Glass cloth preimpregnation device

Abstract

The invention discloses a pre-impregnation device of glass cloth, and relates to the technical field of copper-clad laminates, the glass cloth comprises a plurality of first glass fiber bundles and a plurality of second glass fiber bundles, the pre-impregnation device comprises a first coating roller and a second coating roller, the glass cloth can move along the length direction of the glass cloth and passes through a gap between the first coating roller and the second coating roller; wherein the length direction of the first coating roller and the second coating roller is defined as a first direction, the length direction of the first glass fiber bundle is defined as a second direction, the length direction of the second glass fiber bundle is defined as a third direction, and the included angle between the first direction and the second direction is an acute angle or an obtuse angle. According to the invention, the first coating roller and the second coating roller are obliquely arranged and are neither perpendicular nor parallel to the first glass fiber bundle nor the second glass fiber bundle, a glue solution can gradually fill gaps among glass fibers of the second glass fiber bundle from one end of the second glass fiber bundle along the second glass fiber bundle, and bubbles are not easy to form.

Description

Technical Field

[0001] The invention relates to the technical field of copper clad laminates, and in particular to a prepreg device for glass cloth. Background Art

[0002] Copper clad laminate is the basic raw material for manufacturing printed circuit boards. Copper clad laminate is made by covering prepreg with copper foil and pressing it under high temperature and high pressure conditions. Prepreg is made by treating glass fiber cloth, impregnating it with liquid resin, and then heat treating it to make the resin enter a semi-cured state. In the pre-impregnation process of glass cloth, it is necessary to use a coating roller to press the glue into the glass cloth, and exhaust the air between the fibers in the glass cloth to improve the pre-impregnation effect of the glass cloth.

[0003] However, since the glass cloth contains glass fiber bundles that are staggered horizontally and vertically, and the coating roller is arranged longitudinally, that is, the length direction of the coating roller is perpendicular to the travel direction of the glass cloth, the coating roller is perpendicular to the transversely arranged glass fiber bundles and parallel to the longitudinally arranged glass fiber bundles.

[0004] The applicant found that there are some problems with this arrangement: each glass fiber bundle includes multiple glass fibers, and there are gaps between the multiple glass fibers. When the coating roller coats the glass fibers at an angle parallel to the glass fiber bundle, the entire glass fiber bundle contacts the glue at the same time, and the gaps between the glass fiber bundles begin to absorb the glue at the same time along the entire length. The air needs to pass vertically through the glass fiber bundle and pass through the glue to be discharged. If the air in the gaps between the glass fiber bundles is not completely discharged, bubbles will form, affecting the pre-preg effect of the glass cloth.

[0005] As recorded in the utility model patent with publication number "CN219003542U" and patent name "A device for improving the wettability of prepreg glue", it includes a prepreg device, which includes a prepreg tank and a hollow glue guide roller, which is installed in the prepreg tank. The hollow glue guide roller has a hollow cavity, and a plurality of glue outlet holes for prepreg glue are opened on the outer peripheral wall of the hollow glue guide roller, and the glue outlet holes are all connected to the hollow cavity; and it includes a main immersion tank and a glue circulation device. In the record of this scheme, the length direction of the hollow glue guide roller is perpendicular to the travel direction of the glass cloth. After the bubbles between the glass fibers are squeezed by the hollow glue guide roller, they need to pass over the glass fibers before they can be discharged. It is difficult to discharge the bubbles, and there will be a problem that some bubbles cannot be discharged during the prepreg process. Summary of the invention

[0006] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a glass cloth prepreg device for solving the problem that bubbles are difficult to be discharged during the prepreg process of the glass cloth in the prior art.

[0007] The technical solution adopted by the present invention to solve the technical problem is a prepreg device for glass cloth, wherein the glass cloth comprises a plurality of first glass fiber bundles and a plurality of second glass fiber bundles, wherein the plurality of first glass fiber bundles and the plurality of second glass fiber bundles are arranged alternately, and the first glass fiber bundles are arranged along the length direction of the glass cloth, and the second glass fiber bundles are arranged along the width direction of the glass cloth, and the prepreg device comprises: A first coating roller and a second coating roller are arranged in parallel, and the glass cloth can move along its length direction and pass through the gap between the first coating roller and the second coating roller; Among them, the length direction of the first coating roller and the second coating roller is defined as a first direction, the length direction of the first glass fiber bundle is defined as a second direction, and the length direction of the second glass fiber bundle is defined as a third direction. The angle formed by the first direction and the second direction is an acute angle or an obtuse angle, and the angle formed by the first direction and the third direction is an acute angle or an obtuse angle.

[0008] Furthermore, an acute angle formed by the first direction and the second direction is between 30° and 85°.

[0009] Furthermore, an acute angle formed by the first direction and the second direction is 45°.

[0010] Furthermore, the length directions of the first coating roller and the second coating roller are adjustable, and when the acute angle formed by the first direction and the second direction is 30°, the projected lengths of the first coating roller and the second coating roller in the width direction of the glass cloth are both greater than or equal to the width of the glass cloth.

[0011] Furthermore, it also includes: frame; The first coating roller and the second coating roller each have a central axis, one end of the central axis is rotatably connected to the frame, and the other end is slidably connected to the frame.

[0012] Furthermore, the acute angle formed by the first direction and the second direction decreases as the moving speed of the glass cloth increases, and the acute angle formed by the first direction and the second direction increases as the moving speed of the glass cloth decreases.

[0013] Further, the first coating roller is located above the second coating roller, and the prepreg device further comprises: A prepreg tank for containing glue liquid, wherein the second coating roller is partially immersed in the glue liquid; The glue-applying member is arranged above the first coating roller, and a glue port is arranged at the lower end of the glue-applying member, and the glue liquid can flow from the glue port to the first coating roller.

[0014] Furthermore, a gluing gap is provided between the gluing port and the first coating roller to allow the glue to flow out, and the gluing member can move in the height direction to adjust the size of the gluing gap.

[0015] Further, the movement direction of the contact portion of the first coating roller with the glass cloth is opposite to the movement direction of the glass cloth, and the movement direction of the contact portion of the second coating roller with the glass cloth is opposite to the movement direction of the glass cloth.

[0016] Furthermore, it also includes: A first scraper and a second scraper are fixedly arranged, wherein the first scraper is located above or to the side of the first coating roller, and the second scraper is located below or to the side of the second coating roller; A first scraper plate and a second scraper plate are fixedly arranged, and the first scraper plate and the second scraper plate are respectively located at opposite sides of the glass cloth.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects: The first coating roller and the second coating roller are tilted so as to be neither perpendicular nor parallel to the first glass fiber bundle and the second glass fiber bundle. The adhesive can gradually fill the gaps between the glass fibers along the second glass fiber bundle starting from one end of the second glass fiber bundle, and bubbles are not easily formed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the prepreg device in the embodiment; Figure 2 for Figure 1 A partial enlarged view of the middle A; Figure 3 1 is a top view of the prepreg device in the embodiment.

[0019] In the figure: 100, first coating roller; 200, second coating roller; 300, glass cloth; 400, prepreg tank; 500, gluing member; 510, glue port; 600, first scraper; 700, second scraper; 800, first scraper; 900, second scraper. DETAILED DESCRIPTION

[0020] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0021] Please refer to Figure 1-Figure 3The present invention discloses a prepreg device for glass cloth, wherein the glass cloth 300 comprises a plurality of first glass fiber bundles and a plurality of second glass fiber bundles, wherein the plurality of first glass fiber bundles and the plurality of second glass fiber bundles are arranged alternately, and the first glass fiber bundles are arranged along the length direction of the glass cloth 300, and the second glass fiber bundles are arranged along the width direction of the glass cloth 300, and the prepreg device comprises: A first coating roller 100 and a second coating roller 200 are arranged in parallel, and the glass cloth 300 can move along its length direction and pass through the gap between the first coating roller 100 and the second coating roller 200; Among them, the length direction of the first coating roller 100 and the second coating roller 200 is defined as a first direction, the length direction of the first glass fiber bundle is defined as a second direction, and the length direction of the second glass fiber bundle is defined as a third direction. The angle formed by the first direction and the second direction is an acute angle or an obtuse angle, and the angle formed by the first direction and the third direction is an acute angle or an obtuse angle.

[0022] First of all, it should be explained that in the existing pre-impregnation process of the glass cloth 300, the glass cloth 300 passes between the first coating roller 100 and the second coating roller 200, and the first coating roller 100 and the second coating roller 200 are perpendicular to the traveling direction of the glass cloth 300, that is, the length directions of the first coating roller 100 and the second coating roller 200 are perpendicular to the first glass fiber bundle and parallel to the second glass fiber bundle.

[0023] The drawback of this arrangement is that when the coating roller is squeezed to the second glass fiber bundle at a parallel angle, the bubbles in the second glass fiber bundle need to pass over part of the glass fibers before they can be discharged, and the resistance to the bubble discharge is relatively large.

[0024] Based on this, the present application tilts the first coating roller 100 and the second coating roller 200 at a certain angle (i.e., the angle formed by the first direction and the second direction is an acute angle or an obtuse angle, and the angle formed by the first direction and the third direction is an acute angle or an obtuse angle), so that the length direction of the first coating roller 100 and the second coating roller 200 is neither perpendicular to the first glass fiber bundle nor parallel to the second glass fiber bundle.

[0025] When the first coating roller 100 and the second coating roller 200 coat the glass cloth 300, the second glass fiber bundle will not contact the first coating roller 100 / the second coating roller 200 at the same time, but will be squeezed at different positions of the coating rollers at an inclined angle, and the contact position of the same second glass fiber bundle with the first coating roller 100 / the second coating roller 200 will change continuously with the movement of the glass cloth.

[0026] The advantage of this arrangement is that the contact position between the coating roller and the glass fiber bundle continuously changes along the length direction of the glass fiber bundle, so that the bubbles in the glass fiber bundle can move along the length direction of the glass fiber until the bubbles move to the end of the glass fiber bundle and are discharged.

[0027] It can be seen that the coating roller is tilted so that the bubbles can be discharged from the end of the glass fiber by moving along the length direction of the glass fiber without crossing the glass fiber. The resistance to bubble discharge is small, thereby reducing the difficulty of bubble discharge and improving the product quality of the glass cloth.

[0028] Furthermore, an acute angle formed by the first direction and the second direction is between 30° and 85°.

[0029] Furthermore, an acute angle formed by the first direction and the second direction is 45°.

[0030] Specifically, the acute angle formed by the first direction and the second direction can take any value between 30° and 85°, and preferably takes a value of 45°.

[0031] Furthermore, the length directions of the first coating roller 100 and the second coating roller 200 are adjustable, and when the acute angle formed by the first direction and the second direction is 30°, the projected lengths of the first coating roller 100 and the second coating roller 200 in the width direction of the glass cloth 300 are both greater than or equal to the width of the glass cloth 300.

[0032] It should be noted that the two coating rollers (including the first coating roller 100 and the second coating roller 200) can be set to different inclination angles based on factors such as the travel speed of the glass cloth 300 and the squeezing force of the first coating roller 100 and the second coating roller 200. However, when the coating rollers are inclined at different angles, the lengths covered by the coating rollers on the glass cloth 300 are also different.

[0033] Based on this, the present application sets that when the first coating roller 100 and the second coating roller 200 are tilted at the maximum angle, that is, when the acute angle between the first direction and the second direction is 30°, the projection length of the coating roller in the width direction of the glass cloth 300 is still greater than or equal to the width of the glass cloth 300. That is, at this time, the coating roller can still cover the entire glass cloth 300 in the width direction. On this basis, no matter how the angle of the coating roller is adjusted, its length is sufficient to cover the entire glass cloth 300 in the width direction.

[0034] Furthermore, it also includes: frame; The first coating roller 100 and the second coating roller 200 each have a central axis, one end of the central axis is rotatably connected to the frame, and the other end is slidably connected to the frame.

[0035] Specifically, one end of the central shaft slides relative to the frame, so that the entire coating roller rotates around the other end to achieve angle adjustment of the coating roller.

[0036] Of course, in order to adjust the inclination angle of the first coating roller and the second coating roller, a slide groove can be provided on both sides of the frame, so that the two ends of the central axis are respectively provided in a slide groove and can slide and rotate in the slide groove. When the inclination angle of the first coating roller and the second coating roller needs to be adjusted, only one end of the central axis is rotated in one slide groove, and the other end is slid in the other slide groove, so that the inclination angle of the first coating roller and the second coating roller can be adjusted.

[0037] At the same time, the two ends of the central shaft are respectively rotated and slid in the two slide grooves, so that the inclination angles of the first coating roller and the second coating roller can be adjusted.

[0038] After the inclination angles of the first coating roller and the second coating roller are adjusted, the sliding and rotation of the end of the central axis relative to the slide groove can be locked by bolts and other components.

[0039] Furthermore, the acute angle formed by the first direction and the second direction decreases as the moving speed of the glass cloth 300 increases, and the acute angle formed by the first direction and the second direction increases as the moving speed of the glass cloth 300 decreases.

[0040] Specifically, as the traveling speed of the glass cloth 300 increases, the speed at which the coating roller passes over the second glass fiber bundle also increases, and the speed at which the bubbles are squeezed and move along the second glass fiber bundle also increases. Therefore, in order to ensure that the bubbles can be discharged along the second glass fiber bundle at the same speed and to ensure that the bubbles can be completely discharged, it is necessary to reduce the angle between the first direction and the second direction so that the glass cloth 300 and the second glass fiber bundle are closer to vertical, so that the bubbles have enough time to be discharged.

[0041] Similarly, when the traveling speed of the glass cloth 300 is slowed down, the acute angle between the first direction and the second direction can be increased to ensure that the discharge speed of the bubbles along the second glass fiber bundle is consistent before and after the adjustment.

[0042] Further, the first coating roller 100 is located above the second coating roller 200, and the prepreg device further includes: The prepreg tank 400 is used to contain the glue liquid, and the second coating roller 200 is partially immersed in the glue liquid; The glue-applying member 500 is disposed above the first coating roller 100 . A glue port 510 is disposed at the lower end of the glue-applying member 500 . The glue liquid can flow from the glue port 510 to the first coating roller 100 .

[0043] Specifically, the present application is provided with two upper and lower coating rollers, namely, a first coating roller 100 located above the glass cloth 300 and a second coating roller 200 located below the glass cloth 300. The adhesive coating member 500 above the first coating roller 100 flows out adhesive through the adhesive port 510 and adheres to the first coating roller 100. The second coating roller 200 picks up adhesive in the prepreg tank 400, and then the two coating rollers apply adhesive to the front and back sides of the glass cloth 300 respectively. Compared with the technical solution of applying only one side in the prior art, the present application applies adhesive to both sides of the glass cloth 300 at the same time, and the prepreg effect is better.

[0044] Furthermore, a gluing gap is defined between the gluing port 510 and the first coating roller 100 to allow the glue to flow out, and the gluing member 500 can move in the height direction to adjust the size of the gluing gap.

[0045] Specifically, the height of the glue applying member 500 is adjusted to adjust the size of the glue applying gap, thereby adjusting the speed at which the glue liquid flows out of the glue outlet 510 to meet different requirements.

[0046] Further, the movement direction of the contact portion of the first coating roller 100 with the glass cloth 300 is opposite to the movement direction of the glass cloth 300 , and the movement direction of the contact portion of the second coating roller 200 with the glass cloth 300 is opposite to the movement direction of the glass cloth 300 .

[0047] Specifically, please refer to Figure 1 , the glass cloth 300 moves to the right, the first coating roller 100 above the glass cloth 300 rotates clockwise, and the second coating roller 200 below the glass cloth 300 rotates counterclockwise, so that the movement direction of the contact surface between the glass cloth 300 and the two coating rollers is opposite, so as to squeeze the glue into the glass cloth.

[0048] Furthermore, it also includes: A first scraper 800 and a second scraper 900 are fixedly arranged, wherein the first scraper 800 is located above or to the side of the first coating roller 100, and the second scraper 900 is located below or to the side of the second coating roller 200; The first scraper plate 600 and the second scraper plate 700 are fixedly arranged, and the first scraper plate 600 and the second scraper plate 700 are respectively located at opposite sides of the glass cloth 300 .

[0049] Specifically, the first scraper 800 is used to scrape off foreign matter on the first coating roller, the second scraper 900 is used to scrape off foreign matter on the second coating roller, and the first scraper plate 600 and the second scraper plate 700 respectively scrape off excess glue on both surfaces of the glass cloth 300.

[0050] Furthermore, the first scraper 800, the second scraper 900 and the gluing member 500 are all arranged in parallel with the two coating rollers.

[0051] Specifically, the first scraper, the second scraper and the gluing member are all tilted, and the tilting direction and tilting angle of the above three are the same as the tilting angle and tilting direction of the coating roller, so that the above four are parallel to each other, so as to achieve the same angle of gluing and scraping under the premise of tilted coating.

[0052] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0053] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A prepreg device for glass cloth, the glass cloth comprising a plurality of first glass fiber bundles and a plurality of second glass fiber bundles, the plurality of first glass fiber bundles and the plurality of second glass fiber bundles are arranged alternately, the first glass fiber bundles are arranged along the length direction of the glass cloth, and the second glass fiber bundles are arranged along the width direction of the glass cloth, characterized in that: The prepreg device comprises: A first coating roller and a second coating roller are arranged in parallel, and the glass cloth can move along its length direction and pass through the gap between the first coating roller and the second coating roller; Among them, the length direction of the first coating roller and the second coating roller is defined as a first direction, the length direction of the first glass fiber bundle is defined as a second direction, and the length direction of the second glass fiber bundle is defined as a third direction. The angle formed by the first direction and the second direction is an acute angle or an obtuse angle, and the angle formed by the first direction and the third direction is an acute angle or an obtuse angle.

2. A glass cloth prepreg device according to claim 1, characterized in that: The acute angle formed by the first direction and the second direction is between 30° and 85°.

3. A glass cloth prepreg device according to claim 2, characterized in that: The acute angle formed by the first direction and the second direction is 45°.

4. A glass cloth prepreg device according to claim 2, characterized in that: The length directions of the first coating roller and the second coating roller are adjustable, and when the acute angle between the first direction and the second direction is 30°, the projected lengths of the first coating roller and the second coating roller in the width direction of the glass cloth are both greater than or equal to the width of the glass cloth.

5. A glass cloth prepreg device according to claim 4, characterized in that: Also includes: frame; The first coating roller and the second coating roller each have a central axis, one end of the central axis is rotatably connected to the frame, and the other end is slidably connected to the frame.

6. A glass cloth prepreg device according to claim 4, characterized in that: The acute angle formed by the first direction and the second direction decreases as the moving speed of the glass cloth increases, and the acute angle formed by the first direction and the second direction increases as the moving speed of the glass cloth decreases.

7. The glass cloth prepreg device according to claim 1, characterized in that: The first coating roller is located above the second coating roller, and the prepreg device further comprises: A prepreg tank for containing glue liquid, wherein the second coating roller is partially immersed in the glue liquid; The glue-applying member is arranged above the first coating roller, and a glue port is arranged at the lower end of the glue-applying member, and the glue liquid can flow from the glue port to the first coating roller.

8. The glass cloth prepreg device according to claim 7, characterized in that: A gluing gap is provided between the gluing port and the first coating roller to allow the glue to flow out, and the gluing member can move along the height direction to adjust the size of the gluing gap.

9. The glass cloth prepreg device according to claim 1, characterized in that: The movement direction of the contact portion of the first coating roller with the glass cloth is opposite to the movement direction of the glass cloth, and the movement direction of the contact portion of the second coating roller with the glass cloth is opposite to the movement direction of the glass cloth.

10. The glass cloth prepreg device according to claim 1, characterized in that: Also includes: A first scraper and a second scraper are fixedly arranged, wherein the first scraper is located above or to the side of the first coating roller, and the second scraper is located below or to the side of the second coating roller; A first scraper plate and a second scraper plate are fixedly arranged, and the first scraper plate and the second scraper plate are respectively located at opposite sides of the glass cloth.

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