China Wholesale Valve Disc Manufacturers - Chinna factory of shock absorber powder Metallurgy parts piston , base valve , rod guide – Max

Max Auto Parts ltd is China top 2 manufacturers in Shock absorber , shock struts industrial .

The Sintered parts piston , base valve and rod guide play important role in shock absorber ,

It is not a secret that in the past some China factories not care about the quality , that caused many problem , in this situation , our factory by improve technical , changing the machines , the precision and quality have achieve the world top shock absorber manufacturer’s approve , like Bilstein ,  VW .

Now our factory have got the IATF TS16949 certificate .

Our factory located in China , Ningbo City .

Here is some video of our factory production line .

1.Piston, bottom valve, rod guide made by powder metallurgy technology.Using fe-c-cu powder, the mould is pressed, sintered and machined.
2.Product 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.

3.Specification :

4.Production Facilities

模具设备

Examination Facilities