摘要:
Systems and methods for molding shells for fluid-filled prosthetic implants, including spinning and rotating dip- or spray-mandrels during a devolatilization step to ensure an even covering. The mandrels may be spun during the dipping or spraying step, and/or afterward while a solvent evaporates until a gum state is formed. The techniques are particularly useful for forming hollow shells from silicone dispersions for soft implants, such as breast implants.
摘要:
A method for manufacturing an endless belt includes coating a solution containing a polyimide precursor and conductive particles on the circumferential surface of a core to form a first coating film, drying the first coating film so that the residual amount of a solvent of the first coating film falls within a range of from about 10% to about 20% in respective portions, coating a solution containing a polyimide precursor and conductive particles on the dried first coating film to form a second coating film, drying the second coating film, heating the first dried coating film and the dried second coating film so that the polyimide precursors are imidized, and removing the first coating film and the second coating film heated in the heating of the first coating film and second coating film from a core.
摘要:
Hollow, cylindrical, seamless metal master for producing seamless diffuser sheets of preselected length and width. Additional aspects of the invention include a hollow cylindrical seamless invertable elastomeric master and method of making the same and an apparatus and process for effecting variable diffuser recording in photosensitive medium.
摘要:
The invention provides methods for producing flexible, stretchable, and/or elastic products comprised principally of material such as natural elastomers and other synthetic polymers. The method for producing stretchable products by spraying product material over a workpiece former, and method for creating perforated products by spraying product material over fibres in an upright position. The invention provides methods for making double sided fibre coating of the product and, or to at least coating the product surface on the side facing the wall without the need for removing the product from the wall.
摘要:
For use in a rotational casting machine used for coating a rotating body with elastomer, such as polyurethane, there is provided a nozzle used for dispensing the liquid polyurethane onto the rotating body to be coated. The nozzle of the invention has a plurality of liquid-flow interior discharge-passageways each of which has an inlet connected to a sub-branch tube, which sub-branch tube is, in turn, is fluidly connected to a main branch that, in turn, is connected to a main inlet-passageway having the inlet that is directly connected to mixing head. Each discharge-passageway, or exit-passageway, changes in cross-sectional shape along the longitudinal axis thereof from its inlet to its outlet such that the cross-sectional area from the inlet to the outlet thereof gradually and minimally increases, whereby at least substantial laminar flow of the liquid is achieved with the concomitant reduced dwell-time of the liquid therein, in order to reduce in-nozzle reaction and subsequent clogging of the nozzle. The exit of the nozzle itself is constituted by the plurality of spaced-apart exit-openings or outlets of the discharge-passageways, where each such exit-opening or outlet is formed as a narrow, elongated slit or opening.
摘要:
A method of manufacturing a rolling shaft of a photo printer mainly has two rubber casings sleeved at two ends of a long cylindrical rod which is then placed horizontally; after that, the long cylindrical rod is sprayed with a layer of resin thereby forming an rubber wheel at the central position of the long cylindrical rod; finally, the rubber wheel is adhered with a layer of fine grain material with high coefficient of abrasion such that the rolling shaft has a preferred abrasiveness and causes no chemical reaction with the photo paper.
摘要:
A mounting fixture for making a chemical-resistant protective glove has a seal configured to seal the open end of a glove base so the glove base can be inflated. The seal can include a seal that inflates to press against a peripheral sealing ring. An air inlet enables the glove base to be inflated while secured in place on the fixture. A light enables the interior of the glove base to be illuminated, and seals and connections are provided enabling the fixture to be rotated while the glove base is inflated. The glove base can be rotated as a spray coating is applied, and a lamp lights the interior of the glove base as it is rotated and sprayed to assist the operator to identify unsprayed areas.
摘要:
Prophylactic devices are made in an inert atmosphere by cooling mandrels on which the devices are to be deposited, dipping the mandrels into a polymeric material in a solvent/carrier and a mold release agent, rotating the mandrels during and after the dipping, and evaporating the solvent after dipping. The apparatus includes an air lock between a section in which these functions are performed and a section located in an air atmosphere for removing the devices from the mandrels, followed by cleaning the mandrels for use in a subsequent production run for making devices.
摘要:
A process is disclosed for forming a thermoplastic structure on the exterior surface of the heated mold form. A mold is heated to approximately two times the melting temperature of a thermoplastic material and particulate thermoplastic material then sprinkled onto the exterior surface of the heated mold. An adhesively bondable material may then be added to the semi-molten thermoplastic material structure. The mold is then cooled and the resulting thermoplastic structure removed.An apparatus for practicing the above process comprising a mold form, heating system, and particulate thermoplastic material dispensing system is also disclosed.
摘要:
A fiber reinforced resin composite and its formation method is disclosed. The process comprises applying resin in a metered amount to fiber strands, winding the coated strands onto a drum while simultaneously applying chopped fibers to the area immediately to be covered by the strands as they are wound. The preferred material for both the wound strands and the chopped strand is fiber glass.