Boxin · Hengzhen · Botrust
Precision Manufacturing・Powering the World
MIM
This component is a stainless steel stepped shaft seat/fluid control valve core manufactured via MIM (Metal Injection Molding). It features an integral one-piece design that combines a stepped shaft section, a square base, and lateral through-holes into a single unit. With high dimensional accuracy and excellent structural strength, it also offers both corrosion resistance and wear resistance. It can serve as a fluid‑control valve element, a transmission‑connection part, or an installation base, and is widely used in pneumatic systems, home‑appliance control modules, and small industrial equipment to enable media flow, positioning and mounting, and motion‑control functions.
- Product Description
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I. Basic Product Information
- Product Name : MIM stainless steel stepped shaft housing (fluid valve components / transmission connectors)
- Manufacturing process Metal Injection Molding (MIM)
- Material : Stainless steel (customizable materials include alloy steel, iron-based alloys, etc.)
- Core Use : Serving as valve spools and seats in fluid valve assemblies, transmission connectors or mounting bases for compact devices, these components are employed in pneumatic control systems, household appliance fluid modules, and small industrial machinery to enable media flow, motion control, and precise installation.
II. Structure and Process Details
- Appearance and Structural Features
- The assembly features an integrally formed stepped composite structure, comprising a stepped shaft section at the top, an intermediate transition shoulder, and a square base at the bottom. The individual shaft sections exhibit high coaxiality, enabling direct mating with bushings and sealing rings to achieve either sliding or rotary fits.
- The square base features large-diameter through-holes on its sides, which intersect with the upper shaft section to form a cross‑channel structure, enabling fluid flow to be routed, redirected, or shut off. The inner walls of the flow passages are smooth and free of burrs, minimizing flow resistance.
- The shaft section transitions smoothly into the base, with no sharp edges or burrs, thereby preventing assembly‑induced scratches while enhancing structural integrity and reducing stress concentrations, making it well suited for high‑frequency operating conditions.
- MIM Process Advantages Are Evident
- One‑step forming of complex structures: Multi‑feature components such as stepped shafts, square bases, and lateral through‑holes require no secondary machining; they are directly molded, achieving dimensional accuracy within ±0.05 mm, with high batch-to‑batch consistency and eliminating the need for additional trimming or fitting.
- Outstanding material performance: The stainless steel, after sintering, exhibits high density with no porosity or shrinkage defects. Following heat treatment, it achieves a uniform hardness distribution, combining the wear resistance of the shaft section with the impact resistance of the base, making it well-suited for applications involving frequent motion.
- Strong surface‑state compatibility: The matte‑finish surface reduces sliding friction while enhancing corrosion resistance, and can be further treated—such as polishing or nickel plating—to meet the demands of food‑contact applications or high‑cleanliness environments.
- Cost and Efficiency Advantages: Near-net-shape manufacturing significantly reduces subsequent machining, achieves high material utilization, is well-suited for mass production, and effectively lowers per-unit costs.
- Performance Features
- High structural strength: The monolithic, integrally molded structure features no welded joints, ensuring uniform load distribution and enabling it to withstand axial loads and lateral impacts. It remains resistant to deformation and fracture even under prolonged use.
- Transmission / Motion Stability: The stepped shaft sections exhibit high coaxiality, with uniform clearances to mating components, ensuring smooth sliding and rotation without binding or sticking, thereby accommodating the frequent on/off operations of the associated valve.
- Excellent corrosion resistance: The stainless steel construction is compatible with a wide range of fluid media, including water, compressed air, and mildly corrosive substances. It resists rusting and oxidation over long-term use, resulting in low maintenance costs.
- Wide installation versatility: The square base can be directly embedded into the equipment housing for secure positioning, eliminating the need for additional brackets. The dimensions of the lateral through-holes and the shaft‑section diameters can be customized to meet specific customer requirements, ensuring compatibility with diverse equipment installation spaces and functional needs.
III. Application Scenarios
It is widely used in applications such as small pneumatic valve components, household appliance fluid‑control systems (e.g., coffee machines and water‑heater valve assemblies), transmission and coupling parts for small industrial machinery, and mounting bases for precision instruments. It is particularly well suited to fluid‑control and mechanical‑transmission fields that demand high levels of part‑geometry complexity, dimensional accuracy, wear resistance, and corrosion resistance.
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