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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.
高级
5 days
说明
1
1
Fit the vessel's neck valve and vacuum pipe
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.
此步骤所需材料：
混合罐1 个
球阀1 个
不锈钢管1 个
不锈钢板1 个所需工具：
氩弧焊机
活动扳手2
2
Make the mixing tube and apron
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.
此步骤所需材料：
不锈钢管1 个不锈钢板1 个所需工具：
氩弧焊机3
3
Fit the cover's inlet, window and bearing
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.
此步骤所需材料：
罐盖1 个
软管螺纹接头1 个
表面皿1 个
滚珠轴承1 个
密封垫1 个所需工具：
活动扳手4
4
Fit the worm and its vanes
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.
此步骤所需材料：
螺旋输送器1 个
搅拌叶片2 个
金属衬套1 个所需工具：
活动扳手5
5
Mount the reversible drive on the cover
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.
此步骤所需材料：
电动机1 个
齿轮箱1 个所需工具：
活动扳手6
6
Fit the Peltier elements
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.
此步骤所需材料：
帕尔帖元件1 个所需工具：
活动扳手7
7
Connect the vacuum and run a batch
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.
所需工具：
真空泵材料
15- 1 个占位符
- 1 个占位符
- 1 个占位符
- 1 个占位符
- 1 个占位符
- 1 个占位符
- 1 个占位符
- 占位符
- 1 个占位符
- 1 个占位符
- 2 个占位符
- 1 个占位符
- 1 个占位符
- 1 个占位符
- 1 个占位符
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