A laminating production device for environmentally friendly composite non-woven fabrics for thermal insulation bags

Abstract

The present invention discloses a coating production device for environmentally friendly composite non-woven fabrics for thermal insulation bags, comprising: an unwinding component; a coating production component, including a feeding device, a die head and a composite pair of rollers, the composite pair of rollers including a first clamping roller and a second clamping roller, the die head having two die openings, one of which outputs an adhesive layer to form a semi-finished composite film with the non-woven fabric and the thermal insulation film; a traction component, used to guide the transmission path of the semi-finished composite film so that its input end and output end are in opposite directions; a winding component. Compared with the prior art, the coating production device for environmentally friendly composite non-woven fabrics for thermal insulation bags of the present invention guides the transmission path of the semi-finished composite film through the traction component, so that it is folded back and then overlapped with the printed film and the adhesive layer to form a finished composite film, and the two coating positions are located in the same straight line, so only a single set of composite rollers is needed, and the die head is provided with two die openings, and only a single detection system is needed for detection, which reduces the number of components, reduces costs, and has a compact structure and reduces occupied space.

Description

Technical Field

[0001] The invention relates to the technical field of composite non-woven fabric lamination, in particular to a lamination production device for environmentally friendly composite non-woven fabric for insulation bags. Background Art

[0002] In the prior art, for example, the Chinese utility model patent with announcement number CN220900823U discloses a laminating device for environmentally friendly composite non-woven fabrics, which forms a PE inner layer and a PE outer layer by laminating between the non-woven fabric and the thermal insulation film and between the non-woven fabric and the printed film respectively through two laminating units, thereby ensuring the degradability of the composite non-woven fabric product, improving the thermal insulation performance by using the thermal insulation film, and achieving waterproofing with the printed film and improving the aesthetics and recognition of the composite non-woven fabric product, thereby improving the product quality of the composite non-woven fabric.

[0003] However, in the above device, the two laminating units are independent of each other and are arranged in sequence along the non-woven fabric transmission path, and the PE film is formed on both sides of the non-woven fabric in sequence, resulting in a large overall size of the laminating device, which occupies too much production space; moreover, in order to ensure the lamination quality of the PE film with the non-woven fabric, the printing film and the thermal insulation film, a composite roller pair is required to be arranged below the laminating device. Since the two laminating units are independent of each other, two sets of composite roller pairs are required to be arranged, and during the production process, the two sets of composite roller pairs need to be controlled to be close to each other to improve product quality. In this way, the number of composite roller pairs and related extrusion devices is increased, resulting in a complex device structure and an increase in the number of parts. Furthermore, the cost is increased; moreover, since the die heads of the two laminating units are independent of each other, in order to ensure the laminating molding quality of the PE film, in the actual production process, it is necessary to respectively set corresponding detection devices (such as temperature sensors to detect the melting temperature of the PE material inside the die head) at the positions of the two laminating units to respectively detect the operating conditions of the die heads, which further leads to increased production costs; in addition, the unwinding of non-woven fabrics, printed films and thermal insulation films is driven by three independent driving devices to drive the corresponding unwinding rollers to rotate for unwinding. During the production process, the output rates of the three are inconsistent, which easily leads to inconsistent degrees of stretching deformation of the three, ultimately affecting the actual product quality.

[0004] Therefore, it is necessary to improve the coating production device of the environmentally friendly composite non-woven fabric in the prior art. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects in the prior art and provide a coating production device for environmentally friendly composite non-woven fabrics for insulation bags, which reduces the occupied space, reduces the number of components, helps to reduce costs while ensuring product quality.

[0006] In order to achieve the above technical effects, the technical solution of the present invention is: a laminating production device for environmentally friendly composite non-woven fabric for insulation bags, comprising:

[0007] An unwinding assembly, the unwinding assembly comprising a driving unit and three unwinding units, the driving unit and the three unwinding units cooperate with each other to output the nonwoven fabric, the thermal insulation film and the printed film;

[0008] A laminating assembly, the laminating assembly comprising a feeding device, a die head and a composite pair of rollers, the composite pair of rollers comprising a first nip roller and a second nip roller whose axes are arranged side by side in the same horizontal plane and rotate around their own axes, a laminating gap extending in parallel to the axes of the first nip roller and the second nip roller is provided between the first nip roller and the second nip roller, the input end of the die head is connected to the feeding device, and the output end has two die openings located directly above the laminating gap, extending in parallel to the length direction of the laminating gap and outputting an adhesive layer downward, wherein the adhesive layer outputted from one of the die openings is used to be laminated and pressed between one side of the non-woven fabric and the thermal insulation film at the laminating gap to form a semi-finished composite film;

[0009] A traction assembly, the traction assembly is used to guide the transmission path of the semi-finished composite film so that the output end of the transmission path is located on one side of the input end and in the opposite direction, so that the adhesive layer output by another die is laminated and pressed between the side of the non-woven fabric in the semi-finished composite film facing away from the thermal insulation film and the printed film at the laminating gap to form a finished composite film;

[0010] The winding assembly is used for winding and collecting the finished composite film.

[0011] Preferably, in order to change the transmission path of the semi-finished composite film so that the transmission directions of its input end and output end are opposite, the traction assembly includes at least two traction rollers rotating around their own axis lines, and the axis lines of the traction rollers have an angle with the axis line of the first clamping roller.

[0012] Preferably, in order to reduce the number of parts and components, lower costs, reduce the degree of material tensile deformation, and ensure product quality while achieving a change in the transmission path of the semi-finished composite film, two traction rollers are provided; the included angle between the axis line of the two traction rollers and the axis line of the first clamping roller is 45°, and the axis lines of the two traction rollers are perpendicular to each other.

[0013] Preferably, in order to ensure that consistent lamination force is applied to the semi-finished composite film and the finished composite film and to ensure the quality of product molding, the laminating gap includes a first laminating section and a second laminating section which are connected in sequence along its own length direction, the second laminating section is located in the first laminating section, the non-woven fabric, the thermal insulation film and the adhesive layer output from one of the die openings are stacked and pressed in the first laminating section to form a semi-finished composite film, the semi-finished composite film, the printed film and the adhesive layer output from another die opening are stacked and pressed in the second laminating section to form a finished composite film, and the width of the first laminating section is smaller than the width of the second laminating section.

[0014] Preferably, in order to further ensure uniformity of the lamination force applied to the semi-finished composite film and the finished composite film, the difference in width between the first lamination section and the second lamination section is less than or equal to the sum of the thickness of the adhesive layer and the thickness of the printed film.

[0015] Preferably, in order to achieve a gap width of the first coating section that is larger than the gap width of the second coating section, the first clamping roller includes a first clamping section and a second clamping section that are connected along its own axial coaxial centerline and are both cylindrical, the second clamping roller is cylindrical, and the outer diameter of the first clamping section is larger than the outer diameter of the second clamping section.

[0016] Preferably, in order to ensure that a uniform lamination force is applied to the adhesive layer so that it is evenly distributed between one side of the non-woven fabric and the thermal insulation film and between the other side of the non-woven fabric and the printed film, the first clamping roller includes a cylindrical clamping roller body and two extrusion units distributed along the axial direction of the clamping roller body and corresponding to the two die openings, the two extrusion units include symmetrically distributed and elastic extrusion strips, and the extension trajectory of the extrusion strips is an equidistant spiral curve coaxial with the center line of the clamping roller body, so as to evenly laminate the adhesive layers output from the two die openings between the non-woven fabric and the thermal insulation film and between the semi-finished composite film and the printed film.

[0017] Preferably, in order to improve product quality, the three unwinding units each include an unwinding roller rotating around its own axis, and the driving unit drives the unwinding rollers of the three unwinding units to rotate at the same speed to synchronously output the non-woven fabric, thermal insulation film and printed film.

[0018] Preferably, in order to ensure that the output rates of the non-woven fabric, printed film and thermal insulation film are consistent, thereby improving product quality, two of the three unwinding rollers of the unwinding unit are detachably connected to the same axis and are transmission-connected to the other unwinding roller.

[0019] Preferably, in order to further ensure that the output rates of the non-woven fabric, the printed film and the thermal insulation film are consistent, tensioning components are provided between the three unwinding units and the laminating gaps to tension the non-woven fabric, the thermal insulation film and the printed film respectively.

[0020] To sum up, compared with the prior art, the coating production device for the environmentally friendly composite non-woven fabric for insulation bags of the present invention guides the transmission path of the semi-finished composite film through the traction component, so that it is folded back and then overlapped with the printed film and the adhesive layer to form a finished composite film. The two coating positions are located in the same straight line, so only a single set of composite rollers is required, and the die head is provided with two die openings, and only a single detection system is required for detection, which reduces the number of components, reduces costs, and has a compact structure and reduces occupied space. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1is a schematic structural diagram of the first embodiment;

[0022] Figure 2 is a schematic structural diagram of the first embodiment from another perspective;

[0023] Figure 3 yes Figure 1 A top view of

[0024] Figure 4 yes Figure 1 A front view of

[0025] Figure 5 is a schematic diagram of the structure of the first embodiment after the base is omitted;

[0026] Figure 6 yes Figure 5 The structural diagram of the unwinding component and the coating component is omitted;

[0027] Figure 7 yes Figure 6 Explosion diagram of

[0028] Figure 8 yes Figure 7 A magnified view of part A;

[0029] Fig. 9 1 is a schematic structural diagram of a feeding assembly and a composite pair of rollers in the first embodiment;

[0030] Fig.10 is a schematic structural diagram of a coating assembly according to the first embodiment;

[0031] Fig.11 yes Fig.10 Explosion diagram of

[0032] Fig.12 is a schematic structural diagram of an unwinding unit for providing nonwoven fabric in the first embodiment;

[0033] Fig.13 yes Fig.12 Explosion diagram of

[0034] Fig.14 is a schematic diagram of the connection structure of the remaining two unwinding units in the first embodiment;

[0035] Fig.15 yes Fig.14 Explosion diagram of

[0036] Fig.16 is a schematic structural diagram of a tensioning assembly according to a first embodiment;

[0037] Fig.17 2 is a schematic structural diagram of a composite pair of rollers according to a first embodiment;

[0038] Fig.18 yes Fig.17 Explosion diagram of

[0039] Fig.19 2 is a schematic structural diagram of a composite pair of rollers according to a second embodiment;

[0040] Fig. 20 yes Fig.19 A top view of

[0041] Fig.21 is a schematic structural diagram of the first clamping roller of the third embodiment;

[0042] In the figure: 1. Finished composite film; 11. Non-woven fabric; 12. Insulation film; 13. Printed film; 14. Adhesive layer; 15. Semi-finished composite film; 2. Driving unit; 21. Driving motor; 22. Driving bracket; 23. Driving sprocket; 24. Driven sprocket; 241. Concentric shaft; 242. First bearing; 25. Transmission chain; 3. Unwinding unit; 301. First unwinding unit; 302. Second unwinding unit; 303. Third unwinding unit; 31. Unwinding roller; 32. Unwinding frame; 33. Tensioning assembly; 331. Tensioning roller; 332. Tensioning frame; 333. Spring; 334. Sliding rod; 335. Sliding sleeve; 336. Tensioning bracket; 4. Feeding device; 41. Feeding frame; 42. Material barrel; 43. Screw conveyor; 44. Feeding motor; 45. Driving synchronous wheel; 46. Driven synchronous wheel; 47. Synchronous belt; 48. Shell; 49. Shell cover; 5. Die head; 51. Die mouth; 51 1. First die; 512. Second die; 6. Composite roller pair; 61. First clamping roller; 611. First clamping section; 612. Second clamping section; 613. Clamping roller body; 614. Extrusion strip; 615. Slider; 62. Second clamping roller; 621. Clamping roller frame; 63. Laminating gap; 631. First laminating section; 632. Second laminating section; 64. Pressing assembly; 641. Oil cylinder; 642. Fixing frame; 643. Pressing frame; 6431. Strip shaped opening; 644, pressure roller; 6441, second bearing; 645, sliding frame; 646, slide rail; 7, traction assembly; 71, traction roller; 72, traction frame; 8, winding assembly; 81, winding motor; 82, winding bracket; 83, winding roller; 84, winding frame; 9, base; 91, guide roller; 92, guide frame; 10, connecting assembly; 101, half tube; 102, bolt; 103, nut; 104, boss; 105, recessed hole. DETAILED DESCRIPTION

[0043] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0044] First embodiment

[0045] like Figure 1-Figure 18 As shown, a laminating production device for an environmentally friendly composite non-woven fabric for a heat preservation bag according to a first embodiment of the present invention comprises:

[0046] An unwinding assembly, the unwinding assembly comprises a driving unit 2 and three unwinding units 3, the driving unit 2 and the three unwinding units 3 cooperate with each other to output the nonwoven fabric 11, the thermal insulation film 12 and the printed film 13;

[0047] A laminating assembly, the laminating assembly comprises a feeding device 4, a die head 5 and a composite pair of rollers 6, the composite pair of rollers 6 comprises a first clamping roller 61 and a second clamping roller 62 whose axes are arranged side by side in the same horizontal plane and rotate around their own axes, a laminating gap 63 extending in parallel to the axes of the first clamping roller 61 and the second clamping roller 62 is provided between the first clamping roller 61 and the second clamping roller 62, the input end of the die head 5 is connected to the feeding device 4, and the output end has two die openings 51 located directly above the laminating gap 63, extending in parallel to the length direction of the laminating gap 63 and outputting the adhesive layer 14 downward, wherein the adhesive layer 14 outputted from one of the die openings 51 is used to be laminated and pressed between one side of the non-woven fabric 11 and the thermal insulation film 12 at the laminating gap 63 to form a semi-finished composite film 15;

[0048] The traction assembly 7 is used to guide the transmission path of the semi-finished composite film 15 so that the output end of the transmission path is located on the side of the input end and in the opposite direction, so that the adhesive layer 14 output by the other die 51 is laminated and pressed between the side of the non-woven fabric 11 in the semi-finished composite film 15 facing away from the thermal insulation film 12 and the printed film 13 at the laminating gap 63 to form a finished composite film 1;

[0049] A winding assembly 8, the winding assembly 8 is used to wind and collect the finished composite film 1;

[0050] The base 9 , the unwinding assembly, the laminating assembly, the traction assembly 7 and the winding assembly 8 are all arranged above the base 9 .

[0051] In this embodiment, the base 9 is a rectangular plate-shaped structure fixed on the ground. The base 9 is used to install an unwinding component, a coating component, a traction component 7 and a winding component 8. The unwinding component includes three unwinding units 3. For the convenience of explanation, the three unwinding units 3 are respectively a first unwinding unit 301, a second unwinding unit 302 and a third unwinding unit 303, wherein the first unwinding unit 301 is used to unwind the non-woven fabric 11, the second unwinding unit 302 is used to unwind the thermal insulation film 12, and the third unwinding unit 303 is used to unwind the printed film 13. Specifically, the thermal insulation film 12 in this embodiment is mainly an aluminized film, and the printed film 13 is mainly a PP printed layer or a P ET printing layer, and the inner cavity of the die head 5 is connected with two die openings 51, and the two die openings 51 are used to output the molten PE film downward. One of the PE films at the two die openings 51 is used to first combine one side of the non-woven fabric 11 with the thermal insulation film 12 to form a semi-finished composite film 15, and the other is used to combine the other side of the non-woven fabric 11 with the printing film 13 to form a finished composite film 1. In this way, the two sides of the non-woven fabric 11 are respectively combined with the thermal insulation film 12 and the printing film 13 through the adhesive layer 14 output from the two die openings 51, that is, the PE layer, to finally form an environmentally friendly composite non-woven fabric, and the environmentally friendly composite non-woven fabric is used to make packaging materials such as thermal insulation bags.

[0052] For the convenience of explanation, the die opening 51 corresponding to the formation of the semi-finished composite film 15 is the first die opening 511 , and the die opening 51 corresponding to the formation of the finished composite film 1 is the second die opening 512 .

[0053] When the laminating production device of this embodiment is in operation, the first unwinding unit 301 and the second unwinding unit 302 output the non-woven fabric 11 and the thermal insulation film 12 respectively, and the non-woven fabric 11 and the thermal insulation film 12 pass directly below the first die 511, that is, the laminating gap 63, and at the same time, the first die 511 outputs the adhesive layer 14 downward, and under the squeezing action of the first clamping roller 61 and the second clamping roller 62, the non-woven fabric 11, the adhesive layer 14 and the thermal insulation film 12 are stacked and connected in sequence to form a semi-finished composite film 15.

[0054] After the semi-finished composite film 15 is formed, the transmission path of the semi-finished composite film 15 is changed by the traction component 7, so that the direction of the input end of the transmission path is opposite to the direction of the output end, and the output end is located on the upper side of the input end. At the same time, the third unwinding unit 303 outputs the printed film 13. When the printed film 13 and the semi-finished composite film 15 pass directly below the second die 512, that is, the laminating gap 63, the second die 512 outputs the adhesive layer 14 downward. Under the extrusion of the first clamping roller 61 and the second clamping roller 62, the semi-finished composite film 15, the adhesive layer 14 and the printed film 13 are sequentially stacked and connected to form the finished composite film 1. It should be noted that in the finished composite film 1, the printed film 13 and the thermal insulation film 12 are respectively stacked on both sides of the non-woven fabric 11 through two adhesive layers 14.

[0055] After the finished composite film 1 is formed, the finished composite film 1 can be rolled up and collected by the winding assembly 8 .

[0056] In the above device, after the semi-finished composite film 15 is formed, the traction component 7 is used to change the transmission path of the semi-finished composite film 15, so that it is convenient to combine with the printed film 13 and the adhesive layer 14 output by the second die 512 below the second die 512 after being circuitous, so as to finally form a finished composite film 1, and the first die 511 and the second die 512 are consistent in length direction and are spaced along the length direction of the two. In this way, the two lamination processes can be carried out at the lamination gap 63 between the first clamping roller 61 and the second clamping roller 62. On the one hand, the number of composite rollers 6 can be reduced to ensure the uniformity of the extrusion force during the two lamination processes, reduce the number of parts, and thus reduce the equipment cost. On the other hand, since the two die openings 51 are connected to the inner cavity of the die head 5, only one detection system is needed to perform corresponding detection on the material inside the die head 5, which is conducive to reducing the detection cost. In addition, since only one die head 5 is provided, only one set of composite rollers 6 is needed, and the number of parts is reduced, making the device structure more compact, thereby reducing the occupied space of the equipment.

[0057] A further improvement is that the three unwinding units 3 each include an unwinding roller 31 rotating around its own axis, and the driving unit 2 drives the unwinding rollers 31 of the three unwinding units 3 to rotate at the same speed to synchronously output the non-woven fabric 11, the thermal insulation film 12 and the printed film 13.

[0058] After adopting this design, the unwinding rollers 31 in the three unwinding units 3 are driven to rotate at the same speed by the driving unit 2, so that the non-woven fabric 11, the thermal insulation film 12 and the printed film 13 can be output synchronously, which is beneficial to ensure the smoothness of the surface of the semi-finished composite film 15 and the finished composite film 1 after the lamination process, and avoid excessive stretching and deformation of one or two of the non-woven fabric 11, the thermal insulation film 12 and the printed film 13, which affects the quality of the final product. In this way, by synchronously outputting the non-woven fabric 11, the thermal insulation film 12 and the printed film 13, it is beneficial to improve the product quality of the final finished composite film 1.

[0059] like Figure 12-Figure 15 As shown, the three unwinding units 3 all include an unwinding roller 31 and an unwinding frame 32, wherein the unwinding frame 32 is mainly an upward U-shaped structure, the unwinding frame 32 is fixed above the base 9, and slots are arranged on both side walls of the unwinding frame 32, the slot openings of the slots are located at the top of the unwinding frame 32, the slot depth is greater than the roller shaft outer diameter of the unwinding roller 31, and the slot width of the slot is consistent with the roller shaft outer diameter of the unwinding roller 31, so that it is convenient to detachably connect the unwinding roller 31 and the unwinding frame 32, and in the connected state, the axis centerline of the unwinding roller 31 is horizontally arranged.

[0060] A further improvement is that among the unwinding rollers 31 of the three unwinding units 3 , two of the unwinding rollers 31 are detachably connected coaxially and are transmission-connected to the other unwinding roller 31 .

[0061] Specifically, the unwinding roller 31 of the second unwinding unit 302 and the unwinding roller 31 of the third unwinding unit 303, and the unwinding roller 31 of the second unwinding unit 302 and the output end of the driving unit 2 are all detachably connected via a connecting component 10, and the output end of the driving unit 2 and the unwinding roller 31 of the first unwinding unit 301 are detachably connected via a connecting component 10.

[0062] More specifically, the connecting assembly 10 includes two half-tube bodies 101 that are plugged together to form a connecting pipe. The cross-sections of the two half-tube bodies 101 are both semicircular. One of the half-tube bodies 101 is provided with a protrusion 104, and the other half-tube body 101 is provided with a recessed hole 105 that matches the protrusion 104, so that the two half-tube bodies 101 can be plugged together to form a connecting pipe. The connecting pipe is also penetrated by two groups of threaded bolts 102 and nuts 103 distributed along its own axial direction.

[0063] The driving unit 2 includes a driving motor 21, which is fixed to the top of the base 9 through a driving bracket 22. The output shaft of the driving motor 21 is fixedly passed through a driving sprocket 23. The driving sprocket 23 is connected to a driven sprocket 24 through a transmission chain 25. A concentric shaft 241 is fixedly passed through the coaxial centerline of the driven sprocket 24. The concentric shaft 241 is connected to a first bearing 242. The unwinding frame 32 of the first unwinding unit 301 is provided with an L-shaped side wall, and a through hole is provided on the side wall. The outer ring of the first bearing 242 is fixedly connected to the inner wall of the through hole, and the inner ring is fixedly connected to the concentric shaft 241. One end of the concentric shaft 241 extends between the two semi-tube bodies 101, and one of the bolts 102 penetrates the concentric shaft 241 and extends into the ends of the two semi-tube bodies 101, and the other bolt 102 penetrates the roller shaft of the unwinding roller 31 of the first unwinding unit 301.

[0064] In addition, the output shaft of the driving motor 21 and the second unwinding unit 302 are detachably connected via a connecting assembly 10. Specifically, the end of the output shaft of the driving motor 21 is sealedly connected to the circumferential inner wall of the connecting tube composed of two half-tube bodies 101, and one of the bolts 102 passes through the output shaft of the driving motor 21, and the other bolt 102 passes through the roller shaft of the unwinding roller 31 in the second unwinding unit 302, and the roller shaft of the unwinding roller 31 is sealedly connected to the circumferential inner wall of the connecting tube composed of two half-tube bodies 101.

[0065] The unwinding roller 31 of the second unwinding unit 302 and the unwinding roller 31 of the third unwinding unit 303 are also detachably connected via a connecting assembly 10, and are sealedly connected to the roller shafts of the two unwinding rollers 31 via the inner walls of the two half-tube bodies 101, and are fixedly connected to the roller shafts of the unwinding rollers 31 via two bolts 102 that penetrate the ends of the roller shafts of the two unwinding rollers 31 and then threadedly connected to nuts 103.

[0066] After adopting the above structure, the driving motor 21 runs, driving the driving sprocket 23 to rotate, and the driving sprocket 23 acts on the driven sprocket 24 through the transmission chain 25, so that the driven sprocket 24 rotates, and the concentric axis 241 of the driven sprocket 24 is connected to the roller axis of the unwinding roller 31 in the first unwinding unit 301 through the connecting component 10, so that the unwinding roller 31 of the first unwinding unit 301 rotates to output the non-woven fabric 11.

[0067] While the output shaft of the driving motor 21 rotates, the output shaft is connected to the roller shaft of the unwinding roller 31 in the second unwinding unit 302 through the connecting component 10, and the roller shaft of the unwinding roller 31 in the second unwinding unit 302 is connected to the roller shaft of the unwinding roller 31 in the third unwinding unit 303 through the connecting component 10, so that when the driving motor 21 is running, the unwinding rollers 31 in the second unwinding unit 302 and the third unwinding unit 303 rotate synchronously. In order to ensure the synchronous output of the non-woven fabric 11, the thermal insulation film 12 and the printed film 13, in this embodiment, the outer diameters of the unwinding rollers 31 in the three unwinding units 3 are consistent.

[0068] A further improvement is that a tensioning assembly 33 is provided between each of the three unwinding units 3 and the laminating gap 63 to tension the non-woven fabric 11, the thermal insulation film 12 and the printed film 13. By providing the tensioning assembly 33, it is possible to ensure that the non-woven fabric 11, the thermal insulation film 12 and the printed film 13 are kept in a certain tension state during the transmission process, which is beneficial to the flatness of the surface of the composite film 1 of the final finished product, and avoids one of the transmission tensions being too small during the transmission process, resulting in relaxation, which affects the quality of the final product.

[0069] There are three tensioning assemblies 33, which are arranged one by one and adjacent to the discharge side of the three unwinding units 3. The specific structure is as follows: Fig.16As shown, the tensioning assembly 33 includes a tensioning bracket 336 fixed just above the base 9, a U-shaped upward tensioning frame 332 is connected just above the tensioning bracket 336 through a spring 333, a tensioning roller 331 rotating around its own axis is arranged on the tensioning frame 332, the axial direction of the tensioning roller 331 is parallel to the axial direction of the first clamping roller 61, a sliding rod 334 extending in the vertical direction is also fixed below the tensioning frame 332, and a sliding sleeve 335 with an axial direction in the vertical direction is fixed above the tensioning bracket 336. The sliding sleeve 335 and the sliding rod 334 are slidably matched. In the three unwinding units 3, in the tensioning assembly 33 corresponding to the first unwinding unit 301, the circumferential outer edge of the tensioning roller 331 is attached to the top of the transmission path of the non-woven fabric 11, and the spring 333 is a tension spring. In the tensioning assemblies 33 corresponding to the second unwinding unit 302 and the third unwinding unit 303, the circumferential outer edges of the tensioning roller 331 are respectively attached to the bottom of the transmission path of the thermal insulation film 12 and the bottom of the transmission path of the printed film 13, and the spring 333 is a compression spring.

[0070] After adopting the above structure, the tensioning component 33 can automatically adjust the height position of the tensioning frame 332 and the tensioning roller 331 according to the tension of the non-woven fabric 11, the thermal insulation film 12 and the printed film 13 during the transmission process by using the spring 333 and the sliding rod 334 and the sliding sleeve 335 that slide together, so as to ensure that the transmission distances of the non-woven fabric 11, the thermal insulation film 12 and the printed film 13 are consistent within the same time, so as to ensure the product quality of the final composite film 1.

[0071] A further improvement is that the traction assembly 7 includes at least two traction rollers 71 rotating around their own axis, and the axis of the traction roller 71 and the axis of the first clamping roller 61 have an included angle.

[0072] A traction frame 72 is provided at both ends of the traction roller 71, and the traction frame 72 is fixed just above the base 9. The traction roller 71 rotates around its own axis between the two traction frames 72. After adopting the above structure, after the non-woven fabric 11, the thermal insulation film 12 and the adhesive layer 14 output by the first die 511 are stacked and connected to form a semi-finished composite film 15, the semi-finished composite film 15 passes through the traction roller 71 in sequence, thereby changing the transmission path of the semi-finished composite film 15, so that the output end of the transmission path is located above the input end, such as Figure 1-Figure 6 As shown, the semi-finished composite film 15 is conveniently connected with the printed film 13 and the adhesive layer 14 outputted from the second die 512 to form a finished composite film 1.

[0073] A further improvement is that two traction rollers 71 are provided; the axis center lines of the two traction rollers 71 are at an angle of 45° to the axis center line of the first clamping roller 61, and the axis center lines of the two traction rollers 71 are perpendicular to each other. After adopting the above design, the number of traction rollers 71 is reduced, thereby reducing the number of parts and components of the device, simplifying the structure, making the device structure more compact, reducing the occupied space, and reducing the device cost. The axis center lines of the two traction rollers 71 are perpendicular to each other and are at an angle of 45° to the axis center line of the first clamping roller 61, which is conducive to ensuring that the semi-finished composite film 15 is uniformly stretched along its own width direction during the transmission process, so as to ensure the quality of the complete composite film formed by the final coating.

[0074] In order to guide the semi-finished composite film 15 and the finished composite film 1, a guide roller 91 is also provided on the base 9 through a guide frame 92. The guide frame 92 is fixed on the top of the base 9. The guide roller 91 rotates on the guide frame 92 around its own axis. The axial direction of the guide roller 91 is parallel to the axial direction of the first clamping roller 61. Two guide rollers 91 are provided, which are respectively located between the traction component 7 and the laminating gap 63 and between the laminating gap 63 and the winding component 8, so as to guide the transmission path of the semi-finished composite film 15 and the finished composite film 1, as shown in FIG. Figure 5-Figure 7 shown.

[0075] The specific structure of the winding assembly 8 is as follows: Figure 6 and Figure 8 As shown, the winding assembly 8 includes a winding motor 81, the casing of the winding motor 81 is fixed to the top of the base 9 through a winding bracket 82, the output shaft is connected to the roller shaft of the winding roller 83 coaxially, and the winding assembly 8 also includes a U-shaped upward winding frame 84, the winding frame 84 is fixed to the top of the base 9, and winding slots are provided on the top of the two side walls of the winding frame 84 for the roller shaft of the winding roller 83 to be inserted from top to bottom, and one end of the roller shaft of the winding roller 83 is detachably connected to the output shaft of the winding motor 81 through a connecting assembly 10.

[0076] After adopting the above structure, the winding motor 81 is used to drive the winding roller 83 to rotate, so as to wind up the finished composite film 1 and concentrate it on the winding roller 83. After the collection is completed, the bolts 102 and nuts 103 are removed, and the two half-tube bodies 101 are separated, and the winding roller 83 can be removed from the winding frame 84. When installing, after the roller shaft of the winding roller 83 is set on the bottom of the winding slots at both ends of the winding frame 84, the two half-tube bodies 101 are connected through the plug-in mating convex columns 104 and concave holes 105 to form a connecting pipe that is sealed and connected to the roller shaft of the winding roller 83 and the circumferential outer edge of the output shaft end of the winding motor 81. Two bolts 102 are passed through the connecting pipe, one of which passes through the end of the roller shaft of the winding roller 83, and the other passes through the end of the output shaft of the winding motor 81. The nut 103 is screwed on to realize the driving connection between the winding motor 81 and the winding roller 83.

[0077] The specific structure of the feeding device 4 is as follows: Fig.10 and Fig.11 As shown, the feeding device 4 includes a feeding rack 41 fixed above the base 9, a screw conveyor 43 extending in the horizontal direction is fixed above the feeding rack 41, the length direction of the screw conveyor 43 is perpendicular to the axial direction of the first clamping roller 61, a barrel 42 connected to the inner cavity of the screw conveyor 43 is arranged above the screw conveyor 43, a spiral blade (not shown in the figure) is arranged in the screw conveyor 43, one end of the screw conveyor 43 is connected to the die head 5, and the other end is provided with a rotating unit for driving the spiral blade to rotate around its own axis, through the rotation of the spiral blade, the material in the barrel 42 is transmitted from the inner cavity of the screw conveyor 43 to the die head 5, and output through the two die openings 51, and the coating forms an adhesive layer 14, and the two adhesive layers 14 are respectively laminated between the non-woven fabric 11 and the thermal insulation film 12 and between the non-woven fabric 11 and the printing film 13.

[0078] The rotating component includes a feeding motor 44, which is fixed just above the feeding rack 41 and has an output shaft connected to a driving synchronous wheel 45, which is connected to a driven synchronous wheel 46 via a synchronous belt 47, and the driven synchronous wheel 46 is connected to the spiral blade coaxially, and the rotating component also includes a shell 48 with one side open and the open side facing away from the screw conveyor 43, and a shell cover 49 with a fixed cover arranged on the open side of the shell 48. The driving synchronous wheel 45, the driven synchronous wheel 46 and the synchronous belt 47 are all arranged in a protective cavity enclosed by the shell 48 and the shell cover 49.

[0079] After the feeding motor 44 rotates, it drives the driving synchronous wheel 45 to rotate, and the driving synchronous wheel 45 acts on the driven synchronous wheel 46 through the synchronous belt 47, so that the driven synchronous wheel 46 rotates around its own axis, driving the spiral blade to rotate, so that the material in the screw conveyor 43 is transported, passes through the inner cavity of the die head 5, and flows downward from the die opening 51 to form an adhesive layer 14.

[0080] In the composite pair of rollers 6, the first clamping roller 61 is a rubber roller, and the second clamping roller 62 is cold steel. With the above design, the rubber roller is used to ensure that the first clamping roller 61 and the second clamping roller 62 can cooperate with each other to apply sufficient extrusion force to the non-woven fabric 11, the thermal insulation film 12, the printed film 13 and the adhesive layer 14, so that one side of the non-woven fabric 11 is firmly connected to the thermal insulation film 12 through the adhesive layer 14 output by the first die 511, and the other side is firmly connected to the printed film 13 through the adhesive layer 14 output by the second die 512, thereby ensuring the connection firmness between the layers of the final finished composite film 1 and avoiding the phenomenon of fracture between the layers. This is beneficial to improving product quality. The second clamping roller 62 is designed with cold steel, which can quickly cool down after lamination to avoid the semi-finished composite film 15 and the finished composite film 1 from being too hot, resulting in adhesion between the finished composite films 1 when they are finally wound and collected on the winding roller 83, affecting product quality.

[0081] A further improvement is that a pressure component 64 is provided on the side of the first clamping roller 61 away from the second clamping roller 62. The pressure component 64 is used to apply a force to the first clamping roller 61 toward the second clamping roller 62 during lamination, so that there is sufficient extrusion force between the first clamping roller 61 and the second clamping roller 62, ensuring that the non-woven fabric 11, the thermal insulation film 12, the printed film 13, and the adhesive layer 14 output by the two dies 51 can be firmly connected, thereby improving the quality of the finished composite film 1.

[0082] Specifically, Fig.17 and Fig.18 As shown, the pressure assembly 64 includes a cylinder 641, the cylinder barrel of the cylinder 641 is fixed to the top of the base 9 through a fixing frame 642, the piston rod extends in a direction parallel to the axial centerline of the first clamping roller 61 and the second clamping roller 62 and faces the first clamping roller 61, the piston rod is fixedly connected to a U-shaped pressure frame 643, and an axially parallel pressure roller 644 and the first clamping roller 61 are arranged between the two side walls of the pressure frame 643, wherein the two ends of the pressure roller 644 are provided with a second bearing 6441, the inner ring of the second bearing 6441 is fixedly connected to the roller shaft of the pressure roller 644, and the outer ring is fixedly connected to the pressure frame 643; strip openings 6431 are also provided on the two side walls of the pressure frame 643, the strip openings 6431 extend in a horizontal direction perpendicular to the axial direction of the first clamping roller 61, and sliders 615 are provided at both ends of the first clamping roller 61, and the sliders 615 slide on the inner side of the strip opening 6431. A sliding frame 645 is fixedly connected to the lower part of the pressure frame 643. A slide rail 646 extending in a horizontal direction perpendicular to the axial direction of the first clamping roller 61 is arranged below the slide rail 645. The slide rail 645 slides on the slide rail 646. The two ends of the second clamping roller 62 are provided with clamping roller frames 621. The clamping roller frames 621 are fixed above the base 9. The second clamping roller 62 rotates around its own axis between the two clamping roller frames 621.

[0083] After adopting the above structure, when laminating production is carried out, the piston rod of the cylinder 641 is telescoped outward to push the pressure frame 643. Under the support of the sliding frame 645 and the sliding cooperation with the slide rail 646, the pressure roller 644 moves toward the first clamping roller 61, and the sliders 615 at both ends of the first clamping roller 61 move relatively toward the cylinder 641, so that the first clamping roller 61 can be close to the second clamping roller 62. The laminating gap 63 between the two is small enough to apply sufficient extrusion force to ensure the forming quality of the final composite film 1.

[0084] Second embodiment

[0085] like Fig.19 and Fig. 20As shown, the coating production device for environmentally friendly composite non-woven fabric for insulation bags of the second embodiment of the present invention is based on the first embodiment, and the difference lies in that the coating gap 63 includes a first coating section 631 and a second coating section 632 which are connected in sequence along its own length direction, the second coating section 632 is located in the first coating section 631, the non-woven fabric 11, the insulation film 12 and the adhesive layer 14 outputted from one of the die openings 51 are stacked and pressed in the first coating section 631 to form a semi-finished composite film 15, the semi-finished composite film 15, the printed film 13 and the adhesive layer 14 outputted from another die opening 51 are stacked and pressed in the second coating section 632 to form a finished composite film 1, the width of the first coating section 631 is smaller than the width of the second coating section 632; the difference between the widths of the first coating section 631 and the second coating section 632 is less than or equal to the sum of the thickness of the adhesive layer 14 and the thickness of the printed film 13.

[0086] In the first laminating section 631, the non-woven fabric 11, the thermal insulation film 12 and the adhesive layer 14 output from the first die 511 are laminated and connected to form a semi-finished composite film 15, while in the second laminating section 632, the semi-finished composite film 15, the printed film 13 and the adhesive layer 14 output from the second die 512 are laminated to form a finished composite film 1. Therefore, the width of the first laminating section 631 is slightly smaller than that of the second laminating section 632 to reduce the difference in the extrusion force on the film material when the two sides are extruded, so as to ensure that the forces of the two laminations are uniform.

[0087] Specifically, the first clamping roller 61 includes a first clamping section 611 and a second clamping section 612 which are connected along the coaxial centerline of the first clamping roller 61 and are both cylindrical. The second clamping roller 62 is cylindrical. The outer diameter of the first clamping section 611 is larger than the outer diameter of the second clamping section 612, and the circumferential outer edge of the pressure roller 644 is in contact with the circumferential outer edge of the first clamping roller 61. With the above design, the coating gap 63 is formed by the first coating section 631 and the second coating section 632 being connected, and the width of the first coating section 631 is slightly smaller than the width of the second coating section 632, so as to ensure that a uniform extrusion force can be applied to the material during the two lamination processes.

[0088] Third embodiment

[0089] like Fig.21 As shown, the coating production device for environmentally friendly composite non-woven fabric for insulation bags of the third embodiment of the present invention is based on the first embodiment, with the difference that the first clamping roller 61 includes a cylindrical clamping roller body 613 and two extrusion units distributed axially along the clamping roller body 613 and corresponding to the two die openings 51, the two extrusion units include symmetrically distributed and elastic extrusion strips 614, the extension trajectory of the extrusion strips 614 is an equidistant spiral curve coaxial with the clamping roller body 613, so as to evenly laminate the adhesive layers 14 output from the two die openings 51 between the non-woven fabric 11 and the insulation film 12 and between the semi-finished composite film 15 and the printed film 13.

[0090] The nip roller body 613 is a rigid roller body, and the extrusion strip 614 is a spiral strip made of rubber material, which is spirally wound around the circumferential outer edge of the nip roller body 613. Since the extrusion strip 614 is elastic, it can undergo elastic deformation during the extrusion of the material, and through the rotation of the nip roller body 613, the spiral extrusion strip 614 applies an extrusion force while diffusing the adhesive layer 14 output from the first die 511 from the center to both sides, so that it is evenly distributed between the non-woven fabric 11 and the thermal insulation film 12, and diffusing the adhesive layer 14 output from the second die 512 from the center to both sides, so that it is evenly distributed between the non-woven fabric 11 and the printed film 13, which is ultimately conducive to the uniform formation of the adhesive layers 14 at the two locations between one side of the non-woven fabric 11 and the thermal insulation film 12 and between the other side of the non-woven fabric 11 and the printed film 13, thereby improving the product quality of the finished composite film 1.

[0091] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A laminating production device for environmentally friendly composite non-woven fabrics for thermal insulation bags, characterized in that ,include: An unwinding assembly, the unwinding assembly comprising a driving unit (2) and three unwinding units (3), the driving unit (2) and the three unwinding units (3) cooperating with each other to output the non-woven fabric (11), the thermal insulation film (12) and the printed film (13); A laminating assembly, the laminating assembly comprising a feeding device (4), a die head (5) and a composite pair of rollers (6), the composite pair of rollers (6) comprising a first clamping roller (61) and a second clamping roller (62) whose axes are arranged side by side in the same horizontal plane and rotate around their own axes, a laminating gap (63) extending parallel to the axes of the first clamping roller (61) and the second clamping roller (62) being provided between the first clamping roller (61) and the second clamping roller (62), the input end of the die head (5) being connected to the feeding device (4), and the output end having two die openings (51) located directly above the laminating gap (63), extending parallel to the length direction of the laminating gap (63) and outputting an adhesive layer (14) downward, wherein the adhesive layer (14) outputted from one of the die openings (51) is used to be laminated and pressed between one side of the non-woven fabric (11) and the thermal insulation film (12) at the laminating gap (63) to form a semi-finished composite film (15); A traction component (7), the traction component (7) being used to guide the transmission path of the semi-finished composite film (15) so that the output end of the transmission path is located on one side of the input end and in the opposite direction, so that the adhesive layer (14) output from the other die opening (51) is laminated and pressed between the side of the non-woven fabric (11) in the semi-finished composite film (15) facing away from the thermal insulation film (12) and the printed film (13) at the laminating gap (63), thereby forming a finished composite film (1); A winding assembly (8), wherein the winding assembly (8) is used to wind and collect the finished composite film (1); The traction assembly (7) comprises at least two traction rollers (71) that rotate around their own axis lines, and the axis lines of the traction rollers (71) and the axis line of the first clamping roller (61) form an angle.

2. The coating production device for environmentally friendly composite non-woven fabric for thermal insulation bags according to claim 1 is characterized in that: Two traction rollers (71) are provided; the included angles between the axis lines of the two traction rollers (71) and the axis line of the first clamping roller (61) are both 45°, and the axis lines of the two traction rollers (71) are perpendicular to each other.

3. The coating production device for environmentally friendly composite non-woven fabric for thermal insulation bags according to claim 1 is characterized in that: The laminating gap (63) comprises a first laminating section (631) and a second laminating section (632) which are connected in sequence along its length direction, the second laminating section (632) being located in the first laminating section (631), the non-woven fabric (11), the thermal insulation film (12) and the adhesive layer (14) outputted from one of the die openings (51) being stacked and pressed together in the first laminating section (631) to form a semi-finished composite film (15), the semi-finished composite film (15), the printed film (13) and the adhesive layer (14) outputted from another die opening (51) being stacked and pressed together in the second laminating section (632) to form a finished composite film (1), and the width of the first laminating section (631) is smaller than the width of the second laminating section (632).

4. The coating production device for environmentally friendly composite non-woven fabric for thermal insulation bags according to claim 3 is characterized in that: The difference between the width of the first coating section (631) and the width of the second coating section (632) is less than or equal to the sum of the thickness of the adhesive layer (14) and the thickness of the printed film (13).

5. The coating production device for environmentally friendly composite non-woven fabric for thermal insulation bags according to claim 4 is characterized in that: The first clamping roller (61) comprises a first clamping section (611) and a second clamping section (612) which are connected along the coaxial centerline of the first clamping roller and are both cylindrical; the second clamping roller (62) is cylindrical; the outer diameter of the first clamping section (611) is greater than the outer diameter of the second clamping section (612).

6. The coating production device for environmentally friendly composite non-woven fabric for thermal insulation bags according to claim 1 is characterized in that: The first clamping roller (61) comprises a cylindrical clamping roller body (613) and two extrusion units distributed axially along the clamping roller body (613) and corresponding to the two die openings (51), the two extrusion units comprising symmetrically distributed and elastic extrusion strips (614), the extension trajectory of the extrusion strips (614) being an equidistant spiral curve coaxial with the clamping roller body (613), so as to uniformly laminate the adhesive layer (14) output from the two die openings (51) between the non-woven fabric (11) and the thermal insulation film (12) and between the semi-finished composite film (15) and the printed film (13).

7. The coating production device for environmentally friendly composite non-woven fabric for thermal insulation bags according to claim 1 is characterized in that: The three unwinding units (3) each comprise an unwinding roller (31) that rotates about its own axis, and the driving unit (2) drives the unwinding rollers (31) of the three unwinding units (3) to rotate at the same speed, so as to synchronously output the non-woven fabric (11), the thermal insulation film (12) and the printed film (13).

8. The coating production device for environmentally friendly composite non-woven fabric for thermal insulation bags according to claim 7, characterized in that: Among the three unwinding rollers (31) of the unwinding units (3), two of the unwinding rollers (31) are detachably connected coaxially and are transmission-connected to the other unwinding roller (31).

9. The coating production device for environmentally friendly composite non-woven fabric for thermal insulation bags according to claim 8, characterized in that: A tensioning assembly (33) is provided between each of the three unwinding units (3) and the laminating gap (63) to tension the non-woven fabric (11), the thermal insulation film (12) and the printed film (13) respectively.

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