66 results about "Die preparation" patented technology

A method of manufacturing a stator of a motor comprises the steps of bending at least one end of an electrical steel sheet to prepare a core sheet comprising a yoke part and at least one pole part bent from the yoke part, stacking a plurality of core sheets to prepare a unit core having a predetermined thickness, arranging a plurality of unit cores in line to prepare a core band, winding coils on the core band, and connecting both ends of the core band. In this way, the stator is manufactured. Consequently, no scrap is formed from the electrical steel sheet according to the present invention.

A die preparation and exchange method wherein dies to be inserted into an injection molding machine are electrically and fluidly heated prior to insertion so as to prepare the dies to make parts more quickly. The die exchange sequence wherein a first set of dies are removed from the machine and are replaced by a second set of dies has been changed from a generally serial sequence to a sequence wherein most steps are performed in parallel or simultaneously, greatly reducing the downtime associated with mold change.

A semiconductor wafer that includes a plurality of groups of active devices or circuits on a first side of the wafer and a patterned electrical contact on the backside of the wafer. Each group consisting of an active device or circuit is intended to be diced into a discrete chip. The backside of the wafer includes a metal layer patterned into discrete spaced-apart deposits that form an electrical contact to the semiconductor and the respective group of active devices. The deposits are not contiguously or laterally connected to each other and function to protect the metal layer from peeling or detaching from the wafer during dicing of the semiconductor wafer into chips.

The invention relates to imitation marble, which comprises a waterproof surface layer, an unsaturated polyester resin middle layer and a reinforcing bottom layer. A method for manufacturing bathroom equipment by using the imitation marble comprises the following steps of: preparing unsaturated polyester resin slurry, namely coating the reinforcing bottom layer on an upper die, and coating the waterproof surface layer on a lower die; when the temperature of upper and lower dies is reduced to be between 45 and 60 DEG C, starting to close the dies, namely fixing the lower die on a die closing machine, pouring the prepared slurry into the upper die, and pushing the upper die into the die closing machine to close the dies; and screwing screws on both sides of the dies simultaneously by using apneumatic tool, overturning the dies, and conveying the dies to a ripening furnace with the temperature of between 40 and 70 DEG C for hardening molding. The imitation marble has the advantages of compact combination among materials, high waterproofness and long service life. The method for manufacturing the bathroom equipment by using the imitation marble has the advantages of simple equipment, smooth production, only 5 to 7 hours of one equipment from die preparation to finished product packaging, short time and low cost, and is suitable for large-scale production.