Gas leak-proof vacuum port screw cylinder

Abstract

The invention provides a gas leak-proof vacuum port screw cylinder which comprises a vacuum port screw cylinder body, a vacuum port and a plurality of lead screws, wherein, corresponding through-holes are respectively formed on two opposite sides of the vacuum port screw cylinder body, and double screws can pass through the through-holes; the vacuum port is formed at the top of the vacuum port screw cylinder body, and a vacuum gland can be installed through the vacuum port; and the lead screws are arranged at the top of the vacuum port screw cylinder body and positioned around the vacuum port. No screw hole is formed on the gas leak-proof vacuum port screw cylinder, and the lead screws are arranged on the upper surface at the top of the vacuum port screw cylinder in a protruding manner, so that air leakage is caused because the screw hole is jammed by material and then a screw cannot be screwed in can be avoided consequentially, and the problem that the vacuum port is poorly sealed can be solved.

Description

technical field [0001] The invention relates to a screw barrel with a vacuum port, in particular to an air-leakage-proof vacuum port screw barrel. Background technique [0002] The modified plastics industry mainly uses twin-screw extruders. The twin-screw extruder is composed of key components such as the main motor, the transmission box, the main screw barrel, the machine head, and the main screw. The host screw barrel is composed of multiple independent screw barrels. There are several openings on the barrel of the main engine, including the feeding port and the vacuum port. The opening of the screw barrel at the feeding port is mainly to allow the mixed material to enter the screw barrel of the main engine for extrusion modification; the opening of the screw barrel at the vacuum port is mainly to allow the small molecular substances produced by the main engine during the extrusion process to be discharged smoothly from the main screw. cylinder to ensure the quality re...

AI Technical Summary

Problems solved by technology

But the screw hole 4' on the top 2' of the existing vacuum port screw barrel body 1' is easily blocked by the material in the screw barrel, causing the vacuum gland and the vacuum chamber to be in contact with the vacuum port screw barrel body 1 'Connected screw 6' cannot go in or the seal is not tight

Therefore, after the vacuum gland and the vacuum chamber are mounted on the existing vacuum port screw barrel body 1′, there are often problems of poor vacuum sealing and vacuum air leakage, which seriously affects the quality of the product.

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