43results about How to "Avoid softening and deformation" patented technology

The invention discloses a lost foam casting method for a heavy casting. The method comprises the following steps of: a. manufacturing a foam model; b. mounting a counter-deformation bracket: manufacturing the steel-structured counter-deformation bracket according to the size and the length of a workpiece and placing the counter-deformation bracket on the bottom of the foam model; c. painting: the thickness of the paint is not less than 4mm; d. drying: placing the painted foam model in a drying room for drying at the constant temperature of 50 DEG C; e. fixing core: placing the steel-structured bracket in an inner cavity of the foam model so as to fix the model, and putting the whole foam model into a sandbox together; f. boxing: enabling the sandbox containing the foam model to drop sand evenly, vibrating the sandbox during sand dropping, gradually enhancing the vibration amplitude with the increasing of added sand quantity, mounting a main runner and a branch runner of a ceramic tube, and placing a pouring cup; g. pouring: opening a vacuum pump for vacuum pumping before pouring; h. releasing negative pressure: after pouring, keeping the negative pressure for 8 to 15 minutes until solidification of an iron liquid, and then releasing the negative pressure; and i. cleaning.

An electric connector (6) to be attached to a plate-like connection member (4; 100) having an edge portion (402; 102), a plurality of insertion convex portions (12; 103) formed sideways at the edge portion (402; 102), and a conductive portion (8; 8B; 103a, 103b) formed on at least one of the front surface (4a; 103a). The back surface (4b; 103b) of each insertion convex portion (12; 103) includes an insulating housing (13) and a contact forming member (14; 14A; 14B; 14B'; 14C; 14C'; 14D; 14E; 14F; 14G; 14H; 14J) made of a metal and held in the housing (13). The contact forming member (14; 14A; 14B; 14B'; 14C; 14C'; 14D; 14E; 14F; 14G; 14H; 14J) includes a box-like portion (33; 33D) having four.walls (41, 42, 43, 44; 41D, 42D, 43D, 44D) and a connection member connecting contact (34; 34B) extended from at least one of the walls of the box-like portion (33; 33D). The four walls (41, 42, 43, 44; 41D, 42D, 43D, 44D) define an insertion concave portion (45) into which the insertion convex portion (12; 103) corresponding thereto is inserted along a predetermined insertion direction (P1). The connection member connecting contact (34; 34B) includes a contact portion (475; 475A; 475B; 475C; 475D; 475E; 475F; 475G; 475J) that makes contact with the conductive portion (8; 8B; 103a, 103b) of the corresponding insertion convex portion (12; 103) inserted into the insertion concave portion (45).

The invention discloses an environment-friendly and degradable thermal insulation food packaging bag. A preparation method comprises the following steps that (1) a modified silica sol is prepared; (2)a prepared titanium dioxide sol is added to the modified silica sol to obtain a composite sol; (3) the composite sol is sprayed on the surface of a substrate, after drying, cyclic heat treatment is performed, and a coating is removed after cooling and pulverized and ground to obtain composite powder; (4) sodium periodate is added into a sodium alginate solution, and a light avoiding reaction is performed to obtain modified sodium alginate; and (5) polyvinyl alcohol is dissolved and then added with the modified sodium alginate for reaction, an obtained product and the composite powder are added into molten polyethylene, then citric acid, calcium stearate and talc are added, and processing is performed to obtain the required packaging bag. The food packaging bag has an excellent thermal insulation effect, can effectively avoid softening and deformation of candy, has good biodegradability, can achieve complete degradation, meets the environmental protection requirements and is easy to popularize and apply.

The invention relates to a welding method of a composite copper bar conducting layer. A welding part of a lead workpiece is positioned on a mounting part of a copper bar substrate by a positioning structure, so that next welding is facilitated. After positioning, a resistance soldering technology instead of chamfering is adopted, so that the mounting part can be arranged in any position of the copper bar substrate, the lead workpiece can be welded on the mounting part, a complicated composite copper bar product comprising a small forming part structure is obtained, and the welding strength and the connection reliability are improved. A non-welding part of the lead workpiece is placed in a heat-dissipation mold, so that heat of the non-welding part of the lead workpiece conducted by welding can be dissipated by the heat-dissipation mold, the non-welding part of the lead workpiece can avoid softening deformation and hardness and strength reduction due to overheating, the hardness and the strength of the non-welding part are ensured, and torsion resistance of riveting a nut in a non-welding area is ensured. In addition, the invention further relates to a composite copper bar.

The invention provides a crystal pulling method, a single crystal furnace and a computer readable storage medium, and relates to the technical field of solar photovoltaics. The method comprises the steps that loading an initial raw material into a crucible, wherein the distance between the initial raw material and the upper edge of the crucible is made to be smaller than or equal to a first presetdistance; forming an initial melt: providing a main heater opposite to the side wall of the crucible and an auxiliary heater opposite to the bottom wall of the crucible, heating at a first power by using the main heater, heating at a second power by using the auxiliary heater, the first power being smaller than the second power, and enabling the initial raw material in the crucible to form an initial melt; and pulling the single crystal: in the isodiametric process of pulling the single crystal, adding an additional raw material into the crucible according to the weight of the pulled single crystal. The side wall of the crucible which does not contain the initial raw materials is prevented from being deformed by dry baking, the deformation of the side wall of the crucible caused by overhigh heating power of the main heater is avoided, the temperature fluctuation is small, and crystal pulling is facilitated.

The invention relates to a 3D printer for chocolate shaping based on Internet of things. The 3D printer comprises a main body, a platform, a moving arm and a spray nozzle, and also comprises a processing mechanism and a temperature lowering mechanism, wherein the processing mechanism comprises a heating chamber and two processing assemblies; each processing assembly comprises a crushing assembly and a stirring assembly; the temperature lowering mechanism also comprises an ascending and descending assembly and an air blowing assembly. The 3D printer for chocolate shaping based on Internet of things has the advantages that through the processing mechanism, the solid chocolate can be crushed and stirred, so that the chocolate pulp fusion and mixing effect is better; the mouthfeel is the chocolate is improved; in addition, the 3D printer is applicable to solid and liquid state chocolate; the stirring effect is better; through the temperature lowering mechanism, the uniform heat radiation is realized on different height of a printed article, so that the chocolate pulp is shaped after being cooled; the collapse and fracture of the printed articles due to substrate softening deformation are avoided; the printing time is saved; the printing work effect is improved; the practicability and the reliability of the 3D printing equipment are greatly improved.

The invention discloses waste plastic regenerated environment-friendly particles and a production process thereof. According to the process, poly-3, 5- diamino-1H-pyrazole-4-carboxylic acid allyl ester and 2, 3, 5, 6-tetrafluoroterephthalic acid amide are added, and the fluorobenzene structures are introduced, the weather resistance and the corrosion resistance of the material are higher; with introduction of pyrazole structures, the ultraviolet aging resistance and the flame retardance of the material are further improved; the tensile strength of the prepared waste plastic regenerated environment-friendly particles is 54.7-55.2 MPa according to GB/T1040-2006 measurement, the limit oxygen index is 38.239% according to GB5454-85 measurement, and the technical problems in the prior art thatwaste plastic is not high in strength and prone to combustion are solved.

The invention relates to a novel end head high-temperature protection structure and novel traction rope end head structure. The end head high-temperature protection structure comprises a heat-shrinkable sleeve which can be mounted on an end head as well as a modified glass fiber which coats the heat-shrinkable sleeve and has flame-retardant and heat-insulation performance; and the end head high-temperature protection structure is characterized in that the heat-shrinkable sleeve is made of a heat-shrinkable shape memory material. The traction rope end head structure comprises an end head for fixing a rope body, a modified glass fiber arranged on the surface of the end head and a modified glass fiber coating the surface of the heat-shrinkable sleeve; and the traction rope end head structureis characterized in that the heat-shrinkable sleeve is made of a shape memory material. The novel end head high-temperature protection structure and traction rope end head structure have the beneficial effects that the situation that a locking function is influenced due to the fact that the temperature of the end head is too high under extreme high-temperature conditions can be avoided, so that the rope body of the end head of an elevator rope does not melt, deform, loosen and slide off when being subjected to heating, and thus accidents can be completely avoided.

The invention discloses a preparation process of a solid floating ball for marine product culture. The preparation process of the solid floating ball for marine product culture comprises the followingsteps of floating ball shell forming, jacket mounting, foaming material casting and jacket dismounting. An inner cavity matched with the size of a shell is arranged in a jacket, and a heat exchange mechanism is arranged in the jacket. Through the above manner, the solid floating ball high in external strength and even in internal foaming can be obtained, the service life of the floating ball forculture can be effectively prolonged, and the problem that water enters a hollow floating ball due to shell damage, and consequently the floating ball fails is avoided; and the floating ball can be recycled and then utilized after the floating ball reaches the service life period, and resource and environment waste is further reduced.

The invention relates to the technical field of power cables, and especially relates to a power cable with a cross-linked polyethylene insulated polyvinyl chloride sheath. The power cable comprises aheat conduction filling core; an anti-interference layer is fixedly connected to the inner side of each of a plurality of uniformly distributed mounting holes formed in the heat conduction filling core; the inner side of each anti-interference layer is fixedly connected with a high-temperature-resistant layer; the inner side of each high-temperature-resistant layer is fixedly connected with an insulating layer; each insulating layer is internally provided with a spiral hole; the inner side of each spiral hole is provided with an inner wire core; the outer side of each inner wire core is fixedly connected with a plurality of uniformly distributed outer wire cores; and each outer wire core is fixedly connected to the inner side of the spiral hole. By arranging the heat conduction filling core, the high-temperature-resistant layer, the anti-interference layer, the tensile layer, a high-elasticity springback rope, a waterproof and damp-proof layer, a protective sheath and wear-resistant strips, the cable has high high-temperature resistance, heat conduction, tensile strength, wear resistance and the like, and has anti-interference, anti-breaking and springback functions and the like.

The invention discloses a humic acid compound fertilizer spraying, granulating and drying process and granulating and drying equipment. The humic acid compound fertilizer spraying, granulating and drying process comprises the steps that lignite is crushed into 60-80 mesh particles, then water and dilute alkali liquor with the concentration of 2% are added, coal, alkali and the water are added into a mixing dissolving tank, the ratio of the coal to the alkali to the water is 100: 6: 400, steam is introduced, when the temperature reaches 80 DEG C, the temperature is controlled to be 80 DEG C, and heat preservation is performed for 1 hour; S2, slurry is pumped into a settling tank for settling for not less than 24 hours so as to fully settle insoluble impurities, after settling is finished, liquid containing humic acid on the upper layer is pumped, the liquid is pumped into a filter tank for filtering and filter pressing treatment, and impurities and insoluble substances in a humic acid aqueous solution are removed by utilizing a filtering and filter pressing method. According to the humic acid compound fertilizer spraying, granulating and drying process and the granulating and drying equipment, the problems that traditional monoammonium phosphate spraying, granulating and drying equipment is not suitable for humic acid compound fertilizer, and continuous production is difficult are solved, particle breaking and softening deformation caused by high temperature are avoided, and a good effect is achieved.

The invention relates to a manufacturing method of a heat-resistant plastic bottle. The manufacturing method comprises the steps of 1 material preparing, 2 feeding, 3 embryo preparing, 4 molding, 5 demoulding, 6 disinfection, and 7 packaging. According to the invention, a high-temperature-resistant additive is added when the plastic bottle is prepared, so that the prepared plastic bottle is good in heat resistance, softening deformation caused by temperature rise is avoided, the application range is expanded, the manufacturing method is simple, and the production is convenient.

The invention discloses an anti-fouling protective film for lacquer of a rail traffic vehicle. The protective film comprises a base material layer, an anti-fouling layer is arranged on one side of thebase material layer, the water contact angle of the anti-fouling layer is larger than 70 degrees, the other side of the base material layer is provided with a bonding glue layer bonded with the lacquer of the rail traffic vehicle, and release force of bonding glue is larger than 15 N/25 mm and smaller than 30 N/25 mm. The protective film adopts a hydrophobic coating and has a hydrophobic effect similar to surface layers of lotus leaves, thus ordinary fouling has difficulty in adhering to the surface layer of the protective layer, and cleaning is convenient; the anti-fouling protective film further has the function of naturally repairing slight scratches in the surface of the protective film, and the lacquer can be protected to the utmost extent; and the anti-fouling layer of the protective film is dried and cured through a UV-LED photocuring process, the drying temperature can be decreased, using of a solvent in the coating process is reduced, and economical efficiency and environmental protection are achieved.