Extrusion forming die for EPS (Expandable Polystyrene) foam box

Abstract

The invention relates to the field of foam box production, in particular to an EPS (Expandable Polystyrene) foam box extrusion forming die which comprises a workbench and a [-shaped frame arranged on the workbench, an upper die box capable of moving back and forth in the vertical direction is arranged on the [-shaped frame; a lower die mechanism is further arranged at the center of the workbench and comprises a rectangular frame arranged in a horizontal state, rectangular hollow columns are arranged at the four corners of the rectangular frame, a plurality of attaching plates are arranged between every two adjacent rectangular hollow columns at equal intervals, a snakelike flow channel is formed in each attaching plate, and the snakelike flow channels communicate with the rectangular hollow columns. The rectangular frame is further provided with an adjusting mechanism capable of enabling the multiple attaching plates between every two adjacent rectangular hollow columns to sequentially move back and forth. The workbench is further provided with a cooling mechanism for conveying cold air into the corresponding rectangular hollow column. By means of the attaching plate, foamed plastic particles can be evenly distributed, the attaching plate can be separated from the formed foam box, and adhesion of the foam box is avoided.

Description

Technical Field

[0001] The present application relates to the field of foam box production, and in particular to an EPS foam box extrusion molding die. Background Art

[0002] Expanded Polystyrene (EPS) is a light polymer. It is made of polystyrene resin particles with a foaming agent added, heated and softened to produce gas, forming a rigid closed-cell foam plastic. EPS foam box is a box-type packaging container made of foam plastic (porous plastic).

[0003] Chinese patent: CN117644606A discloses a pressing device for producing EPS foam boxes, including a basic frame, a cooling system, a model shell and a pressing assembly. A cooling channel is opened on the inner side of the shell wall of the model shell, a pressing assembly is installed above the model shell, and a cooling system is installed on the outer wall of the model shell. The pressing assembly includes a servo motor, a roller, a rack, a basic guide frame, a pressing frame, a driving shaft and a driving wheel. The cooling system includes a driven wheel, a linkage shaft, a transverse rod, a turbine fan blade, a water tank, a sleeve shaft and an extrusion bin.

[0004] In this application, the raw materials placed in the model shell are squeezed by a pressing frame to form a foam box; however, after cooling, the staff is required to take the foam box out of the model shell. At this time, the foam box may be adhered to the inner wall of the model shell, which makes it inconvenient for the staff to take it out, slowing down the production efficiency of the foam box. Summary of the invention

[0005] The main purpose of the present application is to provide an EPS foam box extrusion molding die, which can not only evenly distribute the foam plastic particles through the reciprocating movement of multiple bonding plates, thereby improving the molding effect; it can also separate the bonding plates from the molded foam box, thereby avoiding adhesion of the foam box.

[0006] To achieve the above object, the present application provides an extrusion molding die for an EPS foam box, which includes a workbench and a U-shaped frame arranged on the workbench; it also includes an upper die mechanism, a lower die mechanism, an adjustment mechanism and a cooling mechanism; the upper die mechanism is arranged on the U-shaped frame; the upper die mechanism includes an upper die box capable of reciprocating in the vertical direction; a blanking port is arranged at the center of the workbench, and two blocking plates are hinged in the blanking port; the lower die mechanism is arranged at the center of the workbench and is located between the U-shaped frame and the workbench; the lower die mechanism includes a rectangular frame arranged in a horizontal state; the outer walls on both sides of the rectangular frame are connected to the inner walls on both sides of the U-shaped frame through connecting strips, and rectangular hollow columns extending towards the workbench are arranged at the four corners of the rectangular frame; a plurality of fitting plates are evenly arranged at equal intervals between every two adjacent rectangular hollow columns, and each fitting plate can reciprocate along the direction perpendicular to its length; the adjustment mechanism is arranged on the rectangular frame and can make the plurality of fitting plates evenly arranged between two adjacent rectangular hollow columns reciprocate in sequence; a serpentine flow channel is arranged inside each fitting plate, and strip-shaped grooves communicating with the serpentine flow channel are arranged on the outer walls on both sides of each fitting plate along the length direction; communication holes communicating with the corresponding strip-shaped grooves are arranged on two adjacent outer walls of each rectangular hollow column; an air inlet pipe is arranged on one of the rectangular hollow columns, and an exhaust pipe is arranged on the rectangular hollow column far from the air inlet pipe; the cooling mechanism is arranged on the workbench and can convey cold air into the corresponding rectangular hollow column through the air inlet pipe.

[0007] Preferably, the adjustment mechanism includes a rotating shaft, a first sector convex block and a second sector convex block; there are four rotating shafts, and a rotating shaft is rotatably arranged between every two adjacent rectangular hollow columns. The four rotating shafts are in a rectangular shape. A plurality of first sector convex blocks are evenly arranged along the length direction of each rotating shaft, and a second sector convex block is arranged between every two first sector convex blocks. The first sector convex block and the second sector convex block have the same radius, and the arc length of the first sector convex block is greater than the arc length of the second sector convex block; a guide block is arranged on one side of each fitting plate far from the center of the blanking port, and an oval through groove for avoiding the rotating shaft is arranged on each guide block; the first sector convex block and the second sector convex block are sequentially arranged in the corresponding oval through groove; a positioning frame is also arranged at the center of the workbench, and a plurality of rectangular guide grooves are evenly arranged on each side of the positioning frame. A guide strip is arranged on one side of each fitting plate close to the guide block, and the guide strip is slidably arranged in the corresponding rectangular guide groove.

[0008] Preferably, a limiting disc is arranged at one end of each guide strip far from the corresponding fitting plate, and a compression spring is also sleeved on each guide strip. The compression spring is located between the corresponding limiting disc and the outer wall of the positioning frame.

[0009] Preferably, a plurality of exhaust grooves are evenly arranged along the length direction on the inner wall on one side of each strip-shaped groove close to the center of the blanking port.

[0010] Preferably, each plugging plate is further provided with a receiving cavity, each rectangular hollow column is provided with a diversion hole at the bottom, and two input holes corresponding to the diversion holes are mirror-symmetrically arranged on each plugging plate.

[0011] Preferably, the upper die mechanism further includes a first hydraulic rod; the first hydraulic rod is vertically arranged at the center of the top of the C-shaped frame, and the execution part of the first hydraulic rod passes through the C-shaped frame and is connected to the center of the inner wall of the bottom of the upper die box.

[0012] Preferably, the cooling mechanism includes an air conditioner and a connecting hose; the air conditioner is arranged on the workbench, and the output end of the air conditioner is communicated with the air inlet pipe on the corresponding rectangular hollow column through the connecting hose.

[0013] Preferably, a conveyor belt is further arranged at the bottom of the workbench.

[0014] Preferably, two second hydraulic rods are mirror-hinged at the bottom of the workbench, and one end of each second hydraulic rod away from the workbench is hinged to the corresponding plugging plate.

[0015] The beneficial effects of the present application compared with the prior art are as follows: 1. Through the cooperation of multiple fitting plates and plugging plates in the present application, when the upper die box extrudes the foam plastic particles, the multiple plugging plates between two adjacent rectangular hollow columns can move in sequence, which can not only make the foam plastic particles evenly distributed and improve the forming effect of the foam box, but also make the multiple fitting plates separate from the formed foam box in sequence to avoid the adhesion of the foam box.

[0016] 2. Through the cooperation of the air conditioner and the fitting plate in the present application, the cold air of the air conditioner enters the serpentine flow channel of the fitting plate through the rectangular hollow column, so as to cool the side wall of the foam box; through the cooperation of the diversion hole and the input hole, the cold air can enter the receiving cavities of the two plugging plates along three of the rectangular hollow columns, so as to accelerate the flow rate of the gas in the receiving cavities and cool the bottom of the foam box faster; the gas after heat exchange is discharged through the exhaust pipe, so as to realize the circulation of the gas in the receiving cavity and ensure the cooling effect.

[0017] 3. Through the multiple exhaust grooves arranged in the present application, the gas can blow the foam plastic particles in the lower die cavity a second time through the exhaust grooves, so that the foam plastic particles can be more evenly distributed between the upper die box and the lower die cavity; and after cooling for a period of time, as the fitting plate moves, the gas in the serpentine flow channel can blow the outer wall of the formed foam box through the exhaust grooves, which can not only further avoid the adhesion of the foam box, but also enable the gas to directly contact the foam box, thereby further improving the cooling effect. Description of the Drawings

[0018] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings: Figure 1 The present invention is a three-dimensional Figure 1 ; Figure 2 yes Figure 1 A partial enlarged view of the middle part; Figure 3 The present invention is a three-dimensional Figure 2 ; Figure 4 yes Figure 3 A partial enlarged view of point B in the middle; Figure 5 is a bottom view of the present invention; Figure 6 It is the local stereoscopic Figure 1 ; Figure 7 It is a partial front view of the present invention; Figure 8 yes Figure 7 Plane section view along CC direction; Fig. 9 yes Figure 8 A partial enlarged view of point D in the middle; Fig.10 It is the local stereoscopic Figure 2 ; Fig.11 It is the local stereoscopic Figure 3 ; Fig.12 It is the local stereoscopic Figure 4 ; Fig.13 It is the local stereoscopic Figure 5 .

[0019] The numbers in the above figure are: 1-working table; 11-shaped frame; 12-feeding port; 13-blocking plate; 131-accommodating chamber; 132-input hole; 14-positioning frame; 141-rectangular guide groove; 15-conveyor belt; 16-second hydraulic rod; 2-upper die mechanism; 21-upper die box; 22-first hydraulic rod; 3-lower mold mechanism; 31-rectangular frame; 311-connecting strip; 32-rectangular hollow column; 321-connecting hole; 322-diverter hole; 323-driving motor; 33-fitting plate; 331-serpentine flow channel; 332-strip groove; 3321-exhaust groove; 333-guide block; 3331-elliptical through groove; 334-guide strip; 3341-limiting plate; 3342-compression spring; 34-intake pipe; 35-exhaust pipe; 4-adjusting mechanism; 41-rotating shaft; 411-bevel gear; 42-first sector-shaped convex block; 43-second sector-shaped convex block; 5-cooling mechanism; 51-air conditioner; 52-connecting hose. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0021] See also Figures 1 to 13As shown in the figure, an extrusion molding die for an EPS foam box includes a workbench 1 and a U-shaped frame 11 arranged on the workbench 1; it also includes an upper die mechanism 2, a lower die mechanism 3, an adjustment mechanism 4, and a cooling mechanism 5; the upper die mechanism 2 is arranged on the U-shaped frame 11; the upper die mechanism 2 includes an upper die box 21 that can move back and forth in the vertical direction; a blanking port 12 is arranged at the center of the workbench 1, and two blocking plates 13 are hinged in the blanking port 12; the lower die mechanism 3 is arranged at the center of the workbench 1 and is located between the U-shaped frame 11 and the workbench 1; the lower die mechanism 3 includes a rectangular frame 31 arranged in a horizontal state; both outer walls on both sides of the rectangular frame 31 are connected to the inner walls on both sides of the U-shaped frame 11 through connecting strips 311, and rectangular hollow columns 32 extending towards the workbench 1 are arranged at the four corners of the rectangular frame 31; a plurality of fitting plates 33 are evenly arranged at equal intervals between every two adjacent rectangular hollow columns 32, and each fitting plate 33 can move back and forth along a direction perpendicular to its length; the adjustment mechanism 4 is arranged on the rectangular frame 31 and can make the plurality of fitting plates 33 arranged at equal intervals between two adjacent rectangular hollow columns 32 move back and forth in sequence; a serpentine flow channel 331 is arranged inside each fitting plate 33, and strip-shaped grooves 332 communicating with the serpentine flow channel 331 are arranged on both outer walls along the length direction of each fitting plate 33; communication holes 321 communicating with the corresponding strip-shaped grooves 332 are arranged on two adjacent outer walls of each rectangular hollow column 32; an air inlet pipe 34 is arranged on one of the rectangular hollow columns 32, and an exhaust pipe 35 is arranged on the rectangular hollow column 32 far from the air inlet pipe 34; the cooling mechanism 5 is arranged on the workbench 1 and can convey cold air into the corresponding rectangular hollow column 32 through the air inlet pipe 34.

[0022] The two sealing plates 13 are close to each other, thereby sealing the feed opening 12, and multiple bonding plates 33 and the two sealing plates 13 form a lower mold cavity. The staff places the foam plastic particles in the lower film cavity, and then, by moving the upper mold box 21, the upper mold box 21 is moved into the lower mold cavity. At this time, the foam plastic particles on the two sealing plates 13 are squeezed and pushed, thereby moving to a position close to the bonding plates 33. Subsequently, through the adjustment mechanism 4, the multiple bonding plates 33 equidistantly arranged between the two adjacent rectangular hollow columns 32 can be moved toward the inner direction of the lower mold cavity in turn, and the bonding plates 33 can contact the extruded foam plastic particles in turn, thereby shaking the foam plastic particles so that they can be evenly distributed in the lower mold cavity, thereby improving the molding effect of the foam box; a heating wire is arranged in the upper mold box 21, which can heat and melt the foam plastic particles to complete the shaping of the foam box. After the extrusion is completed, cold air is transported to the corresponding rectangular hollow column 32 through the air cooler 51, and the cold air passes through the air cooler 51 arranged in the rectangular hollow column 32. The connecting hole 321 on the outer wall of the rectangular hollow column 32 enters into the two adjacent serpentine flow channels 331, and the serpentine flow channels 331 between the two adjacent bonding plates 33 are interconnected through the strip groove 332, thereby further slowing down the circulation speed of the cold air in the serpentine flow channel 331, and the cold air moves toward the rectangular hollow column 32 close to the exhaust pipe 35, thereby cooling the foam box and increasing its molding speed. The gas after heat exchange is discharged through the exhaust pipe 35 arranged on the diagonal rectangular hollow column 32, thereby enabling continuous cooling to ensure the cooling effect; after a period of time, with the cooperation of the adjustment mechanism 4, the multiple bonding plates 33 between the two rectangular hollow columns 32 are moved back and forth. During the reciprocating movement, the moving bonding plates 33 can be separated from the molded foam box to avoid the foam box and the bonding plates 33 from sticking to each other. Subsequently, the two sealing plates 13 move away from each other, and the cooled foam box falls from the discharge port 12, which not only facilitates the handling by the staff but also improves the production efficiency.

[0023] See also Figures 1 to 4As shown, the adjustment mechanism 4 includes a rotating shaft 41, a first fan-shaped protrusion 42 and a second fan-shaped protrusion 43; there are four rotating shafts 41, and a rotating shaft 41 is rotatably arranged between every two adjacent rectangular hollow columns 32. The four rotating shafts 41 are rectangular in shape, and each rotating shaft 41 is equidistantly arranged with a plurality of first fan-shaped protrusions 42 along the length direction, and a second fan-shaped protrusion 43 is arranged between every two first fan-shaped protrusions 42. The radius of the first fan-shaped protrusion 42 and the second fan-shaped protrusion 43 is the same, and the arc length of the first fan-shaped protrusion 42 is greater than the arc length of the second fan-shaped protrusion 43; each attached A guide block 333 is provided on one side of the bonding plate 33 away from the center of the discharge port 12, and each guide block 333 is provided with an elliptical groove 3331 for avoiding the rotating shaft 41, and the first fan-shaped protrusion 42 and the second fan-shaped protrusion 43 are arranged in the corresponding elliptical groove 3331 in sequence; a positioning frame 14 is also provided at the center of the workbench 1, and each side of the positioning frame 14 is equidistantly provided with a plurality of rectangular guide grooves 141, and a guide bar 334 is provided on the side of each bonding plate 33 close to the guide block 333, and the guide bar 334 is slidably set in the corresponding rectangular guide groove 141.

[0024] Each rotating shaft 41 is provided with bevel gears 411 at both ends, and two adjacent bevel gears 411 are meshed with each other. A driving motor 323 is provided on one of the rectangular hollow columns 32, and the driving motor 323 is used to drive any rotating shaft 41 on the rectangular hollow column 32 to rotate. The staff drives the corresponding rotating shaft 41 to rotate through the driving motor 323, and the four rotating shafts 41 are meshed with each other through the bevel gears 411, so as to rotate synchronously. Since the first sector-shaped protrusion 42 and the second sector-shaped protrusion 43 are equidistantly arranged on each rotating shaft 41, the radius of the first sector-shaped protrusion 42 and the second sector-shaped protrusion 43 are the same and the radius of the first sector-shaped protrusion 42 is the same. The arc length is greater than that of the second fan-shaped protrusion 43; as the rotating shaft 41 rotates, the second fan-shaped protrusion 43 rotates in the corresponding elliptical groove 3331, and the stability of the movement of the bonding plate 33 is ensured by the cooperation of the guide strip 334 and the rectangular guide groove 141; thereby, the bonding plate 33 in contact with the second fan-shaped protrusion 43 can move before the bonding plate 33 in contact with the first fan-shaped protrusion 42, thereby generating an asynchronous alternating motion, which can not only shake the foam plastic particles to make them evenly distributed in the lower mold cavity, but also can gradually separate the bonding plate 33 from the molded foam box after cooling for a period of time, thereby avoiding adhesion of the foam box.

[0025] See also Figure 6 and Fig.10 As shown, a limit plate 3341 is provided at one end of each guide bar 334 away from the corresponding bonding plate 33 , and a compression spring 3342 is also sleeved on each guide bar 334 , and the compression spring 3342 is located between the corresponding limit plate 3341 and the outer wall of the positioning frame 14 .

[0026] By providing a pressing spring 3342, each fitting plate 33 can generate an elastic force in the direction away from the center of the blanking port 12. And since the radii of the first sector bump 42 and the second sector bump 43 are the same, when the central points of the arc surfaces of the first sector bump 42 and the second sector bump 43 contact the inner wall of the elliptical groove of the corresponding fitting plate 33, two adjacent rectangular hollow columns 32 and the corresponding multiple fitting plates 33 can be parallel to each other, avoiding protrusions on the outer wall of the foam box and ensuring the quality of the foam box after extrusion.

[0027] See Fig.10 As shown, a plurality of exhaust grooves 3321 are equidistantly arranged along the length direction on the inner wall of one side of each strip groove 332 close to the center of the blanking port 12.

[0028] By providing a plurality of exhaust grooves 3321, when the fitting plate 33 contacts the foam plastic particles, gas is conveyed to the serpentine flow channel 331 in the fitting plate 33 through the cold cutting mechanism. Due to the gradual movement of the fitting plate 33, the gas can blow the foam plastic particles in the lower mold cavity a second time through the exhaust grooves 3321, so that the foam plastic particles can be more evenly distributed between the upper mold box 21 and the lower mold cavity; and after cooling for a period of time, as the fitting plate 33 moves, the gas in the serpentine flow channel 331 can blow the outer wall of the formed foam box through the exhaust grooves 3321, which can not only further avoid the adhesion of the foam box, but also enable the gas to directly contact the foam box, thereby improving the cooling effect.

[0029] See Fig.11 and Fig.12 As shown, an accommodation cavity 131 is also provided in each plugging plate 13. A diversion hole 322 is provided at the bottom of each rectangular hollow column 32, and two input holes 132 corresponding to the diversion hole 322 are mirror-symmetrically arranged on each plugging plate 13.

[0030] The two plugging plates 13 are parallel to each other, and the two accommodation cavities 131 are communicated with each other. Through the cooperation of the diversion hole 322 and the input hole 132, the cold air can enter the accommodation cavities 131 of the two plugging plates 13 along three of the rectangular hollow columns 32, so as to accelerate the flow rate of the gas in the accommodation cavities 131 and cool the bottom of the foam box faster; the gas after heat exchange is discharged through the exhaust pipe 35, thereby realizing the circulation of the gas in the accommodation cavities 131 and ensuring the cooling effect.

[0031] See Figure 1 and Figure 3 As shown, the upper mold mechanism 2 further includes a first hydraulic rod 22; the first hydraulic rod 22 is vertically arranged at the center of the top of the C-shaped frame 11, and the execution part of the first hydraulic rod 22 passes through the C-shaped frame 11 and is connected to the center of the inner wall of the bottom of the upper mold box 21.

[0032] The upper mold box 21 is driven by the first hydraulic rod 22 to move toward the workbench 1, and the foam plastic particles placed on the sealing plate 13 are squeezed and melted, so that the foam plastic particles can be formed into the specifications of the required foam box; and after cooling is completed, the first hydraulic rod 22 can continue to push downward for a short distance, so that the formed foam box can be dropped from the discharge port 12 more easily.

[0033] See also Figures 1 to 5 As shown, the cooling mechanism 5 includes an air cooler 51 and a connecting hose 52 ; the air cooler 51 is disposed on the workbench 1 , and the output end of the air cooler 51 is connected to the air inlet pipe 34 on the corresponding rectangular hollow column 32 through the connecting hose 52 .

[0034] By providing the air cooler 51 , the cold air generated by the air cooler 51 is transported to the inside of the corresponding rectangular hollow column 32 through the connecting hose 52 , thereby achieving cooling of the foam box.

[0035] See also Figure 1 As shown, a conveyor belt 15 is also provided at the bottom of the workbench 1 .

[0036] By providing the conveyor belt 15 , the fallen foam boxes can be conveyed, thereby preventing the foam boxes from piling up under the workbench 1 , thereby improving the production efficiency of the foam boxes.

[0037] See also Figure 5 As shown, two second hydraulic rods 16 are hingedly connected to the bottom of the workbench 1 in a mirror-image manner, and one end of each second hydraulic rod 16 away from the workbench 1 is hingedly connected to the corresponding blocking plate 13 .

[0038] When the foam box is extruded, the two second hydraulic rods 16 can make the two sealing plates 13 parallel to each other, thereby sealing the discharge port 12 and ensuring that the foam box can be extruded; when cooling is completed, the two second hydraulic rods 16 separate the two sealing plates 13 from each other, which not only prevents the bottom of the foam box from sticking to the sealing plates 13, but also allows the foam box to fall through the discharge port 12, thereby improving the production efficiency of the foam box.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An EPS foam box extrusion molding die, comprising a workbench and a shaped frame arranged on the workbench; characterized in that: It also includes an upper die mechanism, a lower die mechanism, an adjustment mechanism and a cooling mechanism; The upper die mechanism is arranged on the C-shaped frame; the upper die mechanism includes an upper die box capable of reciprocating in the vertical direction; A blanking port is arranged at the center of the workbench, and two plugging plates are hinged in the blanking port; the lower die mechanism is arranged at the center of the workbench and is located between the C-shaped frame and the workbench; the lower die mechanism includes a rectangular frame arranged horizontally; the outer walls on both sides of the rectangular frame are connected to the inner walls on both sides of the C-shaped frame through connecting strips, and rectangular hollow columns extending towards the workbench are arranged at the four corners of the rectangular frame; a plurality of fitting plates are evenly arranged at equal intervals between every two adjacent rectangular hollow columns, and each fitting plate can reciprocate along the direction perpendicular to its length; The adjustment mechanism is arranged on the rectangular frame and can make a plurality of fitting plates evenly arranged between two adjacent rectangular hollow columns reciprocate in sequence; A serpentine flow channel is arranged inside each fitting plate, and strip-shaped grooves communicating with the serpentine flow channel are arranged on the outer walls on both sides of each fitting plate along the length direction; communication holes communicating with the corresponding strip-shaped grooves are arranged on two adjacent outer walls of each rectangular hollow column; an air inlet pipe is arranged on one of the rectangular hollow columns, and an exhaust pipe is arranged on the rectangular hollow column far from the air inlet pipe; The cooling mechanism is arranged on the workbench and can convey cold air into the corresponding rectangular hollow column through the air inlet pipe.

2. The EPS foam box extrusion molding die according to claim 1, characterized in that: The adjustment mechanism includes a rotating shaft, a first sector convex block and a second sector convex block; There are four rotating shafts, and a rotating shaft is rotatably arranged between every two adjacent rectangular hollow columns. The four rotating shafts are in a rectangular shape. A plurality of first sector convex blocks are evenly arranged on each rotating shaft along the length direction, and a second sector convex block is arranged between every two first sector convex blocks. The first sector convex block and the second sector convex block have the same radius, and the arc length of the first sector convex block is greater than the arc length of the second sector convex block; A guide block is arranged on one side of each fitting plate away from the center of the blanking port, and an oval through groove for avoiding the rotating shaft is arranged on each guide block; the first sector convex block and the second sector convex block are sequentially arranged in the corresponding oval through groove; a positioning frame is also arranged at the center of the workbench, and a plurality of rectangular guide grooves are evenly arranged on each side of the positioning frame. A guide strip is arranged on one side of each fitting plate close to the guide block, and the guide strip is slidably arranged in the corresponding rectangular guide groove.

3. The EPS foam box extrusion molding die according to claim 2, characterized in that: A limiting disc is arranged at one end of each guide strip away from the corresponding fitting plate, and a compression spring is also sleeved on each guide strip. The compression spring is located between the corresponding limiting disc and the outer wall of the positioning frame.

4. The EPS foam box extrusion molding die according to claim 1, characterized in that: A plurality of exhaust grooves are evenly arranged along the length direction on the inner wall on one side of each strip-shaped groove close to the center of the blanking port.

5. The EPS foam box extrusion molding die according to claim 1, characterized in that: An accommodation cavity is also arranged in each plugging plate, a diversion hole is arranged at the bottom of each rectangular hollow column, and two input holes corresponding to the diversion hole are arranged on each plugging plate in a mirror image manner.

6. The EPS foam box extrusion molding die according to claim 1, characterized in that: The upper die mechanism also includes a first hydraulic rod; The first hydraulic rod is arranged vertically at the center of the top of the C-shaped frame, and the execution part of the first hydraulic rod passes through the C-shaped frame and is connected to the center of the inner wall of the bottom of the upper die box.

7. The EPS foam box extrusion molding die according to claim 1, characterized in that: The cooling mechanism includes an air conditioner and a connecting hose; The air conditioner is arranged on the workbench, and the output end of the air conditioner is communicated with the air inlet pipe on the corresponding rectangular hollow column through the connecting hose.

8. The EPS foam box extrusion molding die according to claim 1, characterized in that: A conveyor belt is also arranged at the bottom of the workbench.

9. The EPS foam box extrusion molding die according to claim 1, characterized in that: Two second hydraulic rods are hingedly connected to the bottom of the workbench in a mirror-image manner, and one end of each second hydraulic rod away from the workbench is hingedly connected to a corresponding blocking plate.

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