1. Requirements for the polishing grade of the cavity for medical injection moulds
In the medical field, many things need to look good, especially clear plastic items like disposable syringes, reagent tubes, medical containers, and so on. Because of this, the polishing level of medical injection mould cavities normally has to be very high.
Some common polishing grades are:
Polishing to a high gloss, mirror finish, or optical grade
For some clear medical items, the cavity's surface roughness needs to be very minimal to make sure the product is clear and shiny. To get a mirror-like finish, many high-end medical injection mould polishing techniques need to be done.
the level of polish on different medical products may be varied
Syringe mould: normally needs to be polished to a high gloss or mirror finish
Infusion set mould: needs a polished surface of excellent quality
Medical container mould: choose the polishing grade based on how clear the product has to be.
Setting reasonable polishing criteria for medical mould cavities can greatly improve the quality of the product.
2. The steps for polishing a medical injection mould hollow
1. Machining moulds with high accuracy
Before polishing, the mould cavity needs to be machined with great precision, like:
CNC machining with high precision Electrical discharge machining High precision grinding
The quality of precision machining will have a direct impact on how well the polishing works. It will be much harder to polish if there are clear knife markings or discharge marks on the surface that has been worked on.
2. Treatment with rough polishing
The rough polishing step is mostly used to get rid of machining markings and make the mould cavity's surface smoother.
Some common ways are:
Polishing with sandpaper
Dressing oil stones Main grinding
The goal of this step is to get rid of machining markings and get ready for the next step, which is precise polishing.
3. Treatment for fine polishing
After rough polishing, the next step is to do finer processing. Fine polishing is the most important part of polishing medical injection mould cavities.
Some common ways are:
Diamond paste polishing, precise grinding, and polishing by hand
This step needs skilled professionals to make sure that the surface of the mould cavity satisfies high-quality standards.
4 polishing with a mirror
Most of the time, mirror quality polishing is needed for high-end medical moulds. This process might make the mold's surface more smoother.
Mirror polishing commonly uses:
Material for ultra-fine grinding
Tools for polishing that are made just for it
Fine polishing by hand technique
When it's done, the surface of the cavity looks like a mirror.
3. Important technical criteria for the polishing process of medical injection moulds
When polishing the cavities of medical injection moulds, it is important to keep a close eye on many technical aspects.
First, control the roughness of the surface.
To make sure that the products look well, medical moulds usually need a very smooth surface.
Next is how evenly the polishing is done.
It is easy to make the product have:
Defect in appearance of inconsistent lustre
Moulding that isn't stable
when polishing medical moulds, you need to keep the direction and force of the polishing even.
It's also important not to polish too much.
Too much polishing can modify the size of the mould, which can affect how accurate the product is. So, when polishing medical injection moulds, you need to be very careful about how much you do it.
4. How polishing the inside of medical injection moulds affects the quality of the product
Polishing the cavity of a medical injection mould to a high standard is not only for looks; it also has a direct effect on the quality of the product.
Mostly shown in the following ways:
Make the product more clear
The smoother the cavity surface of clear medical plastic items, the more see-through they are.
Make the product look better
A mould that is thoroughly polished helps keep the product's surface from having flaws.
Make the demolding effect better
It is easier to demold products that have smooth surfaces, and this can help keep them from getting damaged.
Make production more efficient
A well-polished surface can make the production process flow more smoothly and make the whole process more efficient.
many companies that make medical moulds put a lot of effort into making sure that polishing is done correctly for medical injection moulds.
