Clamping-type disposable blood taking needle and forming technology

Abstract

The invention provides a clamping-type disposable blood taking needle and a production technology. The blood taking needle comprises a needle handle, a steel needle and a needle cap, wherein the needle handle has a double-layer sheet-shaped structure composed through firm connection of a needle handle baseplate layer and a needle handle covering layer; a needle body of the steel needle is firmly clamped between the needle handle baseplate layer and the needle handle covering layer; and a needle tip of the steel needle is inserted in the needle cap in a sealed manner. The production technology comprises the steps that (S1) a baseplate layer plastic plate and the steel needle are prefabricated, and a covering sheet layer plastic plate is prefabricated in advance when a covering layer of the needle handle and a covering layer of the needle cap adopt a covering sheet layer structure; (S2) the steel needles are placed in steel needle positioning grooves in the baseplate layer plastic plate one after another; (S3) the upper covering sheet layer plastic plate is fixed on the baseplate layer plastic plate or a laminating layer is formed through coating; and (S4) the formed baseplate layer plastic plate and the covering sheet layer plastic plate or a combined plate of the laminating layer are divided according to set shapes and sizes of the blood taking needles, and finally, the multiple blood taking needles can be fabricated. The blood taking needle has the advantages that the material cost is reduced. The forming technology has the advantages that the die cost is reduced; electric energy consumption is reduced; and the manufacture cost for the blood taking needle is reduced.

Description

technical field [0001] The invention relates to a peripheral blood collection device in the field of clinical medicine, in particular to a clip-type disposable blood collection needle and a molding process. Background technique [0002] The blood collection needle is a disposable peripheral blood collection consumable, which can be directly used for peripheral blood collection, and can also be assembled in a blood collection pen to perform peripheral blood collection by firing the blood collection pen. The main components of the blood collection needle include the needle handle, the steel needle and the needle cap. Usually, the needle cap and the needle handle are integrally connected by injection molding. The needle body of the steel needle is wrapped in the needle handle, and the needle tip of the steel needle is sealed in the needle cap. The connecting part of the handle and the needle cap forms a weak point, so that when the blood is taken, the needle cap is twisted, and...

AI Technical Summary

Problems solved by technology

[0003] Existing lancets are injection molded through moulds. Specifically, firstly, a mold corresponding to the shape of the set lancets is made, a bracket for placing steel needles is designed on the mold, and the support and the hole for placing the bracket are manufactured, researched and matched. The size control is very strict, which takes a lot of time and energy. A little carelessness will produce burrs on the surface of the injection molded product; then use the injection molding machine to melt the plastic particles into a liquid at high temperature. The molten plastic liquid is injected into the mold cavity and cooled for molding

The above-mentioned method of injection molding through molds has many defects, such as high mold manufacturing costs, frequent maintenance, limited service life, a large amount of electric energy consumed in the injection molding process, and a large footprint of the injection molding machine. In addition, due to the injection molding method, the needle handle and The wall thickness of the needle cap should not be too small. The above-mentioned factors are the main factors affecting the cost of blood collection needles, which limit the cost reduction of blood collection needles

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