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Q

Flow Marks Appearing on the Surface of Block Copolymer Polypropylene Injection Molded Products

A

Flow marks are a manifestation of an unstable melt flow front, and the flow front is stabilized by increasing the injection speed, mold temperature, and melt temperature.

Injection Molding flow markinjection speedmold temperaturemelt frontmulti-stage injection

Q

Uneven Surface Gloss of Block Copolymer Polypropylene Injection Molded Products

A

Uneven gloss reflects the inconsistency of the mold surface condition and melt flow, and needs to be improved from three aspects: mold polishing, temperature uniformity, and injection process.

Injection Molding uneven glossmold polishinguniform temperatureinjection speedcooling system

Q

Weld Lines Appearing on Block Copolymer Polypropylene Injection Molded Products

A

Weld lines are a manifestation of poor melt convergence and fusion, and the melt fusion quality is improved by increasing the melt temperature, injection speed, and mold temperature.

Injection Molding weld linemelt convergenceinjection speedmold temperaturegate design

Q

Burnt Marks/Burnt Spots Appearing on Block Copolymer Polypropylene Injection Molded Products (Variant: Strengthened Measures)

A

Burnt marks are the result of trapped gas in the cavity being compressed and heated, causing carbonization of the material; the core solution measures are to improve venting and reduce the injection speed. Targeted preventive measures need to be taken in different production scenarios.

Injection Molding burnt markburnt spotmold ventinginjection speedtrapped gas compression

Q

Bubbles/Voids Appearing on the Surface of Block Copolymer Polypropylene Injection Molded Products

A

Bubbles and voids are mainly caused by water vaporization, gas involvement, or insufficient shrinkage compensation, and need to be systematically solved from raw '2079851475616104451, injection process, and holding pressure parameters.

Injection Molding bubblesvoidsraw '2079851475616104451holding pressuremulti-stage injection

Q

Warpage Deformation of Block Copolymer Polypropylene Injection Molded Products

A

Warpage deformation is the core problem of '2079851475616104452 of crystalline materials; its essence is the internal stress caused by non-uniform shrinkage, and it needs to be systematically controlled from multiple dimensions of design, process, and mold.

Injection Molding warpage deformationcrystallization shrinkageuniform mold temperatureuniform wall thicknesscooling time

Q

Out-of-Tolerance Flatness of Block Copolymer Polypropylene Injection Molded Products (Variant: Strengthened Measures)

A

Out-of-tolerance flatness is a manifestation of uneven shrinkage of large-area products, and the shrinkage uniformity in all directions needs to be controlled by optimizing cooling, gating, and product design. Targeted preventive measures need to be taken in different production scenarios.

Injection Molding out-of-tolerance flatnessuneven shrinkageuniform coolingmulti-point gatesymmetric reinforcing ribs

Q

Out-of-Tolerance Roundness of Block Copolymer Polypropylene Injection Molded Products (Variant: Strengthened Measures)

A

Out-of-tolerance roundness is caused by non-uniform shrinkage, and needs to be improved from three aspects: cooling symmetry, gate design, and wall thickness uniformity. Targeted preventive measures need to be taken in different production scenarios.

Injection Molding out-of-tolerance roundnessanisotropic shrinkageuniform coolinggate positionuniform wall thickness

Q

Stress Whitening Near the Gate of Block Copolymer Polypropylene Injection Molded Products (Variant: Strengthened Measures)

A

Gate stress whitening is caused by excessive shear stress and molecular orientation, and is improved by enlarging the gate, reducing the injection speed, and increasing the temperature. Targeted preventive measures need to be taken in different production scenarios.

Injection Molding stress whiteninggate shearmolecular orientationinjection speedgate size

Q

Cracking/Microcracks Appearing on the Surface of Block Copolymer Polypropylene Injection Molded Products (Variant: Strengthened Measures)

A

Microcracks are a manifestation of excessive residual internal stress, and need to be prevented by optimizing temperature parameters, reducing internal stress, and improving demolding conditions. Targeted preventive measures need to be taken in different production scenarios.

Injection Molding crackingmicrocracksinternal stressmolecular orientationdemolding draft

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