31results about How to "Not easy to heat deformation" patented technology

The invention provides an electromagnetic relay having a small number of components and a few assembly man-hours. The shaft part 27, provided at the lower end part of a movable iron member 26, is engaged with a recessed part for positioning provided at the base part of a spool 13, and the shaft part 27 of the movable iron member 26 is prevented from pulling off, capable of rotation by the magnetic pole section 24 positioned at the lower end part of the iron core 22 assembled at the spool 13.

The invention discloses a bi-component epoxy resin binder, which mainly comprises the following components in parts by weight: 40-80 parts of epoxy resin (a), 1-30 parts of polyurethane prepolymer (b), 10-30 parts of acrylic ester (c) and 1-30 parts of diluent (d). The binder is of a bi-component system, and the acrylic ester and organic peroxides are separately stored. The polyurethane prepolymer is mixed with other components at the temperature of not higher than 60 DEG C. According to the invention, the binder with improved heat resistance and high-temperature toughness is prepared by taking the polyurethane prepolymer as a toughening component through an interpenetrating polymer network (IPN) synthesis method. The binder is used for manufacturing a die for casting metal castings, and thereby, the high-temperature strength of a core mold can be increased. The invention also provides a cast mixture containing the bi-component epoxy resin binder, a cast molding body obtained from the cast mixture, a method for casting metal products by using the molding body and the castings obtained by the method.

A headlamp for vehicles, wherein a body support portion (22c) of a light source bulb (22) is slidingly engaged with an inner peripheral surface of an annular wall (24B) of a reflector (24), and the flange portion (24d) ) abuts against the rear end surface of the annular wall (24B), and in this state, the flange portion (24d) is clamped from the front and rear sides by the annular wall (24B) and the light bulb fixing member (32), thereby placing the light source The bulb (22) is fixed on the reflector (24). Three cutout holes (24m) penetrating through the annular wall (24B) are formed in front of the sliding engagement position between the annular wall (24B) and the body support portion (22c) of the light source bulb (22). The inner space of the reflecting mirror (24) is communicated with the outer space through these cutout holes (24m), and the heat inside the reflecting mirror (24) is dissipated to the outside, which can prevent the high temperature of the reflecting mirror and reduce the possibility of thermal deformation of the reflecting mirror, etc. sex.

The invention provides a radiation cross-linked polypropylene foaming material, a preparation method and applications thereof, wherein the raw materials comprise, by mass, 60-99% of polypropylene and1-40% of a radiation cross-linked polymer. The preparation method comprises: carrying out irradiation on a mixture sheet prepared from polypropylene and a radiation cross-linked polymer under an inertatmosphere, and foaming under a supercritical carbon dioxide condition. According to the present invention, the preparation method has characteristics of simpleness, convenience, high success rate, environmental protection and substantially-improved foaming temperature window, further improves the mechanical properties of the obtained foamed material, and is suitable for industrial application; and the radiation cross-linked polypropylene foaming material has characteristics of small pore size of the foamed pores, large hole density, light weight, good mechanical property, good sound insulation and noise reduction effect, no odor and environment protection.

The present invention addresses the problem of providing a white-reflecting film that resists deflecting under heat while having exceptional reflection characteristics. The problem is overcome by a white-reflecting film that has a reflective layer A, wherein the white-reflecting film satisfies either condition (a) or condition (b) that the reflective layer A (a) comprises a thermoplastic resin composition A1 containing calcium carbonate particles in a thermoplastic resin A, the content of the calcium carbonate particles being 10-70% by mass with respect to the mass of the thermoplastic resin composition A1, or (b) comprises a thermoplastic resin composition A2 containing calcium carbonate particles in the thermoplastic resin A, and a resin that is incompatible with the thermoplastic resinA, the content of the calcium carbonate particles being 5-69% by mass with respect to the mass of the thermoplastic resin composition A2, the content of the incompatible resin being 1-40% by mass withrespect to the mass of the thermoplastic resin composition A2, and the combined content of the calcium carbonate particles and the incompatible resin being 10-70% by mass with respect to the mass ofthe thermoplastic resin composition A2. The calcium carbonate particles have an average grain size of 0.1-1.2 [mu]m. The relationship (D90 D10)/D50 <= 1.6 is satisfied, where D10, D50, and D90 are the 10%-, 50%-, and 90%-volume grain sizes, respectively, integrated from the small grain size side. The white-reflecting film has a reflectivity of at least 60%.

The invention relates to the technical field of building materials and especially relates to a foaming ceramic damp-proof wood plastic plate and a preparation method thereof. The foaming ceramic damp-proof wood plastic plate provided by the invention comprises the following raw materials in parts by weight: 10-20 parts of coal gangue, 10-20 parts of ceramic tile residue, 8-18 parts of wood powder,3-9 parts of glass beads, 4-12 parts of calcined talc, 3-10 parts of fluorite, 5-15 parts of silicon carbide, 2-6 parts of expanded graphite, 2-8 parts of zirconium oxide, 1-4 parts of polypropylenefibers and 1-3 parts of antibacterial agent. The preparation method for the foaming ceramic damp-proof wood plastic plate provided by the invention comprises the following steps: (1) spray-drying andsieving; (2) mixing and quickly stirring; (3) mixing and grinding; (4) mixing and pelletizing; (5) die-filling and calcining. The foaming ceramic damp-proof wood plastic plate has excellent compression-resisting and wear-resisting properties, has damp-proof and antibacterial properties, is free from mildewing and deformation after long-term use, is long in service life and has excellent comprehensive mechanical properties. The preparation method is simple and the end product is high in quality.

The invention discloses a pruning machine, wherein a steel wire shaft (7), an upright rod (12), a switch top block (13), a main button (2), a lifting plate (8) and an inching switch (6) are arranged at the left of a motor component (5), a draw plate (10) and a sub button (4) are arranged at the right of the motor component (5), two ends of the steel wire shaft (7) are respectively connected with the right end of the main button (2) and the left end of the lifting plate (8), a rigid metal rod (9) is connected between the right end of the lifting plate (8) and the upper end of the draw plate (10), the lower ends of the draw plate (10) and the sub button (3) are hinged with a shell (11), the lifting plate (8) is sliding sheathed on the upright rod (12) sheathed by the switch top block (13), and the inching switch (6) is above the switch top block (13). The invention has the advantages that the invention can turn on and off motor with small force and can prevent thermal deformation of driving mediums caused by the heat radiation of motor.

The invention discloses a graphite modified polytricyclopentadiene PTCPD composite material and a preparation method thereof. The composite material comprises graphite and tricyclopentadiene, and the graphite and the tricyclopentadiene are polymerized into a polytricyclopentadiene/graphite composite material under the action of a catalyst. The graphite is expanded graphite or graphite oxide modified by a surfactant or a coupling agent. The graphite modified polytricyclopentadiene composite material provided by the invention solves the technical problems of insufficient rigidity and poor heat resistance of a polydicyclopentadiene material in the prior art, and through graphite modification, the composite material has better heat resistance, the surface of the material is not easy to thermally deform, and the wear resistance is enhanced. The graphite modified polytricyclopentadiene composite material also has the excellent characteristics of acid resistance, alkali resistance, brine corrosion resistance, halogen gas corrosion resistance, fatigue resistance and the like, and is wide in application range.

The invention discloses a hydraulic motor with an integral output shaft. The hydraulic motor comprises a shell, the integrated output shaft, a thrust plate, a retainer plate, a plunger, a cylinder body and an end cover, wherein the integrated output shaft is sequentially equipped with a front contact section, a spherical section, a middle contact section, a synchronous section and a rear contact section from front to back in the axial direction; the front contact section is rotatably connected to the front end of the shell through a front bearing; a special-shape spring is arranged on the spherical section in a sleeving manner, and the spherical section is elastically connected with the rear surface of the retainer plate through a special-shape spring; the middle contact section is a convex ring retaining shoulder and is resisted against the front end of the cylinder body; the synchronous section is arranged in the cylinder body and is connected with the cylinder body; the rear contact section penetrates through a flow distribution plate and is rotatably connected with the end cover through a rear bearing; and a floating piston ring is arranged at the front end of the end cover, and a corrugated spring is arranged between the floating piston ring and the end cover. According to the hydraulic motor with the integral output shaft disclosed by the invention, a ball joint structure of a ball joint type output shaft is eliminated, the influence of the coaxiality on the quality and the performance of products during processing of the products can be greatly reduced, the reliability is high, the structure is simple, the hydraulic motor is mounted and maintained more conveniently.

Provided is a chuck table. In a pin chuck table, a plating layer that does not peel off during turning is formed on a material that is not susceptible to thermal deformation. The chuck table (30) usedin a machining device (1) for turning an upper surface (Wa) by means of a tool (64) by holding a lower surface (Wb) of a plate-shaped workpiece (W) by suction has: an outer circumferential annular wall (300) for supporting an outer circumferential portion of the lower surface of the plate-shaped workpiece by means of the annular upper surface (300a); a suction recess (301) formed on the inside ofthe outer peripheral annular wall (300) and having a lower bottom surface (301b) than the upper surface of the outer peripheral annular wall; a suction port (301c) that is formed in the bottom surface of the suction recess (301) and communicates with a suction source (36); and a plurality of support pins (304) vertically formed in the bottom surface (301b) at equal intervals in a manner of avoiding the suction port; the upper surface (304a) of the support pins and the upper surface (300a) of the outer peripheral annular wall (300) are at the same height, and plating layers (M) are formed on the side surfaces (300c, 300d) and the upper surface (300a) of the outer peripheral annular wall and on the side surfaces (304c) and the upper surface (304a) of the support pins (304).

The invention discloses a preparation method and application of a high-strength plastic pipe material. The method comprises the following steps: adding acetal resin, n-butyl acrylate and dioctyl terephthalate into a high pressure reactor; adding phthalic anhydride for high-temperature reaction; then, carrying out mixing on polypropylene, polyvinyl chloride and epoxidized soybean oil, and carryingout cold mixing with erucyl amide; adding mixture and erucyl amide into an internal mixer to be mixed with phosphoric acid tritolyl ester and pentaerythritol; finally, carrying out modeling through aconfluence core and a die head to obtain a finished product. The prepared plastic pipe material has the advantages of high tensile strength, high impact resistance, small possibility of thermal deformation and a good application prospect in building drainage pipeline engineering.

The invention is applicable to the technical field of composite materials, and provides a preparation method of a carbon fiber composite material and the carbon fiber composite material, wherein the preparation method of the carbon fiber composite material comprises the following steps: kneading hollow glass bead powder, epoxy resin, a microfiber material and a coupling agent to obtain a filling material; and putting the filling material into a mold, and carrying out pressure thermal forming treatment to obtain the carbon fiber composite material. According to the preparation method of the carbon fiber composite material provided by the embodiment of the invention, the hollow glass bead powder, the epoxy resin, the microfiber material and the coupling agent are used as raw materials, so that the prepared carbon fiber composite material is light in specific gravity, is not easy to thermally deform during heating and pressurizing, does not generate a secondary foaming phenomenon, and canbe used as materials of carbon fiber bicycles, badminton rackets, soles and the like.

The invention provides a clutch pressure plate which comprises a pressure plate body, long reinforcing ribs, short reinforcing ribs, pressure plate teeth, convex lugs, mounting holes, U-shaped groovesand U-shaped heat radiation through holes. The multiple pressure plate teeth are arranged on the end face of the pressure plate body. The long reinforcing ribs and the short reinforcing ribs are located on the outer sides of the pressure plate teeth. The convey lugs are evenly distributed on the outer diameter of the pressure plate in the circumferential direction, and the mounting holes are formed in the center positions of the convex lugs. The U-shaped grooves are distributed on the inner diameter of the pressure plate, the U-shaped heat radiation through holes are distributed in the middleposition of the inner ring of the pressure plate, and the U-shaped heat radiation through holes and the U-shaped grooves are sequentially arranged at intervals. By means of the long reinforcing ribsand the short reinforcing ribs, the strength of the clutch pressure plate can be improved; by means of the heat radiation grooves and the heat radiation holes, the heat radiation performance of the clutch pressure plate can be improved; the power performance of the clutch pressure plate can be improved well through the rotating directions of the long reinforcing ribs, the short reinforcing ribs and the end faces of the pressure plate teeth; and thus, the clutch pressure plate has the advantages that rigidity is large, deformation is not prone to happening, the heat radiation efficiency is high, the heat radiation effect is good, the power transmission efficiency is high, high temperature resisting is achieved, smoothness is good, and the service life is long.

The invention discloses a pruning machine, wherein a steel wire flexible shaft (7), an upright rod (12), a switch top block (13), a main button (2), a lifting plate (8) and a microswitch (6) are arranged at the left of a motor component (5); a draw plate (10) and an auxiliary button (4) are arranged at the right of the motor component (5); two ends of the steel wire flexible shaft (7) are respectively connected with the right end of the main button (2) and the left end of the lifting plate (8); a rigid metal rod (9) is connected between the right end of the lifting plate (8) and the upper end of the draw plate (10); the lower ends of the draw plate (10) and the auxiliary button (3) are hinged with a shell (11) at the same time; the lifting plate (8) is slidably sheathed on the upright rod (12) sheathed by the switch top block (13); and the microswitch (6) is above the switch top block (13). The pruning machine disclosed by the invention has the advantages that a motor can be turned on and off with a relatively small force and thermal deformation of driving components caused by the heating of the motor can be prevented.