Method of preventing poor glue or pinholes on surface of non-autoclave vacuum bag forming composite

A composite material and non-autoclave technology, which is applied in the field of composite material molding, can solve problems such as fiber content reduction and performance impact of composite materials, and achieve the effects of reducing scrap rate, improving quality, and saving costs

Pending Publication Date: 2021-05-14
8 Cites 0 Cited by

AI-Extracted Technical Summary

Problems solved by technology

Among them, the autoclave assisted pressurization method and the method of changing the weaving form of the fabric involve major changes to the process or design, such as increasing the resin layer of the surface film or increasing the resin content in the prepreg, that is, the...
View more


The invention relates to a method of preventing poor glue or pinholes on the surface of a non-autoclave vacuum bag forming composite. The method comprises the following steps: step 1, duplicating a prepreg; step 2, arranging a breathable felt, a vacuum nozzle and a vacuum detection meter on a flat plate mold by using the duplicated prepreg, manufacturing a vacuum bag, and conducting vacuumizing for compacting; step 3, removing back lining paper from the compacted prepreg, and laying and pasting a non-porous isolating membrane or a peel ply by fitting the flat plate mold; and step 4, conducting follow-up layer laying and pasting, manufacturing a vacuum bags, and conducting solidification forming. By using the method disclosed by the invention, on the basis without changing an original structure, a process design and a material system, the problem of poor glue or pinholes on the surface of the forming composite is solved, the quality of a product is improved, the rejection rate is reduced, and the cost is saved.

Technology Topic

Polymer chemistrySlip sheet +4


  • Method of preventing poor glue or pinholes on surface of non-autoclave vacuum bag forming composite
  • Method of preventing poor glue or pinholes on surface of non-autoclave vacuum bag forming composite


  • Experimental program(1)

Example Embodiment

[0025]In order to better understand the technical solution of the present invention, the present invention includes, but is not limited to, in particular, similar techniques and methods, similar techniques and methods should be considered within the scope of the invention. In order to make the technical problems, technical solutions and advantages to solve the present invention more clearly, and will be described in detail below with reference to the accompanying drawings and specific examples.
[0026]It should be clear that the embodiments described herein are merely the embodiments of the invention, not all of the embodiments. Based on the embodiments in the present invention, those of ordinary skill in the art will belong to the scope of the present invention in the scope of the present invention without any other embodiments obtained without creative labor.
[0027]The terms used in the embodiments of the present invention are for purposes of describing particular embodiments, not intended to limit the invention. "One", "one", "one", "" ",", "" "and" "" as used in the embodiments of the invention and the appended claims, are also intended to include other forms unless otherwise clearly indicated by the context.
[0028]byFigure 1 - Figure 2As shown, the present invention prevents the surface of the non-thermal tank vacuum bag molding composite surface of the upper surface, wherein the raw materials or components used in the method step include non-thermal tank prepreg back liner 1, non-heat Pressure tank prepreg body material 2, non-thermal compressor tank prepreg ingredients 3, non-porous isolation film or demolding cloth 4, breathable felt 5, flushing plate mold 6, vacuum bag 7, vacuum mouth 8, vacuum detection table 9. Seefigure 2 The preparation process includes the following steps: the first step, the flush prepreg: the original isolation film 3 of the non-thermal compression tank prepreg body material 2 is replaced with a non-porous isolation film that matches the curing process or off. The module 4, bond the non-thermal compression canister or the release cloth 4 with the non-thermal tank prepreg, and the surface is required to be smooth, which can be combined, or in advance using vacuum adsorption. The non-thermally prepared film or release cloth 4 is applied to the platform, and then the non-thermal tank prepreg is bonded to it, and the original prepreg backing paper 1 is retained during the bonding process. The non-porous isolation film or the release cloth 4 temperature is 10 ° C, and the thickness is not more than 0.1 mm, the thickness is not more than 0.1 mm, the surface is flat - free pleat, and the adhesive isolation film is selected according to the surface of the composite. The cloth is selected when the surface gloss of the composite is selected, and the release cloth is selected when matte in the surface of the composite material;
[0029]In the second step, the prefiltration of the first step is disposed on the flat plate mold 6, the vacuum nozzle 8, and the vacuum detection table 9, the vacuum bag 7 evacuated to compact, so that the non-porous isolation film Or the release cloth 4 is good in combination with the preparation to make it no slip or wrinkles during the curved surface; the vacuum to the vacuum is not less than 80 kPa during the compaction process, and the compaction time is not less than 15min;
[0030]In the third step, the first layer is fixed, the compacted prepreg removing the backing paper 1, the non-porous isolation membrane or the release cloth 4 is laid in the plate mold 6, in the paving area external pressure sensitive adhesive to prevent slipping shift;
[0031]In the fourth step, subsequent layoffs, fax vacuum bag 7 and solidification, curing during curing, the vacuum degree during the curing process is above 90 kPa, and the resin viscosity is above the glass transition temperature during the curing process Lower, it can be held during phase 30min to increase liquidity.
[0032]More detailed description of the non-thermal tank vacuum bag forming method for preventing the surface of the problem of the surface of the problem of the surface of the composite material is provided. Description of the above embodiment is only used to help understand the method of the present application and its core idea; at the same time, there will be changes in terms of the specific embodiments and applications for the purposes of the present invention. In summary, the contents of this specification should not be construed as limiting the present application.
[0033]Some vocabulary is used in the specification and claims to refer to specific components. Those skilled in the art will appreciate that hardware manufacturers may call with different nouns. The present specification and the claims are not as different from the differential differences, but as a differential difference between the components in functionality. As mentioned in the "included" "included" as mentioned in the articles and claims, "including" is an open term, so that "includes / include, but not limited to". "Rough" means that in the range of error, those skilled in the art can solve the technical problem within a certain error range, which is basically reached the technical effect. The description is described later in practice the preferred embodiment of the present application, and the description is intended to illustrate the scope of the present application. The scope of protection of this application is subject to the definition of the appended claims.
[0034]It will also be noted that the terms "including", "comprising" or any other variable is intended to cover non-exclusive contained container, so that a product or system including a series of elements includes not only those elements, but also not clearly listed. Other elements, or elements that are also inherent to this item or system. In the absence of more restrictions, the elements defined by the statement "include a ...", and do not exclude additional same elements in the goods or systems including the elements.
[0035]It should be understood that the terms "and / or" as used herein are merely a correlation relationship to the associated object, indicating that there are three relationships, such as A and / or B, which may be represented: Alone A, at the same time B, there is three cases of B alone. In addition, the characters "/" in this article generally indicate that the front and rear association objects are a "or" relationship.
[0036]The above description shows and describes a number of preferred embodiments of the present application, but as previously described, the present application is not limited to the form disclosed herein, and should not be regarded as the exclusion of other embodiments, and can be used for each Other combinations, modifications, and environments, and can be modified by techniques or knowledge in the above teachings or related fields within the scope of the application contemplation herein. The changes and variations carried out by those skilledily, from the spirit and scope of the present application, the scope of the claims according to the appended claims.


Thickness<= 0.1mm

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.

Similar technology patents

Data generation method and system

ActiveCN103186639AImprove entry efficiencyquality improvement

Device for performing surface treatment on pole piece of lithium battery

InactiveCN102151665Aquality improvementReduce short circuit rate

Jujube tree grafting method

InactiveCN103070025Aprevent dehydrationquality improvement

High-yield pollution-free breeding method of freshwater fish


Friction-stir welding equipment

ActiveCN104985320Aquality improvementReduce torsional or impact forces

Classification and recommendation of technical efficacy words

Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products