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Method and device for compressing granular materials

A compaction device, a technology for granular materials, applied in material forming presses, presses, fluids utilizing vibration, etc., can solve problems such as insufficient use of resonance

Inactive Publication Date: 2004-02-18
吉迪布工程局和革新指导处有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Potential for improvement lies in the advantages of the still underutilized resonance effect

Method used

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  • Method and device for compressing granular materials
  • Method and device for compressing granular materials
  • Method and device for compressing granular materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] FIG. 1 a shows an oscillating mass-spring system that can be used in a resonant vibrator for carrying out the method according to the invention.

[0014] Rectangle 100 represents system mass “m” vibrating in the direction indicated by double-headed arrow 102 . The mass is supported on a frame 104 by two springs, more precisely by springs of stiffness C 1 The upper spring 106 and the spring rate is C 2 The lower spring 108 supports. The rectangle 100 representing the mass m has two positions which represent the opposite positions of the vibratory motion. The position of the upper line 110 represents the sum 2A of the two vibration amplitudes A. When upper thread 110 is at position 112, it is an intermediate position. The exciter actuator required for the exciter is indicated by the double-headed arrow 114, while Fe indicates the force amplitude of the harmonically excited vibration acting on the mass m.

[0015] In one instance, spring 108 may be a compressed extens...

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PUM

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Abstract

The invention relates to a method and device for the compression of granular materials. On compressing granular material to give prepared products e.g. concrete paving slabs, a resonance vibrator with an oscillating mass-spring system is applied, which may be energised by a controllable energiser to produce forced oscillation of a given frequency and oscillatory amplitude. The resonant effect, making use of the proximity of the inherent resonance frequency and the exciter frequency permits a reduction in the size of the exciter force. According to the invention, along with an adjustment of the exciter frequency the resonant frequency is also simultaneously co-adjusted by means of a suitable adjuster, in order to be able to g make use of the resonance effect throughout the whole spectrum of the exciter frequencies to be carried out.

Description

technical field [0001] The present invention relates to methods and apparatus for compacting granular materials. Here, it mainly concerns the compaction method in which granular material is molded in a molding box to form a final product, such as concrete blocks produced in a concrete block making machine. However, compaction may also relate to the compaction of grounds consisting of granular material, for example the ground of a motorway. More specifically, the present invention relates to a method of performing compaction work using a vibrator with a vibrating mass-spring system whose operating frequency is close to the natural frequency of the mass-spring system. Background technique [0002] In this case, the mass-spring system is used for the exciter excitation of forced vibrations due to a frequency adjustable. Preferably also the size of the period portion in which the exciter generates excitation energy is adjustable. When making concrete blocks in a concrete bloc...

Claims

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Application Information

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IPC IPC(8): B06B1/10B28B1/08B28B3/02B30B11/02F16F15/023
CPCB30B11/022B30B11/005
Inventor 休伯特·鲍尔德
Owner 吉迪布工程局和革新指导处有限责任公司
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