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

Abstract

The present invention discloses a device and method for drying and heating deformation-resistant composite fiber pulp molding, and relates to the technical field of paper and plastic drying. In the present invention, the dynamic heating component includes a ring plate, a plurality of embedded vertical boxes embedded in the ring plate, and the embedded vertical boxes are equipped with a vertical heater and a photoelectric distance probe. The supporting component includes a chassis and an inner plate. The chassis is rotatably mounted below the ring plate, and the inner plate is fixed above the chassis. Four pairs of positioning and heat storage square rods are fixedly mounted on the top surface of the inner plate. The sealing and limiting component includes a top cover, an inner air cylinder located on the bottom surface of the top cover, and a plurality of air cylinders distributed on the annular side of the inner air cylinder, and the air cylinders are connected to the inner air cylinder. A gap is reserved between the inner folding plate and the outer folding plate, and a pressure sensing module is embedded on the side of the inner folding plate facing the outer folding plate. The driving component includes a servo motor for driving the ring plate to rotate. The present invention ensures the synchronous coordination of the drying degree of the edges of the molded plastic parts with the drying degree of other positions, and effectively avoids quality problems caused by insufficient or excessive local drying.

Description

Technical Field

[0001] The invention relates to the technical field of paper-plastic drying, in particular to a device and method for drying and heating deformation-resistant composite fiber pulp molding. Background Art

[0002] When paper-plastic products are currently dried, the edges of composite fiber pulp molded products are relatively thicker than other locations. During the drying process, if conventional uniform heating methods are used, it is difficult for the edges to obtain sufficient heat to achieve sufficient drying, and other thinner parts may suffer from quality problems such as deformation and brittleness due to excessive heating, affecting the overall quality of the product.

[0003] For example, when existing drying kilns heat and dry paper plastic products, the temperature at each location in the drying kiln is the same. However, because of the same temperature, the edges of the paper plastic are not completely dried yet, while other locations of the paper plastic have already dried to the standard. If the edges of the paper plastic are to be completely dried, other locations of the paper plastic will be over-dried.

[0004] In summary, when drying paper-plastic products, ensuring the synchronization and coordination of the drying degree of the paper-plastic edges with other positions to avoid the occurrence of local insufficient drying or excessive drying has become a problem that needs to be solved. Summary of the Invention

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention provides a deformation-resistant composite fiber pulp molding drying and heating device, comprising:

[0007] The dynamic heating component includes a ring plate and multiple embedded vertical boxes embedded in the ring plate. The embedded vertical boxes are equipped with vertical heaters and photoelectric distance probes. The ring plate is surrounded by molded plastic parts, and multiple dry convection spaces are formed between the outer ring surface of the molded plastic parts and the inner ring surface of the ring plate.

[0008] The supporting assembly includes a chassis and an inner plate. The chassis is rotatably installed under the ring plate, and the inner plate is fixed above the chassis. Four pairs of positioning heat storage square rods are fixedly installed on the top surface of the inner plate. A heat radiation gap is left between each pair of positioning heat storage square rods facing the vertical edges of the molded plastic parts. The inner plate is also provided with multiple exhaust holes connected to the dry convection space.

[0009] The capping limit assembly includes a top cover, an inner air cylinder located on the bottom surface of the top cover, and multiple cylinders distributed on the ring side of the inner air cylinder. The cylinders are connected to the inner air cylinder. Each cylinder drives a shaft rod, the end of the shaft rod is fixedly connected to the inner folding plate, and the inner folding plate is movably connected to the outer folding plate that matches the inner corner position of the molded plastic part. A gap is reserved between the inner folding plate and the outer folding plate, and a pressure sensing module is embedded in the side of the inner folding plate facing the outer folding plate.

[0010] The driving assembly includes a servo motor for driving the ring plate to rotate back and forth within a 90° central angle range.

[0011] As an optimal technical solution of the drying and heating device of the present invention: the radius of the bottom plate is larger than the radius of the inner plate, a lower bearing ring is arranged on the periphery of the inner plate, and the lower bearing ring is located between the top surface of the bottom plate and the bottom surface of the ring plate.

[0012] 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, a plurality of exhaust pipes are installed on the chassis, and each exhaust pipe is independently connected to an exhaust hole.

[0013] As a preferred technical solution for the drying and heating device of the present invention, a main air pressure pipe is fixedly connected to the center of the top surface of the top cover, which is connected to the inner air cylinder. A lifting rod for driving the top cover is fixedly mounted on the top surface. Multiple air inlet pipes are provided on the top surface of the top cover, with one independent air inlet pipe being located directly above each drying convection space.

[0014] As a preferred technical solution of the drying and heating device of the present invention: the bottom surface of the top cover is provided with an upper bearing ring which is in contact with the top surface of the ring plate.

[0015] As a preferred technical solution of the drying and heating device of the present invention: an electromagnetic valve is built into the cylinder, and the side end of the shaft inserted into the cylinder is provided with a piston structure in sliding contact with the inner wall of the cylinder.

[0016] As a preferred technical solution of the drying and heating device of the present invention, the distances between the exhaust holes and the side panels of the molded plastic parts within the same drying convection space are the same.

[0017] As a preferred technical solution of the drying and heating device of the present invention: a gear ring is configured at the bottom of the outer ring surface of the ring plate, and the driving assembly includes a driving gear connected to the output shaft of the servo motor, and the driving gear is meshed with the gear ring.

[0018] The present invention provides a method for drying and heating deformation-resistant composite fiber pulp molding, which includes the following steps:

[0019] In step one, the molded plastic parts are loaded into the inner periphery of the ring plate through automated equipment. During loading, the vertical edges of the molded plastic parts are aligned with the heat radiation gap between the paired positioning heat storage square rods.

[0020] In the second step, the lifting equipment drives the cover limit assembly to descend. After the cover limit assembly descends into place, the pneumatic equipment acts on each cylinder through the inner air cylinder. Each cylinder pushes its own shaft to move outward, and the shaft drives the inner folding plate and the outer folding plate to move toward the inner corner position of the molded plastic part.

[0021] When the pressure sensing module of the inner folding plate at any position detects an increase in pressure, the cylinder at the current position stops pushing the shaft to move and locks the internal air pressure of the cylinder. The current pressure parameter is recorded as Wa.

[0022] In the third stage, all vertical heaters are started to heat and dry the molded plastic parts. At the same time, the photoelectric distance probe detects the distance between the vertical heaters and the molded plastic parts.

[0023] Assume that the heating power of the vertical heater is Px, and the distance between the photoelectric distance probe and the molded plastic part is Lx, then the heating power Px∝distance Lx.

[0024] In step four, when the vertical heater rotates to the vicinity of the vertical edge of the molded plastic part, the photoelectric distance sensor detects a sudden change signal of the distance obstruction state of the positioning heat storage square rod, and the heating power of the vertical heater increases to Pn, Pn=Px+ΔP, where ΔP is the preset heating power increment.

[0025] Step 5, Preset Condition 1: When the photoelectric distance sensor detects the heat radiation gap between the two positioning heat storage square rods. When condition 1 exists, the servo motor stops and starts to drive the ring plate to rotate in the opposite direction.

[0026] Step six: When the vertical heater is started, the air intake pipe and exhaust pipe perform airflow input and output operations synchronously.

[0027] 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 molded plastic parts is stopped. After a delay of t seconds, the air flow in the intake pipe and exhaust pipe stops, where Ws>Wa.

[0028] In step eight, the servo motor drives the vertical heater to reset, and the pneumatic equipment acts on each cylinder through the inner air cylinder. Each cylinder pushes its own shaft to retract, and the inner folding plate and the outer folding plate are separated from the inner corner position of the molded plastic part. The lifting equipment drives the sealing limit assembly to rise, and the molded plastic part is taken out of the inner ring plate through the automated equipment.

[0029] Compared with the existing technology, the beneficial effects of the present invention are:

[0030] 1. In this invention, the vertical heater of the dynamic heating assembly adjusts heating power based on feedback from a photoelectric distance sensor. During conventional heating, the heater output intensity is controlled in a positive correlation with the heating distance. Power increases when approaching the edge of a molded plastic part, meeting the increased heat demand of the thick edge. Positioning heat storage rods are used to prevent thermal damage to the edge of the molded part when the heater is too close. Simultaneously, the heat output of the heat-absorbing heater provides a continuous and stable drying heat supply to the edge of the molded part, ensuring the drying degree of the molded part edge is synchronized and coordinated with the drying degree of other locations, effectively avoiding quality problems caused by insufficient or excessive local drying.

[0031] 2. The servo motor of the drive assembly designed in the present invention drives the ring plate to rotate back and forth 90 degrees, and can be used with conventional wiring for power supply, avoiding a complex brush structure and reducing the risk of failure.

[0032] 3. The heating method designed in the present invention controls the heating power, ring plate rotation and drying process based on the sensor signal. When a heat radiation gap is detected, the ring plate rotates in the opposite direction; when the pressure sensing module monitors that the pressure reaches the standard, the drying is stopped, realizing automated and intelligent operation, reducing manual intervention, and improving the accuracy and stability of paper-plastic products. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the overall structure of the drying and heating device of the present invention;

[0034] Figure 2 This is a schematic diagram of the disassembled structure of the components of the drying and heating device of the present invention;

[0035] Figure 3 Schematic bottom view of the dynamic heating assembly of the present invention;

[0036] Figure 4 Schematic bottom view of the dynamic heating assembly of the present invention;

[0037] Figure 5 Schematic diagram of the upper structure of the support assembly in the present invention;

[0038] Figure 6 Schematic top view of the molded plastic part in the present invention when it is located inside the drying and heating device;

[0039] Figure 7 for Figure 6 Schematic diagram of the structure with a partial enlargement at point A in the middle.

[0040] Among them: 1-dynamic heating component, 101-ring plate, 102-upper bearing ring, 103-tooth ring, 104-lower bearing ring, 105-embedded vertical box, 1051-vertical heater, 1052-photoelectric distance probe; 2-support component, 201-chassis, 202-inner plate, 203-positioning heat storage square rod, 204-exhaust hole, 205-exhaust pipe, 206-thermal radiation gap; 3-covering and limiting component, 301-top cover, 302-main air pressure pipe, 303-intake pipe, 304-lifting connecting rod, 305-inner air cylinder, 306-cylinder, 3061-solenoid 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-molded plastic parts; 6-drying convection space. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to 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 intended to limit the present invention.

[0042] Example 1: The present invention designs a deformation-resistant composite fiber pulp molding drying and heating device, combined with Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 , mainly equipped with dynamic heating component 1, support component 2, capping and limiting component 3, and driving component 4. The specific structural configuration is as follows:

[0043] (1) Dynamic heating component 1: Combination Figure 3 、 Figure 6 The drying machine comprises a ring plate 101 and multiple vertically embedded boxes 105 embedded within the ring plate 101. Vertical heaters 1051 are located within the vertically embedded boxes 105 for heating, and photoelectric distance sensors 1052 are used to detect the distance to the molded plastic parts 5. The molded plastic parts 5 are placed within the ring plate 101, with multiple drying convection spaces 6 formed between them to provide space for air circulation during the drying process.

[0044] (2) Support component 2: combination Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 、 Figure 7The inner plate 202 comprises a base plate 201 and an inner plate 202. The base plate 201 is rotatably mounted beneath the ring plate 101, providing support for its rotation. The inner plate 202 is fixed to the base plate 201. Its top surface features four pairs of metal positioning and heat-storage square rods 203, which store and radiate heat toward the edges of the molded plastic part 5. The heat-radiating gaps 206 between each pair of positioning and heat-storage square rods 203 align with the vertical edges of the molded plastic part 5, facilitating direct heat transfer from the vertical heater 1051 and enabling the photoelectric distance sensor 1052 to detect the gap signal, thereby reversing the servo motor 401. The inner plate 202 also has multiple exhaust holes 204 connected to the drying convection space 6 to exhaust moisture generated during the drying process. These exhaust holes 204 are distributed around the periphery of the molded plastic part 5. The base plate 201 is equipped with multiple exhaust pipes 205, each independently connected to an exhaust hole 204 to ensure smooth moisture discharge.

[0045] (III) Capping limiter assembly 3: Combination 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 multiple cylinders 306 distributed around the inner air cylinder 305. The cylinders 306 are connected to the inner air cylinder 305 and are driven by air pressure. Each cylinder 306 drives a connecting shaft 307, the end of which is fixedly connected to an inner folding plate 308. The inner folding plate 308 is movably connected to an outer folding plate 309. The outer folding plate 309 cooperates with the inner corner position of the molded plastic part 5 to fix the molded plastic part 5. A gap is reserved between the inner folding plate 308 and the outer folding plate 309. A pressure sensor module 310 is embedded on the side of the inner folding plate 308 facing the outer folding plate 309 to detect the pressure between the outer folding plate 309 and the molded plastic part 5.

[0046] Combine Figure 1 、 Figure 4 、 Figure 6 The center of the top surface of the top cover 301 is fixedly connected to a main air pressure pipe 302, which communicates with an inner air cylinder 305 and provides air pressure to the cylinder. A pneumatic device is also connected upstream of the main air pressure pipe 302. A lifting link 304 is fixedly mounted on the top surface of the top cover 301. The lifting device is connected above the lifting link 304 to drive the top cover 301 up and down. Multiple air inlet pipes 303 are located on the top surface of the top cover 301, one for each drying convection chamber 6, to supply dry air.

[0047] Combine Figure 1 、 Figure 3 、 Figure 4 、 Figure 6The bottom surface of the top cover 301 is equipped with an upper bearing ring 102 that mates with the top surface of the ring plate 101, reducing friction between the top cover 301 and the ring plate 101 and ensuring smooth operation of the device. The cylinder 306 is equipped with a built-in solenoid valve 3061, which, in conjunction with the pneumatic equipment, controls the cylinder's air intake and exhaust. The side end of the shaft 307 inserted into the cylinder 306 is equipped with a piston structure that slides against the inner wall of the cylinder 306, ensuring the stability and sealing of the cylinder drive.

[0048] (IV) Drive Component 4: Combination Figure 1 、 Figure 3 , primarily consisting of a servo motor 401 and a drive gear 402. The servo motor 401 is used to drive the ring plate 101 to rotate back and forth within a 90° central angle range. A toothed ring 103 is configured at the bottom of the outer ring surface of the ring plate 101. The drive gear 402 is connected to the output shaft of the servo motor 401 and meshes with the toothed ring 103 to achieve rotational drive of the ring plate 101. This conventional wiring structure can meet the normal power supply operation of the vertical heater 1051 and the photoelectric distance sensor 1052, eliminating the need for a complex brush structure and reducing the risk of failure.

[0049] Example 2: The present invention designs a method for drying and heating deformation-resistant composite fiber pulp molding, the specific contents of which are as follows:

[0050] Step 1: Loading the molded plastic parts: Use automated equipment to load the molded plastic parts 5 into the inner periphery of the ring plate 101. When loading, align the vertical edges of the molded plastic parts 5 with the heat radiation gap 206 between the paired positioning heat storage square rods 203 to ensure that the edges can better receive heat.

[0051] Step 2: Securing the Molded Plastic Part: The lifting device drives the capping and limiting assembly 3 downward. Once the capping and limiting assembly 3 is in place, the air pressure device acts on each cylinder 306 via the inner air cylinder 305. Each cylinder 306 pushes its respective shaft 307 outward, which in turn drives the inner and outer folding plates 308 and 309 toward the inner corner of the molded plastic part 5. When the pressure sensor module 310 of the inner folding plate 308 detects an increase in pressure at any position, indicating that the outer folding plate 309 has contacted the molded plastic part 5, the cylinder 306 at the current position stops pushing the shaft 307 and locks the internal air pressure of the cylinder 306. The current pressure parameter is recorded as Wa, thus completing the securing of the molded plastic part 5.

[0052] Step 3: Heating, Drying, and Distance Detection: All vertical heaters 1051 are activated to begin heating and drying the molded plastic part 5. Simultaneously, the photoelectric distance sensor 1052 detects the distance between the vertical heaters 1051 and the molded plastic part 5. The heating power Px of the vertical heaters 1051 is positively correlated with the distance Lx detected by the photoelectric distance sensor 1052; that is, heating power Px ∝ distance Lx, enabling dynamic adjustment of heating power based on distance.

[0053] Link 4: Increase in edge heating power: When the vertical heater 1051 rotates to the vicinity of the vertical edge of the molded plastic part 5, the photoelectric distance probe 1052 detects a sudden change signal in the distance blocking state of the positioning heat storage square rod 203, and the heating power of the vertical heater 1051 increases to Pn, Pn=Px+ΔP, where ΔP is a preset heating power increment to meet the edge's demand for more heat.

[0054] Step 5: Ring Plate Reverse Rotation: The pre-set condition is that the photoelectric distance sensor 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 begins to drive the ring plate 101 in reverse rotation, causing the vertical heater 1051 to move back and forth within a 90° angle range, uniformly heating the molded plastic part 5.

[0055] Step 6: Airflow circulation operation: When the vertical heater 1051 is started, the air inlet pipe 303 and the exhaust pipe 205 perform airflow input and output operations synchronously to ensure airflow circulation in the drying convection space 6 and improve drying efficiency.

[0056] Step 7: Stop drying: When the pressure sensing module 310 detects that the pressure is not lower than the preset reference pressure Ws (Ws>Wa), it means that the molded plastic part 5 has shrunk and tightened to a certain extent during drying. 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.

[0057] During the heating and drying process, the molded plastic part 5 shrinks to a certain extent, tightening inward. This gradually increases the pressure on the outer folding plate 309, allowing the pressure sensing module 310 to detect the extent of shrinkage. This corresponds to the initial compression signal detected by the pressure sensing module 310 when the outer folding plate 309 and the molded plastic part 5 initially come into contact before heating, forming a corresponding relationship with the start of heating and drying.

[0058] Step 8: Removing the molded plastic part: The servo motor 401 drives the vertical heater 1051 to reset, and the air pressure equipment 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 equipment drives the sealing limit assembly 3 to rise, and finally the molded plastic part 5 is removed from the inner ring plate 101 by the automated equipment.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection 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 equipped with a vertical heater (1051) and a photoelectric distance probe (1052), a molded plastic part (5) being arranged within the ring plate (101), and a plurality of dry convection spaces (6) being formed between the outer annular surface of the molded plastic part (5) and the inner annular surface of the ring plate (101); A support assembly (2) comprising a chassis (201) and an inner plate (202), wherein the chassis (201) is rotatably mounted below the ring plate (101), and the inner plate (202) is fixed above the chassis (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 cylinder (305) located on the bottom surface of the top cover (301), and a plurality of cylinders (306) distributed on the annular side of the inner cylinder (305), wherein the cylinders (306) are in communication with the inner cylinder (305), and each 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), and 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), and 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) includes a servo motor (401) for driving the ring plate (101) to rotate back and forth within a 90° central angle range.

2. The anti-deformation composite fiber pulp molding drying and heating device according to claim 1, characterized in that: The radius of the chassis (201) is greater than the radius of the inner disk (202), and a lower bearing ring (104) is arranged on the periphery of the inner disk (202), and the lower bearing ring (104) is located between the top surface of the chassis (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), and 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 the main air pressure pipe (302), the main air pressure pipe (302) is in communication with the 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 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) is equipped with an electromagnetic valve (3061), and the side end of the shaft (307) inserted into the cylinder (306) is provided with a piston structure 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) and the side plate of the molded plastic part (5) within the same drying convection space (6) is the same.

8. The anti-deformation composite fiber pulp molding drying and heating device according to claim 1, characterized in that: A toothed ring (103) is provided at the bottom of the outer ring surface of the ring plate (101), and the drive assembly (4) comprises a drive gear (402) connected to the output shaft of the servo motor (401), and the drive gear (402) is meshedly 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: Load the molded plastic part (5) into the inner periphery of the ring plate (101) through 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); In the second step, the cover limiting assembly (3) is driven to descend by the lifting device. After the cover limiting assembly (3) is lowered into place, 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 an increase in pressure, 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; In 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 blocking state of the positioning heat storage square rod (203), and the heating power of the vertical heater (1051) increases to Pn, Pn=Px+ΔP, where ΔP is a preset heating power increment; Link 5, pre-set condition 1: when the photoelectric distance probe (1052) detects the heat 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) perform airflow input and output operations synchronously; Step seven: when the pressure sensing module (310) detects that the pressure is not lower than the 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 from the inner ring plate (101) by the automation equipment.

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