Rubber wall bushing processing mold

Abstract

The invention discloses a rubber wall bushing processing mold. The rubber wall bushing processing mold comprises an upper mold, a lower mold, an oil cylinder, a guide sleeve and a guide rod. A plurality of spindle-shaped chambers are formed in the upper mold, and a plurality of spindle-shaped chambers are formed in the lower mold. Flange grooves are formed in the upper ends of all the lower mold chambers. Rubber filling holes are formed in the body of the mold. Positioning mechanisms are installed at the bottoms of all the chambers respectively. A plurality of flange pins are installed at theperiphery of each chamber of the upper mold, and are evenly distributed around the axis of the corresponding chamber of the upper mold. Each positioning mechanism comprises a through hole formed in the body of the mold, a sliding sleeve is installed in the through hole, a sliding rod is arranged in the sliding sleeve, one end of the sliding rod is fixedly connected with a pressing block arranged in the through hole, the other end of the sliding rod is fixedly connected with a limiting block, the sliding rod is sleeved with a first spring, and the two ends of the first spring abut against the pressing block and the sliding sleeve respectively. A screw corresponding to a screw hole in the bottom of an inner core conductor of a wall bushing is arranged on each pressing block. With the rubberwall bushing processing mold, one inner core conductor can be accurately positioned, and rubber can be prevented from entering the screw hole of one inner core conductor.

Description

technical field [0001] The invention relates to a processing mold for a rubber wall-piercing bushing. Background technique [0002] Wall bushings are widely used in European-style cable branch boxes and ring network switch cabinets, generally porcelain wall bushings, epoxy resin wall bushings and composite wall bushings. Epoxy glass fiber winding, optimized mechanical layup design, high bending strength, excellent mechanical properties, especially suitable for heavy earthquake areas, and can withstand g≤1 severe earthquake conditions. The material characteristics of the product determine the area where the product can withstand large temperature differences: the highest temperature is +155°C, the lowest temperature is -200°C, and the wall bushing is used for power distribution devices and high-voltage electrical appliances in power stations and substations for wires to pass through Through the wiring partition, wall or electrical equipment shell, the conductive part is supp...

AI Technical Summary

Problems solved by technology

The material characteristics of the product determine the area where the product can withstand large temperature differences: the highest temperature is +155°C, the lowest temperature is -200°C, and the wall bushing is used for power distribution devices and high-voltage electrical appliances in power stations and substations for wires to pass through Pass through the wiring partition, wall or electrical equipment shell, support the conductive part to insulate it from the ground or the shell, but some wall bushings are filled with oil or gas medium, there is a risk of oil leakage and gas leakage, and the insulation margin is small

In order to solve this problem, our company applied for an invention patent named "CN 205610144 U" in 2016 and named "a wall-piercing bushing". The processing of the wall-piercing bushing is mold casting. During the process, some rubber will adhere to the upper and lower ends of the inner core conductor in the wall bushing, which will affect the conductive effect of the inner core conductor and even block the screw holes at both ends of the inner core conductor. Trouble; on the other hand, because the inner core conductor is prone to deflection during the casting of rubber, which affects product quality; on the other hand, some wall bushings need to install wiring copper sleeves in the flange, and the positioning of the wiring copper sleeves during casting Trouble, it will also happen that the position of the copper sleeve is not accurate and the rubber enters the screw hole.

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