Flame-retardant plastic for steel coil packaging and processing device and processing technology thereof

Abstract

The present application relates to the field of packaging plastics, and specifically discloses a flame-retardant plastic for steel coil packaging and its processing device and processing technology, which includes an inner layer, an outer layer and an intermediate layer; the inner layer is formed with a plurality of recessed parts for accommodating part of the intermediate layer and a connecting part for connecting a plurality of the recessed parts to form the inner layer; a filling gap for accommodating the intermediate layer is formed between the inner layer and the outer layer; wherein the inner layer and the outer layer are both made of wear-resistant plastic materials; the intermediate layer is made of flame-retardant material; the projection area of ​​the recessed part on the inner layer or the outer layer is larger than the projection area of ​​the connecting part on the inner layer or the outer layer. The present application has the functions of protecting the intermediate layer, preventing the intermediate layer from being worn, and improving the flame-retardant effect.

Description

Technical Field

[0001] The present application relates to the field of packaging plastics, and in particular to a flame-retardant plastic for steel coil packaging and a processing device and a processing technology thereof. Background Art

[0002] The plastic used for steel coil packaging is mainly wear-resistant plastic. Wear-resistant plastic is made into plastic film to wrap the steel coil to reduce the wear and tear of the steel coil during transportation.

[0003] However, when the steel coils are transported, friction will occur between the wear-resistant plastic and the steel coils, as well as between the wear-resistant plastic and the transport carrier. The frictional heat will cause the temperature of the wear-resistant plastic to rise. If it is transported in hot weather, the wear-resistant plastic will easily melt or deform at high temperature and catch fire at high temperature, ultimately affecting the safety of steel coil transportation. Summary of the invention

[0004] In order to improve the existing problems in the transportation safety of steel coils, the present application provides a flame-retardant plastic for steel coil packaging and a processing device and a processing technology thereof.

[0005] The present application provides a flame-retardant plastic for steel coil packaging and a processing device and a processing technology thereof, which adopt the following technical solutions:

[0006] A flame-retardant plastic for steel coil packaging, characterized in that it comprises: an inner layer, an outer layer and an intermediate layer; a plurality of recessed portions for accommodating part of the intermediate layer and a connecting portion for connecting the plurality of recessed portions to form the inner layer are formed on the inner layer; a filling gap for accommodating the intermediate layer is formed between the inner layer and the outer layer; wherein the inner layer and the outer layer are both made of wear-resistant plastic materials; the intermediate layer is made of flame-retardant material; and the projection area of ​​the recessed portion on the inner layer or the outer layer is larger than the projection area of ​​the connecting portion on the inner layer or the outer layer.

[0007] By adopting the above technical solution, the flame retardant material used in the middle layer can make the entire packaging plastic have a flame retardant effect. The wear-resistant plastic material used in the inner and outer layers is to protect the middle layer and prevent the middle layer from being worn and causing the flame retardant effect to deteriorate.

[0008] By adopting the above technical solution, the recessed part used to accommodate the middle layer is set on the inner layer to increase the amount of the middle layer, thereby increasing the flame retardant effect. At the same time, the setting of the recessed part can also increase the contact area between the middle layer and the inner layer, thereby better ensuring the fixing effect between the inner layer and the middle layer, thereby better preventing the problem that the inner layer is easy to fall off relative to the middle layer before packaging, thereby greatly improving the overall stability of the packaging plastic after packaging the steel coil, thereby improving the flame retardant effect and the packaging and wrapping effect. The setting of the projection area of ​​the recessed part and the connecting part is to ensure the number and occupied space of the recessed part on the inner layer, thereby further improving the fixing effect between the inner layer and the middle layer, and ultimately to ensure the flame retardant effect.

[0009] Preferably, the wear-resistant plastic material is composed of glyceryl stearate, polyethylene, polytetrafluoroethylene, quartz, polysiloxane, natural rubber, carbon fiber, mineral oil, ethylene glycol, graphite and polymer carbamate; the flame retardant material includes aerogel particles and flame retardant glue; the flame retardant glue is used to form a protective layer that wraps the aerogel particles in the filling gap.

[0010] By adopting the above technical solution, the purpose of stearic acid glyceryl is to prevent problems caused by static electricity during production and use, and to reduce the adsorption of dust. The purpose of carbon fiber is to improve the strength of plastics and the corrosion resistance of plastics. The purpose of graphite is to further improve the wear resistance and antistatic properties of plastics. Aerogel particles have a flame retardant effect, and the flame retardant glue is not only used to solidify the aerogel together, but also has an additional flame retardant effect. The flame retardant glue is also used to bond and fix the middle layer to the inner and outer layers, and at the same time cooperate with the recessed part to increase the adhesion area of ​​the flame retardant glue, thereby not only increasing the flame retardant effect but also increasing the stability of the entire packaging plastic.

[0011] Preferably, the thickness of the inner layer and the outer layer are uniform and matched; the thickness of the filling gap matches the thickness of the inner layer or the outer layer.

[0012] By adopting the above technical solution, since the thickness of the inner layer and the outer layer is uniform, and since a recessed portion is formed on the inner layer, a plurality of convex points protruding outward will be relatively formed at the end of the inner layer away from the outer layer. The convex points are on the inner layer, so that the convex points will contact the steel coil to be packaged, which can increase the friction between the steel coil and the inner layer, thereby reducing the mutual friction between the inner layer and the steel coil caused by transportation, thereby better ensuring that the inner layer is not worn, better preventing the middle layer from being worn inside and falling off, avoiding affecting the flame retardant effect, and thus improving the flame retardant effect.

[0013] A flame retardant plastic processing technology for steel coil packaging, comprising: preparing a first plastic film for preparing or forming the outer layer and a second plastic film for preparing or forming the inner layer, the thickness of the second plastic film being greater than that of the first plastic film; pressing the second plastic film in an environment of 80-150°C to form the recessed portion; passing the second plastic film with the recessed portion through a storage chamber containing aerogel particles so that the aerogel particles are filled in the recessed portion and passing a control chamber with a control surface so that the aerogel forms a layer of aerogel particles with a thickness matching the filling gap above the second plastic film; filling the recessed portion and the filling gap with flame retardant glue to consolidate the aerogel particles and bond them to the inner layer; laminating the outer layer with the aerogel particles so that the outer layer, the aerogel particles, the flame retardant glue and the inner layer form the flame retardant plastic.

[0014] By adopting the above technical solution, the second plastic film is pressed in an environment of 80-150°C to obtain a recessed portion, while preventing the second plastic film from being damaged at a suitable temperature. Through the design of the second plastic film in the accommodating chamber, the aerogel particles can be automatically filled into the recessed portion, so that the multiple recessed portions on the second plastic film can be quickly filled with aerogel particles, thereby increasing the speed of filling the aerogel particles. At the same time, the setting of the limiting surface can also control the amount of aerogel particles filled, and the aerogel particles can be quickly filled into the recessed portions and the filling gaps, greatly improving the production speed, production quality and efficiency of the process.

[0015] Preferably, the projection of the recessed portion on the inner layer or the outer layer is circular, and the projection of the outer contour of the connecting portion on the inner layer or the outer layer is square; a plurality of the connecting portions are connected; and the second plastic film is press-formed in an environment of 80-150°C to form the recessed portion, comprising: fixing the outer contour of the connecting portion, and then sequentially forming a plurality of recessed cavities with gradually decreasing cross-sections on the second plastic film through press-forming surfaces with gradually decreasing sizes, wherein the plurality of recessed cavities constitute the recessed portion.

[0016] By adopting the above technical solution, the plurality of connecting parts are connected so as to arrange the plurality of recessed parts evenly on the second plastic film. In addition, the outer contour of the connecting part is positioned to prevent the second plastic film from being subjected to a large force as a whole and causing obvious tensile deformation when the second plastic film is pressed. By positioning the outer contour of the connecting part, the second plastic film can be divided into a plurality of independent force-bearing individuals, thereby avoiding tensile deformation of the second plastic film as a whole, better ensuring the shape of the second plastic film itself, and better ensuring the strength of the second plastic film, and avoiding the problem of deterioration of the strength of the second plastic film after tensile deformation. In addition, the second plastic film is pressed by a pressing surface with a gradually decreasing size, with the purpose of first pressing the second plastic film with a large pressing surface, so that the second plastic film at the connecting portion is mainly deformed, and then the pressing surface size is reduced, which will cause another part of the second plastic film to be deformed, and the pressing surface size is reduced again, and the above steps are repeated, so that the second plastic film will eventually be deformed uniformly, thereby ensuring that the thickness of the second plastic film is uniform after the recessed portion is formed on the second plastic film. If the pressing surface with a gradually decreasing size is not provided, the second plastic film will be deformed irregularly when being pressed, resulting in uneven thickness of the second plastic film, and some parts of the recessed portion will be thicker and some parts will be thinner, which will eventually make the second plastic film easy to damage.

[0017] Preferably, passing a second plastic film having a recessed portion through a storage chamber containing aerogel particles so that the aerogel particles are filled in the recessed portion and the filling gap comprises: adding aerogel particles into a storage chamber, wherein the height of the aerogel particles is a preset height; moving the second plastic film to a position below the preset height of the aerogel particles by driving an external force, wherein the second plastic film is close to the bottom surface of the storage chamber; and increasing or decreasing the size of the recessed portion by changing the height of the bottom surface of the storage chamber.

[0018] By adopting the above technical solution, the recessed part of the second plastic film is completely immersed in the aerogel particles by setting a preset height, so that the aerogel particles can be stably added to the recessed part. The change in the position between the second plastic film and the floor of the storage chamber can make the size of the aerogel particles that the recessed part can accommodate larger or smaller. In practical applications, the size of the recessed part can be gradually increased during the process of passing through the storage chamber. When the second plastic film moves in the storage chamber, the resistance of the recessed part to the aerogel particles gradually increases. The length of the storage chamber is limited, so some of the recessed parts will be subject to very small resistance in the aerogel particles, and some will be subject to greater resistance, thereby uniformly reducing the resistance of the second plastic film passing through the storage chamber, and also uniformly reducing the driving pulling force applied to the second plastic film. During the transportation of the second plastic film, the quality of the second plastic film is better guaranteed to avoid tensile deformation, thereby improving the overall quality of the packaging plastic.

[0019] A flame-retardant plastic processing device for steel coil packaging comprises: a film production machine for preparing a first plastic film and a second plastic film; the thickness of the second plastic film is greater than that of the first plastic film; a pressing device for forming a pressing surface at 80-150°C to press the second plastic film to form a concave portion; a storage box for forming a accommodating chamber for accommodating aerogel particles, and an inlet and an outlet for the second plastic film to pass through, so that the second plastic film passes through the accommodating chamber and the aerogel particles are filled in the concave portion and the filling gap; a glue injection device for filling the concave portion and the filling gap with flame-retardant glue to consolidate the aerogel particles and bond them to the inner layer; an extrusion device for attaching the outer layer to the aerogel particles and applying pressure to the outer layer and the inner layer to compact the outer layer, the aerogel particles, the flame-retardant glue and the inner layer to form the flame-retardant plastic.

[0020] Preferably, the projection of the recessed portion on the inner layer or the outer layer is circular, and the projection of the outer contour of the connecting portion on the inner layer or the outer layer is square; and a plurality of the connecting portions are connected.

[0021] Preferably, the profiling device comprises: a clamping member and a pressing member; the clamping member is used to form a clamping surface that is pressed against and fixes the outer contour of the connecting part; the pressing member is used to form a profiling surface with gradually decreasing size, so that a plurality of recessed cavities with gradually decreasing cross-sections are formed on the second plastic film, and the plurality of recessed cavities constitute the recessed part.

[0022] Preferably, the pressing member comprises: a driving structure, a plurality of ring portions and a pressing portion; the plurality of ring portions and a circular portion are mutually socketed to form a circular pressing surface; the driving structure is used to drive the plurality of ring portions and the pressing portion to move simultaneously or the plurality of ring portions and the pressing portion to move partially, so as to form a plurality of recessed chambers with gradually smaller cross-sections on the second plastic film.

[0023] By adopting the above technical solution, the driving structure is used to drive the multiple ring parts and one pressing part to move simultaneously or the multiple ring parts and one pressing part to move partially, so that all the ring parts and the pressing part can be moved and contact with the second plastic film. The ring parts and the pressing part have a temperature of 80-150°C, so the second plastic film can be pressed. At this time, all the ring parts and the pressing part are moved a part of the distance, and then the largest ring part stops moving, and the other ring parts and the pressing parts continue to move. At this time, the size of the pressing surface becomes smaller, so as to repeat the above steps to achieve the gradual reduction of the pressing surface.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. The flame retardant material used in the middle layer and the wear-resistant plastic material used in the inner and outer layers protect the middle layer, prevent the middle layer from being worn, and improve the flame retardant effect;

[0026] 2. By providing a recessed portion on the inner layer for accommodating the middle layer, the amount of the middle layer is increased, and the contact area between the middle layer and the inner layer is increased, thereby better ensuring the fixing effect between the inner layer and the middle layer and the flame retardant effect;

[0027] 3. By pressing the inner layer with a pressing surface of gradually decreasing size to form a recessed portion, the thickness of the inner layer after the recessed portion is formed can be better ensured to be uniform, thereby ensuring the quality of the flame retardant plastic and the flame retardant effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the layer structure of the plastic film for packaging according to the present application;

[0029] Figure 2 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the connecting portion and the recessed portion on the second plastic film;

[0030] Figure 3 It is a structural schematic diagram of a part of the embodiment, mainly showing a flow chart structure of the process;

[0031] Figure 4 It is a structural schematic diagram of a part of the embodiment, mainly showing the overall structure of the processing device;

[0032] Figure 5 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the pressing device;

[0033] Figure 6 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the moving plate and the mounting housing;

[0034] Figure 7 It is a structural schematic diagram of a part of the embodiment, mainly showing a cross-sectional schematic diagram of the driving structure;

[0035] Figure 8 It is a structural schematic diagram of a part of the embodiment, mainly showing the cross-sectional structure of the mounting housing and the third ring portion;

[0036] Fig. 9 It is a structural schematic diagram of a part of the embodiment, mainly showing the cross-sectional structure of the pressing portion, the first ring portion, the second ring portion and the third ring portion;

[0037] Fig.10 It is a structural diagram of a part of the embodiment, mainly showing Fig. 9 The structure of the explosion;

[0038] Fig.11 It is a schematic structural diagram of a part of the embodiment, mainly showing the structure of the flexible membrane and some surrounding parts.

[0039] Reference numerals:

[0040] 1. Inner layer; 11. Concave portion; 12. Connecting portion; 2. Outer layer; 3. Intermediate layer; 4. Pressing device; 41. Lifting member; 42. Mounting shell; 43. Tightening member; 44. Pressing member; 45. Driving structure; 451. Moving plate; 452. Hydraulic cylinder; 453. Connecting rod; 454. Connecting plate; 455. First spring; 456. Second spring; 457. Third spring; 458. First limiting plate; 459. Second limiting plate; 450. Third limiting plate; 46. Pressing portion; 47. First ring portion; 471. First card surface; 48. Second ring portion; 481. Second card surface; 49. Third ring portion; 491. Third clamping surface; 492. First contact plate; 493. Slide groove; 494. Second contact plate; 40. Thermal conductive film; 5. Storage box; 6. Glue injection device; 7. Extrusion device; 8. First plastic film; 81. Second plastic film; 9. Guide roller; 91. Pressing area; 92. Filling area; 93. Glue injection area; 94. Adhesion area; 95. Fixing frame. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-11 This application is described in further detail.

[0042] The embodiments of the present application disclose a flame-retardant plastic for steel coil packaging and a processing device and a processing technology thereof.

[0043] Example 1

[0044] See attached Figure 1-2 ,

[0045] A flame-retardant plastic for steel coil packaging includes: an inner layer 1, an outer layer 2 and an intermediate layer 3. The inner layer 1 is formed with a plurality of recessed portions 11 for accommodating part of the intermediate layer 3 and a connecting portion 12 for connecting the plurality of recessed portions 11 to form the inner layer 1. The plurality of connecting portions 12 are all square, and the plurality of connecting portions 12 together form the inner layer 1. The recessed portion 11 is circular, and the recessed portion 11 is located in the middle of the connecting portion 12. A groove is formed on the surface opposite to the recessed portion 11 and the outer layer 2, and the groove is used to accommodate part of the intermediate layer 3. A filling gap for accommodating the intermediate layer 3 is formed between the inner layer 1 and the outer layer 2, and the filling gap refers to the gap generated by the inner layer 1 and the outer layer 2. The inner layer 1 and the outer layer 2 are both wear-resistant plastic materials, and the intermediate layer 3 is a flame-retardant material. The flame-retardant material used in the intermediate layer 3 can make the entire packaging plastic have a flame-retardant effect. The wear-resistant plastic material used in the inner layer 1 and the outer layer 2 is to protect the intermediate layer 3 and prevent the intermediate layer 3 from being worn, which leads to a deterioration of the flame-retardant effect. The flame retardant effect of the packaging plastic is improved. The projection area of ​​the recessed portion 11 on the inner layer 1 or the outer layer 2 is larger than the projection area of ​​the connecting portion 12 on the inner layer 1 or the outer layer 2.

[0046] By adopting the above technical solution, the recessed portion 11 for accommodating the middle layer 3 is provided on the inner layer 1 to increase the amount of the middle layer 3, thereby increasing the flame retardant effect. At the same time, the provision of the recessed portion 11 can also increase the contact area between the middle layer 3 and the inner layer 1, thereby better ensuring the fixing effect between the inner layer 1 and the middle layer 3, thereby better preventing the problem that the inner layer 1 is easy to fall off relative to the middle layer 3 before packaging, thereby greatly improving the overall stability of the packaging plastic after packaging the steel coil, thereby improving the flame retardant effect and the packaging and wrapping effect. The provision of the projection area of ​​the recessed portion 11 and the connecting portion 12 is to ensure the number and occupied space of the recessed portion 11 on the inner layer 1, thereby further improving the fixing effect between the inner layer 1 and the middle layer 3, and ultimately also to ensure the flame retardant effect.

[0047] Specifically, the wear-resistant plastic material is composed of stearic acid glyceryl, polyethylene, polytetrafluoroethylene, quartz, polysiloxane, natural rubber, carbon fiber, mineral oil, ethylene glycol, graphite and polymer carbamate. The flame retardant material includes aerogel particles and flame retardant glue. The flame retardant glue is formed by high temperature and high pressure polymerization of inorganic raw materials such as aluminum phosphate, magnesium silicate, sodium silicate, fire retardant, inorganic polymer polymerizer, etc. The aerogel particles are 30-50nm particles, mainly powder. Specifically, the aerogel particles are first filled in the accommodating gap and the recessed portion 11, and then the flame retardant glue is injected for bonding. In some cases, due to the small size of the aerogel particles, larger-sized aerogel particles can also be used so that the flame retardant glue can better penetrate into the gaps of the flame retardant particles to bond the flame retardant particles. The flame retardant glue is used to form a protective layer that wraps the aerogel particles in the filling gap. The purpose of stearic acid glyceryl is to prevent problems caused by static electricity during production and use, and to reduce the adsorption of dust. The purpose of carbon fiber is to improve the strength of plastic and its corrosion resistance. The purpose of graphite is to further improve the wear resistance and antistatic properties of plastic. Aerogel particles have a flame retardant effect, and the flame retardant glue is not only used to solidify the aerogel together, but also has an additional flame retardant effect. The flame retardant glue is also used to bond the middle layer 3 to the inner layer 1 and the outer layer 2, and at the same time, the cooperation with the recessed part 11 increases the adhesion area of ​​the flame retardant glue, thereby not only increasing the flame retardant effect but also increasing the stability of the entire packaging plastic.

[0048] Specifically, the thickness of the inner layer 1 and the outer layer 2 are uniform and matched; the thickness of the filling gap matches the thickness of the inner layer 1 or the outer layer 2. Since the thickness of the inner layer 1 and the outer layer 2 are uniform, and since the recessed portion 11 is formed on the inner layer 1, a plurality of convex points protruding outward will be formed relatively at the end of the inner layer 1 away from the outer layer 2. The convex points are on the inner layer 1, so that the convex points will contact the steel coil to be packaged, which can increase the friction between the steel coil and the inner layer 1, thereby reducing the mutual friction between the inner layer 1 and the steel coil caused by transportation, thereby better ensuring that the inner layer 1 is not worn, and better preventing the middle layer 3 from being worn inside and falling off, avoiding affecting the flame retardant effect, thereby improving the flame retardant effect.

[0049] Example 2

[0050] See attached Figure 1-3 ,

[0051] A flame retardant plastic processing technology for steel coil packaging includes: preparing a first plastic film for preparing or forming an outer layer 2 and a second plastic film for preparing or forming an inner layer 1, wherein the thickness of the second plastic film 81 is greater than that of the first plastic film 8. The second plastic film 81 is pressed in an environment of 80-150°C to form a recessed portion 11. The second plastic film 81 having the recessed portion 11 is passed through a storage chamber containing aerogel particles, so that the aerogel particles are filled in the recessed portion 11, and the aerogel is formed above the second plastic film 81 through a control chamber with a control surface to form a layer of aerogel particles with a thickness matching the filling gap. Flame retardant glue is filled into the recessed portion 11 and the filling gap, and the aerogel particles are consolidated and bonded to the inner layer 1. The outer layer 2 is bonded to the aerogel particles, and the outer layer 2, the aerogel particles, the flame retardant glue and the inner layer 1 form a flame retardant plastic.

[0052] By adopting the above technical solution, the second plastic film 81 is pressed in an environment of 80-150°C to obtain the recessed portion 11, while preventing the second plastic film 81 from being damaged at a suitable temperature. Through the design of the second plastic film 81 in the accommodating chamber, the aerogel particles can be automatically filled into the recessed portion 11, so that the multiple recessed portions 11 on the second plastic film 81 can be quickly filled with aerogel particles, thereby increasing the speed of filling aerogel particles. At the same time, the setting of the limiting surface can also control the amount of aerogel particles filled, and the aerogel particles can be quickly filled into the recessed portion 11 and the filling gap, greatly improving the production speed, production quality and efficiency of the process.

[0053] Specifically, the projection of the recessed portion 11 on the inner layer 1 or the outer layer 2 is circular, and the projection of the outer contour of the connecting portion 12 on the inner layer 1 or the outer layer 2 is square. A plurality of connecting portions 12 are connected together, so that the plurality of connecting portions 12 form the second plastic film 81. Pressing the second plastic film 81 in an environment of 80-150° C. to form the recessed portion 11 includes: fixing the outer contour of the connecting portion 12, and then sequentially forming a plurality of recessed cavities with gradually decreasing cross-sections on the second plastic film 81 through press-forming surfaces with gradually decreasing sizes, and the plurality of recessed cavities form the recessed portion 11. The purpose of connecting the multiple connecting parts 12 is to arrange the multiple recessed parts 11 evenly on the second plastic film 81. In addition, the outer contour positioning of the connecting parts 12 is to prevent the second plastic film 81 from being subjected to a large force as a whole and causing obvious tensile deformation when the second plastic film 81 is pressed. The outer contour positioning of the connecting parts 12 can divide the second plastic film 81 into multiple independent force-bearing individuals, thereby avoiding the overall tensile deformation of the second plastic film 81, better ensuring the shape of the second plastic film 81 itself, and better ensuring the strength of the second plastic film 81, avoiding the problem of the second plastic film 81's strength deteriorating after tensile deformation. In addition, the second plastic film 81 is pressed by a pressing surface with a gradually decreasing size. The purpose is to first press the second plastic film 81 with a large pressing surface, so that the second plastic film 81 at the connecting portion 12 is mainly deformed, and then the pressing surface size is reduced, which will cause another part of the second plastic film 81 to be deformed, and the pressing surface size is reduced again. The above steps are repeated, and finally the second plastic film 81 is deformed uniformly, so that it can be ensured that after the recessed portion 11 is formed on the second plastic film 81, the thickness of the second plastic film 81 is uniform. If the pressing surface with a gradually decreasing size is not provided, the second plastic film 81 will be irregularly deformed when being pressed, resulting in uneven thickness of the second plastic film 81, and some parts of the recessed portion 11 will be thicker and some parts will be thinner, which will eventually make the second plastic film 81 easy to damage.

[0054] Specifically, passing the second plastic film 81 having the recessed portion 11 through a storage chamber containing aerogel particles so that the aerogel particles are filled in the recessed portion 11 and in the filling gap includes: adding aerogel particles into a storage chamber, the height of the aerogel particles being a preset height; driving the second plastic film 81 to move to a position below the preset height of the aerogel particles by an external force, wherein the second plastic film 81 is close to the bottom surface of the storage chamber; and changing the height of the bottom surface of the storage chamber to enlarge or reduce the size of the recessed portion 11. The method for changing the height of the bottom surface of the storage chamber is to use a bottom plate to be set in the storage chamber, and use the bottom plate as the bottom surface of the storage chamber, and then use an electric push rod, a cylinder or a hydraulic cylinder 452 to drive the bottom plate to move, thereby changing the height of the bottom surface of the storage chamber.

[0055] Example 3

[0056] See attached Figure 1-2 , 4-11,

[0057] A flame retardant plastic processing device for steel coil packaging includes a film production machine, a pressing device 4, a storage box 5, a glue injection device 6 and an extrusion device 7.

[0058] The film production machine is used to prepare the first plastic film 8 and the second plastic film 81. The thickness of the second plastic film 81 is greater than that of the first plastic film 8. Since the inner layer 1 needs to be embossed to form a recessed portion 11, it is necessary to ensure that the thickness of the second plastic film 81 is greater than that of the first plastic film 8 in order to achieve uniform and equal thicknesses of the inner layer 1 and the outer layer 2. Two film production machines are provided, one of which is used to produce the first plastic film 8, and the other is used to produce the second plastic film 81. In addition, the flame-retardant plastic processing device for steel coil packaging includes a plurality of guide rollers 9, which are used to guide the first plastic film 8 and the second plastic, and the plurality of guide rollers 9 make the first plastic film 8 located above the second plastic film 81, and the plurality of guide rollers 9 guide the first plastic film 8 and the second plastic film 81 to form a profiling area 91, a filling area 92, a glue injection area 93 and a bonding area 94 on the conveying track of the first plastic film 8 and the second plastic film 81, the profiling area 91 is used to place the profiling device 4, the filling area 92 is used to place the storage box 5, the glue injection area 93 is used to place the glue injection device 6, and the bonding area 94 is used to place the extrusion device 7, in the profiling area 91, the filling area 92 and the glue injection area 93, the first plastic film 8 is located above the second plastic film 81, and in the bonding area 94, the first plastic film 8 and the second plastic film 81 are attached to each other.

[0059] The pressing device 4 is used to form a pressing surface at 80-150°C to press the second plastic film 81 to form a recessed portion 11. In this solution, the device uses a pressing block at 80-150°C, and uses electric heating to ensure the temperature of the pressing block. The shape of the pressing block matches the shape of the recessed portion 11. The storage box 5 is used to form a receiving chamber containing aerogel particles, as well as an inlet and an outlet for the second plastic film 81 to pass through, so that the second plastic film 81 passes through the receiving chamber and the aerogel particles are filled in the recessed portion 11 and the filling gap. The storage box 5 is a box body in this solution, and the second plastic film 81 enters the receiving chamber from the inlet and leaves the receiving chamber from the outlet. The glue injection device 6 fills the flame retardant glue into the recessed portion 11 and the filling gap to consolidate the aerogel particles and bond them to the inner layer 1. The glue injection device 6 uses a glue injection machine, which is mainly a device for squeezing glue outward. The extrusion device 7 includes a first pressing roller and a second pressing roller, a gap is formed between the first pressing roller and the second pressing roller, the first plastic film 8 and the second plastic film 81 both pass through the gap, and the first pressing roller and the second pressing roller squeeze the first plastic film 8 and the second plastic film 81 against each other, so that the outer layer 2 and the aerogel particles are attached and pressure is applied to the outer layer 2 and the inner layer 1 so that the outer layer 2, the aerogel particles, the flame retardant glue and the inner layer 1 are compacted and form a flame retardant plastic.

[0060] Specifically, the projection of the recessed portion 11 on the inner layer 1 or the outer layer 2 is circular, and the projection of the outer contour of the connecting portion 12 on the inner layer 1 or the outer layer 2 is square; a plurality of connecting portions 12 are connected.

[0061] In other embodiments, the profiling device 4 includes: a lifting member 41, a mounting shell 42, a pressing member 43 and a pressing member 44. The pressing member 43 is a square ring body, and the pressing member 43 is used to form a pressing surface that presses against the outer contour of the connecting portion 12 and fixes the outer contour of the connecting portion 12, and the pressing surface matches the outer contour of the connecting portion 12. The pressing member 43 is fixed to the mounting shell 42, and the lifting member 41 is used to drive the mounting shell 42 to rise and fall, so that the pressing member 43 can press the outer contour of the connecting portion 12 and the outer contour away from the connecting portion 12. The pressing member 44 is used to form a profiling surface with a gradually decreasing size, so that a plurality of concave chambers with gradually decreasing cross-sections are formed on the second plastic film 81, and the plurality of concave chambers constitute the concave portion 11. Specifically, the plurality of pressing members 43 are fixed relative to the mounting shell 42, so that the positions of the plurality of pressing members 43 are fixed at the same time, and when the lifting member 41 drives the lifting shell to rise and fall, the plurality of pressing members 43 can be driven to rise and fall at the same time.

[0062] Specifically, the pressing member 44 includes: a driving structure 45, a plurality of rings and a pressing portion 46. The plurality of rings and a circular portion are mutually connected to form a circular pressing surface. The clamping member 43 is a block with a circular groove in the middle, so the circular groove in the middle of the clamping member 43 forms an annular area, and the pressing member 44 is installed in the annular area. In a specific example. The specific number of the rings is three, and the sizes of the rings are defined from small to large as the first ring 47, the second ring 48 and the third ring 49. The driving structure 45 includes: a moving plate 451, a hydraulic cylinder 452, a connecting rod 453, a connecting plate 454, a first spring 455, a second spring 456, a third spring 457, a first limit plate 458, a second limit plate 459 and a third limit plate 450. In addition, the lower pressing member 44 also includes a fixing frame 95, and the lifting member 41 adopts one of a hydraulic cylinder 452, an electric push rod and a cylinder. The lifting member 41 is installed on the fixing frame 95, and the moving plate 451 is connected to the output end of the lifting member 41, so that the lifting member 41 drives the moving plate 451 and the mounting shell 42 to move up and down, and the moving up and down of the mounting shell 42 is the moving up and down of the pressing member 43. The hydraulic cylinder 452 is installed on the mounting shell 42, and the connecting plate 454 is connected to the output end of the hydraulic cylinder 452. The connecting plate 454 is fixed to the moving plate 451, so that the hydraulic cylinder 452 drives the moving plate 451 to move up and down, and the connecting rod 453, the connecting plate 454, the first spring 455, the second spring 456, the third spring 457, the first limit plate 458, the second limit plate 459 and the third limit plate 450 are all provided in plurality, and the plurality of connecting plates 454 are all fixed to the moving plate 451. The connecting rod 453 is fixed to the connecting plate 454, and the pressing part 46 is fixed to the connecting rod 453, so that the multiple pressing parts 46 will move synchronously with the upward and downward movement of the moving plate 451. One end of the first spring 455 is relatively fixed to the connecting plate 454, and the other end is fixed to the first ring part 47; one end of the second spring 456 is fixed to the first ring part 47, and the other end is fixed to the second ring part 48; one end of the third spring 457 is fixed to the second ring part 48, and the other end is fixed to the third ring part 49. Therefore, when the pressing part 46 moves downward, it will drive the first ring part 47, the second ring part 48 and the third ring part 49 to move downward together. In addition, a slide groove 493 is arranged on the mounting shell 42, a second contact plate 494 is installed on the slide groove 493, a first contact plate 492 is arranged on the third ring portion 49, and the first contact plate 492 is slidably connected to the slide groove 493, so that the second contact plate 494 limits the second contact plate 494 and the third ring portion 49, so that the third ring portion 49 stops moving after moving downward for a certain distance.Thus, the third ring portion 49 stops moving, and the pressing portion 46, the first ring portion 47, and the second ring portion 48 continue to move downward; then the second ring portion 48 abuts against the third limiting plate 450 to limit the second ring portion 48, so that the second ring portion 48 stops moving, and the pressing portion 46 and the first ring portion 47 continue to move downward; the first ring portion 47 abuts against the second limiting plate 459 to limit the first ring portion 47, so that the first ring portion 47 stops moving, and the pressing portion 46 continues to move downward. The pressing portion 46 moves downward, and then the first limiting plate 458 contacts the second limiting plate 459 to limit the pressing portion 46. Among them, the third limiting plate 450 is fixed to the second ring portion 48, the second limiting plate 459 is fixed to the first ring portion 47, the first limiting plate 458 is fixed to the connecting rod 453, and the connecting rod 453 is fixed to the pressing portion 46. The first ring portion 47 , the second ring portion 48 , the third ring portion 49 and the lower end surface of the pressing portion 46 form a press-profile surface, so that the press-profile surface can be formed to be enlarged and reduced.

[0063] In addition, a first latch surface 471 is formed on the first ring portion 47, a second latch surface 481 is formed on the second ring portion 48, and a third latch surface 491 is formed on the third ring portion 49. When the pressing portion 46 does not move downward, the first spring 455, the second spring 456 and the third spring 457 act downward on the first ring portion 47, the second ring portion 48 and the third ring portion 49, and then the first latch surface 471 cooperates with the pressing portion 46 to restrict the first ring portion 47 from moving downward, the second latch surface 481 cooperates with the first ring portion 47 to restrict the second ring portion 48 from moving downward; the third latch surface 491 cooperates with the second ring portion 48 to restrict the third ring portion 49 from moving downward, so that the lower end surfaces of the pressing portion 46, the first ring portion 47, the second ring portion 48 and the third ring portion 49 are coplanar and form a pressed surface.

[0064] In other schemes, a heat-conducting film 40 is arranged below the pressing part 46, the first ring part 47, the second ring part 48 and the third ring part 49. When the heat-conducting film 40 contacts the pressing part 46, the first ring part 47, the second ring part 48 and the third ring part 49, the heat-conducting film 40 is heated by heat conduction. Among them, the heat-conducting film 40 is an elastic film material. The heat-conducting film 40 is fixed to the pressing part 46, the first ring part 47, the second ring part 48 and the third ring part 49. When the third ring part 49 stops moving and the second ring part 48 moves downward relative to the third ring part 49, the heat-conducting film 40 forms a smooth guide plane between the second ring part 48 and the third ring part 49, thereby avoiding the edge corners of the second ring part 48 or the third ring part 49 causing the formation of an angular groove matching the edge corners on the recessed part 11, which is conducive to ensuring the uniform thickness of the inner layer 1. At the same time, when the second ring portion 48 stops moving and the first ring portion 47 moves downward relative to the second ring portion 48 , the thermally conductive film 40 plays the same role; when the first ring portion 47 stops moving and the pressing portion 46 moves downward relative to the first ring portion 47 , the thermally conductive film 40 plays the same role.

[0065] In some other solutions, the edge of the heat conductive film 40 is fixed to the edge of the third ring portion 49 , or the edge of the heat conductive film 40 is fixed to the mounting housing 42 of the edge of the third ring portion 49 .

[0066] In other schemes, the thermally conductive film 40 has a double-layer film structure, thereby forming a cavity in the thermally conductive film 40, and the cavity is used to store water. Then, when the thermally conductive film 40 is deformed, the water inside the thermally conductive film 40 will make the deformation of the thermally conductive film 40 smoother, thereby avoiding the formation of obvious angular grooves when the second plastic film 81 is pressed, thereby better ensuring the uniformity of the thickness of the entire inner layer 1.

[0067] By adopting the above technical solution, the driving structure 45 is used to drive multiple ring parts and one pressing part 46 to move simultaneously or multiple ring parts and one pressing part 46 to move partially, so that all the ring parts and the pressing part 46 can be moved and contact with the second plastic film 81. The ring parts and the pressing part 46 have a temperature of 80-150°C, so the second plastic film 81 can be pressed. At this time, all the ring parts and the pressing part 46 are moved a part of the distance, and then the largest ring part stops moving, and the other ring parts and the pressing part 46 continue to move. At this time, the size of the pressing surface becomes smaller, so as to repeat the above steps to achieve the gradual reduction of the pressing surface.

[0068] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A flame retardant plastic for steel coil packaging, characterized in that: It comprises an inner layer, an outer layer and an intermediate layer; the inner layer is formed with a plurality of recessed parts for accommodating a part of the intermediate layer and a connecting part for connecting a plurality of the recessed parts to form the inner layer; a filling gap for accommodating the intermediate layer is formed between the inner layer and the outer layer; Wherein, the inner layer and the outer layer are both made of wear-resistant plastic materials; the middle layer is made of flame-retardant material; the projection area of ​​the recessed portion on the inner layer or the outer layer is larger than the projection area of ​​the connecting portion on the inner layer or the outer layer; The concave portion will cause the end of the inner layer away from the outer layer to form a plurality of convex points protruding outwards.

2. The flame-retardant plastic for steel coil packaging according to claim 1, characterized in that: The wear-resistant plastic material is composed of glyceryl stearate, polyethylene, polytetrafluoroethylene, quartz, polysiloxane, natural rubber, carbon fiber, mineral oil, ethylene glycol, graphite and polymer urethane; The flame retardant material comprises aerogel particles and flame retardant glue; the flame retardant glue is used to form a protective layer wrapping the aerogel particles in the filling gap.

3. The flame-retardant plastic for steel coil packaging according to claim 1 or 2, characterized in that: The inner layer and the outer layer have uniform thickness.

4. A process for processing flame-retardant plastics for steel coil packaging, characterized in that: The flame-retardant plastic for steel coil packaging is the flame-retardant plastic for steel coil packaging according to any one of claims 1 to 3; Preparing a first plastic film for preparing or forming the outer layer and a second plastic film for preparing or forming the inner layer, wherein the thickness of the second plastic film is greater than that of the first plastic film; Pressing the second plastic film in an environment of 80-150° C. to form the recessed portion; Passing a second plastic film having a recessed portion through a storage chamber containing aerogel particles, so that the aerogel particles fill the recessed portion and passing through a control chamber having a control surface so that the aerogel forms a layer of aerogel particles above the second plastic film with a thickness matching the filling gap; Fill the concave portion and the filling gap with flame retardant glue to consolidate the aerogel particles and bond them to the inner layer; attach the outer layer to the aerogel particles and make the outer layer, the aerogel particles, the flame retardant glue and the inner layer form the flame retardant plastic.

5. The processing technology of flame-retardant plastic for steel coil packaging according to claim 4 is characterized in that: The projection of the recessed portion on the inner layer or the outer layer is circular, and the projection of the outer contour of the connecting portion on the inner layer or the outer layer is square; A plurality of the connecting parts are connected to each other; Pressing the second plastic film in an environment of 80-150°C to form the recessed portion includes: fixing the outer contour of the connecting portion, and then sequentially forming a plurality of recessed cavities with gradually decreasing cross-sections on the second plastic film through press-forming surfaces with gradually decreasing sizes, wherein the plurality of recessed cavities constitute the recessed portion.

6. The processing technology of flame-retardant plastic for steel coil packaging according to claim 5, characterized in that: Passing the second plastic film with the concave portion through a storage chamber containing aerogel particles so that the aerogel particles fill the concave portion and passing the aerogel through a control chamber with a control surface so that the aerogel forms a layer of aerogel particles above the second plastic film with a thickness matching the filling gap comprises: adding aerogel particles into a storage chamber, wherein the height of the aerogel particles in the storage chamber is a preset height; The second plastic film is moved to a position below a preset height of the aerogel particles by driving an external force, wherein the second plastic film is close to the bottom surface of the storage chamber; By changing the height of the bottom surface of the storage chamber, the size of the recessed portion is enlarged or reduced; The method for changing the height of the bottom surface of the storage chamber includes at least using a bottom plate to be set in the storage chamber and using the bottom plate as the bottom surface of the storage chamber, and then using an electric push rod, a cylinder or a hydraulic cylinder to drive the bottom plate to move, thereby changing the height of the bottom surface of the storage chamber.

7. A processing device for flame-retardant plastics for steel coil packaging, characterized in that: The flame-retardant plastic for steel coil packaging is the flame-retardant plastic for steel coil packaging according to any one of claims 1 to 3; The processing device comprises: A film production machine, used for preparing a first plastic film and a second plastic film; the thickness of the second plastic film is greater than the thickness of the first plastic film; A pressing device, used for pressing a pressing surface at 80-150°C to press the second plastic film to form a concave portion; A storage box, used to form a receiving chamber containing aerogel particles, and an inlet and an outlet for the second plastic film to pass through, so that the second plastic film passes through the receiving chamber and the aerogel particles are filled in the concave portion and the filling gap; A glue injection device, which fills the flame retardant glue into the recessed portion and the filling gap to consolidate the aerogel particles and bond them to the inner layer; An extrusion device is used to adhere the outer layer to the aerogel particles and to apply pressure to the outer layer and the inner layer so that the outer layer, the aerogel particles, the flame retardant adhesive and the inner layer are compacted to form the flame retardant plastic.

8. The processing device of flame-retardant plastic for steel coil packaging according to claim 7, characterized in that: The projection of the recessed portion on the inner layer or the outer layer is circular, and the projection of the outer contour of the connecting portion on the inner layer or the outer layer is square; a plurality of the connecting portions are connected.

9. The processing device of flame-retardant plastic for steel coil packaging according to claim 7, characterized in that: The pressing device comprises: a pressing member and a pressing member; The abutting member is used to form an abutting surface that abuts against the outer contour of the connecting portion and fixes the outer contour of the connecting portion; The pressing member is used to form a pressing surface with a gradually decreasing oversize, so that a plurality of concave cavities with gradually decreasing cross-sections are formed on the second plastic film, and the plurality of concave cavities constitute the concave portion.

10. The processing device of flame-retardant plastic for steel coil packaging according to claim 9, characterized in that: The lower pressing member comprises: a driving structure, a plurality of ring parts and a pressing part; the plurality of ring parts and the pressing part are sleeved with each other to form a circular pressing surface; The driving structure is used to drive the plurality of ring parts and one pressing part to move simultaneously or partially move the plurality of ring parts and one pressing part, so as to form a plurality of concave chambers with gradually decreasing cross sections on the second plastic film.

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