Fox mold
All-round LSR Injection Molding Manufacturer
Fox Mold is the world’s leading manufacturer of liquid silicone rubber injection molded products. As an expert in injection molding technology, we have the right tools and skills to create products according to your unique requirements at a short lead time. We complement this with a range of services to make your sourcing experience smooth and seamless.
- +/-0.01MM Tolerance
- Short lead time as fast as 2 weeks
- No MOQ requirements
- ISO 9001: 2015; ISO 14001: 2015;
- Parts with high performance in durability and accuracy
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Our One-Stop Services
Fox Mold goes beyond the mold of traditional plastic injection molding manufacturers by offering an array of services.
With our years of production expertise, we can quickly transition from concept to practical samples ideal for testing and small-batch manufacturing.
We help design craft specific tools to streamline the injection molding process, including cooling systems, gates and runners, and ejection mechanisms.
Expert engineers help design and create dedicated molds with tight tolerances and detailed configurations to ensure the accuracy of each injection-molded part.
The cost-effective plastic injection molding process produces highly durable and consistent plastic parts with tight tolerances.
Fox Mold’s overmolding process creates sophisticated plastic parts with multiple layers for added functionality and detail.
Efficiently produce plastic molded parts with metal inserts that add durability and functionality while staying cost-effective.
How Does It Work
Witness the expertise of Fox Mold in manufacturing custom LSR injection molded parts.
Material Mixing
- Pre-treatment: Before use, the material must be brought back to room temperature to prevent uneven mixing or bubble formation due to temperature differences.
- Metering and Mixing: The A and B components are mixed in precise ratios to ensure proper reactions. The stirring and mixing processes must also avoid generating air bubbles to prevent affecting the quality of the product.
- Equipment Requirements: High-precision metering pumps and static/dynamic mixing heads are used to avoid cross-contamination.
Injection
- Low Pressure Injection: Load the finished mold into the LSR injection molding machine, which is used to precisely control injection. Due to the low viscosity of LSR, the injection pressure is relatively low, typically 10-20 MPa, to avoid flash.
Curing & Vulcanization
- Thermal Curing: At high mold temperatures, LSR completes the crosslinking reaction in seconds to minutes, e.g. about 30 seconds at 170°C.
- Post-curing: Some products require post-curing, e.g. at 200°C for 1-2 hours, to improve performance such as chemical resistance and elasticity.
- Real-time monitoring: Sensors provide precise temperature and time control to prevent under or over curing.
Cooling and Ejection
- Rapid cooling: After ejection, natural cooling or water cooling is used to reduce cycle time.
- Automated ejection: Robotic arms are used for part removal whenever possible to reduce human contact and ensure product consistency.
- Mold maintenance: The mold cavity is cleaned regularly to prevent silicone residue from affecting surface quality.
Secondary Operations
- Deburring: -40°C freeze to brittle, then hand trim or freeze deburr.
- Cleaning and Coating: Medical grade products require plasma cleaning or application of antibacterial coating.
- Assembly and Packaging: Integration with other components, such as combining seals with metal parts.
Inspection
- Dimensional inspection: Verify tolerances.
- Physical Testing: Includes tensile strength, tear strength, Shore A hardness, etc.
Surface Finishing Options
To enhance the visual appeal and durability of your LSR injection molded parts, Fox Mold offers a range of SPI and VDI surface finishing options. Whether you want a rough and textured finish or a smooth, glass-like appearance, trust our expertise to get the task done.
Plastic Material Options
We can help you improve the quality and performance of your LSR injection molded products by customizing the materials we use. We carry an inventory of LSR raw materials in various grades and hardnesses, and with high heat and vibration resistance to meet your project needs.
Two-component liquid silicone rubber (LSR) must be stored at low temperatures, away from light and contamination. We store all LSR materials in a low temperature environment of 5-25°C to maintain their quality and carefully inspect them for consistency upon receipt.
We can also provide raw material inspection certificates for expiration date, viscosity, and batch consistency upon request.
LSR Injection Molding for Various Markets
See how our manufacturing expertise in LSR injection molding has produced an assortment of plastic parts with diverse applications.
FAQ
What’s injection molding?
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Factors Contributing to Improve the Parts Quality
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What are the typical tolerances for injection molded parts?
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How much does your injection molding service cost?
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