Barnes Group has filed a patent for an injection molding apparatus that includes a heatable manifold, one or more nozzles, and a flow channel to deliver molten injection fluid to a mold cavity. The apparatus also features an electrical drive, a valve pin, and an actuator with a driver and actuator housing. A source of heat absorptive fluid and at least one channel are included to absorb heat from the actuator housing and drive mount during the injection cycle. GlobalData’s report on Barnes Group gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Barnes Group, braking system fluid circuit was a key innovation area identified from patents. Barnes Group's grant share as of September 2023 was 58%. Grant share is based on the ratio of number of grants to total number of patents.

Injection molding apparatus with heat absorptive fluid for cooling

Source: United States Patent and Trademark Office (USPTO). Credit: Barnes Group Inc

A recently filed patent (Publication Number: US20230311385A1) describes an injection molding apparatus that includes several innovative features. The apparatus consists of a heatable manifold that receives molten injection fluid from an injection molding machine and maintains it at a selected temperature. The fluid is then passed through a flow channel and delivered to a gate of a mold cavity via one or more nozzles.

The apparatus also includes an electrical drive with an interface that receives and distributes electrical energy in controllably varied amounts during an injection cycle. An actuator, coupled to a valve pin, controls the flow of the molten injection fluid towards the mold cavity by moving the valve pin. The actuator is driven by a driver, which receives the controllably varied electrical energy from the electrical drive. The actuator housing, which houses the driver, is designed to absorb heat from the actuator housing and the drive mount. This is achieved through the use of at least one channel formed in or near the actuator housing and the drive mount, which is interconnected to a source of heat absorptive fluid.

The patent also describes a method for injection molding using the apparatus. The method involves heating a manifold, receiving molten injection fluid from an injection molding machine, and maintaining it at a selected temperature. The fluid is then delivered to the mold cavity through a flow channel. During the injection cycle, the electrical drive distributes electrical energy to the actuator, which controls the movement of the valve pin. At the same time, a heat absorptive fluid is routed through channels in the actuator housing and the drive mount, absorbing heat from these components.

Overall, this patent introduces an injection molding apparatus and method that incorporate features to maintain the temperature of the molten injection fluid and absorb heat from the actuator housing and drive mount. These innovations have the potential to improve the efficiency and performance of injection molding processes.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.