What is Overmolding?
Overmolding is a manufacturing process in which a substrate or base component is covered or encapsulated with a second material, usually a thermoplastic elastomer (TPE), to create a composite product. It involves injecting the second material onto or around the first component, bonding them together to form a single integrated part. Skilled professionals like those at HordRT offer swift and precise over-molding services to assist you in designing your project
The Over-molding Process
- First, the substrate material is prepared and placed into a mold.
- Then, the overmolding material is injected or molded over the substrate material.
- The two materials are bonded during the molding process, creating a strong and durable bond between them.
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Rules of Overmolding Design and Production
Rules of Overmolding Design and Production
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- The best bonding is generally achieved when wall thicknesses are within the range of 0.060" to 0.120" (1.5 mm-3 mm).
- To minimize localized stresses, it is recommended to maintain radii of at least 0.020" or 0.5mm in corners.
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- If thick thermoplastic elastomer sections are necessary for the part, it is advisable to core them out to minimize shrinkage problems, reduce part weight, and lower cycle time.
- It is recommended to avoid deep and blind pockets or ribs in your design.
- To prevent flow issues such as backfills and gas traps, gradual transitions between wall thickness should be used.
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- To avoid warpage, especially for flat or long parts, the thermoplastic elastomer/thermoplastics vulcanizates should be less thick than the substrate.
- Overmolding requires mechanical or chemical bonding to the substrate. Therefore, the choice of overmolding materials should allow for this.
Applications of Overmolding
Applications of Overmolding
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Get the Perfect Parts with HordRT Overmolding Services
Work with a professional overmolding manufacturer like HordRT.
Get the Perfect Parts with HordRT Overmolding Services
Work with a professional overmolding manufacturer like HordRT.
- 20+ years of experience
- 24 hours Instant Quoting
- NO MOQ required
- ISO9001 & IATF 16949 certificated quality
- Quick turnaround
- DFM analysis
Over-molding FAQs
The benefits of overmolding include enhanced functionality, improved aesthetics, increased durability, improved ergonomics, better sealing and waterproofing, simplified assembly, and customization opportunities.
Common materials used in overmolding include rigid plastics (such as ABS or polycarbonate) as the base material and flexible or elastomeric materials (such as TPE or silicone) as the overmolded material.
Design considerations for overmolding include material compatibility, part geometry, bonding between materials, proper gating and venting, and the specific requirements of the end-use application.
The cost implications of overmolding can vary depending on factors such as material selection, part complexity, tooling requirements, and production volume. Generally, overmolding can add complexity and cost to the manufacturing process compared to traditional molding techniques.
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A Brief Overview of Anodizing, Powder Coating, and Painting
When it comes to finishing techniques for metal surfaces, anodizing, powder coating, and painting are three of the most popular methods. Each of these processes offers unique benefits and is suitable for different applications. This article provides a brief overview of these three techniques, outlining their processes, advantages, and typical uses.
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Exploring the Versatility of HDPE Injection Molding: Processes, Benefits, Drawbacks, and Applications
High-Density Polyethylene (HDPE) is a versatile thermoplastic known for its durability, strength, and chemical resistance. These qualities make it a preferred material for injection molding across a wide range of industries, from packaging to automotive components. This article explores the intricacies of HDPE injection molding, highlighting its processes, benefits, drawbacks, and diverse applications.
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What Is The Difference Between CNC Routers And CNC Mills
In the realm of computer numercial control (CNC) machining, CNC routers and CNC mills are two of the most commonly used machines. Both are essential for various manufacturing processes, but they serve different purposes and are designed for different applications. Understanding the distinctions between the two can help manufacturers select the right tool for their specific needs.
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