Puncture core rod manufacturing method, puncture core rod and puncture outfit

Abstract

The invention discloses a puncture core rod manufacturing method, a puncture core rod and a puncture outfit. The puncture core rod manufacturing method comprises the following steps that S1, a rod body and a molding rod are fed into a cavity of an injection mold; S2, the injection mold is closed, the rod body and the molding rod are positioned, and the clearance between the molding rod and the inner wall of the rod body is maintained to be 0.01 mm-0.02 mm; and S3, injection molding materials are injected into the cavity, injection molding of the sharp end of a puncture core is conducted, an injection molding opening is located in one side of the rod body and injection molding materials are formed after pressure maintaining and cooling, and the formed sharp end of the puncture core is demolded. According to the puncture core rod manufacturing method, a mode of laterally injecting the injection molding materials is adopted, and the injection molding quality of the sharp end of the puncture core is effectively ensured; in addition, by controlling the distance between the molding rod and the inner wall of the rod body of the puncture core rod, not only can the rod body and the molding rod be effectively separated, but also the injection molding materials can be prevented from entering a space between the rod body and the molding rod.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a method for manufacturing a puncture mandrel, a corresponding puncture mandrel and a trocar. Background technique [0002] In abdominal examination, abdominal surgery and other minimally invasive or surgical operations, trocar is an indispensable surgical instrument. The puncture device can establish an access channel in the abdominal wall of the human body, so that the laparoscope or other surgical instruments (such as endoscopes, scissors, staplers, guide wires, catheters, filters, stents, etc.) Channels to control the pneumoperitoneum required for surgery for examination or surgical manipulation. [0003] At the beginning of a minimally invasive laparoscopic medical operation, the doctor generally makes a small incision in the patient's abdomen, and then aligns the apex of the puncture end with the small incision and moves it downward while reciprocating left and right. Aft...

AI Technical Summary

Problems solved by technology

However, during the injection molding of the existing puncture core rod, the injection port is usually arranged at the end position of the puncture core tip close to the molding. When demolding like this, the redundant injection compound will form a protrusion at the end of the puncture core tip, and then Affects the injection molding quality of the piercing core tip

In addition, when the existing piercing mandrel is injected, there is also the problem that the shaft of the piercing mandrel is not easy to separate from the molding rod

Images