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Respostas práticas para os desafios comuns dos materiais plásticos

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Q

ABS heat-resistant grade processing

A

The mold temperature management of ABS heat-resistant grade is performance assurance; boundary evaluation ensures application; verification ensures long-term.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling ABS; heat-resistant grade; high temperature; mold temperature; heat deformation; stability

Q

ABS gate 50/60 rule

A

The 50/60 rule of ABS gates is a design standard; position and size both emphasized; ensuring feeding prevents sink marks.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling ABS; gate; 50/60 rule; wall thickness; feeding; sink mark

Q

ABS draft angle 1.5-2°

A

ABS draft angle is a design specification; textured surface compensation; ejection and surface both emphasized.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling ABS; draft angle; 1.5-2°; texture; ejection; deformation

Q

ABS shrinkage rate 0.4-0.7

A

ABS low uniform shrinkage is a dimensional accuracy advantage; mold design is precise; verification ensures accuracy.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling ABS; shrinkage rate; 0.4-0.7%; amorphous; dimension; mold

Q

ABS mold temperature 50-80

A

The 50-80°C of ABS mold temperature and high-gloss 60-90°C are standards; the 60°C lower limit and 90°C upper limit are boundaries; balance optimizes quality and efficiency.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling ABS; mold temperature; 50-80°C; high gloss; 60-90°C; stress

Q

ABS glass fiber orientation type warpage

A

GF-ABS orientation-type warpage is broken by 'gate design', not by hard pressing with cooling: once the warpage direction is fixed, you should go back and review the gate and orientation, rather than repeatedly trying mold temperatures.

Molds & Tooling ABS；glass fiber；orientation；anisotropy；warpage

Q

ABS nozzle drool and cold slug marks

A

ABS drool and cold slug marks often have the 'same source': for drool, first lower the nozzle temperature and add suck-back; cold slug marks rely on the cold slug well to catch the front cold material; both point to nozzle temperature and cold material management.

Molds & Tooling ABS；drool；nozzle；suck-back；cold slug mark

Q

ABS mold sticking (difficult demolding)

A

For ABS mold sticking, first 'reduce pressure and temperature', then 'repair the draft angle and polishing', and finally deal with vacuum adsorption; the polishing quality along the demolding direction often affects the demolding feel more than the draft angle.

Molds & Tooling ABS；mold sticking；draft angle；gripping force；polishing

Q

ABS brittle cracking——product structure stress concentration

A

A sharp corner in the ABS structure is the starting point of a crack: rounded corners, uniform wall thickness, and reasonable reinforcing ribs are the three structural means to prevent brittleness; many 'material brittleness' cases are actually mines buried by the design, and must be removed from...

Molds & Tooling ABS；brittle cracking；stress concentration；sharp corner；rounded corner；structural design

Q

ABS brittle cracking——draft angle and insert problems

A

ABS's draft angle and insert preheating are often overlooked: insufficient draft angle plus forced ejection = cracking, no insert preheating = interface stress cracking; these two details of structural parts must be fixed at the design stage.

Molds & Tooling ABS；brittle cracking；draft angle；insert；shrinkage difference；preheating

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