阅读说明：本技术 一种用于制备短切纤维预混料的浸渍装置及其方法 (Impregnation device and method for preparing chopped fiber premix ) 是由 陈志诚 李世成 李涛 史文锋 沈辉 谢钟清 刘启抱 常舰 周科旭 叶鹏华 贾娜 于 2020-12-08 设计创作，主要内容包括：本发明公开了一种用于制备短切纤维预混料的浸渍装置,所述浸渍装置包括：制备系统,其包括储料桶以及与储料桶管路连接的注胶桶,储料桶与注胶桶内储存有第一物料,其中,注胶桶与控制系统连接,以定量控制注胶桶内的第一物料的注胶量；金属平台,其内铺设有第二物料,金属平台底部设有出胶口以及进胶口,其中,第一物料通过进胶口注入金属平台内与第二物料混合后形成短切纤维预混料,其由出胶口流出,流出的短切纤维预混料通过管路流入与金属平台管路连接的集液桶内；密封薄膜以及控制系统。此外,本发明还公开了一种用于制备短切纤维预混料的浸渍方法。该浸渍装置及方法提高了所获得的短切纤维预混料的浸渍效果,缩短混合时间,提高工作效率。(The invention discloses a dipping device for preparing a chopped fiber premix, which comprises: the preparation system comprises a storage barrel and a glue injection barrel connected with the storage barrel through a pipeline, wherein first materials are stored in the storage barrel and the glue injection barrel, and the glue injection barrel is connected with the control system so as to quantitatively control the glue injection amount of the first materials in the glue injection barrel; the metal platform is internally laid with a second material, and the bottom of the metal platform is provided with a glue outlet and a glue inlet, wherein the first material is injected into the metal platform through the glue inlet and is mixed with the second material to form a short-cut fiber premix which flows out from the glue outlet, and the flowing short-cut fiber premix flows into a liquid collecting barrel connected with a metal platform pipeline through a pipeline; sealing membrane and control system. In addition, the invention also discloses an impregnation method for preparing the chopped fiber premix. The impregnation device and the impregnation method improve the impregnation effect of the obtained chopped fiber premix, shorten the mixing time and improve the working efficiency.)

1. An impregnation apparatus for preparing a chopped fiber premix, comprising:

the preparation system comprises a storage barrel (4) and a glue injection barrel (6) connected with the storage barrel (4) through a pipeline, first materials are stored in the storage barrel (4) and the glue injection barrel (6), and the glue injection barrel (6) is connected with a control system so as to quantitatively control the glue injection amount of the first materials in the glue injection barrel (6);

the metal platform (12), the second material is laid in the metal platform (12), the bottom of the metal platform (12) is provided with a glue outlet and a glue inlet, wherein the first material is injected into the metal platform (12) through the glue inlet and is mixed with the second material to form a chopped fiber premix, the chopped fiber premix flows out from the glue outlet, and the flowed chopped fiber premix flows into a liquid collecting barrel (8) connected with the metal platform (12) through a pipeline;

the sealing film (13) is connected with the metal platform (12) in a sealing mode to form a flexible cavity, and the volume of the flexible cavity changes along with the change of the glue injection quantity of the injected first material;

and the control system (2) comprises a flow path control device for controlling the flow of the first material, a vacuum pump (9) for controlling the vacuum degree in the flexible cavity, an electronic scale (7) for weighing the first material and the second material, and an automatic control device electrically connected with the flow path control device, the gas path control device and the electronic scale (7).

2. The impregnation apparatus according to claim 1, wherein the flow path control device includes:

the pump (5) is arranged on a connecting pipeline between the storage barrel (4) and the glue injection barrel (6) so as to control the first material to flow into the glue injection barrel (6) from the storage barrel (4);

and the pressurizing system is connected with the glue injection barrel (6), and pressurizes the glue injection barrel (6) so as to control the glue injection amount of the first material in the glue injection barrel (6) when injecting glue into the metal platform (12).

3. Impregnation device according to claim 2, characterized in that the pressurization system comprises a gas source and a pressure relief valve (1), wherein the gas source is a compressed air source.

4. An impregnation device according to claim 2, characterized in that the pump (5) is a metering gear pump.

5. The steeping device as claimed in claim 1, further comprising a stirrer (10), wherein the stirrer (10) is provided in the storage tank (4) and the glue injection tank (6), respectively.

6. A steeping device as claimed in claim 1, further comprising a lifting cylinder, wherein the lifting cylinder (3) is connected with the first sealing cover (41) of the storage barrel (4), the second sealing cover (61) of the glue injection barrel (6) and the control system respectively, and the control system controls the lifting cylinder (3) to act to open or close the first sealing cover (41) and/or the second sealing cover (61).

7. A steeping device as claimed in claim 1, further comprising a sealing film lifting system for controlling a lifting action of the sealing film (13), comprising:

a gantry bridge (14);

the platform lifting cylinder (11) is arranged on the gantry bridge (14), and a pneumatic piece of the platform lifting cylinder moves along the height direction of the gantry bridge (14);

the tail end of a pneumatic piece of the platform lifting cylinder (11) is provided with a frame type pressing ring (110), and the sealing film (13) is arranged on the frame type pressing ring.

8. A steeping device as claimed in claim 7, wherein the gantry bridge (14) is provided with positioning pins to limit a moving distance of the platform elevating cylinder (11).

9. A steeping device as claimed in claim 7, wherein the sealing film lifting system comprises at least one platform lifting cylinder (11).

10. An impregnation method for preparing a chopped fiber premix, characterized in that the impregnation method adopts the impregnation device as claimed in any one of claims 1 to 9 to obtain the chopped fiber premix.

Technical Field

The invention relates to a pretreatment device and a method of premix, in particular to a dipping device and a method of premix, and in particular relates to a dipping device and a method for preparing chopped fiber premix.

Background

Composite materials have found widespread use in many applications because of the many properties that are not possessed by a single material. Generally, the preparation process of polymer-based composite materials includes a one-step process and a two-step process, wherein the two-step process comprises mixing and impregnating fiber resins in advance to form a semi-finished product, and then forming a composite material product from the semi-finished product. The chopped fibers and the resin are mixed to form a semi-finished product, namely the composite material premix. The prior chopped fiber premix is prepared by firstly chopping fibers, then uniformly stirring the chopped fibers and resin and then carrying out heat treatment, and the premix prepared by the method has the defects of unstable quality, low production efficiency, poor production environment, harm to human bodies and the like due to the large use of manual operation.

Through the search of the prior patent documents, the following results are found:

for example, chinese patent publication No. CN110576626A, published as 12/17/2019, entitled "method for preparing premix for composite material" discloses a method for preparing premix for composite material. It is to be noted, however, that the technical solution disclosed in this patent document does not relate to the improvement of the process and equipment for the impregnation of fibers and resins.

For another example, chinese patent document CN110576624A, published as 12.17.2019, entitled "a method for producing a chopped fiber premix" discloses a method for producing a chopped fiber premix. In the technical solution disclosed in this patent document, it mainly includes: uniformly laying the fibers and the flow guide net on a plane; pumping the sealed bag to a vacuum state by a vacuum source; injecting quantitative glue solution into the sealing bag through a pressurizing glue injection device to be mixed with the fibers; and carrying out heat treatment and short cutting on the mixed mixture to prepare the short fiber premix. The invention adopts a vacuum diversion mode to mix the fiber and the resin, ensures the uniform mixing of the fiber and the resin and avoids the condition that the fiber is not completely infiltrated; resin is injected by adopting a pressurized injection mode, so that the glue injection time can be greatly reduced; the pressure in the sealing bag can be adjusted by pressurizing the outside of the sealing bag by compressed air, and the gel content of the premix can be controlled; the heat treatment method can remove unnecessary volatile components in the premix, thereby improving the internal quality of the composite material prepared from the premix. It is to be noted, however, that the technical solution disclosed in this patent document does not relate to the improvement of the process and equipment for the impregnation of fibers and resins.

It can thus be seen that there is a lack of equipment on the market that satisfies the impregnation process for chopped fibre premix. The difficulty lies in that: firstly, the existing equipment is not provided with a pressurizing glue injection leading-in device, so that the glue injection speed is insufficient; secondly, the existing equipment usually adopts a rigid closed space or a mold, which can cause the unfilled part of the fiber to be the aggregation of the resin, so that the resin is rich, and the control of the resin content is inaccurate.

In addition, although there is a schematic diagram of the apparatus in the above-mentioned comparison document, there are certain problems in the specific implementation process, for example, the simple use of the silicone membrane can naturally form vacuum sealing under vacuum adsorption, but carbon fiber will adhere to the surface of the silicone membrane during the production process, the sealing effect is not good after several uses, the silicone membrane is easy to warp and leak gas, the present invention adopts the cylinder and the frame type device for pressurization, the sealing effect is good, the operation is simple, and there is no risk of gas leakage after long-term use.

Moreover, the above-mentioned reference does not relate to how to realize the quantitative weighing of glue solution, and it has the problem that glue needs to be prepared separately every time, so the whole preparation process is time-consuming and labor-consuming.

Based on the above, the impregnation device and the impregnation method for preparing the chopped fiber premix are expected to be obtained, the impregnation device and the impregnation method can be used for adding a large amount of glue solution and solvent into the glue storage tank, uniformly stirring the glue solution at one time, configuring a large amount of glue solution at one time, and realizing rapid quantitative weighing of the glue solution through the metering pump and the electronic scale at the bottom of the glue injection tank, so that the impregnation effect of the obtained chopped fiber premix is improved, the mixing time is shortened, and the working efficiency is improved. In addition, the dipping device and the dipping method can realize the lifting, locking and sealing of the cover body by adopting the air cylinder, and have simple and effective operation.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the impregnation device and the impregnation method for preparing the chopped fiber premix, which can improve the impregnation effect of the chopped fiber premix and realize accurate quantitative glue injection in the glue injection process. In addition, the dipping device and the method can shorten the mixing time of the premix, improve the working efficiency and have convenient automatic operation.

In order to achieve the above object, the present invention provides an impregnation apparatus for preparing a chopped strand premix, the impregnation apparatus comprising:

the preparation system comprises a storage barrel and a glue injection barrel connected with the storage barrel through a pipeline, wherein first materials are stored in the storage barrel and the glue injection barrel, and the glue injection barrel is connected with a control system so as to quantitatively control the glue injection amount of the first materials in the glue injection barrel;

the metal platform is internally paved with a second material, and the bottom of the metal platform is provided with a glue outlet and a glue inlet, wherein the first material is injected into the metal platform through the glue inlet and is mixed with the second material to form a short-cut fiber premix which flows out from the glue outlet, and the flowing short-cut fiber premix flows into a liquid collecting barrel connected with a metal platform pipeline through a pipeline;

the sealing film is connected with the metal platform in a sealing mode to form a flexible cavity, the volume of the flexible cavity changes along with the change of the glue injection quantity of the injected first material, and the outer surface layer of the flexible cavity is formed by the sealing film;

and the control system comprises a flow path control device for controlling the flow of the first material, a gas path control device for controlling the vacuum degree in the flexible cavity, an electronic scale for weighing the mass of the first material and the mass of the second material, and an automatic control device electrically connected with the flow path control device, the gas path control device and the electronic scale.

In the technical scheme of the invention, the flow path control device of the control system controls the glue injection amount of the first material in the glue injection barrel when the first material enters the metal platform, and particularly, the injection amount of the first material can be calculated through the pressurizing device so as to quantitatively and accurately inject the first material.

In addition, a sealing bag can be conveniently and rapidly obtained through a flexible cavity formed by the sealing film and the metal platform, so that the sealing bag is not required to be obtained through a composite material forming process in the prior art, and the preparation efficiency of the impregnation device is improved. In particular, the prior art needs to adopt complicated and tedious processes to obtain the sealing bag, such as preparing the sealing bag by using the sealing rubber strip and the vacuum bag, which inevitably complicates the process flow of the prior art and reduces the efficiency.

In addition, in the technical scheme of the invention, the electronic scale is matched with the flow path control device, so that the first material required by preparation is accurately weighed, and the first material is quantitatively injected into the metal platform by controlling the process parameters through the automatic control device.

Furthermore, in the technical scheme of the invention, the gas circuit control device can comprise a vacuum pump to control the vacuum degree in the flexible cavity and ensure the negative pressure in the flexible cavity.

In some preferred embodiments, the sealing film is a silicone film.

Preferably, glue is discharged from the bottom of the storage barrel, the bottom of the storage barrel is arc-shaped, the whole barrel body of the storage barrel is made of stainless steel, and the pressure resistance is not lower than 0.2 MPa. The first sealed lid of storage vat is equipped with the rubber circle with the connecting portion of ladle body and seals.

More preferably, the storage barrel is also provided with an exhaust valve.

More preferably, the storage vat is further provided with a liquid level display device to display the liquid level.

Preferably, glue is discharged from the bottom of the glue injection barrel, the bottom of the glue injection barrel is arc-shaped, the whole barrel body of the glue injection barrel is made of stainless steel, and the pressure resistance is not lower than 0.2 MPa. And a rubber ring is arranged at the connecting part of the second sealing cover of the glue injection barrel and the barrel body for sealing.

More preferably, the glue injection barrel is further provided with an exhaust valve.

More preferably, the glue injection barrel is further provided with a liquid level display device to display the liquid level.

Preferably, the liquid collecting barrel connector is arranged at the top, the barrel body of the liquid collecting barrel is made of stainless steel, and the pressure resistance is not lower than 0.2 MPa. The connecting part of the cover body and the barrel body of the liquid collecting barrel is sealed by a rubber ring.

More preferably, the liquid collecting barrel is also provided with an exhaust valve.

More preferably, the liquid collecting barrel is further provided with a vacuum pressure gauge to display vacuum pressure in the liquid collecting barrel.

In the technical scheme of the invention, the first material is resin, and the second material is fiber.

Preferably, the flow path control device includes:

the pump is arranged on a connecting pipeline of the storage barrel and the glue injection barrel so as to control the first material to flow into the glue injection barrel from the storage barrel;

and the pressurizing system is connected with the glue injection barrel and pressurizes the glue injection barrel so as to control the glue injection amount of the first material in the glue injection barrel when the first material is injected into the metal platform.

Preferably, the pressurization system comprises a gas source and a pressure relief valve, wherein the gas source is a compressed air source.

Preferably, the pump is a metered gear pump.

Preferably, the steeping device further comprises a stirrer, the stirrer is respectively arranged in the material storage barrel and the glue injection barrel, and the stirrer is used for fully stirring.

More preferably, the stirrer adopts pneumatic stirring, the rotating speed is 0-3000 r/min, and the rotating speed is adjustable.

Preferably, the dipping device further comprises a lifting cylinder, the lifting cylinder is respectively connected with the first sealing cover of the storage barrel, the second sealing cover of the glue injection barrel and the control system, and the control system controls the lifting cylinder to act so as to open or close the first sealing cover and/or the second sealing cover.

Preferably, the dipping apparatus further includes a sealing film lifting system for controlling a lifting motion of the sealing film, and the dipping apparatus includes:

a gantry bridge frame;

the platform lifting cylinder is arranged on the gantry bridge, and a pneumatic part of the platform lifting cylinder moves along the height direction of the gantry bridge;

the tail end of a pneumatic piece of the platform lifting cylinder is provided with a frame type pressing ring, and the sealing film is arranged on the frame type pressing ring.

More preferably, the sealing film is pressed on the frame type pressing ring, so that the frame type pressing ring moves along the height direction of the gantry bridge along with the pneumatic piece of the platform lifting cylinder, and when the pneumatic piece of the platform lifting cylinder moves to the position with the maximum stroke, the frame type pressing ring presses the contact part between the sealing film and the metal platform.

The frame type pressing ring is beneficial to replacement. In some embodiments, the frame-type clamp ring is made of aluminum alloy.

In addition, more preferably, the frame type pressing ring is connected with the platform lifting cylinder by using screws.

Preferably, a positioning pin is arranged on the gantry bridge frame to limit the moving distance of the platform lifting cylinder.

Preferably, the sealing film lifting system comprises at least one platform lifting cylinder.

More preferably, the platform lifting cylinder can be set to be 2 or 4. Platform lift cylinder equipartition is placed, for example: can be uniformly arranged along the central shaft of the gantry crane span structure.

Preferably, in the technical scheme of the invention, the pipelines are connected by rubber pipes, and the connecting parts adopt adapters.

More preferably, the pressure regulating range of a regulating valve of the vacuum pump is 0-0.7 MPa, and the precision requirement is 0.01 MPa.

Preferably, the electronic scale and the glue injection barrel are connected through screws, and the precision is not lower than 1 g.

More preferably, the metal platform is made of stainless steel.

In some embodiments, preferably, the glue inlet of the metal platform is disposed at a central position of the metal platform, and the glue outlet is disposed at two sides of the glue inlet. The outer edge position of the glue inlet is provided with a groove, and a silica gel sealing ring is arranged at the contact position of the periphery of the groove and the sealing film so as to improve the sealing effect.

Preferably, the platform lifting cylinder is connected with the gantry bridge through screws.

Preferably, the ultimate vacuum degree of the vacuum pump is less than or equal to-0.095 MPa, and a two-way valve can be arranged to control the connection and disconnection of the vacuum pumping function.

Preferably, the control system is connected with an electronic scale, a pump, a vacuum pump, a cylinder and a lifting cylinder for the platform, so that the functions of real-time monitoring of all parameters and automatic control of specific functions are realized.

Accordingly, another object of the present invention is to provide an impregnation method for preparing a chopped fiber premix, which obtains the chopped fiber premix using the above impregnation apparatus.

Compared with the prior art, the impregnation device and the method for preparing the chopped fiber premix have the advantages and beneficial effects as follows:

1. the scheme can realize accurate effective positioning, shortens the time that the chopped fiber premix adds the die cavity, stops the die damage and introduces the risk of goods with metal inclusion.

2. The scheme can realize improving the dipping effect of the chopped fiber premix, and can realize accurate quantitative glue injection in the glue injection process.

3. The present case can realize improving work efficiency, and automated operation is more convenient.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic structural view of an impregnation apparatus for preparing a chopped strand premix according to the present invention in some embodiments;

reference numerals:

the device comprises a pressure reducing valve 1, a control system 2, a lifting cylinder 3, a storage tank 4, a pump 5, a glue injection tank 6, an electronic scale 7, a liquid collecting tank 8, a vacuum pump 9, a stirrer 10, a lifting cylinder 11 for a platform, a metal platform 12, a sealing film 13, a gantry bridge 14, a frame type pressing ring 110, a first sealing cover 41 and a second sealing cover 61.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

Example 1

As shown in fig. 1, in the present embodiment, the impregnation apparatus for preparing the chopped fiber premix includes: a preparation system, a metal platform 12, a sealing film 13 and a control system.

The preparation system comprises a storage barrel 4 and a glue injection barrel 6 connected with the storage barrel 4 through pipelines, wherein first materials are stored in the storage barrel 4 and the glue injection barrel 6, and the first materials are resin in the scheme.

As can be seen by further referring to fig. 1, an electronic scale 7 is disposed at the bottom of the glue injection barrel 6. The pressure reducing valve 1, the lifting cylinder 3, the stirrer 10, the storage barrel 4, the glue injection barrel 6, the pump 5 and the electronic scale 7 are matched with each other and used for quantitatively injecting resin into the metal platform 12 at a certain pressure.

Specifically, the pressure reducing valve 1 is connected to a compressed air source to regulate the source pressure. And the lifting cylinder 3 is used for controlling the opening and closing of the first sealing cover 41 of the storage barrel 4 and the second sealing cover 61 of the glue injection barrel 6. In order to sufficiently dissolve the resin, the dipping device in this embodiment is provided with a stirrer 10, and the stirrers 10 are respectively disposed in the storage tank 4 and the glue injection tank 6. The stirrer 10 adopts pneumatic stirring, the rotating speed is 0-3000 r/min, and the rotating speed is adjustable. The electronic scale 7 is connected with the glue injection barrel 6 through screws, and the precision is not lower than 1 g.

The pump 5 is used to transfer the resin in the storage vat 4 to the glue injection vat 6. The pipeline between the glue injection barrel 6 and the storage barrel 4 is connected through a rubber pipe, and the joint of the rubber pipe and the equipment can be connected through an adapter. The pump 5 is preferably a metering gear pump.

A second material, in this case a fiber, is laid within the metal platform 12. The bottom of the metal platform 12 is provided with a glue outlet and a glue inlet, wherein the first material is injected into the metal platform 12 through the glue inlet and is mixed with the second material to form a chopped fiber premix, the chopped fiber premix flows out from the glue outlet, and the flowing chopped fiber premix flows into a liquid collecting barrel 8 connected with the metal platform 12 through a pipeline;

the sealing film 13 is connected with the metal platform 12 in a sealing mode to form a flexible cavity, the volume of the flexible cavity changes along with the change of the glue injection quantity of the injected first material, and the outer surface layer of the flexible cavity is formed by the sealing film 13.

Referring to fig. 1, the platform lifting cylinder 11 is disposed on the gantry bridge 14, the frame type clamping ring 110 is disposed at the end of the pneumatic element of the platform lifting cylinder 11, and the sealing film 13 is disposed on the frame type clamping ring 110.

The sealing film 13 is pressed on the frame type pressing ring 110, therefore, the frame type pressing ring 110 moves along the height direction of the gantry bridge 14 along with the pneumatic piece of the platform lifting cylinder 11, and when the pneumatic piece of the platform lifting cylinder 11 moves to the maximum stroke position, the frame type pressing ring 110 realizes the pressing of the contact part between the sealing film 13 and the metal platform 12.

In some preferred embodiments, the sealing film 13 is a silicone film.

As can be seen by further referring to fig. 1, the glue is discharged from the bottom of the storage vat 4, the bottom of the storage vat 4 is arc-shaped, the whole body of the storage vat 4 is made of stainless steel, and the pressure resistance is not lower than 0.2 MPa. The connecting part of the first sealing cover 41 of the storage barrel 4 and the barrel body is provided with a rubber ring for sealing. In some preferred embodiments, the storage tank 4 may also be provided with a vent valve. The storage vat 4 is also provided with a liquid level display device to display the liquid level.

In addition, glue is discharged from the bottom of the glue injection barrel 6, the bottom of the glue injection barrel 6 is arc-shaped, the whole barrel body of the glue injection barrel 6 is made of stainless steel, and the pressure resistance is not lower than 0.2 MPa. The connecting part of the second sealing cover 61 of the glue injection barrel 6 and the barrel body is provided with a rubber ring for sealing. In some preferred embodiments, the glue injection barrel 6 may also be provided with an exhaust valve. The glue injection barrel 6 is also provided with a liquid level display device to display the liquid level.

Moreover, the interface of the liquid collecting barrel 8 is arranged at the top, the barrel body of the liquid collecting barrel 8 is made of stainless steel, and the pressure resistance is not lower than 0.2 MPa. The connecting part of the cover body and the barrel body of the liquid collecting barrel 8 is sealed by a rubber ring. In some preferred embodiments, the sump 8 is also provided with a vent valve. In addition, the liquid collecting barrel 8 is also provided with a vacuum pressure gauge to display the vacuum pressure in the liquid collecting barrel 8.

The control system 2 comprises a flow path control device for controlling the flow of the first material, a vacuum pump 9 for controlling the vacuum degree in the flexible cavity, an electronic scale 7 for weighing the first material and the second material, and an automatic control device electrically connected with the flow path control device, the gas path control device and the electronic scale 7.

The flow path control device is composed of a pump 5 and a pressurizing system, wherein the pump 5 is arranged on a connecting pipeline of the storage barrel 4 and the glue injection barrel 6 so as to control the first material to flow into the glue injection barrel 6 from the storage barrel 4. The refueling system is composed of a pressure reducing valve 1 and a compressed air source, and the pressure of gas output by the air source is controlled by adjusting the pressure reducing valve 1 so as to pressurize the inside of the glue injection barrel 6, thereby adjusting the glue injection amount of the first material in the glue injection barrel 6 when injecting glue to the metal platform 12.

The vacuum degree in the flexible cavity can be controlled by the vacuum pump 9, the vacuum pump 9 vacuumizes the sealed space (namely the flexible cavity) formed by the sealing film 13 and the metal platform 12 to ensure negative pressure, the ultimate vacuum degree of the vacuum pump 9 is less than or equal to-0.095 MPa, and the vacuum pump 9 can adopt a vacuum pump with a two-way valve in order to control the connection and disconnection of the vacuum pumping function. The pressure regulating range of a regulating valve of the vacuum pump 9 is 0-0.7 MPa, and the precision requirement is 0.01 MPa.

In some embodiments, the processing device of the control system 2 may be electrically connected to the electronic scale, the pump 5, the vacuum pump 9, the lift cylinder 3, and the platform lift cylinder 11 to enable real-time monitoring of all parameters and automated control of specific functions.

The number of the platform lifting cylinders 11 can be 2 or 4. 11 equipartitions of platform lift cylinder are placed, for example: can be evenly arranged along the central shaft of the gantry crane span structure 12.

It should be noted that the glue inlet of the metal platform 12 is disposed at the center of the metal platform 12, and the glue outlet is disposed at two sides of the glue inlet. The outer edge of the glue inlet is provided with a groove, and a silica gel sealing ring is arranged at the contact part of the periphery of the groove and the sealing film 13 so as to improve the sealing effect.

The platform lifting cylinder 11 is connected with the gantry bridge 14 through screws.

A method of impregnation using the impregnation apparatus for preparing a chopped strand premix in the present embodiment will be described with reference to fig. 1:

1. first material is injected into glue injection tank

S1, controlling the lifting cylinder 3 to open the first sealing cover 41 of the storage barrel 4, pouring the prepared 30kg of resin, controlling the lifting cylinder 3 to close the first sealing cover 41 of the storage barrel, starting the stirrer 10, and rotating at a speed of 100 rpm;

s2, clamping a rubber tube connected between the rubber injection barrel 6 and the metal platform 12 by a tube clamp;

s3, starting a metering gear pump, and injecting 2.0kg of resin into a glue injection barrel;

2. preparing fibers:

s4, weighing 2.0kg of carbon fiber by using an electronic scale 7;

s5, laying the fibers in the grooves of the metal platform 12, and uniformly and symmetrically arranging the fibers;

s6, pressing and installing the sealing film 13 and the frame type pressing ring 110 in place, starting the platform lifting cylinder 11, moving the sealing film 13 and the frame type pressing ring 110 together until the sealing film 13 and the frame type pressing ring are pressed and sealed with the metal platform 12;

s7, opening the vacuum pump 9, pumping out the air in the sealing film 13 until the vacuum degree is less than or equal to-0.095 MPa, and keeping the air-tight state for 5 min.

3. Glue injection

S8, adjusting the pressure of the adjusting valve of the vacuum pump 9 to 0.1 MPa;

s9, opening a rubber tube connected between the rubber injection barrel 6 and the metal platform 12 by using a tube clamp;

s10, after 2.0kg of resin is injected into the metal platform 12, adjusting an adjusting valve of the vacuum pump 9;

s11, continuously vacuumizing until the resin completely impregnates the fibers;

s12, the vacuum system is turned off, the frame-type clamp ring 110 is opened, and the material is taken out.

It should be noted that the prior art in the protection scope of the present invention is not limited to the examples given in the present application, and all the prior art which is not inconsistent with the technical scheme of the present invention, including but not limited to the prior patent documents, the prior publications and the like, can be included in the protection scope of the present invention.

In addition, the combination of the features in the present application is not limited to the combination described in the claims of the present application or the combination described in the embodiments, and all the features described in the present application may be freely combined or combined in any manner unless contradictory to each other.

It should also be noted that the above-mentioned embodiments are only specific embodiments of the present invention. It is apparent that the present invention is not limited to the above embodiments and similar changes or modifications can be easily made by those skilled in the art from the disclosure of the present invention and shall fall within the scope of the present invention.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.