Sanrong offers a wide variety of packaging options, including cosmetic bottles, cream jars, food jars, and airtight containers, all manufactured by multiple OEM production facilities. Our comprehensive OEM strategy reduces capital risk, facilitates customization, and creates a highly flexible production base, providing cost-effective distribution equipment for numerous consumer goods markets. Whatever your packaging needs, as long as you require the highest level of quality, service, and overall value, we can meet your requirements.
We manufacture standard and custom packaging bottles for the cosmetics and beauty product packaging, personal care product packaging, and cleaning and automotive packaging industries. We offer a wide variety of packaging bottles, including vacuum bottles, foam bottles, cosmetic bottle series, cream bottle series, food jar series, and airtight jar series. Our packaging bottle materials include AS, HDPE, PET, PETE, PETG, PMMA, PP, PS, PVC, and SAN.
Sanrong can help you obtain a wide variety of packaging products. We have established an extensive supplier network in the packaging industry. All suppliers have undergone on-site visits and qualification checks by our on-site engineering and procurement experts. We continuously audit all qualified suppliers to ensure they meet quality standards, service and performance objectives, and comply with all local labor laws. Whether you need hoses, caps, bottles, double-walled jars, droppers, or other packaging products, we can help you find the right products.
The first step is raw material feeding: Shaped plastic granules are precisely fed into the molding machine’s hopper via automated equipment. The hopper, acting as a temporary raw material storage device, is designed to ensure uniform granule descent, providing a stable supply for subsequent continuous processing and preventing uneven feeding from affecting production quality.
The second step is entry into the pipeline and melting: The screw at the bottom of the hopper starts, rotating under motor drive, and using spiral grooves to transport the plastic to the forward granule conveying assembly. Simultaneously, the heating structure outside the screw gradually heats the granules during the pipeline process, softening and evaporating them, ultimately forming a free-flowing plastic melt. Precise temperature control, screw operation, and melt quality are crucial at this stage.
The third step is injection and cooling: A high-pressure system propels the plastic melt rapidly into the customized mold cavity. The melt fully fills the cavity, conforming to the mold’s inner wall to form the part shape. Then, the cooling system within the mold lowers the temperature through methods such as cold water circulation, allowing the melt to quickly solidify and ensure stable part shape.
Finally, demolding and part removal: After the part cools down, the mold opens efficiently under mechanical action, and the ejection mechanism smoothly ejects the molded part, thus completing the production of a single plastic part. The entire process is seamless and meets the needs of mass production.
Injection stretch blow molding is a precision molding process optimized from traditional blow molding. Its core advantage lies in activating strength and transparency through preform segmentation. It is widely used in the manufacture of high-requirement hollow packaging (such as beverage bottles and cosmetic bottles), and the process can be divided into four steps.
The first step is preform casting: Pre-fabricated modern preforms are piped to specific stations for precise heating or cooling. Heating requires controlling the temperature gradient to ensure the preform has approximately axial elasticity; localized cooling targets the stretched areas for shaping, laying the physical foundation for subsequent axial stretch blow molding. This step directly affects the final mechanical properties.
The second step is preform clamping and air blowing: The formed preform is precisely clamped into the custom mold preform by mechanical jigs. Simultaneously, a stretching rod extends into the preform, working in conjunction with the mold closure to complete initial positioning. High-pressure air is then rapidly injected into the preform, its end working in conjunction with the stretching rod to push the plastic against the inner wall of the mold.
The third step is bonding and shaping: Under continuous air pressure, the plastic fully adheres to the inner wall of the mold, perfectly replicating the texture, size, and shape of the cavity. Simultaneously, the mold’s built-in cooling system activates, rapidly removing heat through circulating cold water, allowing the plastic to cool and separate from its softened state, maintaining a stable molding shape and preventing shrinkage and deformation.
Finally, demolding and part removal: Once the part has completely solidified, the mold automatically opens, and the ejection mechanism smoothly ejects the finished product, completing the production of a single hollow part. This process combines high efficiency with low density, producing thin-walled, uniformly strong packaging products.
Injection blow molding is a common molding process used in the manufacture of hollow plastic bottles. With its streamlined process and adaptability to various plastic materials, it is widely used in packaging production in the food and daily chemical industries. The core process consists of three steps, balancing molding efficiency and product uniformity. The first step is preform pretreatment and mold loading: The thermoplastic preform, produced by injection extrusion, is precisely heated to ensure it reaches a soft and malleable state while avoiding overheating that could lead to deformation. Then, a robotic arm smoothly loads the heated preform into a pre-cooled metal mold cavity. The cooled mold wall quickly contacts the preform, initially restricting its shape and laying the foundation for subsequent shaping, while also reducing subsequent cooling time. The second step is pneumatic shaping: After the mold closes, high-pressure air is rapidly injected into the preform through a dedicated air channel. The powerful air pressure pushes the soft plastic against the mold wall from all directions, ensuring the plastic perfectly conforms to the texture, size, and shape of the mold cavity, accurately replicating the main shape of the bottle. This step requires strict control of the air pressure and duration to ensure uniform plastic adhesion and avoid air bubbles or dents. Finally, there’s the trimming and unloading: After the plastic cools, hardens, and sets within the mold, the mold opens, and the formed bottle is conveyed to the trimming station. The trimming machine, using high-speed rotating blades, precisely cuts away any gate residue at the top of the bottle and excess plastic at the bottom, ensuring neat edges and compliance with specifications. After trimming, the machine uses an ejector device to transport the finished bottle to the next stage. The entire process achieves efficient transformation from preform to qualified hollow packaging.
In today’s increasingly competitive market, product customization has become crucial for breaking through homogenization and achieving differentiated competition. Whether a product can ultimately win market recognition and consumer favor hinges on its ability to precisely balance customized aesthetics and affordability—both conveying brand identity and attracting target customers through unique appearance and personalized styling, while controlling costs to transform customization advantages into market competitiveness. This core logic applies whether you plan to upgrade existing products, revitalize them, launch a new product line, or seize market gaps. Sanrong leverages its rapid prototyping capabilities to provide efficient solutions for your product customization. Compared to traditional customization models, rapid prototyping eliminates the need for large upfront mold investments, effectively limiting capital risk and reducing trial-and-error costs. Simultaneously, its efficient production response capabilities can quickly transform multiple design schemes into physical samples, allowing you to promptly collect consumer feedback and adjust design directions based on market demands, avoiding resource waste caused by design falling short of market demands. Whether optimizing packaging visual details or adjusting product structure, Sanrong’s flexible and efficient customization services help your products stand out in fierce competition and achieve your business goals.
Once you’ve identified your client’s preferred design, Sanrong leverages its end-to-end service capabilities to expedite the customized product’s launch. Our professional team of product design engineers possesses a precise understanding of design details and brand aspirations. Combined with extensive contract manufacturing resources, we achieve seamless integration between design and production—ensuring both the precision of the customized product’s craftsmanship and controlling costs through economies of scale. This allows you to bring your customized product to market at a highly affordable price, completely eliminating concerns about “customization equals high price.” Crucially, Sanrong boasts unparalleled rapid delivery capabilities in the industry. From design confirmation to production rollout, we significantly shorten the product launch cycle by optimizing supply chain processes and improving manufacturing efficiency. This helps you seize market opportunities, quickly establishing a market advantage before competitors react, laying a solid foundation for a successful product launch. Whether your customization needs focus on a single component (such as cosmetic bottles, cream jars, food containers, or airtight containers) or encompass an entire packaging system, Sanrong can provide tailored solutions. We delve into the fusion of design and function, ensuring that every customized detail serves to shape a unique brand identity. Ultimately, this helps you strengthen brand recognition in the market, achieving success in both business objectives and brand value.
