Spliced wear-resistant heat-insulating valve needle hot nozzle system

Abstract

The invention discloses a spliced wear-resistant heat-insulating valve needle hot nozzle system. The spliced wear-resistant heat-insulating valve needle hot nozzle system comprises a hot nozzle main body, a heating sleeve, a hot nozzle core and a valve needle assembly, wherein the heating sleeve is arranged on the outer side of the circumference of the hot nozzle main body, the hot nozzle core isarranged on the inner side of one end of the hot nozzle main body, the valve needle assembly is arranged in the hot nozzle core, the end, far away from the hot nozzle core, of the valve needle assembly penetrates through the hot nozzle main body and extends out of the hot nozzle main body, the valve needle assembly comprises a valve rod arranged inside the hot nozzle main body, one end of the valve rod is connected with a valve needle head through a fixing pin, and a heat-insulation abrasion-resistant layer is arranged on the surface of the valve needle head. The spliced wear-resistant heat-insulating valve needle hot nozzle system has the beneficial effects that the valve needle is divided into two parts of a valve needle rod and the valve needle head, the head part adopts alloy steel materials with lower heat conduction coefficients, and the valve needle head is subjected to the plating heat-insulating wear-resistant coating treatment, so that the wear-resistant and heat-insulating effects are achieved, and the problems that the head part is easy to wear, product burrs, glue port scald and hot marks are caused by over-high temperature are solved.

Description

technical field [0001] The invention relates to the technical field of hot runners, in particular to a spliced ​​wear-resistant and heat-insulated valve needle hot nozzle system. Background technique [0002] A hot runner is a heating component system used in injection molds to inject molten plastic particles into the cavity of the mold. The hot runner mold is a new structure that heats the runners and runners of the traditional mold or the three-plate mold, and does not need to take out the runners and runners during each forming. The hot nozzle system is an important part of the hot runner. The needle valve hot nozzle currently used in the hot runner has the following disadvantages during use: 1. The valve needle head is not protected, and the valve needle head is not wear-resistant and easy to wear , the rubber port is prone to produce defective products such as burrs; 2. The valve needle head is directly in contact with the high-temperature molten plastic inside the cor...

AI Technical Summary

Problems solved by technology

The hot nozzle system is an important part of the hot runner. The needle valve hot nozzle currently used in the hot runner has the following disadvantages during use: 1. The valve needle head is not protected, and the valve needle head is not wear-resistant and easy to wear , the rubber port is prone to produce defective products such as burrs; 2. The valve needle head is directly in contact with the high-temperature molten plastic inside the core and the flow channel, resulting in excessive temperature of the valve needle head, which is easy to burn the product rubber port, and the rubber port produces hot stamping and other defects. product

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