Clamping Cylinder / Actuator

Product Specifications

Technical details and manufacturing context for Clamping Cylinder / Actuator

Definition

A clamping cylinder or actuator is a critical component within a mold box clamping system that generates and applies the necessary force to securely hold mold halves together during injection molding, die casting, or other manufacturing processes. It ensures proper mold closure, prevents flash formation, and maintains consistent pressure throughout the production cycle. The cylinder converts hydraulic or pneumatic pressure into linear mechanical force. When pressurized fluid enters the cylinder chamber, it pushes against a piston, which extends a rod to apply clamping force to the mold. The system typically includes control valves to regulate pressure and flow for precise force application and release. This directory entry provides reference specifications for typical clamping cylinders used in industrial machinery. The bore diameter ranges from 32 to 100 mm (ISO 6432), stroke length from 10 to 50 mm, operating pressure from 0.1 to 1.0 MPa, and clamping force from 500 to 5000 N. Operating temperature is -5 to 60 °C, ingress protection is IP54 to IP65 (IEC 60529), and port size is G1/8 to G1/2 (ISO 228-1). Materials include chrome-plated steel for the piston rod (grade 45 per GB/T 699), aluminum 6061-T6 for the cylinder body (ASTM B221), and NBR seals (ASTM D2000). Weight ranges from 1.5 to 8.0 kg. These values are typical ranges; actual specifications must be confirmed with the legal manufacturer or supplier for the specific model and application. Standards listed are procurement references, not certification guarantees. The cylinder body material is aluminum, and the piston rod is hard chrome-plated steel. Seals are oil-resistant NBR. The product is a component, not a complete system, and requires integration with a control system and power source.

Working Principle

The clamping cylinder operates by converting hydraulic or pneumatic pressure into linear mechanical force. When pressurized fluid enters the cylinder chamber, it pushes against a piston, which extends a rod to apply clamping force to the mold. The system typically includes control valves to regulate pressure and flow for precise force application and release. The force generated is proportional to the pressure and the piston area. For example, at a bore diameter of 32 mm and pressure of 0.1 MPa, the theoretical force is about 80 N, but actual force depends on friction and other factors. The cylinder must be sized to provide sufficient clamping force to counteract the injection pressure and prevent mold opening. The operating pressure range is 0.1 to 1.0 MPa; below 0.1 MPa, force may be insufficient. Seals degrade outside the temperature range of -5 to 60 °C. The ingress protection rating indicates resistance to dust and water, with IP65 suitable for washdown environments.

Common Materials

Chrome-plated steel, Cast iron, Sealing materials (polyurethane, nitrile rubber)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Bore Diameter	32–100 mm	Determines clamping forceISO 6432
Stroke Length	10–50 mm	Affects clamping range
Operating Pressure	0.1–1.0 MPa	Below 0.1 MPa insufficient force
Clamping Force	500–5000 N	At rated pressure
Operating Temperature	-5–60 °C	Seals degrade outside range
Ingress Protection	IP54–IP65	IP65 for washdownIEC 60529
Cylinder Body Material	6061-T6 Aluminum	Corrosion resistantASTM B221
Piston Rod Material	45 Steel	Hard chrome platedGB/T 699
Seal Material	NBR	Oil resistantASTM D2000
Weight	1.5–8.0 kg	Depends on size
Port Size	G1/8–G1/2	Match to systemISO 228-1

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Cylinder Barrel
Houses the piston and contains pressurized fluid

Material: Chrome-plated steel
Piston Part
Converts fluid pressure into linear force

Material: Hardened steel
Piston Rod Part
Transmits clamping force to the mold

Material: Chrome-plated steel
Seals Part
Prevent fluid leakage between moving parts

Material: Polyurethane or nitrile rubber
Mounting Flange Part
Secures the cylinder to the clamping system frame

Material: Cast iron or steel

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Mold Box Clamping System

View system integration details

Manufacturers of Clamping Cylinder / Actuator

Manufacturer profiles associated with Clamping Cylinder / Actuator.

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Frequently Asked Questions

What is the typical bore diameter range for a clamping cylinder?

The bore diameter typically ranges from 32 to 100 mm, as per ISO 6432. This dimension determines the clamping force capability; larger bores produce higher force at the same pressure.

What operating pressure is required for sufficient clamping force?

The operating pressure range is 0.1 to 1.0 MPa. Below 0.1 MPa, the force may be insufficient to hold the mold closed. The required pressure depends on the mold size and injection pressure.

What materials are used in the construction of a clamping cylinder?

The cylinder body is typically aluminum 6061-T6, the piston rod is hard chrome-plated steel (grade 45 per GB/T 699), and seals are made of NBR (nitrile rubber) which is oil-resistant. These materials provide corrosion resistance and durability.

What is the operating temperature range for the seals?

The seals are designed to operate within -5 to 60 °C. Outside this range, seal degradation may occur, to leaks and reduced performance. Always verify the temperature limits for the specific seal material.

Data Basis

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pressure:	Up to 300 bar hydraulic, 10 bar pneumatic
other spec:	Flow rate: 5-100 L/min hydraulic, 100-1000 NL/min pneumatic; Slurry concentration: Not applicable (sealed system)
temperature:	-20°C to 120°C

Product Specifications

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