摘要:
A method is disclosed for coating a projectile for use in an ammunition cartridge. A polymer jacket is applied to an undersized projectile core of a first standard caliber to bring the outer dimensions of the jacketed projectile into compliance with those of a second, larger caliber projectile. The polymer jacket coating may produce a non-uniform outer diameter of the polymer jacketed projectile and may include a plurality of circular cavities defined therein. The polymer-jacketed projectile may be a bullet for pistol or rifle ammunition, or a pellet, or shot for use in a shotgun shell.
摘要:
An exemplary process includes determining a desired pore size, selecting an initial pore size greater than the target pore size, manufacturing a porous structure with the initial pore size, forging the porous structure to form a forged part having the desired pore size, and forming an orthopedic device from the forged part.
摘要:
Provided is a conductive roller in which the occurrence of an image defect caused by a pressure mark is suppressed. In this conductive roller, plural resin layers are arranged on the outer circumference of a shaft 4. The resin layers include at least a base layer 1 and a surface layer 3 from the inner circumferential side. The plural resin layers all have a loss tangent (tan δ) of 0.2 or less at a temperature of 40° C. and, among the plural resin layers, at least a pair of two adjacent layers satisfy a relationship of G′o≤G′i between the elastic modulus G′o of a layer positioned on the outer circumferential side and the elastic modulus G′i of a layer positioned on the inner circumferential side.
摘要:
The polymeric pipes reinforced with a metal casing are used for transporting oil and gas, acids, alkali products, drinking water and industrial water, and also in the transportation of aggressive and neutral pulps. A metal-containing polymeric reinforced pipe includes a welded metal casing and a polymeric matrix having an amorphous-phase-based molecular structure. The metal-containing polymeric reinforced pipe is produced by extrusion moulding with simultaneous feeding of a polymer melt and the reinforcing metal casing into the mould cavity, followed by intensive cooling of the internal and external surfaces of the pipe being moulded. The invention increases the quality and endurance limit in the radial direction of the metal-containing polymeric reinforced pipe, productivity of the process for manufacturing the pipe, and also the strength and technological effectiveness of a pipeline constructed from the pipes produced.
摘要:
The present disclosure provides a metal-resin composite and a method of preparing the same. The metal includes titanium or titanium alloy, the composite includes a metal substrate and a resin layer coated on at least a part of a surface of the metal substrate, recesses are distributed on the part of the surface of the metal substrate coated with the resin layer, a part of resin of the resin layer extends to fill in the recesses, and a concentration of an oxygen element on the surface of the metal substrate is greater than 1 wt %. The method includes dipping a metal substrate in an etching solution containing at least one alkali metal hydroxide so as to form recesses on the surface of the metal substrate, and injecting a resin onto the surface of the after-surface-treatment metal substrate to form a resin layer. The metal-resin composite of the present disclosure is suitable for a shell of an electronic product.
摘要:
A method of assembling a syringe with needle is provided. The method may include preparing a mold for forming a tube hole of a main body of the syringe, a first part and a second part for forming a connection part of the syringe, and a third part for forming a close contact part of the syringe, supporting and securing a proximal portion of a needle tube by the mold, injecting the resin into the mold, and forming the syringe and the needle tube integrally by forming the syringe around the needle tube.
摘要:
A process of manufacturing a totally implantable venous device is provided with forming a catheter; securing a locking nut of the catheter is secured to a proximal end of the catheter; forming a base of injection seat; forming a connecting tube to communicate with injection seat and catheter; putting the locking nut on a bulged central portion of the connecting tube; forming a base and a housing by injection molding with the base of injection seat disposed therein and the locking nut disposed in both the housing and the base; forming a space on a top of the injection seat to communicate with the injection seat; and forming an injection membrane in the space to seal the space.
摘要:
Method for purifying a solution of at least one plastic in a solvent, the said solution comprising insolubles, whereby the solution is purified using a centrifugal settler.
摘要:
Hydrogravity separation of a multiple domain solid feedstock is disclosed which comprises granulating the feedstock to produce particles each of substantially a single domain, with each type of particle having a different density. The particles are slurried into a suitable fluid. A dispersion mixer having a high shear and/or turbulent zone is utilized to disperse agglomerated particles and a quiescent hydrogravity tank is utilized to effect binary separation of the mixture of particles into a stream with a higher average specific gravity, and a stream with a lower average specific gravity. A high degree of product purity is obtained by feeding one or both of the initial product streams to a collection of dispersion mixer/hydrogravity tank units using a fluid of substantially the same specific gravity.
摘要:
Systems and methods for providing a quantity of cullet having at least two colors of glass from an input stream of recyclable material and non-recyclable material. In an embodiment, the system includes a sortation station, a screening apparatus, an air classifier, and a crushing apparatus to provide as output substantially pure cullet having at least two colors.