Cosmetic Packaging: Advantages of Hot Runner Injection Molding
How to make sophisticated cosmetic packaging molds? Topfeelpack Co., Ltd. has some professional opinions.
Topfeel is vigorously developing creative packaging, keeping improving, and providing customers with high-quality private mold services. In 2021, Topfeel have undertaken nearly 100 sets of private molds. The development goal of company is “1 day to provide drawings, 3 days to produce the 3D protype”, so that customers can make decisions about new products and replace old products with high efficiency, and adapt to market changes. At the same time, Topfeel responds to the global environmental protection trend and incorporates features such as “recyclable, degradable, and replaceable” into more and more molds to overcome technical difficulties and provide customers with products with a truly sustainable development concept.
This year, we launched a new special airless cream jar PJ51 (Please click the item to No. learn more). It does not have a pump or a metal spring, and the product is obtained by easily pressing the air valve to make the piston rise and remove the air. In the choice of mold, we use hot runner instead of cold runner, which makes it better. Usually, the hot runner is used to make high-end cosmetic containers made of acrylic and other materials. This time, we use it in regular PP cream bottles and jars.
Advantages of hot runner technology in injection molding
1. Save raw materials and reduce costs
Because there is no condensate in the hot runner. Or a very small cold material handle, basically no cold runner gate, no need to recycle, especially expensive plastic products that cannot be processed with recycled materials, which can greatly save costs.
2. Improve the degree of automation. Shorten the molding cycle and improve the mechanical efficiency
Plastic products do not need to build gates after being formed by hot runner molds, which facilitates the automatic separation of gates and products, facilitates the automation of the production process, and shortens the molding cycle of plastic products.
3. Improve the quality of the surface
Compared with the three mold plate with double parting surface, the plastic melt temperature in the hot runner system is not easy to drop, and it is kept at a constant temperature. It does not need to be like a cold runner mold to increase the injection temperature to compensate for the drop in melt temperature, so the clinker in the hot runner system The melt is easier to flow, and it is easier to form large, thin-walled, and difficult-to-process plastic products.
4. The quality of the injection molded parts of the multi-cavity mold is consistent, which improved product balance.
5. Improve the aesthetics of injection molded products
The hot runner system can be artificially balanced according to the principle of rheology. The mold filling balance is achieved through temperature control and controllable nozzles, and the effect of natural balance is also very good. The precise control of the gate ensures the standardization of multi-cavity molding and improves the precision of the product.
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