171results about How to "Increase coefficient of friction" patented technology

A syringe including a plunger rod assembly including a proximal portion a distal portion with a stopper for expelling fluids from the syringe and a breakable connection between the proximal portion and the distal portion is disclosed. An impulse reduction system, which may be an elastic element or braking surfaces, reduces the contact impulse imparted by the proximal portion upon the distal portion when the connection between the distal portion and proximal portion breaks is also disclosed.

Provided is a friction material composition, comprising a binder, fibrous base materials, an abrasive material, an inorganic filler, and an organic filler. The composition further contains a specific amount of zinc. The fibrous base materials include a specific amount of at least one fibrous base material selected from cellulose fibers and fire-resistant fibers and a specific amount of iron-based fibers as another fibrous base material. The composition contains 1 wt.% or less inorganic abrasive material having a Mohs hardness of 8 or higher and a particle diameter of 1 [mu]m or larger as the abrasive material. This friction material composition gives a brake pad for passenger cars which less attacks mating materials than conventional products, has a high coefficient of friction during braking when repeatedly used for braking in high-speed traveling, and can be inhibited from wearing or unevenly wearing. Also provided are a friction material and a friction member both obtained from the composition.

The invention relates to a seabed type conical investigating and drilling integrated machine which comprises a tower, a power head, a drilling tool storeroom, a manipulator mechanism, a leveling mechanism, an instrument box, a winch, a drilling tool, a clamp holder and a hydraulic pump. According to the drilling process of a seabed drilling machine, the power head provides the rotation power and realizes the feeding and recycling of the drilling tool through a tower guide rail on the tower; the drilling tool storeroom is arranged on the two sides of the power head and used for storing variousdrilling tools; the drilling tools are automatically stored and fetched through the manipulator mechanism, and the leveling mechanism keeps the drilling tool vertical to the seafloor when the integrated machine works; a core barrel for wire line coring is released and recycled by the winch; and the drilling tool is clamped and removed by the clamp holder. The integrated machine provided by the invention has a scientific and reasonable structure, is simple and convenient to control and safe and reliable to use and is suitable for the large-depth deep hole core sampling on seabed and also for operation on land.

The invention discloses a copper-based powder metallurgy antifriction material and a preparation method thereof. The material is prepared from the following raw materials in part by weight: 60 to 64 parts of copper powder, 6 to 10 parts of iron powder, 3 to 6 parts of carborundum powder, 3 to 6 parts of manganese sulfide powder, 4 to 7 parts of zirconium corundum powder, 10 to 14 parts of graphite powder, 1 to 4 parts of nickle powder, 2 to 5 parts of cobalt powder, 2 to 5 parts of alumina powder, 2 to 5 parts of feldspar powder and 1 to 4 parts of silica powder. The preparation method comprises the following steps of preparing and mixing the raw materials, pressing for forming, sintering and cooling. The copper-based powder metallurgy antifriction material prepared by the method is high in friction coefficient, can quickly absorb kinetic energy and brake, is high in transmission speed and low in abrasion, is high in strength, high temperature resistant and good in thermal conductivity, and is good in anti-seizure property, corrosion resistant, and slightly influenced by grease and damp.

This invention relates to installation methods for a multi-component floor mat. The floor mat typically contains a textile component and a base component. Alignment and deployment of the textile component with the base component in an efficient manner is described herein.

The invention relates to a screw connection structure and a damper structure. In the invention, elastic materials and pressure plates are arranged on the outside of the overlap section of plates for building structure, a pulling force is inducted into screws which run through the elastic materials, at least one nonferrous metal plate or composite ceramic plate is inserted into the plates for building structure, and at least the peripheral surface of the surface of the nonferrous metal plate or the composite ceramic plate caught between the steels is carried on waterproof processing. The invention also applies the screw connection structure in the damper structure. The invention can keep a friction coefficient stable by increasing the friction coefficient to save screws, and lower cost and simple structure are realized.

The invention relates to an abrasive disc for papermaking, which is applied to the beating technology in the paper production process. The abrasive disc for papermaking consists of the following raw materials in parts by weight: 15-50 parts of base material, 15-65 parts of fiber material and 16-65 parts of abrasion-proof material, wherein the particle size of the abrasion-proof material is 50-500 meshes; the base material, the fiber material and the abrasion-proof material have a wetting and splicing effect; and the base material has abrasion resistance and toughness. The abrasive disc provided by the invention has the advantages of reasonable formula design, light weight, low energy consumption, low manufacturing cost, controllable beating quality and stable quality.

The invention relates to a brake shoe for hump speed reducer and the method for preparing the same. Said brake shoe comprises brake shoe body, peripheral reinforcing material, and bottom reinforcing material. Said brake shoe body employs the composite material of mixed fiber reinforcing resin and packing high friction packing material; said peripheral reinforcing material takes fiber reinforcing resin material; and said bottom reinforcing material employs iron plate or fiber reinforcing resin material. The method comprises processes of preparaing raw material, attaching moudle and shaping. The invention is characterized compared with current technology by high friction coefficient, good mechanical property and weather resistance, and low noise.

A tool for gripping a tubular workpiece comprises: a land element for reacting compressive load against an end face of the workpiece; grip elements and grip element carrier means; a main body with means for converting axial motion of the tool relative to the workpiece into radial movement of the grip elements from a retracted position to an engaged position exerting radial load on the workpiece; and retractor means for retracting the grip elements from the workpiece the tool is displaced axially away from the workpiece. The grip element carrier means may comprise a cylindrical cage with the grip elements being radially slidable within circumferentially-spaced windows in the cage. The means for converting axial movement and load into radial movement and load may comprise a cone or ramp surface that bears against the grip elements such that radial loads from the grip surfaces are carried through the main body.

The invention relates to an anti-slip mat plate, which is characterized in that an anti-slip mat body is formed by spinning or weaving natural fibers or artificial fibers with good durability and tensile performance, and interior pores of the fibers are infiltrated with an adhesive material or the surfaces of the fibers are attached with the adhesive material. The anti-slip mat plate of the invention adopts a brand new anti-slip mechanism, and its friction coefficient can increase with the increase of a load, so that relative slippage between connected objects can be effectively prevented. Characterized by simple structure, large friction coefficient, convenient processing, and strong durability, etc., the anti-slip mat plate can be widely used in equipment fixation, well cover and well seat matching, and other places. Especially after a wear resistant and prick resistant layer is added to the anti-slip mat body or an elastic layer and a wear resistant and prick resistant layer are arranged simultaneously, the anti-slip mat plate is applicable to railway track bed structures and other building fields, and is especially suitable for anti-slip treatment of various engineering places with heavy loads or vibration.

A snowboard binding (1) including a base plate (2), arranged to receive the sole of the user's boot, and an element (5) for securing to the board located in the central part of the base plate, wherein the base plate (2) includes two plates (10, 11) for receiving the contact of the boot sole, these two plates (10, 11) partially overlapping and each having an adjustable longitudinal position, and wherein locking means (25) pass through the two plates (10, 11) in their overlap zones (14, 16) in order to anchor them in an element (5) for securing the base plate to the board.

The invention discloses a self-lubricating wear-resistant polyether-ether-ketone slip sheet and a formula and a preparation method thereof. The preparation method comprises the following steps: mixing 70-80 parts by weight of polyether-ether-ketone, 15-25 parts by weight of polytetrafluoroethylene, 2-4 parts by weight of MoS and 1-3 parts by weight of graphite, performing injection molding to form sheets which accord with the specifications, preserving the heat in a setting mold at the temperature of 230-260 DEG C for 2-4 hours, and finally grinding to obtain the wear-resistant slip sheet. The preparation method is simple in process and easy to operate, the preparation cost is reduced, and the slip sheet is applied to the field of compression and is wide in application and high in application value.

A bit holder, comprising a base having a plurality of longitudinally oriented bit compartments for releasably storing multiple tool bits, a retention member positioned on the outside of the base for releasably retaining the tool bits within the base, and a magnetic member engaged with the base for allowing the base to be removably attached to a metal surface for storage.

The present invention discloses a calcium carbonate whisker reinforced resin-rubber base friction material, and a preparation method therefor. The material comprises: 10-15 parts of liquid nitrile rubber-modified phenolic, 5-10 parts of styrene-butadiene rubber, 0-25 parts of calcium carbonate whisker, 10-20 parts of steel fiber, 0-8 parts of sepiolite fiber, 0-8 parts of mineral fiber, 0-3 parts of aramid fiber, 5-8 parts of barium sulfate, 5-10 parts of magnesium oxide, 2-3 parts of aluminum oxide, 5-10 parts of flake graphite, 1-5 parts of carbon black, 5-10 parts of petroleum coke, and 3-7 parts of friction powder. The preparation method of the calcium carbonate whisker reinforced resin-rubber base friction material comprises steps of such as material collocation, ban burying, crushing, pressing molding, immobilization processing, cooling, and packaging. Brake pads prepared by the invention, tested by an MM1000-III type friction and wear testing machine, have excellent friction and wear performance and stable braking performance, is safe and environmentally-friendly, and also has the advantages such as good stability of friction coefficient, low wear rate and high heat-resistant property.

A work feeding and conveying mechanism for a planing machine includes a conveying device having a conveying belt fitted around an intermediate base and actuated to rotate by a front shaft. The front shaft has one side secured with a driven gear connected with a transmission device, which has a gear set driven to rotate by a knife shaft assembled on an upper base. The gear set has its lower side fixed with a transmission shaft coupled with a transmission set positioned at the outer side of the intermediate base. The transmission set has one side extending outward and fixed with a transmission gear connected with the driven gear of the front shaft. The conveying device can be driven to rotate and smoothly convey a work piece with a comparatively large contact area, able to carry out wood planing process with precision.

The invention relates to a preparation method of a graphene modified friction material, and belongs to the technical field of friction materials. The method comprises the following steps: 1, dispersing 10-20 parts by weight of graphene oxide and 20-30 parts by weight of carbon powder in 160-200 parts of water, adding 15-30 parts of nano-Cu powder, 30-50 parts by weight of nano-Si powder and 5-10 parts by weight of MgO, and uniformly mixing; 2, carrying out ball milling on the mixture obtained in step 1, and drying to obtain a dried substance; and 3, compacting the dried substance to form a green body, and sintering the green body in a high temperature vacuum furnace to obtain the friction material. The friction material is modified by graphene and has good strength and friction coefficient.

A self-piercing rivet fastening device has a punch that drives legs of the rivet into portions of workpieces that are forced into a die cavity, in order to join the workpieces. Particular surfaces of the die cavity are modified to increase the coefficient of friction in order to prevent tips of the legs of the rivet from breaking through a workpiece adjacent to the die and forming holes.

The invention relates to protection devices for building construction and particularly relates to an environment protection device for building construction. A technical problem to be solved by the invention is to provide the environment protection device for building construction which is timesaving and laborsaving and is good in dust falling effect and wide in spraying range. In order to solve the above-mentioned technical problem, the environment protection device for building construction, provided by the invention, comprises a bottom plate and the like, wherein a moving device is arrangedon the bottom plate, supporting legs are mounted at the top of the bottom plate in bilateral symmetry in a bolted manner, a top plate is horizontally connected to the tops of the supporting legs in abolted manner and is provided with a water spraying device, a supporting rod is vertically connected to the middle of the top of the top plate in a bolted manner, and a water spraying component of the water spraying device is located at the top of the top plate. According to the environment protection device for building construction, provided by the invention, through sliding fit between a sleeve and the supporting rod, the vertical position of a sprayer can be very conveniently adjusted, and then, the range of water spraying of the sprayer is adjusted, so that the dust falling effect is better, and the effects of good dust falling effect and wide spraying range are achieved.

The new type of emergency brake for automobile consists of double side resistance plates with separately connected driving link rod, spring, casing, tension rod, bearing, pin shaft, resistance bolt or resistance pad, etc. After the automobile generator is opened, the resistance plates fall by means of their self weights, and the springs are drawn out from the casings to locate the resistance plates on ground before the back wheels. The emergency brake has short brake time and distance, great friction coefficient of vehicle to ground and high safety and reliability.

The invention discloses a powder-metallurgical automobile brake pad and a preparation method thereof. The powder-metallurgical automobile brake pad consists of the following raw materials: iron powder, copper powder, graphite, silicon carbide, quartz sand, nickel powder, tungsten carbide and molybdenum disulfide. The brake pad with excellent friction performance, ultrahigh wear resistance, high-temperature resistance and stable heat fade is manufactured by a series processing flows of reducing or drying the raw materials, mixing the raw materials, performing compression molding, performing sinter molding and machining in the later period, and is especially suitable for superior quality cars, sports cars and professional racing cars.

The invention discloses a friction material for a clutch driven disc and a preparation method of the friction material. The friction material is prepared from the following raw materials in percentage by mass: 14% of cashew nut shell oil modified phenol-formaldehyde resin, 7% of butyronitrile rubber powder, 4.6% to 12% of basalt fibers, 4.6% to 12% of steel fibers, 4.6% to 12% of potassium titanate whiskers, 21% of barium sulfate powder, 12% of graphite, 6% of vermiculite, 5% of aluminum powder, 7% of barite and 4% of brown alumina, wherein the total mass percent of all the ingredients is 100%. The method comprises the steps of weighing the materials according to the formula, then, carrying out uniform mixing, then, carrying out dry-process one-step hot briquetting, and carrying out heat treatment postprocessing, thereby preparing the friction material. The friction material has the characteristics of high-temperature resistance, wear resistance, impact resistance and good heat fade resistance; the preparation process is simple, the problems that similar friction materials are high in wear rate, unstable in coefficient of friction, relatively low in impact strength, and the like at high temperatures are effectively solved, and the performance requirements of enterprise production can be excellently met.

A portable strawberry picking device comprises a bottom plate, a spring, grouping tools, an inserting groove handle and a buffer material pad. A guide structure is arranged on the upper half portion of the bottom plate; a semicircular guide barrel is welded to the lower half portion of the bottom plate; the spring is mounted in the semicircular guide barrel and connected with the inserting groovehandle. The grouping tools are inserted into a vertical groove of the inserting groove handle. The guide structure is a comb-shaped guide structure and can achieve the function of guiding and dredgingstrawberry straw into comb tooth intervals. The spring is used for achieving the automatic resetting function of the inserting groove handle. The three groups of grouping tools are controlled by theinserting groove handle, and can achieve overall translation shearing, and achieve one-time batch picking. The buffering material pad is a low-density polyethylene air bubble film, and can protect strawberries. The economic cost can be greatly reduced, and meanwhile the portable strawberry picking device has the advantages of being capable of picking the strawberries in a batch mode and protectingthe strawberries.

The invention discloses an iron-based composite structure high-temperature anti-corrosion and anti-skid coating and a preparation method thereof. The coating comprises a SAM2X5 amorphous alloy anti-corrosion bottom layer (2) and an iron-based amorphous alloy/ceramic anti-skid top layer (1). The iron-based amorphous alloy/ceramic anti-skid top layer (1) is composed of alloy powder and ceramic powder. The alloy powder is prepared from, by mass percent, 31wt% of iron, 28wt% of chromium, 12wt% of boron, 11wt% of cobalt, 10wt% of nickel and 8wt% of silicon. The mass of the ceramic powder is 10%-70%of the total mass of the iron-based amorphous alloy/ceramic anti-skid top layer (1). The coating is high in friction coefficient, coating bonding strength and corrosion resistance.

The invention relates to a cleaning method used in an amorphous carbon deposition process. The cleaning method comprises a process step S1 of pre-cleaning a plasma chamber body under a plasma condition and a process step S2 of depositing an environment protecting film on the plasma chamber body; the step S2 particularly comprises the steps of introducing gas containing C2H2, Ar and He into the plasma chamber body, depositing a layer of non-N-doped amorphous carbon film having a first thickness on the plasma chamber body wall, then introducing gas containing C2H2 and N2 into the plasma chamber body, again growing a layer of N-doped amorphous carbon film having a second thickness on the non-N-doped amorphous carbon film, wherein the second thickness is less than the first thickness. Therefore, the problems of wafer backside aluminum pollution and caused easy migration of a wafer position are avoided.

The invention relates to an asphalt pavement construction technique, in particular to a construction technique of OGFC on airport expressway. The technique at least comprises the steps of: 1) preparing materials; 2) pre-heating part of the materials; 3) mixing the materials according to certain proportion; 4) paving the mixed materials; and 5) carrying out roller compacting for formation. In the materials, asphalt accounts for 4.8%, 11-16 gravel in the aggregate accounts for 44.7%, 7-11 gravel in the aggregate accounts for 25.7%, 4-7 gravel in the aggregate accounts for 7.6%, 0-4 machined-prepared sand accounts for 12.4%, mineral powder accounts for 3.3%, slaked lime accounts for 1.4%, and fiber accounts for 0.1%. Proportion error of each component in the materials can be 3-7%. The asphalt adopts Shell 90# substrate asphalt. The ratio of modifier TPS is: TPS:substrate asphalt equals to 12:88. The fiber adopts polyester fiber with the length being 6mm. The invention provides a construction technique of OGFC on airport expressway with simple technique, convenient construction and lower cost.

A winding bobbin chuck on a spinning machine includes a disc-shaped chuck made of plastics, a central hole positioned in the center of the chuck, a contact end face on the chuck which contacts with the end face of the bobbin, a column-shaped bench on the contact end face and capable of matching the inner circle of the bobbin; the outer surface of the column-shaped bench is coated with a metal layer; the metal layer forms an uneven transmission system form the outer circumference surface of the column-shaped bench; large friction driving force can be produced between the transmission system and the bobbin, so that the bobbin runs more stably, and the metal layer is wear resistant, so that the winding bobbin chuck on the spinning machine has quite long service life.

The invention relates to an anti-skidding gasket for installing an auxiliary frame and an automobile comprising the anti-skidding gasket, and further relates to an auxiliary frame installation method utilizing the anti-skidding gasket. A main body of the anti-skidding gasket is made by a round rigid plate, a through hole is formed in the middle of the plate, a fastening piece penetrates through the through hole to fasten the anti-skidding gasket between the auxiliary frame and an automobile body, buckles for pre-positioning the anti-skidding gasket on the auxiliary frame are arranged on the peripheral edge of the anti-skidding gasket, projections of which the positions are corresponding are arranged on the two sides of the anti-skidding gasket, and the shapes of the both projections form part of a sphere. The anti-skidding gasket is adopted for installing the auxiliary frame of the automobile, so that the vibration and the noise of the connection parts of the bodies and the auxiliary frames of low and medium-grade automobiles in a running process can be obviously reduced; and moreover, cost is low, and the working strength of assembling personnel cannot be increased.

The invention discloses a manufacturing process of a car carpet. The process comprises the following steps: (a). selecting a required chemical synthetic fiber material; (b). evenly mixing the fiber material with a water repellent; (c). spreading the fiber material on a net and machining, and weaving the fiber material into a nonwoven fabric by a needle punching process; and (d). forming a singed layer on a surface of the nonwoven fabric by a singeing process. The chemical synthetic fiber material can be terylene, polypropylene fiber or polyamide fiber. Rough punctuated or angular crystals are formed on the surface of the fabric by the singeing process, thus improving roughness and frictional coefficient and enhancing antiskid property; the chemical synthetic fiber material is mixed with the water repellent, thus water can not infiltrate into the carpet and just rolls on the surface and the antiskid property is greatly improved.

The invention discloses an anvil. The upper part inclined plane of the anvil is electroplated with a plating layer. A metal plating layer is electroplated on an inclined plane which forms a sealing edge between the anvils to increase the friction coefficient of the anvil and enhance the interaction between the anvil inclined planes, so the sealing effect is good, the high-temperature and high-pressure energy in a synthetic cavity can be effectively sealed and remained, and the smooth synthesis conversion process is ensured. The plating layer is an alloy layer formed by mixing and electroplating tungsten powder and cobalt powder, wherein the granularity of the tungsten powder and the cobalt powder is 0.3 micron, so the plating layer has the advantages of durability, abrasion resistance,, high melting point, high-temperature resistance, long service life and low cost. The anvil is additionally provided with the plating layer, so the friction force is greatly enhanced, safe pressure relief is ensured, the bubbling probability is reduced, and the anvil is safe and reliable.

The invention relates to a friction plate, in particular to a wet brake friction plate and a manufacturing method thereof. The wet brake friction plate is manufacturing from the following raw materials: 35-38 parts of cotton pulp, 8-10 parts of carbon fiber, 13-15 parts of aramid fiber, 20-25 parts of graphite, 6-8 parts of sepiolite, 6-8 parts of friction powder, 10-15 parts of iron oxide red, 5-8 parts of iron oxide yellow, 4-5 parts of latex, 8-10 parts of feldspar, 0.5-1 part of raw alkali and 0.06-0.08 part of sulfur. The manufacturing method comprises the following steps of: material proportioning -> pulping -> papermaking -> paper drying -> paper cutting -> gum dipping -> secondary paper drying -> paper curing -> chip plate treatment -> pasting -> friction plate curing -> subsequent friction plate processing -> cleaning and packaging. According to the wet brake friction plate and the manufacturing method thereof, the friction coefficient is increased, and the service life is prolonged.