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#124 Gate Cutting Unit inside the Mold

Category : Misumi Products Guide
May25, 2012

When injection molding is done with a cold runner, this is a unit product for cutting off the gate using the operation of opening the mold.

Side gates or submarine gates having large gate diameters are used for the gates of thin walled molded article or of molded article in which shrink is not acceptable. But when this is done, not many people would have found it troublesome to carry out cutting of the gates in the subsequent processes.

The "Gate cutting unit inside the mold" is a mechanism by which the gate part is rotated along a spiral groove with the parting surface still closed thereby cutting the gate.

Since the cutting can be done inside the mold, the gate cut surface becomes uniform, and also, it is possible to suppress the generation of gate shreds at the time of cutting.

The following types of structures can be used for the gate.

1) Side gate
2) Submarine gate
3) Jump gate (overlap gate)

In particular, its effect can be expected during the formation of caps, lids, and cases of containers. The effect is further enhanced when the volume of production is medium to large.

The diameter of the rotating gate pin comes in two types, φ16 mm and φ20 mm. High speed steel is used as the material for this.

The materials for which this mechanism can be used are - ABS ,PS , PA 6, PA 66, PBT, POM, PPS, PC, etc.
(This is not suitable for acrylic resin etc. in which case cracks are generated during cutting.)

Since there are limitations on the size of the mold, plate thickness, etc., at the time of considering the use of this mechanism, please check the details given on the catalog page the link to which has been given below.

When it is difficult to use a hot runner gate due to limitations on the gate position, etc., or when a side gate, etc., must be provided this offers a new option.

The cost of cutting the gate becomes quite a substantial amount when the volume of production increases. This product brings out its advantages when trying to reduce these costs.

Click here to view the details of the product "Gate cutting unit inside the mold".

MISUMI USA eCatalog