58results about How to "Increase mechanical tensile strength" patented technology

After melted enamel coating is discharged, a fusion process of electrical wire-to-wire connection is carried out inside a crimping connector. In the conductor connection method based on the fusion process, a plurality of enamel-coated conductor wires are inserted in the crimping connector prior to the start of the fusion process. Further, a temporary crimping process that provides the crimping connector a temporary crimping by mechanical pressurizing means is also performed. Addition of force at both end parts or either end part of the cross-section orthogonal to the axis of the above crimping connector may cause expansion, which needs to be suppressed with external force. At the same time, the cross-sectional areas corresponding to both end parts or either end part should preferably be as small as possible. The temporary crimping is applied to the crimping connector for this purpose.

The invention discloses a new line bridging method and a special bridging line. The special bridging line comprises three bridging units and a special bridge insulating rod, wherein each bridging unit comprises two fixed line clamps which are connected with a line; the bridging line is arranged between the two fixed line clamps; and the special bridge insulating rod is movably connected with the lower ends of the fixed line clamps. The line bridging method and the special bridging line can meet the requirements of bridging of lines of 110KV or less. A device has light weight and high universality, can be conveniently and flexibly operated and is safe to bridge, does not have hidden trouble, and is easy and convenient to transport, assemble and store. Working personnel do not need to work high above the ground. The structure of the bridging device does not have influence on other running equipment and has a broad operating range.

The invention relates to a multi-wire combined welding cable typed II and a production method thereof and belongs to the technical field of cables. The multi-wire combined welding cable typed II comprises current conductors, a plurality of signal control cables, an inert gas pipe, a signal control carrier line, an outer sheath and the like. The current conductors are made by twisting a plurality of flexible oxygen-free copper wires. The inert gas pipe is made of flexible elastomer combined polyvinyl chloride insulating material. The signal control carrier line is made by twisting a plurality of annealed thin tined flexible oxygen-free copper wires. The signal control carrier line in the cable core is disposed in the inert gas pipe. The current conductors in the cable core are evenly disposed outside the inert gas pipe. The signal control cables are also evenly disposed outside the inert gas pipe. Nonwoven tape is wound on the cable core. The flexible elastomer combined polyvinyl chloride outer sheath is extruded on the tape. The multi-wire combined welding cable typed II is simple and reasonable in structure, advanced in process, and superior in product performance, is high in carrying capacity in operation and wide in operation range, provides power connection and signal connection for operation of automatic welding equipment, and is conducive to implementation of automatic welding.

A method is described for producing a footbed for a shoe having an open planar formation (5), which absorbs tensile forces, and which is held freely stretched in a support frame (4), which defines the edge profile of the footbed, with the aid of a cover frame (9). To provide an advantageous bond between the planar formation (5) and the support frame (4), it is proposed that the cover frame (9) be molded in an integrally joined manner through the open planar formation (5) onto the support frame during its production from a plastic melt.

The invention discloses a new line bridging method and a special bridging line. The special bridging line comprises three bridging units and a special bridge insulating rod, wherein each bridging unit comprises two fixed line clamps which are connected with a line; the bridging line is arranged between the two fixed line clamps; and the special bridge insulating rod is movably connected with the lower ends of the fixed line clamps. The line bridging method and the special bridging line can meet the requirements of bridging of lines of 110KV or less. A device has light weight and high universality, can be conveniently and flexibly operated and is safe to bridge, does not have hidden trouble, and is easy and convenient to transport, assemble and store. Working personnel do not need to work high above the ground. The structure of the bridging device does not have influence on other running equipment and has a broad operating range.

The invention provides a cable for an electric automobile conduction charging system, and a preparation process thereof. The cable for the charging system is internally provided with seven insulation cores which are twisted to form a beam of twisted cores, the seven insulation cores are respectively two main cores, one ground core, two backup cores, one signal line and one control line, each insulation core comprises one conductor and an insulation layer wrapping the conductor, the signal line and the control line each further comprises a phase-splitting shielding layer, and the phase-splitting shielding layers wrap the insulation layers; and the external layer of the twisted cores is successively extruded by an inner sheath layer, a total shielding layer and an oversheath layer. The product provided by the invention has the advantages of quite high mechanical tensile strength, wear resistance, corrosion resistance, interference immunity, flexibility, reciprocating bendability, low-transfer impedance, vehicle rolling resistance, high appearance roundness, low production cost and the like.

The present invention relates to an automobile compressor piston, including piston pin seat. It is characterized by that side surface of said piston pin seat is made into the form of flat block, the skirt inner cavity is hollow cavity. The die equipment for making automobile compressor piston is formed from convex core for forming piston inner cavity, discharging ring, female die for forming exterior form of the piston and bottom die.

The invention discloses a method for preparing a dry-process PU / PVDF (polyurethane / polyvinylidene fluoride) hydrophobic polyurethane coating for synthetic leather. The method comprises the following steps: (1) mixing PU with PVDF; (2) adding an organic solvent with N,N-dimethylformamide (DMF) and methyl ethyl ketone (MEK) in a mass ratio of (0-50): (0-20), adding a color paste aid to prepare a surface layer, preparing a bonding layer in a ratio of PU to DMF to MEK to color paste of (0-100): (0-50): (0-20): (0-15), and fully stirring slurry of the surface layer and a surface material of the bonding layer by a vacuum mixer at room temperature respectively to form viscous solution slurry; and (3) applying a dry-process surface layer coating to release paper, solidifying for forming to obtain a dry-process PU / PVDF surface layer, applying the bonding layer to the surface layer, bonding a wet-process base material of the synthetic leather with the dry-process surface layer by a semi-dry bonding method, and drying and curing to obtain the dry-process PU / PVDF hydrophobic polyurethane coating. After PU / PVDF blending modification, the coating is high in hydrophobicity, pollution resistance, flame retardance coefficient and mechanical tensile strength; the method is simple, low in requirement and low in cost and facilitates industrialization production application of the synthetic leather.

The invention discloses a composite insulator hardware pressing die. The composite insulator hardware pressing die comprises a pre-pressing die body and a secondary pressing die body, wherein the pre-pressing die body and the secondary pressing die body are not concentric, the pre-pressing die body and the secondary pressing die body are each formed by arranging multiple die body blocks in the circumferential direction, and a gap is reserved between every two adjacent die body blocks. The invention further discloses a pressure welding technology of composite insulator hardware. According to the pressure welding technology of the composite insulator hardware, primary pressure welding and secondary pressure welding are conducted, the pre-pressing die body is installed on a primary pressing machine, one end of the pre-pressing die body is tightly attached to the encapsulated end of the hardware during pre-pressing of the hardware, and then pre-pressing pressure welding is conducted; encapsulated hardware which is obtained through injection molding is placed on the secondary pressing die body, one end of the secondary pressing die body is close to the encapsulated end of the hardware, then secondary pressing is conducted on a first section, and then pressing is conducted on other sections behind the first section in sequence. The composite insulator hardware pressing die is reasonable in structure, the pressing technology is simple, and stress of the pressed surface of the hardware is even; compared with a traditional pressing technology, the area of the pressed surface of the hardware is effectively increased, the mechanical tensile strength of a composite insulator is improved, and safe operation of the composite insulator is guaranteed.