Novel device and method for moulding pipe

Abstract

The invention provides a novel device for moulding pipes, which is applied to the field of pipe processing. The novel device for moulding pipes comprises a straight sprue (1), an inner sprue (2) and a riser (3). The device is characterized in that the novel device for moulding pipe also comprises a pipe sand mold (4); one or more straight sprues (1) are communicated with one or more inner sprues (2); the inner sprue (2) is communicated with the pipe sand mold (4) which has a clearance structure formed by dual-layer materials; and the pipe sand mold (4) is communicated with one or more risers (3). The invention also relates to a method for moulding the pipe simultaneously. By adopting the technical proposal, the formation of pore defect of the casting can be reduced, the process stability is improved, the process yield of the casting is improved, the cost is reduced, and the labor productivity and efficiency can be greatly improved, thus reducing the cost of the product.

Description

Technical field [0001] The present invention relates to the field of pipe fitting processing in the field of mechanical processing. More specifically, the present invention relates to a new type of pouring device for pipe fittings. The present invention also relates to a method for pouring such pipe fittings. Background technique [0002] In the prior art, the pouring device in the sand casting of pipe fittings usually includes a sprue, a cross runner, an inner runner, and a riser. In sand casting, the forming process of the pipe fitting pouring device is: in the moulding process, a sprue is formed with a gate rod, and an inner runner, a runner mold, and a riser die are placed on the mold to form the pipe together during the moulding process Pouring device. Figure 5 Shown is a schematic cross-sectional structure diagram of an existing sand pipe fitting pouring device. The entire pouring device is composed of a straight gate, an inner gate, a riser, a riser neck, a core, a sand mo...

AI Technical Summary

Problems solved by technology

Due to the difference in the quality of molding sand and the ability of people to operate, it is inevitable that there will be loose molding sand in the mold. Therefore, the gating system formed by the process method in the prior art often causes trachoma, sand inclusions, Casting defects such as sticky sand, slag inclusions, air holes, iron beans, mold lifting, shrinkage cavities, shrinkage porosity, cold shut, insufficient pouring, deformation, cracks, etc., which lead to more waste products of pouring pipe fittings, thus contributing to the stability and improvement of product quality formed a barrier

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