A plastic hollow plate setting and cooling device and method

Abstract

This invention discloses a shaping and cooling device and method for plastic hollow boards, belonging to the field of plastic hollow board processing technology. The shaping and cooling device includes a processing table. A vacuum adsorption control system and an air flotation support control system are respectively installed at both ends inside the processing table. Two sets of cooling mold mechanisms for cooling the plastic hollow boards are installed at both ends of the top of the processing table. Each set of molds in the cooling mold mechanism is equipped with a main cooling mechanism and an auxiliary cooling mechanism for cooling. This invention utilizes the vacuum groove and vacuum holes on the upper mold to form a uniform negative pressure, forcing the board to conform to the cavity to ensure the cross-sectional shape. The lower mold forms an air film support through air jet grooves and air jet micro-holes, which not only counteracts the upward pulling force of vacuum adsorption and the weight of the board itself, but also converts the sliding friction between the board and the lower mold into gas lubrication friction. This solves the problem of board top bulging and hollow cavity collapse caused by excessive unilateral adsorption force in traditional shaping processes.

Description

Technical Field

[0001] This invention belongs to the field of plastic hollow board processing technology, specifically relating to a plastic hollow board shaping and cooling device and method. Background Technology

[0002] Plastic hollow sheets are widely used in packaging, construction, logistics and other fields due to their advantages such as light weight, high strength and corrosion resistance. In the molding process, the shaping and cooling of the molten blank after extrusion is a key process that determines the dimensional accuracy, surface quality and mechanical properties of the product. At present, the mainstream shaping and cooling devices for plastic hollow sheets in the industry mostly adopt a single vacuum adsorption shaping + single-sided water cooling structure. Specifically, the upper mold generates negative pressure through vacuum holes / grooves to adsorb and fit the molten blank into the cavity to maintain the cross-sectional shape, while the lower mold only serves as a support platform, and basic cooling is achieved in conjunction with the cooling water channel.

[0003] In actual production, traditional equipment relies solely on the vacuum suction force of the upper mold to fix the billet. Under negative pressure, the billet is subjected to downward pulling force, and its own weight intensifies the contact pressure between the billet and the lower mold, leading to increased sliding friction resistance. This not only easily causes scratches on the sheet surface and deviation during traction, but also causes problems such as top bulging of the sheet, collapse of the hollow cavity, and uneven wall thickness due to uneven force. Furthermore, the cooling system of traditional equipment is mostly a single-level cooling water channel design with a sparse cooling circuit layout and limited coverage, making it difficult to achieve uniform cooling of the mold. At the same time, the heat exchange efficiency of traditional equipment is limited by the single cooling method, and the surface solidification speed of the molten billet is slow. A longer forming table is required to ensure cooling time, which not only increases the equipment footprint and production cost, but also reduces the overall operating cycle of the production line, making it difficult to meet the needs of large-scale, high-efficiency production. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a plastic hollow board shaping and cooling device.

[0005] The technical solution adopted to solve the above-mentioned technical problems is: a plastic hollow board shaping and cooling device, including a processing table, a vacuum adsorption control system and an air flotation support control system respectively installed at both ends inside the processing table, two sets of cooling mold mechanisms for cooling the plastic hollow board are installed at both ends of the top of the processing table, and a main cooling mechanism and an auxiliary cooling mechanism are installed on both sets of molds of the cooling mold mechanism for cooling, an adsorption mechanism providing adsorption force is installed at the top inside the cooling mold mechanism, an air flotation mechanism providing upward air buoyancy is installed at the bottom inside the cooling mold mechanism, and a control panel is installed at the middle position on one side of the processing table.

[0006] Furthermore, the cooling mold mechanism includes a base plate, of which two sets are provided, and both sets of base plates are located on the top of the processing table. Slide rods are symmetrically installed at the four corners of the top of the base plate, and a top plate is installed at the top of the four sets of slide rods. U-shaped frames are symmetrically arranged between the base plate and the top plate, and upper and lower molds are symmetrically installed inside the two sets of U-shaped frames. Lifting frames sleeved on the slide rods are symmetrically installed on both sides of the U-shaped frames. Several sets of electric telescopic rods fixedly connected to an adjacent set of U-shaped frames are symmetrically installed on the top of the base plate and the bottom of the top plate. The two sets of main cooling mechanisms are symmetrically arranged inside the upper mold and the lower mold, respectively. The two sets of auxiliary cooling mechanisms are symmetrically arranged inside the upper mold and the lower mold, respectively.

[0007] Through the above technical solution, during operation, the electric telescopic rod drives the lifting frame to rise and fall along the slide bar according to the thickness of the hollow board, which drives the U-shaped frame to adjust the cavity gap between the upper and lower molds, so as to achieve precise adjustment of the cavity gap, adapt to the shaping requirements of hollow boards of different thicknesses, eliminate the need to change molds, reduce downtime for mold changing, improve production flexibility, and at the same time provide a stable mounting carrier for the main cooling mechanism and the auxiliary cooling mechanism, ensuring the fit between the cooling system and the mold.

[0008] Furthermore, the main cooling mechanism includes a water supply horizontal pipe. Water supply horizontal pipes are symmetrically installed at the bottom of both sides of the upper and lower molds. Water outlet horizontal pipes are symmetrically installed at the middle positions of both sides of the upper and lower molds. Water inlet channels are evenly and longitudinally opened at the bottom of both the upper and lower molds. The two sets of ports of the water inlet channels on both sides of the upper and lower molds are respectively connected to the interior of the two sets of water supply horizontal pipes on the same side. Water outlet channels are evenly and longitudinally opened at the middle positions of both the upper and lower molds, corresponding to the positions of the water inlet channels. The two sets of ports of the water outlet channels on both sides of the upper and lower molds are respectively connected to the interior of the two sets of water outlet horizontal pipes on the same side. The water inlet channels and water outlet channels are connected at the middle positions via a connecting channel. One end of the water supply horizontal pipe is connected to the output end of an external water supply system via a first valve, and one end of the water outlet horizontal pipe is connected to the return end of an external water supply system via a second valve. The water inlet channels and water outlet channels have the same diameter, and the diameter of the connecting channel is larger than the diameter of the water inlet channels.

[0009] The above technical solution constitutes a longitudinal cooling circuit consisting of an inlet channel, an outlet channel, a connecting channel, a water supply horizontal pipe, an outlet horizontal pipe, a first valve, and a second valve. During operation, the cooling water circulates through the first valve → water supply horizontal pipe → inlet channel → connecting channel → outlet channel → outlet horizontal pipe → second valve. The diameter of the connecting channel is larger than that of the inlet channel, which reduces the water flow resistance and achieves uniform cooling of the mold base.

[0010] Furthermore, the auxiliary cooling mechanism includes an inlet longitudinal pipe and an outlet longitudinal pipe. Two sets of inlet longitudinal pipes are installed at one end of the upper mold and the lower mold, and two sets of outlet longitudinal pipes are installed at the other end of the upper mold and the lower mold. The two sets of outlet longitudinal pipes are symmetrically distributed with the two sets of inlet longitudinal pipes. Two rows of cooling channels are evenly opened laterally in the middle position inside the upper mold and the lower mold. The two sets of ports at both ends of the cooling channels are connected to the inlet longitudinal pipe and the outlet longitudinal pipe on the same side, respectively. The bottom row of cooling channels is located between the inlet channel and the outlet channel, and the top row of cooling channels is located above the outlet channel. A third valve connected to the output end of the external water supply system is installed at one end of the inlet longitudinal pipe, and a fourth valve connected to the return end of the external water supply system is installed at one end of the outlet longitudinal pipe. The diameter of the cooling channel is larger than the diameter of the inlet channel.

[0011] The above technical solution consists of an auxiliary cooling channel, which is distributed at intervals with the main cooling circuit, consisting of a cooling channel, an inlet longitudinal pipe, an outlet longitudinal pipe, a third valve, and a fourth valve. During operation, the cooling water circulates through the third valve → inlet longitudinal pipe → cooling channel → outlet longitudinal pipe → fourth valve. The cooling channel is located in the gap of the main cooling channel and has a larger diameter, which enhances the heat exchange efficiency and forms a double-layer synergistic cooling with the main cooling mechanism. The double-layer cooling channel is distributed at intervals, which expands the cooling coverage area of ​​the mold, realizes efficient cooling of the blank on both sides, accelerates the surface solidification speed, and shortens the shaping cycle.

[0012] Furthermore, the adsorption mechanism includes two sets of first connecting pipes located on both sides of the upper mold. The bottom end of the first connecting pipe is connected to the input end of the vacuum adsorption control system inside the processing table. A row of vacuum grooves is uniformly and longitudinally opened at the bottom of the upper mold. A row of vacuum holes is uniformly and vertically opened inside the vacuum grooves, and the top end of the vacuum holes is located at the top of the upper mold. The vacuum grooves and connecting channels are spaced apart. A row of first strip tubes is uniformly and longitudinally installed at the top of the upper mold. The top end of each row of vacuum holes is connected to the interior of the adjacent set of first strip tubes. Each row of first strip tubes is spaced apart from the water inlet channel and the cooling channel. Two rows of vacuum regulating valves are installed on both sides of the top of the U-shaped frame. The input end of each set of vacuum regulating valves is connected to the interior of a set of first strip tubes. The sum of the number of vacuum regulating valves in the two rows is the same as the number of first strip tubes in one row. A second strip tube is installed at the input end of each row of vacuum regulating valves. The interior of the second strip tube is connected to the top end of the adjacent set of first connecting pipes.

[0013] The above technical solution comprises a zoned negative pressure system consisting of a vacuum tank, a vacuum hole, a first strip tube, a vacuum regulating valve, a second strip tube, and a first connecting pipe. During operation, the negative pressure generated by the vacuum adsorption control system is conducted through the first connecting pipe → second strip tube → vacuum regulating valve → first strip tube → vacuum tank → vacuum hole, forming a uniform negative pressure field on the surface of the upper mold. The vacuum tank and connecting channel are spaced apart to avoid interference between cooling and the vacuum structure. The combined design of the vacuum tank and vacuum hole expands the negative pressure area, allowing the billet to fit evenly into the cavity, accurately locking the cross-sectional shape of the hollow plate, and preventing the cavity from collapsing. The vacuum regulating valve enables zoned negative pressure control, with low pressure at the inlet section for drag reduction, high pressure in the middle section for shaping, and low pressure at the outlet section for transition, improving shaping accuracy.

[0014] Furthermore, the air flotation mechanism includes a second connecting pipe located on one side of the lower mold. The bottom end of the second connecting pipe is connected to the input end of the air flotation support control system inside the processing table. A row of air jet grooves is evenly opened horizontally on the top of the lower mold. The air jet grooves are spaced apart from the cooling channels. A row of air jet micro-holes is evenly opened on the bottom of each group of air jet grooves. The bottom end of the air jet micro-holes is located at the bottom of the lower mold. Each row of air jet micro-holes is spaced apart from a row of water inlet channels. A row of air collection chambers is evenly installed horizontally on the bottom of the lower mold. The bottom end of each row of air jet micro-holes is connected to the interior of the adjacent group of air collection chambers. A third strip pipe connected to the top end of the second connecting pipe is installed at one end of the bottom of the lower mold. A pressure regulating valve connected to the interior of the third strip pipe is installed at one end of the air collection chamber.

[0015] The above technical solution comprises an air film support system consisting of an air jet channel, air jet micro-holes, an air collection chamber, a third strip pipe, a pressure regulating valve, and a second connecting pipe. During operation, compressed air is ejected through the second connecting pipe → third strip pipe → pressure regulating valve → air collection chamber → air jet micro-holes → air jet channel, forming a uniform air film on the surface of the lower mold to balance the adsorption force of the upper mold. The air jet channel and cooling channel are spaced apart to balance air buoyancy and cooling effects. The air film support counteracts the vacuum adsorption force and the weight of the billet, preventing the top of the plate from bulging due to excessive force on one side. At the same time, it converts sliding friction into gas lubrication friction, reducing traction resistance and preventing scratches on the plate. The pressure regulating valve precisely controls the air jet pressure to achieve a dynamic balance between air buoyancy and adsorption force, adapting to the support needs of plates of different thicknesses.

[0016] Furthermore, one end of the jet groove is close to the edge of the lower mold, and the other end of the jet groove has an exhaust opening, which is located on the end face of one end of the lower mold. The depth of the jet groove gradually decreases from the end close to the exhaust opening to the other end.

[0017] Through the above technical solution, the structure of the jet groove is optimized and designed as a gradient depth + end exhaust opening. The depth gradually becomes shallower from the end near the exhaust opening to the other end. During operation, compressed air flows in the jet groove. The gradient depth design makes the airflow distribution more uniform. Excess airflow is discharged through the exhaust opening to avoid local high air pressure blowing up the billet. The exhaust opening releases pressure in time, reduces air pressure fluctuations inside the mold, and avoids the plate deviation caused by airflow impact.

[0018] Furthermore, the jet micro-orifice is inclined and perpendicular to the inner bottom surface of the jet groove.

[0019] With the above technical solution, during operation, compressed air is ejected through inclined micro-holes, and the airflow direction is more closely aligned with the lower surface of the billet, which enhances the support effect of the air film. The airflow sweeps the lower surface of the billet, which helps to improve the cooling efficiency. It also works in synergy with the water cooling of the upper mold to improve the overall cooling uniformity. Furthermore, it can reduce the traction force required for the traction equipment to pull the plastic hollow plate, and avoid the plastic hollow plate from being deformed due to excessive traction force.

[0020] Furthermore, symmetrical grooves are provided on the same end of both sides of the top of the processing table, and sliders are provided inside the grooves. The bottom of one set of base plates is fixedly connected to the top of the processing table, and the bottom of another set of base plates is fixedly connected to the top of the two sets of sliders. Electric push rods are symmetrically installed on both sides of the two sets of base plates that are close to each other.

[0021] The above technical solution controls the electric push rod to drive the slider to move along the slide groove, causing the two sets of cooling mold mechanisms to move closer or further away, adapting to the production of hollow boards of different widths, greatly improving the versatility of the equipment and reducing the investment cost of special molds.

[0022] The method of using a plastic hollow board shaping and cooling device includes the following steps:

[0023] 1. Based on the width of the plastic hollow board to be processed, start the electric push rod through the control panel to drive the slider to move in the slide groove and adjust the distance between the two sets of cooling mold mechanisms.

[0024] Second, based on the thickness of the sheet material, control the electric telescopic rod to drive the lifting frame to rise and fall along the slide bar, and fine-tune the cavity gap between the upper mold and the lower mold to ensure that the gap matches the thickness of the sheet material;

[0025] 3. Open the vacuum adsorption control system. The negative pressure enters the second strip tube through the first connecting tube, and is then distributed to the first strip tube through the vacuum regulating valve. Finally, a uniform negative pressure field is formed on the surface of the upper mold cavity through the vacuum groove and vacuum hole.

[0026] Fourth, at the same time, the air flotation support control system is turned on. Dry compressed air enters the third strip pipe through the second connecting pipe. After the pressure is adjusted by the pressure regulating valve, it is delivered to the air collection chamber and then sprayed into the air slot through the air jet micro-hole to form a uniform air film on the surface of the lower mold cavity.

[0027] Fifth, the cooling water from the external water supply system then enters the water supply horizontal pipe through the first valve, flows into the inlet channel, then enters the outlet channel through the connecting channel, flows through the outlet horizontal pipe, and then flows back through the second valve.

[0028] VI. At the same time, the cooling water from the external water supply system enters the inlet longitudinal pipe through the third valve, and flows back through the outlet longitudinal pipe via the fourth valve after passing through the cooling channel.

[0029] 7. After being shaped and cooled, the hollow plastic sheet is moved at a constant speed between the upper and lower molds by the traction machine.

[0030] The beneficial effects of the present invention are as follows: (1) The present invention uses the cooling mold mechanism, the adsorption mechanism and the air flotation mechanism in combination to form a uniform negative pressure by using the vacuum groove and vacuum hole on the upper mold to force the plate to fit the cavity to ensure the cross-sectional shape. The lower mold forms an air film support by using the air jet groove and air jet micro-hole. This not only offsets the upward pull force of vacuum adsorption and the weight of the plate itself, but also converts the sliding friction between the plate and the lower mold into gas lubrication friction. This completely solves the problem of plate top protrusion and hollow cavity collapse caused by excessive unilateral adsorption force in the traditional shaping process. At the same time, it avoids the scratches and deviation of the plate during the traction process, and significantly improves the uniformity of wall thickness and surface flatness of the hollow plate; (2) The present invention uses the cooling mold mechanism, the main cooling mechanism and the auxiliary cooling mechanism in combination to utilize the water inlet channel (longitudinal) and water outlet of the main cooling mechanism to form a uniform negative pressure by using the water inlet channel (longitudinal) and water outlet of the main cooling mechanism. The channel (longitudinal) and the connecting channel form a longitudinal cooling circuit, and the cooling channel (transverse) of the auxiliary cooling mechanism forms a transverse cooling circuit. The two form a crisscrossing cooling network to achieve uniform cooling of the mold base. The cooling channel of the auxiliary cooling mechanism is distributed at intervals with the main cooling channel to further expand the cooling coverage area and form a double-sided efficient cooling of the plate. (3) By optimizing the layout design of the cooling channel, the present invention greatly improves the heat exchange efficiency, so that the surface of the molten hollow plate can be quickly solidified to form a rigid shell, shortening the dwell time of the plate in the shaping mold. In addition, the auxiliary cooling effect of the air flotation support mechanism further accelerates the heat dissipation speed of the lower surface of the plate, forming a synergistic cooling effect with the water cooling shaping of the upper mold. Compared with the traditional single cooling method, the shaping efficiency is significantly improved, which can effectively shorten the length of the shaping table of the production line. Attached Figure Description

[0031] Figure 1 This is a first-view structural diagram of the present invention;

[0032] Figure 2This is a second-view structural diagram of the present invention;

[0033] Figure 3 This is a third-view structural diagram of the present invention;

[0034] Figure 4 This is a schematic diagram of the cooling mold mechanism of the present invention;

[0035] Figure 5 This is a first-view structural diagram showing the mold and adsorption mechanism separated in this invention;

[0036] Figure 6 This is a second-view structural diagram showing the mold and adsorption mechanism separated in this invention;

[0037] Figure 7 This is a first-view structural diagram of the mold of the present invention;

[0038] Figure 8 This is a second-view structural diagram of the mold of the present invention;

[0039] Figure 9 This is a schematic diagram of the cross-sectional structure of the mold of the present invention;

[0040] Figure 10 This is a schematic diagram of the first longitudinal section structure of the mold of the present invention;

[0041] Figure 11 This is a schematic diagram of the second longitudinal section structure of the mold of the present invention;

[0042] Figure 12 This is a first-view structural diagram showing the separation of the mold and the air flotation mechanism in this invention;

[0043] Figure 13 This is a second-view structural diagram showing the separation of the mold and the air flotation mechanism in this invention;

[0044] Figure 14 This is a schematic diagram of the structure of the mold of the present invention;

[0045] Figure 15 This is a schematic diagram of the first cross-sectional structure of the mold of the present invention;

[0046] Figure 16 This is a schematic diagram of the second cross-sectional structure of the mold of the present invention;

[0047] Figure 17 This is the present invention. Figure 5 A magnified view of a section at point A in the middle;

[0048] Figure 18 This is the present invention. Figure 6 A magnified view of a section at point B.

[0049] Reference numerals: 1. Processing table; 2. Cooling mold mechanism; 201. Base plate; 202. Top plate; 203. Slide rod; 204. Lifting frame; 205. U-shaped frame; 206. Upper mold; 207. Lower mold; 208. Electric telescopic rod; 3. Main cooling mechanism; 301. Water inlet channel; 302. Water outlet channel; 303. Connecting channel; 304. Water supply horizontal pipe; 305. Water outlet horizontal pipe; 306. First valve; 307. Second valve; 4. Auxiliary cooling mechanism; 401. Cooling channel; 402. Water inlet longitudinal pipe; 4 03. Water outlet longitudinal pipe; 404. Third valve; 405. Fourth valve; 5. Adsorption mechanism; 501. Vacuum tank; 502. Vacuum hole; 503. First strip tube; 504. Vacuum regulating valve; 505. Second strip tube; 506. First connecting pipe; 6. Air flotation mechanism; 601. Air jet tank; 602. Air jet micro-hole; 603. Air collection chamber; 604. Third strip tube; 605. Pressure regulating valve; 606. Second connecting pipe; 607. Exhaust opening; 7. Slide groove; 8. Slider; 9. Electric push rod; 10. Control panel. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this invention clearer, the 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 merely illustrative and not intended to limit the invention.

[0051] like Figures 1-16 and Figure 18As shown, a plastic hollow board shaping and cooling device of this embodiment includes a processing table 1. A vacuum adsorption control system and an air flotation support control system are respectively installed at both ends inside the processing table 1. Two sets of cooling mold mechanisms 2 for cooling the plastic hollow board are installed at both ends of the top of the processing table 1. Each set of molds in the cooling mold mechanism 2 is equipped with a main cooling mechanism 3 and an auxiliary cooling mechanism 4 for cooling. A control panel 10 is installed in the middle of one side of the processing table 1. The cooling mold mechanism 2 includes a base plate 201, with two sets of base plates 201, both sets of which are located on the top of the processing table 1. Slide rods 203 are symmetrically installed at the four corners of the top of the base plate 201. A top plate 202 is installed at the top of the four sets of slide rods 203. U-shaped frames 205 are symmetrically arranged between the bottom plate 201 and the top plate 202. An upper mold 206 and a lower mold 207 are symmetrically installed inside the two sets of U-shaped frames 205. Lifting frames 204, sleeved on sliding rods 203, are symmetrically installed on both sides of the U-shaped frames 205. Several sets of electric telescopic rods 208, fixedly connected to adjacent sets of U-shaped frames 205, are symmetrically installed on the top of the bottom plate 201 and the bottom of the top plate 202. Two sets of main cooling mechanisms 3 are symmetrically arranged inside the upper mold 206 and the lower mold 207, respectively. Two sets of auxiliary cooling mechanisms 4 are symmetrically arranged inside the upper mold 206 and the lower mold 207, respectively. Based on the thickness of the hollow plate to be processed, the electric telescopic rods 208 drive the lifting frames 204 to rise and fall along the sliding rods 203, thus moving the U-shaped frames 205. The cavity clearance between the upper mold 206 and the lower mold 207 is adjusted. The main cooling mechanism 3 includes a water supply horizontal pipe 304. Water supply horizontal pipes 304 are symmetrically installed at the bottom of both sides of the upper mold 206 and the lower mold 207. Water outlet horizontal pipes 305 are symmetrically installed at the middle positions of both sides of the upper mold 206 and the lower mold 207. Water inlet channels 301 are evenly and longitudinally opened at the bottom of both the upper mold 206 and the lower mold 207. The two sets of ports of the water inlet channels 301 on both sides of the upper mold 206 and the lower mold 207 are respectively connected to the interior of the two sets of water supply horizontal pipes 304 on the same side. Water outlet channels 302 are evenly and longitudinally opened at the middle positions of both the upper mold 206 and the lower mold 207, corresponding to the positions of the water inlet channels 301. The water outlet channels 302 are located on the upper mold... The two sets of ports on both sides of the mold 206 and the lower mold 207 are respectively connected to the interior of the two sets of horizontal water outlet pipes 305 on the same side. The middle position of the water inlet channel 301 and the water outlet channel 302 is connected by the connecting channel 303. One end of the water supply horizontal pipe 304 is connected to the output end of the external water supply system through the first valve 306, and one end of the water outlet horizontal pipe 305 is connected to the return end of the external water supply system through the second valve 307. The water inlet channel 301 and the water outlet channel 302 have the same diameter, and the diameter of the connecting channel 303 is larger than the diameter of the water inlet channel 301. The cooling water forms a longitudinal circulation loop through the first valve 306 → water supply horizontal pipe 304 → water inlet channel 301 → connecting channel 303 → water outlet channel 302 → water outlet horizontal pipe 305 → second valve 307.The large-diameter design of the connecting channel 303 reduces water flow resistance, achieving uniform cooling of the mold base. The dual-layer cooling channels are spaced apart to eliminate localized "hot spots" in the mold, preventing internal stress in the molten billet due to uneven cooling rates, and improving the flatness and mechanical stability of the sheet metal. The auxiliary cooling mechanism 4 includes an inlet longitudinal pipe 402 and an outlet longitudinal pipe 403. Two sets of inlet longitudinal pipes 402 are installed at one end of both the upper mold 206 and the lower mold 207, and two sets of outlet longitudinal pipes 403 are installed at the other end of both molds. The two sets of outlet longitudinal pipes 403 are connected to the two sets of inlet longitudinal pipes 402. 2. Symmetrical distribution: Two rows of cooling channels 401 are evenly spaced laterally at the middle position inside the upper mold 206 and lower mold 207. The two sets of ports at both ends of the cooling channels 401 are connected to the inlet longitudinal pipe 402 and outlet longitudinal pipe 403 on the same side, respectively. The bottom row of cooling channels 401 is located between the inlet channel 301 and the outlet channel 302, and the top row of cooling channels 401 is located above the outlet channel 302. One end of the inlet longitudinal pipe 402 is equipped with a third valve 404 connected to the output end of an external water supply system. The outlet longitudinal pipe... One end of 403 is equipped with a fourth valve 405 that connects to the return water end of an external water supply system. The diameter of the cooling channel 401 is larger than that of the inlet channel 301. Cooling water forms a transverse circulation loop by passing through the third valve 404 → inlet longitudinal pipe 402 → cooling channel 401 → outlet longitudinal pipe 403 → fourth valve 405. The cooling channel 401 is spaced apart from the main cooling channel and has a larger diameter, thus expanding the cooling coverage area. The main cooling mechanism 3 forms a longitudinal cooling loop, and the auxiliary cooling mechanism 4 forms a transverse cooling loop. The two form a crisscrossing cooling network, improving heat exchange efficiency and accelerating the billet cooling process. The surface curing speed of the material is improved, shortening the residence time of the sheet material in the mold and increasing the overall cycle time of the production line. Symmetrical grooves 7 are provided on the same end of both sides of the top of the processing table 1. Slider blocks 8 are installed inside the grooves 7. The bottom of one set of base plates 201 is fixedly connected to the top of the processing table 1, and the bottom of another set of base plates 201 is fixedly connected to the top of the two sets of sliders 8. Electric push rods 9 are symmetrically installed on both sides of the two sets of base plates 201, close to each other. According to the width of the sheet material, the electric push rods 9 push the sliders 8 along the grooves 7, adjusting the distance between the two sets of cooling mold mechanisms 2 to adapt to the shaping requirements of different sheet material specifications.

[0052] like Figures 5-11 and Figure 17As shown, the cooling mold mechanism 2 of this embodiment is provided with an adsorption mechanism 5 at its inner top, which provides adsorption force. The adsorption mechanism 5 includes two sets of first connecting pipes 506 located on both sides of the upper mold 206. The bottom end of the first connecting pipe 506 is connected to the input end of the vacuum adsorption control system inside the processing table 1. A row of vacuum grooves 501 is evenly and longitudinally opened at the bottom of the upper mold 206. A row of vacuum holes 502 is evenly and vertically opened inside the vacuum grooves 501, and the top end of the vacuum holes 502 is located at the top of the upper mold 206. The vacuum grooves 501 and the connecting channels 303 are distributed at intervals. A row of first strip tubes 503 is evenly and longitudinally installed at the top of the upper mold 206. The top end of each row of vacuum holes 502 is connected to the interior of the adjacent set of first strip tubes 503. Each row of first strip tubes 503 is distributed at intervals with the water inlet channel 301 and the cooling channel 401. Two rows of vacuum regulating valves 504 are installed on both sides of the top of the U-shaped frame 205, and each set of vacuum regulating valves 504 is connected to the interior of the adjacent set of first strip tubes 503. The input ends of valves 504 are connected to the interior of a set of first strip tubes 503. The sum of the number of two rows of vacuum regulating valves 504 is the same as the number of a row of first strip tubes 503. The input ends of each row of vacuum regulating valves 504 are connected to a second strip tube 505. The interior of the second strip tube 505 is connected to the top of an adjacent set of first connecting tubes 506. The negative pressure generated by the vacuum adsorption control system is conducted through the first connecting tube 506 → second strip tube 505 → vacuum regulating valve 504 → first strip tube 503 → vacuum tank 501 → vacuum hole 502, forming a uniform negative pressure on the surface of the upper mold 206 cavity, firmly adsorbing the molten blank onto the cavity wall, forcing the blank to conform to the preset cross-sectional shape. The connection channels 303 between the vacuum tank 501 and the main cooling mechanism are distributed at intervals. The first strip tubes 503 are staggered with the water inlet channel 301 and the cooling channel 401 to avoid interference between the vacuum pipeline and the cooling channel, ensuring the structural strength and functional stability of the mold.

[0053] like Figures 12-16As shown, the cooling mold mechanism 2 of this embodiment is provided with an air buoyancy mechanism 6 at its inner bottom, which provides upward air buoyancy. The air buoyancy mechanism 6 includes a second connecting pipe 606 located on one side of the lower mold 207. The bottom end of the second connecting pipe 606 is connected to the input end of the air buoyancy support control system inside the processing table 1. A row of air jet grooves 601 is evenly opened laterally on the top of the lower mold 207. The air jet grooves 601 are spaced apart from the cooling channel 401. A row of air jet micro-holes 602 is evenly opened at the inner bottom of each group of air jet grooves 601. The bottom end of the air jet micro-holes 602 is located at the lower mold 207. At the bottom of mold 7, each row of jet micro-holes 602 is spaced apart from a row of water inlet channels 301. A row of gas collection chambers 603 is horizontally and evenly installed at the bottom of the lower mold 207. The bottom end of each row of jet micro-holes 602 communicates with the interior of an adjacent group of gas collection chambers 603. A third strip pipe 604, communicating with the top of the second connecting pipe 606, is installed at one end of the bottom of the lower mold 207. A pressure regulating valve 605, communicating with the interior of the third strip pipe 604, is installed at one end of the gas collection chamber 603. One end of the jet groove 601 is close to the edge of the lower mold 207, and the other end of the jet groove 601... An exhaust opening 607 is provided at one end of the lower mold 207, and the exhaust opening 607 is located on the end face of one end. The depth of the jet groove 601 gradually decreases from one end near the exhaust opening 607 to the other end. The jet micro-holes 602 are inclined and perpendicular to the inner bottom surface of the jet groove 601. The dry compressed air output by the air flotation support control system is ejected through the second connecting pipe 606 → the third strip pipe 604 → the pressure regulating valve 605 → the air collection chamber 603 → the jet micro-holes 602 → the jet groove 601, forming a uniform air film on the surface of the cavity of the lower mold 207. It achieves the dual functions of "support and drag reduction + auxiliary cooling". The air film transforms the sliding friction between the billet and the lower mold into gas lubrication friction, which greatly reduces the resistance during the traction process, avoids the surface of the plate being scratched by the mold, and improves the appearance quality of the product. The air jet groove 601 adopts a depth gradient structure and has an exhaust opening 607 at the end, which makes the airflow distribution more uniform and allows excess airflow to be discharged in time, avoiding excessive local air pressure that blows up the billet. The air jet micro-holes 602 are set at an angle and perpendicular to the bottom surface of the air jet groove, so that the airflow direction is closer to the lower surface of the billet, while the airflow sweeps the surface of the billet to assist in cooling.

[0054] The working principle of this embodiment is as follows: Before use, the electric push rod 9 is controlled by the control panel 10 to move the slider 8 in the slide groove 7, adjusting the distance between the two sets of lower molds 207 to match the width of the sheet metal. Then, the electric telescopic rod 208 is controlled to drive the lifting frame 204 to rise and fall along the slide rod 203, finely adjusting the cavity gap between the upper mold 206 and the lower mold 207 to ensure it matches the thickness of the sheet metal. Subsequently, after the molten hollow sheet metal blank pushed by the extruder enters the cavity, the vacuum adsorption control system is turned on. The negative pressure enters the second strip tube 505 through the first connecting pipe 506, and is then distributed to the first strip tube 503 through the vacuum regulating valve 504. Finally, a uniform negative pressure field is formed on the cavity surface of the upper mold 206 through the vacuum groove 501 and the vacuum hole 502, firmly adsorbing the blank onto the cavity wall, forcing the blank to conform to the preset cross-sectional shape, and initially locking the hollow structure. At the same time, the vacuum adsorption control system is turned on. In the air flotation support control system, dry compressed air enters the third strip pipe 604 through the second connecting pipe 606. After the pressure is regulated by the pressure regulating valve 605, it is delivered to the air collection chamber 603 and then sprayed into the air vent 601 through the air jet micro-hole 602, forming a uniform air film on the surface of the cavity of the lower mold 207. Then, the cooling water from the external water supply system enters the water supply horizontal pipe 304 through the first valve 306, flows into the water inlet channel 301, and then enters the water outlet channel 302 through the connecting channel 303. After flowing through the water outlet horizontal pipe 305, it flows back through the second valve 307. At the same time, the cooling water enters the water inlet vertical pipe 402 through the third valve 404, and after passing through the cooling channel 401, it flows back through the water outlet vertical pipe 403 and the fourth valve 405. The plastic hollow board, after being shaped and cooled, moves out of the space between the upper mold 206 and the lower mold 207 at a uniform speed under the action of the traction machine. At this time, the surface of the blank has been solidified into a rigid shell.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A plastic hollow board shaping and cooling device, comprising a processing table (1), wherein a vacuum adsorption control system and an air flotation support control system are respectively provided at both ends inside the processing table (1), characterized in that: The processing table (1) has two sets of cooling mold mechanisms (2) at both ends of the top for cooling the plastic hollow board. The two sets of molds of the cooling mold mechanism (2) are equipped with a main cooling mechanism (3) and an auxiliary cooling mechanism (4) for cooling. The inner top of the cooling mold mechanism (2) is equipped with an adsorption mechanism (5) that provides adsorption force. The inner bottom of the cooling mold mechanism (2) is equipped with an air flotation mechanism (6) that provides upward air buoyancy. A control panel (10) is installed in the middle of one side of the processing table (1). The cooling mold mechanism (2) includes a base plate (201), which is provided in two sets. Both sets of base plates (201) are located on the top of the processing table (1). Slide rods (203) are symmetrically installed at the four corners of the top of the base plate (201). A top plate (202) is installed at the top of the four sets of slide rods (203). A U-shaped frame (205) is symmetrically arranged between the base plate (201) and the top plate (202). An upper mold (206) and a lower mold (207) are symmetrically installed inside the two sets of U-shaped frames (205). Lifting frames (204) sleeved on the slide rods (203) are symmetrically installed on both sides of the U-shaped frame (205). Several sets of electric telescopic rods (208) fixedly connected to an adjacent set of U-shaped frames (205) are symmetrically installed on the top of the base plate (201) and the bottom of the top plate (202). The two sets of main cooling mechanisms (3) are symmetrically arranged inside the upper mold (206) and the lower mold (207), respectively; the two sets of auxiliary cooling mechanisms (4) are symmetrically arranged inside the upper mold (206) and the lower mold (207), respectively. The main cooling mechanism (3) includes a water supply horizontal pipe (304). Water supply horizontal pipes (304) are symmetrically installed at the bottom of both sides of the upper mold (206) and the lower mold (207). Water outlet horizontal pipes (305) are symmetrically installed at the middle position of both sides of the upper mold (206) and the lower mold (207). The bottom of the upper mold (206) and the lower mold (207) are both longitudinally and evenly provided with water inlet channels (301), and the two sets of ports of the water inlet channels (301) on both sides of the upper mold (206) and the lower mold (207) are respectively connected to the interior of the two sets of water supply horizontal pipes (304) on the same side. Both the upper mold (206) and the lower mold (207) have longitudinally and evenly spaced water outlet channels (302) corresponding to the positions of the water inlet channel (301) at the middle position inside. The two sets of ports of the water outlet channel (302) located on both sides of the upper mold (206) and the lower mold (207) are respectively connected to the interior of the two sets of water outlet horizontal pipes (305) on the same side. The water inlet channel (301) and the water outlet channel (302) are connected by a connecting channel (303) at the middle position. One end of the water supply horizontal pipe (304) is connected to the output end of the external water supply system through a first valve (306). One end of the water outlet horizontal pipe (305) is connected to the return end of the external water supply system through a second valve (307). The water inlet channel (301) and the water outlet channel (302) have the same diameter. The diameter of the connecting channel (303) is larger than the diameter of the water inlet channel (301). The auxiliary cooling mechanism (4) includes an inlet longitudinal pipe (402) and an outlet longitudinal pipe (403). Two sets of inlet longitudinal pipes (402) are installed at one end of the upper mold (206) and the lower mold (207), and two sets of outlet longitudinal pipes (403) are installed at the other end of the upper mold (206) and the lower mold (207). The two sets of outlet longitudinal pipes (403) are symmetrically distributed with the two sets of inlet longitudinal pipes (402). The upper mold (206) and the lower mold (207) are each provided with two rows of cooling channels (401) evenly arranged in the middle position. The two sets of ports of the cooling channels (401) located at both ends of the upper mold (206) and the lower mold (207) are respectively connected to the interior of the water inlet pipe (402) and the water outlet pipe (403) on the same side. A row of cooling channels (401) at the bottom is located between the water inlet channel (301) and the water outlet channel (302), and a row of cooling channels (401) at the top is located above the water outlet channel (302). One end of the water inlet longitudinal pipe (402) is equipped with a third valve (404) that connects to the output end of the external water supply system, and one end of the water outlet longitudinal pipe (403) is equipped with a fourth valve (405) that connects to the return end of the external water supply system. The diameter of the cooling channel (401) is larger than the diameter of the water inlet channel (301). The air-floating mechanism (6) includes a second connecting pipe (606) located on one side of the lower mold (207). The bottom end of the second connecting pipe (606) is connected to the input end of the air-floating support control system inside the processing table (1). A row of air jet grooves (601) is evenly opened horizontally on the top of the lower mold (207). The air jet grooves (601) are spaced apart from the cooling channel (401). A row of air jet micro-holes (602) is evenly opened on the bottom of each group of air jet grooves (601). The bottom port of the air jet micro-holes (602) is located on the lower mold (207). At the bottom of the lower mold (207), each row of jet micro-holes (602) is spaced apart from a row of water inlet channels (301). A row of gas collection chambers (603) is evenly installed horizontally at the bottom of the lower mold (207). The port at the bottom of each row of jet micro-holes (602) is connected to the interior of an adjacent group of gas collection chambers (603). A third strip pipe (604) connected to the top of the second connecting pipe (606) is installed at one end of the bottom of the lower mold (207). A pressure regulating valve (605) connected to the interior of the third strip pipe (604) is installed at one end of the gas collection chamber (603). One end of the jet groove (601) is close to the edge of the lower mold (207), and the other end of the jet groove (601) is provided with an exhaust opening (607), and the exhaust opening (607) is located on the end face of one end of the lower mold (207). The depth of the jet groove (601) gradually becomes shallower from the end close to the exhaust opening (607) to the other end. The jet micro-hole (602) is inclined and perpendicular to the inner bottom surface of the jet groove (601).

2. The plastic hollow board shaping and cooling device according to claim 1, characterized in that, The adsorption mechanism (5) includes two sets of first connecting pipes (506) located on both sides of the upper mold (206). The bottom end of the first connecting pipe (506) is connected to the input end of the vacuum adsorption control system inside the processing table (1). A row of vacuum grooves (501) is evenly and longitudinally opened at the bottom of the upper mold (206). A row of vacuum holes (502) is evenly and vertically opened inside the vacuum grooves (501), and the top end of the vacuum holes (502) is located at the top of the upper mold (206). The vacuum grooves (501) and the connecting channels (303) are distributed at intervals. A row of first strip tubes (503) is evenly and longitudinally installed at the top of the upper mold (206). The top end of each row of vacuum holes (502) is located at the top of the upper mold (206). All ports are connected to the interior of the adjacent first strip tube (503). Each row of first strip tubes (503) is spaced apart from the water inlet channel (301) and the cooling channel (401). Two rows of vacuum regulating valves (504) are installed on both sides of the top of the U-shaped frame (205). The input end of each group of vacuum regulating valves (504) is connected to the interior of a group of first strip tubes (503). The sum of the number of the two rows of vacuum regulating valves (504) is the same as the number of the first strip tubes (503) in one row. The input end of each row of vacuum regulating valves (504) is connected to the interior of the second strip tube (505). The interior of the second strip tube (505) is connected to the top of the adjacent first connecting pipe (506).

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