About Us
Injection Molded Products Manufacturer
YEJIA Optical Technology (Guangdong) Corporation is your premier partner for top-quality silicone rubber products and custom plastic parts. As a leading OEM manufacturer, we specialize in manufacturing silicone valves, silicon lenses, LSR speaker diaphragms, plastic optics, plastic dispensing caps and more. Our seamless integration of research, development, production, and sales ensures a comprehensive service for large-volume injection molded products, delivering excellence from mold design to finished product assembly.
Our state-of-the-art factory spans over 10,000sqm of clean molding workshops and holds certifications including ISO13485, ISO45001, IATF16949, ISO9001, and ISO14001. Equipped with advanced machinery such as imported plastic injection molding machines, LSR injection molding machines, automatic production equipment, and vacuum compression molding machines, we guarantee precision, high quality, and production efficiency. Stringent quality inspection processes and comprehensive testing equipment further ensure product stability and consistency.
YEJIA Optical has solidified its position as a trusted supplier to numerous Fortune 500 companies due to our precision manufacturing capabilities. Our products find applications across various industries including food and beverage, automotive, optics, acoustics, mobile phones, outdoor electronics, smart wearables, medical, beauty, and more.
Our dedicated team of 36 experts is committed to providing tailored solutions for custom plastic and silicone rubber products. Through our ERP system and Manufacturing Execution System (MES), customers can easily stay informed about order dynamics and monitor project progress. When it comes to high-level custom plastic and silicone rubber products, YEJIA Optical is the ultimate choice for renowned brands.
development history
Yejia Optical Technology (Guangdong) Corporation (Dongguan Yejia Optical was renamed).
Nov., 2016
April, 2016
Optical Division was merged.
Dongguan Yejia Optical Technology Co., Ltd. (Tronshin was renamed).
Nov., 2015
Aug., 2014
Optical Division II was invested.
Optical Division was set up.
Sep., 2013
Feb., 2012
Dongguan Tronshin Silicone Products Co., Ltd. moved to Pacitech Town.
Dongguan Tronshin Silicone Products Co., Ltd.
June, 2009
Our Advantage
Mold Design& Manufacturing
YEJIA has independently developed our own LSR cold runner system and uses imported mold processing equipment. With a team of experienced engineers from China, Japan and Korea, we ensure exceptional precision in mold production. Our extensive expertise in mold cleaning and maintenance further guarantees consistent product quality from the outset, maximizing profitability for our customers.
Extensive Production Expreience
With over 20 years of injection molding experience, YEJIA has imported ARBURG LSR injection molding machines and SUMITOMO plastic injection molding machines for mass production. Whether for silicone rubber products or customized plastic parts, our skilled production management team minimizes defects and ensures consistent and stable product quality to meet customer needs.
In-house Automation Development
For high-volume silicone rubber products or custom plastic parts, YEJIA has a specialized team focused on automation. With efficient production management and full automation inspection equipment, we offer tailored automation solutions for large-scale clients, driving cost reduction and improved efficiency.
Large Client Management Expreience
Since the establishment, YEJIA has served world-renowed Fortune 500 clients across multiple industries. With extensive experience in managing large clients, we provide high quality injection molded products and services tailored to the needs of major customers.
Injection MOLDING
LSR injection Moldding
LSR injection molding is a specialized process that shares similarities with plastic injection molding. However, unlike the latter, LSR injection molding involves injecting the material liquid silicone rubber (LSR) through the feeding system after the mold is closed. The material is then heated and injected to produce silicone products. It is a process that changes the liquid silicone material to the solid silicone products.
Silicone Overmolding
Silicone overmolding is a process that involves a second molding of silicone material with another type of plastic, metal, fabric, or silicone part. This process can be divided into two categories: LSR overmolding (liquid silicone) or compression overmolding (solid silicone). YEJIA has been the leading manufacturer of silicone rubber products, experienced in silicone overmolded with other materials.
Compression Molding
Compression molding is a widely utilized method for producing silicone products that are popular among consumers, such as silicone sealing rings, silicone bottle sleeves and consumer silicone products. This technique offers lower tooling costs and is suitable for products with a variety of colors. It is a highly effective means of manufacturing these types of products and has been embraced by many industries.
Plastic Injection Molding
Plastic injection molding is a traditional and widely used manufacturing process, where molten plastic is injected into a mold to create a wide range of plastic parts. It’s a process that melting plastic particles into liquid, then cool it into solid plastic products. What sets YEJIA apart is our focus on producing high-precision, high-quality, and highly automated custom plastic parts.
