Integrally-formed indwelling needle catheter and manufacturing process thereof

Abstract

The invention discloses an integrally-formed indwelling needle catheter and a manufacturing process thereof. The catheter is connected with a catheter seat, and the catheter and the catheter seat areintegrally formed by adopting a single plastic or double-material injection molding process. The integrally-formed manufacturing process comprises the following steps that S1, the plastic raw materials are preheated in an oven at the temperature of 80 DEG C to 150 DEG C for 2-8 h; S2, the plastic raw materials preheated in the first step are subjected to injection molding in an injection molding machine, the forming temperature ranges from 150 DEG C to 350 DEG C, and the injection pressure ranges from 50 N to 800 N; S3, injection molding of the catheter is conducted by means of the methods inthe first step and the second step; S4, injection molding of the catheter seat is conducted by means of the methods in the first step and the second step; and S5, the catheter is connected with the catheter seat. The injection molding process is easy to operate, the product quality is stable, the raw materials are saved, the processing speed is high, and large-quantity repeated machining is facilitated.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a manufacturing process of a catheter in an integrally formed indwelling needle. Background technique [0002] Indwelling needles, also known as venous trocars, can reduce the patient's vascular damage and fear of injections caused by repeated venipuncture, reduce the anxiety of parents, and reduce the operation intensity and workload of clinical nurses. The indwelling needle is easy to operate, suitable for puncture in any part, and widely used in clinical practice. [0003] At present, the indwelling needles used for medical injection in the market include catheters, rivets and catheter hubs indwelling in blood vessels. The catheter is made of plastic. The rivet is made of stainless steel, which is made by inflating the mold with a press machine; the catheter seat is made of plastic, which is injection-molded on the mold with an injection molding machine; the catheter,...

AI Technical Summary

Problems solved by technology

[0005] In the existing catheter production process, there are complex processes, inability to automate production, high energy consumption, serious water pollution due to the need for a large amount of water cleaning, and a long production cycle. Due to the difficulty of operation, the pass rate of the product is only about 78%. After the wide hole at the A end of the catheter, the tube wall itself has become thinner, and the wide hole at the A end of the catheter needs to be combined with the main body of the catheter holder of the indwelling needle with rivets. , it is easy to puncture the thinned tube wall during the production process, and it is easy to cause blood or liquid leakage and air into the blood vessel during subsequent use; the side hole at the B-end of the catheter is prone to flash during the opening process , the fragments on the catheter will enter the human body under the washing of blood or liquid medicine. In addition, when opening the side hole, it is easy to flush the tube wall out of the crack, resulting in a sharp cut to the blood vessel