- Description
- Inquiry
Piston, bottom valve, rod guide made by powder metallurgy technology.Using fe-c-cu powder, the mould is pressed, sintered and machined.
Piston Features:
The piston and the bottom valve mainly provide damping for the shock absorber ,rod guide mainly guide for the movement of piston rod.
Technological process: mixing powder – forming – sintering – cleaning -Steam treatment – Bending-Press bushing-Appearance inspection, packing
Mixing powder: Fe – C – Cu powder by high density sieve to remove impurities, automatic blending machine 360 ° rotating more than 4 hours, make the material mix evenly
Molding: precision mould with automatic CNC hydraulic press to ensure the density of all parts meet the process requirements after pressing.
Sintering: the product is controlled by the net belt type sintering furnace, which ensures the mechanical properties and hardness of the products to meet the technical requirements.
Oil immersion: place the product in a high pressure vessel so that the oil can fully penetrate into the product’s pores and avoid the rust of the later cycle.
Plastic: precision mould with full automatic CNC hydraulic press, the product density and mechanical properties are further improved after pressing, and the dimensions meet the requirements of the drawing.
Machining: finish the hole, groove and other details of the product.
Cleaning: the mesh belt adopts ultrasonic cleaning machine to remove impurities and iron filings.
Steam treatment: the product is treated by steam in the electric furnace, which improves the mechanical properties of the product, and the surface oxidation layer helps to prevent rust.
Packing: the piston is covered by a fully automatic numerical control machine covering the PTFE lubrication belt.
Press bushing: pressed into DU bushing.
Appearance inspection, packing.
Piston Specification
| Product Details | ||
| Product Name | Powder Metal Sintered Part for Shock Absorber | |
| Material | (MPIF 35) FC-0205 (DIN 30910-4) Sint C10, Fe, Balance, Cu 1.5-3.9%, C 0.3-0.6% | |
| Density | 6.4-6.9 g/cm3 after steam oxidation | |
| Hardness | 60-115 HRB, loading 1 kN, diameter of ball 1/16″ | |
| Surface Treatment | Steam oxidation, 2 hours, Fe3O4: 0.004-0.005mm, degree of oxidation 2-4% | |
| Unspecified Tolerance | ISO 2768 – m / H14, h14, +- IT14/2 | |
| Apperance | No crumbling, cracks, exfoliation, voids, looseness, metal pitting and other defects | |
| Process Flow | Powder mixing – Forming – Sintering – Oil impregnation – Sizing – Ultrasonic cleaning – Steam oxidation – Oil impregnation – Final inspection – (+ DP4 bushing / +PTFE band) Packing |
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| Application | For automobile, motorcycle and bicycle shock absorber | |
| Our Advantages: | 1. More than current 3000 moulds ,save your mold cost 2. ISO/TS 16949:2009 certificate 3.Competitive price 4.Strictly quality control capacity of APQP、FEMA、MSA、PPAP、SPC |
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Production Facilities
Examination Facilities
