4 results about "Internal layer" patented technology

This invention discloses a two-color injection molding process for Tritan material, belonging to the field of injection molding technology, which solves the problem of easy delamination and fusion lines in two-layer injection molding of the same Tritan material. The injection mold used in this process includes a male mold, a first injection mold, and a second injection mold. The workpiece includes a transparent inner layer and a transparent outer layer. The steps include: S1. Injecting molten Tritan raw material into the first injection mold heated to 100-130°C to form a transparent inner layer; S2. Cooling the first injection mold to 35-50°C, after mold opening, the transparent inner layer remains in the male mold and rotates 180 degrees to close with the second injection mold, so that the residual temperature of the transparent inner layer is maintained at 35-50°C; S3. Injecting molten Tritan raw material into the second injection mold heated to 100-130°C to form a transparent outer layer on the outer wall of the transparent inner layer; S4. Cooling and solidification; S5. Demolding. This invention achieves molecular chain diffusion and entanglement at the interface of inner and outer layer materials by precisely controlling the temperature of two injection molding processes, resulting in a product with strong interlayer bonding, high transparency, and rich visual effects in a single molding process.

The application relates to the technical field of composite material manufacturing, and discloses a stiffened wallboard forming device and a forming method. The stiffened wallboard forming device comprises a release cloth, a forming assembly and an encapsulating assembly. The release cloth is wrapped on a wallboard pre-forming body. First and second core molds of the forming assembly are respectively arranged on two sides of a rib in the wallboard pre-forming body and are pressed against the release cloth. One end of a gas permeable hole of the first core mold is open and communicates with an R area of the wallboard pre-forming body, which is beneficial to the discharge of gas in the R area, improves the gas permeability of the stiffened wallboard forming process, and the encapsulating assembly is arranged on the periphery of the forming assembly and encapsulates the wallboard pre-forming body. An inner layer of the encapsulating assembly is provided with a first semi-permeable membrane which is located at the other end opening position of the gas permeable hole. The use of the gas permeable hole and the first semi-permeable membrane guarantees the continuous gas permeability of the rib R area in the forming process, improves the forming quality and the qualified rate of the stiffened wallboard R area, and can continuously pump air and prevent resin overflow during the glue injection process, thereby reducing the waste of resin.

The present application belongs to the technical field of poultry hatching prevention and control, and particularly relates to a chicken embryo hatching period whole cycle prevention and control method based on phage layered delivery, comprising: screening phage strains suitable for different embryo age stages; preparing a composite carrier matrix with a porous structure by using chitosan and sodium alginate; preparing a layered delivery film by using a laminating film forming process to load different phage strains in the composite carrier matrix; attaching and covering the layered delivery film on the surface of the to-be-hatched egg, and placing the coated egg in a hatching device for hatching; combining the characteristics of the outer layer of the layered delivery film degrading first and the inner layer degrading later, and cooperating with a step-by-step solidification process to ensure the interlayer pores being connected, so that the layered delivery film wrapped around the egg degrades in sequence, and each embryo age chicken embryo can obtain the suitable phage at the corresponding infection risk stage, the hatching whole process is matched with the infection prevention and control stage, and a whole cycle prevention and control system covering early prevention, middle treatment and late targeted elimination is constructed.