3D printing optimizes the design of cooling water circuit for automotive electronic connector molds

3D printing optimizes the design of cooling water circuit for automotive electronic connector molds

On the basis of 3D printing conformal waterway mold technology, ESU also explored the application of its patented mold composite printing technology in Electronic connector molds, that is, inlaying high thermal conductivity materials inside parts, combined with circulating waterways, in While maintaining almost the same cooling efficiency as the conformal waterway solution, the service life of the mold workpiece is further improved.

On the basis of 3D printing conformal waterway mold technology, ESU also explored the application of its patented mold composite printing technology in electronic connector molds, that is, inlaying high thermal conductivity materials inside parts, combined with circulating waterways, in While maintaining almost the same cooling efficiency as the conformal waterway solution, the service life of the mold workpiece is further improved.

The purpose of the cooling water channel design of the injection mold is to cool the product evenly and eject it in a short time. The quality of the water channel arrangement directly affects the molding quality of the product and the production cycle/cost. 3D Science Valley will share the application case of ESU’s automotive electronic connector mold 3D printing to demonstrate that 3D printing technology is optimizing the cooling design scheme of existing automotive electronic connector molds, and that conformal cooling technology can reduce cooling temperature and improve electronic The value played in terms of connector product quality.

3D printing optimizes the design of cooling water circuit for automotive electronic connector molds

Various types of electronic connectors.Source: ESU Yisu

There are water channels on the top and inner wall of the mold

The automotive electronic connector is like a bridge to connect the current between various electronic components in the car, so as to ensure the safe driving of the car. There are about 100 electronic connectors per car, and the global automotive connectors account for about 15% of the connector industry. In the future, it is expected to occupy a larger proportion driven by automotive electronic products. China is expected to become an important production base for global automotive connectors in the future. At the same time, China’s automotive connector industry will be a very competitive market between foreign companies and Chinese local companies. The manufacturing technology and product quality of automotive electronic connectors is crucial in this battle.

The mold manufacturing technology of automotive electronic connectors is a key factor in determining the quality of electronic connectors, and the quality of automotive electronic connectors is directly related to the safety performance of the car.

In the molding of electronic connectors, due to the lack of draft on the inner wall and the small size of the top parts, the ordinary waterway cannot be designed due to the limitation of the drilling method of the traditional CNC milling machine. Therefore, most of the connector molds do not have any cooling water in the glue position, which will lead to long cooling cycle and uneven cooling, resulting in problems such as product deformation and dimensional instability, resulting in unqualified product quality.

The design and manufacturing scheme of the mold conformal cooling water circuit realized by the selective laser melting 3D printing technology will solve this pain point, significantly reduce the cooling temperature, and improve the product quality. ESU has redesigned the automotive electronic connector mold based on the selective laser melting 3D printing technology. The conformal waterway basically spreads all over the connector mold. The entire connector has waterways on the top and inner wall, which makes the mold temperature balance.

The maximum temperature of the entire connector mold after using the conformal water channel is 66.65 °C, which is nearly 30 °C lower than the mold temperature without water channel. Therefore, the temperature difference of the whole part is relatively small, and the mold temperature is balanced, thereby reducing the deformation rate and improving the product quality.

Source of the above case: Shanghai Yisu Laser Technology Co., Ltd.

3D Science Valley Review

With the rationalization of the price of metal 3D printing equipment, the development of 3D printing molds in China will usher in a wave of upward development opportunities, and taking value as the entry point will become an essential homework to win the mold market.

Although the design of the 3D printing conformal cooling waterway is significantly different from the design thinking of the traditional cooling waterway, the design rules of the traditional mold cooling waterway in terms of waterway diameter, cross-sectional area, distance from the mold surface, and cooling waterway length can still be improved. The design of the conformal cooling water channel for material manufacturing brings lessons that can be used for reference. 3D printing can be used not only in the field of injection molds, but also in the fields of tire molds, die-casting molds, etc. Combined with the characteristics of 3D printing that can realize complex geometric design, the added value created by 3D printing molds also extends to the next generation. high value-added products such as tires.

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