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SLA 3D printing services
Writer： admin Time：2020-07-01 16:38 Browse：℃
What is the most commonly used material for 3D printing? It is estimated that the first material that comes to mind in the 3D printing industry is photosensitive resin.
Photosensitive resin is a kind of 3D printing material. It is similar to ABS material. It has a smooth surface and high precision. The surface can be painted and the hardness is also acceptable.
Photosensitive resin is very suitable for printing prototype models, such as design models, and there are special requirements for functions in addition to appearance,
For example, it should be resistant to high temperature or tougher.
Photosensitive resin is molded by SLA/DLP technology, SLA is also called photocuring molding, it uses ultraviolet light or other light beam to cure
Liquid photosensitive resin.
Photosensitive resin, literally, is a resin material that is sensitive to light, and will be cured quickly after light irradiation
Compared with SLA, DLP printed items have a smooth surface and high molding quality, so many DLP models are positioned
For the jewelry level.
The following is a detailed introduction to the characteristics and application of photosensitive resin.
Characteristics of photosensitive resin
Photosensitive resin is generally in a liquefied state, and objects printed with this material generally have the characteristics of high strength, high temperature resistance, and waterproof. however,
Photosensitive resin material is not easy to use for a long time, which may cause hardening.
The specific characteristics of photosensitive resin are as follows
1. Low viscosity;
2. Small curing shrinkage;
3. Fast curing rate;
4. Small swelling;
5. High light sensitivity;
6. High degree of curing;
7. High wet strength.
In addition, the price of photosensitive materials is relatively expensive compared to desktop-grade PLA, and at the same time, because it needs to be poured into the container during use, it is easy to cause waste.
Application of photosensitive resin
The finished product of SLA 3D printing of photosensitive resin material has very good details and high surface quality, and can be colored by painting and other processes. But photosensitive resin printed items
If exposed to light for a long time, it will gradually become brittle and yellow. This material is mostly used for printing on the accuracy and surface quality requirements of the model
Higher detailed models, complex design models, such as hand-made, hand-made,
Jewelry or precision fittings, etc. But it is not suitable for printing large models. If you need to print large items, you need to print them apart.
In addition to the high toughness, high temperature resistance and ordinary photosensitive resin mentioned above, there are translucent and fully transparent photosensitive resins. But need
Reminder is that translucent and fully transparent
After printing, it needs to be post-polished. Where it cannot be polished, the transparency will be slightly worse.
Photosensitive resin material is not only good in molding effect, but also relatively cheap, so it has become the material of choice for printing hands. For a sample before the product goes to market
Whether it is feasible to conduct visual and functional verification,
This proofing fee is really very cost-effective, compared to direct production without proofing, it can save a lot of money.
However, many customers have such a question, photosensitive resin as a liquid material, there are chemical smells, then it is toxic?
In fact, the photosensitive resin material can't simply say whether it is toxic or non-toxic, the toxicity must be combined with the dosage, generally after normal light curing,
There is no problem. The light-curing resin is the base resin of the light-curing coating, which is compounded with the photoinitiator, reactive diluent and various additives,
That constitutes a photocurable coating. Light-curing coatings are the earliest examples of large-scale successful application of light-curing technology in industry, and are also the current field of light-curing industry
The product with the largest production and sales volume, so you can feel at ease. In fact, judging from the commonly used chemical materials in life, it is not difficult to find most polymers
They are all non-toxic and usually used plastics. In fact, many melamine tablewares, that is, a kind of plastic like melamine, are made of melamine.
Everyone should be familiar with cyanamide, but its polymer is non-toxic. Of course, some black workshops have poor raw materials or poor craftsmanship, which is indeed toxic.
Therefore, users who worry that the photosensitive resin material is toxic can cause harm to the human body, as long as the photosensitive resin material you purchase is regular, except
In addition to the need to pay attention to ventilation protection during the printing process, the items after 3D printing are non-toxic and can be used and contacted with confidence.
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