Electric power well lid die-casting die

Abstract

The invention discloses an electric well lid die-casting die. The electric well lid die-casting die comprises a die-casting device used for casting a workpiece. The die-casting device comprises a box body, a groove, a hydraulic oil tank, hydraulic rods, a lower die body, ejector rods, an upper die body, a pouring pipeline, a connecting pipe, a first one-way valve, a pushing block, a reset spring, a baffle and a pushing rod, wherein the groove is formed in one side of the box body; the hydraulic oil tank is fixedly connected into the box body, the hydraulic rods are fixedly connected to the hydraulic oil tank, the lower die is fixedly connected to the output ends of the hydraulic rods, the ejector rods are fixedly connected to the hydraulic oil tank, the pouring pipeline is arranged in the lower die, and the connecting pipe is fixedly connected to the hydraulic oil tank; and the first one-way valve is fixedly connected to the connecting pipe. The die-casting die has the advantages that the lower die and the upper die are combined through the hydraulic rods, so that displacement of the upper die and the lower die in the die-casting process is effectively prevented, and therefore the product percent of pass is increased.

Description

technical field [0001] The invention relates to the technical field of die-casting molds, in particular to a die-casting mold for an electric manhole cover. Background technique [0002] Manhole covers are used to cover roads or deep wells in homes to prevent people or objects from falling. According to the material, it can be divided into metal manhole covers, high-strength fiber cement concrete manhole covers, resin manhole covers, etc. It is generally round and usually made by die casting. [0003] The patent with the application number CN201711453887.X discloses a manhole cover die-casting mold, which includes a vertically arranged column, the upper end of which is fixedly connected by a horizontal beam, and a cylinder is fixedly installed on the column, and the output end of the cylinder Set downwards and fixedly install the connecting plate. [0004] There are some defects in this patent: 1. The upper mold and the lower mold of this invention are not provided with s...

AI Technical Summary

Problems solved by technology

[0004] There are some defects in this patent: 1. The upper mold and the lower mold of this invention are not provided with sprues. If the molten metal is directly poured into the lower mold, it is easy to cause a safety accident. 2. Since the lower mold can rotate, there is no Setting up the fixing device will cause displacement of the upper mold and the lower mold during the die-casting process, which will affect the product qualification rate. 3. Impact will occur during the contact between the wooden board and the manhole cover, and all the burrs on the manhole cover cannot be removed, and rework is required. Affect production efficiency

Images