3results about How to "Good material uniformity" patented technology

This invention belongs to the field of biodegradable plastics technology and relates to a method for improving the dispersibility of dry starch in the preparation of biodegradable plastic masterbatch. Edible oil is added to dry starch with a moisture content of less than 6%, and the mixture is stirred in a high-speed mixer. PLA or PBTA granules are then added and the mixture is stirred further in a high-speed mixer. Finally, the mixture is extruded and granulated to obtain a homogeneous biodegradable plastic masterbatch. The addition of edible oil as a dispersant allows for direct mixing with PLA or PBTA, simplifying the processing, overcoming starch agglomeration, and enabling the starch addition to reach 70%, thus reducing the amount of PLA or PBTA used and lowering material costs. There is no issue of plasticizer precipitation, and the tensile strength, tear strength, elongation, and impact toughness of the product are significantly improved.

The utility model relates to a spaceflight core circuit board batch screening test fixture, which relates to the technical field of spaceflight electronic equipment testing, and comprises an upper shell and a lower shell, and the upper shell covers the lower shell; eight sunken open grooves are formed in the bottom face of the interior of the upper shell and the bottom face of the interior of the lower shell, supporting and limiting protrusions are arranged at the positions, close to edge openings of the bottom faces, of the sunken open grooves, and three positioning holes are formed in the edge opening of each sunken open groove; one end of the inner bottom surface of the upper shell and one end of the inner bottom surface of the lower shell are each provided with a through vacuum pumping hole and a pin header wiring hole. DB25 connecting holes communicated with the pin header wiring holes are formed in the side faces of the upper shell and the lower shell, screw holes are formed in the two sides of each DB25 connecting hole, and dispensing holes are formed in the outer side edge openings of the pin header wiring holes. The test fixture has the advantages that the test efficiency is greatly improved, and the test fixture has great generalization performance.

The utility model discloses a high -efficient forming base mould of aromatherapy machine, including upper die holder and the lower die holder of setting in the lower die holder below, upper and lower die holder include base, and be provided with cooling mechanism on the lower die holder, and cooling mechanism includes refrigerant pool and sets up the waste liquid pool of refrigerant pool one side, refrigerant pool and waste liquid pool are all the cavity structure of opening and hollow inside top, and refrigerant pool and waste liquid pool are all fixed on the lower die holder, and the pump body is fixed on refrigerant pool, and the pump body is connected with conveying pipe, shunt, refrigerant input pipe and cold flow pipe in proper order, and the inboard of cold flow pipe is provided with heat conduction subassembly, and refrigerant input pipe, cold flow pipe and heat conduction subassembly all are provided with multiple sets, and multiple sets of cold flow pipe gradually move away injection moulding groove from top to bottom. The high -efficient forming base mould of aromatherapy machine, the cooling rate of different depth is basically same, and the uniformity of the material of the different height of the aromatherapy machine base after forming is better.