JPS62207915A - Weighting and compounding device - Google Patents

Abstract

PURPOSE:To mix several kinds of compounding materials without using a mixer, by distributing and containing successively several kinds of compounding materials by one kind each into each chamber of a receiving hopper, and thereafter, discharging them successively to a collecting chute from each chamber of the receiving hopper. CONSTITUTION:A particulate matter being a compounding material is supplied by one kind each by a supplying machine 1 from the periphery of the upper opening of a weighing hopper 2, and weighed by the weighing hopper 2. Thereafter, when the supply is stopped at a set value, and a cone gate 4 is opened, said particulate matter is dropped in the radial direction by a conical shape of the cone gate 4, and distributed and contained equally into each chamber of a receiving hopper 7 of the lower part. When this operation is repeated with regard to several kinds of particulate matter to be compounded, they form a layer in order from below and accumulated in each chamber of the receiving hopper 7. Subsequently, when a flap gate 8 of each chamber of the receiving hopper 7 is opened successively, the granular bodies which have been accumulated as layers (a)-(d) in each chamber drop successively into a collecting chute 11 of the lower part, and in that case, they are mixed with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Object of the Invention [Industrial Application Field] The present invention relates to an apparatus for measuring and blending several types of granular raw materials.

[Conventional technology]

Conventionally, a method has been used in which each powder or granule is weighed to a predetermined weight using one or several weighing machines, and then put into a mixer at the bottom and mixed.

[Problem that the invention seeks to solve]

Therefore, a mixer is always required at the bottom of the weighing machine, making the entire equipment quite expensive.

The object of the present invention is to obtain a weighing and blending device that can mix several types of objects to be weighed without using a mixer.

M configuration of the invention [Means for solving the problem] That is, a cylindrical discharge port 3 opened and closed by a cone gate 4
A receiving hopper 7 having a cylindrical shape and having multiple chambers 71 to 7B partitioned in a radial direction is arranged below the weighing hopper 2 having 11.
This system is characterized by having a structure in which several types of blended raw materials are sequentially supplied to a weighing hopper.

[For production]

When the cone gate 4 is opened after weighing with the weighing hopper 2, the powder and granules are guided downward by the cylindrical discharge port 3 of the hopper 2, and fall in a radial direction due to the conical shape of the cone gate 4 to the lower receiver. It is evenly distributed and stored in each part Jl 7 i to 78 of the hopper 7.

When this process is repeated for several types of powder and granular material to be blended, layers are accumulated in each part Jl 71 to 78 from the bottom.

Next, when the flap gates 8 of each part Jl 71 to 78 are sequentially opened, the powder and granules accumulated in layers a to e in each chamber 71 to 76 sequentially fall into the collecting chute 11 below. Their prominence is mixed and mixed.

〔Example〕

The weighing hopper 2 has a conical shape and has a small-diameter cylindrical discharge port 3 at the bottom, and discharge is performed through a cone gate 4. The cone gate 4 is pulled up from the top of the weighing hopper 2 by a rod 6 of an air cylinder 5 to close it, and pushed down to open it.

The objects to be weighed are fed one by one from around the upper opening of the weighing hopper 2 by a plurality of feeders 1 such as screw feeders, the feeding is stopped at a set value, the cone gate 4 is opened, and the objects are discharged to the lower part. . This weighing and discharging process is repeated for each raw material, and one batch is completed when all types are finished. W is a weighing machine.

A receiving hopper 7 is disposed below the discharge port 3, and as shown in the figure, the receiving hopper 7 is cylindrical in shape, and the interior is divided radially into approximately eight equal parts, with each chamber 71, 72...78. A flap gate 8 is attached to each.

The flap gate 8 has a shaft 9 at the center of one room, and has two flaps that open and close on both sides. The illustrated example uses an air cylinder 10, and the tip of the rod 10a,
The flap end portion 8a extending outwardly of the receiving hopper 7 is connected by a link 10b, and both flaps 8 are opened and closed as shown by the chain lines in FIG. 4 by moving the rod loa forward and backward.

Although not necessarily required, a collecting shoe 1-it is usually installed under the receiving hopper 7 to which a screw conveyor 12 for conveyance is attached.

The operation will be explained using this structure.

The raw material a supplied from the first feeder 11 is received by the weighing hopper 2, and when the set amount is reached, a quantitative signal is transmitted from the detection control circuit of the weighing machine W, and the supply is stopped. In order to improve supply accuracy, the control system, such as large and small two-stage supply and head compensation, is used as usual! Although it is the same as a hopper scale, etc., the explanation will be omitted because it has no direct relation to the present invention.

Each time raw materials a, b, c... are measured, the rod 6 of the air cylinder 5 is protruded to push down the cone gate 4, and from the gap between the discharge port 3 and the cone gate 4, the raw materials are radially distributed along the shape of the cone. Falling into.

They are evenly stored in each room 71-7 of the lower receiving hopper 7.

When this operation is performed sequentially for each raw material, each of the receiving and puffing rooms 7□ to 7B will have raw materials a@
bφC... is accumulated in an even layer.

For the purpose of mixing powder and granular materials, there must be a wide variety of raw materials, so it is necessary to supply as many types of raw materials as possible! 1 is required, and the feed port of the feeder is located around the periphery of the weighing hopper 26.Therefore, the raw material is supplied unevenly into the weighing hopper 2 as shown in FIG. When discharging from the weighing hopper 2 in this state, since it flows down from one direction, it does not enter each part 117t to 7a of the receiving hopper 7 evenly, resulting in some rooms having more and others having less. In order to prevent this, a straight cylindrical part is provided at the bottom of the conical weighing hopper 2, so that no matter which direction the raw material flows in, the straight cylindrical part kills the velocity in the diagonal direction and the straight cylindrical part discharge port 3 so that it falls vertically. Determine diameter and length.

When discharging from the receiving hopper 7, the raw materials in one room are separated into left and right sides and are discharged by two flap gates 8 that open left and right.
By repeating this sequentially, the small parts m 71 to 7B become 8
If it is divided, it will be divided into 16 parts and sent out.

Further, when feeding to the next process is carried out by a collecting shoe 11 installed below the receiving hopper 7 and a screw feeder 12 attached to the bottom thereof, the materials are completely mixed during transportation.

The capacity of the collecting shoe 11 is set to be large enough to receive all of the objects to be weighed in one batch, and a lower limit level switch 13 is provided, and this signal starts discharging from the receiving hopper 7. When the entire quantity has been discharged, the next By charging the first raw material from the weighing hopper 2 to the receiving hopper 7, continuous blending becomes possible.

Weighing hopper 2 repeats one type of weighing for each raw material, so
The maximum weighing value is smaller than cumulative weighing, and the error can be reduced accordingly.

C. Effects of the Invention Since the invention has the above structure, it is possible to mix several types of powder and granular materials without using a mixer as in the conventional method, and this type of measuring and blending device can be obtained at low cost. effective.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional front view of the measuring and blending device of the present invention, Fig. 2 is a plan view of the receiving hopper, and Fig. 3 is an expanded longitudinal sectional front view of the receiving hopper.
FIG. 4 is a schematic diagram of the flap gate opening/closing mechanism. 1 is a powder feeder, 2 is a weighing hopper, 3 is a cylindrical discharge port, 3 is a cone gate, 7 is a receiving hopper, 8 is a flap gate, and 11 is a collection chute.

Claims (1)

[Claims] (1) A receiving hopper having a cylindrical shape with multiple chambers partitioned in the radial direction is arranged below a weighing hopper having a cylindrical discharge port that is opened and closed by a cone gate, and a discharge flap of the receiving hopper is arranged. A weighing and blending device characterized in that a gate is provided in each room and sequentially opened to discharge the discharge into a collecting chute below, and several types of mixed raw materials are sequentially supplied to a weighing hopper.