Medical puncture needle mould is a precision injection mould. The product needs to be in contact with the human body. Therefore, the inspection requirements of the product are very strict. If it is difficult for people who have no experience in making such moulds, they will be scrapped. The following Yuhuan Shengjiu Mould Co., Ltd. introduces the mould making experience of medical puncture needles:
1. The main difficulty of the needle is that the dimensional accuracy of the core of the needle tip is not well controlled, even the equipment with high processing accuracy may not be able to process it in place; the size of the Luer connector at the bottom is designed according to a 6: 100 slope, and it must be strict Testing according to national standards, the actual accuracy may be 0.005-0.01mm, otherwise water leakage will occur, and the core processing scrap rate is very high.
2. First, select the steel material for the mould. The mould should be selected with high hardness. Steel materials with HRC above 35 ° are the most suitable. Generally, nak80 / S136 steel materials are used. The thermal deformation of the mould is small and the discharge is excellent.
3. Secondly, the control of processing accuracy is particularly important, because the puncture needle product is very small, the smallest hole size is only 1mm in diameter, and the concentricity of the core must be guaranteed. This is a test of the accuracy of the mould processing staff and processing equipment. of. When selecting processing equipment, we chose imported high-speed lathes, and tried to use equipment that has not been used for less than 5 years, because the actual processing accuracy of equipment that has been over a long time has deviated, which will directly affect the product moulding. The needle should be made of copper electrode, which is not easy to wear. After the high-speed carving is in place, the mould is matched with mirror electric sparks. (It is necessary to pay attention to the spark gap control during processing).
4 .: The choice of glue mouth. Generally, this product will use a multi-cavity design structure. The mould uses imported hot runner to latent glue. Because the glue mouth is on the inclined surface, it is easy to pull the glue mouth. At this time, the latent glue is EDM is particularly important, and the spark gap should be within 0.01 as much as possible.
5. The last is the assembly of the needle cap. The production of the needle cap is relatively simple compared to the needle. There is no high detection standard, as long as it can be matched with the needle.
Every link of the design, processing and assembly of medical moulds is very important. We must grasp each node well. There are also many testing procedures for medical products. It is not necessary that two products can be well assembled. They must pass various quality inspections.
With the increasing attention to health, the market demand for syringe moulds and safety needle moulds is growing. Yuhuan Shengjiu Mould Co., Ltd. makes these uses of medical mould more with its superb technology. The main production and supply: syringe moulds, safety needle moulds, oxygen mask moulds, needle-free injection nozzles, dilation moulds and other medical moulds. We have strict quality control throughout the production process of our products, making our products a safe choice for everyone. Welcome to buy: https://www.medicalmould.net/
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原文：https://www.cnblogs.com/kristamedicalmould/p/12334872.html