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YIXUN mold
8480419090
ABS Plastic
Mechanical Properties: ABS has good impact resistance, strength, and rigidity, which can ensure that the components can maintain their shape and function under various conditions in medical devices. For example, it is suitable for manufacturing parts such as medical device housings that need to withstand certain impacts.
Thermal Stability: It has relatively good thermal stability, which can withstand certain temperature changes during the sterilization process of medical devices, such as autoclaving at a certain temperature.
Processability: ABS is easy to process by injection molding, which is conducive to mass - production of high - precision components.
PVC Plastic
Flexibility and Softness: PVC can be formulated into soft or rigid materials. Soft PVC has excellent flexibility, which is very suitable for manufacturing components such as medical tubing, such as infusion tubes and suction tubes, which need to be bent and twisted.
Chemical Stability: It has good chemical resistance and can resist the erosion of many chemical substances in the medical environment, such as disinfectants.
Cost - effectiveness: PVC is relatively inexpensive, which is conducive to reducing the production cost of medical devices, especially for disposable medical products.
Injection Molding
Equipment Precision: High - precision injection molding machines are required, such as those equipped with closed - loop servo control systems. These machines can control the injection pressure fluctuation within ±1% and the pressure - holding repeat accuracy up to ±0.5MPa, ensuring that the weight difference of products is less than 0.1%.
Mold Design and Manufacturing: The mold manufacturing tolerance needs to be strictly controlled within ±0.005mm, and the surface is mirror - polished (Ra≤0.2μm). For example, in the production of PVC - based respiratory mask molds, the mold cavity surface needs to be electrolytically polished to reduce the risk of microbial adhesion.
Process Parameter Optimization: According to the material properties and product requirements, parameters such as barrel temperature, mold temperature, injection pressure, and injection speed need to be precisely optimized. For ABS, the barrel temperature is usually set according to its melting point range to ensure good fluidity and avoid thermal degradation.
Extrusion Molding
Screw and Barrel Design: For medical - grade plastic extrusion, the screw and barrel need to be specially designed. The long - diameter ratio of the screw is generally between 25 and 30, and the compression ratio is 2 - 4, which can effectively improve the mixing and plasticizing quality of materials. This is very important for the production of medical PVC pipes.
Temperature and Pressure Control: The temperature and pressure during the extrusion process need to be precisely controlled. For example, when producing medical - grade PVC pipes, the barrel temperature is generally 160 - 190℃, and the die head temperature is 170 - 180℃. Pressure sensors and temperature sensors are installed to monitor and feedback for adjustment in real - time.
Medical Device Housings: ABS is often used to make the housings of various medical devices, such as diagnostic equipment and monitoring instruments. These housings need to have high - precision dimensions to ensure the installation and operation of internal components, as well as good appearance quality.
Disposable Medical Supplies: PVC is widely used in the production of disposable medical supplies. For example, infusion sets, syringes, and respiratory masks. High - precision molding ensures the accuracy of product dimensions, such as the volume accuracy of syringes and the airtightness of respiratory masks.
Medical Tubing: Both ABS and PVC can be used to make medical tubing. High - precision extrusion molding can ensure the uniformity of the wall thickness of the tubing, the smoothness of the inner and outer surfaces, and the accuracy of the diameter, which is crucial for the flow of fluids and gases in medical tubing.
ABS Plastic
Mechanical Properties: ABS has good impact resistance, strength, and rigidity, which can ensure that the components can maintain their shape and function under various conditions in medical devices. For example, it is suitable for manufacturing parts such as medical device housings that need to withstand certain impacts.
Thermal Stability: It has relatively good thermal stability, which can withstand certain temperature changes during the sterilization process of medical devices, such as autoclaving at a certain temperature.
Processability: ABS is easy to process by injection molding, which is conducive to mass - production of high - precision components.
PVC Plastic
Flexibility and Softness: PVC can be formulated into soft or rigid materials. Soft PVC has excellent flexibility, which is very suitable for manufacturing components such as medical tubing, such as infusion tubes and suction tubes, which need to be bent and twisted.
Chemical Stability: It has good chemical resistance and can resist the erosion of many chemical substances in the medical environment, such as disinfectants.
Cost - effectiveness: PVC is relatively inexpensive, which is conducive to reducing the production cost of medical devices, especially for disposable medical products.
Injection Molding
Equipment Precision: High - precision injection molding machines are required, such as those equipped with closed - loop servo control systems. These machines can control the injection pressure fluctuation within ±1% and the pressure - holding repeat accuracy up to ±0.5MPa, ensuring that the weight difference of products is less than 0.1%.
Mold Design and Manufacturing: The mold manufacturing tolerance needs to be strictly controlled within ±0.005mm, and the surface is mirror - polished (Ra≤0.2μm). For example, in the production of PVC - based respiratory mask molds, the mold cavity surface needs to be electrolytically polished to reduce the risk of microbial adhesion.
Process Parameter Optimization: According to the material properties and product requirements, parameters such as barrel temperature, mold temperature, injection pressure, and injection speed need to be precisely optimized. For ABS, the barrel temperature is usually set according to its melting point range to ensure good fluidity and avoid thermal degradation.
Extrusion Molding
Screw and Barrel Design: For medical - grade plastic extrusion, the screw and barrel need to be specially designed. The long - diameter ratio of the screw is generally between 25 and 30, and the compression ratio is 2 - 4, which can effectively improve the mixing and plasticizing quality of materials. This is very important for the production of medical PVC pipes.
Temperature and Pressure Control: The temperature and pressure during the extrusion process need to be precisely controlled. For example, when producing medical - grade PVC pipes, the barrel temperature is generally 160 - 190℃, and the die head temperature is 170 - 180℃. Pressure sensors and temperature sensors are installed to monitor and feedback for adjustment in real - time.
Medical Device Housings: ABS is often used to make the housings of various medical devices, such as diagnostic equipment and monitoring instruments. These housings need to have high - precision dimensions to ensure the installation and operation of internal components, as well as good appearance quality.
Disposable Medical Supplies: PVC is widely used in the production of disposable medical supplies. For example, infusion sets, syringes, and respiratory masks. High - precision molding ensures the accuracy of product dimensions, such as the volume accuracy of syringes and the airtightness of respiratory masks.
Medical Tubing: Both ABS and PVC can be used to make medical tubing. High - precision extrusion molding can ensure the uniformity of the wall thickness of the tubing, the smoothness of the inner and outer surfaces, and the accuracy of the diameter, which is crucial for the flow of fluids and gases in medical tubing.
