In-mold Degating

Fortunately we have in-mold degating technology that before mold is open cutting or extruding the gate to depart from product automatically, saving cost and improving productivity. Such a system is consisted of micro super high pressure cylinder, high speed and pressure cutter, timing control system and auxiliary accessories.

1 Gate gets departed from product inside of mold automatically which decreases labor use. Comparing to traditional process, secondary work stage to cut gate by labour is no longer necessary.

2 To decrease human made quality failure. In-mold thermal cutting molding process keeps product gate area with same appearance after automatic cutting which guarantees a high product quality.

3 To shorter molding cycle time and enhance production stability that such an automation system overwhelms traditional operation during mass production.

1 higher mould cost

As the elements used for in-mold degating are expensive which largely increases mould cost, this process is better applied for products of high value added.

2 higher requirement for mould fabrication process and machining quality

Thermal cutting tool making needs to guarantee machining precision and well cooperation with thermal cut system, e.g. if the cylinder mounting hole plane is not processed fine enough to seal would got the cylinder malfunctioned and if the cutter can’t work well with mold core may get it stuck.

3 complicated operation and maintenance

Quite easier to get components damaged from a wrong move during utility.

1 Control of Cutter Precision

For in-mold degating system many product quality problems during production come from not well control of cutter machining precision like part doesn’t get rid of stub bar, flashes and not well cut.

2 Cutter Tolerance and Mounting Process

Different material needs to match different cutter mounting tolerance and process, or the cutter may be stuck, cannot reset, material goes into gap between tool and cutter.

3 In-mold Degating Mould Design

A fine mould design will be significant to thermal cutting process application, there should be supreme solution for different products and materials.

In-mold Degating Cutter Design

1 make the cutting system beneath the gate

2 gate formed when the cutter back off and gate cut when cutter forward

3 the cutter end varies according to product shape, no need to design cutter edge.

Ejector plate and micro cylinder are both fine to drive the cutter, while the cylinder can be in different type according to how much force needed.

In order to choose suitable oil cylinder, we make a pressure sensor in mold to measure the max. Pressure during the complete injection moulding process and get the actual value of 535 Bar.

By the end of compression the filling is already done and the following packing is just for molten resin flow backward, so it is the right time to cut gate at this moment which not only guarantees the quality but also saves packing time.

Tips for the inside thermal gate cutting mould design as introduced here that even if the cylinder encountered problems, shutting down the hydraulic control system and the gate shifting into tap gate type, the production would go on to meet an emergency need.

Hot Tags: in-mold degating, China in-mold degating manufacturers, makers, In mold Gate Cut Mould, In mold Degating, in mold gate cut