Sealing Push-In Caps For Engine And Motor Cylinders
JD-010-0001
We can customize the products according to your drawings. We can make carbon steel and stainless steel products. The surface treatment can be galvanized, zinc-nickel alloy plated, cleaned and degreased.
1. Core Functions and Application Scenarios
Sealing and Heat Dissipation: Bowl-shaped plugs are primarily used for sealing engine/motor cylinder water jackets, process holes, and heat dissipation channels, requiring both sealing and leak-proofing.
Typical Applications: Engine cylinder block/cylinder head water jackets, engine cooling system sealing, and hydraulic/pneumatic system piping plugging.
2. Material Selection:
Carbon Steel: High strength and high temperature resistance, suitable for high-pressure/high-load applications (such as high-performance engines).
Stainless Steel: Corrosion-resistant and heat-resistant, suitable for corrosive environments such as chemical and food processing.
3. Processing Technology:
Stamping: Achieves high-precision conical surface forming, high efficiency, and is suitable for high-volume production.
Surface Treatment: Galvanized or zinc-nickel plating for corrosion resistance.
4. Quality Control: Full-Process Precision and Performance Verification
Dimensional Accuracy: outer diameter tolerance band of 0.08mm. Surface finish must meet sealing surface requirements (e.g., Rz 1.6 or below).
Sealing Performance: Leak-proof verified through pressure tests (such as water/air pressure seal tests). Anaerobic adhesives (such as Boson 3662T) are applied with a 2.5mm application width to enhance sealing performance.
Testing Methods: Dimensions are measured using a three-dimensional coordinate measuring machine, material composition is verified through spectral analysis, and heat-treated structures are observed using a metallographic microscope.
5. Design Optimization: A Key Path to Performance Improvement
Structural Optimization
Tapered Surface Design: A 1:20 taper ensures self-locking after press-fitting, reducing the risk of fallout.
Interference Fit: A 0.02-0.05mm interference fit ensures connection strength while avoiding stress concentration.
