CN116001140A - Infiltration system and infiltration method for enhancing wettability of prepreg - Google Patents
Infiltration system and infiltration method for enhancing wettability of prepreg Download PDFInfo
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- CN116001140A CN116001140A CN202211718070.1A CN202211718070A CN116001140A CN 116001140 A CN116001140 A CN 116001140A CN 202211718070 A CN202211718070 A CN 202211718070A CN 116001140 A CN116001140 A CN 116001140A
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- prepreg
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract
The invention relates to an infiltration system and an infiltration method for enhancing the infiltration of prepreg, wherein the infiltration system comprises a prepreg device, a main infiltration device and a glue solution circulating device, and the prepreg is infiltrated by the prepreg device and the main infiltration device in sequence; the prepreg device comprises a prepreg groove, a rolling tensioning guide roller and a hollow rubberizing guide roller, wherein the convex blocks on the rolling tensioning guide roller resist and press the prepreg, so that the prepreg is loosened and then enters the prepreg groove for rubberizing, at the moment, the hollow rubberizing guide roller is used for pressurizing and injecting glue into a hollow cavity of the hollow rubberizing guide roller through a first pipeline by a first pump body in the glue solution circulating device, and the glue is injected from a liquid outlet to rubberize the prepreg, so that the rolling tensioning guide roller and the hollow rubberizing guide roller have a tensioning effect, the prepreg can be loosened and then impregnated by injecting the glue solution, and the glue solution can be effectively ensured to be smoothly impregnated into the prepreg, thereby improving the wettability of the prepreg.
Description
Technical Field
The invention relates to the field of infiltration for prepreg production in copper-clad plates, in particular to an infiltration system and an infiltration method for enhancing the wettability of prepregs.
Background
Copper clad laminates are known as a basic material for manufacturing circuit boards (PCBs), and are a sheet material obtained by impregnating a prepreg (e.g., fiberglass cloth/paper or other reinforcing material) with a resin, curing to form a prepreg (prepreg), and then coating one or both sides with copper foil and hot-pressing. Whether the copper-clad plate has excellent performance or not is critical to the prepreg processing process, so that the infiltration between the prepreg and the resin is particularly important.
At present, the requirements of PCB suppliers on the reliability of copper-clad plates are higher and higher, one of the main means is to improve the wettability of prepregs in the production process in the industry, and the traditional means for solving the wettability is to reduce the linear speed of a gluing machine, namely to increase the contact time of the prepregs and glue so as to improve the wettability, which greatly reduces the gluing efficiency and reduces the productivity. The other is to reduce the viscosity of the glue and improve the impregnation of the prepreg, but the prepreg has poor appearance and other problems such as sagging.
The method is limited, improvement of the impregnating equipment is also focused in the industry, and the basic principle of the existing impregnating equipment is that the prepreg passes through an impregnating tank under the action of a tractor and a guide roller, contacts with glue in the tank, and finally is impregnated, wherein the guide roller is smooth in plane and only plays a role in tensioning the prepreg. With respect to the improved impregnating apparatus, reference may be made to chinese patent CN201362800Y for a device for improving the wettability of prepregs, which is disclosed by arranging a small trapezoid slot with a downward opening in an opening slot of a large trapezoid slot filled with glue, immersing the opening of the small trapezoid slot below the glue solution surface to form a closed cavity, and continuously exhausting air outwards by a vacuum pump to form a certain negative pressure in the cavity, so as to exhaust the air in the reinforcing material, thereby improving the wettability of the reinforcing material. However, the small trapezoid groove is additionally arranged in the large trapezoid groove to form a closed cavity, so that the whole structure is complex, the small trapezoid groove can obstruct the fluidity of the glue solution, and particularly the reinforcing material and the glue solution can be influenced to be fully contacted in the vacuumizing process, which is obviously unfavorable for better infiltration. Therefore, there is a need in the art to develop a method of enhancing prepreg impregnation.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, and mainly aims to provide a wetting system and a wetting method for enhancing the wettability of a prepreg, which are formed by combining a rolling tensioning guide roller and a hollow gluing guide roller to loosen and glue the prepreg, so that the wettability of the prepreg is improved.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the impregnating system for enhancing the wettability of the prepreg comprises a prepreg device, a main impregnating device and a glue solution circulating device, wherein the prepreg sequentially passes through the prepreg device and the main impregnating device for impregnating; wherein the pre-soaking device comprises a pre-soaking groove; a rolling tension guide roller installed at the inlet of the prepreg tank, wherein the outer peripheral wall surface of the rolling tension guide roller is provided with a convex block which can be pressed against the prepreg and loose the prepreg; the hollow rubberizing guide roller is arranged in the prepreg groove and is provided with a hollow cavity, the peripheral wall of the hollow rubberizing guide roller is provided with a plurality of rubberizing holes for rubberizing the prepreg, and the rubberizing holes are communicated with the hollow cavity; the glue solution circulating device comprises a glue storage tank; the first pump body is communicated with the glue storage groove and the hollow glue feeding guide roller through a first pipeline, glue in the glue storage groove is pressurized and injected into the hollow glue feeding guide roller, wherein a glue inlet end of the first pipeline is connected with the glue storage groove, and a glue outlet end is connected with a port of the hollow glue feeding guide roller; and the second pump body is communicated with the glue storage groove and the pre-soaking groove through a second pipeline, glue in the pre-soaking groove is circulated into the glue storage groove, wherein a glue inlet of the second pipeline is connected with the pre-soaking groove, and a glue outlet is connected with the glue storage groove.
Further, the main soaking device comprises a main soaking tank, an upper tensioning roller, a lower tensioning roller and a squeeze roller, wherein the upper tensioning roller is arranged at an inlet of the main soaking tank, the lower tensioning roller is arranged in the main soaking tank, the squeeze roller is arranged at an outlet of the main soaking tank, the prepreg soaked in the pre-soaking tank enters the main soaking tank from the upper tensioning roller to the lower tensioning roller, and the prepreg soaked in the main soaking tank is taken out by the squeeze roller.
Further, the viscosity of the glue in the pre-soaking groove is smaller than that of the glue in the main soaking groove.
Further, the glue inlet end of the first pipeline is connected to the bottom of the glue storage groove, and the glue inlet of the second pipeline is connected to the bottom of the pre-soaking groove.
Further, the glue outlet hole is a round hole with the diameter of 0.001-100 mm.
Further, the protruding block is a cone with the height of 0.001-1 mm.
Further, the rolling tensioning guide rollers are arranged in a plurality along the feeding direction, and the heights of the protruding blocks on the rolling tensioning guide rollers along the feeding direction are sequentially increased step by step.
A wetting method for enhancing the wettability of a prepreg comprises the following specific steps: a. the prepreg enters through a rolling tensioning guide roller, and is pressed by a lug on the peripheral wall surface of the rolling tensioning guide roller, so that the prepreg is loosened in advance; b. the loose prepreg enters a prepreg groove through a hollow rubberizing guide roller, the glue solution in the liquid storage groove is pressurized and injected into a hollow cavity of the hollow rubberizing guide roller by a first pump body, and the glue solution rubberizes the prepreg through a glue outlet; c. and (5) the presoaked material after sizing enters a main soaking device for continuous soaking.
Further, a plurality of rolling tensioning guide rollers are arranged in the feeding direction in the step a, so that the heights of the convex blocks of each rolling tensioning guide roller are gradually increased in sequence along the feeding direction, and the prepreg is gradually loosened.
Compared with the prior art, the invention has obvious advantages and beneficial effects, in particular, the prepreg is pressed by the convex blocks on the rolling tensioning guide roller, so that the prepreg is loosened and then enters the prepreg groove for sizing, at the moment, the hollow sizing guide roller is used for pressing and injecting the glue solution into the hollow cavity through the first pipeline by the first pump body in the glue solution circulating device, and the glue solution is ejected from the liquid outlet for sizing the prepreg, so that the rolling tensioning guide roller and the hollow sizing guide roller have the tensioning effect, the prepreg can be loosened first and then the glue solution is ejected for infiltration, the glue solution can be effectively ensured to be smoothly immersed into the prepreg, and the wettability of the prepreg is improved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the infiltration apparatus of the present invention;
FIG. 2 is a schematic view of the structure of a calender roll of the present invention;
fig. 3 is a schematic view of the structure of the sizing guide roller of the present invention.
Reference numerals illustrate:
10. presoaking device 11 and presoaking groove
12. Roller press tensioning guide roller 121, bump
13. Hollow rubberizing deflector roll 131, hollow cavity
132. Glue outlet 14 and glue solution
20. Main immersion device 21 and main immersion tank
22. Upper tensioning roller 23, lower tensioning roller
24. Squeeze roll 25, glue solution
30. Glue circulating device 31 and glue storage tank
32. First pump body 32, second pump body
33. First conduit 34 second conduit
35. Glue solution
40. A prepreg.
Detailed Description
The invention is further described below with reference to the drawings and detailed description.
Referring to fig. 1 to 3, an infiltration system for enhancing the wettability of a prepreg includes a prepreg apparatus 10, a main dipping apparatus 20 and a glue circulating apparatus 30, wherein the prepreg 40 is infiltrated by the prepreg apparatus 10 and the main dipping apparatus 20 in sequence, and the following steps are performed:
the prepreg device 10 comprises a prepreg groove 11, a rolling tensioning guide roller 12 and a hollow sizing guide roller 13, wherein the prepreg groove 11 is internally provided with a glue solution 14 with lower viscosity for the prepreg to infiltrate. The rolling tensioning guide roller 12 is installed at the inlet of the prepreg groove 11, a plurality of protruding blocks 121 are arranged on the peripheral wall surface of the rolling tensioning guide roller 12, when the prepreg passing around the rolling tensioning guide roller 12 is pressed against the prepreg by the protruding blocks 121 and the prepreg is loosened, so that the rolling tensioning guide roller 12 plays a role of tensioning the prepreg and also plays a role of pressing and loosening the prepreg, the protruding blocks 121 are conical with the height of 0.001-1mm, further, a plurality of (two in the embodiment) rolling tensioning guide rollers 12 can be arranged along the feeding direction, the height of the protruding blocks 121 on each rolling tensioning guide roller 12 along the feeding direction is gradually increased, that is, the height of the protruding blocks on the previous rolling tensioning guide roller is smaller than the height of the protruding blocks of the next rolling tensioning guide roller along the feeding direction, so that the prepreg can be gradually loosened when passing through each rolling tensioning guide roller, the prepreg can be protected from being damaged due to sudden stress, and glue solution can be facilitated to be infiltrated into the next. The hollow sizing guide roller 13 is installed in the prepreg tank 11 and also has a function of tensioning the prepreg. The hollow glue-applying guide roller 13 has a hollow cavity 131, a plurality of glue-outlet holes 132 for applying glue to the prepreg are formed in the outer peripheral wall of the hollow glue-applying guide roller 13, the glue-outlet holes 132 are all communicated with the hollow cavity 131, so that glue solution entering the hollow glue-applying guide roller 13 can be ejected from the glue-outlet holes 132, the glue-outlet holes 132 can be round holes with diameters of 0.001-100mm, and specific dimensions can be designed according to practical requirements.
The main dipping device 20 comprises a main dipping tank 21, an upper tensioning roller 22, a lower tensioning roller 23 and a squeeze roller 24, wherein the main dipping tank 21 is internally provided with glue solution 25 with higher viscosity, and the viscosity is higher than that of the glue solution in the pre-dipping tank 11, so that the pre-dipping material firstly enters the glue solution with low viscosity and then enters the glue solution with high viscosity, and the dipping effect can be improved. The upper tensioning roller 22 is arranged at the inlet of the main dipping tank 11, the lower tensioning roller 22 is arranged in the main dipping tank 11, the extruding roller 24 is arranged at the outlet of the main dipping tank 21, wherein the prepreg 40 immersed in the pre-dipping tank enters the main dipping tank 21 from the upper tensioning roller to the lower tensioning roller, and the prepreg immersed in the main dipping tank 21 is taken out by the extruding rollers 23 and 4.
The glue circulation device 30 includes a glue storage tank 31, a first pump 32 and a second pump 33, wherein the glue 35 in the glue storage tank 31 and the glue 14 in the pre-soaking tank 11 are recycled. The first pump body 32 is communicated with the glue storage groove 31 and the hollow glue applying guide roller 13 through a first pipeline 34, so that the glue in the glue storage groove 31 is pressurized and injected into the hollow cavity 131 in the hollow glue applying guide roller 13, and the specific power of the first pump body 32 can be determined according to actual needs and is not described in detail herein. The glue inlet end of the first pipe 34 is connected with the glue storage groove 31, preferably the glue inlet end of the first pipe 34 is connected to the bottom of the glue storage groove 31, so that the first pump body can conveniently pump glue solution, and the glue outlet end of the first pipe 34 is connected with the port of the hollow cavity 131 of the hollow glue applying guide roller 13. The second pump body 33 is communicated with the glue storage groove 31 and the pre-soaking groove 13 through a second pipeline 35, glue in the pre-soaking groove 13 is circulated into the glue storage groove 31, wherein a glue inlet of the second pipeline 33 is connected with the pre-soaking groove 13, preferably, the glue inlet of the second pipeline 33 is connected to the bottom of the pre-soaking groove 13, glue in the pre-soaking groove can be better extracted, and a glue outlet 33 of the second pipeline is connected with the glue storage groove 31.
The specific infiltration method is as follows: the prepreg 40 enters through the rolling tensioning guide roller 12, the bump 121 on the peripheral wall surface of the rolling tensioning guide roller 12 presses the prepreg 40, so that the prepreg 40 is loosened in advance, and the rolling tensioning guide roller 12 plays a role in tensioning the prepreg 40. In this embodiment, the height of the protruding portion of the two rolling tension guide rollers 12 is sequentially increased along the feeding direction, so that the prepreg 40 can be gradually pressed and loosened. The prepreg after passing through the rolling tensioning guide roller 12 enters the prepreg groove 11 through the hollow rubberizing guide roller 13 to be infiltrated, at the moment, the glue solution in the liquid storage groove 31 is pressurized and injected into the hollow cavity 131 of the hollow rubberizing guide roller 13 by the first pump body 32, the glue solution is ejected to the prepreg through the glue outlet 132 to be rubberized, at the moment, the prepreg is processed into a certain loose shape through the rolling tensioning guide roller 12, so that the glue solution ejected through the glue outlet 132 is easy to infiltrate into the prepreg, the infiltration effect is enhanced, and finally, the rubberized prepreg enters the main impregnating device 20 to be continuously infiltrated. When the glue solution in the pre-soaking tank reaches a certain high position, the second pump body is started to work, and the redundant glue solution in the pre-soaking tank is pumped into the liquid storage for recycling.
The invention is designed with the key that the prepreg is pressed by the convex blocks on the rolling tensioning guide roller, so that the prepreg is loosened and then enters the prepreg groove for sizing, at the moment, the hollow sizing guide roller is used for injecting the glue solution into the hollow cavity through the first pipeline by the first pump body in the glue solution circulating device in a pressurizing way, and the glue solution is ejected from the liquid outlet for sizing the prepreg, so that the glue solution can be effectively ensured to be smoothly immersed into the prepreg, and the wettability of the prepreg is improved.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present invention still fall within the scope of the technical solutions of the present invention.
Claims (9)
1. The utility model provides an infiltration system of reinforcing prepreg wettability, includes a presoaking device and a main leaching device, and prepreg is soaked through presoaking device, main leaching device in proper order, its characterized in that: the device also comprises a glue solution circulating device; wherein the method comprises the steps of
The prepreg device includes:
a presoaking groove;
a rolling tension guide roller installed at the inlet of the prepreg tank, wherein the outer peripheral wall surface of the rolling tension guide roller is provided with a convex block which can be pressed against the prepreg and loose the prepreg;
the hollow rubberizing guide roller is arranged in the prepreg groove and is provided with a hollow cavity, the peripheral wall of the hollow rubberizing guide roller is provided with a plurality of rubberizing holes for rubberizing the prepreg, and the rubberizing holes are communicated with the hollow cavity;
the glue solution circulating device comprises:
a glue storage groove;
the first pump body is communicated with the glue storage groove and the hollow glue feeding guide roller through a first pipeline, glue in the glue storage groove is pressurized and injected into the hollow glue feeding guide roller, wherein a glue inlet end of the first pipeline is connected with the glue storage groove, and a glue outlet end is connected with a port of the hollow glue feeding guide roller;
and the second pump body is communicated with the glue storage groove and the pre-soaking groove through a second pipeline, glue in the pre-soaking groove is circulated into the glue storage groove, wherein a glue inlet of the second pipeline is connected with the pre-soaking groove, and a glue outlet is connected with the glue storage groove.
2. A prepreg infiltration system according to claim 1, in which the infiltration is enhanced by: the main soaking device comprises a main soaking tank, an upper tensioning roller, a lower tensioning roller and a squeeze roller, wherein the upper tensioning roller is arranged at an inlet of the main soaking tank, the lower tensioning roller is arranged in the main soaking tank, the squeeze roller is arranged at an outlet of the main soaking tank, the prepreg soaked in the prepreg tank enters the main soaking tank from the upper tensioning roller to the lower tensioning roller, and the prepreg soaked in the main soaking tank is taken out by the squeeze roller.
3. A prepreg infiltration system according to claim 2, in which the infiltration is enhanced by: the viscosity of the glue in the pre-soaking groove is smaller than that of the glue in the main soaking groove.
4. A prepreg infiltration system according to claim 1, in which the infiltration is enhanced by: the glue inlet end of the first pipeline is connected to the bottom of the glue storage groove, and the glue inlet of the second pipeline is connected to the bottom of the pre-soaking groove.
5. A prepreg infiltration system according to claim 1, in which the infiltration is enhanced by: the glue outlet hole is a round hole with the diameter of 0.001-100 mm.
6. A prepreg infiltration system according to claim 1, in which the infiltration is enhanced by: the protruding block is a cone with the height of 0.001-1 mm.
7. The impregnation system of claim 7, wherein the impregnation system is configured to enhance the wettability of the prepreg material: the rolling tensioning guide rollers are arranged in a plurality along the feeding direction, and the heights of the convex blocks on each rolling tensioning guide roller along the feeding direction are sequentially increased step by step.
8. A method of impregnating to enhance the wettability of a prepreg, characterized by: the method comprises the following specific steps:
a. the prepreg enters through a rolling tensioning guide roller, and is pressed by a lug on the peripheral wall surface of the rolling tensioning guide roller, so that the prepreg is loosened in advance;
b. the loose prepreg enters a prepreg groove through a hollow rubberizing guide roller, the glue solution in the liquid storage groove is pressurized and injected into a hollow cavity of the hollow rubberizing guide roller by a first pump body, and the glue solution glues the prepreg through a glue outlet;
c. and (5) the presoaked material after sizing enters a main soaking device for continuous soaking.
9. A method of impregnating for enhancing the wettability of a prepreg according to claim 8, wherein: and a plurality of rolling tensioning guide rollers are arranged in the feeding direction in the step a, so that the bump heights of the rolling tensioning guide rollers are gradually increased in sequence along the feeding direction, and the prepreg is gradually loosened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211718070.1A CN116001140A (en) | 2022-12-30 | 2022-12-30 | Infiltration system and infiltration method for enhancing wettability of prepreg |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211718070.1A CN116001140A (en) | 2022-12-30 | 2022-12-30 | Infiltration system and infiltration method for enhancing wettability of prepreg |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116001140A true CN116001140A (en) | 2023-04-25 |
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ID=86026391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211718070.1A Pending CN116001140A (en) | 2022-12-30 | 2022-12-30 | Infiltration system and infiltration method for enhancing wettability of prepreg |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116001140A (en) |
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2022
- 2022-12-30 CN CN202211718070.1A patent/CN116001140A/en active Pending
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