Pultrusion die for producing hybrid fiber reinforced polymer rod and preparation process
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A hybrid fiber and pultrusion die technology, which is applied in the field of composite material processing, can solve the problem that low-strain fibers cannot be uniformly dispersed according to a preset method, and achieve the effects of avoiding uneven heating, reasonable design and convenient operation.
Pending Publication Date: 2021-03-09
ZHENGZHOU UNIV
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[0007] Aiming at the problems existing in the prior art, the present invention proposes a pultrusion die and preparation process for producing hybrid fiber-reinforced polymer rods, which can solve the problem that low-strain fibers cannot be uniformly dispersed in HFRP rods according to a preset method when producing HFRP rods. Problems on rod cross section
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Embodiment 1
[0053] The pultrusion die used to produce hybrid fiber reinforced polymer rods in this example is not only suitable for preparing hybrid fiber reinforced polymer rods (including HFRP tendons, HFRP anchor rods and HFRP strands), but also suitable for preparing single fiber reinforced polymer rods. Polymer strands and cables, the reinforcement phase material for preparing hybrid fiber reinforced polymer rods can be composed of two or more reinforcement phases such as carbon fiber, glass fiber, aramid fiber, long synthetic fiber and steel strand, and the preparation of a single The reinforcing phase material of a fiber reinforced polymer strand and cable can be carbon fiber, glass fiber, aramid fiber, long synthetic fiber and steel strand, etc.; the matrix phase material for preparing a hybrid fiber reinforced polymer rod can be epoxy resin, Vinyl resin and unsaturated polyester resin, etc.
[0054] Such as figure 1 with figure 2 As shown, the pultrusion die includes a yarn cl...
Embodiment 2
[0064] Corresponding to the above pultrusion die used to produce hybrid fiber reinforced polymer rods, this embodiment provides a preparation process for hybrid fiber reinforced polymer rods, including the following steps:
[0065] Step S21, determine the parameters of the target hybrid fiber reinforced polymer rod: HFRP rod diameter D, total fiber volume ratio V f , hybrid fiber volume ratio V L :V H (V L stands for low elongation fiber volume, V H represents the high elongation fiber volume), the cross-sectional area of a single bundle of low strain fibers is S L , the cross-sectional area of the highly strained single-bundle fiber is S H , fiber distribution and other corresponding equipment control parameters.
[0066] The following calculations are required to prepare the target HFRP rod above:
[0067] Total number of bundles required for low strain fibers:
[0068] Total number of bundles required for high strain fibers:
[0069]According to the distribu...
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Abstract
The invention belongs to the technical field of composite material processing, and particularly relates to a pultrusion die for producing a hybrid fiber reinforced polymer rod and a preparation process. The pultrusion die comprises a yarn roll containing frame, a glue dipping device, a pre-forming device, a preheating device, a secondary forming device, a winding device, a high-temperature curingforming device, a cooling device, a traction device and a cutting device which are connected in sequence; the pre-forming device is used for extruding fiber bundles which are impregnated with the resin and are distributed in an array to form an array of hybrid fiber secondary rods; the preheating device is used for heating the hybrid fiber secondary rods output by the pre-forming device, an inletof the preheating device is connected with the pre-forming device through a glue scraping device, and an outlet of the preheating device is connected with the secondary forming device through the gluescraping device; and the secondary forming device is used for extruding the plurality of preheated hybrid fiber secondary rods to form a main rod. According to the pultrusion die, the problem that low-strain fibers cannot be uniformly dispersed on the cross section of the HFRP rod according to a preset mode when the HFRP rod is produced can be solved.
Description
technical field [0001] The invention belongs to the technical field of composite material processing, and in particular relates to a pultrusion die and a preparation process for producing hybrid fiber reinforced polymer rods. Background technique [0002] Steel bars, anchor rods and steel strands are widely used in engineering fields. For example, steel bars are used as reinforcing materials in combination with concrete, which greatly improves the overall performance of reinforced concrete. However, the corrosion of steel bars greatly affects the impact of reinforced concrete. The mechanical properties of mechanical components or the durability of structures are often the structures or components that are still in service and exit the normal service limit state ahead of time. For example, the corrosion of steel bars, anchor rods and steel strands are not uncommon in engineering practice. [0003] As a new type of composite material, fiber reinforced polymer (FRP) material ha...
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