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What character does screw have?
From;    Author:Stand originally

Plastic model is changedScrewExterior of according to geometry is divisional 3 section:

1, into makings area (Feed Zone) this section is fixedScrewThe trench of snail channel is deep, its function reachs elbow to be in charge of warm-up and plastic solid body carrying. Must assure plastic in into makings paragraph melt begins when the end (want warm-up to arrive that is to say melting point) . Cent of this section length is crystallization sex (Pom, Pa‧‧ ) > blame crystallization sex (Ps, Pu, Abs) > heat quick sex (Pvc) . It is commonly: Be not crystallization sex: Make an appointment with 48~58%l... (As, Abs, Ps) crystallization sex: Make an appointment with 48~58%l... (Pa, Pom, Pe, Pp, Ca) the sex that add Bo: Make an appointment with 45~55%l.

2, reduce an area (Compression Zone) this section is shrink graduallyScrewSnail channel tooth is deep, its function is melt of plastic raw material, mix refine, cut compress with pressurization exhaust. Plastic can dissolve completely in this paragraph, bulk will be contractible, the design that reduces rate so (compression ratio) very important. Average length is: Be not crystallization sex: Make an appointment with 25~35%l... (As, Abs, Ps) crystallization sex: Make an appointment with 22~32%l... (Pa, Pom, Pe, Pp, Ca) the sex that add Bo: Make an appointment with 28~40%l Pvc: 100%l 3, metric area (Metering Zone) this section isScrewSnail channel secures channel deep, its are main the function mixes glue of refine, frit to carry, metric besides, still must provide enough pressure, maintain frit glue the discharge with even temperature and stable plastic melt. Average length is: Be not crystallization sex: Make an appointment with 15~58%l... (As, Abs, Ps) crystallization sex: Make an appointment with 48~58%l... (Pa, Pom, Pe, Pp, Ca) the sex that add Bo: Although model is changed,make an appointment with 45~55%lScrewCan distinguish according to function or geometrical exterior, but actual model changes a course in, one on top of another of each section function, try very hard to distinguish removed. And study model is changedScrew, nothing more than it is to want:

One, rise cut mix refine (Dispersive Mixing) action.

2, improved and even mix refine (Dispersive Mixing) .

3, raise model to influence ability (Plasticating Capacity) .

4, improve uniformity of frit glue temperature. Should enter expect paragraph of tooth is deep more deep carry a quantity to heal big, butScrewBe needed torsional bigger; Into expect paragraph of tooth is deep too shallow, carry an amount insufficient, compression ratio is insufficient. When metric paragraph of tooth is deep too deep, compression ratio is insufficient, be needed to send makings force bigger; Too shallow when easy and ham and scorch. General tooth makes an appointment with 0.03~0.07 greatly times
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