Fluent material handling – with receiver or receiver coacting mea – With testing or weighing receiver content
Patent
1998-06-10
1999-12-14
Douglas, Steven O.
Fluent material handling, with receiver or receiver coacting mea
With testing or weighing receiver content
141192, 141 95, B65B 104
Patent
active
060004444
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a method and an apparatus for filling bulk (powder and grain) material to a filling object such as a container and the like.
BACKGROUND OF THE INVENTION
Examples of related bulk material filling apparatuses have been disclosed in Japanese Patent Application Laid-Open No. (JP-A) 113362/79 (first related art) and Japanese Patent Application Laid-Open No. (JP-A) 52001/83 (second related art).
According to the first related art, first the volume of bulk material is measured with a massive filling measure and its weight thereof is measured with a measuring device. Then, the bulk material is poured continuously in a small quantity through a small hole and when the poured amount reaches an objective filling value, the small hole is closed such that the filling operation is completed.
According to the second related art, the weight of a package product in which its filling of bulk material is completed is measured with a weight checker and the tendency in the supply amount thereof from a cup measuring device is controlled. At the same time, a bulk material surface detecting device is provided on the hopper and according to signals output from this detecting device, the amount of bulk material flowing into the hopper is adjusted.
However, the related arts have the following problems.
(1) In the first related art, the small throw-in of the bulk material is conducted using the small holes, thus if the characteristics of powder change, the fluidity thereof is affected. Thus, if the fluidity thereof is deteriorated, the powder falling time is prolonged thereby reducing the filling accuracy.
(2) In the second related art, a result of measured weight of the package product after the filling is completed is fed back to the next filling operation. The flow rate cannot be compensated at real time. Thus, in this second related art as well, if the fluidity of bulk material changes, a high precision filling cannot be conducted.
(3) In both the first and second related arts, when the throw-in is terminated, the amount of bulk material (called falling amount Wh) existing in the air (falling height) from just below the outlet of a storage portion closed by the opening/closing device up to a filling object is considered. It is necessary to control the opening/closing device at a timing in which the filling weight W of bulk material filled in the filling object reaches W=W.sub.0 -Wh (W.sub.0 : objective amount). However, the falling height of bulk material varies depending on the size of a container which is the filling object. Thus, it is necessary to change the closing timing of the opening/closing device for every container size, so that a time required for changing a product type increases.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide a method for filling bulk material to a filling object rapidly and at a high precision.
The present invention provides for a method for filling bulk material, wherein after the bulk material is filled into a measure and the bulk material in the measure is massively thrown into a container, the throw-in amount of the bulk material per unit time is adjusted to be substantially constant so as to conduct additional throw-in thereof. The additional throw-in amount thereof is approximated linearly with respect to time and then the additional throw-in is stopped based on the approximation line and a predetermined filling weight.
Further according to the present invention, there is provided an apparatus for filling bulk material, comprising: a measure to be filled with the bulk material; a filling means for filling the bulk material to the measure; a throw-in means for throwing the bulk material filled in the measure to a container; a transportation means having a measuring device, for carrying the container; and a control unit for approximating the additional throw-in amount thereof linearly with respect to time and activating the throw-in means based on the approximated line and a predetermined filling weig
REFERENCES:
patent: 4621664 (1986-11-01), Pryor et al.
patent: 5148841 (1992-09-01), Graffin
patent: 5287896 (1994-02-01), Graffin
Akezawa Sigeru
Ishikawa Takao
Miyazaki Nobuo
Shinagawa Takahiro
Douglas Steven O.
Kao Corporation
LandOfFree
Method and apparatus for filling bulk material does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for filling bulk material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for filling bulk material will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-854912