China Suppliers Factory for Triangular Lamp Shade Injection Mold - 718 Steel Design
The core components of this mold (cavity and core) are made of 718 pre-hardened plastic mold steel. This steel typically has a factory hardness between 28-35 HRC, offering excellent polishing performance, wear resistance, and dimensional stability, making it ideal for manufacturing high-precision plastic products with stringent surface finish requirements. The mold base is made of 45# high-quality carbon structural steel, which, after heat treatment, exhibits excellent comprehensive mechanical properties and is commonly used in manufacturing support structures within molds.
◎ 718 steel has excellent mirror polishing performance, which can ensure the smoothness and optical quality of the lampshade surface.
◎ The pre-hardening properties of 718 steel prevent deformation during heat treatment and improve the long-term stability of the mold.
◎ The water-cooling system design helps to shorten the injection molding cycle and improve production efficiency.
◎ The combination of pin ejectors and ejector plates ensures smooth and stable demolding of lampshade products.
🔍 This mold is particularly suitable for the mass production of automotive lighting fixtures (such as triangular headlight covers) or high-precision lighting equipment. The excellent properties of 718 steel enable it to meet the manufacturing requirements of plastic parts with high demands for surface finish, dimensional accuracy, and mass production life.
| Cavity material | 718 steel |
| Core material | 718 steel |
| Mould base material | 45# |
| Ejection system | Pin ejector and ejection plate |
| Number of cavity | 2 cavities (right + left) |
| Gate | Hot runner system + Normal side gate |
| Cooling system | By water |
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Both the cavity and core are made of 718 pre-hardened plastic mold steel, which offers a factory hardness of 28–35 HRC, excellent polishing performance, and outstanding dimensional stability for high-precision applications.
718 steel is preferred because of its superior mirror polishing capability, resistance to deformation during heat treatment, and long-term stability — all critical for producing lampshades with high surface finish and optical quality requirements.
The mold uses a water-cooling system that circulates coolant through internal channels to rapidly reduce mold temperature after each injection cycle. This shortens the overall cycle time and significantly improves production efficiency.
This mold uses a combined ejection system consisting of pin ejectors and ejector plates, which work together to ensure smooth, stable, and reliable demolding of lampshade products without surface damage.
This mold is best suited for mass production of automotive lighting fixtures such as triangular headlight covers, as well as high-precision lighting equipment that demands strict surface finish, dimensional accuracy, and extended production life.
The mold uses a hot runner system combined with a normal side gate. The hot runner system reduces material waste and improves cycle efficiency, while the side gate provides precise control over the plastic flow into the cavity for consistent part quality.