| 摘要 |
Various plastic components are plasticized, then injected into mold (s). A stage is omitted from the cycle, in which dosing assemblies are moved to the injection molds. An independent claim is included for equipment making the brushes. Flow paths between nozzles of the respective dosing units (A-D) and the allocated cavities (1-8), are identical. Preferred features: Plastic components are injected through hot channel nozzles. They are effectively plasticized and/or injected downwardly. Flow channel(s) discharging into the cavities are closed by a needle, before extraction of the plastic article. The various plastic components are injected using essentially the same pressure profile. They are injected through identically-controlled dosing units. All dosing units are driven from a common hydraulic pressure source, at least for injection of the various plastic components. Control valves provided at the dosing units are adjusted from a central control unit. A distributor (V) connects nozzles and cavities. Numbers of second mold cavities identical to the first, are similarly connected with second dosing units. The first dosing units are identically constructed and are connected to the central control unit (S). Dosing units (A-D) are detachable from the molds; their nozzles are screwed to the molds (W).
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