The Advantages of Hot Runner

The runner is a channel machined into the mould plate to connect the sprue with the entrance to the impression. Generally speaking, there are two kinds of runner: one is cold runner, another one is hot runner. But in this text we just talk about the advantages of hot runner.

There are several common types of hot runner, like pin point gate, direct gate, valve gate, special gate, horn gate, timer valve gate and so on. Each of them has its advantages:

1. Pin point gate

1.1 There just has a spot in the plastic parts appearance

1.2 The temperature around gate basin is low

1.3 It suitable for crystalline and amorphous material

2. Direct gate

2.1 Compare with pin point gate, direct gate has a open and direct runner

2.2 Its injection quantity is bigger and injection pressure is smaller

2.3 It is suitable for long flow length and the thicker wall thickness injection parts

3. Valve gate

3.1 Compare with pin point gate and direct gate, the spot in the plastic parts appearance is really small and nice

3.2 Valve gate is automatic opening and closing through valve needle

4. Timer valve gate

4.1 Relative to valve gate, timer valve gate can control the gate inject in turn to keep injection balance.

All in all, hot runner can save material, gate trace is nice, reduce cycle time and improve product quality.

Post by Miss Mandy

Email: auto@sinomould.com

Skype: sino.mould