A leak-proof feeding device for plastic machinery production

Abstract

This invention discloses a leak-proof feeding device for plastic machinery production, comprising a feeding bin, a feed hopper fixedly installed on the top of the feeding bin, a mounting frame fixedly installed on the left side of the feeding bin, an automatic feeding mechanism provided on the inner top of the mounting frame, a second hinge seat fixedly installed on the left side of the feeding bin, a rotating rod rotatably installed on the inner side of the second hinge seat, connecting seats fixedly installed on both the front and back of the rotating rod, a baffle plate fixedly installed at the bottom of the connecting seat, a locking mechanism provided on the right side of the feeding bin, and a weighing and metering mechanism provided at the bottom of the feeding bin. This invention controls the opening angle of the baffle plate by controlling the extension length of the hydraulic cylinder output end, thereby controlling the discharge speed of the raw material during unloading from the feeding bin, thus preventing the raw material from being discharged too quickly and causing scattered splashing.

Description

Technical Field

[0001] This invention relates to the field of plastic production technology, specifically to a leak-proof feeding device for plastic machinery production. Background Technology

[0002] Plastics are polymeric compounds formed by polymerization of monomers through addition or condensation reactions. They possess moderate resistance to deformation, falling between that of fibers and rubber, and are composed of synthetic resins and additives such as fillers, plasticizers, stabilizers, lubricants, and colorants. During the production and processing of plastics, raw materials need to be automatically fed into a processing reactor for processing.

[0003] In existing technologies, when feeding plastic raw materials, it is difficult to control the opening angle of the baffle plate at the bottom of the hopper when feeding. This results in the raw material being discharged too quickly during unloading, causing the raw material inside the hopper to scatter and splash. Furthermore, existing plastic feeding devices cannot control the weight of the raw material inside the hopper during use, making it difficult to control the weight of the feeding. Therefore, it is necessary to invent a leak-proof feeding device for plastic machinery production to solve the above problems.

[0004] Therefore, it is essential to design a leak-proof feeding device for plastic machinery production that is both practical and easy to control the feeding weight. Summary of the Invention

[0005] The purpose of this invention is to provide a leak-proof feeding device for plastic machinery production, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a leak-proof feeding device for plastic machinery production, comprising a feeding bin, a feeding hopper fixedly installed on the top of the feeding bin, an mounting frame fixedly installed on the left side of the feeding bin, an automatic feeding mechanism provided on the inner side of the top of the mounting frame, a second hinge seat fixedly installed on the left side of the feeding bin, a rotating rod rotatably installed on the inner side of the second hinge seat, connecting seats fixedly installed on both the front and back of the rotating rod, a baffle plate fixedly installed at the bottom of the connecting seat, a locking mechanism provided on the right side of the feeding bin, and a weighing and metering mechanism provided at the bottom of the feeding bin.

[0007] The automatic feeding mechanism includes a fixed cylinder, which is fixedly installed on the front of the feeding hopper. A rotating frame is rotatably installed on the front of the fixed cylinder. A counterweight wheel is fixedly installed on the back of the right end of the rotating frame. A first pressing wheel is provided on the front of the left end of the rotating frame. An installation plate is fixedly installed on the front of the baffle plate. A fixed shaft is fixedly installed on the front of the installation plate. A fixed frame is fixedly installed on the front of the fixed shaft. A first hinge seat is fixedly installed on the inner side of the right end of the installation frame. A hydraulic cylinder is hingedly installed on the right side of the first hinge seat. A push frame is hingedly installed at the output end of the hydraulic cylinder. A rotating seat is fixedly installed on the inner side of the back of the installation frame. A rotating shaft is rotatably installed on the front of the rotating seat. A fixed body is fixedly installed on the inner top of the installation frame. A pressing frame is fixedly installed at the end of the rotating shaft away from the rotating seat. A second pressing wheel is provided at the end of the pressing frame away from the rotating shaft.

[0008] According to the above technical solution, the right side of the fixed frame is an arc-shaped structure, and the first pressing wheel is rolled and installed on the right side of the arc-shaped structure, while the second pressing wheel is rolled and installed on the top left side of the rotating frame, so that the second pressing wheel can press the rotating frame to rotate.

[0009] According to the above technical solution, the push frame is fixedly installed on the outside of the rotating shaft, and a through hole is opened at the corresponding position of the fixed body and the rotating shaft, and the rotating shaft is rotatably installed in the through hole, so that the push frame can drive the rotating shaft to support rotation.

[0010] According to the above technical solution, the locking mechanism includes a connecting rod, which is fixedly installed on the top right side of the baffle plate. A connecting block is fixedly installed at the end of the connecting rod away from the baffle plate. A sliding frame is fixedly installed on the right side of the feeding bin. A limit rod is fixedly installed on the inner side of the sliding frame. A sliding table is slidably installed on the outer side of the limit rod. A rotating plate is rotatably installed on the right side of the sliding table. A rotating connecting rod is rotatably installed between the right side of the rotating plate and the right side of the sliding table. A plug-in shaft is fixedly installed on the outer side of the sliding table to facilitate locking of the baffle plate and prevent accidental opening when adding raw materials to the feeding bin.

[0011] According to the above technical solution, there are two sliding platforms. A through hole is opened at the corresponding position of the sliding platform and the limiting rod, and the limiting rod passes through the through hole. An installation groove is opened on the inner side of the sliding platform near the front. A cylinder is fixedly installed inside the installation groove. A pneumatic push rod is fixedly installed on the back of the cylinder, and the end of the pneumatic push rod away from the cylinder is fixedly installed inside the sliding frame to facilitate the cylinder to drive the sliding platform to slide.

[0012] According to the above technical solution, there are two rotating connecting rods, and the two rotating connecting rods are installed in opposite directions. A connecting pin is provided on the right side of the rotating plate and the sliding table, and the rotating connecting rod is sleeved on the outside of the connecting pin, so that the sliding tables on both sides can rotate synchronously in opposite directions.

[0013] According to the above technical solution, the sliding frame and the corresponding positions of the connecting block and the plug shaft are provided with through holes, and the plug shaft passes through the through holes to facilitate fixing the connecting block through the plug shaft.

[0014] According to the above technical solution, the weighing and measuring mechanism includes a mounting frame, which is fixedly installed at the bottom of the baffle plate. A cover plate is fixedly installed at the bottom of the mounting frame. Limiting blocks are fixedly installed on the inner walls of the front and back of the mounting frame. A pressing block is slidably installed on the inner side of the limiting block. A pressing shaft is fixedly installed on the top of the pressing block. A weighing plate is fixedly installed on the top of the pressing shaft. There are three pressing shafts in total. Through holes are opened at the corresponding positions of the baffle plate and the pressing shaft, and the pressing shaft passes through the through holes to facilitate the transfer of the gravity on the weighing plate through the baffle plate to the pressing block.

[0015] According to the above technical solution, a third hinge seat is fixedly installed on both the left and right sides of the pressing block. A pressing push rod is hingedly installed on the outer side of the third hinge seat. A fourth hinge seat is hingedly installed at the end of the pressing push rod away from the third hinge seat. Grooves are opened on the left and right sides of the mounting frame at the corresponding positions of the fourth hinge seat. The fourth hinge seat is inserted into the groove. A pressure sensor is fixedly installed between the inner wall of the groove and the outer end face of the fourth hinge seat, so as to facilitate the detection of the weight of the plastic raw material inside the feeding bin by the pressure sensor.

[0016] According to the above technical solution, a limiting cylinder is fixedly installed on the top of the cover plate, a limiting shaft is fixedly installed on the bottom of the pressing block, and the end of the limiting shaft away from the pressing block is inserted into the inside of the limiting cylinder. A fixing spring is fixedly installed inside the limiting cylinder to facilitate the bottom cover plate to be positioned and installed at the bottom of the mounting frame.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0018] 1. This invention involves adding plastic raw materials into the feeding bin via a feeding hopper. The plastic raw materials press down on a weighing plate, which in turn presses down on a pressing shaft. The pressing shaft passes through a baffle plate and presses down on a pressing block. The pressing block transmits pressure to a pressing push rod via a third hinge seat. The pressing push rod then presses a pressure sensor outward via a fourth hinge seat. The pressure sensor detects the weight of the raw materials in the feeding bin, thus facilitating the monitoring of the weight of the raw materials inside the feeding bin. This allows for easier control of the weight of the raw materials during feeding, preventing excessive or insufficient feeding that could affect the production quality of the plastic.

[0019] 2. In this invention, the pneumatic push rod is retracted by a cylinder, causing the cylinder to drive the sliding table to slide inward on the limit rod. The sliding table then drives a rotating plate to rotate via a rotating connecting rod. This rotating plate drives another rotating connecting rod to rotate, which in turn drives the sliding table on the other side to slide inward synchronously. This causes the sliding table to drive the insertion shaft to slide inward, separating the insertion shaft from the connecting block and thus unlocking the baffle. To lock the baffle, simply release the pneumatic push rod from the cylinder, causing the insertion shaft to slide outward and re-insert into the connecting block. This allows the connecting block to fix and lock the baffle via the connecting rod, preventing the baffle from opening accidentally.

[0020] 3. In this invention, a hydraulic cylinder pushes the output end to extend, causing it to rotate the push frame. The push frame drives the rotating shaft to rotate on the rotating seat, which in turn drives the pressure frame to rotate. The pressure frame, through a second pressure wheel, presses the rotating frame, causing it to rotate on the fixed cylinder. This causes the left side of the rotating frame to press down, and the rotating frame, through a first pressure wheel on the left side, drives the fixed frame to rotate. The fixed frame then drives the baffle plate to rotate, which opens via the connecting seat and the rotating rod. This allows the raw materials inside the feeding hopper to be discharged. During use, the extension length of the hydraulic cylinder output end is controlled to control the opening angle of the baffle plate. By controlling the opening angle of the baffle plate, the discharge speed of the raw materials during unloading from the feeding hopper is controlled, thereby preventing the raw materials from being discharged too quickly and causing scattering and splashing. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the left-side appearance structure of the present invention;

[0024] Figure 3 This is a top view sectional view of the feeding bin and connected mechanism of the present invention;

[0025] Figure 4 This is a top sectional view of the mounting frame and connected mechanism of the present invention;

[0026] Figure 5 This is a schematic diagram of the external structure of the locking mechanism of the present invention;

[0027] Figure 6 This is a front cross-sectional view of the present invention;

[0028] Figure 7This is the invention Figure 6 Enlarged schematic diagram of the structure at point A in the middle;

[0029] Figure 8 This is a schematic cross-sectional view of the front structure of the weighing and measuring mechanism of the present invention.

[0030] Figure 9 This is the invention Figure 8 Enlarged schematic diagram of the structure at point B.

[0031] In the diagram: 1. Feeding bin; 2. Feed hopper; 3. Baffle plate; 4. Mounting frame; 5. Automatic feeding mechanism; 51. Fixed cylinder; 52. Rotating frame; 53. Counterweight wheel; 54. First pressing wheel; 55. Mounting plate; 56. Fixed shaft; 57. Fixed frame; 58. First hinge seat; 59. Hydraulic cylinder; 510. Push frame; 511. Rotating seat; 512. Rotating shaft; 513. Fixed body; 514. Pressing frame; 515. Second pressing wheel; 6. Second hinge seat; 61. Rotating rod; 62. Connecting seat; 7. Locking mechanism; 71. Connecting rod; 72. Connecting block; 73. Sliding frame; 74. Limiting rod; 75. Sliding table; 76. Rotating plate; 77. Rotating connecting rod; 78. Insertion shaft; 79. Cylinder; 710. Pneumatic push rod; 8. Weighing and measuring mechanism; 81. Mounting frame; 82. Cover plate; 83. Limiting block; 84. Pressing block; 85. Pressing shaft; 86. Weighing plate; 87. Third hinge seat; 88. Pressing push rod; 89. Fourth hinge seat; 810. Pressure sensor; 811. Limiting cylinder; 812. Limiting shaft; 813. Fixed spring. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1:

[0034] Please see Figure 1-4The present invention provides a technical solution: a leak-proof feeding device for plastic machinery production, including a feeding bin 1, a feeding hopper 2 fixedly installed on the top of the feeding bin 1, an mounting frame 4 fixedly installed on the left side of the feeding bin 1, an automatic feeding mechanism 5 provided on the inner side of the top of the mounting frame 4, a second hinge seat 6 fixedly installed on the left side of the feeding bin 1, a rotating rod 61 rotatably installed on the inner side of the second hinge seat 6, a connecting seat 62 fixedly installed on both the front and back of the rotating rod 61, a baffle plate 3 fixedly installed at the bottom of the connecting seat 62, a locking mechanism 7 provided on the right side of the feeding bin 1, and a weighing and metering mechanism 8 provided at the bottom of the feeding bin 1.

[0035] The automatic feeding mechanism 5 includes a fixed cylinder 51, which is fixedly installed on the front of the feeding bin 1. A rotating frame 52 is rotatably mounted on the front of the fixed cylinder 51. A counterweight wheel 53 is fixedly mounted on the back of the right end of the rotating frame 52. A first pressing wheel 54 is provided on the front of the left end of the rotating frame 52. A mounting plate 55 is fixedly mounted on the front of the baffle plate 3. A fixed shaft 56 is fixedly mounted on the front of the mounting plate 55. A fixed frame 57 is fixedly mounted on the front of the fixed shaft 56. A first hinge is fixedly mounted on the inner side of the right end of the mounting frame 4. The first hinged seat 58 has a hydraulic cylinder 59 hinged to its right side. The output end of the hydraulic cylinder 59 is hinged to a pusher frame 510. The inner back of the mounting frame 4 has a rotating seat 511 fixedly installed. The front of the rotating seat 511 has a rotating shaft 512 rotatably installed. The inner top of the mounting frame 4 has a fixed body 513 fixedly installed. The end of the rotating shaft 512 away from the rotating seat 511 has a pressing frame 514 fixedly installed. The end of the pressing frame 514 away from the rotating shaft 512 has a second pressing wheel 515.

[0036] Furthermore, the right side of the fixed frame 57 has an arc-shaped structure, and the first pressing wheel 54 is rolled on the right side of the arc-shaped structure, while the second pressing wheel 515 is rolled on the top left side of the rotating frame 52, so that the second pressing wheel 515 can press the rotating frame 52 to rotate.

[0037] Furthermore, the push frame 510 is fixedly installed on the outside of the rotating shaft 512. The fixing body 513 has a through hole at the corresponding position of the rotating shaft 512, and the rotating shaft 512 is rotatably installed in the through hole, so that the push frame 510 can drive the rotating shaft 512 to support the rotation.

[0038] Example 2:

[0039] Please see Figure 5Furthermore, in conjunction with Embodiment 1, the locking mechanism 7 includes a connecting rod 71, which is fixedly installed on the top right side of the baffle plate 3. A connecting block 72 is fixedly installed at the end of the connecting rod 71 away from the baffle plate 3. A sliding frame 73 is fixedly installed on the right side of the feeding bin 1. A limit rod 74 is fixedly installed on the inner side of the sliding frame 73. A sliding table 75 is slidably installed on the outer side of the limit rod 74. A rotating piece 76 is rotatably installed on the right side of the sliding table 75. A rotating connecting rod 77 is rotatably installed between the right side of the rotating piece 76 and the right side of the sliding table 75. A plug-in shaft 78 is fixedly installed on the outer side of the sliding table 75 to facilitate locking of the baffle plate 3 and prevent accidental opening when adding raw materials to the feeding bin 1.

[0040] Furthermore, there are two sliding tables 75. A through hole is provided at the corresponding position of the sliding table 75 and the limiting rod 74, and the limiting rod 74 passes through the through hole. An installation groove is provided on the inner side of the sliding table 75 near the front. A cylinder 79 is fixedly installed inside the installation groove. A pneumatic push rod 710 is fixedly installed on the back of the cylinder 79, and the end of the pneumatic push rod 710 away from the cylinder 79 is fixedly installed inside the sliding frame 73, so that the cylinder 79 can drive the sliding table 75 to slide.

[0041] Furthermore, there are two rotating connecting rods 77, and the two rotating connecting rods 77 are installed in opposite directions. The right side of the rotating plate 76 and the sliding table 75 is provided with a connecting pin, and the rotating connecting rod 77 is sleeved on the outside of the connecting pin, so that the sliding tables 75 on both sides can rotate synchronously in opposite directions.

[0042] Furthermore, through holes are provided at the corresponding positions of the sliding frame 73, the connecting block 72, and the plug shaft 78, and the plug shaft 78 passes through the through holes to facilitate fixing the connecting block 72 through the plug shaft 78.

[0043] Example 3:

[0044] Please see Figure 6-9 Furthermore, in conjunction with Embodiment 1 and Embodiment 2, the weighing and measuring mechanism 8 includes a mounting frame 81, which is fixedly installed at the bottom of the baffle plate 3. A cover plate 82 is fixedly installed at the bottom of the mounting frame 81. Limiting blocks 83 are fixedly installed on the inner walls of the front and back of the mounting frame 81. A pressing block 84 is slidably installed on the inner side of the limiting block 83. A pressing shaft 85 is fixedly installed on the top of the pressing block 84. A weighing plate 86 is fixedly installed on the top of the pressing shaft 85. There are three pressing shafts 85 in total. Through holes are opened at the corresponding positions of the baffle plate 3 and the pressing shaft 85, and the pressing shaft 85 passes through the through holes to facilitate the transfer of the gravity on the weighing plate 86 through the baffle plate 3 to the pressing block 84.

[0045] Furthermore, a third hinge seat 87 is fixedly installed on both the left and right sides of the pressing block 84. A pressing push rod 88 is hingedly installed on the outer side of the third hinge seat 87. A fourth hinge seat 89 is hingedly installed on the end of the pressing push rod 88 away from the third hinge seat 87. Grooves are provided on the left and right sides of the mounting frame 81 at the corresponding positions of the fourth hinge seat 89. The fourth hinge seat 89 is inserted into the groove. A pressure sensor 810 is fixedly installed between the inner wall of the groove and the outer end face of the fourth hinge seat 89, so as to facilitate the detection of the weight of the plastic raw material inside the feeding bin 1 by the pressure sensor 810.

[0046] Furthermore, a limiting cylinder 811 is fixedly installed on the top of the cover plate 82, and a limiting shaft 812 is fixedly installed on the bottom of the pressing block 84. The end of the limiting shaft 812 away from the pressing block 84 is inserted into the inside of the limiting cylinder 811. A fixing spring 813 is fixedly installed inside the limiting cylinder 811 to facilitate the positioning of the bottom cover plate 82 at the bottom of the mounting frame 81.

[0047] In actual operation, when this device is used, plastic raw materials are added into the feeding bin 1 through the feeding hopper 2, which causes the plastic raw materials to press down on the weighing plate 86, which in turn presses down on the pressing shaft 85. The pressing shaft 85 passes through the baffle plate 3 and presses down on the pressing block 84. The pressing block 84 transmits pressure to the pressing push rod 88 through the third hinge seat 87, which in turn presses the pressure sensor 810 outward through the fourth hinge seat 89. The pressure sensor 810 detects the weight of the raw materials in the feeding bin 1, which facilitates monitoring the weight of the raw materials inside the feeding bin 1 and thus helps control the weight of the raw materials during feeding, preventing excessive or insufficient feeding from affecting the production quality of the plastic.

[0048] The pneumatic push rod 710 is retracted by the cylinder 79, causing the cylinder 79 to drive the sliding table 75 to slide inward on the limit rod 74. The sliding table 75 drives the rotating plate 76 to rotate via the rotating connecting rod 77. The rotating plate 76 drives another rotating connecting rod 77 to rotate, causing the other rotating connecting rod 77 to drive the sliding table 75 on the other side to slide inward synchronously. This causes the sliding table 75 to drive the insertion shaft 78 to slide inward, separating the insertion shaft 78 from the connecting block 72, thereby unlocking the baffle plate 3. When locking, simply release the pneumatic push rod 710 by the cylinder 79, which will cause the insertion shaft 78 to slide outward and re-insert into the connecting block 72. This allows the connecting block 72 to fix and lock the baffle plate 3 via the connecting rod 71, preventing the baffle plate 3 from opening accidentally.

[0049] The hydraulic cylinder 59 pushes the output end to extend, causing it to push the push frame 510 to rotate. The push frame 510 drives the rotating shaft 512 to rotate on the rotating seat 511. The rotating shaft 512 drives the pressing frame 514 to rotate. The pressing frame 514 presses the rotating frame 52 through the second pressing wheel 515, causing the rotating frame 52 to rotate on the fixed cylinder 51. This causes the left side of the rotating frame 52 to press down, causing the rotating frame 52 to drive the fixed frame 57 to rotate through the first pressing wheel 54 on the left side. The fixed frame 57 drives the baffle plate 3 to rotate, causing the baffle plate 3 to rotate and open through the connecting seat 62 and the rotating rod 61. This allows the raw materials inside the feeding bin 1 to be discharged. During use, the extension length of the hydraulic cylinder 59's output end is controlled to control the opening angle of the baffle plate 3. By controlling the opening angle of the baffle plate 3, the discharge speed of the raw materials when unloading from the feeding bin 1 is controlled, thereby preventing the raw materials from being discharged too quickly and causing scattering and splashing.

[0050] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0051] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A leak-proof feeding device for plastic machinery production, comprising a feeding hopper (1), characterized in that: A feeding hopper (2) is fixedly installed on the top of the feeding bin (1). A mounting frame (4) is fixedly installed on the left side of the feeding bin (1). An automatic feeding mechanism (5) is provided on the inner side of the top of the mounting frame (4). A second hinge seat (6) is fixedly installed on the left side of the feeding bin (1). A rotating rod (61) is rotatably installed on the inner side of the second hinge seat (6). A connecting seat (62) is fixedly installed on both the front and back of the rotating rod (61). A baffle plate (3) is fixedly installed at the bottom of the connecting seat (62). A locking mechanism (7) is provided on the right side of the feeding bin (1). A weighing and metering mechanism (8) is provided at the bottom of the feeding bin (1). The automatic feeding mechanism (5) includes a fixed cylinder (51), which is fixedly installed on the front of the feeding bin (1). A rotating frame (52) is rotatably installed on the front of the fixed cylinder (51). A counterweight wheel (53) is fixedly installed on the back of the right end of the rotating frame (52). A first pressing wheel (54) is provided on the front of the left end of the rotating frame (52). An mounting plate (55) is fixedly installed on the front of the baffle plate (3). A fixed shaft (56) is fixedly installed on the front of the mounting plate (55). A fixed frame (57) is fixedly installed on the front of the fixed shaft (56). A first pressing wheel (54) is fixedly installed on the inner side of the right end of the mounting frame (4). A hinged seat (58) is provided. A hydraulic cylinder (59) is hinged to the right side of the first hinged seat (58). A pusher frame (510) is hinged to the output end of the hydraulic cylinder (59). A rotating seat (511) is fixedly installed on the inner back side of the mounting frame (4). A rotating shaft (512) is rotatably installed on the front side of the rotating seat (511). A fixing body (513) is fixedly installed on the inner top side of the mounting frame (4). A pressing frame (514) is fixedly installed at the end of the rotating shaft (512) away from the rotating seat (511). A second pressing wheel (515) is provided at the end of the pressing frame (514) away from the rotating shaft (512). The locking mechanism (7) includes a connecting rod (71), which is fixedly installed on the top right side of the baffle plate (3). A connecting block (72) is fixedly installed at the end of the connecting rod (71) away from the baffle plate (3). A sliding frame (73) is fixedly installed on the right side of the feeding bin (1). A limit rod (74) is fixedly installed on the inner side of the sliding frame (73). A sliding table (75) is slidably installed on the outer side of the limit rod (74). A rotating piece (76) is rotatably installed on the right side of the sliding table (75). A rotating connecting rod (77) is rotatably installed between the right side of the rotating piece (76) and the right side of the sliding table (75). A plug-in shaft (78) is fixedly installed on the outer side of the sliding table (75). Two sliding tables (75) are provided. A through hole is provided at the corresponding position of the sliding table (75) and the limiting rod (74). The limiting rod (74) passes through the through hole. An installation groove is provided on the inner side of the sliding table (75) near the front. A cylinder (79) is fixedly installed inside the installation groove. A pneumatic push rod (710) is fixedly installed on the back of the cylinder (79). The end of the pneumatic push rod (710) away from the cylinder (79) is fixedly installed inside the sliding frame (73). There are two rotating connecting rods (77), and the two rotating connecting rods (77) are installed in opposite directions. A connecting pin is provided on the right side of the rotating plate (76) and the sliding table (75), and the rotating connecting rod (77) is sleeved on the outside of the connecting pin. The sliding frame (73) and the connecting block (72) are provided with through holes at the corresponding positions of the plug shaft (78), and the plug shaft (78) passes through the through holes.

2. The leak-proof feeding device for plastic machinery production according to claim 1, characterized in that: The right side of the fixed frame (57) is an arc-shaped structure, and the first pressing wheel (54) is rolled on the right side of the arc-shaped structure, while the second pressing wheel (515) is rolled on the top left side of the rotating frame (52).

3. The leak-proof feeding device for plastic machinery production according to claim 1, characterized in that: The push frame (510) is fixedly installed on the outside of the rotating shaft (512). The fixing body (513) has a through hole at the corresponding position of the rotating shaft (512), and the rotating shaft (512) is rotatably installed in the through hole.

4. The leak-proof feeding device for plastic machinery production according to claim 1, characterized in that: The weighing and measuring mechanism (8) includes a mounting frame (81), which is fixedly installed at the bottom of the baffle plate (3). A cover plate (82) is fixedly installed at the bottom of the mounting frame (81). Limiting blocks (83) are fixedly installed on the front and back inner walls of the mounting frame (81). A pressing block (84) is slidably installed on the inner side of the limiting block (83). A pressing shaft (85) is fixedly installed on the top of the pressing block (84). A weighing plate (86) is fixedly installed on the top of the pressing shaft (85). There are three pressing shafts (85). Through holes are opened at the corresponding positions of the baffle plate (3) and the pressing shafts (85), and the pressing shafts (85) pass through the through holes.

5. The leak-proof feeding device for plastic machinery production according to claim 4, characterized in that: The left and right sides of the pressing block (84) are fixedly installed with third hinge seats (87). The outer side of the third hinge seat (87) is hingedly installed with a pressing push rod (88). The end of the pressing push rod (88) away from the third hinge seat (87) is hingedly installed with a fourth hinge seat (89). The left and right sides of the mounting frame (81) are provided with grooves at the corresponding positions of the fourth hinge seat (89). The fourth hinge seat (89) is inserted into the groove, and a pressure sensor (810) is fixedly installed between the inner wall of the groove and the outer end face of the fourth hinge seat (89).

6. The leak-proof feeding device for plastic machinery production according to claim 5, characterized in that: A limiting cylinder (811) is fixedly installed on the top of the cover plate (82), and a limiting shaft (812) is fixedly installed on the bottom of the pressing block (84). The end of the limiting shaft (812) away from the pressing block (84) is inserted into the inside of the limiting cylinder (811), and a fixing spring (813) is fixedly installed inside the limiting cylinder (811).

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