Injection molds for pipe fittings

One major processes used in manufacture plastic pipe fittings is the injection molding. Equipment to mold fittings consists of a mold and an injection molding press.

• The mold is a split metal block (usually steel or stainless steel) that is machined to form the cavities in the block. Hollows in the mold parts are created by tools shaping the part cavity. The molded parts are created by filling the cavity in the mold through a filling port called gate. Depending on the part to be made, an injection mold can be made with multiple cavities and integrated by several gates.
  Also this type of parts are generally hollow. Then is important the design of the cores in order to produce an enough quality for internal surfaces, that are very important in the suitability of the pipe fitting.
• The injection molding press has two parts, a press to open and close the mold and an injection extruder to inject material into the mold cavity.

When the mold is closed, the melted material is injected into the mold cavities under high pressure then, the mold is cooled by water circulating and when the parts has solidified, the mold is opened and parts are ejected.