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Finishing technique to remove excess material (flash) from a plastic or metal molding.



Related Terms

SUBMERGED ARC WELDING

An arc welding process that produces coalescence of metals by heating them with a bare metal electrode. the arc is maintained with a blanket of granulated flux. A consumable filler wire is employed and the arc is maintained between this wire and the parent plate. Around the arc the granulated flux breaks down and provides some gases and a highly protective thermally insulating molten container for the arc. This allows a high concentration of heat, making the process very efficient and suitable for heavy deposits at fast speeds. After welding the molten metal is protected by a layer of fused flux which together with the unfused flux may be recovered before cooling.

The process is basically only intended for down hand applications and where it is used for single pass welding of any size it is essential to use some form of the backing bar because of the comparatively large weld pool obtained. Here the backing bar may be of copper and waste cooled or a flux trough may be provided to form the underbead.

HEAT PIPE

A heat-transfer device consisting of a sealed metal tube with an inner lining of wicklike capillary material and a small amount of fluid in a partial vacuum; heat is absorbed at one end by vaporization of the fluid and is released at the other end by condensation of the vapor.

CAPACITANCE LEVEL INDICATOR

A level indicator in which the material being monitored serves as the dielectric of a capacitor formed by a metal tank and an insulated electrode mounted vertically in the tank.

MASK

  1. A frame used in front of a television picture tube to conceal the rounded edges of the screen. 2. A thin sheet of metal or other material containing an open pattern, used to shield selected portions of a semiconductor or other surface during a deposition process. 3. A protective covering for the face or head in the form of a wire screen, a metal shield, or a respirator.

BRAZED SHANK TOOL

A metal cutting tool made of a material different from the shank to which it is brazed.

CASING

A covering of sheets of metal or other material such as fire resistant composition board used to enclose all or a portion of a steam-generating unit.

IMMERSION COATING

Applying material to the surface of a metal or ceramic by dipping into a liquid.

BASE

A material which neutralizes acids. An oil additive containing colloidally dispersed metal carbonate, used to reduce corrosive wear.

HYBRID BEAM

A metal beam with flanges fabricated from a material that differs from that of the web plate and has a different minimum yield strength.

CONDUCTION COOLING

Cooling of electronic components by carrying heat from the device through a thermally conducting material to a large piece of metal with cooling fins.

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