Compression molding method of antenna housing and pre-compaction mold

A technology for molding and forming molds, which is used in household appliances, other household appliances, household components, etc., can solve the problems of cracking, mechanical strength drop, protrusions and other problems at the clamping seam, so as to achieve a tight fit and improve interlayer adhesion. combined effect

Active Publication Date: 2020-12-04
SICHUAN JIUZHOU ELECTRIC GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the preparation process of compression molding, after the preform with prepreg as raw material is laid up, when the female mold and the male mold are closed, the local preform (especially when the prepreg is too thick) The part) is larger than the mold cavity, which can easily cause local fiber extrusion and protrusions during mold closing, resulting in fiber breakage, or voids, and lack of material
In the subsequent use, there will be cracks at the mold joint, resulting in a decrease in mechanical strength and a potential safety hazard

Method used

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  • Compression molding method of antenna housing and pre-compaction mold
  • Compression molding method of antenna housing and pre-compaction mold
  • Compression molding method of antenna housing and pre-compaction mold

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Embodiment 1

[0038] An embodiment of the present invention, such as Figure 1 to Figure 2 As shown, a compression molding method of a radome is disclosed. Specific steps include:

[0039] Step 1: Analyze the structure of the part and determine the parts that are prone to problems when the part is molded:

[0040] The part that is prone to problems during compression molding is the part with a large local thickness of the part. When laying up prepregs, lay them up as a whole first. After several layers, stop laying up parts with smaller thickness, and continue laying up parts with larger thickness. Because the thickness of each layer of prepreg is the same, the part with a larger local thickness will have more prepreg layers than other parts when the prepreg is laid, and the number of layers will make the volume of the part larger. After the stacking is completed, the size of this part is larger than the cavity size of the forming mold, causing the fibers in the thicker part to be squeez...

Embodiment 2

[0054] Such as image 3 , Figure 4 As shown, the embodiment of the present invention provides the pre-compacting molds in Embodiment 1, and each set of pre-compacting molds includes two counter-molds on the left and right. In this embodiment, the radome has a left-right symmetrical structure, so the left-right mold structure is symmetrical. According to the shape of the radome, the pre-compaction mold can be designed, and it can also be designed as a top-down mold or an asymmetric mold.

[0055] This embodiment includes two groups of pre-compacting molds. According to the shape of the radome, the pre-compacting mold is a cuboid with a groove. The shape of the groove corresponds to the shape of the radome. The pre-compacting mold is the female mold of the forming mold. a part of. The pre-compaction mold can also be designed into other shapes, and the overall should meet the requirements of regularity, simplicity, and convenient design and processing. The height of the pre-...

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Abstract

The invention relates to a compression molding method of an antenna housing and a pre-compaction mold, and belongs to the technical field of composite material compression molding. The problems that in the existing compression molding process, when a female mold and a male mold are assembled, fiber extrusion, protrusions or cavities and material shortage are generated at the mold assembling position, so that fiber breakage is caused, and the mechanical strength of the mold assembling position is influenced are solved. The compression molding method of the antenna housing includes the followingsteps: 1, analyzing the structure of a workpiece, and determining a portion prone to go wrong during compression molding of the workpiece; 2, designing a plurality of thickness gradients according tothe thickness of the portion with larger thickness of the workpiece; 3, designing the pre-compaction mold; 4, conducting laying and pre-compaction; and 5, conducting mold assembling and curing molding. The pre-compaction mold is used for local compaction multiple times, the situations of fiber extrusion, protrusions or cavities and material shortage at the mold assembling position are avoided, then fiber breakage is avoided, and the mechanical strength of the mold assembling position is guaranteed.

Description

technical field [0001] The invention relates to the technical field of compression molding of composite materials, in particular to a compression molding method of a radome and a pre-compacting mold. Background technique [0002] Compression molding is a very widely used method of composite material molding, accounting for about 10% of the total distribution of composite material products. The method is to add a certain amount of prepreg or prepreg into a mold composed of a female mold and a male mold. , a method of curing a preform into a product under a certain temperature and pressure. The main advantages of the compression molding process are: one-time molding, high dimensional accuracy, good repeatability, smooth surface, no secondary processing or a small amount of secondary processing; high production efficiency, easy to achieve specialized and automated production, and can effectively reduce manufacturing costs. The cost is suitable for the preparation of small and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/54B29C33/00B29L31/34
CPCB29C70/345B29C70/54B29C33/00B29L2031/3456
Inventor 周蜜
Owner SICHUAN JIUZHOU ELECTRIC GROUP
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