DE1953095B2 - Mixer for processing plastics - Google Patents

Description

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TSinaccording to Claims 1 or 2, thereby characterized in that between air inlets (5) in the area of the end of the bore (3 «) of the double-walled hollow shaft (3) and a pressure fan (12) is arranged in the heating zone (6).

The invention relates to a mixer for processing plastics according to the preamble of Claim 1.

In the case of mixers for processing plastics, it is known that there is something in the mix Moisture settles on the inside of the lid as condensation. From there the condensation drips back in the mix and thus spoil the quality of the end product. In order to remedy this, you have known to heat the mixer lid sufficiently. The heating of such a lid is because of the many openings for flanges and internals very expensive and still has the disadvantage that the moisture remains in the mixture.

To avoid condensation approach to the mixer cover, has also been the Mischerdekf. ^^ _{nd and up o} f a slight gap to go ^on £ ⁿ * "* · _{hen wobe} i the he of the interior are these." Nreicnen _{'elinnenfläche gebi finished! Ka} . The profU una a ^ _{d long-walled hollow} .

^ LT wave and an upstream Outside air and the through the

^ _{the outer surface of} the inner ^ jg ^^ "^ _the ^^

lying «™ ϊ hollow shaft with the

«Um der dcpp ^ wan | connected is

«G ^ SAnSdiig is made with little construction through diesJ Aibwui P ^ j ^ ^ ^

£ _{'nd s} kh on the container lid _only ^ _Back

hindered, but instead led away.

^^ jSÄSd «Invention is on _a5 * ^^ ggien Profi's an over grinding Γ Χ.""Η Hol with a power supply connect- l ™ f * ° ^ _m ^ Z This can also be a

Barer ^Hei ^ ^st _n ^a _n ^b _r ^ 2seranfall gestärkerer to evaporate Kondenswasseraniau ^ u done ^we J ^d? \ _tdurchsatz

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can be, st it in

finaung ^z J ^ec i ^ ^a _H ^ß ' ^g Vndes
nungirn area ^ ₅ end ^

walled hollow shaft una a

^ iSX ^ d explained by an embodiment based on the drawing. 1 shows a vertical section through the lid of a mixer,
2 shows a section along the line AB in

^J Fig3 g a section along the line AB in F i. 1, but with a built-in heating element.

As can be seen from Fig.l, is on the cover 1 of the mixer, the bearing housing 2 fastened in the a double-walled hollow shaft 3 is rotatably mounted.

The ^ f ^ j ^^ lÄ ^ S

_reinforce , so too

Bore the r bore of the

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u »„ one 6 which
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Profiles 8 α andJ
Hol ^ wave 3

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room 3 ^
the. the

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STDer iS covers the arranged in the hollow shaft 3 g ^a consisting of the

over arm, _do p _pelwandigen

» ^Lst ™ ^ _ha S _r ice-shaped semi-elliptical profile 8a S continuously ver

ü 8fc is connected to the hollow shaft

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3 b is

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zen 10 α of the fan 10 is flanged. In the cover 4 an additional fan 12 is arranged, which the outside air through the air inlet openings 5 and blows into the hollow shaft 3. The arm 8 is given by the attached at its free end and the wall scraper 7 immersed in the circulating material to be mixed with a rotary movement.

In Fig. 3, the heating rod U, which is arranged on the booth of the inner profile 8 fc, is shown.

The space delimited by the inner surface of the cover 1 and by the profile 8 b is called channel 15, and the space delimited by the profiles 8 a and 8 6 is called channel 16.

There are 1 condensation droplets on the inside of the lid in the process of being created or already present, these are sucked in by the channel 15 Hot air evaporates, the resulting steam being discharged through channel 16. With especially strong condensation can be caused by the in Fig. 3 shown heating rod to the heat supply

ίο the circumferential evaporation zone is still significantly increased will.

1 sheet of drawings

Claims (2)

there is also the disadvantage here that the moisture claims: 1. Mixer for the preparation of plastics with a standing container provided for the turbo-shaped circulation of the material to be mixed with a ready-to-drive, rapidly rotating tool and an arm which is rotatably mounted in its lid on a WeUe, reaching up to the container wall and on which a wall scraper is arranged, characterized in that the arm (8) consists of two differently sized profiles (8 «8 b) lying one inside the other, which are open to the cover (1) and extend to this up to a small gap = m, with the one from channel formed by the internal professional (8 b) and the inner surface of the lid 15) via the bore (3 a) of the double-walled hollow shaft (3) and an upstream heating zone (6) with the outside air and the duct (16 ) formed by the outside ProW (Sa) and the outside surface of the inside profile 8 b) ) via the shell space (3 b) 3 double-walled hollow shaft (3) groove «tan suction nozzle (10«) of a fan (10) connected ^{which is} , 2. Mixer according to claim 1, characterized draws that on the bottom of the inner profile (8 b) a via sliding contacts or the like. Connectable to a power supply heating rod (11) np ^ rfinSTiiegt the task of preventing the dripping of condensation from the Mischerdekf "™ ⁰ ^ _M Jchung. ^kel J? ™ ^c f ^r . _Be ^ d _after the invention thereby , "Γ ~, * β the arm made up of two differently sized, ingelostJ"? "^ ^^ ^ _m ^^