Product Series
Because of focus, it is professional!
Valve pin
Specializing in hot runner valve pins, valve pin sleeves; standard and non-standard mold parts; non-standard automation
Mechanical parts; tooling fixtures and other production and sales.
Valve sleeve
Specializing in hot runner valve pins, valve pin sleeves; standard and non-standard mold parts; non-standard automation
Mechanical parts; tooling fixtures and other production and sales.
SINCE 2013
Dongguan Rewin Seiko Technology Co., Ltd
Precision Hot Runner Core Component Manufacturer | ±0.001mm Tolerance Expert | 15 Years Original Factory
Dongguan Rewin Seiko Technology Co., Ltd was established in 2013, focusing on the R&D and manufacturing of core precision components for hot runner systems, providing ultra-durable valve pins and zero-leakage valve sleeve solutions for the global injection molding industry. With a fully autonomous production base (Guangdong), we achieve closed-loop production from high-speed steel rods → five-axis precision grinding → PVD coating → intelligent inspection, with an annual output exceeding 500,000 pieces.
15 Years Focus on Hot Runner Valve Pins
Factory Area
Global Cooperative Clients
Excellent Equipment to Ensure Product Quality
Highly values independent technology R&D, talent cultivation, equipped with a professional technology R&D center, established a modern equipment production workshop, and continuously optimizes production processes in real time
Roundness Checking Machine
Roundness Checking Machine
Centerless Grinder
Broaching Machine
Surface Grinder
Win-Win Cooperation
Innovation and Win-Win Cooperation
Trusted Brand Choice
The company will continue to increase technological innovation efforts, launch more high-performance and highly reliable valve pin and valve sleeve products; strengthen communication and cooperation with customers, deeply understand customer needs, provide more personalized solutions; continuously improve after-sales service system, and enhance customer satisfaction
News Center
Blog
The new valve needle can reduce the breakage rate of long glass fibers
08-08
2025
08
/08/2025
Blog
Displacement accuracy control of the valve needle
The valve needle uses a plug-in installation structure linked with a lever drive mechanism, achieving millimeter-level displacement precision control through the extension and retraction of the pressure cylinder piston rod. Its conical surface taper angle is designed between 45° and 75°, with the tip diameter 4% larger than the valve body discharge end to achieve dynamic sealing.
08
/08/2025
Blog
Material and Surface Treatment of Valve Needle
The valve needle body is usually made of high-hardness steel, such as 4140 alloy steel or 1Cr13 stainless steel, with a yield strength of over 850MPa. The surface is nitrided to enhance wear resistance, and some high-end models use CrAlN coating, reducing the friction coefficient to below 0.15.
08
/08/2025
Blog
The installation position of the valve sleeve affects accuracy
In hot runner systems, the valve bushing is usually installed on the manifold or above the hot nozzle, but both positions are close to high-temperature plastic, which easily causes thermal expansion and increases dimensions, leading to valve bushing displacement and inner hole deformation, affecting the valve pin movement accuracy. The patented technology of Changsha Best Hot Runner Technology Co., Ltd. places the valve bushing directly above the nozzle core, which can reduce deformation caused by excessive temperature.
Address: No. 20 Xinle Road, Jiangbei, Wusha, Chang'an Town, Dongguan City
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