5results about How to "Fix production issues" patented technology

The utility model discloses a manual bread cutting machine, which relates to the technical field of manual bread making equipment and comprises a mounting base and a mounting handle rotatably connected in the mounting base, and the mounting handle is rotatably connected with two mutually symmetrical transmission plates; according to the bread cutting device, the multiple cutting knife frames are distributed in the length direction of the mounting frame in a linear array mode, bread can be cut into multiple parts through one-time operation, and compared with a traditional mode that the bread is broken through fingers or a common bread cutting tool is used, the cutting efficiency is improved, the batch cutting requirement is met, and manpower and time cost is reduced. And on the other hand, the cutting knife frames distributed in an array mode guarantee the consistency of the cutting effect, the cut bread is uniform in shape and size, and follow-up dish making and presenting are facilitated. The design solves the problem that a common bread cutting tool is difficult to ensure the consistency and stability of the cutting effect, and avoids the influence on the dish quality due to different shapes and sizes of bread.

This invention provides a core box mold for casting large motor bases, belonging to the field of casting mold technology. The core box mold is manufactured based on the five-part structure of a large motor base sand core. The core box mold includes an inner cavity air hole sand core 1# core box for manufacturing inner cavity air hole sand core 1#, an outer cavity sand core 2# core box for manufacturing outer cavity sand core 2#, an outer cavity sand core 3# core box for manufacturing outer cavity sand core 3#, an outer cavity sand core 4# core box for manufacturing outer cavity sand core 4#, and an outer cavity sand core 5# core box for manufacturing outer cavity sand core 5#. These five core boxes are independent of each other. This invention provides a corresponding core box mold comprising five parts for the new integrated sand core structure of large motor bases, solving the manufacturing problem of the new integrated sand core and creating conditions for achieving boxless casting of the base.

The application provides a preparation method of ROS-responsive hyperbranched polymer hydrogel and the hydrogel, and belongs to the technical field of hydrogel. Firstly, Michael addition reaction occurs between double bonds on PEGDA and amine groups of chain-like aliphatic diamine with ROS scavenging groups in the structure, and a hyperbranched polymer PBAE is obtained as a crosslinking agent; then esterification reaction occurs between methyl methacrylate and HA to obtain HAMA; finally, HAMA, AM and PBAE solution are mixed, and AHP hydrogel is formed through a one-step free radical polymerization reaction. The preparation method of the AHP hydrogel is simple, the material source is wide, the production efficiency is high, the AHP hydrogel has good mechanical properties, oxidation resistance and biocompatibility, and is easy to produce and prepare on a large scale.

This invention discloses a method for preparing a seven-hole multilayer propellant by end-face spraying, applicable to the end-face sealing of multilayer propellants. The invention employs a honeycomb mold to constrain the propellant columns, enabling the orderly arrangement of the seven-hole multilayer propellant. The larger diameter of the inner holes in the honeycomb mold facilitates filling. A solvent-based swelling and sealing technique ensures a tight fit between the outer wall of the seven-hole multilayer propellant and the inner wall of the honeycomb mold, protecting the outer wall. Using a spraying liquid made of the same material as the outer layer of the seven-hole multilayer propellant forms a protective layer with the same composition as the outer layer on the end face, significantly improving the combustion pyrolysis properties of the propellant. This invention solves the problem of only being able to prepare seven-hole multilayer propellants by end-face spraying, providing a technical means for preparing seven-hole multilayer propellants by end-face spraying.

This utility model discloses a two-piece straight-through stop valve, relating to the field of stop valve technology. It includes a main valve body, a secondary valve body, a valve stem, a valve cover, and a valve disc. The main valve body and the secondary valve body are locked together by threaded fittings to form the valve body. The valve cover is sealed to the top of the valve body. The bottom of the valve stem penetrates the valve cover and extends into the inner cavity of the valve body. The bottom of the valve stem is coaxially inserted into the valve disc. A cap is used to seal the valve stem and valve disc together. The valve body's structure, consisting of a main valve body and a secondary valve body locked together by threaded fittings, simplifies the fabrication of the fluid flow channels for both the main and secondary valve bodies, thus solving the problem of manufacturing the flow channel for a straight-through stop valve.