A nursing pad gluing device for a medical dressing production line

Abstract

The application relates to a nursing pad gluing device for a medical dressing production line, and belongs to the technical field of medical device production equipment, which comprises a first conveyor, a second conveyor, an upper glue spraying assembly and a lower glue spraying assembly, a space is left between the first conveyor and the second conveyor, the upper glue spraying assembly is located above the first conveyor and the second conveyor, the lower glue spraying assembly is located below the first conveyor and the second conveyor, a first compression roller is arranged above the first conveyor and close to the output end of the first conveyor, a second compression roller is arranged above the second conveyor and close to the input end of the second conveyor. The application has the effects of reducing the tearing of the cotton core caused by the glue sticking of the compression roller in the sticking process, preventing the deformation of the material caused by the cooling and solidification of the hot melt glue on the conveying belt, improving the product production quality and reducing the product unqualified rate.

Description

Technical Field

[0001] This application relates to the field of medical device manufacturing equipment technology, and in particular to a nursing pad adhesive device for a medical dressing production line. Background Technology

[0002] In existing medical care pad manufacturing processes, the pad typically consists of a three-layer structure: a cast film, a cotton core, and a non-woven fabric. During production, the cast film and non-woven fabric are usually bonded to the cotton core sequentially. First, one layer (such as the cast film) is bonded to the cotton core; after the cotton core is conveyed a certain distance by a conveyor belt, the next layer (such as the non-woven fabric) is then bonded to it. The bonding method primarily uses pressure rollers or a combination of a conveyor belt and pressure rollers for compaction.

[0003] In this specific structure, the width of the cotton core is smaller than that of the cast film and the nonwoven fabric. If the cast film / nonwoven fabric is conveyed upwards from below on a conveyor belt and bonded to the bottom surface of the cotton core using a pressure roller, the pressure roller presses down on the top surface of the cotton core and the edge of the adhesive-coated surface of the cast film / nonwoven fabric. Because the width of the cotton core is smaller than the width of the adhesive surface, the pressure roller will come into contact with the hot melt adhesive during rotation, and the adhesive may migrate towards its center due to the rotation. When the next cotton core enters the bonding section, the adhesive-coated part of the pressure roller will come into contact with the new cotton core. During the pressing and separating process, the surface of the cotton core is easily torn, resulting in product defects and a high product failure rate.

[0004] If the cast film / nonwoven fabric is conveyed from above to below the conveyor belt for top bonding, the pressure rollers act entirely on the upper surface of the cast film / nonwoven fabric, while the conveyor belt supports the edge of the coated surface and the bottom surface of the cotton core. Although this method avoids the pressure rollers coming into contact with the hot melt adhesive, during the subsequent bottom bonding of the cotton core (i.e., bonding the cast film / nonwoven fabric to the cotton core from the bottom), due to the conveying path and time, the hot melt adhesive may have cooled and solidified on the conveyor belt surface. This can cause excessive stretching or deformation of the material when it leaves the conveyor belt, especially for cast films with poor extensibility, leading to product defects and a high product failure rate.

[0005] To better understand the above situation, specifically, the invention patent disclosed in announcement number CN114368034A, "Production Equipment and Manufacturing Process of Medical Dressings," discloses a method of first conveying non-woven fabric upwards from below a conveyor belt, and then using pressure rollers to achieve bonding with the bottom surface of the cotton core. As can be seen from the accompanying drawings, when the non-woven fabric is laminated with the cotton core, the edge of the coated surface of the non-woven fabric will come into contact with the pressure roller below the cutting device. This causes the surface of the cotton core to tear easily during the pressing and separating process of the non-woven fabric and the cotton core, resulting in product defects. Utility Model Content

[0006] To reduce cotton core tearing caused by adhesive sticking on the pressure rollers during the lamination process, and to prevent material deformation due to the hot melt adhesive cooling and solidifying on the conveyor belt, thereby improving product quality and reducing the product defect rate, this application provides a nursing pad adhesive device for a medical dressing production line.

[0007] The technical solution provided in this application for an adhesive device for a nursing pad in a medical dressing production line is as follows:

[0008] A nursing pad adhesive device for a medical dressing production line includes a first conveyor, a second conveyor, an upper adhesive spraying assembly, and a lower adhesive spraying assembly. A gap is left between the first conveyor and the second conveyor. The upper adhesive spraying assembly is located above the first conveyor and the second conveyor, and the lower adhesive spraying assembly is located below the first conveyor and the second conveyor. A first pressure roller is arranged above the first conveyor and is located near the output end of the first conveyor. A second pressure roller is arranged above the second conveyor and is located near the input end of the second conveyor.

[0009] By adopting the above technical solution, in actual operation, the upper material (such as non-woven fabric or cast film) is sprayed with hot melt adhesive by the upper adhesive spraying assembly and then conveyed to the discharge end of the first conveyor. It then passes through the first pressure roller together with the cotton core conveyed from the first conveyor to complete the lamination process. Because the first pressure roller is close to the end of the first conveyor, the adhesive-sprayed material adheres to the cotton core and quickly detaches from the conveyor belt in a very short time. This effectively avoids the problem of the hot melt adhesive cooling and solidifying during conveying and sticking to the conveyor belt, preventing tearing and deformation caused by poor material detachment. It is particularly effective in protecting cast films with poor extensibility, thereby significantly improving the product's appearance integrity and yield rate.

[0010] Next, the composite cotton core top structure is conveyed to the second conveyor, where the lower layer of material is sprayed with adhesive at the lower adhesive spraying assembly and then bonded to the bottom of the cotton core by the second pressure roller. Since the top of the cotton core is already covered with a layer of material, the second pressure roller will not directly contact the hot melt adhesive during the pressing process, thus avoiding adhesive sticking to the pressure roller and the resulting problems such as tearing of the cotton core and adhesive contamination.

[0011] This device optimizes the material conveying path and pressing position layout, enabling hot melt adhesive to quickly complete bonding and promptly detach from the conveying surface after application. This reduces problems such as adhesive tearing of the cotton core by the pressure roller and adhesive pulling and deformation of the conveyor belt, thereby improving the stability of the composite bonding of nursing pads and the product yield.

[0012] Optionally, a first pre-compression roller is provided on the top surface of the first conveyor, and the first pre-compression roller is farther away from the second conveyor than the first pressure roller.

[0013] By adopting the above technical solution, the first pre-pressing roller performs preliminary pressing immediately after the upper material is sprayed with adhesive, which can make it initially adhere to the cotton core. Therefore, the pressure of the first pressure roller can be reduced, and the hot melt adhesive can be prevented from overflowing laterally due to the one-time high pressure extrusion of the first pressure roller, thereby contaminating the equipment or causing material slippage.

[0014] Optionally, a second preload roller is provided between the first conveyor and the second conveyor, and the second preload roller is tangent to the extended surface of the conveying top surface of the first conveyor.

[0015] By adopting the above technical solution, the second pre-pressing roller can perform preliminary pressing immediately after the lower material is sprayed with adhesive, so that it can achieve preliminary adhesion with the cotton core. Therefore, the pressure of the second pressure roller can be reduced, and the hot melt adhesive can be prevented from overflowing laterally due to one-time high pressure extrusion of the second pressure roller, thereby contaminating the equipment or causing material slippage.

[0016] Optionally, the upper glue spraying assembly includes a distributor and several electrically controlled nozzle modules. The several electrically controlled nozzle modules are on the distributor and connected to each other. The several electrically controlled nozzle modules are arranged along the width direction of the first conveyor. The diversion installation module is equipped with a pump body, which is connected to the melt glue machine through a pipeline. The lower glue spraying assembly has the same structure as the upper glue spraying assembly.

[0017] By adopting the above technical solution, the pump body delivers the hot melt adhesive stored in the melting machine to the distributor. Then, according to the width of the cast film / non-woven fabric, the corresponding position and number of electronically controlled nozzle modules are opened to complete the coating. This design can meet the coating needs of cast films / non-woven fabrics of various widths and has strong adaptability.

[0018] Optionally, the glue spraying assembly further includes a baffle, the width of which is the same as the width of the dispenser, and the output end of the electronically controlled nozzle module is disposed opposite to the baffle.

[0019] By adopting the above technical solution, the baffle can prevent hot melt adhesive from being sprayed onto other equipment and causing contamination.

[0020] Optionally, a scraper assembly is provided at the bottom of the first conveyor, the scraper assembly being used to scrape off the solidified hot melt adhesive on the first conveyor.

[0021] By adopting the above technical solution, since the hot melt adhesive on the edge of the coating surface of the upper material will adhere to the first conveyor, although most of the hot melt adhesive adhering to the first conveyor has solidified after being conveyed and moved a long distance by the first conveyor, the new cotton core still has a small probability of sticking to the hot melt adhesive on the first conveyor. The scraper assembly can completely scrape off the hot melt adhesive on the first conveyor, avoiding the situation where the core is still sticking to the hot melt adhesive on the first conveyor, which is conducive to further preventing the cotton core from being pulled and further reducing the product defect rate.

[0022] Optionally, the scraper assembly includes a scraper blade with a width equal to the width of the conveyor belt of the first conveyor. The scraper blade is located at the end of the first conveyor away from the second conveyor and at the bottom of the first conveyor.

[0023] Optionally, the bottom of the first conveyor is provided with a plurality of jet nozzles, which are used to deliver gas to the conveyor belt at the bottom of the first conveyor.

[0024] By adopting the above technical solution, the jet nozzle can ensure that the hot melt adhesive on the first conveyor is completely solidified, which is beneficial for the scraper to completely remove the hot melt adhesive stuck to the first conveyor.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. By optimizing the material conveying path and pressing position layout, this device achieves the goal of quickly completing the bonding of hot melt adhesive after application and timely detaching it from the conveying surface. This reduces the problems of adhesive tearing of the cotton core by the pressure roller and adhesive pulling and deformation of the conveyor belt, thereby improving the stability of the composite bonding of nursing pads and the product yield.

[0027] 2. The design of the first and second pre-pressure rollers allows for initial pressing of the upper and lower materials immediately after adhesive spraying, enabling them to initially adhere to the cotton core. This reduces the pressure on the first and second pressure rollers, preventing the hot melt adhesive from overflowing laterally due to one-time high-pressure extrusion, which could contaminate the equipment or cause material slippage.

[0028] 3. The scraper assembly can completely scrape off the hot melt adhesive on the first conveyor, preventing the core from still being stuck to the hot melt adhesive on the first conveyor. This helps to further prevent the cotton core from being pulled and further reduce the product defect rate. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0030] Figure 2 This is a schematic diagram of the scraper assembly used in Embodiment 2 of this application.

[0031] Explanation of reference numerals in the attached drawings: 1. Workbench; 2. First conveyor; 3. Second conveyor; 41. First pre-compression roller; 42. First pressure roller; 43. First guide roller; 51. Second pre-compression roller; 52. Second pressure roller; 53. Second guide roller; 6. Upper glue spraying assembly; 61. Distributor; 62. Electrically controlled nozzle module; 63. Pump body; 7. Lower glue spraying assembly; 8. Baffle; 9. Scraper assembly; 91. Scraper; 92. Air nozzle. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0033] Example 1

[0034] Embodiment 1 of this application discloses a nursing pad adhesive device for a medical dressing production line.

[0035] like Figure 1 The nursing pad adhesive device for a medical dressing production line includes a workbench 1, on which a first conveyor 2 and a second conveyor 3 are mounted. Both the first conveyor 2 and the second conveyor 3 are negative pressure conveyors, which can reduce the possibility of cotton core misalignment during transport. A discharge space is provided between the first conveyor 2 and the second conveyor 3. The workbench 1 is rotatably connected to a first pre-pressure roller 41 and a first pressure roller 42 via mounting brackets. The first pressure roller 42 is positioned near the conveying end of the first conveyor 2 and is located above the first conveyor 2. The first pre-pressure roller 41 is located above the first conveyor 2 and is further away from the second conveyor 3 than the first pressure roller 42. The workbench 1 is rotatably connected to a second pre-pressure roller 51 and a second pressure roller 52 via two other mounting brackets. The second pre-pressure roller 51 is located in the space between the first conveyor 2 and the second conveyor 3, and the extended surfaces of the conveying surfaces of both the first conveyor 2 and the second conveyor 3 are tangent to the second pre-pressure roller 51. The second pressure roller 52 is located above the second conveyor 3 and is positioned near the input end of the second conveyor 3. The second pressure roller 52 is located between the second pre-pressure roller 51 and the input end of the second conveyor 3.

[0036] An upper glue spraying assembly 6 and a lower glue spraying assembly 7 are installed on the workbench 1. The upper glue spraying assembly 6 is located above the first conveyor 2 and the second conveyor 3, and the lower glue spraying assembly 7 is located below the first conveyor 2 and the second conveyor 3. The upper glue spraying assembly 6 and the lower glue spraying assembly 7 have the same structure. The upper glue spraying assembly 6 includes a distributor 61 and several electrically controlled nozzle modules 62. The distributor 61 is installed on the workbench 1, and the several electrically controlled nozzle modules 62 are bolted to and connected to the distributor 61. The several electrically controlled nozzle modules 62 are arranged at equal intervals along the length of the distributor 61. Pump bodies 63 are installed at both ends of the top of the distributor 61, and the two pump bodies 63 are connected to the hot melt machine through a diversion pipe. The distributor 61 and the electrically controlled nozzle modules 62 are inclined, so that the discharge end of the electrically controlled nozzle modules 62 is inclined towards the second conveyor 3. A baffle 8 is installed on the workbench 1. The baffle 8 is inclined and is positioned opposite to the discharge end of the electrically controlled nozzle modules 62. A first guide roller 43 is rotatably connected to the workbench 1. The first guide roller 43 is tangential to the extended surface of the baffle 8 of the upper glue spraying assembly 6 facing the electronically controlled nozzle module 62.

[0037] The nozzle of the electrically controlled nozzle module 62 of the lower glue spraying assembly 7 is set in a near-horizontal position, and the nozzle of the electrically controlled nozzle module 62 of the lower glue spraying assembly 7 is set towards the second conveyor 3. A second guide roller 53 is rotatably connected to the worktable 1, and the second guide roller 53 is tangential to the extended surface of the baffle 8 of the lower glue spraying assembly 7 facing the electrically controlled nozzle module 62. The second guide roller 53 is located below the baffle 8.

[0038] In this embodiment, the upper material is a cast film, which is sprayed with adhesive by the upper adhesive spraying assembly 6, and then the cast film passes sequentially through the first guide roller 43, the first pre-pressure roller 41, and the first pressure roller 42. The lower material is a non-woven fabric, which passes sequentially through the second guide roller 53, the second pre-pressure roller 51, and the first pressure roller 42. The cotton core is cut at the feed end of the first conveyor 2 and then equidistantly conveyed to the first conveyor 2.

[0039] The implementation principle of this application embodiment is as follows: After the non-woven fabric is sprayed with hot melt adhesive by the top spraying assembly 6, it is conveyed to the discharge end of the first conveyor 2 and, together with the cotton core conveyed from the first conveyor 2, passes through the first pressure roller 42 to complete the lamination. Since the first pressure roller 42 is close to the end of the first conveyor 2, the adhesive-coated material adheres to the cotton core and quickly detaches from the conveyor belt in a very short time. This effectively avoids the problem of the hot melt adhesive cooling and solidifying during the conveying process and sticking to the conveyor belt, preventing tearing and deformation caused by poor material detachment. In particular, it has a good protective effect on cast film with poor extensibility, thereby significantly improving the product's appearance integrity and pass rate.

[0040] Afterwards, the composite cotton core top structure is conveyed to the second conveyor 3, where non-woven fabric is sprayed with adhesive at the lower adhesive spraying assembly 7, and then bonded to the bottom of the cotton core by the second pressure roller 52. Since the top of the cotton core is already covered with a cast film, the second pressure roller 52 will not directly contact the hot melt adhesive during the pressing process, thus avoiding the phenomenon of adhesive sticking to the pressure roller and the resulting problems such as tearing of the cotton core and adhesive contamination.

[0041] This device optimizes the material conveying path and pressing position layout, enabling hot melt adhesive to quickly complete bonding and promptly detach from the conveying surface after application. This reduces problems such as adhesive tearing of the cotton core by the pressure roller and adhesive pulling and deformation of the conveyor belt, thereby improving the stability of the composite bonding of nursing pads and the product yield.

[0042] Example 2

[0043] Reference Figure 2 The difference between this embodiment and Embodiment 1 is that a scraper assembly 9 is provided at the bottom of the first conveyor 2. The scraper assembly 9 is used to scrape off the solidified hot melt adhesive on the first conveyor 2. The scraper assembly 9 includes a scraper 91, which is fixed on the worktable 1. The width of the scraper 91 is the same as the width of the conveyor belt of the first conveyor 2. The scraper 91 is located at the end of the first conveyor 2 away from the second conveyor 3 and at the bottom of the first conveyor 2. A plurality of air nozzles 92 are provided at the bottom of the first conveyor 2 and are fixed on the worktable 1. The air nozzles 92 are arranged at equal intervals along the width direction of the first conveyor 2. The air nozzles 92 can be connected to an air pump to deliver gas to the conveyor belt at the bottom of the first conveyor 2. The air nozzles 92 are located at the center of the bottom of the first conveyor 2. In other embodiments, the scraper assembly 9 can also be a spring blade. The spring blade abuts against the bottom of the first conveyor 2.

[0044] The implementation principle of Example 2 is as follows: Since the hot melt adhesive on the edge of the coating surface of the upper material will adhere to the first conveyor 2, although most of the hot melt adhesive adhering to the first conveyor 2 has solidified after being conveyed and moved a long distance by the first conveyor 2, the new cotton core still has a small probability of sticking to the hot melt adhesive on the first conveyor 2. The scraper assembly 9 can completely scrape off the hot melt adhesive on the first conveyor 2, avoiding the situation where the core is still sticking to the hot melt adhesive on the first conveyor 2, which is conducive to further preventing the cotton core from being pulled and further reducing the product defect rate.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A nursing pad adhesive device for a medical dressing production line, characterized in that: The assembly includes a first conveyor (2), a second conveyor (3), an upper glue spraying assembly (6), and a lower glue spraying assembly (7). There is a gap between the first conveyor (2) and the second conveyor (3). The upper glue spraying assembly (6) is located above the first conveyor (2) and the second conveyor (3). The lower glue spraying assembly (7) is located below the first conveyor (2) and the second conveyor (3). A first pressure roller (42) is provided above the first conveyor (2) and is located near the output end of the first conveyor (2). A second pressure roller (52) is provided above the second conveyor (3) and is located near the input end of the second conveyor (3).

2. The adhesive device for nursing pads in a medical dressing production line according to claim 1, characterized in that: The top surface of the first conveyor (2) is provided with a first pre-pressure roller (41), which is further away from the second conveyor (3) than the first pressure roller (42).

3. The adhesive device for nursing pads in a medical dressing production line according to claim 1, characterized in that: A second preload roller (51) is provided between the first conveyor (2) and the second conveyor (3), and the second preload roller (51) is tangent to the extended surface of the conveying top surface of the first conveyor (2).

4. The adhesive device for nursing pads in a medical dressing production line according to claim 1, characterized in that: The upper glue spraying assembly (6) includes a distributor (61) and several electrically controlled nozzle modules (62). The several electrically controlled nozzle modules (62) are on the distributor (61) and connected to each other. The several electrically controlled nozzle modules (62) are arranged along the width direction of the first conveyor (2). The distributor (61) is equipped with a pump body (63). The pump body (63) is connected to the melt glue machine through a pipeline. The lower glue spraying assembly (7) has the same structure as the upper glue spraying assembly (6).

5. The adhesive device for nursing pads in a medical dressing production line according to claim 4, characterized in that: The glue spraying assembly (6) also includes a baffle (8), the width of which is the same as the width of the dispenser (61), and the output end of the electronically controlled nozzle module (62) is arranged opposite to the baffle (8).

6. The adhesive device for nursing pads in a medical dressing production line according to claim 1, characterized in that: The bottom of the first conveyor (2) is provided with a scraper assembly (9), which is used to scrape off the solidified hot melt adhesive on the first conveyor (2).

7. The adhesive device for nursing pads in a medical dressing production line according to claim 6, characterized in that: The scraper assembly (9) includes a scraper (91) with the same width as the conveyor belt width of the first conveyor (2). The scraper (91) is located at the end of the first conveyor (2) away from the second conveyor (3) and at the bottom of the first conveyor (2).

8. The adhesive device for nursing pads in a medical dressing production line according to claim 7, characterized in that: The bottom of the first conveyor (2) is provided with a plurality of jet nozzles (92), which are used to deliver gas to the conveyor belt at the bottom of the first conveyor (2).

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