JP3171365B2 - Metal scrap briquetting machine - Google Patents

Abstract

PURPOSE:To prevent temp. rise of metallic scrap and adhesion of briquettes to roll surfaces so as to enable continuous operation by boring the side faces at the bottom end of a screw feeder with cooling water passages and spraying cooling water onto the surfaces of press rolls. CONSTITUTION:The cooling water injected by a slight amt. each from a flexible hose 15 of a briquetting machine for continuously briquetting the metallic scrap passes the cooling water passages 16, 16 of the screw feeder 12 so as to be poured onto the metallic scrap from the side faces at the bottom end. Spraying nozzles 20, 20 spray the cooling water to continuously cool the press rolls 1, 1. As a result, the temp. rise at the time of preliminary compression by the screw feeder 12 of the metallic scrap is suppressed and the temp. rise by the heat generated at the time of press molding by the press rolls 1, 1 is suppressed and, therefor, the adhesion of the briquettes to the surfaces of the rolls 1, 1 is prevented and the continuous operation is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a briquetting machine for continuously granulating metal chips such as aluminum alloy chips.

[0002]

2. Description of the Related Art Conventionally, when briquetting metal scraps, the metal scraps generate heat when pre-compressing the metal scraps with a screw feeder and press-molding the metal scraps with a pressure roll. There is a problem that the surface of the pressure roll is heated and the granulated product adheres to the roll surface. In this case, the inside of the pressure roll is configured to circulate cooling water to cool the roll. However, in this method, the heat generation of the granulated raw material itself cannot be sufficiently suppressed, so that the granulated product adheres to the roll surface by continuous operation for several tens of minutes or about one hour, and the apparatus itself is operated with an overload. There was a problem that it became impossible. The present invention has been made in view of the above problems, and has as its object to provide a metal scrap briquetting machine that can be operated for a long time while suppressing temperature rise due to heat generated during pre-compression and pressure molding of metal scrap. And

[0003]

Means for Solving the Problems In order to achieve the above object, the metal scrap briquetting machine according to the present invention is provided with a speed reducer on an upper part of a hopper and connected to a rotation shaft of the speed reducer to rotate in the hopper. Screw screw
In a metal dust briquetting machine which presses and granulates metal scrap between a pair of pressurizing rolls while pre-compressing the metal scrap with a rotor, the rotating shaft of the speed reducer and the screw feeder are internally arranged from the upper end. A cooling water passage is formed through the lower end side of the rotating shaft, and a hose for supplying cooling water is connected to the upper end of the rotating shaft via a rotary joint and to the pressurizing roll. On the other hand, a spray nozzle for spraying cooling water is provided on the surface thereof.

[0004]

According to the present invention, by adopting the above-mentioned solution, the cooling water is introduced into the metal chips from the tip of the screw feeder little by little before the granulation thereof and is pre-compressed. At the same time, the surface of the pressure roller is cooled by spraying cooling water, so that the temperature rise of the metal scrap as the granulation raw material is suppressed, and the granulated material is continuously attached without adhering to the roll surface. Granulated.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. In FIG. 1, a pair of pressurizing rolls 1 and 1 have concave pockets 1A and 1A adapted to a predetermined granulation shape. 2, a feed base 3 is mounted on the top of the cheek plate 2 and the rolls 1, 1, and an upper surface of the feed base 3 is mounted on the upper surface thereof. A hopper 5 on which the speed reducer 4 is mounted is attached. A main shaft 7 is rotatably mounted inside the reduction gear 4 by a bearing 6, and a rotary shaft 8 is rotatably mounted by a bearing 9 in a positional relationship perpendicular to the main shaft 7. And the rotating shaft 8 are connected via a bevel gear 10.
At the lower end of the rotary shaft 8, a screw feeder 12 having a feed blade 11 wound around the tip is detachably attached. The rotary shaft 8 and the screw feeder 12 are provided with cooling water passages 16, 16 which open from the upper end through the inside and communicate with the lower side surface. A rotary joint 13 is attached to the upper end of the rotating shaft 8 and the rotary
A flexible hose 15 for supplying cooling water is connected to an upper end of the joint 13 via a piping jig 14. Spray nozzles 20 for spraying cooling water are provided outside the pressurizing rolls 1 and 1.

When granulation is actually performed by this apparatus, cooling water is sprayed from the spray nozzles 20 while rotating the pressurizing roll 1 by driving means (not shown) so that the pressurizing rolls 1 and 1 are formed. Allow to cool continuously. Next, the main shaft 7 is rotated by driving a driving means (not shown) connected to the main shaft 7. This rotation is transmitted to the rotating shaft 8 via the bevel gear 10, and the screw feeder 12 attached thereto also rotates. At this time, the flexible tube 15 does not rotate together with the rotating shaft 8 by the rotary joint 13 and remains stationary. Next, at the same time as the metal scrap is charged into the hopper 5, the flexible hose 15 is connected to the cooling water supply source to inject the cooling water little by little. The cooling water then flows through cooling water passages 16, 16 provided vertically inside the rotary shaft 8 and the screw feeder 12, and is poured into metal chips. As a result, the temperature of the metal chips due to the heat generated at this time can be suppressed despite the preliminary compression by the screw feeder 12,
Further, since the pressure roller 11 can also suppress the temperature rise due to the heat generated during the pressure molding by spraying the cooling water, the granulated material does not adhere to the surface of the roller 1 even when the roller 1 is operated continuously for a long time. Can be granulated.

[0007]

As is clear from the above description, the present invention can suppress the temperature rise during the pre-compression of metal scraps by the screw feeder and the pressure molding during the pressure molding, so that the granulated material has a roll surface. It is possible to operate continuously for a long time without adhering to the equipment. As a result, the production capacity is 2-3 times and the equipment cost is 1
/ 2 to ３.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of an embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 pressurizing roll 8 rotating shaft 12 screw feeder 13 rotary joint 15 hose 16 cooling water passage 20 spray nozzle

Claims (1)

(57) [Claims] 1. A reduction gear 4 is provided above a hopper 5, and a metal feeder 12 is connected to a rotation shaft 8 of the reduction gear 4 and rotates inside the hopper 5. In a briquetting machine of metal scraps to be pressed and granulated between a pair of pressurizing rolls 1, 1, a rotating shaft 8 of the speed reducer 4 and a screw feeder 12 pass through the inside from the upper end to the lower side surface. The cooling water passages 16 and 16 are formed at the upper end of the rotating shaft 8 so as to be rotatable.
A hose 15 for supplying cooling water is connected via a joint 13 and spray nozzles 20, 20 for spraying cooling water on the surface of the pressure rolls 1, 1 are provided in the pressure rolls 1, 1 with a view. Metal scrap briquetting machine characterized by the following: