6results about How to "Overcoming performance deficiencies" patented technology

This invention relates to the field of polymer materials technology, and discloses a high-elasticity rubber-plastic insulated cable composite material and its preparation method. The high-elasticity rubber-plastic insulation material comprises, by weight, 40-50 parts of EPDM rubber, 20-25 parts of polyolefin elastomer, 30-35 parts of modified calcined kaolin, 3-5 parts of composite antioxidant, 2-3 parts of silane coupling agent, and 1.5-2 parts of vulcanizing agent. During preparation, EPDM rubber and polyolefin elastomer are kneaded for 5-8 minutes, then modified calcined kaolin and silane coupling agent are added and kneaded for another 8-12 minutes, followed by the addition of composite antioxidant and vulcanizing agent and kneading for 3-5 minutes. Finally, the mixture is vulcanized in stages. The first stage vulcanization temperature is 155-160℃, and the second stage vulcanization temperature is 165-170℃. The insulating material prepared by this invention has excellent elasticity, outstanding resistance to flexural fatigue, stable insulation performance, high volume resistivity, excellent aging resistance, and tight interfacial bonding. It is suitable for use in high-voltage cable insulation layers, effectively extending the service life and stability of the cable.

This utility model provides a cover for a soft gauze curtain, including a plastic cover plate, a metal plate, and a bracket. One side of the plastic cover plate is provided with a baffle, a first fixing plate, a second fixing plate, and multiple corrugated protrusions. The baffle adapts to the arc-shaped contour of the metal plate. The edge of the plastic cover plate extends with an arc-shaped plate and a plate body. The metal plate includes a first bent portion and mounting holes formed thereon. This utility model solves the performance defects of single materials through a separate design of the plastic cover plate, metal plate, and bracket. The use of the plastic cover plate improves aesthetics, while the metal plate provides the core load-bearing capacity of the soft gauze curtain, supporting the weight of the fabric and the rolling torque. The corrugated protrusions and baffle on the plastic cover plate enhance its strength, preventing deformation or even breakage. Furthermore, the interference fit between the plastic cover plate and the bracket eliminates gaps between them, preventing external dust from entering the soft gauze roll from these gaps.

This invention relates to the field of building materials technology, specifically to a self-leveling mortar based on recycled solid waste materials and its preparation method. The mortar comprises the following raw materials by weight: 100 parts additives, 120-150 parts aggregates, 0.3-0.8 parts auxiliaries, 0.05-0.15 parts cellulose ethers, 0.1-0.3 parts defoamer, and 25-35 parts water. The additives consist of granulated blast furnace slag powder, fly ash microspheres, and additive powder. The aggregates are a mixture of waste glass sand and waste stone powder. This invention solves the problems of complex processes, strong corrosiveness, and inability to dry-produce traditional alkali-activated mortars through dry-powder geopolymer activation technology. The prepared mortar has high fluidity, an ultra-long construction window, high early strength, and excellent durability. This invention achieves high-value-added resource utilization of various solid wastes, with a high solid waste content in the product, significantly reducing production costs and environmental burden, and exhibiting significant economic and environmental benefits.

The utility model relates to spring production technical field and disclose a kind of spring device pre-pressure pressurizing tool, including base, the base top is provided with pressurizing mechanism, the pressurizing mechanism top is provided with placing mechanism, the pressurizing mechanism includes processing station, the processing station fixedly connected in base top, the processing station inside fixedly connected with pressure sensor, the processing station top is fixedly connected with fixed link, the fixed link periphery is slidably connected with connecting frame, the connecting frame is set in pressure sensor top, when using, by setting pressurizing mechanism, when needing to carry out pre-pressure work to spring, first according to the size of spring body selects mutually matched connecting frame and limit sleeve, connecting frame is slidably connected in fixed link periphery, make connecting frame bottom and pressure sensor top mutual contact, limit sleeve is slid simultaneously from front to back to the inside of mounting frame, limit sleeve is fixed by fixed shaft.

This invention discloses a multicast retransmission method and system. The retransmission method includes: identifying all multicast receiving devices corresponding to the current multicast; determining whether the current network load rate exceeds a preset network load threshold range; if the network load rate is lower than the lower limit of the preset range, the multicast receiving device that lost packets sends a retransmission request broadcast signal to other multicast receiving devices, so that the multicast receiving devices with the corresponding data packets send feedback signals, thereby selecting one for retransmission; if the network load rate is higher than the upper limit of the preset range, other multicast receiving devices besides the multicast receiving device that lost packets are randomly selected, and retransmission requests are sent to other multicast receiving devices; if all retransmissions fail, a retransmission request is sent to the multicast source. This invention proposes mutual retransmission between receiving ends combined with dynamic selection based on network load, fundamentally solving technical problems such as excessive retransmission pressure on multicast sources, low retransmission efficiency, and intense network bandwidth competition.

This invention relates to the field of hot melt adhesive preparation technology, and more particularly to a method for preparing an insulating, heat-resistant, and flame-retardant hot melt adhesive for mechanical motors. The method includes determining the corresponding raw material type by obtaining the hydroxyl value index and isocyanate group index, thereby calculating the hydroxyl value deviation or isocyanate group deviation to determine the catalyst dosage adjustment range or the initial reaction temperature adjustment range; determining the reaction time for prepolymerization based on the adjusted catalyst dosage and initial reaction temperature; calculating the reaction uniformity and absorption peak intensity decay rate by real-time monitoring of the characteristic absorption peak intensity during the reaction; comparing the reaction uniformity with a preset reaction uniformity to determine whether to perform acceleration adjustment; and comparing the absorption peak intensity decay rate with a preset absorption peak decay rate to determine whether to extend the reaction time, ultimately preparing the hot melt adhesive. This invention effectively overcomes raw material batch fluctuations and process disturbances, significantly improving the consistency and overall performance of the hot melt adhesive.