Mold making requirements for fully automatic horizontal parting casting molding machine

The mold of a fully automatic horizontal split casting molding machine is a double-sided mold. Generally, aluminum molds with lighter materials are used, and steel molds are also used. The transition from traditional semi-automatic molding machines to fully automatic horizontal split casting molding machines. The fundamental difference is that the automatic molding machine uses a hydraulic cylinder to perform one-time high-intensity extrusion of the molding sand inside the sand box. There are certain requirements for the hardness and strength of the mold. In order to avoid compaction pressure during the sand mold compaction process If the mold is damaged when enlarging, we recommend that the thickness of the fully automatic casting molding machine mold be between 25mm and 35mm; at the same time, we have also written some instructions and judgments for effectively protecting the mold in the cylinder compaction program of the molding machine. For casting companies that purchase our equipment, we will require users to customize molds equipped with automatic casting molding machines based on the mold size drawings provided by us, which will facilitate the normal mass production of automatic casting molding in the future;

（As can be seen from the example shown in the above figure, most of the shapes of castings on the mold are concentrated on one side of the mold, and the castings are in a raised state and high in height. When making the mold, the raised side of the casting can be lowered, that is, a concave surface can be made at the bottom of the casting to lower the height of the mold, so that the overall height of the sand mold after molding is reduced, saving the use of molding sand. At the same time, there are ventilation holes on the side of the mold, which are ventilation holes Vertically connected to the exhaust plug on the mold, its function is to accelerate the discharge of gas inside the sand box during sand shooting, avoiding the compression of remaining gas and molding sand during compaction）

Users can consult us for detailed information about mold production. We can give you some suggestions based on the structural requirements of the product castings and matters needing attention in mold production as a reference. We can also provide you with dimensional specification drawings of various types of fully automatic horizontal molding machine molds, such as the thickness of the mold, the draft angle of the mold, etc. A gap of at least 30mm should be reserved between the casting and the casting or molten iron flow channel to avoid insufficient molding sand gap in the mold cavity, which may easily produce defective castings after pouring; and the gap between the casting and the edge of the sand mold should ensure a molding sand gap of more than 40mm to avoid Overflow of molten iron and damage to the sand mold; when making the mold, you should also consider designing the diameter of the molten iron inlet and the flow direction of the molten iron during pouring. According to the flow direction of the molten iron and the structure of the casting, reserve an outlet for the sand mold to discharge the air inside the cavity during pouring. holes, and the molten iron can be replenished in time during the cooling process after pouring; if the casting is more complex, we should process and design exhaust holes on the mold to achieve the effect of timely exhaust and drainage during sand box shooting; including designing concave and convex holes in the early stage of mold development based on the pouring system The lower mold height of the model reduces the difficulty in sand-shooting molding and the amount of molding sand used. While controlling the proportion of molding sand and iron to reduce costs, it can better complete the production of more complex casting products and take into account the control of casting yield.

(As shown in the red circle position in the above figure, the mold did not reserve enough margin for edge molding sand during production. In automated molding, when the casting sand has poor fluidity or is relatively rough, it cannot be adequately replenished during compaction, which will cause problems such as loose and poor compactness of the molding sand at that position, and easily lead to problems such as the flow of molten metal from that position during pouring.)