Glass fiber cloth impregnation device

Abstract

The utility model provides a glass fiber cloth impregnation device which comprises an impregnation glue groove and a cloth pressing wheel, the impregnation glue groove is of an open type hollow structure and is composed of an obliquely-arranged opening blade, a side plate and a bottom plate, the opening blade is perpendicularly fixed to the side plate after being connected with the edge of the bottom plate, and an embedding groove is formed in the side plate; embedding blocks matched with the embedding grooves are arranged at the two ends of the cloth pressing wheel, the cloth pressing wheel is embedded and fixed in the gum dipping groove, and the radius of the cloth pressing wheel is smaller than the distance between the bottoms of the embedding grooves and the bottom plate; and a glue solution supplementing device is also communicated with the impregnation tank. According to the utility model, the cloth pressing roller is arranged in the glue tank, and the glass cloth to be impregnated is completely immersed in the simple glue dipping tank body under the external force operation of the cloth pressing roller, so that the glue solution in the glue dipping tank can flow in the accommodating space along with the sliding of the glass cloth under the stress clamping of the cloth pressing roller; and complete impregnation is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of impregnation treatment, in particular to a glass fiber cloth impregnation device. Background Art

[0002] Glass cloth is a fabric composed of glass fiber filaments that provides reinforcement and insulation in copper-clad laminates. In the technology currently used by mainstream copper-clad laminate manufacturers, glass cloth is typically fed through a transmission mechanism into a tank filled with resin glue. The glue is evenly coated on the surface, then oven-dried and cured to form a prepreg. Glass cloth is composed of alternating warp and weft glass fiber bundles, each consisting of 150 to 300 glass filaments with a diameter less than 10μm. Due to the short time and high speed of glue coating, the glass cloth struggles to completely fill the gaps between the glass filaments, resulting in cavitation, also known as poor impregnation. With the development of electronics industry technology, the circuit design requirements of circuit boards are becoming increasingly fine, and the line spacing and hole spacing are becoming smaller and smaller, which makes the insulation performance requirements of circuit board materials increasingly higher. How to improve insulation is the main problem faced by manufacturers. The premise of ensuring insulation is how to avoid the occurrence of poor impregnation in the prepreg production process and ensure optimal permeability. The main directions currently used include: adjusting the resin formula, adding impregnation equipment, deepening the impregnation tank, and slowing down the production line speed. However, adjusting the resin formula is very difficult and time-consuming. Adding prepreg equipment will inevitably require additional space, making equipment modifications difficult. Slowing down the production rate will increase output and thus cost.

[0003] The existing method of applying adhesive to glass cloth to create adhesive sheets is prone to problems such as bubbles and poor penetration in the prepreg, which affects the copper-clad laminate's resistance to ion migration. Methods to improve prepreg penetration include adjusting the resin formula, adding prepreg equipment, deepening the prepreg tank, and slowing down the production rate. However, each of these methods has its advantages and disadvantages, and a more effective solution is needed. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art. The utility model proposes a glass fiber cloth impregnation device to solve the problems of bubbles easily appearing in the prepreg and poor impregnation.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a glass fiber cloth impregnation device, including an impregnation tank and a cloth pressing wheel,

[0006] The impregnation tank is an open hollow structure, consisting of inclined opening leaves, side plates and a bottom plate. The opening leaves are connected to the edges of the bottom plate and then fixed vertically to the side plates. An embedding groove is opened on the side plates.

[0007] Both ends of the cloth pressing wheel are provided with embedded blocks that cooperate with the embedded groove. The cloth pressing wheel is embedded and fixed in the rubber impregnation groove. The radius of the cloth pressing wheel is smaller than the distance between the bottom of the embedded groove and the bottom plate.

[0008] A glue replenishing device is also connected above the glue impregnation tank.

[0009] Furthermore, the opening leaf angle of the dipping tank is 60°.

[0010] Furthermore, the embedding groove includes an inclined section, a vertical section and a horizontal section. The vertical section is arranged based on the two ends of the horizontal section, and the inclined section is arranged based on the other end of the vertical section, and the inclined direction of the inclined section is consistent with the inclined direction of the opening leaf.

[0011] Furthermore, the cloth pressing wheel includes an insert segment and a wheel segment, the length of the wheel segment is smaller than the length of the base plate, the width of the wheel segment is smaller than the width of the base plate, and the insert width is not greater than the length of the horizontal segment.

[0012] Furthermore, the glue replenishing device includes a liquid level detection device, a glue conveying device and a control end. The liquid level detection device is fixedly arranged in the glue-containing tank, the glue conveying device is connected to the side wall of the glue-containing tank, the liquid level detection device is connected to the signal receiving end of the control end, and the glue conveying device is connected to the signal output end of the control end.

[0013] Furthermore, the liquid level detection device includes a high liquid level detection device and a low liquid level detection device, and the high liquid level detection device and the low liquid level detection device are both fixedly arranged on the side plate, the high liquid level detection device is fixedly arranged above the lateral height position of the horizontal section, and the low liquid level detection device is fixedly arranged above the lateral height position of the lowest side of the cloth pressing wheel.

[0014] Furthermore, the glue delivery device includes a delivery pipeline and a driving device arranged on the delivery pipeline. One end of the delivery pipeline is connected to the glue storage device, and the other end is connected to the side plate.

[0015] Compared with the prior art, the beneficial effects of the present invention include: by arranging a cloth pressing roller inside the glue tank, the glass cloth to be dipped in glue is completely immersed in the simple glue dipping tank body under the external force operation of the cloth pressing roller, so that the glue liquid in the glue dipping tank can flow in the accommodating space as the glass cloth slides under the stress of the cloth pressing roller, and achieve complete impregnation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Among them:

[0017] Figure 1 The schematic diagram shows the overall structure of the impregnation tank and the cloth pressing wheel;

[0018] Figure 2 The schematic diagram shows the top view of the glue impregnation tank and the cloth pressing wheel;

[0019] Figure 3 Schematically shows the side view of the combination of the glue impregnation tank and the cloth pressing wheel under the first embodiment;

[0020] Figure 4 The side view of the second embodiment of the invention schematically shows the cooperation between the impregnation tank and the cloth pressing wheel.

[0021] Numbers in the figure: 1-containing glue dipping tank, 2-cloth pressing wheel, 3-opening leaf, 4-side plate, 5-bottom plate, 6-horizontal section, 7-vertical section, 8-inclined section, 9-embedded section, 10-wheel section. DETAILED DESCRIPTION

[0022] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural methods and implementation methods. Therefore, the following specific embodiments and drawings are only illustrative of the technical solution of the present invention and should not be regarded as the entire present invention or as a limitation or restriction of the technical solution of the present invention.

[0023] A glass fiber cloth impregnation device includes a glue impregnation tank 1 and a cloth pressing wheel 2. The aforementioned glue impregnation tank 1 is an open hollow structure, consisting of inclined opening leaves 3, side panels 4 and a bottom plate 5. The opening is also connected to the edge of the bottom plate 5 and is fixed vertically to the side panel 4, and an embedded groove is provided on the side panel 4; and at both ends of the cloth pressing wheel 2, there are embedded blocks that cooperate with the embedded groove. The cloth pressing wheel 2 is fixed in the glue impregnation tank 1 through the embedded blocks and the embedded groove. The radius of the cloth pressing wheel 2 is smaller than the distance from the bottom of the embedded groove to the bottom plate 5; and a glue replenishing device is provided on the glue impregnation tank 1 for completing automatic or manual replenishment of glue. It is worth noting that the angle between the opening leaves 3 of the aforementioned glue impregnation tank 1 is 60°.

[0024] The following describes the embedding groove in detail. In the first embodiment, the embedding groove is located in the middle region of the side panel 4 and extends from the upper side of the side panel 4. The embedding groove includes an inclined section 8, a vertical section 7, and a horizontal section 6. The vertical section 7 is perpendicularly arranged at both ends of the horizontal section 6 to form a rectangular structure. The inclined section 8 is connected to the other end of the vertical section 7, and the inclination of the inclined section 8 is aligned with the inclination direction of the opening leaf 3. The configuration of the inclined section 8 facilitates the engagement and fixation of the cloth pressing wheel 2 with the impregnation tank 1.

[0025] In the second embodiment, the embedding groove is set based on the middle area of the side panel 4 and is opened from the upper side of the side panel 4. The embedding groove includes a vertical section 7 and a horizontal section 6. The aforementioned vertical section 7 is vertically set based on the two ends of the horizontal section 6 to form a rectangular structure. The cloth pressing wheel 2 completes the embedding and fixation of the cloth pressing wheel 2 and the impregnation tank 1 by placing the embedding block directly into the embedding groove.

[0026] The following is a detailed description of the cloth pressing wheel 2. The cloth pressing wheel 2 includes an insert segment 9 and a wheel segment 10. The insert segment 9 is fixedly mounted at both ends of the wheel segment 10. The length of the aforementioned wheel segment 10 is less than the length of the base plate 5, so that the cloth pressing wheel 2 can be positioned and fixed in the impregnation tank 1 by the insert segment 9, and ensure that the cloth pressing wheel 2 can be properly placed in the impregnation tank 1. The width of the aforementioned wheel segment 10 is less than the width of the base plate 5, which facilitates the impregnation process of the glass fiber cloth in the impregnation tank 1. The width of the insert segment is also no greater than the length of the horizontal segment 6, which is used to reduce the difficulty of fitting and positioning.

[0027] The following is a detailed description of the glue replenishing device. The aforementioned glue replenishing device includes a liquid level detection device, a glue delivery device, and a control terminal. The liquid level detection device is fixedly disposed in the glue-containing tank 1, the glue delivery device is connected to the side wall of the glue-containing tank 1, the liquid level detection device is connected to the signal receiving terminal of the control terminal, and the glue delivery device is connected to the signal output terminal of the control terminal. The liquid level detection device detects the liquid level of the glue in the glue-containing tank 1, and after the liquid level data is transmitted to the control terminal in real time, the control terminal automatically or manually controls the glue delivery device to complete the replenishment of the glue in the glue-containing tank 1.

[0028] The aforementioned liquid level detection device includes a high liquid level detection device and a low liquid level detection device, both of which are fixedly mounted on the side panel 4 of the glue tank 1. The high liquid level detection device is fixedly mounted on the horizontal height position of the horizontal section 6, and the low liquid level detection device is fixedly mounted on the horizontal height position of the lowest side of the cloth pressing wheel 2. The liquid level of the glue tank 1 in its current state can be detected by pressure or laser. The aforementioned glue delivery device includes a delivery pipeline and a drive device (such as a pump body) mounted on the delivery pipeline. One end of the delivery pipeline is connected to the glue storage device, and the other end is connected to the side panel 4.

[0029] By controlling the level of the adhesive, different impregnation effects of the glass fiber cloth can be provided. When the adhesive injected into the tank is lower than the adhesive below the cloth pressing wheel 2, a low liquid level is formed, and the glass fiber cloth will be partially immersed in the impregnation tank body. The amount of adhesive hung on it is small, and a low solid content bonding sheet will be formed. When the adhesive injected into the tank is higher than the adhesive below the cloth pressing wheel 2, the cloth pressing wheel 2 will be completely immersed, forming a high liquid level. In this way, when the glass fiber cloth passes through, the amount of adhesive hung is large, that is, a high solid content bonding sheet is produced. By this new design method of controlling low and high liquid levels, glass fiber cloth impregnation products with different adhesive contents can be achieved to meet the needs of the back-end experimental copper clad laminate. Through experiments, it was found that by controlling different liquid levels, the obtained impregnated glass fiber cloth also has the following typical characteristics:

[0030] Liquid level in the glue tank Glue content of glass fiber cloth impregnated finished product Finished product effect Low liquid level Low solid content Small flow, not easy to flow glue, suitable for pressing down the layer High liquid level High solid content Good fluidity, suitable for pressing ultra-multi-layer copper clad laminates

[0031] When in use, a portion of the same series solvent of the glue resin composition is sprayed into the impregnation tank 1 with an elbow bottle or a sprayer to wet it. The solvent is toluene or butanone; then the glass fiber cloth to be impregnated is connected through the guide roller to pass through the impregnation tank 1 and through the cloth pressing wheel 2, and tension is formed to avoid wrinkles and bending. Glue is injected into the impregnation tank body so that 65-55% of the volume of the cloth pressing roller is immersed in the dilute glue solution, and the remaining 35-45% of the volume is exposed above the glue solution surface; The glue tank is filled with glue liquid, and the glue liquid has a solid content of 60%-65%. The glass fiber cloth to be coated at the bottom of the glue tank 1 is completely below the liquid surface, and then the glue coating process begins. A fixed glass fiber cloth moving speed is set to allow the glass fiber cloth to completely pass through the immersion process of the glue in the glue tank, and the glass cloth inlet and the outlet where the dipping is completed are completely impregnated. As the impregnation glue flows, the air bubbles involved in the gap are squeezed out, and the glue fills the gap between the workpieces, and the dipping is completed in the glue tank 1.

[0032] By setting up a cloth pressing roller, the glass cloth that needs to be impregnated with glue is completely immersed in the glue impregnation tank 1 under the external force of the cloth pressing roller. The glass cloth enters through the lower glue groove, passes through the cloth pressing roller, and is completely immersed in the applied glue, and then pulled out from the upper opening, so that the glue in the glue basin can flow in the accommodating space as the glass cloth slides under the stress of the cloth pressing roller, and achieve complete impregnation. Due to the stress of the cloth pressing roller, the air in the narrow glue impregnation tank 1 will also be squeezed out as the glass cloth slides. When the glue flows with the cloth pressing roller, the glue in the film outlet area flows to the shallower space below, forming a pressure difference. The glue will flow from the high pressure side to the low pressure side, thereby driving away bubbles and improving the impregnation effect of the semi-cured sheet. This simple impregnation tank device is also easy to use, simple to operate, and low in cost.

[0033] The technical scope of the present invention is not limited to the contents described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical concept of the present invention, and these deformations and modifications should all fall within the scope of protection of the present invention.

Claims

1. A glass fiber cloth impregnation device, characterized in that: It includes a dipping tank (1) and a cloth pressing wheel (2), The impregnation tank (1) is an open hollow structure, consisting of an inclined opening leaf (3), a side plate (4) and a bottom plate (5). The opening leaf (3) is connected to the bottom plate (5) at its edge and then fixed vertically to the side plate (4). An embedding groove is provided on the side plate (4). Both ends of the cloth pressing wheel (2) are provided with embedded blocks that cooperate with the embedded groove, and the cloth pressing wheel (2) is embedded and fixed in the impregnation tank (1), and the radius of the cloth pressing wheel (2) is smaller than the distance between the bottom of the embedded groove and the bottom plate (5); A glue replenishing device is also connected to the glue impregnation tank (1).

2. The glass fiber cloth impregnation device according to claim 1, characterized in that: The included angle of the opening blade (3) of the impregnation tank (1) is 60°.

3. The glass fiber cloth impregnation device according to claim 1, characterized in that: The embedding groove comprises an inclined section (8), a vertical section (7) and a horizontal section (6); the vertical section (7) is arranged based on the two ends of the horizontal section (6); the inclined section (8) is arranged based on the other end of the vertical section (7); and the inclined direction of the inclined section (8) is consistent with the inclined direction of the opening leaf (3).

4. The glass fiber cloth impregnation device according to claim 3, characterized in that: The cloth pressing wheel (2) comprises an insert segment (9) and a wheel segment (10), the length of the wheel segment (10) is less than the length of the base plate (5), the width of the wheel segment (10) is less than the width of the base plate (5), and the insert width is not greater than the length of the horizontal segment (6).

5. The glass fiber cloth impregnation device according to claim 4, characterized in that: The glue replenishing device comprises a liquid level detection device, a glue delivery device and a control end, wherein the liquid level detection device is fixedly arranged in the glue-impregnating tank (1), the glue delivery device is communicated with the side wall of the glue-impregnating tank (1), the liquid level detection device is communicated with the signal receiving end of the control end, and the glue delivery device is communicated with the signal output end of the control end.

6. The glass fiber cloth impregnation device according to claim 5, characterized in that: The liquid level detection device comprises a high liquid level detection device and a low liquid level detection device, both of which are fixedly arranged on the side plate (4), the high liquid level detection device being fixedly arranged at a transverse height position above the horizontal section (6), and the low liquid level detection device being fixedly arranged at a transverse height position above the lowest side of the cloth pressing wheel (2).

7. The glass fiber cloth impregnation device according to claim 5, characterized in that: The glue liquid conveying device comprises a conveying pipeline and a driving device arranged on the conveying pipeline. One end of the conveying pipeline is connected to the glue liquid storage device, and the other end is connected to the side plate (4).

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