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Resin Mixing and Degassing Station: Vacuum Vessel with Worm and Apron
W. Hedrich · Public domain (expired patent)
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Mary

23. Oktoba 2026FI
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Resin Mixing and Degassing Station: Vacuum Vessel with Worm and Apron

W. Hedrich's mixer (US 4,049,244, 1977) for reactive resins that must be mixed and freed of gas before they set. In a vessel under vacuum a worm lifts the resin up a central tube and spills it over a cone-shaped apron in a thin layer, where the gas escapes; vanes on the worm sweep the funnel bottom and keep it circulating. Peltier elements on the vessel, tube and apron heat or cool each zone. Reversed, the worm drives the batch out through the bottom valve. The patent gives no sizes, vacuum, speeds or temperatures; it describes an industrial vessel. The picture: the patent's Fig. 1.
Juu
5 days

Maagizo

1

Fit the vessel's neck valve and vacuum pipe

Use a metal vessel, cylindrical above with a funnel bottom about one third of its height, ending in a short neck. Fit the discharge valve (4) on the neck, and a side vacuum pipe (11) near the top with a baffle plate (12) inside to keep solids out of the vacuum line. Ours: TIG welder.

Vifaa kwa hatua hii:

Tangi la kuchanganya lililofungwaTangi la kuchanganya lililofungwa1 kipande
Vali ya mpiraVali ya mpira1 kipande
Bomba la chuma cha puaBomba la chuma cha pua1 kipande
Bati la chuma cha puaBati la chuma cha pua1 kipande

Zana zinazohitajika:

Mashine ya kulehemu ya TIGMashine ya kulehemu ya TIG
Spana inayoweza kurekebishwaSpana inayoweza kurekebishwa
2

Make the mixing tube and apron

Join a downward-flaring cone apron (8) to the upper end of a tube (7), braced by struts (6a). Hang the tube on struts (6) from the cover.

Vifaa kwa hatua hii:

Bomba la chuma cha puaBomba la chuma cha pua1 kipande
Bati la chuma cha puaBati la chuma cha pua1 kipande

Zana zinazohitajika:

Mashine ya kulehemu ya TIGMashine ya kulehemu ya TIG
3

Fit the cover's inlet, window and bearing

Fit the removable cover (5) with an inlet fitting (5a) that seals vacuum-tight, a viewing window (5b) with a watch glass to watch the degassing, and a bearing (5c) for the worm shaft; seal it to the vessel.

Vifaa kwa hatua hii:

Mfuniko wa chomboMfuniko wa chombo1 kipande
Nipo yenye hesi ya bombaNipo yenye hesi ya bomba1 kipande
Kioo cha saaKioo cha saa1 kipande
Fani ya MipiraFani ya Mipira1 kipande
Gasketi ya kuzibaGasketi ya kuziba1 kipande

Zana zinazohitajika:

Spana inayoweza kurekebishwaSpana inayoweza kurekebishwa
4

Fit the worm and its vanes

Pass the worm (3) down through the tube so it just sticks out at the top and reaches into the neck close to the valve. Below the tube, fix agitating vanes (2) on arms (2a) so they sweep close to the funnel wall, steadied by struts (10) on a bearing (10a) riding on the tube.

Vifaa kwa hatua hii:

Kisafirishi cha skrubuKisafirishi cha skrubu1 kipande
Bawa la kukorogaBawa la kukoroga2 vipande
Bushi ya chumaBushi ya chuma1 kipande

Zana zinazohitajika:

Spana inayoweza kurekebishwaSpana inayoweza kurekebishwa
5

Mount the reversible drive on the cover

Mount a reversible variable-speed motor (M) with reduction gearing (RG) on the cover, driving the worm shaft: one way lifts resin up the tube, the other drives it out of the valve.

Vifaa kwa hatua hii:

Mota ya umemeMota ya umeme1 kipande
Gia boksiGia boksi1 kipande

Zana zinazohitajika:

Spana inayoweza kurekebishwaSpana inayoweza kurekebishwa
6

Fit the Peltier elements

Fit Peltier elements in electrical contact with the metal in separately switched sets: round the top of the vessel (20), its lower cylinder (21) and its funnel (22), and along the tube and on the apron (23-26), best on the apron's upper face. Reversing a set's polarity swaps heating for cooling.

Vifaa kwa hatua hii:

Kipengele cha PeltierKipengele cha Peltier1 kipande

Zana zinazohitajika:

Spana inayoweza kurekebishwaSpana inayoweza kurekebishwa
7

Connect the vacuum and run a batch

Connect the vacuum pipe to a vacuum pump. With the vessel under vacuum, add the resin components one after another through the inlet; the worm lifts the mix over the apron in a thin layer, and the funnel stays full while it circulates. Reverse the worm with the valve open to empty it.

Zana zinazohitajika:

Pampu ya utupuPampu ya utupu

Vifaa

15

Zana Zinazohitajika

3

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