40results about How to "Effective contraction" patented technology

The invention provides high performance TPU superfine fiber synthetic leather and a cleaner production method thereof. The method comprises the following steps: a piece of superfine fiber synthetic leather base cloth is dipped by a dipping tank which contains shrinking and boarding liquid, the synthetic leather base cloth enters a continuous type boarding machine, and a piece of boarding base cloth is obtained; a calendering production line is used, calendering materials are thrown into a high speed kneader for mixing, after mixing, plastication and calendering of the materials, the materials and a piece of release paper are laminated, in order to obtain a release paper laminated TPU film; a synthetic leather dry method production line with a piece of PUR scraping equipment is used, PUR is scraped on the release paper laminated TPU film, the boarding base cloth is attached, the release paper is peeled, and the product is obtained. Shrinking and boarding technology is used, in order to greatly improve flexibility, permeability and moisture permeability of the superfine fiber synthetic leather base cloth; the scraping and lamination technology of release paper transferred coating and reaction type polyurethane hot melt adhesive is used, the thermoplastic polyurethane calendering film is laminated on the superfine fiber synthetic leather base material in order to obtain the TPU superfine fiber synthetic leather with soft hand feeling, mechanical properties and good usage performance.

The invention discloses an adjustable multi-layer circuit board electric welding device, which includes a support frame and a fixed frame, and also includes a linkage mechanism. The linkage mechanism is installed at one end of the support frame, and the linkage mechanism is arranged below the circuit board outlet. The other end of the circuit board is provided with a circuit board inlet, and the first welding station, the second welding station, the third welding station and the fourth welding station are sequentially installed between the circuit board inlet and the circuit board outlet; Adjust the width between the conveyor belts, adjust the height of the welding structure through the swing arm, adjust the position of the motor through the telescopic rod to drive the transmission of the movable conveyor belt and the fixed conveyor belt, and effectively adjust the welding device from the width and thickness to make it suitable for multiple applications. The welding of multi-layer circuit boards saves equipment costs and production costs.

The invention provides a reactive power compensation configuration optimization method for a power system, and belongs to the field of reactive power compensation configuration of the power system. The method comprises the following steps: firstly, establishing an electromechanical transient simulation model of a to-be-optimized power system, and acquiring power flow data and short-circuit currentof each node in the to-be-optimized power system; after the nodes are classified, with consideration of a node load rate, obtaining an initial alternative node configured with reactive compensation,and with consideration of the effect of a reactive voltage source and a multi-infeed interaction factor, performing aggregation to finally obtain a reactive compensation alternative node of the to-be-optimized power system; and optimizing the reactive power capacity required to be configured for each reactive power compensation alternative node by adopting a genetic algorithm to obtain a reactivepower capacity optimization compensation result of each reactive power compensation alternative node. The method is easy to implement and high in accuracy, and is a practical reactive compensation configuration optimization method for the power system.

The invention relates to the field of cables, and discloses a novel cable retracting device. The novel cable retracting device comprises a cable placement box body, the cable placement box body comprises a bottom plate, front and rear side plates and left and right side plates, a cable is placed inside the cable placement box body, a wire supplying hole is formed in the left side plate of the cable placement box body, a wire outlet hole is formed in the right side plate of the cable placement box body, a rotary through hole is formed in the bottom plate of the cable placement box body, an external thread rotary rod is inserted in the rotary through hole, the outer end of the external thread rotary rod is connected with an inner thread screw sleeve in a threaded mode, the inner thread screwsleeve is located on the lower side of the bottom plate of the cable placement box body, a handle is fixedly connected to the lower end of the external thread rotary rod, a limiting plate is fixedlyconnected to the upper end of the external thread rotary rod, the limiting plate is located in the cable placement box body, a gear is fixedly connected to the upper end of the limiting plate, and racks are connected to the left end and the right end of the gear in an engaged mode correspondingly. The cable can be effectively retracted, the required length of the cable when in use is effectively controlled, and the phenomenon of cable winding or knotting is decreased.

The invention relates to suede simulation type superfine fiber synthetic leather and a clean production method thereof. The method comprises the steps of impregnating superfine fiber synthetic leather base cloth through an impregnating tank full of shrinking and kneading liquid, entering a continuous graining machine, drying the superfine fiber synthetic leather base cloth, and obtaining shrinking and kneading base cloth; adopting a flocking production line provided with PUR lattice roller coating equipment, coating PUR on the shrinking and kneading base cloth, sprinkling collagen fiber, adhering on the shrinking and kneading base cloth, cooling and winding, and placing to obtain flocking base cloth; adopting a brushing machine for removing the collagen fiber which is not firmly adhered onto the flocking base cloth, and obtaining the suede simulation type superfine fiber synthetic leather. According to the suede simulation type superfine fiber synthetic leather and the clean production method thereof provided by the invention, a shrinking and kneading technology is adopted, so that the softness, the air permeability and the water vapor permeability of the superfine fiber synthetic leather base cloth are greatly improved; a PUR lattice roller coating composite technology is adopted, so that the collagen fiber is compounded onto the superfine fiber synthetic leather base cloth, and the suede simulation type superfine fiber synthetic leather with the appearance being similar to the appearance of natural suede leather, and the mechanical property and the hygiene property being superior to the mechanical property and the hygiene property of the natural suede leather is obtained.