| 摘要 |
<p>A plastic extruder-welding unit employing e.g. a hydraulic motor has separate supplies and a control trolley joined to it through sheathed umbilicals. Preferred features: A hydraulic power pack (31) is connected to the motor through flow and return hoses (33, 34), which are sheathed (4) together. Further hoses and leads are included in the sheath. A hot air hose is used to pre-heat the seams. A braided wire hose supplies a continuous plastic welding rod. Electrical leads supply current to an air heating unit (24) and/or are used for control of the hydraulic motor. A hydraulic pump is connected to the ends of the hoses. This is mounted on rollers. The power pack has a mounting (35) for the reel of plastic rod. An air supply unit is included on the trolley. Speed and/or bypass controls are incorporated for the hydraulic pump, a speed adjustment unit is included at the welder, and connected to the controllers through a line. A control circuit holds the speed constant.</p> |
