A glue storage and guiding integrated rubber band lip scraping device

Abstract

The utility model relates to the technical field of glue solution delivery, and specifically discloses a glue storage and guiding integrated rubber band scraping lip, which comprises a rear lip piece, an intermediate piece and a front lip piece, the intermediate piece is integrated with glue outlet holes, glue storage grooves and guide grooves, and the three are integrally processed and formed to ensure high relative position accuracy. The glue outlet holes are located at the center of the glue storage grooves and are communicated with the guide grooves through communication grooves. The rear lip piece is provided with glue storage cavities and a plurality of glue inlet holes. The glue inlet holes are communicated with the glue outlet holes on the intermediate piece. The layers are detachably connected and accurately positioned through positioning columns, positioning protrusions and positioning grooves. The utility model effectively solves the flow channel misplacement problem of traditional scraping lips caused by split processing through integrated structure design, realizes uniform and efficient coating of the rubber band, significantly reduces the amount of glue used, and uses the central glue outlet hole design to cooperate with the valve body back-pumping function to effectively prevent glue from flowing out during shutdown, thereby improving product quality and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of adhesive conveying technology, specifically to an integrated rubber band scraper lip for storing and guiding adhesive. Background Technology

[0002] In the manufacturing process of hygiene products (such as diapers and sanitary napkins), elastic bands are typically bonded to substrates such as non-woven fabrics using hot melt adhesive. During this process, the elastic band scraper is a key device for achieving adhesive application, and its performance directly affects the bonding effect of the elastic band, the softness of the product, and the yield rate.

[0003] Existing rubber band scraper lips mostly use independent scraper nozzles with fixed widths, typically 25mm or 28.6mm. In actual production, to meet the specific requirements of different products regarding the number and spacing of rubber bands, multiple independent scraper nozzles are usually combined side-by-side. This combined structure has obvious limitations. First, its glue dispensing width is limited by the width of a single scraper nozzle, making it difficult to flexibly adapt to wider or more specialized rubber band layouts. Second, multiple scraper nozzles are prone to misalignment and uneven splicing during installation, resulting in discontinuous glue lines or uneven glue distribution, affecting the bonding quality.

[0004] In addition, in existing technologies, the cavity and dispensing hole that realize the functions of glue storage and guiding are often located on different parts. For example, the dispensing hole is located on the rear lip, while the glue storage tank and guiding groove are located on the middle piece, assembled together. This split design makes it difficult to guarantee the relative positional accuracy between critical channels such as the dispensing hole and the glue storage tank due to machining errors and cumulative assembly errors. Misalignment is prone to occur, thus affecting the stable flow and uniform distribution of the glue. Furthermore, since the dispensing hole is not located inside the glue storage tank, when the matching dispensing valve stops working and performs back suction, the glue residue in the glue storage tank cannot be effectively drawn back, causing glue to drip from the scraper lip onto the product material below, resulting in contamination and production defects.

[0005] Therefore, there is an urgent need in this field for a new type of rubber band scraper that can overcome the processing and assembly precision problems of the above-mentioned split structure, ensure the precise alignment of the adhesive flow path, and effectively prevent adhesive outflow during machine stoppage, so as to meet the diverse and high-precision production needs. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides an integrated rubber band scraper lip for storing and guiding adhesive, which can solve the aforementioned problems.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an integrated rubber band scraper lip for storing and guiding adhesive, comprising a rear lip, a middle lip, and a front lip. The middle lip integrates an adhesive outlet hole, an adhesive storage groove, and a guide groove. The adhesive outlet hole communicates with the adhesive storage groove, and the adhesive storage groove communicates with the guide groove. The adhesive outlet hole, the adhesive storage groove, and the guide groove together with the middle lip form an integrated structure.

[0008] The above technical solution involves designing an integrated glue outlet, glue storage tank, and guide groove on the intermediate sheet, which ensures high relative positional accuracy between the components. This fundamentally solves the problem of flow channel misalignment caused by accumulated errors in processing and assembly in traditional split structures, and ensures the accuracy and stability of the glue flow path.

[0009] Furthermore, the dispensing hole is located at the center of the glue storage tank.

[0010] By placing the dispensing hole at the center of the glue reservoir, the glue can be evenly distributed from the center outwards, achieving comprehensive and uniform coverage of the elastic band. This effectively reduces glue usage while maintaining the same or even better bonding strength, lowering material costs and resulting in a softer, more comfortable final product.

[0011] Furthermore, the intermediate sheet is also provided with a connecting groove, and multiple glue outlet holes are provided, with the connecting groove communicating with the multiple glue outlet holes.

[0012] Furthermore, a glue storage cavity is provided in the lower region of the rear lip, and multiple glue inlet holes are also provided on the rear lip.

[0013] By incorporating a glue storage chamber in the rear lip and connecting it to multiple glue inlets, glue from an external glue supply system can be temporarily stored, thus balancing and stabilizing the pressure. Even if there are slight pressure fluctuations in individual glue supply channels, the glue in the storage chamber can compensate for the differences through its own flow, providing a basis for subsequent uniform glue dispensing.

[0014] Furthermore, the glue storage cavity is connected to multiple glue inlet holes, and the glue inlet holes are connected to glue outlet holes.

[0015] Furthermore, it also includes positioning posts, which are disposed on the rear lip and pass through the middle lip and the front lip in sequence. The positioning posts are used to constrain the offset of the middle lip and the front lip.

[0016] Furthermore, the rear lip, middle lip, and front lip are detachably connected by positioning protrusions and positioning grooves.

[0017] Furthermore, the guide groove is used to guide the elastic band and position the elastic band directly below the glue reservoir.

[0018] This utility model has the following beneficial effects: Firstly, in this utility model, by designing an integrally formed glue outlet, glue storage tank and guide groove on the intermediate plate, a high relative positional accuracy between the components is ensured, fundamentally solving the problem of flow channel misalignment caused by the cumulative errors in processing and assembly of traditional split structures, and ensuring the accuracy and stability of the glue flow path.

[0019] Secondly, in this invention, by placing the glue outlet at the center of the glue storage tank, the glue can be evenly filled from the center outwards, thus achieving comprehensive and uniform coverage of the elastic band. This effectively reduces the amount of glue used while achieving the same or even better bonding strength, lowering material costs and resulting in a softer final product with improved wearing comfort.

[0020] Thirdly, in this invention, by setting a glue storage cavity on the rear lip and connecting it to multiple glue inlet holes, it is possible to temporarily store the glue from the external glue supply system, thereby balancing and stabilizing the pressure. Even if there are slight pressure fluctuations in individual glue supply channels, the glue in the storage cavity can compensate for the differences through its own flow, providing a basis for subsequent uniform glue dispensing.

[0021] Fourth, in this utility model, when the matching glue dispensing valve stops working, it performs reverse suction of glue. Since the glue dispensing hole is directly located inside the glue storage tank, the reverse suction force can efficiently act on the residual glue in the glue storage tank, sucking back most of it. This significantly reduces the risk of glue dripping from the guide tank onto the product after the machine stops, and effectively reduces the scrap rate generated as a result. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram illustrating the combination of the rear lip piece, the middle piece, and the front lip piece in this utility model; Figure 3 This is a partial structural schematic diagram of the present invention; Figure 4 for Figure 3 Enlarged view of point A in the image; Figure 5 This is a schematic diagram of the structure of the intermediate piece in this utility model; Figure 6 This is a partial structural diagram of the intermediate piece in this utility model; Figure 7 for Figure 6 Enlarged view of point B in the image.

[0023] The components are: 1. Rear lip piece; 2. Middle piece; 3. Front lip piece; 4. Positioning post; 5. Guide groove; 6. Positioning protrusion; 7. Positioning groove; 8. Glue storage cavity; 9. Glue inlet hole; 10. Glue outlet hole; 11. Glue storage tank; 12. Connecting groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-7 This utility model provides a technical solution: an integrated rubber band scraper lip for storing and guiding glue, including a rear lip 1, a middle lip 2 and a front lip 3. The middle lip 2 integrates a glue outlet 10, a glue storage groove 11 and a guide groove 5. The glue outlet 10 is connected to the glue storage groove 11, and the glue storage groove 11 is connected to the guide groove 5. The glue outlet 10, the glue storage groove 11 and the guide groove 5 together with the middle lip 2 form an integrated structure.

[0026] In this utility model, the three main components, namely the glue outlet 10, the glue storage tank 11, and the guide groove 5, are located on the middle piece 2 and together form a compact scraping lip structure that can achieve precise glue guiding, glue storage, and rubber band guidance.

[0027] The intermediate piece 2 is the core component of this embodiment. The intermediate piece 2 integrates a glue dispensing hole 10, a glue storage tank 11, and a guide groove 5. Crucially, the glue dispensing hole 10, the glue storage tank 11, and the guide groove 5 are formed on the intermediate piece 2 through a single clamping and machining process. This integrated structure ensures high dimensional accuracy in the relative positions of the glue dispensing hole 10, the glue storage tank 11, and the guide groove 5, avoiding misalignment problems caused by accumulated errors in the machining and assembly of multiple parts in traditional split designs.

[0028] like Figures 3-7 As shown, the glue outlet 10 is preferably located at the center of the glue storage tank 11. After the glue flows out of the glue outlet 10, it can evenly fill the entire glue storage tank 11. The glue storage tank 11 is connected to the guide groove 5, so that the glue in the glue storage tank 11 can flow smoothly to the guide groove 5. The guide groove 5 is used to guide the elastic band and position the elastic band directly below the glue storage tank 11. When the glue flows out from the guide groove 5, it can be evenly coated on the elastic band located directly below the glue storage tank 11, ensuring the uniformity of glue coating.

[0029] like Figures 3-7As shown, the intermediate piece 2 is also provided with a connecting groove 12, and multiple glue outlet holes 10 are provided. The connecting groove 12 is connected to the multiple glue outlet holes 10. A glue storage cavity 8 is opened in the lower area of ​​the rear lip piece 1, and multiple glue inlet holes 9 are also provided on the rear lip piece 1. The glue storage cavity 8 is connected to the multiple glue inlet holes 9, and the glue inlet holes 9 are connected to the glue outlet holes 10. In actual assembly, the glue inlet holes 9 of the rear lip piece 1 correspond to and are connected to the glue outlet holes 10 of the intermediate piece 2. External glue enters the glue storage cavity 8 through the glue inlet holes 9 through the glue supply system (the glue supply system can be a matching glue outlet valve, not shown in the figure), and then enters each glue outlet hole 10 through the connecting groove 12, and finally is injected into the glue storage tank 11 on the intermediate piece 2.

[0030] By providing a glue storage cavity 8 on the rear lip plate 1 and connecting it to multiple glue inlet holes 9, glue from the external glue supply system can be temporarily stored, thus balancing and stabilizing the pressure. Even if there are slight pressure fluctuations in individual glue supply channels, the glue in the storage cavity 8 can compensate for the differences through its own flow, providing a basis for subsequent uniform glue dispensing.

[0031] like Figures 1-3 As shown, in order to ensure that the rear lip 1, the middle lip 2 and the front lip 3 have precise relative positions after assembly, this utility model is provided with a multi-positioning structure.

[0032] First, a positioning post 4 is provided on the rear lip piece 1, which passes through corresponding through holes on the intermediate piece 2 and the front lip piece 3. The positioning post 4 effectively constrains the lateral and longitudinal offset of the intermediate piece 2 and the front lip piece 3, ensuring that the holes and grooves on each layer are always precisely aligned. Second, the rear lip piece 1, the intermediate piece 2, and the front lip piece 3 are detachably connected by positioning protrusions 6 and positioning grooves 7. This concave-convex mating structure further ensures the alignment and overall stability of the assembly, while also facilitating maintenance, disassembly, and cleaning.

[0033] The working principle of this invention is as follows: During operation, the elastic band (not shown in the figure) is confined within the guide groove 5 and precisely positioned directly below the glue storage tank 11. The adhesive flows sequentially through: the glue inlet 9, the glue storage cavity 8, the connecting groove 12, the glue outlet 10, the glue storage tank 11, and the guide groove 5. Finally, the adhesive flows from the guide groove 5 and coats the elastic band passing beneath it, thus completing the adhesive coating on the elastic band.

[0034] Since the glue outlet 10 is located in the center of the glue storage tank 11, the glue can evenly and completely coat the elastic band. A stronger bonding force can be achieved with less glue, which saves costs and makes the final product (such as diapers) softer due to the reduced amount of glue used.

[0035] When the matching glue supply system (the glue supply system can be a matching glue outlet valve, not shown in the figure) has a back-pull function and is activated when the work is stopped, since the glue outlet 10 is directly opened in the center of the glue storage tank 11, the back-pull suction can effectively draw back most of the glue liquid remaining in the glue storage tank 11, thereby significantly reducing the risk of glue dripping from the guide groove 5 onto the product material due to its own weight, and reducing the defect rate.

[0036] In summary, this utility model fundamentally solves the problems of misalignment and glue dripping caused by the split structure and assembly error of traditional rubber band coating by integrating the glue outlet 10, glue storage tank 11 and guide groove 5 into the intermediate piece 2 and forming it as a whole. This achieves high precision, high efficiency and low loss of rubber band coating operation.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rubber band scraper lip with integrated adhesive storage and guiding function, characterized in that, It includes a rear lip piece (1), a middle piece (2) and a front lip piece (3). The middle piece (2) has an adhesive outlet (10), an adhesive storage tank (11) and a guide groove (5) integrated on it. The adhesive outlet (10) is connected to the adhesive storage tank (11), and the adhesive storage tank (11) is connected to the guide groove (5). The adhesive outlet (10), the adhesive storage tank (11) and the guide groove (5) together with the middle piece (2) form an integrated structure.

2. The integrated rubber band scraper lip for storing and guiding adhesive according to claim 1, characterized in that, The glue outlet (10) is located at the center of the glue storage tank (11).

3. The integrated rubber band scraper lip for storing and guiding adhesive according to claim 1, characterized in that, The intermediate sheet (2) is also provided with a connecting groove (12), and multiple glue outlet holes (10) are provided. The connecting groove (12) is connected to multiple glue outlet holes (10).

4. The integrated rubber band scraper lip for storing and guiding adhesive according to claim 1, characterized in that, The lower region of the rear lip (1) is provided with a glue storage cavity (8), and the rear lip (1) is also provided with a plurality of glue inlet holes (9).

5. The integrated rubber band scraper lip for storing and guiding adhesive according to claim 4, characterized in that, The glue storage cavity (8) is connected to multiple glue inlet holes (9), and the glue inlet holes (9) are connected to glue outlet holes (10).

6. The integrated rubber band scraper lip for storing and guiding adhesive according to claim 1, characterized in that, It also includes a positioning post (4), which is disposed on the rear lip (1) and passes through the middle piece (2) and the front lip (3) in sequence. The positioning post (4) is used to constrain the offset of the middle piece (2) and the front lip (3).

7. The integrated rubber band scraper lip for storing and guiding adhesive according to claim 1, characterized in that, The rear lip (1), middle lip (2) and front lip (3) are detachably connected by positioning protrusions (6) and positioning grooves (7).

8. The integrated rubber band scraper lip for storing and guiding adhesive according to claim 1, characterized in that, The guide groove (5) is used to guide the rubber band and position the rubber band directly below the rubber storage tank (11).

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