Forming device for EPP packaging box production and forming method thereof

Abstract

The invention discloses a forming device for EPP packaging box production and a forming method thereof, and relates to the technical field of EPP packaging box production. According to the forming device for EPP packaging box production and the forming method of the forming device, through mutual cooperation of the foaming cylinder mechanism, the inner gear ring, the feeding mechanism and the driving rod mechanism, the driving rod mechanism is started, the foaming cylinder mechanism and the feeding mechanism can be driven to work together at the same time, and in the working process of the feeding mechanism, the foaming cylinder mechanism and the feeding mechanism are driven to work; a set amount of EPP raw material particles are intermittently put into the foaming barrel mechanism, a foaming agent in the liquid storage barrel is intermittently sucked into the foaming barrel mechanism, and in the working process of the foaming barrel mechanism, the EPP raw material particles and the foaming agent in the foaming barrel mechanism can be automatically stirred, so that the EPP raw material particles and the foaming agent can be fully mixed, and the foaming efficiency is improved; through cooperation of the bearing base plate, the multiple foaming branch cylinders and the mixing rod assembly, EPP raw material particles and a foaming agent can be put into all the foaming branch cylinders in batches.

Description

Technical Field

[0001] The invention relates to the technical field of EPP packaging box production, in particular to a forming device and a forming method for EPP packaging box production. Background Art

[0002] The material of EPP packaging boxes is expanded polypropylene, which is a new type of foam plastic. In order to improve the performance and production efficiency of EPP packaging boxes and respond to the call for environmental protection, plastic waste is recycled and converted into EPP raw material particles. Then, in the production and molding of EPP packaging boxes, an appropriate amount of foaming agent is added to the recycled EPP raw material particles to fuse the EPP raw material particles with the foaming agent. In the subsequent shaping process, it is ensured that the EPP packaging boxes not only maintain their original excellent properties, but also have a lighter and more stable structure, further strengthening EPP's leading position in packaging box manufacturing.

[0003] A fully automatic EPP forming machine disclosed in a patent application with reference publication number CN219563920U drives a stirring tank to rotate through the cooperation of a driving shaft and a fixed frame, and a bevel gear plate is arranged on the rear side of the stirring tank, and the bevel gear plate is fixedly installed on a fixed platform. When the fixed frame rotates, the bevel gear meshes and rotates with the bevel gear plate, thereby driving the stirring tank to rotate by itself through a driven wheel 1, a belt and a driven wheel 2. When the stirring tank rotates, the stirring rod can improve the internal stirring effect, so that the EPP material is fully integrated with the foaming agent, thereby improving the production of the EPP foam board.

[0004] Comprehensive analysis of the above reference patents shows the following defects:

[0005] In the existing molding device and molding method for EPP packaging box production, in the process of mixing EPP raw material particles and foaming agent to achieve foaming reaction, the raw materials and foaming agent are usually put into a single foaming cylinder in large quantities at one time, which makes it difficult to put the raw materials and foaming agent into multiple foaming branch cylinders in batches and intermittently put a set amount of raw materials and foaming agent into each foaming branch cylinder, resulting in poor mixing effect, incomplete foaming, and affecting the molding quality of the product. Therefore, it is necessary to provide a molding device and molding method for EPP packaging box production to solve the above technical problems. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a molding device and a molding method for the production of EPP packaging boxes, which solves the problem that in the process of mixing EPP raw material particles and a foaming agent to achieve a foaming reaction, the raw materials and the foaming agent are usually put into a single foaming cylinder in large quantities at one time, making it difficult to put the raw materials and the foaming agent into multiple foaming branch cylinders in batches, and to intermittently put a set amount of raw materials and foaming agent into each foaming branch cylinder, resulting in poor mixing effect, incomplete foaming and affecting the molding quality of the product.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A forming device for producing EPP packaging boxes, comprising:

[0008] A lower working barrel, an upper working barrel is arranged on the top of the lower working barrel through a connecting plate, the lower working barrel and the upper working barrel are placed on the ground through a plurality of supporting legs, a protective cover is fixedly arranged on the bottom of the lower working barrel, an inner gear ring is fixedly arranged in the inner cavity of the protective cover through a plurality of supporting plates, a liquid storage barrel is arranged behind the lower working barrel and the upper working barrel for containing a foaming agent, and the liquid storage barrel is placed on the ground;

[0009] A foaming barrel mechanism, used to fuse EPP raw material particles converted from recycled plastic waste with a foaming agent to perform a foaming reaction, wherein the foaming barrel mechanism is arranged between the lower working barrel and the interior of the upper working barrel;

[0010] A feeding mechanism, used for intermittently feeding EPP raw material particles and foaming agent converted from recycled plastic waste into the foaming barrel mechanism, wherein the feeding mechanism is arranged on the top right side of the upper working barrel;

[0011] The driving rod mechanism is used to drive the foaming tube mechanism to rotate and drive the feeding mechanism to work. The driving rod mechanism is arranged between the lower working barrel, the upper working barrel and the inside of the feeding mechanism.

[0012] Preferably, the foaming cylinder mechanism includes a supporting chassis, which rotates and penetrates the bottom of the lower working barrel, and a plurality of foaming branch cylinders are evenly and fixedly arranged in a circle on the top of the supporting chassis, and the top of each foaming branch cylinder contacts the top wall of the inner cavity of the upper working barrel, and a mixing rod assembly is rotatably arranged in the inner cavity of each foaming branch cylinder, and a discharge pipe that penetrates to the bottom of the supporting chassis is fixedly arranged at the bottom of each foaming branch cylinder, and a solenoid valve located below the supporting chassis is fixedly arranged on the upper part of the discharge pipe.

[0013] Preferably, each of the mixing rod assemblies comprises a first shaft rod, the bottom of which rotates and passes through between the foaming support tube and the bottom of the supporting chassis, the outer wall of the first shaft rod is evenly and fixedly provided with a plurality of first mixing support rods located in the foaming support tube, and the plurality of first mixing support rods are spirally distributed outside the first shaft rod, a second shaft rod is fixedly provided on the top of the first shaft rod, a plurality of second mixing support rods are evenly and fixedly provided on the outer wall of the second shaft rod, and the plurality of second mixing support rods are spirally distributed outside the second shaft rod, the spiral shape formed by the plurality of second mixing support rods is opposite in rotation to the spiral shape formed by the plurality of first mixing support rods, and the bottom of the first shaft rod is fixedly sleeved with a gear located below the supporting chassis, and the gear is meshed with an inner gear ring.

[0014] Preferably, the feeding mechanism includes a accommodating box, which is fixedly arranged on the top right side of the upper working barrel, a partition is fixedly arranged between the left side walls of the inner cavity of the accommodating box, a hollow disk is fixedly passed through the top of the accommodating box, the top of the hollow disk is fixedly connected to a storage hopper, a sealing cover is arranged on the top of the storage hopper, the bottom of the hollow disk is fixedly connected to a discharge pipe, the bottom of the discharge pipe is fixedly passed through the top of the upper working barrel, and a liquid extraction cylinder assembly is arranged in the accommodating box and between the two sides of the discharge pipe.

[0015] Preferably, a feed disc body is rotatably arranged between the inner walls of the hollow disc, a material containing groove is opened on the top of the feed disc body, a horizontal axis is fixedly passed through the middle of the inner part of the feed disc body, the left and right ends of the horizontal axis pass through the outer wall of the hollow disc, the right end of the horizontal axis is rotatably connected to the right wall of the inner cavity of the containing box, cams are fixedly sleeved on the outside of the horizontal axis and on both sides of the hollow disc, a transmission is fixedly arranged on the right side of the partition, the output shaft of the transmission is fixedly connected to the left end of the horizontal axis, and the input shaft of the transmission rotatably passes through the left wall of the partition and is fixedly provided with a first bevel gear.

[0016] Preferably, the liquid suction cylinder assembly includes two cylinders, the rear ends of the two cylinders are fixedly connected to the rear wall of the inner cavity of the containing box through a rod body, the two cylinders are respectively located on the left and right sides of the discharge pipe, and a piston block is slidably arranged between the inner walls of each cylinder, and a piston rod is fixedly arranged on the top of the piston block.

[0017] Preferably, the top of the piston rod slides through the top of the cylinder and is fixedly provided with a top plate, the top plate is located directly below the corresponding cam, and the outer sleeve of the piston rod is provided with a spring, the spring is located between the top of the cylinder and the bottom of the top plate.

[0018] Preferably, the bottom of the cylinder is fixedly connected to a liquid outlet pipe, the bottom of the liquid outlet pipe is fixedly passed through the top of the upper working barrel, the upper part of the liquid outlet pipe is fixedly provided with a liquid outlet valve located above the upper working barrel, the rear end bottom of the cylinder is fixedly connected to a liquid inlet pipe, the front part of the liquid inlet pipe is fixedly provided with a liquid inlet valve, the rear end of the liquid inlet pipe is fixedly passed through the rear wall of the containing box, an L-shaped elbow is fixedly connected between the two liquid inlet pipes, the bottom of the L-shaped elbow is fixedly passed through the top of the liquid storage barrel and extends to the lower part of its inner cavity.

[0019] Preferably, the driving rod mechanism includes a servo motor, which is fixedly connected to the top left side of the accommodating box, the output end of the servo motor passes through the top of the accommodating box and is fixedly provided with a connecting shaft, the bottom of the connecting shaft rotates and passes through the top of the upper working barrel and is fixedly connected to the middle of the top of the supporting chassis, the lower fixed sleeve of the connecting shaft is provided with a connecting frame, the connecting frame is fixedly connected to the side walls of a plurality of foaming support tubes, the upper fixed sleeve of the connecting shaft is provided with a second bevel gear, and the right side of the second bevel gear is meshed with the bottom of the first bevel gear.

[0020] The present invention also provides a molding method for producing an EPP packaging box, using a molding device for producing an EPP packaging box, and the specific method includes the following steps:

[0021] Step 1: Put the EPP raw material particles converted from recycled plastic waste into the feeding mechanism in advance, and inject the foaming agent into the liquid storage barrel, then start the driving rod mechanism to drive the foaming barrel mechanism to rotate, and drive the feeding mechanism to work at the same time. During the operation of the feeding mechanism, a set amount of EPP raw material particles is intermittently added to the foaming barrel mechanism, and the foaming agent in the liquid storage barrel is intermittently sucked into the foaming barrel mechanism. During the rotation of the foaming barrel mechanism, the EPP raw material particles and the foaming agent inside are automatically stirred to fully mix the EPP raw material particles and the foaming agent to perform a foaming reaction, and then the foamed mixture is discharged through the bottom of the foaming barrel mechanism;

[0022] Step 2: The mixture is then fed into a melt extruder, where the mixture is heated to a molten state and then melt extruded;

[0023] Step 3: Send the mixture into a shaping mold to gradually shape it to obtain an EPP packaging box.

[0024] Beneficial Effects

[0025] The present invention provides a forming device and a forming method for producing EPP packaging boxes. Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. A forming device and a forming method for producing EPP packaging boxes. Through the cooperation between a foaming tube mechanism, an internal gear ring, a feeding mechanism and a driving rod mechanism, the driving rod mechanism is started to drive the foaming tube mechanism and the feeding mechanism to work together at the same time. During the operation of the feeding mechanism, a set amount of EPP raw material particles converted from recycled plastic waste is intermittently added into the foaming tube mechanism, and the foaming agent in the liquid storage barrel is intermittently sucked into the foaming tube mechanism. During the operation of the foaming tube mechanism, the EPP raw material particles and the foaming agent inside can be automatically stirred, so that the EPP raw material particles and the foaming agent can be fully mixed, thereby improving the foaming efficiency.

[0027] 2. A forming device and a forming method for producing EPP packaging boxes. Through the cooperation between a supporting chassis, a plurality of foaming support cylinders and a mixing rod assembly, each foaming support cylinder is intermittently rotated to the bottom of a feeding mechanism under the drive of a driving rod mechanism, so that EPP raw material particles and foaming agents converted from recycled plastic waste can be put into each foaming support cylinder in batches, avoiding the problem of uneven mixing caused by a large amount of raw materials and foaming agents being put into a single foaming cylinder at one time. Since the raw materials and foaming agents are evenly distributed to a plurality of foaming support cylinders, the mixing amount in each foaming support cylinder is relatively small, and the required stirring time is correspondingly shortened, further improving production efficiency.

[0028] 3. A forming device and forming method for producing EPP packaging boxes, through the mutual cooperation among the liquid pumping cylinder assembly, the feeding disc, the horizontal axis, the cam and the first bevel gear, since the second bevel gear is meshed with the first bevel gear, the servo motor drives the connecting shaft and the second bevel gear to rotate, and also drives the horizontal axis to rotate, thereby driving the feeding disc and the cam to rotate. During the rotation of the feeding disc, when the material trough rotates to the upper side and communicates with the storage hopper, the EPP raw material particles in the storage hopper will partially slide into the material trough under the action of their own gravity to fill it, and the EPP raw material particles in the material trough are filled with the rotation of the feeding disc. The foaming agent in the liquid storage barrel is sucked into the cylinder body through the liquid outlet pipe, and the foaming agent in the liquid storage barrel is sucked into the cylinder body by the suction force, so as to achieve the purpose of intermittently injecting the foaming agent into each foaming cylinder. The operation is convenient and efficient.

[0029] 4. A forming device and a forming method for producing EPP packaging boxes. Through the mutual cooperation between the first mixing support rod, the second mixing support rod, the gear and the inner gear ring, as the supporting chassis and multiple foaming support tubes rotate together, since the gear on each foaming support tube is meshed with the inner gear ring, the mixing rod assembly in each foaming support tube will rotate on its own, so that the EPP raw material particles and the foaming agent in the foaming support tube can be automatically stirred to fully mix them to achieve a foaming reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a first stereogram of the present invention;

[0031] Figure 2 is a second stereogram of the present invention;

[0032] Figure 3 is a third stereogram of the present invention;

[0033] Figure 4 is a cutaway perspective view of the present invention;

[0034] Figure 5 It is a first sectional stereoscopic view of the lower working barrel, the upper working barrel and the protective cover of the present invention;

[0035] Figure 6 It is a second sectional stereoscopic view of the lower working barrel, the upper working barrel and the protective cover of the present invention;

[0036] Figure 7 A three-dimensional diagram of the foam support tube of the present invention;

[0037] Figure 8 It is a sectional stereoscopic view of the foam support tube of the present invention;

[0038] Fig. 9 It is an assembly stereogram of the feeding mechanism and the driving rod mechanism of the present invention;

[0039] Fig.10 It is a cutaway perspective view of the feeding mechanism of the present invention;

[0040] Fig.11 For the present invention Fig.10 A partial enlarged view of the middle A;

[0041] Fig.12 is a three-dimensional diagram of a hollow dish of the present invention;

[0042] Fig.13 is a cutaway perspective view of the hollow disk of the present invention;

[0043] Fig.14 A three-dimensional diagram of a liquid extraction cylinder assembly of the present invention;

[0044] Fig.15 It is a sectional stereoscopic view of the cylinder of the present invention.

[0045] In the figure: 1, lower working barrel; 2, upper working barrel; 3, foaming barrel mechanism; 31, bearing chassis; 32, foaming support barrel; 33, mixing rod assembly; 331, first shaft rod; 332, first mixing support rod; 333, second shaft rod; 334, second mixing support rod; 335, gear; 34, discharge pipe; 35, solenoid valve; 4, protective cover; 5, inner gear ring; 6, feeding mechanism; 61, containing box; 62, partition; 63, hollow plate; 64, storage hopper; 65 , feed pipe; 66, liquid pumping cylinder assembly; 661, cylinder body; 662, piston block; 663, piston rod; 664, top plate; 665, spring; 666, liquid outlet pipe; 667, liquid inlet pipe; 668, L-shaped elbow; 67, feed tray; 68, horizontal axis; 69, cam; 610, transmission; 611, first bevel gear; 7, drive rod mechanism; 71, servo motor; 72, connecting shaft; 73, connecting frame; 74, second bevel gear; 8, liquid storage barrel. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] The present invention provides two technical solutions:

[0048] like Figures 1 to 4 A first embodiment is shown: a forming device for producing an EPP packaging box, comprising:

[0049] A lower working barrel 1, an upper working barrel 2 is arranged on the top of the lower working barrel 1 through a connecting plate, the lower working barrel 1 and the upper working barrel 2 are placed on the ground through a plurality of supporting legs, a protective cover 4 is fixedly arranged on the bottom of the lower working barrel 1, an inner gear ring 5 is fixedly arranged in the inner cavity of the protective cover 4 through a plurality of supporting plates, a liquid storage barrel 8 is arranged behind the lower working barrel 1 and the upper working barrel 2 for containing a foaming agent, and the liquid storage barrel 8 is placed on the ground;

[0050] The foaming barrel mechanism 3 is used to fuse the EPP raw material particles converted from the recycled plastic waste with the foaming agent to perform a foaming reaction. The foaming barrel mechanism 3 is arranged between the lower working barrel 1 and the interior of the upper working barrel 2;

[0051] A feeding mechanism 6 is used for intermittently feeding EPP raw material particles and foaming agent converted from recycled plastic waste into the foaming barrel mechanism 3. The feeding mechanism 6 is arranged on the top right side of the upper working barrel 2;

[0052] The driving rod mechanism 7 is used to drive the foaming tube mechanism 3 to rotate and drive the feeding mechanism 6 to work. The driving rod mechanism 7 is arranged between the lower working barrel 1, the upper working barrel 2 and the inside of the feeding mechanism 6.

[0053] By cooperating with each other among the foaming tube mechanism 3, the inner gear ring 5, the feeding mechanism 6 and the driving rod mechanism 7, the driving rod mechanism 7 can be started to drive the foaming tube mechanism 3 and the feeding mechanism 6 to work together at the same time. During the operation of the feeding mechanism 6, a set amount of EPP raw material particles converted from recycled plastic waste is intermittently added to the foaming tube mechanism 3, and the foaming agent in the liquid storage barrel 8 is intermittently sucked into the foaming tube mechanism 3. During the operation of the foaming tube mechanism 3, the EPP raw material particles and the foaming agent inside can be automatically stirred, so that the EPP raw material particles and the foaming agent can be fully mixed, thereby improving the foaming efficiency.

[0054] like Figures 5 to 15A second embodiment is shown, which mainly differs from the first embodiment in that: a forming device for producing EPP packaging boxes, a foaming tube mechanism 3 includes a bearing chassis 31, the vertical section of the bearing chassis 31 is I-shaped, the bearing chassis 31 rotates and penetrates the bottom of the lower working barrel 1, a plurality of foaming support tubes 32 are evenly and fixedly arranged around the top of the bearing chassis 31, the top of each foaming support tube 32 is in contact with the top wall of the inner cavity of the upper working barrel 2, a mixing rod assembly 33 is rotatably arranged in the inner cavity of each foaming support tube 32, a discharge pipe 34 that penetrates to the bottom of the bearing chassis 31 is fixedly arranged at the bottom of each foaming support tube 32, a solenoid valve 35 located below the bearing chassis 31 is fixedly arranged on the upper part of the discharge pipe 34, and each mixing rod assembly 33 The first shaft 331 includes a first shaft 331, the bottom of the first shaft 331 rotates and penetrates between the foaming support tube 32 and the bottom of the supporting chassis 31, the outer wall of the first shaft 331 is evenly fixed with a plurality of first mixing support rods 332 located in the foaming support tube 32, and the plurality of first mixing support rods 332 are spirally distributed outside the first shaft 331, and the top of the first shaft 331 is fixed with a second shaft 333, and the outer wall of the second shaft 333 is evenly fixed with a plurality of second mixing support rods 334, and the plurality of second mixing support rods 334 are spirally distributed outside the second shaft 333. The spiral shape formed by the plurality of second mixing support rods 334 is opposite to the spiral shape formed by the plurality of first mixing support rods 332, and the bottom of the first shaft 331 is fixed. A gear 335 is sleeved and located below the supporting chassis 31, and the gear 335 is meshed with the inner gear ring 5. The feeding mechanism 6 includes a accommodating box 61, which is fixedly arranged on the top right side of the upper working barrel 2, and a partition 62 is fixedly arranged between the side walls of the left part of the inner cavity of the accommodating box 61. A hollow disk 63 is fixedly penetrated through the top of the accommodating box 61, and a storage hopper 64 is fixedly connected to the top of the hollow disk 63. A sealing cover is arranged on the top of the storage hopper 64, and a discharge pipe 65 is fixedly connected to the bottom of the hollow disk 63. The bottom of the discharge pipe 65 is fixedly penetrated through the top of the upper working barrel 2, and a liquid pumping cylinder assembly 66 is arranged in the accommodating box 61 and between the two sides of the discharge pipe 65. A feed disc body 67 is rotatably arranged between the inner walls of the hollow disk 63, and the top of the feed disc body 67 is opened. A material trough is provided, a horizontal axis 68 is fixedly passed through the middle of the inner part of the feeding disc body 67, the left and right ends of the horizontal axis 68 pass through the outer wall of the hollow disc 63, the right end of the horizontal axis 68 is rotatably connected to the right wall of the inner cavity of the containing box 61, and a cam 69 is fixedly sleeved on the outside of the horizontal axis 68 and on both sides of the hollow disc 63, a transmission 610 is fixedly provided on the right side of the partition 62, the output shaft of the transmission 610 is fixedly connected to the left end of the horizontal axis 68, the input shaft of the transmission 610 rotates and passes through the left wall of the partition 62 and is fixedly provided with a first bevel gear 611, the liquid extraction cylinder assembly 66 includes two cylinders 661, the rear ends of the two cylinders 661 are fixedly connected to the rear wall of the inner cavity of the containing box 61 through a rod body, and the two cylinders 661 are respectively located on the left and right sides of the discharge pipe 65,A piston block 662 is slidably arranged between the inner walls of each cylinder 661, a piston rod 663 is fixedly arranged on the top of the piston block 662, the top of the piston rod 663 slides through the top of the cylinder 661 and is fixedly arranged with a top plate 664, the top plate 664 is located directly below the corresponding cam 69, a spring 665 is sleeved on the outside of the piston rod 663, the spring 665 is located between the top of the cylinder 661 and the bottom of the top plate 664, the bottom of the cylinder 661 is fixedly connected with a liquid outlet pipe 666, the bottom of the liquid outlet pipe 666 is fixedly passed through the top of the upper working barrel 2, the upper part of the liquid outlet pipe 666 is fixedly provided with a liquid outlet valve located above the upper working barrel 2, the rear end bottom of the cylinder 661 is fixedly connected with a liquid inlet pipe 667, the front part of the liquid inlet pipe 667 is fixedly provided with a liquid inlet valve, the rear end of the liquid inlet pipe 667 is fixedly provided with a liquid outlet valve located above the upper working barrel 2, The rear wall of the receiving box 61 is fixedly penetrated, and an L-shaped elbow 668 is fixedly connected between the two liquid inlet pipes 667. The bottom of the L-shaped elbow 668 is fixedly penetrated through the top of the liquid storage barrel 8 and extends to the lower part of its inner cavity. The driving rod mechanism 7 includes a servo motor 71, which is fixedly connected to the left side of the top of the receiving box 61. The output end of the servo motor 71 penetrates the top of the receiving box 61 and is fixedly provided with a connecting shaft 72. The bottom of the connecting shaft 72 rotates through the top of the upper working barrel 2 and is fixedly connected to the middle of the top of the supporting chassis 31. The lower fixed sleeve of the connecting shaft 72 is provided with a connecting frame 73, and the connecting frame 73 is fixedly connected to the side walls of the plurality of foaming support tubes 32. The upper fixed sleeve of the connecting shaft 72 is provided with a second bevel gear 74, and the right side of the second bevel gear 74 is meshed with the bottom of the first bevel gear 611.

[0055] Through the cooperation among the supporting chassis 31, the multiple foaming support cylinders 32 and the mixing rod assembly 33, each foaming support cylinder 32 is intermittently rotated to the right below the feeding mechanism 6 under the drive of the driving rod mechanism 7, so that the EPP raw material particles and the foaming agent converted from the recycled plastic waste can be put into each foaming support cylinder 32 in batches, avoiding the problem of uneven mixing caused by a large amount of raw materials and foaming agents being put into a single foaming cylinder at one time. Since the raw materials and foaming agents are evenly distributed to the multiple foaming support cylinders 32, the mixing amount in each foaming support cylinder 32 is relatively small, and the required stirring time is correspondingly shortened, further improving the mixing efficiency. High production efficiency, through the mutual cooperation among the pumping cylinder assembly 66, the feeding disc body 67, the horizontal shaft 68, the cam 69 and the first bevel gear 611, since the second bevel gear 74 is meshed with the first bevel gear 611, the servo motor 71 drives the connecting shaft 72 and the second bevel gear 74 to rotate, and also drives the horizontal shaft 68 to rotate, thereby driving the feeding disc body 67 and the cam 69 to rotate. During the rotation of the feeding disc body 67, when the material trough rotates to the upper side and is connected with the storage hopper 64, the EPP raw material particles in the storage hopper 64 will partially slide into the material trough under the action of their own gravity to fill it, and the EPP raw material particles in the material trough will be filled. The material particles are transported downward with the rotation of the feeding disc 67, and finally automatically fall into the foaming support cylinder 32 directly below through the feeding pipe 65 under the action of their own gravity, so as to achieve the purpose of intermittently feeding EPP raw material particles into each foaming support cylinder 32. During the rotation of the cam 69, the top plate 664 is pushed downward intermittently, and the piston block 662 moves downward accordingly, and the foaming agent sucked up from the liquid storage barrel 8 in the cylinder 661 is pushed into the foaming cylinder mechanism 3 through the liquid outlet pipe 666. After that, under the elastic action of the spring 665, the top plate 664 moves up again, and the piston block 662 moves up and returns to its original position. In the process, the liquid storage barrel is pushed up by the suction force. 8 is sucked into the cylinder 661 again, so as to achieve the purpose of intermittently injecting the foaming agent into each foaming branch cylinder 32. The operation is convenient and efficient. Through the mutual cooperation between the first mixing support rod 332, the second mixing support rod 334, the gear 335 and the inner gear ring 5, as the supporting chassis 31 and multiple foaming branches 32 rotate together, since the gear 335 on each foaming branch cylinder 32 is meshed with the inner gear ring 5, the mixing rod assembly 33 in each foaming branch cylinder 32 will rotate on its own, so that the EPP raw material particles and the foaming agent in the foaming branch cylinder 32 can be automatically stirred, so that they are fully mixed to achieve a foaming reaction.

[0056] The embodiment of the present invention further provides a molding method for producing an EPP packaging box, using a molding device for producing an EPP packaging box, and the specific method includes the following steps:

[0057] Step 1: Put the EPP raw material particles converted from recycled plastic waste into the storage hopper 64 in advance, and inject the foaming agent into the liquid storage barrel 8, then start the servo motor 71 to drive the connecting shaft 72, the connecting frame 73 and the second bevel gear 74 to rotate. Since the second bevel gear 74 is meshed with the first bevel gear 611, the second bevel gear 74 will also drive the first bevel gear 611 to rotate during its rotation. At the same time, under the action of the transmission 610, the horizontal shaft 68 will rotate at a set speed, thereby driving the feed tray 67 and the cam 69 to rotate. During the rotation of the feed tray 67, when the material trough rotates, When the upper part is connected with the storage hopper 64, the EPP raw material particles in the storage hopper 64 will partially slide into the material tank under the action of their own gravity, filling the interior of the material tank. The EPP raw material particles in the material tank are transported downward as the feeding disc 67 rotates, and finally automatically fall into the foaming support cylinder 32 directly below through the feeding pipe 65 under the action of their own gravity. During the rotation of the cam 69, the top plate 664 is pushed downward intermittently, and the piston block 662 moves downward accordingly, pushing the foaming agent sucked up from the liquid storage barrel 8 in the cylinder 661 through the liquid outlet pipe 666 to the foaming support cylinder 32 directly below, realizing the foaming process. The purpose of intermittently putting EPP raw material particles and foaming agent into the foaming support tube 32 is that under the elastic action of the spring 665, the top plate 664 moves up again, and the piston block 662 moves up and returns to its original position. In the process, the foaming agent in the liquid storage barrel 8 is sucked into the cylinder body 661 again by the suction force, wherein the side wall of the cam 69 is always in contact with the top of the top plate 664. During the rotation of the connecting shaft 72 and the connecting frame 73, the supporting chassis 31 and multiple foaming support tubes 32 are driven to rotate together, so that each foaming support tube 32 intermittently rotates to the bottom of the feeding pipe 65 and the liquid outlet pipe 666, wherein the feeding pipe 65 and the liquid outlet pipe The setting of 666 does not affect the revolution of the foaming support tube 32, so that the EPP raw material particles and the foaming agent are put into each foaming support tube 32 in batches. Since the gear 335 on each foaming support tube 32 is meshed with the inner gear ring 5, the mixing rod assembly 33 inside the foaming support tube 32 will rotate during the revolution, and the EPP raw material particles and the foaming agent in the foaming support tube 32 will be automatically stirred to fully mix them to achieve the foaming reaction. When the foaming reaction in one of the foaming support tubes 32 is completed, the corresponding solenoid valve 35 at the bottom is opened, and the foamed mixture inside is discharged downward through the discharge pipe 34;

[0058] Step 2: The discharged mixture is then fed into a melt extruder, wherein the melt extruder belongs to the prior art well known to those skilled in the art, under the action of the melt extruder, the mixture is heated to a molten state, and then melt-extruded;

[0059] Step 3: squeeze the mixture into a shaping mold to gradually shape it to obtain an EPP packaging box. After shaping is completed, take the EPP packaging box out of the mold and cool it.

[0060] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A forming device for producing EPP packaging boxes, characterized in that: include: A lower working barrel (1), the top of the lower working barrel (1) is provided with an upper working barrel (2) via a connecting plate, the lower working barrel (1) and the upper working barrel (2) are placed on the ground via a plurality of supporting legs, a protective cover (4) is fixedly provided at the bottom of the lower working barrel (1), an inner toothed ring (5) is fixedly provided in the inner cavity of the protective cover (4) via a plurality of supporting plates, a liquid storage barrel (8) is provided behind the lower working barrel (1) and the upper working barrel (2) for containing a foaming agent, and the liquid storage barrel (8) is placed on the ground; A foaming barrel mechanism (3) is used to fuse EPP raw material particles converted from recycled plastic waste with a foaming agent to perform a foaming reaction, wherein the foaming barrel mechanism (3) is arranged between the interior of the lower working barrel (1) and the interior of the upper working barrel (2); A feeding mechanism (6) is used for intermittently feeding EPP raw material particles and foaming agent converted from recycled plastic waste into the foaming barrel mechanism (3), wherein the feeding mechanism (6) is arranged on the top right side of the upper working barrel (2); The driving rod mechanism (7) is used to drive the foaming tube mechanism (3) to rotate and drive the feeding mechanism (6) to work. The driving rod mechanism (7) is arranged between the lower working barrel (1), the upper working barrel (2) and the inside of the feeding mechanism (6).

2. A forming device for producing EPP packaging boxes according to claim 1, characterized in that: The foaming tube mechanism (3) comprises a bearing chassis (31), the bearing chassis (31) is rotatably connected to the bottom of the lower working barrel (1), a plurality of foaming branches (32) are evenly and fixedly arranged around the top of the bearing chassis (31), the top of each foaming branch tube (32) is in contact with the top wall of the inner cavity of the upper working barrel (2), a mixing rod assembly (33) is rotatably arranged in the inner cavity of each foaming branch tube (32), a discharge pipe (34) is fixedly arranged at the bottom of each foaming branch tube (32) and is connected to the bottom of the bearing chassis (31), and a solenoid valve (35) located below the bearing chassis (31) is fixedly arranged on the upper part of the discharge pipe (34).

3. A forming device for producing EPP packaging boxes according to claim 2, characterized in that: Each of the mixing rod assemblies (33) comprises a first shaft (331), the bottom of the first shaft (331) is rotatably inserted between the foaming support tube (32) and the bottom of the supporting chassis (31), a plurality of first mixing support rods (332) located in the foaming support tube (32) are evenly and fixedly arranged on the outer wall of the first shaft (331), the plurality of first mixing support rods (332) are spirally distributed outside the first shaft (331), and a second shaft (333) is fixedly arranged on the top of the first shaft (331). A plurality of second mixing support rods (334) are evenly and fixedly arranged on the outer wall of the second shaft rod (333), and the plurality of second mixing support rods (334) are spirally distributed outside the second shaft rod (333). The spiral shape formed by the plurality of second mixing support rods (334) is opposite to the spiral shape formed by the plurality of first mixing support rods (332). A gear (335) located below the supporting chassis (31) is fixedly sleeved at the bottom of the first shaft rod (331), and the gear (335) is meshed with the inner gear ring (5).

4. A forming device for producing EPP packaging boxes according to claim 2, characterized in that: The feeding mechanism (6) comprises a containing box (61), the containing box (61) is fixedly arranged on the top right side of the upper working barrel (2), a partition (62) is fixedly arranged between the side walls of the left part of the inner cavity of the containing box (61), a hollow disk (63) is fixedly penetrated through the top of the containing box (61), the top of the hollow disk (63) is fixedly connected to a storage hopper (64), the top of the storage hopper (64) is provided with a sealing cover, the bottom of the hollow disk (63) is fixedly connected to a discharge pipe (65), the bottom of the discharge pipe (65) is fixedly penetrated through the top of the upper working barrel (2), and a liquid extraction cylinder assembly (66) is arranged in the containing box (61) and between the two sides of the discharge pipe (65).

5. A forming device for producing EPP packaging boxes according to claim 4, characterized in that: A material feeding disc body (67) is rotatably arranged between the inner walls of the hollow disc (63), a material containing groove is provided on the top of the material feeding disc body (67), a horizontal shaft (68) is fixedly passed through the middle of the inner part of the material feeding disc body (67), the left and right ends of the horizontal shaft (68) both pass through the outer wall of the hollow disc (63), the right end of the horizontal shaft (68) is rotatably connected to the right wall of the inner cavity of the containing box (61), and cams (69) are fixedly sleeved on the outside of the horizontal shaft (68) and on both sides of the hollow disc (63), a transmission (610) is fixedly arranged on the right side of the partition (62), the output shaft of the transmission (610) is fixedly connected to the left end of the horizontal shaft (68), and the input shaft of the transmission (610) rotatably passes through the left wall of the partition (62) and is fixedly provided with a first bevel gear (611).

6. A forming device for producing EPP packaging boxes according to claim 5, characterized in that: The liquid extraction cylinder assembly (66) includes two cylinders (661), the rear ends of the two cylinders (661) are fixedly connected to the rear wall of the inner cavity of the containing box (61) through a rod body, and the two cylinders (661) are respectively located on the left and right sides of the discharge pipe (65), and a piston block (662) is slidably arranged between the inner walls of each cylinder (661), and a piston rod (663) is fixedly arranged on the top of the piston block (662).

7. A forming device for producing EPP packaging boxes according to claim 6, characterized in that: The top of the piston rod (663) slides through the top of the cylinder (661) and is fixedly provided with a top plate (664), and the top plate (664) is located directly below the corresponding cam (69). The outside of the piston rod (663) is provided with a spring (665), and the spring (665) is located between the top of the cylinder (661) and the bottom of the top plate (664).

8. The forming device for producing EPP packaging boxes according to claim 6, characterized in that: The bottom of the cylinder (661) is fixedly connected to a liquid outlet pipe (666), the bottom of which is fixedly passed through the top of the upper working barrel (2), the upper portion of the liquid outlet pipe (666) is fixedly provided with a liquid outlet valve located above the upper working barrel (2), the bottom of the rear end of the cylinder (661) is fixedly connected to a liquid inlet pipe (667), the front portion of which is fixedly provided with a liquid inlet valve, the rear end of the liquid inlet pipe (667) is fixedly passed through the rear wall of the containing box (61), an L-shaped curved pipe (668) is fixedly connected between the two liquid inlet pipes (667), the bottom of which is fixedly passed through the top of the liquid storage barrel (8) and extends to the lower portion of its inner cavity.

9. The forming device for producing EPP packaging boxes according to claim 5, characterized in that: The driving rod mechanism (7) comprises a servo motor (71), the servo motor (71) is fixedly connected to the left side of the top of the containing box (61), the output end of the servo motor (71) passes through the top of the containing box (61) and is fixedly provided with a connecting shaft (72), the bottom of the connecting shaft (72) rotates through the top of the upper working barrel (2) and is fixedly connected to the middle of the top of the supporting chassis (31), the lower fixed sleeve of the connecting shaft (72) is provided with a connecting frame (73), the connecting frame (73) is fixedly connected to the side walls of the plurality of foaming support tubes (32), the upper fixed sleeve of the connecting shaft (72) is provided with a second bevel gear (74), the right side of the second bevel gear (74) is meshed with the bottom of the first bevel gear (611).

10. A molding method for producing EPP packaging boxes, characterized in that: Using the forming device for producing EPP packaging boxes as described in any one of claims 1 to 9, the method comprises the following steps: Step 1: Put EPP raw material particles converted from recycled plastic waste into the feeding mechanism (6) in advance, and inject the foaming agent into the liquid storage barrel (8), then start the driving rod mechanism (7), drive the foaming tube mechanism (3) to rotate, and drive the feeding mechanism (6) to work at the same time. During the operation of the feeding mechanism (6), a set amount of EPP raw material particles is intermittently added into the foaming tube mechanism (3), and the foaming agent in the liquid storage barrel (8) is intermittently sucked into the foaming tube mechanism (3). During the rotation of the foaming tube mechanism (3), the EPP raw material particles and the foaming agent inside are automatically stirred to fully mix the EPP raw material particles and the foaming agent to perform a foaming reaction, and then the foamed mixture is discharged through the bottom of the foaming tube mechanism (3); Step 2: The mixture is then fed into a melt extruder, where the mixture is heated to a molten state and then melt extruded; Step 3: Send the mixture into a shaping mold to gradually shape it to obtain an EPP packaging box.

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