Bost Custom Over Molding Solutions for Advanced Engineering Plastics

Bost Custom Over Molding Solutions

Why Choose Bost for Custom Over Molding

Bost is a professional, innovative and green high-tech manufacturer focused on custom over molding of engineering plastics. With award-winning expertise in polymer modification and product mold design, Bost transforms design concepts into reliable, production-ready parts that meet demanding performance and aesthetic requirements.

Advanced Materials & Special Properties

Bost specializes in specialty engineering plastics with exceptional properties — ultra-high anti-scar, super corrosion resistance, exceptional fatigue durability, ultra-abrasion resistance, high-temperature transparency, enhanced toughness, flame retardance, conductivity and thermal management. These materials are optimized for custom over molding to deliver durable bonds, precise tolerances and long service life in harsh environments.

Precision R&D and Manufacturing Capability

Our in-house R&D team and production engineers excel in plastics modification, mold design, mechanical processing and steel-plastic integration. Bost provides end-to-end services from material selection and sample prototyping to high-volume injection overmolding, ensuring consistent quality and fast time-to-market for customer-specific custom over molding projects.

Applications Across Industries

Bost’s custom over molding solutions serve automotive, industrial, electronics, renewable energy, medical devices and consumer goods sectors. Whether you need sound-dampening seals, protective overmolds for connectors, ergonomic grips or composite steel-plastic assemblies, our tailored materials and process control deliver superior performance.

Quality, Sustainability and Customer Support

Quality assurance, green manufacturing practices and responsive technical support are core to Bost’s promise. We combine rigorous testing, durable material formulations and efficient production to ensure customer satisfaction. Partner with Bost for custom over molding expertise that balances innovation, sustainability and scalable manufacturing.

custom over molding Display

FAQ:

What is the minimum order quantity (MOQ)? Do you support small-batch trial production?

The MOQ for standard products is ≥100kg. We support small-batch trial production (as low as 20kg) and provide mold testing reports and performance data feedback.

Can Bost customize modified plastics with special properties?

Yes! We offer modification services such as reinforcement, flame retardancy, conductivity, wear resistance, and UV resistance, for example:
• Adding carbon fiber to enhance stiffness
• Reducing the coefficient of friction through PTFE modification
• Customizing food-grade or medical-grade certified materials

What is the delivery lead time? Do you offer global logistics?

Standard products: 5–15 working days; custom modifications: 2–4 weeks. We support global air/sea freight and provide export customs clearance documents (including REACH/UL certifications).

How do I select the appropriate engineering plastic grade for my product?

Selection should be based on parameters such as load conditions (e.g., pressure/friction), temperature range, medium contact (e.g., oil/acid), and regulatory requirements (e.g., FDA/RoHS). Our engineers can provide free material selection consulting and sample testing.

What are the core advantages of Bost engineering plastics compared to ordinary plastics?

Bost engineering plastics feature ultra-high mechanical strength, high-temperature resistance (-50°C to 300°C), chemical corrosion resistance, and wear resistance. Compared to ordinary plastics, their service life is extended by 3 to 8 times, making them suitable for replacing metals in harsh environments.

PP plastic spacer by injection molding

Machined plastic insulator with white PTFE material

The PVDF cover with screws by injection molding

Color PTFE sleeve for shaft application

PTFE seals with good lubricate properties

The clear screen made of high polished polycarbonate

The over mold with clear polycarbonate and black TPE

Top Selling Products

PP plastic spacer by injection molding

Machined plastic insulator with white PTFE material

The PVDF cover with screws by injection molding

Color PTFE sleeve for shaft application

PTFE seals with good lubricate properties

The clear screen made of high polished polycarbonate

The over mold with clear polycarbonate and black TPE

The black POM spacer made by injection molding

The plug made by insert mold blue nylon 66 with brass nut

Oil resistance NBR Buna-rubber seal ring

The PTFE sealing made by machined

The injection molding Nylon 66 washer

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