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在分析目前世界上较先进的水平分型无箱造型机的造型方法的基础上,为解决所存在的下芯时间不充裕,下芯操作不方便,以及结构复杂等问题,提出以砂型本身侧面作为合型基准新概念,并按此概念设计制造了一台铸型尺寸为800×600×(150～250)/(150～250)毫米的水平分型无箱造型机,其造型方式是:下型采用底射加砂,模板自上而下直接加压(挤压方式),造型之后砂型从砂箱侧面推出;上型则采用顶射加砂,模板自下而上直接加压,并采用二个砂箱交替造型。上、下造型机的布置是从侧面推出的下砂型能按一型推一型的方式,正确地进入合型二位,而上型造型机的二个砂箱,一个在造型时,另一个在合型工位上,其高度高于下型,即在合型工位处,上下型重叠,合型方式是下型升起,进入处于其上方的上砂箱中与上型合上,并一起托出上砂箱,然而被推出。这样,下型离合型工位愈远则下芯的时间也愈充裕,而对造型机的结构与动作无影响。该机的造型方式通过生产性试验证明,能满足工艺要求,不产生明显的错边,这种方式的特点是既能保证有较充裕的下芯时间,而且结构简单,其次是采用模板直接加压紧实,紧实力充分利用,砂型紧实变分布更符合工艺要求,第三,造型动作简单,并分散在三个工位上,因而具有高生产率的先天条件。
On the basis of analyzing the modeling method of horizontal boxing machine in the world, in order to solve the problems such as insufficient time for under core, inconvenient core operation and complicated structure, According to this concept, a horizontal type boxless molding machine with a mold size of 800 × 600 × (150 ~ 250) / (150 ~ 250) mm was designed and manufactured according to the concept. The modeling method is as follows: Under the model using the bottom spray plus sand, the template directly from top to bottom pressure (extrusion method), after the sand mold from the sandbox side launched; the top is the top shoot sand, the template directly from bottom to top pressure and Using two sand boxes alternating shape. Upper and lower molding machine layout is pushed out from the side of the sand can push a type of push-type approach correctly into the type two, while the molding machine two sand boxes, one in the modeling, the other In the station, its height is higher than the next type, that is, at the type station, the upper and lower overlap, the type of lifting is the next type, into the upper flask in the upper and closed on the type, And put together on the sand box, but was launched. In this way, the next clutch type station farther away from the core of the more time, but the shape of the machine structure and action no effect. The machine’s modeling method through the production test proved that to meet the process requirements, does not produce obvious wrong edge, this method is characterized by both ensuring ample core time, and the structure is simple, followed by the template directly Compaction, tightening the full utilization of sand compact distribution is more in line with technological requirements, the third, modeling simple action, and scattered in the three stations, which has high productivity of the innate conditions.