50results about How to "Precise process control" patented technology

The invention relates to a bag compression resin transfer molding (RTM) mold, device and method. The bag compression RTM mold comprises an outer mold and further comprises an upper mold, a lower mold,an air bag and a guiding piece which are located in the outer mold; the upper mold is of a convex block structure, and the lower mold is of a groove structure, wherein the convex block structure andthe groove structure are mutually matched; the lower mold is located blow the upper mold, the air bag is located below the lower mold, the guiding piece is used for limiting the movement direction ofthe lower mold to the up-down direction, communicating resin inlets are formed in the upper mold and the outer mold, a vacuum pump connector and an air inlet which is connected with an air bag inlet are formed in the outer mold, and a resin outlet is formed in the lower mold. The device is composed of the molding mold, an air storage tank, a vacuum pump, a pressure tank and a heating deice. The method comprises the steps: a reinforced material is placed into the mold to be heated firstly, then a closed space between the upper mold and the lower mold is vacuumized and then fully filled with resin, then when heating is conducted to a resin gel point, the air bag is inflated to compress the lower mold, and finally curing and demolding are conducted. The molding mold and device are simple in structure, and the production efficiency of the method is high.

The invention discloses a graphite composite negative electrode material for a lithium ion battery, a preparation method of the material, and the lithium ion battery. The graphite composite negative electrode material for the lithium ion battery has a core-shell structure, wherein graphite is used as an inner core; carbon nano tubes and / or carbon nanofibers which are uniformly distributed on the surface of the graphite and are in in-situ growth are used as the shell; the growth root points of the carbon nano tubes and / or the carbon nanofibers are in tight contact with the surface of the graphite; and the other ends of the carbon nano tubes and / or the carbon nanofibers are distributed on the surface of the graphite randomly. The preparation method comprises the following steps of: fully soaking the graphite as a raw material by a catalyst-containing solution, and drying to obtain a graphite composite material precursor; performing chemical vapor deposition to generate the carbon nano tubes and / or the carbon nanofibers; and finally performing the purification and annealing treatment. The graphite composite negative electrode material has high height ratio, conductivity, and rate capability, and excellent solution absorption performance and cycle performance; and the method is simple in production flow, accurate in process control, low in cost, free from severe conditions, and easy to realize the industrialization.

The device for improving the detection accuracy of oxide layer thickness in the present invention includes a furnace tube, a crystal boat, several wafers and three control sheets placed on the top, middle and bottom of the crystal boat, and the wafers and control sheets are arranged and placed on the crystal boat. A blocking sheet is also placed above the control sheets located in the middle and bottom of the crystal boat. In addition, the present invention also provides a method for improving the detection accuracy of the thickness of the oxide layer, which includes loading several wafers and three control plates into the wafer boat, and placing a blocking plate respectively above the control plates at the middle and bottom of the wafer boat, and then Lift the crystal boat into the furnace tube for oxidation. In the present invention, the baffle arranged above the control plate can effectively prevent the thin film on the lower surface of the wafer from affecting the growth of the oxide layer of the control plate during the oxidation process, so that the thickness of the oxide layer on the three control plates is more stable, and can truly and accurately reflect the thickness of the entire furnace. The condition of the tube, which is conducive to more precise process control of the oxidation of the entire furnace tube.

The invention discloses a cold disinfection method for the central control system of a dairy product production line, which is used for cold disinfection treatment of milk collection pipelines, milk tank cars, raw material storage tanks and homogenizing machines, comprising the following steps: (1) opening the CIP central control system Carry out original cleaning of the production line, (2) empty the acid solution in the pickling tank in the CIP central control system, and input cold disinfectant; (3) adjust the pickling temperature to normal temperature through the CIP central control system, set the acid The washing process takes 8 to 15 minutes; the CIP central control system is turned on for a separate pickling process. (4) After the pickling in step 3, rinse with water for 3 to 5 minutes; (5) Drain the cold disinfectant in the pickling tank, rinse it, and then transport the acid solution discharged in step 2 back to the pickling tank . The cold disinfection method of the central control system of the present invention realizes automatic cold disinfection, greatly reduces the waiting time and disinfection time of the disinfection process, and improves the efficiency of CIP disinfection in the production process.