3results about How to "Short molding cycle" patented technology

The utility model relates to the technical field of antenna protection equipment discloses a kind of lightweight recyclable thermoplastic radome, including the cover body made of thermoplastic composite material, hollow interlayer structure is arranged in the wall of the cover body;Thermoplastic composite material is with thermoplastic resin as matrix, and with fibre fabric as reinforcing material.A kind of lightweight recyclable thermoplastic radome, all adopt thermoplastic material, product life cycle end can be recycled by heating melting and realize the recycling of material, solve the environmental pollution problem of thermosetting composite material.

This invention relates to the field of centrifugal molding technology, and more particularly to an energy-saving, high-efficiency centrifugal molding device for cement poles. The device includes a base, on which an annular steel mold is mounted. The annular steel mold comprises an upper steel mold and a lower steel mold, on which multiple first arc-shaped strips and multiple second arc-shaped strips are respectively installed; a first cover plate and a second cover plate, respectively disposed on both sides of the annular steel mold; a central sleeve fixedly connected to the first cover plate; and a rotating assembly disposed on the first cover plate. The central sleeve of this invention incorporates an air-bag compression vibration mechanism. Through a rotating shaft, the compression ball periodically compresses the air bag, generating high-frequency micro-vibrations that allow the concrete slurry to flow fully, effectively expelling internal air bubbles and pores. This significantly improves the density, impermeability, and frost resistance of the pole, extending its service life and benefiting the production of cement poles.

The application discloses a kind of high light transmittance high toughness polyvinyl alcohol hydrogel and preparation method thereof, belong to high polymer new material technical field.The hydrogel uses the trimer formed by 2-hydroxyphenyl boronic acid in the mixed solution of water and organic solvent as crosslinking agent, and polyvinyl alcohol is formed into homogeneous solution under heating stirring, and pre-gel is obtained by centrifugal defoaming, standing, and finally solvent replacement is obtained high light transmittance high toughness polyvinyl alcohol hydrogel, structure is as shown in formula (I), wherein, m is the integer of 1~100, n is the integer of 5~2000.The method is simple and easy to operate, and the condition is mild, without high temperature and high pressure or repeated freeze-thaw, and the forming cycle is short.The obtained hydrogel has excellent light transmittance and high toughness, and can be widely applied in optical devices and industrial bearing fields.The achievement provides a new strategy for preparing high-performance polyvinyl alcohol hydrogel.