Electric knife bit for endoscopic submucosal dissection, and preparation method thereof

Abstract

The invention discloses an electric knife bit for endoscopic submucosal dissection, and a preparation method thereof. The electric knife bit is composed of a core layer and a shell layer. The core layer is wrapped with the shell layer. The preparation method of the electric knife bit comprises the steps that 316L stainless steel and ZrO2 ceramic are selected as a shell layer material and a core layer material correspondingly; shell layer material feed and core layer material feed are obtained through mixing and pelletizing; then the shell layer material feed and the core layer material feed are sequentially injected into a mold cavity through a co-injection forming technology to obtain a product green body; and then a binder in the green body is removed through solvent degreasing and thermal degreasing technologies, and finally a structural and functional integration electric knife bit product is obtained through co-sintering densification. According to the electric knife bit, a powderco-injection forming technology is adopted, the processing efficiency is high, the production cost is low, a composite material with the excellent shell layer and core layer binding property and thestable quality is prepared, the problems such as poor product performance, low efficiency and high cost in existing technologies are solved, and the preparation method is suitable for preparing the electric knife bit for the endoscopic submucosal dissection.

Description

technical field [0001] The invention relates to an endoscopic mucosal dissection (ESD) electric knife head and a preparation method thereof, in particular to an endoscopic mucosal dissection (ESD) electric knife head and powder co-injection molding technology to prepare endoscopic mucosal dissection electric knife The method of the knife head. Background technique [0002] With the development of society, people pay more and more attention to health. The discovery and removal of early digestive tract cancer and precancerous lesions have always been the focus of endoscopists. Endoscopic mucosal dissection (ESD) can be used to completely resect some early tumors with electrocautery, which is a commonly used surgical method to achieve radical cure. [0003] The electric knife head is one of the key parts, which generally consists of a conductive shell layer for cutting and an insulating core layer for connecting the knife handle. The electric knife head has the following cha...

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Problems solved by technology

At present, there are many processes for preparing such core-shell structural parts, such as thermal spraying, surface machining, chemical vapor deposition (CVD), physical vapor deposition (PVD), laser cladding, etc., but these processes are different to varying degrees. There are various disadvantages: For example, the insufficient bonding strength of the product interface in spraying or laser cladding processes affects the service life, and the equipment investment is large, the production cycle is long and the cost is high; surface machining and chemical treatment are limited by the shape of the product, and the cost is also high

However, there is no report on the use of powder co-injection molding in the existing technology for preparing electric knife heads.

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