40results about How to "Easy to compact" patented technology

The invention relates to a method for extruding and molding metal powder gelatin, which belongs to the field of metal part preparation in powder metallurgic production technology. The method is characterized by comprising the steps: firstly, premixed liquid with finite concentration is prepared; then, metal powder is added into the premixed liquid to prepare a stable gelatin system; the stable gelatin system is extruded and molded to prepare a blank body; and finally, the blank body is sintered into a part. The invention breaks through the traditional molding technology and can prepare metal products with large sizes and complicated shapes. Compared with the pressure molding, the invention solves the problems of complicated shape limitation and energy consumption caused by overlarge pressure needed by molding, and greatly improves the molding condition. Compared with the injection molding and the hot pressure casting molding which need to be added with a lot of organic binding agents, the method does not need a special degreasing step, has simple technology and can greatly reduce the production cost.

The invention provides a method for preparing a boron carbide ceramic material through low-temperature fast sintering. The method is characterized in comprising the following steps: a hard template is adopted as a structure-directing agent; porous boron carbide powder is synthesized with a nano-scale casting method; the porous boron carbide powder is added into a graphite mold, and the mold is placed into a chamber of a spark plasma sintering furnace; sintering is carried out under vacuum and in an inert or reductive atmosphere; after sintering, the product is cooled to room temperature with the furnace; and grinding is carried out, such that the boron carbide ceramic material is obtained. According to the low-temperature fast sintering boron carbide ceramic preparation method, the porous boron carbide powder is adopted as a sintering raw material. The porous boron carbide powder has the advantages of large specific surface area, high surface energy, good sintering activity, and the like, such that the powder is easier to be densified during sintering. Also, pressurization can be realized during a sintering process with a spark plasma sintering technology, such that pore collapse and densification of the porous boron carbide powder can be facilitated, and thus the boron carbide ceramic can be obtained under a relatively low temperature. The technology has advantages of fast temperature increasing speed, short sintering time, and the like. The method is an energy-saving and environment-friendly preparation method, and has good application prospect.

The invention discloses a sintering method of ZrB2-SiC superhigh temperature ceramics and relates to a sintering method of superhigh temperature ceramics. The invention aims at solving the problems of high sintering temperature and high energy consumption in the existing process of preparing ZrB2-SiC superhigh temperature ceramics. The method comprises the following steps of: weighing ZrB2 powder, SiC powder and citric acid; ball-milling and mixing to obtain slurry; drying the slurry to obtain composite powder; and performing vacuum sintering at the temperature of 1500 to 1600 DEG C to obtain the ZrB2-SiC superhigh temperature ceramics. According to the sintering method of the ZrB2-SiC superhigh temperature ceramics provided by the invention, the sintering temperature is lowered by about 300 DEG C, thus energy consumption is reduced. The density of the obtained product can achieve 98%, thus the requirement of being used in oxygen-containing atmosphere at the temperature of 1800 DEG C is met. The method is used for preparing the ZrB2-SiC superhigh temperature ceramics.

The invention relates to a high-entropy ceramic material with excellent tribological properties. The material is block-shaped, the composition of the material is (Hf-Mo-Nb-Ta-Ti-) C, the ceramic material is prepared from the following raw materials in percentage by mass: 1.2 to 21.9 percent of HfO2, 14.5 to 15.0 percent of MoO3, 13.4 to 13.8 percent of Nb2O5, 2.3 to 23.0 percent of Ta2O5, 8.0 to 8.3 percent of TiO2 and 18.0 to 20.6 percent of graphite powder. Meanwhile, the invention further discloses a preparation method of the high-entropy ceramic material. The ceramic material provided by the invention has good tribological properties and mechanical properties in a wide temperature range, and can realize lubrication at a specific temperature, thus realizing structural/lubricating function integrated design of the ceramic material.

The invention relates to a water plugging method of establishing a large-area chemical partition plate in a gas-water interface of a water-bearing gas reservoir. The method comprises the following steps that (1) an aqueous-phase solution is injected into a gas-water interface of a gas reservoir and is transported to a water layer under the effect of diffusion and dispersion; (2) an oil-phase solution is injected into the gas-water interface of the gas reservoir and is spread in the gas-water interface to replace the gas-water interface with an oil-water interface; (3) an aqueous-phase monomeris diffused towards the oil layer, and a region, close to an oil phase, of the oil-water interface generates polymerization reaction with an oil-phase monomer to form a microporous polymer interlayer;and (4) formation water permeates into the polymer interlayer under the effect of a pressure difference, and mineral ions and impurities continuously deposit to form scales on the polymer interlayerto form a water-impermeable polymer interlayer. The method is reliable in principle and simple and convenient to operate, can effectively solve the problems of small plugging range, low plugging strength and the like of a common water plugging system in the process of water invasion treatment of the edge-bottom water-bearing gas reservoir and has a great practical significance of efficient miningthe edge-bottom water-bearing gas reservoir.

The brick paving equipment for municipal engineering. The equipment comprises an equipment body, an auxiliary bulldozing device and a comprehensive compaction device, wherein a push handle is fixedlyconnected to the outer wall of one side of the equipment body, a feeding hopper is fixedly installed on the outer wall of the top of the equipment body, and two rolling wheels are fixedly connected tothe outer wall of the bottom of the equipment body. Through the arrangement of the auxiliary bulldozing device, when two hydraulic cylinders are started at the same time, a driving air cylinder and an attaching plate move downwards at the same time, and when the auxiliary bulldozing device moves to one side of a laid brick, the driving air cylinder is started, a moving block and a connecting plate move rightwards at the same time, and the inner wall of a wedge-shaped groove slides on the inner wall of a trapezoidal groove; when the connecting plate moves, the second push plate is driven to move towards the side close to the first push plate, the first push plate and the second push plate gradually get close to each other to conduct bulldozing treatment on the newly laid bricks, the distance between the bricks and the last brick is made to be closer, gaps are small, and loosening between the bricks is avoided; the laying effect is better.

The invention discloses a pavement patching device for highway machinery, and relates to the technical field of highway machinery. The pavement patching device for the highway machinery comprises a frame. A water tank is fixedly mounted at the top of the frame, a fixed base is fixedly mounted on the inner wall of one side of the frame, a stirring box is arranged above the fixed base, and supporting legs are fixedly mounted at the top of the fixed base. According to the pavement patching device for highway machinery, a water tank, a water pump, a hose, a nozzle, a fixing groove and an water inlet pipe are used cooperatively; the hose and the spray head are clamped and mounted on the fixing groove; a user can take the spray head to spray water to clean the ground and cracks needing to be repaired; and the handheld spray head is convenient for a user to use, and a situation that the repaired ground is not cleaned up so that the repairing of the pavement is influenced, the asphalt concreteis not in full contact with a repairing area, a repairing effect of the pavement is influenced, and the quality of the repaired pavement is poor is avoided.

The present invention is a molded body (1) for joining constituted by an aggregate in which Cu-core Sn-shell powder has been compressed. There is an activating agent-containing substance (3) for removing oxides from surfaces of the powder in both open holes and closed holes present inside the molded body for joining. The molded body for joining contains 55-95 wt.% of Cu and 45-5 wt.% of Sn. The activating agent in the activating agent-containing substance is included in a ratio of 0.01-2 wt.% to 100 wt.% of the molded body for joining. The thickness is 20-400 [Mu]m.

The invention provides a carpet lawn and a preparation method thereof. Fishing nets are added in a lawn planting process to obtain the novel carpet lawn. The preparation method of the carpet lawn is simple in technical process, low in cost and quick in lawn forming, and a quantitative proportion of a penetration medium to an adhesion medium of a root system of the lawn is increased by means of improvement of porosity of the adhesion medium; the perfectness ratio of the lawn is increased in a lawn cutting and transporting process by means of improvement of flexibility of the adhesion medium. The carpet lawn is low in cost, easy to cut and high in perfectness ratio due to transport in a rolled manner. A laying method of the carpet lawn is simple, a rejuvenation period can be shortened while management cost is reduced, and an optimal landscape effect of the lawn is achieved. Due to high flexibility of the fishing nets, the lawn is easy to stretch and compact in a laying process, the lawn can closely contact with soil by means of trimming and jointing, and high flatness, quickness in rooting of the root system and excellent landscape effect are achieved.

The invention discloses a coal mining sampling device capable of conveniently cleaning chippings. The coal mining sampling device comprises a sampling pipe body, an extension pipe body, a gear motor and a storage battery, the extension pipe body is installed in the upper side of the sampling pipe body, and the lower end of the extension pipe body is fixedly connected with a connecting block; ,crushing claws are fixedly connected to the outer side wall of the lower end of the sampling pipe body at equal angles through bolts, a mounting pipe is mounted on the inner side of the lower end of the sampling pipe body, a gear motor is mounted in the upper end of the sampling pipe body through bolts, a threaded rod is fixedly connected to the output end of the gear motor and the threaded rod is connected with the square rod part of the push rod in a penetrating manner. According to the coal mining sampling device capable of conveniently cleaning chippings, automatic material taking of samples is achieved, the samples can be conveniently compacted, the integrity of the samples is guaranteed, in addition, automatic cleaning of the inner wall of the storage tank is achieved while discharging is conducted, and subsequent use is prevented from being affected by coal slag residues.

The invention discloses waste disposal equipment for factory production. The waste disposal equipment comprises a box body, wherein a scrap iron box is fixedly mounted above the left side of the box body; the scrap iron box is fixedly mounted at the upper end of the left side of the box body, so that scrap iron is conveniently stored into the scrap iron box; the inner wall of the left side of thescrap iron box is connected with a pushing plate through a telescopic pole; the left side wall of the pushing plate is equipped with a pushing rod, so that scrap iron in front of the pushing plate canbe pushed into a guide tube; the telescopic pole achieves the guide effect and the fixing effect on the pushing plate; an electric pushing rod is fixedly mounted above the box body; the lower end ofthe electric pushing rod is fixedly equipped with a compacting disc, so that scrap iron inside an extruding barrel is compacted conveniently; a glass plate is mounted above the front wall of the box body, so that height of the scrap iron inside the extruding barrel is conveniently observed; and a baffle plate is placed on a fixed plate for sealing the lower end of the extruding barrel, and a leaking hole is formed in the middle part of the fixed plate, so that the compacted scrap iron is leaked conveniently.

The present invention is a joining molded article (1), composed of a compressed aggregate of a Cu-core Sn-shell powder (2), an activator-containing substance (4) for removing an oxide from a powder surface being present in open pores in a surface part and inside of the joining molded article, and the joining molded article containing Cu in a ratio of 55-95% by mass and Sn in a ratio of 45-5% by mass and having a thickness of 20-400 [mu]m.

The invention discloses a corrugated board processing and bonding device. The corrugated board processing and bonding device comprises a working table, wherein two side plates are fixedly mounted on one side of the working table; a conveying mechanism is fixedly mounted on one side of the two side plates; the conveying mechanism comprises six guide rollers; a box paper board, a wave sandwich boardand a box paper board are sequentially embedded between every two adjacent guide rollers from top to bottom; and one end of each of the six guide rollers is connected with a third circular tooth in asleeving manner. According to the corrugated board processing and bonding device, a gluing device is mounted, a glue pump is used for pumping glue in a glue storage box into a discharging groove in afixing block, the glue is uniformly sprayed on two surfaces of the wave sandwich board through a spray head at the bottom end of the fixing block, and in the spraying process, glue liquid is heated through electric heating wires mounted in cavities on two sides of the discharging groove, so that the solidification time of the glue is prolonged, manual gluing is replaced, the labor intensity is effectively reduced, and meanwhile, the influence on the firmness of bonding between the box paper boards and the wave sandwich boards due to premature solidification of the glue in the bonding processis avoided.