Hot melt adhesive compounding device and method

Abstract

The present invention discloses a hot melt adhesive compounding device and method, which aims to solve the problem that the hot melt adhesive sprayed during the hot melt adhesive compounding process can penetrate through the protective film and adhere to the extrusion roller, forming small solid particles, which affects the adhesive compounding strength. The invention includes a first unwinding mechanism, on which the first unwinding material is loaded; a second unwinding mechanism, on which the second unwinding material is loaded; an extrusion compounding mechanism; a winding mechanism; a scraper and two extrusion rollers are provided on the extrusion compounding mechanism, the scraper is close to the outer wall of one extrusion roller, and a glue spraying assembly is provided between the two extrusion rollers. The first unwinding material and the second unwinding material respectively bypass the two extrusion rollers, and the glue spraying assembly sprays hot melt adhesive between the first unwinding material and the second unwinding material. The first unwinding material and the second unwinding material are squeezed by the two extrusion rollers to form a hot melt composite material; the winding mechanism winds up the hot melt composite material. It is not easy for colloid to remain on the extrusion rollers, thereby ensuring the extrusion strength of the extrusion rollers.

Description

Technical Field

[0001] The present invention relates to hot melt adhesive compounding technology, and more particularly to a hot melt adhesive compounding device and method. Background Art

[0002] Hot melt adhesive lamination technology is a process used to bond two or more materials together using hot melt adhesive. During operation, atomized hot melt adhesive is sprayed onto the different materials, and then a certain amount of pressure is applied to bond the materials together. The company's newly developed product requires a protective film to be applied to the surface of the materials. However, in actual operation, it was found that the sprayed hot melt adhesive could penetrate the protective film and adhere to the extrusion roller, forming small solid particles, which affected the adhesive's strength. Summary of the Invention

[0003] In order to overcome the above-mentioned shortcomings, the present invention provides a hot melt adhesive compounding device and method, which has good uniformity and density in hot melt adhesive spraying, and it is not easy for colloid to remain on the extrusion roller, thereby ensuring the extrusion strength of the extrusion roller and thus ensuring the quality of the product.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: a hot melt adhesive compounding device, comprising:

[0005] a first unwinding mechanism, on which a first unwinding material is loaded;

[0006] a second unwinding mechanism, on which a second unwinding material is loaded;

[0007] Extrusion composite mechanism;

[0008] Winding mechanism;

[0009] A scraper and two extrusion rollers are provided on the extrusion composite mechanism. The scraper is close to the outer wall of one extrusion roller. A glue spraying assembly is provided between the two extrusion rollers. The first unwinding material and the second unwinding material respectively pass around the two extrusion rollers. The glue spraying assembly sprays hot melt adhesive between the first unwinding material and the second unwinding material. The first unwinding material and the second unwinding material are extruded by the two extrusion rollers to form a hot melt composite material; the winding mechanism winds up the hot melt composite material.

[0010] During the hot melt adhesive lamination process, hot melt adhesive is sprayed between the first and second unwinding materials through the adhesive spraying assembly. The hot melt adhesive atomizes into a filamentous structure and evenly distributes on the surfaces of the first and second unwinding materials. After being squeezed by two extrusion rollers, the hot melt adhesive is laminated between the first and second unwinding materials to form a hot melt composite material. The rewinding mechanism rewinds the hot melt composite material. A scraper blade rests against the outer wall of one of the extrusion rollers, scraping away any residual adhesive on the outer wall to prevent the formation of small solid particles that could affect the adhesive lamination strength.

[0011] The hot melt adhesive compounding device of this patent application makes the hot melt adhesive spraying uniform and dense, and it is not easy for the colloid to remain on the extrusion roller, which ensures the extrusion strength of the extrusion roller and thus ensures the quality of the product.

[0012] Preferably, the scraper is connected to the telescopic mechanism, which includes a fixed sleeve and an airbag sleeve. The airbag sleeve is installed in the fixed sleeve, which is connected to a telescopic strip that can be telescopically moved. The scraper is installed on the telescopic strip. The airbag sleeve is inflated and bulges outward, thereby pushing the telescopic strip to move outward.

[0013] The telescopic mechanism allows the scraper blade to move and adjust, allowing it to engage or disengage from the outer wall of the squeeze roller. When the airbag is inflated, the pressure increases and it bulges outward, pushing the telescopic strip outward. When the airbag is deflated, the pressure inside it decreases and it retracts, freeing the strip from its compressive force, allowing the scraper blade to separate from the outer wall of the squeeze roller.

[0014] Preferably, a fine-tuning cavity is provided on the telescopic strip, and a slider is provided at one end of the scraper. The slider is slidably installed in the fine-tuning cavity. A positioning spring is installed in the fine-tuning cavity. The positioning spring abuts against the slider. The fine-tuning cavity is connected to the high-pressure air pipe. The high-pressure air pipe introduces high-pressure airflow into the fine-tuning cavity to cause the slider to move toward the direction of the positioning spring for fine-tuning.

[0015] A fine-tuning chamber is provided on the telescopic strip to enable fine-tuning of the scraper blade. When the airbag expands and brings the scraper blade closer to the outer wall of the squeeze roller, high-pressure air is introduced into the fine-tuning chamber, increasing the air pressure within the chamber. This pushes the slider toward the positioning spring for fine-tuning, achieving secondary fine-tuning of the scraper blade. The pressing force of the scraper blade against the outer wall of the squeeze roller is adjusted by controlling the air pressure entering the fine-tuning chamber, thereby adjusting the scraper blade's scraping force on the colloid, avoiding damage to the squeeze roller surface caused by excessive force or ineffective scraping due to insufficient force.

[0016] Preferably, a plurality of glue blowing holes are provided on the glue scraper, and the glue blowing holes are connected to the high-pressure air inlet pipe.

[0017] After the scraper scrapes off the colloid remaining on the squeeze roller, the airflow from the blowing hole blows towards the colloid, which helps the colloid to separate from the squeeze roller. The airflow also helps the colloid solidify, making the solidified colloid easier to be scraped off by the scraper.

[0018] Preferably, a waste trough is provided below the scraper blade.

[0019] The waste trough is provided to facilitate the collection of the scraped colloid.

[0020] Preferably, the first unwinding mechanism and the second unwinding mechanism are both provided with an unwinding tensioning assembly, and the winding mechanism is provided with a winding tensioning assembly. The unwinding tensioning assembly and the winding tensioning assembly both include a tensioning piston cylinder and a tensioning arm. The tensioning piston cylinder telescopic rod is connected to the tensioning arm. The tensioning arm is rotatably arranged, and a tensioning wheel is installed on the tensioning arm.

[0021] The arrangement of the unwinding tensioning assembly and the rewinding tensioning assembly ensures the stability and reliability of the unwinding and rewinding processes.

[0022] Preferably, a loading assembly is installed on the first unwinding mechanism, and the loading assembly includes a support platform and a lifting piston cylinder. One end of the support platform is rotatably installed on the first unwinding mechanism, and a positioning baffle is set at the other end of the support platform. The lifting piston cylinder telescopic rod is connected to the support platform.

[0023] The first unrolled material is heavy. When loading, the telescopic rod of the lifting piston cylinder extends outward, pushing the support platform downward to facilitate loading of the first unrolled material onto the support platform. Once the first unrolled material is loaded onto the support platform, the telescopic rod of the lifting piston cylinder retracts inward, pulling the support platform upward and rotating it, thereby raising the first unrolled material to the appropriate height and completing the loading operation. A positioning baffle positions the first unrolled material and prevents it from slipping.

[0024] Preferably, the glue spraying assembly includes a glue spraying head, a mixing flow channel and an atomization chamber are arranged on the glue spraying head, a hot melt glue hose is arranged in the mixing flow channel, an air inlet nozzle and a glue feed nozzle are arranged on the glue spraying head, the air inlet nozzle and the glue feed nozzle are connected to the mixing flow channel and the hot melt glue hose respectively, a plurality of atomization glue spraying holes are arranged on the nozzle head, and the atomization chamber is connected between the mixing flow channel and the atomization glue spraying holes.

[0025] The hot melt adhesive is delivered to the hot melt adhesive tube through the adhesive inlet nozzle, and the high-pressure airflow is delivered to the mixing flow channel through the air inlet nozzle, so that the hot melt adhesive and the high-pressure airflow are mixed in the mixing flow channel, and then delivered to the atomization chamber for further mixing and atomization, and finally the hot melt adhesive in the form of threads is sprayed out from the atomization spray hole.

[0026] Preferably, a plurality of diversion atomization cavities are provided between the atomization chamber and the atomization glue spraying hole on the glue spraying head, and diversion holes are provided between the diversion atomization cavity and the atomization chamber, and each diversion atomization cavity is connected to at least one atomization glue spraying hole.

[0027] The split atomization chamber further atomizes the hot melt adhesive to ensure that the atomized glue spray hole can spray out the hot melt adhesive in the form of filaments.

[0028] A hot melt adhesive compounding method is operated by a hot melt adhesive compounding device, and includes the following steps: S1, loading a first unwinding material and a second unwinding material onto a first unwinding mechanism and a second unwinding mechanism, respectively; S2, passing the first unwinding material and the second unwinding material around two squeezing rollers, respectively, and combining the first unwinding material and the second unwinding material and winding them around a winding mechanism for winding; S3, a glue spraying component sprays hot melt adhesive between the first unwinding material and the second unwinding material; S4, the two squeezing rollers rotate to extrude the first unwinding material and the second unwinding material, and the hot melt adhesive is compounded between the first unwinding material and the second unwinding material to form a hot melt composite material, and at the same time, a scraper is brought into contact with the outer wall of the squeezing roller, and as the squeezing roller rotates, the scraper scrapes off the colloid on the outer wall of the squeezing roller; S5, the winding mechanism winds up the hot melt composite material.

[0029] The first unwinding material and the second unwinding material are respectively made of protective films of roll paper and non-woven fabric. During the hot melt adhesive compounding process, the protective film is compounded to the roll paper, and the protective film of the non-woven fabric can penetrate the hot melt adhesive. During the extrusion process of the first unwinding material and the second unwinding material by the two extrusion rollers, the hot melt adhesive penetrates the protective film and remains on the outer wall of the extrusion roller. As the extrusion roller rotates, the scraper blade against the outer wall of the extrusion roller scrapes off the colloid remaining on the outer wall of the extrusion roller to prevent the colloid from forming small solid particles and affecting the adhesive compound strength.

[0030] Compared with the prior art, the beneficial effects of the present invention are: (1) the hot melt adhesive compounding device of the present patent application makes the hot melt adhesive spraying uniform and dense, and it is not easy for the colloid to remain on the extrusion roller, thereby ensuring the extrusion strength of the extrusion roller and thus ensuring the quality of the product; (2) the scraper blade can be fine-tuned twice in the process of approaching the extrusion roller, and the pressing force of the scraper blade against the outer wall of the extrusion roller is adjusted by controlling the air pressure entering the fine-tuning chamber, thereby realizing the adjustment of the scraper blade's scraping force on the colloid, avoiding excessive force causing damage to the surface of the extrusion roller or excessive force. The scraping effect on the colloid is not obvious; (3) The loading component is installed on the first unwinding mechanism to facilitate the loading operation of the first unwinding material; (4) After the scraper scrapes the colloid remaining on the extrusion roller, the blowing hole on the scraper blows air to the colloid, which is conducive to the colloid being separated from the extrusion roller, and the blown air is conducive to the solidification of the colloid, and the solidified colloid is more easily scraped off by the scraper; (5) The hot melt adhesive sprayed by the spraying component easily forms a filamentous structure and is sprayed between the first unwinding material and the second unwinding material, with good uniformity and density, and a good composite effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the present invention.

[0032] Figure 2 Schematic diagram of the installation of two squeezing rollers in embodiment 1 of the present invention.

[0033] Figure 3 Schematic diagram of the installation of the scraper blade of embodiment 1 of the present invention.

[0034] Figure 4 is a schematic diagram of the glue spraying assembly of the present invention;

[0035] Figure 5 Schematic diagram of the installation of the scraper blade of embodiment 2 of the present invention.

[0036] Figure 6 Schematic diagram of the installation of two squeezing rollers in embodiment 2 of the present invention.

[0037] In the figure: 1. First unwinding mechanism, 2. First unwinding material, 3. Second unwinding mechanism, 4. Second unwinding material, 5. Extrusion compounding mechanism, 6. Rewinding mechanism, 7. Glue scraper, 8. Extrusion roller, 9. Glue spraying assembly, 10. Hot-melt composite material, 11. Guide wheel, 12. Deviation correction sensor, 13. Tensioning piston cylinder, 14. Tensioning arm, 15. Support platform, 16. Lifting piston cylinder, 17. Positioning baffle, 18. Fixed sleeve, 19. Airbag sleeve, 20. Telescopic strip, 21. Guide groove, 22. Fine-tuning chamber, 23. Slider, 24. Positioning spring, 25. High-pressure air pipe, 26. Glue blowing hole, 27. High-pressure air inlet pipe, 28. Waste trough, 29. Cooling pipe, 30. Heating pipe, 31. Slide, 32. Screw, 33. Pinion, 34. Screw sleeve, 35. Large gear plate, 36. Turntable, 37. Handle, 38. Glue spray head, 39. Mixing channel, 40. Atomizing chamber, 41. Temperature detector, 42. Hot melt hose, 43. Air inlet nozzle, 44. Glue inlet nozzle, 45. Atomizing glue spray hole, 46. Lower stirring blade, 47. Upper stirring blade, 48. Upper guide plate, 49. Lower guide plate, 50. Diverter atomizing chamber, 51. Diverter hole. DETAILED DESCRIPTION

[0038] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0039] Example 1: A hot melt adhesive compounding device (see attached Figure 1 To the attached Figure 4 ),include:

[0040] A first unwinding mechanism 1, on which a first unwinding material 2 is loaded. In this embodiment, the first unwinding material 2 is a paper roll;

[0041] A second unwinding mechanism 3 is loaded with a second unwinding material 4. In this embodiment, the second unwinding material 4 is a protective film made of non-woven fabric;

[0042] Extrusion compounding mechanism 5;

[0043] Winding mechanism 6;

[0044] A scraper 7 and two squeezing rollers 8 are provided on the extrusion composite mechanism 5. The two squeezing rollers 8 are arranged close to each other. The scraper 7 is close to the outer wall of one squeezing roller 8. A glue spraying assembly 9 is provided between the two squeezing rollers 8. The glue spraying assembly 9 is installed at the upper position of the extrusion composite mechanism 5. The first unwinding material 2 and the second unwinding material 4 respectively pass around the two squeezing rollers 8. The glue spraying assembly 9 sprays hot melt adhesive between the first unwinding material 2 and the second unwinding material 4. The first unwinding material 2 and the second unwinding material 4 are squeezed by the two squeezing rollers 8 to form a hot melt composite material 10; the winding mechanism 6 winds up the hot melt composite material 10.

[0045] Several guide rollers 11 are installed on both the first unwinding mechanism 1 and the second unwinding mechanism 3. The first unwinding material 2 passes around the guide rollers 11 and then around a squeeze roller 8. The second unwinding material 4 passes around the guide rollers 11 and then around another squeeze roller 8. Both the first unwinding mechanism 1 and the second unwinding mechanism 3 are equipped with unwinding rollers and several pairs of correction sensors 12. The correction sensors 12 are photoelectric sensors. Each pair of correction sensors 12 is placed on the two side edges of the unwinding material. The spacing between the two correction sensors 12 is set to match the width of the unwinding material. The unwinding rollers can move axially to correct the deviation. When the position of the unwinding material deviates during the unwinding process, the correction sensor 12 can detect the signal and correct the deviation by axially moving the unwinding rollers.

[0046] Both the first unwinding mechanism 1 and the second unwinding mechanism 3 are equipped with an unwinding tensioning assembly, while the rewinding mechanism 6 is equipped with a rewinding tensioning assembly. Both the unwinding tensioning assembly and the rewinding tensioning assembly include a tensioning piston cylinder 13 and a tensioning arm 14. The telescopic rod of the tensioning piston cylinder 13 is rotatably connected to the tensioning arm 14. The tensioning arm 14 is rotatably arranged, and the tensioning piston cylinder 13 is rotatably arranged. A tensioning wheel is mounted on the tensioning arm 14. The tensioning wheels on the two unwinding tensioning assemblies respectively press against the first unwinding material 2 and the second unwinding material 4. The tensioning wheels on the rewinding tensioning assemblies press against the hot-melt composite material 10.

[0047] The first unwinding mechanism 1 is provided with a loading assembly, which includes a support platform 15 and a lifting piston cylinder 16. The upper end of the lifting piston cylinder 16 is rotatably mounted on the first unwinding mechanism 1, and one end of the support platform 15 is rotatably mounted on the first unwinding mechanism 1. A positioning baffle 17 is provided at the other end of the support platform 15. The telescopic rod of the lifting piston cylinder 16 is rotatably connected to the support platform 15.

[0048] The scraper blade 7 is connected to a telescopic mechanism. The thickness of the front end of the scraper blade 7 gradually decreases to form a pointed blade tip. The telescopic mechanism includes a fixed sleeve 18 and an airbag sleeve 19. The airbag sleeve 19 is installed in the fixed sleeve 18. The airbag sleeve 19 is closed at both ends. One end of the airbag sleeve 19 is connected to a vent tube, which is used to inflate and deflate the airbag sleeve 19. A gap exists between the outer wall of the airbag sleeve 19 and the inner wall of the fixed sleeve 18. The fixed sleeve 18 is connected to a telescopic strip 20 that can be telescopically moved. The scraper blade 7 is mounted on the telescopic strip 20. When the airbag sleeve 19 inflates, it bulges outward, thereby pushing the telescopic strip 20 outward. Guide grooves 21 are provided on the side walls of the fixed sleeve 18 and correspond to the telescopic strip 20. The telescopic strip 20 and the guide grooves 21 are slidably connected. A ridge is provided on the inner end of the telescopic strip 20 to prevent the telescopic strip 20 from being pushed away from the fixed sleeve 18. A fine-tuning cavity 22 is provided on the telescopic strip 20, and a slider 23 is provided at one end of the squeegee 7. The slider 23 is slidably mounted within the fine-tuning cavity 22. A positioning spring 24 is mounted within the fine-tuning cavity 22, and the positioning spring 24 abuts against the slider 23. A stepped surface is provided within the fine-tuning cavity 22, and the slider 23 abuts against the stepped surface. The fine-tuning cavity 22 is connected to a high-pressure air pipe 25, and the slider 23 is disposed between the positioning spring 24 and the high-pressure air pipe 25. The high-pressure air pipe 25 introduces high-pressure air into the fine-tuning cavity 22, causing the slider 23 to move toward the positioning spring 24 for fine adjustment.

[0049] Waste trough 28 is provided below the scraper 7. Two scrapers 7 are close on the outer wall of the squeezing roller 8 corresponding to the second unwinding material 4, one scraper 7 is close to the squeezing roller 8 middle position, and the other scraper 7 is close to the squeezing roller 8 lower position.

[0050] The glue spray assembly 9 includes a glue spray head 38, which is provided with a mixing channel 39 and an atomizing chamber 40. A temperature detector 41 is installed on the glue spray head 38, and the detection head of the temperature detector 41 is placed in the atomizing chamber 40. A hot melt adhesive hose 42 is installed in the mixing channel 39. The glue spray head 38 is provided with an air inlet nozzle 43 and a glue feed nozzle 44, which are connected to the mixing channel 39 and the hot melt adhesive hose 42 respectively. The open end of the hot melt adhesive hose 42 is placed below the air inlet nozzle 43. The diameter of the lower end of the mixing channel 39 gradually increases downward to form a trumpet-shaped structure. A plurality of atomizing glue spray holes 45 are provided on the nozzle head, and the atomizing chamber 40 is connected between the mixing channel 39 and the atomizing glue spray holes 45. A lower stirring blade 46 is installed in the atomizing chamber 40, and an upper stirring blade 47 is installed below the mixing channel 39. A connecting shaft is installed in the glue spray head 38, and the upper stirring blade 47 and the lower stirring blade 46 are both rotatably mounted on the connecting shaft. The airflow impacts the upper stirring blades 47 and the lower stirring blades 46, causing them to rotate, thereby more evenly mixing the high-pressure air and the hot melt adhesive. An upper guide plate 48 and a lower guide plate 49 are disposed below the hot melt adhesive tube 42 within the mixing channel 39. The upper and lower guide plates 48 and 49 are offset from each other and tilted downward toward the center of the mixing channel 39. The airflow impacts the upper guide plate 48, causing it to turn rightward, extending its contact time with the hot melt adhesive ejected from the hot melt adhesive tube 42 and improving its ability to break up the hot melt adhesive. The airflow then impacts the lower guide plate 49, further mixing the airflow and breaking up the hot melt adhesive, resulting in an even mixing of the airflow and hot melt adhesive, achieving a good breaking up effect. A plurality of diversion atomization cavities 50 are provided between the atomization chamber 40 and the atomization glue spraying hole 45 on the glue spraying head 38 , and a diversion hole 51 is provided between the diversion atomization cavity 50 and the atomization chamber 40 . Each diversion atomization cavity 50 is connected to at least one atomization glue spraying hole 45 .

[0051] A hot melt adhesive compounding method is operated by a hot melt adhesive compounding device, comprising the following steps: S1, loading a first unwinding material 2 and a second unwinding material 4 on a first unwinding mechanism 1 and a second unwinding mechanism 3, respectively, wherein the first unwinding material 2 is a paper roll and the second unwinding material 4 is a protective film made of non-woven fabric; S2, passing the first unwinding material 2 and the second unwinding material 4 around two squeezing rollers 8 respectively, and combining the first unwinding material 2 and the second unwinding material 4 together and winding them around a winding mechanism 6 for winding; S3, a glue spraying component 9 sprays hot melt adhesive between the first unwinding material 2 and the second unwinding material 4; S4, the two squeezing rollers 8 rotate to extrude the first unwinding material 2 and the second unwinding material 4, and the filamentous hot melt adhesive is compounded between the first unwinding material 2 and the second unwinding material 4 to form a hot melt composite material 10, and at the same time, a glue scraper 7 is close to the outer wall of the squeezing roller 8, and as the squeezing roller 8 rotates, the glue scraper 7 scrapes off the glue on the outer wall of the squeezing roller 8; S5, the winding mechanism 6 winds up the hot melt composite material 10.

[0052] The first unwinding material 2 and the second unwinding material 4 are respectively made of protective films of roll paper and non-woven fabric. During the hot melt adhesive compounding process, the protective film is compounded onto the roll paper, and the protective film of the non-woven fabric can penetrate the hot melt adhesive. During the extrusion process of the first unwinding material 2 and the second unwinding material 4 by the two squeezing rollers 8, the hot melt adhesive penetrates the protective film and remains on the outer wall of the squeezing roller 8. As the squeezing roller 8 rotates, the scraper 7 against the outer wall of the squeezing roller 8 scrapes off the colloid remaining on the outer wall of the squeezing roller 8 to prevent the colloid from forming small solid particles and affecting the adhesive compound strength.

[0053] Example 2: A hot melt adhesive compounding device (see attached Figure 5 , Attachment Figure 6 ),include:

[0054] A first unwinding mechanism 1, on which a first unwinding material 2 is loaded. In this embodiment, the first unwinding material 2 is a paper roll;

[0055] A second unwinding mechanism 3 is loaded with a second unwinding material 4. In this embodiment, the second unwinding material 4 is a protective film made of non-woven fabric;

[0056] Extrusion compounding mechanism 5;

[0057] Winding mechanism 6;

[0058] A scraper 7 and two squeezing rollers 8 are provided on the extrusion composite mechanism 5. The two squeezing rollers 8 are arranged close to each other. The scraper 7 is close to the outer wall of one squeezing roller 8. A glue spraying assembly 9 is provided between the two squeezing rollers 8. The glue spraying assembly 9 is installed at the upper position of the extrusion composite mechanism 5. The first unwinding material 2 and the second unwinding material 4 respectively pass around the two squeezing rollers 8. The glue spraying assembly 9 sprays hot melt adhesive between the first unwinding material 2 and the second unwinding material 4. The first unwinding material 2 and the second unwinding material 4 are squeezed by the two squeezing rollers 8 to form a hot melt composite material 10; the winding mechanism 6 winds up the hot melt composite material 10.

[0059] Several guide rollers 11 are installed on both the first unwinding mechanism 1 and the second unwinding mechanism 3. The first unwinding material 2 passes around the guide rollers 11 and then around a squeeze roller 8. The second unwinding material 4 passes around the guide rollers 11 and then around another squeeze roller 8. Both the first unwinding mechanism 1 and the second unwinding mechanism 3 are equipped with unwinding rollers and several pairs of correction sensors 12. The correction sensors 12 are photoelectric sensors. Each pair of correction sensors 12 is placed on the two side edges of the unwinding material. The spacing between the two correction sensors 12 is set to match the width of the unwinding material. The unwinding rollers can move axially to correct the deviation. When the position of the unwinding material deviates during the unwinding process, the correction sensor 12 can detect the signal and correct the deviation by axially moving the unwinding rollers.

[0060] Both the first unwinding mechanism 1 and the second unwinding mechanism 3 are equipped with an unwinding tensioning assembly, while the rewinding mechanism 6 is equipped with a rewinding tensioning assembly. Both the unwinding tensioning assembly and the rewinding tensioning assembly include a tensioning piston cylinder 13 and a tensioning arm 14. The telescopic rod of the tensioning piston cylinder 13 is rotatably connected to the tensioning arm 14. The tensioning arm 14 is rotatably arranged, and the tensioning piston cylinder 13 is rotatably arranged. A tensioning wheel is mounted on the tensioning arm 14. The tensioning wheels on the two unwinding tensioning assemblies respectively press against the first unwinding material 2 and the second unwinding material 4. The tensioning wheels on the rewinding tensioning assemblies press against the hot-melt composite material 10.

[0061] The first unwinding mechanism 1 is provided with a loading assembly, which includes a support platform 15 and a lifting piston cylinder 16. The upper end of the lifting piston cylinder 16 is rotatably mounted on the first unwinding mechanism 1, and one end of the support platform 15 is rotatably mounted on the first unwinding mechanism 1. A positioning baffle 17 is provided at the other end of the support platform 15. The telescopic rod of the lifting piston cylinder 16 is rotatably connected to the support platform 15.

[0062] The scraper blade 7 is connected to a telescopic mechanism. The thickness of the front end of the scraper blade 7 gradually decreases to form a pointed blade tip. The telescopic mechanism includes a fixed sleeve 18 and an airbag sleeve 19. The airbag sleeve 19 is installed in the fixed sleeve 18. The airbag sleeve 19 is closed at both ends. One end of the airbag sleeve 19 is connected to a vent tube, which is used to inflate and deflate the airbag sleeve 19. A gap exists between the outer wall of the airbag sleeve 19 and the inner wall of the fixed sleeve 18. The fixed sleeve 18 is connected to a telescopic strip 20 that can be telescopically moved. The scraper blade 7 is mounted on the telescopic strip 20. When the airbag sleeve 19 inflates, it bulges outward, thereby pushing the telescopic strip 20 outward. Guide grooves 21 are provided on the side walls of the fixed sleeve 18 and correspond to the telescopic strip 20. The telescopic strip 20 and the guide grooves 21 are slidably connected. A ridge is provided on the inner end of the telescopic strip 20 to prevent the telescopic strip 20 from being pushed away from the fixed sleeve 18. A fine-tuning cavity 22 is provided on the telescopic strip 20, and a slider 23 is provided at one end of the squeegee 7. The slider 23 is slidably mounted within the fine-tuning cavity 22. A positioning spring 24 is mounted within the fine-tuning cavity 22, and the positioning spring 24 abuts against the slider 23. A stepped surface is provided within the fine-tuning cavity 22, and the slider 23 abuts against the stepped surface. The fine-tuning cavity 22 is connected to a high-pressure air pipe 25, and the slider 23 is disposed between the positioning spring 24 and the high-pressure air pipe 25. The high-pressure air pipe 25 introduces high-pressure air into the fine-tuning cavity 22, causing the slider 23 to move toward the positioning spring 24 for fine adjustment.

[0063] The scraper 7 is provided with a plurality of blowing holes 26, which are connected to a high-pressure air inlet pipe 27. This high-pressure air inlet pipe 27 allows for high-pressure airflow. After the scraper 7 removes the colloid remaining on the squeeze roller 8, the airflow from the blowing holes 26 is directed toward the colloid, facilitating its removal from the squeeze roller 8. Furthermore, the airflow facilitates the solidification of the colloid, making it easier for the scraper 7 to remove the solidified colloid.

[0064] Waste trough 28 is provided below the scraper 7. Two scrapers 7 are close on the outer wall of the squeezing roller 8 corresponding to the second unwinding material 4, one scraper 7 is close to the squeezing roller 8 middle position, and the other scraper 7 is close to the squeezing roller 8 lower position.

[0065] A cooling duct 29 and a heating duct 30 are disposed around the squeeze roller 8, which is in contact with the scraper blade 7. The cooling duct 29 faces the lower portion of the outer wall of the squeeze roller 8 and is located in front of the lower scraper blade 7. The heating duct 30 faces the upper portion of the outer wall of the squeeze roller 8 and is located behind the upper scraper blade 7. A cooling airflow is introduced into the cooling duct 29 and sprayed toward the outer wall of the squeeze roller 8, cooling and solidifying any colloid remaining on the outer wall of the squeeze roller 8. The solidified colloid is then more easily scraped off by the scraper blade 7. A heating airflow is introduced into the heating duct 30 and sprayed toward the outer wall of the squeeze roller 8, heating the colloid remaining on the outer wall of the squeeze roller 8 and transforming it into a molten fluid state, thus preventing the formation of solid particles that would affect the adhesive's composite strength.

[0066] A slide 31 is provided below the extrusion roller 8 corresponding to the first unwinding material 2. The extrusion roller 8 is rotatably mounted on the slide 31. The slide 31 is laterally slidably mounted on the extrusion composite mechanism 5. A rotatably mounted screw 32 and a pinion 33 are mounted on the extrusion composite mechanism 5. A screw sleeve 34 is mounted on the slide 31. The screw 32 and the screw sleeve 34 are threadedly adapted. A large toothed disc 35 is mounted on the screw 32. The pinion 33 meshes with the large toothed disc 35 for transmission. The pinion 33 is connected to a turntable 36, and the turntable 36 is connected to a handle 37. The ratio of the diameter of the large toothed disc 35 to the diameter of the pinion 33 is n, n ≥ 10. The handle 37 is held to drive the turntable 36 to rotate, thereby rotating the screw 32 and pushing the slide 31 to move laterally for fine adjustment, thereby achieving fine adjustment of the gap between the two extrusion rollers 8 to adapt to the composite processing of materials of different thicknesses.

[0067] The glue spray assembly 9 includes a glue spray head 38, which is provided with a mixing channel 39 and an atomizing chamber 40. A temperature detector 41 is installed on the glue spray head 38, and the detection head of the temperature detector 41 is placed in the atomizing chamber 40. A hot melt adhesive hose 42 is installed in the mixing channel 39. The glue spray head 38 is provided with an air inlet nozzle 43 and a glue feed nozzle 44, which are connected to the mixing channel 39 and the hot melt adhesive hose 42 respectively. The open end of the hot melt adhesive hose 42 is placed below the air inlet nozzle 43. The diameter of the lower end of the mixing channel 39 gradually increases downward to form a trumpet-shaped structure. A plurality of atomizing glue spray holes 45 are provided on the nozzle head, and the atomizing chamber 40 is connected between the mixing channel 39 and the atomizing glue spray holes 45. A lower stirring blade 46 is installed in the atomizing chamber 40, and an upper stirring blade 47 is installed below the mixing channel 39. A connecting shaft is installed in the glue spray head 38, and the upper stirring blade 47 and the lower stirring blade 46 are both rotatably mounted on the connecting shaft. The airflow impacts the upper stirring blades 47 and the lower stirring blades 46, causing them to rotate, thereby more evenly mixing the high-pressure air and the hot melt adhesive. An upper guide plate 48 and a lower guide plate 49 are disposed below the hot melt adhesive tube 42 within the mixing channel 39. The upper and lower guide plates 48 and 49 are offset from each other and tilted downward toward the center of the mixing channel 39. The airflow impacts the upper guide plate 48, causing it to turn rightward, extending its contact time with the hot melt adhesive ejected from the hot melt adhesive tube 42 and improving its ability to break up the hot melt adhesive. The airflow then impacts the lower guide plate 49, further mixing the airflow and breaking up the hot melt adhesive, resulting in an even mixing of the airflow and hot melt adhesive, achieving a good breaking up effect. A plurality of diversion atomization cavities 50 are provided between the atomization chamber 40 and the atomization glue spraying hole 45 on the glue spraying head 38 , and a diversion hole 51 is provided between the diversion atomization cavity 50 and the atomization chamber 40 . Each diversion atomization cavity 50 is connected to at least one atomization glue spraying hole 45 .

[0068] A hot melt adhesive compounding method is operated by a hot melt adhesive compounding device, comprising the following steps: S1, loading a first unwinding material 2 and a second unwinding material 4 on a first unwinding mechanism 1 and a second unwinding mechanism 3, respectively, wherein the first unwinding material 2 is a paper roll and the second unwinding material 4 is a protective film made of a non-woven fabric; S2, adjusting the gap between the two squeezing rollers 8 to a suitable position, passing the first unwinding material 2 and the second unwinding material 4 around the two squeezing rollers 8 respectively, and winding the first unwinding material 2 and the second unwinding material 4 together on a rewinding mechanism 6 for rewinding; S3, spraying the glue component 9 to the first unwinding mechanism 1 and the second unwinding material 4 on the rewinding mechanism 6 for rewinding; Hot melt adhesive is sprayed between the roll material 2 and the second unwinding material 4; S4, the two squeezing rollers 8 rotate to extrude the first unwinding material 2 and the second unwinding material 4, and the filamentous hot melt adhesive is compounded between the first unwinding material 2 and the second unwinding material 4 to form a hot melt composite material 10. At the same time, the scraper 7 is close to the outer wall of the squeezing roller 8. As the squeezing roller 8 rotates, the scraper 7 scrapes off the colloid on the outer wall of the squeezing roller 8; the cooling pipe 29 and the heating pipe 30 respectively spray low-temperature cooling airflow and high-temperature heating airflow onto the outer wall of the squeezing roller 8; S5, the winding mechanism 6 winds up the hot melt composite material 10.

[0069] The first unwinding material 2 and the second unwinding material 4 are respectively made of protective films of roll paper and non-woven fabric. During the hot melt adhesive compounding process, the protective film is compounded onto the roll paper, and the protective film of the non-woven fabric can penetrate the hot melt adhesive. During the extrusion process of the first unwinding material 2 and the second unwinding material 4 by the two squeezing rollers 8, the hot melt adhesive penetrates the protective film and remains on the outer wall of the squeezing roller 8. As the squeezing roller 8 rotates, the scraper 7 against the outer wall of the squeezing roller 8 scrapes off the colloid remaining on the outer wall of the squeezing roller 8 to prevent the colloid from forming small solid particles and affecting the adhesive compound strength.

[0070] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A hot melt adhesive laminating device comprising: a first unwinding mechanism, on which a first unwinding material is loaded; a second unwinding mechanism, on which a second unwinding material is loaded; Extrusion composite mechanism; Winding mechanism; The invention is characterized in that a scraper and two squeezing rollers are provided on the extrusion laminating mechanism, the scraper is pressed against the outer wall of one squeezing roller, a glue spraying assembly is provided between the two squeezing rollers, a first unwinding material and a second unwinding material are passed around the two squeezing rollers respectively, the glue spraying assembly sprays hot melt adhesive between the first unwinding material and the second unwinding material, and the first unwinding material and the second unwinding material are squeezed by the two squeezing rollers to form a hot melt composite material; a winding mechanism winds up the hot melt composite material; The scraper is connected to the telescopic mechanism, which includes a fixed sleeve and an airbag sleeve. The airbag sleeve is installed in the fixed sleeve, and the fixed sleeve is connected to the telescopic strip that can be telescopically moved. The scraper is installed on the telescopic strip, and the airbag sleeve is inflated to bulge outward, thereby pushing the telescopic strip to move outward; a fine-tuning cavity is provided on the telescopic strip, and a slider is provided at one end of the scraper. The slider is slidably installed in the fine-tuning cavity, and a positioning spring is installed in the fine-tuning cavity. The positioning spring abuts on the slider, and the fine-tuning cavity is connected to the high-pressure air pipe. The high-pressure air pipe introduces high-pressure airflow into the fine-tuning cavity to cause the slider to move toward the direction of the positioning spring for fine-tuning; a number of blowing holes are provided on the scraper, and the blowing holes are connected to the high-pressure air inlet pipe.

2. A hot melt adhesive compounding device according to claim 1, characterized in that: A waste chute is provided below the scraper.

3. A hot melt adhesive compounding device according to claim 1, characterized in that: The first unwinding mechanism and the second unwinding mechanism are both provided with an unwinding tensioning assembly, and the rewinding mechanism is provided with a rewinding tensioning assembly.

4. A hot melt adhesive compounding device according to claim 3, characterized in that: The unwinding tensioning assembly and the rewinding tensioning assembly both include a tensioning piston cylinder and a tensioning arm. The telescopic rod of the tensioning piston cylinder is connected to the tensioning arm. The tensioning arm is rotatably arranged, and a tensioning wheel is installed on the tensioning arm.

5. The hot melt adhesive compounding device according to claim 1, characterized in that: The first unwinding mechanism is equipped with a loading assembly, which includes a support platform and a lifting piston cylinder. One end of the support platform is rotatably mounted on the first unwinding mechanism, and a positioning baffle is provided at the other end of the support platform. The lifting piston cylinder telescopic rod is connected to the support platform.

6. A hot melt adhesive compounding device according to any one of claims 1 to 5, characterized in that: The glue spraying assembly includes a glue spraying head, a mixing flow channel and an atomization chamber are arranged on the glue spraying head, a hot melt glue hose is arranged in the mixing flow channel, an air inlet nozzle and a glue feed nozzle are arranged on the glue spraying head, the air inlet nozzle and the glue feed nozzle are connected to the mixing flow channel and the hot melt glue hose respectively, a plurality of atomization glue spraying holes are arranged on the nozzle head, and the atomization chamber is connected between the mixing flow channel and the atomization glue spraying holes.

7. A hot melt adhesive compounding device according to claim 6, characterized in that: A plurality of diversion atomization cavities are arranged between the atomization chamber and the atomization glue spraying hole on the glue spraying head, and a diversion hole is arranged between the diversion atomization cavity and the atomization chamber, and each diversion atomization cavity is correspondingly connected to at least one atomization glue spraying hole.

8. A hot melt adhesive compounding method, characterized in that: The operation of the hot melt adhesive compounding device according to any one of claims 1 to 7 includes the following steps: S1, loading the first unwinding material and the second unwinding material on the first unwinding mechanism and the second unwinding mechanism respectively; S2, passing the first unwinding material and the second unwinding material around the two extrusion rollers respectively, and combining the first unwinding material and the second unwinding material together and winding them around the winding mechanism for winding; S3, the glue spraying component sprays hot melt adhesive between the first unwinding material and the second unwinding material; S4, the two extrusion rollers rotate to extrude the first unwinding material and the second unwinding material, and the hot melt adhesive is compounded between the first unwinding material and the second unwinding material to form a hot melt composite material, and at the same time, the scraper blade is close to the outer wall of the extrusion roller, and as the extrusion roller rotates, the scraper blade scrapes off the colloid on the outer wall of the extrusion roller; S5, the winding mechanism winds up the hot melt composite material.

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