Composite material rim and die thereof, as well as method for manufacturing composite material rim through die

Abstract

The invention provides a die of a composite material rim, a method for manufacturing the composite material rim through the die, and the composite material rim manufactured through the manufacture method. The composite material rim is provided with a bottom surface and two sides respectively arranged on two opposite sides of the bottom surface, the composite material rim is in a U shape approximately, and a frame lip extends out of one end of each side, which is far from the bottom surface, to the other side. The die comprises an outer die and a die core, wherein the component of the die core comprises water soluble resin; two concave grooves are formed in two opposite side surfaces of the die core; outlines of the two concave grooves correspond to the frame lips of the composite material rim; the composite material rim can be formed between a containing space encircled by the outer die and the die core; the die core can be dissolved and removed after the composite material rim is formed, so that a manufacture process can be simplified, and the composite material rim with a smooth and unfaulted surface can be provided.

Description

technical field [0001] The invention relates to the technical field of composite rims, in particular to a composite rim, a mold for manufacturing the composite rim and a manufacturing method for using the mold to manufacture the composite rim. Background technique [0002] A tire with a bead of a bicycle usually needs to be combined with a rim with a frame lip, and the bead and the frame lip are fastened to each other so that the tire and the rim are definitely combined. [0003] Generally speaking, the manufacture of composite material rims usually uses an outer mold and a mold core to cooperate with each other, and the composite materials are stacked on the inner surface of the outer mold, so that the composite materials are clamped by the outer mold and the mold core, and then processed through the molding process. Composite rims, and the rims with frame lips are bent and extended inwardly. If a simple single mold core is used to manufacture, the mold core will be hindere...

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned mold and rim manufacturing method has many disadvantages: first, the operation of the three-piece mold core is not easy, especially when the mold core is removed from the mold, it is quite troublesome and time-consuming; moreover, because the mold core is three-piece, There will inevitably be gaps and level differences between the main mold body and the two side mold bodies, which will easily lead to uneven level differences on the surface of the formed rim, which will not only affect the appearance, but may also affect the structural strength; in addition, because the core is formed by Combining three parts, the total size of the combination is of course affected by the tightness of the three parts. Even, compared with the one-piece mold core, the size of the three-piece mold core is affected by the three parts, which greatly increases the error. chance, and if the main mold body is tightly inserted between the two side mold bodies, it will be relatively difficult to demould, on the contrary, if the main mold body and the two side mold bodies are less closely , although it is easier to demould, it greatly affects the dimensional accuracy and the smoothness of the rim surface

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