surface of the film after cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ;

[0027] Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ;

[0028] Figure 3 The invention explodes Figure 1 ;

[0029] Figure 4 The invention explodes Figure 2 ;

[0030] Figure 5 It is a schematic diagram of the internal structure of the cooling box of the present invention;

[0031] Figure 6 It is a schematic diagram of the structure of the transmission assembly of the present invention;

[0032] Figure 7 It is a schematic diagram of the internal structure of the exhaust port of the present invention.

[0033] : 1. cooling box; 11. first outer roller; 12. second outer roller; 13. film inlet; 14. film outlet; 15. exhaust port; 16. exhaust fan; 17. driven wheel; 18. driving wheel; 2. conveying roller; 3. inner guide roller; 4. spray roller; 5. atomizing nozzle; 6. wind shield; 61. condensation plate; 62. drain pipe; 7. pressure pipe; 71. spiral pressure rod; 72. water inlet pipe; 73. water outlet pipe; 8. transmission assembly; 81. transmission box; 82. transmission wheel; 83. transmission toothed belt; 84. rotary sealing joint; 85. driven pulley; 86. driving pulley; 87. driving bevel gear; 88. driven bevel gear. DETAILED DESCRIPTION

[0034] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Embodiment 1

[0035] like Figure 1-Figure 7As shown, a container bag wire drawing equipment comprises a cooling box 1, a first outer roller 11 and a second outer roller 12 are fixedly installed on the right side of the cooling box 1, the first outer roller 11 is located above the second outer roller 12, a film inlet 13 is opened at the lower part of the right side of the cooling box 1, and the film enters the film inlet 13 horizontally through the second outer roller 12, and a film outlet 14 is opened at the upper part of the left side of the cooling box 1, a group of conveying rollers 2 and three groups of inner guide rollers 3 are rotatably installed inside the cooling box 1, the conveying rollers 2 and a group of inner guide rollers 3 are located at the lower part of the left side, and the other two groups of inner guide rollers 3 are located at the upper part of the right side, the conveying rollers 2 are driven by a motor, and the film is S-shaped after passing through a group of conveying rollers 2 and the three groups of inner guide rollers 3, four groups of spray rollers 4 are rotatably installed inside the cooling box 1, and two of them are distributed between the S-shaped films, and multiple groups of atomizing nozzles 5 are annularly arranged on the outer side of the spray roller 4;

[0036] Four groups of exhaust ports 15 are provided on the front of the cooling box 1, and exhaust fans 16 are rotatably installed inside the exhaust ports 15. A wind shield 6 is provided on the inner wall of the cooling box 1, and the wind shield 6 shields the exhaust ports 15. Air ports are provided on the top and left sides of the wind shield 6. A pressurizing assembly and a transmission assembly 8 are fixedly installed on the back of the cooling box 1. The motor can drive the pressurizing assembly to operate through the transmission assembly 8, and the motor can drive the four groups of spray rollers 4 to rotate through the transmission assembly 8. The pressurizing assembly is connected to the four groups of spray rollers 4 through the water outlet pipe 73.

[0037] When in use, the film changes direction through the first outer roller 11 and the second outer roller 12, then enters the cooling box 1 horizontally through the film inlet 13, then passes through the conveying roller 2 and moves vertically upward, then passes through the inner guide roller 3 on the left to become horizontal, then passes through the inner guide roller 3 at the bottom of the right to become vertical again, and finally passes through the inner guide roller 3 at the top of the right to become horizontal, and comes out horizontally through the film outlet 14. Through this design, the film feed and discharge are at the same height, and are located at the bottom when entering the cooling box 1 and at the top after moving out of the cooling box 1. The film is S-shaped in the cooling box 1. When cooling, cooling water of a certain temperature is added. The pressure assembly and the water outlet pipe 73 enter the spray roller 4, and then the water is sprayed on the surface of the film in a mist form through the atomizing nozzle 5 to cool the film. At the same time, the motor drives the conveying roller 2 to rotate, and the conveying roller 2 moves the film. The motor drives the spray roller 4 to rotate synchronously through the transmission assembly 8. The spray roller 4 rotates to spray, and the spray is more uniform, which is not easy to damage the film. The spray surface of the two groups of spray rollers 4 below is the upper surface of the film. After the spray, the upper surface of the film will pass through the right vertical section, and the water droplets that may remain on its surface will roll off. The spray surface of the two groups of spray rollers 4 above is the lower surface of the film, and the lower surface is not easy to leave water droplets.

[0038] Since the present invention adopts double-sided rotary spray cooling, a large amount of water mist will be sprayed into the cooling box 1 in the actual process, which may easily lead to excessive humidity inside the cooling box 1 and affect the cooling quality. Therefore, the exhaust fan 16 is provided to reduce the moisture in the cooling box 1, and the wind shield 6 is provided to make the air outlet face the top and the left inner wall of the cooling box 1, and not directly face the spray roller 4, which does not affect the spraying. The film after spray cooling will pass through the air outlet on the left side of the wind shield 6, further eliminating the water droplets on its surface and further improving the cooling effect.

[0039] In the actual processing, the conveying speed of the film needs to be changed according to the processing requirements. If the conveying speed is too fast and the spray amount remains unchanged, insufficient cooling may occur. Therefore, the present invention sets the transmission component 8 so that the power of the pressure component increases with the increase in the rotation speed of the conveying roller 2 to ensure that the spray amount is sufficiently cooled. The increase in the spray amount will lead to an increase in the spray pressure. The distance between the atomizing nozzle 5 and the film is fixed. If the rotation speed is not increased, the force on the surface of the film will increase. Therefore, the transmission component 8 is set to increase the rotation speed of the spray roller 4 with the increase in the rotation speed of the conveying roller 2. The increase in the rotation speed of the spray roller 4 will reduce the contact time between the water mist sprayed by the single group of atomizing nozzles 5 and the film, but increase the contact frequency. Therefore, the cooling effect will not be affected while reducing the force. There is no need to adjust the cooling effect of the cooling box 1 separately, and the operation is convenient. Embodiment 2

[0040] Based on the above embodiments, a pressurizing component structure is provided;

[0041] like Figure 6 As shown, the pressurizing assembly includes a pressurizing pipe 7, a spiral pressurizing rod 71 is rotatably installed inside the pressurizing pipe 7, a water inlet pipe 72 is arranged on the right side of the pressurizing pipe 7, and the pressurizing pipe 7 is connected to the four groups of spray rollers 4 through a water outlet pipe 73.

[0042] Through the setting of spiral pressurization, compared with traditional water pumps, spiral conveying usually consumes less energy when increasing water pressure, and is more suitable for use in the pressurized environment of the present invention. In addition, the structure of the screw conveyor is relatively simple, and maintenance and cleaning are relatively convenient, which reduces maintenance costs. Embodiment 3

[0043] Based on the above embodiment, a transmission assembly 8 structure is provided;

[0044] like Figure 6 As shown, the transmission assembly 8 includes a transmission box 81 fixedly mounted on the back of the cooling box 1, and four sets of transmission wheels 82 are rotatably mounted inside the transmission box 81. The four sets of transmission wheels 82 are connected through transmission toothed belts 83. The four sets of transmission wheels 82 are respectively connected to the four sets of spray rollers 4. A driven pulley 85 is fixedly mounted on the outer side of the left lower transmission wheel 82.

[0045] A transmission shaft is arranged between the motor and the conveying roller 2, and a driving pulley 86 and a driving bevel gear 87 are fixedly installed on the outer side of the transmission shaft. The driving pulley 86 and the driven pulley 85 are connected through a transmission belt. A driven bevel gear 88 is fixedly installed on the left side of the spiral pressure rod 71, and the driven bevel gear 88 is meshed with the driving bevel gear 87.

[0046] Furthermore, a rotary sealing joint 84 is fixedly installed on the outer side of the driving wheel 82 , and the rotary sealing joint 84 is connected to the water outlet pipe 73 .

[0047] The motor drives the conveying roller 2, the driving pulley 86 and the driving bevel gear 87 to rotate through the transmission shaft. The driving pulley 86 drives the driven pulley 85 to rotate through the transmission belt. The driven pulley 85 drives the lower left transmission wheel 82 to rotate. The lower left transmission wheel 82 drives the other three groups of transmission wheels 82 to rotate synchronously through the transmission toothed belt 83. The four groups of transmission wheels 82 drive the four groups of spray rollers 4 to rotate synchronously. At the same time, the driving bevel gear 87 drives the driven bevel gear 88 to rotate. The driven bevel gear 88 drives the spiral pressure rod 71 to rotate, and the spiral pressure rod 71 pressurizes the cooling water. Embodiment 4

[0048] On the basis of the above embodiment, a condensation plate 61 is further provided obliquely inside the air outlet.

[0049] Furthermore, the inner bottom of the wind shield 6 is designed to be inclined toward the middle, and a drainage pipe 62 is provided at the center of the inner bottom of the wind shield 6 .

[0050] By setting the condensation plate 61, water in the humid air condenses on the condensation plate 61. The condensed water droplets slide to the bottom of the wind shield 6 under the guidance of the inclined condensation plate 61, and then are discharged through the drain pipe 62. The discharged water can be collected and reused, saving cooling water. Embodiment 5

[0051] On the basis of the above embodiment, the atomizing nozzles 5 on adjacent spray rollers 4 are also included in a staggered design. Through this design, the occurrence of spray dead corners can be effectively prevented. Embodiment 6

[0052] On the basis of the above embodiment, it also includes that a driven wheel 17 is fixedly installed on the inner side of the exhaust fan 16, and a driving wheel 18 is rotatably installed on the inner wall of the cooling box 1, the driving wheel 18 is meshed with the driven wheel 17, the radius of the driving wheel 18 is larger than the radius of the driven wheel 17, the driving wheel 18 is fixedly connected to the spray roller 4 through a rotating shaft, and the rotating shaft passes through the wind shield 6.

[0053] Furthermore, a fan-shaped through hole is opened inside the driving wheel 18. Through this design, when the radius of the driving wheel 18 is set larger, the exhaust port 15 is less blocked, thereby reducing the influence of the driving wheel 18 on moisture removal.

[0054] The spray roller 4 drives the driving wheel 18 to rotate through the rotating shaft, the driving wheel 18 drives the driven wheel 17 to rotate, and the driven wheel 17 drives the exhaust fan 16 to rotate. Since the radius of the driving wheel 18 is larger than the radius of the driven wheel 17, the speed of the exhaust fan 16 will be much higher than the speed of the spray roller 4, ensuring the dehumidification effect. Embodiment 7

[0055] A container bag wire drawing process comprises the following steps:

[0056] S1. Extrusion molding: Put the raw material particles into the extruder, heat them to melt them, and form a uniform molten plastic. The molten plastic is extruded through the die head to form a continuous film;

[0057] S2, wire drawing cooling: the extruded film is initially stretched by mechanical stretching, and the stretching ratio needs to be determined according to the material properties. Then the film passes through the first outer roller 11 and the second outer roller 12 into the cooling box 1, and four groups of spray rollers 4 are used for double-sided spray cooling to quickly reduce the temperature and solidify the material;

[0058] S3, cutting and winding: using an automatic cutting machine, the cooled plastic wire is cut into required lengths, and the cut plastic wire is wound into coils;

[0059] S4. Post-processing: Check the quality of the finished products, including thickness, strength, appearance, etc., to ensure that they meet the standards, and package the qualified container bags.

[0060] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A container bag wire drawing device, comprising a cooling box (1), characterized in that: A first outer roller (11) and a second outer roller (12) are fixedly mounted on the right side of the cooling box (1), the first outer roller (11) being located above the second outer roller (12), a film inlet (13) being provided at the lower portion of the right side of the cooling box (1), the film horizontally entering the film inlet (13) through the second outer roller (12), a film outlet (14) being provided at the upper portion of the left side of the cooling box (1), a group of conveying rollers (2) and three groups of inner guide rollers (3) being rotatably mounted inside the cooling box (1), the conveying rollers (2) and a group of inner guide rollers (3) being located at the lower portion of the left side, and the other two groups of inner guide rollers (3) being located at the upper portion of the right side, the conveying rollers (2) being driven by a motor, the film being in an S shape after passing through a group of conveying rollers (2) and the three groups of inner guide rollers (3), four groups of spray rollers (4) being rotatably mounted inside the cooling box (1), and being distributed in pairs between the S-shaped films, a plurality of groups of atomizing nozzles (5) being provided in an annular manner on the outer side of the spray rollers (4); The front of the cooling box (1) is provided with four groups of exhaust ports (15), and an exhaust fan (16) is rotatably installed inside the exhaust port (15). A wind shield (6) is provided on the inner wall of the cooling box (1), and the wind shield (6) shields the exhaust port (15). Air ports are provided on the top and left side of the wind shield (6). A pressurizing component and a transmission component (8) are fixedly installed on the back of the cooling box (1). The motor can drive the pressurizing component to operate through the transmission component (8), and the motor can drive the four groups of spray rollers (4) to rotate through the transmission component (8). The pressurizing component is connected to the four groups of spray rollers (4) through a water outlet pipe (73).

2. The container bag wire drawing equipment according to claim 1, characterized in that: The pressurizing assembly comprises a pressurizing pipe (7), a spiral pressurizing rod (71) is rotatably mounted inside the pressurizing pipe (7), a water inlet pipe (72) is arranged on the right side of the pressurizing pipe (7), and the pressurizing pipe (7) is connected to the four groups of spray rollers (4) via a water outlet pipe (73).

3. The container bag wire drawing equipment according to claim 2, characterized in that: The transmission assembly (8) comprises a transmission box (81) fixedly mounted on the back of the cooling box (1), four sets of transmission wheels (82) being rotatably mounted inside the transmission box (81), the four sets of transmission wheels (82) being connected to each other via transmission toothed belts (83), the four sets of transmission wheels (82) being connected to four sets of spray rollers (4) respectively, and a driven pulley (85) being fixedly mounted on the outer side of the left lower transmission wheel (82); A transmission shaft is provided between the motor and the conveying roller (2), a driving pulley (86) and a driving bevel gear (87) are fixedly mounted on the outer side of the transmission shaft, the driving pulley (86) and the driven pulley (85) are connected via a transmission belt, a driven bevel gear (88) is fixedly mounted on the left side of the spiral pressure rod (71), and the driven bevel gear (88) is meshed with the driving bevel gear (87).

4. The container bag wire drawing equipment according to claim 3, characterized in that: A rotary sealing joint (84) is fixedly mounted on the outer side of the driving wheel (82), and the rotary sealing joint (84) is connected to the water outlet pipe (73).

5. The container bag wire drawing equipment according to claim 1, characterized in that: A condensation plate (61) is obliquely arranged inside the air outlet.

6. The container bag wire drawing equipment according to claim 5, characterized in that: The inner bottom of the wind shield (6) is designed to be inclined towards the middle, and a drainage pipe (62) is provided at the center of the inner bottom of the wind shield (6).

7. The container bag wire drawing equipment according to claim 1, characterized in that: The atomizing nozzles (5) on adjacent spray rollers (4) are designed to be staggered.

8. The container bag wire drawing equipment according to claim 1, characterized in that: A driven wheel (17) is fixedly mounted on the inner side of the exhaust fan (16), and a driving wheel (18) is rotatably mounted on the inner wall of the cooling box (1). The driving wheel (18) is meshed with the driven wheel (17), and the radius of the driving wheel (18) is greater than the radius of the driven wheel (17). The driving wheel (18) is fixedly connected to the spray roller (4) via a rotating shaft, and the rotating shaft passes through the wind shield (6).

9. The container bag wire drawing equipment according to claim 8, characterized in that: A fan-shaped through hole is provided inside the driving wheel (18).

10. A bulk bag wire drawing process, using a bulk bag wire drawing device as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Extrusion molding: Put the raw material particles into the extruder, heat them to melt them, and form a uniform molten plastic. The molten plastic is extruded through the die head to form a continuous film; S2, wire drawing cooling: the extruded film is initially stretched by mechanical stretching, the stretching ratio is determined according to the material properties, and then the film is passed through the first outer roller (11) and the second outer roller (12) into the cooling box (1), and double-sided spray cooling is performed using four groups of spray rollers (4) to quickly reduce the temperature and solidify the material; S3, cutting and winding: using an automatic cutting machine, the cooled plastic wire is cut into required lengths, and the cut plastic wire is wound into coils; S4. Post-processing: Check the quality of the finished products, including thickness, strength, and appearance, to ensure that they meet the standards, and package the qualified container bags.

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