Flat-knitting fully-formed helmet shell prefabricated part, preparation method and helmet shell made of flat-knitting fully-formed helmet shell prefabricated part
A prefabricated, fully formed technology, applied in weft knitting, household components, other household appliances, etc., can solve the problems of lack of solutions, poor dimensional stability, low production efficiency, etc., to save cutting and splicing, improve resistance Impact performance, the effect of improving production efficiency
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Embodiment 1
[0044] A method for preparing a flat-knitting full-shaped helmet shell preform, the method is to prepare two helmet shell preforms with different weaving directions by combining longitudinal weaving and transverse weaving respectively with local weaving; Add reinforcement yarn in the weaving process, obtain the helmet shell prefabricated part with reinforcement yarn of horizontal weaving and longitudinal weaving;
[0045] Described longitudinal weaving specifically comprises:
[0046] When weaving on a flat knitting machine, the weaving width is the arc length between the left ear part and the right ear part of the helmet shell, and the weaving width is related to the thickness of the yarn and the transverse density of the fabric; the weaving direction follows the helmet shell from the forehead to the back of the head part or from the back of the head to the direction of the forehead;
[0047] Described horizontal weaving specifically includes:
[0048] When weaving on a fla...
Embodiment 2
[0069] A method for preparing a helmet shell, comprising the steps of:
[0070] laying the helmet shell prefabricated parts of horizontal weaving and longitudinal weaving with reinforcing yarn in the helmet mold in a mutually perpendicular manner; then injecting the resin solution into the helmet mold, curing and stripping to obtain the helmet shell;
[0071] details as follows:
[0072] (1) In the helmet mould, the release agent is evenly wiped first, and then a helmet shell preform in a longitudinal weaving direction obtained in Example 1 and a helmet shell preform in a transverse weaving direction are laid in a direction perpendicular to each other. placed in the helmet mold;
[0073] (2) Under room temperature conditions of 26°C, the epoxy resin and the curing agent were uniformly mixed in a mass ratio of 2:1 to obtain a resin solution; the resin system was purchased from Changzhou Hualike New Material Co., Ltd. The resin model is epoxy resin A02, and the curing agent is...
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