Dual-purpose impregnation device

Abstract

The invention discloses a dual-purpose impregnation device which comprises a rubber basin, a baffle and rollers, a first containing cavity is formed in the rubber basin, the first containing cavity comprises a second containing cavity and a third containing cavity, the baffle is detachably installed in the rubber basin, when the baffle is installed in the rubber basin, the second containing cavity and the third containing cavity are separated by the baffle, and at least two rollers are located in the second containing cavity. And one or two rollers are positioned in the third accommodating cavity. According to the scheme, the space, used for impregnating the glass fiber cloth, of the rubber basin and the number of the rollers are adjusted through the baffles detachably installed on the rubber basin so as to adapt to gluing of the glass fiber cloth with different thicknesses, it is guaranteed that the number of the rollers around which the thin cloth winds is small, and the conditions that the thin cloth is pleated and even broken in the production process are avoided. Meanwhile, it is guaranteed that the number of rollers wound by the thick cloth is large, and the thick cloth is fully infiltrated by the glue solution.

Description

Technical Field

[0001] The invention belongs to the technical field of bonding sheet production equipment, and in particular relates to a dual-purpose impregnation device. Background Art

[0002] With the continuous advancement of electronic technology and the popularity of thin and light designs of electronic products, the demand for thin and ultra-thin adhesive sheets and copper clad laminates for terminal electronic products is increasing. Therefore, the relevant technologies for producing and preparing thin and ultra-thin adhesive sheets and copper clad laminates have also become technical problems that technicians in this field need to solve urgently.

[0003] When producing an adhesive sheet (also called a "semi-cured sheet", "Prepreg" or "PP"), a glass fiber cloth (also called "glass cloth") is placed in a glue basin (also called a "glue tank" or "impregnation tank", etc.) for dipping in glue (also called "glue coating"), and then the solvent in the glue liquid (also called "glue", "resin composition" or "gelling", etc.) on the glass fiber cloth is dried to semi-cure the glue liquid on the glass fiber cloth to form an adhesive sheet.

[0004] When the glass fiber cloth is in the process of being impregnated with glue in the impregnation basin, the glass fiber cloth is passed through multiple impregnation rollers (rollers are also called wheels or rollers) to increase the impregnation time and ensure that the glue can fully penetrate the glass fiber cloth. The excess glue is squeezed out by the squeezing roller above the glue basin to achieve the purpose of controlling the glue content in the bonding sheet.

[0005] In the existing production, the impregnation device usually has two glue basins: a pre-impregnation basin 121 and a main impregnation basin 122. Figure 1As shown. Among them, the pre-impregnation basin 121 and the main impregnation basin 122 are two independent glue basins, which contain glue liquids with the same or different viscosities. In some prior arts, the main impregnation basin 122 is a relatively large capacity glue basin, and is provided with multiple impregnation rollers 140 that are staggered up and down (impregnation rollers refer to rollers that the glass fiber cloth bypasses when entering the impregnation basin, and these rollers are generally located in the impregnation glue liquid at the same time, that is, these rollers are generally immersed in the impregnation glue liquid at the same time). The glass fiber cloth 110 will first be coated with glue through the pre-impregnation basin 121 on the left, and then enter the main impregnation basin 122 on the right for coating, and finally the glass fiber cloth will be squeezed by the squeezing roller 130. As for the above-mentioned prior art, the same main impregnation basin 122 is used when coating glass fiber cloths of different thicknesses, and the same impregnation rollers 140 are used for impregnation. The above method will result in that when the thin glass fiber cloth (hereinafter referred to as "thin cloth") is coated with glue, the thin cloth needs to bypass multiple impregnation rollers 140, which will increase the tension of the thin cloth, and it is easy to cause wrinkles on the thin cloth, or even break the cloth. Therefore, for the prior art, when thick glass fiber cloth (hereinafter referred to as "thick cloth") and thin cloth use the same main dipping basin to produce adhesive sheets, the production yield of the thin cloth is usually lower than that of the thick cloth. In addition, since there are multiple rollers in the glue basin, a main dipping basin with a larger capacity needs to be used, which will cause a large amount of glue liquid waste. Summary of the invention

[0006] The invention provides a dual-purpose impregnation device whose structure can be adjusted according to the condition of the glass fiber cloth impregnated therein.

[0007] The present invention provides a dual-purpose impregnation device, comprising a glue basin, a baffle and rollers, wherein the glue basin forms a first cavity, the first cavity comprises a second cavity and a third cavity, the baffle is detachably installed on the glue basin, when the baffle is installed on the glue basin, the baffle separates the second cavity and the third cavity from each other, and at least two of the rollers are located in the second cavity, and one or two of the rollers are located in the third cavity.

[0008] The dual-purpose impregnation device also includes two squeezing rollers, wherein the dual-purpose impregnation device includes a first state and a second state. When the dual-purpose impregnation device is in the first state, the baffle is installed to the rubber basin, and the glass fiber cloth is inserted between the two squeezing rollers after bypassing the roller in the third cavity, wherein the glass fiber cloth is not impregnated in the second cavity; when the dual-purpose impregnation device is in the second state, the baffle is separated from the rubber basin, and the glass fiber cloth is inserted between the two squeezing rollers after bypassing the roller in the second cavity and the roller in the third cavity in turn.

[0009] Optionally, the third cavity is located below the two squeezing rollers, and after the glass fiber cloth passes around the roller in the third cavity, the glass fiber cloth is vertically inserted upward between the two horizontally arranged squeezing rollers.

[0010] Optionally, the dual-purpose impregnation device includes a guide roller, which is higher than the glue basin. When the dual-purpose impregnation device is in the first state, the guide roller guides the glass fiber cloth so that the fiber glass cloth bypasses the guide roller and then bypasses the roller in the third cavity.

[0011] Optionally, the guide roller includes a first guide roller, a second guide roller, and a third guide roller. When the dual-purpose impregnation device is in the first state, the first guide roller, the second guide roller, and the third guide roller jointly guide the glass fiber cloth, so that the fiber glass cloth successively bypasses the first guide roller, the second guide roller, and the third guide roller, and then bypasses the roller in the third cavity; when the dual-purpose impregnation device is in the second state, the fiber glass cloth successively bypasses the first guide roller and the second guide roller, and then the glass fiber cloth successively bypasses the roller in the second cavity and the roller in the third cavity.

[0012] Optionally, the dual-purpose impregnation device further includes a glue inlet pipeline, and the glue inlet pipeline is connected to the second cavity and the third cavity respectively.

[0013] Optionally, the dual-purpose impregnation device further includes a rubber return pipeline, and the rubber return pipeline is connected to the second cavity and the third cavity respectively.

[0014] Optionally, a glue overflow groove is formed on the outer side of the glue basin, and the glue overflow groove is connected to the glue return pipeline, or the glue overflow groove is connected to a glue storage tank.

[0015] Optionally, the dual-purpose impregnation device includes a lifting device, which can adjust the relative positions of the rubber basin, the roller and the squeezing roller in the vertical direction.

[0016] Optionally, the dual-purpose impregnation device includes a moving device, which can adjust the relative positions of the rubber basin, the roller and the squeezing roller in the horizontal direction.

[0017] Optionally, the capacity of the second cavity is more than twice the capacity of the third cavity.

[0018] Optionally, the rubber basin is formed with a slot, and the baffle is detachably mounted in the slot.

[0019] Optionally, the distance between the upper edge of the rubber basin and the horizontal plane of the central axis of the extrusion roller is 0 to 200 cm.

[0020] Optionally, when the dual-purpose impregnation device is in the first state, the roller in the third cavity is immersed in the glue liquid, and when the dual-purpose impregnation device is in the second state, the roller in the second cavity and the roller in the third cavity are both immersed in the glue liquid.

[0021] The dual-purpose impregnation device provided in one embodiment of the present invention can adjust the space of the glue basin used for impregnating glass fiber cloth and the number of rollers in the space through a baffle detachably installed on the glue basin to adapt to the coating of glass fiber cloth of different thicknesses, thereby using a smaller amount of glue when coating thin cloth, reducing the waste of glue, and avoiding the pleating or breaking of thin cloth during production. It can also make the thick cloth fully soaked with glue when coating thick cloth, reducing or avoiding the appearance of bubbles in the thick adhesive sheet. In addition, the dual-purpose impregnation device in this embodiment is convenient for switching between thick and thin cloth production, and the downtime is short during switching, which can significantly improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of an impregnation device in the prior art.

[0023] Figure 2 It is a schematic structural diagram of a dual-purpose impregnation device in a first state according to one embodiment of the present invention.

[0024] Figure 3 for Figure 2 Schematic diagram of the structure when the middle baffle is installed to the rubber basin.

[0025] Figure 4 for Figure 3 Enlarged view of part A in .

[0026] Figure 5 for Figure 2 Schematic diagram of the structure of the medium rubber basin.

[0027] Figure 6 For Figure 5 Enlarged view of part B in .

[0028] Figure 7 for Figure 2 Schematic diagram of the structure of the dual-purpose impregnation device in the second state.

[0029] Figure 8 A schematic diagram showing the structure of a dual-purpose impregnation device in a certain state for comparison.

[0030] Fig. 9 for Figure 8 Schematic diagram of the structure of another state of the comparative dual-purpose impregnation device.

[0031] Fig.10 Schematic diagram of the structure of a glue basin in another embodiment of the present invention. DETAILED DESCRIPTION

[0032] The technical solution of the present invention is further described below by specific embodiments, which do not limit the protection scope of the present invention. Some non-essential modifications and adjustments made by others based on the concept of the present invention still fall within the protection scope of the present invention.

[0033] The terms and words used in the following description and claims are not limited to the written meanings, but are merely used by the inventor to allow a clear and consistent understanding of the present invention. Accordingly, it will be apparent to those skilled in the art that the following description of various embodiments of the present invention is provided for the purpose of explanation only and not for the purpose of limiting the present invention as defined by the appended claims.

[0034] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more, preferably, "multiple" means 2 to 20, and more preferably, "multiple" means 3 to 15. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] It should be understood that the singular forms "a", "an", "said", and "the" include plural references unless the context clearly dictates otherwise. In the present invention, the expression "or" includes any or all combinations of the words listed together. For example, "A or B" may include A or B, or may include both A and B. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0036] Throughout the description and claims of this document, the words "include" and "comprise" and word variations such as "comprising" and "including" mean "including but not limited to", and are not intended to (and will not) exclude other components, integers or steps.

[0037] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "provided with", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, features defined as "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" may explicitly or implicitly include one or more of the features.

[0039] In this article, all features or conditions defined in the form of numerical ranges or percentage ranges are only for simplicity and convenience. Accordingly, the description of numerical ranges or percentage ranges should be deemed to have covered and specifically disclosed all possible sub-ranges and individual values ​​within the range, especially integer values. For example, the range description of "1 to 8" or "1-8" should be deemed to have specifically disclosed all sub-ranges such as 1 to 7, 2 to 8, 2 to 6, 3 to 6, 4 to 8, 3 to 8... etc., especially the sub-ranges defined by all integer values, and should be deemed to have specifically disclosed individual values ​​such as 1, 2, 3, 4, 5, 6, 7, 8 within the range. Similarly, the range description of "between 1 and 8" should be deemed to have specifically disclosed all ranges such as 1 to 8, 1 to 7, 2 to 8, 2 to 6, 3 to 6, 4 to 8, 3 to 8, etc., and include endpoint values. Unless otherwise specified, the above interpretation method applies to all contents of the full text of the present invention, regardless of whether the scope is broad or not.

[0040] In the drawings, the sizes of all components are only for the convenience of illustrating the relative positions of the components, and the relative sizes of the components are not real sizes and proportions.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings. Figure 2As shown, the dual-purpose impregnation device of the present invention is in the first state, wherein the dual-purpose impregnation device comprises a glue basin 600, a first guide roller 210, a second guide roller 220, a third guide roller 230, a first roller 240, a second roller 250, a third roller 260, a fourth roller 270, a fifth roller 280, a baffle 610 and two squeezing rollers 500. The glue basin 600 is formed with a first cavity 300, and the first cavity 300 comprises a second cavity 310 and a third cavity 320 which are connected to each other. The baffle 610 is detachably mounted on the glue basin 600. When the baffle 610 is mounted on the glue basin 600, the baffle 610 separates the second cavity 310 from the third cavity 320, and the second roller 250, the third roller 260, the fourth roller 270 and the fifth roller 280 are located in the second cavity 310, and the first roller 240 is located in the third cavity 320. It should be noted that the baffle 610 can be detachably installed in the glue basin 600, which means that the baffle 610 can be installed in the glue basin 600, or the baffle 610 installed in the glue basin 600 can also be taken out of the glue basin 600. In some more specific embodiments, the first cavity 300 is composed of the second cavity 310 and the third cavity 320, and the glue can flow between the second cavity 310 and the third cavity 320 under normal circumstances. After the baffle 610 is installed in the glue basin 600, the second cavity 310 and the third cavity 320 can be separated to prevent the glue from flowing between the second cavity 310 and the third cavity 320.

[0042] In order to facilitate the description of the connection between the glue basin 600 and the baffle 610, the following will be described with reference to the accompanying drawings. In some embodiments, the baffle 610 can be inserted into the glue basin 600. Figures 3 to 6As shown, a slot 640 is formed in the glue basin 600, and the baffle 610 can be inserted into the slot 640 vertically or obliquely, and the baffle 610 inserted into the slot 640 can be removed from the slot 640 vertically or obliquely. Specifically, the front inner side surface (not shown in the figure), the rear inner side surface (not shown in the figure), and the bottom surface (not marked in the figure) of the glue basin 600 are formed with slots, and the baffle 610 can be inserted into the slots of the above three surfaces to be installed in the glue basin 600. Among them, the slot 640 of the bottom surface is set 0 to 10 cm above the bottom surface of the third cavity 320. In the above scheme, the baffle 610 and the slot 640 are engaged with each other to ensure that the glue liquid between the second cavity 310 and the third cavity 320 is isolated from each other, or only a small amount of glue liquid can flow between the second cavity 310 and the third cavity 320. It should be noted that since the baffle 610 can be vertically or obliquely inserted into the slot 640 or vertically or obliquely removed from the slot 640, the assembly and disassembly of the baffle 610 is very convenient. The factory only needs to insert the baffle 610 into the slot from top to bottom or lift the baffle 610 from bottom to top. Without too much operation, it can effectively block or even cut off the flow of glue between the second cavity 310 and the third cavity 320, which is very convenient.

[0043] In addition, in some embodiments, the baffle 610 and the slot 640 can be fixed by screws. In some embodiments, the height of the baffle 610 is less than or equal to 500 mm, and the material is stainless steel or the like.

[0044] The fixing method of the baffle 610 is not limited, and the baffle 610 can be stably installed in the plastic basin 600 and can be removed from the plastic basin 600. For example, a card slot (the above form) can be set in the tank body, or the baffle 610 can be stably installed in the plastic basin 600 and can be removed from the plastic basin 600 by screw fixing or removal, magnetic fixing or removal, buckle fixing or removal, clip or latch fixing or removal, etc.

[0045] like Figure 7 As shown, the dual-purpose impregnation device of the present invention is in the second state, Figure 7 exhibit Figure 2 Schematic diagram of the structure of the dual-purpose impregnation device in the second state. Figure 7As shown, the dual-purpose impregnation device includes a glue basin 600, a first guide roller 210, a second guide roller 220, a third guide roller 230, a first roller 240, a second roller 250, a third roller 260, a fourth roller 270, a fifth roller 280 and two squeezing rollers 500. The first guide roller 210, the second guide roller 220 and the third guide roller 230 are located above the glue basin 600 and will not be immersed in the glue liquid in the glue basin 600, that is, they are located above the liquid level L of the glue liquid. The first roller 240, the second roller 250, the third roller 260, the fourth roller 270 and the fifth roller 280 are located in the first cavity 300 of the glue basin 600 and will be immersed in the glue liquid, that is, they are located below the liquid level L of the glue liquid. The dual-purpose impregnation device in the above case is in the second state.

[0046] It should be noted that the first roller 240, the second roller 250, the third roller 260, the fourth roller 270 and the fifth roller 280 are all rollers; the first guide roller 210, the second guide roller 220, the third guide roller 230 are all guide rollers; when the dual-purpose impregnation device is in the second state, the first roller 240, the second roller 250, the third roller 260, the fourth roller 270 and the fifth roller 280 are all impregnation rollers.

[0047] In some embodiments, when producing thicker bonding sheets, the state of the dual-use impregnation device is as follows: Figure 7 As shown, the glass fiber cloth 400 is thick cloth at this time. The glass fiber cloth 400 will bypass the first guide roller 210, the second guide roller 220, the second roller 250, the third roller 260, the fourth roller 270, the fifth roller 280 and the first roller 240 in sequence. After bypassing the first roller 240, the glass fiber cloth 400 moves upward to be transported to between the two squeezing rollers 500 for squeezing. By adjusting the gap between the two squeezing rollers 500, the excess glue is squeezed out to obtain the glass fiber cloth 400 containing a specific amount of glue. Then, the glass fiber cloth 400 is passed through an oven to bake and heat the glass fiber cloth 400 at a specific temperature, so that the glue on the glass fiber cloth 400 is partially cured (semi-cured), and after exiting the oven, it is rolled up to obtain a bonding sheet with a specific glue content (for example but not limited to 40-80%).

[0048] Among them, thick cloth refers to glass fiber cloth with a thickness of 1027 or above, including but not limited to 1027, 1037, 1067, 1078, 2116, 3313 or 7628 glass fiber cloth; thin cloth refers to glass fiber cloth with a thickness of less than 1017, including but not limited to 1017, 1010 or 1006 glass fiber cloth.

[0049] In some comparative embodiments, the Figure 7When the dual-purpose impregnation device shown is used to impregnate thin cloth, the thin cloth needs to pass around multiple impregnation rollers 240, 250, 260, 270, and 280, which increases the tension of the thin cloth, easily causing the thin cloth to wrinkle or even break, resulting in a production yield of the thin adhesive sheet of less than or equal to 70%.

[0050] In addition, in different embodiments, the number of rollers in the second cavity 310 is not limited to 4 and can be adjusted according to the situation. For example, the number of rollers in the second cavity 310 is greater than or equal to 2, preferably 2 to 8. In different embodiments, the number of rollers in the third cavity 320 is not limited to 1 and can be adjusted according to the situation. For example, the number of rollers in the third cavity 320 is 1 to 2, preferably 1.

[0051] In the above scheme, the number of impregnating rollers around which the thick cloth passes is increased, and the impregnation time is increased, so that the thick cloth can be fully impregnated with the glue. Figure 7 If a thin cloth is produced by using a dual-purpose impregnation device as shown in the figure, then as mentioned above, since the thin cloth needs to pass around multiple impregnation rollers, the tension of the thin cloth becomes larger, making the thin cloth easy to wrinkle or even break.

[0052] In some embodiments, when producing a thinner bonding sheet, continue to refer to Figure 2 . At this time, the baffle 610 has been installed in the glue basin 600, so that the second cavity 310 and the third cavity 320 are separated from each other. Among them, the second roller 250, the third roller 260, the fourth roller 270 and the fifth roller 280 are located in the second cavity 310. The first roller 240 is located in the third cavity 320, and the first roller 240 is located below the liquid level L of the glue liquid. The first roller 240 now belongs to the impregnation roller. At this time, the glass fiber cloth 400 is a thin cloth, and the glass fiber cloth 400 bypasses the first guide roller 210, the second guide roller 220, the third guide roller 230 and the first roller 240 in sequence. After bypassing the first roller 240, the glass fiber cloth 400 moves vertically upward to be transported to between the two squeezing rollers 500 for squeezing. By adjusting the gap between the two squeezing rollers 500, the excess glue is squeezed out to obtain the glass fiber cloth 400 containing a specific amount of glue. It should be noted that at this time, the dual-purpose impregnation device is in the first state. Next, the glass fiber cloth 400 is passed through an oven to bake and heat the glass fiber cloth 400 at a specific temperature, so that the glue on the glass fiber cloth 400 is partially cured (semi-cured), and after exiting the oven, it is rolled up to obtain a bonding sheet with a specific glue content (for example, but not limited to 70-85%).

[0053] It should be noted that the use of Figure 2When the thin cloth is impregnated in this way, since the number of impregnated rollers around which the thin cloth passes is small and the tension it is subjected to is low, wrinkles and cloth breaks rarely occur, and the production yield of thin adhesive sheets is greater than or equal to 90%.

[0054] It should be noted that both the thick bonding sheet and the thin bonding sheet are bonding sheets.

[0055] In some comparative embodiments, using Figure 2 When thick cloth is impregnated in the adhesive by the adhesive method, the thick cloth cannot be fully wetted by the adhesive because of the short impregnation time in the adhesive. Bubbles are likely to appear in the produced adhesive sheet, especially long bubbles in the glass fiber bundles. As a result, the adhesive sheet may have poor heat resistance and ion migration (CAF, conductive Anodic Filament) causing short circuit in subsequent use (for example, when copper clad laminates or printed circuit boards are prepared by the adhesive sheet), resulting in poor reliability of the product.

[0056] According to the above description, it is not difficult to find that when the baffle 610 is located in the glue basin 600, the volume of the third cavity 320 formed is smaller than that of the first cavity 300, and the number of rollers in the third cavity 320 is small, so that when producing thin adhesive sheets, the thin cloth does not need to go around multiple rollers, which avoids the situation where the tension of the thin cloth increases, thereby causing the thin cloth to fold or break. In addition, since the volume of the third cavity 320 is smaller, the waste of glue is avoided. If the following method is adopted Figure 2 When the dual-purpose impregnation device shown (i.e., the dual-purpose impregnation device in the first state) is used to produce thick cloth, the thick cloth is immersed in the glue for a short time, the thick cloth cannot be fully soaked in the glue, and bubbles are easily present in the produced adhesive sheet, which may lead to poor reliability of subsequent products.

[0057] Moreover, the first guide roller 210, the second guide roller 220 and the third guide roller 230 in the above scheme are rollers for guiding the glass fiber cloth 400. According to different production conditions, the detour trajectory of the glass fiber cloth 400 on the first guide roller 210, the second guide roller 220 and the third guide roller 230 is adjusted so that the factory can quickly adjust the state of the dual-purpose impregnation device to complete the gluing of glass fiber cloth 400 of different thicknesses.

[0058] In some embodiments, the capacity of the second cavity 310 is more than twice, preferably more than three times, and more preferably more than four times the capacity of the third cavity 320. Moreover, the number of rollers in the second cavity 310 and the third cavity 320 can also be adjusted in different embodiments according to the capacity of the second cavity 310 and the third cavity 320. It should also be noted that, in some optional embodiments, when producing a thin adhesive sheet, the baffle 610 is inserted into the card slot 640 to isolate the flow of glue between the third cavity 320 and the second cavity 310, and at the same time, the detour of the thin cloth is adjusted to only pass through the third cavity 320; because the capacity of the third cavity 320 is much smaller than that of the first cavity 300 and the second cavity 310, at this time, only the glue needs to be injected into the third cavity 320, and there is no need to inject glue into the second cavity 310. The amount of glue used is only less than 1 / 3 of that of the first cavity 300, and due to the effect of the baffle 610, only a small amount or no glue flows from the third cavity 320 to the second cavity 310, so that a large amount of glue used in the production of the thin adhesive sheet can be saved, and the amount of residual glue generated after the production is completed is also much less than that of the first cavity 300 and the second cavity 310, thereby achieving high impregnation efficiency, reducing the emission of volatile organic compounds (VOC), and saving glue costs.

[0059] It should be noted that, in general, the impregnation device is provided with a machine platform, and the roller and the squeezing roller 500 are both provided on the machine platform (the glue basin 600 is not provided on the machine platform). Specifically, the machine platform is provided with two front and rear side panels, the roller is installed between the front and rear side panels (hereinafter referred to as "side panels for fixing the roller"), and the glue basin 600 is not provided on the machine platform. Figure 1 As shown, the glue basin in the impregnation device is only a large glue basin with a large capacity, which is suitable for producing thick bonding sheets. However, when producing thin bonding sheets, the yield is less than or equal to 70%, which is a low yield. Figure 1 , Figure 2 or Figure 7 In addition to the structures such as the glue basin, rollers and squeezing rollers shown in the figure, it also includes other structures (not shown in the figure), such as but not limited to squeezing roller control structure, squeezing roller scraper, glue receiving plate, etc. Assuming that it is conceivable to use a small glue basin independent of the large glue basin to produce thin adhesive sheets, however, when switching the large glue basin to an independent small glue basin, it is necessary to first extract the glue in the large glue basin, then disconnect the glue inlet pipe and the glue return pipe of the large glue basin, remove the large glue basin, reinstall the independent small glue basin and the corresponding glue inlet pipe and glue return pipe, and then re-inject glue into the independent small glue basin; at the same time, because the side plate of the fixed roller, the above-mentioned other structures or Figure 1The presence of multiple rollers shown will hinder the replacement of the large glue basin and the independent small glue basin, making it impossible for the glass fiber cloth 400 to be impregnated only by a single impregnation roller and then vertically pass through the squeezing roller by adjusting its detour mode. Therefore, when the large glue basin and the independent small glue basin are disassembled and replaced, the side panels of the fixed roller and the redundant rollers and even part of the other structures mentioned above need to be removed to complete the replacement of the glue basin and the adjustment of the detour mode of the glass fiber cloth 400. The disassembly and assembly of the side panels of the fixed roller and the removal of the redundant rollers require a lot of manpower and time, so at least 12 hours of downtime are required, which significantly reduces production efficiency. At the same time, when the production of thin adhesive sheets is completed and switched to the production of thick adhesive sheets, in order to improve the impregnation of the thick cloth with the glue solution, it is necessary to disassemble and replace the large glue basin, disassemble and assemble the side panels of the fixed rollers and install the rollers in the above manner, and at the same time, the parallelism between the rollers (that is, to make the rollers parallel to each other) and the verticality between the rollers and the squeezing roller need to be calibrated. In addition, if the downtime is too long, the glue will easily cause the fillers in the glue to settle or agglomerate due to the long-term downtime, which will cause the properties of the glue to deteriorate or even become unusable.

[0060] Therefore, the brilliance of the technical solution of the present invention lies in that it only requires a simple and quick insertion of the baffle 610 into the glue basin 600 or removal from the glue basin 600 to form two forms to adapt to the production of different adhesive sheets. This is relatively simple and convenient, and can avoid the above-mentioned replacement of the glue basin, greatly improving work efficiency. Specifically, the glue basin 600 is formed into two forms through the baffle 610. The two forms correspond to different numbers of impregnating rollers, and the volume of the area of ​​the glue basin 600 that the glass fiber cloth 400 needs to pass through is different to adapt to the production of adhesive sheets of different thicknesses. For example, when producing thick adhesive sheets, it is only necessary to remove the baffle 610 so that the volume of the area of ​​the glue basin 600 that the glass fiber cloth 400 can pass through becomes larger, and the number of impregnating rollers is increased. Then, the glass fiber cloth 400 is adjusted to, for example, Figure 7 After the bypass method is used, production can begin without disassembling the glue inlet pipe 710, the glue return pipe 720, the side plates of the fixed rollers, and the rollers, and there is no need to calibrate the horizontality between the rollers (that is, to make the rollers parallel to each other) and the verticality between the rollers and the squeezing rollers. Moreover, since the above method impregnates thick cloth, and the thick cloth passes through a large number of impregnating rollers in the above method, its impregnation time is increased, so that the thick cloth is fully impregnated with the glue, and the produced bonding sheet is not prone to bubbles, thereby ensuring the reliability of subsequent products. When producing thin bonding sheets, only the baffle 610 needs to be installed, so that the volume of the glue basin 600 area through which the glass fiber cloth 400 can pass becomes smaller, the number of rollers that need to be impregnated is reduced, and it is adjusted to, for example Figure 2After the detour shown in the figure, production can be started, and there is no need to disassemble the glue inlet pipe 710, the glue return pipe 720, the side plate of the fixed roller, and the roller. The downtime for switching production by disassembling thick and thin cloth is at most 1 hour, which greatly shortens the downtime, saves manpower and material resources, and avoids the occurrence of filler sedimentation or agglomeration caused by long-term shutdown of glue. Moreover, since the above method impregnates thin cloth, and the thin cloth in the above method detours the impregnation roller less and is subjected to low tension, wrinkles and broken cloth rarely occur, so that the product yield is high. In addition, since the thin cloth is impregnated only in the third cavity 320, it is only necessary to transport glue to the third cavity 320, and there is no need to transport glue to the second cavity 310, which greatly reduces the amount of glue, reduces the emission of volatile organic compounds (VOC), and saves glue costs.

[0061] Since the glue basin 600 of the above scheme can quickly switch between two forms through the baffle 610, it can adapt to the production of glass fiber cloth 400 of different thicknesses. Therefore, compared with the scheme of switching between a large glue basin and an independent small glue basin, this scheme has a short downtime, avoids the occurrence of filler sedimentation or agglomeration caused by long-term shutdown of the glue, and is easy to operate, and can simultaneously improve the production yield of thick and thin adhesive sheets. On the one hand, the advantage of the above scheme compared to only using an independent small glue basin to produce adhesive sheets of different thicknesses is that the baffle 610 is removed when impregnating thick cloth, so that the volume inside the glue basin 600 is increased, and the number of impregnation rollers that the thick cloth bypasses is increased, ensuring that the thick cloth is impregnated for a long time, and the thick cloth is fully infiltrated with the glue, and it is not easy to have bubbles in the produced adhesive sheets, thereby ensuring the reliability of subsequent products. On the other hand, compared with only using a large rubber basin to produce adhesive sheets of different thicknesses, the advantage of the above scheme is that a baffle 610 is installed when impregnating a thin cloth, and the number of impregnating rollers around which the thin cloth passes is reduced. The tension on the thin cloth is small, and the thin cloth is not prone to wrinkling or breaking, thereby ensuring smooth production.

[0062] It should be noted that the third cavity 320 in the present invention is located below the two squeezing rollers 500, and the right edge of the first roller 240 in the third cavity 320 is located below the gap between the two squeezing rollers 500. This design allows the glass fiber cloth 400 to be inserted vertically upwards between the two horizontally arranged squeezing rollers 500 when it passes around the first roller 240 from left to right and is ready to enter the squeezing roller 500, so as to ensure that the amount of glue on the left and right sides of the produced adhesive sheet is the same. If the second cavity 310 including multiple rollers is located below the two squeezing rollers 500, then Figure 8 and Fig. 9 As shown. Among them, Figure 8 A schematic structural diagram of a comparative dual-purpose impregnation device in a certain state is shown. Fig. 9FIG. 2 shows a schematic diagram of the structure of the comparative dual-purpose impregnation device in another state. Figure 8 and Fig. 9 The above-mentioned dual-purpose impregnation device comprises a glue basin 600', wherein the first cavity 300', the second cavity 310' and the third cavity 320' in the glue basin 600' are separated by a baffle 610'. When impregnating thin cloth, the following is used: Figure 8 In the structure shown, since the third cavity 320' is located obliquely below the two squeezing rollers 500, when the thin cloth passes around the impregnated roller 290 in the third cavity 320' from left to right, it cannot directly extend vertically upward to between the two squeezing rollers 500, and needs to be guided by other rollers (other rollers are non-impregnated rollers) again to enter between the squeezing rollers 500. In the above scheme, since the thin cloth does not directly enter vertically upward between the two squeezing rollers 500 after leaving the impregnated roller 290, but needs to be guided by multiple non-impregnated rollers before entering between the two squeezing rollers 500, the glue on the thin cloth is likely to be lost, resulting in defects such as lack of glue, uneven coating, and glue particles in the appearance of the produced adhesive sheet. When using the method as Fig. 9 The structure shown in the figure has the same effect as Figure 1 The prior art of the structure shown is similar, although it can impregnate thick cloth, the production yield of thin bonding sheets is usually low when impregnating thin cloth. Therefore, the above-mentioned comparative dual-purpose impregnation device cannot achieve the technical effect of improving the production yield of thin bonding sheets.

[0063] The cross-sectional shape of the plastic basin 600 in the present invention includes but is not limited to a U-shaped, V-shaped, arc-shaped, irregular shape, or Figure 2 Moreover, the plastic basin 600 cannot be disassembled under normal circumstances. Secondly, the bottom surfaces of the second cavity 310 and the third cavity 320 may be flush or uneven, and the present invention does not make any specific limitation.

[0064] In addition, in some embodiments, the second cavity 310 and the third cavity 320 respectively include a glue feeding pipe 710 and a valve (not shown in the figure) for glue feeding, and the glue feeding pipe 710 may be located at the bottom of the second cavity 310 or the third cavity 320, but not limited thereto. The glue feeding pipe 710 cooperates with the valve located in the glue feeding pipe 710 to independently control the glue liquid to be fed from the bottom of the second cavity 310 or the third cavity 320. In some embodiments, the second cavity 310 and the third cavity 320 respectively include a glue return pipe 720 and a valve (not shown in the figure) for glue return, and the glue return pipe 720 may be located at the bottom of the second cavity 310 or the third cavity 320, but not limited thereto. The glue return pipe 720 cooperates with the valve located inside the glue return pipe 720 to independently control the glue liquid to be returned from the bottom of the second cavity 310 or the third cavity 320.

[0065] Optionally, the dual-purpose impregnation device includes a lifting device, which can adjust the relative position of the glue basin 600, the impregnation roller and the squeezing roller 500 in the vertical direction. When the glue in the glue basin 600 becomes less and the liquid level L of the glue drops, the lifting device is raised to shorten the distance between the glue basin 600 and the squeezing roller 500, and the impregnation roller continues to be immersed in the glue to continue to produce the bonding sheet, which helps to reduce excess glue and avoid waste of glue, thereby achieving the purpose of cost saving. The distance between the upper edge of the glue basin 600 and the horizontal plane of the central axis of the squeezing roller 500 is 0 to 200 cm, which can be optionally 0 to 150 cm, or can be optionally 15 to 150 cm. The lifting device can be optionally a lifting platform.

[0066] Optionally, the dual-purpose impregnation device includes a moving device, which can adjust the relative position of the glue basin 600, the impregnation roller and the squeezing roller 500 in the horizontal direction. Specifically, the glue basin 600 is arranged on a bracket, and the moving device is a universal wheel arranged on the bracket. The above scheme ensures that the roller can be placed in a suitable position through the moving device. In addition, in some optional embodiments, the moving device can also be a slide rail or other transmission device, such as a motor, a cylinder, etc.

[0067] In addition, in some embodiments, the glue basin 600 is formed with a glue overflow groove 700. In some optional embodiments, the glue overflow groove 700 is located outside the glue basin 600 (eg, Fig.10 As shown in the figure, a pipe 730 and a valve (not shown in the figure) are formed on the side or bottom of the overflow glue groove 700. Optionally, the pipe 730 can be connected to the return glue pipe 720, or the pipe 730 can be directly connected to the glue storage tank (or viscosity adjustment tank). Specifically, under the action of the pump body, the glue enters the glue basin 600 through the glue inlet pipeline. When the amount of glue in the glue basin 600 exceeds the capacity of the glue basin 600, the glue will continuously overflow the glue basin 600 and enter the overflow glue groove 700. The glue in the overflow glue groove 700 flows back to the return glue pipe 720 through the pipe 730 or directly flows back to the glue storage tank, thereby forming a circulation of the glue, thereby facilitating the regulation of the viscosity or solid content of the glue, and preventing the filler in the glue from precipitating, etc.

[0068] It should be noted that the overflow glue groove 700 can be distributed on any side or multiple sides of the glue basin 600. In some embodiments, the overflow glue groove 700 surrounds the glue basin 600, so that the glue overflowing from the glue basin 600 can fall into the overflow glue groove 700. In some embodiments, when the overflow glue groove 700 is located on multiple sides of the glue basin, the overflow glue grooves on multiple sides are in a connected state.

[0069] In some embodiments, when the manufacturer produces a thick adhesive sheet, first, the manufacturer uses a lifting device to lower the glue basin 600 so that the impregnated roller is no longer located in the glue basin 600. Then, the thick cloth is adjusted to bypass the roller so that the thick cloth bypasses the roller. Figure 7 Then, the glue basin 600 is raised by a lifting device so that the second roller 250, the third roller 260, the fourth roller 270, the fifth roller 280 and the first roller 240 are located in the glue basin 600. Then, glue is injected into the glue basin 600, and production can begin after the glue covers the second roller 250, the third roller 260, the fourth roller 270, the fifth roller 280 and the first roller 240.

[0070] When the manufacturer is producing a thinner adhesive sheet, first, the lifting device is used to lower the glue basin 600 so that the impregnated roller is no longer in the glue basin 600. Next, the baffle 610 is installed in the glue basin 600 to separate the second cavity 310 from the third cavity 320. Next, the thin cloth is adjusted to bypass the roller so that the thin cloth bypasses the roller as shown in FIG. Figure 2 Then, the lifting device is used to raise the glue basin 600 so that the first roller 240 is located in the third cavity 320. Then, glue is injected into the third cavity 320, and production can begin after the glue covers the first roller 240.

[0071] In addition, during the production process of thick adhesive sheets or thin adhesive sheets, the glue liquid will be fed in through the glue feed pipe 710 and returned through the glue return pipe 720 at the same time, and the amount of glue liquid fed in is controlled to be greater than the amount of glue liquid returned. After the glue liquid fills the glue basin 600, the overflowing glue liquid will flow into the glue overflow groove 700, and the returned glue liquid will flow back to the glue storage tank through the glue return pipe 720 and the glue liquid in the glue overflow groove through the pipe 730, and finally circulate to the glue basin 600 through the glue storage tank.

[0072] The above description is provided with reference to the accompanying drawings to facilitate a comprehensive understanding of the various embodiments of the invention as defined by the claims. It contains various specific details to facilitate such understanding, but these details should be regarded as exemplary only. Accordingly, those of ordinary skill in the art will recognize that changes and improvements may be made to the various embodiments described herein without departing from the scope of the invention as defined by the appended claims. In addition, for the sake of clarity and brevity, descriptions of well-known functions and configurations may be omitted.

Claims

1. A dual-purpose impregnation device, It is characterized in that It includes a glue basin, a baffle and rollers, the glue basin forms a first cavity, the first cavity includes a second cavity and a third cavity, the baffle is detachably installed on the glue basin, when the baffle is installed on the glue basin, the baffle separates the second cavity and the third cavity from each other, and at least two of the rollers are located in the second cavity, and one or two of the rollers are located in the third cavity.

2. The dual-purpose impregnation device according to claim 1, It is characterized in that It also includes two squeezing rollers, wherein the dual-purpose impregnation device includes a first state and a second state, when the dual-purpose impregnation device is in the first state, the baffle is installed to the glue basin, and the glass fiber cloth is inserted between the two squeezing rollers after passing through the roller in the third cavity, wherein the glass fiber cloth is not impregnated in the second cavity; when the dual-purpose impregnation device is in the second state, the baffle is separated from the glue basin, and the glass fiber cloth is inserted between the two squeezing rollers after passing through the roller in the second cavity and the roller in the third cavity in turn.

3. The dual-purpose impregnation device according to claim 2, It is characterized in that The third cavity is located below the two squeezing rollers, and after the glass fiber cloth passes around the rollers in the third cavity, the glass fiber cloth is vertically inserted upward between the two squeezing rollers that are horizontally arranged.

4. The dual-purpose impregnation device according to claim 3, It is characterized in that It also includes a guide roller, which is higher than the glue basin. When the dual-purpose impregnation device is in the first state, the guide roller guides the glass fiber cloth so that the fiber glass cloth bypasses the guide roller and then bypasses to the roller in the third cavity.

5. The dual-purpose impregnation device according to claim 4, It is characterized in that The guide rollers include a first guide roller, a second guide roller, and a third guide roller. When the dual-purpose impregnation device is in the first state, the first guide roller, the second guide roller, and the third guide roller jointly guide the glass fiber cloth, so that the fiber glass cloth sequentially bypasses the first guide roller, the second guide roller, and the third guide roller, and then bypasses the roller in the third cavity; when the dual-purpose impregnation device is in the second state, the fiber glass cloth sequentially bypasses the first guide roller and the second guide roller, and then the glass fiber cloth sequentially bypasses the roller in the second cavity and the roller in the third cavity.

6. The dual-purpose impregnation device according to claim 2, It is characterized in that It also includes a glue inlet pipeline, which is connected to the second cavity and the third cavity respectively.

7. The dual-purpose impregnation device according to claim 6, It is characterized in that It also includes a rubber return pipe, which is connected to the second cavity and the third cavity respectively.

8. The dual-purpose impregnation device according to claim 7, It is characterized in that An overflow glue groove is formed on the outer side of the glue basin, and the overflow glue groove is communicated with the glue return pipeline, or the overflow glue groove is communicated with a glue liquid storage tank.

9. The dual-purpose impregnation device according to claim 2, It is characterized in that It comprises a lifting device, which can adjust the relative positions of the rubber basin, the roller and the squeezing roller in the vertical direction.

10. The dual-purpose impregnation device according to claim 2, It is characterized in that It comprises a moving device, which can adjust the relative positions of the rubber basin, the roller and the squeezing roller in the horizontal direction.

11. The dual-purpose impregnation device according to any one of claims 1 to 10, It is characterized in that The capacity of the second chamber is more than twice the capacity of the third chamber.

12. The dual-purpose impregnation device according to any one of claims 1 to 10, It is characterized in that The plastic basin is formed with a slot, and the baffle is detachably mounted on the slot.

13. The dual-purpose impregnation device according to any one of claims 2 to 10, It is characterized in that The distance between the upper edge of the rubber basin and the horizontal plane of the central axis of the squeezing roller is 0 to 200 cm.

14. The dual-purpose impregnation device according to any one of claims 2 to 10, It is characterized in that When the dual-purpose impregnation device is in the first state, the roller in the third cavity is immersed in the glue liquid. When the dual-purpose impregnation device is in the second state, the roller in the second cavity and the roller in the third cavity are both immersed in the glue liquid.

Images