Inlaying and positioning high-precision injection mold for needle cover of injection needle

Abstract

The invention discloses a high-precision injection mold for splicing and positioning an injection needle cover, and belongs to the technical field of molds. A high-precision injection mold for splicing and positioning an injection needle cover comprises a flow dividing column, a flow dividing hole is formed in a flow channel, the flow dividing hole penetrates through a male mold body, the flow dividing column is embedded in the flow dividing hole, the end, away from the flow channel, of the flow dividing column is of a step structure, and the flow dividing column and the male mold body are sealed and positioned through the step structure. The flow dividing column is composed of an inlaying step and a flow dividing body, the inlaying step is installed at one end of the flow dividing body, a flow dividing groove is formed in the end face of the other end of the flow dividing body, the flow dividing groove is of a T-shaped structure and matched with the flow channel, and an adjusting hole is formed in the middle of the flow dividing groove. The flow direction of materials is controlled by controlling the position relation between the flow dividing grooves in the flow dividing column and the flow channels, management of a mold cavity is achieved, the mold cavity is reasonably utilized, and the use defects of the mold in the aspects of mold testing and residue cleaning are effectively overcome.

Description

technical field [0001] The invention belongs to the technical field of molds, in particular to a high-precision injection mold for positioning the needle cover of an injection needle by inlaying. Background technique [0002] As a common medical tool, the syringe needs to be used to extract or inject liquid. In order to avoid accidental injury to patients and medical staff caused by the injection needle, the needle needs to be covered or hidden after the normal injection. The needle cover is used for this function. In the molds for producing needle covers, the existing molds are generally integral. As long as there is an abnormality in the molding surface of such molds, the entire female mold or male mold needs to be re-cut for processing. In molds with complex product structures, these The disadvantages are more prominent, so the inlaid mold came into being to spread the molding surface, avoid the overall scrapping of the mold, and reduce the waste of molding materials. ...

AI Technical Summary

Problems solved by technology

[0003] As far as the prior art is concerned, the mold of a small product such as a needle shield is usually equipped with multiple cavities, and multiple products can be produced by one injection molding. Before the mold is mass-produced, the mold accuracy is usually checked, that is, the female mold and the male mold are inspected. The matching degree of the mold, whether each molding surface can be smoothly connected, and in the inspection method, the method of reflecting the mold matching accuracy through the specific structure of a product is the most commonly used, which requires a complete injection molding experiment on the mold, and the existing mold The experiment needs to have complete production conditions before it can be carried out. It requires a large amount of material and takes a long time to melt the material, which reflects the harsh conditions and high cost of testing the accuracy of the existing mold. In addition, after the mold is put into production, when the last injection molding, The injection material in the barrel cannot be used for the last time of the mold, and there will be some residual materials more or less. These residual materials are unavoidable, not only waste resources, but also bring troubles to the cleaning of the hot runner of the equipment; in summary, the existing The cavity of the mold can only be fully put into use, and the mold lacks the management of the cavity, which leads to the disadvantages of using the mold in terms of mold testing and cleaning residues

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