544results about How to "Increased strength and rigidity" patented technology

The invention discloses polyurethane rigid foam and a preparation method thereof, wherein foam plastic is prepared from the following raw materials by a high pressure foaming machine in parts by weight: 100 parts of combined polyether, 1.5-3 parts of surfactant, 1.5-3 parts of complex catalyst, 1-3 parts of water, 16-26 parts of mixed foaming agent and 140-170 parts of polymerized isocyanate, wherein the mixed foaming agent consists of methyl formate and 1,1,1,3,3-pentafluoropropane (HFC-245fa). The prepared polyurethane foam has low heat conductivity, good dimensional stability and proper cost.

There is described an apparatus for a concrete form for an insulated wall. The apparatus comprises first and second wall panels arranged in opposed spaced apart parallel relationship, each panel having an inner surface, an outer surface, an upper edge surface, a lower edge surface and end surfaces. A plurality of retainers are secured within each of said first and second panels at spaced apart intervals, each retainer including a connecting portion extending outwardly from the inner surface of each panel, and an anchoring portion. The anchoring portion includes a framework disposed within the panels, an upper connector extending upwardly from each panel's upper edge surface and a lower connector extending downwardly from each panel's lower edge surface. The upper and lower connectors are adapted to respectively engage the upper and lower connectors of the next vertically adjacent panel to securely attach the panels together. A plurality of cross webs extends between the first and second panels to tie them together, the cross webs being adapted for respective connection to the connecting portions of opposed retainers in the first and second panels.

A cargo protecting system for a vehicle having a load-carrying bed comprises a support structure and a bed floor fixedly supported by the support structure. The support structure forms at least a portion of a frame of a vehicle. The bed floor includes a support surface having a plurality of longitudinal extending, spaced apart raised ridges for directly supporting cargo. Each ridge has elevated and angled parts and an upper part. The upper part of each ridge has an increased thickness compared to the other parts and a raised section for increased strength and rigidity of the ridge. Each ridge includes a wear resistant surface having a first texture disposed substantially over the entire ridge and a second texture disposed over the upper part of the ridge. The second texture is disposed at least partially over the first texture.

The invention provides a numerical display type radial drilling machine, comprising a spindle speed regulating and spindle feeding speed regulating system, a spindle feeding mechanism, a spindle and balance mechanism, a spindle positive / negative rotation and variable-speed control mechanism, a rocker arm and clamping mechanism, an upright and rocker arm lifting mechanism, a hydraulic and cooling system, a testing system, a numerical display control system and the like; the upright and rocker arm lifting mechanism is mounted on a base; the rocker arm and clamping mechanism is mounted on the upright and rocker arm lifting mechanism; the numerical display control system is mounted on the upright and rocker arm lifting mechanism; the spindle speed regulating and spindle feeding speed regulating system is mounted on the rocker arm and clamping mechanism; the spindle feeding mechanism, the spindle and balance mechanism, the spindle positive / negative rotation and variable-speed control mechanism, and the hydraulic and cooling system are mounted on the spindle speed regulating and spindle feeding speed regulating system. According to the numerical display type radial drilling machine, stepless speed changing of a spindle can be realized without shutdown; graphic and numerical display can be realized at working positions; a die wall clamping device of a guide rail and a spindle limiting structure are sensitive and reliable; in short, the numerical display type radial drilling machine is applicable to machining industries.

A molded firearm stock is disclosed. The stock includes a molded front sling lug and a molded rear sling lug. Both sling lugs are integrally molded to the stock and accommodate the fastening of a sling. The stock also includes a cavity with an open end that is open to a butt-plate of the stock. The cavity is integrally molded to the stock and is sized to accommodate a recoil-reducing device. The stock has a bed portion with a forward section, and a plurality of crossbeams are in the forward section to provide increased strength and rigidity.

A memory card socket structure includes a card compartment for allowing a memory card to be inserted thereinto or taken out therefrom, a contact block disposed at a rear side of the card compartment, a slider moved back and forth between a position near the opening side and a position near the rear side in the card compartment along with an insertion and extraction of the memory card, a coil spring for pressing the slider toward the opening side of the card compartment, and a spring guide fixed at the contact block and elongated toward the opening side of the card compartment to be inserted through the coil spring. The spring guide includes a base end portion provided with a connection portion to be adjoined to the circuit board.

The invention discloses an integral forming method of a weldless axle housing of a heavy truck. According to the method, reversed central spindle necking is carried out on two sides of the axle housing first, then hydro-bugling is carried out on the middle of the axle housing to obtain a bulging tube blank with sizes of two sides of the axis different, and then necking is carried out on two ends of the axle housing to obtain a preformed tube blank; ends of the preformed tube blank are sealed by a left pressure head and a right pressure head of a die and liquid is filled in the axle housing on a four-way hydraulic machine, integral press-forming is carried out on the preformed tube blank from the upper side, the lower side, the front side and the back side through an upper module, a lower module, a front module and a back module to obtain an axle housing tube fitting, a hemispherical rear oil cap is arranged on the rear side of an axle package part, and the front side of the axle package part is a plane; a round hole is punched in the front side of the axle package, the rear oil cap is reshaped with a stamping die, and then an axle housing workpiece is obtained. The heavy truck axle housing manufactured with the method is weldless, high in strength and rigidity, high in shape accuracy, good in wall thickness distribution, and low in manufacturing cost. Compared with a traditional hydro-bugling technique, the method has the advantages that liquid pressure needed in a manufacturing process is reduced by more than 60% and the tonnage of forming equipment is reduced by more than 50%.

A steering column device where an inner column can be reliably clamped and sufficient rigidity and strength of an outer column can be achieved. A semi-circular arc rib (132) is formed on the peripheral edge of a closed end section (131) of a slit (13). The rib (132) is substantially semi-circular are-shaped and projects outward from an outer peripheral surface (15A) of an outer column (1). Further, linear ribs (133A, 133B) extend linearly toward the vehicle body front side so as to be continuous from the vehicle body front side of the semi-circular arc rib (132). The semi-circular arc rib (132) and the linear ribs (133A, 133B) reinforce the peripheral edge of the slit (13) of the outer column (1) whose rigidity and strength are impaired. Thus the rigidity and strength of the outer column (1) are improved.