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High Precision Surface Stainless Steel Welded Hydraulic Plunger for Injection Molding Machine

Forged hydraulic plunger is the core transmission component in hydraulic systems. It converts hydraulic energy into mechanical energy by reciprocating within the hydraulic cylinder, thereby achieving force transmission and motion control.
Availability:
Quantity:
  • FORGE-P-OD700*L2000

  • ETERNAL


Understanding


The High Precision Surface Stainless Steel Welded Hydraulic Plunger is a core transmission component engineered specifically for Injection Molding Machine hydraulic systems. Fabricated from high-grade alloy steel via advanced forging technology, this plunger serves as the backbone of hydraulic energy conversion—seamlessly transforming hydraulic energy into mechanical energy through smooth reciprocating motion within the hydraulic cylinder. Its design prioritizes force transmission accuracy and stable motion control, two critical factors for optimizing injection molding efficiency and product quality. What sets it apart is the integration of 2Cr13-4Cr13 stainless steel overlay welding and precision surface treatments, which equip it to withstand the high-pressure, repetitive workloads of industrial molding environments. As a reliable hydraulic plunger for injection equipment, it balances durability, precision, and adaptability, making it a top choice for manufacturers seeking to minimize downtime and enhance production consistency.


Injection Molding Machine Plunger


Technical Parameters


Parameter

Specification

Model

FORGE-P-OD700*L2000

Material

Premium Alloy Steel

Heat Treatment

Quenching and Tempering (Normalizing + Quenching + Tempering)

Surface Treatment

Surface Quenching, Electroplating, 2Cr13-4Cr13 Stainless Steel Overlay Welding

Surface Hardness

HRC50-60

Depth of Quenched Layer

2-4mm

Thickness of Electroplated Layer

20-50um

Production Capacity

500 tons per month

Transport Package

Sturdy Steel Pallet

Warranty Period

1 year

Customization Service

Available (size, surface treatment, hardness adjustment)


Features


Premium Alloy Steel Forging Base &  Precision Heat Treatment Process

Selected alloy steel forging material delivers exceptional high strength, high hardness, and superior wear resistance, enabling the plunger to endure continuous high-pressure cycles without deformation or premature wear.

The quenching and tempering process (combined with normalizing) ensures a uniform internal structure, enhancing mechanical stability and reducing the risk of fatigue failure during long-term operation.


Multi-Layer Surface Enhancement & CNC Machining & Ultra-Smooth Grinding

A triple surface treatment combination—surface quenching, electroplating, and 2Cr13-4Cr13 stainless steel overlay welding—boosts corrosion resistance, surface hardness, and wear resistance, extending service life in harsh molding environments.

Advanced CNC machining and precision surface grinding guarantee tight dimensional tolerances and a ultra-smooth finish, minimizing friction within the hydraulic cylinder and optimizing energy conversion efficiency.


Typical Uses


This High Precision Surface Stainless Steel Welded Hydraulic Plunger is primarily designed for Injection Molding Machine hydraulic cylinders, a critical application in industries such as automotive parts manufacturing, electronic component molding, and household appliance production. It is also compatible with hydraulic systems in plastic molding presses, precision forming machines, and hydraulic power units that demand high precision and load-bearing capacity. Whether used in mass production lines or custom manufacturing workshops, this plunger ensures consistent motion control, reduces equipment downtime, and directly contributes to higher product quality and production efficiency.


FAQ


Why choose alloy steel over ordinary steel for this plunger?

The alloy steel material offers a balanced combination of high strength, high hardness, and wear resistance that ordinary steel cannot match. It maintains structural integrity under repetitive high-pressure loads, reducing maintenance frequency and extending the plunger’s service life.


Can the plunger be customized to fit non-standard injection molding machines?

Yes, we provide comprehensive customization service. You can adjust parameters such as outer diameter, length, surface treatment type, and electroplated layer thickness to match your hydraulic cylinder’s unique specifications.


What does the 1-year warranty cover?

The warranty covers manufacturing defects, including material flaws, improper heat treatment, and surface processing issues. It does not include damage caused by improper installation, misuse, or natural wear and tear.


How does the surface treatment improve performance?

Surface quenching enhances hardness, electroplating provides corrosion resistance, and 2Cr13-4Cr13 stainless steel overlay welding adds a wear-resistant layer—together, they protect the plunger from abrasion, rust, and impact in high-demand molding operations.


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