Sheath core and processing method thereof

Abstract

The invention discloses a sleeve protecting core. The sleeve protecting core comprises a core body, wherein the core body is successively and coaxially provided with a core first part, a core second part, a core third part, a core forth part, a core fifth part and a core sixth part from left to right, wherein the periphery of the core fifth part is provided with a first groove in an annular manner, and four second grooves are uniformly distributed in the periphery of the core fifth part; the length directions of the second grooves are parallel to an axis of the core body, the second grooves are formed in a way that one end, which is close to the core sixth part, of the core fifth part extends towards the core forth part and can not run through the core fifth part. The sleeve protecting core has high dimensional precision and can be used for many times. The invention also discloses a processing method of the sleeve protecting core, the processing method can enable the sleeve protecting core in a stamping mould to be accurate in precision, the productive process is qualified once, and the product rejection rate is low.

Description

technical field [0001] The invention relates to a sheath core, in particular to a sheath core used in a plastic mold for processing a needle protective cover of a syringe, and a processing method for the sheath core. Background technique [0002] A syringe is a common medical device. Before using the syringe, it is necessary to use the needle protection cover to protect the needle on the syringe, so as to prevent the needle of the syringe from being polluted or hurting people. During the manufacturing process of the syringe needle protection cap, its manufacturing accuracy needs to be strictly guaranteed, so that the needle protection cap can be set on the needle of the syringe. In order to ensure the manufacturing accuracy of the needle protection cover, the dimensional accuracy of the plastic mold and the supporting sheath core must be ensured first. [0003] At present, the method of processing sheath cores generally adopts traditional manual turning, milling and grindi...

AI Technical Summary

Problems solved by technology

[0003] At present, the method of processing sheath cores generally adopts traditional manual turning, milling and grinding. The processed sheath cores cannot meet the accuracy requirements of each size, so that the sheath cores cannot be assembled or used, resulting in sheath type. The core needs to be processed twice or scrapped directly, which increases the cost and prolongs the production cycle

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