Recent Posts
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![Meet TYM at K 2025 -The World’ s No.1 Trade Fair for Plastics and Rubber]()
Meet TYM at K 2025 -The World’ s No.1 Trade Fair for Plastics and RubberWelcome to the World’s No.1 Trade Fair for Plastics and Rubber -K 2025, taking place from October 8–15, 2025 at Messe Düsseldorf, Germany. As a professional LSR injection molding machine, mold, and robot solution provider, TYM Technology Co., Ltd. is proud to present our latest innovations at Booth 16E77.
09/23/2025
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![How Automated Material Feeding Improves LSR Manufacturing Efficiency]()
How Automated Material Feeding Improves LSR Manufacturing EfficiencyAs labor costs continue to rise and quality requirements become stricter, manufacturers are increasingly adopting automated material feeding systems in liquid silicone rubber production.
06/09/2026
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![How Does Vacuum Assistance Improve LSR Injection Molding Quality?]()
How Does Vacuum Assistance Improve LSR Injection Molding Quality?In liquid silicone rubber (LSR) manufacturing, product quality is heavily influenced by how effectively air is removed from the mold cavity. Trapped air can lead to bubbles, incomplete filling, surface defects, and reduced product consistency.
06/08/2026
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![Why Is Shot Size Accuracy Important in Liquid Silicone Rubber Molding?]()
Why Is Shot Size Accuracy Important in Liquid Silicone Rubber Molding?Precision is one of the key advantages of liquid silicone rubber molding. However, achieving consistent product quality depends heavily on accurate shot size control.
06/08/2026
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![How Clamp Force Selection Affects LSR Injection Molding Performance]()
How Clamp Force Selection Affects LSR Injection Molding PerformanceClamping force is one of the most fundamental parameters in liquid silicone rubber injection molding. While many manufacturers focus heavily on injection pressure, metering accuracy, and mold design, the selection of proper clamp force directly influences product quality, mold lifespan, process stability, and overall production efficiency.
06/03/2026
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![How Closed-Loop Injection Control Improves LSR Molding Stability]()
How Closed-Loop Injection Control Improves LSR Molding StabilityAdvanced manufacturing systems are now integrating digital monitoring, servo-driven motion control, and intelligent process optimization to reduce variability during molding cycles.
05/29/2026
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![Energy Consumption Optimization in Modern LSR Injection Molding Machines]()
Energy Consumption Optimization in Modern LSR Injection Molding MachinesAs manufacturing industries move toward sustainable and cost-efficient production models, energy optimization has become an increasingly important factor in liquid silicone rubber injection molding.
05/28/2026
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![LSR Injection Machine Guide: How Proper Maintenance Extends Injection Machine Lifespan]()
LSR Injection Machine Guide: How Proper Maintenance Extends Injection Machine LifespanLiquid silicone rubber injection molding machines operate under highly specialized production conditions that require long-term precision, thermal stability, and continuous mechanical reliability.
05/19/2026
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![What Are the Advantages of Integrated Horizontal Injection Molding Machines?]()
What Are the Advantages of Integrated Horizontal Injection Molding Machines?Integrated horizontal injection molding machines have become increasingly important in modern liquid silicone rubber manufacturing due to their ability to combine automation, precision, and production efficiency into a single system architecture.
05/18/2026
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![High-Precision Liquid Silicone Rubber Injection Molding: How to Achieve Micron-Level Tolerance Control]()
High-Precision Liquid Silicone Rubber Injection Molding: How to Achieve Micron-Level Tolerance ControlAs medical devices, wearable electronics, automotive sealing systems, and micro silicone components continue evolving toward miniaturization and precision manufacturing, micron-level dimensional control has become increasingly important in Liquid Silicone Rubber injection molding.
05/15/2026
The Effect of Regrind Material Ratios on Processing Speed
Regrind, or recycled sprues, runners, and rejected parts, is commonly reintroduced into the virgin material stream to reduce waste and material costs in injection molding. While economically beneficial, the proportion of regrind used can influence processing speed. Regrind particles often have a different shape (more irregular) and potentially altered molecular weight compared to virgin pellets due to thermal history during initial processing. This can affect how the material flows and packs in the barrel and mold, potentially requiring adjustments that impact cycle time.
High regrind ratios can lead to variations in melt viscosity and flow characteristics. This inconsistency makes it harder to establish a stable, optimized process. To compensate for potential flow variations, processors might need to reduce injection speeds or increase back pressure to ensure proper mixing and homogenization. This conservative approach, while ensuring quality, inevitably slows down the overall process. Additionally, regrind can contain more air or volatiles, necessitating more rigorous drying or venting, which can add time to the preparation or cycle phases.
Degradation is another concern. Each reprocessing cycle subjects the polymer to heat and shear, which can lead to chain scission and a reduction in molecular weight. Lower molecular weight material tends to have a higher Melt Flow Rate (MFR) and flows more easily, which might seem beneficial for speed. However, it often results in poorer mechanical properties and increased shrinkage, potentially leading to quality issues that require slower, more controlled processing or longer cooling times to compensate.
To mitigate these effects and maintain speed, it's crucial to carefully control the amount and quality of regrind used. Limiting regrind to a specific percentage (often 10-25%, depending on the material and part requirements) helps maintain consistency. Blending regrind thoroughly with virgin material and ensuring it's properly dried are essential practices. Some processors use dedicated dosing units for precise regrind introduction. By managing regrind usage effectively, manufacturers can reap its economic benefits without significantly compromising processing speed or part quality.