31results about How to "Thick and smooth" patented technology

The invention provides a method for preparing a hollow object by blow molding of zirconia ceramic. The method comprises: a step 1 of mixing raw materials to prepare slurry; a step 2 of preparing a blank tube, which is to inject the prepared slurry into a corresponding blank tube mold with an injection molding machine, take the blank tube out after the blank tube is solidified and obtain the blank tube; a step 3 of preparing a blank, which is to place the blank tube into a blow molding mold, and form the blank of a circular transition integrated hollow object by blowing under air pressure; a step 4 of degreasing the blank and removing plastic; a step 5 of pre-sintering at a low temperature kept between 1,000 and 1,200 DEG C; a step 6 of detecting and trimming the blank; a step 7 of sintering at a high temperature kept between1,450 and 1,550 DEG C; and a step 8 of cooling to obtain the integrated hollow object. The method has a simple and reliable preparation process, reduces production cost, has high yield and is favorable for industrial mass production, and the prepared hollow object has high size precision and a long service life.

The invention discloses a weft-knitted fabric with a multilayer structure and a weaving method thereof. The multilayer structure at least includes a ground layer, a spacer layer and a surface layer, that is, a four-layer structure of surface layer-ground layer-spacer layer-surface layer; The method is as follows: adjust the angle of the dial triangle and the needle cylinder triangle on the double-sided knitting circular knitting machine, change the trajectory of the triangle, so that the knitting needles do not move to the degree of stripping; the knitting fabric stratum is woven into circles on the knitting needles with small loops , tuck or float, weave on either side or both sides of the fabric; the spacer layer of the woven fabric is connected to the ground layer by tuck or loop, and is not directly hung on the surface layer coil to avoid damage to the fabric surface. influences. The surface layer of the woven fabric is woven by knitting all the knitting needles into loops or by selecting needles to form loops, tucks, and floating threads. The stitches that form the same course can give the fabric surface a textured effect.