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Clean nozzle and sprue bushing by making few shots; Continue purging until most of the commercial purging material is out of the hopper; Feed at least one injection capacity of the next production resin to rinse out any residuals; Start the next production with new resin
The sprue is a large-diameter channel through which plastic flows, usually around the edges of the part or along straight lines. The runner is a smaller channel from the sprue to the individual part. An analogy may be found in a water system that employs a water main (sprue) and smaller pipes (runners) to individual houses.
Sprue puller pin—The sprue puller pin pulls the sprue from the sprue bush. It is usually made of CHMCS; Core back plate—It holds the core insert in place and acts as a "stiffener". It is usually made of mild steel. Guide pillar and guide bushing — The guide pillar and guide bush align the fixed and moving halves of a mold in each cycle.
(A) Sprue, (B)&(C)runner and (D)gates in actual injection moulding product for toys The amount of resin required to fill the sprue, runner and cavities of a mould comprises a "shot". Trapped air in the mould can escape through air vents that are ground into the parting line of the mould, or around ejector pins and slides that are slightly ...
The ejector die contains the ejector pins and usually the runner, which is the path from the sprue or shot hole to the mould cavity. The cover die is secured to the stationary, or front, platen of the casting machine, while the ejector die is attached to the movable platen.
A sprue may refer to: Sprue (manufacturing), a feature in molding and casting molds; Coeliac disease, also known as sprue, a disease of the small intestine;
Bushing (bearing), a type of plain bearing; Bushing (electrical), an insulated device that allows a conductor to pass through a grounded conducting barrier; Bushing (isolator), a mechanical device used to reduce vibrational energy transfer between two parts; Drill bushing, a tool used to guide the placement of a hole when drilling in a workpiece
Galling is a common problem in most applications where metals slide in contact with other metals. This can happen regardless of whether the metals are the same or different. Alloys such as brass and bronze are often chosen for bearings , bushings , and other sliding applications because of their resistance to galling, as well as other forms of ...