A glue blocking device and method for a glue roller

Abstract

The present application relates to the technical field of gluing, and discloses a glue blocking device and method for a gluing roller, which comprises glue blocking blocks arranged at the ends of two gluing rollers to block the two ends of a glue groove, further comprises a medium inlet channel, one end of the medium inlet channel is communicated with a conveying pump, the other end of the medium inlet channel is communicated into a gap between the glue blocking blocks and the roller surface of the gluing roller, and the conveying pump is used for conveying medium into the medium inlet channel. The present application can solve the problem of the existing glue blocking structure and method that the glue blocking is not strict, which can cause the increase of the coating amount.

Description

Technical Field

[0001] This invention relates to the field of adhesive coating technology, and more specifically to an adhesive blocking device and method for an adhesive coating roller. Background Technology

[0002] The existing glue coating machine includes two coating rollers: a glue storage roller and a screen metering roller. These two rollers are arranged parallel to each other with a slight gap between their surfaces. Glue-blocking blocks are installed at both ends of the rollers to seal them. A glue trough with an open top is formed between the glue storage roller, the screen metering roller, and the glue-blocking blocks at both ends, used to store the glue for coating. During the coating operation, the screen metering roller rotates, transferring the glue from the trough to the coating roller, which then applies the glue to the substrate, thus coating the substrate.

[0003] The aforementioned adhesive-blocking structure has significant technical defects when using non-Newtonian fluid adhesives for coating production: During the rotation of the two rollers, friction between the roller surface and the adhesive block generates frictional heat. This heat accelerates the evaporation of ethyl ester solvent in the adhesive between the roller surface and the adhesive block. Solvent loss directly causes a sharp increase in the viscosity of the adhesive within this gap. The increased viscosity further intensifies the friction between the roller surface and the adhesive block, creating a vicious cycle of "heat generation—solvent evaporation—viscosity increase—intensified friction." On one hand, the continuously increasing friction rapidly wears down the adhesive block, causing seal failure at both ends and resulting in adhesive leakage and incomplete adhesive application. On the other hand, the dried adhesive residue accumulated in the roller gap area after solvent evaporation increases the gap between the rollers, leading to a greater amount of adhesive carried away by the metering roller. Ultimately, this results in an increased amount of adhesive coating on the substrate surface, affecting the product coating quality. Summary of the Invention

[0004] The present invention aims to provide a glue-blocking device and method for a coating roller to solve the problem that the existing glue-blocking structure does not block the glue properly, which leads to an increase in the coating amount.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A glue-blocking device for a glue-applying roller includes glue-blocking blocks disposed at the ends of two glue-applying rollers for sealing both ends of the glue groove, and a medium inlet channel. One end of the medium inlet channel is connected to a delivery pump, and the other end of the medium inlet channel is connected to the gap between the glue-blocking blocks and the roller surface of the glue-applying roller. The delivery pump is used to introduce medium into the medium inlet channel.

[0006] Preferably, as an improvement, the end of the coating roller is provided with a glue removal mechanism, which is used to scrape off the glue overflowing on the coating roller.

[0007] Preferably, as an improvement, the adhesive removal mechanism includes a roller surface scraper and an end face scraper, the roller surface scraper contacting the roller surface of the coating roller, and the end face scraper contacting the end face of the coating roller, and also includes an adhesive receiving tray disposed below the coating roller.

[0008] Preferably, as an improvement, the adhesive removal mechanism includes a wiping roller, the roller surface of which contacts the roller surface of the adhesive coating roller.

[0009] Preferably, as an improvement, the medium inlet channel includes a main channel disposed within the adhesive block, the top end of the main channel being connected to the delivery pump, and the bottom end of the main channel being connected to two branch channels, which are respectively connected to the gaps between the two coating rollers and the adhesive block.

[0010] Preferably, as an improvement, the rubber block is connected to an adjustment mechanism.

[0011] Preferably, as an improvement, the adjustment mechanism includes a mounting bracket with an adjustment bolt threaded through it. A positioning nut is threaded onto the adjustment bolt and presses against the top of the mounting bracket. The bottom end of the adjustment bolt is detachably connected to the main channel. The adjustment bolt is hollow inside and communicates with the main channel.

[0012] A glue-blocking method for a glue-coating roller, employing the aforementioned glue-blocking device for a glue-coating roller, involves a delivery pump continuously and uniformly pumping the medium into the medium inlet channel throughout the entire glue coating operation. The amount of medium introduced is calculated based on the rotation speed of the glue-coating roller, the glue temperature, the ambient temperature, and the glue concentration.

[0013] Preferably, as an improvement, the amount of medium introduced satisfies the following formula: .

[0014] Preferably, as an improvement, the medium is a gas or a solvent contained in an adhesive.

[0015] The effects of this invention are: 1. This invention provides a medium inlet channel to pump a medium between the glue-blocking block and the coating roller surface. The medium can be gas or a solvent in the glue. When gas is pumped in, an air film is formed in the gap between the glue-blocking block and the coating roller surface, directly isolating the glue and preventing it from entering the gap. This fundamentally solves the problem of glue leakage and increased coating amount caused by solvent evaporation due to frictional heat. When solvent is pumped in, the evaporated solvent in the glue can be replenished, also solving the problem of glue leakage and increased coating amount caused by solvent evaporation.

[0016] 2. The pumping rate of the medium is calculated based on the rotation speed of the coating roller, the temperature of the glue, the ambient temperature, and the concentration of the glue, so as to control the appropriate pumping rate. This can solve the problems of glue leakage caused by increased friction due to glue evaporation and increased coating amount, while avoiding the problem of excessive medium mixing into the glue and affecting the glue.

[0017] 3. By calculating the pumping volume of the medium based on the rotation speed of the coating roller, the temperature of the glue, the ambient temperature, and the concentration of the glue, the amount of medium can be dynamically adjusted under different processing conditions, adapting to different processing needs and conditions, and expanding the scope of application.

[0018] 4. The medium inlet channel can be external or internal, but it is preferred to be internally installed inside the glue block. It consists of a main channel and a branch channel built into the glue block. The main channel is connected to the delivery pump, and the branch channels introduce the medium into the gap between the two coating rollers and the glue block. The internal structure can effectively avoid problems such as channel interference and unsightly appearance.

[0019] 5. When the metering roller rotates relative to the glue storage roller, the glue-blocking block located between the two glue-applying rollers is easily pulled downwards by the rotational force, thereby reducing the gap between the glue-blocking block and the glue-applying roller surface and increasing friction. This solution uses a positioning nut to suspend the adjusting bolt on the mounting bracket. The adjusting bolt is detachably connected to the glue-blocking block. This not only limits the position of the glue-blocking block to prevent it from being pulled downwards, but also adjusts the height of the glue-blocking block to meet different processing requirements. Furthermore, the adjusting bolt is hollow inside and connects to the main channel on the glue-blocking block, making it not only a limiting and adjusting component for the glue-blocking block, but also a connecting component between the medium inlet channel and the delivery pump.

[0020] 6. This invention also includes a glue removal mechanism to scrape off a small amount of glue overflowing onto the coating roller from the gap between the glue-blocking block and the coating roller. This prevents the glue from becoming stale and mixing into the gap between the glue-blocking block and the coating roller as the coating roller rotates. Specifically, a roller-side scraper contacts the roller surface of the coating roller, and an end-face scraper contacts the end face of the coating roller, scraping off the glue from the roller surface and cross-section, respectively. The scraped glue falls into a receiving tray below for collection and centralized processing. Alternatively, a wiping roller can be used to remove the glue overflowing onto the coating roller, achieving the same purpose. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a glue-blocking device for a glue-coating roller according to an embodiment of the present invention.

[0022] Figure 2 for Figure 1 A partial structural diagram.

[0023] Figure 3 This is a schematic diagram of the structure of the adhesive block in an embodiment of the present invention.

[0024] Figure 4 This is a top view of the adhesive block in an embodiment of the present invention.

[0025] Figure 5 for Figure 4 AA sectional view.

[0026] The reference numerals in the accompanying drawings of the instruction manual include: 1. Glue roller; 2. Glue trough; 3. Glue blocking block; 4. Adjusting bolt; 5. Positioning nut; 6. Mounting bracket; 7. End face scraper; 8. Roller surface scraper; 9. Main channel; 10. Branch channel. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the embodiments.

[0028] Example like Figure 1 and Figure 2 As shown, a glue-blocking device for a glue-applying roller includes glue-blocking blocks 3 installed at the ends of two glue-applying rollers 1 to seal both ends of a glue trough 2. It also includes a medium inlet channel, combined with... Figure 3 , Figure 4 and Figure 5 As shown, in this embodiment, the medium inlet channel includes a main channel 9 opened inside the adhesive block 3. The main channel 9 is vertically arranged and its top extends through the top of the adhesive block 3. Multiple inclined branch channels 10 are connected to both sides of the main channel 9, and the branch channels 10 are respectively connected to the gaps between the two coating rollers 1 and the adhesive block 3. In other embodiments, the medium inlet channel can also be an external pipe, directly introducing the medium into the gap between the coating rollers 1 and the adhesive block 3.

[0029] The adhesive block 3 is installed via an adjustment mechanism: the adjustment mechanism includes a mounting bracket 6, which is fastened to the machine frame with screws or other tools. An adjusting bolt 4 passes through the mounting bracket 6, and a positioning nut 5 is threaded onto the adjusting bolt 4, which abuts against the top of the mounting bracket 6. The bottom end of the adjusting bolt 4 is detachably connected to the main channel 9, specifically through a threaded connection. By lifting or lowering the adjusting bolt 4, the position and height of the adhesive block 3 can be adjusted. After adjustment, the positioning nut is used to lock the adjusting bolt 4 in place. The adjusting bolt 4 is hollow inside, with its bottom end connected to the main channel 9, and its top end used to connect to an external delivery pump. The delivery pump is used to introduce media into the media inlet channel, between the coating roller 1 and the adhesive block 3.

[0030] The end of the coating roller 1 is equipped with a glue removal mechanism for scraping off excess glue from the coating roller 1. In this embodiment, the glue removal mechanism includes a roller surface scraper 8, an end face scraper 7, and a glue collection tray. The roller surface scraper 8 and the end face scraper 7 are mounted on the frame. The roller surface scraper 8 contacts the roller surface of the coating roller 1 to scrape off excess glue from the roller surface, and the end face scraper 7 contacts the end face of the coating roller 1 to scrape off excess glue from the end face. The glue collection tray is installed below the coating roller 1 to collect the scraped excess glue. In other embodiments, the glue removal mechanism may also include a wiping roller. The surface of the wiping roller contacts the roller surface of the coating roller 1 and is used to wipe the roller surface after scraping, further improving the cleaning effect of excess glue. The wiping roller can be replaced as needed.

[0031] A glue-blocking method for a coating roller 1 employs the aforementioned glue-blocking device. Throughout the glue coating process, a delivery pump continuously and uniformly pumps media into the media inlet channel. In this embodiment, the media is the solvent contained in the glue. By replenishing the gap between the coating roller 1 and the glue-blocking block 3 with the evaporated solvent, the problem of glue drying exacerbating friction on the glue-blocking block 3 and widening the gap in the coating roller 1 can be effectively avoided. In other embodiments, the media can also be gas. By introducing gas into the gap between the coating roller 1 and the glue-blocking block 3 to form a gas film, glue from the glue tank 2 can be directly prevented from entering the gap, thus solving the problem of solvent evaporation in the glue at its source.

[0032] The amount of medium introduced is calculated based on the rotation speed of the coating roller 1, the glue temperature, the ambient temperature, and the glue concentration, specifically satisfying the following formula:

[0033] Among them, 0 <a<1,0.005<b<0.1,0<c<2,0<d<1,0.8≤K≤1.2。

[0034] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A glue-blocking device for a glue-applying roller, comprising glue-blocking blocks disposed at the ends of two glue-applying rollers for sealing both ends of a glue trough, characterized in that: It also includes a medium inlet channel, one end of which is connected to a delivery pump, and the other end of which is connected to the gap between the glue block and the roller surface of the coating roller. The delivery pump is used to introduce the medium into the medium inlet channel.

2. The glue-blocking device for a glue-applying roller according to claim 1, characterized in that: The end of the coating roller is equipped with a glue removal mechanism, which is used to scrape off the glue that has overflowed from the coating roller.

3. The glue-blocking device for a glue-applying roller according to claim 2, characterized in that: The adhesive removal mechanism includes a roller surface scraper and an end face scraper. The roller surface scraper contacts the roller surface of the coating roller, and the end face scraper contacts the end face of the coating roller. It also includes a glue receiving tray, which is located below the coating roller.

4. The glue-blocking device for a glue-applying roller according to claim 2, characterized in that: The adhesive removal mechanism includes a wiping roller, the surface of which contacts the surface of the adhesive coating roller.

5. A glue-blocking device for a glue-applying roller according to claim 1, characterized in that: The medium inlet channel includes a main channel set inside the glue-blocking block. The top of the main channel is connected to the delivery pump, and the bottom of the main channel is connected to two branch channels. The branch channels are respectively connected to the gap between the two glue-applying rollers and the glue-blocking block.

6. A glue-blocking device for a glue-applying roller according to claim 5, characterized in that: The rubber block is connected to an adjustment mechanism.

7. A glue-blocking device for a glue-applying roller according to claim 6, characterized in that: The adjustment mechanism includes a mounting bracket with an adjustment bolt threaded through it. A positioning nut is threaded onto the adjustment bolt and presses against the top of the mounting bracket. The bottom end of the adjustment bolt is detachably connected to the main channel. The adjustment bolt is hollow inside and communicates with the main channel.

8. A method for blocking glue on a coating roller, employing a glue-blocking device for a coating roller as described in any one of claims 1-7, characterized in that: Throughout the glue coating process, the delivery pump continuously and uniformly pumps the medium into the medium inlet channel. The amount of medium introduced is calculated based on the rotation speed of the coating roller, the glue temperature, the ambient temperature, and the glue concentration.

9. A glue-blocking method for a glue-applying roller according to claim 8, characterized in that: The amount of medium introduced satisfies the following formula: 。 10. A glue-blocking method for a glue-applying roller according to claim 9, characterized in that: The medium is a gas or a solvent contained in an adhesive.

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