Biological sample preservation tube with identification code and method for manufacturing the same
The present invention relates to a biological sample preservation tube with an identification code, wherein an information element which records the sample information is fused integrally with the bottom wall and/or side walls during molding the preservation tube, the preservation tube is suitable for the preservation of a biological sample at low temperature and can ensure the effectiveness and stability at low temperature; and at the same time also relates to a method for manufacturing the biological sample preservation tube, wherein the preservation tube is molded by a one-step process, without an additional secondary processes for manufacturing the identification code, the method improves the production efficiency, reduces the production cost, employs multi-point symmetrical feeding, and has good quality and stability of the product, so that the method is of great significance as it opens up a new idea for developing and producing the similar product in the industry, especially the small-sized preservation tube with an identification code.
1. A method for making a biological sample preservation tube with an identification code, comprising:
manufacturing an information element, including:
printing the identification code on a core layer;
overlaying a heat sealing layer on the identification code of the core layer; and
forming the information element by integrating the core layer and the heat sealing layer;
cutting the information element, including:
cutting the information element into a size not exceeding that of a position to be fused, and each cut information element is removed off static electricity to avoid attaching to each other; and
placing the cut information element on a same support frame as a mold, for being taken by a robotic hand;
picking and placing the information element, including:
placing the cut information element on a predetermined position in the mold by the robotic hand, with a side of the cut information element having the identification code facing away from an inner core attached to an outer wall of a mold cavity;
applying static electricity on the cut information element such that the cut information element is attached onto the mold under the effect of the electrostatic field for temporary fixation; and
performing mold closing and injection molding to form the biological sample preservation tube, including:
injecting molten plastic feedstock into the mold via at least two symmetric feed channels from both sides of the mold, each feed channel being reflexed at a point close to a plurality of feed inlets pointing to a center position of a bottom side of the mold, the at least two symmetric feed channels introducing the molten plastic feedstock into the mold.
2. The method according to claim 1 , wherein the feed inlets are an even number, and are symmetrically distributed in the mold.
3. The method according to claim 1 , wherein the core layer is made into a required thickness by means of extrusion or stretching, and the core layer and the heat sealing layer are integrally molded by means of coating or co-extrusion.
4. The method according to claim 1 , wherein placing the cut information element on the predetermined position in the mold by the robotic hand comprises:
placing a first cut information element on both a bottom position and placing a second cut information element on a side wall position in the mold by the robotic hand.
5. The method according to claim 1 , wherein performing mold closing and injection molding to form the biological sample preservation tube comprises:
injecting molten plastic feedstock into the mold to surround another side of the cut information element without the identification code and a side surface of the information element.