(CN106216612) 本发明涉及汽车排气管加工技术领域，具体是涉及种汽车排气弯管铸造方法。①、根据汽车排气弯管形状及构造，制作模型及铸造浇道；②、在耐高温砂中加入石油树脂，均匀混合；③、将步骤①设计好的模型用石蜡制作成型，模型于通风位置放置1‑3天；④、将石英砂涂在模型上，使石英砂附着在模型表面，然后放入浇道中，再向浇道中浇入铁水以铸造成型排气弯管；⑤、将成型的排气弯管放入烘烤箱中烘烤1小时，使石蜡熔化；⑥、对排气弯管依次进行打磨、清洗、抛光处理；⑦、向排气弯管表面喷涂保护液，得到成品。本发明通过合理选择砂型铸造的工艺参数及工序，使制作的排气弯管的质量较高，同时通过保护液的处理，可使产品的表面平整度得到显著提升。
(CN106216612) 1. An automobile exhaust gas elbow casting method, characterized in: comprising the steps of: -1, in accordance with automobile exhaust elbow shape and construction, making model and casting runner; -2, on a refractory sand was added petroleum resin, uniformly mixed; -3, the step-1 designed model mold making with paraffin, model for ventilation position placed 1-3 days; -4, the quartz sand coating on the former, the quartz sand adhering to the mold surface, and then placed in the runner, and then poured into the exhaust elbow to the runner in the molding by casting molten iron; -5, 1 hour roasting chamber is baked in an exhaust elbow placed in the mold, the wax was melted; -6, the exhaust elbow in turn is subjected to polishing, cleaning, polishing treatment; -7, a protection solution sprayed into the exhaust elbow surface, to yield a finished.
(CN106216612) LEGAL DETAILS FOR CN106216612 Actual or expected expiration date=2036-08-31 Legal state=ALIVE Status=PENDING Event publication date=2016-08-31 Event code=CN/APP Event indicator=Pos Event type=Examination events Application details Application country=CN CN201610779898 Application date=2016-08-31 Standardized application number=2016CN-0779898 Event publication date=2016-12-14 Event code=CN/A Event type=Examination events Published application Publication country=CN Publication number=CN106216612 Publication stage Code=A Publication date=2016-12-14 Standardized publication number=CN106216612 Event publication date=2016-12-14 Event code=CN/C06 Event indicator=Pos Event type=Examination events Publication Event publication date=2017-01-18 Event code=CN/C10 Event type=Examination events Request of examination as to substance
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