
Medical Consumer Injection Moulding
Medical consumer parts are increasing greatly since COVID-19, SJ has specialized in making medical plastics injection moulding and products for over 35 years, this plunger rod with minimum tolerance,high precision and world class facility and machining making SJ group stand out from other factories.
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- Quality Assurance
- 24/7 Customer Service
Product Introduction
Medical consumer parts are increasing greatly since COVID-19, SJ has specialized in making medical plastics injection moulding and products for over 35 years, this plunger rod with minimum tolerance,high precision and world class facility and machining making SJ group stand out from other factories.

Part Name | Plunger Rod |
Resin | PP |
Cavity | 64 cavities |
Runner | Hot runner valve pin turn to cold runner with sub gate |
Cycle Time | 12s |
Part size | ∅12.50X37.00 mm |
Part weight | 0.7g |
Clamping force of IMM | 180T |

In the past 3 decades, we made many projects and developed a lot with customer support, SJ will do a customer satisfaction survey twice a year in order to give a better service and cooperation experience, experience technical team, prompt support and stable quality helped our team received lots of good feedback from customers.




1. In the early stage of the project, SJ professional MF and DFM technical engineers will provide technical support;
2. Once the project kick off, there will be a special team to serve the large mold project. In SJ Group, total 50 designer, 36 project engineers, 25 tooling engineers, 220 tool maker, 55 quality engineers;
3. Before the project kick off, SJ will organize sales engineer, project engineer, technician, designer and tool maker to conduct preliminary communication;
4. Mold shipping does not mean the end of SJ service, SJ will fast response the customer's demands base on SJ world service system. SJ Europe, SJ America and SJ Mexico will take care of after sales service for our global customer, we will be right there, no matter when or where the customer contact us.



We have a mature and professional project management team covered 30 people, all the project engineers have more than 3 years’ experience in molds design and 5 years’ experience in molds projects management, and they are fluent in English communication.
In every step, we have strict process to follow and have standard documents to submit to customers, such as the DFM and Mold flow in project kicking off stage, then weekly progress report during molds manufacturing stage, and mold trial reports, trial video, samples measurement report after first mold trial.


1. Factory equipped with top-class machines to guaranty for stable quality, such as YASDA, Mikron, MORISEIKI, Agiecharmilles, SODICK, MAKINO, Carl Zeiss, Sumitomo, ARBURG, ENGEL etc.
2. Big capacity enable our short lead-time and on-time delivery: 3 tools shops located in Shenzhen and annual molds capacity is 1200pcs in total.
3. Strong Capabilities of Design and Manufacturing: 30 senior molds designers, average mold design experience is 8 years. Experienced in high precision, tight tolerance and complex molds.
4. Expert in Speaker Grill injection molds, we made more than 10 molds every year for varied type of Speaker Grills.
Hot Tags: medical consumer injection moulding, China, suppliers, manufacturers, factory, customized, made in China
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