Degradable tissue clip injection mold and processing process

Abstract

The invention relates to a degradable tissue clip injection mold and a processing process. The injection mold comprises an upper mold and a lower mold, a hot runner injection molding system arranged on upper mold and a demolding mechanism, wherein a plurality of molding cavities are arranged between the upper mold and the lower mold; and the hot runner injection molding system comprises a runner plate, a plurality of hot nozzles connected with the runner plate and matched with the molding cavities, a push plate slidably mounted on the upper mold, valve needles fixed to the push plate and usedfor opening and closing the hot nozzles, and a driving cylinder fixed to the upper mold and connected with the push plate, and the plastic containing volume of the hot runner injection molding systemis smaller than the difference between the injection amount of an injection molding raw material in a molding machine and the plastic containing volume of the molding machine in the degradation time.According to the injection mold and the process, the hot runner injection molding system is adopted to form a product without residual material heads, subsequent reprocessing is not needed, the processing process is simpler, the injection molding raw materials can be kept in an undegraded state after injection molding, and the continuous operation of the injection molding process is guaranteed.

Description

technical field [0001] The invention relates to the technical field of tissue clip processing, in particular to a degradable tissue clip injection mold and a processing technology. Background technique [0002] Tissue clips are used to clamp and fix the tissues in the human body after the operation is completed to facilitate postoperative wound healing. Since the tissue clips need to stay in the human body, they are usually made of degradable materials, and the weight and size of the tissue clips is also smaller, such as figure 1 As shown, the weight of the tissue jacket to be produced is 0.07g, and the degradation time of the degradable material of the tissue clip is generally less than 30 minutes at high temperature. Due to the limitation of the size of the current molding machine, cold runner injection molds are currently used for processing. However, after the injection molding is completed, the injection plastic head will be left on the product surface, and subsequent ...

AI Technical Summary

Problems solved by technology

[0002] Tissue clips are used to clamp and fix the tissues in the human body after the operation is completed to facilitate postoperative wound healing. Since the tissue clips need to stay in the human body, they are usually made of degradable materials, and the weight and size of the tissue clips is also smaller, such as figure 1 As shown, the weight of the tissue jacket to be produced is 0.07g, and the degradation time of the degradable material of the tissue clip is generally less than 30 minutes at high temperature. Due to the limitation of the size of the current molding machine, cold runner injection molds are currently used for processing. However, after the injection molding is completed, the injection plastic head will be left on the surface of the product, and subsequent reprocessing is required to remove the material head, and the processing process is relatively cumbersome.

Images