阅读说明：本技术 一种用于具有凸台的模具的真空灌注导流方法 (Vacuum infusion flow guide method for mold with boss ) 是由 李义全 曹忠元 陈万康 李晓 刘平忠 于 2020-11-20 设计创作，主要内容包括：本发明涉及一种用于具有凸台的模具的真空灌注导流方法；包括如下步骤：在具有凸台的模具上依次铺设玻璃纤维布和脱模布,在脱模布的一侧边沿其长度布设抽真空管；在脱模布上铺设整体导流网,在整体导流网外边缘沿长度布设注胶管,整体导流网的其它边缘相对于玻璃纤维布对应边向内缩进5-15mm；在整体导流网上铺设局部凸台导流网,局部凸台导流网一侧边向凸台侧底边延伸,与凸台侧底边相接,局部凸台导流网的其它侧边相对于凸台的外侧边向内缩进5-15mm；通过凸台模具真空灌注导流方法的设计以解决现有技术中存在的凸台模具灌注产品,易产生包气现象,最终导致产品出现浸润不良,甚至干纱缺陷,从而影响产品表面外观,产品性能。(The invention relates to a vacuum perfusion diversion method for a mould with a boss; the method comprises the following steps: laying glass fiber cloth and demolding cloth on a mold with a boss in sequence, and laying a vacuum-pumping tube along the length of one side edge of the demolding cloth; laying an integral flow guide net on the demoulding cloth, laying a glue injection pipe on the outer edge of the integral flow guide net along the length, and retracting other edges of the integral flow guide net inwards by 5-15mm relative to the corresponding edges of the glass fiber cloth; laying a local boss flow guide net on the integral flow guide net, wherein one side edge of the local boss flow guide net extends to the bottom edge of the boss side and is connected with the bottom edge of the boss side, and the other side edges of the local boss flow guide net are retracted inwards by 5-15mm relative to the outer side edge of the boss; the design of the boss mould vacuum infusion diversion method is used for solving the problems that the boss mould infusion product in the prior art is easy to generate air inclusion phenomenon, and finally the product has poor infiltration and even yarn drying defects, so that the surface appearance and the product performance of the product are influenced.)

1. A vacuum infusion diversion method for a mold with a boss is characterized in that: the method comprises the following steps:

sequentially laying glass fiber cloth (2) and demolding cloth (3) on a mold (1) with a boss, wherein the outer side edge of the demolding cloth (3) extends 10-20mm relative to the glass fiber cloth (2);

arranging a vacuum-pumping pipe (6) along the length of one side edge of the demoulding cloth (3);

laying an integral flow guide net (4) on the demoulding cloth (3), wherein one side edge of the integral flow guide net (4) far away from the vacuumizing pipe (6) extends by 5-15mm relative to the corresponding edge of the glass fiber cloth (2), an adhesive injection pipe (5) is arranged at the outer edge of the integral flow guide net (4) extending out of the glass fiber cloth (2) along the length, two ends of the adhesive injection pipe (5) respectively extend outwards to the outer edge of the demoulding cloth (3), and other edges of the integral flow guide net (4) are retracted inwards by 5-15mm relative to the corresponding edge of the glass fiber cloth (2);

laying a local boss flow guide net (7) on the integral flow guide net (4) positioned at the boss of the die (1), wherein one side edge of the local boss flow guide net (7) adjacent to the glue injection pipe (5) extends towards the bottom edge of the boss side and is connected with the bottom edge of the boss side, and the other side edges of the local boss flow guide net (7) are retracted inwards by 5-15mm relative to the outer side edge of the boss;

sticking a vacuum sealing adhesive tape on the mold (1) along the circumferential direction of the demolding cloth (3), covering a vacuum bag film on the mold (1), sealing the outer edge of the vacuum bag film on the mold (1) through the vacuum sealing adhesive tape, communicating one end of the glue injection pipe (5) with a glue injection valve, and communicating one end of the vacuumizing pipe (6) with a vacuum valve;

the vacuumizing device is communicated with the vacuum valve to pump out air in the vacuum membrane; the glue injection device injects glue to the glue injection pipe (5) through the vacuum valve.

2. The vacuum infusion diversion method for a mold with a boss according to claim 1, wherein: the relation between the laying layer number of the local boss flow guide net (7) and the height of the boss is as follows: n is (w + h)/100, and N is an integer;

n is the number of laying layers of the local boss flow guide net on the boss, w is the width of the boss, h is the height of the boss, and the unit of the width of the boss and the unit of the height of the boss are both mm.

3. The vacuum infusion diversion method for a mold with a boss according to claim 2, wherein: when the number of the laying layers of the local boss flow guide net (7) is more than two, the circumferential edge of the local boss flow guide net (7) positioned on the upper layer is retracted inwards by 5-15mm relative to the outer edge of the local boss flow guide net (7) positioned on the adjacent lower layer.

4. The vacuum infusion diversion method for a mold with a boss according to claim 3, wherein: the number of layers of the local boss flow guide net (7) is two, and the circumferential edge of the local boss flow guide net (7) on the upper layer is retracted inwards by 10mm relative to the outer edge of the local boss flow guide net (7) on the lower layer.

5. The vacuum infusion diversion method for a mold with a boss according to claim 1, wherein: one side edge of the integral flow guide net (4) far away from the vacuumizing pipe (6) extends 10mm relative to the corresponding edge of the glass fiber cloth (2), and the other edges of the integral flow guide net (4) retract 10mm inwards relative to the corresponding edge of the glass fiber cloth (2).

6. The vacuum infusion diversion method for a mold with a boss according to claim 1, wherein: the demoulding cloth (3) is made of nylon.

7. The vacuum infusion diversion method for a mold with a boss according to claim 1, wherein: the integral flow guide net (4) and the local lug boss flow guide net (7) are made of polyethylene plastics.

8. The vacuum infusion diversion method for a mold with a boss according to claim 1, wherein: the thickness of the glass fiber cloth (2) is 8-10 mm.

9. The vacuum infusion diversion method for a mold with a boss according to claim 1, wherein: three layers of vacuum bag films are paved on the mould (1).

10. The vacuum infusion diversion method for a mold with a boss according to claim 9, wherein: the material of the vacuum bag film is nylon 66.

Technical Field

The invention relates to the technical field of composite material forming processes, in particular to a vacuum infusion flow guide method for a mold with a boss.

Background

The vacuum canning process has the advantages of no limit to the size and the appearance of the product, low preparation cost, popular and understandable process, high product performance and the like. The vacuum infusion process is applied to large composite material products, and for example, a wind power blade mould, a wind power blade, an airplane wing, a large yacht, a large customer, a train body, a locomotive and some large equipment shells are subjected to the vacuum infusion process.

With the increase of products of vacuum tank injection process, products with flange bosses and rib plates are increased, products are injected by using a mold with a large boss, after vacuumizing is completed, composite material skins, demolding cloth and vacuum materials at the lower corner position of the boss cannot be tightly attached to the mold, suspension is easy to occur, each layer of suspended material can form an annular communicated vacuum belt at the lower corner position of the boss, resin mixed glue liquid basically has no obstruction in the vacuum belt, the flow rate is fast relative to other positions, the resin mixed glue liquid at the lower corner position of the boss can quickly form a loop, gas in the loop cannot be discharged, an air inclusion phenomenon is generated, and finally poor infiltration and even dry yarn defects of the products are caused, so that the surface appearance of the products is influenced, and the product performance is improved.

Therefore, in view of the above problems, it is desirable to provide a vacuum infusion diversion method for a mold having a boss.

Disclosure of Invention

The invention aims to provide a vacuum infusion and diversion method for a mould with a boss, which solves the problems that in the prior art, a boss mould is infused with a product, resin mixed glue is basically unimpeded in a vacuum zone, the flow rate is high relative to other positions, the resin mixed glue at the lower corner position of the boss can quickly form a loop, gas in the loop cannot be discharged, the gas inclusion phenomenon is generated, and finally the product has poor infiltration and even dry yarn defects, so that the surface appearance and the product performance of the product are influenced.

The invention provides a vacuum infusion diversion method for a mould with a boss, which comprises the following steps:

laying glass fiber cloth and demolding cloth on a mold with a boss in sequence, wherein the outer side edge of the demolding cloth extends 10-20mm relative to the glass fiber cloth;

arranging a vacuum-pumping pipe at one side edge of the demolding cloth along the length of the demolding cloth;

laying an integral flow guide net on the demoulding cloth, wherein one side edge of the integral flow guide net far away from the vacuumizing tube extends 5-15mm relative to the corresponding edge of the glass fiber cloth, arranging glue injection pipes on the outer edge of the integral flow guide net extending out of the glass fiber cloth along the length, wherein two ends of each glue injection pipe extend outwards to the outer edge of the demoulding cloth, and the other edges of the integral flow guide net are retracted inwards by 5-15mm relative to the corresponding edge of the glass fiber cloth;

laying a local boss flow guide net on the integral flow guide net positioned at the boss of the mould, wherein one side edge of the local boss flow guide net adjacent to the glue injection pipe extends towards the bottom edge of the boss side and is connected with the bottom edge of the boss side, and the other side edges of the local boss flow guide net are inwardly retracted by 5-15mm relative to the outer side edge of the boss;

sticking a vacuum sealing adhesive tape on the mold along the circumferential direction of the demolding cloth, covering a vacuum bag film on the mold, sealing the outer edge of the vacuum bag film on the mold through the vacuum sealing adhesive tape, wherein one end of the glue injection pipe is communicated with a glue injection valve, and one end of the vacuumizing pipe is communicated with a vacuum valve;

the vacuumizing device is communicated with the vacuum valve to pump out air in the vacuum membrane; and the glue injection device injects glue to the glue injection pipe through the vacuum valve.

Further, the relation between the laying layer number of the local boss flow guide net and the height of the boss is as follows: n is (w + h)/100, and N is an integer;

n is the number of laying layers of the local boss flow guide net on the boss, w is the width of the boss, h is the height of the boss, and the unit of the width of the boss and the unit of the height of the boss are both mm.

Furthermore, when the number of the laying layers of the local boss flow guide net is more than two, the peripheral edge of the local boss flow guide net positioned on the upper layer is retracted inwards by 5-15mm relative to the outer edge of the local boss flow guide net positioned on the adjacent lower layer.

Furthermore, the number of the laying layers of the local boss flow guide net is two, and the peripheral edge of the local boss flow guide net positioned on the upper layer is retracted inwards by 10mm relative to the outer edge of the local boss flow guide net positioned on the lower layer.

Furthermore, one side edge of the integral flow guide net far away from the vacuumizing tube extends 10mm relative to the corresponding edge of the glass fiber cloth, and the other edges of the integral flow guide net are retracted 10mm inwards relative to the corresponding edge of the glass fiber cloth.

Furthermore, the material of the demoulding cloth is nylon.

Furthermore, the material of the whole flow guide net and the material of the local lug boss flow guide net are both polyethylene plastics.

Further, the thickness of the glass fiber cloth is 8-10 mm.

Further, three layers of vacuum bag films are paved on the mould.

Further, the material of the vacuum bag film is nylon 66.

Compared with the prior art, the vacuum infusion diversion method for the mould with the boss has the following advantages that:

1. the invention provides a vacuum infusion flow guide method for a mold with a boss, wherein a local boss flow guide net is laid on an integral flow guide net positioned at the boss of the mold, one side of the local boss flow guide net adjacent to a glue injection pipe extends towards the bottom of the boss side and is connected with the bottom of the boss side, the other side of the local boss flow guide net is retracted inwards by 5-15mm relative to the outer side of the boss, and the design of the local boss flow guide net is that one side of the local boss flow guide net extends towards the bottom of the boss side and is connected with the bottom of the boss side, so that glue solution can rapidly enter the boss, and the using amount of the glue solution above the boss is ensured; other sides of the local boss flow guide net are retracted inwards by 5-15mm relative to the outer side of the boss to form a buffer area, so that the phenomenon that glue liquid flows too fast to cause air suction blockage is prevented, the air-entrapping phenomenon of the boss in the vacuum filling process is effectively solved, the defects of poor infiltration and dry yarns of products are eliminated, the product quality is improved, the maintenance cost is saved, the scrapped risk is reduced, and the production efficiency of the products is improved.

2. The invention provides a vacuum infusion flow guide method for a mold with a boss, which is characterized in that an integral flow guide net is laid on demolding cloth, one side edge of the integral flow guide net far away from a vacuumizing tube extends 5-15mm relative to the corresponding edge of glass fiber cloth, an adhesive injection pipe is arranged on the outer edge of the integral flow guide net extending out of the glass fiber cloth along the length, two ends of the adhesive injection pipe respectively extend outwards to the outer edge of the demolding cloth, and other edges of the integral flow guide net are retracted inwards by 5-15mm relative to the corresponding edge of the glass fiber cloth, so that gradient is formed in the flow direction of adhesive liquid, the flow speed of the adhesive liquid is improved, and the production efficiency of products is improved.

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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a block diagram illustrating the steps of the vacuum infusion diversion method of the present invention;

fig. 2 is a schematic structural diagram (top view, after laying the partial boss flow guiding net) in the vacuum infusion flow guiding method of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

fig. 4 is an enlarged view at B in fig. 3.

Description of reference numerals:

1. a mold; 2. glass fiber cloth; 3. demolding the cloth; 4. an integral flow guide net; 5. a glue injection pipe; 6. Vacuumizing a tube; 7. local boss water conservancy diversion net.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

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; they may be connected directly or indirectly through intervening media, or they 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, 2, 3 and 4, the present embodiment provides a vacuum infusion diversion method for a mold having a boss, including the following steps:

s1) laying glass fiber cloth 2 and demolding cloth 3 on a mold 1 with a boss in sequence, wherein the outer side edge of the demolding cloth 3 extends 10-20mm relative to the glass fiber cloth 2;

s2) arranging a vacuum-pumping tube 6 along the length of one side edge of the demoulding cloth 3;

s3) laying an integral flow guide net 4 on the demoulding cloth 3, wherein one side edge of the integral flow guide net 4 far away from the vacuumizing pipe 6 extends 5-15mm relative to the corresponding edge of the glass fiber cloth 2, an adhesive injection pipe 5 is arranged on the outer edge of the integral flow guide net 4 extending out of the glass fiber cloth 2 along the length, two ends of the adhesive injection pipe 5 respectively extend outwards to the outer edge of the demoulding cloth 3, and the other edges of the integral flow guide net 4 retract 5-15mm inwards relative to the corresponding edge of the glass fiber cloth 2;

s4) laying a local boss flow guide net 7 on the integral flow guide net 4 positioned at the boss of the mould 1, wherein one side edge of the local boss flow guide net 7 adjacent to the glue injection pipe 5 extends to the bottom edge of the boss side and is connected with the bottom edge of the boss side, and the other side edges of the local boss flow guide net 7 are retracted inwards by 5-15mm relative to the outer side edge of the boss;

s5) sticking a vacuum sealing adhesive tape on the mold 1 along the circumferential direction of the demolding cloth 3, covering a vacuum bag film on the mold 1, sealing the outer edge of the vacuum bag film on the mold 1 through the vacuum sealing adhesive tape, communicating one end of the glue injection pipe 5 with a glue injection valve, and communicating one end of the vacuumizing pipe 6 with a vacuum valve;

s6) the vacuum-pumping device is communicated with the vacuum valve to pump out the air in the vacuum bag film; the glue injection device injects glue to the glue injection pipe 5 through the vacuum valve.

The invention provides a vacuum infusion flow guide method for a mold with a boss, wherein a local boss flow guide net 7 is laid on an integral flow guide net 4 positioned at the boss of the mold 1, one side of the local boss flow guide net 7 adjacent to a glue injection pipe 5 extends towards the bottom edge of the boss side and is connected with the bottom edge of the boss side, the other side edges of the local boss flow guide net 7 are retracted by 5-15mm inwards relative to the outer side edge of the boss, and the design of the local boss flow guide net 7 is that one side of the local boss flow guide net 7 extends towards the bottom edge of the boss side and is connected with the bottom edge of the boss side, so that glue can rapidly enter the boss, and the glue solution consumption above the boss is ensured; other sides of the local boss flow guide net 7 are retracted inwards by 5-15mm relative to the outer side of the boss to form a buffer area, so that the problem that glue liquid flows too fast to cause air suction blockage is solved, the air inclusion phenomenon of the boss in the vacuum filling process is effectively solved, the defects of poor infiltration and dry yarn of a product are eliminated, the product quality is improved, the maintenance cost is saved, the scrapped risk is reduced, and the production efficiency of the product is improved.

According to the invention, the integral flow guide net 4 is laid on the demoulding cloth 3, one side edge of the integral flow guide net 4 far away from the vacuumizing tube 6 extends 5-15mm relative to the corresponding edge of the glass fiber cloth 2, the glue injection tube 5 is laid on the outer edge of the integral flow guide net 4 extending out of the glass fiber cloth 2 along the length, two ends of the glue injection tube 5 respectively extend outwards to the outer edge of the demoulding cloth 3, and the other edges of the integral flow guide net 4 are retracted 5-15mm inwards relative to the corresponding edge of the glass fiber cloth 2, so that gradient is formed in the glue solution flowing direction, the glue solution flowing speed is increased, and the production efficiency of products is improved.

In some embodiments, the relationship between the number of laying layers of the partial boss flow guide net 7 and the height of the boss is as follows: n is (w + h)/100, and N is an integer; n is the number of laying layers of the local boss flow guide net on the boss, w is the width of the boss, h is the height of the boss, and the unit of the width of the boss and the unit of the height of the boss are both mm.

For example, a wind power blade 8 meters long and 3 meters wide is subjected to a vacuum infusion diversion method, the wind power blade is provided with 2 bosses, the height of each boss is 100mm, the length of each boss is 3000mm, the width of each boss is 80mm, based on a relational expression of the number of layers of laying of the local boss diversion net 7 and the height of each boss, N is 1, namely the number of layers of laying of the local boss diversion net on each boss is one.

For example, a semi-cylindrical carbon fiber skin product with a length of 12 meters and a radius of 3 meters is provided with a flange boss with an arc length of 750mm, a width of 650mm and a height of 10mm, based on a relational expression between the number of layers of the local boss flow guide net 7 and the height of the boss, N is 6, that is, the number of layers of the local boss flow guide net on the boss is six.

In some embodiments, when the number of the laying layers of the partial boss flow guiding net 7 is more than two, the circumferential edge of the partial boss flow guiding net 7 on the upper layer is inwardly retracted by 5-15mm relative to the outer edge of the partial boss flow guiding net 7 on the adjacent lower layer, and preferably, the circumferential edge of the partial boss flow guiding net 7 on the upper layer is inwardly retracted by 10mm relative to the outer edge of the partial boss flow guiding net 7 on the adjacent lower layer.

In some embodiments, the number of the laying layers of the partial boss flow guiding net 7 is two, and the circumferential edge of the partial boss flow guiding net 7 on the upper layer is retracted by 10mm inwards relative to the outer edge of the partial boss flow guiding net 7 on the lower layer.

In some embodiments, one side of the unitary flow guide screen 4 remote from the evacuation tube 6 extends 10mm beyond the corresponding edge of the fiberglass cloth 2, and the other edge of the unitary flow guide screen 4 is recessed 10mm inward from the corresponding edge of the fiberglass cloth 2.

The material of the demoulding cloth 3 is nylon.

The material of the integral flow guide net 4 and the local lug boss flow guide net 7 is polyethylene plastic.

The thickness of the glass fiber cloth 2 is 8-10 mm.

In the invention, three layers of vacuum bag films are paved on a mould 1.

The material of the vacuum bag film is nylon 66.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.