Green sand single box feederless foundry method for glass mold

Abstract

The invention discloses a green sand single box feederless foundry method for a glass mold and belongs to the field of glass mold foundry. The method comprises the following steps: firstly, positioning sand cores are manufactured; then a wood pattern template provided with a pair of bottom molds, sand core matrixes, pouring gate molds as well as a filter screen gap is manufactured according to the size of the blank of the glass mold; the wood pattern template is fixed on a moulding machine, a frame is arranged on the wood pattern template in a covering manner, one positioning sand core is respectively placed on the sand core matrixes at two ends of the bottle molds, and a filter screen is placed into the filter screen gap: the frame is filled with green sand, and the moulding machine is opened. The wood pattern template and the frame filled with the green sand are over turned, and the wood pattern template is removed; a releasing agent is sprayed into the bottle cavities of the bottle molds; molten iron is poured from the pouring gate mold cavities of the pouring gate molds, the frame, a chiller sand core and the positioning sand cores are removed, and the blank is obtained after the green sand is removed; and the pouring gate iron is removed, and the glass mold is obtained. The utility model has the advantages that the raw materials are saved; the finish of the inner chamber surface and the parting surface of mold are improved; the casting cost is lowered; and the environmental conservation is achieved.

Description

technical field [0001] The invention belongs to the technical field of glass mold casting, and in particular relates to a method for casting a glass mold from a single box of green sand without a riser. Background technique [0002] Sand casting is widely used in cast iron casting methods, sand casting accounts for about 60-70% of the total castings, and sand casting can be divided into clay sand mold, organic binder sand mold, resin self-hardening sand mold and lost foam casting method, etc. etc. Among them, about 70% adopt clay sand casting method. The clay green sand casting method is not only suitable for most metal materials, but also more economical. The weight of clay green sand casting can range from several kilograms to tens of kilograms. Because the existing clay green sand molding machine has excellent performance, it can produce green sand molds with strict requirements and small allowable errors. In view of this, the current glass mold castings are almost all ...

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Problems solved by technology

However, there are still the following shortcomings. First, due to the need to rely on expensive equipment, resulting in high production costs; second, it is not environmentally friendly, because the production site not only produces dust, but also produces furfuryl alcohol, free formaldehyde and phenol. The positive rate of respiratory irritation symptoms such as cough, expectoration, chest tightness and shortness of breath increased, and even caused the positive rate of neurasthenia symptoms such as headache, dizziness, insomnia, memory loss and heart palpitations among workers, and the pulmonary ventilation function decreased (P<0.05). health also affects

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