Front screening, cleaning and drying equipment for PETG extrusion molding

Abstract

The invention provides front screening, cleaning and drying equipment for PETG extrusion molding, and belongs to the field of injection molding production. Comprising an outer shell and an inner ring, and the inner ring is arranged in the center of an inner cavity of the outer shell. By arranging the double screening assembly, the rotary driving assembly and the cleaning assembly, a motor drives a rotating shaft to rotate, the rotating shaft drives a first gear to rotate, the first gear is meshed with an outer ring gear and an inner ring gear on the two sides to rotate, the outer ring gear drives a first movable frame to rotate, and the inner ring gear drives a second movable frame to rotate; at the moment, efficient screening operation of the PETG raw materials can be achieved through the first screen and the second screen, the screening effect is good, a water source is injected into the transverse pipe through external equipment in the PETG raw material screening process, the water source is sprayed out of the inner cavity of the outer shell through the nozzles, the PETG raw materials are screened and cleaned at the same time, and the screening efficiency is improved. The pretreatment efficiency of the PETG raw material can be further improved.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molding production, and in particular relates to a pre-screening, cleaning and drying device for PETG extrusion molding. Background Art

[0002] PETG is a non-crystalline copolyester with glass-like transparency and density close to that of glass, good gloss, chemical resistance, impact resistance, and easy processing. It can be injection molded, injection stretch blow molded, and extrusion blow molded. It can also produce unique shapes, appearances, and special effects, such as bright colors, frosted, marble textures, metallic luster, etc., and can also be overlapped with other polyesters, elastic plastics, or ABS for injection molding.

[0003] At present, PETG is widely used in the fields of packaging, sheet materials and medical treatment. In the production process of PETG, due to external or machine-induced reasons during the manufacture of PETG, the particle size of PETG may be uneven, which is not conducive to the extrusion processing of PETG; and in the process of transporting and filling PETG, it is susceptible to the influence of the external environment and causes the entry of impurities. If these impurities are not removed, the quality of PETG products will be affected, which is not conducive to the operation of injection molding equipment and the improvement of product quality. Based on the above reasons, the present invention proposes a pre-screening, cleaning and drying device for PETG extrusion molding. Summary of the invention

[0004] (1) Technical issues to be resolved In view of the deficiencies in the prior art, the object of the present invention is to provide a pre-screening, cleaning and drying device for PETG extrusion molding, which has the advantages of being able to screen, clean and dry PETG.

[0005] (2) Technical solution In order to solve the above technical problems, the present invention provides a pre-screening, cleaning and drying equipment for PETG extrusion molding, comprising an outer shell, an inner ring is arranged at the center of the inner cavity of the outer shell, a feed pipe is fixedly connected to the top surface of the inner ring, the feed pipe passes through the top surface of the outer shell and is fixedly connected to the outer shell, an outer ring is concentrically arranged on the outside of the inner ring, a discharge pipe is fixedly connected to the bottom surface of the outer ring, the bottom end of the discharge pipe passes through the bottom surface of the outer shell and is fixedly connected to the outer shell, the outer ring is fixedly connected to the feed pipe, double screening components are arranged on both sides of the inner ring and the outer ring, a rotating drive component is arranged on the left and right side walls of the outer shell, a cleaning component is arranged in the outer shell, and a multi-layer drying component is arranged on the bottom surface of the outer shell.

[0006] Preferably, the double screening component includes a first movable frame, which is movably connected to the left and right sides of the inner ring, and is movably connected to the outer shell on the side away from the inner ring, and a plurality of first screens are evenly installed on the first movable frame, and a second movable frame is movably connected to the left and right sides of the outer ring, and is movably connected to the side of the second movable frame away from the outer ring and the first movable frame, and a plurality of second screens are evenly installed on the second movable frame, and screen installation components are provided on both the first movable frame and the second movable frame.

[0007] Furthermore, the screen installation assembly includes an arc groove, and the side walls of the first movable frame and the second movable frame are both provided with arc grooves, springs are fixedly connected in the arc grooves, and an arc plate is fixedly connected to the other end of the spring, and the arc plate extends out of the arc groove away from one end of the spring and is tightly arranged on the outer walls of the first screen and the second screen, respectively.

[0008] Furthermore, spiral push plates are fixedly connected to the inner side walls of the first movable frame and the second movable frame, and the spiral push plates in the first movable frame and the second movable frame are arranged to rotate in opposite directions.

[0009] Furthermore, three of the first screen and the second screen are arranged in a ring array, and the screening diameter of the first screen is larger than the screening diameter of the second screen.

[0010] Furthermore, the rotating drive assembly includes a motor, which is fixedly connected to the left and right outer walls of the outer shell, a rotating shaft is fixedly connected to the rotor of the motor, the rotating shaft passes through the outer shell at one end away from the motor and is fixedly connected to the first gear, an outer ring gear is fixedly connected to the outer wall of the first movable frame, an inner ring gear is fixedly connected to the side wall of the second movable frame away from the outer ring, and the two sides of the first gear are respectively meshed with the outer ring gear and the inner ring gear.

[0011] Furthermore, the cleaning component includes a transverse tube, which is arranged in the inner cavity of the outer shell. The transverse tube is concentrically arranged with the inner ring and its two ends respectively penetrate the first movable frame on both sides. The transverse tube is located on the side wall of the inner cavity of the outer shell and is evenly distributed and fixedly connected to a plurality of nozzles. Two drainage pipes are symmetrically fixedly connected to the bottom surface of the outer shell.

[0012] Furthermore, the multi-layer drying assembly includes a fixed shell, which is fixedly connected to the bottom surface of the outer shell, the discharge pipe passes through the fixed shell and is fixedly connected to the fixed shell, the bottom surface of the fixed shell is fixedly connected with a discharge pipe, and a plurality of heating plates are fixedly connected to the left and right side walls of the inner cavity of the fixed shell, and the heating plates are inclined toward the center direction of the inner cavity of the fixed shell, and an exhaust device is fixedly connected to the front side wall of the fixed shell, and the exhaust device is connected to the inner cavity of the fixed shell.

[0013] Furthermore, the width of the inner ring is larger than that of the outer ring, and a guide plate is fixedly connected to the bottom surface of the inner cavity of the inner ring.

[0014] Furthermore, annular grooves are provided on the left and right side walls of the inner ring and the outer ring, and annular plates are fixedly connected to the first movable frame and the second movable frame near the center of the outer shell, and the annular plates are respectively inserted into the annular grooves and movably connected to the annular grooves.

[0015] (3) Beneficial effects Compared with the prior art, the present invention has the following beneficial effects: The present invention is provided with a double screening component, a rotating drive component and a cleaning component. The motor drives the rotating shaft to rotate, the rotating shaft drives the first gear to rotate, the first gear meshes with the outer ring gear and the inner ring gear on both sides to rotate, the outer ring gear drives the first movable frame to rotate, and the inner ring gear drives the second movable frame to rotate. At this time, the first screen and the second screen can realize the efficient screening operation of the PETG raw material, the screening effect is good, and in the process of screening the PETG raw material, the water source is filled into the horizontal pipe through the external equipment, and the water source is sprayed into the inner cavity of the shell body through the nozzle, so that the PETG raw material is screened and cleaned at the same time, which can further improve the pre-treatment efficiency of the PETG raw material. The present invention is provided with a multi-layer drying component. When the PETG raw material with moisture is input into the inner cavity of the fixed shell through the discharge pipe, the PETG raw material is continuously heated and dried by the heating plate, and the exhaust device is started, so that the moisture on the PETG raw material can be effectively removed, and the drying effect is good. The dried PETG raw material is input into the injection molding equipment through the discharge pipe, so that the pre-treatment operation of the PETG raw material is completed, and the quality of PETG production is improved. The present invention is provided with a screen installation component. By pushing the arc plate, the arc plate compresses the spring and is retracted into the arc groove. At this time, the first screen is inserted into the first movable frame, and then the arc plate is loosened. The arc plate is extended out of the arc groove under the push of the spring, so that the first screen is positioned and installed on the first movable frame. Similarly, the second screen can be installed on the second movable frame. The first screen and the second screen with specified screening diameters can be selected according to the required specifications of the PETG raw material, so that the screening effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the front three-dimensional structure of the present invention; Figure 2 It is a side perspective structural schematic diagram of the present invention; Figure 3 It is a cross-sectional three-dimensional structural schematic diagram of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the interior of the outer shell of the present invention; Figure 5is a schematic diagram of the three-dimensional structure of the double screening assembly of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the feed pipe of the present invention; Figure 7 is a schematic diagram of the three-dimensional structure of the second movable frame of the present invention; Figure 8 is a schematic diagram of the three-dimensional structure of the rotary drive assembly of the present invention; Fig. 9 is a three-dimensional structural schematic diagram of the screen installation assembly of the present invention; Fig.10 It is a three-dimensional structural schematic diagram of the guide plate of the present invention.

[0017] The markings in the accompanying drawings are: outer shell; 2, inner ring; 3, feed pipe; 4, outer ring; 5, discharge pipe; 6, double screening assembly; 7, rotary drive assembly; 8, cleaning assembly; 9, multi-layer drying assembly; 10, first movable frame; 11, first screen; 12, second movable frame; 13, second screen; 14, screen installation assembly; 15, spring; 16, arc plate; 17, spiral push plate; 18, motor; 19, rotating shaft; 20, first gear; 21, outer ring gear; 22, inner ring gear; 23, cross pipe; 24, nozzle; 25, drain pipe; 26, fixed shell; 27, discharge pipe; 28, heating plate; 29, guide plate; 30, annular groove; 31, annular plate; 32, exhaust equipment. DETAILED DESCRIPTION

[0018] This specific embodiment is a pre-screening, cleaning and drying equipment for PETG extrusion molding, and its structural schematic diagram is as follows Figure 1-Figure 10 As shown, the PETG extrusion pre-screening, cleaning and drying equipment comprises an outer shell 1, an inner ring 2 is arranged at the center of the inner cavity of the outer shell 1, a feed pipe 3 is fixedly connected to the top surface of the inner ring 2, the feed pipe 3 penetrates the top surface of the outer shell 1 and is fixedly connected to the outer shell 1, an outer ring 4 is concentrically arranged outside the inner ring 2, a discharge pipe 5 is fixedly connected to the bottom surface of the outer ring 4, the bottom end of the discharge pipe 5 penetrates the bottom surface of the outer shell 1 and is fixedly connected to the outer shell 1, and the outer ring 4 is fixedly connected to the feed pipe 3; In the technical solution of this embodiment, convenient feeding and discharging operations of PETG raw materials can be realized, and the convenience of use is good; Furthermore, the width of the inner ring 2 is greater than the width of the outer ring 4, and a guide plate 29 is fixedly connected to the bottom surface of the inner cavity of the inner ring 2, which can effectively guide and disperse the raw materials and improve the screening efficiency; A double screening component 6 is arranged on both sides of the inner ring 2 and the outer ring 4, and the double screening component 6 includes a first movable frame 10, and the left and right sides of the inner ring 2 are movably connected with the first movable frame 10, and the first movable frame 10 is movably connected to the outer shell 1 on the side away from the inner ring 2, and a plurality of first screens 11 are evenly distributed and installed on the first movable frame 10, and the left and right sides of the outer ring 4 are movably connected with the second movable frame 12, and the second movable frame 12 is movably connected to the side away from the outer ring 4 and the first movable frame 10, and a plurality of second screens 13 are evenly distributed and installed on the second movable frame 12, and three first screens 11 and second screens 13 are arranged in a ring array, and the screening diameter of the first screen 11 is larger than the screening diameter of the second screen 13; In the technical solution of this embodiment, the PETG raw material is screened by the first screen 11, and larger impurities are left in the first movable frame 10. The screened PETG raw material enters the second movable frame 12. At this time, the second movable frame 12 is driven to rotate by the inner ring gear 22, and smaller impurities in the PETG raw material enter the bottom surface of the inner cavity of the outer shell 1, completing the screening operation of the PETG raw material; Furthermore, an annular groove 30 is provided on the left and right side walls of the inner ring 2 and the outer ring 4, and an annular plate 31 is fixedly connected to the first movable frame 10 and the second movable frame 12 near the center of the outer shell 1, and the annular plates 31 are respectively inserted into the annular grooves 30 and the annular plates 31 are movably connected to the annular grooves 30, which can ensure the stable rotation of the first movable frame 10 and the second movable frame 12; Furthermore, the inner side walls of the first movable frame 10 and the second movable frame 12 are both fixedly connected with a spiral push plate 17, and the spiral push plates 17 in the first movable frame 10 and the second movable frame 12 rotate in opposite directions, so as to realize the pushing operation of the raw materials and facilitate the screening operation of the raw materials; The first movable frame 10 and the second movable frame 12 are both provided with a screen installation assembly 14, the screen installation assembly 14 includes an arc groove, the side walls of the first movable frame 10 and the second movable frame 12 are both provided with an arc groove, a spring 15 is fixedly connected in the arc groove, the other end of the spring 15 is fixedly connected to an arc plate 16, the arc plate 16 extends out of the arc groove away from one end of the spring 15 and is respectively closely arranged with the outer walls of the first screen 11 and the second screen 13; In the technical solution of this embodiment, the operator pushes the arc plate 16, and the arc plate 16 compresses the spring 15 and is received in the arc groove. At this time, the first screen 11 is inserted into the first movable frame 10, and then the arc plate 16 is loosened. Under the push of the spring 15, the arc plate 16 extends out of the arc groove, and the first screen 11 is positioned and installed on the first movable frame 10. Repeat the above operation, the remaining first screens 11 can be installed on the first movable frame 10, and the second screen 13 can be installed on the second movable frame 12. The installation operation of the first screen 11 and the second screen 13 can be performed according to actual needs, and the screening effect is good; A rotation drive assembly 7 is provided on the left and right side walls of the outer shell 1. The rotation drive assembly 7 includes a motor 18. The motor 18 is fixedly connected to the left and right outer walls of the outer shell 1. A rotating shaft 19 is fixedly connected to the rotor of the motor 18. The end of the rotating shaft 19 away from the motor 18 passes through the outer shell 1 and is fixedly connected to a first gear 20. An outer ring gear 21 is fixedly connected to the outer wall of the first movable frame 10. An inner ring gear 22 is fixedly connected to the side wall of the second movable frame 12 away from the outer ring 4. Both sides of the first gear 20 are respectively meshed with the outer ring gear 21 and the inner ring gear 22; In the technical solution of this embodiment, the motor 18 is started, the motor 18 drives the rotating shaft 19 to rotate, the rotating shaft 19 drives the first gear 20 to rotate, the first gear 20 meshes with the outer ring gear 21 and the inner ring gear 22 on both sides to rotate, the outer ring gear 21 drives the first movable frame 10 to rotate, and the inner ring gear 22 drives the second movable frame 12 to rotate, at this time, the first screen 11 and the second screen 13 can realize the efficient screening operation of the PETG raw material; A cleaning assembly 8 is arranged in the outer shell 1, and the cleaning assembly 8 includes a transverse pipe 23. The inner cavity of the outer shell 1 is provided with the transverse pipe 23, and the transverse pipe 23 is arranged concentrically with the inner ring 2, and the two ends thereof respectively penetrate the first movable frame 10 on both sides. The transverse pipe 23 is located on the side wall of the inner cavity of the outer shell 1 and is evenly distributed and fixedly connected with a plurality of nozzles 24. Two drainage pipes 25 are symmetrically fixedly connected to the bottom surface of the outer shell 1; In the technical solution of this embodiment, during the screening process of the PETG raw materials, water is added to the horizontal pipe 23 through an external device, and the water is sprayed into the inner cavity of the outer shell 1 through the nozzle 24, so that the PETG raw materials can be screened and cleaned at the same time, which can effectively improve the pre-treatment efficiency of the PETG raw materials; A multi-layer drying assembly 9 is arranged on the bottom surface of the outer shell 1, and the multi-layer drying assembly 9 includes a fixed shell 26, which is fixedly connected to the bottom surface of the outer shell 1, and a discharge pipe 5 passes through the fixed shell 26 and is fixedly connected to the fixed shell 26. A discharge pipe 27 is fixedly connected to the bottom surface of the fixed shell 26, and a plurality of heating plates 28 are fixedly connected to the left and right side walls of the inner cavity of the fixed shell 26, and the heating plates 28 are all inclined toward the center direction of the inner cavity of the fixed shell 26. An exhaust device 32 is fixedly connected to the front side wall of the fixed shell 26, and the exhaust device 32 is arranged to penetrate the inner cavity of the fixed shell 26; In the technical solution of this embodiment, the PETG raw material is continuously heated and dried by the heating plate 28, and the exhaust device 32 is started, so that the moisture on the PETG raw material can be effectively removed, and the drying effect is good. The dried PETG raw material is input into the injection molding equipment through the discharge pipe 27, and the pre-processing operation of the PETG raw material is completed, thereby improving the quality of PETG production.

[0019] Working principle: Before use, the device is fixedly installed on the specified position of the injection molding equipment, and the external equipment for conveying PETG raw materials is installed at the appropriate position on the feed pipe 3. Then, according to the required specifications of the PETG raw materials, the first screen 11 and the second screen 13 with the specified screening diameter are selected. The operator pushes the arc plate 16, and the arc plate 16 compresses the spring 15 and is collected in the arc groove. At this time, the first screen 11 is inserted into the first movable frame 10, and then the arc plate 16 is loosened. Under the push of the spring 15, the arc plate 16 extends out of the arc groove to realize the positioning and installation of the first screen 11 on the first movable frame 10. Repeat the above operation to install the remaining first screens 11 to On the first movable frame 10, the second screen 13 is installed on the second movable frame 12, and the device is connected to an external power supply and the cross pipe 23 is connected to an external cleaning device to complete the preparation work before the use of the device. When the device is in use, the PETG raw material is transported to the feed pipe 3 through an external device, and the PETG raw material enters the inner ring 2 through the feed pipe 3. The PETG raw material moves to both sides into the first movable frame 10 under the action of the guide plate 29 to complete the feeding operation of the PETG raw material. At the same time, the motor 18 is started, and the motor 18 drives the rotating shaft 19 to rotate, and the rotating shaft 19 drives the first gear 20 to rotate. The first gear 20 meshes with the outer ring gear 21 and the inner ring gear 22 on both sides to rotate, and the outer ring gear 21 and the inner ring gear 22 on both sides rotate. The wheel 21 drives the first movable frame 10 to rotate, and the PETG raw material in the first movable frame 10 moves under the action of the spiral push plate 17, and the PETG raw material is screened through the first screen 11, and larger impurities remain in the first movable frame 10. The screened PETG raw material enters the second movable frame 12. At this time, the second movable frame 12 is driven to rotate by the inner ring gear 22, so that the PETG raw material moves under the action of the spiral push plate 17, and smaller impurities in the PETG raw material enter the bottom surface of the inner cavity of the outer shell 1, completing the screening operation of the PETG raw material, and in the process of screening the PETG raw material, water is added to the horizontal pipe 23 through an external device, and the water is sprayed out through the nozzle 24 The PETG raw material is put into the inner cavity of the outer shell 1 to realize the operation of screening and cleaning the PETG raw material, which can effectively improve the pre-treatment efficiency of the PETG raw material. The PETG raw material after screening and cleaning is continuously pushed by the spiral push plate 17 to be transported to the outer ring 4, and the PETG raw material with moisture can be input into the inner cavity of the fixed shell 26 through the discharge pipe 5. The PETG raw material is continuously heated and dried by the heating plate 28, and the exhaust device 32 is started, which can effectively remove the moisture on the PETG raw material, and the drying effect is good. The dried PETG raw material is input into the injection molding equipment through the discharge pipe 27 to complete the pre-treatment operation of the PETG raw material and improve the quality of PETG production.

[0020] All technical features in this embodiment can be freely combined according to actual needs.

[0021] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A pre-screening, cleaning and drying device for PETG extrusion molding, comprising an outer shell (1), characterized in that: An inner ring (2) is arranged at the center of the inner cavity of the outer shell (1), a feed pipe (3) is fixedly connected to the top surface of the inner ring (2), the feed pipe (3) passes through the top surface of the outer shell (1) and is fixedly connected to the outer shell (1), an outer ring (4) is concentrically arranged outside the inner ring (2), a discharge pipe (5) is fixedly connected to the bottom surface of the outer ring (4), the bottom end of the discharge pipe (5) passes through the bottom surface of the outer shell (1) and is fixedly connected to the outer shell (1), the outer ring (4) is fixedly connected to the feed pipe (3), double screening components (6) are arranged on both sides of the inner ring (2) and the outer ring (4), a rotary drive component (7) is arranged on the left and right side walls of the outer shell (1), a cleaning component (8) is arranged in the outer shell (1), and a multi-layer drying component (9) is arranged on the bottom surface of the outer shell (1).

2. A pre-screening, cleaning and drying equipment for PETG extrusion molding according to claim 1, characterized in that, The double screening component (6) comprises a first movable frame (10), the left and right sides of the inner ring (2) are movably connected to the first movable frame (10), the first movable frame (10) is movably connected to the outer shell (1) at a side away from the inner ring (2), and a plurality of first screens (11) are evenly distributed and installed on the first movable frame (10), the left and right sides of the outer ring (4) are movably connected to the second movable frame (12), the second movable frame (12) is movably connected to the first movable frame (10) at a side away from the outer ring (4), and a plurality of second screens (13) are evenly distributed and installed on the second movable frame (12), and the first movable frame (10) and the second movable frame (12) are both provided with screen installation components (14).

3. A pre-screening, cleaning and drying equipment for PETG extrusion molding according to claim 2, characterized in that, The screen installation assembly (14) comprises an arc groove, and the side walls of the first movable frame (10) and the second movable frame (12) are both provided with an arc groove, and a spring (15) is fixedly connected in each of the arc grooves, and the other end of the spring (15) is fixedly connected to an arc plate (16), and the arc plate (16) extends out of the arc groove away from one end of the spring (15) and is respectively arranged in close contact with the outer walls of the first screen (11) and the second screen (13).

4. A pre-screening, cleaning and drying equipment for PETG extrusion molding according to claim 3, characterized in that: A spiral push plate (17) is fixedly connected to the inner side walls of the first movable frame (10) and the second movable frame (12); the spiral push plates (17) in the first movable frame (10) and the second movable frame (12) rotate in opposite directions.

5. A pre-screening, cleaning and drying equipment for PETG extrusion molding according to claim 4, characterized in that: The first screen (11) and the second screen (13) are both arranged in three numbers in a ring-shaped array, and the screening diameter of the first screen (11) is larger than the screening diameter of the second screen (13).

6. A pre-screening, cleaning and drying equipment for PETG extrusion molding according to claim 5, characterized in that: The rotary drive assembly (7) comprises a motor (18), the motor (18) being fixedly connected to the outer walls on both the left and right sides of the outer shell (1), the rotor of the motor (18) being fixedly connected to a rotating shaft (19), the end of the rotating shaft (19) away from the motor (18) passing through the outer shell (1) and being fixedly connected to a first gear (20), the outer wall of the first movable frame (10) being fixedly connected to an outer ring gear (21), the side wall of the second movable frame (12) away from the outer ring (4) being fixedly connected to an inner ring gear (22), and the two sides of the first gear (20) being respectively meshed with the outer ring gear (21) and the inner ring gear (22).

7. A pre-screening, cleaning and drying equipment for PETG extrusion molding according to claim 6, characterized in that: The cleaning assembly (8) comprises a transverse tube (23), the inner cavity of the outer shell (1) is provided with the transverse tube (23), the transverse tube (23) is arranged concentrically with the inner ring (2), and the two ends of the transverse tube (23) respectively penetrate the first movable frames (10) on both sides, the transverse tube (23) is located on the side wall of the inner cavity of the outer shell (1) and is evenly distributed and fixedly connected to a plurality of nozzles (24), and two drainage pipes (25) are symmetrically fixedly connected to the bottom surface of the outer shell (1).

8. A pre-screening, cleaning and drying equipment for PETG extrusion molding according to claim 7, characterized in that: The multi-layer drying assembly (9) comprises a fixed shell (26), wherein the fixed shell (26) is fixedly connected to the bottom surface of the outer shell (1), the discharge pipe (5) passes through the fixed shell (26) and is fixedly connected to the fixed shell (26), a discharge pipe (27) is fixedly connected to the bottom surface of the fixed shell (26), a plurality of heating plates (28) are fixedly connected to the left and right side walls of the inner cavity of the fixed shell (26), and the heating plates (28) are inclined toward the center direction of the inner cavity of the fixed shell (26), and an exhaust device (32) is fixedly connected to the front side wall of the fixed shell (26), and the exhaust device (32) is arranged to pass through the inner cavity of the fixed shell (26).

9. A pre-screening, cleaning and drying equipment for PETG extrusion molding according to claim 8, characterized in that: The width of the inner ring (2) is greater than the width of the outer ring (4), and a guide plate (29) is fixedly connected to the bottom surface of the inner cavity of the inner ring (2).

10. The pre-screening, cleaning and drying equipment for PETG extrusion molding according to claim 9, characterized in that: Annular grooves (30) are provided on the left and right side walls of the inner ring (2) and the outer ring (4); annular plates (31) are fixedly connected to the first movable frame (10) and the second movable frame (12) on one side close to the center of the outer shell (1); the annular plates (31) are respectively inserted into the annular grooves (30), and the annular plates (31) are movably connected to the annular grooves (30).

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