阅读说明：本技术 一种胶膜连续放卷方法、装置及预浸料生产工艺 (Continuous rubber film unwinding method and device and prepreg production process ) 是由 王至昶 刘欣 于 2021-08-31 设计创作，主要内容包括：本发明涉及复合材料技术领域,尤其涉及一种胶膜连续放卷方法、装置及预浸料生产工艺,包括：步骤一：在生产时,在当前胶膜耗尽之前,将另一卷胶膜起始端两侧与当前胶膜两侧涂胶位置对齐；步骤二：将另一卷胶膜起始端贴合在当前胶膜上,且树脂面朝向碳纤维；步骤三：两卷胶膜至少局部贴合后,将原胶膜切除；步骤四：将原胶膜放卷装置关闭。本发明中,通过在当前胶膜耗尽之前,将另一卷胶膜起始端两侧与当前胶膜两侧涂胶位置对齐,并贴合在当前胶膜上,由于树脂存在较大的粘性,会将两卷胶膜粘接在一起,当两卷胶膜至少局部贴合后,将原胶膜切除,从而实现不停车的连续放卷,可实现大长度的预浸料的连续生产,大大节省了生产成本。(The invention relates to the technical field of composite materials, in particular to a continuous rubber film unwinding method, a continuous rubber film unwinding device and a prepreg production process, wherein the continuous rubber film unwinding method comprises the following steps: the method comprises the following steps: during production, before the current glue film is used up, aligning two sides of the starting end of the other roll of glue film with glue coating positions on two sides of the current glue film; step two: attaching the starting end of the other roll of adhesive film to the current adhesive film, wherein the resin surface faces the carbon fibers; step three: cutting off the original adhesive film after the two adhesive films are at least partially attached; step four: and closing the original rubber film unwinding device. According to the invention, before the current adhesive film is used up, two sides of the starting end of the other adhesive film roll are aligned with the adhesive coating positions on the two sides of the current adhesive film and are attached to the current adhesive film, the two adhesive films are adhered together due to the larger viscosity of the resin, and after the two adhesive films are at least partially attached, the original adhesive film is cut off, so that continuous unreeling without stopping is realized, the continuous production of the prepreg with large length can be realized, and the production cost is greatly saved.)

1. A continuous film unwinding method is characterized by comprising the following steps:

the method comprises the following steps: during production, before the current glue film is used up, aligning two sides of the starting end of the other roll of glue film with glue coating positions on two sides of the current glue film;

step two: attaching the starting end of the other roll of adhesive film to the current adhesive film, wherein the resin surface faces the carbon fibers;

step three: cutting off the original adhesive film after the two adhesive films are at least partially attached;

step four: and closing the original rubber film unwinding device.

2. The adhesive film continuous unwinding method of claim 1, wherein the adhesive film passes through a guide roller before being pressed with the carbon fibers, and in the second step, the bonding position is located before the guide roller.

3. The adhesive film continuous unreeling method as claimed in claim 2, wherein two adhesive films are respectively located at two ends of the guide roller, and when the adhesive film to be replaced is located in front of the guide roller, the starting end is attached to the back of the current adhesive film; when the glue film to be replaced is positioned behind the guide roller, the starting end is attached to the front surface of the current glue film.

4. The adhesive film continuous unwinding method as claimed in claim 1, wherein two rolls of the adhesive film are respectively disposed on two unwinding devices.

5. The adhesive film continuous unreeling method of claim 1, wherein in the third step, when the local joint of the two rolls of adhesive films passes through two press rollers for pressing the carbon fibers and the adhesive films, one of the press rollers is away from the carbon fibers by a predetermined distance.

6. The adhesive film continuous unwinding method as claimed in claim 1, wherein in the first step, before aligning the starting end of another roll of adhesive film, the PE film at the end of the adhesive film is separated and wound on a winding roller.

7. The adhesive film continuous unwinding method as claimed in claim 1, wherein in the first step, the production line is operated at a normal speed or a low speed.

8. The continuous unwinding device for the adhesive film is characterized by comprising two unwinding devices, wherein the two unwinding devices are arranged at the lower end of a production line, a guide roller is arranged between the two unwinding devices, and the adhesive film passes through the guide roller and then is pressed with carbon fibers.

9. The adhesive film continuous unwinding device of claim 8, wherein the two unwinding devices are respectively arranged on two sliding rails, the two sliding rails slide along a direction perpendicular to the movement direction of the carbon fiber, and the sliding rails can be pulled out when an adhesive film roll needs to be loaded.

10. A prepreg production process, characterized in that, when carbon fibers are laminated with an adhesive film, the adhesive film continuous unreeling method of any one of claims 1 to 7 is adopted.

Technical Field

The invention relates to the technical field of composite materials, in particular to a continuous rubber film unwinding method and device and a prepreg production process.

Background

The prepreg is an intermediate material for producing the composite material and is a raw material used for high-grade composite materials, and the quality of the prepreg directly influences the quality of a finished product of the composite material. Because the production of the prior prepreg requires that the length is fixed, for example, the wind power blade prepreg with larger application has strict requirements on the laying process, the rolling length needs to be cut into coiled materials with different lengths according to the variable cross-section laying, and continuous production is needed. Therefore, the production of the prepreg cannot be stopped, otherwise, the quality is poor, the whole roll of the prepreg wound in the front cannot be used due to the poor quality caused by the stop, the price of the carbon fiber raw material and the resin is high, and the stop reproduction causes great loss.

When the large-gram-weight prepreg is continuously produced, the thickness of a single layer is increased, when a carbon fiber laminating adhesive film (resin + release paper) is pressed, the length of the whole adhesive film package can be reduced due to the fact that the whole adhesive film package is thick, the lower adhesive film is located below a production line, the position space is limited, and the adhesive film package cannot be too large, so that the continuous production of the large-length prepreg cannot be carried out.

In view of the above problems, the designer is actively making research and innovation based on the practical experience and professional knowledge that the product engineering is applied for many years and by matching with the application of the theory, so as to create a continuous film unwinding method, a continuous film unwinding device and a prepreg production process, and make the continuous film unwinding method, the continuous film unwinding device and the prepreg production process more practical.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of Invention

The invention provides a continuous film unwinding method and device and a prepreg production process, and aims to effectively solve the problems in the background art.

In order to achieve the purpose, the invention adopts the technical scheme that: a continuous rubber film unwinding method, a continuous rubber film unwinding device and a prepreg production process comprise the following steps:

the method comprises the following steps: during production, before the current glue film is used up, aligning two sides of the starting end of the other roll of glue film with glue coating positions on two sides of the current glue film;

step two: attaching the starting end of the other roll of adhesive film to the current adhesive film, wherein the resin surface faces the carbon fibers;

step three: cutting off the original adhesive film after the two adhesive films are at least partially attached;

step four: and closing the original rubber film unwinding device.

Further, the adhesive film passes through a guide roller before being pressed with the carbon fibers, and in the second step, the joint is located before the guide roller.

Furthermore, two rolls of glue films are respectively positioned at two ends of the guide roller, and when the glue film to be replaced is positioned in front of the guide roller, the starting end is attached to the back of the current glue film; when the glue film to be replaced is positioned behind the guide roller, the starting end is attached to the front surface of the current glue film.

Furthermore, the two rolls of adhesive films are respectively arranged on the two unwinding devices.

Further, in the third step, when the local joint of the two rolls of adhesive films passes through the two compression rollers for pressing the carbon fiber and the adhesive films, one of the compression rollers is far away from the carbon fiber by a preset distance.

Further, in the first step, before aligning the starting end of another roll of glue film, the PE film at the end part of the glue film is separated and wound on a winding roller.

Further, in the first step, the running speed of the production line is a normal speed or a low speed.

The invention also comprises a continuous film unreeling device which comprises two unreeling devices, wherein the two unreeling devices are arranged at the lower end of the production line, a guide roller is arranged between the two unreeling devices, and the film passes through the guide roller and then is pressed with the carbon fibers.

Furthermore, the two unwinding devices are respectively arranged on two slide rails, the two slide rails slide along the direction perpendicular to the movement direction of the carbon fiber, and when the rubber film roll needs to be loaded, the slide rails can be pulled out.

The invention also comprises a prepreg production process, wherein a glue film continuous unreeling method is adopted when the carbon fiber and the glue film are laminated.

The invention has the beneficial effects that: according to the invention, before the current adhesive film is used up, the two sides of the starting end of the other adhesive film roll are aligned with the adhesive coating positions on the two sides of the current adhesive film and are attached to the current adhesive film, the two adhesive films are adhered together due to the larger viscosity of the resin, and after the two adhesive films are at least partially attached, the original adhesive film is cut off, so that continuous unreeling without stopping is realized, the continuous production of the prepreg with large length can be realized, and the production cost is greatly saved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a flow chart of the present invention;

fig. 2 is a schematic structural view of the adhesive film continuous unwinding device.

Reference numerals: 1. an unwinding device; 11. rolling the rubber film; 12. a guide roller; 2. a slide rail.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1: a continuous film unwinding method comprises the following steps:

the method comprises the following steps: during production, before the current glue film is used up, aligning two sides of the starting end of the other roll of glue film with glue coating positions on two sides of the current glue film;

step two: attaching the starting end of the other roll of adhesive film to the current adhesive film, wherein the resin surface faces the carbon fibers;

step three: cutting off the original adhesive film after the two adhesive films are at least partially attached;

step four: and closing the original rubber film unwinding device 1.

Through before current glued membrane exhausts, align another book glued membrane initiating terminal both sides and current glued membrane both sides rubber coating position to the laminating is on current glued membrane, because resin has great viscidity, can bond two rolls of glued membranes together, when two rolls of glued membranes at least local laminating back, amputate former glued membrane, thereby realize unreeling in succession not stopping, can realize the continuous production of the preimpregnation material of big length, saved manufacturing cost greatly.

In this embodiment, the adhesive film passes through a guide roller 12 before being pressed with the carbon fibers, and in the second step, the bonding position is located before the guide roller 12.

Before the glue film and the carbon fiber are pressed, the glue film passes through a guide roller 12, and in the second step, the joint position is located in front of the guide roller 12, so that the guide roller 12 can pre-press two layers of glue films, and the two layers of glue films are bonded more firmly.

As a preference of the above embodiment, the two rolls of glue films are respectively located at two ends of the guide roller 12, and when the glue film to be replaced is located in front of the guide roller 12, the starting end is attached to the back of the current glue film; when the film to be replaced is located behind the guide roller 12, the starting end is attached to the front surface of the current film.

In order to realize continuous production, the two rolls of adhesive films can be replaced with each other, and the current adhesive film can be replaced as long as the current adhesive film needs to be replaced no matter which roll of adhesive film is used currently, so that the continuous unreeling length is increased, and when the adhesive film needing to be replaced is positioned in front of the guide roller 12, the starting end is attached to the back of the current adhesive film; when the glued membrane that needs the replacement is located the deflector roll 12 after, the initiating terminal laminating is in current glued membrane openly to change when not only the glued membrane is exhausted soon, when finding the glued membrane bad, also can change, increased the quality of production product.

As a preference of the above embodiment, the two rolls of adhesive films are respectively disposed on the two unwinding devices 1.

Through setting up two glued membrane respectively on two unwinding device 1 to unreeling of two glued membranes, tension control etc. are all independent, tension control, the rectifying etc. when can guaranteeing to unreel, have guaranteed the production quality of product.

In the third step, when the local joint of the two rolls of adhesive films passes through the two press rollers for pressing the carbon fiber and the adhesive films, one of the press rollers is away from the carbon fiber by a predetermined distance.

Because two rolls of glued membrane local laminating departments are thick, when with two compression rollers with carbon fiber and glued membrane pressfitting, the pressure that probably receives is great to influence product quality, so when two rolls of glued membrane local laminating departments pass through with two compression rollers with carbon fiber and glued membrane pressfitting, keep away from carbon fiber predetermined distance with one of them compression roller, thereby guarantee the uniformity of pressfitting power, increased product quality.

As a preference of the above embodiment, in the first step, before aligning the starting end of another roll of glue film, the PE film at the end of the glue film is separated and wound on the winding roller.

Through separating glued membrane tip PE membrane and winding on the take-up roll to unreel the glued membrane that can be better.

Preferably, in the first step, the line running speed is a normal speed or a low speed.

Through setting up production line operating speed into normal speed or low-speed to more convenient two rolls of glued membranes are changed, thereby unreel in succession, prevent that speed too fast and lead to the poor operation, arouse the product quality problem.

As shown in fig. 2, the invention further includes a continuous unwinding device for the adhesive film, which includes two unwinding devices 1, the two unwinding devices 1 are disposed at the lower end of the production line, a guide roller 12 is disposed between the two unwinding devices 1, and the adhesive film is pressed with the carbon fiber after passing through the guide roller 12.

Through setting up two unwinding device 1, two unwinding device 1 set up in the production line lower extreme, are provided with deflector roll 12 between two unwinding device 1, the glued membrane through deflector roll 12 back with the carbon fiber pressfitting to realize not stopping unreeling in succession, can realize the continuous production of the preimpregnation material of big length, saved manufacturing cost greatly.

In this embodiment, the two unwinding devices 1 are respectively disposed on the two sliding rails 2, the two sliding rails 2 slide along a direction perpendicular to the movement direction of the carbon fiber, and when the glue film roll 11 needs to be loaded, the sliding rails 2 can be pulled out.

Through setting up two unwinding device 1 respectively on two slide rails 2, two slide rails 2 slide along perpendicular to carbon fiber direction of motion, when needs dress glued membrane book 11, slide rail 2 can pull out to the convenience is installed the change to the glued membrane, has increased the convenience of operation.

The invention also comprises a prepreg production process, wherein a glue film continuous unreeling method is adopted when the carbon fiber and the glue film are laminated.

Therefore, when the long-length prepreg is produced, the midway halt can be avoided, the loss is reduced, and the quality and the production efficiency are improved. For example, the carbon yarn length is 3000 m, 3000 m of glue film needs to be coated, the maximum glue film can be 2500 m, 500 m of glue film needs to be connected, and 3000 m of carbon yarn can be continuously finished by changing the roll without stopping.

It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.