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Integral forming method of LCM (Liquid Crystal Module) with complex structure workpiece and workpiece

A technology of overall forming and complex structure, applied in the field of LCM, can solve complex problems, achieve long production cycle, improve slow fiber infiltration speed, and ensure dimensional accuracy

Pending Publication Date: 2022-05-31
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a method for integrally forming LCM parts with complex structures and the parts. Fiber or discontinuous fiber, and then lay continuous fiber or fiber felt in the main structure, thus solving the technical problems of complex structures such as joints, buckles, positioning columns, etc. that are difficult to form integrally

Method used

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  • Integral forming method of LCM (Liquid Crystal Module) with complex structure workpiece and workpiece
  • Integral forming method of LCM (Liquid Crystal Module) with complex structure workpiece and workpiece
  • Integral forming method of LCM (Liquid Crystal Module) with complex structure workpiece and workpiece

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Embodiment 1

[0046] In this embodiment, the mold structure see image 3 and Figure 4 , wherein the first lower film 3 includes grooves 4 and positioning columns 5; the first upper mold 6 includes injection ports 7, exhaust ports 8, sealing grooves 9 and positioning holes 10. Wherein groove 4 is the characteristic structure of this mould.

[0047] Such as figure 1 As shown, the specific process of using the resin transfer molding process to produce parts with ribs is as follows:

[0048] 1) Lay T964 continuous glass fiber in the groove in the lower mold, and then lay 16 pieces of cut EBX1200 (+45 / -45) EP biaxial glass fiber cloth (60cm×40cm) layer by layer in the mold cavity middle.

[0049] 2) Paste sealant in the sealing groove of the upper mold, and then close the mold.

[0050] 3) Take SWANCOR 2511-1A epoxy resin, 2511-1BS curing agent, 1800g in total, mix evenly at 30°C according to the ratio of 10:3, connect the injection port with the resin through a catheter, open the injectio...

Embodiment 2

[0054] In this embodiment, the mold structure is as Figure 7 As shown, the second lower membrane 13 includes a buckled cavity 14 and a positioning post 15 . The cavity 14 of the buckle is a characteristic structure of the mould.

[0055] Such as Figure 5 As shown, the specific process of using the vacuum-assisted resin transfer molding process to produce parts with buckles is as follows:

[0056] 1) Paste the sealant around the cavity of the lower mold, and do not tear off the white paper on the sealant at this time.

[0057] 2) Lay 6mm chopped carbon fiber in the cavity corresponding to the buckle position of the mold, so that the chopped carbon fiber fills the buckle cavity, and then lay 5 pieces of cut T300 woven carbon fiber cloth (10cm×6cm) layer by layer placed in the mold cavity.

[0058] 3) Cut the vacuum bag into a rectangle of 14cm×10cm, cut out a 5mm injection port and a 3mm exhaust port on the vacuum bag with scissors, tear off the white paper on the surface ...

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Abstract

The invention discloses an LCM (Liquid Crystal Module) integral forming method of a workpiece with a complex structure and the workpiece, the LCM integral forming method comprises the following steps: preparing a die corresponding to the complete structure of the workpiece to be manufactured, the die comprising a feature structure and a main body structure; laying continuous or discontinuous fibers in the features of the mold; continuous fibers or fiber felt cloth is laid in the main body structure of the mold layer by layer; attaching a vacuum bag or closing a mold to form a closed cavity, and compacting the fibers under the action of external force; opening a glue injection port, and injecting a mixture containing a resin monomer into the mold cavity to infiltrate the fibers until the characteristic structure and the main body structure of the mold cavity are filled; and heating to cure the mixture, and after the workpiece and the mold are cooled to room temperature, opening the mold and taking the workpiece out of the mold. According to the method, the workpiece can be integrally formed, the production process is greatly simplified, and meanwhile the size precision, the shape precision and the position precision of structures such as buckles on the workpiece are guaranteed through integral forming.

Description

technical field [0001] The invention belongs to the technical field of LCM, and more specifically relates to a method for integrally forming an LCM with a complex structural part and a part. Background technique [0002] Liquid Composite Molding (LCM) is to put the fiber prefabricated body into the mold first, inject liquid polymer after closing the mold or heat the resin film pre-placed in the mold cavity to melt it, and the liquid polymer impregnates the fiber during the flow process and Composite material preparation technology that fills the mold cavity and forms it into a product after curing. According to the mold structure and resin injection system, LCM can be divided into resin transfer molding (RTM), compression RTM (CRTM), lightweight RMT (RTM-Light) and vacuum assisted RTM (VARTM). LCM has the advantages of environmental friendliness, low process cost and high surface quality of parts. It has become the most successful composite material forming process after th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/36B29C70/54B29C70/10B29C70/16B29C33/00
CPCB29C70/36B29C70/54B29C70/10B29C70/16B29C33/00Y02T50/40
Inventor 周何乐子周华民李先阳黄志高彭雄奇丁浚纯张云
Owner HUAZHONG UNIV OF SCI & TECH
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