Agitating – Mortar mixer type – Methods
Patent
1997-03-14
1999-02-02
Soohoo, Tony G.
Agitating
Mortar mixer type
Methods
366 65, 366315, 366317, 3661722, 366 10, B28C 516, B01F 726
Patent
active
058655344
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a materials mixer and especially, but not exclusively, to a continuous materials mixer for the production of concrete
Substantial quantities of concrete are frequently required for use in, for example, the building industry. Traditionally such large quantities have been produced by stationary plants, usually situated close to quarries, and the mixed concrete has then been transported, in special purpose lorries or trailers, to the site where the concrete is required.
Often concrete is required in smaller quantities and it is usual to make up such small quantities on-site using a drum type device. Drum-type devices are generally loaded manually, with the desired amounts of the various constituents of the concrete and are used to mix a batch of concrete, before removal of that batch and manual depositing of the constituents of the next batch into the drum.
Such drum-type mixers are generally capable of mixing only small batches and are therefore unsuitable for providing large amounts of mixed concrete. In addition, because the constituents are deposited manually into the drum different batches may be inconsistent in quality and constitution. Should such a mixer be required to provide a large quantity of concrete many separate batches must be made up, which would be both time consuming and labour intensive.
Provision of large quantities of concrete has therefore generally required transport of the concrete from the site where it is mixed, to the site where it is required. This requires expensive purpose-built transporters, and may be inconvenient and tine inefficient, especially if the site where the concrete is required is far from the site where the concrete is made up.
According to the present invention there is provided a materials mixer for mixing materials comprising a housing containing a mixing chamber, the housing having an upper inlet for materials to be mixed and a lower discharge outlet for mixed materials, and at least one rotatable mixing element in said mixing chamber, said at least one mixing element being positioned in the path between said inlet and said discharge outlet, to effect mixing of the materials to be mixed.
Preferably, said at least one rotatable mixing element comprises a member mounted on a rotatable shaft, and extending radially away from the axis of said shaft.
Preferably, said mixing chamber has an upper dry mixing chamber portion for the mixing of a plurality of substantially dry materials, a central, wet mixing chamber portion for the mixing of at least one fluid with a mixture of substantially dry materials, and a lower discharge chamber portion for controlling the motion of mixed materials towards the discharge outlet.
Preferably, there is provided at least one rotatable mixing element comprising a dry mixing disc provided in said dry mixing chamber portion, and at least one rotatable mixing element comprising a wet mixing disc in said wet mixing chamber portion.
Preferably, the boundary between the dry mixing chamber portion and the wet mixing chamber portion is defined by a subsequent rotatable mixing element comprising a dry mixing disc.
Preferably, there is provided at least one rotatable element in said discharge chamber portion, said at least one rotatable element comprising a discharge member.
Preferably, said discharge member is coupled to said rotating shaft so as to allow it to rotate with lower angular velocity than said rotating shaft.
Preferably, said discharge member includes a substantially helical member located upon an upper surface of said discharge member.
Preferably the wall of said dry mixing chamber portion comprises a dry mix baffle plate which is configured so as to control the movement of materials from the dry mixing chamber portion to the wet mixing chamber portion.
Preferably, the wall of said wet mixing chamber portion comprises a wet mix baffle plate which is configured so as to control the movement of materials from the wet mixing chamber portion to the discharge chamber portion.
Preferably, said wet mix baff
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IDC Mixers Limited
Soohoo Tony G.
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