Plastic Basket Mold

Two-plate plastic basket mold

If the plastic basket mold separates into two main pieces or halves，on either side of the mold split line, then the mold is referred to as a two-plate injection mold. 2 cavities mold will produce two plastic baskets (during each shot or cycle, it is a two-impression mold. Each cavity is filled by means of a feed system and this feed system.)

The sprue is usually a tapered circular channel through which the material flows after leaving the nozzle of the injection molding machine. In the case of multi-impression molds, the cavities are joined to the sprue by means of runners. These runners are channels that are cut in one or both mold halves and their function is to fill each mold cavity as efficiently as possible.

In between the runner and the cavity, there is usually a narrow restriction in the runner system and this restriction (where the material enters the cavity) is called the gate. (As the gate size is much smaller than the runner，the plastic basket molding may be easily separated from the feed system at this point when desired.)

During molding the plastics material is forced through the sprue, into the runner system, and from there into the cavity (or cavities). The plastic basket is formed between the opposing core and cavity, and the surface finish on the component is dictated by the surface finish on these two mold parts.

The half of the mold that moves with the clamp is referred to as the moving-mold half and provisions are usually made to ensure that the molding is retained in this half of the mold. This is because the molding ejection system is associated with the moving-mold half for reasons of cost, convenience, etc. the plastic basket molding is made to stay with the moving-mold half by using what is known as a “sprue puller”. Because this sprue puller has a re-entrant shape it dislodges or pulls，the sprue from the sprue bush when the mold is opened. At the end of，or during, the plastic basket mold opening stroke the ejector system is activated and this clears the moldings, and their associated runner system, from the mold. The depression immediately opposite the sprue, which contains the sprue- puller pin, is also known as the “cold slug well”，and its function is to accept the first part of the shot, that part of the shot which was located at the tip of the nozzle and which could therefore be cold.

To ensure that plastic basket production is consistent and uniform the plastic basket mold temperature is controlled, e.g. by circulating water through cooling channels (in the case of thermoplastics) or by means of electrical resistance elements (in the case of thermosets).