1.side gate, also called the edge gate, rectangular gate, gate type is used in a most, which is also called the common gate, the cross-sectional shape of the general processing into a rectangle, it is also called the rectangular gate. It usually opens at the parting surface, the feed from the lateral cavity. Because of the general side gate size is smaller, so the relationship between the section shape and pressure, heat loss is negligible. Rectangular gate length 0.5-3mm, width 1.5-5mm, gate depth is 0.5-2mm.
  2.Advantages of side gate. Section shape is simple, easy processing, can carry on the fine processing of gate size, surface roughness is small; according to the structure characteristics and molding of plastic parts, flexible choice of gate location, such as a box shaped or circular pieces of plastic, the gate can be located outside, also can be located in the medial; due to the small size of section, so remove the gate easily, small traces, product without the fusion line, good quality; for the nonequilibrium gating system, gate size change reasonably, can change the molding conditions and molding condition; the side gate is generally applicable to multi cavity mold, so productivity is very high, sometimes also used for the single cavity mold.
  3.side gate defects. For the shell shaped pieces of plastic, the gate is not easy to exhaust, but also prone to weld lines, shrinkage defects; in the plastic parts of the surface are permitted and feeding traces the circumstances may use the side gate, otherwise, only another runner; injection pressure loss, pressure feeding as with smaller than straight gate. Application of 4 side gate. Application of side gate is very extensive, especially suitable for two plate type multi cavity mold for casting, many small and medium-sized plastic parts.