Crushing/discharging device for materials being dried in a multi

Solid material comminution or disintegration – Apparatus – With temperature modification of material

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Details

241223, 241243, B02C 1806

Patent

active

044176970

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

The present invention relates to a device for the purpose of crushing and taking out dried products of a highly viscous, heat-sensitive material such as concentrated whole milk, concentrated fruit juice, etc. supplied onto a plural-stage belt conveyer arranged in a vacuum chamber, after said material has been dried and solidified by means of a heating member while being moved along by said moving belt conveyer.


BACKGROUND ART

Such devices as mentioned above have hitherto been known, and as an instance thereof, there can be cited a device disclosed previously by the applicant of the present invention in Japanese Patent application No. 37699/1978 (Laid-open Application No. 129558/1979) hereinafter referred to as the previous invention. To begin with, said previous invention will be explained with reference to FIGS. 1 through 3 of the appended drawings.
Among the reference numerals in these drawings, 1 denotes a vacuum chamber, which is provided with an exhaust port 2 disposed on the top and a discharge port 3 for taking out the crushed dried product disposed on the bottom. Upper and lower belt conveyers 6 for conveying the material being dried are arranged in multistage fashion and each belt is stretched between a driving roll 4 and a guide roll 5 to move in the direction of the arrow. The return stroke side of each belt is disposed spaced from the feed stroke side. This belt 6 is desirably made of glass cloth coated with polytetrafluoroethylene and subjected to surface treatment for electrostatic charge prevention. Heaters 7 are disposed below the lower face of each belt 6 and above the upper face of the uppermost belt 6 by leaving spaces between the belts. Above the uppermost heater 7 and under the lowermost heater 7 there are disposed reflectors 8 respectively. On the upper face of each belt 6, there is provided a feed nozzle 9 for the material to be dried disposed ahead of the heater 7 along the direction of movement of the belt. To the rear of the heater 7 there are provided a crushing roll 10 disposed to correspond to a belt supporting base 11 installed on the lower face of each belt 6 and an angle scraper 12 for the purpose of scraping the crushed, dried material from the surface of the belt 6 and removing it to both sides of said belt. On both sides of each belt 6 there is provided a guide plate 13 respectively in armor-sleeve fashion in order to prevent the crushed, dried material from attaching to the lower face of the belt 6.
In addition to the above described previous invention, there is known another device such as shown in FIG. 4 which has also been developed by the present inventors. This invention is, so to speak, a modification of the previous invention, wherein a different crushing/discharging device is installed instead of the crushing roll 10, belt supporting base 11, scraper 12 and discharge port 3 of the device of the previous invention. (This modification is hereinafter referred to as the `previous proposition`.) Details of this invention will be explained in the following.
In this crushing/discharging device, a rotary cutter 10' is disposed above the driving roll 4 for the belt 6, and this cutter 10' is always being pulled in the direction of the driving roll 4 by means of a spring 14 in order to crush a matlike dried material moving along the belt 6 as it rotates.
The dried material crushed in this way is scraped off by a scraper 12' installed to the rear of the cutter 10', collected by a ductlike chute 13' and allowed to fall down.
The dried material thus fallen is collected into a collecting hopper 16 disposed at the lower opening of the chamber 1. In this hopper 16 there is provided a rotary cutter 19 having a perforated metal retainer 18 around it which is driven by an air motor 17. The dried material thus collected into the hopper 16 is crushed by the rotary cutter 19 and, after having been regulated in grain size by passing through the perforated metal retainer 18, is taken out of the apparatus.
In the case of such a crushing device, however, when the matlik

REFERENCES:
patent: 662350 (1900-11-01), Bussels
patent: 3762256 (1973-10-01), Frantz

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