A continuous processing equipment and process for multi-layer co-extruded high-barrier IBC container barrels

Abstract

The present invention discloses a continuous processing device and process for a multi-layer co-extruded high-barrier IBC container barrel, comprising an extrusion mechanism and a molding mechanism connected to its bottom output end, a molding die being provided below the molding mechanism, and the molding mechanism comprising a heat-insulating outer shell and an inner core, an inner molding cylinder, and a middle molding cylinder arranged therein from the inside to the outside. The present invention relates to the technical field of extrusion equipment. The continuous processing device and process for a multi-layer co-extruded high-barrier IBC container barrel can simultaneously extrude multiple layers of plastic films inside and outside by arranging the inner core, the inner molding cylinder, the middle molding cylinder, and the heat-insulating outer shell, and different types of layers can be extruded by adding different raw materials, which can improve product quality under complementary effects. By arranging a structure for blowing air toward the middle at the innermost and outermost sides, the films on both sides can be urged to move closer to the middle and fit together. At the same time, under the extrusion of air, not only will the surface of the film not be damaged, but the air between the films can also be squeezed out to avoid the formation of bubbles between the film layers.

Description

Technical Field

[0001] The present invention relates to the technical field of extrusion equipment, and in particular to continuous processing equipment and technology for multi-layer co-extruded high-barrier IBC container barrels. Background Art

[0002] IBC medium-sized container barrels are essential tools for modern warehousing and transportation of liquid products. They consist of an inner container and a metal frame. The inner container is blow-molded from high-molecular-weight, high-density polyethylene, offering high strength, corrosion resistance, and excellent hygiene. Some existing IBC medium-sized container barrels are manufactured using a multi-layer co-extrusion process, resulting in even greater strength. During processing, multiple layers of plastic film are extruded simultaneously, forming a nested, interlocking structure. For example, Chinese patent CN210161572U discloses a multi-layer co-extrusion die head for plastic molding. This die head connects the extruder to a flow guide mechanism via first, second, and third flow channels, allowing the molten plastic in the extruder to sequentially form a uniformly thick plastic layer that is extruded along the die head. This streamlines process operations, frees up labor, reduces production costs, and improves the company's economic benefits.

[0003] However, the device directly extrude the plastic layer outside the central plastic layer, and air is easily present between the plastic layers, and bubbles are formed after the film layers stick together. Even if the bubbles are dispersed after blow molding or the outside is smooth and invisible, the local quality of the product will be reduced. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a continuous processing equipment and process for multi-layer co-extruded high-barrier IBC container barrels, which solves the problem that air is easily present between plastic layers, and bubbles are formed after adhesion between film layers. Even if the bubbles are dispersed or the outside is smooth and invisible after blow molding, the local quality of the product will be reduced.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A continuous processing device for multi-layer co-extruded high-barrier IBC container barrels, including an extrusion mechanism and a molding mechanism connected to its bottom output end, a molding die is provided below the molding mechanism, the molding mechanism includes a heat-insulating outer shell and an inner core, an inner molding cylinder, and a middle molding cylinder arranged therein from the inside to the outside, and extrusion molding channels are formed with equal spacing between the inner core, the inner molding cylinder, the middle molding cylinder, and the lower half of the heat-insulating outer shell;

[0006] The bottom of the inner core cavity is fixedly connected to an air guide cylinder, and an annular tube is provided at the bottom of the outer side of the heat-insulating outer shell. Air ducts for blowing air obliquely downward are provided on the inner side of the annular tube and between the inner core and the bottom of the air guide cylinder. An air inlet is provided on the side of the air guide cylinder, and the outside of the heat-insulating outer shell is fixedly connected to an inflation heating structure, and the air outlet end of the inflation heating structure is respectively connected to the annular tube and the inner core and filled with hot air. The side walls of the inner forming cylinder and the middle forming cylinder are hollow, and the top of one side of the inner forming cylinder and the middle forming cylinder are jointly fixedly connected to an exhaust pipe that runs through the outside of the heat-insulating outer shell, and the outer end of the exhaust pipe is threadedly connected to an end cover, and the end face of the end cover is fixedly connected to a cross valve.

[0007] Preferably, the inflation heating structure includes an electric heating tube fixedly connected to the side of the insulation shell through a bracket, the top of the electric heating tube is connected to a main inflation tube that runs through the inner core, and an auxiliary inflation tube is connected between the bottom of the main inflation tube and the top of the ring tube.

[0008] Preferably, the forming molds are arranged in pairs and include an outer cover and a heat-conducting lining arranged inside the outer cover. A heat dissipation channel with uniform spacing is formed between the outer cover and the heat-conducting lining, and the bottom of the outer side of the outer cover is connected to an input pipe. The bottom of the electric heating tube is connected to two air ducts through a tee, and the bottom ends of the two air ducts are respectively connected to the tops of the heat dissipation channels of the two forming molds.

[0009] Preferably, the top center of the inner forming tube passes upward to the top of the heat-insulating outer shell, and the top of the inner forming tube is threadedly connected to the first injection pipe through a threaded sleeve, and the top of the heat-insulating outer shell is fixedly connected to the second injection pipe and the third injection pipe in a triangular distribution with respect to the top of the first injection pipe, and the bottom ends of the second injection pipe and the third injection pipe are respectively connected to the heat-insulating outer shell and the inner cavity of the middle forming tube.

[0010] Preferably, the extrusion mechanism includes a triangularly distributed screw extruder, and the outside of the screw extruder is fixed by a fixed sleeve, the top of the auger of the three screw extruders are fixedly connected to an external gear, and the three external gears are commonly meshed with a central gear, the top of the screw extruder is fixedly connected to a protective cover covering the external gear and the central gear, and the top of the protective cover is fixedly connected to a drive motor that drives the central gear to rotate.

[0011] Preferably, the top ends of the sides of the three screw extruders are all provided with raw material adding structures, and the three groups of raw material adding structures respectively extract different raw materials and discharge them into the three screw extruders through external fans. The raw material adding structure includes a feed barrel fixedly connected to the top end of the side of the screw extruder, one side of the feed barrel is connected to an elbow, and the top of the corner part of the elbow is higher than the end connected to the feed barrel, the bottom end of the elbow is fixedly connected to a feed hose, the outside of the elbow corner is connected to an air outlet pipe, and the outside of the air outlet pipe is threadedly connected to a screw cover, and the end of the screw cover and the inner side of the elbow corner are fixedly connected to a filter screen, and the inside and outside of the feed barrel are jointly provided with an opening and closing structure for controlling the opening and closing of the feed barrel.

[0012] Preferably, the opening and closing structure includes a turntable rotatably connected to the inside of the feed barrel, and an inner semicircular hole is provided inside the turntable, and an outer semicircular hole is provided on the side of the feed barrel and on the inner side of the elbow. The conduction amount of the feed barrel can be controlled by controlling the rotation of the turntable to control the overlap between the inner semicircular hole and the outer semicircular hole. The external rotating sleeve of the feed barrel is provided with a gear ring, and the inner side of the gear ring is fixedly connected to a connecting rod that passes through the feed barrel and connected to the turntable, and a limiting slide groove is provided on the side of the feed barrel to limit the connecting rod from rotating 90°.

[0013] Preferably, the external rotating sleeves of the three screw extruders are provided with a gear ring, which is located above the upper fixed sleeve and between the gear ring and meshed with the gear ring. A servo motor is fixedly connected to one side of the screw extruder and located above the gear ring through a bracket, and the output end of the servo motor is fixedly connected to a driving gear meshed with the gear ring.

[0014] The present invention also discloses a continuous processing technology for multi-layer co-extruded high-barrier IBC container barrels, which is characterized by comprising the following steps:

[0015] S1. First, the materials of different layers of the multi-layer co-extruded high barrier IBC container are respectively discharged into different extrusion mechanisms for heating, melting and extrusion;

[0016] S2. The material is extruded into a forming mechanism through an extrusion mechanism to be formed into an annular film bag and then output downward. At the same time, hot air is blown from both sides of the forming mechanism toward the middle to facilitate the adhesion of the multiple layers of plastic film and squeeze out the air between the multiple layers of plastic film and discharge it upward.

[0017] S3. The discharged multi-layer plastic film is discharged into the opened forming mold, and the driving structure of the forming mold is started to drive it to close. After the multi-layer plastic film is clamped, the top is cut off, and then the film is blown and formed. Finally, the forming mold is opened to take out the IBC container.

[0018] Preferably, the hot air in S2 is obtained by absorbing heat from the cold air flowing through the forming mold and then being heated. To ensure the cooling effect, the cold air discharged into the forming mold is first cooled.

[0019] Beneficial effects

[0020] The present invention provides a continuous processing device and process for multi-layer co-extruded high-barrier IBC container barrels.

[0021] Compared with the existing technology, it has the following beneficial effects:

[0022] 1. The continuous processing equipment and process of the multi-layer co-extruded high-barrier IBC container barrel can extrude multiple layers of plastic films inside and outside at the same time by arranging an inner core, an inner forming cylinder, a middle forming cylinder and an insulating outer shell. Different types of layers can be extruded by adding different raw materials, which can improve product quality through complementary effects. By arranging a structure for blowing air into the middle on the innermost and outermost sides, the films on both sides can be urged to move closer to the middle and fit together. At the same time, the air extrusion will not only not damage the film surface, but also squeeze out the air between the films, avoiding bubbles between the film layers, thereby ensuring the quality of the finished product.

[0023] 2. The continuous processing equipment and process of the multi-layer co-extruded high-barrier IBC container barrel is equipped with an inflatable heating structure, which can provide hot air to blow the multi-layer plastic film to make it fit. The air source of the inflatable heating structure passes through the forming mold, and the cold air is used to cool the product in the forming mold while recycling heat to preheat the air, so that the electric heating tube heats up faster, which is more energy-saving and environmentally friendly.

[0024] 3. The continuous processing equipment and process of the multi-layer co-extruded high-barrier IBC container barrel, by setting a gear transmission structure on the top, can make one motor control three screw extruders to work simultaneously, which is convenient for control and reduces costs. By setting an opening and closing structure in the feeding barrel, it can be closed when the raw materials are just discharged, so that the raw materials are accumulated in the feeding barrel to a certain amount, and then opened to add raw materials. The raw materials can be used to block the entry of air, thereby minimizing the amount of air entering the screw extruder, that is, avoiding a large number of bubbles in the molten plastic, which can improve product quality. A filter is set on the corner side of the elbow to separate the raw materials from the air. The filter set on the side can be washed by the raw materials at all times, which can reduce the chance of blockage and maintain a long-term filtering effect.

[0025] 4. The continuous processing equipment and process of the multi-layer co-extruded high-barrier IBC container barrel controls the internal turntable by setting a gear ring on the outside of the feed barrel. Only the rotation of the gear ring can be controlled to simultaneously control the rotation of the three gear rings and the turntable, thereby realizing the opening and closing of the feed barrel and the simultaneous opening and feeding of materials, which is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front view of the overall structure of the present invention;

[0027] Figure 2Schematic diagram of the internal structure of the molding mechanism of the present invention;

[0028] Figure 3 is a cross-sectional view of the molding mechanism of the present invention;

[0029] Figure 4 For the present invention Figure 3 A partial enlarged view of point A in the middle;

[0030] Figure 5 A top view of the arrangement of the injection pipe and the screw extruder of the present invention;

[0031] Figure 6 It is a front view of the extrusion mechanism and the molding mechanism of the present invention;

[0032] Figure 7 A top view of a partial structure of the extrusion mechanism of the present invention;

[0033] Figure 8 This is a cross-sectional view of the raw material adding structure of the present invention;

[0034] Figure 9 It is a side sectional view of the raw material adding structure of the present invention;

[0035] Figure 10 It is a cross-sectional view of the local structure of the forming mold of the present invention.

[0036] In the figure: 1-extrusion mechanism, 11-screw extruder, 12-fixed sleeve, 13-external gear, 14-center gear, 15-protective cover, 16-drive motor, 17-raw material adding structure, 171-feed barrel, 172-elbow, 173-feed hose, 174-exhaust pipe, 175-screw cover, 176-filter, 177-turntable, 178-inner semicircular hole, 179-outer semicircular hole, 1710-gear ring, 1711-connecting rod, 1712-limiting slide, 18-gear ring, 19-servo motor, 110-drive gear, 2- Molding mechanism, 21-insulation shell, 22-inner core, 23-inner molding tube, 24-middle molding tube, 25-air guide tube, 26-ring tube, 27-air duct, 28-air inlet, 29-inflation heating structure, 291-electric heating tube, 292-main inflation tube, 293-auxiliary inflation tube, 294-air guide tube, 210-exhaust pipe, 211-end cover, 212-cross valve, 213-threaded sleeve, 214-first injection tube, 215-second injection tube, 216-third injection tube, 3-molding mold, 31-outer cover, 32-thermal conductive lining. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0038] The present invention provides four technical solutions:

[0039] Figure 1-3 The first embodiment is shown: a continuous processing device for multi-layer co-extruded high-barrier IBC containers, comprising an extrusion mechanism 1 and a molding mechanism 2 connected to its bottom output end. A molding die 3 is provided below the molding mechanism 2. The molding mechanism 2 comprises an insulating outer shell 21 and an inner core 22, an inner molding cylinder 23, and a middle molding cylinder 24 arranged therein from the inside out. Extrusion molding channels are formed at equal intervals between the inner core 22, the inner molding cylinder 23, the middle molding cylinder 24, and the lower half of the insulating outer shell 21.

[0040] An air guide cylinder 25 is fixedly connected to the bottom of the inner cavity of the inner core 22, and an annular tube 26 is provided at the bottom of the outer side of the heat-insulating outer shell 21. An air duct 27 for blowing air obliquely downward is provided on the inner side of the annular tube 26 and between the bottom of the inner core 22 and the air guide cylinder 25. An air inlet 28 is provided on the side of the air guide cylinder 25. An air-inflating heating structure 29 is fixedly connected to the outside of the heat-insulating outer shell 21, and the air outlet end of the air-inflating heating structure 29 is respectively connected to the annular tube 26 and the inner core 22 and filled with hot air. The side walls of the inner forming cylinder 23 and the middle forming cylinder 24 are hollow, and the top of one side of the inner forming cylinder 23 and the middle forming cylinder 24 are fixedly connected to an exhaust pipe 210 that runs through the outside of the heat-insulating outer shell 21, and the outer end of the exhaust pipe 210 is threadedly connected to an end cover 211, and the end face of the end cover 211 is fixedly connected to a cross valve 212. The cross valve 212 is naturally closed when not under force, which can prevent dust and insects.

[0041] The top center of the inner forming cylinder 23 passes upward to the top of the thermal insulation outer shell 21, and the top of the inner forming cylinder 23 is threadedly connected to the first injection pipe 214 through a threaded sleeve 213. The top of the thermal insulation outer shell 21 is fixedly connected to the second injection pipe 215 and the third injection pipe 216 in a triangular distribution with respect to the top of the first injection pipe 214. The bottom ends of the second injection pipe 215 and the third injection pipe 216 are respectively connected to the inner cavity of the thermal insulation outer shell 21 and the inner forming cylinder 24.

[0042] By arranging the inner core 22, the inner forming tube 23, the middle forming tube 24 and the heat-insulating outer shell 21, the inner and outer multi-layer plastic films can be extruded simultaneously, and different types of layers can be extruded by adding different raw materials. The complementary effect can improve the product quality, and by arranging a structure for blowing air toward the middle on the innermost and outermost sides, the films on both sides can be urged to move closer to the middle and fit together. At the same time, under the extrusion of air, not only will the surface of the film not be damaged, but the air between the films can also be squeezed out to avoid bubbles between the film layers, thereby ensuring the quality of the finished product.

[0043] Figure 1-2 Figures 4 and 5 show a second embodiment, the main difference from the first embodiment is that the inflation heating structure 29 includes an electric heating tube 291 fixedly connected to the side of the thermal insulation shell 21 through a bracket, the top of the electric heating tube 291 is connected to a main inflation tube 292 that passes through the inner core 22, and an auxiliary inflation tube 293 is connected between the bottom of the main inflation tube 292 and the top of the ring tube 26.

[0044] The forming molds 3 are arranged in pairs and include an outer cover 31 and a heat-conducting lining 32 arranged inside the outer cover 31. A heat dissipation channel with a uniform spacing is formed between the outer cover 31 and the heat-conducting lining 32, and the bottom of the outer side of the outer cover 31 is connected to an input pipe. The bottom of the electric heating tube 291 is connected to two air guide pipes 294 through a tee, and the bottom ends of the two air guide pipes 294 are respectively connected to the top of the heat dissipation channel of the two forming molds 3.

[0045] By setting up an inflatable heating structure 29, hot air can be provided to blow the multi-layer plastic film to make it fit together, and the air source of the inflatable heating structure 29 is passed through the forming mold 3. While using cold air to cool and shape the product in the forming mold 3, heat can be recovered to preheat the air, and then the electric heating tube 291 is heated faster, which is more energy-saving and environmentally friendly.

[0046] Figure 1-2 and 4 show a third embodiment, which mainly differs from the second embodiment in that: the extrusion mechanism 1 includes a triangularly distributed screw extruder 11, and the outside of the screw extruder 11 is fixedly mounted by a fixed sleeve 12, the top of the auger of the three screw extruders 11 is fixedly connected to an external gear 13, and the three external gears 13 are commonly meshed with a central gear 14, the top of the screw extruder 11 is fixedly connected to a protective cover 15 covering the external gear 13 and the central gear 14, and the top of the protective cover 15 is fixedly connected to a drive motor 16 for driving the central gear 14 to rotate.

[0047] A raw material adding structure 17 is provided at the top end of the side of the three screw extruders 11. The three groups of raw material adding structures 17 respectively extract different raw materials and discharge them into the three screw extruders 11 through an external fan. The raw material adding structure 17 includes a feed barrel 171 fixedly connected to the top end of the side of the screw extruder 11. One side of the feed barrel 171 is connected to an elbow 172, and the top of the corner part of the elbow 172 is higher than the end connected to the feed barrel 171. The bottom end of the elbow 172 is fixedly connected to a feed hose 173, and the outside of the corner of the elbow 172 is connected to an air outlet pipe 174, and the outside of the air outlet pipe 174 is threadedly connected to a screw cover 175, and the end of the screw cover 175 and the inner side of the corner of the elbow 172 are fixedly connected to a filter screen 176. The inside and outside of the feed barrel 171 are jointly provided with an opening and closing structure for controlling the opening and closing of the feed barrel 171.

[0048] By setting a gear transmission structure at the top, one motor can control three screw extruders 11 to work simultaneously, which is convenient for control and reduces costs. By setting an opening and closing structure in the feed barrel 171, it can be closed when the raw materials are just discharged, so that a certain amount of raw materials are accumulated in the feed barrel 171, and then opened to add raw materials. The raw materials can be used to block the entry of air, thereby minimizing the amount of air entering the screw extruder 11, that is, avoiding a large number of bubbles in the molten plastic, which can improve product quality. A filter 176 is set on the corner side of the elbow 172 to separate the raw materials from the air. The filter 176 set on the side can be washed by the raw materials at all times, which can reduce the chance of blockage and maintain a long-term filtering effect.

[0049] Figure 1-2 and 4 show a fourth embodiment, the main difference from the third embodiment is that: the opening and closing structure includes a turntable 177 rotatably connected to the inside of the feed barrel 171, and an inner semicircular hole 178 is provided inside the turntable 177, and an outer semicircular hole 179 is provided on the side of the feed barrel 171 and on the inner side of the elbow 172. By controlling the rotation of the turntable 177 to control the overlap between the inner semicircular hole 178 and the outer semicircular hole 179, the conduction amount of the feed barrel 171 can be controlled. The outer rotating sleeve of the feed barrel 171 is provided with a gear ring 1710, and the inner side of the gear ring 1710 is fixedly connected with a connecting rod 1711 that passes through the feed barrel 171 and is connected to the turntable 177. The side of the feed barrel 171 is provided with a limiting slide groove 1712 for limiting the connecting rod 1711 from rotating 90°.

[0050] The three screw extruders 11 are externally provided with a commonly rotating sleeve with a ring gear 18. The ring gear 18 is located above the upper fixed sleeve 12 and between the gear ring 1710 and is engaged with the gear ring 1710. A servo motor 19 is fixedly connected to one side of the screw extruder 11 and located above the gear ring 18 through a bracket. The output end of the servo motor 19 is fixedly connected to a drive gear 110 that is engaged with the gear ring 18.

[0051] By setting a gear ring 1710 on the outside of the feed barrel 171 to control the internal turntable 177, only the rotation of the gear ring 18 needs to be controlled to simultaneously control the rotation of the three gear rings 1710 and the turntable 177, thereby realizing the opening and closing of the feed barrel 171 and the simultaneous opening for feeding, which is convenient to use.

[0052] The present invention also discloses a continuous processing technology for multi-layer co-extruded high-barrier IBC container barrels, which is characterized by comprising the following steps:

[0053] S1. First, the granular materials from different layers of the multi-layer co-extruded high-barrier IBC container are extracted by a fan and discharged into different screw extruders 11. The drive motor 16 is started to drive the central gear 14 to rotate, and the meshing external gear 13 drives the three screw extruders 11 to work simultaneously to heat, melt and extrude the raw materials.

[0054] S2, the material is extruded into the forming mechanism 2 through the extrusion mechanism 1, and the materials extruded by the three groups of screw extruders 11 are respectively injected into the inner core 22, the inner forming cylinder 23, the middle forming cylinder 24 and the heat-insulating outer shell 21 through the first injection pipe 214, the second injection pipe 215 and the third injection pipe 216, and are respectively formed into three-layer film sleeves by using the gaps. At the same time, the air discharged into the forming mold 3 is discharged into the electric heating cylinder 291 through the air guide pipe 294 for heating, and the hot air is respectively injected into the inner core 22 and the ring tube 26 through the main inflation pipe 292 and the auxiliary inflation pipe 293. The hot air entering the inner core 22 is ejected outward from the air channel 27 between the inner core 22 and the bottom of the inner forming cylinder 23, and the hot air entering the ring tube 26 is ejected inward from its side air channel 27, prompting the film sleeves on both sides to move closer to the middle and fit together. At the same time, under the pressure of the air, the air between the film sleeves is pressed into the inner forming cylinder 23 and the middle forming cylinder 24, and finally discharged from the exhaust pipe 210;

[0055] S3. The discharged multi-layer plastic film sleeve is discharged into the opened forming mold 3. The driving structure of the forming mold 3 is started to drive it to close. After the multi-layer plastic film sleeve is clamped, the top is cut off and then the film is blown. During this process, the cold air that has been refrigerated in advance and circulated between the outer cover 31 and the heat-conducting liner 32 cools the plastic film sleeve. Finally, the forming mold 3 is opened to take out the IBC container.

[0056] At the same time, the contents not described in detail in this specification belong to the existing technology known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used.

[0057] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0058] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A continuous processing equipment for multi-layer co-extruded high-barrier IBC container drums, comprising an extrusion mechanism and a molding mechanism connected to its bottom output end, wherein a molding die is provided below the molding mechanism, characterized in that: The molding mechanism includes a heat-insulating outer shell and an inner core, an inner molding cylinder and a middle molding cylinder arranged in sequence from the inside to the outside. Extrusion molding channels with equal spacing are formed between the inner core, the inner molding cylinder, the middle molding cylinder and the lower half of the heat-insulating outer shell. The bottom of the inner cavity of the inner core is fixedly connected to an air guide cylinder, and an annular tube is provided at the bottom of the outer side of the heat-insulating shell, and air ducts for blowing air obliquely downward are provided on the inner side of the annular tube and between the inner core and the bottom of the air guide cylinder, and an air inlet is provided on the side of the air guide cylinder, and an inflation heating structure is fixedly connected to the outside of the heat-insulating shell, and the air outlet end of the inflation heating structure is respectively connected to the annular tube and the inner core and filled with hot air, the side walls of the inner forming cylinder and the middle forming cylinder are hollow, and one side top of the inner forming cylinder and the middle forming cylinder are jointly fixedly connected to an exhaust pipe that runs through the outside of the heat-insulating shell, and the outer end of the exhaust pipe is threadedly connected to an end cap, and the end face of the end cap is fixedly connected to a cross valve; The forming molds are arranged in pairs and include an outer cover and a heat-conducting lining arranged therein. A heat dissipation channel with uniform spacing is formed between the outer cover and the heat-conducting lining. The bottom of the outer cover is connected to an input pipe. The bottom of the electric heating tube is connected to two air guide pipes through a tee. The bottom ends of the two air guide pipes are respectively connected to the top of the heat dissipation channel of the two forming molds. The inflation heating structure includes an electric heating tube fixedly connected to the side of the insulation shell through a bracket. The top of the electric heating tube is connected to a main inflation tube that runs through the inner core, and an auxiliary inflation tube is connected between the bottom of the main inflation tube and the top of the ring tube.

2. The continuous processing equipment for multi-layer co-extruded high-barrier IBC container barrels according to claim 1 is characterized by: The top center of the inner forming cylinder penetrates upward to the top of the heat-insulating outer shell, and the top of the inner forming cylinder is threadedly connected to the first injection pipe through a threaded sleeve. The top of the heat-insulating outer shell is fixedly connected to the second injection pipe and the third injection pipe in a triangular distribution with respect to the top of the first injection pipe. The bottom ends of the second injection pipe and the third injection pipe are respectively connected to the heat-insulating outer shell and the inner cavity of the middle forming cylinder.

3. The continuous processing equipment for multi-layer co-extruded high-barrier IBC container barrels according to claim 1 is characterized by: The extrusion mechanism includes a triangularly distributed screw extruder, and the outside of the screw extruder is fixedly mounted by a fixed sleeve. The top ends of the three screw extruders are fixedly connected to external gears, and a central gear is meshed between the three external gears. The top of the screw extruder is fixedly connected to a protective cover covering the external gears and the central gear, and the top of the protective cover is fixedly connected to a drive motor that drives the central gear to rotate.

4. The continuous processing equipment for multi-layer co-extruded high-barrier IBC container barrels according to claim 3 is characterized by: The top ends of the sides of the three screw extruders are all provided with raw material adding structures. The three groups of raw material adding structures respectively extract different raw materials and discharge them into the three screw extruders through external fans. The raw material adding structure includes a feed barrel fixedly connected to the top end of the side of the screw extruder. One side of the feed barrel is connected to an elbow, and the top of the corner part of the elbow is higher than the end connected to the feed barrel. The bottom end of the elbow is fixedly connected to a feed hose, the outside of the elbow corner is connected to an air outlet pipe, and the outside of the air outlet pipe is threadedly connected to a screw cover, and the end of the screw cover and the inner side of the elbow corner are fixedly connected to a filter screen. The inside and outside of the feed barrel are jointly provided with an opening and closing structure for controlling the opening and closing of the feed barrel.

5. The continuous processing equipment for multi-layer co-extruded high-barrier IBC container barrels according to claim 4 is characterized by: The opening and closing structure includes a turntable rotatably connected to the inside of the feed barrel, and an inner semicircular hole is provided inside the turntable, and an outer semicircular hole is provided on the side of the feed barrel and on the inner side of the elbow. By controlling the rotation of the turntable to control the overlap between the inner semicircular hole and the outer semicircular hole, the conduction amount of the feed barrel can be controlled. The external rotating sleeve of the feed barrel is provided with a gear ring, and the inner side of the gear ring is fixedly connected to a connecting rod that passes through the feed barrel and connected to the turntable. The side of the feed barrel is provided with a limiting slide groove that limits the connecting rod to rotate 90°.

6. The continuous processing equipment for multi-layer co-extruded high-barrier IBC container barrels according to claim 5, characterized in that: The three screw extruders are provided with a gear ring on the outside of the common rotating sleeve. The gear ring is located above the upper fixed sleeve and between the gear ring and is meshed with the gear ring. A servo motor is fixedly connected to one side of the screw extruder and located above the gear ring through a bracket. The output end of the servo motor is fixedly connected to a driving gear that is meshed with the gear ring.

7. A continuous processing process for multi-layer co-extruded high-barrier IBC container barrels, implemented based on the continuous processing equipment for multi-layer co-extruded high-barrier IBC container barrels according to claim 1, characterized in that: The specific steps include: S1. First, the materials of different layers of the multi-layer co-extruded high barrier IBC container are respectively discharged into different extrusion mechanisms for heating, melting and extrusion; S2. The material is extruded into a forming mechanism through an extrusion mechanism to be formed into an annular film bag and then output downward. At the same time, hot air is blown from both sides of the forming mechanism toward the middle to facilitate the adhesion of the multiple layers of plastic film and squeeze out the air between the multiple layers of plastic film and discharge it upward. S3. The discharged multi-layer plastic film is discharged into the opened forming mold, and the driving structure of the forming mold is started to drive it to close. After the multi-layer plastic film is clamped, the top is cut off, and then the film is blown and formed. Finally, the forming mold is opened to take out the IBC container.

8. The continuous processing technology of a multi-layer co-extruded high-barrier IBC container barrel according to claim 7 is characterized by: The hot air in S2 is obtained by absorbing heat from the cold air flowing through the forming mold and then being heated. To ensure the cooling effect, the cold air discharged into the forming mold is first cooled.

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