Anti-deformation composite fiber molded pulp drying and heating device and method

Abstract

The invention discloses an anti-deformation composite fiber molded pulp drying and heating device and method, and relates to the technical field of paper plastic drying. A dynamic heating assembly comprises an annular plate and a plurality of embedded vertical boxes embedded in the annular plate, and each embedded vertical box is provided with a vertical heater and a photoelectric distance probe. The supporting assembly comprises a base plate and an inner plate, the base plate is rotationally installed below the annular plate, the inner plate is fixed above the base plate, and four pairs of positioning heat storage square rods are fixedly installed on the top face of the inner plate. The sealing cover limiting assembly comprises a top cover, an inner inflator located on the bottom face of the top cover and a plurality of air cylinders distributed on the annular side of the inner inflator, and the air cylinders communicate with the inner inflator. A gap is reserved between the inner folded plate and the outer folded plate, and a pressure sensing module is embedded in the side face, facing the outer folded plate, of the inner folded plate. The driving assembly comprises a servo motor used for driving the annular plate to rotate. The synchronous coordination of the drying degree of the edges of the formed plastic part and the drying degree of other positions is guaranteed, and the quality problem caused by insufficient local drying or excessive drying is effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of paper-plastic drying, and particularly to an anti-deformation composite fiber pulp molding drying and heating device and method. Background Art

[0002] When drying paper-plastic products, the edge position of the composite fiber pulp molding product has a relatively larger thickness than other positions. During the drying process, if a conventional unified heating method is adopted, it is difficult for the edge position to obtain sufficient heat for complete drying, while other thinner parts may have quality problems such as deformation and embrittlement due to overheating, affecting the overall quality of the product.

[0003] For example, when the existing drying kiln heats and dries paper-plastic products, the temperature at each position in the drying kiln is the same. However, due to the same temperature, when the edge position of the paper-plastic has not been completely dried, other positions of the paper-plastic have already reached the drying standard. If we want to completely dry the edge of the paper-plastic, it will cause over-drying of other positions of the paper-plastic.

[0004] In summary, when drying paper-plastic products, ensuring the synchronous coordination of the drying degree between the edge position and other positions of the paper-plastic, and avoiding the occurrence of local under-drying or over-drying phenomena, has become a problem to be solved. Summary of the Invention

[0005] To solve the above technical problems, the present invention is realized through the following technical solutions: The present invention provides an anti-deformation composite fiber pulp molding drying and heating device, including: A dynamic heating component, including an annular plate, a plurality of embedded vertical boxes embedded in the annular plate. The embedded vertical boxes are configured with vertical heaters and photoelectric distance probes. An inner periphery of the annular plate is provided with a formed plastic part, and a plurality of drying convection spaces are formed between an outer ring surface of the formed plastic part and an inner ring surface of the annular plate.

[0006] A support component, including a chassis and an inner disk. The chassis is rotatably installed below the annular plate, and the inner disk is fixed above the chassis. Four pairs of positioning heat storage square rods are fixedly installed on the top surface of the inner disk. A heat radiation gap facing the vertical edge of the formed plastic part is left between each pair of positioning heat storage square rods. The inner disk is also provided with a plurality of exhaust holes communicating with the drying convection spaces.

[0007] A cover limiting component, including a top cover, an inner air cylinder located at the bottom surface of the top cover, and a plurality of air cylinders distributed on the circumferential side of the inner air cylinder. The air cylinders communicate with the inner air cylinder. Each air cylinder is drivingly connected to a shaft rod, and the end of the shaft rod is fixedly connected to an inner folding plate. The inner folding plate is movably connected to an outer folding plate that cooperates with the inner corner position of the formed plastic part. A gap is left between the inner folding plate and the outer folding plate. A pressure sensing module is embedded on the side surface of the inner folding plate facing the outer folding plate.

[0008] The driving component includes a servo motor for driving the ring plate to rotate back and forth within a central angle range of 90°.

[0009] As a preferred technical solution of the drying and heating device of the present invention: the radius of the chassis is greater than the radius of the inner disk, and a lower bearing ring is arranged on the periphery of the inner disk, and the lower bearing ring is located between the top surface of the chassis and the bottom surface of the ring plate.

[0010] As a preferred technical solution of the drying and heating device of the present invention: a plurality of exhaust holes are distributed in the peripheral area of the molded plastic part, and a plurality of exhaust pipes are installed on the chassis, and each exhaust pipe is independently communicated with an exhaust hole.

[0011] As a preferred technical solution of the drying and heating device of the present invention: the main air pressure pipe is fixedly connected to the center of the top surface of the top cover, the main air pressure pipe is communicated with the inner air cylinder, and a lifting connecting rod for driving the top cover to lift is fixedly installed on the top surface of the top cover. A plurality of air inlet pipes are arranged on the top surface of the top cover, and one air inlet pipe is independently arranged directly above each drying convection space.

[0012] As a preferred technical solution of the drying and heating device of the present invention: an upper bearing ring that cooperates with and contacts the top surface of the ring plate is arranged on the bottom surface of the top cover.

[0013] As a preferred technical solution of the drying and heating device of the present invention: an electromagnetic air valve is built in the air cylinder, and a piston structure that is in sliding contact with the inner wall of the air cylinder is arranged on the side end where the shaft rod is inserted into the air cylinder.

[0014] As a preferred technical solution of the drying and heating device of the present invention: the distances between the exhaust holes within the range of the same drying convection space and the side plates of the molded plastic part are the same.

[0015] As a preferred technical solution of the drying and heating device of the present invention: a toothed ring is arranged at the bottom of the outer ring surface of the ring plate, and the driving component includes a driving gear connected to the output shaft of the servo motor, and the driving gear is meshed and connected with the toothed ring.

[0016] The present invention provides a method for drying and heating an anti-deformation composite fiber pulp molding, including the following steps: Step 1, load the molded plastic part into the inner periphery of the ring plate through an automated device. When loading, align the vertical edges of the molded plastic part with the heat radiation gaps between the paired positioning heat storage square rods.

[0017] Step 2, drive the cover limiting component to descend through a lifting device. After the cover limiting component descends in place, the air pressure device acts on each air cylinder through the inner air cylinder, and each air cylinder pushes its respective shaft rod to move outwards, and the shaft rod drives the inner folding plate and the outer folding plate to move towards the inner corner position of the molded plastic part.

[0018] When the pressure sensing module of the inner folding plate at any position detects an increase in pressure, the air cylinder at the current position stops pushing the shaft rod and locks the air pressure inside the air cylinder. The current pressure parameter is denoted as Wa.

[0019] In step three, all vertical heaters are started to heat and dry the formed plastic part. At the same time, the photoelectric distance probe detects the distance between the vertical heater and the formed plastic part.

[0020] Among them, let the heating power of the vertical heater be Px, and the distance detected by the photoelectric distance probe from the formed plastic part be Lx. Then the heating power Px is proportional to the distance Lx.

[0021] In step four, when the vertical heater rotates to near the vertical edge of the formed plastic part, the photoelectric distance probe detects a sudden change signal in the distance occlusion state of the positioning heat storage square rod, and the heating power of the vertical heater rises to Pn, where Pn = Px + ΔP, and ΔP is the preset heating power increment.

[0022] In step five, preset condition one: when the photoelectric distance probe detects the thermal radiation gap between two positioning heat storage square rods. When condition one exists, the servo motor stops and starts to drive the ring plate to rotate in the reverse direction.

[0023] In step six, when the vertical heater is started, the air inlet pipe and the exhaust pipe perform air flow input and output operations synchronously.

[0024] In step seven, when the pressure sensing module detects that the pressure is not lower than the preset reference pressure Ws, the dynamic drying of the formed plastic part is stopped. After a delay of t seconds, the air flow in the air inlet pipe and the exhaust pipe stops, where Ws > Wa.

[0025] In step eight, the servo motor drives the vertical heater to reset. The pneumatic device acts on each air cylinder through the inner air cylinder. Each air cylinder pushes its own shaft rod to retract. The inner folding plate and the outer folding plate are separated from the inner corner position of the formed plastic part. The lifting device drives the cover limiting component to rise, and the formed plastic part is taken out from the inner ring plate through the automation device.

[0026] Compared with the existing technology, the beneficial effects of the present invention are: 1. In the present invention, the vertical heater of the dynamic heating component can adjust the heating power according to the feedback of the photoelectric distance probe. During conventional heating, according to the heating distance, the output heating intensity of the heater is controlled in a positive correlation manner. When approaching the edge of the formed plastic part, the power is increased to meet the need for more heat due to the large thickness of the edge, and the positioning heat storage square rod is used to avoid thermal damage to the edge of the formed plastic part when the heater is too close. At the same time, the heat absorber heater absorbs the heat output and continuously and stably provides drying heat to the edge of the formed plastic part, ensuring the synchronous coordination of the drying degree of the edge of the formed plastic part and the drying degree of other positions, and effectively avoiding quality problems caused by local insufficient drying or over-drying.

[0027] 2. In the present invention, the servo motor of the designed drive component drives the ring plate to rotate back and forth by 90°, which can be powered with a conventional cable arrangement, avoiding a complex brush structure and reducing the risk of failure.

[0028] 3. The heating method designed in the present invention controls the heating power, the rotation of the ring plate, and the drying process according to the sensor signals. When a thermal radiation gap is detected, the ring plate rotates in the reverse direction; when the pressure sensing module monitors that the pressure reaches the standard, the drying stops, realizing automated and intelligent operation, reducing manual intervention, and improving the accuracy and stability of paper-plastic products. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of the overall structure of the drying and heating device of the present invention;

[0030] Figure 2 is a schematic diagram of the disassembled structure of the components of the drying and heating device of the present invention;

[0031] Figure 3 is a bottom-up view of the dynamic heating component in the present invention;

[0032] Figure 4 is a bottom-up view of the dynamic heating component in the present invention;

[0033] Figure 5 is a schematic diagram of the upper structure of the support component in the present invention;

[0034] Figure 6 is a top view of the formed plastic part when it is inside the drying and heating device of the present invention;

[0035] Figure 7 is Figure 6 a schematic diagram of the partial enlarged structure at A in

[0036] Among them: 1 - dynamic heating component, 101 - ring plate, 102 - upper bearing ring, 103 - toothed ring, 104 - lower bearing ring, 105 - embedded vertical box, 1051 - vertical heater, 1052 - photoelectric distance probe; 2 - support component, 201 - chassis, 202 - inner disk, 203 - positioning heat storage square rod, 204 - exhaust hole, 205 - exhaust pipe, 206 - thermal radiation gap; 3 - cover limiting component, 301 - top cover, 302 - main air pressure pipe, 303 - intake pipe, 304 - lifting connecting rod, 305 - inner air cylinder, 306 - air cylinder, 3061 - electromagnetic air valve, 307 - shaft rod, 308 - inner folding plate, 309 - outer folding plate, 310 - pressure sensing module; 4 - drive component, 401 - servo motor, 402 - drive gear; 5 - formed plastic part; 6 - drying convection space. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] Embodiment 1. The present invention designs an anti-deformation composite fiber pulp molding drying and heating device, combined with Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , mainly configured with a dynamic heating component 1, a support component 2, a cover limiting component 3, and a driving component 4. The specific structural configuration is as follows: (1) Dynamic heating component 1: Combined with Figure 3 , Figure 6 , it is composed of an annular plate 101 and a plurality of embedded vertical boxes 105 embedded in the annular plate 101. A vertical heater 1051 is configured in the embedded vertical box 105 for heating, and an optoelectronic distance probe 1052 is used to detect the distance from the molded plastic part 5. The molded plastic part 5 is placed inside the inner circumference of the annular plate 101, and a plurality of drying convection spaces 6 are formed therebetween, providing space for the air flow circulation during the drying process.

[0039] (2) Support component 2: Combined with Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7 , it includes a chassis 201 and an inner plate 202. The chassis 201 is rotatably installed below the annular plate 101 to provide support for the rotation of the annular plate 101. The inner plate 202 is fixed above the chassis 201, and there are four pairs of positioning heat storage square rods 203 on its top surface. The square rods are made of metal, which can store heat and radiate heat to the edges of the molded plastic part 5. The heat radiation gap 206 between each pair of positioning heat storage square rods 203 is directly opposite to the vertical edge of the molded plastic part 5, facilitating the direct heat transfer of the vertical heater 1051 and also facilitating the optoelectronic distance probe 1052 to detect the gap signal so that the servo motor 401 can reverse. The inner plate 202 is also provided with a plurality of exhaust holes 204 communicating with the drying convection space 6 for discharging the moisture generated during the drying process. The plurality of exhaust holes 204 are distributed in the peripheral area of the molded plastic part 5. The chassis 201 is installed with a plurality of exhaust pipes 205, and each exhaust pipe 205 is independently connected to an exhaust hole 204 to ensure that the moisture can be discharged smoothly.

[0040] (3) Cover limiting component 3: Combined with Figure 1 , Figure 4 , Figure 5 , Figure 6 , Figure 7, including a top cover 301, an inner air cylinder 305 on the bottom surface of the top cover 301, and a plurality of air cylinders 306 distributed on the circumferential side of the inner air cylinder 305. The air cylinders 306 are communicated with the inner air cylinder 305 and are driven by air pressure. Each air cylinder 306 drives a connecting shaft rod 307, the end of the shaft rod 307 is fixedly connected to an inner folding plate 308, the inner folding plate 308 is movably connected to an outer folding plate 309, and the outer folding plate 309 is matched with the inner corner position of the molded plastic part 5 for fixing the molded plastic part 5. A gap is reserved between the inner folding plate 308 and the outer folding plate 309, and a pressure sensing module 310 is embedded on the side surface of the inner folding plate 308 facing the outer folding plate 309 for detecting the pressure between the outer folding plate 309 and the molded plastic part 5.

[0041] Combined with Figure 1 , Figure 4 , Figure 6 , a main air pressure pipe 302 is fixedly connected to the center of the top surface of the top cover 301 and is communicated with the inner air cylinder 305 to provide air pressure power for the air cylinders. An air pressure device is also connected upstream of the main air pressure pipe 302. A lifting connecting rod 304 is fixedly installed on the top surface of the top cover 301, and a lifting device is connected above the lifting connecting rod 304 for driving the top cover 301 to lift. A plurality of air inlet pipes 303 are provided on the top surface of the top cover 301, and each air inlet pipe 303 is independently arranged directly above each drying convection space 6 for inputting drying gas.

[0042] Combined with Figure 1 , Figure 3 , Figure 4 , Figure 6 , an upper bearing ring 102 that is in contact and cooperation with the top surface of the ring plate 101 is arranged on the bottom surface of the top cover 301 to reduce the friction between the top cover 301 and the ring plate 101 and ensure the smooth operation of the device. An electromagnetic air valve 3061 is built in the air cylinder 306 and is matched with the air pressure device to control the air intake and exhaust of the air cylinder. A piston structure that is in sliding contact with the inner wall of the air cylinder 306 is arranged at the side end where the shaft rod 307 is inserted into the air cylinder 306 to ensure the stability and sealing performance of the air cylinder drive.

[0043] (IV) Driving assembly 4: Combined with Figure 1 , Figure 3 , mainly composed of a servo motor 401 and a driving gear 402. The servo motor 401 is used to drive the ring plate 101 to rotate back and forth within a central angle range of 90°. A toothed ring 103 is arranged at the bottom of the outer ring surface of the ring plate 101. The driving gear 402 is connected to the output shaft of the servo motor 401 and is meshed with the toothed ring 103 to realize the rotational drive of the ring plate 101. In this way, the conventional wire arrangement structure can meet the normal power supply operation of the vertical heater 1051 and the photoelectric distance probe 1052, without the need to design a complex brush structure, reducing the risk of failure.

[0044] Embodiment 2. The present invention designs an anti-deformation composite fiber pulp molding drying and heating method, and the specific content is as follows: Step 1. Loading the molded plastic part: The molded plastic part 5 is loaded into the inner circumference of the ring plate 101 through an automated device. During loading, the vertical edge of the molded plastic part 5 is aligned with the heat radiation gap 206 between the paired positioning heat storage square rods 203 to ensure that the edge can better receive heat.

[0045] Step 2. Fixing the molded plastic part: The cover limiting component 3 is driven to descend by a lifting device. After the cover limiting component 3 descends in place, the pneumatic device acts on each cylinder 306 through the inner air cylinder 305, and each cylinder 306 pushes its respective shaft rod 307 to move outward. The shaft rod 307 drives the inner folding plate 308 and the outer folding plate 309 to move towards the inner corner position of the molded plastic part 5. When the pressure sensing module 310 of the inner folding plate 308 at any position detects an increase in pressure, it indicates that the outer folding plate 309 has touched the molded plastic part 5. The cylinder 306 at the current position stops pushing the shaft rod 307 and locks the air pressure inside the cylinder 306. The current pressure parameter is denoted as Wa, and the fixing of the molded plastic part 5 is completed.

[0046] Step 3. Heating, drying, and detecting the distance: All vertical heaters 1051 are started to heat and dry the molded plastic part 5. At the same time, the photoelectric distance probe 1052 detects the distance between the vertical heater 1051 and the molded plastic part 5. The heating power Px of the vertical heater 1051 is positively correlated with the distance Lx detected by the photoelectric distance probe 1052, that is, the heating power Px ∝ distance Lx, realizing the dynamic adjustment of the heating power according to the distance.

[0047] Step 4. Increasing the heating power of the edge: When the vertical heater 1051 rotates to near the vertical edge of the molded plastic part 5, the photoelectric distance probe 1052 detects a sudden change signal in the distance occlusion state of the positioning heat storage square rod 203, and the heating power of the vertical heater 1051 rises to Pn, where Pn = Px + ΔP, and ΔP is a preset heating power increment to meet the need for more heat at the edge.

[0048] Step 5. Reverse rotation of the ring plate: The preset condition is that the photoelectric distance probe 1052 detects the heat radiation gap 206 between the two positioning heat storage square rods 203. When this condition is met, the servo motor 401 stops and starts to drive the ring plate 101 to rotate in the reverse direction, so that the vertical heater 1051 moves back and forth within a 90° angle range to uniformly heat the molded plastic part 5.

[0049] Step 6. Airflow circulation operation: When the vertical heater 1051 is started, the air inlet pipe 303 and the exhaust pipe 205 simultaneously perform air input and output operations to ensure the air circulation in the drying convection space 6 and improve the drying efficiency.

[0050] Step Seven, Stop Drying: When the pressure sensing module 310 detects that the pressure is not lower than the preset reference pressure Ws (Ws > Wa), it indicates that the molded plastic part 5 has shrunk and tightened to a certain extent during drying. Then, the dynamic drying of the molded plastic part 5 is stopped. After a delay of t seconds, the air flow in the intake pipe 303 and the exhaust pipe 205 stops.

[0051] During the heating and drying process of the molded plastic part 5, there is a certain degree of shrinkage. The molded plastic part 5 shrinks inward and tightens, and the pressure on the outer folding plate 309 will gradually increase. Naturally, the pressure sensing module 310 can also detect the degree of shrinkage and tightening of the molded plastic part 5 during drying. This forms a corresponding relationship with the initial extrusion signal detected by the pressure sensing module 310 when the outer folding plate 309 and the molded plastic part 5 were initially in contact before heating, which is the starting point of the heating and drying process.

[0052] Step Eight, Remove the Molded Plastic Part: The servo motor 401 drives the vertical heater 1051 to reset. The pneumatic device acts on each cylinder 306 through the inner air cylinder 305. Each cylinder 306 pushes its respective shaft rod 307 to retract. The inner folding plate 308 and the outer folding plate 309 are disengaged from the inner corner position of the molded plastic part 5. The lifting device drives the cover limiting component 3 to rise. Finally, the molded plastic part 5 is removed from the inner ring plate 101 by an automated device.

[0053] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. Anti-deformation composite fiber pulp molding drying and heating device, characterized in that: include: A dynamic heating assembly (1) comprises a ring plate (101), a plurality of embedded vertical boxes (105) embedded in the ring plate (101), the embedded vertical boxes (105) being provided with a vertical heater (1051) and a photoelectric distance probe (1052), a molded plastic part (5) being arranged inside the ring plate (101), and a plurality of dry convection spaces (6) being formed between the outer ring surface of the molded plastic part (5) and the inner ring surface of the ring plate (101); A support assembly (2) comprising a bottom plate (201) and an inner plate (202), wherein the bottom plate (201) is rotatably mounted below the ring plate (101), and the inner plate (202) is fixed above the bottom plate (201). Four pairs of positioning heat storage square rods (203) are fixedly mounted on the top surface of the inner plate (202), and a heat radiation gap (206) facing the vertical edge of the molded plastic part (5) is left between each pair of positioning heat storage square rods (203). The inner plate (202) is also provided with a plurality of exhaust holes (204) connected to the drying convection space (6); A capping and limiting assembly (3) comprises a top cover (301), an inner air cylinder (305) located on the bottom surface of the top cover (301), and a plurality of air cylinders (306) distributed on the annular side of the inner air cylinder (305), wherein the air cylinder (306) is in communication with the inner air cylinder (305), and each air cylinder (306) is driven to connect to a shaft (307), wherein the end of the shaft (307) is fixedly connected to an inner folding plate (308), wherein the inner folding plate (308) is movably connected to an outer folding plate (309) that matches the inner corner position of the molded plastic part (5), wherein a gap is reserved between the inner folding plate (308) and the outer folding plate (309), and a pressure sensing module (310) is embedded on the side of the inner folding plate (308) facing the outer folding plate (309); The driving assembly (4) comprises a servo motor (401) for driving the ring plate (101) to rotate back and forth within a central angle range of 90°.

2. The anti-deformation composite fiber pulp molding drying and heating device according to claim 1, characterized in that: The radius of the bottom plate (201) is greater than the radius of the inner plate (202); a lower bearing ring (104) is disposed on the periphery of the inner plate (202); and the lower bearing ring (104) is located between the top surface of the bottom plate (201) and the bottom surface of the ring plate (101).

3. The anti-deformation composite fiber pulp molding drying and heating device according to claim 1, characterized in that: A plurality of exhaust holes (204) are distributed in the peripheral area of ​​the molded plastic part (5); a plurality of exhaust pipes (205) are installed on the chassis (201); and each exhaust pipe (205) is independently connected to an exhaust hole (204).

4. The anti-deformation composite fiber pulp molding drying and heating device according to claim 1, characterized in that: The center of the top surface of the top cover (301) is fixedly connected to a main air pressure pipe (302), the main air pressure pipe (302) is in communication with an inner air cylinder (305), and a lifting connecting rod (304) for driving the top cover (301) to rise and fall is fixedly installed on the top surface of the top cover (301); The top surface of the top cover (301) is provided with a plurality of air inlet pipes (303), wherein an air inlet pipe (303) is independently configured directly above each drying convection space (6).

5. The anti-deformation composite fiber pulp molding drying and heating device according to claim 1, characterized in that: The bottom surface of the top cover (301) is provided with an upper bearing ring (102) that is in mating contact with the top surface of the ring plate (101).

6. The anti-deformation composite fiber pulp molding drying and heating device according to claim 1, characterized in that: The cylinder (306) has an electromagnetic valve (3061) built in, and the side end of the shaft (307) inserted into the cylinder (306) is provided with a piston structure that is in sliding contact with the inner wall of the cylinder (306).

7. The anti-deformation composite fiber pulp molding drying and heating device according to claim 1, characterized in that: The spacing between each exhaust hole (204) within the same drying convection space (6) and the side plate of the molded plastic part (5) is the same.

8. The anti-deformation composite fiber pulp molding drying and heating device according to claim 1, characterized in that: The bottom of the outer ring surface of the ring plate (101) is provided with a toothed ring (103), and the driving assembly (4) comprises a driving gear (402) connected to the output shaft of the servo motor (401), and the driving gear (402) is meshingly connected to the toothed ring (103).

9. A method for drying and heating deformation-resistant composite fiber pulp molding, characterized in that: The anti-deformation composite fiber pulp molding drying and heating device according to any one of claims 1 to 8 comprises the following steps: Step 1: Loading the molded plastic part (5) into the inner periphery of the ring plate (101) by automated equipment. When loading, align the vertical edges of the molded plastic part (5) with the heat radiation gap (206) between the paired positioning heat storage square rods (203); Step 2: The lifting device drives the cover stopper assembly (3) to descend. After the cover stopper assembly (3) has descended to its proper position, the air pressure device acts on each cylinder (306) through the inner air cylinder (305). Each cylinder (306) pushes its own shaft (307) to move outward. The shaft (307) drives the inner folding plate (308) and the outer folding plate (309) to move toward the inner corner position of the molded plastic part (5). When the pressure sensing module (310) of the inner folding plate (308) at any position detects that the pressure increases, the cylinder (306) at the current position stops pushing the shaft (307) to move and locks the internal air pressure of the cylinder (306), and the current pressure parameter is recorded as Wa; Step three, all vertical heaters (1051) are started to heat and dry the molded plastic part (5), and at the same time, the photoelectric distance probe (1052) detects the distance between the vertical heater (1051) and the molded plastic part (5); Wherein, assuming that the heating power of the vertical heater (1051) is Px, and the distance between the photoelectric distance probe (1052) and the molded plastic part (5) is Lx, then the heating power Px∝distance Lx; In step 4, when the vertical heater (1051) rotates to the vicinity of the vertical edge of the molded plastic part (5), the photoelectric distance sensor (1052) detects a sudden change signal of the distance shielding state of the positioning heat storage square rod (203), and the heating power of the vertical heater (1051) increases to Pn, where Pn=Px+ΔP, wherein ΔP is a preset heating power increment; Step five, pre-set condition one: when the photoelectric distance sensor (1052) detects the thermal radiation gap (206) between the two positioning heat storage square rods (203); When condition 1 exists, the servo motor (401) stops and starts to drive the ring plate (101) to rotate in the reverse direction; Step six, when the vertical heater (1051) is started, the air inlet pipe (303) and the exhaust pipe (205) simultaneously perform airflow input and output operations; Step seven, when the pressure sensing module (310) detects that the pressure is not lower than a preset reference pressure Ws, the dynamic drying of the molded plastic part (5) is stopped, and after a delay of t seconds, the air flow in the air inlet pipe (303) and the exhaust pipe (205) is stopped, wherein Ws>Wa; In step eight, the servo motor (401) drives the vertical heater (1051) to reset, and the air pressure device acts on each cylinder (306) through the inner air cylinder (305). Each cylinder (306) pushes its own shaft (307) to retract, and the inner folding plate (308) and the outer folding plate (309) are separated from the inner corner position of the molded plastic part (5). The lifting device drives the sealing limit assembly (3) to rise, and the molded plastic part (5) is taken out of the inner ring plate (101) by the automation equipment.

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