阅读说明：本技术 一种短纤维定向增强树脂膜层间装置 (Short fiber oriented reinforced resin film interlayer device ) 是由 辛志博 马玥 段玉岗 郝紫琦 张富淦 柳天奇 李婷 于 2021-07-19 设计创作，主要内容包括：一种短纤维定向增强树脂膜层间装置,包括搅拌料桶,搅拌料桶内部设有搅拌叶片,搅拌料桶出口和扁嘴喷头入口连接,扁嘴喷头出口处设有定向挡板,定向挡板与传送带前端面呈一定角度,传送带的输送带为镂空状,中间部分有凹槽,输送带下方的前端设置回收槽,输送带下方的后端设置加热平板；传送带后端设有热压滚轮,热压滚轮上方设有树脂膜卷轴支架,热压滚轮带动树脂膜卷轴支架内的树脂膜,在分布定向短纤维的凹槽内完成热压过程,然后进行铺带的收卷或直接进入铺放头进行铺放；本发明通过对短纤维方向进行控制,实现短纤维定向增强树脂膜层间性能的铺带制备,短纤维定向使得铺带所制备的零件具有更大的性能可控性,并对树脂膜铺带的层间进行增强。(A short fiber oriented reinforced resin film interlayer device comprises a stirring barrel, wherein stirring blades are arranged inside the stirring barrel, an outlet of the stirring barrel is connected with an inlet of a flat nozzle spray head, an outlet of the flat nozzle spray head is provided with an oriented baffle, the oriented baffle and the front end surface of a conveying belt form a certain angle, the conveying belt of the conveying belt is hollow, the middle part of the conveying belt is provided with a groove, the front end below the conveying belt is provided with a recovery tank, and the rear end below the conveying belt is provided with a heating flat plate; the rear end of the conveying belt is provided with a hot pressing roller, a resin film reel support is arranged above the hot pressing roller, the hot pressing roller drives the resin film in the resin film reel support to complete a hot pressing process in the grooves for distributing the directional short fibers, and then the conveying belt is wound or directly enters the laying head to be laid; according to the invention, the direction of the short fibers is controlled, so that the paving belt preparation of the short fibers for directionally enhancing the performance between resin film layers is realized, the short fibers are oriented, so that the parts prepared by the paving belt have higher performance controllability, and the interlayer of the resin film paving belt is enhanced.)

1. A short fiber oriented reinforced resin film interlayer device comprises a stirring barrel (1), and is characterized in that: stirring blades (2) are arranged in the stirring barrel (1), the outlet of the stirring barrel (1) is connected with the inlet of the flat nozzle spray head (3), a directional baffle (4) is arranged at the outlet of the flat nozzle spray head (3), a certain angle is formed between the directional baffle (4) and the front end face of the conveying belt (5), the conveying belt of the conveying belt (5) is hollowed, a groove (501) is formed in the middle part of the conveying belt, a recovery groove is formed in the front end below the conveying belt, and a heating flat plate (502) is arranged at the rear end below the conveying belt; the rear end of the conveyor belt (5) is provided with a hot pressing roller (7), a resin film reel support (6) is arranged above the hot pressing roller (7), the hot pressing roller (7) drives the resin film in the resin film reel support (6) to complete a hot pressing process in the grooves (501) for distributing the directional short fibers, and then the laying belt is rolled or directly enters the laying head (8) to be laid.

2. The interlayer device of a short fiber-oriented reinforced resin film according to claim 1, wherein: the stirring blade (2) is a propelling blade.

3. The interlayer device of a short fiber-oriented reinforced resin film according to claim 1, wherein: the outlet of the flat nozzle spray head (3) is rectangular, and the content of short fibers is controlled by controlling the flow rate of the mixed liquid of the short fibers and the dispersion liquid and the speed of the conveyor belt (5).

4. The interlayer device of a short fiber-oriented reinforced resin film according to claim 1, wherein: the distance between the flat nozzle spray head (3) and the directional baffle plate (4) is controlled to reduce the spraying pressure, so that the dispersion liquid flows onto the directional baffle plate (4).

5. The interlayer device of a short fiber-oriented reinforced resin film according to claim 1, wherein: the directional baffle (4) is placed at an angle of 90 degrees with the plane of the conveyor belt (5), and is placed in a groove (501) of the conveyor belt (5) at a certain angle with the end face of the conveyor belt (5) so as to limit the distribution range and the fiber direction of directional short fibers, the short fibers are distributed and limited in the width of the groove (501), and the fiber angle is limited between the direction of the directional baffle (4) and the horizontal direction; the wider the orientation baffle (4), the smaller the angle with the end face of the conveyor belt (5), and the closer the fiber direction is to the horizontal direction.

6. The interlayer device of a short fiber-oriented reinforced resin film according to claim 1, wherein: the width of the groove (501) corresponds to the width of the resin film, so that the distribution range of the short fibers is limited, and the shape of the impregnated tape in the forming process is maintained.

7. The interlayer device of a short fiber-oriented reinforced resin film according to claim 1, wherein: the heating flat plate (502) realizes the evaporation of residual dispersion liquid, and the dipped paving belt is insulated, so that the deformation of the paving belt is reduced.

8. The interlayer device of a short fiber-oriented reinforced resin film according to claim 1, wherein: the width of the hot-pressing roller (7) is slightly smaller than that of the groove (502), the hot-pressing roller (7) drives the resin film to move forwards, the short fibers on the conveyor belt (5) are attached to the resin film, and hot-pressing preparation of the short fiber oriented reinforced resin film paving belt is realized under the combined action of the hot-pressing roller (7) and the conveyor belt (5); the short fibers are attached to one side of the resin film, and are dispersed on two sides of the interlayer along with the melting of the resin film in the laying process, so that the interlayer is reinforced.

Technical Field

The invention relates to the technical field of short fiber reinforced thermoplastic resin composite materials, in particular to a short fiber oriented reinforced resin film interlayer device.

Background

The molecular structure of the thermoplastic resin is linear, so that the thermoplastic resin has the performances of softening by heating and hardening by cooling, and has no chemical reaction, so that the thermoplastic resin has the advantage of simple and convenient processing and forming, but has poor heat resistance and rigidity. The chopped fibers can effectively reinforce the thermoplastic resin and improve the mechanical property of the thermoplastic resin, so that the thermoplastic resin is suitable for more fields with certain requirements on strength, and the cost performance is greatly improved.

In the short fiber reinforced thermoplastic resin composite material, the retention length and fiber direction of the short fibers have a great influence on the performance of the reinforced composite material. When the retention length of the short fiber in the resin is about 1-3mm, the reinforcing effect is better. Inevitably, in the conventional injection molding process, after being sheared by equipment, the initial fiber length of the fiber with the length of several millimeters is reduced to a few tenths of millimeters, and the material fluidity is reduced due to the addition of short fibers, so that the fiber is abraded, and the performance of the composite material is influenced; meanwhile, the fiber direction is difficult to control in the injection molding process, and the performance enhancement degree of the prepared composite material is difficult to control in the use process; in addition, since the short fibers are discontinuous and force cannot be transmitted between the short fibers, the resin is reinforced only in the layer, and the strength between the layers is still weak, and the advantage of short fiber reinforcement cannot be further shown.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a short fiber oriented reinforced resin film interlayer device, which realizes the preparation of a belt with the performance of short fiber oriented reinforced resin film interlayers by controlling the direction of short fibers, wherein the short fiber orientation enables parts prepared by the belt to have higher performance controllability, and enhances the interlayer performance of the resin film belt so as to improve the interlayer performance of the prepared parts.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a short fiber oriented reinforced resin film interlayer device comprises a stirring barrel 1, wherein stirring blades 2 are arranged inside the stirring barrel 1, an outlet of the stirring barrel 1 is connected with an inlet of a flat nozzle spray head 3, an outlet of the flat nozzle spray head 3 is provided with an oriented baffle 4, the oriented baffle 4 and the front end face of a conveyor belt 5 form a certain angle, the conveyor belt of the conveyor belt 5 is hollowed, the middle part of the conveyor belt is provided with a groove 501, the front end below the conveyor belt is provided with a recovery tank, and the rear end below the conveyor belt is provided with a heating flat plate 502; the rear end of the conveyor belt 5 is provided with a hot pressing roller 7, a resin film scroll support 6 is arranged above the hot pressing roller 7, the hot pressing roller 7 drives the resin film in the resin film scroll support 6 to complete a hot pressing process in the grooves 501 in which the directional short fibers are distributed, and then the conveyor belt is wound or directly enters the laying head 8 to be laid.

The stirring blade 2 is a propelling blade.

The outlet of the flat nozzle spray head 3 is rectangular, and the content of short fibers is controlled by controlling the flow rate of the mixed liquid of the short fibers and the dispersion liquid and the speed of the conveyor belt 5.

By controlling the distance between the flat nozzle 3 and the directional baffle 4, the ejection pressure is reduced, so that the dispersion liquid flows onto the directional baffle 4.

The directional baffle 4 is arranged at an angle of 90 degrees with the plane of the conveyor belt 5, and is arranged in the groove 501 of the conveyor belt 5 at a certain angle with the end face of the conveyor belt 5 so as to limit the distribution range and the fiber direction of directional short fibers, the short fibers are distributed and limited in the width of the groove 501, and the fiber angle is limited between the direction of the directional baffle 4 and the horizontal direction; the wider the directing baffle 4, the smaller the angle with the end face of the conveyor belt 5, the closer the fibre direction is to the horizontal.

The width of the groove 501 corresponds to the width of the resin film, so as to limit the distribution range of the short fibers and maintain the shape of the impregnated tape in the forming process.

The heating plate 502 evaporates the residual dispersion, and preserves the heat of the impregnated tape to reduce its deformation.

The width of the hot-pressing roller 7 is slightly smaller than that of the groove 502, the hot-pressing roller 7 drives the resin film to move forwards, the short fibers on the conveyor belt 5 are attached to the resin film, and hot-pressing preparation of the short fiber oriented reinforced resin film paving belt is realized under the combined action of the hot-pressing roller 7 and the conveyor belt 5; the short fibers are attached to one side of the resin film, and are dispersed on two sides of the interlayer along with the melting of the resin film in the laying process, so that the interlayer is reinforced.

Compared with the prior art, the invention has the following beneficial effects:

1) through the design of the groove 501 of the conveyor belt and the positioning baffle 4, the control of the direction of short fibers is realized, and the reinforcement of the directional fibers enables the performance of the prepared part paved with the belt to be better controlled and the performance of the part paved with the belt to be better enhanced in the directional direction; in addition, the short fibers are mainly attached to one side of the resin film, so that the short fibers are dispersed on two sides of the interlayer along with the melting of the resin film during the laying process, and the interlayer is reinforced.

2) Compared with the traditional injection molding process, the short fiber reinforced thermoplastic resin tape prepared by the resin film hot pressing method avoids the reduction of the length of the short fiber in the injection molding shearing process, can better keep the length of the short fiber, and realizes better reinforcing effect.

3) Through the control to the blowout speed of flat mouth shower nozzle 3 and the conveying speed of conveyer belt 5, can realize the control of short fiber content, and can select fibre length, fibre direction, fibre content, fibre kind, resin kind etc. designability is strong for the shop of preparation has more application scope.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is a schematic view showing the distribution principle of short fibers in the present invention.

Fig. 3 is a partial assembly view of the conveyor belt of the present invention.

FIG. 4 is a schematic diagram of the interlayer effect of the present invention.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, fig. 2 and fig. 3, the short fiber oriented reinforced resin film interlayer device comprises a stirring barrel 1, wherein a stirring blade 2 is arranged inside the stirring barrel 1, and the stirring blade 2 realizes the dispersion of short fibers in a dispersion liquid through stirring and realizes the preset direction of the short fibers; the outlet of the stirring barrel 1 is connected with the inlet of the flat nozzle spray head 3, and the outlet of the flat nozzle spray head 3 is rectangular, so that the control of short fiber spraying amount is realized; an outlet of the flat nozzle spray head 3 is provided with an orientation baffle 4, the orientation baffle 4 and the front end face of the conveyor belt 5 form a certain angle to limit short fibers to be distributed in a certain range, and the short fibers are oriented under the combined action of the conveyor belt 5; the conveying belt of the conveying belt 5 is hollow, a groove 501 is formed in the middle of the conveying belt, a recovery groove is formed in the front end below the conveying belt to recover the dispersion liquid, and a heating flat plate 502 is arranged at the rear end below the conveying belt to evaporate the residual dispersion liquid; the rear end of the conveyor belt 5 is provided with a hot pressing roller 7, a resin film scroll support 6 is arranged above the hot pressing roller 7, the hot pressing roller 7 drives the resin film in the resin film scroll support 6 to complete a hot pressing process in the grooves 501 in which the directional short fibers are distributed, and then the conveyor belt is wound or directly enters the laying head 8 to be laid.

The stirring blade 2 is a propelling blade, so that the sufficient circulation and mixing of the short fibers and the dispersion liquid are realized; the dispersion is 75% ethanol solution, which is volatile and does not react with the short fiber.

The outlet of the flat nozzle spray head 3 is in a rectangle shape of 10mm x 3mm, and the control of the content of short fibers is realized by controlling the flow rate of the mixed liquid of the short fibers and the dispersion liquid and the speed of the conveyor belt 5.

Let the percentage of short fiber content be W, the jet speed be V, the conveyor speed be U, the width and thickness of the layup be 5mm and 1mm respectively, and the short fiber content of the impregnated layup be 10 × 3 × W V/(5 × 1 × U +10 × 3 × W) ═ 6WV/(U +6 WV).

The distance between the flat nozzle spray head 3 and the directional baffle 4 is controlled to reduce the spray pressure, so that the dispersion liquid slowly flows onto the directional baffle 4.

The directional baffle 4 is placed at an angle of 90 degrees with the plane of the conveyor belt 5, and is placed in the groove 501 of the conveyor belt 5 at a certain angle with the end face of the conveyor belt 5 so as to limit the distribution range and the fiber direction of the directional short fibers, the short fibers are distributed and limited in the width of the groove 501, and the fiber angle is limited between the direction of the directional baffle 4 and the horizontal direction, as shown in fig. 2; the wider the directing baffle 4, the smaller the angle with the end face of the conveyor belt 5, the closer the fibre direction is to the horizontal.

As shown in fig. 3, the width of the groove 501 corresponds to the width of the resin film, so as to limit the distribution range of the short fibers and maintain the shape of the impregnated tape during the forming process; the conveyor belt in the groove 501 is hollow and is provided with square small holes, so that short fibers cannot leak down.

The heating temperature of the heating flat plate 502 is 110 ℃, evaporation of the residual dispersion liquid is achieved, and the soaked paving belt is insulated to reduce deformation of the paving belt.

The width of the hot pressing roller 7 is slightly smaller than the width of the groove 502, the hot pressing roller 7 drives the resin film to move forwards, the short fibers on the conveying belt 5 are attached to the resin film, and hot pressing preparation of the short fiber oriented reinforced resin film paving belt is achieved under the combined action of the hot pressing roller 7 and the conveying belt 5.

Example (b): short fibers with required length are placed into a stirring cylinder 1, dispersion liquid is added into the stirring cylinder 1, and the short fibers are dispersed and mixed under the stirring of a stirring blade 2;

the flow velocity of the flat nozzle spray head 3 and the conveying speed of the conveying belt 5 are adjusted according to the required fiber content, and the direction range of the short fibers is controlled by the angle between the directional baffle 4 and the side surface of the conveying belt 5;

the dispersed short fibers enter the flat nozzle spray head 3 through the guide pipe, the spraying speed of the spray head is adjusted according to the distance between the flat nozzle spray head 3 and the directional baffle 4, and the sprayed short fiber mixed solution is sprayed onto the directional baffle 4 and slides onto the conveyor belt 5 below along with the directional baffle 4;

the short fiber mixed solution slides to the front end in the groove 501 of the conveyor belt, the dispersion liquid penetrates through the small holes in the hollow conveyor belt and falls into the recovery tank below, and the dispersion liquid in the recovery tank can be used for the next preparation; short fibers are left on the conveyor belt 5 under the obstruction of the small holes;

the hot-pressing roller 7 drives the resin film on the resin film reel support 6, directional short fibers are attached to the resin film when passing through the hot-pressing roller 7, the preparation of the short fiber reinforced thermoplastic resin film tape is realized under the hot-pressing effect of the hot-pressing roller 7, and the heating flat plate 502 at the rear end of the conveyor belt 5 realizes the heat preservation effect on the tape, so that the tape is prevented from being bent and warped;

and finally, winding the paving belt or directly entering the laying head 8 for laying, wherein the short fibers are mainly attached to one side of the resin film, so that the short fibers are dispersed on two sides between layers along with the melting of the resin film in the laying process, and the layers are reinforced, as shown in fig. 4.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.