Hei-Cast 8752 High Temp Vacuum Casting Services

Hei-Cast 8752 Vacuum Casting Material

Hei-Cast 8752 is a high-performance polyurethane resin developed to simulate the thermal and mechanical characteristics of PBT (Polybutylene Terephthalate) or heat-stabilized ABS. When standard prototyping resins fail under thermal stress, Hei-Cast 8752 excels. It is distinguished by its high heat deflection temperature and exceptional structural rigidity. At JUCHENG, we utilize this material for functional prototypes that must operate in high-temperature environments, making it ideal for under-hood automotive components, electrical housings, and industrial parts requiring long-term thermal stability.

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Hei-Cast 8752

Grundlegende Eigenschaften & Zusammensetzung

Hei-Cast 8752 is a two-component system engineered for structural performance in heated conditions.

High Temperature Resistance: It maintains its shape and stiffness at elevated temperatures (HDT approx. 115°C), where standard resins would warp or soften.
PBT/ABS Simulation: It mimics the rigidity, hardness, and heat resistance of production-grade engineering thermoplastics.
High Rigidity: Possesses a high flexural modulus, making it suitable for structural parts that must resist bending under load.

Oberflächenbeschaffenheit: Cures to a smooth, hard surface that can be easily painted or textured.

Color Options

Standard: Beige / Light Brown.
Lackieren: Its neutral base color and hard surface make it an excellent substrate for high-quality paint finishes, including metallic and gloss coatings. JUCHENG recommends painting for the best aesthetic results.

Wichtige technische Parameter

1.Mechanical Properties (Typical values):

Eigenschaft	Wert	Einheit	Standard
Hardness	80 - 85	Shore D	JIS K 7215
Biegemodul	2,200 - 2,400	MPa	JIS K 7171
Zugfestigkeit	60 - 70	MPa	JIS K 7113
Bruchdehnung	5 - 10	%	JIS K 7113
Heat Deflection Temp (HDT)	110 - 115	°C	JIS K 7191
Schlagzähigkeit (Izod)	3 - 5	kJ/m²	JIS K 7110
Linear Shrinkage	0.3 - 0.4	%	-

2. PROCESSING

Vakuumguss: Requires a high-quality vacuum process to ensure a dense, bubble-free part, which is critical for thermal performance.
Pot Life: Approx. 8-10 minutes.
Demolding: 60 minutes at 70°C.
Post-Curing: A multi-stage thermal post-cure is mandatory to achieve the rated heat deflection temperature. JUCHENG follows strict curing profiles to maximize performance.

3. PRECAUTIONS:

Sprödigkeit: Like most high-temp resins, it is more brittle than PP-like simulants. Sharp corners should be avoided in the design.
Moisture: Sensitive to humidity before casting.

4. STORAGE:
Conditions: Store in a dry, cool place away from sunlight.

Application Scenarios & Fields

Hei-Cast 8752 is essential for thermal validation prototypes:

Automobil: Under-hood components (engine covers, air boxes), HVAC housings, lighting bezels.
Household Appliances: Coffee machine internal structures, toaster housings, hairdryer components.
Industrie: Pump housings handling warm fluids, motor casings, electrical switchgear.

Elektronik: Power supply casings, projector lamp housings.

Vacuum Casting Process Compatibility

Silicone Tooling: Compatible with standard silicone molds.
Machining: Cured parts are hard and machine cleanly. They can be drilled, tapped, and CNC trimmed.
Inserts: Excellent for casting in metal threaded inserts due to its high rigidity.

Advantages vs. Limitations

Advantages	Limitations
High Heat Resistance: Stable up to ~115°C.	Impact Resistance: Lower impact strength compared to tough ABS or PP simulants.
High Rigidity: Excellent stiffness for structural parts.	Color: Limited to beige/brown in its natural state; requires painting for aesthetics.
Good Machinability: Cures to a hard, machinable solid.	Cost: Premium high-temp resin is more expensive than standard types.
Dimensional Stability: Low shrinkage ensures accuracy.

Manufacturers & Alternatives

Manufacturer: Hei-Cast (H&K Ltd., Japan).
Alternatives at JUCHENG:

For even higher heat resistance: We recommend Hei-Cast 8570.
For a black, high-temp option: We recommend Axson PX 223.
For a standard, non-heat resistant ABS simulant: We recommend Hei-Cast 3012.

Learn more about ABS type materials

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