摘要:
A weld stud having a cylindrical section permitting engagement by a stud welding gun, joined by a shoulder on to a threaded shank covered up to the shoulder by a cap nut made of plastics, wherein the cylinder section changes through a chamfer into a shoulder and the cap nut is provided with a resilient lip, which stretches to cover the chamfer when the cap nut is brought into contact with the shoulder. The threaded shank may have a ridge close to the shoulder which engages in a corresponding annular recess inside the cap nut. The cap nut may have a coaxial, preferably conical, projection at its end opposite the lip.
摘要:
A two-part plastic clip for securing a trim moulding to a panel of a vehicle body comprises a hollow body member for reception over a threaded weld stud and a locking member slidable therein. The locking member has resilient arms which project through apertures in the body member both to hold the parts together for handling purpose before use and to hold the moulding against a flange of the body member after the clip has been inserted through a hole in it.
摘要:
A metal blind rivet assembly having a plurality of ribs with flutes between them located about the circumference of the barrel of the rivet sleeve. The ribs are arranged in a helix and at an angle so that during the setting operation a twisting motion takes place to scrape the workpiece so that contaminants such as dirt or varnish are removed to provide electrical contact with the workpiece.
摘要:
Method for preparing polyurethane resin directly in finely divided form in which method a first reactant for forming the polyurethane is emulsified as fine droplets with the aid of special surfactants and controls in an inert organic liquid medium in which it and polyurethane resin are insoluble, a second reactant for combination with the first reactant is introduced into the liquid medium and interacted interfacially with the droplets of the first reactant to form fine particles of solid polyurethane resin protected from agglomeration by the surfactant, and the particles of polyurethane resin are separated from the liquid medium.
摘要:
A method and apparatus are provided for mixing and dispensing multiple component materials wherein the materials may be supplied substantially continuously in controlled ratio in a substantially concurrent mixing and dispensing cycle, the mixing being accomplished first in a premix stage by impingement means and then in a mixing stage by agitator means wherein both impingement mixing and vortex flow mixing of the component materials are performed on the material in a single mixing head prior to dispensing the material into a mold.
摘要:
A shoe lasting machine having nozzles for applying adhesive progressively to the margin of a shoe bottom, in which the nozzles are moved heightwise to engage the shoe bottom and widthwise to engage a guide of the nozzle with the edge of the shoe bottom, movement of sensor fingers associated with each nozzle being effective to control the movements of the nozzles and a shoe support to cause the nozzles to follow the marginal contour of the shoe bottom to apply adhesive progressively thereto.
摘要:
Process for applying adhesive to a surface, particularly for attaching a tread member to a shoe in which an adhesive applicator including a jet providing a gas stream having a rotational component is constructed to extrude viscous fluid adhesive to form a filament and to lay down the filament while still soft and adhesive as a band of overlapping loops directly on the attaching surface of an element to be adhered. The elements to be joined are pressed together with the adhesive between them and the adhesive is hardened.
摘要:
A machine for lasting stitchdown shoes having a support generally co-extensive marginally with an insole peripheral extension, at least around one end of a shoe; a flexible band generally shaped to suit the one end of the shoe; and means for moving the support and the band to wipe a shoe upper heightwise about a last and to press an outturned margin of the upper against the insole extension.
摘要:
Apparatus is provided for applying a coating to portions of a workpiece and comprises a nozzle having outlet ports opening into a longitudinal bore in the nozzle, a tube slidably mounted in the bore and means for effecting relative movement between the nozzle and the tube to cover and uncover the outlet port so that coating material can pass therethrough. The nozzle is rotated adjacent a moving workpiece and the ports open into recessed portions formed in the outer end portion of the nozzle which form gaps between the workpiece and nozzle into which the coating is extruded.
摘要:
The process of coating a polymer resin including the steps of cross linking the surface of the resin and generating ''''living'''' radicals at the surface of the resin by ultraviolet light radiation and thereafter applying a polymeric resin coating composition including groups which will combine with the surface through the action of the ''''living'''' radicals.