JPH0543420B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rice milling machine for milling brown rice, particularly a friction-type rice milling machine that holds the milling section at high pressure and mills rice by friction between rice grains. Regarding the improvement of

[Conventional technology]

The polishing section of a friction-type rice milling machine has a structure in which a polishing roll having protrusions is rotated on the inner surface of an outer cylinder made of a perforated plate. Furthermore, in order to increase rice pressure within the milling section, a grain feeding section is provided in the front stage of the milling section, and a pressure plate is attached to the discharge port of the milling section. The structure of the grain feeding section is generally such that a grain feeding spiral is provided coaxially with the milling roll. Therefore, the supplied rice grains are forced into the grain feeding section and sent to the milling section.
In the whitening section, whitening action is applied under a predetermined milling pressure.

In addition, a compound milling type rice milling machine with a grinding type rice polishing unit installed before the friction type polishing unit was published in Special Publication No. 47-652.
It has already been proposed as No. 653 and No. 654.
In this rice milling machine, from the brown rice supply device to the first grain feeding section -
Each part is coaxially provided in series in the following order: grinding type milling section, second grain feeding section, and friction milling section.

[Problem to be solved by the invention]

However, in the conventional conventional rice milling machine, brown rice is supplied to the grain feeding section, and from there it is pumped to the milling section, and even in the compound rice milling machine, brown rice is fed in the first feeding section. Since the grain is supplied to the grain department and sent from there to the grinding type milling department, grain feeding may be disrupted or grain feeding may become impossible. There are several causes for this problem, but the first is that brown rice contains waxy oil on its surface, and this oil melts when heated and absorbs fine dust. As a result, so-called slag occurs, which fills in the valleys of grain feeding. The second problem is when grain moths breed in brown rice and their secretions bind the rice grains, and in this case too, the grain feeding spiral does not act sufficiently on the rice grains, causing becomes unstable.

The present invention prevents grain feeding failures that occur in conventional machines as described above, and stabilizes feeding in the grain feeding section.
The purpose is to provide a rice milling machine that can perform rice milling work evenly.

[Means to solve the problem]

The technical means of the rice milling machine of the present invention includes a grinding type pre-processing section, a spiral grain feeding section, and a friction type polishing section, each of which is coaxially arranged in the above order, and , the pre-processing section is installed at the brown rice supply position,
The brown rice is first subjected to a light milling process using a grinding method in the pre-processing section, then sent to the grain feeding section, and then pumped to the milling section.

[Effect]

In the rice milling machine of the present invention, brown rice is first sent to the pretreatment section. In the pre-treatment section, a light grinding process is applied to the surface (bran layer) of brown rice that is difficult to see with the naked eye. As a result, the binding of the rice grains is loosened, and the secretions of grain moths and various other deposits that have adhered to the surface of the rice grains, as well as the oils and fats of the rice grains, are removed along with a very small amount of bran. The rice grains that have been pretreated in this way are then sent to the grain feeding section. In the grain feeding section, feeding is applied by the rotation of the grain feeding spiral, but since the rice grains have been pretreated, they are easily subjected to the grain feeding action by the spiral, and the rice grains are reliably sent to the milling section. In the milling section, milling is applied to the rice grains using a friction method to produce polished rice.

〔Example〕

An embodiment of the rice milling machine of the present invention will be described with reference to the drawings. 1 is the hopper, from which brown rice is supplied. Reference numeral 2 denotes a pretreatment section in which a grinding roll 3 made of diamond sand or the like is rotated. A grain feeding section 4 is provided in series with the pre-processing section 2 for feeding grain.
Inside the grain feeding section 4, a grain feeding spiral 5 is rotated. The grain feeding spiral 5 and the grinding roll 3 are coaxially provided and rotate together. Reference numeral 6 denotes a milling section, which is provided continuously to the grain feeding section 4. Inside the whitening section 6, a whitening roll 7 having protrusions is rotated. The whitening roll 7 is provided coaxially with the grain feeding spiral 5 and is rotated together. 8 is an outer cylinder, which has a porous wall at the white part 6. Reference numeral 9 denotes a grain threshing port at the end, to which a pressure plate 10 to which a predetermined back pressing force is applied is attached.

In the rice milling machine described above, when brown rice is supplied from the hopper 1, the brown rice first enters the pretreatment section 2 and is ground and polished by the grinding rolls 3. The accuracy of grinding in this grinding process is extremely low, and the surface of the bran layer of the rice grains is only lightly ground. The rice grains that have undergone this pre-treatment by grinding enter the grain feeding section 4, and are forcedly fed toward the milling section 6 by the rotation of the grain feeding rolls 5. The rice grains sent to the milling section 6 undergo friction polishing by the rotation of the milling rolls 7, and are finished into polished rice. The rice grains that have been polished are successively pushed aside from the pressure plate 10 and discharged from the grain outlet 9.

〔Effect of the invention〕

In the rice milling machine of this invention, the pre-processing section is provided before the grain feeding section, so brown rice is first subjected to grinding and polishing, which loosens the binding of the rice grains and removes any adhesion on the surface of the rice grains. The rice grains are stripped of oil and fat along with a small amount of bran, and the rice grains become fluid and sent to the grain feeding section. Therefore, in the grain feeding section, the rotation of the grain feeding spiral reliably feeds the rice grains.
Grain feed is stable and rice can be polished evenly. In addition, the bran removed from the surface of the rice grains in the pre-processing section moves together with the rice grains to the grain feeding section, so the presence of this bran contributes to the stability of grain feeding in the grain feeding section, resulting in the formation of the so-called spiral. Prevent staining accidents. Furthermore, in the present invention, since light grinding is applied to the rice grains in the pre-treatment section, there is an advantage that the milling efficiency is improved when milling is performed by friction in the milling section.

[Brief explanation of drawings]

The drawing shows a sectional view of an embodiment of the rice milling machine of the present invention. 1...Hopper, 2...Pre-treatment section, 3...Grinding roll, 4...Grain feeding section, 5...Grain feeding spiral, 6...
Whitening section, 7... Whitening roll, 8... Outer tube, 9...
Grain threshing port, 10...pressure plate.

Claims (1)

[Claims] 1 Consisting of a grinding type pre-processing section, a spiral type grain feeding section, and a friction type polishing section, each of the above sections are arranged coaxially in the above order, and the pre-processing section is installed at the brown rice supply position. In this rice milling machine, the brown rice is first subjected to a light polishing process using a grinding method in the pre-processing section, then sent to the grain feeding section, and then pumped to the milling section.