Automatic feeding device for polyester resin production

Abstract

The invention discloses an automatic feeding device for polyester resin production, and particularly relates to the technical field of polyester resin processing, the automatic feeding device comprises an upper conveying shell and a lower conveying shell, the upper conveying shell is arranged at the top of the lower conveying shell, the length of the upper conveying shell is larger than that of the lower conveying shell, and the bottom of the upper conveying shell and the bottom of the lower conveying shell are each provided with a discharging opening; a feeding frame is arranged at the top of the upper conveying shell, a glass observation opening is formed in the surface of the feeding frame, conveying screening structures are arranged in the upper conveying shell and the lower conveying shell correspondingly, a quantitative discharging structure is arranged in the feeding frame, and a lifting conveying structure is arranged on one side of the lower conveying shell. The steps of high-position feeding, quantitative discharging, screening and conveying and the like of resin raw materials are achieved, the raw materials of different particles evenly enter processing equipment to be subjected to polyester resin processing treatment, the workload of workers is relieved, and therefore the processing efficiency of the polyester resin is improved.

Description

Technical Field

[0001] The invention relates to the technical field of polyester resin processing, and more specifically to an automatic feeding device for polyester resin production. Background Art

[0002] Polyester resin is a general term for high molecular weight compounds formed by the condensation of diols or dibasic acids or polyols and polyacids. It is used for bonding fiberglass, rigid plastics, concrete and electrical can seals, etc. During the production and processing of polyester resin, a feeding device is required to feed the raw materials into the processing equipment for processing.

[0003] Some feeding devices are disclosed in the prior art. For example, the utility model patent with patent application number CN202022202921.X discloses a feeding device for polyester resin production, including a hopper, a sieve plate and a motor. The advantage of this structure is that the raw material particles can be screened through the sieve plate to avoid the mixing of raw and cooked raw materials in the reactor, thereby affecting product quality.

[0004] However, in actual use, when the raw materials are transported to the interior of the device through the hopper, since the hopper has a certain height, the staff needs to climb to a high place with the help of tools to add materials to the hopper. Not only is the workload large, but it is also prone to danger. Moreover, after the materials are transported to the screen plate through the hopper, the materials are in a large amount of accumulation, which affects the screening effect.

[0005] Another example is the utility model of patent application number CN202120246875.5, which discloses an automatic feeding device for resin production. The structure realizes automatic feeding, reduces the labor intensity of workers, improves the degree of automation and work efficiency, and the operation process is in a closed environment. The dust-containing air is purified, which effectively protects the health of workers and the air environment.

[0006] However, when this structure is actually used, it also has the technical defects of the above-mentioned comparative documents, requiring workers to add materials at a high place, or requiring workers to carry materials to a high place for adding materials, which is inconvenient to operate.

[0007] In view of the above situation, the present invention proposes an automatic feeding device for polyester resin production Summary of the invention

[0008] In order to overcome the above defects of the prior art, the present invention provides an automatic feeding device for polyester resin production to solve the problems raised in the above background technology.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an automatic feeding device for polyester resin production, comprising an upper conveying shell and a lower conveying shell, wherein the upper conveying shell is arranged on the top of the lower conveying shell, the upper conveying shell is longer than the lower conveying shell, the bottoms of the upper conveying shell and the lower conveying shell are both provided with discharge ports, and the top of the upper conveying shell is provided with a feeding frame, and the surface of the feeding frame is provided with a glass observation port for viewing the remaining raw materials inside the feeding frame.

[0010] In order to convey and screen the resin raw materials, the large particles and small particles in the raw materials are separated and conveyed separately to avoid the different particle sizes of large and small particles affecting the reaction time of the product and improve the processing efficiency of the polyester resin. Preferably, the upper conveying shell and the lower conveying shell are both provided with a conveying and screening structure, and the conveying and screening structure includes two first motors, and the two first motors are respectively installed at one end of the upper conveying shell and the lower conveying shell. The output ends of the two first motors and the interiors of the upper conveying shell and the lower conveying shell are coaxially installed with rotating shafts, and the outside of the rotating shaft is provided with spiral conveying blades. The upper conveying shell and the lower conveying shell are both semicircular structures, and a screening net is provided on the surface of the lower conveying shell, and slide grooves are provided on the surface of the lower conveying shell on both sides of the screening net, and a slider is slidably provided inside the slide groove, and the slider is fixedly installed at the bottom of the upper conveying shell.

[0011] In order to be able to store and quantitatively discharge the raw materials and avoid a large amount of raw materials entering the interior of the upper conveying shell through the feed frame and causing accumulation, thereby affecting the conveying and screening effect of the raw materials, preferably, a quantitative discharge structure is arranged inside the feed frame, and the quantitative discharge structure comprises two L-shaped plates, and the two L-shaped plates are symmetrically installed at the two ends of the feed frame respectively, and an electric push rod is arranged on the surface of the L-shaped plate, and a baffle plate is arranged at the output end of the electric push rod, and a sliding cavity is opened through the surface of the feed frame, and the baffle plate is slidably connected to the feed frame through the sliding cavity, and a rectangular leakage groove is opened on the surface of one of the baffle plates, and a rectangular sealing block is arranged at one end of the other baffle plate, and guide grooves are opened on both inner walls of the rectangular leakage groove, and guide blocks are fixedly arranged on the front and rear surfaces of the rectangular sealing block, and the guide blocks are slidably connected inside the guide groove.

[0012] In order to facilitate the staff to load the feed frame at a high place and reduce the staff's workload, and at the same time, reduce the danger and difficulty of the staff loading materials at a high place, preferably, a lifting and conveying structure is provided on one side of the lower conveying shell, and the lifting and conveying structure includes two guide rails, both of which are on one side of the lower conveying shell, a screw rod is provided inside one of the guide rails, and a sliding rod is provided inside the other guide rail, and a moving seat is provided outside the screw rod and the sliding rod, and a second motor is provided at one end of the screw rod, and the output end of the second motor is coaxially connected to the screw rod inside one of the guide rails, and the two moving seats are respectively threaded and slidably connected to the screw rod and the sliding rod;

[0013] The lifting and conveying structure also includes two support plates, which are respectively fixedly mounted on the top of the corresponding moving seats, and the surfaces of the two support plates are provided with mounting grooves, a screw is arranged inside one of the mounting grooves, and a guide rod is arranged inside the other mounting groove, and a threaded block and a movable block are respectively arranged outside the screw and the guide rod, and a third motor is arranged at the top of the screw, and the output end of the third motor is coaxially connected to the screw inside one of the mounting grooves, and the threaded block and the movable block are connected to the screw and the guide rod in a threaded connection and a sliding connection respectively;

[0014] A fourth motor is fixedly mounted at one end of the movable block, a rotating rod is provided at the output end of the fourth motor, a quantitative cylinder is provided at one end of the rotating rod, a connecting rod is provided at one end of the quantitative cylinder, one end of the rotating rod and the connecting rod are fixedly connected to the quantitative cylinder, and the other end of the connecting rod is rotatably connected to the threaded block.

[0015] Technical effects and advantages of the present invention:

[0016] 1. By setting a conveying and screening structure, when the raw material enters the interior of the upper conveying shell, the spiral conveying blade inside the upper conveying shell rotates, so that the raw material is conveyed to one side and evenly distributed on the screening net. The screening net can screen the raw material, so that the large-particle raw material is on the screening net and is conveyed to the discharge port of the upper conveying shell through the spiral conveying blade. The small-particle raw material is screened by the screening net and is in the interior of the lower conveying shell, and is conveyed by the spiral conveying blade inside the lower conveying shell. The raw material is screened and conveyed separately, avoiding the different particle sizes of large and small particles affecting the reaction time of the product, and improving the processing efficiency of polyester resin. In addition, by pushing the upper conveying shell to one side, the slider at the bottom of the upper conveying shell slides inside the slide groove on the surface of the lower conveying shell, so that the screening net is exposed, and then the screening net is cleaned by a cleaning brush;

[0017] 2. By setting a quantitative discharge structure, two electric push rods drive the corresponding baffle plates to move relative to each other, so that the rectangular sealing block at one end of one of the baffle plates slides inside the rectangular leakage groove through the guide block and the guide groove, so that the rectangular leakage groove is opened, and then the raw materials are discharged through the rectangular leakage groove. The sliding distance of the rectangular sealing block inside the rectangular leakage groove determines the size of the rectangular leakage groove opening, and the size of the rectangular leakage groove opening determines the amount of material discharged, so as to achieve quantitative discharge of materials and avoid a large amount of raw materials from entering the upper conveying shell through the feed frame to cause accumulation, which affects the conveying and screening effect of the raw materials;

[0018] 3. By setting up a lifting and conveying structure, the third motor drives the screw inside one of the installation grooves to rotate, so that the raw material inside the metering cylinder is lifted to the same height as the feed frame, and the second motor drives the screw inside one of the guide rails to rotate, so that the two support plates move and move the metering cylinder to the top position of the feed frame. Finally, the fourth motor drives the rotating rod to rotate, so that the metering cylinder flips over and pours the raw material into the feed frame. It is convenient to pour the resin raw material into the feed frame, reduce the burden of manual feeding, and reduce the danger of staff operating at heights. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a three-dimensional schematic diagram of the lifting and conveying structure of the present invention.

[0021] Figure 3 It is a schematic diagram of the present invention when the lifting and conveying structure is not installed.

[0022] Figure 4 It is a schematic diagram of a part of the structure of the lifting and conveying structure of the present invention.

[0023] Figure 5 It is a schematic diagram of the feed frame structure of the present invention.

[0024] Figure 6 It is a schematic diagram of the connection structure between the electric push rod and the baffle plate of the present invention.

[0025] Figure 7 It is a schematic structural diagram of the upper conveying shell and the lower conveying shell of the present invention when they are separated.

[0026] Figure 8 It is a schematic diagram of the connection structure between the first motor and the rotating shaft of the present invention.

[0027] The accompanying drawings are marked as follows: 1. upper conveying shell; 2. lower conveying shell; 3. discharge port; 4. feed frame; 5. glass observation port; 6. first motor; 7. rotating shaft; 8. spiral conveying blade; 9. screening net; 10. slide groove; 11. slider; 12. L-shaped plate; 13. electric push rod; 14. blocking plate; 15. rectangular leakage groove; 16. rectangular sealing block; 17. guide groove; 18. guide block; 19. guide rail; 20. screw rod; 21. slide rod; 22. moving seat; 23. second motor; 24. support plate; 25. mounting groove; 26. screw rod; 27. guide rod; 28. threaded block; 29. ​​movable block; 30. third motor; 31. fourth motor; 32. rotating rod; 33. metering cylinder; 34. connecting rod. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] As attached Figure 1-8 An automatic feeding device for polyester resin production is shown, comprising an upper conveying shell 1 and a lower conveying shell 2, wherein the upper conveying shell 1 is arranged on the top of the lower conveying shell 2, the upper conveying shell 1 is longer than the lower conveying shell 2, a discharge port 3 is arranged at the bottom of the upper conveying shell 1 and the lower conveying shell 2, and a feeding frame 4 is arranged on the top of the upper conveying shell 1, and a glass observation port 5 is arranged on the surface of the feeding frame 4.

[0030] Specifically, in this structure, the feed frame 4 can convey the polyester resin raw material to the interior of the upper conveying shell 1, and after screening, it falls into the interior of the lower conveying shell 2. The upper conveying shell 1 conveys the large particles of polyester resin raw material and discharges them through the corresponding discharge port 3, while the small particles are discharged through the discharge port 3 belonging to the lower conveying shell 2. The resin raw material is screened before feeding to avoid different reaction times caused by different particle sizes of large and small particles, which may affect the quality of the final product.

[0031] In a specific embodiment, as shown in the attached Figure 1 , 3As shown in Figures 7 and 8, the upper conveying shell 1 and the lower conveying shell 2 are both provided with a conveying and screening structure, and the conveying and screening structure includes two first motors 6, and the two first motors 6 are respectively installed at one end of the upper conveying shell 1 and the lower conveying shell 2, and the output ends of the two first motors 6 and the interiors of the upper conveying shell 1 and the lower conveying shell 2 are coaxially installed with a rotating shaft 7, and the exterior of the rotating shaft 7 is provided with a spiral conveying blade 8. The upper conveying shell 1 and the lower conveying shell 2 are both semicircular structures, and a screening net 9 is provided on the surface of the lower conveying shell 2, and slide grooves 10 are provided on the surface of the lower conveying shell 2 on both sides of the screening net 9, and a slider 11 is slidably provided inside the slide groove 10, and the slider 11 is fixedly installed at the bottom of the upper conveying shell 1.

[0032] Specifically, as a conveying and screening structure in the present technical solution, this structure can separately convey and process resin raw materials of different particle sizes. Specifically, when the raw materials enter the interior of the upper conveying shell 1, the first motor 6 at one end of the upper conveying shell 1 is first driven to rotate the rotating shaft 7 and drive the spiral conveying blade 8 to rotate. The rotation of the spiral conveying blade 8 conveys the raw materials to one side. In this process, the raw materials can be evenly distributed on the screening net 9. The screening net 9 can screen the raw materials so that large particles of raw materials are on the screening net 9 and are transported to the discharge port 3 of the upper conveying shell 1 through the spiral conveying blade 8 for discharge.

[0033] At the same time, the small-particle raw materials are screened by the screening net 9 and are placed inside the lower conveying shell 2. At this time, the first motor 6 at one end of the lower conveying shell 2 drives the spiral conveying blade 8 to rotate, and the small-particle raw materials are discharged through the discharge port 3 at one end of the lower conveying shell 2, thereby achieving the goal of screening the small-particle and large-particle raw materials and conveying them separately, avoiding the different particle sizes of the large-particle and small-particle raw materials affecting the reaction time of the product, and improving the processing efficiency of the polyester resin;

[0034] When the screening net 9 needs to be cleaned, the staff can push the upper conveying shell 1 to one side so that the slider 11 at the bottom of the upper conveying shell 1 slides inside the slide groove 10 on the surface of the lower conveying shell 2, so that the screening net 9 is exposed, and then the screening net 9 is cleaned with a cleaning brush.

[0035] In a specific embodiment, as shown in the attached Figure 1 , 3As shown in Figures 5 and 6, a quantitative discharging structure is provided inside the feed frame 4, and the quantitative discharging structure includes two L-shaped plates 12, which are symmetrically mounted at the two ends of the feed frame 4 respectively, and an electric push rod 13 is provided on the surface of the L-shaped plate 12, and a blocking plate 14 is provided at the output end of the electric push rod 13. A sliding cavity is provided on the surface of the feed frame 4, and the blocking plate 14 is slidably connected to the feed frame 4 through the sliding cavity. A rectangular leakage groove 15 is provided on the surface of one of the blocking plates 14, and a rectangular sealing block 16 is provided at one end of the other blocking plate 14. Guide grooves 17 are provided on both inner walls of the rectangular leakage groove 15, and guide blocks 18 are fixedly provided on the front and rear surfaces of the rectangular sealing block 16, and the guide blocks 18 are slidably connected inside the guide groove 17.

[0036] Specifically, this structure, as a quantitative discharging structure in the present technical solution, can store and quantitatively discharge raw materials, and prevent a large amount of raw materials from entering the upper conveying shell 1 through the feed frame 4, affecting the conveying and screening effect of the raw materials. Specifically, when the raw materials are in the feed frame 4, the two baffle plates 14 are in a closed state. At this time, the raw materials can be temporarily stored in the feed frame 4. When quantitative discharge is required, the two electric push rods 13 drive the corresponding baffle plates 14 to move relative to each other, so that the rectangular sealing block 16 at one end of one of the baffle plates 14 slides inside the rectangular leakage groove 15 through the guide block 18 and the guide groove 17, so that the rectangular leakage groove 15 opens, and then the raw materials are discharged through the rectangular leakage groove 15, and the sliding distance of the rectangular sealing block 16 inside the rectangular leakage groove 15 determines the size of the opening of the rectangular leakage groove 15, and the size of the opening of the rectangular leakage groove 15 determines the amount of material discharged, thereby achieving quantitative discharge of the material.

[0037] In a specific embodiment, as shown in the attached Figure 1 , 2 As shown in , 4, a lifting and conveying structure is provided on one side of the lower conveying shell 2, and the lifting and conveying structure includes two guide rails 19, and the two guide rails 19 are both located on one side of the lower conveying shell 2, a screw rod 20 is provided inside one of the guide rails 19, and a slide rod 21 is provided inside the other guide rail 19, and a moving seat 22 is provided outside the screw rod 20 and the slide rod 21, and a second motor 23 is provided at one end of the screw rod 20, and the output end of the second motor 23 is coaxially connected to the screw rod 20 inside one of the guide rails 19, and the two moving seats 22 are respectively threaded and slidably connected to the screw rod 20 and the slide rod 21;

[0038] The lifting and conveying structure also includes two support plates 24, which are fixedly mounted on the top of the corresponding moving seat 22, and the surfaces of the two support plates 24 are provided with mounting grooves 25, wherein a screw 26 is arranged inside one of the mounting grooves 25, and a guide rod 27 is arranged inside the other mounting groove 25, and a threaded block 28 and a movable block 29 are arranged outside the screw 26 and the guide rod 27, respectively, and a third motor 30 is arranged at the top of the screw 26, and the output end of the third motor 30 is coaxially connected to the screw 26 inside one of the mounting grooves 25, and the threaded block 28 and the movable block 29 are connected to the screw 26 and the guide rod 27 by threaded connection and sliding connection, respectively;

[0039] A fourth motor 31 is fixedly mounted at one end of the movable block 29, a rotating rod 32 is provided at the output end of the fourth motor 31, a metering cylinder 33 is provided at one end of the rotating rod 32, a connecting rod 34 is provided at one end of the metering cylinder 33, one end of the rotating rod 32 and the connecting rod 34 are fixedly connected to the metering cylinder 33, and the other end of the connecting rod 34 is rotatably connected to the threaded block 28.

[0040] Specifically, as the lifting and conveying structure in the present technical solution, this structure can conveniently pour the resin raw material into the inside of the feed frame 4, reducing the burden of manual feeding. Specifically, the staff can first add the resin raw material into the inside of the quantitative cylinder 33 at a low position, and the quantitative cylinder 33 quantifies the raw material. After the raw material inside the quantitative cylinder 33 is added, first, the third motor 30 drives the screw 26 inside one of the mounting grooves 25 to rotate, so that the threaded block 28 extends upward outside the screw 26, and drives the movable block 29 to slide on the outside of the guide rod 27. At this time, the raw material inside the quantitative cylinder 33 is lifted to the same height as the feed frame 4;

[0041] Next, the second motor 23 drives the screw 20 inside one of the guide rails 19 to rotate, so that the two moving seats 22 move toward the feed frame 4. The movement of the moving seats 22 drives the support plate 24 on the top thereof to move, thereby realizing that the metering cylinder 33 moves to the top position of the feed frame 4.

[0042] Finally, the fourth motor 31 is used to drive the rotating rod 32 to rotate, so that the rotating rod 32 drives the metering cylinder 33 to flip, and drives one end of the connecting rod 34 and the threaded block 28 to rotate. After the metering cylinder 33 is flipped, the raw materials inside the metering cylinder 33 can be poured into the inside of the feed frame 4, thereby achieving the effect of loading materials into the feed frame 4. This structure can reduce the burden of loading materials on the staff and avoid the staff from carrying materials to a high place to load the feed frame 4.

[0043] Working principle of the present invention:

[0044] The working principle and operation steps of the above structure are described in detail below;

[0045] When polyester resin is produced, the resin raw materials need to be processed, and a feeding device is often used to feed the material into the processing device, and then the feeding device is installed at the use position of the processing device;

[0046] The user adds the resin raw material into the inside of the quantitative cylinder 33 at a low position, and uses the third motor 30 to drive the screw 26 inside one of the mounting grooves 25 to rotate, so that the raw material inside the quantitative cylinder 33 is lifted to the same height as the feed frame 4, and the second motor 23 drives the screw 20 inside one of the guide rails 19 to rotate, so that the two support plates 24 move, and the quantitative cylinder 33 is moved to the top position of the feed frame 4, and finally the fourth motor 31 drives the rotating rod 32 to rotate, so that the quantitative cylinder 33 is turned over and the raw material is poured into the inside of the feed frame 4;

[0047] After the raw materials enter the feed frame 4, the two baffle plates 14 inside the feed frame 4 are in a closed state. At this time, the raw materials can be temporarily stored inside the feed frame 4, and the raw materials are quantitatively discharged into the upper conveying shell 1. The two electric push rods 13 are used to drive the corresponding baffle plates 14 to move relatively, so that the rectangular sealing block 16 at one end of one of the baffle plates 14 slides inside the rectangular leakage groove 15 through the guide block 18 and the guide groove 17, so that the rectangular leakage groove 15 is opened, and then the raw materials are discharged through the rectangular leakage groove 15, and the sliding distance of the rectangular sealing block 16 inside the rectangular leakage groove 15 determines the size of the opening of the rectangular leakage groove 15, and the size of the opening of the rectangular leakage groove 15 determines the amount of material discharged, so as to achieve quantitative discharge of the material;

[0048] After the raw materials are quantitatively transported to the interior of the upper conveying shell 1, the first motor 6 at one end of the upper conveying shell 1 is driven to rotate the rotating shaft 7 and drive the spiral conveying blade 8 to rotate. The rotation of the spiral conveying blade 8 transports the raw materials to one side, so that the raw materials can be evenly distributed on the screening net 9. The screening net 9 can screen the raw materials so that large particles of the raw materials are on the screening net 9 and are transported to the discharge port 3 of the upper conveying shell 1 through the spiral conveying blade 8 for discharge;

[0049] The small particles of raw materials are screened by the screening net 9 and are placed inside the lower conveying shell 2. The first motor 6 at one end of the lower conveying shell 2 drives the spiral conveying blade 8 to rotate, and the small particles of raw materials are discharged through the discharge port 3 at one end of the lower conveying shell 2.

[0050] When the staff needs to clean the screening net 9, they push the upper conveying shell 1 to one side, so that the slider 11 at the bottom of the upper conveying shell 1 slides inside the slide groove 10 on the surface of the lower conveying shell 2, so that the screening net 9 is exposed, and then the screening net 9 is cleaned with a cleaning brush.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic feeding device for polyester resin production, comprising an upper conveying shell (1) and a lower conveying shell (2), wherein the upper conveying shell (1) is arranged on the top of the lower conveying shell (2), characterized in that: The upper conveying shell (1) is longer than the lower conveying shell (2); the bottoms of the upper conveying shell (1) and the lower conveying shell (2) are both provided with discharge ports (3); the top of the upper conveying shell (1) is provided with a feed frame (4); the surface of the feed frame (4) is provided with a glass observation port (5); The upper conveying shell (1) and the lower conveying shell (2) are both provided with conveying and screening structures inside; A quantitative discharge structure is arranged inside the feed frame (4); A lifting and conveying structure is provided on one side of the lower conveying shell (2).

2. The automatic feeding device for polyester resin production according to claim 1, characterized in that: The conveying and screening structure comprises two first motors (6), the two first motors (6) being respectively mounted at one end of an upper conveying shell (1) and a lower conveying shell (2), the output ends of the two first motors (6) being coaxially mounted with a rotating shaft (7) located inside the upper conveying shell (1) and the lower conveying shell (2), the outside of the rotating shaft (7) being provided with a spiral conveying blade (8), the upper conveying shell (1) and the lower conveying shell (2) both being semicircular structures, and a screening net (9) being provided on the surface of the lower conveying shell (2).

3. The automatic feeding device for polyester resin production according to claim 1, characterized in that: The surface of the lower conveying shell (2) is provided with slide grooves (10) on both sides of the screening net (9), and a slider (11) is slidably arranged inside the slide groove (10), and the slider (11) is fixedly installed on the bottom of the upper conveying shell (1).

4. The automatic feeding device for polyester resin production according to claim 1, characterized in that: The quantitative discharging structure comprises two L-shaped plates (12), the two L-shaped plates (12) are symmetrically mounted at the two ends of a feed frame (4), an electric push rod (13) is arranged on the surface of the L-shaped plate (12), a blocking plate (14) is arranged at the output end of the electric push rod (13), a sliding cavity is penetrated through the surface of the feed frame (4), and the blocking plate (14) is slidably connected to the feed frame (4) through the sliding cavity.

5. The automatic feeding device for polyester resin production according to claim 4, characterized in that: A rectangular leakage groove (15) is provided on the surface of one of the blocking plates (14), a rectangular sealing block (16) is provided at one end of the other blocking plate (14), guide grooves (17) are provided on both inner walls of the rectangular leakage groove (15), and guide blocks (18) are fixedly provided on the front and rear surfaces of the rectangular sealing block (16), and the guide blocks (18) are slidably connected inside the guide groove (17).

6. The automatic feeding device for polyester resin production according to claim 1, characterized in that: The lifting and conveying structure comprises two guide rails (19), both of which are located on one side of the lower conveying shell (2), a screw rod (20) is arranged inside one of the guide rails (19), a sliding rod (21) is arranged inside the other guide rail (19), a movable seat (22) is arranged outside the screw rod (20) and the sliding rod (21), and a second motor (23) is arranged at one end of the screw rod (20).

7. The automatic feeding device for polyester resin production according to claim 6, characterized in that: The output end of the second motor (23) is coaxially connected to a screw rod (20) inside one of the guide rails (19), and the two movable seats (22) are respectively threadedly connected and slidably connected to the screw rod (20) and the slide rod (21).

8. The automatic feeding device for polyester resin production according to claim 1, characterized in that: The lifting and conveying structure also includes two support plates (24), the two support plates (24) are respectively fixedly mounted on the top of the corresponding moving seat (22), and the surfaces of the two support plates (24) are provided with mounting grooves (25), one of the mounting grooves (25) is provided with a screw rod (26), and the other mounting groove (25) is provided with a guide rod (27), the outside of the screw rod (26) and the guide rod (27) are respectively provided with a threaded block (28) and a movable block (29), and the top of the screw rod (26) is provided with a third motor (30).

9. The automatic feeding device for polyester resin production according to claim 8, characterized in that: The output end of the third motor (30) is coaxially connected to a screw rod (26) inside one of the mounting grooves (25), and the threaded block (28) and the movable block (29) are connected to the screw rod (26) and the guide rod (27) by threaded connection and sliding connection respectively.

10. The automatic feeding device for polyester resin production according to claim 8, characterized in that: A fourth motor (31) is fixedly mounted on one end of the movable block (29); a rotating rod (32) is provided at the output end of the fourth motor (31); a quantitative cylinder (33) is provided at one end of the rotating rod (32); a connecting rod (34) is provided at one end of the quantitative cylinder (33); one end of the rotating rod (32) and the connecting rod (34) are both fixedly connected to the quantitative cylinder (33), and the other end of the connecting rod (34) is rotatably connected to the threaded block (28).

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