Problem & Solution

Practical answers to common plastic material challenges

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PP '2079851475616104452 Shear Mark (Melt Fracture Mark)

Injection Molding PP;shear mark;melt fracture;gate;injection speed

PP Injection Cycle Fluctuation Material Shortage

For alternating shortage, check the metering system.

Injection Molding PP;short shot;metering;check ring;bridging

PP '2079851475616104452 Cold Slug Mark

Injection Molding PP;cold slug mark;cold slug well;nozzle temperature;gate

PP '2079851475616104452 Black Speck

Black speck control relies on normalized dead-spot cleaning.

Injection Molding PP;black speck;carbonization;dead spot;purging

PP Glass Fiber Floating Fiber

Injection Molding PP;glass fiber;floating fiber;coverage;melt temperature;mold temperature

PP Trapped Gas Burning

Injection Molding PP;trapped gas;burnt;diesel effect;vent groove;short shot method

PP Short Shot

PP short shots are mostly a balance problem of speed and venting.

Injection Molding PP;short shot;injection speed;venting;wall thickness

PP Tiger Stripe (Flow Mark)

Tiger stripes are flow imprints of rubber phase distribution—stable speed is the core.

Injection Molding PP;tiger stripe;flow mark;injection speed;rubber phase

PP Flash

For flash of low-viscosity materials, pressure restraint comes first.

Injection Molding PP;flash;low viscosity;injection pressure;clamping force

PP '2079851475616104452 Warpage Deformation

Injection Molding PP;warpage;shrinkage rate;mold temperature;crystallization

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