34results about How to "Guaranteed effective length" patented technology

The invention belongs to the technical field of a high polymer material and discloses a hydrolysis resistant continuous carbon fiber reinforced nylon 6 material and a preparation method thereof. The material disclosed by the invention comprises the following components in percentage by weight: 500-700 parts of nylon 6, 300-500 parts of continuous carbon fiber, 6-10 parts of oxidation inhibitor, 4-8 parts of lubricating agent and 5-15 parts of hydrolysis resistant agent. The invention also discloses the preparation method of the hydrolysis resistant continuous carbon fiber reinforced nylon 6 material. Compared with the prior art, the preparation method is reasonable in design, simple in operation and strong in practicability and adopts the continuous carbon fiber reinforced nylon 6 material so that the length of carbon fibers in a workpiece can be remained at 3-6mm, thereby the rigidity and the strength of the material are increased, the shock resistance and heat resistance of the material are obviously improved, and the material has long-term hydrolysis resistant stability and anti-chemical corrosion performance.

The invention falls into the technical field of polymer material, and relates to nylon 6 / polypropylene composite material and a preparation method thereof. The composite material comprises (by weight parts) nylon 6 500-600, polypropylene 50-100, continuous filament reinforcement 300-400, a compatilizer 40-50, an antioxidant 10-20 and a lubricant 2-6. Compared with prior art, the inventive product ensures the effective length of glass fibers, and as a result, the rigidity and the strength of the material are improved greatly, and the hydrolysis resistance and the heat resistance of the material are improved remarkably at the same time, with the fibers of the material being dispersed uniformly and the weight of the product being stable. In addition, the inventive material can be injection-molded directly with high production efficiency, and the product can be recycled by crushing after the product is used.

The invention falls into the technical field of polymer material, and discloses Nylon 66 material and a preparation method thereof. The material comprises (by weight parts) Nylon 66 raw material 500-700, continuous carbon fibers 300-500, an antioxidant 6-10, a lubricant 4-8 and an anti-hydrolysis agent 5-15. Compared with prior art, the invention has reasonable design, simple operation and strong practicability; the adoption of continuous carbon fibers for reinforcing the Nylon 66 material results in that the length of carbon fibers in products can be kept at 3-6 mm, and as a result, the rigidity and the strength of the material are improved greatly, the impact resistance and the heat resistance of the material are improved remarkably, and the material possesses a long-term hydrolytic stability and a resistance to chemical corrosion.

The invention discloses a folding bicycle, comprising a front wheel, a front fork, a folding handlebar, a frame, a rear wheel, a rear fork, a front chain wheel, a rear chain wheel and a chain, wherein, the frame mainly comprises a crossbeam and a medium tube; a seat tube and the medium tube are in extension-type connection; the rear fork is hinged with the medium tube through a rotary connection structure; the hinged shaft of the rear fork is positioned between the medium tube and the rear wheel parallel to the ground; when the rear wheel is folded inwards along the hinged shaft to achieve a folding state, the seat tube is inserted downwards to the lower part of the seat tube at the position of contacting with the rear wheel; chain dropping resisting structures are respectively arranged on the positions corresponding to the front chain wheel and the rear chain wheel; and the front upper part of the rear fork is against the frame when the folding bicycle is in an unfolding state. The folding bicycle of the invention has smaller bicycle body when being folded, and is convenient for carrying and placing.

The invention provides a main and auxiliary combined medical stretcher, which is composed of a main stretcher and an auxiliary stretcher, the main stretcher and the auxiliary stretcher are connected flexibly, the main stretcher is rectangular, and includes a main stretcher beam, a main stretcher longitudinal beam, a stretcher vertical beam and rollers , the main stretcher beam is arranged horizontally on the main stretcher longitudinal beam, the main stretcher beam and the main stretcher longitudinal beam are connected together to form a stretcher frame, and at least three stretcher vertical beams supporting the entire stretcher frame are arranged on the main stretcher longitudinal beam, The end of the beam contacting the ground is provided with rollers, and on the main stretcher beam at one end of the main stretcher along the longitudinal axis of the main stretcher, there is an extension part that can rotate around the main stretcher beam and expand and contract along the longitudinal axis of the main stretcher, which conforms to the requirements of the elevator car. The change in size ensures that the effective length of the medical stretcher meets the needs of patients of different heights, and achieves the purpose of carrying the medical stretcher in the elevator to achieve emergency rescue. The patient can move with the auxiliary stretcher and transfer to the ambulance to avoid moving the patient. , saving precious rescue time.

The invention discloses a weather-proof and hydrolysis-resistant continuous glass fiber reinforced polyamide composite material, which is prepared from the following components by weight: 400-560 parts of PA66, 100-140 parts of PA6, 300-500 parts of continuous glass fiber, 6-10 parts of an antioxidant, 1-6 parts of a composite anti-hydrolysis agent, 2-5 parts of a composite light stabilizer, 4-8 parts of a lubricant, and 5-15 parts of a carbon black masterbatch. The weather-proof and hydrolysis-resistant continuous glass fiber reinforced polyamide composite material provided in the invention has excellent weatherability and good hydrolysis resistance, and at the same time has excellent rigidity and impact toughness. An injection molding piece made of the composite material has a good surface appearance. Besides, the material can be directly shaped through injection molding, the production efficiency is high, and the used piece can be recycled after smashing.

The invention provides a foundation pit supporting structure of a drag tube well room and a construction method thereof. The foundation pit support structure includes: two groups of cement mixing pile assemblies provided with several rows of cement mixing piles; wherein, the two groups of cement mixing pile assemblies are respectively arranged along the width direction of the two side walls on which the drag pipe pipes are arranged on the foundation pit , the pulling pipe pipeline passes through the cement mixing pile assembly, and the cement mixing pile assembly is used to form the pile body to solidify the soft sand; between the two groups of cement mixing pile assemblies along the circumference of the foundation pit, except for the position of the pulling pipe pipe, there are several Larsen steel sheet piles, and a closed support structure is formed between the Larsen steel sheet piles and the cement mixing pile assemblies. The invention forms a fully enclosed and stable closed support structure, forms the soil at the two ports of the drag pipe of the foundation pit and forms a stable and closed support structure, makes the foundation pit form a water-blocking closed space, and effectively blocks water , reduce the risk of foundation pit collapse and road subgrade being hollowed out, and avoid the danger of collapse.

The invention discloses a method for cultivating artificial quartz crystal seed crystals with low corrosion tunnel density. Crystal blocks; high-quality quartz raw materials are broken into blocks, washed with water, alkali washed, diluted with water, dried, and put into the dissolution zone at the lower part of the autoclave; On the side and bottom, the opening of the U-shaped groove hangs downwards on the crystal growth rack, and the crystal growth rack is placed in the upper growth area of ​​the autoclave; the U-shaped groove is filled to form a complete shape of the artificial quartz crystal. After the growth is stopped, the seeds are removed The original U-shaped part of the crystal is extracted, and the newly filled part of the quartz crystal in the U-shaped groove is extracted to obtain an artificial quartz crystal seed crystal with a low corrosion tunnel density. The invention can solve the seed crystal requirement for the growth of artificial quartz crystal with low corrosion tunnel density, and meet the miniaturization and high-frequency QMEMS manufacturing process application of the crystal oscillator element.

The invention discloses an anti-leakage orientation method for anchoring agents. After anchoring holes are constructed, the anchoring agents are inserted into anchoring agent installation components,the anchoring agent installation components include anchoring agent installation cylinders and anti-leakage blades, the anti-leakage blades are distributed in the outer walls of the anchoring agent installation cylinders, the interiors of the anchoring agent installation cylinders are divided into two upper and lower anchoring agent installation holes by partitioning pieces, and the anchoring agents are inserted into the anchoring agent installation holes; the anchoring agents are installed, an anchor rod is inserted into the lowest anchoring agent installation hole, and the anchor rod and theanchoring agents are integrally pushed to the bottoms of the anchoring holes; the anchor rod is rotated to break the partitioning pieces, so that the anchoring agents are stirred, gaps between the anchor rod (cable) and the inner walls of the anchoring agent installation holes are filled with the broken anchoring agents, an oriented blade can ensure that multi-volume anchoring agents are alignedwith the anchoring holes to prevent the outflow of the anchoring agents in each protection segment, and a relatively closed chamber is formed between the adjacent two anchoring agent installation components, so that the closed chamber is evenly filled with the anchoring agent.

The invention discloses a lithium battery shell flame-retardant material based on long glass fiber reinforced polypropylene and a preparation method thereof. The lithium battery shell flame-retardant material is prepared from the following components in parts by weight: polypropylene, continuous glass fiber , coupling agent, main antioxidant, auxiliary antioxidant, lubricant, compatibilizer, composite flame retardant and black masterbatch. The preparation method is to put the above components except the continuous glass fiber into the high mixer and mix them evenly before entering the extruder, and then the extruder melts and extrudes the above materials into the impregnation equipment, and at the same time the continuous glass fiber enters the impregnation equipment It is dispersed and impregnated with the molten material, and finally pulled out from the shaping die of the impregnation equipment, cooled, dried, and pelletized to obtain the finished product. The invention has more excellent strength and toughness, is not easy to burn under an open flame, can effectively reduce the occurrence of battery burning accidents, and ensures that the shell has good plasticity and compressive strength.

The invention provides a cutting-off device of an indium wire for sealing a low-temperature pressure accumulator. The cutting-off device is used for cutting the indium wire with specific length, and overcomes the problems that in the prior air, in regard to special material cutting, the length and the angle of the cut indium wire cannot meet the technical requirements of the drawing, and the section of the cut indium wire is not flat and is large in deformation. A transmission assembly can be controlled through an electrical system, so that a movable cutter rest assembly can carry out accuratepositioning according to the length of the indium wire needing to be cut off; and the section of the indium wire is flatly pressed and cut off according to the length and the angle required to be cutoff through a cutting-off mechanism with a pressing structure.

The invention relates to a continuous fiber reinforcement polybutylene terephthalate material and a preparation method. The material comprises the following components in parts by weight: 500-700 parts of polybutylene terephthalate, 300-500 parts of continuous fiber reinforcer, 25-45 parts of compatilizer, 6-10 parts of antioxygen, 4-8 parts of lubricant, 12-18 parts of coupling agent and 5-15 parts of anti-hydrolytic agent. Compared with the prior art, the preparation method is reasonable in design, is simple in operation and is strong in practical applicability. The continuous fiber reinforcement polybutylene terephthalate material is adopted, so that the length of fibers in prepared part can be kept to be 3-6mm, and thereby, the rigidity and the strength of the material are greatly increased, and meanwhile, the shock resistance and the heat resistance of the material are obviously improved. Moreover, the continuous fiber reinforcement polybutylene terephthalate material has long-term anti-hydrolytic stability and chemical corrosion resistance.