How to ensure the high precision requirements of medica […]
How to ensure the high precision requirements of medical molds?
Most domestic medical mold manufacturing companies generally use grinding, Plastic medical mould electrical processing and fixture processing in the finishing stage. At this stage, many technical parameters need to be controlled, such as part deformation, internal stress, form and position tolerance and dimensional accuracy. It is more difficult to operate in specific production practices, but there are many effective empirical methods, including the following:
Medical mold finishing process control
Medical mold parts processing, an overall guiding ideology is to adapt to different materials, shapes and different technical requirements. It has a certain degree of plasticity, and good processing results can be achieved by controlling the processing.
Medical mold parts heat treatment
The heat treatment process of the parts requires the parts to obtain the required hardness, while controlling the internal stress, ensuring the dimensional stability of the parts during processing, and performing different treatments on different materials. In recent years, with the development of the medical mold industry, the types of materials used have increased. In addition to Cr12, 40Cr, Cr12MoV, cemented carbide, you can also choose some high-strength, powerful punches, new materials powder alloy steel (such as V10, ASP23, etc.).
The quality of medical molds directly determines the quality of the product. In the field of medical devices, molds also affect the quality and productivity of medical device products. However, with the improvement of the technical indicators of medical devices, especially in advanced technology fields such as micro-precision medical plastics, domestic equipment technology has been greatly tested.
There are three main types of machine tools for grinding, surface grinder, inner and outer peripheral grinder, and tool grinder. During the grinding process, it is necessary to strictly control the occurrence of grinding deformation and grinding cracks, and small cracks also appear in the subsequent processing. Therefore, the feed of the fine grinding should be small, the coolant should be sufficient, and the parts with a dimensional tolerance within 0.01 mm should be ground to a certain temperature as much as possible.
Medical mold surface treatment and assembly
Tool traces remain on the surface of the part during processing. The grinding wheel is a place where stress is concentrated and becomes the source of the development of cracks. Therefore, after processing, the surface of the part is strengthened and the risk of processing is treated with jig grinding. Some edges, sharp corners and openings of the workpiece are dull and rounded. Generally speaking, the surface of electrical appliances will produce a metamorphic hardened layer of about 6-10m. The color is off-white, the hardened layer is brittle and has residual stress. The hardened layer must be fully removed before use. Surface polishing, polishing to remove the hardened layer.