An extrusion molding machine for producing woven bag materials from waste plastics.

Abstract

The present application belongs to the technical field of extrusion molding equipment, and particularly relates to an extrusion molding machine for producing woven bag material from waste plastic. The extrusion molding machine comprises a screw extruder, a feed inlet of the screw extruder is fixedly connected with a draining cylinder, a discharge cylinder is arranged above the draining cylinder, the discharge cylinder is fixed by a support, a discharge pipe is fixedly connected with a side wall of the discharge cylinder, and an electronic valve is arranged on the discharge pipe. The PP plastic particles, PVC plastic particles and dust particles can be completely separated by one-time pressing, and the separated PP plastic particles can be recycled and used for producing woven bag material. The PP, PVC and dust particles can be effectively separated and discharged at the same time. The PVC and dust particles can be collected and treated, so that the water can be recycled. The PP plastic particles entering the screw extruder are dry, so that the problem of air bubbles in the extruded particle product can be avoided.

Description

Technical Field

[0001] This invention belongs to the technical field of extrusion molding equipment, specifically relating to an extrusion molding machine for producing woven bag materials from waste plastics. Background Technology

[0002] Plastic granule extrusion molding equipment is a type of machinery used to heat, melt, and extrude plastic into granules, which are then cut into smaller pieces for use in the manufacture of various plastic products. This equipment melts plastic granules at high temperatures using an extruder and is propelled by a screw. It is widely used in the plastics processing industry, offering efficient, stable, and precise molding capabilities. This equipment is also commonly used for the recycling and reuse of waste plastics.

[0003] Chinese Patent Application No. 202410143508.0 discloses an extrusion molding machine for plastic extrusion molding, including a base plate, a discharge cylinder, and a feeding hopper. The discharge cylinder is installed on the top of the base plate, and a vertical cylinder is connected to one end of the discharge cylinder. A crushing cylinder is installed at the top of the vertical cylinder, and a feeding hopper is set at the top of the crushing cylinder. A storage frame is set on the top of the base plate near the discharge cylinder. The outer sides of the storage frame are fastened with fixing plates by bolts. While a first motor drives the crushing roller to rotate and crush, the up and down movement of the pulling block pulls the first connecting strip, which drives the first belt to rotate, thereby moving the feeding box to the storage frame to automatically collect hard plastic blocks. Then, the box is sent to the top of the feeding hopper, where the plastic blocks are automatically poured in, realizing an automatic feeding function. The operation is more labor-saving and convenient, improving work efficiency.

[0004] When producing woven bag materials from recycled plastics through extrusion molding, the materials are often lightweight, such as PP plastic granules mixed with PE plastic granules. PVC plastic granules cannot be used, as they would cause performance instability. Furthermore, if the recycled plastic granules contain a lot of dust and impurities, it will also affect the quality of the subsequent flat yarns, leading to frequent breakage. Therefore, when recycling recycled plastics for woven bag production, it is necessary to effectively separate PVC plastic granules and dust particles. How to quickly and automatically separate these two main components becomes a production challenge. Additionally, if the recycled PP plastic granules contain moisture during melt extrusion in the screw extruder, the moisture will evaporate, resulting in more air bubbles in the finished PP plastic granules, leading to a decline in quality and affecting subsequent woven bag production. Moreover, seamless automation during separation, moisture removal, and remelting extrusion is often difficult, resulting in slow production efficiency. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an extrusion molding machine for producing woven bag materials from waste plastics. Through the coordinated operation of the discharge cylinder, distribution pipe, and distribution mechanism, this invention achieves complete separation of PP plastic granules from dust and PVC plastic granules in a single pressing operation. This allows the separated PP plastic granules to be used for recycling and production of woven bag materials, effectively improving the quality of subsequent woven bag materials. The invention's annular mesh plate and closed disc structure design prevents gaps and mixing during the separation of PP, PVC, and dust, ensuring effective separation and discharge. The combination of a switching box and a draining cylinder not only collects and processes PVC and dust particles for convenient water recycling but also rapidly separates and dries PP granules from water, ensuring that the PP plastic granules entering the screw extruder are dry and preventing air bubbles in the extruded granules. This comprehensive approach achieves seamless and automated PP plastic granule separation and extrusion without manual intervention.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An extrusion molding machine for producing woven bag material from waste plastic includes a screw extruder, the feed inlet of the screw extruder is fixedly connected to a draining cylinder, a discharge cylinder is provided above the draining cylinder, the discharge cylinder is fixed by a bracket, a discharge pipe is fixedly connected to the side wall of the discharge cylinder, and an electronic valve is provided on the discharge pipe.

[0008] The discharge cylinder is equipped with a material distribution pipe inside, and a material distribution mechanism is installed inside the material distribution pipe. The top of the material distribution pipe is lower than the top of the discharge cylinder. A water inlet pipe and a material inlet pipe are provided above the material distribution pipe. The water inlet pipe, the material inlet pipe, and the material distribution mechanism are all mounted on a bracket.

[0009] Furthermore, the material dispensing mechanism includes a fixed plate, which is fixedly mounted on a bracket; the top of the material dispensing tube is fixedly connected to the bottom of the fixed plate via a support rod; a insertion tube is fixedly provided in the middle of the bottom of the fixed plate, a slide rod is inserted into the insertion tube, and a closing plate is fixedly connected to the bottom end of the slide rod; a limiting spring is sleeved on the slide rod, and the two ends of the limiting spring are fixedly connected to the insertion tube and the closing plate, respectively.

[0010] Furthermore, when the distribution pipe is filled with water, the sealing disc remains in sealed contact with the bottom of the distribution pipe, and the sealing disc is located above the discharge pipe.

[0011] Furthermore, the fixed plate has two symmetrical sliding holes, and a second sliding rod is slidably connected to the sliding holes; the upper end of the second sliding rod is fixedly connected to a support plate, and an electric telescopic rod is fixedly installed on the top of the fixed plate, with the output end of the electric telescopic rod fixedly connected to the support plate; the lower end of the second sliding rod is fixedly connected to an annular mesh plate, the inner wall of the annular mesh plate is slidably connected to the outer wall of the distribution pipe, and the outer wall of the annular mesh plate is slidably connected to the inner wall of the discharge cylinder.

[0012] Furthermore, when the feed pipe is feeding material, the annular mesh plate is located above the distribution pipe.

[0013] Furthermore, a first guide slope is fixedly provided on the inner bottom side of the annular mesh plate, and a second guide slope is fixedly provided on the outer top side of the closed disc; when the annular mesh plate abuts against the closed disc, the inner side of the first guide slope abuts against the inner side of the second guide slope.

[0014] Furthermore, a switching box is fixedly connected to the discharge pipe. The switching box has openings at the top and bottom, and inlet and outlet ports are respectively provided on both sides of the switching box. The inlet port is fixedly connected to the discharge pipe. A switching square groove is slidably connected inside the switching box, and the opening of the switching square groove is located on one side of the inlet port. Both the upper and lower ends of the switching square groove are provided with filter screens. A support plate is fixedly connected to the outside of the switching box by a second support rod. A through hole is provided on the support plate. A second electric telescopic rod is fixedly installed on the support plate. The output end of the second electric telescopic rod passes through the through hole and is fixedly connected to the filter screen at the upper end of the switching square groove.

[0015] Furthermore, an upper conical mesh cylinder and a lower conical guide cylinder are fixedly connected to the inner wall of the draining cylinder, with the large-diameter end of the upper conical mesh cylinder facing upwards and the large-diameter end of the lower conical guide cylinder facing downwards; the lower diameter ends of the upper conical mesh cylinder and the lower conical guide cylinder are fixedly connected and a second electronic valve is provided at the connection point; a drain pipe is fixedly connected to the connection point between the large-diameter end of the lower conical guide cylinder and the inner wall of the draining cylinder; and multiple heating plates are fixedly installed on the inner side wall of the upper conical mesh cylinder.

[0016] The large-diameter end of the lower conical guide cylinder is fixedly connected to the feed port of the screw extruder; the discharge port of the switching box is located above the draining cylinder.

[0017] Furthermore, a water tank is provided below the switching box; the switching box is fixedly mounted on a bracket.

[0018] This invention also claims a method for producing woven bag material using the above-described extrusion molding machine for producing woven bag material from waste plastic, comprising the following steps:

[0019] S1. Continuously add water and waste plastic particles to the water inlet pipe and the feed pipe respectively; the water and waste plastic particles enter the feed pipe, at which time PP plastic particles and dust particles float up and PVC plastic particles sink to the bottom of the feed pipe; with the continuous addition of water and waste plastic particles, PP plastic particles and dust particles overflow with the water and flow into the discharge cylinder.

[0020] S2. Stop the operation of the feed pipe and water inlet pipe, and start the electric telescopic rod to make the ring mesh plate move down to abut the closed plate. At this time, under the downward pressure of the ring mesh plate, the PP plastic particles are pressed into the bottom of the closed plate, and the dust particles pass through the ring mesh plate and still float on the surface of the water.

[0021] S3. Continue to move the ring screen down, so that the ring screen moves together with the closed plate to the bottom of the discharge pipe. At this time, the bottom of the distribution pipe is opened, and then the electronic valve is opened. PVC plastic particles and dust particles are discharged from the discharge pipe and enter the switching trough. Impurities are left in the switching trough, and water is separated through the filter screen.

[0022] S4. Start the electric telescopic rod to reset the ring screen plate and allow the PP plastic particles to float again. Then start the second electric telescopic rod to position the filter screen plate at the top of the switching trough below the feed port. At this time, the switching trough no longer blocks the discharge port. The PP plastic particles roll out of the discharge port along the filter screen plate at the top and enter the draining cylinder. The water is separated through the filter screen plate.

[0023] S5. PP plastic granules enter the upper conical screen cylinder. Residual water passes through the upper conical screen cylinder and flows along the lower conical guide cylinder to the bottom of the conical screen cylinder, where it is discharged by the drain pipe. After being dried by the heating plate, the second electronic valve is opened, allowing the dried PP plastic granules to enter the screw extruder for melt extrusion.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) This invention, through the cooperation of the discharge cylinder, the distribution pipe and the distribution mechanism, can achieve complete separation of PP plastic particles from dust particles and PVC plastic particles with a single press, so that the separated PP plastic particles can be used for the recycling and production of woven bag materials, thereby effectively improving the quality of subsequent woven bag materials; Specifically, water and waste plastic particles are continuously added to the water inlet pipe and the feed pipe respectively; the water and waste plastic particles enter the distribution pipe, at which time, due to density, the PP plastic particles and dust particles float up and the PVC plastic particles sink to the bottom of the distribution pipe; with the continuous addition of water and waste plastic particles, the PP plastic particles and dust particles overflow with the water and flow into the discharge cylinder; at this time, the initial separation of PP plastic particles and dust particles from PVC plastic particles is achieved; then, the operation of the feed pipe and the water inlet pipe is stopped, and the electric telescopic rod is started, so that the ring mesh plate The ring mesh plate moves downwards to meet the sealing disc. Under the downward pressure of the ring mesh plate, the PP plastic granules are pressed under the sealing disc, while dust particles pass through the ring mesh plate and remain floating on the water surface. This achieves a secondary separation of the PP plastic granules and dust particles. Finally, the ring mesh plate continues to move downwards, causing it to move together with the sealing disc to below the discharge pipe. At this point, the discharge pipe is opened, and PVC granules are discharged. Opening the electronic valve allows the PVC plastic granules and dust particles to be discharged from the discharge pipe. Then, the electric telescopic rod is activated to reset the ring mesh plate, allowing the PP plastic granules to float again and be discharged through the discharge pipe. This achieves complete separation of PP plastic granules from dust particles and PVC plastic granules with a single downward pressure, enabling the separated PP plastic granules to be used for the recycling and production of woven bag materials, thereby effectively improving the quality of subsequent woven bag materials.

[0026] (2) The present invention, through the structural design of the annular mesh plate and the closed disc, can prevent the problem of gap mixing when separating PP, PVC, dust and other substances, so as to effectively separate and discharge them at the same time. Specifically, through the structural design of the first guide slope and the second guide slope, when the annular mesh plate presses down against the closed disc, even if there are PP plastic particles remaining on the top of the closed disc, the PP plastic particles are squeezed outward by the guiding action of the first guide slope and the second guide slope, so as not to hinder the annular mesh plate from abutting the closed disc, avoiding gaps that would cause PP plastic particles and PVC plastic particles to mix together again, so as to effectively separate and discharge PP plastic particles, PVC plastic particles, dust and other substances at the same time.

[0027] (3) This invention, through the combination of the switching box and the draining cylinder, can not only collect and process PVC, dust and other particles to facilitate water recycling; at the same time, it can also quickly separate and dry PP particles from water, thereby ensuring that the PP plastic particles entering the screw extruder are in a dry state and avoiding the problem of air bubbles in the extruded granules. It comprehensively realizes the seamless automatic connection of PP plastic particle separation and extrusion without manual intervention. Specifically, when PVC plastic particles and dust particles are discharged from the discharge pipe and enter the switching square trough, the impurities have been left in the switching square trough, and the water is separated through the filter screen and can be further recycled. At the same time, the electric telescopic rod is activated to reset the annular screen, allowing the PP plastic particles to return to the floating state. Then, the second electric telescopic rod is activated to position the filter screen at the upper end of the switching square trough below the feed port. At this time, the switching square trough no longer blocks the discharge port, and the PP plastic particles are discharged automatically. The granules roll out of the discharge port along the upper filter screen and enter the draining cylinder. Water is separated through the filter screen, thus achieving initial separation of PP plastic granules and water, at which point most of the water is separated. Finally, through the action of the draining cylinder, the PP plastic granules enter the upper conical screen cylinder. Residual water passes through the upper conical screen cylinder and flows along the lower conical guide cylinder to the bottom of the conical screen cylinder and is discharged by the drain pipe. Since most of the water has been separated by the switching square channel, there is almost no water residue due to the isolation of the upper conical screen cylinder. At this time, the heating plate can quickly dry the PP plastic granules, thus ensuring no residual moisture. Finally, the second electronic valve is opened, allowing the dried PP plastic granules to enter the screw extruder for melt extrusion. The extrusion process is not affected by water evaporation, and the extruded plastic granules will no longer have air bubble problems. The separation and extrusion of PP plastic granules are seamlessly connected and automatically carried out without manual intervention. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of an extrusion molding machine for producing woven bag materials from waste plastics according to the present invention;

[0029] Figure 2 This is a schematic diagram of the dispersion structure of an extrusion molding machine for producing woven bag materials from waste plastics according to the present invention;

[0030] Figure 3 This is a schematic diagram of a partially dispersed structure of an extrusion molding machine for producing woven bag materials from waste plastics according to the present invention;

[0031] Figure 4 This is a schematic diagram of the switching box dispersion structure of an extrusion molding machine for producing woven bag materials from waste plastics according to the present invention;

[0032] Figure 5 This is a schematic diagram of the cross-sectional structure of the discharge cylinder and the material distribution mechanism of an extrusion molding machine for producing woven bag materials from waste plastics according to the present invention.

[0033] Figure 6 This is a schematic diagram of the cross-sectional structure of the switching box of an extrusion molding machine for producing woven bag materials from waste plastics according to the present invention;

[0034] Figure 7 This is a schematic diagram of the cross-sectional structure of the drain cylinder of an extrusion molding machine for producing woven bag materials from waste plastics according to the present invention;

[0035] Figure 8 This is a schematic diagram of the cross-sectional structure of the material distribution mechanism in different states of an extrusion molding machine for producing woven bag materials from waste plastics according to the present invention;

[0036] Figure 9 This is a schematic diagram of the cross-sectional structure of the drain cylinder in different states of an extrusion molding machine for producing woven bag materials from waste plastics according to the present invention.

[0037] The attached figures are labeled as follows:

[0038] Screw extruder-100, feed inlet-110, discharge cylinder-200, discharge pipe-210, electronic valve-211, switching box-300, discharge port-310, feed port-311, switching square groove-320, filter screen-321, support plate-330, through hole-331, second support rod-340, second electric telescopic rod-350, drain cylinder-400, drain pipe-410, upper conical screen cylinder-420, lower conical guide cylinder-430, second electronic valve Door-440, Water Tank-500, Bracket-600, Distributor Pipe-700, Support Rod-710, Distributor Mechanism-800, Fixed Plate-810, Sliding Hole-811, Insert Pipe-820, Sliding Rod-830, Limit Spring-840, Sealing Plate-850, Second Guide Inclined Surface-851, Electric Telescopic Rod-860, Second Sliding Rod-870, Annular Mesh Plate-880, First Guide Inclined Surface-881, Support Plate-890, Water Inlet Pipe-910, Feed Pipe-920. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0040] Although the steps in this invention are arranged with reference numerals, this is not intended to limit the order of the steps. Unless the order of the steps is explicitly stated or the execution of a step requires other steps as a basis, the relative order of the steps can be adjusted. It is understood that the term "and / or" as used herein refers to and covers any and all possible combinations of one or more of the associated listed items. Example

[0041] like Figures 1-9 As shown, an extrusion molding machine for producing woven bag materials from waste plastic includes a screw extruder 100. The feed inlet 110 of the screw extruder 100 is fixedly connected to a draining cylinder 400. A discharge cylinder 200 is provided above the draining cylinder 400. The discharge cylinder 200 is fixed by a bracket 600. A discharge pipe 210 is fixedly connected to the side wall of the discharge cylinder 200. An electronic valve 211 is provided on the discharge pipe 210.

[0042] The discharge cylinder 200 is provided with a material distribution pipe 700 inside, and a material distribution mechanism 800 is installed inside the material distribution pipe 700. The top height of the material distribution pipe 700 is lower than the top height of the discharge cylinder 200. A water inlet pipe 910 and a material inlet pipe 920 are provided above the material distribution pipe 700. The water inlet pipe 910, the material inlet pipe 920 and the material distribution mechanism 800 are all mounted on the bracket 600.

[0043] This invention, through the cooperation of the discharge cylinder 200, the distribution pipe 700, and the distribution mechanism 800, can automatically separate heavier plastic particles such as PVC and lighter impurities such as dust particles from waste plastic granules. This allows the separated PP plastic granules to be used for the recycling and production of woven bag materials, thereby effectively improving the quality of subsequent woven bag materials; a detailed description will follow.

[0044] Furthermore, the material distribution mechanism 800 includes a fixed plate 810, which is fixedly mounted on the bracket 600; the top of the material distribution pipe 700 is fixedly connected to the bottom of the fixed plate 810 via a support rod 710; a insertion pipe 820 is fixedly provided in the middle of the bottom of the fixed plate 810, a slide rod 830 is inserted into the insertion pipe 820, and a closing plate 850 is fixedly connected to the bottom end of the slide rod 830; a limiting spring 840 is sleeved on the slide rod 830, and the two ends of the limiting spring 840 are fixedly connected to the insertion pipe 820 and the closing plate 850 respectively.

[0045] Furthermore, when the distribution pipe 700 is filled with water, the sealing plate 850 remains in sealed contact with the bottom of the distribution pipe 700, and the sealing plate 850 is located above the discharge pipe 210.

[0046] Through the structural design of the closed disc 850 and the limiting spring 840, the material distribution pipe 700 can hold a certain amount of water and waste plastic particles without interference, thus facilitating subsequent separation and recycling.

[0047] It is worth noting that by pulling the limit spring 840, the sealing disc 850 can be tightly pressed against the bottom of the distribution pipe 700 to achieve a seal. At the same time, the sealing performance can be improved by using a rubber sealing ring at the bottom of the distribution pipe 700. This is a standard setting and will not be described in detail here.

[0048] Furthermore, the fixed disk 810 has two symmetrically arranged sliding holes 811, and a second sliding rod 870 is slidably connected to the sliding holes 811; the upper ends of the second sliding rod 870 are jointly and fixedly connected to a support disk 890, and an electric telescopic rod 860 is fixedly installed on the top of the fixed disk 810, the output end of the electric telescopic rod 860 being fixedly connected to the support disk 890; the lower ends of the second sliding rod 870 are jointly and fixedly connected to an annular mesh plate 880, the inner wall of the annular mesh plate 880 being slidably connected to the outer wall of the distribution pipe 700, and the outer wall of the annular mesh plate 880 being slidably connected to the inner wall of the discharge cylinder 200.

[0049] This invention involves continuously adding water and waste plastic particles into the water inlet pipe 910 and the feed pipe 920, respectively. The water and waste plastic particles enter the distribution pipe 700. Due to density differences, PP plastic particles and dust particles float to the top, while PVC plastic particles sink to the bottom of the distribution pipe 700. With the continuous addition of water and waste plastic particles, PP plastic particles and dust particles overflow with the water and flow into the discharge cylinder 200, achieving initial separation of PP plastic particles, dust particles, and PVC plastic particles. Next, the operation of the feed pipe 920 and the water inlet pipe 910 is stopped, and the electric telescopic rod 860 is activated, causing the annular mesh plate 880 to move downwards and abut against the sealing disc 850. Under the downward pressure of the annular mesh plate 880, the PP plastic particles are pressed under the sealing disc 850, and the dust particles pass through the annular mesh plate 880 and... The PP plastic particles remain floating on the water surface, achieving secondary separation of PP plastic particles from dust particles. Finally, the annular mesh plate 880 continues to move downwards, causing it to move along with the closed disc 850 to below the discharge pipe 210. At this point, the discharge pipe 210 is opened, and the PVC particles are discharged. Opening the electronic valve 211 allows both PVC plastic particles and dust particles to be discharged from the discharge pipe 210. Then, the electric telescopic rod 860 is activated to reset the annular mesh plate 880, restoring the PP plastic particles to their floating state. The PP plastic particles can then be discharged through the discharge pipe 210, thus achieving complete separation of PP plastic particles from dust particles and PVC plastic particles with a single downward press. This allows the separated PP plastic particles to be used for the recycling and production of woven bag materials, effectively improving the quality of subsequent woven bag materials.

[0050] It is worth noting that the electric telescopic rod 860, electronic valve 211 and other electrical equipment of the present invention are all powered by an external power source, and will not be described in detail here.

[0051] Furthermore, when material is fed through the feed pipe 920, the annular mesh plate 880 is positioned above the distribution pipe 700. This structural design facilitates the overflow of PP plastic particles and dust impurities into the discharge cylinder 200.

[0052] Furthermore, a first guide slope 881 is fixedly provided on the inner bottom side of the annular mesh plate 880, and a second guide slope 851 is fixedly provided on the outer top side of the closed disk 850; when the annular mesh plate 880 abuts against the closed disk 850, the inner side of the first guide slope 881 abuts against the inner side of the second guide slope 851.

[0053] This invention, through the structural design of the annular mesh plate 880 and the closed disc 850, can prevent gaps and mixing when separating substances such as PP, PVC, and dust, thus effectively separating and discharging them simultaneously. Specifically, through the structural design of the first guide slope 881 and the second guide slope 851, when the annular mesh plate 880 presses down against the closed disc 850, even if there are PP plastic particles remaining on the closed disc 850, the guiding action of the first guide slope 881 and the second guide slope 851 causes the PP plastic particles to be squeezed outwards, thus preventing the annular mesh plate 880 from pressing against the closed disc 850 and avoiding gaps that would cause PP plastic particles and PVC plastic particles to mix together again. This effectively separates and discharges PP plastic particles, PVC plastic particles, dust, and other substances simultaneously.

[0054] Furthermore, a switching box 300 is fixedly connected to the discharge pipe 210. The switching box 300 has openings at the top and bottom, and inlet ports 311 and outlet ports 310 are respectively opened on both sides of the switching box 300. The inlet ports 311 are fixedly connected to the discharge pipe 210. A switching square groove 320 is slidably connected inside the switching box 300. The opening of the switching square groove 320 is located on one side of the inlet port 311. Both the upper and lower ends of the switching square groove 320 are provided with filter screen plates 321. A support plate 330 is fixedly connected to the outside of the switching box 300 through a second support rod 340. The support plate 330 has through holes 331. A second electric telescopic rod 350 is fixedly installed on the support plate 330. The output end of the second electric telescopic rod 350 passes through the through hole 331 and is fixedly connected to the filter screen plate 321 at the upper end of the switching square groove 320.

[0055] This invention, through the cooperation of the switching box 300 and the draining cylinder 400, can not only collect and process PVC, dust and other particles to facilitate water recycling, but also quickly separate and dry PP particles from water, thereby ensuring that the PP plastic particles entering the screw extruder 100 are in a dry state and avoiding air bubbles in the extruded granule product. It comprehensively realizes the seamless automatic connection between PP plastic particle separation and extrusion without manual intervention; a detailed description follows.

[0056] Furthermore, an upper conical mesh cylinder 420 and a lower conical guide cylinder 430 are fixedly connected to the inner wall of the draining cylinder 400. The large-diameter end of the upper conical mesh cylinder 420 faces upward, and the large-diameter end of the lower conical guide cylinder 430 faces downward. The lower diameter ends of the upper conical mesh cylinder 420 and the lower conical guide cylinder 430 are fixedly connected, and a second electronic valve 440 is provided at the connection point. A drain pipe 410 is fixedly connected to the connection point between the large-diameter end of the lower conical guide cylinder 430 and the inner wall of the draining cylinder 400. Multiple heating plates are fixedly installed on the inner side wall of the upper conical mesh cylinder 420.

[0057] The large-diameter end of the lower conical guide cylinder 430 is fixedly connected to the feed port 110 of the screw extruder 100; the discharge port 310 of the switching box 300 is located above the draining cylinder 400.

[0058] In this invention, when PVC plastic granules and dust particles are discharged from the discharge pipe 210 and enter the switching trough 320, impurities are retained in the switching trough 320, and water is separated through the filter screen 321 and can be further recycled. Simultaneously, the electric telescopic rod 860 is activated to reset the annular screen 880, allowing the PP plastic granules to float again. Then, the second electric telescopic rod 350 is activated, positioning the filter screen 321 at the upper end of the switching trough 320 below the inlet port 311. At this point, the switching trough 320 no longer blocks the discharge port 310, and the PP plastic granules roll out of the discharge port 310 along the upper filter screen 321 and enter the draining cylinder 400. Water is separated through the filter screen 321, thus achieving initial separation of the PP plastic granules and water. At this stage, most of the water is separated. The PP plastic granules are then drained through the draining cylinder 400 and enter the upper conical mesh cylinder 420. Residual water passes through the upper conical mesh cylinder 420 and flows along the lower conical guide cylinder 430 to the bottom of the conical mesh cylinder 420, where it is discharged by the drain pipe 410. Since most of the water has been separated by the switching square groove 320, there is almost no water residue due to the isolation of the upper conical mesh cylinder 420. At this point, the heating plate can quickly dry the PP plastic granules, ensuring that there is no residual moisture. Finally, the second electronic valve 440 is opened to allow the dried PP plastic granules to enter the screw extruder 100 for melt extrusion. Since there is no water evaporation during the extrusion process, the extruded plastic granules will no longer have air bubbles. This process achieves seamless automatic separation and extrusion of PP plastic granules without manual intervention.

[0059] Furthermore, a water tank 500 is provided below the switching box 300; the switching box 300 is fixedly mounted on the bracket 600. The water tank 500 facilitates the storage of water for reuse, such as through water pump circulation.

[0060] A method for producing woven bag materials using the extrusion molding machine described above, comprising the following steps:

[0061] S1. Water and waste plastic particles are continuously added to the water inlet pipe 910 and the feed pipe 920 respectively; the water and waste plastic particles enter the feed distribution pipe 700, at which time PP plastic particles and dust particles float up and PVC plastic particles sink to the bottom of the feed distribution pipe 700; with the continuous addition of water and waste plastic particles, PP plastic particles and dust particles overflow with the water and flow into the discharge cylinder 200.

[0062] S2. Stop the operation of feed pipe 920 and water inlet pipe 910, and start electric telescopic rod 860 to make the annular mesh plate 880 move down to abut the closed plate 850. At this time, under the downward pressure of the annular mesh plate 880, PP plastic particles are pressed into the closed plate 850, and dust particles pass through the annular mesh plate 880 and still float on the surface of the water.

[0063] S3. Continue to move the annular mesh plate 880 down, so that the annular mesh plate 880 and the closed plate 850 move down together to below the discharge pipe 210. At this time, the bottom of the distribution pipe 700 is opened, and then the electronic valve 211 is opened. PVC plastic particles and dust particles are discharged from the discharge pipe 210 and enter the switching square trough 320. Impurities are left in the switching square trough 320, and water is separated through the filter mesh plate 321.

[0064] S4. Start the electric telescopic rod 860 to reset the annular mesh plate 880, allowing the PP plastic particles to return to a floating state. Then start the second electric telescopic rod 350 to position the filter screen plate 321 at the upper end of the switching square trough 320 below the feed port 311. At this time, the switching square trough 320 no longer blocks the discharge port 310. The PP plastic particles roll out of the discharge port 310 along the upper filter screen plate 321 and enter the draining cylinder 400. The water is separated through the filter screen plate 321.

[0065] S5. PP plastic granules enter the upper conical screen cylinder 420. Residual water passes through the upper conical screen cylinder 420 and flows along the lower conical guide cylinder 430 to the bottom of the conical screen cylinder 420 and is discharged by the drain pipe 410. After being dried by the heating plate, the second electronic valve 440 is opened to allow the dried PP plastic granules to enter the screw extruder 100 for melt extrusion.

[0066] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. An extrusion molding machine for producing woven bag materials from waste plastics, characterized in that, Including screw extruder (100), the feed port (110) of screw extruder (100) is fixedly communicated with draining cylinder (400), the upper part of draining cylinder (400) is provided with discharge cylinder (200), discharge cylinder (200) is fixed by support (600), the side wall of discharge cylinder (200) is fixedly communicated with discharge pipe (210), and electronic valve (211) is arranged on discharge pipe (210); The inside of discharge cylinder (200) is provided with distribution pipe (700), distribution pipe (700) is internally provided with distribution mechanism (800), and the top end height of distribution pipe (700) is lower than the top end height of discharge cylinder (200); the upper part of distribution pipe (700) is provided with water inlet pipe (910) and feed pipe (920), and water inlet pipe (910), feed pipe (920) and distribution mechanism (800) are all installed on support (600); The discharge pipe (210) is fixedly communicated with the switching box (300), the top and bottom of the switching box (300) are open, the two sides of the switching box (300) are respectively provided with an inlet port (311) and an outlet port (310), and the inlet port (311) is fixedly communicated with the discharge pipe (210); the switching box (300) is slidably connected with a switching square groove (320) inside up and down, and the opening of the switching square groove (320) is located on the side of the inlet port (311); the upper and lower ends of the switching square groove (320) are provided with filter screen plates (321); the switching box (300) is fixedly connected with a support plate (330) outside through a second supporting rod (340), and a through hole (331) is formed in the support plate (330); a second electric telescopic rod (350) is fixedly installed on the support plate (330), and the output end of the second electric telescopic rod (350) penetrates through the through hole (331) and is fixedly connected with the filter screen plate (321) at the upper end of the switching square groove (320); The inner wall of the draining cylinder (400) is fixedly connected with an upper conical mesh cylinder (420) and a lower conical guide cylinder (430), the large-diameter end of the upper conical mesh cylinder (420) faces upward, and the large-diameter end of the lower conical guide cylinder (430) faces downward; the lower-diameter end of the upper conical mesh cylinder (420) and the lower conical guide cylinder (430) is fixedly communicated, and a second electronic valve (440) is arranged at the communication position; the large-diameter end of the lower conical guide cylinder (430) is fixedly communicated with the drain pipe (410) at the connection position with the inner wall of the draining cylinder (400); a plurality of heating plates are fixedly installed on the inner side wall of the upper conical mesh cylinder (420); The large-diameter end of the lower conical guide cylinder (430) is fixedly communicated with the feed port (110) of the screw extruder (100); the outlet port (310) of the switching box (300) is located above the draining cylinder (400).

2. The extrusion molding machine for producing braided bag material using waste plastic according to claim 1, characterized in that, The distributing mechanism (800) comprises a fixed disc (810) fixedly installed on the support (600); the top of the distributing pipe (700) is fixedly connected with the bottom of the fixed disc (810) through a support rod (710); the bottom of the fixed disc (810) is fixedly provided with a plug pipe (820) in the middle, the plug pipe (820) is plugged with a sliding rod (830), and the bottom end of the sliding rod (830) is fixedly connected with a closing disc (850); the sliding rod (830) is sleeved with a limiting spring (840), and the two ends of the limiting spring (840) are fixedly connected with the plug pipe (820) and the closing disc (850) respectively.

3. The extrusion molding machine for producing braided bag material using waste plastic according to claim 2, characterized in that, When the distributing pipe (700) is filled with water, the closing disc (850) still sealingly abuts against the bottom of the distributing pipe (700), and the closing disc (850) is located above the discharging pipe (210).

4. The extrusion molding machine for producing braided bag material using waste plastic according to claim 2, characterized in that, The fixed disc (810) is symmetrically provided with two sliding holes (811), the second sliding rod (870) is slidingly connected with the sliding holes (811); the upper ends of the second sliding rod (870) are fixedly connected with a supporting disc (890), the top of the fixed disc (810) is fixedly installed with an electric telescopic rod (860), the output end of the electric telescopic rod (860) is fixedly connected with the supporting disc (890); the lower ends of the second sliding rod (870) are fixedly connected with an annular mesh plate (880), the inner wall of the annular mesh plate (880) is slidingly connected with the outer wall of the distributing pipe (700), and the outer wall of the annular mesh plate (880) is slidingly connected with the inner wall of the discharging cylinder (200).

5. The extrusion molding machine for producing braided bag material using waste plastic according to claim 4, wherein When the feeding pipe (920) feeds, the annular mesh plate (880) is located above the distributing pipe (700).

6. The extrusion molding machine for producing braided bag material using waste plastic according to claim 4, wherein The bottom inner side of the annular mesh plate (880) is fixedly provided with a first guide inclined surface (881), and the top outer side of the closing disc (850) is fixedly provided with a second guide inclined surface (851); when the annular mesh plate (880) abuts against the closing disc (850), the inner side of the first guide inclined surface (881) abuts against the inner side of the second guide inclined surface (851).

7. The extrusion molding machine for producing braided bag material using waste plastic according to claim 1, wherein The lower side of the switching box (300) is provided with a water tank (500), and the switching box (300) is fixedly installed on the support (600).

8. A method of producing a woven bag material using the extrusion molding machine for producing a woven bag material according to any one of claims 1 to 7, characterized by, The method comprises the following steps: S1, water and waste plastic particles are continuously added into the water inlet pipe (910) and the feeding pipe (920) respectively; the water and the waste plastic particles enter the distributing pipe (700), at this time, the PP plastic particles and the dust particles float up, and the PVC plastic particles sink to the bottom of the distributing pipe (700); under the continuous addition of the water and the waste plastic particles, the PP plastic particles and the dust particles overflow and flow into the discharging cylinder (200) along with the water body; S2, the operation of the feeding pipe (920) and the water inlet pipe (910) is stopped, and the electric telescopic rod (860) is started to make the annular mesh plate (880) abut against the closing disc (850), at this time, under the pressing action of the annular mesh plate (880), the PP plastic particles are pressed below the closing disc (850), and the dust particles pass through the annular mesh plate (880) and still float on the water surface; S3, continue to make the ring net plate (880) down, the ring net plate (880) drive the closed disc (850) to move down to the discharge pipe (210) below, at this time the bottom of the distribution pipe (700) is opened, then the electronic valve (211) is opened, the PVC plastic particles and dust particles are discharged from the discharge pipe (210) and enter the switching square groove (320), the impurities are left in the switching square groove (320), and the water is separated through the filter screen plate (321); S4, start the electric telescopic rod (860) to reset the ring net plate (880), let the PP plastic particles restore the floating state, then start the second electric telescopic rod (350), make the filter screen plate (321) at the upper end of the switching square groove (320) below the feeding port (311), at this time the switching square groove (320) no longer blocks the discharge port (310), the PP plastic particles roll out of the discharge port (310) along the filter screen plate (321) at the upper end and enter the draining cylinder (400), and the water is separated through the filter screen plate (321); S5, the PP plastic particles enter the upper conical net cylinder (420), the residual water passes through the upper conical net cylinder (420) and flows along the lower conical guide cylinder (430) to the bottom of the conical net cylinder (420) to be discharged by the drain pipe (410), after drying by the heating plate, the second electronic valve (440) is opened, and the dried PP plastic particles enter the internal part of the screw extruder (100) to be melted and extruded.

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