Global war "epidemic" ︱ The United States, Canada, the Czech Republic and other places rush 3D printing protective masks

Doctor Jia made a 3D printed face mask and shared the modeling

Canadian emergency room doctor Dr.
Tarek Loubani also recently used 3D printing to make protective face shields to provide protective equipment for front-line medical staff in Canada
.

Dr.
Tarek Loubani

Dr.
Tarek Lubani told the CBC: "With the increase in confirmed cases of Covid-19 in Canada, we realize that the trajectory of Covid-19 in Canada will be the same as anywhere else
.
If there is a lack of face coverings and other personal protection elsewhere Equipped, Canadian hospitals will face the same situation
.
”

So Dr Tarek Lubani designed an easy-to-make face shield, 3D printed from plastic, mylar and elastic
.
The mask basically covers the entire face and acts as a barrier to virus droplets or other liquids
.
"If masks are in short supply, this mask can also replace N95 masks
," added Dr Tarek Lubani
.

At present, Dr.
Tarek Lubani has uploaded the 3D printing model of the mask to the Github website, and provided detailed 3D printing, disinfection, cleaning, assembly and manufacturing instructions, which can be downloaded for free
.

Multiple measures to reduce pollution in the production process of 3D printed face shields

Czech 3D printer manufacturer Průša Printer took 3 days to model the 3D printed protective face shield and tweaked the structure of the face shield to make it as easy to 3D print as possible
.

Průša Printer said that currently the company can produce 800 protective masks a day, which is mainly limited by the cutting speed of the laser cutting machine for plastic masks, otherwise it is possible to complete the production of 4,000 protective masks a day
.

Průša Printer's 3D printed face shield modeling design

During the process of 3D printing the protective face shield, Průša Printer took measures to reduce bacterial contamination of the face shield
.
For example, during the 3D printing process, the plastic is heated to a relatively high temperature, which can sterilize the printed product.
After the printing is completed, do not let the printed parts dry on the workbench for too long to avoid recontamination
.
Before moving the 3D print, be sure to put on new gloves and a medical mask, and put the 3D print directly into the airtight bag
.

3D printing workshop at Průša Printer

In Průša Printer's 3D printing workshop, the indoor air is changed every 2 minutes and filtered to reduce any harmful substances in the air
.

Průša Printer also states that when laser sintering this part of the plastic transparent mask, leave the protective film open until assembly and use
.
This can greatly reduce any possible contamination, and at the same time package the masks in one batch for each production.
For example, Průša Printer's printer can produce 40 plastic transparent masks at a time.
Each time the printer is turned on, 40 transparent masks are packaged together and put into Seal bag
.
Gloves and a mask must also be worn when cutting the elastomeric elastic of the face shield
.

Medical face mask customized for Asians

Affected by the new crown pneumonia epidemic, the demand for protective equipment for medical staff in Hong Kong has surged, and there is also a shortage of protective face shields
.
The Hong Kong Polytechnic University recently used 3D printing technology to complete the design work within 5 days, and urgently produced a batch of medical protective masks to solve the current urgent needs
.

The Hong Kong Polytechnic University recently used 3D printing technology to complete the design work within 5 days

According to experts, this medical mask is based on Asian head shape data, and provides two sizes of medium size and large size, striving to better fit the head shape of medical staff, and combined with design knowledge to optimize the self-made medical mask.
Appearance, medical staff are more comfortable when wearing
.

The protective face shields have already started mass production through local manufacturers, and 10,000 pieces are delivered to the Hong Kong Hospital Authority daily.
It is estimated that 30,000 pieces can be delivered daily by the end of March
.
At the same time, the Hong Kong Polytechnic University has activated about 30 3D printers, operating 24 hours a day, to assist in the production of mask structures to meet the urgent needs of the medical and healthcare sector
.