Plastic injection machines are fully suitable for producing disposable syringes, which is a mature process in the field of medical consumables. The following is a specific analysis:
1. Material and process compatibility
Medical grade raw materials: Syringes should be made of plastic that meets medical standards (such as polypropylene PP), which is resistant to high temperature disinfection, has strong chemical stability, and is non-toxic. The injection machine can accurately control the melting temperature to ensure that the material properties do not degrade.
Thin walled forming capability: The wall thickness of components such as the syringe barrel and piston is extremely thin (usually less than 1mm), and the high-pressure injection molding technology of the injection molding machine can ensure that the melt fills the micro cavity, avoiding material shortage or deformation.
2. Core production process
Precision mold manufacturing: The mold requires ultra-high precision (such as the taper tolerance of the needle interface and the clarity of the cylinder scale), and is often made of hard steel. The mold cavity is mirror polished to reduce residue.
Clean production environment: Operate injection molding machines in dust-free workshops, equipped with air filtration systems to prevent plastic particles from contaminating products.
Automatic demolding and assembly: The mold is designed with a top needle mechanism to achieve automatic demolding, and some production lines are synchronously integrated with processes such as piston assembly and needle pressing.
3. Key points of quality control
Sealing test: Conduct pressure testing on finished syringes to check the sealing between the cylinder and piston, and eliminate leaking products.
Dimensional compliance: Use optical measuring instruments to randomly check key dimensions such as needle aperture and cylinder volume to ensure compliance with medical standards.
Surface defect removal: Automated vision system detects burrs, black spots or scratches, especially the inner wall of the needle tube must be smooth and flawless.
4. Efficiency and safety advantages
High speed mass production: the first mock examination multi cavity design (such as 64 pieces from a single mold), with the help of a manipulator, hundreds of pieces can be produced per minute.
Zero pollution risk: The fully enclosed production process avoids manual contact, the raw materials are strictly sterilized, and there is a seamless transition from injection molding to packaging.