A High Concentricity Composite Insulator Injection Mold

Abstract

The invention relates to a high-coaxiality composite insulator injection mold which comprises an upper die and a lower die, wherein a sprue and a runner are arranged in the injection mold, the two dies are assembled so as to form an injection mold cavity, the top of the upper die is provided with a feed hole, the center of the injection mold cavity is provided with a mandril accommodating cavity, the mandril accommodating cavity is cylindrical, the circumferential outside of the mandril accommodating cavity at the position of the sprue is also provided with multiple thimbles, each thimble points to the shaft center of the mandril accommodating cavity, and the thimbles are annularly and uniformly distributed around a mandril by taking the shaft center of the mandril accommodating cavity as a circle center, and staggered with the sprue; and each thimble is composed of a slide block, an ejector rob and a guide seat, one end of the guide seat is fixedly connected with a drive cylinder, the other end of the guide seat is connected with the slide block, the guide seat fits with the slide block, the slide block can move forwards and backwards along the guide seat, and the other end of the slide block is fixedly connected with the ejector rob. The injection mold disclosed by the invention has the advantages that by using the mold, in the process of injecting, the mandril is not deformed due to the impact of plastics, so that the axial line of the mandril is always located at the central position of the mold cavity, thereby ensuring the high coaxiality of the mandril and the center of the mold cavity, and guaranteeing the quality of products.

Description

technical field [0001] The invention relates to a composite insulator injection mold, in particular to a composite insulator injection mold with high coaxiality. Background technique [0002] Composite insulator is a special insulation control that can play an important role in overhead transmission lines. Composite insulators are also called synthetic insulators, such as figure 1 As shown, its main structure consists of three parts: shed 1, sheath 2, epoxy glass fiber (ERP) mandrel 3 and end fittings 4. Among them, the umbrella skirt 1 and the sheath 2 are made of high-temperature vulcanized silicone rubber, the ERP mandrel is a glass fiber reinforced plastic composite material with glass fiber as a reinforcement material and epoxy resin as a matrix, and the end fittings are carbon steel coated with hot-dip galvanized layer on the outer surface. Plain cast steel or carbon structural steel. [0003] The preparation process of the composite insulator shed includes: rubber m...

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Problems solved by technology

[0007] It is hereby explained that this invention is mainly used to solve two problems: one is that the long composite insulator product will deform due to its own weight after being placed in the mold cavity due to the long mandrel, and the other is to prevent the mandrel from being displaced or deformed due to the rubber pressure during injection. This aspect is reflected in the patent

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