2results about How to "Change flow velocity" patented technology

The application discloses an injection molding method for a toy light guide pipe, which can avoid the occurrence of flow lines and bubbles in the toy light guide pipe after injection molding. The technical scheme is as follows: an injection molding method for a toy light guide pipe, which comprises a mold provided with a cavity, and the cavity is provided with a gate through which glue is injected into the cavity, and the glue injection is divided into five stages, i.e., a first glue injection stage, a second glue injection stage, a third glue injection stage, a fourth glue injection stage and a fifth glue injection stage. The glue injection speed of the first glue injection stage is the largest, the glue injection speed of the third glue injection stage is larger than that of the second glue injection stage and the fourth glue injection stage, and the glue injection speed of the fifth glue injection stage is the smallest. The glue injection pressure of the first glue injection stage is smaller than that of the second glue injection stage, and the glue injection pressure of the second glue injection stage is smaller than that of the third glue injection stage. The application belongs to the technical field of injection molding.

This invention discloses a continuous flow microreactor flow rate control system and preparation method for the preparation of nano-β-MnO2, comprising a base, a first injection tube, a second injection tube, a microfluidic mechanism, and a collection mechanism. The first and second injection tubes are both fixedly mounted on the base, each containing a first reaction solution and a second reaction solution, respectively. The microfluidic mechanism is fixedly mounted on the base and communicates with the first and second injection tubes. A collection mechanism is also fixedly mounted on the base and communicates with the output end of the microfluidic mechanism. A temperature control mechanism for adjusting the temperature of the microfluidic mechanism is also provided on the base.