678 results about "Impact testing" patented technology

The present invention is directed generally to cloth-like fiber reinforced polypropylene compositions, and the beneficial mechanical and aesthetic properties imparted by such compositions. The cloth-like fiber reinforced polypropylene compositions include at least 25 wt % polypropylene based polymer, from 5 to 60 wt % organic reinforcing fiber, from 0 to 60 wt % inorganic filler, and from 0.1 to 2.5 wt % colorant fiber. A method of making fiber reinforced polypropylene compositions and molding articles there from is also disclosed and includes the steps of twin screw extrusion compounding the composition to form a resin and injection molding the resin to form a cloth-like article. Articles molded from these fiber reinforced polypropylene compositions have a flexural modulus of at least 300,000 psi, exhibit ductility during instrumented impact testing, and exhibit a cloth-like appearance. The cloth-like fiber reinforced polypropylene compositions of the present invention are particularly suitable for making molded articles including, but not limited to household appliances, automotive parts, and boat hulls.

A bone substitute for use in impact testing of a structure simulating the human body which includes a member fabricated from epoxy resin and having a lengthwise dimension, and a fiberglass sheath embedded in an outer circumferential portion of the member, the sheath having glass fibers oriented along the length of the member.

The present invention is directed generally to processes for making fiber reinforced polypropylene resins including at least 25 wt % polypropylene based polymer, from 5 to 60 wt % organic fiber, and from 0 to 60 wt % inorganic filler. The process includes extrusion compounding the polypropylene based polymer, the organic fiber, and the inorganic filler to form a fiber reinforced polypropylene resin, which is subsequently molded to form an article with a flexural modulus of at least 300,000 psi, that exhibits ductility during instrumented impact testing (15 mph, −29° C., 25 lbs). Twin screw extruder compounding processes where the organic fiber is continuously fed to the extruder hopper by unwinding from one or more spools, and uniformly dispersed in the fiber reinforced polypropylene resin by twin screws having a combination of conveying and kneading elements are also disclosed.

Blocky chlorinated polyolefins are disclosed as compatibilizers of PVC and / or CPVC resins with polyolefin elastomers. The blocky chlorinated polyolefins facilitate the dispersion of the elastomers as a dispersed phase with the proper size for impact modification of the PVC and / or CPVC. The blocky chlorinated polyolefin provides better adhesion between the elastomer and the PVC and / or CPVC providing better physical properties such as impact strength as measured by Notched Izod and variable height impact testing (VHIT) than did the randomly chlorinated polyolefins, often used as processing aids and as impact modifiers in PVC or CPVC. The differences in properties achieved with blocky chlorinated polyolefins versus randomly chlorinated polyolefins are attributed to the individual blocks of the blocky polyolefin being compatible (and / or co-crystalizable) with either the polyolefin elastomer or the PVC / CPVC resulting in better adhesion between phases. Also disclosed is a process for making optimal blocky chlorinated polyolefins.

The invention discloses a multi-angle drop-hammer impact testing device. The multi-angle drop-hammer impact testing device comprises a test bench for fixing a test specimen, a drop-hammer assembly and a lifting mechanism, wherein the drop-hammer assembly is correspondingly arranged above the test bench by the lifting mechanism; the test bench comprises a test bench main body and an angle adjustment mechanism for adjusting the rotation of the test bench main body, and the drop-hammer assembly is kept to correspond to the test specimen on the test bench main body by a hammer adjustment mechanism. The invention also discloses the test bench of the multi-angle drop-hammer impact testing device using the structure. The test bench main body rotates by a preset angle by the angle adjustment mechanism, so as to simulate the impacts from different angles; the drop-hammer assembly is allowed to impact the test specimen from different angles, and the impacts comprise front-surface impact, the offset impact and the lateral impact, so that the material mechanical properties of the test specimen can be analyzed from different impact angles, and the flexibility and universality of the drop-hammer impact test are greatly improved.

The present invention is directed to an in-line compounding and molding process for making fiber reinforced polypropylene composite parts and articles that exhibit beneficial mechanical and aesthetic properties imparted by such process and compositions. The in-line compounding and molding process includes the steps of providing an in-line compounding and molding machine comprising a twin screw extruder fluidly coupled to an injection molder; extrusion compounding in the twin screw extruder a composition comprising at least 30 wt % polypropylene, from 10 to 60 wt % organic fiber, from 0 to 40 wt % inorganic filler, and from 0 to 0.1 wt % lubricant to form a melt extrudate; conveying the melt extrudate to the injection molder; and molding the melt extrudate in the injection molder to form a part or article. Fiber reinforced polypropylene articles formed from the in-line compounding and molding process have flexural modulus of at least 300,000 psi and exhibit ductility during instrumented impact testing. Fiber reinforced polypropylene articles formed from the process of the present invention are particularly suitable for making household appliances, automotive parts, and boat hulls.

The invention provides an impact testing apparatus, comprising a testing platform, a sample supporting seat, an elevating gear, a measuring device and a control device, wherein the sample supporting seat is arranged on the testing platform; an impact assembly comprises an impact hammerhead which is arranged to be opposite to the sample supporting seat; the elevating gear comprises an elevating rack, an adsorption unit and an elevation driving mechanism; the measuring device comprises a first force transducer, a second force transducer and a displacement sensor; the first force transducer is arranged on the upper end of the impact hammerhead; the second force transducer is arranged on the bottom end of the sample supporting seat; the displacement sensor is mounted on the testing platform; and the control device is electrically connected with the elevation driving mechanism, the first force transducer, the second force transducer and the displacement sensor, separately. The impact testing apparatus can carry out impact tests on metal cellular materials; and the impact testing apparatus is capable of accomplishing other drop-hammer type impact tests by only changing a support clamp and the impact hammerhead and can record related data in testing process.

The present invention is directed generally to processes for making fiber reinforced polypropylene resins including at least 25 wt% polypropylene based polymer, from 5 to 60 wt% organic fiber, and from 0 to 60 wt% inorganic filler. The process includes extrusion compounding the polypropylene based polymer, the organic fiber, and the inorganic filler to form a fiber reinforced polypropylene resin, which is subsequently molded to form an article with a flexural modulus of at least 300,000 psi, that exhibits ductility during instrumented impact testing (15 mph, -29 DEG C, 25 lbs). Twin screw extruder compounding processes where the organic fiber is continuously fed to the extruder hopper by unwinding from one or more spools, and uniformly dispersed in the fiber reinforced polypropylene resin by twin screws having a combination of conveying and kneading elements are also disclosed.

The invention provides an impact testing machine. The impact testing machine comprises a cylindrical pellet support, a gun barrel used for launching the pellet support and a pellet support recoverer, wherein the inner wall of the gun barrel is in clearance fit with the lateral side of the cylindrical pellet support, and the pellet support recoverer is arranged on an outlet of the gun barrel and is used for separating the pellet support and a pellet and guaranteeing smooth pass of the pellet when the pellet support and the pellet pass. When the pellet support is located in the gun barrel, the end, facing the outlet of the gun barrel, of the pellet support is used for placing the pellet. Because the pellet support is used for launching the pellet, a good pellet acceleration effect can be achieved; when the pellet and the pellet support integrally pass through the pellet support recoverer, the pellet support is recovered, the pellet continues to be used for an impact test without being affected, and accordingly pellets of all kinds of shapes and specifications can be conveniently used for the impact test.

The invention discloses a drop hammer impact testing machine, which comprises an iron block, a drop hanger, a wire cable, a grapnel device and a rail holding device. The invention is characterized in that a beam, an upright post, a cross arm and a support are fixed to form a frame of the impact testing machine via screw bolts; a pulley is mounted on the beam and below the upright post; one end of the wire cable is arranged on the beam, and the other end thereof is connected with a power unit through the drop hanger and the pulley; the drop hanger is provided with a drop hanger device for catching and releasing an impact hammer; the rail holding device is fixed in the middle position below the upright post. By using the invention, automatically catching the hammer and automatically decoupling can be realized while the rail cannot change position to finish repeated impact tests, thus saving testing times, reducing labor strength and improving work efficiency greatly.

A system and method for environmental testing and evaluation of non-destructive inspection (NDI) sensors is provided. The system has a structure having a plurality of NDI sensors to be tested. The system further has an environmental chamber containing heating elements and cooling elements for heating and cooling the NDI sensors when the structure is secured to the environmental chamber. The system further has an impact testing assembly positioned over the structure for impacting the structure. The system further has a data acquisition computer subsystem coupled to the environmental chamber and coupled to the NDI sensors. The data acquisition computer subsystem controls and monitors the heating and cooling elements, and collects and processes temperature and impact data acquired by the NDI sensors.

A vehicle impact testing device is provided with a towing device for running a test car along a running road surface to collide with a barrier. The towing device is movably suspended from a pair of guide rails received in a recess formed below the running road surface. The towing device is disposed between the guide rails, thereby making effective use of the space between the guide rails. Further, the towing device is disposed at a position below the running road surface, so that it does not interfere with the running of the test car.

The invention discloses a two-box type impact testing box. A hanging basket between a high-temperature box and a low-temperature box is moved to transfer a test sample and a room-temperature box does not need to be arranged, so that the defrosting time can be shortened, the consumption of electric quantity is reduced and the testing cost is saved; inner walls of the high-temperature box and the low-temperature box are respectively provided with a heating device and a refrigerating device; the circulation of air flow is driven by an impeller; the air flow rapidly and circularly flows to realize the effect of rapidly heating the test sample or refrigerating the test sample; an impeller, one heating device, an evaporator, a regenerator and the like are all located on the side wall of the high-temperature box or the low-temperature box; a motor drives the impeller to rotate to drive the air flow to flow in the front and rear direction of the box body; the air flow can rapidly flow and the distribution of the air flow is uniform so as to reduce the formation of frost and realize a long-time defrosting-operation-free circulating continuous test; a driving device for moving the hanging basket is arranged in a refrigerator cabinet rather than in the low-temperature box, so as to avoid influences on the driving device by the low temperature and rapidly move the hanging basket; the safety is high.

An impact testing device used for testing impact resistance of electronic devices is provided. The impact testing device includes a supporting assembly for supporting the electronic device, a falling assembly for an impact head to fall through to hit the testing points of the electronic device on the supporting assembly, and a controller box, electrically connected to the supporting assembly. The controller box controls the supporting assembly to adjust the positions of the electronic device for the impact head to hit different testing points of the electronic device.

A hydraulic control system of a multifunctional hydraulic testing stand comprises a hydraulic oil source module, a high-flow unloading impact simulation and test module, a hydraulic cylinder impact test and buffer performance test module, a proportional component test module, an oil cylinder test and simulation loading module and a pressure oil source output module. In this way, a module is connected with a test oil cylinder and a loading oil cylinder through a component, and corresponding tests are completed. By the adoption of the hydraulic control system, a clean oil source meeting the requirement of the proportional servo component test can be provided, the output pressure and flow are stable and adjustable, the functions of hydraulic impact testing, high-flow unloading impact testing, buffer performance testing, proportional component testing, proportional servo oil cylinder testing, simulation loading and pressure oil source output are integrated through the system, the integration degree is high, and the application range is wide.

The invention discloses a grounding simulation testing device and a grounding simulation testing method. The grounding simulation testing device consists of a transparent container, a transparent liquid medium and an equivalently-contracted grounding device model. The method comprises the following steps of: simulating the variation of earth resistivity by adjusting the resistivity of the liquid medium in the transparent container; simulating non-uniform distribution of soil resistivity by arranging a horizontal or vertical insulated spacer layer in the transparent container; simulating grounding devices of different types by changing the shape of the grounding device model; simulating different grounding device types or the dispersion processes and dispersion mechanisms of different soil structures flowing through working frequency, direct-current and lightning impulse current by arranging working frequency, direct-current and impact testing power supplies; embedding a sampling sensor; measuring needed testing parameters; and recording a testing process through a video camera. The grounding simulation testing device and the method have the advantages of simple and compact structure, easiness in operating and high equivalence.

The invention discloses a method of testing stability of an Ethernet exchanger, including: 1, connecting all the ports of a sample machine to a flux generator; 2, setting port mode as self-adapting, closing flow control function, to make all the ports in a default state; 3, setting port speed of the generator as line speed and frame length random; also including: at least one of full-load testing, flux impact testing, sustained operation testing, limit testing and environmental stress testing, combined in arbitrary sequence to completely test stability of the Ethernet exchanger. Compared with existing techniques, it has broad covering area, high efficiency, remarkable effect and high resources utilization, achieves testing purpose, saves testing time and expenses, and enhance success rate of testing, and avoids heavy losses of users and product suppliers.

The invention relates to a testing machine for chairs, cabinets, tables, beds and screens. The testing machine comprises a frame assembly, a plurality of moving crossbeam assemblies, moving vertical beam assemblies, horizontal electric cylinder assemblies and a control cabinet, wherein the moving crossbeam assemblies, the moving vertical beam assemblies and the horizontal electric cylinder assemblies are all connected with the frame assembly, and the control cabinet is connected with the moving crossbeam assemblies, the moving vertical beam assemblies and the horizontal electric cylinder assemblies. The testing matching integrates test items of furniture mechanical properties of chair, table and bed impact, cabinet, table and bed load, cabinet and table screen stability and the like, can be assembled and mounted optionally according to requirements, and is flexible to operate; integration level of equipment is increased greatly, a stepping motor and electric cylinders are introduced into the testing machine, a PLC (programmable logic controller) is used for control, automation level of the equipment is increased, accurate control of force loading and displacement is achieved, and the problems of single test item or low integration level, low automation level and inaccuracy of force loading and displacement control of existing furniture test equipment are solved.

The invention discloses an impact testing machine for a ceramic pendulum bob. The impact testing machine comprises a supporting frame, a circular-arc-shaped dial, a fixed releasing device, a pendulum bob and a clamp for fixing a sample to be detected, wherein the circular-arc-shaped dial is fixedly connected to the supporting frame; the circular-arc-shaped dial is provided with a circular-arc-shaped rail on which the fixed releasing device moves; the circular-arc-shaped rail and the circular-arc-shaped dial are concentric circles; the pendulum bob comprises an oscillating arm and a bob body; one end of the oscillating arm is fixedly connected with the bob body and the other end of the oscillating arm is fixedly connected to the circle center position of the circular-arc-shaped dial; the length of the oscillating arm is adapted to the radius of the circular-arc-shaped rail. According to the device, the disadvantages in the prior art are overcome; the precision adjustable height is realized by the dial; the impact testing machine can electrically lift up and down to determine an impact point; an electromagnet is used for releasing the pendulum bob and the clamp is convenient and firm, so that a test with small errors and high accuracy is realized and the working efficiency is improved effectively.

The invention discloses an electronic control type aimable bird shot impact testing device and belongs to the technical field of aeronautical facilities. The electronic control type aimable bird shot impact testing device comprises an air storage tank, an electronic control valve, a sighting device, a bird shot filling and launching compartment, a bird shot launching tube, bird shot supporting rods, a bird shot inlet, a sliding valve groove, a bird shot inlet sliding valve and a bird bolt casing stripping device, wherein the inlet of the bird shot launching tube is connected with the bird shot filling and launching compartment, the bird shot supporting rods are arranged in the bird shot filling and launching compartment evenly, the bird shot inlet and the sliding valve groove are formed in the same lateral wall of the bird shot filling and launching compartment, and the bird bolt casing stripping device is fixedly connected with the outlet of the bird shot launching tube. By means of the electronic control type aimable bird shot impact testing device, impact force is applied on bird shots by controlling high-pressure air, and therefore, the bird shots fly to a target quickly to achieve bird shot impact effect. The electronic control type aimable bird shot impact testing device is simple, parts are purchased or manufactured easily, the whole electronic control type aimable bird shot impact testing device can be implemented easily, and cost is low.

A micro-impact testing apparatus for measuring the impact characteristics of a microelectronics specimen exposed to an impact thereon. The apparatus comprises of a specimen holder for receiving a specimen to be tested, and an impact device. The impact device comprises of an impact head, a support member, at least one connecting element and a first flexural spring. The support member is connected to the connecting element in that the first flexural spring is firmly attached with its one end to the support member and with its other end to the connecting element. A second flexural spring, being at least substantially identical to said first flexural spring, is firmly attached with its one end to the connecting element and with its other end to the impact head so that the ends of the first and second flexural springs define, in an unloaded state of the flexural springs, a rectangle. The impact head is moveable transversally with respect to the first and second flexural springs along a linear line between a spring-loaded position and an impact position thereof. The specimen holder is aligned with the impact device such that the specimen is arranged in said impact position of the impact head so that the impact head is capable of impacting on the specimen after traveling from its loaded position towards its impact position along said linear line upon release thereof from said loaded position.

The invention relates to a portable high-precision drop hammer impact testing machine comprising a falling weight impact assembly, a photoelectric speed measuring system, a guide rail-sliding block system, an anti-secondary impact device, a lifting releasing device and a support frame. The falling weight impact assembly is connected with the support frame by the guide rail-sliding block system; the photoelectric speed measuring system is connected with the falling weight impact assembly and the support frame; the anti-secondary impact device is fixed at the bottom of the support frame; and thelifting releasing device is arranged at the support frame. Compared with the prior art, the portable high-precision drop hammer impact testing machine has the following advantages: the overall structure is simple; the machine is convenient to assemble and move; the impact force, the impact speed and the rebound speed can be synchronously measured in real time; the drop hammer falls along the guide rail; the guiding precision is high; the impact point position is accurate; the testing machine is suitable for the low-speed impact tests of various large engineering structures; and the impact process can be studied and analyzed further by force, impact speed, and rebound speed collection.

The invention discloses a falling weight impact testing machine which comprises a rack, a lifting mechanism, an impact counter weight and a load-bearing mechanism, wherein the lifting mechanism comprises a positioning pulley arranged above the load-bearing mechanism and connected with a cable between a cable disc and the impact counter weight, and a cable adjustment mechanism; the cable adjustment mechanism comprises an air cylinder and a movable pulley; the air cylinder is fixed on the rack; and the movable pulley is connected with a piston rod of the air cylinder, and is connected with the cable between the cable disc and the positioning pulley. The falling weight impact testing machine can achieve that a release rate of the cable can be greater than a free falling motion rate of the counter weight, so that a falling weight impact test can be performed without separating the impact counter weight from the cable; the manpower is saved; and the working efficiency is improved.

A method and apparatus wherein a material or object to be tested is placed on a base support. A stopper assembly having a stopper tip on one end in contact with the test material or object, and a washer on the opposite end attached to a rod. A projectile is propelled with a selected level of force along the rod and impacts the washer, which transmits the force of impact through the stopper tip to the test material or object. The level of propelling force, the mass of the projectile, the construction of the stopper assembly and the location of impact on the test material or object may be precisely adjusted to simulate real-life impacts.

A remote-controlled dynamoelectric machine inspection vehicle that can fit and travel within a narrow air gap between a stator and rotor of a dynamoelectric machine. The inspection vehicle has an effectuator that can remotely activate a hammer driven by a high pressure pneumatic three-stage miniature piston that propels the hammer against a stator slot wedge creating an impact force that causes the wedge to vibrate. The vibrations are sensed to determine the tightness of the wedge.

The invention discloses a drop hammer type low-speed impact testbed and relates to the technical field of drop hamper impact testing devices. The drop hammer type low-speed impact testbed comprises atestbed body for fixing test pieces, a drop hammer assembly, an angle adjusting mechanism and a temperature adjusting mechanism, wherein the testbed body comprises a lift hammer horizontal beam, a limiter, an impact bottom plate, a hydraulic oil trimmer pressure adjustable air cylinder damper, a plurality of various detachable impact hole test piece clamp plates and a vertical rod; the drop hammerassembly comprises a pulley, a drop hammer steel beam, a direct-current sucker type electromagnet, a balance weight block and a drop hammer; the angle adjusting mechanism comprises a vertical bearingpolish rod seat and a planar corner angle scale; the temperature adjusting mechanism comprises two digital-display temperature-control electric heating plate, a handle, a cover plate and a digital-display controller. By means of the structure, the drop hammer type low-speed impact testbed disclosed by the invention can well simulate impact tests of composite materials at different angles and different temperatures. Mechanical properties of materials of the test pieces are analyzed, so that flexibility and universality of drop hammer impact tests are greatly improved.