WO2004056486A1

WO2004056486A1 - The distance roller of small sized rice polishing machine

Info

Publication number: WO2004056486A1
Application number: PCT/KR2002/002341
Authority: WO
Inventors: Bok Sick Choi
Original assignee: Bok Sick Choi
Priority date: 2002-12-12
Filing date: 2002-12-12
Publication date: 2004-07-08
Also published as: WO2004056486A8

Abstract

This patent deals with a portable/small sized rice-polishing machine and specifically modifies the distance roller assembly by introducing V-shaped guiding notches/grooves at the interface section of the roller. The V-shaped guiding grooves/notches keep sloughed rice grains from sticking or pressing together or being stuck under friction, heat, and pressure at the interface point between the transport screw and the polishing unit, thus preventing debris accumulation within the machine and making an efficient discharge of polished white rice grains possible. With this patent, the economic and productivity aspects of operating a potable/small sized rice-polishing machine are much improved.

Description

The distance roller of small sized rice polishing machine

[Technical field]

This patent is related to a portable/small sized rice-polishing machine.

Specifically, this patent involves an improved distance roller design that

minimizes the debris accumulation and blocking in the roller assembly. This

design improves the units polishing productivity by allowing an efficient

discharge of polished white rice grains without wet or sloughed grains

being stuck at the interface area between the polishing section and the

transport screws sloped surface.

[Background of invention]

Typically, quite a bit of heat is generated by friction in the polishing

section of a portable rice-polishing machine during the polishing process.

Sloughed rice grains tend to stick and press together under friction, heat,

and pressure, and the grain discharge process does not tend to work well

due to the blocked grains. As a result, the electrical consumption is

increased, and the polishing helical unit and the slough screen tend to be

damaged often by the accumulated debris, requiring frequent replacements

of the machine parts and making operating a portable polishing machine inconvenient and uneconomical. With polished white rice grains not being

discharged properly and efficiently, the rice-polishing job becomes

unproductive. Wet or sloughed rice grains often tend to be stuck at the

interface between the polishing section and the sloped surface of the

transport screw. This phenomenon tends to get worse when operating a

small sized rice-polishing machine for a long period of time.

[Detailed statement of invention]

This patent involves the introduction of V-shaped guide grooves/notches at

the sloped interface section between the transport screw and the polishing

helical shaped assembly, in order to minimize the accumulation and

blocking problems described previously, resulting in much improved and

productive rice grain polishing. The V-shaped guide grooves/notches

keep wet or braking sloughed rice grains from sticking together, and then

being stuck in the transport shaft by agitating the rice gains apart

forcefully, before they are driven to the polishing section/chamber. This

patent is about this special feature to the distance roller in a

portable/small sized rice-polishing machine.

[Briefing of drawing] Fig. 1 is a three dimensional graphical representation of the distance roller

with the patent feature.

Fig. 2 is a top view of the distance roller with the patent feature.

Fig. 3 is a front view of the distance roller with the patent feature.

Fig. 4 is a front view of the distance roller with the patent feature in a

slightly angled position.

Fig. 5 is a drawing of the distance roller with the patent feature in

operation and shown installed in a typical portable rice polishing machine.

* Name of symbol for the main part in the figures

1 : Distance Roller

2: Polishing Section

3: Transport Screw

4: V-shape Guide Notch/Groove

6, 6a: Helical Polishing Unit

L: Interface Line

R: Interface Surface

7,7a,8,8a: Added Feature

[Example of practical application] Using the drawings included here, how this patented feature works is

explained in detail below.

Fig. "2 and 3 show the top and front views of the distance roller,

respectively, with the patent V-shaped notch, while Fig. 4 is a front view

of the distance roller with the groove at a slight angle.

The distance roller (1) assembly is made up of the transport screw (3),

the polishing section (2) and the polishing unit (6) (6a) in a helical shape

integrated at both sides of the polishing section (2). The interface

between the transport screw (3) and the polishing section (2) becomes

narrower toward the polishing section (2) by the sloped interface surface

(R). By extending the entry side of the helical shaped polishing unit (6)

(6a) at both sides of the polishing section (2) with, notches/grooves (7)

(7a), they get closer to the discharge side of the transport screw (3) at

the same slope as the interface surface. The notches/grooves (8) (8a)

can be angled slightly as shown in Fig. 4. Within the interface surface

(R) and the interface line (L) of the polishing section (2), the

V-shaped guiding grooves/notches (7) (7a), (8) (8a) are found to work

well in braking the stuck rice grains apart for smooth and continuous transport in the improved rice polishing machine.

Fig. 5 shows other parts of a typical portable/small sized rice-polishing

machine not explained previously.

(9) is the main body of a portable rice polishing machine.

(10) is the hopper entry for sloughed rice grains.

(11) is the slough screen

(12) is the step style discharge opening.

(13) is an angle plate.

(14) is the hopper fan.

(15) is the motor driven pulley assembly.

In a small sized rice polishing machine, sloughed rice grains put into the

hopper entry (10) of the main body (9) are moved toward the polishing

section (2) covered by the slough screen (11 ) by the rotating transport

screw (3) and get polished into white rice grains by the helical shaped

polishing assembly (6) (6a) in the polishing section (2). Polished white

rice grains then drop to the sloped plate (13) through the slough screen

(11 ) before going out to the step style discharge (12). The slough screen

filters the slough debris, and the slough debris accumulated inside the main body of the rice-polishing machine gets blown out to the outside by

the hopper fan (14). This is how a portable rice-polishing machine

typically works.

The following explains how the distance roller assembly (1) works in the

rice polishing process with the patent feature.

As sloughed rice grains are moved toward the polishing section (2) by the

rotating transport screw (3) of the distance roller (1 ), they go through the

interface surface and the interface line smoothly, when the rice-polishing

machine is operating normally. However, as friction, heat, and pressure

build up in the machine, the sloughed rice grains tend to stick and press

together and become stuck at the interface section. The patent V-shaped

guide grooves/notches (7) (7a), (8) (8a) are slightly misaligned and agitate

sloughed grains concentrated at the sloped interface surface (R) apart

violently as the distance roller rotates, making them not to stick together

or not to be stuck at the interface. During lengthy operations of the rice

polishing machine, even if wet or sloughed grains get stuck at the

interface occasionally, the patent V-shaped guide notches/grooves make

possible the normal, smooth, and continuous transfer of sloughed grains to the polishing section through the interface.

[Possibility of using in industry]

With this patent, a portable rice-polishing machine can be operated more

economically and more productively. The electrical power consumption is

minimized, because the machines motor does not have to work so hard,

when the machine is operating smoothly without sloughed rice grains stuck

in the interface section. The maintenance costs are also minimized,

because machine parts, such as the slough screen and the polishing unit,

do not get damaged as often. The productivity is further improved by an

efficient discharge of polished white rice grains.

Claims

[Claims]

[13

The distance roller (1) assembly is made up of the transport screw (3),

the polishing section (2) and the polishing unit (6) (6a) of a helical shape

integrated at both sides of the polishing section (2). The interface

between the transport screw (3) and the polishing section (2) becomes

narrower toward the polishing section (2) by the sloped interface surface

(R). By extending the entry side of the helical shaped polishing unit (6)

(6a) at both sides of the polishing section (2) with V-shaped guide

grooves/notches (7) (7a), they get closer to the discharge side of the

transport screw (3) at the same slope as the interface surface. The

notches/grooves (8) (8a) can be angled slightly as shown in Fig. 4.

Within the interface surface (R) and the interface line of the polishing

section (2), the V-shaped guiding grooves/notches (7) (7a), (8) (8a)

operate in the improved rice polishing machine.