Production process for composite insulator solid core rob

A technology for composite insulators and mandrels, which is applied in the direction of insulators, suspension/strain insulators, household components, etc., and can solve the problems of low success rate, sticking to the mold, and the inability to realize the preparation of epoxy glass fiber mandrels, etc.

Inactive Publication Date: 2009-07-15
陕西泰普瑞电工技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Limited by the existing process, the continuous pultrusion process cannot realize the preparation of epoxy glass fiber core rods with a diameter greater than 180mm or the success rate is very low
The reasons are as follows. During the curing and molding process of the large-diameter mandrel, due to the large diameter of the mandrel, the heat on the mold is transmitted to the inside of the mandrel at a slower speed; if the formed glass fiber mandrel slows down the heating speed to If the inside of the mandrel is completely solidified, the mandrel will stick to the mold, and the traction device will not move when the mold is released. If the pulling force is increased, the mold will be damaged; if the existing heating conditions are used, the surface of the mandrel will Cured, but the inside of the mandrel may still be in a semi-cured state. At this time, the mandrel is prone to cracking due to internal stress during pultrusion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] A method for preparing a composite insulator solid mandrel. First, a set amount of epoxy glass fiber is exported to a dipping tank for dipping, and the dipped epoxy glass fiber enters a molding machine. Put it in the hot mold; the hot plate of the molding machine further heats the mold. When heating the mold, apply the same pressure of 12 to 30Mpa on the top and bottom of the mold, and the mold heating temperature gradually increases, heating at 80°C to 120°C for 0.5 to 1 Hours, heating at 120°C-150°C for 1-1.5 hours, heating at 150°C-180°C for 1-3 hours, and stopping heating after maintaining 180°C for 1-3 hours; slowly cooling the mold, maintaining 180°C-150°C for 0.5-1.5 hours, Maintain 0.5-1.5 hours at 150°C-120°C, and maintain a pressure of 12-30Mpa on the mold when cooling down, and the mandrel is cured once;

[0021] After the mandrel is heated and cured, the molding press is turned on, the mold is separated, the formed epoxy glass fiber is drawn out of the mold,...

Embodiment 1

[0028] The preparation method of the epoxy glass fiber composite insulator solid core rod with a diameter of 180mm:

[0029] Raw material: epoxy glass fiber;

[0030] Equipment: pultrusion traction machine, molding machine, mold, microwave oven, yarn guide frame;

[0031] Carry out according to the following process: First, pull one end of 8300 4800Tex fibers through a pultrusion machine, and enter the dipping unit for dipping. The glue used in this embodiment is epoxy glue EA-70, which is different from the commonly used E51 epoxy resin , which is characterized by low viscosity and high activity. Secondly, the pultrusion tractor pulls the epoxy glass fiber after dipping, and puts it in the mold of the molding machine. . Then, the pultrusion tractor stops running, the molding machine starts to work, the hot plate of the molding machine further heats the mould, and the molding machine slowly closes until it is completely closed; The hydraulic output terminal is connected, a...

Embodiment 2

[0034] The preparation method of the epoxy glass fiber composite insulator solid core rod with a diameter of 180mm:

[0035] Raw material: epoxy glass fiber;

[0036] Equipment: pultrusion traction machine, molding machine, mold, microwave oven, yarn guide frame;

[0037] Carry out according to the following process: First, pull one end of 8300 4800Tex fibers through a pultrusion machine, and enter the dipping unit for dipping. The glue used in this embodiment is epoxy glue EA-70, which is different from the commonly used E51 epoxy resin , which is characterized by low viscosity and high activity. Secondly, the pultrusion tractor pulls the epoxy glass fiber after dipping, and puts it in the mold of the molding machine. . Then, the pultrusion tractor stops running, the molding machine starts to work, the hot plate of the molding machine further heats the mold, and the molding machine slowly closes until it is completely closed; The hydraulic output terminal is connected, an...

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Abstract

The invention discloses a method for preparation of composite insulator solid mandril, including: leading-out setting quantity of epoxy glass fiber to a dipping tank for dipping, the epoxy glass fiber after dipping entering into a mould pressing machine, arranging in a preheat die coated with release agent; the mould pressing machine further heating the die, simultaneously applying the identical pressure to the top and bottom of the die, after heating the die at 80 DEG C - 180 DEG C for 4 - 8 hours, maintaining pressure at 180 DEG C - 120 DEG C for 1 to 3 hours to complete the mandril by one time molding; after the one time molding of the mandril, stating the mould pressing machine, separating the dies, drawing the molding epoxy glass fiber from the die, and performing second curing by microwave heating. To ensure complete curing in the internal of the mandrel, intermittent pultrusion technology is combined with the flat-plate heating molding technology, to realize the production of large-diameter epoxy glass fiber composite insulator mandril.

Description

technical field [0001] The invention belongs to the technical field of composite insulators, and relates to a preparation method of a composite insulator solid mandrel, in particular to a preparation method of a large-diameter epoxy glass fiber composite insulator solid mandrel with a diameter of more than 180 mm. Background technique [0002] Composite insulators are composed of mandrel (core body), fittings, and silicone rubber sheaths. The mandrel plays the role of internal insulation and transmits mechanical loads, the silicone rubber sheath plays the role of outer insulation, and the fittings play the role of connecting both ends. Among them, the role of mandrel is the most important and critical. The mandrel used as internal insulation is divided into solid mandrel and hollow mandrel. The product produced with hollow mandrel is called hollow composite insulator, and the product produced with solid mandrel is called solid composite insulator. Solid composite insulators...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B19/00H01B17/04B29C70/40B29C70/34B29C70/54B29C71/04B29K63/00B29K309/08B29L31/00
Inventor 吴亚明
Owner 陕西泰普瑞电工技术有限公司
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