Plastic cover molding press

Abstract

The utility model relates to the technical field of plastic cover production, in particular to a plastic cover forming press which is characterized in that plastic particles are poured into a conveying mechanism, conveyed through the conveying mechanism, heated and melted, and then melted plastic is discharged into a forming mechanism. Molten plastic is extruded through the forming mechanism, meanwhile, the temperature of the forming mechanism is adjusted through the temperature adjusting mechanism, the molten plastic is cooled to form a plastic cover, then the plastic cover is separated from the forming mechanism through the discharging mechanism, and therefore the practicability of the equipment is improved; comprising a conveying mechanism; the device further comprises a forming mechanism, a temperature adjusting mechanism and a discharging mechanism, and the conveying mechanism, the temperature adjusting mechanism and the discharging mechanism are all installed on the forming mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic cover production, in particular to a plastic cover molding press. Background Art

[0002] The plastic cover is a cover made of plastic material. The existing production method of the plastic cover is through a high specific strength thermoplastic plastic daily necessities injection molding device disclosed in the utility model patent with application number 201920706324.5 and a clamping device for a plastic molding machine disclosed in the invention patent with application number 201310271744.2, etc., both of which can achieve the shaping of the plastic cover.

[0003] However, it is found during use that the plastic cover is easy to adhere to the mold after being formed, which is inconvenient to remove, affecting production efficiency and resulting in poor practicality. Therefore, a plastic cover molding press is urgently needed. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a plastic cover type molding press, which pours plastic particles into a conveying mechanism, conveys the plastic particles through the conveying mechanism, heats the plastic particles to melt the plastic particles, then discharges the molten plastic into a molding mechanism, extrude the molten plastic through the molding mechanism, and adjusts the temperature of the molding mechanism through a temperature regulating mechanism to cool the molten plastic to form a plastic cover, and then separates the plastic cover from the molding mechanism through a discharging mechanism, thereby improving the practicality of the equipment.

[0005] The utility model discloses a plastic cover molding press, comprising a conveying mechanism, a molding mechanism, a temperature regulating mechanism and a discharging mechanism, wherein the conveying mechanism, the temperature regulating mechanism and the discharging mechanism are all installed on the molding mechanism;

[0006] The conveying mechanism conveys and melts the raw materials, the molding mechanism shapes the plastic cover, the temperature regulating mechanism regulates the temperature of the molding mechanism, and the discharging mechanism assists the molding mechanism in discharging the materials;

[0007] The plastic particles are poured into the conveying mechanism, and the plastic particles are conveyed by the conveying mechanism. At the same time, the plastic particles are heated to melt the plastic particles. The molten plastic is then discharged into the molding mechanism. The molten plastic is extruded by the molding mechanism. At the same time, the temperature of the molding mechanism is adjusted by the temperature regulating mechanism to cool the molten plastic to form a plastic cover. The plastic cover is then separated from the molding mechanism by the discharging mechanism, thereby improving the practicability of the equipment.

[0008] Preferably, the molding mechanism includes a workbench, multiple groups of guide columns, a top plate, a lifting plate, a first hydraulic cylinder, a frame, a top mold and a bottom mold. The top plate is installed on the top of the workbench through multiple groups of guide columns, the top of the lifting plate is installed on the top plate, the first hydraulic cylinder is slidably installed on the multiple groups of guide columns, the top of the first hydraulic cylinder is connected to the bottom end of the lifting plate, the top of the frame is connected to the bottom end of the first hydraulic cylinder, the top mold is installed at the bottom end of the frame, and the top mold is provided with an exhaust hole, the bottom mold is installed on the top of the workbench, and the bottom mold is located below the top mold; the top mold is extended into the bottom mold by extending the lifting plate, and then the molten plastic is discharged into the bottom mold through the conveying mechanism, so that the molten plastic fills the space between the top mold and the bottom mold, and then the temperature of the molding mechanism is adjusted by the temperature regulating mechanism to cool the molten plastic to form a plastic cover, and then the top mold is reset by contracting the lifting plate, and the plastic cover is separated from the molding mechanism by the discharging mechanism, thereby improving the practicability of the equipment.

[0009] Preferably, the discharge mechanism includes an air bag, an annular scraper, a sealing seat, a sealing tube, a second hydraulic cylinder and an air compressor, a chamber is arranged inside the workbench, the top end of the air bag is connected to the bottom end of the frame, the annular scraper is mounted on the bottom end of the air bag, and the annular scraper is slidably mounted on the top mold, the second hydraulic cylinder is mounted inside the workbench, the bottom end of the sealing seat is connected to the top end of the second hydraulic cylinder, and the sealing seat is slidably mounted inside the bottom mold, the sealing tube is fixedly mounted on the bottom end of the bottom mold and the sealing seat, and the bottom mold seals the joint between the bottom mold and the sealing seat, the air compressor is mounted inside the workbench, and the air compressor The exhaust port is communicated with the interior of the sealing tube; the air bag is connected to an air compressor or other air compression equipment. After the plastic cover is formed, the second hydraulic cylinder is contracted to increase the gap between the sealing seat and the bottom mold. The air is then compressed by the air compressor and discharged into the sealing tube. The compressed air passes through the gap between the bottom mold and the sealing seat and enters the bottom mold. The plastic cover is separated from the bottom mold and the sealing seat by inflation of the compressed air. The compressed air is then discharged into the air bag to expand the air bag. The annular scraper is extended to scrape off the plastic cover adhered to the top mold to complete the discharge, thereby improving the practicability of the equipment.

[0010] Preferably, the temperature regulating mechanism comprises a slider, a first motor, a lead screw, a third hydraulic cylinder, a heating element, a fourth hydraulic cylinder, a temperature conducting element and a refrigerator, a cavity is arranged inside the top mold, an opening is arranged at the top end of the top mold, the slider is slidably mounted on the frame, the first motor is mounted on the frame, one end of the lead screw is rotatably connected to the side end of the frame, the other end of the lead screw passes through the slider and is connected to the output shaft of the first motor, and the surface of the lead screw is threadedly connected to the middle part of the slider, the third hydraulic cylinder, the fourth hydraulic cylinder and the refrigerator are all mounted on the slider, the heating element and the temperature conducting element are respectively mounted on the bottom ends of the third hydraulic cylinder and the fourth hydraulic cylinder, and the output end of the refrigerator is communicated with the inside of the temperature conducting element through a conveying pipe; before the molten plastic is discharged into the interior of the bottom mold, the first motor is opened , the slider is driven by the lead screw to slide horizontally, the heating element is moved to the top of the top mold, and then the third hydraulic cylinder is extended to extend the heating element into the top mold, the top mold, the bottom mold and the sealing seat are heated by the heating element, and then the molten plastic is discharged into the bottom mold. After the molten plastic fills the space between the top mold, the bottom mold and the sealing seat, the third hydraulic cylinder is contracted, and the first motor drives the slider to slide horizontally again, the temperature conducting element is moved to the top of the top mold, and then the fourth hydraulic cylinder is extended to extend the temperature conducting element into the top mold, and the temperature conducting element is cooled by the refrigerator, so that the temperature conducting element conducts the low temperature to the plastic between the top mold, the bottom mold and the sealing seat, so that the plastic is quickly cooled and solidified, thereby improving the practicality of the equipment.

[0011] Preferably, the conveying mechanism includes a heating tube, a fixing seat, a second motor, a fifth hydraulic cylinder, a rotating shaft, a spiral blade, a storage cylinder, a connecting valve and a sealing mechanism. The heating tube is installed on the workbench through the fixing seat, and one end of the heating tube is communicated with the interior of the bottom mold through an electric control valve. The second motor is installed on the heating tube through the fifth hydraulic cylinder. One end of the rotating shaft is connected to the output shaft of the second motor, and the other end of the rotating shaft extends into the interior of the heating tube. The spiral blade is installed on the rotating shaft. The sealing mechanism is installed on the other end of the rotating shaft. The storage cylinder is installed on the heating tube through the connecting valve. The particles are poured into the storage cylinder, the connecting valve is opened to discharge the plastic particles into the heating tube, the second motor is turned on, the rotating shaft drives the spiral blade to rotate, and the plastic particles are transported to the other end of the heating tube. At the same time, the plastic particles are heated by the heating tube to melt the plastic particles, and then the fifth hydraulic cylinder is extended to move the sealing mechanism toward the second motor, so that the molten plastic flows to the left side of the sealing mechanism, and then the fifth hydraulic cylinder is contracted to squeeze the molten plastic into the bottom mold, and the molten plastic is discharged into the bottom mold, thereby improving the practicability of the equipment.

[0012] Preferably, the sealing mechanism includes a piston, a support column and a sealing plate, the piston is installed on the other end of the rotating shaft, and a plurality of through holes are provided on the piston, one end of the support column is connected to the side end of the piston, and the sealing plate is slidably installed on the support column; when the fifth hydraulic cylinder is extended, the piston moves toward the direction of the second motor, and the molten plastic in the heating tube flows through the through hole on the piston to the left side of the sealing plate, and then contracts through the fifth hydraulic cylinder to make the sealing plate stick to the piston and seal the through hole on the piston, so that the sealing plate cooperates with the piston to push the molten plastic into the bottom mold, thereby improving the practicability of the equipment.

[0013] Compared with the prior art, the utility model has the following beneficial effects: plastic particles are poured into a conveying mechanism, the plastic particles are conveyed by the conveying mechanism, and the plastic particles are heated to melt the plastic particles, and then the molten plastic is discharged into a molding mechanism, the molten plastic is extruded by the molding mechanism, and the temperature of the molding mechanism is adjusted by a temperature regulating mechanism to cool the molten plastic to form a plastic cover, and then the plastic cover is separated from the molding mechanism by the discharging mechanism, thereby improving the practicability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a first axonometric structural schematic diagram of the utility model;

[0015] Figure 2 It is a second axonometric structural schematic diagram of the utility model;

[0016] Figure 3 It is a front view structural schematic diagram of the utility model;

[0017] Figure 4 It is a front view cross-sectional structural schematic diagram of the utility model;

[0018] Figure 5 It is a front view cross-sectional enlarged structural schematic diagram of the conveying mechanism of the utility model.

[0019] Markings in the attached drawings: 1. workbench; 2. guide column; 3. top plate; 4. lifting plate; 5. first hydraulic cylinder; 6. frame; 7. top mold; 8. bottom mold; 9. airbag; 10. annular scraper; 11. sealing seat; 12. sealing tube; 13. second hydraulic cylinder; 14. air compressor; 15. slider; 16. first motor; 17. screw; 18. third hydraulic cylinder; 19. heating element; 20. fourth hydraulic cylinder; 21. temperature conducting element; 22. refrigerator; 23. heating tube; 24. fixed seat; 25. second motor; 26. fifth hydraulic cylinder; 27. rotating shaft; 28. spiral blade; 29. ​​storage cylinder; 30. connecting valve; 31. piston; 32. support column; 33. sealing plate. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive. Example 1

[0021] It includes a conveying mechanism; it also includes a molding mechanism, a temperature regulating mechanism and a discharging mechanism, and the conveying mechanism, the temperature regulating mechanism and the discharging mechanism are all installed on the molding mechanism;

[0022] The conveying mechanism conveys and melts the raw materials, the molding mechanism shapes the plastic cover, the temperature regulating mechanism regulates the temperature of the molding mechanism, and the discharging mechanism assists the molding mechanism in discharging the materials;

[0023] The top mold 7 is extended into the bottom mold 8 by extending the lifting plate 4, and then the molten plastic is discharged into the bottom mold 8 by the conveying mechanism, so that the molten plastic fills the space between the top mold 7 and the bottom mold 8, and then the temperature of the molding mechanism is adjusted by the temperature regulating mechanism to cool the molten plastic to form a plastic cover, and then the top mold 7 is reset by contracting the lifting plate 4, and the plastic cover is separated from the molding mechanism by the discharging mechanism, thereby improving the practicality of the equipment;

[0024] The discharging mechanism includes an airbag 9, an annular scraper 10, a sealing seat 11, a sealing tube 12, a second hydraulic cylinder 13 and an air compressor 14. A chamber is arranged inside the workbench 1. The top of the airbag 9 is connected to the bottom of the frame 6. The annular scraper 10 is mounted on the bottom of the airbag 9, and the annular scraper 10 is slidably mounted on the top mold 7. The second hydraulic cylinder 13 is mounted inside the workbench 1. The bottom end of the sealing seat 11 is connected to the top of the second hydraulic cylinder 13, and the sealing seat 11 is slidably mounted inside the bottom mold 8. The sealing tube 12 is fixedly mounted on the bottom end of the bottom mold 8 and the sealing seat 11, and the bottom mold 8 seals the joint between the bottom mold 8 and the sealing seat 11. The air compressor 14 is mounted inside the workbench 1, and the exhaust port of the air compressor 14 is communicated with the inside of the sealing tube 12.

[0025] The top mold 7 is extended into the bottom mold 8 by extending the lifting plate 4, and then the molten plastic is discharged into the bottom mold 8 by the conveying mechanism, and the plastic particles are poured into the conveying mechanism, and the plastic particles are conveyed by the conveying mechanism, and the plastic particles are heated to melt the plastic particles, and then the molten plastic is discharged into the molding mechanism, and the molten plastic is extruded by the molding mechanism, and the temperature of the molding mechanism is adjusted by the temperature regulating mechanism to cool the molten plastic to form a plastic cover, and then the top mold 7 is reset by contracting the lifting plate 4, and the plastic cover and the plastic cover are separated by the discharge mechanism. The molding mechanism is separated, and at the same time, the second hydraulic cylinder 13 is contracted to increase the gap between the sealing seat 11 and the bottom mold 8. Then, the air is compressed by the air compressor 14 and discharged into the sealing tube 12, so that the compressed air enters the bottom mold 8 through the gap between the bottom mold 8 and the sealing seat 11. The plastic cover is separated from the bottom mold 8 and the sealing seat 11 by the inflation of the compressed air. Then, the compressed air is discharged into the airbag 9 to expand the airbag 9, and the annular scraper 10 is stretched to scrape off the plastic cover adhering to the top mold 7, thereby completing the discharge and improving the practicability of the equipment. Example 2

[0026] It includes a conveying mechanism; it also includes a molding mechanism, a temperature regulating mechanism and a discharging mechanism, and the conveying mechanism, the temperature regulating mechanism and the discharging mechanism are all installed on the molding mechanism;

[0027] The conveying mechanism conveys and melts the raw materials, the molding mechanism shapes the plastic cover, the temperature regulating mechanism regulates the temperature of the molding mechanism, and the discharging mechanism assists the molding mechanism in discharging the materials;

[0028] The top mold 7 is extended into the bottom mold 8 by extending the lifting plate 4, and then the molten plastic is discharged into the bottom mold 8 by the conveying mechanism, so that the molten plastic fills the space between the top mold 7 and the bottom mold 8, and then the temperature of the molding mechanism is adjusted by the temperature regulating mechanism to cool the molten plastic to form a plastic cover, and then the top mold 7 is reset by contracting the lifting plate 4, and the plastic cover is separated from the molding mechanism by the discharging mechanism, thereby improving the practicality of the equipment;

[0029] The discharging mechanism includes an airbag 9, an annular scraper 10, a sealing seat 11, a sealing tube 12, a second hydraulic cylinder 13 and an air compressor 14. A chamber is arranged inside the workbench 1. The top of the airbag 9 is connected to the bottom of the frame 6. The annular scraper 10 is mounted on the bottom of the airbag 9, and the annular scraper 10 is slidably mounted on the top mold 7. The second hydraulic cylinder 13 is mounted inside the workbench 1. The bottom end of the sealing seat 11 is connected to the top of the second hydraulic cylinder 13, and the sealing seat 11 is slidably mounted inside the bottom mold 8. The sealing tube 12 is fixedly mounted on the bottom end of the bottom mold 8 and the sealing seat 11, and the bottom mold 8 seals the joint between the bottom mold 8 and the sealing seat 11. The air compressor 14 is mounted inside the workbench 1, and the exhaust port of the air compressor 14 is communicated with the inside of the sealing tube 12.

[0030] The temperature regulating mechanism includes a slider 15, a first motor 16, a lead screw 17, a third hydraulic cylinder 18, a heating element 19, a fourth hydraulic cylinder 20, a temperature conducting element 21 and a refrigerator 22. A cavity is provided inside the top mold 7, and an opening is provided at the top of the top mold 7. The slider 15 is slidably mounted on the frame 6, the first motor 16 is mounted on the frame 6, one end of the lead screw 17 is rotatably connected to the side end of the frame 6, the other end of the lead screw 17 passes through the slider 15 and is connected to the output shaft of the first motor 16, and the surface of the lead screw 17 is threadedly connected to the middle of the slider 15, the third hydraulic cylinder 18, the fourth hydraulic cylinder 20 and the refrigerator 22 are all mounted on the slider 15, the heating element 19 and the temperature conducting element 21 are respectively mounted at the bottom ends of the third hydraulic cylinder 18 and the fourth hydraulic cylinder 20, and the output end of the refrigerator 22 is communicated with the inside of the temperature conducting element 21 through a conveying pipe;

[0031] The top mold 7 is extended into the bottom mold 8 by extending the lifting plate 4, and the first motor 16 is turned on and the slider 15 is driven by the lead screw 17 to slide horizontally, and the heating element 19 is moved to the top of the top mold 7. Then, the third hydraulic cylinder 18 is extended to extend the heating element 19 into the top mold 7, and the top mold 7, the bottom mold 8 and the sealing seat 11 are heated by the heating element 19. Then, the molten plastic is discharged into the bottom mold 8 by the conveying mechanism, and the plastic particles are poured into the conveying mechanism. The plastic particles are conveyed by the conveying mechanism and heated at the same time to melt the plastic particles. Then, the molten plastic is discharged into the molding mechanism, and the molten plastic is squeezed by the molding mechanism. At the same time, the third hydraulic cylinder 18 is contracted, and the slider 15 is driven to slide horizontally by the first motor 16 again to move the temperature conducting element 21 to the top of the top mold 7. Then, the fourth hydraulic cylinder 20 is extended to extend the temperature conducting element 21. The top mold 7 is entered into the top mold 7, and the temperature conducting element 21 is cooled by the refrigerator 22, so that the temperature conducting element 21 conducts the low temperature to the plastic between the top mold 7, the bottom mold 8 and the sealing seat 11, so that the plastic is quickly cooled and solidified to form a plastic cover, and then the top mold 7 is reset by contracting the lifting plate 4, and the plastic cover is separated from the molding mechanism by the discharge mechanism, and the gap between the sealing seat 11 and the bottom mold 8 is increased by contracting the second hydraulic cylinder 13, and then the air is compressed by the air compressor 14, and the compressed air is discharged into the sealing tube 12, so that the compressed air passes through the gap between the bottom mold 8 and the sealing seat 11 and enters the bottom mold 8, and the plastic cover is separated from the bottom mold 8 and the sealing seat 11 by the inflation of the compressed air, and then the compressed air is discharged into the airbag 9 to expand the airbag 9, and the plastic cover adhering to the top mold 7 is scraped off by the extension of the annular scraper 10, and the discharge is completed, thereby improving the practicality of the equipment.

[0032] like Figures 1 to 5As shown, a plastic cover molding press of the utility model, when working, firstly extends the lifting plate 4 to extend the top mold 7 into the bottom mold 8, and then turns on the first motor 16, through the screw 17 transmission, the slider 15 slides horizontally, and the heating element 19 is moved to the top of the top mold 7, and then the third hydraulic cylinder 18 is extended to extend the heating element 19 into the top mold 7, and the top mold 7, the bottom mold 8 and the sealing seat 11 are heated by the heating element 19, and then the molten plastic is discharged into the bottom mold 8 through the conveying mechanism, and the plastic particles are poured into In the storage cylinder 29, the connecting valve 30 is opened to discharge the plastic particles into the heating pipe 23, and the second motor 25 is turned on to make the rotating shaft 27 drive the spiral blade 28 to rotate, so as to transport the plastic particles to the other end of the heating pipe 23. At the same time, the plastic particles are heated by the heating pipe 23 to melt the plastic particles, and then the fifth hydraulic cylinder 26 is extended to move the sealing mechanism toward the second motor 25, so that the molten plastic flows to the left side of the sealing mechanism, and then the fifth hydraulic cylinder 26 is contracted to squeeze the molten plastic into the bottom mold 8, so that the molten plastic is discharged into the bottom mold 8, and then the sealing mechanism is pressed into the bottom mold 8. The overmolding mechanism squeezes the molten plastic and contracts through the third hydraulic cylinder 18. The first motor 16 drives the slider 15 to slide horizontally again, and the temperature conducting element 21 is moved to the top of the top mold 7. Then, the fourth hydraulic cylinder 20 extends the temperature conducting element 21 into the top mold 7. The temperature conducting element 21 is cooled by the refrigerator 22, so that the temperature conducting element 21 conducts the low temperature to the plastic between the top mold 7, the bottom mold 8 and the sealing seat 11, so that the plastic is quickly cooled and solidified to form a plastic cover. Then, the top mold 7 is reset by contracting the lifting plate 4, and the material discharge mechanism is used. The plastic cover is separated from the molding mechanism, and the second hydraulic cylinder 13 is contracted to increase the gap between the sealing seat 11 and the bottom mold 8. The air is then compressed by the air compressor 14 and discharged into the sealing tube 12, so that the compressed air passes through the gap between the bottom mold 8 and the sealing seat 11 and enters the bottom mold 8. The plastic cover is separated from the bottom mold 8 and the sealing seat 11 by the inflation of the compressed air. The compressed air is then discharged into the airbag 9 to expand the airbag 9, and the annular scraper 10 is stretched to scrape off the plastic cover adhering to the top mold 7, thereby completing the discharge.

[0033] The first hydraulic cylinder 5, the second hydraulic cylinder 13, the air compressor 14, the first motor 16, the third hydraulic cylinder 18, the heating element 19, the fourth hydraulic cylinder 20, the temperature conducting element 21, the refrigerator 22, the second motor 25 and the fifth hydraulic cylinder 26 of the plastic cover forming press of the utility model are purchased on the market, and the technicians in the industry only need to install and operate them according to the accompanying instruction manual, without the need for the technicians in this field to make creative labor.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A plastic cover forming press, comprising a conveying mechanism; characterized in that: It also includes a molding mechanism, a temperature regulating mechanism and a discharging mechanism, wherein the conveying mechanism, the temperature regulating mechanism and the discharging mechanism are all installed on the molding mechanism; The conveying mechanism conveys and melts the raw materials, the molding mechanism shapes the plastic cover, the temperature regulating mechanism regulates the temperature of the molding mechanism, and the discharging mechanism assists the molding mechanism in discharging the materials; The molding mechanism comprises a workbench (1), a plurality of guide columns (2), a top plate (3), a lifting plate (4), a first hydraulic cylinder (5), a frame (6), a top mold (7) and a bottom mold (8); the top plate (3) is mounted on the top of the workbench (1) through the plurality of guide columns (2); the top of the lifting plate (4) is mounted on the top plate (3); the first hydraulic cylinder (5) is slidably mounted on the plurality of guide columns (2); the top of the first hydraulic cylinder (5) is connected to the bottom of the lifting plate (4); the top of the frame (6) is connected to the bottom of the first hydraulic cylinder (5); the top mold (7) is mounted on the bottom of the frame (6); and an exhaust hole is provided on the top mold (7); the bottom mold (8) is mounted on the top of the workbench (1); and the bottom mold (8) is located below the top mold (7); The discharge mechanism comprises an air bag (9), an annular scraper (10), a sealing seat (11), a sealing pipe (12), a second hydraulic cylinder (13) and an air compressor (14); a chamber is arranged inside the workbench (1); the top end of the air bag (9) is connected to the bottom end of the frame (6); the annular scraper (10) is mounted on the bottom end of the air bag (9); the annular scraper (10) is slidably mounted on the top mold (7); the second hydraulic cylinder (13) is mounted inside the workbench (1); the sealing The bottom end of the seat (11) is connected to the top end of the second hydraulic cylinder (13), and the sealing seat (11) is slidably mounted inside the bottom mold (8), the sealing tube (12) is fixedly mounted on the bottom ends of the bottom mold (8) and the sealing seat (11), and the bottom mold (8) seals the joint between the bottom mold (8) and the sealing seat (11), the air compressor (14) is mounted inside the workbench (1), and the exhaust port of the air compressor (14) is communicated with the inside of the sealing tube (12).

2. A plastic cover forming press as claimed in claim 1, characterized in that: The temperature regulating mechanism comprises a slider (15), a first motor (16), a lead screw (17), a third hydraulic cylinder (18), a heating element (19), a fourth hydraulic cylinder (20), a temperature conducting element (21) and a refrigerator (22); a cavity is arranged inside the top mold (7); an opening is arranged at the top end of the top mold (7); the slider (15) is slidably mounted on the frame (6); the first motor (16) is mounted on the frame (6); one end of the lead screw (17) is rotatably connected to the side end of the frame (6); and the lead screw ( The other end of the lead screw (17) passes through the slider (15) and is connected to the output shaft of the first motor (16), and the surface of the lead screw (17) is threadedly connected to the middle of the slider (15). The third hydraulic cylinder (18), the fourth hydraulic cylinder (20) and the refrigerator (22) are all installed on the slider (15). The heating element (19) and the thermal conductive element (21) are respectively installed at the bottom ends of the third hydraulic cylinder (18) and the fourth hydraulic cylinder (20), and the output end of the refrigerator (22) is communicated with the interior of the thermal conductive element (21) through a delivery pipe.

3. A plastic cover forming press as claimed in claim 1, characterized in that: The conveying mechanism comprises a heating tube (23), a fixing seat (24), a second motor (25), a fifth hydraulic cylinder (26), a rotating shaft (27), a spiral blade (28), a storage cylinder (29), a connecting valve (30) and a sealing mechanism. The heating tube (23) is mounted on the workbench (1) through the fixing seat (24), and one end of the heating tube (23) is communicated with the interior of the bottom mold (8) through an electric control valve. The second motor (25) is mounted on the heating tube (23) through the fifth hydraulic cylinder (26). One end of the rotating shaft (27) is connected to the output shaft of the second motor (25), and the other end of the rotating shaft (27) extends into the interior of the heating tube (23). The spiral blade (28) is mounted on the rotating shaft (27). The sealing mechanism is mounted on the other end of the rotating shaft (27). The storage cylinder (29) is mounted on the heating tube (23) through the connecting valve (30).

4. A plastic cover forming press as claimed in claim 3, characterized in that: The sealing mechanism comprises a piston (31), a support column (32) and a sealing plate (33); the piston (31) is mounted on the other end of the rotating shaft (27), and a plurality of through holes are provided on the piston (31); one end of the support column (32) is connected to the side end of the piston (31), and the sealing plate (33) is slidably mounted on the support column (32).

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