HIPS Injection Molding
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High-quality HIPS (High Impact Polystyrene) Injection Molding solutions tailored to meet the diverse needs of industries worldwide.
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What is HIPS Plastic?
HIPS is a versatile thermoplastic material known for its excellent impact resistance, ease of processing, and cost-effectiveness, making it a popular choice for a wide range of applications.
Description
Full Name
High Impact Polystyrene
Process
Finishing options
Mold texturing，Pad printing，Laser engraving，Electroplating, Bead Blasting
Strain at Yield (%)
1.8 %
Prices
$$
Features
Appearance
White, Black, and Colorful
Max.
Operating Temp. (°C)
50
Surface Hardness
RM30
Elongation at Break
2.5 %
Density
1.08 g/㎤
Why Choose HIPS Injection Molding?
HIPS offers a unique combination of properties that make it ideal for manufacturing durable and lightweight products:
Impact Resistance
HIPS is engineered to withstand mechanical stress, making it suitable for products that require durability.
Ease of Processing
Its excellent flow properties allow for intricate designs and complex geometries with high precision.
Cost-Effective
HIPS is an affordable material that doesn’t compromise on quality, making it a budget-friendly option for large-scale production.
Surface Finish
HIPS can be easily painted, printed, or laminated, offering flexibility in aesthetics and branding.
Recyclability
As a thermoplastic, HIPS is recyclable, aligning with sustainable manufacturing practices.
Applications of HIPS Injection Molding
HIPS is widely used across various industries due to its versatility and performance:
HIPS Injection Molding Material Properties
HIPS Plastic Properties
Value
Tensile Strength (Yield) （MPa）
19.3
Flexural Modulus（GPa）
2.1
Notched Izod (kJ/m)
0.1
Maximum Service Temperature（℃）
60.0 - 80
Linear Expansion (/°C x 10-5)
7
Water Absorption (%)
0.2
Oxygen Index (%)
18
Flammability UL94
HB
Drying Time（hr）
1
Mold Temperature（℃）
30～75
Melt Temperature（℃）
175～230
Injection Pressure（MPa）
60～110
Injection Speed（ mm/sec）
Medium
Cooling Time（S）
10～80
Scrap Quantity（mm）
4～10
Back Pressure（MPa）
5～10
Clamping Force（ton/in2）
2
Return Speed (rpm)
60～100
Shrinkage
0.4% and 0.7%
HIPS Injection Molding Design Guide
Wall Thickness
- Optimal Range: 1.5–3.0 mm (0.06–0.12 inches).
- Uniformity: Maintain consistent wall thickness to avoid warping, sink marks, or uneven cooling.
- Ribs and Bosses: Use ribs to strengthen thin walls and bosses for screw inserts, but keep their thickness 50–60% of the adjacent wall to prevent sink marks.
Draft Angles
- Recommended: 1–2° per side.
- Purpose: Draft angles facilitate easy ejection from the mold and reduce the risk of surface defects.
Radii and Corners
- Edge Radii: Use radii of at least 0.5–1.0 mm (0.02–0.04 inches) to reduce stress concentrations and improve flow.
- Sharp Corners: Avoid sharp corners, as they can lead to stress cracking and poor material flow.
Gate Design
- Gate Location: Place gates at the thickest section of the part to ensure proper filling and minimize weld lines.
- Gate Type: Use edge, fan, or tab gates for HIPS, depending on the part geometry and size.
Shrinkage
- Shrinkage Rate: HIPS typically shrinks 0.4–0.7%.
- Compensation: Account for shrinkage in the mold design to ensure dimensional accuracy.
Draft Angle
For ABS parts, 1 – 2° draft angle for ≤ 50mm depth, 2 – 3° for deeper ones. Apply to all vertical surfaces parallel to mold opening.
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