Polymeric housed explosion-resistant glue feeding-resistant forming die

Abstract

The invention discloses a polymeric housed explosion-resistant glue feeding-resistant forming die. The forming die comprises a die frame, a die cavity, a channel, a glue injection aperture, an insulating cylinder and a lining, the die cavity, the channel and the glue injection aperture are communicated, the lining is placed in the insulating cylinder and is cooperated with the insulating cylinder for usage, the polymeric housed explosion-resistant glue feeding-resistant forming die also comprises a protective sleeve, a telescoping apparatus, a left push rod and a right push rod, the protective sleeve is arranged at left end of the lining, the telescoping apparatus is arranged at right end of the lining, the insulating cylinder is arranged between the protective sleeve and the telescoping apparatus, the left push rod is arranged at the die frame of the left end of the die cavity, and the right push rod is arranged at the die frame of the right end of the die cavity. According to the invention, the polymeric housed explosion-resistant glue feeding-resistant forming die has the advantages of simple structure and convenient operation, generation of explosion phenomenon at end part of the insulating cylinder can be effectively avoided, qualified rate of the product is increased, penetration of the rubber compound in the insulating cylinder can be effectively avoided, optimum application amount of the silicone rubber can be fined according to the glue-spilling amount in a glue-spilling groove, so that the product qualified rate can be increased, and material amount for production can be saved.

Description

technical field [0001] The invention relates to a molding die, in particular to a compound casing anti-explosion cracking and anti-glue forming mold, which belongs to the technical field of high-voltage composite casing metal oxide arresters. Background technique [0002] The metal oxide surge arrester with composite jacket of high voltage level is mainly composed of a core body composed of a composite jacket and a resistance sheet, and other related components. The injection molding of the composite jacket is an important process in the production process of the arrester. [0003] Conventional composite jacket forming mold adopts fixed type, that is, the two ends of the mold cavity adopt a slot-type structure, and the insulating cylinder is placed in the fixed mold slot after being matched with a bushing, the mold is closed and injected with silicone rubber, and the silicone rubber flows through the injection hole , injected into the cavity space of the umbrella cover thro...

AI Technical Summary

Problems solved by technology

Even though thermal expansion elongation of the insulating barrel has been taken into account, end blowouts still occur

In addition, due to the reserved expansion space, the rubber material will enter the gap formed by the insulating cylinder, the bushing, and the end of the mold cavity along the gap under the huge injection pressure because the insulating cylinder has not yet expanded during injection, and enters Because the rubber material cannot be in full contact with the mold, the temperature cannot meet the vulcanization requirements, it will bond the insulating cylinder and the bushing together, and the bushing is difficult to take out from the insulating cylinder after the molding is completed

At the same time, it is difficult to clean the silicone rubber that has entered the surface of the insulating tube thread and bushing, which seriously affects the production efficiency and product qualification rate

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