A mold structure in which the core of the lampshade is released first and the top is fed

Abstract

The invention relates to a mould structure of mold core pre-demoulding top feeding of a lamp cover. The mould structure of mold core pre-demoulding top feeding of the lamp cover comprises a fixed mould, a moving mould and a large core. The fixed mould is arranged at the upper end of the moving mould. The large core is arranged at the upper end of the moving mould and the middle of the fixed mould. The upper end of the large core is connected and fixed with an upper mould board. The space among the fixed mould, the moving mould and the large core forms a mould cavity. The right side of the upper end of the fixed mould is fixed with a runner base plate. The space between the upper mould board and the flow channel base plate forms a main runner. One end of the main runner is communicated with a feeding inlet arranged on the right side of the upper mould board. The other end of the main runner is communicated with the space formed by the upper end of the mould cavity, the large core and the fixed mould through a plurality of branch runners. The mould structure of mold core pre-demoulding top feeding of the lamp cover is simple in structure, top feeding is utilized, rate of finished products of die casting production is increased and service life of the mould is prolonged.

Description

technical field [0001] The invention relates to the field of die-casting molds, in particular to a mold structure in which the core of a lampshade is demoulded first and top feed is fed. Background technique [0002] Die-casting molds are used in the production of various industrial products, such as a lampshade. The wall thickness of the lampshade is generally thin, the appearance requirements are high, and the surface cannot have defects such as cold shuts. Existing die-casting molds generally adopt a two-plate structure, and the runners are set on the parting surface. Due to the thin wall of the casting, the height is high, and there are convex and concave platforms on the top of the casting. It is difficult for the molten aluminum in the ordinary flow channel to climb to the top, and it is easy to trap air at the convex and concave platforms, resulting in defects such as cold shut and air holes in the product. In addition, due to the excessive tightening force of the lar...

AI Technical Summary

Problems solved by technology

It is difficult for the molten aluminum in the ordinary flow channel to climb to the top, and it is easy to trap air at the convex and concave platforms, resulting in defects such as cold shut and air holes in the product. In addition, due to the excessive tightening force of the large core of the fixed mold, the casting is easy to be strained when it is demolded. , cracking, affecting the quality of the product

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