PMI (polymethacrylimide) foam elbow core material and forming method thereof

A molding method and technology of foam core materials, applied in the field of foam core material molding, can solve the problems of complex procedures and inability to quickly process bent pipe PMI foam core materials, etc., and achieve the goals of saving a lot of materials, beautiful appearance, and reducing raw material costs Effect

Active Publication Date: 2018-06-29
CHENGDU AERONAUTIC POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of PMI foam elbow core material and its molding method, to solve the problem that the existing molding technology process is complicated, and the problem that the elbow type PMI foam core material cannot be processed simply and quickly, especially when there is no milling machine Under conditions

Method used

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  • PMI (polymethacrylimide) foam elbow core material and forming method thereof
  • PMI (polymethacrylimide) foam elbow core material and forming method thereof
  • PMI (polymethacrylimide) foam elbow core material and forming method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The PMI foam elbow core material molding method of the present embodiment comprises:

[0026] (1) Take the PMI foam core material processed into a straight tube, draw a line along the circumferential direction of the straight tube at the part that needs to be bent, draw multiple parallel lines at intervals of 2-5mm on both sides of the straight tube, and The parallel lines of the straight pipe are distributed in a staggered manner, and then cut along the parallel lines on both sides of the straight pipe to form a gap, and each side is not cut off when cutting.

[0027] Such as figure 1 As shown, lines are drawn along the circumferential direction on both sides of the straight tube PMI foam core material, the lines on both sides are distributed alternately, and the interval between two adjacent cutting lines on the same side is 2-5mm. Those skilled in the art can determine according to the size of the bending arc, for example, 2 mm is suitable for the case of a small be...

Embodiment 2

[0034] The difference between the present embodiment 1 and embodiment 1 is that step (3) is different, specifically as follows:

[0035] (3) epoxy resin and curing agent are mixed according to the weight ratio of 2.5:1, and mixed glue is obtained, and described mixed glue is mixed with thickener according to the weight ratio of 6.5:1, and mixed paste is obtained, The mixed paste was filled into the bent gap, and then heated and cured at 130° C. for 3 hours to obtain a PMI foam bent pipe core material.

Embodiment 3

[0037] The difference between the present embodiment 1 and embodiment 1 is that step (3) is different, specifically as follows:

[0038] (3) Mix the epoxy resin and the curing agent according to the weight ratio of 3.5:1 to prepare the mixed glue, and mix the mixed glue with the hollow glass microspheres according to the weight ratio of 7.5:1 to make the mixed paste , the mixed paste was filled into the bent gap, and then heated and cured at 140° C. for 2 hours to obtain a PMI foam bent pipe core material.

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Abstract

The invention discloses a PMI (polymethacrylimide) foam elbow core material and a forming method thereof and belongs to the technical field of foam core material forming. The forming method of the PMIfoam elbow core material comprises the steps as follows: gaps are formed in two sides of a straight pipe PMI foam core material through cutting, then, the core material is bent to be at the requiredangle by use of the gaps, the gaps are filled with mixed paste consisting of epoxy resin, a curing agent and hollow glass beads, and the PMI foam elbow core material is prepared after curing. The machining process is simple, the operability is high, the PMI foam elbow core material can be molded without special machining equipment (milling machine), a large quantity of manpower and material resources are saved, and the machining cost of the core material is reduced.

Description

technical field [0001] The invention relates to the technical field of foam core material forming, in particular to a PMI foam bend pipe core material and a forming method thereof. Background technique [0002] Polymethacrylimide (PMI) foam is a commonly used core material in composite products, and it often needs to be processed into various shapes. Straight block foam is easy to process and shape, while curved pipe shapes are difficult to grind and process, often requiring a lot of manpower and material resources. Contents of the invention [0003] The purpose of the present invention is to provide a kind of PMI foam elbow core material and its molding method, to solve the problem that the existing molding technology process is complicated, and the problem that the elbow type PMI foam core material cannot be processed simply and quickly, especially when there is no milling machine Under conditions. [0004] The technical scheme that the present invention solves the pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L33/24C08K7/28
CPCC08L33/24C08L63/00C08L2203/18C08L2205/20C08K7/28
Inventor 黄频波王彦茹周雪梅叶莉萍黄晨璐
Owner CHENGDU AERONAUTIC POLYTECHNIC
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