5results about How to "Meet flatness requirements" patented technology

The application relates to a flattening device for carton production, which comprises a frame body, a conveyor for conveying carton boards arranged on the frame body, a plurality of guide rollers arranged along the length of the conveyor in sequence, a flattening mechanism arranged on the frame body and used for flattening the carton boards, characterized in that a heat source roller is arranged above the conveyor and used for hot pressing the carton boards, and a driving member is arranged on the frame body and used for driving the heat source roller to rotate. The flattening device can be used in cooperation with the heat source roller, the driving member and the flattening mechanism, the carton boards can be hot-pressed before being flattened, the carton boards are subjected to the joint action of heat and pressure, the flexibility of the carton boards is reduced, the resilience of the carton boards is weakened, the required pressure and time for subsequent flattening are reduced, the carton boards can reach the flatness requirement through one or a small number of flattening operations, and the production efficiency is improved.

This utility model relates to a high-precision stainless steel stretching forming mold, belonging to the field of stretching mold technology. The initial stretching mold realizes the blanking and stretching, and then the cleaning component cleans the initial part. After cleaning, the heat treatment component performs heat treatment to reduce the hardness of the initial part and eliminate internal stress. Then, the initial part is stretched and thinned a second time through the secondary stretching mold to form the intermediate part. Then, the 45-degree flanging mold and the 90-degree flanging mold are used to shape the angle of the intermediate part. Finally, the edge trimming mold removes the excess edges and corners of the intermediate part to form the finished part. This production process can reduce the cold work hardening of stainless steel and prevent surface scratches and cracks. After stretching and forming, the product can meet the requirements for surface roughness and flatness of the parts.

This invention relates to a cleaning solution and cleaning method for removing the SiO2 film layer on the surface of silicon carbide. The cleaning solution comprises the following components by volume: 15-20% HF, 5-10% HNO3, 8-12% NH4F, 0.01-0.05% nonionic surfactant, and the remainder is ultrapure water. The mass concentration of HF is 49%, the mass concentration of HNO3 is 68%, and the mass concentration of NH4F is 30%. The cleaning method includes the following steps: (1) pre-cleaning the silicon carbide with ultrapure water; (2) performing main cleaning on the pre-cleaned silicon carbide using the above cleaning solution; (3) placing the main-cleaned silicon carbide into a 15-20% NH4OH / H2O2 mixed solution for neutralization and cleaning, then cleaning with an ultrapure water solution containing disodium ethylenediaminetetraacetate, and finally cleaning with a four-stage countercurrent ultrapure water rinsing system; (4) performing post-treatment cleaning in ultrapure water with an ozone content of 4-6 ppb, then rinsing with ultrapure water, and finally drying with isopropanol vapor. This method ensures that the silicon carbide surface is free of residue, has low particulate contamination, and is of high purity after cleaning, meeting the stringent requirements of semiconductor etching processes for the cleanliness and integrity of the material surface.

This invention relates to the field of subframes and discloses a novel hollow cast aluminum rear subframe. The subframe is integrally cast and includes a frame portion and a reinforcing beam portion. The frame portion is a hollow quadrilateral tubular structure, including a front crossbeam, a rear crossbeam, a left longitudinal beam, and a right longitudinal beam. The reinforcing beam includes a solid beam in the middle and connecting portions integrally formed with the longitudinal beams at both ends. A through first mounting hole is provided in the middle of the connecting portion, and a first fixing hole is provided on the side wall of the first mounting hole. Mounting structures are provided at the four corners on the upper side of the frame portion, and lower mounting structures are provided at the four corners on the lower side of the frame portion. Both the upper and lower mounting structures are integrally cast with the subframe. This subframe has the advantages of light weight, high strength, fewer parts, and high flatness.

The utility model belongs to the technical field of foam tape processing, specifically discloses a kind of foam tape processing pressure device, including base, and fixed mounting is equipped with extrusion table on the base, and forming cavity is opened in the extrusion table, and the sliding joint is equipped with detent baffle in the extrusion table, and the upper surface of base is fixedly connected with slide, the inside slide of slide is connected with rack, and the one end of rack near extrusion table is provided with flexible pressure mechanism for carrying out pressure to foam tape, and driving mechanism for moving rack is provided on the base.This foam tape processing pressure device, in the process of foam tape pressure, the progressive compression of spring in flexible pressure mechanism makes the pressure that pressure head exerts to foam from zero start slowly increase, avoid the instantaneous collapse of pore structure caused by pressure mutation in traditional rigid extrusion, and this kind of flexible contact significantly reduces the irreversible deformation of foam fiber, protects its three-dimensional porous network structure.