Flat Vibration Motor
vibrating motor
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Flat Vibration Motor

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Product Introduction

Flat Plate Concrete Vibrator (Construction Grade)

In the construction field, a flat vibration motor or flat plate vibrator refers to a surface vibrator that is placed directly on top of freshly poured concrete to compact it.

I. Basic Definition & Working Principle

A flat plate vibrator consists of two main parts: the motor-vibrator assembly (motor + eccentric weights) and the base plate.

Working Principle: The motor drives eccentric weights on the rotor shaft to rotate at high speed, generating a periodic centrifugal force. This force is transmitted to the rigidly connected base plate, which then transfers vibration waves directly into the concrete. The vibration reduces internal friction and adhesion, increases concrete fluidity, allows aggregates to rearrange, fills voids, and expels air bubbles. The result is dense, consolidated concrete.

II. Key Characteristics

Adjustable Centrifugal Force: By changing the angle between the eccentric weights, the centrifugal force can be steplessly adjusted to suit different concrete slump values.

Easy to Operate: Typically equipped with a handle or pulling rod with buffer springs. This makes it easy for workers to drag the unit across the surface and significantly reduces hand-arm vibration.

Durable Construction: Most units feature fully enclosed, high-strength designs. Some housings are made of cast aluminum alloy, making them lightweight yet rugged.

III. Main Types & Comparison

The following table compares the Flat Plate Vibrator with the External Formwork Vibrator:

Feature	Flat Plate Vibrator	External Formwork Vibrator
Working Method	Placed directly on the concrete surface	Bolted onto formwork or equipment
Typical Applications	Concrete pavements, floors, slabs, precast panels (large area, low thickness)	Bridge girders, T-beams, tunnel linings (dense rebar, complex shapes), hoppers, feeders
Vibration Type	Surface vibration – waves penetrate from top surface	External vibration – waves transmit through formwork
Typical Parameter	Effective depth: approx. 120–200 mm	Depends on centrifugal force; suitable for thick or irregular sections

IV. Operation Guidelines

Proper use of a flat plate vibrator is critical for quality concrete:

Zone Vibration: Divide the concrete pour into rows. Move the vibrator slowly, evenly, and in sequence across each row.

Timing Control: Vibrate each position for approximately 25–40 seconds. Stop when the concrete surface stops settling and a layer of cement paste appears.

Overlap: When moving the vibrator, ensure the plate overlaps the previously vibrated edge by about 50 cm to prevent missed areas.

Layer Thickness: For slabs with double-layer rebar, the effective depth is about 12 cm. Pour in layers or use supplementary vibration methods.