Composite material pultrusion die, equipment and method, profile and application

Abstract

The invention discloses a composite material pultrusion die, equipment and method, a profile and an application. The composite material pultrusion die includes a die body. The die body has a forming section, the forming section is a cavity with equal cross section, and the length of the forming section is less than or equal to 700 millimeters. The length of the forming section of the die body is less than or equal to 700 millimeters, the die body has a small contact surface with the profile, small resistance to the profile, and so the pultrusion pulling force is small and the internal stress in the profile is small during a forming process. Therefore, the profile has the advantages of good straightness, uniform wall thickness and good surface quality. Further, pultrusion of one die with multiple cavities can be easily realized.

Description

technical field [0001] The invention belongs to the technical field of composite material pultrusion molding, and in particular relates to composite material pultrusion dies, molding equipment and methods thereof, profiles and applications thereof. Background technique [0002] The pultrusion molding process is to heat and solidify continuous glass fiber yarns and fabrics soaked in glue under the action of traction and pultrusion through a mold with equal cross-section to continuously produce products of unlimited length. At present, the general length of composite pultrusion dies is between 800 mm and 1200 mm, and 1000 mm long pultrusion dies are widely used. [0003] Because the pultruded product must be heated and solidified in the mold, and then demoulded in the mold cavity and pulled out continuously. Therefore, the mold must have a certain length of heating forming section, and the straightness of the mold cavity surface is very high, otherwise the products with equal...

AI Technical Summary

Problems solved by technology

[0005] 1) There are many parting surfaces, resulting in large cumulative errors in processing and assembly;

[0006] 2) The contact surface between the mold cavity and the profile is large, the resistance to the profile is large, the internal stress in the profile is large during the molding process, and it is easy to cause deformation of the profile, such as bending, uniform wall thickness, poor surface quality, etc.;

[0007] 3) The straightness and flatness requirements of the mold are very high, the manufacturing cycle is long and the cost is high;

[0008] 4) There are many fastening screws in the mold, the assembly cycle is long, and it is easy to deform;

[0009] 5) The thickness of the mold is large, otherwise it is easy to deform, so the cost of the mold is high, and the heat transfer is not good

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