Composite long rod insulator injection molding machine

Abstract

The invention discloses a composite long rod insulator injection molding machine and includes a hydraulic molding machine, a hydraulic system, more than two vertical or horizontal rubber injection molding machines arranged on one side of the hydraulic molding machine, an upper die and a lower die which can be matched into an integral mold, a plurality of mandrel locating devices, a mandrel tension apparatus and a mold of an injection nozzle, a temperature controlling apparatus, an automatic control system and a device which controls the synchronized movement of piston rods. The hydraulic system is provided with a plurality of oil cylinders, the lower ends of the piston rods are fixed on the same slide block, the mandrel locating devices are uniformly distributed in the cavities of the upper die and the lower die, and includes locating mandrels with racks, gears meshed with the racks of the locating mandrels and regulating crank wrenches fixed with the gear shafts. The extrusion of themandrels has uniform press, the quality and the service life of the composite long rod insulator are greatly improved, the defective index in production process is lowered, the tailings are reduced, the raw material is saved, the work efficiency is greatly improved, the production cost is reduced and the cleaning is easy.

Description

1. Technical field: [0001] The invention relates to a production equipment of high-voltage composite long-rod insulators, in particular to an injection molding machine of high-voltage composite long-rod insulators. 2. Background technology: [0002] Because the long mandrel is not easy to locate in the mold, it is easy to deform during the process of high temperature and high pressure injection of silicone colloid. Therefore, the composite insulator injection molding machine currently used at home and abroad has only one injection machine, and the mold is very short. The length is very short, and it is impossible to complete the one-time molding of the long rod insulator, and only segmental injection molding can be performed. Segmented injection molding, due to the high injection pressure, it is easy to squeeze and misplace the vulcanized silicone in the front, causing a small part of the bonded surface between the vulcanized rubber and the mandrel to be debonded, or a ring ...

AI Technical Summary

Problems solved by technology

[0002] Since the long mandrel is not easy to locate in the mold, it is easy to deform during the high-temperature and high-pressure injection of silicone colloid. Therefore, the composite insulator injection molding machine currently used at home and abroad has only one injection machine, and the mold is very short. The length is very short, and it is impossible to complete the one-time molding of long rod insulators, and only segmental injection molding can be performed

Segmented injection molding, due to the high injection pressure, it is easy to squeeze the previously vulcanized silica gel out of position, resulting in a small part of the bonded surface between the previously vulcanized rubber and the mandrel to be debonded, or a ring at each joint. Seams, dislocations, or umbrella deformations. Partial discharges will occur at high-voltage operation at the position of the bone-off and ring seams. Long-term operation will cause the insulators to be brittle. It will also make the insulator brittle, and the above situations will reduce the service life of the insulator

The segmented injection process, due to the extrusion pressure, reduces the quality and quality of the product, and the product life is short, causing large-scale power outages and causing huge losses to the country and the people

Segmented injection is labor-intensive and time-consuming, the production efficiency is low, the leftovers are increased, raw materials are wasted, and the production cost of the product is increased.

In addition, the rubber channel in the injection molding machine adopts a vertical rubber channel, and a rubber channel plate is connected to the bottom of the vertical rubber channel. The rubber channel on the rubber channel plate matches the position of the umbrella skirt cavity on the mold. The requirements are high, the production is complicated, and the cost is high; and the rubber channel is long, the amount of silica gel trapped in the rubber channel is large, it is not easy to clean, and a large amount of silica gel is wasted

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