Impeller mould for pump

Abstract

The invention belongs to the technical field of pump machining, and discloses an impeller mould for a pump. The impeller mould comprises an upper mould, a plurality of plug pieces and a bottom mould,a material cylinder is mounted on the lower part of the outer side of the upper mould in a sleeving mode, a mandrel sleeve is mounted on the inner side of the bottom mould in a sleeved mode, a mandrelis detachably mounted on the inner side of the mandrel sleeve, a counterbore is formed in the top of the mandrel, a shoulder is arranged on the upper part of the mandrel sleeve, a circular arc surface is arranged on the lower part of the shoulder, the plug pieces are clamped at the top of the shoulder, the ends of the plug pieces are detachably connected with the bottom mould and the material cylinder, and impeller spaces for pressing an impeller are formed among the inner side of the upper mould, the upper die, the plug pieces and the top of the mandrel as well as between the plug pieces andbetween the bottoms of the plug pieces and the inner side of the bottom mould. The circular arc surface is arranged on the mandrel sleeve to compensate circular arcs on the plug pieces, manufacturingis convenient, the structure is simple, a circular arc is formed at an impeller inlet subjected to compression moulding forming, and the flow and efficiency of the pump are ensured. Performance parameters of the pump are ensured.

Description

Technical field [0001] The invention relates to the technical field of pump processing, in particular to an impeller mold for pumps. Background technique [0002] The flow path width of the closed impeller of centrifugal pump gradually decreases from the impeller inlet to the impeller outlet. For the impeller that is molded by compression, the plug in the mold is difficult to extract from the outlet. Generally, the plug must be divided into two pieces, even then Remove the arc at the inlet of the plug. The thickness of the plug is greater than the outlet of the impeller. After molding, the plug cannot be drawn out at all. Eventually, there is no arc at the inlet of the impeller, resulting in low flow and low efficiency of the pump. The existing technology cannot solve the above problems. technical problem. Summary of the invention [0003] The purpose of the present invention is to solve the problems existing in the impeller mold in the prior art, and provide an impeller mold for...

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Problems solved by technology

[0002] The closed impeller of centrifugal pump decreases gradually from the impeller inlet to the impeller outlet. For the molded impeller, it is difficult to pull out the plug in the mold from the outlet. Generally, the plug must be divided into two pieces. Remove the arc at the inlet of the plug, which is responsible for the thickness of the plug being greater than the outlet of the impeller. After molding, the plug cannot be pulled out at all, and eventually there is no arc at the inlet of the impeller, resulting in low flow and low efficiency of the pump. The existing technology cannot solve the above problems. technical problem

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