Compression molding method of slender tubular composite part
A molding and tubular technology, which is applied in the field of compression molding of composite parts, achieves the effects of compact parts, short processing cycles, and simple and feasible methods.
Pending Publication Date: 2022-06-28
JINXI IND GRP
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Problems solved by technology
[0004] The purpose of the present invention is to solve the problem that the traditional molding method cannot reliably mold the elongated tubular composite parts with a relatively large length and diameter, and to provide a molding method for the elongated tubular composite parts
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Embodiment
[0018] Taking the processing of slender tubular composite parts as an example, the structure is as follows figure 1 As shown, the length of the elongated tubular composite part is 95mm and the diameter is 20mm. The specific processing steps are as follows:
[0019] 1) The tubular metal shell is processed, and a plastic part positioning hole is opened in the middle side wall of the metal shell;
[0020] 2) A group of cylindrical pre-presses of the same size are pressed in sections by the molding process, the pressing density of each pre-press is 75% of the density of the finished product, the length of each pre-press is 40mm, and the diameter of each pre-press is 40mm. is 19mm, and the number of pre-pressed parts is N=95÷1.5÷20; N takes the rounded positive integer as 3;
[0021] 3) Put the tubular metal shell vertically into the pressing mold, put all the pre-pressed parts into the tubular metal shell, and compress the pre-pressed parts in the inner cavity of the tubular meta...
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Abstract
The invention discloses a compression molding method for a slender tubular composite part. The method comprises the following steps: firstly, processing a tubular metal shell; then, a set of cylindrical pre-pressed pieces with the same size are pressed in a segmented mode through the mold pressing technology, and the pressing density of each pre-pressed piece is 75%-80% of the density of a finished product; then the tubular metal shell is vertically arranged in a pressing mold, all the pre-pressed pieces are arranged in the tubular metal shell, the pre-pressed pieces are compacted in an inner cavity of the tubular metal shell, and a solid semi-finished compression molding piece is obtained; and finally, an inner cavity of the semi-finished compression molding part is axially drilled, so that the thickness of the inner wall of the tubular metal shell meets the product design size, and the slender tubular composite part is obtained. By means of the compression molding method, compression molding of the slender tubular composite part with the large length-diameter ratio is achieved.
Description
technical field [0001] The invention relates to a molding method for slender tubular composite parts, belonging to the technical field of compression molding of composite parts. Background technique [0002] The molding of conventional thermosetting plastics is carried out by the method of mold preheating - charging - heating and curing - unloading. For some slender parts with relatively large length and diameter, it is difficult to achieve full filling of the mold at one time, and the pressed products are prone to looseness, Shortage of materials and other defects, the product yield is not high. [0003] A slender tubular composite part, such as figure 1 As shown, the outer layer of the part is a tubular metal shell, and the inner layer is a 4330-3J phenolic glass fiber molding compound pressed on the inner wall of the tubular metal shell. The length of the part is 95mm, the diameter is 20mm, and the aspect ratio is about 5. The traditional molding method cannot reliably ...
Claims
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IPC IPC(8): B29D23/00
CPCB29D23/001
Inventor 霍文娟刘印孙丙辰刘巍浩刘少林李龙飞张勇鲍美林
Owner JINXI IND GRP